도시고속도로 접속 교차로 운영개선효과

김갑수,신판식 嶺南大學校 環境問題硏究所 1998 環境硏究 Vol.18 No.1

대부분의 대도시에서 있는 도시고속도로의 가장 중요한 기능은 이동성이다. 그러나, 대구광역시 도심에 위치한 신천고속화도로의 교통흐름은 주변 간선도로의 교통과 불완전 입체교차형태로 이루어져 있어, 그 처리 방식에 따라 병목현상을 초래하고 있다. 본 연구는 신천고속화도로와 접속되는 접속교차로의 운용방법을 각각의 대안으로 나누어 분석하였다. 대안 설정은 접속 교차로에서의 좌회전 현시 유무에 의해서 좌회전 없음 (대안 Ⅰ), 신천대로 상에 좌회전 (대안 Ⅱ), 대동로 상에 좌회전 (대안 Ⅲ)으로 나누었다. 분석은 각 대안별로 신천대로 Weaving 구간에서의 주행속도 변화, 인접교차로의 U-Turn 구간 V/C비 변화, 접속교차로의 평균정지지체시간 변화, 차량의 주행비용변화에 초점을 두고 실시하였다. 분석결과 대안 Ⅲ이 가장 좋은 효과가 있는 것으로 나타났다. The most important function of the urban expressway is a mobility in most cities. However, traffic flows of Sin-Chun Urban Expressway in Tae-gu is deeply affected by its intersection-type and traffic situation of crossing arterial roads. For instance, bottleneck in Sin-Chun Urban Expressway is affected by these two reasons. This study analyzed the effectiveness of the operational methods of intersection divided into three alternatives on the Sin-Chun Urban Expressway. The alternatives are made upon the existence of left-turn phase : left-turn prohibition by the existence and the non-existence of left-turn phase on cross street (Ⅰ), left-turn on Sin-Chun Dae-Ro (Ⅱ), and left-turn on Dae-Dong arterial road (Ⅲ), respectively. Each alternatives was analyzed according to the change of Running Speed in weaving area, the change of V/C ratio in U-Turn area, the change of Average Stopped-Time Delay in cross street and the change of vehicle operating cost. The results of the analyses showed that the third alternative was most efficient than the other alternatives.

일반화시간을 이용한 대중교통 서비스 평가에 관한 연구

김갑수,권대우 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.2

This paper suggested generalized time model and method for service evaluation of public transportation using it. Generalized time model was established using equivalent time coefficient and VOT. The results of this study are as follows: 1) In scoring of service, generally bus satisfactory degree is lower than subway's. In case of bus, satisfactory degree of access time is the biggest and travel time, wait time, fare in order. In case of subway, satisfactory degree of travel time is the biggest and fare, access time in order. 2) In order to know a burden of each travel mode, equivalent time coefficient was estimated as following. Single transfer 16.19, walk 2.61, wait 1.87, parking 1.75, subway 0.76, car 0.66. Therefore it is found that single transfer is 16 times than bus and subway and car are lower than bus. It was appeared that these have theoretical and practical propriety in view of each personal characteristics. But, it is need to consider parking and car equivalent time coefficient of under 19 age. 3) It was appeared that estimated value of time is reasonable and the result is 17.27(\/min). Generally there was a large deviation according to personal characteristics, specially driver licence and car being or not. 4) Evaluation of current service, desired service, satisfactory service and dissatisfactory service in case study district is done using generalized time model which was established using equivalent time coefficient and value of time. Availability of generalized time model would be shown to compare and evaluate service between different modes, bus routes or areas with different service, service after improvement and before improvement. Also in the future, generalized time may be used to establish another service evaluation model of public transportation. It is needed to study wait time for subway and to consider trip purpose in establishing equivalent time coefficient and value of time.

敎員硏修敎育의 效果分析

河甲洙 釜山敎育大學 1975 부산교육대학 논문집 Vol.11 No.2

It is the purpose of this study to have an analytical review of the effects of the in-service education for the primary and secondary school teachers. The effects are evaluated according to following six areas; 1) educational belief system, 2) curriculum, 3) educational methodology, 4) evaluation, 5) shool administration and 6) R & D. In an oversimplified way, I can answer my original research question by conculding that 1)about 30% of the respondents were highly helped to refresh or reconstruct their educational beliefsystem through the course, 2) about a quarter of respondents were helped to study the modern school curriculum, 3) about 13% of the respondents were effectively helped to develop their educational teachnology, 4) about 10% of them were effectively helped to study educatiooal mesurement and evaluation, 5) about 37% of the respondents were helped to have theories and skills for the school administration(most of them are school administrators) and 6) about 18% of them were effectively helped to study more about R & D. The importance of the in-service education is gradually being emphasized in every field of occupations. But as we saw above, the effcts of in-service program are far below the expected level. In a word, it suggests us to have more objective study and to reform the program of in-service education for the primary and secondary teachers. Following recommendations may be suggested; 1)all of the in-service education should be integrated into the program of the legal institution, 2) the program should be organized in relation with the problems of the current educational movement, 3) to have a rapid educational innovation, the in-service educauion for the school administrator may be preceded.

HI-STAR 교통량측정기(NC90-A)의 활용방안에 관한 연구

김갑수,김정수 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.2

Recently, HI-STAR traffic counter is used many to survey traffic volume instead of manual. But, This HI-STAR traffic counter was not verified in domestic situations. So, The purpose of this paper is to compare traffic volume by HI-STAR traffic counter(NC90-A model) with that of manual survey, and propose optimal utilization of HI-STAR traffic counter. Results of paired t-test of two groups(compare traffic volume by HI-STAR traffic counter with traffic volume by manual survey), any difference was not found. Generally, Traffic volume by HI-STAR counter was lower than that of manual survey, and this is very important problem. So, new model is needs which predict manual survey volume by HI-STAR traffic volume.

향류식 액-액 SPRAY탑의 혼합특성

도갑수 慶北工業專門大學 1978 論文集 Vol.15 No.-

In the spray type liquid-liquid extractor 5cm in diameter and 1m in height, the dispersion of i-propy1 alcohol into continuous potassium carbonate aqueous solution was studied by measuring the composition of dispersed phase every 10 minute according to diameter of orifice and flow rate of dispersed phase. As the result of this study, the optimum dispersion time is known to approach 20 minute at 0.2cm in orifice diameter of diameter of dispersed phase distributor and 1.5l/min in flow rate of dispersed phase.

고온·알칼리성 Bacillus sp.의 Catabolite Repression 저항성 변이주로부터 Cellulase 및 Xylanase의 생산

최수철,정영철,강갑석,심기환,성낙계 慶尙大學校 1990 論文集 Vol.29 No.2

고온·알칼리성 cellulase 및 hemicellulase 생성 미생물을 분리할 목적으로 pH 10.3의 PY-CMC배지에서 55℃로 3회 연속 직접배양하여 효소 생성능이 우수한 20여균주를 분리하였고, 그 중에서 2개균주를 최종 선정하여 균학적 성상을 조사한 결과 고온·알칼리성 Bacillus속과 거의 일치하였다. 선정, 동정된 고온·알칼리성 Bacillus sp. F204와 F1020은 α-1, 4-glucose 등에서는 효소 생합성이 왕성하였으나, glucose와 같은 단당류에서는 효소가 전혀 유도되지 않았는데, 이 두 균주는 carbon catabolote repression을 받고 있었다. 2-deoxy glucose는 야생주에서는 강력한 repressor로 작용하였고, 야생주의 catabolite repression을 해제 시키는데 antimetabolite로 작용한다는 것이 밝혀졌다. NTG(500㎍/㎖, 50℃, 20∼60분)와 UV(2분) 처리후 2-DG(20mM)에 직접배양하여 강력한 catabolite repression resistant strain인 M-211과 M-367을 분리하였다. M-211과 M-367은 2-DG를 energy원으로 이용하였으며, glucose에 대하여 CMCase는 1.5%, avicelase 및 xylanase는 약 1.0%까지 저항성을 보였다. 또한 두개의 변이주의 효소 활성은 CMCase 2배, avicelase 1.5배 및 xylanase3배의 증가를 보였으며, 각 효소생합성을 위한 gene expression은 cAMP-independent transcription을 하는 것으로 나타났다. Cellulase and xylanase synthesis of thermophilic alkalophilic Bacillus sp. F204 and F1020 isolated in our lab, were repressed by glucose and induced by compounds structurally related to α-1,4 linkage (avicel cellulose and xylan et. al.). Catabolite repression-resistant mutants were obtained through treatment of NTG(500㎍./㎖), UV(2 min) and enrichment culture in 2-deoxy glucose (20 mM) containing PY-glucose on the wild type strain. T재 catabolite repression resistant mutants were not repressed by glucose and produced cellulase complex and xylansase when in grown in the presence of 1.0% glucose and 30mM 2-DC, which were repressors in wild type. Enzyme production was greater with the mutants (CMCase of 2 times, avicelase of 1.5 times, xylanase of 3 times) than with the wild type strains under various test conditions. T재 mutants M-211 and M-367 were potential catabolite repression resistant mutants and their gene expression was cAMP independent transcription.

TiO₂ 현탁액에 의한 Brilliant Blue FCF의 광촉매 분해

정갑섭,최수일 한국환경과학회 2004 한국환경과학회지 Vol.13 No.6

In a batch reactor, the characteristics of photocatalytic degradation of brilliant blue FCF in titanium dioxide suspension was studied under the irradiation of ultra-violet ray. Photocatalytic degradation in anatase type of TiO₂ was more effective than in rutile type of TiO₂ below the dosage of 5g. The degradation rate was slightly increased with decreasing initial pH of brilliant blue FCF aqueous solution, but rapidly increased with the addition of oxidant. Potassium bromate acted as more effective oxidant than ammonium persulfate. The photocatalytic degradation rate of brilliant blue FCF was pseudo-first order with rate constants of 0.012, 0.006 and 0.003min^(-1) at initial pH 3.1, 5.2 and 7.1 of brilliant blue FCF solution, respectively.

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.

住宅의 保溫設計에 關한 硏究 : 열관류저항과 보온의 지역성을 中心으로 Especially is heat transmission resistance and the locality of heat conservation

李昌甲,尹錫天,鄭秀永,李基男 충남대학교 공업교육연구소 1980 論文集 Vol.3 No.2

Under the current energy crisis over the world, energy conservation should be urgently sough in every related aspect and hence the heat conservation design of dwelling house is accordingly a prevailing task to architects and engineers. This study deals mainly with the design concept on the architectural point of view and prepares a guide for the design of the distribution of solar radiation in the peninsula. The major findings are as follows: 1) In measuring the heat transmission and in its calculation, the thermal conductivity should be applied taking into account to the regional variation and in general 5-8 Kcal/m²h ℃ and 20-30 Kcal/m²h ℃ are recommended as the heat transfer coefficient, for inner and outer surface respectively for the practical purpose. Details for design are shown in a figure and a table. 2) Taking into consideration the locality at 24 regions, D^16.5-10.5 Degree day shows variation ranging from 1,048 to 2,666. 3) Economic justification of heat conservation works should be analyze in relation with Degree day. 4) Calculation with field survery date demonstrates that outdoor temperature for heating design ranges from -4℃ to -15℃ below the freezing point over the nation except Cheju-Island. 5) The use of heat insulation materials is strongly recommended in material design for house energy saving and the standard of K-value applied to new house should be prepared.

市幹線街路 交叉路에서의 交通遲滯分析에 關한 硏究 : 工事에 따른 遲滯度 比較

金甲洙,申判湜,金國煐 嶺南大學校 工業技術硏究所 1998 工業技術硏究所論文集 Vol.26 No.1

This study describes a way to evaluate effects of delay caused by constructions of various kinds, illegal parking especially occupies one lane among three lanes. The part of intersections delay ratio in urban arterial streets was analyzed by classification which was divided by road-occupation and normal state. The result of this study can be summarized as follows ; ●It was confirmed that Average Approach Delay per vehicle caused by the length of 53m occupancy of the 3rd lane which was bound for SB in Jnag-Won intersection increase 131.7, 217.7, 113.5seconds respectively in EB, SB, NB bounds. ●Level of Service in survey area Went down to level F from level E. Average Approach Speed has decreased by 16.1㎞/h, 22.8㎞/h, 15.3㎞/h respectively in EB, SB, NB bounds.