ICT를 활용한 남·북한 중등학교 수학 교과 교수 - 학습 과정 연구 : 삼각함수를 중심으로 Trigonometricla function

조장운,이식 여수대학교 2002 論文集 Vol.17 No.-

The learning of the curriculum has many advantages of promoting the effect of learning by providing the environment of learning that could not be provided in the existed classroom. Much effort to cause the learner's motivation and heighten the accomplishment degree by utilizing GSP program has been made, and GSP has been suggested as assistant study materials to show the function graph in middle-high school. We expert the curriculum of mathematics to keep up with the goal of information telecommunication technology of the 7-th curriculum and am looking forward to discussing on the Web the curriculum of mathematics which is the basis of science and technology and media of information telecommunication very soon.

설탕에스테르의 물리적 성질에 관한 연구

안운선,노장숙,이광순 成均館大學校 1976 論文集 Vol.23 No.-

설탕에스테르를 관크로마토그래피와 박층크로마토그래피(TLC)를 사용하여 모노-, 디-, 및 트리에스테르로 단리 정제하였다. 이와 같이 정제한 모노스테아르산설탕과 모노팔미트산설탕의 CMC를 20℃∼40℃ 사이의 여러 온도에서 순수한 물과 NaCl, KCl 및 여러 알코올 용액에서 측정하였다. 이 결과로부터 모노에스테르의 heat of micellization 값을 계산하였던 바, 30℃이하에서는 양의 값을 나타내었으며, 이 값들이 무기염에 의해서는 거의 영향을 받지 않는다는 사실을 알았다. 여러 가지 알코올(C_1-C_4) 용액에서의 모노팔미트산설탕의 CMC는 알코올 농도의 증가에따라서 처음에는 증가하다가 농도가 약 0.05∼0.01 몰 퍼센트를 지나면 다시 감소한다. 이것은 설탕에스테르와 알코올이 공동으로 미셀을 형성하기 때문일 것으로 생각된다. 디에스테르는 물에 전혀 녹지 않지만 모노에스테르용액에서는 쉽게 용해된다. 그리고 이러한 용액의 표면장력 대 농도 곡선은 약 40dyne/㎝ 근처에서 불연속을 나타낸다. 이것은 낮은 농도에서 모노에스테르와 디에스테르가 불규칙한 멋대로의 표면배향을 하고 있다가 이 농도에서 보다 안정하고 치밀한 배열로 갑자기 바꾸어지기 때문이라고 생각된다. The critical micelle concentrations (CMC) of sucrose monostearate and sucrose monopalmitate are determined in pure water, in inorganic salt solutions, and in various alcohol (C_1-C_4) solutions at temperatures between 20 and 40℃. Using the results, heat of micellization is calculated. The values are positive below 30℃ and unaffected almost by the presence of inorganic salts. The CMC value is very sensitive in the presence of alcohols (C_1-C_4). The CMC increases at first as the concentration of alcohol increases, and then it decreases after showing a maximum. The maximum point lies between 0.05 through 0.1 mole per cent of alcohol, depending on the kind of alcohols. It is found that though the diester is insoluble by itself, it readily dissolves in the monoester solution. In the presence of diester, it is found that the surface tension decreases as usual way if the concentration of monoester is incrased, but it shows a sudden discontinuity at about 40 dyne/㎝.

核武器使用의 違法性에 관한 小考 : 國際協定과 UN決議를 중심으로

鄭雲章,李龍浩 嶺南大學校附設 社會科學硏究所 1992 社會科學硏究 Vol.12 No.2

흰쥐에서 연령이 골격근의 당 대사에 미치는 영향

정응찬,우운기,이석강 영남대학교 기초/임상의학연구소 2001 Yeungnam University Journal of Medicine Vol.18 No.1

Background: It is doubtful that aging causes deteriorated glucose metabolism and insulin resistance of skeletal muscle. Some researchers had different results about it. So we have studied the mechanism responsible for the abnormal glucose tolerance associated with aging in rapidly growing and matured rats. Materials and Methods: Animals were used S.D. rats. Growing rats were 7 weeks old (BW: 160-190 gm) and matured rats were 28 weeks old (BW: 420-525 gm). Results: Fasting blood glucose and plasma insulin levels were significantly elevated in matured rat compared with growing rats. And during oral glucose tolerance test the glucose level was also significantly elevated in matured rats. These results confirmed an insulin resistant state of aging. Insulin levels at 30 minutes of oral glucose tolerance test was significantly elevated in growing rat. But at 120 minutes it was maintained at higher level in matured rats than in growing rats. It suggested the possibility of increased insulin secretion by initial stimulation of beta-cells in growing rats, and increased secretion and decreased catabolic rate of insulin in matured rats. Glucose uptake rate of soleus muscle in matured rats was lower than that of growing rats, but the difference was not statistically significant. The dose(insulin)-responsive(glucose uptake) curve of soleus muscle was only slightly deviated to the right side. Conclusion: Glucose metabolism of rat skeletal muscle was worsened by aging. The data of glucose uptake experiments suggested the possibility of insulin resistance of skeletal muscle in matured rats, but the mechanism of insulin resistance of skeletal muscle need further studies.

성별, 연령 및 생리주기에 따른 대장 통과시간의 변이

이상전,이두한,송영진,최재운,장이찬 대한대장항문학회 1995 Annals of Coloproctolgy Vol.11 No.1

풍동실험을 위한 LabVIEW 응용 온라인 계측시스템의 개발

김봉근,장성태,이경용,박운진 한국기술교육대학교 2004 論文集 Vol.10 No.2

On-line measurement systems were newly developed for the performing effective wind tunnel experiments by utilizing the LabVIEW(Laboratory Virtual Instruments Engineering Workbench) system. As a result, instead of post-data-processing procedures based on Fortran programming which was commonly adopted in conventional measurement systems, wind tunnel experiments can be carried out on window-based PC operating systems and thus much time and effort required in analyzing fluid flow field can be successfully reduced. Furthermore, by utilizing the web publishing tool which is provided by the LabVIEW, it is possible to monitor and to control each measurement step via internet web pages from the remote area other than the laboratory in which experiments are carried out.

박막 크로멜-알루멜 열전퇴형 교류-직류 변환기

정인식,김호운,김진섭,이정희,이종현,신장규,박세일,권성원 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

A planar chromel-alumel multijunction ac-dc converter was fabricated on a LPCVD Si_(3)N_(4)/SiO_(2)/Si_(3)N_(4)-diaphragm, prepared by silicon bulk micromachining, which thermally isolated a bifilar evanohm-heater and the hot junctions of a chromel-alumel thermopile from the silicon substrate. The voltage responsivity, the ac-dc transfer error, and the fluctuation of the output thermoelectric voltage of the converter were investigated. The respective voltage responsivities in air and in a vacuum of the converter were about 3.16 mV/mW and 9.41 mV/mW. The ac-dc voltage and the current transfer errors in air were about ±1.5 ppm and ±0.7 ppm in a frequency range from 10 Hz to 10 kHz, respectively. The fluctuation of the output thermoelectric voltage from 5 seconds to 120 seconds after preheating in air for 5 seconds was about 0.06 % for a heater input of dc 1 V.

심전도의 디지털 기록화 모듈과 개인용컴퓨터 저장/분석시스템의 개발

조명찬,김기석,배장환,연태진,김동운,이태수,전은석,김유진 충북대학교 의학연구소 2001 忠北醫大學術誌 Vol.11 No.2

연구목적: 현재 우리나라의 의료분야에서는 정보기술의 발전으로 처방 전달 시스템과 전자차트의 활용이 상용화 되고 있으나 병원내에서 가장 많이 처방되고 검사되는 12-유도 심전도의 디지털화와 이에 연계된 심전도 결과의 개인용 컴퓨터로의 저장, 인터넷을 이용한 병원으로의 전송이나 타 기관에서의 심전도 결과의 동시 관찰 등에 관한 기술 등은 개발되지 못한 상태이다. 이에 본 연구에서는 심전도를 디지털화하며 저장이 가능한 PC 모듈을 개발하고 심전도 결과를 병원 전산 시스템에 포함시켜 병원내외에서 편리하게 조회, 검색할 수 있는 디지털 인터페이스를 개발하려 하였다. 재료 및 방법 : 낮은 전력에서 잡음특성이 우수한 대역여파기와 증폭기를 설계하였으며 각종기능이 내장된 고신뢰성 프로세서를 채택하였으며 전원 잡음이 고려된 필터와 전원 회로 설계로 하드웨어를 개발하였다. MSC 6.0과 Visual Basic 6.0을 바탕으로 하여 active X 모듈화를 유도하고 조회용 PC에서의 복원과 PACS로의 연동을 통해 순환기내과용 PACS 개발이 가능하도록 소프트웨어를 준비하였다. 결과: 심전도 검사자가 쉽게 장착, 검사가 가능한 소형화된 측정 모듈을 개발하였고 극저전류에서 동작이 가능하였으며 우수한 데이터의 압축 및 복원률을 구현하였다. 결론: 이번 심전도 디지털 모듈의 개발로 기존의 감광지에 의존하던 심전도 결과의 보존과 보관공간에 의한 경제적인 손실을 상당 부분 해결할 수 있으며 OCS에 연계된 결과로 인해 원내에서의 다면적 진료가 가능하다. 이번 연구에서 개발된 기술은 향후 디지털화된 심전도 기록장치와 같은 고부가 의료장치의 국산화와 광파일 의무기록 시스템이나 검사물의 무선 전송에 채용되어 의료 전달 체계나 응급체계의 발전에 기여하리라 사료된다. Purpose : The progressed communication technology commercialized the order communication system ( OCS) and the electric medical records( EMR) in the field of medicine in Korea. However, technologies of digitalization such as recording to personal computer, transfer to internet and simultaneous observation of electrocardiogram ( ECG) recorded at the different center were not realized yet. This study tried to invent personal computer module that can digitalize and record of the ECG and design the digital interface that can approach and search digitalized ECG in various part of hospital simultaneously. Materials and Methods : We had designed high-fidelity digital filter and amplifier which can work in very low voltage, had selected multifunctioned microprocessor. Activation X modulation was conducted by MSC 6.0 and Visual Basic 6.0. Softwares were prepared for the transfer of ECG informations from terminal PC to PACS and cardiologic PACS was designed for future application. Results : We have developed the small, portable, very low voltage managed ECG module and high quality digitalized information compression software in OCS and PACS. Conclusion : This invented ECG digital archive module can save hospital cost by substitution of ECG papers for digital storage or on-line storage, therefore ECG data can be handled in multisector of the hospital and through telemedicine. This technology can be applied to domestic ECG digitalizing device development and effective medical transfer system by adoption cordless medical information delivery.

Enhanced light output of InGaN/GaN blue light emitting diodes with Ag nano-particles embedded in nano-needle layer.

Jang, Lee-Woon,Ju, Jin-Woo,Jeon, Dae-Woo,Park, Jae-Woo,Polyakov, A Y,Lee, Seung-Jae,Baek, Jong-Hyeob,Lee, Song-Mei,Cho, Yong-Hoon,Lee, In-Hwan Optical Society of America 2012 Optics express Vol.20 No.6

<P>2.7 times increase in room temperature photoluminescence (PL) intensity and 3.2 times increase in electroluminescence (EL) intensity were observed in blue multi-quantum-well (MQW) GaN/InGaN light emitting diodes (LEDs) as a result of introduction of nano-needle structure embedded with Ag nanoparticles (NPs) into n-GaN film underlying the active MQW region and thick p-GaN contact layer of LEDs. The nano-needle structure was produced by photoelectrochemical etching. Simultaneously a measurable decrease in room temperature decay time from 2.2 ns in control samples to 1.6 ns in PL was observed. The results are explained by strong coupling of recombination in GaN/InGaN MQWs with Ag NPs related localized surface plasmons.</P>

Effects of Ar/O2 Gas Ratio on ZnO Films Prepared by Using Ion Beam Deposition

Lee, InHwan,Kim, Myoung,Jeon, Ju-Won,Jeon, Dae-Woo,Sahoo, Trilochan,Lee, Mi-Hee,Lee, Ru-Da,Jang, Lee-Woon,Ju, Jin-Woo,Jo, Young Je,Kwak, Joon Seop Korean Physical Society 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.6