Abstract. Eliminating the leakage current is one of the most important issues for transformerless inverters in grid-connected photovoltaic system applications, where the technical challenge is how to keep the system common-mode voltage constant to reduce the leakage current. A novel singlephase three-level topology for transformerless photovoltaic systems is presented in this paper. Compared wi...

This article describes the initial phase of a study where a sample of 72 questionnaires have been distributed to people who identified themselves as Internet users that participate in e-communities for business purposes the data collected where analyzed. The purpose of the research was to investigate the perceptions of online buyers in Greece and study their online behavior when participating i...

In today's world, Public expenditures on health are one of the most important issues for governments. These increased expenditures are putting pressure on public budgets. Therefore, health policy makers have focused on the performance of their health systems and many countries have introduced reforms to improve the performance of their health systems. This study investigates the most important ...

Although business executives remain skeptical about the extent of payoffs from investment in information technology (IT), strategic alignment or the alignment of information systems strategy with business strategy continues to be ranked as one of the most important issues facing corporations. In this paper, we report on the results of a process-level study to investigate the relationship betwee...

Mobile Ad hoc networks (MANET) allow a set of wireless hosts to exchange information without any special infrastructure. The projct entitled “Energy Optimization in Manets using On-Demand Routing Protocol” motivates the need for energy management in ad hoc wireless networks. Limited battery power is one of the most important issues in mobile ad hoc network as the mobile nodes operate in limited...

The total damage cost is the sum of renovation cost and amenity loss. We show that amenity loss can be inferred from renovation expenditures without carrying out a contingent valuation; the amenity loss is approximately equal to the renovation cost. We review the methodologies for calculating air pollution damage to buildings, as well as the data available for their implementation in France. Th...

The main components which affect the earthquake damage grades classification of multistory masonry buildings and the damage characters are summarized and analyzed through the statistics and analysis of a large number of previous earthquake damage data. According to the standard of earthquake damage grades classification, the damage numbers of each component of multistory masonry buildings under...

ii Abstract When a given 3D city model, consisting of mainly buildings and roads, is viewed at reduced scale, its objects not only become smaller but tend to conflict due to small area available. Generalization plays an important role to overcome these effects and helps in preserving the required legibility. Various operations are performed during generalization on these objects. One of the pri...

Seismic risk scenarios are obtained for an informal settlement in Mérida (Venezuela), which is representative of an important number of urban areas in earthquake-prone regions of the developing world. The vulnerability indices of the buildings range between 0.64 and 0.80 on a scale of 0 to 1. In an intensity IX earthquake scenario, more than 32% of the buildings would suffer damage of grade 4 (...

Automatic building detection plays an important role in many applications. Traditionally, buildings were detected from monocular or multi-view images, DEM or DSM, and laser scanner data. Oblique imagery is a relatively new data source with distinct advantages: it provides detailed information on facades and multiple views from various perspectives. In this paper we present exploration tests usi...