Productivity drift in extended learning curves

The pattern of changes in the Extended Learning Curves representing the performance of 114 assembly workers in an electronics firm is examined in terms of changes in productivity drift over long periods of time. It is shown that 2 types of discontinuities can occur. The first consists of a temporary levelling off in productivity followed by a recovery to new higher levels of productivity; the second has a sustained period of negative productivity drift. A number of work facets are statistically tested as possible causes of these patterns of productivity drift, but, the only significant relationship (at P ≤ 0.05 level) is with length of service in job. Some evidence is presented to show that conventional work measurement methods are not effective in terms of assessing the true work output of experienced workers since such workers are able to beat the system by claiming those allowances which are most difficult to cross-check.     

The Construction of Sexual Identities in an Online Gay,Lesbian, and Bisexual Bulletin Board System

An online bulletin board system was used to focus on how sexual minority gay, lesbian, and bisexual (GLB) individuals perceive and display their individual and collective sexual identities through textual and visual communication processes. While exploring sexual identity construction, four major themes emerged: “coming out,” separation, equality and civil rights, and misconceptions. Concepts of identity negotiation theory help to conceptualize the observed sexual identity construction processes. This work provides insight into how GLB individuals around the world perceive, construct, and perform their sexuality as well as how they perceive the majority culture as viewing them.     

Sun, sand, and citizenship: the marketing of gay tourism

This article investigates trends in the marketing of gay and lesbian tourism. It reviews gay and lesbian travel guides from the 1960s to the 1990s before examining more recent travel materials including brochures and Web sites promoting specific American cities. These promotional materials are a valuable object of inquiry because they are uniquely situated at the intersection of discussions of sexuality, the market, representation, space, and citizenship. Through an aggregate semiotic analysis and ideological criticism, this article examines themes and concerns raised by the recent wave of gay tourism marketing, including questions of visibility, privacy, and assimilation. I argue that while marketers' recent attempts to lure gay and lesbian tourists to specific destinations may seem to suggest increased tolerance and societal inclusion, the specific strategies that they employ actually reveal the second-class citizen status still experienced by gays and lesbians within the rest of American society.     

A production engineering approach to robot selection

The successful introduction of robots into an industrial enterprise means real commitment, engineering support, and detailed involvement in the planning of an integrated manufacturing system. In particular, the production engineer is clearly seen in this context to be the system designer. He must therefore be in a position to specify the performance of all man and machine components within the system such that productivity is maximised. Robot types are reviewed, and analogies between man and machine are used to introduce the RTM concept. Finally, a simple method is given for estimating robot throughput times from elementary velocity profiles. The fall-off in throughput due to the effect of many small robot movements is emphasised.     

Using innovation to address HIV, AIDS, and environment links: intervention case studies from Zimbabwe, Uganda, and Malawi

This article presents three cross-cutting intervention case studies that address HIV, AIDS, and natural resources management in an integrated manner through innovative programming in Zimbabwe, Uganda, and Malawi. In Zimbabwe, a religious-based non-governmental group and two community organizations work together to build skills of HIV- and AIDS-vulnerable children in rural areas to meet dietary and income needs, while using natural resources sustainably. In Uganda, various government agencies and NGO actors work together to improve the food security of HIV-affected households at the national, district, sub-district, and village levels. Finally, in Malawi, a conservation organization incorporates HIV and AIDS awareness and programming into its operations and projects. Each case study presents pioneering approaches to simultaneously addressing the pressures on conservation initiatives, food security/agricultural production, income generation/livelihoods, and social and health care systems. They also provide lessons for expanding interventions and partnerships.