1bis two-part paper describes a compressor redesign program for improving efficiency, lowering sound emission, and cost. Part I indicates how the efficiency goals were met through reduced flow losses, reduced superheat in suction flow path, and improved valve and port design.

The big picture of Internet could be depicted with the AS map made from BGP routing tables. The traffc distribution statistics on this AS map will be usefule for understanding of Internet dynamics. Particularly, it is interesting to find which AS path are used for Internet traffic exchange between two ASes. The correlation between Internet traffic and AS path will be also important for future I...

The network of delivering commodities has been an important design problem in our daily lives and many transportation applications. The delivery performance is evaluated based on the system reliability of delivering commodities from a source node to a sink node in the network. The system reliability is thus maximized to find the optimal routing. However, the design problem is not simple because...

A Mesh Network Topological Optimization and Routing II (MENTOR-II) algorithm is a low complexity and efficient network design algorithm for IP networks with OSPF routing protocol in which appropriate link weights are assigned to the installed links such that the traffic always routes on the path with minimum distance. However, it should be noted that the flow delay of traffic assigned by MENTOR...

This paper presents the use of CFD as a design tool in the development of rotary compressor for the purpose of reduction in Oil Circulation Rate (OCR). In the present work, CFD analysis is done using a commercial CFD package to simulate the discharge gas flow within the rotary compressor. Discharge gas flow path in the compressor is redefined by providing features that support OCR reduction. On...

We propose new cycle-based neighbourhood structures for meta-heuristics aimed at the fixedcharge capacitated multicommodity network design formulation. The neighbourhood defines moves that take explicitly into account the impact on the total design cost of potential modifications to the flow distribution of several commodities simultaneously. Moves are identified through a shortest path-like ne...

This paper covers the development of stage-by-stage and parallel flow path compressor modeling approaches for a Variable Cycle Engine. The stage-by-stage compressor modeling approach is an extension of a technique for lumped volume dynamics and performance characteristic modeling. It was developed to improve the accuracy of axial compressor dynamics over lumped volume dynamics modeling. The sta...

Question: How can we better understand the impacts of lean practices and BIM-based design on the flow of design information? Purpose: The purpose of this paper is to present a formerly unexplored perspective that integrates both the process, i.e., flow of design information, and the social network, i.e., interactions among design teams. This process-social perspective is used to understand, mea...