منابع مشابه
Structural Dislocations in Anthracite
C nanomaterials promise to find many applications in areas that include electronics, photonics, energy, and sensing. Graphene occupies an important position in this emerging area. In view of our interest in the synthesis of soluble carbon nanotubes 7 and graphene, we have investigated routes to other soluble materials that have a high carbon content. Anthracite is of interest in this regard, as...
متن کاملCalving rates at tidewater glaciers vary strongly with ocean temperature
Rates of ice mass loss at the calving margins of tidewater glaciers (frontal ablation rates) are a key uncertainty in sea level rise projections. Measurements are difficult because mass lost is replaced by ice flow at variable rates, and frontal ablation incorporates sub-aerial calving, and submarine melt and calving. Here we derive frontal ablation rates for three dynamically contrasting glaci...
متن کاملAmodel for tidewater glacier undercutting by submarine melting
Dynamic change at the marine-terminating margins of the Greenland Ice Sheet may be initiated by the ocean, particularly where subglacial runoff drives vigorous ice-marginal plumes and rapid submarine melting. Here we model submarine melt-driven undercutting of tidewater glacier termini, simulating a process which is key to understanding ice-ocean coupling. Where runoff emerges from broad subgla...
متن کاملCharacteristics of Pore Structure and Fractal Dimension of Isometamorphic Anthracite
The geologic conditions of No. 3 coal seams are similar to Sihe and Zhaozhuang Collieries, however, the gas production is significantly different. To better understand the effect of pores, by means of experimental measurements and quantitative analysis, the pore properties of high-rank isometamorphic anthracite were thoroughly studied. Our study showed that the pore structures were predominantl...
متن کاملSpinal Stenosis - Chiropractic Articles - Spine Care of Tidewater, P.C
Patients with lumbar spinal stenosis—one of the most common reasons for spinal surgery in older people—are commonly recognized by a bent-forward, shuffling posture and a characteristic small-step gait. Stenosis surgery, however, is a major procedure that is recommended only when conservative methods of care aren’t effective—or when stenosis is caused by such things as tumors or accompanied by i...
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ژورنال
عنوان ژورنال: The ANNALS of the American Academy of Political and Social Science
سال: 1908
ISSN: 0002-7162,1552-3349
DOI: 10.1177/000271620803100109