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. Citation: The Raging Windows Worm has attacked over 8.9 Million Computers (2009, January 19) retrieved 18 August 2019 from https://phys.org/news/2009-01-raging-windows-worm-million.html Explore further (PhysOrg.com) — Last week the global internet community was hit by the Downadup worm also know as Conficker, or Kido. This worm is now using multiple ways of infecting computers, including USB sticks. If someone were to take a USB memory stick from one infected computer and plug it into another, it would infect that computer and the network as well. Once a USB memory stick is infected, there is no Microsoft patch to remove the worm. This attack has been more widespread on corporate networks because companies did not have the patch installed in time. This could have been caused by any number of reasons. For instance an IT Department may have been short handed or have workload related issues preventing the patch from being installed in a timely manner. Microsoft did a good job in having home computers updated with the patch but corporate networks are still being infected. This worm is very sophisticated because it exploits multiple secure flaws in Microsoft’s Windows OS’s. The worm starts by injecting itself into one of Microsoft’s common system process, services.exe. From there it creates a new random five letter DLL file in the Windows system folder. The Windows registry is then edited to make reference to the DLL file and runs when the computer is restarted.Once the worm is in the computer system, it creates an HTTP server and proceeds to download malware from the hacker’s websites. System restore has been wiped clean and reset on the computer making it impossible to restore your system prior to the infection. Each day there are hundreds of dummy domain names being generated by an algorithm coded in the worm but only one site is the actual malware site. With this trickery employed, it makes it very difficult to find what is being installed each day.This worm spreads mainly through corporate networks. An infected computer will scan the network for other computers and gain access through the Windows secure flaw. Even though a password is needed to gain access to other computers, it will guess short passwords by brute force method thereby gaining access to those computers.The only way to stop this worm is by applying Microsoft’s patch MS08-067 before computer networks get infected.© 2009 PhysOrg.com Headless Conficker worm lives in computers
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. Big Bang simulated in metamaterial shows time travel is impossible Spacetime analogs is an emerging field of physics in which scientists investigate systems having mathematical links with general relativity, and test their theories about the early behavior of the universe. The latest in a series of such experiments is one that uses spacetime analogs to model the end of time theory, dubbed the “Big Crunch,” at which the universe is predicted to contract and eventually collapse into a black hole. Citation: Metamaterials used to mimic the Big Crunch (2011, July 29) retrieved 18 August 2019 from https://phys.org/news/2011-07-metamaterials-mimic-big-crunch.html © 2010 PhysOrg.com More information: Hyperbolic metamaterial interfaces: Hawking radiation from Rindler horizons and the “end of time” arxiv.org/abs/1107.4053 An example of a spacetime analog is the behaviour of light in electromagnetic space, which is mathematically analogous to its behavior in spacetime. Recent developments have enabled scientists to use metamaterials to manipulate electromagnetic space and create electromagnetic analogs to the multiverse, quantum foam and the big bang.Now University of Maryland visiting research scientist Igor Smolyaninov and colleagues have developed an experiment using metamaterials to model the end of time.Metamaterials can be manipulated and forced to behave as various analogs, such as a system with two dimensions of space and one of time, or one with one dimension of space and two of time. The experiments designed by Smolyaninov and colleagues used a metamaterial comprising stripes of polymethyl methacrylate (PMMA), which were deposited on a gold film.Laser light traveling through the metamaterial is described by mathematical equations that are used to describe space and time. In the gold film the movement of photon-electron waves (plasmons) followed the equations representing a universe with two space dimensions and one time dimension, but in the metamerial they followed the equations of a universe with one space dimension and two time dimensions In the “end of time” experiment the photons became very hot, experiencing a sudden rise in energy and frequency, described as a “higher harmonic generation.”Smolyaninov analyzed what happened when the metamerial was placed at various orientations to the gold and discovered that if they were placed end on, with a space dimension perpendicular to a time dimension, time stops, which is essentially a simulation of “end of time”. When the metamaterial boundary is perpendicular to the “space-like direction” the scientists observed a Rindler horizon, which produces Hawking radiation. If it is perpendicular to the “time-like direction” time ends. The electromagnetic field diverges at the interface between the two materials.The experiment is described in the July 20 edition of arXiv, the physics preprint journal. Future experiments planned include adding quantum dot semiconductors to a metamaterial to allow the researchers to simulate the center of a black hole and look for an analog for Hawking radiation, predicted to exist at the edge of black holes.
A solar flare. Image: NASA More information: Superflares on solar-type stars, Nature (2012) doi:10.1038/nature11063Solar flares are caused by the sudden release of magnetic energy stored near sunspots. They release 1029 to 1032 ergs of energy on a timescale of hours. Similar flares have been observed on many stars, with larger ‘superflares’ seen on a variety of stars, some of which are rapidly rotating4, 5 and some of which are of ordinary solar type. The small number of superflares observed on solar-type stars has hitherto precluded a detailed study of them. Here we report observations of 365 superflares, including some from slowly rotating solar-type stars, from about 83,000 stars observed over 120 days. Quasi-periodic brightness modulations observed in the solar-type stars suggest that they have much larger starspots than does the Sun. The maximum energy of the flare is not correlated with the stellar rotation period, but the data suggest that superflares occur more frequently on rapidly rotating stars. It has been proposed that hot Jupiters may be important in the generation of superflares on solar-type stars, but none have been discovered around the stars that we have studied, indicating that hot Jupiters associated with superflares are rare. Journal information: Nature Explore further Some giant planets in other systems most likely to be alone 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. Citation: Kepler satellite telescope reveals hundreds of superflares on distant stars (2012, May 17) retrieved 18 August 2019 from https://phys.org/news/2012-05-kepler-satellite-telescope-reveals-hundreds.html Scientists have known about superflares for some time, though little is actually known about them. Nonetheless, over the past several years a near consensus had been reached regarding the reasons for their occurrence. Most in the field agreed that they were caused by interactions with what are known as “hot Jupiters,” huge planets in close proximity to the star. This new study undermines that theory; out of 365 superflares spotted occurring with 148 stars, not one of them had a hot Jupiter nearby. Because of this, astrophysicists are once again in the dark and must now go back and rethink the possibilities. Some have already suggested that instead of a hot Jupiter, perhaps there is a hot Earth situation occurring, i.e. a more distant cooler planet interacting with the star. Unfortunately, such an interaction would be far more difficult to observe because such planets wouldn’t change the amount of light observed by Kepler as would hot Jupiters when they pass between our planet and their star.The team also found that superflares occur more often with faster spinning stars; of the 365 superflares observed, only 101 occurred with slow rotating stars. They also found that stars that gave rise to superflares almost always had large sunspots as well. For these reasons, and because there is no evidence of such a large flare over the past 2000 years, the team doesn’t believe our own sun is capable of producing such large flares, which is good, because just one blast would destroy our ozone layer, making our planet uninhabitable in short order.Scientists believe that flares from our sun come about when magnetic field lines that are connected to magnetically active parts on the sun, which we observe as sun spots, snap like a cut wire, sending electrically charged particles into space. Unfortunately, the same model doesn’t appear to hold for superflares because of the differences in scale. Thus, more research will need to be done to see if other models or theories can be built to help better explain this mysterious phenomenon. (Phys.org) — Here on Earth we are occasionally concerned about solar flares due to the impact they can have on our electrical systems. But our solar flares are puny when compared to so-called superflares that occur with other stars. A new research study by a team from Japan’s Kyoto University has found after studying one patch of sky over a 120 day period in 1990 using data from the Kepler telescope, that superflares are rather common, and as they describe in their paper published in the journal Nature, some are a billion times as powerful as those that occur with our own sun. © 2012 Phys.Org
Research shows slight decline in big game antler, horn size Journal information: Proceedings of the National Academy of Sciences Trophy hunters target animals with particular body traits, such as a large body or a distinctive color. If this trait is heritable, hunting can remove animals with these traits from the gene pool, resulting in negative selection. For example, if animals inherit body size, and hunters seek out larger animals, then smaller animals will tend to live longer and be more likely to reproduce than larger animals, causing the percentage of large animals in the population to decrease.Earlier studies have shown that the average horn size of bighorn rams in trophy-hunted populations in Alberta and British Columbia has decreased over the past several decades. Trophy hunters prefer rams with the largest horns, particularly 4/5 degree curled horns. Some scientists have suggested that by hunting larger-horned rams but leaving smaller-horned rams alone, trophy hunters have encouraged evolutionary selection for small horns. Traill and his team wanted to see if trophy hunting really was creating an evolutionary response. To do this, they designed a mathematical model to show whether inheritance has a strong effect on body mass in Alberta’s Ram Mountain bighorn population. They studied body mass instead of horn size because there’s a strong correlation between the two, and they didn’t have enough field data on horn size to create a useful model.The researchers examined what would happen to body mass within the population if they increased the mortality rates of adult and senescent males weighing more than 100 kilograms. They found that decreasing the number of large adult males who lived long enough to reproduce had only a weak effect on inheritance.However, the model showed that there was a stronger effect on average body mass among older males and a shift in the sex ratio toward females. This suggests that while trophy hunting does not have a significant evolutionary effect, by removing larger males from the population, it causes average body mass – and therefore, average horn size – to decrease.The team suggests that regulators take such models into account when developing rules to promote conservation. 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. This Bighorn was seen just below the summit of Mt. Wheeler in New Mexico. Credit: Jwanamaker/Wikipedia Citation: Is trophy hunting affecting bighorn sheep evolution? Research says no (2014, August 13) retrieved 18 August 2019 from https://phys.org/news/2014-08-trophy-affecting-bighorn-sheep-evolution.html More information: Demography, not inheritance, drives phenotypic change in hunted bighorn sheep, Lochran W. Traill, PNAS, DOI: 10.1073/pnas.1407508111AbstractSelective harvest, such as trophy hunting, can shift the distribution of a quantitative character such as body size. If the targeted character is heritable, then there will be an evolutionary response to selection, and where the trait is not, then any response will be plastic or demographic. Identifying the relative contributions of these different mechanisms is a major challenge in wildlife conservation. New mathematical approaches can provide insight not previously available. Here we develop a size- and age-based two-sex integral projection model based on individual-based data from a long-term study of hunted bighorn sheep (Ovis canadensis) at Ram Mountain, Canada. We simulate the effect of trophy hunting on body size and find that the inheritance of body mass is weak and that any perceived decline in body mass of the bighorn population is largely attributable to demographic change and environmental factors. To our knowledge, this work provides the first use of two-sex integral projection models to investigate the potential eco-evolutionary consequences of selective harvest. © 2014 Phys.org (Phys.org) —Trophy hunters prize the Alberta bighorn sheep. They aim to adorn their walls with the largest rams’ horns they can obtain. In the past thirty years, average horn size has decreased, causing some scientists to believe trophy hunting is creating evolutionary pressure favoring rams with smaller horns. However, Lochran Traill and colleagues have created a model that simulates selective hunting and found it does not create a strong evolutionary response. The research appears in the Proceedings of the National Academy of Sciences.
Food in Athens with some complicated names for dishes may sound Greek! But even a die-hard Indian-food buff, wanting dal-vegetable-roti-rice on the plate each day, will find the fare in Greece quite welcome.To sum up Greek food, it is all about fresh, seasonal vegetables, extra virgin olive oil, yoghurt, salads, non-processed cheese, a fair dose of exotic herbs and condiments, daily catch of seafood and meats of every kind. Melizanosalata may not be a name that one can come to terms with right away. But this popular dish is made of a coarse puree of grilled or smoked eggplant, with olive oil, onions, tomatoes, garlic and herbs. Does it not remind you of our own bharta? It tastes as well. Also Read – ‘Playing Jojo was emotionally exhausting’Imam Baildi, again with eggplant onion, chopped garlic and tomatoes as main ingredients, literally means the Turkish holy man fainted – perhaps because it was so good, he gorged a bit too much on it.Then you have Tzatziki which is yoghurt blended with cucumber, garlic, dill, little oil and vinegar. Only that the Greek make their version of the raita – or dips – slightly thicker and creamier. It’s a good accompaniment for meze, which are small dishes, hot or cold, spicy or savoury, and grilled, baked fried, or boiled. Also Read – Leslie doing new comedy special with Netflix‘We eat everything. And when I mean everything, I mean every thing,’ said Stephanos, an art collector and gourmet-chef, also a tour guide by passion. ‘It is equally fun to wash it down with some Ouzo,’ he added, with a glint in his eyes, referring to the potent, traditional alcoholic drink flavoured with aniseed (saunf) that turns white and cloudy when water is added to dilute it.Greece, or the Hellenic Republic has many legends. Among them Archestratos, a Greek, is said to have written the first cookbook around 320 B.C. It also has a tradition of gourmet cooking, dating 4,000-5,000 years. Like cooking, Greece also has a long tradition of eating out. Tavernas are eating joints that are a bit more elaborate than our dhabas. Estiatorios are traditional upmarket restaurants. When you go to a traditional Greek restaurant, the starters are usually already laid out and will have most of these and more, including Keftedas – small fried balls of meat or vegetables and a favourite of Greek people. Like our koftas sans gravy.There is also sometimes roundels of egg plant the way you make baigun bhaja in the western quarters of India; only that Greeks let the vegetable taste its own, then spice it up slightly with turmeric or other condiments.One difference is that many dishes, the starters at least, are served cold, unlike the preference for hot in India.
The Singapore Armed Forces (SAF) on Sunday officially ended its deployment in the multinational search operation for the AirAsia plane, which crashed in the Java Sea December 28, with 162 people on board, the SAF said in a press release. The Singapore Navy ship MV Swift Rescue, which found the fuselage of the ill-fated plane, returned to the Changi Naval Base Sunday morning, citing the SAF.Singapore’s Minister for Defence Ng Eng Hen along with senior SAF officers, received MV Swift Rescue at the naval base, and a minute of silence was observed for the victims of the accident. Also Read – Pro-Govt supporters rally as Hong Kong’s divisions deepenNg praised the contributions of those who took part in the search operation. “Our SAF servicemen and women gave their best efforts for the search operations,” he said, adding that “their efforts helped bring closure to the families of the victims and provide answers to the cause of the accident.” The cockpit voice recorder, a part of the black box of the crashed plane, was retrieved on Tuesday from the Java sea floor and the main section of the fuselage of the aircraft was located on Wednesday. Rescue teams have so far recovered 48 bodies out of the 162 people who were aboard the aircraft. The return of MV Swift Rescue marked the end of SAF’s deployment.
American Centre, Motion Picture distribution association, India in collaboration with Cinedarbaar will be organizing a three day Black History Month Film Festival on the 5, 6 and 7 February at the American Center, in the Capital. The festival will show six films docu-fiction that highlights the issues of civil rights, African American citizens and their fight for justice. Beloved starring Oprah Winfrey based on a novel will begin the festival. The film is set after the American Civil war and centers on a former slave and her experiences. The second day of the festival will show films like The Rosa Parks Story by Julie Dash which shares experiences of the life of Rosa Park and her actions in civil rights followed by Talk to Me is a biographical film about a radio personality Petey Greene who was also a community activist in the 1960s. Also Read – ‘Playing Jojo was emotionally exhausting’The festival comes to an end with three contemporary films- 42 is a biographical sports film about baseball player Jackie Robinson who became the first African- American Player, Mandela: Long Walk to Freedom , again a biographical film on South African President. The closing film of the festival is the historical drama and a critically acclaimed film directed by Steven Mc Queen 12 years a Slave.The theme of the festival brings forth the observance of Black History month which is an annual celebration of achievements by black Americans. Black History month owes its origins to Carter G. Also Read – Leslie doing new comedy special with NetflixWoodsen who started the celebration of Negro History week in February since it coincided with birthday of Abraham Lincoln and Frederick Douglass (Social reformer). The festival will discuss such details; highlight the history, contemporary issues through sessions organized before the film screening by American Officials. Quiz on civil rights and black history month will be organized based on the films screened for the audience to win exciting prizes sponsored by the American Centre. Come and explore the dramas, docu fictions and take away the knowledge about the black history month by attending the interactive sessions and win exciting prizes. The entry to the festival is free and open for general public.When : January 5 to 7Where : American Centre
Kolkata: A preparatory meeting for the Bengal Global Business Summit (BGBS) 2019 was held on Monday.In 2019, BGBS is scheduled to be held on February 7 and 8. There were discussions on various aspects of the business summit at the meeting held at Nabanna Sabhaghar, in which senior officials of the Industry department were present.Sources said that the preparation for the summit starts a few months before it is scheduled to take place. It was in 2015 when the summit was organised for the first time and the venue of the mega event was Milan Mela ground till 2017. In 2018, the business summit was organised for the first time at Biswa Bangla Convention Centre. In 2019 also, BGBS will be organised at the same venue. Also Read – Rain batters Kolkata, cripples normal lifeRepresentatives of many countries attend the summit. More than 4,000 delegates from different parts of India and 32 countries were present in the summit. Japan, Germany, Italy, Poland, Republic of Korea, France, Czech Republic, UK and UAE were the Partner Countries. There were delegations from Europe, America and Asia as well.Every year, there used to be a road show at different places for promotion of the business summit. Sources said that there were discussions to identify the places where road shows will be organised for BGBS 2019 and to determine if they will take place abroad as well.It may be mentioned that there are several aspects that need to be looked after, to ensure successful completion of the summit and many departments of the state government work together to organise the same. It has been learnt that there was also discussions about better coordination between all the concerned departments. There will be many more meetings to finalise all the issues related to BGBS 2019, said an official.
Kolkata: Those who could not make it to the theme-based Puja pandals in the city will get a second chance to witness some during Jagadhatri Puja.A number of theme-based pandals in the city that have witnessed a staggering footfall during the Puja days is all slated to live a second life on Jagadhatri Puja at Chandannagore, Hooghly. All the four innovative themes churned out by artist Gouranga Kuila for Tridhara Akalbodhan, Mudiali Club, New Alipore Buroshibtala and Barisha Sarbojonin have bagged takers from four Jagadharti Puja committees at Chandannagore. “It is indeed a proud moment that the art décor at the pandals that have received so much appreciation will continue to attract Puja revellers during Jagadhatri puja as well. The sea of humanity that descended at the pandals right from the day of Chaturthi is the reward for the hard work that has been put in,” Kuila said. It may be mentioned that Tridhara Akalbodhan near Deshapriya Park had tried to revive the lost artisanal traditions of Bengal through theme — ‘Prakriti Ratan e Shajabo Jotone’ with an aim to acquaint generation Y with the of art of clay and jute works. The Mudiali Club has created a unique blend of dokra with Banglar Patachitra through its theme ‘Mayer Aanchal’. Tridhara pandal will be on display at Niyogibagan Puja, while Mudiali will be for Char Mandir Tala at Chandannagore. The Barisha Sarbojonin in Behala that drew attention by portraying the life of the Jarowa tribes of Andaman will live a second life at Chandnangaore’s Palpara. Buroshibtala which, through its theme Bangashur Badh, heralded a new morning free from communal tension at a time when there is fear of communal riots looming large in the country will again come alive at a pandal in Mankundu, Hooghly. Among the major crowd pullers in South, Kashi Bose Lane that based its theme on ‘Balcony’ will be on display at a Kali Puja in Kamarhati followed by Jagadhatri Puja at Chandannagore. Theme maker Sanatan Dinda said: “The greatest reward for an artist is to have appreciation from more and more people. It is an inspiration for an artist to work towards excellence.” A number of other Puja committees like Dum Dum Park Tarun Dal, Hindustan Park in Gariahat, Chakraberia Sarboninin in Bhowanipore are also in talks with Jagadhatri puja committees at Chandanngore.
Kolkata: An aircraft of Biman Bangladesh suffered a bird hit at Kolkata Airport while landing at Netaji Subhas Chandra Bose International (NSCBI) Airport on Monday morning. As no major damage could be traced, the flight took off for Dhaka around 12 pm.According to the sources, on Monday morning, around 10:30 am, an aircraft of Biman Bangladesh coming from Dhaka was about to land at NSCBI Airport. After the landing gear was opened, the pilot felt a hit below the front door of the aircraft. Immediately, the Air Traffic Control (ATC) Also Read – Rain batters Kolkata, cripples normal lifewas informed. Upon receiving the information, the ATC officials arranged for an immediate landing of the aircraft. Emergency measures were taken. Around 10:30 am the flight landed safely and the passengers were evacuated. There were 162 passengers and seven crew members on board. The aircraft was declared grounded immediately. Later, the engineers checked with the aircraft for damages. As no major damage could not be identified, the flight was given the clearance to take off. The aircraft then took off from Kolkata for Dhaka around 12 pm. Significantly, the number of bird hit incidents are increasing in Kolkata as garbage is being dumped in the adjacent areas. In several occasions, the Airport Authority met with the civic bodies requesting removal of garbage from the area. Though municipalities and corporation in the adjacent areas of NSCBI Airport strictly ordered residents not to dump garbage, no one bothers.