• 디지털융복합연구
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• 제13권9호
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• pp.99-104
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• 2015

생산관리능력은 IT 중소기업의 가장 필수적인 역량 중 하나이다. 따라서, 본 연구는 외부정보네트워크의 다양성 및 제조능력과 같은 주요 요인들이 IT 중소기업의 생산관리능력에 미치는 영향을 실증 분석하였다. 한국의 310개 IT 중소기업으로부터 수집된 데이터를 바탕으로 SPSS 버전 22를 사용한 최소자승 회귀분석 결과, 외부정보네트워크의 다양성은 IT 중소기업의 생산관리능력에 유의한 정(+)의 영향을 주며, 이러한 정(+)의 영향은 IT 중소기업의 제조능력에 의해서 완전 매개 되는 것으로 나타났다. 이러한 실증 분석 결과는 IT 중소기업의 외부정보네트워크의 다양성이 제조능력을 통해 생산관리능력에 정(+)의 영향을 미친다는 의미 있는 시사점을 제공한다.

• 반도체디스플레이기술학회지
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• 제10권1호
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• pp.33-41
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• 2011

Due to the recent quantum leaps forward in bio-, nano-, and information-technologies (BT, NT and IT), the precisionization and miniaturization of mechanical and electrical components are in high demand. In particular, the ITrelated equipments that take a great part in our domestic industry are in the area requiring high precision technologies. As a consequence, the researches on the development vibration isolation systems that diminish external disturbance or internal vibration are highly required. Among the components comprising the vibration isolation system, air spring has become on a focal point for the researchers due to its merits. This air spring is able to support heavy loads, keep a low natural frequency despite of having a lower value of stiffness, and control the performance of vibration isolation. However, sometimes the sole use of air spring is in demand due to some economic reasons. Under this circumstance, the damping effect of sole air spring may not enough to reduce sufficient amount of vibration. In this study, the air spring mount system connecting with an external chamber is proposed to increase or control the damping effect. To investigate its damping mechanism, the thermal and dynamic behaviors of the system is examined through a theoretical modeling approach in this part of research. In this approach, thermomechanical and Helmholtz resonator type models are to be employed for the air spring/external chambers and connecting tube system, respectively. The frequency response functions (FRFs) derived from the modeling effort are evaluated with physical parametric values and the effects of connecting tube length on these FRFs are identified through computer simulations.

• 대한정형도수물리치료학회지
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• 제24권2호
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• pp.29-36
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• 2018

Background: The purpose of this study was to investigate the effect of leg lift difference on serratus and upper trapezius when exercising in a scapula in a prone position, a typical waist stabilization exercise for subjects with a winged scapula. Method: Twenty normal adults and 20 subjects with winged scapula participated in the experiment. The surface EMG recordings were obtained from external oblique muscle and internal oblique muscle during scapula protraction exercise. The presence or absence of winging of the shoulder bone was measured using an electronic digital caliper for the distance the medial border of the scapula is lifted to the rear. In prostrate pier movement posture in both groups, both legs supporting, dominant leg lifting, and non-dominant leg lifting including the scapula protraction were conducted respectively. Results: In the results of comparison between the two groups, the dominant external oblique muscle and the non-dominant internal oblique muscle tended to increase according to the difference of the leg lifting of normal people. In the winged scapula group, internal oblique muscle showed increased muscle activity more than external oblique muscle. Conclusion: It was most effective to exercise with lifting the same position leg for strengthening the same external oblique muscle, and the opposite internal oblique muscle. Also, it is effective to exercise in prone pier movement posture for trunk stability. In addition, internal oblique muscle shows increased muscle activity in subjects with winged scapula. Therefore, appropriate adjustment of external oblique muscle and internal oblique muscle may have a positive effect on scapula dysfunction for trunk stability.

• 예술인문사회 융합 멀티미디어 논문지
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• 제6권6호
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• pp.395-402
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• 2016

과학기술의 발전과 수요의 변화로 인해 기업들은 빠른 환경변화에 직면하고 있다. 기업들은 이러한 환경변화에 대응하기 위해 공급망의 역량을 강화하기 위해서 노력하고 있다. 개선과정에서는 공급망의 참여자들 간의 협력적인 관계가 중요하며, 기업들은 내부적 활동을 다른 조직들에게 외주를 지고 프로세스 상에서의 낭비를 제거하기 위해 노력하고 있으며, 결과적으로 공급망은 지속적으로 간결하고 효과적인 상태가 되어간다. 본 연구는 외부 위험 하에서 낭비수준의 정도가 공급망 성과에 미치는 영향을 확인하고자 한다. 본 연구의 결과는 낭비 수준이 공급망 성과에 음의 영향을 미치고 있음을 보여준다. 또한 공급망 성과에 대한 낭비수준의 영향을 조직이 직면한 위험상황에 따라서 다르게 나타나고 있음을 보여준다. 즉 낭비의 수준이 높을수록 위험은 낭비수준과 공급망 성과 사이에서 조절효과가 있다. 이는 공급망 성과를 개선하기 위해서 내부적 효율성을 강화하는 것이 중요하지만, 외부적 위험을 적절히 관리하는 것이 우선적으로 선행되어야 함을 시사한다.

• 대한한방소아과학회지
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• 제26권3호
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• pp.20-29
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• 2012

Objectives The purpose of this case study is to report the effect of concurrent administration of Danguieumja-gagambang and external treatments on childhood psoriasis. Methods The subject is a child with psoriasis. This patient was treated with oriental herbal medicine (Danguieumjagagambang) and external treatments. The improvement of the skin condition is observed by Psoriasis Area and Severity Index (PASI) score. Results After the treatment, the symptoms of psoriasis were relieved. PASI score of this child went down from 4.7 to 0. Conclusions This study showed that concurrent administration of Danguieumja-gagambang and external treatments can be an effective choice for psoriasis.

• Wind and Structures
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• 제26권3호
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• pp.163-177
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• 2018

Tornadoes are one of the world's deadliest natural phenomena. They are characterized by short life span and danger. It has been observed through post-damage surveys that localities with large numbers of buildings suffer major damage during a tornado attack resulting in huge loss of life and property. Thus,it is important to study interfering buildings exposed to tornado-like vortices. The present study focuses on external and internal pressures developed on building models exposed to translating tornado-like vortices in the presence of an interfering building model. The effects of translating speed and swirl ratio of a tornado-like vortex on external and internal pressures for a principal building in the vicinity of an interfering building are investigated. Results indicate that external and internal pressures are enhanced or reduced depending on the location of the interfering building with respect to the principal building.

• 한국초전도ㆍ저온공학회논문지
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• 제5권1호
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• pp.87-91
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• 2003

According to the improvement of the HTS wires performance, several types of HTS superconducting machines are being developed. Stacked HTS tapes are used to conduct the current of the HTS power machines. To develop the HTS power machines, the critical current characteristics of a stacked HTS tapes in external field need be examined. In this paper, we present effect of the external magnetic field on the critical current of HTS stacked tapes. The critical current of various Hinds of multi-stacked HTS tapes in external magnetic filed are compare with that of a single HTS tape. Test results show that critical current of single HTS tape is smaller than that of multi-stacked HTS tape in the external field.

• 한국초전도저온공학회:학술대회논문집
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• 한국초전도저온공학회 2001년도 학술대회 논문집
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• pp.17-20
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• 2001

Stress/strain dependencies of the critical current I$_{c}$ in AgMgNi sheathed multifilamentary Bi(2212) superconducting tapes were evaluated at 77K. The external reinforcement was accomplished by soldering Ag-Mg tapes to single side or both sides of the sample. With the external reinforcement, the strength of tapes increased but I$_{c}$ decreased. The I$_{c}$ degradation characteristic according to the external reinforcement was improved markedly in terms of the stress although it appeared less remarkable on the basis of the strain. Effects of external reinforcement were discussed in a viewpoint of monitoring sensitivity of cracking in superconducting filaments by considering n-value representing the transport behavior of the current, which is closely associated with the location of them relative to the voltage-monitoring region in the tape. tape.

• 한국소음진동공학회논문집
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• 제19권6호
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• pp.569-574
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• 2009

The paper presents the influences of the external damping and the tip mass on dynamic stability of a vertical cantilevered pipe conveying fluid. In general, real pipe systems may have some valves and attached mechanical parts, which can be regarded as attached lumped masses and support-dampers. The support-dampers can be assumed as viscous dampers. The equations of motion are derived by energy expressions using extended Hamilton's principle, and some numerical results using Galerkin's method are presented. Critical flow velocities and stability maps of the pipe with external dampers and tip mass are obtained for various tip mass ratios, external damping coefficients and positions of the viscous dampers.

• 한국문헌정보학회지
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• 제29권
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• pp.231-255
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• 1995

This study is on the external environment of University library organization, to establish the theoretical background of scientific organization. The library is heavily influenced by its environment and much of the library manager's time is spent trying to reduce these envitronmental influences. The library, basic facility of the university has two environments: external and internal. The external environment is consist of educational, political, economical, cultural, technological and physical environment in society, Internal environment is consist of the university and the library condition. Several subjects of external environment which effect the construction of library organization are selected the elements of this study.