• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.3
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• pp.1229-1237
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• 2012

This study aimed to investigate the effect of hand grip force on the activity of shoulder muscles in 2 arm postures. The muscle activity of the upper trapezius, lower trapezius, infraspinatus, anterior deltoid, and posterior deltoid muscles in 22 healthy subjects (11 men and 11 women) were measured using surface electrodes during 4 hand gripping tasks (0%, 30%, 50%, and 70% of maximum voluntary contraction) in 2 shoulder positions (neutral position and $90^{\circ}$ elevation position). Among changing grip force significantly differenced infraspinatus, anterior deltoid, and posterior deltoid muscles' activity in the shoulder neutral position(p<0.05). In the shoulder $90^{\circ}$ elevation position, anterior deltoid, posterior deltoid muscles' activity was significantly differenced(p<0.05). Hand gripping was found to alter muscle activation. The hand grip task activated the infraspinatus muscle in the neutral position and inhibited the deltoid muscle in the $90^{\circ}$ elevation position. This finding may prove useful for the development preventative measures and rehabilitation strategies for shoulder injuries.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2002.05a
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• pp.307-312
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• 2002

새로운 산업 구조와 변화된 사회 환경으로 인해 우리나라에서 최근 급증하고 있는 직업병 중의 하나가 직업 성 근골격계질환(Work-related Musculoskeletal Disorders, WMSDs)이다. 이 질환은 특정한 신체 부위의 반복 작업과 불편하고 부자연스러운 작업 자세, 강한 노동 강도, 과도한 힘, 불충분한 휴식, 추운 작업 환경, 진통 등이 원인이 되어 목, 어깨, 팔꿈치, 손목, 손가락, 허리, 다리 등 주로 관절 부위를 중심으로 근육과 혈관, 신경 등에 미세한 손상이 생겨 결국 통증과 감각 이상을 호소하는 근골격계질환의 만성적인 건강장해다.(중략)

• Clinics in Shoulder and Elbow
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• v.10 no.2
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• pp.175-182
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• 2007

Purpose: This study compared the SLAP lesions caused by a sports-induced injury with those caused by a non-sports-induced injury. Materials and Methods: The study was performed on 54 patients who had undergone arthroscopic surgery for a SLAP lesion. There were 21 sports-induced-injury patients (group I) and 36 non-sports-induced injury patients (group II). The mean age of the men was 36 years and that of the women was 48 years. In both groups, the frequency of a concomitant injury and the clinical outcomes at the last follow-up was evaluated using the UCLA score, Rowe score, and the ASES score. Results: According to their injury mechanism, , there were 14 cases (67%) of repeated microtrauma injury in group I and 25 cases (75%) of compression injury type in group II. As a concomitant pathology, there was 11 cases of shoulder instability and 5 cases of a rotator cuff tear in group I, and 23 cases of rotator cuff tears and 14 cases of shoulder instability in group II. At the last follow up, group I showed slightly better clinical satisfaction (P>0.05). Conclusion: The possibility of a SLAP lesion accompanying other diseases is high. Therefore, an accurate assessment of concomitant injury lesions before surgery is important for the treatment outcome.

• Journal of Korean Orthopaedic Sports Medicine
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• v.3 no.2
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• pp.98-99
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• 2004

소절개 봉합술은 관혈적 봉합술에 비해 동반된 관절와 상완 관절(glenohumeral joint) 내의 병변을 확인하고 이에 대한 처치를 시행할 수 있으며, 견봉하 감압술과 함께 동반된 견봉 쇄골 관절의 병변을 치료할 수 있다. 또한 삼각근 기시부에 대한 손상을 최소화하기 때문에 빠른 재활과 조기 퇴원을 시행할 수 있는 등의 장점이 있다 관절경적 봉합술에 비해서는 수술 술기가 어렵지 않기 때문에 항상 좋은 결과를 기대할 수 있다 회전근 개 파열에 대한 수술을 시행할 때 관절경적 봉합술이 모든 경우에서 관혈적 또는 소절개 봉합술에 비해 좋은 결과를 나타내는 것은 아니다. 환자가 심한 골다공증이 있는 경우, 기술적 문제가 있는 경우, 봉합 후 회전근 개에 지나친 긴장이 염려될 때는 항상 소절개 봉합술로의 전환을 시도하여야 한다. 소절개 봉합술을 시행한 경우에도 관절경적 봉합술시와 비슷한 좋은 결과를 얻을 수 있고, 치료의 결과는 수술의 방법보다는 정확한 술기 및 수술 전 환자의 상태에 좌우된다고 하겠다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.07a
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• pp.145-146
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• 2019

본 논문에서는 파킨슨병이 우리 사회에서 증가하고 있고 노인들 만이 아니라 젊은 사람들에게도 나타날 수 있기 때문에 환자들을 위해 근 기능 및 인지능력을 향상 시키는게 목표이다. 파킨슨병은 현재까지 원인이 알려지지 않았지만 도파민 세포가 손상되는 것으로 알려져 있기 때문에 아직은 약물치료와 식이요법 치료를 통해 질환의 증상을 중지시키거나 느리게 할 수 없다. 파킨슨병의 증강 중 가장 중심이 되는 근 기능 문제와 인지능력을 동시에 향상 시킬 수 있는 기대를 할 수 있으며 이것을 통해 다른 증상들도 느려 질 수 있도록 하는 기대를 할 수 있다. 프로그램을 통한 근 기능 능력이나 인지능력을 동시에 향상하고 대상자 개개인의 능력에 맞게 운동을 할 수 있는 프로그램을 개발하는데 목적이 있는 연구이다.

• Journal of the Korean Orthopaedic Association
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• v.54 no.4
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• pp.302-308
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• 2019

A painful shoulder is common among athletes, particularly those involved in overhead throwing. Professional and recreational athletes in throwing activities have an increased risk of partial thickness tears of the rotator cuff. The manuscript was to reviews the literature on the characteristics of injury, treatment strategies, and their results in throwing athletes.

• Journal of Conservation Science
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• v.32 no.2
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• pp.203-213
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• 2016

Conservation treatment of modern cultural heritage rickshaw from National Museum of Korean Contemporary History were carried out. The Rickshaw is divided into three parts which are chair part, sun-block cover part, wheels part. Treatment was referred to analysis results of P-XRF, species identification, FT-IR and microscope observation on Rickshaw. Outer films of rickshaw were chipped off. Therefore, conservation and restoration treatment were carried out in the damaged area. Degradation in armrest, saddle and backside of chair may cause serious problem. Therefore, the reinforcement were carried out with similar materials. Dry and wet cleaning were performed in sun-block cover to remove white stain and corrosion contaminant. Furthermore, reinforcement and restoration were performed in damaged area. Rickshaw from National Museum of Korean Contemporary History was made with various materials. This research result expects to be a great example of conservation treatment for modern cultural heritage which is made of various materials and to be used as useful data for conservation and restoration in modern cultural heritage.

• Proceedings of the KIEE Conference
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• 2006.10a
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• pp.184-185
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• 2006

환경오염 등으로 최근 자주 발생하는 국지성 집중호우로 인해 건물 중에서 지하 변전실은 가장 먼저 침수가 발생하게 된다. 따라서 본 논문은 지하에 시설된 전기 설비 중 몰드 변압기의 표면이 수분과 같은 불순물에 의해 오염될 경우 절연물에 미치는 영향과 위험성을 알아보기 위한 것으로 건조 시와 수용액 분무 후에 대한 연면손상에 대해 연구하였다. 실험 장치는 고전압 발생장치, 전극, 촬영장치 등으로 구성되었으며, 실험 결과 불꽃의 형상은 건조 시에는 가늘고 강한 빛으로 거의 직선적이고, 수용액 분 후는 산발적으로 광범위하게 나타난다. 방전에 의한 연면손상 특성을 보면 건조 시와 수용액 분무 후 모두 전극 간격이 증가할수록 탄화의 흔적이나 손상의 정도가 감소함을 알 수 있었으며 전반적으로 수용액 분무 후는 건조 시 보다 탄화 및 손상의 정도가 낮은 반면 부위는 광범위한 것으로 나타났다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2017.05a
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• pp.1165-1168
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• 2017

This paper suggests a fault diagnosis of damage on inner liner of regeneratively-cooled combustion chamber during gas generator cycle rocket engine hot firing test. This method focuses on a phenomenon that fuel flow rate difference between two flow estimate methods changes under an inner liner damage of combustion chamber causing fuel leakage and it is expected that it contributes to detect a damage on the combustion chamber in early stage and prevent further destruction during the hot firing test.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.39 no.1
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• pp.105-109
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• 2015

This paper presents the results of an experimental analysis of the high-power laser (HPL)-induced damage to a complementary metal-oxide semiconductor (CMOS) image sensor. Although the laser-induced damages to metallic materials have been sufficiently investigated, the damages to electric-optic imaging systems, which are very sensitive to HPLs, have not been studied in detail. In this study, we experimentally analyzed the HPL-induced damages to a CMOS image sensor. A near-infrared continuous-wave (CW) fiber laser was used as the laser source. The influences of the irradiance and irradiation time on the permanent damages to a CMOS image sensor, such as the color error and breakdown, were investigated. The experimental results showed that the color error occurred first, and then the breakdown occurred with an increase in the irradiance and irradiation time. In particular, these damages were more affected by the irradiance than the irradiation time.