한국인 혼합치열기 아동의 두부방사선계측학적 연구

손동수,김진태,이상훈,한세현,김종철,선예경 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.2

The purpose of this study was to obtain roentgenocephalmetric norms of the Korean mixed dentition children which are used in the occlusal guidance treatment. The 121 subjects(57 males and 64 females) were consisted of mixed dentition children who showed up in Department of Pediatric Dentistry Seoul National University Hospital from June 1990 till February 1993 and contestants of the Heathy Dentition Contest in 1992 and 1993. The subjects had normal profiles and occlusions without severe carious lesions or missing teeth. Following results were obtained from Sassouni, Ricketts and McNamara analysis; 1. Norms and standard deviations of the children were obtained. 2. ANS, upper incisor, pogonion, upper 1st molar and gonion were located posterior to their reference arcs and B was located anterior to its reference arc. 3. Lower anterior facial height was longer than upper anterior facial height and upper posterior facial height was longer than lower posterior facial height. Mandibular corpus length was longer than anterior cranial base length. 4. Anterior cranial length was longer in male(p<0.05) and mandibular corpus length was longer in male than in those of female(p<0.01). Porion was located more posterior in male than in those of female(p<0.05) 5. Effective mandibular length and lower anterior facial height were longer in male than in those of female(p<0.005). Effective midfacial length was longer in male than in those of female(p<0.05).

白朮散과 白扁豆가 白鼠 小腸과 大腸 杯狀細胞內 粘液質에 미치는 影響

金鎭澤,金兌勳,金東煥 동국대학교 한의학연구소 1993 東國韓醫學硏究所論文集 Vol.2 No.2

This study was performed to identify the effect of Backchulsan and Backpeundu, on the mucosubstances of the goblet cells in the small and large intestines of the mouse. After injected castor oil into oral cavity, the experimental animals were administrated with 5.952mg per 30g body weight of Backchulsan, with 0.519mg per 309 body weight of Bckpeundu. The specimens used in this study were obtained from the small and large intestines of the mouse. All specimens were stained with periodic acid-Schiff reaction, alcian blue pH 2.5 and alcian blue pH 1.0 procedures. The results were as follows 1. The most remarkable decrease of neutral and acid mucosubstance was observed in the control group 1 and 6 hours after castor oil administration. 2. Increase of neutral and mucosubstance was observed in Backchulsan administration group 3 hours in comparision with that of control group administrated of castor oil, especially of the upper and lower villi regions. 3. Increase of neutral and acid rnucosubstance was observed in Backpeundu administration group 6 hours in comparision with that of control group administration of castor oil. 4. The most remarkable increase of neutral and acid mucosubstance was observed in Backchulsan administration group after 3 hours in comparision with that of Backpeundu administration group.

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.

방사선사진의 인덱스-순서 분석을 통한 치아경조직의 탈염화 검출

박동현,박영호,김경숙,박정훈,이기자,최삼진,최용석,황의환,박헌국 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.2

Purpose : The purpose of this study was to develop the radiographic technique for detecting the demineralization which is known as indication of dental caries. Materials and Methods : This technique was based on the comparing of multiple radiographs which was irradiated by multiple X-ray spectra. For the meaningful comparing, the multiple radiographs were reconstructed to the dosimetrically consistent images using a standard material. The difference of resulting images of same target with multiple spectra represents the difference of response of material as regards the spectra. Results : We have found about 10% of demineralization of dental hard tissues particularly in the proximal region through the analyzing of differences. Conclusion : Most intriguing thing in this investigation was that the method to analyze difference shows us to an anatomic structure of dental hard tissues even if absolute values of optical density were excluded during the procedures.

비정형 기관지 유암종에 의한 이소성 ACTH 증후군 1례

이창훈,천남일,홍세인,정진욱,윤인석,조동혁,강호철,정동진,정민영 全南大醫大 2001 전남의대학술지 Vol.37 No.2

Umbilicaria esculenta가 생산하는 Depside계 화합물의 구조 및 Phospholipase A₂ 저해활성

김진우,송경식,장현욱,유승헌,유익동 영남대학교 약품개발연구소 1996 영남대학교 약품개발연구소 연구업적집 Vol.6 No.-

Phospholipase A₂(PLA₂) is lipolytic enzyme that has known to be involved in inflammation. In the course of our screening for antiinflammatory compounds from natural products, a compound having PLA₂ inhibitory activities was isolated from the methanol extract of Umbilicaria esculenta. The compound was identified as lecanoric acid based on various NMR studies including DEPT, HETERO-COSY and HMBC experiments. Lecanoric acid inhibited human rheumatoid synovial PLA₂ activity with IC_(50) of 0.17 mM and also exhibited antitumor activity (ED_(50)=2.7μg/ml) against skin tumor cell line (LOX-IMVI).

족저압력분포 측정장비를 이용한 골프 스윙시 족저압 분석

이동기,이중숙,이범진,이훈식,김용재,박승범,주종필 한국운동역학회 2005 한국운동역학회지 Vol.15 No.1

D. K. LEE, J. S. LEE, B. J. LEE, H. S. LEE, Y. J. KIM, S. B. PARK, J. P. JOO. PIantar foot pressure analysis during golf swing motion using plantar foot pressure measurement system. Korean Journal of Sport Biomechanics, Vol. 15, No. 1, pp. 75-89, 2005. In this study, weight carrying pattern analysis and comparison method of four foot region were suggested. We used three types of club(driver, iron7, pitching wedge). This analysis method can compare between top class golfer and beginner. And the comparison data can be used to correct the swing pose of trainee. If motion analysis system, which can measure the swing speed and instantaneous acceleration at the point of hitting a ball, is combined with this plantar foot force analysis method, new design development of golf shoes to increase comfort and ball flight distance will be available. 1. Address acting, forces concentrated in rare foot regions and lateral foot of right foot. Back swing top acting, relatively high force occurred in medial forefoot region of left foot and forefoot region of right foot. Impact acting, high force value observed in the lateral rarefoot region of left foot and medial forefoot region of right foot. Finish acting, force concentration observed on the lateral region and rarefoot region of left foot. 2. Forces were increased in address of right foot with clubs length increased. All clubs, back swing top acting, high force value observed in the lateral forefoot region of right foot. All clubs, in impact, high force value observed in the lateral rarefoot region of left foot and medial forefoot region of right foot. Finish acting, force concentration observed on the rarefoot region in driver and lateral foot region in iron on left foot. 3. Right foot forces distribution were increased in address, back swing top and left foot force distribution were increased in impact, finnish

MRC 결합의 레이크 수신기에서 채널 추정 알고리즘의 성능분석

오동진,나철훈 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

In this paper, we analyze channel estimation algorithms in a RAKE receiver with MRC. There are 3 popular channel estimation algorithms, which are WMSA(Weighted Multi-Slot Averaging) algorithm, EGE(Equal Gain Estimation) algorithm. and SSE(Symbol-to-Symbol Estimation) algorithm. We analyze asynchronous IMT-2000(3GPP) which employ 3 different channel estimation algorithms by using MATLAB. We used jakes fading channel model for the analysis. From simulation results, we could observe that the performance of WMSA algorithm is better than others in low Doppler effect(3km/h). However, in the case of high Doppler effect(120km/h), the EGE algorithm is more efficient. In this case the simple estimator with EGE algorithm seems to be more useful.

초경 시작 시기가 여성 정신분열병 환자의 병의 경과에 미치는 영향

김진훈,윤선욱,배명지,임선진,정은기,장동원 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.5

Objectives : The protective effects of estrogen against the development of schizophrenia have been investigated in various perspectives, Previous studies showed patients with earlier age of menarche had later onset of schizophrenia and less frequent admissions. This study was performed to evaluate the effect of the age of menarche on subsequent courses including hospitalizations, suicidal attempts, Physical harm to others, and psychotic symptoms in women with schizophrenia. Methods : Self-report menarche age, onset of psychotic symptoms, and clinical status were collected in a sample of 108 Premenopausal women with the diagnosis of schizophrenia. Results : There was significant correlation between the age of menarche and the frequency of admissions (r=.321, p=.006). Also, Patients with history of physical harms to others showed later age of menarche than those without (t=2.025, df=106, p=.045). Conclusion : In women with schizophrenia, the age of onset of menarche affects subsequent courses indicated by frequency of admissions and violent behaviors. It is suggested that identifying the age of menarche might be helpful to predict the courses in women with schizophrenia. Further investigations regarding the relationship between estrogen and the courses of Schizophrenia in women are needed.

미세혈관 문합술을 이용한 절단된 귀 재접합 치험례:1례보고

김정헌,이현택,박배근,김동철,황성진 대한성형외과학회 1992 Archives of Plastic Surgery Vol.19 No.3

The auricle is frequently exposed to trauma due to its protruding anatomical position and it is sometimes severed completely. Many kinds of techniques such as composite graft or cartilage preservation methods for the reattachment or reconstruction of and amputated ear have been tried. But their indications are limited and results are not satisfactory. For the complete survival of ear cartilage and skin of the amputated part, microvascular replantation is known as the best procedure. But cases of successful replantations have been rare until now, because of technical difficulties due to the small size of auricular vessels and uncertain vascular anatomy. In 1980, Pennington et al. reported the first successful microvasclar replantation of a totally avulsed ear using vein graft. After that about 10 cases of world wide successful micro replantation of servered ears were reported. Here, we report a case of a successful replantation of a completely amputated lower half of auricle including the ear lobule due to a human bite. Replantation was done by direct anastomosis of transected peripheral branches of the posterior auricular artery and vein without vein graft. We again emphasize that, in spite of the technical difficulties and long operative time, successful replantation of an amputated ear with microvascular surgery is superior to any other methods of reattachment or reconstruction.