In this paper, we present a fast algorithm for continuous wire-sizing under the distributed Elmore delay model. Our algorithm GWSA-C is an extension of the GWSA algorithm (for discrete wire-sizing) in CL93a]. GWSA-C is an iterative algorithm with guaranteed convergence to optimal wire-sizing solutions. When specialized to discrete wire-sizing problems, GWSA-C is an improved implementation of GW...

Discrete gate sizing is a critical optimization in VLSI circuit design. Given a set of available gate sizes, discrete gate sizing problem asks to assign a size to each gate such that the delay of a combinational circuit is minimized while the cost constraint is satisfied. It is one of the most studied problems in VLSI computer-aided design. Despite this, all of the existing techniques are heuri...

In this study, a sizing system is proposed specifically for school-aged children in Malaysia. The sampling frame is based on the female population in the age group 7-17. For this study, 1001girls have been selected randomly from 29 different schools in urban and rural districts of Malaysia. Principal component analysis is used for key dimensions determination. Data mining has been done to devel...

This paper presents a comparison of CO2 products derived from Scanning Imaging Absorption Spectrometer for Atmospheric Cartography (SCIAMACHY), Greenhouse Gases Observing Satellite (GOSAT) and Atmospheric Infrared Sounder (AIRS), with reference to calibration data obtained using the high-resolution ground-based Fourier Transform Spectrometers (g-b FTS) in the Total Carbon Column Observing Netwo...

A team from the Naval Postgraduate School conducted a trade-off analysis of in-sourcing (i.e., make) versus outsourcing (i.e., buy) the production of legacy parts for ship maintenance and modernization with a focus on cost savings given the need for cost-effective sustainment. The purpose of the study was to compare the make/buy trade-off for a comparison of implementing 3DLST, 3DP, and CPLM fo...

A simulation model for evaluating the performance of an emergency response fleet of an electric utility company is presented. The proposed model considers the spatial, temporal, and severity distribution of calls and has the capability to simulate alternative configurations of service districts and dispatching policies of the emergency response fleet. A nonstadonary Poisson process is used to s...

We develop a model to determine the optimal structure and size of a rail car fleet at a chemical company under uncertainty in demand and travel times as well as substitution between rail car types. First, we formulate an MILP model that accounts for the substitution relations between the types and minimizes the total direct rail car cost under given rail car availability constraints and a prede...

If your irrigation system is not performing as efficiently as you would like then it may be time to consider updating. This can be done by renewing sprinklers, installing a more advanced control panel, renewing that worn out pump — or a complete redesign of the whole system using modern technology. If you already have Weather-matic equipment installed, Prime offers a full repair and maintenance...

In This Issue In This Issue Ready…set…fuse he fusion of two lipid membranes underlies a huge range of biological phenomena, from infection by enveloped viruses to the secretion of cellular proteins , but a central aspect of membrane fusion has remained mysterious: do the T proteins that mediate fusion act cooperatively or independently? On page 833, Markovic et al. argue that teamwork is the or...

Given a flight schedule, which is a set of flight segments with specified departure and arrival times, and a set of aircraft:, the fleet assignment problem is to determine which aircraft type should fly each flight segment. The objective is to maximize revenue minus operating costs. In the basic fleet assignment problem considered by Hane et al. (1995) a daily, domestic fleet assignment prohlem...