@misc{Metzler2017, author = {Metzler, Ralf}, title = {Anomalous Diffusion in Membranes and the Cytoplasm of Biological Cells}, series = {Biophysical journal}, volume = {112}, journal = {Biophysical journal}, number = {3}, publisher = {Cell Press}, address = {Cambridge}, issn = {0006-3495}, doi = {10.1016/j.bpj.2016.11.2577}, pages = {476A -- 476A}, year = {2017}, language = {en} } @misc{LewandowskyCowtanRisbeyetal.2019, author = {Lewandowsky, Stephan and Cowtan, Kevin and Risbey, James S. and Mann, Michael E. and Steinman, Byron A. and Oreskes, Naomi and Rahmstorf, Stefan}, title = {Erratum: The 'pause' in global warming in historical context: II. Comparing models to observations (Environmental research letters. - Vol 13, (2018) 123007)}, series = {Environmental research letters}, volume = {14}, journal = {Environmental research letters}, number = {4}, publisher = {IOP Publ. Ltd.}, address = {Bristol}, issn = {1748-9326}, doi = {10.1088/1748-9326/aafbb7}, pages = {2}, year = {2019}, abstract = {We review the evidence for a putative early 21st-century divergence between global mean surface temperature (GMST) and Coupled Model Intercomparison Project Phase 5 (CMIP5) projections. We provide a systematic comparison between temperatures and projections using historical versions of GMST products and historical versions of model projections that existed at the times when claims about a divergence were made. The comparisons are conducted with a variety of statistical techniques that correct for problems in previous work, including using continuous trends and a Monte Carlo approach to simulate internal variability. The results show that there is no robust statistical evidence for a divergence between models and observations. The impression of a divergence early in the 21st century was caused by various biases in model interpretation and in the observations, and was unsupported by robust statistics.}, language = {en} } @misc{MawassAroraSandigetal.2018, author = {Mawass, Mohamad-Assaad and Arora, Ashima and Sandig, Oliver and Luo, Chen and Unal, Ahmet A. and Radu, Florin and Valencia, Sergio and Kronast, Florian}, title = {Spatially resolved investigation of all optical magnetization switching in TbFe alloys}, series = {2018 IEEE International Magnetics Conference (INTERMAG)}, journal = {2018 IEEE International Magnetics Conference (INTERMAG)}, publisher = {IEEE}, address = {New York}, isbn = {978-1-5386-6425-4}, doi = {10.1109/INTMAG.2018.8508211}, pages = {1}, year = {2018}, abstract = {High storage density magnetic devices rely on the precise, reliable and ultrafast switching times of the magnetic states. Optical control of magnetization using femtosecond laser without applying any external magnetic field offers the advantage of switching magnetic states at ultrashort time scales, which has attracted a significant attention. Recently, it has been reported and demonstrated the,so-called, all-optical helicity-dependent switching (AO-HDS) in which a circularly polarized femtosecond laser pulse switches the magnetization of a ferromagnetic thin film as function of laser helicity [1]. Afterward, in more recent studies, it has been reported that AO-HDS is a general phenomenon existing in magnetic materials ranging from rare earth - transition metals ferrimagnetic (e.g. alloys, multilayers and hetero-structures system) to even ferromagnetic thin films. Among numerous studies in the literature which are discussing the microscopic origin of AO-HDS in ferromagnets or ferrimagnetic alloys, the most renowned concepts are momentum transfer via Inverse Faraday Effect (IFE) [1-3]and the concept of preferential thermal demagnetization for one magnetization direction by heating close to Tc (Curie temperature) in the presence of magnetic circular dichroism (MCD) [4-6]. In this study, we investigate all-optical magnetic switching using a stationary femtosecond laser spot (3-5 μm) in TbFe alloys via photoemission electron microscopy (PEEM) and x-ray magnetic circular dichroism (XMCD) with a spatial resolution of approximately 30 nm. We spatially characterize the effect of laser heating and local temperature profile created across the laser spot on AO-HDS in TbFe thin films. We find that AO-HDS occurs only in a `ring' shaped region surrounding the thermally demagnetized region formed by the laser spot and the formation of switched domains relies further on thermally induced domain wall motion. Our temperature dependent measurements highlight the importance of attainin...}, language = {en} } @misc{RychkovStojharovKuznetsovetal.2018, author = {Rychkov, Andrey and Stojharov, Valery and Kuznetsov, Alexey and Rychkov, Dmitry}, title = {The influence of recrystallization regimes on electret charge stability in low-density polyethylene films}, series = {2018 IEEE 2nd International Conference on Dielectrics (ICD)}, journal = {2018 IEEE 2nd International Conference on Dielectrics (ICD)}, publisher = {IEEE}, address = {New York}, isbn = {978-1-5386-6389-9}, doi = {10.1109/ICD.2018.8514638}, pages = {4}, year = {2018}, abstract = {The electret state stability in nonpolar semicrystalline polymers is largely determined by the traps located at crystalline/ amorphous phase interfaces. Thus, the thermal history of such polymers should considerably influence their electret properties. In the present work, we investigate how recrystallization influences charge stability in low-density polyethylene corona electrets. It has been found that electret charge stability in quenched samples is higher than in slowly-crystallized ones. Phenomenologicaly, this can be explained by the increased number of deeper traps in samples with smaller crystallite size.}, language = {en} } @misc{Rastogi2019, author = {Rastogi, Abhishake}, title = {Tikhonov regularization with oversmoothing penalty for linear statistical inverse learning problems}, series = {AIP Conference Proceedings : third international Conference of mathematical sciences (ICMS 2019)}, volume = {2183}, journal = {AIP Conference Proceedings : third international Conference of mathematical sciences (ICMS 2019)}, publisher = {American Institute of Physics}, address = {Melville}, isbn = {978-0-7354-1930-8}, issn = {0094-243X}, doi = {10.1063/1.5136221}, pages = {4}, year = {2019}, abstract = {In this paper, we consider the linear ill-posed inverse problem with noisy data in the statistical learning setting. The Tikhonov regularization scheme in Hilbert scales is considered in the reproducing kernel Hilbert space framework to reconstruct the estimator from the random noisy data. We discuss the rates of convergence for the regularized solution under the prior assumptions and link condition. For regression functions with smoothness given in terms of source conditions the error bound can explicitly be established.}, language = {en} } @misc{StichBeta2019, author = {Stich, Michael and Beta, Carsten}, title = {Time-Delay Feedback Control of an Oscillatory Medium}, series = {Biological Systems: Nonlinear Dynamics Approach}, volume = {20}, journal = {Biological Systems: Nonlinear Dynamics Approach}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-16585-7}, issn = {2199-3041}, doi = {10.1007/978-3-030-16585-7_1}, pages = {1 -- 17}, year = {2019}, abstract = {The supercritical Hopf bifurcation is one of the simplest ways in which a stationary state of a nonlinear system can undergo a transition to stable self-sustained oscillations. At the bifurcation point, a small-amplitude limit cycle is born, which already at onset displays a finite frequency. If we consider a reaction-diffusion system that undergoes a supercritical Hopf bifurcation, its dynamics is described by the complex Ginzburg-Landau equation (CGLE). Here, we study such a system in the parameter regime where the CGLE shows spatio-temporal chaos. We review a type of time-delay feedback methods which is suitable to suppress chaos and replace it by other spatio-temporal solutions such as uniform oscillations, plane waves, standing waves, and the stationary state.}, language = {en} } @misc{WaldripNivenAbeletal.2017, author = {Waldrip, Steven H. and Niven, Robert K. and Abel, Markus and Schlegel, Michael}, title = {Consistent maximum entropy representations of pipe flow networks}, series = {AIP conference proceedings}, volume = {1853}, journal = {AIP conference proceedings}, number = {1}, publisher = {American Institute of Physics}, address = {Melville}, isbn = {978-0-7354-1527-0}, issn = {0094-243X}, doi = {10.1063/1.4985365}, year = {2017}, abstract = {The maximum entropy method is used to predict flows on water distribution networks. This analysis extends the water distribution network formulation of Waldrip et al. (2016) Journal of Hydraulic Engineering (ASCE), by the use of a continuous relative entropy defined on a reduced parameter set. This reduction in the parameters that the entropy is defined over ensures consistency between different representations of the same network. The performance of the proposed reduced parameter method is demonstrated with a one-loop network case study.}, language = {en} } @misc{WaldripNivenAbeletal.2017, author = {Waldrip, Steven H. and Niven, Robert K. and Abel, Markus and Schlegel, Michael}, title = {Maximum entropy analysis of transport networks}, series = {AIP conference proceedings}, volume = {1853}, journal = {AIP conference proceedings}, number = {1}, publisher = {American Institute of Physics}, address = {Melville}, isbn = {978-0-7354-1527-0}, issn = {0094-243X}, doi = {10.1063/1.4985364}, pages = {8}, year = {2017}, abstract = {The maximum entropy method is used to derive an alternative gravity model for a transport network. The proposed method builds on previous methods which assign the discrete value of a maximum entropy distribution to equal the traffic flow rate. The proposed method however, uses a distribution to represent each flow rate. The proposed method is shown to be able to handle uncertainty in a more elegant way and give similar results to traditional methods. It is able to incorporate more of the observed data through the entropy function, prior distribution and integration limits potentially allowing better inferences to be made.}, language = {en} } @misc{MuellerKupschLaquaietal.2018, author = {M{\"u}ller, Bernd Randolf and Kupsch, Andreas and Laquai, Rene and Nellesen, Jens and Tillmann, Wolfgang and Kasperovich, Galina and Bruno, Giovanni}, title = {Microstructure Characterisation of Advanced Materials via 2D and 3D X-Ray Refraction Techniques}, series = {Materials Science Forum}, volume = {941}, journal = {Materials Science Forum}, publisher = {Trans Tech Publications Ltd}, address = {Zurich}, isbn = {978-3-0357-1208-7}, issn = {0255-5476}, doi = {10.4028/www.scientific.net/MSF.941.2401}, pages = {2401 -- 2406}, year = {2018}, abstract = {3D imaging techniques have an enormous potential to understand the microstructure, its evolution, and its link to mechanical, thermal, and transport properties. In this conference paper we report the use of a powerful, yet not so wide-spread, set of X-ray techniques based on refraction effects. X-ray refraction allows determining internal specific surface (surface per unit volume) in a non-destructive fashion, position and orientation sensitive, and with a nanometric detectability. We demonstrate showcases of ceramics and composite materials, where microstructural parameters could be achieved in a way unrivalled even by high-resolution techniques such as electron microscopy or computed tomography. We present in situ analysis of the damage evolution in an Al/Al2O3 metal matrix composite during tensile load and the identification of void formation (different kinds of defects, particularly unsintered powder hidden in pores, and small inhomogeneity's like cracks) in Ti64 parts produced by selective laser melting using synchrotron X-ray refraction radiography and tomography.}, language = {en} } @misc{MotterMatiasKurthsetal.2006, author = {Motter, Adilson E. and Matias, Manuel A. and Kurths, J{\"u}rgen and Ott, Edward}, title = {Dynamics on complex networks and applications}, series = {Physica. D, Nonlinear phenomena}, volume = {224}, journal = {Physica. D, Nonlinear phenomena}, number = {1-2}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0167-2789}, doi = {10.1016/j.physd.2006.09.012}, pages = {VII -- VIII}, year = {2006}, language = {en} }