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第二届旋翼飞行器技术基础研究国际学术会议

作者： Daniel P.Schrage Jerry P.Higman Center of Excellence in Rotorcraft Technology School of Aerospace Engineering Georgia Institute of Technology Atlanta Georgia USA US Army Apache Attack Helicopter Program Management Office Huntsville Alabama USA

In this paper, an overview of the technology of helicopter rotor load and inflow determination is presented. It systematically summarizes the relevant concepts, methods or approaches, applications and the further development in this area. Some concepts and / or methods are presented for the first time. This technology includes "rotor load identification", "rotor inflow identification" and "rotor load transformation". Unlike the theoretical analysis based prediction which is a common approach to determine the rotor inflow and loads and known as the "direct" problem, the technology discussed in this paper is test-based and to solve the "inverse" problem or combined "inverse/direct" problem. The basic concepts, ideas and development of this technology are briefly introduced. Then the methods or approaches of rotor blade motion and load identification, rotor hub load determination, rotor inflow identification, and rotor load transformation (including load transformation for rotor blade structure changes and load transformation for flight condition changes) are described, respectively. Possible applications to the areas of helicopter rotor design, test, helicopter simulation and operations throughout the helicopter lifecycle are listed. Finally, future work to improve the current methods, to extend the applications of this technology and to further the development of this technology is discussed.

关键词： Rotor Load and Inflow Determination technology

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Wet-weather pollution from commonly-used building materials

Wet-weather pollution from commonly-used building materials

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2005 World Water and Environmental Resources Congress

作者： Clark, Shirley E. Lalor, Melinda Pratap, Mukesh Field, Richard Pitt, Robert School of Science Engineering and Technology Environmental Engineering Program Penn State Harrisburg 777 W. Harrisburg Pike TL-173 Middletown PA 17057 Department of Civil and Environmental Engineering University of Alabama at Birmingham 1075 13th St. Birmingham AL 35294 Urban Watershed Management Branch U.S. Environmental Protection Agency MS-104 2890 Woodbridge Av. Edison NJ 08837 Department of Civil and Environmental Engineering University of Alabama Tuscaloosa AL 35487-0205

ISBN: (纸本)0784407924

Development in sensitive watersheds continues to pose environmental problems for receiving waters. One contributor to the long-term pollution of sensitive waterways is building and construction materials. However, the long-term effect of many building materials on the environment has not been quantified. Prior testing of these materials in the laboratory has indicated that the potential for release (primarily nutrients, lighter hydrocarbons, pesticides, and metals) is significant. Additional testing for metals' release from aged roofing panels also has shown that the potential for pollutant release still exists after 60 years of exposure to the environment. The data that is missing from a complete evaluation of specific building materials is behavior over the lifespan of the material, including the critical period of initial exposure. This paper provides an overview of the limited literature available on the subject, results from laboratory testing of common building materials and aged roofing panels, and an overview of the next phase of needed research. Copyright ASCE 2005.

关键词： Water pollution

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management education for construction in Poland and Portugal

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Technological and Economic Development of Economy 2005年第4期11卷 270-277页

作者： Cieszyński, Kazimierz Minasowicz, Andrzej Nowak, Paul Olaf Teixeira, José Cardoso Warsaw University of Technology 00-637 Warsaw Armii Ludowej 16 Poland Polish British Construction Partnership Sp. Z o.o. 00-519 Warsaw Wspólna 41/24 Poland Universtiy of Minho Campus de Azeurem 4700-058 Guimarćes Portugal Department of Construction Engineering and Management Civil Engineering Faculty Warsaw University of Technology Poland CIOB Poland Civil Engineering Faculty Warsaw University of Technology Poland Polish British Construction Partnership Sp. Z o.o. Poland Chartered Institute of Building (FCIOB) Association of Consulting Engineers and Experts (SIDIR) Institution of Civil Engineering (ICE) United Kingdom Association for Total Cost Management Poland American Association of Cost Estimators (AACE) United States Science Association of Construction Process Engineering Poland Polish Association of Building Managers Poland Polish British Construction Partnership Poland Leonardo da Vinci Program Poland Universidade do Minho Portugal

Countries emerging from centralised economies presently face the challenge of rapidly adapting their production structures to the market economy. In the last twelve years Poland has consistently evolved in that direction leading to the development of substantial construction investments and to the advent of thousands of small and medium construction companies. However, construction staff does not seem to fully stand for the demands of this shift, especially because of the lack of management skills now required. Portugal benefits from an uninterrupted process of development in a free economic market environment. Nevertheless, the broad nature of civil engineering undergraduate programmes does not allow young construction professionals to get these management skills at this level of studies. However, present requirements of project management expertise in the free European construction market call for the involvement of higher education institutions of both countries to answer industry demands in this field of knowledge. This paper reports the main objectives and findings of a survey conducted in the scope a Leonardo da Vinci project on the Polish education system requirements for technical and managerial skills of construction professionals.

关键词： Construction Learning management Poland Portugal

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Universal designs versus assistive technologies: Research agendas and practical applications

Universal designs versus assistive technologies: Research ag...

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ASSETS 2005 - The Seventh International ACM SIGACCESS Conference on Computers and Accessibility

作者： Law, Chris Jacko, Julie Peterson, Bill Tobias, Jim Information Systems Department UMBC 1000 Hilltop Circle Baltimore MD 21227 United States Department of Biomedical Engineering Georgia Institute of Technology 313 Ferst Drive NW Atlanta GA 30332 United States Section 508 Program Management. Office Department of Homeland Security 301 7th Street SW Washington DC 20407 United States Inclusive Technologies 37 Miriam Drive Matawan NJ 07747 United States Georgia Tech. United States Laboratory for HCI and Health Care Informatics United States Section 508 Program Management Office United States Interagency Committee on Disability Research Subcommittee on Technology Inclusive Technologies United States United States

No abstract available

ISBN: (纸本)1595931597

No abstract available

关键词： Assistive Technologies Research and Practice Universal Design

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Editorial message: Special track on organizational engineering

Proceedings of the ACM Symposium on Applied Computing

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Proceedings of the ACM Symposium on Applied Computing 2005年 2卷 1293-1294页

作者： Tribolet, Jose Winter, Robert Caetano, Artur Institute Superior Técnico Technical University of Lisbon Av. Rovisco Pais 1049-001 Lisboa Portugal Institute of Information Management University of St. Gallen Mueller-Friedberg-Str 8 9000 St. Gallen Switzerland Department of Computer Engineering and Information Technology Instituto Superior Técnico Technical University of Lisbon Portugal Switzerland HSG's Executive MBA Program in Business Engineering Switzerland Instituto Superior Técnico Technical University of Lisbon Portugal

No abstract available

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Global e-readiness—forwhat? Readiness for e-banking

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Information technology for Development 2005年第4期11卷

作者： Vincent Maugis Nazli Choucri Stuart E. Madnick Michael D. Siegel Sharon E. Gillett Farnaz Haghseta Hongwei Zhu Michael L. Best Department of Political Science Massachusetts Institute of Technology Cambridge MA 02139 Department of Political Science Technology and Development Program Massachusetts Institute of Technology Cambridge MA 02139 Sloan School of Management School of Engineering Massachusetts Institute of Technology Cambridge MA 02139 Sloan School of Management Massachusetts Institute of Technology Cambridge MA 02139 Internet and Telecoms Convergence Program Massachusetts Institute of Technology Cambridge MA 02139 MIT Open Course Ware Massachusetts Institute of Technology Cambridge MA 02139 Technology and Policy Program Massachusetts Institute of Technology Cambridge MA 02139 Program in Media Arts and Science Massachusetts Institute of Technology Cambridge MA 02139

With the rapid diffusion of the Internet worldwide, there has been considerable interest in the e-potentials of developing countries giving rise to a first generation of e-readiness studies. Moreover, e-readiness means different things to different people, in different contexts, and for different purposes. Despite strong merits, this first generation of e-readiness studies assumed a fixed, one-size-fits-all set of requirements, regardless of the characteristics of individual countries, the investment context, or the demands of specific applications. This feature obscures critical information for investors or policy analysts seeking to reduce uncertainties and make educated decisions. But there is very little known about e-readiness for e-banking. In particular, based on lessons learned to date and their implications for emerging realities of the 21st century, the authors designed and executed a research project with theoretical as well as practical dimensions to answer the question of “e-Readiness for What ?,” focusing specifically on e-banking, based on the very assumption that one size can seldom, if ever, fit all. The authors also propose and develop a conceptual framework for the “next generation” e-readiness—focusing on different e-business applications in different economic contexts with potentially different pathways—as well as a data model—to explore e-readiness for e-banking in 10 countries. © 2005 Wiley Periodicals, Inc.

关键词： e-readiness assessment value-creation opportunities e-banking banking pathways profiles leapfrogging

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Health implication among occupational exposed workers in a chromium alloy factory, Thailand

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Journal of Environmental Sciences 2004年第2期16卷 181-186页

作者： S. Muttamara Shing Tet Leong Research Lab Supervisor Urban Environmental Engineering and Management Program School of EnvironmentResources and DevelopmentAsian Institute of Technology G.P.O. Box 4Klong LuangResearch Lab SupervisorUrban Environmental Engineering and Management Program School of EnvironmentResources and DevelopmentAsian Institute of Technology G.P.O. Box 4Klong Luang Pathumthani 12120 ThailandPathumthani 12120 Thailand

This study was conducted to assess the occupational exposure and its health impact on the chromium alloy workers. Environmental and biological monitoring, noise and audiometry measurements were done to evaluate the exposure levels in the factory. A total of 112 non-smoking workers were monitored from July 2001 to August 2002 The results showed that most of the chromium and lead exposures in the factory were below the ACGIH-TWA of 50 μg/m 3 for chromium(Ⅵ) and OSHA-PEL of 50 μg/m 3 for lead. The highest chromium(7 25±0 16 μg/m 3) and lead(14 50±0 29 μg/m 3) concentrations were measured in the vibro room. The results indicated that elevated concentrations of chromium and lead were found in both blood and urine samples especially in those areas which were characterized by poor ventilation. The metal contents in blood and urine samples were significantly correlated with airborne metal concentrations in the factory. The result demonstrated that blood and urinary levels among workers were associated with increasing age and duration of exposure. The background noise level of the factory ranged from 67 6 to 89 2 dBA and was frequently higher than the threshold limit value for noise(90 dBA). According to the audiometric test, the exposed workers showed signs of noise-induced hearing loss. Noise at work continued to be an important factor to hearing loss among exposed workers. In our statistical analysis, a significant hearing loss was established on age effect and year of exposure among the workforce.

关键词： chromium and lead exposure electroplating environmental and biological monitoring audiometry measurement

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Web-based project based learning (PBL) activities - A technogenesis example using a senior design lab

Web-based project based learning (PBL) activities - A techno...

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ASEE 2004 Annual Conference and Exposition, "engineering Researchs New Heights"

作者： Abel, Kate D. Merino, Donald N. Stevens Institute of Technology Engineering Management Program Charles V. Schaefer Jr. Sch. Eng. Stevens Institute of Technology

The use of web-based project based learning (PBL) in improving student learning was discussed. A regression analysis was conducted to compare the frequency of students' web-based access with their grades. The number of web accesses for each student was considered as the independent variable and the student's final grade as the dependent variable. It was suggested that the web-based project learning environment should be further explored to see if teaching effectiveness can be improved.

关键词： Learning systems

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A study of the impact of production scheduling using enterprise simulation

A study of the impact of production scheduling using enterpr...

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IIE Annual Conference and Exhibition 2004

作者： Rabelo, Luis Helal, Magdy Jones, Albert Department of Industrial Engineering and Management Systems University of Central Florida Orlando FL 32816 Enterprise Integration Program Director National Institute of Standards and Technology

The strong tendency toward integrated systems and the system thinking approaches are shaping the way manufacturing enterprises are being managed, especially in an environment of market globalization, ever varying customer requirements and increasing competition. To achieve a competitive advantage an enterprise must cope with these changes in the working environment. The future development of manufacturing simulation systems is directed to integrated enterprise modeling in two direction: horizontally by integration of manufacturing processes with the entire enterprise logistics chain, and vertically by integration of the decision making processes at strategic, tactical and operation levels [1]. In this work, we introduce a hybrid approach to the integration of discrete-event models with system dynamic models to simulate the entire manufacturing enterprise. This approach basically covers the strategic, tactical, and operational levels of decision-making in a single simulation of multiple models at different levels and resolutions. System dynamics (SD) is utilized to model the higher levels of decision-making in the enterprise. On the other hand, discrete-event simulation (DES) models are utilized for the factory and shop floor levels. Studying the interaction between strategic planning and the production activities is the core of this work. Discrete event simulation has been the most usable simulation tool in manufacturing systems. It has the ability to describe the most complex systems at any level of details while allowing tracking the status of individual entities and resources and estimate numerous performance measures associated with these entities various operating conditions. This makes it most appropriate approach to simulate the detailed production activities. At the higher levels of decisions making, the detailed approach of DES is not appropriate [2,3,4]. For one reason the decision maker at such levels do not prefer detailed analyses. In additions unlike m

关键词： Production control

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Benzene and lead exposure assessment among occupational bus drivers in Bangkok traffic

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Journal of Environmental Sciences 2004年第1期16卷 61-66页

作者： SHING TET LEONG PREECHA LAORTANAKUL Research Lab Supervisor Urban Environmental Engineering and Management ProgramSchool of EnvironmentResource and DevelopmentAsian Institute of TechnologyAffiliated Research Associate G.P.O. Box 4 Klong Luang Pathumthani 12120 Thailand216 Soi Satsana 5 Phya Thai Bangkok 10400 Thailand

Four environmental and biological monitoring sites were strategically established to evaluate benzene and lead exposure assessment at various traffic zones of Bangkok Metropolitan Region(BMR). Biological measurement of 48 non air-conditioned, male bus drivers was carried to study the relationship between individual exposure levels and exposure biomarkers. The study group was further sub-divided into four age groups(16—25, 26—35, 36—45 and 46—55 years old) to monitor the age—related exposure effects. A total of 12 unexposed persons were deliberately chosen as the control group. Measurement of unmetobolized benzene in blood and analysis of urinary tt-Muconic acid urine and urinary creatinine are recommended as biomarkers of benzene exposure. Measurement of lead in blood and urine is also recommended for the biological monitoring of lead exposure. During the monitoring period, benzene and lead levels at Yaowarat Road was C_6H_6: 42.46±3.88 μg/m 3, Pb: 0.29±0.03 μg/m 3 and decreased to C_6H_6: 33.5±1.35 μg/m 3, Pb: 0.13±0.01 μg/m 3 at Phahonyothin Road. Significant difference was established between the nonsmoking exposed group and nonsmoking control group for blood benzene concentrations ( P <0.001, two-tailed, Mann-Whiteney U test). Strong correlations were also found between trans-trans-Muconic acid concentrations in post shift samples and atmospheric benzene concentrations. Similarly, good correlation between all of biomarkers and lead level in air is established from automobile *** analysis revealed that among the occupational population in the urban sites, the driver groups were found to have the highest risk of benzene and lead exposures derived from automobile emission.

关键词： benzene and lead measurement biomarkers exposure assessment human biomonitoring unleaded gasoline

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