Effects of Cultivation Management Practices on Soil Chemical Properties and Microorganism Activities in Citrus Orchard Soil

Han?Choel Lim,Seung?Jong Jeon,Jae?Ho Joa 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

生態親和的 飼育環境 制御方式 確立을 위한 누에 核多角體病 發生要因 分析

韓明世,林鐘聲 慶北大學校農業科學技術硏究所 1997 慶北大農學誌 Vol.15 No.-

世界的으로 養蠶地域에서 큰 피해를 주는 核多角體病은 養蠶現場에서 蠶室 蠶具類의 철저한 포르말린 소독에도 불구하고 예방효과가 疑問視되는 경우가 발생하며, 이는 병원체의 存否 만으로 본 疾病의 蔓延이 설명될 수 없기 때문이라는 사실을 實驗病理學的으로 立證하였다. 核多角體病의 發生을 助長하는 不良 環境要因을 파악하기 위하여 1979년부터 1993년 까지 15년간 한국 일본 필리핀 등지에서 57건의 사육사례를 조사하였다. 環境狀態와 發病事例의 연관성을 분석하므로써 發病生理와 관련된 環境要因을 해명한 결과, 고름병 發生頻度는 상엽육과 인공사료육 간에 비슷한 경향을 나타내었고, 잠실 잠구류의 消毒방법에서는 포르말린 消毒 與否에 따른 차이가 인정되지 않았다. 交雜種은 原種보다 核多角體病 발생율이 다소 높은 수준이었으며, 특히 애누에때 부터 장기간 通氣不良인 사육환경에서는 發病率이 현저하게 높았다. 또한, 1993년부터 1997년 까지 5년간의 實證試驗에서는 蠶室 및 蠶具類의 청소와 사육실의 强制循環式 換氣로 사육환경을 개선하므로써 人體에 有害한 농약을 사용하지 않고도 누에 核多角體病 발생을 효율적으로 제어할 수 있음을 立證하였다. For the prevention of worldwide prevalent disease of nuclear polyhedrosis virus (NPV), environmental conditions and their incidence of grasserie was investigated through 57 cases of silkworm rearing from the year of 1979 to 1993 in the countries of Korea, Japan, and Philippines. Relationship between the occurrence of NPV and environmental factors were also analysed from the aspect of causal pathogenesis. Unfavorable foactors related to the prevalence of NPV disease was reconfirmed by the assay of experimental rearing. Silkworms reared on mulberry leaves or artificial diet appeared similar result on the occurrence of grasserie. Disinfection by formalin and simple sweeping or washing was not significantly different on the occurrence of NPV disease. Following insufficient ventilation on the younger larvae, from the 1st to 3rd instar, the disease by NPV at the later stage was remarkably emphasized those insidence. An experimental rearing from 1993 to 1996 demonstrated the prevention of NPV disease by simple cleaning of sweeping under the condition of air forced ventilation, the customal practice of disinfection with formalin or any other chemical agents could be omissible.

Utilization of motion graphic in Blog according to the use of Net Art

Lim,Jang Han,Kim,Jong Moo (사)한국디지털디자인협의회 2006 (사)한국디지털디자인협의회 conference Vol.2006 No.2

지능형 정속주행 제어시스템 개발

임영도,설재훈,한창훈,김승철,박종오,이준탁,방석원 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1

This paper describes an intelligent cruise control system for automobile. With the remarkable numericalincrease of automobiles on the roal, the optimized traffic flow control using the cruise control is one of the very important traffic problems to overcome the limitation of an existing road capacity. Based onthis idea that minimize the fuel cost and teh air pollution, and accept a driver's needs for driving, we have developed an intelligent cruise control system for vehicle. This proposed intelligent fuzzy cruise controller was successfully implemented using the fuzzy algorithm, the i80c196 μ-controller board and the throttle valve actuator. The field test results on an linear road was introduced.

家蠶에 寄生하는 Nuclear-Polyhedrosis Virus와 새로운 Microsporidia(Nosema sp. M_12)間의 相互作用

林鍾聲,韓明世 경북대학교 1981 새마을 硏究論叢 Vol.1 No.-

In the application of infectious microorganisms of insects to microbial control the interaction among those pathogens has been considered to be very important factors in causing synergism or intereference. In these respects this research was concentrated on the interaction between the nuclear polyhedrosis virus(NPV) and a newly isolated microsporidia, Nosema sp.(M_12) in the larvae of silkworm, Bombyx mori(L.), including comparisions of their pathogenecity and histopathological symptoms. The interference was observed between the two pathogens were incoculated per os to the second-instar larvae of the silkworm at the same time. In the response of the interaction the degree of interference by was greater than that by the NPV. However, the former pathognn M_12 was not interfered by the challanging NPV while the former NPV was considerably interfered by the challanging M_12 when they were inoculated per os at the intereval of 24 hours at the second-instar larvae. In the histopathological observations the sites of inteference were observed in some tissue like fat body or cell unit though one of the pathogens was dominant in each tissue. From the point of microbial control views it is neither recommendable to use NPV and M_12 at the same time nor the same areas in the case of both pathogens to be used as a microbial insecticide.

강원도 사북-고한 지역의 석탄광 폐석에 대한 물리적, 역학적 특성 연구

임한욱,정윤영,목진호,김종훈,김재동,신동오 강원대학교 석재복합신소재제품연구센터 1996 석재연 논문집 Vol.1 No.-

석탄광 폐석의 건설용 골재로서 활용 가능성을 검토하기 위하여 폐석의 주요 구성암석인 사암, 사질혈암, 혈암, 탄질혈암을 대상으로 기초물성실험, 역학적 실험 및 골재원 특성 실험을 실시하였다. 시험결과치의 평균값을 기준으로 할 때 사암, 사질혈암, 혈암은 골재로서 활용이 가능하나, 실험치의 분산도가 심하여 활용가능 폐석과 불가능한 폐석이 혼재되 있음을 확인하였다. 반면에 탄질혈암은 골재원 특성이 가능하나 강도등 물성에서는 사용이 곤란한 것으로 판단되었다. 따라서 앞으로 폐석중 활용가능한 사암, 사질혈암 및 혈암을 효율적으로 분급하는 방안과 금번에 실시하지 못한 골재의 알카리 반응시험 등이 추가로 보완되었으면 한다. An experimental program was undertaken to test rock wastes from coal mines, for use as a new source of aggregate. Physical and mechanical properties, required for aggregate materials, of major constituents of rock wastes including sandstones, sandy shales, shales, and coal shales, were measured in the laboratory. Test results showed that the sandstones, sandy shales and shales tested in this study might possibly be used for construction aggregates, the highly scattered test data indicated considerable proportion of unusable rocks. In case of coal shales, the aggregate characteristics were generally adoptable but some physical properties such as rock strength were lower than required. In conclusion, it is suggested that an effective procedure for sorting the rock wastes, and additional tests such as alkali-aggregate reaction should be supplemented.

석골재자원 개발을 위한 균열제어 발파모델 연구

임한옥,김재동,김종훈,백승규 강원대학교 석재복합신소재제품연구센터 1998 석재연 논문집 Vol.3 No.-

본 연구에서는 석골재 자원개발에서 널리 사용되고 있는 발파 조건을 고려하여 암반의 변형 및 파괴거동에 대한 특성을 규명하기 위한 컴퓨터 모델링을 시도하였다. 현재까지 이루어진 몇몇 연구들은, 발파에 의한 암반의 거동을 실제 동하중이 적용되고 있는 상태와는 달리 정적 상태 하의 조건에서 주로 이루어져 왔다. 그러나 실제 발파 거동은 동적 거동을보이므로 동역학적 해석을 하지 않을 경우 많은 오차를 포함한 상태하의 개괄적인 특성의 추정에 그칠 수밖에 없는 단점을 지니고 있었다. 본 연구에서는 동하중 하에서의 탄소성 해석을 실시하여 채석시 발파 하중에 대한 암반의 하중 반응, 탄성 및 소성 변형의 발생 특성, 그리고 이로 인한 발파 균열의 성장 전파 특성을 규명함으로써 발파로 인한 균열의 능동적 제어와 보다 효율적인 발파가 이루어 질 수 있는 조건들을 규명하고자 하였다. 해석 결과 일반 발파공의 경우에서 탄성 모델의 경우 공반경의 약 3배인 6cm까지 집중된 응력의 크기가 파괴강도를 초과하는 것으로 나타났으며, 탄소성 모델의 경우 균열의 전파 거리는 공반경의 15배인 30cm까지 균열이 확장되었다. 또한 폭 5mm 길이 20mm의 노치가 가공된 발파공의 경우 공반경의 25배인 50cm까지 균열이 진전되었으며, 균열의 방향은 노치 첨단의 방향으로 생성되는 것을 알 수 있다. 노치의 폭과 길이에 의한 영향은, 폭은 10mm이하일 경우가 적합하다고 판단되며, 길이는 균열의 성장 길이에 비례하는 경향이 있는 것을 알 수 있었다. Conditions for developing an effective controlled blast model were studied using finite element method, analyzing elastic and elasto-plastic case under static and dynamic load for normal blast hole and notched blast hole. Results show that from the elastic analysis of normal blast hole with 2 cm radius, stress concentrated by blasting exceeds tensile strength for the region up to 6 cm from hole wall and in case of elasto-plastic analysis, it was expanded up to 30 cm. For the notched blast hole with its width of 5mm and length 20mm, crack due to blasting was propagated up to 50 cm.

원관내 분류의 유동장 특성에 관한 연구 : -이유체 분사노즐을 사용한 경우-

임종한,전흥신 慶熙大學校 레이저 工學硏究所 1997 레이저공학 Vol.8 No.-

This study is intented to clarify the flow pattern in the flow developing region of an asisymmetric confined jets which has the primary stream with water jet issuing into the surrounding stream. Experiments were performed to investigate pressure variation, foundamental structure of confined jets flow and liquid flux distribution. If Ct number is less than 0.9, recirculation region be created in confined jets. Recirculation region exist in x=3R∼5R from twin-fluid injector exit. Axial pressur variation of confined jets is positive slope, the positive pressure slop increases with Ct number and constant pressure variation exist in x=14R position. The flow-field of confined jets is affected by velocity and diameter ratios of primary and secondary, and has Gauss distribution. Liquid flux distribustion is much affected by primary stream condition, but is little affected by secondary stream condition.

MATLAB을 이용한 자동차 정속주행 시뮬레이션

한창훈,김승철,박종오,박재현,임영도 東亞大學校 附設 情報通信硏究所 1997 情報通信硏究所論文誌 Vol.5 No.1

An advanced Fuzzy Controller to cruise on the longitudinal road intelligently is proposed in this paper. Typically the vehicle model is represented by velocity, due to its dynamic property and non-linearity. Linear acceleration controller described as the first Fuzzy Controller of most effective control method is applied mainly and the second one based on linguistic description for riding sensitivity is linked with the first and applied. A designed controller is evaluated under MATLAB SIMULINK simulation after it being adapted for virtual vehicle model.

Experimental Study on the Flow-field and the Atomization Characteristics of Gas-liquid Compound Jets

임종한 경원전문대학 2000 論文集 Vol.22 No.-

The study on the flow-field of gas-liquid compound jets has been presented in this paper. Compound jets is liquid and air flow in a central area and circumferential area and circumferential area, respectively. Experiments were performed to investigate spray characteristics, fundamental structure of gas-liquid two phase flow for coaxial injector with W1/W2 less than 0.6. Velocity of gas phase and flux profile of liquid flux in the main region is to be Gauss distribution regardless of distance from coaxial injector and is able to represent Eq.(2) and (3), respectively. Velocity profile of gas phase increases with a certain slope(≒4.60 in axial direction, but the slope is smaller than of a one phase gas jet(≒6)). The slope of liquid flux is much smaller(≒3.1). Dimensionless liquid flux profile decreases with a slope of 1.5. Diffusion of droplets is not affected much by high gas-liquid flow rate, but optimal gas-liquid flow rate exists for maximum diffusion.