• Proceedings of the KIEE Conference
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• 2007.10a
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• pp.313-314
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• 2007

현대 로봇 분야의 개발에 있어 지능형 서비스 로봇은 모듈 기반으로 구성될 수 있다. 여기서 모듈이란 로봇의 특정 태스크들 수행하기 위해 만들어진 자동화 하드웨어 단위를 의미한다. 이러한 모듈 기반의 로봇시스템 내부는 네트워크의 이종성에 따라 다양한 네트워크들을 통해 연결될 수 있기 때문에 다중 모듈간 안정적이고 효율적인 통신을 하기 위해서는 상호운영을 위한 기술이 뒷받침 되어야 한다. 이를 위해 본 논문은 모듈기반의 로봇을 위한 통신용 미들웨어를 제안한다. 제안된 미들웨어는 네트워크 인터페이스 계층과 네트워크 적응 계층으로 나누어진다. 네트워크 인터페이스 계층은 각 이종 인터페이스들을 논리적인 채널로 추상화하는 기능을 갖는다. 반면, 네트워크 적응 계층은 모듈간의 통신을 위한 메시지 형식을 정의하고 주소할당 및 이종 네트워크를 고려한 라우팅 기능들을 갖는다. 결국, 제안된 미들웨어는 두 계층을 통해 상위 로봇 어플리케이션 개발자들에게 네트워크의 투명성을 보장할 수 있으며 모듈 기반의 로봇내에서 모듈간의 안정적이고 효율적인 통신을 지원한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.3B
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• pp.380-389
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• 2010

Since the internet is intend to be the best effort service, the system that stream a large amount of high quality medias need a techniques to overcome the network status for implementation. In this paper, we design and implement a method that estimate quickly whether network permits the needed bandwidth of media and a method that control QoS through that. Presented system uses Relative One-Way Delay(ROWD) trend in the case of the former, and leverages temporal encoding among Scalable Video Coding(SVC) that is apt to apply real time comparatively in the case of the latter. The streaming server classifies the medias by real time to several rates and begins transmission from top-level and is reported ROWD trend periodically from the client. In case of the server reported only 'Increase Trend', the sever decides that the current media exceeds the available bandwidth and downgrades the next media level. The system uses probe packet of difference quantity of the target level and the present level for upgrading the media level. In case of the server reported only 'No Increase Trend' by the ROWD trend response of the probe packet from client, the media level is upgraded. The experiment result in a fiber to the home(FTTH) environment shows progress that proposed system adapts faster in change of available bandwidth and shows that quality of service also improves.

• Journal of Korea Society of Industrial Information Systems
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• v.26 no.4
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• pp.33-46
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• 2021

In Korea 2016, the largest earthquake occurred in Gyeongju since the beginning of monitoring earthquakes. Consecutively the second-largest earthquake occurred in Pohang. At that time, immediately after the earthquake, citizens were not notified adequate information for evacuation. In consequence the response process was very confusing and citizens were not able to properly evacuate to shelter. For resolving these problems, it is needed of a service to inform quickly information which citizens want to know immediately after the earthquake. So, we have developed the customized information service model, the earthquake safety service which help citizens to escape safely using an earthquake shaking alert device. In this paper, we will introduce this model and present the future direction of R&D and strategic plans for technology dissemination and improvement of practicality through user demand survey.

• Journal of KIISE:Information Networking
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• v.30 no.4
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• pp.494-503
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• 2003

The IEEE 1394 High Speed Serial Bus is a versatile, high-performance, and low-cost method of promoting interoperability between all types of A/V and computing devices. IEEE 1394 provides two transfer modes: asynchronous mode for best effort service and isochronous mode for best effort service with bandwidth reservation. This paper shows the bus performance and compared the transfer odes first at the link level and then at the application level. For the application level performance, we analyze the bus systems with fixed and adaptive interfaces, applied between the upper layer and the 1394 layer, using polling systems. Also we verifies the analysis models with simulation studies. Based on our analysis, we conclude that the adaptive interface reduces the bus access time and so increases the bus utilization.

• The Journal of the Convergence on Culture Technology
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• v.5 no.4
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• pp.105-114
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• 2019

Daytime activity services based on community care signify 'participatory integrated community care service' fused with diverse forms of community participation and care for adults with developmental disabilities after school graduation. They have the characteristics of lifelong care by life cycle in that adults with developmental disabilities 18 years and older receive daytime care and community participation programs. The purpose of this study is to examine community care based daytime activity services and to search for vitalization plans for daytime activity services that must unfold in the future for care programs that can be meaningful social participation opportunities for adults with developmental disabilities. Through literature review, we analyzed the state of daytime and social activity of adults with developmental disabilities as community care.Based on these findings, we devised ways to improve the daytime activities for the significant daytime of adults with developmental disabilities. At this, it proposed an increase of activity support vouchers, daytime activity service time expansions, expanded budget formulation for an increased number of daytime activity service subjects, expanded applications for the prioritization of the 20% of those with the most severe developmental disabilities and the composition of separate teams, and the role reinforcement of support centers for people with developmental disabilities.

• The KIPS Transactions:PartC
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• v.15C no.4
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• pp.245-252
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• 2008

An emergency service over Voice over IP (VoIP) network is an essential condition, like the existing telecommunication services. To support for the emergency services, standardization works have been performed. The National Emergency Number Association (NENA) has been developing the framework and procedures for an emergency service for Non-IP based network, rather than protocols. In contrast, the Internet Engineering Task Force (IETF) has been only focused on end-to-end IP-based emergency calls. The NENA architecture is incompatible with the IETF protocols. To solve the problem, we design and implement a SIP-based VoIP emergency system by adopting the NENA architecture and by applying IETF protocols, for both IP-based Pubic Safety Answering Point (PSAP) and PSTN-based PSAP. It is implemented and tested under UNIX environment.

• The KIPS Transactions:PartC
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• v.13C no.5 s.108
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• pp.613-620
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• 2006

From both techlical and economic viewpoints, DiffServ IP QoS architecture is accepted as a more practical solution because of the complexity Problem of the other IntServ architecture. In this paper, we propose several models to support DiffServ QoS in DSL broadband access networks and discuss about migration path from current best-effort DSL networks to DiffServ-enabled ones. Since DSL networks are recently and widely deployed in the world amount ot new investment, compatibility with existing QoS-unaware DSL systems, and compatibility with existing charging systems as well as effective support of various QoS services must be carefully considered when we design DiffServ QoS support models in DSL networks. The DiffServ models proposed in this paper are divided into static DiffServ models and dynamic DiffServ models which are near-term solutions and long-term solutions repecitively. The static DiffServ models include Flat DiffServ which suworts per-subscriber DiffServ QoS and Structured DiffServ which supports per-subscriber and per-service DiffServ QoS. And the dynamic DiffServ models include Direct DiffServ for P2P(Peer to Peer) applications and Indirect DiffServ for ASP(Application Service Provider) applications.

• Journal of the Korean Society of Child Welfare
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• no.59
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• pp.115-150
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• 2017

The purpose of this study was to examine the current status of the Dream Start program from the perspective of social investment strategy, and as well as to suggest future directions. The program has become a major government welfare program in korea since it was introduced in 2007 as a demonstration project, following research evidence and a sound rationale about the extensive success of Head Start in the U.S. and Sure Start Programme in the UK. The aim of Dream Start is to provide integrated services for the vulnerable children, aged 0 to 12, and their families who are identified using a national administration data record of disadvantaged families with children. In order to promote the vulnerable child's well-being, to overcome inequalities, and to give every child the best start in life, Dream Start adopted a local, "whole family" approach. Case management services form an essential part of the Dream Start to customize and integrate comprehensive services such as counseling, health care, parenting advice and education, academic tutoring, and after-school activities. Although there has been a general improvement in key factors since its inception, Dream Start has not yet sufficiently shown the strong and hoped-for impact. In the meantime, Dream Start must be given financial expansion and extensive policy supports to get the chance of realizing and evaluating long-term gains for children and their families. More work need to be done to overcome inequalities and to make Dream Start service more accessible for the most disadvantaged families with children in Korea. Practical and policy suggestions for future directions of the Dream Start programs were discussed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.11
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• pp.509-525
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• 2017

This study analyzed a unique method of problem-handling, attitudes, and specific interest propensity in the career path of the type with inconsistency in the relative distance between personality type in Holland's hexagonal model. In-depth interviews and theme analysis with six clients who showed inconsistent personality type were conducted. These six were selected from 87 participants that had received training at the Korea Vocational Counselling Association, Korea Training Institute for Self-Sufficiency and Korea Employment Agency for the Disabled. From the analysis, the six clients with inconsistent 3 Codes showed four characteristics - more than three career experience, various interest pursuits, career involvement, and career identity. They were affected in their vocational behavior by their own Holland 3 Codes and showed vocational behavior very different from Holland's theory of person-environment fit approach. They showed positive, ambivalent and chaotic types on career identity. Furthermore, Conventional(C)-Investigative(I)-Social(S) 3 Codes type and Artistic(A)-Enterprising(E)-Realistic(R) 3 Codes type in the same inconsistent personality type showed different vocational behaviors in career path development, which relates to the meaning of Holland's 3 Codes. The significance of this research lies in its provision of various points for improving career counselling.

• Journal of Korean Library and Information Science Society
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• v.38 no.2
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• pp.13-30
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• 2007

The purpose of this study was to explore the role orientation that librarians are expected to carry during their career-life. More specifically, this study examined the pattern of librarians subjectivism related to attitude, belief, and confidence. Q questions were made of 36 items, including personal value system and role attitude. P sample included 23 librarians. Data were collected for 8 days (from April 15, 2005 to April 22, 2005). Analyses showed the following results. First, librarians role orientations were classified into 3 types: user-centered orientation, organization-centered orientation, and expertise-centered orientation. (1) The first type librarians were interested in having good relationships with users, while emphasizing the importance of providing good services to the users. (2) The second type of librarians were concerned with social function of the library, while placing highlight on their roles as organizational members. Among them, achievement evaluation was regarded as an important indicator of personal success. They were interested in having stable organizational culture, as well as economic growth of libraries. This orientation was dominant among married members. (3) The third type of librarians focused on librarians role implementation and professional achievement. They showed interest not only in the improvement of librarians creativity and the growth of expertises, but also the expansion of retraining opportunities. This orientation was conspicuous among female librarians. Second, several commonalities and differences were consistently found among librarians. The first type was interested in user-centered orientation(user contact, need satisfaction, self dignity, etc.). The second type was interested in organization-centered orientation(creativity, expertise growth, retraining opportunity, professional achievement. self-respect, etc.).