Knowledge Update

​New York, Dec 6 (IANS) Famine may have a lasting impact on the male descendants of its victims, suggests new research focused on survivors of a mass famine that took place in the early 1920s in several rural regions of Russia.

The findings suggest that periods of fasting or starvation may significantly shorten the lifespans of both children and their male descendants.

"A variety of experimental and epidemiological studies have tried to propose that intermittent or periodic fasting, like caloric restriction, may slow the aging process and extend lifespans," said lead researcher Eugene Kobyliansky, Professor at Sackler School of Medicine, Tel Aviv University in Israel.

"But there is also evidence demonstrating that even moderate caloric restriction may not extend but, on the contrary, can shorten the human lifespan," Kobyliansky said.

Past research suggests a strong correlation between telomere dynamics and the processes that determine human ageing and lifespan. 

Telomeres, compound structures at the end of each chromosome that protects the end of the chromosome from deterioration, are the genetic key to longevity. They shorten with every chromosome replication cycle.

The team evaluated telomere lengths in a population-based sample comprised of survivors of the mass famine of the early 1920s and in the survivors' descendants, who originated from Chuvashia, a rural area in the mid-Volga region of Russia. 

In Chuvashia, the proportion of starving inhabitants reached 90 per cent in late March 1922, and mortality among starving peasants reached between 30-50 per cent. The situation only began to improve in April 1923. By the end of that year, the mass famine in Chuvashia was considered over.

The researchers found that here were shorter leukocyte telomeres in men born after 1923 after the mass famine ended than in men born before 1922.

There was a stable inheritance of shorter telomeres by men born in ensuing generations, the findings showed. 

But there was an absence of any correlation between shorter telomeres and women born before or after the event, said the study published in The American Journal of Clinical Nutrition.

New York, Dec 6 (IANS) Pre-school children's skills in patterning, comparing quantities and counting objects were stronger predictors of their math achievement in fifth grade than other skills, researchers said.

The study showed that pre-school math skills supported first-grade math skills, which in turn supported fifth-grade math knowledge. 

By first grade, patterning remained important and understanding written numbers and calculating emerged as important predictors of later achievement.

But, because not all types of math knowledge were equally important, certain early math topics should get more attention than they currently do, the researchers said.

"Counting, calculating, and understanding written numbers already get a lot of attention from teachers and parents, for good reasons," said lead author Bethany Rittle-Johnson, Professor at Vanderbilt University in Tennessee, US. 

"However, comparing quantities may merit more attention in pre-school and patterning knowledge may merit more attention in both pre-school and the early elementary grades," Rittle-Johnson added.

The findings suggest that educators and school administrators may want to consider carefully which areas of math study should they shift attention to as they develop curricula for the early years.

For the study, the team followed 517 low-income children aged between 4-11.

Determining how to help children achieve in math is important, particularly for children from low-income families who often enter school with weaker math knowledge than their peers, the researchers suggested. 

The study appeared in the journal Child Development.

​San Francisco, Dec 21 (IANS) After successfully rolling out the live video feature, Facebook has now introduced "Live Audio" option - like traditional radio or podcasting -- in your News Feed where users will be able to broadcast audio directly to the social network.

​New York, Dec 13 (IANS) In a move aimed at doing away with the rigid touch most robots are associated with, researchers have devised a way for a soft robot to feel its surroundings internally, in much the same way humans do.

​London, Dec 5 (IANS) Eating at least 20 gram of nuts a day -- equivalent to a handful -- can reduce the risk of a wide range of diseases including heart disease and cancer, new research has found. Handful of nuts daily can cut people's risk of coronary heart disease by nearly 30 per cent, their risk of cancer by 15 per cent, and their risk of premature death by 22 per cent, the study said. The study included all kinds of tree nuts, such as hazel nuts and walnuts, and also peanuts -- which are actually legumes. The results - published in the journal BMC Medicine - were in general similar whether total nut intake, tree nuts or peanuts were analysed. What makes nuts so potentially beneficial is their nutritional value, said study co-author Dagfinn Aune from Imperial College London. "Nuts and peanuts are high in fibre, magnesium, and polyunsaturated fats -- nutrients that are beneficial for cutting cardiovascular disease risk and which can reduce cholesterol levels," Aune said. "Some nuts, particularly walnuts and pecan nuts are also high in antioxidants, which can fight oxidative stress and possibly reduce cancer risk," Aune explained. The research team analysed 29 published studies from around the world that involved up to 819,000 participants, including more than 12,000 cases of coronary heart disease, 9,000 cases of stroke, 18,000 cases of cardiovascular disease and cancer, and more than 85,000 deaths. While there was some variation between the populations that were studied, such as between men and women, people living in different regions, or people with different risk factors, the researchers found that nut consumption was associated with a reduction in disease risk across most of them. "Even though nuts are quite high in fat, they are also high in fibre and protein, and there is some evidence that suggests nuts might actually reduce your risk of obesity over time," Aune said. The study also found that if people consumed on average more than 20 gram of nuts per day, there was little evidence of further improvement in health outcomes.

​Rabat, Dec 5 (IANS/MAP) Moroccos net international reserves amounted to MAD 250.2 billion (around $24 billion) until November 25, 2016, recording a 13.5 per cent increase on an annual basis, Al-Maghrib Bank said.

Colombo, Dec 5 (IANS) Russia on Monday said it will increase trade and economic ties with Sri Lanka as the two countries celebrate 60 years of diplomatic relations.

Russia's Ambassador to Sri Lanka Alexander Karchava said that Colombo and Moscow have set up a joint committee on trade and economy and science and technology and the

​New York, Dec 6 (IANS) In an effort to stop the proliferation of fake news, Facebook has initiated a "Survey" that asks users to what extent they think an article uses misleading language.

​Dubai, Dec 5 (IANS/WAM) The UAE on Monday highlighted its efforts on biodiversity protection at the 13th meeting of the Conference of the Parties to the Convention on Biological Diversity.

A delegation from the UAE is participating in the meeting in Cancun, Mexico, which is aimed at the conservation of biological diversity, the sustainable use of the components of biological diversity and the fair and equitable sharing of the benefits arising out of the utilisation of genetic resources.

Khalfan Al Suwaidi, Deputy Executive Director of Terrestrial and Marine Biodiversity Sector, who is representing the UAE, said: "The preservation of natural life and its development are top priorities in the UAE and considered as the cornerstones of the country's policy in the field of environmental conservation and development."

Quoting President Sheikh Khalifa bin Zayed Al Nahyan regarding the nation's environment conservation strategy, Al Suwaidi said: "Since its inception, the UAE has been keeping the balance between economic and social development and the preservation of the country's cultural, social and environmental heritage."

"The country has been taking a number of measures, as well as developing relevant laws and legislation regulating professional fishing to preserve, develop and ensure the sustainability of fish stocks," he added.

Toronto, Dec 5 (IANS) Is the very idea of exam giving you stress and negative moods? Take heart, a new study suggests that the occasional bout of bad feelings can actually improve a student's academic performance.

The findings showed that students who were mostly happy during their four years of university but who also experienced occasional negative moods had the highest grade per annum (GPA) at the time of graduation.

In contrast, students who experienced high levels of negative moods and low levels of positive moods often ended up with the lowest GPAs -- a pattern consistent with depressive disorders.

"Students often report feeling overwhelmed and experiencing high levels of anxiety and depressive symptoms. The study shows that we need to teach them strategies to both manage negative emotions and stress in productive ways and to maintain positive emotional experiences," said Erin Barker, Professor at Concordia University in Quebec, Canada.

For the study, Barker and her team worked with 187 first-year university students. They looked at the students' response patterns to better understand how experiences of positive and negative emotions occurred over time.

The study also demonstrated that both negative and positive emotions play a role in our successes.

"We often think that feeling bad is bad for us. But if you're generally a happy person, negative emotions can be motivating. They can signal to you that there is a challenge that you need to face. Happy people usually have coping resources and support that they draw on to meet that challenge," Barker said, in the study published in the journal Developmental Psychology.