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IEEE Virtual Reality 2006 Conference

作者： Raij, Andrew B. Johnsen, Kyle Dickerson, Robert F. Lok, Benjamin C. Cohen, Marc S. Duerson, Margaret Pauly, Rebecca Rainer Stevens, Amy O. Wagner, Peggy Lind, D. Scott Univ Florida Dept Comp Sci & Engn Gainesville FL 32611 USA Univ Virginia Dept Comp Sci Charlottesville VA 22904 USA Univ Florida Coll Med VA Med Ctr Gainesville FL 32610 USA NFSG VA Hlth Syst Gainesville FL 32610 USA Med Coll Georgia Sch Med Augusta GA 30912 USA Med Coll Georgia Dept Surg Augusta GA 30912 USA

This paper provides key insights into the construction and evaluation of interpersonal simulators-systems that enable interpersonal interaction with virtual humans. Using an interpersonal simulator, two studies were conducted that compare interactions with a virtual human to interactions with a similar real human. The specific interpersonal scenario employed was that of a medical interview. Medical students interacted with either a virtual human simulating appendicitis or a real human pretending to have the same symptoms. In Study I (n = 24), medical students elicited the same information from the virtual and real human, indicating that the content of the virtual and real interactions were similar. However, participants appeared less engaged and insincere with the virtual human. These behavioral differences likely stemmed from the virtual human's limited expressive behavior. Study II (n = 58) explored participant behavior using new measures. Nonverbal behavior appeared to communicate lower interest and a poorer attitude toward the virtual human. Some subjective measures of participant behavior yielded contradictory results, highlighting the need for objective, physically-based measures in future studies.

关键词： intelligent agents virtual reality human-centered computing user interfaces interaction styles evaluation/methodology computer graphics medicine

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Next-Generation Multimedia Database Retrieval

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IEEE Multimedia 2007年第3期14卷 106-107页

作者： Gómez, Jaime Vicedo, Jose Luis University of Alicante Spain

The authors review a book that offers a human-centered approach on next-generation multimedia database retrieval.

关键词： Writers multimedia databases human-centered computing retrieval

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Towards a shared language for problem-solving in design 07

Towards a shared language for problem-solving in design

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Proceedings of the 2007 Symposium on Science of Design

作者： Steven L. Tanimoto University of Washington

ISBN: (纸本)9781605584362

As tools for design get increasingly complex and powerful, it is increasingly important that their users have a solid grounding in what it is these tools do and how they do it. When these tools are software engineering tools, we can assume that their users have formal training in computing. However, when the tools are for designing art or multimedia objects, the artists using the tools typically don't have much background in the computing technology they are using. While interdisciplinary design teams can work around the shortcomings of individual team members, they might be more effective teams if they shared a common language and understanding of certain key aspects of the design process. At the University of Washington we have begun a project to study the use of the theory of problem solving as shared knowledge by design teams engaged in creating of multimedia games. The theory we used is derived from early work in artificial intelligence. The concepts of state space, search, operators and evaluation functions are key components of the shared knowledge. The theory is embodied in a software system called T-STAR (Transparent STate-spaces search ARchitecture) which supports a collaborative interface for problem-solving. A key question for the project is "to what extent will interdisciplinary design teams adopt and exploit the theory of problem solving when given an opportunity to do so?"

关键词： user interfaces tree visualization statespace search design process methodology human-centered computing language of design collaborative learning

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human-centered ontology engineering: The HCOME methodology

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KNOWLEDGE AND INFORMATION SYSTEMS 2006年第1期10卷 109-131页

作者： Kotis, Konstantinos Vouros, George A. Univ Aegean Dept Informat & Commun Syst Engn Karlovassi 83200 Greece

The fast emergent and continuously evolving areas of the Semantic Web and Knowledge Management make the incorporation of ontology engineering tasks in knowledge-empowered organizations and in the World Wide Web more than necessary. In such environments, the development and evolution of ontologies must be seen as a dynamic process that has to be supported through the entire ontology life cycle, resulting to living ontologies. The aim of this paper is to present the human-centered Ontology Engineering Methodology (HCOME) for the development and evaluation of living ontologies in the context of communities of knowledge workers. The methodology aims to empower knowledge workers to continuously manage their formal conceptualizations in their day-to-day activities and shape their information space by being actively involved in the ontology life cycle. The paper also demonstrates the human centered ONtology Engineering Environment, HCONE, which can effectively support this methodology.

关键词： semantic web ontology engineering human-centered computing knowledge management

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Transparent decision support using statistical reasoning and fuzzy inference

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IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING 2006年第8期18卷 1125-1137页

作者： Hamilton-Wright, Andrew Stashuk, Daniel W. Univ Guelph Dept Comp & Informat Sci Guelph ON N1G 2W1 Canada Univ Waterloo Dept Syst Design Engn Waterloo ON N2L 3G1 Canada

A framework for the development of a decision support system (DSS) that exhibits uncommonly transparent rule-based inference logic is introduced. A DSS is constructed by marrying a statistically based fuzzy inference system (FIS) with a user interface, allowing drill-down exploration of the underlying statistical support, providing transparent access to both the rule-based inference as well as the underlying statistical basis for the rules. The FIS is constructed through a "Pattern Discovery" based analysis of training data. Such an analysis yields a rule base characterized by simple explanations for any rule or data division in the extracted knowledge base. The reliability of a fuzzy inference is well predicted by a confidence measure that determines the probability of a correct suggestion by examination of values produced within the inference calculation. The combination of these components provides a means of constructing decision support systems that exhibit a degree of transparency beyond that commonly observed in supervised-learning-based methods. A prototype DSS is analyzed in terms of its workflow and usability, outlining the insight derived through use of the framework. This is demonstrated by considering a simple synthetic data example and a more interesting real-world example application with the goal of characterizing patients with respect to risk of heart disease. Specific input data samples and corresponding output suggestions created by the system are presented and discussed. The means by which the suggestions made by the system may be used in a larger decision context is evaluated.

关键词： fuzzy rule-based classification systems fuzzy inference systems pattern discovery decision support software engineering human-centered computing

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Comparison of clinical and pathological staging and long-term results of liver transplantation for hepatocellular carcinoma in a single transplant center

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TRANSPLANTATION PROCEEDINGS 2006年第4期38卷 1111-1113页

作者： Baccarani, U. Adani, G. L. Avellini, C. Lorenzin, D. Curro, G. Beltrami, A. Pasqualucci, A. Bresadola, V. Risaliti, A. Viale, P. L. Beltrami, C. A. Bresadola, F. Univ Udine Dept Surg I-33100 Udine Italy Univ Udine Transplantat Unit I-33100 Udine Italy Univ Hosp Udine Inst Infect Dis Udine Italy Univ Hosp Udine Inst Pathol Udine Italy

Liver transplantation (OLT) is a treatment for hepatocellular carcinoma (HCC) superimposed on cirrhosis provided that the disease meets defined criteria. The aim of the study was to evaluate our experience with respect to clinical and pathological staging and long-term results. From 1996 to 2005, 50 patients underwent OLT for HCC including 43 men (86%) and seven women (14%) of median age 57 years (range 37 to 67). All patients fulfilled the Milan criteria. The HCC diagnosis was based on preoperative imaging and alpha-fetoprotein levels;no tumor biopsy was performed. Upon histological examination of the resected specimens, we discovered 6 (12%) incidentalomas and 8 (16%) cases of no HCC. Finally we had 42 "true" HCC. Twenty-six patients (52%) have been downstaged and 10 (20%) upstaged by preoperative imaging;15% were pT1, 45% were pT2, 27% pT3, and 13% pT4a. Twenty-six percent of cases exceeded the Milan criteria. One patient (pT4a) with microvascular invasion died of pulmonary metastases at 14 months after transplantation. No HCC recurrences within the liver have been encountered at a median follow-up of 20 months (range 0 to 80 months). Overall the estimated 1-, 3-, and 5-year survival rates were 83%, 77%, and 72%, respectively. One-, 3-, and 5-year estimated survival rates were 87%, 75%, and 75% for pT1, and pT2, and 75%, 67%, and 67% for pT3 and pT4a, respectively (P =.99). Based on our experience OLT for HCC has long-term results comparable to those without HCC despite the presence of a significant number of cases exceeding the Milan criteria upon pathological staging.

关键词： With staging criteria month Clinical Transplantation of liver Hepatocellular Cancer pT3 Stage Finding Medical Staging Survival Rate pT4a Stage Finding Liver Transplantation tumor biopsy human-centered computing Optical Line Terminal pT2 Stage Finding

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Aromatase inhibitors may be effective in the management of advanced hepatocellular carcinoma

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MEDICAL HYPOTHESES 2006年第6期66卷 1257-1257页

作者： Altundag, O Altundag, K Turen, S Gunduz, E Atik, MA Univ Hacettepe Inst Oncol Dept Med Oncol TR-06100 Ankara Turkey Univ Texas Houston Med Sch Med Mem Hermann Hosp Dept Pulm & Crit Care Houston TX 77030 USA Okayama Univ Grad Sch Med & Dent Dept Oral Pathol & Med Okayama 7008530 Japan Baylor Coll Med Dept Neurosurg Houston TX 77030 USA

Hepatocellular carcinoma (HCC) represents the sixth leading cancer and the third most common cause of death from cancer worldwide. There is no firstline option for patients with advanced HCC (vascular invasion, extrahepatic spread, or cancer-related symptoms). Systemic doxorubicin provides partial responses in 10% of cases, without proven survival advantages, and well-known treatment-related complications. Several other treatments, such as immunotherapy, internal radiation, tamoxifen, or anti-androgen agents, have not shown any relevant anti-tumoral effect or survival benefit . Experimentally, estrogens are involved in stimulating hepa-tocyte proliferation in vitro and may act as liver tumor inducers or promoters in vivo. Inefficacy of anti-estrogen tamoxifen however, could be partly attributable to the presence of variant estrogen receptor (ER) forms , or to alternative, non-recep-torial mechanisms potentially involved in growth regulation of both normal and cancer human liver cells by estrogen . By assuming that estrogen plays a role in hepatoma cell growth through non-receptor pathways, we can think of a strategy as reducing estrogen concentration in tumor tissue through aromatase inhibitors that deplete estrogen by inhibiting aromatase, the enzyme that synthesizes estrogen from androgens. One study has investigated the activity and expression of aromatase enzyme in non-tumoral, cirrhotic, and malignant human liver tissues and cells using both chromatographic and reverse transcription) (RT)-PCR analyses. They reported that human HCC tissues showed elevated aromatase activity, with increased estrogen formation rates, as opposed to non-tumoral hepatic tissues . Therefore, aromatase inhibitors may be considered in the management of advanced HCC.

关键词： Aromatase Inhibitors Carcinoma Hepatocellular Estrogens Liver Neoplasms Aromatase Inhibitors Estrogens Cause of Death Aromatase Liver Neoplasms human-centered computing Carcinoma

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Work-centered support systems: A human-centered approach to intelligent system design

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IEEE INTELLIGENT SYSTEMS 2005年第2期20卷 73-81页

作者： Scott, R Roth, EM Deutsch, SE Malchiodi, E Kazmierczak, TE Eggleston, RG Kuper, SR Whitaker, RD BBN Technol Intelligent Distributed Comp Dept Eden Prairie MN 55347 USA Roth Cognit Eng Brookline MA 02445 USA BBN Technol Human Ctr Syst Grp Cambridge MA 02138 USA BBN Syst & Technol Global Air Mobil Adv Technol Res Program Ofallon IL 62269 USA USAF Res Lab HECS Wright Patterson AFB OH 45433 USA USAF Res Lab HECS Wright Patterson AFB OH 45433 USA Northrop Grumman Informat Technol Fairborn OH 45324 USA

The work-centered support system approach to human-centered computing focuses on analyzing and supporting the multiple facets of work. The WCSS for global weather management developed to support weather forecasting and monitoring in an airlift service organization, exemplifies this approach. A hallmark of human-centered computing (HCC) is its focus on domain practitioners and their field of practice. human-centered design depends on a deep analysis of a field\'s cognitive and collaborative demands and how people work individually, in groups, and in organizations to meet those demands. The objective is to leverage what we know about human cognitive and collaborative processes to create systems that optimize the affordances (direct perception of meanings) and effectivities (knowledge-driven actions) for humans. The WCSS paradigm offers an approach for incorporating software agent technology in a manner that helps the user keep the head in the work and reduces the possibility that software agent states or actions surprise the user.

关键词： cognition decision support systems geophysics computing human factors software agents user centred design user interfaces weather forecasting airlift service organization global weather management human cognitive process human-centered computing intellig

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human-centered design of a distributed knowledge management system

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JOURNAL OF BIOMEDICAL INFORMATICS 2005年第1期38卷 4-17页

作者： Rinkus, S Walji, M Johnson-Throop, KA Malin, JT Turley, JP Smith, JW Zhang, JJ Univ Texas Sch Hlth Informat Sci Houston TX 77030 USA NASA Lyndon B Johnson Space Ctr Houston TX 77058 USA

Many healthcare technology projects fail due to the lack of consideration of human issues, such as workflow, organizational change, and usability, during the design and implementation stages of a project's development process. Even when human issues are considered, the consideration is typically on designing better user interfaces. We argue that human-centered computing goes beyond a better user interface: it should include considerations of users, functions and tasks that are fundamental to human-centered computing. From this perspective, we integrated a previously developed human-centered methodology with a Project Design Lifecycle, and we applied this integration in the design of a complex distributed knowledge management system for the Biomedical Engineer (BME) domain in the Mission Control Center at NASA Johnson Space Center. We analyzed this complex system, identified its problems, generated systems requirements, and provided specifications of a replacement prototype for effective organizational memory and knowledge management. We demonstrated the value provided by our human-centered approach and described the unique properties, structures, and processes discovered using this methodology and how they contributed in the design of the prototype. (C) 2004 Elsevier Inc. All rights reserved.

关键词： human-centered computing organizational memory knowledge management collaborative groupware information systems design ethnographic project lifecycle

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Treatment of hepatocellular carcinoma

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BEST PRACTICE & RESEARCH CLINICAL GASTROENTEROLOGY 2005年第1期19卷 129-145页

作者： Blum, HE Univ Freiburg Dept Med 2 D-79106 Freiburg Germany

Hepatocellular carcinoma (HCC) is one of the most common malignant tumours worldwide. The major etiologies and risk factors for HCC development are well defined and some of the multiple steps involved in hepatocarcinogeresis have been elucidated in recent years. Despite these scientific advances and the implementation of measures for early HCC detection in patients at risk, patient survival has not improved during the last three decades. This is due in part to the advanced stage of the disease at the time of clinical presentation, in part due to the limited therapeutic options. These fall into four main categories: (1) surgical interventions, incl. tumour resection and liver transplantation, (2) percutaneous interventions, incl. ethanol injection and radiofrequency thermal ablation, (3) transarterial interventions, incl. embolisation and chemoembolisation and (4) drugs as well as gene and immune therapies. These therapeutic strategies have been evaluated in part in randomised controlled clinical trials that are the basis for therapeutic recommendations. While surgery and percutaneous as well as transarterial interventions are effective in patients with limited disease (1-3 lesions, < 5 cm in diameter) and compensated underlying liver disease (cirrhosis Child A), at the time of diagnosis more than 80% patients present with multicentric HCC and advanced liver disease or comorbidities that restrict the therapeutic measures to best supportive care. In order to reduce morbidity and mortality from HCC, therefore, early diagnosis and the development of novel systemic therapies for advanced disease, incl. drugs, gene and immune therapies as well as primary HCC prevention are of paramount importance. Further, secondary HCC prevention after successful therapeutic interventions needs to be improved in order to make an impact on the survival of patients with HCC. New technologies, including gene expression profiling and proteomic analyses, should further elucidate the molecular

关键词： Carcinoma Hepatocellular Liver Neoplasms 癌肝细胞肝肿瘤 intervention therapy Embolization Liver Diseases Controlled Clinical Trials, Randomized human-centered computing Liver Neoplasms Carcinoma

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