• 제어로봇시스템학회논문지
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• 제17권2호
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• pp.171-175
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• 2011

In this paper, I have developed a high-speed and high-resolution measuring device in order to check the performance of drycell. The system is developed for the drycell manufacturing plant. Measuring time is one of key factors to inference on the production speed. So the developed system is designed to generate the classified result up to 1200ea/min. In the other words, each product can be classified within 25ms. There have been many studies to estimate both state of charge as well as state of health, such as OCV (Open Circuit Voltage), SC (Short Circuit) and measuring impedance with frequency pulse. But those methods take a few second due to surface discharge. To overcome the phenomenon, I developed the method to engage the reverse current to two electrodes of battery. As a result, I could achieve to measure the indigenous capacity without the problem of surface discharge.

• Journal of Information Technology Applications and Management
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• 제17권4호
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• pp.107-126
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• 2010

IT capability is one of the main research topics in MIS area. Given the finding that IT investment does not necessarily contribute to better organizational performance, the concept of IT capability was selected as an alternative antecedent variable for IT's effect on performance. A number of existing MIS papers have shown that firms with the high level of IT capability lead to a better performance. However, very little research has been done concerning the issue of how the IT capability could be enhanced. Recently, enterprise architecture effort has been emerged as an avenue to better IT management. This study aims to empirically examine the relationship between EA effort and IT capability.

• 한국IT서비스학회지
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• 제7권2호
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• pp.25-39
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• 2008

As the amount of IT investment and the complexity of information systems in public agencies have been increased, efficient and structured management of IT systems is more emphasized. For the Korean government. ITA (Information Technology Architecture) is one of the core parts of the e-Government initiative. Also introducing and managing ITA in organizations is mandated by law in Korea. The objective of the paper is to study whether using ITA in public agencies is related with their IT capability and IT performance or not. A questionnaire had been designed for the purpose, and a survey had been performed on Korean public agencies. The survey results show that using ITA has influence on relation and technology capability. However, ITA does not influence on human capability and IT performance. The reason why using ITA is linked to relation and technology capability is that ITA includes relationship between both business and technology. Also ITA provides a technical reference model (TRM) and standard profile (SP), so it has influence on technology capability.

• Korean Chemical Engineering Research
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• 제48권5호
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• pp.621-626
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• 2010

본 연구에서는 이미다졸계의 이온성액체를 폴리스티렌계 고분자에 고정화시킨 촉매를 제조하고, 알릴글리시딜에테르(AGE)와 이산화탄소의 부가반응을 통한 알릴글리시딜카보네이트의 합성반응에서 이 촉매의 반응특성을 고찰하였다. 고정화된 이온성액체는 공중합된 폴리스티렌계 고분자에 이미다졸이 고정화됨으로써 형성되었다. 제조된 촉매에 대해서 EA, FT-IR, TGA 그리고 SEM 등 다양한 기기분석을 통하여 특성분석을 수행하였다. 고정화된 이온성액체 촉매는 반응온도 $120^{\circ}C$, 이산화탄소 압력 1.48 MPa에서 AGE 전환율이 80%이고 생성물의 선택도가 96% 이상으로 우수한 반응성을 나타내었다. 또한 고정화된 이온성액체 촉매는 4회 연속 사용하여도 초기의 활성이 크게 감소하지 않아 안정성이 좋은 것으로 나타났다.

• 한국동물위생학회지
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• 제27권1호
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• pp.17-29
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• 2004

A multiresidual analysis was performed to determine 12 sulfonamides(sulfacetamide, sulfadiazine, sulfisomidine, sulfathiazole, sulfapyridine, sulfamerazine, sulfamethazine, sulfamonomethoxine, sulfisoxazole, sulfamethoxazole, sulfaquinoxaline, and sulfadimethoxine) in beef and pork simultaneously. The multiresidual analysis for the sulfonamides currently used was able to analyze 5 kinds of sulfonamides at the same time. The method of this 12 sulfonamides multiresidual analysis in this study was matrix solid-phase dispersion(MSPD) by high performance liquid chromatography (HPLC) and liquid chromatography mass spectrometry (LC/MS). The recovery rate of the materials was measured by MSPD method with 3 different extraction solvents; Dichloromethane, DCM: Ethylacetate(3:1), DCM:EA(9:1). Also, samples (84 beef and 205 pork samples) which were positive by EEC-4 plate test from 2001 to 2003 were tested to investigate the kinds of sulfonamides using HPLC. The results from the study were as follows; 1. The recovery rate of the materials was measured by MSPD method with 3 different extraction solvents; Dichloromethane, DCM:Ethylacetate(3:1), DCM:EA(9:1). The method of extraction solvent with DCM:ethyl acetate(9:1) was the most excellent(87.7∼99.3%) in separation and reappearance. 2. In the LC/MS analysis. of sulfonamides, signal to noise ratio was showed relatively high in the positive mode and special ion in the quality analysis was determined via [M+H]$\^$+/ and m/z 156. A spectrum of sulfonamides was showed from all 12 sulfonamides. 3. The samples positive by the EEC-4 plate, a screening test method, were categorized by sulfonamides through Charm II and confirmed the kinds of sulfonamides through HPLC. 1) Among 84 beef samples positive by EEC-4 plate, 20 samples were positive by Charm II and identified as 7 sulfamethazine, 9 sulfadimethoxine, 1 sulfamonomethoxine and 3 unknown status. 2) Among 205 pork samples positive by EEC-4 plate, 42 samples were positive by Charm II and identified as 19 sulfamethazine, 1 sulfadimethoxine, 4 sulfamonomethoxine and 5 unknown status.

• 대기
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• 제30권4호
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• pp.361-376
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• 2020

This study evaluates multiple Regional Climate Models (RCMs) in simulating temperature and precipitation over the Far East Asia (FEA) and estimates the portions of the total uncertainty originating in the RCMs and the driving Global Climate Models (GCMs) using nine present-day (1981~2000) climate data obtained from combinations of three GCMs and three RCMs in the CORDEX-EA phase2. Downscaling using the RCMs generally improves the present temperature and precipitation simulated in the GCMs. The mean temperature climate in the RCM simulations is similar to that in the GCMs; however, RCMs yield notably better spatial variability than the GCMs. In particular, the RCMs generally yield positive added values to the variability of the summer temperature and the winter precipitation. Evaluating the uncertainties by the GCMs (VARGCM) and the RCMs (VARRCM) on the basis of two-way ANOVA shows that VARRCM is greater than VARGCM in contrast to previous studies which showed VARGCM is larger. In particular, in the winter temperature, the ocean has a very large VARRCM of up to 30%. Precipitation shows that VARRCM is greater than VARGCM in all seasons, but the difference is insignificant. In the following study, we will analyze how the uncertainty of the climate model in the present-day period affects future climate change prospects.

• 한국IT서비스학회지
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• 제11권1호
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• pp.39-58
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• 2012

This study was carried out to figure out the relationship between EAmaturity, information management capacity, and information performance, and find the effect between these variables and the reciprocal causation. The study found that EAmaturity has a positive effect on information resource management and performance. In other words, the effect of input, calculation, management and utilization factors on information planning in EAmaturity showed that calculation, management and utilization factors have a significant effect on the information planning. While the effect of input, calculation, management and utilization factors on information introduction and management showed that only both calculation and utilization have a significant effect on the information management factor. It says that EAinput in EAmaturity does not play a big part in the planning stage, as well as not go through a series of process that is connected to the maturity stage by immediate field application. Consequently, EAmaturity varies from the level that EAcreates introduction and performance according to organization. This suggests that the maturity and performance can be also changed by the level that EAcreates information performance by accepting and using this capability within organization as well as the capability to introduce and fully perform the EAsystem presented in enterprise architecture framework of public sector.

• 디지털융복합연구
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• 제9권5호
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• pp.235-251
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• 2011

21세기 기업경영에서 기업 내 IT(Information Technology: 정보기술)의 중요성과 복잡성이 급속히 증가되었고, 기업에서 필요로 하는 IT의 역할이 성공적으로 수행되기 위해서는 높은 수준의 IT 거버넌스와 효과적인 관리가 선행되어야 함에도 불구하고, IT 거버넌스의 확립 정도는 기업에 따라 큰 차이가 있다. 또한 IT 거버넌스 활동과 관리에 대한 실증적 연구 역시 충분하지 않다. 이에 본 연구는 거버넌스 이론을 근거로 하여 IT 거버넌스 활동과 성과, 그리고 기업성과간의 관계를 파악하는 연구모형과 가설을 도출하고 실증적으로 검증하였다. 본 연구는 비즈니스 전략과 IT 전략간의 연계성, IT 계획, 전사적 아키텍쳐, 프로젝트 관리 조직, 서비스 수준 관리, IT 컴플라이언스, 장애관리, 정보시스템 효과성, 가시성, 기업성과 등, 구성개념 간의 가설을 검증하기 위해 LISREL을 활용한 구조 방정식 모형을 개발하였고, 108개의 기업과 기관에 대한 설문 조사를 수행하였다. 연구 결과, 비즈니스 전략과 IT 전략간의 연계성은 IT 거버넌스 활동 중, IT 위원회와 IT 계획에 긍정적인 영향을 미치는 것으로 나타났다. IT 거버넌스 활동 중, IT 거버넌스 위원회, IT 계획, 서비스 수준 관리, 장애 관리는 IT 거버넌스 성과로서의 정보시스템 효과성에 긍정적인 영향을 미치는 것으로 나타난 데 반하여, IT 컴플라이언스는 정보시스템 효과성에 부정적인 영향을 미치는 것으로 나타났다. 또한 IT 계획, 전사적 아키텍쳐, 서비스 수준관리, IT 컴플라이언스는 IT 거버넌스 성과인 정보시스템 가시성에 긍정적인 영향을 마치지 않는 것으로 나타났다. 마지막으로 정보시스템 효과성과 가시성은 기업 성과에 긍정적인 영향을 미치는 것으로 나타났다. 본 연구는 IT 거버넌스에 대한 근거 이론들을 논리적으로 정리하여 IT 거버넌스의 이론적 배경을 체계적으로 확립하고 IT 거버넌스 활동 및 IT 거버넌스 성과, 비즈니스 성과를 포함하는 이차원적 성과를 제시함으로써 학계와 실무 측면에 공헌하고자 하였다.

• 한국건축시공학회지
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• 제7권3호
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• pp.123-130
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• 2007

This study investigated the fundamental properties and shrinkage properties of high performance concrete with water/binder ratio of 0, 30 and with combination of expansive additive and shrinkage reducing agent. According to the results, the fluidity of high performance concrete showed lower the using method in combination with expansive additive and shrinkage reducing agent than the separately using method of that, so the amount of superplasticizer increased when the adding ratio of expansive additive and shrinkage reducing agent increased. However the air content of concrete increased when used in combination with expansive additive and shrinkage reducing agent, so the amount of AE agent decreased. The compressive strength showed the highest at 5% of expansive additive, and decreased with an increase of the amount of shrinkage reducing agent. Furthermore, in order to reduce the shrinkage of high performance concrete, it was found that the using method in combination with expansive additive and shrinkage reducing agent was more effective than separately using method of that. Autogenous shrinkage was predicted using JCI model. Because JCI model is unable to consider the effect of EA and SRA, correction factor should be added to enhance the accuracy.

• 한국군사과학기술학회지
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• 제18권2호
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• pp.131-138
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• 2015

Energetic monomers with new design concept were synthesized for energetic prepolymers. Novel energetic monomers consisted of ring-opening polymerizable oxirane and a molecular explosive moiety instead of small explosophores as energetic functional groups. According to the design concept, glycidyl dinitroazetidine (GDNAZ) and glycidyl nitroazetidinol(GNAZO) energetic monomers were synthesized, respectively, and characterized by NMR, EA and GC MS. Heat of formation and detonation performance were calculated by theoretical method to evaluate energy performance of these novel energetic monomers. The result revealed that GDANZ and GNAZO possessed high potential as new energetic monomers for synthesizing energetic prepolymers and binders in PBXs.