• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회
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• pp.539-545
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• 2010

The field plate test has a good potential for determining since it measures both plate pressure and settlement. The deformation modulus of rock mass is differently measured for status of structures. The values of deformation modulus are obtained from laboratory test (uniaxial and triaxial test) and field test (pressuremeter test). Plate load test should be conducted by different loading plate sizes for geological structure of rock mass and scale of structures. In this paper, large plate load tests were performed to predict of structure's behavior and evaluate the ultimate bearing capacity of the foundation on soft rock. Simultaneously, deformation modulus of rock mass was estimated by back analysis of stresses measured in field test under rock mass. Finally, we verified the validation of deformation modulus of rock mass through result of large plate load test and numerical simulation.

• 한국전기전자재료학회논문지
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• 제30권9호
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• pp.566-571
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• 2017

A soft baking process was used to enhance the electrical characteristics of solution-processed indium-zincoxide (IZO) thin-film transistors (TFTs). We demonstrate a stable soft baking process using a hot plate in air to maintain the electrical stability and improve the electrical performance of IZO TFTs. These oxide transistors exhibited good electrical performance; a field-effect mobility of $7.9cm^2/Vs$, threshold voltage of 1.4 V, sub-threshold slope of 0.5 V/dec, and a current on/off ratio of $2.9{\times}10^7$ were measured. To investigate the static response of our solutionprocessed IZO TFTs, simple resistor load type inverters were fabricated by connecting a resistor (5 or $10M{\Omega}$). Our IZO TFTs, which were manufactured using the soft baking process at a baking temperature of $120^{\circ}C$, performed well at the operating voltage, and are therefore a good candidate for use in advanced logic circuits and transparent display backplanes.

• Journal of Welding and Joining
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• 제8권3호
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• pp.79-88
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• 1990

Welded joint often contains soft or softened regions such as the HAZ of TMCP steel welded with high heat input. In this study, the equivalent yield strength of plate structure containing softened region was predicted by FEM analysis, and its incremental behavior was explained with the results of the analysis. The calculated results of yield strength indicated the following for the plate structures. 1) As the softened region starts to yield, shear stress begins to build up along the boundary between base metal and softened region. This results in multi-axial stress condition which gives restraint on the softened region. 2) Restraint effect has a significant influence on the distribution of the shear stress, the nominal stress, and the strain. 3) The yielding behavior of softened region becomes the same as that of base metal when both ratios of length to width and thickness to width of softened region are larger than 30 and 13 respectively.

• 한국멀티미디어학회논문지
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• 제11권12호
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• pp.1649-1657
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• 2008

In this paper, to overcome the failure of binarization for the characters suffered from low contrast and non-uniform illumination in license plate character recognition system, we improved the binarization method by combining local thresholding with global thresholding and edge detection. Firstly, apply the local thresholding method to locate the characters in the license plate image and then get the threshold value for the character based on edge detector. This method solves the problem of local low contrast and non-uniform illumination. Finally, back-propagation Neural Network is selected as a powerful tool to perform the recognition process. The results of the experiments i1lustrate that the proposed binarization method works well and the selected classifier saves the processing time. Besides, the character recognition system performed better recognition accuracy 95.7%, and the recognition speed is controlled within 0.3 seconds.

• 미생물학회지
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• 제27권3호
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• pp.279-284
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• 1989

부산시내 주택단지의 하수나 토양에서 LAS 분해능이 우수한 균주를 유일한 탄소원으로서 sodium dodecylbenzenesulfonate(SOBS, soft type)를 포함하는 agar plate를 사용하여 분리히였다 이들 분리균중 2균주가. SOBS를 0.1% 함유한 완전배지에서 30$^{\circ}$C 24시간 배양했을 때' SOBS분해율이 최고 59% 정도까지 냐타내였다 긍속이온에 대한 이들 분리 균의 내성조사결과 대부분 $CdCl^{2}$,와 $ZnCl^{2}$에 비교적 내성이 큰 것으로 나타났으며 분리균의 항생제 내성시험에서는 ampicillin 에 대하여 내성을 나타내었다. 특히 분리균중 1개는 ampicillin에 대해 1,550mg/ml 이상에서도 내성을 나타내었으며 이 분리균주는 Klebsiella 속으로 동정되었다. 이 균주는 5kb와 4kb의 2개의 plasmid를 가지고 있었으며 이들은 E. coli C600 plasmic 균주에 형질전환시켰을 때 SDBS분해능을 나타내었으므로 SDBS분해능은 plasmid에 존재하는 유전인자에 의한 것임을 알 수 있었다.

• 전산구조공학
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• 제9권3호
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• pp.199-207
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• 1996

원통관에 휨모멘트가 작용하면 변형후 단면은 타원형상을 갖게된다. 단면의 타원화에 의해 단면이 감소하게 되면 휨강성이 감소하게 되며, 따라서, 휨모멘트-곡률관계가 하중점감형으로 된다. 이 휨강성의 감소현상을 Brazier이론 또는 Brazier현상이라고 한다. 적층평판에 있어서도 각층의 재료상수가 뚜렷하게 다른 경우 원통관에서의 Brazier현상과 유사한 현상이 발생한다. 본 논문에서는 평판에서의 Brazier현상을 규명하기 위하여 3층 적층모델을 만들어 각층의 재료정수가 현저히 다른 경우 어떠한 현상이 일어나는 가를 실험적으로 규명하였고, 이론해석을 위하여 스프링모델을 사용하였다. 본 논문의 모델에서 알 수 있듯이 중간층의 재료상수가 상하층 요소의 재료상수 보다 뚜렷하게 작은 경우 중간층의 거동이 현저히 크게됨을 알 수 있었다. 즉, 본 논문에서 채택한 모델의 경우에 있어서도 원통관에서 일어나는 Brazier형상이 일어나고 있음이 실험적 그리고 해석적으로 규명되었다 .

• 대한족부족관절학회지
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• 제17권3호
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• pp.174-181
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• 2013

Distal tibia fractures were mainly caused by high energy trauma and the lower legs were enveloped in poor soft tissue. Therefore, there are many open fractures and concomitant soft tissue injuries in distal tibia fractures. For the restoration of ankle function, the surgical treatment was performed in distal tibia fractures. However, it is difficult to treat the distal tibia fracture surgically. There are many complications in distal tibia fracture due to highly comminuted fracture and poor soft tissue condition. There are many surgical methods for distal tibia fractures, such as, external fixator, intramedulary nailling, open reduction & internal fixation, and minimally invasive plate osteosynthesis. We reviewed the surgical treatments of distal tibia fractures.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2001년도 추계학술대회 논문집
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• pp.534-539
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• 2001

This paper presents the critical speed analysis of geogrid-reinforced rail roadbeds on soft soil. A rail roadbed on soft ground must be designed to avoid intolerable stress in the underlying soil and to give sufficient support for the rail system. At high speeds, the deformation of rail systems will gain dynamic amplification, and reach excessive values as a certain speed, here termed critical speed is approached. The elastic Winkler foundation model was used to predict the critical speed of geogrid-reinforced rail roadbeds on soft soil and the model properties were determined by the in-situ cyclic plate load test. Based on the parametric study of elastic beam on Winkler foundation model, the critical speed increase with the increase of the flexural risidity of subgrade EI and the stiffness coefficient of Winkler foundation k. From the in-situ cyclic load tests and analysis of elastic beam on Winkler foundation model, the critical speed increase with increase in number of reinforced layer and non-dimensional value for depth of first geogrid layers and the thickness of reinforced rail roadbed u/d.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 춘계학술대회 논문집
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• pp.325-328
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• 2008

This paper presents a new conceptual electromagnetic induction eddy current-based stainless steel plate spiral type heater for heat exchanger or dual packs Heater in hot water system boiler steamer and super heated steamer, which is more suitable and acceptable for new generation consumer power applications. In addition, an active clamped quasi resonant PWM high frequency inverter using trench gate IGBTs power module can operate under a principle of zero voltage soft commutation with PWM is developed and demonstrated fora high efficient induction heated hot water system and boiler in the consumer power applications This consumer induction heater power appliance using active clamp soft switching PWM high-frequency inverter is evaluated and discussed on the basis of the simulation and experimental results.

• 도시과학
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• 제9권2호
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• pp.51-56
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• 2020

The installation of soft ground instruments and the performance of measurement and management of the measurement shall be carried out in order to ensure the safety of the construction work and to improve the quality of the construction work. The purpose of the pressure density deposition calculation is to determine the stability of the foundation ground and the formulation by measuring and calculating the density conditions generated on the soil through the period of neglect after completion of the soil at each stage. In practice, it is judged that the analysis by the hyperbolic method can be applied to the safety side.