• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.5
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• pp.2291-2297
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• 2012

X-ray fluorescence sprectrum signal include the continuum. XRF analysis the components of material by the amplitude of peaks. XRF remove the noise and background. To remove the noise, we apply the smoothing filter. And background removal methods applied such as SNIP, Morphology, Threshold methods. In this paper, we applied Threshold using DWT. Interval threshold method divide the some blocks in particular levels. We propose the method that is divided the particular level.

• Journal of Communications and Networks
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• v.18 no.2
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• pp.261-269
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• 2016

In this paper, the impact of energy constraints on a two-hop network with a source, a relay and a destination under random medium access is studied. A collision channel with erasures is considered, and the source and the relay nodes have energy harvesting capabilities and an unlimited battery to store the harvested energy. Additionally, the source and the relay node have external traffic arrivals and the relay forwards a fraction of the source node's traffic to the destination; the cooperation is performed at the network level. An inner and an outer bound of the stability region for a given transmission probability vector are obtained. Then, the closure of the inner and the outer bound is obtained separately and they turn out to be identical. This work is not only a step in connecting information theory and networking, by studying the maximum stable throughput region metric but also it taps the relatively unexplored and important domain of energy harvesting and assesses the effect of that on this important measure.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.7
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• pp.3191-3196
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• 2011

Smart home system are being installed in the most new construction of building for the convenience of living life. As smart home systems are becoming more common and their diffusion rates are faster, hacker's attack for the smart home system will be increased. In this paper, Risk level of smart home's to do respond to intrusion that occurred from the wired network and wireless network intrusion cases and attacks can occur in a virtual situation created scenarios to build a database. This is based on the smart home users vulnerable to security to know finding illegal intrusion traffic in real-time and attack prevent was designed the intrusion detection algorithm.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.1
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• pp.51-56
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• 2013

This paper is the experimental study to investigate the noise sources location in order to reduce the noise level of line flow fan for the air conditioner in the subway car. The noise of line flow fan is caused by various factors such as the turbulence by air flow, random noise, noise of blade passing frequence(681Hz) and noise due to structural vibration of rotor unbalance(28.4Hz) by motor revolution. By performing the noise reduction on each sound source, the noise level is decreased as much as 5.7dB(A) through the controls of housing guide angle and distance, the configuration changes of flow passage shape and rotor balancing.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.5
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• pp.919-925
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• 2006

Mobile IPv6 generates the loss of packets and out of sequencing when hand off, In this paper, We propose a improved hand off techniques using the mobility pattern of mobile nodes. As making group by presetting the moving range of mobile nodes, and putting buffer server in the group, the packet loss and out of packet sequence can be reduced. The proposed method prevents the out of packet sequence in If level which can be happened in the stable state, minimizes the packet re-send in TCP level. In the simulation, the proposed hand off techniques transmits packets efficiently by using the mobility pattern of mobile nodes.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.3
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• pp.654-659
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• 2009

In the early stage of electronic commerce the technical aspects were regarded as the most important factor for its success, but the economic and managerial aspects gain currently more and more its importance. In this paper some issues are researched which are emerging as essential factor with the development of electronic commerce. Especially this survey was carried out from four managerial aspects which are management strategy, marketing, procurement/logistics and service. The result of this research shows us that the importance level of management strategy and procurement/logistics are low, but that of marketing and service are very high. AHP-Analysis as the result of this paper shows the importance list in rank of service, marketing, procurement/logistics and management strategy.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.3
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• pp.660-664
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• 2009

Over the past several years many researchers have attempted to explore the determinants of franchise restaurant success. This study is a research on the critical success factors of the franchise restaurant management which is expanding. The purpose of this study is to present right information to the managers of franchise restaurant fur their marketing and sales. The information is achieved from studying customers' intention. I also measured customers' satisfaction fur management of franchise restaurant and assessed maturation extent. In conclusion, The results show franchise restaurant's menu, atmosphere and accessibility are a considerable level in research results. However, franchise restaurant's brand, service, food, price and size are low level(determinants fact). Therefore, franchise managers have to complement a those factors. The result indicated that the points in time of forecast about the franchise restaurants CSFs are in 5 years mainly.

• Fourth Industrial Review
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• v.2 no.2
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• pp.39-46
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• 2022

Purpose - This study analyzes the investment environment of South Korea by using the rating scale of Robert B Stobaugh, Jr, and draws conclusion implication. Research design, data, and methodology - The study conducted a survey on according to the political stability, capital repatriation, foreign ownership allowed, discrimination and controls, foreign vs domestic businesses, currency stability, willingness to grant tariff protection, availability of local capital, and annual inflation for last 5 years. The score of these eight aspects will be given based on the current situation in South Korea and the sum of the scores will be calculated. Result - China-Korea economic and trade relations are in a stage of transformation and upgrading, and the level of economic and trade cooperation in various fields is reaching a new level. It is hoped that Chinese enterprises will grasp business opportunities, strengthen research and analysis of the Korea market and achieve mutually beneficial cooperation. Conclusion - The investment environment of South Korea is superior according to the political stability, capital repatriation, foreign ownership allowed, discrimination and controls, foreign vs domestic businesses, currency stability, willingness to grant tariff protection, availability of local capital, and annual inflation for last 5 years.

• Korean Journal of Childcare and Education
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• v.20 no.1
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• pp.73-89
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• 2024

Objective: The purpose of this study was to examine the effect of communication and cooperation between teachers and parents on infant care. Specifically, this study explored the direct effect of teacher-parent partnership on teacher-infant interactions and the indirect effect through teacher sensitivity. Methods: The participants of this study were 216 teachers in charge of infant classes at child care centers located in Gyeonggi-do. They responded to questionnaires on teacher-parent partnership, their sensitivity, and teacher-infant interactions. Data were analyzed using structural equation modeling. Results: First, teacher-parent partnership did not have a direct impact on teacher-infant interactions. Second, teacher-parent partnership indirectly influenced teacher-infant interactions through teacher sensitivity. In other words, a high level of teacher-parent partnership was associated with a high level of sensitivity, subsequently resulting in the provision of high-quality interactions for infants. Conclusion/Implications: This study confirmed the role of teacher sensitivity as a mechanism to explain how teacher-parent partnership is linked to teacher-child interactions. The results emphasize the importance of communication and cooperation between teachers and parents in enhancing teachers' sensitivity and, ultimately, providing high-quality child care to infants.

• Journal of the Korean association of regional geographers
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• v.19 no.2
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• pp.340-351
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• 2013

International society has been making a lively discussion about natural disaster by climate change to mitigate natural hazard centering around intra-government association. This study dealt with a strategic mitigation and technical adaptation to support a habitual natural disaster region such as Bangladesh in terms of international cooperation for assistance to protect against the natural hazard. The land-cover on scale of one third of Bangladesh is situated lower than sea level that causes habitual flooding accident which gets increasing in the strengthen every single year. Most of people lives around exterior sea coast being faced with disaster of abnormal storm forming every three year cycle. Especially, the socio-economic status of the people in the coast is usually very low, and it need to get help from international cooperation aid. Therefor, the case study for the vulnerability of natural disaster in Bangladesh on geographical analysis is meaningful to join the international cooperation taking a part of role on technical support and education for adaptation of the natural disaster.