4,405 research outputs found
Economic development through knowledge creation
๋
ธํธ : Proceedings of the 34th Hawaii International Conference on System Science
Quark number Susceptibility and Phase Transition in hQCD Models
We study the quark number susceptibility, an indicator of QCD phase
transition, in the hard wall and soft wall models of hQCD. We find that the
susceptibilities in both models are the same, jumping up at the deconfinement
phase transition temperature. We also find that the diffusion constant in the
soft wall model is enhanced compared to the one in the hard wall model.Comment: 14 pages, 2 figure
The Origin of Taegilm, the Large Transverse Flute of Korea
The taegum (ๅคง็ฌ), a large transverse flute having various tone colors such as a clear dignified sound and a fascinating sound produced by a vibrating reed membrane, can be divided into two categories: the classical taegum and the folkloric taegCtm. The former is widely used in classical music such as the court music, the ensemble music of the literati, and the accompaniment of classical songs, and the latter in folk music such as improvised ensemble music (shinawi), solo instrumental music (sanjo), and the accompaniment of folk songs. Owing to the exciting vibration of the reed membrane, the taegum proves its worth particularly in solo performances. The first written reference to the taegum appears in the Samguk sagi (ไธๅๅฒ่จ, Chronicles of the Three Kingdoms). Other historical treatises and archaeological findings prove that the prototype of the taegum, the hoengjok(ๆฉซ็ฌ), was already in use during the early years of the Koguryo Kingdom(37 BC-AD 668), which had accepted the music from the so-called Western Region (่ฅฟๅ), the present Central Asia and Indian region. The taegum, one of three bamboo transverse flutes (taegum, chunggum, ไธญ็ฌ, and sogum, ๅฐ็ฌ) of the Shilla Kingdom (57 BC-AD 935), is a legacy of the musical culture of the Koguryo and Paekche Kingdom.
์ฅ์คํ๋ฉด์๋ ๋ง์ ์๋ฆฌ์, ๊ฐ๋์ฒญ์ ์ธ๋ ค ์ฅ์พํ ์๋ฆฌ๋ฅผ ๋ด๋ ๋ฑ ๋ค์ํ ์๋น๊น์ ๊ตฌ์ฌํ๋ ๅคง็ฌ์ ๊ทธ ์ฉ๋ก์ ๋ฐ๋ผ ์ ์
๋๊ธ๊ณผ ์ฐ์กฐ๋๊ธ์ ๋ ์ข
๋ฅ๋ก ๊ตฌ๋ถ๋๋ค. ์ฆ ์์ ์ฒ์ด๋ ์ฌ๋ฏผ๋ฝ ๋ฑ ๊ถ์ค์ ์ด์ ์์ ์ฐ์ฃผ๋๋ ้
ๆจ๊ณผ ๅฎด็ฆฎๆจยท็ฅญ็ฆฎๆจ์ ๋ฌผ๋ก ์์ฐํ์ ๋ฑ ๋ฏผ๊ฐ์ ์คํ๋ฅ๋ ๋ํ๋ฅ, ๊ฐ๊ณกยท๊ฐ์ฌยท์์กฐ์ ๋ฐ์ฃผ์ ์ด๋ฅด๊ธฐ๊น์ง ๆญฃๆจ๊ณํต์ ์์
์ ๋ฐ์ ๊ฑธ์ณ ์ฌ์ฉ๋๋ ์ ์
๋๊ธ๊ณผ, ์๋์๋ ์ฐ์กฐยท๋ฏผ์๋ฐ์ฃผ ๋ฑ ๋ฏผ์์์
์ ์ฌ์ฉ๋๋ ์ฐ์กฐ๋๊ธ์ด ๋ฐ๋ก ๊ทธ๊ฒ์ด๋ค. ์ด๋ฌํ ๋๊ธ์ ์ฅ์พํ ๊ฐ๋๋ง์ ๋จ๋ฆผ์๋ฆฌ ๋๋ฌธ์ ํนํ ๋
์ฃผ๊ณก์์ ๊ทธ ์ง๊ฐ๋ฅผ ๋ฐํํ๋ค. ๋๊ธ์ ใไธๅๅฒ่จใ์ ์ฒ์ ๊ธฐ๋ก์ด ๋ํ๋๋๋ฐ, ์ฌ๋ฌ ๊ณ ๊ณ ํ ์๋ฃ์ ๋ฌธํ์ฌ๋ฃ๋ฅผ ๊ฒํ ํ ๊ฒฐ๊ณผ, ๋๊ธ์ ์ ์ ์ธ ๆฉซ็ฌ์ด๋ ็ฌ ๋ฑ์ ์
๊ธฐ๊ฐ ๊ณ ๊ตฌ๋ ค์ ๋ฐฑ์ ์์ ์ด๋ฏธ ์ฌ์ฉ๋์์ผ๋ฉฐ, ๊ทธ์ ๋ฐ๋ผ ๋๊ธ์ ํฌํจํ ์ ๋ผ์ ไธ็ซน์ ์ ๋ผ๊ฐ ์ผ๊ตญํต์ผ ์ดํ ๊ณ ๊ตฌ๋ ค์ ๋ฐฑ์ ์ ์์
๋ฌธํ๋ฅผ ์์ฉํ ๊ฒฐ๊ณผ๋ผ๊ณ ํ๋ค
Progressive Processing of Continuous Range Queries in Hierarchical Wireless Sensor Networks
In this paper, we study the problem of processing continuous range queries in
a hierarchical wireless sensor network. Contrasted with the traditional
approach of building networks in a "flat" structure using sensor devices of the
same capability, the hierarchical approach deploys devices of higher capability
in a higher tier, i.e., a tier closer to the server. While query processing in
flat sensor networks has been widely studied, the study on query processing in
hierarchical sensor networks has been inadequate. In wireless sensor networks,
the main costs that should be considered are the energy for sending data and
the storage for storing queries. There is a trade-off between these two costs.
Based on this, we first propose a progressive processing method that
effectively processes a large number of continuous range queries in
hierarchical sensor networks. The proposed method uses the query merging
technique proposed by Xiang et al. as the basis and additionally considers the
trade-off between the two costs. More specifically, it works toward reducing
the storage cost at lower-tier nodes by merging more queries, and toward
reducing the energy cost at higher-tier nodes by merging fewer queries (thereby
reducing "false alarms"). We then present how to build a hierarchical sensor
network that is optimal with respect to the weighted sum of the two costs. It
allows for a cost-based systematic control of the trade-off based on the
relative importance between the storage and energy in a given network
environment and application. Experimental results show that the proposed method
achieves a near-optimal control between the storage and energy and reduces the
cost by 0.989~84.995 times compared with the cost achieved using the flat
(i.e., non-hierarchical) setup as in the work by Xiang et al.Comment: 41 pages, 20 figure
Test Platform Development of Vessel???s Power Management System Using Hardware- in-the-Loop-Simulation Technique
A PMS (Power Management System) controls vessel's power systems to improve the system efficiency and to protect a blackout condition. The PMS should be developed with considering the type and the capacity of the vessel???s power system. It is necessary to test the PMS functions developed for vessel???s safe operations under various sailing situations. Therefore, the function tests in cooperation with practical power systems are required in the PMS development. In this paper, a hardware-in-the-loop (HIL) simulator is developed for the purposes of the PMS function tests. The HIL simulator can be more cost-effective, more time-saved, easier to reproduce, and safer beyond the normal operating range than conventional off-line simulators, especially at early stages in development processes or during fault tests. Vessel's power system model is developed by using a MATLAB/SIMULINK software and by communicating between an OPAL-RT???s OP5600 simulator. The PMS uses a Modbus communication protocol implemented using LabVIEW software. Representative tests of the PMS functions are performed to verify the validity of the proposed HIL-based test platform
The use of Facebook in a multi-course collaborative project within a cross-cultural context
Facebook is the most popular social network site worldwide with over one billion active users every month (Facebook, 2012) and most university students are already using it. Therefore, implementing it into the classroom provides a familiar environment for students. The benefits of Facebook use, such as interaction, communication, social relationship, and participation, have been found to affect student motivation in learning (Lam, 2012). However, the role of Facebook use in student attitude and intention toward the project has not been examined in a multi-course, multi-cultural context
- โฆ