Scientists Build AntiMosquito Laser

first_img Citation: Scientists Build Anti-Mosquito Laser (2009, March 16) retrieved 18 August 2019 from https://phys.org/news/2009-03-scientists-anti-mosquito-laser.html Explore further The anti-mosquito laser was originally introduced by astrophysicist Lowell Wood in the early 1980s, but the idea never took off. More recently, former Microsoft executive Nathan Myhrvold revived the laser idea when Bill Gates asked him to explore new ways of combating malaria. Now, astrophysicist Jordin Kare from the Lawrence Livermore National Laboratory, Wood, Myhrvold, and other experts have developed a handheld laser that can locate individual mosquitoes and kill them one by one. The developers hope that the technology might be used to create a laser barrier around a house or village that could kill or blind the insects. Alternatively, flying drones equipped with anti-mosquito lasers could track the insects with radar and then sweep the sky with the laser.The researchers are tuning the strength of the laser so that it kills mosquitoes without harming other insects or, especially, people. The system can even distinguish between males and females by the frequency of their wing movements, which may be important since only females spread the parasite. In experiments, the system could target mosquitoes with a flashlight, and then uses a zoom lens to feed the data to the computer, which fires at the insect. Each time the laser strikes a mosquito, the computer makes a gunshot sound. When the mosquito is hit, it bursts into flame and falls to the ground, and a thin plume of smoke rises. The anti-mosquito laser is just one of many novel ways to kill the disease-carrying insects, in addition to the conventional strategy of vaccinating humans. Other ideas include devices that disrupt the mosquitoes’ senses of sight, smell, and heat; feeding them poisoned blood; infecting them with a genetically altered bacterium; and creating a malaria-free mutant to overtake the natural mosquitoes.via: Wall Street Journal© 2009 PhysOrg.com A laser that kills mosquitoes could help reduce the spread of malaria. Image credit: PlaneMad/Wikipedia Protein plays key role in transmitting deadly malaria parasite (PhysOrg.com) — In an effort to prevent the spread of malaria, scientists have built a laser that shoots and kills mosquitoes. Malaria, which is caused by a parasite and transmitted by mosquitoes, kills about 1 million people every year. 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.last_img read more

Bees helping to monitor air quality at German airports

first_img Explore further Citation: Bees helping to monitor air quality at German airports (2010, July 1) retrieved 18 August 2019 from https://phys.org/news/2010-07-bees-air-quality-german-airports.html Using bees for biomonitoring of environmental health around airports is a recent development, but insects have been used successfully for some time to monitor water quality at a number of sites.The honey produced at the airports is tested in the laboratory twice a year for heavy metals and certain hydrocarbons, and has so far been found to be comparable to honey produced in non-industrial areas. Volker Liebig, a chemist with Orga Lab, which tests the samples, said more data is needed over a longer period for the results to be conclusive, but he said preliminary results looked promising.Düsseldorf International Airport’s community liaison officer Peter Nengelken said this year’s first batch of honey, harvested in June from the 200,000 bees at the airport, had been tested and found to contain toxin levels far below recommended limits, and about the same as honey from rural areas. This is consistent with the results from the previous years since the bee monitoring began in 2006. Air quality at all the airports is also monitored in more traditional ways.Pollution at airports has a number of sources, including aircraft, cars, buses, and industries, which often cluster in the vicinity of airports. Around the world the air quality around airports is monitored, and the stringent monitoring requirements set by the International Civil Aviation Organization, a body of the United Nations, have led to a substantial reduction in pollution at major airports.Pollution reduction has been achieved by the development of cleaner aircraft engines and ground support vehicles, and by improvements in equipment operation procedures. Even so, some community groups remain concerned, especially about lead levels and the presence of ultrafine particles originating from jet aircraft, cars and trucks. In Germany, airport officials view the bees as a simple and easy-to-understand way to demonstrate to the public that airports are much cleaner and safer than they once were.The health effects of ultrafine particles are unknown as yet but there is some research suggesting they may pose a risk because the particles are fine enough to pass through cell walls and may be able to penetrate into the brain and other organs. Ultrafine particle emissions are currently not regulated in the US, but there are limits for vehicle emissions of ultrafine particles in Europe.The bees at Düsseldorf International airport are kept by local beekeepers, and the honey is bottled as “Düsseldorf Natural” and given away. Hidden threat: Elevated pollution levels near regional airports © 2010 PhysOrg.com 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) — Air quality around eight airports in Germany is being monitored with the help of bees, whose honey is tested regularly for toxins.last_img read more

Chinese propose method for deflecting asteroid Apophis

first_img Apophis is approximately 880 feet in diameter and weighs an estimated 46 million tons. If it were to strike the earth, it would most certainly cause damage for thousands of miles around the epicenter, but wouldn’t spell doom for the planet as a whole.First discovered in 2004 by Roy Tucker, David Tholen and Fabrizio Bernardi at the Kitt Peak National Observatory, Apophis was after initial study, thought to have a possibility of hitting the earth; then after further study, it appeared that an impact was unlikely. Then later it was noted that when Apophis makes a close approach in 2029, there is a possibility that it could pass through what is known as a “keyhole” (a small gravitational zone near enough a planet to alter the course of an object) near our planet that could cause the next pass, in 2036, to hit us. Because of the dizzying number of variables involved in such a scenario, however, there appears to be differing views as to the probability of that actually happening. There also seems to be some disagreement as to the origin of its name; some suggest that Apophis comes from the ancient Egyptian deity, enemy of the uncreator Ra, Apep. Others suggest it’s simply a nod to the character Apophis on the television show Stargate SG-1.In either case, Gong et al, propose using a space vehicle propelled by a solar sail that would move in a retrograde (opposite) orbit relative to Apophis fast enough so that when the collision occurred (like two cars running head on into each other on a freeway) the vessel would strike the asteroid moving at a relative speed of some 55 miles per second, enough they say, to push the offending asteroid off its current path.The problem is, as the Chinese group readily admit, is in being precise enough in aiming the vessel. With all the variables at play (including the years it would have to travel) it would seem an almost impossible task. Nonetheless, the team seems undaunted, suggesting that such a vehicle could be built and launched in the time frame available. 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. Orientation of the sail cone and clock angles. Image: arXiv:1108.3183v1 [astro-ph.IM] More information: Utilization of H-reversal Trajectory of Solar Sail for Asteroid Deflection, Shengping Gong, Junfeng Li, Xiangyuan Zeng, arXiv:1108.3183v1 [astro-ph.IM] arxiv.org/abs/1108.3183AbstractNear Earth Asteroids have a possibility of impacting with the Earth and always have a thread on the Earth. This paper proposes a way of changing the trajectory of the asteroid to avoid the impaction. Solar sail evolving in a H-reversal trajectory is utilized for asteroid deflection. Firstly, the dynamics of solar sail and the characteristics of the H-reversal trajectory are analyzed. Then, the attitude of the solar sail is optimized to guide the sail to impact with the object asteroid along a H-reversal trajectory. The impact velocity depends on two important parameters: the minimum solar distance along the trajectory and lightness number. A larger lightness number and a smaller solar distance lead to a higher impact velocity. Finally, the deflection capability of a solar sail impacting with the asteroid along the H-reversal is discussed. The results show that a 10 kg solar sail with a lead-time of one year can move Apophis out of a 600-m keyhole area in 2029 to eliminate the possibility of its resonant return in 2036.Via ArXiv blog Explore further NASA Statement on Student Asteroid Calculations © 2011 PhysOrg.com Citation: Chinese propose method for deflecting asteroid Apophis (2011, August 22) retrieved 18 August 2019 from https://phys.org/news/2011-08-chinese-method-deflecting-asteroid-apophis.html (PhysOrg.com) — Chinese scientist Shengping Gong and associates at Tsinghua University in Beijin have proposed an alternative method of deflecting the asteroid Apophis to ensure that it does not strike the earth. They believe that rather than just blowing it up ala the European Space Agency’s Don Quijote project, a better approach would be to use a solar sail, as described in their paper on the preprint server arXiv, to slowly nudge the asteroid off its trajectory just enough to keep it from bothering us here on Earth. last_img read more

Robot firefighters help mitigate hazardous conditions

first_img(Phys.org)—Events worldwide remind us of the fact that modern-day fire-fighting has taken on added complexities such as explosions, chemical leaks, and nuclear accidents. In fact it was after Fukushima that two brothers in Waterboro, Maine, resolved to start making their fire-battling robots. The two had been working with the military and they realized how applicable their machines might be to help out in natural disasters. “We could have helped out in Fukushima,” they said, and they resolved to come up with robots that can reduce the exposure of human firefighters to out-of-control fires. Their company, Howe and Howe Technologies, offers a set of robots, in modular fashion, that are designed to clear paths, pull debris and bodies out of the way, and spray water, and the robots can be transported on an all-terrain customized truck. The Howe and Howe portfolio of robots includes the “Guardian” that uses its robotic arm to move debris out of the way of the disaster scene, the “Terra Maxa,” to clear the way with a plough, and the “Thermite” which uses a multidirectional nozzle that can spray 600 gallons of water every minute. Explore further 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. The creators developed the robots over three months. They were helped by a grant from the U.S. Department of Homeland Security, which is interested in new gear for first responders. The Thermite alone would cost $98,500. Howe and Howe Technologies have commercialized their firebots for sale. The two brothers note that their helpers are not intended to replace firefighters but to be another tool that human firefighters can use to save lives including those performing the rescue operations. The idea is to use the robots to bring the situation under control. Once under control the firefighters can go in to continue putting out the fire and assist victims. © 2012 Phys.org Citation: Robot firefighters help mitigate hazardous conditions (2012, October 7) retrieved 18 August 2019 from https://phys.org/news/2012-10-robot-firefighters-mitigate-hazardous-conditions.html South Korea’s little firefighting robots (w/ Video) The Thermite is the centerpiece, a fire-fighting and emergency response robot propelled by caterpillar tracks which is remote-controlled from up to 1/4 mile away. The robot is hand-made from steel and aircraft-grade aluminum. The Thermite is small and compact enough to go through average door widths. Startup time to assume full robot functions is five seconds. The robots can arrive at the scene on the back of a truck called the “Bulldog,” a non-robotic component that acts as the water source for Thermite. The truck is outfitted with 54″ tires and can cross rugged terrain. More information: howeandhowe.com/robotics.php#last_img read more

Field study shows group decision making not always the best

first_img Explore further More information: Ant colonies outperform individuals when a sensory discrimination task is difficult but not when it is easy, PNAS, Published online before print July 29, 2013, doi: 10.1073/pnas.1304917110 Abstract”Collective intelligence” and “wisdom of crowds” refer to situations in which groups achieve more accurate perception and better decisions than solitary agents. Whether groups outperform individuals should depend on the kind of task and its difficulty, but the nature of this relationship remains unknown. Here we show that colonies of Temnothorax ants outperform individuals for a difficult perception task but that individuals do better than groups when the task is easy. Subjects were required to choose the better of two nest sites as the quality difference was varied. For small differences, colonies were more likely than isolated ants to choose the better site, but this relationship was reversed for large differences. We explain these results using a mathematical model, which shows that positive feedback between group members effectively integrates information and sharpens the discrimination of fine differences. When the task is easier the same positive feedback can lock the colony into a suboptimal choice. These results suggest the conditions under which crowds do or do not become wise. Citation: Field study shows group decision making not always the best (2013, August 1) retrieved 18 August 2019 from https://phys.org/news/2013-08-field-group-decision.html Proportion of simulated individuals and colonies (population 100) selecting the better of two nests. Colonies perform better when the quality difference between the nests is small, but individuals choose more accurately when the difference is greater. Credit: PNAS, doi: 10.1073/pnas.1304917110 Ants share decision-making, lessen vulnerability to ‘information overload’ Journal information: Proceedings of the National Academy of Sciencescenter_img (Phys.org) —A combined team of researchers from Arizona State University and Uppsala University in Sweden has found that collective decision making by ants doesn’t always result in selecting the best option for adopting a new nest. In their paper published in Proceedings of the National Academy of Sciences, the team describes experiments they conducted with ants and artificially lit nests to determine how the ants chose the best option. © 2013 Phys.org Temnothorax rugatulus, a type of ant that lives in Arizona, builds its nest in the ground—it has to pick a spot first however, and they way an ant colony does so was the focus of this new effort. The team wanted to know if collective decision making was always superior to that of individual ants.To find out, the researchers set up an environment where a colony of ants found itself in need of a new nest. Each test run involved a colony that had to choose between a control nest and one that varied in quality. Quality was based on how much light could enter the nest from holes that led to the surface. The more light, the lower the quality—ants like it dark and fewer holes mean less heat loss.The team noted that when one of the nests was obviously far superior to the other, both the colony as a whole, and individual ants more often chose the better option. What was surprising, however, was that individuals had a slightly better hit rate then the colony as a whole.When a colony “decides” it needs a new nest, scout ants are sent out to find a new site. When one of the scout ants finds one it likes, it releases a chemical that attracts another of the colony members. If that member also likes the site it too will release a chemical attracting another ant and so on. The site that gets the most “votes” is the one eventually chosen by the colony. But, when a single ant is forced (by the researchers) to make a decision about which site to pick, it has to look at all the options and make a decision on its own—that takes more time than the multiple ant approach because in that scenario, individual ants only ever review one site—its more efficient. It’s also more likely to lead to errors of course and that’s why the colony as a whole tended to choose the wrong best site more often than the single ants—when the choice was obvious—who could make the decision without having to waste time thinking it over. 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.last_img read more

A type of semitransparent polymer that can be mended at room temperature

first_imgCredit: Yu Yanagisawa A small team of researchers at the University of Tokyo has created a polymer that can be repaired when broken into two parts by applying a small amount of pressure at room temperature. In their paper published in the journal Science, the group describes how they came upon the polymer, how it was made, and how well it can be repaired. Materials may lead to self-healing smartphones 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 Journal information: Science The researchers report that to test the material, they cut a small tile into to two pieces, then pressed the two pieces together into the original configuration using just a small force at room temperature. After 30 seconds, they further report, the healed tile could support a 300-gram weight. They note that pressing the material for longer amounts of times allows for even stronger bonds to form—eventually, after a couple of hours, the material reaches the same degree of bonding as it had prior to being cut or broken.More work will have to be done with the material before it can be used in a smartphone screen, however, such as making it more transparent. More information: Yu Yanagisawa et al. Mechanically robust, readily repairable polymers via tailored noncovalent cross-linking, Science (2017). DOI: 10.1126/science.aam7588AbstractExpanding the range of healable materials is an important challenge for sustainable societies. Noncrystalline, high molecular weight polymers generally form mechanically robust materials, which, however, are difficult to repair once they are fractured. This is because their polymer chains are heavily entangled and diffuse too sluggishly to unite fractured surfaces within reasonable timescales. Here, we report that low molecular weight polymers, when cross-linked by dense hydrogen bonds, give mechanically robust yet readily repairable materials, despite their extremely slow diffusion dynamics. A key was to utilize thiourea, which anomalously forms a zigzag hydrogen-bonded array that does not induce unfavorable crystallization. Another key was to incorporate a structural element for activating the exchange of hydrogen-bonded pairs, which enables the fractured portions to rejoin readily upon compression. Engineers around the world have been working hard to find a type of glass or plastic that can be healed easily when broken to address the problem of broken screens on phones and other portable devices. While some progress has been made, there still exists a need for something better. In this new effort, the researchers report on a new type of plastic that can be healed by simply pressing the broken pieces back together.As the researchers describe it, a team member was investigating glue properties with polymers when they discovered that one of the polymers under study could mend itself just by pushing the pieces together. Intrigued, the group looked closer. They found that the hydrogen bonds in the polymer formed in a way that did not crystallize, allowing the molecular chains to move freely. This allowed the bonds to re-form easily under just a small amount of pressure. After working with several configurations, the team settled on a polymer called polyether-thioureas (TUEG3)—it offered the best healing properties of those tested. Citation: A type of semi-transparent polymer that can be mended at room temperature using small pressure (2017, December 19) retrieved 18 August 2019 from https://phys.org/news/2017-12-semi-transparent-polymer-room-temperature-small.html © 2017 Phys.orglast_img read more

Get some France in your system Delhi

first_imgAfter a successful stint in 2009, Bonjour India is back with its second edition in India.This three-month event from January to April will take place across the country over 16 cities. Organised by the Embassy of France in India and the Institut Français en Inde, in association with the Alliance Française India and the Indian Council for Cultural Relations (ICCR), this event is something they have been planning for two years. Speaking at the unveiling of the Bonjour India website, H.E. François Richier, Ambassador of France said: ‘Bonjour India is an invitation to discover and re-discover France through its whole artistic dimension. As a real cultural dialogue between French and Indian artists, Bonjour India shows the friendship that links France and India.’ Also Read – ‘Playing Jojo was emotionally exhausting’Max Claudet, director, Institut Français en Inde, cultural counsellor French Embassy in India  highlighted the programmes scheduled and also gave an insight into the main purpose behind  the festival.He said: ‘The event will be inaugurated by Luminocity, by light sculptor Patrick Rimoux and Nandita Palchoudhuri in Delhi and Mumbai, also Ballet Preljocaj on the stage designed by Subodh Gupta as part of an exchange between India and France in the field of art, literature, cinema, education, sports, architecture, fashion, photography and performing arts.’ Also Read – Leslie doing new comedy special with NetflixThe programme will kickoff with contemporary ballet, and then, One thousand years of peace by Bolshoi Theatre, and a grand show by Subodh Gupta, an aerial acrobatic show, Flying Angels, and a multidisciplinary show, Luminocity. In the dance section, there will be urban ballet Ganga, a choreographic piece uniting poetry, music and dance. In the music section, there will be a concert of sarod and symphony orchestra with electronic music. Composer Pierre Thilloy and Avignon Symphony Orchestra will  be in  performance with sarod maestro Ustad Amjad Ali Khan. Pain and Pleasure at the Court of Versailles is a Baroque music presentation by Amarillis ensemble. Christohe Chassol Indiamore and Scratch Bandits crew will also be performing.Gates to India Song will be a love story performed by Marguerite Duras with Indian artist Nandita Das. For visual arts, there are installations and interactive choreographic navigations called Bangalore Fictions, France Heritage bringing in the historical landmarks of France, Quintessence will showcase paintings by  Dominique Paulin and  photographs by Michel Kirch. There will also be exhibitions on urban development and sustainable architecture, photography and painting exhibitions by Anay Mann and Gigi Scaria, respectively revisiting French heritage in India,.Another aspect of this event will be the strong presence of French literary circle at the Jaipur Literature Festival. The celebrated Albert Camus’ birth centenary will also be celebrated across India through the event. Gear up Delhi.DETAILAt: 16 cities across IndiaWhen: January to April 2013last_img read more

The essence of Indian art

first_imgCurating concepts to interpret the idea of India, a battery of designers, artists, artisans, architects and the best of technicians collaborated to deliver what is India’s largest art in public space initiative, The Art Program. Amongst these large installations, two are ready to be shipped off to the Mumbai airport where they will become a part of a collective manifestation of the best our country has to offer. But before that, Delhi gets a special preview of these artworks on the 9 July in Mehrauli, where visitors will have the opportunity to see the art works and interact with the creators over High Tea.  Also Read – ‘Playing Jojo was emotionally exhausting’Over the last three years, Rajeev Sethi, an eminent scenographer and chairman of the Asian Heritage foundation spearheaded this programme to represent  21st century India in a manner that leaves visitors with no doubt that they are in India. The first work by Rajeev Sethi, Reappearances below the Tarmac was conceived as a play on the idea of the airport as a virtual metropolis, and the city that disappears and reappears around these 21st century hubs. The cross-runway unique to the Mumbai Airport transforms into a vortex amid an enormous mosaic reminiscent of the city as we fly in. Amid this terracotta skyscape fly mythical airplanes and whimsical flying machines crafted by the potters of Molela, a village near Udaipur, in a significant departure from the customary votive terracotta plaques of gods and goddesses they make. Interspersed between are contemporary studio photographs of young men and women, re-touched up by miniature painters. Also Read – Leslie doing new comedy special with Netflix The second, Touché, also by Rajeev Sethi, is inspired by the panchamahabhutas in a symbolic elemental greeting. These coalesce in various permutations and combinations to create the Universe and the five senses by which we perceive them. Air, the second element, born of the agitation created in the vast stillness of space by primordial sound, is expressed as the pavan (wind) and sparsh or the sense of touch. Interpreting Jaipur’s Hawa Mahal or Palace of Winds as a visual metaphor, Touché celebrates the gentle breeze in the arid desert as it wafts through intricate jaalis and the joyous indulgence in this simple sensual pleasure. Referencing the quintessentially tactile quality of textiles, the Hawa Mahal here morphs into an enormous pagdi or turban – insouciantly transforming textile into architecture. Head over to see these two art installations being displayed for the first and the only time in Delhi.last_img read more

A fine selection

first_imgThe Imperial presents the Sunday brunch with some new offerings this time. Live seared foie gras, display of raw seafood and fish like rainbow trout, clams, mussels, squids, perch, mackerel, scallops (steamed, baked, grilled etc.) are included in the menu.Home cured and preserved cold meats, home smoked duck and home smoked salmon complement the innovatively laid out non alcoholic hangover shots to get over the heavy head from last night’s party. That’s not all hand-made pasta made live and filled with the goodness of whole wheat, home-made fancy cup cakes and vegan ice creams, liquid sandwich/ sugarfee desserts, dainty french pastry – Macaroons, Eclairs, millefieulle, home grown microgreens  – wheat grass, lentils, green peas, red amaranthus, mustard cress, raddish cress etc, are truly a feast to satiate you heart and tummy at the same time.The feast also offers selection one special starter served on your table. Adding to it The Imperial also brings you to some  unbelievable choices of world cuisine, all under one roof.last_img read more

Harvard sued for racial profiling and targeting AsianAmericans

first_imgStudents for Fair Admissions says Harvard limits the number of Asian Americans it admits while giving preference to other races, according to the Project on Fair Representation (PFR), a legal defense fund supporting the lawsuit. ‘The university is engaging in a campaign of invidious discrimination,’ PFR said in a statement.‘White, African American and Hispanic applicants are given racial preferences over better qualified Asian Americans,’ it added, accusing Harvard of breaching civil rights laws and undermining the Fourteenth Amendment to the US constitution. Also Read – Pro-Govt supporters rally as Hong Kong’s divisions deepenPlaintiff the SFFA alleges that Harvard and the University of North Carolina at Chapel Hill violated the Supreme Court’s 2013 ruling on ‘strict scrutiny’ standards which says admissions should be conducted on ‘race-neutral’ grounds to end ‘race-based affirmative action policies,’ according to the PFR statement.The director of PFR vowed further action on race-based admissions policies at other universities in the United States.‘These two lawsuits are the first of what are expected to be several similar challenges to other competitive colleges that continue to unconstitutionally use racial preferences in admission decisions,’ said Edward Blum. SFFA said its members include ‘highly qualified’ students that have been rejected from Harvard and Chapel Hill, and their parents.last_img read more

Sri Lanka navy arrests 24 TN fishermen

first_imgThe Sri Lankan navy on Tuesday arrested 24 fishermen from here and also chased away at gun point several others for allegedly fishing in Lankan waters near Katchatheevu in the Palk Straits.More then 3,000 fishermen in 600 boats had put out to sea from here last night. The Lankan navy personnel came in 10 patrol boats and sea bikes, threatened the fishermen and arrested 24 of them besides chasing away others at gun point, fishermen organisation leaders S Emerite and Sagayaraj said. The fishermen were fishing near Katchatheevu in Palk Straits, they said claiming the fishermen were fishing in traditional waters. On October 10, the navy personnel had arrested 19 fishermen from Nagapattinam district on charges of violating the International Maritime Boundary Line prompting Tamil Nadu Chief Minister Jayalalithaa to write to Prime Minister Narendra Modi urging him to take up the continued arrests of state’s fishermen at a high political level with Sri Lanka.  In another instance on October 2, seven fishermen from Rameswaram had been arrested by Lankan naval personnel off Katchatheevu islet for allegedly crossing the IMBL and fishing in their waters.last_img read more

Suffered acne You may show fewer signs of ageing

first_imgSuffering from those itchy red pimples? Take heart, as your skin may age more slowly than those with no history of acne, a study has found. Signs of ageing such as wrinkles and skin thinning often appear much later in people who have experienced acne in their lifetime. It has been suggested that this is due to increased oil production but there are likely to be other factors involved, the study said. The findings revealed that people who have previously suffered from acne are likely to have longer telomeres in their white blood cells, meaning that their cells could be better protected against ageing. Also Read – Add new books to your shelfTelomeres are repetitive nucleotide sequences found at the end of chromosomes, which protect them from deteriorating during the process of replication.  The telomeres gradually break down and shrink as cells age, eventually leading to cell death, which is a normal part of human growth and ageing. “Our findings suggest that the cause could be linked to the length of telomeres which appears to be different in acne sufferers and means their cells may be protected against ageing,” said lead author Simone Ribero, a dermatologist at King’s College London.  Also Read – Over 2 hours screen time daily will make your kids impulsive“For many years dermatologists have identified that the skin of acne sufferers appears to age more slowly than in those who have not experienced any acne in their lifetime. Whilst this has been observed in clinical settings, the cause of this was previously unclear,” Ribero said.In the study the team measured the length of white blood cell telomeres in 1,205 twins. A quarter of the twins reported having experienced acne in their lifetime.Statistical analyses which adjusted for age, relatedness, weight and height showed that telomere length in acne sufferers was significantly longer, meaning that white blood cells were more protected from the usual deterioration with age. The researchers also examined gene expression in pre-existing skin biopsies from the same twins to identify possible gene pathways linked to acne.last_img read more

Divya Khosla Kumar dazzles on the ramp

first_imgThe gorgeous Divya Khosla Kumar made heads turn as she walked the runway for the Delhi based ace designer Parul J Maurya for her label ‘Ethnique River’ at Vaunt International Fashioner Week, presented by Usha Shriram Mobile Phones in The Umrao Hotel, Delhi. The designer showcased her collection ‘Traveller’ at the fashion week. The collection signified the new era of menswear, drawing an inspiration for modern age man who loves travelling, exploring; who is playful and free-spirited.last_img

The Oldest Cheese in Recorded History Found in an Egyptian Tomb

first_imgNo one is saying, “Bon appetit,” but it’s a discovery that is newsworthy, to say the least. The oldest solid cheese known to humanity was discovered in an ancient Egyptian tomb. Several years ago, scientists identified a “solidified whitish mass” in a collection of jars in the tomb of Ptahmes, the mayor of the ancient city of Memphis in the 13th century B.C.Cheese had never before been found in Ancient Egypt. Tests recently confirmed that it was cheese, made from a mixture of cow milk and either sheep or goat milk.Photo by University of Catania and Cairo UniversityThis ancient cheese would have had a “really, really acidy bite,” cheese historian and chemistry professor Paul Kindstedt told the New York Times.It was amazing to the researchers that the cheese lasted so long.“The interactions for thousands of years with the strong alkaline environment of the incorporating soil rich in sodium carbonate and the desert conditions did not prevent the identification of specific peptide markers which showed high stability under these stressing conditions,” said study author Viale A. Doria of the Department of Chemical Sciences, University of Catania, Italy.Rumi cheese (Egyptian Arabic: جبنه رومى‎ gebna rūmi [ˈɡebnæ ˈɾuːmi], also known as gebna torki [ˈtoɾki] in Alexandria) is one of the main types of cheese in Egypt. Photo by Tour d’Afrique CC BY 2.0The cheese might have posed a danger in the ancient world, interestingly.“Other peptides in the food sample suggest it was contaminated with Brucella melitensis, a bacterium that causes brucellosis,” the researchers said. “This potentially deadly disease spreads from animals to people, typically from eating unpasteurized dairy product.”Brucella melitensis colonies growing on agar.Brucellosis comes from consuming unpasteurized dairy products and it is still a problem today. Symptoms are fever, sweating and muscle aches.Chemist Enrico Greco says he did not sniff the cheese but given its degraded state it is unlikely to have an odor, pleasant or not, according to Live Science.The burial site, at the Saqqara necropolis near Cairo, was dug up in 1885. But, after being lost, it was rediscovered in 2010.The oldest standing step pyramid in Egypt,designed by Imhotep for King Djoser, located in Saqqara, an ancient burial ground at 20 miles south of modern-day Cairo.Many discoveries have been made in the last year in ancient Egypt, including the fact that embalming took place much earlier than researchers realized.A prehistoric mummy found near the banks of the Nile holds the key to understanding the “recipe.” The mummy is dated to about 5,600 years ago, but the ingredients used to preserve it were also employed much more recently in the history of Egypt.The continuity in the mummification recipe means that it must have been invented in the distant past.The ancients mixed plant oil, heated resin from conifers, a plant gum or sugar, and an aromatic plant extract into a sticky paste that was then spread on the fabric wrappings. It seems that antibacterial properties seeped through the textiles to prevent decay.University of York archaeologist Stephen Buckley said to the BBC, “Until now, we’ve not had a prehistoric mummy that has actually demonstrated — so perfectly through the chemistry — the origins of what would become the iconic mummification that we know all about.”Most recently, archaeologists found dozens of mummified cats.An Egyptian archaeologist cleans mummified cats during the demonstration of a new discovery made by an Egyptian archaeological mission through excavation work at an area located on the stony edge of King Userkaf pyramid complex in Saqqara Necropolis, south of the capital Cairo, on November 10, 2018. Photo credit KHALED DESOUKI/AFP/Getty ImagesAn Egyptian archaeological mission recently discovered the cat mummies in seven ancient tombs that are believed to be 6,000 years old, at a site in a pyramid complex in Saqqara, south of Cairo.Antiquities minister Khaled el-Enany said the team also discovered a rare collection of mummified scarab beetles.Three of the tombs were devoted to the cats, which held a special place in ancient Egypt and were mummified as religious offerings.Besides the cat mummies, the scientists found 100 wooden and gilded statues of cats and one in bronze dedicated to the cat goddess Bastet.Read another story from us: The Oldest Weapons Ever Used by Humans in North America Found in TexasCats were respected for their ability to kill poisonous snakes and were believed to have protected the pharaohs since the time of at least the First Dynasty.last_img read more

DNA Testing Reveals Identity of Worlds Oldest Natural Mummy

first_imgA legal battle that has raged over a 10,600-year-old ancient skeleton called the “Spirit Cave Mummy” ended after advanced DNA sequencing found it was, after all, related to a Native American tribe. Scientists were finally able to prove the Spirit Cave Mummy, the world’s oldest natural mummy, was related to Native Americans living in Nevada today, the Fallon Paiute-Shoshone Tribe.Lake Lahontan. Photo by Decumanus ( CC BY-SA 3.0 )Tribe members had asked for the Ice Age-era remains for burial, but their request had been denied repeatedly.The Spirit Cave Mummy study was part of an ambitious international project that genetically analyzed the DNA of a series of disputed ancient remains found in North and South America, which also included Lovelock skeletons, the Lagoa Santa remains, an Inca mummy, and the oldest remains in Chilean Patagonia.Location of Lagoa Santa within Minas Gerais. Photo by Raphael Lorenzeto de Abreu CC BY 2.5The study also looked at the second oldest human remains on the continent, from Trail Creek Cave in Alaska. It was a 9,000-year-old milk tooth from a young girl.A statement from the Fallon Paiute-Shoshone Tribe said they “had a lot of experience with members of the scientific community, mostly negative.”It added: “However, there are a handful of scientists that seemed to understand the tribe’s perspective and Eske Willerslev was one of them. His new study confirms what we have always known from our oral tradition and other evidence – that the man taken from his final resting place in Spirit Cave is our Native American ancestor.”Professor Eske Willerslev with Donna and Joey, two members of the Fallon Paiute-Shoshone tribe.Photo by Linus Mørk, Magus FilmScientists had sequenced 15 ancient genomes, enabling them to track the movements of the first humans as they spread across the Americas at “astonishing” speed during the Ice Age.“Throughout the last three decades many methodological advancements have been made which have facilitated the retrieval of ancient DNA from human remains,” José Victor Moreno Mayar, first author of the study from the Centre for GeoGenetics at the University of Copenhagen, told Newsweek. “Today we are able to get DNA from remains that have been deposited, for thousands of years, in settings that make DNA preservation unlikely.”Their research confirms that the first Native Americans traveled from Asia into Alaska some 25,000 years ago “and once they moved into mid-latitude America, they followed a north to south route with some populations staying behind at different locations at different times; after that, it seems that established populations did not interact much with one another,” he said.Sumidouro Lake in Lagoa Santa, Brazil. Photo by Natural History Museum of DenmarkHowever, an important connection was confirmed between the Spirit Cave Mummy and Lagoa Santa when scientists identified  genetic heterogeneity between the mummy in Nevada and the 10,400-year-old remains in southwest Brazil, “signifying that it took roughly 200 years for these groups of early humans to travel a distance of over 6,000 miles.”Spirit Cave Mummy was controversial because of questions over who could claim the remains. This had to do with the Paleoamerican theory, that a different set of human species besides Native Americans lived in North or South America.A bison hunt depicted by George CatlinThe DNA study finally dismissed the Paleoamerican idea, which was mostly based on skull dimensions.Professor Eske Willeslev, who holds positions both at St John’s College, University of Cambridge, and the University of Copenhagen, and who led the study, said: “Our study proves that Spirit Cave and Lagoa Santa were actually genetically closer to contemporary Native Americans than to any other ancient or contemporary group sequenced to date.”Spirit Cave Mummy was found in the 1940s and for a while, researchers thought it was 2,000 years old.Twenty years ago, the Fallon Paiute-Shoshone tribe, which is based near to the burial site, claimed cultural affiliation and requested the remains be returned for burial under the Native American Graves Protection and Repatriation Act.Read another story from us:  Lost Ancient Greek City Founded by Trojan Survivors DiscoveredBut anthropologists argued that the remains were important to understanding the first inhabitants of North America. The request was refused and there was a lawsuit between the tribe and the federal government.last_img read more

The Bizarre Memoirs of a Schizophrenic Inspired Freuds Theories on the Illness

first_imgDaniel Paul Schreber, born in 1842, was a German magistrate. He also had severe and chronic schizophrenia and wrote books about his struggles with his illness. His father was a doctor and author, who wrote on the topics of child-rearing, public health, and exercise, and it’s been theorized that Schreber’s mental health issues were the result of his father’s unusual perspective on parenting.The other thing that Schreber is known for is his Memoirs of my Nervous Condition, in which he talks at length about his inner world.Daniel Paul SchreberSigmund Freud read Schreber’s book and treated it as a case history, interpreting the work and its implications for the state of Schreber’s mind. That interpretation became the basis for Freud’s understanding of paranoid schizophrenia.Freud’s case histories were usually put together from first-hand accounts of patients he was treating, but Freud never treated Schreber, nor was there reason to think that they ever consulted, according to Psychologist World.Schreber was the second child of five, born to a comfortable family. His father was a well-known physician who became the director of a sanatorium in Leipzig. Schreber’s older brother, Gustav, studied law, and Schreber followed him in that pursuit. Both brothers ended up becoming judges.Sigmund Freud, founder of psychoanalysis.Mental illness was present throughout the family. Their father, for all his renown, suffered from depression, and so did Gustav, who ultimately committed suicide in 1877.According to his notes, Schreber had his first breakdown after trying to go into politics but failing to be elected. This resulted in his developing hypochondria and spending six months in a psychiatric hospital.On his release, he was relatively normal for the next eight years, until being appointed as a judge for the Supreme Court of Appeals brought on a new set of symptoms. He began suffering from nightmares and insomnia, and developed some unusual sexual behaviors.Daniel Paul Schreber c. 1890.He attempted suicide and landed back in the hospital, where he stayed from 1894 to 1902. It was during this time that he wrote his Memoirs. After his release, he had five more good years; he and his wife even adopted a teenage daughter in 1906. The following year, however, his wife died and he returned to the hospital. He stayed there until his death in 1911.In his Memoirs of my Nervous Condition, Schreber describes various thoughts and symptoms that he battled. He had sensory issues with light and sound — both often seeming overwhelming. He began to have “morbid fantasies,” thinking, for example, that he was suffering from some type of plague.Sigmund FreudHe could sit for extended periods of time in a “hallucinatory stupor.” He began having auditory hallucinations and delusions, including many ideas of a religious nature and believed he was talking directly with God. One of those ideas was that it was his responsibility to save the world, and the only way he could do it was to become a woman and create a new population that was fathered by God.After reading Memoirs, Freud did an intensive analysis of Schreber based on the text. He was especially interested in what he saw as Schreber’s emasculation fantasies, and how they tied into his religious delusions.Group photo 1909 in front of Clark University. Front row: Sigmund Freud, G. Stanley Hall, Carl Jung; back row: Abraham A. Brill, Ernest Jones, Sándor Ferenczi.Prior to his illness, Schreber had never been particularly religious. Freud concluded that Schreber had a “redeemer delusion,” and that his need to be emasculated was part of the religious role he had been assigned.Freud further concluded that the assertion that he needed to become a woman was an expression of homosexual impulses felt toward his father and brother and that the voices he heard calling him “Miss Schreber” were due to guilt over those feelings. The voice of God that Schreber spoke with, Freud concluded, had to be transference of his feeling for his first therapist at the beginning of his illness.Freud’s beliefs that schizophrenia was rooted in homosexual conflicts is far removed from our current understanding about the root causes of the disease; it may have even slowed the development of a more functional understanding of the condition. It’s also true that his ideas were shaped by his observations of certain patients who suffered from the condition and hardly allowed for a widespread analysis and comparison.He did, however, make an admirable job of identifying those of Schreber’s symptoms which are characteristic of the disease: the paranoia, the hallucinations, and the delusions, especially those of a religious nature.Even if his understanding been more accurate, and Freud had met with and treated Schreber directly, the sad truth is that little could have been done during that period of time to relieve Schreber’s symptoms. There was no real understanding of the neurochemical basis for the condition, let alone medications that could address it.Read another story from us: Freud analyzed Da Vinci’s subconscious through his painting “The Virgin & Child with Saint Anne”That doesn’t undervalue Freud’s contribution to existing ideas about the illness, though, nor does it take away from the brilliance and suffering of Daniel Schreber, whose book opened a door into a world that had previously been very hard for others to enter.last_img read more

VIDEO Seemingly adorable young Eagles fan coldly refuses to take souvenir football

first_img Advertisement Most kids would love for an NFL player to give them a touchdown ball, even if it’s from the opposing team. Not in Philly.After Chris Thompson scored a second quarter touchdown to give Washington the lead, he made a kind gesture by trying to give the football to a little girl wearing a Carson Wentz jersey. She wasn’t feeling the peace offering, and shot Thompson a nonplussed look while refusing to take the souvenir. The guy next to her swallowed his fan pride and took the ball.This girl may be 10, but she’s got as much street cred in Philly as anyone this morning.@Eagles fan of the week! Check out this girl @975TheFanatic @975Middays @jasonmyrt @HARRYMAYES975 #FlyEaglesFly pic.twitter.com/BDx0zZnYoi— Shawn (@Shawn_Soups) October 24, 2017last_img

VIDEO Northern Illinois fake punt on 4th and 18 from their own

first_img Of course, Duke capitalized and punched in the gift. Garbage bowl season is the time of year to throw caution to the wind, open up the playbook and run a trick play or two, but there are limits.Take Northern Illinois for example. The Huskies trailed Duke, 7-0 in the Quick Lane Bowl – which will always be The Little Caesars Bowl in our hearts – and thought they’d catch the Blue Devils off guard on a 4th and 18 from their own 10 with a fake punt. Bad idea.This isn’t Colts fake punt bad, but it’s a strong candidate for worst play call of the college football season. This is gross, even for the Quick Lane Bowl. Not. Even. Close. Advertisementlast_img

VIDEO Get your first look at LeBron scrimmaging with his new Laker

first_imgLeBron has been highly visible off the court since announcing his decision to head to the West Coast and join the Lakers, but we haven’t seen him balling with his new Laker teammates…until now.The Lakers posted a video of LeBron running in a scrimmage with Kyle Kuzma, Lance Stephenson, JaVale McGee and some other new teammates. Based on the looks of it, LeBron is ready to pick up where he left off in the playoffs. It also looks like his debilitating hand injury from the Finals is fully healed and ready to go!This NBA season is going to be awesome.last_img

4 Bluetooth Headsets You Wont Be Embarrassed to Wear

first_img 2 min read Smooth OperatorThe Jawbone Icon HD ($100) looks good and sounds even better, thanks to HD audio, auto-adjusting volume and military-grade noise-elimination technology, all at an entry-level price point. It may be the best thing you hear all day. Smart SoundThe old-school mic on the Plantronics Voyager Legend UC ($200) lets your voice come through loud and clear, whether you’re connected to your phone, tablet or PC (through the USB dongle). Using smart sensors, the headset answers calls automatically when hooked on the ear and will stay put comfortably for its entire seven-hour battery life. Free Webinar | Sept. 9: The Entrepreneur’s Playbook for Going Global August 5, 2013 Critics of Bluetooth headsets liken them to Crocs and fanny packs: purpose-driven apparel that somehow became acceptable for the grocery store. But the four devices here do more than just sling your voice through the air, freeing up your hands to drive your car or tap away on your computer. They’re also crammed with noise-canceling technology and supported by apps. Some are even easy on the eyes, which makes them anywhere-appropriate. Register Now » Grab and GoSmaller than a set of keys, the Motorola Elite Silver ($130) fits easily into a pocket when not in use. Bonus: Its carrying case doubles as a charger, mobile battery and near field communication (NFC) transmitter chip–just tap it against your smartphone to pair the devices. Growing a business sometimes requires thinking outside the box. This story appears in the July 2013 issue of . Subscribe » Move OnThe Jabra Motion UC ($130) employs motion-sensor technology to answer calls automatically when the user puts it on. It also holds enough juice for seven hours of talk time and has a staggering range–up to 300 feet, compared to Bluetooth’s usual 30.last_img read more