• Journal of Forest and Environmental Science
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• 제33권4호
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• pp.305-314
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• 2017

This study aimed to predict changes in forest area using a probability density function, in order to promote effective forest management in the area north of the civilian control line (known as the Minbuk area) in Korea. Time series analysis (2010 and 2016) of forest area using land cover maps and accessibility expressed by distance covariates (distance from buildings, roads, and civilian control line) was applied to a probability density function. In order to estimate the probability density function, mean and variance were calculated using three methods: area weight (AW), area rate weight (ARW), and sample area change rate weight (SRW). Forest area increases in regions with lower accessibility (i.e., greater distance) from buildings and roads, but no relationship with accessibility from the civilian control line was found. Estimation of forest area change using different distance covariates shows that SRW using distance from buildings provides the most accurate estimation, with around 0.98-fold difference from actual forest area change, and performs well in a Chi-Square test. Furthermore, estimation of forest area until 2028 using SRW and distance from buildings most closely replicates patterns of actual forest area changes, suggesting that estimation of future change could be possible using this method. The method allows investigation of the current status of land cover in the Minbuk area, as well as predictions of future changes in forest area that could be utilized in forest management planning and policymaking in the northern area.

• 한국통신학회논문지
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• 제30권10B호
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• pp.639-647
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• 2005

WPAN에서는 망 중재를 위하여 하나의 피코넷 코디네이터(Piconet Coordinator; PNC)가 요구되는데, 이러한 코디네이터는 망을 구성하는 디바이스들 중에서 선발된다. 그리고 선발된 PNC가 피코넷을 이탈하거나 운영을 중지할 때 또는 현재의 PNC보다 더 능력이 우수한 디바이스가 피코넷에 참여할 때 PNC 핸드오버(Handover) 과정을 통하여 신규 PNC로 PNC역할이 이양된다. 고속 WPAN 표준화 권고안(IEEE 802.15.3)에서는 PNC 핸드오버를 위해 신규 PNC를 선발할 때 디바이스의 규격과 관련된 능력(Device Capability) 정보요소 (Information Element; IE)만을 기준으로 제시하고 있다. 본 논문에서는 PNC 후보를 선발할 때 고려해야 하는 정보요소로 통신가능성(Accessibility)을 살펴보고, 제시한 통신가능성 정보요소를 고려한 PNC 선택 방법을 제안하였다. 제안하는 PNC 선택 방법은 피코넷에 참여중인 디바이스들을 최대한 상속함으로써 보다 효과적인 피코넷 운영관리가 가능하며, 유지하고 있는 PNC 후보 목록을 이용하여 기존의 PNC가 긴급하게 피코넷에서 이탈하는 경우에 PNC 선택 과정 없이 PNC 후보 목록 중에 우선 순위가 가장 높은 디바이스에게 PNC 핸드오버를 실시할 수 있으므로 긴급한 경우에 효과적인 대처가 가능한 장점이 있다.

• 한국멀티미디어학회논문지
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• 제21권11호
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• pp.1342-1352
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• 2018

Voice Command systems are important means of ensuring accessibility to digital devices for use in situations where both hands are not free or for people with disabilities. Interests in services using speech recognition technology have been increasing. In this study, we developed a mobile writing application using voice recognition and voice command technology which helps people create and edit documents easily. This application is characterized by the minimization of the touch on the screen and the writing of memo by voice. We have systematically designed a mode to distinguish voice writing and voice command so that the writing and execution system can be used simultaneously in one voice interface. It provides a shortcut function that can control the cursor by voice, which makes document editing as convenient as possible. This allows people to conveniently access writing applications by voice under both physical and environmental constraints.

• 아태비즈니스연구
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• 제11권1호
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• pp.1-16
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• 2020

Purpose - The purpose of this research is to investigate the determinants of bakery revisit intention. This research selects Paris Baguette as the research context because the market share of Paris Baguette was the highest in Korean bakery market. Design/methodology/approach -This research employed revisit intention as the dependent variable, while this research chooses six attributes to account for revisit intention. Six attributes are price fairness, taste, product variety, accessibility, display, and membership. This research uses survey as the main instrument. For the data collection, online survey using Google survey form was implemented. The survey participants are domestic consumers of Paris Baguette. The number of observation is 245. For the data analysis, this study used frequency analysis, correlation matrix, exploratory factor analysis, reliability analysis, and multiple regression model. There are four control variables, which contains age, gender, visiting frequency, and monthly income. Findings - The results shows that price fairness, taste, product diversity, and accessibility are significant attributes with the positive effect. Among the significant attributes, taste presented the highest magnitude to explain the revisit intention. However, membership and display appeared as non-significant attributes to account for bakery revisit intention. Research implications or Originality - This study provides the bakery managers with the information to design their service and product. This study also contributes to the literature by understanding the consumer behavior more in the domain of bakery service.

• 한국멀티미디어학회논문지
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• 제22권11호
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• pp.1215-1222
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• 2019

Recently, people with disabilities also search for and collect information from the web through smart devices, and save collected information on smart devices or take notes. For non-disabled people, various memo applications are provided on the market, so it is more convenient to choose according to their preference. However, existing memo services are limited for use by blind people due to the importance of visual information. The problem with blind people when using smart devices is that the screen is not recognized, so it is not possible to check in which location the menu of the application exists. In addition, it is difficult to input and manipulate text, and systematic file management and control are not possible. Therefore, in this paper, we propose the development of voice memo service that blind people can use only voice and hearing information and can operate menu with Bluetooth remote controller. We will develop a system that includes a comprehensive voice file management function for storing, searching, playing, and deleting files, rather than simply storing voice files.

• 여성건강간호학회지
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• 제12권2호
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• pp.124-131
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• 2006

Purpose: The purpose of this study was to examine the perceptions regarding the use of Emergency Contraceptive Pills (ECPs) among young Korean women. Method: The study included 14 unmarried women aged 19 to 34 years (mean, 25 years). Data was collected by focus group interviews and an in-depth interview from July to November, 2005. Content analysis was conducted. Result: The four major themes that emerged were control of accessibility, safety concern, lack of knowledge and information, and ambivalence. Control of accessibility: Most of the participants stated a prescription is necessary although they might feel ashamed if they had to ask for an ECP. Safety concerns: Participants thought that taking an ECP would be harmful to their body. Lack of knowledge and information: Most of the participants felt that they did not know enough about ECPs and were willing to learn more. Ambivalence: The participants stated that they would take an ECP when needed and would recommend it to a friend although they were concerned about the risks of ECPs. Conclusion: The results from this study suggest the need for an educational and awareness program to empower women to be able to make informed decisions on ECPs when needed.

• 한국멀티미디어학회논문지
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• 제24권7호
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• pp.903-912
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• 2021

Eye tracking research for upper limb disabilities is showing an effect in the aspect of device control. However, the reality is that it is not enough to perform web interaction with only eye tracking technology. In the Eye-Voice interface, a previous study, in order to solve the problem that the existing gaze tracking interfaces cause a malfunction of pointer execution, a gaze tracking interface supplemented with a voice command was proposed. In addition, the reduction of the malfunction rate of the pointer was confirmed through a comparison experiment with the existing interface. In this process, the difficulty of pointing due to the small size of the execution object in the web environment was identified as another important problem of malfunction. In this study, we propose an auto-magnification interface of objects so that people with upper extremities can freely click web contents by improving the problem that it was difficult to point and execute due to the high density of execution objects and their arrangements in web pages.

• 한국정보통신학회논문지
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• 제14권9호
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• pp.2150-2156
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• 2010

본 논문에서는 효율적이고 효과적인 정보 흐름을 가능하게 해주는 네트워크와 네트워크의 잠재력에 집중하고자 한다. 네트워크 중심 환경하에서 운용되는 군 지휘 통제 시스템을 포함하는 모든 네트워크들은 복잡하게 얽혀있다. 따라서 복잡도의 특성을 이해하고, 그에 따른 효과는 무엇이며, 어떻게 측정할 수 있을지에 대해서 알아본다. 우리는 정보의 접근성에 의한 효과와 네트워크화에 기반하는 중복성에 의한 효과에 대해서 결과를 제시하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권11호
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• pp.2254-2271
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• 2011

Access control in dynamic environments needs the ability to provide more access opportunities of information to users, while also ensuring protection information from malicious users. Trust and risk are essential factors and can be combined together in access control decision-making to meet the above requirement. In this paper, we propose the combination of the trust and risk in access control to balance information accessibility and protection. Access control decision is made on the basis of trustworthiness of users and risk value of permissions. We use potential relations between users and relations between permissions in access control. Our approach not only provides more access opportunities for trustworthy users in accessing permissions, but also enforces traditional access control constraints such as Chinese Wall policy and Separation of Duty (SoD) of Role-Based Access Control (RBAC) model in an effective way.

• 제어로봇시스템학회논문지
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• 제9권3호
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• pp.196-203
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• 2003

Recent increase in accessibility to the internet makes it easy to use the internet-connected devices. The internet could allow any user can reach and command any device that is connected to the network. But these teleoperation systems using the internet connected device have several problems such as the network time delay, data loss and development cost of an application for the communication with each other. One feasible solution is to use local and external network line for the network time delay, transmission control protocol for data loss and Java language to reduce the development period and cost. In this study, web-based remote control system using Java language is newly proposed and implemented to a pneumatic servo control system to solve the time delay, data loss and development cost. We have conducted several experiments using pneumatic rodless cylinder through the internet and verified that the proposed remote control system was very effective.