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.

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.

유기질비료 시비량에 따른 오미자 묘목의 초기 생육특성에 관한 연구

이경아,박태호,박성용,김도현,오문국,김민수,안태진,이상원,김영국,안영섭,박충범,차선우,송범헌 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.1

This study was carried out to have basic and applied informations to find the optimum nitrogen fertilization level for organic cultivation and to investigate early growth characteristics of Schizandra chinensis Baillon. Different application levels of the organic fertilizer were based on the recommended rate of N fertilizer. Five different levels of the organic fertilizer were applied to S. chinensis and early growth responses such as the length of vine, the diameter of vine, the number of leaves, and the number of branches were investigated. Lengths of main and total vines were shown longer at the level of 1.0 time organic fertilizer than those at others. The vine length at early growth was the highest at the level of 1.0 time organic fertilizer among the treatments. Stem diameter was shown thicker level of 1.0 time organic fertilizer than others on August and September, whereas on October it was the thickest in the conventional cultivation. Number of leaf was increased higher at the level of 1.0 and 2.0 times organic fertilizer than that in the compared to conventional. The number of branches was appeared the lowest at the level of 1.0 time organic fertilizer at early growth, however they were increased through progressing their growth stages. They were not significantly difference among the treatments except for the level of 2.0 times organic fertilizer. Based on the research results, the growth of S. chinensis was commonly higher at the level of 1.0 time organic fertilizer compared to other treatments.

2,4-bis (p-hydroxyphenyl)-2-butenal (HPB242) induces apoptosis via modulating E7 expression and inhibition of PI3K/Akt pathway in SiHa human cervical cancer cells.

Kim, Man Sub,Kim, Jung Hee,Bak, Yesol,Park, Yun Sun,Lee, Dong Hun,Kang, Jeong Woo,Shim, Jung-Hyun,Jeong, Heon Sang,Hong, Jin Tae,Yoon, Do Young Lawrence Erlbaum Associates, Publishers [etc.] 2012 Nutrition and cancer Vol.64 No.8

<P>The Maillard reaction is a chemical reaction occurring between an amino acid and a reducing sugar, usually requiring thermal processing. Maillard reaction products (MRPs) have antioxidant, antimutagenic, and antibacterial effects, and although 2,4-bis (p-hydroxyphenyl)-2-butenal (HPB242), a fructose-tyrosine MRP, appears to inhibit proliferation of cancer cells, its mechanism of action has not been studied in detail. We found that HPB242 treatment modulated expression of cyclins and tumor suppressor genes in SiHa human cervical cancer cell lines: cyclins and phospho-pRB were downregulated, whereas the expression of CDK inhibitors and p53 was enhanced. HPB242 induced apoptosis dose-dependently by suppressing E7 expression and leading to sub-G1 cell-cycle arrest in SiHa cell lines; treatment also led to the proteolytic cleavage of caspase-3, -9, and poly (ADP-ribose) polymerase. Moreover, HPB242 upregulated Fas expression, altered expressions of pro- and antiapoptotic factors, and also inhibited nuclear translocation of nuclear factor κB and phosphorylation of IκB. HPB242 treatment decreased phosphatidyl inositol-3 kinase and p-Akt expression levels, demonstrating that this survival pathway may also be inhibited by HPB242. Cumulatively, HPB242 promotes apoptosis by influencing E7 expression, inducing cell-cycle arrest at sub-G1 phase, and promoting both intrinsic (mitochondrial) and extrinsic (Fas-dependent) apoptosis in SiHa human cervical cancer cells.</P>

Anti-Cancer Effect of Ginsenoside F₂ against Glioblastoma Multiforme in Xenograft Model in SD Rats

Shin, Ji-Yon,Lee, Jung-Min,Shin, Heon-Sub,Park, Sang-Yong,Yang, Jung-Eun,KimCho, So-Mi,Yi, Tae-Hoo The Korean Society of Ginseng 2012 Journal of Ginseng Research Vol.36 No.1

The glioblastoma multiforme (GBM) is the most common malignant brain tumor in adults. Despite combination treatments of radiation and chemotherapy, the survival periods are very short. Therefore, this study was conducted to assess the potential of ginsenoside $F_2$ (F2) to treat GBM. In in vitro experiments with glioblastoma cells U373MG, F2 showed the cytotoxic effect with $IC_{50}$ of 50 ${\mu}g/mL$ through apoptosis, confirmed by DNA condensation and fragmentation. The cell population of cell cycle sub-G1 as indicative of apoptosis was also increased. In xenograft model in SD rats, F2 at dosage of 35 mg/kg weight was intravenously injected every two days. This reduced the tumor growth in magnetic resonance imaging images. The immunohistochemistry revealed that the anticancer activity might be mediated through inhibition of proliferation judged by Ki67 and apoptosis induced by activation of caspase-3 and -8. And the lowered expression of CD31 showed the reduction in blood vessel densities. The expression of matrix metalloproteinase-9 for invasion of cancer was also inhibited. The cell populations with cancer stem cell markers of CD133 and nestin were reduced. The results of this study suggested that F2 could be a new potential chemotherapeutic drug for GBM treatment by inhibiting the growth and invasion of cancer.

제주도 마래사상충 자충의 정기출현성 분석을 위한 수학적 검토

박영일,강신영,이순형,심태섭 중앙대학교 의과대학 의과학연구소 1981 中央醫大誌 Vol.6 No.2

The different periodicity of microfilariae of Brugia malayi in the blood has been observed by many investigators in the various areas. This study was undertaken to determine the periodicity of microfilaria in Cheju area, where malayan filariasis is endemic, and to compare author's results with that of calculating result from the data reported by Kim(1971). In this study, 9 microfilaria positive cases in Cheju area were analysed. For the mathematical analysis of periodicity pattern in the microfilaria positive cases in Cheju area, the model of Aikat & Das (1976) was applied to the observed data. The periodicity of the present data was distinctly nocturnal pattern in which the peak hour of microfilaria density was 01:37 a. m. and periodicity index was calculated to be 90.13% by using above mathematical model, while the inland area of Korea, the peak hour was at 00:34 a. m. and periodicity index was calculated to be 128.86%. On the base of the above mathematical analysis, it was clearly shown that there was almost no difference in peak hour and periodicity index between the two areas. Also it is certain that the periodicity pattern of Brugia malayi in Korea is tangibly nocturnal and is closely similar to that in the Penang strain of Malaya and Kerala strain of India.

Linear Poly(ethyleneimine)을 포함하는 루테늄 착물의 합성과 성질

박명규,한정호,조태섭 嶺南大學校基礎科學硏究所 2001 基礎科學硏究 Vol.21 No.-

Many researchers have interested ruthenium complexes due to their similarity and difference in chemical properties. In this study, [Ru(phen)_2LPEI]^2+ complex was synthesized by the reaction of [Ru(phen)_2Cl_2] with polymeric amine ligands, namely, linear poly(ethyleneimine)(LPEI). [Ru(phen)_2LPEI]^2+ complexes were analyzed by NMR, UV/VIS, and MS spectrometry. as well as Elemental analysis. From NMR analysis, [Ru(phen)_2LPEI]^2+ complexes were confirmed by comparison of [Ru(phen)_2Cl_2] with LPEI complexes. Coordination of LPEI ligands to [Ru(phen)_2Cl_2] showed absorption at 480㎚, whereas [Ru(phen)_2Cl_2] complex alone has a peak at 370㎚. Mass of LPEI complexes was analyzed 1638 and 1898 dalton, [Ru(phen)_2LPEI]^2+ complex form MS spectrometry. The spectroscopic methods for the [Ru(phen)_2LPEI]^2+ complexes system revealed that two nitrogen donor atoms on the LPEI chain are coordinated to the [Ru(phen)_2Cl_2] complex.

흡연에 의한 급성 호산구성 폐렴 2예

박종빈,김학렬,주현준,유태양,신성남,신정현,송정섭,황기은,김소영,양세훈,정은택 圓光大學校 醫科學硏究所 2008 圓光醫科學 Vol.23 No.2

최근 흡연을 시작한 젊은 성언에서 급성 호산구성 폐렴의 발생에 대한 증례가 보고되고 있다. 급성 호산구성 폐렴은 대개 발열을 동반하기 때문에 초기에는 감염성 폐렴으로 잘못 진단, 치료되는 경우가 많다. 아직 정확한 병태 생리 및 조직학적 소견은 밝혀져 있지 않지만 병력 청취 및 임상 양상, 방사선 소견의 관찰을 통해 급성 호산구성 폐렴을 의심하고, 진단을 위해 기관지 폐포 세척액 검사를 시행한다면 좀 더 쉽게 진단 내릴 수 있을 것이다. 본 저자들은 최근 처음 시작한 흡연에 의해 발생한 급성 호산구성 폐렴을 진단하고, 스테로이드를 투여하여 성공적으로 치료한 환자 2예를 경험하였기에 이를 문헌 고찰과 함께 보고하는 바이다. Acute eosinophilic pneumonia(AEP) is characterized by acute febrile respiratory illness associated with diffuse pulmonary infiltration and pulmonary eosinophilia. The specific etiology for acute eosinophilic pneumonia is elusive. By some investigators, cigarette smoking is suggested as a causative substance which can cause AEP. In recent, the authors experienced two cases of AEP following cigarette smoking. Both cases had characteristic features including age around 20 years, new onset smoking before occurance of AEP, diffuse infiltration on chest radiography, pulmonary eosinophilia based on bronchoalveolar lavage and acute improvement after steroid therapy. These clinical features are resemble with previous smoking induced AEP case reports. Base on these clinical features, cigarette smoking associated AEP could be diagnosed more easily.

분산처리 체제하에서의 Dynamic Approximate Optimum Task Assignment Algorithm에 관한 연구

송태섭,박규석 慶南大學校 附設 工業技術硏究所 1988 硏究論文集 Vol.6 No.-

본 논문에서는 기존의 Task 할당 방법 및 그 문제점에 관하여 간단히 살펴보고 기존 할당 방법들의 장점들을 살려 분산 처리 시스템에서의 새로운 동적 할당 mechanism을 구축한다. 즉, 초기준최적 할당 알고리즘과 근사 최적 할당 알고리즘의 시뮬레이션을 통한 할당 결과를 Petri Net 분석 기법에 의하여 분석하고 다른 기법과의 할당 cost를 비교함으로서 최저 cost로 할당 할 수 있음을 증명하였다. 따라서, 이 mechanism은 performance와 Reliability를 크게 향상 시킨다고 할 수 있다. This paper presents the solution of optimal dynamic assignment of a modular program for distributed computing systems. This model not only applies many system resource Constrains of each processor such as processor speed, memory size, and queueing delays but also applies Concurrent execution and task precedence relationships. Consequently, it achieves to the load balancing of distributed systems. It is analyzed by a petri-net model.

추상 자료형 명세를 위한 객체 행동 분석지원 시스템 구현

송태섭,박석규 진주여자전문대학 1992 論文集 Vol.15 No.-

A large number of techniques have been devised, developed, and used for assistigng in the software development. Three such methods, representative of the entire set of such techniques, are Stepwise Refinement, Hierachical Decomposition, and Abstraction which is actively studied nowadays. All these three techniques greatly help solve the problems, while do not prevent the errors in the software product that was produced with these techniques. But abstraction technique supports object-oriented programming which creates more freely a representation of the real world porblem eomain and maps it into a solution that is software, it makes software development and maintenance easy. So these reason, object-oriented environment based on abstraction is currently being applied to software enginnering and data base. In this paper, after comparing and analyzing the previous abstract Data types implementation theory, we propose behavior specification method based on abstract Data Types, and implement Object Behavior Analysis Support System(OBASS) to output behavior specification to C++ classes.