STAD 수업모형을 활용한 수학수업에서 인지적·정의적 영역의 변화 연구

기명진,강순자 全南大學校 師範大學 科學敎育硏究所 2008 科學敎育硏究誌 Vol.32 No.1

The purpose of this study is to examine how STAD(Student Team Achievement Division) model, one of cooperative learning methods, affects the academic achievement of students in mathematics and their mathematical attitude and to provide both teachers and learners with useful information. For this study we selected 56 students from an academic high school in Jangheung-eup, Jeolla province. The high school juniors were enrolled in two different classes between which there was no significant difference in academic achievement and mathematical attitude, and each class had 28 students. One of them was selected as an experimental group to which the STAD model was applied, and the other was selected as a control group that received education according to a typical expository instructional model. After the experimental teaching was completed, whether there was any significant intergroup gap in academic achievement and mathematical attitude was checked, and then the experimental group was investigated to find out about the strength and weakness of the STAD model.

용기의 크기가 養液栽培 오이의 生長과 收量에 미치는 影響

鄭淳柱,李範宣,朴順基,金光秀 全南大學校 農業科學技術硏究所 1998 農業科學技術硏究 Vol.33 No.-

본 연구는 perlite를 이용한 오이의 양액재배시 적정 배지량과 근권용적을 구명하고자 용기의 크기가 2, 4, 6, 8 및 10ℓ인 플라스틱 포트에 펄라이트를 채워 오이를 양액재배하였다. 근권용적이 증가할수록 초장, 경경, 엽수 및 엽면적이 증가하였고, 과실수와 과실중량에서는 근권용적이 큰 8ℓ와 10ℓ의 처리구에서 가장 양호하였으며 기형과 발생률도 낮은 경향이었다. 근권용적 6ℓ이상으로 하였을 때 경으로의 건물분배가 줄어들고 엽으로의 건물분배가 많았다. NAR과 CGR은 근권용적이 증가함에 따라 증가하는 경향을 보였다. 근권용적에 관계없이 본 실험 범위내에서는 LAI가 증가할수록 NAR과 CGR도 증가하는 경향을 나타내었다. This experiment was carried out to investigate the effect of container size and substrate volume on the growth and fruit yield of hydroponically grown cucumber(Cucumis sativus L.) plant. Seeds were sown in plug tray filled with coir dust on Feb. 13, 1998. Seedlings with 5 to 6 true leaves were transplanted in 2l, 4l, 6l, 8l and 10l plastic pots filled with perlite medium. Cucumber fruits were harvested with 1 to 2 day interval, and fresh weight, number and malform of fruit were recorded. Plant height, stem diameter, number of leaves and leaf area highly depended on the container size. Total fresh weight and the number of fruit were increased as the container size increased. NAR(net assimilation rate) and CGR(crop growth rate) increased with increasing the container size. Optimum container size for hydroponically grown cucumber plant using perlite medium was recommended as 8l per plant.

GIS와 RS를 이용한 생태지도 작성기법에 관한 기초연구

이기철,이원화,윤해순,남춘희,김구연,김승환,서상현 한국지리정보학회 2004 한국지리정보학회지 Vol.7 No.3

본 연구는 낙동강 하구 일대의 생태계 변화와 생태 관련자료를 GIS DB로 구축하고 생태지도를 작성하였다. 생태지도 작성을 위해 1984년 11월 21일, 1997년 5월 17일에 촬영된 공간해상도 30m의 Landsat TM 위성영상과 국립지리원에서 발행된 1:25,000 수치지형도, 부산시에서 조사한 생물현황 자료를 바탕으로 DB를 구축하였다. 생태지도를 작성하기 위해, 첫째, 낙동강 하구 생태계 조사 보고서와 현재까지 진행된 생태지도에 대한 문헌 연구, 둘째, 시계열적 토지피복분류도 제작, 셋째, 동·식물상, 수질 등 생태계 항목별 BB 구축과 3단계 방식에 의한 생태계 평가, 최종적으로는 이러한 분석 결과를 바탕으로 생태계 관리를 위한 생태지도를 작성하였다. This study developed an ecological mapping technique with GIS database using the analyses of existing ecological survey reports and the change detection on the Nakdong river estuary. The data which are used to establish GIS DB include 2 Landsat TM images on Nov. 31, 1984 and May 17, 1997, 1:25, 000 topographical maps established by National Geography Institution and various ecological survey reports published by Busan metropolitan city government. The details for producing ecological map are as follows. At first, the current methods of ecomapping efforts and previous ecological surveys of Nakdong river estuary were carefully examined. Secondly, the land cover maps were created from the classified Landsat images of 1984 and 1997 for the spatiotemporal ecosystem analysis. Thirdly, the ecosystem was evaluated by using GIS ecological database based on the criteria of botany, zoology and water quality etc. Each criteria was reclassified into 3 stages which describe the overall quality of ecological condition. At last, the comprehensive ecological map was suggested as a prototype of ecosystem assesment and management tool with the discussion of further study. The findings of this study would be a milestone for preserving and managing the ecosystem.

레이저에 의해 손상된 치아경조직 및 치수조직의 치유과정에 대한 연구

김철순,민병순,최호영,박상진,최기운 大韓齒科保存學會 1998 Restorative Dentistry & Endodontics Vol.23 No.1

탄화물첨가 TiC기지 서멧의 결정립 성장에 대한 정량적 고찰

김순호,신순기 신라대학교 자연과학연구소 2003 自然科學論文集 Vol.11 No.-

The growth of solid particles in TiC-XC-2vol.% and TiC-XC-30vol.% Ni alloys, (where X=Zr, W or Mo) were fitted to an equation of the form d^3-d_0^3=Kt. The grain growth behavior during liquid phase sintering at 1,673K decerased markdedly with addition of Mo_2C or WC and incerased with addition of ZrC. The contiguity decerased with increasing Ni content in the TiC-Mo_2C-Ni alloy and was greater in the alloys with smaller growth rate constant. Conseqently, the effect of carbide addition on the grain growth of 2 vol.% Ni alloys was fond to be similar to that of 30 vol.% Ni alloys. The grain growth mechanism ould be explained in terms of a new growth velocity equation, K_T=(1-C_r)[α^3/{1-(1-V_L)^(1/3)}][8γ_(sl) Ω^2DC_0/9RT]+C_rK_c, which includes the effect of con-tiguous carbide grain boundaries in restricting the overall grain growth, as well as the area of the soild / liquid interfaces in the alloy by the usual solution / reprecipitation model.

方藥合編에 收錄된 本草의 分類 : Entries in the part of Herbs

박순경,문성기 慶星大學校 1998 論文集 Vol.19 No.2

본 硏究는 方藥合編에 수록된 본초목록 189품목에 대해 기원식물을 밝혀 Engler 분류체계로 정리한 결과는 다음과 같다. 1. 189품목의 기원식물은 174종이었으며 이는 5문 9강 4아강 43목 73과 147속 151종 22변종 1아종으로 분류되었다. 2. 문별로 보면 Angiospermae(피자식물문)는 162종(93.11%)이며 그중에서 Monocotyledoneae(단자엽식물강)가 86종(49.43%), Dicotyledoneae(쌍자엽식물강0가 76종(43.68%)이었다.그외 Pteridophyta(양치식물문)가 6종(3.45%), Phaeophyta(갈조식물문)가 4종(2.30%), Gymnospermae(나자식물문)가 1종(0.57%), Chlorophyta(녹조식물문)도 Codium fraile(SUR)HAR (청각) 1종(0.57%)뿐이었다. 3. 방약합편의 본초목록 조사품목 중 29품목은 14종의 식물로 동일기원으로 정리되었다. Among the 189 articles recorded in the part of Herbs(草部), 174 kinds of original plants were identified. These 174 kinds of original plants were classified into 5 divisions, 9 classes, 4 subclasses, 43 orders, 73 families, 147 genera with 151 species, 22 varieties, 1 subspecies. In the comparisons of divisions, Angiospermae was the most numerous division with 162 kinds(93.11%), the next division was Pteridophyta with 6 kinds(3.45%), Gymnospermae 1 kind(0.57%) and Chlorophyta 1 kind(0.57%).

大氣電荷와 그 作用에 關한 硏究

趙順基 명지대학교 1979 明大論文集 Vol.12 No.-

大氣中에는 여러 가지 原因에 의하여 많은 荷電粒子가 생긴다. 이렇게 생긴 荷電粒子인 이온은 쌓이고 쌓여서 地球表面上의 大氣는 하나의 電氣場(Electric field)이 形成된다. 이 電氣場은 電位傾度(Potential gradient)가 약 120volt/m정도임이 實測된다. 이 結果로 大氣와 地表間에는 電流가 흐르게 된다. 이러한 大氣中의 電氣場의 分布는 生物體에 여러가지 影響을 줄 것이다. 이 論文에서는 이 大氣電荷가 特히 植物에 미치는 作用에 對하여 檢討하고 硏究하였다. 實驗한 結果에 의하면 花盆을 接地하였을 때 한 植物의 成長에 比하여 接地하지 않고 空中에 놓은 花盆에서 그의 成長은 約 30%정도 低下함이 나타났다. A study on the Electric field of the atmosphere and its action. A number of charged particles are formed in the air owing to the various reasons. The ions which are formed in such a way accumulate in the air, and thus the atmosphere on earth surface form an electric field. The potential gradients of this electic field are measured about 120 volts/m. In this paper, it was studied and discussed that the plant life has been effected by the action of electric charge in the air. The result showed that an earthed pot had accelerate the soybean root,i.e.the growth of a soybean root planted in an earthed pot increased by 30% more than that of it planted in a pot hung in the air.

댄스스포츠 정착을 위한 체계 확립의 필요성에 대한 제언

백순기 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

DanceSport in Korea gets a firm stand to Olympic Medal Programme Sport by approval of Korean Federation of DanceSPort(KFD) from Korea Sports Council(KSC) and Korean Olympic Council(KOC). Therefore, it seems necessary to improve continuously culture, art, and education values, and sport culture. It requires system establishment in order to found dance sport in Korea. Hereupon, this study comments on requirement of system establishment. it requires right studies and system establishment about dance sport influence, education and train instructors from now on. It also requires to alter the social cognition of dance sport, and establish positive parts as a substitute medicine, and competitive sport.

치과병원에서 사용되는 진단영상에 대한 JPEG 2000 압축률에 대한 평가

정기훈,한원정,유동수,최순철,김은경 대한구강악안면방사선학회 2005 Imaging Science in Dentistry Vol.35 No.3

Purpose : To find out the proper compression ratios without degrading image quality and affecting lesion detectability on diagnostic images used in dentistry compressed with JPEG 2000 algorithm. Materials and Methods : Sixty Digora periapical images, sixty panoramic computed radiographic (CR) images, sixty computed tomographic (CT) images, and sixty magnetic resonance (MR) images were compressed into JPEG 2000 with ratios of 10 levels from 5 : 1 to 50 : 1. To evaluate the lesion detectability, the images were graded with 5 levels (1: definitely absent; 2: probably absent; 3: equivocal; 4: probably present; 5: definitely present), and then receiver operating characteristic analysis was performed using the original image as a gold standard. Also to evaluate subjectively the image quality, the images were graded with 5 levels (1: definitely unacceptable; 2: probably unacceptable; 3: equivocal; 4: probably acceptable; 5: definitely acceptable), and then paired t-test was performed. Results : In Digora, CR panoramic and CT images, compressed images up to ratios of 15 : 1 showed nearly the same lesion detectability as original images, and in MR images, compressed images did up to ratios of 25 : 1. In Digora and CR panoramic images, compressed images up to ratios of 5 : 1 showed little difference between the original and reconstructed images in subjective assessment of image quality. In CT images, compressed images did up to ratios of 10 : 1 and in MR images up to ratios of 15 : 1. Conclusion : We considered compression ratios up to 5 : 1 in Digora and CR panoramic images, up to 10 : 1 in CT images, up to 15 : 1 in MR images as clinically applicable compression ratios.

개선된 신경망 적응제어기를 이용한 비선형 적응제어기 설계

이병기,이순영 경상대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.16 No.-

In this paper, a new algorithm for a neural network adaptive tracking control scheme to improve performance is prosed. In supervisory control scheme, the upper and lower bound of the parameters are directly estimated by using RBF neural network without their information, and the weighting parameters of the control input are adjusted on-line by adaptation laws. As a result, the proposed algorithm assures that the output errors go to zero without relation to existing minimum approximation errors and disturbances. The effectiveness of the proposed algorithm is demonstrated through the simulation of one-link rigid manipulator.