BACKGROUND Travel-related barriers to human immunodeficiency virus (HIV) care, such as commute time and mode of transportation, have been reported in the United States. OBJECTIVE The objective of the study was to investigate the association between public transportation use and HIV care attendance among a convenience sample of Atlanta-based, HIV-positive men who have sex with men (MSM), evalu...

Travel time is widely recognized as an important performance measure for assessing transportation system, it is a meaningful parameter in theory and practice. Previous researches about travel time mainly focus on two areas: first, the research object is the unit of the transportation network, and there is little research on the area transportation network travel time; second, previous researche...

Travel time estimation is of increasing importance to travelers and transportation professionals alike as congestion worsens in major urban areas. In fact, the reliability of travel time estimates on a given corridor may be more important for travelers, shippers, and transport managers than the travel time itself. This paper examines the uses of measured travel time reliability indices for impr...

This paper discusses a two-stage interval time minimization transportation problem with capacity constraints on each source-destination link. In the current problem, the exact total demand of all the destinations lies in an interval whose end points are equal to the minimum and the maximum total available amount of the homogeneous product (which is being transported), at the sources. The minimu...

This paper is aimed at studying the Time Minimizing Transportation Problem with Fractional Bottleneck Objective Function (TMTP-FBOF). TMTP-FBOF is related to a Lexicographic Fractional Time Minimizing Transportation Problem (LFTMTP), which will be solved by a lexicographic primal code. An algorithm is also developed to determine an initial efficient basic solution to this TMTP-FBOF. The develop...

Methanol has been promoted as an alternative transportation fuel from time to time over the past forty years. In spite of significant efforts to realize the vision of methanol as a practical transportation fuel in the US, such as the California methanol fueling corridor of the 1990s, it did not succeed on a large scale. This white paper covers all important aspects of methanol as a transportati...

This paper presents an approach for finding an optimal schedule of n-jobs and m-machines flowshop scheduling problem involving transportation time between jobs by using neural networks. An algorithm has been given for finding the optimal sequence in scheduling problem without transportation time [2]. Here, this algorithm is applied when transportation times are involved between machines to find...