X

Download Pollution Model PowerPoint Presentation

SlidesFinder-Advertising-Design.jpg

Login   OR  Register
X


Iframe embed code :



Presentation url :

Home / Social Issues / Social Issues Presentations / Pollution Model PowerPoint Presentation

Pollution Model PowerPoint Presentation

Ppt Presentation Embed Code   Zoom Ppt Presentation

PowerPoint is the world's most popular presentation software which can let you create professional Pollution Model powerpoint presentation easily and in no time. This helps you give your presentation on Pollution Model in a conference, a school lecture, a business proposal, in a webinar and business and professional representations.

The uploader spent his/her valuable time to create this Pollution Model powerpoint presentation slides, to share his/her useful content with the world. This ppt presentation uploaded by onlinesearch in Social Issues ppt presentation category is available for free download,and can be used according to your industries like finance, marketing, education, health and many more.

About This Presentation

Slide 1 - Understanding Pollution Dynamics in P2P File Sharing Uichin Lee, Min Choi*, Junghoo Cho M. Y. Sanadidi, Mario Gerla UCLA, KAIST* IPTPS’06
Slide 2 - Outline Pollution in P2P file sharing User behavior study Pollution model Impact on P2P traffic loads Conclusion
Slide 3 - Pollution in P2P File Sharing Pollution is a defensive mechanism to discourage illegal downloads of copyrighted materials. Polluting a title (e.g., Maroon5 – This Love) Polluters aggressively Tamper content or meta-data of files to create “polluted versions.” Pour many polluted versions into the system. Users powerlessly Encounter the polluted files with the genuine ones Randomly select one without knowing pollution.
Slide 4 - Too Many Polluted Files & Why? KaZaA is severely polluted!! Reported by Liang et al. (May, 2004) “My Band” 70% out of 1,816,663 copies Given that polluters have limited capabilities (bandwidth/processing power), current level of pollution is too high. Recent models were not able to clearly explain such pollution dynamics. To better understand pollution dynamics, P2P user behavior must be examined.
Slide 5 - User Behavior Study Goal How does user behavior impact pollution spread? User behavior study setup Two stage test Questionnaire : familiarity / usage patterns Behavior observation : awareness / slackness 30 graduate students (UCLA, KAIST)
Slide 6 - Questionnaire - Familiarity of Participants Asked five questions related to P2P Do you know how popular P2P software works? Do you know multi-part downloading or swarming? …
Slide 7 - Questionnaire - Usage Patterns P2P usage pattern 1. Download preparation: send queries/start downloading 2. Download: check download status 3. Post-download: check files/decide to share? Asked few questions related to each stage
Slide 8 - Questionnaire - Usage Patterns (Results) 3) Post-download Stage 1) Preparation Stage 2) Download Stage
Slide 9 - User Behavior Observation Metrics Awareness probability : the fraction of users who recognize pollution in a downloaded file Slackness distribution : distribution of intervals between download completion time and quality checking time Setup Modified P2P software to monitor user behavior Users are asked to use it and to download files Controlled downloading speed (50K - 1Mbps)
Slide 10 - User Behavior Observation Pollution techniques (on MP3 files) Meta-data modification : changed names Quality degradation Incomplete file : cut (30-60 seconds beg./end.) Noise insertion: every 15 seconds Shuffled content : randomly shuffled content Tested files Applied each pollution technique to four songs 40 popular songs (20 polluted + 20 clean) For each download, a user checks familiarity/pollution
Slide 11 - User Behavior Observation Awareness Shuffled Content Noise Insertion Incomplete File Quality degradation Meta-data Modification Awareness
Slide 12 - User Behavior Observation Slackness – bimodal distribution
Slide 13 - Pollution Model Discrete time analysis by extending the previous model and incorporating study results Total M users in the system G0/B0 : initial # genuine/bogus copies Download process 1. At step k, a user (never downloaded before) downloads a file with probability pS (i.e., interest level) 2. After download, the authenticity is checked after an interval k with probability sk where t <= L (max. slackness) 3. Realizes bogus with probability pa (i.e., awareness); if so, he will try again with probability pr (i.e., re-download prob.) 4. Share the file with probability pc (i.e., cooperativeness)
Slide 14 - Pollution Model # downloads at k (Nk) Ever downloaded users (Dk) # incoming genuine/bogus files at k (gk , bk) Total Gk and Bk files are shared in the system M: total number of users ps: user’s interest rate Dk: ever downloaded a file Gk: total # good files Bk: total # bogus files rk: # of re-downloads at k
Slide 15 - Pollution Model Total # genuine files (Gk+1) Total # bogus files (Bk+1) Prob. of not sharing bad files # re-downloads at k+1 L: max. slackness gk: # incoming good files at k bk: # incoming bad files at k sj: prob. of checking after j pc: cooperation probability pa: awareness probability pr: re-download probability Max Slackness: L=3 Total # checking at k: gk-2s3+ gk-1s2 + gks1
Slide 16 - Pollution Model Analysis Iterative solution of the proposed model Metric Pollution level = # polluted copies / # genuine copies Setting M=15,000 (total number of users) L=48 (max. slackness) ps = 1/24 (gets interested in every 24 hrs.) pr = 1 (re-downloads always!) pc = 0.25 (cooperativeness) Initial pollution level = 20
Slide 17 - Pollution Model Impact of user awareness Pa = 1 Polluted Files Pa = 0.9 Polluted Files Pa = 0.8 Polluted Files Pa = 1 Genuine Pa = 0.9 Genuine Pa = 0.8 Genuine
Slide 18 - Pollution Model Pollution level (k) = #polluted (k)/#genuine (k) Pa = 1 Pa = 0.95 Pa = 0.90 Pa = 0.85 Pa = 0.80 Time Step Pollution Level
Slide 19 - Pollution Model Increasing initial pollution level Awareness is critical to make an effective attack Final Pollution Level Awareness (pa) Initial pollution level
Slide 20 - Impact on P2P Traffic Loads Popular files are targets of the polluters!! Users will re-download with probability pr From our model, we can estimate the total # of re-downloads In the worst case, # of re-downloads is x3 larger!! 60% of the Internet traffic is P2P
Slide 21 - Conclusion User behavior study shows Users are not error-free in recognizing pollution Users’ slackness follows a bimodal distribution Developed an analytical model Analytic model shows Awareness is one of the key factors in pollution dynamics Pollution has a great impact on the P2P traffic loads
 

Frequently Asked Questions

> About SlidesFinder?

Slidesfinder is a website that allows users to upload and share their PowerPoint presentations online. It provides a platform for individuals and businesses to share their ideas and knowledge through presentations, and for others to view and download these presentations for educational or professional purposes.
Slidesfinder offers a wide range of presentation topics and categories, including business, education, science, technology, health, and more. Users can also search for presentations using keywords, tags, or by category. The website provides tools to create professional presentations with rich media, animations, and graphics.



One of the key features of Slidesfinder is its user-friendly interface, which allows users to easily upload, view, and share presentations. Users can also embed their presentations in their websites or blogs using the website's embed code feature.
Slidesfinder also offers premium services, such as the ability to create private presentations and to download presentations in high-quality formats. However, the basic features of Slidesfinder are free to use, making it accessible to anyone who wants to share their ideas and knowledge through presentations.

> How do I register with SlidesFinder?

Go to registration page (you can see signup link on top of website page) https://www.slidesfinder.com/signup . If you have facebook/gmail account them just click on SIGN IN WITH FACEBOOK OR SIGN IN WITH GOOGLE button, by this you will be a registered member of slidesfinder without filling any form, required detail automatically will be fatch from your account. If you do not a Facebook account, then click on "Signup". Fill all required fields and you will be a registered member of slidesfinder.

> Is slidesfinder account confirmation is mandatory?

Yes it is mandetory to active your account to login.

> Do I need to signup/login on SlidesFinder before uploading a PowerPoint presentation?

Yes, you need to login with your account before uploading presentation. Your username will be displayed on your uploaded presentation. Your registered email id is needed for sending your stats of uploaded presentation.

Slidesfinder is a sharing website for PowerPoint presentations search and share. Find your interest in the form of powerpoint presentations on slidesfinder and save your valuable time . On Slidesfinder you get presentations from our huge library of professional ppt presentations. We believe in making your search INFORMATIVE and FUN. Find your best ppt presentation from a pool of PowerPoint presentations stacked under important industry categories like business & management, heath & Wellness,eduction & training etc. We provide unique informative PowerPoint presentation for marketers, presenters and educationists. These professional PowerPoint presentations are uploaded by professionals from across numerous industry segments.These ppt presentations are available for FREE download.

Not just finding your interest, but facilitate you broadcast your interest. We have created this platform for easy sharing of PowerPoint presentations, ensuring that these presentations get maximum exposure. Create your slidesfinder account and upload PowerPoint presentations for free, share on social media platforms and BUILD YOUR CROWD WITH PRESENTATION !!

The Great Buddha says, "Share your knowledge.It’s a way to achieve immortality"! So, start sharing knowledge and we are here to make that immortal !!

© 2013-2024 SlidesFinder. All rights reserved.

Re-productivity of content are not allowed. Without prior written permission from author, commercial use of any content is illegal.