cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spin waves throughout the Brillouin zone and magnetic exchange coupling in ferromagnetic metallic manganites La$_{1-x}$Ca$_{x}$MnO$_3$ ($x=0.25,0.30$)
Creators: name: Ye, F.
name: Dai, Pengcheng
name: Fernandez-Baca, J. A.
name: Adroja, D. T.
name: Perring, T. G.
name: Tomioka, Y.
name: Tokura, Y.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using time-of-flight and triple-axis inelastic neutron spectroscopy, we determine spin wave excitations throughout the Brillouin zone for ferromagnetic manganites La$_{1-x}$Ca$_x$MnO$_3$ ($x=0.25,0.3$) in their low temperature metallic states. While spin wave excitations in the long wavelength limit (spin stiffness $D$) have similar values for both compounds, the excitations near the Brillouin zone boundary of La$_{0.7}$Ca$_{0.3}$MnO$_3$ are considerable softened in all symmetry directions compared to that of La$_{0.75}$Ca$_{0.25}$MnO$_3$. A Heisenberg model with the nearest neighbor and the fourth neighbor exchange interactions can describe the overall dispersion curves fairly well. We compare the data with various theoretical models describing the spin excitations of ferromagnetic manganites.
description: to be published in Phys. Rev. B
Learning the optimal Tikhonov regularizer for inverse problems
Creators: name: Alberti, Giovanni S.
name: De Vito, Ernesto
name: Lassas, Matti
name: Ratti, Luca
name: Santacesaria, Matteo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In this work, we consider the linear inverse problem $y=Ax+ε$, where $A\colon X\to Y$ is a known linear operator between the separable Hilbert spaces $X$ and $Y$, $x$ is a random variable in $X$ and $ε$ is a zero-mean random process in $Y$. This setting covers several inverse problems in imaging including denoising, deblurring, and X-ray tomography. Within the classical framework of regularization, we focus on the case where the regularization functional is not given a priori but learned from data. Our first result is a characterization of the optimal generalized Tikhonov regularizer, with respect to the mean squared error. We find that it is completely independent of the forward operator $A$ and depends only on the mean and covariance of $x$. Then, we consider the problem of learning the regularizer from a finite training set in two different frameworks: one supervised, based on samples of both $x$ and $y$, and one unsupervised, based only on samples of $x$. In both cases, we prove generalization bounds, under some weak assumptions on the distribution of $x$ and $ε$, including the case of sub-Gaussian variables. Our bounds hold in infinite-dimensional spaces, thereby showing that finer and finer discretizations do not make this learning problem harder. The results are validated through numerical simulations.
Phase transition in Nowak-Sznajd opinion dynamics
Creators: name: Woloszyn, Maciej
name: Stauffer, Dietrich
name: Kulakowski, Krzysztof
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The Nowak modification of the Sznajd opinion dynamics model on the square lattice assumes that with probabilities beta and gamma the opinions flip due to mass-media advertising from down to up, and vice versa. Besides, with probability alpha the Sznajd rule applies that a neighbour pair agreeing in its two opinions convinces all its six neighbours of that opinion. Our Monte Carlo simulations and mean-field theory find sharp phase transitions in the parameter space.
description: 8 pages draft for Physica A including all figures
Large-scale gauge spectra and pseudoscalar couplings
Creators: name: Giovannini, Massimo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
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: It is shown that the slopes of the superhorizon hypermagnetic spectra produced by the variation of the gauge couplings are practically unaffected by the relative strength of the parity-breaking terms. A new method is proposed for the estimate of the gauge power spectra in the presence of pseudoscalar interactions during inflation. To corroborate the general results, various concrete examples are explicitly analyzed. Since the large-scale gauge spectra also determine the late-time magnetic fields it turns out that the pseudoscalar contributions have little impact on the magnetogenesis requirement. Conversely the parity-breaking terms crucially affect the gyrotropic spectra that may seed, in certain models, the baryon asymmetry of the Universe. In the most interesting regions of the parameter space the modes reentering prior to symmetry breaking lead to a sufficiently large baryon asymmetry while the magnetic power spectra associated with the modes reentering after symmetry breaking may even be of the order of a few hundredths of a nG over typical length scales comparable with the Mpc prior to the collapse of the protogalaxy. From the viewpoint of the effective field theory description of magnetogenesis scenarios these considerations hold generically for the whole class of inflationary models where the inflaton is not constrained by any underlying symmetry.
description: 46 pages, 7 figures; to appear in Phys. Rev. D
Additional file 3 of Clinically accessible neuroimaging predictors of post-stroke neurocognitive disorder: a prospective observational study
Creators: name: Schellhorn, Till
name: Aamodt, Eva Birgitte
name: Lydersen, Stian
name: Aam, Stina
name: Wyller, Torgeir Bruun
name: Saltvedt, Ingvild
name: Beyer, Mona Kristiansen
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 3: Supplemental Table A3. Results from adjusted and full logistic regression analyses with neurocognitive disorder (NCD) as dependent variable.
Self-Supervised VQ-VAE for One-Shot Music Style Transfer
Creators: name: Cífka, Ondřej
name: Ozerov, Alexey
name: Şimşekli, Umut
name: Richard, Gaël
Publisher: name: arXiv
Year: 2021
Subjects: subject: Sound (cs.SD)
subject: Machine Learning (cs.LG)
subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Neural style transfer, allowing to apply the artistic style of one image to another, has become one of the most widely showcased computer vision applications shortly after its introduction. In contrast, related tasks in the music audio domain remained, until recently, largely untackled. While several style conversion methods tailored to musical signals have been proposed, most lack the 'one-shot' capability of classical image style transfer algorithms. On the other hand, the results of existing one-shot audio style transfer methods on musical inputs are not as compelling. In this work, we are specifically interested in the problem of one-shot timbre transfer. We present a novel method for this task, based on an extension of the vector-quantized variational autoencoder (VQ-VAE), along with a simple self-supervised learning strategy designed to obtain disentangled representations of timbre and pitch. We evaluate the method using a set of objective metrics and show that it is able to outperform selected baselines.
description: ICASSP 2021. Website: https://adasp.telecom-paris.fr/s/ss-vq-vae
How to link the ceramics past? Use Linked Open Pots!
Creators: name: Thiery, Florian
name: Mees, Allard W.
Publisher: name: Zenodo
Year: 2021
Subjects: Linked Open Data
Samian Ware

description: Ancient ceramics usually comprise research-domain specific typologies: only on a generic level linkage can be achieved, based on generic potforms or names. This poster will demonstrate semantic relationships of typologies from Samian Ware and Amphoras (i.e. Samian Research, ARS3D, Kerameikos, CEIPAC/ADS) by potters as a main property concept.
Additional file 4 of Clinically accessible neuroimaging predictors of post-stroke neurocognitive disorder: a prospective observational study
Creators: name: Schellhorn, Till
name: Aamodt, Eva Birgitte
name: Lydersen, Stian
name: Aam, Stina
name: Wyller, Torgeir Bruun
name: Saltvedt, Ingvild
name: Beyer, Mona Kristiansen
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 4: Supplement A4. Definitions of clinical diagnoses, MTA, and Fazekas scale.
Using a deep neural network to predict the motion of under-resolved triangular rigid bodies in an incompressible flow
Creators: name: von Wahl, Henry
name: Richter, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider non-spherical rigid body particles in an incompressible fluid in the regime where the particles are too large to assume that they are simply transported with the fluid without back-coupling and where the particles are also too small to make fully resolved direct numerical simulations feasible. Unfitted finite element methods with ghost-penalty stabilisation are well suited to fluid-structure-interaction problems as posed by this setting, due to the flexible and accurate geometry handling and for allowing topology changes in the geometry. In the computationally under resolved setting posed here, accurate computations of the forces by their boundary integral formulation are not viable. Furthermore, analytical laws are not available due to the shape of the particles. However, accurate values of the forces are essential for realistic motion of the particles. To obtain these forces accurately, we train an artificial deep neural network using data from prototypical resolved simulations. This network is then able to predict the force values based on information which can be obtained accurately in an under-resolved setting. As a result, we obtain forces on very coarse and under-resolved meshes which are on average an order of magnitude more accurate compared to the direct boundary-integral computation from the Navier-Stokes solution, leading to solid motion comparable to that obtained on highly resolved meshes that would substantially increase the simulation costs.
Multiparty Quantum Secret Report
Creators: name: Deng, Fu-Guo
name: Li, Xi-Han
name: Li, Chun-Yan
name: Zhou, Ping
name: Liang, Yu-Jie
name: Zhou, Hong-Yu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A multiparty quantum secret report scheme is proposed with quantum encryption. The boss Alice and her $M$ agents first share a sequence of ($M$+1)-particle Greenberger--Horne--Zeilinger (GHZ) states that only Alice knows which state each ($M$+1)-particle quantum system is in. Each agent exploits a controlled-not (CNot) gate to encrypt the travelling particle by using the particle in the GHZ state as the control qubit. The boss Alice decrypts the travelling particle with a CNot gate after performing a $σ_x$ operation on her particle in the GHZ state or not. After the GHZ states (the quantum key) are used up, the parties check whether there is a vicious eavesdropper, say Eve, monitoring the quantum line, by picking out some samples from the GHZ states shared and measure them with two measuring bases. After confirming the security of the quantum key, they use the GHZ states remained repeatedly for next round of quantum communication. This scheme has the advantage of high intrinsic efficiency for qubits and the total efficiency.
description: 4 pages, no figures
Additional file 1 of Electrocardiographic pattern of apparently healthy African adolescent athletes in Nigeria
Creators: name: Sokunbi, Ogochukwu J.
name: Okoromah, Christy A. N.
name: Ekanem N. Ekure
name: Olajide A. Olawale
name: Wuraola S. Eke
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Marine Biology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1.
Deformation Quantization in White Noise Analysis
Creators: name: Leandre, Remi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We define and present an example of a deformation quantization product on a Hida space of test functions endowed with a Wick product.
description: This is a contribution to the Proc. of workshop on Geometric Aspects of Integrable Systems (July 17-19, 2006; Coimbra, Portugal), published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Βελτιστοποίηση της μοντελοποίησης τυχαίας δομής μεταλλικού αφρού με τη χρήση του αλγορίθμου Voronoi σε τρισδιάστατες δομές
Creators: name: Ξανθοπούλου, Μαρία Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Μεταλλικός Αφρός
Αλγόριθμος Voronoi
Σχεδιαστικό λογισμικό Rhinoceros
Metal foam
Voronoi Algorithm
Rhinoceros design software

description: Τα τελευταία χρόνια γίνονται όλο και εντονότερες προσπάθειες για την ανάπτυξη της μοντελοποίησης της γεωμετρικής δομής των αφρών. Ο λόγος για την ένταση της έρευνας αυτής είναι η ύπαρξη της ανάγκης ελέγχου των ιδιοτήτων των πορωδών υλικών, με μη καταστρεπτικές μεθόδους, όπως είναι, για παράδειγμα, η μέθοδος των Πεπερασμένων Στοιχείων. Για την καλύτερη απόδοση των ελέγχων αυτών είναι αναγκαία η βελτιστοποίηση της γεωμετρικής απεικόνισης της πολύπλοκης δομής του αφρού. Στην εργασία αυτή θα γίνει μια προσπάθεια βελτιστοποίησης της αναπαράστασης της ακριβούς γεωμετρίας τυχαίας ακανόνιστης δομής μεταλλικού αφρού χρησιμοποιώντας διαδικασίες ανάπτυξης γεωμετρίας με τη βοήθεια σχεδιαστικών λογισμικών και αλγορίθμων.
description: In recent years, the effort to develop the modeling of the geometrical structure of the foams become more and more intense. The reason for the intensity of this research is the existence of the need to control the porous materials characteristic properties with non-destructive methods such as the finite element method. For better performance of these checks is necessary to optimize the geometric imaging of the complex structure of the foam. In this work will be an attempt to optimize the representation of the exact accidental irregular metal foam structure geometry using geometry development processes with the help of design software and algorithms.
The Anti-Coincidence Detector for the GLAST Large Area Telescope
Creators: name: Moiseev, A. A.
name: Hartman, R. C.
name: Ormes, J. F.
name: Thompson, D. J.
name: Amato, M. J.
name: Johnson, T. E.
name: Segal, K. N.
name: Sheppard, D. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper describes the design, fabrication and testing of the Anti-Coincidence Detector (ACD) for the Gamma-ray Large Area Space Telescope (GLAST) Large Area Telescope (LAT). The ACD is LAT first-level defense against the charged cosmic ray background that outnumbers the gamma rays by 3-5 orders of magnitude. The ACD covers the top and 4 sides of the LAT tracking detector, requiring a total active area of ~8.3 square meters. The ACD detector utilizes plastic scintillator tiles with wave-length shifting fiber readout. In order to suppress self-veto by shower particles at high gamma-ray energies, the ACD is segmented into 89 tiles of different sizes. The overall ACD efficiency for detection of singly charged relativistic particles entering the tracking detector from the top or sides of the LAT exceeds the required 0.9997.
description: 33 pages, 19 figures
ผลสัมฤทธิ์ทางการเรียนของนิสิตที่เข้าศึกษา คณะสหเวชศาสตร์ มหาวิทยาลัยนเรศวร ระดับปริญญาตรี ปีการศึกษา 2552
Creators: name: กาญดา คันศร
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: ผลสัมฤทธิ์ทางการเรียน, รับตรง, แอดมิสชั่นส์

description: 1, 6, วารสารสาระคาม มหาวิทยาลัยมหาสารคาม
Μοντελοποίηση της μηχανικής απόκρισης πορωδών υλικών με χρήση πεπερασμένων στοιχείων
Creators: name: Κατσικάς, Γεώργιος Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Πορώδη υλικά
Μηχανική απόκριση
Μέθοδος Πεπερασμένων Στοιχείων
Porous material
Mechanical response
Finite Element Method

description: Οι μηχανικές ιδιότητες των πορωδών υλικών, είναι δύσκολο να εξεταστούν με την μέθοδο των πεπερασμένων στοιχείων λόγω της περίπλοκης γεωμετρίας τους και συνήθως προσομοιάζονται με απλούστερες γεωμετρίες. Στην παρούσα διπλωματική εργασία, οι εικονικές γεωμετρίες που έχουν αναπτυχθεί, με κελιά 3D Voronoi ως πόρους για τη δημιουργία ρεαλιστικών γεωμετριών αφρού, υποβάλλονται σε συμπίεση στο 10% του μήκους τους. Το υλικό που επιλέχθηκε για τους παραγόμενους αφρούς είναι το αλουμίνιο Α6061-Τ6 ώστε να είναι εφικτή η αξιολόγηση των προσομοιώσεων με πειραματικά αποτελέσματα που ήδη υπάρχουν. Τα αποτελέσματα που ελήφθησαν καθιστούν δυνατή την οπτικοποίηση των πεδίων παραμόρφωσης του αφρού αλουμινίου, επιτρέποντας την πλήρη έρευνα της μηχανικής συμπεριφοράς του.
description: Porous materials due to their complex geometry are difficult to be examined by FEM-based approaches and usually are simulated by simplified geometrical models. In the present thesis, virtual geometries developed with 3D Voronoi cells as resources to create realistic foam geometries, are subjected to compression up to 10% of their length. The material chosen for the produced foams is aluminum A6061-T6 in order to allow the evaluation of simulations with experimental results that already exist. The obtained results allow the visualization of the aluminum foam deformation and stress fields, allowing for a full investigation of its mechanical behavior.
Andersen Filtration and Hard Lefschetz
Creators: name: Soergel, Wolfgang
Publisher: name: arXiv
Year: 2006
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 22E47

description: On the space of homomorphisms from a Verma module to an indecomposable tilting module of the BGG-category O we define a natural filtration following Andersen and establish a formula expressing the dimensions of the filtration steps in terms of coefficients of Kazhdan-Lusztig polynomials.
description: English version of math.RT/0604589, v3 revised translation
Thermodynamics in expanding shell-shaped Bose-Einstein condensates
Creators: name: Rhyno, Brendan
name: Lundblad, Nathan
name: Aveline, David C.
name: Lannert, Courtney
name: Vishveshwara, Smitha
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Inspired by investigations of Bose-Einstein condensates (BECs) produced in the Cold Atom Laboratory (CAL) aboard the International Space Station, we present a study of thermodynamic properties of shell-shaped BECs. Within the context of a spherically symmetric `bubble trap' potential, we study the evolution of the system from small filled spheres to hollow, large, thin shells via the tuning of trap parameters. We analyze the bubble trap spectrum and states, and track the distinct changes in spectra between radial and angular modes across the evolution. This separation of the excitation spectrum provides a basis for quantifying dimensional cross-over to quasi-2D physics at a given temperature. Using the spectral data, for a range of trap parameters, we compute the critical temperature for a fixed number of particles to form a BEC. For a set of initial temperatures, we also evaluate the change in temperature that would occur in adiabatic expansion from small filled sphere to large thin shell were the trap to be dynamically tuned. We show that the system cools during this expansion but that the decrease in critical temperature occurs more rapidly, thus resulting in depletion of any initial condensate. We contrast our spectral methods with standard semiclassical treatments, which we find must be used with caution in the thin-shell limit. With regards to interactions, using energetic considerations and corroborated through Bogoliubov treatments, we demonstrate that they would be less important for thin shells due to reduced density but vortex physics would become more predominant. Finally, we apply our treatments to traps that realistically model CAL experiments and borrow from the thermodynamic insights found in the idealized bubble case during adiabatic expansion.
description: 18 pages, 9 figures
The QWalk Simulator of Quantum Walks
Creators: name: Marquezino, F. L.
name: Portugal, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Software (cs.MS)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Several research groups are giving special attention to quantum walks recently, because this research area have been used with success in the development of new efficient quantum algorithms. A general simulator of quantum walks is very important for the development of this area, since it allows the researchers to focus on the mathematical and physical aspects of the research instead of deviating the efforts to the implementation of specific numerical simulations. In this paper we present QWalk, a quantum walk simulator for one- and two-dimensional lattices. Finite two-dimensional lattices with generic topologies can be used. Decoherence can be simulated by performing measurements or by breaking links of the lattice. We use examples to explain the usage of the software and to show some recent results of the literature that are easily reproduced by the simulator.
description: 21 pages, 11 figures. Accepted in Computer Physics Communications. Simulator can be downloaded from http://qubit.lncc.br/qwalk
The study of active geomagnetic shielding coils system for JUNO
Creators: name: Zhang, G.
name: Songwadhana, J.
name: Lu, H.
name: Yan, Y.
name: Morozov, N.
name: Ning, F.
name: Zhang, P.
name: Yang, C.
name: Khosonthongkee, K.
name: Limphirat, A.
name: Yan, T.
name: Payupol, T.
name: Suwonjandee, N.
name: Asavapibhop, B.
name: Sawangwit, U.
name: Sangka, A.
name: Zhu, Z.
name: Wang, X.
name: Liu, X.
name: Xie, Z.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator (LS) detector for neutrino mass ordering and other neutrino physics research. The detector uses large-size $20$ inches photomultiplier tubes to detect photons from a liquid scintillator. The large PMTs are sensitive and easily affected such that the detection efficiency loses about 60$\%$ under the geomagnetic field intensity ($\sim$500 mG). It has a significantly negative effect on the detector performance, and a compensation system is necessary for geomagnetic field shielding. As permalloys are easily rusted in water, a better way for the geomagnetic shielding is to apply an active compensation coils system. The simulations show that a set of 32 circular coils can meet the experiment requirement. The residual magnetic field is less than 0.05 G in the Central Detector Photomultiplier Tube (CD-PMT) region (38.5-39.5 m in diameter). A prototype coil system with a 1.2 m was built to validate the simulation and the design. The measured data of prototype and simulation results are consistent with each other, and geomagnetic field intensity is effectively reduced by coils, verifying the shielding coils system design for JUNO. This study is expected to provide practical guidance for the PMT magnetic field shielding for future large-scale detector designs.
description: 16 pages, 11 figures
Additional file 1 of A two-component intervention to improve hand hygiene practices and promote alcohol-based hand rub use among people who inject drugs: a mixed-methods evaluation
Creators: name: Mezaache, Salim
name: Laélia Briand-Madrid
name: Rahni, Linda
name: Poireau, Julien
name: Branchu, Fiona
name: Khafil Moudachirou
name: Yourine Wendzinski
name: Carrieri, Patrizia
name: Roux, Perrine
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1: Supplementary Information. Questionnaires used during the study.
Dynamics of Accretion Flows Irradiated by a Quasar
Creators: name: Proga, Daniel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results from axisymmetric time-dependent HD calculations of gas flows which are under the influence of gravity of a black hole in quasars. We assume that the flows are non-rotating and exposed to quasar radiation. We take into account X-ray heating and the radiation force due to electron scattering and spectral lines. To compute the radiation field, we consider a standard accretion disk as a source of UV photons and a spherical central object as a source of X-rays. The gas temperature and ionization state in the flow are calculated self-consistently from the photoionization and heating rate of the central object. We find that for a 10e8 MSUN black hole with an accretion luminosity of 0.6 of the Eddington luminosity the flow settles into a steady state and has two components: (1) an equatorial inflow and (2) a bipolar inflow/outflow with the outflow leaving the system along the disk rotational axis. The inflow is a realization of a Bondi-like accretion flow. The second component is an example of a non-radial accretion flow which becomes an outflow once it is pushed close to the rotational axis where thermal expansion and the radiation pressure accelerate it outward. Our main result is that the existence of the above two flow components is robust to the outer boundary conditions and the geometry and spectral energy distribution of the radiation field. However, the flow properties are not robust. In particular, the outflow power and collimation is higher for the radiation dominated by the UV/disk emission than for the radiation dominated by the X-ray/central engine emission. Our most intriguing result is that a very narrow outflow driven by radiation pressure on lines can carry more energy and mass than a broad outflow driven by thermal expansion.
description: 14 pages, 4 figures, accepted for publication in ApJ
Classifying high-dimensional Gaussian mixtures: Where kernel methods fail and neural networks succeed
Creators: name: Refinetti, Maria
name: Goldt, Sebastian
name: Krzakala, Florent
name: Zdeborová, Lenka
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: A recent series of theoretical works showed that the dynamics of neural networks with a certain initialisation are well-captured by kernel methods. Concurrent empirical work demonstrated that kernel methods can come close to the performance of neural networks on some image classification tasks. These results raise the question of whether neural networks only learn successfully if kernels also learn successfully, despite neural networks being more expressive. Here, we show theoretically that two-layer neural networks (2LNN) with only a few hidden neurons can beat the performance of kernel learning on a simple Gaussian mixture classification task. We study the high-dimensional limit where the number of samples is linearly proportional to the input dimension, and show that while small 2LNN achieve near-optimal performance on this task, lazy training approaches such as random features and kernel methods do not. Our analysis is based on the derivation of a closed set of equations that track the learning dynamics of the 2LNN and thus allow to extract the asymptotic performance of the network as a function of signal-to-noise ratio and other hyperparameters. We finally illustrate how over-parametrising the neural network leads to faster convergence, but does not improve its final performance.
description: The accompanying code for this paper is available at https://github.com/mariaref/rfvs2lnn_GMM_online
Local dynamics and primitive path analysis for a model polymer melt near a surface
Creators: name: Vladkov, Mihail
name: Barrat, J. -L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: By applying local primitive path and Rouse modes analysis we study the chains conformations, local dynamics and viscosity of a model polymer melt in a polymer-wall interface. We establish that the presence of a repulsive wall leads to acceleration of the dynamics both for unentangled and weakly entangled melts and to a depletion in the entanglement density in the wall vicinity. When the surface bears some grafted chains, we show that the melt chains are accelerated in the unentangled regime and slowed down in the entangled regime. By analyzing the primitive paths we attribute the observed slowdown to an increase in the entanglement density in the interfacial layer. The presence of a relatively small density of grafting sites thus leads to improved mechanical properties (reinforcement) and decreases locally the entanglement length even if the surface is repulsive.
Resolving a challenging supersymmetric low-scale seesaw scenario at the ILC
Creators: name: Masias, J.
name: Cerna-Velazco, N.
name: Jones-Perez, J.
name: Porod, W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate a scenario inspired by natural supersymmetry, where neutrino data is explained within a low-scale seesaw scenario. For this the Minimal Supersymmetric Standard Model is extended by adding light right-handed neutrinos and their superpartners, the R-sneutrinos. Moreover, we consider the lightest neutralinos to be Higgsino-like. We first update a previous analysis and assess to which extent does existing LHC data constrain the allowed slepton masses. Here we find scenarios where sleptons with masses as low as 175 GeV are consistent with existing data. However, we also show that the upcoming run will either discover or rule out sleptons with masses of 300 GeV, even for these challenging scenarios. We then take a scenario which is on the borderline of observability of the upcoming LHC run assuming a luminosity of 300 fb$^{-1}$. We demonstrate that a prospective international $e^+ e^-$ linear collider with a center of mass energy of 1 TeV will be able to discover sleptons in scenarios which are difficult for the LHC. Moreover, we also show that a measurement of the spectrum will be possible within 1-3 percent accuracy.
description: 34 pages, 10 figures; v2: accepted for publication
Kitap Tanıtımı: DOĞU DİNLERİ
Creators: name: AZİZE KAPLAN
Publisher: name: Zenodo
Year: 2019
Subjects: Doğu Dinleri, Dinler Tarihi

description: Eser, Türkiye’de araştırması yapılan ve müntesibi, uygulamaları ve ritüelleriyle yaşamaya devam eden, dolayısıyla onlar hakkındaki kaynaklara ulaşımın kolay olduğu dinlerin (Hıristiyanlık ve Yahudilik gibi) aksine farklı akademik sıkıntılar barındıran doğu dinlerini konu edinmesi bakımından dikkate değerdir.
Elicitation notes on possession and noun roots
Creators: name: Kelsey, Loretta
name: Hong, Jisup
name: Lee-Goldman, Russell
name: Piqueras-Brunet, Marta
name: Hinton, Leanne
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: pom

description: 1 PDF file.
Additional file 1 of Urinary epidermal growth factor as a marker for lupus nephritis: clinical, laboratory, and histopathological study
Creators: name: Hefny, Hesham M.
name: Abualfadl, Esam M.
name: Youssef, Emad A. M.
name: Ismail, Mohamed Ali
name: Soliman, Tamer M.
name: Ahmed, Ahmed Roshdi Hamed
name: Abozaid, Hanan S. M.
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Marine Biology
subject: Cancer

description: Additional file 1. Supplementary Tables.
Charge stripe order from antiphase spin spirals in the spin-Fermion model
Creators: name: Neto, Marcello B. Silva
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We revisit the ground state of the spin-Fermion model within a semiclassical approximation. We demonstrate that antiphase spin spirals, or pi-spirals, whose chirality alternates between consecutive rows (or columns) of local moments, have, for sufficiently high carrier concentration, lower energy than the traditional Shraiman and Siggia spirals. Furthermore, pi-spirals give rise to modulated hopping, anisotropic 1D transport, and charge density wave formation. Finally, we discuss the relevance of pi-spirals to the physics of charge stripe formation in cuprates, such as La(2-x)Sr(x)CuO4.
description: 4 pages, 3 figures
Παρασκευή καινοτόμων νανοσωματιδίων απλού και υπερδιηθημένου κρόκου με χιτοζάνη, εφαρμογή τους σε γαλακτώματα και μελέτη των ιδιοτήτων τους
Creators: name: Ντοχογιάν, Σόνια Βαρντάν
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Γαλακτώματα
Κρόκος
Χιτοζάνη
Cosmetic emulsions
Crocus Sativus L.
Chitosan

description: Αντικείμενο της παρούσας διπλωματικής εργασίας είναι η σύνθεση νανοσωματιδίων χιτοζάνης με κρόκο και η χρήση τους σε γαλακτώματα. Για τον σκοπό αυτό, παρασκευάστηκαν νανοσωματίδια χιτοζάνης με κρόκο και με υπερδιηθημένο κρόκο. Για την παραπάνω διεργασία χρησιμοποιήθηκε η μέθοδος της ιονοτροπικής πηκτωματοποίησης. Η επιτυχής σύνθεση των υλικών, τα μορφολογικά τους χαρακτηριστικά και οι ιδιότητές τους προσδιορίστηκαν με: φασματοσκοπία υπερύθρου (FTIR), κρυσταλλογραφία ακτίνων-x (XRD), θερμοσταθμική ανάλυση (TGA), ηλεκτρονική μικροσκόπια σάρωσης(SEM) και δυναμική σκέδαση φωτός(DLS). Ακολούθησε η παρασκευή των γαλακτωμάτων, με τη χρήση των νανοσωματιδίων, και η μελέτη της σταθερότητάς τους. Στην προσπάθεια αυτή μελετήθηκαν το ιξώδες, το pH, η αντηλιακή ιδιότητα (SPF) και η αντιμικροβιακή δράση των γαλακτωμάτων.
description: The aim of the present work is the composition of chitosan nanoparticles with Crocus sativus L. and their use in emulsions. For this purpose, were synthesized chitosan nanoparticles with Crocus sativus L. and ultrafiltered Crocus sativus L..Ionic gelation has been used as the appropriate method for synthesizing chitosan nanoparticles. Successful composition of materials, their morphological characteristics and properties have been evaluated via Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), Thermogravimetric analysis (TGA), Scanning electron microscopy (SEM) and Dynamic light scattering (DLS). Afterwards emulsions were prepared by using all the nanoparticles and have been investigated for their thermal as well as color stability. More precisely, have been accomplished measurements about their viscosity, pH and antibacterial properties. In a further step, emulsions were evaluated along with their ultraviolet radiation protection ability in terms of sun protection factor (SPF).
ระบบการประเมินภาระงานของบุคลากรคณะวิทยาศาสตร์ออนไลน์
Creators: name: เกรียงไกร นามพุทธา
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: ระบบประเมิน, ภาระงาน, ไคลเอ็นท์, เซิร์ฟเวอร์

description: 1, 6, วารสารสาระคาม มหาวิทยาลัยมหาสารคาม
Remote Renewable Hubs For Carbon-Neutral Synthetic Fuel Production
Creators: name: Berger, Mathias
name: Radu, David
name: Detienne, Ghislain
name: Deschuyteneer, Thierry
name: Richel, Aurore
name: Ernst, Damien
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper studies the economics of carbon-neutral synthetic fuel production from renewable electricity in remote areas where high-quality renewable resources are abundant. To this end, a graph-based optimisation modelling framework directly applicable to the strategic planning of remote renewable energy supply chains is proposed. More precisely, a hypergraph abstraction of planning problems is introduced, wherein nodes can be viewed as optimisation subproblems with their own parameters, variables, constraints and local objective. Nodes typically represent a subsystem such as a technology, a plant or a process. Hyperedges, on the other hand, express the connectivity between subsystems. The framework is leveraged to study the economics of carbon-neutral synthetic methane production from solar and wind energy in North Africa and its delivery to Northwestern European markets. The full supply chain is modelled in an integrated fashion, which makes it possible to accurately capture the interaction between various technologies on an hourly time scale. Results suggest that the cost of synthetic methane production and delivery would be slightly under 150 EUR/MWh (higher heating value) by 2030 for a system supplying 10 TWh annually and relying on a combination of solar photovoltaic and wind power plants, assuming a uniform weighted average cost of capital of 7%. A comprehensive sensitivity analysis is also carried out in order to assess the impact of various techno-economic parameters and assumptions on synthetic methane cost, including the availability of wind power plants, the investment costs of electrolysis, methanation and direct air capture plants, their operational flexibility, the energy consumption of direct air capture plants, and financing costs.
Quarkonium correlators and spectral functions at zero and finite temperature
Creators: name: Jakovac, A.
name: Petreczky, P.
name: Petrov, K.
name: Velytsky, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study quarkonium correlators and spectral functions at zero and finite temperature using the anisotropic Fermilab lattice formulation with anisotropy xi=2 and 4. To control cutoff effects we use several different lattice spacings. The spectral functions were extracted from lattice correlators with Maximum Entropy Method based on a new algorithm. We find evidence for the survival of 1S quarkonium states in the deconfined medium till relatively high temperatures as well as for dissolution of 1P quarkonium states right above the deconfinement temperature.
description: 22 pages, 31 figures, uses revtex style
การพัฒนางานประจำสู่งานวิจัย
Creators: name: ประสาท เนืองเฉลิม
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: วิจัยงานประจำ, ปัญหาการวิจัย, วิจัยเพื่อพัฒนางาน, วิจัยสถาบัน

description: 1, 6, วารสารสาระคาม มหาวิทยาลัยมหาสารคาม
Density-density functionals and effective potentials in many-body electronic structure calculations
Creators: name: Reboredo, F. A.
name: Kent, P. R. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We demonstrate the existence of different density-density functionals designed to retain selected properties of the many-body ground state in a non-interacting solution starting from the standard density functional theory ground state. We focus on diffusion quantum Monte Carlo applications that require trial wave functions with optimal Fermion nodes. The theory is extensible and can be used to understand current practices in several electronic structure methods within a generalized density functional framework. The theory justifies and stimulates the search of optimal empirical density functionals and effective potentials for accurate calculations of the properties of real materials, but also cautions on the limits of their applicability. The concepts are tested and validated with a near-analytic model.
description: five figures
A comparative study of Jet-quenching Schemes
Creators: name: Majumder, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The four major approximation schemes devised to study the modification of jets in dense matter are outlined. The comparisons are restricted to basic assumptions and approximations made in each case and the calculation methodology used. Emergent underlying similarities between apparently disparate methods brought about by the approximation schemes are exposed. Parameterizations of the medium in each scheme are discussed in terms of the transport coefficient $\hat{q}$. Discrepancies between the estimates obtained from the four schemes are discussed. Recent developments in the basic theory and phenomenology of energy loss are highlighted.
description: 12 pages, 10 figures, latex, plenary presentation at the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (QM2006), Shanghai, China Nov. 14-20, 2006
Additional file 1 of Sleep disorders in rare genetic syndromes: a meta-analysis of prevalence and profile
Creators: name: Agar, Georgie
name: Brown, Chloe
name: Sutherland, Daniel
name: Coulborn, Sean
name: Oliver, Chris
name: Richards, Caroline
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Hematology

description: Additional file 1. Number of exclusions at Title and Abstract Screening.
Longitudinal-Transverse Separations of Structure Functions at Low $Q^{2}$ for Hydrogen and Deuterium
Creators: name: Tvaskis, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report on a study of the longitudinal to transverse cross section ratio, $R=σ_L/σ_T$, at low values of $x$ and $Q^{2}$, as determined from inclusive inelastic electron-hydrogen and electron-deuterium scattering data from Jefferson Lab Hall C spanning the four-momentum transfer range 0.06 $ < Q^{2} < 2.8$ GeV$^{2}$. Even at the lowest values of $Q^{2}$, $R$ remains nearly constant and does not disappear with decreasing $Q^{2}$, as expected. We find a nearly identical behaviour for hydrogen and deuterium.
description: 4 pages, 2 gigures
สภาพปัญหาและอุปสรรคการปฏิบัติงานของระบบงบประมาณ พัสดุ การเงินและบัญชี โดยเกณฑ์พึงรับ-พึงจ่าย ลักษณะ 3 มิติ
Creators: name: เพ็ญศรี ชื่นชม
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: ระบบงบประมาณ พัสดุ การเงินและบัญชี เกณฑ์พึงรับ-พึงจ่าย 3 มิติ, สภาพปัญหาและอุปสรรคการปฏิบัติงาน

description: 1, 6, วารสารสาระคาม มหาวิทยาลัยมหาสารคาม
The HI content of E+A galaxies
Creators: name: Buyle, P.
name: Michielsen, D.
name: De Rijcke, S.
name: Pisano, D. J.
name: Dejonghe, H.
name: Freeman, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present deep single-dish HI observations of a sample of six nearby E+A galaxies (0.05
description: Accepted for publication in ApJ, 9 pages, 3 figures (reduced in resolution)
Twin Pati-Salam theory of flavour with a TeV scale vector leptoquark
Creators: name: King, Stephen F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a twin Pati-Salam (PS) theory of flavour broken to the $G_{4321}$ gauge group at high energies, then to the Standard Model at low energies, yielding a TeV scale vector leptoquark $U^μ_1(3,1,2/3)$ which has been suggested to address the lepton universality anomalies $R_{K^{(*)}}$ and $R_{D^{(*)}}$ in $B$ decays. Quark and lepton masses are mediated by vector-like fermions, with personal Higgs doublets for the second and third families, which may be replaced by a two Higgs doublet model (2HDM). The twin PS theory of flavour successfully accounts for all quark and lepton (including neutrino) masses and mixings, and predicts a dominant coupling of $U^μ_1(3,1,2/3)$ to the third family left-handed doublets. However the predicted mass matrices, assuming natural values of the parameters, are not consistent with the single vector leptoquark solution to the $R_{D^{(*)}}$ anomaly, given its current value.
description: Version published in JHEP