Light from smartphones may lessen your sleep quality

Agencies
July 30, 2017

Houston, Jul 29: Artificial light emitted from digital devices such smartphones and tablets could reduce the quality of your sleep, a study has warned.

The largest source of blue light is sunlight, but it is also found in most LED-based devices. Blue light boosts alertness and regulates our internal body clock, or circadian rhythm, that tells our bodies when to sleep.

This artificial light activates photoreceptors called intrinsically photosensitive retinal ganglion cells (ipRGCs), which suppresses melatonin, the hormone that signals your body that it is time to sleep.

"The most important takeaway is that blue light at night time really does decrease sleep quality. Sleep is very important for the regeneration of many functions in our body," said Lisa Ostrin, assistant professor at University of Houston in the US.

In the study, participants, aged between 17 and 42, wore short wavelength-blocking glasses three hours before bedtime for two weeks, while still performing their nightly digital routine.

Results showed about a 58 per cent increase in their night time melatonin levels.

"Those levels are even higher than increases from over- the-counter melatonin supplements," said Ostrin, who led the study published in Ophthalmic & Physiological Optics.

Wearing activity and sleep monitors 24 hours a day, the 22 study participants also reported sleeping better, falling asleep faster, and even increased their sleep duration by 24 minutes a night, according to Ostrin.

Ostrin recommends limiting screen time, applying screen filters, wearing computer glasses that block blue light, or use anti-reflective lenses to offset the effects of artificial light at nighttime.

Some devices even include night mode settings that limit blue light exposure.

"By using blue blocking glasses we are decreasing input to the photoreceptors, so we can improve sleep and still continue to use our devices.

That is nice, because we can still be productive at night," Ostrin added.

 

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News Network
February 9,2020

Panaji, Feb 9: RSS general secretary Suresh Bhaiyyaji Joshi on Saturday said that anybody who wants to work (in India) will have to do so with the Hindu community and for their empowerment.

Addressing a lecture on the topic "Vishwaguru Bharat, an RSS perspective" at Dona Paula in Panaji, Mr Joshi referred to his communication with an intellectual who had said that India should become a "supre-rashtra" in the year 2020.

"Anybody who wants to work (in India) will have to work with the Hindu commumnity by taking them along and for their empowerment. Hindus have witnessed the rise and fall of India since the time immemorial. India cannot be separated from (the) Hindu (community). Hindus have always been at the centre of this nation," Mr Joshi said in Marathi.

He also added that since Hindus are not communal or antagonist, "nobody should be reluctant to work for the Hindu community".

The RSS leader further said, "The world says India will become a superpower in 2020, but I remember my conversation with an intellectual who had said that India should become a super-rashtra (super nation) in 2020".

Goa Chief Minister Pramod Sawant was among those who attended the lecture.

"To create awareness and unity amongst Hindus does not amount to (taking) an action against others (community). No one should feel it that way. We can say with utter self confidence before the entire world that Hindus becoming strong won't result in destructive activities, but (such proposition) will work for the society and humanity," he added.

Invoking history, Mr Joshi said Hindus never invaded other countries. "Whatever wars (they had fought) were for self defence. Everyone has the right to self defence," he said.

"It is India's duty to teach the world to walk on the path of ''samanvay'' (coordination). Nobody else other than India and Hindus can do this," Mr Joshi said.

He said some communities in the world keep preaching that only their path is "great".

"But we are from the (Hindu) community which says that we have our own path so as you. When the world will accept this ideology, then all the issues would get solved. It is the duty of India to take the world on that path," he added.

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May 18,2020

New Delhi, May 18: Very severe cyclonic storm ‘Amphan’, over central parts of South Bay of Bengal, has intensified into extremely severe cyclonic storm, the India Meteorological Department (IMD) said on Monday. The weather department has warned that ‘Amphan’ may turn into a “super cyclonic storm’.

According to experts, North Odisha coast will face the maximum impact of cyclone Amphan when it makes landfall.

“Wind speed expected to be 110-120 kmph, gusting up to 130 kmph. Balasore, Bhadrak, Jajpur, Mayurbhanj dist can be affected on 20 May (when it makes landfall), IMD Bhubaneswar scientist Umashankar Das told news agency ANI.

The IMD has said that ‘Amphan’ will cross West Bengal - Bangladesh coasts between Digha (WB) and Hatiya island - in the afternoon/evening of May 20 as very severe cyclonic storm.

Earlier, the IMD had warned that ‘Amphan’, over central parts of South Bay of Bengal, will intensify into an extremely severe cyclonic storm on Monday.

“Very Severe Cyclonic Storm (VSCS) ‘AMPHAN’ over central parts of South Bay of Bengal near latitude 12.5°N and longitude 86.4°E, about 870 km nearly south of Paradip (Odisha). To intensify further into an Extremely Severe Cyclonic Storm (ESCS) in the next six hours,” the IMD said in a tweet on Monday.

National Disaster Response Force (NDRF) has sent its 10 teams to Odisha and seven teams to West Bengal in view of the approaching Cyclone Amphan, news agency reported.

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Agencies
July 24,2020

Colorado, Jul 24: A new study has found that physical stress in one's job may be associated with faster brain ageing and poorer memory.

Aga Burzynska, an assistant professor in the Department of Human Development and Family Studies, and her research team connected occupational survey responses with brain-imaging data from 99 cognitively normal older adults, age 60 to 79. They found that those who reported high levels of physical stress in their most recent job had smaller volumes in the hippocampus and performed poorer on memory tasks. The hippocampus is the part of the brain that is critical for memory and is affected in both normal ageing and in dementia.

Their findings were published this summer in Frontiers in Human Neuroscience under the research topic 'Work and Brain Health Across the Lifespan.'

"We know that stress can accelerate physical ageing and is the risk factor for many chronic illnesses," Burzynska said. "But this is the first evidence that occupational stress can accelerate brain and cognitive ageing."

She added that it is important to understand how occupational exposures affect the ageing of our brains.

"An average American worker spends more than eight hours at work per weekday, and most people remain in the workforce for over 40 years," Burzynska said. "By pure volume, occupational exposures outweigh the time we spend on leisure social, cognitive and physical activities, which protect our ageing minds and brains."

Physical demands at work

Burzynska explained that the association between "physical stress" and brain/memory were driven by physical demands at work. These included excessive reaching, or lifting boxes onto shelves, not necessarily aerobic activity. This is important because earlier work by Burzynska and her colleagues showed that leisure aerobic exercise is beneficial for brain health and cognition, from children to very old adults. Therefore, the researchers controlled for the effects of leisure physical activity and exercise.

As expected, leisure physical activity was associated with greater hippocampal volume, but the negative association with physical demands at work persisted.

"This finding suggests that physical demands at work may have parallel yet opposing associations with brain health," Burzynska explained. "Most interventions for postponing cognitive decline focus on leisure, not on your job. It's kind of unknown territory, but maybe future research can help us make some tweaks to our work environment for long-term cognitive health."

She added that the results could have important implications for society.

"Caring for people with cognitive impairment is so costly, on economic, emotional and societal levels," Burzynska said. "If we can support brain health earlier, in middle-aged workers, it could have an enormous impact."

The researchers considered and corrected for several other factors that could be related to work environment, memory and hippocampus, such as age, gender, brain size, educational level, job title, years in the occupation and general psychological stress.

One piece of the puzzle

"The research on this topic is so fragmented," Burzynska said. "One previous study linked mid-life managerial experience with greater hippocampus volume in older age. Another showed that taxi drivers had larger hippocampi than a city's bus drivers, presumably due to the need to navigate. In our study, job complexity and psychological stress at work were not related to hippocampal volume and cognition. Clearly, our study is just one piece of the puzzle, and further research is needed."

The magnetic resonance imaging (MRI) data used for the study was collected at the University of Illinois Urbana-Champaign between 2011 and 2014.

CSU researchers now can collect MRI data with the new 3T scanner at the University's Translational Medicine Institute.

With this new capability, Burzynska, along with Michael Thomas and Lorann Stallones of CSU's Department of Psychology, is launching a new project, "Impact of Occupational Exposures and Hazards on Brain and Cognitive Health Among Aging Agricultural Workers," which will involve collecting MRI brain scans and identifying risk and protective factors that could help the agricultural community age successfully. The project recently obtained funding as an Emerging Issues Short-Term Project from the High Plains Intermountain Center for Agricultural Health and Safety.

The Department of Human Development and Family Studies is part of CSU's College of Health and Human Sciences.

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