Offset plane wave migration and common-azimuth migration are among the most promising wave-equation migration methods for efficiently imaging 3-D marine data sets. Offset plane wave migration has some computational advantages over common-azimuth migration, but common-azimuth is more accurate. Sub-salt images produced by commonazimuth migration are better focused than the corresponding images pr...

Introduction: Travel health centers offer very important health services for individuals traveling abroad. Little is known about the health status and knowledge of travel health, travel-related diseases, and vaccinations of individuals who travel abroad and visit travel health centers. This research studied travelers who visited a travel health center in order to evaluate their...

A Household Travel Survey (HTS) is a valuable instrument for collecting data suitable for studying the travel behaviour of a sample of households in a specific geographical context. One important output from the trip data after expansion to the population is a set of origin-destination (O-D) trip matrices for combinations of trip purpose, time of day and mode of transport. However, the O-D matr...

T IME travel, I maintain, is possible. The paradoxes of time travel are oddities, not impossibilities. They prove only this much, which few would have doubted: that a possible world where time travel took place would be a most strange world, different in fundamental ways from the world we think is ours. I shall be concerned here with the sort of time travel that is recounted in science fiction....

Rapid urban growth is resulting into increase in travel demand and private vehicle ownership in urban areas. In the present scenario the existing infrastructure has failed to match the demand that leads to traffic congestion, vehicular pollution and accidents. With traffic congestion augmentation on the road, delay of commuters has increased and reliability of road network has decreased. Four s...

An autonomous surface vehicle, known as a wave glider, was used to record refracted and reflected signals from seismic source penetrating the shallow subsurface. integrated survey system consisting of gilder human-operated vessel deployed. These systems are acquire wide-offset data specific areas, such offshore structures. The gliders can collect refraction reflection data, which be estimate su...

this study was conducted to investigate the effect of soil moisture content in primary tillage and travel speed during disking operation on the performance of an offset disk harrow in a silty clay loam soil. at first, the effect of three soil moisture content ranges of (12-14), (14-16) and (16-18) percent (dry basis) on soil clod size (left from moldboard plowing) was investigated. then, the pe...

Abstract Full waveform inversion (FWI) in the time domain has limitations due to large computing and memory requirements. Some studies have addressed this problem by using machine learning techniques. Most FWI directly estimate subsurface velocity structure training seismic data generated through various synthetic models obtain structure. In study, we propose a method convert common midpoint (C...