• Journal of Information Processing Systems
• /
• 제7권2호
• /
• pp.287-298
• /
• 2011

Efficient service description and modeling methodologies are essential for dynamic service composition to provide autonomous services for users in ubiquitous computing environments. In our previous research, we proposed a 'u-service' ontology which is an abstract and structured concept for device operations in ubiquitous environments. One of the problems that we faced during the design process was that there are not enough standards to analyze the effectiveness of a u-service ontology. In this paper, we propose a quality evaluation model to facilitate the design process of a uservice ontology. We extract modeling goals and evaluation indicators based on the uservice description specification. We also present quality metrics to quantify each of the design properties. The experiment result of the proposed quality model shows that we can use it to analyze the design of u-service ontology from various angles. Also, it shows that the model can provide a guideline, and offer appropriate recommendations for improvements.

• KIEAE Journal
• /
• 제4권3호
• /
• pp.171-178
• /
• 2004

In recent years, the objective information for the environmental effect of architecture will be furnished to the designer and inhabitant in order to minimize an excessive energy consumption and environmental loads by buildings. In addition, an environmental friendly architectural certification program for a residence, office, and school facilities have been operated to spread and supply environmental friendly architecture. Most of the environmental friendly architectural certification programs proposed in the country are focused on the aspect of the physical environments of architecture in its certification ranges. In the case of a foreign country, however, the certification ranges of an environmental friendly architectural certification program for the school facilities among the programs will be extended not only to the standards for architectural design, environmental aspect, and maintaining and management basis by considering the characteristics of educational effects for students but also to the curriculum, policy of environment, and roles of local community facilities by reflecting a social aspect. Therefore, this study proposes a design and evaluation method by considering an ecological element that will satisfy the requirement for educational well-being that includes not only the requirement for school facilities according to the development of a new curriculum like a space for teaching and learning but also the improvement of the quality of educational environments and the objective of an ecological school.

• 한국정밀공학회지
• /
• 제15권9호
• /
• pp.82-92
• /
• 1998

An international standard for the product model data, STEP, and a standard for the distributed object technology, CORBA, will play a very important role in the future manufacturing environment. These two technologies provide background for the sharing of product data and the integration of applications on the network. This paper describes a prototype CAD/CAE environment that is integrated on the network by STEP and CORBA. Several application servers and client software were developed to verify the proposed concept. The present CAD/CAE environments are composed of several individual software components which are not tightly integrated. They also do not utilize the rapidly expanding network and object technologies for the collaboration in the product design process. In the design process in a large organization, sharing of application resources, design data and analysis data through the network will greatly enhance the productivity. The integration between applications can be supported by two key technologies, CORBA(Common Object Request Broker Architecture) and STEP(Standard for the Exchange of Product Model Bata). The CORBA provides interoperability between applications on different machines in heterogeneous distributed environments and seamlessly interconnects distributed object systems. Moreover, if all the data in the CAD/CAE environment are based on the STEP, then we can exclude all the data conversion problems between the application systems.

• Journal of Information Technology Applications and Management
• /
• 제30권6호
• /
• pp.81-90
• /
• 2023

In aviation, with the rapid transformation of the mobility industry, UAMs are emerging to operate green low-altitude airspace in urban environments. In order for UAM aircraft to fly safely transporting passengers and cargo in low-altitude urban airspace, a traffic control system that supports the safe operation of the aircraft is essential. In particular, traffic control systems that reflect the characteristics of the flight environment, such as operating at low altitude in urban environments for a short period of time, are required. In this study, we define the definition of UATM and its main services that perform traffic control for the safe operation of UAMs. In addition, we analyzed the development trends of UATM systems based on domestic and overseas cases. Based on these analyses, we present the results of the concept design of the UATM system. After analyzing UATM development cases, we found that there is no commercialized UATM system, but overseas development is focused on systems that can integrate ATM and UTM. And we identified key stakeholders and interface data, and performed UATM system architecture and functional design based on the identified data. Finally, as a necessary element for the future development of UATM systems, we propose the establishment and advancement of UAM traffic flow management systems, the establishment of integrated control systems, and the development of interface with aircraft operation systems in preparation for the unmanned UAM aircraft.

• 유체기계공업학회:학술대회논문집
• /
• 유체기계공업학회 2004년도 유체기계 연구개발 발표회 논문집
• /
• pp.711-714
• /
• 2004

A project to develop internet based collaborative engineering environments using agent technology is started to develop an agent based soft system for design and performance analysis of centrifugal pumps. This paper introduces the feasible technology needed to construct a pump design system based on software agent.

• 한국컴퓨터정보학회논문지
• /
• 제16권3호
• /
• pp.109-119
• /
• 2011

가상현실 시스템에서 높은 현실감과 직관적인 시각정보의 제공이 커다란 장점임에도 불구하고, 가상공간에서의 공간제시에 있어서 거리감각이 정확하게 전달되지 않는 문제점이 있다. 특히나 건축분야와 같은 공간을 취급하는 분야에서의 공간제시에 있어서의 왜곡문제는 시급히 해결해야할 필요성이 있다. 본 논문에서는 가상현실공간에서 거리감각을 고찰함에 있어서 거리감각을 조사하는 하나의 요소로서, 피실험자에 의한 이동거리추정판단에 관한 실험을 행하였다. 가상현실공간에서의 제시정보의 부족이 거리감각의 차이를 가져온다는 가정하에 몰입형 가상현실시스템에서 다양한 영상의 투영조건하에서 이동거리추정판단을 실험적으로 조사함으로써, 가상공간을 형성하는 시스템이 제공하는 정적, 동적 영상이미지의 특성에 의한 거리감각의 변화를 규명하고자 한다. 구체적인 실험방법으로는 실재 건축물의 복도를 모델링하여, 복도의 실재공간과 모델링된 가상공간을 피실험자에게 영상으로 제시하면서 이동거리추정판단의 심리실험을 수행하였다. 실험에 이용한 모델과 같은 실재의 복도에서도 이동거리추정판단의 실험을 동시에 수행함으로써, 실재환경과 가상현실환경과의 거리감각의 차이를 비교분석하고, 그 결과 실재환경과 비교하여 몰입형 가상현실시스템에서의 거리감각이 단축이 되는 경향이 나타남을 설명한다. 나아가, 몰입형 가상현실 시스템에 있어서 거리감각이 과소평가되는 경향이 나타나는 요인을 고찰하여, 영상의 해상도를 거리감각을 형성하는 중요한 요소로 판단하고 정적, 동적 이미지의 해상도의 변화에 따른 거리감각을 규명한다.

• 디지털융복합연구
• /
• 제11권2호
• /
• pp.397-405
• /
• 2013

21세기의 기술은 무선인터넷 기술 발달로 스마트환경을 급속도로 정착시켰다. 이러한 환경 속에 사용자들은 많은 스마트기기와 스마트콘텐츠를 접하고 있다. 본 연구는 스마트환경을 분석하고 스마트매체와 사용자간 인지작용에 대해 알아보고자 한다. 인지작용은 행위를 관찰, 기술하고, 사용자 중심의 시스템을 디자인하고, 사용자를 교육시키는데 매우 중요한 역할을 한다. 이를 중심으로 UX(User eXperience)와 UXD(User eXperience Design)에 대해 이론적 고찰을 하고, '시각적 측면, 상호 동작성(인터렉션) 측면, 기술적 측면'에서 사례 분석하여 효과적인 UXD(User eXperience Design) 인지작용을 사례를 통해 고찰해 보았다. 그 결과 시각적인 측면에서 사용자의 경험을 토대로 쉽게 알고 사용할 수 있는 디자인이 되어야하고, 소리나 인터랙션을 통한 사용자와 기기간의 상호동작(인터랙션)을 하고 있다는 것을 제공해야 하며, 위치기반인식이나 음성인식 등의 기술을 통해 사용자의 편의성을 도와야한다. 본 연구를 통하여 스마트환경과 인지작용의 이해를 돕고, 효과적인 UXD(User eXperience Design) 활용에 도움을 주고자 한다.

• 복식
• /
• 제61권5호
• /
• pp.1-20
• /
• 2011

As a follow-up of a study on design strategies to improve Korea's Korean coast guarduniforms, this study set out to propose Korean coast guard uniforms of a new concept that would meet the changing needs of the times and match the advanced technology and work environments. Three concepts of classical, nautical and techno chic were identified from the design strategies of the previous study. Using the results from a prototype show and preference survey, the investigator divided items into design, color, material, and detail and reflects demands for each of them. As a result, design was examined in four aspects of identity, acknowledgement, unity, and practicality and focused its improvement factors on design differentiated from other organizations' uniforms including ground police, segmentation of size system, adjustment of the length of upper garment to consider activity, and changes to the lines and silhouette to give out a modern image. As for color, the focus was placed on differentiated colors from other organizations' uniforms including ground police through dark blue and ocean color, change toward colors that reflect environmental characteristics, and unity in colors between the summer and winter uniform. As for material, the focus of improvement was put on elasticity, resistance against contamination, warmth retention, texture, wearing sensation, and functionality by taking into account convenience for field workers on coast guard vessels and branch offices who have much time in contact with ocean environments in order to make the materials high-grade. As for detail, structural details were added to give out a modern image such as changing the detail lines, efficiency of storage space, buttons, sleeve hems, ironing lines, and neck collars by taking into account environmental characteristics. The significance of the study lies in that it proposed a development model for large-scale uniform copy design by establishing copy design that secures functionality and is proper for an organization's social and cultural environment.

• ETRI Journal
• /
• 제27권5호
• /
• pp.595-607
• /
• 2005

The widespread use of the Internet has led to the problem of intellectual property and copyright infringement. Digital rights management (DRM) technologies have been developed to protect digital content items. Digital content can be classified into static content (for example, text or media files) and dynamic content (for example, VOD or multicast streams). This paper deals with the protection of a multicast stream on set-top boxes connected to an IP network. In this paper, we examine the following design and architectural issues to be considered when applying DRM functions to multicast streaming service environments: transparent streaming service and large-scale user environments. To address the transparency issue, we introduce a 'selective encryption scheme'. To address the second issue, a 'key packet insertion scheme' and 'hierarchical key management scheme' are introduced. Based on the above design and architecture, we developed a prototype of a multicasting DRM system. The analysis of our implementation shows that it supports transparent and scalable DRM multicasting service in a large-scale user environment.

• ETRI Journal
• /
• 제37권2호
• /
• pp.369-379
• /
• 2015

Fault management of virtualized network environments using user-driven network provisioning systems (NPSs) is crucial for guaranteeing seamless virtual network services irrespective of physical infrastructure impairment. The network service interface (NSI) of the Open Grid Forum reflects the need for a common standard management API for the reservation and provisioning of user-driven virtual circuits (VCs) across global networks. NSI-based NPSs (that is, network service agents) can be used to compose user-driven VCs for mission-critical applications in a dynamic multi-domain. In this article, we first attempt to outline the design issues and challenges faced when attempting to provide mission-critical applications using dynamic VCs with a protection that is both user-driven and trustworthy in a dynamic multi-domain environment, to motivate work in this area of research. We also survey representative works that address inter-domain VC protection and qualitatively evaluate them and current NSI against the issues and challenges.