경연 대회를 통한 초ㆍ중고생의 창의력 신장 효과에 관한 연구

이희복,육근철,류해일,김현섭,김희수,박달원,유병환,김선효,김여상,서광수,변두원,서명석,배성효,박종석,심규철,이성희 공주대학교 과학교육연구소 2001 과학교육연구 Vol.32 No.1

미래 사회를 대비하기 위한 개인의 개성을 존중과 창의적인 능력을 지닌 인간을 양성을 목적으로 충청남도 지역의 초 ㆍ 중고등학생들을 대상으로 한 창의력 경연대회가 공주대학교 과학교육연구소에서 개최되었다. 충청남도 초 ㆍ중 ㆍ 고등학생들을 대상으로 실시한 창의력 경연대회는 창조적 아이디어를 내어 스스로 문제를 해결해 나갈 수 있는 교육 프로그램을 제공하는 좋은 기회였음이 확인되었으나, 일부의 팀에서만 참신하고 재미있는 아이디어들이 제안되었다. 여학생의 참가자 수가 상당히 증가하였으며, 대체적으로 입상권의 학생들의 상당 부분이 여학생이라는 것이 특이할만하다. 학년이 올라감에 따라서 창의적인 아이디어를 내는 양이나 질에 있어서 뒤떨어지는 것으로 분석되었으며, 토론 학습의 적응력이 미흡하고 발표력 및 청취력에 있어서도 떨어지는 것으로 나타났다. 따라서 중 ㆍ고등학교의 학교교육에서도 학생들에게 프로젝트형 탐구학습 프로그램의 적용은 물론 토론식 수습을 통한 학생들의 사고의 전환의 기회를 제공해야 할 것으로 사료된다. The creativity competition was held to foster the creativity of elementary and secondary school students in the Institute of Science Education, Kongju national University. It was found that the creativity competition effected on the improvement of inventing creative ideas and problem solving activities. But, only some competitors participated in semifinal and final contests, presented original and interesting ideas. More female students participated in competition than last year. More female participants were awarded a prize than males. Totally, participants were defective in discussion and communication, and presentation and listening ideas. Increasing grades correlated inversely with creativity and originality. There is need of inquiry project teaming programs and presenting opportunities of conversion of thinking by discussing instructions in school

하악에 발생된 법랑모세포 암종

김근민,황의환,조재오,이상래 대한구강악안면방사선학회 2001 Imaging Science in Dentistry Vol.31 No.2

The ameloblastic carcinoma is an extremely rare, aggressive odontogenic neoplasm of the jaws. It is described as an ameloblastoma in which there is histologic evidence of malignancy in the primary or recurrent tumors, regardless of whether it has metastasized. We report an aggressive case of ameloblastic carcinoma of the mandible. A 68-year-old man with the complaint of the left facial swelling and intermittent pain was referred to our hospital. Serial images of panoramic radiograph, computed tomograph, and magnetic resonance imaging showed an ill-defined destructive radiolucent lesion of the left mandible. The lesion had typically aggressive behavior with extensive local destruction of bone and extended to the adjacent soft tissues. Bone scan revealed increased uptakes in the left mandibular body and ramus regions. Histological features were generally resembled with those of an ameloblastoma but with cytologic features of epithelial malignancy. (Korean J Oral Maxillofac Radiol 2001;31:109-15)

난소적출 백서에서 estrogen투여가 실험적 치아이동에 미치는 영향

김오환,박병건,김정기,진근호 대한치과교정학회 1997 대한치과교정학회지 Vol.27 No.4

난소를 적출한 백서에서 실험적 치아이동 동안 치주와 치조골 조직의 반응에 대한 에스트로젠의 효과를 알아보기 위하여 체중 250gm 내외의 성숙한 백서 80마리를 난소척출한(ON)군과 난소적출하고 에스트로젠을 투여한 (OE)군, sham operation만 시행한(NN)군, sham operation을 시행하고 에스트로젠을 투여한 (NE)군으로 각각 분류하여 교정력을 가하였다. OE군과 ON군은 교정력을 가하기 3주전에 난소를 적출하여 에스트로젠 결핍성 골다공증을 유발시켰다. OE군과 NE군에서는 2일에 한번씩 에스트로젠을 50㎍/kg BW씩 복강내에 주사하였다. 치근의 압박측과 인장측의 Howship's lacuna와 파골세포수를 비교 분석하였고, 치아 이동량을 계측 분석하였으며 그 결과는 다음과 같다. 1. 교정력을 가하기 전 NN군에서 보다 ON군에서 치조골 부위에 더 많은 Howship's lacuna와 파골세포가 관찰되었다. 2. 교정력을 가한 후 1일에서 15일까지 압박측의 lacuna와 파골세포의 증가양상은 NN군에서 보다 ON군에서 더 컸으며, ON군의 lacuna수는 OE군보다 교정력을 가하는 전기간동안 높은 수치를 나타냈다. 3. 인장측의 파골세포수는 ON군에서 3일까지 급격히 증가하고 이후 감소하였으나, 전기간 동안 NN군에 비해 높은 수치를 나타냈다. 4. 치아이동 속도는 NN군, OE군, NE군에서 비슷하였고, ON군에서 7일에서 11사이에 다른 군에 비해 뚜렷한 증가를 보였다. 5. 교정력 제거 후 7일간 재발을 관찰한 결과 처음 12시간이 가장 큰 재발 이동량을 나타냈으며, 모든 군에서 유사한 양의 재발을 보였다. The purpose of this study was to evaluate the effect of estrogen on the periodontium and alveolar bone tissue response during experimental tooth movement in ovariectomized rats. Eighty female rats, 250gm in body weight, were classified into four groups; sham operated group(NN), ovariectomized before 3 weeks to begin the experiment, which resulted in estrogen-deficient osteoporosis. In OE group & NE group, estrogen was injected 50㎍/kg BW. every other days. The left maxillary 1st molar was moved mesially with 60g force. Each four rats were sacrificed after 1,3,5,15 days from application of orthodontic appliance and after additional 7days from removal of orthodontic appliance. Histological findings on mesial roots of upper 1st molar in pressure and tension side are observed. The results were summarized as follows; 1. In pressure side of alveolar bone, the number of osteoclasts and Howship's lacuna of ON group was significantly more than that of NN group from 1 day to 15 days(p<0.05). Especially the number of Howship's lacuna of ON group was significantly more than that of OE group during all experimental period(p<0.05) 2. In tension side of alveolar bone, the number of osteoclasts of ON group was significantly increased from 1 day to 3 days and decreased after 7 days. But the number of osteoclast of ON group was significantly more than that of NN group during all experimental period(p<0.05). Also the number of Howship's lacuna of all groups was abruptly increased at 1 day, but slowly decreased till experimental 15 days. And the number of Howship's lacuna of ON group was significantly more than that of NN group from O hr to 7 days(p<0.05) 3. The speed of tooth movement of OE group & NE group was similar to that of NN group(p>0.05). The amount of tooth movement of ON group between 7 days and 15 days was significantly greater than those of other groups(p>0.05). 4. The degree of relapse of ON group after 7 days from removal of orthodontic appliance was similar to those of other groups(p>0.05).

남원시 생활하수가 요천 수질오염에 미치는 영향에 관한 연구

김환기,김태근,이영우 全北大學校 附設 都市및環境硏究所 1995 都市 및 環境硏究 Vol.10 No.1

The Yo stream(drainage area: 526.08㎢, length: 52.0㎞) is one of the branchs of the Seom Jin river. In order to evaluate effects of the sewage in Nam-Won City(I) on the water pollution of the Yo stream, water qulity analysis and estimate the pollutant discharge rate were carried out at six sites in the Yo stream basin from December 1994 to September 1995. The results of research are summarized as follow: 1. According to the water quality of six sites evaluated by BOD, ST1 is classified into I grade, ST2 and ST3 are II grade, ST4∼ST6 sites are III grade. 2. Amount of total BOD load from the Yo stream basin was estimated 11,810㎏/day of which 13.9% was contributed by land, 0.1%, was contributed by industrial waste water, 43% was contributed by population and livestock, respectively. 3. As Nam-Won city(I), discharge rate and effluence rate of BOD, SS were estimated 28.4%, 10.6% and 20.6%, respectively. 4. Since Nam-Won city sewage treatment plant started operation, BOD, SS reduction rate of Nam-Won city(I) were forecasted 36.1% and 20.6%, respectively.

PC에 의한 재래식 NC 선방의 DNC화

김근태,정선환,노승훈 金烏工科大學校 1991 論文集 Vol.12 No.-

The key feature of any DNC System is the on-demand supply of parts program data to a number of NC machine tools. Usually DNC Systems are based on the main frame computers or mini computers. This paper describes the design philosophy and the implementation of a PC-based Low-Cost-DNC system of a conventional NC Lathe which was made in the early 1970s.

척수 손상 환자에서의 Euthyroid Sick Syndrome -증례 보고-

서정환,고명환,김근수,김연희 大韓再活醫學會 1998 Annals of Rehabilitation Medicine Vol.22 No.2

서중조건하에서의 콘크리트 충전 강관 기둥의 시공을 위한 실험적 연구

이장환,강용학,정근호,김진호,최문식,정상진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

The basic Physical properties, Slump, Slump flow, Air content, Bleeding, and Settlement of concrete was investigated to test Characteristic of Setting and to evaluate the relation between Model specimen and Heat of hydration for construction Over the High Temperature(CFT). The objective of this study is to take the partial core after the cementation of Model specimen, test the compression intensity and analyze the relation to Test piece.

노안수술후 각막형태검사 변화

박근성,고길환,김용선,이재림,민병무,최시환 충남대학교 의학연구소 2001 충남의대잡지 Vol.28 No.2

We prospectively analyzed the corneal topography of 26 eyes in 26 patients who had undergone scleral expansion for correcting presbyopia. We examined 26 eyes of 26 patients which were devided into 2 groups (mean age: 51 years, range 40-60 years) according to type of scleral expansion band, with computerized corneal topographic analysis system. Preoperatively and 5 times postoperatively (1day, 1week, 2weeks, 1month, 2months), quantitative descriptors of corneal topograpgy such as Sim K (simulated keratometry value), SRI(surface regularity index), and SAI(surface asymmetry index) were measured at each visit. The mean follow-up period was 43 days. Sim K of the operative eyes ranged from 0 to 2.5 (mean, 0.93) before operation, and mean 2.24 at postoperative 1 day in group Ⅰ. In group Ⅱ, Sim K was mean 2.20 at postoperative 1 day and decreased thereafter. SRI was from 0.54 to 1.39 and SAI was from 0.09 to 0.45 before operation. After operation, mean SAI was maximum at postoperative 2 week and mean SRI was maximum at postoperative 1 day and decreased thereafter. After two months, it became minimum. This study demonstrates that quantitative topographic change after scleral expansion for correcting presbyopia were great during first 1 week after surgery but this change diminished thereafter. Further long studies are in progress to evaluate the long term effects of this procedure.

Mitomycin-C 적용시간에 따른 누낭비강연결술의 수술결과

박근성,임진호,민병무,최시환,김창식,김용백 충남대학교 의학연구소 2001 충남의대잡지 Vol.28 No.2

To determine the usefulness of application of Mitomycin-C (MMC) and effectiveness of different concentration of MMC in external DCR. A total of 100 eyes of 87 patients diagnosed with primary acquired nasolacrimal duct obstruction were assigned randomly to either a MMC group or control group. The surgical procedures in both groups were same. In MMC group, a piece of neurosurgical cottonoid soaked with 0.4 mg/ml MMC was applied to the osteotomy site and then was removed after 5 and 10 minutes differently. Nasoendoscopic examination was performed at 1 month, 3 months, and 6 months after surgery for all patients. The causes of epiphora as trauma (20 cases), failed DCR (1 case), sinus surgery (2 cases), unknown (77 cases). The overall anatomical success rate of the procedure was 88% and functional success rate was 79%. Obstruction site was related to anatomical surgical results. Anatomical surgical outcome at lower lacrimal sac level group of patients showed a statistically significant success rate, but functional surgical outcome showed no significant difference between the two groups. The anatomical success rate was 87.7% and the functional success rate was 84.2% in MMC group. The anatomical success rate was 88.3% and the functional success rate was 74.4% in control group. Application of MMC and it's application time were not related to surgical results.

병렬기법을 이용한 RICS 프로세서용 고속 레지스터 파일 설계

박형근,김형균,김환용 圓光大學校大學院 1996 論文集 Vol.17 No.-

Modular memory is an essential component of any digital 1C design library. The major application of high speed register file has been as the main memory of large-scale computers, super computer, microcomputer, workstation, so on. So, in this thesis, The designed high speed register file for RISC processor, which is possible to processing concurrent I/O by seperating read/write bitline and word access TR has become one of the key embedded elements for processor VLSI's, because it allows simultaneous access from multiple resource and the parallel operations yield a high system throughput. Benefits include reduced constraints on the client units and simpler register to register programming models. Stable output characteristics was obtained by testing at peripheral circuits of operation and was designed by using 1.2[μm] CMOS design rule.