cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Averaging of Nonlinearity Management with Dissipation
Creators: name: Beheshti, S.
name: Law, K. J. H.
name: Kevrekidis, P. G.
name: Porter, Mason A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Motivated by recent experiments in optics and atomic physics, we derive an averaged nonlinear partial differential equation describing the dynamics of the complex field in a nonlinear Schroedinger model in the presence of a periodic nonlinearity and a periodically-varying dissipation coefficient. The incorporation of dissipation is motivated by experimental considerations. We test the numerical behavior of the derived averaged equation by comparing it to the original nonautonomous model in a prototypical case scenario and observe good agreement between the two.
Το κατ’ εξακολούθηση έγκλημα κατ’ άρθρο 98 παρ. 1 Π.Κ.
Creators: name: Δρούτσα, Μαρία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Το κατ’ εξακολούθηση έγκλημα
Προϋποθέσεις
Συνέπειες
The continual crime
Conditions
Results

description: Σκοπός της διπλωματικής εργασίας ήταν η ανάλυση του κατ’ εξακολούθηση εγκλήματος όπως τυποποιείται στο άρθρο 98 παρ. 1 Π.Κ. . Μελετήσαμε την έννοια και τη νομική φύση αυτού, τους λόγους που δικαιολογούν την ύπαρξή του, το συγκρίναμε με την κατ’ επάγγελμα και κατά συνήθεια τέλεση εγκλήματος, προσδιορίσαμε τις προϋποθέσεις κατάφασης του κατ’ εξακολούθηση εγκλήματος αλλά και τις πρακτικές συνέπειες της ύπαρξής του καθώς επίσης και την ποινική κύρωση που προβλέπεται στο άρθρο 98 παρ. 1 Π.Κ. . Στη συνέχεια, ασχοληθήκαμε με ζητήματα απόπειρας και συμμετοχής ενώ αναφερθήκαμε και σε ορισμένα δικονομικά ζητήματα που αναφύονται στο πλαίσιο λειτουργίας του κατ’ εξακολούθηση εγκλήματος. Τέλος, παρουσιάσαμε και τις θέσεις της νομολογίας γύρω από το εν λόγω ζήτημα ενώ αναλύσαμε και ορισμένα ζητήματα διαχρονικού δικαίου.
description: The purpose of the diplomatic work was to analyze the continuing crime which is included in the article 98 par. 1 of the Greek Penal Code. We have studied the concept and the legal nature of this, the reasons justifying its existence, we compared it with the professional and customary crime, we set out the conditions for declaring the continuing crime but also the practical consequences of its existence as well as the penalty provided for in the article 98 par. 1 of the Greek Penal Code. Then we dealt with issues of attempt and participation while we also referred to certain procedural issues arising in the context of the continuation of crime. Finally, we also presented the case-law on this issue while we have analyzed some issues of timeless law.
Topological charge and spin pumping in a semiconductor nanowire
Creators: name: Liu, Zhi-Hai
name: Xu, H. Q.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The adiabatic topological pumping is proposed by periodically modulating a semiconductor nanowire double-quantum-dot chain. We demonstrate that the quantized charge transport can be achieved by a nontrivial modulation of the quantum-dot well and barrier potentials. When the quantum-dot well potential is replaced by a time-dependent staggered magnetic field, the topological spin pumping can be realized by periodically modulating the barrier potentials and magnetic field. We also demonstrate that in the presence of Rashba spin-orbit interaction, the double-quantum-dot chain can be used to implement the topological spin pumping. However, the pumped spin in this case can have a quantization axis other than the applied magnetic field direction. Moreover, we show that all the adiabatic topological pumping are manifested by the presence of gapless edge states traversing the band gap as a function of time.
title: Minimalizacja znaczników rezonansowych dla magnetoakustycznego systemu antykradzieżowego
Creators: name: Świderski, Mariusz
name: Gulczyński, Adam
name: Biernacki, Jerzy
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 53-62
title: Model symulacyjny jednofazowego prostownika diodowego z modulatorem prądu
Creators: name: Ciepliński, Łukasz
name: Krystkowiak, Michał
name: Gwóźdź, Michał
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 63-72
Revealing topological phase in Pancharatnam-Berry metasurfaces using mesoscopic electrodynamics
Creators: name: Gao, Zhanjie
name: Golla, Sandeep
name: Sawant, Rajath
name: Osipov, Vladimir
name: Briere, Gauthier
name: Vezian, Stephane
name: Damilano, Benjamin
name: Genevet, Patrice
name: Dorfman, Konstantin E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Relying on the local orientation of nanostructures, Pancharatnam-Berry metasurfaces are currently enabling a new generation of polarization-sensitive optical devices. A systematical mesoscopic description of topological metasurfaces is developed, providing a deeper understanding of the physical mechanisms leading to the polarization-dependent breaking of translational symmetry in contrast with propagation phase effects. These theoretical results, along with interferometric experiments, contribute to the development of a solid theoretical framework for arbitrary polarization-dependent metasurfaces.
Deformation of Electronic Structures Due to CoO6 Distortion and Phase Diagrams of NaxCoO2.yH2O
Creators: name: Mochizuki, Masahito
name: Ogata, Masao
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Motivated by recently reported experimental phase diagrams, we study the effects of CoO6 distortion on the electronic structure in NaxCoO2.yH2O. We construct the multiband tight-binding model by employing the LDA result. Analyzing this model, we show the deformation of band dispersions and Fermi-surface topology as functions of CoO2-layer thickness. Considering these results together with previous theoretical ones, we propose a possible schematic phase diagram with three successive phases: the extended s-wave superconductivity (SC), the magnetic order, and the spin-triplet SC phases when the Co valence number s is +3.4. A phase diagram with only one phase of spin-triplet SC is also proposed for the s=+3.5 case.
description: 4 pages, 5 figures
title: Modelowanie trójwymiarowego rozkładu pola temperatury w elektromagnetycznym układzie chwytnym z wykorzystaniem środowiska Comsol
Creators: name: Barański, Mariusz
name: Glapa, Krystian
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 73-83
title: Analiza porównawcza silników indukcyjnego klatkowego i synchronicznego reluktancyjnego o rozruchu własnym
Creators: name: Grycmacher, Mateusz
name: Łyskawiński, Wiesław
name: Szaląg, Wojciech
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 85-96
Hoinga: A supernova remnant discovered in the SRG/eROSITA All-Sky Survey eRASS1
Creators: name: Becker, W.
name: Hurley-Walker, N.
name: Weinberger, Ch.
name: Nicastro, L.
name: Mayer, M. G. F.
name: Merloni, A.
name: Sanders, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Supernova remnants (SNRs) are observable for about 6-15x10^4 years before they fade into the Galactic interstellar medium. With a Galactic supernova rate of approximately two per century, we can expect to have of the order of 1200 SNRs in our Galaxy. However, only about 300 of them are known to date, with the majority having been discovered in Galactic plane radio surveys. Given that these SNRs represent the brightest tail of the distribution and are mostly located close to the plane, they are not representative of the complete sample. Here we report findings from the search for new SNRs in the eROSITA all-sky survey data which led to the detection of one of the largest SNRs discovered at wavelengths other than the radio: G249.5+24.5. This source is located at a relatively high Galactic latitude, where SNRs are not usually expected to be found. The remnant, 'Hoinga', has a diameter of about 4.4 degrees and shows a circular shaped morphology with diffuse X-ray emission filling almost the entire remnant. Spectral analysis of the remnant emission reveals that an APEC spectrum from collisionally ionised diffuse gas and a plane-parallel shock plasma model with non-equilibrium ionisation are both able to provide an adequate description of the data, suggesting a gas temperature of the order of kT = 0.1 keV and an absorbing column density of N_H=3.6 x 10^20 cm^-2. Subsequent searches for a radio counterpart of the Hoinga remnant identified its radio emission in archival data from the Continuum HI Parkes All-Sky Survey (CHIPASS) and the 408-MHz `Haslam' all-sky survey. The radio spectral index alpha=-0.69 +- 0.08 obtained from these data definitely confirms the SNR nature of Hoinga. From its size and X-ray and radio spectral properties we conclude that Hoinga is a middle-aged Vela-like SNR located at a distance of about twice that of the Vela SNR, i.e. at ~500 pc.
description: Accepted for publication in Astronomy & Astrophysics on Feb 12. 2021, submitted to Astronomy & Astrophysics on December 17. 2020. 12 pages, 10 figures
The shape and composition of interstellar silicate grains
Creators: name: Min, M.
name: Waters, L. B. F. M.
name: de Koter, A.
name: Hovenier, J. W.
name: Keller, L. P.
name: Markwick-Kemper, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the composition and shape distribution of silicate dust grains in the interstellar medium. The effect of the amount of magnesium in the silicate lattice is studied. We fit the spectral shape of the interstellar 10 mu extinction feature as observed towards the galactic center. We use very irregularly shaped coated and non-coated porous Gaussian Random Field particles as well as a statistical approach to model shape effects. For the dust materials we use amorphous and crystalline silicates with various composition and SiC. The results of our analysis of the 10 mu feature are used to compute the shape of the 20 mu silicate feature and to compare this with observations. By using realistic particle shapes we are, for the first time, able to derive the magnesium fraction in interstellar silicates. We find that the interstellar silicates are highly magnesium rich (Mg/(Fe+Mg)>0.9) and that the stoichiometry lies between pyroxene and olivine type silicates. This composition is not consistent with that of the glassy material found in GEMS in interplanetary dust particles indicating that these are, in general, not unprocessed remnants from the interstellar medium. Also, we find a significant fraction of SiC (~3%). We discuss the implications of our results for the formation and evolutionary history of cometary and circumstellar dust. We argue that the fact that crystalline silicates in cometary and circumstellar grains are almost purely magnesium silicates is a natural consequence of our findings that the amorphous silicates from which they were formed were already magnesium rich.
description: Accepted for publication in A&A
Machine Learning improved fits of the sound horizon at the baryon drag epoch
Creators: name: Aizpuru, Andoni
name: Arjona, Rubén
name: Nesseris, Savvas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The baryon acoustic oscillations (BAO) have proven to be an invaluable tool in constraining the expansion history of the Universe at late times and are characterized by the comoving sound horizon at the baryon drag epoch $r_\mathrm{s}(z_\mathrm{d})$. The latter quantity can be calculated either numerically using recombination codes or via fitting functions, such as the one by Eisenstein and Hu (EH), made via grids of parameters of the recombination history. Here we quantify the accuracy of these expressions and show that they can strongly bias the derived constraints on the cosmological parameters using BAO data. Then, using a machine learning approach, called the genetic algorithms, we proceed to derive new analytic expressions for $r_\mathrm{s}(z_\mathrm{d})$ which are accurate at the $\sim0.003\%$ level in a range of $10σ$ around the Planck 2018 best-fit or $\sim0.018\%$ in a much broader range, compared to $\sim 2-4\%$ for the EH expression, thus obtaining an improvement of two to three orders of magnitude. Moreover, we also provide fits that include the effects of massive neutrinos and an extension to the concordance cosmological model assuming variations of the fine structure constant. Finally, we note that our expressions can be used to ease the computational cost required to compute $r_\mathrm{s}(z_\mathrm{d})$ with a Boltzmann code when deriving cosmological constraints using BAO data from current and upcoming surveys.
description: 8 pages, 2 figures, 2 tables. Changes match published version
Static and Dynamical Phyllotaxis in a Magnetic Cactus
Creators: name: Nisoli, Cristiano
name: Gabor, Nathaniel
name: Lammert, Paul E.
name: Crespi, Vincent H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: While the statics of many simple physical systems reproduce the striking number-theoretical patterns found in the phyllotaxis of living beings, their dynamics reveal unusual excitations: multiple classical rotons and a large family of interconverting topological solitons. As we introduce those, we also demonstrate experimentally for the first time Levitov's celebrated model for phyllotaxis. Applications at different scales and in different areas of physics are proposed and discussed.
description: Phys. Rev. Lett. accepted for publication
title: Design and implementation of a universal inverter for supplying AC and DC electric motors
Creators: name: Ludowicz, Wojciech
name: Danielczyk, Dawid
name: Wojciechowski, Rafał M.
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 97-107
Holographic Coulomb branch vevs
Creators: name: Skenderis, Kostas
name: Taylor, Marika
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute holographically the vevs of all chiral primary operators for supergravity solutions corresponding to the Coulomb branch of N=4 SYM and find exact agreement with the corresponding field theory computation. Using the dictionary between 10d geometries and field theory developed to extract these vevs, we propose a gravity dual of a half supersymmetric deformation of N=4 SYM by certain irrelevant operators.
description: 16 pages, v2 corrections in appendix
title: Symulacja napędu o zmiennej konfiguracji uzwojeń z trójpasmowym przełączalnym silnikiem reluktancyjnym
Creators: name: Adamski, Bartłomiej
name: Wróbel, Krzysztof
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 109-118
Magneto-optical properties of multilayer graphenes
Creators: name: Koshino, Mikito
name: Ando, Tsuneya
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The magneto-optical absorption properties of graphene multilayers are theoretically studied. It is shown that the spectrum can be decomposed into sub-components effectively identical to the monolayer or bilayer graphene, allowing us to understand the spectrum systematically as a function of the layer number. Odd-layered graphenes always exhibit absorption peaks which shifts in proportion to sqrt(B), with B being the magnetic field, due to the existence of an effective monolayer-like subband. We propose a possibility of observing the monolayer-like spectrum even in a mixture of multilayer graphene films with various layers numbers.
description: 9 pages, 7 figures
title: Awaryjne zasilanie z trójfazowych prądnic synchronicznych zespołów spalinowo-elektrycznych
Creators: name: Stein, Zbigniew
name: Zielińska, Maria
name: Nawrowski, Ryszard
name: Pietracho, Robert
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 119-134
title: Wpływ sposobu detekcji sygnałów enkodera inkrementalnego na opóźnienia wyznaczania zakresów zasilania pasm silnika SRM
Creators: name: Rataj, Daniel
name: Tomczewski, Krzysztof
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 135-144
Physical and chemical properties of Wolf-Rayet planetary nebulae
Creators: name: Danehkar, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Wolf-Rayet ([WR]) and weak emission-line ($wels$) central stars of planetary nebulae (PNe) have hydrogen-deficient atmospheres, whose origins are not well understood. In the present study, we have conducted plasma diagnostics and abundance analyses of 18 Galactic PNe surrounding [WR] and $wels$ nuclei, using collisionally excited lines (CELs) and optical recombination lines (ORLs) measured with the Wide Field Spectrograph on the ANU 2.3-m telescope at the Siding Spring Observatory complemented with optical archival data. Our plasma diagnostics imply that the electron densities and temperatures derived from CELs are correlated with the intrinsic nebular H$β$ surface brightness and excitation class, respectively. Self-consistent plasma diagnostics of heavy element ORLs of N${}^{2+}$ and O${}^{2+}$ suggest that a small fraction of cool ($\lesssim 7000$ K), dense ($\sim 10^4-10^5$ cm$^{-3}$) materials may be present in some objects, though with large uncertainties. Our abundance analyses indicate that the abundance discrepancy factors (ADF$\equiv$ORLs/CELs) of O${}^{2+}$ are correlated with the dichotomies between forbidden-line and He I temperatures. Our results likely point to the presence of a tiny fraction of cool, oxygen-rich dense clumps within the diffuse warm ionized nebulae. Moreover, our elemental abundances derived from CELs are mostly consistent with AGB models in the range of initial masses from 1.5 to 5M$_{\odot}$. Further studies are necessary to understand better the origins of abundance discrepancies in PNe around [WR] and $wels$ stars.
description: 97 pages (23+74 in Supplementary), 8 figures (inc. 2 fig.sets), 14 tables (inc. 7 MRT), accepted by ApJS, supplementary data (machine readable tables) archived on https://doi.org/10.5281/zenodo.5002183
title: Implementacja modułu sterowania napędem złącza manipulatora w adaptacyjnym systemie wymiany informacji
Creators: name: Strzelczyk, Przemysław
name: Tomczewski, Krzysztof
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 145-156
Lepton flavour violation in rare $Λ_b$ decays
Creators: name: Bordone, Marzia
name: Rahimi, Muslem
name: Vos, K. Keri
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Lepton flavour violation (LFV) naturally occurs in many new physics models, specifically in those explaining the $B$ anomalies. While LFV has already been studied for mesonic decays, it is important to consider also baryonic decays mediated by the same quark transition. In this paper, we study LFV in the baryonic $Λ_b \to Λ\ell_1 \ell_2$ using for the first time a full basis of New Physics operators. We present expected bounds on the branching ratio in a model-independent framework and using two specific new physics models. Finally, we point out the interplay and orthogonality between the baryonic and mesonic LFV searches.
description: 26 pages, 4 figures; v3 is conformal with published version
Επιφάνειες με αντιμικροβιακές ιδιότητες
Creators: name: Κοθρούλας, Ιωάννης Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: αντιμικροβιακές επιφάνειες
νανοσωματίδια
πολυμερή
antimicrobial surfaces
nanoparticles
polymers

description: Η χρήση αντιμικροβιακών επιφανειών έχει αρχίσει να αυξάνεται όλo και περισσότερο μιας και έχουν αποδειχθεί αρκετά αποτελεσματικά στην καταπολέμηση των βακτηριακών κυρίως λοιμώξεων. Τα αντιμικροβιακά υλικά και η κατασκευή επιφανειών έχουν προσελκύσει το ενδιαφέρον αρκετών επιστημόνων και έχουν σημειωθεί αξιόλογες προσπάθειες. Ως προς την αποτελεσματικότητά τους και τον μηχανισμό δράση τους έχουν μελετηθεί τόσο μέταλλα, όπως ο άργυρος και το τιτάνιο με τα οξείδιά τους αλλά και οργανικά υλικά με βασική κατηγορία τα πολυμερή. Ωστόσο, έχουν πραγματοποιηθεί και αξιόλογες προσπάθειες συνδυασμού ανόργανων και οργανικών υλικών, που δρουν συνεργειακά ώστε να θανατώσουν τα μικρόβια, να απομακρύνουν τα νεκρά υπολείμματα τους και να απωθήσουν τα υπόλοιπα ζωντανά μικρόβια. Επίσης, έχουν μελετηθεί και ποικίλες μέθοδοι τροποποίησης των επιφανειών ώστε να αυξηθεί η αντιμικροβιακή ενεργότητά τους. Σε αυτές συγκαταλέγονται οι φυσικές και οι χημικές μέθοδοι τροποποίησης. Στην πρώτη κατηγορία ανήκουν η εναπόθεση ατμού και η κατασκευή φιλμ στρωμάτων ενώ στη δεύτερη η παραγωγοποίηση και η επικάλυψη των επιφανειών. Ιδιαίτερα η επικάλυψη των επιφανειών είναι ιδιαίτερα μελετημένη λόγω των πολλαπλών δυνατοτήτων που προσφέρει. Σκοπός της παρούσας εργασίας είναι να παρουσιάσει τα διαφορετικά υλικά που χρησιμοποιούνται για την κατασκευή των αντιμικροβιακών επιφανειών, τον τρόπο δράσης τους καθώς και τις τεχνικές κατασκευής και τροποποίησής τους
description: The use of antimicrobial surfaces has been rising since they have proven to be quite effective in combating microbial and mainly bacterial infections. The antimicrobial materials and surface structure have attracted the interest of several scientists and there have been considerable efforts in designing. As to their effectiveness and their action mechanism have been studied both metals, such as silver and titanium with oxides and organic materials such as polymers. However, considerable efforts in combination of inorganic and organic materials, which act synergistically to kill germs, to remove the dead debris and to repel the remaining living germs, have also been done. Furthermore, researchers have been studied various methods of surface modification to enhance the antimicrobial activity of surfaces and nanoparticles. These include the physical and chemical modification methods. The first category includes vapor deposition and construction of film layer by layer, while the second includes derivatization and coating of surfaces. Particularly surface coating is particularly studied due to the multiple offered possibilities. The purpose of this work is to present the different materials used in the manufacture of antimicrobial surfaces, their mechanism of action and finally their construction and modification techniques
MPEC 2025-G66 : 2024 XA48
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 XA48

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Machine Learning Implicit Solvation for Molecular Dynamics
Creators: name: Chen, Yaoyi
name: Krämer, Andreas
name: Charron, Nicholas E.
name: Husic, Brooke E.
name: Clementi, Cecilia
name: Noé, Frank
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Biomolecules (q-bio.BM)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: Accurate modeling of the solvent environment for biological molecules is crucial for computational biology and drug design. A popular approach to achieve long simulation time scales for large system sizes is to incorporate the effect of the solvent in a mean-field fashion with implicit solvent models. However, a challenge with existing implicit solvent models is that they often lack accuracy or certain physical properties compared to explicit solvent models, as the many-body effects of the neglected solvent molecules is difficult to model as a mean field. Here, we leverage machine learning (ML) and multi-scale coarse graining (CG) in order to learn implicit solvent models that can approximate the energetic and thermodynamic properties of a given explicit solvent model with arbitrary accuracy, given enough training data. Following the previous ML--CG models CGnet and CGSchnet, we introduce ISSNet, a graph neural network, to model the implicit solvent potential of mean force. ISSNet can learn from explicit solvent simulation data and be readily applied to MD simulations. We compare the solute conformational distributions under different solvation treatments for two peptide systems. The results indicate that ISSNet models can outperform widely-used generalized Born and surface area models in reproducing the thermodynamics of small protein systems with respect to explicit solvent. The success of this novel method demonstrates the potential benefit of applying machine learning methods in accurate modeling of solvent effects for in silico research and biomedical applications.
description: 16 pages, 6 figures
title: Porównanie wydajności wysokopoziomowych języków programowania w systemach mikroprocesorowych
Creators: name: Choroszucho, Agnieszka
name: Golonko, Piotr
name: Sumorek, Mateusz
name: Żukowski, Jakub
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 157-165
Εκδοχές Γονεϊκότητας στη Σύγχρονη Ελλάδα
Creators: name: Αντωνιάδου, Χρυσούλα Κυριάκου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: subject: Ανθρωπολογία
subject: Γονεϊκότητα
subject: Παιδικό Χωριό ΣΟΣ
subject: Anthropology
subject: FOS: Sociology
subject: Relatedness
subject: SOS Children s Village

description: Η παρούσα εργασία ασχολείται με τις συμβολικά κατασκευασμένες συγγενειακές σχέσεις και κατά πόσο συχνά αυτές χαρακτηρίζονται ως ιδιοτελείς ή ανιδιοτελείς. Στο επίκεντρο βρίσκεται ένα Παιδικό Χωριό SOS και αφηγήσεις σχετικά με αυτό. Πρόκειται για αφηγήσεις που αφορούν πρακτικές σχετικά με τη γονεϊκότητα αλλά και για συναισθηματικές αφηγήσεις που διαμορφώνονται ως πρακτικές. Οι πληροφορητές- αφηγητές αντιμετωπίζονται ως δρώντα υποκείμενα. Η εργασία παρουσιάζει ότι υπάρχει ένα πάρε δώσε χρόνου, χρημάτων, (συν)αισθημάτων και οικείων βιωμάτων ανάμεσα στους πληροφορητές μέσα και έξω από το Χωριό. Αυτή η επικοινωνία εξετάζεται και ερμηνεύεται μέσω μιας θεώρησης μεταστρεψιμότητας και αντιστρεψιμότητας του συμβολικού, οικονομικού και συναισθηματικού κεφαλαίου. Υποστηρίζεται ότι οι αφηγήσεις αναπτύσσονται με τέτοιον τρόπο ώστε να ελέγξουν αυτή την σχέση και την επικοινωνία χρησιμοποιώντας διάφορες συμβολικές χειραγωγήσεις, όπως μεταφορικούς μηχανισμούς. Οι αφηγήσεις τοποθετούνται στο πλαίσιο μιας ιστορικής συνέχειας ως προς την πρόσληψη του εαυτού και της συγγένειας, καθώς συμβάλλουν στην κατασκευή της προσωπικής και οικογενειακής ταυτότητας του κάθε ατόμου. Επίσης, διαπιστώνονται συνέχειες και ασυνέχειες σχετικά με γνωστές ιδέες της ελληνικής κοινωνίας, όπως τον δεσμό μητέρας και παιδιού
description: The current thesis deals with the symbolic constructed relatedness and how often these relationships are characterized either selfish or selfless. The thesis focuses on a SOS Children s Village and on narrations about that. It is about narrations that are considered to consist of practices about parenthood as well as sentimental narrations that take the form of practices. The informants-narrators are approached as active subjects. The thesis presents an interchange of time, money, sentiments and familiar experiences between the informants inside and outside the Village. This communication is approached through the convertibility of the symbolic, economic and sentimental asset. The narrators seem to attempt to construct this communication in a symbolic way using, for example, metaphors. Their stories are also interpreted through the prism of a historical continuity concerning the conception of themselves and their relatedness while making their personal and family identity. Finally, the narrations are considered to consist of continuities and ruptures with familiar concepts of the Greek society, like the mother-child bond
Gas-Mediated Impact Dynamics in Fine-Grained Granular Materials
Creators: name: Royer, John R.
name: Corwin, Eric I.
name: Eng, Peter J.
name: Jaeger, Heinrich M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Non-cohesive granular media exhibit complex responses to sudden impact that often differ from those of ordinary solids and liquids. We investigate how this response is mediated by the presence of interstitial gas between the grains. Using high-speed x-ray radiography we track the motion of a steel sphere through the interior of a bed of fine, loose granular material. We find a crossover from nearly incompressible, fluid-like behavior at atmospheric pressure to a highly compressible, dissipative response once most of the gas is evacuated. We discuss these results in light of recent proposals for the drag force in granular media.
description: 4 pages, 4 figures, Accepted to PRL
Masses and decay constants of the $η$ and $η^\prime$ mesons from lattice QCD
Creators: name: Bali, Gunnar S.
name: Braun, Vladimir
name: Collins, Sara
name: Schäfer, Andreas
name: Simeth, Jakob
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We determine the masses, the singlet and octet decay constants as well as the anomalous matrix elements of the $η$ and $η^\prime$ mesons in $N_f=2+1$ QCD\@. The results are obtained using twenty-one CLS ensembles of non-perturbatively improved Wilson fermions that span four lattice spacings ranging from $a\approx 0.086\,$fm down to $a\approx 0.050\,$fm. The pion masses vary from $M_π=420\,$MeV to $126\,$MeV and the spatial lattice extents $L_s$ are such that $L_sM_π\gtrsim 4$, avoiding significant finite volume effects. The quark mass dependence of the data is tightly constrained by employing two trajectories in the quark mass plane, enabling a thorough investigation of U($3$) large-$N_c$ chiral perturbation theory (ChPT). The continuum limit extrapolated data turn out to be reasonably well described by the next-to-leading order ChPT parametrization and the respective low energy constants are determined. The data are shown to be consistent with the singlet axial Ward identity and, for the first time, also the matrix elements with the topological charge density are computed. We also derive the corresponding next-to-leading order large-$N_{c}$ ChPT formulae. We find $F^8 = 115.0(2.8)~\text{MeV}$, $θ_{8} = -25.8(2.3)^{\circ}$, $θ_0 = -8.1(1.8)^{\circ}$ and, in the $\overline{\mathrm{MS}}$ scheme for $N_f=3$, $F^{0}(μ= 2\,\mathrm{GeV}) = 100.1(3.0)~\text{MeV}$, where the decay constants read $F^8_η=F^8\cos θ_8$, $F^8_{η^\prime}=F^8\sin θ_8$, $F^0_η=-F^0\sin θ_0$ and $F^0_{η^\prime}=F^0\cos θ_0$. For the gluonic matrix elements, we obtain $a_η(μ= 2\,\mathrm{GeV}) = 0.0170(10)\,\mathrm{GeV}^{3}$ and $a_{η^{\prime}}(μ= 2\,\mathrm{GeV}) = 0.0381(84)\,\mathrm{GeV}^{3}$, where statistical and all systematic errors are added in quadrature.
description: 98 pages including appendices, 17 figures and 25 tables. v2: correction of minor typos, added references. v3: correction of minor typos, version as published
title: Sterownik logiczny PLC w rozproszonym systemie sterowania DCS
Creators: name: Hulewicz, Arkadiusz
name: Krawiecki, Zbigniew
name: Dziarski, Krzysztof
name: Duda, Maciej
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 167-178
title: Mikroprocesorowy układ sterowania ramieniem robota sygnałem elektromiograficznym
Creators: name: Trzmiel, Grzegorz
name: Kurz, Dariusz
name: Smoczyński, Wiktor
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 179-190
title: Niskobudżetowy inteligentny oczyszczacz powietrza przeznaczony dla niewielkich pomieszczeń użyteczności publicznej
Creators: name: Gojtowski, Michał
name: Idziak, Paweł
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 99, 201-212
Holomorphic anomaly and matrix models
Creators: name: Eynard, Bertrand
name: Marino, Marcos
name: Orantin, Nicolas
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The genus g free energies of matrix models can be promoted to modular invariant, non-holomorphic amplitudes which only depend on the geometry of the classical spectral curve. We show that these non-holomorphic amplitudes satisfy the holomorphic anomaly equations of Bershadsky, Cecotti, Ooguri and Vafa. We derive as well holomorphic anomaly equations for the open string sector. These results provide evidence at all genera for the Dijkgraaf--Vafa conjecture relating matrix models to type B topological strings on certain local Calabi--Yau threefolds.
description: 23 pages, LaTex, 3 figures
g-Factors and Discrete Energy Level Velocities in Nanoparticles
Creators: name: Mucciolo, Eduardo R.
name: Lewenkopf, Caio H.
name: Glazman, Leonid I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We establish relations between the statistics of g factors and the fluctuations of energy in metallic nanoparticles where spin-orbit coupling is present. These relations assume that the electron dynamics in the grain is chaotic. The expressions we provide connect the second moment of the g factor to the root-mean square ``level velocity'' (the derivative of the energy with respect to magnetic field) calculated at magnetic fields larger than a characteristic correlation field. Our predictions relate readily observable quantities and allow for a parameter-free comparison with experiments.
description: 4 pages, to appear in Phys. Rev. B Rapid Comm
Hawking temperature of black holes using the EUP and EGUP formalisms based on the Einstein-Bohr's photon box
Creators: name: Farahani, N.
name: Hassanabadi, H.
name: Chung, W. S.
name: Lutfuoglu, B. C.
name: Zarrinkamar, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, by studying the Einstein-Bohr's photon box for weighting a photon, we find that the effective Newton constant can be proposed by the extended uncertainty principle and extended generalized uncertainty principle. We obtain the modified Hawking temperature, mass, specific heat, and entropy by using the modified Schwarzschild metric.
description: 11 pages, 7 figures
Bimodalities : a survey of experimental data and models
Creators: name: Lopez, Olivier
name: Rivet, Marie-France
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Bimodal distributions of some chosen variables measured in nuclear collisions were recently proposed as a non ambiguous signature of a first order phase transition in nuclei. This section presents a compilation of both theoretical and experimental studies on bimodalities performed so far, in relation with the liquid-gas phase transition in nuclear matter.
description: 12 pages, 18 figures, 1 table Appeared in European Physics Journal A as part of the Topical Volume "Dynamics and Thermodynamics with Nuclear Degrees of Freedom"
Quark Model Estimates of the Structure of the Meson-N-N*(1535,1/2-) Transition Vertices
Creators: name: Dillig, M.
name: Rocha, S. S.
name: Marranghello, G. F.
name: Luetz, E. F.
name: Vasconcellos, C. A. Z.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We address an actual problem of baryon-resonance dominated meson-exchange processes in the low GeV regime, i.e. the phase and the structure of meson-NN* transition vertices. Our starting point is a quark-diquark model for the baryons (obeying approximate covariance; the mesons are kept as elementary objects), together with the relative phases for the NN vertices, as determined from low energy NN scattering. From the explicit representation of the N and N* baryons, we exemplify the derivation of the coupling constants and form factors of the NN*(1535,1/2-)transition vertices for pseudo-scalar, scalar and vector mesons.
description: 17 pages, 5 figures, 1 table
Black Holes With Many Horizons in the Theories of Nonlinear Electrodynamics
Creators: name: Gao, Changjun
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this article, we construct exact black hole solutions with many horizons (more than number two) in the Einstein-nonlinear electrodynamic theories. In particular, we acquire the explicit expression of nonlinear electrodynamic Lagrangian for the 3-horizon black holes. Then we make the investigations of 3-horizon black holes on the horizons, the null and timelike geodesics, the Love numbers and the thermodynamics.
description: 15 pages,5 figures,some references added. To appear in PRD
Ο μύθος της γυναικότητας στην γυναικεία μεταϋπερρεαλιστική ποίηση
Creators: name: Λιάπη, Μαρκία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Φεμινιστική Θεωρία
Γυναικότητα
Γυναικεία τέχνη
Feminist Theory
Womanness
Women’s Art

description: Σκοπός αυτής της διπλωματικής εργασίας είναι να μελετήσει την διαμόρφωση του μύθου της γυναικείας ζωής στο σώμα της γυναικείας μεταϋπερρεαλιστικής ποίησης. Πιο συγκεκριμένα, με βάση μια επιλογή από το έργο τριών αντιπροσωπευτικών γυναικείων ποιητικών φωνών της μεταυπερρεαλιστικής παραγωγής (της Margaret Atwood, της Κατερίνας Αγγελάκη-Ρουκ και της Αθηνάς Παπαδάκη) ερευνήσαμε τον τρόπο με τον οποίο δύο γνωστές μυθικές ηρωίδες (η Κίρκη και η Πηνελόπη) και μια νέα (η Νοικοκυρά) οργανώνονται γύρω από τρεις βασικούς άξονες: την αντίσταση στο δυτικό βλέμμα (gaze) του άνδρα-δημιουργού (έναν όρο δανεισμένο από την εικαστική κριτική), την προσπάθεια της γυναικείας δημιουργίας να μελετήσει τη γυναικεία εμπειρία και την επιθυμία της να υποκειμενοποιηθεί μέσω αυτής. Οι τρεις ποιήτριες μυθοποιώντας τρεις πλευρές του γυναικείου ρόλου (της μαγείας, της ύφανσης και της οικιακότητας) αποκαλύπτουν τους τρόπους ελέγχου της γυναικείας δράσης από το ανδρικό βλέμμα (τον σεξιστικό, τον χειραγωγικό και τον ύποπτο) και κατασκευάζουν μια γυναικεία, μητριαία και σχεσιακή γλώσσα δημιουργίας και υποκειμενοποίησης, βασισμένη στη μαγεία, την ύφανση και την οικιακότητα ως αντιθετικούς δημιουργικούς τρόπους από τον αποδεκτό δυτικό πολιτισμικό κώδικα. Τελικά, αυτό που αποδεικνύεται είναι η διαρκής προσπάθεια του γυναικείου να υποκειμενοποιηθεί μέσα από τη δημιουργική προσέγγιση της γυναικότητας. Προς επίρρωση των συμπερασμάτων, μελετούνται διεξοδικά παραδείγματα από την σύγχρονη γυναικεία εικαστική παραγωγή
description: The aim of this thesis is to study the formation of the myth of womanness in the body of woman’s post-surrealist poetry. More specifically, based on a collection from the work of three representative female poetic voices (Margaret Atwood, Katerina Aggelaki Rouk, Athina Papadakis) we tried to describe the way in which two established mythical heroines (Circe and Penelope) and one new (the Housewife) are being organized around three basic structures: the resistance against the acts of the male gaze (a term taken from the field of art history), the woman’s creation struggle to study profoundly the female experience and her desire for subjectivity through this act. The three works, mythologizing three fundamental aspects of woman’s social role (the witchcraft, the weaving and the domesticity), reveal the methods of controlling the becoming of woman under the constant male gaze (the sexist, the patronizing and the suspicious) and form a female, matrixial and associative code of creation and subjectivity, founded on the witchcraft, the weaving and the domesticity as opposed to the established western civilization creative manners. In the end, the female constant struggle to reach subjectivity through the creative transformation of womanness is proven. In support to our conclusions, we studied at length examples of contemporary woman’s artistic production
Όψεις της παραδοσιακής αρχιτεκτονικής στην Κρήτη, με βάση τον οικισμό Χρωμοναστήρι και την κοντινή ενδοχώρα του Ρεθύμνου: διερεύνηση των διαχρονικών χαρακτηριστικών, της καθημερινότητας των προηγούμεν
Creators: name: Χαριτόπουλος, Ευάγγελος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Κρήτη-Οικισμοί
Παραδοσιακή αρχιτεκτονική
Crete-Settlements
Vernacular Architecture

description: Σκοπός της παρούσας διπλωματικής ήταν η μελέτη όψεων της κρητικής παραδοσιακής αρχιτεκτονικής, με περιοχή μελέτης την κοντινή ενδοχώρα του Ρεθύμνου. Η χρονολογική περίοδος μελέτης αφορά το διάστημα των επτά αιώνων που κράτησε η βενετική και οθωμανική κυριαρχία στο νησί. Το πρώτο τμήμα της μελέτης αποτελεί η διερεύνηση της πολεοδομικής εξέλιξης των οικισμών με επικέντρωση σε τρεις ενδεικτικούς οικισμούς, το Χρωμοναστήρι, τη Μέση και το Σελλί. Στη συνέχεια προσεγγίστηκε η πρόσληψη του δομημένου περιβάλλοντος από τους ανθρώπους των προηγούμενων αιώνων, με βάση δεδομένα από γραπτές κυρίως αλλά και εικονογραφικές πηγές. Στο τρίτο τμήμα έγινε συστηματοποίηση και κριτική προσέγγιση των τυπολογικών, κατασκευαστικών και μορφολογικών χαρακτηριστικών της παραδοσιακής αρχιτεκτονικής στην Κρήτη, καθώς και των ερμηνευτικών και χρονολογικών προσεγγίσεων, με βάση την υπάρχουσα βιβλιογραφία, ενώ στη συνέχεια έγινε διασταύρωση στο πεδίο με οικήματα από τον κηρυγμένο ως διατηρητέο οικισμό Χρωμοναστήρι. Η εργασία ολοκληρώθηκε με την αποτίμηση του νομοθετικού πλαισίου και περιπτώσεων αποκατάστασης παραδοσιακών κτηρίων και συνόλων από την περιοχή μελέτης, θέτοντας παράλληλα ζητήματα προς την κατεύθυνση ενός καθορισμού πλαισίου καλών πρακτικών συντήρησης και συμβατής επανάχρησης της παραδοσιακής αρχιτεκτονικής
description: The aim of the present dissertation was the study of aspects of the Cretan vernacular architecture, having as area of study the close hinterland of Rethymnon. The chronological period of the study covers the time span of Venetian and Ottoman rule on the island. The research of the development of settlements forms the first part of the dissertation, focusing on three traditional villages as case study, namely Chromonastiri, Mesi and Selli. Then the notion of the built environment by people of previous centuries was surveyed through data from written and iconographic sources. In the third part a systematization and critical approach of typological, constructional, and morphological characteristics of the vernacular architecture in Crete took place, accompanied by a cross-check in field with historic buildings in the listed village Chromonastiri. Concluding with an assessment of the related legislation and cases of reconstructed buildings and settlements, issues addressed towards the formation of a framework of good practices for conservation and adaptive reuse of vernacular architecture
Διάχυση στα Νανοκρυσταλλικά Στερεά
Creators: name: Λάππας, Κίμων-Ιωάννης Ταξιάρχη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Μέταλλα-Διάχυση
Νανοκρύσταλλοι
Metals-Diffusion
Nanocrystals

description: Στην παρούσα διπλωματική εργασία μελετάται η διάχυση στα νανοκρυσταλλικά στερεά με το συνεχές μοντέλο διάχυσης/ μοντέλο διπλοδιάχυσης που εισήχθη από τον Aifantis το 1979. Ο στόχος της εργασίας είναι να εφαρμοστεί το μοντέλο σε πειραματικά δεδομένα διάχυσης σε νανοκρυσταλλικά και εξαιρετικά λεπτόκοκκα στερεά. Επιπλέον, αποδεικνύεται ότι μπορεί να ερμηνεύσει επαρκώς την τριπλοδιάχυση. Αυτό έχει συμβεί μόνο μία φορά, από όσο γνωρίζω τουλάχιστον, στο παρελθόν, με χρήση άλλου μοντέλου, χωρίς ωστόσο, να παραχθούν καλά αποτελέσματα. Η τελευταία παρατήρηση προσδίδει πρωτοτυπία στην παρούσα εργασία. Οι παρατηρήσεις για τη συμπεριφορά των φαινομενολογικών σταθερών του συνεχούς μοντέλου από παλαιότερες δημοσιεύσεις επιβεβαιώνονται ενώ ταυτόχρονα παρουσιάζονται κάποιες θεωρητικές προεκτάσεις παλαιότερων μεθοδολογιών που αφορούν την εφαρμογή του συνεχούς μοντέλου στα κρυσταλλικά στερεά. Εν κατακλείδι, παράγονται fits για τριπλοδιάχυση σε εξαιρετικά λεπτόκοκκα υλικά, για διπλοδιάχυση σε νανοκρυσταλλικά υλικά. Όπου είναι εφικτό παρατίθενται και οι εξισώσεις και τα διαγράμματα Arrhenius τόσο για τους συντελεστές διάχυσης του μοντέλου, όσο και για τις φαινομενολογικές του σταθερές
description: In the present thesis diffusion in nanocrystalline solids is studied with the use of the continuum/ double-diffusivity model that was initially proposed by Aifantis in 1979. The aim of the thesis is for the aforementioned model to be applied in experimental data of diffusion in nanocrystalline and ultra-fine grained solids. In addition, it is proven that the model is capable of adequately describing triple-diffusivity. To the author’s knowledge, this has been done once in the past with the use of another model, although, without producing good results. This last observation provides originality in the present thesis. The comments pertaining to the behavior of the phenomenological constants of the continuum model reported in earlier works are confirmed, while some theoretical extensions of older methodologies concerning the application of the continuum model in crystalline solids are presented. Finally, fittings of experimental data on triple-diffusivity in ultra-fine grained solids, and on double-diffusivity in nanocrystalline solids are produced. Wherever possible, the corresponding Arrhenius equations and plots both for the diffusion coefficients and for the phenomenological constants of the model, are provided