cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
NICER observations reveal that the X-ray transient MAXI J1348-630 is a Black Hole X-ray binary
Creators: name: Zhang, L.
name: Altamirano, D.
name: Cuneo, V. A.
name: Alabarta, K.
name: Enoto, T.
name: Homan, J.
name: Remillard, R. A.
name: Uttley, P.
name: Vincentelli, F. M.
name: Arzoumanian, Z.
name: Bult, P.
name: Gendreau, K. C.
name: Markwardt, C.
name: Sanna, A.
name: Strohmayer, T. E.
name: Steiner, J. F.
name: Basak, A.
name: Neilsen, J.
name: Tombesi, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We studied the outburst evolution and timing properties of the recently discovered X-ray transient MAXI J1348-630 as observed with NICER. We produced the fundamental diagrams commonly used to trace the spectral evolution, and power density spectra to study the fast X-ray variability. The main outburst evolution of MAXI J1348-630 is similar to that commonly observed in black hole transients. The source evolved from the hard state, through hard- and soft-intermediate states, into the soft state in the outburst rise, and back to the hard state in reverse during the outburst decay. At the end of the outburst, MAXI J1348-630 underwent two reflares with peak fluxes ~1 and ~2 orders of magnitude fainter than the main outburst, respectively. During the reflares, the source remained in the hard state only, without undergoing any state transitions, which is similar to the so-called "failed outbursts". Different types of quasi-periodic oscillations (QPOs) are observed at different phases of the outburst. Based on our spectral-timing results, we conclude that MAXI J1348-630 is a black hole candidate.
description: 12 pages, 8 figures, 1 table, accepted for publication in MNRAS
title: Геологоразведчик Анатолий Индекович Ким и начало большой нефти в Сургутском Приобье
title: Explorer Anatoly Indekovich Kim and the Biginning of Big Oil in the Surgut Region
Creators: name: Лешукова, Елена Владимировна
Publisher: name: Издательский центр СурГУ
Year: 2021

description: В историю становления Западно-Сибирского нефтегазового комплекса в 1960–1970 годы вписано много славных имен первопроходцев, усилиями которых были разведаны северные недра и выиграна мировая энергетическая гонка СССР. К сожалению, в наши дни многие из этих людей забыты. В статье освещается профессиональное становление заслуженного работника нефтяной и газовой промышленности РФ, заслуженного геолога РФ, Почетного гражданина ЯНАО Анатолия Индековича Кима (1935–2016 гг.), начинавшееся в конце 1950-х годов на Сургутской земле. Автор выражает благодарность Анатолию Анатольевичу Киму за предоставление материалов об отце и оказание консультационной помощи.
description: In the history of the formation of the West Siberian oil and gas complex in the 1960-1970s, many glorious names of pioneers were written, through whose efforts the northern bowels were explored and the world energy race of the USSR was won. Unfortunately, many of these people are forgotten these days. The article highlights the professional development of Anatoly Indekovich Kim (1935–2016), Honored Worker of the Oil and Gas Industry of the Russian Federation, Honored Geologist of the Russian Federation, Honorary Citizen of the Yamalo-Nenets Autonomous Okrug, which began in the late 1950s on the Surgut land. The author expresses his gratitude to Anatoly Anatolyevich Kim for providing materials about his father and providing consulting assistance.
Dark Energy from Brane-world Gravity
Creators: name: Maartens, Roy
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recent observations provide strong evidence that the universe is accelerating. This confronts theory with a severe challenge. Explanations of the acceleration within the framework of general relativity are plagued by difficulties. General relativistic models require a "dark energy" field with effectively negative pressure. An alternative to dark energy is that gravity itself may behave differently from general relativity on the largest scales, in such a way as to produce acceleration. The alternative approach of modified gravity also faces severe difficulties, but does provide a new angle on the problem. This review considers an example of modified gravity, provided by brane-world models that self-accelerate at late times.
description: Based on a talk at the 3rd Aegean Summer School, Chios, September 2005
title: Multiscale modelling of soft lattice metamaterials: micromechanical nonlinear buckling analysis, experimental verification, and macroscale constitutive behaviour
Creators: name: Jamshidian, Mostafa
name: Boddeti, Narasimha
name: Rosen, David W.
name: Weeger, Oliver
Publisher: name: Elsevier
Year: 2022

description: Soft lattice structures and beam-metamaterials made of hyperelastic, rubbery materials undergo large elastic deformations and exhibit structural instabilities in the form of micro-buckling of struts under both compression and tension. In this work, the large-deformation nonlinear elastic behaviour of beam-lattice metamaterials is investigated by micromechanical nonlinear buckling analysis. The micromechanical 3D beam finite element model uses a primary linear buckling analysis to incorporate the effect of geometric imperfections into a subsequent nonlinear post-buckling analysis. The micromechanical computational model is validated against tensile and compressive experiments on a 3D-printed sample lattice structure manufactured via multi-material jetting. For the development and calibration of macroscale continuum constitutive models for nonlinear elastic deformation of soft lattice structures at finite strains, virtual characterization tests are conducted to quantify the effective nonlinear response of representative unit cells under periodic boundary conditions. These standard tests, commonly used for hyperelastic material characterization, include uniaxial, biaxial, planar and volumetric tension and compression, as well as simple shear. It is observed that besides the well-known stretch- and bending-dominated behaviour of cellular structures, some lattice types are dominated by buckling and post-buckling response. For multiscale simulation based on nonlinear homogenization, the uniaxial standard test results are used to derive parametric hyperelastic constitutive relations for the effective constitutive behaviour of representative unit cells in terms of lattice aspect ratio. Finally, a comparative study for compressive deformation of a sample sandwich lattice structure simulated by both full-scale beam and continuum finite element models shows the feasibility and computational efficiency of the effective continuum model.
Elicitation on ejectives, subject focus, and distal aspect
Creators: name: Carrillo Godínez, Silvia Lucrecia
name: Martín Domingo, Rebeca
name: Scott, Tessa
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: mam

description: This is an in-person interview.

The elicitation focuses on the pronunciation of ejectives in initial positions, in-situ subject focus, and the distal aspect.

In this file bundle: 2 audio recording files (.wav) and 1 pdf of handwritten notes.
Low-frequency whistler waves excited by relativistic laser pulses
Creators: name: Song, Huai-Hang
name: Wang, Wei-Min
name: Wang, Jia-Qi
name: Li, Yu-Tong
name: Zhang, Jie
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: It is shown by multi-dimensional particle-in-cell simulations that intense secondary whistler waves with special vortex-like field topology can be excited by a relativistic laser pulse in the highly magnetized, near-critical density plasma. Such whistler waves with lower frequencies obliquely propagate on both sides of the laser propagation axis. The energy conversion rate from laser to whistler waves can exceed 15%. Their dispersion relations and field polarization properties can be well explained by the linear cold-plasma model. The present work presents a new excitation mechanism of whistler modes extending to the relativistic regime and could also be applied in magnetically assisted fast ignition.
description: 9 pages, 10 figures, accepted for publication in Phys. Rev. E
Improved Coefficients for the Karagiannidis-Lioumpas Approximations and Bounds to the Gaussian Q-Function
Creators: name: Tanash, Islam M.
name: Riihonen, Taneli
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We revisit the Karagiannidis-Lioumpas (KL) approximation of the Q-function by optimizing its coefficients in terms of absolute error, relative error and total error. For minimizing the maximum absolute/relative error, we describe the targeted uniform error functions by sets of nonlinear equations so that the optimized coefficients are the solutions thereof. The total error is minimized with numerical search. We also introduce an extra coefficient in the KL approximation to achieve significantly tighter absolute and total error at the expense of unbounded relative error. Furthermore, we extend the KL expression to lower and upper bounds with optimized coefficients that minimize the error measures in the same way as for the approximations.
description: IEEE Communications Letters
Probing the nature of dark matter with Cosmic X-rays: Constraints from "Dark blobs" and grating spectra of galaxy clusters
Creators: name: Riemer-Sorensen, Signe
name: Pedersen, Kristian
name: Hansen, Steen H.
name: Dahle, Haakon
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Gravitational lensing observations of galaxy clusters have identified dark matter ``blobs'' with remarkably low baryonic content. We use such a system to probe the particle nature of dark matter with X-ray observations. We also study high resolution X-ray grating spectra of a cluster of galaxies. From these grating spectra we improve the conservative constraints on a particular dark matter candidate, the sterile neutrino, by more than one order of magnitude. Based on these conservative constraints obtained from Cosmic X-ray observations alone, the low mass (m_s < 10keV) and low mixing angle (sin^2(2θ) 10^{-6}) sterile neutrino is still a viable dark matter candidate.
description: 4 pages, 4 figures
Comprehensive fabrication of SNAP microresonators by a femtosecond laser
Creators: name: Yu, Qi
name: Zhang, Zhen
name: Shu, Xuewen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Surface nanoscale axial photonics (SNAP) microresonators with nanoscale effective radius variation (ERV) along optical fiber axis can be fabricated by inscribing axially oriented lines inside the fiber with a femtosecond laser. The optimization of variable parameters in the femtosecond laser inscription technique is of great significance for flexible and ultra-high precision control of ERV, which is vital to the performance of SNAP devices. Here, we present the first systematical investigation on the relationships between the various controllable fabrication parameters and the introduced ERV of the SNAP microresonators. Specifically, both the qualitative and quantitative processing principles were revealed. As a proof-of-principle, by comprehensively optimizing the fabrication parameters, we realized a SNAP microresonator with the characteristics of both small axial size and maximal ERV, which is almost impossible to realize with other SNAP fabrication techniques. Our work promotes the fs laser inscription technology to be a flexible and versatile approach for fabricating the SNAP devices with ultra-high precision, ultra-low loss and high robustness.
description: 12 pages, 9 figures. It is submitted to the journal called " Photonics Research" under the peer-review process, while has not been published
A finite element study of the influence of the osteotomy surface on the backward displacement during exophthalmia reduction
Creators: name: Luboz, Vincent
name: Pedrono, Annaig
name: Ambard, Dominique
name: Boutault, Franck
name: Swider, Pascal
name: Payan, Yohan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Exophthalmia is characterized by a protrusion of the eyeball. The most frequent surgery consists in an osteotomy of the orbit walls to increase the orbital volume and to retrieve a normal eye position. Only a few clinical obser-vations have estimated the relationship between the eyeball backward dis-placement and the decompressed fat tissue volume. This paper presents a method to determine the relationship between the eyeball backward displace-ment and the osteotomy surface made by the surgeon, in order to improve ex-ophthalmia reduction planning. A poroelastic finite element model involving morphology, material properties of orbital components, and surgical gesture is proposed to perform this study on 12 patients. As a result, the osteotomy sur-face seems to have a non-linear influence on the backward displacement. More-over, the FE model permits to give a first estimation of an average law linking those two parameters. This law may be helpful in a surgical planning frame-work.
EXPLORING THE FUNCTIONAL MORPHOLOGY OF HUMAN UTERINE TUBES IN THE 21ST CENTURY: UNCOVERING ANATOMICAL INNOVATIONS AND THEIR POTENTIAL CLINICAL USES
Creators: name: Bakoyeva, Feruza
Publisher: name: Zenodo
Year: 2024

description: Pathologies of the uterine tube (UT) contribute to 25-35% of female factor infertility. Despite being studied centuries ago, these organs have been largely overlooked and neglected, primarily due to the advancements in reproductive medicine. However, challenges persist in achieving optimal fertility outcomes with in vitro fertilization (IVF). A more nuanced understanding of UT morphology and function during normal reproduction can potentially address many obstacles in reproductive medicine.
Non-Riemannian gravity actions from double field theory
Creators: name: Gallegos, A. D.
name: Gürsoy, U.
name: Verma, S.
name: Zinnato, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Non-Riemannian gravitational theories suggest alternative avenues to understand properties of quantum gravity and provide a concrete setting to study condensed matter systems with non-relativistic symmetry. Derivation of an action principle for these theories generally proved challenging for various reasons. In this technical note, we employ the formulation of double field theory to construct actions for a variety of such theories. This formulation helps removing ambiguities in the corresponding equations of motion. In particular, we embed Torsional Newton-Cartan gravity, Carrollian gravity and String Newton-Cartan gravity in double field theory, derive their actions and compare with the previously obtained results in literature.
Controlling chaos in spatially extended beam-plasma system by the continuous delayed feedback
Creators: name: Hramov, Alexander
name: koronovskii, Alexey
name: Rempen, Irene
Publisher: name: arXiv
Year: 2006
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: In present paper we discuss the control of complex spatio-temporal dynamics in a {spatially extended} non-linear system (fluid model of Pierce diode) based on the concepts of controlling chaos in the systems with few degrees of freedom. A presented method is connected with stabilization of unstable homogeneous equilibrium state and the unstable spatio-temporal periodical states analogous to unstable periodic orbits of chaotic dynamics of the systems with few degrees of freedom. We show that this method is effective and allows to achieve desired regular dynamics chosen from a number of possible in the considered system.
description: 12 pages, 12 figures
The experience of attaining respect in the face of differences
Creators: name: Best, Heather M.G.
Publisher: name: University of British Columbia
Year: 2009

description: This study to examines the experience of attaining respect in the face of differences through the eyes of eight North American Caucasian members of the helping professions. A hermeneutic- phenomenological, multiple case study design using an interview guide approach was the methodology chosen to describe the co-researchers' experience of respect — what it is, and how to attain respect when it is lost. During audio-taped interviews, the coresearchers related stories of times when they had to struggle to be respectful. After relating the stories they were asked for their thoughts on the meaning of respect. The analysis revealed a six step non-linear process of becoming respectful. The themes involved in the process are the trigger event, the reaction, stopping the reaction, shift in focus to examine one's self, acceptance of self, looking again at the other, acceptance of the other and the outcome behaviour. Intrinsically involved in the process were concepts of identity, self respect, boundaries, context, and expectations. These themes were simultaneously foundational and integral to the process themes. The study compares the philosophical definitions of respect, Rogers' concept of unconditional positive regard the co-researchers' conceptions of respect and their lived experience finding a core consensus.
On the Use of muscle activation patterns and artificial intelligence methods for the assessment of the surgical skills of clinicians†
Creators: name: Nsugbe, Ejay
name: Buruno, Halin
name: Connelly, Stephanie
name: Samuel, Oluwarotimi Williams
name: Obajemu, Olusayo
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 42
subject: Health sciences
subject: FOS: Health sciences
classificationCode: 40
subject: Engineering

description: The ranking and evaluation of a surgeon’s surgical skills is an important factor in order to be able to appropriately assign patient cases according to the necessary level of surgeon competence in addition to helping us in the process of pinpointing the specific clinicians within the surgical cohort who require further developmental training. One of the more frequent means of surgical skills evaluation is through a qualitative assessment of a surgeon’s portfolio alongside other supporting pieces of information, a process which is rather subjective. The contribution presented as part of this paper involves the use of a set of Delsys Trigno EMG wearable sensors, which track and record the muscular activation patterns of a surgeon during a surgical procedure, alongside computationally driven artificial intelligence (AI) methods towards the differentiation and ranking of the surgical skills of a clinician in a quantitative fashion. The participants in the research involved novice-level surgeons, intermediate-level surgeons and expert-level surgeons in various simulated surgical cases. A comparison of different signal processing approaches has shown that the proposed approach can prove beneficial in monitoring and differentiating the skillsets of various surgeons for various kinds of surgical cases. The presented method could also be used to track the evolution of the surgical competencies of various trainee surgeons at various stages during their training
Evolution of a Viscous Protoplanetary Disk with Convectively Unstable Regions. II. Accretion Regimes and Long-Term Dynamics
Creators: name: Maksimova, L. A.
name: Pavlyuchenkov, Ya. N.
name: Tutukov, A. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In this article, we proceed to study convection as a possible factor of episodic accretion in protoplanetary disks. Within the model presented in Article~I, the accretion history is analyzed at different rates and areas of matter inflow from the envelope onto the disk. It is shown that the burst-like regime occurs in a wide range of parameters. The long-term evolution of the disk is also modeled, including the decreasing-with-time matter inflow from the envelope. It is demonstrated that the disk becomes convectively unstable and maintains burst-like accretion onto the star for several million years. Meanwhile, the instability expands to an area of several tens of astronomical units and gradually decreases with time. It is also shown that at early stages in the disk evolution, conditions arise for gravitational instability in the outer parts of the disk and for dust evaporation in the convectively unstable inner regions. The general conclusion of the study is that convection can serve as one of the mechanisms of episodic accretion in protostellar disks, but this conclusion needs to be verified using more consistent hydrodynamic models.
Searching for Extra Z' from Strings and Other Models at the LHC with Leptoproduction
Creators: name: Coriano, Claudio
name: Faraggi, Alon E.
name: Guzzi, Marco
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Discovery potentials for extra neutral interactions at the Large Hadron Collider in forthcoming experiments are analyzed using resonant leptoproduction. For this purpose we use high precision next-to-next-to-leading order (NNLO) determinations of the QCD background in this channel, at the tail of the Drell-Yan distributions, in the invariant mass region around $ 0.8< Q < 2.5 $ TeV. We focus our analysis primarily on a novel string-inspired $Z^\prime$, obtained in left-right symmetric free fermionic heterotic string models and whose existence at low energies is motivated by its role in suppressing proton decay mediation. We analyze the parametric dependence of the predictions and perform comparison with other models based on bottom up approaches, that are constructed by requiring anomaly cancellation and enlarged Higgs structure. We show that the results are not particularly sensitive to the specific charge assignments. This may render quite difficult the extraction of significant information from the forward-backward asymmetries on the resonance, assuming that these are possible due to a sizeable width. The challenge to discover extra (non anomalous) $Z^\prime$ in this kinematic region remains strongly dependent on the size of the new gauge coupling. Weakly coupled extra $Z^\prime$ will not be easy to identify even with a very good theoretical determination of the QCD background through NNLO.
description: 33 pages, 14 figures
INSON HUQUQLARI UMUMJAHON DEKLARATSIYASING HAYOTIMIZDA TUTGAN O'RNI
Creators: name: Ergashova, Sabrina
Publisher: name: Zenodo
Year: 2024

description: Hozirgi yanada globallashayotgan dunyoda, uzoq zamonlardan beri insoniyatni tashvishga solib kelayotgan inson huquqlari masalasi dolzarb muammolardan bo‘lib kelmoqda. Ushbu tezis “Inson huquqlari Umumjahon deklaratsiyasi’’ va unda nazarda tutilgan normalar haqida ma’lumot beradi.
Scattering polarization of 3-$μ$m water-ice feature by large icy grains
Creators: name: Tazaki, Ryo
name: Murakawa, Koji
name: Muto, Takayuki
name: Honda, Mitsuhiko
name: Inoue, Akio K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Water ice has a strong spectral feature at a wavelength of approximately $3~μ$m, which plays a vital role in our understanding of the icy universe. In this study, we investigate the scattering polarization of this water-ice feature. The linear polarization degree of light scattered by $μ$m-sized icy grains is known to be enhanced at the ice band; however, the dependence of this polarization enhancement on various grain properties is unclear. We find that the enhanced polarization at the ice band is sensitive to the presence of $μ$m-sized grains as well as their ice abundance. We demonstrate that this enhancement is caused by the high absorbency of the water-ice feature, which attenuates internal scattering and renders the surface reflection dominant over internal scattering. Additionally, we compare our models with polarimetric observations of the low-mass protostar L1551 IRS 5. Our results show that scattering by a maximum grain radius of a few microns with a low water-ice abundance is consistent with observations. Thus, scattering polarization of the water-ice feature is a useful tool for characterizing ice properties in various astronomical environments.
description: 19 pages, 17 figures, 1 table; Accepted for publication in ApJ
Comparison of linear and non-linear soft tissue models with post-operative CT scan in maxillofacial surgery
Creators: name: Chabanas, Matthieu
name: Payan, Yohan
name: Marecaux, Christophe
name: Swider, Pascal
name: Boutault, Franck
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: A Finite Element model of the face soft tissue is proposed to simulate the morphological outcomes of maxillofacial surgery. Three modelling options are implemented: a linear elastic model with small and large deformation hypothesis, and an hyperelastic Mooney-Rivlin model. An evaluation procedure based on a qualitative and quantitative comparison of the simulations with a post-operative CT scan is detailed. It is then applied to one clinical case to evaluate the differences between the three models, and with the actual patient morphology. First results shows in particular that for a "simple" clinical procedure where stress is less than 20%, a linear model seams sufficient for a correct modelling.
Maxwell Equations without a Polarization Field using a paradigm from biophysics
Creators: name: Eisenberg, Robert S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Electrodynamics is usually written with a polarization vector field to describe the response of matter to electric fields, or more specifically, to describe changes in distribution of charge as an electric field is changed. This approach does not allow unique specification of a polarization field from measurements of electric and magnetic fields. Many polarization fields produce the same electric and magnetic fields, because only the divergence of the polarization enters Maxwell's first equation, relating charge and electric field. The curl of any function can be added to a polarization field without changing the electric field at all. The divergence of the curl is always zero. Models of structures that produce polarization cannot be uniquely determined from electrical measurements for the same reason. Models must describe charge distribution not just distribution of polarization to be unique. I propose a different paradigm to describe field dependent charge, i.e., to describe the phenomena of polarization. I propose an operational definition of polarization that has worked well in biophysics where a field dependent, time dependent polarization provides the gating current that makes neuronal sodium and potassium channels respond to voltage. The operational definition has been applied successfully to experiments for nearly fifty years. Estimates of polarization have been computed from simulations, models, and theories using this definition and they fit experimental data quite well. I propose that the same operational definition be used to define polarization charge in experiments, models, computations, theories, and simulations of other systems. Charge movement needs to be computed from a combination of electrodynamics and mechanics because 'everything interacts with everything else'. The classical polarization field need not enter into that treatment at all.
description: Typos corrected
Hyperdiffusion as a Mechanism for Solar Coronal Heating
Creators: name: van Ballegooijen, A. A.
name: Cranmer, S. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A theory for the heating of coronal magnetic flux ropes is developed. The dissipated magnetic energy has two distinct contributions: (1) energy injected into the corona as a result of granule-scale, random footpoint motions, and (2) energy from the large-scale, nonpotential magnetic field of the flux rope. The second type of dissipation can be described in term of hyperdiffusion, a type of magnetic diffusion in which the helicity of the mean magnetic field is conserved. The associated heating rate depends on the gradient of the torsion parameter of the mean magnetic field. A simple model of an active region containing a coronal flux rope is constructed. We find that the temperature and density on the axis of the flux rope are lower than in the local surroundings, consistent with observations of coronal cavities. The model requires that the magnetic field in the flux rope is stochastic in nature, with a perpendicular length scale of the magnetic fluctuations of order 1000 km.
description: 9 pages (emulateapj style), 4 figures, ApJ, in press (v. 679; June 1, 2008)
"GLOBALLASHUVNING FALSAFIY MUAMMOLARI"
Creators: name: Xolmurodov, Behruz
Publisher: name: Zenodo
Year: 2024

description: Mazkur maqolada bugungi kundagi barcha soxada globallashuv keskin tuz oldi. Madaniyat soxasida, siyosat va shu kabi turli xil yo’nalishlarda o’z ta’sirini ko’rsatmoqda. Ushbu bo’layotgan globallashuvlarga shunchaki ko’z yumishimizning iloji yo’q. Ushbu insho falsafiy muammolarni globallashuv kontekstida ajratib ko'rsatishga harakat qiladi, ular bir-biri bilan chambarchas bog'liqligini va ko'p tarmoqli yondashuvni talab qiladi. Siz quyidagi maqolada globallashuvning turli xil ko’rinishlariga va yechimlariga guvoh bo’lasiz.
Fully developed triplet proximity effect
Creators: name: Braude, V.
name: Nazarov, Yu. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a model for fully developed triplet proximity effect in superconductor-ferromagnet heterostructures. Within the circuit-theory approximation, we evaluate the Green's functions, the density of states, and the Josephson current that depend essentially on the magnetization configuration.
description: 4 pages, 4 figures
SOLIQLAR VA BOSHQA MAJBURIY TO`LOVLAR TASNIFI,TURLARI HAMDA HISOBGA OLISH VAZIFALARI
Creators: name: VALISHEROV, DURBEK
Publisher: name: Zenodo
Year: 2024

description: Maqola soliq va boshqa majburiy to‘lovlar bo‘yicha qarzdorlikni kamaytirish yo‘llariga bag‘ishlangan bo‘lib, qarzdorlikni majburiy undirish mexanizmidagi o‘zgarishlar va takomillashtirish   masalalari   atroflicha   yoritilgan.   Tadqiqot   natijasida   tegishli   xulosalar shakllantirilib, ilmiy taklif va amaliy tavsiyalar ishlab chiqilgan.
Text: Tq'ij q'a Geovany (Geovany's day)
Creators: name: Carrillo Godínez, Silvia Lucrecia
name: Scott, Tessa
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: mam

description: In this recording, Silvia provides a story to explain the use of the classifier q'a "boy", showing that it can be used anaphorically to reference the main subject of the story.

In this file bundle: 1 audio recording with a photo (subtitled in Mam, English, and Spanish), 1 pdf with the text typed in Mam, English, and Spanish, 1 pdf with the text glossed and translated to English.
Octet and decuplet baryon self-energies in relativistic SU(3) chiral effective theory
Creators: name: Copeland, P. M.
name: Ji, Chueng-Ryong
name: Melnitchouk, W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The self-energies of the full set of flavor SU(3) octet and decuplet baryons are computed within a relativistic chiral effective theory framework. The leading nonanalytic chiral behavior is derived for the octet and decuplet masses, and a finite-range regularization consistent with Lorentz and gauge invariance is applied to account for the finite size of the baryons. Using a four-dimensional dipole form factor, the relative importance of various meson-baryon loop contributions to the self-energies is studied numerically as a function of the dipole range parameter and meson mass, and comparison is made between the relativistic results and earlier approximations within the heavy baryon limit.
description: 42 pages, 7 figures
Physical modelling of the airflow-walls interactions to understand the sleep apnea syndrome
Creators: name: Payan, Yohan
name: Pelorson, Xavier
name: Perrier, Pascal
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Sleep Apnea Syndrome (SAS) is defined as a partial or total closure of the patient upper airways during sleep. The term "collapsus" (or collapse) is used to describe this closure. From a fluid mechanical point of view, this collapse can be understood as a spectacular example of fluid-walls interaction. Indeed, the upper airways are delimited in their largest part by soft tissues having different geometrical and mechanical properties: velum, tongue and pharyngeal walls. Airway closure during SAS comes from the interaction between these soft tissues and the inspiratory flow. The aim of this work is to understand the physical phenomena at the origin of the collapsus and the metamorphosis in inspiratory flow pattern that has been reported during SAS. Indeed, a full comprehension of the physical conditions allowing this phenomenon is a prerequisite to be able to help in the planning of the surgical gesture that can be prescribed for the patients. The work presented here focuses on a simple model of fluid-walls interactions. The equations governing the airflow inside a constriction are coupled with a Finite Element (FE) biomechanical model of the velum. The geometries of this model is extracted from a single midsagittal radiography of a patient. The velar deformations induced by airflow interactions are computed, presented, discussed and compared to measurements collected onto an experimental setup.
Determination of Fundamental Properties of M-dwarfs from New Model Atmospheres and Spectra
Creators: name: Iyer, Aishwarya
name: Line, Michael
name: Muirhead, Philip
name: Fortney, Jonathan
name: Gharib-Nezhad, Ehsan
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the Main Sequence

description: Abstract About 70% of stars in the Milky Way galaxy are M-dwarfs. They span a range of low masses (0.08 - 0.6 solar mass), have faint luminosities (less than 0.05 solar luminosity), and temperatures ranging between 2500 K - 4000 K, facilitating molecule formation throughout their atmospheres. Standard stellar analysis methods to accurately characterize them have thus far proved challenging—in not correctly accounting for vast variations in their atmospheric structures. Our modeling framework will determine fundamental atmospheric properties of M-dwarfs with a two-pronged approach: a physically motivated self-consistent radiative-convective model grid with up-to-date opacities, constrained by thermo-chemical and hydrostatic equilibrium, radiative and convective transport as well as a data-driven Bayesian retrieval technique. We leverage the broadband molecular absorption features occurring in low-resolution M-dwarf spectra (from SpeX Prism Library) and use them to our advantage in acquiring robust constraints on the effective temperature, surface gravity and bulk chemical properties of M-dwarf atmospheres. Our approach lies in the interface between the standard self-consistent prescription for modeling stellar atmospheres and an assumption-free data-driven retrieval method, where new physical intuition can be obtained about our understanding of low-mass stars.
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High performance integrated polarizers achieved by incorporating 2D layered graphene oxide films
Creators: name: Wu, Jiayang
name: Yang, Yunyi
name: Zhang, Yuning
name: Qu, Yang
name: Xu, Xingyuan
name: Jia, Linnan
name: Liang, Yao
name: Chu, Sai T.
name: Little, Brent E.
name: Morandotti, Roberto
name: Jia, Baohua
name: Moss, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Polarizers and polarization selective resonant cavities (e.g., ring resonators, gratings), are key components for applications to photography, coherent optical detection, polarization-division-multiplexing, optical sensing and liquid crystal displays. We demonstrate waveguide polarizers and polarization discriminating micro-ring resonators (MRRs) by integrating them with 2D graphene oxide (GO) layered thin films. We achieve precise control of the thickness, placement, and size of the films integrated onto photonic devices with a solution based, layer-by-layer transfer-free coating method combined with photolithography and lift-off. This overcomes limitations of layer transfer methods for 2D materials and is a significant advance to manufacturing integrated photonic devices incorporated with 2D materials. We measure the waveguide polarizer for different film thicknesses and lengths versus wavelength, polarization, and power, measuring a high polarization dependent loss (PDL) of ~ 53.8 dB. For GO-coated MRRs, we achieve an extinction ratio difference for TE/TM polarizations of 8.3-dB. We also present measurements of the linear optical properties of 2D layered GO films that yield the material loss anisotropy of the GO films and relative contribution of film loss anisotropy versus polarization-dependent mode overlap. Our results offer interesting physical insights into the transition of the layered GO films from 2D behaviour to quasi bulk like behavior and confirm the high performance of GO based integrated polarization selective devices.
description: 8 pages, 5 figures, 55 references. arXiv admin note: text overlap with arXiv:1907.06861
title: Quantum foundation experiments with active feed-forward
Creators: name: Antesberger, Michael
Publisher: name: TU Wien
Year: 2021
Subjects: subject: Maxwell Dämon
subject: Quanten Termodynamik
subject: Quantum SWITCH

description: This work consists of two different experiments from the field of quantum foundations and quantum information. Both are based on an active feed- forward protocol [1], with which the path of individual photons in the experimental setup can be controlled. Since these two experiments were performed independently, both are briefly summarized in separate paragraphs.Maxwell’s demon is a thought experiment from 1867 in which a demon can lower the total entropy of two initially equalised thermal baths, without performing any work on the system [2]. The discussions that arose initially due to the apparent violation of the second law of thermodynamics have continued to this day. One of the reasons for this is that the thought experiment provides a direct link between quantum information processing and thermodynamics. In this work, we transferred the thought experiment into a photonic domain based on fiber optic components. Therefore, we use thermal states of light in place of thermal baths. This gives us access to new tools, like ultra fast optical switches and the ability to create more interesting states. Moreover, we have verified experimentally, that certain correlations between the thermal baths can tremendously enhance the ’power’ of Maxwell’s demon, while others eliminate his influence completely.The field of indefinite causal order in quantum mechanics has seen more and more interest in the past years, both theoretically [3] and experimen- tally [4]. In such processes, different parties act in a superposition of different orders. Since the first experimental realization of a process with an indefinite causal order, the quantum SWITCH, several protocols taking ad- vantage of this new resource have emerged. In previous experiments, the causal non-separability of two parties has been verified by measuring a so- called ’causal witness’ [5]. Nevertheless, the corresponding process matrix has only been evaluated theoretically. Here, we experimentally reconstruct the process matrix of a new passively-stable fiber-based architecture for the quantum SWITCH based on time-bin encoded qubits, which can readily be scaled to more parties. We perform a full characterization of this new type of quantum SWITCH by implementing causal process tomography for the first time. We then compare the tomography results to those obtained by directly measuring several different causal witnesses. Finally, we present the first measurement of the fidelity of our experimental quantum SWITCH to the ideal quantum SWITCH.
Optical phonons in new ordered perovskite Sr2Cu(Re0.69Ca0.31) Oy system observed by infrared reflectance spectroscopy
Creators: name: Ahmad, J.
name: Shizuya, M.
name: Isobe, M.
name: Alam, S.
name: Uwe, H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report infrared reflectivity spectra for a new correlated cupric oxide system Sr2Cu(Re0.69Ca0.31)Oy with y ~ 0.6 at several temperatures ranging between 8 and 380 K. The reflectivity spectrum at 300 K comprises of several optical phonons. A couple of residual bands located around 315 and 653 cm-1 exhibit exceptionally large intensity as compared to the other ones. The overall reflectivity spectrum lifts up slightly with increasing temperature. The energy and damping factor of transverse-optical phonons are determined by fitting the imaginary dielectric constant by Lorentz oscillator model and discussed as a function of temperature in terms of lattice anharmonicity.
description: 9 pages, 3 figures, presented at ISS2005, to appear in Physica C
VOYAGA YETMAGAN BOLALAR O'RTASIDA RO'Y BERAYOTGAN JINOYAT VA MUAMMOLARGA ADIKVAT YECHIMLAR
Creators: name: Toshmurodova, Elnoza
Publisher: name: Zenodo
Year: 2024

description: Maqolada bugungi kunda dolzarb muammolardan biri bo‘lgan o‘smir yoshlar o‘rtasida ko‘p sodir etilayotgan jinoyat, ilmsizlik va huquqiy tushunchalarning yetishmasligi kabi muammolar ko‘rib chiqiladi.  Uyishmagan yoshlarni birlashtirish, ularni ilim marifatga yo‘naltirish, huquiy tushunchalarni yetgazish to‘grisida chora tadbirlar  olib boriladi.
The properties of clusters, and the orientation of magnetic fields relative to filaments, in magnetohydrodynamic simulations of colliding clouds
Creators: name: Dobbs, C. L.
name: Wurster, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have performed Smoothed Particle Magneto-Hydrodynamics (SPMHD) calculations of colliding clouds to investigate the formation of massive stellar clusters, adopting a timestep criterion to prevent large divergence errors. We find that magnetic fields do not impede the formation of young massive clusters (YMCs), and the development of high star formation rates, although we do see a strong dependence of our results on the direction of the magnetic field. If the field is initially perpendicular to the collision, and sufficiently strong, we find that star formation is delayed, and the morphology of the resulting clusters is significantly altered. We relate this to the large amplification of the field with this initial orientation. We also see that filaments formed with this configuration are less dense. When the field is parallel to the collision, there is much less amplification of the field, dense filaments form, and the formation of clusters is similar to the purely hydrodynamical case. Our simulations reproduce the observed tendency for magnetic fields to be aligned perpendicularly to dense filaments, and parallel to low density filaments. Overall our results are in broad agreement with past work in this area using grid codes.
description: 13 pages, 9 figures
On the relation between radial alignment of dark matter subhalos and host mass in cosmological simulations
Creators: name: Knebe, Alexander
name: Draganova, Nadya
name: Power, Chris
name: Yepes, Gustavo
name: Hoffman, Yehuda
name: Gottloeber, Stefan
name: Gibson, Brad K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We explore the dependence of the radial alignment of subhalos on the mass of the host halo they orbit in. As the effect is seen on a broad range of scales including massive clusters as well as galactic systems it only appears natural to explore this phenomenon by means of cosmological simulations covering the same range in masses. We have 25 well resolved host dark matter halos at our disposal ranging from 10^15 Msun/h down to 10^12 Msun/h each consisting of order of a couple of million particles within the virial radius. We observe that subhalos tend to be more spherical than isolated objects. Both the distributions of sphericity and triaxiality of subhalos are Gaussian distributed with peak values of s approx. 0.80 and T approx. 0.56, irrespective of host mass. Interestingly we note that the radial alignment is independent of host halo mass and the distribution of \cosθ(i.e. the angle between the major axis E_a of each subhalo and the radius vector of the subhalo in the reference frame of the host) is well fitted by a simple power law P(\cosθ) proportional to \cos^4θwith the same fitting parameters for all host halos.
description: 5 pages, 2 figures. MNRAS Letter, in press
The Kerr theorem, Kerr-Schild formalizm and multiparticle Kerr-Schild solutions
Creators: name: Burinskii, Alexander
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider an extended version of the Kerr theorem incorporated in the Kerr-Schild formalism. It allows one to construct the series of exact solutions of the Einstein-Maxwell field equations from a holomorphic generating function $F$ of twistor variables. The exact multiparticle Kerr-Schild solutions are obtained from generating function of the form $F=\prod_i^k F_i, $ where $F_i$ are partial generating functions for the spinning particles $ i=1...k$. Gravitational and electromagnetic interaction of the spinning particles occurs via the light-like singular twistor lines. As a result, each spinning particle turns out to be `dressed' by singular pp-strings connecting it to other particles. Physical interpretation of this solution is discussed.
description: Brief version of hep-th/0510246. Plenary talk at the Intern. Conf. on Gravitation, Cosmology, Astrophysics and Nonstationary Gas Dynamics, dedicated to Prof. K.P. Staniukovich's 90th birthday, Moscow, 2-6 March 2006