MANAGEMENT OF ROUTING AND SCHEDULING COMPANY TRUCKS

The author describes the use of the "Lokset method" for routing and scheduling deliveries, with special emphasis on data requirement.Agribusiness,

CAPITAL EFFICIENCY OF FACILITIES AND EQUIPMENT

Agribusiness,

SOME OPTIONS FOR MOTOR FREIGHT TRANSPORTATION IN A FUEL CONSTRAINED ENVIRONMENT

Public Economics,

TRANSPORTATION POLICY AND THE RURAL ENVIRONMENT

Public Economics,

The two-stage clonal expansion model in occupational cancer epidemiology: Results from three cohort studies

Copyright © 2010 by the BMJ Publishing Group Ltd. All rights reserved.Objectives: The objective of this work was to apply the two-stage clonal expansion model, with the intention to expand the literature on epidemiological applications of the model and demonstrate the feasibility of incorporating biologically based modelling methods into the widely used retrospective cohort study. Methods: The authors fitted the two-stage clonal expansion model model to three occupational cohort studies: (1) a cohort of textile workers exposed to asbestos and followed for lung cancer mortality; (2) a cohort of diatomaceous earth workers exposed to silica and also followed for lung cancer mortality; and (3) a cohort of automotive manufacturing workers exposed to straight metalworking fluid (MWF) and followed for larynx cancer incidence. The model allowed the authors to estimate exposure effects in three stages: cancer initiation (early effects), promotion or malignant transformation (late effects). Results: In the first cohort, the authors found strong evidence for an early effect of asbestos on lung cancer risk. Findings from analyses of the second cohort suggested early and less evidently late effects of silica on lung cancer risk. In the MWF (third) cohort, there was only weak evidence of straight MWF exposure effects on both early and late stages. The authors also observed a late birth cohort effect on larynx cancer risk. Conclusions: The findings for asbestos and silica were essentially confirmatory, supporting evidence for their early effects on lung cancer from a large body of literature. The effect of straight MWF on larynx cancer was less clear.This work was supported by a grant from the US National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention,R01-OH03575, and a grant from the Centers for Disease Control and Prevention/ Association of Teachers of Preventive Medicine number TS 0699

Predicted and measured performance of two full-scale ducted propellers

Predicted and measured performance of two full- scale ducted propellers at angle of attack - analytical model developmen

TRANSPORTATION ISSUES AFFECTING PRODUCTIVITY IN THE FOOD INDUSTRY: TRANSPORTATION

Productivity Analysis,

Refrigerated transportation by motor common carriers : a management inquiry

"3/69/2.5M""The youthful trucking industry had fewer than 100 thousand vehicles 50 years ago. It registered 13.3 million trucks of all types in 1964. By capitalizing on speed and completeness and flexibility of service, this industry has become so important that it is an indispensable part of our modern food marketing system. As the shipping requirements of numerous commodities become more specific, the motor carrier industry is entering a new era of specialization to satisfy these demands and to increase profits. ... Little is known about the problems of refrigerated motor carriers and of the opportunities open for educational work by Extension marketing personnel. This study analyzes the use of refrigerated transportat10n by 15 Midwest motor common carriers and the carriers' problems that tend to interfere with business efficiency. The study method used is a firm-by-firm analysis of carriers."--First page.Wesley R. Kriebel (Extension Economist, Marketing and Transportation, Pennsylvania State University), David E. Moser (Extension Economist, Marketing and Transportation, University of Missouri--Columbia

Guidelines for an extension educational program in transportation

"This publication has been prepared primarily for Extension personnel assigned to develop a state-level educational program in transportation. It provides broad program guidelines as a reference or starting point for the transportation specialist. It will also be helpful to the Extension economist or marketing specialist who may be called upon to deal with transportation and physical handling problems encountered in a commodity marketing or firm management assignment."--First paragraphDavid E. Moser (Extension Economist, Marketing and Transportation ; University of Missouri), Wesley R. Kribel (Extension Economist, Marketing and Transportation ; Pennsylvania State University

Stall propagation in a cascade of airfoils

August 1956Also issued as: Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1956Includes bibliographical referencesAn experimental investigation of stall propagation in a stationary circular cascade by means of high speed schlieren and interferometer photography is described. This investigation suggests an analytical approach to the problem which is valid only for an isolated blade row in an infinite flow field but which is not restricted to small unsteady perturbations or an assumed simplified cascade geometry. Conditions necessary for the existence of the assumed type of stall cells are described and equations are derived for the velocity of stall cell propagation. The propagation velocities predicted for the theoretical potential flow-model correlate with all the experimental values measured in an isolated rotor within 15%. Analysis of the flow model predicts a tendency for the assumed type of stall cell to split with increasing incidence of the mean flow through the blade row which appears to correlate with the experimental observation of a trend for increasing numbers of cells in the rotor.The work described in this report was carried out under the sponsorship of the National Advisory Committee for Aeronautics, Contract No. Nmw-6446 M.I.T. Contract No. DIC 738