초·중학생들의 과학탐구능력 측정도구의 개발

권재술,김범기 한국교원대학교 과학교육연구소 1994 청람과학교육연구논총 Vol.4 No.1

There are a considerable number of instruments in testing science process skills in Korea as well as America and Europe. However, it has been difficult to find the instruments encompass the wide range of scientific process skills. Most instruments developed and used in Korea were focused on a school level or a few components of scientific process skills. In this study, the researchers examined the whole body of scientific process and identified 10 component skills. Three items for each component process skills were developed and revised by two pilot tests. The final instruments showed moderate difficulty, discrimination index, reliability, and validity. The instrument was also tested the usability by finding differences of students' ability on science process skills by grade levels, sexes, and city size. The results showed that the instrument was proved to be useful to discriminates the differences.

Pattern Search를 이용한 축구전용 경기장의 최적의 조명기구 위치 산정

權炳徽,崔棅淑,徐梵寬 홍익대학교 산업기술연구소 2003 産業技術 Vol.13 No.-

One essential contribution to a successful soccer game, which is still not always recognised as such, is the standard and quality of the lighting system. This is not only for TV transmissions, but also for the general practising of the sports. But, on too many occasions, sport activities and events have been allocated with insufficient or Inappropriate lighting system. inadequate lighting spoils not only the pleasure and the interests of active sportsmen, but also the comfort of the spectators in both the stadium and at home watching their TV. So this paper newly proposes the algorithm for searching of luminaire position which can be applied to the design stage.

첨가제에 따른 도시폐기물 소각 Fly Ash의 고형화/안정화 특성

이범재,권영배,김태동 안동대학교 환경연구소 2001 환경연구 Vol.1 No.-

In treatment of hazardous wastes like fly ash, landfill has been generally the most economical and easy method of treating this waste in Korea. But there is a stringent restriction on landfill because soil and groundwater contamination is occurred by the leachate from landfill materials. Modified stabilization/solidification technology, to solve these problems in landfill and melting processes, is researched with which we can stabilize heavy metals in solidified matrix. Objectives of this study are development of S/S process technology for stabilization of pollutants in hazardous wastes, and determination of the optimum additives and their mixing ratio for increasing the physical propriety of solidified matrix and reducing the pollutants leaching concentrations. The results of this study are as follows; Solidified matrix' proprieties such as heavy metals leaching concentrations and compressive strength were improved when slag and rice husk ash were used such as pozzolan materials and added additives as sorts of aluminate, sulfate and silicate chemicals. In the case of HS fly ash, when 5% sodium silicate and 10% cement were used as additives, compressive strength was over 90 kgf/㎠ in 28 the curing days and when sodium silicate and slag were added, heavy metal leaching concentrations were under the criteria in the 7 curing day. In the case of KM fly ash, the physico-chemical proprieties (compressive strength of solidified matrix and heavy metal leaching concentrations) were improved over 150 kgf/㎠ in 28 curing days by the additives like slag and rice husk ash (pozzolan materials) and sorts of aluminate, sulfate, silicate, etc.

기본블럭 내에서의 마이크로프로그램 컴팩션에 관한 연구

조범석,남재현,권기호 명지대학교 공학기술연구소 1987 공학기술연구소 논문집 Vol.2 No.-

In this paper, microprogram compaction algorithm that can reduce executive time & control memory is proposed. The proposed algorithm considers data dependency and resource confrict of micro-operations in a basic block and minimizes the number of microinstruction. Examples shows that this method can minimize the more number of microinstruction than that of FCFS[4] method.

과학개념과 인지적 갈등의 유형이 학생들의 개념변화에 미치는 영향

김범기,권재술 한국교원대학교 과학교육연구소 1995 청람과학교육연구논총 Vol.5 No.1

The purpose of this study was to classify the types of scientific concepts by theoretical concepts and empirical concepts in physics, and to create cognitive conflict in students with logical statements and demonstrations, and to investigate conceptual changes. It seems that mechanics has much to do with the empirical concepts, and electromagnetics has much to do with the theoretical concepts. The condition of the instrument is intellegible, plausible, fruitful, and able to state and demonstrate. The instrument appropriate for these conditions was developed, which consisted of 6 items in mechanics and 6 items in electromagnitics, and conceptual changes were investigated. Structured interviews were conducted with 32 high school students to create cognitive conflict. We have elicited their ideas three times: pretest, posttest and delayed posttest. As the results of this study, demonstration method was more effective for conceptual change than logical argument method. In case of content areas, the misconceptions on mechanics concepts were changed more easily than those on electromagnetics concepts. In addition, the results of the study showed that the more cognitive conflict, the more the conceptual change was occurred.

2차원 및 3차원 초음파를 이용한 태아표면의 해부학적 선별 검사에 관한 연구

윤석범,이해혁,이정재,최경훈,이순곤,이임순,이권해 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2

Objective : Our purpose of this study was to determine the clarity and consuming time of fetal surface screening in thirty-eight fetuses from 24 to 32 weeks of gestation by use of two and three-dimensional ultrasonography. Methods : From May 1998 to July 1998, we performed the fetal surface screening of the fetal face, extremities, and spine. Thirty-eight fetuses of 24-32 weeks of gestation (thirty-seven normal fetuses and one abnormal fetus) were studied by use two-dimensional (AI 5200S, 3.5-5.0MHz; Acoustic Imaging Technologic Cooperation, U.S.A.) and three-dimensional ultrasonography (Volusion 530D, 3.5-5.0 MHz ; Kretz-Medicine, Korea). On the fetal face, we evaluated both orbits, nose, lips and brow. Both hands and feet, five digits and toes should be seen in this study. We evaluated cervical spine and lumbosacral junction of the spine. Results : The maternal average age of 38 patients was 29.9 years and the average gestational age was 29.7 weeks. The results of fetal surface screening were as follows : face (both orbits 89.5%, lips 92.1%, nose 92.1%, and brow 89.5%), extremities (both hands 68.4% and feet 73.7%), and spine (cervical spine 94.7% and lumbosacral junction 97.4%) by use of two-dimensional ultrasonography. By use of three-dimensional ultrasonography, results were as follows : face (both orbits 76.3%, lips 81.6%, nose 81.6%, and brow 78.9%), extremities (both hands 76.3% and feet 78.9%), and spine (cervical spine 71.1% and lumbosacral junction 73.7%). Consuming time for two-dimensional ultrasonography were 4.7 minutes for face, 11.6 minutes for extremities, and 5.7 minutes for spine. Using three-dimensional ultrasonography results were 12.8 minutes for face, 17.9 minutes for extremities, and 11.7 minutes for spine. Average consuming time of all fetal anatomic screening was 22.0 and 42.4 minutes by use of two and three dimensional ultrasonography. In one abnormal fetus had cleft lip and polydactyly of right foot which were detected all by three-dimensional ultrasonography, but we couldn't detect the polydactyly by two-dimensional ultrasonography. Conclusion : Three-dimensional ultrasonography was more time-consuming method, but we suggested that three-dimensional ultrasonography was superior than two-dimensional ultrasonography in fetal surface screening.

조갑-슬개골 증후군 1예

김범준,윤호준,원종현,이종희,권오상 대한피부과학회 2006 大韓皮膚科學會誌 Vol.44 No.4

소리에 대한 국민학교 학생들의 개념

김한호,권재술,김범기 한국교원대학교 과학교육연구소 1994 청람과학교육연구논총 Vol.4 No.1

The purpose of this study was to investigate Korean children's(1∼5th) conceptions about sound: the production of sound, the transmission of sound. Using interview, data were collected from 80 children, and analysed by category schemes. The major findings of this study were as follows: 1. Younger children thought that sound production was often attributed to the impact or to the properties of the object. 2. Sound transmission was not an idea which was expressed by many children. Some children considered sound to travel through the string on the string telephone, or through air, but what was meant by 'air' was often unclear. Somtimes, they regarded sound as a different kind of matter. 3. A notable feature in children's conceptions on sound was context-dependent.

빛에 대한 국민학교 학생들의 개념조사

김한호,정진우,최병순,김범기,권재술 한국교원대학교 과학교육연구소 1993 청람과학교육연구논총 Vol.3 No.1

The purpose of this study was to investigate children's(K-5) conceptions about light in Korea. The two aspect of children's conceptions about light were identified: the sources of light, the nature of vision. Data were collected from 92 children by a mixture of writing, drawing and interview, and were analysed by systematic networks. The major findings of this study were as follows: 1. Children showed an awareness of a wide variety of sources of light. The predominant sources exampled by children were primary sources. 2. Children explained vision as intentional actvivty of seeing Seeing. means action that move their heal or eyes to the objects. Infants(K-1) did not recognize that light are needed for vision. 3. A notable features in children's conceptions about light were context-dependent

빛에 대한 국민학교 학생들의 개념조사

김한호,권재술,김범기,정진우,최병순 한국교원대학교 과학교육연구소 1992 청람과학교육연구논총 Vol.2 No.1

The purpose of this study was to investigate children's(K-5) conceptions about light in Korea. The two aspect of children's conceptions about light were identified: the sources of light, the nature of vision. Data were collected from 92 children by a mixture of writing, drawing and interview, and were analysed by systematic networks. The major findings of this study were as follows: 1. Children showed an awareness of a wide variety of sources of light. The predominant sources exampled by children were primary sources. 2. Children explained vision as intentional of seeing Seeing. means action that move their heal or eyes to the objects. Infants(K-1) did not recognize that light are needed for vision. 3. A notable features in children's conceptions about light were context-dependent