韓國人의 各 臟器組織中 靑酸鹽의 微量分布에 關한 硏究(Ⅱ)

張成吉,金恩浩,金英雲,李鎭勳,柳在薰,權五星,金明德,吳世珍,金由那 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

국어과 교육에서의 신문 활용 방안 연구

김영경,임성운 順天大學校 師範大學 附屬 科學敎育硏究所 2002 科學과 敎育 Vol.10 No.-

This study showed that applying newspapers to Korean Language Education is helpful to develop a critical and a creative ability which need in Korean Language Education by making leaners do a variety of learning experiences and activities. It turned out that in class learners could use them in each field such as listening, speaking, writing, reading, the knowledge of Korean and literature by presenting new teaching method, panting to use newspapers. We used the style of newspapers as a way of maximizing learners' interest and education effect of learning novels. After reading novels, learners can change them into various styles, like articles, editorials, columns and so on. In addition, they can compile 'critical understanding' or 'interpretative text'. Therefor, newspapers is very useful to teach novels because the seventh course of education emphasizes 'Learners' acceptability an creative ability' of the literary work and 'an appreciative ability' in the social relation.

기울어진 얼굴 영상에서의 특징 추출 및 계층화에 관한 연구

김상운,신성효 명지대학교 공학기술연구소 1993 공학기술연구소 논문집 Vol.8 No.-

In this paper, we propose a facial recognition method that accommodates various scale and slope information. Standard facial images and tilted facial images are captured by CCTV camera, transformed to binary image through use of filering and edge detection method. Depending upon the slope information taken from the relative position of left and right eyes, the tilted images are rotated. Then the facial images are subdivided into functional components using the projection profiles. Consequently, positional information represented by a 3 by 3 matrix was used to yield slope and ratio of distance. To further increase the efficiency in recognition, fuzzy linguistic variables are calculated from the real numbers thus produced, and put into an hierarchical order. Experiments show about 90% of recognition rate for the sample images of 30 frames when the slope of input image was considered, and this result can be a great advance compared with the slope of input image was not considered.

DAWG를 이용한 한글 단어 사전의 구현

김상운,신성효 명지대학교 공학기술연구소 1994 공학기술연구소 논문집 Vol.9 No.-

The word dictionary should have the capability of storing a large amount of word data, as well as supporting high retrieval. Trie may be used to compress the common prefix of contained words in the dictionary. The structure, however, has a drawback of the low utilization in memory space because of null pointers in character nodes. Here, we propose a new structure for Hangul word dictionary which can be used to compress the common suffix as well as the common prefix using DAWG(Directed Acyclic Word Graph). The DAWG of the linked list structure is transformed into the array structure for the storage efficiency and rapid search. Simulation result, which are performed through all sorts of school names in Korea, show that the dictionary by DAWG can compress the memory space more efficiently than the trie and decrease the total searching time. The decreased time is based on the reduction of the number of block I/O at each retrieval.

음낭외상시 고환파열에 대한 초음파 검사의 진단적 유용성

김경영,한동준,신대은,노준,문형윤,임동훈,김철성,박성운 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.3

Purpose: We determined the use of scrotal ultrasonography in the initial diagnosis and management of testicular injuries due to blunt scrotal trauma. Mateiials and Methods: We reviewed 54 patients of scrotal trauma in the last 8 years. Forty patients were evaluated by ultrasonography preoperatively. A heterogeneous echo pattern of the testicular parenchyma with loss of oval shape, contour definition was the basis for diagnosis of testicular rupture. Among them, 33 cases underwent scrotal exploration and 7 cases were managed conservatively. The remaining 14 patients were evaluated only by physical examination, 8 patients of them were explored immediately because of suspicious testicular mpture. The accuracy of ultrasonography were determined by comparing radiographic interpretations with intraoperative findings. Results: Among the 33 patients who were evaluated by ultrasonography and explored immediately, there were 26 suspected testicular ruptures on ultrasonography. Surgical exploration revealed testicular rupture in 23 and simple hematoma in 10. The testicular rupture was correctly diagnosed by ultrasonography in the 22 cases, and there were 4 false-positive and 1 false-negative diagnoses of testicular rupture. The sensivity and specificity for the diagnosis of testicular rupture are 96% and 60%, and the positive and negative predictive values are 85% and 86%, respectively, Conclusions: Scrotal ultrasonography, with the main radiographic finding of a heterogeneous echo pattern of the testicular parenchyma with loss of oval shape, contour definition, is highly sensitive on the diagnosis of testicular rupture. And it increases the salvage rate for testicular rupture with preservation of the testicular function and prevents delayed complications of chronic pain, atrophy and orchiectomy associated with missed testicular rupture.

IMT-2000 위성시스템의 다중경로 페이딩 채널에서 STTD기법 성능분석

김홍철,김학성,서상우,박운용,신요안,이원철 崇實大學校 2000 論文集 Vol.30 No.1

Recently various types of transmit diversity schemes on time, frequency and space domains to overcome multipath fading have been studied. In particular, an open loop transmit diversity scheme called space-time transmit diversity (STTD) which is based on space-time block codes, is adopted in 3GPP IMT-2000 terrestrial system standard. In this paper, we apply the STTD to IMT-2000 satellite system and investigate its performance. We show that significant performance improvement can be achieved by applying the STTD to two visible satellites in IMT-2000 satellite systems.

직류 서보 전동기를 대상으로한 적응퍼지속도제어기의 설계

김호찬,조성범,문동춘,고봉운 제주대학교 공과대학 첨단기술연구소 2001 尖端技術硏究所論文集 Vol.12 No.2

This paper presents a study of the performance of a DC servo motor with a model reference adaptive fuzzy speed controller (MRAFSC) in the presences of load disturbances. MRAFSC comprised inner feedback loop consisting of the fuzzy logic controller (FLC) and plant, and outer loop consisting of an adaptation mechanism which is designed for tuning a control rule of the FLC. Experimental results show the good performance in the DC servo motor system with the proposed adaptive fuzzy controller.

Pseudo-Gitelman씨 증후군 1예

김성렬,조영일,이해운,이정연,안해련,송종오,명승운 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-

Gitelman's syndrome is a rare disorder with a characteristic set of metabolic abnormalities. These include hypokalemia, metabolic alkalosis, hypocalciuria and hypomagnesemia. The clinical manifestations of Gitelman's syndrome are very similar with those of Bartter's syndrome and diuretic abuse. Gitelman' syndrome and Bartter's syndrome can be distinguished by renal clearance study after administration of furosemide and thiazide, since the primary defect in each of these disorders is an impairment in sodium reabsorption in the distal tubule and loop of Henle, respectively. Pseudo-Bartter's syndrome due to diuretic abuse can be distinguished by history of diuretic use and a positive urine assay for diuretics. We have experienced a case of pseudo-Gitelman's syndrome in 56-year old woman with unexplained hypokalemic metabolic alkalosis, hypocalciuria, and hypomagnesemia. The patient denied ingestion of diuretic medication. The results of renal clearance study using furosemide and thiazide in this case suggested the presence of the primary defect of sodium reabsorption in the distal tubule rather than in the loop of Henle. These clinical and laboratory findings were consistent with those of Gitelman's syndrome. But, this case was confirmed as pseudo-Gitelman's syndrome since diuretics were detected by a urine assay for diuretics. Furosemide and hydrochlorothiazide were contained in the pill that she had been taking due to constipation. Herein, we report the case of pseudo-Gitelman's syndrome by abuse of cathartics containig diuretics presented as Gitelman's syndrome in renal clearance study.

X-cut LiNbO_3 광도파로 제작 및 패턴 특성

정운조,김성,박계춘 木浦大學校 應用科學硏究院 2001 應用科學硏究誌 Vol.1 No.-

The optical near field patterns, propagation loss and mode sizes of x-cut Ti:LiNbO_3 optical waveguide which was fabricated by Ti-diffusion varying with Ti strip thickness in wet oxygen atmosphere were investigated and tested at optical wavelength 1550nm. As Ti thickness increased from 760Å, the insertion loss of waveguide was decreased. But at Ti thickness 1500Å, mode sizes are widely broadened. This Ti thickness of below 1100Å and above 1500Å showed negative effects to propagation loss and fiber coupling. The best Ti thickness for fabricating low propagation loss and good fiber coupling. The best Ti thickness for fabricating low propagation loss and good fiber coupling was inferred to be between 1100Å-1500Å in our conditions. And for Ti thickness 1150Å, its propagation loss, horizontal/vertical mode sizes were measured 1.61dB/cm, 11.9/8.9㎛ for TM, 0.22dB/cm, 12.0/9.1㎛ for TE respectively.

GA를 이용한 다층 퍼셉트론 분류기의 구조 학습

신성효,김상운 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

In this paper a structural learning method for Multi-Layered Perceptron(MLP) classifiers using Genetic Algorithm(GA) is proposed. The method consists of two stages : candidate-structure-extraction and node-link-pruning. The first stare generates automatically the candidate structure of MLP classifier for a given problem. Then the second stage prunes off the non-useful nodes of the structure for obtaining the near-optimal one. To evaluate the proposed method we experiment with three kinds of data set : two dimension's XOR four dimension's IRIS, and eight dimensional handwritten-digit NUMBER. Experimental results show that our method could generate a task-related MLP structure which does not contain unimportant nodes, and could decrease the teaming time by 50 % without degrading the classification ratio.