공공고용서비스의 디지털화, 주요 현황 및 과제 : 해외사례를 중심으로

전용석 한국고용정보원 2021 고용이슈 Vol.- No.-

보건의료 R&D 효율성 제고를 위한 TRA(Technology Readiness assessment)

전용운 한국경영과학회 2011 한국경영과학회 학술대회논문집 Vol.2011 No.5

미국 자율주행법(Self Drive Act)의 주요내용 및 시사점

전용일,유요안 전북대학교 부설법학연구소 2017 法學硏究 Vol.54 No.-

The era of self-drive, which can be seen in science fiction (SF) movies, is gradually coming to reality. Along with the advent of the era of the so-called “fourth industrial revolution,” countries around the world are raising new scientific and technological industries such as Augmented Reality, Internet of Things, Drones, Autonomous driving and Hydrogen-electric vehicles. Autonomous driving that uses various forms of cutting edge technology is close to becoming commercialized, which has become one of the biggest areas of concern due to the ubiquitous nature of automobiles today. More specific reasons for our interest in autonomous vehicles are that we expect them to have a huge impact on society through significant reduction of accident occurrence compared to direct operation, smooth flow of traffic and increase in fuel efficiency through system control, benefits of vehicle use by the socially disadvantaged (the disabled, the elderly, the sick, the minor, etc.), reduction of pollutant emissions due to increased fuel efficiency, increase of work productivity, and decrease of stress due to a reduction of driver’s role during operation. This is why technologically advanced countries such as UK, Germany, USA, and Japan are focusing on research and development of autonomous vehicles and autonomous driving infrastructure. In addition to this technology promotion, those countries are also racing for institutional, legal, and administrative support. Korea, on the contrary, still needs more technological, legal, and institutional arrangements to catch up to those countries. The Act only provides systematic support for autonomous driving of autonomous cars through the Automobile Management Act. There is an urgent need for parliamentary legislation dealing with the promotion of self-drive technology development, establishment of a test bed for general road operation of self-drive vehicles to help safety assurance experiment and measures to help actively engage and support relevant companies and experts. Legislative actions that address various issues occurring after commercialization of self-drive vehicles must also be made. It would be important to analyze the main contents of the Self Driving Act, which passed the U.S. House of Representatives, to review the implications. 공상과학(SF) 영화 속에서나 볼법한 무인 자율주행시대가 점차 현실로 다가오고 있다. 이 른바 4차 산업혁명시대의 도래와 맞물려 세계 각국은 증강현실, 사물인터넷, 드론, 자율주행, 수소전기차 등 기존과 다른 새로운 과학기술산업 부흥에 열을 올리고 있다. 이들 가운데 자 율주행은 현실에 이미 가까이 와 있고, 일상생활에서 늘 접하고 있는 자동차 운행 때문에 단연 가장 큰 관심사이다. 자율주행자동차에 관심을 가지는 보다 구체적인 이유는 직접 운행 에 비해 사고발생의 현저한 감소, 시스템 제어를 통한 교통의 원활한 흐름과 이로 인한 연료 효율성 증가, 사회적 약자(장애인, 고령자, 병자, 미성년자 등)의 차량이용의 편익 제공, 연료 효율성 증가에 따른 오염원 배출의 감소, 운행시 운전자의 운전부담 감소로 인한 업무 생산 성 증가 및 스트레스의 감소 등 긍정적인 영향을 우리에게 제공해 줄 수 있다고 기대하기 때문이다. 이에 영국, 독일 등 유럽국가와 미국, 일본 등 기술 선진국을 중심으로 자율주행차량 및 자율주행 기반시설 연구 개발에 열을 올리고 있으며, 이러한 기술 장려뿐 아니라 개발된 자 율주행차량이 실재 운용될 수 있도록 법적⋅제도적 뒷받침을 위한 노력도 아울러 경주하고 있다. 이에 반해 우리나라는 이런 기술선진국들에 비해 기술적으로나 법적⋅제도적으로 준 비가 많이 부족한 실정이다. 법률로는 「자동차관리법」을 통한 자율주행자동차 시험운행에 관 한 제도적 뒷받침만 하고 있을 뿐, 기술개발의 촉진, 안전성 확보 실험을 돕기 위한 테스트배 드 구축 및 일반도로운행에 관한 사항들, 관련기업들의 적극적 참여와 지원을 돕기 위한 조치 등을 다룬 국회차원의 입법이 절실히 요구되고 있다. 뿐만 아니라 자율주행자동차의 상용 화와 산업분야 발전을 위한 법적 지원뿐 아니라 상용화 이후 운행과정에서의 발생되는 여러 문제들을 다룬 입법적 조치 또한 반드시 이루어져야 한다. 이를 위해 이번에 미국하원에서 통과된 자율주행법(Self Drive Act)의 주요내용들을 살펴보고 시사점을 도출해보는 것은 유 의한 일이 될 것이다.

외기조건변화에 따른 CHP 성능 해석

전용한(Jeon, Yong-Han),김종윤(Kim, Jong-Yoon),김남진(Kim, Nam-Jin),임경범(Lim, Kyung-Bum),서영호(Seo, Young-Ho),김기환(Kim, Ki-Hwan) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.8

본 연구에서는 가스터빈과 증기터빈, 열회수증기 발생 장치와 지역난방 열교환기로 열병합 발전 시스템을 구성하여 복수기가 없이 증기 터빈 중압단에서 추기된 증기와 배기 증기를 지역난방 열교환기의 열원으로 사용하는 추기 배압식을 적용하였다. 구성된 시스템에 대하여 필요로 하는 열부하량과 발전 출력 조건을 만족 시키기 위한 최 적 설계 성능 해석을 하였으며, 이와 함께 겨울철 외기 온도 조건의 변화에 대한 시스템의 부분부하 해석을 하였다. 해석을 위해 상용 프로그램인 Thermoflex를 사용하였다. 시스템의 해석 결과, 기준 조건에서 수요처의 요구를 만족 시키는 최적 설계를 기준으로 각 외기 온도 변화에 대한 부분부하 성능 해석의 결과를 얻을 수 있었다. 그 결과 열부하량이 고정된 상태에서, 가스터빈과 전체 시스템의 출력 은 외기온도가 감소함에 따라서 증가하였지만, 열원인 배기가스의 온도 감소로 인하여 증기터빈의 출력은 이와 반대 로 감소하는 경향을 나타내었다. 그러나 전체 시스템에서 가스터빈의 차지하는 비중이 크기 때문에 전체 시스템의 출 력의 경향은 가스터빈과 동일한 결과를 얻을 수 있었다. The co-generation system consisted of gas a turbine, a steam turbine, heat recovery steam generator and a heat exchangers for district heating was investigated in the present study. A back-pressure steam turbine (non-condensing type) was used. A partial load analysis according to the outdoor temperature in winter was conducted and optimal thermal load and power conditions was examined using the commercial computing software Thermoflex. As a result, under a constant thermal load, the power outputs of gas turbine and overall system increased as an outdoor temperature decreased. On the other hand, the reduction in exhaust gas temperature led to the decrease in output of steam turbine. Considering the portion of gas turbine in overall system in terms of the power output, it can be known that the tendency in power output of overall system was similar to that of the gas turbine.

패널 VAR 모형을 이용한 지역별 양식넙치 산지가격의 동태적 인과관계 분석

전용한 ( Yong-han Jeon ),남종오 ( Jong-oh Nam ) 한국수산경영학회 2021 수산경영론집 Vol.52 No.1

The purpose of this study is to identify the leading price between Jeju and Wando’s oliver flounder producer price and to analyze the dynamic effect of the regional producer price using the panel VAR model. In the process of analysis, it was confirmed that there are unit roots in the monthly data of Jeju and Wando’s oliver flounder producer price. So, in order to avoid spurious regression, the rate change of producer price which carries out log difference was used in the analysis. As a result of the analysis, first, the panel Granger causality test showed that the influence of the change rate of producer price in oliver flounder in Jeju was slightly larger than that in Wando, but it was found that each region all leads the change rate of the producer price in oliver flounder. Second, the panel VAR estimation showed that the rate change of producer price in Jeju and Wando a month ago had a statistically significant effect on the change rate of producer price of each region. Third, the impulse response analysis indicated that other regions are affected a little more than the same region in case of the occurrence of the impact on the error terms of the change rate of produce price in Jeju and Wando oliver flounder. Fourth, the variance decomposition analysis showed that the change rate of producer price in the two regions was higher explained by Jeju compared to Wando. In conclusion, it is expected that the above results can not only be useful as basic data for the stabilization of oliver flounder producer price and the establishment of policies for easing volatility but can also help the oliver flounder industry operate its business.

Deposition from pyroclastic surges partially blocked by a topographic obstacle: an example from the Ilchulbong tuff cone, Jeju Island, Korea

전용문,권창우,손영관 한국지질과학협의회 2011 Geosciences Journal Vol.15 No.2

Ilchulbong (Jeju Island, Korea) is a UNESCO World Heritage site that has outstanding coastal exposures of a tuff cone formed by a phreatomagmatic eruption of basaltic magma in a shallow sea. Wet fallout and subsequent resedimentation processes were predominant means of emplacement of the tuff cone. The marginal deposits of the tuff cone show, however, peculiar deposit features which resulted from the interaction of wet pyroclastic surges and a topographic obstacle, a ~30 m-high dissected scoria cone. These features include steeply dipping, inversely graded strata, a breccia bed composed of thin-laminated fine tuff clasts, and isolated tuff clasts within some lapilli tuff beds. These features indicate that the depositional system (underflow or bedload layer) and the transport system (overlying suspension current) of the pyroclastic surges underwent different responses upon colliding with the topographic obstacle. The coarse-grained materials in the depositional system were mostly blocked by the obstacle, producing a scree-like wedge of deposits containing inversely graded grain-flow strata. In contrast, the transport system was not significantly affected by the obstacle, maintaining its momentum and original flow direction after passing over the dissected scoria cone. Some of the fine-grained load in the transport system was, however, plastered onto the cliff wall. The plastered tuffs were later detached and fell from the wall, resulting in an intraformational breccia bed and exotic tuff clasts within some lapilli tuff beds. The studied site, located within a scenic World Natural Heritage site, can be utilized as an important geosite for the education of the processes which occur during the collision of a pyroclastic density current with a topographic obstacle and the different fates of the depositional and transport systems of a pyroclastic density current.

산업용 ISO 솔레노이드 밸브 특성 해석

전용식(Y. S. JEON),오영철(Y. C. OH),주민진(M. J. JU),조수정(S. J. JO),김동수(D. S. KIM) 한국유체기계학회 2008 유체기계 연구개발 발표회 논문집 Vol.2008 No.-

In this study, A special quality analysis and experiment for low power consumption type pneumatic ISO Solenoid valve was performed. And flow characteristics of the ISO Solenoid valve by stroke change was numerically investigated. As a result, it is shown that magnetic force (2.4N) is exerted enough to move poppet with 0.3㎜ stroke with 0.01 seconds of response time, and that there is no magnetic force emitted by yoke.

ISO 솔레노이드 밸브의 정특성 및 동특성 연구

전용식(Y. S. JEON),오영철(Y. C. OH) 한국유체기계학회 2009 유체기계 연구개발 발표회 논문집 Vol.2009 No.-

The technology of ISO Solenoid Valves is now considered as a core technology in the fields of the production line of semi-conductor chips and the ISO fluid chips for medical applications. And ISO Solenoid Valves, which operate by compressed air, are characterized by high speed response, great repeatability and that the pressure on the cross sectional area of poppet is kept constant regardless of the fluctuation of the pressure exerted on the ports. The primary objective of this study is to compare the optimally designed Solenoid Valve with the actually produced one and to design a power saving circuit which can highly improve the efficiency by providing optimal current according to mechanical load.

도로터널 화재시 대배기구 환기방식에서의 배연 연구

전용한(Yong-Han Jeon),한상철(Sang-Cheol Han),유지오(Oh-Ji Yoo),김남진(Nam-Jin Kim),서태범(Tae-Boem Seo),김종윤(Jong-Yoon Kim) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-

In this study it is intended to review the moving characteristics of smoke by performing visualization for the calculation of the optimal smoke exhaust air volume in case a fire occurs in tunnels where transverse ventilation is applied, and to obtain basic data necessary for the design of smoke exhaust systems by deriving optimal smoke exhaust operational conditions under various conditions. As a result of this study, when the critical velocity in the tunnel is 1.75 ㎧ and 2.5 ㎧, the optimal smoke exhaust air volume has to be more than 173 ㎥/s, 236 ㎥/s for the distance of the smoke moving which can limit the distance to 250m. In addition, in case of uniform exhaust the generated smoke is effectively taken away if the two exhaust holes near the fire region are opened at the same time.

도로터널 화재시 반횡류식 균일배기 환기방식에서의 최적배연 연구

전용한(Yong-Han Jeon),유지오(Oh-Ji Yoo),김남진(Nam-Jin Kim),서태범(Tae-Boem Seo),김종윤(Jong-Yoon Kim) 대한설비공학회 2009 설비공학 논문집 Vol.21 No.3

In this study it is intended to review the moving characteristics of smoke by performing visualization for calculation of the optimal smoke exhaust air volume in case a fire occurs in tunnels where transverse ventilation is applied, and to obtain basic data necessary for design of the smoke exhaust systems by deriving optimal smoke exhaust operational conditions under various conditions. As a result of this study, if it was assumed 0 critical velocity in the tunnel, the smoke exhaust air volume was limited within 250 meter in the road-tunnel disaster prevention indicator and the exhaust efficiency was from 55.1% to 95.8% in the result of this study. In case of oversized exhaust ports, the generated smoke is more than the case of uniform exhaust. When the critical velocity in the tunnel is 1.75 ㎧ and 2.5 ㎧, the optimal smoke exhaust air volume has to be more than 173 ㎥/s, 236 ㎥/s for the distance of the moving smoke which can limit the distance to 250m.