• 한국산업정보학회:학술대회논문집
• /
• 한국산업정보학회 2002년도 춘계학술대회 논문집
• /
• pp.289-296
• /
• 2002

In this research, the concept and application structure of WAP were investigated and the mathematics content of elementary schools was applied to WAP directly for its implementation. WML and WMLScript programs were made by using the editor. The, the image file that was suitable for WAP program was made by using the image converter. We directly implemented the program using WML and WML Script through the emulator of Neple and that of Phone.com. The implementation result of Neple's emulator confirmed the possibility that the educational program with a simple image and a calculation function can be implemented through WAP Phone.com's emulator did not represent the result shown by Neple's emulator. This was due to the different browser functions of the wire service companies and different input content of the headers of the WML. It showed that the implementation results of image files and programs were differently represented depending on the kinds of WAP browsers.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2006년도 하계종합학술대회
• /
• pp.3-4
• /
• 2006

Fast IP address lookup in routers is essential to achieve packet forwarding in wire-speed. The longest prefix matching for IP address lookup is more complex than exact matching because of its dual dimensions, length and value. By thoroughly studying the current proposals for IP address lookup, we find out that the binary search could be a low-cost solution while providing high performance. Most of the existing binary search algorithms based on trie have simple data structures which can be easily implemented, but they have some problems because of empty internal nodes. The proposed algorithm is based on trie structure, but empty internal nodes are replaced by priority prefixes. The best-matching-prefix search in the proposed algorithm is more efficiently performed since search can be finished earlier when input is matched with a priority prefix. The performance evaluation results show that the constructed priority-trie has very good performance in the lookup speed and the scalability.

• Journal of Welding and Joining
• /
• 제34권6호
• /
• pp.11-15
• /
• 2016

YP 690MPa grade steels are used as the main structural steel for offshore structure such as Jack-up Rig and WTIV(Wind Turbine Installation Vessel). Most of welding consumables applied to YP 690MPa grade steels are basic type flux cored wires that shows the poor weldability and not suitable for all position welding. For this reason, welding consumables with rutile type flux system is required. Rutile type flux cored wires show excellent weldability and apply to all position welding. This paper presents the mechanical properties of weld metal with rutile type flux cored wire developed and finally assessed the possibility for application.

• 대한치과교정학회지
• /
• 제15권2호
• /
• pp.303-312
• /
• 1985

This study was designed to get the knowledge of the structural characteristics of the lingual dental arch shapes of Koreans. The subjects consisted of 107 normal occlusions. The lingual structure which was divided into two groups, anterior and posterior part, was measured and analyzed. 33 pairs of the 107 samples were used to test the derived results. The findings of this study were as follows: 1. The mathmatical functions of the 12 curves which showed good fitting to the upper and lower anterior lingual arch were derived and flawed to the same scale using the computer graphics. 2. The results of the test showed a reasonable degree of accuracy to all of the 33 random samples. 3. The average degrees of posterior flexions were obtained and could be used as a initial guide at the wire-bending.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2015년도 추계학술대회
• /
• pp.73-74
• /
• 2015

본 논문에서는 난시청 지역에서 활용 가능한 지상파 디지털 TV 수신용 안테나를 설계하고 적용 가능성을 검토하였다. 제안된 안테나는 $16cm{\times}14cm$ 크기의 와이어 안테나 구조를 가지며 MoM법을 이용하여 안테나 파라미터를 계산하였다. 제안된 안테나의 경우, 국내에서 시행되고 있는 UHF 대역의 디지털 방송 수신이 가능함을 확인하였다.

• International Journal of Railway
• /
• 제9권1호
• /
• pp.15-20
• /
• 2016

An approach section on an abutment is located between the soil embankment and the structure, which may cause an uneven surface due to different settlement between the abutment and the soil embankment. This study proposes a new type of wall which separates the abutment from the backfill material using mechanically stabilized wall. A new type of keystone which incorporates geotube and wire mesh is proposed and evaluated. Numerical analyses were performed to investigate the applicability of the proposed keystone type, which incorporates Geosynthetic. The maximum horizontal displacements along GRS wall faces, settlements at the top of pavement and track bed, and tensile forces applied on geotextiles under traffic loads were investigated. The results of the numerical analysis showed that the proposed wall can be used for highway and high-speed railway abutment.

• 대한기계학회논문집B
• /
• 제25권2호
• /
• pp.260-268
• /
• 2001

Wake structures behind two circular cylinders with different groove configurations(U and V-shape) have been investigated experimentally. The results were compared with those for the smooth cylinder having the same diameter D. The drag force, mean velocity and turbulent intensity profiles of wake behind the cylinders were measured with varying the Reynolds number in the range of Re(sub)D=8,000∼14,000. As a result, the U-shaped groove was found to reduce the drag up to 18.6%, but the V-shaped groove reduced drag force only 2.5% compared with the smooth cylinder. As the Reynolds number increases, the vortex shedding frequency becomes a little larger than that of the smooth cylinder. The visualized flow using the smoke-wire and particle tracing methods shows the flow structure qualitatively.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2007년도 춘계학술대회 논문집 전기설비전문위원
• /
• pp.85-87
• /
• 2007

This paper summarize about the auxiliary electrode measured a ground resistance The method to measure a ground resistance is the fall-of-potential method to using an auxiliary electrode. And an auxiliary electrode must be set up on the ground. Today it is so difficult to set up the auxiliary electrode on the ground because of many concrete building and many paved roads. So this paper is regarding of the ground resistance measurement by the substitute auxiliary electrode. It substituted a iron structure around the building, a wire net for auxiliary electrode. This information is confirmed by compared with the measurement value.

• Journal of information and communication convergence engineering
• /
• 제1권1호
• /
• pp.27-30
• /
• 2003

Electrophoretic deposition (EPD) of alcohol YBCO suspensions on the Ag wire electrode is studied. Poly(ethylene glycol) was coordinated to a structure formed by the EPD process with YBCO particles. The suspension is characterized in terms of zeta potential and conductivity. The d.c electric fields of 200-300 V/cm are applied for 1-10 min. The optimal condition for the EPD allows modifying the properties and microstructure of the deposited films. Superconducting coatings with nanometer-sized pores and a preferred orientation along the c-axis were prepared from the result with chemically modified precursor solution. In contrast, YBCO coatings of submicrometer-sized pores and randomly orientated grains were prepared from the solution without PEG.

• Transactions on Electrical and Electronic Materials
• /
• 제4권5호
• /
• pp.6-9
• /
• 2003

Electrophoretic deposition (EPD) of alcohol YBCO suspensions on the Ag wire electrode is studied. Polyethyleneglycol was coordinated to a structure formed by the EPD process with YBCO particles. The d.c electric fields of 200-300 V/cm are applied for 1-10 min. The optimal condition for the EPD allows modifying the properties and microstructure of the deposited films. Superconducting coatings with nanometer-sized pores and a preferred orientation along the caxis were prepared from the result with chemically modified precursor solution. In contrast, YBCO coatings of submicrometer-sized pores and randomly orientated grains were prepared from the solution without PEG.