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PRODID:http://www.ifi.informatik.uni-goettingen.de
METHOD:PUBLISH
BEGIN:VEVENT
UID:fcb5d1ddfde9e79767f6d70cc3f89d83
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Disputation -- "Network Friendly Congestion Control: Framework\, Protocol Design and Evaluation" by Mayuthan Arumaithurai
DESCRIPTION:The main part of thisthesis proposes NF-TCP\, a TCP variant for P2P and similar backgrounddelay-insensitive applications. NF-TCP aims to be submissive to delay-sensitiveapplications under congestion. It is designed to be network friendly based on a fluidflow model for intermediate queues and uses explicit congestion notification(ECN) for early detection of congestion. Moreover\, it exploits the measure of theavailable bandwidth to be able to aggressively utilize spare capacity.
CLASS:PUBLIC
DTSTART:20101122T070000Z
DTEND:20101122T080000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:84ebcc1350d6cbb62dfc070022762262
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Disputation -- "Decentralized Network Based Mobility Management: Framework\, Design and Evaluation" by Niklas Neumann
DESCRIPTION:public defense
CLASS:PUBLIC
DTSTART:20110616T121500Z
DTEND:20110616T131500Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:362c4d2c1cf2f1bc23423d84eb0f462b
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Enterprise Ready Virtual Private Clouds by Dr. K. K. Ramakrishnan
DESCRIPTION:CloudNet: Enterprise Ready Virtual Private Clouds:Cloud computing has great potential to change how enterprises run and manage their ITsystems. Cloud computing platforms provide customers with flexible\, on demand resourcesat low cost. 
CLASS:PUBLIC
DTSTART:20101122T140000Z
DTEND:20101122T150000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:51f53128174d928e3fc203784ba101da
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Sonderkolloquium: Machine Learning for Computer Security - Intelligent Defense against Novel Threats by Dr. Konrad Rieck\, TU Berlin 
DESCRIPTION:Computer systems linked to the Internet are exposed to a plethora of security threats\, ranging from zero-day exploits and stealthy attacks to computer worms and bot networks. Regular security techniques increasingly fail to protect from these threats\, as they rely onmanually crafted detection patterns and inherently lag behind attack development. The talk presents a novel approach for detection of network attacks\, which allows for automatically identifying known as well as unknown attacks. Network payloads are embedded in a vectorspace\, where a model of normal communication can be inferred using techniques from machine learning. This model enables identifying attacks as deviation from normality -- independently of the exploited vulnerabilities and the employed intrusion techniques. Empirically\, this ability can be demonstrated on real network traffic\, where a prototype detects 80-97% of the unknown attacks with less than 0.002% false positives and throughput rates between 26-60 Mbit/s
CLASS:PUBLIC
DTSTART:20101201T080000Z
DTEND:20101201T090000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:86a91ec3e4169d35fca07d00b44e1289
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Sonderkolloquium: Securely Exchanging RFID Events by Dr. Florian Kerschbaum\, SAP Research\, Karlsruhe
DESCRIPTION:More and more companies are collecting item-specific information using RFID equipped goods. The full benefit of this information can only be gained by exchanging it in the supply chain. Nevertheless companies are reluctant to do so\, because the information is sensitive. Furthermore\, specifying fair and secure policies can be very difficult.  In the first part of the presentation I will present a policy model that makes specifying these policies easy. In the second part of the presentation I will present an authentication method that can be used to enforce these policies.  The authentication is based on a novel use of proxy re-encryption and provably secure.  Altogether one can now efficiently specify and enforce access control policies for secure exchanging RFID events.
CLASS:PUBLIC
DTSTART:20101201T120000Z
DTEND:20101201T130000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:ae6113e18aa63c254d66bbde9eb5d8ce
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Sonderkolloquium: Physical Security in Wireless Networks: Nature Meets Theory by Dr. Ivan Martinovic\, University of Kaiserslautern
DESCRIPTION:Security in wireless networks is a notorious problem\, suffering from the following dilemma: On the one hand\, the wireless (broadcast) medium access puts the attacker into a much better position\, on the other hand wireless devices most often have resource deficiencies (processing\, memory\, energy) which make conventional attack countermeasures based on cryptographic solutions impractical. Though\, there have been many approaches towardslightweight security for wireless networks\, this dilemma always persists\, at least for the low-cost sector\, say\, for example\, sensor networks or RFIDs. So far the overwhelming majority of wireless security approaches followed a conventional security paradigm which abstracts thephysical communication as a logical channel. We depart from this paradigm\, and try to leverage from the physical characteristics of wireless communications as much as possible\, thus bringing us again in equality of arms with the attacker. This we coined the security by wireless designs can lead to interesting security solutions.
CLASS:PUBLIC
DTSTART:20101213T060000Z
DTEND:20101213T070000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:bace45a790c2977fef81c23d79263802
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Sonderkolloquium: Security Analysis using Formal Methods: the Case of Electronic Voting Systems by Dr. Komminist S. Weldemariam\, Fondazione Bruno Kessler (Italy)
DESCRIPTION:The fast-paced diffusion of ICTs and the transition to a new form of system in numerous walks of life not only offers attractive benefits but also emerges with side issues worth considering. For instance\, recently we have seen that several currently deployed e-voting systems share critical failures in their design and implementation\, which render their technical and procedural controls insufficient to guarantee trustworthy voting. The application of formal software engineering would greatly help to better address problems associated with certification against standards. Namely\, it would help to understand the requirements of systems and by thoroughly specifying and analyzing the underlying assumptions and security specific properties (related to the system\, underlying network infrastructures as well as their interactions)\, and would improve the trustworthiness of the final systems.  In this talk\, we present one of our works related to the security analysis of electronic voting system. First\, we apply existing techniques and defining novel methodologies and approaches for the security verification of procedural rich systems using model checkers. Second\, we investigate the usage of formal methods to study and analyze the security of currently deployed system in order to build the next generation (e-voting) systems. 
CLASS:PUBLIC
DTSTART:20101213T120000Z
DTEND:20101213T130000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:0d99d21556ef9b6e79206956f3b435d7
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Overlay-based Service on Mobile Devices: Overcoming Intermittent Connectivity and Energy Limitations by Dr. Oliver Waldhorst
DESCRIPTION:Due to the steadily increasing number of mobile personal devices there is an obvious need for their integration into network(ed) services and applications. This bears several challenges\, since device connectivity is intermittent an and energy resources are scarce.The first part of the talk is dedicated to delay tolerant networking (DTN) approaches for coping with intermittent connectivity. Although the impact of people\\'s social contacts on DTN performance is well understood\, few attention has been paid to the fact that the streets that people move on affect the number of contacts they make. We present simulation results and numerical analysis that shows that there is indeed a correlation between the topologies of cities like New Dehli\, Karlsruhe and New York and the performance of DTN protocols\, that can be exploited for performance optimization.In the second part of the talk we explore how an energy-aware service selection policy can increase service availability and system lifetime. As building block for such policy\, we introduce a generic energy estimator for predicting the energy consumption of an arbitrary service before its invocation. The estimator does not rely on dedicated hardware or extensive measurements for each service in a laboratory setting. We show in real-world measurements that the predictions have high accuracy. Furthermore\, a prototype implementation provides evidence that the combination of energy-estimator and energy-aware service selection indeed increases services availability.
CLASS:PUBLIC
DTSTART:20101214T120000Z
DTEND:20101214T140000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:2841b39ca246820536607a8f3eb21e83
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Sonderkolloquium - eScience -: Clouds & Service-Oriented Computing by Prof. Dr.-Ing. Ramin Yahyapour\, IT und Medien Centrum (ITMC)\, TU Dortmund
DESCRIPTION:Die Bereitstellung und Nutzung von IT-Ressourcen hat in den letzten Jahren einen wesentlichen Wandel durchlaufen. Cloud Computing und service-orientierte Infrastrukturenbieten hohe Flexibilität und Agilität bei gleichzeitig gesteigerter Effizienz. Das Management von solchen Cloud- und Grid-Diensten stellt eine komplexe Herausforderung unter diversen Optimierungszielen wie z.B. Kosten\, Dienstgüte oder Verfügbarkeit dar\, die sowohl für eScience als auch für kommerzielle Anwendungen von Relevanz sind. In dem Vortrag werden exemplarisch Aspekte und Lösungswege aufgezeigt.
CLASS:PUBLIC
DTSTART:20101217T070000Z
DTEND:20101217T080000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:d95abd0948b86bddb4b26cc9b399f6f7
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Sonderkolloquium - eScience -: Herausforderungen für die Electronic Science auf dem Weg zu Exascale Rechnern by Dr. Matthias Müller\, TU Dresden
DESCRIPTION:Die Leistungsfähigkeit von Rechnern wächst nach wie vor rasant. Schon 2018 könnte es daher die ersten Rechner geben\, die mehr als 10<sup>18</sup> Fließkommazahlberechnungen pro Sekunde durchführen können. Um dieses Ziel zu erreichen und die Leistungsfähigkeit durch Anwendungen zu nutzen\, müssen zahlreiche Herausforderungen bewältigt werden. Dienotwendige Steigerung der Energieeffizienz ist ein Beispiel\, welches im Vortrag erläutert wird. Daneben werden auch Methoden und Werkzeuge vorgestellt\, um die Anwendungsentwicklung zu unterstützen. So können viele Fehler in parallelen Programmen durch eine Laufzeitfehlererkennung entdeckt und analysiert werden. Auch für die Analyse der Performance und Energieeffizienz von Anwendungen wird eine Softwareumgebung präsentiert.
CLASS:PUBLIC
DTSTART:20101217T140000Z
DTEND:20101217T150000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:b17a1dfa35b3ed50cf7955d981c1e686
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Sonderkolloquium - eScience -: Konsolidierung komplexer IT Landschaften by Dr. Kamal Kumar Bhattacharya\, IBM Watson Research Lab (USA)
DESCRIPTION:IT Konsolidierung ist heute für viele CIOs eine absolute Notwendigkeit geworden\, um dem wachsenden Bedarf für neue Unternehmensanwendungen\, exponentiell ansteigenden Datenmengen und auch wachsender Energiekosten entgegenzutreten. Rechenzentren sind oftmals überfüllt und Rechner laufen weit unter ihrem Nutzungspotenzial. Virtualisierung  genießt den Ruf eines Allheilmittels\, welches erlaubt IT Landschaften zu konsolidieren\, um Platz zu schaffen und Energiekosten zu reduzieren. Allerdings zeigt die Realität\, dass die Virtualisierung von komplexen IT Landschaften\, wie man sie derzeit weltweit in Rechenzentren vorfindet\, ein kompliziertes und risikobehaftetes Unterfangen ist. Weiterhin ist es unklar\, wie Virtualisierung die stetig steigenden Kosten der Server-Administration reduziert.
CLASS:PUBLIC
DTSTART:20101218T070000Z
DTEND:20101218T080000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:6a31dad14f7e6be7e0d8e1daa2a7874e
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Sonderkolloquium - eScience -: Mehrskalen / Multiphysik: Interdisziplinäre Projekte in verteilten Umgebungen by Prof. Dr.-Ing. Sabine Roller\, German Research School for Simulation Sciences GmbH\, Aachen
DESCRIPTION:In den vergangenen Jahren konnten zwei Entwicklungen im Bereich der Computer-Anwendungen beobachtet werden: zum einen haben viele Einzelanwendungen einen Reifegrad erreicht\, der es ermöglicht\, sie als Standard-Werkzeug in Forschung und Entwicklung einzusetzen. Nun werden diese Einzelanwendungen zu komplexeren\, Mehrskalen und/oder Multi-Physik Anwendungen kombiniert\, die mehrere Aspekte und deren Wechselwirkungen simultan betrachten. Häufig arbeiten dabei mehrere Forschungsgruppen zusammen\, die ihre jeweiligen Spezialisierungen einbringen. Diese Gruppen sind typischerweise nicht im selben Institut\, sondern arbeiten räumlich verteilt. Dabei kommen immer häufiger- das ist die zweite Beobachtung- auch Nutzergruppen hinzu\, die weniger computer- bzw. programmieraffin sind. Es sind daher neue kollaborative Umgebungen notwendig\, die insbesondere den Zugang zu Simulationsanwendungen\, sowie die Verbindung klassischer Simulationen mit Daten zulässt\, die in internen Datenbanken oder im Internet vorhanden sind. Der Vortrag wird Beispiele gekoppelter Anwendungen aus unterschiedlichen Bereichen vorstellen und beleuchten\, wie dies die Bereitstellung der Dienste durch Rechenzentren beeinflußt.
CLASS:PUBLIC
DTSTART:20101218T140000Z
DTEND:20101218T150000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:cc56d08b1706987cc884fa32e93f0422
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Sonderkolloquium - eScience -: Produktivität und Nachhaltigkeit in der simulationsbasierten Wissenschaft by Prof. Dr. Christian Bischof\, RWTH Aachen
DESCRIPTION:Die Fähigkeiten von Hardware\, sei es Rechner\, Speicher oder Netzwerke\, wachsen rapide. Die Produktivität der Software-Erstellung zur Nutzung der neuen Möglichkeiten steigt aber nicht in demselben Maße\, eine Tatsache\, die oft als die Software-Lücke bezeichnet wird. Auch werden die berechneten Daten oft nicht hinreichend genau und sorgfältig hinterfragt\, da es an intuitiven Paradigmen des Umgangs mangelt. Schließlich sind die Daten sowie der softwarebasierte Workflow\, der zu veröffentlichten wissenschaftlichen Schlussfolgerungen führte\, oft nach relativ kurzer Zeit nicht rekonstruierbar\, da es\, gerade bei interdisziplinären Fragestellungen\, an etablierten Prozessen zur Dokumentation von rechengestützten wissenschaftlichen Wertschöpfungsprozessen mangelt.In diesem Vortrag werden Lösungsansätze vorgestellt\, welche diese Fragestellungen adressieren: 1) Das automatische Differenzieren zur Erstellung von Ableitungscodes\, wie sie in der Sensitivitätsanalyse\, Parameterschätzung oder Optimierung benötigt werden.2) Verfahren der virtuellen Realität\, um komplizierte Simulationsphänomene interaktiv und explorativ zu hinterfragen.3) Niederschwellig nutzbare Repositories für interdisziplinäre Forschung im Kontext einer universitären IT Servicelandschaft.
CLASS:PUBLIC
DTSTART:20101220T070000Z
DTEND:20101220T080000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:55cb2559ef4cb6ece93193d28b70c134
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Sonderkolloquium - eScience -: Cloud Computing und Wissenschaftliches Rechnen by Junior-Prof. Dr.-Ing. André Brinkmann\, Universität Paderborn 
DESCRIPTION:Kaum ein anderes Thema bewegt die IT-Landschaft derzeit so stark wie das Cloud Computing. Speziell auf dem Gebiet des wissenschaftlichen Rechnens kann den Nutzern durch die neuen Zugangs- und Betriebskonzepte ein deutlich einfacherer Zugriff auf Simulationsumgebungen bereitgestellt werden. Der effiziente Betrieb einer Cloud Infrastruktur erfordert aber die Beantwortung einer Reihe neuer (wissenschaftlicher) Fragestellungen\, die bei der Steuerung paralleler Anwendungen in virtualisierten Umgebungen starten\, die Nutzung von Hardware-Beschleunigern betrachten und auch die Langzeitarchivierung der gespeicherten Simulationsumgebungen sowie die Wiederherstellbarkeit der berechneten Ergebnisse beinhalten. Anhand beispielhafter Anwendungen werden diese Fragestellungen in diesem Vortrag diskutiert und es wird dem Zuhörer ermöglicht\, die Chancen des Cloud Computings für das wissenschaftliche Rechnen einschätzen zu können.
CLASS:PUBLIC
DTSTART:20101220T140000Z
DTEND:20101220T150000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:c4faf887a5942db946679226f2548e69
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Where Technology Meets Policy - Network Neutrality by Prof. Dr. Henning Schulzrinne
DESCRIPTION:In the last few years\, large parts of the Internet community have debated the topic of "network neutrality"\, a somewhat-clumsy term describing that the Internet should treat all content and packets equally. Recently\, the United States Federal Communications Commission (FCC) has issued a set of guidelines in the Open Internet Report and Order that provide the first formal codification of the concept. I participated in the drafting of the document. I will describe what network neutrality is\, why it is important and why it is very difficult to translate into policy. Network neutrality is usually framed as an issue of prioritization and blocking\, but it is at least as much about the economic model for the Internet. In short\, depending on the outcome of the debate\, the Internet of the future may look like an airline or like the postal service. As part of the talk\, I will also briefly introduce the issue of policy making and how it affects telecommunications and the Internet - and networking research.
CLASS:PUBLIC
DTSTART:20110124T120000Z
DTEND:20110124T133000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:46460ff62d116185744c2fbffc8d2eb9
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Wireless mesh network with different wireless technologies by Dr. Fang-Chun Kuo
DESCRIPTION:With the increasing demand on backhaul capacity and the immense cost pressure on mobile backhaul solutions\, meshed wireless mobile backhauls have been identified as a promising evolution.  However\, current mobile backhauls are predominantly deployed in tree or ring topologies\, which simplify traffic management. Hence\, we analyzed the topology deployment problem in wireless mobile backhaul in a systematically way. The analysis results show that meshed wireless backhaul topologies are a cost-effective alternative to trees and rings\, in particular in the face of spatial and temporal fluctuation of traffic demand and protection against link failures.Furthermore\, recently there is also growing interest in the industry and academia to use the unlicensed 60 GHz band for offering multi-Gigabit data transmission for short range wireless communication. However\, the  properties of 60GHz radio\, directional antennas and link blockage problem\, introduce new challenges for the higher layer protocol design. Mesh networks are proposed to extend the limited range 60 GHz communication to cover larger area. In this talk\, the unique challenges for constructing  mesh 60 GHz networks are analyzed and discussed.
CLASS:PUBLIC
DTSTART:20110307T130000Z
DTEND:20110307T140000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:d9d77e6863c64260611ffee1e500b028
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- I-seismograph: Observing and Measuring Internet Earthquakes by Prof. Jun Li
DESCRIPTION:Disruptive events such as large-scale power outages\, undersea cable cuts\, or Internet worms could cause the Internet to deviate from its normal state of operation.  This deviation from normalcy is what we call the impaction the Internet\, which we also refer to as an "Internet earthquake." As the Internet is a large\, complex moving target\, to date there has been little successful research on how to observe and quantify the impact on the Internet\, whether it is during specific event periods or in real time.In this talk\, we describe an Internet seismograph\, or I-seismograph\, to provide a "Richter scale" for the Internet.  Since routing is the most basic function of the Internet and the Border Gateway Protocol (BGP) is the de facto standard inter-domain routing protocol\, we focus on BGP. After defining what "impact" means with respect to BGP\, we describe howI-seismograph measures the impact\, exemplify its usage with several disruptive events\, and further validate its accuracy and consistency.  We show that we can evaluate the impact on BGP during an arbitrary period\, including doing so in real time
CLASS:PUBLIC
DTSTART:20110504T080000Z
DTEND:20110504T100000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:a91d51d931ea60fa515c42d08763e102
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- On Power and Throughput Tradeoffs of WiFi and Bluetooth  in Smartphones by Prof. Roy Friedmann
DESCRIPTION:Smartphones are quickly becoming the main computing and (data) communication platform. These days\, smartphones are all equipped with Bluetooth and WiFi\, which complement their cellular communication capabilities. Bluetooth was originally placed in mobile phones for personal-area communication\, such as wireless earphones\, synchronization with a nearby PC\, and tethering. WiFi was added more recently in order to improve the users' Web surfing experience whenever a WiFi access point is available. Market research predict that in the very near future WiFi equipped smartphones will outnumber all other WiFi enabled devices combined (laptops\, tablets\, WiFi  enabled TVs\, etc.).Being battery operated\, power depletion is a major concern in smartphones design and usage. In particular\, it is widely known that wireless communication is a significant source of energy consumption. Hence\, having a better understanding of the way wireless communication impacts battery drain and the tradeoff between bandwidth usage and power consumption is important. 
CLASS:PUBLIC
DTSTART:20110614T080000Z
DTEND:20110614T100000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:7e2834e8d8147ea388dc6b1c938fc4ca
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Is human dynamics ultra-bursty? by Dr. Jan Nagler
DESCRIPTION:The dynamics of technological\, economical phenomena as well as social systems are often driven by individual human actions. The exact timing of a single action can impact the network dynamics on a global scale. We investigated high-frequent human activity patterns. Time-lag probability density functions are revealed to be of an ultrabroad type. The characterizing exponents are approximately Gamma-distributed. As a consequence\, we establish that the virability of individual ultrabroad inter-event distributions serves as a plausible explanation for the ubiquitous bursty (non-ultrabraod) power law behavior in human dynamics.
CLASS:PUBLIC
DTSTART:20110617T080000Z
DTEND:20110617T100000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:66cd94801d7880dc720f94562dbdfd09
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Coordination in group movements: Ideal patterns by Prof. Dr. Margarete Boos\, Georg-Elias-Müller-Institut für Psychologie\, Universität Göttingen
DESCRIPTION:Aim of the study: To examine patterns and results of coordinated group movement. Methods: Experimental paradigm based on a computer-supported virtual movement game via a local computer network. 10 participants per group (N=40 groups) move on a hexagon field coordinating their behavior depending on experimentally manipulated incentive and communication structures. Movement patterns and consensus are measured via temporal (latencies) and spatial (distances) criteria.Results: (1) A human group is able to reach consensus\, using movement as source of information only. (2) An informed minority is able to “lead” an uninformed majority to a consensus. (3) This consensus will be reached with the same success rates under global and local perception radius. (4) Informed individuals lead successfully when moving fast and consistently and when using similar paths.Conclusions: Principles of group movements – cohesion\, alignment and ideal movement patterns of informed group members - might optimise crowd behavior and evacuation planning
CLASS:PUBLIC
DTSTART:20110622T140000Z
DTEND:20110622T160000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:dd3ae95eefde9d06e0a07bed5a484f6a
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Anonymity measurement: metrics and challenges by Somayeh Taheri
DESCRIPTION:Privacy deals with making control on how\, when and to what extent one's personal information is communicated to others. Privacy is an important requirement in most of the communication networks. Privacy is not absolute and in order to compare two different private systems\, privacy measurement tools are necessary.This talk would be about privacy measurement and will include the state-of-the-art as well as a report of a work in progress on anonymity measurement. We will review the requirements of privacy metrics and the main existing measures. Then we will discuss the challenges and the shortcomings of the existing approaches. Finally an idea toward a new privacy measurement metric will be proposed. In developing this idea\, as a work in progress\, we are trying to overcom the shortcomings of the other aproaches to design a proper tool to evaluate privacy in private systems.
CLASS:PUBLIC
DTSTART:20110715T150000Z
DTEND:20110715T160000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:06caed7fb3a290a273af94ca968c74a1
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Exploiting Unlabeled Data with Multiple Views by Prof. Dr. Zhi-Hua Zhou (Nanjing University\, China)
DESCRIPTION:In many real applications there are abundant unlabeled data but the amount of labeled training examples are limited\, since labeling the data requires extensive human effort and expertise. To effectively utilize unlabeled data to help improve performance\, semi-supervised learning and active learning have attracted much attention during the past decade. It is noteworthy that when the data have multiple views\, such as in cross-media applications\, helpful information contained in the multi-views will be able to enable strong process of semi-supervised learning and active learning. In this talk we will introduce some advances in this area.
CLASS:PUBLIC
DTSTART:20110912T080000Z
DTEND:20110912T093000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:12b8f17d5f6866d9b13aa744e3cc334a
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Success and Failures of Enterprise Storage Systems by Carsten Haak (Practice Manager Enterprise Storage EMEA bei EMC)
DESCRIPTION:Within this talk\, Carsten Haak presents an overview on thehistory and on the technical development of enterprise storage systems.This includes successful and especially failed implementations of enterprise storage systems by describing the reasons for their implementation and for their failures. Afterwards\, Mr. Haak presents the state of the art of enterprise storage systems. He discusses de-factostandards and proprietary solution by giving an outlook and new challenges on implementing enterprise storage systems.
CLASS:PUBLIC
DTSTART:20110928T121500Z
DTEND:20110928T140000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:f1a32f0f869f36030b790529485b6f6c
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Efficient Privacy-Preserving Network Communications: Design and Analysis by Prof. Dr. Jian Ren
DESCRIPTION:Source-location privacy is an important security issue for wireless sensor networks (WSNs). Lack of location privacy can cause exposure of significant information about traffic carried on the network and the physical world entities. While confidentiality of a message can be ensured through content encryption\, it is much more difficult to adequately address source-location privacy since there is always certain correlation between traffic pattern and source-location information. Using certain equipments to monitor the transmission direction of any detected message\, adversaries can easily trace back to the source node hop by hop or deduce the location of the source node through traffic analysis. In this talk\, we will first present some practical quantitative evaluation criteria for source-Location privacy measurement.  We will demonstrate the effectiveness of our proposed evaluation criteria against some well-known network protocols.  Based on these criteria\, we propose several efficient and secure source-location privacy protocol design.  We provide theoretical security analysis of the proposed schemes.   It is well-known that security and efficiency are generally two conflicting issues in network protocol design.  In this talk\, we will present a design methodology that can balance these two conflicting requirements.  In particularly\, we will describe a scheme that can maximize the security protection for a give cost factor\, while maximizing the sensor network lifetime.    In the end of this talk\, I will briefly talk about some research projects currently going on in the Cyber Security Lab at Michigan State University.  
CLASS:PUBLIC
DTSTART:20111213T070000Z
DTEND:20111213T090000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:932a656654d9ed0cd3448fcade064bcd
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- MSM behavior network and its public health significance in China by Dr. Nan Zheng\, Center for Public Health Research\, Medical School\, Nanjing University/China
DESCRIPTION:Internet chat rooms\, instant messaging\, and other online methods are becoming favored venues for MSM (Men who have sex with men) to seek and interact with sexual partners. Therefore\, using the Internet as a data source\, it will be possible to analyze the structure of MSM networks. The frequency of contacts\, the number of partners\, and the scope of the interaction can be investigated by exploring those data. In addition\, the knowledge gained from the survey and the data analysis reveals an insight on special behavior and thus allows calculating group-specific risks of contracting HIV and other Sexually Transmitted Diseases (STDs). Considering the fact that different roles and behaviors of MSM lead to different risk of infection\, new epidemiological models beyond the current ones which assume an equal chance of infection for each individual would be necessary for understanding the transmission of HIV and other STDs in an MSM social network. 
CLASS:PUBLIC
DTSTART:20111220T123000Z
DTEND:20111220T140000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:7ceb6d4364bda2c1facfe04a4f9ac8bf
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Automated Malware Analysis by Prof. Dr. Christopher Kruegel
DESCRIPTION:Malicious software (malware) is an important threat and root cause of many security problemson the Internet. In this talk\, I will discuss our recent efforts on malware analysis\, detection\, andmitigation. First\, I will introduce our infrastructure to collect and analyze malicious code samples.Then\, I will present techniques to improve the quality of the results produced by automated\,dynamic malware analysis systems. Finally\, I will discuss ways in which these results can beleveraged for the detection and mitigation of malicious code.
CLASS:PUBLIC
DTSTART:20120508T140000Z
DTEND:20120508T160000Z
DTSTAMP:20120516T132300Z
END:VEVENT
BEGIN:VEVENT
UID:1bfd918a787423040f8ffb64f182bb43
ORGANIZER:MAILTO:office@informatik.uni-goettingen.de
SUMMARY:Colloquium -- Evolutionary Multiobjective Optimization for Green Clouds by Associate Professor Dr. Jun Suzuki
DESCRIPTION:As Internet data centers (IDCs) have been increasing in scale and complexity\, they are currently a significant source of energy consumption and CO2 emission. Green Monster is a framework to operate a federation (i.e.\, cloud) of IDCs in a “green” way. It dynamically moves services (i.e.\, workload) across IDCs for reducing their carbon footprint while maintaining their performance. It makes decisions of service migration and placement with an evolutionary multiobjective optimization algorithm (EMOA) that evolves a set of solution candidates through global and local search processes. The proposed EMOA considers conflicting optimization objectives (e.g.\, renewable energy consumption and performance) and seeks the Pareto-optimal solutions by balancing the trade-offs among those objectives subject to a given capacity constraint for each IDC. This presentation will overview the design of the proposed EMOA and provide a series of simulation results.
CLASS:PUBLIC
DTSTART:20120530T141500Z
DTEND:20120530T160000Z
DTSTAMP:20120516T132300Z
END:VEVENT
END:VCALENDAR