• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.6
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• pp.1208-1214
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• 2009

Sensor networks are vulnerable to data congestion and hot-spot compared with wireless networks. Mobile sink supporting route protocol has such problems as hot-spot and data congestion because agent of cluster node transmits all data packet. Therefore, mobile sink supporting route protocol needs to reduce the number of packets and keep the packets from concentrating on a single node. To solve these problems, we propose mobile sink supporting routing Protocol using agent of cluster node. Cutting down on the number of packets compared with the existing mobile sink supporting routing Protocol, our proposed protocol has reduced both communication overhead and energy consumption.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.10a
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• pp.665-668
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• 2007

The location based service means the service using the location information and the service used based on the location information comes into the spotlight as the critical information of the future mode townsman ubiquitous-City construction. LBS settles down as the core element of ITS or the telematics as the cutting edge technology appearing according to the power generation of the mobile communication technology and recently gradually broadens a range to the public safety service including the distribution management, the asset management, a children and old and the weak protection means, the disaster preparation rescue service like the E-911 of U.S. In the national, the technical regulations about the ground wave LBS was established at November 2005 for the first time in the country. but it actually operated and problems were deduced. Therefore, in this paper, domestic and foreign LBS usage trend and technical standards case try to be analyzed for the revision of the technical regulations of the ground wave LBS serviced in the national and the national technical standards bill for the revision tries to be prepared based on this.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.4
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• pp.902-908
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• 2013

This paper suggests to compress data selectively for improvement of data compression efficiency, not to perform unconditional compression on data. Whether to compress or not is determined by selective data distinction. By doing so, we can avoid unnecessary compression in the case of low compression efficiency. Cutting down the unnecessary compression, we can improve the performance of the pre-compression algorithm. Especially, the data algorithm which was already compressed could not be compressed efficiently in many cases, even if apply compression algorithm again. Even in these cases, we don't have to compress data unnecessarily. We implemented the proposed function actually and performed experiments with implementation. The experimental results showed normal operation.

• Journal of the Korea Furniture Society
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• v.27 no.2
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• pp.145-153
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• 2016

Today, furniture design, which is changing and diversified, a movement to search a new formative world while reviving our traditionality is continuously proceeded, that implies a new possibility in our culture. In respect of such diversified materials, Korean traditional paper, Hanji (韓紙), has already been acknowledged with its excellence. Also, Hanji is a material that fully contains aesthetic consciousness of Korean people, accordingly, this research investigated and analyzed mainly with Sarangbang furniture among Joseon antique furniture, in order to study the possibility of Hanji decorated furniture as the objet in our interior space. This research utilized Paper cut technique (剪紙技法) among Hanji Crafts technique of expressive elements of Sarangbang furniture using Hanji, which is to make patterns and attach them by cutting out or engraving colored papers using scissors or graver to the wooden frame (白骨). Through this, this research could investigate production process utilizing Paper cut technique, also, Sarangbang furniture utilizing such Paper cut could be settled down as the objet with functional aspect and aesthetic completion in our interior space. Also, the researcher presents value of our original furniture by suggesting final output and considers that systematic researches should be conducted continuously on furniture henceforth utilizing Paper cut technique.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.25 no.10
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• pp.1427-1435
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• 2001

Air movement in wokplaces, whether resulting from a forced ventilation system or naturally occurring airflow, has a significant impact on occupational health. In a huge shipbuilding factory building, typical harmful factors such as fume or vaporized gas from welding and cutting of steel plates, and dusts from grinding give unpleasant feeling. From field data survey, the yearly dominant, wind directions for the shipbuilding factory building tested were northwest, northeast and southeast Among the three wind directions, the ventilation improvement was the worst for the northeastern wind. This study was focused on location of the opening vents in order to utilize the natural ventilation effectively. Instantaneous velocity fields inside the 1/1000 scale-down factory building model were measured using a 2-frame PIV system. The factory building model was embedded in an atmospheric boundary layer simulated in a wind tunnel. The modified vents improve the internal Ventilation flow with increasing the flow speed more than two times, compared with that of present vents.

• Tribology and Lubricants
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• v.5 no.1
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• pp.44-50
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• 1989

High strength steel is similar to carbon steel in its composition. This material is developed originally for special uses such as aerospace and automobile due to its high strength and shock-free property in spite of lightness. But the chemical attraction of high strength steel is serious, which includes comminution of formation, metalization and strengthening. Machining results in built-up edge between this material and the tool. Especially the work hardening behavior results in tool life shortening, which was caused by temperature generation during machining. In this study, cooling system was made in which liquid nitrogen is supplied to circulate in order to make up for these weaknesses. Machining of high strength steels, which is recognized as difficult to machine materials, was conducted after tool is cooled at -195$\circ$C. Experimental results showed that the tool was cooled down rapidly below -195$\circ$C in about 200 seconds. The tool temperature of machining with cooling system was lowered by 60~95$\circ$C than that of machining in room temperature. The hardness of the surface of chip is decreased by machining with cooling system. And the machining using the cooling system made it possible to increase shear angle, to retain smooth surface on chip without built-up-edge and to get a better roughness.

• Journal of the Korean Wood Science and Technology
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• v.24 no.2
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• pp.71-80
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• 1996

Handling the manufacured goods is the most cost-consuming task in material handling system in wooden furniture industries. Fully automated warehouse for cartoned goods of a furniture manufacturing company was analized to provide plant engineers and managers with some important informations on the utility and profitability of the automated storage and retrieval system(AS/RS). Process-oriented simulation modeling tech-niques were used to describe the system and to propose some alternatives to promote the efficiency of AS/RS. Simulation report could be inter-preted as follows: 1. Warehouse for the furniture goods must be designed in accordance with reliable material handling program and constructed with suitable equipments depending on the specification of packed products. 2. An excess of palletized products induced the indigestion and the inefficiency of AS/RS of the furniture industry and put this high-costly system into the shade. 3. Overcrowded AS/RS of the furniture factories could regain its material handling function by cutting down the deposit of products into the automated warehouse. For this purpose, reducing the regular output and direct delivering the outside products to the destination should be considered as the definite counterplan. And additional operation of conventional handy warehouse was also expected to improve the efficiency of main AS/RS.

• Proceedings of the SAREK Conference
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• 2008.06a
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• pp.1267-1272
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• 2008

OTEC power plants are studied as a viable option for the supply of clean energy. In this paper, the thermodynamic performance of OTEC system was calculated. The results show that the working fluids such as R32 and R125 would be alternatives based upon cutting down the system size, environmental preservation, and conditions without having a severe penalty in efficiency. the initial cost significantly. The regeneration system increase in energy efficiency, and the system can generate electricity when the difference in warm and cold seawater inlet temperatures are greater than $15^{\circ}C$. Also, the system efficiency of OTEC power plant using the condenser effluent from nuclear power plant instead of the surface water increased about 2%.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.11
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• pp.1113-1122
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• 2020

The purpose of this study is to examine how the Indian banks have adjusted their risk-based capital ratios during 2009-2018 to meet the regulatory requirements. Banks can, in principle, increase their risk-based regulatory capital ratio, either by increasing their levels of regulatory capital or by shrinking their risk-weighted assets by adjusting asset growth or risk in the portfolio. We investigate banks' capital behavior by decomposing the change in the capital ratio into the contribution of its components and analyzing their variance across regulatory regimes and banks' ownerships. We further investigate how each component of the capital ratio is adjusted by the banks by breaking down them into balance sheet items. We find that the banks' capital behavior significantly differed between public and private sector banks and between the two regulatory regimes. During Basel II, banks, in general, followed a strategy of aggressive asset growth with increased risk-taking. The decline in the CRAR because of such an expansionary strategy was adjusted by augmenting additional capital. However, during Basel III, due to higher capital requirements, both in terms of quantity and quality, banks followed a strategy of cutting back their asset growth and reducing the risk in their portfolio to maintain their CRAR.

• Fashion & Textile Research Journal
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• v.9 no.3
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• pp.270-277
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• 2007

Buddhist temples and halls signify paradise on earth. Buddhist sutras refer to paradise as a place where flowers fall down like snow, fragrance and music fill the air, flowers blossom and butterflies fly. The Kkot Mun of Buddhist temples are an essential part of the creation of this paradise and are ornamented with elaborate sculptures of flowers and animals. The ornamentation of the Kkot Mun is truly admirable for its artistry and beauty. Although the Kkot Mun is an element of Korean traditional Buddhist architecture, it could also be applied to costume work. I thought the characteristic elements of the Kkot Mun for the costume work were the flower, the lattice and the transparent effect that was made with the lattice and Dagjongee. I used the technique of strap cutting, strap twisting and cut-out for the lattice of Kkot Mun and flower making, knitting, cut-out and quilting for the flower of Kkot Mun. I represented the transparent effect of Kkot Mun with the lapped materials. I selected six remarkable Kkot Mun of Korean temples, revised shapes of these and made six costume works. These six costume works would be the suggestion of costume design if an element of Korean traditional architecture was applied to modern costume making.