• 대한전자공학회논문지SP
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• 제48권6호
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• pp.68-76
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• 2011

본 논문에서는 기존 무안경식 3D 디스플레이의 제한된 시야각으로 인한 3D 시청에서의 불편함을 해소하기 위해 새로운 패렐랙스 배리어 방식을 제안한다. 제안된 방식은 기존 패렐랙스 배리어의 TN-LCD 구조에서 LC를 공유하는 이중 계층의 ITO 쌍을 추가하였으며, 시선 추적 장치에 의해 시청자의 위치를 감지하여 자동으로 3D 시야각을 시청자의 위치에 맞도록 변화 시킬 수 있는 이중 계층의 패렐랙스 구조를 갖는다. 제안한 이중 계층 패렐랙스 배리어 방식을 시제품으로 구현하고 실험한 결과, 제안한 방식의 유효성을 확인할 수 있었다.

• 미생물학회지
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• 제26권1호
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• pp.20-26
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• 1988

Three $NIf^{-}$ -mutants were isolated from Enterbacter agglomerans 339 through the transposon umtagenesis using a RP4-mobilising system for its nif-gene characterization. All mutants hadn't acetylene-reduction ability. Then we confirmed that Tn5 was inserted into all conserved nif-plasmids through the Southern Hybridization.

• 한국물환경학회지
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• 제32권2호
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• pp.142-148
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• 2016

토지이용이 혼재되고 하수관거 시스템이 미흡한 유역의 강우유출 특성을 파악하는 것은 매우 어렵다. 본 연구에서는 팔당호 유역에서 토지 이용 및 하수관거 형태에 따른 강우 유출 특성을 파악하고자 하였다. 이를 위해 팔당호 유역 7개 시·군에서 공공 하수관거 시스템 지역 48개소, 개인하수처리시설 지역 28개소에 대한 강우 유출수 모니터링을 실시하였다. 개인하수처리시설 지역의 토지 이용은 산림과 논의 비율이 높았으며 SS, TN, TP EMCs와 초기세척강도가 공공하수처리지역에 비해 높게 나타났다. 또한 초기 강우 차집 시스템을 설치하여 초기강우 유출수 43%를 처리할 경우 59%의 TP 유출부하량을 저감할 수 있을 것으로 기대된다. 개인하수처리시설이 설치된 지역에서 강우량 및 강우지속시간과 영양염류 유출 부하량은 양의 상관관계(R>0.6)를 나타내어 팔당호의 부영양화 문제를 관리하기 위해 개인하수처리지역에 대한 우선적 정책이 필요함을 알 수 있다.

• Water Engineering Research
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• 제5권2호
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• pp.55-68
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• 2004

The GLEAMS (Groundwater Loading Effects of Agricultural Management System, version 3.0) water quality model was used to predict hydrology and water quality and to evaluate the effects of soil types from a cattle-grazed pasture field of Bermuda-Rye grass rotation with poultry litter application as a fertilizer in North Alabama. The model was applied and evaluated by using four years (1999-2002) of field-measured data to compare the simulated results for the 2.71- ha Summerford watershed. $R^2$ values between observed and simulated runoff, sediment yields, TN, and TP were 0.91, 0.86, 0.95, and 0.69, respectively. EI (Efficiency Index) of these parameters were 0.86, 0.67, 0.70, and 0.48, respectively. The statistical parameters indicated that GLEAMS provided a reasonable estimation of the runoff, sediment yield, and nutrient losses at the studied watershed. The soil infiltration rates were compared with the rainfall events. Only high intensity rainfall events generated runoff from the watershed. The measured and predicted infiltration rates were higher during dry soil conditions than wet soil conditions. The ratio of runoff to precipitation was ranging from 2.2% to 8.8% with average of 4.3%. This shows that the project site had high infiltration and evapotranspiration which generated the low runoff. The ratio of runoff to precipitation according to soil types by the GLEAMS model appeared that Sa (Sequatchie fine sandy loam) soil type was higher and Wc (Waynesboro fine sandy loam, severely eroded rolling phase) soil type relatively lower than the weighted average of the soil types in the watershed. The model under-predicted runoff, sediment yields, TN, and TP in Wb (Waynesboro fine sandy loam, eroded undulating phase) and Wc soil types. General tendency of the predicted data was similar for all soil types. The model predicted the highest runoff in Sa soil type by 105% of the weighted average and the lowest runoff in Wc soil type by 87% of the weighted average

• 한국컴퓨터정보학회논문지
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• 제9권3호
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• pp.55-62
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• 2004

현대의 통합 의료 환경의 성공적인 운영에서 디지털 기술이 중요한 역할을 차지한다. 악화되는 의료 경영 환경을 극복하기 위해서는 비즈니스 서비스 프로세스 및 의사결정 지원시스템의 정보화를 통한 비즈니스 서비스, 비용 및 관리의 효율성 향상을 이룩하여야 한다. 이러한 문제를 해결하기 위하여 HIS가 도입되었다. 이에 본 논문에서는 HL7 기반으로 레거시 시스템과의 연동을 통해 업무 및 진료의 효율성을 향상시키기 위한 HIS를 제안한다. 즉 HL7 기반으로 OCS나 PACS 등과 같은 레거시 시스템들과 연동할수 있는 HIS 시스템을 구축한다. 즉 통합 모듈 분석을 통한 효율적인 HIS 시스템 개발 방법을 제시한다.

• 한국축산시설환경학회지
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• 제21권1호
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• pp.21-28
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• 2015

We studied the possibility on the application of the Thermophilic Aerobic Oxidation (TAO) process to anaerobic digestate stabilization. In treating digestate with TAO reactor the internal temperature of the reactor was increasing higher and $51^{\circ}C$ and over was maintained after 6 days on. The physiochemical compositions of liquids increased from pH 8.1 to 9.8 and EC decreased from 29.8 to 12.0 mS/cm in treating process of digestate with TAO reactor. CODcr decreased from 22,654 to 18,843 mg/L, showed about 16.82% of remove efficiency. TN and $NH_4-N$ decreased from 4,813 to 1,733 mg/L, from 3,815 to 812 mg/L respectively, which showed about 64.0% and 78.7% of removal efficiency respectively.

• 한국물환경학회지
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• 제25권1호
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• pp.26-36
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• 2009

Combined sewer system (CSS) has been built in the most urban areas across the nation. During dry weather conditions, CSS works fine. But during heavy rain storms, combined sewage frequently overflows into the stream. This study simulated the hydrologic cycle and pollutant loads (BOD, SS, TN and TP) in the Mokgamcheon watershed considering combined sewer overflows (CSOs). PC storm water management model (PCSWMM) was used for continuous simulation and CSOs are considered using the flow divider. Sensitivity analysis, calibration and verification for water quantity and quality are carried out. To verify CSOs, field measurements of CSOs are compared with simulated results. As a result, 41.3% of precipitation flows into the stream directly and 1.1% of water supply flows into stream as CSOs. 6.5% of BOD total loads, 12.0% of SS, 13.6% of TP, and 29.2% of TN are from CSOs. This result will be effective to the integrated watershed management for sustainability.

• Journal of Ecology and Environment
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• 제39권1호
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• pp.31-42
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• 2016

The object of this study was to determine long-term temporal and spatial patterns of nutrients (nitrogen and phosphorus), suspended solids, and chlorophyll (Chl) in Chungju Reservoir, based on the dataset of 1992 - 2013, and then to develop the empirical models of nutrient-Chl for predicting the eutrophication of the reservoir. Concentrations of total nitrogen (TN) and total phosphorus (TP) were largely affected by an intensity of Asian monsoon and the longitudinal structure of riverine (Rz), transition (Tz), and lacustrine zone (Lz). This system was nitrogen-rich system and phosphorus contents in the water were relatively low, implying a P-limiting system. Regression analysis for empirical model, however, showed that Chl had a weak linear relation with TP or TN, and this was mainly associated with turbid, and nutrient-rich inflows in the system. The weak relation was associated with non-algal light attenuation coefficients (Kna), which is inversely related water residence time. Thus, values of Chl had negative functional relation (R² = 0.25, p < 0.001) with nonalgal light attenuation. Thus, the low chlorophyll at a given TP indicated a light-limiting for phytoplankton growth and total suspended solids (TSS) was highly correlated (R² = 0.94, p < 0.001) with non-algal light attenuation. The relations of Trophic State Index (TSI) indicated that phosphorus limitation was weak [TSI (Chl) - TSI (TP) < 0; TSI (SD) - TSI (Chl) > 0] and the effects of zooplankton grazing were also minor [TSI (Chl) - TSI (TP) > 0; TSI (SD) - TSI (Chl) > 0].

• 전력전자학회:학술대회논문집
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• 전력전자학회 2001년도 전력전자학술대회 논문집
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• pp.292-295
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• 2001

This paper describes the implementation of UPS system controlled by the DSP. The digital techniques have been used tn overcome the problems of UPS system controlled by analog control circuits. By developing these systems using the digital technique we could increase the reliability and improve the electrical characteristics. And we designed and developed the system which is able to control UPSs and to monitor errors, statuses and actual values transmitted from UPS through internet. The UPSs also impose high demands on battery life time, reliability and energy-efficiency. These requirements can only be met by employing sophisticated battery management system(BMS). Therefore, a highly accurate, universal and inexpensive measuring system for BMS was developed.

• 한국멀티미디어학회논문지
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• 제11권8호
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• pp.1169-1178
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• 2008

웹 2.0에서 대부분의 정보는 사용자에 의해 생산되고, 사용자가 붙인 태그에 의해 분류되어진다. 현재 태그와 연관된 서비스 및 연구들은 자동 태깅 기법이나 태그 클라우드 구성 기술에 초점이 맞춰 진행되어짐에 따라, 태그에 의해 분류되어진 정보 및 리소스들을 효율적으로 분류하여 사용자에게 제공하는 연구는 미흡한 실정이다. 이에 본 논문에서는 웹상에 산재되어있는 리소스 및 그에 따른 태그 정보들을 수집하여 태그들 간의 연관성에 따라 맵핑하고, 이를 클러스터링하여 검색에 적용하기 위한 시스템을 설계 및 구현하였다. 또한 제안 시스템의 성능평가를 위해 태그 기반 대표사이트인 플리커 사이트의 이미지 검색 결과와의 정확성과 재현율을 비교 평가함으로서 향상된 검색결과를 제시하였다.