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 response of karoun basin in lumped and semi-distributed simulation were compared. also, the flood intensity of the sub-basins and the effects of physical parameters on flood hydrograph have been investigated. results demonstrated that there was no significant difference between the characteristics of flood hydrograph in lumped and semi-distributed simulation. also, results showed that the f...