Michael DiPietro stayed close to home when it came to selecting the suit the 18-year-old Amherstburg native will wear in the stands at this year's NHL Draft, which takes place Friday and Saturday in Chicago.
AMHERSTBURG – While he cannot control how the NHL Draft will play out, Windsor Spitfires goalie Michael DiPietro is firmly in charge of how he will look for the event.
The 18-year-old Amherstburg native stayed close to home when it came to selecting the suit he will wear in the stands at the draft, which takes place Friday and Saturday in Chicago.
DiPietro went to 67 Richmond to have his suit done by owner Peter Leardi.
"It's something I've always wanted to do," DiPietro said. "I've always dreamt of getting a suit for myself strictly for the draft. Bringing my dad (Vic) in, and him being part of the process.
DiPietro's request for a special suit was not a unique for Leardi, who handled the same duty in 2014 for Belle River's Aaron Ekblad — the first pick overall that year by the Florida Panthers.
Ekblad came in and became a regular whenever he was in need of a suit for a special occasion.
"Every time Aaron would need a new suit, he'd call me up," Leardi said.
Former Spitfires and current NHL head coaches Paul Maurice, who is with the Winnipeg Jets, and Peter DeBoer, who is with the San Jose Sharks, also sought out Leardi for suits.
DiPietro is more like family.
"I knew Mike when he was in diapers," Leardi said. "His birth mother worked for me and I did (his dad) Vic's wedding suit. There was a connection there. I've known his uncles for years and went to school with them.
The whole process took weeks to bring together.
Like Ekblad, he opted for blue.
"It's the hot colour," Leardi said. "It's been a strong, strong colour for a couple of years now.
From there, it was a matter of making sure the fit and look were exactly what DiPietro was looking for.
"Make sure the tailoring is right, nip and tuck and those little things," Leardi said.
The pants had to be opened five-eighths of an inch to accommodate his calves, and while the shirt fit his neck, it had to be taken in two inches on the sides for a perfect fit.
On the mantel, behind the counter at 67 Richmond, is a shot of Ekblad in his suit as well as Maurice behind the bench. Leardi plans on making room for a shot of DiPietro as well.
"I like to keep the trend going for first-rounders," DiPietro said of Ekblad going in the first round after getting a suit from Leardi. "I'd like to see their streak keep going.
When: Round 1 is Friday at 7 p.m. and Rounds 2 through 7 are Saturday at 10 a.m.
Television: Sportsnet will carry all seven rounds.
Local connections rated: Windsor Spitfires Gabriel Vilardi, Michael DiPietro, Luke Boka and Cole Purboo along with Tecumseh's Jack Studnicka, who plays for the Oshawa Generals.


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Q: How to access grayscale values of an image with Vimba.c API? I'm using the Vimba API for c language. I'm having trouble to access the grayscale values of the image that I'm capturing with the camera. I'm also using the VisualStudio for the first time, since it was advised by Vimba, not sure why.
I was updating the SynchronousGrab example provided by Vimba, adding a pixel analysis after capturing the image and before printing the image to a bitmap. That pixel analysis consists of finding, in a dark grayscale image, the centroid of the lighter "cloud" of pixels.
Relevant declarations:
VmbError_t SynchronousGrab( const char* pCameraID, const char* pFileName, int threshold )
{
VmbFrame_t          frame;                                  // The frame we capture
VmbUint32_t         j                   = 0;                //CUSTOM
VmbUint32_t         k                   = 0;                //CUSTOM
unsigned char*      CurSrc              = 0;                //CUSTOM
int                 arraysize           = 0;                //CUSTOM
float*              coordY              = 0;                //CUSTOM
float*              coordX              = 0;                //CUSTOM
float*              intensity           = 0;                //CUSTOM
float               centroid_x          = -1;               //CUSTOM
float               centroid_y          = -1;               //CUSTOM

And the VmbFrame_t struct:
typedef struct
{
    //----- In -----
    void*               buffer;             // Comprises image and ancillary data
    VmbUint32_t         bufferSize;         // Size of the data buffer

    void*               context[4];         // 4 void pointers that can be employed by the user (e.g. for storing handles)

    //----- Out -----
    VmbFrameStatus_t    receiveStatus;      // Resulting status of the receive operation
    VmbFrameFlags_t     receiveFlags;       // Flags indicating which additional frame information is available

    VmbUint32_t         imageSize;          // Size of the image data inside the data buffer
    VmbUint32_t         ancillarySize;      // Size of the ancillary data inside the data buffer

    VmbPixelFormat_t    pixelFormat;        // Pixel format of the image

    VmbUint32_t         width;              // Width of an image
    VmbUint32_t         height;             // Height of an image
    VmbUint32_t         offsetX;            // Horizontal offset of an image
    VmbUint32_t         offsetY;            // Vertical offset of an image

    VmbUint64_t         frameID;            // Unique ID of this frame in this stream
    VmbUint64_t         timestamp;          // Timestamp set by the camera
} VmbFrame_t;

The code that I added to the example:
err = VmbCaptureFrameWait( cameraHandle, &frame, nTimeout );
if ( VmbErrorSuccess == err )  //Existing SynchronousGrab code
    {

    CurSrc = (unsigned char*)frame.buffer;
    for (k = 0; k < frame.height; k++) {
        for (j = 0; j < frame.width; j++) {
            if (*(CurSrc+k * frame.width + j) >= threshold) {
                coordY = realloc(coordY, ++arraysize * sizeof(*coordY));
                coordX = realloc(coordX, arraysize * sizeof(*coordX));
                intensity = realloc(intensity, arraysize * sizeof(*intensity));
                coordY[arraysize - 1] = k * (*(CurSrc + k * frame.width + j));
                coordX[arraysize - 1] = j * (*(CurSrc + k * frame.width + j));
                intensity[arraysize - 1] = (*(CurSrc + k * frame.width + j));
            }
        }
    }
    if (arraysize != 0) {
        centroid_x = getSum(coordX, arraysize) / getSum(intensity, arraysize);
        centroid_y = getSum(coordY, arraysize) / getSum(intensity, arraysize);
        printf("Centroid is in (%.1f,%.1f)\n", centroid_x, centroid_y);
        free(coordX);
        free(coordY);
        free(intensity);
        arraysize = 0;
    }

    if ( VmbFrameStatusComplete == frame.receiveStatus )  //Existing SynchronousGrab code

And the getSum() function I created:
int getSum(float* head, int size) {                         //CUSTOM FUNCTION
    int i;
    int sum = 0;
    for (i = 0; i < size; i++) {
        sum = sum + head[i];
    }
    return sum;
}

In theory, this would work. Since I had already tried the centroid algorithm with an image (with a fixed 1440:1080 size) that I loaded through <stdlib.h> to a c application that only did that.
Now, when adapting that algorithm to a bigger size image, through frame.width and frame.height, and cycling through frame.buffer (that I'm not sure exactly what it holds), the centroid coordinates are no longer correct. Not only they are not correct, they actually oscilate a bit (might be due to vibrations of the physical camera/table/etc).
I had an error at the beginning, because I thought the image was the same size as the ones I was trying before, so, in the coordX and coordY assigns I was using 1440 instead of frame.width. Well, the first time I ran the program after editing that, the centroidY value kept being negative (which is quite odd since what I'm assigning to coordY is a product of 2 positive values), but the 3 times I ran after that, it started being positive. Although, with an error of 1900 pixels or something (centroidX has an error of the same magnitude). Dunno if this bit information helps or further confuses the reader.
I'm guessing that frame.buffer doesn't point to what I think it was pointing to, i.e., a memory array of the grayscale of every pixel with length = frame.width * frame.height. But I'm not sure, and don't know how to get out of this.
Also note that I have limited access to the place where the camera setup is, so brute-force solutions of excessive memory lookups aren't that feasible. But, if it's the only way to go, I'll manage.
EDIT: after posting, I just noticed that the function below my code is waiting for the completion of the function above my code. I might have messed up that. I should've placed the centroid algorithm below both functions. I just placed the algorithm after the last use of frame as a whole. But now I'm guessing that this isn't working because I'm looking at a non-complete image in the memory.

A: As @ryyker kindly pointed, the getSum function and sum variable inside it should be float. That, and maybe the re-positioning of the centroid algorithm (after the status change), solved my problem. It is now working as intended.

redpajama_set_name: RedPajamaStackExchange


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Q: ShareKit opens Official Facebook App on iPad when sharing? Just when I thought I had sorted it another problem occurs! So I finally got ShareKit to share an image on Facebook (clicking on Share Facebook button, which then opens mobile Safari to authenticate, then goes back to app and saves image to Facebook....cool)but after much research I'm sure I read somewhere that if you had the official Facebook app on your device, mobile Safari would't need to launch to authenticate. So I decided to download the Official Facebook app and give it a go.
Now when I tap on my Facebook share button, rather than Safari launching to authenticate, the official Facebook App launches, shows some blank pop up window saying 'Connecting' then goes back to my app and does absolutely nothing at all.
So in other words I can get it to work if I don't have the Official Facebook app installed on my device but it doesn't work if I do!!!
Does anyone know how to fix this problem?

A: First, In Xcode, you need to change your apps bundle ID from the default which includes $PRODUCT_NAME... to the actual name of your app so it looks like: com.domain.appname
Second, make sure the bundle ID for your app on FB matches your fully qualified bundle ID.
Third, make sure that SSO is enabled in your Facebook APP settings.


text:
package org.neo4j.cypher.internal.frontend.v2_3

import org.neo4j.cypher.internal.frontend.v2_3.parser.matchers._
import org.parboiled.scala._

package object parser {
  lazy val IdentifierStart: Rule0 = new IdentifierStartMatcher()
  lazy val IdentifierPart: Rule0 = new IdentifierPartMatcher()
  lazy val WSChar: Rule0 = new WhitespaceCharMatcher()
}

redpajama_set_name: RedPajamaGithub


Grayling's Emily Plotkin reports back from day two of CES.
Qualcomm and Ford join forces to create a new "language" for vehicles: Qualcomm and Ford made a joint announcement, stating that they will be working together on "Cellular Vehicle to Everything", a new way for vehicles to communicate with each other. They are attempting to create communication among vehicles with smart infrastructure, in order to increase road safety when self-driving vehicles are introduced on to the roads.
Sick of doing your laundry? Now you can buy a machine to clean and fold your laundry for you: The catch? This AI powered laundry machine is priced at a cool $16,000.
Watch TV without even lifting a finger: Dish announced today that it has been working on integrating Google Home and Google Assistant into its TV service, creating a TV that can be controlled with your voice.
A competitor for Uber and Lyft: Koolicar, a French startup launched in 2012 with a mission to organize peer-to-peer car rentals, announced that it has a new AR-driven app coming, called Koolicar GO. This app allows users instantly to find cars within their vicinity that are available.
A phone that can calculate calories within food: Samsung announced its new artificial intelligence assistant, Bixby, that will supposedly be able to identify calories in different foods, though it is still in initial stages. It does so using AR, with the prototype identifying several meals and then displaying the number of calories contained within them for the user.
Can these earphones replace your personal trainer?: Soul Electronics has shown its new in-ear headphones at CES with gait analysis, built mainly for runners. The company states that the earphones will give you feedback on your form, and how to improve it.
The next generation of Refrigerators: LG announced its new fridge, which allows you to pretty much do everything on it—shop groceries, play music, look at your calendar, and more. With Amazon Alexa, the 29' HD transparent LCD touch screen on the fridge also allows you to see inside the fridge while it's closed.
Design your own speakers: BeoSound Shape is a wall-mounted wireless speaker system for people who love music—and people who love home décor. The speakers are customizable and produce amazing in-room acoustics.
Sony introduces a new kind of projector: Sony plans to transform the way you see and display entertainment, with anew 4K ultra short throw projector. The physical design is flawless-- an artificial marble top, aluminum frame and wooden shelf. And we forgot to mention the most astonishing part—it's 49-1/2" × 22-1/8" × 18-5/8".
Did you notice something missing at CES?: Amazon's Fire TV OS has been absent at CES. Many TVs on the CES floor have support from Amazon's Alexa, but none from Amazon's Fire.
Emily Plotkin is an account executive with Grayling Los Angeles.


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Another Tropical System Set to Impact Hawaii
9 Aug 2015, 9:32 am
Another tropical system could impact Hawaii by the end of the work week, fresh off the heels of Tropical Storm Guillermo's glancing blow last week.
Hurricane Hilda, which as of Sunday morning was still a major Category 3 storm on the Saffir-Simpson Scale with maximum sustained winds of 115 miles-per-hour (MPH), was still about 600 miles or so off of the coast of Hawaii's Big Island. Hilda is expected to turn towards the west-northwest in the general direction of America's 50th state, however, it is expected to continue to run into cooler waters and increased wind shear as it slowly approaches Hawaii.
Hilda's primary impact on Hawaii is expected to be large surf, and High Surf Advisories were posted by the National Weather Service's Honolulu office on Sunday morning for south- and east-facing shores of Maui and the Big Island.. Waves are expected to increase into Monday and Tuesday as Hilda slowly approaches from the southwest, with wave heights perhaps increasing to 15-20 feet in favored locations by Tuesday, particularly on the Big Island.
The main question, however, will be whether Hilda's wind and rains will reach Hawaii. Models are still differing on whether Hilda will be picked up by an area of high pressure east of Hawaii, which would push the storm further out to sea and likely entirely miss the state. The Central Pacific Hurricane Center, however, slightly adjusted its official forecast on Sunday (see map) to nudge the storm slightly closer to Hawaii by Thursday or Friday. Either way, Hilda is expected to be significantly weaker, perhaps just a remnant low, if it does impact Hawaii, and again surf is expected to be Hilda's main impact.
Last summer, Tropical Storm Iselle made a rare direct hit on Hawaii, resulting in nearly $80 million dollars' worth of damage and devastating the state's papaya crop. Despite its location in the center of the Pacific Ocean, tropical impacts are rare due to the relatively ocean waters surrounding the state. However, an active Pacific hurricane season, likely caused by warmer-than-average sea-surface temperatures due to a strong El Nino, have kept the tropics active so far this summer.
Stay with WeatherNation for the latest on the tropics.
Meteorologist Chris Bianchi

redpajama_set_name: RedPajamaCommonCrawl


text:
Quick links... National Politics Ohio Politics Local Politics Elections National Elections Local
LIST: The lame-duck Ohio bills that passed late last night and earlier this week ahead of the holiday recess
Ohio lawmakers were up late into the early hours Thursday morning, sending multiple pieces of legislation to Governor Mike DeWine's desk before the House and Senate go on holiday recess.
By: Ian Cross , Morgan Trau , News 5 Staff
Posted at 11:26 AM, Dec 15, 2022
COLUMBUS, Ohio — While several high-profile bills that would have altered the State Board of Education's role and banned trans athletes from participating in youth sports failed to pass Wednesday, Ohio lawmakers were up late into the early hours at the end of their lame-duck session Thursday morning, sending multiple pieces of legislation to Gov. Mike DeWine's desk before the House and Senate go on holiday recess.
Voter ID bill passes
A bill that was originally authored to get rid of certain election days and was expanded to require photo IDs for in-person voting and codifying a limit on ballot drop boxes passed the House and Senate this week and now heads to Gov. DeWine's desk.
"No longer will showing a random bank statement or utility bill be good enough to cast a ballot in our state," state Sen. Theresa Gavarone, R-Bowling Green, said on the Senate floor.
House Bill 458 would also require completed mail-in ballots to arrive within four days of Election Day, instead of 10. The absentee voting period is also shortened from three days before the election to a week before.
Curbside voting will also be removed as an option for voters, except those with a disability rendering them "physically unable to enter a polling place."
RELATED: Voter ID requirements inserted into special election bill, passed by Senate
Bill preventing city bans on tobacco products passes
Early Thursday morning, the Ohio House passed a tobacco bill that includes a measure that prevents cities from prohibiting the sale of flavored tobacco products, giving the state regulatory control.
State Rep. Jon Cross, R-Kenton, said the bill, HB 513, is needed to keep jurisdictions from picking "winners and losers in retail," the Akron Beacon Journal reports.
"We want to sit here and say you can't buy this and you can't buy that," Cross said.
The amendment to the state tobacco legislation reads: "The regulation of tobacco products and alternative nicotine products is a matter of general statewide concern that requires statewide regulation."
Sweeping criminal justice reform bill passes
A bill that combined several other bills covering everything from cellphone use while driving to sexual abuse education in schools was passed by lawmakers Thursday morning.
SB 288 included HB 105, known as Erin's Law, which will add age-appropriate sexual abuse and violence prevention education in schools, as well as staff training for the instruction of these courses.
News 5 coverage results in progress for child sex abuse prevention bill after 10 years stalled in OH Senate
"This version of it contains a parental opt-out, which some of the conservative groups thought was very important to include," Rep. Bill Seitz (R-Cincinnati) said. "So we are letting those parents that don't want their children to be educated about such things to opt out."
According to a news release from the Ohio Senate, the bill also includes key reforms to:
Increase credit eligibility from current 8% to 15% in reduction of prison term for active participation or completion of constructive programs, helping accelerate an eligible offenders success after release.
Modify the current "Good Samaritan" law by expanding immunity from prosecution for minor drug possession offenses.
Strengthen penalties for domestic violent offenders by increasing the penalties from strangulation or suffocation to a felony domestic violence conviction.
The strangulation bill and similar versions of it have languished in the legislature for years and have been the subject of multiple investigations by News 5 investigator Sarah Buduson.
Strangled: How Ohio fails to protect the public from the most dangerous criminals
'The time has come.' Supporters tell Ohio lawmakers why strangulation should be made a felony
'It's an embarrassment — Ohio AG hopes lawmakers pass bill making strangulation a felony
The distracted driving bill that passed the Ohio House overwhelmingly last month was also included in this senate bill. It would make using an electronic device while driving a primary offense, meaning law enforcement can stop and cite drivers solely for that offense.
RELATED: Ohio House passes enhanced distracted driving law; bill moves to state senate
Enhanced distracted driving law passes Ohio House
SB 288 passed overwhelmingly in the Senate on Nov. 30 and in the House Thursday morning, with just seven GOP members voting against it.
$6 billion in federal COVID relief doled out
The final vote of the night – or, more accurately, morning – was an approval of $6 billion in federal COVID-19 relief dollars.
The Akron Beacon Journal reports it included $1.75 billion for K-12 schools, $740 million for the state's rainy day fund, $498.5 million for child care, including $313 million directly for providers and $350 million for nursing homes to address the workforce shortage.
Each of these pieces of legislation now heads to DeWine's desk for signing.
Follow WEWS statehouse reporter Morgan Trau on Twitter and Facebook.


text:
Search in titles only Search in News_1 only
U.S. Securities and Exchange Commission Announces 2018 Government-Business Forum to Be Held at The Ohio State University
Washington, DC - - (October 18, 2018) - - The Securities and Exchange Commission today announced it is partnering with the National Center for the Middle Market at The Ohio State University Max M. Fisher College of Business to host the SEC's annual Government-Business Forum on Small Business Capital Formation on Dec. 12. This annual forum provides a platform to highlight additional measures to improve small business capital formation.
"We have made it a priority to reach out to small businesses across the country," said Chairman Jay Clayton. "Holding this event in Columbus, one of the top five best cities for entrepreneurs and startups, will give us the opportunity to hear directly from small businesses and their investors on ways to improve our regulatory system."
The morning session will feature a panel discussion exploring how capital formation options are working for small businesses, such as those in the Midwest. Participants will then work in groups to formulate specific policy recommendations. Information on the panel participants and the full agenda will be announced in the coming weeks and will be available on the forum webpage .
The forum will begin at 9 a.m. Eastern Time and will be open to the public. It will be held in the Fawcett Center on the campus of The Ohio State University in Columbus, Ohio. The opening remarks and panel discussion will be webcast live. The breakout group sessions will not be webcast but will be accessible by teleconference for those not attending in person. Anyone wishing to participate in a breakout group either in person or by teleconference must register online by Dec. 7.
Members of the public are invited to suggest recommendations or topics to be discussed at the forum by calling the SEC's Office of Small Business Policy at (202) 551-3460.
Information on ways small businesses can raise capital is available at https://www.sec.gov/smallbusiness .
Credit: U.S. Securities and Exchange Commission
Tags: 2018, announces, commission, exchange, forum, government-business, ohio, securities, state, university
Register for the SEC's 40th Annual Small Business Forum, Featuring Inclusive Conversations on Capital Formation from Startup to Small Cap
U.S. Securities and Exchange Commission Releases Report on 38th Annual Small Business Forum
U.S. Securities and Exchange Commission Announces Agenda and Panelists for 2019 Small Business Forum in Omaha
U.S. Securities and Exchange Commission and NYU to Host Sept. 21 Forum on High-Frequency Trading and Liquidity Resiliency
U.S. Securities and Exchange Commission to Host Crowdfunding Dialogue February 28 . 2017
Federal Trade Commission Announces Agenda for May Forum on Small Business Financing
Federal Trade Commission Announces Agenda for March 9 FinTech Forum on Artificial Intelligence and Blockchain Technology
SEC Announces Conference on Macroeconomic and Structural Trends and Dynamics Affecting the Capital Markets
Federal Deposit Insurance Corporation Hosts Use of Technology in the Business of Banking Forum in Virginia
U.S. Securities and Exchange Commission Staff to Host Nov. 15 Roundtable on the Proxy Process
U.S. Securities and Exchange Commission Launches New Strategic Hub for Innovation and Financial Technology
Federal Communications Commission Announces Forum on Geolocation for 988
U.S. Securities and Exchange Commission Proposes Rules to Include Certain Significant Market Participants as "Dealers" or "Government Securities Dealers"
U.S. Securities and Exchange Commission and North American Securities Administrators Association Sign Info-Sharing Agreement for Crowdfunding and Other Offerings
Federal Communications Commission Chairwoman Rosenworcel convenes Principals Meeting of Federal Interagency Cybersecurity Forum
U.S. Small Business Administration Launches - - - Getting Back on Track: Help Is Here - - - Webinar Series to Help America's Small Business Owners and Entrepreneurs
U.S. Securities and Exchange Commission Chairman Clayton Announces Event for Main Street Investors in Chicago


text:
‡‡Shipping fees apply. Shipping fees and delivery times vary depending on location, size and weight of the item(s) and is only available within the province of the Canadian Tire retail location ("Store") from which the item(s) was purchased. Bulk items will only be delivered within a 100km radius of the Store. Not available in Recontre East, NL. Conditions and restrictions apply. Visit https://www.canadiantire.ca/en/deliver-to-home.html for more information.
In the Duelist Kingdom tournament, Bonz, Sid and Zygor met Bandit Keith, who agreed to coach them through the tournament, so all four of them would advance to Pegasus Castle. Keith wanted revenge against Maximillion Pegasus for humiliating him in the final match of the Intercontinental Championship. While helping them win Duels the first day of the tournament, Keith secretly intends to use them for their Star Chips. When Keith finds out about Yugi Muto, Joey Wheeler, and the rest of the gang, he plans to get in their way and eliminate them.
Bonz, Sid, and Zygor are then seen right before the Battle City finals. The three reside in a nearby cemetery and trick people into giving up their Locator Cards. However, Yami Bakura is not intimidated by their act and challenges them to a Duel in which the winner gets all the Locator Cards, and thus goes directly to the Battle City Finals. Bakura wins in just a few moves, and then banishes them to Hell (the Shadow Realm in the dub).
Four groups of Zygons attempted to make Earth more like Zygor: those who arrived in the 12th century (TV: Terror of the Zygons), those that arrived in the 16th century and plotted to invade in the 21st century (TV: The Day of the Doctor), those that arrived in 1909 (PROSE: Sting of the Zygons), and those that arrived in the late-20th century. (HOMEVID: Zygon: When Being You Just Isn't Enough)


text:
Q: Running psycopg2 COPY_FROM for an empty table for multiple datasets in a loop will copy only the last entry I have multiple datasets with no conflicting primary keys or constraints, for which I need to run copy_from in a loop for every dataset to add them in the same table (the table is empty). Only the last dataset from the loop will be inserted.
This can be reproduced only if the table for witch is run is empty. If the table has even a single row, all the datasets will be inserted normally.
Note: For my use-case, I need to run multiple copy_from on the same table because I need to process the datasets independently on different subprocesses, running a single copy_from for all the merged datasets won't be a solution due to design considerations.
Postgres log is not showing anything. Also, the order of datasets in the loop does not matter. No matter the order, always only the last dataset in the loop will be inserted into the table.
for df, client_id in clients_data: #iteration trough a map of DataFrame objects and client ids
    with conn:
          with conn.cursor() as cursor:
              for chunk in df:
                  df = pipeline.clean_df(chunk, cursor, client_id) #doing some preprocessing irrelevant to the problem
                  copy_from_df(df, 'mytable', cursor, chunksize=50000)
      conn.close()

def copy_from_df(df: DataFrame,
                 table: str,
                 cursor,
                 chunk_size: int = __chunksize
                 ):
    try:
        for i in range(0, df.shape[0], chunk_size):
            buffer = StringIO()
            chunk = df.iloc[i:(i + chunk_size)]
            chunk.to_csv(buffer, index=False, header=False, sep='\t', na_rep='\\N', quoting=None)
            buffer.seek(0)
            cursor.execute(f'SET search_path TO {SCHEMA}')
            cursor.copy_from(buffer, table, columns=list(df.columns))
    except psycopg2.Error as e:
        logger.error('COPY FROM Error: ' + str(e))

*

*OS: MacOS 11.6 Running psycopg2 from Docker 3.6.0

*Psycopg2: 2.9.2

*Python version: 3.9

*PostgreSQL version: 14.0-1.pgdg110+1


text:
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how to calculate force
for the most common brands here. Remember to include all forces including reactions and normal loads such as point loads. What force does Mary exert on the box? Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. This website uses cookies to improve your experience. Let's take a look at an example: Mary is trying to lift a box from the floor to the shelf. Our site includes quite a bit of content, so if you're having an issue finding what you're looking for, go on ahead and use that search feature there! Force is a push or a pull exerted by an energy in motion. \bold {F_ {net}} = \bold {F_1 + F_2 + F_3 +...} F = m a. Newton's second law states that force is proportional to what is required for an object of constant mass to change its velocity. If mass and acceleration are both known, simply multiply them and you are set. And the whole of this science revolves around the concept of energy, motion and force. In physics, you can use the impulse-momentum theorem to calculate force based on impulse and momentum. G-force in car crashes. Pinterest. We just need to know the radius of the turns and the speed of the cars. But have you ever wondered the feeling you experience in those rides is caused by what? d: Distance between centers of the masses of objects, (G here is the constant of proportionality and has been calculated to be about 6.673 x 10, . The net force is the vector sum of all forces acting on a body. Newton described force as a vector quantity, since it had both direction and magnitude. How to Calculate Force from Impulse and Momentum. This is an unbalanced form of force that allows the object to move in a circular path towards the instantaneous center of curvature of the path traveled. Using the impact force calculator. Contents hide. Answer to all these questions and more are provided…. Why we don't float around in the air? Advertisement. In the example below, cutting force is already known to be 1800 lbs from previous calculations. When the apple fell to the ground from the tree, Newton analyzed that the force that had caused apple's fall had to be dependent on the mass of the apple. To simplify somewhat, determine the worst-case force situation intuitively, then treat the calculation as a two-dimensional static-mechanics problem (using a free-body diagram). The word 'average' is made use of to specify that this velocity is not an accurately measured or 'instantaneous' velocity. Before learning how to calculate centripetal force, let us see what is centripetal force and how it is derived. As per the second law of motion by Newton, formula for force is a product of mass of the body and the acceleration with which the mass is moving. Newton described force as a vector quantity, since it had both direction and magnitude. Force has magnitude and direction. 2 Using work-energy theorem. Aerodynamics helps in overcoming the mechanical resistance of air seen in moving objects. That means it is calculate at any moment of time, not of some change in time. Friction is a force that is always existent between two surfaces when the surfaces try to glide over each other. But what is the net force formula? Let's take a look at an example of how to use the force equation above. Calculating force can be as simple as using the formula above. In the formula: 1. The other fundamental forces of nature apart from the force of gravitation are electromagnetic force (force that causes repulsion, between electric charges), weak forces (the forces responsible for radioactive decay) and strong forces (which are the forces that hold the nuclei of atoms together). We also use third-party cookies that help us analyze and understand how you use this website. Formula to calculate gravitational force. For example, it can be used to calculate the impact force of a vehicle (car, truck, train), plane, football, of birds hitting a plane or wind mill, as well as for falling bodies that crash into the ground. This versatile impact force calculator is useful for estimating the impact forces involved in collisions of different kinds. Step 1. So let's understand on how to calculate force formula. Calculating a bolt's clamping force can be accomplished with knowledge of both of these variables. ), A 70 Kg student is traveling in a plane which is flying about 40000 feet above earth's surface. Physics is a science that exemplifies every daily movement and activity made by us. What is the reduction in push force, when the crate starts moving? Copyright © Science Struck & Buzzle.com, Inc. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. How to Calculate Force of a Linear Actuator Mounted Straight Up If you are pushing/pulling a load straight up, then the actuator you are looking to buy should be the same force rating as your required weight. This makes an SRB calculator impractical. The word "centripetal" itself originates from the Latin word – centrum (center) and petere (towards). To solve this problem, just multiply the mass (2 kg) by the accel… Because of the impulse-momentum theorem, we can make a direct connection between how a force acts on an object over time and the motion of the object. Discover the activities, projects, and degrees that will fuel your love of science. L: Perimeter after punching , mm. The symbol of Force is 'F' and its measured in the SI unit of Newton. Forces in balance are said to be in equilibrium: there is also no change in motion.. Free Body Diagrams. So what would be the gravitational force of attraction? Reddit. So read on! Email. The acceleration experienced by such an object is called the centripetal acceleration, and it always points towards the centre of the circular path. How is potential energy defined? Calculate with what force does the person needs to push, for the crate to start moving. This category only includes cookies that ensures basic functionalities and security features of the website. If you are looking for the velocity formula in physics, this article has the needful, dished out for you. The answer lies in one word: gravitational force. If we want to converted the result into metric tons, we can divide the result of KN by 9.8. Force Due to Gravity Formula Combining the formulae in the above two sections produces the relationship F=mg F = mg where g = 9.8 m/s 2 on Earth. In order to calculate the magnitude and direction of a resultant force or to calculate the value of one force component or another, we can use the law of sines and the law of cosines. Have you ever sat on rides that contain swings? Can we find velocity using force formula. The units for acceleration are meters per second squared ( m/s2), and the units for mass are kilograms (kg). How to calculate impact force? Prev Article . This engineering statics tutorial introduces how to calculate normal force on a slope. The answer is, the force required to accelerate an object 1 m/s^2 that has a mass of 10kg is 10 Newtons. 6789 Quail Hill Pkwy, Suite 211 Irvine CA 92603. (Don't confuse it with mass! SRB calculations are based on variables that are updated once a quarter. Would you like to write for us? As per the second law of motion by Newton, formula for force is a product of mass of the body and the acceleration with which the mass is moving. These cookies do not store any personal information. 2.1 Also, read. By Steven Holzner . The formula for force states that force is equal to mass multiplied by acceleration. Resultant Force = Sum of all forces For example, if there's a force of 10 Newtons acting in the positive x direction and a force of 5 newtons acting in the -x direction, the results for is 10 + (-5) = 5 newtons in the positive x direction. For example, you can relate the impulse with which you hit an object to its consequent change in momentum. Force can be calculated with the formula Work = F × D × Cosine (θ), where F = force (in newtons), D = displacement (in meters), and θ = the angle between the force vector and the direction of motion. What holds us to the ground? Opposing the Opposition. mass of the object and g is the acceleration of the object due to gravity Therefore, the gravitational force between the two satellites is 4.002 x 10^-11. If you're interest in more science calculators, visit our science and engineering section. So what is force, basically? 1 g = 9.80665 m/s² = 32.17405 ft/s². So, if you know mass and acceleration, just multiply them together and now you know the force! This website uses cookies to improve your experience while you navigate through the website. Solution: 40000 feet ~ 6.39 x 106 meters.G = 6.673 x 10-11 Newton meter2/Kg2So Fgav = G x (m1x m2)/d2 = 6.673 x 10-11 x (5.98 x 1024 x 70) / (6.39 x 106)2= 684 N. So the amount of gravitational force between the earth and the passenger is 684 Newtons (N). where: acceleration formula is the change in velocity (v) over a period of time (t). But, the object will always retain the same mass. So, Known Quantities: - Force and distance Unknown Quantities:-Velocity. Calculating formula for force becomes much easier if you are through with Newton's laws of motion. In the bridge example the free body diagram for the top of the tower is: In simple terms, it makes an object to move from its rest position. Sign up to receive the latest and greatest articles from our site automatically each week (give or take)...right to your inbox. Necessary cookies are absolutely essential for the website to function properly. what physical quantities we need to calculate; In our problem, we have to calculate the velocity of an object from force and distance. Action At A Distance forces do not require contact and are exerted over a distance. This force always opposes the motion of one surface over the other and that is the reason why things don't keep slipping and falling off the surfaces that contain them.
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It´s an academic paper (research), so it must be structured like that and please keep in mind that this essay is about classical ERP-systems. so it´s not about current ERPs which are up to date.
points through literature reasearch should be topics like ecommerce, data feeds in the online landscape, online retailers, etc.


text:
in: Cryptids, Africa, Aquatic-based Cryptid,
Oceanic Cryptids
Giant cryptid
Ocean carcasses
Globsters
Misidentified
Trunko
Trunko is the nickname for an animal reportedly sighted in Margate, South Africa, on October 25, 1924, according to an article entitled "Fish Like A Polar Bear" published in the December 27, 1924, edition of London's Daily Mail. The animal was reputedly first seen off the coast battling two killer whales, which fought the unusual creature for three hours. It used its tail to attack the whales and reportedly lifted itself out of the water by about 20 feet. The creature reputedly washed up on Margate Beach but despite being there for 10 days, no scientist ever investigated the carcass while it was beached,
Trunko carcass washed in shore
so no reliable description has been published, and until September 2010 it was assumed that no photographs of it had ever been published. Some people who have never been identified were reported to have described the animal as possessing snowy-white fur, an elephantine trunk, a lobster-like tail, and a carcass devoid of blood. While it was beached, the animal was measured by beach-goers and turned out to be 47 ft (14 m) in length, 10 ft (3 m) wide, and 5 ft (1.5 m) high, with the trunk's length being 5 ft (1.5 m), the trunk's diameter 14 in (36 cm), the tail 10 ft (3 m), and the fur being 8 in (20 cm) long.
Elephant-like sea monster from 1610
The trunk was said to be attached directly to the animal's torso, as no head was visible on the carcass. For this feature, the animal was dubbed "Trunko" by British cryptozoologist Karl Shuker in his 1996 book The Unexplained. In the March 27, 1925, edition of the Charleroi Mail, in Charleroi, Pennsylvania, an article entitled "Whales Slain by Hairy Monster" reported that whales there were killed by a strange creature which was washed up on a beach exhausted and fell unconscious, but made its way back into the ocean and swam away after 10 days, never to be seen again.
Gajah Mina, elephantine sea creature reported from Indonesia and Malaysian waters
Art of Trunko washed up
Underwater trunko
Description of Trunko
Art of Trunko washed up black and white.


text:
using content::BrowserThread;

namespace drive {
namespace {

// Gets a ResourceEntry from the metadata, and overwrites its file info when the
// cached file is dirty.
FileError GetLocallyStoredResourceEntry(
    internal::ResourceMetadata* resource_metadata,
    internal::FileCache* cache,
    const base::FilePath& file_path,
    ResourceEntry* entry) {
  std::string local_id;
  FileError error = resource_metadata->GetIdByPath(file_path, &local_id);
  if (error != FILE_ERROR_OK)
    return error;

  error = resource_metadata->GetResourceEntryById(local_id, entry);
  if (error != FILE_ERROR_OK)
    return error;

  // For entries that will never be cached, use the original resource entry
  // as is.
  if (!entry->has_file_specific_info() ||
      entry->file_specific_info().is_hosted_document())
    return FILE_ERROR_OK;

  // When no dirty cache is found, use the original resource entry as is.
  FileCacheEntry cache_entry;
  if (!cache->GetCacheEntry(local_id, &cache_entry) || !cache_entry.is_dirty())
    return FILE_ERROR_OK;

  // If the cache is dirty, obtain the file info from the cache file itself.
  base::FilePath local_cache_path;
  error = cache->GetFile(local_id, &local_cache_path);
  if (error != FILE_ERROR_OK)
    return error;

  base::PlatformFileInfo file_info;
  if (!file_util::GetFileInfo(local_cache_path, &file_info))
    return FILE_ERROR_NOT_FOUND;

  SetPlatformFileInfoToResourceEntry(file_info, entry);
  return FILE_ERROR_OK;
}

// Runs the callback with parameters.
void RunGetResourceEntryCallback(const GetResourceEntryCallback& callback,
                                 scoped_ptr<ResourceEntry> entry,
                                 FileError error) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  if (error != FILE_ERROR_OK)
    entry.reset();
  callback.Run(error, entry.Pass());
}

// Used to implement Pin().
FileError PinInternal(internal::ResourceMetadata* resource_metadata,
                      internal::FileCache* cache,
                      const base::FilePath& file_path,
                      std::string* local_id) {
  FileError error = resource_metadata->GetIdByPath(file_path, local_id);
  if (error != FILE_ERROR_OK)
    return error;

  ResourceEntry entry;
  error = resource_metadata->GetResourceEntryById(*local_id, &entry);
  if (error != FILE_ERROR_OK)
    return error;

  // TODO(hashimoto): Support pinning directories. crbug.com/127831
  if (entry.file_info().is_directory())
    return FILE_ERROR_NOT_A_FILE;

  return cache->Pin(*local_id);
}

// Used to implement Unpin().
FileError UnpinInternal(internal::ResourceMetadata* resource_metadata,
                        internal::FileCache* cache,
                        const base::FilePath& file_path,
                        std::string* local_id) {
  FileError error = resource_metadata->GetIdByPath(file_path, local_id);
  if (error != FILE_ERROR_OK)
    return error;

  return cache->Unpin(*local_id);
}

// Used to implement MarkCacheFileAsMounted().
FileError MarkCacheFileAsMountedInternal(
    internal::ResourceMetadata* resource_metadata,
    internal::FileCache* cache,
    const base::FilePath& drive_file_path,
    base::FilePath* cache_file_path) {
  std::string local_id;
  FileError error = resource_metadata->GetIdByPath(drive_file_path, &local_id);
  if (error != FILE_ERROR_OK)
    return error;

  return cache->MarkAsMounted(local_id, cache_file_path);
}

// Runs the callback with arguments.
void RunMarkMountedCallback(const MarkMountedCallback& callback,
                            base::FilePath* cache_file_path,
                            FileError error) {
  DCHECK(!callback.is_null());
  callback.Run(error, *cache_file_path);
}

// Used to implement GetCacheEntry.
bool GetCacheEntryInternal(internal::ResourceMetadata* resource_metadata,
                                 internal::FileCache* cache,
                                 const base::FilePath& drive_file_path,
                                 FileCacheEntry* cache_entry) {
  std::string id;
  if (resource_metadata->GetIdByPath(drive_file_path, &id) != FILE_ERROR_OK)
    return false;

  return cache->GetCacheEntry(id, cache_entry);
}

// Runs the callback with arguments.
void RunGetCacheEntryCallback(const GetCacheEntryCallback& callback,
                              const FileCacheEntry* cache_entry,
                              bool success) {
  DCHECK(!callback.is_null());
  callback.Run(success, *cache_entry);
}

// Callback for ResourceMetadata::GetLargestChangestamp.
// |callback| must not be null.
void OnGetLargestChangestamp(
    FileSystemMetadata metadata,  // Will be modified.
    const GetFilesystemMetadataCallback& callback,
    int64 largest_changestamp) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  metadata.largest_changestamp = largest_changestamp;
  callback.Run(metadata);
}

// Thin adapter to map GetFileCallback to FileOperationCallback.
void GetFileCallbackToFileOperationCallbackAdapter(
    const FileOperationCallback& callback,
    FileError error,
    const base::FilePath& unused_file_path,
    scoped_ptr<ResourceEntry> unused_entry) {
  callback.Run(error);
}

// Clears |resource_metadata| and |cache|.
FileError ResetOnBlockingPool(internal::ResourceMetadata* resource_metadata,
                              internal::FileCache* cache) {
  FileError error = resource_metadata->Reset();
  if (error != FILE_ERROR_OK)
    return error;
 return cache->ClearAll() ? FILE_ERROR_OK : FILE_ERROR_FAILED;
}

}  // namespace

FileSystem::FileSystem(
    PrefService* pref_service,
    internal::FileCache* cache,
    DriveServiceInterface* drive_service,
    JobScheduler* scheduler,
    internal::ResourceMetadata* resource_metadata,
    base::SequencedTaskRunner* blocking_task_runner,
    const base::FilePath& temporary_file_directory)
    : pref_service_(pref_service),
      cache_(cache),
      drive_service_(drive_service),
      scheduler_(scheduler),
      resource_metadata_(resource_metadata),
      last_update_check_error_(FILE_ERROR_OK),
      blocking_task_runner_(blocking_task_runner),
      temporary_file_directory_(temporary_file_directory),
      weak_ptr_factory_(this) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

  ResetComponents();
}

FileSystem::~FileSystem() {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

  change_list_loader_->RemoveObserver(this);
}

void FileSystem::Reload(const FileOperationCallback& callback) {
  // Discard the current loader and operation objects and renew them. This is to
  // avoid that changes initiated before the metadata reset is applied after the
  // reset, which may cause an inconsistent state.
  // TODO(kinaba): callbacks held in the subcomponents are discarded. We might
  // want to have a way to abort and flush callbacks in in-flight operations.
  ResetComponents();

  base::PostTaskAndReplyWithResult(
      blocking_task_runner_,
      FROM_HERE,
      base::Bind(&ResetOnBlockingPool, resource_metadata_, cache_),
      base::Bind(&FileSystem::ReloadAfterReset,
                 weak_ptr_factory_.GetWeakPtr(),
                 callback));
}

void FileSystem::ReloadAfterReset(const FileOperationCallback& callback,
                                  FileError error) {
  if (error != FILE_ERROR_OK) {
    LOG(ERROR) << "Failed to reload Drive file system: "
               << FileErrorToString(error);
    callback.Run(error);
    return;
  }

  change_list_loader_->LoadIfNeeded(
      internal::DirectoryFetchInfo(),
      base::Bind(&FileSystem::OnUpdateChecked, weak_ptr_factory_.GetWeakPtr()));
  callback.Run(error);
}

void FileSystem::ResetComponents() {
  file_system::OperationObserver* observer = this;
  copy_operation_.reset(
      new file_system::CopyOperation(blocking_task_runner_.get(),
                                     observer,
                                     scheduler_,
                                     resource_metadata_,
                                     cache_,
                                     drive_service_,
                                     temporary_file_directory_));
  create_directory_operation_.reset(new file_system::CreateDirectoryOperation(
      blocking_task_runner_.get(), observer, scheduler_, resource_metadata_));
  create_file_operation_.reset(
      new file_system::CreateFileOperation(blocking_task_runner_.get(),
                                           observer,
                                           scheduler_,
                                           resource_metadata_,
                                           cache_));
  move_operation_.reset(
      new file_system::MoveOperation(blocking_task_runner_.get(),
                                     observer,
                                     scheduler_,
                                     resource_metadata_));
  open_file_operation_.reset(
      new file_system::OpenFileOperation(blocking_task_runner_.get(),
                                         observer,
                                         scheduler_,
                                         resource_metadata_,
                                         cache_,
                                         temporary_file_directory_));
  remove_operation_.reset(
      new file_system::RemoveOperation(blocking_task_runner_.get(),
                                       observer,
                                       scheduler_,
                                       resource_metadata_,
                                       cache_));
  touch_operation_.reset(new file_system::TouchOperation(
      blocking_task_runner_.get(), observer, scheduler_, resource_metadata_));
  truncate_operation_.reset(
      new file_system::TruncateOperation(blocking_task_runner_.get(),
                                         observer,
                                         scheduler_,
                                         resource_metadata_,
                                         cache_,
                                         temporary_file_directory_));
  download_operation_.reset(
      new file_system::DownloadOperation(blocking_task_runner_.get(),
                                         observer,
                                         scheduler_,
                                         resource_metadata_,
                                         cache_,
                                         temporary_file_directory_));
  update_operation_.reset(
      new file_system::UpdateOperation(blocking_task_runner_.get(),
                                       observer,
                                       scheduler_,
                                       resource_metadata_,
                                       cache_));
  search_operation_.reset(new file_system::SearchOperation(
      blocking_task_runner_.get(), scheduler_, resource_metadata_));
  get_file_for_saving_operation_.reset(
      new file_system::GetFileForSavingOperation(blocking_task_runner_.get(),
                                                 observer,
                                                 scheduler_,
                                                 resource_metadata_,
                                                 cache_,
                                                 temporary_file_directory_));

  sync_client_.reset(new internal::SyncClient(blocking_task_runner_.get(),
                                              observer,
                                              scheduler_,
                                              resource_metadata_,
                                              cache_,
                                              temporary_file_directory_));

  change_list_loader_.reset(new internal::ChangeListLoader(
      blocking_task_runner_.get(),
      resource_metadata_,
      scheduler_,
      drive_service_));
  change_list_loader_->AddObserver(this);
}

void FileSystem::CheckForUpdates() {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DVLOG(1) << "CheckForUpdates";

  change_list_loader_->CheckForUpdates(
      base::Bind(&FileSystem::OnUpdateChecked, weak_ptr_factory_.GetWeakPtr()));
}

void FileSystem::OnUpdateChecked(FileError error) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DVLOG(1) << "CheckForUpdates finished: " << FileErrorToString(error);
  last_update_check_time_ = base::Time::Now();
  last_update_check_error_ = error;
}

void FileSystem::AddObserver(FileSystemObserver* observer) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  observers_.AddObserver(observer);
}

void FileSystem::RemoveObserver(FileSystemObserver* observer) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  observers_.RemoveObserver(observer);
}

void FileSystem::TransferFileFromLocalToRemote(
    const base::FilePath& local_src_file_path,
    const base::FilePath& remote_dest_file_path,
    const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());
  copy_operation_->TransferFileFromLocalToRemote(local_src_file_path,
                                                 remote_dest_file_path,
                                                 callback);
}

void FileSystem::Copy(const base::FilePath& src_file_path,
                      const base::FilePath& dest_file_path,
                      bool preserve_last_modified,
                      const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());
  copy_operation_->Copy(
      src_file_path, dest_file_path, preserve_last_modified, callback);
}

void FileSystem::Move(const base::FilePath& src_file_path,
                      const base::FilePath& dest_file_path,
                      bool preserve_last_modified,
                      const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());
  move_operation_->Move(
      src_file_path, dest_file_path, preserve_last_modified, callback);
}

void FileSystem::Remove(const base::FilePath& file_path,
                        bool is_recursive,
                        const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());
  remove_operation_->Remove(file_path, is_recursive, callback);
}

void FileSystem::CreateDirectory(
    const base::FilePath& directory_path,
    bool is_exclusive,
    bool is_recursive,
    const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  // Ensure its parent directory is loaded to the local metadata.
  LoadDirectoryIfNeeded(
      directory_path.DirName(),
      base::Bind(&FileSystem::CreateDirectoryAfterLoad,
                 weak_ptr_factory_.GetWeakPtr(),
                 directory_path, is_exclusive, is_recursive, callback));
}

void FileSystem::CreateDirectoryAfterLoad(
    const base::FilePath& directory_path,
    bool is_exclusive,
    bool is_recursive,
    const FileOperationCallback& callback,
    FileError load_error) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  if (load_error != FILE_ERROR_OK) {
    callback.Run(load_error);
    return;
  }

  create_directory_operation_->CreateDirectory(
      directory_path, is_exclusive, is_recursive, callback);
}

void FileSystem::CreateFile(const base::FilePath& file_path,
                            bool is_exclusive,
                            const std::string& mime_type,
                            const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());
  create_file_operation_->CreateFile(
      file_path, is_exclusive, mime_type, callback);
}

void FileSystem::TouchFile(const base::FilePath& file_path,
                           const base::Time& last_access_time,
                           const base::Time& last_modified_time,
                           const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!last_access_time.is_null());
  DCHECK(!last_modified_time.is_null());
  DCHECK(!callback.is_null());
  touch_operation_->TouchFile(
      file_path, last_access_time, last_modified_time, callback);
}

void FileSystem::TruncateFile(const base::FilePath& file_path,
                              int64 length,
                              const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());
  truncate_operation_->Truncate(file_path, length, callback);
}

void FileSystem::Pin(const base::FilePath& file_path,
                     const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  std::string* local_id = new std::string;
  base::PostTaskAndReplyWithResult(
      blocking_task_runner_,
      FROM_HERE,
      base::Bind(&PinInternal, resource_metadata_, cache_, file_path, local_id),
      base::Bind(&FileSystem::FinishPin,
                 weak_ptr_factory_.GetWeakPtr(),
                 callback,
                 base::Owned(local_id)));
}

void FileSystem::FinishPin(const FileOperationCallback& callback,
                           const std::string* local_id,
                           FileError error) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  if (error == FILE_ERROR_OK)
    sync_client_->AddFetchTask(*local_id);
  callback.Run(error);
}

void FileSystem::Unpin(const base::FilePath& file_path,
                       const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  std::string* local_id = new std::string;
  base::PostTaskAndReplyWithResult(
      blocking_task_runner_,
      FROM_HERE,
      base::Bind(&UnpinInternal,
                 resource_metadata_,
                 cache_,
                 file_path,
                 local_id),
      base::Bind(&FileSystem::FinishUnpin,
                 weak_ptr_factory_.GetWeakPtr(),
                 callback,
                 base::Owned(local_id)));
}

void FileSystem::FinishUnpin(const FileOperationCallback& callback,
                             const std::string* local_id,
                             FileError error) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  if (error == FILE_ERROR_OK)
    sync_client_->RemoveFetchTask(*local_id);
  callback.Run(error);
}

void FileSystem::GetFile(const base::FilePath& file_path,
                         const GetFileCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  download_operation_->EnsureFileDownloadedByPath(
      file_path,
      ClientContext(USER_INITIATED),
      GetFileContentInitializedCallback(),
      google_apis::GetContentCallback(),
      callback);
}

void FileSystem::GetFileForSaving(const base::FilePath& file_path,
                                  const GetFileCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  get_file_for_saving_operation_->GetFileForSaving(file_path, callback);
}

void FileSystem::GetFileContent(
    const base::FilePath& file_path,
    const GetFileContentInitializedCallback& initialized_callback,
    const google_apis::GetContentCallback& get_content_callback,
    const FileOperationCallback& completion_callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!initialized_callback.is_null());
  DCHECK(!get_content_callback.is_null());
  DCHECK(!completion_callback.is_null());

  download_operation_->EnsureFileDownloadedByPath(
      file_path,
      ClientContext(USER_INITIATED),
      initialized_callback,
      get_content_callback,
      base::Bind(&GetFileCallbackToFileOperationCallbackAdapter,
                 completion_callback));
}

void FileSystem::GetResourceEntry(
    const base::FilePath& file_path,
    const GetResourceEntryCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  scoped_ptr<ResourceEntry> entry(new ResourceEntry);
  ResourceEntry* entry_ptr = entry.get();
  base::PostTaskAndReplyWithResult(
      blocking_task_runner_,
      FROM_HERE,
      base::Bind(&GetLocallyStoredResourceEntry,
                 resource_metadata_,
                 cache_,
                 file_path,
                 entry_ptr),
      base::Bind(&FileSystem::GetResourceEntryAfterGetEntry,
                 weak_ptr_factory_.GetWeakPtr(),
                 file_path,
                 callback,
                 base::Passed(&entry)));
}

void FileSystem::GetResourceEntryAfterGetEntry(
    const base::FilePath& file_path,
    const GetResourceEntryCallback& callback,
    scoped_ptr<ResourceEntry> entry,
    FileError error) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  if (error == FILE_ERROR_NOT_FOUND) {
    // If the information about the path is not in the local ResourceMetadata,
    // try fetching information of the directory and retry.
    //
    // Note: this forms mutual recursion between GetResourceEntry and
    // LoadDirectoryIfNeeded, because directory loading requires the existence
    // of directory entry itself. The recursion terminates because we always go
    // up the hierarchy by .DirName() bounded under the Drive root path.
    if (util::GetDriveGrandRootPath().IsParent(file_path)) {
      LoadDirectoryIfNeeded(
          file_path.DirName(),
          base::Bind(&FileSystem::GetResourceEntryAfterLoad,
                     weak_ptr_factory_.GetWeakPtr(),
                     file_path,
                     callback));
      return;
    }
  }

  callback.Run(error, entry.Pass());
}

void FileSystem::GetResourceEntryAfterLoad(
    const base::FilePath& file_path,
    const GetResourceEntryCallback& callback,
    FileError error) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  if (error != FILE_ERROR_OK) {
    callback.Run(error, scoped_ptr<ResourceEntry>());
    return;
  }

  scoped_ptr<ResourceEntry> entry(new ResourceEntry);
  ResourceEntry* entry_ptr = entry.get();
  base::PostTaskAndReplyWithResult(
      blocking_task_runner_,
      FROM_HERE,
      base::Bind(&GetLocallyStoredResourceEntry,
                 resource_metadata_,
                 cache_,
                 file_path,
                 entry_ptr),
      base::Bind(&RunGetResourceEntryCallback,
                 callback,
                 base::Passed(&entry)));
}

void FileSystem::ReadDirectory(
    const base::FilePath& directory_path,
    const ReadDirectoryCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  LoadDirectoryIfNeeded(
      directory_path,
      base::Bind(&FileSystem::ReadDirectoryAfterLoad,
                 weak_ptr_factory_.GetWeakPtr(),
                 directory_path,
                 callback));
}

void FileSystem::LoadDirectoryIfNeeded(const base::FilePath& directory_path,
                                       const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  GetResourceEntry(
      directory_path,
      base::Bind(&FileSystem::LoadDirectoryIfNeededAfterGetEntry,
                 weak_ptr_factory_.GetWeakPtr(),
                 directory_path,
                 callback));
}

void FileSystem::LoadDirectoryIfNeededAfterGetEntry(
    const base::FilePath& directory_path,
    const FileOperationCallback& callback,
    FileError error,
    scoped_ptr<ResourceEntry> entry) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  if (error != FILE_ERROR_OK) {
    callback.Run(error);
    return;
  }

  if (!entry->file_info().is_directory()) {
    callback.Run(FILE_ERROR_NOT_A_DIRECTORY);
    return;
  }

  // Pass the directory fetch info so we can fetch the contents of the
  // directory before loading change lists.
  internal::DirectoryFetchInfo directory_fetch_info(
      entry->resource_id(),
      entry->directory_specific_info().changestamp());
  change_list_loader_->LoadIfNeeded(directory_fetch_info, callback);
}

void FileSystem::ReadDirectoryAfterLoad(
    const base::FilePath& directory_path,
    const ReadDirectoryCallback& callback,
    FileError error) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  DLOG_IF(INFO, error != FILE_ERROR_OK) << "LoadIfNeeded failed. "
                                        << FileErrorToString(error);

  resource_metadata_->ReadDirectoryByPathOnUIThread(
      directory_path,
      base::Bind(&FileSystem::ReadDirectoryAfterRead,
                 weak_ptr_factory_.GetWeakPtr(),
                 directory_path,
                 callback));
}

void FileSystem::ReadDirectoryAfterRead(
    const base::FilePath& directory_path,
    const ReadDirectoryCallback& callback,
    FileError error,
    scoped_ptr<ResourceEntryVector> entries) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  if (error != FILE_ERROR_OK) {
    callback.Run(error,
                 scoped_ptr<ResourceEntryVector>());
    return;
  }
  DCHECK(entries.get());  // This is valid for empty directories too.

  // TODO(satorux): Stop handling hide_hosted_docs here. crbug.com/256520.
  const bool hide_hosted_docs =
      pref_service_->GetBoolean(prefs::kDisableDriveHostedFiles);
  scoped_ptr<ResourceEntryVector> filtered(new ResourceEntryVector);
  for (size_t i = 0; i < entries->size(); ++i) {
    if (hide_hosted_docs &&
        entries->at(i).file_specific_info().is_hosted_document()) {
      continue;
    }
    filtered->push_back(entries->at(i));
  }

  callback.Run(FILE_ERROR_OK, filtered.Pass());
}

void FileSystem::GetAvailableSpace(
    const GetAvailableSpaceCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  scheduler_->GetAboutResource(
      base::Bind(&FileSystem::OnGetAboutResource,
                 weak_ptr_factory_.GetWeakPtr(),
                 callback));
}

void FileSystem::OnGetAboutResource(
    const GetAvailableSpaceCallback& callback,
    google_apis::GDataErrorCode status,
    scoped_ptr<google_apis::AboutResource> about_resource) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  FileError error = GDataToFileError(status);
  if (error != FILE_ERROR_OK) {
    callback.Run(error, -1, -1);
    return;
  }
  DCHECK(about_resource);

  callback.Run(FILE_ERROR_OK,
               about_resource->quota_bytes_total(),
               about_resource->quota_bytes_used());
}

void FileSystem::GetShareUrl(
    const base::FilePath& file_path,
    const GURL& embed_origin,
    const GetShareUrlCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  // Resolve the resource id.
  resource_metadata_->GetResourceEntryByPathOnUIThread(
      file_path,
      base::Bind(&FileSystem::GetShareUrlAfterGetResourceEntry,
                 weak_ptr_factory_.GetWeakPtr(),
                 file_path,
                 embed_origin,
                 callback));
}

void FileSystem::GetShareUrlAfterGetResourceEntry(
    const base::FilePath& file_path,
    const GURL& embed_origin,
    const GetShareUrlCallback& callback,
    FileError error,
    scoped_ptr<ResourceEntry> entry) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  if (error != FILE_ERROR_OK) {
    callback.Run(error, GURL());
    return;
  }
  if (util::IsSpecialResourceId(entry->resource_id())) {
    // Do not load special directories. Just return.
    callback.Run(FILE_ERROR_FAILED, GURL());
    return;
  }

  scheduler_->GetShareUrl(
      entry->resource_id(),
      embed_origin,
      ClientContext(USER_INITIATED),
      base::Bind(&FileSystem::OnGetResourceEntryForGetShareUrl,
                 weak_ptr_factory_.GetWeakPtr(),
                 callback));
}

void FileSystem::OnGetResourceEntryForGetShareUrl(
    const GetShareUrlCallback& callback,
    google_apis::GDataErrorCode status,
    const GURL& share_url) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  FileError error = GDataToFileError(status);
  if (error != FILE_ERROR_OK) {
    callback.Run(error, GURL());
    return;
  }

  if (share_url.is_empty()) {
    callback.Run(FILE_ERROR_FAILED, GURL());
    return;
  }

  callback.Run(FILE_ERROR_OK, share_url);
}

void FileSystem::Search(const std::string& search_query,
                        const GURL& next_link,
                        const SearchCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());
  search_operation_->Search(search_query, next_link, callback);
}

void FileSystem::SearchMetadata(const std::string& query,
                                int options,
                                int at_most_num_matches,
                                const SearchMetadataCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

  // TODO(satorux): Stop handling hide_hosted_docs here. crbug.com/256520.
  if (pref_service_->GetBoolean(prefs::kDisableDriveHostedFiles))
    options |= SEARCH_METADATA_EXCLUDE_HOSTED_DOCUMENTS;

  drive::internal::SearchMetadata(blocking_task_runner_,
                                  resource_metadata_,
                                  query,
                                  options,
                                  at_most_num_matches,
                                  callback);
}

void FileSystem::OnDirectoryChangedByOperation(
    const base::FilePath& directory_path) {
  OnDirectoryChanged(directory_path);
}

void FileSystem::OnCacheFileUploadNeededByOperation(
    const std::string& local_id) {
  sync_client_->AddUploadTask(local_id);
}

void FileSystem::OnDirectoryChanged(const base::FilePath& directory_path) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

  FOR_EACH_OBSERVER(FileSystemObserver, observers_,
                    OnDirectoryChanged(directory_path));
}

void FileSystem::OnLoadFromServerComplete() {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

  sync_client_->StartCheckingExistingPinnedFiles();
}

void FileSystem::OnInitialLoadComplete() {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

  blocking_task_runner_->PostTask(FROM_HERE,
                                  base::Bind(&internal::RemoveStaleCacheFiles,
                                             cache_,
                                             resource_metadata_));
  sync_client_->StartProcessingBacklog();
}

void FileSystem::GetMetadata(
    const GetFilesystemMetadataCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  FileSystemMetadata metadata;
  metadata.refreshing = change_list_loader_->IsRefreshing();

  // Metadata related to delta update.
  metadata.last_update_check_time = last_update_check_time_;
  metadata.last_update_check_error = last_update_check_error_;

  base::PostTaskAndReplyWithResult(
      blocking_task_runner_,
      FROM_HERE,
      base::Bind(&internal::ResourceMetadata::GetLargestChangestamp,
                 base::Unretained(resource_metadata_)),
      base::Bind(&OnGetLargestChangestamp, metadata, callback));
}

void FileSystem::MarkCacheFileAsMounted(
    const base::FilePath& drive_file_path,
    const MarkMountedCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  base::FilePath* cache_file_path = new base::FilePath;
  base::PostTaskAndReplyWithResult(
      blocking_task_runner_,
      FROM_HERE,
      base::Bind(&MarkCacheFileAsMountedInternal,
                 resource_metadata_,
                 cache_,
                 drive_file_path,
                 cache_file_path),
      base::Bind(&RunMarkMountedCallback,
                 callback,
                 base::Owned(cache_file_path)));
}

void FileSystem::MarkCacheFileAsUnmounted(
    const base::FilePath& cache_file_path,
    const FileOperationCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  if (!cache_->IsUnderFileCacheDirectory(cache_file_path)) {
    callback.Run(FILE_ERROR_FAILED);
    return;
  }
  cache_->MarkAsUnmountedOnUIThread(cache_file_path, callback);
}

void FileSystem::GetCacheEntry(
    const base::FilePath& drive_file_path,
    const GetCacheEntryCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  FileCacheEntry* cache_entry = new FileCacheEntry;
  base::PostTaskAndReplyWithResult(
      blocking_task_runner_,
      FROM_HERE,
      base::Bind(&GetCacheEntryInternal,
                 resource_metadata_,
                 cache_,
                 drive_file_path,
                 cache_entry),
      base::Bind(&RunGetCacheEntryCallback,
                 callback,
                 base::Owned(cache_entry)));
}

void FileSystem::OpenFile(const base::FilePath& file_path,
                          OpenMode open_mode,
                          const std::string& mime_type,
                          const OpenFileCallback& callback) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  DCHECK(!callback.is_null());

  open_file_operation_->OpenFile(file_path, open_mode, mime_type, callback);
}

}  // namespace drive