Most of today’s high-speed switches and routers adopt an input-queued crossbar switch architecture. Such a switch needs to compute a matching (crossbar schedule) between the input ports and output ports during each switching cycle (time slot). A key research challenge in designing large (in number of input/output ports N) input-queued crossbar switches is to develop crossbar scheduling algorith...

The Ports of Long Beach and Los Angeles are the largest container port complex in North America and fifth largest in the world. Growth in U.S. Pacific Rim trade has put pressure on the landside transportation systems serving these two ports. In order to address this growth and mitigate environmental impacts, the ports are implementing new operational strategies and infrastructure improvements. ...

This paper presents a class of algorithms for scheduling packets in input-queued switches. As opposed to previously known algorithms that focus only on achieving high throughput, these algorithms seek to achieve low average delay without compromising the throughput achieved. Packet scheduling in input-queued switches based on the virtual-output-queued architecture is a bipartite graph matching ...

Context: Cholecystectomy is the most commonly performed operation by general surgeons worldwide and the lesser invasive technique i.e. the laparoscopic cholecystectomy is the preferred operative technique both for the patient as well as for the surgeon. Conventionally laparoscopic cholecystectomy is performed by using three or four ports of various sizes. As cosmesis is an important aspect of l...

This article aims to investigate the location of dry ports by providing a two-stage GIS-optimization model. At the first stage, the appropriate points for establishing dry ports were identified using GIS and hierarchical analysis process; then, the suitable points were introduced as the potential points to the second stage model. At the second stage, by providing a multi-objective integer model...

Idea In Brief In real industrial and instrumentation (I&I) applications, RS-485 interface links must work in harsh electromagnetic environments. Large transient voltages caused by lightning strikes, electrostatic discharge, and other electromagnetic phenomenon can damage communications ports. To ensure that these data ports can survive in their final installation environments, they must meet ce...

This paper considers a new variant of the maritime inventory routing problem which considers multiple time windows. The typical time windows that this problem considers that it may exist for certain ports which only permit a ship entering and leaving the ports within daytime due to both natural conditions and their facilities. A mathematical model formulated as mixed integer programming is deve...