• 한국컴퓨터정보학회논문지
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• 제25권11호
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• pp.147-155
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• 2020

체계지원 소프트웨어는 함정 전투관리체계를 구성하는 소프트웨어 중의 하나로 모든 함정의 전투관리체계에 탑재되지만 기능 변경이 거의 일어나지 않는 특성을 가진다. 하지만, 이러한 특성에도 실제로는 신규함정 적용 시 장비 변경 등으로 인한 소프트웨어 수정이 불가피하게 이루어진다. 이러한 소프트웨어의 수정은 소프트웨어 신뢰성 시험 등의 작업을 초래하며, 개발 비용 증가의 핵심요인으로 작용한다. 본 논문에서는 기존 체계지원 소프트웨어의 구조를 분석하여 이를 보완할 수 있는 체계지원 표준화 아키텍처를 설계하였다. 휘처 모델(Feature Model)을 통해 체계지원 소프트웨어의 공통요소와 가변요소를 도출하고, 화이트 박스 재사용(White-Box Reuse)을 적용하여 소프트웨어 설계를 개선하였다. 또한, 기존 체계지원 소프트웨어와 개발 요소 및 신뢰성 시험 수행 시간을 비교하여 새로운 아키텍처의 효과성을 검증한 결과를 제시하였다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2008년도 춘계학술대회 논문집
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• pp.560-563
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• 2008

A modified polyol process is developed to enhance Pt loading during the preparation of Pt/C catalysts. With the help of the zeta potential, the effect of pH on the electrostatic forces between the support and the Pt colloid is investigated. It is shown experimentally that the surface charge on the carbon support becomes more electropositive when the solution pH is changed from alkaline to acidic. However, this change does not affect the electronegative surface charge of Pt colloids already attained and stabilized by glycolate anions. This new behavior caused by the change in the solution pH accounts for the enhanced yield of the process and does not affect the Pt particle size. All our experimental results reveal that this simple modification is a cost effective method for the synthesis of highly Pt loaded Pt/C catalysts for fuel cells.

• 정보기술과데이타베이스저널
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• 제3권1호
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• pp.45-63
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• 1996

This paper presents an integrated object-oriented database approach for managing the evolution of products in agile manufacturing environments, Schema evolution modification facilities are provided to support full potential versioning of type definitions. All of the possible versions for a composite product are not explicitly represented to avoid version proliferation. However, valid configurations of any composite products can be provided to comply with customer demands, The attributes of composite products are classified in order to provide well-defined representation scheme for composite products and to be exploited in version control. The attributes are partitioned into composite-related and non composite-related categories. Composite-related attributes consist of subproducts and description ones. Subproducts attributes represent physical constituents of a composite product. Description attributes represent external features, assembling, and correspondence property. Interface attributes are introduced for managing configurability and version propagation. Version derivations due to the changes to the interface attributes are propagated toward the product composition hierarchy, The validity of configurations of composite products is checked by using configurability maps. Instance objects which represent the actual product instances are stored and manipulated in the database in order to support traceability during product life cycle.

• Structural Engineering and Mechanics
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• 제12권3호
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• pp.313-328
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• 2001

A multi-span bridge has the peak value of resultant girder moment or membrane stress at the interior support. In this paper, the spline finite strip method (FSM) is modified to obtain the more appropriate solution at the interior support where the peak values of solution exist. The modification has been achieved by expressing the shape function with non-periodic B-splines which have multiple knots at the boundary. The modified B-splines have the useful feature for interpolating the curve with sudden change in curvature. Moreover, the modified spline FSM is very efficient in analyzing multi-span box girder bridges, since a bridge can be modeled by an assembly of strips extended along the entire bridge length. Numerical examples of the bridge analysis have been performed to verify the efficiency and accuracy of the new spline FSM.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제22권2호
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• pp.122-131
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• 2019

The majority of children with cerebral palsy (CP) have feeding difficulties and are especially prone to malnutrition. The early involvement of a multidisciplinary team should aim to prevent malnutrition and provide adequate nutritional support. Thorough nutritional assessment, including body composition, should be a prerequisite for the nutritional intervention. As in typically-developed children nutritional support should start with dietary advice and the modification of oral feeding, if safe and acceptable. However, for prolonged feeding, in the presence of unsafe swallowing and inadequate oral intake, enteral nutrition should be promptly initiated and early gastrostomy placement should be evaluated and discussed with parents/caregivers. Gastrointestinal problems (oropharyngeal dysfunction, gastroesophageal disease, and constipation) in children with CP are frequent and should be actively detected and adequately treated as they can further worsen the feeding process and nutritional status.

• 한국해양공학회지
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• 제28권4호
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• pp.314-323
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• 2014

In this study, a gearbox and blade were modeled in the MASTA program, and the housing and carrier components were modeled using a finite element method. Using substructure synthesis, all the components were combined and used to establish a vibration model of a 2.5-MW wind turbine gearbox. In addition, the safety displacement factor was evaluated using an AGMA data sheet about bearing's outer race for the input shaft and output shaft. As a result, the bearing's outer race for the input shaft, and the radial and axial responses were satisfied by the $1^{st}$ and $2^{nd}$ planetary gears and the $3^{nd}$ helical gear transmission error(TE), respectively. However, the output shaft support bearing's outer race responses were not satisfied with the radial response by the $2^{nd}$ TE and axial response by the $3^{rd}$ TE. To reduce the vibration, tooth modification was needed. After profile tooth modification, at the outer race of the output shaft support bearing, the radial response was reduced by approximately $20{\mu}m$, and the axial response was reduced by approximately $6{\mu}m$.

• 한국인터넷방송통신학회논문지
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• 제11권1호
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• pp.151-158
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• 2011

기존의 근태관리시스템은 서버와 클라이언트가 분리되어 있지 않고, 데이터가 데이터베이스화 되어있지 않기 때문에 데이터 가공 및 관리 등에 있어서 많은 취약점을 가진다. 본 논문에서는 이러한 문제점들을 보완 해결한 새로운 웹기반 네트워크 근태관리 시스템을 제안 개발한다. 제안 개발 설계된 시스템의 주요한 특징 및 기여도는 다음과 같다. 첫째, 서버와 클라이언트를 분리하고 모든 데이터를 데이터베이스화 한다. 둘째, APM 서버를 구축하여 데이터의 가공 및 관리를 효율적으로 한다. 셋째, 근태관리 시스템의 정책적인 설정을 한다. 넷째, 근태관리 데이터 수집 및 휴무일 집계 업무등 사용자 위주의 서비스를 제공한다. 구현 및 성능평가 결과 제안된 웨기반 네트워크 근태관리 시스템은 효율적으로 근태관리를 지원할 수 있음을 알 수 있으며, 제안된 시스템은 현재 실제적인 현장에 적용하여 사용 중에 있다.

• International Journal of Computer Science & Network Security
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• 제22권1호
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• pp.241-247
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• 2022

This study examines teachers' implementation of strategies to modify the aggressive behavior of students with intellectual disabilities in Saudi Arabia, to determine the obstacles to their real-world execution. In addition, it presents potential approaches to overcome the obstacles to implementing strategies with this group of students. The research employed a qualitative design using semi-structured interviews as a data collection tool and applied a thematic analysis. The study population comprised 35 teachers of students with intellectual disabilities and the study sample numbered six teachers. The interviews were conducted via different methods: three by phone, two face-to face, and one using the Zoom platform. The results revealed inadequate understanding among teachers of intellectual disability and behaviour modification strategies, and this affected their capacity to develop plans that were compatible with the needs of students with intellectual disability. The findings also identified multiple obstacles that impede teachers' implementation of strategies to modify aggressive behaviour among students with intellectual disabilities; the most important being the lack of input from a psychological specialist when developing programs to modify aggressive behaviour. In general, it is apparent that programs for modifying aggressive behaviour are neither structured nor complementary, due to the scarcity of administrators with sufficient knowledge and familiarity with the characteristics and personalities of students with intellectual disabilities. This study presents several recommendations, the most important of which is that teachers of students with intellectual disability should develop themselves through training courses to enable them to deal with these students and create treatment plans that include strategies and clear steps to modify the aggressive behaviour of students with intellectual disabilities. To support teachers, it is also necessary to remove the obstacles facing education centres by providing financial support to create an environment in which they can access the required devices and equipment in their classes.

• 한국멀티미디어학회논문지
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• 제15권2호
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• pp.266-272
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• 2012

해외 시장을 겨냥한 소프트웨어의 상품화를 위해서는 여러 나라의 언어를 지원하는 다국어 지원 기능이 필요하다. 3-tier 구조는 2-tier 구조의 문제점을 해결하기 위해 애플리케이션을 분리하여 응용 계층을 두고 프리젠테이션 로직과 데이터베이스를 미들웨어로 연결하는 형태이다. 3-tier 구조의 장점은 애플리케이션의 부하 분산으로 성능이 향상되며 확장이 쉽고, 유지보수와 재사용이 용이하다는 점이다. 본 논문에서는 3-tier 구조의 기업용 소프트웨어를 대상으로 소프트웨어 개발과 유지보수, 지원 언어의 추가가 용이한 공통 리소스 활용 방식을 제안하고 빌링 솔루션의 다국어 버전 개발에 적용하여 유용성을 확인한다. 제안하는 방식은 기능 모듈마다 언어별 리소스 파일을 별도로 유지하는 닷넷의 기존 방식을 개선하여 언어별로 하나만 유지하고 다국어 지원 클래스 라이브러리 형태로 제공하여 메모리와 디스크의 공간 낭비를 줄인다. 또한 다국어 지원 클래스 라이브러리를 응용 계층에 배치하여 소프트웨어 개발과 유지보수, 지원 언어 추가가 용이하다. 한편 리소스 파일에 대한 부적절한 변경을 막기 위해 다국어 지원 클래스 라이브러리는 dll 파일로 제공한다.

• 한국표면공학회지
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• 제49권3호
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• pp.286-300
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• 2016

Pd-Ag alloy membranes have attracted a great deal of attention for their use in hydrogen purification and separation due to their high theoretical permeability, infinite selectivity and chemical compatibility with hydro-carbon containing gas streams. For commercial application, Pd-based membranes for hydrogen purification and separation need not only a high perm-selectivity but also a stable long-term durability. However, it has been difficult to fabricate thin, dense Pd-Ag alloy membranes on a porous stainless steel metal support with surface pores free and a stable diffusion barrier for preventing metallic diffusion from the porous stainless steel support. In this study, thin Pd-Ag alloy membranes were prepared by advanced Pd/Ag/Pd/Ag/Pd multi-layer sputter deposition on the modified porous stainless steel support using rough polishing/$ZrO_2$ powder filling and micro-polishing surface treatment, and following Ag up-filling heat treatment. Because the modified Pd-Ag alloy membranes using rough polishing/$ZrO_2$ powder filling method demonstrate high hydrogen permeability as well as diffusion barrier efficiency, it leads to the performance improvement in hydrogen perm-selectivity. Our membranes, therefore, are expected to be applicable to industrial fields for hydrogen purification and separation owing to enhanced functionality, durability and metal support/Pd alloy film integration.