cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Automated crystal orientation mapping by precession electron diffraction assisted four-dimensional scanning transmission electron microscopy (4D-STEM) using a scintillator based CMOS detector
Creators: name: Jeong, Jiwon
name: Cautaerts, Niels
name: Dehm, Gerhard
name: Liebscher, Christian H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The recent development of electron sensitive and pixelated detectors has attracted the use of four-dimensional scanning transmission electron microscopy (4D-STEM). Here, we present a precession electron diffraction assisted 4D-STEM technique for automated orientation mapping using diffraction spot patterns directly captured by an in-column scintillator based complementary metal-oxide-semiconductor (CMOS) detector. We compare the results to a conventional approach, which utilizes a fluorescent screen filmed by an external CCD camera. The high dynamic range and signal-to-noise characteristics of the detector largely improve the image quality of the diffraction patterns, especially the visibility of diffraction spots at high scattering angles. In the orientation maps reconstructed via the template matching process, the CMOS data yields a significant reduction of false indexing and higher reliability compared to the conventional approach. The angular resolution of misorientation measurement could also be improved by masking reflections close to the direct beam. This is because the orientation sensitive, weak and small diffraction spots at high scattering angle are more significant. The results show that fine details such as nanograins, nanotwins and sub-grain boundaries can be resolved with a sub-degree angular resolution which is comparable to orientation mapping using Kikuchi diffraction patterns.
Το πρόβλημα MQ: Επιθέσεις στον AES και το πρόβλημα του διακριτού λογάριθμου επί ελλειπτικών καμπυλών
Creators: name: Τζάτζιου, Βασίλειος Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Πολυμεταβλητό τετραγωνικό πρόβλημα
AES
Διακριτός λογάριθμος επί ελλειπτικών καμπυλών
Multivariate quadratic problem (MQ)
Advanced Encryption Standard (AES)
Elliptic curve discrete logarithm problem

description: Σκοπός αυτής της εργασίας ήταν η μελέτη του ρόλου του πολύμεταβλητού τετραγωνικού προβλήματος σε δύο βασικά θέματα της σύγχρονης Κρυπτογραφίας, τον AES και τις ελλειπτικές καμπύλες. Πιο συγκεκριμένα, παρουσιάσαμε μια σειρά από αλγορίθμους που καταγράφονται στην βιβλιογραφία οι οποίοι αφορούν την επίλυση του προβλήματος αυτού πάνω από πεπερασμένα σώματα. Στη συνέχεια, εισάγαμε μία δική μας παραλλαγή ενός τέτοιου αλγορίθμου που μειώνει την απαιτούμενη μνήμη, συνοδευόμενη από κάποια σχετικά πειράματα. Σχετικά με τις εφαρμογές του πολυμεταβλητού προβλήματος στην κρυπτογραφία, αρχικά περιγράψαμε πως οποιοδήποτε σύστημα τύπου AES μπορεί να γραφεί ως ένα πολυμεταβλητό τετραγωνικο σύστημα εξισώσεων καθώς και παρουσιάσαμε μια σχετική επίθεση σε τέτοιο είδους μικρής κλίμακας σύστηματα. Ακόμη, εξηγήσαμε πως η επίλυση του προβλήματος του διακριτού λογαρίθμου επί ελλειπτικών καμπυλών μπορεί να αναχθεί στην επίλυση ενός συστήματος εξισώσεων δευτέρου βαθμού πάνω από ένα πεπερασμένο σώμα
description: The aim of the present thesis was the study the role of the multivariate quadratic problem (MQ) in two major topics of modern cryptography, AES and elliptic curves. Specifically, we presented a series of algorithms to solve it over finite fields. To continue, we introduced our custom variant of such an algorithm that decreases the demanded computer memory, accompanied with relevant experiments. As far as the applications of MQ in modern cryptography are concerned, we first described how any AES type system can be written as a multivariate quadratic system of equations as well as we presented a possible attack to such small scale systems. Moreover, we explained how the solution of the elliptic curve discrete logarithm problem can be reduced to solving a system of equations of second order over a finite field.
A three-parameter model for the neutrino mass matrix
Creators: name: Grimus, W.
name: Lavoura, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using the type-II seesaw mechanism with three Higgs doublets phi_alpha (alpha = e, mu, tau) and four Higgs triplets, we build a model for lepton mixing based on a 384-element horizontal symmetry group, generated by the permutation group S_3 and by six Z_2 transformations. The charged-lepton mass matrix is diagonal; the symmetries of the model would require all the three masses m_alpha to be equal, but different vacuum expectation values of the phi_alpha allow the m_alpha to split. The number of parameters in the Majorana neutrino mass matrix m_nu depends on two options: full breaking of the permutation group S_3, or leaving a mu--tau interchange symmetry intact; and hard or spontaneous violation of CP. We discuss in detail the case with the minimal number of three parameters, wherein m_nu is real, symmetric under mu--tau interchange, and has equal diagonal elements. In that case, CP is conserved in lepton mixing, atmospheric neutrino mixing is maximal, and theta_{13} = 0; moreover, the type of neutrino mass spectrum and the absolute neutrino mass scale are sensitive functions of the solar mixing angle.
description: 16 pages, one eps figure; some clarifications added, contains new section 5, version accepted for publication in J. Phys. G
In Ovo Sexing of Chicken Embryos Using Different Techniques
Creators: name: Mojarla Raghavendar1, Dr. T. Srilatha2, Mendu Mounika3
Publisher: name: The Science world a Monthly e magazine
Year: 2023

description: The current ethical dilemma with egg production is chick culling of one-day-old male chicks, which kills billions of male chicks each year as part of the production process. The chicks are sexed on the day they emerge from their eggs. The day-old chicks are separated into groups of males and females for chick sexing. After sexing, female chicks are taken to rearing farms where they are kept until they are transferred to laying hen or broiler farms &the majority of male chicks that hatch after being sexed as male are killed.
Electroweak monopoles with a non-linearly realized weak hypercharge
Creators: name: De Fabritiis, P.
name: Helayël-Neto, J. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a finite-energy electroweak-monopole solution obtained by considering non-linear extensions of the hypercharge sector of the Electroweak Theory, based on logarithmic and exponential versions of electrodynamics. We find constraints for a class of non-linear extensions and also work out an estimate for the monopole mass in this scenario. We finally derive a lower bound for the energy of the monopole and discuss the simpler case of a Dirac magnetic charge.
description: 8 pages, published in EPJC
A survey of some norm inequalities
Creators: name: Gesztesy, Fritz
name: Nichols, Roger
name: Stanfill, Jonathan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary: 47A30, 34L40, Secondary: 47B25, 47B44

description: We survey some classical norm inequalities of Hardy, Kallman, Kato, Kolmogorov, Landau, Littlewood, and Rota of the type \[ \|A f\|_{\mathcal{X}}^2 \leq C \|f\|_{\mathcal{X}} \big\|A^2 f\big\|_{\mathcal{X}}, \quad f \in dom\big(A^2\big), \] and recall that under exceedingly stronger hypotheses on the operator $A$ and/or the Banach space $\mathcal{X}$, the optimal constant $C$ in these inequalities diminishes from $4$ (e.g., when $A$ is the generator of a $C_0$ contraction semigroup on a Banach space $\mathcal{X}$) all the way down to $1$ (e.g., when $A$ is a symmetric operator on a Hilbert space $\mathcal{H}$). We also survey some results in connection with an extension of the Hardy-Littlewood inequality involving quadratic forms as initiated by Everitt.
description: 28 pages, some updates added
Colloquium: Theory of Drag Reduction by Polymers in Wall Bounded Turbulence
Creators: name: Procaccia, Itamar
name: L'vov, Victor S.
name: Benzi, Roberto
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The flow of fluids in channels, pipes or ducts, as in any other wall-bounded flow (like water along the hulls of ships or air on airplanes) is hindered by a drag, which increases many-folds when the fluid flow turns from laminar to turbulent. A major technological problem is how to reduce this drag in order to minimize the expense of transporting fluids like oil in pipelines, or to move ships in the ocean. It was discovered in the mid-twentieth century that minute concentrations of polymers can reduce the drag in turbulent flows by up to 80%. While experimental knowledge had accumulated over the years, the fundamental theory of drag reduction by polymers remained elusive for a long time, with arguments raging whether this is a "skin" or a "bulk" effect. In this colloquium review we first summarize the phenomenology of drag reduction by polymers, stressing both its universal and non-universal aspects, and then proceed to review a recent theory that provides a quantitative explanation of all the known phenomenology. We treat both flexible and rod-like polymers, explaining the existence of universal properties like the Maximum Drag Reduction (MDR) asymptote, as well as non-universal cross-over phenomena that depend on the Reynolds number, on the nature of the polymer and on its concentration. Finally we also discuss other agents for drag reduction with a stress on the important example of bubbles.
description: Invited Colloquium Paper for Reviews of Modern Physics, 24 pages, 18 Figs., submitted
Classical instability of Kerr-AdS black holes and the issue of final state
Creators: name: Cardoso, Vitor
name: Dias, Oscar J. C.
name: Yoshida, Shijun
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is now established that small Kerr-Anti-de Sitter (Kerr-AdS) black holes are unstable against scalar perturbations, via superradiant amplification mechanism. We show that small Kerr-AdS black holes are also unstable against gravitational perturbations and we compute the features of this instability. We also describe with great detail the evolution of this instability. In particular, we identify its endpoint state. It corresponds to a Kerr-AdS black hole whose boundary is an Einstein universe rotating with the light velocity. This black hole is expected to be slightly oblate and to co-exist in equilibrium with a certain amount of outside radiation.
description: 11 pages, RevTex4. v2: small typos corrected. Version to appear in Phys. Rev. D
Optimal control of dynamic systems through the reinforcement learning of transition points
Creators: name: Buckland, Kenneth M.
Publisher: name: University of British Columbia
Year: 2009

description: This work describes the theoretical development and practical application of transition point dynamic programming (TPDP). TPDP is a memory-based, reinforcement learning, direct dynamic programming approach to adaptive optimal control that can reduce the learning time and memory usage required for the control of continuous stochastic dynamic systems. TPDP does so by determining an ideal set of transition points (TPs) which specify, at various system states, only the control action changes necessary for optimal control. TPDP converges to an ideal TP set by using a variation of Q-learning to assess the merits of adding, swapping and removing TPs from states throughout the state space. This work first presents how optimal control is achieved using dynamic programming, in particular Q-learning. It then presents the basic TPDP concept and proof that TPDP converges to an ideal set of TPs. After the formal presentation of TPDP, a Practical TPDP Algorithm will be described which facilitates the application of TPDP to practical problems. The compromises made to achieve good performance with the Practical TPDP Algorithm invalidate the TPDP convergence proofs, but near optimal control policies were nevertheless learned in the practical problems considered. These policies were learned very quickly compared to conventional Q-learning, and less memory was required during the learning process. A neural network implementation of TPDP is also described, and the possibility of this neural network being a plausible model of biological movement control is speculated upon. Finally, the incorporation of TPDP into a complete hierarchical controller is discussed, and potential enhancements of TPDP are presented.
Generalized exponential function and discrete growth models
Creators: name: Martinez, Alexandre Souto
name: Gonzalez, Rodrigo Silva
name: Espindola, Aquino Lauri
Publisher: name: arXiv
Year: 2008
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Here we show that a particular one-parameter generalization of the exponential function is suitable to unify most of the popular one-species discrete population dynamics models into a simple formula. A physical interpretation is given to this new introduced parameter in the context of the continuous Richards model, which remains valid for the discrete case. From the discretization of the continuous Richards' model (generalization of the Gompertz and Verhuslt models), one obtains a generalized logistic map and we briefly study its properties. Notice, however that the physical interpretation for the introduced parameter persists valid for the discrete case. Next, we generalize the (scramble competition) $θ$-Ricker discrete model and analytically calculate the fixed points as well as their stability. In contrast to previous generalizations, from the generalized $θ$-Ricker model one is able to retrieve either scramble or contest models.
description: 7 pages, 6 figures and 2 tables
Quantum master equations from classical Lagrangians with two stochastic forces
Creators: name: Dodonov, A. V.
name: Mizrahi, S. S.
name: Dodonov, V. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show how a large family of master equations, describing quantum Brownian motion of a harmonic oscillator with translationally invariant damping, can be derived within a phenomenological approach, based on the assumption that an environment can be simulated by two classical stochastic forces. This family is determined by three time-dependent correlation functions (besides the frequency and damping coefficients), and it includes as special cases the known master equations, whose dissipative part is bilinear with respect to the operators of coordinate and momentum.
description: 10 pages, no figures
Eros, matrimonio e divorzio. Un tema satirico (e non) nel libro decimo di Marziale
Creators: name: Alessandro, Fusi
Publisher: name: Zenodo
Year: 2020
Subjects: Marziale
epigrammi satirici
intratestualità

description: This study examines the structural function of the marriage-divorce theme in the second edition of Martial's book 10, which is built around the poet's decision to move back to Spain, leaving his beloved domina Rome after more than thirty years. The paper, in the wake of recent works on intratextuality and especially on the structure of Martial's books, takes into exam the book's epigrams devoted to the marriage-divorce theme, declined in satiric as well as serious way, with the aim of enlightening links between texts, which the poet sets up to increase the book's compactness and to enrich at the same time individual poems with further meaning, inside a sophisticated texture that he presents to his generic lectors, real authors of his lasting fame.
Open model-based analysis of a 100% renewable and sector-coupled energy system -- The case of Germany in 2050
Creators: name: Maruf, Md Nasimul Islam
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The ambitious energy target to achieve climate-neutrality in the European Union (EU) energy system raises the feasibility question of using only renewables across all energy sectors. As one of the EU's leading industrialized countries, Germany has adopted several climate-action plans for the realistic implementation and maximum utilization of renewable energies in its energy system. The literature review shows a clear gap in comprehensive techniques describing an open modeling approach for analyzing fully renewable and sector-coupled energy systems. This paper outlines a method for analyzing the 100% renewable-based and sector-coupled energy system's feasibility in Germany. Based on the open energy modeling framework, an hourly optimization tool 'OSeEM-DE' is developed to investigate the German energy system. The model results show that a 100% renewable-based and sector-coupled system for electricity and building heat is feasible in Germany. The investment capacities and component costs depend on the parametric variations of the developed scenarios. The annual investment costs vary between 17.6 and 26.6 bn Euro/yr for volatile generators and between 23.7 and 28.8 bn Euro/yr for heat generators. The model suggests an investment of a minimum of 2.7-3.9 bn Euro/yr for electricity and heat storage. Comparison of OSeEM-DE results with recent studies validates the percentage-wise energy mix composition and the calculated Levelized Cost of Electricity (LCOE) values from the model. Sensitivity analyses indicate that storage and grid expansion maximize the system's flexibility and decrease the investment cost. The study concludes by showing how the tool can analyze different energy systems in the EU context.
description: Published version. This is an open-access article distributed under the terms of the Creative Commons CC-BY license
Application of the iterative moment method for dielectric scattering calculations
Creators: name: Huang, Xiaomin
Publisher: name: University of British Columbia
Year: 2009

description: In this thesis, the calculation of the electromagnetics(EM) scattering of three dimensional, irregular, inhomogeneous and lossy dielectric objects is discussed. The iterative moment method (MM) which can solve problems involving a large number of unknowns than the conventional MM is used. For result comparison and checking, conventional MM is discussed too. Generally, the method also applies for any arbitrarily shaped penetrable body with arbitrary dielectric distributions which will have importance in communication, medical, biological, meterological and military studies. A new melting-snow particle model is presented in this thesis, based on physical observations or assumptions. The EM scattering cross-sections of the new melting-snow model are evaluated at certain frequencies, melting factors and rain rates by the iterative MM. The analyses of the new model give us a better understanding to the EM scattering property of melting snow particles at the early stage and to the effect of outer layer water distributions on the scattering of melting snow. The results obtained are compared with those of two other existing models. The comparison shows that the different melting snow particle models have different scattering properties; the different melting water distributions assumed significantly affect the scattered fields. The validity of the iterative MM for large number of unknowns has been shown. The numerical calculation examples in this thesis prove the equivalence of the two moment methods at special choice of basis functions and weighting functions. The thesis also discusses the computer realization of the two moment methods, compares their advantages and disadvantages. Conclusions regarding the choice of subcell size and the initial guess, the convergence and precision, computer memory, and computing time are obtained which will have academic interests.
Supplement S2: in silico admixture of Northern and Central European genotypes from Assortative mating frames establishment in a young island bird population
Creators: name: Engler, Jan O.
name: Sacher, Thomas
name: Coppack, Timothy
name: Bairlein, Franz
Publisher: name: Figshare
Year: 2019
Subjects: subject: Molecular Biology
subject: Ecology
subject: FOS: Biological sciences

description: Describes the methodology to test the level of putative hybridization under different scenaria given the available genotypic information.
Basic Logic and Quantum Entanglement
Creators: name: Zizzi, Paola
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Logic (math.LO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: As it is well known, quantum entanglement is one of the most important features of quantum computing, as it leads to massive quantum parallelism, hence to exponential computational speed-up. In a sense, quantum entanglement is considered as an implicit property of quantum computation itself. But...can it be made explicit? In other words, is it possible to find the connective "entanglement" in a logical sequent calculus for the machine language? And also, is it possible to "teach" the quantum computer to "mimic" the EPR "paradox"? The answer is in the affirmative, if the logical sequent calculus is that of the weakest possible logic, namely Basic logic. A weak logic has few structural rules. But in logic, a weak structure leaves more room for connectives (for example the connective "entanglement"). Furthermore, the absence in Basic logic of the two structural rules of contraction and weakening corresponds to the validity of the no-cloning and no-erase theorems, respectively, in quantum computing.
description: 10 pages, 1 figure,LaTeX. Shorter version for proceedings requirements. Contributed paper at DICE2006, Piombino, Italy
The Origin of Galactic Cosmic Rays as Revealed by their Composition
Creators: name: Tatischeff, Vincent
name: Raymond, John C.
name: Duprat, Jean
name: Gabici, Stefano
name: Recchia, Sarah
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Galactic cosmic-rays (GCRs) are thought to be accelerated in strong shocks induced by massive star winds and supernova explosions sweeping across the interstellar medium. But the phase of the interstellar medium from which the CRs are extracted has remained elusive until now. Here, we study in detail the GCR source composition deduced from recent measurements by the AMS-02, Voyager 1 and SuperTIGER experiments to obtain information on the composition, ionisation state and dust content of the GCR source reservoirs. We show that the volatile elements of the CR material are mainly accelerated from a plasma of temperature higher than $\sim 2$ MK, which is typical of the hot medium found in galactic superbubbles energised by the activity of massive star winds and supernova explosions. Another GCR component, which is responsible for the overabundance of $^{22}$Ne, most likely arises from acceleration of massive star winds in their termination shocks. From the CR-related $γ$-ray luminosity of the Milky Way, we estimate that the ion acceleration efficiency in both supernova shocks and wind termination shocks is of the order of $10^{-5}$. The GCR source composition also shows evidence for a preferential acceleration of refractory elements contained in interstellar dust. We suggest that the GCR refractories are also produced in superbubbles, from shock acceleration and subsequent sputtering of dust grains continuously incorporated into the hot plasma through thermal evaporation of embedded molecular clouds. Our model explains well the measured abundances of all primary and mostly primary CRs from H to Zr, including the overabundance of $^{22}$Ne.
description: 24 pages, 18 figures, submitted to MNRAS. Version 2: as accepted for publication
The velocity dispersion function of early-type galaxies and its redshift evolution: the newest results from lens redshift test
Creators: name: Geng, Shuaibo
name: Cao, Shuo
name: Liu, Yuting
name: Liu, Tonghua
name: Biesiada, Marek
name: Lian, Yujie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The redshift distribution of galactic-scale lensing systems provides a laboratory to probe the velocity dispersion function (VDF) of early-type galaxies (ETGs) and measure the evolution of early-type galaxies at redshift z ~ 1. Through the statistical analysis of the currently largest sample of early-type galaxy gravitational lenses, we conclude that the VDF inferred solely from strong lensing systems is well consistent with the measurements of SDSS DR5 data in the local universe. In particular, our results strongly indicate a decline in the number density of lenses by a factor of two and a 20% increase in the characteristic velocity dispersion for the early-type galaxy population at z ~ 1. Such VDF evolution is in perfect agreement with the $Λ$CDM paradigm (i.e., the hierarchical build-up of mass structures over cosmic time) and different from "stellar mass-downsizing" evolutions obtained by many galaxy surveys. Meanwhile, we also quantitatively discuss the evolution of the VDF shape in a more complex evolution model, which reveals its strong correlation with that of the number density and velocity dispersion of early-type galaxies. Finally, we evaluate if future missions such as LSST can be sensitive enough to place the most stringent constraints on the redshift evolution of early-type galaxies, based on the redshift distribution of available gravitational lenses.
description: 9 pages, 4 figures, accepted for publication in MNRAS
Validation of the Jarzynski relation for a system with strong thermal coupling: an isothermal ideal gas model
Creators: name: Baule, A.
name: Evans, R. M. L.
name: Olmsted, P. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We revisit the paradigm of an ideal gas under isothermal conditions. A moving piston performs work on an ideal gas in a container that is strongly coupled to a heat reservoir. The thermal coupling is modelled by stochastic scattering at the boundaries. In contrast to recent studies of an adiabatic ideal gas with a piston [R.C. Lua and A.Y. Grosberg, \textit{J. Phys. Chem. B} 109, 6805 (2005); I. Bena et al., \textit{Europhys. Lett.} 71, 879 (2005)], container and piston stay in contact with the heat bath during the work process. Under this condition the heat reservoir as well as the system depend on the work parameter $λ$ and microscopic reversibility is broken for a moving piston. Our model is thus not included in the class of systems for which the non-equilibrium work theorem has been derived rigorously either by Hamiltonian [C. Jarzynski, \textit{J. Stat. Mech.} P09005 (2004)] or stochastic methods [G.E. Crooks, \textit{J. Stat. Phys.} 90, 1481 (1998)]. Nevertheless the validity of the non-equilibrium work theorem is confirmed both numerically for a wide range of parameter values and analytically in the limit of a very fast moving piston, i.e. in the far non-equilibrium regime.
description: 11 pages, 8 figures
Ideophones, postpositions, tone
Creators: name: Doko, Jeanne
name: Koutouan, Evelyne
name: Jarvis, Rebecca
name: Kouadio, Timothée
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: ebr

description: Elicitation of ideophones related to noise (heartbeat, animal sounds) and postpositions related to location.
Broad-band X-ray spectra and timing of the accretion-powered millisecond pulsar Swift J1756.9$-$2508 during its 2018 and 2019 outbursts
Creators: name: Li, Z. S.
name: Kuiper, L.
name: Falanga, M.
name: Poutanen, J.
name: Tsygankov, S. S.
name: Galloway, D. K.
name: Bozzo, E.
name: Pan, Y. Y.
name: Huang, Y.
name: Zhang, S. N.
name: Zhang, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The accreting millisecond X-ray pulsar Swift J1756.9$-$2508 went into outburst in April 2018 and June 2019, 8.7 yr after the previous activity period. We investigated the temporal, timing and spectral properties of these two outbursts using data from NICER, XMM-Newton, NuSTAR, INTEGRAL, Swift and Insight-HXMT. The two outbursts exhibited similar broad-band spectra and X-ray pulse profiles. For the first time, we report the detection of the pulsed emission up to $\sim100$ keV observed by Insight-HXMT during the 2018 outburst. We also found the pulsation up to $\sim60$ keV observed by NICER and NuSTAR during the 2019 outburst. We performed a coherent timing analysis combining the data from two outbursts. The binary system is well described by a constant orbital period over a time span of $\sim12$ years. The time-averaged broad-band spectra are well fitted by an absorbed thermal Comptonization model in a slab geometry with the electron temperature $kT_{\rm e}=40$-50 keV, Thomson optical depth $τ\sim 1.3$, blackbody seed photon temperature $kT_{\rm bb,seed}\sim $0.7-0.8 keV and hydrogen column density of $N_{\rm H}\sim 4.2\times10^{22}$ cm$^{-2}$. We searched the available data for type-I (thermonuclear) X-ray bursts, but found none, which is unsurprising given the estimated low peak accretion rate ($\approx0.05$ of the Eddington rate) and generally low expected burst rates for hydrogen-poor fuel. Based on the history of four outbursts to date, we estimate the long-term average accretion rate at roughly $5\times10^{-12}\ M_\odot\,{\rm yr}^{-1}$ for an assumed distance of 8 kpc. The expected mass transfer rate driven by gravitational radiation in the binary implies the source can be no closer than 4 kpc.
description: Accepted for publication in A&A
Το ευρωπαϊκό κληρονομητήριο κατά τον Κανονισμό (ΕΕ) 650/2012
Creators: name: Γόντη, Ευτυχία Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ευρωπαϊκό κληρονομητήριο
Κανονισμός 650/2012
Κληρονομική διαδοχή
European certificate of succession
Regulation 650/2012
Succession

description: Σκοπός της εν λόγω διπλωματικής εργασίας είναι η μελέτη του ευρωπαϊκού κληρονομητηρίου, ενός καινοτόμου θεσμού που εισήχθη με τον Κανονισμό (ΕΕ) 650/2012. Πρόκειται για ένα ενιαίο ευρωπαϊκό πιστοποιητικό, το οποίο διευκολύνει τους κληρονόμους, κληροδόχους, εκτελεστές διαθήκης ή διαχειριστές της κληρονομιαίας περιουσίας να αποδεικνύουν ευχερώς σε άλλο κράτος μέλος την ιδιότητα, τα δικαιώματα και τις εξουσίες τους που πηγάζουν από διασυνοριακές κληρονομικές διαδοχές. Στην παρούσα εργασία παρουσιάζεται αρχικά η πορεία προς τη θέσπιση του εν λόγω Κανονισμού και μια σύντομη επισκόπηση των σημαντικότερων ρυθμίσεών του, ενώ εν συνεχεία επιχειρείται η παρουσίαση των βασικών χαρακτηριστικών του ευρωπαϊκού κληρονομητηρίου. Κατόπιν, αναλύεται η διαδικασία έκδοσης του εν λόγω πιστοποιητικού από το στάδιο υποβολής της αίτησης έως την έκδοση σχετικής απόφασης και επισημαίνονται τα σημαντικότερα αποτελέσματά του. Τέλος, παρουσιάζονται οι δυνατότητες διόρθωσης, τροποποίησης, ανάκλησης και αναστολής ισχύος του κληρονομητηρίου, αλλά και η άσκηση ενδίκων μέσων
description: The aim of the present thesis is the study of the European Certificate of Succession, which constitutes an innovative institution introduced by Regulation (EU) No 650/2012. It is a uniform certificate, facilitating the heirs, legatees, executors of the will or administrators of the estate to demonstrate easily their status, rights and powers arising from a succession with cross-border implications in another Member State. In the present thesis, the progress towards the enactment of the aforementioned Regulation and a brief overview of its most significant provisions are firstly presented. Next, the basic characteristics of the European Certificate of Succession are mentioned. Furthermore, the issuing process of the aforesaid certificate is examined, from the stage of submitting an application to the stage of issuing a relevant decision, while its most important effects are also highlighted. Finally, the possibilities of rectification, modification, withdrawal of the Certificate and suspension of its effects are presented, as well as the redress procedures
The effect of a Chandra-measured merger-related gas component on the lobes of a dead radio galaxy
Creators: name: Worrall, D. M.
name: Birkinshaw, M.
name: Kraft, R. P.
name: Hardcastle, M. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use Chandra data to infer that an X-ray bright component of gas is in the process of separating the radio lobes of 3C 442A. This is the first radio galaxy with convincing evidence that central gas, overpressured with respect to the lobe plasma and not simply a static atmosphere, is having a major dynamical effect on the radio structure. We speculate that the expansion of the gas also re-excites electrons in the lobes of 3C 442A through compression and adiabatic heating. Two features of 3C 442A contribute to its dynamical state. Firstly, the radio source is no longer being powered by a detected active jet, so that the dynamical state of the radio plasma is at the mercy of the ambient medium. Secondly the two early-type galaxies, NGC 7236 and NGC 7237, one of which was the original host of 3C 442A, are undergoing a merger and have already experienced a close encounter, suggesting that the X-ray bright gas is mostly the heated combined galaxy atmospheres. The lobes have been swept apart for about 10^8 yrs by the pressure-driven expansion of the X-ray bright inner gas.
description: 4 pages, 4 figures. Accepted for publication in ApJ Letters
Robust Transport Properties in Graphene
Creators: name: Ziegler, Klaus
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Two-dimensional Dirac fermions are used to discuss quasiparticles in graphene in the presence of impurity scattering. Transport properties are completely dominated by diffusion. This may explain why recent experiments did not find weak localization in graphene. The diffusion coefficient of the quasiparticles decreases strongly with increasing strength of disorder. Using the Kubo formalism, however, we find a robust minimal conductivity that is independent of disorder. This is a consequence of the fact that the change of the diffusion coefficient is fully compensated by a change of the number of delocalized quasiparticle states.
description: 4 pages, 1 figure
Συ-σχεδιασμός υλικού – λογισμικού για ενσωματωμένο σύστημα επεξεργασίας ήχου
Creators: name: Κουσιόπουλος, Γεώργιος-Παναγιώτης Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Συ-σχεδιασμός Υλικού-Λογισμικού
Ενσωματωμένα συστήματα
Επεξεργασία ήχου
Hardware Software co-design
Embedded systems
Sound processing

description: Το θέμα της συγκεκριμένης διπλωματικής εργασίας είναι η υλοποίηση ενός ενσωματωμένου συστήματος επεξεργασίας ήχου. Ως ενσωματωμένο σύστημα θεωρείται ο συνδυασμός ενός κατάλληλου λογισμικού και ενός οποιουδήποτε υπολογιστικού συστήματος (εκτός από τους υπολογιστές γενικού σκοπού), το οποίο αποτελεί τμήμα ενός μεγαλύτερου συστήματος. Στην παρούσα εργασία χρησιμοποιείται η αναπτυξιακή πλακέτα Zedboard, η οποία περιλαμβάνει ένα FPGA (Field Programmable Gate Array) και έναν επεξεργαστή, σε ένα ενιαίο ολοκληρωμένο κύκλωμα, καθώς επίσης και διάφορα περιφερειακά στοιχεία. Το ενσωματωμένο σύστημα αυτής της εργασίας αποτελείται από δύο κύρια μέρη. Το πρώτο μέρος είναι ένα ψηφιακό κύκλωμα το οποίο πραγματοποιεί σύνθεση ήχων από μουσικά όργανα με καθαρά ηλεκτρονικό τρόπο. Το κύκλωμα αυτό υλοποιείται στο FPGA με τη βοήθεια της VHDL (η οποία είναι γλώσσα περιγραφής υλικού). Το δεύτερο μέρος της εργασίας πραγματοποιεί ανάλυση ήχου με τη βοήθεια κατάλληλου κώδικα C++, ο οποίος φορτώνεται στον επεξεργαστή του Zedboard. Συγκεκριμένα, αναλύονται ήχοι από μουσικά όργανα, δηλαδή γίνεται αναγνώριση της νότας που ακούγεται, καθώς και του οργάνου από το οποίο προέρχεται
description: The subject of this MSc thesis is the implementation of a sound processing embedded system. An embedded system is the combination of a proper software and any computational system (except for the general purpose PCs), which is a part of a bigger system. In this thesis a development board, called Zedboard, is used, which contains an FPGA (Field Programmable Gate Array) and a processor, both in a single chip, as well as some peripherals. The embedded system of this project has two main parts. The first part is a digital circuit which synthesizes sounds of musical instruments in a totally electronic way. This circuit is implemented in the FPGA with the use of VHDL (which is a hardware description language). The second part of this project executes sound analysis with the use of a proper C++ code, with which the Zedboard processor is programmed. The exact function of this part of the project is to analyze sounds of musical instruments, that is to identify the note which is heard, as well as the musical instrument which produces this note
The two-loop QCD amplitude gg -> h,H in the Minimal Supersymmetric Standard Model
Creators: name: Anastasiou, Charalampos
name: Beerli, Stefan
name: Daleo, Alejandro
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the two-loop QCD amplitude for the interaction of two gluons and a CP-even Higgs boson in the Minimal Supersymmetric Standard Model. We apply a novel numerical method for the evaluation of Feynman diagrams with infrared, ultraviolet and threshold singularities. We discuss subtleties in the ultraviolet renormalization of the amplitude with conventional dimensional regularization, dimensional reduction, and the four dimensional helicity scheme. Finally, we show numerical results for scenarios of supersymmetry breaking with a rather challenging phenomenology in which the Higgs signal in the MSSM is suppressed in comparison to the Standard Model.
description: 5 pages, 3 figures
Σύμβαση εμπορικής μίσθωσης
Creators: name: Φελεσάκη, Μαρία Αικατερίνη Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Εμπορική μίσθωση
Επαγγελματική μίσθωση
Λύση μίσθωσης
Commercial lease
Business lease
Lease termination

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι η παρουσίαση και ανάλυση της σύμβασης της εμπορικής μίσθωσης. Η σύμβαση της εμπορικής μίσθωσης, η οποία ρυθμίζεται από το προεδρικό διάταγμα 34/1995, αποτελεί μία κατηγορία μίσθωσης, η οποία διακρίνεται για το εύρος και την περιπλοκότητα των διατάξεων που ρυθμίζουν τη λειτουργία της. Ξεκινώντας την ανάλυση της σύμβασης της εμπορικής μίσθωσης, γίνεται αναφορά στα εννοιολογικά στοιχεία αυτής, το νομοθετικό πλαίσιο που τη διέπει και το πεδίο εφαρμογής του προεδρικού διατάγματος 34/1995. Εν συνεχεία, παρουσιάζονται οι επιμέρους ρυθμίσεις που ισχύουν, σχετικά με την κατάρτιση της μισθωτικής σύμβασης, τα συμβαλλόμενα μέρη, τη διάρκεια αυτής, το μίσθωμα και την αναπροσαρμογή του μισθώματος. Τέλος, αναπτύσσονται οι λόγοι λύσης της σύμβασης εμπορικής μίσθωσης, όπως αυτοί προβλέπονται με τις ειδικότερες ρυθμίσεις του προεδρικού διατάγματος 34/1995, αλλά και σύμφωνα με τις διατάξεις του Αστικού Κώδικα
description: The objective of this dissertation is the presentation and analysis of the commercial lease contract. The commercial lease contract, which is regulated by the presidential decree 34/1995, is a lease contract distinguished for the range and complicity of the provisions that regulate its operation. Starting with the analysis of the commercial lease contract, a reference takes place towards the conceptual elements of the lease, the legislative framework that regulates the commercial lease and the application field of the presidential decree 34/1995. Subsequently, a presentation of the individual regulations that apply to the formation of the commercial lease is made, as well as the contracting parts, the duration of the lease, the rental fee and the readjustment of the rental fee. Lastly, an elaboration of the termination reasons of the commercial lease is developed, as these reasons are stated at the specific regulations of the presidential decree 34/1995, including the provisions of the Civil Code
Helix formation in linear achiral dendronized polymers. A computer simulation study
Creators: name: Christopoulos, D. K.
name: Terzis, A. F.
name: Vanakaras, A. G.
name: Photinos, D. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a molecular simulation study of the structure of linear dendronized polymers. We use excluded volume interactions in the context of a generic coarse-grained molecular model whose geometrical parameters are tuned to represent a poly(para-phenylene) backbone with benzyl ether, Frechet type dendrons. We apply Monte Carlo sampling in order to investigate the formation of packing-induced chiral structures along the polymer backbone of these chemically non-chiral systems. We find that helical structures can be formed, usually with defects consisting of domains with reversed helical handedness. Clear signs of helical arrangements of the dendrons begin to appear for dendritic generation g=4, while for g=5 these arrangements dominate and perfect helices can even be observed as equilibrium structures obtained from certain types of starting configurations.
description: 24 pages, 10 figures
Directionality preservation of nuclear recoils in an emulsion detector for directional dark matter search
Creators: name: Alexandrov, A.
name: De Lellis, G.
name: Di Crescenzo, A.
name: Golovatiuk, A.
name: Tioukov, V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Nuclear emulsion is a well-known detector type proposed also for the directional detection of dark matter. In this paper, we study one of the most important properties of direction-sensitive detectors: the preservation by nuclear recoils of the direction of impinging dark matter particles. For nuclear emulsion detectors, it is the first detailed study where a realistic nuclear recoil energy distribution with all possible recoil atom types is exploited. Moreover, for the first time we study the granularity effect on the emulsion detector directional performance. As well as we compare nuclear emulsion with other directional detectors: in terms of direction preservation nuclear emulsion outperforms the other detectors for WIMP masses above 100 GeV/c$^2$.
description: Prepared for submission to JCAP
A search for radio afterglows from gamma-ray bursts with the Australian Square Kilometre Array Pathfinder
Creators: name: Leung, James K.
name: Murphy, Tara
name: Ghirlanda, Giancarlo
name: Kaplan, David L.
name: Lenc, Emil
name: Dobie, Dougal
name: Banfield, Julie
name: Hale, Catherine
name: Hotan, Aidan
name: McConnell, David
name: Moss, Vanessa A.
name: Pritchard, Joshua
name: Raja, Wasim
name: Stewart, Adam J.
name: Whiting, Matthew
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a search for radio afterglows from long gamma-ray bursts using the Australian Square Kilometre Array Pathfinder (ASKAP). Our search used the Rapid ASKAP Continuum Survey, covering the entire celestial sphere south of declination $+41^\circ$, and three epochs of the Variables and Slow Transients Pilot Survey (Phase 1), covering $\sim 5,000$ square degrees per epoch. The observations we used from these surveys spanned a nine-month period from 2019 April 21 to 2020 January 11. We crossmatched radio sources found in these surveys with 779 well-localised (to $\leq 15''$) long gamma-ray bursts occurring after 2004 and determined whether the associations were more likely afterglow- or host-related through the analysis of optical images. In our search, we detected one radio afterglow candidate associated with GRB 171205A, a local low-luminosity gamma-ray burst with a supernova counterpart SN 2017iuk, in an ASKAP observation 511 days post-burst. We confirmed this detection with further observations of the radio afterglow using the Australia Telescope Compact Array at 859 days and 884 days post-burst. Combining this data with archival data from early-time radio observations, we showed the evolution of the radio spectral energy distribution alone could reveal clear signatures of a wind-like circumburst medium for the burst. Finally, we derived semi-analytical estimates for the microphysical shock parameters of the burst: electron power-law index $p = 2.84$, normalised wind-density parameter $A_* = 3$, fractional energy in electrons $ε_{e} = 0.3$, and fractional energy in magnetic fields $ε_{B} = 0.0002$.
description: 18 pages, 7 figures; accepted for publication in MNRAS
Modern Perspectives on Near-Equilibrium Analysis of Turing Systems
Creators: name: Krause, Andrew L.
name: Gaffney, Eamonn A.
name: Maini, Philip K.
name: Klika, Václav
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Physical sciences
subject: FOS: Biological sciences
subject: 92C15 (primary) 35B36, 35K57 (secondary)

description: In the nearly seven decades since the publication of Alan Turing's work on morphogenesis, enormous progress has been made in understanding both the mathematical and biological aspects of his proposed reaction-diffusion theory. Some of these developments were nascent in Turing's paper, and others have been due to new insights from modern mathematical techniques, advances in numerical simulations, and extensive biological experiments. Despite such progress, there are still important gaps between theory and experiment, with many examples of biological patterning where the underlying mechanisms are still unclear. Here we review modern developments in the mathematical theory pioneered by Turing, showing how his approach has been generalized to a range of settings beyond the classical two-species reaction-diffusion framework, including evolving and complex manifolds, systems heterogeneous in space and time, and more general reaction-transport equations. While substantial progress has been made in understanding these more complicated models, there are many remaining challenges that we highlight throughout. We focus on the mathematical theory, and in particular linear stability analysis of `trivial' base states. We emphasise important open questions in developing this theory further, and discuss obstacles in using these techniques to understand biological reality.
description: 21 pages, 6 figures
Correction to: Reductions to simple fusion systems
Creators: name: Oliver, Bob
Publisher: name: arXiv
Year: 2021
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20E25

description: We fill in a gap in the proof of the main theorem in our earlier paper [Ol]. At the same time, we prove a slightly stronger version of the theorem needed for another paper.