Shield Disk 상의 Ag-Cu 공정계 합금 도금기술 개발

윤경도,차동관,심기종,민봉기,최순돈,이상기 嶺南大學校 工業技術硏究所 2003 工業技術硏究所論文集 Vol.31 No.1

The composition and the microstructure of the Ag-Cu alloy electrodeposits electroplated in Succinimide bath were investigated varying the electrolysis conditions such as bath composition, current density and additive agents etc. The cathode overpotential increased with the increase of Succinimide concentration and current density ratio in the bath. The Ag content of the alloy deposits decreased with the increase of current density and pH and temperature in the bath. The optimum condition for 78wt.%Ag-22wt.%Cu code position alloy is an follows : pH10(adjusted by NH_4OH), 0.03M AgNO_3, 0.27M Cu(NO_3)_2 3H_2O, 0.5M Succinimide in bath and 3.5A/dm^2∼5.5A/dm^2 current density.

일부 도시지역 인문고교생의 체격과 영양상태에 관한 연구

윤태영,최중명,박순영,유동준,김형석,구도서,박양원 慶熙大學校 醫科大學 1986 慶熙 醫大 論文集 Vol.11 No.1

17世紀 프랑스 建築의 新ㆍ舊論爭과 그 影響에 關한 硏究

尹道根,申在淳 弘益大學校 1988 弘大論叢 Vol.20 No.2

Today, we realize that modern buildings and post-modern buildings are rely heavily on an insistent use of elementary geometrial shapes. Some, like the square, are easy to draw and others, like the circle and the triangle, or solids based on them like the cylinder, are rather more awkward to manage. Yet the worst contemporary architects and industrial designers will use them. The idea has got about that elementary geometrical shapes are in some way better than more complicated shapes. Generally Speaking, we owe this tendency to Neo-Classical architect. But it goes back much further. The objectives of this report are to analize the process that have been developed since seventeenth century, and this tendency can not equalize with original conception of Platonism.

파이프라인 시스템 합성을 위한 스케쥴링

朴道淳,尹薰炳 弘益大學校 科學技術硏究所 1995 科學技術硏究論文集 Vol.6 No.-

Scheduling is an important step which decides designed area and execution time of result hardware. Pipelining is a technique for increasing execution speed and resource utilization of designed hardware in case of executing much successive data. In this paper, we present an pipeline scheduling algorithm which decreases search space in getting through with the optimal solution. This algorithm can be used with other constructive scheduling algorithms. Joining with a constructive algorithm is showed in this paper. This algorithm also can be used to decrease search space in simulated annealing scheduling algorithm.

일부 농촌지역 청소년층의 성장발육과 영양상태에 관한 연구

김종진,윤태영,최중명,박순영,구도서,박양원 慶熙大學校 1987 論文集 Vol.16 No.-

In order to assess the physical growth and development, and nutritional status of primary, middle and high school students in the town of Samchoek, Kangwon province as rural area, physiques of 3,793 persons(Male; 1,884. Female; 1,909)were measured from May 1 to May 31 in 1986 and various physical and nutritional indices related to them were calculated.

유도 '되치기 본'의 개선 방안에 관한 연구

김의환,김도준,김규수,김관현,김종달,최종삼,조용철,박순진,윤익선,안병근,정 훈,김미정,한성철 龍仁大學校 武道硏究所 1999 武道硏究所誌 Vol.10 No.1

The purpose of this study was to reform practically a Korean Judo's Doechigi-Bon(Forms of Counterattack, judo's Gaeshi no Kata, Judo's Uradori no Kata, Judo's Gonosen no Kata) that was established in 1955 Korea, according to changing of techniques by Judo's modernization, in order to have Judo's carefulness and systematic diffusion. Reform procedure of Judo's Doechigi-Bon was 1st stage, Questionnaire survey 303 judokas, 2nd stage, Technical seminar by judo experts(12 judo professor) 4 times, 3rd stage, wording report for reform, 4rd stage, Discussion and judgement of Teaching and Judgement commission of Korean judo Association(KJA), 5th stage, Public hearing for reform in KJA, 6th stage, Report and decision of board of directors in KJA, 7th stage, public publication of Judo News(No.53) in KJA. Basic principle of reform of Judo's Doechigi-Bon were as table 1. Table 1. Basic principle of reform of Judo's Doechigi-Bon ------------------------------------------------------------------------------- Items Reformed Key Points of Judo's Doechigi-Bon ------------------------------------------------------------------------------- 1. Structure 1) Grand classification : Classified by 3 parts(1,2,3Gyo) 2)Medium classification : Te waza, Goshi waza, Ashi waza devided per each part(Gyo) 3)Sub-classification : Classified five techniques per each part(Gyo) 2. Contents 1) Selected established techniques as possible 2) Considered rationalty and overlapping of counterattack techniques 3. Decision of Conterattack techniques 1) Refered to results of Basic Questionnaire survey 2) Priority to decisions of Judo expert technical seminar -------------------------------------------------------------------------------- Reformed Korean Judo's Doechigi-Bon(Forms of Counterattack techniques-KJA, 1999) are as follows: 1. Gyo; ① Uki otoshi -> Uchi mata ② Harai goshi -> Harai goshi gaeshi ③ O soto gari -> O soto gake ④ Ko uchi gari -> Sasae tsurikomi ashi ⑤ O uchi gari -> Ko soto gari 2. Gyo; ① Ippon seoi nage -> Okuri eri jime ② Tsuri domi goshi -> Uki waza ③ Okuri ashi harai -> Okuri ashi harai ④ Ko soto gari -> Tai otoshi ⑤ Hiza guruma -> Hiza guruma 3. Gyo; ① Kata guruma -> Sumi gaeshi ② Tai otoshi -> Ko soto gari ③ Hane goshi -> Harai tsurikomi ashi ④ Uchi mata -> Tai otoshi ⑤ Tomoe nage -> O uchi gari

Host Plant Preference of Alfalfa Weevil, Hypera postica Gyllenhal (Coleoptera: Curculionidae), against Different Gyllenhal (Coleoptera: Curculionidae), against Different

Soon-Do Bae,Huyn-Ju Kim,Young-Nam Yoon,Beyong-Ryeol Choi,Min-Hee Nam 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05

Alfalfa weevil, Hypera postica Gyllenhal, is regarded as one of the most important insect pests on Chinese milk vetch and hairy vetch. The insect usually feed on leaves, stems and pods of the green manure which causes severe reduction of biomass. This study was conducted to observe the occurrence of H. postica larva and adult on Chinese milk vetch in 2009 to 2010, and to evaluate host plants preference of 11 different seedlings in 2010, Milyang, Korea. Occurrence of H. postica larvae on Chinese milk vetch was observed to increase from early April clearly and its peak population was showed during middle to late April. The 1st generation of newly emerged adult of H. postica was appeared on 20th May. Newly emerged H. postica adult was fed on green manure such as Chinese milk vetch and hairy vetch as well as various seedlings located at nearby upland. And then the insects were migrated into aestivating places in middle to late of June. Thus, host plant preference of H. postica adults were evaluated with 11 different seedlings using transparent acrylcage and at Chinese milk vetch field. As a result, H. postica adult preferred on Chinese cabbage, followed by soybean, kale, foxtail millet and proso millet. The damaged rating of seedlings were shown to have the same trend with adult occurrence. In particular, few H. postica adults were occurred on eggplant, lettuce, corn, crown daisy and peanut, and thereby those crops were regarded as non-preference plants due to the absence of damage. These informations can be used by upland farmers who sowing from late May to early June for effective management of H. postica.

Preparation of resistant starch/poly(vinyl alcohol) blend films with added plasticizer and crosslinking agents

Yoon, Soon-Do,Chough, Sung-Hyo,Park, Hye-Ryoung Wiley Subscription Services, Inc., A Wiley Company 2007 Journal of applied polymer science Vol.106 No.4

<P>We report on the physical properties of films synthesized with native corn starch (NCS) and resistant starch (RS4) prepared with NCS. NCS and RS4/poly(vinyl alcohol) (PVA) blend films were synthesized with a mixing process and casting method. Glycerol (GL) and citric acid (CA) were used as additives. Glutaraldehyde (GLU) was used as a crosslinking agent of the films. RS4 was synthesized with sodium trimetaphosphate and sodium tripolyphosphate as a crosslinker. Then, the RS4 thus synthesized was confirmed by the pancreatin–gravimetry method, swelling power, differential scanning calorimetry, and X-ray diffraction. The tensile strength, elongation, swelling behavior, and solubility of the films were measured. The results of the measurements indicated that the RS4-added film was better than the NCS-added film. In particular, the RS4/PVA blend film with CA as an additive showed physical properties superior to those of the other films. Also, the physical properties with GLU added as a crosslinking agent to the films were investigated. With increasing GLU contents, the tensile strength increased but the elongation, swelling behavior, and solubility values of the GL-added and CA-added films decreased. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007</P>

Fabrication and photocatalytic properties of ceramic ZnS nanocomposites

Soon-Do Yoon,Jeong Woo Yun,Yeon-Hum Yun 한양대학교 세라믹연구소 2020 Journal of Ceramic Processing Research Vol.21 No.4

Ceramic ZnS nanocomposites were prepared by mechanical processing and one-step heat sintering with powder mixtures offly ash, waste glass, and ZnS (template-free hydrothermal method manufacturing). Chemical durability and morphologicalcharacteristics of heat-treated samples at 800 oC with/without acid treatment were evaluated. The photocatalytic activities wereestimated with methyl orange (MO), methylene blue (MB), acetaldehyde (ATA), and 2,4-dichlorophenoxyacetic acid (2,4-D) asphotodegradation targets. Crystallization behaviors of the prepared ceramic ZnS nanocomposites were investigated using Xraydiffraction (XRD), field emission-scanning electron microscopy (FE-SEM), and energy dispersive X-ray spectrometry(EDS). In addition, compressive and bending strength as mechanical properties were evaluated. Ceramic ZnS nanocompositeswere found to showed improvement in optimal photocatalytic reaction and physical properties regardless of acid treatmentwhen the amount of ZnS nanoparticles was increased from 7.0 to 25.0 wt%. Degrees of photocatalytic decomposition of MO,ATA, 2,4-D, and MB by acid treated ceramic ZnS nanocomposites containing 25 wt% ZnS were about 0.185, 0.121, 0.216,0.236, respectively, after UV irradiation for 180 min.

Photocatalytic properties of ceramics TiO2 nanocomposites from waste resources

Soon-Do Yoon,이정환,Yeon-Hum Yun 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.2

Ceramics TiO2 nanocomposites were prepared by using titanium oxide (TiO2) nanoparticles, fly ash from the thermal powerplant and the mixed waste glass powder. We applied a mechanical milling method and thermal reaction in this process. Thephotocatalytic activities were estimated for methyl orange (MO), acetaldehyde (ATA), 2,4-dichlorophenoxyacetic acid (2,4-D),and methylene blue (MB) as photodegradation targets. Crystallinity, morphological properties, and chemical compositions forprepared ceramics TiO2 nanocomposites were also observed by X-ray diffraction (XRD), field emission-scanning electronmicroscopy (FE-SEM), and energy dispersive X-ray spectrometer (EDS). In addition, density, compressive strength, bendingstrength and chemical durability were measured to characterize the physicochemical properties of TiO2 nanoparticle contents (0-20 wt%). It was verified that addition of TiO2 nanoparticles considerably improves the physicochemical properties of theprepared nanocomposites samples. With increased TiO2 nanoparticle content, the photocatalytic activities of the ceramics TiO2nanocomposites for photodegradation target materials increased under UV light irradiation. The degree of photocatalyticdegradation of MO, ATA, 2,4-D, and MB in the ceramics TiO2 nanocomposites improved to about 0.264, 0.141, 0.302, and 0.368,respectively, after the UV irradiation for 240 min when 20 wt% TiO2 nanoparticle was added. In addition, the photocatalyticdegradation rate of photodegradation target materials was evaluated using the pseudo-first-order kinetics proposed by Lagergren.