사질토지반의 테이퍼-펄스말뚝 적용에 관한 실험적 연구

김종인,신영기,김태형,오재학 대구대학교 산업기술연구소 2009 産業技術硏究 Vol.20 No.1

In this paper, a typical drilled shaft to cylindrical and step-tapered pile, pulse pile are produced by the experiment and then captured the ground, forming Jumunjin standard sand model tests loading at sat joy bearing capacity analysis, tapered plus pulse pile was suggestions. Soft ground and the ground around the sandy soil casting of pile to skin friction research tapered pile adjusting the angle and shape for a wide range of variation of pulse pile further study is underway, and the most graft-type model is not presented. Therefore, in this study, the test bearing capacity of existing drilled shaft current analysis by the comparative analysis, as well as skin friction through mutual tapered plus pulse pile bering capacity and allow the unit to analyze and compare the suggestions model would be effective.

전자토모그래피의 정량적 분석에서 대물렌즈 조리개의 영향

김진규,이상희,권희석,정종만,정원구,이수정,주형태,김윤중 韓國電子顯微鏡學會 2008 Applied microscopy Vol.38 No.4

Electron tomography의 정량적 분석을 위해서 대물렌즈 조리개가 투과빔의 강도에 미치는 영향을 평가하였다. Electron tomography에 도입되는 Beer’s law의 올바른 적용을 위해서는 투과빔은 시료의 기울기에 따른 mass thickness의 변화에 의한 효과만을 반영해야 한다. 그러므로 빔 경로상의 대물렌즈 조리개, 홀더 등에 의한 다른 효과는 제거되어야 한다. 본 연구에서는 대물렌즈 조리개의 cut-off 효과를 120 kV TEM과 Quantifoil holey 카본 시료를 이용하여 상세히 평가하였다. 대물렌즈 조리개를 사용하지 않은 경우와 비교할 때, 30 μm 크기의 대물렌즈 조리개를 통과한 투과전자빔의 강도는 약 16.7%의 감소가 일어난다. 또한 55˚이상의 고경사각 기울기에서는 대물렌즈 조리개의 cut-off 효과에 의해 14.2%의 강도 감소가 추가적으로 발생함을 알 수 있었다. Electron tomography에서 정량적 분석을 위해서는 이러한 대물렌즈 조리개의 영향을 고려해야만 한다. 또한 Beer’s law의 올바른 적용을 위해서는 일련의 기울기에 따른 2차원적 영상은 가능하면 대물렌즈 조리개를 사용하지 않은 상태에서 획득하는 것이 바람직하다. We have evaluated the effects of experimental factors on transmitted electron beam intensities for quantitative analysis in electron tomography. For the correct application of Beer’s law in electron tomography, the transmitted beam intensity should reflect the net effect of mass properties on beam path. So, the any other effects of the objective aperture and the specimen holder on beam path should be removed. The cut-off effects of objective aperture were examined using Quantifoil holey carbon film and a transmission electron microscope operated at 120 kV. The transmitted beam intensities with 30 μm objective aperture dropped about 16.7% compared to electron beam intensities without the objective aperture. Also, the additional losses of about 14.2% at high tilt angles were occurred by cut-off effects of the objective apertures. For the precise quantitative analysis in electron tomography, the effect of the objective aperture on transmitted electron beam intensities should be considered. It is desirable that 2-D tilt series images are obtained without the objective aperture for correct application of Bee’s law.

PGA에 대한 면진받침의 손상도 해석 연구

김종인,김종윤,김태형 대구대학교 산업기술연구소 2009 産業技術硏究 Vol.20 No.1

Nowadays, The number of occurrence of earthquakes has increased and accordingly the damage caused by earthquake has also increased around the world. Because it is difficult for earthquakes to be predicted in advance and earthquakes often occur concurrently, the needs for the study on the effects of earthquake was increased. Probability theory accumulated during a long time enables engineers to deal with uncertainties of structure quantitatively and to judge stability of structure reasonably. Existing method calculates uncertainties by applying safety factors but the method cannot consider the safety of structures quantitatively. When various stages of structural damage are considered, if the number of uncertainties are many, then a method is needed for assessing vulnerability and damage state appropriately. This study aims not only to present the way for finding fragility curve of structures by using universal structural analysis program and general probability density function but also to compare seismic isolation performance.

외상성 손상과 관련된 상악 측절치 치근형성의 부분 또는 완전정지에 관한 증례보고

김도형,서태휴,이상호 大韓小兒齒科學會 1995 大韓小兒齒科學會誌 Vol.22 No.2

Partial or complete arrest of root formation is a rare complication caused by different factors that affects the permanent tooth during root development. The possible factors affecting this complication have been reported in dentin dysplasia, trauma, transmission of the periapical infection of the primary teeth to permanent tooth germ, radiation therapy, and congenital renal disease. One of these factors, traumatic injury to the primary dentition may cause a deflection or displacement of the permanent tooth bud. And the effects of trauma to Hertwig's epithelial root sheath which is essential to root development are the result of the transmission of the traumatic force through the surrounding bone or through the primary tooth. And it can cause critical damage to the normal root development. These tow cases show 2 children who complained of delayed eruption of permanent incisors, who have had a traumatic history during primary dentition. After clincial examination, because they have no more evidence of root formation of maxially lateral incisors. We extracted the permanent maxially lateral incisors which show partial or complete arrest of root formation. We concluded as follows; 1. These two cases show that one is a complete arrest of root formation when injured at 3 years old, the other is a partial arrest of root formation when injured at 5 years old. So, it is considered that direction and magnitude of traumatic forces and injured stage of permanent tooth bud will affect the root development. 2. It was noticed that there was an arrest or loss of Hertwig's epithelial root sheath in the histologic section of the extracted maxially lat. incisors. 3. After continuous observation, if there is a sign of partial or complete arrest of the root formation, impaction, or delay of the eruption of surrounding teeth after the normal root formation stage, extraction is indicated, and it is considered that orthodontic or prosthodontic treatment is needed.

Dickinson의 Death Poems

金亨泰 韓社大學 1980 대학논문집 Vol.10 No.-

Emily Dickinson contemplates or 'observes' death and immortality in so many ways. But in general her death-immortality poems can be grouped into two. One is the type that the observer herself plays the role of a dying person, the other is the one that she watches process of other people's death. Dickinson is so faithful to her own soul that she even tries to examine death as if she herself were dying. It seems to her that Death approaches like a lover with some evil contrivance or like an emperor with a majestic air, or stings like a bee, visits like a friend, kills mercilessly like an assassin, makes a surprise attack like a snake, or so forth. The effects death has on a human body are stony coldness, dead silence, and fearful numbness. Death in Dickinson's poems, however, means soul's entrance to a timeless dimension which she leaves in mystery. The port's agony lingers between Death's two contrastive effects-the body's sufferings and decay, and the soul's rest and immortality. And one of the strongest point of Dickinson as a poet is that she most fruitfully uses very simple and familiar images in our everyday life even when she deals with the very heavy subject death.

아파트단지내 조경시설물 평가에 관한 연구 : 수원 매탄5단지를 사례로 A Case Study of Maetan Apartment Complex in Suwon, Korea

김학범,김정태,임형준 안성산업대학교 2002 論文集 Vol.34 No.-

This study aims to provide useful data for designing the outdoor space or planning landscape architecture facilities in apartment housing complex. Primary data were collected by questionnaire survey in Maetan Apartment Complex in Suwon. The questionnaires contain three sets of variables : outdoor environment, landscape architecture facilities, and the respondents' demographic variables. The results are as follows. 1) The apartment residents are using bench or pergola most frequently among the landscape architecture related facilities. 2) The residents are dissatisfied with shortage of parking lots, therefore, more parking area is needed in the apartment complex. 3) The residents expressed considerable concern for trees, however, they pointed out to change some species of trees and need some professional management for them. 4) The variables related landscape architecture facilities were reduced to 6 factors; 'trees', 'bench/pergola', 'excercise/playground', 'pavement', 'lighting facility', 'parking lots'. And 'trees' is perceived the most important factor by the residents. 5) Finally, 'landscape architecture facilities', is most important factor among variables consist of apartment exterior environment.

인터넷 중독이 중학생의 건강수준에 미치는 영향

김형태,양점홍 釜山大學校 附設 體育科學硏究所 2005 體育科學硏究所 論文集 Vol.21 No.1

A total of 812 middle school students, including 273 first-year students(male:156, female:117), 260 second-year students(male:138, female:122), and 279 third-year students(male:139, female:140) from U Middle School in Busan Metropolitan City, were placed into an Internet addiction group and a non-Internet addiction group based on the Young's Internet Addiction Questionnaire. A random sample of 30 students was taken in each group from each grade level and gender. In total, 360 students are the objects of this study.......

6kW 독립형 풍력발전기의 진동 모니터링 및 분석

김석현,남윤수,유능수,이정완,박무열,박해균,김태형 江原大學校 産業技術硏究所 2005 産業技術硏究 Vol.25 No.A

A vibration monitoring system for a small class of wind turbine (W/T) is established and operated. The monitoring system consists of monolithic integrated chip accelerometer for vibration monitoring, anemometers for wind data acquisition and auxiliary sensors for atmospheric data. Using the monitoring system, vibration response of a 6kW W/T generator is investigated. Acceleration data of the W/T tower under various operation condition is acquired in real time using LabVIEW and is remotely transferred from the test site to the laboratory in school by internet. Vibration state of the tower structure is diagnosed within the operating speed range. Resonance frequency range of the test model is investigated with the wind speed data of the test site.

임신 종결 후 발생한 자궁 동정맥 누공에서 자궁동맥색전술로 치료한 1예

김종민,이해혁,김태희,남계현,심일구,이권해,김형문,이임순,장종호 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Arteriovenous fistula of uterus is rarely reported disease. This vascular malformation is very dangerous condition because Dilatation & curettage can cause massive uterine bleeding without accurate diagnosis. The diagnosis is made by angiography, gray scale ultrasonography, color and duplex doppler ultrasonography, computed tomography, and magnetic resonance imaging is helpful. Especially color and duplex doppler ultrasonography is allows convincing detection and diagnosis of arteriovenous fistula. Recently transcatheter uterine artery embolization is treatment of choice. We have experienced a case of arteriovenous fistula of uterus. Which is presented with a brief review of literature.

生物學的 改良劑를 利用한 슬럿지의 脫水

김형석,신남철,이태호,박승조 동아대학교 환경문제연구소 1991 硏究報告 Vol.14 No.2

To conditioning sludge to occure in the course of food processing industry, after culturing Rhoodotorula glutinis, dosing a certain amount of culture solution into the sludge and measured the variation of total suspended solids and then, in the aerobic and anaerobic conditions after manage sludge, examining the result of measured specific resitance, the coefficient of cmopressibility to know the dewateability. Arrangements of this result are as follows : 1) As the result of total suspended solids concentration by change of aeration time and the amount of Rhodotorula glutinis dose, optimal dose was Rhodotorula glutinis 10㎖ by 20㎖ sludge. The very suitable aeration time was 4-5days. 2) After dosing biological conditioner(Rhodotorula glutinis) 60㎖ by 11 sludge in aerobic condition, aeration for five days. The results of specific resistance, the coefficient of compressibility were 22.71×10^(5)m/㎏ 1.6, respectively. 3) In the cases of using Rhodotoruls glutinis for biological conditioner, using polymer for chemical conditioner. This results are as follows : Biological conditioner ; the moisture content of sludge cake 77.7% Chemical conditioner ; the moisture content of sludge cake 70.3% But, I author propose that biological conditioner is more useful than chemicals in the total operating and maintenance cost.