• Journal of the Korean Institute of Rural Architecture
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• v.22 no.3
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• pp.49-60
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• 2020

The purpose of this study utilizes the service design methodology centered on the lives and experiences of rural residents, who are the main beneficiaries of the service, to derive specific problems and needs, and to propose a service improvement plan suitable for the rural residential environment. The study selected Dosan 2-ri Village, Hongseong-gun, Chungcheongnam-do as the target of the survey, used personas and Customer Journey map of service design method to derive specific core issues and insights from the village residents. By developing this, the final five service directions for 'Air care service', 'Self-driving garbage collection and treatment service', 'Emergency/disaster networking service', 'Contaminant removal service' and 'Mobility share service' were derived and presented according to each key keyword. This study is not just a study to grasp the actual conditions of the rural residential environment, but it focuses on the lives and experiences of rural residents and extracts elements that can respond to changes in the lifestyles and patterns of the residents. It can be used as a basic material for more realistic improvement of rural residential environment and service development research. Most of the existing studies on residential environments and spaces is focused on urban areas, and there is a limit to the use of rural areas in residential areas. Therefore, by making recommendations for improvement of residential environment services suitable for rural areas and by creating residential spaces and environments in rural areas in a comfortable and safe manner, it is thought that it is possible to contribute to improvement of satisfaction in rural areas and improvement of healthy housing welfare as well as to improvement of the quality of life of residents of rural areas.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.1
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• pp.52-57
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• 2016

We introduce a hybrid scheduling in a multi-path poor scattering full-duplex (FD) system, which consists of one multi-antenna FD base station and a large number of single-antenna half-duplex mobile stations. Our hybrid scheduling utilizes partial channel state information at the transmitter. In particular, unlike the conventional scheduling method using opportunistic transmission for both uplink and downlink, the proposed scheme combines a random transmit beamforming for downlink and a zero forcing beamforming for uplink. As our main result, via computer simulations, it is shown that the proposed scheme has a superior sum-rate performance than that of the conventional scheduling method beyond a certain signal-to-noise ratio regime.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.12
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• pp.4903-4907
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• 2014

Background: This study aimed to identify factors associated with women's decisions to attend cervical cancer screening and to explore those linked with intention to attend in the coming year and to continue regular screening. Materials and Methods: A community based case-control study was conducted among woman 30-60 years of age in catchment area of Chatapadung Contracting Medical Unit (CCMU), networking of Khon Kaen Center Hospital, Thailand. Self-administered questionnaires were used to collect data, and in-depth interviews were then performed to explore in greater detail. Results: There were 195 participants. Only one third (32.3 %) had been screened for cervical cancer within the past 5 years. Some 67.7% reported that they had not been screened because they had no abnormal symptoms, single marital status, and no children. Only 10.6% of those never had screening intent to be screened within the next 12 months. High family income (adjusted OR=2.16, 95%CI=1.13-4.14), good attitude towards a Pap test (OR=1.87, 95%CI=1.09-4.23), and having received a recommendation from health care providers were important factors associated with decisions to attend cervical cancer screening (OR=1.73, 95%CI=1.01-4.63). From in-depth interviews, there were five reasons of their decisions to attend cervical cancer screening including yearly check-up, postpartum check-up, having abnormal symptom, encouragement by health care providers, and request from workplace. Conclusions: High family income, good attitude towards a Pap test, and receiving proper recommendation by health care providers, were important factors associated with decision to have cervical cancer screening among women 30-60 years old. Trying to enhance these factors and reduce barriers regarding screening, may increase the coverage rate for cervical cancer screening in Thailand.

• Journal of KIISE:Information Networking
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• v.34 no.2
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• pp.88-99
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• 2007

P2P systems are distributed data sharing systems, and each node in them plays the role of client as well as server. There are several studies using Distributed Hash Table, such as Chord, CAN, Tapestry, Pastry, but these systems don't consider the physical latency, therefore they have a weakness of difficulty to guarantee stable performance. To improve this problem, we present the TP2P system. This system is a self-organizing hierarchical overlay system and it uses Chord routing mechanism for lookup data. This system is organized by several subnets, each subnet is organized by physically close nodes, and global network organized by all nodes. In each subnet, one node finds a data, it saves in a node in the subnet, therefore it has higher probability to reduce physical lookup latency than Chord system. And each node has global information of some nodes in its subnet, and it is used to lookup data, therefore the number of hops decrease about 25% as well as the physical lookup latecy are reduced.

• Journal of KIISE:Information Networking
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• v.36 no.6
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• pp.471-480
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• 2009

One of the principal impediments to the achievement of a scalable access control for a large number of subscribers in a public broadcast is to distribute key update messages reliably to all stateless receivers. However, in a public broadcast, the rekeying messages can be dropped or compromised during the transmission over an insecure broadcast channel, or transmitted to the receivers while it was off-line. In this study, we propose a novel group key management scheme that features a mechanism that allows the legitimate receivers to recover the current group key even if they lose key update messages for long-term sessions using short hint messages and member computation. The performance analysis result shows that the proposed scheme has advantages of the scalable and efficient rekeying compared with the previous reliable group key distribution schemes. The proposed key management scheme targets a conditional access system in a media broadcast where there is no feedback channel from receivers to the broadcasting station.

• YAKHAK HOEJI
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• v.57 no.3
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• pp.219-225
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• 2013

The Korean pharmacy education has introduced new curriculum since 2011. In the new curriculum, pharmacy students have been provided strenthen experimental education and clinical pharmacy has been more important than previous curriculum. Thus, faculties in the college of pharmacy should prepare the circumstances correlated with the changed curriculum. To accomplish successful setting, all faculty and practice experts must work together and need financial assisstant from the college. However, there are many different obstacles among 35 colleges of pharmacy in Korea. In order to narrow a gap among students and find the way to overcome it together, we studied the problem of preparation process in Korean colleges of Pharmacy. We studied the process of practical education in college of pharmacy by means of self-reporting questionnaire from November 29th 2012 to December 31th 2012. The questionaire comprised of syllabus related to clinical pharmacy, the number of professor in charge of clinical pharmacy or pharmacotherapeutics, the plan of securing faculties in the field of clinical pharmacy, the budget, site, instrument for preparing experimental education, the lesson time number of experimental education, MOU, education and treatment of preceptor in the practice site and committee of experimental education in the college. Total 21 of 35 colleges participated in this survey. They showed different composition of syllabus, budget, the circumstances of experimental education, the education and treatment of preceptor. Most colleges are unclear the site and preceptor of experimental education and they did not contract the MOU with the sites. 9 of 21 also did not have the committee of experimental education in the colleges. From 2013, some colleges of pharmacy start actual experimental education. Inadequete preparation and different quality of education can make student incomplete pharmacists, so it will be negative effect on public health. To overcome challenge and obtain desirable goal, funding/administrative assistant from the college and networking within 35 colleges of pharmacy are needed.

• The Korean Journal of Community Living Science
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• v.27 no.spc
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• pp.651-663
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• 2016

This study explores the background and the processes underpinning the educational reform movement based on local community. This educational community initiated the alternative education reform movement, which is referred to as the small school movement. A qualitative case study was implemented by collecting data from thirty articles, three focused interviews. This study drew out three key factors as the operation of educational community in regional area. First, it claimed a total of 30 papers related to the educational community for content analysis. Second, key words were derived in the local educational community context. They developed their own alternative educational programs, such as self-supportive meeting, season carnivals, community revitalization activities, and so on. Their focus was on finding out and establishing better educational relationships among the concerned communities. Third, the community continues to reinforce the internal rules and climate through meta-education, a process, in which education educates itself. As a result, they could enjoy substantial success in a visible educational community. This small school revival movement later grew into the new school movement. Furthermore, a variety of teachers, parents groups, and interested scholars have been engaged in the community movement through professional networking. This study suggests that the key innovator-initiated movement, which involves education reform, upgraded Korean education, and improved their own expertise and autonomy, is expected to be the first step to solve the current Korean educational problems by the educational community.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.42 no.11
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• pp.27-34
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• 2005

Mobile Ad Hoc Networks (MANETs) are self-organized networks that do not rely in their operation on wired infrastructure. As in any networking technology, security is an essential element in MANET as well, for proliferation of this type of networks. But supporting secure communication in MANETs proved to be a significant challenge, mainly due to the fact that the set of nodes in the network can change frequently and rapidly and due to the lack of access to the wired infrastructure. In particular, the trust model and the authentication protocols, which were developed for wired and infrastructure-based networks, cannot be used in MANETs. In this paper, we address the problem of efficient authentication of distributed mobile users in geographically large networks. In particular, we propose a new authentication scheme for this case of MANETs. The proposed scheme exploits Randomized Groups to efficiently share authentication information among nodes that together implement the function of a distributive Certification Authority (CA). We then evaluate the performance of authentication using Randomized Groups.

• Journal of Digital Contents Society
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• v.7 no.2
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• pp.103-108
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• 2006

Short-range wireless communication and networking technologies are becoming increasingly important in enabling useful mobile applications. for example, ZigBee technology is expected to provide low cost and low power connectivity for equipment that needs battery life as long as several months to several years. In addition, ZigBee can be implemented in mesh networks larger than is possible with Bluetooth. The main features of this ZigBee standard are network flexibility, low cost, very low power consumption, and low data rate in an adhoc self-organizing network among fixed, portable and moving devices. Home network/Home automation is one of the key market areas for Zigbee, with an example of a simple network This paper investigates the effect of short range wireless channel on the performance of Zigbee system and DSSS-BPSK signal transmission in AWGN, interference and Rician fading environments. And we investigate performance degradation due to interference and fading effects in short range wireless channel. In particular, the impacts of the fading and interference level on the bit error probability is shown in BER performance figures.

• Journal of Fisheries and Marine Sciences Education
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• v.28 no.1
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• pp.34-46
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• 2016

This study analyzes inspection results of ships by Port State Control. Particularly, this research focuses on a detention trend of vessels that registered to Korean Register of Shipping. In order to conduct this research, we have searched 170 ships that got a detention with a Code-30 within recent 46 months period. The deficiencies of the detentions are inspected by ship types, ship years, flags, ports inspected, and criteria. Moreover, we categorized the deficiencies for the detentions into 17 types for internal and external inspections. As the results of the comparison study, bulk and general cargo carriers dominate the portion of detentions by almost 66 percent. Self-induced detention due to a lack of preparation by crews and company support are the main reasons of repeated detentions from the same type ships. Ships between six and ten years old show the lowest detention rate by 4 percent whereas ships less than five years old generate the highest detention rate by 22 percent. The main categories of the detentions from ships less than 5 years old are a lack of documentation and certification, and the clues support our opinion that owners and crews may neglect to prepare the inspections because their strong confidence for the ship condition due to young ship age. As a result of a great effort of Korean government and shipping companies to reduce a detention rate, the detention rate has been recently reduced to 0.3 percent. The results also require companies with the flag of convenience ships to spend more effort to reduce the detention rate, too. We expect that using social networking service by Korea Register will lower the detention rate by sharing relevant information real-time to ships and owners.