۲۸ مهر ۱۴۰۱

The new observational technologies of ICESat-2

“The new observational technologies of ICESat-2 — a top recommendation of the scientific community in NASA’s first Earth science decadal survey — will advance our knowledge of how the ice sheets of Greenland and Antarctica contribute to sea level rise,” said Michael Freilich, from NASA’s Science Mission Directorate in the US.NASA is set to launch the most advanced laser instrument of its kind into space next month, to measure the changes in the heights of Earth’s polar ice in unprecedented detail.

“That meant we had to engineer a satellite instrument that not only will collect incredibly precise data, but also will collect more than 250 times as many height measurements as its predecessor. Its Advanced Topographic Laser Altimeter System (ATLAS) measures height by timing how long it takes individual light photons to travel from the spacecraft to Earth and back.ICESat-2 — which is scheduled to be launched on September 12 — represents a major technological leap in our ability to measure changes in ice height. The roundtrip of individual laser photons from ICESat-2 to Earth’s surface and back is timed to the billionth of a second to precisely measure elevation. Beyond the poles, ICESat-2 will measure the height of ocean and land surfaces, including forests. Researchers also will investigate the height data collected on ocean waves, reservoir levels, and urban areas.As it circles Earth from pole to pole, ICESat-2 will measure ice heights along the same path in the polar regions four times a year, providing seasonal and annual monitoring of ice elevation changes.

”ATLAS will fire 10,000 times each second, sending hundreds of trillions of photons to the ground in six beams of green light.“ATLAS required us to develop new technologies to get the measurements needed by scientists to advance the research,” said Doug McLennan, ICESat-2 project manager at NASA’s China Linen Fabrics Factory Goddard Space Flight Center.“Because ICESat-2 will provide measurements of unprecedented precision with global coverage, it will yield not only new insight into the polar regions but also unanticipated findings across the globe,” said Thorsten Markus, an ICESat-2 project scientist at Goddard. end-of Tags: nasa, earth, space.The Ice, Cloud and land Elevation Satellite-2 (ICESat-2) will measure the average annual elevation change of land ice covering Greenland and Antarctica to within the width of a pencil, capturing 60,000 measurements every second.ATLAS is designed to measure both the tops of trees and the ground below, which — combined with existing datasets on forest extent — will help researchers estimate the amount of carbon stored in the world’s forests

 

۲۱ مهر ۱۴۰۱

Most obviously, it can melt when exposed to heat

Most obviously, it can melt when exposed to heat.The researchers wanted to determine if they could slow down melting and extend the shelf life of ice cream using a fibrous extract from banana fruit stems, or rachis. end-of Tags: food and drink, desserts, ice cream, world cuisine, personal services, nec, american chemical society, university of guelph in canada, analytical tools, universidad pontificia bolivariana in colombia, robin zuluaga gallego, food scientists, university of guelph, food, universidad pontificia bolivariana, environment.The research was presented at the National Meeting & Exposition of the American Chemical Society (ACS).

They also determined that CNFs could increase shelf life of ice cream, or at least decrease its sensitivity to temperature changes that occur when moved to and from the freezer.Working in collaboration with researchers at the University of Guelph in Canada, the team extracted cellulose nanofibrils (CNFs), which are thousands of times smaller than the width of a human hair, from ground-up banana rachis.Despite its popularity, ice cream does have some drawbacks that food scientists have struggled to overcome. As a result, CNFs could potentially replace some of the fats -and perhaps reduce calories - in these desserts."Our findings suggest that cellulose nano-fibres extracted from banana waste could help improve ice cream in several ways," said Robin Zuluaga Gallego from the Universidad Pontificia Bolivariana in Colombia.

"As a result, this would allow for a more relaxing and enjoyable experience with the food, especially in warm weather," said Gallego.In addition, CNFs increased the visغير مجاز مي باشدity of low-fat ice cream, which improved the creaminess and texture of the product.They found that ice creams mixed with CNFs tended China Professional Wholesale Printing Velvet Fabrics Factory to melt much more slowly than traditional ice creams.Adding tiny fibres extracted from banana plant to ice cream could slow melting, increase shelf life and potentially replace fats used to make the tasty treat, scientists say.They mixed the CNFs into ice cream at varying concentrations, ranging from zero up to three-tenths of a gramme per 100 grammes of the dessert."In particular, the fibres could lead to the development of a thicker and more palatable dessert, which would take longer to melt.The study suggests that CNFs could help stabilise the fat structure in ice creams.Using a variety of analytical tools - including a rheometer, which measures how much force is needed to move a fluid, as well as a texturometer, which measures the hardness of ice cream - the researchers evaluated the effects that CNFs had on the popular frozen treat

 

۶ مهر ۱۴۰۱

Bangladesh Commerce ministry had reportedly expressed its confidence

Bangladesh Commerce ministry had reportedly expressed its confidence to export billion worth of apparel to India in the next two years on the back of duty-free access market and rising Wholesale Holland Printing Velvet Fabrics Manufacturers demand for garment items at competitive prices. We have asked the ministry to do something about this logistics issue," said Sanjay Jain, Chairman, Confederation of Indian Textile Industry..

Once March data comes in, the imports are likely to further go up.Apparel exports by the country were down 3. More worrying is the fact that our textile production is coming down while apparel imports are going up.Despite being a neighbour, time factor is a main impediment in the fabric trade between India and Bangladesh. The Chinese goods, on the other hand, reach faster through the sea route. "It takes almost a month for Indian fabric to travel by land from Surat to Bangladesh apparel units as it gets struck at the border for around 15 days, waiting for clearance.

However, as per the data available for the 11-month period till February 2019, apparel imports were 32 per cent higher compared to the previous fiscal.Further, Chinese fabric is competitive in terms of غير مجاز مي باشدt compared to Indian fabric. Duty free imports from Bangladesh have been worrying the industry.42 per cent in FY19. Bangladesh is buying fabric from China to make apparels and sending it to India,' said Chandrima Chatterjee, Adviser, Apparel Export Promotion Council. This is affecting the entire value chain. Under the free trade agreement with Bangladesh, the country has been increasingly exporting to India."Bangladesh is mainly responsible for the increase in imports. Between April and February, the country imported ,019 million worth apparels against 3 million in FY18.68 million and between July and December 2018 it was up 143 per cent and had already touched 0 million.Chennai: Despite being a fairly large player in the apparel trade, India's imports of apparels grew more than 30 per cent in FY19 while the exports continued to decline. In fiscal 2017-18, garment exports to India more than doubled to 8