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Recently, according to the development of mechatronics industry that was composed of NT, ST, IT, RT and etc, the necessity of nano-parts was increased. Because of the necessity, this research was started for improving work precision of the parts as fixing UPCU (Ultra Precision Cutting Unit) on lathe. So, in this research, we executed the modeling of UPCU (Ultra Precision Cutting Unit) by the application of PZT, the relationship between the displacement of tool in UPCU and the cutting force of it has been in take a triangular position in the case of plane cutting. The modeling of system, that is containing the fine displacement, was performed. Also, we would like to find the optimal cutting condition through the simulation of relationship between the displacement and the cutting force.
Performance test of servo control system that is used ultra-precision positioning system with single plane X-Y stage is performed by simulation with Matlab. Analyzed for previous control algorithm and adapted for modem control theory, dual servo algorithm is developed by minimum order observer, and stability and priority on controller are secured. Through the simulation and experiments on ultra precision positioning, stability and priority on ultra-precision positioning system with single plane X-Y stage and control algorithm are secured by using Matlab with Simulink and ControlDesk made in dSPACE
Extrusion Screw, point parts of extrusion molding extruder, is expanded widely use area with construction machinery, site conveyance device food processor, medicine as well as Polymer extrusion forming. Because this can expect large quantity demand about Screw of special quality of extrusion Screw item, is become processing industry that adopt all kinds of small quantity production type. Accordingly, analysis by extrusion screw is also consisting of several directions. Extrusion screw differentia is appeared much at material selection of screw itself and each screw design as parts that cause a lot of high temperature and high tension and attrition among processing of product and use purpose and that should do it so that working conditions back according to kind of used balance may optimize of each Screw are desirable. In this treatise, analyzed and analyze single-screw that is using developing in Human Resource Training Project for regional Innovation subject considering pressure, temperature etc.. of extrusion screw using CFdesign that is 3 dimensional analysis program.
This paper, coauthored by Chin-Se Chung, as well as other 5 faculty members at Hong-Ik University Department of Law (Jea-Hwang Jeong, Suk-Ho Bang, Tae-Hoon Ha, Seong-Deog Yi and Bong-Chul Choi), deals with liability issuses surrounding constitutional law, administrative law, civil law (contracts, torts), commercial law, criminal law, international law and philosophy & law. Professor of Law Jea-Hwang Jeong makes a comparative analysis of privacy protection and disclosure of information legal issues, appeared at current Korean law and draft of law in case of the latter one. He suggestes some desirable ways of legislation through revision process and operation of legal rules at his paper. Professor of Law Suk-Ho Bang makes a brief survey of civil liability issues arising out of contracts and torts in English and American law, first. He tries to show that many Parts of arguments in such legal world are attributed to Statute of Frauds tradition, unique to such legal world. New developments in the area of torts, including computer malpractice and computer virus, are shown and analysed in terms of application possibility under our current law. But, as even the Anglo-American courts are found very reluctant to accept those arguments as new grounds for torts liability, it seems more plausible and practicable to refer to contractual approach, basically, rather than to torts approach even under English American law. Professor of Law Chin-Se Chung suggests in his paper on EFT that the allocation of liability under EFT be made under the new and most relevant principle, working for useful transmission way of fund, not solely under traditional legal principles. If such new principle works with high return of risk to users, it makes imminent problems against the goats of consumer protection, and eventually will be hardly refered to. Conversely, if it requires too much sacrifice from the side of banks, then the convenience in such system will not be utilized. So, it may be natural that EFT be discarded even without proper functioning under market system. In conclusion, Professor Chung points out that, only when banks fond that the economy out of cost-saving at tasks outweighs the risk undertaken by the banks, the banks will operate the system. But, if this system makes more return of benefits to the banks with the burden of users, it is against the idea of equity. Consequently, the banks should bear the aggeviated risks in return for the cost saved under this system Professor of Law Tae-Hoon Ha focuses his research paper on criminal liability under EFT. He draws his conclusion out of current criminal statutes that illegal fund transfer under automatic teller machines, cash cards and information system can not be penalized due to lack of proper statutory provision. So, the criminal provision on computer crime, newly made on December of 1995, can be positively appreciated. But, he anticipates that the question whether such new provision will be successful in regulating all illegal activites at fund transfor system without any operation defects in criminal code, or will cause new problem in interpretation of criminal code remains unsolved. Professor of Law Seong-Deog Yi examines the international legal issues which may be given rise to by direct satellite broadcasting. In his paper, the issue of national jurisdiction in relation to direct satellite broadcasting is firstly dealt with. Secondly, the possible ways in which direct satellite broadcasting is regulated by international law are examined with special emphasis of two different approaches, that is, freedom of information approach and state sovereignty approach. In this context, many international conventions concerning direct satellite broadcasting in Particular, and international regulatory regime of outer space in general are broadly reviewed. Thirdly, the types of activities which may be a violation of international legal regime of direct satellite broadcasting are suggested and the possible lethal remedies for these violations are proposed with the traditional international state responsibility law in mind. Professor of Law Bong-Chul Choi explores the relations of computerized society to its laws throughout his paper as a kind of conclusion of this whole paper. Computerized society is one that the technical, scientific, informational knowledge prevails. With correspondence to the structural change in knowledge, the law of such a society has suffered transformation, and the knowledge and techniques distributing and computing legal responsibility has also changed. However, he does not insist that the diffusion of technical knowledge is the sole factor of the transformation of legal responsibility. It is only one of the various factors. Moreover, he does not deny the continuation between the classical techniques distributing legal responsibility and the contemporary ones. In this era, the law realizes fairness and community values at the expense of singularities. In addition, he proposes that legal scholars take the diagnosis of law from the perspective of the technology/knowledge shifts seriously.
The purpose of this study is an investigation of the transferred army facilities site affecting changes land use in the surrounding area. In this study follows analysis in three steps : first, finding of the concept of what transferred site is and the present state of the transferred army facilities site ; then, finding changes of land use in the surrounding area which the transferred army facilities site affects ; finally, suggestion of the right ways how the transferred army facilities site will be developed. In the future Not only army facilities but also other facilities will be transferred in the suburbs, Therefore transferred sites will be increased. We may development many site by means of various types. In this time we should recognize not only the transferred army facilities site but also a surrounding area. Through the ideas we can make sound development and transferred sites will operate well in the city belonging that site
This study attempts to seek a way of adequate application of the national preliminary examination to the entrane examination of university. Data of examinations during four years(1973-1976)was collected and corelation between two was analysed. The results of this analysis are as follows; a)the corelation between two examinations is very high. and, thus, the following is strongly recommendable; 1.7 multiples of capacity of student entollments may be primarily selected by means of preliminary examinations and the necesary or instrumental subject for the higher education may be imposed on these chosen applicants. b)dropping precedure in each curriculum is desireble because without this applicants are liable to devote themselves only to their interesting curricula disregarding others not well achieved.
This thesis is designed A/D converter that processes speech bandwidth of adapting from CCITT standard in trans-receiving stage of digital communication system. As Nyquist-rate A/D modulator method is implemented by one-chip this method generates problems such as actual area, capacitor loading, power consumption, complexity of AAF(Anti-Aliasing Filter) block and so on. Thus A/D converter is designed of using oversampling method that subjugates this problems to become more effective, able to obtain uniformed 8 bit output of oversampling to 200[KHz] analog input that is limmitted below 100[KHz] throughout AAF block.
Science textbook in South Korea(5th revised) and North Korea(current) are compared and analysed. The present study shows differences between both science textbooks which may be utilized in future after unification of the two countries. In primary education the south has more than the north in the page number of the textbook. In North Korean educational systems, the idolization of Kim Il-Sung and Kim Jung-Il is apparent. The textbooks of South Korea are made of better materials than those of North Korea. Covers, and illustrations are also of higher quality. Compositions are common in both country's textbooks as they deal with common everyday subjects. South Korean learns science uniformly. However, North Korean takes the unconnected, undeveloped, and ideological pass and also promotes the cramming as a system of education. In scientific terms, North Korea's textbooks show the differences in name, presentation.
The purpose of this study was to investigate the characteristics of formative assessment in elementary school science teaching. In order to examine the practices of formative assessment in science teaching, 8 science classes were observed and video-taped for each of two instructions. We also interviewed the teachers and students with semi-structured questions. The result indicated that the teachers used planned formative assessment and interactive formative assessment. Teachers assessed three aspects of student learning in science classroom: the student's personal, social and science development. However, the majority assessed in science teaching was science development. Teachers used observation, question and answer, dialogue, reports, and presentation as the formative assessment methods. The process of formative assessment was categorized as to get information, to judge and to give feedback. These three aspects were interrelated and interdependent. The type of question and feedback was influenced on the extent of the interaction between teachers and students.