cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dyson Maps and Unitary Evolution for Maxwell Equations in Tensor Dielectric Media
Creators: name: Koukoutsis, Efstratios
name: Hizanidis, Kyriakos
name: Ram, Abhay K.
name: Vahala, George
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A reformulation of Maxwell equations for an inhomogeneous, anisotropic, passive and non-dispersive medium results in a quantum-like Dirac equation that admits unitary time evolution. In contrast to other approaches, there is no a-priori introduction of the Riemann-Silberstein-Weber (RSW) vector but the Maxwell equations are considered in their standard fields, with given constitutive relations. From the electromagnetic conservation quantities a pseudo-Hermitian dynamics is found together with a Dyson map that recovers the full Hermicity of the dynamics in an extended Hilbert space that describes the physical notion of unitary evolution. As an example, a uniaxial tensor dielectric medium is considered, with the explicit Dyson map yielding an optimal representation in a set of generalized RSW vectors. In this newly discovered form, a Quantum Computing (QC) implementation for simulation of electromagnetic wave propagation in complex media can be made, with further extension into plasmas.
description: 12 pages, 5 figures
Restricted phase space thermodynamics of Einstein-power-Yang-Mills AdS black hole
Creators: name: Du, Yun-Zhi
name: Li, Huai-Fan
name: Zhang, Yang
name: Zhou, Xiang-Nan
name: Zhao, Jun-Xin
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the thermodynamics of the Einstein-Power-Yang-Mills AdS black holes in the context of the gauge-gravity duality. Under this framework, the Newton's gravitational constant and the cosmological constant are varied in the system. We rewrite the thermodynamical first law in a more extended form containing both the pressure and the central charge of the dual conformal field theory, i.e., the restricted phase transition formula. A novel phenomena arises: the dual quantity of pressure is the effective volume, not the geometric one. That is leading to a new behavior of the Van de Waals-like phase transition for this system with the fixed central charge: the supercritical phase transition. From the Ehrenfest's scheme perspective, we check out the second-order phase transition of the EPYM AdS black hole. Furthermore the effect of non-linear Yang-Mills parameter on these thermodynamical properties is also investigated.
Is KR Cygni a Triple Star System?
Creators: name: Sipahi, Esin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: New multi-color UBVR light curves of the eclipsing binary KR Cyg were obtained in 2005. Photometric solutions were derived using the Wilson- Devinney method. The result shows that KR Cyg is a near-contact binary system with a large effective temperature difference between the components, approximately 5230 K. All the times of minimum light were collected and combined with our observations obtained in 2010 and 2011. Analysing all the times of mid-eclipse, we found for the first time a possible periodic oscillation with an amplitude of 0.001 days and a period of ~76 years. The periodic oscillation could be explained by the light-time effect due to a presumed third component.
description: 19 pages, 6 figures
Optofluidic adaptive optics in multi-photon microscopy
Creators: name: Sohmen, Maximilian
name: Muñoz-Bolaños, Juan D.
name: Rajaeipour, Pouya
name: Ritsch-Marte, Monika
name: Ataman, Çağlar
name: Jesacher, Alexander
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Adaptive optics in combination with multi-photon techniques is a powerful approach to image deep into a specimen. Remarkably, virtually all adaptive optics schemes today rely on wavefront modulators which are reflective, diffractive, or both. This, however, can pose a severe limitation for applications. Here, we present a fast and robust sensorless adaptive optics scheme adapted for transmissive wavefront modulators. We study our scheme in numerical simulations and in experiments with a novel, optofluidic wavefront shaping device which is transmissive, refractive, polarisation-independent and broadband. We demonstrate scatter correction of two-photon-excited fluorescence images of microbeads as well as brain cells and benchmark our device against a liquid-crystal spatial light modulator. Our method and technology could open new routes for adaptive optics in scenarios where previously the restriction to reflective and diffractive devices may have staggered innovation and progress.
Detection of long-range orbital-Hall torques
Creators: name: Bose, Arnab
name: Kammerbauer, Fabian
name: Gupta, Rahul
name: Go, Dongwook
name: Mokrousov, Yuriy
name: Jakob, Gerhard
name: Klaeui, Mathias
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report and quantify a large orbital-Hall torque generated by Nb and Ru, which we identify from a strong dependence of torques on the ferromagnets. This is manifested as a sign reversal and strong enhancement in the damping-like torques measured in Nb (or Ru)/Ni bilayers as compared to Nb (or Ru)/FeCoB bilayers. The long-range nature of orbital transport in the ferromagnet is revealed by the thickness dependences of Ni in Nb (or Ru)/Ni bilayers which are markedly different from the regular spin absorption in the ferromagnet that takes place within a few angstroms and thus it uniquely distinguishes the orbital Hall torque from the spin Hall torque.
On the bifurcation theory of the Ginzburg-Landau equations
Creators: name: Nagy, Ákos
name: Oliveira, Gonçalo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35Q56, 53C07, 58E15, 58J55

description: We construct nonminimal and irreducible solutions to the Ginzburg-Landau equations on closed manifolds of arbitrary dimension with trivial first real cohomology. Our method uses bifurcation theory where the "bifurcation points" are characterized by the eigenvalues of a Laplace-type operator. To our knowledge these are the first such examples on nontrivial line bundles.
description: 15 pages, no figures, accepted version, comments are welcome! To appear in the Proceedings of the AMS. arXiv admin note: text overlap with arXiv:2103.05613
Generalized Unique Reconstruction from Substrings
Creators: name: Yehezkeally, Yonatan
name: Bar-Lev, Daniella
name: Marcovich, Sagi
name: Yaakobi, Eitan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper introduces a new family of reconstruction codes which is motivated by applications in DNA data storage and sequencing. In such applications, DNA strands are sequenced by reading some subset of their substrings. While previous works considered two extreme cases in which all substrings of pre-defined lengths are read or substrings are read with no overlap for the single string case, this work studies two extensions of this paradigm. The first extension considers the setup in which consecutive substrings are read with some given minimum overlap. First, an upper bound is provided on the attainable rates of codes that guarantee unique reconstruction. Then, efficient constructions of codes that asymptotically meet that upper bound are presented. In the second extension, we study the setup where multiple strings are reconstructed together. Given the number of strings and their length, we first derive a lower bound on the read substrings' length $\ell$ that is necessary for the existence of multi-strand reconstruction codes with non-vanishing rates. We then present two constructions of such codes and show that their rates approach 1 for values of $\ell$ that asymptotically behave like the lower bound.
description: Author-submitted, peer-reviewed and accepted version (IEEE Trans. on Inform. Theory). arXiv admin note: text overlap with arXiv:2205.03933
The VMC survey III. Mass-loss rates and luminosities of LMC AGB stars
Creators: name: Gullieuszik, M.
name: Groenewegen, M. A. T.
name: Cioni, M. -R. L.
name: de Grijs, R.
name: van Loon, J. Th.
name: Girardi, L.
name: Ivanov, V. D.
name: Oliveira, J. M.
name: Emerson, J. P.
name: Guandalini, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Dust radiative transfer models are presented for all 374 AGB stars candidates in one of the fields observed by the new VISTA survey of the Magellanic Clouds (VMC). Mass-loss rates, luminosities and a classification of C- and O-rich stars are derived by fitting the models to the spectral energy distribution obtained by combining VMC data with existing optical, near-, and mid-infrared photometry. This exploratory study shows that our method provides reliable mass-loss rates, luminosities and chemical classifications for all AGB stars. These results offer already important constraints to AGB evolutionary models. Most of our conclusions, especially for the rarer dust-enshrouded extreme AGB stars, are however strongly limited by the relatively small area covered by our study. Forthcoming VMC observations will easily remove this limitation. [abridged]
description: 12 pages, 10 figures. Accepted for publication in A&A
title: What Can Earnings Calls Tell Us About the Output Gap and Inflation in Canada?
Creators: name: Gosselin, Marc-André
name: Taskin, Temel
Publisher: name: Bank of Canada
Year: 2023

description: We construct new indicators of the imbalance between demand and supply for the Canadian economy by using natural language processing techniques to analyze earnings calls of publicly listed firms. The results show that the text-based indicators are highly correlated with official inflation data and estimates of the output gap and improve the accuracy of inflation forecasts. This suggests that these indicators could help central banks foresee inflationary pressures in the economy. Our examination of other topics in earnings calls, such as supply chain disruptions and capacity constraints, points to the potential benefits of using textual data to quickly draw insights on a range of relevant topics. We conclude that text-based measures of economic slack should be included in central banks’ monitoring and forecasting toolkits.
description: Nous élaborons de nouveaux indicateurs de déséquilibre entre la demande et l’offre dans l’économie canadienne au moyen de techniques de traitement automatique du langage naturel pour analyser les transcriptions de présentations des résultats financiers de sociétés cotées en bourse. Les résultats de l’étude montrent que les indicateurs fondés sur des données textuelles présentent une forte corrélation avec les données officielles sur l’inflation et les estimations de l’écart de production, et améliorent l’exactitude des prévisions d’inflation. Cela laisse entendre que ces indicateurs pourraient aider les banques centrales à prévoir les pressions inflationnistes dans l’économie. Notre examen d’autres sujets mentionnés lors des présentations des résultats financiers, tels que les perturbations des chaînes d’approvisionnement et les contraintes de capacité, indique des avantages possibles de l’utilisation de données textuelles pour tirer rapidement des conclusions sur divers sujets pertinents. Nous concluons que les mesures de capacités excédentaires basées sur des données textuelles devraient être ajoutées aux outils de suivi et de prévision des banques centrales.
Topological Effects on Non-Relativistic Eigenvalue Solutions Under AB-Flux Field with Pseudoharmonic- and Mie-type Potentials
Creators: name: Ahmed, Faizuddin
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we investigate the quantum dynamics of a non-relativistic particle confined by the Aharonov-Bohm quantum flux field with pseudoharmonic-type potential in the background of topological defect produced by a point-like global monopole. We solve the radial Schrödinger equation analytically and determine the exact eigenvalue solution of the quantum system. Afterwards, we consider a Mie-type potential in the quantum system and solve the radial equation analytically and obtain the eigenvalue solution. We analyze the effects of the topological defect and the quantum flux with these potentials on the energy eigenvalue and wave function of the non-relativistic particles. In fact, it is shown that the energy levels and wave functions are influenced by the topological defect shifted the result compared to the flat space results. In addition, the quantum flux field also shifted the eigenvalue solutions and an analogue of the Aharonov-Bohm effect for bound-states is observed. Finally, we utilize these eigenvalue solutions to some known diatomic molecular potential models and presented the energy eigenvalue and wave function
description: 25 pages, 6 figures, overall presentations improved, accepted for publication in Communications in Theoretical Physics (https://doi.org/10.1088/1572-9494/acccdc)
Search for Radiative Decays of Cosmic Background Neutrino using Cosmic Infrared Background Energy Spectrum
Creators: name: Kim, Shin-Hong
name: Takemasa, Ken-ichi
name: Takeuchi, Yuji
name: Matsuura, Shuji
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We propose to search for the neutrino radiative decay by fitting a photon energy spectrum of the cosmic infrared background to a sum of the photon energy spectrum from the neutrino radiative decay and a continuum. By comparing the present cosmic infrared background energy spectrum observed by AKARI and Spitzer to the photon energy spectrum expected from neutrino radiative decay with a maximum likelihood method, we obatined a lifetime lower limit of $3.1 \times 10^{12}$ to $3.8 \times 10^{12}$ years at 95% confidence level for the third generation neutrino $ν_3$ in the $ν_3$ mass range between 50 \mmev and 150 \mmev under the present constraints by the neutrino oscillation measurements. In the left-right symmetric model, the minimum lifetime of $ν_3$ is predicted to be $1.5 \times 10^{17}$ years for $m_3$ of 50 \mmev. We studied the feasibility of the observation of the neutrino radiative decay with a lifetime of $1.5 \times 10^{17}$ years, by measuring a continuous energy spectrum of the cosmic infrared background.
Vacuum-dual static perfect fluid obeying $p=-(n-3)ρ/(n+1)$ in $n(\ge 4)$ dimensions
Creators: name: Maeda, Hideki
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We obtain the general $n(\ge 4)$-dimensional static solution with an $(n-2)$-dimensional Einstein base manifold for a perfect fluid obeying a linear equation of state $p=-(n-3)ρ/(n+1)$. It is a generalization of Semiz's four-dimensional general solution with spherical symmetry and consists of two different classes. Through the Buchdahl transformation, the class-I and class-II solutions are dual to the topological Schwarzschild-Tangherlini-(A)dS solution and one of the $Λ$-vacuum direct-product solutions, respectively. While the metric of the spherically symmetric class-I solution is $C^\infty$ at the Killing horizon for $n=4$ and $5$, it is $C^1$ for $n\ge 6$ and then the Killing horizon turns to be a parallelly propagated curvature singularity. For $n=4$ and $5$, the spherically symmetric class-I solution can be attached to the Schwarzschild-Tangherlini vacuum black hole with the same value of the mass parameter at the Killing horizon in a regular manner, namely without a lightlike massive thin-shell. This construction allows new configurations of an asymptotically (locally) flat black hole to emerge. If a static perfect fluid hovers outside a vacuum black hole, its energy density is negative. In contrast, if the dynamical region inside the event horizon of a vacuum black hole is replaced by the class-I solution, the corresponding matter field is an anisotropic fluid and may satisfy the null and strong energy conditions. While the latter configuration always involves a spacelike singularity inside the horizon for $n=4$, it becomes a non-singular black hole of the big-bounce type for $n=5$ if the ADM mass is larger than a critical value.
description: 32 pages, 3 figures, 5 tables; v2, published version in Classical and Quantum Gravity
NAFLD & AC_Appendix_20210902.docx
Creators: name: Liao, Minqi
name: Gao, Xuping
name: Cui, Feng-Yun
name: Tan, Si-xian
name: Lou, Yan-mei
name: Wang, Chang-yi
name: Xu, Shan
name: Peng, Xiao-lin
name: Dai, Shu-hong
name: Zhao, Dan
name: Wang, Li
name: Ping, Zhao
name: Feng, Pin-ning
name: Zeng, Fang-fang
Publisher: name: figshare
Year: 2021
Subjects: subject: 111706 Epidemiology
subject: FOS: Health sciences
subject: 110104 Medical Biochemistry: Lipids
subject: FOS: Clinical medicine
subject: 111716 Preventive Medicine
subject: 110201 Cardiology (incl. Cardiovascular Diseases)
subject: 111717 Primary Health Care

description: The supplementary material of the manuscript titled "Non-alcoholic fatty liver disease associated with aortic calcification: a cohort study with propensity score matching" .
Critical and non-critical coherence lengths in a two-band superconductor
Creators: name: Örd, Teet
name: Rägo, Küllike
name: Vargunin, Artjom
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the peculiarities of coherency in a two-gap superconductor. The both intraband couplings, inducing superconductivity in the independent bands, and interband pair-transfer interaction have been taken into account. On the basis of the Ginzburg-Landau equations derived from the Bogoliubov-de Gennes equations and the relevant self-consistency conditions for a two-gap system, we find critical and non-critical coherence lengths in the spatial behaviour of the fluctuations of order parameters. The character of the temperature dependencies of these length scales is determined by the relative contributions from intra- and interband interaction channels.
description: Accepted for publication in Journal of Superconductivity and Novel Magnetism
Berezinskii-Kosterlitz-Thouless phase transition with Rabi-coupled bosons
Creators: name: Furutani, Koichiro
name: Perali, Andrea
name: Salasnich, Luca
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We theoretically investigate the superfluid-normal-state Berezinskii-Kosterlitz-Thouless transition in a binary mixture of bosonic atoms with Rabi coupling under balanced densities. We find the nonmonotonic behavior of the transition temperature with respect to the intercomponent coupling and amplification of the transition temperature for finite values of Rabi coupling, but for small intracomponent couplings. We develop the Nelson-Kosterlitz renormalization-group equations in the two-component Bose mixture and obtain the Nelson-Kosterlitz criterion modified by a fractional parameter, which is responsible for half-integer vortices, and by Rabi coupling. Adopting the renormalization-group approach, we clarify the dependence of the Berezinskii-Kosterlitz-Thouless transition temperature on the Rabi coupling and the intercomponent coupling. Analysis of the first and second sound velocities also reveals the suppression of quasicrossing of the two sound modes with a finite Rabi coupling in the low-temperature regime. Our results for a two-dimensional binary Bose superfluid contribute to the understanding of a broad range of multicomponent quantum systems such as two-dimensional multiband superconductors.
description: 8+4 pages, 3+1 figures; published version
Nurses' Medication Work: The Social Organization of Rule Breaking to Keep Patients Safe
Creators: name: Dyjur, Louise
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Nursing
subject: FOS: Health sciences
subject: Medication Work
subject: Nursing Work
subject: Institutional Ethnography

description: Patient safety has emerged as one of the most important and widely accepted aims of contemporary health care organizations. Medication errors are common and pose potentially serious threats to the safety of patients. Consequently, initiatives to improve patient safety often target nurses’ work with medications. A plethora of research studies examine medication errors and contribute to dominant formulations that impose stringent rules thought to enhance medication safety. However, little literature has examined the materiality of medication work and few research studies are oriented to the knowledge practices of nurses. This study used an institutional ethnographic approach, grounded in nurses’ everyday experiences, to contribute a different way of knowing about medication work. The study findings revealed a disquieting disjuncture between theoretical accounts of medication work and the actual everyday practices of nurses working with medications. Nurses routinely use their professional judgment and discretion to adapt stringent rules in order to keep patients safe and accomplish medication work effectively. However necessary and sensible it may be, nursing work that does not adhere to standard practice and institutional policy may be perceived as “breaking the rules”. Rule breaking is risky for nurses, as their professional competence is scrutinized and evaluated through regulatory and theoretical frameworks that value adherence to rules as the only way to demonstrate safety. The core argument developed in this analysis is that discretion is an essential element of competent medication practice, and that framing discretionary work within a rule based discourse obscures the safety work that nurses are routinely and regularly engaged in.
XML content warehousing: Improving sociological studies of mailing lists and web data
Creators: name: Nguyen, Benjamin
name: Vion, Antoine
name: Dudouet, François-Xavier
name: Colazzo, Dario
name: Manolescu, Ioana
name: Senellart, Pierre
Publisher: name: arXiv
Year: 2011
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: In this paper, we present the guidelines for an XML-based approach for the sociological study of Web data such as the analysis of mailing lists or databases available online. The use of an XML warehouse is a flexible solution for storing and processing this kind of data. We propose an implemented solution and show possible applications with our case study of profiles of experts involved in W3C standard-setting activity. We illustrate the sociological use of semi-structured databases by presenting our XML Schema for mailing-list warehousing. An XML Schema allows many adjunctions or crossings of data sources, without modifying existing data sets, while allowing possible structural evolution. We also show that the existence of hidden data implies increased complexity for traditional SQL users. XML content warehousing allows altogether exhaustive warehousing and recursive queries through contents, with far less dependence on the initial storage. We finally present the possibility of exporting the data stored in the warehouse to commonly-used advanced software devoted to sociological analysis.
Federated Learning with Intermediate Representation Regularization
Creators: name: Tun, Ye Lin
name: Thwal, Chu Myaet
name: Park, Yu Min
name: Park, Seong-Bae
name: Hong, Choong Seon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In contrast to centralized model training that involves data collection, federated learning (FL) enables remote clients to collaboratively train a model without exposing their private data. However, model performance usually degrades in FL due to the heterogeneous data generated by clients of diverse characteristics. One promising strategy to maintain good performance is by limiting the local training from drifting far away from the global model. Previous studies accomplish this by regularizing the distance between the representations learned by the local and global models. However, they only consider representations from the early layers of a model or the layer preceding the output layer. In this study, we introduce FedIntR, which provides a more fine-grained regularization by integrating the representations of intermediate layers into the local training process. Specifically, FedIntR computes a regularization term that encourages the closeness between the intermediate layer representations of the local and global models. Additionally, FedIntR automatically determines the contribution of each layer's representation to the regularization term based on the similarity between local and global representations. We conduct extensive experiments on various datasets to show that FedIntR can achieve equivalent or higher performance compared to the state-of-the-art approaches. Our code is available at https://github.com/YLTun/FedIntR.
description: IEEE BigComp 2023
Modulation of cardiac voltage-gated potassium channel functional expression by Kinesin I and small GTPases
Creators: name: Cheng, Yvonne
Publisher: name: University of British Columbia
Year: 2010

description: Functional expression of voltage-gated potassium (Kv) channels in the plasmalemma is essential for repolarization phase of the cardiac action potential. Therefore, changes in Kv channel plasmalemmal expression can impact cardiac action potential duration and thereby result in arrythmias. The expression of these Kv channels is modulated by a number of different mechanisms, and among these, the most important and potent one is the regulation of the number of channels in the plasma membrane through modulation of channel trafficking. The trafficking process of Kv channel in cardiac background is poorly understood. The purpose of the studies presented in this thesis was to identify the specific kinesin isoform that is required for cardiac Kv1.5 channel forward trafficking and to investigate the roles of small GTPases in the trafficking of Kv4.2 channels in adult rat ventricular myocytes. Overexpression of wild type Kif5b increased the Kv1.5-conducted current and this increase was dependent on Golgi function; a 6 h treatment with Brefeldin A reduced Kv1.5 currents to control levels in Kif5b-overexpressing cells. Expression of dominant negative isoform of Kif5b prior to induction of Kv1.5 in a tetracycline inducible system blocked surface expression of the channel in both HEK293 cells and H9c2 cardiomyoblasts. These data confirmed the requirement for Kif5b for forward trafficking of newly synthesized Kv1.5 channels. The involvement of several Rab GTPases as well as Sar1 in the trafficking of an endogenous cardiomyocyte potassium channel has also been established. Kv4.2 traffics out of the cardiac endoplasmic reticulum via a conventional pathway involving Sar1 and Rab1 and its trafficking to the sarcolemma is enhanced by overexpression of wild type Rab11. Internalization of the channels is dependent upon Rab5 function and block of Rab4 somehow also inhibits that internalization. The internalized channels, if not recycle back into plasma membrane will be degraded via the proteasomal degradation pathway. Together, these studies enhance our knowledge of the players involved in the trafficking pathway of Kv channels in cardiomyocytes. In particular, the roles of kinesin and several small GTPases in regulating cardiac Kv channel plasmmalemmal expression through channel trafficking modulation.
Two-dimensional infrared-Raman spectroscopy as a probe of water's tetrahedrality
Creators: name: Begušić, Tomislav
name: Blake, Geoffrey A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Two-dimensional spectroscopic techniques combining terahertz (THz), infrared (IR), and visible pulses offer a wealth of information about coupling among vibrational modes in molecular liquids, thus providing a promising probe of their local structure. However, the capabilities of these spectroscopies are still largely unexplored due to experimental limitations and inherently weak nonlinear signals. Here, through a combination of equilibrium-nonequilibrium molecular dynamics (MD) and a tailored spectrum decomposition scheme, we identify a relationship between the tetrahedral order of liquid water and its two-dimensional IR-IR-Raman (IIR) spectrum. The structure-spectrum relationship can explain the temperature dependence of the spectral features corresponding to the anharmonic coupling between low-frequency intermolecular and high-frequency intramolecular vibrational modes of water. In light of these results, we propose new experiments and discuss the implications for the study of tetrahedrality of liquid water.
Sub-kHz-level relative stabilization of an intracavity doubled continuous wave optical parametric oscillator using Pound-Drever-Hall scheme
Creators: name: Mhibik, O.
name: Pabœuf, D.
name: Drag, C.
name: Bretenaker, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report the relative frequency stabilization of an intracavity frequency doubled singly resonant optical parametric oscillator on a Fabry-Perotétalon. The red/orange radiation produced by the frequency doubling of the intracavity resonant idler is stabilized using the Pound-Drever-Hall locking technique. The relative frequency noise of this orange light, when integrated from 1 Hz to 50 kHz, corresponds to a standard deviation of 700 Hz. The frequency noise of the pump laser is shown experimentally to be transferred to the non resonant signal beam.
Proofs of McIntosh's Conjecture on Franel Integrals and Two Generalizations
Creators: name: Berndt, Bruce C.
name: Xie, Likun
name: Zaharescu, Alexandru
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We provide a proof of a conjecture made by Richard McIntosh in 1996 on the values of the Franel integrals, $$\int_0^1((ax))((bx))((cx))((ex))\,dx,$$ where $((x))$ is the first periodic Bernoulli function. Secondly, we extend our ideas to prove a similar theorem for $$\int_0^1((a_1x))((a_2x))\cdots ((a_{n}x))\,dx.$$ Lastly, we prove a further generalization in which $((x))$ is replaced by any particular Bernoulli function with odd index.
description: Typos corrected
In-home PLC to DSL Interference Characterization and Mitigation
Creators: name: Ali, Khaled
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Engineering--Electronics and Electrical
subject: PLC
subject: DSL
subject: Digital Subscriber Line
subject: Power line communications
subject: Interference Cancellation
subject: Channel Measurements

description: It is often advocated that a solution to the problem of mutual interference between digital subscriber line (DSL) networks and in-home power line communications (PLC) networks is to prevent the PLC networks from utilizing the DSL spectrum. However, this solution will render PLC networks inoperable with the introduction of wide-band DSL technologies like G.fast. As an alternative solution, this thesis proposes to use the common mode (CM) signal, which contains information about the electromagnetic interference (EMI), to estimate and subtract the differential mode (DM) PLC-to-DSL interference from the DM DSL signal. Since the PLC-to-DSL interference environment within a residential setting has neither been characterized via measurements nor by a model, a measurement campaign is conducted. A set of 480 measurements are collected, within two residential test-sites, to characterize the PLC-to-DSL interference environment for two DSL modem installation scenarios. This campaign shows that the PLC-to-DSL interference channels are frequency selective and vary significantly from room to room within the house. Two interference mitigation solutions are proposed in this thesis. The first solution relies on scheduling the PLC channel access; while, the second solution pre-multiplies the PLC symbol by the inverse of the DM cross-coupling channel before transmission. Both solutions utilize adaptive frequency domain interference cancellers (FDICs) that are insensitive to the non-stationarity of the PLC channel and the frequency selectivity of the coupling channels. The performances of the proposed solutions are evaluated, and their effectiveness in mitigating the PLC-to-DSL wide-band EMI is demonstrated using analysis that incorporates the measured PLC-to-DSL coupling channels.
Injection settings and drug-related harm in Vancouver, Canada
Creators: name: Small, William
Publisher: name: University of British Columbia
Year: 2010

description: Ecological approaches to addressing injection-related risk seek to reduce drug-related harm by identifying and removing environmental barriers to risk-reduction. While the settings where drugs are injected represent a key location for these efforts, further knowledge regarding the role of injection settings is required to understand and address context-specific barriers to risk-reduction. This thesis sought to employ the risk environment framework and use ethnographic methods to examine two key types of injection settings, public injection venues and a local supervised injection facility (SIF), in the Downtown Eastside (DTES) of Vancouver, Canada. Ethnographic fieldwork, including naturalistic observation of activity within drug use settings and 50 in-depth interviews with local injection drug users (IDUs), generated information regarding local public injection settings and the SIF. Generating detailed descriptions of the settings investigated, and the use of analytical approaches drawing on the risk environment framework, permitted identification of the influence of various ecological forces upon risk production/reduction in relation to these settings. In Vancouver, public injecting often occurs in spaces characterized by unsanitary conditions and a lack of adequate amenities for hygienic injecting, where the threat of street violence or arrest impedes individual ability to employ safer injecting practices. While the SIF fosters risk-reduction by addressing many of these contextual features which pose barriers to safer injecting, the perspectives of IDUs emphasise that they inject at the facility because it addresses multiple salient risk priorities, including health concerns as well as “everyday risks” associated with injecting. A contextualised understanding of the operation of Insite highlights how the interactions between macro-level forces (e.g., regulatory mechanisms), operational features of the facility, and the local drug using context shape utilisation of the SIF by local IDUs. This work highlights the importance of developing contextualized understandings of injection settings in order to identify barriers to risk-reduction, and inform the development of safer injecting environments. While initiatives fostering injection safety within existing injection settings must be pursued, these should be complemented by efforts to remove barriers to accessing SIFs.
New variational Monte Carlo method with an energy variance extrapolation for large-scale shell-model calculations
Creators: name: Mizusaki, Takahiro
name: Shimizu, Noritaka
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose a new variational Monte Carlo (VMC) method with an energy variance extrapolation for large-scale shell-model calculations. This variational Monte Carlo is a stochastic optimization method with a projected correlated condensed pair state as a trial wave function, and is formulated with the M-scheme representation of projection operators, the Pfaffian and the Markov-chain Monte Carlo (MCMC). Using this method, we can stochastically calculate approximated yrast energies and electro-magnetic transition strengths. Furthermore, by combining this VMC method with energy variance extrapolation, we can estimate exact shell-model energies.
description: 5 pages, 1 figure
Gravitational shocks as a key ingredient of Gamma-Ray Bursts
Creators: name: Avgoustidis, Anastasios
name: Jimenez, Raul
name: Alvarez-Gaume, Luis
name: Vazquez-Mozo, Miguel A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We identify a novel physical mechanism that may be responsible for energy release in $γ$-ray bursts. Radial perturbations in the neutron core, induced by its collision with collapsing outer layers during the early stages of supernova explosions, can trigger a gravitational shock, which can readily eject a small but significant fraction of the collapsing material at ultra-relativistic speeds. The development of such shocks is a strong-field effect arising in near-critical collapse in General Relativity and has been observed in numerical simulations in various contexts, including in particular radially perturbed neutron star collapse, albeit for a tiny range of initial conditions. Therefore, this effect can be easily missed in numerical simulations if the relevant parameter space is not exhaustively investigated. In the proposed picture, the observed rarity of $γ$-ray bursts would be explained if the relevant conditions for this mechanism appear in only about one in every $10^4-10^5$ core collapse supernovae. We also mention the possibility that near-critical collapse could play a role in powering the central engines of Active Galactic Nuclei.
description: 9 pages, 3 figures
Path integrals and stochastic calculus
Creators: name: de Pirey, Thibaut Arnoulx
name: Cugliandolo, Leticia F.
name: Lecomte, Vivien
name: van Wijland, Frédéric
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Path integrals are a ubiquitous tool in theoretical physics. However, their use is sometimes hindered by the lack of control on various manipulations -- such as performing a change of the integration path -- one would like to carry out in the light-hearted fashion that physicists enjoy. Similar issues arise in the field of stochastic calculus, which we review to prepare the ground for a proper construction of path integrals. At the level of path integration, and in arbitrary space dimension, we not only report on existing Riemannian geometry-based approaches that render path integrals amenable to the standard rules of calculus, but also bring forth new routes, based on a fully time-discretized approach, that achieve the same goal. We illustrate these various definitions of path integration on simple examples such as the diffusion of a particle on a sphere.
description: 96 pages, 4 figures. New title, expanded introduction and additional references. Version accepted in Advandes in Physics
Light-Hole Gate-Defined Spin-Orbit Qubit
Creators: name: Del Vecchio, Patrick
name: Moutanabbir, Oussama
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The selective confinement of light-holes (LHs) is demonstrated by introducing a low-dimensional system consisting of highly tensile-strained Ge quantum well enabling the design of an ultrafast gate-defined spin qubit under the electric dipole spin resonance. The qubit size-dependent $g$-factor and dipole moment are mapped, and the parameters inducing their modulation are discussed. It is found that the LH qubit dipole moment is 2 to 3 orders of magnitude higher than that of the canonical heavy-hole qubit. This behavior originates from the significant spin splitting resulting from the combined action of large cubic and linear Rashba spin-orbit interactions that are peculiar to LHs. The qubit relaxation rate is also affected by the strong spin-orbit interaction and follows typically a $B^7$ behavior. The proposed all-group IV, direct bandgap LH qubit provides an effective platform for a scalable qubit-optical photon interface sought-after for long-range entanglement distribution and quantum networks.
Component Placement in Hip and Knee Replacement Surgery: Device Development, Imaging and Biomechanics
Creators: name: Akbari Shandiz, Mohsen
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Engineering--Biomedical
subject: Total knee arthroplasty
subject: Knee kinematics
subject: Knee shape
subject: Quality of Life
subject: Component malalignment
subject: Patellar tracking
subject: Knee Geometery
subject: Total hip arthroplasty
subject: Acetabular cup orientation

description: Total joint replacement replaces the worn surfaces of arthritic joints with artificial components. This usually results in significant pain relief, but problems persist in some patients. An important contributor to postoperative complications following joint replacement is component malalignment. The goal of the work described is to improve component placement in total hip and knee arthroplasty. As one of the main objectives in this work, an adjustable mechanical device, called Optihip, was developed and tested to improve the accuracy of acetabular cup alignment in hip replacement surgery. An ex vivo study demonstrated the accuracy and feasibility of the device for guiding orientation and depth of the acetabular cup. With respect to knee replacement surgery, preoperative and postoperative weightbearing patellofemoral and tibiofemoral kinematics throughout the range of motion, using calibrated sequential-biplanar radiographic imaging at 8 flexion angles, are reported for nine subjects before and at least one year after total knee arthroplasty (TKA). Changes in the articular geometry of knee joints for the same nine subjects are also investigated by matching the three-dimensional (3D) implant models to the 3D bone-implant volume from computed-tomography (CT) imaging. Relationships between the subjects’ quality of life (QOL) and changes in knee articular geometry and kinematics are also evaluated. There were significant differences between pre-TKA and post-TKA kinematics in this pilot study, although not for all degrees of freedom. Patellofemoral and femoral analyses showed that the knee shape and geometry changed in numerous significant ways as a result of the TKA. There were also significant correlations between shape, kinematics and QOL parameters. Postoperative QOL in this cohort was better for a more lateralized proximal femoral groove, smaller changes in femoral condylar dimensions, more lateralized patellofemoral mediolateral translation and shift, less patellar tilt, more internal TF internal-external rotation and fewer individual shape and kinematic high/low values. Postoperative patellar tracking followed the femoral component groove more closely than the original preoperative tracking, suggesting that the femoral groove has more control over patellar tracking than the soft tissues.
Structure of plasma deposited acrylic acid‐allyl alcohol copolymers
Creators: name: Fahmy, Alaa
name: Omar, Hassan
name: Szymoniak, Paulina
name: Schönhals, Andreas
name: Friedrich, Jörg Florian
Publisher: name: Technische Universität Berlin
Year: 2023
Subjects: subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
subject: acrylic acid
subject: allyl alcohol
subject: copolymer thin film
subject: plasma deposition
subject: segmental mobility

description: Copolymer thin films with two types of functional groups have excellent performance as sensors, for example. The formation and deposition of allyl alcohol-acrylic acid copolymer films by pulsed high frequency plasma is a complex process. As usual, the chemical composition of the top surface of the films was investigated by XPS and FTIR measurements. Furthermore, contact angle measurements with water were used to characterise the hydrophilicity and wettability of the polymer films. After plasma deposition, a significant decrease in functional groups (OH and COOH) was observed compared to the classically copolymerised equivalent. The remaining functional groups, i.e. the majority of these groups, were sufficient for application as sensor layers. Segmental mobility and conductivity, important for sensor applications, were analysed by broadband dielectric spectroscopy.
A Contemporary View of Coronal Heating
Creators: name: Parnell, Clare E.
name: De Moortel, Ineke
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Determining the heating mechanism (or mechanisms) that causes the outer atmosphere of the Sun, and many other stars, to reach temperatures orders of magnitude higher than their surface temperatures has long been a key problem. For decades the problem has been known as the coronal heating problem, but it is now clear that `coronal heating' cannot be treated or explained in isolation and that the heating of the whole solar atmosphere must be studied as a highly coupled system. The magnetic field of the star is known to play a key role, but, despite significant advancements in solar telescopes, computing power and much greater understanding of theoretical mechanisms, the question of which mechanism or mechanisms are the dominant supplier of energy to the chromosphere and corona is still open. Following substantial recent progress, we consider the most likely contenders and discuss the key factors that have made, and still make, determining the actual (coronal) heating mechanism (or mechanisms) so difficult.
Representing Conversations for Scalable Overhearing
Creators: name: Gutnik, G.
name: Kaminka, G. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Open distributed multi-agent systems are gaining interest in the academic community and in industry. In such open settings, agents are often coordinated using standardized agent conversation protocols. The representation of such protocols (for analysis, validation, monitoring, etc) is an important aspect of multi-agent applications. Recently, Petri nets have been shown to be an interesting approach to such representation, and radically different approaches using Petri nets have been proposed. However, their relative strengths and weaknesses have not been examined. Moreover, their scalability and suitability for different tasks have not been addressed. This paper addresses both these challenges. First, we analyze existing Petri net representations in terms of their scalability and appropriateness for overhearing, an important task in monitoring open multi-agent systems. Then, building on the insights gained, we introduce a novel representation using Colored Petri nets that explicitly represent legal joint conversation states and messages. This representation approach offers significant improvements in scalability and is particularly suitable for overhearing. Furthermore, we show that this new representation offers a comprehensive coverage of all conversation features of FIPA conversation standards. We also present a procedure for transforming AUML conversation protocol diagrams (a standard human-readable representation), to our Colored Petri net representation.