Kolkata Knight Riders have been the most clinical team in IPL 2017. Their pacers have delivered when the spinners had an off day and the spinners stepped up when the pacers lost momentum on that rare occasion.But the KKR template was set by their skipper Gautam Gambhir, who became the first batsman to breach the 300-run mark this IPL. He was in business again on Friday, when he smashed his 35th fifty as KKR cruised in their chase of 161 against the Delhi Daredevils in the league.Gambhir, in the course of his victory, also crossed the 6000-run mark in T20 cricket. The stylish southpaw turned around KKR’s fortunes after joining the franchise in 2011. They went on to win the IPL twice under his leadership in 2012 and 2014.Gambhir took 141 matches to get to the 4000-run mark. Sidelined from the Indian limited-overs teams for the last four years, he has been in stunning form in the IPL.In 2013, Gambhir scored 406 runs and then followed that up with 335 in 2014 before a modest return of 327 in 2015.Last year, Gambhir smashed 501 but his efforts were damp squib on the back of outstanding performances by Kohli’s 973 and David Warner’s 848.The 35-year-old Gambhir already has the most half-centuries in the IPL and also holds the record for most fifties by an IPL captain.Gambhir is an IPL legend now – a successful captain, a heavy run-scorer and as he recently showed, a Good Samaritan.Recently, following the attack by the Maoists in Chhattisgarh’s Sukma district in which 25 CRPF jawans lost their lives, Gambhir asked for action and response in retaliation to the loss of lives.advertisementHe even pledged to bear the educational expenses of the children of the paramilitary personnel, who were killed in the attack.(With inputs from ANI)
Nick Kyrgios scripted his third major victory of the week on Friday when he defeated John Isner 7-5 5-7 7-6(7) to set up a showdown against Alexander Zverev in the final of the Acapulco International in Mexico.The 23-year-old Australian followed victories over multiple Grand Slam winners Stanislas Wawrinka and Rafael Nadal with a hard-fought win over Isner, the American who sits 63 places above him in the world rankings.Break points and chances were few and far between in sultry conditions on Mexico’s Pacific coast with each player struggling to find that little bit extra.Isner won more points on serve and return overall but the temperamental Aussie came through when it mattered, particularly in the third set tiebreak, which he finished with a masterful drop shot from the base line.He will next meet world number three Zverev, who beat Briton Cameron Norrie 7-6(0) 6-3 in the earlier semi-final.Zverev, who has won nine ATP titles in the last two years, was just too good for the 23-year old Briton and at one stage won 24 of the 30 points on offer.The German, 21, has not lost a set all week in an impressive charge towards the final, his first of 2019.”It was very tough. It was pretty windy out here, not easy conditions, and his game actually I think fits the wind quite well, so it was not easy,” Zverev said.”I’m just happy to be through. At this stage, you’ve got to win matches, no matter how. I’m just happy to be in the final.”advertisementKyrgios and Zverev have shared the spoils of their previous six meetings with three victories each, however, Zverev won their previous two matches last year.Also Watch:
Now playing: Watch this: 5 Photos Comments Emails between police and Ring showed tactics the Amazon-owned video doorbell company used to convince officers to join its program. Chris Monroe/CNET Up to 250 police departments have joined Amazon’s Ring Neighbors program, a neighborhood watch app, but these deals don’t happen overnight. For the Chula Vista police department in California, Ring spent more than a year offering discounts and applying peer pressure with constant reminders and emails to convince officers to sign up. The Chula Vista police department signed up for Ring’s Neighbors program in May, but the courtship started in March 2018, according to documents obtained by CNET through a Freedom of Information Act request. The video doorbell company pitched the program to the police department two months before it was publicly announced.These documents detail how Ring’s staff convinced a local police department in California to join Neighbors, an app released by the company in May 2018. When police didn’t respond, Ring would follow up by noting neighboring law enforcement agencies that have joined, pushing for the Chula Vista police to join them.The tactics also offer a window into how Ring, which retail giant Amazon purchased last year for $839 million, has struck partnerships with police departments across the country. Police consider it a tool for obtaining video in investigations, as well as creating surveillance networks in residential neighborhoods. But these relationships are cause for alarm among privacy advocates, who raise concerns that a tech giant like Amazon is helping police create surveillance networks. “A long term goal for CVPD is to have a real-time crime center which will be doing a myriad of things. One of those things would be leveraging civilian surveillance cameras in the city to aid us in solving crime and learning about crime patterns,” CVPD’s community policing Sgt. Frank Giaime said in an email to Ring. “As the crime analysis unit’s capacity increases, I would like to integrate a program like this to help us build a partnership with the community through technology.”Ring didn’t respond to a request for comment.”No, the Chula Vista Police Department did not feel pressured in any way to partner with Ring’s Neighbors app,” the CVPD’s investigations division Capt. Phil Collum said in an email. For the CVPD, the courtship began with a cold pitch. Discounts ringingThe first email from Ring’s outreach coordinator to the Chula Vista police department came in March 2018.The message opened with an introduction and a comment on an increase in crime in the area.”I recently came across this News clip of an uptick in home break-ins in Chula Vista,” the coordinator wrote. “As an extension of Ring’s Neighborhoods initiative, I’m reaching out to share an offer to all public safety agencies that actively participate in either crime prevention or community policing.” He offered to donate a free video doorbell, as well as discounts of up to $50 for more cameras. The email also referenced a Ring pilot program that claimed it reduced crime rates. MIT Technology Review scrutinized that study last October and found that the evidence was flimsy. The Chula Vista police didn’t respond for 10 days, and the outreach coordinator followed up, this time with a flier on different Ring products and a $50 promo code for every officer in the department on video doorbells.CPVD responded and said it would follow up, giving Ring a foot in the door. There’s no email communication between the two until about three months later, in May 2018. The same coordinator said Raymond Pollum, Ring’s head of law enforcement partnerships, would be in the San Diego area demonstrating tools for other police departments.Pollum met with the CVPD department on May 3, 2018, and provided a demonstration of Neighbors and the police dashboard. He followed up with an email four days later and attached a memorandum of understanding “for consideration,” even though CVPD hadn’t agreed to join the program yet.Chula Vista’s police department promoting a Ring giveaway for National Night Out in August. Instagram The police department responded a month later, telling Pollum it sent the proposed contract to higher-ups in June. When he didn’t get a response for another month, Pollum followed up a month later, sending police a link to a crime solved in Tampa, Florida, through Ring’s cameras. CVPD didn’t respond to that message.At the same time, the department was coordinating National Night Out, an annual police-community event for promoting neighborhood safety. Ring was a sponsor for it, and its coordinator promoted contests and giveaways for free video doorbells and discounts at CVPD’s event.”We appreciate the goodies you’re sending and are most interested in having someone man a booth,” Angela Gaines, CVPD’s police community relations officer, told Ring in an email.Ring had brought 20 video doorbell kits for the police community event that August.PressuringThe peer pressure campaign started in January 2019, after surrounding police departments partnered with Ring. Pollum had given the department another demo, and sent the CVPD the memorandum of understanding again on Feb. 1. Giaime told Ring that the department was “eager” to sign the contract but needed to send it off to the chain of command for approval. He told Pollum it would take a few weeks to get a formal presentation together. Four days after Ring’s demonstration, Pollum followed up with another email. “We executed the La Mesa PD MOU yesterday, so they will join Carlsbad PD and Oceanside PD as San Diego LE portal participants,” Pollum wrote. “Not sure if peer pressure is a good thing or not, but wanted to at least make you aware that they are joining the program and will be onboarded shortly.”About three weeks later, on Feb. 21, Pollum followed up and told the sergeant that the La Mesa police department joined Ring, and the San Diego sheriff’s department approved the MOU. Again, Giaime told Pollum he would need a few weeks to put together the presentation and get approval from the command staff. Ring followed up in a month and a half, listing even more police departments that are signing up with the company. “As Chula Vista Police Department considers the benefits of gaining access to the Neighbors Portal, I thought it might be helpful to know of other agencies in the area that have joined,” Pollum wrote on April 2. He listed the San Diego County sheriff’s department, along with police in Oceanside, Carlsbad and La Mesa, and noted that officers in Escondido and National City were considering the program. Six days after that, Ring sent another email to CVPD with the same message. “SD Sheriff’s joined a couple of weeks ago so I’m hoping to get the other major cities in San Diego onboard quickly. Can you give me a quick update on where things stand?” Pollum wrote. Giaime responded with an apology, noting that the police “had a lot of things going on” during that time. He made the presentation to higher-ups on April 26, and four days later, the Chula Vista Police Department signed Ring’s contract, which went into effect on May 1. The department officially announced it joined three months later, on its Instagram page.After a year of emails, discounts and peer pressure from Ring’s executives, CVPD became one of hundreds of police departments to join Ring. Share your voice Ring’s smart doorbell keeps a close eye on your house 4:14 68 Ring convinced police to join its network through peer… Tags Security Cameras Security Ring Amazon
More information: Tamar Goldzak et al. “Light stops at exceptional points.” Physical Review Letters. DOI: 10.1103/PhysRevLett.120.013901, Also at arXiv:1709.10172 [physics.optics] Light, which travels at a speed of 300,000 km/sec in a vacuum, can be slowed down and even stopped completely by methods that involve trapping the light inside crystals or ultracold clouds of atoms. Now in a new study, researchers have theoretically demonstrated a new way to bring light to a standstill: they show that light stops at “exceptional points,” which are points at which two light modes come together and coalesce, in waveguides that have a certain kind of symmetry. ‘Exceptional points’ give rise to counterintuitive physical effects Explore further Unlike most other methods that are used to stop light, the new method can be tuned to work with a wide range of frequencies and bandwidths, which may offer an important advantage for future slow-light applications.The researchers, Tamar Goldzak and Nimrod Moiseyev at the Technion – Israel Institute of Technology, along with Alexei A. Mailybaev at the Instituto de Matemática Pura e Aplicada (IMPA) in Rio de Janeiro, have published a paper on stopping light at exceptional points in a recent issue of Physical Review Letters.As the researchers explain, exceptional points can be created in waveguides in a straightforward way, by varying the gain/loss parameters so that two light modes coalesce (combine into one mode). Although light stops at these exceptional points, in most systems much of the light is lost at these points. The researchers showed that this problem can be fixed by using waveguides with parity-time (PT) symmetry, since this symmetry ensures that the gain and loss are always balanced. As a result, the light intensity remains constant when the light approaches the exceptional point, eliminating losses.To release the stopped light and accelerate it back up to normal speed, the scientists showed that the gain/loss parameters can simply be reversed. The most important feature of the new method, however, is that the exceptional points can be adjusted to work with any frequency of light, again simply by tuning the gain/loss parameters. The researchers also expect that this method can be used for other types of waves besides light, such as acoustic waves. They plan to further investigate these possibilities in the future. Citation: Speed of light drops to zero at ‘exceptional points’ (2018, January 31) retrieved 18 August 2019 from https://phys.org/news/2018-01-exceptional.html © 2018 Phys.org Journal information: Physical Review Letters Artistic image. Credit: pixabay 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.