Anatomy of a Conference.
In:
23rd ACM Conference on Hypertext and Social Media, HT '12, Seiten 245-254.
ACM, Milwaukee, WI, USA, June 25-28, 2012, 2012.
Best Paper
Bjoern Elmar Macek, Christoph Scholz, Martin Atzmueller und Gerd Stumme.
[doi]
[BibTeX]
On the Predictability of Human Contacts: Influence Factors and the Strength of Stronger Ties.
In:
Proc. Fourth ASE/IEEE International Conference on Social Computing (SocialCom).
IEEE Computer Society, Boston, MA, USA, 2012.
Christoph Scholz, Martin Atzmueller und Gerd Stumme.
[doi]
[BibTeX]
Gestaltung technisch-sozialer Vernetzung in der Arbeitsorganisation: Untersuchung zur Nutzerakzeptanz von RFID-Technologie.
In:
GfA-Frühjahrskongress.
Chemnitz, 2011.
Kay Behrenbruch, Martin Atzmueller, Romy Kniewel, Sebastian Hoberg, Gerd Stumme und Ludger Schmidt.
[BibTeX]
Measuring Round Trip Times to Determine the Distance Between WLAN Nodes.
NETWORKING 2005:768-779, 2005.
André Günther und Christian Hoene.
[doi]
[Kurzfassung]
[BibTeX]
This publication explores the degree of accuracy to which the propagation delay of WLAN packets can be measured using today’s commercial, inexpensive equipment. The aim is to determine the distance between two wireless nodes for location sensing applications. We conducted experiments in which we measured the time difference between sending a data packet and receiving the corresponding immediate acknowledgement. We found the propagation delays correlate closely with distance, having only a measurement error of a few meters. Furthermore, they are more precise than received signal strength indications. To overcome the low time resolution of the given hardware timers, various statistical methods are applied, developed and analyzed. For example, we take advantage of drifting clocks to determine propagation delays that are forty times smaller than the clocks’ quantization resolution. Our approach also determines the frequency offset between remote and local crystal clocks.
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