New Algorithm Ranks Sports Teams like Googles PageRank

first_img Explore further Who’s in first? Physicists develop new football ranking system © 2009 PhysOrg.com More information: http://www.thepowerrank.com/ “A few years ago, I got interested in the technology behind Google’s search engine,” Feng told PhysOrg.com. “After looking into the PageRank algorithm, I realized it had the same origin in random processes that I use in my research every day… I thought suitable modifications of the algorithm should apply to ranking sports teams.”As Feng explains, the Power Rank algorithm requires only two parameters: the game score and the home field advantage (in the NFL, the home field advantage is considered to be three points). “There is no human bias, no memory of last season, and no style points,” he said. The idea is that this neutral ranking method can provide more accurate results than other methods, such as the simple win-loss record. For example, the Power Rank method ranks New England in third place in the NFL (behind New Orleans and Indianapolis); while these top two teams both have 12-0 records, New England’s record is 7-5. In contrast, Jacksonville, which also has a 7-5 record, is ranked 20th of 32 teams.To determine these rankings, the Power Rank algorithm is based on the concept of a network, where the nodes are the teams and the links between nodes are defined by games played between those teams. When two teams play each other, a number is assigned to the link (arrow) between those teams, based on the score and location of the game. The number is an estimate of the probability that the team at the head of the arrow beats the team at the tail on a future neutral site. A larger margin of victory implies a higher number on the edge from loser to winner. (There are two arrows between each pair of teams, with the arrows pointing in opposite directions, and the numbers on each arrow add up to 1.00, or 100%).Then, based on all the games in the league, each team receives a value. The teams are ranked in order by their values, similar to how Google’s PageRank algorithm ranks webpages. For example, in PageRank, a website becomes highly ranked when other highly ranked websites link to it; similarly, teams earn their rank by beating other highly ranked teams. The average value of the league is zero, so that teams with a positive (negative) value are slightly better (worse) than the average team.On the Power Rank website, Feng gives some examples to demonstrate how the algorithm works. In the NFL, suppose that San Francisco beats Chicago 55-21, Chicago beats New York 23-20, and New York beats San Francisco 35-32, with each team winning at home. If an algorithm only considered wins and losses, the three teams would be ranked equally since they each have one win.However, the score of each game gives additional information, which the Power Rank algorithm uses. The results of the algorithm are shown in the figure above. With this basic information, the Power Rank algorithm has attempted to sort out the contradiction that San Francisco beat Chicago but also lost to New York, who Chicago beat. Of course, the team’s values are based on only two games, so the values are probably not very accurate until more games are played.On the Power Rank website, Feng currently has a list of all 120 NCAA college football teams, as well as a list of all 32 NFL teams ranked by the algorithm. So far, he has not compared the algorithm’s predictions to individual game results, but he plans to do so soon. In addition, Feng plans to apply the algorithm to international soccer before next year’s World Cup. Although it may be tempting to use the Power Rank algorithm to predict individual games, Feng explains that the purpose of the algorithm is primarily to rank teams, not for guessing the future.”It is impossible to predict the outcome of a single game,” Feng said. “There are so many arbitrary factors to take into consideration, such as injuries. The Power Rank is truly about ranking teams based on how they have performed in the past. The ability to predict future outcomes based only on past scores serves to validate the rankings.” This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. (PhysOrg.com) — Sports fans may be interested in a new system that ranks NFL and college football teams in a simple, straightforward way, similar to how Google PageRank ranks webpages. The new sports algorithm, called the Power Rank, is being developed by Ed Feng, a researcher in statistical mechanics at Sandia National Laboratory, although this project is independent of his work at Sandia. An example of the Power Rank algorithm: if San Francisco beats Chicago 55-21, Chicago beats New York 23-20, and New York beats San Francisco 35-32, the resulting network is shown on the left, and the teams’ values on the right. Credit: Ed Feng. Citation: New Algorithm Ranks Sports Teams like Google’s PageRank (2009, December 15) retrieved 18 August 2019 from https://phys.org/news/2009-12-algorithm-sports-teams-google-pagerank.htmllast_img read more

EBay to power new data center with fuel cells

first_imgBloom’s Energy Server (Phys.org) — Proving that it’s serious about becoming greener, EBay has announced that a new data center being built in Utah will run entirely on fuel cells, a move that other giants in the technology sector have been hesitant to take. Currently, those companies using fuel cells to power their data centers use them as a supplemental source of power, clearly worried about relying on a still new and in some ways unproven technology. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Explore further The new data center is to be built in South Jordan, Utah as an addition to an already existing data center. The existing center will continue to draw power from the grid, while the new one will be powered exclusively by fuel cells, but will be hooked to the grid as a backup measure. EBay also has another data center in South Jordan that processes PayPal transactions, though there are no plans currently in place to make any modifications to its power source structure. As fuel cell technology has matured, it’s undergone a name change; it used to be called hydrogen fuel cell technology, but because other sources of fuel can now be uses as well, the name has become more generic. Still, the fuel cells for the South Jordan center will be of the hydrogen variety, though EBay has said that it will pay a premium for the creation of an equal amount of biogas in other places to offset the hydrogen used to power its plant. In addition to helping to save the environment, the center is expected to save on electricity costs as the price of hydrogen has dropped dramatically over the past several years.With fuel cells, the gas is not burned to produce heat to boil water to turn turbines to create electricity, as occurs with other processes. Instead, a chemical reaction occurs at high temperatures and the electricity produced is used to continuously recharge large batteries, which in turn are used to power the plant; this means carbon dioxide and water and very little else is released into the environment, making the process much cleaner than with fossil fuel burning plants. And because the electricity is made onsite, none is lost in transit and the need for bulky and expensive backup generators is eliminated.To generate the huge amount of power required by the data center, Bloom Energy, maker of the cells will string together enough of them to generate the six million watts the company believes it will need. Each fuel cell is capable of producing about 1.75 million kilowatt hours a year. Construction of the new plant is expected to commence almost immediately with completion likely by the middle of next year.center_img © 2012 Phys.Org Citation: EBay to power new data center with fuel cells (2012, June 26) retrieved 18 August 2019 from https://phys.org/news/2012-06-ebay-power-center-fuel-cells.html Apple plans nation’s biggest private fuel cell energy project in NClast_img read more

Study finds political ideology impacts decisionmaking regarding energyefficient products

first_img More information: Political ideology affects energy-efficiency attitudes and choices, PNAS, Published online before print April 29, 2013, doi: 10.1073/pnas.1218453110 AbstractThis research demonstrates how promoting the environment can negatively affect adoption of energy efficiency in the United States because of the political polarization surrounding environmental issues. Study 1 demonstrated that more politically conservative individuals were less in favor of investment in energy-efficient technology than were those who were more politically liberal. This finding was driven primarily by the lessened psychological value that more conservative individuals placed on reducing carbon emissions. Study 2 showed that this difference has consequences: In a real-choice context, more conservative individuals were less likely to purchase a more expensive energy-efficient light bulb when it was labeled with an environmental message than when it was unlabeled. These results highlight the importance of taking into account psychological value-based considerations in the individual adoption of energy-efficient technology in the United States and beyond.Press release Name-brand or generic? Your political ideology might influence your choice Explore further Citation: Study finds political ideology impacts decision-making regarding energy-efficient products (2013, April 30) retrieved 18 August 2019 from https://phys.org/news/2013-04-political-ideology-impacts-decision-making-energy-efficient.html © 2013 Phys.org Journal information: Proceedings of the National Academy of Sciences In the first study, 657 people (divided roughly in half by gender) were asked to fill out a questionnaire that was designed to reveal the person’s political leanings as well as their energy-saving product purchasing habits. In analyzing the answers given by the participants, the researchers found a trend that suggested that the more conservative a person’s political views, the less favorably they saw products advertised as environmentally friendly. Those with such leanings tended to claim they were more likely to buy such products, however, if they were instead advertised as money saving investments. Conversely, those with more liberal leanings tended to be more receptive towards buying products solely because they believed they would help solve environmental problems.In the second study, 210 volunteers were interviewed and then given $2 each to purchase a light bulb. The light bulbs offered for sale were either “normal” or an energy efficient variety (with a higher price.) The higher priced bulbs were identical but were advertised in two different ways: one made claims about how the light bulb was good for the planet, the other claimed to save the buyer money by using less electricity. The researchers found those with more conservative views were less inclined to buy the special bulbs when the labeling touted its planet-saving features. When it was labeled as a money-saver however, conservatives were quite willing to buy them. Those with a more liberal view were found willing to buy the special bulb regardless of which advertising was used. In another variant of the study, the researchers found that both conservatives and liberals bought the special bulb over the “normal” bulb if they were priced the same.The researchers suggest that those people in the study with conservative ideology were not necessarily against buying so-called green products, but have been conditioned to associate such terms with liberalism, and thus, shy away from products labeled as such. Because of this, the researchers suggest those that market such products look towards creating new phrases that aren’t tied to one group or another when making their pitches. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. (Phys.org) —Two researchers from the Wharton School, University of Pennsylvania and another from Duke University in North Carolina together have found that a person’s political ideology might impact his or her decision-making when purchasing products described as good for the environment, versus, money saving. In their paper published in Proceedings of the National Academy of Sciences, the team describes two field studies they conducted to better understand the issues involved and the results they found.last_img read more

Physicists propose identification of a gravitational arrow of time

first_img © 2014 Phys.org Citation: Physicists propose identification of a gravitational arrow of time (2014, November 3) retrieved 18 August 2019 from https://phys.org/news/2014-11-physicists-identification-gravitational-arrow.html Configuration of masses evolving under Newtonian gravity. Barbour et al. show that nearly all such systems have a moment of “lowest complexity,” which they identify as a unique “past” from which two “futures” emerge. Journal information: Physical Review Letters Data from ‘old’ experiment appears to constrain the idea of dark photons as part of dark matter theory More information: Identification of a Gravitational Arrow of Time, Phys. Rev. Lett. 113, 181101 – Published 29 October 2014 https://sp2.img.hsyaolu.com.cn/wp-shlf1314/2020/IMG10444.jpg” alt=”last_img” /> read more

When actions are louder than words

first_imgThe ongoing Bharat Rang Mahotsav is spreading it colours with mesmerising plays staged everyday. On Wednesday, a non-verbal play titled Life-In-Progress was staged, the play had no defined linear narrative but a series of images that look at our lives, our surrounding world and our inner spaces.Old newspapers and trash, a rag-picker, creepy crawlies, creatures from nightmares, dreamscapes, nebulous faces, dismembered hands, plastic bottles, curious people, devouring mouths, grabbing hands, running, masking, unmasking and more trash make haunting images that hold your imagination for a few moments and then disappear into the trash. The 50-minute play was staged by Delhi based group Katkatha Puppet Arts Trust. Also Read – ‘Playing Jojo was emotionally exhausting’The play titled, Sindu Kirilli had two interwoven stories. In the first, a young girl decides to leave her elderly grandfather behind on their farm in the valley so that she can escape to the city and pursue her dreams of becoming a famous singer. In the second story, an ageing playwright prepares to leave behind the ‘artificial’ world of theatre and urban life and move back to his origins in the farmland. His days of planning and dreaming about the ‘glorious future’ are nearing an end just as the young girl’s are beginning. Also Read – Leslie doing new comedy special with NetflixThe significance of the plot lies in the themes it presents before the audience and the secrets it reveals about the characters. Sindu Kirilli is essentially a tale of hope being passed down from one generation to the next. A group from Sri Lanka, Red Wings Theatre Group presented it in Sinhala language.Another non-verbal play Maya II was presented by Sharma Arts and Craft House (SACH), Manipur. The theme was Maya, the veil of deception, which blinds the eyes of mortals, and makes them behold a world which they cannot say either that it is or that it is not –  for it is like a dream, it is like the sunshine on the sand which the traveller takes from afar for water. The process of perpetuating the population through sexual union between the male and the female is natural. But aspiring for something that is far away is like the desire of the moth for the star; this is also human nature and a cause behind the teeming populace. These are just some of the ideas that Maya II attempts to explore. The play Nihsanga Samrat (The Lonely Monarch) is based on a novel by Sunil Gangopadhyay.Presented in Bengali by group Paikpara Indraranga from Kolkata the play is a saga of the life and times of Bengali Theatre thespian, Shishir Kumar Bhaduri who has almost become a legend for the current generation. The play presents a collage of various aspects of his life, on and off the stage, with many of his plays being revisited in the context of his personal life. It is an effort to look at the legend as a human being, unveiling all mythical anecdotes – a man who could disregard an award like the Padma Bhushan with ease, who lived with the aim of fulfilling his lifelong dream to create the Institution of National Theatre, who could rebuff the conventional route to success in his quest for a unique format of Indian theatre which would be independent of the British dramatic parameters that were then prevalent – a man who faced every challenge and accolade in life with equal stoicism.Japanese non-verbal play titled, Utsushi was created at the special request of international festivals willing to present Sankai Juku. Composed of excerpts from the repertory pieces, it has been newly reworked and re-staged in order to become a piece that contains the quintessence of the art of the choreographer Ushio Amagatsu.When: Till 15 Januarylast_img read more

CM to keep watchful eye on price of essential goods

first_imgKolkata: Chief Minister Mamata Banerjee will hold a meeting of the task force to ensure that prices of essential commodities do not go up in the state.The meeting is scheduled to be held on June 6 at Nabanna, the state Secretariat and all the concerned ministers and officials have been asked to be present.It may be mentioned that the Chief Minister has already expressed her concern apprehending a hike in prices of essential goods after the arbitrary increase in the fuel prices. She had earlier tweeted: “We are very concerned about the rising prices of petrol and diesel. This will certainly affect prices all around. Common people, farmers and many will suffer.” Also Read – Heavy rain hits traffic, flightsThe Chief Minister had also attacked the Centre for its “indifferent” attitude towards the issue and urged all anti-BJP political parties to go for a statewide agitation. There were also protest rallies across the state against the abnormal hike in prices of petrol and diesel.The state government had always taken steps to check the rampant increase in the prices of essential goods in the past and there is also a task force that maintains a strict vigil to oversee that the commoners are not harassed. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedNow, the state government is going to hold the meeting in which all the aspects in this connection will be discussed in detail.A few days ago there was a hike in potato prices. It was sold at around Rs 20 per kg at various markets in the city. The state Agriculture Marketing department took necessary and immediate measures after identifying that the price of the potato had shot up just for a particular section of middlemen.With the increase in the prices of petrol and diesel, the cost of transportation of goods has also gone up. It is leaving an effect on prices of vegetables, rice and other essential commodities.In such a situation, the state government is chalking out a plan to take necessary steps to give respite to the common people as much as possible. There would also be discussions in the meeting to ensure that prices of essential goods do not go up ahead of the forthcoming festivals in the state.last_img read more