사법부에 거는 세가지 바램

정승원 한국사법행정학회 1987 사법행정 Vol.28 No.1

무진동 굴착구간에 대한 전자뇌관의 적용성 평가 사례

정승원,송진혁,황남순,김남수,정민성 대한화약발파공학회 2022 화약발파 Vol.40 No.4

당 현장 주변에 보안물건이 위치하고 있어, 기존 설계상에 176m 구간이 무진동 기계식 굴착공법으로 설계되었으나, 시공성 및 경제성 향상을 위하여 전자뇌관 미진동 발파공법을 제안하였다. 검토 결과, 발파소음, 진동 모두 허용기준 이내의 안전성을 확보하여 해당 구간에 대하여 전자뇌관 미진동 발파공법 적용 가능성을 확인하였다. 아울러 검토 구간에서 무진동 굴착공법과 전자뇌관 미진동 발파공법을 비교한 결과, 공사 기간을 88일단축하여 경제적으로 큰 이점이 있는 것으로 평가되었다.

법규에 따른 자원회수시설의 건축적 형태에 관한 연구 - 서울과 도쿄를 중심으로 -

정승원,이강준,Jung, Seung-won,Lee, Kang-jun 인천대학교 도시과학연구원 2022 도시과학 Vol.11 No.1

Waste to Energy Plant were recognized as hateful facilities, and there were many conflicts in the location due to social problems such as the NIMBY phenomenon due to problems such as damage to property in the surrounding area, odor, and image loss. Problems such as air pollution and odor are solved by the development of advanced prevention facilities such as electric dust collectors, wet cleaning systems, semi-dry reaction towers, bag filters, and catalyst towers (SCR: Selective Catalytic Reduction), and air recycling facilities in waste storage tanks. However, it is being avoided because of the perception that it is an incinerator. To resolve these conflicts, the government installs and operates resident convenience facilities to compensate residents near resource recovery facilities, provides green space and improves the environment, and supports heating expenses in accordance with the 「Waste Treatment Facility Support Act」. The purpose of this study is to derive implications through the analysis of domestic and overseas case studies for resident convenience facilities and environment improvement for the promotion of local communities in resource recovery facilities and use them as basic data for community promotion and environmental improvement when installing resource recovery facilities in the future.

Stearic Acid 가 배합고무와 황동이 피복된 강선코드의 접착에 미치는 영향

정승원,손봉영,전경수,강성일,서곤,박찬영 한국고분자학회 1996 한국고분자학회 학술대회 연구논문 초록집 Vol.1996 No.10

주행 시뮬레이터를 활용한 도심 지하도로 유입연결로 합류부 주행행태 분석

정승원,김수환,이동민,정근기 한국ITS학회 2022 한국ITS학회논문지 Vol.21 No.6

지하도로의 유입연결로 합류부는 지상도로와 달리 터널로 인하여 시계확보에 제약을 받는 다. 본 연구에서는 시계확보에 관련 설계요소가 합류부 주행에 미치는 영향을 분석하기 위하 여 주행 시뮬레이터를 활용한 가상주행실험을 수행하였다. 가상주행환경 구축시 시계확보 설 계요소를 시나리오에 반영하기 위하여 갈매기차로 길이와 본선차량 접근속도를 시나리오로 구분하여 운전자 주행행태를 분석하였다. 시나리오간 속도 측면의 분석지표와 차로변경지점, 운전자 주시 비율 분석결과는 일관성 있는 방향으로 도출되었고, 통계적 유의성을 검토하였다. 그 결과, 본선 접근속도가 더 높은 시나리오에서 갈매기차로 길이에 의한 특정 시나리오 사이 에 운전자 주행행태의 차이가 있는 것으로 나타났다. 이러한 결과를 바탕으로 지하도로 유입 연결로 합류부의 주행안전성 향상을 위한 설계방향과 시사점을 제시하였다. Unlike ground roads, the on-ramp merging section of underground roads cannot be seen by drivers of main road due to tunnels. In this study, a driving simulator was used for analysis, and virtual driving experiments were carried out to assess the driver’s visibility for different design factors. The driver's driving behavior was analyzed by setting scenarios considering the length of chevron markings and the approach speed from the main road. The results of the analysis were used to determine the design factors for ensuring visibility when constructing the virtual driving environment for each scenario. These factors, including speed, lane change points, and driver’s gaze ratios, were reviewed for significance using a statistical approach. As a result, in scenarios with a higher approach speed from the main road, it was discovered that there was a difference in driver’s behavior between specific scenarios depending on the length of the section with chevron markings. Based on these findings, this study suggests implications and feasible solutions to improve driver safety on the on-ramp merging section of underground roads.

On the viscous resistance of marine sediments for estimating their strength and flow characteristics

정승원,Sung-Sik Park 한국지질과학협의회 2016 Geosciences Journal Vol.20 No.2

To examine debris flow mobility with respect to the runout distance and velocity, strength parameters (e.g., the Bingham and Herschel-Bulkley yield stresses, undrained shear strength, flow behavior index) are needed. In modeling debris flow, the Bingham and Herschel-Bulkley yield stresses are often used, but they lead to large differences in the runout distance and velocity of the failed masses. It is very difficult to determine the true yield stress. In this study, we propose using the viscous resistance, obtained from the normalized flow curve resulting when the shear stress and shear rate are divided by reference shear stress and shear rate values (i.e., logτ/τ o-log / o). The viscous resistance and strength parameters are compared from the viewpoint of geotechnology and rheology. The shear strength and flow characteristics of marine sediments can be characterized in terms of the viscous resistance and the viscous resistance is linearly related to other strength parameters (e.g., viscosity, yield stress and undrained shear strength). Thus, the viscous resistance provides a simple and easy approach for approximating strength and flow parameters in debris flow dynamics.

굴착기간 단축을 위한 기계식 암굴착 구간에 대한 전자뇌관 적용 사례

정승원,송진혁,김영호,송영석,김정환,황남순,고정영 대한화약발파공학회 2023 화약발파 Vol.41 No.2

The cultural property is located near the site, and the vibration management is very strict to protect it. It is designed as a mechanical excavation method in consideration of the cultural property. However, the low-vibration blasting method using electronic detonators was proposed due to concerns about the decline of construct ability and economic feasibility of the mechanical excavation method. As a result of the test blasting, it was confirmed that blasting vibration was reduced by 55~88% compared to the allowable vibration value, and blasting noise was reduced by up to 17.2% compared to the allowable value. As a result of considering the damage range for the safety things and the cultural property nearby, the safety of the low-vibration blasting method was confirmed. Through this, the mechanical excavation method was changed to the low-vibration blasting method. 당 현장 인근에 문화재가 위치하고 이를 보호하기 위해 진동관리가 매우 엄격하게 이루어지고 있으며, 문 화재를 고려하여 기계식 굴착공법으로 설계되어 있다. 하지만 기계식 굴착공법의 시공성과 경제성 저하가 우려되 어 전자뇌관을 이용한 미진동 발파공법을 검토하게 되었다. 시험발파 결과, 발파진동은 허용 진동치 대비 55~88%, 발파소음은 허용치 대비 최대 17.2% 저감되는 것을 확인하였다. 인근의 보안물건과 문화재에 대한 영향 범위를 고려한 결과, 미진동 발파공법의 안전성을 확인하였다. 이를 통해 기계식 굴착공법을 미진동 발파공법으 로 설계변경을 실시하였다.

A Study on the Fine Structure of the Marine Diatoms of Korean Coastal Waters - Genus Thalassiosira 4

정승원,Seung Won Jung,Jin Hwan Lee 한국조류학회I 2009 ALGAE Vol.24 No.2

The marine phytoplankton diatom Thalassiosira species are described from the Korean coastal waters, based on observations of fine structure of its frustules. As a fourth series, this study deals with 5 Thalassiosira species (T. decipiens, T. eccentrica, T. mala, T. nodulolineata, and T. proschkinae). The most striking features of these species are also the form and position of two processes on frustules. There is a central strutted process on valve face except T. nodulolineata, which has a modified one on its center. The external tubes of marginal strutted processes are divided two forms: “pile” form in T. decipiens and T. proschkinae, “short straw” form in T. eccentrica and T. nodulolineata. T. mala does not present the external tubes in valve margin. The labiate processes are located in valve margin except T. proschkinae, which has it on valve face. Of these, three species (T. mala, T. nodulolineata at a final contentration of 5% and T. proschkinae) were newly recorded in the coastal waters of Korea.

구연 : 아이리스 ; 만성간염, 간경변 및 간세포암종에서 Cyclooxygenase-2 와 Vascular Endothelial Growth Factor의 발현 (초)

정승원,장재영,강은정,이세환,김상균,천영국,김영석,조영덕,김홍수,김부성,진소영 대한간학회 2010 Clinical and Molecular Hepatology(대한간학회지) Vol.16 No.3(S)

광산폐석의 유변학적 특성과 토석류 흐름특성 분석

정승원,Jeong, Sueng Won 대한토목학회 2014 대한토목학회논문집 Vol.34 No.4

휴 폐광산지역은 복합지질재해지역으로 집중호우에 의해 토사재해와 산성광산배수를 발생시킨다. 본 연구는 폐석적치장 전반에 걸쳐 토사재해가 관측된 임기광산에 대해 지반공학적 유변학적 시험을 수행하고 얻어진 시험결과를 토대로 1-D 토석류 수치해석을 수행함으로써 토석류의 확산성을 조사하였다. 모래와 자갈로 구성된 광산폐석 시료의 유변학적 특성을 조사하기 위해 베인관입형 레오미터(Vane-penetrated rheometer)를 사용하였으며, 전단응력 제어를 통한 전단응력(${\tau}$)-전단속도(${\dot{\gamma}}$)와 점도(${\eta}$)-전단속도(${\dot{\gamma}}$) 간의 상관관계를 얻었다. 또한 광산폐석 시료에 대해 잘 알려진 유변학적 모델들(Bingham, Herschel-Bulkley, Power-law, bilinear 및 Papanastasiou 모델)을 적용함으로써 수치해석에 필요한 유변학적 매개변수(항복응력과 소성점도)를 결정하였다. 실험결과에 따르면, 체적농도에 무관하게 전형적인 전단담화(shear thinning) 거동이 관측되었으며, 함수비가 증가할수록 Bingham 유체처럼 거동하는 것으로 나타났다. 또한 사용된 모든 유변학적 모델들은 파괴 후 거동에 적합한 모델들로 밝혀졌다. 토석류 흐름특성을 조사하기 위해 실험결과를 토대로 토석류 크기(5 m, 10 m 및 15 m)와 항복응력(100 Pa, 200 Pa, 300 Pa 및 500 Pa)을 선정하여 1-D BING을 통해 수치해석을 수행하였다. 그 결과, 토석류 이동거리와 이동속도는 항복응력의 크기에 반비례한 것으로 나타났으며, 토석류 항복응력이 500 Pa 이하인 경우 대부분의 토사는 계곡부까지 흘러갈 수 있는 것으로 나타났다. 따라서 집중호우 기간에 산악지역에 방치된 광산폐석은 토사재해에 취약하고 2차적으로 인근 수계로 유입되어 환경적 문제를 야기시킬 수 있는 것으로 나타났다. Abandoned mines often cause environmental problems, such as alteration of landscape, metal contamination, and landslides due to a heavy rainfall. Geotechnical and rheological tests were performed on waste materials corrected from Imgi waste rock dump, located in Busan Metropolitan City. Debris flow mobility was examined with the help of 1-D BING model which was often simulated in both subaerial and subaqueous environments. To determine flow curve, we used a vane-penetrated rheometer. The shear stress (${\tau}$)-shear rate (${\dot{\gamma}}$) and viscosity(${\eta}$)-shear rate (${\dot{\gamma}}$) relationships were plotted using a shear stress control mode. Well-known rheological models, such as Bingham, bilinear, Herschel-Bulkley, Power-law, and Papanastasiou concepts, were compared to the rheological data. From the test results, we found that the tested waste materials exhibited a typical shear shinning behavior in ${\tau}$-${\dot{\gamma}}$ and and ${\eta}$-${\dot{\gamma}}$ plots, but the Bingham behavior is often observed when the water contents increased. The test results show that experimental data are in good agreement with rheological models in the post-failure stage during shearing. Based on the rheological properties (i.e., Bingham yield stress and viscosity as a function of the volumetric concentration of sediment) of waste materials, initial flowing shape (5 m, 10 m, and 15 m) and yield stress (100 Pa, 200 Pa, 300 Pa, and 500 Pa) were input to simulate the debris flow motion. As a result, the runout distance and front velocity of debris flow are in inverse propositional to yield stress. In particular, when the yield stress is less than 500 Pa, most of failed masses can flow into the stream, resulting in a water contamination.