• The Journal of the Korea Contents Association
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• v.21 no.11
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• pp.193-202
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• 2021

Barrier-free is defined as inclusive design of built environments such as building and its facilities that can be approached, entered and used by persons with disabilities. The purpose of this paper develops the content that can identify the physical barriers in the way of movement and provide information associated with barrier-free by using both Geospatial Information and Virtual Reality technology. For this, we conducted literature reviews to find the tackling barriers in terms of barrier-free access and extracted main functions to construct the content. Then, the prototype model which composed of VR engine and 3D geospatial data was implemented, and finally the utilization of the prototype was checked in accordance with barrier-free scenario. The developed prototype model of this study would be contributed to design the barrier-free of public places and access to public buildings for the mobility-disabled people.

• Journal of the Korean Society for Library and Information Science
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• v.44 no.3
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• pp.137-154
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• 2010

The purpose of this study is to examine the tendency of open access income models in gratis open access journals and fee-based online journals in Korea. This study found that there was no clear difference between two groups and fee-based online journals had several of the same characteristics of open access journals. That is, the societies published fee-based journals have requested APC to authors and additional page charges for the articles with research funding. Also, in case of fee-based online journals, the journals received subsidies from external funding agencies were more than free OA journals. These findings show that fee-based online journals in Korea have a lot of capability to transition to open access journals.

• Journal of Information Management
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• v.36 no.1
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• pp.1-32
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• 2005

The scholarly communication crisis is not a journals crisis, but rather a broader crisis in information communications. It is the loss of access to the scholarly research literature, as the rising cost of STM journal subscriptions far out-strip academic library budgets. Now, the open access as alternatives to traditional journal subscription model are emerging for STM scholarly information. There are basically three forms for OA strategies : Open Access Journals(OAJ), Author Self Archiving(ASA), Academic Institutional Repositories(AIR). This paper describes the current trends and analyses potentially serious limitations and obstacles or various issues of the OA strategies, including the notion of scholarly information as a public good, myths of free access, author pay model, holder of copyright, etc.

• Journal of the Korean Society for information Management
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• v.27 no.4
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• pp.89-107
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• 2010

Open access journal has been one of the major academic information sources for researcherscharacterizing itself as free resource. Recently, as competition among academic information service provides becomes intense, open access journal also needs to enhance its service and expand information service function. This study aims to propose service features for next generation service of open access journals by analyzing service features of leading journal database services. As a result, four service features are suggested such as journal article components and multimedia features, expanded searching features, social service features and mobile information service.

• Journal of the Korean Society for information Management
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• v.28 no.4
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• pp.183-200
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• 2011

This study surveyed editors of 309 gratis open access journals in Korea in order to examine the reason why they decided to open their journals to the public on the Web. Also this study examined their perceptions and attitudes toward open access publishing. The main reasons of open access publishing in Korea were expansion of free use, increasing citation, and international trends regarding open access in their scholarly fields. Also, 65% of all respondents were aware of the concepts of open access, and 75% supported open access. The reasons of supporting open access were sharing of research results with the public, increasing the availability of peer researchers, and enhancing journal reputations.

• Journal of information and communication convergence engineering
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• v.11 no.2
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• pp.82-94
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• 2013

In this paper, we propose a novel tunnel-free scheme in a proxy mobile IPv6 (PMIPv6)-based nested network mobility environment; several mobile nodes (MNs) and mobile routers (MRs) compose a hierarchical wireless network topology. Because tunnels created by several MRs overlap and data packets travel along several local mobility anchors (LMAs), the utilization of the wireless section is reduced and the packet forwarding path of the wire-line section is not optimal. In our tunnel-free scheme, the mobile access gateway (MAG) plays an important role in both the wireless and wire-line sections. Using a local binding update, this tunnel-free scheme forwards data packets with a host-based routing table without any tunnel. Establishing a direct tunnel between the MAG and the last LMA, this scheme removes nested tunnels between intermediate LMAs and MRs, and optimizes the forwarding path to the MN in the wire-line section.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.5 no.1
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• pp.123-140
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• 2011

In this paper, we propose an Energy Efficient Media Access Control (EE-MAC) protocol for wireless sensor networks. The proposed scheme is designed to save power consumption and guarantee quality-of-service for real-time traffic. EE-MAC uses the superframe structure which is bounded by the transmission of a beacon frame and can have an active and an inactive portion. The active period is divided into the contention free period (CFP) for real-time traffic transmission and the contention access period (CAP) for non-real-time traffic transmission. We propose the exclusively allocated backoff scheme which assigns a unique backoff time value to each real-time node based on bandwidth allocation and admission control. This scheme can avoid collision between real-time nodes by controlling distributed fashion and take effect a statistical time division multiple access. We also propose the algorithm to change the duty cycle adaptively according to channel utilization of media depending on network traffic load. This algorithm can prolong network lifetime by reducing the amount of energy wasted on idle listening.

• Journal of Information Management
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• v.39 no.4
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• pp.1-20
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• 2008

The purpose of this study is to scrutinize the copyright issue under Open Access environment. A survey has been carried out to investigate researchers' awareness and recognitions about such issues. For this, bioinformatics researchers were selected and surveyed. Descriptive statistics method is employed for analysis of collected data. The findings of this study summarized as follow. (1) Although the researchers regarded the Open Access a positive initiative, the perceptions about open access were very low. (2) The researchers demanded possession of copyright depending on type of research information. (3) Many agencies did not required the transfer of copyright to the researcher. Thus, there is a possibility of dispute regarding copyright issues between researchers and agencies. (4) The researchers are willing to participate in open access activity on the assumption that their study is used in legitimate objective. On the basis of these findings, suggestions are added in as an impetus to lower the barrier against a copyright and higher the approach to information seekers and information providers.

• International journal of advanced smart convergence
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• v.9 no.3
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• pp.260-271
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• 2020

Smartphones provide blind users with screenreader as an accessibility tool. However, blind users often experience difficulties accessing online shopping malls via smartphones due to their inconsistent and image-based layouts. To enable screenreader users to get access to the detailed information about products while they are shopping online, we have developed BarrierFreeShop, an accessible mobile shopping application for people with visual impairments. BarrierFreeShop has three accessibility features: (1) layout automation, (2) review summarization, and (3) optical character recognition. We conducted a user study with 80 participants with visual impairments where they were asked to use BarrierFreeShop for a month. The findings revealed the effectiveness of our app in terms of speed and post interview feedback. We have also discovered typical shopping experiences that participants had during the test. This research suggests that computer vision technologies can improve accessibility issues in online shopping malls. In addition, we have confirmed that extracting contents from images help people with visual impairments to get better access to product information.

• Journal of Korea Multimedia Society
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• v.10 no.12
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• pp.1612-1621
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• 2007

In this paper, we introduced our designed TDMA (Time Division Multiple Access) based MAC (Medium Access Control) protocol for Home Networks called HomeTDMA. We have implemented and tested it in a test bed using crossbow motes and TinyOS. We also have compared HomeTDMA and CSMA (Carrier Sense Multiple Access) in terms of space and time complexity, channel access time, delivery success ratio, and throughput. Based on our results, HomeTDMA has an advantage over CSMA on channel access time, throughput and delivery success ratioIn the case of complexity, HomeTDMA is more complex compared to CSMA. Thus, CSMA is more appropriate in wireless sensor networks (WSNs) where memory, energy, and throughput are important parameters to be considered. However, HomeTDMA has a natural advantage of collision free medium access and is very promising for home networks where a reliable transmission or data transfer and congestion control is highly preferred.