• 한국정보교육학회:학술대회논문집
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• 한국정보교육학회 2011년도 동계학술대회
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• pp.91-101
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• 2011

본 연구는 학교 교육과정 편성을 위한 학부모, 교사, 학생, 지역사회의 요구와 의견을 신속하게 파악하고, 이를 분석하여 학교 교육활동 및 운영을 효율적으로 하기 위한 온라인 설문조사 시스템 구현을 그 목적으로 한다. 온라인 설문조사 시스템은 프로그램 설치 비용이나 관리 비용을 절감할 수 있도록 오픈소스 설문조사 프로그램 Limesurvey을 기반으로 구현하도록 한다. Limesurvey는 설문조사를 위해 별도의 프로그램 개발 없이도 사용 가능하며 웹기반 템플릿 시스템 형태로 전체 디자인과 레이아웃을 제공하고 설문결과에 대한 기본적인 통계 분석 자료도 제공해 준다. 또한 Limesurvey는 웹호스팅에 간단히 프로그램을 설치하고 DB정보만을 입력하여 실행 가능하다. Limesurvey는 통계 결과를 간단히 그래프화 시킬 수 있으며 HTML, Word, Excel, CSV File, PDF 파일 형태로 저장 가능하고 SPSS나 PASW, R data등 다른 통계 처리 프로그램 위한 기본 데이터로도 저장이 가능하다. 초등학교 현장에서 교육과정 편성 기초조사 단계나 평가단계에서 활용되는 설문조사 시스템은 학교 홈페이지 운영업체나 기업에서 제공하는 상용화 프로그램을 이용하거나 회원가입을 통한 제한적인 형태의 온라인 설문조사 시스템을 운영할 수 밖에 없었다. 본 연구를 통하여 오픈소스 기반 형태의 Limesurvey 설문조사 프로그램을 운영한다면 통제처리에 대한 교사의 업무를 경감시킬 수 있으며 오프라인 수집 형태의 설문조사의 문제점을 극복할 수 있을 것으로 기대된다.

• 정보처리학회논문지D
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• 제16D권4호
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• pp.463-474
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• 2009

OLAP 이나 e-비즈니스 환경에서는 다차원 데이터의 효율적인 분석을 위하여, 데이터를 여러 형태로 표현하거나 저장한다. 이러한 다차원 구조의 데이터를 차원 애트리뷰트들의 값으로 표시되는 넓은 형태의 수평 뷰로 표현한다. 수평 뷰는 여러 소스로부터 수집한 요약 정보를 유지하도록 실체 뷰로서 저장되며, 복잡한 질의들을 효율적으로 처리하기 위해 사용된다. 그러나, 소스 데이터가 변경될 경우 수평 뷰들의 내용도 수정해야 하는 데, 소스 데이터들이 여러 사이트에 분산되어 있기 때문에 수평 뷰를 관리하는 것은 어렵다. 따라서, 본 연구에서는 점진적인 뷰 관리 방법 중의 하나로 차등 파일을 이용하여 수평 뷰를 관리하는 효율적인 방법을 제시한다. 이러한 방법은 상용 RDBMS에서 제공하는 PIVOT 연산을 이용하여 저장된 수직 형태의 소스 테이블을 수평 뷰로 변환하고, 수직 테이블의 변경 사항을 반영한 차등 파일을 이용하여 수평 뷰에서도 동일하게 적용하는 방법이다. 이를 위해, 우선 저장된 수직 테이블에서 수평 뷰로 변환하여 처리하는 전체적인 프레임워크를 제안한다. 제안한 프레임워크 하에서 수직 테이블을 수평 뷰로 변환하는 PIVOT 연산을 정의한다. 다음으로, 수직 테이블로부터 데이터가 변경될 경우, 데이터에 대한 변경 사항을 차등 파일로 저장한 후, 이를 이용하여 수평 뷰를 갱신하는 방법을 제안한다. 특히, 차등 파일의 구조는 수평 뷰의 구조와 다르기 때문에, 수평 뷰에 적합하도록 변경 사항을 변환해야 한다. 마지막으로 실험을 통하여 제안한 방법은 다른 방법에 비해서 평균 1.2$\sim$5.0배까지 성능을 향상시킴을 보인다.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2007년도 춘계학술대회 논문집
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• pp.401-404
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• 2007

Inertia welding is a solid-state welding process in which butt welds in materials are made in bar and in ring form at the joint face, and energy required for welding is obtained from a rotating flywheel. The stored energy is converted to frictional heat at the interface under axial load. The quality of the welded joint depends on many parameters, including axial force, initial revolution speed and energy, amount of upset, working time, and residual stresses in the joint. Inertia welding was conducted to make the large rotor shaft for low speed marine diesel engine, alloy steel for shaft of 140mm. Due to different material characteristics, such as, thermal conductivity and flow stress, on the two sides of the weld interface, modeling is crucial in determining the optimal weld geometry and parameters. FE simulation was performed by the commercial code DEFORM-2D. A good agreement between the predicted and actual welded shape is observed. It is expected that modeling will significantly reduce the number of experimental trials needed to determine the weld parameters.

• 한국기계가공학회지
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• 제13권5호
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• pp.35-42
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• 2014

The influence of sine wave striated surface roughness on load carrying capacity of a bearing is studied for thin film effect of slider bearing. A Reynolds equation appropriate for slider bearing is used in this paper for analysis and it is discussed using finite difference method of central difference scheme. For a slider bearing with sine wave simple roughness form, several parameters such as pressure, load capacity and shear stress of the bearing can be obtained and also this results can be stored in sequential data file for latter analysis. After all, their distribution can be displayed and analyzed easily by using the matlab GUI technique. The parameters such as amplitude, number of waviness and slope of the surface are used for discussing the load carrying capacity of the rectangular bearing. The results reported in this paper should be applied to the other slider bearing such as rectangular or round embossed surface of slider bearing.

• Journal of Applied Biological Chemistry
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• 제59권3호
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• pp.261-264
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• 2016

In soybean (Glycine max (L.) Merr.) seeds, phosphorus (P) is primarily stored in the form of phytate, which is generally indigestible by monogastric animals such as human, pig, poultry, and fish. Thus, this study was conducted to isolate soybean mutants with high available P. Inorganic P content was assessed in a total of 1,266 ethyl methanesulfonate (EMS) $M_4$ lines from the Pungsannamul cultivar. Among the tested lines, four EMS lines (PE379, PE432, PE2205, and PE2503) showed higher mean inorganic P ($1.21-1.56gkg^{-1}$) than did the Pungsannamul cultivar ($0.90gkg^{-1}$). Additionally, six EMS lines (PE718, PE828, PE1466, PE1552, PE3378, and PE3386) showed lower mean inorganic P ($0.38-0.60gkg^{-1}$). The high inorganic P mutants isolated in this study will be further investigated for phytate and total P levels. Moreover, the high and low inorganic P lines will be utilized in a future study of the biochemical pathway of phytate.

• ETRI Journal
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• 제36권2호
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• pp.264-270
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• 2014

This paper introduces a novel repetitive delivery scheme for the left and right views in service-compatible (SC) 3D video that provides full backward compatibility to a legacy DTV system while retaining HD 3D visual quality without additional bandwidth or a codec over the legacy broadcasting channel. The proposed SC delivery scheme transmits individual view sequences of a 3D video in interlaced form, that is, a left-view sequence of a 3DTV program to be used repeatedly is transmitted first and stored locally, and the right-view sequence of the 3D program is then transmitted. This paper specifically describes the signaling, synchronization, and storage format methods used to validate the proposed SC delivery scheme. The experiment results show that the proposed SC delivery scheme can be effectively applied for an SC 3DTV service without degrading the DTV quality using only legacy DTV platforms.

• 한국작물학회지
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• 제43권4호
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• pp.273-278
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• 1998

Carbohydrate metabolism and partitioning are dependent on relationships between sources and sinks which can be affected by rates of photosynthesis and respiration. Fructan, the major form of stored carbohydrate in tall fescue (festuca arundineacea Schreb.), changes in concentration during growth and in response to the environment. Objectives of this study were i) to examine the content and the composition of carbohydrates in five tissues (mature leaf blade, immature leaf blade, leaf elongation zone, terminal meristem, and root tips) of two tall fescue genotypes, one with high yield per tiller (HYT) and one with low yield per tiller (LYT), and ii) to compare the reserved and utilized carbohydrates among above five different tissues, particularly between the leaf elongation zone and root tips. The established vegetative tillers of the HYT and LYT genotypes were grown in a controlled-environment growth chamber. Water-soluble carbohydrate (WSC) in the leaf elongation zone was about 22% of dry weight in the HYT and about 19% in the LYT genotype. The root tip also had high WSC, about 12% of dry weight in the HYT and 6% in the LYT genotype. Hexoses and sucrose were the major components of total WSC in all tissues except the leaf elongation zone. The growing tissues (sinks), i.e., the leaf elongation zone and root tip, had a high proportion of low degree of polymerization fructan, i.e., 3 to 8 hexose units.

• 한국컴퓨터그래픽스학회논문지
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• 제4권1호
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• pp.55-66
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• 1998

This paper presents a simple method for relieving the ambiguity problems within the sub-voxel based surface-fitting approach for the surface construction. ECB algorithm is proposed to avoid the ambiguity problem which is the root of the holes within the resulting polygon based approximation. The basic idea of our disambiguation strategy is the use of a set of predefined modeling primitives (we call SMP) which guarantees the topological consistency of resulted surface polygons. 20 SMPs are derived from the extension of the concept of the elementary modeling primitives in the CB algorithm [3], and fit one to five faces of them to the iso-surface crossing a cell with no further processing. A look-up table which has a surface triangle list is pre-calculated using these 20 SMPs. All of surface triangles in the table are from the faces of SMPs and are stored in the form of edge list on which vertices of each surface triangle are located. The resulted polygon based approximation is unique at every threshold value and its validity is guaranteed without considering the complicated problems such as average of density and postprocessing. ECB algorithm could be free from the need for the time consuming post-processing, which eliminates holes by revisiting every boundary cell. Through three experiments of surface construction from volume data, its capability of hole avoidance is showed.

• 한국보건간호학회지
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• 제30권2호
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• pp.221-235
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• 2016

Purpose: This study explored experiences of diabetes education among educators of diabetes. Methods: Data were collected from individual in-depth interviews with 10 nurses and 2 dieticians with had at least 3 years of experience in diabetes education. Data collection was conducted between May 2014 and February 2015. All interviews were recorded and stored as digital audio files, which were then transcribed verbatim. Data were analyzed through qualitative content analysis. Results: Analysis showed that four categories could be derived from the data: 1) barriers of diabetes education from an educator's perspective, 2) barriers of diabetes education form a patient's perspective, 3) facilitating factors of diabetes education from an educator's perspective, and 4) facilitating factors of diabetes education from a patient's perspective. Conclusion: This study suggests the necessity to strengthen the policy systems and financial support at a national level to provide diabetes education with higher quality to patients. In addition, it is required to develop various diabetes education programs with consideration to patient characteristics.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 A
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• pp.207-210
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• 2003

In this paper, we have implemented the DVR system which is controlled far away, and added a function of TCP/IP Network for image data and control signal transmission, the DVR system has the advantage of easy to search and of no loss in stored quality. The continuously declining price of the hard drive presents the opportunity for the DVR system to displace the analog system. Also, with spread of the internet the needs of PC based the DVR system increase. Therefore, we have implemented DVR system within a function of network. When obtained image through the PTZ camera is transmitted to digital form, very large space of storage is required, hence image compression is essential. We use JPEG2000 for compression of image. JPEG2000 adopt DWT by means of transform. DWT concentrates important information of image on subband and has feature of multi-resolution. It is effective in order to express image. Thus JPEG2000 is suitable for image compression in DVR system. The significance of this paper is to design the DVR system which is controlled through TCP/IP network and to implement transmission of image compression using JPEG2000.