PUMA publications for /user/stumme/complexhttps://puma.uni-kassel.de/user/stumme/complexPUMA RSS feed for /user/stumme/complex2024-03-30T05:34:39+01:00The structure and function of complex networkshttps://puma.uni-kassel.de/bibtex/272bc4532c466263fde0902faee84adff/stummestumme2008-05-14T11:43:05+02:00complex free law long networks power scale tail <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="M. E. J. Newman" itemprop="url" href="/author/M.%20E.%20J.%20Newman"><span itemprop="name">M. Newman</span></a></span>. </span><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><span itemtype="http://schema.org/Periodical" itemscope="itemscope" itemprop="isPartOf"><span itemprop="name"><em>SIAM Review</em></span></span> </span>(<em><span>2003<meta content="2003" itemprop="datePublished"/></span></em>)Wed May 14 11:43:05 CEST 2008SIAM Review167The structure and function of complex networks452003complex free law long networks power scale tail How People React to a Deadline: The Distribution of Registrations of Statphys 23https://puma.uni-kassel.de/bibtex/2618251cde1e99f37344c378d4ff81cbc/stummestumme2007-11-02T14:00:49+01:00complex deadline distribution dynamics registration social statphys systems <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="V. Alfi" itemprop="url" href="/author/V.%20Alfi"><span itemprop="name">V. Alfi</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="G. Parisi" itemprop="url" href="/author/G.%20Parisi"><span itemprop="name">G. Parisi</span></a></span>, und <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="L. Pietronero" itemprop="url" href="/author/L.%20Pietronero"><span itemprop="name">L. Pietronero</span></a></span>. </span><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Abstract Book of the XXIII IUPAP International Conference on Statistical Physics</span>, </em><em>Genova, Italy, </em></span>(<em><span>9-13 July 2007<meta content="9-13 July 2007" itemprop="datePublished"/></span></em>)Fri Nov 02 14:00:49 CET 2007Genova, ItalyAbstract Book of the XXIII IUPAP International Conference on Statistical Physics9-13 JulyHow People React to a Deadline: The Distribution of Registrations of Statphys 232007complex deadline distribution dynamics registration social statphys systems In Fig. 1 we show the number of registrations to Statphys 23
(full dots).
Each point corresponds to one day and the deadline $T^*$=March 31 was
the one corresponding to the early registration and abstract submission.
We also plot the data corresponding to the a different conference
(EP2DS 17)
for which we have rescaled the total number of registration at its
own $T^*$.
The data of the two conferences are remarkably similar
and are characterized by an initial linear behavior followed
by a strong increase near $T^*$.
This strong similarity suggests for a simple mechanism to describe
the response of the people to a deadline and we propose have a
simple model.
The basic idea is that the pressure you have to register is proportional
to the inverse of the remaining time to the deadline.
This gives a probability, $p(t)$, to register at time $t$ that is $p(t)\propto
\frac 1{(T^*-t)}$.
From this the number of the registrations at time $t$ is:
$$
N(t)=C\int_{0}^{T^*}p(t)\;dt=A(N_{{tot}})\;\ln(\frac{T^*}{T^*-t}).
\nonumber
$$
The logarithmic singularity at the end is regularized by discretizing the
integral with an interval of one day and the constant $A(N_{tot})$
is fixed by the total number of final registration $N_{tot}$.
As one can see in Fig. 1 this simple model fits the
observed behavior extremely well.
This permits to predict the total number of registrations
already from the initial slope.
A result that could have some practical interest.
The model only assumes that the probability to register
is the same for the whole interval of the the remaining time.
In this respect there is no real tendency to shift the registration
towards the deadline.
The increase of pressure is just due to the approaching of the deadline.
This situation may appear curious because one could have expected
a stronger pressure to postpone the payment towards the deadline.
In this respect, however, one should notice that the data in Fig. 1
refer only to the registration and not to the payment of the fee which
could have been done also at a late time.Statistical mechanics of complex networkshttps://puma.uni-kassel.de/bibtex/21161e1dc8cfd785d62fb509b9604b14d/stummestumme2007-10-17T16:21:50+02:00albert barabasi complex mechanics networks statistical <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Reka Albert" itemprop="url" href="/author/Reka%20Albert"><span itemprop="name">R. Albert</span></a></span>, und <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Albert-Laszlo Barabasi" itemprop="url" href="/author/Albert-Laszlo%20Barabasi"><span itemprop="name">A. Barabasi</span></a></span>. </span><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><span itemtype="http://schema.org/Periodical" itemscope="itemscope" itemprop="isPartOf"><span itemprop="name"><em>Reviews of Modern Physics</em></span></span> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">74 </span></span>(<span itemprop="issueNumber">1</span>):
<span itemprop="pagination">47</span></em> </span>(<em><span>2002<meta content="2002" itemprop="datePublished"/></span></em>)Wed Oct 17 16:21:50 CEST 2007Reviews of Modern Physics147Statistical mechanics of complex networks742002albert barabasi complex mechanics networks statistical