경연대회를 통한 초·중고생의 창의력 현황에 관한 연구

육근철,이희복,류해일,김현섭,김희수,박달원,심규철,박종석,신영숙,박상태,변두원,김태균 공주대학교 과학교육연구소 2002 과학교육연구 Vol.33 No.-

21세기의 정보화 산업사회와 지식기반 사회에서 우리의 아이들이 자신의 목소리로 세계 속에서 살아가게 하기 위해서는 다른 사람과 다른 아이디어를 낼 수 있도록 교육의 틀을 바꾸지 않으면 안된다. 다라서 21세기의 미래 사회를 살아갈 학생들을 가르치는 교육의 현장 역시 창의적인 인간을 길러낼 수 있도록 변해야 한다. 즉, 미래 사회를 대비하기 위해서는 각 개인의 개성을 존중하는 분위기에서 창의적인 능력을 지닌 인간을 양성해야 한다는 것을 의미한다. 따라서, 학교 안에서의 교육뿐만이 아니라 학교 밖에서도 다양한 학습 경험을 통해서 교육 과정이 추구하는 인간상을 구현할 수 있도록 활동할 수 있는 기회가 학생들에게 제공되어야 한다. 창의력을 발휘하여 문제를 해결하는 능력을 기르기 위해서는 개별적이 아닌 여러 명의 동료가 주어진 과제를 해결할 수 있는 기회를 갖고 짧은 시간이 아닌 장시간 동안 고민하고 그 해결책을 찾는 활동을 가질 기회가 필요하다. In order to educate our students with their special talents for the informational and knowledge based age expected in the 21st century, we must improve our educational programs such that students are able to create their own fresh ideas. Hence the present educational environment should be changed such that they are willing to respect others' characters and personality with their own original ideas. Therefore, we must make them have the opportunity that they can acquire many experiences through the school education and the social education program, so that they may grow up to the person with the humanity and creativity. In this study we have suggested new educational program where students engage themselves in long term research projects with collaboration of the team and creativity of individuals.

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

철근콘크리트 휨부재의 피로특성에 관한 실험적 연구

김영진,노병철,장세창,변근주 연세대학교 산업기술연구소 1991 논문집 Vol.23 No.2

In recent years, considerable interest has developed in the fatigue strength of reinforced concrete members subjected to cyclic loading for the wide-spread adoption of ultimate strength design procedures, the higher strength materials and the new recognition of the effect of repeated loading on structures such as bridges, concrete pavements and offshore structures. In this study, a series of experiments is carried out to investigate the fatigue characteristics of deformed bars and underreinforced simply supported beams, The 69 reinforcing bar specimens with grade SD30 and designation of D16, D22, D25, and 24 beam specimens with D16 bars are prepared for this study. From these series of tests, it is found that ⅰ) the decrease of the bar diameter results in increased fatigue life, ⅱ) the fatigue life of the bars embedded as main reinforcement within a concrete is longer than that of bars in the air. ⅲ) the fatigue strength of beams at ?? cycles with steel ratio of 0.61% and 1.22% is 64.5% and 63.2% of the yielding strength, respectively. It is concluded that the low steel ratio has no significant effect on fatigue strength of underreinforced beams and the fatigue life underreinforced concrete beams can be predicted conservatively by the fatigue life of reinforcing bar.

解放後 濟州硏究槪觀(Ⅲ) : 社會科學分野

金榮敦,高南旭,夫萬根,申幸澈,金泰保,許鐵洙 제주대학교 탐라문화연구소 1985 탐라문화 Vol.0 No.4

치과주조용합금의 물성에 관한 비교연구

김철위,이용근 大韓齒科器材學會 1992 대한치과재료학회지 Vol.19 No.1

The purpose of this study was to evaluate the characteristics of five gold-silver-palladium alloys, six H.E dental casting alloys, three dental casting nickel-chromium alloys, four porcelain metals and four dental casting cobalt-chromium alloys being used in Korea. The following properties were studied: Vicker's hardness, ultimate tensile strength, elongation rate, melting temperature and yield strength. These tests were performed according to the KDA Specification No. 6: Dental casting cobalt-chromium alloys, KSP 5101: Dental nickel-chromium alloy plate, RANSI/ADA Specification No. 5: Dental casting alloys, RANSI/ADA Specification No. 14: Dental base metal casting alloys, JIS T 6101: Dental casting gold-silver-palladium alloys, JIS T 6102: Dental nickel chromium alloy plate, ISO Specification No. 1562: Dental casting gold alloys and FDI Specification No. 7: Dental casting gold alloys. From the experiments, the following results can be drawn: 1) In case of the dental casting gold-silver-palladium alloys, the Vicker's hardness number was VHN 171 to VHN 229, the ultimate tensile strength was 633.1 ±148.5 MPa to 771.9 ±29.5 MPa, the elongation rate was 19.7% to 23.3%, the yield strength was 616.0+141.3 MPa to 751.0±20.4 MPa and the melting temperature range was 937℃ to 1,221℃. 2) In case of the H.E dental casting alloys, the Vicker's hardness number was VHN 120 to VHN 234, the ultimate tensile strength was 329.4 MPa to 681.5 MPa, the elongation rate was 14.0% to 38.9%, the yield strength was 304.9 MPa to 820.1 MPa and the melting temperature range was 899℃ to 1,125℃. 3) In case of the dental casting nickel-chromium alloys, the Vicker's hardness number was VHN 77 to VHN 106, the ultimate tensile strength was 473.6 ±34.0 MPa to 501.7 ±31.7 MPa, the elongation rate was 16.11% to 75.36% and the yield strength was 430.1 ±40.8 MPa to 450.9 ±48.6 MPa. 4) In case of the dental porcelain alloys, the Vicker's hardness number was VHN 206 to VHN 300, the ultimate tensile strength was 784.3 ±12.1 MPa to 1,114.8 ±24.5 MPa, the elongation rate was 20.40% to 39.10% and the yield strength was 749.2 ±11.3 MPa to 1,049.7 ±23.6 MPa. 5) In case of the dental casting cobalt-chromium casting alloys, the Vicker's hardness number was VHN 155 to VHN 266, the ultimate tensile strength was 671.8 ±339.8 MPa to 876.8 ±26.2 MPa, the elongation rate was 16.77% to 24.46% and the yield strength was 676.1 ±295.0 MPa to 841.7 ±34.6 MPa.

방사능 누출 사례일의 국내·외 라그랑지안 입자확산 모델링 결과 비교 : Internal Versus Foreign Modeling Results on the Nuclear Spill Event

김철희,송창근 한국대기환경학회 2003 한국대기환경학회지 Vol.19 No.3

A three-dimensional mesoscale atmospheric dispersion modeling system consisting of the Lagrangian particle dispersion model(LPDM) and the meteorological mesoscale model(MM5) was employed to simulate the transport and dispersion of non-reactive pollutant during the nuclear spill event occurred from Sep. 31 to Oct. 3, 1999 in Tokaimura city, Japan. For the comparative analysis of numerical experiment, two more sets of foreign mesoscale modeling system; NCEP(National Centers for Environmental Prediction) and DWD(Deutscher Wetter Dienst) were also applied to address the applicability of air pollution dispersion predictions. We noticed that the simulated results of horizontal wind direction and wind velocity from three meteorological modeling showed remarkably different spatial variatioms, mainly due to the different horizontal resolutions. However, the dispersion process by LPDM was well characterized by meteorological wind fields, and the time-dependent dilution factors(X/Q) were found to be qualitatively simulated in accordance with each mesoscale meteorolocal wind field, suggesting that LPDM has the potential for the use of the real time control at optimization of the urban air pollution provided detailed meteorological wind fields. This paper mainly pertains to the mesoscale modeling approaches, but the results imply that the resolution of meteorological model and the implementation of the relevant scale of air quality model lead to better prediction capabilities in local of urban scale air pollution modeling.

상아질 결합제의 결합력에 관한 연구

김명국,백기석,이용근,김철위 大韓齒科器材學會 1994 대한치과재료학회지 Vol.21 No.1

In this study, the shear bond strength of dentin bonding agents to the extracted dentin surface was measured. Six kinds of dentin bonding agents and nine kinds of dental composite resins currently used in Korea were studied. Extracted premolar or molar tooth was embedded in acrylic resin and one of the nonocclusal surface of the crown was exposed by grinding. The exposed surface was polished up # 600 silicone carbide paper and the specimen was soaked in Fusayama's artificial saliva more than 24 hours. After the exopsed dentin surface was air-dired in the case of dry technique and blotted with tissue paper softly in the case of wet technique, dentin bonding agent was applied and dental composite resin packed in gelatin capsule was bonded on it. The specimens were stored in 37℃ Fusayama's artificial saliva for 24 hours and then the attached composite resin nodule was detached with Instron Universal Testing Machine with the cross-head speed of 0.2 mm.min. From the experiment, the following results were obtained : 1. The shear bond strength of AB2 to the extracted dentin was 8.6112.23 MPa and those values were not significantly different depending on the composite resins attached (p>0.05) 2. The shear bond strength of DH2 was 7.9314.17 MPa, and that of SC2 was 9.75∼15.13 MPa. With these dentin bonding agents, the shear bond strength was not significantly different depending on the application technique (wet or dry bonding)(p>0.05). 3. DH2 and SC2 generally showed high shear bond strength and DH2/ SUP(W, D), DH2/CRA(D), SC2/P50(W) and SC2/SUP(W) couples showed somewhat higher shear bond strength than others.

응급의학과로 내원한 환자중 내원시 예상치 못했던 사망에 대한 고찰

김승렬,김상은,양혁준,정호성,박철완,이 근 대한응급의학회 1995 대한응급의학회지 Vol.6 No.1

Patients die in the emergency department frequently ; however, there has been little about the incidence and cause of Emergency Department death in the emergency medicine literature. This study was conducted retrospectively to gain insight into the patients who die suddenly and unexpectedly in the Emergency Department(ED). A total of 360 patients were pronounced dead in the ED from 1991 through 1994 in Chung Ang Gil Hospital. Of the 360 patients, 309 (86%) were brought to the ED with cardiopulmonary resuscitation in progress or as do not resuscitation(DNR) patients, leaving 51(14%) patients who met the unexpected death criteria. Of the unexpected deaths, 32(62.7%) patients presented to the ED with either abnormal vital sign (24 of 32) or some alteration in consciousness (18 of 32), or both of them (10 of 56). Medical and surgical causes of death represented 47.1% (24 patients) and 15.6% (8 patients) of the unexpected deaths respectively. Trauma represented 19 (37.3%) of the unexpected deaths, with 14 of these being the result of motor vehicle collision. The yearly incidence of unexpected ED death is presented in numbers of deaths per 10,000 ED visits. In 1991, the incidence was 3.4, and in 1992, 1993 and 1994 those were 2.7, 2.2 and 2.1 respectively.

감사인의 양적 중요성 판단 기준의 적용에 관한 연구

金大根,趙徹衍 韓日經商學會 2001 韓日經商論集 Vol.21 No.-

This thesis studied if, under the varied audit environment, there is any significant difference on the degree of strictness (rigidity) of an auditor's quantitative materiality judgement when an auditor formulates audit opinion regarding to the exception out of gathered evidence. This study defined the degree of strictness as : the lower the average of threshold between unqualified and qualified opinion, the stronger the degree of strictness of an auditor's quantitative materiality judgment. This research found the followings: First, there is no statistically significant difference in the degree of strictness of an auditor's quantitative materiality judgment affected by the scale of the auditor. Second, the scale of the client affects an auditor in the degree of strictness of an auditor's quantitative materiality judgment. Third, there is a significant difference in the degree of strictness of an auditor's quantitative materiality judgment for listed vs. non-listed corporation. Fourth, the higher the debt ratio of the client, the stronger the degree of strictness of an auditor's quantitative materiality judgment. Fifth, an auditor applied quantitative materiality judgment more strictly for the client corporation with any turnover between net profit and net loss.

시차주사열량분석기를 이용한 치과용 접착시멘트의 경화기전 및 반응열에 관한 연구

김철위,이용근,윤태호,김효종,남세진 大韓齒科器材學會 2000 대한치과재료학회지 Vol.27 No.3

The working time of dental cement has a close relation with the setting time, where the setting reaction can be said as the result of the chemical reaction between cement liquid and powder. The purpose of this experiment was to investigate the setting characteristics and setting rate of dental cements by measuring the exothermic heat(Joule/gram) from the setting reaction at specified times using a differential scanning calorimeter (Differential Scanning Calorimeter, DSC 204, TASC 414/3A Controller, Netzche, Germany). Graphs of time-exothermic heat at 37℃ isothermal condition, showing the setting reaction of dental cements were plotted. Three types of luting cements studied were zinc-phosphate cement (ZPC), polycarboxylate cement (PCC), and glass ionomer cement (GIC). The effects of powder-liquid ratio on the setting characteristics of cements were also included. The amount of heat (calory) released per one gram of cement was calculated at each specified time, and was analyzed. ANOVA and Scheff's multiple comparison test (p=0.05) were used for statistical analysis using SPSS/PC+. The setting rate of cement was not constant during the setting reaction, and different setting characteristics were observed depending on the type of cement and powder/liquid ratio. Generally, 70∼90% of the setting reaction, measured by the exothermic heat release, occurred within 5 minutes after mixing. The exothermic heat released by ZPC was very high immediately after mixing, and the duration of the heat release was prolonged compared with other cements. The exothermic heat release of PCC finished most rapidly. It was generally observed that the amount of heat release (rise in temperature) per one gram of cement was highest for ZPC, followed by GIC, and then PCC. However, heat release during the first 2∼5 minutes after mixing was highest for GIC, followed by ZPC and then PCC. According to the Scheff's multiple comparison test, the duration of the total setting reaction did not show any significant difference among the cements(p>0.05), and also among the different power/liquid ratio groups(p>0.05). It was observed that more heat was released with the lower powder/liquid ratio than the higher powder/liquid ratio.