TY - GEN
AU - Wolff, Birgitta
AU - Sureth-Sloane, Caren
AU - Weissenberger, Barbara
ID - 17718
IS - 293
T2 - Frankfurter Allgemeine Zeitung
TI - BWL greift gesellschaftlichen Wandel auf
ER -
TY - CONF
AB - Angegebener Monat: September 2018
AU - Büker, Petra
ID - 19776
TI - Grundschule im Wandel. Bildung heute für die Welt von morgen. Keynote anlässlich des 1. Delbrücker Grundschultages: „50 Jahre Schulform Grundschule“. Initiiert vom Arbeitskreis Delbrücker Grundschulen
ER -
TY - JOUR
AU - Sahoo, Sudhir
AU - Kormath Madam Raghupathy, Ramya
AU - Kühne, Thomas D.
AU - Mirhosseini, Hossein
ID - 13209
IS - 37
JF - J. Phys. Chem. C
TI - Theoretical Investigation of Interaction of CuInSe2 Absorber Material with Oxygen, Hydrogen, and Water
VL - 122
ER -
TY - JOUR
AB - A bifurcation is a qualitative change in a family of solutions to an equation produced by varying parameters. In contrast to the local bifurcations of dynamical systems that are often related to a change in the number or stability of equilibria, bifurcations of boundary value problems are global in nature and may not be related to any obvious change in dynamical behaviour. Catastrophe theory is a well-developed framework which studies the bifurcations of critical points of functions. In this paper we study the bifurcations of solutions of boundary-value problems for symplectic maps, using the language of (finite-dimensional) singularity theory. We associate certain such problems with a geometric picture involving the intersection of Lagrangian submanifolds, and hence with the critical points of a suitable generating function. Within this framework, we then study the effect of three special cases: (i) some common boundary conditions, such as Dirichlet boundary conditions for second-order systems, restrict the possible types of bifurcations (for example, in generic planar systems only the A-series beginning with folds and cusps can occur); (ii) integrable systems, such as planar Hamiltonian systems, can exhibit a novel periodic pitchfork bifurcation; and (iii) systems with Hamiltonian symmetries or reversing symmetries can exhibit restricted bifurcations associated with the symmetry. This approach offers an alternative to the analysis of critical points in function spaces, typically used in the study of bifurcation of variational problems, and opens the way to the detection of more exotic bifurcations than the simple folds and cusps that are often found in examples.
AU - McLachlan, Robert I
AU - Offen, Christian
ID - 19935
JF - Nonlinearity
SN - 0951-7715
TI - Bifurcation of solutions to Hamiltonian boundary value problems
ER -
TY - CONF
AU - Hamann, Heiko
AU - Markarian, Christine
AU - Meyer auf der Heide, Friedhelm
AU - Wahby, Mostafa
ID - 2850
T2 - Ninth International Conference on Fun with Algorithms (FUN)
TI - Pick, Pack, & Survive: Charging Robots in a Modern Warehouse based on Online Connected Dominating Sets
ER -
TY - GEN
AB - We introduce the \emph{Online Connected Dominating Set Leasing} problem
(OCDSL) in which we are given an undirected connected graph $G = (V, E)$, a set
$\mathcal{L}$ of lease types each characterized by a duration and cost, and a
sequence of subsets of $V$ arriving over time. A node can be leased using lease
type $l$ for cost $c_l$ and remains active for time $d_l$. The adversary gives
in each step $t$ a subset of nodes that need to be dominated by a connected
subgraph consisting of nodes active at time $t$. The goal is to minimize the
total leasing costs. OCDSL contains the \emph{Parking Permit
Problem}~\cite{PPP} as a special subcase and generalizes the classical offline
\emph{Connected Dominating Set} problem~\cite{Guha1998}. It has an $\Omega(\log
^2 n + \log |\mathcal{L}|)$ randomized lower bound resulting from lower bounds
for the \emph{Parking Permit Problem} and the \emph{Online Set Cover}
problem~\cite{Alon:2003:OSC:780542.780558,Korman}, where $|\mathcal{L}|$ is the
number of available lease types and $n$ is the number of nodes in the input
graph. We give a randomized $\mathcal{O}(\log ^2 n + \log |\mathcal{L}| \log
n)$-competitive algorithm for OCDSL. We also give a deterministic algorithm for
a variant of OCDSL in which the dominating subgraph need not be connected, the
\emph{Online Dominating Set Leasing} problem. The latter is based on a simple
primal-dual approach and has an $\mathcal{O}(|\mathcal{L}| \cdot
\Delta)$-competitive ratio, where $\Delta$ is the maximum degree of the input
graph.
AU - Markarian, Christine
ID - 19978
T2 - arXiv:1805.02994
TI - Online Connected Dominating Set Leasing
ER -
TY - GEN
AU - Schnuer, Jan-Philip
ID - 3365
TI - Static Scheduling Algorithms for Heterogeneous Compute Nodes
ER -
TY - GEN
AB - Molecular Dynamic (MD) simulations are computationally intensive and accelerating them using specialized hardware is a topic of investigation in many studies. One of the routines in the critical path of MD simulations is the three-dimensional Fast Fourier Transformation (FFT3d). The potential in accelerating FFT3d using hardware is usually bound by bandwidth and memory. Therefore, designing a high throughput solution for an FPGA that overcomes this problem is challenging.
In this thesis, the feasibility of offloading FFT3d computations to FPGA implemented using OpenCL is investigated. In order to mask the latency in memory access, an FFT3d that overlaps computation with communication is designed. The implementa- tion of this design is synthesized for the Arria 10 GX 1150 FPGA and evaluated with the FFTW benchmark. Analysis shows a better performance using FPGA over CPU for larger FFT sizes, with the 643 FFT showing a 70% improvement in runtime using FPGAs.
This FFT3d design is integrated with CP2K to explore the potential in accelerating molecular dynamic simulations. Evaluation of CP2K simulations using FPGA shows a 41% improvement in runtime in FFT3d computations over CPU for larger FFT3d designs.
AU - Ramaswami, Arjun
ID - 5417
KW - FFT: FPGA
KW - CP2K
KW - OpenCL
TI - Accelerating Molecular Dynamic Simulations by Offloading Fast Fourier Transformations to FPGA
ER -
TY - GEN
AU - Mikroökonomie, Lehrstuhl
ID - 9926
TI - Agenda setting in jury decision by sequential majority voting
ER -
TY - GEN
AU - Gräper, Gerrit
ID - 4806
TI - The Suitability of Equilibrium Concepts to evaluate competitive behaviour
ER -
TY - GEN
AU - Aykanat, Cengiz
ID - 8074
TI - Sharing Economy - Chancen und Risiken aus ökonomischer Sicht
ER -
TY - GEN
AU - Scheibl, Manuel
ID - 5936
TI - Learning about learning curves from dataset properties
ER -
TY - GEN
AU - Wulfes, Robin
ID - 18033
TI - Load-Balanced Routing in Hybriden Kommunikationsnetzwerken
ER -
TY - THES
AU - Juhnke, Jakob
ID - 6597
TI - Models and Constructions for Secure Reputation Systems
ER -
TY - CONF
AU - Jung, Daniel
AU - Kolb, Christina
AU - Scheideler, Christian
AU - Sundermeier, Jannik
ID - 4565
SN - 9781450357999
T2 - Proceedings of the 30th on Symposium on Parallelism in Algorithms and Architectures (SPAA)
TI - Brief Announcement: Competitive Routing in Hybrid Communication Networks
ER -
TY - CONF
AU - Pannu, Gurjashan Singh
AU - Klingler, Florian
AU - Sommer, Christoph
AU - Dressler, Falko
ID - 16380
SN - 9781538609866
T2 - 2017 IEEE Vehicular Networking Conference (VNC)
TI - QQDCA: Adapting IEEE 802.11 EDCA for unicast transmissions at high topology dynamics
ER -
TY - JOUR
AU - Dressler, Falko
AU - Klingler, Florian
AU - Segata, Michele
AU - Cigno, Renato Lo
ID - 16366
JF - Proceedings of the IEEE
SN - 0018-9219
TI - Cooperative Driving and the Tactile Internet
ER -
TY - JOUR
AU - Allgaier, Markus
AU - Ansari, Vahid
AU - Eigner, Christof
AU - Quiring, Viktor
AU - Ricken, Raimund
AU - Donohue, John Matthew
AU - Czerniuk, Thomas
AU - Aßmann, Marc
AU - Bayer, Manfred
AU - Brecht, Benjamin
AU - Silberhorn, Christine
ID - 9680
JF - Applied Physics Letters
SN - 0003-6951
TI - Streak camera imaging of single photons at telecom wavelength
ER -
TY - JOUR
AU - Allgaier, Markus
AU - Ansari, Vahid
AU - Eigner, Christof
AU - Quiring, Viktor
AU - Ricken, Raimund
AU - Donohue, John Matthew
AU - Czerniuk, Thomas
AU - Aßmann, Marc
AU - Bayer, Manfred
AU - Brecht, Benjamin
AU - Silberhorn, Christine
ID - 21029
JF - Applied Physics Letters
SN - 0003-6951
TI - Streak camera imaging of single photons at telecom wavelength
VL - 112
ER -
TY - JOUR
AU - Kapidzic, Sanja
AU - Neuberger, Christoph
AU - Stieglitz, Stefan
AU - Mirbabaie, Milad
ID - 21310
JF - Digital Journalism
SN - 2167-0811
TI - Interaction and Influence on Twitter: Comparing the discourse relationships between user types on five topics
ER -