I received an opportunity to make a poster submission to ICDE, i.e. IEEE International Conference on Data Engineering. I want to know if I submitted the poster, can I submit the full version of paper, with almost the same content, but much extended, to another conference?  I found a similar question, but I look forward to a detailed answer for my specific question. That question discusses the general case for Computer Science. Its answer says for different domain, the rule is different. I hope to know the rule for ICDE, because the deadline is 4 days later and I have to make a decision on whether submitting the poster. If submitting the poster will disable me to submit the full paper to another conference, then I will cancel the submission. Otherwise I will make the poster submission.  Thank you all for helping me!

If I presented a poster at a conference that contained the results of some research, can I then write a paper using those same results and submit it to another conference as a full paper?


I downvoted  because it recommended a really terrible library. The author edited the reference out during the initial 5 minute (?) grace period.   I didn't get back to the answer for a while, and when I did I was unable to reverse the downvote because the question had not been edited, as far as the system was concerned, and it was too long since my downvote had happened so it was "locked in".   Is there anything that can be done about this?

I've looked through a number of the "Vote too old to be changed" questions, but I think this one's different.  I gave a downvote to an answer I thought had a critical defect, and I left a comment describing the defect. The answer was edited to satisfy my criticism, but it was done within the short grace period where edits aren't recorded as such. When I try to cancel my downvote I get the error - "Your vote is now locked in unless this answer is edited" - but it was edited!  In reference to this answer:


Is $\mathbb Z[ \sqrt{-3}]$ UFD ? If so , why $$4=2 \times 2 = (1+\sqrt{-3}) \times (1-\sqrt{-3} )$$ and every terms are irreducible ?

I'm considering the ring $\mathbb{Z}[\sqrt{-n}]$, where $n\ge 3$ and square free. I want to see why it's not a UFD.   I defined a norm for the ring by $|a+b\sqrt{-n}|=a^2+nb^2$. Using this I was able to show that $2$, $\sqrt{-n}$ and $1+\sqrt{-n}$ are all irreducible. Is there someway to conclude that $\mathbb{Z}[\sqrt{-n}]$ is not a UFD based on this? Thanks.


the word you use when you say "its right up my alley" e.g its inside my _______. it means collection of interest or range of interest.

I am creating a user profile page, and one of the sections will contain a list of the subject areas in which the user has had the most activity and up-votes e.g. User a has answered the most questions and/or received the most up-votes in categories x, y, z. The assumption is that categories where the user answered a lot of questions and received the most up-votes would be categories in which the user has a degree of expertise.   The section will list the categories under which the user's highest percentage of the above two took place.  I am struggling to find a succinct, natural heading for this section.   I am playing around with:   John's Top Subjects John's Areas of Expertise John's Expertise   ...but none of the above fit the scenario exactly, and all feel awkward and unnatural.  Looking for suggestions.


I know that $1$ is not a prime number, but what about $-1$?  Furthermore, what is the reason we categorise $1$ as not being prime?

From my understanding it's not prime because it's not greater than $0$. So my followup question is why did mathematicians exclude $-1$?  The definition of prime is having only two factors.   $-1 \cdot 1 = -1$


Here's my cast iron frying pan. I had seasoned it before but wasn't sure if I'd got it right so I figured I'd start again. I'm not clear on what state it needs to be in before I do that. I sanded a little bit to remove the bumpy black residue but it was an extremely slow process. What is the black on my pan and do I need to remove it all to be silver again before I season?

I just purchased a new cast iron skillet. What's the best way to season it?   And if I need to re-season an old pan, is the process any different?


When I woke up his morning, I had >80 GB of free space on my hard drive. Over the last four hours, in which I wasn't even around, something filled my hard drive completely. I would attach a screenshot, but there isn't even room to save one.   I'm currently looking at around 210GB of 'other' on my 250GB HD - and I have no idea where it came from. It's always been fairly stable until today.   I am, of course, deleting everything I can afford to, but unless someone knows of something huge I can nuke where 'other' is, I don't think I'll be able to get it down to a manageable size.  I have a Time Machine backup. If I restore to it, will it also contain this huge amount of 'other'? Or is there a better option?

Every few days I get notices on my MacBook that it's running or run out of hard drive space. Curiously, restarting the computer will enable me to recover gigabytes of space (this past time, it was able to recover about 2.2GB). However, I can't identify anything in my personal activity that consumed that space.  It's possible that it's a rogue iTunes podcast or a huge software update that my Mac is automatically downloading - would either of these reclaim the space upon a restart?  One possibility that I can think of is that FileVault has some sort of disk leak, allocating but not freeing files. Does this make sense? Is there a tool that I can run to determine where this space is going? Assuming it is FileVault, should I try to disable it? What's the best way to turn of FileVault on a nearly full computer?


When I ran this command:  sudo apt install openjdk-8-jre-headless   I keep getting this:  E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?

I get this error when trying to use apt-get:  E: Could not get lock /var/lib/dpkg/lock - open (11 Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?     How can I fix this?


After installing Ubuntu 18.04 LTS when I press the power button there is no option for sleep or suspend.  How can I get these options to show up?

In 17.04 I could suspend\hibernate from the power off menu button.  I can't find how to do this in Ubuntu 17.10 GNOME Shell.


Show that $\gcd(\gcd(a,b),b)=\gcd(a,b)$. Let $k=\gcd(a,b)$. Show that $\gcd(k,b)=k$ Since $k\mid a$ and $k\mid b$ (clearly $k\mid k$) we see that $k|\mid\gcd(k,b)$ and $k \leq \gcd(k,b)=\gcd(\gcd(a,b),b)$. Now I need to show that $\gcd(k,b) \leq k$ and so $\gcd(\gcd(a,b),b)=\gcd(a,b)$ Any hints or solutions are greatly appreciated.

Prove $\gcd(a,b,c)=\gcd(\gcd(a,b),c)$ for $0\ne a,b,c\in \Bbb{Z}$. I tried solving it with sets but I sense there are some details I am missing. I would truly appreciate your reference.


I have a subtitle .srt file. Is there an app which can change the encoding of this file. (I guess it's encoding is Arabic(windows-1256) but vlc and MXPlayer didn't open it.) The link of subtitle is .

When I want to see a movie or video in mac os x (with VLC, DivX Player, Quick Time) and want to load subtitles, these video player applications can't load my subtitle correctly show in strange text. My subtitle language is Farsi (RTL language). I must change some Unicode settings, but I don't know where anyone has any idea?


newbie here.  As I read through webpages, i got to know that Oscillators are capable of changing DC to AC. I made a phase shift circuit in Multisim, but I got no idea what should I do next.  I was thinking using DC source as input and it will produce AC output, like some sinusoidal graphs. But if use AC Sweep, DC definitely will be open.  Any idea? Thanks!

I'm trying to understand how oscillators work and am currently working with an RC phase shift oscillator:    $$R_1, R_2, R_3 = 200 \Omega$$  $$C_1, C_2, C_3 = 4.7\text{nF}$$  one of the issues I'm having is that one source states that \$R_{\text{fb}} = 29R\$ for sustained oscillation yet when I set the resistor to \$5.8\text{k}\Omega\$ I get a flat line in nV.   What am I missing out?


It's April 2020 and I am on the WPS Linux page: . I clicked the big blue Download button but nothing happened. I've been searching how to download it through terminal or other ways but couldn't find one. Can someone help?

It's pretty complicated and sometimes the system freezes when I try to download and install wps office. I think it is much more convenient to use the terminal. But I never used installed WPS Office from the command line. That would be great if I could update it using software manager or terminal. Third party deb files are from separate locations. I specifically want to know about WPS


When I press on the "custom" skin then select one of my minecraft skin WHY DOES IT ALWAYS SAY "this is not a minecraft skin, silly". It is really frustrating because everyone has all these awesome and pretty skins and im stuck with boring Alex skin =(

I have a 4th gen ipod. When I try to use a custom skin in Minecraft PE, it tells me, "that's not a Minecraft skin, silly".   It's frustrating because they are real skins. When my younger sister uses her fifth gen ipod to wear the same skins, it accepts them. Can I fix this?


In the question  the OP was seeking a way to append multiple lines to a file within the shell. The solution:  cat <<EOT >> test.txt line 1 line 2 EOT   I want to prepend lines and my attempt looks like:  echo 3 >test.text cat test.text <<EOT >> test.text 1 2 EOT   But this results in an error:  cat: test.text: input file is output file   EDIT: for clarification, I am following a long server setup guide with instructions to manually edit configuration files. Editing at times involves prepending blocks of text to a file. In automating some of the steps, I want to retain the verbosity of the command by copying the text from the guide as-is and putting into a bash one-liner. For this reason the multi-line text input using EOT is preferred.    EDIT: other answers using sed require backslashes to be appended to the end of each line but I want to enter multiple lines without modification.  Is there a way to prepend multiple lines to a file in a similar fashion above (ideally without a temporary file and installing moreutils)?

I need to add PHP tags surrounding a file. It's easy to append them using  find . -exec echo "?>" >> '{}' \;   but how can I prepend the tag <?php?


\begin{figure}[t]\vspace{-1cm} \centering \includegraphics[scale=0.30]{squarew1} \caption{Simulation for $T_1$} \includegraphics[scale=0.3]{squarew2} \caption{Simulation for $T_2$} \includegraphics[scale=0.3]{squarew3} \caption{Simulation for $T_3$} \end{figure}  \section*{Citation} \begin{itemize} \item Decade (log scale). (2021, March 02). Retrieved from \href{https://en.wikipedia.org/wiki/Decade_(log_scale)}{the link} \item Zhang, Q. (2013). Frequency Response of ideal low pass filter. Researchgate.Net. \href{https://www.researchgate.net/figure/Frequency-Response-of-ideal-low-pass-filter_fig5_259436922}{the link} \item Alonso, G. (2020). LTspice: Generating Triangular \& Sawtooth Waveforms. Https://Www.Analog.Com/. \href{https://www.analog.com/en/technical-articles/ltspice-generating-triangular-sawtooth-waveforms.html}{the link} \end{itemize} \end{document}  In the pdf figures appear after citation which I cannot fix.

How to influence the position of float environments like figure and table in LaTeX?   This is a general question and should collect useful answers for all users. I hope we can use this as a reference


closed form for  $$\binom{n}{0}+\binom{n}{3}+\binom{n}{6}+...+\binom{n}{n}$$  I tried to solve it by :   $$\binom{n}{0}+\binom{n}{3}+\binom{n}{6}+...+\binom{n}{n}=\sum_{k=0}^{n/3}\binom{n}{3k}$$  $$\sum_{k=0}^{n/3}\binom{n}{3k}=\sum_{k=0}^{n/3}\frac{1}{2\pi i}\int_{\left |z  \right |=1}\frac{(1+z)^n}{z^{3k+1}}dz$$  then using geometric series but i got no result .  what is your suggest to solve ?

Let $S$ be a set of size $n$.  There is an easy way to count the number of subsets with an even number of elements.  Algebraically, it comes from the fact that  $\displaystyle \sum_{k=0}^{n} {n \choose k} = (1 + 1)^n$  while  $\displaystyle \sum_{k=0}^{n} (-1)^k {n \choose k} = (1 - 1)^n$.  It follows that   $\displaystyle \sum_{k=0}^{n/2} {n \choose 2k} = 2^{n-1}$.    A direct combinatorial proof is as follows: fix an element $s \in S$.  If a given subset has $s$ in it, add it in; otherwise, take it out.  This defines a bijection between the number of subsets with an even number of elements and the number of subsets with an odd number of elements.  The analogous formulas for the subsets with a number of elements divisible by $3$ or $4$ are more complicated, and divide into cases depending on the residue of $n \bmod 6$ and $n \bmod 8$, respectively.  The algebraic derivations of these formulas are as follows (with $\omega$ a primitive third root of unity):  observe that  $\displaystyle \sum_{k=0}^{n} \omega^k {n \choose k} = (1 + \omega)^n = (-\omega^2)^n$  while  $\displaystyle \sum_{k=0}^{n} \omega^{2k} {n \choose k} = (1 + \omega^2)^n = (-\omega)^n$  and that $1 + \omega^k + \omega^{2k} = 0$ if $k$ is not divisible by $3$ and equals $3$ otherwise.  (This is a special case of the discrete Fourier transform.)  It follows that  $\displaystyle \sum_{k=0}^{n/3} {n \choose 3k} = \frac{2^n + (-\omega)^n + (-\omega)^{2n}}{3}.$  $-\omega$ and $-\omega^2$ are sixth roots of unity, so this formula splits into six cases (or maybe three).  Similar observations about fourth roots of unity show that  $\displaystyle \sum_{k=0}^{n/4} {n \choose 4k} = \frac{2^n + (1+i)^n + (1-i)^n}{4}$  where $1+i = \sqrt{2} e^{ \frac{\pi i}{4} }$ is a scalar multiple of an eighth root of unity, so this formula splits into eight cases (or maybe four).    Question:  Does anyone know a direct combinatorial proof of these identities?


How come that $sum$ of $all$ positive integers equal a negative rational number.  $$\sum_{n=1}^\infty n = \frac{-1}{12}$$

$\displaystyle\sum_{n=1}^\infty \frac{1}{n^s}$ only converges to $\zeta(s)$ if $\text{Re}(s) > 1$.  Why should analytically continuing to $\zeta(-1)$ give the right answer?


We all know about tag gold badge. If a user has a tag gold bage, he can close a question under particular tag immediately.  This  is asked under particular tags perl,bash,awk and  user have a tag gold badge for bash. He put the first close vote on that question but it fails to close immediately, Why?

In order to increase the efficiency with which poor quality questions are closed, it could make sense to have weighted close votes for a small subset of qualified users.   A very good way to measure the qualified users would be to leverage the tag badges. However, it needs to be rationally limited to a set of users that are knowledgeable with the subject. A very good way to measure the top users in a tag would be to look at those who have a gold badge in the tag.  If two users who have a gold tag badge pertinent to a question issue a close vote, the question should probably be closed (or probably will be very soon under the current system). I think it would make sense to allow users with a gold tag badge to have a 3x weight for close votes in those tags.  Please keep in mind, this isn't suggesting full moderator one click closure. It only adds weight to the vote. A single user could not do it on their own. These singular users cast close votes all the time, so that aspect would not change. Some will vote to close, some wont, but the ones who do should have a stronger weight to their vote. Even with 3x it will require 2 of said votes to accomplish, or still 2 other users (meaning 3 agreed it should be closed - which is the same amount of high rep users it takes to delete a question and that has a much greater impact than closure).  tldr;  Allow gold tag badge users to have a weighted close vote in their tag


So I've downloaded the "My home is your home" mod so that my chosen followers will stay at my house when I don't need them. Before this mod I did not check if Meeko could leave my service, so I'm unsure if this mod is messing him up.  My two other follers, Sofia (John Jarvis and Christine Slagman) and Garm (Wolfgrimdark), both leave my service and stay where I tell them to. (when I speak to Garm he joins my service automatically, but he'll leave when I ask.) I am also using Meeko reborn to change Meeko to a white husky, so the issue may be related to this mod.   I've tried removing Amazing Follower Tweaks and the option pops up, but he won't join my service anymore. I was trying to get the kids to keep Meeko and apparently they don't recognize that you have a dog with the aft mod enabled, but I've given up on that issue because I can't get rid of him now.  Has anyone else had a similar problem or a fix? *my follower count is 0 and my animal count is 0  Edit: Ok so making a clean save with AFT does work and Meeko stays where I told him to! As long as I never ask him to join me ever again...

I seem to have a little problem as I played through the Dragonborn DLC from Skyrim...  Recently I've run into a problem that's beginning to frustrate me...and that is that I have a Riekling hunter as a pet/follower as well as a custom one. I decided that I no longer needed the Riekling for assistance and wanted to dismiss him. So I went through the dialogue to do that and the message says that "my pet went home" or something like that. Problem is...he still follows me around and the dialogue still treats him as a follower!   I'm using Amazing Follower Tweaks but I'm not sure if AFT also works on Rieklings because I tried uninstalling and reinstalling the mod but that didn't do anything, though trying to play the game without the mod caused some very wierd things to happen like slowing my game down to 1 FPS and having the game kind of flash between low and super high brightness.  I've tried setting the Riekling follower to non-essential and tried the console kill command on him, which didn't work. I also tried to get a dragon to attack him and kill him, that didn't work, he didn't lose any health at all as if he's invincible. My other custom follower works just fine and as intended. I also tried the set playerfollowercount to 0 command that only made my custom follower leave. If anybody asks, I did complete the Thirsk Mead Hall quest.   I don't know what else I can do to try get rid of him. I really don't want to be stuck with him for the rest of my playthrough of Skyrim, but at the same time I don't want to restart the game...  If anybody has any ideas or can help please let me know!


I'm trying to make a bash script that will give me a command that will take a number n as argument and change the directory to the nth directory listed by running ls in the working directory. Here's what I have: #! /bin/bash -        arg=$(ls --group-directories-first | awk -v first=$1 'NR == first' | tr -d '[[:space:]]') cd $arg  It does not work. Nothing happens at all when I run it. The first line does seem to be capturing the directory name in the way that I want. If I change the script to #! /bin/bash -        arg=$(ls --group-directories-first | awk -v first=$1 'NR == first' | tr -d '[[:space:]]') echo $arg  and run it in a directory in which the first directory is bin, the script outputs 'bin' when I give it the argument 1: [user@manjaro ~]$ ls bin/         Desktop/     Documents/   Downloads/   [user@manjaro ~]$ cdn 1 bin  So why does cd not take 'bin' and change to bin when I use the original version? And how should I change it? One final note. When I try to do something similar outside a script it works fine: [user@manjaro ~]$ foo=bin [user@manjaro ~]$ cd $foo [user@manjaro bin]$ pwd /home/user/bin  Again, why?

I want to run a script to simply change the current working directory:  #!/bin/bash cd web/www/project   But, after I run it, the current pwd remains unchanged! How can I do that?


I'm looking for specific examples of all combinations of pure, mixed, separable and entangled states, but I would prefer if they all have some physical significance.  For pure states, the separable ones are the vector states, they are pretty basic and for entangled pure states I thought of the Bell states.  However, I'm having trouble finding examples of mixed states, both separable and entangled, which are simple enough, but aren't completely arbitrarily constructed.  Does anyone have any ideas? Thanks!

I am currently trying to establish a clear picture of pure/mixed/entangled/separable/superposed states. In the following I will always assume a basis of $|1\rangle$ and $|0\rangle$ for my quantum systems. This is what I have so far:   superposed: A superposition of two states which a system $A$ can occupy, so $\frac{1}{\sqrt{2}}(|0\rangle_A+|1\rangle_A)$ seperable: $|1\rangle_A|0\rangle_B$ A state is called separable, if its an element of the (tensor)product basis of system $A$ and $B$ (for all possible choices of bases) entangled: $\frac{1}{\sqrt{2}}(|0\rangle_A|1\rangle_B+|1\rangle_A|0\rangle_B)$ is not a state within the product basis (again for all possible bases). mixed state: Is a statistical mixture, so for instance $|1\rangle$ with probability $1/2$ and $|0\rangle$ with probability $1/2$ pure state: Not a mixed state, no statistical mixture   I hope that the above examples and classifications are correct. If not it would be great if you could correct me. Or add further cases, if this list is incomplete.   On wikipedia I read about      Another way to say this is that while the von Neumann entropy of the whole state is zero (as it is for any pure state), the entropy of the subsystems is greater than zero.   which is perfectly fine. However I also read on wikipedia a criterion for :     Another, equivalent, criterion is that the von Neumann entropy is 0 for a pure state, and strictly positive for a mixed state.   So does this imply that if I look at the subsystems of an entangled state, that they are in a mixed state? Sounds strange... What would be the statistical mixture in that case?  Moreover I also wanted to ask, whether you had further illustrative examples for the different states I tried to describe above. Or any dangerous cases, where one might think a state of one kind to be the other?


Let $R$ be a finite ring with unity. Prove that every $x \neq 0$ is a zero divisor or a unit.  I made an attempt, but got stuck. I took a non-zero $x$ and defined the mapping $f: R \to R, y \mapsto xy$. This mapping may not be injective, but if it is, since it maps from $R$ to $R$ and is finite, $f$ is also surjective, and since $1$ is an element of $R$, there exists $y$ such that $xy = 1$. The ring is not necessarily commutative, however, so I also need to find a $y$ such that $yx = 1$. My thought was to define an analagous map $g: R \to R, y \mapsto yx$, which may or may not be injective. But then I run into problems where the first map is injective, but the second isn't. Any help would be appreciated. EDIT: The linked question does not answer this because it assumes that the ring is commutative. This ring is not commutative.

Let $R$ be a finite ring with unity. Prove that every nonzero element of $R$ is either a unit or a zero-divisor.


Prove the following identify using a combinatorial argument for all positive integers $n$: $${n \choose 0}-{n \choose 1}+{n \choose 2}…(-1)^n{n \choose n}$$ For odd $n$, it's simple enough, we can just use the combinatorial argument for the well known symmetry identity ${n \choose r}={n \choose n-r}$ But I can't think of what to do when $n$ is even, the alternating $±$ makes things weird. Source of problem: Paul Zeitz's The Art and Craft of Problem Solving, $6.1.24$

I came across the following problem in a book:  Give a combinatorial proof of  $$ {n \choose 0} + {n \choose 2} + {n \choose 4} + \, \, ... \, = {n \choose 1} + {n \choose 3} + {n \choose 5} + \, \, ...$$ using the "weirdo" method (i.e., where one of the elements is chosen as special and included-excluded -- I'm sure you get the idea).  After days of repeated effort, the proof has failed to strike me. Because every time one of the elements is excluded, the term would be ${n-1 \choose k}$ and not $ {n \choose k}$, which is not the case in either of the sides of the equation.


Sometimes I get upvote surges, and I want to know which website referred to the question page in question.  Could be done by adding a page filter at:  , although I'd rather also have a date filter for referrals.

There are a number of questions on Programmers' that seem to be getting a lot of traffic:      for example.  I'm curious as to why these questions are getting lots of views, while others aren't. So I'd like to know if anyone has posted a link on Twitter, Facebook, Reddit etc.  Can the referrer urls for individual question be made available to the moderators?  I'm not asking for exact and/or precise information - just the domain would do.  Obviously we'd need the a "most viewed" page in the moderator tools somewhere which would show these questions with a popup or link that showed the referrers for this link. A threshold of some kind for the number of views would probably be required to limit the queries made.  (NOTE: I'm not discussing the quality of said questions).


ESRI Shapefile requires multiple file, such as .shp, .prj and etc.  and it's not preferable for me. So I'm looking for substitute to it.  Are there good file formats which meet the follows ?   Results in a single file Can be loaded by both of QGIS and ArcGIS without any conversions Keep the same kind of information as the ESRI Shapefile (eg. Don't lose info on projection) Don't seem to be deprecated soon Don't get larger size than ESRI Shapefile

I am working on software that is very ESRI oriented, but a future version will likely not be using ESRI software. It uses Shapefiles and Geodatabases. I'm planning on getting all of my data to Shapefiles in anticipation for future versions of the software that will likely be on Android and other mobile devices. It appears that Shapefiles are the most common datatype for features in the open-source GIS world, but what are the others, and what benefits do they bring? I'm familiar with GeoJSON and KML, but I'm sure there are others.  I would like to know all options, but I am particularly interested in dataset types best suited for storing on mobile devices (the data must be accessible without an internet connection).


The commom probability density of the $X$ and $Y$ RVs are as follow: $$f_X(x)=  \begin{cases}     e^{-x}& \text{if } x> 0\\     0,              & \text{otherwise} \end{cases}$$ The question is to estimate the PDF of $XY$. My attempt: $$Z = XY$$ $$f_Z(z) = \int_{-\infty}^{\infty}\frac{1}{|x|}f(x, {z \over x})dx$$ Since given RVs are iid in nature, hence $$f_Z(z) = \int_{-\infty}^{\infty}\frac{1}{|x|}f(x)f({z \over x})dx$$ $$f_Z(z) = \int_{0}^{\infty}\frac{1}{x}\exp\bigg(-x-{z \over x}\bigg)dx$$ Now I'm stuck at this point. How can I solve this integral?

I am trying to define the probability distribution of $Z$ such as $Z = X_1\cdot X_2$ where $X_1$ and $X_2$ are two independent and identically exponentially distributed variables.  $$P(X_1=x) = \lambda e^{-\lambda x}$$ $$P(X_2=x) = \lambda e^{-\lambda x}$$  I tried something like that….  $$P(Z=x) = P(X_1 = a) \cdot P(X_2 = x/a)$$  Is this first equation correct?  $$P(Z=x) = \lambda e^{-\lambda a} \cdot \lambda e^{-\lambda x/a} = \lambda^2 e^{-\lambda (a+x/a)}$$  I doesn't feel like I found the solution as the dummy variable $a$ remains in the final result. Can you please help me solving this problem?


I recall seeing the start of this movie during the early 1990s.  Action takes on a sort of space prison-ship. Prisoners have shaved heads, all dressed in light suits. The guards are wearing sorts of headsets - presumably to protect them from the psychic powers of the prisoners.  There is a bit of "romance" between two of the guards - (a guy and a girl). The guy takes off his headset, the girl insists he puts it back, he insist on having a kiss, she rejects him and goes about her business. He's upset by this and lingers around. The prisoners then use their psychic powers to make him a bit sick and weary - he slumbers around and opens doors of the prisoner cells. The prisoners crawl out. Other guards sound the alarm and shoot at the prisoners, but are overwhelmed.  Prisoners crawl to some sort of central gate and try to open it. The girl from the previous scene escapes the spaceship in a shuttle and lands on Earth - there she is rescued by a nerdy guy. Because she's unaware of Earth morality, she undresses in front of him before having a bath.  The movie had somehow decent visuals and effects, more style, more like Lucas THX 1138 - minimal but with style.

In 1991 or 1992 I saw a two-part (probably made for) TV US movie. It is about an alien starship crash landing on planet Earth (in the USA). An attractive 100% human-looking woman (I believe the only survivor) interacts with our male lead so that they can solve a problem at hand (like communicating with other aliens, or recovering the ship, or working against an alien threat, something like that). She is telepathic and lost her spouse in the space ship wreck (or maybe she just can't ever get back to him because of the broken-down ship?). I remember her flashbacks where she is intimate with her spouse by the touching of hands.  During their time together on earth they fall in love and I believe she stays in the end.  I know this is not much but there aren't that many two-part sci-fi TV movies so someone may remember?


I have a sun lamp at 90 degrees to a curved mesh. In Eevee, the shadow renders as smooth. However, in Cycles, I get these black artefacts - entire faces on the shadow edge are black. How do I fix this? I've played around with the mesh normals, material settings, etc. No luck.  Update I fixed this with Subsurf modifier. Is there a better way?

I'm creating a dune model in blender with cycles and the shadows are kind of messed up. the model is only created from a subdivided plane and then using noise textures. it already has 1.7 million vertices so i don't want to increase the subdivision modifier any more. Do you have any ideas how to make the shadows "softer" without increasing subdivision? Thanks in advance!


I have a website on that ranks pretty good on Alexa, but last week it dropped by 1 millon in rank!  Questions:   Why the sudden drop? How do I improve my Alexa rank?

I don't want to do link exchanges or anything shady. I just want some legitimate ways that I can direct a little bit more traffic to my site. How do I do that?


My text messages are also appearing on my husband's iPhone.  How do I get them to not sync?

My son and wife both have iPod Touches and I have an iPhone. We all used the same Apple ID and turned on iMessage. Both my son and wife were getting texts from my friends and my work on their iPods, I think because my cell phone number was linked to the Apple ID.  If I just turn off iMessage on my iPhone, will that solve the issue?


How can I remove Ubuntu 15.10 from a multiboot computer with windows 10 Ubuntu Kylin and Deepin 2014.3?

I have had the last Ubuntu distro (10.something) installed for a year and love it.  But I have run in to an issue when I tried to upgrade it to the latest one it did not work and there has come some serious issues now with almost everything and I want to remove Ubuntu completely and install the new one.  How can I remove the operating system (I don’t mind formatting the whole thing if that’s what’s needed).


Please tell me how to find the total number of intergral solutions of $a+b+c=n$ I already know that total number of solutions will be $(n+3−1)c(3−1)$.  but if value of $a$ and $b$ and $c$ is given then what will be the answer??

Please tell me how to find the total number of intergral solutions of $$ a+b+c=n $$ I already know that total number of solutions will be $(n+3-1)c(3-1)$.  But what will be the case when a varies from let $2$ to $6$ , $b$ varies from $2$ to $6$, $c$ varies from $2$ to $6$.There can be other conditions also. Please give the generalized result. It will be really helpful.


I'm confused between them. Can someone explain the difference between them? Is $\vec H$ field only relevant during magnetization or demagnetization? $\vec H$ is just that value needed to magnetize/demagnetize or what is it useful for?   Is $\vec H$ only relevant to solenoids or magnets as well? Does it make sense to state a magnet has a field of $0.5~\mathrm T$ and a field strength $\vec H$ of $9\times10^5~\mathrm{ A/m}$?

As per :  "The term (Magnetic Field) is used for two distinct but closely related fields denoted by the symbols $B$ and $H$, where $H$ is measured in units of amperes per meter in the SI. $B$ is measured in teslas in the SI."  So, the two are closely related. Why do we need two, then? Could just one be used? As I remember from the university, for vacuum the Maxwell's equations are written usually in terms of $B$, while for media in terms of $H$ (and $B=\mu H$).


I would like to calculate the response time of the PMOS cicruit in this ciruit.    But I have some troubles about the gate charging. I'm trying to use this:   With the IRF6215   I don't know "which" time should I use in the application note. And how do I do if i don't have Vgp?  Thanks  edit: This question is different from my previous one. Because this new question is focused on how I can applied the application whereas the previous one deals on how to calculate the transient voltage on the load  edit2: Vin1 = 28V and VCMD1 is a pulse in the range of [0;28V] To be more clear, I'm looking into how to do the calculation, instead of how to understand

I would like to calculate the response time of a PMOS circuit and of the circuit  Could you tell me how to do it?    I'm using this transitor.   I tried to use the rise time of the PMOS to find it can switch (and i don't know if that's the good way), but I don't now the results with the load. CL en RL. I assume CL at t=0ms is equal to 0V. I tried to use dv/dt, but I failed VIN1 = 28V. VCMD is a command  Thanks.  edit: I made a mistake. The Zener is also connected to the source. Sorry


...but an office worker has some sort of perceptual shift, and stops following his pattern--wakes up.    Other people keep speaking as though he's replying with the preset line, but he's just listening in horrified silence.  They also move in preset patterns--disrupting their movement makes them have seizures.  Eventually the protagonist meets others who've woken up: a woman whom he likes, as well as a gang of thugs (who have a large/evil hound) who run around pillaging and (I think it's implied) raping the unknowing "machine part" people.  At the end the protagonist and his lady friend decide to rejoin their patterns, by relaxing, dropping back into their routines.    I think it's from the 50s/60s, but I can't for the life of me remember who wrote it, or the title.  I think I might've run across it in an anthology of short stories.  Any help is greatly appreciated!

I vaguely remember reading a short story many years ago where something happens and the protagonist gets a bit "out of step" with the rest of the world.  Everyone else keeps acting as if he's still doing what he would have been doing before the event, to the point of carrying on one-sided conversations and the like.  I can't remember much of the plot, but the premise stuck with me.  Edit: To try and explain it more clearly, based on the comment I just wrote, I think everyone else was effectively acting like they were robots with a prerecorded program.  If someone would normally wake up, drink coffee, put on pants, then walk out the door to catch a bus, then if the protagonist broke his coffee cup, stole his pants, and jammed the door, the victim would pour coffee into a broken/nonexistent cup, walk out pantsless, but when he got to the jammed door he might suddenly realize something was up (and thus being "out of step" spreads) or he might continue to go through the motions.  In either case, no one else would notice that the victim was pantsless (or that he didn't make it to work)...  How much of this actually came up in the story, I don't remember.


How can I add a shutdown button to this menu?  In mine it is missing and I am only able to shut down through terminal. My menu only has lock and logout options, and even the logout option doesn't respond when I click it. I want it to appear like this:

I faced with a problem after update,   I missed 2 buttons from above panel, System menu (including shutdown, suspend & …) and User (including log out & …)  how can I restore them !?...


Hey guys I'm a beginner (sort off) in java and i'm having some trouble. I'm trying to get the date I set in the Budget class with a variable in the Finances class but I keep getting a NullPointerException.  I'm trying to use the dueDate variable in the finances class but the logCat keeps stating that it's a null object reference even after I've instantiated it.  public class Budget {     private Date mDate = new Date();     public static double budgetAmount;      private static Budget instance = new Budget();     private Budget(){      }      public double getBudget(){         return budgetAmount;     }      public void setBudget(double budget){         budgetAmount = budget;     }      public static Budget getInstance(){         return instance;     }       public Date getDate() {         return mDate;     }      public void setDate(Date date) {         mDate = date;     }  }   Here is the Financial Class  public class Finances extends Activity{     int amtFood; int amtCar; int amtGas; int amtTvBill; int amtInBill;     int amtTronics; int amtWear; int amtLight; int amtWater; int amtOthers;      Date nowDate;     Date dueDate = new Date();      double MainAmount = Budget.budgetAmount;     static int SpentAmount;      Budget budgetDate;      public Finances(){         HashMap<String,Integer> amtAdd = ExpenditureLab.get(this).getExpendMap();         int food= amtAdd.get("Groceries/Food");         int car = amtAdd.get("Car servicing");         int gas = amtAdd.get("Gas Money");         int tvBill = amtAdd.get("Television Bill");         int inBill = amtAdd.get("Internet Bill");         int tronics = amtAdd.get("Electronics");         int wear = amtAdd.get("Clothes/Wearables");         int light = amtAdd.get("Light Bill");         int water = amtAdd.get("Water Bill");         int others = amtAdd.get("Others");            dueDate = budgetDate.getDate();     }      public void addSpent(int amt){         SpentAmount += amt;     }  }

What are Null Pointer Exceptions (java.lang.NullPointerException) and what causes them?  What methods/tools can be used to determine the cause so that you stop the exception from causing the program to terminate prematurely?


I want to use gdal_retile. I have gdal installed after installing it from OSGeo4W by my bin folder is missing gdal_retile. How can I install it? I am working on a Windows machine. Is it expected not to be part of GDAL from OSGeo4W? Edit: I can see my question has been closed due to duplication. What I am confused about is how I am suppose to install and use gdal_retile. I found an OLD installation from OSGeo4W which include bat files so I can run it as a command line tool. But that does not seem to be the case anymore? gdal_retile itself is a python script? But then I must run it using python not a command line tool? I am completely stumped in what direction I should go to get it running. If I want to use gdal_retile I assume it is not enough to install just gdal? You can install GDAL in numerous ways  Using the OSGeo4W installer Or binaries from  I am not a computer scientist and there are too many options for me to understand the differences between them and the requirements to get going. I can post a new question if that make more sense.

Can anyone explain how to install GDAL/OGR with Python on Windows?  I have Windows Vista and I have tried following the information on the website and it does not seem to bind the exe files for me.  Can someone describe the process, including links to the files/folders I will need?  I have now tried to run the gdal setup with minGW, but this has also failed:


I have a Dell laptop that runs Windows 10. I also have an empty partition on this laptop's HDD that I want to install Ubuntu there and use it as a dual boot machine. In addition I have Lenovo laptop with Ubuntu on it. I want to clone my Lenovo machine and install this image on the Dell free partition. I found the clonezilla app to clone my Lenovo machine but also read that I need the target disk to be exactly (or more) the size of the original disk. Does anyone knows if it possible to clone my Lenovo machine and install it on the free partition on my Dell's HDD?

My question is simple =)  I am making a clone image using dd on the terminal on my Ubuntu system. I am saving it on external hdd. Now how do I upload that image to my 1 TB HDD thats in my tower. Also should I format that 1TB to EXT4 or NTFS.   Thank you in advance


I need to draw two tangent circles with their common tangent. I drew the first circle centered at C radius CA, the tangent AB. Now I need to find the position of the center for the second circle on the perpendicular to AB. The radius of the circle in question is r=AB^2/(4*AC). The working code is: \documentclass{article} \usepackage{tikz,tkz-euclide} \usetikzlibrary{calc} \usetkzobj{all} \begin{document} \begin{tikzpicture}       \tkzDefPoints{0/0/A, 0/4/C, 5/0/B} \draw (A)--(B); \draw let  \p1 = ($ (B) - (A) $), \p2 = ($ (C) - (A) $), \n1 = {veclen(\x1,\y1)}, %\n1=AB \n2 = {veclen(\x2,\y2)}, %\n2=AC \n3 = {100*\n1/(4*\n2)} %r=100AB/4AC in (C) circle[radius=\n2]  (B) circle[radius=\n3]; \tkzLabelPoint[below](A){$A$} \tkzLabelPoint[below](B){$B$} \tkzLabelPoint[below](C){$C$} \end{tikzpicture} \end{document}  It gives this:  the problem is that number 100 in the code that is supposed to be switched into \n1. But for   \n3 = {\n1*\n1/(4*\n2)} %r=AB^2/4AC  it just doesnt work and says: ! Dimension too large. <recently read> \pgfmath@x  l.14 \n3 = {\n1*\n1/(4*\n2)}                     I can't work with sizes bigger than about 19 feet. Continue and I'll use the largest value I can.  How to fix it and what is the problem? Thanks to everyone.

When I tried to compile:  \documentclass{standalone} \usepackage{tikz} \begin{document} \begin{tikzpicture} \draw[very thin, red] (0,0) circle (2); \foreach \i in {0, 1, 2, ..., 46} \draw[very thin, red] ({360 * \i / 100}:1) circle (1); \end{tikzpicture} \end{document}   I got:  ! Dimension too large. <recently read> \pgfmath@x   l.6 ...thin, red] ({360 * \i / 100}:1) circle (1);  I can't work with sizes bigger than about 19 feet. Continue and I'll use the largest value I can.   And if I turn 46 to 45, say \foreach \i in {0, 1, 2, ..., 45}, that code will pass the compiling.  It seems that some value I was trying to calculate is larger than the TeX engine can handle.   After searching TeX.SX for about half an hour, I got ,  and . These questions have been solved, however, the origin and structure of the problem still remain unclear. Hence, I decide to raise this question: what is the limit (its origin and formation), and how can I avoid it.  Any clues would be appreciated.


What are some good books or papers on statistical mechanics, for someone who:   is familiar with information theory and statistics has a relatively weak physics background (1~2 year undergrad level) wants to learn key techniques in the stat mech literature doesn't care much about physical interpretations of such techniques

I am interested in knowing if some one here knows book/notes for statistical mechanics from the information theoretic viewpoint.  Additional Request from user83014  "Jaynes wrote a paper called Information theory and statistical mechanics (1957). I tried to read this but found it somewhat hard to follow, and I suspect it's because it's one of the earlier works, and that a modern text might be more refined since we've had time to work it out. On the other hand, what I've read from physics textbooks don't explicitly talk about information theoretic concepts like shannon entropy.  "Is there a good modern introduction to the information theoretic view of entropy?"


I am currently building a blog in my area of expertise with a few colleagues. We hope to address answers to lots of frequently asked questions in this field. Is it appropriate/allowed to refer to our blog in a Stack Overflow answer?  I’d obviously port the relevant information across so users can see the base information to answer their question, but for deeper learning link to my blog.  It feels shamefully like self promotion, and I wanted to check before stepping out of line.

I know that putting a link to your blog in a signature is frowned upon and rightly so.  Is it okay to link to your blog in an answer if that blog post answers the question?  Are there other situations where it would be acceptable to promote your own web site in a question or answer?  Related:


The following code is used to check variable type and filter array   const filter = (predicate, xs) => xs.filter(predicate) const is = (type) => (x) => Object(x) instanceof type filter(is(Number), [0, '1', 2, null]) // [0, 2]   Q1: I don't understand what the usage of Object(...), what does it return? if I directly use x, the code doesn't work  const filter = (predicate, xs) => xs.filter(predicate); const is = (type) => (x) => x instanceof type; filter(is(Object), [0, '1', 2, null]) // [];   Q2: the value returned by Object(...) is instance of Object and Number/String, why is that?     Object('1') instanceof String && Object('1') instanceof Object;//true Object(2) instanceof Number && Object(2) instanceof Object;//true typeof Object(2) //"object"   It really confuses me a lot, thanks for your support!

Just curious:    4 instanceof Number => false new Number(4) instanceof Number => true?   Why is this? Same with strings:    'some string' instanceof String returns false new String('some string') instanceof String => true String('some string') instanceof String also returns false ('some string').toString instanceof String also returns false   For object, array or function types the instanceof operator works as expected. I just don't know how to understand this.  [new insights]  Object.prototype.is = function() {         var test = arguments.length ? [].slice.call(arguments) : null            ,self = this.constructor;         return test ? !!(test.filter(function(a){return a === self}).length)                : (this.constructor.name ||                   (String(self).match ( /^function\s*([^\s(]+)/im )                     || [0,'ANONYMOUS_CONSTRUCTOR']) [1] ); } // usage var Newclass = function(){};  // anonymous Constructor function var Some = function Some(){}; // named Constructor function (5).is();                     //=> Number 'hello world'.is();           //=> String (new Newclass()).is();        //=> ANONYMOUS_CONSTRUCTOR (new Some()).is();            //=> Some /[a-z]/.is();                 //=> RegExp '5'.is(Number);               //=> false '5'.is(String);               //=> true


I wqant to add a wifi thermostat to a millivolt system. I would like to keep the current thermostat in case of power lost so that it would kick in at a minimum temp say 45 degrees. How do you wire a thermostat in parallel? Thanks

I have a venter room heater in a cabin. It uses a milivo;t thermostat. I am hooking it up to a wifi thermostat using a relay and 24 volt power supply. My concern is that if the power goes off that the thermostat will not power the unit on. I currenty have a digital thermostat that controls the unit and works great. can I wire the current thermostat to the wifi in parallel so if power goes off it will still allow the heater to turn on. If I can how do I wire it?


Suppose you are an instructor and you have given a (midterm or final) exam. This is a substantial portion of the grade; a student who misses it has little chance of passing the class. (I have in mind a college course, but maybe this a question in high school as well.)  Suppose that a few students don't show up for the exam. Of course, if the students were ill or had personal emergencies, you would like to give them a chance to make up the exam. You send them an email after the exam, but hear nothing back for a few days.  After those few days, you grade the rest of the exams, and would like to return them to the class and post solutions online so that your students can learn from their mistakes  However, if any of the students who missed the exam will later ask for a makeup, then they will have the advantage of seeing the solutions. While you certainly wouldn't give them an identical exam, it seems like this would still be a substantial advantage.  What is the fair thing for you to do here?  EDIT:   I thank Peter K. for commenting. However, the referenced question is about a quite different situation; it has nothing to do with discussing or posting solutions for the rest of the class.

I have a student who failed an exam I gave three months ago and was supposed to show up for a remediation exam this week. The date was announced long in advance, and the student neither showed (all the others did show up) nor warned me. Now, she is asking for a new exam date, saying she was absent due to “medical reasons”. She produced a certificate that she was seeing a doctor at the time, but nothing indicates that it was an urgent need (rather than, say, a scheduled appointment).  How would you handle such a case? I asked the administrative staff at my institution, and they told me to proceed as I saw fit. Should I ask a more specific justification? In what form?


I'm trying to understand how to store a character in a char variable and print it immediately on the screen right after it has been typed by a user. The user shouldn't press the enter key.  Edit: I'm using Linux.

I can never remember how I do this because it comes up so infrequently for me. But in C or C++, what is the best way to read a character from standard input without waiting for a newline (press enter).  Also ideally it wouldn't echo the input character to the screen. I just want to capture keystrokes with out effecting the console screen.


If $z_1,z_2,z_3 \in \mathbb{C}$ and $|z_1|=|z_2|=|z_3|$ and $z_1+z_2+z_3=0$. Prove that $z_1,z_2,z_3$ are points of a isosceles triangle that is on a unit circle with the center in the coordinate beginning.  The answer is given in the following manner:$$z_1=|z_1|e^{i\varphi_1}\\ z_2=|z_2|e^{i\varphi_2} \\ z_3=|z_3|e^{i\varphi_3}\\ |z_1|=|z_2|=|z_3|=|z|$$ It goes on to state that this needs to be true, which I understand why: $$|z_1-z_2|=|z_2-z_3|=|z_3-z_1|=\sqrt{3}|z|$$ and then finding $$|z_1-z_2|=....$$  $$2|z|\left|\sin\left(\frac{\varphi_1-\varphi_2}{2}\right)\right|=2|z|\left|\sin\left(\frac{ \pi }{3}\right)\right|????$$  How can we assume this??

Suppose $a,b,c$ lie in the unit circle of the complex plane and satisfy $a+b+c = 0$. Then, $a,b,c$ form the vertices of an equilateral triangle. Try So, I want to show that $|b-a|=|c-a|=|b-c|$. We are given $|a| = |b| = |c| = 1$ and $a+b+c=0$. Since $|z| = z \overline{z} $, we have $$ (b-a)( \overline{b}-\overline{a} ) = (c-a)( \overline{c} - \overline{a} )$$ which simplifies to $$ |b| - b \overline{a} - a \overline{b} - |a| = |c| - c \overline{a} - a \overline{c} - |a| $$ Hence, $$ c \overline{a} + a \overline{c} - b \overline{a} - a \overline{b} = 0$$ $$ a( \overline{c} - \overline{b} ) + \overline{a} ( c-b) = 0 $$ Here I am stuck. Perhaps this is the wrong approach?


Given $A,B$ symmetric positive semidefinite matrices of equal size it is clear $A^2,B^2,(A+B)^2,A+B$ are all symmetric positive semidefinite.  However is $2AB$ symmetric positive semidefinite?

I see on Wikipedia that the product of two commuting symmetric positive definite matrices is also positive definite. Does the same result hold for the product of two positive semidefinite matrices?  My proof of the positive definite case falls apart for the semidefinite case because of the possibility of division by zero...


To define mathematical objects, it seems one defines them in terms of other mathematical objects.  However various mathematical objects have different "definitions".  E.g. it seems people "construct" the real numbers (they use objects other than the real numbers, to create an algebraic structure isomorphic to what others consider the real numbers) and then define those as the real numbers. Yet this appears ambiguous to me.  If one were to refer to the "real numbers" would they then be referring to Dedekind Cuts?   Or would they be referring to equivalence classes of Cauchy Sequences?  Or to some other "construction" entirely?     Here are my best two guesses as to what people mean:  $1.$ They are simply referring to any structure isomorphic to the (unique) complete ordered field.  $2.$ They are referring to an equivalence-class$^{*}$ of all structures that are isomorphic to the (unique) complete ordered field.  $*\small(\text{Not an equivalence class in the proper sense with sets as an such object cant be a set by Russell's paradox)}$  The reason $1$ would not result in ambiguity is because we often never need to make use of their original "definitions" per se. Because we can embed the rationals, integers etc. inside the real numbers. However $2$ would avoid this problem entirely as we have only a single definition.

I've found lots of resources that say this is a real number if it's not rational, but what is a real number, really?  I mean what is the definition of a real number?  If nothing else, anyone know of a resource where I could find out myself?  Thanks!


The number $e$ is characterized in calculus as:   $$e:=\lim_{n\to\infty}\left(1+\frac1n\right)^n$$  My question is this: As $n$ heads to infinity, $1/n$ gets closer and closer to zero. So what we're really doing is to add $1$ to a number that's getting closer and closer to zero and then raising that expression to an increasingly large number.   So, the limit as $n$ moves towards infinity is $1$. Why is it $e$?

If I were given $\lim_{n\to \infty}(1 + \frac{1}{n})^n$, and asked to solve, I would do so as follows:  $$\lim_{n\to \infty}(1 + \frac{1}{n})^n$$ $$=(1 + \frac{1}{\infty})^\infty$$ $$=(1 + 0)^\infty$$ $$=1^\infty$$ $$=1$$  I'm aware that this limit is meant to equal to $e$, and so I ask:     why don't I get $e$ when I solve $\lim_{n\to \infty}(1 + \frac{1}{n})^n$?


There are circular (trig) functions which determine all the points on a unit circle:  and which relate to the area swept out by an angle subtended on the circle. -- These functions can of course be extended to relations to ellipses as well.  There are also hyperbolic functions which determine all the points on a hyperbola:   My question is why there are no analogs of these functions for parabolas (the other type of conic section):  Here I have defined $\mathrm {sinp}(\theta)$ and $\mathrm {cosp}(\theta)$ to be the x- and y-coordinates of points on a "unit parabola".  Is there any good reason why we should have these extremely useful transcendental functions (sin, cos, sinh, cosh, etc), but we can't (or don't) define analogous functions for parabolas?    NOTE: I recommended that this post get deleted because Henning's response in  explained theoretically why a "parabolic trigonometric function" is different than the circular and hyperbolic trigonometric functions.  However johannesvalks' answer to this was very interesting, as well, and probably shouldn't be deleted.

The parametric equation  $$\begin{align*} x(t) &= \cos t\\ y(t) &= \sin t \end{align*}$$  traces the unit circle centered at the origin ($x^2+y^2=1$).   Similarly,   $$\begin{align*} x(t) &= \cosh t\\ y(t) &= \sinh t \end{align*}$$  draws the right part of a regular hyperbola ($x^2-y^2=1$).  The hyperbolic trigonometric functions are very similar to the standard trigonometric function.  Do similar functions exist that trace parabolas (because it is another conic section) when set up as parametric equations like the above functions?  If so, are they also similar to the standard and hyperbolic trigonometric functions?


I'm trying to simply delete the closest li.  It works if I simply do:
Teste
  There is no errors in the console. The problem is that my li is generated then the user does something (in this case when clicks a button) Because of that the method is never triggered and li never dissapears.  How my $("a[id^='delete-']").click(function() can run after the li is generated?    $(document).ready(function() {    //delete testCase row when click delete button   $("a[id^='delete-']").click(function() {     console.log('clicked');     $(this).closest('li').remove();   });    var table = $('#dataTable').DataTable({     buttons: [{       text: 'Add test case(s)',       action: function() {         var testCaseName;         var data = table.rows({           selected: true         }).data();         console.log(data);         $.each(data, function(index, value) {           console.log(value[1]);           testCaseName = value[1];           $('#testCaseList').append('
' + testCaseName + '</button>
')         });       }     }]   });  });  <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">

I have a bit of code where I am looping through all the select boxes on a page and binding a .hover event to them to do a bit of twiddling with their width on mouse on/off.  This happens on page ready and works just fine.  The problem I have is that any select boxes I add via Ajax or DOM after the initial loop won't have the event bound.  I have found this plugin (), but before I add another 5k to my pages with a plugin, I want to see if anyone knows a way to do this, either with jQuery directly or by another option.


I want to install a Windows version on a USB flash drive from Ubuntu. How can I do it and which version of Windows should I choose?

I want to burn a Windows ISO to a USB device in Ubuntu. How do I do this?   I know how to burn a Ubuntu ISO into a USB device, but with a Windows ISO it's not the same.


There are many posts, votes and answers indicating using lock (this) is not a recommends pattern (not to mention a bad one).  Have a look at , for example.  As I'm trying to investigate this pattern a little bit, and wanted to ask whether anyone someone can think of a scenario in which using lock (this) is actually recommended, or even a must?

The  says that public class SomeObject {   public void SomeOperation()   {     lock(this)     {       //Access instance variables     }   } }  is "a problem if the instance can be accessed publicly". I'm wondering why? Is it because the lock will be held longer than necessary? Or is there some more insidious reason?


I have a shapefile of landcover.  It was developed from a raster dataset (the Crop Data Layer).  I also have a grid of 50x50m cells (polygons in a shapefile) I have overlain on the landcover shapefile.  It's only a subset of 1 county at this point, so it's not too terribly large.    I want to give an attribute to each cell that corresponds to the largest landcover category underneath.    I would prefer to do this with the shapefiles, as I made several modifications to the shapefile after converting it from the raster.  But if it can only be done with a raster, then I'll take that route.    I have tried spatial joins and the update overlay tool in vector data.  I have tried to take raster data, convert it to point data, then to raster, then back to polygon, but doing that you lose the habitat code for the data.

First, I have a shapefile consisting of square grids and each grid has an ID. Second, I have a shapefile consisting of different zones (with IDs).  A grid ID in the first shapefile can contain many zone IDs from the second shapefile.  I want to know what is the dominant zone ID inside a grid and record that in a table. I only want to know the dominant zone (in terms of the area) and not the rest of the zones intersecting that grid. In the end, I would want a 2-column table with all the grid IDs in the first column and the corresponding dominant zone ID (or the largest zone in terms of area) in the second column.  Here is a sample figure.  By just looking at the figure, I could tell that in Grid ID 1, the dominant zone/area is Zone ID 1.  In Grid ID 2, the dominant zone/area is Zone ID 2.  And in Grid ID 3, the dominant zone/area is Zone ID 3.  I would like to have a table with two columns, with each grid showing only the ID of the dominant area.


I am writing a program for a school assignment to create one string array of 3 riddles and another string array of 3 answers to each riddle. However when I input the correct answer to the riddle it keeps on showing the else part of the if-else statement. Here's my code:  import java.util.Scanner; import java.util.Random; public class riddleProgram { public static void main (String[]args) { Scanner input = new Scanner(System.in); Random rand = new Random();  int index; int chosenRiddles = rand.nextInt(2);   //declares the riddles in the program as well as choosing a random riddle from the three presented String[]riddle = new String[3];  riddle[0] = "What starts with a T, ends with a T, and has T in it?"; riddle[1] = "The day before two days after the day before tommorrow is Saturday. What day is it today?"; riddle[2] = "What grows up while growing down?";  //declares the answers to the riddles String[]answer = new String[3]; answer[0] = ("teapot");  answer[1] = ("friday"); answer[2] = ("goose");  //asks user to enter guessed answer for the randomly presented riddle for (index=0; index<3; index++); {   System.out.println(riddle[chosenRiddles]);   System.out.print("Enter your answer for the presented riddle (lowercase): ");   String inputtedAnswer = input.nextLine();    //if user inputs right answer, congratulates user  //if user inputs incorrect answer, tells user the correct answer   if (inputtedAnswer == answer[chosenRiddles]) {      System.out.println("Congratulations, you have gotten the right answer!"); }   else {     System.out.println("Sorry you had the wrong answer. The right answer is " + answer[chosenRiddles] + ".");} }  }  }

I've been using the == operator in my program to compare all my strings so far. However, I ran into a bug, changed one of them into .equals() instead, and it fixed the bug.  Is == bad? When should it and should it not be used? What's the difference?


I'm sure there are several misconceptions here and I'd greatly appreciate it if someone could help me identify and correct them.  When calculating tidal forces across an object, the earth for example, why does one neglect the gravitational force due to the mass of that object (the earth) and instead only consider the force due to the moon's mass?  To clarify, I am wondering why one does not consider the differing force of attraction between different point on (and within) the earth when calculating the tidal effects due to a satellite.  Here is the situation in which I'm trying to understand tidal forces:  The earth and the moon, some distance apart (but "fixed" in space, i.e. not orbiting each other and not accellerating toward each other). From what I've read, this situation should produce tidal bulges in both the near and far oceans.   Here is what I'm thinking:  On the point of earth's surface closest to the moon, the net force on that point mass is the sum of the force of the earth's gravity on that point and the force of the moon's gravity on that point.   At the center of the earth there is no net force due to earth's gravity so the net force is toward the moon  On the point furthest from the moon, the forces of the earth and the moon on that point are in the same direction (toward the moon)  I fail to see how this produces tidal bulges on opposite sides of the earth.  It seems to work out correctly if one only considers the forces on the points due to the moon's gravity, but I don't understand why you're allowed to disregard the earth's gravity.  I feel that if I understood this quote from the link below, it may shed some light on the issue:  "Since we have taken the near-spherical earth as a baseline, and the tidal effects are superimposed on that, we can ignore the earth's own gravitational forces on itself, leaving only the forces due to the moon. They are the forces causing tidal effects."

The bit that makes sense – tidal forces My physics teacher explained that most tidal effect is caused by the Moon rotating around the Earth, and some also by the Sun. They said that in the Earth and Moon system, the bodies are in freefall about each other. But that points on the surface of Earth, not being at Earth's centre of gravity, experience a slightly different pulls towards the Moon. The pull is a little greater if they are on the Moon's side, and slightly lesser if they are on the side away from the Moon. Once freefall is removed, on the Moon side this feels like a pull towards the Moon and on the the opposite side it feels like a repulsion from the Moon. This makes sense to me, and is backed up by other questions and answers here, like  and also  Phys.SE question. The bit that doesn't make sense – tidal bulges They also said that there are "tidal bulges" on opposite sides of the Earth caused by these forces. The bulges stay still relative to the Moon and Earth rotating through the bulges explains why we get two tides a day. They drew a picture like this one…  An image search for  finds hundreds of similar examples, and  from a scientist on Twitter. …But, if there is a tidal bulge on both sides of Earth, like a big wave with two peaks going round and around, how can an island, like Great Britain where I live, simultaneously have a high tide on one side and a low tide on the other? For example:   on the West coast  on the East  Two ports with tides 6 hours, or 180º apart. It's high tide at one while low tide at the other. But they are only  by road. Great Britain is much smaller than Earth. It's probably not even as big as the letter "A" in the word "TIDAL" in that picture.  To prove this isn't just Britain being a crazy anomaly, here is another example from New Zealand:     Two ports that are 180º (6 hours) apart, but separated by  through a national park. New Zealand, unlike the UK, is in fairly open ocean.


I want to get off the old ink and all the white specks and still keep the plates safe.

I have an old metal engraved plate of a picture of my family that was used by the newspaper back in the 1950's.  Unfortunately, it has a lot of white type spots of some kind of powder/crystal growth over some of the photo.  Is there anyway that I can safely clean the photo plate?


How to use adjective and adverb correctly without being confusing. In this case because when I translate this sentence from my mother language to English, it fairly seem to be the same. Please help me. Thanks in advance         Cable cars are environmental friendly.   Cable cars are environmentally friendly.

"Environmentally-friendly" sounds completely normal to me. So does "Environment-friendly". But I'm pretty sure I favour the former (despite the fact that I normally prefer the shorter of any two equivalent terms).  According to Google, I'm in good company. At least, the 'allies' massively outnumber those who say "Environment-friendly".  Why is this? Environment seems like a straightforward noun. All the other -friendly constructions I can think of just bolt on to the uninflected noun...  User-friendly software, Gay-friendly bar, Dolphin-friendly tuna, etc.  I hesitate to ask "What's so special about the environment?", but there it is being asked.  Later... Note that my focus is on why the inflected form apparently 'just happens' to be used with environment, but not with other nouns.


just a few days ago i purchased a dell inspiron laptop with pre-installed ubuntu 14.04 LTS. i was installing the software center and updating in the software updater and it was just completed upto 85% and then  it's just goes unresponsive . after this i tried to shutdown but it won't so i just forcefully shutdowned using the power button.when i restarted it's showing a black screen and it's showing the following-              GNU GRUB version 2.02~beta2-9ubuntu1.3   Minimal BASH-like line editing is supported.for the first word,TAB   lists possible completion. Anywhere else TAB lists possible device or file completion.  grub>_   please help me to step forward!

I did a fresh install of ubuntu 11.04, then I installed Windows 7. So I decided to fix the grub after win7 install using the ubuntu 11.04 Live CD.  Disaster:  instead of  $sudo grub-install --boot-directory=/media/uuid/ /dev/sda  I entered  $sudo grub-install --root-directory=/media/uuid/ /dev/sda  Now when my system boots, it stops at the grub console  grub>  My problem is exactly as this one  but I have not been able to fix my problem. Thanx for your help.


In Pokemon Alpha Sapphire I caught Mesprit, encountered Azelf, but I haven't seen or caught Uxie. I have seven gym badges, and I want to get Lugia. Can somebody tell me how to get Lugia without having it take several hours?

There are a lot of legendaries available in ORAS, however a lot of them will only show up/be available if certain prerequisites are met.  I know Groudon/Kyogre are available through the Story, and      Rayquaza & Deoxys   through the postgame Delta episode, but what about the other available legendaries? What do I need to do to catch them?


I need advice regarding cameras very easy to use and possibly impact resistant. A friend of mine, who is a very enthusiastic photographer because of an accident now has a severe disability. He can not use his right hand, and he has difficulty, more generally, in doing complex movement with the left one. I would like to buy a new camera for him that would be very easy to use. For instance, I'd like a camera with very few buttons and a larger "screen". Do anyone know if such a camera exists for disabled users or even for children? Do you have any advice on where to search for cameras with support for disabled people?

The back-story: My father-in-law, who was an active film SLR user earlier in his life, suffered a series of strokes several years ago. He lost most of his ability to speak, and cannot use his right side (he has no fine motor skills at all in his right hand), and has limited mobility as a result. He uses a wheelchair but gets around his care facility just fine. Despite the communication barrier, he manages to get across the gist of what he's after most of the time (and while he can't speak, he's a Marine, so he can still swear at you ;-).  What we're after: We'd like to help him be able to shoot the world around him again. He lives in a facility with plenty of accessible indoor and outdoor spaces, and he has free roam of the place each day. A great environment for capturing unexpected surprises in photographs.  The constraints we're working with: His wife visits regularly and can take care of processing (transferring to computer, printing, etc), but isn't strongly tech or photo savvy, so any solution has to take her skill level into account. He'll have difficulty using anything without a simple user interface; half-presses of the shutter might be a problem, a viewfinder (rather than an LCD) may pose a problem, and it must be operable with his left hand. Also, due to his environment, the ability to easily clean (or even better, seal) the unit would be helpful. Finally, as anyone who has a loved one in a care facility knows, theft can sometimes be an issue, so this needs to be something he can take with him in his chair; bulky solutions will end up being left behind and "misplaced".  So, with that in mind:   Can anyone recommend a camera manufacturer that caters to lefties, or even better, specifically to the handicapped? Cost is a consideration, but a low one; we're much more interested in finding something that meets his needs. If anyone has specific experience with this kind of situation or equipment use case, can you share how it went for you? What worked, what didn't, things that would have been good to know?


Im trying to estimate pi, the first term in the series is correct the second is -1 instead of -4/3. then just zeros im sure my closed form for the sequence is right i just cant figure out where im going wrong...   #premise for this problem: #working from the starting point of a tayler expansion of 1/(1-x)  #Start with 1/(1+w) = 1 - w + w2 - w3 + ... #Now substitute x2 for w: #1/(1+x2) = 1 - x2 + x4 - x6 + ... #Then integrate both sides (from x=0 to x=y): #arctan y = y - y3/3 + y5/5 - y7/7 +... #and plug in y=1, to get # Pi/4 = 1 - 1/3 + 1/5 - 1/7 + ... from math import * import numpy as np  n= 100 #define range x= 1   #define range series = [] # define our series expantion Pi/4 = 1 - 1/3 + 1/5 - 1/7 + ... for u in range(0,n):     if ((u %2)==0): #if even r=positive         r=1     else:         r=-1        #else r=negitive     d= (1+(u*2))     value = ((4//d)*r)     series.append(value)  sumseries= sum(series) #sum the series print (sumseries) print 'error in pi is', (sumseries/pi)*100, '%' print series

Is there a benefit to using one over the other? In Python 2, they both seem to return the same results:  >>> 6/3 2 >>> 6//3 2


I have source code run by tomcat use ajax get data.
             Search: <input type="text" class="search" id="searchBox"/>

            When i get data for id= display . Code html like that:
                 Search: <input type="text" class="search" id="searchBox">

                     Demo&nbsp;1
2010-2015

                     Demo&nbsp;2
2010-2015

                     Demo&nbsp;3
2015-2015

   But when i check in browser function  $(".display_box").click(); not work when i click div tag id=display_box. I don't understand why? Solution about this? Somebody help me!

I have a bit of code where I am looping through all the select boxes on a page and binding a .hover event to them to do a bit of twiddling with their width on mouse on/off.  This happens on page ready and works just fine.  The problem I have is that any select boxes I add via Ajax or DOM after the initial loop won't have the event bound.  I have found this plugin (), but before I add another 5k to my pages with a plugin, I want to see if anyone knows a way to do this, either with jQuery directly or by another option.


to forgive is a great value Forgiveness is a great value Forgiving is a great value  Does meaning change ? And why ? Grateful to your help

Could anyone explain when to use a noun or a gerund?  Are these sentences correct? What is the difference between usage of gerund and noun there?        I worked on the improvement of the article.   I worked on the article improving.   I worked on the improving of the article.                The investment idea was published.   Investing idea was published.


I am little confused about an instruction I came across. It stated "put the file in your path". I interpreted that as to add  PATH=$PATH:'~/.conkystart'   to my ~/.bashrc. The file is ~/.conkystart   #!/bin/bash conky -c ~/.conkyrc2   and ~/.conkyrc2 is a second conky fig file.  However, when I restarted, the second conkyrc file didn't execute and there were no errors in the bash terminal. Am I interpreting "put the file in your path" incorrectly? If so, what should I have done instead?  The end game is for ~/.conkyrc2 to execute on boot.

I am trying to install something and among the steps there was this one:  "Place it on your $PATH"  What does this mean? What is that?  I have searched both this site and on Google but everyone just takes it for granted!


I'm writing a headline for an article ending with "outside the organization."  According to our style book, we capitalize on headline.  Should "outside" be capitalized in this context?

Are there any concrete rules that say which words (parts of speech) in a title should start with a capital letter? What would be a correct capitalization for the title of this question?


My brother and I got a PS4. we created two separate profiles and found out that for online gaming, PS plus is required.   We can buy a PS Plus subscription for a year but not sure if that subscription will be for both of us? Both accounts have their own PSN accounts.   Can I also transfer a profile from one PSN account to another one?

I bought the season pass on the playstation store accidentally on my brothers user, I meant to purchase on my user. Does this even matter, or will it work on both users? How do I know if its even installed?


I set up Gmail to add a POP3 and SMTP server for sending mail. Whenever I get mail to that new address though, and I press on reply it still tries to reply by default by using my @gmail.com address.    Is there a way that when I get mail to that new POP3 account, that it will auto select the associated SMTP account?

In short: In Gmail, is there a way to let the "send from" address change automatically depending on which of my accounts it was sent to?   In long:  I recently joined a team (of developers) and they provided me with an email address on their domain (for if I have business with a client or something).    Anything sent to me@team.com is forwarded by the team.com mail server I'm using Gmails "send mail as" functionality to send email through smtp.team.com. I receive emails and I can send them, so that works I have my default "send as" address setup as me@Gmail.com, which I would like to keep since I send 90% of my mail through there.   Now I'm wondering how to do the following, if at all possible:   when I receive an email at me@team.com (as opposed to me@Gmail.com), and I reply to it, my "send as" address will change automatically to me@team.com I can do it manually, but I know I'm going to forget sooner or later, confusing the hell out of people since the team lets me use a pseudonym.   I hope my question makes sense, and I'm sure it's easily answered by a "no, not possible" or "yes, option X in tab Y".


Let $f:X \to R$ with $f(x) \ge 0$ for $x \in X$. Show that if $\sum_{x \in X} f(x) < {\infty}$ then the set $\{x / f(x) \neq 0 \}$ is countable  Could anyone help me to show this?

Claim: If $(x_\alpha)_{\alpha\in A}$ is a collection of real numbers $x_\alpha\in [0,\infty]$ such that $\sum_{\alpha\in A}x_\alpha<\infty$, then $x_\alpha=0$ for all but at most countably many $\alpha\in A$ ($A$ need not be countable).  Proof: Let $\sum_{\alpha\in A}x_\alpha=M<\infty$. Consider $S_n=\{\alpha\in A \mid x_\alpha>1/n\}$.  Then $M\geq\sum_{\alpha\in S_n}x_\alpha>\sum_{\alpha\in S_n}1/n=\frac{N}{n}$, where $N\in\mathbb{N}\cup\{\infty\}$ is the number of elements in $S_n$.  Thus $S_n$ has at most $Mn$ elements.   Hence $\{\alpha\in A \mid x_\alpha>0\}=\bigcup_{n\in\mathbb{N}}S_n$ is countable as the countable union of finite sets. $\square$  First, is my proof correct? Second, are there more concise/elegant proofs?


Are there any dubbed episodes of Naruto Shippuden after episode 388? And if so are they continuing dubbing episodes?  I have looked everywhere and couldn't find anything.

I would like to know how many episodes of Naruto Shippuden are dubbed because I've only seen about 388 in all my anime streaming websites?


Our presence in the universe is something too bizarre for words. The mundaneness of our daily lives cause us take our existence for granted — but every once in awhile we're cajoled out of that complacency and enter into a profound state of existential awareness, and we ask: Why is there all this stuff in the universe, and why is it governed by such exquisitely precise laws? And why should anything exist at all?

A simple but fundamental question.    The "something" means the whole Universe (known and unknown), it could be represented as the reality version of the set of all sets, which is itself . It includes all the  and such.  A better version of the whole Universe could be described with a .  The "nothing" means an absence of the whole Universe, not a particular void or emptiness in the whole Universe but a nonexistent whole Universe.


I want to show the names of the tables I have in my SQL Server database in a listbox using vb.net.  I tried this but it's not working:   connetionString = "Data Source=ABDELOUAHED;Initial Catalog=table_creances;integrated security=true"  connection = New SqlConnection(connetionString)   sql = "select * from table_creances"   Try         connection.Open()         adapter = New SqlDataAdapter(sql, connection)         ds.Clear()         adapter.Fill(ds)         connection.Close()         ListBox1.DataSource = ds.Tables(0)     Catch ex As Exception         MsgBox(ex.ToString)     End Try   table_creances is the name of my database.  Any help is very appreciated.

What is the best way to get the names of all of the tables in a specific database on SQL Server?


I have a Zip archive containing a single password-protected file file.txt.  The encryption is "ZIP 2.0 Default Encryption" (ZipCrypto).  I know what kind of text (sentences) the "file.txt" contains.    Is it possible to use known-plaintext in that case? Or, Do I need exactly a second known encrypted file to use this type of attack?

I have an old sourcecode backup from my DOS days stored in a ZIP 2.0 encrypted archive, but I lost the password.  The password was written on a paper slip, but I remember that it consisted of 30+ completely random alphanumeric characters with some special symbols in between.  I have read that a GPU cluster will crack old ZIP 2.0 archives almost instantly, and that there is a vulnerability in the ZIP 2.0  encryption allowing an attacker to recover the password instantly if there are multiple files in the archive.  But what if there is only one file in the archive, and the password consists  of 30  completely random characters?  Can I expect fast recovery if I can run the process on a GPU cluster?    Addition: The archive was created with PKZIP 2.04C and there is nothing known about the filename extension and nothing known about the plaintext.  Does it change the calculus that the archiver was 2.04C and not 2.04G?


Im trying to update from 19.10 to latest Ubuntu, but im getting the following error: ~ # apt upgrade -y Reading package lists... Done Building dependency tree        Reading state information... Done Calculating upgrade... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation:  The following packages have unmet dependencies:  libsensors-config : Conflicts: libsensors4 but 1:3.4.0-4 is to be installed E: Broken packages  Any suggestions on how to fix this?

After upgrading from 10.04 to 12.04 I am trying to install different packages.  For instance ia32-libs and skype (4.0).  When trying to install these, I am getting the 'Unable to correct problems, you have held broken packages' error message.   Output of commands:  sudo apt-get install -f Reading package lists... Done Building dependency tree        Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.   After running this:  sudo dpkg --configure -a foo@foo:~$ sudo apt-get install -f Reading package lists... Done Building dependency tree        Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.


I am trying to write a paper that requires the references to be done exactly in the APA style.  At the moment I am using natbib, and I get the following results:  Beall, J. C. and Restall, G. (2006). Logical Pluralism. Clarendon Press, Oxford.  Becker, K. (2012). Methods and How to Individuate Them. In Becker, K. and Black, T., editors, The Sensitivity Principle in Epistemology, pages 81--97. Cambridge University Press, Cambridge.  Dutilh-Novaes, C. (2015). A Dialogical, Multi-Agent Account of the Normativity of Logic. Dialectica, 69(4):587--609.  But what I need is:  Beall, J. C. & Restall, G. (2006). Logical Pluralism. Oxford: Clarendon Press.  Becker, K. (2012). Methods and How to Individuate Them. In K. Becker & T. Black (Eds.), The Sensitivity Principle in Epistemology, pp. 81--97. Cambridge: Cambridge University Press.  Dutilh-Novaes, C. (2015). A Dialogical, Multi-Agent Account of the Normativity of Logic. Dialectica, 69, 587--609.  Switching to apacite does not seem to help. I've seen a few people suggest biblatex-apa, but I'm not quite sure how this will work with natbib (I also use Mendeley to produce the library.bib file, if that's important). I am quite new to LaTeX, so an answer spelling what I need to do containing as little jargon as possible would be immensely appreciated!

I am really new to LaTeX and I need a comprehensive solution for my Thesis  I have this problem since two days and I couldn't find any solution in any other post.  I work with BibDesk on Mac  And I used Packages apacite and natbib  @article{Ha89, Author = {Peter M. Haas}, Date-Added = {2017-02-06 21:15:57 +0000}, Date-Modified = {2017-02-06 21:45:06 +0000}, Journal = {International Organization}, Lastchecked = {03/02/2010 12:54}, Number = {3}, Pages = {377-403}, Publisher = {Peter Haas}, Read = {0}, Title = {Do regimes matter? Epistemic communities and Mediterranean pollution control}, Urldate = { http://www.jstor.org/stable/2706652}, Volume = {43}, Year = {1989}}   this is a stripped version of my document:  \documentclass[11pt, oneside]{article}  \usepackage{lipsum} \usepackage[margin=1in, left=1.5in, includefoot]{geometry}   \usepackage{ragged2e} % REFERENCE PREAMBLE %\usepackage{url} \usepackage{apacite} \usepackage{natbib} %\usepackage{biblatex-apa}                                                   % Bullet preamble \renewcommand{\labelitemi}{$\bullet$} \renewcommand{\labelitemii}{$\diamond$} \renewcommand{\labelitemiii}{$\circ$} % graphics preamble \usepackage{graphicx}   %Allows you to import images \usepackage{float}      %Allows for control of float positions %HEADER AND FOOTER STUFF \usepackage{fancyhdr}  \pagestyle{fancy} \usepackage{graphicx}        \usepackage{amssymb} %Zeilenabstand 1,5 wenn aktiviert  \usepackage{setspace}\makeatletter\newcommand{\MSonehalfspacing}{\setstretch{1.44}\ifcase \@ptsize \relax\setstretch {1.448}\or\setstretch {1.399}\or\setstretch {1.433}\fi}\newcommand{\MSdoublespacing}{\setstretch {1.92}\ifcase \@ptsize \relax\setstretch {1.936}\or\setstretch {1.866}\or\setstretch{1.902}\fi}\makeatother\MSonehalfspacing %Zeilenabstand Code fertig \usepackage[hidelinks]{hyperref}   %allows for clickable reference %                       BEGIN OF DOCUMENT \citeA{source} %                       REFERENCES  \renewcommand{\sectionmark}[1]{\markright{\thesection\ #1}} \fancyhf{} \rhead{\fancyplain{}{Identifying the Regime}} \lhead{\fancyplain{}{List of References}} \cfoot{\fancyplain{}{\thepage}}  \setlength\bibitemsep{1.9\itemsep} \bibliography{/User/Desktop/Thesis/references/mybib.bib}                   \bibliographystyle{apa} \addcontentsline{toc}{section {\numberline{}References}                                                       \end{document}   I would like to have the bibliography entry include a retrieved from    I tried to deactivate hyperref – as suggested in another post – but it didn't work. I also tried to activate and deactivate natbib and apacite as well.   I would really appreciate any help...


Checking for required M4 macros...   libtool.m4 not found   glib-gettext.m4 not found   intltool.m4 not found   pkg.m4 not found ***Error***: some autoconf macros required to build Package   were not found in your aclocal path, or some forbidden   macros were found.  Perhaps you need to adjust your   ACLOCAL_FLAGS?   I've noticed most variables are paths and error output above indicates that aclocal requires one as well. If that is the case : what is aclocal, how can I find it(will apt-file search work?), and what is meant by flag anyway?

I am trying to compile  but when I run ./autogen.sh the script terminates with these errors  Checking for required M4 macros...   libtool.m4 not found   glib-gettext.m4 not found   intltool.m4 not found   pkg.m4 not found   gtk-doc.m4 not found   yelp.m4 not found ***Error***: some autoconf macros required to build mate-desktop   were not found in your aclocal path, or some forbidden   macros were found.  Perhaps you need to adjust your   ACLOCAL_FLAGS?   What do I need to do to get rid of these errors? I tired installing the latest versions of inittool, glib, gtk, yelp, etc... but I still get the macros errors.


How can I proceed to find a maximal principal ideal in $\mathbb Z_{(2)}[x]$?   I know the answer in the sense that i know that $(2x+1)$ is a maximal principal ideal of that polynomial ring. But if i didn't, how could i reach that result, i.e. how could i reason to answer?

Let $R = \mathbb{Z}_{(2)}$ be the localization of $\mathbb{Z}$ at the prime ideal generated by $2$ in $\mathbb{Z}$. Then prove that the ideal generated by $(2x-1)$ is maximal in $R[x]$.


I am trying to install "ubuntu-13.04-desktop-i386.iso" on a Dell optiplex gx270.  I used "Universal-USB-Installer-1.9.3.5" to get it on an external Seagate Freeagent USB harddrive.  No problem.  I attach to Seagate to the desired computer to install Ubuntu and it boots to the USB with no problem.  The screen hangs with the Ubuntu logo for a while, then I get the error message:  (initramfs) unable to find a medium containing a live file system   Please can anyone help me with this?

Error message:  (initramfs) unable to find a live medium containing a live file system   I got this error while trying to install Ubuntu 10.10 from a bootable USB stick on to Asus X64J series laptop. After getting this error the installation fails to start.  I have used the same USB stick on some other laptops and the installation started as usual. Any help will be appreciated.


I would like to be able to upload a vector image (pdf, eps, svg, etc.) to my question, but SE does not seem to allow this. I know I can post a link to Dropbox or something like that, but it would be nice to have the image within the question.  Can this ability be added?

I am unable to upload SVG image files to Stack Overflow. So I would like to know why it is blocked while other image formats are allowed.  SVG images are useful for diagrams such as tree diagrams for algorithm discussions.


How can I prove that $\sqrt{3}+ \sqrt{5}+ \sqrt{7}$ is irrational?   I know that $\sqrt{3}, \sqrt{5}$ and $\sqrt{7}$ are all irrational and that $\sqrt{3}+\sqrt{5}$, $\sqrt{3}+\sqrt{7}$, $\sqrt{5}+\sqrt{7}$ are all irrational, too. But how can I prove that $\sqrt{3}+ \sqrt{5}+ \sqrt{7}$ is irrational?

I want to prove that for $p,q,r$ different primes, $\sqrt{p}+\sqrt{q}+\sqrt{r}$ is irrational.   Is the following proof correct?  If $\sqrt{p}+\sqrt{q}+\sqrt{r}$ is rational, then  $(\sqrt{p}+\sqrt{q}+\sqrt{r})^2$ is rational, thus $p+q+r+2\sqrt{pq}+2\sqrt{pr}+2\sqrt{qr}$ is rational, therefore $\sqrt{pq}+\sqrt{pr}+\sqrt{qr}$ is rational.  If $\sqrt{pq}+\sqrt{pr}+\sqrt{qr}$ is rational, then $(\sqrt{pq}+\sqrt{pr}+\sqrt{qr})^2$ is rational, therefore $pq+qr+pr+\sqrt{p^2qr}+\sqrt{pq^2r}+\sqrt{pqr^2}$ is rational, therefore $p\sqrt{qr}+q\sqrt{pr}+r\sqrt{pq}$ is rational.  Now suppose $p<q<r$. If $p\sqrt{qr}+q\sqrt{pr}+r\sqrt{pq}$  and $\sqrt{pq}+\sqrt{pr}+\sqrt{qr}$ are rational, then $$p\sqrt{qr}+q\sqrt{pr}+r\sqrt{pq}-p(\sqrt{pq}+\sqrt{pr}+\sqrt{qr})$$  is rational, therefore $(q-p)\sqrt{pr}+(r-p)\sqrt{pq}$ is rational.   If $(q-p)\sqrt{pr}+(r-p)\sqrt{pq}$ is rational, then $((q-p)\sqrt{pr}+(r-p)\sqrt{pq})^2$ is rational, thus $(q-p)^2pr+2(q-p)(r-p)\sqrt{p^2qr}+(r-p)^2pq$ is rational, thus $\sqrt{qr}$ is rational.  But $q,r$ are distinct primes, thus $qr$ can't be a square. Thus $\sqrt{qr}$ is irrational. Contradiction.   Also, is there an easier proof?


I can not find the corresponding unicode of this character I need it, to use in my Java application  I also searched more in some unicode tables, like following link  Also, searched in  community But no luck So, generally How I can know the corresponding unicode of required character?

I have to maintain a large number of classic ASP pages, many of which have tabular data with no sort capabilities at all. Whatever order the original developer used in the database query is what you're stuck with.  I want to to tack on some basic sorting to a bunch of these pages, and I'm doing it all client side with javascript. I already have the basic script done to sort a given table on a given column in a given direction, and it works well as long as the table is limited by certain conventions we follow here.    What I want to do for the UI is just indicate sort direction with the caret character ( ^ ) and ... what?  Is there a special character that is the direct opposite of a caret?  The letter v won't quite cut it.  Alternatively, is there another character pairing I can use?


I want to import all python modules in a directory in python, and came across this snippet:  for name in os.listdir("modules"):     if name.endswith(".py"):         module = name[:-3]   # remove extension name for convenience.         globals()[module] = __import__(os.path.join("modules", name))   program outputs:  ImportError: Import by filename is not supported.  How to I import file by filename?

How can I load a Python module given its full path? Note that the file can be anywhere in the filesystem, as it is a configuration option.


I'm using Ubuntu 16.04.  addicted@ADDICTED:~$ xrandr Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384 DVI-I-0 disconnected (normal left inverted right x axis y axis) DVI-I-1 disconnected (normal left inverted right x axis y axis) DP-0 disconnected (normal left inverted right x axis y axis) DP-1 disconnected (normal left inverted right x axis y axis) DP-2 disconnected (normal left inverted right x axis y axis) DP-3 disconnected (normal left inverted right x axis y axis) HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm    1024x768      70.07 +  60.00      1920x1080     59.93*     1680x1050     59.95    59.88      1440x900      59.89      1400x1050     59.98      1360x768      59.96    59.80      1280x1024     60.02      1280x960      60.00      1152x864      70.00    60.00      960x540       59.99      840x525       60.01    59.88      800x600       72.19    60.32    56.25      720x450       59.89      700x525       59.98      680x384       59.96    59.80      640x480       59.94      512x384       70.07    60.00      400x300       72.19      320x240       60.05   DP-4 disconnected (normal left inverted right x axis y axis) DP-5 disconnected (normal left inverted right x axis y axis)   I want to set resolution of 1920x1080 system wide irrespective of user. If I delete ~/.config/monitors.xml, my resolution changes to 1024x768 (maybe because 1024x768 is 1st entry in xrandr) If I run xrandr --output HDMI-0 --primary --mode 1920x1080 , it's set to 1920x1080. But only temporarily. The only permanent solution is using ~/.config/monitors.xml. But this also doesn't change resolution at login screen.  How to set 1920x1080 resolution system wide?  What I tried so far:   changing /etc/lightdm/lightdm.conf & adding xrandr command.so it would execute xrandr --output HDMI-0 --primary --mode 1920x1080 at lightdm service start. This doesn't work. Hard-linking ~/.config/monitor.xml to `/var/lib/lightdm/.config/monitor.xml. Linking failed because of an invalid cross device link. Adding modeset to /etc/X11/xorg.conf which leads to issues. This failed failed with "Input device not supported", I then had to boot into recovery mode & resetting that xorg.conf.

I spent some time getting my settings correct for multiple monitors, and that is working fine when I am logged in, but is not right at the login screen or for other users.  How do I set the display settings globally for all users and the login screen?


We can regard $\Pi_{1}(X,x_{0})$ as the set of basepoint-preserving homotopy classes of maps $(S^{1},s_{0})\rightarrow(X,x_{0})$ . Let $[S^{1},X]$ be the set of homotopy classes of maps $S^{1}\rightarrow X$ , with no conditions on basepoints. Thus there is a natural map $\Phi:\Pi_{1}(X,x_{0})\rightarrow [S^{1},X]$ obtained by ignoring basepoints. Show that $\Phi$ is onto if $X$ is path-connected, and that  $\Phi([f])=  \Phi([g])$  iff $[f]$ and $[g]$  are conjugate in $\Pi_{1}(X,x_{0})$ . Hence $\Phi$  induces a one to  one correspondence between $ [S^{1},X]$ and the set of conjugacy classes in $\Pi_{1}(X)$ when $X$ is path-connected.  this is  problem 6 from hatcher page 38. for showing that it is onto,my Idea was to take $f$ in $[S^{1},X]$,and consider a point say $x\in f(S^{1})$,because of $X$ is path connected we can have a path from $x$ to $x_{0}$ call it $\alpha$,I know that it is not exact but I feel $f(S^{1})\cup \alpha$ is the element in $\Pi_{1}(X,x_{0})$ which we need.  for second part I have no Idea.  1.please help me to make them complete and exact.  2.I don't underestand this part well,when it say :"We can regard $\Pi_{1}(X,x_{0})$ as the set of basepoint-preserving homotopy classes of maps $(S^{1},s_{0})\rightarrow(X,x_{0})$" . please give me good imagination about it.  3.can you guide to how I must have a good vision to solve algebraic topology problems?I know by practicing it will be achieved but sometimes I feel that there is something that is more like a gap in my mind.  I will be very thankful for your consideration.

I am trying to do this question taken from Hatchers algebraic topology and I am struggling to understand the notation and the concepts.  As far as I know $\pi_1(X,x_0)$ is the set of end point preserving homotopy classes of loops in X based at $x_0$ and a loop is just a path    $f:I \rightarrow X$ with $f(0)=f(1)$. The question says we can regard $\pi_1(X, x_0)$ as the set of basepoint preserving homotopy classes of maps $(S^1, s_0) \rightarrow (X, x_0)$.   This confuses me, does it mean the set of basepoint preserving homotopy class on maps $g:S^1 \rightarrow X$ which map loops in $S^1$ based at $s_0$ to loops in X based at $x_0$?  Then how can $\pi_1(X,x_0)$ be regarded as this set?  If someone could explain this it would be really useful