• Journal of the Institute of Electronics Engineers of Korea TC
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• v.45 no.8
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• pp.106-113
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• 2008

In this paper, we will design and substantiate the Network Traffic management system(MAGI), which makes up for the weak points of existing Network Monitoring tools and realize dynamic firewall; MRTG, ntop, ethereal, and nettest. The Network Traffic Monitoring and analyzing system differs from existing software-based Network Monitoring tools as MAGI is a combination of software and hardware. Not only the innovative web user interface applied to the software makes analyzing traffic simpler, but it also has a function for monitoring and managing conditions of the hardware. The web user interface implemented with PHP and MySQL helps to use the database and as a result, analyzing data becomes easier. On the hardware part, the appliance is configured as a bridge in a network. As a result, managed system does not have overload.

• Korean Journal of Childcare and Education
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• v.12 no.4
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• pp.23-40
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• 2016

The purposes of this study were 1) to examine the differences in job stress, teacher efficacy, emotion-focused coping strategies and depression of teachers in early childhood education and care according to their demographic backgrounds, 2) to investigate the influences of these variables on depression. 586 teachers in ECEC answered the questionnaires and the collected data were analyzed through frequence, percentages, Pearson's correlations, One-Way ANOVA, Bonferroni post hoc test, and stepwise regression using SPSS 21.0. The findings are as follows. First, job stress was significantly different according to ECEC teachers' ages and types of centers they were employed at teacher efficacy was significantly different according to their ages and education levels, emotion-focused coping strategies and depression were respectively significantly different according to ages, types of centers and education levels. Second, ECEC teachers' depression was influenced by undercontrolled expressionof emotion-focused coping strategies, home connection and promotion of positive learning environment of teacher efficacy, undercontrolled thinkingof emotion-focused coping strategies and work overload and job stress in order. These results imply that a support system and a policy should be established for ECEC teachers to express and understand their emotions in a positive way and related information should be provided to them through workshops.

• Korean Journal of Occupational Health Nursing
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• v.20 no.3
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• pp.250-260
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• 2011

Purpose: The purpose of this study was to describe the role experiences of occupational health nurse. The research question was "what are daily experiences in practice?" Methods: The data were collected through the focus-group interviews with nine occupational health nurses and analyzed by the grounded theory of Strauss and Corbin (1998). Results: The core category on occupational health nurse role experience was named as "struggling alone with the dual role". The causal conditions included 'unfamiliar area' and 'new work'. The contextual conditions included 'overload of work, 'tasks beyond OHN job' and 'disharmony with colleagues'. The intervening conditions were analyzed as supportive factors and discouraging factors. There were action/interaction strategies 'getting information about tasks', 'working as a professional', 'establishing a cooperative relationship', 'seeking help' by trying to regulate the phenomenon. Finally they succeed in 'establishing the identity' and 'feeling proud', but sometimes they could be 'suffering from low morale', or 'considering turnover'. Conclusion: Through these results, it can be explained that occupational health nurses have been exerting themselves to establish their role with various situation through the conflicted context. Based on the findings, we suggest developing the diverse continuing education programs to be tailored for OHN's needs and reinforcing the occupational health services under the legal and political support.

• Journal of Information Technology and Architecture
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• v.9 no.4
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• pp.455-464
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• 2012

Due to the recent data explosion, methods which can meet the requirement of large data analysis has been studying. This paper proposes MRIterativeBUC algorithm which enables efficient computation of large data cube by distributed parallel processing with MapReduce framework. MRIterativeBUC algorithm is developed for efficient iterative operation of the BUC method with MapReduce, and overcomes the limitations about the storage size and processing ability caused by large data cube computation. It employs the idea from the iceberg cube which computes only the interesting aspect of analysts and the distributed parallel process of cube computation by partitioning and sorting. Thus, it reduces data emission so that it can reduce network overload, processing amount on each node, and eventually the cube computation cost. The bottom-up cube computation and iterative algorithm using MapReduce, proposed in this paper, can be expanded in various way, and will make full use of many applications.

• Archives of design research
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• v.17 no.1
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• pp.253-264
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• 2004

The final goal of this research is development of graphic design evaluation methodology in elevation of a usability at the mobile internet services and of measurement model which can forecast user needs in interface design, and systemize evaluation basis. For this, we systemize core contents of GUI design evaluation methodology and embodied UI design support system that supports prototype layout and evaluation process directly. The sight language that can inform flow of controled information by the quick and implicated method so that user may complete task in a short time without overload of recognition in limited display environment of Small Screen device it must improve objectivity in the reflection of UI design with image. Thus evaluation methodology that can evaluate usability of mobile internet systematically is important and specially, graphic design evaluation model which can forecast user's design need and trend is meaningful because of special quality that can reflect sensitive aspect of user in interface design. Mobile internet GUI was done by the result of this design evaluation, and I hope this result can be utilized for the GUI development of Ubiquitous environment for the future research.

• Journal of Internet Computing and Services
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• v.10 no.2
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• pp.15-28
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• 2009

This paper proposes HWbF(Hit and WLC based Firewall) design which consists of an PFS(Packet Filter Station) and APS(Application Proxy Station). PFS is designed to reduce bottleneck and to prevent the transmission delay of them by distributing packets with PLB(Packet Load Balancing) module, and APS is designed to manage a proxy cash server by using PCSLB(Proxy Cash Server Load Balancing) module and to detect a DoS attack with packet traffic quantity. Therefore, the proposed HWbF in this paper prevents packet transmission delay that was a drawback in an existing Firewall, diminishes bottleneck, and then increases the processing speed of the packet. Also, as HWbF reduce the 50% and 25% of the respective DoS attack error detection rate(TCP) about average value and the fixed critical value to 38% and 17%. with the proposed expression by manipulating the critical value according to the packet traffic quantity, it not only improve the detection of DoS attack traffic but also diminishes the overload of a proxy cash server.

• Korean Medical Education Review
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• v.18 no.2
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• pp.51-57
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• 2016

This literature review explores artificial intelligence (AI) technology trends and IBM Watson health and medical references. This study explains how healthcare will be changed by the evolution of AI technology, and also summarizes key technologies in AI, specifically the technology of IBM Watson. We look at this issue from the perspective of 'information overload,' in that medical literature doubles every three years, with approximately 700,000 new scientific articles being published every year, in addition to the explosion of patient data. Estimates are also forecasting a shortage of oncologists, with the demand expected to grow by 42%. Due to this projected shortage, physicians won't likely be able to explore the best treatment options for patients in clinical trials. This issue can be addressed by the AI Watson motivation to solve healthcare industry issues. In addition, the Watson Oncology solution is reviewed from the end user interface point of view. This study also investigates global company platform business to explain how AI and machine learning technology are expanding in the market with use cases. It emphasizes ecosystem partner business models that can support startup and venture businesses including healthcare models. Finally, we identify a need for healthcare company partnerships to be reviewed from the aspect of solution transformation. AI and Watson will change a lot in the healthcare business. This study addresses what we need to prepare for AI, Cognitive Era those are understanding of AI innovation, Cloud Platform business, the importance of data sets, and needs for further enhancement in our knowledge base.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.18 no.9
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• pp.72-80
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• 2019

In this task, the tool dynamometer design and manufacture, and the Ansys S/W structural analysis program for tool attachment that satisfies the cutting force measurement requirements of the tool dynamometer system are used to determine the cutting force generated by metal cutting using 3-axis static structural analysis and the LabVIEW system. The cutting power in a cutting process using a milling tool for processing metals provides useful information for understanding the processing, optimization, tool status monitoring, and tool design. Thus, various methods of measuring cutting power have been proposed. The device consists of a strain-gauge-based sensor fitted to a new design force sensing element, which is then placed in a force reduction. The force-sensing element is designed as a symmetrical cross beam with four arms of a rectangular parallel line. Furthermore, data duplication is eliminated by the appropriate setting the strain gauge attachment position and the construction of a suitable Wheatstone full-bridge circuit. This device is intended for use with rotating spindles such as milling tools. Verification and machining tests were performed to determine the static and dynamic characteristics of the tool dynamometer. The verification tests were performed by analyzing the difference between strain data measured by weight and that derived by theoretical calculations. Processing test was performed by attaching a tool dynamometer to the MCT to analyze data generated by the measuring equipment during machining. To maintain high productivity and precision, the system monitors and suppresses process disturbances such as chatter vibration, imbalances, overload, collision, forced vibration due to tool failure, and excessive tool wear; additionally, a tool dynamometer with a high signal-to-noise ratio is provided.

• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.4
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• pp.445-450
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• 2018

AIS is the most important navigation equipment for the identification of other ships, etc. However, the AIS overload problem has been raised recently due to an increase in AIS equipped vessels. The government is planning to introduce the wireless LTE network at 100 km offshore as part of the SMART-Navigation project. Continuous development and dissemination of the services available through such platforms will be necessary to achieve major goals such as marine accident prevention and environmental protection. In this study, we applied a WAVE communication system, which could be the basis for the development of such services. As a result, reliable data transmission was confirmed for a range of communication of approx. 5 miles, although the service was limited to 1 km in road traffic. Therefore, it is expected that WAVE communication technology will be used to prevent marine accidents through such efforts as collision avoidance and the transfer of marine safety information between ships.

• Perspectives in Nursing Science
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• v.16 no.1
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• pp.1-11
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• 2019

Purpose: This study was conducted to identify the perceptions toward school forest programs related to forest welfare services in elementary schools and suggest strategies to activate new programs. Methods: A mixed method research was performed. Four teachers and one forest therapist participated in a focus group interview; 162 teachers answered a survey. Results: The teachers were aware of the effects of the forest program, but there were some barriers, including the question of whether there was an accessible forest, school forest management problems, the risk of teachers' work overload, and the lack of program diversification for elementary students. Solutions included the expansion of school forests and forest facilities available to students, development of a variety of programs, provision of appropriate information on available facilities, and cooperation with educational institutions for institutionalization and increased effectiveness of school-based forest utilization programs. In addition, a scientific basis for data accumulation is needed. Conclusion: The Ministry of Forestry is cooperating with the Ministry of Education and local education offices to activate a forest-use health promotion program for elementary school students. Additionally, to utilize the forests in regular education courses, teachers should strive to spread positive awareness of forests.