Month:

August 2019

Capillary condensation technology produces drinkable water from diesel exhaust

first_imgResearchers have developed a method for capturing drinkable water from the diesel exhaust of Humvees and other machines. Image credit: U.S. Marine Corps photo by Cpl Stephen M. Kwietniak. More information: Cosmic Log and The Register As hydrocarbon fuels such as diesel burn, they get oxidized, producing carbon dioxide and water. The water comes out of the engine as hot steam in the exhaust, and needs to be condensed into water to be used. As the ORNL researchers have demonstrated, they can condense this steam into water using capillary condensation. In contrast to thermodynamic condensation, which condenses steam into water by cooling it, capillary condensation relies on capillary action in the micropores of hollow pipes. As the exhaust runs through these microporous pipes, it condenses into water in the micropores, and is then drawn off outside the pipe to allow more steam to condense. At the same time, the pores act as a filter by continuously displacing the water. As a result, the condensed water does not have enough time to absorb water-soluble contaminants, leaving clean, drinkable water. Unlike thermodynamic condensation methods, capillary condensation requires no cooling or energy, and is also a lot less bulky.Using the new capillary condensation technique, one gallon of diesel fuel can theoretically produce one gallon of water, according to ORNL project leader Melanie Debusk. Although not all of the water is recoverable, the researcher’s system can recover about 65-85% of it. Since a Humvee has a 25-gallon tank, it could provide enough water for about three soldiers per tank of fuel burned.As noted in a news article at The Register, a similar technique has recently been investigated for recovering water from the flue gas at coal-fired power plants. Another application might be to control the buoyancy in zeppelins and other airships, which get lighter as they burn fuel. If some of the exhaust could be converted into water, it could decrease the buoyancy and make it easier to land. The researchers at ORNL hope to achieve full-scale development of the new system for the military within the next few years, which has a budget of about $6 million. 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. Army looks to hydrogen to lighten soldiers’ load Citation: Capillary condensation technology produces drinkable water from diesel exhaust (2011, April 19) retrieved 18 August 2019 from https://phys.org/news/2011-04-capillary-condensation-technology-drinkable-diesel.html (PhysOrg.com) — Every person in the US military needs about 7 gallons of water per day for drinking, cooking, and cleaning. Supplying and transporting all that water takes a great deal of time and effort that might otherwise be used for other purposes. To address this problem, researchers at the Department of Energy’s Oak Ridge National Laboratory (ORNL) are developing a technology that harvests water from the combusted diesel fuel that is used to power tanks, Humvees, generators and other machines. © 2010 PhysOrg.comlast_img read more

A possible explanation for why no intermediate sized black holes have been

center_img Rare galaxy with 2 black holes has 1 starved of stars 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: A possible explanation for why no intermediate sized black holes have been found (2017, June 27) retrieved 18 August 2019 from https://phys.org/news/2017-06-explanation-intermediate-sized-black-holes.html Despite their popularity both in real science and science fiction, the concept of a black hole has only been around for a hundred years, as predicted by Albert Einstein. The term itself did not come into use until 1967, and it was just 46 years ago that the first one was identified. Physicists have learned much about black holes, though, particularly over the past several decades, but one glaring mystery remains—why have scientists never been able to spot one in the intermediate size range? Many large and small ones have been found, but none in the middle. In their paper, Alexander and Bar-Or suggest that our inability to find mid-sized black holes does not mean they do not exist—we just might have to look for them in other places.The researchers suggest that there may be fewer, or even no intermediate black holes today because of the way they grow—prior research has indicated that they likely get bigger as they “eat” stars. If so, they contend, then their calculations show black holes growing at a rate of one solar mass per 10,000 years. That means, they note, that if a black hole was born soon after the universe came into existence approximately 13.8 billion years ago (which is believed to be the case for large black holes), a black hole would have grown well past the intermediate stage by now. They also suggest that if intermediate-sized black holes do exist, they might reside in dense parts of the sky, which would make them very hard to spot. But such problems might be overcome soon, they note, as new technology has begun detecting gravitational waves.last_img read more

Evidence of dogs accompanying humans to Europe during Neolithic

first_img More information: Morgane Ollivier et al. Dogs accompanied humans during the Neolithic expansion into Europe, Biology Letters (2018). DOI: 10.1098/rsbl.2018.0286AbstractNear Eastern Neolithic farmers introduced several species of domestic plants and animals as they dispersed into Europe. Dogs were the only domestic species present in both Europe and the Near East prior to the Neolithic. Here, we assessed whether early Near Eastern dogs possessed a unique mitochondrial lineage that differentiated them from Mesolithic European populations. We then analysed mitochondrial DNA sequences from 99 ancient European and Near Eastern dogs spanning the Upper Palaeolithic to the Bronze Age to assess if incoming farmers brought Near Eastern dogs with them, or instead primarily adopted indigenous European dogs after they arrived. Our results show that European pre-Neolithic dogs all possessed the mitochondrial haplogroup C, and that the Neolithic and Post-Neolithic dogs associated with farmers from Southeastern Europe mainly possessed haplogroup D. Thus, the appearance of haplogroup D most probably resulted from the dissemination of dogs from the Near East into Europe. In Western and Northern Europe, the turnover is incomplete and haplogroup C persists well into the Chalcolithic at least. These results suggest that dogs were an integral component of the Neolithic farming package and a mitochondrial lineage associated with the Near East was introduced into Europe alongside pigs, cows, sheep and goats. It got diluted into the native dog population when reaching the Western and Northern margins of Europe. Journal information: Biology Letters Prior research has shown that dogs were living in both the Near East and Europe prior to the Neolithic. They were, in fact, the only domesticated species already present in Europe when the Near Easterners arrived. Now, the researchers in this new effort have found evidence of dogs traveling with people as they moved from the Near East to Europe and subsequently mated with the dogs already living there.To learn more about the history of dog domestication, the researchers studied 100 mitochondrial sequences obtained from ancient dog remains found in both the Near East and Europe. They used the genetic information they found to trace the lineage of dogs from the Upper Paleolithic to the Bronze Age.Prior research has also shown that farming began in the Middle East in an area known as the Fertile Crescent. Some of the people of that time stopped being hunter-gatherers and started domesticating animals and growing their own food. Approximately 9,000 years ago, some of those farmers from the Near East began migrating to Europe and Asia, bringing with them samples of crops they wanted to grow such as wheat and barley—and they also brought a host of domesticated animals such as sheep, goats and dogs.The researchers were able to trace the path of dogs migrating into southeastern parts of Europe along with their human companions. Once there, the evidence showed, the dogs began mixing with local dog populations. They suggest that such evidence shows that dogs were an integral part of the farmer-dog partnership during the earliest stages of agricultural development—likely serving as herding assistants. The researchers note that they also found that the European dog lineage was heavily diluted even before Near East dogs made their way into Western and Northern Europe. Credit: CC0 Public Domain New twist in tale of dogs’ origins Explore furthercenter_img A team of researchers from across Europe and Israel has found evidence of dogs traveling with people from the Near East to Europe during the Neolithic. In their paper published in the journal Biology Letters, the group describes their genetic study of dogs living in ancient Europe and the Near East and what they found. © 2018 Phys.org 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: Evidence of dogs accompanying humans to Europe during Neolithic (2018, October 17) retrieved 18 August 2019 from https://phys.org/news/2018-10-evidence-dogs-accompanying-humans-europe.htmllast_img read more

Juhi visits school for Chalk n Duster shoot

first_imgActor Juhi Chawla says she had a ‘lovely time’ shooting in a school for her upcoming film Chalk n Duster.The Gulaab Gang actor, who was in an Aurangabad school, took to Twitter to share the news.“Fun day at the school shoot for Chalk N Duster… Had a lovely time chatting with the school kids in Aurangabad…,” the 47-year-old actor tweeted along with a picture.This film is all about teacher and student’s communication. It highlights the problem they face and shows how the teaching way in the education system is changing day by day.Shabana Azmi, Zarina Wahab, Girish Kannad and Divya Dutta are playing the lead roles besides Juhi. The film is directed by Jayant Gilatar.last_img read more

Family alleges negligence of city hospital behind minors death

first_imgKolkata: Family members of a 7-year-old girl who died at a superspeciality child hospital in New Town on Monday, staged a protest demonstration inside the hospital campus.The victim, Shayesha Banerjee (7), was a resident of Siliguri who had been brought to the city hospital on Saturday, after she complained of fever and nausea. She was initially admitted to a hospital in Siliguri. As her condition deteriorated, the child was shifted to the city. Also Read – Rain batters Kolkata, cripples normal lifeThe family members of the child alleged that the private hospital authorities in New Town started treatment of the patient on mere suspicion that she might have caught dengue. They also alleged that dengue treatment was started on the patient without carrying out a proper test. The victim’s family members were told by the hospital on Sunday evening that the girl needed blood transfusion on immediate basis. Later in the evening, the hospital authorities allegedly told the family members that the hospital would arrange blood and they can go home. Shayesha’s father went to the hospital on early Monday morning, when he saw no blood transfusion had been done on the patient. It was also alleged that there was no doctor in the hospital to look after the girl, who died at around 4.30 am on Monday.last_img read more

Tollywood actor fiance beaten up by intoxicated miscreants

first_imgKolkata: A Tollywood actor was allegedly molested and beaten up by some miscreants on late Saturday night at Mukundapur.According to the actor, her fiance was also beaten up badly by the drunken miscreants as he protested and tried to stop them from molesting her.Sources informed that on Saturday night the actor was going to a relative’s house at Mukundapur along with others including her would-be-husband in a car.As none of them could recognise the house, they stopped to locate if they were on the right track. While checking the navigation the headlight of the car was kept on. Also Read – Rain batters Kolkata, cripples normal lifeAccording to the complaint filed, some persons were consuming alcohol in the area. One of them came near their car and ordered the actor to turn of the headlight as they were getting disturbed.He also used expletives while talking to the actor and her friends.When the actor and her fiance refused to do so, he threatened them with dire consequences.Despite repeated threats, the actor protested and asked the drunken man to leave.Within a few minutes, he called up his associates and they all gathered around the car. They hurled expletives at the actor. When the actor and her husband again protested, the miscreants started beating her up. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedWhen her fiance tried to stop them, he was also beaten up sustaining multiple injuries.The victims also alleged that amidst the scuffle some miscreant took away one of the mobile phones they had.Later, the actor and his friends went to Purba Jadavpur Police Station and lodged a complaint. Upon receiving the complaint, police initiated an FIR on charges of molestation, assault, theft and other offences.Police sources informed that after a night long search, cops apprehended a person identified as Bitu Sardar, who was allegedly involved in the incident.He is being interrogated to find the other accused persons.last_img read more

Fire breaks out inside KLC no one injured

first_imgKolkata: Fire broke out at a construction site located at Kochpukur in Kolkata Leather Complex (KLC) area late on Sunday night. Three fire tenders doused the fire within an hour. No one was injured in the incident.According to sources, at around 2:50 am on Sunday night, fire broke out at the temporary bamboo structure inside the construction premises of a private company. The said structure was used as a hut for labourers engaged in the construction work. Also Read – Bose & Gandhi: More similar than apart, says Sugata BoseSome labourers from other huts saw the fire and alerted the occupants of the incident. Immediately, the structure was evacuated and labourers started pouring water on the hut to douse the fire. But that did not help much as the fire was spreading fast due to strong winds. The fire brigade and KLC police station were informed. Soon, three fire tenders reached the spot and started spraying water. At around 4 am, the fire was controlled. Due to quick action by the firefighters, it could not spread to other parts of the construction site despite the strong winds. However, the hut was almost burnt down to ashes. Also Read – Rs 13,000 crore investment to provide 2 lakh jobs: MamataLater, firefighters found out an LPG cylinder which was still leaking. Immediately, necessary action was taken to stop the gas leak. According to firefighters, the fire could have taken a devastating shape if the LPG cylinder had burst. Firefigh-ters made sure that no other external cause was behind the fire. Question arose as to why the LPG cylinder was kept close to the labourers’ hut as it could have exploded, leading to a much worse disaster.last_img read more

Short film for community can get you UNESCO mentorship

first_imgCEMCA has partnered with UNESCO for the 5th Edition of Community Radio Video Challenge (CRVC) which will be based on the theme of “Women Empowerment”. Entries will be invited from students below 26 years from all disciplines from across the country. CEMCA has been conducting this competition for the last five years with an objective of connecting the youth to the great potential of Community Radio as a tool for community development and empowerment. In this competition, students can come up with films of 3 to 5 minute duration on the given theme which connects to “Community Radios”. This year, the competition has been thrown open from October 15 onwards and the last date for submission is January 15, 2018. The maximum entry from an institution should not be more than two. Also Read – Add new books to your shelfStudents will be expected to make short films on sub-themes like ‘Community Radio as a means to strengthen women leadership’, ‘women in business’, ‘women’s role in health and nutrition’, ‘women against domestic violence’, etc. A panel of distinguished jury of filmmakers and developmental communication experts will come together to choose the prize winners. The films will be screened in UNESCO on the occasion of World Radio Day and International Women’s Day where the winners will be felicitated. The prize winners – which will include first, second, third prizes and five special recognition awards – will be given mentorship on filmmaking for developmental communication by experts identified by UNESCO, besides cash prizes from CEMCA.last_img read more