• The Journal of the Korea institute of electronic communication sciences
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• v.7 no.5
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• pp.1103-1108
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• 2012

In the past several years there has been increasing the studies using P2P technology. In these P2P systems, the server to support the contents-information have less overloads than the composed system as the server to have resources generally. In this paper, we propose the system to support a menu based on the social network P2P system. The object of this study was to widen the use of this menu system to determine the price based on visual information. This system is based on previous research, showing excellent success rate. Therefore, this system is suitable for micro, small and medium industries in the use of P2P servers. This system is more usable than previous study.

• International Journal of Internet, Broadcasting and Communication
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• v.7 no.1
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• pp.42-48
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• 2015

Generally, the current commercial cloud system is hosted by the centralization large datacenter. However, the other clouding forms existed and one of them is the P2P cloud. The P2P Cloud is a distributed systems, is freedom to join and leave and is possible to provide the IaaS. Commonly, P2P Cloud System is based on Pure-P2P System. Since a number of connection paths exist, it has a high reliability and easily scalability of the network. However, there are disadvantages of the slow rate of route because of looking up the all peers in order to search for the peer. In this paper, it proposes the P2P cloud system based on super-peer P2P. Super-peer P2P system has fast routing time, because of searching for cluster unit and it also can has high reliability and high scalability. We designs the super Peer cloud service and proposes the system model and Resource Allocation Algorithm for IaaS in Super peer P2P environment.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.9 no.8
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• pp.1691-1695
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• 2005

Mobile P2P Service can compose free network from one client to another without central server function. Diversified Information & Data are able to be transmitted among peer to peer based upon extended mobile concept. In this paper Mobile P2P Service is applied to the program which gathering, sharing, analysis agricultural information and the natural disasters Information We desire to authenticate request about service to user who is administered between each user to limit connection. Wish to admit authentication mechanism to mechanism that can do information sharing suety in P2P environment to solve this in this treatise and design authentication mechanism.

• International Commerce and Information Review
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• v.6 no.3
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• pp.63-79
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• 2004

Peer-to-peer(P2P) has potential strength and possible factors which enable it to develop toward a new business by supplementing the limitation of the existing central server-type network. In various business sectors, various attempts have already been made to apply P2P. The computing power which was possible to be formed through peer-to-peer networking will become a powerful tools for expanding toward new business area depending the utilization methods by sector. Although the technology-centric P2P concept is a major interest now, its development direction will head toward service-centric P2P concept for satisfying desires of end-users(individual peers) for reliable contents and improving their purchasing convenience. But the solution requisites should be solved for the efficient application of P2P to business such as the establishment of and supplement for the industrial standard and legal system for P2P, the enhancement of peers recognition of P2P. Presently e-commerce using P2P is being implemented by a few enterprises locally by means of B2C. But if many enterprises enter this type of e-commerce, and the standardization of peer programmes, goods and documents is made, it will be able to be extended to B2B. Also it seems that it can be utilized in international transactions as well as in domestic transactions. So there is much room for the application of P2P to be extended further. Also there has been presented the necessity for related industries to support their work with theories and for academic studies to be made actively to set the direction of its development. It is hoped that multi-angled and in-depth studies on the utilization of P2P and various attempts to application of it to business be made on the basis of this study. For the development of P2P, continuous study and attempts are needed. The field of P2Ps application is very large and it will become a powerful tool, depending upon its application methods.

• Korean Journal of Microbiology
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• v.52 no.1
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• pp.120-124
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• 2016

A certain size of DNA (28-29 kb long) to be packaged into P2-size head and the mutation in sid gene of bacteriophage P4 are the major factors to overcome "P2 sir-associated helper inefficiency". To clarify whether the presence of sid mutation is essential to overcome "P2 sir-associated helper inefficiency" or not, we tested the P4 derivative, P4 delRI::kmr, which is $sid^+$ and whose genome size supposed to be 28.5 kb long in the case of being packaged into $P2_{sir3}$-sized large head. As P4 delRI::kmr showed the low EOP with P2 sir3 lysogen, P4 delRI::kmr phage stock was prepared in P2 sir3 lysogen host to increase the EOP with P2 sir3 lysogen. Through this process, P4 delRI::kmr had been adapted for P2 sir3 lysogen. With a CsCl buoyant equilibrium density gradient experiment and gel electrophoresis of the isolated DNA, it was evident that the adaptation of P4 delRI::kmr for P2 sir3 lysogen was caused by the conformational change of DNA to be packaged into large head. The burst size determination experiments with P4 delRI::kmr phage stock adapted for P2 sir3 lysogen and normal P4 delRI::kmr phage stock showed that not the sid mutation but the size of DNA to be packaged (28-29 kb long) was essential to overcome "P2 sir-associated helper inefficiency".

• Journal of Satellite, Information and Communications
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• v.10 no.3
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• pp.44-47
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• 2015

In this paper, P2P VLC Sound Transmission Technology between Underwater Object of 5cm Distance. It proposed a P2P VLC sound transmission technology, and developed a P2P VLC sound transmission technology between LED transmitter and PD(Photo Detector) receiver of 15cm distance. Under the assumption that the underwater environment, it performs a P2P VLC sound transmission experiment between LED transmitter and PD receiver for sound transmission, and demonstrated the usefulness of the proposed technology. In this paper, P2P VLC Sound Transmission Technology between Underwater Object of 5cm Distance, and proposed technology is expected to be widely used in various fields because it can use P2P VLC sound transmission technology between underwater object in the underwater environment.

• East Asian mathematical journal
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• v.19 no.1
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• pp.73-80
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• 2003

Let D be a bounded domain in $\mathbb{C}^n$ with $C^2$ boundary. In this paper, we prove the following inequality $${\parallel}u{\parallel}_{p_2,{\alpha}_2}{\lesssim}{\parallel}u{\parallel}_{p_1,{\alpha}_1}+{\parallel}\bar{\partial}u{\parallel}_{p_1,{\alpha}_1+p_1}/2$$, where $1{\leq}p_1{\leq}p_2<\infty,\;{\alpha}_j>0,(n+{\alpha}_1)/p_1=(n+{\alpha}_1)/p_1=(n+{\alpha}_2)/p_2$, and $1/p_2{\geq}1/p_1-1/2n$.

• Journal of the Korean Ceramic Society
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• v.30 no.3
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• pp.206-214
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• 1993

Coherent precipitation of Zn3P2 during Zn diffusion in a GaInAsP/InP heterostructure was studied using high-resolution transmission electron microscopy. Zn-diffusion-induced intermixing of Ga and In across the GaInAsP/InP heterointerface provided a Ga-mixed InP region which was nearly lattice-matched with Zn3P2 crystal and thus allowed thecoherent precipitation of Zn3P2. The Zn3P2 precipitates were preferentially nucleated at stacking faults which were formed to relax interfacial strain built up by the intermixing. The precipitates were grown to planar epitaxial layer along (100) plane in the lattice-matched region. The TEM images and diffraction pettern revealed that the tetragonal Zn3P2 crystals were coherently matched to the fcc structured GaInP matrix by the {{{{ SQRT {2} $\times$ SQRT {2} $\times$2 }} arrangement. The precipitation reaction of Zn3P2 was explained by an atomic migration model based on the kick-out mechanism.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.777-780
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• 2007

인터넷 스트리밍 시스템은 스트리밍 소스를 공급하는 미디어 서버와 이로부터 미디어 스트림을 받아 분배하는 스트리밍 서버, 그리고 스트리밍 단말기들로 구성되며, 기존에는 하나의 스트리밍 서버에 다수의 단말기들이 직접적으로 연결되는 방식을 취하고 있다. 이러한 클라이언트-서버 형태의 중앙 구조의 단점을 극복하여 확장성을 제공하기 위해 P2P 스트리밍 시스템에 대한 연구가 최근 들어 진행되고 있다. 그러나 P2P 방식을 이용한 인터넷 스트리밍 시스템을 설계, 구현, 테스트를하기 위해서 많은 비용이 소비되는 현실적인 어려움이 있다. 그러므로 본 논문에서는 P2P 스트리밍 시스템에 대한 다양한 연구 및 실험을 지원하기 위해, P2P 스트리밍 시스템을 정의하고, NS2 시뮬레이션 라이브러리를 이용하여 P2P 스트리밍 시스템 시뮬레이터 P2PStreamSim을 설계 및 구현하였다. 또한 테스트 P2P 스트리밍 시스템을 사례로 적용하여 P2PStreamSim의 동작을 검증하고 성능을 평가하였다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.9C
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• pp.669-675
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• 2008

For an odd prime p, n=4k and $d=((p^2k+1)/2)^2$, there are $(p^{2k}+1)/2$ distinct decimated sequences, s(dt+1), $0{\leq}l<(p^{2k}+1)/2$, of a p-ary m-sequence, s(t) of period $p^n-1$. In this paper, it is shown that the cross-correlation function between s(t) and s(dt+l) takes the values in $\{-1,-1{\pm}\sqrt{p^n},-1+2\sqrt{p^n}\}$ and their, cross-correlation distribution is also derived.