What is Twitter, a social network or a news media?
- Haewoon Kwak, Changhyun Lee, Hosung Park, S. Moon
- Computer ScienceThe Web Conference
- 26 April 2010
This work is the first quantitative study on the entire Twittersphere and information diffusion on it and finds a non-power-law follower distribution, a short effective diameter, and low reciprocity, which all mark a deviation from known characteristics of human social networks.
I tube, you tube, everybody tubes: analyzing the world's largest user generated content video system
- M. Cha, Haewoon Kwak, P. Rodriguez, Yong-Yeol Ahn, S. Moon
- Computer ScienceACM/SIGCOMM Internet Measurement Conference
- 24 October 2007
This paper analyzed YouTube, the world's largest UGC VoD system, and provided an in-depth study of the popularity life-cycle of videos, the intrinsic statistical properties of requests and their relationship with video age, and the level of content aliasing or of illegal content in the system.
Analysis of topological characteristics of huge online social networking services
- Yong-Yeol Ahn, Seungyeop Han, Haewoon Kwak, S. Moon, Hawoong Jeong
- Computer ScienceThe Web Conference
- 8 May 2007
Cyworld, MySpace, and orkut, each with more than 10 million users, are compared and it is shown that they deviate from close-knit online social networks which show a similar degree correlation pattern to real-life social networks.
PacketShader: a GPU-accelerated software router
- Sangjin Han, K. Jang, KyoungSoo Park, S. Moon
- Computer ScienceConference on Applications, Technologies…
- 16 August 2010
The evaluation results show that GPU brings significantly higher throughput over the CPU-only implementation, confirming the effectiveness of GPU for computation and memory-intensive operations in packet processing.
Measurement and modelling of the temporal dependence in packet loss
- M. Yajnik, S. Moon, J. Kurose, D. Towsley
- Computer ScienceIEEE INFOCOM '99. Conference on Computer…
- 21 March 1999
It is found that a large memory size is necessary and that the sliding windowaverage provides a more accurate estimate for the same effective memory size than the exponential smoothing or a sliding window average to estimate average loss rate.
Packet-level traffic measurements from the Sprint IP backbone
- C. Fraleigh, S. Moon, C. Diot
- Computer Science, BusinessIEEE Network
- 1 November 2003
A passive monitoring system designed to capture GPS synchronized packet-level traffic measurements on OC-3, OC-12, and OC-48 links is described, showing that some links no longer carry Web traffic as their dominant component to the benefit of file sharing and media streaming.
Analyzing the Video Popularity Characteristics of Large-Scale User Generated Content Systems
- M. Cha, Haewoon Kwak, P. Rodriguez, Yong-Yeol Ahn, S. Moon
- Computer ScienceIEEE/ACM Transactions on Networking
- 1 October 2009
This paper empirically shows how UGC services are fundamentally different from traditional VoD services, and analyzes the intrinsic statistical properties of UGC popularity distributions, which discuss opportunities to leverage the latent demand for niche videos (or the so-called "the Long Tail" potential).
Watching television over an IP network
- M. Cha, P. Rodriguez, J. Crowcroft, S. Moon, X. Amatriain
- Computer ScienceACM/SIGCOMM Internet Measurement Conference
- 20 October 2008
This paper presents the first analysis of IPTV workloads based on network traces from one of the world's largest IPTV systems, and describes the properties of viewing sessions, channel popularity dynamics, geographical locality, and channel switching behaviors.
Packet audio playout delay adjustment: performance bounds and algorithms
- S. Moon, J. Kurose, D. Towsley
- Computer ScienceMultimedia Systems
- 1998
A new adaptive delay adjustment algorithm that tracks the network delay of recently received packets and efficiently maintains delay percentile information is presented and it is shown that this algorithm outperforms existing delay adjustment algorithms over a number of measured audio delay traces and performs close to the theoretical optimum over a range of parameter values of interest.
SSLShader: Cheap SSL Acceleration with Commodity Processors
- K. Jang, Sangjin Han, Seungyeop Han, S. Moon, KyoungSoo Park
- Computer ScienceSymposium on Networked Systems Design and…
- 30 March 2011
This paper shows that modern graphics processing units (GPUs) can be easily converted to general-purpose SSL accelerators and builds a transparent SSL proxy, SSLShader, that carefully leverages the trade-offs of recent hardware features such as AESNI and NUMA and achieves both high throughput and low latency.
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