Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312296
Dong-Ho Kim, Won-Joon Shin, Jin-Ho Park, Myung-Joon Lee
WebDAV is an IETF standard protocol which supports asynchronous collaborative authoring on the Web. The recently published WebDAV access control protocol provides various methods of controlling the resources on a WebDAV server and their properties, helping high-level collaborative works to be performed through the WebDAV server. Based on the WebDAV access control protocol, we developed a collaborative system named CoSlide which supports exchanging and/or sharing data among the members using the system. CoSlide provides Group workspaces - the shared spaces for the members in those groups as well as personal workspaces which are the private spaces on the Web for each user. In addition, it also provides open workspaces which support additional information exchanging methods for unsubscribed users. The CoSlide client has been developed as a windows application using .Net framework. The client also provides the ability to launch an authoring application from its WebDAV view, automatically locking, and downloading the content to be edited. We constructed the server for CoSlide using Jakarta Slide - a WebDAV server supporting the WebDAV access control protocol.
{"title":"Supporting Effective Collaborative Works Based on WebDAV","authors":"Dong-Ho Kim, Won-Joon Shin, Jin-Ho Park, Myung-Joon Lee","doi":"10.1109/IFOST.2006.312296","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312296","url":null,"abstract":"WebDAV is an IETF standard protocol which supports asynchronous collaborative authoring on the Web. The recently published WebDAV access control protocol provides various methods of controlling the resources on a WebDAV server and their properties, helping high-level collaborative works to be performed through the WebDAV server. Based on the WebDAV access control protocol, we developed a collaborative system named CoSlide which supports exchanging and/or sharing data among the members using the system. CoSlide provides Group workspaces - the shared spaces for the members in those groups as well as personal workspaces which are the private spaces on the Web for each user. In addition, it also provides open workspaces which support additional information exchanging methods for unsubscribed users. The CoSlide client has been developed as a windows application using .Net framework. The client also provides the ability to launch an authoring application from its WebDAV view, automatically locking, and downloading the content to be edited. We constructed the server for CoSlide using Jakarta Slide - a WebDAV server supporting the WebDAV access control protocol.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123988254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312309
V. Vasyukov
Gibbs (Markov) random fields are used as stochastic picture models in image processing because of their conceptual simplicity and due to the fact that Gibbs models are fit to synthesize algorithms based on Bayes approach. In this paper, we are concerned with Gibbs fields taking on values from finite sets. This restriction allows to overcome difficulties in estimating Gibbs distribution parameters and to synthesize some useful algorithms of image processing.
{"title":"Image Processing Algorithms Based on Finite-State Gibbs Models","authors":"V. Vasyukov","doi":"10.1109/IFOST.2006.312309","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312309","url":null,"abstract":"Gibbs (Markov) random fields are used as stochastic picture models in image processing because of their conceptual simplicity and due to the fact that Gibbs models are fit to synthesize algorithms based on Bayes approach. In this paper, we are concerned with Gibbs fields taking on values from finite sets. This restriction allows to overcome difficulties in estimating Gibbs distribution parameters and to synthesize some useful algorithms of image processing.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121524594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312315
Hong‐Hee Lee, H.M. Nguyen
This paper describes the proposed direct rotor-flux-oriented control (R-FOC) method using matrix converter fed induction motor. This method utilizes the advantages of R-FOC method and the advantages of matrix converter. This includes the energy saving, hardware compact designs of MC beside the fast response and easy implementation of R-FOC method. A simulation of the overall system has been carried out to validate the advantages of the proposed method.
{"title":"Direct Rotor-Flux-Oriented Control Method Using Matrix Converter Fed Induction Motor","authors":"Hong‐Hee Lee, H.M. Nguyen","doi":"10.1109/IFOST.2006.312315","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312315","url":null,"abstract":"This paper describes the proposed direct rotor-flux-oriented control (R-FOC) method using matrix converter fed induction motor. This method utilizes the advantages of R-FOC method and the advantages of matrix converter. This includes the energy saving, hardware compact designs of MC beside the fast response and easy implementation of R-FOC method. A simulation of the overall system has been carried out to validate the advantages of the proposed method.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122722643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312263
Kyung-Sick Lee, Sung-Jin Park, Young-sam Kim, Joon-sik Kim
The effects of strain rates and temperatures on the tensile properties of plastics were studied. Three types of plastics, which are used in the automotive instrument panel, were tested at various strain rates, and the stress-strain relations were obtained. And also tensile tests for the same plastics were performed at high and low temperatures, and the variations of the tensile properties with temperatures were acquired. The effects of the strain rates and temperatures on the tensile properties are discussed.
{"title":"Tensile Properties of Plastics used in Automotive Instrument Panel over some Ranges of Strain Rates and Temperatures","authors":"Kyung-Sick Lee, Sung-Jin Park, Young-sam Kim, Joon-sik Kim","doi":"10.1109/IFOST.2006.312263","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312263","url":null,"abstract":"The effects of strain rates and temperatures on the tensile properties of plastics were studied. Three types of plastics, which are used in the automotive instrument panel, were tested at various strain rates, and the stress-strain relations were obtained. And also tensile tests for the same plastics were performed at high and low temperatures, and the variations of the tensile properties with temperatures were acquired. The effects of the strain rates and temperatures on the tensile properties are discussed.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129713950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312275
Guan-Chuh Luh, Wei‐Wen Liu
This paper proposes a potential filed immune network for dynamic navigation of mobile robots in an unknown environment with moving obstacles and targets. The velocity obstacle method is utilized to determine imminent obstacle collision of a robot moving in the time-varying environment. The response of the overall immune network is derived by the aid of fuzzy system. Simulation results are presented to verify the effectiveness of the proposed methodology in unknown environments with single and multiple moving obstacles.
{"title":"Potential Field Based Immune Network for Dynamic Motion Planning of Mobile Robots","authors":"Guan-Chuh Luh, Wei‐Wen Liu","doi":"10.1109/IFOST.2006.312275","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312275","url":null,"abstract":"This paper proposes a potential filed immune network for dynamic navigation of mobile robots in an unknown environment with moving obstacles and targets. The velocity obstacle method is utilized to determine imminent obstacle collision of a robot moving in the time-varying environment. The response of the overall immune network is derived by the aid of fuzzy system. Simulation results are presented to verify the effectiveness of the proposed methodology in unknown environments with single and multiple moving obstacles.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128746560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312351
E. Kim, K. Lim, K. Lee
A functional automotive part, reaction shaft support, was fabricated by partial squeeze and vacuum die casting (PSVD) with light-weight Al-15% Si hypereutectic alloy which has good fluidity and excellent wear resistance. The effects of partial squeezing pressure and time-lag of PSVD process on the microstructure of the product were investigated. Measurement of specific gravity with the change of partial squeeze pressure and time-lag showed that the partial squeezing effect can be increased by increasing squeeze pressure and decreasing time-lag. However, too high a squeeze pressure and too a low time-lag brought about insufficient squeezing effect due to instant movement to the squeeze plunger stroke end point. Through the combination of vacuum suction before melt injection and partial squeezing after melt injection in PSVD process, light-weight Al-15% Si alloy reaction shaft support was successfully developed, resulting in excellent microstructural and mechanical properties.
{"title":"Characterization of Partial Squeeze and Vacuum Die Casting Process in Fabricating Automobile Parts","authors":"E. Kim, K. Lim, K. Lee","doi":"10.1109/IFOST.2006.312351","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312351","url":null,"abstract":"A functional automotive part, reaction shaft support, was fabricated by partial squeeze and vacuum die casting (PSVD) with light-weight Al-15% Si hypereutectic alloy which has good fluidity and excellent wear resistance. The effects of partial squeezing pressure and time-lag of PSVD process on the microstructure of the product were investigated. Measurement of specific gravity with the change of partial squeeze pressure and time-lag showed that the partial squeezing effect can be increased by increasing squeeze pressure and decreasing time-lag. However, too high a squeeze pressure and too a low time-lag brought about insufficient squeezing effect due to instant movement to the squeeze plunger stroke end point. Through the combination of vacuum suction before melt injection and partial squeezing after melt injection in PSVD process, light-weight Al-15% Si alloy reaction shaft support was successfully developed, resulting in excellent microstructural and mechanical properties.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130288910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312307
Kan-San Kim, G. Chung
This paper presents the growth conditions and characteristics of polycrystalline 3C-SiC thin-films for microsensors related to vehicle engine fields. The growth of the poly 3C-SiC thin-films on the oxided Si (100) wafers was been carried out by APCVD using HMDS precursor. To obtain an optimized growth condition, we have performed depositions under various conditions that temperature was adjusted from 1000 degC to 1200 degC, HMDS flow rates was changed from 5 to 9 sccm, and carrier gas (Ar) was kept up 500 seem. Each samples were analyzed by XRD (X-ray diffraction), XPS (X-ray photoelectron spectroscopy), and FT-IR (Fourier transform-infrared spectroscopy) to find the optimized growth condition. Also, layer density, voids, and dislocations of the cross-section were measured by SEM (scanning electron microscope). From the results of experiment, we have obtained that temperature and HMDS flow rates of the optimized poly 3C-SiC thin-film growth condition were 1000 degC and 8 sccm, respectively.
{"title":"Crystal Growth of 3C-SiC Thin-Films on Si Wafers for Microsensors of Vehicle Engines","authors":"Kan-San Kim, G. Chung","doi":"10.1109/IFOST.2006.312307","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312307","url":null,"abstract":"This paper presents the growth conditions and characteristics of polycrystalline 3C-SiC thin-films for microsensors related to vehicle engine fields. The growth of the poly 3C-SiC thin-films on the oxided Si (100) wafers was been carried out by APCVD using HMDS precursor. To obtain an optimized growth condition, we have performed depositions under various conditions that temperature was adjusted from 1000 degC to 1200 degC, HMDS flow rates was changed from 5 to 9 sccm, and carrier gas (Ar) was kept up 500 seem. Each samples were analyzed by XRD (X-ray diffraction), XPS (X-ray photoelectron spectroscopy), and FT-IR (Fourier transform-infrared spectroscopy) to find the optimized growth condition. Also, layer density, voids, and dislocations of the cross-section were measured by SEM (scanning electron microscope). From the results of experiment, we have obtained that temperature and HMDS flow rates of the optimized poly 3C-SiC thin-film growth condition were 1000 degC and 8 sccm, respectively.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126462547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312327
Hong-Seok Park, V. Le, Gyu-Bong Lee
The main purpose of this paper was to integrate CAD-CAPP-CAD system with optimizing cutting parameters for machining mold die. Due to the complexity of the machining process injection mold, its optimization as well as its optimal control is difficult to perform. Optimization of the cutting process needs efficient means for determining the optimal cutting parameters in order to minimize machining time and simultaneously preserve the quality of machining surface. With the recent development in CAD/CAM software, manufacturing engineers can proceed with the process planning problems, without knowing functional relationship between process input and process output in advance. In this study, the machining simulation in CATIA is used to obtain the results as initial inputs of optimal analysis. The response surface methodology (RSM) is used to analyze the cutting parameters such as cutting speed, feedrate, radial and axial depth of cut, and machining tolerance. Then this process will be integrated into process chain system that we have developed in the previous research.
{"title":"An Integrated CAD-CAPP-CAM System for Machining Mold Die With Optimal Cutting Parameters","authors":"Hong-Seok Park, V. Le, Gyu-Bong Lee","doi":"10.1109/IFOST.2006.312327","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312327","url":null,"abstract":"The main purpose of this paper was to integrate CAD-CAPP-CAD system with optimizing cutting parameters for machining mold die. Due to the complexity of the machining process injection mold, its optimization as well as its optimal control is difficult to perform. Optimization of the cutting process needs efficient means for determining the optimal cutting parameters in order to minimize machining time and simultaneously preserve the quality of machining surface. With the recent development in CAD/CAM software, manufacturing engineers can proceed with the process planning problems, without knowing functional relationship between process input and process output in advance. In this study, the machining simulation in CATIA is used to obtain the results as initial inputs of optimal analysis. The response surface methodology (RSM) is used to analyze the cutting parameters such as cutting speed, feedrate, radial and axial depth of cut, and machining tolerance. Then this process will be integrated into process chain system that we have developed in the previous research.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"42 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127337919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312303
Gyung-Man Kim, Jung-Reol Ahn, T. Chun, Sang-Bock Cho
A common rail and injector is controlled by engine ECU (electrical control unit) with many input sensors in HSDI (high speed direct injection) diesel engine. The engine ECU plays the most important role in controlling the diesel engine. It is important to analyze the operations of engine ECU with a variation of data of input sensors. A simulator is necessary in order to observe easily both the operating conditions and fault situations of engine ECU. In this paper, the characteristics of input sensors and their interface circuits in the engine ECU are analyzed, and the system for generating waveforms of all input sensors is implemented by both the 16-bit DSP TMS320LF2407 and host computer. The simulator of engine ECU is applied to a real vehicle in order to investigate the operations of ECU with a variation of input sensors data.
{"title":"Method for Implementing Characteristics of Input Sensors in the Simulator of Common Rail Engine ECU","authors":"Gyung-Man Kim, Jung-Reol Ahn, T. Chun, Sang-Bock Cho","doi":"10.1109/IFOST.2006.312303","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312303","url":null,"abstract":"A common rail and injector is controlled by engine ECU (electrical control unit) with many input sensors in HSDI (high speed direct injection) diesel engine. The engine ECU plays the most important role in controlling the diesel engine. It is important to analyze the operations of engine ECU with a variation of data of input sensors. A simulator is necessary in order to observe easily both the operating conditions and fault situations of engine ECU. In this paper, the characteristics of input sensors and their interface circuits in the engine ECU are analyzed, and the system for generating waveforms of all input sensors is implemented by both the 16-bit DSP TMS320LF2407 and host computer. The simulator of engine ECU is applied to a real vehicle in order to investigate the operations of ECU with a variation of input sensors data.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131190699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312258
Zhou Meilan, W. Xudong, Zhou Yong-qin
In order to implement the demand of minimum fuel consumption and good power performance for continuously variable transmission (CVT) car, aiming at the whole vehicle model including the engine, the clutch, the CVT and load, the dynamics model of CVT system is established according to different stage of clutch engaging, based on that the dynamic integrated simulation model is developed. Aiming at the running situation of car being complex and variable frequently and the input and output of transmission system being strong coupling, a PD speed ratio controller of self-adjusting parameter and a clutch torque fuzzy controller are devised respectively. Finally three typical running situations are simulated and analyzed, including starting-accelerating, starting-decelerating and encountering resistance disturbance. The steady car speeds of three simulation situations are 109.40 Km/h, 39.93 Km/h and 74.48 Km/h respectively, on the other hand, the theoretical values of that are 109.97 Km/h,39.90 Km/h and 74.49 Km/h respectively. The dynamical curves of simulation demonstrates that the simulation model established is correct, the controllers devised have good control effect and implement reasonable match between engine and CVT.
{"title":"Modeling and Simulation of Continuously Variable Transmission for Passenger Car","authors":"Zhou Meilan, W. Xudong, Zhou Yong-qin","doi":"10.1109/IFOST.2006.312258","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312258","url":null,"abstract":"In order to implement the demand of minimum fuel consumption and good power performance for continuously variable transmission (CVT) car, aiming at the whole vehicle model including the engine, the clutch, the CVT and load, the dynamics model of CVT system is established according to different stage of clutch engaging, based on that the dynamic integrated simulation model is developed. Aiming at the running situation of car being complex and variable frequently and the input and output of transmission system being strong coupling, a PD speed ratio controller of self-adjusting parameter and a clutch torque fuzzy controller are devised respectively. Finally three typical running situations are simulated and analyzed, including starting-accelerating, starting-decelerating and encountering resistance disturbance. The steady car speeds of three simulation situations are 109.40 Km/h, 39.93 Km/h and 74.48 Km/h respectively, on the other hand, the theoretical values of that are 109.97 Km/h,39.90 Km/h and 74.49 Km/h respectively. The dynamical curves of simulation demonstrates that the simulation model established is correct, the controllers devised have good control effect and implement reasonable match between engine and CVT.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115692708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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