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A Collection of Technical Papers - AIAA Space 2004 Conference and Exposition

作者： Pieronek, Catherine Pieronek, Tom University of Notre Dame Notre Dame IN 46556 Northrop Grumman Space Technology Redondo Beach CA 90278 Women's Engineering Program College of Engineering 257 Fitzpatrick Hall Space Tracking and Surveillance System External Affairs R3/2004

ISBN: (纸本)1563477203

In response to the decreasing number of engineering and science graduates nationwide, the aerospace industry must explore new ways to attract new college students. Because women now comprise a majority of all college students nationwide, but remain underrepresented in technical majors, industry initiatives aimed at attracting women to careers in aerospace can have dramatically positive results. Higher education in engineering and the hard sciences has grappled with similar problems for decades, and has made progress toward solving those problems through a variety of initiatives focused on the unique needs and interests of women. This paper explores the nature of the aerospace industry and presents solutions adapted from higher education to attract more women to careers in aerospace. Copyright © 2004 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

关键词： Aerospace engineering

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Collaboration model of software development

Collaboration model of software development

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2011 International Conference on Electrical engineering and Informatics, ICEEI 2011

作者： Kusumasari, Tien Fabrianti Supriana, Iping Surendro, Kridanto Sastramihardja, Husni Information System Program Study STMIK im Bandung Jl.Jakarta No.79 Bandung Indonesia School of Electrical Engineering and Informatics Bandung Institute of Technology Jl. Ganessa No.10 Bandung Indonesia

ISBN: (纸本)9781457707520

Software development is a series of processes activity involving more than one person, especially in medium to large software projects. Each activity of software development is carried out by various combination of different individual. Collaboration occurs in every phase of the process software development. The right team collaboration method is one of the important things in success software development. This research is focused to develop collaboration model of software development to meet time schedule, budget, scope, and software *** collaboration model of software development is generated from survey of collaboration method (about face to face and virtual collaboration) and software development methodology especially agile methodology. The direct collaboration was used in the software specification processes, and combination (with a direct and virtual) collaboration was used during software design, implementation, and validation. Team coordination in every process of software development was done with face to face method. The same artifacts were used in this collaboration model with some collaboration software tools. Combination between face to face and virtual communication was used in this model. The model is implemented in small case software development project. During the software development, some measurement is carried out. The measurement included the measurement of project completion time, cost, software specification, and software quality. The software is developed in time schedule (two months), cost under budged, and meet specification. In addition, the software has built a fairly good quality. Thus, this collaboration model good use in software development to achieved accuracy of schedule, cost, scope, and quality. © 2011 IEEE.

关键词： Software design

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Impacts of land use and land cover changes on hydrological processes and sediment yield determined using the SWAT model

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International Journal of Sediment Research 2022年第1期37卷 54-69页

作者： Edivaldo Afonso de Oliveira Serr?o Madson Tavares Silva Thomás Rocha Ferreira Lorena Concei??o Paiva de Ataide Cleber Assis dos Santos Aline Maria Meiguins de Lima Vicente de Paulo Rodrigues da Silva Francisco de Assis Salviano de Sousa Denis José Cardoso Gomes Academic Unit of Atmospheric Sciences Federal University of Campina Grande Institute of Technology Civil Engineering Graduate Program Federal University of Pará Earth System Science Center National Institute of Space Research Institute of Geosciences Federal University of Pará Department of Physics Center for Natural and Exact Sciences Federal University of Santa Maria

Land use and land cover (LULC) changes strongly affect local hydrology and sediment *** current study focused on a basin in the Brazilian Amazon and had the following three objectives:(1) to perform an effective diagnosis of flow and sediment yield,(2) to evaluate the impacts of LULC changes over the last 40 years on the hydro-sedimentological variables,and (3) to investigate the impacts of the possible trends or breaking points in the flow,surface runoff,and sediment yield *** Soil and Water Assessment Tool (SWAT) model validation showed that the simulated results were consistent with the data measured in the dynamic reproduction of flow ***,changes in LULC altered surface runoff,sediment yield,and flow according to the Mann-Kendall and Pettitt non-parametric *** was also observed that the sub-basins in which pastureland is predominant are more susceptible to increased surface runoff and sediment *** to trend and homogeneity tests,these sub-basins had break points in the time series of these *** the other hand,in the sub-basins whose land cover is predominantly forest,the time series is homogeneous and *** current study highlighted the impacts that 40 years of LULC changes in an Amazonian basin had on hydro-sedimentological variables,which,in turn,can play an important role in changing the hydrological cycle,consequently these changes can also impact diverse human activities in the region,such as agribusiness,livestock,energy production,food security,and public water ***,it is concluded that the SWAT model is a good estimator of hydro-sedimentological processes in Amazonian basins and can be used by decision makers in the management of water and environmental resources.

关键词： Hydrological modeling Sediment yield Amazon basin SWAT model

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Effects of aluminum content on oxidation behavior of W-Al nanolayer coatings

Effects of aluminum content on oxidation behavior of W-Al na...

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International Conference on engineering Tribology technology, ICETT 2014

作者： Sun-Hui, Yao Shang-Hsien, Hung Yen-Liang, Su Wen-Hsien, Kao Yueh-Feng, Lin Bachelor Degree Program in Technology Management Chang Jung Christian University Kway Jen Tainan71101 Taiwan Department of Mechanical Engineering National Chen Kung University Tainan70101 Taiwan Institute of Mechatronoptic System Chienkuo Technology University Zhanghua50094 Taiwan

ISBN: (纸本)9783038354581

A series of W-Al nanolayer coatings were deposited with varying content of aluminum from 0 at.% to 65 at.% by a unbalanced magnetron (UBM) sputtering system. The as-deposited coatings were investigated first. Then, the coatings were oxidized aiming to study their oxidation behavior. SEM, TEM, XRD, GDOS and nano-hardness tester were used. The results showed that the Al content had a significant effect on the performance of W-Al coatings. The hardness of as-deposited and oxidized coatings decreased with increasing Al content. The pure W coating was heavily oxidized. As the Al content increased, the oxidation decreased fast and then remained stable as the Al content was higher than 45at.%. The effects of formed oxides on hardness were discussed. © 2015 Trans Tech Publications, Switzerland.

关键词： Hardness

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Studies of distributed energy supply systems using an innovative energy management system

Studies of distributed energy supply systems using an innova...

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Power Industry Computer Application Conference (PICA)

作者： H. Muller A. Rudolf G. Aumayr Department of Electric Power Systems University of Technology Vienna Vienna Austria Program and System Engineering Energy & Information Siemens Ag Austria Program and System Engineering Energy & Information Siemens Ag Germany

ISBN: (纸本)0780366816

The liberalization of energy markets and the aims of the climate protection promote distributed systems. These systems permit inclusion of all practicable energy resources in the energy mix in connection with storage facilities, controllable loads as well as combined heating and power generation. This article describes an energy management system for distributed energy supply systems and it's application as a planning tool to prepare economy studies. The function of the energy management system is short-term optimization in co-generation systems, incorporating generating units using renewable primary energy. It is based essentially on the function packages forecast (weather, generation and load), operations planning and online modules. The operations planning takes into account different generating units, energy storage mechanisms, demand-side management, contracts and co-generation. The online modules perform redistribution of generation and load schedules, generation control and load control. The studies reported here deal with contract management, evaluation of emissions and renewable energy combined with battery systems.

关键词： Energy management Energy storage Weather forecasting Contracts Power system protection Energy resources Temperature control Control systems Cogeneration Power generation planning

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Fault management based on peer-to-peer paradigms

Fault management based on peer-to-peer paradigms

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10th IFIP/IEEE International Symposium on Integrated Network Management 2007, IM '07

作者： Leitner, Markus Leitner, Philipp Zach, Martin Collins, Sandra Fahy, Claire PSE-Program and System Engineering Siemens AG Austria Vienna Austria Ericsson RandD Ireland Network Management Research Centre Dublin Ireland TSSG-Telecommunications Software and Systems Group Waterford Institute of Technology Waterford Ireland

ISBN: (纸本)1424407990

We present an approach to fault management based on an architecture for distributed and collaborative network management as developed in the CELTIC project Madeira. It uses peer-to-peer communication facilities and a logical overlay network facilitating decentralized and iterative alarm processing and correlation. We argue that such an approach might help to overcome key challenges that are posed by NGN scenarios to traditional centralized network management systems. Its feasibility is demonstrated by means of a case study from the area of wireless mesh networks, where an application prototype has been developed. © 2007 IEEE.

关键词： Distributed computer systems

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Selectively bonded polymeric check valve for the reliable regulation of intraocular pressure

Selectively bonded polymeric check valve for the reliable re...

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作者： Im, Seongmin Mun, Byungphil An, Jaeyong Choi, Jongchan Yang, Sung Lee, Jonghyun School of Mechatronics Gwangju Institute of Science and Technology Gwangju Korea Republic of Graduate Program of Medical System Engineering Gwangju Institute of Science and Technology Gwangju Korea Republic of Department of Nanobio Materials and Electronics Gwangju Institute of Science and Technology Gwangju Korea Republic of

ISBN: (纸本)9789898425379

A glaucoma drainage device for the regulation of intraocular pressure is presented. The device consists of three biocompatible polymer layers: the cover (top layer), the diaphragm (intermediate layer), and the baseplate with a cannular (bottom layer). Finite element analyses (FEA) were performed to find optimal design parameters for the targeted cracking pressure: the diameter of orifice, the thickness of intermediate layer, the width of the channel, and the overlapped length of the orifice over valve seat. Top and bottom layers were made by polydimethylsiloxane (PDMS) replica molding process, and an intermediate thin layer with through-holes was fabricated by PDMS fill-in molding method and hydrophobic treatment. The overlapped area of the bottom layer was coated with Cr and Au by using PDMS as a shadow mask. Metal layers are not to be bonded between the bottom and the intermediate layers so that the device showed the enhanced reliability in operation and the higher yield in production. Oxygen plasma treatment was performed for irreversible bonds between separate three PDMS layers. The experimental cracking pressure of the fabricated valve was 2.50 kPa, which is very close to the target value (2.67 kPa). The experiments showed that the proposed polymer check valve can regulate the pressure of the aqueous humour, fluid in an anterior chamber, within the normal intraocular pressure range (15-20mmHg) with a high repeatability.

关键词： Polydimethylsiloxane

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The Study of Materials for Electric Field Protection of Power Transformer Testing

The Study of Materials for Electric Field Protection of Powe...

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International Conference on engineering, Applied Sciences, and technology (ICEAST)

作者： Peerawat Meesuk Prajak Bunpakdee Sirirat Sorn-In Electrical Engineering and Automation Control System Program Faculty of Engineering and Industrial Technology Bansomdejchaopraya Rajabhat Univrtsity Bangkok Thailand

This paper proposes the analysis of the material can be protected from transformer testing and presents a mathematical model of the power transformer. In this research, transformers were study in four protective materials, wood, rubber, glass and acrylic that are used in between the electric field measurement and the transformer. By simulating the test results of a transformer with a voltage of 230 kV. Computer-based simulation utilizing the finite element method (FEM) is exploited as a tool for visualizing electric fields distribution volume a power transformer. The simulation results showed that the material with the best protection against the electric field was wood insulation and the best installation location was a distance of 5 m from the transformer.

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Balancing collaboration and discipline in software development processes 10

Balancing collaboration and discipline in software developme...

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32nd ACM/IEEE International Conference on Software engineering, ICSE 2010

作者： Magdaleno, Andréa Magalhães COPPE/PESC System Engineering and Computer Science Program UFRJ PO Box 68511 21945-970 Rio de Janeiro RJ Brazil NP2Tec Research and Practice Group in Information Technology UNIRIO Brazil

ISBN: (纸本)9781605587196

Neither traditional, agile or free/open software development models can be effective to all projects contexts. We claim that collaboration and discipline can be the driver to tailor software development processes to meet projects and organizations needs. This work proposes that process tailoring can be conducted through a context management approach. © 2010 ACM.

关键词： Software design

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A Hybrid Approach with BRKGA and Data Mining for the Early/Tardy Scheduling Problem 13

A Hybrid Approach with BRKGA and Data Mining for the Early/T...

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13th IEEE Congress on Evolutionary Computation, CEC 2024

作者： Mendonça, Israel Fatyanosa, Tirana Noor Aritsugi, Masayoshi Silva, Pedro Henrique González Kumamoto University Faculty of Advanced Science and Technology Kumamoto Japan Brawijaya University Faculty of Computer Science Malang Indonesia Federal University of Rio de Janeiro System Engineering and Computer Science Program Rio de Janeiro Brazil

ISBN: (纸本)9798350308365

This paper introduces a novel hybrid genetic algorithm combined with data mining to solve a version of the early/tardy scheduling problem in which no unforced idle time may be inserted in a sequence. The chromosome representation of the problem is based on random keys and we use the Biased Random-Key Genetic Algorithm (BRKGA) to establish an order in which jobs are scheduled. A data mining component gathers data from the evolutionary steps of BRKGA and suggests chromosomes based on past observations. In this way, we address a key challenge in BRKGA - the exploration of solutions near an individual gene - by leveraging data-driven insights to refine and enhance the search space. Comparative analysis reveals that our hybrid algorithm significantly benefits from the pattern recognition capabilities of data mining, leading to improved scheduled efficiency. The results of a series of computational experiments underscore the potential of this hybrid approach that, although requiring slightly longer computational times, is better than the previous baseline BRKGA algorithm in terms of solution quality. © 2024 IEEE.

关键词： Scheduling algorithms

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