3,016 research outputs found
The Role of Evidence in Establishing Trust in Repositories
No full textThis article arises from work by the Digital Curation Centre (DCC) Working Group examining mechanisms to roll out audit and certification services for digital repositories in the United Kingdom. Our attempt to develop a program for applying audit and certification processes and tools took as its starting point the RLG-NARA Audit Checklist for Certifying Digital Repositories. Our intention was to appraise critically the checklist and conceive a means of applying its mechanics within a diverse range of repository environments. We were struck by the realization that while a great deal of effort has been invested in determining the characteristics of a 'trusted digital repository', far less effort has concentrated on the ways in which the presence of the attributes can be demonstrated and their qualities measured. With this in mind we sought to explore the role of evidence within the certification process, and to identify examples of the types of evidence (e.g., documentary, observational, and testimonial) that might be desirable during the course of a repository audit.
The Demand for M1 in the USA: A Reply.
No full textUsing general to simple methods, J. M. Boughton (1993) develops an econometric model that fits almost as well as Y. Baba, D. F. Hendry, and R. M. Starr (BHS) (1992) but differs in economic implications and dynamic adjustments. He claims the new model is constant, is not encompassed by BHS, but does not encompass BHS. He concludes that the new variables in BHS do not matter for fit or constancy. The authors replicate Boughton's findings but their simplification encompassing test confirms the importance of the novel variables in BHS and shows that BHS encompasses his model. An explanation is offered for its constancy when previous studies suffered predictive failure
The Demand for M1 in the USA: A Reply.
No full textUsing general to simple methods, J. M. Boughton (1993) develops an econometric model that fits almost as well as Y. Baba, D. F. Hendry, and R. M. Starr (BHS) (1992) but differs in economic implications and dynamic adjustments. He claims the new model is constant, is not encompassed by BHS, but does not encompass BHS. He concludes that the new variables in BHS do not matter for fit or constancy. The authors replicate Boughton's findings but their simplification encompassing test confirms the importance of the novel variables in BHS and shows that BHS encompasses his model. An explanation is offered for its constancy when previous studies suffered predictive failure. Copyright 1993 by Royal Economic Society.
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
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Lectures on the Theory of Competitive Equilibrium
No full textSummaries by Nobel laureate Kenneth J. Arrow of his 1962 lectures on general equilibrium theory at Northwestern University. These summaries were widely circulated but unpublished. Reissued here, edited with updated notation. With permission of the Arrow family
Starr, Ross Edgar (Death, 1908-04-08)
No full textAddress: 2750 Hoff Ave.Age at death: 10 mo. 7da.174/Pg 46/1908/M C/Single/Cinti/W. L. Brodberger, M. D./W. A. Watkins/Newtown Cem.Original record filed in drawer labeled 'STAHL-STEFFEE'
Web 2.0: Hypertext by Any Other Name?
No full textWeb 2.0 is the popular name of a new generation of Web applications, sites and companies that emphasis openness, community and interaction. Examples include technologies such as Blogs and Wikis, and sites such as Flickr. In this paper we compare these next generation tools to the aspirations of the early Hypertext pioneers to see if their aims have finally been realized
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Why is there Money? Convergence to a Monetary Equilibrium in a General Equilibrium Model with Transaction Costs
No full textThis paper presents a class of examples where a nonmonetary economy converges in a tatonnement process to a monetary equilibrium. Exchange takes place in organized markets characterized by an array of trading posts where each pair of goods may be traded for one another. A barter equilibrium with m commodities is characterized by m(m-1)/2 commodity pair trading posts, most of which host active trade. A monetary equilibrium with unique money is characterized by active trade concentrated on m-1 posts, those trading in 'money' versus the m-1 nonmonetary commodities. There are two distinct sources of monetization: absence of double coincidence of wants and scale economies in transaction costs. As households discover that some pairwise markets (those dealing in the 'natural' money or those with high trading volumes) have lower transaction costs, they restructure their trades to take advantage of the low cost. Use of media of exchange arises endogenously from their low transaction cost. Uniqueness of the medium of exchange in equilibrium results from scale economies in the transaction technology
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