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원찬희,정팔진,김민정,조선영,김세훈,김종천 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2002 工學硏究 Vol.33 No.-
Nonpoint source pollution(NSP) arises due to agriculture activity and it is quite an extensive and complicated problem in order to control and has received a great deal of concern during the recent years, whereas point source are known to originate from an estimated volume of contaminant discharged from a distinguishable source. Extensive research work have been conducted and presented in the past with regard to the various characteristics of watershed on Dong Jin River(DJR), however there are certain drawbacks of existing survey for determining important polluting sources, distribution features of pollutants and estimated load of the organic and nutrients from the creeks. Unfortunately, investigation for loadings originating due to agricultural drainage was not satisfactory, although the regional consideration for DJR across Kim Je Field(KJF) as an agricultural area receives a reasonable source point in the agri-pollution management. Therefore it was necessary to carry out a thorough investigation into the diffuse sources resulting, to form the pollution-developing estimation and to evaluate the output roperties and determining various factors in the generation of non-point pollution. Eventually, this research work would serve as an useful tool for the development of predictive pollution management for DJR. Non-point sources in the present work were classified as municipal non-treated sewage water discharged into the river, loadings through agricultural drainages in the dry/wet field and inadequate treatment of wastewater generated from livestocks. The entire duration of the research work was from December-2001 to July-2002. Site measurement were conducted during various season, in a dry season(December), in rainfall, in seed-sowing time and also collecting data from the rural public organizations related to water management was done and examined and examined during the mid of research work. Similarly, domestic wastewater loadings due to population was based on area unit, as City, Country, Up, Myon, Dong, Ri. The Dong Jin River watershed contains small three Creeks, KoBu(KB), DongJin(DJ, including JeongEup(JE) and ChilBo(CB), WonPyong(WP). It was further divided into 32 sub-watersheds which comprises of further 5,18,9 watersheds in the creeks respectively. The results obtained from research work are presented as follows. Animal productions have marked differences in the rate of pollutant loadings reported in the following sequence: DJ(only CE)>WP>CB>KB, in a case of Korean cow and milk cow. However, it was revealed that WP creek became significantly higher than any other livestocks. According to statistical data for land use, rice field(369.0㎢) and forest(378㎢) have much occupation prior to dry paddies(125.0㎢), residential land(32.0㎢) and others(5.0㎢). Especially, rice fields receives 2.5∼3 times than dry paddies in size.
원종진,이종선,윤희중 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-
In this study, using linear and nonlinear deformation theories and by closed-form analysis and finite difference energy methods, respectively, various buckling load factors are obatined for stiffened laminated composite panel with trapezoidal type stiffeners and various longitudinal length to radius ratios, which are made from Carbon/Epoxy USN 125 prepreg and are simply-supported on four edges under uniaxial compression, and then for them, optimal design analyses are carried out by the nonlinear search optimizer, ADS.
Won, Hyun Kyu,Jeon, Hyon Sun,Han, Hee,Lee, Seung Jung,Jung, Byung Heon Institute of Forest Science 2017 Journal of Forest Science Vol.33 No.4
This study was aimed to analyze the increased forestry incomes by combining timber production and wood processing, which is one of 6th industrialization types in Korean forestry. The selected household has been engaged in forestry for two generations and they produce timber and associated wood products in their own facility. The wood products include dimension lumber, interior wood material, cutting board, and cube chips, the household also utilize logging and sawmill residues as well as seed and seedlings as by-products. Incomes and expenses that have been incurred on individual processes of the sequential timber production and wood processing were surveyed, and we analyzed the economic outcomes of entire business. The results of this study indicate that the gross income of the household is 122.3 million Korean won and the net income is 93.6 million Korean won. The net income of the household is approximately 2.8 times higher than the average net income of whole households in the forestry of Korea in 2016, which is approximately 4.3 times higher than that of households that have been particularly engaged in timber production over the country. We found that the 6th industrialization by combining the two sequential processes creates approximately 3.2 times as much added value compared to the case relying on timber production only.
원종진,이종선,윤희중,김형철 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-
This study is object to structural analysis of high pressure injection nozzle. The finite element model was developed to compute the stress, strain for high pressure injection nozzle. For structural analysis using result from FEM code. This structural analysis results, many variables such as internal pressure, boundary condition, constraint condition and load condition are considered.
김혜원,이선희,임수정,박형진,김태신,송은식,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2009 動物醫科學硏究誌 Vol.16 No.1
A 10-year-old, male, poodle dog was referred to the Veterinary Medical Teaching Hospital of Chungnam National University because of continuous cough and cardiomegaly. Weight gain, lethargy, unwillingness to exercise and decreased activity was revealed on history. Obesty and alopecia was also observed on physical examination. Hypercholesterolemia and increased ALP was revealed on blood exam. So, evaluation of thyroid gland function was performed and cTSH concentration was increased. tT4 and fT4 concentrations was decreased. Results of a history, physical examination, blood exam, and thyroid gland fuction test support a diagnosis of hypothyroidism. Initial therapy with sodium levothyroxine was indicated. On 32 days after treatment of hypothyroidism, clinical signs was relieved and cTSH concentration was decreased, tT4 and fT4 concenctrations was increased.
제주도 한라산 1100 고지 대기 에어로졸의 조성 및 특성
김원형,강창희,신찬성,고선영,홍민선 濟州大學校 基礎科學硏究所 2003 基礎科學硏究 Vol.16 No.1
The atmospheric aerosols collected at the 1100 site located in Mt. Halla have been analyzed to investigate their compositions and chemical characteristics. The average concentrations of water-soluble cautions were in the order of NH_(4)^(+)>Ca^(2+)>Na^(+)>K^(+)>Mg^(2+) during the spring, showing high increase of Ca^(2+) concentration with the value of 0.60㎍/㎥, and NH_(4)^(+)>Na^(+)>K^(+)>Ca^(2+)>Mg^(2+) during the other seasons. The average concentrations of anions have shown in the order of SO_(4)^(2-)>NO_(3)^(-)>Cl^(-) for all seasons, and SO_(4)^(2-) and NO_(3)^(-) had higher concentrations in spring with the values of 4.84㎍/㎥ and 1.08㎍/㎥, respectively. From the analytical data of size-segregated particles by cascade impactor sampling, the components of NH_(4)^(+), SO_(4)^(2-), NO_(3)^(-) and K^(+) were distributed mainly in fine particles, but Ca^(2+), Na^(+), Mg^(2+) and Cl^(-) were included mostly in coarse particles. The correlation coefficients of nss-SO_(4)^(2-)/NH_(4)^(+), nss-SO_(4)^(2-)/K^(+) and NO_(3)/nss-Ca^(2+) showed quite high values with 0.871, 0.857 and 0.654, respectively. Based on the study of enrichment factors, it is considered that Na^(+), Mg^(2+), Cl^(-) and Ca^(2+) components were delivered from oceanic and soil sources, but SO_(4)^(2-), NO_(3)^(-) and NH_(4)^(+) might have other source origins. The factor analysis study showed the aerosol at the 1100 site was influenced mainly by anthropogenic factors, followed by oceanic and soil factors.