• 한국가스학회:학술대회논문집
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• 1997.09a
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• pp.39-44
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• 1997

한국가스공사에서 건설중이거나 관리중인 천연가스 주배관의 길이는 날로 크게 증가하고 있다. 이배관의 건전성확보를 위한 배관 재료물성 및 용접부위 특성 평가를 다양하게 실시하였다. 그 결과 현재 사용중인 배관은 모재와 각종 용접공정에 의한 용접부위의 기계적 특성이 각종 규격에서 제시하고 있는 권고치를 초과하는 높은 안전성을 보이고 있으며, 금속 조직 및 강도학적인 측면에서 충분한 건전성을 확보하고 있음을 알 수 있었다.

• Proceedings of the Korean Reliability Society Conference
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• 2004.07a
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• pp.155-160
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• 2004

디지털 제품의 기능 다양화 및 복잡화에 따라 제품 개발 주기 내 소프트웨어 개발 및 테스트 조직의 업무 중 30∼40% 이상이 소프트웨어 테스트 업무에 집중하고 있다. 급변하는 소비자 요구사양에 대응하기 위해서는 신제품 개발 주기가 짧아지면서 개발 모델 수와 테스트 항목이 지속적으로 증가하고 있기 때문에 소프트웨어 기본 기능 및 UI (User Interface) 검증에 대한 자동화의 필요성이 대두 되었다. 본 논문에서는 휴대폰, DVDP, PDA에 대한 System Integration 작업을 통해 입출력을 정의하고 Black-Box testing을 구현하여 평균 64%이상의 자동화 율과 기본 Test Spec. 대비 80% 이상의 Test coverage를 확보했으며 많은 장단점을 도출할 수 있었다.

• Journal of Service Research and Studies
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• v.9 no.1
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• pp.17-31
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• 2019

This study empirically analyzed the effect of service nature of dental clinic on job satisfaction and job commitment. In recent years, the demand for medical services has been increasing in the dental clinics. As the dental clinics are faced with various competition situations through new establishment and expansion, the importance of job satisfaction and job involvement is more emphasized. The service nature of dental hospitals is known to be influenced by job satisfaction and job commitment. These two factors are important factors for securing the competitiveness of dental hospitals as well as the functions of hospitals required for survival and development of dental hospitals In this study, we analyzed the effects of labor - management relations and high-involvement work organization on the organizational satisfaction and organizational commitment affecting service nature of dental hospital. As a result of the analysis, it was found that the service nature based organization has a full mediating effect which is not established without labor relations and participatory work organization in the process of affecting job commitment. Therefore, unlike previous studies which focus on incentives or external rewards to increase job satisfaction of employees, this study concluded that internal support system reflecting service nature factors should be strengthened. Job satisfaction and job commitment, which are variables in this study, are expected to be the basis for improving competitiveness of dental hospitals. Future research should be extended to small and medium dental hospitals and dental clinics. It is also necessary to study various organizations in order to strengthen the competitiveness of the service organization by fostering the nature of service such as relationship and interactivity at the organizational level.

• Journal of Oral Medicine and Pain
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• v.33 no.2
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• pp.105-110
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• 2008

Baicalin is a flavonoid compound isolated from the medicinal plant Scutellaria baicalensis. It is known to affect multiple biological functions, including of antibacterial, anti-viral, anti-inflammatory and analgesic effects. Baicalin can inhibit nuclear factor-kappaB activation. It has been reported that some flavonoids possess the effects of bone metabolism. The present study was undertaken to determine the possible cellular mechanism of action of baicalin in osteoblasts. The effects on the osteoblast were determined by measuring cell proliferation, cell viability, alkaline phosphatase activity, and osteoprotegerin secretion. Baicalin has no effect on the osteoblastic cell proliferation and cell viability. Baicalin treatment showed increase in alkaline phosphatase activity and osteoprotegerin secretion of osteoblasts. Thus, baicalin may be a regulatory protein within the bone.

• The Korean Journal of Malacology
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• v.11 no.2
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• pp.123-134
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• 1995

한국산 산민달팽이 (Incilaria fruhstorferi)의 자성 생식기관을 조직화학적 방법을 이용, 광학현미경으로 관찰한 결과는 다음과 같다. 알부민선(albumen gland)은 대자웅동체관 위에 있으며, 산성 점액다당류와 중성 점액다당류 그리고 단백질성 분비물을 형성하는 세포들로 구성되어 있었다. 수정실(fertilization chamber)을 구성하는 내강 상피는 불규칙한 단층섬모원주상피와 위중층섬모원주상피세포가 3대 1의 비율로 구성되어 있으며, 결합조직에서 형성된 산성점액다다류성 과립들이 상피세포를 거쳐 내강 속으로 분비되었다. 또한 수정실의 외측표면은 기능은 알 수 없으나 산성 점액다당류를 분비하는 대형 세포들로 둘러싸여 있었다 . 수란관(oviduct)의 내강은 크로 작은 돌기로 인해 별모양을 나타내었다. 내강은 위중층원주상피세포로 구성되었으며 그들 사이에서 분비세포의 존재는 확인되지 않았다.질(vagina)의내강은 덮은 세포는 해면조직 형태의 세포와 단층섬모원주상피세포 그리고 위중층섬모원주상피세포 등 다양한 종류로 구성되어 있었으며, 잘 발달된 두터운 근육층은 질의 신축성을 높여 주었다. 정자낭(spermatheca)은 그 형태와 크기, 색깔 등이 종에 따라 다양하고, 질과 연결되는 자성생식기관으로 알려져 있다.

• The Korean Journal of Malacology
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• v.11 no.1
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• pp.78-91
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• 1995

한국산 산민달팽이(Incilaria frushtorferi)의 웅성생식기관 및 자웅공통생식기관에 대하여 조직화학적 방법을 이용하여 염색하고 광학현미경으로 관찰한 결과 다음과 같은 결론을 얻었다.1. 자웅동체관은 가늘고 꾸불꾸불하고 긴 관으로 대부분 성숙한 정자로 가득차 있었다. 이 관의 내강상피는 단충섬모상피와 단층섬모원주상피 그리고 위중층 원주상패 등 다양한 세포로 구성되어 있었다.2. 대자웅동체관은 위로 소자웅동체관과 알부민성이 있으며, 그 밑으로는 수란관과 연결되어 있었다.이들의 내강상피는 불규칙한 단층섬모원주상피로 구성되어 있으며, 결합조직내 선세포로부터 형성된 산성 및 중성 점액성 과립들이 기막을 통과하여 내강 속으로 분비되었다.3. 전립선의 내강은 키 큰 단층원주섬모세포로 구성되었으며, 결합조직 내의 분비과립세포에서 형성된 중성 점액과립을 상피세포를 통해 내강으로 분비하였다.4. 정관은 직경 0.5 x 0.25mm 정도인 타원형의 관상구조로 이루어져 있고, 이 관을 0.1mm정도의 매우 두터운 근육층이 둘러싸고 있었다.5. 수정관의 내강은 결합조직성 돌기에 의해 4부분으로 분지되어 있으며 내강은 키 큰 단층섬모원주상피세포로 구성되어 있었다. 또한 수정관 주위에는 두터운 환상근층이 둘러싸고 있었는데, 이들 사이에서 2종의 분비성 과립이 확인되었다.6. 상음경은 내강이 십자로 열려있으며, 키 큰 단층섬모원주상피와 단층입방상피세포로 구성되어 있었다. 내강을 구성하는 근육들은 매우 두터웁고 환상근층과 종주근층이 교대로 둘러싸고 있었다.7. 음겨은 상음경이 점점 굵어져서 형성된 큰 형성된 큰 생식기관으로 내강은 주름 형태인 많은 돌기들을 가지고 있었다. 내강상피 세포는 키가 단층원주상피세포와 단층입방상피가 부위에 따라 다르게 분포하고 있으며, 상피세포 및 결합조직에는 두터운 근육층이 있어 음경의강한 운동성이 감지 되었다.

• Journal of Biomedical Engineering Research
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• v.10 no.2
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• pp.117-124
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• 1989

The intelligent trajectory control method that controls moving direction and average velocity for a prosthetic arm is proposed by pattern recognition and force estimations using EMG signals. Also, we propose the real time trajectory planning method which generates continuous accelleration paths using 3 stage linear filters to minimize the impact to human body induced by arm motions and to reduce the muscle fatigue. We use combination of MLP and fuzzy filter for pattern recognition to estimate the direction of a muscle and Hogan`s method for the force estimation. EMG signals are acquired by using a amputation simulator and 2 dimensional joystick motion. The simulation results of proposed prosthetic arm control system using the EMf signals show that the arm is effectively followed the desired trajectory depended on estimated force and direction of muscle movements.

• The Korean Journal of Nuclear Medicine
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• v.32 no.1
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• pp.89-98
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• 1998

The search for tumor-avid agents for use in nuclear medicine imaging is an ongoing field of importance. The purpose of this study was to determine the affinity for radio labeled vitamin $B_{12}$ by a wide histologic variety of tumor types in mice. Seventeen different types of tumor were grown subcutaneously in female Balb/C or Balb nu/nu(nude) mice. When the tumors reached about 1 cm in diameter, mice were injected intraperitoneally with $^{57}Co$-vitamin $B_{12}$. Twenty-four hours later, the mice were sacrificed. Organs and tissues were removed, weighed, and activity per mg determined by gamma counter. Values represented cpm/mg tissue that was normalized to 20 grams body weight for each mouse. A wide variety of tumor types showed significant uptake and concentration of $^{57}Co$-vitamin $B_{12}$, as evidenced by tumor:tissue activity ratios. For many tissues of great importance in terms of background(bone, muscle, blood), the tumor:tissue activity ratios of uptake were high. These data strongly suggest that further efforts to evaluate the utility of radio labeled adducts of vitamin $B_{12}$ for clinical use in oncologic imaging are warranted.

• Journal of the korean academy of Pediatric Dentistry
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• v.33 no.1
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• pp.109-115
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• 2006

The calcifying odontogenic cyst (COC) predominantly affected Maxillary anterior segment and it is developmental cyst. But COC showed diverse terminology or classification, clinicopathologic features as well as its biologic behavior COC usually presents as slowly enlarging but otherwise symptomless swelling. Association with impacted teeth and odontoma is described in $24{\sim}30%$. The epithelial lining of COC(ghost cell) appears to have ability to induce the formation of dental tissues in the asjcents connective tissue wall. This case is a COC associated with a odontoma involving an impacted left maxillary canine in 14-year-old female child. Radiographic examination revealed a well-demarcated radiolucent lesion partially occupied by a radiopaque mass, involving the left canine. The histologic sections showed cystic cavity lined with ameloblastic epithelium containing ghost cell masses with regular and irregular shape odontoma. The final pathologic diagnosis was calcifying odontogenic cyst with odontoma(Type IB by Preatorius). Enucleation and elimination of the included tooth were performed. Now endodontic treatment was preformed on the 1st premolar of the upper left jaw, which had a lesion. And the patient and their parents want to have the orthodontic treatment performed and would like to keep the space maintainer.

• Journal of Digital Convergence
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• v.20 no.3
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• pp.9-18
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• 2022

Organizational performance is directly associated with leaders' behavior and the importance of various leadership types are continuously emphasized. Various of leadership types are possessed of different roles and influences. Nowadays, Chinese organizations continue to reinforce social responsibility and demand ethical elements for continuous development of organization and performance improvement. It shows that the importance of ethical leadership is emphasized among Chinese organizations. Based on this phenomenon, this research focused on identifying the role of ethical leadership and verifying the level of performance. According to the current situation that requires innovation in relation to performance, we focused on the employees' innovative behavior. Furthermore, we also verified serial multiple mediating effects of trust in leader and voice behavior on the relationship between ethical leadership and innovative behavior. This research focused on 336 employees in Chinese small and medium-sized enterprises to conducted a survey and the data were used in empirical analysis. The results showed ethical leadership had a positive influence on innovative behavior. In additon, the serial multiple mediating effects of trust in leader and voice behavior were verified. Overall, this research focused on exploring performance that can be achieved through ethical leadership and finding the ways to improve performance. Finally, the future research related to ethical leadership and performance was presented.