A Study on the Miniaturization of a Protective Device for the Micro Smart Grid Simulator

Yun‑Seok Ko,Kyung Ryu,Min‑Soo Oh,Hyuk‑Sik Yoon 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.1

In this paper, a miniaturization methodology of protective devices (PDs) was proposed which plays a key role in evaluating the efectiveness of the developed protection and control algorithms in the micro smart grid simulator. The micro PD was designed to have the rated voltage of 19 V and the breaking current of 20 A, and was designed in a multi-layered hardware structure to satisfy the size of 13×13 cm2 . Also, the micro PD was designed in a multifunctional structure to allow one micro PD to perform all the functions of the circuit breaker, recloser and switches on the micro smart grid simulator to enhance the efciency of development. Finally, it was verifed that the developed micro PD can be applied as protective devices of the micro smart grid simulator by showing that it operates correctly according to the predetermined operation sequence for the test scenarios on the built test system.

기능성 식품으로서의 화살나무에 관한 연구

민윤식 忠州大學校 2007 한국교통대학교 논문집 Vol.42 No.-

This thesis attempts to examine Euonymus alatus, which is an accessible medical plant in nature, has been used as a source of medicinal properties and widely accepted as a medicine effective against diabetes called one of the adult diseases in the modern world. This study comes to these conclusions after administering the medicine to a diabetic mouse caused by Streptozotocin. 1. In the chemical experiment of Euonymus alatus, branch(B) is 7.1 and leaves(L) is 9.42, crude fat(B) is 5.7 and leaves is 4.3, crude protein(B) is 17.05 and leaves is 10.44, crude ash(B) is 5.8 and leaves 4.59, crude fiber(B)is 10.4 and leaves is 11.8, carbohydrates(B) is 53.95 and leaves is 4.59. 2. In the mineral contents of Euonymus alatus(mg/100g, dry weight), K is 3216.2 and Ca, Mg and Na are in order in alatus branch. K is 2852.4 and Ca and p are in order in alatus leaves. 3. In the fatty acids experiment of Euonymus alatus, Oleic acid is 29.1 in alatus branch but 24.4 in alatus leaves. Linoleic acid, Linolenic acid and Palmitic acid are analyzed in alatus branch and leaves. 4. In the free sugar contents experiment, glucose is 4.84 in alatus branch but 16.38 in alatus leaves, sucros is 4.21 in alatus branch but 5.94 in alatus leaves, fructose is 3.2 in alatus branch but 10.24 in alatus leaves. maltose, galactose and xylose are in order in alatus leaves. 5. In the amino acid experiment, Glutamic acid is 1215.4 and Leucine, Aspartic acid and Arginine are in order in alatus branch. Glutamic acid is 1119.6 and Arginine, Leucine and Valine are in order in alatus branch leaves. 6. The results of diabetes is changed to 101.4(after 5 days), 102.5(10 days), 102.9(15days) and 102.8(20days) after administering an Euonymus alatus medicine. However, the blood sugar level increases by 365.4, 395.4, 396.5 and 397.8 in the laboratory animals not given the medicine. 7. This medicine is closely connected to diabetes because the animals given the medicine shows gentle weight reduction. 8. The class given the liquid extracted from Euonymus alatus significantly decreased in the point of overall cholesterol change. 9. The class given the liquid extracted from Euonymus alatus significantly decreased in the change of triglyceride. 10. The class given the liquid extracted from Euonymus alatus significantly decreased in the change of glucose.

산수유 성분에 관한 연구

민윤식 忠州大學校 2010 한국교통대학교 논문집 Vol.45 No.-

The results of the investigation of the various ingredients of the flesh and seed of Cornus officinalis areas follows: (1) The main ingredients of the flesh were water (68.9%) and rough fiber (2.94%) while those of the seed were rough fiber (32.06%) and water (29.4%). The total anthocyanin content of the flesh and seed combined was 170.05 mg/100 g. (2) Four types of free glucose were detected, and the flesh was found to contain more glucose than the seed. Both the flesh and the seed were found to contain fructose (6.2 and 2.49%, respectively) and glucose (5.96 and 2.38%, respectively). (3) Five types of organic acids were detected, and the flesh was found to contain more organic acid than the seed. The flesh contained malic acid (1896.42%) and gallic acid (1762.08%) while the seed contained citric acid (219.69%) and gallic acid (179.09%). (4) A total of 17 types of amino acids were detected. In the flesh, the aspartic-acid content was the largest (24.25%), followed by leucine (23.14%). In the seed, the aspartic-acid content was also the largest (182.64%), followed by serine (92.64%). (5) Eight types of minerals were detected. In the flesh, the potassium (K) content was the largest (598.7%), followed by Mg (50.9%). In the seed, the calcium content was the largest (399.8%), followed by K (298.8%). (6) A total of seven types of fatty acids were detected. Both in the flesh and in the seed, the linoleic-acid content was the highest (9.69 and 54.64%, respectively), followed by oleic acid (5.56 and 12.72%, respectively).

뇌졸중 환자에서 아포지단백 E의 유전자형에따른 혈중 지질과 예후

김연희,박성희,신용일,서정환,김달식 大韓再活醫學會 2000 Annals of Rehabilitation Medicine Vol.24 No.4

탄산가스 농도 변화가 팽이 버섯 재배에 미치는 영향

윤형식 외 한국버섯학회 2010 한국버섯학회지 Vol.8 No.3

팽이버섯 병재배에서 재배사 내의 탄산가스 농도를 조절하여 소비자 요구에 맞는 버섯을 안정적으로 생산하고, 생육과 수확에 관련하여 적정기준 설정을 위해 실험을 수행한 결과이다. 공시균주 특성 값을 종합해보면 탄산가스 농도가 높아지면 초발이소요일수, 생육일수, 수확일수는 증가하는 경향이고, 백색계열보다 갈색계열이 탄산가스 농도에 상관없이 초발이소요일수, 생육일수, 수확일수가 전체적으로 짧으며, ASI 4103 균주와 같이 균주의 유전적 형질이 재배적 특성에 많은 영향을 주는 것으로 판단된다. 병당 수량성은 균주에 따라 처리농도에 따른 증감의 차이는 있으나, 전반적으로 탄산가스 농도가 높아지면 수확량은 감소하였다. 개체중은 균주에 따라 약간씩 차이는 있으나 대체적으로 탄산가스 농도가 증가하면서 약간씩 감소하는 경향이다. 병당 개체수에서는 균주간의 차이가 커서 탄산가스 농도 증가에 따른 일정한 경향을 확인 할 수 없었다. 자실체의 수분함량은 균주에 따라 약간의 차이는 있으나 탄산가스 농도의 증가에 따라 수분함량이 감소되었다. This study was performed to determine the optimal concentration of carbon dioxide, which effects mushroom growth and yield. It was shown that the periods for fruiting initiation, growth and harvest of Flammulina velutipes were increased when the CO₂ concentration was raised. In general, those characteristics were less affected in brown strains than in white ones. Especially brown strain ASI4103 was susceptible to changes in CO₂ concentration. Yields per bottle and individual mushroom weight also decreased in most strains when CO₂ levels increased. We were unable to designate any tendency in the number of fruiting bodies due to the large variation within each respective strain. Finally, water contents in the fruiting bodies were found to decline under high CO₂ concentrations.

Bacillus sp, 에 의한 Pullulanase 생산

閔潤植 忠州大學校 1995 한국교통대학교 논문집 Vol.30 No.2

The optimum cultural temperature and time for the pullulanase production by Bacillus sp. were 35℃ and 48hrs, respectively. The addition of egg albumin and casein to the basal medium, respectively, increased the enzyme production. The enzyme was partial purified by ammonium sulfate fractionation and DEAE-cellulose column chromatography. The specific activity of the partial purified enzyme was 82.3U/mg protein and the yield of enzyme activity was 62.1%. The optimum temperature and pH for enzyme production were 50℃ and pH 6.5, respectively. The partial purified enzyme was greatly inhibited by Ag+, Hg²+.

꾸지뽕 나무의 성분분석에 관한 연구

민윤식 忠州大學校 2005 한국교통대학교 논문집 Vol.40 No.2

The Obtained Results from the Experiment are as Follows : 1. The proximate composition was composed of crude fiber 48.9%, Ash 11.19%, Total sugar9.84%, crude fat 8.5% moisture 4.8%. 2. The mineral contents was composed K. Ca. Na was inspect 315.4, 315.6, 80.2㎎%,Mg, Fe, Zn was inspect 50, 5.7, 1.4㎎% 3. The vit contents was composed vit A 5.530 IU, B_(1) 1.4 IU, B_(2) 1.8 IU, C 39 IU, Niacin 1.2 IU 4. The amino acid was composed glutamic acid and aspartic acid was inspect 3.5-4.5g/l00g, 2.4-3.1g/100g 5. The free sugars was composed glucose 2.84, fructose 0.26%, galactose 0.23%, sucrose 0.22% 6. The fatty acid was composed linolenic acid 33.10%, palmitic acid 30.99% linolenic acid 12.55%, oleic acid 3.87%

映像理解를 爲한 知義 抽出에 關한 硏究

郭允植 忠州大學校 1993 한국교통대학교 논문집 Vol.28 No.-

This paper describes the knowledge extraction for image understanding in knowledge-based system. The current set of low level processes operate on the numerical pixel arrays, to segment the image into region and to convert the image into directional image, and to calculate feature for these regions. The current set of intermedate level processes operate on the results of earlier knowledge source to build more complex representations of the data. We have grouped into three catalogues:feature based classification, geometric token relation, perceptual organization and grouping.

형광백혈구 안저촬영술에서 플로레신 염색의 안정성과 형광림프구의 분리

김윤희,강필성,김강주,양연식,김재덕 圓光大學校 醫科學硏究所 1998 圓光醫科學 Vol.14 No.1

Recently, retinal blood flow has been studied with several methods, targeted dye delivery method, fluorescent vesicle system, laser Doppler velocimetry, acridine orange staining method. Authors presented a new method, fluorescein leukocyte angiography using a scanning laser ophthalmoscope which include external staining of leukocyte with fluorescein dye and reintroduce the fluorescent leukocyte into the blood flow. Authors tried to check security of external fluorescein staining of leukocytes and separation of fluorescent lymphocytes from whole blood and supernatant fluid using Ficoll-Paque, with cell viability, leukocyte recovery rate and erythrocyte contamination rate. There was no significant difference in cell viability, leukocyte recovery rate and erythrocyte contamination rate between fluorescein staining group and non-staining group. Fluorescent lymphocytes could be separated from whole blood and supernatant solution after gravity sedimentation with 6% hetastarch and the gravity sedimented group had low erythrocyte contamination rate than whole blood group(p≤0.05). In conclusion, external fluorescein staining procedure of leukocyte during fluorescein leukocyte angiography could be performed without cell injury compared to non-fluorescein staining group and fluorescent lymphocyte could be separated from whole blood and supernatant fluid after gravity sedimentation.

內部會計管理制度의 導入에 관한 硏究

황윤식,김석현,박정숙 東亞大學校 經營問題硏究所 2006 經營論叢 Vol.27 No.-

The United States Government established Sarbanes- Oxley Act in July 2002 because of the accounting fraud of Enron and Worldcom. The PCAOB(Public Company Accounting Oversight Board) published Auditing Standard No. 2 covering the auditor' s reporting on the ICFR(Intemal Control over Financial Reporting) in March 2004. These regulations were established on the basis of COSO framework. The accounting reform regulations have been introduced for accounting transparency in the aftermath of the foreign exchange crisis in late 1997 in Korea. The Korean Government established the Management’s Assessment Standards for the ICFR and the Accountant’s Review and Reporting Standards for the ICFR in June 2005. The purpose of this study is to find problems and provide future directions to improve the ICFR in Korea by making a comparison between the United State ICFR and the Korea ICFR. And these results of this study are expected to provide useful information regarding the introduction of ICFR in Korea.