Ad-hoc localization in multihop setups is a vital component of numerous sensor network applications. Although considerable e ort has been invested in the development of multihop localization protocols, to the best of our knowledge the sensitivity of localization to its di erent parameters (network density, measurement error and beacon density) that are usually known prior to deployment has not ...

  Abstract  One of the suitable and beneficial methods in promoting behaviors of road traffic injury prevention could be the application of educational programs. Therefore, the aim of this study was to determine the effect of health belief model on preventive behaviors related to road traffic injuries among primary school students. 100 participants was randomly selected among four...

Road authorities have confronted problems to maintaining the serviceability of road infrastructure systems by using various traditional methods of contracting. As a solution to these problems, many road authorities have started contracting out road maintenance works to the private sector based on performance measures. This contracting method is named Performance-Based Maintenance Contracting (P...

forests are an important economic source for human and have key role in nutrient cycle, hydrology and ecosystem performance, any interference in this vital ecosystem causes to damage to forests. mechanical logging and road construction in forest areas have led to much soil compaction. soil physical and chemical properties were studied in parts of road and non-road in the darabkola forest of ira...

forests as a renewable source has effective and useful role in economic and social activities of society. network of forest roads as infrastructure division’s forest planning units (compartments) of forest management plans, management, logging, exit of wood and plays a major role forest protection. aim of this study, designed forest road network according to multi-purpose forestry using the net...

The paper gives an overview and a brief status of the activities of the High-Performance Group of the Standard Performance Evaluation Corporation. SPEC/HPG has recently released a rst suite of benchmarks, called SPEChpc96, that will be used to evaluate high-performance computer systems across the wide spectrum of available systems. The benchmark suite includes industrially signi cant applicatio...

A picturesque way to see a large network of links shared by many infinitesimally small selfish users is as a large pipeline infrastructure with users as liquid molecules flowing into it. When the owner of such a selfishly congested network tries to improve its flow speed, the common sense suggests to focus and fix links that seem older and slower. Contrary to this belief, Braess's paradox illus...

Currently, comparisons of road safety performance at a national or sub-national level are worthy of being conducted; both in order to better understand one’s own situation in regards to road safety risk, and to find a meaningful reference (best-in-class) to learn lessons in terms of action program formulation. In this respect, the composite road safety performance index, which condenses the vas...