정신분열병 환자에서 얼굴 영상의 작동기억 장애 : 기능자기공명영상연구

이창욱,김태석,주라형,박주미,박여진,김종진,전신수,배치운,김정진,이수정,이철,백인호 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.2

Objectives : Impaired processing of facial information is one of the broad ranges of cognitive deficits seen in patients with Schi-zophrenia. We aimed to elucidate the differences in brain activities involved in the process of facial working memory between schizophrenic patients and healthy comparison subjects. Methods : Twelve patients with schizophrenia were recruited along with twelve demographically matched healthy volunteers as a comparison group. Functional magnetic resonance imaging (fMRI) was used to assess cortical activities during the Perfor-mance of a 2-back working memory paradigm using images of neutral faces as mnemonic content. Rcsults : The patient group performed the tasks with reduced accuracy. Group analysis revealed that the left fusiform gyrus, the right superior frontal gyrus, the bilateral middle frontal gyri/insula, the left middle temporal gyrus, the precuneus, the quadrangular lobules and the vermis of cerebellum showed decreased cortical activities in the patient group. On the other hand, an increased level of activation in the lateral prefrontal cortex and the pahetal lobule was observed from the patient group, all in the right hemisphere. Conulusion : A decreased level of activity in the left fusiform gyrus among the patient group implicates inefficient processing of facial information. An increased level of activation in prefrontal and parietal neural networks from the patient group confirms earlier findings on the impaired working memory of patients with schizophrenia.

선천성 완전방실차단이 동반된 신생아 루프스 1예

정재현,이은지,이은주,황진원,송영진,최병진,김일환,김종윤,허민영,김동욱 인제대학교 2009 仁濟醫學 Vol.30 No.-

Neonatal lupus is a rare syndrome occurring In neonates with tranplacentally acquired maternal autoantibodies, In particular anti-SSA/Ro-SSB/Ra antibodies. Manifestations include congenital heart block, cutaneous lesions, thrombocytopenia, neutropenia, pulmonary or neurological disease and hepatitis. The non-cardiac manifestations resolve by 6 months of age, congenital heart block is irreversible. We experienced a case of neonatal lupus with congenital complete heart block in a newborn of asyptomatic mother with anti-SSA/Ro-SSB/Ra antibodies.

李朝末期 民俗 舞踊의 체계적 定立

정진욱 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

A variety of folk dances in Choseon Dynasty have been reviewed, such as Whadong Dance, Monk Dance, Lion Dance, Watermelon Dance, Farmers Dance, Dondolrari Dance, and Dalrae Dance. The traditional folk dances of Korea have many kinds of special characteristics. Whadong Dance is a celebration of a good harvest and a joyful life. In whadong Dance, people share the delight. Monk Dance was generated by the influence of Buddhism. After a long inheritance of folk dances with the supreme traditional patterns, Lion Dance was established to show the high creative talent of civilian artists. Watermelon Dance has many sarcastic elements that reveal inabilities of authoritarian officials and their soldiers. It brought ridicule upon the officials and soldiers in a funny way. Farmers dance has been formed through a long historical process and it reflects many special features of local folklore. Dondolrari Dance and Dalrae Dance are the deep reflections of beautiful and joyful personality and simplicity of Choseon people. In conclusion, our folk dances that have been transmitted since late Choseon Dynasty, enshrine and reflect the life of Choseon Dynasty very well. The particular national sentiment and disposition of traditional Koreans are preserved in the motions of the folk dances.

MANET 라우팅 프로토콜 QoS 지원서비스의 성능평가에 관한 연구

鄭燦赫,金鉉郁,李光培,姜景仁,朴京培,劉忠烈,吳世德,裵振勝,趙榮泰 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

In this paper, we evaluated two main QoS supporting routing protocol on wireless ad hoc network. At presence, wireless mobile communication focuses on how to efficiently support mobility of users more than QoS guarantee. However, in order to satisfy requirement of various applications which have been or will be served, QoS support service between source and destination becoming a very important issue. Of all routing protocols, DSR and AODV are very important routing protocol in MANET. So we simulated DSR and AODV QoS Routing Protocol Through simulation evaluation tool NS(Network Simulation) based on various environments.

GMAHN 환경에 적응하는 에러 복구기능을 이용한 AODV 라우팅 프로토콜

정찬혁,오세덕,배진승,이기원,장양근,이광배,김현욱,유충렬,하재승 明知大學校 産業技術硏究所 2006 産業技術硏究所論文集 Vol.25 No.-

Mobile nodes in ad hoc mobile networks typically communicate over wireless channels and are capable of movement. These are networks that support multihop communication and can be formed on a temporary basis. This paper proposes a solution that allows mobile nodes to access the wired Internet and to roam from base station to base station. And we also develop the efficient method that adapts in Global MANET which can be changed over time. It is observed that we can reduce not only error detection time but also network load, thus increasing the data reception rate in Global MANET Environment.

이북지역의 巫俗文化 연구의 체계적 정립 : 황해도 철물굿이 중심으로

정진욱 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

The characteristics and ceremonial procedures of Cheolmul-nori Gut in Gangshin-mu of Whanghae Province, located on the northern part of the Han River, are examined and the conclusion as follows could be drawn: 1. Whanghae Province Guts are mostly made up of wild quick-tempo free-dances and the main elements consist of Do-mu and Hoeseon-mu. 2. On the other hand, there are also other slow dances. Geosang Dance starts with graceful melody and slow tempo. Samhyeon Dance is a joyful one. 3. Many dancing suits, symbolizing the gods with diverse and splendid colors, are used. 4. There are many ceremonial tools according to the procedures. The small tools are used to dance. 5. Some sorcery ostentation of the god's power and mental spirit can be found. 6. The contents of Gut incorporate much of the dramatic element. 7. There is an exchange of messages from the dead delivered by an exorcist.

스텝이송을 이용한 미세구멍가공

한진욱,이응숙,정윤교 國立 昌原大學校 産業技術硏究所 1995 産技硏論文集 Vol.9 No.-

Micro drilling is one of the most important machining types and its importance becomes more and more increased in the whole field of industry. Micro drilling, however, has few the case of practical application, because it requests high techniques; manufacturing micro drill, treating, chip, producing precise hole shape and progressing machining efficiency. Micro drilling has a technical problem; drill breakage from drill breakage from the lack of drill stiffness and the interruption of chip. It is, therefore, essential to select of proper cutting conditions and of step fed for the method solving the lack of stiffness and the interruption of chip. Especially, study on step feed is requested more than the present. The purpose of this paper is to investigate experimentally about cutting conditions which affect on tool life and round errors and to estimate about the efficiency of step feed.

EM알고리즘에 의한 다변량 혼합정규분포하의 분류방법

황강진,박정욱,유희경 三陟大學校 2000 論文集 Vol.33 No.1

Cluster analysis is a technique for unsuoervised classification which the group information is not available. General cluster analysis uses euclidean distance as a measure of group similarity. However, it might cause some problem such as ignoring the pattern of the groups which is characterized by the relationships between variables. Hence general clustering method can lead to misclassification problem. It is worth considering mixture distributions for the classification. That is each cluster or group has its own distribution and they are mixed together. The main purpose here is to find which group has the maximum probability for each observation to be classified. EM algorithm is a useful technique to find the maximum likelifood estimator from incomplete data. In this paper, we assume that each group follows multivariate normal distribution and consider that the given data are incomplete because there is not the group information. We introduce new variable which indicates the group information. Then the augmented data becomes complete data. EM algorithm is used to estimated conditional expection for group information variable from the complete likelifood function. The effect of EM algorithm is compared to k-means clustering by misclassification probability.

이동 애드 혹 네트워크에서의 환경적응형 QoS AODV 라우팅 프로토콜에 관한 연구

裵振勝,宋東勳,吳世德,鄭燦赫,金玄郁,李光培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

In this paper, we propose a bidirectional mobile Ad Hoc routing protocol based on AODV(ad-hoc on-demand distance vector routing) with QoS(quality of service) support. At presence, wireless mobile communication focuses on how to efficiently support mobility of users more than QoS guarantee. However, in order to satisfy requirement of various applications which have been or will be served, QoS guarantee between end points is a very important issue. The existing AODV routing protocol is implemented to use only BE (Best Effort) service. However, actual wireless mobile environment requires to reduce a waste of communication resources and meet with the real-time change of data paths by setting up routes with QoS support, considering available communication resources at each node in advance. Therefore, in this thesis, we propose an adaptive QoS support method using hello message in order to rapidly meet with the change of available communication resources and to smoothly perform route maintenance. For performance evaluation, we analyzed the average data reception rate. At that time, we used evaluation parameters such as node's mobility-stop time, hello message period, and packet priority, considering the node's mobility and the number of best effort/QoS data flows. As results, we found that with our proposed method the average data reception rate was increased 16.293%, 15.914%, 17.238% for 300 mobility-stop second case and 4.809%, 4.264%, 2.956% for 300 mobility-stop second case.

One Arm Curl 동작의 Simulation

조동욱,서국웅,윤양진,김정태,조승제 釜山大學校 附設 體育科學硏究所 1997 體育科學硏究所 論文集 Vol.13 No.-

In recent years, numerical simulation of human body motion has received an increasingly wider range of application. Computer simulations have greatly contributed to the understanding of kinematics and dynamics of human motion. Such simulations are being used in ergonomics to better understand and thus improve the interaction of persons with machines and with workplace configurations. In sports, the simulations are being used to optimize performance, to develop equipment for injury prevention, and to speed and enhance recovery from injury. Then in this study simulated one arm curl motion for understanding force and moment in arm's each joint, and this segment modeling was used 2-dimension, 3-link system. From simulation of mathematica 3.0 we found kinematic and kinetic factors with imaginatively lift of dumbbell and simulated random value of the last curl angle, weight of dumbbell, cycle of motion and so on. The conclusions of this study is as follows ; 1. As this study link system, weight of dumbbell influence not a stance and motion but magnitude of force and moment. 2. The force showed even as smooth curve in all cycle. Moment showed biggist between 0.5sec and 1.5sec. The magnitude order is shoulder, elbow and wrist joint. 3. Motion of system in this study is very similar human arm's motion considering that law of inertia and helped effectively delegation of force. 4. Mathematica is useful language as simulation program. Forward it needs study about modeling and simulation on muscle factors, also human body simulation.