NETS News

Vol III, Issue 3  March 2007
 

NETS Releases Random Number Generation Library for Microsoft .NET Platform
The NETS program has announced the availability of a version of the Army Research Lab random number generation library that is designed to be used within the Microsoft .NET framework – ARL# (ARL Sharp). The use of this library provides a sound and trustworthy source of statistical pseudo-random numbers for the purpose of Monte-Carlo simulation. For full description and contact information see www.corpsnets.us/docs/NavSysSim/ARLSharpAnnouncment.pdf (pdf, 14KB).

Fact Sheet (NaSS)

Decision Tools Wins Award
Decision Tools for Reducing Congestion at Locks on the Upper Mississippi River was selected to receive a HICSS-40 Best Paper Award in the Decision Technologies and Service Sciences Track at the 2007 Hawaii International Conference on System Sciences. The paper, based on work partially funded by the NETS program, was one of ten Best Paper Awards chosen from 506 papers that were given a Final Acceptance for the conference. Written by James F. Campbell, PhD, L. Douglas Smith, PhD, Donald C. Sweeney II, PhD, Ray Mundy, PhD, and Robert M. Nauss, PhD, the paper was presented as part of the Decision Technologies and Service Sciences mini-track “Intelligent Decision Support for Logistics and Supply Chain Management” in January.

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Estimation of Required Waterway Depth at U.S. Ports for U.S. Naval Vessels
In cooperation with the Optimization Tools for Navigation (OTN) and Navigation Economic Technologies (NETS) programs, the U.S. Navy has been undertaking research and analysis to evaluate underkeel and associated safety clearance requirements for U.S. Naval vessels. Related work is now largely complete and is undergoing review within the Navy. Information derived from this work will help provide USACE planners with objectively determined requirements for U.S. Naval Vessels when planning improvements or prioritizing maintenance for the nation's waterway system. A date has not yet been established for transmittal of findings to USACE, but once described information is available District-level planners will be able to consult with designated points of contact at HQUSACE for support in the evaluation of needs for naval ships when planning future waterway improvements or maintenance. Due to the possible sensitivity of the information in the current environment, related information or findings will not be publicly distributed or posted on any website.

Transportation Research: Part B to Publish NETS Research
NETS Researchers Kenneth Train, PhD and Wesley W. Wilson, PhD recently had a paper accepted by Transportation Research: Part B. The paper, "Estimation on Stated-Preference Experiments Constructed from Revealed-Preference Choices" is a revision of technical report IWR Report 05-NETS-P-08 (pdf, 1.25MB). It has been presented on multiple occasions, most recently by Kenneth Train for the Robert R. Holdren Memorial Lecture at Iowa State March 5, 2007.

This research forms the primary demand modeling strategy developed under NETS. The basic idea is that analysis of demand is grounded in the discrete decisions made by shippers. Estimation of choice models using revealed data is limited by the lack of sufficient variation in the attributes, such as rates, of shippers. Estimation of choice models using stated preference is often criticized as lacking the “realism” of revealed data. In this research, Professors Train and Wilson have developed a methodology to combine both revealed and stated preference data, the latter being constructed from the revealed data. The result provides a body of data that contains sufficient variation to identify the parameters driving choices, allows the stated preference data to be grounded in the reality of the revealed choice, and allows a direct evaluation of the consistency of revealed and stated preference decision-making to be evaluated.

NETS Researcher to Travel to China, Hong Kong
Professor Wesley Wilson has been invited and will be traveling to Hong Kong and Chengdu, China in May. In Hong Kong, as a member of the Global Task Force for Port Benchmarking, he will attend the annual meetings of the Public Policy Research Institute. He has been asked to make two presentations: (1) Summarize the theoretical advances and applications of NETS demand modeling and (2) Describe the body of research developed under NETS. In Chengdu, he will present a seminar at the Southwestern University of Finance and Economics and also speak to a more general audience.

 

NETS web site: www.corpsnets.us

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Navigation Economic Technologies Program, US Army Corps of Engineers