• 한국실내디자인학회논문집
• /
• 제13권4호
• /
• pp.147-155
• /
• 2004

The purpose of this research is to improve exhibition effectiveness by implementing hands-on exhibition technique that best provides adults with cultural resting place and children with outdoor education which simply supports school curriculum. By completing this research, the museum of natural history will become defined innovative as a place that enables people actively develop creativity For this sake, some of domestic natural science museums were selected as the samples in this study, such as Seodaemun of Natural History, Incheon Standing Science Pavilion and Daejeon National Science Museum, Which all produce experience-based exhibition in relatively brisk manner. First of all, this study attempted to identify the traffic line and behavioral characteristics of spectators who used experience-oriented exhibition through follow-up and observational study Then it divided samples into adults and children group to compare and analyze the ratio of using exhibitions, the ratio of spectators and the sojourn time according to the type of experience-oriented exhibitions. In addition, this study attempted to collect available data about spectators who were in conversation with one another on the other hand, it also attempted to determine any effects on using experience-based exhibition by performing a questionnaire survey, so that it might set up an index for behavioral characteristics the spectators who visit such exhibition.

• 한국통신학회논문지
• /
• 제37권1B호
• /
• pp.9-14
• /
• 2012

밀리미터파 대역에서의 이웃장치 탐지는 이 대역의 통신에서의 필수 선제조건이므로 아주 중요하고 또한 긴급한 문제이다. 본 논문에서는 모든 장치에 지향성 안테나가 탑재되어 있는 경우 밀리미터파 대역 개인영역 무선네트워크에서 지향성 안테나의 효과를 기반으로 한 동기식, direct, two-way 지향성 이웃장치 탐지과정을 분석한다. 주어진 시간동안 발견되는 장치의 비율과 한 방향에서 머무르는 최적의 시간 등과 같은 측도를 수학적으로 표현하였다. IEEE 802.15.3c 표준을 기반으로 한 분석결과는 지향성 안테나를 사용하는 경우의 이웃장치 탐지의 효율성을 보여준다. 본 연구는 밀리미터파 대역에서 이웃장치 탐지에 관한 이론적 기반을 제공할 것으로 보인다.

• 산업경영시스템학회지
• /
• 제14권24호
• /
• pp.149-154
• /
• 1991

The one of the important problems in the design of queueing systems is the decision of the order of service stations. The object of this problem is the decision of the order that minimizes the expected sojourn time per customer in the given arrival process and service time distributions. In this paper, the tandem queueing system in series is studied with the emphasis on the optimal order of the tandem queueing system which has three stations with single servers. In one system, customers arrive at the first station with Poisson process. This system is composed of service stations with a constant, a general distribution and a Exponential distribution is studied. To select the optimal order after the orders of each pair of two stations is decided, it is compared the two orders of system. With this results, total expected delay of the systems which has three stations is compared. The result is the best that service station with constant time is on the first place, then the service station with general distribution and the service station with Exponential distribution is followed. And the other system is consist of service stations with a constant and two probabilistic distributions. In this case, two probabilistic distributions has a non-overlapping feature. It is the optimal order that the service station with constant time is on the first place then the service station with longer service time and the service station with shorter service time is followed.

• 한국농촌건축학회논문집
• /
• 제10권1호
• /
• pp.1-9
• /
• 2008

The purpose of this study is to investigate and analyse the opinions of tourists and local commercial residents for remodelling of Youngwol Gossi-cave area so that to find the way how to activate it. Therefore this study has been focused on the opinions of tourists to visit it, local merchants to sell goods and foods and officers to take charge of the control office. The present conditions of Gossi-cave area are stagnated since the service level is low by the excessive competition among the local merchants. As a result, the inner troubles have arisen among the local merchants. Therefore firstly the sustainable and future-oriented remodelling development of Youngwol Gossi-Cave area is required. And then the basic remodelling plan of participant type to be centered with tourists and local residents as the central figures through local residents' ability strengthening must be established. Lastly the basic remodelling plan through the connection of surrounding tour resources and the resource increase of local amenities must be established. Also it is necessary for the conversion as a tour place of sojourn by supplying with various shows through connections among surrounding tour resources worthy of seeing and the creation of concept to provide the excitement through the education and experience in a basic remodelling plan direction of Youngwol Gossi-cave area.

• 한국실내디자인학회논문집
• /
• 제21권5호
• /
• pp.65-76
• /
• 2012

The purpose of this study is to grasp the spatial characteristics and consciousness structure for The Third Place through the empirical research, focused on housewives as the survey who spend many times in neighborhood. The four types as the consciousness structure are deducted, Nature-oriented type, Unusual experience type, Solitude enjoyment type, and Originality-oriented type. And the spatial characteristics related to the four types are deducted as the followings: Nature-oriented type contains the spatial characteristics as Wild space, Speculative space, Dotty occupation space, and Green way. Unusual experience type contains as Rambling space, Dynamic sojourn space, and Theme-plex space. Solitude enjoyment type contains as Anonymous private space, Encircling space, and Religious space. Originality-oriented type contains as Chatter space, Self development space, and Community space between families. The results of this study represent six characteristics on the third place, advocated by Oldenburg, and show housewives' various needs and concrete examples for the Third place in city.

• Journal of Information Processing Systems
• /
• 제1권1호
• /
• pp.62-69
• /
• 2005

This paper presents a queuing analysis model of a PC-based software router supporting IPv6-IPv4 translation for residential gateway. The proposed models are M/G/1/K or MMPP-2/G/1/K by arrival process of the software PC router. M/G/1/K is a model of normal traffic and MMPP-2/G/1/K is a model of burst traffic. In M/G/1/K, the arriving process is assumed to be a Poisson process, which is independent and identically distributed. In MMPP-2/G/1/K, the arriving process is assumed to be two-state Markov Modulated Poisson Process (MMPP) which is changed from one state to another state with intensity. The service time distribution is general distribution and the service discipline of the server is processor sharing. Also, the total number of packets that can be processed at one time is limited to K. We obtain performance metrics of PC-based software router for residential gateway such as system sojourn time blocking probability and throughput based on the proposed model. Compared to other models, our model is simpler and it is easier to estimate model parameters. Validation results show that the model estimates the performance of the target system.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제13권7호
• /
• pp.3470-3493
• /
• 2019

IEEE 802.11s-based infrastructure Wireless Mesh Networks (iWMNs) are envisaged as a promising solution to provide ubiquitous wireless Internet access. The limited network capacity is a problem mainly caused by the medium contention between mesh users and the mesh access points (MAPs), which gets worst when the mesh clients employ the Transmission Control Protocol (TCP). To mitigate this problem, we use wireless network coding (WNC) in the MAPs. The aim of this proposal is to take advantage of the network topology around the MAPs, to alleviate the contention and maximize the use of the network capacity. We evaluate WNC when is used in MAPs. We model the formation of coding opportunities and, using computer simulations, we evaluate the formation of such coding opportunities. The results show that as the users density grows, the coding opportunities increase up to 70%; however, at the same time, the coding delay increments significantly. In order to reduce such delay, we propose to adaptively adjust the time that a packet can wait to catch a coding opportunity in an MAP. We assess the performance of moving-average estimation methods to forecast this adaptive sojourn time. We show that using moving-average estimation methods can significantly decrease the coding delay since they consider the traffic density conditions.

• 한국환경복원기술학회지
• /
• 제13권3호
• /
• pp.143-151
• /
• 2010

This study was carried out to use efficiently forest resources through the survey of analysis of consciousness for the application of other use following quarrying. The application types of other use following quarrying were 366 people (49.5%) for forest recreation, 164 people (22.2%) for facility application, 117 people (15.8%) for vacation facility, and 93 people (12.6%) for tree planting types. According to the test of independence between facility utility types and gender, male preferred the leisure facility type, but female preferred the forest recreation type. The tree planting type was not related to the gender, but male preferred facility application types. Also, female preferred a static use type such as recreation and walking, while male preferred a dynamic use type such as the leisure and facility application types. According to the test of independence between facility application and occupation types students and company employees preferred the leisure facility type, while school faculty and staff, self employees, and housewives preferred the forest recreation type. Public servants preferred tree planting and facility application types. The sojourn time was the overnight and 6-8 hours in the leisure facility type, within 4 hours in the forest recreation and tree planting types, and 6-8 hours in the facility application types. Other use plans of the quarry site following quarrying will be needed to establish quarry facility application models with consideration for visitor's preferences.

• 보건교육건강증진학회지
• /
• 제23권5호
• /
• pp.47-73
• /
• 2006

Objectives: This study aims to identify gaps between knowledge regarding migration and the spread of HIV/AIDS, to improve understanding of migrants with HIV/AIDS and their human rights, and to make suggestions for Korean policy makers to reform laws and policies towards granting migrants with HIV/AIDS more human rights and access to treatment and care. Methods: This study is based on an extensive literature review, questionnaire surveys and in-depth interviews from randomly selected 8 countries from 5 different continents: Japan from Asia; Australia from Oceania; Finland, Germany, Ireland and United Kingdom(UK) from Europe; and Canada and United States of America(USA) in North America. Results: This study has found that Korea has a discriminating policy regarding HIV/AIDS and foreigners. Classifying HIV/AIDS into a legal communicable disease, it requires a presentation of HIV/AIDS test results from foreigners wanting a long-term stay before entering. In principle, foreigners with HIV/AIDS cannot either enter or stay in Korea. If they are known infected with HIV/AIDS by any reason, they became to face an immediate deportation regardless of their sojourn statuses and purposes. Conclusion: With the results, this study suggests three reasons why Korean government needs to change the current HIV/AIDS policy on foreigners: 1) HIV-related travel restrictions have no public health justification, 2) its strict HIV/AIDS policy on foreigners could result in restriction on the mobility and migration of its people by the other countries, inversely, and 3) it needs to meet international guidelines and to observe conventions that international organizations suggest to maintain its status as a member of the international society.

• 한국정보통신학회논문지
• /
• 제13권1호
• /
• pp.67-74
• /
• 2009

본 논문에서는 이동통신 네트워크의 계층 셀 구조에서 음성호와 데이터호의 트래픽을 분산시킴으로서 서비스의 이용성을 개선시키는 방안을 제안한다. 계층 셀 구조의 트래픽 모델을 기술하고, 호 처리에 대한 성능 분석이 수행된다. 본 논문에서 제안된 호 처리 방식에서, 빠른 속도로 이동하는 호는 상위 계층 셀로 이동하여 서비스된다. 오버플로우가 발생하는 경 우에도 호는 상위 계층으로 이동한다. 다른 방식들과 달리, 오버플로우가 발생되어 상위 계층으로 이동한 호는 하위 계층에서 가장 오래 동안 서비스된 호이다. 오버플로우가 발생하여 상위 계층 셀로 이동된 호가 일정시간 이상상위 계층에서 서비스되면, 상위 계층 셀의 한정된 자원을 절약하기 위해 하위 계층으로 호를 이동시킨다. 제안된 방식의 호 처리 성능분석을 위해 M/M/C/K모델을 이용하여 평가하고, 호 블록킹 확률과 강제종료 확률이 개선됨을 보여준다.