EADS - Ergonomics Affinity Design System

The Ergonomics Affinity Design System (EADS) is a systematic problem-solving tool used to analyze and solve ergonomics issues. The basis of EADS is the identification and ranking of affinities or relationships that exist among the factors that influence job performance in the workplace. The five-step system can be applied to the workplace at varying levels of complexity based on need. It can be used at the design phase or in a redesign/modification application. Applicable for use in any work environment, the system can be an important part of the overall ergonomics process.     

Political Modernisation and Policy Arrangements: A Framework for Understanding Environmental Policy Change

Since its emergence in the early seventies, the environmental policy domain has substantially changed in terms of its content, organisation and instrumentation. Hitherto these changes have been studied primarily as strategic responses of the actors involved. This article aims to conceive recent changes in environmental policies in terms of political modernisation on the one hand, and in terms of the renewal of policy arrangements on the other. Political modernisation refers to structural processes of changing interrelations between state, market and civil society, and to new conceptions and practices of governance. Policy arrangements refer to the substance and the organisation of policy domains in terms of policy discourses, coalitions, rules of the game and resources. This analytical framework aims to do justice to policy dynamics caused by both strategic and structural factors. It therefore provides new perspectives on the understanding of recent changes in environmental policy and also proves to be helpful in improving those policies. Professor Bas Arts holds the chair of the Forest and Nature Conservation Policy Group at Wageningen University, the Netherlands. Professor Pieter Leroy holds the chair of the Department of Political Sciences of the Environment at Radboud University Nijmegen, the Netherlands. Dr. J.P.M. van Tatenhove is Associate Professor at the Environmental Policy Group of Wageningen University, the Netherlands.     

Inventory placement problems in dynamic supply chains

Summary  In this paper a basic model for analyzing the inventory placement problem in a supply chain is developed. The problem will be studied for a capacitated, multi-stage supply chain facing a continuous, stochastic demand for a single period for a single product — a specialty item with a very short selling season. The objective is to maximize the probability of achieving a set profit level. We prove that finding an optimal stock investment at the stages entails solving a mixed binary integer linear program. We characterize properties of the stock investment, examine two interesting cases where the stock investments have a simple structure, and develop a branch and bound approach for solving the more general case.

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Zusammenfassung  In diesem Beitrag wird ein Grundmodell entwickelt, um das Problem der Lagerplatzierung in einer Lieferkette analysieren zu k?nnen. Das Problem wird für eine kapazitierte mehrstufige Lieferkette untersucht, wobei unterstellt wird, dass es um die Nachfrage nach einem einzigen Produkt für eine einzige Periode (einen Sonderartikel mit sehr kurzer Verkaufszeit) geht und diese Nachfrage stetig und stochastisch ist. Unter diesen Bedingungen soll die Wahrscheinlichkeit maximiert werden, ein vorgegebenes Gewinnniveau zu erreichen. Die Suche nach der optimalen Vorratsinvestition auf den Stufen der Lieferkette führt zur Formulierung eines gemischten ganzzahligen linearen Programmierungsproblems mit Bin?rvariablen. Die Eigenschaften der Bevorratungsinvestition werden charakterisiert, zwei interessante F?lle mit einer einfachen Struktur der Bevorratungsinvestition untersucht und ein Branch-and-Bound-Ansatz zur L?sung eines allgemeineren Problemfalls entwickelt.

     

Demography of the Firm: A Useful Metaphor?

Demography of the firm is an interdisciplinaryresearch field of economics, sociology andeconomic geography. Although the name suggestsotherwise, demographic input has been limiteduntil recently. This article argues that thedemographic viewpoint may lead to added value.The metaphor is relevant, not because firms aresimilar to biological creatures (they are not),but because there are significant parallels inthe mechanisms of population change, as aresult of selective processes of birth anddeath, as well as aging and internal change ofincumbent firms. The nature of these changeprocesses at the micro level has to be studiedusing theories from other disciplines, such aseconomics, sociology and geography; a situationquite similar to that of human demography. Thearticle compares similarities and discrepanciesbetween the processes of birth and death infirm and human populations, as well as the mostimportant dimensions of population structureand change, e.g. age, period, and cohort. Amain difference is that in addition to thesefamiliar variables in human demography, firmsize and growth, and economic activity are alsomajor dimensions of the structure of firmpopulations. Because there are stronginteractions between these variables, anydemographic analysis, for instance to determinethe age curve of mortality, should also takeinto account these variables.     

Few and Far Between? An Environmental Equity Analysis of the Geographic Distribution of Hazardous Waste Generation

Objective. This article examines whether the generation of hazardous waste is concentrated in communities that are disproportionately minority or low income. Whereas much environmental equity research has focused on commercial facilities managing hazardous waste, facilities that generate and manage their own wastes—which account for over 98 percent of hazardous waste volume—have been ignored. Methods. The demographic characteristics were determined of people in geographic concentric rings around hazardous waste generators accounting for most of the country's 1997 hazardous waste volume. Results. My analyses indicate no tendency for disproportionately minority communities to be near these facilities. In fact, relatively few people are near where most hazardous waste is generated. Although a few of these facilities have large numbers of minority people around them, most are in areas with higher than average white populations. There was, however, a tendency for low-income communities to be near these facilities. Conclusions. To the extent that there are potential risks from the presence of hazardous waste at facilities, most of this risk is in relatively unpopulated areas. The presence of hazardous waste is not concentrated in areas that are disproportionately minority or low income.     

Comparing film and videotape

This review compares videotape and film to help the researcher choose the one most suited to the specific research problem. The review treats initial costs, running costs, resolution, required light levels, sound, color, processing, and data viewing. Half-inch videotape is the most versatile equipment, especially indoors. A motor-driven 35-mm camera is necessary when extreme resolution is required.     

Evaluating the quality of life in Belgium

This paper deals with the evaluation of social welfare inequalities in order to establish a qualitative growth model for Flanders. As a base for the enquiry, quantitative, objective result indicators are chosen. The various quantified components are dealt with separately and different methods of aggregation are discussed. 32 indicators are selected on the basis of a specific definition of social welfare and taking account of the difficulties of collecting certain information. The indicators are aggregated in three different ways and in two stages: first per component for each region and secondly per region. The results show that major variations in the components are weakened by the aggregation and further that the different aggregation methods lead to only small differences. As a general conclusion one can speak of a regional homogeneity in Belgium.