과속방지턱과 차량통과속도의 관계에 관한 연구

김갑수,김정수 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.1

Recently, the study of community-zone traffic planning is lively progressing for efficient use of vehicle and protects residental environment from vehicle traffic. In community-zone, speed hump is mainly used to control travel speed and to keep road safety. The purpose of this study is to show the relation between various type of speed hump and passing speed of vehicles. The main results are as follows; ·After construction of round-top hump the passing speed of vehicle is uniform after 5days and the effect of speed reduction of Image hump is little. ·Multiple regression analysis of dummy variables is used to understand the relation between specification and other road condition of speed hump and passing speed of vehicles. In the result of analysis its R-square is 0.5786. From the result of analysis, most effective factors are height, width and color condition of speed hump. ·Speed reduction rate of flat-top hump in daytime(nighttime) is 0.23(0.23) and round-top hump is 0.49(0.33). Although the speed reduction rate of flat-top hump is lower than round-top hump, flat-top hump is effective in speed control.

통행시간절약가치 추정을 위한 QR 모형에 관한 연구 : 자가 운전자의 선호의식을 고려하여

김갑수,권대우 영남대학교 환경문제연구소 2000 環境硏究 Vol.20 No.1

통행시간절약가치는 교통계획, 교통정책 및 교통투자사업의 사업타당성 검토시 필수요소이다. 시간절약이란 것이 실제 거래되지 않는 것이므로, 행동데이타와 의식데이타를 이용하여 시간의 행동가치를 측정하기 위한 간접적인 다양한 계측방법이 사용되어 왔다. 그러나 대개 실용적 이유로 비집계 로짓형 모형을 많이 사용하여 왔으나, 선택지들이 상호 독립적이라는 모형의 가정은 종종 한정적인 경우가 많다. 본 연구는 실험적인 연구로서, 자가용승용차 이용자의 유료도로 동행에 대한 선호의식을 이용하여, 그들의 통행시간절약가치를 추정하기 위해 로짓모형을 포함한 3가지 QR 모형을 구축하였으며, 그 결과물을 이용하여 최적 모형을 구하기 위해 모형간을 비교 분석 하였다. 분석 결과 세 모형 모두가 양호한 적합도를 보였으며, 통행시간절약가치는 약 2,400원/시간/대로 나타났다. 또한 통행단축시간보다 통행요금에 대한 탄력성이 큰 것으로 나타났다. 모형간의 비교분석결과는 적중률을 제외한 잔차제곱합, 추정확출잔차제곱합, 로그우도함수 값 등에 있어서 로짓 모형이 다소 우위를 차지하는 것으로 나타났으나, 전체적으로 차이가 있다고 보기는 어려운 것으로 나타났다. The purpose of this study is to establish three QR (Qualitative Response) models for evaluating vague of travel time saving and to find out best model by comparing these models using outcomes of model formulation. The results of this study is as follows. First, value of travel time saving is about 2,400 won/hour in all three models. Second, the three models show that the goodness-of-fit is satisfactory. Third, the results of comparing models show that logit model is best in SSR (Sum of Squared Residuals), SSR weighted by estimated probabilities and value of log likelihood function without hit ratio, but the difference between each models is very small.

居住者優先駐車制의 選擇模型에 關한 硏究

김갑수,전종훈 嶺南大學校 工業技術硏究所 2004 工業技術硏究所論文集 Vol.32 No.1

The purpose of this study is to establish choice model for Residential Parking Permit Program(RPPP) and to analyze influence factors on RPPP, which was based on choice model established. Survey was separated into RPPP area and non-RPPP area and stated preference(SP) survey was conducted for each area The analysis results from study are as follows: 1) In the case of RPPP area, reason of agreement are stable parking space security, dissolution of complication of neighborhoods and reduction of an illegal parking vehicle. also, in case of non-RPPP area reason of agreement are stable parking space security, reduction of parking time, parking space prohibition of external vehicle. On the other hand, in case of RPPP area reason of opposite are inconvenience by parking of other vehicle, shortage of countermeasures about a vistor vehicle, difficulty of parking space assignment 2) In the case of RPPP area, influence factors on RPPP appeared parking distance, parking time1(all day), parking time2(day or night), parking fare, age and road width. On the other hand, in case of non-RPPP area it appeared with parking time1(all day), parking time2(day or night), degree of illegal parking controll, parking fare, frequency of vehicle use and road width.

첨단대중교통시스템을 위한 장ㆍ단기적 운영방안에 관한 연구 : - 대구광역시 시내버스를 중심으로 -

김갑수 嶺南大學校 工業技術硏究所 2001 工業技術硏究所論文集 Vol.29 No.2

The purpose of this study is to propose short-term service improvement strategies based on problems of operation system and long-term improvement strategies based on problem of service of urban bus in Daegu. The results are as follows; (1) Long-term service improvement strategies proposed are introduction of route pool to each urban bus zone already designed and bus information systems(BIS), restructuring of bus companies, bus route adjustment gradually and expansion of bus lane. (2) Short-term service improvement strategies proposed are drivers' and operators' voluntary effort for service improvement, introduction of service evaluation, considerations for on-time performance and efficiency, improvement of bus route guidance system, improvement of bus service for the handicapped and the aged people. These strategies described above would increase bus share, which would a base for resolving urban transportation problem, furthermore would provide best circumstance for effective and efficient application of advanced public transportation system introduced in the near future.

내연기관의 피스톤에 대한 온도분포 해석 및 측정

유갑종,강창수,이충원,엄용균 경북대학교 산업기술연구소 1989 産業技術硏究誌 Vol.17 No.-

In the recent development of internal combustion engine, considerable increase in speed and power has been accomplished. This achievement, however, brought up various problems due to the excessive piston temperature which becomes a crucial factor in engine durability. In this research, temperature distribution in a piston was investigated experimentally and theoretically with varied operation speed in unloaded condition. The method of temperature measuring is L-link system. The theoretical study was carried out by using the finite-element method. A three-dimensional model which simulates a half of piston has been utilized and the surface temperature measured by L-link. System has been used for the theoretical boundary conditions. The results obtained form the analysis of a piston of four-cycle gasoline engine are as follows; The piston temperature increases directly propotional to the engine speed on the thrust plane of piston crown, the temperature in the region closer to inlet valve is found to be higher than that closer to the exhaust valve, and the heating effect by exhaustion and the cooling effect by suction are shown on the iso-thermal line of crown surface. As the thickness of the crown section increased, the degree of symmetry of iso-thermal line about the center-line also increases. The internal and external temperatures of skirt are almost identical, and the temperature decreases away from fro pin-bos. In the case of pin-bos, the temperature of internal is higher than that of external at the lower part, and the temperature decreases along to the pin-perimeter.

쌀 調理過程 中 麥飯石의 Cd除去 能力에 關한 硏究

陳甲德,裵基哲,李正秀,金英姬 嶺南大學校 環境問題硏究所 1989 環境硏究 Vol.9 No.1

It was investigated Cadmium eliminating capacty of Quartz Porphyry(Q.P.) during washing, swelling, and cooking process in rice contaminated artificially. 1. After washing the rice four times with water, the eliminating rate of Cadmium from artificially contaminated sample were 16% in control group, 28% and 42% in 25g/kg and 50g/kg Q.P. treated group, respectively. 2. Swelling of rice in water about 20 minutes didn't change the Cadmium level in Q.P. treated group. 3. Cadmium eliminating efficiency by cooking was significantly increased in Q.P. treated group (43~54%) compared to control group(31%). 4. These results suggest that treatment of rice with Q.P. is very effective to remove the Cadmium contamination in rice.

Acrylonitrile제조 부산물에서 Acetonitrile의 회수(II)

都甲守 慶北工業專門大學 1977 論文集 Vol.14 No.-

In order to recover acetonitrile from byproduct obtained in manufacturing acrylonitrile, the sample colleted directly from the factory was treated respectively with extracting salt such as sodium chloride, potassium carbonate in batch and semi-continuous extraction subsequent rectification process. In batch type extraction process, the composition of upper layer was about 91wt% acetonitrile and the recovery yield about 70%, and in semi-continuous extraction subsequent rectification process, the bottom product having composition of about 99wt% acetonitrile was obtained.

信號交叉點에서의 交通騷音의 推定에 關한 硏究

金甲洙 嶺南大學校 工業技術硏究所 1990 연구보고 Vol.18 No.1

Factors which influence a road traffic noise at a signalized intersection are classified roughly into three factors, that is a traffic structure-traffic volume, mixture of heavy truck etc.,-road condition-a single lane road, a multilane road, kinds of pavements etc., and surroundings of a road. In this paper, the writer pay attention to the traffic structure first of all, because this factor is thought to be the most important. The traffic structure is still divided into many precise factors. So the traffic noise is analysed by the method of factor analyis based on the quantification theory to investigate a contribution of these factors to the traffic noise quantitatively.

大都市 都心部의 交通混雜에 따른 混雜費用의 適用方案에 관한 基礎的 硏究

金甲洙,李光鎬 嶺南大學校 環境問題硏究所 1998 環境硏究 Vol.17 No.2

요약문 대도시 지역은 교통시절에 대한 수급불균형으로 인하여 심각한 도시교통문제가 발생하고 있으며, 특히 교통혼잡으로 인한 경제적·사회적 손실이 심화되고 있는 실정이다. 따라서, 본 연구에서는 TDM 기법 중 자가용이용을 억제시키기 위한 도심진입부과금에 대하여 CBD로 유입하는 자가용승용차 중 백화점을 이용하는 운전자를 대상으로, 설문조사를 통한 교통혼잡비용에 따른 운전자들의 행동과 의식에 대한 특성을 파악하고, 또한 운전자가 느끼는 자가용 이용의 포기한계에 대한 걱정 도심진입부과금을 책정하고, 포기한계에 따른 대체교통수단 선택의 특성들을 경제이론을 적용하여 분석하였다. 그 결과는 첫째, 교통수요 억제 측면에 있어서의 TDM 효과는 2천원과 4천원을 혼잡요금으로 부과했을 때가 많은 수요를 억제시켜 가장 적절한 것으로 나타났으며, 둘째, 전환율 측면에서의 TDM 파급효과는 대표적인 대중교통수단인 버스와 지하철로의 전환이 가장 많이 이루어지는 것으로 분석되었으며, 셋째, 한 교통수단만을 고려하여 그 교통수단의 전환율을 높이기 위한 혼잡요금의 인상에 따른 고정된 교통수단의 전환율을 높이기 위한 혼잡요금의 인상에 따른 고정된 교통수단의 전환율 변화를 살펴보았다. Abstract This study analyzed on characterisics of driver′s behavior and consciousness by questionnaire which intended for driver of a passenger car using for private in CBD (Central Bussiness District), on charging for urban area influx which have being researched recent actively, as one of TDM (Transportation Demand Management). It was also appropriated a charge for urban area influx to consciousness of by themselves, to a limit which abandon a passenger car using for private at a certain measure of the charge. The major results of this study can be summarized as follows : On the side of traffic demand restraint, the effect of TDM was appropriated by restraining 20∼30 percentages or more than 40 percentages on a passenger car using for private when congestion pricings was 2,000 won or 4000 won In the case of diversion rate, it was found that a derivative effect of TDM was appeared highly in diversion to bus and subway as represetative of public transportation. In considering only one traffic modes (suppose others are fixed), to increase diversion rate of the traffic modes, change of fixed traffic modes which caused by raising of congestion pricings was analyzed. The result of that case study can ve summarized as follows : At first, It was shown that two traffic modes represent by substitutional relation on considering only bus traffic modes. Secondly, It was shown that two traffic modes represent by supplementary relation. on considering only subway traffic modes

認知樣式과 適應과의 關係에 관한 一硏究

河甲洙 釜山敎育大學 學生指導硏究所 1972 學生指導硏究 Vol.1 No.-