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About the Lifespan of Peer to Peer Networks
[article]
2006
arXiv
pre-print
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We analyze the ability of peer to peer networks to deliver a complete file among the peers. ...
According to this view the network has two main states: first centralized - few sources (roots) hold the complete file, and next distributed - peers hold some parts (chunks) of the file such that the entire ...
that download files from the network but do not share their own chunks. ...
arXiv:cs/0612043v1
fatcat:7wmmxjzhcncj7jsjzgicjvpdp4
About the Lifespan of Peer to Peer Networks
[chapter]
2006
Lecture Notes in Computer Science
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In this paper we analyze the ability of peer to peer networks to deliver a complete file among the peers. ...
This surprisingly suggests that peer to peer networks are able to sustain only a limited amount of information. ...
that download files from the network but do not share their own chunks. ...
doi:10.1007/11945529_21
fatcat:hyoejubynbbxpbr6kgvtcilyzi
Performance evaluation of Xunlei peer-to-peer network: A measurement study
2011
2011 IEEE Consumer Communications and Networking Conference (CCNC)
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To evaluate the effects of above solutions, we perform a series of measurements on Xunlei and BitTorrent networks. ...
of active peers but also the seed ratio. ...
Therefore, the average downloading speed is close to the limit of downloading bandwidth.
V. LIFESPAN The lifespan is another aspect of P2P network performance. ...
doi:10.1109/ccnc.2011.5766468
dblp:conf/ccnc/ZhaoZWGF11
fatcat:4jsa5ubjovezdbraciv54ttyuu
Designing Less-Structured P2P Systems for the Expected High Churn
2008
IEEE/ACM Transactions on Networking
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We address the problem of highly transient populations in unstructured and loosely-structured peer-to-peer systems. ...
While merely illustrative, the evaluated strategies and protocols clearly demonstrate the advantages of considering peers' session time in designing widely-deployed peer-to-peer systems. ...
We are also grateful to Jeanine Casler, Stefan Birrer, David Choffnes and Kevin Livingston for their helpful comments on early drafts of this article. ...
doi:10.1109/tnet.2007.903986
fatcat:4eefknqtrzeido62vtryougzoq
Hidden state dynamics reveals metastability across the adult lifespan
[article]
2020
bioRxiv
pre-print
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tool to reveal the metastability, the ability of the system to transition between different cognitive states, across the adult lifespan. ...
Adult lifespan is accompanied by functional reorganization of brain networks, but the dynamic patterns behind this reorganization remain largely unclear. ...
Acknowledgments This work was supported by the National Natural Science Foundation of China ...
doi:10.1101/2020.01.27.920652
fatcat:22khqrzvkffqjgszdzzd6gx7em
An analytical study of peer-to-peer media streaming systems
2005
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
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The unpredictable departure/failure of peers is a critical factor that affects the performance of P2P systems. We utilize the concept of peer lifespan to model peer failures. ...
Hybrid streaming systems that combine the use of dedicated streaming servers and P2P networks were proposed to build on the advantages of both paradigms. ...
ACKNOWLEDGMENTS The authors would like to thank Prof. ...
doi:10.1145/1111604.1111607
fatcat:pf4gqgrr4jhdpcdca7tzzx2r7e
Neuronal TORC1 modulates longevity via AMPK and cell nonautonomous regulation of mitochondrial dynamics in C. elegans
[article]
2019
bioRxiv
pre-print
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Finally, deleting the mitochondrial fission factor DRP-1 renders the animal refractory to the pro-aging effects of neuronal RAGA-1. ...
Loss of RAGA-1 increases lifespan via maintaining mitochondrial fusion. ...
Additionally, to determine the complexity of the mitochondrial 603 network, we focused on the Network and Junction Point attribute. ...
doi:10.1101/665190
fatcat:nrqlkhbrvvfbhopgfdktn5nntq
A Multicellular Network Mechanism for Temperature-Robust Food Sensing
[article]
2019
bioRxiv
pre-print
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Mechanistically, specific regulations in this network change with temperature to maintain similar food-responsiveness in the lifespan output. ...
This end-to-end robustness from environment to physiology is mediated by food- sensing neurons that communicate via TGF-β and serotonin signals to form a multicellular gene network. ...
Acknowledgments We thank the Horvitz Lab, the Bargmann Lab, and the C. elegans Genetics Center, which is funded by NIH Office of Research Infrastructure Programs (P40 OD010440) for reagents. ...
doi:10.1101/815373
fatcat:s4kdar62bbbejir6twq5cxv6pe
Structural covariance networks across the lifespan, from 6-94 years of age
[article]
2016
bioRxiv
pre-print
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Although structural covariance has been used to examine the development of brain networks in either adolescence or aging, no study to date has provided a lifespan perspective on the development of structural ...
Here, we investigate the lifespan trajectories of structural covariance in six canonical neurocognitive networks default, dorsal attention, frontoparietal control, somatomotor, ventral attention, and visual ...
As such, the investigators within the ADNI contributed to the design and implementation of ADNI and/or provided data but did not participate in analysis or writing of this report. ...
doi:10.1101/090233
fatcat:3bpr7i2jwrgylh7scw6hr42pge
A performance study of BitTorrent-like peer-to-peer systems
2007
IEEE Journal on Selected Areas in Communications
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the BitTorrent-like system is unstable, and fluctuates significantly with the changes of the number of online peers. (3) Existing systems could provide unfair services to peers, where a peer with a higher ...
decreasing peer arrival rate in a torrent, the service availability of the corresponding file becomes poor quickly, and eventually it is hard to locate and download this file. (2) Client performance in ...
Some preliminary results of this work have been presented in [27] . We would like to thank Mikel Lzal for providing BitTorrent traces to us. We appreciate Oliver Spatscheck, Keith W. ...
doi:10.1109/jsac.2007.070116
fatcat:l7s4viqnm5frpjsdxckwjjkexa
Functional connectivity within and between n-back modulated regions: An adult lifespan PPI investigation
[article]
2020
bioRxiv
pre-print
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These results suggest that FC is critical for engaging in cognitively demanding tasks, and its lack of sensitivity to healthy aging may provide a means to maintain cognition across the adult lifespan. ...
This study contributes to the literature by examining a large, adult lifespan sample, increased levels of WM load, and additional investigation of connections within and between fronto-parietal and default ...
To test whether there was an association between FC and n-back task performance across the adult lifespan, n-back performance using d' was regressed on FC of each PPI variable and network pair, age, and ...
doi:10.1101/2020.06.11.145219
fatcat:auh6frvtvjdt7lrpz3onmyhv3e
Measurements, analysis, and modeling of BitTorrent-like systems
2005
Proceedings of the 5th ACM SIGCOMM conference on Internet measurement - IMC '05
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Our analysis of representative Bit-Torrent traffic provides several new findings regarding the limitations of BitTorrent systems: (1) Due to the exponentially decreasing peer arrival rate in reality, service ...
widely with the peer population. (3) Existing systems could provide unfair services to peers, where peers with high downloading speed tend to download more and upload less. ...
Bynum provided valuable comments on an early draft of the paper. This work is partially supported by the National Science Foundation under grants CNS-0098055, CNS-0405909, and CNS-0509054/0509061. ...
doi:10.1145/1330107.1330113
fatcat:tn3hudkyrndzno4doblpwsvrby
DNA Methylation Networks Underlying Mammalian Traits
[article]
2021
bioRxiv
pre-print
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Insights uncovered by this investigation have important implications for our understanding of the role of epigenetics in mammalian evolution, aging and lifespan. ...
Analysis of the correlation between DNA methylation and species allowed us to construct phyloepigenetic trees for different tissues that parallel the phylogenetic tree. ...
The lineage that eventually led to the emergence of the first modern humans, Homo erectus, about two million years ago, with the acquisition of a larger brain, higher cognitive abilities, and several unique ...
doi:10.1101/2021.03.16.435708
fatcat:eqyiaw675vcujazztpyenp4eky
Performance analysis of a hybrid media streaming system
2003
Multimedia Computing and Networking 2004
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Recent research efforts have demonstrated the promising potential of building cost-effective media streaming systems on top of peer-to-peer (P2P) networks. ...
The unpredictable departure/failure of peers is a critical factor that affects performance of P2P systems. To model peer failures in our system, we propose the concept of peer lifespan. ...
ACKNOWLEDGMENTS The authors would like to thank Dr. ...
doi:10.1117/12.538806
fatcat:b2ivkdqznjbnblygjzbylohd3a
SynergyAge: a curated database for synergistic and antagonistic interactions of longevity-associated genes
[article]
2020
bioRxiv
pre-print
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Unfortunately, based on observations so far, there is no simple method to predict the cumulative impact of genes on lifespan. ...
While available lifespan data is continually accumulating, further understanding of the aging process is still limited by the poor understanding of epistasis and of the non-linear interactions between ...
In order to allow the user to focus on a certain part of the network, the "Emphasize selection" button can fade out the nonselected nodes. . ...
doi:10.1101/2020.04.22.054767
fatcat:agaqsnxmozglnbq7mv2ixpf2li
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