TY - GEN A1 - Zen, Achmad T1 - Charge Transport in Poly(3-hexylthiophene) and in Highly Soluble Obligothiophene Field-Effect Transistors Y1 - 2006 CY - Potsdam ER - TY - GEN A1 - Wuesthoff, Martin A1 - Sohl, F. T1 - Obliquity tides have an impact in diurnal tidal stresses on the Moon. T2 - Macromolecules : a publication of the American Chemical Society Y1 - 2016 SN - 1086-9379 SN - 1945-5100 VL - 51 SP - A672 EP - A672 PB - Wiley-Blackwell CY - Hoboken ER - TY - GEN A1 - Wolff, Christian Michael A1 - Canil, Laura A1 - Rehermann, Carolin A1 - Nguyen, Ngoc Linh A1 - Zu, Fengshuo A1 - Ralaiarisoa, Maryline A1 - Caprioglio, Pietro A1 - Fiedler, Lukas A1 - Stolterfoht, Martin A1 - Kogikoski, Junior, Sergio A1 - Bald, Ilko A1 - Koch, Norbert A1 - Unger, Eva L. A1 - Dittrich, Thomas A1 - Abate, Antonio A1 - Neher, Dieter T1 - Correction to 'Perfluorinated self-assembled monolayers enhance the stability and efficiency of inverted perovskite solar cells' (2020, 14 (2), 1445−1456) T2 - ACS nano Y1 - 2020 U6 - https://doi.org/10.1021/acsnano.0c08081 SN - 1936-0851 SN - 1936-086X VL - 14 IS - 11 SP - 16156 EP - 16156 PB - American Chemical Society CY - Washington, DC ER - TY - GEN A1 - Wang, Jingwen A1 - Rychkov, Dmitry A1 - Gerhard, Reimund T1 - Influence of Charge Density on Charge Decay in Chemically Modified Polypropylene Films T2 - 2018 IEEE 2nd International Conference on Dielectrics (ICD) N2 - Previous work has shown that surface modification with orthophosphoric acid can significantly enhance the charge stability on polypropylene (PP) surface by generating deeper traps. In the present study, thermally stimulated potential-decay measurements revealed that the chemical treatment may also significantly increase the number of available trapping sites on the surface. Thus, as a consequence, the so-called "cross-over" phenomenon, which is observed on as-received and thermally treated PP electrets, may be overcome in a certain range of initial charge densities. Furthermore, the discharge behavior of chemically modified samples indicates that charges can be injected from the treated surface into the bulk, and/or charges of opposite polarity can be pulled from the rear electrode into the bulk at elevated temperatures and at the high electric fields that are caused by the deposited charges. In the bulk, a lack of deep traps causes rapid charge decay already in the temperature range around 95 degrees C. KW - polypropylene KW - surface charge stability KW - thermally stimulated discharge KW - cross-over effect KW - chemical modification Y1 - 2018 SN - 978-1-5386-6389-9 U6 - https://doi.org/10.1109/ICD.2018.8514718 PB - IEEE CY - New York ER - TY - GEN A1 - Waldrip, Steven H. A1 - Niven, Robert K. A1 - Abel, Markus A1 - Schlegel, Michael T1 - Consistent maximum entropy representations of pipe flow networks T2 - AIP conference proceedings N2 - 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. Y1 - 2017 SN - 978-0-7354-1527-0 U6 - https://doi.org/10.1063/1.4985365 SN - 0094-243X VL - 1853 IS - 1 PB - American Institute of Physics CY - Melville ER - TY - GEN A1 - Waldrip, Steven H. A1 - Niven, Robert K. A1 - Abel, Markus A1 - Schlegel, Michael T1 - Maximum entropy analysis of transport networks T2 - AIP conference proceedings N2 - 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. Y1 - 2017 SN - 978-0-7354-1527-0 U6 - https://doi.org/10.1063/1.4985364 SN - 0094-243X VL - 1853 IS - 1 PB - American Institute of Physics CY - Melville ER - TY - GEN A1 - Thoelert, Steffen A1 - Hörmann, Ulrich A1 - Antreich, Felix A1 - Meurer, Michael T1 - Ionospheric effects on high gain antenna GNSS measurements BT - TEC estimation and correction T2 - Proceedings of the 30th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2017) N2 - The ionospheric delay of global navigation satellite systems (GNSS) signals typically is compensated by adding a single correction value to the pseudorange measurement of a GNSS receiver. Yet, this neglects the dispersive nature of the ionosphere. In this context we analyze the ionospheric signal distortion beyond a constant delay. These effects become increasingly significant with the signal bandwidth and hence more important for new broadband navigation signals. Using measurements of the Galileo E5 signal, captured with a high gain antenna, we verify that the expected influence can indeed be observed and compensated. A new method to estimate the total electron content (TEC) from a single frequency high gain antenna measurement of a broadband GNSS signal is proposed and described in detail. The received signal is de facto unaffected by multi-path and interference because of the narrow aperture angle of the used antenna which should reduce the error source of the result in general. We would like to point out that such measurements are independent of code correlation, like in standard receiver applications. It is therefore also usable without knowledge of the signal coding. Results of the TEC estimation process are shown and discussed comparing to common TEC products like TEC maps and dual frequency receiver estimates. Y1 - 2017 U6 - https://doi.org/10.33012/2017.15343 SN - 2331-5911 SN - 2331-5954 SP - 3368 EP - 3374 PB - Instituite of Navigation CY - Washington ER - TY - GEN A1 - ten Freyhaus, Henrik A1 - Huntgeburth, Michael A1 - Winger, Kirstin A1 - Bäumer, Anselm T. A1 - Vantler, Marius A1 - Bekhite, Mohamed M. A1 - Wartenberg, Maria A1 - Sauer, Heinrich A1 - Sparwel, Jan A1 - Rosenkranz, Stephan T1 - Inhibition of ROS liberation attenuates PDGF-Dependent chemotaxis, but not proliferation in vascular smooth muscle cells - Critical role of Src kinase T2 - Circulation : an American Heart Association journal Y1 - 2006 SN - 0009-7322 VL - 114 SP - 296 EP - 297 PB - Lippincott Williams & Wilkins CY - Philadelphia ER - TY - GEN A1 - Teif, Vladimir B. A1 - Cherstvy, Andrey G. T1 - Chromatin and epigenetics: current biophysical views T2 - AIMS biophysics N2 - Recent advances in high-throughput sequencing experiments and their theoretical descriptions have determined fast dynamics of the "chromatin and epigenetics" field, with new concepts appearing at high rate. This field includes but is not limited to the study of DNA-protein-RNA interactions, chromatin packing properties at different scales, regulation of gene expression and protein trafficking in the cell nucleus, binding site search in the crowded chromatin environment and modulation of physical interactions by covalent chemical modifications of the binding partners. The current special issue does not pretend for the full coverage of the field, but it rather aims to capture its development and provide a snapshot of the most recent concepts and approaches. Eighteen open-access articles comprising this issue provide a delicate balance between current theoretical and experimental biophysical approaches to uncover chromatin structure and understand epigenetic regulation, allowing free flow of new ideas and preliminary results. KW - chromatin KW - epigenetics KW - linker histones KW - nucleosome KW - DNA-protein binding KW - histone modifications KW - remodelers KW - topologically associated domains KW - DNA methylation KW - DNA supercoiling Y1 - 2016 U6 - https://doi.org/10.3934/biophy.2016.1.88 SN - 2377-9098 VL - 3 SP - 88 EP - 98 PB - American Institute of Mathematical Sciences CY - Springfield ER - TY - GEN A1 - Talukder, Srijeeta A1 - Sen, Shrabani A1 - Chakraborti, Prantik A1 - Metzler, Ralf A1 - Banik, Suman K. A1 - Chaudhury, Pinaki T1 - Breathing dynamics based parameter sensitivity analysis of hetero-polymeric DNA T2 - The journal of chemical physics : bridges a gap between journals of physics and journals of chemistr N2 - We study the parameter sensitivity of hetero-polymeric DNA within the purview of DNA breathing dynamics. The degree of correlation between the mean bubble size and the model parameters is estimated for this purpose for three different DNA sequences. The analysis leads us to a better understanding of the sequence dependent nature of the breathing dynamics of hetero-polymeric DNA. Out of the 14 model parameters for DNA stability in the statistical Poland-Scheraga approach, the hydrogen bond interaction epsilon(hb)(AT) for an AT base pair and the ring factor. turn out to be the most sensitive parameters. In addition, the stacking interaction epsilon(st)(TA-TA) for an TA-TA nearest neighbor pair of base-pairs is found to be the most sensitive one among all stacking interactions. Moreover, we also establish that the nature of stacking interaction has a deciding effect on the DNA breathing dynamics, not the number of times a particular stacking interaction appears in a sequence. We show that the sensitivity analysis can be used as an effective measure to guide a stochastic optimization technique to find the kinetic rate constants related to the dynamics as opposed to the case where the rate constants are measured using the conventional unbiased way of optimization. Y1 - 2014 U6 - https://doi.org/10.1063/1.4871297 SN - 0021-9606 SN - 1089-7690 VL - 140 IS - 14 PB - American Institute of Physics CY - Melville ER - TY - GEN A1 - Stich, Michael A1 - Beta, Carsten T1 - Time-Delay Feedback Control of an Oscillatory Medium T2 - Biological Systems: Nonlinear Dynamics Approach N2 - 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. Y1 - 2019 SN - 978-3-030-16585-7 SN - 978-3-030-16584-0 U6 - https://doi.org/10.1007/978-3-030-16585-7_1 SN - 2199-3041 SN - 2199-305X VL - 20 SP - 1 EP - 17 PB - Springer CY - Cham ER - TY - GEN A1 - Stete, Felix A1 - Schossau, Phillip Gerald A1 - Koopman, Wouter-Willem Adriaan A1 - Bargheer, Matias T1 - Size Dependence of the Coupling Strength in Plasmon-Exciton Nanoparticles T2 - Quantum Nano-Photonics N2 - The coupling between molecular excitations and nanoparticles leads to promising applications. It is for example used to enhance the optical cross-section of molecules in surface enhanced Raman scattering, Purcell enhancement or plasmon enhanced dye lasers. In a coupled system new resonances emerge resulting from the original plasmon (ωpl) and exciton (ωex) resonances as ω±=12(ωpl+ωex)±14(ωpl−ωex)2+g2−−−−−−−−−−−−−−−√, (1) where g is the coupling parameter. Hence, the new resonances show a separation of Δ = ω+ − ω− from which the coupling strength can be deduced from the minimum distance between the two resonances, Ω = Δ(ω+ = ω−). Y1 - 2018 SN - 978-94-024-1546-9 SN - 978-94-024-1544-5 SN - 978-94-024-1543-8 U6 - https://doi.org/10.1007/978-94-024-1544-5_26 SN - 1871-465X SP - 381 EP - 383 PB - Springer CY - Dordrecht ER - TY - GEN A1 - Stete, Felix A1 - Koopman, Wouter-Willem Adriaan A1 - Bargheer, Matias T1 - Signatures of strong coupling on nanoparticles BT - revealing absorption anticrossing by tuning the dielectric environment T2 - Quantum Nano-Photonics N2 - The electromagnetic coupling of molecular excitations to plasmonic nanoparticles offers a promising method to manipulate the light-matter interaction at the nanoscale. Plasmonic nanoparticles foster exceptionally high coupling strengths, due to their capacity to strongly concentrate the light-field to sub-wavelength mode volumes. A particularly interesting coupling regime occurs, if the coupling increases to a level such that the coupling strength surpasses all damping rates in the system. In this so-called strong-coupling regime hybrid light-matter states emerge, which can no more be divided into separate light and matter components. These hybrids unite the features of the original components and possess new resonances whose positions are separated by the Rabi splitting energy h Omega. Detuning the resonance of one of the components leads to an anticrossing of the two arising branches of the new resonances omega(+) and omega(-) with a minimal separation of Omega = omega(+) - omega(-). Y1 - 2018 SN - 978-94-024-1546-9 SN - 978-94-024-1544-5 SN - 978-94-024-1543-8 U6 - https://doi.org/10.1007/978-94-024-1544-5_53 SN - 1871-465X SP - 445 EP - 447 PB - Springer CY - Dordrecht ER - TY - GEN A1 - Spahn, Frank A1 - Seiss, Martin T1 - Charges dropped T2 - Nature physics Y1 - 2015 SN - 1745-2473 SN - 1745-2481 VL - 11 IS - 9 SP - 709 EP - 710 PB - Nature Publ. Group CY - London ER - TY - GEN A1 - Shprits, Yuri Y. A1 - Zhelavskaya, Irina A1 - Green, Janet C. A1 - Pulkkinen, Antti A. A1 - Horne, Richard B. A1 - Pitchford, David A1 - Glover, Alexi T1 - Discussions on Stakeholder Requirements for Space Weather-Related Models T2 - Space Weather: The International Journal of Research and Applications N2 - Participants of the 2017 European Space Weather Week in Ostend, Belgium, discussed the stakeholder requirements for space weather-related models. It was emphasized that stakeholders show an increased interest in space weather-related models. Participants of the meeting discussed particular prediction indicators that can provide first-order estimates of the impact of space weather on engineering systems. KW - 7924 KW - 7934 KW - 7959 Y1 - 2018 U6 - https://doi.org/10.1002/2018SW001864 SN - 1542-7390 VL - 16 IS - 4 SP - 341 EP - 342 PB - American Geophysical Union CY - Washington ER - TY - GEN A1 - Shprits, Yuri Y. A1 - Horne, Richard B. A1 - Kellerman, Adam C. A1 - Drozdov, Alexander T1 - The dynamics of Van Allen belts revisited T2 - Nature physics N2 - In an effort to explain the formation of a narrow third radiation belt at ultra-relativistic energies detected during a solar storm in September 20121, Mann et al.2 present simulations from which they conclude it arises from a process of outward radial diffusion alone, without the need for additional loss processes from higher frequency waves. The comparison of observations with the model in Figs 2 and 3 of their Article clearly shows that even with strong radial diffusion rates, the model predicts a third belt near L* = 3 that is twice as wide as observed and approximately an order of magnitude more intense. We therefore disagree with their interpretation that “the agreement between the absolute fluxes from the model and those observed by REPT [the Relativistic Electron Proton Telescope] shown on Figs 2 and 3 is excellent.” Previous studies3 have shown that outward radial diffusion plays a very important role in the dynamics of the outer belt and is capable of explaining rapid reductions in the electron flux. It has also been shown that it can produce remnant belts (Fig. 2 of a long-term simulation study4). However, radial diffusion alone cannot explain the formation of the narrow third belt at multi-MeV during September 2012. An additional loss mechanism is required. Higher radial diffusion rates cannot improve the comparison of model presented by Mann et al. with observations. A further increase in the radial diffusion rates (reported in Fig. 4 of the Supplementary Information of ref. 2) results in the overestimation of the outer belt fluxes by up to three orders of magnitude at energy of 3.4 MeV. Observations at 2 MeV, where belts show only a two-zone structure, were not presented by Mann et al. Moreover, simulations of electrons with energies below 2 MeV with the same diffusion rates and boundary conditions used by the authors would probably produce very strong depletions down to L = 3–3.5, where L is radial distance from the centre of the Earth to the given field line in the equatorial plane. Observations do not show a non-adiabatic loss below L ∼ 4.5 for 2 MeV. Such different dynamics between 2 MeV and above 4 MeV at around L = 3.5 are another indication that particles are scattered by electromagnetic ion cyclotron (EMIC) waves that affect only energies above a certain threshold. Observations of the phase space density (PSD) provide additional evidence for the local loss of electrons. Around L* = 3.5–4 PSD shows significant decrease by an order of magnitude starting in the afternoon of 3 September (Fig. 1a), while PSD above L* = 4 is increasing. The minimum in PSD between L* = 3.5–4 continues to decrease until 4 September. This evolution demonstrates that the loss is not produced by outward diffusion. Radial diffusion cannot produce deepening minima, as it works to smooth gradients. Just as growing peaks in PSD show the presence of localized acceleration5, deepening minima show the presence of localized loss. Figure 1: Time evolution of radiation profiles in electron PSD at relativistic and ultra-relativistic energies. figure 1 a, Similar to Supplementary Fig. 3 of ref. 2, but using TS07D model10 and for μ = 2,500 MeV G−1, K = 0.05 RE G0.5 (where RE is the radius of the Earth). b, Similar to Supplementary Fig. 3 of ref. 2, but using TS07D model and for μ = 700 MeV G−1, corresponding to MeV energies in the heart of the belt. Minimum in PSD in the heart of the multi-MeV electron radiation belt between 3.5 and 4 RE deepening between the afternoon of 3 September and 5 September clearly show that the narrow remnant belt at multi-MeV below 3.5 RE is produced by the local loss. Full size image The minimum in the outer boundary is reached on the evening of 2 September. After that, the outer boundary moves up, while the minimum decreases by approximately an order of magnitude, clearly showing that this main decrease cannot be explained by outward diffusion, and requires additional loss processes. The analysis of profiles of PSD is a standard tool used, for example, in the study about electron acceleration5 and routinely used by the entire Van Allen Probes team. In the Supplementary Information, we show that this analysis is validated by using different magnetic field models. The Supplementary Information also shows that measurements are above background noise. Deepening minima at multi-MeV during the times when the boundary flux increases are clearly seen in Fig. 1a. They show that there must be localized loss, as radial diffusion cannot produce a minimum that becomes lower with time. At lower energies of 1–2 MeV, which corresponds to lower values of the first adiabatic invariant μ (Fig. 1b), the profiles are monotonic between L* = 3–3.5, consistent with the absence of scattering by EMIC waves that affect only electrons above a certain energy threshold6,7,8,9. In summary, the results of the modelling and observations presented by Mann et al. do not lend support to the claim of explaining the dynamics of the ultra-relativistic third Van Allen radiation belt in terms of an outward radial diffusion process alone. While the outward radial diffusion driven by the loss to the magnetopause2 is certainly operating during this storm, there is compelling observational and modelling2,6 evidence that shows that very efficient localized electron loss operates during this storm at multi-MeV energies, consistent with localized loss produced by EMIC waves. Y1 - 2018 U6 - https://doi.org/10.1038/nphys4350 SN - 1745-2473 SN - 1745-2481 VL - 14 IS - 2 SP - 102 EP - 103 PB - Nature Publ. Group CY - London ER - TY - GEN A1 - Shprits, Yuri Y. T1 - Editorial: Topical Collection on the Lomonosov Mission T2 - Space science reviews Y1 - 2017 U6 - https://doi.org/10.1007/s11214-017-0393-1 SN - 0038-6308 SN - 1572-9672 VL - 212 SP - 1685 EP - 1686 PB - Springer CY - Dordrecht ER - TY - GEN A1 - Schrape, Oliver A1 - Balashov, Alexey A1 - Simevski, Aleksandar A1 - Benito, Carlos A1 - Krstić, Miloš T1 - Master-Clone placement with individual clock tree implementation BT - a Case on Physical Chip Design T2 - 2018 IEEE Nordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC) N2 - A hybrid design approach of the hierarchical physical implementation design flow is presented and demonstrated on a fault-tolerant low-power multiprocessor system. The proposed flow allows to implement selected submodules in parallel with contrary requirements such as identical placement and individual block implementation. The overall system contains four Leon2 cores and communicates via the Waterbear framework and supports Adaptive Voltage Scaling (AVS) functionality. Three of the processor core variants are derived from the first baseline reference core but implemented individually at block level based on their clock tree specification. The chip is prepared for space applications and designed with triple modular redundancy (TMR) for control parts. The low-power performance is enabled by contemporary power and clock management control. An ASIC is fabricated in a low-power 0.13 mu m BiCMOS technology process node. KW - Hierarchical Design KW - Physical Implementation KW - Clock Tree Implementation Y1 - 2018 SN - 978-1-5386-7656-1 PB - IEEE CY - New York ER - TY - GEN A1 - Saliba, Michael A1 - Stolterfoht, Martin A1 - Wolff, Christian Michael A1 - Neher, Dieter A1 - Abate, Antonio T1 - Measuring aging stability of perovskite solar cells T2 - Joule Y1 - 2018 U6 - https://doi.org/10.1016/j.joule.2018.05.005 SN - 2542-4351 VL - 2 IS - 6 SP - 1019 EP - 1024 PB - Cell Press CY - Cambridge ER - TY - GEN A1 - Rychkov, Andrey A1 - Stojharov, Valery A1 - Kuznetsov, Alexey A1 - Rychkov, Dmitry T1 - The influence of recrystallization regimes on electret charge stability in low-density polyethylene films T2 - 2018 IEEE 2nd International Conference on Dielectrics (ICD) N2 - 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. KW - electrets KW - low-density polyethylene KW - crystallinity KW - quenching KW - recrystallization Y1 - 2018 SN - 978-1-5386-6389-9 SN - 978-1-5386-6388-2 SN - 978-1-5386-6390-5 U6 - https://doi.org/10.1109/ICD.2018.8514638 PB - IEEE CY - New York ER -