• 한국인터넷방송통신학회논문지
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• 제14권6호
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• pp.303-308
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• 2014

이 논문은 대학 웹진 현황을 토대로 웹진의 목적과 어떤 기능을 담당하는지 사용자 인터페이스 디자인 측면에서 다루고자 한다. 이를 위해 웹진의 내용적 측면과 사용자 중심의 콘텐츠 구성과 컬러 및 내비게이션 디자인 측면에서 조사해 보았다. 조사를 통해, 향후 효과적인 대학 웹진 제작을 위해 사용자와 제작자가 어떤 점에 유의하고 참고하여 디자인해야하는지 알아보고자 하였다. 웹진 제작자와 사용자의 상호 적극적인 커뮤니케이션을 활성화하고 공감하기 위해 웹진이 주요한 기능을 하고 있는지 조사를 통해 알 수 있었으며, 웹진의 이런 특성을 살려 제작한 대학들은 사용자 인터페이스 디자인 측면에서도 우수함을 알 수 있었다.

• 한국정보시스템학회지:정보시스템연구
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• 제17권4호
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• pp.341-367
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• 2008

This study propose a model relating supplier's use of IOIS(Inter-Organizational Information Systems) to strategic benefits through extension of Subramani's research model. In extended model, collaboration serves as a safeguard for relationship-specific intangible asset. Specifically, we evaluate how two patterns of IOIS use by supplier(exploitation and exploration) relate to two specific types of relationship-specific intangible asset(business process specificity and domain knowledge specificity), which in turn are posited to promote collaboration and strategic benefits. To explore the current study, questionnaire survey was conducted on 72 first-tier supplier firms in the manufacturing industry. Based on the survey results, we posits the following : (1) Each pattern of IOIS use directly promotes a specific type of relationship-specific intangible asset. The path of the relationship between IOIS use for exploitation and domain knowledge specificity is positive but not significant. The other paths are positive and significant. (2) Both types of relationship-specific intangible asset have a positive and significant impact on collaboration. (3) Domain knowledge specificity influences on strategic benefits but business process specificity does not have an effect on them. (4) Collaboration affects supplier's strategic benefits. These findings provide a deeper understanding of the mechanism of how the pattern of IOIS use can result in strategic benefits for supplier firms.

• 한국해양공학회지
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• 제20권2호
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• pp.46-51
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• 2006

Moonpool characteristics of a cleaning skip related with the performance of a skip are experimentally investigated. Resistance performances of the ship and flow patterns in the moonpool are observed, in order to determine the effect of different shaped moonpool. The ways to reduce ship pithing motion caused by force in the moonpool are examined. Experimental results, using a scale model of cleaning ship with moonpool, show that the step arranged in tier under water leads to significant improvements in performance, such us resistance and ship pithing motion. Depending upon the shape of step in the moonpool, the results indicate that the increment of resistance performance may be up to 35%, especially in the case of no step or high step.

• ETRI Journal
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• 제42권2호
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• pp.175-185
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• 2020

Inter-cell interference (ICI) is a major problem in heterogeneous networks, such as two-tier femtocell (FC) networks, because it leads to poor cell-edge throughput and system capacity. Dynamic ICI coordination (ICIC) schemes, which do not require prior frequency planning, must be employed for interference avoidance in such networks. In contrast to existing dynamic ICIC schemes that focus on homogeneous network scenarios, we propose a novel semi-distributed dynamic ICIC scheme to mitigate interference in heterogeneous network scenarios. With the goal of maximizing the utility of individual users, two separate algorithms, namely the FC base station (FBS)-level algorithm and FC management system (FMS)-level algorithm, are employed to restrict resource usage by dominant interference-creating cells. The distributed functionality of the FBS-level algorithm and low computational complexity of the FMS-level algorithm are the main advantages of the proposed scheme. Simulation results demonstrate improvement in cell-edge performance with no impact on system capacity or user fairness, which confirms the effectiveness of the proposed scheme compared to static and semi-static ICIC schemes.

• Computers and Concrete
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• 제24권6호
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• pp.555-560
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• 2019

During the application of shotcrete, a part of the concrete bounces back after hitting to the surface, the reinforcement or previously sprayed concrete. This rebound material is definitely not added to the mixture and considered as waste. In this study, a deep neural network model was developed to predict the rebound material during shotcrete application. The factors affecting rebound and the datasets of these parameters were obtained from previous experiments. The Long Short-Term Memory (LSTM) architecture of the proposed deep neural network model was used in accordance with this data set. In the development of the proposed four-tier prediction model, the dataset was divided into 90% training and 10% test. The deep neural network was modeled with 11 dependents 1 independent data by determining the most appropriate hyper parameter values for prediction. Accuracy and error performance in success performance of LSTM model were evaluated over MSE and RMSE. A success of 93.2% was achieved at the end of training of the model and a success of 85.6% in the test. There was a difference of 7.6% between training and test. In the following stage, it is aimed to increase the success rate of the model by increasing the number of data in the data set with synthetic and experimental data. In addition, it is thought that prediction of the amount of rebound during dry-mix shotcrete application will provide economic gain as well as contributing to environmental protection.

• 인터넷정보학회논문지
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• 제11권1호
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• pp.15-20
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• 2010

본 논문은 무선 브로드캐스트 환경에서 인접한 노드들로부터의 정보를 활용하여 질의접근시간과 에너지소모를 줄이기 위한 인덱스 기법을 소개한다. 우리는 정보의 선별적 청취를 위해 HLBS라 불리는 3-계층 위치기반 순차적 접근방식의 인덱스를 제안한다. HLBS는 객체들의 위치를 참고한 순차적인 접근탐색 구조를 통해 포인터 없이 모든 객체의 인덱스를 구성한다. HLBS는 단순하고 적은 크기의 인덱스 구조로 무선 브로드캐스트 채널에서 효율적인 정보탐색을 지원한다. 시뮬레이션을 통해 제안 기법의 효율적인 정보검색의 성능을 증명하였다.

• 한국기후변화학회지
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• 제5권3호
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• pp.219-230
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• 2014

In this study, greenhouse gas emission of magnesium industry was estimated and the reduction potential of the greenhouse gas emission was evaluated with reduction technologies. Default value of IPCC guideline was used to calculate the greenhouse gas emission and $SF_6$ alternatives were considered in reduction potential. Import of magnesium ingot was 22,806 ton in 2013, which will be expected to increase to 81,700 ton with 20% rate in 2020. Magnesium ingot was consumed to produce magnesium alloy in diecasting process. Recently, commercial production of crown magnesium and magensium plate began. Based on ingot consumption, $CO_2$ emission of domestic magnesium industry was estimated to 504,000 ton, which is about 0.79% of domestic industrial emissions. Reduction potential of diecasting process was estimated to 489,320 ton by changing SF6 to alternative gases such as HFC-134a, Novec-612. Emission factor of Tier 3 level should be developed to enhance the accuracy of greeenhouse gas emission of magnesium industry.

• Journal of Genetic Medicine
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• 제18권1호
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• pp.31-37
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• 2021

Purpose: To summarize the results of chromosomal microarray analysis (CMA) for copy number variants (CNVs) detection and clinical utility in a single tertiary hospital. Materials and Methods: We performed CMA in 46 patients over the course of two years. Detected CNVs were classified into five categories according to the American College of Medical Genetics and Genomics guidelines and correlated with clinical manifestations. Results: A total of 31 CNVs were detected in 19 patients, with a median CNV number per patient of two CNVs. Among these, 16 CNVs were classified as pathogenic (n=3) or likely pathogenic (LP) (n=11) or variant of uncertain significance (n=4). The 16p11.2 deletion and 16p13.11 deletion classified as LP were most often detected in 6.5% (3/46), retrospectively. CMA diagnostic yield was 24.3% (9/37 patients) for symptomatic patients. The CNVs results of the commercial newborn screening test using next generation sequencing platforms showed high concordance with CMA results. Conclusion: CMA seems useful as a first-tier test for developmental delay with or without congenital anomalies. However, the classification and interpretation of CMA still remained a challenge. Further research is needed for evidence-based interpretation.

• 한국게임학회 논문지
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• 제2권2호
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• pp.113-119
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• 2002

인터넷 기술의 발전과 함께 급진전한 디지털경제는 그 적용분야에 따라 B2B, B2C, A2B등의 많은 부류를 형성하였다. 또한, 고객의 요구사항에 맞추어 전자상거래 시스템 구축기술도 객체지향기반에서 컴포넌트기반의 개발방법으로 도입되고 있으며, 개발환경은 기존의 C/S(Client/Server)환경에서 3-Tier, 웹 기반 아키텍처등으로 변화, 도입되고 있다. 이러한 배경으로 본 논문은 전자상거래에 사용될 수 있는 좌석 예약 및 확인 시스템을 다중서버환경에서 구현하였다. 이는, 분산환경에서 효율성을 높이기 위해 해당 중요 로직은 서버 컴포넌트 모델인 EJB를 활용하였고, Main Server를 위해 Resin Server환경의 Servlet을 이용한JSP와Java를 통하여 구현하였다. 따라서, EJB를 이용한 독립 컴포넌트를 통하여 전자상거래 시스템 로직사이의 독려성을 높였으며, 분산된 EJB서버를 통하여 해당 메소드를 호출함으로써 서버의 부하를 줄이고, 각 로직자원들을 효율적으로 관리할 수 있도록 하였다.

• Clinical and Experimental Pediatrics
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• 제60권9호
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• pp.282-289
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• 2017

Purpose: Recent advancements in molecular techniques have greatly contributed to the discovery of genetic causes of unexplained developmental delay. Here, we describe the results of array comparative genomic hybridization (CGH) and the clinical features of 27 patients with global developmental delay. Methods: We included 27 children who fulfilled the following criteria: Korean children under 6 years with global developmental delay; children who had at least one or more physical or neurological problem other than global developmental delay; and patients in whom both array CGH and G-banded karyotyping tests were performed. Results: Fifteen male and 12 female patients with a mean age of $29.3{\pm}17.6months$ were included. The most common physical and neurological abnormalities were facial dysmorphism (n=16), epilepsy (n=7), and hypotonia (n=7). Pathogenic copy number variation results were observed in 4 patients (14.8%): 18.73 Mb dup(2)(p24.2p25.3) and 1.62 Mb del(20p13) (patient 1); 22.31 Mb dup(2) (p22.3p25.1) and 4.01 Mb dup(2)(p21p22.1) (patient 2); 12.08 Mb del(4)(q22.1q24) (patient 3); and 1.19 Mb del(1)(q21.1) (patient 4). One patient (3.7%) displayed a variant of uncertain significance. Four patients (14.8%) displayed discordance between G-banded karyotyping and array CGH results. Among patients with normal array CGH results, 4 (16%) revealed brain anomalies such as schizencephaly and hydranencephaly. One patient was diagnosed with Rett syndrome and one with $M{\ddot{o}}bius$ syndrome. Conclusion: As chromosomal microarray can elucidate the cause of previously unexplained developmental delay, it should be considered as a first-tier cytogenetic diagnostic test for children with unexplained developmental delay.