구매의사결정 지원을 위한 실시간 가격비교 Agent 개발

권효석,류정섭,조형래 경상대학교 생산기술연구소 2001 工學硏究院論文集 Vol.1 No.-

The proliferation of the internet and related applications has made users struggle with information overload. It means users must spend more time to find and gather necessary information they want. The agent technique is advocated by many researchers as an alternative to overcome the difficulty, which resulted in the practical use of the agent technique in Electronic Commerce more common. In this paper, we propose a realtime price comparison agent which compares the prices and services among online stores in realtime without users' intervention. The proposed agent differs from the existing ones in that (1) it does not incorporate a pre-installed price database, (2) it automatically monitors users' current status without any input from the users.

파종시기가 다른 일미찰의 등숙 중 호화 특성 비교

김미정, 박효진, 이유영, 김선림, 김정태, 우관식, 권영업, 정일민 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2

This study was conducted to investigate the pasting properties of waxy corn ‘Ilmichal’ during ripening with different sowing date. Starch content of Ilmichal was increased as matured (p<0.05). Analysis of pasting properties with waxy corn starch using a rapid visco analyser (RVA) showed linear changes in peak viscosity, trough viscosity, final viscosity, breakdown and consistency according to ripening. There were significantly positive correlation between starch content of Ilmichal and peak viscosity (0.39*), trough viscosity (0.58***), final viscosity (0.58***), and consistency (0.57**). Differential scanning calorimerty (DSC). The enthalpy of gelatinization was increased as ripening. But onset and peak temperature were decreased. There were significantly positive correlation between starch content of Ilmichal and onset temperature (0.44*), peak temperature (0.38*), and completion temperature (0.59***), on the other hand, crude protein content presented significantly negative correlation between completion temperature (-0.41*).

전치태반의 임상적 고찰

정갑인,이해혁,이효환,유정완,남계현,이임순,이권해 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2

Objective : Our purpose was to make preparations of what for proper emergency care and delivery in order to improve maternal and fetal well-being. Methods : The study was undertaken for the clinical evaluation and statistical analysis on the patients with placenta previa who had been admitted and delivered at Soonchunhyang University Hospital from January, 1994 to May, 1998, retrospectively. Results : The incidence of placenta previa was 2.0%. Placenta previa has occurred more often in multigravida(92%) than primigravida(8%). Vaginal bleeding was most frequent(37.3%) presentation. The mean gestational age at the first bleeding episode was 31~35 weeks(46.4%). The type of placenta previa was totalis (31.3%), Partialis(18%), marginalis(32.7%), low lying(18%). Conclusion . This study indicates that the obstetrician and the pediatrician should be prepared for emergency care and delivery of the placenta previa patients, with the improvement of delivery room and neonatal intensive care unit.

飮食物쓰레기의 效率的 管理를 위한 物理的 特性 및 處理

권효정,정영헌,김임경,심언봉,오광중 부산대학교 환경문제연구소 2003 環境硏究報 Vol.21 No.-

This study was conducted to manage food wastes in Korea efficiently. We carried out an experiments on food wastes generated from Yeonjae gu, Pusan as a representative boundary according to the measurement of apparent density, generation quantity, physical characteristics, proximate analysis, and elemental analysis as well as drying and carbonizing, and also tested the hazardous materials in fertilizer and compost from public and private recycling center in operation. The purposes of this study are to investigate current status of food wastes recycling methods and facilities, to examine the fuelization of food wastes, and to suggest the cost effective food wastes treatment plans. Based on the results of the analysis of apparent density and water content in food wastes, it was revealed that the apparent density of food wastes was in inverse proportion to the water content. The water content of food wastes was highly influenced by the fruit and vegetables such as watermelons. These results indicate that the food wastes with about 75 ~80wt% initial moisture content should be reduced under 70wt% moisture content by drying process pier to throwing away. Comparing the heating values of the food wastes which were calculated by Dulong's equation and Steuer's equation it was revealed that Steuer's equation(HHV 5,186 kcal/kg, LHV 880 kcal/kg) was more compatible than Dulong's equation(HHV 4,676 kcal/kg, LHV 330 kcal/kg) because the results of proximate analysis for the food wastes were very similar to those of sewage sludges. Additionally, to reduce water contents of food wastes under 60wt% as acceptable water contents for fuelization, it was also found that blending with 25wt% chars made from food wastes was more efficient than the drying of food wastes itself at 105°C, 45minutes in view of completion time. Furthermore, these chars generated from food wastes (about LHV 6,608 kcal/kg) comparable to commercial charcoal(LHV 7,134 kcal/kg) generated from oak trees and lower ash contents(under 15wt% of chars) than those.

창의적 문제해결력 중심의 수학 교육과정 개발 및 적용 : 초등학교수준을 중심으로

김정효,권오남 한국수학교육학회 2000 初等 數學敎育 Vol.4 No.2

본 연구는 창의적 문제해결력 신장을 위한 수학교육과정을 개발하고, 그 적용효과를 알아보고자 하는데 목적을 둔다. 개발된 창의적 문제해결력 중진을 위한 수학교육과정은 수학의 개념적 지식(내용)과 절차적 지식(기능), 그리고 창의적 사고요소(확산적 사고와 비판적 사고) 등 3가지 요소를 기반으로 하였다. 세부적으로 보면 수학교육과정의 내용을 개념적 지식과 절차적 지식으로 이원화하여, 개념적 지식은 수학의 본질을 구성하는 4개의 주제를 중심으로 6개 하위영역을 연결하여 총괄 개념, 학년별 개념, 그리고 하위개념으로 구성하였고, 절차적 지식은 사고요소, 계산기능요소, 수학적 도구와 기술사용 등 3요소로 구성하였다. 한편 창의적 사고요소는 이러한 교육과정내용을 PBL을 기반으로 하는 단원개발을 하는 과정에서 융합되도록 하였다. 그 적용효과를 검증하기 위해서는 초등학교 5학년을 대상으로 1학기간 투입하고 수학적 창의적 문제해결력 검사를 실시하여 집단간 점수차이를 검증하였다. 그 결과 본 교육과정은 아동의 수학적 창의적 문제해결력 신장에 효과가 있는 것으로 드러났다. The purpose of this study is to develop and implement an alternative elementary mathematics curriculum to enhance creative problem solving ability. The curriculum consisting of three main elements was developed. The three elements are content knowledge, process knowledge and creative thinking skills. The curriculum contents and the units were developed by mathematics educators, elementary educators, psychologists, elementary school teachers and curriculum specialists for 3 years. In order to test the effectiveness of the developed curriculum, the 5 units based on a problem-based-learning(PBL) method were implemented in a 5th grade class as an experimental group during the second semester. For the comparison group the ordinary lesson based on the 6th national mathematics curriculum was implemented during the same period. Performance assessment was developed and used for the pre and post test. T-test was used to testify that the effect of the curriculum is statistically significant. The results of the test showed that the experimental group progressed significantly in the creative problem solving ability, but the comparison group did not.

3D CT를 이용한 파노라마 방사선 사진상 상악 매복 견치 위치 정보의 유용성 평가

김혜정,박효상,권오원 대한치과교정학회 2008 대한치과교정학회지 Vol.38 No.4

3D CT를 이용하여 파노라마에서 얻어진 상악 매복 견치 위치 정보의 유용성을 평가하기 위해, 상악 견치 매복을 주소로 경북대학교병원에 내원한 환자를 대상으로 파노라마 방사선 사진과 3D CT에서의 매복 견치의 위치를 평가하였다. 대상은 25명(남자 7명, 여자 18명)으로 평균 나이는 10.9세(범위 : 8.2 - 15.7세)이며, 35개의 상악 매복 견치 증례를 분석하여 다음의 결과를 얻었다. 첫째, 파노라마 방사선 사진은 확대되어 촬영되므로 3D CT의 계측치보다 상악 견치의 tooth length, crown width, vertical distance 그리고 lateral shift값에서 큰 값을 가졌다. 단, angulation to occlusal plane은 파노라마에서 더 작은 값으로 계측되었다. 둘째, 파노라마 방사선 사진상 상악 견치가 구개측으로 매복된 경우, angulation to occlusal plane은 3D CT보다 작게 측정되고 vertical distance는 더 크게 측정되었다. 셋째, 파노라마 방사선 사진에서 상악 매복 견치의 tooth length, crown width 그리고 순측으로 매복된 경우 상악 견치의 angulation to occlusal plane은 3D CT와 근접된 계측치를 가졌다. 또한 CT와 비교하였을 때, 치근 흡수 정도 평가에 대한 파노라마 방사선 사진의 감수성은 33.3%인 것으로 측정되었다. 파노라마 방사선 사진은 협측 매복견치의 위치는 실제와 유사하다고 생각되나 구개측 매복의 경우 3D CT보다 더 높게, 각도는 더 작게 나타나는 등 상당한 차이가 있어 CT를 이용한 추가적인 검사가 필요하다고 생각된다. Objective: The aim of this study was to evaluate the potency of panoramic radiography for the detection of maxillary impacted canines. Methods: Twenty-five patients were selected, comprised of 7 males (mean age: 10.9 years, range: 8.5 - 14.5 years) and 18 females (mean age: 10.9 years, range: 8.2 - 15.7 years). In total, thirty-five maxillary impacted canines were estimated. The position of the canine and root resorption of adjacent teeth were evaluated on panoramic radiography and 3D CT. Results: Except for angulation to the occlusal plane, the other parameters, such as tooth length, crown width, vertical distance and lateral shift showed larger values on panoramic radiography compared to 3D CT. In palatally impacted cases, the angulation of canine was smaller, and the vertical distance to the occlusal place was larger on panoramic radiography than 3D CT. For labially impacted canines, tooth length, crown width, and angulation to the occlusal plane were similar for the two methods. The sensitivity for detecting root resorption on panoramic radiography was calculated as being 33.3% of 3D CT. Conclusions: The position of labially impacted canines can be effectively estimated using panoramic radiography, but palatally impacted canines need further investigation such as 3D CT for proper diagnosis.

창의적 문제해결력 신장을 위한 수학교육과정개발 : 개념적 지식을 중심으로 Theme-Based Reconstruction of Conceptual Knowledge

김정효,권오남 이화여자대학교 교과교육연구소 1999 교과교육학연구 Vol.3 No.2

본 연구는 창의적 문제해결 신장을 위한 수학 교육과정을 재구성하기 위한 구성체제의 개발과 그에 따른 개념적 지식의 재구성에 목적을 둔다. 개발되어진 교육과정의 틀은 개념적 지식과 절차적 지식을 이원화하여 개념간의 연결을 도모하는 한편 절차적 지식의 한 요소로서 사고력을 강조하여 교육과정에서 사고력변인의 주요성을 가시화하였다는 특징을 가진다. 특히 개념적 지식은 수학의 본질적 요소와 관련한 연결주제를 선정하여 이를 중심으로 개념간의 관계에 대한 이해를 도모함으로써 수학이란 학문의 지식구조에 대한 깊은 이해를 가지도록 하였다. 이는 수학적 문제사태에서 학습자가 확산적 사고와 비판적 사고에서 사용할 수 있는 지식기반을 풍부히 가질 수 있도록 하기 위함이었다. 개발되어진 수학교육과정틀을 통해 구체적인 초등교육과정을 제시하였는데 이는 정보화사회에서 요구되는 창의적인 문제해결력을 교육하기 위한 체계적이고 실질적인 초등 수준의 수학교육과정이 될 수 있을 것으로 기대된다. This study is a part of a research to develop the elementary mathematics curriculum to enhance creative problem-solving abilities through reconstructing and specifying national mathematics curriculum. The developed mathematics curriculum is characterized as division of conceptual knowledge and procedural knowledge, and emphasis on relationship among concepts. The explicit network among concepts and between concepts and skills in the curriculum can help children have a powerful knowledge base for divergent and critical thinking in mathematical problem solving. for the relationship among mathematical concepts, the conceptual knowledge is reconstructed on the four themes, such as algorithm, relationship, pattern and generalization, and representation, which stems from the nature of mathematics. The results of reconstruction are presented in the form of matrix, such that the vertical axis represents how the concepts within each strand of mathematics curriculum are unified, while the horizontal axis shows how the concepts across the strands are related in terms of the themes.

남자 알코올 의존 환자에서 감정자각의 결함

이정재,조현진,권도훈,이승재,임효덕 大韓神經精神醫學會 2008 신경정신의학 Vol.47 No.1

Objectives : The individual's ability to recognize and describe emotion in self and others is an important concept of many psychiatric disorders. The purpose of this study was to investigate emotional awareness deficits in patients with alcohol dependence. Methods : 55 male inpatients with alcohol dependence and 28 male normal controls were evaluated by the Korean version of the Levels of Emotional Awareness Scale (LEAS-K), the Korean version of the 20-item Toronto Alexithymia Scale (TAS-20K), the Openness Experience Inventory (OEI) and the Beck Depression Inventory (BDI). The LEAS-K. is an objective measure to assess the ability to be aware of one's own or another's emotions and the TAS-20 is the most widely used subjective measure of alexithymia. Scores of these scales were compared between two groups using ANCOVA controlling age and BDI scores. Results : The LEAS-K scores were significantly lower in alcohol-dependent patients than normal controls. The TAS-20K total scores, factor 1 (Difficulty to IdentiIying Feeling, DIF) and factor 3 (Extemally Oriented Thinking, EOT) were Signifi-cantly higher in alcohol-dependent patients than normal controls. In contrast to the LEAS-K, the TAS-20K scores correlated significantly with the BDI scores. Conclusion : Emotional awareness is impaired in alcohol-dependent patients and it may not be related with depressive mood. Additional studies are needed to explore the significance of alexithymia, especially impaired emotional awareness, and its relationship to depressive mood in patients with alcohol dependence.

계층화된 퍼지 인지도를 이용한 신뢰기반 경매시스템

김현준,류정섭,권효석,조형래 경상대학교 생산기술연구소 2003 工學硏究院論文集 Vol.19 No.-

This paper introduces trust measurement that is composed of trust variables and fuzzy cognitive map. The improved trust measuring method using a stratified FCM can be used to measure the level of risk involved in a specific auction transaction concerned. To reduce the auction transaction cost and time, the proposed system recommends a differentiated transaction protocol according to the risk based on trust measurement. In this system, trust measurement can also be applied for differentiated and varied auction services.

구조화된 환자교육에 대한 연구논문 분석 : 고혈압 환자를 중심으로 forcused on the patients with hypertension

박청자,이경희,고효정,권영숙,김정남,박영숙 대한보건협회 2003 대한보건연구 Vol.29 No.2

This study was conducted to analyze the nursing research methodology and the key concepts used in articles related hypertension published in the RICH. The purpose of this study was for reflecting the trends of the research on the structured patient education focused the hypertensives. The results were as following. 1. There were 119 research studies related hypertension in RICH from 1994 to 2002. The number increased in 1997. Research studies of 98 have done since 1997 and it is 82% of the total research studies. 2. The most of the research studies are non-degree research studies. Research studies with fund have been rapidly increased in 2000 year. 3. The prevailing research design were the non-experimental design, quasi-experimental and pre-experimental designs in order. 4. The data collection method used most often physiologic measures(32.8%). 5. The domain of the key concepts that prevailed was health domain(51.8%), nursing domain(22.9%), and human being domain(20.5%) in order. And environmental domain (4.8%) were relatively low.