Results 271 to 280 of about 2,231,763 (313)

Changing Concentrations of Older Americans

Geographical Review, 1978
The spatial distribution of persons aged 65 and older in the United States is examined for 1950 and 1970. A descriptive analysis is undertaken of maps depicting the county concentration of elderly people relative to total country population. The national pattern of local concentration is found to vary considerably between the two time periods.
Thomas O. Graff, Robert F. Wiseman
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Profit, entry and changes in concentration

International Journal of Industrial Organization, 1993
Abstract The simultaneity between profit, entry, and changes in concentration is examined. The sample includes 481 observations on 4-digit industries over the years 1972–1977 and 1977–1982. Results show that profits respond positively to entry barriers and initial concentration. Net entry responds positively to initial profits and responds negatively
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Recent Changes in the Concentration of Manufacturing

Annals of the Association of American Geographers, 1945
The expansion of manufacturing facilities in the United States between 1939 and 1945 focused attention upon an activty which has had generally minor attention in geographic literature. In view of the absolute and relative importance of manufacturing as a livelihood, the number and distribution of wage jobs in industry become of particular interest to ...
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A Low‐Concentration Electrolyte for High‐Voltage Lithium‐Metal Batteries: Fluorinated Solvation Shell and Low Salt Concentration Effect

Angewandte Chemie - International Edition, 2022
Rongyu Deng, Fulu Chu, Feixiang Wu
exaly  

Changes in concentrations of methylglyoxal,

Research in Experimental Medicine, 1996
M. Kawase, M. Tada, S. Akagi, S. Ohmori
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The Changing Face of Concentrated Poverty [PDF]

, 2005
Recent research by Jargowsky (2003) highlights dramatic changes in the spatial distribution of concentrated poverty throughout the metropolitan U.S. during the 1990s. Yet the traditional definition of concentrated poverty – 40 percent of the tract population living below the federal poverty threshold – remains problematic in light of burgeoning ...
Jennifer Wolch, Nathan J. Sessoms
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Li+ concentration waves in a liquid electrolyte of Li-ion batteries with porous graphite-based electrodes

Energy Storage Materials, 2022
Dmitri L Danilov, Rüdiger-A Eichel, Peter H L Notten   +2 more
exaly  

Limiting concentration during batch electrodialysis process for concentrating high salinity solutions: A theoretical and experimental study

Desalination, 2021
Muxing Zhang, Shifang Huang
exaly  

Product Differentiation, Concentration, and Changes in Concentration

The Review of Economics and Statistics, 1978
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Non-Diffusional Concentration Changes

1981
In this chapter we lump together the really quite uncomplicated complications of homogeneous chemical reaction kinetics and convective transport. There is nothing conceptually difficult with kinetics; the only problems encountered are due to reactions proceeding too fast or, in multi-step reactions, having to account for a number of reaction species ...
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