• 한국통신학회논문지
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• 제17권4호
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• pp.398-414
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• 1992

Netted 레이다의 추적정보를 수집하기 위한 레이다 정보 통신망의 설계를 위하여 본 연구에서는 multi-static 레이다의 정보 전송용 근거리망을 공간적 계증구조로 분류하고 최하의 공간 계층인 group 계층의 통신 모델을 소프트웨어 모듈로 설계하여 이를 모듈간의 조합에 의한 기본적인 레이다 정보망 단위를 구성하므로써 여러가지 통신 link 형태에 대한 전송상태를 분석하였다. 각 통신 node에서의 데이터 전송에 관련된 프로세서들은 통계적 모델에 의한 알고리즘을 사용하였으며, 데이터 link를 통하여 이러한 부분적인 하위층 통신모델들을 하나의 지역망으로 구성한 후 내부 node의 전송성능 변화를 분석하였고 이에 따라 망구성전체에 대한 각 통신 link들의 전송특성 분석도 가능하였다.

• Computers and Concrete
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• 제1권3호
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• pp.303-324
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• 2004

The Component-Based Software Development (CBSD) has established itself as a sound paradigm in the software engineering discipline and has gained wide spread acceptance in the industry. The CBSD relies on the availability of standard software components for encapsulation of specific functionality. This paper presents the framework for the development of a software component for the design of general member cross-sections. The proposed component can be used in component-based structural engineering software or as a stand-alone program developed around the component. This paper describes the use-case scenarios for the component, its design patterns, object models, class hierarchy, the integrated and unified handling of cross-section behavior and implementation issue. It is expected that a component developed using the proposed patterns and model can be used in analysis, design and detailing packages to handle reinforced concrete, partially prestressed concrete, steel-concrete composite and steel sections. The component can provide the entire response parameters of the cross section including determination of geometric properties, elastic stresses, flexural capacity, moment-curvature, and ductility ratios. The component can also be used as the main computational engine for stand-alone section design software. The component can be further extended to handle the retrofitting and strengthening of cross-sections, shear and torsional response, determination of fire-damage parameters, etc.

• 한국CDE학회논문집
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• 제10권2호
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• pp.133-142
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• 2005

This paper proposes an object-oriented conceptual information model of mechanical assemblies, named open assembly model (OAM). The proposed assembly model primarily defines hierarchical relationships between parts and subassemblies. Together with the assembly hierarchy. the model also provides a way to represent tolerances, kinematic information, and parametric assembly constraints. Relational information such as mating conditions and degree of freedom between parts and subassemblies is captured via assembly features and relationships thereof. The information model is described using class diagrams of the Unified Modeling Language (UML), and instance diagrams are used to exemplify the proposed information model. The conceptual model presented in this paper is an integrated information model for assembly representation, which could supply necessary information for tolerance analysis and synthesis, kinematic simulation, and assembly simulation. Such a conceptual information model plays an important role for the exchange of information between modeling, analysis and planning systems. Hence, the proposed model could serve as a framework for developing data exchange standards of mechanical assemblies. The proposed model is demonstrated through a case study of a planetary gear assembly.

• 대한인간공학회지
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• 제32권6호
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• pp.529-534
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• 2013

Objective: This study determines which of two types of 2D menu is better on iPhone. Background: Menu systems have been important components in modern graphical user interfaces. Review of menu design studies for human-computer interaction suggests that menu design guidelines for smartphones need to be reappraised. Method: A nested factorial design was used. Twenty-four participants were divided into two groups. The subjects were nested within the menu type. Two types of menus are an overview menu and a text menu. Two different breadth levels are 16 and 64. The participants performed five tasks in each breadth level. A task is defined as locating a product or product class on the deepest level of the hierarchy. An Apple iPhone 2G was used. Results: The results for ANOVA indicated a lack of a significant difference for time to respond between the two types of 2D menus. The overview menu showed the better satisfaction score between the two menu types. Conclusion: Even though the differences were not significant, an overview menu tended to show better performance and preference scores than a text menu that required scrolling. Application: This study can provide menu design guidelines when 2D menus are considered for small displays in a high breadth level.

• 한국정보시스템학회지:정보시스템연구
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• 제12권1호
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• pp.145-158
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• 2003

Workflow is the automation of a business process, in whole or part, during which documents, information or tasks are passed from one participant to another for action, according to a set of procedural rules. The software selection problem is made difficult by the multiplicity of competing products and the lack of expertise and experience of users in the methods of software evaluation. Although the selection process for workflow is similar to that proposed for the acquisition of any software packages, differences arise in their evaluation criteria and choice methods. In this paper, we suggest the Analytic Hierarchy Process(AHP) method for selecting workflow software. The AHP is an intuitively easy method for formulating and analyzing decisions. It was developed to solve a specific class of problems that involves prioritization of potential alternate solutions. We showed how to evaluate 9 commercial workflow products by deciding the relative importance of the main criteria in the AHP model. We utilized the evaluation data for criteria ready suggested by specialist groups. Our methodology will be helpful to those who are going to adopt a best workflow product in their organizations. Although the criteria and their evaluation scores regarding workflow products are suggested, it is not easy to apply them to a real case and get solutions without a model.

• 한국측량학회지
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• 제33권3호
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• pp.173-179
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• 2015

In this paper, object-based classification of urban areas based on a combination of information from lidar and aerial images is introduced. High resolution images are frequently used in automatic classification, making use of the spectral characteristics of the features under study. However, in urban areas, pixel-based classification can be difficult since building colors differ and the shadows of buildings can obscure building segmentation. Therefore, if the boundaries of buildings can be extracted from lidar, this information could improve the accuracy of urban area classifications. In the data processing stage, lidar data and the aerial image are co-registered into the same coordinate system, and a local maxima filter is used for the building segmentation of lidar data, which are then converted into an image containing only building information. Then, multiresolution segmentation is achieved using a scale parameter, and a color and shape factor; a compactness factor and a layer weight are implemented for the classification using a class hierarchy. Results indicate that lidar can provide useful additional data when combined with high resolution images in the object-oriented hierarchical classification of urban areas.

• 융합보안논문지
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• 제18권3호
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• pp.53-59
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• 2018

본 논문에서는 효율적인 사물 이미지 분류를 위한 계층적 이미지 분류 체계 방안에 대해 제안한다. 기존의 전체 이미지를 한 번에 분류하는 무 계층 이미지 분류에서는 상대적으로 유사한 모양을 가진 사물은 효율적으로 인식하지 못하는 모습을 보여줬다. 따라서 본 논문에서는 사물 이미지에 대해 계층적으로 분류를 시도하는 단계적 계층 구조에서의 이미지 분류 기법을 소개한다. 또한, 실제 시스템에 딥 러닝 이미지 분류가 적용되었을 때 발생할 수 있는 확장성에 대해서 고려하기 위해 확장성이 고려된 효율적인 클래스 구성 방식과 알고리즘도 소개한다. 이와 같은 방식은 상대적으로 유사한 형태를 보인 사물 이미지에 대해 더 높은 신뢰도로 이미지를 분류하는 것을 가능하게 한다.

• 정보보호학회논문지
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• 제11권1호
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• pp.55-63
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• 2001

대형 기업들은 많은 수의 사용자와 정보객체들을 가지고 있으며 승인된 사용자만이 지정된 정보 객체를 접근할 수 있도록 접근을 제어하는 것이 중요한 과제로 대두되고 있다, 그러나 기존에 제시된 접근제어 모델들은 기업의 접근제어 요구사항을 충분히 만족시키지 못하고 있다. 본 논문은 기업환경에 적합한 접근제어 모델을 제안하는 것을 목표로 한다. 이를 위해 접근제어와 관련된 기업 환경의 특성에 대해 분석하였고 이를 바탕으로 과업-역할기반 접근제어(T-RBAC) 모델을 제안하였다. 이 모델은 과업 및 과업 분류에 기초하고 있으며, 과업이 속한 클래스의 특성에 따라 서로 다른 접근제어를 적용 할 수 있도록 하였다. 또한 권한관리를 용이하게 하기 위하여 감독-역할계층을 지원할 수 있도록 하였다.

• International Journal of Computer Science & Network Security
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• 제21권7호
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• pp.284-296
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• 2021

Quality Models are important element of the software industry to develop and implement the best quality product in the market. This type of model provides aid in describing quality measures, which directly enhance the user satisfaction and software quality. In software development, the inheritance technique is an important mechanism used in object-oriented programming that allows the developers to define new classes having all the properties of super class. This technique supports the hierarchy design for classes and makes an "is-a" association among the super and subclasses. This paper describes a standard procedure for validating the inheritance metric in Quality Model for Object-Oriented Design (QMOOD) by using a set of nine properties established by Weyuker. These properties commonly using for investigating the effectiveness of the metric. The integration of two measuring methods (i.e. QMOOD and Weyuker) will provide new way for evaluating the software quality based on the inheritance context. The output of this research shows the extent of satisfaction of the inheritance metric in QMOOD against Weyuker nine properties. Further results proved that Weyker's property number nine could not fulfilled by any inheritance metrics. This research introduces a way for measuring software that developed using object-oriented approach. The theoretical validation of the inheritance metric presented in this paper is a small step taken towards producing quality software and in providing assistance to the software industry.

• Educational Technology International
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• 제17권2호
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• pp.273-305
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• 2016

The EBS teaching coaching program, '선생님이 달라졌어요' broadcasted about 30 dramatic teaching improvement cases. The TV program has gained great attention and been used widely as a good example for making some meaningful improvements in teaching. However, there has not been an attempt to research and gather the series beyond the individual coaching examples for the viewers (mainly teachers) to obtain more comprehensive educational insights of the results. This study, therefore, reviews the program and conveys how the overall coaching actually took place, examines changes in classrooms, and discusses the implications the results with theoretical foundations. The researcher selected 12 teachers' coaching cases among 30 ones. Then the reviewers reviewed the program with the 6 categories. According to the results, the coaching took place 6-8 months for each individual teacher. The common difficulty teachers shared was a big gap between teachers' effort for teaching versus 'students problematic behaviors' in class. The overall direction for the coaching solution was 'to improve the relationship with students' first rather than to mainly focus on teaching the content. Students changed and actively participated in the learning process when teachers improved their relationships with the students. The researcher discussed how building good relationships with students greatly affects the improvement in teaching with the 'Needs Hierarchy' and 'Brain Science' theories.