• Journal of Biosystems Engineering
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• 제27권6호
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• pp.557-564
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• 2002

Corrugated board is an efficient low-cost structure material fur the boxes that are widely used for transporting, storing and distributing goods. Corrugated board is also considered as an orthotropic because the principal material directions are the same as in paperboard. The purpose of this study was to elucidate the principal design parameters of ventilating box through the FEA on the various types of ventilating hole. From the viewpoint of the stress distribution and stress level, the optimum pattern and location of the ventilating hole were vertically oblong, and symmetry position with a short distance to the right and left from the center of front and rear panel. And, the optimum location and pattern of hand hole were a short distance to the top from the center of both side panels, and modified shape to increase the radius of curvature of both side in horizontal oblong. In general, the optimum pattern and location of both the ventilating hole and hand hole based on the FEM analysis were well verified by experimental investigation. It is suggested that decrease in compressive strength of the box could be minimized in the same ventilating hole area under the condition of the length of major axis of ventilating hole is less than 1/4 of box length, the ratio of minor axis/major axis is 113.5∼l/2.5, and number of the ventilating holes is even and symmetrical.

• Journal of Electrical Engineering and Technology
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• 제10권1호
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• pp.388-394
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• 2015

The inrush current of a large inductive load can be reduced with a soft starter; however, the large inrush current caused by simultaneous bulk starts (SBSs) cannot be effectively reduced. In order to reduce the high inrush current and voltage sag owing to the SBSs of large capacity inductive loads within a power network, a novel hybrid sequential start control system is proposed, implemented on embedded systems, and evaluated with a testbed in this study. From the experimental and simulation results of the proposed control system, the inrush current could be effectively restricted below the maximum current capacity of a power distributing board. Moreover, with the proposed system, power cost typically dictated by the peak power consumption can be fairly reduced, and the quality of the power system connected to the inductive loads can be efficiently increased.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 2013년도 춘계학술대회 초록집
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• pp.56-57
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• 2013

Plug-In MCCB는 전원부의 연결 단자가 없으며, 차단기 후면에 설치된 하우징 형태(housing type)의 플러그 유닛으로 부스바에 원터치(one touch) 설치 및 분리 등이 가능하다. 그러므로 차단기의 교체 시간이 짧고, 전원 복구가 신속하여 설비의 효율적 운용에 기여할 수 있다. 차단기의 후면에 있는 플러그 유닛이 동 부스바에 연결되었을 때 저항 특성을 초저항측정기(Resistance Tester)로 분석하였다. 3상 3선식 플러그인 배선용차단기를 동 부스바에 설치했을 때 R-phase과 플러그 단자 사이의 접촉 저항은 $0.51m{\Omega}$으로 확인되었다. 즉, 개발된 Plug-In MCCB를 이용하여 부스바에 설치할 때 접촉(속)부의 전기적 특성이 우수한 것을 확인할 수 있었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.129-130
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• 2011

본 연구에서 개발하고자 하는 다지점 배전반 온도 측정 및 제어를 위한 통합 프로그램 개발은 온도측정을 위해 광 온도 센서를 전력 수배전반에 적용 가능하도록 설계하여 수배전반 Bus Bar 온도를 실시간으로 현장에서 모니터링 하여 유무선 통신 융합으로 측정된 데이터를 모니터링하고 경보 발생시 SMS서비스를 이용하여 관리자에게 경보상태를 알리고 데이터의 DB화를 실시하여 원격 통합 상시 모니터링을 구축함으로써 전력기기의 안정성을 향상 시킬 수 있다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 C
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• pp.1654-1656
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• 1996

Generallly speaking, busbar made with Cu or Cu alloys and producted by plastic manufacturing process. In this study, we reacarch the trend and manufacturing of Cu clad Al busbar for low cost and light weight which used for a electric power suply of distributing board. The objectives of this study is the trend of busbar on electric power supply, the process and application for Cu clad Al busbar and the relation between electric properites and manufacturing operating process on contact parties

• 대한전기학회:학술대회논문집
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• 대한전기학회 2015년도 제46회 하계학술대회
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• pp.1313-1314
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• 2015

본 논문에서는 수배전반에 적용되는 내진 자동 복귀 시스템에 대해 연구 하고 그에 따라 시스템을 구성하였다. 내진 시험을 통해 내진 장치의 자동 복귀 시스템이 동작함을 검증하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 C
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• pp.1449-1451
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• 1997

Busbar made with Cu or Cu alloys and producted by Plastic manufacturing process. In this study, we research the manufacturing trend of Cu clad Al busbar for low cost and light weight which used for a electric power supply of distributing board. The objectives of this study is the manufacturing of composite busbar on electric power supply, the process and application for Cu clad Al busbar and the relation between electric properties and manufacturing operating process on contact parties.

• 한국컴퓨터정보학회논문지
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• 제21권2호
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• pp.1-7
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• 2016

In this paper, we propose in this paper present a novel locality data allocation policy as COLD(Correlated Locality Data) allocation policy. COLD is defined as a set of data that will be updated together later. By distributing a COLD into a NAND block separately, it can preserve th locality. In addition, by handling multiple COLD simultaneously, it can obtain the parallelism among NAND chips. We perform two experiment to demonstrate the effectiveness of the COLD data allocation policy. First, we implement COLD detector, and then, analyze a well-known workload. And we confirm the amount of COLD found depending on the size of data constituting the COLD. Secondly, we compared the traditional page-level mapping policy and COLD for garbage collection overhead in actual development board Cosmos OpenSSD. Experimental results have shown that COLD data allocation policy is significantly reduces the garbage collection overhead. Also, we confirmed that garbage collection overhead vary depending on the COLD size.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 춘계학술대회 논문집
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• pp.380-383
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• 2009

The grounding system of the subsurface should ensure the safe and reliable operation of power systems, and guarantee a human being's safety in the situation of grounding fault in the power system. The safety of power apparatus in the subsurface can be reached by decreasing grounding resistance and grounding potential rise of subsurface. This paper presents a method based on the design of an artificial neural network(ANN) model for modeling and predicting the relationship between the grounding resistance and temperature-humidity in the subsurface.

• 한국정보처리학회논문지
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• 제6권11호
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• pp.3034-3045
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• 1999

For efficiently providing multimedia services, distributed computing environments are specified the requirements of various services and distributed object platforms applied an object-oriented technology by TINA Consortium and OMG CORBA. Because multimedia service applications are becoming large and distributing, their servicing managing interfaces among objects are being complicated. In order to solve these defects, it is necessary to suggest a new object grouping model and specify object service/management requirements can be introduced under the object groups. We have been developed the distributed object group platform that can group all individual objects by the relating services and can supply trading functions for interconnecting between distributed objects or object groups. In this paper, we designed and implemented the Virtual Drawing Board for remote equational services on the distributed object group platform we mentioned above. As results, we designed a basic structure and service interfaces, and showed execution procedures of VDB system consisted of distributed objects and objects groups for educational services. For supporting distributed services of VDB system, we used three kinds of tools as follows; IONA orbix 2.2 of CORBA compliance as an object middleware, OrbixTrader 1.0 for interconnection of distributed objects, and the OGTG we developed for interconnection of distributed object groups and checking access rights of objects included in an arbitrary object group.