This study uses a cross-country panel to examine the determinants of corruption, paying particular attention to political institutions that increase accountability. Even though the theoretical literature has stressed the importance of political institutions in determining corruption, the empirical literature is relatively scarce. Our results confirm the role of political institutions in determi...

Davis, Jedwab and Smith recently proved that there are no 2-dimensional Barker arrays except of size 2×2. We show that the existence of a (d+1)-dimensional Barker array implies the existence of a d-dimensional Barker array with the same number of ±1 elements. We deduce that there are no Barker arrays having more than two dimensions, as conjectured by Dymond in 1992.

Urban-scale traffic monitoring plays a vital role in reducing traffic congestion. Owing to its low cost and wide coverage, floating car data (FCD) serves as a novel approach to collecting traffic data. However, sparse probe data represents the vast majority of the data available on arterial roads in most urban environments. In order to overcome the problem of data sparseness, this paper propose...

motorcyclists consist most of population of traffic foundation. more statistic of accident, more danger of injury, being in open and load environment can be of causes to make motorcyclists in exposure to more anxiety in comparison to other vehicles. motorcyclist's anxiety can be one of the most significant reasons in accidents. in this study we surveyed the rate of anxiety in motorcyclists...

THE US HEALTH SYSTEM FACES ONGOING CHALLENGES in addressing its shortcomings in access and quality. Against a foreground of uneven and fragmented care lies a bleak background of unrelentingly accelerating costs. Although the problems of quality and costs are long-standing, several organizations have recently asserted that there is a new impending health care “tragedy”: the physician workforce s...

nowadays, because of the growing numbers of vehicles on streets and roads, the use of intelligent controlsystems to improve driving safety and health has become a necessity. to design and implement suchcontrol systems, having information about traffic light colors is essential. there are the wide variety oftraffic lights in terms of light intensity and color. therefore it seems that design and ...

Nowadays, the use of intelligent control systems to reduce human error is one of the most popularresearch fields. Design and implementation of such controllers requires to actual knowledge of theenvironment conditions. Traffic lights as one of the inputs of intelligent control systems are significant.usually the traffic lights have the various physical structure. also, generally in image proces...