scholarly journals A Study on Moyna Basin Water-Logged Areas (India) Using Remote Sensing and GIS Methods and Their Contemporary Economic Significance

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Abhay Sankar Sahu
Keyword(s):  
Ground Level ◽  
Monsoon Period ◽  
Fishing Activity ◽  
Clay Particles ◽  
Economic Significance ◽  
Piezometric Surface ◽  
Prime Objective ◽  
Basin Water ◽  
Gis Methods ◽  
Drainage Congestion

The prime objective of this paper is to identify and map the water-logged areas within Moyna basin, India, and to explore their contemporary economic significances. The Landsat 5 TM, ASTER data, and topographical sheets have been taken into consideration with field observations. Maps on relief, slope, canal density, embankments, a supervised classification of the study area and then NDVI, NDWI, and modified NDWI or NDMI have been prepared here. At Moyna, the piezometric surface ranges from five to ten metres below the ground level. The percentage of clay particles is high throughout the surface soil. The total rainfall is nearly 1400 mm and most of it happened during the monsoon period. Two well-marked depressions are observed there within the basin and the nearly central one is wide and is clearly identified from the relief map also. Problem of drainage congestion there accelerates the onset of water-logged situation. In general, water-logged areas are not suitable for humans. People once were worried about the water-logged environment due to underwater scenario of low-lying agricultural fields for a certain period, but today local people are taking this environmental condition as an opportunity for fishing activity and thus they are becoming economically benefitted as well.

An aerial netting study of insects migrating at high altitude over England

2004 ◽  
Vol 94 (2) ◽  
pp. 123-136 ◽  
Author(s):  
J.W. Chapman ◽  
D.R. Reynolds ◽  
A.D. Smith ◽  
E.T. Smith ◽  
I.P. Woiwod
Keyword(s):  
Global Warming ◽  
High Altitude ◽  
North Sea ◽  
Ground Level ◽  
Diel Periodicity ◽  
Tethered Balloon ◽  
Extensive Survey ◽  
Economic Significance ◽  
Large Populations ◽  
The Uk

AbstractDay and night sampling of windborne arthropods at a height of 200 m above ground was undertaken at Cardington, Bedfordshire, UK, during July 1999, 2000 and 2002, using a net supported by a tethered balloon. The results from this study are compared with those from the classic aerial sampling programmes carried out by Hardy, Freeman and colleagues over the UK and North Sea in the 1930s. In the present study, aerial netting was undertaken at night as well as daytime, and so the diel periodicity of migration could be investigated, and comparisons made with the results from Lewis and Taylor’s extensive survey of flight periodicity near ground level. In some taxa with day-time emigration, quite large populations could continue in high-altitude flight after dark, perhaps to a previously underrated extent, and this would greatly increase their potential migratory range. Any trend towards increases in night temperatures, associated with global warming, would facilitate movements of this type in the UK. Observations on the windborne migration of a variety of species, particularly those of economic significance or of radar-detectable size, are briefly discussed.

PRELIMINARY STUDIES OF ROOT AND BASAL STALK ROT OF MATURING CORN IN ONTARIO

1953 ◽  
Vol 31 (1) ◽  
pp. 132-141 ◽  
Author(s):  
W. E. McKeen
Keyword(s):  
Practical Importance ◽  
Ground Level ◽  
Gibberella Zeae ◽  
Corn Stalk ◽  
Stalk Rot ◽  
Economic Significance ◽  
Corn Borers ◽  
Corn Roots ◽  
Corn Plants ◽  
Rot Disease

In Ontario, basal stalk rot of corn occurs in the autumn and is of major importance, whereas bacterial stalk rot is of no economic significance. The latter disease, which results from stomatal penetration by Erwinia dissolvens, may occur on a few susceptible corn plants in early July during extremely hot humid weather, although ordinarily temperatures are sufficiently low in the province to limit its development. Common basal stalk rot of corn is usually initiated by the spread of organisms from diseased corn roots up into the stalks; rotting may begin also in tunnels produced by corn borers. Diplodia zeae and Gibberella zeae, the two pathogens that are responsible for most of the stalk rotting in the central part of the American corn belt, were of no practical importance during the last two years. Bacteria, Pythium arrhenomanes, and Fusarium moniliforme were commonly found in the necrotic part of the corn stalk. Diseased plants begin to appear in mid-August and daily become more numerous until the first killing frost occurs or the plants become senescent. The leaves suddenly droop and wither, and are dead within four or five days after the first symptoms appear. By this time, the basal part of the stalk is necrotic and at least some of the roots are decayed. Pith tissues are destroyed and the stalk frequently breaks over near the ground level. All stalk rot pathogens finally produce the same syndrome. P. arrhenomanes causes a root necrosis at first which later spreads up into the stalk and, in Ontario, is of major importance in the corn stalk rot disease. Pratylenchus pratensis has been found in corn roots but its importance is unknown.

Application of a Simple Cold Stub to the Direct Observation of Frozen Hydrated Sand

1973 ◽  
Vol 31 ◽  
pp. 212-213
Author(s):  
John M. Wehrung ◽  
Richard J. Harniman
Keyword(s):  
United States ◽  
Surface Water ◽  
Direct Observation ◽  
Controlled Study ◽  
Clay Particles ◽  
Organic Debris ◽  
Rock Formations ◽  
Water Tables ◽  
Permeable Rock ◽  
Natural Means

Water tables in aquifer regions of the southwest United States are dropping off at a rate which is greater than can be replaced by natural means. It is estimated that by 1985 wells will run dry in this region unless adequate artificial recharging can be accomplished. Recharging with surface water is limited by the plugging of permeable rock formations underground by clay particles and organic debris.A controlled study was initiated in which sand grains were used as the rock formation and water with known clay concentrations as the recharge media. The plugging mechanism was investigated by direct observation in the SEM of frozen hydrated sand samples from selected depths.

Effects of Vibration on the Preparation of Ultrathin Sections

1973 ◽  
Vol 31 ◽  
pp. 358-359
Author(s):  
Joseph M. Blum ◽  
Edward P. Gargiulo ◽  
J. R. Sawers
Keyword(s):  
Cutting Speed ◽  
Ground Level ◽  
Environmental Vibration ◽  
Block Face ◽  
Ultrathin Sections ◽  
Embedding Medium ◽  
Thickness Variations ◽  
Building Walls ◽  
Cutting Direction ◽  
Diamond Knife

It is now well-known that chatter (Figure 1) is caused by vibration between the microtome arm and the diamond knife. It is usually observed as a cyclical variation in “optical” density of an electron micrograph due to sample thickness variations perpendicular to the cutting direction. This vibration might be induced by using too large a block face, too large a clearance angle, excessive cutting speed, non-uniform embedding medium or microtome vibration. Another prominent cause is environmental vibration caused by inadequate building construction. Microtomes should be installed on firm, solid floors. The best floors are thick, ground-level concrete pads poured over a sand bed and isolated from the building walls. Even when these precautions are followed, we recommend an additional isolation pad placed on the top of a sturdy table.

A global perspective of ground level, 'ambient' carbon dioxide for assessing the response of plants to atmospheric CO2

2001 ◽  
Vol 7 (7) ◽  
pp. 789-796 ◽  
Author(s):  
L. H. Ziska ◽  
O. Ghannoum ◽  
J. T. Baker ◽  
J. Conroy ◽  
J. A. Bunce ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ground Level ◽  
Global Perspective ◽  
Atmospheric Co2

Culture, names and economic development

2016 ◽  
pp. 81-106
Author(s):  
E. Borisova ◽  
A. Kulkova
Keyword(s):  
Economic Development ◽  
Cultural Identity ◽  
Empirical Studies ◽  
Economic Research ◽  
Cultural Norms ◽  
Individual Values ◽  
Personal Names ◽  
Economic Significance ◽  
And Behavior

Various components of culture have long been in the focus of economic research. Numerous empirical studies show that cultural norms, as well as religion and language, matter for economic development and have not only statistical but also economic significance. This paper considers various examples of how culture can affect individual values and behavior. It also deals with personal names as a key marker of one’s cultural identity. Overall, the paper contributes to the more profound understanding of a famous notion that "culture matters", and helps clarify the mechanisms through which culture exerts its influence.

Economic Significance of Social Capital

2011 ◽  
pp. 46-65 ◽  
Author(s):  
L. Polishchuk ◽  
R. Menyashev
Keyword(s):  
Social Capital ◽  
Collective Action ◽  
Common Good ◽  
Economic Conditions ◽  
Formal Institutions ◽  
Transmission Channels ◽  
Economic Significance ◽  
Bonding And Bridging ◽  
The Impact

The paper deals with economics of social capital which is defined as the capacity of society for collective action in pursuit of common good. Particular attention is paid to the interaction between social capital and formal institutions, and the impact of social capital on government efficiency. Structure of social capital and the dichotomy between its bonding and bridging forms are analyzed. Social capital measurement, its economic payoff, and transmission channels between social capital and economic outcomes are discussed. In the concluding section of the paper we summarize the results of our analysis of the role of social capital in economic conditions and welfare of Russian cities.

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