Results 21 to 30 of about 4,940,499 (251)

Characterization of active layer water contents in the McMurdo Sound region, Antarctica [PDF]

open access: yes, 2010
The liquid soil water contents in the seasonally thawed layer (active layer) were characterized from seven soil climate monitoring sites - four coastal sites from south to north (Minna Bluff, Scott Base, Marble Point and Granite Harbour), and inland ...
C.A. Seybold   +5 more
core   +1 more source

Tuning Technique for Active FSS Arrays [PDF]

open access: yes, 2009
A novel biasing technique is described for active frequency selective slot arrays. The bandpass response can be switched between transmitting and reflecting modes, or tuned over a predetermined frequency range using two different biasing circuit ...
Parker, Edward A.   +3 more
core   +1 more source

Characteristics of Freeze–Thaw Cycles in an Endorheic Basin on the Qinghai-Tibet Plateau Based on SBAS-InSAR Technology

open access: yesRemote Sensing, 2022
The freeze–thaw (F-T) cycle of the active layer (AL) causes the “frost heave and thaw settlement” deformation of the terrain surface. Accurately identifying its amplitude and time characteristics is important for climate, hydrology, and ecology research ...
Huayun Zhou   +14 more
doaj   +1 more source

Provision of quality of service for active services [PDF]

open access: yes, 2001
A novel approach to quality of service control in an active service network (application layer active network) is described. The approach makes use of a distributed genetic algorithm based on the unique methods that bacteria use to transfer and share ...
Marshall, Ian W.   +2 more
core   +1 more source

Single-Layer Bandpass Active Frequency Selective Surface [PDF]

open access: yes, 2008
A single-layer, bandpass, active FSS is presented. It shows good angle of incidence stability for TE incidence, at the operating frequency of 2.45 GHz. It is based on circular loop aperture with each unit cell having four PIN diodes.
Kenneth L. Ford   +17 more
core   +1 more source

Fluid Migration through Permafrost and the Pool of Greenhouse Gases in Frozen Soils of an Oil and Gas Field

open access: yesRemote Sensing, 2022
Most methane (CH4) and carbon dioxide (CO2) emissions originate from the biodegradation of organic matter of soils and of degrading permafrost in the Arctic.
Gleb Kraev   +6 more
doaj   +1 more source

High-resolution electrical resistivity tomography applied to patterned ground, Wedel Jarlsberg Land, south-west Spitsbergen [PDF]

open access: yesPolar Research, 2015
This article presents results of two-dimensional electrical resistivity tomography (ERT) applied to three types of patterned ground in Wedel-Jarlsberg Land (Svalbard), carried out in late July 2012. The structures investigated include sorted circles, non-
Marek Kasprzak
doaj   +1 more source

Active layer thickness observations

open access: yes, 2022
Dataset of  active layer thickness  (ALT) observations on the Qinghai Plateau. 
Yixin Xu (12581685)   +7 more
core   +1 more source

Recent Approaches to Controlling the Nanoscale Morphology of Polymer-Based Bulk-Heterojunction Solar Cells

open access: yesEnergies, 2013
The need for clean, inexpensive and renewable energy has increasingly turned research attention towards polymer photovoltaic cells. However, the performance efficiency of these devices is still low in comparison with silicon-based devices.
Abdulra'uf Lukman Bola   +3 more
doaj   +1 more source

Recent evolution of the active layer in the Morenas Coloradas rock glacier, Central Andes, Mendoza, Argentina and its relation with kinematics

open access: yesCuadernos de Investigación Geográfica, 2020
Between 2008 and 2016 the Morenas Coloradas rock glacier in the Central Andes of Mendoza showed different thermal characteristics at three monitoring sites in active layers, Balcón I (3560 m a.s.l.), Balcón I Superior (3590 m a.s.l.) and Balcón II (3770 ...
D. Trombotto-Liaudat, E. Bottegal
doaj   +1 more source

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