제주 칠머리 당굿 중 새무리는 노래 교수ㆍ학습 과정안

고현민 한국국악교육연구학회 2008 국악교육연구 Vol.2 No.1

공간필터를 이용한 회전체의 회전속도 벡터계측

고현민,노도환 전북대학교 공업기술연구소 1998 工學硏究 Vol.30 No.-

In this paper, we propose the non-contact method to measure rotational speed vector using spatial filtering method. The rotational speed ω is known by the frequency of output sinusoidal signal direct proportional to that and the rotational direction is given by the phase delay from the weighting function design of spatial filter.

서양금혼초 부위별 추출물의 티로신에이즈, α-글루코시다아제 저해활성 및 항산화효과

고현민,엄태길,송선경,조가영,김주성 한국약용작물학회 2017 한국약용작물학회지 Vol.25 No.3

Background: Invasion of these invasive plants in the ecosystem threatens the habitat of endemic species, reduces biodiversity, and causes a disturbance in the ecological system. Hypochaeris radicata L. (Asteraceae), the most invasive plant in Korea, particularly in Jeju Island, invades farmlands, and autochthonous forests, resulting in the establishment of monocultures and modification of the ecosystem structure. Methods and Results: In this study was, we evaluated the biological activity of 70% ethanolic extracts from different parts of Hypochaeris radicata L. The biological activities of 70% ethanolic extracts of different parts, such as flower, leaf, stem, and root, of H. radicata were investigated. The total polyphenol content was highest in flower extracts (50.82 ± 3.16 ㎎ · GAE/g). In addition, the highest flavonoid content was observed in flower extract (15.19 ± 2.03㎎ · QE/g). The flower extract of H. radicata exhibited stronger DPPH radical-scavenging activities, ABTS radical scavenging activities, and reducing power than the other parts. The flower extract of H. radicata was observed to have the highest tyrosinase and α-glucosidase inhibitory activities. Conclusions: The flower extracts of H. radicata exhibited remarkable antioxidant activity as well as tyrosinase and α-glucosidase inhibitory effects. These activities might be related to the phenolic compounds present in the H. radicata flower extract.

에탄올 농도에 따른 산딸나무 열매 추출물의 항산화 활성 평가

고현민,김경철,김주성 한국약용작물학회 2018 한국약용작물학술대회 발표집 Vol.2018 No.10

Background : Cornus kousa fruit has been used as a medicine for a long time. Therefore, for the purpose of utilizing C. kousa fruit as a health functional food, antioxidant activity was tested by extracting ethanol concentrations to identify optimal extraction conditions. Methods and Results : C. kousa fruits used in this study were washed, dried and pulverized. Then, the samples and solvents by ethanol concentration (0, 20, 40, 60 80 and 100%) were extracted at 80℃ for 90 minutes at 1 : 20 ratio, respectively. Afterwards, it was filtered, concentrated, frozen and dried. Total phenol and flavonoid content, DPPH and ABTS radical scavenging activity, ferric reducing antioxidant power and oxygen radical absorbance capacity were measured. The total phenol and flavonoid content is the highest in 60% ethanol extract at 20.08 ㎎·GAE/g, 0.86 ㎎·QE/g. In addition to all antioxidant studies showed the highest activitiy in 60% ethanol extract. Also, when HepG2 cells were treated with ethanol extract at 200 ㎍/㎖ concentrations, the survival rate was more than 90% and cytotoxicity was not observed. Then, HepG2 cells were treated with tBHP to induce oxidative stress, and the cytoprotective effect and inhibitory activity of ROS production were measured. As a result, 60% ethanol extract showed the best activity. Conclusion : When extracting C. kousa fruits with ethanol as solvent, It is expected best to use 60% ethanol to maximize potential as a material for health functional foods.

Antioxidant activity and phenolic acid content of Gynostemma pentaphyllum leaves according to extraction conditions

고현민,엄태길,김주성 충남대학교 농업과학연구소 2019 Korean Journal of Agricultural Science Vol.46 No.1

This study was intended to provide basic data for a health functional food study by exploring antioxidant activity of reflux extract according to the concentration of ethanol and the extract of ultrasonic waves extracted and reflux extracted under the same solvent conditions. In the same solvent condition, the reflux extract (75.10 ± 1.99 mg) showed a higher total phenol content than the ultrasonic wave extract (51.74 ± 2.28 mg). Flavonoids also had a higher reflux extract (25.05 ± 1.53 mg) than did ultrasonic extracts (16.23 ± 1.95 mg). Reflux extract according to ethanol concentration was found to have a higher phenol content than the 70% ethanol extract (40.60 ± 1.49 mg) in 60% ethanol extract. Flavonoid content was also similar to phenol content in reflux extract as determined by ethanol concentration from 60% ethanol (25.05 ± 1.53 mg) to 70% ethanol extract (6.60 ± 0.46 mg). In addition, the antioxidant activity (DPPH, TEAC, FRAP, ORAC) of the reflux extract in the same solvent conditions tended to be higher than that of ultrasonic extracts. Also, 60% ethanol extract had better antioxidant activity than 70% ethanol extract. However, an analysis of phenolic acid content through HPLC showed that the ultrasonic extract had a higher content in the same solvent condition than did the reflux extract. Not only the presence of phenolic acid, but also those of other compounds are believed to be attributed to the activity of antioxidants. Therefore, further studies are needed to clarify this phenomenon.

에탄올 농도별 산삼배양근 추출물의 항산화 및 효소 저해활성

고현민,김경철,엄태길,김주성 한국약용작물학회 2018 한국약용작물학술대회 발표집 Vol.2018 No.05

Background : Mountain ginseng adventitious roots are being produced in large quantities by using plant tissue cultivation techniques to overcome the disadvantages of recent cultivation techniques. In this study, we intend to provide basic data on the development of cosmetic products by measuring the antioxidants of mountain ginseng adventitious roots extracted from each ethanol concentration and the activity of tyrosinase and elastase enzyme inhibition. Methods and Results : After drying, the mountain ginseng adventitious roots, it was crushed to less than 0.5 ㎜. for testing. It was then extracted at 70℃ for 180 minutes, adding 10 times its weight to each ethanol concentration (0, 20, 40, 60 and 80%) and filtered. The extract is depressurised and used in experiments after freeze-drying. The total phenols and flavonoids content measurement showed the most content in 80% ethanol extract. However, Trolox equivalent antioxidant capacity, ferric reducing antioxidant power showed the best ability in 60% ethanol extract. In addition, the active measurements of tyrosinase and elastase enzyme inhibition performed to check skin whitening and wrinkles improvement showed the highest activity in the 80% ethanol extract. Conclusion : As a result, the optimum conditions for the use of natural antioxidants and functional foods were maximized when it is extracted with 60% ethanol. It is also expected to be valuable as a natural cosmetics material when extracted with 80% ethanol as a solvent when combined with the results of enzyme inhibition activity.

ISO 9000도입과 경영 시스템 요소와의 관계 연구

고현민 단국대학교부설 신소재기술연구소 2003 신소재 연구논집 Vol.12 No.1

노면표시 및 교통신호등 인식을 위한 영상처리 알고리즘

고현민,정준익,최성구,노도환 전북대학교 공업기술연구소 1997 工學硏究 Vol.28 No.-

In this paper, we present the algorithm for recognizing road sign and traffic signal from VTR road image. First, the recognition of road sign can be detected using boundary point estimation from some detect-lines within the region between the left and the right lane deduced by preprocessing. For this algorithm, index matrix method is used to determine what sign is. To get the index matrix, boundary points have processed at the front stage such as the estimation of the distribution of vertical-points and middle point. Then, the recognition of traffic signal is performed by using the window minified by several detect-lines which position may be expected. For this algorithm, line profile concept is adopted. Above all, the merit of this algorithm is the use of one camera system, so-called monocular vision system differed from other system such as stereo vision system, fusion system. This leads to a low cost and compact system.

만성 뇌졸중 환자의 마비측 엉덩관절에 당김과 미끄러뜨림 적용이 족저압, 가동범위, 균형과 보행에 미치는 영향

고현민,이관우 국제차세대융합기술학회 2023 차세대융합기술학회논문지 Vol.7 No.10

본 연구는 만성 뇌졸중환자의 마비측 엉덩관절에 당김과 미끄러뜨림 관절가동술을 적용하여 정적· 동적 족저압, 관절가동범위, 균형과 보행에 미치는 영향에 대해 알아보자 실시하였다. 연구 결과 마비측의 정적·동적족 저압, 엉덩관절 가동범위, 버그 균형 척도 검사(BBS), 10m 걷기 검사(10MW)에서 실험군과 대조군 모두 유의한 차이가 있었다(p<0.05). 그리고, 마비측의 정적·동적족저압, 엉덩관절 가동범위, BBS, 10MW 검사에서 실험군과 대조군은 중재 전은 유의한 차이가 없으나 중재 후는 유의한 차이가 있었다(p<0.05). 하지만 실험군과 대조군의 엉덩관절 굽힘 가동범위는 유의한 차이가 없었다(p>0.05). 결론적으로 만성 뇌졸중환자에게 엉덩관절의 당김과 미 끄러뜨림 관절가동술은 정적·동적족저압, 관절가동범위, 균형과 보행에 효과가 있었다. This study was to investigate the effect of the traction and gliding on the affected hip joint on the Range Of Motion(ROM), the Burg Balance Scale(BBS) test, the 10m walking(10MW) test, in the Static and Dynamic affected side Foot Pressure(SDFP), in chronic stroke patients. The results of the study are as follows; The experimental group and the control group was a significant difference between pre and post intervention on the affected hip joint of the ROM, the BBS test, the 10MW test, in the SDFP after intervention(p<0.05). There was no statistically significant difference between the groups of the ROM, the BBS test, the 10MW test, in the SDFP before intervention, but there was a significant difference after intervention(p<0.05). but The experimental group and the control group was no significant difference hip flexion after intervention(p>0.05). The traction and gliding on the affected hip joint was effective the ROM of Hip joint, the BBS test, the 10MW test, in the SDFP in chronic stroke patients.

병원 간호사의 만족, 직무 스트레스, 소진, 조직시민행동 및 생산성에 관한 연구

고현민,곽신영,장경 대한안전경영과학회 2015 대한안전경영과학회지 Vol.17 No.4

The health care markets are rapidly expanded due to population aging, increasing incomes, strengthening assurance of health insurance and so on, and the competition in the markets is getting serious. In the industry, hospitals have played more important role than any others, where doctors, nurses, medical technicians, administrative staff, etc cooperatively works hard. Among them, nurses capture 40 percents of specialized hospital workers and their role for patients as customers is essential. Therefore, it could be one of the most important keys to increase the productivity and wellbeing of nurses with respect to enhancing efficiency and competitiveness of operating hospitals. In this paper the impact of nurses' job satisfaction, job stress, burnout, and organizational citizenship behavior on their productivity is studied. The subjects were 576 nurses in 20 different hospitals in Seoul, Kyounggi, etc. We held hypotheses and statistically tested and analysed them, using SPSS 20.0 software. Thus, we found various significant results(p<0.05), and they will give useful suggestions for managing nurse manpower and enhancing their productivity.