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9,657
Brain magnetic resonance imaging with contrast dependent on blood oxygenation.
- Proc. Natl. Acad. Sci. USA
, 1990
"... ABSTRACT Paramagnetic deoxyhemoglobin in venous blood is a naturally occurring contrast agent for magnetic resonance imaging (MRI). By accentuating the effects of this agent through the use of gradient-echo techniques in high fields, we demonstrate in vivo images of brain microvasculature with imag ..."
Abstract
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Cited by 648 (1 self)
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to localized spectroscopy (2) and chemical shift imaging (3) that are applicable to many chemical species, MRI of water protons has been functionally extended to NMR angiography (4), perfusion imaging It has previously been demonstrated (8, 9) that the presence of deoxyhemoglobin in blood changes the proton
TURFGRASS SELECTION AND MANAGEMENT TO ACHIEVE MAXIMUM WATER CONSERVATION
"... Water conservation is receiving a great deal of attention in national and regional publications, and rightly so. A dimension ofwater usage that has been receiving particular attention involves water inputs into urban landscapes. One of the reasons for this is that it is a highly visible activity in ..."
Abstract
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Cited by 1 (0 self)
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Water conservation is receiving a great deal of attention in national and regional publications, and rightly so. A dimension ofwater usage that has been receiving particular attention involves water inputs into urban landscapes. One of the reasons for this is that it is a highly visible activity
Iterative Water-filling for Gaussian Vector Multiple Access Channels
- IEEE TRANSACTIONS ON INFORMATION THEORY
, 2001
"... This paper characterizes the capacity region of a Gaussian multiple access channel with vector inputs and a vector output with or without intersymbol interference. The problem of finding the optimal input distribution is shown to be a convex programming problem, and an efficient numerical algorithm ..."
Abstract
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Cited by 313 (12 self)
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is developed to evaluate the optimal transmit spectrum under the maximum sum data rate criterion. The numerical algorithm has an iterative water-filling int#j pret#4968 . It converges from any starting point and it reaches with in s per output dimension per transmission from the K-user multiple access sum
Natural Variability in Annual Maximum Water Level and Outflow of Yellowstone Lake
, 1940
"... The water level in Yellowstone Lake varies each year in response to differences in the winter’s snowpack accumulation, spring precipitation, and air temperatures. Restriction at the outlet of Yellowstone Lake retards the outflow, and water backs up in the lake during periods of high inflows. The U.S ..."
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The water level in Yellowstone Lake varies each year in response to differences in the winter’s snowpack accumulation, spring precipitation, and air temperatures. Restriction at the outlet of Yellowstone Lake retards the outflow, and water backs up in the lake during periods of high inflows. The U
Stream shading, summer streamflow and maximum water temperature following intense wildfire in headwater streams. In
- Department of Agriculture, Forest Service, Pacific Southwest Researce Station
, 1989
"... Abstract: Adjacent headwater streams were monitored for postfire shade, summer streamflow and maximum water temperature following the 40,000 ha Silver Complex fire in southern Oregon. Average postfire shade (30 percent) for the three streams was considerably less than prefire shade (est.>90 perce ..."
Abstract
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Cited by 12 (0 self)
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Abstract: Adjacent headwater streams were monitored for postfire shade, summer streamflow and maximum water temperature following the 40,000 ha Silver Complex fire in southern Oregon. Average postfire shade (30 percent) for the three streams was considerably less than prefire shade (est.>90
SYSTEMATIC DESIGN OF A MAXIMUM WATER RECOVERY NETWORK FOR AN URBAN SYSTEM BASED ON PINCH ANALYSIS
"... Water demands are growing every year as the result of the booming world population. A population report on environment and water issues had estimated that more than 2.8 billion people in 48 countries will lack access to adequate water supplies by ..."
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Water demands are growing every year as the result of the booming world population. A population report on environment and water issues had estimated that more than 2.8 billion people in 48 countries will lack access to adequate water supplies by
Maximum Weekly Maximum
"... shown these water bodies have exceeded the WQO for pathogens. Monte Rio area from the confluence of Dutch Bill Creek to the confluence of Fife creek. Also Healdsburg Memorial Beach from the Highway 101 crossing to the railroad crossing upstream of the beach. Gualala River Temperature/Aquatic Life Wa ..."
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shown these water bodies have exceeded the WQO for pathogens. Monte Rio area from the confluence of Dutch Bill Creek to the confluence of Fife creek. Also Healdsburg Memorial Beach from the Highway 101 crossing to the railroad crossing upstream of the beach. Gualala River Temperature/Aquatic Life
Evaluation of transpiration in a Douglas-fir stand by means of sap flow measurements
- Tree Physiology
, 1987
"... Transpiration of a Douglas-fir (Pseudorsuga menziesii (Mirb.) France) stand was evaluated by sap flow measurements during a 4-month period. Between-tree variation in sap flow depended on crown class. On a sunny day, total transpiration was 1.6, 8.0 and 22.0 liters day- ’ for suppressed, codomi-nant ..."
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Cited by 162 (3 self)
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-nant and dominant trees, respectively. Transpiration estimated by sap How fell below potential evapotranspiration when available soil water decreased below 30 % of its maximum value. Sap How measurements gave transpiration values similar to those obtained by the water balance method.
Results 1 - 10
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9,657
