cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Davydov Splitting, Resonance Effect and Phonon Dynamics in CVD grown Layered MoS2
Creators: name: Kumar, Deepu
name: Singh, Birender
name: Kumar, Rahul
name: Kumar, Mahesh
name: Kumar, Pradeep
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a comprehensive temperature dependent Raman measurements for horizontally aligned CVD grown layered MoS2 in a temperature range of 4 to 330 K under resonance condition. Our analysis of temperature dependent phonon frequency shift and linewidth suggest a finite role of three and four phonon anharmonic effect. We observed Davydov splitting of the out-of-plane (A1g ) and in-plane (E12g ) modes, attributed to the weak interlayer interaction, and reflected in the appearance of additional modes with decreasing temperature for both 3 layers and few layers system. We also observed that the number of Davydov splitting components are more in few layers as compared to 3L MoS2, suggesting it increases with increasing number of layers. Temperature evaluation of the Raman spectra shows that the Davydov splitting, especially for A1g mode, is very strong and well resolved at low temperature. We note that A1g mode shows splitting at low temperature, while E12g mode is splitted even at room temperature, and that suggests to prominent role of A1g mode to the interlayer interaction. Further, the temperature dependence tuning of resonance effect is observed, via almost sixty fold increase in the intensity of the phonon modes at low temperature.
Anonymous Quantum Conference Key Agreement
Creators: name: Hahn, Frederik
name: de Jong, Jarn
name: Pappa, Anna
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Conference Key Agreement (CKA) is a cryptographic effort of multiple parties to establish a shared secret key. In future quantum networks, generating secret keys in an anonymous way is of tremendous importance for parties that want to keep their shared key secret and at the same time protect their own identity. We provide a definition of anonymity for general protocols and present a CKA protocol that is provably anonymous under realistic adversarial scenarios. We base our protocol on shared Greenberger-Horne-Zeilinger states, which have been proposed as more efficient resources for CKA protocols, compared to bipartite entangled resources. The existence of secure and anonymous protocols based on multipartite entangled states provides a new insight on their potential as resources and paves the way for further applications.
description: 11 pages, 4 figures. This is an extended version containing detailed proofs of the protocols in arXiv:2007.07995
Deterministic Random Number Generator Attack against the Kirchhoff-Law-Johnson-Noise Secure Key Exchange Protocol
Creators: name: Chamon, Christiana
name: Ferdous, Shahriar
name: Kish, Laszlo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: This paper demonstrates the vulnerability of the Kirchhoff-Law-Johnson-Noise (KLJN) secure key exchanger to compromised random number generator(s) even if these random numbers are used solely to generate the noises emulating the Johnson noise of Alice's and Bob's resistors. The attacks shown are deterministic in the sense that Eve's knowledge of Alice's and/or Bob's random numbers is basically deterministic. Moreover, no statistical evaluation is needed, except for rarely occurring events of negligible, random waiting time and verification time. We explore two situations. In the first case, Eve knows both Alice's and Bob's random noises. We show that, in this situation, Eve can quickly crack the secure key bit by using Ohm's Law. In the other situation, Eve knows only Bob's random noise. Then Eve first can learn Bob's resistance value by using Ohm's Law. Therefore, she will have the same knowledge as Bob, thus at the end of the bit exchange period, she will know Alice's bit.
description: arXiv admin note: substantial text overlap with arXiv:2005.10429
Cross Sections for the $γp \to K^{*0}Σ^+$ Reaction at $E_γ= 1.7 - 3.0$ GeV
Creators: name: Hleiqawi, I.
name: Hicks, K.
name: Carman, D.
name: Mibe, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Differential cross sections for the reaction $γp \to K^{*0} Σ^+$ are presented at nine bins in photon energy in the range from 1.7 to 3.0 GeV. The \kstar was detected by its decay products, $K^+π^-$, in the CLAS detector at Jefferson Lab. These data are the first \kstar photoproduction cross sections ever published over a broad range of angles. Comparison with a theoretical model based on the vector and tensor $K^*$-quark couplings shows good agreement with the data in general, after adjusting the model's two parameters in a fit to our data. Disagreement between the data at forward angles and the global angle-energy fit to the model suggests that the role of scalar $κ$ meson exchange in $t$-channel diagrams should be investigated.
description: 7 pages, 5 figures, submitted to Phys. Rev. C (Rapid Commun.)
Nonlocal vortex motion in mesoscopic amorphous Nb0.7Ge0.3 structures
Creators: name: Helzel, A.
name: Kokanovic, I.
name: Babic, D.
name: Litvin, L. V.
name: Rohlfing, F.
name: Otto, F.
name: Surgers, C.
name: Strunk, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study nonlocal vortex transport in mesoscopic amorphous Nb0.7Ge0.3 samples. A dc current I is passed through a wire connected via a perpendicular channel, of a length L= 2-5 um, with a pair of voltage probes where a nonlocal response Vnl ~ I is measured. The maximum of Rnl=Vnl/I for a given temperature occurs at an L-independent magnetic field and is proportional to 1/L. The results are interpreted in terms of the dissipative vortex motion along the channel driven by a remote current, and can be understood in terms of a simple model.
description: 4 pages, 3 figures
A Geometric Framework for Pitch Estimation on Acoustic Musical Signals
Creators: name: Goodman, Tom
name: van Gemst, Karoline
name: Tino, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Sound (cs.SD)
subject: Computational Geometry (cs.CG)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 68R01

description: This paper presents a geometric approach to pitch estimation (PE)-an important problem in Music Information Retrieval (MIR), and a precursor to a variety of other problems in the field. Though there exist a number of highly-accurate methods, both mono-pitch estimation and multi-pitch estimation (particularly with unspecified polyphonic timbre) prove computationally and conceptually challenging. A number of current techniques, whilst incredibly effective, are not targeted towards eliciting the underlying mathematical structures that underpin the complex musical patterns exhibited by acoustic musical signals. Tackling the approach from both a theoretical and experimental perspective, we present a novel framework, a basis for further work in the area, and results that (whilst not state of the art) demonstrate relative efficacy. The framework presented in this paper opens up a completely new way to tackle PE problems, and may have uses both in traditional analytical approaches, as well as in the emerging machine learning (ML) methods that currently dominate the literature.
Η αναπαράσταση της αναπηρίας στα εικονογραφημένα παιδικά βιβλία
Creators: name: Ντόβα, Δήμητρα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: αναπηρία
εικονογραφημένα παιδικά βιβλία
παιδική λογοτεχνία
disability
children’s picture books
children’s literature

description: Η ανάγνωση και εξέταση των εικονογραφημένων παιδικών βιβλίων, με αποδέκτες κυρίως παιδιά ηλικίας 3- 10 ετών, έχει ως σκοπό να διερευνήσει πώς παρουσιάζεται η αναπαράσταση της πολιτισμικής ταυτότητας της αναπηρίας. Τα εικονογραφημένα παιδικά βιβλία περιλαμβάνουν δύο διαφορετικούς κώδικες, το λεκτικό και τον εικονικό, και μέσω της αναλυτικής συσχέτισης τους με το ερευνητικό εργαλείο της ποιοτικής ανάλυσης περιεχομένου, θα αναδειχθεί πώς σχετίζονται και πώς πραγματεύονται το θέμα της αναπηρίας. Το υλικό της έρευνας αποτελούν συγκεκριμένα δώδεκα (12) εικονογραφημένα παιδικά βιβλία που κυκλοφόρησαν στην Ελλάδα μετά το 1991, και η επιλογή τους έχει ως στόχο να απαντηθούν ερευνητικά ερωτήματα που αφορούν στο πως τελικά αναπαριστάνεται η αναπηρία στα εικονογραφημένα παιδικά βιβλία.
description: The reading and examination of children's picture books, which mainly targeted 3 to 10 years old children, aims to explore the representation of cultural identity disability. The children's picture books include two different codes, the verbal and the illustrated, and through analytical correlation with the research tool of qualitative content analysis, will highlight how they are related and how they deal with the issue of disability. The research material is specifically in twelve (12) children's picture books that were released in Greece after 1991, and their selection is designed to answer research questions related to how disability is finally represented in picture books for children.
Self-Assembly of Patchy Particles into Polymer Chains: A Parameter-Free Comparison between Wertheim Theory and Monte Carlo Simulation
Creators: name: Sciortino, F.
name: Bianchi, E.
name: Douglas, J. F.
name: Tartaglia, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We numerically study a simple fluid composed of particles having a hard-core repulsion, complemented by two short-ranged attractive (sticky) spots at the particle poles, which provides a simple model for equilibrium polymerization of linear chains. The simplicity of the model allows for a close comparison, with no fitting parameters, between simulations and theoretical predictions based on the Wertheim perturbation theory, a unique framework for the analytic prediction of the properties of self-assembling particle systems in terms of molecular parameter and liquid state correlation functions. This theory has not been subjected to stringent tests against simulation data for ordering across the polymerization transition. We numerically determine many of the thermodynamic properties governing this basic form of self-assembly (energy per particle, order parameter or average fraction of particles in the associated state, average chain length, chain length distribution, average end-to-end distance of the chains, and the static structure factor) and find that predictions of the Wertheim theory accord remarkably well with the simulation results.
Dirac Fermion kinetics in three-dimensionally curved graphene
Creators: name: Tanabe, Yoichi
name: Ito, Yoshikazu
name: Sugawara, Katsuaki
name: Koshino, Mikito
name: Kimura, Shojiro
name: Naito, Tomoya
name: Johnson, Isaac
name: Takahashi, Takashi
name: Chen, Mingwei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Three dimensionally curved graphene with a wide range of curvature radii from 25 nm to 1000 nm demonstrates that nano-scale curvature is a new degree of freedom to tune the transport properties of graphene by manipulating 2D electron kinetics on 3D curved surfaces.
Arsenic speciation in algae
Creators: name: Lai, Vivian Wai-Man
Publisher: name: University of British Columbia
Year: 2009

description: Arsenic speciation in a variety of commercial algal products and a brown alga, Fucus gardneri, collected in Vancouver, B.C., was carried out by using high performance liquid chromatography-inductively coupled plasma-mass spectrometry (HPLC-ICP-MS)and hydride generation atomic absorption spectrometry (HGAAS). Water-soluble organoarsenic compounds present in commercially available food products made from red algae, brown algae and blue-green algae were analyzed by using HPLC-ICP-MS. By the application of two HPLC columns and two mobile phase conditions, arsenosugars (arsenoribofuranosides) in a variety of algae were identified by comparing the retention times with the organoarsenic compounds previously identified in an oyster tissue standard reference material, NIST 1566a. A commercial brown algal product, kelp powder, was found to contain four different arsenosugars. This product may have potential as a "standard reference material" for identification purposes. A terrestrial blue-green alga, Nostoc commune var flagelliforme, was also analyzed and found to contain an arsenosugar, a compound which was previously known only in marine organisms. The total arsenic content as well as the amounts of water-soluble arsenic compounds in all commercial products were determined by using a continuous flow HGAAS system. Commercial marine algae were found to contain high amounts of total arsenic, from 7.6 μg g⁻¹ to 49.3 μg g⁻¹. The terrestrial product was found to contain only 2.7 μg g⁻¹ of total arsenic.
Generation of high-fidelity controlled-not logic gates by coupled superconducting qubits
Creators: name: Galiautdinov, Andrei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Building on the previous results of the Weyl chamber steering method, we demonstrate how to generate high-fidelity controlled-not by direct application of certain, physically relevant Hamiltonians with fixed coupling constants containing Rabi terms. Such Hamiltonians are often used to describe two superconducting qubits driven by local rf-pulses. It is found that in order to achieve 100% fidelity in a system with capacitive coupling of strength g one Rabi term suffices. We give the exact values of the physical parameters needed to implement such CNOT. The gate time and all possible Rabi frequencies are found to be t=pi/(2g) and Omega_1/g = sqrt(64n^2-1), n=1,2,3,... . Generation of a perfect CNOT in a system with inductive coupling, characterized by additional constant k, requires the presence of both Rabi terms. The gate time is again t = pi/(2g), but now there is an infinite number of solutions, each of which is valid in a certain range of k and is characterized by a pair of positive integers (n,m). We distinguish two cases, depending on the sign of the coupling constant: (1) the antiferromagnetic case (k>=0); (2) the ferromagnetic case (k<=0). The paper concludes with consideration of fidelity degradation by switching to resonance. Simulation of time-evolution based on the 4th order Magnus expansion reveals characteristics of the gate similar to those found in the exact case, with slightly shorter gate time and shifted values of Rabi frequencies.
description: 14 pages, 1 figure (select PostScript to view); minor corrections; added Appendix: Derivation of the Hamiltonian for inductively coupled flux qubits
Mathematical modelling of nonlinear internal ring waves in three-layered fluids
Creators: name: Alharthi, Noura
Publisher: name: Loughborough University
Year: 2021
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Oceanic internal waves generated in straits, river-sea interaction zones, and by interaction with localised topographic features often look on satellite images as a part of a ring. We study long weakly-nonlinear mode-I and mode-II internal ring waves in a three-layered fluid in the presence of a parallel linear current (i.e. a shear flow with constant vorticity), distorting the wavefronts. Previous research has shown that there exists a linear modal decomposition in the far-field set of Euler equations describing the waves, which is used to describe the wavefronts and modal structure of these internalring waves, and to obtain an appropriate weakly-nonlinear model for the amplitudes of the waves. The curvilinear wavefronts of waves in cylindrical geometry are described bythe singular solution of a nonlinear first-order differential equation. We show that there are significant differences in the shapes of the wavefronts of mode-I and mode-II internalwaves propagating over the same linear shear current: the wavefront of the mode-I wave is elongated in the direction of the current, while the wavefront of the mode-II wave issqueezed in this direction. In addition, we use a finite-difference scheme to solve the derived cKdV-type amplitude equation numerically. Numerical results are obtained formode-I and mode-II internal ring waves generated by a localised source and initially propagating in the absence of a current. We assume that a part of the ring wave then starts propagating over the linear shear current, and our modelling within the scope of the cKdV-type equation can be applied to describe the behaviour of the relevant part of the ring wave. Numerical modelling confirms the analytical predictions concerning the shape of the wavefronts, and reveals very strong dispersive effects in the upstream direction.
Liquid-vapor transition from a microscopic theory: Beyond the Maxwell construction
Creators: name: Parola, Alberto
name: Pini, Davide
name: Reatto, Luciano
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A smooth cut-off formulation of the Hierarchical Reference Theory (HRT) is developed and applied to a Yukawa fluid. The HRT equations are derived and numerically solved leading to: the expected renormalization group structure in the critical region, non classical critical exponents and scaling laws, a convex free energy in the whole phase diagram (including the two-phase region), finite compressibility at coexistence, together with a fully satisfactory comparison with available numerical simulations. This theory, which also guarantees the correct short range behavior of two body correlations, represents a major improvement over the existing liquid state theories.
description: 4 pages, 5 figures
Temperature dependence of the mean magnon collision time in a spin Seebeck device
Creators: name: Basso, Vittorio
name: Sola, Alessandro
name: Ansalone, Patrizio
name: Kuepferling, Michaela
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Based on the relaxation time approximation, the mean collision time for magnon scattering $τ_c(T)$ is computed from the experimental spin Seebeck coefficient of a bulk YIG / Pt bilayer. The scattering results to be composed by two processes: the low temperature one, with a $T^{-1/2}$ dependence, is attributed to the scattering by defects and provides a mean free path around 10 $μ$m; the high temperature one, depending on $T^{-4}$, is associated to the scattering by other magnons. The results are employed to predict the thickness dependence of the spin Seebeck coefficient for thin films.
description: 13 pages, 4 figures, presented at JEMS 2020, submitted to J.Magn. Magn. Mater
The VLT-FLAMES Survey of Massive Stars: Observations centered on the Magellanic Cloud clusters NGC 330, NGC 346, NGC 2004, and the N11 region
Creators: name: Evans, C. J.
name: Lennon, D. J.
name: Smartt, S. J.
name: Trundle, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new observations of 470 stars using the Fibre Large Array Multi-Element Spectrograph (FLAMES) instrument in fields centered on the clusters NGC 330 and NGC 346 in the Small Magellanic Cloud (SMC), and NGC 2004 and the N11 region in the Large Magellanic Cloud (LMC). A further 14 stars were observed in the N11 and NGC 330 fields using the Ultraviolet and Visual Echelle Spectrograph (UVES) for a separate programme. Spectral classifications and stellar radial velocities are given for each target, with careful attention to checks for binarity. In particular we have investigated previously unexplored regions around the central LH9/LH10 complex of N11, finding ~25 new O-type stars from our spectroscopy. We have observed a relatively large number of Be-type stars that display permitted Fe II emission lines. These are primarily not in the cluster cores and appear to be associated with classical Be-type stars, rather than pre main-sequence objects. The presence of the Fe II emission, as compared to the equivalent width of H$α$, is not obviously dependent on metallicity. We have also explored the relative fraction of Be- to normal B-type stars in the field-regions near to NGC 330 and NGC 2004, finding no strong evidence of a trend with metallicity when compared to Galactic results. A consequence of service observations is that we have reasonable time-sampling in three of our FLAMES fields. We find lower limits to the binary fraction of O- and early B-type stars of 23 to 36%. One of our targets (NGC346-013) is especially interesting with a massive, apparently hotter, less luminous secondary component.
description: 35 pages, 17 figures (some reduced in size). Replacement copy, includes an erratum on the final page. A copy with full res. & embedded figures is at http://www.roe.ac.uk/~cje/flamesMC.ps.gz
Dyakonov-Perel spin relaxation near metal-insulator transition and in hopping transport
Creators: name: Shklovskii, B. I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: In a heavily doped semiconductor with weak spin-orbital interaction the Dyakonov-Perel spin relaxation rate is known to be proportional to the Drude conductivity. We argue that in the case of weak spin-orbital interaction this proportionality goes beyond the Drude mechanism: it stays valid through the metal-insulator transition and in the range of the exponentially small hopping conductivity.
description: 3 pages
God Damn the Bicentennial: A Patriotic Essay by John Gardner
Creators: name: Lu, David
Publisher: name: University of Rochester
Year: 2024
Subjects: classificationCode: 43
subject: History, heritage and archaeology
classificationCode: 430321
subject: North American history
classificationCode: 470307
subject: English language

description: Students in two of Professor Robert Westbrook's courses in American intellectual history, "The American Mind, 1600-1865" (History 267) and "The American Mind, 1865-1990" (History 268), use manuscript materials as part of a research assignment. This assignment, called "Other People's Mail," requires that students transcribe a document and write an introduction to it, placing the document in its context and suggesting the ways in which it bears on significant themes in the course.

Please Note: All rights regarding the papers rest with the authors. The images of the manuscripts may not be reproduced without obtaining prior written permission from the Department of Rare Books and Special Collections.
This document was adapted from a webpage hosted on the Rare Books, Special Collections, and Manuscripts website, before being converted into a static document and uploaded to URRR on 2024-10-07.
title: Struktura budynku niemal zeroenergetycznego (etap III)
Creators: name: Rosolski, Sławomir
Publisher: name: Publishing House of Poznan University of Technology
Year: 2021

description: Zeszyty Naukowe Politechniki Poznańskiej. Architektura, Urbanistyka, Architektura wnętrz, 5, 5-15
Strong first order electroweak phase transition in 2HDM confronting future Z & Higgs factories
Creators: name: Su, Wei
name: Williams, Anthony G.
name: Zhang, Mengchao
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The electroweak phase transition can be made first order by extending the Standard Model (SM) Higgs sector with extra scalars. The same new physics can explain the matter-antimatter asymmetry of the universe by supplying an extra source of CP violation and sphaleron processes. In this paper we study the existence of a strong first order electroweak phase transition (SFOEWPT) in the type-I and type-II two Higgs doublet models (2HDM). We focus on how the SFOEWPT requirement constraints the spectrum of non-SM Higgs. Through a parameter space scan, we find that SFOEWPT suggests upper limits on the masses of heavy Higgs $m_{A/H/H^\pm}$, which is less than 1 TeV. High temperature expansion and Higgs vacuum uplifting is used for an analytical understanding of our results. We also study the probe ability on SFOEWPT from Higgs and $Z$-pole precision measurements at the one-loop level at future Higgs & $Z$ factories. And together with theoretical constraints, sizeable loop corrections require $m_A \approx m_{H^\pm} > m_H$ to meet SFOEWPT condition in Type-II 2HDM.
description: 26+12 pages, 10 figures
Inflation, Reheating and Dark Matter
Creators: name: Cardenas, Victor H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In a recent paper, Liddle and Urena-Lopez suggested that to have a unified model of inflation and dark matter is imperative to have a proper reheating process where part of the inflaton field remains. In this paper I propose a model where this is possible. I found that, incorporating the effect of plasma masses generated by the inflaton products, enable us to stop the process. A numerical estimated model is presented.
description: 4 pages, 1 figure
Heavy quark jet quenching with collisional plus radiative energy loss and path length fluctuations
Creators: name: Wicks, Simon
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: With the QGP opacity computed perturbatively and with the global entropy constraints imposed by the observed $dN_{ch}/dy\approx1000$, radiative energy loss alone cannot account for the observed suppression of single non-photonic electrons. We show that collisional energy loss, which previously has been neglected, is comparable to radiative loss for both light and heavy jets and may in fact be the dominant mechanism for bottom quarks. Predictions taking into account both radiative and collisional losses significantly reduce the discrepancy with data. In addition to elastic energy loss, it is critical to include jet path length fluctuations to account for the observed pion suppression.
description: To appear in the proceedings of 2nd International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (Hard Probes 2006), Asilomar, Pacific Grove, California, 9-16 Jun 2006
Quantum confinement in $α$-Grushin planes
Creators: name: Pozzoli, Eugenio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider here a family of singular Laplace-Beltrami operators, focussing our attention on the problem of so-called quantum confinement on the half-plane equipped with Riemannian metrics of Grushin type degenerate at the boundary. By introducing a costant-fiber direct integral scheme we are able to rigorously characterize the presence or absence of self-adjointness of these operators. We also compare our technique and results with the already studied problem of quantum confinement on the half-cylinder.
Upper Esophageal Sphincter Opening Segmentation with Convolutional Recurrent Neural Networks in High Resolution Cervical Auscultation
Creators: name: Khalifa, Yassin
name: Donohue, Cara
name: Coyle, James L.
name: Sejdić, Ervin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Upper esophageal sphincter is an important anatomical landmark of the swallowing process commonly observed through the kinematic analysis of radiographic examinations that are vulnerable to subjectivity and clinical feasibility issues. Acting as the doorway of esophagus, upper esophageal sphincter allows the transition of ingested materials from pharyngeal into esophageal stages of swallowing and a reduced duration of opening can lead to penetration/aspiration and/or pharyngeal residue. Therefore, in this study we consider a non-invasive high resolution cervical auscultation-based screening tool to approximate the human ratings of upper esophageal sphincter opening and closure. Swallows were collected from 116 patients and a deep neural network was trained to produce a mask that demarcates the duration of upper esophageal sphincter opening. The proposed method achieved more than 90\% accuracy and similar values of sensitivity and specificity when compared to human ratings even when tested over swallows from an independent clinical experiment. Moreover, the predicted opening and closure moments surprisingly fell within an inter-human comparable error of their human rated counterparts which demonstrates the clinical significance of high resolution cervical auscultation in replacing ionizing radiation-based evaluation of swallowing kinematics.
Single-Photon Atomic Cooling
Creators: name: Price, Gabriel N.
name: Bannerman, S. Travis
name: Viering, Kirsten
name: Narevicius, Edvardas
name: Raizen, Mark G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report the cooling of an atomic ensemble with light, where each atom scatters only a single photon on average. This is a general method that does not require a cycling transition and can be applied to atoms or molecules which are magnetically trapped. We discuss the application of this new approach to the cooling of hydrogenic atoms for the purpose of precision spectroscopy and fundamental tests.
description: 4 pages and 3 figures
Parallel Weighted Random Sampling
Creators: name: Hübschle-Schneider, Lorenz
name: Sanders, Peter
Publisher: name: Karlsruhe
Year: 2019
Subjects: categorical distribution
multinoulli distribution
parallel algorithm
alias method
PRAM
communication efficient algorithm
subset sampling
reservoir sampling

description: Data structures for efficient sampling from a set of weighted items are an important building block of many applications. However, few parallel solutions are known. We close many of these gaps both for shared-memory and distributed-memory machines. We give efficient, fast, and practicable algorithms for sampling single items, k items with/without replacement, permutations, subsets, and reservoirs. We also give improved sequential algorithms for alias table construction and for sampling with replacement. Experiments on shared-memory parallel machines with up to 158 threads show near linear speedups both for construction and queries.
Domain of attraction of the quasi-stationary distributions for the Ornstein-Uhlenbeck process
Creators: name: Lladser, Manuel
name: Martin, Jaime San
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60H10; 65C30

description: Let $X=(X_t)$ be a one-dimensional Ornstein-Uhlenbeck process with an initial density function $f$ supported on the positive real-line that is a regularly varying function with exponent $-(1+η)$, with $η\in (0,1)$. We prove the existence of a probability measure $ν$ with a Lebesgue density, depending on $η$, such that for every Borel set $A$ of the positive real-line: $\lim_{t\to\infty} P_f(X_t\in A | T_0^X>t)=ν(A)$, where $T_0^X$ is the hitting time of 0 of $X$.
description: 11 pages
Two dimensional non-Hermitian harmonic oscillator: coherent states
Creators: name: Izadparast, Masoumeh
name: Mazharimousavi, S. Habib
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this study, we introduce a two dimensional complex harmonic oscillator potential with space and time reflection symmetries. The corresponding time independent Schrödinger equation yields real eigenvalues with complex eigenfunctions. We also construct the coherent state of the system by using a superposition of 12 eigenfunctions. Using the complex correspondence principle for the probability density we investigate the possible modifications in the probability densities due to the non-Hermitian aspect of the Hamiltonian.
description: 11 pages and 5 figures
Microscopic evolution of doped Mott insulators from polaronic metal to Fermi liquid
Creators: name: Koepsell, Joannis
name: Bourgund, Dominik
name: Sompet, Pimonpan
name: Hirthe, Sarah
name: Bohrdt, Annabelle
name: Wang, Yao
name: Grusdt, Fabian
name: Demler, Eugene
name: Salomon, Guillaume
name: Gross, Christian
name: Bloch, Immanuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The competition between antiferromagnetism and hole motion in two-dimensional Mott insulators lies at the heart of a doping-dependent transition from an anomalous metal to a conventional Fermi liquid. Condensed matter experiments suggest charge carriers change their nature within this crossover, but a complete understanding remains elusive. We observe such a crossover in Fermi-Hubbard systems on a cold-atom quantum simulator and reveal the transformation of multi-point correlations between spins and holes upon increasing doping at temperatures around the superexchange energy. Conventional observables, such as spin susceptibility, are furthermore computed from the microscopic snapshots of the system. Starting from a magnetic polaron regime, we find the system evolves into a Fermi liquid featuring incommensurate magnetic fluctuations and fundamentally altered correlations. The crossover is completed for hole dopings around $30\%$. Our work benchmarks theoretical approaches and discusses possible connections to lower temperature phenomena.
O₂-oxidations catalyzed by trans-dioxoporphyrinatoruthenium(VI) species
Creators: name: Cheng, Stephen Yau Sang
Publisher: name: University of British Columbia
Year: 2009

description: Some trans-Ru[sup VI](porp)(0)2 complexes [porp = TMP (1), TDCPP (2), TDCPP-Cl₈ (3)] were synthesized and used to oxidize, both stoichiometrically and (in the presence of air/O₂) catalytically, a variety of organic compounds in benzene under relatively mild conditions. [Chemical Compound Diagram followed by complex abstract. See pp. 3-6 of the accompanying pdf].
The gamma-N -> Delta transition in chiral effective-field theory
Creators: name: Pascalutsa, Vladimir
name: Vanderhaeghen, Marc
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We describe the pion electroproduction processes in the $Δ$(1232)-resonance region within the framework of chiral effective-field theory. By studying the observables of pion electroproduction in a next-to-leading order calculation we are able to make predictions and draw conclusions on the properties of the $N\to Δ$ electromagnetic form factors.
description: 9 pages, 7 figures; prepared for the proceedings of "Shapes of Hadrons" workshop, Athens, Greece, 25-30 April 2006
Modeling an adiabatic quantum computer
Creators: name: Zagoskin, A. M.
name: Savel'ev, S.
name: Nori, Franco
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We map adiabatic quantum evolution on the classical Hamiltonian dynamics of a 1D gas (Pechukas gas) and simulate the latter numerically. This approach turns out to be both insightful and numerically efficient, as seen from our example of a CNOT gate simulation. For a general class of Hamiltonians we show that the escape probability from the initial state scales no faster than |\dotλ|^γ, where |\dotλ| is the adiabaticity parameter. The scaling exponent for the escape probability is γ= 1/2 for all levels, except the edge (bottom and top) ones, where γ
description: 8 pages 2 figures
Fractional two-branes, toric orbifolds and the quantum McKay correspondence
Creators: name: Ezhuthachan, Bobby
name: Govindarajan, Suresh
name: Jayaraman, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We systematically study and obtain the large-volume analogues of fractional two-branes on resolutions of orbifolds C^3/Z_n. We study a generalisation of the McKay correspondence proposed in hep-th/0504164 called the quantum McKay correspondence by constructing duals to the fractional two-branes. Details are explicitly worked out for two examples -- the crepant resolutions of C^3/Z_3 and C^3/Z_5.
description: 34 pages, 2 figures, LaTeX (JHEP3 style); (v2) typos corrected; (v3) sec 3 reorganised
Chemical analysis of early-type stars with planets
Creators: name: Saffe, C.
name: Miquelarena, P.
name: Alacoria, J.
name: Flores, M.
name: Arancibia, M. Jaque
name: Calvo, D.
name: Girardi, G. Martín
name: Grosso, M.
name: Collado, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Aims. To explore the chemical pattern of early-type stars with planets, searching for a possible signature of planet formation. In particular, we study a likely relation between the lambda Bootis chemical pattern and the presence of giant planets. Methods. We performed a detailed abundance determination in a sample of early-type stars with and without planets via spectral synthesis. Results. We compared the chemical pattern of the stars in our sample (13 stars with planets and 24 stars without detected planets) with those of lambda Bootis and other chemically peculiar stars. We have found four lambda Bootis stars in our sample, two of which present planets and circumstellar disks (HR 8799 and HD 169142) and one without planets detected (HD 110058). We have also identified the first lambda Bootis star orbited by a brown dwarf (zeta Del). This interesting pair lambda Bootis star + brown dwarf could help to test stellar formation scenarios. We found no unique chemical pattern for the group of early-type stars bearing giant planets. However, our results support, in principle, a suggested scenario in which giant planets orbiting pre-main-sequence stars possibly block the dust of the disk and result in a lambda Bootis-like pattern. On the other hand, we do not find a lambda Bootis pattern in different hot-Jupiter planet host stars, which do not support the idea of possible accretion from the winds of hot-Jupiters, recently proposed in the literature. Then, other mechanisms should account for the presence of the lambda Bootis pattern between main-sequence stars. Finally, we suggest that the formation of planets around lambda Bootis stars such as HR 8799 and HD 169142 is also possible through the core accretion process and not only gravitational instability [abridged]
description: 21 pages, 12 figures, 4 tables, A&A accepted
Τεχνολογία Λογισμικού για Κινητές Εφαρμογές:
Creators: name: Παπαδοπούλου, Ιωάννα Χαραλάμπους
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Επαναχρησιμοποίηση Κώδικα
Συστατικό Λογισμικού
Κινητές Εφαρμογές
Reusability
Software Component
Mobile Applications

description: Η παρούσα εργασία εστιάζει στη χρήση Επαναχρησιμοποιήσιμων Συστατικών Λογισμικού για την ανάπτυξη εφαρμογών που αφορούν κινητές συσκευές. Στόχος της είναι η δημιουργία ενός Αποθετηρίου αποτελούμενου από επαναχρησιμοποιήσιμα Συστατικά Λογισμικού προκειμένου να διευκολυνθεί η ανάπτυξη εφαρμογών για κινητές συσκευές. Τα Συστατικά Λογισμικού τα οποία περιγράφονται, προήλθαν από έργα Ανοικτού Κώδικα, και από το Διαδίκτυο. Η μεθοδολογία η οποία ακολουθήθηκε στηρίζεται στην «Ανάπτυξη με βάση τα Συστατικά Λογισμικού». Συστατικά Λογισμικού, ονομάζονται όλα τα «στοιχεία» ενός έργου ή μιας εφαρμογής τα οποία μπορούν να επαναχρησιμοποιηθούν ως έχουν, σε νέα έργα ή εφαρμογές.
description: This paper introduces the importance of using Reusable Components in developing Mobile Applications and aims to provide a Repository of such Components that developers will be able to use. The advantages of using such a methodology are many and the most important are that it simplifies the process of developing an Application and that it reduces the development time. The Components described in this paper came from OSS (Open Source Software) projects and from the Web. The main idea for developing the following methodology is based on “Component-based Development”. Components are called all the pre-existing “elements” in a Project or Application, which can be re-used as they are, without any modifications, by other developers in their Projects or Applications.
Nonlocality, Bell's Ansatz and Probability
Creators: name: Kracklauer, A. F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum Mechanics lacks an intuitive interpretation, which is the cause of a generally formalistic approach to its use. This in turn has led to a certain insensitivity to the actual meaning of many words used in its description and interpretation. Herein, we analyze carefully the possible mathematical meanings of those terms used in analysis of EPR's contention, that Quantum Mechanics is incomplete, as well as Bell's work descendant therefrom. As a result, many inconsistencies and errors in contemporary discussions of nonlocality, as well as in Bell's Ansatz with respect to the laws of probability, are identified. Evading these errors precludes serious conflicts between Quantum Mechanics and both Special Relativity and Philosophy.
description: 8&1/2 pages revtex; v2: many corrections, clairifications & extentions, all small; v3: editorial scrub
Further investigations on the use of Camphor as an Enantiopure starting material in natural product synthesis
Creators: name: Wong, Michael Kay Chung
Publisher: name: University of British Columbia
Year: 2009

description: The use of (-)-camphor (ent-9) as an enantiopure intermediate in pseudoguaianolide and limonoid synthesis and further aspects of the chemistry df 4-methylcamphor (87) are presented in this thesis. First, the preparation of relay compounds ketal-enone 140, hydroxy-ketone 123, hydroxy-enone 158, and hydroxy-ketone 128 represents a formal, enantiospecific synthesis of the helenanolides carpesiolin (96), helenalin (95), bigelovin (97), mexicanin I (98), and linifolin A (99) and the ambrosanolides damsin (102) and confertin (103). (-)-Camphor (ent-9) was converted in nine steps to ketal-ester 164b. Stereoselective alkylation of 164b with methyl iodide yielded ketal-ester 165 that could be elaborated to the ketal-enone 140 in seven steps. Hydroxy-ketone 123 was obtained from 140 in a further three steps. Similarly, stereoselective alkylation of 164b with allyl bromide yielded ketal-ester 184 that could be converted subsequently to hydroxy-enone 158 in nine steps. Finally, catalytic hydrogenation of 158 provided hydroxy-ketone 128. Secondly, as part of an enantiospecific synthetic approach to the limonoids, the tricyclic enone 257 was prepared. (-)-Camphor (ent-9) was converted to the known bicyclic enone-ester (ent-255) in ten steps. Alkylation of ketal-ester .262, derived from ent-255, with methyl bromoacetate yielded ketal-diester 263, which could be transformed into dimethoxy-enone 267 in three steps. Two successive alkylations of enone 267 yielded the j3,^unsaturated enone 279, and subsequent desilylation, oxidation, and aldol condensation steps provided the tricyclic enone 257, which has potential as a BCD-intermediate for the synthesis of tetracyclic limonoids. Finally, a proposed mechanism for the bromination of endo-3-bromo-4-methylcamphor (327) to yield e«do-3,9-dibromo-4-(bromomethyl)camphor (332) was evaluated using the corresponding deuterium-labelled analogue, e«do-3-bromo-9-deuterio-4-(deuteriomethyl)camphor (351), as substrate. NMR spectroscopic evidence was used to identify the product resulting from the bromination of 351 as g«rfo-3,9-dibromo-9-deuterio-4-(bromodeuteriomethyl)camphor (352). Evidence supporting the proposed existence of unsaturated intermediates 355 and 358 in the bromination mechanism was also obtained.
Adolescence, sex education and purity culture : a qualitative exploration of women’s health perceptions
Creators: name: Laboy, Madison R.
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Sex education
Adolescence
Purity culture
Sexual health
Sexual socialization

description: Background: Purity culture is a religious movement that promotes abstinence only sex education, traditional gender roles and emphasizes virginity until marriage. Adolescents growing up in purity culture do not receive comprehensive sex education, however, still often experience sexual socialization through peers and the media. Sex education is important for equipping adolescents with knowledge and safe sex practices necessary for healthy sexual behaviors. Comprehensive sex education has been shown to reduce risk for sexually transmitted diseases, teen pregnancy, and intimate partner violence. In the United States, most adolescents are not receiving comprehensive sex education programs. This study explored the perceptions of women who grew up in purity culture and their experiences with sex education. Methods: This study was a secondary analysis of a nationwide mix-method study investigating purity culture and shame. In-depth qualitative interviews were conducted with 27 cis-gender women who had grown up or experienced purity culture. Participants were recruited through targeted emails, flyers, social media, and university organizations. Interviews were analyzed for themes ground in Sociocultural theory. Results: There were 3 major themes identified among participant interviews: (1) lack of trusted sources of sex education during adolescence, (2) sexual socialization during adolescence, and (3) the role of sexual education influence on sexual health outcomes. Additionally, majority of women reported self-education regarding sex education in adulthood. Conclusion: Women who grew up in purity culture experienced sexual socialization during adolescence but lacked sex education from parents and schools. Sex education for women in purity culture reinforced traditional gender roles and abstinence which may have contributed to some women’s experiences of abuse. Many women experienced adverse sexual health outcomes which they attributed to their lack of sex education. Ensuring adolescents receive quality sex education is vitally important particularly for groups, such as purity culture, that discourage sex education at home and in schools.