• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2008년도 춘계학술대회 논문집
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• pp.439-443
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• 2008

We investigate the mechanical behavior of a pre-heat treated steel of ESW95, which is being used for automotive parts including tie-rods to save manufacturing cost and enhance product quality. SCM435 is also investigated to reveal the characteristics of the pre-heat treated steel tested. AFDEX/MAT is used to extract the true stress-strain curve over the large strain with higher accuracy. It has been found that ESW95 has very week strain-hardening behavior which can be negligible compared with SCM435 and that the initial yield strength is quite high and the toughness of ESW95 reaches nearly 75% of SCM435. ESW95 is characterized by the weak strain-hardening behavior and high yield strength that can be lead to minimization of post-processing including heat treatment and straightening. ESW95 and SCM435 are also compared by applying them to ball-stud forging by computer simulation. It is expected that a great deal of change may take place in production as well as in service if the pre-heated steels are adopted.

• 한국전문물리치료학회지
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• 제23권3호
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• pp.11-20
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• 2016

Background: A forward head posture (FHP) is one of the most common types of poor head posture in patients with neck disorder. A prolonged FHP might increase pressure on the posterior cranio-cervical structure and exhibit reduced performance on a cranio-cervical flexion test (CCFT). CCFT is included to activate deep cervical flexor muscles and inhibit excessive activation of superficial cervical flexor muscles. Therefore, the selective activation of deep cervical flexors is needed for effective exercise for FHP. Objects: The purpose of this study was to compare muscle thickness between longus colli (Lco) and sternocleidomastoid (SCM) using ultrasonography in subjects with FHP depending on head support. Methods: This was a cross-sectional, case-control research design study. The ultrasonographic images of Lco and SCM were taken in 17 subjects with FHP during the 5 phases of the CCFT with and without a head support. Towel was used for supporting head to make the neutral head position in supine. Changes in muscle thickness during the test were calculated to infer muscle activation. Data were analyzed using repeated measures of two-way analysis of variance with the significance level of .05. Results: When subjects performed the CCFT with head support, there was a significant difference in muscle thickness of Lco and SCM (p<.05). According to a post hoc paired t-test, change of thickness of Lco was greater at all phases, and change of thickness of SCM muscle was less at phase 4 and 5 in condition with head support (p<.01) compared to condition without head support (p<.01). Conclusion: The result of this study suggest that applying head support for neutral head position during CCFT could be a useful method for activating Lco muscle without excessive activation of SCM muscle.

• Korean Chemical Engineering Research
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• 제58권2호
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• pp.209-223
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• 2020

석유화학 제품, 컴파운드(Compound), 전지, IT 소재, 첨단소재, 제약 등 다양한 제품 군의 사업을 보유하고 있는 화학 회사에서 각 사업 부분에 있어 수요 예측, 물류, 생산, 재고, 원재료 공급의 SCM (Supply Chain Management)은 사업의 손익과 직접적으로 연결되기 때문에 그와 관련된 최적화와 시스템 역량 수준은 매우 중요하다. 본 연구는 다양한 사업 군에서 각각의 SCM이나 비효율적 영역을 개선하는 등의 역량을 고도화하기 위해 원재료를 공급하고, 제품을 생산하기 위한 공급/생산 계획 등에 있어서 수학적 최적화 방법을 적용한 사례에 관하여 다룰 것이다. 그리고 학술적인 연구에 그치는 것이 아니라 계획 수립 담당자가 실제로 자신의 일부 업무에 활용하는 것이 중요하므로 이를 위해 추가적으로 필요한 사항들을 서술하였고 각각의 적용 성과를 표현하였다. 소개가 될 사례의 첫 번째에서는 편광판 생산에 있어서 원재료 로스(Loss)를 최소화하는 것을 기반으로 하는 공급계획 최적화, 최적 손익 사업 운영계획, 편광판 연신 생산 공정의 스케줄(Schedule) 최적화를 다룰 것이다. 두 번째 사례로는 PO (Poly Olefin) 공정의 생산성 극대화를 위한 생산/포장계획 최적화에 관하여 다룰 것이고, 세 번째 사례로는 전지 생산에 있어서 전극 모델 교환을 최소화 시키는 생산계획 최적화에 대해 다룰 것이다. 네 번째로는 석유화학 특성상 선박으로 대부분의 원료 입하 및 제품 출하를 하기 때문에 한정된 부두에 여러 가지 원료 입고와 제품 출하를 위한 선박이 접안 하는 일정을 최적화 한 사례를 다룰 것이며, 마지막으로 ABS (Acrylonitrile Butadiene Styrene) 반제품 생산에 있어서 제품 Change를 최소화 하는 생산계획 최적화를 다룰 것이다.

• 한국정밀공학회지
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• 제30권4호
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• pp.397-402
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• 2013

In this study, we carried out the each lines of section, using GC (green silicon carbide) whetstone, the SCM415 material which separated by after and before heat treatments process, in 3+2 axis machining centers for integrated grinding after cutting end mill works, the spindle speed 8000 rpm and feed rate 150 mm/min. For the analysis of the centerline average roughness (Ra), we measured by 10 steps stages. Using Finite element analysis, we found the result of the load analysis effect of the assembly parts, when applied the 11 kg's load on both side of the ATC (Automatic tool change) arm. The result is as follows. For the centerline average roughness (Ra) in the non-heat treatment work pieces, are appeared the most favorable in the tenth section are $0.510{\mu}m$, that were shown in the near the straight line section which is the smallest deformation of curve. In addition, the bad surface roughness appears on the path is to long by changing angle, the more inclined depth of cut, because the chip discharging is not smoothly.

• 한국전문물리치료학회지
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• 제25권2호
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• pp.62-70
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• 2018

Background: The craniocervical flexion (CCF) exercise is one of the effective exercise in correcting forward head posture (FHP). However, some people with FHP achieve CCF with compensatory movements, for example, low cervical flexion using superficial neck flexors such as the sternocleidomastoid (SCM) muscle. No study has yet investigated whether a dual­pres ure biofeedback unit (D-PBU) method to prevent low cervical flexion would be helpful in performing pure CCF movement. Objects: The purpose of this study was to compare the effects of the CCF using D-PBU method and the traditional CCF method on the cross-sectional area (CSA) of the longus colli muscle (LCM) and the activity of SCM muscle in subjects with FHP. Methods: Twenty­four FHP subjects (male: 16, female: 8) were recruited for this study. All subjects performed CCF using two different methods: the traditional CCF method and the CCF using D-PBU method. The CSA of the LCM was measured via ultrasound, and surface electromyography was used to measure SCM muscle activity. Results: The change in CSA of the LCM was significantly larger during the CCF using D-PBU method ($1.28{\pm}.09$) compared with the traditional CCF method ($1.19{\pm}.08$) (p<.05). The SCM muscle activity using the CCF using D-PBU method ($2.01{\pm}1.97$ %MVIC) was significantly lower than when using the traditional CCF method ($2.79{\pm}2.32$ %MVIC) (p<.05). Conclusion: The CCF using D-PBU method can be recommended for increasing LCM activation and decreasing SCM muscle activity during CCF movement in subjects with FHP.

• 한국빅데이터학회지
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• 제1권2호
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• pp.65-78
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• 2016

기업 환경의 급격한 변화와 복잡성의 증가에 따라 다양한 장점을 지닌 기업들이 협력을 통해 고객에게 짧은 시간에 최상의 가치를 제공해주는 것이 중요해 지고 있다. 이를 위해 기업은 다양한 공급망에 참여하게 되고, 기업의 공급망 관리에 대한 중요성은 점차 증대되고 있다. 이러한 공급망 관리의 효율성을 높이기 위해 공급망 상에서 생성되는 데이터의 효과적인 분석이 필요하다. 본 연구에서는 프로세스 마이닝 기법을 활용한 공급망 데이터 분석을 제안한다. 프로세스 마이닝 기법이 적용 가능한 공급망 데이터의 분석 범주를 도출하고, 프로세스 마이닝을 활용한 다양한 분석을 제안하다. 이를 통해 기업은 공급망 관리에 대한 인사이트를 얻고 공급망 관리 프로세스의 개선 및 효율화가 가능하다. 사례 연구를 통해 프로세스 마이닝을 활용한 공급망 데이터 분석의 유효성을 검증하였다.

• 사상체질의학회지
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• 제21권3호
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• pp.1-16
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• 2009

1. Objectives: This research was proposed to find out the pathology of Soyangin in Sasang Constitutional Medicine(SCM). 2. Methods: The related contents of the pathology of Soyangin were selected in Je-Ma Lee's literatures such as "Dongmu-YuGo(東武遺稿)"(DYG), "Donguisusebowon-SaSangchobongyun(東醫壽世保元四象草本卷)"(DSS), "Donguisusebowon-GabObon(東醫壽世保元甲午本)"(DGO), "Donguisusebowon-ShinChukbon(東醫壽世保元辛丑本)"(DSC), and the research was written in order to find out the physiology and pathology of Soyangin in SCM. 3. Results and Conclusions: The chronical change of pathologic concept in Soyangin diseases as follows : Pathology in Soyangin diseases was much Hot Qi(熱氣), and more ascending Qi, less descending Qi in DYG, DSS. In "Discourse on the viscera and bowels" of DGO and DSC, Soyangin has a circulation of Water-Food Hot Qi of Spleen Group(脾黨) and Water-Food Cold Qi of Kidney Group(腎黨). Exterior Disease(表病) was the injury of Exterior-Qi such as mouth-hip Qi(口膀胱氣) by Anger-Nature-Qi(怒性氣), and Interior Disease(裏病) was the injury of Interior-Qi such as kidney-large intestine Qi(腎大腸氣) by Sorrow-Emotion-Qi(哀情氣). All diseases of Soyangin are caused by insufficient Cool Yin Qi(陰淸之氣) in Kidney Group(腎黨), so the pathology of Soyangin was focused on Requisite energy(保命之主) and each small viscera and bowels(偏小之臟). In this viewpoint, the schema of Soyangin diseases such as Soyangsangpoong-syndrome(少陽傷風證), Kyulhyung-syndrome(結胸證), Mangeum-syndrome(亡陰證), Hyungkyukyeol-syndrome(胸膈熱證), Sogal-syndrome(消渴證) and Eumhuoyeol-syndrome(陰虛午熱證) were designed to explain the mechanism of each syndrome.

• 사상체질의학회지
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• 제21권2호
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• pp.27-41
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• 2009

1. Objectives : This research was proposed to find our the pathology of Soeumin in Sasang Constitutional Medicine(SCM). 2. Methods : The related contents of the pathology of Soeumin were selected in Je-Ma Lee's literatures such as "Dongmu-YuGo(東武遺稿)"(DYG), "Donguisusebowon-SaSangchobongyun(東醫壽世保元四象草本卷)"(DSS), "Donguisusebowon-GabObon(東醫壽世保元甲午本)"(DGO), "Donguisusebowon-ShinChukbon(東醫壽世保元辛丑本)"(DSC), and the research was written in order to find out the physiology and pathology of Soeumin in SCM. 3. Results and Conclusions : The chronical change of pathologic concept in Soeumin diseases as follows: Pathology in Soeumin diseases was much Cold Qi(寒氣), and more descending Qi, less ascending Qi in DYG, DSS. In "Discourse on the viscera and bowels" of DGO and DSC, Soeumin has a circulation of Water-Food Hot Qi of Spleen Group(脾黨) and Water-Food Cold Qi of Kidney Group(腎黨). Exterior Disease(表病) was the injury of Exterior-Qi such as eye-shoulder Qi(目膂氣) by Pleasure-Nature-Qi(樂性氣), and Interior Disease(裏病) was the injury of Interior-Qi such as spleen-stomach Qi(脾胃氣) by Joy-Emotion-Qi(喜情氣). All diseases of Soeumin are caused by insufficient Warm Yang Qi(陽煖之氣) in Spleen Group(脾黨), so the pathology of Soeumin was focused on Requisite energy(保命之主) and each small viscera and bowels(偏小之臟). In this viewpoint, the schema of Soeumin diseases such as Ulkwang-syndrome(鬱狂證), Mangyang-syndrome(亡陽證), Taeum-syndrome(太陰證) and Soeum-syndrome(少陰證) were designed to explain the mechanism of each syndrome.

• 지능정보연구
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• 제13권3호
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• pp.47-61
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• 2007

기업 운영에서 SCM (Supply Chain Management)의 중요성이 인식되면서 공급, 생산, 분배 등의 기능들을 통합적으로 관리하는 새로운 접근법의 필요성이 커지고 있다. 이 접근법은 여러 다른 기능들의 의사결정 문제를 하나의 통합된 최적화 모델로 분석하는 방법이다. 특히 공급사슬의 통합적인 운영을 위해서는 이전의 확정적 방법론 보다는 보다 구매자와 공급자의 관계를 유연하게 통합해 줄 수 있는 방법론이 필요하다. SCM은 대규모 문제이고 또한 다양한 내외 요인에 의해 기존의 설정된 계획 내용이나 상황이 항시 동적으로 변경될 수 있기에, 이들 정보를 통합 계획에 반영될 수 있도록 하여야 한다. 본 연구에서는 SCM의 핵심이 되는 생산계획과 분배계획 문제들을 효율적으로 통합할 수 있는 유전 알고리즘 (Genetic Algorithm)을 제시하고, 유전 알고리즘을 기반으로 동적 SCM을 위한 멀티 에이전트 시스템을 구현한다. 한편 통합계획 문제에서 유전 알고리즘을 통해 100%에 근접하는 최적해를 구하였고, 통합계획으로 얻은 결과와 통합 계획을 하지 않은 경우의 결과 값에서 큰 차이를 확인 할 수 있었다.

• KSBB Journal
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• 제32권1호
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• pp.46-53
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• 2017

There are four types (So-Eum, So-Yang, Tae-Eum, Tae-Yang type) in Sasang constitutional medicine (SCM). In SCM, not only people but also herbal medicine are classified into four types. To date, there has been very little evidence of experimental classifications in SCM. So, we adapted Issatchenkia orientalis in two different culture media made from the herbal medicines for So-Eum and for So-Yang type. And the adapted Issatchenkia orientalis was inoculated into another eight culture media made from the herbal medicines for So-Eum and for So-Yang type. The mass reduction was measured every 12 hours for 2 days. Then, we analyzed the statistical differences of herbal medicines for So-Eum and for So-Yang type. There were significant differences of variables (R: rate of change in mass reduction, S: convex degree of mass reduction graph) in herbal medicine media for So-Eum (p=0.001, 0.001, respectively.). Suggesting a microbiological method of Sasang medicine research, current study may contribute to the establishment of experimental Sasang constitutional herbal medicine.