Follow the news on India March 3, 2021 Find out more “Kicked my back” Police personnel stand guard in India gate to prevent a demonstration linked to the gang-raped and murder of a 19-year-old woman victim, in New Delhi on September 30, 2020. At least six policemen assaulted journalist Ahan Penkar because he was covering a demonstration related to another case of a raped and murdered teenager (photo: Sajjad Hussain / AFP). Help by sharing this information After seizing his ID cards, press card and phone, the police went to great lengths to delete all the photos and videos he had shot of the protest. Penkar was finally released at around 7 pm. and went to a hospital to be examined. Reporters Without Borders (RSF) is appalled to learn that New Delhi police arrested and beat a reporter covering a protest about the death of a teenage girl, and deleted his photos and videos. Appropriate sanctions are needed so that this kind of behaviour stops, RSF said. June 10, 2021 Find out more News Penkar arrived at the Model Town police station at around 2:45 pm to cover a demonstration outside by a small crowd protesting the refusal of the police to register a complaint about a 17-year-old girl from the Dalit caste (formerly known as Untouchables) who was allegedly raped and murdered by her higher-caste employer. IndiaAsia – Pacific Condemning abusesProtecting journalists Violence News RSF demands release of detained Indian journalist Siddique Kappan, hospitalised with Covid-19 “The targeted mistreatment of this journalist is all the more unacceptable because this is not the first time that the police in the Indian capital have violently targeted journalists. Such conduct is incompatible with the rule of law and Indian democracy, and must cease at once.” “This behaviour by New Delhi police, who deliberately disregarded Ahan Penkar’s status as a journalist, is absolutely intolerable,” said Daniel Bastard, the head of RSF’s Asia-Pacific desk. “The police involved in beating him must be punished. Mob attack Last August, New Delhi police displayed culpable passivity when three other journalists from The Caravan – Shahid Tantray, Prabhjit Singh and a woman who prefers not to be named – were subjected to an hour and a half of violence by a large crowd of supporters of the Bharatiya Janata Party (BJP), India’s ruling Hindu nationalist party. The police deleted the reporters’ photos and videos on this occasion as well. IndiaAsia – Pacific Condemning abusesProtecting journalists Violence India is ranked 142nd out of 180 countries in RSF’s 2020 World Press Freedom Index. Penkar was interviewing members of the girl’s family when policemen began arresting demonstrators, and Model Town assistant commissioner of police Ajay Kumar ordered them to arrest Penkar as well. After being taken into the station, Penkar was beaten by Kumar and five of his men despite constantly repeating that he was there to cover the event as a reporter. RSF_en Kumar slapped him in the face and repeatedly kicked him when he was on the ground. “I fell completely to the ground, and then he tried to pin me down, and kicked my back and shoulders,” Penkar said in a report published by The Caravan. April 27, 2021 Find out more Organisation In rural India, journalists face choice between covering pandemic and survival During a wave of intercommunal violence last February, RSF called on the New Delhi police to protect journalists and thereby allow them to cover events instead of allowing BJP supporters to target them. According to RSF’s tally, at least 18 journalists were harassed and attacked while police failed to intervene. News India: RSF denounces “systemic repression” of Manipur’s media Ahan Penkar, a reporter for The Caravan magazine, was treated this way by police in the north Delhi suburb of Model Town on the afternoon of 16 October despite repeatedly identifying himself as a journalist and showing them his press card. News Receive email alerts October 20, 2020 India: Magazine reporter beaten by police inside Delhi police station to go further
Demonstrating the technique in the cleanroom at the Center for Nanoscale Systems, a National Science Foundation–supported research facility at Harvard, Kats uses a machine called an electron beam evaporator to apply the gold and germanium coating. He seals the paper sample inside the machine’s chamber, and a pump sucks out the air until the pressure drops to a staggering 10-6 Torr (a billionth of an atmosphere). A stream of electrons strikes a piece of gold held in a carbon crucible, and the metal vaporizes, traveling upward through the vacuum until it hits the paper. Repeating the process, Kats adds the second layer. A little more or a little less germanium makes the difference between indigo and crimson.This particular lab technique, Kats pointed out, is unidirectional, so to the naked eye subtle differences in the color are visible at different angles, where slightly less of the metal has landed on the sides of the paper’s ridges and valleys. “You can imagine decorative applications where you might want something that has a little bit of this pearlescent look, where you look from different angles and see a different shade,” he said. “But if we were to go next door and use a reactive sputterer instead of this e-beam evaporator, we could easily get a coating that conforms to the surface, and you wouldn’t see any differences.”Many different pairings of metal are possible, too. “Germanium’s cheap. Gold is more expensive, of course, but in practice we’re not using much of it,” Kats explained. Capasso’s team has also demonstrated the technique using aluminum.“This is a way of coloring something with a very thin layer of material. So in principle, if it’s a metal to begin with, you can just use 10 nanometers to color it. And if it’s not, you can deposit a metal that’s 30 nm thick and then another 10 nm. That’s a lot thinner than a conventional paint coating that might be between a micron and 10 microns thick.”In those occasional situations where the weight of the paint matters, this could be significant. Capasso remembers, for example, that the external fuel tank of NASA’s space shuttle used to be painted white. After the first two missions, engineers stopped painting it and saved 600 pounds of weight.Because the metal coatings absorb a lot of light, reflecting only a narrow set of wavelengths, Capasso suggests that they could also be incorporated into optoelectronic devices such as photodetectors and solar cells.“The fact that these can be deposited on flexible substrates has implications for flexible and maybe even stretchable optoelectronics that could be part of your clothing or could be rolled up or folded,” Capasso said.Harvard’s Office of Technology Development continues to pursue commercial opportunities for the new color-coating technology and welcomes contact from interested parties.Kats, who just concluded his yearlong postdoctoral research position at SEAS, will become an assistant professor at the University of Wisconsin, Madison, in January. He credits those many hours spent in Harvard’s laboratory facilities for much of his success in applied physics.“You learn so much while you’re doing it,” he said. “You can be creative, discover something along the way, apply something new to your research. It’s marvelous that we have students and postdocs down here making things.”The Capasso group was supported in this research by the Air Force Office of Scientific Research and Draper Laboratory. The Center for Nanoscale Systems is a member of the National Nanotechnology Infrastructure Network, supported by the National Science Foundation. Mikhail_14_570 Kats removes the stencil to reveal the gold-coated paper. The purple areas are where germanium has been deposited on top of gold. “Because neither the gold nor the germanium by itself is that color,” he says, “it has to be interference.” The paper is still very lightweight and flexible. Delicate process In a sub-basement deep below the Laboratory for Integrated Science and Engineering at Harvard University, Mikhail Kats gets dressed. Mesh shoe covers, face mask, hairnet, pale-gray jumpsuit, knee-high fabric boots, vinyl gloves, safety goggles, and a hood with clasps at the collar.This gear is not to protect him, Kats explains, but to protect the delicate equipment and materials inside the cleanroom.While working in applied physics at the Harvard School of Engineering and Applied Sciences, Kats spent countless hours in this cutting-edge facility. With his adviser, Federico Capasso, the Robert L. Wallace Professor of Applied Physics and Vinton Hayes Senior Research Fellow in Electrical Engineering, Kats has contributed to some stunning advances.One is a meta-material that absorbs 99.75 percent of infrared light, which is quite useful for thermal imaging devices. Another is an ultrathin, flat lens that focuses light without imparting the distortions of conventional lenses. And the team has produced vortex beams, light rays that resembles corkscrews, which could help communications companies transmit more data over limited bandwidth.The most colorful advance to emerge from the Capasso lab, however, is a technique that coats a metallic object with an extremely thin layer of semiconductor, just a few nanometers thick. Although the semiconductor is a steely gray, the object ends up shining in vibrant hues. That’s because the coating exploits interference effects in the thin films. Kats compares it to the iridescent rainbows that are visible when oil floats on water. Carefully tuned in the laboratory, these coatings can produce a bright, solid pink — or, say, a vivid blue — using the same two metals, applied with only a few atoms’ difference in thickness.Capasso’s research group announced the finding in 2012. But at that time they had only demonstrated the coating on relatively smooth, flat surfaces such as silicon. This fall, the group published a second paper, in the journal Applied Physics Letters, taking the work much further.“I cut a piece of paper out of my notebook and deposited gold and germanium on it,” Kats said, “and it worked just the same.”That finding, deceptively simple given the physics involved, now suggests that the ultrathin coatings could be applied to essentially any rough or flexible material, from wearable fabrics to stretchable electronics.“This can be viewed as a way of coloring almost any object while using just a tiny amount of material,” Capasso said.It was not obvious that the same color effects would be visible on rough substrates, because interference effects are usually highly sensitive to the angle of light. And on a sheet of paper, Kats said, “There are hills and valleys and fibers and little things sticking out. That’s why you can’t see your reflection in it. The light scatters.”On the other hand, the applied films are so extremely thin that they interact with light almost instantaneously. Looking at the coating straight on or from the side — or, as it turns out, looking at those rough imperfections in the paper — doesn’t make much difference to the color. And the paper remains flexible, as usual. Mikhail_11_570 “It’s very valuable for the same person who comes up with an idea to also fabricate it, because you learn so much while you’re doing it,” Kats says. “You can be creative, discover something along the way, apply something new to your research.” Mikhail_02_570 Discovering a new way to create colorful coatings using minimal materials required a mixture of applied physics and “arts and crafts,” Mikhail Kats jokes. The coatings could be used on fabrics and other flexible materials, or incorporated into optoelectronic devices like solar cells. Photos by Eliza Grinnell/Harvard SEAS Communications Mikhail_09_570 Inside the chamber, the electron beam vaporizes the germanium, which travels upward and lands on the sample, depositing a very even layer over the gold and the stencil. “The lower the pressure, the better the deposition,” Kats explains. Otherwise, air molecules can deflect the germanium atoms. Mikhail_12_570 The e-beam evaporator has deposited approximately 12 nanometers of germanium onto the sample. Mikhail_07_570 The paper sample is mounted near the top of the chamber. Below it, a carbon crucible holds a piece of germanium where a high-powered stream of electrons will bombard it. Various probes within the chamber provide information about the air pressure and deposition rate. Mikhail_13_570 The sample, fresh out of the chamber. The paper stencil has turned gray, the natural color of germanium. But where the germanium has landed on the gold-coated paper, the color is violet. Mikhail_06_570 The germanium will only land on the exposed areas; beneath the stencil, the paper will remain gold. Mikhail_08_570 A cryopump sucks all the air out of the chamber until the pressure is only a billionth of an atmosphere. Kats uses dials on the front to increase the current and voltage by hand, sending a beam of electrons toward the crucible. “Sometimes you want to have a lot of control,” he says. “It’s just like baking.” Mikhail_05_570 Kats mounts the paper sample upside-down in the electron-beam evaporator. Atoms of germanium will be deposited on it from below. Mikhail_03_570 Kats has taken a sheet of paper from his cleanroom notebook, coated it in about 30 nanometers of gold, and pinned a paper stencil on top of it. The silver-colored germanium (pictured at right) is ready for application.
“Overstay visas were only issued to Chinese citizens in Indonesia whose visas had expired but who could not go back to their country because of the virus outbreak and because there was no means of transportation to take them there,” Arvin said. Airlines and airports have suspended all flights to and from mainland China following the government’s decision to impose a temporary travel ban to and from the country on Feb. 5.There have been no confirmed COVID-19 cases in Indonesia to date. (gis)Topics : Immigration authorities denied entry to 118 foreigners in February in an effort to prevent the novel coronavirus disease (COVID-19) from spreading to the country.“The foreigners had lived in or visited China 14 days before arriving in Indonesia,” immigration spokesperson Arvin Gumilang said in a written statement on Sunday, adding that the denial of entry was in keeping with a 2020 Law and Human Rights Ministerial Decree that had been issued in response to the coronavirus outbreak.The Immigration General Directory has issued overstay visas for 1,247 Chinese nationals across the country.
Dear readers,Syracuse heads into the 2016 season without five of its top six scorers from last season. Coming off an NCAA tournament quarterfinal loss to Johns Hopkins, the Orange turns to old and new faces to fill the offensive voids. Fifty-goal-scorer Dylan Donahue strives to orchestrate the offense while staying out of the spotlight. Jordan Evans, donning the symbolic No. 22, hopes to finally meet the expectations that accompany the number. Midfielder Derek DeJoe, whose shot can reach 111 miles per hour, wants to be known for more than just a laser. Also read about women’s players Riley Donahue and Allie Murray, who will be integral on an SU team picked atop the ACC. Enjoy our stories and thank you for reading!Matt Schneidman, Sports Editor Comments
Les Kiss has called upon Iain Henderson and Jared Payne following their Ireland exploits just last week for the trip to Dragons. Kick off at Rodney Parade is at 7.35. Scarlets start the night four-points adrift of Ulster in the table ahead of the visit of Edinburgh to Parc Y Scarlets where there’s a 7.05 start.