• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.22 no.9
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• pp.628-634
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• 2010

This paper presents a feasibility study of a fresh air load reduction system by using an underground double floor space. The fresh air is introduced into the double slab space and passes through the opening bored into the footing beam. The air is cooled by the heat exchange with the inside surface of the double slab space in summer, and heated in winter. This system not only reduces sensible heat load of the fresh air by heat exchange with earth but also reduces latent heat load of the fresh air by ad/de-sorption of underground double slab concrete. In this paper, we proposed a simplified presumption method for the prediction of cooling and heating performance in the system. In conclusion the proposed method has been verified by comparing with the calculated value of the numerical analysis model by using nonlinear two-dimension hygroscopic question.

• Nuclear Engineering and Technology
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• v.55 no.4
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• pp.1342-1349
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• 2023

The planning accuracy of charged particle therapy (CPT) is subject to the accuracy of stopping power (SP) estimation. In this study, we propose a method of deriving a pseudo-triple-energy CT (pTECT) that can be achievable in the existing dual-energy CT (DECT) systems for better SP estimation. In order to remove the direct effect of errors in CT values, relative CT values according to three scanning voltage settings were used. CT values of each tissue substitute phantom were measured to show the non-linearity of the values thereby suggesting the absolute difference and ratio of CT values as parameters for SP estimation. Electron density, effective atomic number (EAN), mean excitation energy and SP were calculated based on these parameters. Two of conventional methods were implemented and compared to the proposed pTECT method in terms of residuals, absolute error and root-mean-square-error (RMSE). The proposed method outperformed the comparison methods in every evaluation metrics. Especially, the estimation error for EAN and mean excitation using pTECT were converging to zero. In this proof-of-concept study, we showed the feasibility of using three CT values for accurate SP estimation. Our suggested pTECT method indicates potential clinical utility of spectral CT imaging for CPT planning.

• Journal of Environmental Impact Assessment
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• v.26 no.3
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• pp.195-206
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• 2017

Recently, Discussion about BIM based LID (Low Impact Development) facilities management system is activated because interest of LID technique for urban water cycle restoration is increasing. For this reason, this paper developed the auto-checking module of the BIM (Building Information Model) based supply output table. This module will be the foundation of the BIM based LID facilities total management system. The research order is composed like next follows: (1) Select target area, (2) Make BIM model of LID facilities and extract supply output table, (3) Develop comparison module, (4) Analysis results. As a result, the authors made 27 LID facilities and developed the supply output table comparison automation module. So, the authors could find differences of 2D design documents based supply output table and BIm based supply output table. So, the authors made an improvement suggestion of the design plan and could construct foundation of the BIM based LID facilities total management system.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06d
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• pp.247-249
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• 2006

EPC는 RFID 태그용으로 개발된 차세대 식별코드체계지만 유통물류 분야를 비롯해 전 산업 분야에서 GTIN을 비롯한 EAN/UCC 식별코드도 EPC 체계에 수용될 수 있도록 방안이 마련되어 있어 향 후 바코드를 대체할 것으로 예상된다. 따라서 이 논문에서는 바코드시스템과 메타코딩 체제로서 이미 사용 중인 코드체제와 필요에 의해 새롭게 개발되는 코드체계를 모두 수용할 수 있는 EPC코드시스템에 대하여 고찰하고 농산물코드를 EPC코드로 변환하는 방안에 대하여 기술한다.

• Annual Conference of KIPS
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• 2006.05a
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• pp.1299-1302
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• 2006

EPC는 RFID 태그용으로 개발된 차세대 식별코드체계지만 유통물류 분야를 비롯해 전 산업분야에서 GTIN을 비롯한 EAN/UCC 식별코드도 EPC 체계에 수용될 수 있도록 방안이 마련되어 있어 향 후 바코드를 대체할 것으로 예상된다. 따라서 이 논문에서는 바코드시스템과 메타코딩 체제로서 이미 사용 중인 코드체제와 필요에 의해 새롭게 개발되는 코드체계를 모두 수용할 수 있는 EPC코드시스템에 대하여 고찰하고 농산물코드를 EPC코드로 변환하는 방안에 대하여 기술한다.

• Proceedings of the SAREK Conference
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• 2005.06a
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• pp.24-24
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• 2005

• Proceedings of the SAREK Conference
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• 2005.06a
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• pp.146-146
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• 2005

• Proceedings of the SAREK Conference
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• 2007.06a
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• pp.81-81
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• 2007

• Proceedings of the Korean Ceranic Society Conference
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• 2002.10a
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• pp.140.1-140
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• 2002

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.132-132
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• 2004