ZnO:AI 과 ITO 투명전도막을 이용한 플랙시블 DSCs의 변환효율 특성

정기영,김지훈,성열문,곽동주,추영배 경성대학교 공학기술연구소 2010 공학기술연구지 Vol.16 No.-

In order to investigate the possible application of ZnO films as a transparent conducting oxide (TCO) electrode for film-typed dye sensitized solar cell(F-DSC), ZnO:Al films were prepared by RF magnetron sputtering method. The effects of gas pressure on the structural and electrical properties of ZnO films were mainly studied experimentally. F-DSC using either a ZnO:Al or indium tin oxide (ITO) electrode were also fabricated separately under the same manufacturing conditions. The electro-optical conversion efficiency and fill factor of the F-DSCs using both ZnO:Al and ITO transparent conducting electrodes were measured and compared with each other. ZnO:Al films showed the minimum resistivity of 2.6 x10^(-3)Ω-cm and a transmittance of 91.7% under the experimental conditions of doping concentration of 2 wt% of Al₂0₃ and gas pressure of 5mTorr. ITO films fabricated at 5mTorr of gas pressure also showed the minimum resistivity of 1.5x10^(-3)Ω-cm and transmittance of 92.1%. Although the electrical resistivity of ZnO:Al is higher than that of ITO, the conversion efficiency of F-DSC using ZnO:Al was comparable with that of F-DSC using ITO. The conversion efficiency of F-DSCs using ZnO:Al and ITO electrodes are about 2.8% and 2.9%, respectively.

망간페라이트 나노 분말의 수계분산거동 및 특성

배동식,김은정,한경섭 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-

Dispersion stability of nanosized MnFe₂O₄ powders which was produced by glycothermal process were studied in aqueous suspension using ESA(Eletrokinetic Sonic Amplitude). The average particle size of the synthesized MnFe₂O₄was about 30±10nm. The dispersion and rheological behavior of MnFe₂O₄nanoparticles aqueous suspension was investigated using MnFe₂O₄as a disperse agent. The colloidal stability of nanosized MnFe₂O₄aqueous suspensions at different pH values has been investigated by means of zeta potential, sedimentation, average particle size and microstructure of green body. The isoelectric point of MnFe₂O₄powders is at pH around 5.5 and the value of zeta potential is at its maximum near pH 11.

여성은행원에서의 스트레스 관련요인

정경태,장성실,이강숙,이연경,이동배 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.1

We surveyed 343 female bank clerks to find out associations between stress and a variety of factors including general, menstruation and reproductive characteristics of the participants. Unmarried women composed the majority of younger, lower income and lower education groups than married did. They also showed higher, though not significantly higher, scores for psychosocial well being index(PWI) and the first three items of the stress survey. And married women scored slightly higher only in the fourth item of the stress survey. Among the subgroups of married and unmarried women, many factors contributed to a higher stress score in two or more items of the stress survey: in unmarried women, lower education level, little physical exercise, and large family inhabitants, in contrast married women, higher monthly income and greater working hours were related to higher stress scores. According to the menstruation factors, subgroups with dysmenorrhea or irregular cycle and scanty bleeding volume in unmarried women and subgroups with dysmenorrhea kin married women showed higher stress scores in PWI. In married women, the proportion of those who have been pregnant was 77.2% and the proportion of those who have experienced spontaneous abortion was 24.1%. Those who have ever experienced two or more spontaneous abortion showed hgher, though not statistically significantly higher, scores for PWI. In conclusion, dysmenorrhea was associated with high stress score in two groups. And the other factors related to higher score of PWI were different between unmarred and married women, which should be considered in a management plan for mental health promotion.

이동 애드 혹 네트워크에서의 환경적응형 QoS AODV 라우팅 프로토콜에 관한 연구

裵振勝,宋東勳,吳世德,鄭燦赫,金玄郁,李光培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

In this paper, we propose a bidirectional mobile Ad Hoc routing protocol based on AODV(ad-hoc on-demand distance vector routing) with QoS(quality of service) support. At presence, wireless mobile communication focuses on how to efficiently support mobility of users more than QoS guarantee. However, in order to satisfy requirement of various applications which have been or will be served, QoS guarantee between end points is a very important issue. The existing AODV routing protocol is implemented to use only BE (Best Effort) service. However, actual wireless mobile environment requires to reduce a waste of communication resources and meet with the real-time change of data paths by setting up routes with QoS support, considering available communication resources at each node in advance. Therefore, in this thesis, we propose an adaptive QoS support method using hello message in order to rapidly meet with the change of available communication resources and to smoothly perform route maintenance. For performance evaluation, we analyzed the average data reception rate. At that time, we used evaluation parameters such as node's mobility-stop time, hello message period, and packet priority, considering the node's mobility and the number of best effort/QoS data flows. As results, we found that with our proposed method the average data reception rate was increased 16.293%, 15.914%, 17.238% for 300 mobility-stop second case and 4.809%, 4.264%, 2.956% for 300 mobility-stop second case.

중이온 빔 조사에 의한 담배의 돌연변이 유도와 내염성 식물의 선발

배창휴,Abe, Tomoko,민경수,김동철,정재성,이춘환,임용표,이효연 충남대학교 생물공학연구소 1999 생물공학연구지 Vol.7 No.-

중이온 빔을 이용한 방사선 돌연변이의 기초자료를 얻고자 담배의 수분·수정 직후의 원배에 100 Gy의 중이온빔을 조사하여 M_1세대의 종자를 얻었다. NaCI 2.0과 2.5%를 포함된 MS배지에 M_1 세대의 종자를 파종하여 17개통의 NaCI 저항성 식물체를 선발하였다. 저항성 식물체는 BY-4품종에 ^14N빔을 조사한 처리구에서만 관찰되었다. M_1 세대의 저항성 식물체의 경우 영양생장기간 중에는 외형적 변이가 관찰되지 않았으나 생식생장기의 화기에 있어서는 다양한 변이가 관찰되었다. 특히 암술 수술의 길이의 변화, 꽃잎의 변화, 불완전 화분립, 줄기당 꽃의 착생수 감소 등의 변이가 발생하였다. M_1 세대에서 17개의 NaCI저항성 계통 중에서 8계통은 M_2 세대에도 저항성형질이 발현되었고, 또한 M_2 세대의 3계통은 Mannitol이 포함된 배지에서 저항성을 보여주었다. Tobacco proembryos were irradiated with 100 Gy of heavy-ion beams (^14N, ^20Ne : 135 Mev/u) after 24 to 96 hours of pollination as a mutagen and screened M_1 generation for morphological mutants and salt-tolerant plants. Morphological and physilolgical characteristics of the salt-tolerant plants derived from the irradiated proembryo are discussed in this report. Mutants irradiated porembryos with the beams after pollination produced various kinds of morphological variation. A total of 17 salt-tolerant plants were selected from tobacco cultivar (BY-4) by treatment with ^14N beam. Shapes of filament and pollen grain of most salt-tolerant plants were abnormal compared with non-irradiated wild type, and seeds weight and fertility obviously decreased. The germination rates of the several M_2 lines on the saline and the mannitol condition were higher than that of wild type.

A-SCR을 이용한 직렬 공진형 CONVERTER의 특성평가와 설계

裵英鎬,丁元榮,金東熙 慶一大學校 1992 論文集 Vol.8 No.1

This paper discussed the operational principal and characteristics of Voltage Resonant Type DC-DC Converter of HF-Bridge Inverter Switching Control using A-SCR as switching elements. The characteristics of DC-DC Converter circuit were analyzed using the diagrams of design circuit and dimensionless control variables.

고정층과 순환유동층에서 CaSO_4의 환원반응에 대한 온도와 CO농도의 영향

배달희,류호정,박재현,이창근,선도원,이동규 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.1

순환유동층 석탄연소로에서 석회석에 의한 찰황반응에 영향을 미치는 CaSO_4의 환원반응에 의한 SO-2 재배출을 실험적으로 확인하고 SO_2의 재배출에 미치는 온도와 CO 농도의 영향에대해 상용 순환유동층에 적용할 수 있는 기초자료를 확보하기 위해 고정층과 순환유동층에서 층물질로 석회석과 상용 순롼 유동층 하부회를 이용하여 환원실험을 수행하였으며 CaSO_4의 환원반응에 미치는 온도와 CO의 영향을 측정 및 해석하였다. 고온조건에서 CO가 환원제로 작용하여 C_aSO_4로부터 SO_2가 재배출되는 현상을 확인하였으며 CaSO_4로부터 SO_2의 재배출은 온도와 CO농도가 증가함에 따라 증가하였다. 본 실험의 결과에 의해 온도가 증가함에 따라 석회석에 의한 탈황율이 감소하는 현상을 환원이론으로 설명할 수 있다는 것이 확인되었다. For qualitative understanding of the sulphur capture process in a circulating fluidized bed fumace, the effects of temperature and CO concentration on the reactivity of partially sulfated CaO were experimentally examined. The tests were performed in a fixed bed reactor and lab-scale circulating fluidized bed reactor. The materials used were partially sulfated domestic limestone and bottom ash drained from commercial circulating fluidized bed furnaces. The re-emission of SO_2 from partially sulfated limestone and bottom ash increases with temperature as well as with concentration of the reducing agent CO. From the results of this study, the temperature dependence of sulfation could be explained by reduction theory.

작업조건과 정신신체 자각증상의 관련성

정영호,유기하,이영수,이동배 충남대학교 의과대학 지역사회의학연구소 1994 충남의대잡지 Vol.21 No.1

To investigate the relationship between work characteristics and psychosomatic symptoms, the author conducted survey for 1,618 workers who employed at manufacturing factories, located in Taejon city and Chungnam region. The following results were obtained ; Among the work characteristics, job classification, duration of work, work hours per day, work intensity, working environment, and working climate showed significant relationship with the psychosomatic symptoms scores. After sociodemographic variables were controlled, the variables of above work characteristics, except work hours per day, showed statistically signicant difference. In the stepwise multiple regression of symptom scores, the significantly related variables which were work intensity, working environment, working climate selected in that order.

쌍각자궁에서 4회 반복유산 후 만삭 둔위 분만 1예

홍정의,김윤숙,최승도,선우재근,배동한 순천향의학연구소 2008 Journal of Soonchunhyang Medical Science Vol.14 No.2S

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얀의 체육 사상에 관한 연구 : 교육론, 도덕론, 통일론을 중심으로 centered on education, morality and unification

이동갑,배정하 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

It has been generally thought that Jahn's idea of physical education has something to do only with nationalism. But in fact, the idea also involves Jahn's theories of education, morality and unification as well as state. Jahn's idea of physical education can be briefly described as follows. First, Jahn's theory of education pointed out that the only way to save Germany was raising people with the balance of body and mind, suggesting the necessity of both moral and physical education of German people. The theory suggested that harmony between the two educations was required to etstablish the right image of Germans. Second, his theory of morality stressed that German young people should have the will to practice towards German unification. It sought to promote those people's firm good will and provoke their internal supreme delight. Finally, his theory of unification German young people emphasized the unification of language, morality and uniform since German young people should be identical in terms of disposition and idea towards the national unification. It also suggested student exercise and gymnastics as practical means of rasing patriotism and further realizing German unification.