• Journal of Yeungnam Medical Science
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• v.10 no.1
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• pp.144-156
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• 1993

This study was performed to investigate the effect of octreotide on the contractility of rat vas deferens. The smooth muscle strips isolated from the prostatic portion were myographied in isolated organ bath, Electric field stimulation (monophasic square wave, duration: 1 mSec, voltage : 50 V, frequency : 5 Hz or 30 Hz, train: 10 Sec) produced reproducible contraction. The contraction was composed of two component, first phasic component (FPC) and second tonic component (STC). These contractions were abolished by tetrodotoxin ($1{\mu}M$). Octreotide inhibited the field stimulation induced contractions both FPC and STC concentration-dependently. The FPC was decreased by a desentization of purinergic receptor by pretreatment of mATP, and the STC was decreased by pretreatment of reserpine(3 mg/kg, IP) 24 hours before experiments. Octreotide reduced the field stimulation induced contraction in the presence of mATP and of reserpinized muscle strips. The inhibitory effect of octreotide was more potent at 5 Hz than at 30 Hz. Octreotide did not affect basal ton and exogenous norepinephrine- or ATP-induced contraction. These results suggest that octreotide inhibit the contractility of the isolated rat vas deferens by inhibition of the release of neurotransmitters, both ATP and norepinephrine from adrenergic nerve terminal.

• Journal of Chest Surgery
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• v.32 no.2
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• pp.171-174
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• 1999

Background: Hyperhidrosis of the palms, axillae and face has a strong negative impact on social and professional life. The present existing non-operative therapeutic options seldom give sufficient relief and have a transient effect. A definitive cure can be obtained by upper thoracic sympathectomy. However, this is offset by the occurrence of a high rate of side effects, such as embarrassing compensatory sweating. Material and Method: From Sep. 1997 to Feb. 1998, 89 cases of the needle(2 mm) thoracoscopic thoracic sympathicotomy were performed. The second thoracic ganglion was resected by cutting with a endoscissors. Result: A bilateral procedure takes less than 25 min and requires just one night in hospital. There have been no mortality or life-threatening complications. One patient(<2%) required intercostal drainage because of pneumothorax. Primary failure occurred in one cases(<2%) and recurrent hyperhidrosis occurred in no cases. The patients with failure was successfully re-sympathicotomy. At the end of postoperative follow-up(median 3 months), 96.6% of the patients were satisfied. Compensatory sweating occurred in 57 cases(64.0%) with fourteen of those cases classified as either embarrassing in 10 cases(11.2%) or disabling in 4 cases(4.5%). Conclusion: Endoscopic transthoracic sympathicotomy is an efficient, safe and minimally invasive surgical method for the treatment of palmar and craniofacial hyperhidrosis.

• Science of Emotion and Sensibility
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• v.16 no.4
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• pp.509-516
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• 2013

As the visual fatigue induced by 3D visual stimulation has raised some safety concerns in the industry, this study aims to quantify the visual fatigue through the means of measuring the facial temperature changes. Facial temperature was measured for one minute before and after watching a visual stimulus. Whether the visual fatigue has occurred was measured through subjective evaluations and high cognitive tasks. The difference in the changes that occurred after watching a 2D stimulus and a 3D stimulus was computed in order to associate the facial temperature changes and the visual fatigue induced by watching 3D contents. The results showed significant differences in the subjective evaluations and in the high cognitive tasks. Also, the ERP latency increased after watching 3D stimuli. There were significant differences in the maximum value of the temperature at the forehead and at the tip of the nose. A previous study showed that 3D visual fatigue activates the sympathetic nervous system. Activation of the sympathetic nervous system is known to increase the heart rate as well as the blood flow into the face through the carotid arteries system. When watching 2D or 3D stimuli, the sympathetic nervous system activation dictates the blood flow, which then influences the facial temperature. This study is meaningful in that it is one of the first investigations that looks into the possibility to measure 3D visual fatigue with thermal images.

• The Korean Journal of Pharmacology
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• v.23 no.2
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• pp.87-94
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• 1987

The role of central adrenergic activity in the genesis of stress ulcers was investigated by intracerebroventricular (i.c.v.) administration of catecholamines and clonidine in pylorus-ligated rats restrained for 4 hours at a temperature of $4^{\circ}C$. 1. The stress-induced ulceration was markedly decreased by the i.c.v. administration of norepinephrine, epinephrine, dopamine or low dose of clonidine. 2. After an i.c.v. administration of norepinephrine or epinephrine, the volume of gastric juice, and both acid and pepsin secretion were markedly decreased. 3. Dopamine or a low dose of clonidne decreased the volume of gastric juice and acid secretion but did not affect pepsin secretion. 4. Isoproterenol caused a decrease in the volume of gastric juice and acid secretion, however, the ulcerogenesis was similar to that of the control. 5. Gastric function as well as ulcerogenesis was little affected by a high dose of clonidine. From the above results, it is suggested that central adrenergic activation inhibits cold-restraint induced ulcerogenesis via adrenergic alpha and dopaminergic receptors, and that this effect may be mediated by a decrease in gastric acid secretion. It is also suggested that other factors may be involved in this antiulcerogenic effect.

• Knowledge Management Research
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• v.22 no.1
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• pp.39-56
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• 2021

In the current knowledge society, mobile devices have become a useful tool for performing work. In the context of COVID-19 which has made digital transformation inevitable, the importance of mobile work behaviors - performing work tasks through mobile devices - is further highlighted. Drawing from the behavioral immune system theory and cognitive appraisal theory of emotions, this study proposes that individual workers' concern about getting infected by COVID-19 will be negatively related to job satisfaction but positively related to mobile work behaviors. We further propose that leaders' communality and agency trait will be positively related to both job satisfaction and the increase of mobile work behaviors. Analyses of a matched dataset comprising survey data and mobile application usage data from 407 workers showed that their leaders' agency and communality were significantly related to the workers' job satisfaction. However, their mobile productivity was significantly related only to the communality of their leaders. The results of this study will provide useful theoretical and practical implications for researchers and managers who aim to understand and promote the technology adoption and knowledge productivity of workers in a pandemic situation.

• Journal of Korea Entertainment Industry Association
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• v.14 no.5
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• pp.27-35
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• 2020

In 2020, one after another, musicians started to hold non-contact online concerts as the pop music industry began to shrink due to the unprecedented "Covid-19" incident, in seeking for various channels and alternatives. Taking this into account, this study conducted a survey with BTS' "Bang Bang Con The Live" as the subject that was held June 2020 to see if they were qualified as an alternative format for quarantine-focused non-contact concerts. The survey was carried out with the content analysis of online concert videos participated by music experts and by collecting evaluations and alternative suggestions from the audiences. The study showed that the sample performance video well fulfilled the actual feels of offline concert elements (field visualization, face-to-face interaction, and responsive behavior), satisfaction, and convenience as an alternative concert format as an emergency correspondence. However, it was analyzed that there was a serious lack of empathy and realism with fans. Therefore, the study showed the possibility that BTS' "Bangbangcon The Live" will function as an alternative format for non-contact concerts, but suggests that measures such as supplementing digital communication systems and technology devices must be taken to be recognized as a level of settlement in the global music community as well as in Korea.

• Journal for History of Mathematics
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• v.33 no.4
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• pp.181-222
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• 2020

《Xiangming Suanfa》 is a mathematics text published in 1373. The preface and postscript of the block books 《Xiangming Suanfa》 in the Joseon Dynasty were published as they had been in the original text from China. It can be considered to be based on 《Xiangming Suanfa》 was published in Mingjingtang. The five different block books which is published in Korea, possessed in Yonsei University Library, Sanghuh Memorial Library of Konkuk University and the National Library of Korea, were compared. Through recension-correction of the text, this thesis is intended to help researchers in utilizing the research by providing fine print.

• The Korean Journal of Pain
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• v.3 no.2
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• pp.101-107
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• 1990

• Proceedings of the Korea Multimedia Society Conference
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• 2012.05a
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• pp.236-237
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• 2012

최근, 현대인들은 자동차의 성능과 기능을 뛰어넘어 좀 더 감성적이고, 정서적 만족감을 제공하는 제품을 기대하고, 원하고 있다. 감성 Information & Communication Technology(ICT)는 정보 통신 기술을 기반으로 인간의 감성을 자동 인지하고, 사용자의 감성과 상황 정보를 처리하여 상황에 맞게 적용하는 기술을 말한다. 향후 감성 ICT 기술은 인간의 감성을 인지하여 사용자와 기기가 서로 교감하는 형태인 감성 맞춤형 서비스로 발전될 전망이다. 본 논문에서는 자동차 감성 ICT의 기술 동향을 분석하고 향후 방향성을 모색하고자 한다.

• Digital Contents
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• no.10 s.161
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• pp.94-97
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• 2006

갑자기 용이 인간들 앞에 모습을 드러낸다. 자고로 용이란 인간 세상에 함부로 나오면 안되는데 세상이 어지럽다보니 별일 다 생긴다며 모두들 불안해한다. 이 와중에 열일곱 살 청소년 아렌 왕자가 난데없이 제 아비를 찔러 죽이고 검 하나를 훔쳐 도망친다. 그러다 그는 사막 한가운데서 마법사 하이타카를 만나 교감을 나눈 후 둘이 길동무가 된다. 이후 당도한 마을 호트타운에서 위험에 처한 소녀 테루를 구해주기도 한다. 그러나 왕자의 모험은 머지않아 왕자의 위험으로 귀결된다. 거미라 불리는 마법사가 불로장생의 사리사욕을 채우고자 아렌과 하이타카를 잡으려 애쓰는 탓이다. 마침내 선과 악의 피할 수 없는 한판 승부가 벌어지고 용과 인간과 마법사가 공존하는 환상의 세계 어스시가 절체절명의 위험에 처한다.