Results 261 to 270 of about 706,826 (277)

Two decades of active layer thickness monitoring in northeastern Asia

Polar Geography, 2019
This study summarizes seasonal thawing data collected in different permafrost regions of northeast Asia over the 1995–2018 period. Empirical observations were undertaken under the Circumpolar Active Layer Monitoring (CALM) program at a range of sites across the permafrost landscapes of the Yana-Indigirka and Kolyma lowlands and the Chukotka Peninsula ...
Abramov, Andrey, Davydov, Sergey, Ivashchenko, Andrey, Karelin, Dmitry, Kholodov, Alexandr, Kraev, Gleb, Lupachev, Alexey, Maslakov, Alexey, Ostroumov, Vladimir, Rivkina, Elizaveta, Shmelev, Denis, Sorokovikov, Victor, Tregubov, Oleg, Veremeeva, Alexandra, Zamolodchikov, Dmitry, Zimov, Sergey   +15 more
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Effects of Active layer thickness on optical properties of polymer OLEDs

Materials Today: Proceedings, 2019
Abstract We have proposed and described precisely remarkable improvements of emitted power and corresponding optical parameters of Indium Tin Oxide (ITO)/Emissive Layer (EL)/Electron Transport Layer (ETL)/Aluminum based Organic Light Emitting Diode (OLED). Changing EL thickness we perceived the emitted power, although maximum emissive power (18.4 mW/
Dileep Kumar, T.D. Das
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Optimization of the CuPc active layer thickness of static induction transistors

TENCON 2003. Conference on Convergent Technologies for Asia-Pacific Region, 2004
Static induction transistors find application in various organic devices owing to their low voltage and high current operation. Devices with layered structure consisting of Au(drain)/CuPc/Al(gate)/CuPc/ITO(source)/glass have been prepared. We report the static characteristics of devices with different edge features for the Al gate electrode.
C.M. Joseph, M. Nakamura, M. Iizuka, K. Kudo   +3 more
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Thick Active Layers of Electrochemically Modified Glassy Carbon. Electrochemical Impedance Studies

Journal of The Electrochemical Society, 2000
Glassy carbon electrodes were electrochemically modified by an anodization/cathodization procedure in aqueous . Depending on the anodization time, the active‐layer thickness could be controlled from less than a micrometer to nearly 100 μm. Electrochemical impedance measurements indicated that the capacitance per unit volume of the active layer was ...
Melani G. Sullivan, Rüdiger Kötz, Otto Haas   +2 more
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Altitude Trends in Permafrost Active Layer Thickness, Kluane Lake, Y.T.

ARCTIC, 1987
On the northwest-facing slopes of Outpost Mountain, Kluane Lake, the permafrost active layer shows an anomalous relationship with altitude, being thinner (typically 40 cm) between 823 and 910 m altitude than above or below this belt. Maximum thicknesses (about 90 cm) are encountered in the shrub tundra at 1310 m elevation.
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Recent changes in the active layer thickness across the northern hemisphere

Environmental Earth Sciences, 2016
To better understand the ecological and hydrological responses to climatic and cryospheric changes, the spatiotemporal variations in the active layer thickness (ALT) need to be scrupulously studied. Based on more than 230 sites from the circumpolar active layer monitoring network, the spatiotemporal characteristics of the ALT across the northern ...
Dongliang Luo, Qingbai Wu, Huijun Jin, Sergey S. Marchenko, Lanzhi Lü, Siru Gao   +5 more
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Non-destructive measurement of active-layer thickness of LR 115 SSNTD

Radiation Measurements, 2004
Abstract LR 115 is a solid-state nuclear track detector (SSNTD) based on cellulose nitrate and has been commonly used for measurements of concentrations of radon gas and/or radon progeny. These measurements depend critically on the removed thickness of the active layer during etching.
F.M.F. Ng, C.W.Y. Yip, J.P.Y. Ho, D. Nikezic, K.N. Yu   +4 more
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Winter streamflow, ground temperature and active‐layer thickness in Northeast China

Permafrost and Periglacial Processes, 2003
AbstractSeasonal freezing and thawing influence the hydrological regimes of winter streamflow in northeast China where abrupt increases of 1.3° C and 2.8° C in the annual and winter air temperatures have occurred since the 1990s. Correlation between winter discharge and soil freezing is based upon hydrometeorological and geocryological data for the ...
Jingshi Liu, Norio Hayakawa, Mingjiao Lu, Shuhua Dong, Jinying Yuan   +4 more
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Effect of thickness of ZnO active layer on ZnO-TFT's characteristics

Thin Solid Films, 2008
Abstract We have investigated the electrical characteristics of ZnO thin film transistors with respect to the thickness of ZnO active layers. The ZnO layers with the thickness of 30 nm to 150 nm were deposited on bottom gate patterned Si substrate by RF sputtering at room temperature. The low-temperature oxide served as gate dielectric.
J.H. Chung, J.Y. Lee, H.S. Kim, N.W. Jang, J.H. Kim   +4 more
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Optimal thickness of the active layer in a heterojunction laser

Soviet Journal of Quantum Electronics, 1971
Optimization of a symmetrical heterostructure is considered and the minimal value of the threshold current of a heterojunction laser at 300°K is calculated. It is shown that in the case of linear or superlinear (but weaker than quadratic) dependence of the optical gain on the current, the optimal thickness of the active layer d0 can be deduced from a ...
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