• Journal of Climate Change Research
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• v.3 no.3
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• pp.211-224
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• 2012

Technology for energy recovery from waste can reduce the greenhouse gas emissions. So recently, there are several companies using RDF, RPF, WCF instead of using only coal fuel and it's part of the fuel on the increase. In this study, we developed Wood chip fuel $CO_2$ emission factor through fuel analysis. It's moisture content is 23%, received net calorific value is 2,845 kcal/kg, and received basis carbon is 34%. The result of emission factor is $105ton\;CO_2/TJ$, it's 5.9% lower than 2006 IPCC guideline default factor $112ton\;CO_2/TJ$. The gross GHG(Greenhouse gases) emissions of plant A is $178,767ton\;CO_2 eq./yr$, and Net GHG emissions is $40,359ton\;CO_2 eq./yr$. Therefore, the reduction of GHG emissions is $138,408ton\;CO_2/yr$ through using WCF, and I accounts for 77% of all GHG emissions.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.513-516
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• 2004

In this paper, a PWM Cuk AC-AC converter for power quality improvement of custom power is presented. The PWM Cuk AC-AC converter that is used in VVCF applications such as AC line conditioner, phase shifter is modelled by using complex circuit DQ transformation whereby the static characteristics equations such as voltage gain and power factor is analytically obtained. Finally, the PSIM simulation show the validity of the modelling and analysis.

• Proceedings of the KIPE Conference
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• 2003.11a
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• pp.141-144
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• 2003

In this paper, a PWM Cuk AC-AC converter for WCF applications such as AC line conditioner, phase shifter is presented. The PWM Cuk AC-AC converter is modelled by using complex circuit DQ transformation whereby the characteristics equations such as voltage gain and the interested voltage and current is analytically obtained. Finally, the PSIM simulation show the validity of the modelling and analysis.

• Proceedings of the KIPE Conference
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• 2005.07a
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• pp.116-118
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• 2005

In this paper, a three phase PWM noninverting Buck-Boost AC-AC converter for WCF applications is presented. The PWM noninverting Buck-Boost AC-AC converter is modelled by using vector DQ transformation whereby the basic DC characteristics equation is analytically obtained. Finally, the PSIM simulation shows the validity of the modelling and analysis.

• Journal of the Korean Association of Geographic Information Studies
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• v.22 no.4
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• pp.12-23
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• 2019

This study aims to suggest analysis schemes of urban forests acting as wind ventilation corridor(wind ventilation forest). For this purpose, wind corridor forests were classified into three types: wind-generating forests(WGF), wind-spreading forests (WSF), and wind-connecting forests(WCF), and they were classified into three grades. WGF, WSF and WCF were classified based on the density of forest type map, vegetation index, and ventilation networks, respectively. As a result of analyzing wind corridor forests for Daegu Metropolitan City(883.56㎢), the area of WGF was classified as 443.1㎢ and distributed in the northern and southern regions of Daegu Metropolitan City. Among them, the first grade of WGF occupied the largest area(345.59㎢) and the highest rate(54.44%) in Dalseong-gun. On the other hand, WGF was not found in Jung-gu, because this administrative district is isolated from the forest area. WSF was 32.4㎢, which included representative urban parks of Daegu Metropolitan City, and WSF were found relatively much in Suseong-gu and Dalseong-gun. However, WSF were distributed throughout Metropolitan City, and the vegetation index was not high. The ventilation network that can form WCF included major rivers and roads in Daegu Metropolitan City, but this network was not connected to the urban park from the outer forest. Therefore, it was judged that the formation of WCF connecting WGF outside the city and WSF inside the city would be important. The results of this study can be used as a basic data for systematic wind corridor forest projects, and can be used as basic data for establishing guidelines for wind corridor forest analysis at national and local levels.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.801-803
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• 2016

반도체 공정에서는 제조 장비의 운영을 위한 장비 제어 및 점검에서 데이터 처리가 높은 해상도의 데이터 수집을 필요로 하고 있다. 이 논문에서는 반도체 스마트 팩토리의 환경 적용을 위해 필요한 EDA(Equipment Data Acquisition) 시스템의 구성을 기술한다. 이를 위해 반도체 세정장비 AutoFOUP의 장비 구성 정보를 수집하는 EDA 시스템의 프로토타입을 SEMI 표준을 기반으로 설계한다. 구성된 EDA 시스템은 분산 시스템 환경에서 높은 상호 운영성 및 확장성을 지원하기 위해 WCF 프로그래밍 모델로 작성된 웹서비스로 구성한다. 개발된 EDA 시스템은 반도체 제조 공정에서 웹서비스 기술을 활용함으로서 이기종 운영 플랫폼에서 유용성을 제시한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.517-520
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• 2004

In this paper, a PWM Cuk AC-AC converter is modelled by using complex circuit DQ transformation whereby the equivalent model is obtained which has the complete information of the Cuk converter. Using the model, the dynamicc characteristics equations such as state equations is analytically obtained. Finally, the PSIM simulation show the validity of the modelling and analysis.

• The Journal of Internal Korean Medicine
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• v.37 no.2
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• pp.315-321
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• 2016

Objective: This study reports on the clinical effects of combinatorial Hyulbuchuko-tang on a deep-vein thrombosis patient.Method: The deep-vein thrombosis patient was treated using combinatorial Hyulbuchuko-tang and pharmacopuncture (water-soluble carthami flos, WCF) three times a day for 33 days. The effects of deep-vein thrombosis were measured using a 0-10 numerical rating scale (NRS) and external appearance.Result: Improvements in the NRS from 7 to 2 were observed after the combinatorial Hyulbuchuko-tang treatment.Conclusions: From these results, combinatorial Hyulbuchuko-tang may be considered to show improvement for patients with deep-vein thrombosis.

• Safety and Health at Work
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• v.2 no.2
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• pp.194-200
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• 2011

Objectives: Stressors in nursing put high demands on cognitive control and, therefore, may increase the risk of cognitive failures that put patients at risk. Task-related stressors were expected to be positively associated with cognitive failure at work and job control was expected to be negatively associated with cognitive failure at work. Methods: Ninety-six registered nurses from 11 Swiss hospitals were investigated (89 women, 7 men, mean age = 36 years, standard deviation = 12 years, 80% supervisors, response rate 48%). A new German version of the Workplace Cognitive Failure Scale (WCFS) was employed to assess failure in memory function, failure in attention regulation, and failure in action exertion. In linear regression analyses, WCFS was related to work characteristics, neuroticism, and conscientiousness. Results: The German WCFS was valid and reliable. The factorial structure of the original WCF could be replicated. Multilevel regression task-related stressors and conscientiousness were significantly related to attention control and action exertion. Conclusion: The study sheds light on the association between job characteristics and work-related cognitive failure. These associations were unique, i.e. associations were shown even when individual differences in conscientiousness and neuroticism were controlled for. A job redesign in nursing should address task stressors.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.14 no.2
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• pp.127-139
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• 1996

This paper presents a procedure to recover sea surface heights (SSH) and free-air (FA) gravity anomalies from dense satellite altimeter SSH data with enhanced accuracies over the full spectrum of the gravity field. A wavenumber correlation filtering (WCF) of co-linear SSH tracks is developed for the coherent signals of sub-surface geological masses. Orbital cross-over adjustments with bias parameters are applied to the filtered SSH data, which are then separated into two groups of ascending and descending tracks and gridded with tensioned splines. A directional sensitive filter (DSF) is developed to reduce residual errors in the orbital adjustments that appear as track patterned SSH. Finally, FA gravity anomalies can be obtained by the application of a gradient filter on a high resolution estimate of geoid undulations after subtracting dynamic sea surface topography (DSST) from the SSH. These procedures are applied to the Geosat Geodetic Mission (GM) data of the southern oceans in a test area of ca. $900km\;\times{1,200}\;km$ to resolve geoid undulations and FA gravity anomalies to wavelengths of-10 km and larger. Comparisons with gravity data from ship surveys, predictions by least squares collocation (LSC), and 2 versions of NOAA's predictions using vertical deflections illustrate the performance of this procedure for recovering all elements of the gravity spectrum. Statistics on differences between precise ship data and predicted FA gravity anomalies show a mean of 0.1 mgal, an RMS of 3.5 mgal, maximum differences of 10. 2 mgal and -18.6 mgal, and a correlation coefficient of 0.993 over four straight ship tracks of ca. 1,600 km where gravity changes over 150 mgals.