石炭, 洋灰關聯産業이 嶺東地域經濟에 미치는 波及效果 分析

박형래,강영갑,양정식,류한천 강릉대학교동해안지역연구소 1994 東海岸硏究 Vol.5 No.1

본 논문의 목적은 지역산업연관표를 이용하여 영동지역의 산업연관 관계를 계량적으로 분석하는데 있다. 이러한 산업연관 분석방법은 영동지역의 산업상호간 경제활동과 구조적 특징을 체계적으로 분석하고 장래의 산업 변화에 대한 예측을 가능하게 한다. 본연구의 결과에 나타난 몇가지 중요한 점은 다음과 같다. 첫째, 석탄, 양회산업은 지역산업연관효과가 매우 높은 수준으로 측정됨으로써 이들 특화산업이 지역발전의 선도산업으로서 중요한 역할을 수행하고 있음을 보여주고 있다. 둘째, 이들 두 산업이 영동지역내에서는 중요한 산업이지만 양회산업의 경우 지역전체 생산에서 차지하는 비중이 매우 높은 산업임에도 불구하고 고용승수로 측정되는 고용효과 측면에서는 그 영향이 그리 크지 않은 것으로 나타났다. 이것은 시멘트 산업이 자본집약적인 장치산업으로서 자본의 규모에 비해 고용자를 많이 사용하지 않기 때문인 것으로 평가된다. The purpose of this study is to analyze the quantitative characteristics of the Young-Dong regional economy in industrial interleatedness by using the 1990 I-O table. The analysis of this structural character and industrial interrelatedness makes it possible to estimate the current structural problems and future prospects of Young-Dong regional economy. The findings of this study can be summarized as follows: 1)The coal mining and cement industries sector have relatively high and wide-spreading positive impacts on the regional output and income. 2)Above two sectors showed different impacts pattern on the employment. Coal mining sector gives relatively higher impacts on the regional employment but cement industry sector gives lower impacts on the regional economy because cement industries sector is labor saving industries with large equipment requirement.

모체 Thyroxine 투여가 태아알코올효과를 가진 흰쥐 대뇌겉질 및 해마에서 NPY함유 신경세포의 생후 발달에 미치는 영향

김복,박상기,박영란,김종중,문정석,김주수,문영민,현영식,천관영,정윤영 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.2

Background and Objectives: Maternal alcohol abuse is considered to be one of the most prominent cause of neurobiological malformations in the postnatal and adult life of the offspring. In this study, we investigated the effects of maternal alcohol drinking on the postnatal development of NPY-containing neuron, and, the influence of thyroxine treatment on the cerebral cortex and hippocampus of pups of alcohol abused mother. Materials and Method: Time-pregnant rats were divided into three groups. Alcohol-fed group A received 35 calories of liquid alcohol diet daily from gestation day 6; control pair-fed group B was fed a liquid diet in dextrin replaced alcohol isocalorically: alcohol + T4 group C received 35 calories liquid alcohol diet and exogenous thyroxine subcutaneously. Results: Group C showed prominent NPY immunoreactivity in the cerebral cortex compared to group A and B at P7. In group C, NPY-containing neurons were widely distributed in the all layers of cerebral cortex after P14. Besides, numerical decrease of NPY-containing neuron as age increases was not found in group C. However, the decrease of NPY-containing neuron was clearly observed in group A compared to group C after P14. In hippocampus, group Band C were appeared similar patterns after P7. Additionally, in group C, NPY immunoreactivity was prominently appeared in CA2 and CA3 at P14 as compared to group B. Conclusions: The present results showed the increase of intensity and number of NPY-containing neurons in cerebral cortex and hippocampus of pups of exogenous T₄ supplemented alcohol-exposed dams as compared to control pair-fed and alcohol-exposed pups at P7. It presumably suggest that NPY-containing neurons might be regulated by the early postnatal growth stimulatory effect of the exogenously supplemented T₄. Therefore, the increase of NPY synthesis caused by maternal administration of exogenous thyroxine may ameliorate fetal alcohol effect, one of the ill effects as a result of the dysthyroid state following maternal alcohol abuse.

광양 광화대지역에 분포하는 음용지하수에 대한 지구화학적 연구

박천영,고진석,정연중,김성구 조선대학교 에너지.자원신기술연구소 2000 에너지·자원신기술연구소 논문지 Vol.22 No.2

The objective of this study is to investigate the geochemical characteristics of groundwater at Kwangyang area. Twenty two groundwater samples were collected and analyzed in vicinity of gold deposits area. The pH, Eh, EC, TDS and DO contents were measured in the field and, cation elements such as K, Na, Mg, Si, Ca, Fe, Al, Cr, Mn, Cu, Zn, As, Cd, Se. Hg, Ge and Pb were analyzed by GFAAS, AAS. ICP-MS. Anions, Cl, NO₂, NO₃and SO₄ were analyzed by IC and the HCO₃ contents were determined by titration with Phenolphthalein and. Methyl red-brom cresol green TDS vs TDI, Ca, K, Na, Mg, Zn and As contents were clearly related each other. Most groundwater showed a calcium-sulfate dominating water quality type in the Piper s diagram. On stability diagrams, the groundwaters were included in the kaolinite stable area. The increase in the Na contents correlates positively with the Cl content in the groundwater. The contents of NO₃is particularly enriched in groundwater that suggest the impact of domestic waste water results in an increase of Cl contents in the shallow groundwater.

西歸浦 沿岸海水의 海洋化學的 特性

朴吉淳,梁千益,崔永贊 濟州大學校海洋資源硏究所 1986 해양과환경연구소 연구논문집 Vol.10 No.-

1981年 10月부터 12까지 3 個月間 西歸浦 앞바다의 水質을 調査한 結果는 다음과 같다. 西歸浦 沿岸은 蚊島와 森島를 連結하는 곳을 中心으로 沿岸水와 外海水가 만나는 潮境域이 形成되고 있으며 이 潮境域을 中心으로 沿岸쪽의 營養鹽 濃度가 窒酸鹽을 제외하고는 外海쪽보다 낮다. 西歸浦 沿岸은 韓國 南西海 沿岸에서처럼 11月경이면 成層이 破壞되어 沿直混合이 일어나 表層과 底層의 營養鹽 濃度가 均一해진다. 窒酸鹽과 燐酸鹽 사이에는 좋은 相關關係 (r=0.76)를 갖고 있으며 窒酸鹽=7.63 ×燐酸鹽 - 0.31, N : P=7 : 1 이었다. In the coastal region of Seogwipo, a tidal front where coastal and offshore water are met is thought to be formed in the area where Mun Do and Sam Do are connected. The concentration of nutrients in the surface layer is higher in offshore water than those of coastal seawater except for the nitrates. In this region stratified state is broken in November as in off the southwest coast of Korea, and become homogeneous in the distribution of each constituents. This homogeneous state is maintained in December as well. Linear regression equation is nitrate = 7.63 ×phosphate - 0.31(=0.76), and N : P=7 : 1.

불연속 양단 자유보(미사일 모델)의 최대추진력에 관한 연구

박영필,강승천 연세대학교 산업기술연구소 1985 논문집 Vol.17 No.1

In this study, the dynamic stability of a launch vehicle with non-uniform mass and bending stiffness distributions is analyzed. The launch vechile is idealized as a free-free Euler-Bernoulli beam subjected to a controlled constant follower force. For the study, finite element model is formulated through the extended Hamilton's principle. The effects of the fuel consumption on the dynamic stability behavior of the launch vehicle is studied for various gains and locations of the direction control sensor.

Type Ⅳ 과지질혈증에서 나타난 다발성 건 황색종 : 1례 보고 One Case Report

천동욱,김홍태,박봉훈,변영수,홍순만,손경락,문세광 최신의학사 1992 最新醫學 Vol.35 No.10

만성 위염전 2 례

박찬규,이동욱,남성진,김추성,조성래,구본천,박영재,허규찬 啓明大學校 醫科大學 1997 계명의대학술지 Vol.16 No.3

위염전은 위의 비정상적인 회전으로 생기는데 급성증에서는 진단이 늦어질 경우 치명적일 수도 있으나, 만성증의 경우는 비특이적 위장관 중상을 나타내며, 치료되지 않을 경우 수년 동안 증상이 지속될 수도 있다. 최근 저자들은 소화불량, 식후 상복부 동통을 주소로 내원한 환자에서 만성위염전 2 례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Gastric volvulus is an abnormal rotation of the stomach. Gastric volvulus may present as an emergency or as a chronic condition. Acute volvulus si potentially lethal if unrecognized, while a chronic volvulus may cause symptoms for years if not treated. Gastric volvulus may be more common than previously estimated. Approximately 700 cases have thus far been documented. In patients with vague upper abdominal pain, bloating, vomiting, early satiety and weight loss, chronic gastric volvulus are reported and the related literature reviewed. The clinical presentation, diagnosis, and treatment are treatment are discussed. Features of acute and chronic volvulus are compared.

산성광산배수 및 증발잔류광물에 대한 지구화학적 연구

박천영,정연중,박신숙,김성구 조선대학교 에너지.자원신기술연구소 2001 에너지·자원신기술연구소 논문지 Vol.23 No.1

This study investigated geochemical characteristics of acid mine drainage(AMD) discharged from the abandoned coal mine and gold mine. Water sample of acid mine drainage were collected from 9 locations at Hwasun, Kwangyang, Chonam, Taback and Sangdong area. The yellowish and brown color of evaporated material was prepared by air dry for 9 acid water samples during 20 days in the laboratory As the 9 acid water samples become fully drying, the concentration of this water become progressively more concentrated and its may be eventually reached saturation with respect to either gypsum or ferrohexahydrite. The value of density for acid mine drainage increase with increasing TDS and EC values. The value of activity for acid mine drainage increase with those real ion concentration. The x-ray powder diffraction studies identified that the evaporated materials were gypsum, ferrohexahydrite and kaolinite. Diagnostic peaks used for identification of gypsum were the 7.62, 4.28, 3.80, 3.07, 2.88, 2.68, 2.22, 1.90 and 1.62Å peaks. Diffraction peaks at 6.00, 5.48, 5.13, 4.89, 4.40, 3.46, 3.20, 3.03, 2.97, 2.94, 2.79, 2.27 2.09Å may indicate ferrohexahydrite. In the SEM and EDS analysis, the crystals of acicular and columnar in the evaporated materials probably shown the gypsum.

증발잔류 광물의 광물학적 연구

박천영,박신숙,김성구,조갑진,임성수 조선대학교 에너지.자원신기술연구소 2003 에너지·자원신기술연구소 논문지 Vol.25 No.1

This study has focused on mineralogical and geochemical characteritics of evaporated minerals from the mine waters and on variation of constituents in mine water during the evaporation The evaporated minerals are shown in mine waters at the field. In order to form of evaporates in the laboratory, mine waters were sampled from the abandoned mine area(HS, LG and BJ) and were air dried in laboratory for room temperature. During the evaporation of mine waters, TDS, EC values and the concentration of major and minor ions increased, whereas dissolved oxygen(DO) values decreased with the sampling time. Gypsum, epsomite, kaolinite, dolomite and illite were identified in BJ sample, gypsum and epsomite were observed in LG sample, and gypsum, epsomite and vermiculite were founded in HS sample by x-ray powder diffraction studies. The infrared spectra for evaporated minerals show major absorption banded due to OH stretching, adsorbed molecular water and sulfate stretching, respectively. Evaporated minerals were heated at 65, 150, 250 and 350℃ for 1 hour in electrical Furnaces. Gypsum transformed the bassanite at 150℃ heating temperature and epsomite transformed the hexa-hydrite at 65℃, and then converted the kieserite at 250℃. With increasing heating temperature, the intensity of absorption OH band(3407 11㎝^(-1)), adsorbed molecular water band (1654.39㎝^(-1)) and sulfate stretching band (1113.46㎝^(-1)) were decreased, whereas sulfate stretching bands(668.35㎝^(-1) and 603.85㎝^(-1)) were relatively increased in IR due to dehydration.

강원도 함백폐탄광지역에서 생성되는 광산배수의 수질 특성

박천영,정연중,김성구,조갑진 조선대학교 에너지.자원신기술연구소 2001 에너지·자원신기술연구소 논문지 Vol.23 No.2

This study investigated geochemical characteristics of the mine drainage discharged from the abandoned coal mine in the Hamback area. Sampling of stream waters(21) were carried out in the Hamback area. The pH, EC, TDS, Eh and Do contents were measured in field and ions such as Na, K, Mg, Ca, Mn. Fe, S r , Al. Cr, Cu. Zn, Ge, As, Mo, Cd, Sb, Ba, Pb, F, Cl. No₃ and SO₄ were analyzed by GFAAS, AAS, ICP-AES, ICP-MS and IC. In stream waters, pH values increased, whereas total dissolved solids(TDS), electrical conductivity(EC) and dissolved oxygen(D0) values decreased with distance. Eh negative values a t upstream site were found, suggesting that its caused by the organic material in the retention pond, and these value in stream water effluent from the retention pond increased progressively with distance. The concentration of toxic heavy metals and major cations except Na, Cl, No₃, Cu, Mo and Sb decreased rapidly due to retention pond, but the concentration of Na, Cl, No₃, Cu, Mo and Sb increased gradually with distance. The concentration of Na, Cl and No₃ increasing with distance, which indicate by domestic waste. Major ions, such as Na, K, Ca, Mg, F, Cl, SO₄ and HCO₃ were statically analyzed in order to investigate relationship with TDS contents. M is observed that TDS contents have-positive relation with K, Ca, Mg, F, so4 and HC0₃ contents, but negative relationships with Na, Cl and No₃ contents. Most stream surface waters showed a calcium-sulfate and noncarbonate hardness dominating water quality type. In geochemical modeling for stream surface waters, the saturation index of gibbsite were oversaturated with respect to gibbsite.