곡선 전개를 이용한 형태 추출

김성곤,신문걸,김두영 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1

Shape modeling is an important part of computer vision. Shape models help the tasks of object representation and recognition. In this paper, curve evolution and level set algorithms are used for extracting a shape within an image. This method is based on the ideas developed by Osher and Sethian to model propagating solid/liquid interfaces moving with curvature-dependent speeds. We propose the new generalized formulation and stopping function of evolution for more accurate extraction of shape. Our method canbe applied to model arbitrarily complex shapes and has the ability to dynamically sense the topological changes of the shape during the shape recovery process.

1990년도 인하대학교 재학생의 심리성향 분석

김창걸,이상란 仁荷大學校 學生生活硏究所 1991 學生生活硏究 Vol.11 No.-

14각형 헥사아자 거대고리 구리(II)착물과 음이온의 반응에 미치는 리간드의 치환기 효과

姜信杰,李成得성득,權在槿,鄭守炅 大邱大學校附設 基礎科學硏究所 1991 基礎科學硏究 Vol.8 No.-

Reactions of copper(In complexes of 1, 8-dimethyl-, 1, 8-diethyl-, and 1, 8-dipropyl-1, 3, 6, 8, 11, 13-hexaazacyclotertradecanes(A, B, and C, respectively) with halide and pseudohalide ions have been studied in aqueous solutions by spectrophotometric method. It is observed that the equilibrium constants(K) of these reactions decrease with the ligand structure in the order A> B>C for anions and decrase with the anions in the order SCN^(-)>N_(3)^(-)>Br^(-)>Cl^(-) for complexes. The values of K increased with increasing temperature. Thermodynamic parameters obtained from the equilibrium constants are investigated.

메타분석을 통한 가정특성 관련변인이 학업성취에 미치는 영향

박성열,구병두,임현걸 건국대학교 교육연구소 2000 論文集 Vol.24 No.-

This paper was designed to synthesize quantitatively the master's theses and doctoral dissertations focusing on effects of family background traits related variables on academic achievements in Korean. This task was accomplished by utilizing the meta-analysis technique of research integration as defined by Glass(1982). Basically, meta-analysis is a statistical analysis of the summary findings of many empirical studies. Its purpose is to draw reliable and general conclusions form a large and complex body of literature on a common topic. Thus, the primary purpose of this paper was to conduct a quantitative synthesis of 96 master's theses and doctoral dissertations focusing on the effects of academic achievements using family background traits as independent variable and academic achievement as dependent variable. Nine independent variable were chosen by means of in depth review of those previously mentioned 96 studies. The independent variables employed in this study include psychologcal environment, physical environment, family structure, public and private educational expenditures, education process, breeding and education method of parents, socio-economic status, parents' characteristics, and role expectation. These variable are cartegorized by two different groups according to the traits of factors in terms of family environment variable group and parent's characteristics variable group. This study set the following questions to be answered: (1) How large are the grand average effect size of variables of family background traits proposed in this study on student's academic achievement?; (2) How different the effect size of the two family background traits related variable groups, naimly family environment and parents characteristics variable group on student's academic achievement?; and, (3) How different the effect size of the nine family background traits related independent variables on student's academic achievement? In order to answer the research questions, the researcher followed the standard procedures as such locating published studies to collect primary data, analysing and cording the characteristics and outcomes of the studies, and carring out statistical procedures of mata-analysis to describe the overall and sub-variable effects. Primary source of data was decided to limit within the master's these and doctoral dissertations in order to achieve the reliability and validity of the study results. By using the CD-ROM titled 'masterㆍdoctoral dissertation index' published by National Central Library in 1995 and 1997, a total of 112 studies were located and collected. Out of 112 studies, 96 studies were selected by excluding those studies that are not possible to employ mata-analysis such as studies used qualitative research method. While classifying family background traits related variables some of studies were also excluded in this study due to failing a consensus among the five specialists participated in this process. The effect size were calculated by using two different approaches depending upon the applicability of effect size formula. One was by using mean and standard deviation of experimental group and their countpart. The other was using transformational formula suggested by Wolf(1986) for the studies that have not presented descriptive statistics. The result of this study may be summarized as follows: (1) The grand average degree of effects of the academic achievement factors proposed in this study turned out to be .33. This means that if the average size of effects of the academic achievement factors of the controlled group is 50 percentile in normal distribution, that of the experimental group becomes 62.93 percentile. As it were, the latter surpass the former by 12.94 percentile. (2) Between the two groups of academic achievement factors proposed in this study, in terms of family environment variable group and parent's characteristics variable group, the former factors showed the higher average effect size, its average effect size being .35. Considering the grand average degree of effects size of .33,it can be suggested that those family environment related variables effects more on the student's academic achievement compare to the variables of parents' characteristics. Among the nine family background traits related independent variables on academic achievements proposed in this study, the variable of educational process showed the highest average effect size of 1.40, as followed by socio-economic status(effect size of 0.55),role expectation(effect size of 0.48), and physical environment(effect size of 0.40). The effect size of these variables turned out to be bigger that the grand average effect size of .33. This result means that these variable effects on student's academic achievement a lot more compare to other variable proposes in this study. In fact, the effect size of those variable such as phychologcal environment(effect size of 0.27), breeding and educational method of parents(effect size of 0.27), family structure(effect size of 0.26), public and private educational expenditures(effect size of 0.26), and parents' characteristics(effect size of 0.14) turned out to be much smaller than that of previously mentioned variables. It means that the variable of psychologcal environment, breeding and education method of parents, family structure, public and private educational expenditures, and parents' characteristics effect less on student's academic achievement compare to the variables of educational process, socio-economic status, role expectation, and physical environment.

1990學年度 新入生 實態調査

李相蘭,金昌杰 仁荷大學校 學生生活硏究所 1991 學生生活硏究 Vol.11 No.-

Adamkiewicz 동맥의 폐색에 의한 척수경색 1례

이광훈,이종걸,이태연,신동익,이성현,이상수,한설희,차상훈 대한신경과학회 1998 대한신경과학회지 Vol.16 No.4

Single-Port Robotic Cholecystectomy: Early Experience from 8 Cases

( Hyung Jun Kwon ),( Horyon Kong ),( Sang Geol Kim ),( Yun Jin Hwang ) 대한간학회 2017 춘·추계 학술대회 (KASL) Vol.2017 No.1

Aims: Single-port laparoscopic cholecystectomy (SPLC) is a technical concept to reduced pain and improve cosmetic results when compared to multi-port cholecystectomy. However, SPLC is associated with technical limitation due to the enhanced complexity of the approach and limited number of specialized instruments or platforms. On the other hand, using a robotic platform may overcome these problems and enable more precise surgical actions by increasing freedom of movement and by restoring intuitive instrument control. In this presentation, we report the early clinical experience of our first 8 sing-port robotic cholecystectomy (SPRC) cases. Methods: Between November 2016 and February 2017, eight patients underwent SPRC with the da Vinci Xi robot and single-site instrumentation. We retrospectively reviewed clinical data on those patients. Results: All of 8 patients had completion of SPRC. Seven patients were female and one was male. Average patient age was 43.3±11.8 years and BMI was 22.4±1.4 kg/m2. Three patients (37.5%) were diagnosed with chronic calculous cholecystitis. Three patients (37.5%) underwent operation for polypoid lesions of the gallbladder. One patient (12.5%) was diagnosed with acute calculous cholecystitis. The mean operation time (skin-to-skin) was 83.9±30.7 min, docking time was 13.25±8.1 min, and console time was 42.1±26.4 min. The intraoperative blood loss was negligible. The mean Visual Analog Pain Scale score 6hr after the surgery was 2.9±0.4. The mean length of hospital stay average postoperative hospital stay was 2.3±1.0 day. There were no intraoperative complication and one patient developed seroma on port site. Conclusions: Robotic single-port cholecystectomy appears feasible and safe in our early experience.

항정신병약물을 처음으로 사용하는 초발 정신증 환자에서 나타나는 체중 및 대사성 지표의 변화 : 후향적 연구

김우진,심주철,공보금,강제욱,문정준,김정은,김민걸,박민경,김성진,김현정,정도운 대한생물치료정신의학회 2011 생물치료정신의학 Vol.17 No.2

Objectives:This study was to identify weight & metabolic changes in first-episode psychotic patients with antipsychotics use and investigate the differences of weight & metabolic changes between first-episode psychotic patients and controls with antipsychotics use. Method:In this retrospective study, twenty eight first-episode psychotic patients and twenty eight controls with schizophrenia, schizoaffective or bipolar disorder defined by DSM-IV criteria were included. Information about demographic and clinical characteristics of the subjects was gathered from the medical records. Also body weight, sBP, dBP, fasting glucose, lipid profile and WBC count were evaluated before and after antipsychotics use. Rogistic regression was conducted to assess factors associated with weight gain. Results:First-episode psychotic patients showed more weight and BMI changes than controls after antipsychotics use, and these changes continue over 12 months. On the other hand, there were no significant factors associated with weight gain. Conclusion:The results of present study suggest that antispychotics is one of the major causes inducing weight gain of psychotic patients and antipsychotics-induced weight gain is more vulnerable to drug-naive first-episode psychotic patients.

Variations of AlexNet and GoogLeNet to Improve Korean Character Recognition Performance

( Sang-geol Lee ),( Yunsick Sung ),( Yeon-gyu Kim ),( Eui-young Cha ) 한국정보처리학회 2018 Journal of information processing systems Vol.14 No.1

Deep learning using convolutional neural networks (CNNs) is being studied in various fields of image recognition and these studies show excellent performance. In this paper, we compare the performance of CNN architectures, KCR-AlexNet and KCR-GoogLeNet. The experimental data used in this paper is obtained from PHD08, a large-scale Korean character database. It has 2,187 samples of each Korean character with 2,350 Korean character classes for a total of 5,139,450 data samples. In the training results, KCR-AlexNet showed an accuracy of over 98% for the top-1 test and KCR-GoogLeNet showed an accuracy of over 99% for the top-1 test after the final training iteration. We made an additional Korean character dataset with fonts that were not in PHD08 to compare the classification success rate with commercial optical character recognition (OCR) programs and ensure the objectivity of the experiment. While the commercial OCR programs showed 66.95% to 83.16% classification success rates, KCR-AlexNet and KCR-GoogLeNet showed average classification success rates of 90.12% and 89.14%, respectively, which are higher than the commercial OCR programs’ rates. Considering the time factor, KCR-AlexNet was faster than KCR-GoogLeNet when they were trained using PHD08; otherwise, KCR-GoogLeNet had a faster classification speed.

The MARCOPOLO Study of Ustekinumab Utilization and Efficacy in a Real-World Setting: Treatment of Patients with Plaque Psoriasis in Asia-Pacific Countries

( Sang Woong Youn ),( Tsen Fang Tsai ),( Colin Theng ),( Siew Eng Choon ),( Benny E. Wiryadi ),( Antonio Pires ),( Wei Hao Tan ),( Min Geol Lee ) 대한피부과학회 2016 Annals of Dermatology Vol.28 No.2

Background: Ustekinumab is a fully human monoclonal antibody approved for the treatment of chronic moderate-to-severe plaque psoriasis in adults. However, factors including efficacy, tolerability, ease of use, and cost burden may affect ustekinumab utilization. Noncompliance may, in turn, affect treatment response. Objective: To evaluate ustekinumab utilization in the real-world setting in Asia-Pacific countries. Methods: In this phase 4 observational study conducted in Indonesia, Malaysia, Singapore, Korea, and Taiwan, adults with plaque psoriasis receiving ustekinumab were followed for up to 52 weeks. Study endpoints were the proportion of all patients using ustekinumab according to label-recommended intervals and the proportion of Korean patients who achieved a psoriasis area severity index 75 response at week 16. Safety was assessed by monitoring adverse events. Results: Overall, 169 patients received ustekinumab (Korea, n=102; other countries, n=67). Just over half (56.2%) of patients used ustekinumab with the label-recommended interval from baseline to week 40; the proportion was higher in Korea (73.5%) than in other countries (29.9%), probably because ustekinumab was provided without charge for Korean patients up to week 40. Noncompliance increased after week 40 in Korea and from week 28 in other Asia-Pacific countries, with cost cited as the most common reason. At week 16, 56.9% of Korean patients achieved a Psoriasis Area Severity Index 75 response. Safety results were in line with those seen in previous studies. Conclusion: More than half of all patients in Asia-Pacific countries used ustekinumab as per the label-recommended dose interval, but reimbursement variations between countries may have confounded overall results.(Ann Dermatol 28(2) 222∼231, 2016)