Knowledge Update

Beijing, Feb 26 (IANS) China's top legislature on Friday passed the country's first law on deep seafloor resource exploration to protect the maritime environment and ensure sustainable exploitation.

​New York, Feb 27 (IANS) US stocks traded narrowly mixed as the country's economic growth was revised up to one percent in the fourth quarter of 2015.
By Friday noon, the Dow Jones Industrial Average edged down 0.89 point, or 0.01 percent, to 16,696.40, Xinhua news agency reported. The S&P 500 rose 3.19 points, or 0.16

Skyline University College,UAE Technology is the moving force, and it's impacting every dimension of human life. New technological developments create new opportunities for various businesses, and at the same time make many others obsolete. The latter half of twentieth century changed the way world shops, distantly located small independent stores gave way to shopping malls and hypermarkets. Shopping malls became the indispensable part of modern lifestyle. Modern consumers got inspiration for emerging fashion in shopping malls and they spent hours every week in these malls to shop, to see and to make new friends. Malls had a lot to offer for evenings and weekends from fashion to food courts, from child entertainment to mega theaters. Malls became the major factor for an area to develop, for flats in an apartment to get sold at the right prices. New residents based their house selection decisions not only on the availability of schools and hospitals but also on the malls in nearby areas. Shopping malls grew so fast in the last few decades that retailers operating at independent locations began moving to these malls for survival and growth. The number and types of shopping malls often decided how modern a city was. City with sprawling malls became shopping destinations and added to the tourism and overall economic growth of the cities. Different malls were known for different types of retail stores, different types of merchandise they offered, different type of customers they attracted. No wonder, governments and decision makers awarded high priority to malls' development in urban planning. But, there are strong signals of changing wind. Probably, malls are entering the proverbial maturity phase of product lifecycle. The convenience of online shopping and the poverty of time are propelling shoppers away from the malls and towards the screen. The rapidly developing technologies are making the screen smaller, smarter and faster. The trend has become global, the death of High Street in UK and that of downtown in USA is not confined to America and Europe. Even in Asian countries, malls are vacant: some malls have no shoppers, and others do not have even occupants (retail stores).While Flipkart and snapdeal have made Indian malls empty, Alibaba in China has made hundreds of international brands shutting down their stores in Beijing, Shanghai and other cities. Korea has the same story. In UAE, world famous malls of Dubai are facing the intense heat of competition and owners of physical stores have a lot of apprehensions about the future. What are the prominent reasons of this shift? And how will it unfold further in future? A lot of studies have been done and many others are in the progress to understand the dynamics and to infer the future trends. A few of the major reasons identified are as following:- Shopping by smartphones and apps have provide far more wider choices than shopping in physical stores Comparisons of products, features and prices are so instant and professional, which can never be matched by physical stores Changing lifestyle factors like both partners working and poverty of time make online shopping Hobson's choice for millions Disintermediation (absence of marketing middlemen like retailers & distributors) bring down the prices substantially, Privacy in shopping, avoidance of crowd etc. are other factors which motivate many to shop online. The future seems to be in favor of online shopping and it may bring more bad news to physical stores and malls. There are obvious reasons for this conjecture. First of all, the emergence of better technologies like augmented reality will make online shopping far more better and convenient than today. Secondly, the smarter logistics will reduce the time for delivery in any part of the world. Thirdly, expansion and betterment of online payments will help online shopping to grow further .Last but not the least, newer generations will not have any psychological barrier to shop online, no old habits need to be broken, and they will be much more comfortable in using IT apps than older ones present today. Hence, writing on the wall for retailers and mall owners is act before it's too late, explore the new ways for businesses, new ways to reaching the changing customers. ​

​New York, Feb 27 (IANS) Nearly 108 million people in the world - one out of every 90 of the world population -- are suffering from correctable vision impairment, a global study has estimated.
Uncorrected refractive error (URE) - nearsightedness, farsightedness, and other focusing problems correctable by prescription lenses - is responsible for moderate to severe vision impairment in 101 million people and blindness in seven million people worldwide, the study said.The findings appeared in Optometry and Vision Science, official journal of the American Academy of Optometry. "Uncorrected refractive error continues as the leading cause of vision impairment and the second leading cause of blindness worldwide," said one of the study authors Kovin Naidoo from Brien Holden Vision Institute, Durban, South Africa.
Refractive error refers to any of the common vision problems causing decreased sharpness of vision, including myopia (nearsightedness), hyperopia, (farsightedness), or astigmatism. In developed countries, eyeglasses or contact lenses are routinely prescribed to correct these causes of impaired vision.But millions of people around the world still have impaired vision or even blindness caused by URE. In the study, a group of leading optometrists and ophthalmologists specialising in world blindness analysed the best available research on URE. Pooled data from nearly 250 studies performed between 1990 and 2010 were analysed to estimate the number of people affected by blindness and visual impairment due to URE, including trends in prevalence and differences by region.Uncorrected refractive error was found to be the leading cause of moderate to severe visual impairment, affecting an estimated 101.2 million people.It was also the second leading cause of blindness (after cataracts), affecting another 6.8 million. 
"In 2010, URE contributed 20.9 percent of all blindness and 52.9 percent of all moderate to severe vision impairment," Naidoo said

London, Feb 27 (IANS) If you are obese, you are at risk of physical and psychological health problems such as diabetes, heart disease, depression and anxiety.
But, your high body mass index (BMI) is also likely to affect your episodic memory -- the ability to recall past events, warns a new study.A higher BMI was previously found to affect the structural and functional changes in the brain. But, it may also be accompanied by a reduced ability to form and/or retrieve episodic memories and also affect brain's ability to perform certain cognitive tasks optimally, suggested the researchers.The results showed that obesity might also impair an individual's ability to use memory to help regulate consumption. 
In other words, it is possible that becoming overweight may make it harder for an individual to keep track of what and how much he or she has eaten, potentially making one more likely to overeat."The possibility that there may be episodic memory deficits in overweight individuals is of concern, especially given the growing evidence that episodic memory may have a considerable influence on feeding behaviour and appetite regulation," said Lucy Cheke, lecturer at the University.However, she cautioned that not all overweight people are necessarily forgetful.But if the results are generalised to memory in everyday life, then it could be that overweight people are less able to vividly relive details of past events -- such as their past meals, the researchers explained in the study published in The Quarterly Journal of Experimental Psychology.
Obesity has been previously, linked with dysfunction of the hippocampus, an area of the brain involved in memory and learning, and of the frontal lobe, the part of the brain involved in decision-making, problem solving and emotions.Around 60 percent of adults in Britain are overweight or obese: this number is predicted to rise to approximately 70 percent by 2034, the researchers noted. "Understanding what drives our consumption and how we instinctively regulate our eating behaviour is becoming more and more important given the rise of obesity in society," Cheke added. 
The researchers tested 50 participants aged 18-35, with body mass indexes (BMIs) ranging from 18 through to 51 -- a BMI of 18-25 is considered healthy, 25-30 overweight, and over 30 obese. The participants took part in a memory test known as the 'Treasure-Hunt Task', where they were asked to hide items around complex scenes (for example, a desert with palm trees) across two 'days'.They were then asked to remember which items they had hidden, where they had hidden them, and when they were hidden.
Overall, the team found an association between higher BMI and poor performance on the tasks.​

Keep your mind active to keep Alzheimer's at bay

Toronto, Feb 25 (IANS) Just as most therapies have a dose-response relationship whereby benefits diminish at high doses and the risk of adverse events increases, high level of intense exercise may also be bad for the heart, suggests a new study.

The researchers reviewed studies that looked into the relationship between exercise and heart problems and found that there is growing evidence that high levels of intense exercise may be cardiotoxic and promote permanent structural changes in the heart.

There is already fairly compelling evidence supporting the association between long-term sports practice and increased prevalence of atrial fibrillation -- abnormal heart rhythm characterised by rapid and irregular beating.

"Much of the discussion regarding the relative risks and benefits of long-term endurance sports training is hijacked by definitive media-grabbing statements, which has fuelled an environment in which one may be criticized for even questioning the benefits of exercise," explained study author Andre La Gerche from the Baker IDI Heart and Diabetes Institute, Melbourne, Australia. 

"This paper discusses the often questionable, incomplete, and controversial science behind the emerging concern that high levels of intense exercise may be associated with some adverse health effects," La Gerche noted.

The study was published in the Canadian Journal of Cardiology.

"The answers regarding the healthfulness of 'extreme' exercise are not complete and there are valid questions being raised," La Gerche said. 

"Given that this is a concern that affects such a large proportion of society, it is something that deserves investment. The lack of large prospective studies of persons engaged in high-volume and high-intensity exercise represents the biggest deficiency in the literature to date, and, although such work presents a logistical and financial challenge, many questions will remain controversies until such data emege," La Gerche observed.​

​New York, Feb 25 (IANS) While high salt intake has been known to cause high blood pressure and other side effects, researchers have now found that a high-salt diet might also contribute to liver damage in adults and developing embryos.
"This study demonstrates that high salt exposure in mice (four percent sodium chloride or NaCl in drinking water) and chick embryo could lead to derangement of the hepatic cords and liver fibrosis,” the researchers said.Fibrosis is the first stage of liver scarring.The findings by Xuesong Yang from Jinan University, Guangzhou, China, and colleagues were published in the Journal of Agricultural and Food Chemistry.Our bodies need a small amount of salt -- the US government recommends one teaspoon per day if you are a healthy adult.
Among other functions, the sodium ions from the savoury mineral help regulate water movement within the body and conduct nerve impulses.But too much of salt can be dangerous and in this study the researchers wanted to explore its potential effect at a cellular level.The researchers gave adult mice a high-salt diet and exposed chick embryos to a briny environment. Excessive sodium was associated with a number of changes in the animals' livers, including oddly shaped cells, an increase in cell death and a decrease in cell proliferation, which can contribute to the development of fibrosis. 
"The pathological mechanism may be the result from an imbalance between oxidative stress and the antioxidant system," the researchers explained.
On a positive note, the researchers found that treating damaged cells with vitamin C appeared to partially counter the ill effects of excess salt.​

​Washington, Feb 25 (IANS) Inspired by a desert beetle, cactus and pitcher plant, researchers from Harvard University have designed a new material to collect water droplets from thin air that can one day help fill the drying reservoirs on our planet.

The team from the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) and the Wyss Institute for Biologically Inspired Engineering drew inspiration from these organisms to develop a better way to promote and transport condensed water droplets.

“Our research shows that a complex bio-inspired approach, in which we marry multiple biological species to come up with non-trivial designs for highly efficient materials with unprecedented properties, is a new, promising direction in biomimetics,” explained Joanna Aizenberg, the Amy Smith Berylson professor of materials science at SEAS.

Organisms such as cacti and desert beetles can survive in arid environments because they have evolved mechanisms to collect water from thin air. 

The Namib desert beetle, for example, collects water droplets on the bumps of its shell while V-shaped cactus spines guide droplets to the plant's body.

The new system, described in the journal Nature, is inspired by the bumpy shell of desert beetles, the asymmetric structure of cactus spines and slippery surfaces of pitcher plants. 

The material harnesses the power of these natural systems, plus Slippery Liquid-Infused Porous Surfaces technology (SLIPS) developed in Aizenberg's lab, to collect and direct the flow of condensed water droplets.

This approach is promising not only for harvesting water but also for industrial heat exchangers.

Thermal power plants, for example, rely on condensers to quickly convert steam to liquid water.

“This design could help speed up that process and even allow for operation at a higher temperature, significantly improving the overall energy efficiency,” added Philseok Kim, vice president of technology at SEAS spin-off SLIPS Technologies, Inc.

The major challenges in harvesting atmospheric water are controlling the size of the droplets, speed in which they form and the direction in which they flow.

“This research is an exciting first step towards developing a passive system that can efficiently collect water and guide it to a reservoir,” Kim noted.​

​New York, Feb 24 (IANS) The world's 33 major deltas are sinking and the vast majority of those have experienced flooding in recent years, primarily as a result of human activity, says a new study.
Some 500 million people live on river deltas around the world, a number that continues to climb as the population increases, the study pointed out.
"These deltas are starved of the sediments they need for stability because of upstream dams that trap the material," said researcher James Syvitski, professor in geological sciences at the University of Colorado Boulder in the US.
"We are seeing coastal erosion increasing in many places across the planet," Syvitski noted.
Human effects on river deltas range from engineering tributaries and river channels, extracting groundwater and fossil fuels, trapping sediments behind dams, reducing peak flows of rivers and varied agricultural practices, he said.The findings were presented at the 2016 Ocean Sciences meeting held in New Orleans, US.River deltas are land areas created by sediment that collects at the mouths of rivers as they enter slow moving or standing water like oceans and estuaries. 
"Deltas are sinking at a much greater rate than sea levels are rising," Syvitski said.
The findings are based on international Community Surface Dynamics Modeling System (CSDMS) - global, interdisciplinary programme involving hundreds of researchers and students in 500 institutes in 68 countries.
For the study, the researchers looked into the degradation of major river deltas in the world, from Yellow River in China to the Mississippi River in Louisiana, US.The two major river deltas in the United States are the Mississippi River Delta in Louisiana and the Sacramento-San Joaquin River Delta in California. 
While the Sacramento-Joaquin Delta has significant issues with agricultural, industrial and urban pollution and subsidence, things are more dire in the Mississippi River Delta, where a football field-sized chunk of wetlands disappears every hour, Syvitski said. 
There are more than 40,000 dams 20 feet or higher on the Mississippi River system, he noted.​