TV 수신 장해개선에 관한 연구

이수흠,류상욱 慶南大學校 附設 工業技術硏究所 1992 硏究論文集 Vol.10 No.-

TV 화상의 ghost 제거는 현재까지 시행착오적인 방법에 의한 안테나 조정에 의존하여 왔다. 본 연구에서는 이런 점에 착안하여 TV 수신에서의 방해파 위상을 π/2 지연시킨 신호를 합성하는 방법에 의해 이를 제거할 수 있음을 보이고, 실험을 통하여 16㏈ 정도의 방해파 제거효과를 확인함으로써 그 효용성을 입증하였다. It could suppress the undesired signals by adjust the amplitude and phase shift with π/2 of the mixed field intensity that received by the combined system with two antenna which were installed in the constant distance to cancel an undesired signals. The characteristics of the system which were designed by the author were showed that it was cancelled the undesired signal about 16㏈ than the conventional antenna.

일개 중소도시에서 PC방을 이용하는 중·고등학생의 인터넷중독과 VDT증후군

박성은,이동욱,이인구,배재익,성낙진,박기흠 대한보건협회 2003 대한보건연구 Vol.29 No.1

Background : It is one of the important daily activities for Korean students to use the Internet, and most of them go to FC bang. However, students uncontrolled Internet use causes compulsive Internet use, so called the Internet addiction. So we investigated the relationship between students internet use pattern and their Internet addiction. And also examined how internet addiction causes VDT syndrome. Method: We conducted survey with self-registered questionnaires for 1 months, from January to February 2000. On the questionnaire, we asked Internet use pattern to students in suburban area. To test the Internet addiction, this research adopted Dr. Young s Internet addiction self test, and also major 8 symptoms of VDT syndrome were tested. Results : There was not much difference in computer using time between at home and at PC bang, and among student s grade. We found 30.1% of the objects addicted to the internet, however, there was no relationship between Internet addiction and student s grade. We found statistically significant relationship between Internet addiction and VDT syndrome (p<O.o5) except ocular symptoms and dry mouth. Conclusion : As a result, we found that Internet adhction is related with the spending time on computer use, although there is no relationship between Internet addiction and student s grade. There are significant correlations between internet addiction and VDT syndrome. So internet addiction is not only social and psychiatric problem but a physiologic dsorder whch affect student s health.

인터넷-PSTN 연동 게이트웨이 신호 프로토콜 검증

유상신,이순흠 순천향대학교 부설 산업기술연구소 1999 순천향 산업기술연구소논문집 Vol.5 No.1

In this paper, we study on the interoperability between the traditional telephone, connected to the circuit-switched networks, and the internet phone, connected to the Internet, respectively. Especially, we focus on the necessity and possibility of interoperability, and furthermore derives the necessary requirements of interoperability. For this purpose, we analyze both ISDN and Internet signalling system, that are closely related with the interworking. We also investigate the basic call processing parts of each system using the state transition diagrams and the signalling procedures. Then, we model the signalling protocol for gateway systems using the Petri-Net model. Through reachability trees of the Petri-Net model, we confirm that interoperability is possible, and that characteristics of deadlock, liveness, and boundness are satisfied. Finally, we describe the design of interworking function that converts the differences of two signalling systems.

삼차원적 안모형태의 미적분석

이상한,권대근,백상흠 경북대학교 병원 2002 경북대학교병원의학연구소논문집 Vol.6 No.1

This study was preformed to investigate the average anthropometric value of normal Korean men and women and to compare the preceding literatures.Additionally,average Korean profilogram was made to serve as a template for diagnosis of facial form. Eighty five Korean subjects(41 men 44 women)aged between 21 to 26 were selected by members of the author's department on the basis of intact dentition and ClassⅠocclusion without facial asymmetry.Frontal and lateral photographs were taken under standardized conition with digital camera.The image was magnified and according to the FH plane of cephalometric radiograps and digitized using personal compture. To compare the Western beauty,25 estherically pleasing famale was selected to measure various angle distance of the face. 1. It was possible to calculate the mean coordinate value of Korean normal samples which enables the direct visualization and comparsion with the use of template. The method in this study was easy to applicate under the Microsoft Windows bases. 2. Maxillary vertical hypoplasia, upper and lower lip protrusion was characteristics of Korean norms and relatively narrow alar base distance,less conspicuous nasal projection was observed.As the vermilion exposure and upper lip length was more than western norm,chin looks shorter than western. To compare the Korean and Weastern estherically pleasing profile,facial convexity and nose was less conpicuous in Korean womem.

전국체육고등학교 투척선수들의 운동 상해에 관한 연구

배성완,강주혁,문주흠 목포대학교 스포츠산업 연구소 2006 스포츠 산업연구소 논문집 Vol.5 No.-

The purpose of this research is to work out the injury time, injury place, injury part, cause of injury, medical treatment, preventions against weight throwers at national physical education high schools and management and protection of them and advance of competence. As a result of questioning total 148 persons of shot putters (M20, F17), discus throwers(M21, F20), javelin throwers(M22, F20) and hammer throwers(M18, F10) who are registered at the Korean Amateur Athletic Federation, we come to the following conclusions. 1. As a result of comparison and analysis of the training programme where weight throwers were frequently injured by the event, the meaningful difference was obtained. Javelin throwers were injured most frequently while throwing training. 2. As a result of comparison and analysis of the meaningful difference of part which injury happened most frequently while throwers trained usually, the meaningful difference was obtained. Javelin throwers’ elbow injury was very frequent. 3. As a result of comparison and analysis of most frequently injured part by the event while weight throwing, the meaningful difference was obtained. Discus throwers’ waists were mostly injured while throwing. 4. As a result of comparison and analysis of frequently injured part by the event while weigh throwing training, the meaningful difference was obtained. Injury in waist part happened more frequently in rotary motion event than rectilineal motion event while weight throwing. 5. As a result of comparison and analysis of the event that throwers were injured frequently by sex while weight training, the meaningful difference was obtained. Women weight throwers were injured while jump squat training. 6. As a result of comparison and analysis of treatment period after injury by sex, the meaningful difference was obtained. It took women 4 weeks more to cure up and it was not short. 7. That difference that keep in mind method that can protect Shanghai when saw as exercise injury experience according to comparative analysis result by item appeared and rectilineal movement item selected most by method that mental power can protect Shanghai both item beam egg number It Eotda. 8. As a result of comparison and analysis of the season when thrower were injured frequently by experience, the meaningful difference was obtained. Throwers with below 1-4 year experience were injured frequently in summer. 9. As a result of comparison and analysis of the training time when weight throwers were injured frequently by result, the meaningful difference was obtained. Weight throwers who have never won the prize were injured frequently while training in the afternoon. 10. As a result of comparison and analysis of throwing motion when weight throwers were injured frequently by experience while throwing training, the meaningful difference was obtained. Throwers with below 1-4 year experience were injured frequently on waist twisting motion in the finish motion.

연신온도가 폴리에틸렌 테레프탈레이트 필라멘트사의 인장특성에 미치는 영향

박연흠,원성연 成均館大學校 科學技術硏究所 1990 論文集 Vol.41 No.2

The tensile properties of poly(ethylene terephthalate) filament yarn have been investigated by varying the drawing temperature under the constant draw ratio of 3.0. The breaking strength and elongation increases with the drawing temperature upto 85℃, but above 85℃ they decrease with the drawing temperature. The yield stress and yield strain have also shown the similar trends. The density increases with the drawing temperature upto 85℃, but above 85℃ the density of 1.38g/㎤ has been maintained. Thus it is suggested that the optimum drawing temperature of poly(ethylene terephthalate) filament yarn is around 85℃ under the draw ratio of 3.0.

Linear Accelerator를 이용한 Stereotactic Radiosurgery

정상섭,윤도흠,오성훈,김선호,서창옥,추성실,노준규,김동익,서정호 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.6

A Modified irradiation technique utilizing a linear accelerator for radiation surgery within the brain was performed in 4 patients. Three of them had brain tumors and one small arteriovenous malformation in midbrain. A Hitchcock stereotactic apparatus and a 10 MeV linear accelerator have been adapted and special computer programs for dosimetry were obtained and studied experimentally with a phantom model. Stereotactic radiosurgery is a valuable tool in the treatment of inoperable, deep seated intracranial lesions, the major advantage being high efficacy and smoothness of the procedure, as well as short hospitalization times.

파킨슨씨병 환자에 있어서 자가부신수질 이식술

정상섭,박상근,오성훈,김선호,윤도흠,박정수,양우익,최인준,안영수,김경환,박창일,김진수,이현철 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.6

Recent experimental studies and clinical cases have suggested that grafting tissue from the adrenal medulla into the brain may alleviate the symptoms of Parkinson's disease. Autologous adrenal medullary grafts into the striatum was performed stereotactically in two patients with Parkinson's disease. Both patients were bedridden preoperatively, but 4 months after the surgery both became ambulatory and one was even capable of returning to his job. Even though the number of cases was small⑵ and the follow-up period was short, this study shows that adrenal medullary transplantation into the striatum may have some beneficial effects in patient with Parkinson's disease. Further experimental and clinical trials are necessary to see whether this procedure will be a recommendable surgical treatment for patients suffering from Parkinson's disease.

전도성 Nylon 6/Polypyrrole복합체의 제조 및 그 전기적 성질

박연흠,박학수,남성우,안동문 成均館大學校 科學技術硏究所 1992 論文集 Vol.42 No.2

Electrically conducting nylon 6/polypyrrole composite films and fabrics have been prepared by polymerizing pyrrole vapor in nylon 6 matrix containing cupric chloride as an oxidizing agent. After polymerization of pyrrole for 30 min, the conductivities of composites reach as high as 10^-3∼10^-2 S/cm depending on the content of oxidizing agent. The stability of conductivity to ambient air exposure is excellent ; there occurs little change in conductivity on exposing the composites to ambient air for one month. The nylon 6 composite fabrics containing 14∼25 wt.% of polypyrrole show an excellent antistatic properties.

참전복 배합사료에 맥주효모의 첨가 효과

박흠기,김동주,이상민 강릉대학교 동해안지역연구소 1999 東海岸硏究 Vol.10 No.2

A 20-week growth trial was conducted to investigate the utilization of brewer's yeast as an additive in formulated diets on growth and body composition of juvenile abalone (Haliotis discus hannai). Four replicate groups of the abalone averaging 63 mg were fed the formulated diets containing 0% and 3% brewer's yeast. In addition, these formulated diets were compared with natural food (dried Laminaria). Survival rate, growth performance and proximate analysis of abalone fed the diet containing brewer's yeast were not significantly different to control diet (P>0.05). These values of abalone fed the formulated diets were higher than those of abalone fed the dried Laminaria (P<0.05). These data indicate that supplemental brewer's yeast is not needed in this formulation and dried Laminaria is not adequate diet for juvenile abalone.