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92,314 results · page 3830 of 3,847

Jan 1, 1990·Institutional Repositories DataBase (IRDB)
0 cites
4-move zero-knowledge interactive proof systems

馨 黒澤, Kaoru Kurosawa, わかは 尾形, Wakaha Ogata · 8 authors

No abstract is available for this record.

Logic, programming, and type systems
Distributed systems and fault tolerance
Formal Methods in Verification
Original source
Jan 1, 1990·Ciudad y territorio: Revista de ciencia urbana
0 cites
Los significados urbanos y arquitectónicos enla evolución de la ciudad hispano-andina

Alfredo Lozano Castro

espanolDiversos estudios, ensayos, discursos, trabajos, etc., sobre la «ciudad hispanoamericana», concuerdan que la fundacion de ciudades en America represento algo asi como la implantacion de una forma de vida civilizada en los pueblos nativos indigenas, convirtiendose dicho acontecimiento en una de las aportaciones culturales del viejo al nuevo continente. Este criterio, que sostienen en la actualidad algunos sectores del pensamiento iberoamericano, plantea algunos interrogantes: ?Ha sido verificado este criterio en la realidad geografica del vasto territorio americano con el detenimiento indispensable para llegar a conclusiones ciertas? ?Responde este criterio a la realidad de los conocimientos alcanzados por las civilizaciones prehispanas y en particular la civilizacion andina representada en su ultima fase de evolucion autarquica por la cultura inca? ?Tenia dicha cultura una forma de organizacion territorial? Este articulo intenta desde nuestra propia experiencia ofrecer respuestas partiendo del analisis de un caso particular, Ias ciudades hispanoandinas del Ecuador. EnglishA host of studies, papers, speeches, theses and what you will on-The Spanish-American City» seem to agree that the founding of these answered something akin to a wish to set up forms of civilized life amongst the native population and that thus these represent a cultural gift of the Old to the New World. Though this idea has been taken up by certain sectors of Ibero-American thinking of Iate, one or two doubts as to its validity could still be raised, or so the paper claims. Has it in fact ever been put to the proof in terms of the immensity of the americas in such a way that such an examination could offer some hard and fast conclusions, we are asked? Does it answer to that stake of affairs that our knowledge of pre-hispanic civilizations allows us now to understand? this mos especially when considering the andine culture as then bodied forth in the last flowering of Inca cultures evolution in autarchy. Was this culture orgainized in a territorial way? The paper, based as it is on the author's own experience, offers answers to these questions that take the Hispano-Andine cities of Equador as their touch stones.

Regional Development and Innovation
Latin American Urban Studies
Original source
Jan 1, 1990·Educational Evaluation and Policy Analysis
14 cites
Education Fiscal Policy in the Reagan Administration

Deborah A. Verstegen

The Reagan administration’s “New Federalism” agenda focused on redirecting national priorities and decentralizing domestic programs through budgetary policy. This research analyzes the consequences of national policy shifts occurring over the decade of the 1980s for public education. Utilizing a multimethod research design, it addresses four fundamental questions: (a) What have been the federal investments in education during the Reagan years? (b) How has the overall Department of Education (ED) budget fared over this time? (c) How have individual programs in ED been affected? (d) In sum, what fiscal changes have occurred in education during the Reagan presidency and to what extent have devolution and diminution in federal education policy been influenced by the Administration’s policies? The author finds significant shifts have occurred in federal education policy and finance during the 1980s. Tax reductions, deficit financing, dwindling productivity, and an uncertain economic outlook indirectly accomplished what could not be otherwise achieved, and set the basis for a new era in national education policy and finance well beyond the Reagan years.

2 source records
School Choice and Performance
Fiscal Policies and Political Economy
Local Government Finance and Decentralization
Original source
Jan 1, 1990
2 cites
Zero-Knowledge With Finite State Verifiers (Extended Abstract)

Cynthia Dwork, Larry Stockmeyer

We initiate an investigation of interactive proof systems (IPS'S) and zero knowledge interactive proof systems where the verifier is a %way probabilistic finite state automaton (2pfa). Among other results, we show: 1. There is a class of 2pfa verifiers and a language L such that L has a zero knowledge IPS with respect to this class of verifiers, and L cannot be recognized by any verifier in the class on its own; 2. There is a language L such that L has an IPS with 2pfa verifiers but L has no zero knowledge IPS with 2pfa verifiers.

Cryptography and Data Security
Logic, Reasoning, and Knowledge
Complexity and Algorithms in Graphs
Original source
Jan 1, 1990·Lecture notes in computer science
101 cites
A Modification of the Fiat-Shamir Scheme

Kazuo Ohta, Tatsuaki Okamoto

No abstract is available for this record.

Open access
Cryptography and Data Security
Complexity and Algorithms in Graphs
Cryptography and Residue Arithmetic
Original source
Jan 1, 1990·Health Policy and Planning
35 cites
Evolution of primary health care in Thailand: what policies worked?

Sanguan Nitayarumphong

Thailand has a long history of primary health care (PHC) development which started before the Declaration of Alma Ata in 1978. The National PHC programme was implemented nation-wide as part of the Fourth National Health Development Plan (1977–1981) focusing on the training of ‘grass-root’ PHC workers consisting of village health communicators and village health volunteers. Since then PHC has evolved through many innovative health activities: community organization, community self-financing and management, the restructuring of the health system and multisectoral co-ordination. Many of the essential elements of PHC have been achieved. Improvements in the nutritional status of children under five households accessiblity to clean water, immunization coverage, and the availablity of essential drugs have been observed. PHC has been successful in Thailand because of community involvement in health, collaboration between govermment and non-govermment organizations, the integration of the PHC programme, the decentralization of planning and management, intersectors collaboration at operational levels, resource allocation in favour of PHC, the management and continuous supervision of the PHC programme from the national down to the district level, and the horizontal teaining of villagers to villagers.

Healthcare Systems and Reforms
Global Maternal and Child Health
Original source
Jan 1, 1990·International Journal of Public Administration
1 cites
State and local finance in a command economy: the case of the soviet union

Robert H. Aten

Two aspects of Western public finance, the economic theory of federalism and public choice theory, have insights that, if adopted in the Soviet Union, could help improve its resource allocation to permit economic growth, mitigate the problems it has with its minorities, and aid the transition away from a centralized, Communist-Party-dominated State and society. The economic reforms proposed by Chairman Mikhail Gorbachev are briefly summarized and criticized in the context of a summary discussion of governmental decisionmaking in the Soviet Union. Lessons are identified from the U.S. historical experience that suggest certain steps to improve local government as necessary preconditions for improving Soviet economic efficiency. These are free local elections, a free local press, an independent judiciary with real authority to protect the integrity of the press and local elections, real decentralization of political power to the regions, steps toward equalization of fiscal capacity among the regions, increased citizen mobility, and adoption of actions to provide incentives for Western investment in local government capital formation. This last precondition requires a convertible currency. (To achieve a convertable currency may require other economic and political changes that are beyond the scope of this paper.) Aspects of the paper rely on information publically available through mid-1989.

Fiscal Policy and Economic Growth
Local Government Finance and Decentralization
Fiscal Policies and Political Economy
Original source
Jan 1, 1990·The Business History Review
27 cites
What Have Lawyers Done For American Business? The Case of Baker & Botts of Houston

Kenneth Lipartito

Although lawyers made crucial contributions to the development of business, scholars have said little about their role. As the following article explains, lawyers fought restrictions on business growth, worked to make laws uniform, and helped to establish legal rules in the areas of corporate reorganization, finance, and regulation. Pioneering a new type of organization—the large firm—they moved beyond the realm of legal doctrine and acquired the political influence, local knowledge, and community connections needed to reform the nation's decentralized legal system in ways that fit the demands of national-scale business.

American History and Culture
Occupational and Professional Licensing Regulation
Law, Economics, and Judicial Systems
Original source
Jan 1, 1990·TUbilio (Technical University of Darmstadt)
0 cites
Zur Theorie der Zero Knowledge Proofs

Wellner, Ingrid

No abstract is available for this record.

Hermeneutics and Narrative Identity
Aging, Elder Care, and Social Issues
Health, Medicine and Society
Original source
Jan 1, 1990
94 cites
Perfect zero-knowledge in constant rounds

Mihir Bellare, Silvio Micali, Rafail Ostrovsky

Quadratic residuosity and graph isomorphism are classic problems and the canonical examples of zero-knowledge languages. However, despite much research effort, all previous zero-knowledge proofs for them required either unproven complexity assumptions or an unbounded number of rounds of message exchange.

Open access
Cryptography and Data Security
Complexity and Algorithms in Graphs
Computability, Logic, AI Algorithms
Original source
Jan 1, 1990
1,090 cites
Public-key cryptosystems provably secure against chosen ciphertext attacks

Moni Naor, Moti Yung

We show how to construct a public-key cryptosystem (as originally defined by DiNe and Hellman) secure against chosen ciphertezt attacks, given a public-key cryptosystern secure against passive eavesdropping and a noninteractive zero-knowledge proof system in the shared string model. No such secure cryptosystems were known before. A concrete implementation can be based on quadratic residuosity intractability.

Open access
Cryptography and Data Security
Cryptographic Implementations and Security
Cryptography and Residue Arithmetic
Original source
Jan 1, 1990·Lecture notes in computer science
191 cites
Everything Provable is Provable in Zero-Knowledge

Michael Ben-Or, Oded Goldreich, Shafi Goldwasser, Johan Håstad · 7 authors

No abstract is available for this record.

Cryptography and Data Security
Privacy-Preserving Technologies in Data
Complexity and Algorithms in Graphs
Original source