able strategy if not the best since no strategy can exceed 1/2. On the other hand, if the probability decays to 0, it raises a new question to understand why that's the case, if all strategies decay to a victory probability of 0 as the number of doors increase, or if there exists a strategy that is within some bound \Delta < \frac{1}{2} of \frac{1}{2}.
We can start asking these questions if we have an expression for the probability of victory. Let's consider n = 2k doors, where k represents the number of tries, and n = 100 in the original problem. We have characterized the victory cases as those in which the permutation of doors can be represented as cycles of at most k. To calculate the probability, we can use the cycle index of the symmetric group S_n as
Z(S_n) = \sum_{j_1+2 j_2 + 3 j_3 + \cdots + n j_n = n} \frac{1}{\prod_{i=1}^n i^{j_i} j_i!} \prod_{i=1}^n a_i^{j_i},
where a_i denotes cycles of length i.
It turns out the cycle index of the symmetric group can be expressed as the recurrence
Let's define F_n(a_1, \ldots, a_n) = Z(S_n) to highlight the dependence on the cycles. Thus, we can rewrite the above equation as
F_n(a_1, \ldots, a_n) = \frac{1}{n} \sum_{l=1}^n a_l F_{n-l}(a_1, \ldots, a_{n-l}).
Let's define the cumulative distribution function (CDF) F_{n}^{(i)} as F_n(a_1, \ldots, a_n) evaluated at a_l = 1, l \leq i and a_l = 0, l > i. In words, F_{n}^{(i)} is the probability that all cycles are of length i or less.
Thus, if we can find an expression for F_{n}^{(k)}, we can evaluate it at F_{100}^{(50)} to get our result. The results are contained in Propositions 1 and 2 below, where Proposition 2 is reminiscent of our folk theorem, which yields a probability of 0.306, which is slightly less than 1/3. Furthermore, Corollary 1.1 indicates that we decrease monotonically to this probability, so regardless of the number of doors, this strategy is within 0.2 of \frac{1}{2}, the upper bound on how well one could possibly do.
Proposition 1. F_{2k}^{(k)} = F_{n}^{(k)} = 1 - \sum_{m=k+1}^n \frac{1}{m}.
Proof: The first equality is by definition, so we simply need to show the second equality. For i \leq j, we can evaluate the probabilities as
F_{2j}^{(i)} = \frac{1}{2j} \sum_{l=1}^i F_{2j-l}^{(i)}
F_{2j}^{(2j-i)} = \frac{1}{2j} \sum_{l=1}^i F_{2j-l}^{(2j-i)} +\frac{1}{2j}\sum_{m=i+1}^{2j-i} F_{2j-m}^{(2j-m)} = \frac{2j-2i}{2j}+ \frac{1}{2j} \sum_{l=1}^i F_{2j-l}^{(2j-i)}
F_{2j+1}^{(i)} = \frac{1}{2j+1} \sum_{l=1}^i F_{2j+1-l}^{(i)}
F_{2j+1}^{(2j+1-i)} = \frac{1}{2j+1} \sum_{l=1}^i F_{2j+1-l}^{(2j+1-i)} + \frac{1}{2j+1} \sum_{l=i+1}^{2j+1-i} F_{2j+1-l}^{(2j+1-l)} = \frac{2j+1-2i}{2j+1} + \frac{1}{2j+1} \sum_{l=1}^i F_{2j+1-l}^{(2j+1-i)}.
Note that if i \leq j, then i - 1 \leq j, so we can apply the same result to get that
F_{2j}^{(2j+1-i)} = \frac{2j-2(i-1)}{2j}+ \frac{1}{2j} \sum_{l=1}^{i-1} F_{2j-l}^{(2j+1-i)}
and substituting this into our expression for F_{2j+1}^{(2j+1-i)} yields
F_{2j+1}^{(2j+1-i)} = \frac{2j}{2j+1} (F_{2j}^{(2j+1-i)} - \frac{2j-2(i-1)}{2j}) = F_{2j}^{(2j+1-i)} - \frac{1}{2j+1}.
Likewise, one can similarly derive
F_{2j}^{(2j+1-i)} = F_{2j-1}^{(2j+1-i)} - \frac{1}{2j}.
Starting with the base case that F_{2k}^{(k)} = F_{n}^{(k)} = F_{n-1}^{(k)} - \frac{1}{n} and the above inductive steps, one can conclude that
F_{n}^{(k)} = F_{k}^{(k)} - \sum_{m=k+1}^{2k} \frac{1}{m}.
However, F_{k}^{(k)} = 1, so we have our result.
Corollary 1.1. F_{n+2}^{(k+1)} = F_{n}^{(k)} - \frac{1}{(n+2)(n+1)}.
Proposition 2. \lim_{k \rightarrow \infty} F_{2k}^{(k)} = 1 - \ln 2 \approx 0.306
Proof: From Proposition 1, we can write
F_{2k}^{(k)} = 1 - \sum_{m=k+1}^{2k} \frac{1}{m}. Note that we can rewrite the summation
\sum_{m=k+1}^{2k} \frac{1}{m} = \sum_{i=1}^{k} \frac{1}{k+i} = \sum_{i=1}^{k} \frac{1}{1+i/k} \frac{1}{k}.
The key is to observe that this is simply a Riemann sum approximating the integral
\int_{0}^1 \frac{1}{1+x} dx = \ln 2,
which converges as we let k \rightarrow \infty.
Posted in Probability, Puzzle | 8 Comments
Ages of Three Daughters
My uncle's in town and just reminded me of a puzzle that he'd asked me over ten years ago. A census worker goes to a house and the person who answers the door tells the census worker that she has three daughters.
"I need to know their ages," replies the census worker.
"Well, the product of their ages is my age: 36."
"That's not enough information."
"Well, the sum of their ages is the same as the number as the house on the right."
The census worker checks the house next door and responds, "That's still not enough information."
"My eldest daughter is asleep upstairs."
The census worker thanks the homeowner and leaves. How old are the three daughters?
I love this puzzle because on the face of it, it would appear that there isn't enough information to figure out the puzzle. If you want to figure out the puzzle yourself, do not read beyond this point.
The first thing we learn about the ages of the daughters is that the product of the ages is 36.
Let's consider all such possibilities (let's assume the puzzle maker only allows for integer ages):
As the census worker notes, there are still too many to disambiguate the ages.
The next clue is that the sum of the ages is the same as the number of the house next door. We don't know the sum, but the census worker does, and we also know that the house number is insufficient to disambiguate the ages. Let's look at the sums of the factorizations above:
1+1+36 = 38
1+2+18 = 21
1+3+12 = 16
1+6+6 =


text:
Visiting Applications and Rules for Visiting a Georgia Inmate
Without knowing what to expect, many people are often too intimidated or discouraged to pursue visiting their friend or loved one. Many people shy away from visiting their inmate simply because the process can be overwhelming. Let us help you get through the process. The most common problem when it comes to visiting an inmate, is people don't know where to start. That is why we have assembled answers to the most frequently asked questions and created this general guide to visiting an inmate in Georgia. Here is what you need to know:
- During the initial classification and diagnostic procedure, inmates will not be allowed to have visitors. This process is usually completed fairly quickly, but at times can take over 60 days. If it the diagnostic process goes over 60 days the inmate will be allowed to complete a visitors list of immediate family members.
- Immediate family members are defined as parents, children, spouse, brothers or sisters, grandparents, and grandchildren.
- The offender must contact their counselor and complete a visitation list form. In order to complete this form, the inmate will need to know the full name, address, and date of birth of the visitor.
- If you are not an immediate family member as defined above the inmate will need to complete a significant relationship visitor application form (a sample of the form is found here).
- A visitors list can only be established when the inmate first arrives at their permanent facility. After this, inmates can only update their visiting list in May and November.
- If you are traveling from out of state, or only one time you may qualify as a "special visit". Special visits must be submitted at least 48 hours in advance and require the Warden/Superintendent's approval. People who often qualify for a special visit are members of the military who are visiting while on personal leave, clergy, family members with disabilities that require a third party to drive them to visitation, and anyone traveling a long distance out-of-state. Special visits can have no more than two visitors during the visit.
- Regular visitation occurs on Saturdays, Sundays and Holidays.
- The duration of the visit will depend on how crowded the facility is, and other factors that may arise.
- Anyone 16 years or older must provide a valid state or government issued photo ID.
- Generally, no items other than your ID, a single car key, and a maximum of $20 in coins can come with you into the facility. All other items, cell phones, radios, cameras etc. are not allowed to come with you.
- If you are traveling with a small child/baby you may be allowed to bring other items such as a single clear plastic baby bottle, diaper, and sealed formula. You will need to contact the individual institution for more specific information.
- Minors or anyone under the age of 16 must bring a birth certificate with them to visitation, and be accompanied by a parent or guardian who is also on the visiting list for the inmate.
- All visitors will be searched and must pass through a metal detector. Your car may also be searched once it is on the property of the institution.
When visiting an inmate in Georgia, some additional information you may want to know is:
- You should arrive at the facility at least 30 minutes prior to the visitation period to ensure you have enough time to park and go through visitor registration and processing procedures.
- Non-contact visitation is conducted behind a window, or partition that keeps you physically separate from the inmate.
- Contact visits allow a brief hug and a kiss at the beginning and end of each visit.
- Tobacco-related products are not allowed in visitation, all facilities are smoke-free.
- If you leave the visiting room you may not be allowed to reenter, so use the bathroom in the lobby before entering into visitation.
Dress Code/Contact Rules for Visitors of Georgia Inmates
It is important to know there is a dress code and contact rules that must be followed when you are visiting an inmate in Georgia. The code is strictly enforced by the staff, so be sure you read over and follow all of the following:
- All visitors must wear shoes at all times (excludes babies).
- Men who are visiting must wear a shirt and full-length pants.
- Women may wear full-length pants, dress or skirt, but it must not be more than two inches above the knee.
- All men and women who are visiting must wear underwear, including bras, and panties.
- Some visitors have reported that certain facilities require a collared shirt to be worn by visitors.
- No one over 12 years old may wear shorts.
- No clothing may be sheer or see-through or made of net or mesh webbing.
- Tube tops, tank tops, halter tops, spandex, leggings, any dresses or tops with thin straps that expose the shoulders, chest/cleavage, back, or midriff is also prohibited.
- Clothing that contains offensive language or images may not be worn.
- Uniforms, such as military fatigues, nurse, doctor, or any clothing that resembles what the inmates are wearing is not allowed.

source: openbmb/Ultra-FineWeb


text:
What is Persistence?
Persistence is just taking today's weather and forecasting that tomorrow's weather will be exactly the same. This is considered an unskilled forecast because it doesn't take any special training to make. You can forecast the weather yourself this way! Just take today's high temperature, low temperature, and precipitation and say that tomorrow, and the next day, and the next, will be exactly the same.
If you see that the Persistence forecast has a higher accuracy percentage than the skilled forecasts, then you will know that they are not doing their job! The Persistence forecast should always be less accurate than the weather professionals.

source: HuggingFaceFW/fineweb-edu


text:
|Los Gatos Tomato Products is committed to the quality of our environment as well as our paste. This commitment begins and ends in the field. We are constantly looking to add to our practices that conserve water and energy, improve air quality, and reduce our impact on the environment. Here are just a few examples of our practices:|
- We minimize waste by using tomato skins and seeds as cattle feed. All remaining tomato waste material is used as topical soil amendment.
- Operational since 2009, our solar power generation plant supplies 25% of our in-season electrical energy needs and produces energy year-round.
- All boiler burners have been upgraded to reduce emissions by almost 80%.
- Our factory is located in the middle of our productive land, where the tomatoes are grown within a very short distance to the facility, improving freshness and reducing the use of diesel fuel for transportation.
- Our growers use drip irrigation on 95% of our tomato acres to minimize the use of water and fertilizer and ensure the plants receive these inputs where they can use them in the most effective and timely manner.
- With the drip lines buried in the soil, we minimize the amount of tillage which improves the soil structure, preserves the moisture and organic matter in the soil, reduces carbon emissions and saves diesel fuel.
- We transplant +99% of the tomato crop, which reduces the amount of irrigation and herbicides required to produce the crop.
- Our growers are among the most productive in the world, thereby maximizing the effectiveness of all inputs, such as water, nitrogen fertilizer, pesticides, and diesel.


text:
Concrete brick machine is a low noise, dust free and non-percussive drilling method used to make smooth holes. Concrete Brick Machine techniques are required when you need a precise circular penetration.
Using concrete brick machine techniques you can make holes of any size and depth. This can be used for construction installation applications, water system applications, earthwork quality inspection applications, electrical system applications, gas supply system applications, heating system applications, railway installation application, bridge installation application, plumbing application, telecommunication line installation application, concrete sample analysis, anchoring bolts, and mining application.
Rotary and Wireline are the main types of concrete brick machine techniques. Rotary drilling method utilized for borehole drilling and coring in rocks. Wireline is one type used for mineral exploration and it aims at not making a hole but to retrieve a core sample.
The different methods of concrete brick machine are Electric, Hydraulic and Pneumatic available for wet or dry drilling applications. The Electric method is used to drill perfect holes in tile, natural stones like granite, and gravestones, concrete, countertops, plumbing and other masonry applications.
The brick machine method uses a brick machine bit fixed to the end of drill rod in the drilling machine or equipment. The diamond bit is rotated gently and at the same time it is lubricated with water to prevent overheating. With the drilling which uses diamond core drill bits, the primary importance is given in providing enough water lubrication on the cutting edge of the diamond bit. Reduced drill speeds, low drill pressure and copious use of water lubrication increase the durability of the drill bit.
This is categorized based on the different lubrication techniques used. The various methods of drilling are Hose or Water Drip, Clay Dam, Pan Drilling and Spray Bottle concrete brick machine. Hose or Water Drip method: This method of drilling uses a small hose to run water into the bore hole and onto the hole surface.
Clay Dam concrete brick machine method: This method involves building a dam around the drill hole with the help of modeling clay. This method allows water to flow into the diamond bit and provides good interior lubrication. Pan Drilling diamond drilling method: This method involves using pan or plastic tub filled with water such that it covers the surface of the material being drilled. Spray Bottle diamond drilling method: This method of diamond drilling method involves constantly spraying water into the bore hole using a spray bottle.
In all the above methods, it is very important to use the pumping technique in order to allow lubrication to reach the tip of the concrete brick machine bit. A periodic pumping action is essential to extensively improve the lubrication at the drill tip. The pumping technique ensures that water reaches the drill tip area and completely lubricates the drill tip.
Ningbo Yinzhou Nuoya Cement Block Machine Factory, a professional manufacturer and exporter of all kinds of Single and Multi Spring brick machine,concrete brick machine,block machine,We are a member of Building Block Association with excellent and advanced technology.


How Member Discovery Works
Pivotal GemFire provides various options for member discovery within a distributed system and between clients and servers.
Peer Member Discovery
Peer member discovery is what defines a distributed system. All applications and cache servers that use the same settings for peer discovery are members of the same distributed system. Each system member has a unique identity and knows the identities of the other members. A member can belong to only one distributed system at a time. Once they have found each other, members communicate directly, independent of the discovery mechanism. In peer discovery, GemFire uses a membership coordinator to manage member joins and departures.
Members discover each other using one or more locators. A locator provides both discovery and load balancing services. Peer locators manage a dynamic list of distributed system members. New members connect to one of the locators to retrieve the member list, which it uses to join the system.
Note: Multiple locators ensure the most stable start up and availability for your distributed system.
Standalone Member
The standalone member has no peers, does no peer discovery, and so does not use locators. It creates a distributed system connection only to access the GemFire caching features. Running standalone has a faster startup and is appropriate for any member that is isolated from other applications. The primary use case is for client applications. Standalone members can be accessed and monitored if you enable the member to become a JMX Manager.
Client Discovery of Servers
Locators provide clients with dynamic server discovery and server load balancing. Clients are configured with locator information for the server system, and turn to the locators for directions to the servers to use. The servers can come and go and their capacity to service new client connections can vary. The locators continuously monitor server availability and server load information, providing clients with connection information for the server with the least load at any time.
Note: For performance and cache coherency, clients must run as standalone members or in different distributed systems than their servers.
You do not need to run any special processes to use locators for server discovery. The locators that provide peer discovery in the server system also provide server discovery for clients to the server system. This is the standard configuration.
Multi-site Discovery
In a multi-site (WAN) configuration, a GemFire cluster uses locators to discover remote GemFire clusters as well as to discover local GemFire members. Each locator in a WAN configuration uniquely identifies the local cluster to which it belongs, and it can also identify locators in remote GemFire clusters to which it will connect for WAN distribution.
When a locator starts up, it contacts each remote locator to exchange information about the available locators and gateway receiver configurations in the remote cluster. In addition to sharing information about its own cluster, a locator shares information that it has obtained from all other connected clusters. Each time a new locator starts up or an existing locator shuts down, the changed information is broadcast to other connected GemFire clusters across the WAN.
See Discovery for Multi-Site Systems for more information.


Browse Publications Technical Papers 2019-01-2254
Measurements and modeling of ozone enhanced compression ignition in a rapid compression machine and optically-accessible engine 2019-01-2254
For the present study, an ultraviolet light absorption diagnostic was used to measure O3 concentration during the compression stroke of a rapid compression machine and an optically-accessible research engine. Charge oxygen concentration, initial temperature, and equivalence ratio were varied; neat iso-octane was used for fueled experiments. Measurements were compared to single-zone chemical kinetic simulation results. Rapid thermally induced O3 decomposition was observed near top dead center. Ozone decomposition advanced when the charge temperature was increased, oxygen concentration was reduced, or fuel was added. While the model well-captures the experimental trends, for unfueled conditions the temporal prediction of O3 decomposition is generally too far retarded.
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Take the 2-minute tour ×
If $X$ is a scheme, the Hilbert scheme of points $X^{[n]}$ parameterizes zero dimensional subschemes of $X$ of degree $n$.
Why do we care about it?
Of course, there are lots of "in subject" reasons, which I summarize by saying that $X^{[n]}$ is maybe the simplest modern moduli space, and as such is an extremely fertile testing ground for ideas in moduli theory. But it is not clear that this would be very convincing to someone who was not already interested in $X^{[n]}$.
The question I am really asking is:
Why would someone who does not study moduli care about $X^{[n]}$?
The main reason I ask is for the sake of having some relevant motivation sections in talks. But an answer to the following version of the question would be extremely valuable as well:
What can someone who knows a lot something* about $X^{[n]}$ contribute to other areas of algebraic geometry, or mathematics more generally, or even other subjects?
*reworded in light of the answer of Nakajima
share|improve this question
11 Answers 11
up vote 29 down vote accepted
What can someone who knows a lot about $X^{[n]}$ contribute to other areas of algebraic geometry, or mathematics more generally, or even other subjects?
I know a little about $X^{[n]}$. And I have no contribution to mathematics nor other areas of algebraic geometry. But I find study of Hilbert schemes is very interesting. Isn't it enough to motivate to study Hilbert schemes?
share|improve this answer
If I am asked this question by a politician, I will answer differently. – Hiraku Nakajima Sep 29 '10 at 12:43
-1 mark for excessive modesty – Richard Thomas Oct 20 '10 at 13:38
One of the reasons is the following. If $X$ is a smooth curve the symmetric product $X^{(n)}$ is smooth. If $X$ is a smooth surface, $X^{(n)}$ is singular, but it is a theorem of Fogarty that $X^{[n]}$ is smooth. So it is a (rather natural) resolution of singularities of $X^{(n)}$.
If moreover $X$ is a symplectic surface (i.e. either a $K3$ or an abelian surface), $X^{[n]}$ has a symplectic form. As Beauville showed, in the $K3$ case it is even an irreducible symplectic variety; in the abelian case a certain subvariety $K_{n-1}(X) \subset X^{[n]}$ is irreducible symplectic.
There are really few known examples of irreducible symplectic varieties in higher dimension: up to deformation, I have listed them all, except for two sporadic examples constructed by O'Grady! This shows that the Hilbert schemes $X^{[n]}$ are indeed very relevant to people who study holomorphic symplectic geometry.
share|improve this answer
Andrea- I assume you mean irreducible projective symplectic varieties? There are loads of quasi-projective ones that don't fit in your class. – Ben Webster Sep 29 '10 at 3:03
_USER_: thank you for pointing out; of course I am talking about complete examples. – Andrea Ferretti Sep 30 '10 at 19:40
Mark Haiman used Hilbert schemes of surfacesto prove the Macdonald positivity conjecture about Macdonald polynomials: see Hilbert schemes, polygraphs, and the Macdonald positivity conjecture
share|improve this answer
The connection between the geometry of the Hilbert scheme of points on $\mathbb{C}^d$ and the combinatorics of $d$-dimensional partitions (piles of $d$-dimensional boxes in the corner of an $d$-dimensional room) may resonate with some audiences. In dimension 3 especially, geometric knowledge has led to beautiful combinatorial results about 3 dimensional box counting (I have in mind Young arXiv:0802.3948 and Okounkov-Reshetikhin-Vafa hep-th/_PHONE_).
The connection that Allen mentions with quivers is nice, and to counter to his dimension 2 bias, I think the quiver story is arguably even better in dimension 3. The Hilbert scheme of points on $\mathbb{C}^3$ (or $\mathbb{C}^3/G$) is given by representations of a quiver with super-potential. Unlike the surface case, the relations on the quiver are given by the critical locus of a single function --- a phenomenon special to dimension 3.
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I believe everyone so far has said "Hilbert schemes of points on surfaces" are worth studying. Personally, I take this as a sign that Hilbert schemes of points (on general $X$) are not that interesting, and that it's merely a historical accident that these glittering jewels were first found within the many tons of worthless Hilbert scheme ore.
In particular, note that the Hilbert scheme of $n$ points in the plane (or on other $\widetilde{{\mathbb C}^2/\Gamma}$, for $\Gamma \leq SU(2)$) can be alternately seen as a Grojnowski-Nakajima quiver variety, and these are smooth holomorphic symplectic manifolds in general.
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Have you heard of any type of process that gives you the Hilbert scheme of points if you input a surface but gives you something better behaved than the Hilbert scheme of points if you plug in something higher-dimensional? – Peter Samuelson Sep 29 '10 at 5:07
Hilbert schemes of points in the plane come up in representation theory. More specifically in the representation theory of rational Cherednik algebras.
Rational Cherednik algebras, and more generally symplectic reflection algebras have a close connection with symplectic resolutions, algebraic combinatorics, integrable systems and more and are thus very interesting.
See for example: This paper
and This paper
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Slogan: the Hilbert scheme of $n$ points on the minimal resolution of an ADE singularity (associated to a finite subgroup $G \subseteq SL_2(\mathbb{C})$) is to the symplectic reflection algebra of type $G^n \rtimes S_n$ as the flag variety $G/B$ is to the universal enveloping algebra of $\mathrm{Lie}(G)$. So far this is not completely understood. – Sheikraisinrollbank Sep 28 '10 at 9:43
er... typo. Of course I meant, cotangent bundle to $G/B$. – Sheikraisinrollbank Sep 29 '10 at 13:42
One can use Hilbert schemes of points on a surface $S$ to detect sigularities of embedded curves $C \subset S$. For instance let $\xi \in S^{[3]}$ be a "fat point", i.e. a subscheme of $S$ isomorphic to $Spec(\mathbb{C}[x,y]/(x^2,xy,y^2))$, then $C$ contains $\xi$ if and only if $C$ has a singularity at $supp(\xi)=\{ p \}$.
In a recent preprint Thomas, Kool and Shende (_URL_ use this method to proof Goettsche's conjecture about counting singular members of linear systems on surfaces. The basic idea is to write the counting problem as an intersection product of class on $S \times S^{[n]}$ and use results of Ellingsrud-Goettsche-Lehn (building on work of Nakajima) which describe the intersection theory on $S^{[n]}$.
REMARK: I just got aware of the fact, that V. Schende who coauthored the above paper is actually asking the question. So he probably knows about this application.
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+1 for the remark :-) – Kevin H. Lin Oct 19 '10 at 6:47
Someone answered, when asked by braids and braid groups were important, answered that they are important because they are histories of permutations and permutations are important (or something along that line; I'd love a precise quotation!)
The Hilbert scheme is, in a way, the collection of all possible states in those histories (and all the possible ways you can mess up when permuting points...)
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I would really love any more precise information about these ideas... – Vivek Shende Sep 27 '10 at 17:48
See the work of Nakajima and Grojnowski, where for a fixed algebraic surface $X,$ the points of the Hilbert schemes $X^{[n]}$ for all $n$ are interpreted as instantons on $X.$ – Victor Protsak Sep 28 '10 at 3:28
As a student I once asked John Mather for advice about dealing with spaces of ordered $n


text:
Central Research Institute for Dryland Agriculture (CRIDA)
The Central Research Institute for Dryland Agriculture (CRIDA) carries out problem-oriented, multi-disciplinary research on India's natural resources, with a focus on conservation and efficient, sustainable exploitation.
CRIDA's contributions include strategies for agricultural drought management in dry-land areas, and the development of soil and rainwater management technologies, integrated watershed management technologies, integrated nutrient management strategies, and low-cost labour and energy-saving implements.
The organisation also functions as a training and consultancy centre on a wide variety of issues such as watershed development projects, dry-land agriculture and horticulture, soil and water conservation works, and agroforestry. Additionally, it offers research and contract services including the provision of soil and water samples, and resource maps.
The mission of CRIDA is to meet the national expectation during 21st Century, CRIDA is rededicating itself for :
-Conservation, efficient utilization, and enhancement of the quality of natural resources to achieve sustainability,
-Reducing risks associated with uncertain rainfall,
-Increasing productivity for food and nutrition security,
-Diversifying land use for additional employment opportunities, and
-Assured socio-economic growth of the farmers in drylands.


A SCience Odyssey Radio Transmission
How is a Radio Wave Emitted?
Diagram of atoms within a wire showing movement of electrons between atoms
OK. So we have a signal that is sent to a radiosmitter's antenna. How does that signal get from the antenna to the air?
Let's first take a look at the signal. The signal is an electic current, and every electric current is actually electrons moving in a wire.
Wire is made of metal, usually copper. All of the atoms that make up the wire have something in common -- each has one or two electrons in its outer-most shell.
These electrons do not have a strong bond with the rest of the atom. In fact, it takes just a slight amount of energy to push the electron away from its atom.
But if you have enough energy, the outer electrons from all of the atoms will move at once. They will each travel from one atom to the next atom, and so on.
WGBH | PBS Online | Search | Feedback | Shop
© 1998 WGBH


Supporting Volunteers - British Gymnastics
Supporting Volunteers
Recruiting new volunteers
When individuals are asked why they don't volunteer, the most common answer given is "because no one asked". You will often find that there are people within your club and community with the time and energy needed to support your club or event. It's just how you go about finding them. A good place to start is with parents of your gymnasts and previous club members. Why not design a leaflet or poster to display on your noticeboard, letting people know you are looking for volunteers. Be specific, detailing the role(s) you would like the volunteer to fill, how much time it is likely to take and what skills and attributes would be useful for the role. Individuals are much more likely to put themselves forward if they understand the level of commitment you are asking them to take on. Consider what your club does in terms of an induction process for volunteers.
Retaining volunteers
Once you've spent time, money and effort recruiting volunteers, it is important you do what you can to keep your volunteer involved: this will help with continuity at your club. Develop ways to maintain/improve the relationship between your volunteer and the club, for example by offering training for your volunteers.
Ensure that your volunteers feel valued, regardless or their role in club. It is important they know they contribute to the running of the club. This will help them to remain motivated and continue contributing because they can see the impact they are having.
Recognising volunteers
Recognition of time and effort is important to ensure volunteers feel appreciated. Learn what motivates each volunteer, and make your recognition appropriate to what they think is important. There are many ways you can recognise your volunteers, for example;
 - Thank your volunteer at the end of the session or send a Thank You letter after an event
 - Announce your volunteers at events and thank them for their hard work and commitment in front of the audience.
 - Organising a volunteer social evening
 - Nominate your volunteers for awards such as the British Gymnastics Volunteer of the Year Award, regional volunteers awards, or local sports awards operated by local councils. Even if your volunteer doesn't win, they will appreciate you recognising them by being nominated.
 - Write about your volunteers and put an article on your club noticeboard, in your club newsletter or send the it to your local newspaper.
 - Provide your volunteers with T-shirts. It will make them feel part of the team.


text:
of authors have attempted to empirically measure the impacts of immigration on labour market outcomes within the UK at a national level. However, my study aims to use regional level data from England across the period 2005 to 2012 to analyse the impacts of immigration on unemployment and wages. My results show that immigration has no significant effects on either unemployment or wages at a regional level.
- 'The Impacts of Digital Currency on China's Monetary System' by Qianru Xiang
The Impacts of Digital Currency on China's Monetary System by Qianru Xiang
This dissertation contributes to the evaluation of how digital currency would affect the monetary system by studying the influence on money demand and supply, as well as the velocity of money. After exploring the characteristics of digital currency and comparing functions with fiat currency, this dissertation establishes an econometric model to explore further the relationship between digital currency, money supply and the velocity of money in the China monetary system. In order to quantify the effects of digital currency on the changing amount of fiat currency, by analysing cash ratio, electronic currency level, financial electronic level and interest rate, this research suggests that the extension of digital currency could bring variation to the velocity of money in both the long and short term. Although the initial stage of digital currency limits the results analysis, by discussing the impacts of digital currency on the central bank of China, this dissertation concludes with China's monetary policy recommendations.


text:
Wondering about the number of letters in Belarusian and Bengali alphabets? When you compare Belarusian vs Bengali alphabets you will understand the number of alphabets in both the languages. Because lesser the number of alphabets, faster the language to learn, find all the Easiest Languages to Learn. Belarusian and Bengali Alphabets are collection of symbols or letters used for writing. Belarusian alphabets contain 48 letters and Bengali Alphabets contain 51 letters. The writing direction of Belarusian is Not Available whereas the writing direction of Bengali is Left-To-Right, Horizontal. Belarusian and Bengali Alphabets are the basics of Belarusian and Bengali languages. Check the detailed comparison of Belarusian and Bengali.
Compare Belarusian and Bengali alphabets and find out scripts used by Belarusian and Bengali language. Belarusian and Bengali scripts are the methodology and rules for writing. Scripts used by Belarusian and Bengali languages are Cyrillic and Bengali, Brahmic family and derivatives respectively. After learning alphabets in Belarusian and Bengali you can also learn useful Belarusian greetings vs Bengali greetings.
If you are comparing Belarusian and Bengali alphabets then you need to find out Belarusian vowels vs Bengali vowels too. The number of vowels and consonants in Belarusian are 6 and 39 and number of vowels and consonants in Bengali are 11 and 40. Language codes are unique and are two or three letter codes assigned to each language. Check out all the language codes of Belarusian and Bengali language codes.
Is Belarusian harder than Bengali? No language is hard or easy to learn as it depends on individual interest and efforts for learning that language. When you decide to learn any language, you need to find out time required to learn that language and levels in that language. As mentioned above, while comparing Belarusian and Bengali Alphabets the number of alphabets in any language decides hardness in learning that language.
It's important to know Belarusian and Bengali alphabets because for learning these languages, alphabets are the starting point. There are no levels in Belarusian language. And time taken to learn Belarusian language is Not Available. While the levels in Bengali language are 2. And time taken to learn Bengali language is 44 weeks.
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text:
Celebrate Black History Month: African-American Monuments in New York City's Parks
Thursday, February 14, 2013
9:00 a.m.–5:00 p.m.
This event repeats between and.
Please note: This event has already taken place. Please use the Search options on the right to find upcoming events.
The monuments in our parks honor the heights of human achievement and the depths of human sacrifice. They are intended in permanent form to commemorate persons, events and values of lasting consequence to the evolution of our city, nation and the world, and to our advancement as a people.
In honor of Black History Month, this exhibition examines those monuments in the Parks collection that honor key African-American figures in the arts, sport, the military, science, and the abolition movement and who are preserved in our collective memory. Also remembered are the many thousands of anonymous people who, until emancipation, did not have the rights of citizenship and were enslaved.


Take the 2-minute tour ×
Next semester I will be starting Calculus 2, and I opened my textbook to get a hint of the course material, and on one of the pages I saw a function being integrated twice. I've been racking my brains trying to figure out the meaning of the second integral of a function but have been unsuccessful - I really don't want to wait two months to find out, either.
The meaning of the first integral is the area bounded between the function and the x-axis; what is the meaning of the second integral?
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4 Answers 4
up vote 2 down vote accepted
If $a(t)$ is the acceleration at time $t$, then the first integral gives the velocity $v(t)$, and the second integral gives the displacement $s(t)$. That is the most important application, perhaps the only application, of integrating twice that you will meet this coming term.
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And it doesn't need to stop at 2: higher derivatives of acceleration, used in mechatronics, include: jerk, snap, crackle, pop. – alancalvitti Jan 28 '13 at 20:45
Andre is correct for the physics interpretation. Mathematically, one can describe a double integral as the volume under a surface within a particular region in the plane. For instance, $$\int_{-1}^1\int_{-1}^1{x^2+y^2}dydx$$ would represent the area under the paraboloid $z=x^2+y^2$ in the square whose vertices are at (-1,-1),(-1,1),(1,1),(1,-1)
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As one of the comments mentioned, you can have many.
From physics, they have defined:
$\bullet$ $r(t)$ - position
$\bullet$ $v(t)$ - velocity (1st derivative)
$\bullet$ $a(t)$ - acceleration (2nd derivative)
$\bullet$ $w(t)$ - jerk (3rd derivative)
$\bullet$ $s(t)$ - snap (4th derivative)
$\bullet$ $c(t)$ - crackle (5th derivative)
$\bullet$ $p(t)$ - pop (6th derivative)
You can integrate from the 6th derivative all the way back up to position.
Here is a paper on the matter.
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_USER_: Those are actually correct, and they are funny. I saw a t-shirt (we are math geeks) that says don't be a $\Large \frac{d^3y}{dx^3}$. Of course, see list for what it means! :-) – Amzoti May 5 '13 at 2:08
Really? I knew about "jerk", but not about "Kellog's" *snap, crackle, pop! – amWhy May 5 '13 at 2:09
_USER_: Yes, actually true. My guess, someone said it as a joke, but the reality, is, it is very easy to remember - so why not! :-) – Amzoti May 5 '13 at 2:11
_USER_: see referenced example paper. – Amzoti May 5 '13 at 2:13
Nice link! I learn something every day I visit math.se! – amWhy May 5 '13 at 2:15
Some Advice: Almost every calculation in higher level calculus is solved by reducing the problem to an elementary Calculus 101 calculation. This is one example.
You are probably asking about a multiple integralsuch as a volume or surface integral like the one mentioned in a previous answer.
If so, don't worry because Fubini's Theorem allows you to reduce such integrals to a a set of ordinary integrals you are already familiar with.
You never have to actually integrate over a volume or surface directly (by adding up the contributions from each volume or surface element) because you will learn how to evaluate volume and surface integrals by calculating multiple ordinary integralswhich you already know how to do.
But you will have to think carefully about the region of integration. That is new.
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Your Answer


4 Times When Laminate Flooring Is Better Than Hardwood
4 Times When Laminate Flooring Is Better Than HardwoodHardwood flooring is considered a premium flooring material. It's natural, long-lasting, durable and comes in a wide assortment of colors, wood, stains and plank widths. But hardwood flooring isn't always the best choice. If you're looking at homes to buy and eliminating the ones with laminate flooring, you could be overlooking some important considerations.
Following are four times when laminate flooring is a better option than hardwood.
1. You Live In A Very Humid Climate
Excess humidity isn't kind to hardwood floors. Wood is hygroscopic, which means it absorbs moisture from the surroundings. Too much moisture in the air can make hardwood floor planks "cup," which is when the lateral sides curl up. Wood swells when it gets wet, which can cause displacement of individual planks. Remember too, that you can live in a temperate climate, but if the house is lakeside or within 10 miles from the shoreline, that will increase the humidity levels in the home.
2. You Live In A Very Dry Climate
Hardwood floors don't respond well to dry climates, either. In times of very low humidity, wood contracts. This can lead to cracking and the development of cracks in between planks. While the gaps can be temporary, if grime gets in there, they can become permanent. Cracking is permanent and needs to be repaired and then sealed.
3. Your Family Is Hard On Floors
If you have youngsters, a big dog, or other factors, those can be hard on floors. In some cases like this, it can be damaging to hardwood floors, which are expensive to buy and maintain. Laminate flooring is much more accepting of wear and tear, and if you need to replace it, the cost isn't exorbitant.
4. You Have Special Hobbies
If you have certain activities you engage in, such as painting, fishing, wood carving or other special hobbies, you might want to reconsider the value of laminate flooring. Laminate flooring is a lot easier to clean up when it comes to paint splatters, muddy boots and wood shavings. With laminate flooring, instead of worrying about protecting your hardwood floors, you can focus on enjoying your hobby.
If your real estate agent wants you to see a house with laminate flooring, give it a chance. You might just discover that there are times when laminate flooring is better than hardwood.
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3 parameters: a function representing class constructor (or null for an empty one) an object exposing instance properties (note that EcmaScript 5 allows definition of both get and set function associated to a property) and an optional object exposing static methods.
How can we use the MultiLogger class? exactly as if it was a.NET class:
var multiLogger1 = new MyLibrary.MultiLogger(42);
// = 22; //We can't since id is read onlt...
var id =; //returns 42
multiLogger1.text = "Text to log";
var multiLogger2 = new MyLibrary.MultiLogger(43);
multiLogger2.text = "more text...";
very nice isn't it? :-)
author: Corrado Cavalli | posted @ mercoledì 21 marzo 2012 13.55 | Feedback (8)
Available memory and Background agents in Windows Phone 7
When you create a background agent for Windows Phone 7 there are a couple of important details you must be aware of:
 1. The total scheduled time for the agent to execute is 25 seconds, if you exceed it the agent will be killed by the scheduler.
 2. The max amount of memory available is 6 MB, if the agent allocates more the agent will be, again, killed.
 3. With Visual Studio debugger attached these limits are disabled.
An agent is killed silently and after two killing operations the scheduler will automatically disable it and your user probably will start wondering why your wonderful tile doesn't work as expected.
The common problem I face when dealing with agents is that 6 MB of memory are a very strict constraint especially when you realize that the agent alone consumes more than 3 MB (in real cases I got more than 5 MB allocated at startup)
So what can you do do live in a such restrict space? along with optimizations (in some cases I ended up duplicating code in order to avoid to load some dependencies) my suggestion is: never trust the debugger, with it attached the allocated memory increases so you might end up with wrong measurements.
What I normally do is to write inside application tile what is the real amount of occupied memory so that I can quickly estimate how long I can go.
Code is really straightforward:
public class ScheduledAgent : ScheduledTaskAgent
protected override void OnInvoke(ScheduledTask task)
ShellTile tile = ShellTile.ActiveTiles.FirstOrDefault();
if (tile!= null)
var current = DeviceStatus.ApplicationCurrentMemoryUsage;
ShellTileData data = new StandardTileData
Title = "Occ:" + current.ToString(CultureInfo.InvariantCulture),
And here are the differences between debug and standalone mode:
image debugger attached
Compared to overall 6MB, an important difference…
author: Corrado Cavalli | posted @ giovedì 15 marzo 2012 19.24 | Feedback (2)
Win+X is your friend in Windows 8
As advanced user I often need to reach areas like Control Panel, Event Viewer or the good old friend Command Prompt and you might imagine how happy I was to discover that using Win+X you have access to a "developer menu" in lower left corner that give you access to OS' hardcore areas Smile
You can also show the menu by pointing the mouse in lower left corner, wait for Start menu to appear then right clicking on it (but Win+X is a lot more faster…)
BTW: I took the shot using Win+PrintScreen that now automatically saves the screenshot under User's MyPicture
Technorati Tags:
author: Corrado Cavalli | posted @ martedì 6 marzo 2012 10.15 | Feedback (8)


GUELPH -- University of Guelph researchers are studying the ethics behind whether COVID-19 immunity passports would help minimize the spread of the disease in Ontario.
Andrew Bailey, the philosophy professor leading the study, said certification would help loosen COVID-19 restrictions for immunized Ontarians.
"Once people are vaccinated, they don't need that kind of protection anymore, so the restrictions should be loosened," he said.
But Bailey adds it is a massive social experiment that requires planning before being implemented.
There's also the question of if immunity passports are ethical, which Bailey believes they are.
"Just the fact that we're letting some people do things that other people can't doesn't mean it's wrong," he said. "The question is whether it is arbitrary. And this case, my take would be it is not arbitrary."
He continued: "There is a genuine ethical difference between people who are vaccinated and people who don't."
The researcher said there are some potential problems when it comes to the idea of a passport, and people looking for a return to normalcy without getting vaccinated might resort to dangerous measures.
Bailey said reducing the divide between those who are vaccine-hesitant and those who are not is one of the biggest challenges in making immunity passports realistic.
Requiring proof of immunity from certain viruses is not out of the ordinary. Elementary school students require proof of vaccination for diseases such as polio and rubella.
The Canadian Civil Liberties Association said it doesn't support any form of vaccine passport, with the choice to get a COVID-19 vaccine or not a personal one.
"Carrying papers to show that we made that decision has the potential to create a two-tier society," said Brenda McPhail with the Canadian Civil Liberties Association. "The included, those that got the vaccine, the excluded, those who don't."
The idea of vaccine passports has drawn mixed opinions among those in Waterloo Region.
"To have some sort of proof that you got a vaccine, it makes it so much easier for everybody else," said one resident.
"There are some equity issues with it, absolutely," another resident said.
According to Prime Minister Justin Trudeau, the federal government is still looking at the prospect of vaccine passports and requiring some form of proof of vaccination to travel.
Bailey said more research needs to be done to determine the efficacy of immunity passports and that for them to work, everyone needs to have equal opportunity for access to vaccines.


Drexel dragonThe Math ForumDonate to the Math Forum
Ask Dr. Math - Questions and Answers from our Archives
A 3-D Object that Fits 3 Holes
Date: 06/03/99 at 20:25:08
From: Gretchen
Subject: Geometry
Dr. Math,
I have three shapes: a triangle with the same bisector length from
each vertex, a square with the same length as the bisector of the
triangle, and a circle with a diameter the same length as a side of
the square and the length as the bisector.
I have to come up with an object that can fit in the three different
holes blocking all light and sliding all the way through without
forcing it. I have come up with the coke can squash, but it doesn't
seem to work. What I did was create a cylinder and cut the two faces
so that it lay like this:
thus creating the triangle from the front, the cone from the faces and
the square from the bottom, only the square fit only halfway through.
Is there any other way to the problem, or is my venture correct?
Thank you for your time. Hope you have as much fun with this problem
as I have.
Date: 06/04/99 at 11:49:42
From: Doctor Rick
Subject: Re: Geometry
Hi, Gretchen. This is an interesting challenge!
In your description of the problem, is it possible that you mean for
the triangle to have a height equal to its base? The way you describe
it, it would be an equilateral triangle, with height equal to
sqrt(3)/2 times the base, but in this case either the square would
have to be a rectangle or the circle would be an ellipse. They
couldn't both have the same height and width.
If I understand your description of your proposed solution correctly,
the axis of the cone is horizontal in your triangle diagram. The two
tilted sides are ellipses where the cylinder was cut off. I don't know
quite what you mean when you say "the square fit only halfway
through," but you do have a problem in this direction.
Another way to think of the problem is in terms of the shadows cast by
a light directly above, in front of, or to the side of the object. The
shadow cast by the overhead light with your object will be a rectangle
with half ellipses stuck on the sides. This is what it looks like from
the top:
 * : * * : *
 * : * * : *
 * : * : *
 * : * : *
 * : * : *
 * : * : *
 * : * : *
 * : * : *
 * : * * : *
 * : * * : *
This is obviously not a square, though its maximum width and its
height are correct so it will fit through the hole; it just won't fill
it so as to block the light.
There is a way to do it correctly. In fact, the shape I have in mind
came up recently in the answer to another question about why the
volume of a cone isn't half the base area times the height.
Stand your cylinder up vertically. It should have a height equal to
the diameter of the base circle. You will see a circle from the top
and a square from front and side. Only one view must be changed.
Draw a diameter of the top circle, front to back. Can you see what
parts have to be removed to give the correct front view without
spoiling the other views? There is more than one way to do this.
- Doctor Rick, The Math Forum
Associated Topics:
High School Geometry
High School Higher-Dimensional Geometry
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LANGUAGE TAG REGISTRATION FORM (last updated 2003-05-30) Name of requester : Mark Davis E-mail address of requester: or Tag to be registered : az-Cyrl English name of language : Azerbaijani in Cyrillic script Native name of language (transcribed into ASCII): Azerbaycan dili Reference to published description of the language (book or article): Azerbaijani is customarily written in multiple scripts. It is often required, when matching languages, to select a subset of documents written in a particular script. When looking up language resources, this is even more important, so that text in different scripts is not mixed. References: (created 2003-05-30) []


text:
It seems like we can find almost everything we need through Google Maps — even the best place to put a new wind farm or a solar power plant. Renewable energy prospectors can now assess potential sites with the click of a mouse using 3TIER's high-resolution maps of the earth's solar radiation, wind speeds and hydro power capacities. The company showed off its new seamless, high-resolution solar map of the western hemisphere this week at the International Solar Power conference.
3TIER is working on mapping the entire world with its "REmapping the World" initiative which it hopes will help developing countries assess their renewable energy resources and "leap frog" past fossil fuels. Many of the places that need renewable energy the most don't have the resources to synthesize millions of satellite photos. 3TIER offers a free look on their web site for consumers and sells comprehensive, custom full site analysis reports, complete with GIS data layers to energy developers.
3TIER says its new solar maps offers three times the resolution of existing industry standards. And while you might have thought sunlight just beams straight down, 3TIER's solar map displays information on global horizontal irradiation, direct normal irradiation and diffuse irradiation so you can tell how much radiation might actually power your panels. The wind energy map also provides a huge amount of detail and clicking through the wind velocity at elevations of 20, 50 and 80 meters quickly illustrates that higher speed winds are higher up in the atmosphere.
Founded in 1999, 3TIER displays its data using Google Maps, which makes us wonder: What if Google were to acquire 3TIER? It could be a perfect fit. Google.org has made investments in solar and wind energy companies which could certainly make use of high-resolution energy maps. 3TIER's maps could perfectly compliment Google's recent grant to Southern Methodist University Geothermal Laboratory to update a very similar geothermal energy map. And Google Earth has been adding layers of data about renewable energy for quite some time now. But then again, we're still waiting for Google to acquire the Earth2Tech portfolio of green maps.
Images courtesy of 3TIER.


text:
Microsoft Office Questions and Answers - How to Insert Text Into Clip Art
Sandi writes in with an Office question
Question:I need to know how to insert text into a clip art object. I am very new to using clip art.
Answer: To install clipart into a document simply add the clipart first then make a text box with whatever text you want inside the text box. You can insert a text box by going to Insert and then Text Box. Once you have the text formatted inside the box you can double click the outside border of the text box to bring up its properties. Then you can change the fill color to No Fill so that the text box will be transparent. You can do the same for the Line section by changing it to No Line. Then you will have only the text showing and you can drag it wherever you want on top of the clipart. You can also change the text color if needed.


text:
grounder in a sentence
Example sentences for grounder
It is as much a part of the game as a grounder taking a bad hop.
Hitting high or low will determine if the ball is a grounder or a fly ball.
You're playing shortstop and the batter hits a grounder to you.


text:
PET buster offers students thorough preparation for the Cambridge English: Preliminary (PET) examination based on the language elements listed in the PET lists.
Coursebook + Audio CD
- 16 units developing the four language skills.
- Vocabulary-building using topics listed by Cambridge English.
- Section dedicated to hints and suggestions for success at the exam.
- Audio CDs with recordings for all listening-based tasks.
- With key and without key version.
- Complete lists of structures, functions and vocabulary for each unit.
- Full answer keys to all exercises and activities.
- Transcripts of all recorded material.
- Ideas for extra extension and revision exercises.
view full list of components with ISBN Numbers.


text:
First ever direct measurement of the Earth's rotation
Geodesists are pinpointing the orientation of the Earth's axis using the world's most stable ring laser
A group with researchers at the Technical University of Munich (TUM) and the Federal Agency for Cartography and Geodesy (BKG) are the first to plot changes in the Earth's axis through laboratory measurements. To do this, they constructed the world's most stable ring laser in an underground lab and used it to determine changes in the Earth's rotation. Previously, scientists were only able to track shifts in the polar axis indirectly by monitoring fixed objects in space. Capturing the tilt of the Earth's axis and its rotational velocity is crucial for precise positional information on Earth – and thus for the accurate functioning of modern navigation systems, for instance. The scientists' work has been recognized an Exceptional Research Spotlight by the American Physical Society.
The Earth wobbles. Like a spinning top touched in mid-spin, its rotational axis fluctuates in relation to space. This is partly caused by gravitation from the sun and the moon. At the same time, the Earth's rotational axis constantly changes relative to the Earth's surface. On the one hand, this is caused by variation in atmospheric pressure, ocean loading and wind. These elements combine in an effect known as the Chandler wobble to create polar motion. Named after the scientist who discovered it, this phenomenon has a period of around 435 days. On the other hand, an event known as the "annual wobble" causes the rotational axis to move over a period of a year. This is due to the Earth's elliptical orbit around the sun. These two effects cause the Earth's axis to migrate irregularly along a circular path with a radius of up to six meters.
Capturing these movements is crucial to create a reliable coordinate system that can feed navigation systems or project trajectory paths in space travel. "Locating a point to the exact centimeter for global positioning is an extremely dynamic process – after all, at our latitude, we are moving at around 350 meters to the east per second," explains Prof. Karl Ulrich Schreiber, meanwhile as station director of the geodetic observatory Wettzell where the ring laser is settled. Karl Ulrich Schreiber had directed the project in TUM's Research Section Satellite Geodesy. The geodetic observatory Wettzell is run together by TUM and BKG.
The researchers have succeeded in corroborating the Chandler and annual wobble measurements based on the data captured by radio telescopes. They now aim to make the apparatus more accurate, enabling them to determine changes in the Earth's rotational axis over a single day. The scientists also plan to make the ring laser capable of continuous operation so that it can run for a period of years without any deviations. "In simple terms," concludes Schreiber, "in future, we want to be able to just pop down into the basement and find out how fast the Earth is accurately turning right now."
For more information please visit the TU München homepage _URL_


text:
Simple Timetabling Problem.
Simplified model for timetabling problems consisting of a set of
resources, a set of activities, and a set of dependencies between the
activities. Time is divided into time slots with the same duration.
Every slot may have assigned a constraint, either hard or soft: a hard
constraint indicates that the slot is forbidden for any activity, a
soft constraint indicates that the slot is not preferred. We call
these constraints �time preferences�. Every activity and every
resource may have assigned a set of time preferences, which indicate
forbidden and not preferred time slots.
Activity (which can be, for instance, directly mapped to a lecture) is
identified by its name. Every activity is described by its duration
(expressed as a number of time slots), by time preferences, and by a
set of resources. This set of resources determines which resources are
required by the activity. To model alternative as well as required
resources, we divide the set of resources into several subsets �
resource groups. Each group is either conjunctive or disjunctive: the
conjunctive group of resources means that the activity needs all the
resources from the group, the disjunctive group means that the
activity needs exactly one of the resources (we can choose from
several alternatives). An example can be a lecture, which will take
place in one of the possible classrooms and it will be taught for all
of the selected classes. Note that we do not need to model conjunctive
groups explicitly because we can use a set of disjunctive groups
containing exactly one resource instead (the set of required resources
can be described in a conjunctive normal form). However, usage of both
conjunctive and disjunctive groups simplifies modelling for the users.
Resource is also identified by its name and it is fully described by
time preferences. There is a hard condition that only one activity can
use the resource at the same time. For instance, such resource can
represent a teacher, a class, a classroom, or another special resource
at the lecture timetabling problem.
Finally, we need a mechanism for defining and handling direct
dependencies between the activities. It seems sufficient to use binary
dependencies only that define relationship between two activities. We
defined three temporal constraints: the activity finishes before
another activity, the activity finishes exactly at the time when the
second activity starts, and two activities run concurrently (they have
the same start time).
The solution of the problem defined by the above model is a timetable
where every scheduled activity has assigned its start time and a set
of reserved resources that are needed for its execution (the activity
is allocated to respective slots of the reserved resources). This
timetable must satisfy all the hard constraints, namely:
every scheduled activity has all the required resources reserved,
i.e., all resources from the conjunctive groups and one resource
from each disjunctive group of resources,
two scheduled activities cannot use the same resource at the same
no activity is scheduled into a time slot where the activity or
some of its reserved resources has a hard constraint in the time
all dependencies between the scheduled activities must be
Furthermore, we want to minimize the number of violated soft
constraints in the time preferences of resources and activities. We do
not formally express this objective function; these preferences will
be used as a guide during the search for the solution.


text: In June 2011, Apache AH Mk1 Helicopters of the British Army's 656 Sqn conducted their first raid on Libya, using as their base the Royal Navy's helicopter Carrier HMS Ocean. The Apaches went on to destroy 100 targets over a five month period, all the while based on board the ship. Meanwhile civil operators fly regularly to and from oil platforms and ships in the North Sea, covering large distances overwater, and dedicated naval helicopters are based aboard ships in the most demanding of maritime environments for months at a time. "Marinisation" may be considered the task of making a helicopter platform and its support system capable of operating in the maritime environment, including overwater and to and from ships. This paper explores the stages of marinisation of a helicopter, from the fundamental issues affecting aircraft operating in this environment, to the specification of requirements, through design and testing to declaration of operating limits. A number of case studies are presented showing how different designs have been tailored to meet customer objectives. In addition AWs aspirations for improving maritime operational capability in the future are discussed.


Meta Battle Subway PokeBase - Pokemon Q&A
What is the origin of Arceus' name?
2 votes
I know arc as in High
asked Apr 21, 2011 by Ike,Lloyd Irving
good question
1 Answer
1 vote
Best answer
Arceus's name may come from the words arch (highest) and deus, which is Latin for god. It may also have a root in the Latin word arcanus, which means secret; sacred mystery. Arceus's name may also come from the word archaic (ancient), which comes from the Greek arkhaios, and is derived from the ancient Greek word for "beginning", arkhē. It could have also come from the Latin word archetypus (original). Alternatively, Arceus's name can be seen as a portmanteau of Zeus, the most powerful of Greek gods and arch (highest). Another theory may be the combination of Zeus and Ra spelled backwards (Zeus being the king of gods and Ra being the solar god and creator, albeit in different pantheons). Those two qualities are shared by the Pokémon. Also, Arceus can also be derived from aureus (golden), possibly referring to its hooves and wheel. Nevertheless, Arceus's name origin and possible theories have led fans to believe that Arceus may be in fact a creator deity in Pokémon form. Arceus's name is pronounced with a soft "c" (or "s" sound) by the announcer in Pokémon Battle Revolution; in keeping with its probable name origin, it is pronounced with a hard "c" (or "k" sound) in television commercials and in Arceus and the Jewel of Life. Its name could also come from arc, as in round/ring, since it's surrounded by one.
-From Bulbapedia
answered Apr 21, 2011 by trachy
Thanks for not plagurizing trachy amessage from the foundation for a beter life pass it on
Proper grammar makes for a better life too. ;)
Wrong Arceus is the false japanese god of pokemon
In alchemy, Archeus, or archaeus, is a term used generally to refer to the lowest and most dense aspect of the astral plane which presides over the growth and continuation of all living beings. I'm guessing that they just used a bit of Latin, changed it up, and tied it in a bit more. It's an etyomology SF, so there's no way to tell which one is absolutely right. Besides, it's just a game.
it also may have something to do with the greek word αρχαίο(archeo) which mean ancient.


What is the X in X-mas?
not enough room to swing a cat
Very little space, cramped quarters, as in There's not enough room to swing a cat in this tent. This expression, first recorded in 1771, is thought to allude to the cat-o'-nine-tails, or "cat," a whip with nine lashes widely used to punish offenders in the British military.
The American Heritage® Idioms Dictionary
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text:
Philippa Ryan, Scientist, British Museum
Archaeobotany is the study of ancient plant remains, and I joined the field team at Amara West in Sudan earlier this year to collect samples for archaeobotanical analysis. Charred plant materials were retrieved on-site from sediments through dry-sieving and flotation. These samples were subsequently brought back to the British Museum for further sorting and identification.
At the moment I am analysing the charred seeds and fruits with Caroline Cartwright, who is also analysing the wood charcoal. The macroscopic plant remains are analysed using both a stereo microscope and a SEM (scanning electron microscope). Charred remains found so far include cereal grains (wheat and barley) and crop-processing waste, fruits such as figs and a wide range of wild plants.
I am also processing sediment samples to extract phytoliths (microscopic plant remains), which are formed when soluble silica taken up in groundwater by plants is deposited within and between certain plant cells. These silicified cells are found within many different plant families such as grasses (which include cereals), sedges and palms.
Phytoliths are difficult to identify, but have the advantage of surviving in both charred and non-charred contexts, so we can learn about the presence and use of plants in areas where seeds and grains don't survive.
At the moment, I am processing sediments to extract phytoliths, which includes the removal of carbonates, clays, organics, other remaining non-siliceous material through heavy liquid flotation, and finally mounting dried phytoliths onto slides. Phytoliths are then identified and counted using an optical (light) microscope.
Analysis of these different types of plant remains helps us learn about the past uses of plants at Amara West in day-to-day life, such as for food, fuel and animal fodder. I am also looking at the distributions of seeds and phytoliths across the site to examine locations of plant based activities such as food processing, as well as whether there are any differences in diet between poorer and richer households, or across the history of the site.
Plant remains can also help to provide information about the nearby vegetation, for instance the types of grasses, wetland plants and trees that grew near the ancient town.


text:
From Ohio History Central
The National Negro Bowling Association (NNBA), the predecessor of the National Bowling Association, was formed on August 20, 1939, in Detroit, Michigan.
In the 1930's, most bowling organizations restricted membership to white people. A group of African Americans formed their own association. The NNBA held its first tournament in Cleveland, Ohio, in 1939. The organization included teams from Detroit, Michigan; Cleveland, Ohio; Cincinnati, Ohio; Columbus, Ohio; Toledo, Ohio; Indianapolis, Indiana; Chicago, Illinois; and Racine, Wisconsin. Teams from other parts of the United States joined the association, but bowlers from Cleveland, Chicago, and Detroit dominated the league until the 1950s.
In 1944, the NNBA became known as the National Bowling Association. The Association welcomed people of all races but African Americans continued to dominate the group's membership. One of the organization's presidents during the 1950s was William DeHart Hubbard, an African-American sports legend from Cincinnati. In 1951, the two other major bowling organizations, the American Bowling Congress and the Women's International Bowling Congress, also stopped excluding people from membership on the basis of race and allowed whites and blacks to compete in the same events. A principal reason for this change was legal pressure from the National Association for the Advancement of Colored People and the National Bowling Association.
The National Bowling Association continues to exist today. In 2007, the organization had a membership of thirty thousand adult members. The association also oversaw approximately five hundred separate leagues within the United States.


Tuesday, August 9, 2011
Imprelis Recall Shows Limits of Registration Process
_URL_ Describes stop sale EPA issued August 11, and notes that 7,000 incident reports have been filed with EPA since June by the Manufacturer.
_URL_ Additional notes on the issue as well as some discussion about the label limitations on Imprelis regarding use of treated clippings in compost.
Gail Gardner said...
What I would like to know is why there is a labeling restriction indicating that grass clippings treated with this product NOT be composted.
A Dupont product representative indicated on another site that the product is effective for 44 days. Since composting is generally done for at least four months, why is there a restriction?
Besides killing trees which our environment and our health can ill afford, this product ending up in community composting projects could be disastrous - IF it is survives composting which they indicated it does.
Communities that recycle chipped trees, leaves and branches would have no way of knowing which ones were treated. When that compost gets applied to gardens, farms and yards it could kill whatever you plant.
This specific question needs to be answered clearly and exactly how long this product can actively kill plants needs to be studied.
IF this product can survive composting, all communities with public programs need to be notified and there needs to be major media coverage to let people know BEFORE they damage their soil for who knows how long.
Mike Merchant, PhD said...
Gail, good questions. Imprelis is not the only herbicide that warns against composting treated grass clippings. I don't know the full answer to your questions, but suggest you direct them to the consumer hotline for DuPont--those numbers should be on the label.
Knowing a little about label warnings, I suspect the restrictions are based on a highest risk scenario where clippings are composted, not diluted with other compost, and the finished compost tested and found to inhibit the growth of some plants. In municipal settings the risk of having high percentages of herbicide treated clippings is very low, hence low risk. Nevertheless, if users follow the label instructions not to compost the clippings, everything should be cool.


" preterites evolved through regular sound change from their Latin ancestors as follows:
SAPUI > saupi > Old Spanish sope
CAPUI > caupi > Old Spanish cope
POTUI > pouti > pudi > Old Spanish pude
POSUI > pousi > pusi > Old Spanish puse
Note that of all of these Old Spanish preterites, only those of poder and poner had the vowel u in their stem. It was the preterite of these two verbs, and in particular, pude, that influenced the final change in all the others. That is, pude (and perhaps puse) caused Old Spanish ove, tove, estove, sope, and cope to shift to uve (now spelled hube), tuve, estuve, supe, and cupe.
QUESTION: Why is veía, and not *vía, the imperfect form of ver?
Because in Old Spanish the verb was veer, like leer and creer. Thus we have in modern Spanish veía, like leía and creía. Old Spanish veer later contracted to ver, while leer and creer have not.
QUESTION: Why are era, eras, etc. the imperfect forms of ser, and iba, ibas, etc. the imperfect forms of ir?
Because both sets of forms continue the Latin paradigms with very little, though regular, sound change, as shown below:
ESSE "to be" ser
ERAM ERAMUS era éramos
ERAS ERATIS > eras erais
ERAT ERANT era eran
IRE "to go" ir
IBAM IBAMUS iba íbamos
IBAS IBATIS > ibas ibais
IBAT IBANT iba iban
QUESTION: Why do the present tense forms of ir look like forms of the -ar verbs?
The present tense of this verb is actually made up of forms from two different Latin verbs, namely, IRE "to go", and VADERE "to go quickly". Some of the forms of IRE became, through regular sound change, too short, and were replaced by forms of VADERE. The forms of VADERE should have actually evolved like those of CADERE (Spanish caer "to fall"), yielding *vaes, *vae, etc., but did not. Instead, because of analogy with forms of the verb DARE "to give", Spanish dar, we find in the earliest Old Spanish texts, the forms vo, vas, va, and van (like Old Spanish do, das, da, dan from Latin DO, DAS, DAT, DANT). In fact, in Old Spanish, the entire paradigm was: vo, vas, va, imos, ides, van, showing two other forms originally from IRE, namely, imos < Latin IMUS, and ides < Latin ITIS. These were eventually replaced by vamos, vais (in the mid-15th century). The only other change from there was Old Spanish vo > modern Spanish voy, explained below.
QUESTION: Why do the verbs voy, soy, doy, and estoy end in -y?
These forms descended from Latin SUM, VADO, DO, STO, which, through regular sound change, evolved to so, vo, do, estó in Old Spanish. The syntactic combinations of these verbs with the postposed subject pronoun, i.e., so yo, do yo, vo yo, estó yo, eventually produced articulations such as soy yo, doy yo, voy yo, estoy yo, while they remained unchanged if the pronoun came before or did not appear at all. After many generations, however, the verbs themselves, that is, even without the postposed subject pronoun, were reinterpreted by speakers as soy, doy, voy, estoy. The reason why this did not occur with other verbs, for example, digo yo, creo yo, etc., is because the final -o of these is unstressed, whereas the final -o of Old Spanish so, vo, do, estó was indeed stressed. It was the stressed nature of the final vowel of these forms that attracted an element of the pronominal form yo to them.
QUESTION: Why do all three conjugations (-ar, -er, -ir) have the same endings in the future? (This phenomenon applies to Portuguese, French, and Italian as well.)
Because, historically, the future forms are really a combination of the infinitive + the verb haber (Old Spanish aver). Haber was often used in place of, or where one would expect in modern Spanish, tener. If one said he/she had to do something, this obligation carried an implied futurity. There was then a shift in meaning: hablar (h)é con él "I have to speak with him" > "I will speak with him".
QUESTION: Why do some verbs, like morir, poner, escribir, etc., have irregular past participles?
Because these were "irregular" in Latin. For example, the forerunner of Spanish escrito was Latin SCRIPTUM, which evolved regularly as follows:
SCRIPTUM > iscriptu > escritto > escrito
Note the English derivatives, scripture, script, manuscript (manu "hand" + script "written").
We provide below a list of the most common "irregular" past participles of Spanish along with their Latin ancestors and English derivatives:
Infinitive Spanish Latin English derivatives
Morir muerto MORTU(U)M mortuary, mortician
Poner puesto POS(I)TUM position, posit, post
Ver visto VIS(T)UM vision, visor, visual
Infinitive Spanish Latin English derivatives
Escribir escrito SCRIPTUM scripture, (manu)script
Abrir abierto APERTUM aperture, apertural
Romper roto RUPTUM rupture, errupt
Through the Latin connection and association with the English derivatives, students may more readily remember the -t- or -st- element of the past participle, thus avoiding the common errors *morido, *ponido, *escribido, etc.
QUESTION: Why does Spanish have the letter h if it is never pronounced?
There are three reasons.
First, Latin had some words that began with h-, and this letter was pronounced as it is in English. It soon ceased to be pronounced, so that the Latin words beginning with this letter appear in the oldest Spanish texts without it. For example, Latin HABERE "to have" > Old Spanish aver. The h- was eventually replaced to make these Spanish words look more like Latin in the hope that Spanish would attain the same level of prestige. Thus, Old Spanish aver, for example, was given a new spelling, haber (note that the b, which has changed to v in some texts and u in others, was also replaced.).
Second, many Latin words that began with f- underwent a change from Old to modern Spanish in which this sound came to be pronounced like h, and eventually, like the original Latin H, not at all. For example, FABULARE "to tell fables" > Old Spanish fablar "to speak" > Late Medieval Spanish hablar (in which the h was pronounced like the h of English) > modern Spanish hablar (in which the h is no longer pronounced). The now silent h- has simply been retained.
Third, in Old Spanish, the letter u could represent either a vocalic or consonantal element. Thus, the Old Spanish spelling, ueuo, could have represented either the word for "egg", or "I drink". In order to indicate that the word-initial u- was a vowel, scribes adopted the practice of adding a silent h- (which was never part of the Latin spelling). Thus, ueuo, when meaning "egg" (< Latin OVUM), was later written hueuo to indicate the vocalic nature of the u-, and eventually, huebo. The word ueuo, when meaning "I drink", was eventually respelled bebo, again, to give it a more Latin look, cf. Latin BIBO "I drink". Another example is Latin OSSUM "bone" > Old Spanish ueso (which could also be pronounced like beso "kiss") > hueso.
One notes that French also employed h- for the same reason: Latin OCTO "eight" > Old French uite (which was also the old spelling for modern French vite "quickly") > modern French huite "eight".


text:
Definitions for mendicantˈmɛn dɪ kənt
Random House Webster's College Dictionary
men•di•cantˈmɛn dɪ kənt(adj.)
begging; living on alms.
pertaining to or characteristic of a beggar.
of or pertaining to various religious orders, as the Dominicans or the Franciscans, that combine the monastic life with an active ministry in teaching or preaching and that originally owned neither personal nor community property, living chiefly on alms.
(n.)a person who lives by begging; beggar.
a mendicant friar.
Origin of mendicant:
1425–75; < L mendīcant-, s. of mendīcāns, prp. of mendīcāre to beg, der. of mendīcus beggarly; see -ant
men′di•can•cy-ˈdɪs ɪ ti(n.)
men•dic′i•ty-ˈdɪs ɪ ti(n.)
a male member of a religious order that originally relied solely on alms
a pauper who lives by begging
A pauper who lives by begging.
A religious friar forbidden to own personal property who begs for a living.
Depending on alms for a living.
Of or pertaining to a beggar.
Of or pertaining to a member of a religious order forbidden to own property, and who must beg for a living.
Origin: From mendicans, present participle of mendico. Compare French mendiant.
practicing beggary; begging; living on alms; as, mendicant friars
a beggar; esp., one who makes a business of begging; specifically, a begging friar


How do I create ringtones using the Ringtone Maker app on my Lumia device?
Start the Ringtone Maker application.
 1. Select Pick a song (or make another)
 2. Select one of the songs from your music library
 3. Select length and position of the ringtone (for example, 1 second for notifications).
 4. Select Save and type the name of the new tone. Optionally, you can also select Make this my ringtone.
Ringtones you make are saved in Settings > ringtone+sounds. Use them to personalize your notification alerts, whether it's calls, SMS, emails, voicemail, reminders or your alarm clock.


text:
Two Faces or One? Our visual system constantly imposes three-dimensional characteristics onto two-dimensional images. While our interpretations of these images are usually correct in ambiguous situations with more than one possible image our brain may not see all of the possibilities. In such situations there are many factors simultaneously influencing our vision. Below are a few pictures that will help demonstrate this point.
Image #1 Man playing horn or woman shillouette?
Hint: Woman s right eye is the black speck in front of the horn handle.
Image #2 Two faces or one?
Hint: Two faces side profile and one face front view.
Image #3 A face of a native american or is it an eskimo?
© Copyright _URL_ 3ConX Corp. 2011


text:
Objective: To describe a technique for treating pyometra in dogs using a 3-portal laparoscopic-assisted ovariohysterectomy (LAOVH) and evaluate outcome. Study Design: Retrospective case series. Animals: Dogs (n=12). Methods: Dogs with open or closed-cervix pyometra with moderately sized (1-4cm) uterine horn diameters based on preoperative ultrasonography and no evidence of perforation were included in the study. A 3-portal technique for LAOVH was used. A wound retraction device was inserted into the caudal portal after enlargement of the incision to 3-4cm to simplify removal of the uterus with minimal tension. Results: Twelve dogs (median weight, 23.3kg; range, 2.1-46.0kg) met the inclusion criteria. Median uterine diameter was 3.0cm (range, 1.2-4.0cm). Median surgical time for LAOVH was 107minutes (range, 82-120minutes). Complications included mild hemorrhage from the uterine vessels in 1 dog during uterine removal through the wound retraction device and intra-abdominal uterine rupture in 1 dog which necessitated conversion to an open approach. All dogs recovered from surgery and were discharged. Conclusions: LAOVH can be used for treatment of select cases of canine pyometra. Careful case selection is mandatory to improve success and minimize conversion to an open approach. Gentle handling of the reproductive organs is imperative to avoid iatrogenic uterine rupture.
ASJC Scopus subject areas


[マウスの生殖能力に対するMg2+サイクロトロン周波数電磁界の影響] med./bio.
The Effect of Electromagnetic Fields with the Mg2+ Cyclotron Frequency on Mouse Reproductive Performance.
掲載誌: J Electromagn Anal 2016; 8 (3): 115-123
この研究は、Mg2+のサイクロトロン周波数（およそ60 Hz）の周波数の低レベル磁界（≅50 μT）への100日間の連続ばく露がマウスの生殖に及ぼす影響を調べた。雌4匹と雄1匹を1グループとして、ばく露群（4グループ）および対照（1グループ）で影響を比較した。その結果、ばく露群での1出産当たりの新生仔の数は、対照に比べ有意に低かった；各グループで平均した新生仔の11日齢での体重は、対照に比べ、ばく露群で有意に低かった；解剖後検査で、仔マウスでの軽度肝臓炎症所見、および母マウスでの心筋肥大発生率が対照に比べ、ばく露群で有意に高かった､と報告している。
The effects of exposure of mice to a 60 Hz magnetic field on reproductive performance should be investigated.
The applied frequency (about 60 Hz) matches the cyclotron frequency of Mg2+. The authors hypothesized that this frequency would be likely to have an effect on reproduction performance, as Mg2+ plays an important role in cell division.
Mice were divided into 2 groups: exposure group (divided into 4 subgroups, each consisting of 4 female and 1 male mouse) and control group (4 female and 1 male mouse).
Blood samples of adult mice were taken after 100 days of exposure. Newborn mice were killed 11 days after birth and adults were killed after exposure for histological examinations.
ばく露 パラメータ
ばく露1: 60 Hz
ばく露時間: continuous for 100 days
周波数 60 Hz
 - magnetic field
 - sinusoidal
ばく露時間 continuous for 100 days
Additional information cyclotron frequency of Mg2+
チャンバの詳細 cages made of polypropylene with ceilings made of a meshed stainless steel
ばく露装置の詳細 6 coils with a radius of 380 mm and which were spaced 380 mm apart in a Helmholtz configuration; the total length of the exposure space was 1.9 m; each of the coils was made of glass fiber, with copper wire windings wrapped within carbon fiber; each subgroup was housed in a single cage placed between the coils; environmental conditions were controlled, e.g., environmental temperature of 21°C ± 1°C and humidity between 40% and 70%
測定量 種別 Method Mass 備考
磁束密度 38 µT minimum 測定値 - -
磁束密度 47 µT maximum 測定値 - -
 - ばく露中
 - ばく露後
The average number of offspring per birth was significantly lower in exposed dams compared to the control group and a significantly lower average daily gain of body weight per mouse was observed in exposed pups compared to the control group 7 and 11 days after birth, resulting in a significant reduction of the average body weight per nest.
In hematological and biochemical analysis of the blood of adults, the only changes were a significantly reduced number neutrophils and lymphocytes in exposed mice compared to the control group.
Histopathological examinations revealed a significant increase in mild chronic hepatic inflammatory findings in the offspring and a significantly increased occurrence of myocardial hypertrophy in the dams of the exposure group compared to the control group. However, splenic follicular hyperplasia was significantly higher in the control group than in the exposure group.
The authors conclude that exposure of mice to a 60 Hz magnetic field might have a weak detrimental effect on reproductive performance.


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Nursing Home Defense Strategies
Thursday, June 17, 2021
1:00 p.m. - 2:30 p.m. ET
10:00 a.m. - 11:30 a.m. PT
This CLE webinar will review nursing home litigation defense strategies to counter the plaintiff's theories for frequently alleged injuries, such as pressure sores, falls, malnourishment, medication errors, neglect, or infection. The program will help counsel anticipate and curb plaintiffs' discovery and deposition strategies, mount defenses to liability, and navigate around the plaintiff's attacks on unavoidability, comorbidities, third-party fault, and failure to thrive. The program will also address when and how to invoke the Public Readiness and Emergency Preparedness (PREP) Act.
Litigation is inevitable for almost all long-term care facilities. Defense counsel must anticipate plaintiff strategies that often revolve around nursing homes and medical professionals' noncompliance with complex and elaborate regulations, internal procedures, or best practices.
Defense counsel must prepare to address broad discovery requests and scores of deposition notices as plaintiffs seek gaps or inconsistencies in medical records, care plans, and nurses' notes. A facility's best defense may be a strong documentary record.
Nursing home counsel should understand PREP Act and other defenses for cases related to or arising from the COVID-19 pandemic.
Listen as our authoritative panel of practitioners provides an overview of nursing home laws and regulations, discusses common types of injuries, and covers how to handle medical records and other discovery issues unique to these cases.
 1. Relevant laws, regulations, surveys
 2. Pleading and affidavit requirements
 3. Common types of injuries
 4. Common defenses and plaintiff strategies
 1. Demonstrating compliance with regulations
 2. Unavoidability
 3. Comorbidities
 4. Third-party fault
 5. The role of survey data
 5. Independent actor vs. enterprise negligence
 6. PREP Act
The panel will review these and other crucial issues:
 - Can a case be won or lost at a deposition?
 - Are the burdens of proof different under some statutory schemes than regular negligence?
 - How does counsel show the defendants provided all reasonable care?
 - What is the effect of state laws and PREP Act on defense strategies?
Ken Yood, Partner and Member, Healthcare Team at Sheppard Mullin will serve as a co-panelist.
Mr. Yood represents a wide range of healthcare providers and healthcare companies, including specialty and general acute hospitals (including local district, nonprofit and for-profit facilities), home health agencies, specialty pharmacy and infusion centers, pharmaceutical vendors, nursing facilities, and health information and management providers.
Click here for more information, including CLE credits by state and registration. (Early Registration Discount Deadline, Friday, May 28, 2021)
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text:
We study fundamental groups of projective varieties with normal crossing singularities and of germs of complex singularities. We prove that for every finitely-presented group G there is a complex projective surface S with simple normal crossing singularities only, so that the fundamental group of S is isomorphic to G. We use this to construct 3-dimensional isolated complex singularities so that the fundamental group of the link is isomorphic to G. Lastly, we prove that a finitelypresented group G is Q-superperfect (has vanishing rational homology in dimensions 1 and 2) if and only G if is isomorphic to the fundamental group of the link of a rational 6-dimensional complex singularity.
|Original language||English (US)|
|Number of pages||24|
|Journal||Journal of the American Mathematical Society|
|State||Published - Oct 1 2014|
All Science Journal Classification (ASJC) codes
- Applied Mathematics


Chegg Guided Solutions for Water Resources Engineering 2nd Edition: Chapter 18.3
Chapter: Problem:
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 - Step 1 of 1
 6534-18.3-1P AID: 1825 | 08/02/2013
 Find the critical shear stress by using the formula
 Denote Specific weight of sediment particle as, Specific weight of water as, Specific gravity as g, Sand size as, Critical shear stress as, and actual shear stress as
 Use the shields formula to compute from shields diagram
 From shields diagram the value is taken as 0.065
 Find the critical shear stress by substituting the values of 2.65 for, for
 Therefore, the critical shear stress is
 Find the actual shear stress using the formula
 Denote Depth of wide rectangular channel as y (R=y)
 Find the actual shear stress by substituting the values of 2.5 m for R, 9810 kg/m3 for γ, and 0.0003 for S
 Therefore, the actual shear stress is
 The actual shear stress is much larger than the critical shear stress; transport of the fine sand particles is expected.
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text:
was a Dadaist
and writer. He was born on April 6
and died on February 1
, near Locarno[?]
. One of the founders of the Dada movement, he was active in Zurich
, Switzerland from 1916 to 1920. He moved to the United States in 1940 and became an American citizen.
Richter was also the author of a first-hand account of the Dada movement titled Dada: Art and Anti-Art.
Hans Richter was also the name of a well known German conductor (_PHONE_). He is noted as one of Richard Wagner's greatest champions.
All Wikipedia text
is available under the
terms of the GNU Free Documentation License


text:
Tom Johnson (University of York) has published the following article: "Soothsayers, Legal Culture, and the Politics of Truth in Late-Medieval England," Cultural and Social History (published online on 31 Aug. 2020). Here's the abstract:
Soothsaying or divination has generally been understood by historians within the context of magic, popular culture, and lay religion. This article considers what it might be able to tell us about legal culture in late-medieval England. It argues that soothsayers not only offered people an alternative to the pursuit of justice in law-courts, but also different means of conceiving what justice was: they did not necessarily aim at the conclusion of peace between parties, but rather claimed to unveil the truth. Elaborating this comparison, it argues that this casts a different light on the publicity of late-medieval legal culture.
Further information is available here.


text:
Kindness matters – if a child wants to be happy and popular, researchers say.
Preteens assigned to do three acts of kindness a week found they were better liked than kids who were assigned to visit three places of their choice a week, the researchers from UC Riverside and the University of British Columbia wrote Wednesday in the journal PLoS One.
"Increasing peer acceptance is a critical goal, as it is related to a variety of important academic and social outcomes, including reduced likelihood of being bullied," the researchers wrote.
They say it's the first study to link performance of a simple helping behavior to an increase in popularity. Previous studies have shown that there's a link between happy people and popular people, and that happy people are more likely to do helpful or kind things.
The researchers divided 19 classrooms of children ages 9 to 11 in Vancouver into two groups: one assigned to kind acts, one to visit places for four weeks. The children then answered surveys about their weeks. Kind acts included "vacuumed the floor" and "gave my mom a hug when she was stressed by her job." Visits included the shopping center and "baseball diamond."
Both groups showed increases in positive effect and satisfaction. But the kind acts group increased "significantly more than those who visited places" in the measure of popularity, gaining an average of 1.5 friends.
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