중등 컴퓨터과학교육을 위한 객체지향형 EPL '두리틀'의 적용 및 평가

권대용,길혜민,염용철,유승욱,進兼宗,靖久野,이원규 한국컴퓨터교육학회 2004 컴퓨터교육학회 논문지 Vol.7 No.6

제 7차 컴퓨터교과 교육과정은 소프트웨어 활용 부분에 치중되어 컴퓨터과학에 관한 원리교육이 이루어지지 못하고 있다. 한편, ACM K-12 컴퓨터과학 교육과정 모델에 관한 보고서에서는 현재의 컴퓨터교육이 그릇된 방향이며 컴퓨터과학 중심의 컴퓨터교육을 위해서 프로그래밍언어 교육을 통한 원리교육의 중요성을 강조하고 있다. 본 논문에서는 프로그래밍 체험학습을 위한 객체지향 기반의 새로운 교육용프로그래밍언어인 두리틀(Dolittle)을 소개한다. 두리틀은 간결한 구문과 한국어와의 대응성, 인크리멘탈 방식의 프로그래밍, 수치, 문자열, 배열과 같은 알고리즘과 구조화, 텍스트 위주의 프로그래밍 등의 설계방침을 적용한 언어이다. 중학생을 대상으로 실제 수업에 적용해 보고 학습효과를 분석한 결과, 객체지향기반이지만 클래스나 상속 등의 개념을 모르고도 활용 가능한 교육용프로그래밍언어라는 것을 확인할 수 있었다. 또한 객체와 메소드 활용을 통하여 프로그래밍 결과를 쉽게 확인할 수 있고 오류 수정이 용이하므로, 학생들의 높은 흥미도를 유지하면서 학업성취도를 향상시키고 차후 학습으로의 연계가 수월하였다. Current computer education is difficult to educate basic concepts and principals of the computer science because the 7th curriculum of computer education is focused on the application of software. According to the ACM K-12 report about the computer science education model, current computer education is taking the wrong way and we should put the highly priority on the education of the fundamentals through programming languages for a better computer education oriented to the computer science. This paper introduces a new object-oriented educational programming language "Dolittle'". The design principals of Dolittle are simple syntax of Korean, incremental programming, text based programming, aliasing of function, and object-oriented programming. Being applied to middle school classes, we can confirm that Dolittle is easy to learn, and gives rise to high interest and keeps interest through a course,and also is of great practical use in class for programming novice.

面單位 農村地域의 類型化에 관한 硏究 : 西部慶南을 中心으로 Based on Sobu Kyongnam

愼英喆,李裕根,黃龍鎭 진주산업대학교 1992 論文集 Vol.31 No.-

本 硏究에서는 行政 및 文化生活의 基礎自 治單位인 西部慶南 9개 郡의 100개 面을 標本으로 삼아 因子分析方法등 여러 數理分析技法을 使用하여 村落의 形想를 3개 그룹으로 區分하며 農村地域의 特性을 나타내고 諸 指標를 利用하여 面單位의 農村地域의 土地利用特性과 類型化를 行하였다. 그 結果를 要約하면 다음과 같다. l) 判別된 平野村 25개, 準山村 49개, 山村 20개는 成功化率 94.0%로 3개 그룹으로 效率的인 村落區分이 이루어졌다. 2) 上位 5개 因子의 特性別 地域區分은 제1因子(人口가 많은 평야지대) 제2因子(畜産業이 盛한 地域), 제3因子(農家率이 높은 地域), 제4因子(果樹. 草地造成地域), 제5因子(沓作이 많은 地極)로 區分되었다. 3) 地域의 類型化는 Al類型(53개 面), A2類型(22개 面), B1類型(6개 面), B2類型(2개 面), C1類型(14개 面), C2類型(2개 面),D1類型(1개 面)의 7개 類型으로 區分되었다. 이러한 各 類型別 空間分布의 特性은 該當 農村地域의 地域開發과 關聯된 政策 이나 開發計劃樹立時 그 地域特性에 맞는 發展戰略과 手段이 될 것이다. This study is purposed to investigate the charactristics of using farm land and the classification of the area of rural community in Myo˘n Unit. With materials and methods to study in this paper, Cases and variables are given. The cases of rural settlement in So˘bu Kyo˘ngnam are one hundred. The variables of structure factor are twenty-three. The cases according to analysis are analysised by method of discriminant, factor and cluster analysis. From this study, The results obtained are as follows. 1) The cases of rural settlement are divided three groups by discriminant analysis. There are twenty-five plains, forty-nine Semi plains and twenty Mountain villages in So˘bu Kyo˘ngnam. 2) Five upper factors are analysised factor 1(populous plain), 2(high animal husbandry), 3(high farmhouse rate), 4(frute tree & pasture), 5(rice paddy field) on factor scores by factor analysis. 3) One hundred cases in So˘bu Kyo˘ngnam are classified according to rural settlement. Seven types of classification are the type of A1(53), A2(22), B1(6), B2(2), C1(14), C2(2), D(l).

마이크로프로세서를 이용한 3상 5레벨 PWM 인버어터에 관한 연구

金喆禹,金龍雄 부산대학교 공과대학 1985 硏究報告 Vol.30 No.-

Three phase 5-level PWM inverter using z-80 microprocessor is described. Microprocessor is used to generate reference wave and carrier wave, and to compute switching points for PWM patterns. By variation of modulation index M and frequency ratio R, inverter's output voltage is controlled in the real time. Harmonic components are analyzed theorically and experimentally. The experimental results agree with the theorical value and CVCF operation is suitable at the modulation index M=1.3~2.0.

氣 發生器에 대한 기초적인 연구 : SY 201을 중심으로

김경철,이용태 동의대학교 한의학연구소 1999 동의한의연구 Vol.3 No.-

In order to study of the oriental medical engineering, the Qigong infrasound treatment apparatus is analysed. The result is followed; 1. SY-201 type Qigong infrasound treatment apparatus is composed oscillator, amp, transducer. 2. The Qi production process is analyzed that EM wave changed wave of superlow frequency and penetrated the human body deeply.

해외물류거점확보를 통한 국제물류시스템 구축방안에 관한 연구 : 동북아지역권의 항만인프라시설을 중심으로 With reference to Northeast Asian Ports

고용기,김승철 한국유통정보학회 2001 유통정보학회지 Vol.4 No.1

This study is to develop intra regional international logistics strategies between ports and its annex industrial complex in Northeast. It begins with a description of the needs of and prospects for trade between Korea, Japan, China, and North Korea following explanation of the current economic status of these countries as well as trade and investment trends in the region. The following viewpoints are suggested for intra regional development strategies based on the current circumstances. First cooperation strategies and economic investment for promoting the mutual concerns and interests of these countries were developed. Second, a practical way of utilising the port development plans was devised to stimulate industrial and investment cooperation. Third, a method of building a network among major ports in Northeast was developed. Fourth, and international logistics system that makes connection between sea, land and air easier through logistics standardisation was suggested in preparation for the changing environment of logistics and production control. Finally, methods of improving neighboring feeder port facilities are suggested.

현대 프랑스어의 직설법 時制 체계

宋台鎔,鄭喆根 釜山大學校 1986 人文論叢 Vol.29 No.1

大邱市內에 있어서의 山羊 및 緬羊의 結核症에 對한 調査

孫濟英,金容珌,李學喆 慶北大學校 1962 論文集 Vol.5 No.-

Tuberculosis is rare in sheep and goats. In sheep most of the infection that have been typed in the United States were found to be of the avian-type, but in orther countries most have proved to be of the bovine-type. The data on tuberculosis in goats are very meager, so this fact gives an impression on us that goats are relatively resistant to infection. Infections, however, with human-type, bovine-type and aviane-type have been rarely reported. The obtained specimens (lung, liver, spleen) from a died goat at Taegu Agriculture and Forestry High school in March 1960 were examined bacteriologically and pathologically to diagnose the cause of its death. Moreover, the 10 sheep and 13 goats which had been together in the same pen with the died goat and the 11 sheep and 202 goats which had been fed in the surrounding area of Taegu city were tested on the tuberculin reaction with the intradermal method. The tuberculin was mamalian type (O.T.). The results thus obtained would be outlined as follows: 1. The death of the goat at above school was caused with a generalized tuberculosis infected through respiratory route by the bovine-type of tubercle bacilli. 2. The result of tuberculin test have proved that among 10 sheep and 13 goats which were fed together with the died goat, the positive reaction was found in 2 sheep (20%) and 2 goats (about 15.4%) and the doubtful reaction was found in 1 sheep (10%) and 2 goats (about 15.4%), but among 11 sheep and 202 goats which were fed in the surrounding area of Taegu city, the positive and doubtful reaction were found in 2 goats (about 1%) and 3 goats (about 1.5%) respectively, and all of the sheep reacted in the negative.

평판하 연기선단의 가시화

한용식,김명배,오광철,유상필 한국화재소방학회 2001 한국화재소방학회논문지 Vol.15 No.1

수평 평판과 충돌하는 제트에 의해 생성되는 연기유동을 관찰하기 위해 질소가스에 kerosene연기입자를 뛰워 유동장을 가시화하였다. 광원으로는 아르곤-이온 레이져 평면광이 사용되었다. Kerosene smoke의 산란 광에 의한 수직평면 상(image)과 수평평면 상을 고속 CCD 카메라와 비디오 카메라로 녹화하였으며, 얻어진 영상으로부터 연기 선단의 순간속도 및 평균속도를 측정하였다. The flow induced by a vertically impinging circular jet under a horizontal plate is investigated by visualization technique, using kerosene smoke in nitrogen gas to visualize the vortex flow and impinging flow. The light source was the sheet beam of Ar-Ion laser. The vertical and horizontal images scattering of kerosene smoke were recorded by the high speed CCD camera and the video camera. The instantaneous velocity of the smoke front were measured from the acquisited images.

스포츠센터 직원들의 인구학적 특성에 따른 직무스트레스 및 직무만족의 차이

최종삼,조용철,장순용,정석진 龍仁大學校 體育科學硏究所 2002 體育科學硏究論叢 Vol.12 No.1

This study purposes the influence of job stress upon job satisfaction of Sports Centers Employees demonstratively. I set up the employees of sports centers in Seoul and Gyeonggi Province as Population and took 300 employees in 13 sports centers using a stratified cluster random sampling. The actually used data were 278 workers except 22 employees who were judged to respond unfaithfully or to leave out some of the surveyed questions. I made a conclusion as follows through statistical analyses including reliability analysis, frequency analysis, t-test, one-way ANOVA and Scheffe's multiple range test. First, there was a statistical significance according to age, education, position, and working years in the job stress under personal characteristics and personalities of employees in sports centers. Second, there was a statistical significance according to age, education, position, and working years in the job satisfaction under personal characteristics and personalities of employees in sports centers.

CD28Ig 및 CTLA4Ig 융합단백 생산 포유동물 세포주 수립에 관한 연구

유양석,정용훈,최용,임대철,조양자 한양대학교 의과대학 1998 한양의대 학술지 Vol.18 No.2

CTLA-4, which is homologous to CD28, recognizes the same coutner-receptors B7.1 and B7.2. Although initial researches implied that these molecules may act to each other synergistically, recent data suggest that CTLA-4 may acts as a negative regulator of T cell activation. In this study human CD28 and CTLA-4 cDNAs were amplified from PHA-stimulated human peripheral blood lymphocytes mRNAs by using RT-PCR method. IgG1 Fc portion cDNA was amplified from human peripheral blood lymphocytes of patients with febrile illness and fused to C"-terminal parts of CD28 and CTLA-4 extracellular domains. The fusion constructs were subcloned into pCI-neo vector and then transfected into Sp-2/0murine myeloma cell. Stable cell lines were established by geneticin selection and cloning. In the sequence of CTLA-4 cDNA from 3 different healthy persons it was found that 2 sites of bases were different from that published in original paper and submitted to genbank database. The 49th and 331st bases of open reading frame were changed from adenine to guanine and from guanine to adenine respectively. It was confirmed that the 17th and 111th amino acid of human CTLA-4 were alanine and threonine respectively, 5 different human CTLA-4 clones with serial N'-terminal deletion were constructed. CTLA4/L_1 was intact CTLA-4 gene of native form without any form of mutation. CTLA4/L_2 was a mutatn with deletion in gene coding N'-termial 6 amino acids. CTLA4/L_3 was a mutant with deletion in gene coding N'-termial 11 amino acids. CTLA4/L_4 was a mutant with deletion in gene coding N'-termial 16 amino acids. CTLA4/L_5 was a mutant with deletion in gene coding N'-termial 22 amino acids. Level of surface expression of CTLA4Ig on L_1, L_2, L_3, L_4 and L_5 transfectant cell lines were 5%, 3%, -1.5%, 8%, and 6% respectively. These 2 fusion proteins, CD28Ig and CTLA4Ig, would be useful tools for further researches on role of the costimulations in T cell activation.