Dynamic mechanical activity in a tunnel can be measured as ground vibrations at offset distances. These signals can be processed in sensing algorithms for detection, location, and discrimination of the activity. The objective of this work is to demonstrate that seismic simulations can reveal the effect of the environment on seismic energy as it propagates from tunnels. Using massively parallel ...

This paper describes work aimed at developing a practical shape-from-shading process for terrain analysis from radar imagery. The paper commences by providing an analysis of the radar reflectance properties of terrain structures. By using ground truth elevation data, we provide an empirical study of the radar reflectance characteristics for large-scale terrain features. The main conclusion of t...

We analyze broadband electromagnetic measurements of pulse sequences occurring prior to first return strokes of negative cloud-to-ground lightning flashes. Signals generated by lightning discharges were recorded close to the thunderstorm by a magnetic field receiver and traveled up to 600km to three distant electric field receivers. We found that amplitudes of observed preliminary breakdown pul...

Approved for public release; distribution is unlimited. Approved for public release; distribution is unlimited. OBJECTIVE This report analyzes very high frequency signal strength data from two Naval Oceanic & Atmospheric Administration weather radio transmitters located in southern California and southwestern Arizona over a wide range of topography ranging from relatively flat to mountainous te...

Hyperspectral characteristics of ground features are the basic data modern remote sensing. In this paper, reflectance spectrum detection was carried out on altered rock and soil from mountainous environment. The analysis between its related compositions studied samples collected. typical hyperspectral their influencing factors were proposed. relevant conclusions could provide spectral informati...

The aim of this study was to test whether there is an association between elevation and cognitive function among elderly residents in rural mountainous areas. Data were collected in 2012 from a cross-sectional study conducted in Ohnan Town, which is located in a rural mountainous area in the southern part of Shimane Prefecture, Japan. Cognitive function was evaluated using CADi (Cognitive Asses...

Constructed upon a height (by footing) or breaking in to the ground, in a building, making a close relation between earth and soil is of great importance. In addition, earth as a prior factor in creation of a shade and residence, plays a crucial role in architecture history. Throughout the different area, earth is paid attention differently: as a source of cool (in China), a source of heat (Cap...

STUDY OBJECTIVE To investigate the association of residence in mountainous or lowland areas with total and coronary mortality, in a cohort with 15 years of follow up. DESIGN AND SETTING Prospective study, based on the adult population of two lowland and one mountainous village in rural Greece. Baseline measurements on sociodemographic, lifestyle, somatometric, clinical, and biochemical variab...