Browsing by Author "Cheng, Yu-Hsin"

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A novel method for delivering multimedia e-advertisement data base on use multi-path and multi-seed peer-to-peer-like approach
(2014-03-01)
Cheng, Yu-Hsin
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Chen, Deng-Jyi
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資訊工程學系
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Department of Computer Science
With the fact that digital signage are characterized for the variable and abundant multimedia visual and audio expressions and exhibit advantages of multiplicity, locality, real-time, segmentation, and existence, they have been predicted to emerge as the major trend in the future advertising in various surveys. Focused on the characteristics of disseminating the multimedia electronic advertisements through the network, there will be an enormous amount of data transmitted and various electronic advertising distributed in accordance with the regions. To specifically address these needs, we will propose a multi-path, multi-seed dissemination approach suitable for the delivery of the multimedia electronic advertisements. In this paper, within a peer-to-peer network structure, the network cluster will be first formed in accordance with the locality. Based on each cluster's locality, the electronic advertisements designated for dissemination into a specific cluster can then be determined. We then apply the seed concept formed by BitTorrent to segment the entire multimedia electronic advertisement into myriad seeds. At the same time, this paper adopts the Optimal Multi-Path Routing proposed by Guoliang Xue to design a peer-to-peer-like multiple multi-path framework, followed by the distribution of myriad seeds into each node within the cluster. Each node's bandwidth will also be utilized to complete the re-transmission of the multimedia electronic advertisement for achieving the objective of establishing multimedia electronic advertisement on each node. The NCTUns Network Simulator and Emulator was utilized to simulate the transmission status for variable number of node. The approach proposed by this manuscript can be applied to different set-up parameters and data size. The experimental results indicate that the key determining factor of transmission time under the multi-path and multi-seed dissemination approach is the data size. Transmitting the same data size under a multi-path and multi-seed approach does not increase the transmission time as the number of nodes increase. Simulations demonstrate that the multi-path and multi-seed dissemination approach is suitable for the delivery of the multimedia electronic advertisements.
Crystalline conjugated polymer containing fused 2,5-di(thiophen-2-yl)thieno[2,3-b]thiophene and thieno[3,4-c]pyrrole-4,6-dione units for bulk heterojunction solar cells
(2011-01-01)
Chen, Guan-Yu
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Cheng, Yu-Hsin
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Chou, Yi-Jen
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Su, Ming-Shin
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Chen, Chia-Min
A new conjugated polymer, PDTTTPD, comprising 2,5-di-(thiophen-2-yl)thieno[3,2-b]thiophene and thieno[3,4-c]pyrrole-4,6-dione units, exhibits high crystallinity and excellent thermal stability. A device incorporating PDTTTPD and [6,6]-phenyl-C(71)-butyric acid methyl ester (1 : 1, w/w) exhibited a power conversion efficiency of 5.1%.
Crystalline conjugated polymer containing fused 2,5-di(thiophen-2-yl)thieno[2,3-b]thiophene and thieno[3,4-c]pyrrole-4,6-dione units for bulk heterojunction solar cells
(2011-01-01)
Chen, Guan-Yu
;
Cheng, Yu-Hsin
;
Chou, Yi-Jen
;
Su, Ming-Shin
;
Chen, Chia-Min
A new conjugated polymer, PDTTTPD, comprising 2,5-di-(thiophen-2-yl)thieno[3,2-b]thiophene and thieno[3,4-c]pyrrole-4,6-dione units, exhibits high crystallinity and excellent thermal stability. A device incorporating PDTTTPD and [6,6]-phenyl-C(71)-butyric acid methyl ester (1 : 1, w/w) exhibited a power conversion efficiency of 5.1%.
New Carbazole-Based Conjugated Polymers Containing Pyridylvinyl Thiophene Units for Polymer Solar Cell Applications: Morphological Stabilization Through Hydrogen Bonding
(2011-02-01)
Hsu, So-Lin
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Chen, Chia-Min
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Cheng, Yu-Hsin
;
Wei, Kung-Hwa
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材料科學與工程學系
We have synthesized two conjugated polymers (P1, P2) containing alternating electron-donating and -accepting units, based on N-alkyl-2,7-carbazole, 4,7-di(thiophen-5-yl)-2,1,3-benzothiadiazole and 3-[2-(4-pyridyl)vinyl]thiophene units. These conjugated polymers contained different contents of pyridine units, which were incorporated to form hydrogen bonds with [6,6]-phenyl-C(61)-butyric acid (PCBA). When these hydrogen bonding interactions were present in the polymer thin films, their thermal stability improved; deterioration, which occurred through aggregation of PCBA methyl ester after lengthy annealing times, was also suppressed. The power conversion efficiency of a device incorporating the film featuring hydrogen bonding interactions remained at 75% of the original value after thermal annealing for 5 h at 140 degrees C. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 603-611, 2011