• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1993년도 하계학술대회 논문집 B
• /
• pp.615-617
• /
• 1993

Recently, the demand of electric power has increased remarkably in densely populated cities in Korea. Various method to increase the power transmission capability of underground cable lines has been investigated. In this paper presents the study of inner cool ins cable system for larger power transmission capability. It is also shown that designed inner cooling cable and their system proves more economic than conventional type cables.

• Nonlinear Functional Analysis and Applications
• /
• 제28권1호
• /
• pp.265-286
• /
• 2023

In this paper, we introduce and study a generalized Cayley operator associated to H(·, ·)-monotone operator in semi-inner product spaces. Using the notion of graph convergence, we give the equivalence result between graph convergence and convergence of generalized Cayley operator for the H(·, ·)-monotone operator without using the convergence of the associated resolvent operator. To support our claim, we construct a numerical example. As an application, we consider a system of generalized Cayley inclusions involving H(·, ·)-monotone operators and give the existence and uniqueness of the solution for this system. Finally, we propose a perturbed iterative algorithm for finding the approximate solution and discuss the convergence of iterative sequences generated by the perturbed iterative algorithm.

• Journal of Electrical Engineering and Technology
• /
• 제8권6호
• /
• pp.1424-1430
• /
• 2013

This paper presents design procedure of the magnetic bearings used for high-speed electric machines and flywheel energy storage systems. Magnetic bearing can be categorized by inner-rotor type and outer-rotor type according to the position of the rotary disc. These two types are applicable based on application environments such as application space, required attraction force, and controllability. Magnetic bearing is generally designed based on the ratio (geometrical coefficient or geometrical efficiency) of pole width to rotor journal radius but proper ratio is only decided by the analysis. This is the difficulty of the magnetic bearing design. In this paper, proper design technology of the inner-rotor type and outer-rotor-type eight pole magnetic bearings is introduced and compared with the FEM analysis results, which verifies the proposed design procedure is suitable to be applied to the design of the magnetic bearings for the industrial applications and flywheel energy storage system.

• 한국정보통신학회논문지
• /
• 제17권12호
• /
• pp.2853-2858
• /
• 2013

본 논문에서는 기상청, 교통관리센터, GPS, 센서 등을 이용하여 화물의 이동 경로, 컨테이너의 화물 보관 상태를 관리하는 지능형 운송 모니터링 시스템인 ITMS(Intelligent Transport Monitoring System)을 제안한다. ITMS는 컨테이너 내부의 온도 및 습도에 대한 정보, 화물 차량의 위치 정보를 ITMS 서버에 전송하는 CIMS(Container Inner Monitoring System), 화물 차량의 위치정보로 도착 예정시간을 산출하여 CIMS에게 전달하는 TMM(Transport Management Module), 수집한 컨테이너의 온도 및 습도 정보를 이용하여 화물의 신선도를 점검하고 관리하는 FMM(Freight Management Module), 그리고 CIMS, TMM, FMM으로부터 전달받은 정보로 컨테이너 하역 장소를 선정하고, 화물에 대한 정보를 RFID 라벨로 출력하여 컨테이너에 부착하는 SMM(Stevedoring Management Module)로 구성된다. 제안하는 ITMS는 CIMS를 이용하여 화물의 상태를 수시로 점검할 뿐만 아니라, RFID 라벨로 빠르게 화물의 정보를 획득하고, 관리하는데 소용되는 시간을 단축할 수 있다.

• Journal of applied mathematics & informatics
• /
• 제31권3_4호
• /
• pp.513-522
• /
• 2013

This paper mainly deals with the stochastic control system, the existence and uniqueness of solutions and the behavior of solutions are investigated. Firstly, we obtain sufficient conditions which guarantee the existence and uniqueness of solutions to the stochastic control system. And then, boundedness of the solution to the system is achieved under mean-square linear growth condition.

• 한국실내디자인학회논문집
• /
• 제21호
• /
• pp.154-165
• /
• 1999

It is characteristic that houses designed by Adolf Loos show commonly a contradictory aspect between the exterior and interior. The exteriors of the houses are simple and on the other hand the interiors are affluent to the greatest degree. At that time, a stylized gorgeous decoration of the inner space had been prevailed in general among the historicism and Vienna Secession people, and such an inner spatial conception as by Loos must have brought a turning point for the development of a new inner spatial conception which can by itself be called revolutionary. This study is gong to clarify the fact that Loos has been in full consideration of the emotional side basically for the human being in the conception of inner space, by complementing the respect that his conception of the inner spatial composition, concentrating purity, comfort and classicalism on the furniture. Despite the independency of the Loos furniture is near copying, different from existing creative conception, it can be meaningful in respect that it creates out a rather accustomed and still a new space thought adding a little transformation to the existing classical furniture. So this study is going to re-establish the characteristics of the Loos furniture which work as the greatest impact in the composition of affluent inner space, the prototypical characteristics of that furniture, and the basical thinking system of Loos which can be found out in a little transformatiov.

• 소성∙가공
• /
• 제20권7호
• /
• pp.512-517
• /
• 2011

TRB(Tailor Rolled Blank) is an emerging manufacturing technology by which engineers are able to change blank thickness continuously within a sheet metal. TRB door inner panels with required larger thicknesses can be used to support localized high loads. In this study, the aluminum alloy 5J32 TRB sheet is used for a door inner panel application. The TRB material properties were varied by using three heat treatment conditions. In order to predict the failure of the aluminum TRB during simulation, the forming limit diagram, which is used in sheet metal forming analysis to determine the criterion for failure, was investigated. Full-field photogrammetric measurement of the TRB deformation was performed with an ARAMIS 3D system. A FE model of the door inner panel was created using Autoform software. The material properties obtained from the tensile tests were used in the numerical model to simulate the door inner of AA 5J32 for each heat treatment condition. After finite element analysis for the evaluation of formability, a prototype front door panel was manufactured using a hydraulic press.

• 복식문화연구
• /
• 제14권3호
• /
• pp.443-456
• /
• 2006

The purpose of this study is to present inner wear design making use of domestic characters that can represent the emotions of those kidults, to develop differentiated products as a result of recent revitalization of inner wear industry and to propose the possibility of total marketing in domestic character industry. Three characters of Barunson, which leads the way in developing domestic character products for inner wear design to satisfy the needs of the emotional generation were selected and work began on the designs based on the selected characters' images and themes. The result of this study was as follows. First, adding new designs using characters to inner wear fits the trend. Second, it was able to expand a range of characters' marketability by developing inner wear designs using domestic stationary and fancy characters as motives, and to seek the possibility of developing 'total marketing' plans in domestic character industry. Third, we were able to recognize the possibility of domestic character development and the importance of design development by developing products making use of domestic characters rather than foreign characters.

• 한국기계가공학회지
• /
• 제18권11호
• /
• pp.96-102
• /
• 2019

Reverse engineering involves duplicating a physical part by measuring and analyzing its physical dimensions, features, and material properties. By combining reverse engineering with three-dimensional (3D) printing, engineers can simply fabricate and evaluate functional prototypes. This design methodology has been attracting increasing interest with the advent of the Fourth Industrial Revolution. In the present study, we apply reverse engineering and 3D printing technologies to evaluate a fabricated automotive inner ring prototype. Through 3D printing, inner rings of various densities were prepared. Their physical dimensions were measured with a 3D scanning system. Of our interest was the effect of inner ring density on the physical dimensions of the fabricated prototype. We compared the design dimensions and physical dimensions of the fabricated prototypes. The results revealed that even the 20% density of inner ring was effective for 3D printing in terms of satisfying the design requirements.

• 소성∙가공
• /
• 제14권3호
• /
• pp.257-262
• /
• 2005

In order to improve the quality of the sheared surface in cutting of inner structure bonded sheet metal the cut-off operation is mainly investigated, which is the typical shearing process in sheet metal forming technology. The sandwich sheet metals considered have inner structure which is constructed in the form of crimped expanded metal and woven metal. The inner structure is bonded between solid sheet by resistance welding or adhesive bonding. The shearing process is visualized by the computer vision system installed in front of the cut-off die and the sheared surface is measured and quantitatively compared with the help of the optical microscope after cut-off operation. From test results we found that the influence of sheared position can be observed and explained clearly and this result can be utilized to get the better sheared surface.