• 대한건축학회논문집:계획계
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• 제34권5호
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• pp.71-78
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• 2018

This study seeks to identify elements of spatial planning for areas surrounding children's parks in order to improve child safety. It will identify different aspects of child safety and extract elements of safety planning for the areas surrounding children's parks from a literature review of both domestic and international research. The study classifies the space between one's residence and the children's park as either a "means of access", such as pedestrian walkways and streets, or a "boundary", which consists of the entrance, exit, and fences; then, the derived safety planning elements were categorized in accordance with this classification. In order to ensure the validity of the planning elements, an expert survey was conducted of environment planners who specialize in the palnning and designing of residential area as well as government employees who are in direct charge of managing children's parks. The survey findings were as follow. First, the pedestrian walkway(means of access) near the park is the most crucial factor in regards to the safety of children, followed by the entrance and exit(boundary), fency(boundary), and streets (means of access), in descending order of importance. Thus, improving the safety of the pedestrian walkway should be considered first and foremost, and it should precede improving the surrounding streets. Second, an investigation of the need for safety devices near the children's park showed that securing visibility, through the installation of an illegal parking prevention device, is imperative. Illegal parking near children's parks poses a grave risk to pedestrian safety and demands immediate action. Furthermore, a section of streets within 300m of the park entrance should be designated as a children protection zone, in addition to the designation of school zones near elementary schools.

• 한국정보통신학회논문지
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• 제13권10호
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• pp.2030-2038
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• 2009

본 논문은 이동망 착신접속료에 대한 현재의 접속료 차등규제가 사회후생에 어떠한 영향력을 주는가를 분석 한다. 브랜드 충성도가 낮은 경우 서비스 대체성 수준과 관계없이 후발사업자의 착신접속료 증가는 사회후생을 감소시킨다. 브랜드 충성도가 높은 경우 후발사업자의 접속료가 증가함에 따라 사회후생은 증가한다. 모형을 확장하여 후발사업자의 비용이 기존사업자의 비용보다 큰 경우엔 브랜드 충성도가 증가함에 따라 사회후생 증가의 폭은 비용이 동일한 것에 비해 상대적으로 적다. 그러나 대체성이 증가함에 따라 사회후생의 감소폭은 더욱더 커진다. 후발사업자의 비용이 기존사업자의 비용보다 작은 경우엔, 전체적으로 브랜드 충성도가 증가함에 따라 사회후생의 증가폭은 더욱 커진다. 그러나 대체성이 증가함에 따라 사회후생의 감소폭은 비용이 동일할 때와 비교하면 줄어든다.

• 인터넷정보학회논문지
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• 제6권5호
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• pp.143-154
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• 2005

본 논문은 무선 엑세스 포인트를 기반으로 사용자가 광고 컨텐츠 수신을 통해 무선 네트워크 접속 서비스를 받을 수 있는 인터넷 접근형 광고 시스템에서 신뢰적 멀티캐스트 전송에 관한 것이다. 본 논문에서는 무선 LAN 환경에서 신뢰성 있는 멀티캐스트를 위해 네트워크 상태에 따라 이동단말기의 전송량을 조절하는 응용 계층 멀티캐스트 프로토콜을 제안한다. 인터넷 광고란 상품 또는 서비스의 판매나 인지도를 높이기 위하여 인터넷의 운용 프로그램이나 서비스 등을 광고 매체로 제공하는 광고 메시지를 통칭한다. 기존의 인터넷 광고 시스템들은 대부분 유선 환경의 불특정 다수를 대상으로 광고를 하며, 사용자의 웹브라우저를 광고 표현 매체로 하기 때문에 임의로 접근하는 사이트에 따라 노출 빈도가 매우 달라지는 수동적인 방법이다. 더욱이 사용자가 광고를 보아야 하는 필연적인 이유가 없으므로 광고가 사용자들에게 얼마나 효과적으로 노출될 수 있느냐 하는 문제점을 가지고 있다. 본 논문에 따른 인터넷 광고 시스템을 사용할 때, 사용자들은 무선 인터넷을 무료로 이용하고 광고주들은 사용자들에게 타겟 마케팅을 위한 지역적(현장성), 시간적(즉시성), 카테고리별(개인성) 타겟 광고를 하며, 네트워크 인프라 소유자는 기존 네트워크 인프라의 변경을 최소화하여 저비용으로 인터넷 광고 시스템을 운영할 수 있다.

• 대한인간공학회지
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• 제33권5호
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• pp.387-394
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• 2014

Objective: The purpose of this study is to survey trend and the real state of ageing population in UK, and its charge organizations, relevant policies and studies. Background: As in other countries, UK population is ageing and people aged 65 or over account for about 17% of population in UK. Considering this ageing population, there are varying basic studies and policies for older people in UK. Method: First, the author consulted ageing and its policies in UK with some faculties in an UK university. Next, based on the results of consultation, wide literature survey was conducted, which includes papers in relevant academic journals, publications and website surfing. Results: A number of basic studies for surveying status and characteristics of older people as well as simple population trend for them have been conducted in UK. Healthcare services are free for all UK residents, and varying social care services including equipment, home and residential cares, financial support, etc., are provided by local governments. Cost of social cares is means-tested and is not free for everyone. There are a number of governmental or non-profit organizations dedicated to help older people access social care services or to financially fund research projects older people. Conclusion: There are more basic studies, and healthcare and social care services for older people in UK, compared to Korea. Application: It would be useful as basic data for establishing effective polices for old people in Korea.

• 무역상무연구
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• 제59권
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• pp.137-157
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• 2013

The Electronic Trade Finance not only has with the trait which is simple procedures, low cost but also easier access to using statistics compare to formerly paper based system. In Korea, all of trade finance system will be changed to electronic base by February 2014. The purpose of this research finds the using status and problems of the electronic local L/C and electronic purchase certificate, and suggests several improvements. First, the whole trade finance system should improve in terms of simple procedures, especially small and medium companies can use the system sufficient maximum limit. Second, the organizers, KTNET, KITA etc, need to the new electronic trade finance system promote to customers and training program for early settlement. It also has to manage at an unified system between IT and tex authorities. Third, small and medium size companies still think the charge for using high, so it need to make a resonable charge for using the electronic system to persuasive extent reasonable about it.

• 한국통신학회논문지
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• 제34권1B호
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• pp.34-46
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• 2009

The remarkable growth of Korean telecommunication market has based on the introduction of competition as well as mobile technology like CDMA. It was well Down that such a conspicuous growth has been towed by mobile service rather than fixed telephone service. In telecommunications service the number of subscribers to mobile was over 40 millions in 2006 and also, while the traffic amount of fixed telephone has been more decreased, that of mobile, which already outnumbers the fixed, has been constantly increased and will be much more in future. It will accelerate the substitution of access and call demand of fixed service by mobile. This change of technology and demand does affect directly the market performance of telecommunications. And regulation has also an effect on market structure, which finally affects on market performance. In this paper we suppose the fixed and mobile telecommunications services are in a same industry. After reviewing the relations among the demand, cost, charge structure and revenue structure in the one fixed and mobile telecommunications market using the framework of an industrial structure analysis, we discuss the current issues of telecommunications regulation and implications for the future regulation.

• 정보처리학회논문지D
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• 제11D권1호
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• pp.143-152
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• 2004

최근에 객체지향 소프트웨어를 설계하거나 구현방법으로 EJB 기반의 소프트웨어 개발이 많이 이용되고 있다. 일반적으로 EJB 기반 어플리케이션에서는 데이터베이스를 이용한 영속적인 데이터를 사용하는 경우가 대부분이다. 본 논문에서는 서버 측 작성 프로그램 중 엔티티빈 클래스에서 담당하는 데이터베이스 엑세스에 관련된 부분을 J2EE의 DAO 패턴을 이용하여 클래스를 각각 분리하였다. 이는 기존의 패턴 방법과는 큰 차이는 없으나, 동일 패턴내의 공통의 클래스들을 합성이 가능하도록 설계하였다. 그리고 생성된 각각의 DBMS 클래스들은 다른 엔티티빈 클래스에서도 사용이 가능하게 할 뿐만 아니라 여러 DBMS 환경에서도 Data Source를 추가적인 프로그램의 변경이나 작성 없이 연동이 가능하도록 하고 있다.

• Journal of Computing Science and Engineering
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• 제7권4호
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• pp.231-241
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• 2013

Improvements in wireless sensor network (WSN) technology have resulted in a large number of applications. WSNs have been mainly used for monitoring applications, but they are also applicable to target tracking, health care, and monitoring with multimedia data. Nodes are generally deployed in environments where the exhausted batteries of sensor nodes are difficult to charge or replace. The primary goal of communication protocols in WSNs is to maximize energy efficiency in order to prolong network lifetime. In this paper, various medium access control (MAC) protocols for synchronous/asynchronous and single/multi-channel WSNs are investigated. Single-channel MAC protocols are categorized into synchronous and asynchronous approaches, and the advantages and disadvantages of each protocol are presented. The different features required in multi-channel WSNs compared to single-channel WSNs are also investigated, and surveys on multi-channel MAC protocols proposed for WSNs are provided. Then, existing broadcast schemes in such MAC protocols and efficient multi-hop broadcast protocols proposed for WSNs are provided. The limitations and challenges in many communication protocols according to this survey are pointed out, which will help future researches on the design of communication protocols for WSNs.

• Spatial Information Research
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• 제12권1호
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• pp.1-12
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• 2004

이 논문에 설계된 데이터제공자는 2차원과 3차원 공간 데이터 및 시간 데이터를 저장, 검색할 수 있도록 설계되었다. 데이터제공자 시스템은 이미 수집, 구축된 2차원 및 3차원 공간 데이터를 특정 지리정보시스템에 종속적인 형태로 수정하거나 변환해야하는 추가적인 작업을 생략할 수 있도록 표준 인터페이스를 제공한다. 이 시스템은 다양한 GIS 또는 소프트웨어들이 동일한 방법으로 3차원 공간 데이터와 시간 정보에 접근할 수 있도록 메타정보를 관리하고 데이터베이스와 연결하는 데이터제공자 컴포넌트와 데이터소비자를 위해 3차원 혹은 시간차원이 포함된 GIS 데이터에 대한 인덱스 관리와 공간 연산을 담당하는 데이터접근자 컴포넌트를 포함한다. 이 3차원 데이터제공자 시스템은 다양한 3차원 공간 연산과 분석기능을 제공한다.

• 한국농촌건축학회논문집
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• 제9권2호
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• pp.21-28
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• 2007

This thesis analyzed the uniqueness of a toilet plane structure, centering on a case of Beautiful Public Toilet Construction Project under a project by Chungcheongnam-do and drew a conclusion as followings. Most of public toilets, constructed under a project by Chungcheongnam-do, were located in remains, tourist resorts, parks, and the outskirts of traditional markets. They were constructed at the selected location within an easy access of most user and plane structure was also designed so that the persons, in charge of management and maintenance, and the users could use them without difficulty. But some public toilets didn't establish the handicaps' toilet or made them difficult to sue due to location or size. The plane structure style was various such as a rectangular, stream line, or circle in accordance with location or building size. A circle-styled toilet offered a good view but didn't offer a good access or an effective space for users. In addition, when a handicapped person enters a toilet, he or she has to enter or go out of it through a sliding dor. So a constructor has to make progress of a work in accordance with this point.