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바이모달 트램의 후진주차보조 알고리즘 개발에 관한 연구
최성훈(Seonghoon Choi),박태원(Taewon Park),이수호(Sooho Lee),문경호(Kyeongho Moon) 한국자동차공학회 2009 한국 자동차공학회논문집 Vol.17 No.5
The bi-modal tram is under development as a new public transportation. The features of the tram are an extended wheel base and its length. This features result in difficulties for drivers on maneuvering the tram. Therefore, the all wheel steering system is applied to the articulated vehicle. The AWS system enables the vehicle to steer all the rear wheels independently and improves its driving characteristics. However, the bi-modal tram has a problem to move backward in the limited place because of its geometric feature and the AWS system. Hence, the reverse parking assistant algorithm for articulated vehicle is developed to solve the problems of the reverse parking. Using the vehicle model which includes the reverse parking assistant algorithm, the dynamic analysis is performed for several parking cases. By the result of the analysis, the stability and validity of the reverse parking assistant algorithm is verified.
Thyroid cancer among female workers in Korea, 2007–2015
Seonghoon Kang,Jinho Song,Taehwan Koh,One Park,Jong-Tae Park,Won-Jin Lee 대한직업환경의학회 2018 대한직업환경의학회지 Vol.30 No.-
Background: Prevalence of thyroid cancer has been increasing rapidly worldwide, especially among women. There has been a debate as to whether such an increase represents consequences of over-diagnosis or a true increase. To find the occupational risk of Korean female workers in different industry sectors, we analyzed the data of Korean female workers. Methods: National Female Worker Cohort data that contain information on total female workers were used for our analysis of prevalence of thyroid cancer (C73 according to KCD-5, 6 code) derived from National Health Insurance data. By combining industrial codes from National Health Insurance Service and those from Korea Workers’ Compensation and Welfare Service, the classification of industrial codes became to consist of the total of thirty three representing both non-office (NO) and office (O) categories. Both an internal comparison among female workers within the cohort and an external comparison to compare female workers with Korean general female population were carried out. Results: Among 149,258 female workers, 2,641 cases of thyroid cancers were identified. Differences in prevalence of thyroid cancer between female workers (40.5%) and general Korean female population (32.6%) were observed; however, the differences in prevalence of thyroid cancer between NO workers and O workers were not apparent. An analysis involving workers in Financial and insurance activities sector revealed that, standardized prevalence rate (SPR) of both NO (2.96, 95% CI = 2.01.4.20) and O workers (3.68, 95% CI = 3.10.4.33) increased significantly and that an AOR (adjusted odds ratio) increased marginally (1.38, 95% CI = 0.97.1.96). Further, when stratified in respect to the duration of employment, an AOR of female workers having been employed for more than 8 years showed a significant increase (1.63, 95% CI = 1.07.2.49). Conclusions: Female workers had a higher risk of thyroid cancer than general female population but the difference between NO workers and O workers was not found to be significant in most industrial sectors. Further studies using data with information regarding specific occupational exposures are needed.
NANOCAD Framework for Simulation of Quantum Effects in Nanoscale MOSFET Devices
Seonghoon Jin,Chan Hyeong Park,In-Young Chuug,Young June Park,Hong Shick Min 대한전자공학회 2006 Journal of semiconductor technology and science Vol.6 No.1
We introduce our in-house program, NANOCAD, for the modeling and simulation of carrier transport in nanoscale MOSFET devices including quantum-mechanical effects, which implements two kinds of modeling approaches: the top-down approach based on the macroscopic quantum correction model and the bottom-up approach based on the microscopic non-equilibrium Green’s function formalism. We briefly review these two approaches and show their applications to the nanoscale bulk MOSFET device and silicon nanowire transistor, respectively.
Park, Myungjoon,Park, Junsik,Choi, Joungcheul,Kim, Jinwoo,Jeong, Seonghoon,Seung, Manho,Lee, Seokkiu,Kim, Jingook [Institute of Electrical and Electronics Engineers 2019 IEEE transactions on electromagnetic compatibility Vol.61 No.1
<P>Voltage noise and operation errors in an integrated circuit (IC) due to electrostatic discharge (ESD) events were measured, validated, and analyzed in this paper. A simplified structure of a laptop personal computer and an IC with a D-type flip-flop were designed and manufactured for the experimental tests. Every signal input to the IC was simultaneously measured during the ESD tests, and validated with the simulated results using a full-wave solver and a simple circuit model. Next, SPICE simulations were conducted using the measured voltages with ESD tests. The output waveforms and the statistical occurrence ratios of the operation failures found from the SPICE simulations were compared with measured values. Furthermore, the effects of decoupling capacitors on the IC operation failures due to ESD were investigated.</P>
Seonghoon Jeong,Gitae Park,Bongyoon Kim,Joonoh Moon,Seong‑Jun Park,Changhee Lee 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.10
This study investigates the relationship between the mechanical characteristics and microstructural transitions in heat-affectedzone (HAZ) of various austenitic Fe–Mn–Al–C lightweight steels. The analysis was conducted on the simulated HAZ sampleswith various post-weld heat treatment (PWHT) conditions. The base steel was prepared via vacuum induction melting, hotrolling, and solution treatment prior to water quenching. Gleeble simulator was used to manufacture the simulated HAZs, andthe samples were subjected to PWHT with various durations by electric furnace. To understand the effects of thermal historyon the mechanical characteristics, ultimate tensile tests, micro-hardness tests, and cryogenic Charpy impact toughness testswere conducted, and microstructural analyses were conducted by optical microscopy, scanning electron microscopy, X-raydiffraction analysis, and transmission electron microscopy. The experimental results confirmed the influence of Al contenton the austenitic Fe–Mn–Al–C lightweight steels, which promotes κ-carbide precipitation, both in the austenite matrix andgrain boundaries, thereby increasing the strength and hardness while decreasing the ductility and toughness. Each mechanicalproperty showed a linear relationship with the growth kinetics of the κ-carbide particles. However, abnormal coarsening ofthe inter-granular κ-carbide during welding and PWHT caused severe embrittlement, regardless of thermal history, by actingas inter-granular crack propagation channels. The experimental results suggest that Fe–Mn–Al–C lightweight steels shouldbe developed with controlling the alloying elements to overcome HAZ discontinuity and mechanical property degradationoccurring by intra- and inter-granular κ-carbide precipitation.
시나리오 접근을 통한 일반인과 법조인의 양형 인식 비교 : 실형선고의 적절성을 중심으로
박성훈 ( Seonghoon Park ),강태경 ( Taegyung Gahng ) 대한범죄학회 2016 한국범죄학 Vol.10 No.3
국가형벌권의 이념과 목적은 양형과정에서 구체적으로 실현된 다는 점에서 양형에 대한 국민인식 연구는 매우 필요한 분야라고 할 수 있다. 양형과정에서 어떤 요인의 영향력이 중요한지를 파악하는 것은 양형을 결정하는 주체가 어떤 요소를 어떻게 판단하는지에 따라 양형결정의 양상이 달라질 수 있다는 점에서 중요한 연구주제이다. 이 연구의 목적은 일반인과 법조인이 중요하게 인식하는 양형요소의 차이가 존재하는지, 일반인과 법조인 간 양형 인식의 차이가 서로 다른 양형결과를 가져오는지를 알아보는 데 있다. 이를 위해 이 논문에서는 일반인을 대상으로 청소년대상 강간, 아동대상 성추행, 음주운전으로 인한 사망 등 현실에서 논란이 자주 발생하는 형사사건에 관한 시나리오를 제시하고, 각 범죄사건별로 적정한 형벌유형에 대한 양형 인식을 조사하고, 그 결과를 법조인의 양형 인식 조사 결과와 비교하였다. 주요한 분석 결과는 첫째, 전반적으로 모든 사건에서 일반인과 법조인 모두 피해자와의 합의여부를 양형결정에서 중요한 요소로 고려하였다. 다만, 일반인보다는 법조인이 합의여부를 더 중요하게 고려하는 경향이 발견되었다. 둘째, 아동대상 성추행사건에서는 일반인과 법조인 모두 추행정도, 피해정도, 공탁여부, 합의여부 등을 적정 형벌유형의 결정에 중요한 요소로 고려하였다. 그러나 아동대상 성추행 사건의 적정형벌로 실형을 선택하는 비율은 일반인보다 법조인에서 더 낮은 경향을 보였다. 그리고 추행정도, 피해정도와 같은 기타 양형요소의 영향이 공탁여부 및 합의여부에 따라 조건적으로 영향을 미칠 뿐만 아니라 그 영향력이 두 집단 간 적정형벌 유형의 결정에 동일하게 작용하지 않는 다는 사실도 발견하였다. 셋째, 음주운전으로 인한 교통사고 사망사건에서는 피해자의 과실여부가 양형판단에 중요한 요소임을 확인할 수 있었고, 이 경우에도 적정 형벌유형의 결정에 있어 법조인은 일반인보다 합의여부를 더 중요하게 고려하는 것으로 나타났다. 분석결과를 종합해 보면, 범죄사실에 관한 충분한 정보가 주어 진다면 일반인과 법조인 간에 양형인식은 서로 유사해지지만, 합의여부와 같이 양형결정에 중요한 요소를 고려하는 정도에 있어서는 일반인에 비해 법조인이 훨씬 더 민감하게 반응한다는 사실을 경험적으로 확인할 수 있었다. This research studied the differences of opinions about sentencing between the public and judicial officers by analyzing their responses to three criminal scenarios such as raping juveniles, sexual harassing 13 or younger people, and driving under influence resulting in victim`s death. First, since settlement with a victim determines the actual sentence in the case of a rape of adolescents, both the public and judicial officers regarded agreement with victim very important. However, most of judicial officers pronounced an actual imprisonment sentence if settlement with the victim was not reached, they put more stress on reaching agreement with the victim than lay people did. Laymen and judicial officers appeared to have the same view for the offender depositing significant amounts of money after having had failed attempt to reach an agreement with the victim in a genuine effort to bring restoration for the inflicted harm. Second, in the case of sexual molestation against victims under 13, both the public and judicial officers tended to give actual imprisonment sentence after considering sentencing factors such as the degree of molestation and the resulting damage, deposits of significant amounts, agreement with the victim reached, etc. However, compared with judicial officers`, lay people`s selection of actual sentence tended to increase in a linear form as sentencing factors are added. Third, in the case of traffic accident deaths due to drunk driving, real imprisonment sentence tended to increase in accordance with agreement reached with the victim and deposits made when the fault of the victim (jay walking) is considered as the same determinant factor. However, in the case of the victim being more at fault (failure to keep eyes forward), the rate of the actual imprisonment sentence chosen gets lower than when the victim`s fault is taken into account. This downward trend is more pronounced in judicial officers than in the public.