The Chandra X-ray Observatory obtained a 50-ks observation of the central region of M81 using the ACIS-S in imaging mode. The global properties of the 97 x-ray sources detected in the inner 8.3× 8.3 field of M81 are examined. Roughly half the sources are concentrated within the central bulge. The remainder are distributed throughout the disk with the brightest disk sources lying preferentially ...

Improved characterization of distributed emission sources of greenhouse gases such as methane from concentrated animal feeding operations require more accurate methods. One promising method is recently used by the USEPA. It employs a vertical radial plume mapping (VRPM) algorithm using optical remote sensing techniques. We evaluated this method to estimate emission rates from simulated distribu...

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The increasing need for Decision Support Systems for business enterprises has lead to tremendous growth of Data Warehouses. Within large enterprises number of data sources is increasing; due to which Data Warehouses are getting more and more complex. The ETL componentone of the basic components of data warehousecan be made simpler with the use of Distributed Database technology in the developme...

Vent opening hazard models are routinely used as inputs for assessing distal volcanic hazards (lava flows, tephra fallout) in distributed fields. These vent have traditionally relied on the location of mapped vents; seldom they taken into account how vents linked space and time. We show that needed to appropriately model fundamentally different than thoses required near-vent (ground deformation...

iran is one of the most concentrated areas of afghan migrants and refugees. most afghans dispersed throughout the country mixed with iranian households. the majority of afghan immigrants are typically unskilled and illegal workers. this study aims at investigating the nature of the causal relationship between afghan immigrants and two main labor market indicators, average wages and unemployment...