뇌하수체졸중의 임상적 고찰

김정태,박봉진,성정남,김영준,조맹기,Kim, Jung Tae,Park, Bong Jin,Sung, Jung Nam,Kim, Young Joon,Cho, Maeng Ki 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.6

Objectives : Pituitary apoplexy is a well-described clinical syndrome resulting from pituitary hemorrhage, hemorrhagic infarction, or infarction, almost invariably occurring in the presence of an adenoma. We analyzed pituitary apoplexy with an emphasis on clinical presentation, pathology and predisposing factors. Methods : We reviewed 35 histologically proven pituitary adenomas, operated from January 1995 to August 1999, to select 8 cases which showed clinical or operative findings compatible with pituitary apoplexy. These patients were analyzed in terms of symptom and sign, hormonal status, and predisposing factors, pathologic findings. Results : Among 35 surgically treated tumors of the pituitary gland, 8 cases(23%) were diagnosed as pituitary apoplexy. The pathologic findings revealed hemorrhage(7 cases) and infarction(1 case) of pituitary adenomas. One case had predisposing factor of appendectomy. The most common presenting symptom and sign were sudden severe headache and visual disturbance. Conclusion : We treated pituitary apoplexy surgically and obtained good outcomes. Pituitary apoplexy due to massive infarction of the pituitary gland is very rare condition but surgical treatment by trans-spheniodal surgery showed a good result.

3차원 수치해석을 이용한 지진 시 수직구-터널 접속부 동적 거동 분석

김정태,조계춘,강석준,김기중,홍은수,Kim, Jung-Tae,Cho, Gye-Chun,Kang, Seok-Jun,Kim, Ki Jung,Hong, Eun-Soo 한국터널지하공간학회 2018 한국터널지하공간학회논문집 Vol.20 No.5

3D time history analysis was performed on vertical shaft-tunnel connection to provide insight into the dynamic stress-strain behavior of the connection considering the effects of soil layers, periodic characteristics and wave direction of earthquakes. MIDAS GTS NX based on FEM (Finite Element Method) was used for this study. From this study, it is revealed that the maximum displacement occurred at the upper part of the connection when the long period seismic waves propagate through the tunnel direction in soft ground. Also, stress concentration occurs due to different behaviors of vertical shaft and tunnel, and the stress concentration could be influence for safety on the connection. The results of this study could be useful for the seismic performance design of vertical shaft-tunnel connection. 수직구와 수평 터널 주위 지층 변화, 지진파 방향성이 접속부의 동적 거동 특성에 미치는 영향을 연구하였다. 유한 요소 기반의 MIDAS GTS NX 프로그램을 이용한 3차원 시간이력 해석을 통해 검토하였다. 연구결과 연약지반에서 장주기의 지진파가 수평 터널 방향으로 발생하였을 때 접속부 상부에서 최대 변위가 발생하는 것으로 나타났다. 또한 수직구와 수평 터널의 서로 다른 거동 및 지층 경계면의 영향으로 인해 응력집중 현상이 발생하여 문제가 될 수 있음을 확인 할 수 있었다. 연구 결과는 수직구와 수평 터널의 접속부 구조물 내진설계를 위한 기초자료로 활용 될 수 있을 것으로 기대된다.

아토피 피부염 환자에서 한방 추출물이 포함된 외용제품에 대한 임상 효과

김정태,정현아,노석선,김창훈,Kim, Jung-Tae,Jung, Hyeon-A,Roh, Seok-Seon,Kim, Chagn-Hun 대한한방안이비인후피부과학회 2007 한방안이비인후피부과학회지 Vol.20 No.2

Background : Atopic dermatitis is a chronic and recurrent allergy eczema, called as 'Tae-yul'. It is a characteristic dermatitis, diagnosed from baby to adult, that carries severe itching. Objectivd : The aim of this trial is to examine the effect and safety of Medibebe in patients with atopic dermatitis. Methods : We made a comparison between before and after the use this product. Volunteers who satisfied the requirements were enrolled in the study. Degrees of severity of atopic dermatitis were measured by SCORAD index. Results : After 4 weeks' use of Medibebe, SCORAD index showed a decrease of $20.0{\pm}10.2$(95% C.I: 17.1-22.9) compared with when it was not applied, which is a statistically meaningful change(p-value<0.0001). Subjective pruritus and Sleeping loss reported after both 2 and 4 weeks' use of Medibebe decreased in a statistically meaningful way(p-value<0.0001) compared with before the application. but, 2 cases out of all 50 subjects for the clinical trial were excluded on the way. Conclusion : As a result of applying the 4 items of Medibebe(cream, lotion, soap, and body cleanser) to patients with atopic dermatitis and watching the progress, it is concluded and considered that these cleansing and moisturizing products can be used by atopic patients safely and effectively with almost no side-effect.

Neurofibromatosis Type 2와 무관하게 발생된 척추 경막내 다발성 신경초종 - 증 례 보 고 -

김정태,성정남,박봉진,조맹기,김영준,Kim, Jung Tae,Sung, Jung Nam,Park, Bong Jin,Cho, Maeng Ki,Kim, Young Joon 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.4

Most extracranial schwannomas are solitary, but neurofibromas are frequently associated with other manietations of neurofibromatosis. Schwannomas that occur within the context of neurofibromatosis tend to be multiple, but multiple schwannomas without manifestation of neurofibromatosis type 2 are very rare. The authors report a very rare case of multiple spinal intradural schwannomas in the absence of neurofibromatosis Type 2 maniestations. A 40-year-old man suffered from longstanding low back pain and left side sciatica which was treated with two stage operations. MRI showed multiple intradural mass lesions extending from L1 vertebral segment to S1 vertebral segment. There were no clinical and radiological manifestations of Type 2 neurofibromatosis. Histologically confirmed diagnosis was schwannoma.

측파대 광 주입 락킹 기법을 이용한 밀리미터파 신호생성 및 실험적 분석

김정태,Kim, Jung-Tae 한국정보통신학회 2010 한국정보통신학회논문지 Vol.14 No.12

In this paper, we have proposed sideband injection locking method, heterodyne technique, to generate millimeter-wave signal. Microwave signals in cellular broadband mobile communication networks and distributed networks can favorably be generated and distributed by optical techniques. In principle, these techniques have already been investigated for optical control of phase-array antennas, characterization of photo-detector and phase locking of millimeter-wave oscillators and now being applied to wireless communications. The generation and transmission of millimeter-wave radio signals by optical means is of interest for future pico-cell broadband mobile communication system, especially for systems operating at frequencies of tens of GHz applicable to LMDS. We experimented and analysed the generation of millimeter wave signal. 본 논문에서는 밀리미터파 대역의 신호 발생을 위한 헤테로다인 방식인 sideband injection locking 방법을 제안하고 실험적으로 분석하였다. 향후, 무선 이동통신, 초고속 광대역 통신망 등에 사용되어질 밀리미터파 신호는 전기적 요소의 한계로 광학적인 요소에 의해 신호를 생성하는 방법이 많이 연구되고 있으며 광학적 기술에 기초한 소자기술 등이 발전되고 있다. 따라서 본 논문에서는 향후 밀리미터파 대역에서 사용되어질 LMDS(Local Multi-point Distribution Service) 등의 시스템에서 수십기가 헤르츠급의 광원으로 응용 가능한 헤테로다인 방식을 이용한 밀리미터파 대역의 신호생성에 대한 이론적 방법 및 실험적 고찰을 통하여 검증하였다.

Analyses of a Signal Traffic for Authentication in Mobile Sensor Network

김정태,Kim Jung-Tae The Korea Institute of Information and Commucation 2005 한국정보통신학회논문지 Vol.9 No.7

In this paper, we analyses of a traffic for authentication signaling in third generation mobile sensor network. In universal mobile telecommunication system, authentication functions are utilized to identify and authentication a mobile station and validate the service request network services. The authenticating parties are the authentication the serving general packet radio service support node access the authentication center to obtain the authentication with the mobile station. In this paper, we propose that the automatic cost-effective solution size of the authentication vector array.

반도체 레이저의 광 주입을 이용한 혼동 통신망의 암호화 기법 분석

김정태,Kim Jung-Tae 한국정보통신학회 2005 한국정보통신학회논문지 Vol.9 No.4

We theoretically studied synchronization of chaotic oscillation in semiconductor lasers with chaotic light injection feed-back induced chaotic light generated from a master semiconductor laser was injected into a solitary slave semiconductor laser. The slave laser subsequently exhibited synchronized chaotic output for a wide parameter range with strong injection and frequency detuning within the injection locking scheme. We also analytically examined chaos synchronization based on a linear stability analysis from the view point of synchronization based on a linear stability analysis from the view point of modulation response of injection locked semiconductor lasers to chaotic light signal.

광대역 통신시스템을 위한 수십 GHz 신호생성을 위한 수치 해석

김정태,Kim Jung-Tae 한국정보통신학회 2004 한국정보통신학회논문지 Vol.8 No.7

본 논문에서는 밀리미터파 대역의 신호 발생을 위한 헤테로다인 방식을 제안하였다. 향후, 무선 이동통신, 광대역 통신망에 사용되어질 밀리미터파 신호는 전기적 요소의 한계로 광학적인 요소에 의해 신호를 생성하는 방법이 많이 연구되고 있다. 광학적인 요소에 의한 여러 가지의 연구들은 주로 광검출기의 기능, 밀리미터파 대역의 발진기의 개발 등이 주로 이루어지고 있으며 무선 통신망에 적용하기 위한 소자기술 등이 발전되고 있다. 따라서 본 논문에서는 향후 밀리미터파 대역에서 사용되어질 LMDS(Local Multi-point Distribution Service) 등의 시스템에서 수십기가 헤르츠급의 광원으로 응용 가능한 헤테로다인 방식을 이용한 밀리미터파 신호의 생성에 대한 수치적인 방법에 대해 컴퓨터시뮬레이션을 통하여 검증하였다. In this paper, We have proposed an Heterodyne technique to generate millimeter-wave signal. Microwave signals in cellular broadband mobile communication networks and distributed networks can favorably be generated and distributed by optical techniques. In principle, these techniques have already been investigated for optical control of phase-array antennas, characterization of photo-detector and phase locking of millimeter-wave oscillators and now being applied to wireless communications. The generation and transmission of millimeter-wave radio signals by optical means is of interest for future pico-cell broadband mobile communication system, especially for systems operating at frequencies of 300Hz.

Analyses of Security Frame Structure for Broadband Communication

김정태,Kim Jung-Tae The Korea Institute of Information and Commucation 2004 한국정보통신학회논문지 Vol.8 No.7

인터넷을 이용한 정보가 모든 정보 전달의 기본이 되고 있다. 따라서 이러한 정보 전달의 보호를 위한 정보보호 산업이 급성장하게 되었다. 따라서, 본 논문에서는 유비쿼터스 환경 하에서의 각 가정의 홈 네트워크 구성을 위한 외부의 망을 고속화 할 때 필요한 보안적인 측면의 방법에 대해서 제시하고자 한다. 본 논문에서 제시하고자 하는 내용은 암호학적으로 안전한 광통신 기반의 네트워크의 구성과 이를 실현하기 위해서 요구되어지는 다양한 고려사항 등을 분석하여 차세대의 유비쿼터스 환경하에서의 정보보호 시스템 구축에 도움이 되고자 한다. Information transfer technology using Internet is basic means today. Therefore, we have to consider the information through internet. The main key is Information security against attacker. We have proposed the method employing security mechanism under ubiquitous environment. To realize the Information security for optical communication, we need requirement for a variety of consideration and propose the method..

읍·면 소재지 종합정비사업의 성과경로 분석

김정태,정남수,Kim, Jung-Tae,Jung, Nam-Su 한국농촌계획학회 2019 농촌계획 Vol.25 No.2

This paper considers the effect of "comprehensive rural community improvement project" in terms of three factors - physical environment, rural tourism, socioeconomic and analyzed the path effect leading to the final outcome - the quality of life of residents, using covariance structure analysis. By doing so, this study looks into why residents prefer the improvement of a physical environment that takes a public nature. The analysis showed that the socioeconomic effect did not have an immediate impact on the improvement of quality of life of residents at a significance level of 5%, whereas the improvement of physical environment had a static effect on the quality of living at a significance level of 1%. Residents' preference for "hardware" or physical environment may be attributed to lack of their understanding of human factors such as social capital. However, analyzing the impact of specific contents of the project on performance, it is found that as projects fail to generate a tangible socioeconomic effect, residents strategically prefer the repair of their physical environment such as public facilities that directly affect their daily lives, so that they can maximize an improvement of the quality of living. Hence, this study suggests that instead of attributing the failure of rural community development projects to residents, macroscopic problems of rural communities and specific contents of projects should be dealt with before the success of any project can be discussed.