디지털 확장환경에서 PDA 디자인개발을 위한 기초요소 연구

최병오,이길순 한국기초조형학회 2003 기초조형학연구 Vol.4 No.1

고도의 지식정보사회로 오면서 고객의 라이프 스타일과 계층의 다양화, 생활 및 소비의 개성화, 개별화의 진전으로 인한 사회구조의 다극화, 고도화가 이루어지면서 나타난 사이버 공간의 탄생과 인터넷의 확산은 산업과 정보, 지식 등에 실시간화를 촉진시켰다. 이러한 네트웍 기술은 인간의 감각과 감성, 행동, 라이프 스타일이 갖는 아날로그적인 욕구를 완전하게 충족시켜 줄 수 있는 능력을 보유하게 되었다. 따라서 이를 개선하기 위해서는 사용자를 고려한 편의성 개선이나 화면 그래픽을 통해 이루어지는 기능시나리오와 같이 인간의 감각과 정보처리 과정을 포함하는 인지과정에 대한 정밀한 분석과 이해가 우선 요구된다. 그리고 지금까지와는 다른 형태와 방식의 디자인 활동이 요구되며 디지털 환경에서는 디자인과 같이 소프트하고 창의적인 활동이 기업 경영의 가장 중요한 승부처가 되어야 할 것이다. 따라서, 본 연구에서는 사용자의 감성, 경험과 학습에서 인지된 상징성을 형상화하고, 재질의 변경에 따른 형태와 표면질감, 기능과 색상의 실험적인 적용을 통하여 제품의 물리적 기능과 함께 심미적 가치를 부여하며, 합리적이고 바람직한 방법을 통한 PDA 디자인개발을 위한 디자인의 기초요소에 관한 연구를 하고자 한다. As our society has become a highly developed society of intelligence and information, some elements such as lifestyle of customers, diversification of the classes, individualities of living and spending, multipolarized and highly advanced framework of society, have created cyberspace and have spread the use of the internet. And, that has also made the industry, information and knowledge real-time accessible. Nevertheless, digital technology and the products so far have been developed under the extension of engineering concepts, and these are too complicated and hard to use. To improve these points, close analyses and understanding on the sensing process including the sense of a human and the data processing such as Human Interface and Graphic User Interface, are required. So, design activities which are different from the previous forms and methods of activities, are required. And, in the digital environment, flexible and creative activities such as design should be the one of the most important elements in management. Therefore, in this thesis, we materializes cognized symbols through sense, experiences and learning of customers, give an aesthetical values to the physical function by applying shape and touch of the surface, colors and functions with the change of the materials, try to study on design of PDAs using reasonable and desirable methods.

점토굴착 사면의 거동에 관한 원심모형실험 및 수치해석

최민수,정길수,박병수,유남재 강원대학교 산업기술연구소 2005 産業技術硏究 Vol.25 No.B

This paper is the results of experimental and numerical works on analyzing the geotechnical engineering behavior and characteristics of excavated clay slope formed by the method of excavated replacement which is one of treatments in soft soil ground. For the centrifuge model tests, models of excavated clay slope were prepared by remolding the marine clayey soil sampled from the field. Tests were performed with changing the slope to investigate the behavior of them. On the other hand, numerical analyses were carried out to analyze the change of safety factor against instability of slope with time. Changes of pore water pressure, shear strength and displacement were also investigated. As results of centrifuge model tests with slopes of 1:1.5 and 1:3 using the confining body of simulating the effect of excavation, for the case of 1:1.5, slope failure occurred right after remove the confining body whereas relatively small displacements within the range of 3.2mm, implying to maintain the stability of slope, were observed for the case of 1:3 slope. From the results of numerical analyses using the software of PLAXIS to investigate the stability of slope after excavation, the minimum safety factor against slope failure was 1.28 for the case of 1:3 slope. The further researches in the future are required with considerations of build up of static pore water pressures during acceleration of centrifuge, depth of excavation influencing the behavior of the slope and permeability of the slope since excavation of the slope was not simulated well resulted from the limitations of apparatus at the stage of excavation during the centrifuge tests.

교대말뚝기초의 측방유동에 관한 원심모형실험

최동혁,정길수,박병수,유남재 강원대학교 산업기술연구소 2005 産業技術硏究 Vol.25 No.B

This paper is an experimental result of investigating lateral soil movements at piled bridge abutments by using the centrifuge model facility. Three different centrifuge model experiments, changing the methods of ground improvement at bridge abutment on the soft clayey soil (no improvement, preconsolidation and plastic board drain (PBD), sand compaction pile (SCP) + PDB), were carried out to figure out which method is the most appropriate for resisting against the lateral soil movements. In the centrifuge modelling, construction process in field was reconstructed as close as possible. Displacements of abutment model, ground movement, vertical earth pressure, cone resistance after soil improvement and distribution of water content were monitored during and after centrifuge model tests. As results of centrifuge model experiments, preconsolidation method with PBD was found to be the most effective against the lateral soil movement by analyzing results about displacements of abutment model, ground movement and cone resistance. Increase of shear strength by preconsolidation method resulted in increasing the resistance against lateral soil movement effectively although SCP could mobilize the resistance against lateral soil movement. It was also found that installment with PBD beneath the backfill of bridge abutment induced effective drainage of excess pore water pressure during the consolidation by embanking at the back of the abutment and resulted in increasing the shear strength of clay soil foundation and eventually increasing the resistance of lateral soil movement against piles of bridge abutment.

관광의 지속가능성(ST)구조 : 개념 모델의 개발

최병길,송재호 한국관광정책학회 2000 觀光政策學硏究 Vol.6 No.3

The purpose of this research is to build up the theoretical model which is structural and conceptual for the measurement of the Sustainability of Tourism(ST) in the tourist destination, founded upon the philosophy that environments, natural, cultural and social, should be preserved from the tourism as well as for the tourism. For the designation of the study model are chased and recombined previous related research results, which are roughly divided into four categories; ① Environments→Tourism System→Environments Model, ② Tourism Impacts as the Social Exchanges and Destination Residents' Attitude Model, ③ Tourism pro or anti Circulation Model, ④ Pressure→State→Response Model. As the result of these literature and article reviews is composed the exploratory study model in the context of conceptualization and structuralization as bellows, which can be applied to the practical measurement of the ST in the tourist destination. ◁그림삽입▷(원문을 참조하세요) Finally is proposed the methods and procedures for the empirical application of this study model to the measurement of ST and is discovered the policy implications, after which is discussed study subjects in need of continued research. The contents of this article are as follows : Ⅰ. Introduction Ⅱ. Conceptualization of ST and Related Research Trends Ⅲ. Development and Application of ST Model Ⅳ. Concluding Remarks and Policy Implications

비선형상태피드백을 이용한 송전용 무효전력보상기의 제어시스템 설계

최대길,한병문 명지대학교 대학원 1997 대학원논문집 Vol.1 No.-

This paper describes a control system design for the transmission STATCOM by applying a no-linear state feedback, and the performance analysis of the control system by simulations and scaled-model experiments. A mathematical model for the STATCOM was derived using a 3-phase equivalent circuit and a perturbation state equation with respect to a typical operating point. A transfer function to describe the dynamics of STATCOM was derived by considering non-linear state feedback. A controller design was completed by anaylzing the feedback system stability with bode plot and root locus methods. The performance analysis of the conceived control system was verified by simulations with the EMTP and experiments with scaled model, assuming that the STATCOM is connected to an 154kV transmission system. The results show that the conceived control system has excellant performance to control the reactive power of the transmission system.

Oyster-Zeolite 흡착탑을 이용한 하수의 유기물질과 질소제거

정병길,정유진,박성현,최호은,성낙창 東亞大學校 建設技術硏究所 2005 硏究論文集 Vol.29 No.1

The objective of this study is to investigated the removal possibility of organic matter and nitrogen contained final effluent of sewage treatment plant using oyster-zeolite adsorption column with waste oyster shell and natural zeolite. The raw water was collected the final effluent of Janglim sewage treatment plant in Busan city. The organic matter and T-N removal efficiency ranged from 2~60% and 38~97%, respectively. In conclusion, oyster-zeolite adsorption column could organic matter and nitrogen removal of final effluent of sewage treatment plant and its economical efficiency is enough because of using recycled waste oyster shell and a cheap natural zeolite.

Formaline 縮合에 있어서의 Pyridine의 觸媒作用

김병규,최내영,서길덕 부산대학교 공과대학 부설 생산기술연구소 1975 硏究報告 Vol.14 No.-

본 보문에서는 산화납, 피리딘 단독촉매및 산화납-피리딘 공촉매 존재 하에서 포름알데히드 수용액의 알돌형 축합을 시행하여 박층크로마토그라프 법으로써 축합생성물을 분리하고 반응속도 정수 및 활성화에너지를 구한 결과를 다음과 같이 보고한다. 1. 피리딘은 포름알데히드의 이량화반응에는 전혀 촉매능이 없었으며 디히드록시아세톤의 이량화 반응및 키시로즈-포름알데히드의 축합반응에는 상당한 촉매능을 보여 케토-헥소즈를 생성하였다. 2. 초기축합반응은 포름알데히드의 농도에 대하여 외견상 2차 반응이었다. 3. 45℃=65℃에서 반응은 Arrhenius식에 잘 맞았으며 반응속도 정수및 활성화에너지는 다음과 같았다. k_(pbo), 338˚k=10.1×10^(-3), k_(pbo, 328˚k)=7.2×10^(-3), k_(pbo), 318˚k=5.6×10^(-3), k_(pbo-pγridine, 338˚k)=9.6×10^(-3), k_(pbo-pγridine,328˚k)=7.0×10^(-3), k_(pbo-pγridine, 318˚k)=5.1×10^(-3), unit;1 mole^(-1) sec^(-1) ΔE_(pbo)=7.8(Kcal mole^(-1)), ΔE_(pbo-pγridine)=8.3(")

니트섬유강화 복합재료의 기계적 성질에 관한 연구

한길영,이동기,최병기,오환교,신용욱,전수영 조선대학교 에너지.자원신기술연구소 1999 에너지·자원신기술연구소 논문지 Vol.21 No.2

Using conventional textile techniques such as weaving, braiding, knitting and stitching it is possible to produce a wide range two and three dimensional fiber preforms. However, so far only a limited attention has been given to knitted fabrics in composite industry. This is mainly due to the opinion that knitted fabric reinforced composites posses low mechanical properties owing to their looped fiber architecture. But it is possible to obtain desired mechanical properties by selecting proper knitted fabric structure. In this paper, tensile failure load and displacement of one yarn, four yarns and knitted fabrics of ten yarns of kevlar fiber were determined experimentally in the unidirection. Mechanical properties of plain weft knitted fabrics reinforced composite intrusion beam for car side door application were investigated experimentally, which compared with desire value of American Fedral Motor vehicles Safety Standard (FMVSS) and presented the results.

대구광역시 장애인의 건강관심도, 건강실천행위, 건강상태

예민해,최병렬,감신,이희봉,심길택,이상수 한국건강관리협회 1998 건협 Report Vol.1 No.-

대구광역시 장애인의 의료이용양상과 결정요인

예민해,최병렬,감신,이희봉,심길택,이상수 한국건강관리협회 1998 건협 Report Vol.1 No.-