Blockchain Papers

Jeffrey L. Elman

No abstract is available for this record.

Lance Fortnow

No abstract is available for this record.

Igor Sheiman

No abstract is available for this record.

Suresh M. Joshi, P. MAGHAMI, Atul Kelkar

Control system design is considered for attitude control and vibration suppression of flexible space structures. The problem addressed is that of controlling both the zero-frequency rigid-body modes and the elastic modes. Model-based compensators, which employ observers tuned to the plant parameters, are first investigated. Such compensators are shown to generally exhibit high sensitivity to the knowledge of the parameters, especially the elastic mode frequencies. To overcome this problem a class of dynamic dissipative compensators is next proposed, which robustly stabilize the plant in the presence of unmodeled dynamics and parametric uncertainties. An analytical proof of robust stability is given, and a method of implementing the controller as a strictly proper compensator is given. Methods of designing such controllers to obtain optimal performance and robust stability are presented. Numerical and experimental results of application of the methods are presented, which indicate that dynamic dissipative controllers can simultaneously provide excellent performance and robustness.

C. Fidge

No abstract is available for this record.

Bonnie Mowinski Jennings, Margaret L. McClure

To contain the escalating cost of health care, a prospective payment system is being introduced into the military. The authors propose a proactive approach to this change in health care financing by evaluating the experiences of nurses to a similar change in the civilian sector. These approaches are presented as nine interrelated lessons: responding optimistically; shifting into a business mode; valuing clinical nursing experts; understanding the implications for documentation; moving to decentralized management; changing outpatient care delivery; considering the effects on job satisfaction; evaluating the relationship between costs and nursing resource consumption; and basing nursing practice in science.

William Aiello, Johan Håstad

No abstract is available for this record.

James D. Bentley, J Chusid, G D'Antuono, Joyce V. Kelly · 5 authors

The contemporary academic medical center is a complex organization providing medical and other professional health education, biomedical and behavioral research, and a comprehensive range of patient care services. This paper presents data from the Association of American Medical Colleges' 1989 survey of 125 member faculty practice plans. The survey data showed that 62% of the 74 responding plans were units or associations within the medical school corporate structure. Plans were organized along a broad continuum from the autonomous, departmental model with decentralized governance and management to the group model with centralized governance and management. The growth of managed care, increased competition, and a greater reliance by the medical school on clinical practice income as a financing source are causing the practice plan to expand beyond billing of professional fees. The survey data showed that 75% of the practice plans operated satellite centers, and 61% planned to build new ambulatory care facilities in order to expand and improve services to patients. The practice plans also have adapted to changes in third-party reimbursement and are establishing mechanisms to negotiate managed care contracts involving multiple clinical departments to increase referrals and maintain patient shares; 86% of the plans participate in at least one managed-care organization. The role of the practice plan will continue to evolve in response to the needs of the academic medical center for a cooperative and supportive environment in which to conduct its traditional missions of teaching, research, and patient care.

Werner Nahm

No abstract is available for this record.

Alexander Telyukov

A conceptual framework and a blueprint of the health-financing reform have been proposed to the Soviet Parliament by a group of economists and health policy analysts. The draft law offers a new pattern of health financing that is expected to increase both the volume and quality of medical care through raising additional funds, decentralizing health policies and management, providing medical facilities with higher motivation for productive and cost-effective performance, and creating economic incentives for employees and individuals for better labor conditions, pollution abatement, and healthy lifestyles.

Oded Goldreich, Silvio Micali, Avi Wigderson

In this paper the generality and wide applicability of Zero-knowledge proofs, a notion introduced by Goldwasser, Micali, and Rackoff is demonstrated. These are probabilistic and interactive proofs that, for the members of a language, efficiently demonstrate membership in the language without conveying any additional knowledge. All previously known zero-knowledge proofs were only for number-theoretic languages in NP fl CONP. Under the assumption that secure encryption functions exist or by using "physical means for hiding information," it is shown that all languages in NP have zero-knowledge proofs. Loosely speaking, it is possible to demonstrate that a CNF formula is satisfiable without revealing any other property of the formula, in particular, without yielding neither a

Kaoru Kurosawa, Tatsuaki Okamoto

No abstract is available for this record.

H.-P. Hübner, S. Drost

No abstract is available for this record.

Steven A. Sharpe

No abstract is available for this record.

Günter Franke

No abstract is available for this record.

Robert H. Freilich, S M White

Increasingly, a volatile public policy issue in rapidly growing areas is traffic congestion. The sprawl of suburban growth, decentralization of urban centers and the shift of jobs from urban centers to suburban areas contributes to traffic congestion. Traditionally, government's response to traffic congestion has been to use engineering, public finance and regulatory control to design and build new highway systems or expand exiting ones. The authors suggest instead that state and local governments use a combination of techniques to better manage land use applications and explore public finance alternatives to achieve a better balance between travel demand, transportation capacity and environmental concerns.

William Aiello, Johan Håstad

No abstract is available for this record.

Lance Betros

This monograph examines the adequacy of the joint task force (JTF) to operate effectively in the context of wartime uncertainty. Military theorists have long understood the deleterious effects of uncertainty on the conduct of war. Commanders never know as much about the enemy or environmental conditions as they would like, so they decide and act on the best information available, however incomplete. In coping with uncertainty, there are proven methods of structuring one's organization to meliorate its effects. These methods involve decentralizing command, lowering decision thresholds, and creating self-contained, semi-autonomous units. U.S. military doctrine recognizes the need for JTFs in responding to the global commitments of the nation. Unfortunately, Service incompatibilities and parochialism often have hampered the joint commander's ability to get the job done. Congress mandated reform through the Goldwater-Nichols Department of Defense Reorganization Act of 1986; the result has been to streamline joint command structures, thus making them better able to deal with uncertainty. The experience of multi-Service operations during World War II confirms the wisdom of creating joint task forces when doctrinal conditions are met. My research into two of these operations -- FLINTLOCK in the Marshall Islands and HUSKY in Sicily – indicate that an integrated joint command structure, akin to a modern JTF, reduces the effects of uncertainty by allowing the central headquarters to operate with less information.

Larry N. Lewis, Richard J. Uriarte, Nathan Lewis

No abstract is available for this record.

Mikko Puhakka, Randall Wright

The authors study an economy where externalities provide an explicit role for intervention and technology shocks generate aggregate uncertainty. In laissez-faire there is too much unemployment. However, the authors show how to support the optimal allocation as a decentralized equilibrium using a self-financing linear employment subsidy. Generally, this subsidy is a function of economic conditions, and they characterize the way in which it varies with the shock. A special case of the authors' results indicates that a simple restriction on technology, homotheticity, implies the optimal subsidy is constant or independent of unemployment. Copyright 1991 by Economics Department of the University of Pennsylvania and the Osaka University Institute of Social and Economic Research Association.

Klaus Conrad

The purpose of this paper is to compare the performance of some instruments of environmental policy, using data for a coal-fired power plant. Each decentralized scheme coverages towards the social optimum, chosen by a regulator. We look at the performance of a changing tax rate on emission, of an announcement of the tax formula, of an announcement of the tax formula with a tax refund possibility, and of a tax-cum subsidy scheme. Our emphasis is on full information concerning the tax and subsidy formulas and on the opportunity for the firm to optimize intertemporally. We also test two performance schemes which combine social optimal pricing with optimal abatement decisions. Our interest is to compare the speed of convergence of the schemes, the monetary side payments (subsidy, bonus) required, and to look for self-financing schemes.

E. de Souza e Silva, M. Gerla

No abstract is available for this record.

Wolfgang Peters

No abstract is available for this record.

Gene M. Grossman, Elhanan Helpman

No abstract is available for this record.