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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.
Antinociceptive Effect of Glyasperin F Isolated from Glycyrrhiza inflata in Mice
Kim, Jin Kyu,Oh, Joa Sub,Lee, Jin-Koo The Korean Society for Applied Biological Chemistr 2013 Applied Biological Chemistry (Appl Biol Chem) Vol.56 No.6
Antinociceptive effect of glyasperin F isolated from Glycyrrhiza inflata extract (GIE) in ICR mice was studied. Oral administration of GIE (1-100 mg/kg) caused a dose-dependent reduction in acetic acid-induced writhing responses. To identify the active antinociceptive compound from the GIE, sub-fractions were obtained from the EtOAc layer of GIE by using a medium pressure liquid chromatography. From the sub-fractions obtained, the sub-fraction, which, when administered orally (10 mg/kg) showed an antinociceptive effect in both the writhing test and second phase of the formalin test was identified as glyasperin F using NMR and MS analyses. Finally, the antinociceptive effect of glyasperin F in mouse models of pain was confirmed. Orally administered glyasperin F (0.1-10mg/kg) showed a dose-dependent antinociceptive effect in both the writhing test and second phase of the formalin test. Taken together, glyasperin F isolated from the GIE may be used as a leading compound for further studies on pain and as a new drug derived from natural products for pain therapy.
정병진(Byung-Jin Jung),고재섭(Jae-Sub Ko),최정식(Jung-Sik Choi),김도연(Do-Yeon Kim),정동화(Dong-Hwa Jung) 한국조명·전기설비학회 2008 한국조명·전기설비학회 학술대회논문집 Vol.2008 No.10월
This paper is proposed the vector control of 3-phase induction motor drive system by photovoltaic generation. For performance of vector control using a current control voltage source inverter(CC-VSI). CC-VSI is controlled by torque and flux producing component of motor current, relating with current and and voltage value of photovoltaic arrays at maximum power point that varies follow different level of insolation. The MPPT using a DC-DC converter controlled the duty cycle to track maximum power from PV under different insolation conditions. 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.
Acute and Sub-chronic Oral Toxicity Study of Ammonium Persulfate in Spraque-Dawley Rats
Kim, Yong-Soon,Baek, Min-Won,Sung, Jae-Hyuck,Ryu, Hyun-Youl,Kim, Jin-Sik,Cho, Hyun-Sun,Choi, Byung-Gil,Song, Min-Sub,Song, Moon-Yong,Baik, Eun-Ju,Choi, Young-Kuk,Kim, Jong-Kyu,Yu, Il-Je,Song, Kyung-Se Korean Society of ToxicologyKorea Environmental Mu 2009 Toxicological Research Vol.26 No.3
The toxicity test of ammonium persulfate was conducted to ensure of its potential toxic effects according to the single-dose acute oral toxicity study (OECD Guideline 423) and 90-day repeated dose sub-chronic oral toxicity study guideline (OECD Guideline 408) for establishing national chemical management system, and matching in the Globally Harmonized Classification System (GHS) category. In acute oral toxicity study, pasty stool, perineal contamination and temporary body weight decrease were observed after dosing 1st and 2nd challenge (300 mg/kg body weight). All test animals were dead within 6 hours after dosing at 3rd challenge (2000 mg/kg body weight). Therefore, the GHS class of test substance is considered class 4. In sub-chronic toxicity study, body weight changes, food consumptions, hematological, biochemical and pathological examination did not show any noticeable and significant differences between the administered (5, 20, 80 mg/kg body weight) and control (vehicle only) group animals. Based on these results, the no observed adverse effect level (NOAEL) is considered above 80 mg/kg body weight.
Conjoined Audio Fingerprint based on Interhash and Intra hash Algorithms
Kim, Dae-Jin,Choi, Hong-Sub The Korea Contents Association 2015 International Journal of Contents Vol.11 No.4
In practice, the most important performance parameters for music information retrieval (MIR) service are robustness of fingerprint in real noise environments and recognition accuracy when the obtained query clips are matched with the an entry in the database. To satisfy these conditions, we proposed a conjoined fingerprint algorithm for use in massive MIR service. The conjoined fingerprint scheme uses interhash and intrahash algorithms to produce a robust fingerprint scheme in real noise environments. Because the interhash and intrahash algorithms are masked in the predominant pitch estimation, a compact fingerprint can be produced through their relationship. Experimental performance comparison results showed that our algorithms were superior to existing algorithms, i.e., the sub-mask and Philips algorithms, in real noise environments.
김무진(Moo-Jin Kim),박상섭(Sang-Sub Park) 대한검도학회 2015 대한검도학회지 Vol.26 No.1
본 연구는 학생검도선수 학부모의 만족도를 측정할 수 있는 척도 개발을 목적으로 이루어졌다. 선행 연구를 바탕으로 전문가 회의와 두 차례의 예비 조사를 통해 7개 요인의 42문항으로 구성된 설문지를 이용해 자료를 수집하였다. 자료의 수집대상으로는 전국학생검도대회에 참가한 학부모를 선정하였으며 대회장에서 직접 설문지를 배부하여 회수하였다. 자료 분석에 이용된 설문지는 총 368부이다. 분석 방법으로 먼저 문항분석을 거쳐 타당성 검증을 위해 실시한 탐색적 요인분석에서 Q11, Q24, Q34번 문항이 두 요인에서 .40을 나타내 일차적으로 제거되었다. 이후 신뢰도 확보를 위해 Cronbach"s ɑ값과 문항제거시 척도(Alpha if Item Deleted)를 구했으며 전 문항이 이 기준에 부합하는 것으로 나타났다. 그리고 확인적 요인분석을 실시하였다. 척도의 수용 가능성을 확인할 수 있는 모델의 적합도 지수가 부적합하여 SMC값이 낮은 문항부터 차례로 제거해 Q33, Q30, Q06, Q04, Q19, Q40, Q41, Q18, Q20, Q26문항을 제거한 후 적합도 지수는 수용가능한 지수를 나타내게 되었다. 이러한 과정을 통해 최종 7개 요인의 29문항으로 구성된 학생검도선수 학부모의 만족도 척도를 개발하였다. 이 척도는 집중타당성과 판별타당성을 통해 타당성 평가를 실시하였다. 논의에서는 차후의 연구에서 고려되어야 할 자료 수집 방법과 객관성을 제고할 수 있는 적합도 지수에 대한 논의가 필요함을 제시하였다. The purpose of this study was to development of scale of parents’ of Kumdo Student-Athletes Satisfaction Scale. The preliminary survey was completed over the course of the 16th middle and high school Kumdo Association Fall Conference parents" to attend a survey of 368 people was conducted final data analysis was used. Collected data were analyzed by SPSS 19.0 and AMOS 19.0. The results of this study are as follow First, through the item analysis of seven sub-factors (Guidance actions, Career guidance, Guidance of the appropriateness, motivation, Humanity Education, Leadership qualities, Training Environment) and the full 29-question questionnaire was derived. Second, exploratory factor analysis was conducted. And produce a variety of fit measure the results of applying the model in this study was appropriate. The feasibility study also confirmed the results of different evaluation methods show that the model could be applicable. Finally, 7 sub-factors and the full 29-question questionnaire was completed.
김혜진 ( Hye Jin Kim ),윤총원 ( Chung Weon Yun ),도은수 ( Eun Soo Doh ),장준복 ( Jun Pok Chang ),최명석 ( Myung Suk Choi ),양재경 ( Jae Kyung Yang ),박희권 ( Hee Kwon Park ),신학섭 ( Hak Sub Shin ),이서희 ( Seo Hui Lee ),배관호 ( 한국산림과학회 2011 한국산림과학회지 Vol.100 No.4
This study was conducted to describe forest stand characteristics of the habitats of Allium victorialis var. platyphyllum population from the ecological analysis of classification of vegetation types, importance values, species diversity, interspecific association and community similarity in Ulleung Island and Mt. Hambaek, in which investigated by 48 plots (10 m×10 m). The vegetation studied was classified into 1 community group, 2communities, 2 groups and 3 subgroups for a species unit and divided by 5 units for a vegetation unit. In the Fagus engleriana group (vegetation unit 1, 2 and 3), importance value of A. victorialis var. platyphyllum in herb layer showed relatively higher value than other units. Importance value of A. victorialis var. platyphyllum in herb layer had higher value. In the analysis of interspecific association, most of the species associated positively to A. victorialis var. platyphyllum belonged to habitat features of valley area and sub-alpine zone. Therefore, it was considered that the growing environment of A. victorialis var. platyphyllum population was closely correlated to soil moisture and air humidity.
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>