農業用 管水路系의 水擊壓 檢討

愼英喆,李元洪 진주산업대학교 1992 論文集 Vol.31 No.-

본 연구에서는 물관리의 最適體系化를 추진할수 있는 관수로계에서 適正用水 配分를 위하여 밸브 開閉時刻에 따른 壓力水頭와 流速을 계산하여, 관수로계에서 適水能에 영향을 주는 水擊壓의 水理的 特性을 고찰하였으며, 분석된 결과를 요약하면 다음과 같다. 1. 밸브의 폐쇄와 동시에 壓力水頭가 상승하고, 流量의 감소에 따라서 壓力水位가 靜水位에 접근함을 알수 있다. 2. 上昇壓의 높이는 밸브의 개폐시간과 상관이 있으므로 폐쇄시간을 길게하면, 상승압은 낮아지고 짧게하면 높아진다. 예를들면, CASE Ⅰ에 있어서 폐쇄시간을 60초로 하면 40초 일때에 비하여 압력상승이 4.71m 저하하며, CASE Ⅲ의 경우는 폐쇄시간을 90초에서 60초로 변화시켰을 때 압력상승이 7.67m 저하하였다. 3. 軟性水路에 制水施設이 있는 폐쇄수로에서 수격압은 淨水壓이 3㎏/㎠(30m)이하인 경우 정수압의 100%로 하는데, 검토 결과 이와 비슷한 수격압을 얻을 수 있었다. 이상의 결론에 의하여 농업용 관수로계에 의한 시설 계획은 농업용수의 질적 운용관리에 있어서 매우 효율적이라 판단되었다. 본 연구에서는 CASE別 수격압 만을 검토하였으나, 향후 펌프나 밸브 등의 동작으로 인하여 발생하는 수격압의 크기가 판수로의 耐壓强度에 미치는 영향과 관수로의 附帶調整水槽에 에 발생하는 水面振動이 시설규모에 미치는 영향 등에 대한 검토와 대책에 대하여 연구되어야할 것으로 사료된다. In order to provide the fundamental data fot the optimal irrigation water distribution in planning water management facilities by the agricultural pipeline system, the hydraulic charateristics in the pipeline system were studied through the pressure head and the velocity with valve opening times. The results analysed and obtained are follows ; 1. The pressure head rises at the same time as the valve closing and according to decrease of the mount of flowing water, we know the pressure head move in close to the hydrostatic head. 2. As the height of the rising pressure has relation with valve opening times, if valve closing times makes longer the rising pressure becomes low.

신수혈의 침자극과 황기약침이 실험용 생쥐의 면역활성물질인 IL-1 α의 遺傳子發現에 미치는 影響

申相習,朴元煥,洪文燁,李泰均,崔達永 대한동의병리학회 1999 동의생리병리학회지 Vol.13 No.2

체내의 환경을 항상적으로 유지하는 생체방어체계에는 면역활성물질이 있으며, 이러한 면역활성물질의 적절한 발현이 생체의 항상성을 유지하는데 작용하게 된다. 이에 한의학에서는 생체의 항상성 유지와 체내의 면역력 증가를 위해 많은 요법들이 시행되어 왔는데, 그 중 자침요법과 약침요법이 많이 응용되고 있다. 그러나 침자극과 약침의 효과에 대한 기전은 기대하는 만큼 제시되지 못하고 있다. 이에 본 논문은 침자극과 약침의 효과에 대한 기전을 밝히는 방법의 일환으로서 면역활성물질인 IL-1α가 補腎臟, 振氣化, 祛水濕, 强腰脊, 益水壯火 등의 穴性이 있는 신수혈(BL23)의 침자극과 황기약침처치를 통해 어떻게 발현하는가를 관찰하였다. 그 결과, 면역 증강 작용을 나타내는 cytokine IL-1α 에 대한 침자극의 반응은 관찰되었고, 황기약침에 의한 IL-1α 의 발현은 명확하지 않았다. 그러므로 신수혈을 이용한 cytokine IL-1α의 추적은 황기약침의 효과보다 침자극의 효과에 대한 근거를 추측할 수 있을 것이며, 뿐만 아니라 침자극에 의한 면역반응정도를 통해 질병의 진행상태를 나타내는 진단지표로서 활용가능성이 있을 것이다. Acupuncture and Radix Astragali aqua-acupuncture stimuli have long been used to cure human diseases. However, it still remains to be unknown on its action mechanism, physiological and biochemical aspects. Thus, many attempts were made to show the scientific background covering the above mentioned mechanisms. Most recent studies show that these tests improve blood circulatory system and increase leucocyte counts. In this study, we have applied the acupuncture stimuli to mouse Sinsu(BL23), which is a stimulative point of oriental medicine, to see if cytokine such as IL-1α can be detected. Mice were treated with lipopolysaccharide(LPS) for inflammation induction, and then reverse transcriptase-polymerase chain reaction (RT-PCR) using each primer set was performed to trace the amounts of mRNA. The results are as follows ; 1. The RT-PCR product using IL-1α primers was detected as 450 bp on agarose gels and the IL-1α gene was not expressed in normal mice at 15 min after the removal of acupuncture. However, it was gradually increased indicating a faint expression after 30 min. 2. IL-1α was expressed in LPS-treated mice 30 min after the acupuncture was pulled out, and expressed most highly at 3 h after the removal of acupuncture. The gene expression of LPS-treated mice were more effective than those of normal mice. 3. IL-1α was not expressed in normal mice and LPS-treated mice from 30 min to 3hs. after Radix Astragali aqua-acupuncture stimulation. Therefore, a tracing the gene expression of cytokine IL-1α can be used more not only for a basis of the effect of acupuncture stimulation but a diagnosis guide through the immunological action than the effect of Radix Astragali aqua-acupuncture. Moreover, we need to further study the cytokine's expression in Radix Astragali aqua-acupuncture stimulation.

조경설계의 대안적 방법에 관한 연구 : 꼴라쥬 기법의 가능성에 대해

김신원,박수영 경희대학교 디자인연구원 2006 예술· 디자인학연구 Vol.9 No.1

Today landscape design looks tendency that is complex and is pluralistic condition. This shows aspect that machine by expression means is more complex being undergone the change by considerations means. We use expression 'Collage' when we speak about complex, hybrid, heterogeneous, pluralism trend, Actually, collage techniques in conversation changed variously flowing cubism, futurism, dadaism, surrealism. Therefore, speech called Collage' that is used in complex expression vocabulary of trend can know that is including phenomenon side as well as techniques side. Approach from collage techniques as art and analyze through literature investigation about background and meaning of techniques, and utilization studied possible techniques in landscape design. With change age through this research, can know whether classical methodology can not express variety of expression method and 'Collage expression' as access methodology of modern landscape design presents possibility of how various expression. Wish to put meaning of research that present methodology freshing complex expression method.

공급률 및 탈곡통 길이 변화에 따른 자탈형 콤바인 탈곡 성능

서신원,이상우,허윤근 충남대학교 농업과학연구소 2006 농업과학연구 Vol.33 No.2

Threshing loss was increased due to dropping of the threshing efficiency when the 4 row head-feed combine harvested 5 row rice to improve harvesting performance of a combine. Reasonable design criteria were examined to determine the ranges of both of feed rate and the length of threshing drum for the 4 row head-feed combine being used as a 5-row combine. Harvesting performance increased as working width or working speed increased, it resulted in 15% increase when the working width increased from4 row to 5 row. Harvesting operations of the 4 row combine performed normally in the 4 row rice in threshing loss less than 1%, however, threshing loss increased to 2.25% in the 5 row due to poor threshing efficiency. The length of threshing drum was increased from 710 mm to 810 mm as well as the speed of crop feed chain was increased from 0.61 m/s to 0.75 m/s so as to improve the poor threshing efficiency resulted from the enlarged working width from the 4 row to the 5 row, which would decrease threshing loss less than 1%.

정보통신산업이 국가경제에 미치는 영향분석

강신원,이윤선 聖潔敎神學大學校 社會科學硏究所 1998 社會科學硏究 Vol.5 No.1

현재 정보통신산업은 국가의 기간산업으로써 경제발전에 필요한 사회간접자본을 공급하는 산업으로 인식되고 있다. 또한 국민 경제적 영향력과 국가경제에서의 역할 및 타산업의 파급효과는 날로 증대되고 있으며 정부도 그 중요성을 인식하고 정책적 지원 및 투자를 가속화하고 있다. 따라서 본 연구는 정보통신사업의 국가 경제적 위치와 효과를 분석해보고 향후 동산업에 대한 정책적 지원방향을 제시하였다.정보통신산업의 계속적인 무역수지 흑자는 IMF경제체제의 돌파구인 수출증대에 중요한 역할을 하고 있다. 또한 정보통신산업의 산업별경제성장 기여도는 1992년 5.8%에서 1995년 23.1%로 그 기여도는 크게 확대되고 있으며, 물가안정에도 크게 기여하고 있다. 더불어 고용창출에 기여함으로서 현재와 같은 대량실업상태에서 고용안정에 도움을 주고 있다.하지만 정보통신산업을 유성지원하기 위해서는 정부의 지속적 관심과 투자 및 강력한 지도력이 요구되며, 수입대체와 부가가치효과 및 고용확대를 위하여 중소부품업체 및 벤처기업육성이 절실히 요구되는 것으로 연구되었다.

Gd₂O₃doped CeO₂의 미분말 합성 및 소결특성

이주신,김원중,박성용 경성대학교 공학기술연구소 1999 공학기술연구지 Vol.6 No.-

10mol% Gd₂O₃doped CeO₂ doped fine powders were synthesized by the oxalate coprecipitation method and then their powder characteristics and sintering behavior were studied. The characterization of powders has been investigated using thermogravimetry and differential thermal analysis for thermal analysis, X-ray diffraction for phase identification. Brunauer-Emmett-Teller, X-ray diffraction-line broadening and transmission electron microscopy for particle size and morphology determination. The sintering behavior were investigated by means of the sintering density measurements and scanning electron microscopy techniques. The characteristics of powders prepared by the oxalate coprecipitation method and their sintering behavior are discussed.

PEO가 첨가된 원형관 난류운동에서의 마찰저항 감소 측정

이동원,김신,현명택,천원기,이보안 濟州大學校 工科大學 産業技術硏究所 1998 尖端技術硏究所論文集 Vol.9 No.2

The drag reduction by polymer additive is a well-known phenomenon and has been widely studied due to its high usefulness. In this study. in order to obtain the fundamental data on the drag reduction by polymer additive. we measured the friction factors in the polymer added turbulent flow through a circular pipe for Reynolds number ranging 10000∼50000. As Polymer additive, PEO (polyethylene oxide : molecular weight 4×10의 6제곱)was used. We also performed the experiments varying the concentration of PEO from 3 to 24 wppm to investigate the effect of the PEO concentration on the drag reduction. We observed more than 25% drag reduction under the above experimental conditions and the most effective drag reduction was found at 6 wppm (31% drag reduction).

만능형 머시닝센터의 진동실험 및 절삭안정성 예측

이신영,김종원 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

There have been many researches on machine tool vibration and chatter to obtain assessment procedure and more productivity. In this paper chatter limit is predicted on a universal machining center which used a parallel mechanism. The prediction method uses the combination of structural dynamic characteristics and cutting dynamics. So the dynamic characieristics were obtained by vibration experiments. We showed the unstable cutting conditions, and from them we could plot the unstable borderlines.

인천가정지구 공동주택단지 외부공간 기본계획

김신원,윤성호 경희대학교 디자인연구원 2005 예술· 디자인학연구 Vol.8 No.2

New Town is being constructed and planned in and around the Metropolitan area for residential supply, this development will be increased for the residential supply of low income layer according as we forecast landscape architecture plan which in apartment Plans increase. Now constructed apartments is improving in quality but so far a biased function design have bring about insufficiency of community space. This thesis is purposed to present design for revitalization of community space in the landscape architecture plan which in apartment plan.

濟州島 4개 噴火口의 動物相[1] : 半?類 昆蟲種의 分布 Distribution of Hemipteran Species

金源澤,朴行信 제주대학교 1981 논문집 Vol.13 No.-