نتایج جستجو برای: ice

تعداد نتایج: 53535  

2007
Tsutomu YAMANOKUCHI Nobuhiro TOMIYAMA

This paper describes the research plan to use ALOS / PALSAR data for Antarctic ice sheet analysis. The final goal of our study is to extract the precise ice sheet elevation and estimate accurate position of grounding line using ALOS / PALSAR data. The authors have been studying the grounding line and ice sheet topography from InSAR data, which mainly used ERS-1/2 tandem data. We plan to adopt t...

Journal: :Science 2006
Eric Rignot Pannir Kanagaratnam

Using satellite radar interferometry observations of Greenland, we detected widespread glacier acceleration below 66 degrees north between 1996 and 2000, which rapidly expanded to 70 degrees north in 2005. Accelerated ice discharge in the west and particularly in the east doubled the ice sheet mass deficit in the last decade from 90 to 220 cubic kilometers per year. As more glaciers accelerate ...

Journal: :Science 2011
E Rignot J Mouginot B Scheuchl

We present a reference, comprehensive, high-resolution, digital mosaic of ice motion in Antarctica assembled from multiple satellite interferometric synthetic-aperture radar data acquired during the International Polar Year 2007 to 2009. The data reveal widespread, patterned, enhanced flow with tributary glaciers reaching hundreds to thousands of kilometers inland over the entire continent. Thi...

This study investigated the influence of nanoclay on the impact damage resistance of glass fiber-epoxy composites under high velocity ice impact loading. Addition of 0.5 wt. % nanoclay into epoxy was shown to improve damage resistance compared to composite plates having no nanoclay platelet. The glass fiber-epoxy composites containing nanoclay brought about substantial improvement in ice impact...

A. Fereidoon A. R. Sabet Sh. Dolati

The influence of nanoclay on the impact damage resistance of glass fiber–epoxy composites has been investigated using high-velocity repeated ice impact tests. The incorporation of nanoclay into epoxy enhances the impact resistance of the composites. The impact of ice is a realistic scenario for composite structures such as aircraft fuselages, wing skins and fan blades and it is not a completely...

Journal: :PLoS Biology 2005
Liza Gross

Citation: (2005) Correction: As the Antarctic ice pack recedes, a fragile ecosystem hangs in the balance. PLoS Biol 3(6): e224.

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2006
D J Wingham A Shepherd A Muir G J Marshall

The Antarctic contribution to sea-level rise has long been uncertain. While regional variability in ice dynamics has been revealed, a picture of mass changes throughout the continental ice sheet is lacking. Here, we use satellite radar altimetry to measure the elevation change of 72% of the grounded ice sheet during the period 1992-2003. Depending on the density of the snow giving rise to the o...

ژورنال: اعتیاد پژوهی 2009
ثنائی , باقر , لطفی, فرح , میرسلیمانی, لاله , وزیری, شهرام ,

THE HYPOTHESIS, This survey compares the sexual behavior, the high risk sexual behavior and self-harm behavior of narcotic substance users (opium, crack, and heroin) with stimulants substance uses (ice, cocaine). METHOD, This survey is comparative-causative post test. The sample consisted of 265 substance abusers as intact subjects from different camps in Tehran who filled he sexual behavior q...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
(pages 13-22) e. khanipour j. keramat s. h. hosseiniparvar a. motamedzadegan a. ghorbani s. a. shahidi

carotenoids are the main pigments of tomato, of which 93% is lycopene. lycopene has desirable physiological effects in human sush as cancer prevention. recent years, because of harmful side effects of synthetic colouring agents used in food products, employing of natural food colouring agents has become very important. in this research firstly, solvent extraction method was used for tomato caro...

2015
Gary A. Maykut

LONG TERM GOALS Our long term goal is a quantitative understanding of how the ocean and atmosphere interact in the presence of a sea ice cover, on both local and regional scales. Because the greatest uncertainties in this interaction involve the effects of shortwave radiation on the ice and upper ocean, research is focused on processes that control the vertical distribution, storage, and transp...

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