How does cellular traffic switch direction on microtubules, or switch back and forth between microtubule- and actin-based tracks? A pair of recent studies mimics the layout of motors and tracks within the cell to provide intriguing answers to these questions.

Quantum Dot Cellular Automata is a Nano device efficient than other devices in nanotechnology for the last two decades. It beneficial over Complementary Metal Oxide Semiconductor technology like high speed, low energy dissipation, density and computation efficiency. To achieve further optimization different methods simplifications Boolean expressions, tile method, clocking scheme, cell placemen...

Teaching quantitative courses can be challenging. Similarly, layout modeling and lean production concepts can be difficult to grasp in an introductory OM (operations management) class. This article describes a simulation model developed in PROMODEL to facilitate the learning of layout modeling and lean manufacturing. Simulation allows for the evaluation of layout alternatives and the testing of...

INTRODUCTION: The appropriate-use optimization of the limited spaces of the Iranian hospitals is believed to be a crucial step towards promoting the efficiency of these healthcare centers. The issue determining the optimization patterns of the layout of units has led to a lot of efforts by researchers as it increases the efficiency of the hospitals through patients’ improvement, changing the lo...

this paper offers an approach that could be useful for diverse types of layout problems or even area allocation problems. by this approach there is no need to large number of discrete variables and only by few continues variables large-scale layout problems could be solved in polynomial time. this is resulted from dividing area into discrete and continuous dimensions. also defining decision var...

These days, people access the Web by using various devices and methods, such as PDAs, cellular phones, and voice-based browsers. However, most Web content is designed for desktop computers. Therefore, alreadyexisting Web content should be transcoded to be suitable for each access device and method. For this purpose, some annotation-based transcoding systems have been developed. An annotation is...

Cellular mobile networks have enabled ubiquitous communications and largely changed the way we live and work. At the same time, the network itself has been undergoing significant changes in the process of meeting our ever increasing demands on data rate and quality of service. In this article, we show the path of the evolution in both standards and techniques, and provide our vision for the fut...