346 results on '"IGES"'
Search Results
2. Data Exchange with Support for the Neutral Processing of Formats in Computer-Aided Design/Computer-Aided Manufacturing Systems.
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Kuryło, Piotr, Frankovský, Peter, Malinowski, Marek, Maciejewski, Tomasz, Varga, Ján, Kostka, Ján, Adrian, Łukasz, Szufa, Szymon, and Rusnáková, Svetlana
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CAD/CAM systems ,MANUFACTURING processes ,GEOMETRIC modeling ,TEST systems ,ISOGEOMETRIC analysis - Abstract
This paper presents an analysis and the research results of system couplers in CAx systems that ensure the correct transfer of product data from the "supplier" system to the "recipient" system. This study presents the results of the compatibility tests between the systems based on the verification of geometric models and their attributes after importing/exporting 2D and 3D objects using neutral data exchange formats. The purpose of the research was to identify neutral formats that do not introduce errors after data transversion in certain types of geometry. Tests and analyses were carried out on selected formats depending on the type of object, such as 2D objects (DXF), solid objects (IGES, STEP, SAT, and PARASOLID), and surface objects (IGES, STEP, SAT, and X_T). One of the results of our research and analysis is the need for continuous development of CAD/CAE systems because current neutral formats are not 100% effective. [ABSTRACT FROM AUTHOR]
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- 2023
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3. Immunological Hypersensitivities: Allergy and Autoimmunity
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Carlberg, Carsten, Velleuer, Eunike, Carlberg, Carsten, and Velleuer, Eunike
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- 2022
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4. Data Exchange with Support for the Neutral Processing of Formats in Computer-Aided Design/Computer-Aided Manufacturing Systems
- Author
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Piotr Kuryło, Peter Frankovský, Marek Malinowski, Tomasz Maciejewski, Ján Varga, Ján Kostka, Łukasz Adrian, Szymon Szufa, and Svetlana Rusnáková
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CAD ,data exchange ,data format ,CAx ,DXF ,IGES ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
This paper presents an analysis and the research results of system couplers in CAx systems that ensure the correct transfer of product data from the “supplier” system to the “recipient” system. This study presents the results of the compatibility tests between the systems based on the verification of geometric models and their attributes after importing/exporting 2D and 3D objects using neutral data exchange formats. The purpose of the research was to identify neutral formats that do not introduce errors after data transversion in certain types of geometry. Tests and analyses were carried out on selected formats depending on the type of object, such as 2D objects (DXF), solid objects (IGES, STEP, SAT, and PARASOLID), and surface objects (IGES, STEP, SAT, and X_T). One of the results of our research and analysis is the need for continuous development of CAD/CAE systems because current neutral formats are not 100% effective.
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- 2023
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5. LOS IGES y la investigación formativa en el programa de contaduría pública
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Uribe Delgado, Luz Marina, Méndez Suárez, Patricia, Jaime Acevedo, Jhon, Uribe Delgado, Luz Marina, Méndez Suárez, Patricia, and Jaime Acevedo, Jhon
- Abstract
Following the Pedagogical Model of Unidades Tecnólogicas de Santander - (UTS Board of Directors, 2020), it proposes collaborative learning as a didactic strategy, where teaching-learning strategies are interrelated, and students are empowered to express freely their ideas, and thoughts and recognize the other as equals; and to the teacher to propose teaching strategies according to the institutional approaches, selecting problems to solve in the business context, allowing the student to suggest possible solutions. Based on the above, it is supposed to argue through a documental analysis of the importance of Business Management Innovations (BMI), as a strategy that favors formative research in students and teachers, within the framework of classrooms in the Public Accounting program articulated by cycles. propaedeutics with the Technology program in Accounting Information Management of the; For this, the BMI carried out in the last 5 years was analyzed, which impacted approximately 310 service companies, 256 commercial companies, and 168 manufacturing companies, which were implemented by teachers in different courses of the curriculum, to determine how the BMI contributes to research training on students and teachers, allowing business development in the region based on the axes of accounting, financial, regulatory and organizational training. The foregoing made this easier the evidence of the materialization of the institutional proposal concerning teaching-learning strategies; the implementation of students in solving problems in the productive sector, and the articulation between teaching and research in the classroom., Seguindo o Modelo Pedagógico de Unidades Tecnológicas de Santander- (Unidades Tecnológicas de Santander [UTS], 2020), propõe a aprendizagem colaborativa como estratégia didática, onde as estratégias de ensino-aprendizagem estão interligadas e capacita os alunos a expressarem livremente ideias, pensamentos e reconhecer seus pares; e o professor propor estratégias de acordo com a abordagem institucional, selecionando problemas a serem resolvidos no contexto empresarial, permitindo ao aluno sugerir possíveis soluções. De acordo com o exposto, pretende-se argumentar através da análise documental a importância das Inovações em Gestão Empresarial -IGES-, como estratégia que favorece a investigação formativa em alunos e professores, no âmbito das salas de aula do programa de contabilidade pública articuladas através de preparatórios. ciclos com o programa tecnológico em gestão de informação contabilística das Unidades Tecnológicas do Santander; Para o efeito, foram analisados os IGES realizados nos últimos 5 anos, que impactaram cerca de 310 empresas de serviços, 256 empresas comerciais e 168 empresas transformadoras, que foram implementados por professores em diferentes cursos do currículo, de forma a determinar como o IGES contribuir para a formação científica de alunos e professores, permitindo o desenvolvimento empresarial da região apoiado nos eixos da formação em contabilidade financeira, regulatória e organizacional. O exposto facilitou a demonstração da materialização da proposta institucional quanto às estratégias de ensino-aprendizagem; a atuação dos alunos na resolução de problemas do setor produtivo e a articulação entre ensino e pesquisa em sala de aula., Siguiendo el Modelo Pedagógico de Unidades Tecnológicas de Santander- (Unidades Tecnológicas de Santander [UTS], 2020), propone como estrategia didáctica el aprendizaje colaborativo, en donde se interrelacionan las estrategias de enseñanza - aprendizaje y potencia a los estudiantes a la libre expresión de ideas, pensamientos y a reconocer sus pares; y al docente a proponer estrategias en concordancia con el enfoque institucional, seleccionando problemas a resolver en el contexto empresarial, permitiendo en el estudiante sugerir soluciones posibles. Acorde con lo anterior, se pretende argumentar mediante análisis documental la importancia de las Innovaciones de Gestión Empresarial –IGES-, como estrategia que favorece la investigación formativa en estudiantes y docentes, en el marco de las aulas de clase en el programa de contaduría pública articulado por ciclos propedéuticos con el programa de tecnología en manejo de la información contable de las Unidades Tecnológicas de Santander; para ello se analizaron los IGES realizados en los últimos 5 años, que impactaron aproximadamente a 310 empresas de servicios, 256 empresas comerciales y 168 empresas manufactureras, los cuales fueron implementados por los docentes en diferentes cursos del plan de estudios, con el fin de determinar cómo los IGES contribuyen en la formación investigativa en estudiantes y docentes permitiendo el desarrollo empresarial de la región apoyados en los ejes de formación contable financiero, regulación y organizacional. Lo anterior, facilito evidenciar la materialización de la propuesta institucional en lo referido a las estrategias de enseñanza aprendizaje; el desempeño de los estudiantes en la solución de problemas del sector productivo y la articulación entre la docencia y la investigación en el aula de clase.
- Published
- 2024
6. Vessel: Efficient Plain Text File Format for Ship Hull Geometry
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Degtyarev, Alexander, Gankevich, Ivan, Gavrikov, Anton, Grigorev, Artemii, Khramushin, Vasily, Petriakov, Ivan, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Misra, Sanjay, editor, Gervasi, Osvaldo, editor, Murgante, Beniamino, editor, Stankova, Elena, editor, Korkhov, Vladimir, editor, Torre, Carmelo, editor, Rocha, Ana Maria A.C., editor, Taniar, David, editor, Apduhan, Bernady O., editor, and Tarantino, Eufemia, editor
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- 2019
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7. Apport de la biologie dans le diagnostic d'allergie immédiate.
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Savoye, Benjamin, Berger, Anne-Emmanuelle, Le Mauff, Brigitte, Lambert, Claude, and le groupe AllergoBioNet, pour
- Abstract
L'allergie par hypersensibilité immédiate correspond à des manifestations aigues variées et peut poser des difficultés diagnostiques pour l'identification de l'allergène en cause et le suivi. En support de l'approche du clinicien, le biologiste propose des outils pour confirmer la nature de l'allergène et le caractériser au niveau moléculaire par l'analyse des spécificités reconnues par les IgE du patient. Cela permet de confirmer le diagnostic, d'évaluer les risques et les potentielles réactivités croisées. L'identification des composants peut aussi consolider la mise en place d'une immunothérapie et contribuer à son suivi. Dans le cas d'une réaction anaphylactique, la mesure des médiateurs libérés (tryptase et éventuellement histamine) confirme l'activation des mastocytes et/ou basophiles dont le facteur déclenchant sera à déterminer dans un second temps. Des kits de prélèvement peuvent faciliter la procédure dans les situations d'urgence. En cas de doute diagnostique et d'un risque à l'exposition à l'allergène dans un test de provocation, le test d'exploration fonctionnelle pourra être réalisé in vitro, en toute sécurité, sur les basophiles du patient. L'exploration biologique est un complément à l'analyse du clinicien et doit être menée en partenariat de façon à ne pas semer le doute devant la détection d' IgE qui ne traduit qu'une sensibilisation somme toute fréquente, par rapport à l'allergie qui est une entité clinique potentiellement grave. Immediate allergy has various clinical manifestations and can create difficulties during the diagnostic to properly identify the responsible allergen and monitor the disease. To help the allergologist, the biologist can offer lab tests to confirm the nature of the allergen and to better molecularly define it through analysis of the components recognized by patient IgEs. This strategy allows diagnosis confirmation, risk assessment and potential cross-reaction identification. Component analysis is also helpful to set up and monitor specific allergen immunotherapy. In anaphylactic reactions, measuring mediator release (tryptase and histamine if necessary) can confirm mastocyte and/or basophil activation, the triggering agent being identified later. Ready-to-use blood sampling kits may make the procedure easier in an emergency. In the event of an uncertain diagnosis and if suspected allergen exposure in a provocation test is too harmful for the patient, functional tests can be performed in vitro using patient blood basophil in complete safety. Biologic tests can therefore contribute to the clinician's diagnosis. It should be conducted in a complete partnership in order not to cast doubt in the case of IgE detection, which remains a common situation, unlike allergy that is a disease with potential serious complications. [ABSTRACT FROM AUTHOR]
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- 2020
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8. Semantic Representation of CAD Models Based on the IGES Standard
- Author
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Bermeo, Nestor Velasco, Mendoza, Miguel González, Castro, Alexander García, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Castro, Félix, editor, Gelbukh, Alexander, editor, and González, Miguel, editor
- Published
- 2013
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9. Preparation of CAD and Molecular Surfaces for Meshfree Solvers
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Randrianarivony, Maharavo, Brunnett, Guido, Barth, Timothy J., editor, Griebel, Michael, editor, Keyes, David E., editor, Nieminen, Risto M., editor, Roose, Dirk, editor, Schlick, Tamar, editor, and Schweitzer, Marc Alexander, editor
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- 2008
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10. Harmonic Variation of Edge Size in Meshing CAD Geometries from IGES Format
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Randrianarivony, Maharavo, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Bubak, Marian, editor, van Albada, Geert Dick, editor, Dongarra, Jack, editor, and Sloot, Peter M. A., editor
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- 2008
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11. Reverse Engineering: A Review & Evaluation of Contact Based Systems
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Desai, Salil, Bidanda, Bopaya, Parsaei, Hamid R., editor, Kamrani, Ali, editor, and Nasr, Emad Abouel, editor
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- 2006
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12. IGES Standard Protocol for Feature Recognition CAD System
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Nasr, Emad Abouel, Kamrani, Ali, Parsaei, Hamid R., editor, Kamrani, Ali, editor, and Nasr, Emad Abouel, editor
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- 2006
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13. Sustained CAD/CAE integration: integrating with successive versions of step or IGES files.
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Kirkwood, Robert and Sherwood, James
- Abstract
CAD/CAM/CAE integration offers designers, analysts, and manufacturers the opportunity to share data throughout the product development process. Such integration reduces product development cost and supports the development of better products. Finite-element (FE) meshing applications integrated with solid model data from CAD systems represent a major subset of CAD/CAM/CAE integration. Many practitioners find that sustained integration with the CAD geometry is often not economical because of mixed CAD formats and the need to simplify geometry before modeling. This article assesses those circumstances and the cost/benefit trade-offs that lead to the not-economical conclusion. The article also introduces new techniques for sustained integration with FE meshing applications. Virtual persistent identifiers (VPI) enabled by design change vectors (DCV) are proposed as tools to enable sustained integration between FE meshing applications and imported neutral format CAD models (e.g., STEP, IGES). VPI techniques are shown to enable sustained integration using neutral format files with no extensions to their current format. The approach accommodates 'integrate as you go' (ad-hoc integration) instead of the homogeneous integration approach that requires extensive planning, investment, and policies. The same ad-hoc capability can be used to repair broken associativity and mitigate risks associated with migrating from one CAD platform to another. The authors conclude that VPI should be useful for ad-hoc integration, integration repair, and migration to new exchange standards like the feature definition standard in STEP AP-242. A simple example of the proposed process is shared. [ABSTRACT FROM AUTHOR]
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- 2018
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14. Classification of Features Considering Their Machinability and Factory Facilities for Computer Aided Process Planning
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Bouzakis, K. D., Andreadis, G., Kaliszky, Sandor, editor, Sayir, Mahir, editor, Schneider, Wilhelm, editor, Bianchi, Giovanni, editor, Tasso, Carlo, editor, and Kuljanic, Elso, editor
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- 1999
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15. A Nonparametric Nonclassical Measurement Error Approach to Estimating Intergenerational Mobility Elasticities
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Yonghong An, Le Wang, and Ruli Xiao
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Statistics and Probability ,Economics and Econometrics ,Observational error ,Inequality ,media_common.quotation_subject ,05 social sciences ,Nonparametric statistics ,IGES ,computer.file_format ,Social mobility ,01 natural sciences ,010104 statistics & probability ,0502 economics and business ,Econometrics ,Economics ,0101 mathematics ,Statistics, Probability and Uncertainty ,computer ,Social Sciences (miscellaneous) ,050205 econometrics ,media_common - Abstract
This article provides a framework for estimating intergenerational mobility elasticities (IGEs) of children’s income with respect to parental income. We allow the IGEs to be heterogeneous, by leavi...
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- 2020
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16. Japan–India Technology Matchmaking Platform: Approach to Promote Japanese Low Carbon Technologies in Indian Industries
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Prosanto Pal and Abdessalem Rabhi
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Knowledge management ,Scope (project management) ,business.industry ,Agriculture ,Information sharing ,Developing country ,IGES ,computer.file_format ,Small and medium-sized enterprises ,Empirical evidence ,business ,computer ,Mathematics - Abstract
This paper details the efforts made by Institute for Global Environmental Strategies (IGES) and The Energy and Resources Institute (TERI), under their Japan–India collaborative projects, to promote low carbon technologies (LCT) among small and medium enterprises (SMEs) in India. The empirical evidence gathered during the projects show that three key barriers hinder faster adoption of Japanese LCT among the Indian SMEs: (i) information and knowledge gaps; (ii) networking and communication challenges; (iii) higher cost of the LCT. To bring stakeholders from the two countries together, a multi-stakeholder platform called Japan–India Technology Matchmaking Platform (JITMAP) was developed. The paper outlines how JITMAP, through its online information sharing and on the ground activities, is addressing some of the barriers by promoting awareness enhancement, arrangement of business meetings, study on LCT application (feasibility studies), access to financial schemes, and arrangement of policy and regulatory discussions. There is ample scope to scale-up the JITMAP activities and replicate it as a model for LCT cooperation between other developed and developing countries.
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- 2019
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17. The Intergenerational Transmission of Family-Income Advantages in the United States
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Michael Weber, Victoria L. Bryant, and Pablo A. Mitnik
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Intergenerational transmission ,Inequality ,Economic Mobility ,media_common.quotation_subject ,Income Inequality ,Economic mobility ,Intergenerational Elasticity ,lcsh:HM401-1281 ,General Social Sciences ,IGES ,computer.file_format ,Family income ,Economic advantage ,lcsh:Sociology (General) ,Economic inequality ,Equality Of Opportunity ,Administrative Data ,Economics ,Demographic economics ,computer ,Intergenerational Transmission Of Economic Advantages ,media_common - Abstract
Estimates of economic persistence and mobility in the United States, as measured by the intergenerational elasticity (IGE), cover a very wide range. Nevertheless, careful analyses of the evidence suggested until recently that as much as half, and possibly more, of economic advantages are passed on from parents to children. This 'dominant hypothesis' was seriously challenged by the first-ever study of family-income mobility based on tax data (Chetty et al. 2014), which provided estimates of family-income IGEs indicating that only one-third of economic advantages are transmitted across generations and claimed that previous highly influential IGE estimates were upward biased. Using a different tax-based data set, this article provides estimates of family-income IGEs that strongly support the dominant hypothesis. The article also carries out a one-to-one comparison between IGEs estimated with the two tax-based data sets and shows that Chetty et al.'s estimates were driven downward by a combination of attenuation, life-cycle, selection, and functional-form biases. Lastly, the article determines the exact relationship between parental income inequality, economic persistence, and inequality of opportunity for income. This leads to the conclusion that, in the United States, at least half of income inequality among parents is transformed into inequality of opportunity among their children.
- Published
- 2019
18. Quick segmentation for complex curved surface with local geometric feature based on IGES and Open CASCADE.
- Author
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Wang, Fu-ji, Ma, Jian-wei, Xu, Qiang, Jia, Zhen-yuan, and Yang, Yan-yu
- Subjects
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CURVED surfaces , *IMAGE segmentation , *GRAPHICS processing units , *MACHINING , *PARAMETER estimation - Abstract
Complex curved surface parts with local geometric feature are usually critical parts in high-end equipments. However, the processing for this kind of parts is usually difficult or inefficient due to the adoption of difficult-to-machine material and special structure. Current approaches cannot satisfy the rapid development of high-end equipments. Due to the existence of the local geometric feature for the parts, processing such parts with constant machining parameters is less applicative, restricting the improvement of machining efficiency. By separating the local geometric feature and generating tool path for the local geometric feature and the remaining processing area separately, the more efficient machining with variable machining parameters will be obtained for the complex curved surface with local geometric feature. In this way, the quick segmentation for the complex curved surface with local geometric feature is of great importance to the NC machining with variable machining parameters for this kind of parts, and a quick segmentation system is developed based on Initial Graphics Exchange Specification (IGES) and Open CASCADE (OCC) platform in this study. The complex curved surface model in IGES format is firstly imported into the system and then trimmed into independent surface patches. After computing the feature size of each surface patch, the segmentation for the complex curved surface is achieved by sorting and classifying the surface patches according to their feature sizes. Taking the whole impeller with small splitter blades for an example, the experimental result shows that the segmentation of small splitter blades from the whole impeller is successful and a serialized processing program could be generated, and then the whole impeller could be machined precisely and efficiently with NC equipment. In the machining experiment, it is proved that the machining with various machining parameters can improve the efficiency by 28.18% in the comparison experiment, 20.14% and 12.33% in the estimation. The research provides an important foundation for the high quality and more efficient machining of the complex curved surface with local geometric feature. [ABSTRACT FROM AUTHOR]
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- 2015
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19. Semantic Enrichment of 3D Models Based on Ontology Integration
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Benoît Eynard, Sébastien Remy, Stephane Nzetchou, Alexandre Durupt, Roberval (Roberval), Université de Technologie de Compiègne (UTC), Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée (LASMIS), Université de Technologie de Troyes (UTT), and ANR-16-CE38-0005,RESEED,Rétro-conception SémantiquE d'objEts patrimoniaux Digitaux(2016)
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0209 industrial biotechnology ,Exploit ,Emerging technologies ,Computer science ,media_common.quotation_subject ,02 engineering and technology ,IGES ,010501 environmental sciences ,Ontology (information science) ,PLM ,01 natural sciences ,World Wide Web ,[SPI]Engineering Sciences [physics] ,020901 industrial engineering & automation ,CAD ,Semantic representation ,Function (engineering) ,ComputingMilieux_MISCELLANEOUS ,0105 earth and related environmental sciences ,media_common ,Ontology ,File format ,computer.file_format ,[SPI.MECA.GEME]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanical engineering [physics.class-ph] ,Data access ,Order (business) ,computer - Abstract
The rise of new technologies has led to a growth in the number of 3D models. They can come from various source, hence they are heterogeneous and complex. The level of 3D data access is often a function of the user’s expertise since the 3D data are often registered to different file formats. Some file formats do not show the data tree, as IGES. For using information inside a 3D model, that does not show a data tree, each company adopts his own system that will allow him to access easily to 3D model in order to exploit the hidden knowledge within the models. In this article, we are going to speak about technologies that helps user to exploit and knowledge coming from different file formats. In addition, we are going to present a system named VAQUERO that uses ontology to access, store and share knowledge coming from 3D models.
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- 2021
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20. Promoting CO2 Water Source Heat Pumps in Indian Industrial Sector
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Abdessalem Rabhi and Ananda Mohan Ghosh
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Greening Business ,Waste management ,Primary energy ,Natural refrigerant ,Secondary sector of the economy ,Water source ,Environmental science ,IGES ,computer.file_format ,computer - Abstract
The electric CO2 water source heat pumps (EHP) generate hot water and cold water simultaneously using the trans-critical cycle of the natural refrigerant CO2. Since their introduction in 2001, EHP were regarded as the next generation of low carbon technologies. The results from piloting EHP at two diary plants, one in Anand, Gujarat and other in Chandigarh, Punjab in India, by the Institute for Global Environmental Strategies (IGES) and The Energy and Resources Institute (TERI) revealed that a potential of 30-50% primary energy saving is possible depending upon the unit level existing scenario. Consequently, a potential CO2 emission reduction up to 180 tons/year. On impact analysis of installing EHP of similar capacity at fifty (50) dairy plants in both the states of Gujarat and Punjab, the authors found that the replications could result in equivalent primary energy saving of 952 toe/year, and a reduction in CO2 emissions of 3,128 ton/year. EHP are ideal not only for dairy industries but also for applications that require both hot water and cold water regularly; therefore, significant potential exists for implementing them in the Indian Industrial sector. To tap such potential, the authors call for addressing three types of barriers which were observed: 1) High initial investment cost; 2) Lack of awareness about EHP, and 3) Limited technical capacity on how to operate and maintain EHP. To overcome the financial barriers, the authors recommend the use of existing financial schemes, including the financing under the credit scheme initiated by Japan International Cooperation Agency (JICA) and Small Industries Development Bank in India (SIDBI). To overcome the lack of awareness and to develop the technical capacities regarding EHP, the authors recommend the use of the Japan-India Technology Matchmaking Platform, which was initiated to promote Japanese Low carbon technologies in India.
- Published
- 2021
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21. Earnings Dynamics and Intergenerational Transmission of Skill
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Youngmin Park and Lance Lochner
- Subjects
Intergenerational transmission ,Earnings ,education ,IGES ,computer.file_format ,Social mobility ,behavioral disciplines and activities ,Earnings inequality ,Dynamics (music) ,Economics ,Demographic economics ,Potential output ,Productivity ,computer - Abstract
This paper develops and estimates a two-factor model of intergenerational skill transmission when earnings inequality reflects differences in individual skills and other non-skill shocks. We consider heterogeneity in both initial skills and skill growth rates, allowing variation in skill growth to change over the lifecycle. Using administrative tax data on two linked generations of Canadians covering 37 years, we exploit covariances in log earnings (at different ages) both across and within generations to identify and estimate the intergenerational correlation structure for initial skills and skill growth rates, lifecycle skill growth profiles, and the dynamics of non-skill earnings shocks. We estimate low intergenerational elasticities (IGEs) for earnings in Canada (less than 0.2, even when based on 5- and 9-year average earnings); however, skill IGEs are typically 2-3 times larger due to considerable (and persistent) variation in earnings conditional on skills. Both earnings and skill IGEs decline substantially for more recent cohorts and are lower for children born to younger fathers. We estimate significant heterogeneity in both initial skills and skill growth rates, showing that intergenerational transmission of these factors explains up to 40% of children's skill variation. Skills become a more important determinant of earnings over the first part of workers' careers, while intergenerational transmission of skills becomes less important with age. Although "inherited" initial skills (compared to skill growth) are a more important determinant of children's skills throughout their lives, parents' initial skills and skill growth rates are equally important determinants of children's skills, largely because both strongly influence children's initial skills. Finally, we study intergenerational mobility for the 35 largest cities in Canada, determining the extent to which considerable differences in earnings and skill IGEs vary with the extent of local heterogeneity in parental skills vs. earnings instability.
- Published
- 2020
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22. Reduction of greenhouse gases (GHGs) and short-lived climate pollutants (SLCPs) from municipal solid waste management (MSWM) in the Philippines: Rapid review and assessment
- Author
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Eligio T. Ildefonso, Matthew Hengesbaugh, Rajeev Kumar Singh, Liz C. Silva, Albert Altarejos Magalang, S.N.M. Menikpura, Maria Delia Cristina M. Valdez, and Dickella Gamaralalage Jagath Premakumara
- Subjects
Greenhouse Effect ,Municipal solid waste ,Philippines ,020209 energy ,Waste collection ,02 engineering and technology ,IGES ,010501 environmental sciences ,Solid Waste ,01 natural sciences ,Greenhouse Gases ,Waste Management ,0202 electrical engineering, electronic engineering, information engineering ,National Policy ,Waste Management and Disposal ,Environmental planning ,0105 earth and related environmental sciences ,Sustainable development ,Capacity building ,computer.file_format ,Refuse Disposal ,Work (electrical) ,Greenhouse gas ,Environmental science ,Environmental Pollutants ,computer - Abstract
Municipal solid waste management (MSWM) is considered one of the serious environmental issues in the Philippines, with corresponding linkages to the climate change and Sustainable Development Goals (SDGs). However, methane (CH4) linked with indiscriminate dumping of municipal solid waste has received the much attention with regard to public health and climate change. The impacts of black carbon (BC) are less documented and understood. This paper aims to review the status of MSWM in the Philippines and makes efforts to assess the scale of short-lived climate pollutants (SLCPs), including both CH4, and BC, associated with the country’s waste sector. Utilising available national level data and following a life-cycle assessment (LCA) approach, the paper offers preliminary projections of SLCP emissions resulting from present MSWM practices. In addition, it examines model mitigation scenarios based on priority actions identified within the country’s national policy on waste management, Republic Act 2003 (RA 9003). Data analysis was conducted using an Emission Quantification Tool (EQT) developed by the Institute for Global Environmental Strategies (IGES) through its work under the Climate and Clean Air Coalition (CCAC) – Municipal Solid Waste Initiative (MSWI). Following a summary of key findings, the paper affirms that control of methane from disposal practices and of BC from waste collection and open burning requires urgent attention in the Philippines. Continued awareness raising, institutionalising regulatory policies on SLCPs, and further enhancing data collection and capacity building on waste-related BC emissions remain key priorities for the country.
- Published
- 2018
- Full Text
- View/download PDF
23. Increased developmental density decreases the magnitude of indirect genetic effects expressed during agonistic interactions in an insect
- Author
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Jakob Ulcik, Chang S. Han, Cristina Tuni, and Niels Jeroen Dingemanse
- Subjects
0106 biological sciences ,0301 basic medicine ,media_common.quotation_subject ,IGES ,Biology ,Affect (psychology) ,010603 evolutionary biology ,01 natural sciences ,Competition (biology) ,03 medical and health sciences ,Cricket ,Social cognition ,Genetics ,Agonistic behaviour ,medicine ,Ecology, Evolution, Behavior and Systematics ,media_common ,Aggression ,Gryllus bimaculatus ,computer.file_format ,biology.organism_classification ,030104 developmental biology ,Evolutionary biology ,medicine.symptom ,General Agricultural and Biological Sciences ,computer - Abstract
The expression of aggression depends not only on the direct genetic effects (DGEs) of an individual's genes on its own behavior, but also on indirect genetic effects (IGEs) caused by heritable phenotypes expressed by social partners. IGEs can affect the amount of heritable variance on which selection can act. Despite the important roles of IGEs in the evolutionary process, it remains largely unknown whether the strength of IGEs varies across life stages or competitive regimes. Based on manipulations of nymphal densities and > 3000 pair-wise aggression tests across multiple life stages, we experimentally demonstrate that IGEs on aggression are stronger in field crickets (Gryllus bimaculatus) that develop at lower densities than in those that develop at higher densities, and that these effects persist with age. The existence of density-dependent IGEs implies that social interactions strongly determine the plastic expression of aggression when competition for resources is relaxed. A more competitive (higher density) rearing environment may fail to provide crickets with sufficient resources to develop social cognition required for strong IGEs. The contribution of IGEs to evolutionary responses was greater at lower densities. Our study thereby demonstrates the importance of considering IGEs in density-dependent ecological and evolutionary processes.
- Published
- 2018
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- View/download PDF
24. Anaphylaxie alimentaire à l'oignon et à l'ail : insuffisance des prick-tests et des IgE spécifiques à la source allergénique. À propos de cinq cas.
- Author
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Beaumont, P., Moneret-Vautrin, D.A., Dzviga, C., and Grand, J.-L.
- Abstract
Résumé: La rareté des allergies aux Liliacées justifie cette relation de cinq cas d’anaphylaxie alimentaire sévère à l’oignon et à l’ail. Trois femmes ont présenté un choc anaphylactique de grade 3, deux ont présenté une diarrhée aiguë. La fréquence, évaluée sur 1300 cas d’anaphylaxie alimentaire enregistrés est de 0,38 %. L’allergie est isolée. Le diagnostic est porté par l’anamnèse relevant la fréquence d’épisodes allergiques et l’interrogatoire permettant d’identifier la responsabilité de l’oignon. Les prick-tests à l’oignon natif et la recherche d’IgE spécifiques sont négatifs quatre fois sur cinq, et trois fois sur quatre. Les auteurs avancent l’hypothèse que l’allergène majeur, l’alliine lyase, est en quantité trop faible dans l’oignon pour que les tests avec la source allergénique puissent être efficients. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
25. Severe drug-induced anaphylaxis: analysis of 333 cases recorded by the Allergy Vigilance Network from 2002 to 2010.
- Author
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Renaudin, J.‐M., Beaudouin, E., Ponvert, C., Demoly, P., and Moneret‐Vautrin, D.‐A.
- Subjects
- *
ANAPHYLAXIS , *DRUG side effects , *MEDICAL research , *ALLERGY diagnosis , *INTENSIVE care units , *SKIN examination - Abstract
Background A few series of well-documented cases of severe drug-induced anaphylaxis ( SDA) are available. Methods Cases collected by the Allergy Vigilance Network from 2002 to 2010 were analyzed for clinical signs, causative drugs, and efficacy of a stepwise approach to diagnosis, using skin tests, laboratory tests, and oral challenges. Results Three hundred and thirty-three cases concerned 300 adults (90.1%) and 33 children (9.9%): 206 females (61.9%) and 127 males (38.1%). Mean age was 42.7 ± 18 years. Anaphylactic shock (76.6%), severe systemic reactions (10.5%), acute laryngeal edema (9%), severe bronchospasm (2.1%), and six fatal cases (1.8%) were recorded. There were 270 cases (81.1%) of ambulatory anaphylaxis. Sixty-three cases (18.9%) occurred during anesthesia. Hospitalization was required in 94.8% of cases. 23.7% of patients were admitted to an intensive care unit. Epinephrine was used in 57.9% of cases. Eighty-four drugs were incriminated: antibiotics (49.6%), muscle relaxants, latex and anesthetics (15%), nonsteroidal anti-inflammatory drugs (10.2%), acetaminophen (3.9%), iodinated or magnetic resonance imaging contrast media (4.2%), immunotherapy and vaccines (3.9%), and other drugs (13%). Among antibiotics, amoxicillin (97 cases), other penicillins (four cases), cephalosporins (41 cases), quinolones (15 cases), and pristinamycin (seven cases) were the most common. The diagnosis of drug hypersensitivity was obtained by skin tests in 72.9%, laboratory tests only in 2.4% of cases, and oral challenges (OCs) only in 3.9% of cases. Conclusions Three hundred and thirty-three case reports provided data on drugs involved in severe anaphylaxis. The efficacy of skin tests and poor use of laboratory tests are underlined. Further progress may depend on OCs. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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- View/download PDF
26. An extended schema and its production rule-based algorithms for assembly data exchange using IGES.
- Author
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Hu, Kai-Mo, Wang, Bin, Liu, Yong, Huang, Jing, and Yong, Jun-Hai
- Subjects
- *
ALGORITHMS , *ROBUST control , *COMPUTER software correctness , *DIRECTED acyclic graphs , *COMPUTER-aided design software , *COMPUTER graphics , *GRAPHICS processing units - Abstract
Assembly data exchange and reuse play an important role in CAD and CAM in shortening the product development cycle. However, current CAD systems cannot transfer mating conditions via neutral file format, and their exported IGES files are heterogeneous. In this paper, a schema for the full data exchange of assemblies is presented based on IGES. We first design algorithms for the pre-and-post processors of parts based on solid model, in which the topologies are explicitly specified and will be referred by mating conditions, and then extend the IGES schema by introducing the Associativity Definition Entity and Associativity Instance Entity defined in IGES standard, so as to represent mating conditions. Finally, a production rule-based method is proposed to analyze and design the data exchange algorithms for assemblies. Within this schema, the heterogeneous representations of assemblies exported from different CAD systems can be processed appropriately, and the mating conditions can be properly exchanged. Experiments on the prototype system verify the robustness, correctness, and flexibility of our schema. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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27. Sustained CAD/CAE integration: integrating with successive versions of step or IGES files
- Author
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Kirkwood, Robert and Sherwood, James A.
- Published
- 2017
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28. The level of knowledge about exploration geophysical methods in Australia prior to the Imperial Geophysical Experimental Survey (IGES), 1928–30. Part 2
- Author
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Roger Henderson
- Subjects
IGES ,computer.file_format ,computer ,Cartography ,Geology - Published
- 2017
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29. The level of knowledge about exploration geophysical methods in Australia prior to the Imperial Geophysical Experimental Survey (IGES), 1928–30. Part 1
- Author
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Roger Henderson
- Subjects
Geography ,Media studies ,Library science ,IGES ,computer.file_format ,computer - Published
- 2017
- Full Text
- View/download PDF
30. A method for verification of computer-aided design model errors.
- Author
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Yang, J., Han, S., and Park, S.
- Subjects
- *
COMPUTER-aided design , *DATA protection , *NEW product development , *MANUFACTURING processes , *COMPUTER-aided engineering , *ELECTRONIC data processing - Abstract
Computer-aided design (CAD) models have errors that originate from data loss during the data conversion process or the technical weakness of the neutral format. Error recovery requires an increase in lead-time and additional expenses for product development. The serious problem is that errors in a CAD model are not found until after downstream development processes. In this paper, we propose a method to identify CAD model errors that are contained in a neutral format. Considering different topological and geometrical characteristics in the exchange of product model data (STEP) and initial graphics exchange specification (IGES) formats, our method includes a verification process to check a CAD model error step by step without wasting resources. To test the idea, we have implemented a verification system that checks topological and geometrical errors of 19 items in the STEP format and 12 items in the IGES format. [ABSTRACT FROM AUTHOR]
- Published
- 2005
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- View/download PDF
31. 3 BOYUTLU PRİZMATİK PARÇA MODELLERİNİN YORUMLANMASINDA IGES DOSYALARININ ÖZEL BİR FORMATA DÖNÜ ŞTÜRÜLMESİ.
- Author
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Kayir, Yunus and Gülesin, Mahmut
- Subjects
C++ ,PROGRAMMING languages ,COMPUTER systems ,INFORMATION technology ,MODELS & modelmaking ,GEOMETRIC modeling ,TOPOLOGICAL fields ,SOFTWARE engineering ,FORMAT of computer output microfilm - Abstract
Copyright of Teknoloji is the property of Engineering Science & Technology, an International Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2005
32. Automatic generation of part programs for milling sculptured surfaces
- Author
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Mansour, S.
- Subjects
- *
COMPUTER-aided design , *COMPUTER integrated manufacturing systems , *NUMERICAL control of machine tools - Abstract
In recent years, a large number of commercially available CAD/CAMCAE packages as well as computer numerically controlled machine tools have been imported into Iranian manufacturing industry. However, there has been no easy-to-use link or interface between the two. In this paper, an attempt is made to establish a simple but effective software to link CAD packages and CNC machine tools. To achieve this, a software package was developed capable of exploring Initial Graphics Exchange Specifications (IGES) files of simple or free-form surfaces created on any CAD package. The data extracted from IGES files is used to graphically simulate tool path due to centre and tip of a ball nose tool and a filleted cutter as well as tip of a flat end mill cutter. Depending on the size of created surfaces, various dimensions of cutting tools should be selected by the user. Other features included in this package are the ability to automatically detect the correct machining direction and correct machining side of surface, calculation of tool compensation and tool step. Obviously, its main feature is its ability to automatically generate part programs for machining sculptured surfaces. Number of such surfaces were created on CAD systems and the generated tool path were successfully simulated and a few are presented in this paper. [Copyright &y& Elsevier]
- Published
- 2002
- Full Text
- View/download PDF
33. The Effect of The CAD Data Exchange on the Motion Analysis in the Solidworks CAD Program
- Author
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Mustafa Er, Yunus Kayir, and Mühendislik Fakültesi
- Subjects
IGES ,Environmental Engineering ,Engineering ,Assembly ,Montaj ,Motion Analysis,IGES,STEP,Assembly ,Hareket Analizi,IGES,STEP,Montaj ,Mühendislik ,Motion Analysis ,STEP ,Industrial and Manufacturing Engineering ,Hareket Analizi - Abstract
Günümüzde, tasarım ve imalat işlerinde bilgisayar destekli sistemler yaygın olarak kullanılmaktadır. Dünyada, bu amaçla geliştirilmiş farklı özelliklere sahip birçok BDT ve BDİ programları bulunmaktadır. BDT ve BDİ programlarının birbirleri arasında veri alışverişinin yapılabilmesinde ise ortak dosya formatları geliştirilmiştir. Fakat yapılan veri alışverişlerinde ise kayıplar meydana gelebilmektedir. Bu çalışmada, bir BDT programında elde edilen bir modelin, herhangi bir analiz için başka bir BDT kullanılması durumunda elde edilecek olan sonuçlar üzerinde etkili olacağı düşünülmüştür. Bu amaçla, yaygın kullanıma sahip bir BDT programında krank-biyel mekanizması tasarlanmıştır. Krank-biyel mekanizmasında kullanılan parçalar katı olarak modellenmiştir. Modellenen parçalar, IGES, STEP ve SLDPRT dosya formatlarında kaydedilmiştir. 3 farklı format için ayrı ayrı montajlar gerçekleştirilmiştir. Elde edilen krank-biyel mekanizmaları üzerinde hareket analizleri yapılmış ve sonuçlar karşılaştırılmıştır. Analiz sonuçları, SLDPRT, STEP ve IGES dosya formatlarında kaydedilen mekanizmalara ait veriler arasında farklılıkların bulunduğunu göstermiştir., Today, computer-aided systems are widely used in design and manufacturing. There are many CAD and CAM programs in the world with different features developed for this purpose. Common file formats are developed in order to make data exchange between CAD and CAM programs. However, losses can occur in data exchange. In this study, it was thought that a 3D model obtained in a CAD program would have an effect on the results obtained if another CAD was used for any analysis. For this purpose, a crank-rod mechanism is designed as a 3D in a common CAD program. The parts used in the crank-rod mechanism are modeled as solid. The parts were save in IGES, STEP and SLDPRT common file formats. Assemblies were realized separately for 3 different CAD formats. The motion analysis was performed on the crank-rod mechanisms and the results were compared. The results of the analysis showed that there were differences between SLDPRT, STEP and IGES data of the crank-rod mechanisms.
- Published
- 2019
34. Strategies to Promote Energy-Efficient Compressed Air Systems Among Indian Companies
- Author
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Girish Sethi, Aditi Khodke, Toshizo Maeda, Mika Tachibana, and Bertoldi, Paolo
- Subjects
Scope (project management) ,business.industry ,Compressed air ,Green Jobs ,Audit ,IGES ,computer.file_format ,Environmental economics ,Installation ,Electricity ,Leakage (economics) ,business ,computer ,Efficient energy use ,Sustainable Consumption and Production - Abstract
Compressed air systems account for 5–35% of electricity use among the Indian manufacturing sector. It shares a significant portion of the production cost, but its energy-efficiency measures are not widely applied in India yet. From 2011 to 2018, the Institute for Global Environmental Strategies (IGES) and The Energy and Resources Institute (TERI) jointly conducted 30 preliminary energy audits at different sectors including textiles, pharmaceuticals, automobiles, auto components, casting, and forging to promote energy efficiency of compressed air systems. Through this, it was found that there is a vast scope for energy savings by adopting better operating and maintenance practices, such as leakage prevention, pressure adjustment, air controls, improving ventilation, and installing appropriate compressors. Based on these findings, most of the audited companies incorporated the recommended operating and maintenance practices, and some installed new compressors. Information on energy efficiency is widely available in India; however, it was observed that companies, particularly small- and medium-scale enterprises (SMEs) had limited knowledge about it. To address this gap, authors carried out preliminary energy audits, organised awareness workshops, and trained energy personnel. This paper analyses the effect of these interventions and recommends actions to adopt a packaged approach to promote energy efficiency of the compressed air system in a more comprehensive manner.
- Published
- 2021
35. Co-benefit analysis of the proposed Panay-Guimaras-Negros Bridge Project, Western Visayas, Philippines
- Author
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Alexis M. Fillone and Nicanor R. Roxas
- Subjects
Engineering ,geography ,Co benefits ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,Cost–benefit analysis ,Continuous flow ,business.industry ,Environmental resource management ,IGES ,computer.file_format ,010501 environmental sciences ,01 natural sciences ,Bridge (interpersonal) ,Civil engineering ,Travel time ,Archipelago ,business ,computer ,Transport system ,0105 earth and related environmental sciences - Abstract
The Western Visayas region is at the heart of the Philippine archipelago. It consists of three main islands, Panay, Guimaras, and Negros. Because of the region's geographic make-up, an efficient inter-island transport system is necessary to ensure the continuous flow of goods, services, and people. In order to aid the region in continuously becoming a significant contributor to the economy, the Panay-Guimaras-Negros (PGN) inter-island bridge project is proposed. The proposed project intends to connect the three main islands via inter-island bridges that span approximately 23 km. The bridge will connect the main urban centers of the region, Iloilo City in Panay Island and Bacolod City in Negros Island. This study looks into the proposed PGN project and current condition of the inter-island travel in the region. Specifically, this study will employ the co-benefit approach as suggested by the Institute for Global Environmental Strategies (IGES) on the proposed PGN project. Results of this study are beneficial for the preliminary evaluation of the project. The various benefits and savings from travel time, vehicle operating cost, and air emissions are quantified and converted to monetary terms through this method. The result of this study can provide input in the initial assessment of the project before the full cost-benefit analysis is employed.
- Published
- 2017
- Full Text
- View/download PDF
36. A survey analysis of low carbon technology diffusion in China's iron & steel industry
- Author
-
Xue Gao and Xianbing Liu
- Subjects
Engineering ,Renewable Energy, Sustainability and the Environment ,business.industry ,Energy management ,Natural resource economics ,020209 energy ,Strategy and Management ,chemistry.chemical_element ,02 engineering and technology ,IGES ,computer.file_format ,Industrial and Manufacturing Engineering ,Waste heat recovery unit ,Electricity generation ,chemistry ,Carbon price ,Greenhouse gas ,0202 electrical engineering, electronic engineering, information engineering ,business ,computer ,Carbon ,Global environmental analysis ,General Environmental Science - Abstract
This study estimates how carbon price affects diffusion of low carbon technologies using data collected from 60 iron & steel companies in China. The analysis indicates that the industry is familiar with related key energy saving and low carbon technologies and has made much progress in energy saving, but efforts in carbon management need improving. An average payback time threshold of 4.1 years was found as regards decision in invest in technology. The three target technologies were adopted by companies to different extents. Carbon emissions pricing was found to be ineffective in promoting the scale-up or further adoption of economically advantageous technologies such as dry top pressure recovery turbine (Dry TRT) and energy management centre (EMC) technology. A moderate carbon price for sintering waste heat recovery power generation (Sintering WHR), which has adoption potential in China's iron & steel industry, may generate comparatively significant effects for diffusion. This research sheds light on how diffusion of low carbon technologies would be affected and the consequences thereof on climate policy development for the target sector in China.
- Published
- 2016
- Full Text
- View/download PDF
37. CHARACTERISTICS OF THE REMOTE SENSING DATA USED IN THE PROPOSED UNFCCC REDD+ FOREST REFERENCE EMISSION LEVELS (FRELS)
- Author
-
B. A. Johnson, H. Scheyvens, H. Samejima, and M. Onoda
- Subjects
lcsh:Applied optics. Photonics ,Earth observation ,010504 meteorology & atmospheric sciences ,Land use ,lcsh:T ,0211 other engineering and technologies ,lcsh:TA1501-1820 ,Climate change ,02 engineering and technology ,IGES ,computer.file_format ,lcsh:Technology ,01 natural sciences ,Geography ,lcsh:TA1-2040 ,Sustainable management ,Deforestation ,Land use, land-use change and forestry ,lcsh:Engineering (General). Civil engineering (General) ,computer ,Global environmental analysis ,021101 geological & geomatics engineering ,0105 earth and related environmental sciences ,Remote sensing - Abstract
Developing countries must submit forest reference emission levels (FRELs) to the UNFCCC to receive incentives for REDD+ activities (e.g. reducing emissions from deforestation/forest degradation, sustainable management of forests, forest carbon stock conservation/enhancement). These FRELs are generated based on historical CO2 emissions in the land use, land use change, and forestry sector, and are derived using remote sensing (RS) data and in-situ forest carbon measurements. Since the quality of the historical emissions estimates is affected by the quality and quantity of the RS data used, in this study we calculated five metrics (i-v below) to assess the quality and quantity of the data that has been used thus far. Countries could focus on improving on one or more of these metrics for the submission of future FRELs. Some of our main findings were: (i) the median percentage of each country mapped was 100%, (ii) the median historical timeframe for which RS data was used was 11.5 years, (iii) the median interval of forest map updates was 4.5 years, (iv) the median spatial resolution of the RS data was 30m, and (v) the median number of REDD+ activities that RS data was used for operational monitoring of was 1 (typically deforestation). Many new sources of RS data have become available in recent years, so complementary or alternative RS data sets for generating future FRELs can potentially be identified based on our findings; e.g. alternative RS data sets could be considered if they have similar or higher quality/quantity than the currently-used data sets.
- Published
- 2016
- Full Text
- View/download PDF
38. Assessment of environmental and economic performance of Waste-to-Energy facilities in Thai cities
- Author
-
Janya Sang-Arun, Nirmala Menikpura, and Magnus Bengtsson
- Subjects
Engineering ,Resource (biology) ,Waste management ,Renewable Energy, Sustainability and the Environment ,business.industry ,020209 energy ,02 engineering and technology ,IGES ,computer.file_format ,Environmental economics ,Incineration ,Waste-to-energy ,Landfill gas ,Greenhouse gas ,0202 electrical engineering, electronic engineering, information engineering ,Production (economics) ,business ,computer ,Global environmental analysis - Abstract
Waste-to-Energy (WtE) technologies seem to be an option to tackle the growing waste management problems in developing Asia. This paper presents a quantitative assessment of the environmental and economic attributes of two major WtE technologies: landfill gas to energy (LFG-to-energy) and incineration in Thai cities. Net greenhouse gas (GHG) emissions, net fossil resource consumption and net life-cycle cost (LCC) were used as the basic indicators for measuring performance of these two technologies from a life cycle perspective. The assessment found that at the current efficiency level, both the LFG-to-energy project and the incineration facility contribute to GHG mitigation and fossil resource savings as compared to the Business as Usual (BAU) practice. However, the financial returns from these operations are very low and insufficient to compensate the costs. The paper argues that substantial improvements of WtE plants can be made by adopting proper management practices, enhancing the efficiencies of energy production. Such upgrading would further reduce GHG emissions, increase fossil resource savings and strengthen the financial performance to the benefit of local governments. The authors recognize the potential of incorporating other treatment options along with WtE technologies, for moving towards more sustainable waste management approaches like integrated waste management systems.
- Published
- 2016
- Full Text
- View/download PDF
39. Evidence on intergenerational income transmission using complete Dutch population data
- Author
-
Marco G. Ercolani, Ceren Ozgen, Fiona Carmichael, Christian K. Darko, and W. Stanley Siebert
- Subjects
Economics and Econometrics ,05 social sciences ,IGES ,computer.file_format ,Individual income ,Social mobility ,0502 economics and business ,Dutch Population ,Population data ,Economics ,Demographic economics ,050207 economics ,Elasticity (economics) ,computer ,Lower income ,Finance ,050205 econometrics - Abstract
We estimate the intergenerational elasticity (IGE) of income for the Netherlands using complete population data for around 177,000 28-year olds. We find that IGEs are much lower when actual individual income data are used rather than proxies or aggregates for income. Though low, daughters’ IGEs are higher than sons’ indicating lower income mobility for women.
- Published
- 2020
- Full Text
- View/download PDF
40. CADEXCAP: Integration of 2D CAD models of turned components with CAPP.
- Author
-
Kalta, M. and Davies, B.
- Abstract
EXCAP is a knowledge-based process-planning system for turned components. This paper describes a software package called CADEXCAP, which has been developed to integrate EXCAP and CAD systems via IGES. CADEXCAP deciphers a full 2 D model of a turned component developed on a CAD system and then, via IGES, fully automatically generates a product model in the EXCAP model format. It is clever enough to extract not only the geometrical information but also the other required information, such as geometrical and dimensional tolerances, surface finish and manufacturing instructions. [ABSTRACT FROM AUTHOR]
- Published
- 1993
- Full Text
- View/download PDF
41. Converting 80-character ASCII IGES sequential files into more conveniently accessible direct-access files.
- Author
-
Kalta, M. and Davies, B.
- Abstract
One of the main drawbacks of the Initial Graphics Exchange Specification (IGES) is the difficulty of accessing and retrieving the required information stored in the IGES files. This is because IGES files created by CAD systems are sequential. This paper describes a module, called 'readiges', which is a general-purpose software package for re-storing IGES files in more conveniently accessible direct-access files. Hence, 'readiges' can be used in any research projects that use IGES to integrate CAD systems with other software packages, for example with finite-element packages for mesh-generation purposes or computer-aided process-planning systems. [ABSTRACT FROM AUTHOR]
- Published
- 1993
- Full Text
- View/download PDF
42. An IGES post-processor for interfacing CAD and CAPP of 2 1/2D prismatic parts.
- Author
-
Vosniakos, G. and Davies, B.
- Abstract
An IGES post-processor is presented, written in FORTRAN-77, to extract from an IGES file all information that an automatic process planning program needs, derive new information when necessary and formalise it as PROLOG facts. The processor deals with wire frame models and drawings. Its various modules are described and considerations about its design are discussed, associated with the IGES specification philosophy and pre-processor implementations. Analogous approaches from other processor designs are reviewed. [ABSTRACT FROM AUTHOR]
- Published
- 1990
- Full Text
- View/download PDF
43. Conversion of wireframe to ACIS solid models for 2 1/2-D engineering components.
- Author
-
Vosniakos, G.
- Abstract
Wireframe models need to be converted to solid models as the latter tend to become more widespread, consistent and affordable. A conversion algorithm for manifold objects was defined to obtain ACIS, the de facto standard B-rep model from a neutral IGES wireframe model and was implemented in C++ in successive stages as follows. All potential surfaces are found first. The entities lying on the same surface are examined in order to form closed profile-loops. Loop nesting is examined according to a ray casting algorithm. Adjacency and nesting of loops is used in order to assign traversal directions to all edges according to the Möbius rule. Invalid profiles (those containing edges belonging to more than two loops) are searched for and successively removed. The final test is that of edge type. If the majority of edges turn out to be concave, the traversal sign of all edges is reversed, so that the body is solid in empty space and not the other way around. For engineering components the algorithm adequately resolves all singular cases. [ABSTRACT FROM AUTHOR]
- Published
- 1998
- Full Text
- View/download PDF
44. CAD model robustness assessment and repair
- Author
-
Armand D. Assadi
- Subjects
business.industry ,Vendor ,Computer science ,CAD ,IGES ,computer.file_format ,computer.software_genre ,File format ,Trim ,Reliability engineering ,Robustness (computer science) ,New product development ,Data mining ,business ,Transfer problem ,computer - Abstract
The transfer of CAD data among different CAD systems or subsequent downstream analysis applications is critically important to the acceleration of the product development cycle. Since each vendor has its own proprietary native file format, this transfer of data among differing systems is difficult at best. A proposed solution to the transfer problem was the development of agreed upon standard neutral file formats, such as IGES or STEP. However, each vendor writes its own "flavor" of IGES and STEP files that other applications may not understand. The research presented in this dissertation bridges a gap between these systems by taking a native IGES or STEP file and either repairing the data or adding missing information so that a downstream application can properly interpret the model. This ensures that the receiving system gets a full and accurate NURB S-based representation: the original surfaces, the corresponding full complement of model space trim curves, and the corresponding full complement of parameter space trim curves. With all the information present, the receiving system can select the needed pieces to reconstruct the model.
- Published
- 2018
- Full Text
- View/download PDF
45. Sustained Integration for Computer-Aided Manufacturing: Integrating With Successive Versions of Step or IGES Files
- Author
-
Robert Kirkwood and James A. Sherwood
- Subjects
0209 industrial biotechnology ,Process (engineering) ,business.industry ,Computer science ,Computer programming ,020207 software engineering ,CAD ,02 engineering and technology ,IGES ,computer.file_format ,computer.software_genre ,Computer Graphics and Computer-Aided Design ,Industrial and Manufacturing Engineering ,Computer Science Applications ,020901 industrial engineering & automation ,Computer-aided manufacturing ,New product development ,0202 electrical engineering, electronic engineering, information engineering ,Computer Aided Design ,business ,Computer-aided engineering ,Software engineering ,computer ,Software - Abstract
Computer-aided design (CAD)/computer-aided manufacturing (CAM)/computer-aided engineering (CAE) integration offers designers, analysts, and manufacturers the opportunity to share data efficiently throughout the product development process. CAM for NC programing and tool design integrated with solid model data from CAD systems represents a large portion of the CAD/CAM/CAE domain. Sustained integration whereby successive changes to a CAD model are reintegrated with downstream applications is considered the most advanced and useful integration. Sustained integration is typically maintained when working in a homogeneous CAD/CAM environment. However, when working with applications that do not share a common environment (i.e., heterogeneous integration), sustained integration fails, and this lack of sustained integration can result in a loss of detailed information as a design progresses through the engineering design process. In the current paper, the authors discuss and demonstrate a novel approach to achieve sustained integration when working in heterogeneous CAD/CAM environments. After providing basic background information to establish a context, then discussing state-of-the-art and emerging solutions, the paper discusses virtual persistent identifiers as described via design change vectors (VPI/DCV). A series of three case studies shows sustained integration based on neutral formats like STEP working as well as that observed in homogeneous environments. This novel approach demonstrates success as a generic solution using common export formats from the current CAD systems and avoids the need to establish any new standards to achieve sustained integration. The paper finishes with a summary of observations learned from these case studies along with possible future research topics.
- Published
- 2018
- Full Text
- View/download PDF
46. Automation of the Selection of the Integrated Structures, Strategies
- Author
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Pokorný Peter and Andrey Kuznetsov
- Subjects
Computer science ,0211 other engineering and technologies ,020101 civil engineering ,CAD ,02 engineering and technology ,IGES ,Solid modeling ,Field (computer science) ,0201 civil engineering ,021105 building & construction ,Production engineering ,integrative ,Engineering(all) ,Product design ,biology ,business.industry ,General Medicine ,computer.file_format ,biology.organism_classification ,Acis ,Automation ,cross-domain transition ,automated system ,Systems engineering ,CAD system ,Software engineering ,business ,computer ,the loss of information - Abstract
The article deals with the problems of integration of modern CAD systems in production engineering systems. The solution offers automated system of choosing the optimal structure strategy, which has the lowest rate of loss of information during its migration between different CAD systems. The problem of the integration of modern CAD systems, which exists due to the presence of large amounts of diverse data formats, such as: STEP, Parasolid, ACIS, IGES, STL, etc. In order to with great confidence to predict the possible loss of information when converting and then. exchange of data between the formats you need the opinion of an expert in this field. This technology makes product design more efficient by automating processes that were once manual, such as traditional drafting. With 3D CAD, designers can also do solid modeling, creating three-dimensional representations of their products.
- Published
- 2016
- Full Text
- View/download PDF
47. Japan's policy to reduce emissions of volatile organic compounds: factors that facilitate industry participation in voluntary actions
- Author
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Mark Elder, Naoko Matsumoto, and Akira Ogihara
- Subjects
Economic growth ,Public economics ,Regulatory capture ,Renewable Energy, Sustainability and the Environment ,Strategy and Management ,Policy mix ,Context (language use) ,IGES ,computer.file_format ,Private sector ,Industrial and Manufacturing Engineering ,Incentive ,Credibility ,Economics ,computer ,Global environmental analysis ,General Environmental Science - Abstract
Existing research on business participation in voluntary environmental programs emphasizes a variety of explanations, including regulatory pressure and incentives, market pressure, self-regulation, and firm size. However, most of this literature focuses on cases from North America and Europe. The contribution of this research is to examine how well this literature applies to a different geographical region and policy context by examining the case of Japan's recent policy mix to reduce emissions of volatile organic compounds following revisions to Japan's Air Pollution Control Law. The scientific and policy significance of this case includes a high level of private sector voluntary participation and a sizable reduction in volatile organic compound emissions (44.1 percent). Moreover, the case is related to the major global air pollution priorities of particulate matter and ozone, since volatile organic compounds are important precursors of these two secondary pollutants. This was also the first case in Japan's environmental policy to use a combination of regulatory and voluntary approaches. This study draws upon records of official policy discussions, data related to relevant industry associations, and other primary source documents to test hypotheses on participation in voluntary programs for two relatively large emitting industries with high emission capture rates in Japan: the chemical and printing industries. The results indicate that explanations for the participation of Japanese firms are largely consistent with arguments based on North American and European cases regarding regulatory pressure and incentives, market pressure, and self-regulation, but only partially consistent regarding the role of firm size. The analysis shows that there were similarities and differences in the factors influencing the participation of the two industries which were partly related to industrial associations and industrial structure. In addition, the results highlight the importance of two points which are less emphasized by existing literature, the business-government bargaining process, and how to maintain the credibility of regulatory threats and avoid regulatory capture. Several policy implications for the design of voluntary approaches are presented.
- Published
- 2015
- Full Text
- View/download PDF
48. Developing 3R policy indicators for Asia and the Pacific region: experience from Regional 3R Forum in Asia and the Pacific
- Author
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Michikazu Kojima, Chettiyapan Visvanathan, Yasuhiko Hotta, and Agamuthu Pariatamby
- Subjects
Core set ,Economic growth ,020209 energy ,Resource efficiency ,02 engineering and technology ,IGES ,computer.file_format ,010501 environmental sciences ,Reuse ,01 natural sciences ,Green economy ,Mechanics of Materials ,0202 electrical engineering, electronic engineering, information engineering ,Asian country ,Business ,Performance indicator ,Waste Management and Disposal ,computer ,Global environmental analysis ,0105 earth and related environmental sciences - Abstract
In developing Asia, policies and legislations to promote reduce, reuse and recycling (3Rs) of waste have gained much traction over the last 10 years. Henceforth, the focus of governmental efforts on the 3Rs will be on improving the policy implementation and managing the policy progress. To meet these ends, it is essential to set clear policy targets and review them regularly with a set of policy and performance indicators. Experiences from various Asian countries show different types and approaches taken toward developing these 3R indicators. To bring the 3R performance indicators to a standardized and comparable level among the member countries, the 5th Regional 3R Forum in Asia and the Pacific has proposed nine indicators. These indicators are recommended to consider the linkages with resource efficiency and the green economy, rather than just end-of-life product recycling. This paper describes the Asian experience and efforts to set core set of 3R policy indicators to monitor progress of 3R implementation at regional level.
- Published
- 2015
- Full Text
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49. Comparative assessment of Japan's long-term carbon budget under different effort-sharing principles
- Author
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Takeshi Kuramochi, Hanna Fekete, Kentaro Tamura, Niklas Höhne, and Jusen Asuka
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Atmospheric Science ,Economic growth ,020209 energy ,02 engineering and technology ,IGES ,Environmental Science (miscellaneous) ,Management, Monitoring, Policy and Law ,carbon budget ,equity ,Japan ,0202 electrical engineering, electronic engineering, information engineering ,Economics ,Global environmental analysis ,Global and Planetary Change ,Equity (finance) ,computer.file_format ,mitigation scenarios ,Environmental economics ,mitigation policy ,Term (time) ,Environmental Systems Analysis ,effort sharing ,Milieusysteemanalyse ,Greenhouse gas ,computer - Abstract
This article assesses Japan's carbon budgets up to 2100 in the global efforts to achieve the 2 °C target under different effort-sharing approaches based on long-term GHG mitigation scenarios published in 13 studies. The article also presents exemplary emission trajectories for Japan to stay within the calculated budget. The literature data allow for an in-depth analysis of four effort-sharing categories. For a 450 ppm CO2e stabilization level, the remaining carbon budgets for 2014–2100 were negative for the effort-sharing category that emphasizes historical responsibility and capability. For the other three, including the reference ‘Cost-effectiveness’ category, which showed the highest budget range among all categories, the calculated remaining budgets (20th and 80th percentile ranges) would run out in 21–29 years if the current emission levels were to continue. A 550 ppm CO2e stabilization level increases the budgets by 6–17 years-equivalent of the current emissions, depending on the effort-sharing category. Exemplary emissions trajectories staying within the calculated budgets were also analysed for ‘Equality’, ‘Staged’ and ‘Cost-effectiveness’ categories. For a 450 ppm CO2e stabilization level, Japan's GHG emissions would need to phase out sometime between 2045 and 2080, and the emission reductions in 2030 would be at least 16–29% below 1990 levels even for the most lenient ‘Cost-effectiveness’ category, and 29–36% for the ‘Equality’ category. The start year for accelerated emissions reductions and the emissions convergence level in the long term have major impact on the emissions reduction rates that need to be achieved, particularly in the case of smaller budgets. Policy relevance In previous climate mitigation target formulation processes for 2020 and 2030 in Japan, neither equity principles nor long-term management of cumulative GHG emissions was at the centre of discussion. This article quantitatively assesses how much more GHGs Japan can emit by 2100 to achieve the 2 °C target in light of different effort-sharing approaches, and how Japan's GHG emissions can be managed up to 2100. The long-term implications of recent energy policy developments following the Fukushima nuclear disaster for the calculated carbon budgets are also discussed.
- Published
- 2015
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50. Research on Deleting the Overlapped Geometric Entities of a Tire for Enhancing Analysis Performance
- Author
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Kang-Soo Lee
- Subjects
Engineering drawing ,Engineering ,business.industry ,IGES ,computer.file_format ,Tread ,business ,computer ,Automotive engineering - Published
- 2015
- Full Text
- View/download PDF
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