SPIM 벡터제어를 위한 태양광 발전 시스템

고재섭(Jae-Sub Ko),최정식(Jung-Sik Choi),정병진(Byung-Jin Jung),김도연(Do-Yeon Kim),박기태(Ki-Tae Park),최정훈(Jung-Hoon Choi),정동화(Dong-Hwa Chung) 한국조명·전기설비학회 2007 한국조명·전기설비학회 학술대회논문집 Vol.2007 No.11월

This paper presents the photovoltaic(PV) water pumping system with a maximum power point tracking(MPPT). The water pumping system uses a variable speed single phase induction motor(SPIM) driven a centrifugal pump by field oriented control(FOC) inverter. The MPPT using a DC-DC converter controlled the duty cycle to track maximum power from PV under different insolation conditions. The duty cycle directly relate with a flux producing current control(i<SUB>ds</SUB>). The FOC inverter uses a current control voltage source inverter(CC-VSI). The simulation results are shown that the characteristics and performance of drive system, which varies as each conditions of light by expresses in voltage(V<SUB>dq</SUB>), current(I<SUB>dq</SUB>), speed of motor and torque.

RAW264.7 세포에서 interferon-r 및 LPS에 의해 유도되는 NO생성에 미치는 TALT-35의 영향

박종일,박경석,김종석,박지훈,윤은진,송경섭,서강식,김훈,윤완희,박승길,임규,황병두 충남대학교 생물공학연구소 2006 생물공학연구지 Vol.12 No.-

TALP-35 purified from human term placenta is known to increase microtubule polymerization and stabilize the polymerized microtubule. To examine the effect of TALP-35 on immune system this study was performed. MTT assay was performed to investigate the effect of TALP-35 on the proliferation of RAW264.7 cells. TALP-35 dose dependently suppress the proliferation of RAW264.7 cells at high concentration (above 1 μM) in unstimulated cells, in case of 10 μM TALP-35 treated cells the suppression was 25% but in stimulated cells it was only 15%. Cosedimentation assay was carried out to investigate whether TALP-35 can bind to tubulin of RAW264.7, monocyte/macrophage lineage of mouse, and polymerize it. TALP-35 polymerize the tubulin of RAW264.7 cells and sedimented in dose-dependent manner. To investigate the effect of TALP-35 on the expression of iNOS protein western blotting was performed. The expression level of iNOS was decreased dose dependently in high concentration of TALP-35 treatment. To examine the activity of iNOS, secreted NO was determined by method based on Griess reaction. Interferon-γ and LPS-stimulated production of NO from RAW264.7 cells was decreased dose dependently above 0.1 μM concentration of TALP-35 and 50% is decreased at 10μM of it. This study shows TALP-35 can control cytokine induced-iNOS expression therefore it might control inflammatory diseases.

병원형태별 방사선과 서비스에 대한 임상실습생들 인식정도 비교분석

박병섭 김천대학교 2004 김천대학교 논문집 Vol.25 No.-

This study was conducted by analysis of questionnaire. The respon-dents were a student apprentice in university medical center. general hospital and sub general hospital. The questionnaire was composed of 6 categories and 26 items. Data extraction and analysis method used in this study was SPSS/PC+ (ver. 10,0) program 343, 150 and 21 students trained in uni-versity medical center. in general hospital and in sub general hospital, respectively. The questionnaire items were conducted ANOVA testand the results were as follows: 1. In question of "degree of clearance at radiography room", most of respondents were answered "clear", but the degree of clearance was dif-ferences within hospital size. 2. In question of "The exact management of radiography equipment”, respondents were answered more good in general hospital than universi ty medical center or sub generalhospital. 3. In question of "The radiotechnologist of interested in research", most of them took interest in his field, but radiotechnologist of general hospital were showed most interestin his field, 4. In question of "kindness care for patients", most of respondents were answered "kindness", but relatively lower in university medical center.

FILTER의 두께, 위치 및 energy에 의한 線量變化

박병섭 김천대학교 1990 김천대학교 논문집 Vol.11 No.-

The auther studied to dose distribution according as filter thickness and filter-dosimeter distance and energy. In order to decrease to radiation exposure dose influential to patient. Results through the study are as follows. 1. The dose decrease the more when low energy than high energy 2. The dose decrease when 40 cm between filter and dosimeter than contact of it. 3. When filter thickness in thick, dose showed rapid attenur-tion. ​​

PV 시스템의 최대출력점 추정을 위한 알고리즘 개발

박기태(Ki-Tae Park),고재섭(Jae-Sub Ko),최정식(Jung-Sik Choi),박병상(Byung-Sang Park),정동화(Dong-Hwa Chung) 한국조명·전기설비학회 2007 한국조명·전기설비학회 학술대회논문집 Vol.2007 No.5월

This paper is proposed a novel method to approximate the maximum power for a photovoltaic inverter system and tracking method. It is designed for power systems application and utilities. The proposed Maximum Power Point Tracking(MPPT) control has the advantage to provide a new simple way to approximate the optimal or rated voltage, the optimal or rated current and maximum power rating produced by a solar pane1 and the photovoltaic inverter. And this straightforward method will be named linear reoriented coordinates method(LRCM) with the advantage that Pmax and V<SUB>op</SUB> can be approximated using the same variable as the dynamic model without using complicate approximations or Taylor series. Furthermore tracking method is improved over 50% photovoltaic efficiency. This paper is proposed MPPT using LRMC and tracking method using weather condition of domestic moderate program technique. This paper is proposed the experimental results to verify the effectiveness of the new methods.

ZnO 투명전도막의 전기적 특성에 미치는 Al₂O₃의 도핑 농도의 효과

박강일,김병섭,이성욱,김현수,이세종,곽동주 경성대학교 공학기술연구소 2003 공학기술연구지 Vol.10 No.-

Al doped Zinc Oxide(ZnO:AI) films, which is widely used as a transparent conductor in optoelectronic devices such as solar cell, liquid crystal display, plasma display panel, thermal heater, and other sensors, were prepared by using the capacitively coupled DC magnetron sputtering method. In this paper the effect of doping amounts of Al₂0₃ on the electrical, optical and morphological properties were investigated experimentally. The results show that the structural and electrical properties of the film are highly affected by the doping. The optimum growth conditions were obtained for films doped with 2 wt% of indium which exhibit a resistivity of 8.5×10^(-4)Ω-cm associated with a transmittance of 91.7 % for 840 nm in film thickness in the wavelength range of the visible spectrum.

교차로계획에서 현대식 회전교차로(Modern Roundabout)의 도입 타당성

박병호,송대섭 충북대학교 건설기술연구소 2003 建設技術論文集 Vol.22 No.2

This study deals with the rationalities of modern roundabouts in the intersection planning. The goals are three-folds: (1) to compare modern roundabouts with the traditional traffic circles, and (2) to describe the types of modern roundabouts, and (3) to analyze the effectiveness of introducing the modern roundabouts to the intersection planning. The main results are as follows. Frist, the modern roundabouts have such the merits as improved safety, shorter delay, increased capacity and aesthetics compared to the traffic circles. Secondly, the modern roundabouts are described as six types of roundabouts according to the entering speed, number of lane, capacities and others. Finally, the literature survey shows that the roundabouts have such the general effects as the improved safety, decreased delay, urban aesthetics and other.

Bletilla striata REICHB.의 조직배양에 관한 연구

박병천,김홍섭 조선대학교 기초과학연구소 1989 自然科學硏究 Vol.12 No.1

자란(Bletilla striata R_EICNB)의 유축 생장에 미치는 질소원 및 stock solution 농도의 영향을 규명하기 위하여 1986년 5월에 인공 수분하여 10월에 채종한 종자를 3%H_2O_2에 35분간 살균하여 기본 배지레 파종하여 발아 시킨 유축을 질소원과 stock solution 농도를 달리한 배지에 이식 했을때 이들이 유축 생장에 미치는 영향을 검토 하였던 바 그 결과를 요약하면 다음과 같다. 1. 질소원에 따른 유축 생장이 초기에는 생장 조절 물질의 영향을 받는 것으로 나타났으며 기관이 분화 된 후에는 질소원에 의해서는 영향을 받는 것으로 나타났다. 2. 질소원에 따른 유축 생장은 NaNO_3를 첨가한 배지에서 양호하게 나타났으며 (NH_4)_2SO_4를 첨가한 배지에서는 불량하였다. 3. Stock solution의 농도는 2Mole을 첨가한 배지에서는 양호 하였으며 4Mole을 첨가한 배지에서는 불량하였다. 4. 생장 조절제에 따른 자란 유축 생장에 적합한 배지는 NAA 0.2mg/l+Kinetin 2.0mg/l를 첨가한 배지로 나타났다. In order to examine the effect of the concentration of nitrogen source and stock solution on growth of seedling of Bletilla striata R_EICHB the study was carried out. The seedlings were pollinated artificially in May 1986, harvested in october, sterilized for 35 minutes with 3% H_2O_2 and sowed in the media. The seedlings germinated were transplanted in the media contained several concentration of nitrogen source and stock solution. The results obtained were as follows ; 1. At first growth seedlings according to nitrogen source appeared to take effect of growth regulator, but of nitrogen source after organs developed. 2. Growth of seedlings according to nitrogen source were good when added to NaNO_3 and were bad when added to (NH_4))2 SO_4. 3. Concentration of stock solution was good for growth when added to 2 mole and was bad fro growth seedlings when added to 4 mole. 4. The suitable media on growth of seedlings of Bletilla striata R_EICHB, according to growth regulators was identified as the media contained NAA 0.2㎎/ℓ+Kinetin 2.0㎎/ℓ.

Gd₂O₂:TB 형광체의 MTF

박병석 김천대학교 2007 김천대학교 논문집 Vol.28 No.-

The MTF(Modulation Transfer Function) measure method has been used to measuring effective resolution in medical image.

암치료에 있어 溫熱療法(hyperthermia)의 적용에 관한 문헌적고찰

박병섭 김천대학교 2016 김천대학교 논문집 Vol.19 No.-

1. Hyperthermia therapy appeared as a 5th tumor treatment