한국의 낙농시설 개선에 관한 연구

김문기,고재군,김현욱,Kim, Moon-Ki,Koh, Chae-Koon,Kim, H. U. 한국농공학회 1982 한국농공학회논문집 Vol.24 No.1

Engineering phase of dairy housing systems has close connection with the milk produc- tivity of dairy cattle, the quality of milk, extension of dairy production systems, labor- saving in management of dairy cattle and the like. Moreover, the rate of investment of dairy housing facilities is of relatively high level, However, there has been almost no research effort for the improvement of engineering aspects of dairy housing systems in Korea. The purpose of this study is to find out general engineering problems and to recomm- end the improvement in dairy housing systems in Korea. Field survey by means of questionaire, direct measurements, taking pictures and sketching was conducted to get necessary information for the study. Kyung-ki Do region was firstly chosen for sampling area since it has included more than half of the number of dairy farms of the whole country. The results obtained are summarized as follows: 1. In overall dairy farm layout, the dwellings of workers were ignored in the light of sanitary environment 2. The layout of stalls in a dairy barn belongs mostly to the type of double-row face-out, which is compatible with the emphasis of manure disposal activities. 3. While the width and length of stalls were sufficiently close to the standard dimension, the width of mangers was much less than the standard dimension. 4. The width and depth of manure gutters and the width of working alleys were much. less than the standard dimension. 5. The mooring equipment was mostly in the classes of chain or rope. The watering equipment was not facilitated independantly except the one cese of using watercup. 6. The bucket milkers with one or two bucket milkers with the capacity of two cattles. each were used as milking equipment in most dairy farms. 7. There were only few milk rooms independently spaced from other space, in which the arrangement of milking equipment was much less than the standard condition. 8. The lounging ground area was averaged to be sufficient for the activity of dairy herd. 9. Silos for silage used during winter consisted of mostly bunker silos, trench silos and underground vertical silos. Ordinary vertical silos were considered for the farmers to be inconvenient for the labor saving. 10. From the view point of heat conservation and moisture removal within the dairy barns, windows were not flexible for the easy ventilation and ceiling part was not adequate for temperatur maintenance. 11. Waste treatment and disposal systems were not provided with most dairy farms, therefore the livestock waste pollution problems would be serious in the near future.

몬테카를로 모사를 이용한 동압력 교정기 불확도 평가

김문기,Kim, Moon-Ki 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.4

This paper describes Monte Carlo Simulation(MCS) to assess the uncertainty of dynamic pressure calibrator and the expanded uncertainty results that were compared by GUM approximation and MCS. MCS uncertainties were computed using defining a domain of possible inputs, generating inputs randomly using probability distribution, performing a deterministic computation repeatedly and aggregating the results. It was revealed that the expanded uncertainty between GUM and MCS was different from each other. the expanded uncertainties were 0.5366%, 0.4856%, respectively. MCS is a suitable method for determining the uncertainty of simple and complex measurement systems. It should be more widely used and studied in measurement uncertainty calculations.

유한요소법(有限要素法)에 의(依)한 Telescope Denture의 지대치(支臺齒) 및 지지조직(支持組織)의 역학적(力學的) 반응(反應)에 관(關)한 연구(硏究)

김문기,최부병,Kim, Moon-Ki,Choi, Boo-Byung 대한치과보철학회 1984 대한치과보철학회지 Vol.22 No.1

The purpose of this study was to analyze the magnitude and mode of the stress distribution induced in the supporting alveolar bone and periodontal ligament and, to determine the displacement of abutment teeth and telescope denture base by applying chewing force to the telescope denture quantitatively and qualitatively. Two finite element models of telescope denture that were restored the missing mandibular second molar with two abutment teeth which were constructed. In two different models, parallel and tapering type telescope crowns were constructed. These finite element models of two cases used for these experiment were a two-dimensional mesiodistal section of the mandibular second bicuspid and first molar. Chewing force of 25Kg that was devided in the ratio of 45/155 (29%) in bicuspid and 55/155 (35.5%) in molars was applied to telescope denture and abutment teeth respectively. The displacement of the telescope denture base and abutment teeth and the stress distribution in the periodontal ligament and alveolar bone were analized to investigate the influence of chewing force acting on the telescope denture and abutment teeth. The results were as follows: 1. Abutment teeth displaced mesially and the magnitude of displacement of abutment teeth in vertical direction were more than that of horizontal direction in two cases. The displacement of abutment teeth on the telescope denture treated with tapering type telescope crown were less than that of the parallel type crown. 2. The displacement of the telescope denture base that were treated with parallel type telescope crown were less than that of treated with tapering type telescope crown. 3. The stress induced in the alveolar bone and periodontal ligament on abutment teeth that treated with parallel type telescope crown were more than that of treated with tapering type telescope crown and more stress induced in the alveolar bone than in the periodontal ligament. 4. In the telescope denture, the magnitude of displacement of abutment teeth and stress induced in the periodontal ligament and alveolar bone were within physiologic limit.

實驗的 佝僂病 白鼠의 象牙質 石灰化에 關한 硏究

金文起(Moon Ki Kim) 대한치과의사협회 1985 대한치과의사협회지 Vol.23 No.6

도심지역 내 중·소하천 수질 개선을 위한 가압부상 및 관로형 미생물 부착 공정 적용에 관한 연구

김문기(Moon Ki Kim),최정수(Jung Su Choi),김삼주(Sam Ju Kim),김현구(Hyun Gu Kim) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.7

본 연구의 목적은 도심지역 중소하천의 효율적인 수질정화를 위해 물리화학적, 생물학적 처리공정을 결합한 장치형하천수질정화공법의 적용성을 평가하는데 있다. 본 연구의 하천정화시설은 TSS 및 TP 제거를 위한 가압부상(Micro Bubble Process, MBP)공정과, BOD 제거를 위한 관로형 미생물 부착(Attached Microbial Pipe System, AMPS)공정으로 구성하였다. 각장치의 실험 조건은 MBP 공정의 부상조 체류시간 및 초미세기포 주입량 변화와 AMPS 공정의 체류시간의 변화를 설정하였다. 또한 계절 변화에 따른 각 공정의 오염원 제거효율을 평가하였다. 각 공정의 연속운전 결과 MBP 공정에서는 최대 TSS 83.69%, TP 95.15%의 처리효율을 나타냈으며, AMPS 공정의 TBOD5 제거효율은 최대 53.0%를 나타냈다. 또한 각 공정의 순환운전 결과 MBP 공정에 의해 최대 TSS 69.75%, TP 70.17%의 처리효율을 나타냈으며, AMPS 공정에 의해 TBOD5 제거효율은 최대 68.58%를 나타냈다. 따라서 본 하천정화시설은 도심지역 내 오염된 하천의 수질을 개선하는데 효과적이라고 사료된다. The purpose of this study is to assess the applicability of device-type stream coagulation process which combines physiochemical, biological processing for efficient improvement of water quality in small, middle-sized urban streams. The stream purification facility of this study is compose of pressure flotation type Micro Bubble Process(MBP) to remove TSS and TP and conduit line type Attached Microbial Pipe System(AMPS) to remove BOD. Test conditions of each device were set by floating stay time and change of ultra fine bubble injection amount of MBP, and change of AMPS stay time. Also, removal efficiency of pollution sources of each process were assess by change of season. As result of continuous operation of each process, MBP showed a maximum of TSS 83.69%, TP 95.15% process efficiency and AMPS showed a maximum of 52.95% TBOD5 removal efficiency. Also as result of circular operation of each process, MBP showed a maximum of TSS 69.75%, TP 70.17% process efficiency and AMPS showed a maximum of 68.58% TBOD5 removal efficiency. Therefore, it is considered that this stream coagulation process is effective in improving the water quality of streams in urban areas.

실제 선로조건에서의 레일 경좌에 변화에 따른 철도차량의 주행안전성 해석

김문기(Moon Ki Kim),엄범규(Beom Gyu Eom),이승일(Seung Il Lee),이희성(Hi Sung Lee) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.6

교육매체 활용 : 지식기반 시스템을 이용한 CNC 가공교육

김문기 ( Moon Ki Kim ),이장묵 ( Jang Mook Lee ) 한국실천공학교육학회 2010 실천공학교육논문지 Vol.2 No.1

소타액선에 발생한 Oxyphilic adenona

김문기(Moon Ki Kim),조재오(Jae O Cho) 조선대학교 구강생물학연구소 1984 Oral Biology Research (Oral Biol Res) Vol.7 No.-

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생검례의 통계학적 고찰 ( 치과 )

김문기(Moon Ki Kim),조재오(Jae O Cho),조영필(Young Pill Cho) 조선대학교 구강생물학연구소 1983 Oral Biology Research (Oral Biol Res) Vol.6 No.-

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구조용(構造用) 샌드위치 판(板)의 휨특성(特性)에 대(對)하여

김문기 ( Moon Ki Kim ) 한국농공학회 1974 韓國農工學會誌 : 전원과 자원 Vol.16 No.4

구조용 샌드위치판이라는 것은 두꺼운 경량재료를 가운데 두고 그 양면에 얇은 표면재료를 부착시켜서 만든 구조재료의 일종이다. 이와 같은 일종의 합성재의 개념은 서로 다른 성질의 재료를 부착제에 의하여 조합시킴으로써 각각의 재료가 독립적으로는 발휘하지 못하는 휨에 대한 저항 기능을 발휘할 수 있도록 하는 것이다. 이 연구의 목적은 구조용 샌드위치판의 휨특성을 결정함에 있어서 이론적인 계산과 실험적인 방법을 비교하고자 하는 것인데 그 결과는 다음과 같다. 1. 샌드위치 판의 중앙점의 휨량은 해석적으로 유도한 공식에 의하여 근사적으로 계산할 수 있다. 이때 탄성 상수들이 주어져야 한다. 2. 부착제의 질을 개량하므로써 전체적인 휨 剛度 및 휨 强度를 증가시킬 수 있다. 3. 샌드위치판의 최대 휨량과 웅력을 계산하는 가장 간단화 된 공식은 본 실험에 사용된 치수의 범위에서는 실제 목적에 사용될 수 있다. 4. 두 가지 다른 재하 방법에 의한 두가지 다른 공식에 실험 데이타를 넣어서 이원 연립방정식을 풀어서 휨 剛度 D와 내부재료의 전단 탄성계수 Gc를 계산하는 문제는 시험 데이타의 변화 때문에 실현화 될 수는 없었다. 5. 부착면에서 생기는 미끄러짐과 수평전단 웅력과의 관계를 결정하기 위해서는 앞으로의 시험이 필요할 것이다. 이 미끄러짐 현상을 감안하여 D와 Gc를 결정하기 위해서는 부착면이 완전 剛이라는 가정을 하지 안는 다른 공식을 사용해야 할 것이다. 6. 이 연구에 제시된 데이터는 시험에 사용된 샌드위치판들의 상대적인 剛度와 强度를 제시하고 안전측으로 사용한다면 설계 목적에 어떤 지침이 되리라고 생각한다.