Venkat R. Kota, Don Taylor and Kevin R. Gue
Puzzle-based storage is a novel approach enabling very dense storage. Previous analytical studies have focussed on retrieval time when one or more usable escort locations (empty…
Abstract
Purpose
Puzzle-based storage is a novel approach enabling very dense storage. Previous analytical studies have focussed on retrieval time when one or more usable escort locations (empty slots) are located near the system input/output location, and on simulation results for more complex situations. The purpose of this paper is to extend analytical results to determine retrieval time performance when multiple escorts are randomly located within the system.
Design/methodology/approach
Closed-form expressions for retrieval time are developed and proven for cases in which the number of free, randomly placed escorts is equal to one or two. Heuristics with associated worst case bounds are proposed for larger numbers of free escorts.
Findings
Puzzle-based storage systems are practical and viable ways to achieve storage density, but retrieval time is heavily dependent upon suitable use of escort locations. Analytical and heuristic methods developed within the paper provide worst-case retrieval time performance in a variety of settings.
Research limitations/implications
As the number of free, randomly located escorts increases, optimal analytical solutions are difficult to obtain. Heuristics provide viable retrieval strategies in these situations, and worst-case bounds are relatively easily developed.
Originality/value
The primarily contribution of this paper is to make theoretical extensions of optimal methods for puzzle-based storage systems. It motivates additional research in multiple-escort systems and provides insights that should prove useful for the development of 3-dimensional puzzle-based systems and for systems in which concurrent item movement is permitted.
Details
Keywords
Rachel Ashworth, Tom Entwistle, Julian Gould‐Williams and Michael Marinetto
This monograph contains abstracts from the 2005 Employment Research Unit Annual Conference Cardiff Business School,Cardiff University, 6‐7th September 2005
Abstract
This monograph contains abstracts from the 2005 Employment Research Unit Annual Conference Cardiff Business School, Cardiff University, 6‐7th September 2005
Details
Keywords
Through a survey of 200 employees working in five of the thirty establishments analysed in previous research about the microeconomic effects of reducing the working time (Cahier…
Abstract
Through a survey of 200 employees working in five of the thirty establishments analysed in previous research about the microeconomic effects of reducing the working time (Cahier 25), the consequences on employees of such a reduction can be assessed; and relevant attitudes and aspirations better known.
This paper reviews experience with credit union demutualisation to date in the light of increasing discussion about whether demutualisation is a likely (or inevitable) future…
Abstract
This paper reviews experience with credit union demutualisation to date in the light of increasing discussion about whether demutualisation is a likely (or inevitable) future stage in the evolutionary process. It is argued that the credit union industry faces an inherent demutualisation bias which emerges as the sector develops maturity. Contributing factors include the emergence of professional management pursuing personal objectives, together with the economic realities of technological change, financial liberalisation, increased competition, and prudential regulation based on minimum capital requirements. Demutualisation incentives may partially reflect the unsuitability of the mutual form of governance in larger, more sophisticated financial institutions, but there is also a significant risk of demutualisation based on wealth expropriation motives. Alternative policies and strategies which might avoid this demutualisation bias are examined.
Details
Keywords
“Consumerism”, for want of a better description, is given to the mass of statutory control (which shows no sign of declining) of standards, trading justice to the consumer, means…
Abstract
“Consumerism”, for want of a better description, is given to the mass of statutory control (which shows no sign of declining) of standards, trading justice to the consumer, means of redress to those who have been misled and defrauded, advice to those in doubt; and to the widespread movement, mostly in the Western world, to achieve these ends.
The debate about in equality has concentrated on trade and/or technology as potential explanations. This paper argues that openness or globalisation in general, instead of the…
Abstract
The debate about in equality has concentrated on trade and/or technology as potential explanations. This paper argues that openness or globalisation in general, instead of the narrow definition of trade, is an important component missing from the discussion about in equality trends. To be specific, openness allows firms to increase their fallback position by presenting a credible threat of relocation. Firms do not have to actually relocate; they just have to present a credible threat to undermine worker’s welfare. This area of research, currently underdeveloped, could potentially improve our discussion about in equality.
Details
Keywords
Reviews previous research on the effects of CEO compensation structure, outlines the criteria for relative performance evaluation (RPE) and notes the paucity of empirical evidence…
Abstract
Reviews previous research on the effects of CEO compensation structure, outlines the criteria for relative performance evaluation (RPE) and notes the paucity of empirical evidence to support it. Reports a study of the use of RPE for US bank CEO compensation 1976‐1988; and its relationship to shareholder, market and industry returns. Explains the methodology and presents the results, which suggest that CEO pay is positively linked to firm performance, but negatively linked to market/industry performance; and that performance is positively linked to CEO option wealth. Adds that both the pay/performance link and the use of RPE increased after bank deregulation in the early 1980s. Considers consistency with other research and concludes that the reduction in compensation risk offered by RPE should reduce compensation cost and thus provide a good reason for the banking industry to increase its use.
Details
Keywords
Presents a special issue, enlisting the help of the author’s students and colleagues, focusing on age, sex, colour and disability discrimination in America. Breaks the evidence…
Abstract
Presents a special issue, enlisting the help of the author’s students and colleagues, focusing on age, sex, colour and disability discrimination in America. Breaks the evidence down into manageable chunks, covering: age discrimination in the workplace; discrimination against African‐Americans; sex discrimination in the workplace; same sex sexual harassment; how to investigate and prove disability discrimination; sexual harassment in the military; when the main US job‐discrimination law applies to small companies; how to investigate and prove racial discrimination; developments concerning race discrimination in the workplace; developments concerning the Equal Pay Act; developments concerning discrimination against workers with HIV or AIDS; developments concerning discrimination based on refusal of family care leave; developments concerning discrimination against gay or lesbian employees; developments concerning discrimination based on colour; how to investigate and prove discrimination concerning based on colour; developments concerning the Equal Pay Act; using statistics in employment discrimination cases; race discrimination in the workplace; developments concerning gender discrimination in the workplace; discrimination in Japanese organizations in America; discrimination in the entertainment industry; discrimination in the utility industry; understanding and effectively managing national origin discrimination; how to investigate and prove hiring discrimination based on colour; and, finally, how to investigate sexual harassment in the workplace.
Details
Keywords
Dorothy Nelkin and Mark Michaels
Looks at the contemporary debate on US immigration, focusing particularly on the increasing articulation of eugenics. Notes that, at times of economic and moral crisis, biological…
Abstract
Looks at the contemporary debate on US immigration, focusing particularly on the increasing articulation of eugenics. Notes that, at times of economic and moral crisis, biological generalizations tend to resurface to provide support for the existing system of privilege and rights, and that the information superhighway provides the perfect vehicle for rapidly spreading beliefs and information. Addresses three specific issues – the genetically determined traits and behaviours of specific racial groups, culture as an expression of biological characteristics, and immigration destroying the racial purity of American society. Outlines briefly US history of immigration. Airs the current concerns on US immigration – pinpointing that concern lies not in immigration per se., which has declined in the last decade, but in the changing national origin of new immigrants, that is immigrants are now mainly Latin American or Asian, which is seen as a threat to Anglo‐Saxon hegemony. Refers to the work of the Pioneer Fund, exploring human variation through the racial basis of intelligence and propensity to violence and/or crime. Claims that scientific language has been adapted to reinforce worries about immigration reducing the supremacy of America’s culture.
Details
Keywords
Globalisation is generally defined as the “denationalisation of clusters of political, economic, and social activities” that destabilize the ability of the sovereign State to…
Abstract
Globalisation is generally defined as the “denationalisation of clusters of political, economic, and social activities” that destabilize the ability of the sovereign State to control activities on its territory, due to the rising need to find solutions for universal problems, like the pollution of the environment, on an international level. Globalisation is a complex, forceful legal and social process that take place within an integrated whole with out regard to geographical boundaries. Globalisation thus differs from international activities, which arise between and among States, and it differs from multinational activities that occur in more than one nation‐State. This does not mean that countries are not involved in the sociolegal dynamics that those transboundary process trigger. In a sense, the movements triggered by global processes promote greater economic interdependence among countries. Globalisation can be traced back to the depression preceding World War II and globalisation at that time included spreading of the capitalist economic system as a means of getting access to extended markets. The first step was to create sufficient export surplus to maintain full employment in the capitalist world and secondly establishing a globalized economy where the planet would be united in peace and wealth. The idea of interdependence among quite separate and distinct countries is a very important part of talks on globalisation and a significant side of today’s global political economy.