Bouncing water droplets reveal smallscale beauty w Video

first_imgA clip of a bouncing water droplet from the video below. Credit: Aria and Gharib. In the video below, scientists have captured the simple movements of water droplets on a superhydrophobic carbon nanotube surface. The video shows the water droplets as they bounce, slide, and roll across different structures made of the carbon nanotube arrays. The scientists, Adrianus Aria and Morteza Gharib from the California Institute of Technology, used a high-speed camera at different frame rates to capture the water droplets. The scientists controlled the exact size of the droplets with a syringe pump and released the droplets onto the surfaces using a flat-tipped needle. The droplets were illuminated from behind with a diffuse halogen light, demonstrating the artistic side of fluid dynamics. Water droplets bounce on superhydrophobic carbon nanotube arrays. Credit: Aria and Gharib. Droplets that Roll Uphill More information: via: “Bouncing Water Droplet on a Superhydrophobic Carbon Nanotube Array.” Adrianus I. Aria and Morteza Gharib. arXiv:1010.1351v1center_img 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 Citation: Bouncing water droplets reveal small-scale beauty (w/ Video) (2010, October 14) retrieved 18 August 2019 from https://phys.org/news/2010-10-droplets-reveal-small-scale-beauty-video.html © 2010 PhysOrg.comlast_img read more

Viking families traveled together research shows

first_img(Phys.org)—A new study shows that when Vikings moved to new territories, men and women traveled together. Erika Hagelberg of the University of Oslo and her colleagues compared ancient Norse and Icelandic mitochondrial DNA with mitochondrial DNA of modern Northwestern Europeans. They found similarities between the ancient and modern DNA suggesting women played a significant role in Viking migrations. The research appears in The Royal Society Philosophical Transactions B. Vikings traveled long distances, establishing colonies in Iceland and many parts of Northwestern Europe. They even traveled as far as North America. It’s a commonly held belief that Viking expeditions consisted entirely of men, and that a shortage of women at home compelled Viking men to seek out women in foreign lands. Earlier genetic studies have suggested that while Viking men ventured forth to pillage and plunder, women and children stayed home. Viking women did not rejoin their men until after the men had already settled in new territories. Hagelberg’s team wanted to gain a better understanding of the migration patterns of Viking women. To do this, they studied mitochondrial DNA. Carried in egg cytoplasm, mitochondrial DNA passes through the maternal line. The team examined mitochondrial DNA from the teeth and long bones of 45 skeletons of ancient Norwegians who lived between A.D. 796 and 1066. They found that it was similar to the previously analyzed mitochondrial DNA of ancient Icelanders.The researchers then compared the Norse and Icelandic mitochondrial DNA to the mitochondrial DNA of more than 5,000 modern people from the Scottish mainland, the Shetland and Orkney Islands, Norway, Sweden, England, Germany and France. They found that the ancient mitochondrial DNA closely resembled that of the modern Northwestern Europeans. Hagelberg and her colleagues discovered that the mitochondrial DNA from the Norse and Icelandic specimens most closely matched mitochondrial DNA of people from the Orkney and Shetland Islands, which are close to Scandinavia.The findings illustrate the path Viking women would have taken as they spread across northern Europe. Hagelberg and her team say their research indicates that Vikings traveled as families when colonizing new lands.Hagelberg’s team would like to obtain a better understanding of the relationships between the ancient Norse and other ancient peoples by studying ancient British DNA. Citation: Viking families traveled together, research shows (2014, December 9) retrieved 18 August 2019 from https://phys.org/news/2014-12-viking-families.html The “Lofotr” viking ship and the smaller “femkeiping”. Both recosntructions based on excavations from the Gokstad find. Credit: Geir Are Johansen/Wikipedia © 2014 Phys.org More information: Mitochondrial DNA variation in the Viking age population of Norway, Published 8 December 2014. DOI: 10.1098/rstb.2013.0384ABSTRACTThe medieval Norsemen or Vikings had an important biological and cultural impact on many parts of Europe through raids, colonization and trade, from about AD 793 to 1066. To help understand the genetic affinities of the ancient Norsemen, and their genetic contribution to the gene pool of other Europeans, we analysed DNA markers in Late Iron Age skeletal remains from Norway. DNA was extracted from 80 individuals, and mitochondrial DNA polymorphisms were detected by next-generation sequencing. The sequences of 45 ancient Norwegians were verified as genuine through the identification of damage patterns characteristic of ancient DNA. The ancient Norwegians were genetically similar to previously analysed ancient Icelanders, and to present-day Shetland and Orkney Islanders, Norwegians, Swedes, Scots, English, German and French. The Viking Age population had higher frequencies of K*, U*, V* and I* haplogroups than their modern counterparts, but a lower proportion of T* and H* haplogroups. Three individuals carried haplotypes that are rare in Norway today (U5b1b1, Hg A* and an uncommon variant of H*). Our combined analyses indicate that Norse women were important agents in the overseas expansion and settlement of the Vikings, and that women from the Orkneys and Western Isles contributed to the colonization of Iceland. The Viking journey of mice and men 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.last_img read more

Of heritage music and colours

first_imgIndian Council for Cultural Relation presented an art exhibition titled Heritage and Colour and Geet Ghazal cultural night under its Horizon series. Painting exhibition by artist Archana Gupta was inaugrated on Friday which was followed by a ghazal night by artist Sangeeta Arya and her group. The group from Jaipur came to the Capital for the show and wooed the hearts of audience. The exhibition is on display till 22 October.   The Horizon Series by ICCR has regular weekly performances by the artistes.last_img

Carcass meat row SIT formed to detect rackets root

first_imgKolkata: A Special Investigation Team (SIT) has been formed to reach the root of the racket that had been operating to sell meat of carcasses.The police have already arrested 10 persons in connection with the Budge Budge incident, in which two youths were initially caught chopping off meat from carcasses in a dumping ground. Subsequently, similar incidents also came to light in some other parts of the state.Sources said that the 10-member SIT is headed by a senior police officer of additional superintendent of police rank. The members of the SIT are taking all necessary steps to expedite the probe and to get hold of other people involved in the racket. Also Read – Heavy rain hits traffic, flightsThe police have conducted raids at different places including Narkeldanga, Tangra and Kasba in this connection, late on Saturday night. Sources said that the police had conducted the raids after receiving information about some people, who used to work as “linkmen” for the kingpins of the racket.The police have also come to know about the harmful chemicals that they used to use in the meat of carcasses, to give it a fresh look and sell it as packaged meat. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedThey are also trying to know about the departmental stores where such meat was supplied and whether the departmental stores’ authorities were aware at all that meat of carcasses were being supplied, after processing it using harmful chemicals. The Enforcement Branch is also looking into different aspects of the case.Sadhan Pandey, the state Consumer Affairs minister, attended a programme of Trinamool Congress in North Kolkata and created awareness among people in this connection. At the same time, he stated that officers of the legal metrology can take up the task of inspecting the quality of food if they are given the necessary power. It may be mentioned that soon after the Budge Budge incident, the matter related to sale of dead chicken came to light, when police conducted raid in a chicken farm at Rajarhat. Police came to know that the chicken farm was owned by one Kausar Ali Dhali, who is originally a resident of Basirhat in North 24-Parganas. The police have intensified the search for him. A senior police officer said that necessary steps are being taken to arrest Dhali and raids have also been conducted at different places. Local people in the area of his original residence said that they were unaware of Dhali’s activities.People have also become apprehensive to buy packaged meat and it has resulted in a drop in sales. People were also found avoiding eating chicken and meat from roadside eateries.last_img read more

SSC seeks green signal on list of candidates

first_imgKolkata: The School Service Commission (SSC) has written to State Election Commissioner A K Singh to give the nod for publishing the names of candidates who can be called for verification of their testimonials. “The Model Code of Conduct (MCC) is presently on with the state Election Commission (SEC) declaring the dates for the Panchayat elections. So, we have written to the Commissioner for permission, so that we can publish the names of candidates who will appear before us for verification of testimonials. This is an integral part of the recruitment process,” said a senior official of SSC. Also Read – Heavy rain hits traffic, flightsThe decision of the SSC comes in the wake of Calcutta High Court on Monday giving the nod for recruitment of upper primary teachers in government schools across the state. The court’s direction has made it clear that out of a vacancy of 15,000 teachers, 13,500 teachers can now be recruited in classes V to VIII in the state schools.SSC will conduct the screening process, but the appointment letter will be issued by the West Bengal Board of Secondary Education. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedAs per directions by Justice Tapabrata Chakraborty of Calcutta High Court, 10 percent of the seats will be reserved for para-teachers till the conclusion of the case. The next hearing has been scheduled in the month of July.It has been mentioned that some teachers’ organisations had moved the high court, challenging the 2009 notification of School Service Commission (SSC), that had reserved 10 percent of the seats for para-teachers.last_img read more

Its all in the cards

first_imgOxford Bookstore Connaught Place hosted a Book Reading and Tarot Workshop by Kiren Rai, author of The Sacred Indian Tarot. The evening included an Indian interpretation of the cards and a session of Tarot readings at the Oxford Bookstore on March 4.A beautiful, hand-drawn deck of Indian tarot cards, The Sacred Indian Tarot combines the classicism of the Tarot with the aesthetic richness of Indian mythology. The book contains twenty-two (Major Arcanas) unique hand-painted cards with images taken from a rich pantheon of Indian mythology.  Also Read – ‘Playing Jojo was emotionally exhausting’The cards of the Tarot consist of potent archetypes rooted in Medieval and Renaissance Europe. The symbols, forms and figures used to represent these archetypes have been taken from Indian epics and scriptures and are rooted in the tenets of Hindu cosmic principles giving it a truly unique Indian perspective. The Sacred Indian Tarot deck is truly a collector’s item which can be used to gain a refreshing insight into love and relationships, finances, career planning and much more. Also Read – Leslie doing new comedy special with NetflixKiren Rai has regularly used the Tarot as a tool for exploration ad divination and has done readings for a group of friends, who value her insights and look to her for a fresh understanding of situation. Fascinated by Tarot symbology, she has explored various decks and found esoteric similarities in the symbols used in all decks. This inspired her to put together an Indian deck of cards replacing the traditional Tarot archetypes with Indian images and symbols. While making the deck she has come to completion within herself and she believes that this mosaic of Indian cards, created by upcoming Indian artists should be shared by a broader swathe of people. She is a member of various online Tarot forums, blogs and communities. She enjoys discussing all aspects of the Tarot with a group of Tarot collectors, readers and enthusiasts worldwide and is a member of various other forums and communities involved with Tarot reading.last_img read more

Beyond celluloid

first_imgThe Rekha  Mody Habiart Foundation’s presents an anthology of Seema Kohli’s artistic films at the Hungarian Information and Cultural Center (HICC) with a theme Questioning Life and Beyond Through Films  on May 17 at 1 – A, Janpath in the Capital. Selja Kumari (Former Union minister and Rajya Sabha MP), in the presence of Chief Guest Anita Ratnam will do the honours of inauguration in the presence of the capital’s culturatti.The eight experiential video performances, include Unending Dance of Light- Raks E Shams, Is Death Possible, Parikrima, It was a Summer Afternoon, Oroborus, Cogito Ergo Sum, What were you thinking Anyways and Swayamsiddha – Myth, Mind and Movement. Also Read – ‘Playing Jojo was emotionally exhausting’Seema Kohli’s works reveals a claiming of feminine subjectivities, an altered concept of feminine sexuality. Her art practice involves various disciplines from drawing, painting, sculptures, installations and performance. The most significant one to emerge out of liner forms and paintings is ‘Performance Art’, Decay, hybridisation and transformation, creating new identity; reshaping belongings, intimacy, a dialogue of matter and memory – all these constitute the language of her work.  Also Read – Leslie doing new comedy special with NetflixSeema Kohli was a student of philosophy before she became a professional artist. She is still a philosopher and considers – through the medium of her art making – the deepest questions relating to life on our planet. Her central enquiry in this exhibition is into the nature of death whether it is a physical, psychological, para psychological, social or a spiritual phenomena, as well as the final moment most human beings fear. It is also about the various rituals that we conduct at the time of death as a preparation of the journey of the soul. Seema Kohli is a visual artist based in New Delhi. She studied philosophy at Delhi University and applied arts at South Delhi polytechnic.  She has received minimal formal training in fine arts and  is inspired particularly by the myriad traditions that fall under the umbrella term “Hinduism” but she absorbs readily from other sources too: (Buddhist, Sikh, Sufi, Ancient Greek traditions) making their ideas and stories her own. In her art practice as in her life, she is rigorously anti-dogmatic. Kohli sees herself primarily as a painter.last_img read more

184 districts identified for focussed healthcare PM

first_imgListing out achievements and strides made by India especially in maternal and child health, he exuded confidence that India would reach close to achieving the millennium development goal of reducing under-five mortality rate.Addressing an international conference on healthcare here, he said India had eliminated maternal and neonatal tetanus much before the global target date of December 2015 and that the country stands ready to help others in this area with technology and programme intervention. Also Read – Need to understand why law graduate’s natural choice is not legal profession: CJIIndia needs to institutionalise a system where marginalised communities receive universal healthcare and financial protection as “unfortunate health episodes” are making people financially weak, he said.”One of our major concerns is equity. As a step towards ensuring equitable health services across regions that suffer from intra-state disparities, and to bring about sharper improvements in health outcomes, a total of 184 poorest performing districts all over the country have been identified. Also Read – Health remains key challenge in India’s development: Kovind”Special efforts are being made to put in more resources and focused programmes in these areas,” he said here while addressing the ‘Global Call to Action’ Summit 2015 being attended by representatives of 24 nations.Modi also underlined his government’s commitment to ensuring that no child in India dies of a vaccine-preventable disease and said the largest immunisation drive another mission known as “Mission Indradhanush” has been launched.It seeks to accelerate the annual rate of immunisation from existing 1 per cent to more than 5 per cent per year so as to achieve more than 90 per cent coverage by 2020.  The Prime Minister said programmes like the National Health Mission have resulted in improved health outcomes and Janani Suraksha Yojana has ensured that 75 per cent of the deliveries takes place in health care centres.’The message is of our commitment, that we will ensure that every woman, every child who can be saved will be saved. We also need to make a clarion call to the world to join hands in taking such steps that would ensure this,’ he said.Extending India’s support to all the 24 participating countries in the summit including the SAARC nations, he said India’s “rich” experience in universal immunisation including ‘mission indradhanush‘ could be shared with them.”India stands committed to not only allocate resources towards this in our country but also to help the world and all those countries which needed any support. It is my personal vision and my government’s firm commitment,” he said.”We could train personnel and skill them for better management of child sickness in our Special Newborn Care Units (SNCUs) as well as share our experience at home based newborn care,” he said.He said he has witnessed people getting financially weak because of “unfortunate health episodes” and proposed to “institutionalise a system where marginalised communities receive universal health care and financial protection. We must experiment and learn from each other”.Noting that India’s under-5 mortality rate has reduced from 126 in 1990 to 49 against the global average of 46, he expressed confidence that “India is likely to reach close to achieving the MDG target if the current trend of annual decline is sustained”.He said the drop also reflected India’s achievement of under-5 mortality rate decline at an “accelerated pace” compared to the global rate of decline.Describing as “truly historic” India’s “victory” in eradication of polio, he said that from being a country accounting for more than a half of the global polio cases in 2009, to being declared free “reflects India’s deep commitment to child health”.”Last year, I had made a commitment of assisting the SAARC countries in keeping it polio free. We have also made a commitment to provide Pentavalent vaccines to such SAARC countries as would need it.”We will offer whatever experience we have to the world community. India would be happy to assist any country with technology, system strengthening and programme implementation capsules,” he said.Asserting that India’s “birth cohort” of 26 million is a formidable challenge, Modi said India’s commitment to succeed is also strong.last_img read more

State to take action against vehicle owners using auxiliary LED lights

first_imgKolkata: The state Transport department will take stern action against the owners of vehicles and motor cycles using dazzling lamps and high-powered lights illegally.Copies of the notification have been sent to all the District Magistrates, Superintendents of Police and Commissioners of Police.As per the CMV Rules 1989, no light in violation of specification can be used in any vehicle.In the recent times, owners of vehicles, particularly two wheelers are installing powerful LED head lamps and additional lights, which cause inconvenience to the drivers coming from the opposite direction. Some drivers even have the tendency to use high beam lights both on city roads and highways causing further inconvenience to the drivers of vehicles coming from the opposite direction. Also Read – Rain batters Kolkata, cripples normal lifeNowadays, motorcycle drivers are installing LED lights on the handle and leg guards. They often keep on the head light, along with the two additional lights, leaving the drivers of vehicles coming from the opposite direction confused.A senior official in the Public Vehicles department said earlier some drivers used to install fog lights that were used during winters.During other parts of the year, the fog lights used to remain covered. The fog lights were particularly used on the highways. He said some drivers have lodged complaint with the Transport department and police about the inconvenience they faced while driving because of irrational use of the dazzling lamps.Police will set up checking points both in Kolkata and the districts asking the users to remove them, else they will be fined.last_img read more

BP reading of 12080 still works for Indians

first_imgAt a time when researchers and health care providers globally are debating over an ideal blood pressure (BP) level for you —with changing lifestyles and stress being a major part of everyday life — the Indian health experts still vouch for the traditional 120/80 BP reading, even a tad lower —for all age groups.A significant research published in the journal Heart Asia this month had warned that the European and North American blood pressure guidelines – issued last year at 140/90 mmHg being the new normal – may actually increase the stroke risk if adapted for Asian patients, particularly the elderly. Also Read – ‘Playing Jojo was emotionally exhausting’“High blood pressure is a key risk factor for stroke, but the link between the two is much stronger in Asians than it is in Europeans or North Americans,” the authors wrote.“I agree that there has been a shift in the trend because of high sodium intake, lack of exercise, workplace stress and high levels of stress, but 120/80 is what one should aim to achieve,” says Dr Manoj Kumar, associate director (department of cardiology) at Max Hospital in the capital. Also Read – Leslie doing new comedy special with NetflixAccording to a recent World Health Statistics report, 23.10 per cent men and 22.60 per cent women above 25 years suffer from hypertension in India. When your heart beats, it contracts and pushes blood through the arteries to the rest of the body. This force creates pressure on the arteries and is called systolic blood pressure (top reading). A normal systolic BP reading is 120 or a bit less. The diastolic blood pressure number or the bottom number indicates the pressure in the arteries when the heart rests between beats. A normal diastolic blood pressure number is 80 or a bit less. “We currently recommend the western guidelines, specially JNC8, where 140/90 is the cut off value for diagnosing and initiating treatment of hypertension,” said Dr Neeraj Bhalla, director and senior consultant (cardiology) at BLK Superspecialty Hospitals.  The Eighth Joint National Committee (JNC8) in the US recently released evidence-based recommendations for the management of hypertension in adults. According to these, treatment should be initiated when blood pressure is 150/90 mmHg or higher in adults 60 years and older, or 140/90 mmHg or higher in adults younger than 60 years.“If the target blood pressure is not reached within one month after initiating therapy, the dosage of the initial medication should be increased, or a second medication should be added,” the guidelines add.Dr Bharat Kukreti, senior consultant (cardiology) at Paras Hospital in Gurgaon shared a recent case study of 26-year-old Sid who came to him with the complaint of headache and visual blurring. “When his BP was measured, it came 200/130. Medications were given on priority and he felt better. If timely action was not taken then he would have suffered from either brain hemorrhage or heart failure,” he said.Those with less than 140/90 or pre-hypertensive reading, should go for lifestyle modification. “We should take at least 30 grams of fibres daily and cholesterol intake should be less than 150 mg. Nearly 30-45 minutes of moderate intensity exercise for five days a week is a sure bonus,” Dr Bhalla points out.last_img read more