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Nonemployer firms—firms with no employees—present themselves as larger, more stable firms to take on clients’ projects. They then achieve these projects by recruiting subcontractors, guiding subcontractors’ interactions with clients, and coordinating subcontractors to protect their team performance for the client. Using fourth-generation activity theory, I examine how these firms stage-manage their ad hoc collaborations. I conclude by describing the implications for further developing fourth-generation activity theory to study such instances of knowledge work.  相似文献   
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We describe six hallmarks of high quality service-learning and explain how these considerations guided the development of a Transitional Coaching Program (TCP) during the first three years of implementation. We have demonstrated that the TCP is acceptable, feasible, and sustainable. Improvements have been seen in the degree of impact on learning objectives, but statistically significant change has not yet been achieved. This project highlights the importance of looking beyond satisfaction and engaging in rigorous assessment of learning objectives and ongoing quality improvement through attention to best practices and evidence-based, continuous quality improvement.  相似文献   
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The debate in the UK about the continued existence of the honours degree classification led to a survey of the assessment regulations in 35 varied higher education institutions. This revealed considerable variation in the way in which honours degree classifications are determined, and also in the handling of weak performances by students. Such variability, deriving from a system in which institutional autonomy is to the fore, raises a question about equitability in the treatment of students. A brief allusion is made to the variability in assessment regulations in the US and Australia.  相似文献   
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Traditional methods for task analysis and training design, such as those embodied in Instructional Systems Development (ISD), decompose jobs into discrete tasks composed of specific action sequences and identify prerequisite knowledge and skills for each task. Although these methods have been effective for designing training for simple procedural skills, they offer little insight for analysis or training of jobs involving complex cognitive skills, which increasingly require training today. Because of this, cognitive considerations need to be incorporated into ISD, particularly in the task analysis phase. Recently, cognitive methods have begun to be used to conduct task analysis for training program development and human-computer system development. In this article, recent developments in cognitive task analysis are reviewed, and The Integrated Task Analysis Model (ITAM), a framework for integrating cognitive and behavioral task analysis methods within the ISD model, is presented. Discussed in detail are ITAM's three analysis stages—progressive cycles of data collection, analysis, and decision making—in three components of expertise: skills, knowledge, and mental models. This research was supported in part by the U.S. Air Force Armstrong Laboratory, Human Resources Directorate, Operational Training Division. The views contained herein are solely those of the authors and do not necessarily reflect the views of the U.S. Air Force or the Department of Defense. Both authors contributed equally to this article. Joan M. Ryder is with CHI Systems, Inc. Richard E. Redding is with Human Technology, Inc. Drs. Bernell Edwards and Thomas Killion were the technical monitors and provided valuable guidance. The authors thank John Cannon, Sharon Fisher, Wayne Zachary, and the participants of an AL/HR Workshop on Cognitive Skills Acquisition for helpful comments.  相似文献   
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Book Review     
Fei‐I Lu, History of Taiwanese Cinema: Politics, Economics &; Aesthetics (1949–1994) (in Chinese). Taipei: Yuan Liou Publishing, 1998.  相似文献   
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Abstract

The aim of this study was to assess and compare the validity of the portable VmaxST telemetry metabolic measurement device with that of a standard measurement system (Vmax29). Thirty asymptomatic, moderately active males provided written, informed consent and completed two maximal graded treadmill exercise tests (Bruce) using the VmaxST and the Vmax29 metabolic measurement systems. Tests were performed in random order on separate days to obtain peak values for time to exhaustion, heart rate, systolic and diastolic blood pressure, oxygen consumption ([Vdot]O2), carbon dioxide production ([Vdot]CO2), ventilation ([Vdot] E), and respiratory exchange ratio (RER). Multivariate analysis of variance revealed no significant main effect (P = 0.88) between the two systems across any variable, suggesting similar measurement capabilities between the two systems. Linear regression analyses revealed moderate to high coefficients of determination for [Vdot]O2 (r 2 = 0.99), [Vdot]CO2 (r 2 = 0.99), [Vdot] E (r 2 = 0.99), and RER (r 2 = 0.89). Furthermore, Bland-Altman analyses demonstrated that the VmaxST yielded similar values to the Vmax29, suggesting good agreement between the two systems. Agreement was confirmed when the differences between the methods resulted in a small range as identified by the 95% limits of agreement. Findings from the current study confirm that the VmaxST is a valid device for measuring metabolic and physiological variables during exercise within a controlled laboratory setting.  相似文献   
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