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5th International Workshop on Fast Software Encryption, FSE 1998

作者： Knudsen, Lars R. Rijmen, Vincent Rivest, Ronald L. Robshaw, Matthew J. B. Dept. of Informatics University of Bergen Hi-techcenter BergenN-5020 Norway K.U. Leuven ESAT Kardinaal Mercierlaan 94 HeverleeB-3001 Belgium M.I.T. Laboratory for Computer Science 545 Technology Square CambridgeMA02139 United States RSA Laboratories 100 Marine Parkway Redwood CityCA94065 United States

The block cipher RC2 was designed in 1989 by Ron Rivest for RSA Data Security Inc. In this paper we describe both the cipher and preliminary attempts to use both differential and linear cryptanalysis. © Springer-... 详细信息

ISBN: (纸本)354064265X

关键词： Cryptography

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Delay analysis for real-time and non real-time traffic streams under a priority cell scheduling

Delay analysis for real-time and non real-time traffic strea...

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IEEE Conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： F. Ishizaki T. Takine Y. Oie Dept. of Inf. Sci. & Intelligent Syst. Tokushima Univ. Japan Department of Applied Mathematics and Physics Graduate School of Informatics Kyoto University Kyoto Japan Department of Computer Science and Electronics Kyushu Institute of Technology Faculty of Computer Science Iizuka Japan

We consider a priority cell scheduling in the following scenario. High-speed cell networks accommodate constant bit rate (CBR) streams from real-time sources and unspecified bit rate (UBR) streams from non real-time sources. The real-time traffic requires guarantees of its delay time. On the other hand, the non real-time traffic is relatively tolerable to its delay time. We obtain the queueing delay distribution of cells from CBR streams. Further the average queueing delay of cells from UBR streams is obtained in some special cases. We provide some numerical results and discuss the effectiveness of quality-of-service (QoS) guarantees based on the statistical bound and the influence of UBR streams on the system performance.

关键词： Traffic control Processor scheduling Telecommunication traffic Delay effects Bit rate Switches Quality of service System performance High-speed networks Intelligent systems

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Innovations in electronic academic publishing

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IEEE Intelligent Systems and Their Applications 1998年第1期13卷 6-7页

作者： Hearst, Marti A. Wellman, Michael P. Minton, Steve Sim, Ida Lesk, Michael University of California Berkeley CA United States University of Michigan Dept. of Elec. Eng. and Comp. Sci. AI Lab MIT American Association for AI American Economic Association Assoc. for Comp. Mach. and Informs AI Laboratory University of Michigan 1101 Beal Ave. Ann Arbor MI 48109-2110 United States USC's Information Sciences Institute USC Computer Science Department Carnegie Mellon University AAAI ACM Information Sciences Inst. Univ. of Southern California 4676 Admiralty Way Marina del Rey CA 90292 United States Department of Medicine University of California San Francisco CA United States Stanford University Stanford Univ. School of Medicine Amer. Med. Informatics Association American College of Physicians Society for Medical Decision Making Dept. of Medicine Univ. of California San Francisco 400 Parnassus Ave. A-405 San Francisco CA 94143-0320 United States Div. of Info. and Intelligent Syst. National Science Foundation University College London Department of Computer Science NSF 4201 Wilson Blvd. Arlington VA 22230 United States

Examines three different innovations in electronic academic publishing of interest to practitioners in the field of intelligent systems: (1) JAIR (The Journal of Artificial Intelligence Research)-an electronic journal by and for the AI research community; (2) medical publishing and AI; and (3) how can we get high-quality electronic journals?.

关键词： Technological innovation Costs Intelligent systems biomedical imaging Medical diagnostic imaging Subscriptions Electronic publishing Medical services Software libraries Artificial intelligence

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Royal Academy of Medicine in Ireland - Section of Bioengineering - Proceedings of meeting held in Dundalk, Co. Louth, in February 1998.

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IRISH JOURNAL OF MEDICAL science 1998年第4期167卷 256-276页

作者： [Anonymous] Orthopaedic Research Unit The Queen’s University of Belfast School of Biomedical Sciences The Queen’s University of Belfast Howmedica International Ltd. Raheen Industrial Estate Limerick Department of Mechanical Engineering Trinity College Dublin 2 Mater Hospital Dublin 7 Orthopaedic Research Laboratory Århus University Hospital Denmark University of Limerick Limerick Limerick Regional Hospital Raheen Limerick Boston Scientific Ireland Ltd. Galway Department of Mechanical Engineering University College Dublin Dublin Department of Electrical and Electronic Engineering University College Dublin Dublin Bioengineering Research Centre Department of Mechanical Engineering University College Dublin Dublin Northern Ireland Bio-Engineering Centre (NIBEC) School of Electrical and Mechanical Engineering University of Ulster Newtownabbey Department of Mechanical & Manufacturing Engineering The Ashby Building The Queen’s University of Belfast Johnson and Johnson Professional Orthopaedic Division Queensway England Department of Cardiology and Department of Medical Physics & Bioengineering St. James’s Hospital Dublin 8 Burke House Ellison Street Castlebar Royal College of Surgeons in Ireland Department of Surgery Beaumont Hospital Dublin Department of Electronic and Electrical Engineering Trinity College Dublin 2 Department of Aeronautical Engineering The Queen’s University of Belfast Vascular Unit Belfast City Hospital Department of Medical Physics and Bioengineering St. James’s Hospital Dublin 8 Centre for Biomedical Electronics Department of Electronic and Computer Engineering University of Limerick Limerick Department of Mechanical and Aeronautical Engineering University of Limerick Limerick School of Health Sciences University of Ulster Ireland School of Physiotherapy University of Ulster Newtownabbey Clinical Engineering NI Medical Physics Agency Belfast and Radiology Royal Victoria Hospital Musgrave Park Hospital University of Limerick Biomedical Institute (ULBMI) Uni

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Implementations of advisory system for the solvent selection of carbon dioxide removal processes

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ENERGY CONVERSION AND MANAGEMENT 1997年第0期38卷 S87-S92页

作者： Chan, C Lau, P Dept. of Computer Science/Energy Informatics Laboratory University of Regina Regina SASK S4S 0A2 Canada

The Solvent Selection Advisory System (SSAS) is a decision support system for aiding users in the preliminary selection of optimal solvents for carbon dioxide removal processes given different user specification and plant conditions. This paper describes an inference-network representation of the Solvent Selection Advisory System which has been previously implemented as a rule-based system. Two expert system shells, G2 and GDA from Gensym Corp. are used, and the implementations on the two shells are compared. Some advantages and disadvantages in the two representation approaches are discussed. (C) 1997 Elsevier science Ltd.

关键词： selection of solvents implementations rule-based system block-based system

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Knowledge acquisition by the domain expert using the tool HEMATOOL 6th

Knowledge acquisition by the domain expert using the tool HE...

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6th Conference on Artificial Intelligence in Medicine in Europe, AIME 1997

作者： Du Plessis, Johan P. Janse Tolmie, C. Dept. of Computer Science and Informatics University of the Free State PO Box 339 Blocmfontein South Africa

ISBN: (纸本)354062709X

The commercial expert system tools do not provide enough support for knowledge base construction and maintenance with respect to KA tools provided. HEMATOOL provides an easy way to overcome some of the problems of KA and knowledge base maintenance. HEMATOOL allows the domain expert to concentrate on various parts of the domain, e.g. parameters, one at a time. As new knowledge becomes available, the expat is in the position to maintain, to a certain extent, the knowledge base. However, in some situations the knowledge engineer will be still be required to render assistance. HEMATOOL is a prototype system which is currently being evaluated. In this paper we suggest an Object-Oriented approach towards KB modelling. Not all the domains are best modelled by the OO paradigm. The applicability of this approach, therefore, depends on the nature of the knowledge in the domain.

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Retrospective intermodality registration techniques: Surface-based versus volume-based 1st

Retrospective intermodality registration techniques: Surface...

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1st International Joint Conference on computer Vision, Virtual Reality, and Robotics in Medicine and Medical Robotics and computer Assisted Surgery, CVRMed-MRCAS 1997

作者： West, Jay Fitzpatrick, J. Michael Wang, Matthew Y. Dawant, Benoit M. Maurer, Calvin R. Kessler, Robert M. Maciunas, Robert J. Dept. Of Computer Science Vanderbilt University NashvilleTN United States Dept. Of Electrical and Computer Engineering Vanderbilt University NashvilleTN United States Dept. Of Biomedical Engineering Vanderbilt University NashvilleTN United States Dept. Of Radiology Vanderbilt University NashvilleTN United States Dept. Of Neurological Surgery Vanderbilt University NashvilleTN United States

ISBN: (纸本)3540627340

The primary objective of this study is to perform a blinded evaluation of two groups of retrospective image registration techniques using as a gold standard a prospective, marker-based registration method, and to compare the performance of one group with the other. In order to ensure blindedness, all retrospective registrations were performed by participants who had no knowledge of the gold-standard results until after their results had been submitted. Image volumes of three modalities—X-ray Computed Tomography (CT), Magnetic Resonance (MR), and Positron Emission Tomography (PET)—were obtained from patients undergoing neurosurgery at Vanderbilt University Medical Center on whom bone-implanted fiducial markers were mounted. These volumes had all traces of the markers removed and were provided via the Internet to project collaborators outside Vanderbilt, who then performed retrospective registrations on the volumes, calculating transformations from CT to MR and/or from PET to MR. These investigators communicated their transformations again via the Internet to Vanderbilt, where the accuracy of each registration was evaluated. In this evaluation, the accuracy is measured at multiple "volumes of interest" (VOIs). Our results indicate that the volume-based techniques in this study tended to give substantially more accurate and reliable results than the surface-based ones for the CT-to-MR registration tasks and slightly more accurate results for the PET-to-MR tasks. It was also apparent that all of the registration techniques we examined have the potential to produce satisfactory results much of the time but that visual inspection is necessary to guard against large errors. © Springer-Verlag Berlin Heidelberg 1997.

关键词： Magnetic resonance

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A support system for content-based medical image retrieval in object oriented databases

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Journal of Medical Systems 1997年第6期21卷 339-352页

作者： Traina Jr., Caetano Traina, Agma J. M. Dos Santos, Rildo R. Senzako, Edna Y. Computer Science Department Mathematics Institute at Sao Carlos Sao Paulo University USP Brazil Development and Research Institute on Database and Information Management Sao Carlos Brazil Computer Science Dept. State of Sao Paulo University at S.J. Rio Preto UNESP Brazil Informatics and Physics Dept. Physics Institute at Sao Carlos Sao Paulo University USP Brazil

This work describes both the concepts used in an Object Manager for storage of medical images as one more data type associated to objects, and a support system developed to offer this kind of tool to medical application developers. The purpose of this work is to support the retrieval of images through queries based on the graphical contents of the stored images. The usual approach uses icons and textual attributes stored with the images to specify the queries. This work uses a novel modeling technique to define the 'image data type,' by means of which it is possible to decide, before the query itself, the key data of each image that must be extracted from the image when it is stored in the database, so the search can be accelerated when queries are issued. This approach enables building of expansible systems, where new image processing algorithms can be added easily, using its syntactic representation stored through an Image Meta-schema into the application database schema. This work shows how such a system has been implemented, and also provides a query language used to refer and execute these algorithms from inside the database management system.

关键词： Data modeling Digital library Image database Image information systems Medical databases Object oriented database PACS

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Learning logic programs with random classification noise 6th

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6th International Workshop on Inductive Logic Programming, ILP-1996

作者： Horváth, Tamás Sloan, Robert H. Turán, György Dept. Of Applied Informatics József A. University Szeged6720 Hungary Dept. Of EE & Computer Science University of Illinois at Chicago 851 S. Morgan St. ChicagoIL60607-7053 United States Dept. Of Mathematics Star. & Computer Science University of Illinois at Chicago Research Group on Artificial Intelligence Hungarian Academy of Sciences United States

ISBN: (纸本)3540634940

We consider the learnability of classes of logic programs in the presence of noise, assuming that the label of each example is reversed with a fixed probability. We review the polynomial PAC learnabi]Jty of nonrecursive, determinate, constant-dept. Horn clauses in the presence of such noise. This remflt is extended to an analogous class of recursive logic programs that consist of a recursive clause, a base case clause, and ground background knowledge. Also, we show that arbitrary nonrecursive Horn clauses with forest background knowledge remain polynomially PAC learnable in the presence of noise. We point out that the sample size can be decreased by using dependencies among the literals. © Springer-Verlag Berlin Heidelberg 1997.

关键词： computer circuits

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Language generation for multimedia healthcare briefings 5

Language generation for multimedia healthcare briefings

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5th Conference on Applied Natural Language Processing, ANLP 1997

作者： McKeown, Kathleen R. Pan, Shimei Shaw, James Jordan, Desmond A. Allen, Barry A. Dept. of Computer Science Columbia University New YorkNY10027 United States Dept. of Anesthesiology College of Physicians and Surgeons Columbia University New YorkNY10032 United States Medical Informatics Dept. College of Physicians and Surgeons Columbia University New YorkNY10032 United States

This paper identifies issues for language generation that arose in developing a multimedia interface to healthcare data that includes coordinated speech, text and graphics. In order to produce brief speech for time-pressured caregivers, the system both combines related information into a single sentence and uses abbreviated references in speech when an unambiguous textual reference is also used. Finally, due to the temporal nature of the speech, the language generation module needs to communicate information about the ordering and duration of references to other temporal media, such as graphics, in order to allow for coordination between media. © 1997, Association for Computational Linguistics.

关键词： Health care

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