密陽驪州李氏 亭子建築 造營活動 - 密陽驪州李氏 亭子建築의 建立背景을 中心으로 -

권순강(Kwon Soon-Kang),이호열(Lee Ho-Yeol) 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

This study is about the feature of arbor construction of Miryang Yeoju Lee's family, who resides in Miryang. Miryang Yeoju Lee moved to Miryang around 1500 and has larger number of arbors than any other families. This is probably resulted from family members' efforts. It is because that the arbors are mainly created by individuals or close descendants but later operated by the next generation who leads management and restoration. Therefore, the arbors have significant meaning within the family, too.

준설매립 점토의 자중압밀 특성에 관한 연구

이송,양태선,베열호,황규호 서울市立大學校 1993 論文集 Vol.27 No.-

연약하고 압축성이 큰 준설 점토는 액, 소성한계가 크고 불안정한 상태에 있다. 이 흙의 침하속도는 압밀계수에 의해 결정된다. 이 연약한 점토를 다루기 쉽게 만들고 안전하게 하는 것은 우리 토질기술자들이 할 일이다. 자중압밀, 침투압밀, 저응력재하 압밀실험은 표준압밀과 비교해서 비선형적인 특징을 갖는다. 우선 압밀계수가 표준압밀에서는 상수로 취급할 수있지만 저응력의 범위에서는 비선형성을 보인다. 투수계수는 저응력범위에서 비선형이 되지만 표준압밀에서는 하중이 증가할수록 상수로 수렴하는 경향이 있다. 침강에서 자중압밀로 넘어 가면서 입자가 무거운 씰트가 먼저 가라앉고 상대적으로 가벼운 점토가 나중에 가라앉아서 다층구조를 이룬다. 자중압밀, 침투압밀, 응력재하는 서로 연관성을 갖는 것을 실험결과에서 알 수 있다. Dredged soft and compressible soil with high liquid limit and plastic limit is unstable. The rate of settlement in this soil layer is characterized by a coefficient of consolidation. To make this soft clay treat easily, what we have to do makes it stable. And this consolidation has non-homogeneous characteristics compared with the standard consolidation test. First, Cv shows non-linear at the range of low stress but constant in the standard consolidation test. A coefficient of permeability becomes non-linear in the low stresses but converges constant in the standard consolidation test as loading grows. Sedimentation and self-weight consolidation leads to multi-layered soil structure. Self-weight, seepage, loading consolidations are interrelated during the test.

중·고등학생의 인터넷 중독수준에 따른 정신건강 및 학교적응의 차이

이기영 ; 최성열 ; 신성철 김천대학교 2006 김천대학교 논문집 Vol.27 No.-

Abstract This study is to find out the difference of mental health and school adaptation according to internet poisoning of junior and senior high school students, and the studyresults are as follows. First, it was found that the internet poisoning level of junior high school students is higher in all subordinate factors than that of senior high school. Second, regarding the difference of self among mental health according to inter-net poisoning level of junior and senior high school students, it was found that the higher the internet poisoning level, that is, the closer to internet poisoning stu-dents, the more problems were in emotion sell, learning self, coping self, body self. As to the difference among mental health, it was found the more the students used internet, the higher the degree of affect, neurosis, somaticization, acting, etc. Lastly, regarding the difference of social support among mental health, it was found that the lower the internet poisoning level, the more the students think that they receive more support from their families, friends and relatives. Third, in the difference of school adaptation according to internet poisoning level of junior and senior high school students, it was found that the higher the internet-poisoning level of students, the more difficult were they in adapting themselves to school life. Especially, the higher the internet poisoning level, the more difficult were they in all the subordinate factors of school adaptation. So, it was revealed that the more exposed to internet students, the more student failed in adapting to school where they stayed for the longest time, In conclusion, it was found that there was a difference in mental health and school adaptation according to internet poisoning level, and the closer to internet poisoning, the more difficulties they suffer in mental health and school adaptation. Therefore, it seems urgent to develop treatment or a prevention program for them.

재질 변화에 따른 초정밀가공기용 마이크로 스테이지의 안정성 해석

김재열,곽이구,김향우,안재신,김영석,김기태 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-

In this paper, stability of ultra precisio unit is analyzed, this unit is the kernel unit precision processing machine. According alteration of shape and material about stability investigation is performed. Through this stability investigation, trial is reduced in design and manufacture, at the time, we are accumulated foundation data for control.

FEM을 통한 UPCU의 안정성 해석

김재열,곽이구 한밭대학교 생산융합기술연구소 2004 생산기반기술연구소 논문집 Vol.4 No.1

Recently, the world is preparing for new revolution, called, IT (Information Technology), NT (Nano-Technology), and BT (Bio-Technology). NT can be applied to various fields such as semiconductor-micro technology. Ultra precision processing is required for NT in the field of mechanical engineering. Because of radical advancement of electronic and photonics industry, necessity of ultra precision processing is on the increase for the manufacture of various kernel parts. In this paper, stability of ultra precision processing machine. According to alteration of shape and material of hinge, stability investigation is performed. Hinge shapes of micro stage in UPCU (Ultra Precision Cutting Unit) are designed in two types, where, hinge shapes are composed of round and rectangularity. Elasticity and strength are analyzed on micro stage with respect to hinge shapes by FE analysis. Through this stability investigation, trials and errors are reduced in design and manufacture at the same time, and we are accumulated foundation data for a unit control.

3차원 레이저 진동측정기를 이용한 고속회전 모터의 진동특성 분석

김재열,김창현,송경석,양동조,곽이구,이창선 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-

Noise cause is dividing to fluid noise by exhaust flow of fan and vibration noise by rotational vibration of motor. Until now, measuring method has been used to measure vibration by the accelerometer, this method has been not measured for the vibration in some parts of brush and commutator because of motor construction. This research was purposed on the accurate analysis, using laser vibration analyzer, of noise cause against the difficult part in old times. By using this measured data, we would like to use for the design of silent motor.

형상인식을 적용한 용접 결함의 특징변수 추출

김재열,마상동,오성민,송경석,김양중,김창현,곽이구 朝鮮大學校 機械技術硏究所 1999 機械技術硏究 Vol.2 No.2

In this study, the researches classifying the natural flaws in welding parts are performed using the signal pattern classification method. For this purpose 500MHz storage digital oscilloscope including FFT function and enveloped waveform generator are used and the signal pattern recognition procedure is made up the digital signal processing, feature extraction, feature selection and classifier design. Specially it is composed with and discussed using the distance classifier is based in euclidean distance the empirical Bayesian classifier. In feature extracting, it is performed using the class-mean scatter criteria. And the signal Pattern classification method is applied to the signal pattern recognition problems of natural flaw that is porosity inclusion, slag inclusion, lack of penetration, lack of fusion. center crack, side crack, toe crack. root crack as the planar and volumetric flaw classification problem. According to this results, if appropriately learned the neural network classifier is better acquire the recognition rate of 86.31% above through it is different a little according to domain extracting the feature and the classifier

하수관로 연결 돌출부 절단기 유닛 개발

김재열,김영석,안재신,곽이구,송경석,이창선 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-

The issue with the drainpipe now a day is that they are laid underground. Causing us to perform additional work to repair, such as digging up the ground and peeling off the insulator that surrounds the pipe. And such series works are difficult that concession appears from government and municipal office. However, if we can save time and money. Performance of piping robot that we are studied in existing session through fixing unit and improvement of cutting byte shorten and wished to heighten work efficiency. This is why we are trying to develop a unit that can cut up the projecting parts which connects with the interior part of the drainpipes.

진공청소기 팬 모터의 진동 및 소음원인 분석을 위한 유동해석

김재열,곽이구,안재신,양동조,송경석,박기형 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.4

Recently technology resulted in highly efficient and multiple-functional electric appliances considering environmental problems. One of the environmental problems is noise of a product in respect to its function. A vacuum cleaner is an essential electric appliance in our daily lives. However, severe noise resulted from high motor speed for improving the function of the appliance is a nuisance for the user. This noise is caused by vibration from various parts of the appliance and fluid noise during a series of intake and exhaust processes while rotating the impeller connected to the axle at a high speed of the fan motor inside the vacuum cleaner rotating around 30,000-35,000rpm. Despite the fact that many researchers conducted studies on reducing the noise level of the fan motor in a vacuum cleaner, only few studies have been conducted considering both the theoretical and experimental aspects using fluid analysis by measuring vibration and noise. Moreover, there has not been a study that accurately compared major noise data obtained considering both of the aspects. In this study, both aspects were considered by considering the following experimental and theoretical methods to verify the major causes of noise from the fan motor in a vacuum cleaner.

철재 롤 코일 신소재 Dunnage 개발

곽이구,김재열 朝鮮大學校 機械技術硏究所 2006 機械技術硏究 Vol.9 No.1

Ironwork, especially steel roll coil, is usually transported to the customers over land or by sea. For fast and safe transportation of steel roll coil without damage it, it is necessary that steel roll coil is surely fixed. These days, apitong, which is fully imported from abroad, is being used to fix the steel roll coil. However, because of apitong harshness, it often damages the coil that would be hard to fix. Recovering damaged coil is almost impossible, and we have to look for a new type of dunnage, which would be able to substitute apitong. This paper discusses vanous types of reinforcement, as well as rectangular and trapezoid dunnages. We will consider how rolling occurs and what happens when the carrier starts and stops moving. Thus, it will be possible to design a dunnage, which would not damage ironwork and had better recovery and softness than the existing apitong.