민간공원특례사업에 있어 갈등요인 분석과 해소방안 연구

이정하(Lee Jung Ha),박태원(Park Tae Won) 도시정책학회 2018 도시정책학회 학술대회 Vol.2018 No.1

Since the Constitutional Court ruled in July 1999 that the private urban planning facilities were subject to the violation of private property rights, the government has adopted a sunset system for urban parks. While the private business owner s size of urban parks was lowered from 80 % to 70 % in 2014, the cause of the controversy over the project was changed from 100,000㎡ or more in total urban parks to 50,000㎡ or more. Therefore, this study analyzes the causes of failure in the public park formation projects based on the cases in which conflicts are emerging in analyzing similar systems abroad and promoting projects, and analyzes the causes of failure through related experts and surveys. In addition, the causes of conflicts are different, local sentiments and development conditions are different, and the limit of urban park management and response plans for future urban urban planning based on projects focused on the business feasibility and retrofittibility are limited, and urban park plans are less than 50,000㎡.

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.

실험계획법을 이용한 현가장치의 요소설계

박태원,김상중,박찬종(T.W.Park),S.J.Kim,C.J.Park 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

Using of computers in design is a trend in recent years. A good suspension model is depend on the carefully prepared data like joint connection points or spring stiffness, etc.<br/> Once a good computer model is obtained, a parametric study for specific suspension design factor, like a toe angle, can be done to obtain sensitivity information. Using this information, several important design parameters for a specific design factor can be identified. Once a design of experiments is done using computer models, the results can be used to approximate a function which can best represent the experimentation. An optimum solution of this function can be used to fined an optimum design of a suspension system for a specific suspension design factor. Same method is again applied to other design factors iteratively until a good suspension system design is obtained.<br/>

Cu를 함유한 HSLA-100강 용접 열영향부의 미세 조직 및 인성

박태원,심인옥,김영우,강정충 ( T . W . Park,I . O . Shim,Y . W . Kim,C . Y . Kang ) 한국열처리공학회 1995 열처리공학회지 Vol.8 No.1

A study was made to characterize the microstructures and mechanical properties of the base metal and the heat-affected zone(HAZ) in Cu-bearing HSLA-100 steel. The Gleeble thermal/mechanical simulator was used to simulated the weld HAZ. The relationship between microstructure and toughness of HAZ was studied by impact test, O.M, SEM, TEM, and DSC. The toughness requirement of military specification value was met in a.ll test temperatures for the base metal. The decrease of HAZ toughness comparing to base plate is ascribed to the coarsed-grain and the formation of bainite. Obliquely sectioned Charily specimens show that secondary crack propagate easily along bainite lath. Improved toughness(240J) at HAZ of Tp₂=950℃ is due to the fine grain, and reasonable toughness(160∼200J) in the intercritical reheated HZA is achieved by the addition of small amount of carbon which affects the formation of M-A. Cu precipitated during ageing for increasing the strength of base metal is dissolved during single thermal cycle to 1,350℃ and is precipitated little on cooling and heating during subsequent weld thermal cycle. Thus, the decrease of toughness does not occur owing to the precipitation of Cu.

Cu를 함유한 저합금 고장력강의 미세 조직에 미치는 열처리의 영향

박태원,심인옥,김영우,강정충 ( T . W . Park,I . O . Shim,Y . W . Kim,C . Y . Kang ) 한국열처리공학회 1995 열처리공학회지 Vol.8 No.2

A study was made to examine the effects of heat-treatment on the microstructures of Cu-bearing HSLA steels. The details of microstructures were studied by using optical microscopy(OM), transmission electron microscopy(TEM) and hardness test. The as-rolled microstructure of HSLA-A consists of ferrite(α) whereas that of HSLA-B consists of needle-shaped phase. The difference in microstructure can be ascribed to the different amount of Ni, Mn, Mo, Cu which affect the hardenability. The sustenite grain size is very small up to 1000℃ owing to the Nb-precipitates. As the austenitizing temperature increases above 1000℃, the austenite grain grows rapidly. There are two hardness peaks in the hardness versus temperature curve, at 500℃ and at 675℃(HSLA-A), 725℃(HSLA-B). The peak at 500℃ result from the formation of Cu-precipitates and second hardness peak is created due to the formation of M-A constituents. The hardness decrease in HSLA-B steel with ageing temperature is small because of the higher amounts of Cu than HSLA-A steel. The fine, round ε-Cu precipitates grow with ageing temperature and finally transform into rod shape.

열분석법에 의한 Al-2,1Li-2.9Cu합금의 석출현상에 미치는 In 첨가의 영향

박태원,송영범,이용윤 ( Tae Won Park,young Beum Song,Yong Yun Lee ) 한국열처리공학회 1997 열처리공학회지 Vol.10 No.4

A study was conducted to examine the effects of In addition on the precipitation behaviors of Al-2.1Li-2.9Cu alloy by differential scanning calorimetry, transmission electron microscopy and microhardness tester. DSC analysis was measured over the temperature range of 25∼50℃ at a heating rate of 2∼20℃/min. The heat evolution peaks due to the formation of GP zone and δ` phase shift to higher temperature and the peaks to T₁and θ` phases shift to lower temperature by In addition. From this result, it was proved that the formation of GP zone and δ` phase is suppresed whereas that of T₁and θ` phases are accelerated by the In addition of 0.15wt%. The age hardening curve aged at 190℃ showed that the In bearing alloy(alloy B) has more faster age hardening response and a higher peak hardness than In-free alloy(alloy A), attributed to the fine and homogeneous distribution of T₁and θ` phases. The activation energies for the formation of δ`phase in In-free and In-bearing alloys are 22.3㎉/㏖ and 18.6㎉/㏖, respectively. Those for T₁(+θ`) phase of In-free and In-bearing alloys are 24.3 and 37.5㎉/㏖, respectively. Quenched-in excess vacancies play an important role to the formation of precipitates.

21세기의 기술개발

박태원,Park, Tae-Won 한국과학기술단체총연합회 1993 과학과 기술 Vol.26 No.4

용접구조물의 수중 폭파변형시험 개요

박태원,송영범,김홍규,홍성석,심인옥,Park, Tae-Won,Song, Young-Beum,Kim, Hong-Kyu,Hong, Sung-Suk,Shim, In-Ok 대한용접접합학회 2010 대한용접·접합학회지 Vol.28 No.1

건강근로자효과 보정 전후의 메타 분석 결과 비교 -직업적 트리클로로에틸렌 노출과 암의 연관성-

박태원,황성호,이경무,Park, Tae Won,Hwang, Sung Ho,Lee, Kyoung-Mu 한국환경보건학회 2014 한국환경보건학회지 Vol.40 No.5

Objectives: By conducting a meta-analysis of cohort studies reporting standardized mortality ratios (SMRs) for workers exposed to trichloroethylene, we attempted to adjust for healthy hired effect by applying the same methods as described in a recent report from the Agricultural Health Study. Methods: Among all cohort studies that evaluated the association between all cancer, non-Hodgkin's lymphoma (NHL), kidney cancer, liver cancer and occupational exposure to trichloroethylene, a total of 10 studies reporting SMR values were selected. A random-effects model was used to estimate the summary SMRs or rSMRs and 95% confidence intervals. Relative SMR ($rSMR=SMR_x/SMR_{not\;x}$) was calculated comparing observed and expected counts for all cancer, NHL, kidney cancer, and liver cancer with an independent referent set of values consisting of the observed and expected counts for other causes. Results: The SMR values for all causes ranged from 0.68 to 1.03, suggesting moderate to weak healthy worker effect for the selected studies. When the healthy worker hire effect was taken into account, the summarized risk became statistically significant; the summary SMR of all cancer was 0.95 (0.91-1.00) and the summary rSMR of all cancer was 1.10 (1.04-1.15). The summary SMR of NHL was 1.04 (0.93-1.14) and the summary rSMR of NHL was 1.23 (1.04-1.46). The summary SMR of kidney cancer was 1.08 (0.88-1.33) and the summary rSMR of kidney cancer was 1.23 (1.02-1.49). The summary SMR of liver cancer was 0.88 (0.78-0.99), and the summary rSMR of liver cancer was 0.95 (0.84-1.07). Conclusion: The rSMR method is useful to determine summary risk adjusted for healthy worker effect through meta-analysis.

임상증상에 따른 악관절이상의 방사선학적 소견에 대한 비교연구

박태원,유동수,Park Tae-Won,You Dong-soo 대한영상치의학회 1989 Imaging Science in Dentistry Vol.19 No.1

The authors analyzed the clinical findings, radiological findings and their correlations in the temporomandibular joint disorders. The results were as follows: 1. The most prevalent age group was in the first decade, then the second decade and the third decade. Female were more common with a ratio of 3.4:1. 2. The most common clinical findings was the pain on open mouth position (42.3%), then came the clicking and limitation of mouth opening. 3. The most common bone change on the condyle side was the erosion, then came the flattening, the osteopyte and the sclerosis in that orders. 4. In the case of the crepitus, the coarse crepitus showed more radiological change than the fine crepitus. The 27% of the patients with crepitus showed the bone change and the patients with crepitus showed more bone change than any other clinical symptoms. 5. In the case of the mouth opening limitation, the evaluation of the translatory movement by transcranial projection was in accordance with the clinical evaluation. 6. The correlation between the clinical symptom and the condylar position within the mandibular fossa was not present and in the case of diagnosis of disc displacement, the transcranial projection seemed not to be able to substitute for the arthrography. Radiographically, the most prevalent age group which showed the bone change was in the first, the second and the third decade. And the bone change seemed to have no relationship with aging.