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

Manufacturing discontent: John Heartfield's mass medium

Because photomontage is based on the structural principle of pictorial rupture and re-assembly, the medium is understood in scholarly literature as the symbolic register of the shocks and disjunctures of modern life. Yet, I point out that most of the photomontages that John Heartfield manufactured for the communist journal Die Arbeiter Illustrierte Zeitung (AIZ) insistently suppress the seams and ruptures of their manufacture, instead offering up pictorially-sutured photomontages that propagate fictions of visual wholeness rather than of cognitive ruptures. They do so, I argue, in order to issue an ideological critique from a leftist perspective, staging our illusory, unstable apprehension of the world. Characterized by a continuity of surface, these photomontages are bound into (and thus integral to) a mass-circulation journal, in critical dialogue with the photo-reportages that preceded and followed them occasionally in content, but primarily though imitation of their matter, their medium, their form. Heartfield's AIZ works offer a radical Left critique of the mass-circulated photograph and its production of political consciousness by internalizing and miming its very means through photomontage. Leftist critique in John Heartfield’s montages, I maintain, resides in suture. In using the term ‘suture’ to discuss Heartfield’s work, I incorporate its cinematic connotations, in their most basic sense, into my analysis, considering how his photomontages summon their beholder both optically and psychologically. We have not entirely grasped the metaphoric operations of photomontage until we have understood the role of pictorial suture, and the deliberate suppression of rupture, in John Heartfield’s project

TRANSPORTATION ISSUES AFFECTING PRODUCTIVITY IN THE FOOD INDUSTRY: TRANSPORTATION

Productivity Analysis,

Lessons Learned: Solutions for Workplace Safety and Health

Provides case studies of workplace health hazards, regulatory actions taken, and solutions, including product and design alternatives; a synthesis of findings and lessons learned; and federal- and state-level recommendations