• Korean Journal of Organic Agriculture
• /
• v.17 no.2
• /
• pp.151-170
• /
• 2009

The objectives of this study were to analysis the nutrient cycles of agricultural by-products. The region, in which agricultural by-products are circulated for use within the agroecosystem for minimizing the input of artificial nutrients as well as generation of wastes, and where ecologically industrial diversity is formed, was defined as the regional agriculture focused on eco-industrial approach. Plan in stages for promoting ahead with the regional agriculture focused on eco-industrial approach is as follows: First of all, "The Consultation Body for Circulating & Using By-products" should be formed. Secondly, usage of agricultural by-products is identified to select the facilities of recycling and its location including the type and amount. Thirdly, the facilities for recycling of resources and infrastructure are installed. Finally, the facilities for recycling and resource circulation system within the area are efficiently managed.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2014.11a
• /
• pp.248-251
• /
• 2014

We develop the signal processing method for implementing the human perceptual variant on frequency and space. The human visual perceptual sensitivity varies as frequency components and the human perceivable resolution diminishes as the distances further from the eye-focused point. For realizing the frequency sensitivity, we developed the signal direction adaptive multiband energy scaling method to weight the frequency components. The low-pass filtering is designed on the developed energy scaling method for diminishing perceivable resolutions as the deviated distance from the eye-focused point. The developed method not only enhances the frequency components of image signals at the eye-focused region but also smoothes non-perceivable detailed image signals at non-focused regions. The proposed method is verified by the subjective and objective evaluations that it can improve human perceptual visual quality.

• Journal of the Korea Society of Computer and Information
• /
• v.12 no.5
• /
• pp.11-18
• /
• 2007

In this paper, we propose a discriminative color quantization algorithm depending on the degree of focus of the regions. When we take pictures, we usually focus the object that we want to emphasize. This means that focused area on the photograph contains important information. If the focused area is displayed with more colors, we can express the important information in more detail. This paper proposes a color quantization method that determines the focused area and assigns more colors for the area.

• Journal of Information Technology Applications and Management
• /
• v.25 no.2
• /
• pp.117-132
• /
• 2018

This study examines the reason why consumers try to use the online shopping cart more, and especially analyzes the influence of personal psychological factor such as regulatory focus. Hypotheses are tested with a two-way ANOVA model using experimental data collected from 210 undergraduate students at a business school in South Korea. We found that prevention focused consumers try to use online shopping cart more than promotion focused consumers. It is possible that prevention focused consumers try to consider as many alternatives as possible to ensure safety as they focus on negative results or losses during shopping online. However, we also found out when the buying purpose is utilitarian, promotion focused consumers are not different from the promotion in terms of the usage intention of online shopping carts. Marketing managers can provide different messages customized for their consumers by leading them to use the online shopping cart in a more effective way.

• Proceedings of the Korean Information Science Society Conference
• /
• 2004.10a
• /
• pp.100-102
• /
• 2004

월드 와이드 웹의 보편화로 인하여 급속하게 증가하고 변화하는 웹 문서는 검색엔진으로 하여금 색인된 웹 문서와 현재의 웹 문서의 일관성을 유지할 수 없을 정도이다. 이러한 문제를 해결하기 위한 방법으로 연구되고 있는 것이 특정한 주제를 정하고 정해진 주제에 관련된 문서를 수집할 수 있는 focused crawler가 제시되고 있다. 지금까지 다양한 접근방법의 focused crawler가 개발되었지만, 모두 웹 링크를 이용하여 연결되어 있는 문서를 평가하는 처리과정을 거치고 있다. 그러나 이러한 과정은 다양한 내용을 포함하고 있는 문서일 경우 관련내용이 존재함에도 문서가 버려지거나 사용되더라도 문서상의 모든 링크를 사용하여 처리하는 비효율적인 문제점이 발생한다. 이 논문에서는 웰 문서 내부에 포함되어 있는 정보를 온톨로지를 이용하여 평가함으로써 다양한 내용을 가진 문서에서 사용자가 원하는 정보를 찾을 수 있을 뿐만 아니라 정보와 관련된 링크만을 사용하여 보다 효율적이고 정확한 문서를 수집하고자 한다.

• Journal of the Korean Society for Nondestructive Testing
• /
• v.22 no.6
• /
• pp.637-642
• /
• 2002

An arc-shaped line array slit has been used for the laser generation of focused Lamb waves. The spatially expanded Nd:YAG pulse laser was illuminated through the arc-shaped line array slit on the surface of a sample plate to generate the Lamb waves of the same pattern as the slit. Then the generated Lamb waves were focused at the focal point of which distance from the slit position is dependent on the curvature of slit arc. The proposed method showed better spatial resolution than the conventional linear array slit in the detection of laser machined linear defect and drill machined circular defect on aluminum plates of 2mm thickness. Using the focused waves, we could detect the linear defect and the circular defect with the improvement of spatial resolution. The method can also be combined with the scanning mechanism to get an image just like by the scanning acoustic microscope(SAM).

• Journal of the Korean Physical Society
• /
• v.73 no.9
• /
• pp.1289-1294
• /
• 2018

The present study aims to investigate experimentally and theoretically thermal ablation in soft tissues by using high intensity focused ultrasound (HIFU) to assess tissue damage during HIFU thermotherapy. The HIFU field was calculated by solving the axisymmetric Khokhlov-Zabolotskaya-Kuznetsov equation from the frequency-domain perspective. The temperature field was calculated by solving Pennes' bioheat transfer equation, and the thermal dose required to create a thermal lesion was calculated by using the thermal dose formula based on the thermal dose of a 240-min exposure at $43^{\circ}C$. In order to validate the simulation results, we performed thermal ablation experiments in a tissue-mimicking phantom and ex-vivo porcine liver for two different HIFU source conditions by using a 1.1-MHz, single-element, spherically focused HIFU transducer. The small difference between the measured and the predicted lesion sizes suggests that the implementation of the numerical model used here should be modified to iteratively allow for temperature-dependent changes in the physical properties of tissues.

• Journal of Industrial Convergence
• /
• v.6 no.1
• /
• pp.17-33
• /
• 2008

The purpose of this study is to examine what sort of causes have the effect on the coping behavior of the unemployed against their job loss. For the purpose of the study, following independent variables have been selected, locus of control, self-efficacy and autotelic personality. As dependent variables, two types of coping behaviors of individual have been used, problem-focused coping strategies and symptom-focused coping strategies. To test the hypotheses, structural equation modeling was employed. The model showed adequate fit to the data. The results of structural equation modeling exhibit that internal locus of control, self-efficacy and autotelic personality were positively related problem-focused coping strategies. And self-efficacy was negatively related to symptom-focused coping strategies. Implications are discussed and future research directions are outlined.

• Journal of applied mathematics & informatics
• /
• v.41 no.5
• /
• pp.1115-1128
• /
• 2023

In this paper, a novel hybrid method for multi-focus image fusion is proposed. The method combines the advantages of wavelet transform-based methods and focus-measure-based methods to achieve an improved fusion result. The input images are first decomposed into different frequency sub-bands using the discrete wavelet transform (DWT). The focus measure of each sub-band is then calculated using the Laplacian of Gaussian (LoG) operator, and the sub-band with the highest focus measure is selected as the focused sub-band. The focused sub-band is sharpened using an unsharp masking filter to preserve the details in the focused part of the image.Finally, the sharpened focused sub-bands from all input images are fused using the maximum intensity fusion method to preserve the important information from all focus images. The proposed method has been evaluated using standard multi focus image fusion datasets and has shown promising results compared to existing methods.

• Proceedings of the Materials Research Society of Korea Conference
• /
• 1993.11a
• /
• pp.59-59
• /
• 1993