• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2005년도 춘계학술대회 논문집
• /
• pp.714-717
• /
• 2005

The concept of jigs and fixtures makes it possible to build fixtures that can be dismantled at project completion. Since this concept is modular, it is not limited to any particular unit shapes or sizes. Various standards assure that each component assemble rapidly, to get precision and accuracy. Best suited for prototype and low volume production, as well as, start-up or zero-runs, it can also substitute for damaged dedicated fixtures to minimize down-time. It need to do DB for each part by Pro/Engineer and to assemble before manufacturing. In the future will assemble each of clamping and position parts by automation.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2004년도 학술대회 논문집 전문대학교육위원
• /
• pp.17-20
• /
• 2004

This paper is presented for the development of the brushless DC(BLDC) motor for the spindle motor of hard disk drives. To design the spindle motors for HDD, it is very important to consider the reduction of vibration and noises. To design the each parts and investigate the assemble of a motor, we need to calculate the press force and size variation according to the press force. If we design the each parts without the consideration of the size variation, we can not get good result of assemble and performance with exact size of parts. In this paper, we get the computer simulation results to verify optimal size and assemble.

• 대한산업공학회지
• /
• 제22권3호
• /
• pp.413-426
• /
• 1996

Modern society, as a result of high industrial technology, is characterized by a series of mass production, moss consumption and mass disposal. As the mass disposal is known as the major culprit of destroying ecological system of our environment, human prosperity is in turn threatened by this indiscrete activities. Under current industrial technology which pursuit maximum profit, environmental problems could not be solved. This paper proposes recycle manufacturing systems of assemble products as a measure of current non-recycle manufacturing systems. Products are also composed of a number of ports. All parts are represented by a function of time cost performance variable as reuse level. We develop on information systems which give all the information on reused and recycled parts. We try to implement this result on a real fields. We confide ourselves to the contribution to on effective solution of environmental problems and to give profit to assembly manufacturing and consumers.

• International Journal of Advanced Culture Technology
• /
• 제9권4호
• /
• pp.1-8
• /
• 2021

Since the late 20th century, various projects in the public domain where local communities and art organizations collaborate have been attempted in miscellaneous ways. In terms of anticipating an active attitude of the community, socially engaged project focuses on proactively changing everyday life and environment of people. An art collective, Assemble who won the Turner Prize in 2015 for one of their projects named Granby Four Streets (2013) has been admitted as an exemplary of this phenomenon, and it appears frequently in discussions about community-led projects. We investigate Granby Four Streets, as well as the documentation formed by the perspective of third parties based on the surveillance and criticism aspects. It asserts that the limitation of socially engaged projects that are kept ephemerally and easily forgotten could be overcome with the concept of documentation and its practice.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 1997년도 춘계학술대회 논문집
• /
• pp.307-311
• /
• 1997

This paper describes influence of thermal deformation on nosic characteristics in high speed spindle systems. Heat generation in front, rear spindle bearings and built in motor lead to diverse thermal deformation of headstock with time. This deformation changes assemble tolerance in bearing housing, especially to elliptic form. The elliptic assemble tolerance generate high nosie level with dominant amplitude in double rotational frequency.

• 한국콘크리트학회:학술대회논문집
• /
• 한국콘크리트학회 2000년도 가을 학술발표회 논문집(II)
• /
• pp.897-902
• /
• 2000

In most of large panel pre-cast concrete system, the narrow joints have inefficiency to assemble several panels and structural problems due to their complicated process after construction. To improve, practically, structural performance and inefficiency to assemble, the behavior and strength of new wide joints method should be investigated experimentally. The result is that the shear force of wide joints is similar to that of loop joints, or more than. It seems that the use of wide joints is the possible methods in a construction field.

• 월간포장계
• /
• 통권134호
• /
• pp.84-88
• /
• 2004

• 한국통신학회논문지
• /
• 제36권2B호
• /
• pp.111-119
• /
• 2011

최근에 Green IT 에 대한 관심이 증가함에 따라 네트워크 장치에서 발생하는 에너지의 소비를 줄이기 위한 연구가 지속적으로 증가하고 있다. 본 논문에서는 수면모드 (sleeping mode)를 이용하는 OBS 네트워크에서 트래픽 패턴 및 버스트 어셈블 알고리즘이 에너지 절감율과 지연시간에 미치는 영향을 분석한다. 이를 위하여 OPNET Modeler 를 사용하여 지수 분포와 파레토 분포를 가지는 트래픽 생성 모델과 시간 및 길이 기반의 버스트 어셈블 알고리즘을 수행하는 라우터 모델을 구현하고 시뮬레이션을 수행한다. 구현된 시뮬레이터를 통하여 트래픽 패턴 및 버스트 어셈블 방식에 따른 슬리핑 시간, 상태 천이 횟수, 패킷 지연시간 및 에너지 절감율을 측정하고 분석한다.

• 경영과학
• /
• 제29권3호
• /
• pp.121-134
• /
• 2012

In this study, we consider a component procurement planning problem where the procurement amounts of components are determined under assemble-to-order systems with demand uncertainty. In the problem, procurement amount of each component is decided before the demands of finished products are known and after the demands are identified the assembly amounts of the finished products are decided. In this study, the objective function of the problem is minimizing the total costs which are composed of purchase and inventory costs of the components and the backorder costs of the finished products. We assume that the uncertain demand information is given as multiple scenarios of the demands, and we propose procurement planning methods based on stochastic models which considering the multiple demand scenarios. To evaluate the performances of the proposed methods, computational experiments were carried out on the proposed methods as well as benchmarks including a method based on deterministic mathematical model and a heuristic. From the results of the computational tests, the superiorities of the proposed methods were shown.

• BMB Reports
• /
• 제37권6호
• /
• pp.735-740
• /
• 2004

Hepatitis C virus (HCV) is a causal agent of the chronic liver infection. To understand HCV morphogenesis, we studied the assembly of HCV structural proteins in insect cells. We constructed recombinant baculovirus expression vectors consisting of either HCV core alone, core-E1, or core-E1-E2. These structural proteins were expressed in insect cells and were examined to assemble into particles. Neither core-E1 nor core-E1-E2 was capable of assembling into virus-like particles (VLPs). It was surprising that the core protein alone was assembled into core-like particles. These particles were released into the culture medium as early as 2 days after infection. In our system, HCV structural proteins including envelope proteins did not assemble into VLPs. Instead, the core protein itself has the intrinsic capacity to assemble into amorphous core-like particles. Furthermore, released core particles were associated with HCV RNA, indicating that core proteins were assembled into nucleocapsids. These results suggest that HCV may utilize a unique core release mechanism to evade the hosts defense mechanism, thus contributing to the persistence of HCV infection.