• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 추계종합학술대회
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• pp.1103-1106
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• 2005

본 연구의 목적은 카메라를 통하여 획득한 이미지 정보를 캡쳐 후, 이를 분석하여 물체의 동작을 인식하는 Vision Box를 설계하는데 목적이 있다. 본 연구는 고객 즉, 사용자의 요구조건을 최대한 반영하여 구현하고자 하였다. 구현하고자 하는 Vision Box 시스템은 특별한 외부의 부가적인 센서를 사용하지 않고 카메라를 통하여 들어오는 화상 정보만을 분석하여 물체를 식별할 수 있도록 하였다. 그리고 PLC와의 통신과 원격지에서 Vision Box를 제어할 수 있는 방법도 지원할 수 있도록 하였다. 본 연구에서 제안한 Vision Box의 성능을 자동차 엔진패턴 검사를 통하여 검증할 수 있었으며 제안한 Vision Box 시스템이 다양한 산업분야에 적용될 수 있을 것이라 생각된다.

• 한국포장학회지
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• 제6권1호
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• pp.47-52
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• 2000

개발한 EPS 포장상자가 사과의 신선도 유지효과 기능이 있는지의 여부를 조사코자 사과를 포장하여 $20^{\circ}C$ 저장하면서 골판지상자와 0.02와 0.04mm 두께의 LDPE 필름, 기능성 MA필름과 50배로 발포시킨 EPS상자에 사과를 15kg씩 포장하여 포장재간의 신선도 유지효과를 비교하였다. 저장 40일 후 중량감소는 대조구는 5.7%, EPS 상자는 0.5%의 중량감소가 나타났고, 비타민C도 2.06과 2.31 mg%로 EPS 포장구가 높게 유지되고 있었다. 당도와 산도는 포장구간에 큰 차이가 없었으며 부패의 경우 대조구는 상자당 3-5개과가 발생했으나 EPS포장구는 발생하지 않았으며 외관도 양호한 것으로 나타났다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 봄 학술발표회 논문집
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• pp.731-736
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• 2001

In this thesis, the study on controlling of cracks of concrete box culvert in early ages is presented. The optimum construction method and economical analysis were proposed also through the experiment of the material and field test. As a result of the experiment of the material, using fly ash, CSA expansive agent and BELITE cement(type IV) showed good result in the control of cracks induced by heat of hydration and shrinkage. As a result of construction test analysis, the maintenance time of form system did not show a big difference in controlling of cracks. Control of distribution of reinforcement, spacing of expansion joint and use of BELITE cement showed big differences in the control of cracks in early ages. As a result of economical analysis, control of construction variables before construction can make it possible to reduce the repair expense.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.1334-1338
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• 2005

A limit switch box is used for an indicator of a valve actuator. This device indicates an opening and closing of a valve or a throttle in the valve actuator. In a ship, equipments require safety and robustness because of a rough environment and a specific condition during a voyage. However, the limit switch box has been used in an indoor environment generally. This study developed a new limit switch box which can be used at an outdoor environment. This study designed the new limit switch box. The housing of the limit switch box was made by an aluminum die cast method with surface painting after anodizing or chromate coating. In order to evaluate the endurance of the housing, the endurance tests against salt water have been conducted. Experiment results showed that the proposed device provides a reliable performance against salt water.

• Journal of the Korean Statistical Society
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• 제34권3호
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• pp.173-183
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• 2005

The Box-Cox power transformation is generally used for variance stabilization. Recently, Shin and Kang (2001) showed, under the Box-Cox transformation, invariant properties to the original model under the large mean and relatively small variance assumptions in time series analysis. In this paper we obtain some invariant properties in spatial statistics. Spatial statistics, Invariant Property, Variogram, Box-Cox power Transformation.

• 한국마이크로전자및패키징학회:학술대회논문집
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• 한국마이크로전자및패키징학회 2002년도 International Symposium
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• pp.33-49
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• 2002

$\Box$ LTCC/LTCC-M technologies are a cost-effective SOP technology $\Box$ LTCC/LTCC-M materials have good RF characteristics and the materials can be used as excellent substrates for high band width applications $\Box$ Reliability of LTCC/LTCC-M package or module can be greatly improved by embedded passive technology and CTE control of the substrates $\Box$ To expand the application area, more development is needed in realization of embedded passives with tight tolerance

• Geomechanics and Engineering
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• 제9권5호
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• pp.619-629
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• 2015

Influenced by various mining activities, fractures in rock masses have different densities, set numbers and lengths, which induce different mechanical properties and failure modes of rock masses. Therefore, precisely expressing the failure criterion of the fractured rock influenced by coal mining is significant for the support design, safety assessment and disaster prevention of underground mining engineering subjected to multiple mining activities. By adopting PFC2D particle flow simulation software, this study investigated the propagation and fractal evolution laws of the micro cracks occurring in two typical kinds of rocks under uniaxial compressive condition. Furthermore, it calculated compressive strengths of the rocks with different confining pressures and box-counting dimensions. Moreover, the quantitative relation between the box-counting dimension of the rocks and the empirical parameters m and s in Hoek-Brown strength criterion was established. Results showed that with the increase of the strain, the box-counting dimension of the rocks first increased slowly at the beginning and then exhibited an exponential increase approximately. In the case of small strains of same value, the box-counting dimensions of hard rocks were smaller than those of weak rocks, while the former increased rapidly and were larger than the latter under large strain. The results also presented that there was a negative correlation between the parameters m and s in Hoek-Brown strength criterion and the box-counting dimension of the rocks suffering from variable mining activities. In other words, as the box-counting dimensions increased, the parameters m and s decreased linearly, and their relationship could be described using first order polynomial function.

• 한국식품영양과학회지
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• 제29권2호
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• pp.248-251
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• 2000

To investigate the effects of packaging films (functional MA films/FC30, FC50, MA film/0.03 mm LDPE, corrugated paperboard box/control) weight loss, firmness, total ascorbic acid, chlorophill and overall appearence were evaluated. Weight loss of cucumbers packed with FC30 and FC50 at 2$0^{\circ}C$ after 7 days were 1.0 and 0.6%, that of the control was 2.9%, those of LDPE was 0.5%. The firmness of FC30 and FC50 at 2 $0^{\circ}C$ after 7 days were 1.0 and 0.6%, that of the control was 2.9%, those of LDPE was 0.5%. The firmness of FC30-, FC50 and LD was higher than that of the control. Total ascorbic acid contents (TAA) of cucumbers packed with control, LD, FC30 and FC50 box were 9.96, 10.86, 11.37 and 11.29 mg% after 7 days. TAA of FC box was 10% higher than that of the control. Chlorophill content of FC boxes wase 16% higher than of the control. Overall appearence of cucumber packed with FC boxes was better than that of the control.

• 한국컴퓨터정보학회논문지
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• 제6권2호
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• pp.90-96
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• 2001

네트워크의 발전은 통신망의 발전과 더불어 심각한 사회문제를 발생시킨다. 즉, 보안에 관련된 문제는 네트워크를 사용할 경우 해킹과 크래킹에 대하여 더욱 주의해야 한다는 것이다. 본 논문에서는 키분배 및 키길이에 관한 결정론적 문제점에 무관하게 암호화를 수행할 수 있는 다중 비선형 S-box 함수(Multiple nonlinear S-box function)를 사용하는 블록 암호시스템을 제안하고 하드웨어를 설계하였다. 제안된 다중 비선형 S-box는 암호화에사용되어지는 키 데이터에 대하여 비선형 함수를 다중으로 사용하여 비도를 증가시켰으며DC 및 LC에 의한 암호해석을 방지하기 위하여 MDP, MLP를 최대로 할 수 있도록 하였다. 본 논문에서 제안한 다중 비선형 S-box 함수는 Synopsys Ver. 1999.10과 VHDL을 사용하여 회로합성 및 모의실험을 수행하였다.

• Journal of Biosystems Engineering
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• 제42권4호
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• pp.235-241
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• 2017

Purpose: It is to develop an agricultural three-directional dumping vehicle that can help farmers reduce intensive labor when carrying heavy loads and for easy dumping. In addition, a novel mechanism was applied for controlling the direction of the tilting cargo box by using a single hydraulic cylinder and simple apparatus. The overturning safety was analyzed to provide safe-use ground slope region of the vehicle to be used at upland fields and orchards. Methods: The developed three-directional dumping vehicle was constructed using a cargo box, vehicle frame, driving components, lifting components, and controller. The novel mechanism of controlling the dumping direction involves the operation of two latching bars, which selectively release or collapse the connecting edge between the vehicle frame and cargo box. A multibody dynamics analysis software (RecurDynV8R5) was used to determine the safe-use ground slope area when tilting the cargo box at slopes. A computer analysis was conducted by increasing the ground slope while rotating the vehicle when the cargo box comprised loads of 300 and 500 kg and stacking heights of 40 and 80 cm, respectively. Results: The three-directional dumping vehicle was successfully manufactured, and the cargo box was tilted at $37^{\circ}$ and $35^{\circ}$ for dumping forward and sideways. The latching bars were manually and selectively collapsed with the vehicle frame to control the dumping direction. When forward dumping, the safe-use ground slope was over $20^{\circ}$ in all vehicle directions and loaded conditions. Conclusions: A three-directional dumping vehicle was developed to reduce labor-intensive work in the farming environment. The user can easily control the dumping direction by using the control panel. The vehicle was safe to be used in most of the Korean upland fields and orchards (area over 96%) for the forward dumping.