The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Thomas S. Pagano - One of the best experts on this subject based on the ideXlab platform.
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Performance characterization of the moderate resolution imaging spectroradiometer (MODIS) Engineering Model
Advanced and Next-Generation Satellites, 1995Co-Authors: Thomas S. Pagano, James B. Young, Neil J. TherrienAbstract:The MODIS instrument is currently under development at Hughes Aircraft Company, Santa Barbara Research Center. The MODIS is scheduled to fly on the Earth Observing System suite of spacecraft with the first launch in mid 1998. The MODIS Engineering Model (EM) was completed in May of 1995 and has undergone extensive performance characterization testing. This paper covers the highlights of that testing. Results from Engineering Model (EM) tests demonstrate that the MODIS instrument will meet its performance objectives, offering excellent radiometric, spatial, and spectral performance while maintaining high precision and accuracy over the mission life.
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Moderate resolution imaging spectroradiometer (MODIS) Engineering Model development
Platforms and Systems, 1995Co-Authors: Thomas S. PaganoAbstract:The moderate resolution imaging spectroradiometer is a space-based imaging spectroradiometer designed to observe small changes in Earth system processes over long periods of time. The first of several MODIS instruments is scheduled to fly on the Earth Observation System (EOS)-AM spacecraft in 1998. The Engineering Model for the MODIS is well into build and will be in system test later this year. This paper provides an overview of the MODIS instrument and highlights many of the technical achievements during the Engineering Model development. Results of subsystem testing of critical assemblies is presented indicating a high probability of success in critical performance areas at the system level.© (1995) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Norshuhada Shiratuddin - One of the best experts on this subject based on the ideXlab platform.
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VALIDATION OF MGBL Engineering Model USING GROUP TREATMENT EXPERIMENTAL STUDY
2011Co-Authors: Syamsul Bahrin Zaibon, Norshuhada ShiratuddinAbstract:A mGBL Engineering Model is proposed intentionally for developing mGBL applications and is outlined in this paper to provide novice developers with an integrated Model with which they can approach more systematically the design and development of mGBL. The Engineering Model combines a game life cycle based on iterative prototyping and learning Model, with supporting activities drawn from sources of best practice in mobile game development. This paper describes an experimental study involving the implementation of the proposed Model with a group of undergraduate students who are taking Game Application Development course. The results indicate that the proposed Model was practical and workable in developing mGBL applications compared to other Models.
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Mobile Game-Based Learning (mGBL) Engineering Model as a Systematic Development Approach
Global Learn, 2010Co-Authors: Syamsul Bahrin Zaibon, Norshuhada ShiratuddinAbstract:Various game development methodologies have been introduced for different types of games (genre, platform), which are available in their own specifications.Although there are many introduced methodologies which are currently practiced, studies show that customized phases and steps to develop mobile game-based learning (mGBL) applications are necessary.Henceforth, this paper proposes mGBL Engineering Model with phases and main steps to be followed. The Engineering Model is proposed intentionally for developing mGBL applications and is outlined in this paper to provide developers with an integrated Model with which they can approach more systematically the design and development of mGBL.The Engineering Model combines a game life cycle based on iterative prototyping and learning Model, with supporting activities drawn from sources of best practice in mobile game development.In addition, an expert review session was conducted to evaluate the proposed Model.
László Horváth - One of the best experts on this subject based on the ideXlab platform.
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Cyber Physical System in Context with System Level Engineering Model
2019 IEEE 28th International Symposium on Industrial Electronics (ISIE), 2019Co-Authors: László HorváthAbstract:Advanced industrial and consumer products are represented by Engineering Model system (EMS) which developed and applied by Engineering activities during the whole innovation and life cycle of products. By now, this smart virtual technology become essential in the area of cyber physical systems (CPSs). Because EMS serves Engineering during the whole life cycle of field operated CPS, active two-way contextual driving between EMS and cyber units of CPS offers mutual benefit. Recognizing the importance of this area, Laboratory of Intelligent Engineering Systems, Óbuda University started research in Modeling methods and Model structures to establish the above connection between virtual and field operated CPSs. This paper introduces latest results of this research in three closely related issues. These issues are extension of EMS for smart content based self-adaptive behavior, driving connections between driving content structure (DCS) extended EMS and relevant cyber units of CPS, and mutual activities between virtual and physical CPSs. In the background of the reported research, world level Modeling system serves as virtual laboratory and assists understanding recently emerged Engineering Modeling problems and solutions. Results are considered as contribution to recent efforts in smart Engineering, production and products.
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SACI - Content Driven Engineering Model System for Cyber Physical Systems
2018 IEEE 12th International Symposium on Applied Computational Intelligence and Informatics (SACI), 2018Co-Authors: László Horváth, Andrea SeresterAbstract:Engineering Model system is complex description and representation of an Engineering structure. It serves as active media for all Engineering activities during lifecycle of Engineering structure. By now, Engineering Model system is capable of representation systems operated Engineering structure and it can be configured to include organized experiments for Engineering related research and development activities. Active knowledge is represented in Engineering Model system with the demand for integration of theory and practice. Recently, systems operated Engineering structure is Modeled as cyber physical system. Consequently, Engineering Modeling capabilities must be appropriate for description and representation of cooperating systems considering cyber and physical units. Despite their suitability for Modeling systems, former analysis by the authors revealed that current Engineering Model systems would require organized knowledge background to support repeated and changed decisions on Engineering object parameters in description and representation of Engineering structure. To establish this background, former research introduced and defined a new concept called as information content. Model structure of information content was established as new integrated unit of Engineering Model system. Purpose of this paper is to introduce recent research results in rethinking and restructuring of information content for Engineering Model system which describe and represent cyber physical system. For that reason, extended Engineering Model system is given to answer how cyber physical system changes demand for information content in Engineering Model system. This is followed by introduction and discussion of cyber physical system eligible extended structure of information content representations. Connections are defined between information content and cyber physical system. Finally, implementation issues are discussed.
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Engineering Model System Definition Using Human Initiatives
2018 World Automation Congress (WAC), 2018Co-Authors: László HorváthAbstract:Interaction between engineer and Model generation procedures is one of the key areas in intelligent Engineering system (ES) methodology. One of the main problems at recent advanced Engineering Model (EM) definition is that the demanded intent based, and knowledge intensive human initiatives are challenging to communicate with complex, active and self-adaptive EM. Initiative provides controlled contextual effect on EM in collaborative environment (CE). Human initiatives are undergone coordination considering former decisions, human expertise, discipline relevance, and human role in active EM. Recently, classical EM is completed by representation of cooperating systems. This is enforced by Engineering object configurations (EOCs) which operate as multidisciplinary cyber-physical systems (CPSs). EM is supposed to support the whole innovation and life cycle of system operated industrial EOC. This paper introduces contribution to efforts in development of human initiative representation for the above environment. It shows and discusses new initiative structure as Model representation of content background (CB) behind EOC information. The proposed initiative structure is suitable to drive downstream levels of CB structure. CB structure drives components and features in requirements, functional, logical, and physical (RFLP) structured EM.
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Content Driven Engineering Model System for Cyber Physical Systems
2018 IEEE 12th International Symposium on Applied Computational Intelligence and Informatics (SACI), 2018Co-Authors: László Horváth, Andrea SeresterAbstract:Engineering Model system is complex description and representation of an Engineering structure. It serves as active media for all Engineering activities during lifecycle of Engineering structure. By now, Engineering Model system is capable of representation systems operated Engineering structure and it can be configured to include organized experiments for Engineering related research and development activities. Active knowledge is represented in Engineering Model system with the demand for integration of theory and practice. Recently, systems operated Engineering structure is Modeled as cyber physical system. Consequently, Engineering Modeling capabilities must be appropriate for description and representation of cooperating systems considering cyber and physical units. Despite their suitability for Modeling systems, former analysis by the authors revealed that current Engineering Model systems would require organized knowledge background to support repeated and changed decisions on Engineering object parameters in description and representation of Engineering structure. To establish this background, former research introduced and defined a new concept called as information content. Model structure of information content was established as new integrated unit of Engineering Model system. Purpose of this paper is to introduce recent research results in rethinking and restructuring of information content for Engineering Model system which describe and represent cyber physical system. For that reason, extended Engineering Model system is given to answer how cyber physical system changes demand for information content in Engineering Model system. This is followed by introduction and discussion of cyber physical system eligible extended structure of information content representations. Connections are defined between information content and cyber physical system. Finally, implementation issues are discussed.
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Representation of intellectual property for multidisciplinary industrial Engineering Model system
2016 IEEE 25th International Symposium on Industrial Electronics (ISIE), 2016Co-Authors: László HorváthAbstract:One of the most dynamically developing applications of industrial electronics is active representation of product information in cyber-physical systems for high level Engineering problem solving. Recently, Modeling in industrial product lifecycle management (PLM) systems was extended to higher abstraction as the conventional physical level. Long way on development of integrated, active knowledge driven, and intelligent computing based Engineering problem solving reached application of high level multidisciplinary Model and integration of this Model with physical world objects. Systems Engineering (SE) based Model represents systems which drive a product and serves Engineering activities for product lifecycle. For this purpose, four leveled RFLP Model structure serves representation of requirements against product (R), function structure to fulfill the requirements (F), logical structure of product (L), and feature driven structure of physical product objects (P). In the meantime, represented active knowledge is being integrated gradually into organized intellectual property (IP) of company. Laboratory of Intelligent Engineering Systems (LIES) of Óbuda University recognized the above development and initiated research in active IP driven and high abstraction based Modeling of complex industrial products. In the scope of this work, the initiative (I), behavior (B), context (C), and action (A) structure was proposed as representation of driving knowledge content (DKC) for application at generation of elements and features in RFLP structured product Model. In this paper, elements and connections of system based product Model is outlined. Next, the IBCA structure is introduced using levels of abstraction and connections of its elements. Following this, the question is attempted to answer that how DKC can effectively contribute to IP. Finally, implementation issues are discussed.
Xiaoping Huang - One of the best experts on this subject based on the ideXlab platform.
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an Engineering Model of fatigue crack growth under variable amplitude loading
International Journal of Fatigue, 2008Co-Authors: Xiaoping Huang, Moan TorgeirAbstract:Fatigue crack growth in structure components subjected to variable amplitude loading is a very complex subject. Many Models have been proposed, but as yet no universal Model exists. In this paper, the concept of an equivalent stress intensity factor (SIF) range corresponding to R = 0 and a modified Wheeler Model are introduced. These innovations lead to a fatigue life prediction Model that depends mainly on the stress ratio and the plastic zone size ahead of the crack tip. This Model also describes the phenomena of retardation and arrest due to overload, and the acceleration due to a state of underload following an overload. The plastic zone size ahead of the crack tip is Modeled as a continuous function of the maximum applied SIF, yield strength, and plate thickness, making its calculation precise and easy. The proposed Model is validated using experimental fatigue crack growth data in 7075-T6 and 2024-T3 aluminum alloys and 350WT steel under various overload, underload, and spectrum loadings published in the literature. The predicted results are in good agreement with these test data.
Georgy Shashurin - One of the best experts on this subject based on the ideXlab platform.
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Engineering Model of crack development in metals and alloys under corrosive hydrogenous media
Journal of Machinery Manufacture and Reliability, 2014Co-Authors: A. N. Romanov, Pavel V Tarakanov, Georgy ShashurinAbstract:The number of constructions with elements that are directly exposed to corrosive hydrogenous media is growing all over the world. This is why the problems of the design of Engineering Models of crack development in the elements of machines and constructions continuously affected by corrosive hydrogenous media are urgent. As compared to all other aspects of Engineering Modeling, special attention is being paid to approaches to the construction of kinetic energy charts of crack growth that are considered the main Engineering tool of service life forecasting for elements that develop cracks. One such approach is described below.
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numerical life estimation of structure components subjected to hydrogen embrittlement and cycling
Key Engineering Materials, 2013Co-Authors: Pavel V Tarakanov, Aleksander Romanov, Georgy ShashurinAbstract:Engineering Models to estimate a life of structure components which are simultaneously subjected to aggressive hydrogen environment influence and cycling, substantially, use two different approaches to problem-solving, i.e. the influence of aggressive hydrogen environment on material and the fatigue. A developed Engineering Model to estimate the life of structure components assumes that either the influence of aggressive hydrogen environment, or the fatigue initiates a local fracture of structure component. The Engineering Model enables a calculating of a structure component life.
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crack propagation Engineering Model stress intensity dependence of crack growth rate in hydrogen embrittlement material
ECF19, 2013Co-Authors: Pavel A Tarakanov, Georgy ShashurinAbstract:Based on various mechanisms of hydrogen diffusion in metals, different crack propagation Models and stress intensity dependence of crack growth rate have been developed. Engineering Model of another hydrogen-assisted cracking in metal materials is presented in this paper. This Model is based on simultaneous solution of two various problems: diffusion of hydrogen in metal problem and fracture mechanics problem. Special characteristic, which bonds material and environment, is introduced to colligate these two problems together in proposed Model. Engineering Model is discontinuous in the present case. The value of crack growth is not a constant. Crack moves out when the concentration of hydrogen in the crack tip reaches maximum permissible value. This magnitude is chosen from the special characteristic mentioned above. The stress intensity dependence of crack growth rate, calculated by authors, has a good correlation with Panasyuk`s experimental data. Introduction Hydrogen embrittlement is a form of environmentally assisted failure which is caused by the action of hydrogen often in combination with stress resulting in the reduction of the load bearing capacity of a component. The problem of hydrogen embrittlement in metal alloys is converged in various types of machine components. There are pipelines for oil and gas transportation, significant components of power plants, such as steam generator tubes boilers, steam/water pipe lines among them. Hydrogen embrittlement was main cause accident of fuel cladding in nuclear reactors (Caskey et al 1962), cracking of fossil fuel boilers tubes (Weiss 1993; Speidel & Atrenes 1984; Metals handbook 1987), retaining rings of generator rotors (Speidel &Atrenes 1984), waterside components of condensers (Metals handbook 1987) and in many other components where there is a possibility of hydrogen ingress in the material. These various components are made from metallic alloys, for example, based on Fe, Ni, Al, Ti, Zr, Ta, which are responsive to hydrogen embrittlement. Hydrogen embrittlement has a pernicious influence on life of the mentioned above machine components. There are many well-known researches and various theories (Panasyuk 1981, Cherepanov 1973, Matvienko 2004), which estimate life of a machine component and structures by means of specific crack propagation Engineering Models. Therefore crack propagation Engineering Model of hydrogen embrittlement material research is one of the modern mechanics technical problems. In this paper one of the possible variant of Engineering Model, which describes the crack growth in hydrogenation structure, is presented. Results, calculated by authors, by means of this Model have a good correlation with the experimental data (Panasyuk 1988). Crack propagation Engineering Model: structure Hydrogen penetrates into material through the material-environment interface due to diffusion process. This process is dependent on different variables: temperature, hydrogen concentration, mechanical properties of material etc. There are many various theories, which describe the mechanisms of hydrogen penetration into material [1-10]. Each theory explains some experimental observations. Pressure theory (Zappfe & Sims 1941), Surface adsorption theory (McMahon C J Jr,Vitek V 1979), Decohesion theory (Oriani & Josephic, 1974), Hydrogen enhanced localized plasticity mechanism (Sirois & Birnbaum, 1992), Hydride theory (Matvienko 2004) are well known theories of hydrogen embrittlement of solid materials. In case of unidirectional diffusion and tension of a sample, hydrogen penetration into material describes by Eq. 1. Boundary and initial conditions are presented below too.