전문대학(專門大學) 농업토목과(農業土木科) 교육과정(敎育課程) 개선(改善)에 관(關)한 연구(硏究)

유범식 ( Beom Sik Yoo ) 한국농공학회 1983 韓國農工學會誌 : 전원과 자원 Vol.25 No.4

This study was intended to develop a curriculum for the agricultural engineering technology, and that on confidence with junior college characteristics. In order to per- formance with this study, job cluster was analyzed on 28 parts in respect to the agricultural engineering field and questionnaire was investigated to the field including in alumni 181, students 537, professional workers 174 and professors 54. The results from the above analysis and investigation can be summarized as follows. 1. According to the investigation on degree of important subjects from the questionnaire, it is presented at mathematics 43%, physics 36% in students and 32%, 12% in professional workers. Considering from this results, it is desirable that primary subjects should be forced. 2. In comparing with fundamental major subjects and applied it, it is presented at that 41%, this 34%, in the total investigations. It can be found that in the degree of requirement, this is lower than that among the major subjects. 3. In investigation to the degree of requirement in the experiment and practice, it is presented at surveying 63%. Soil mechanics 14%, materials 13%, hydraulics 9% in order, in total inspection. 4. From investigation to the degree of requirement on the subjects of established newly, it is presented at majoring and living English 64%, E.D.P.S 30%, in the total questionnaire. Judging from the results, it seems that the foreign language is necessary to technician more and more, for advance to abroad. Also, it is no wonder that make good use of the E.D.P.S. 5 The table 5 is represented the model curriculum from the above results in anaized data on the questionnaire and the job cluster of table 2.

불포화(不飽和) 점성토(粘性土)의 전단강도(剪斷强度) 특성(特性)에 관(關)한 연구(硏究)

유범식 ( Beom Sik Yoo ),도덕현 ( Duk Hyun Do ) 한국농공학회 1981 韓國農工學會誌 : 전원과 자원 Vol.23 No.3

In order to investigate the characteristics of the shear strength of the unsaturated cohesive soils which has mean characters of sand and clay widely used for banking, I selected soil samples from An-sung district and, against it, performed direct shear test and unconfined compression test changing grain size, compaction energy and moisture content and also performed triaxial compression test under optimum moisture content. The results are as follows; 1. As the passing percent of the No. 200 sieve increased from 23.6% to 56.1%, cohesion increased from 0.202kg/㎠ to 0.398kg/㎠ under the direct shear test and from 0.38 kg/㎠ to 1.05kg/㎠ under the tria4al compression test, internal friction angle decreased from 44. 78° to 34.34° under the direct shear test and from 31.88° to 13.31° under the triaxial compression test. 2. Cohesion showed it's maximum value around OMC and internal friction angle showed a tendency to increase according to the decrease of water content but it's increasing ratio was relatively slow. 3. Decreasing ratio of cohesion and internal friction angle was relatively sensitive according to the decrease of compaction energy. 4. The smaller of the vertical stress and the coarser of the grain size of samples, changing of the volume showed a tendency to increase and as the increase of water content, the shear displacement (d_h) at failure shear stress (τ_f) showed maximum and the τ_f-d_h curve was gentle. 5. To synthesize the results of the direct shear test and the triaxial compression test, cohesion showed higher under the triaxial compression test and internal friction angle showed a tendeney to appear higher under the direct shear test. It seems that we can get correspondent results by removing the side friction of mold with soils and adjusting the vertical stress and shearing speed under the direct shear test.

충청남도 농림수산 관련산업의 농림수산관련 부가가치 추계

김창환 ( Chang Hwan Kim ),유범식 ( Beom Sik Yoo ),이종상 ( Jong Sang Lee ) 한국농촌지도학회 2013 농촌지도와 개발 Vol.20 No.2

이 연구의 목적은 산업연관표의 생산자가격평가표, 국내거래표, 도소매마진표, 화물운임표 등을 이용하여 충청남도의 농업생산부문 및 전?후방 농업관련산업의 농업관련 부가가치를 추계하는 방법을 제시하고, 2005년의 산업연관표를 이용하여 충청남도의 농업생산부문 및 농업관련산업의 농업관련 부가가치를 지역별, 산업별로 추계하는데 있다. 이 논문의 제언으로 충남지역에 취약한 의료보건 분야의 공공 복리시설, 수산물 위판장과 수산물 가공공장, 의약품, 화장품, 사료, 엽연초 가공공장, 도소매에 관련된 유통구조 혁신이 매우 취약하여 총체적이며 전 방위적인 정책적인 배려와 농림수산업의 성장과 경쟁력을 제고시키는 종합적이고도 전사적인 차원의 정책입안을 제언한다. This study aims to suggest methods to estimate the agriculture related added value created in the agricultural production sector and the up/downstream agribusiness of Chungcheongnam-do by using the transaction table at producer`s price, the domestic transaction table, the wholesale-retail profit table and the freight charge table in the input-output tables, and further aims to estimate regional and industrial agriculture related added values created in the agricultural production sector and the agribusiness of Chungcheongnam-do by using the input-output tables of the year 2005. This thesis suggests the consideration of overall and holistic policy regarding public welfare facilities in healthcare, commission sale market places for fishery products, fishery processing factories, processing factories for medicines, cosmetics, feedstuff, and tobacco leaves and the innovative distribution system with regard to wholesale/retail that Chungnam lacks in. It is also proposed to make comprehensive and cohesive policy to enhance growth and competitiveness of agricultural, forestry and fishery industry.

Post-2020의 MRV 체계 수립을 위한 우리나라 대응 방향

김승도 ( Seung Do Kim ),유승연 ( Seung Yun Ryu ),정재혁 ( Jae Hyuk Jung ),유범식 ( Beom Sik Yoo ) 한국환경정책평가연구원 2015 환경정책연구 Vol.14 No.4

Post-2020 합의를 위해 주요 이슈로 부상하는 MRV(Measurement, Reporting, Verification)에 대한 국제적 상황을 분석하고, 선제적·효과적으로 대응할 수 있는 우리나라 전략을 수립·제시하는 것이 필요한 시점이다. 이에, MRV 체계 대안으로서 1) 이원화(Dual) MRV, 2) 통합(Unified) MRV를 분석 검토하였다. 분석 결과, 국가별 상황 및 능력에 따라 차별화하여 유연성을 부여하는 통합 MRV 체계가 가장 합리적이고, 실현 가능한 대안으로 판단되었다. 통합 MRV 체계 수립을 위해서 첫째, 우리 정부 내부적으로 통합 MRV 체계에 대한 합의, 둘째, 통합 MRV의 수립형태 및 적용 방안에 대해 예측 가능토록 방법과 내용의 구체화, 셋째, 개도국이 납득할 수 있도록 MRV 수준의 다양성 보장 방안에 대한 청사진(유연성에 대한 구체적 계획) 제시, 넷째, 개도국의 MRV 수준 제고를 위해 역량 배양을 위한 구체적 지원 방안 제시, 다섯째, 통합 MRV 도입을 위한 로드맵 개발·제시가 필요하다. 이를 추진하는 과정에서 우리나라는 선진국과 개도국 간 합리적 조정자로서 신기후체제가 합의에 도달하는 데 주도적 역할을 담당해야 한다. This paper attempts to determine the most reasonable and agreeable option for new MRV framework in Post-2020 Climate Regime as well as to develop South Korea strategies to reflect our national circumstances and capacities appropriately. The options for MRV framework considered here are 1) Dual MRV and 2) Unified MRV. We reached the conclusion that the Unified MRV framework may be the most reasonable option in the 2015 agreement in line with the objectives of MRV. To this end, it is essential to develop effective stepwise strategies consisted of: 1) reaching a consensus internally on the Unified MRV framework, 2) developing detailed procedures and methodologies to make the major elements of the Unified MRV framework understandable and predictable, 3) delivering an overview and blueprint to make sure of the flexibility of the Unified MRV framework to reflect the Parties’ capacities and national circumstances, 4) ensuring the financial and technical support schemes for developing countries to improve the capacity-buildings of MRV, and 5) developing a realistic road map to successfully implement the Unified MRV scheme within the required time frame. Korea, as a rational mediator between developed and developing countries, should play a leading role in reaching post-2020 agreement.

粘性土의 一次元壓密에 관한 實驗的 硏究

劉範植,趙成敏 안성산업대학교 1993 論文集 Vol.25 No.-

Many scholars studied about the consolidation character of clay through oedometer test to find out the various phenomena. These studies can be explained by Terzaghi's consolidation theory, the effective stress theory studied by Gibson and Mikasa, Hansbo's theory about critical hydraulic gradient and Mitchell's clogging phenomenon. These researches could not explain the consolidation behavior adequately because of the unskilled manufaturing techniques of test apparatus. So the research of one-dimensional consolidation using adequate consolidometer is needed to get the more precise results. This paper analyzes the one-dimensional consolidation behavior through the loading, unloading and reloading using the oedometer test and triaxial compression consolidometer Generally, it is hard to get the precise stress path and the consolidation behavior of the each part of the specimen by odeometer because of the effect of side friction and unsaturation. To reduce these problems, the specimen is saturated by the increase of the back pressure during the unloading. Using this specimen, the test of normal consolidation and overconsolidation is analyzed. The results strongly support the principle of effective stress. Under the normal consolidation, the coefficient of compression Cc is constant regardless of the loading stages, but the 24-hour compression curve is nonlinear under the overconsolidation. therefore, the constitutive equation under the normal consolidation can not be applied to that under the overconsolidation.

세립분 함유율에 따른 투수특성에 관한 실험적 연구

유범식,조성민 안성산업대학교 1995 論文集 Vol.27 No.-

Permeability characteristics are varied with fine grained soil contents, because soil is composed of various grain size. A series of permeability test is performed with the specimens obtained by standard compaction test, and soil samples are obtained by mixing the standard sand with the fine grained soil(passing of #200 sieve) whose rate is from 5% to 50% respectively. The test results are follows. 1) Specmens with 25%-30% fine grained soil shows maximum density but the permeability is not proportional to the density. 2) The relation between dry density and void ratio is derived as following equation. <본문참고> Therefore it is known that here is close relation between dry density and void ratio. 3) The specimens up to 30% fine grained soil, permeability decreases proportional to straight line, but the specimens over 30% fine grained soil, the variation of permeability is almost neglegible. Where as the ralation between permeability and the fine grained soil content is as follows. 30% 〈 log K= -1.492-0.19x 30% 〉log K=-3.89-7.78×10^-2x-3.6×10^-5x^2 (x : fine grained soil cotent ratio) 4) Permeability diminishes on the increment of fine grained soils under the same void ratio on account of it varies with soil grains distribution and related to the size and shape of soil structure.

浸水된 다짐흙이 剪斷特性에 關한 硏究

劉範植 안성산업대학교 1984 論文集 Vol.16 No.-

The shear characteristics of soils change generally caused by soaking. The author have performed direct shear test in soaking and unsoaking samples on a silty sand and three clays prepared widely used for banking. The conclusions are summarized as follows: 1) The settlement appearance by soaking in loading is caused by disappearance of compressive force among the particles by capillary water, it is explained with Bishop's effective stress equation of partly saturation. 2) The lower of moisture content of sample, the sattlement showed a tendency to increase when silty sand and non compressive clay is soaked on loading. 3) The shear strength of soils is caused by decrease for lubrication of inter-particles with permeated water. Hense, this fact must be considerated for design of banking structures. 4) According to increment initial moisture in soaking and un-roaking samples, variation of soil structure to take influence of shear strength characteristics didn't appeared. 5) The higher of compressive soils, dilatancy index in soaking samples is lower than it of unsoaking.

數値解析을 利用한 粘性土地盤에서의 Retaining Wall의 擧動에 關한 硏究(Ⅰ)

劉範植,金仁培 안성산업대학교 1989 論文集 Vol.21 No.-

This paper deals with the behavior of retaining wall on soil condition and wall stiffness in clay soils. The results of study are as follows. 1. The passive earth pressure in low stiffness sheet pile is larger than it in high stiffness diaphram wall and elasto-plastic limit depth is deepened at the excavation depth of 5.5m above. 2. The deflection in deaphragm wall is more small than sheet pile and the more cohesion increased without relating wall stiffness, the more max, deflection is decreased, also, bending moment in deaphragm wall is lager than sheet pile. 3. When the retaining wall in clay in designed, there is need to design by introducing earth pressure modeling of elasto-plastic equilibrium state.

다짐한 不飽和 粘性土의 剪斷 强度 特性에 관한 硏究

劉範植 안성산업대학교 1992 論文集 Vol.24 No.-

This study carried out to investigate characteristics of compacted unsaturated cohesive soils widely used for construction of fill dam, road, residential and industrual site. It is performed undrained unconsolidation compression test, isotropic triaxial compression test and average principal stress test in constant condition. Testing conditions are ; 1) dry density is constant, variable water content, 2) water content is constant, variable dry density. The results of study are as follows ; 1. The stress conditions in triaxial compression test are considered average principal stress component and purely shear component. 2. The shear stress of soil used in evaluated smaller about 20% in accordance with correction of volumetric strain by shear component. 3. Volumetric change in accordance with average principal stress increment are corrected by time effect only considered, exist doubt on a propriety. 4. The difficult problem in unsaturated soil on theory are remained today, therefore this results are useful for analysis of unsaturated soils behaviour.

벽체의 뒷채움이 제한되어 있는 경우의 토압산정이론식

유범식,김훈제 안성산업대학교 1996 論文集 Vol.28 No.-

In case that the length of Backfill behind wall is confined, the active earth pressure acting wall will be reduced as compare with that calculated by conventional active earth pressure theories. Consequently, in this research , the theoritical formula of active earth pressure is proposed and conclusions are following. The angle of failure plane, 'α' of backfill soil is inclined to reduce as 'B/H' increase regardless of the angle of internal friction of backfill soil and earth pressure increase as the angle of internal friction reduce. The reduction effect of active earth pressure according to backfill length increase as 'B/H' more reduce than 'B/H=0.6'.