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- 저자 : 임형준(Hyeong Jun Lim) (검색결과 6 건)
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Nord2000의 철도차량 분류기준에 따른 소음지도 결과 비교
임형준(Hyeong Jun Lim),박재식(Jae Sik Park),함정훈(Jung Hoon Ham),박상규(Sang Kyu Park) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.4
Recent development of related technologies and efficient utilization of the entire country for the purpose of railway construction, and plans are being accelerated. the railway noise has been improved by increasing the high speed railway station, and accelerating the existing trains. Nord2000 which is an overseas noise prediction equation could not be applied directly to the domestic railway vehicles. So the specific vehicles in the Nordic countries which is a similar specification to domestic trains should be selected. Nord2000s accuracy was compared to Schal103, CRNs. Prediction of Ground impedance and Roughness class carried out at different. In this paper, the result of selected vehicles for Nord2000 was as follows. S-laX2 was for express trains, N-*2c-3b was for Mugunghwa, S-Pass/wood was for Saemaul, N-4a was for freight trains, N-3a was for subway. the calculation time for Nord2000 took longer than others. in addition, Ground absorption was indispensable to calculate a noise map for Nord2000. As a result, CRNs prediction noise levels at Wonju-si was closest to the measurements. However, the predicted noise levels of Nord2000 was the most accurate.
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유연기판을 위한 UV/Thermal 하이브리드방식 나노임프린트 시스템
임형준(Hyung-Jun Lim),이재종(Jae-Jong Lee),최기봉(Kee-Bong Choi),김기홍(Gee-Hong Kim),안현진(Hyun-Jin Ahn),류지형(Ji-Hyeong Ryu) 한국생산제조학회 2011 한국생산제조학회지 Vol.20 No.3
An UV/thermal hybrid nanoimprint lithography system was designed and implemented for the pattern transfer to flexible substrates. This system can utilize a plate stamp, roll stamp, and film stamp. For all cases of using those stamps, this system is also switchable an UV or thermal nanoimprint lithography mode. This paper shows how to design the heating and UV curing plates and proposes how to change them easily. Because the pressure condition and the speed of the press roller varies by the characteristics of the stamp and substrate, all the parameters related to the nanoimprint lithography have to adjustable. Some transferred patterns are shown in this paper to verify the performance of the hybrid nanoimprint lithography system. The flexible substrates with nano-scale patterns on them will be key components for next generation technologies such as flexible displays, bendable semi-conductors, and solar cells.
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임형준(Hyung Jun Lim),이재종(Jae Jong Lee),최기봉(Kee-Bong Choi),김기홍(Gee Hong Kim),류지형(Ji Hyeong Ryu) Korean Society for Precision Engineering 2011 한국정밀공학회지 Vol.28 No.4
The NIL processes have been studied to implement low cost, high throughput and high resolution application. A RNIL(roller NIL) is an alternative approach to flat nanoimprint lithography. RNIL process is necessary to transfer patterns on flexible substrates. Compared with flat NIL, RNIL has the advantages of better uniformity, less pressing force, and the ability to repeat the patterning process continuously on a large substrate. This paper studies the design, construction and verification of a thermal RNIL system. The proposed RNIL system can easily adopt the flat shaped hot plate which is one of the most important technologies for NIL. The NIL system can be used to transfer patterns from a flexible stamp to a flexible substrate, from a flexible stamp to a Si substrate, and from a roller stamp to a flexible substrate, etc. Patterning on flexible substrates is one of the key technologies to produce bendable displays, solar cells and other applications.
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국내 라돈 취약가구에 대한 주거공간의 실내 라돈 농도에 관한 연구
주덕현,박기호,정희원,임형준,복동석,윤동원,민경환,문경덕,김정운,이지민,최원용,김성윤,Zoo, Duck Hyun,Park, Ki Ho,Jeong, Hui Won,Lim, Hyeong Jun,Bok, Dong Seok,Yun, Dong Won,Min, Kyung Hwan,Mun, Kyung Deok,Kim, Jeong Un,Lee, Ji Min,Choi, W 한국환경보건학회 2015 한국환경보건학회지 Vol.41 No.2
Objectives: The purpose of this research was to examine radon exposure in terms of the relationship between the living environment and indoor radon concentrations among vulnerable households. Methods: Nationwide, 1,129 subjects were selected using personal questionnaires for adequately understanding the living environment, installation of E-PERM radon gas detectors, and investigation of the structure of the housing. Results: The mean concentration of indoor radon for all subjects was $130.2Bq/m^3$ (GM=101.7), and a total of 438 subjects (38.8%) exceeded the recommended standards ($148Bq/m^3$) for public facilities by the Ministry of the Environment. By location, the highest concentrations ($164.3Bq/m^3$, GM=124.1) were seen in North Chungcheong Province. In the case of the Seoul/Gyeonggi Province metropolitan area, they showed $125.6Bq/m^3$ (GM=105.1) and $118.9Bq/m^3$ (GM=96.5), respectively. By type of housing, indoor radon concentrations in single-family housing were higher than in row/multi-family housing (p<0.01). Although indoor radon concentrations raised in accordance with year of construction (p<0.05), the difference between indoor radon concentrations in underground residences was not observed to be statistically significant (p=0.633). Conclusion: More studies are necessary in the future regarding the difference in indoor radon concentrations that may occur due to different of types of indoor construction, building materials, and the amount of building materials.
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비유기중의 소유방염에 대한 항균펩타이드(Buforin Ⅱb)의 효능실험
김인송,권성균,임형준,이완규 한국수의공중보건학회 2002 예방수의학회지 Vol.26 No.3
Recently, a novel antimicrobial peptide including Buforin II has been emphasized to kill multi-drug resistant bacteria and avoid promoting multi-drug resistance. This study evaluated the efficacy of an antimicrobial peptide (Buforin IIb) on bovine mastitis. Based on the Minimum inhibitory concentration(MIC, 4 g/ml) of Buforin IIb, syringes were made five concentration(MIC×10, ×50, ×100, ×300, and ×500). Thirty three cows(38 quarters) with bovine mastitis were selected using California mastitis test and grouped in dependant on drug concentration and treatment duration. Each group treated by intramammary infusion twice a day for 3 5 days. The milk samples of 5 groups were aseptically collected from quarters at 0, 3, 7 and 14 days, and 2 groups were collected at 0, 5, 9 and 14 days after first treatment. Collected samples were used for bacterial culture and somatic cell count. Bacterial number(log_(10) mean CFU/ml) was decreased in dependant on drug concentration and extending treatment duration. In group D(MIC×300), bacterial number was decreased from 4.59±0.10(day 0) to 2.89±1.37(day 3), 4.04±0.33(day 7), and 4.19 ± 0.10(day 14), respectively(p 0.05). Bacterial number of B2(MIC×50, 5 days treated) is decreased, approximately 10%, than group B1(MIC×50, 3 days treated). Somatic cell count of group D was slightly decreased from 11,100(×10³)(day 0), to 7,386(×10³)(3 day), 6,886(×10³)(day 7), and 9,661(×10³)(day 14). Staphylococcus spp., was the most common isolate, was bacteriologically cured 100% by Buforin IIb treatment. Overall results indicate that Buforin IIb could have possibility to cure bovine mastitis, if higher concentration over experimental concentration were treated with extending treatment duration.
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