We report a non-equilibrium molecular dynamics (MD) study on heat conduction of finite-length single-walled carbon nanotubes (SWNTs). The length and diameter dependences of the thermal conductivity are quantified for a range of nanotubelengths up to a micrometer at room temperature using two different temperature control techniques. A thorough investigation was carried out on the influence of i...

in desert areas high temperature and low precipitation limit growth and development of plants. under this circumstances wind becomes the most important erosion and transportation factor in these areas. there are four great sand masses in the central part of dasht-e-kavir namely rig-e-jen, rig-e-sargardan (shotori or halvan), rig-e-kharturan, and rig-e- chah-e-jam. these great sandy masses show ...

introduction dust storms, one type of dust event, are in most cases the result of turbulent winds, including convective haboobs, which raise large quantities of dust from desert surfaces and reduce visibility to less than 1 km. this dust reaches concentrations in excess of 6000 mg m3 in severe events. the major dust source regions are areas of arid and hyper-arid, with mean annual rainfalls of ...

Obtaining accurate estimates of population density (i.e. the number individuals per area) continues to be a constant challenge for wildlife management and conservation (Nichols & Williams, 2006). It is widely recognized that estimating size costly, results are often not sufficiently precise well-informed purposes (Morellet et al., 2007). Feasible methods with which attain are, therefore, in gre...

Convectional Omni directional sensors that always have an omni angle of sensing range, directional sensors may have a limited angle of sensing range due to the technical constraints or cost considerations. A directional sensor network consists of a number of directional sensors, which can switch to several directions to extend their sensing ability to cover all the targets in a given area. Impr...

Geopressured brines are a vast geothermal resource in the US Gulf of Mexico region. In particular, geopressured sandstones near salt domes are potential sources of geothermal energy because salt diapirs with high thermal conductivity may pierce younger, cooler strata. These characteristics enhance transfer heat from older, hotter strata at the base of the diapir into shallower strata. Moreover,...

Performance of seedlings of seven rain forest, canopy dominant Shorea species was studied in a transplant experiment in forest sites a t three different elevations (low, mid and high) M-ithin the humid zone of southlt-est Sri Lanka. Five species generally inhabit lo~vto mid-elevations, one at midand lo~ver montane elevations, and one exclusively at lower montane elevations. Temperature, rainfal...

Facing great challenges in designing better assistive technology with ever more complex and pervasive IT systems we need a general change in our understanding of designing IT. Ways to improve the performance of IT without drowning in complexity are of prime importance. This paper presents bio-mimetic design of Ambient Intelligence as a candidate heuristic for the task. It is shown how better as...