인터넷 중독 청소년들의 정신병리 및 대처 방식

안영균(Young Kyun Ahn),신영철(Young Chul Shin),고복자(Bok Ja Koh),심진현(Jin Hyun Shim),김범조(Bum Jo Kim),이승민(Seung Min Lee),이길홍(Kil Hong Lee) 한국중독정신의학회 2005 중독정신의학 Vol.9 No.1

This study was conducted to investigate the differences in psychopathology and coping strategies among internet addictors, over users and non addictors in high school students. Subjects were 273 high school students in Seoul city. Self rating questionnaires included demographic data, Young’s Internet Addiction Scale, SCL-90-R, Beck Depression Inventory, Spielberger State-Trait Anxiety Inventory, and The Way of Coping Strategy. Subjects were classified into 3 groups (addiction, over use, non addiction) by Internet Addiction Scale score. Prevalence of internet addiction was 4.3% and male adolescents were more addictive than female. Students who were mainly involved with internet chatting or game showed higher internet addiction score. The addiction group and over use group showed higher level of somatization, obsession, interpersonal sensitivity, depression, anxiety, hostility, and paranoia than non-addicted group. Addiction group and over use group used passive coping strategies more frequently in the stressful situation than nonaddicted group. Also, the regression analysis for finding out causal factors that predicts internet addiction showed that emotion relieving strategy were important variable which predict internet addiction. Interpersonal sensitivity and emotion relieving coping strategy was important to predict addiction. This study showed that problematic internet use was closely associated with psychopathology and psychiatric comorbidity. And high interpersonal sensitivity and emotion relieving coping strategy were related with internet addiction in adolescence.

Global computing 시스템에서의 문제점들과 스케쥴링

沈永喆 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

A large scale virtual parallel system which is composed of a large number of computers on the Internet and executes parallel programs is called a metacomputing system or a global computing system. In this paper we first introduce the global computing research which has already been performed or is being performed now and then discuss important issues that should be considered when we design and implement global computing systems. Among these issues scheduling becomes one of the most important issues and we propose the structure for a scalable distributed scheduler system. The proposed scheduler system has the composite structure of a tree and a graph and the characteristic of being both efficient and easily controllable.

온라인 네트워크 침입 탐지 및 감시 도구

沈永喆,卞慶根,張令敏 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.-

Due to the development in the computer and communication network technology, computers became widely available in every sector in out society and they are being connected by networks. for this reason there is a negative part in Internet environment. Schools, companies, and the government are threaten by hackers. So it is necessary to make Intrusion Detection System that can detect intrusion and manage it. In this paper, we design On-Line Network Intrusion Detection and Monitoring Tools. This tool consists of 4 modules and 3 DB. 3DB consist of Stored DB, Scenario DB, and Important Information DB. First, packet Capturing Module caputres packets in data link level. Second, Packet Analysis And Control Module classifies capturing packets into rlogin, telnet, smtp, ftp protocols and stores them in stored DB and send selected packets to On-Line Intrusion Decision Module. Third, On-Line Intrusion Detection decides Intrusion. Fourth, Monitor And Control Module checks Stored DB for System Security, Information Security and update, delete Stored DB, Scenario DB, and Important Information DB. This tool detects intrusion, but also gain informations about Information security and statistical data of network activities.

외상성 관절원판 전위에 의한 청각장애: 증례보고 : 증례 보고 A CASE REPORT

심정환,김영균,안철민 대한악안면성형재건외과학회 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.2

Fifty nine year-old male patient was referred for the correction of external auditory canal impatency according to anterior bony wall fracture of canal during the otolaryngologic treatment for hearing disorder. At clinical examination there are both temporomandibular joint(TMJ) pain, tenderness and left TMJ noise. We could find that if mouth was opened, external auditory canal impateted, and if closed, patented through otoscopy. We planned exploratory TMJ open surgery under clinical diagnosis of traumatic TMJ meniscus displacement and external auditory canal bony wall fracture, of under clinical diagnosis. During arthroplasty we found that posterior displaced meniscus pressured the fractured external auditory canal so we prepositioned meniscus anteriorly. After arthroplasty, TMJ noise disappeared and hearing funtion recovered. We experienced hearing disorder due to TMJ meniscus posterior displacement, so we present a case report with literature review.

범용 패킷 포획 도구의 개발

沈永喆,李浚源 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.1

Due to the advances in the computer network and communication technology, computers are populaurizing in every sector in our society and these computers are connected by networks such as the Internet. Although this environment facilitates people to share information and resources, it also provides hacker with posibility to steal valuable information and damage computer systems and networks belonging to other people. To remedy this problem, we develop many tools which capture network packets and analyze and/store them, but the problem with these tools is that it is difficult to add or change their functionality and connect them to other security tools, In this paper we explain a general purpose packet capturing tool which not only captures and analyzes/blocks packets. but can be connected to other security tools easily. We explain the architecture and the packet filtering specification language for this tool.

Support for the Software Development Using Extended Relational Database Systems

沈永喆 弘益大學校 科學技術硏究所 1994 科學技術硏究論文集 Vol.5 No.-

좋은 품질의 소프트웨어를 높은 생산성으로 생산할 수 있기 위해서 소프트웨어 공학의 분야는 데이타베이스, 인공지능, 그래픽스 등과 같은 타 분야에서 개발된 기술들을 많이 활용하고 있다. 이중 데이타베이스의 영향이 가장 크다고 할 수 있다. 본 논문에서는 먼저 소프트웨어공학이 데이타베이스로부터 어떠한 자원을 필요로 하는지 알아보고 다음 데이타베이스가 소프트웨어 공학을 어떻게 도울 수 있는지 분석한다. 특히 소프트웨어 공학의 기법 중 프로세스 관리, 도구 통합, 재사용, 자동 프로그래밍, 메트릭스를 사용한 소프트웨어 개발 등에 데이타베이스가 어떻게 활용될 수 있는지 분석한다.

만성 정신분열병 환자에서 지연성 운동장애와 음성증상 및 인지기능 장애와의 연관성

심주철,반철식,성기수,이정구,정도운,정청,윤진상,김영훈 대한신경정신의학회 2000 신경정신의학 Vol.39 No.4

연구목적: 정신과 전문병원에 입원해 있는 만성정신분열병 환자들을 대상으로 첫째 지연성 운동장애의 유병율과 위험인자들을 조사하고, 둘째 지연성 운동장애와 정신분열병의 음성증상 및 인지기능 장애와의 상관성을 조사하고자 한다. 방법: 연구대상자는 마산동서병원에 입원 중인 환자 중 DSM-IV의 정신분열별 진단기준에 부합하며, 최근 3개월 이상 동일 용량의 항정신병약물 복용한 271명(남자 174명, 여자 97명)의 환자들이었다. 지연성 운동장애에 대한 평가는 Abnormal Involuntary Movement Scale(AIMS)을 이용하였고, DSM-IV와 Sc-hooler와 Kane(1982)의 진단기준 양자에 부합하는 환자들만을 지연성 운동장애군으로 분류하였다, 정신 분열병 정신병리에 대한 평가는 Brief Psychiatric Rating Scale(BPRS)와 Schedule for the Deficit Syndrome(SDS)을 이용하였고, 인지기능에 대한 평가는 Mini-Mental Status Examination(MMSE)을 이용하였다. 결과: 지연성 운동장애의 유병율은 50.9%이었고, 50세 이상, 남자에서 높았다. 그러나 입원기간과 항정신병 약물의 일일 사용량에 따른 차이는 없었다. 지연성 운동장애의 호발부위는 혀, 상지, 입술과 입 주위의 순이었다. BPRS 총점 및 소항목 척도점수와 SDS 척도점수는 지연성 운동장애의 유무에 따른 차이가 없었다. MMSE 총점 및 소항목 점수도 지연성 운동장애의 유무에 따른 차이가 없었다. 결론: 평균입원기간이 9년 이상인 만성정신분열병 환자들에게서의 지연성 운동장애의 유병율은 50.5%이었고, 연령이 가장 의미있는 위험인자임을 확인했다. 만성정신분열병 환자들이 주 대상인 본 연구에서는 지연성 운동장애와 정신분열병의 음성증상 및 인지기능 장애와의 상관성은 입증하지 못했다. Objectives: The purpose of present study was to determine the prevalence rate of tardive dyskinesia and to search for its risk factors in chronically institutionalized schizophrenic subjects. We also examined the relationship between tardive dyskinesia and both negative symptoms and cognitive impairments in the same subjects. Methods: Subjects were 271 in-patients(174 males, 97 females) at Masan Dongsuh Hospital. They met DSM-IV criteria for schizophrenia and had been taking fixed doses of antipsychotics for at least 3 months. Tardive dyskinesia was assessed by Abnormal Involuntary Movement Scale(AIMS). Cases of tardive dyskinesia were ascertained by the criteria of Schooler and Kane (1982) and DSM-IV. The rating of psychopathology was acquired using Brief Psychiatric Rating Scale(BPRS) and Schedule for the Deficit Syndrome(SDS) and the assessment of cognitive function using Mini-Mental State Examination(MMSE). Results: The prevalence of tardive dyskinesia is 50.9% and the frequency of tardive dyskinesia was high est in male above the age of fifty. But there was no statistically significant relationship between the frequency of tardive dyskinesia and both the length of hospitalization and the daily dose of antipsychotics. The frequency order of abnormal movement in the patients with tardive dyskinesia was as follows : tongue, upper extremities, lips and perioral area. We couldn't find any significant difference in the total and subscale scores of BPRS between the groups with and without tardive dyskinesia. There were no differences in MMSE scores between the groups with and without tardive dyskinesia. Conclusion: This study gave us that the prevalence of tardive dyskinesia was high in chronically institutionalized schizophrenic inpatients and that age was the most significant risk factor of tardive dyskinesia. The relationship between tardive dyskinesia and both negative symptoms and cognitive impairment, however, was not revealed.

흡착제를 이용한 수중의 미량이취물질 분석법 개발에 관한 연구

심은기,김은호,곽철,황영기 경남대학교 신소재연구소 1999 論文集 Vol.11 No.-

본 연구에서는 다양한 흡착제들과 추출용매들을 사용하여 이취물질의 효율적인 분석기술을 개발코자 하였다. Geosmin의 흡착능 실험에서는 XAD 수지계통이 월등히 우수한 흡착능을 가진 것으로 나타났으며, 이중에 XAD-2 수지는 시료 100ml 당 300mg을 투여하였을 때 Geosmin 흡착능이 가장 뛰어났다. 추출용매별 Geosmin의 추출능 실험에서 액/액 추출법으로 실험하였을 때 MTBE와 Dichloromethane은 48%, 47%로 거의 비슷한 회수율을 나타내었고, XAD-2 수지를 이용한 고/액추출법으 경우에는 MTBE가 94% 정도로 회수율이 가장 높았고, Dichloromethane 79%, n-Hexane 39%, Diethylether 35% 순으로 나타났다. 염석제(NaCl)를 첨가하였을 경우에 Geosmin의 회수율 실험에서 MTBE를 이용하여 액/액 추출법으로 실험하였을 때 염석제 5g 첨가시 회수율이 75%로 가장 높았고, XAD-2 수지를 사용한 고/액추출법의 경우에는 추출용매 MTBE와 Dichloromethane에 대해 염석제의 투여에 의한 회수율의 증가는 없는 것으로 나타났다. XAD-2 수지의 진탕시간별 Geosmin의 흡착실험에서는 24시간 동안에 Geosmin에 대한 흡착량에는 거의 큰 변화를 나타내지 않았다. 최적의 흡착제는 XAD-2 수지이고 용매는 MTBE가 가장 안정적이고 우수한 것으로 평가되었으며, 액/액 추출법의 경우에 염석제를 첨가하였을 때가 첨가하지 않은경우 보다 회수율이 높게 나타났다. 고상 추출시 분석감도도 용매만 사용하여 추출한 결과보다 2배 가까이 높게 나타나 극미량 함유물질 분석시 전처리 기술로 응용 가능한 것으로 평가되었다. Even if odorous compounds remain very low concentration in water. it cause strong odor. Because Geosmin and most of odorous compound had very low vaporization. those were difficult to analyze with GC/MSD and Purge & Trap. So. we needed pre-treatment method for decreasing amounts of extracting solvents, improving recovery efficiencies and increasing analytical efficiencies. This study developed efficient technology for analyzing odorous compounds, using various adsorbents and extracting solvents. The optimum adsorbent was XAD resins. Especially, SAD-2. XAD-7 and XAD-2010 were superior. but XAD-2 of these and the optimum extraction solvent is MTBE. Other extraction solvents' efficiency is in order of MTBE〉Dichloromethane〉n-Hexane〉Diethylether. The optimum NaCl dosage for increasing efficiency is 5g in liquid-liquid extraction method. The shaking time(0-24hr) has no concern with adsorption efficiency. The optimum adsorbent is SAD-2 resin and extraction solvent is MTBE. Dosing NaCl. adsorption efficiency is increased in liquid-liquid extraction method, but NaCl has no effect on liquid-solid extraction method. In this experimental results. this method will apply to not only Geosmin but other well-known odorous compounds (2-MIB, 1BMP. IPMP, TCA) and algae toxins (Mycrocystin. Anatoxin etc.).

Rent-a-Server를 이용한 웹서버의 동적 할당

沈永喆,劉信根 弘益大學校 科學技術硏究所 1999 科學技術硏究論文集 Vol.10 No.1

The response time to a web request depends upon the distance between the web client and the web server, the load of the web server, and the network traffic. Replicated web serves can reduce the response time of web requests requesting not only static documents but also dynamic documents such as CGI scripts. They also increase the availability of web servers. the number and locations of the replicated web servers should be determined considering both how much web requests are generated and where they are coming from. In this paper we proposed a method of dynamically replicating web servers. When the load of a certain web server becomes too high, a new web server is created on the Rent-a-Server which is close to the domain from which heavy requests are coming from. When the load of a web server on a certain Rent-a Server becomes very low, the web server is removed from that Rent-a Server. We also introduced a method which selects the web sever that will service a user's request considering both the proximity of the web server from the client and the web servers' load.

산복도로에서 보는 釜山港 景觀의 構圖的 特徵 에 관한 硏究

심은경,강영조,김승환,남정칠,박승범,이기철,박한우 동아대학교 건설기술연구소 2000 硏究報告 Vol.24 No.1

This study is to clarify the characteristics of the type of view on a prospect from the road view, approach to the purpose of the maintenance plan of the road view. First, in the viewpoint of view is understanding meaning of the road, the method come into contact with a road view. Second, in the view appear an object land is grouping to the road view and presentation to a point in dispute and a settlement. This study have the keynote to different a form of view depend on viewpoint in a point view of prospect of road view, it will be presentation of practice method to the maintenance plan of the road view of the future.