cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Chaotic diffusion of the fundamental frequencies in the Solar System
Creators: name: Hoang, Nam H.
name: Mogavero, Federico
name: Laskar, Jacques
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The long-term variations in the orbit of the Earth govern the insolation on its surface and hence its climate. The use of the astronomical signal, whose imprint has been recovered in the geological records, has revolutionized the determination of the geological timescales. However, the orbital variations beyond 60 Myr cannot be reliably predicted because of the chaotic dynamics of the planetary orbits in the Solar System. Taking this dynamical uncertainty into account is necessary for a complete astronomical calibration of geological records. Our work addresses this problem with a statistical analysis of 120 000 orbital solutions of the secular model of the Solar System ranging from 500 Myr to 5 Gyr. We obtain the marginal probability density functions of the fundamental secular frequencies using kernel density estimation. The uncertainty of the density estimation is also obtained here in the form of confidence intervals determined by the moving block bootstrap method. The results of the secular model are shown to be in good agreement with those of the direct integrations of a comprehensive model of the Solar System. Application of our work is illustrated on two geological data sets: the Newark-Hartford records and the Libsack core.
description: Published in A&A, 18 pages, 14 figures. Included the corrigendum for misprints in the Table 2
Machine learning applied to single-shot x-ray diagnostics in an XFEL
Creators: name: Sanchez-Gonzalez, A.
name: Micaelli, P.
name: Olivier, C.
name: Barillot, T. R.
name: Ilchen, M.
name: Lutman, A. A.
name: Marinelli, A.
name: Maxwell, T.
name: Achner, A.
name: Agåker, M.
name: Berrah, N.
name: Bostedt, C.
name: Buck, J.
name: Bucksbaum, P. H.
name: Montero, S. Carron
name: Cooper, B.
name: Cryan, J. P.
name: Dong, M.
name: Feifel, R.
name: Frasinski, L. J.
name: Fukuzawa, H.
name: Galler, A.
name: Hartmann, G.
name: Hartmann, N.
name: Helml, W.
name: Johnson, A. S.
name: Knie, A.
name: Lindahl, A. O.
name: Liu, J.
name: Motomura, K.
name: Mucke, M.
name: O'Grady, C.
name: Rubensson, J-E.
name: Simpson, E. R.
name: Squibb, R. J.
name: Såthe, C.
name: Ueda, K.
name: Vacher, M.
name: Walke, D. J.
name: Zhaunerchyk, V.
name: Coffee, R. N.
name: Marangos, J. P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Accelerator Physics (physics.acc-ph)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: X-ray free-electron lasers (XFELs) are the only sources currently able to produce bright few-fs pulses with tunable photon energies from 100 eV to more than 10 keV. Due to the stochastic SASE operating principles and other technical issues the output pulses are subject to large fluctuations, making it necessary to characterize the x-ray pulses on every shot for data sorting purposes. We present a technique that applies machine learning tools to predict x-ray pulse properties using simple electron beam and x-ray parameters as input. Using this technique at the Linac Coherent Light Source (LCLS), we report mean errors below 0.3 eV for the prediction of the photon energy at 530 eV and below 1.6 fs for the prediction of the delay between two x-ray pulses. We also demonstrate spectral shape prediction with a mean agreement of 97%. This approach could potentially be used at the next generation of high-repetition-rate XFELs to provide accurate knowledge of complex x-ray pulses at the full repetition rate.
description: 12 pages, 8 figures
Cyclotron resonance overtones and near-field magnetoabsorption via terahertz Bernstein modes in graphene
Creators: name: Bandurin, D. A.
name: Mönch, E.
name: Kapralov, K.
name: Phinney, I. Y.
name: Lindner, K.
name: Liu, S.
name: Edgar, J. H.
name: Dmitriev, I. A.
name: Jarillo-Herrero, P.
name: Svintsov, D.
name: Ganichev, S. D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Two-dimensional electron systems subjected to a perpendicular magnetic field absorb electromagnetic radiation via the cyclotron resonance (CR). Here we report a qualitative breach of this well-known behaviour in graphene. Our study of the terahertz photoresponse reveals a resonant burst at the main overtone of the CR, drastically exceeding the signal detected at the position of the ordinary CR. In accordance with the developed theory, the photoresponse dependencies on the magnetic field, doping level, and sample geometry suggest that the origin of this anomaly lies in the near-field magnetoabsorption facilitated by the Bernstein modes, ultra-slow magnetoplasmonic excitations reshaped by nonlocal electron dynamics. Close to the CR harmonics, these modes are characterized by a flat dispersion and a diverging plasmonic density of states that strongly amplifies the radiation absorption. Besides fundamental interest, our experimental results and developed theory show that the radiation absorption via nonlocal collective modes can facilitate a strong photoresponse, a behaviour potentially useful for infrared and terahertz technology.
description: 27 pages, 22 figures
On slowly rotating axisymmetric solutions of the Euler-Poisson equations
Creators: name: Jang, Juhi
name: Makino, Tetu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q35, 35Q85, 35J61, 45G10, 76D05

description: We construct stationary axisymmetric solutions of the Euler-Poisson equations, which govern the internal structure of polytropic gaseous stars, with small constant angular velocity when the adiabatic exponent $γ$ belongs to $(\frac65,\frac32]$. The problem is formulated as a nonlinear integral equation, and is solved by iteration technique. By this method, not only we get the existence, but also we clarify properties of the solutions such as the physical vacuum condition and oblateness of the star surface.
Multiplication operators on Orlicz and weighted Orlicz spaces
Creators: name: Giri, Ratan Kumar
name: Pradhan, Shesadev
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47B38, 46E30

description: Let $(Ω,Σ,μ)$ be a $σ$-finite complete measure space, $τ:Ω\rightarrowΩ$ be a measurable transformation and $ϕ$ be an Orlicz function. In this article, first a necessary and sufficient condition for the bounded multiplication operator $M_u$ on Orlicz space $L^ϕ(Ω)$ induced by measurable function $u$ to be completely continuous has been established. Next by using Radon-Nikodym derivative $ω= \frac{d μ\circ τ^{-1}}{d μ}$, the multiplication operator $M_u$ on weighted Orlicz space $L^ϕ_ω(Ω)$ have been characterized.
A combination strategy of structure-based virtual screening, MM-GBSA, cross docking, molecular dynamics and metadynamics simulations used to investigate natural compounds as potent and specific inhibitors of tumor linked human carbonic anhydrase IX
Creators: name: Chahal, Varun
name: Kakkar, Rita
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
classificationCode: 39999
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: Cancer remains a serious health concern representing one of the leading causes of deaths worldwide. The enzyme human carbonic anhydrase IX (hCA IX) is found to be over-expressed in many cancer types and its selective inhibition over its cytosolic off-target isoform, human carbonic anhydrase II (hCA II), represents a potential area of research in the development of novel anticancer compounds. This work is concerned with the use of various in silico tools for the identification of natural product based molecules that can selectively inhibit hCA IX over hCA II. MM-GBSA assisted structure-based virtual screening against hCA IX was performed for nearly 225,000 natural products imported from the ZINC15 database. The obtained hits were checked for their potency by considering acetazolamide, the bound inhibitor of hCA IX, as the reference molecule, and 121 molecules were identified as potent hCA IX inhibitors. After ensuring their potency, cross-docking, followed by MM-GBSA calculations of the hits with hCA II, was performed, and their selectivity was assessed by considering the hCA IX selective compound SLC-0111 as the reference molecule, and 50 natural products were identified as potent as well as selective hCA IX inhibitors. Molecules with the quinoline scaffold showed the highest selectivity, and their selectivity was attributed to the strong electrostatic interactions of the zinc binding group (ZBG) with the active site Zn(II) ion. Furthermore, the stability of the binding modes of the top hCA IX selective hits was ensured by performing molecular dynamics (MD) simulations, which clearly proved that one of the short-listed molecules is truly selective, as it does not interact with the active site Zn(II) ion of hCA II, but interacts strongly with this ion in hCA IX. Bonding pose metadynamics studies revealed that the ligand moves to a more stable binding site from the one predicted by the docking studies and shows stronger interaction with the protein and Zn(II) at this binding site. The ligand is not likely to have issues with bioavailability. As a result, this ligand can be taken for bioassay testing and subsequently used as a feasible therapeutic treatment for a variety of cancer types. Communicated by Ramaswamy H. Sarma
A quic(k) security overview: a literature research on implemented security recommendations
Creators: name: Tatschner, Stefan
name: N. Peters, Sebastian
name: Emeis, David
name: Morris, John
name: NEWE, THOMAS
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 40
subject: Engineering

description: Built on top of UDP, the relatively new QUIC protocol serves as the baseline for modern web protocol stacks. Equipped with a rich feature set, the protocol is defined by a 151 pages strong IETF standard complemented by several additional documents. Enabling fast updates and feature iteration, most QUIC implementations are implemented as user space libraries leading to a large and fragmented ecosystem. This work addresses the research question, “if a complex standard with a large number of different implementations leads to an insecure ecosystem?”. The relevant RFC documents were studied and “Security Consideration” items describing conceptional problems were extracted. During the research, 13 popular production ready QUIC implementations were compared by evaluating 10 security considerations from RFC9000. While related studies mostly focused on the functional part of QUIC, this study confirms that available QUIC implementations are not yet mature enough from a security point of view.
Ultrathin Complementary Metasurface for Orbital Angular Momentum Generation at Microwave Frequencies
Creators: name: Chen, Menglin L. N.
name: Jiang, Li Jun
name: Sha, Wei E. I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Physics (physics.class-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Electromagnetic (EM) waves with helical wavefront carry orbital angular momentum (OAM), which is associated with the azimuthal phase of the complex electric field. OAM is a new degree of freedom in EM waves and is promising for channel multiplexing in communication system. Although the OAM-carrying EM wave attracts more and more attention, the method of OAM generation at microwave frequencies still faces challenges, such as efficiency and simulation time. In this work, by using the circuit theory and equivalence principle, we build two simplified models, one for a single scatter and one for the whole metasurface to predict their EM responses. Both of the models significantly simplify the design procedure and reduce the simulation time. In this paper, we propose an ultrathin complementary metasurface that converts a left-handed (right-handed) circularly polarized plane wave without OAM to a right-handed (left-handed) circularly polarized wave with OAM of arbitrary orders and a high transmission efficiency can be achieved.
description: 6 pages, 9 figures
Intermediate magnetisation state and competing orders in Dy$_2$Ti$_2$O$_7$ and Ho$_2$Ti$_2$O$_7$
Creators: name: Borzi, R. A.
name: Albarracín, F. A. Gómez
name: Rosales, H. D.
name: Rossini, G. L.
name: Steppke, A.
name: Prabhakaran, D.
name: Mackenzie, A. P.
name: Cabra, D. C.
name: Grigera, S. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Among the frustrated magnetic materials, spin-ice stands out as a particularly interesting system. Residual entropy, freezing and glassiness, Kasteleyn transitions and fractionalisation of excitations in three dimensions all stem from a simple classical Hamiltonian. But is the usual spin-ice Hamiltonian a correct description of the experimental systems? Here we address this issue by measuring magnetic susceptibility in the two most studied spin-ice compounds, Dy$_2$Ti$_2$O$_7$ and Ho$_2$Ti$_2$O$_7$, using a vector magnet. Using these results, and guided by a theoretical analysis of possible distortions to the pyrochlore lattice, we construct an effective Hamiltonian and explore it using Monte Carlo simulations. We show how this Hamiltonian reproduces the experimental results, including the formation of a phase of intermediate polarisation, and gives important information about the possible ground-state of real spin-ice systems. Our work suggests an unusual situation in which distortions might contribute to the preservation rather than relief of the effects of frustration.
description: 27 pages, 8 figures, including supplementary information, accepted for publication in Nature Communications
The implications for welfare of varying degrees of capital mobility and the possibility of a non-zero optimal tariff for a small open economy in a dynamic CGE model
Creators: name: Mavromatis, Peter George.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
A note on measures vanishing at infinity
Creators: name: Spindeler, Timo
name: Strungaru, Nicolae
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 43A25, 52C23

description: In this paper, we review the basic properties of measures vanishing at infinity and prove a version of the Riemann--Lebesgue lemma for Fourier transformable measures.
description: 18 pages
Studying the evolution of AGB stars in the Gaia epoch
Creators: name: Di Criscienzo, M.
name: Ventura, P.
name: Garcia-Hernandez, D. A.
name: Dell'Agli, F.
name: Castellani, M.
name: Marrese, P. M.
name: Marinoni, S.
name: Giuffrida, G.
name: Zamora, O.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present asymptotic giant branch (AGB) models of solar metallicity, to allow the interpretation of observations of Galactic AGB stars, whose distances should be soon available after the first release of the Gaia catalogue. We find an abrupt change in the AGB physical and chemical properties, occurring at the threshold mass to ignite hot bottom burning,i.e. $3.5M_{\odot}$. Stars with mass below $3.5 M_{\odot}$ reach the C-star stage and eject into the interstellar medium gas enriched in carbon , nitrogen and $^{17}O$. The higher mass counterparts evolve at large luminosities, between $3\times 10^4 L_{\odot}$ and $10^5 L_{\odot}$. The mass expelled from the massive AGB stars shows the imprinting of proton-capture nucleosynthesis, with considerable production of nitrogen and sodium and destruction of $^{12}C$ and $^{18}O$. The comparison with the most recent results from other research groups are discussed, to evaluate the robustness of the present findings. Finally, we compare the models with recent observations of galactic AGB stars, outlining the possibility offered by Gaia to shed new light on the evolution properties of this class of objects.
description: 21 pages, 11 figure, 3 tables, accepted for publication in MNRAS (2016 July 11)
title: The Spaciotemporal Vortex Model: Toward a Physically Grounded Framework for Cyclic Time and Energy Transitions and Tile as a layered fourth spatial dimension emerging from a novel ontological Model of everything
title: With Source files as zip archive file
titleType: Subtitle
Creators: name: Resch, Jeremy Erich
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Physics
subject: Physics
subject: Mathematical physics
subject: Laser physics
subject: Physics/standards
subject: Theoretical physics
subject: Ontologic Theory
subject: Time
subject: Gravity
subject: Gravitation
subject: Gravitational waves
subject: 4D
subject: fourth spacial dimension
subject: Spaciotemporal Dimension
subject: Big Crunch
subject: Big bang
subject: Big Bang
subject: Big Bounce
subject: Cyclical Universe
subject: Cyclical Time

description: The Spaciotemporal Vortex Model:

Toward a Physically Grounded Framework for Cyclic Time and Energy Transitions

Spaciotemporal Vortex Model (SVM) offers a physically grounded framework in that time is

reinterpreted as a  fourth spatial dimension. Temporal evolution results from energy transitions between discrete temporal layers.

Unlike conventional cosmological models, that treat ime as a continuous linear axis and fail to address the low-entropy initial state, arrow of time, or dark phenomena, SVM introduces a novel mechanism inherently emerging ruleset that successfully adresses them.

This reinterpretation provides a thermodynamically coherent basis for cyclic cosmological dynamics, entropy management, and information encoding via curvature.

The model derives formal evolution laws, thermodynamic couplings, and quantization paths, offering multiple empirical implications for entropy collapse, dark energy behavior, and curvature-entropy correspondence.

 

For Correspondence:

 

jer.code.contact@gmail.com
description: Please keep in mind that because i am not a professional scientist and don't have to much Experience in using LaTeX the PDF might still have errors or formmating problems.
The Spaciotemporal Vortex Model: Toward a Physically Grounded Framework for Cyclic Time and Energy Transitions and Tile as a layered fourth spatial dimension emerging from a novel ontological Model of everything
Creators: name: Resch, Jeremy Erich
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Physics
subject: Physics
subject: Mathematical physics
subject: Laser physics
subject: Physics/standards
subject: Theoretical physics
subject: Ontologic Theory
subject: Time
subject: Gravity
subject: Gravitation
subject: Gravitational waves
subject: 4D
subject: fourth spacial dimension
subject: Spaciotemporal Dimension
subject: Big Crunch
subject: Big bang
subject: Big Bang
subject: Big Bounce
subject: Cyclical Universe
subject: Cyclical Time

description: The Spaciotemporal Vortex Model:

Toward a Physically Grounded Framework for Cyclic Time and Energy Transitions

Spaciotemporal Vortex Model (SVM) offers a physically grounded framework in that time is

reinterpreted as a  fourth spatial dimension. Temporal evolution results from energy transitions between discrete temporal layers.

Unlike conventional cosmological models, that treat ime as a continuous linear axis and fail to address the low-entropy initial state, arrow of time, or dark phenomena, SVM introduces a novel mechanism inherently emerging ruleset that successfully adresses them.

This reinterpretation provides a thermodynamically coherent basis for cyclic cosmological dynamics, entropy management, and information encoding via curvature.

The model derives formal evolution laws, thermodynamic couplings, and quantization paths, offering multiple empirical implications for entropy collapse, dark energy behavior, and curvature-entropy correspondence.
description: Please keep in mind that because i am not a professional scientist and don't have to much Experience in using LaTeX the PDF might still have errors or formmating problems.
Promising disruptors of p53-MDM2 dimerization from some medicinal plant phytochemicals: a molecular modeling study
Creators: name: Oyedele, Abdul-Quddus Kehinde
name: Adelusi, Temitope Isaac
name: Ogunlana, Abdeen Tunde
name: Ayoola, Mojeed Ashiru
name: Adeyemi, Rofiat Oluwabusola
name: Babalola, Musa Oladayo
name: Ayorinde, James Babatunde
name: Isong, Josiah Ayoola
name: Ajasa, Toheeb Olakunle
name: Boyenle, Ibrahim Damilare
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
classificationCode: 39999
subject: Chemical Sciences not elsewhere classified
subject: Cancer

description: Cancer is a major global health issue that has a high mortality rate. p53, which functions as a tumor suppressor, is critical in preventing tumor development by regulating the cell cycle and inducing apoptosis in damaged cells. However, the tumor suppressor function of p53 is effectively inhibited by its direct interaction with the hydrophobic cleft of MDM2 protein via multiple mechanisms As a result, restoring p53 activity by blocking the p53-MDM2 protein-protein interaction has been proposed as a compelling therapeutic strategy for cancer treatment. The use of molecular docking and phytochemical screening procedures are appraised to inhibit MDM2's hydrophobic cleft and disrupt the p53-MDM2 interaction. For this purpose, a library of 51 bioactive compounds from 10 medicinal plants was compiled and subjected to structure-based virtual screening. Out of these, only 3 compounds (Atalantoflavone, Cudraxanthone 1, and Ursolic acid) emerged as promising inhibitors of MDM2-p53 based on their binding affinities (-9.1 kcal/mol, −8.8 kcal/mol, and −8.8 kcal/mol respectively) when compared to the standard (-8.8 kcal/mol). Moreover, these compounds showed better pharmacokinetic and drug-like profiling than the standard inhibitor (Chromonotriazolopyrimidine 1). Finally, the 100 ns MD simulation analysis confirmed no significant perturbation in the conformational dynamics of the simulated binary complexes when compared to the standard. In particular, Ursolic acid was found to satisfy the molecular enumeration the most compared to the other inhibitors. Our overall molecular modeling finding shows why these compounds may emerge as potent arsenals for cancer therapeutics. Nonetheless, extensive experimental and clinical research is needed to augment their use in clinics. Communicated by Ramaswamy H. Sarma
An Automated System for Essay Scoring of Online Exams in Arabic based on Stemming Techniques and Levenshtein Edit Operations
Creators: name: Al-Shalabi, Emad Fawzi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Retrieval (cs.IR)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: In this article, an automated system is proposed for essay scoring in Arabic language for online exams based on stemming techniques and Levenshtein edit operations. An online exam has been developed on the proposed mechanisms, exploiting the capabilities of light and heavy stemming. The implemented online grading system has shown to be an efficient tool for automated scoring of essay questions.
description: 5 pages, 2 figures
Volatility models implied by currency option prices
Creators: name: Rajendran, Shangitha.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
title: The Spaciotemporal Vortex Model: Toward a Physically Grounded Framework for Cyclic Time and Energy Transitions and Tile as a layered fourth spatial dimension emerging from a novel ontological Model of everything
title: With Source files as zip archive file
titleType: Subtitle
Creators: name: Resch, Jeremy Erich
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Physics
subject: Physics
subject: Mathematical physics
subject: Laser physics
subject: Physics/standards
subject: Theoretical physics
subject: Ontologic Theory
subject: Time
subject: Gravity
subject: Gravitation
subject: Gravitational waves
subject: 4D
subject: fourth spacial dimension
subject: Spaciotemporal Dimension
subject: Big Crunch
subject: Big bang
subject: Big Bang
subject: Big Bounce
subject: Cyclical Universe
subject: Cyclical Time

description: The Spaciotemporal Vortex Model:

Toward a Physically Grounded Framework for Cyclic Time and Energy Transitions

Spaciotemporal Vortex Model (SVM) offers a physically grounded framework in that time is

reinterpreted as a  fourth spatial dimension. Temporal evolution results from energy transitions between discrete temporal layers.

Unlike conventional cosmological models, that treat ime as a continuous linear axis and fail to address the low-entropy initial state, arrow of time, or dark phenomena, SVM introduces a novel mechanism inherently emerging ruleset that successfully adresses them.

This reinterpretation provides a thermodynamically coherent basis for cyclic cosmological dynamics, entropy management, and information encoding via curvature.

The model derives formal evolution laws, thermodynamic couplings, and quantization paths, offering multiple empirical implications for entropy collapse, dark energy behavior, and curvature-entropy correspondence.
description: Please keep in mind that because i am not a professional scientist and don't have to much Experience in using LaTeX the PDF might still have errors or formmating problems.
Multiple resonances of a moving, oscillating surface disturbance on a shear current
Creators: name: Li, Yan
name: Ellingsen, Simen Å.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We consider waves radiated by a disturbance of oscillating strength moving at constant velocity along the free surface of a shear flow which, when undisturbed, has uniform horizontal vorticity of magnitude $S$. When no current is present the problem is a classical one and much studied, and in deep water a resonance is known to occur when $τ=|\boldsymbol{V}|ω_0/g$ equals the critical value $1/4$ ($\boldsymbol{V}$: velocity of disturbance, $ω_0$: oscillation frequency, $g$: gravitational acceleration). We show that the presence of the sub-surface shear current can change this picture radically. Not only does the resonant value of $τ$ depend strongly on the angle between $\boldsymbol{V}$ and the current's direction and the "shear-Froude number" $\mathrm{Frs}=|\boldsymbol{V}|S/g$; when $\mathrm{Frs}>1/3$, multiple resonant values --- as many as $4$ --- can occur for some directions of motion. At sufficiently large values of $\mathrm{Frs}$, the smallest resonance frequency tends to zero, representing the phenomenon of critical velocity for ship waves. We provide a detailed analysis of the dispersion relation for the moving, oscillating disturbance, in both finite and infinite water depth, including for the latter case an overview of the different far-field waves which exist in different sectors of wave vector space under different conditions. Owing to the large number of parameters, a detailed discussion of the structure of resonances is provided for infinite depth only, where analytical results are available.
description: 21 pages, 12 figures, submitted to J. Fluid Mech
Automatic Conversion of Relational Databases into Ontologies: A Comparative Analysis of Protégé Plug-ins Performances
Creators: name: Mogotlane, Kgotatso Desmond
name: Fonou-Dombeu, Jean Vincent
Publisher: name: arXiv
Year: 2016
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Constructing ontologies from relational databases is an active research topic in the Semantic Web domain. While conceptual mapping rules/principles of relational databases and ontology structures are being proposed, several software modules or plug-ins are being developed to enable the automatic conversion of relational databases into ontologies. However, the correlation between the resulting ontologies built automatically with plug-ins from relational databases and the database-to-ontology mapping principles has been given little attention. This study reviews and applies two Protégé plug-ins, namely, DataMaster and OntoBase to automatically construct ontologies from a relational database. The resulting ontologies are further analysed to match their structures against the database-to-ontology mapping principles. A comparative analysis of the matching results reveals that OntoBase outperforms DataMaster in applying the database-to-ontology mapping principles for automatically converting relational databases into ontologies.
description: 7(3/4):21-40
A Stringent Limit on the Warm Dark Matter Particle Masses from the Abundance of z=6 Galaxies in the Hubble Frontier Fields
Creators: name: Menci, N.
name: Grazian, A.
name: Castellano, M.
name: Sanchez, N. G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that the recently measured UV luminosity functions of ultra-faint lensed galaxies at z= 6 in the Hubble Frontier Fields provide an unprecedented probe for the mass m_X of the Warm Dark Matter candidates independent of baryonic physics. Comparing the measured abundance of the faintest galaxies with the maximum number density of dark matter halos in WDM cosmologies sets a robust limit m_X> 2.9 keV for the mass of thermal relic WDM particles at a 1-sigma confidence level, m_X> 2.4 keV at 2-sigma, and m_X> 2.1 keV at 3-sigma. These constitute the tightest constraints on WDM particle mass derived to date independently of the baryonic physics involved in galaxy formation. We discuss the impact of our results on the production mechanism of sterile neutrinos. In particular, if sterile neutrinos are responsible for the 3.5 keV line reported in observations of X-ray clusters, our results firmly rule out the Dodelson-Widrow production mechanism, and yield m_{sterile}> 6.1 keV for sterile neutrinos produced via the Shi-Fuller mechanism.
description: Accepted for publication in ApJL, 7 pages
Machine-Learning-Derived Entanglement Witnesses
Creators: name: Greenwood, Alexander C. B.
name: Wu, Larry T. H.
name: Zhu, Eric Y.
name: Kirby, Brian T.
name: Qian, Li
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work, we show a correspondence between linear support vector machines (SVMs) and entanglement witnesses, and use this correspondence to generate entanglement witnesses for bipartite and tripartite qubit (and qudit) target entangled states. An SVM allows for the construction of a hyperplane that clearly delineates between separable states and the target entangled state; this hyperplane is a weighted sum of observables ('features') whose coefficients are optimized during the training of the SVM. We demonstrate with this method the ability to obtain witnesses that require only local measurements even when the target state is a non-stabilizer state. Furthermore, we show that SVMs are flexible enough to allow us to rank features, and to reduce the number of features systematically while bounding the inference error. This allows us to derive W state witnesses capable of detecting entanglement with fewer measurement terms than the fidelity method dominant in today's literature. The utility of this approach is demonstrated on quantum hardware furnished through the IBM Quantum Experience.
description: 11 pages
A molecular dynamics investigation of N-glycosylation effects on T-cell receptor kinetics
Creators: name: Rollins, Zachary
name: Harris, Bradley
name: George, Steven
name: Faller, Roland
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
classificationCode: 39999
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
subject: Computational Biology

description: The binding interaction between the T-cell receptor (TCR) and peptide-major histocompatibility complex (pMHC) is modulated by several factors (known and unknown), however, investigations into effects of glycosylation are limited. A fully glycosylated computational model of the TCR bound to the pMHC is developed to investigate the effects of glycosylation on dissociation kinetics from the pMHC. Here, we examine the effects of N-glycosylation on TCR-pMHC bond strength using steered molecular dynamic simulations. N-glycosylation is a post-translational modification that adds sugar moieties to molecules and can modulate the activity of several immune molecules. Using a TCR-pMHC pair found in melanoma as a case study, our study demonstrates that N-glycosylation of the TCR-pMHC alters the proteins’ conformation; increases the bond lifetime; and increases the number of hydrogen bonds and Lennard-Jones Contacts involved in the TCR-pMHC bond. We find that weak glycan-protein or glycan-glycan interactions impact the equilibrated structure of the TCR and pMHC leading to an increase in the overall bond strength of the TCR-pMHC complex including the duration and energetic strength under constant load. These results indicate that N-glycosylation plays an important role in the TCR-pMHC bond and should be considered in future computational and experimental studies. Communicated by Ramaswamy H. Sarma
Broadband cloaking for flexural waves
Creators: name: Zareei, Ahmad
name: Alam, Mohammad-Reza
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The governing equation for elastic waves in flexural plates is not form invariant, and hence designing a cloak for such waves faces a major challenge. Here, we present the design of a perfect broadband cloak for flexural waves through the use of a nonlinear transformation, and by matching term-by-term the original and transformed equations. For a readily achievable flexural cloak in a physical setting, we further present an approximate adoption of our perfect cloak under more restrictive physical constraints. Through direct simulation of the governing equations, we show that this cloak, as well, maintains a consistently high cloaking efficiency over a broad range of frequencies. The methodology developed here may be used for steering waves and designing cloaks in other physical systems with non form-invariant governing equations.
A pressure tensor description for the time-resonant Weibel instability
Creators: name: Sarrat, M.
name: Del Sarto, D.
name: Ghizzo, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We discuss a fluid model with inclusion of the complete pressure tensor dynamics for the description of Weibel type instabilities in a counterstreaming beams configuration. Differently from the case recently studied in Sarrat et al. 2016, where perturbations perpendicular to the beams were considered, here we focus only on modes propagating along the beams. Such a configuration is responsible for the growth of two kind of instabilities, the Two-Stream Instability and the Weibel instability, which in this geometry becomes "time-resonant", i.e. propagative. This fluid description agrees with the kinetic one and makes it possible e.g. to identify the transition between non-propagative and propagative Weibel modes, already evidenced by Lazar et al. 2009 as a "slope-breaking" of the growth rate, in terms of a merger of two non propagative Weibel modes.
description: The old title has been replaced in order to avoid confusion between time and spatial resonances. This paper deals with the Time Resonant Weibel Instability
A thesis on entrepreneurial theory : an investigation of entrepreneurial theory within an uncertain framework
Creators: name: Spong, Heath David.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Efficient nonparametric estimation of the covariate-adjusted threshold-response function, a support-restricted stochastic intervention
Creators: name: van der Laan, Lars
name: Zhang, Wenbo
name: Gilbert, Peter B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Identifying a biomarker or treatment-dose threshold that marks a specified level of risk is an important problem, especially in clinical trials. This risk, viewed as a function of thresholds and possibly adjusted for covariates, we call the threshold-response function. Extending the work of Donovan, Hudgens and Gilbert (2019), we propose a nonparametric efficient estimator for the covariate-adjusted threshold-response function, which utilizes machine learning and Targeted Minimum-Loss Estimation (TMLE). We additionally propose a more general estimator, based on sequential regression, that also applies when there is outcome missingness. We show that the threshold-response for a given threshold may be viewed as the expected outcome under a stochastic intervention where all participants are given a treatment dose above the threshold. We prove the estimator is efficient and characterize its asymptotic distribution. A method to construct simultaneous 95% confidence bands for the threshold-response function and its inverse is given. Furthermore, we discuss how to adjust our estimator when the treatment or biomarker is missing-at-random, as is the case in clinical trials with biased sampling designs, using inverse-probability-weighting. The methods are assessed in a diverse set of simulation settings with rare outcomes and cumulative case-control sampling. The methods are employed to estimate neutralizing antibody thresholds for virologically confirmed dengue risk in the CYD14 and CYD15 dengue vaccine trials.
description: 51 pages including supplement, 7 figures, 1 table
Computational insight into the binding of bryostatin 1 with ferritin: implication of natural compounds in Alzheimer’s disease therapeutics
Creators: name: Shahwan, Moyad
name: Alhumaydhi, Fahad A.
name: Sharaf, Sharaf E.
name: Alghamdi, Badrah S.
name: Baeesa, Saleh
name: Tayeb, Haythum O.
name: Ashraf, Ghulam Md
name: Shamsi, Anas
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Biotechnology
classificationCode: 39999
subject: Chemical Sciences not elsewhere classified
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
subject: Hematology

description: Neuronal damage in iron-sensitive brain regions occurs as a result of iron dyshomeostasis. Increased iron levels and iron-related pathogenic triggers are associated with neurodegenerative diseases, including Alzheimer’s disease (AD). Ferritin is a key player involved in iron homeostasis. Major pathological hallmarks of AD are amyloid plaques, neurofibrillary tangles (NFTs) and synaptic loss that lead to cognitive dysfunction and memory loss. Natural compounds persist in being the most excellent molecules in the area of drug discovery because of their different range of therapeutic applications. Bryostatins are naturally occurring macrocyclic lactones that can be implicated in AD therapeutics. Among them, Bryostatin 1 regulates protein kinase C, a crucial player in AD pathophysiology, thus highlighting the importance of bryostatin 1 in AD management. Thus, this study explores the binding mechanism of Bryotstain 1 with ferritin. In this work, the molecular docking calculations revealed that bryostatin 1 has an appreciable binding potential towards ferritin by forming stable hydrogen bonds (H-bonds). Molecular dynamics simulation studies deciphered the binding mechanism and conformational dynamics of ferrritin–bryostatin 1 system. The analyses of root mean square deviation, root mean square fluctuations, Rg, solvent accessible surface area, H-bonds and principal component analysis revealed the stability of the ferritin–bryostatin 1 docked complex throughout the trajectory of 100 ns. Moreover, the free energy landscape analysis advocated that the ferritin–bryostatin 1 complex stabilized to the global minimum. Altogether, the present work delineated the binding of bryostatin 1 with ferritin that can be implicated in the management of AD. Communicated by Ramaswamy H. Sarma
Tax policy in a rent seeking market : taxing wine in Australia
Creators: name: McDonald, Jason.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
The white dwarf luminosity function
Creators: name: García-Berro, Enrique
name: Oswalt, Terry D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: White dwarfs are the final remnants of low- and intermediate-mass stars. Their evolution is essentially a cooling process that lasts for $\sim 10$ Gyr. Their observed properties provide information about the history of the Galaxy, its dark matter content and a host of other interesting astrophysical problems. Examples of these include an independent determination of the past history of the local star formation rate, identification of the objects responsible for the reported microlensing events, constraints on the rate of change of the gravitational constant, and upper limits to the mass of weakly interacting massive particles. To carry on these tasks the essential observational tools are the luminosity and mass functions of white dwarfs, whereas the theoretical tools are the evolutionary sequences of white dwarf progenitors, and the corresponding white dwarf cooling sequences. In particular, the observed white dwarf luminosity function is the key manifestation of the white dwarf cooling theory, although other relevant ingredients are needed to compare theory and observations. In this review we summarize the recent attempts to empirically determine the white dwarf luminosity function for the different Galactic populations. We also discuss the biases that may affect its interpretation. Finally, we elaborate on the theoretical ingredients needed to model the white dwarf luminosity function, paying special attention to the remaining uncertainties, and we comment on some applications of the white dwarf cooling theory. Astrophysical problems for which white dwarf stars may provide useful leverage in the near future are also discussed.
description: Accepted for publication in New Astronomy Reviews, 3 August 2016
Dynamical role of Polyakov loops in the QCD thermodynamics
Creators: name: Agasian, N. O.
name: Lukashov, M. S.
name: Simonov, Yu. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Polyakov loops $L_a(T), a=3,8,...$ are shown to give the most important nonperturbative contribution to the thermodynamic potentials. Derived from the gluonic field correlators they enter as factors into free energy. It is shown in the $SU(3)$ case that $L_a (T)$ define to a large extent the behavior of the free energy and the trace anomaly $I(T)$, most sensitive to nonperturbative effects.
description: 8 pages, 2 figures; v2: minor corrections, style changed and references added
Extended Bose-Einstein condensate dark matter in viscous Gauss-Bonnet gravity
Creators: name: Mahichi, E.
name: Amani, Alireza
name: Ramzanpour, M. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: In this paper, we study the $F(R, G)$ gravity model with an interacting model by flat-FRW metric in a viscous fluid. We consider that the universe dominates with components of dark matter and dark energy. This means that the dark matter component derives from Extended Bose-Einstein Condensate (EBEC) and the components of dark energy arise from the $F(R, G)$ gravity. After obtaining the Einstein equation, the energy density and the pressure of dark energy are written in terms of the geometries of the curvature and the Gauss-Bonnet terms, and components of dark matter and viscous fluid. Also, the corresponding continuity equations are written with the presence of interaction terms. In what follows, we employ the EBEC regime instead of the normal dark matter by the dark matter Equation of State (EoS) as $p_{dm} = αρ_{dm} + βρ_{dm}^2$, which arises from the gravitational form. The EoS can be expressed from the perspective of the virial expansion, in which the first and second terms represent normal dark matter and quantum ground state. Next, the corresponding Friedmann equations reconstruct in terms of the redshift parameter, then by using the scenario of the power-law cosmology for the scale factor, we fit the present model with the Hubble amounts of 51 supernova data by the likelihood analysis. In that case, we acquire the cosmological parameters of dark energy in terms of the redshift parameter, and by plotting these graphs, we see that the universe is currently undergoing an accelerated expansion phase. Finally, we investigate the stability of the present model with the sound speed parameter.
description: 22 pages, 5 figures
Splice Graphs and Their Topological Indices
Creators: name: Sharafdini, Reza
name: Gutman, Ivan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Let $G_1=(V_1,E_1)$ and $G_2=(V_2,E_2)$ be two graphs with disjoint vertex sets $V_1$ and $V_2$. Let $u_1 \in V_1$ and $u_2 \in V_2$. A splice of $G_1$ and $G_2$ by vertices $u_1$ and $u_2$, $\mathcal{S}(G_1,G_2;u_1,u_2)$, is defined by identifying the vertices $u_1$ and $u_2$ in the union of $G_1$ and $G_2$. In this paper we calculate the Szeged, edge-Szeged, $PI$, vertex-$PI$ and eccentric connectivity indices of splice graphs.