방사선 조사가 폴리에틸렌의 광학적 성질에 미치는 영향

邊大鉉,李秀浣 弘益大學校 1981 弘大論叢 Vol.13 No.-

Thermoluminescence (TL) and thermally stimulated current (TSC) during warming have been found in previously oxidized polyethylene after γ-irradiation in air at room temperature. In high density polyethylene (HDPE), TL and TSC peaks appear at about 320K and 380K. It appears that the presence of crystallites is essential for an appearance of the 380K peak the carbonyl group also contributes to the 380K peak. It may be assumed that the 320 peak is originats from the vinyl radical unsaturation bond. From TSC measurements, the activation energy for 320K and 380K peaks are 0.86eV and 0.98eV, respectively. Ⅰ. 서론(Introduction) Ⅱ. 실험기구 및 방법(Experimental Apparatus and Measurements) Ⅲ. 실험결과 및 논의(Discusing of Results) Ⅳ. 결론(Conclusion) Thermoluminescence (TL) and thermally stimulated current (TSC) during warming have been found in previously oxidized polyethylene after γ-irradiation in air at room temperature. In high density polyethylene (HDPE), TL and TSC peaks appear at about 320K and 380K. It appears that the presence of crystallites is essential for an appearance of the 380K peak the carbonyl group also contributes to the 380K peak. It may be assumed that the 320 peak is originats from the vinyl radical unsaturation bond. From TSC measurements, the activation energy for 320K and 380K peaks are 0.86eV and 0.98eV, respectively.

심경병성 근이영양증에 동반된 심근병증의 단기 성장호르몬 치료효과 1례

변기현,김동수,나준식,오수환,김인재,홍범기,권혁문,남수연,강성웅,김현승 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.8

可姙期 女性의 唾液中 Peroxidase, N-acetyl-β-D-glucosaminidase의 活性度 및 遊離 sialic acid 含量의 週期的 變動

柳顯模,卞鍾秀,曺準承 慶北大學校 齒科大學 1990 慶北齒大論文集 Vol.7 No.1

In order to determine the possible effects of hormonal changes on the salivary components, the activities of peroxidase and N-acetyl-β-D-glucosaminidase, and the content of free sialic acid were measured in saliva during menstrual cycles of 11 healthy women. Elevations of salivary peroxidase and N-acetyl-β-D-glucosaminidase activities were found around the time of ovulation in 8 cycling woment : the highest enzymatic activities which were measured 15.38, 14.63 days before menstruation were 118.76±10.01 Unit/min/g of protein, 21.95±1.04 nmol/min/mg of protein in peroxidase and N-acetyl-β-D-glucosaminidase, respectively. These value of highest activity significantly increased, compared to those of menstrual period, 38.24% and 21.48% in peroxidase and N-acetyl-β-D-glucosaminidase, resectively. Large cyclic variation without any clear tendency occured in the content of the free sialic acid. J. Kyungpook Univ. Sch. Dent. Vol. 7, No. 1,23∼32, 1990

A1₂O₃의 전자선 여기 열자극 발광과 그 응용

李秀浣,邊大鉉 弘益大學校 1985 弘大論叢 Vol.17 No.2

A Study on excited Thermoluminescences of Al₂O₃electron beam Excited TL of Al₂O₃electron beam in Li+ion inplanted is investigated to obscure approaching distance of Li+ion inplanted into Al₂O₃. TL curve injected only electron beam appeared at 375K, 440K and 460K. On the other hand, TL curve in Li+ion inplanted disappeared at 375K, while TL curve at 440K increased sharp. So TL peak affected directly from excited energy of electron beam. By this data approaching distance of Li+ion inplanted into Al₂O₃was investigated And this result agrees with the TSC theory. TL peak at 375K, 460K may be affected F+ center, TL peak at 440K may be affected F center. At this suggested that Li+ion recombined electron restricted at F center and it transforms F center into F+ center.

대전시 가로수 식재지 토양의 화학적 특성에 관한 연구

고소현,박관수,강길남,방병욱,김동일 충남대학교 농업과학연구소 2005 농업과학연구 Vol.32 No.1

This study was carried out to examine the effect of heavy traffic on chemical properties of soil in roadside trees of Daejeon city. Soil samples at 0~10cm and 10~30cm depths were collected from soil of the roadside trees, Platanus occidentalis. and Ginko biloba. Soil pH in heavy traffic regions were around 7.0 at 0~10 cm and 10~30cm soil depths because of spraying of calcium chloride for snow moving. The concentrations of Fe, Cd, Cu, Zn, and Pb in soil were higher in heavy traffic regions(Daejeon Station and Daehwa Industrial Complex) than in light traffic region(Chungnam National University). The result could be from rubbing and wear of car tire and metals when they travel.

비만 여성을 대상으로 한 해조류 추출물의 국부처치와 운동 병행을 통한 지방분해 효과의 임상적 검정

서태수,이인숙,변재철,김규호,박승한,김유영,김상국,김현정,김상기,신동철,성미영,박종석,김종기,박언휘 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.3

This study was carried out to test the body fat breakdown during topical seaweed extract treatment and in combination with the aerobic exercise. Of 20 female obesity subjects, ten treated a cream types of seaweed extract(control group) and ten treated a placebo cream(placebo group). Topical treatment of each sample was designed for 4 weeks, and treated with 2 times a day about 10ml on the abdomen and the thigh, respectively. All subjects were participated aerobic dance half hour a day and four times a week. After 4 weeks of topical treatment and exercise, they were measured body fat, skinfold thickness, body circumference. Then venous blood samples were taken and analyzed blood cells, serum enzymes, and serum lipids. There were reduction of body weight, % of body fat, antebrachium, brachium, chest, waist, thigh circumference and abdomen thickness between pre and post treatment in both group. Especially, body weight and % of body fat significantly reduced in the subjects treating the seaweed extract than those treating the placebo. There were significant decrement in total cholesterol and LDL whereas increment in HDL and TBIL in the control group, but no significant difference in the placebo group. In conclusion, there were 7.6% of body fat reduction during 4 weeks of aerobic exercise and 21% of body fat reducement in combination of topical seaweed treatment and exercise, respectively. These results suggest that the topical treatment of seaweed extract should be very effective for fat breakdown. Especially, the body fat breakdown maximized in the combination with the topical seaweed extracts treatment and the aerobic exercise.

특허취득의 공시효과

김석진,변현수,진명용 慶北大學校出版部 2004 經商論集 Vol.32 No.1

Using a sample of 352 patent registrations announced by 65 firms during the 1990~2000 period, this paper investigates the announcement effect and factors affecting three-day, from -1 to +1 day, cumulative abnormal returns(CAR). We find that both abnormal returns on the announcement day and CAR(-1, +1) are 1.41% and 1.46%, respectively and all are significantly positive at the 1% level. This evidence means that the patent registrations increase shareholder wealth. Cross-sectional regression analysis reports that investment size in research and development (R&D) has a significantly positive effect on CAR(-1, +1) and firm size significantly negatively affects it.

Staphylococcus lugdunensis에 의한 감염성 심내막염 1예

최성호,박현구,변승운,구동회,강호석,장항제,김양수,우준희,김영휘,최상호 대한감염학회 2006 감염과 화학요법 Vol.38 No.5

Staphylococcus lugdunensis is a coagulase-negative staphylococcus (CNS) that is commonly found on the human perineal skin. Contrary to other CNS, S. lugdunensis is a rare contaminant in cultures and has the potential to cause clinically significant infections, including infective endocarditis. Infective endocarditis due to S. lugdunensis have been known to resemble endocarditis due to S. aureus because of its aggressive clinical course and high mortality. We report a case of infective endocarditis caused by S. lugdunensis in a 21-year-old woman. She was cured of the infection with surgical and antibiotic therapy. S. lugdunensis에 의한 감염성 심내막염은 국내에서보고가 없었던 매우 드물지만 다양한 합병증과 높은 사망률을 보이는 감염증이다. 저자들은 S. lugdunensis가 수술적 치료와 항생제 치료로 완치된 감염성 심내막염 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다.

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