컨테이너 검색기 이송대차 추진용 선형 유도전동기의 2차측 리액션플레이트 재질에 따른 특성 연구

정재훈(Jae-Hoon Jeong),최장영(Jang-Young Choi),성소영(So-Young Sung),박종원(Jong-Won Park),임재원(Jaewon Lim) 대한전기학회 2016 전기학회논문지 Vol.65 No.1

This paper presents the analysis of the analysis of thrust characteristics of linear induction motors(LIMs) according to secondary reaction plate. LIMs are well known as high speed transport systems, which can obtain thrust directly without gears and links, or auxiliary mechanisms. A simple structure, easy maintenance, and less environmental pollution are advantages of LIMs. In transport systems using LIMs, the secondary reaction plate is an important design factor, because it has considerable impact on the cost of the railway as well as the performance of the LIMs. This paper deals analyzed the characteristics of linear induction motor used for moving the vehicle of container scanner. Thrust, efficiency and load characteristic were interpreted with FEM regarding two models whose material of secondary reaction plate was copper and aluminum. It suggested the interpretation of thrust, efficiency and power factor characteristic along slip and compared the operation ability of linear induction motor through characteristics analysis along the load.

녹차 및 결명자 추출물의 교정용 브라켓과 치면 사이의 경계부에서 분리된 mutans streptococci에 대한 항균작용

임성훈,서정순,윤영주,김광원,유소영,김화숙,국중기,이병래,차종희,박재윤 대한치과교정학회 2003 대한치과교정학회지 Vol.33 No.5

본 연구는 치아우식증에 관련된 Mutans streptococci 표준균주 및 임상분리 균주의 성장억제를 유도할 수 있는 천연 생약추출물을 검색하기 위하여 실시되었다. 녹차추출물은 CHMC-2032를 사용하였으며, 결명자 추출물은 50% 에탄올을 이용하여 얻었다. 이들 추출물의 Mutans streptococci 표준균주 및 교정환자들에서 브라켓과 치면 사이의 경계부에서 분리된 각각 10 균주씩의 S. mutans 및 S. sobrinus에 대한 최소성장억제농도를 액체배지 희석법으로 구하였다. 그 결과 CHMC-2032의 S. mutans 및 S. sobrinus의 표준 균주, S. sobrinus의 대부분 임상분리 균주에 대한 최소성장억제농도는 5 mg/ml이었다. 그러나 결명자 추출물에 의한 S. mutans 및 S. sobrinus에 대한 세균 성장억제 효과는 미미하였다. 본 연구 결과 치아우식증의 예방적 측면에서 결명자차보다는 녹차를 마시는 것이 유리하며, CHMC-2032를 이용하여 구강양치용액을 제조하여 사용할 경우 교정환자를 포함하여 대부분의 사람에게서 치아우식증 예방 효과가 있으리고 추정된다. Mutans streptococci is the major causative factor in dental caries. Especially, orthodontic patients with fixed appliance are a risk group for dental caries. Because fixed appliances attached on teeth may change the environment of dental plaque, the enamel decalcification or dental caries around the bracket and band is a major side effect of orthodontic treatment. The aim of this study was to search plant extracts that have antimicrobial effect on mutans streptococci. Seed-extract of Casio tora were prepared with ethanol and CHMC-2032, the leaf-extracts from Camellia sinensis extract, was obtained extract, 2 type strains and 20 clinical isolates of mutans streptococci isolated from the interface between orthodontic brackets and tooth surfaces in the orthodontic patients were used in this study. The minimal inhibitory concentration of CHMC-2032 was 5 mg/ml on the S. mutans KCTC 3065, S. sobrinus KCTC 3088, and 8 clinical isolates of S. sobrinus. However, there was no antibacterial effect of seed-extract of C. tora on mutans streptococci. These data suggest that green tea may be more effective than the tea prepared from C. tora in the prevention of enamel decalcification or dental caries around brackets.

지능형 정속주행 제어시스템 개발

임영도,설재훈,한창훈,김승철,박종오,이준탁,방석원 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1

This paper describes an intelligent cruise control system for automobile. With the remarkable numericalincrease of automobiles on the roal, the optimized traffic flow control using the cruise control is one of the very important traffic problems to overcome the limitation of an existing road capacity. Based onthis idea that minimize the fuel cost and teh air pollution, and accept a driver's needs for driving, we have developed an intelligent cruise control system for vehicle. This proposed intelligent fuzzy cruise controller was successfully implemented using the fuzzy algorithm, the i80c196 μ-controller board and the throttle valve actuator. The field test results on an linear road was introduced.

초전도 저장장치의 신경회로망 모형 및 이를 이용한 안정도해석 앨고리즘 개발에 관한 연구

林裁尹,張勝燦,金正勳,姜亨求 弘益大學校 科學技術硏究所 1997 科學技術硏究論文集 Vol.8 No.-

Recently the need of energy storage device such as the pumped-storage has more and more increased in power system in order to aid a side reliability. But it has the problem of environment. As an alternative way of installing it, the Superconducting Magnetic Energy Storage(SMES) is widely study in a power system. Generally the SMES might divide in two class ; the storage use and the stability use. For use in storage SMES never has been construct, because of its expensive cost. Actively progressing the field of the study is for use in stability SMES, so as construction cost is relatively inexpensive. In order to application of the SMES in the power system, it has to be proven of stability efficiency through stability analysis. Stability analysis need modelling of the SMES. The existing model has been used only mathematical model that presented by first order delay time function, so that the SMES has fast response characteristic. But this kind of mathematical model of dynamic system have some problems when stability analysis requests more precision analysis. The problems are the complexity of equation, long calculus time and error of model-decision. For the purpose of settling this problems, this paper proposed an artificial neural network(ANN) methodology to make SMES modelling. ANN is presented using the input-output power characteristics of SMES. when it uses ANN which functions as a model-free system, network construction and parameters determination are carefully chosen to represent the complicated nonlinear input-output relation from the black-boxed SMES system. So far medelling of SMES by ANN never used stability analysis. In this paper, the proposed ANN-based SMES model is applied to analyze the power system stability and the simulation results provide the property of this approach.

현대건축의 비움의 특성에 따른 공간구성방법에 관한 연구

임상도,이재훈 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(계획계)

The purpose of this study is to analyze the way of spatial composition through the spatial characteristics of a void in contemporary architecture. For showing the meaning of a void, this study explained the modern and contemporary meaning of it. The spatial feature of a void was divided into a configurational and a locational property, and the plannings and works of the contemporary architects which the concept of a void is applied since the middle of 1990 were analyzed. As the result, some elements which were composed by the spatial property were extracted and the ways that were composed by expanding to an architectural space were proposed. In conclusion, it could be known that a void was a mean to make not an exterior form but an inner & external character, making the link of an indoor space and outdoor space, forming the relation with a functioin through the way of a linear dynamic composition and a facial static composition.

일차 양측성 구순열의 일단계 재건에 대한 증례보고

임석균,이기혁,김영균,김수관,이병준,여환호,서재훈 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.3

Bilateral cleft lip reconstruction can be performed in one-or two-stages. The choice depends on the surgeon's proficiency and experience. However the type and severity of the cleft must be considered. Complete or incomplete symmetric, bilateral clefts in which the premaxilla is within the alveolar arch or slightly protruded can be successfully treated with simultaneous lip reconstruction on both sides. There are some advantages that one-stage lip reconstruction facilitates creation of a symmetric and balanced lip, retraction of protruding premaxilla and the parent's psychologic satisfaction. However, there are some disadvantages such as micrognathia of the upper jaw by severe scar formation and poor adaptation of flap margins by severe tension. The surgeon must be able to judge and exploit the advantages offered by one-stage approach. We present the case report of one-stage reconstruction of primary bilateral cleft lip with literature reviews.

지역사회에서 형성된 사회적 지지와 근로자의 사회심리적 스트레스간의 관련성

임화영,김형수,최영환,장성훈,이건세,정최경희,오원기,최재욱,정춘화 대한산업의학회 2006 대한직업환경의학회지 Vol.18 No.4

Objective: This study was performed to examine the relationship between community-based social support and psychosocial distress in workers. Methods: The study subjects were 596 workers recruited from 11 companies in Chungju city. A structured questionnaire was used to assess sociodemographics, health-related behaviors, job characteristics, job stress, work-based social support, community-based social support and level of psychosocial distress. Results: Hierarchical multiple regression analysis showed that workers with no chronic disease, exercise and sufficient sleep had a higher score of psychosocial distress than those with chronic disease, no exercise, and not enough sleep. Coworker's work-based social support and community-based social support were negatively associated with psychosocial distress. The R square value of total independent variables on psychosocial distress was 0.409, and that of community-based social support on psychosocial distress was 0.052. Conclusion: This study showed that community-based social support served as a protective factor against psychosocial distress in some workers. We recommend the establishment of a worksite stress reduction program in occupational level as well as community-based social support.

뇌경색을 후유증으로 남긴 뇌형 말라리아 1예

임영석,이준행,박동영,김범,백경란,김성민,권오정,송재훈 대한화학요법학회 1996 대한화학요법학회지 Vol.14 No.1

저자들은 53세 남자로서 파키스탄을 여행한 직후 열대열원충으로 인한 뇌형 말라리아가 발병되어 혼수에까지 이르렀고, 적절히 치료하였으나 뇌기저핵의 경색과 신경학적 휴우증을 남겼던 1례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. In recent years, the incidence of imported cases with falciparum malaria has been increasing in Korea due to marked increase in travel to malarious area without adequate prophylaxis. Cerebral malaria is and encephalophaty which can complicate some patients infected with Plasmodium falciparum leading to significant mortality. We report a case of 53 year-old male with cerebral malaria who was thought to be infected in Pakistan. Blood smear showed typical intra-erythrocytic ring form trophozoites and banana-shaped gametocytes of P. falciparum. The patient had been in comatose state for a week despite immediate treatment with meloquine. After improvement of his consciousness, however, aphasia and quadriparesis persisted and brain MRI showed subacute infarction of both basal ganglia (globus pallidus and putamen). To our knowledge, this is the first case of cerebral malaria complicated with cerebral infarct reported in Korea.

발레 그랑 쥬떼 동작의 운동학적 분석

심재희,임용규,우병훈 한국학교체육학회 2003 한국학교 체육학회지 Vol.13 No.2

본 연구의 목적은 발레에서 그랑 쥬떼(grand jete´) 동작을 3차원적 동작분석을 통하여 숙련자와 미숙련자 사이의 차이점을 운동학적인 변인으로 규명하는데 있으며, 또한 차이가 나타난 변인에 대한 원인을 분석하여 발레를 지도하는 데 있어서 과학적 자료를 제공하고자 한다. 연구결과에 기초하여 발레 그랑쥬떼 동작은 도약전에는 신체중심을 낮게 하고 오른쪽 발끝의 속도를 빠르게 하여 높은 신체중심으로 체공시간을 길게 하고 양다리를 최대로 신전하여 좌·우 대퇴각은 수직과 수평으로의 더 많은 공간과 힘을 이용하는 것이 효율적인 동작을 수행할 수 있는 결과로 사료된다. The purpose of this study is to analyze the movement of Grand Jete´ through the analysis of 3-dimensional movement, and to find out the difference between experts and the unskilled through kinematical cause. And the purpose is also to provide scientific source by analyzing the cause of its difference when teaching ballet. I come to the condusion below through the kinematical analysis in order to achieve this purpose of the study. 1. The time required means the time needed between each event. It takes the experts 0.361 second from E-3, which is from jumping to reaching the highest point, to E-4, which is a landing point, on the other hand, it takes the unskilled 0.252 second. It takes the longest time to stay in the air between E-3 and E-4. The total required time is 0.694 seconds in case of the experts, and 0.548seconds in case of the unskilled. Concerning the duration of staying in the air, the case of the former is longer than the one of the latter. There is the significant difference between the former and the latter (P<.05). 2. In case of experts, the displacement of the bodily center is 83.44±1.09% in E-3, and in case of the unskilled, 76.44±1.00%. Concerning the height of the bodily center, the case of the former is higher than the one of the latter. There is the significant difference between the former and the latter (P<.01). 3. The speed of the tiptoe to the right side is the top speed between E-3 and E4. The speed of experts in E-2 is 7.69±3.57m/s, and the one of the unskilled in E-2 is 9.51±0.99m/s. The speed of the former is remarkably reduced compared to the one of the latter. There is the significant difference between the former and the latter (P<.01). 4. In the case of the displacement in angle of the right and left ankle joints, temporary reduction of the angle of the experts right ankle in E-2 influences the vertical rise and the horizontal movement. There is the significant difference in E-4 (P<.05). 5. Concerning displacement in angle of the right and left coxae, the experts right coxa angle is 100.58±6.98°, and their left one is 108.92±3.58°. In case of the unskilled, the right coxa angle is 89.66±6.58°, and the left one is 130.33±5.49°. The unskilled need the power and flexibility of the femoral muscle of the left coxa. There is no significant difference between the former and the latter. Based on the result of the study, they should lower the bodily center before jumping and make the speed of the right tiptoe fast when they practice the movement of Grand Jete. And then using high bodily center, they have to prolong the time of staying in the air. Simultaneously, they should stretch both legs so that the right and left femoral ankle can use more space and power vertically and horizontally. Those series of movement can make them practice Grand Jete better.

중합효소연쇄반응법을 이용한 급성 치수 및 치근단 질환의 병원성 세균의 동정

김지훈,유소영,임선아,국중기,임상수,박슬희,황호길 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.2

The purpose of this study was to investigate the frequency of 7 putative pathogens in endodontic infections. The specimens were collected from infected pulpal tissue of patients who were referred for root canal treatment to the department of conservative dentisty, Chosun University. Samples were collected aseptically using a barbed broach and a paper point. The cut barbed broaches and paper points were transferred to an eppendorf tube containing 500 ml of 1 X PBS. DNAs were extracted from the samples by direct DNA extraction method using lysis buffer (0.5% EDTA, 1% Triton X-100). Identification of 7 putative pathogens was performed by PCR based on 16S rDNA. The target species were as follows: Porphyromonas endodontalis, Porphyromonas gingivalis, Prevotella intermedia, Prevotella nigrescens, Bacteroides forsythus, Actinobacillus actinomycetemcomitans, and Treponema denticola. Our data revealed that the prevalence of P.endodontalis was found in 88.6% (39 / 54), P.gingivalis 52.3% (23 / 44), P.nigrescens 18.2%(8 / 44), P.intermedia 15.9% (7 / 44), B.forsythus 18.2% (8 / 44), A.actinomycetemcomitans 2.3% (1 / 44), T.denticola 25% (11 / 44) of the samples. The high prevalence of P. endodontalis and P.gingivalis suggests that they may play an important role in the etiology of endodontic infections.