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<p class="MsoPlainText">Dear Academic and Research Staff, and Research Students<o:p></o:p></p>
<p class="MsoPlainText"> <o:p></o:p></p>
<p class="MsoPlainText">We recently advertised for Faculty Position in Networking and Systems. One of the shortlisted candidates will be coming to visit the department and give a seminar on Tuesday 19<sup>th</sup> March 2013. All academic staff are strongly
encouraged to attend these talks. <o:p></o:p></p>
<p class="MsoPlainText"> <o:p></o:p></p>
<p class="MsoPlainText">Seminars typically last an hour and fifteen minutes including questions.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Kind Regards<o:p></o:p></p>
<p class="MsoPlainText">Dee Patel<o:p></o:p></p>
<p class="MsoPlainText"> <o:p></o:p></p>
<p class="MsoPlainText">__________ __________ __________<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><b><span style="color:#4F81BD">Speaker: David Choffnes<o:p></o:p></span></b></p>
<p class="MsoPlainText"><b><span style="color:#4F81BD">From: University of Washington<o:p></o:p></span></b></p>
<p class="MsoPlainText"><b><span style="color:#4F81BD">Date: </span><span style="color:#1F497D">TODAY</span><span style="color:#4F81BD"><o:p></o:p></span></b></p>
<p class="MsoPlainText"><b>Time: 14:00<o:p></o:p></b></p>
<p class="MsoPlainText"><b><span style="color:#4F81BD">Location: Christopher Ingold XLG1 Chemistry LT<o:p></o:p></span></b></p>
<p class="MsoPlainText"><span style="color:#4F81BD"> <o:p></o:p></span></p>
<p class="MsoPlainText"><b><span style="color:#4F81BD">Title:</span></b><span style="color:#4F81BD"> Diagnosing and Repairing Internet Performance Problems<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:#4F81BD"><o:p> </o:p></span></p>
<p class="MsoPlainText"><b><span style="color:#4F81BD">Abstract:</span></b><span style="color:#4F81BD"> We increasingly depend on Internet connectivity and performance for services ranging from telephony and video streaming to home monitoring and remote health
care. However, hardware failures, misconfigurations, and software bugs frequently cause outages and other performance problems that disrupt these services. Existing tools provide network operators with only limited visibility into these problems and few options
to address them. The result is that debugging Internet problems is often a slow, manual process.<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:#4F81BD"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="color:#4F81BD">In this talk, I discuss how we can improve Internet reliability by enabling better tools for detecting, isolating, and repairing network problems as they occur. First, I discuss a system for crowdsourcing
network monitoring to end systems. By leveraging the network view from applications running on a large number of hosts, we can efficiently detect network problems that impact end-to-end performance. Second, I describe a system for isolating the network responsible
for a problem.<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:#4F81BD">To address this, we develop new tools that allow an ISP to identify the root cause even when portions of the Internet are unreachable.<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:#4F81BD">Third, I present an approach for automatically repairing isolated network problems. This allows an ISP to use existing routing protocols in novel ways to cause other networks to avoid problems, thus restoring
normal connectivity.<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:#4F81BD"><o:p> </o:p></span></p>
<p class="MsoPlainText"><b><span style="color:#4F81BD">Bio:</span></b><span style="color:#4F81BD"> David Choffnes earned his Ph.D. in Computer Science from Northwestern University in 2010 and is currently a postdoctoral research associate at the University
of Washington. His research interests are primarily in the areas of distributed systems and networking, with a recent focus on mobile systems. He has coauthored three textbooks in computer science and programming, and has been awarded the CRA/NSF Computing
Innovation Fellowship as well as the Outstanding Dissertation Award from Northwestern University.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Kind Regards <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Dee Patel <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Staff Recruitment & HR Assistant<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">UCL Department of Computer Science
<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="color:black;mso-fareast-language:EN-GB">Office:
</span></b><span style="color:black;mso-fareast-language:EN-GB">5.07<br>
<b>Tel:</b> +44 (0)20 3108 1622 (Direct Dial)<br>
<b>Internal:</b> 51622<br>
<b>Fax:</b> +44 (0)20 7387 1397</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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