cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The MASSIVE Survey - VII. The Relationship of Angular Momentum, Stellar Mass and Environment of Early-Type Galaxies
Creators: name: Veale, Melanie
name: Ma, Chung-Pei
name: Greene, Jenny E.
name: Thomas, Jens
name: Blakeslee, John P.
name: McConnell, Nicholas
name: Walsh, Jonelle L.
name: Ito, Jennifer
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We analyse the environmental properties of 370 local early-type galaxies (ETGs) in the MASSIVE and ATLAS3D surveys, two complementary volume-limited integral-field spectroscopic (IFS) galaxy surveys spanning absolute $K$-band magnitude $-21.5 > M_K > -26.6$, or stellar mass $8 \times 10^{9} < M_* < 2 \times 10^{12} M_\odot$. We find these galaxies to reside in a diverse range of environments measured by four methods: group membership (whether a galaxy is a brightest group/cluster galaxy, satellite, or isolated), halo mass, large-scale mass density (measured over a few Mpc), and local mass density (measured within the $N$th neighbour). The spatially resolved IFS stellar kinematics provide robust measurements of the spin parameter $λ_e$ and enable us to examine the relationship among $λ_e$, $M_*$, and galaxy environment. We find a strong correlation between $λ_e$ and $M_*$, where the average $λ_e$ decreases from $\sim 0.4$ to below 0.1 with increasing mass, and the fraction of slow rotators $f_{\rm slow}$ increases from $\sim 10$% to 90%. We show for the first time that at fixed $M_*$, there are almost no trends between galaxy spin and environment; the apparent kinematic morphology-density relation for ETGs is therefore primarily driven by $M_*$ and is accounted for by the joint correlations between $M_*$ and spin, and between $M_*$ and environment. A possible exception is that the increased $f_{\rm slow}$ at high local density is slightly more than expected based only on these joint correlations. Our results suggest that the physical processes responsible for building up the present-day stellar masses of massive galaxies are also very efficient at reducing their spin, in any environment.
description: Accepted to MNRAS
Cosmological solutions and finite time singularities in Finslerian geometry
Creators: name: Paul, Nupur
name: De, S. S.
name: Rahaman, Farook
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider a very general scenario of our universe where its geometry is characterized by the Finslerian structure on the underlying spacetime manifold, a generalization of the Riemannian geometry. Now considering a general energy-momentum tensor for matter sector, we derive the gravitational field equations in such spacetime. Further, to depict the cosmological dynamics in such spacetime proposing an interesting equation of state identified by a sole parameter $γ$ which for isotropic limit is simply the barotropic equation of state $p= (γ- 1) ρ$ ($γ\in \mathbb{R}$ being the barotropic index), we solve the background dynamics. The dynamics offers several possibilities depending on this sole parameter as follows $-$ (i) only an exponential expansion, or (ii) a finite time past singualrity (big bang) with late accelerating phase, or (iii) a nonsingular universe exhibiting an accelerating scenario at late time which finally predicts a big rip type singularity. We also discuss several energy conditions and the possibility of cosmic bounce. Finally, we establish the first law of thermodynamics in such spacetime.
description: Accepted in Mod.Phys.Lett.A
Identifiability and parameter estimation of the single particle lithium-ion battery model
Creators: name: Bizeray, Adrien M.
name: Kim, Jin-Ho
name: Duncan, Stephen R.
name: Howey, David A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper investigates the identifiability and estimation of the parameters of the single particle model (SPM) for lithium-ion battery simulation. Identifiability is addressed both in principle and in practice. The approach begins by grouping parameters and partially non-dimensionalising the SPM to determine the maximum expected degrees of freedom in the problem. We discover that, excluding open circuit voltage, there are only six independent parameters. We then examine the structural identifiability by considering whether the transfer function of the linearised SPM is unique. It is found that the model is unique provided that the electrode open circuit voltage functions have a known non-zero gradient, the parameters are ordered, and the electrode kinetics are lumped into a single charge transfer resistance parameter. We then demonstrate the practical estimation of model parameters from measured frequency-domain experimental electrochemical impedance spectroscopy (EIS) data, and show additionally that the parametrised model provides good predictive capabilities in the time domain, exhibiting a maximum voltage error of 20 mV between model and experiment over a 10 minute dynamic discharge.
description: 16 pages, 9 figures, pre-print submitted to the IEEE Transactions on Control Systems Technology
Wave propagation characteristics of Parareal
Creators: name: Ruprecht, Daniel
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: The paper derives and analyses the (semi-)discrete dispersion relation of the Parareal parallel-in-time integration method. It investigates Parareal's wave propagation characteristics with the aim to better understand what causes the well documented stability problems for hyperbolic equations. The analysis shows that the instability is caused by convergence of the amplification factor to the exact value from above for medium to high wave numbers. Phase errors in the coarse propagator are identified as the culprit, which suggests that specifically tailored coarse level methods could provide a remedy.
Macroscopic Quantum Tunneling Escape of Bose-Einstein Condensates
Creators: name: Zhao, Xinxin
name: Alcala, Diego A.
name: McLain, Marie A.
name: Maeda, Kenji
name: Potnis, Shreyas
name: Ramos, Ramon
name: Steinberg, Aephraim M.
name: Carr, Lincoln D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Recent experiments on macroscopic quantum tunneling reveal a non-exponential decay of the number of atoms trapped in a quasibound state behind a potential barrier. Through both experiment and theory, we demonstrate this non-exponential decay results from interactions between atoms. Quantum tunneling of tens of thousands of 87 Rb atoms in a Bose-Einstein condensate is modeled by a modified Jeffreys-Wentzel-Kramers-Brillouin model, taking into account the effective time-dependent barrier induced by the mean-field. Three-dimensional Gross-Pitaevskii simulations corroborate a mean-field result when compared with experiments. However, with one-dimensional modeling using time-evolving block decimation, we present an effective renormalized mean-field theory that suggests many-body dynamics for which a bare mean-field theory may not apply.
Classification of empty lattice $4$-simplices of width larger than two
Creators: name: Valiño, Óscar Iglesias
name: Santos, Francisco
Publisher: name: arXiv
Year: 2017
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: G.2.1
subject: 52B20

description: A lattice $d$-simplex is the convex hull of $d+1$ affinely independent integer points in ${\mathbb R}^d$. It is called empty if it contains no lattice point apart of its $d+1$ vertices. The classification of empty $3$-simplices is known since 1964 (White), based on the fact that they all have width one. But for dimension $4$ no complete classification is known. Haase and Ziegler (2000) enumerated all empty $4$-simplices up to determinant 1000 and based on their results conjectured that after determinant $179$ all empty $4$-simplices have width one or two. We prove this conjecture as follows: - We show that no empty $4$-simplex of width three or more can have determinant greater than 5058, by combining the recent classification of hollow 3-polytopes (Averkov, Krümpelmann and Weltge, 2017) with general methods from the geometry of numbers. - We continue the computations of Haase and Ziegler up to determinant 7600, and find that no new $4$-simplices of width larger than two arise. In particular, we give the whole list of empty $4$-simplices of width larger than two, which is as computed by Haase and Ziegler: There is a single empty $4$-simplex of width four (of determinant 101), and 178 empty $4$-simplices of width three, with determinants ranging from 41 to 179.
description: 21 pages, 5 figures; The appendix from v3 has been incorporated into the main text. This version has been accepted for publication in Trans. Ame. Math. Soc
Synthesis and pressure and field dependent magnetic properties of the Kagome-bilayer spin liquid Ca$_{10}$Cr$_7$O$_{28}$
Creators: name: Balodhi, Ashiwini
name: Singh, Yogesh
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report synthesis of polycrystalline samples of the recently discovered spin liquid material Ca$_{10}$Cr$_7$O$_{28}$ and present measurements of the ambient and high pressure magnetic susceptibility $χ$ versus temperature $T$, magnetization $M$ versus magnetic field $H$ at various $T$, and heat capacity $C$ versus $T$ at various $H$. The ambient pressure magnetic measurements indicate the presence of both ferromagnetic and antiferromagnetic exchange interactions with dominant ferromagnetic interactions and with the largest magnetic energy scale $\sim 10$~K\@. The $χ(T)$ measurements under externally applied pressure of up to $P \approx 1$~GPa indicate the robust nature of the spin-liquid state despite relative increase in the ferromagnetic exchanges. $C(T)$ shows a broad anomaly at $T\approx 2.5$~K which moves to higher temperatures in a magnetic field. The evolution of the low temperature $C(T,H)$ and the magnetic entropy is consistent with frustrated magnetism in Ca$_{10}$Cr$_7$O$_{28}$.
description: Revised Version accepted for publication
Combinatorial Alphabet-Dependent Bounds for Locally Recoverable Codes
Creators: name: Agarwal, Abhishek
name: Barg, Alexander
name: Hu, Sihuang
name: Mazumdar, Arya
name: Tamo, Itzhak
Publisher: name: arXiv
Year: 2017
Subjects: subject: Information Theory (cs.IT)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: Locally recoverable (LRC) codes have recently been a focus point of research in coding theory due to their theoretical appeal and applications in distributed storage systems. In an LRC code, any erased symbol of a codeword can be recovered by accessing only a small number of other symbols. For LRC codes over a small alphabet (such as binary), the optimal rate-distance trade-off is unknown. We present several new combinatorial bounds on LRC codes including the locality-aware sphere packing and Plotkin bounds. We also develop an approach to linear programming (LP) bounds on LRC codes. The resulting LP bound gives better estimates in examples than the other upper bounds known in the literature. Further, we provide the tightest known upper bound on the rate of linear LRC codes with a given relative distance, an improvement over the previous best known bounds.
description: To appear in IEEE Transactions on Information Theory
Cross-connections and variants of the full transformation semigroup
Creators: name: Muhammed, P. A. Azeef
Publisher: name: arXiv
Year: 2017
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20M10, 20M17, 20M50

description: Cross-connection theory propounded by K. S. S. Nambooripad describes the ideal structure of a regular semigroup using the categories of principal left (right) ideals. A variant $\mathscr{T}_X^θ$ of the full transformation semigroup $(\mathscr{T}_X,\cdot)$ for an arbitrary $θ\in \mathscr{T}_X$ is the semigroup $\mathscr{T}_X^θ= (\mathscr{T}_X,\ast)$ with the binary operation $α\ast β= α\cdotθ\cdotβ$ where $α, β\in \mathscr{T}_X$. In this article, we describe the ideal structure of the regular part $Reg(\mathscr{T}_X^θ)$ of the variant of the full transformation semigroup using cross-connections. We characterize the constituent categories of $Reg(\mathscr{T}_X^θ)$ and describe how they are \emph{cross-connected} by a functor induced by the sandwich transformation $θ$. This lead us to a structure theorem for the semigroup and give the representation of $Reg(\mathscr{T}_X^θ)$ as a cross-connection semigroup. Using this, we give a description of the biordered set and the sandwich sets of the semigroup.
EGS3021: Sustainability and the EnvironmentPractical: Vulnerability video2019 outline - Guidance document for 3rd year student vulnerability video project
Creators: name: Ziervogel, Gina
Publisher: name: University of Cape Town
Year: 2023
Subjects: Human impacts of climate change and human adaptation

description: This document outlines the process students were expected to follow for their 3rd year project making climate change vulnerability videos.
 Guidelines Decide on a research question to frame your group’s vulnerability assessment that you will undertake during your visits. The question should be about a certain person/individual and how they reduced their vulnerability to the drought. Although you might focus on their sensitivity, the intention is to capture how people adapted to the drought. Two vulnerability assessment tools should be used with the individual/group you visit to form the basis of your video documentation. The implementation of the tools can be supported by other video material (text, photos, stories, music). During the prac you will get into a group of 4 people, preferably those you don’t know. The reason for this is to encourage you to work with those you don’t know, as often different perspectives can strengthen insight into vulnerability as well as concepts for the video. During the prac you will pilot the 2 methods you have chosen with your group. Refining the methods will depend on who you are able to visit and film. In your group, plan your process and the steps that will be needed to produce a video. Everyone has different strengths to bring. Discuss who you think will undertake different roles (planning the visit, interviewing/running tools, translating, filming, editing, selecting music etc). At the end of the session one member must make a presentation to the class, on flipchart paper, of the intended focus of the vulnerability assessment, 2 methods chosen and filming plan.
A Generalized Labeled Multi-Bernoulli Filter with Object Spawning
Creators: name: Bryant, Daniel S.
name: Vo, Ba Tuong
name: Vo, Ba Ngu
name: Jones, Brandon A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: Previous labeled random finite set filter developments use a motion model that only accounts for survival and birth. While such a model provides the means for a multi-object tracking filter such as the Generalized Labeled Multi-Bernoulli (GLMB) filter to capture object births and deaths in a wide variety of applications, it lacks the capability to capture spawned tracks and their lineages. In this paper, we propose a new GLMB based filter that formally incorporates spawning, in addition to birth. This formulation enables the joint estimation of a spawned object's state and information regarding its lineage. Simulations results demonstrate the efficacy of the proposed formulation.
Development of learning activities based on creativity-based learning (CBL)to enhance mathematical creativity thinking and learning achievementon 3-dimensional geometric shapes of Grade-6 students
Creators: name: Suteeporn Koonkor
Publisher: name: Faculty of Science, Ubon Ratchathani University
Year: 2023
Subjects: Learning activities based on creativity-based learning
Learning achievement
Mathematical creativity thinking

description: Journal of Science and Science Education, 6, 2, 293-302
Raman spectroscopy of graphene under ultrafast laser excitation
Creators: name: Ferrante, C.
name: Virga, A.
name: Benfatto, L.
name: Martinati, M.
name: De Fazio, D.
name: Sassi, U.
name: Fasolato, C.
name: Ott, A. K.
name: Postorino, P.
name: Yoon, D.
name: Cerullo, G.
name: Mauri, F.
name: Ferrari, A. C.
name: Scopigno, T.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The equilibrium optical phonons of graphene are well characterized in terms of anharmonicity and electron-phonon interactions, however their non-equilibrium properties in the presence of hot charge carriers are still not fully explored. Here we study the Raman spectrum of graphene under ultrafast laser excitation with 3ps pulses, which trade off between impulsive stimulation and spectral resolution. We localize energy into hot carriers, generating non-equilibrium temperatures in the ~1700-3100K range, far exceeding that of the phonon bath, while simultaneously detecting the Raman response. The linewidth of both G and 2D peaks show an increase as function of the electronic temperature. We explain this as a result of the Dirac cones' broadening and electron-phonon scattering in the highly excited transient regime, important for the emerging field of graphene-based photonics and optoelectronics.
description: 10 pages, 7 figures
Viscosity of a classical gas: The rare-collision versus the frequent-collision regime
Creators: name: Magner, A. G.
name: Gorenstein, M. I.
name: Grygoriev, U. V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The shear viscosity $η$ for a dilute classical gas of hard-sphere particles is calculated by solving the Boltzmann kinetic equation in terms of the weakly absorbed plane waves. For the rare-collision regime, the viscosity $η$ as a function of the equilibrium gas parameters -- temperature $T$, particle number density $n$, particle mass $m$, and hard-core particle diameter $d$ -- is quite different from that of the frequent-collision regime, e.g., from the well-known result of Chapman and Enskog. An important property of the rare-collision regime is the dependence of $η$ on the external ("non-equilibrium") parameter $ω$, frequency of the sound plane wave, that is absent in the frequent-collision regime at leading order of the corresponding perturbation expansion. A transition from the frequent to the rare-collision regime takes place when the dimensionless parameter $nd^2 (T/m)^{1/2} ω^{-1}$ goes to zero.
description: 7 pages, 1 figure
EGS3021: Sustainability and the EnvironmentPractical: Vulnerability video consent form for student videos
Creators: name: Ziervogel, Gina
Publisher: name: University of Cape Town
Year: 2023
Subjects: Human impacts of climate change and human adaptation

description: A consent form for video subjects to complete before students film so that confidentiality and personal preferences are noted. As part of vulnerability video student assignment.
 Guidelines for the project: Decide on a research question to frame your group’s vulnerability assessment that you will undertake during your visits. The question should be about a certain person/individual and how they reduced their vulnerability to the drought. Although you might focus on their sensitivity, the intention is to capture how people adapted to the drought. Two vulnerability assessment tools should be used with the individual/group you visit to form the basis of your video documentation. The implementation of the tools can be supported by other video material (text, photos, stories, music). During the prac you will get into a group of 4 people, preferably those you don’t know. The reason for this is to encourage you to work with those you don’t know, as often different perspectives can strengthen insight into vulnerability as well as concepts for the video. During the prac you will pilot the 2 methods you have chosen with your group. Refining the methods will depend on who you are able to visit and film. In your group, plan your process and the steps that will be needed to produce a video. Everyone has different strengths to bring. Discuss who you think will undertake different roles (planning the visit, interviewing/running tools, translating, filming, editing, selecting music etc). At the end of the session one member must make a presentation to the class, on flipchart paper, of the intended focus of the vulnerability assessment, 2 methods chosen and filming plan.
EGS3021: Sustainability and the EnvironmentPractical: Vulnerability video marking rubric
Creators: name: Ziervogel, Gina
Publisher: name: University of Cape Town
Year: 2023
Subjects: Human impacts of climate change and human adaptation

description: This document provides a rubric for marking the vulnerability video assignment.
 Guidelines for the project: Decide on a research question to frame your group’s vulnerability assessment that you will undertake during your visits. The question should be about a certain person/individual and how they reduced their vulnerability to the drought. Although you might focus on their sensitivity, the intention is to capture how people adapted to the drought. Two vulnerability assessment tools should be used with the individual/group you visit to form the basis of your video documentation. The implementation of the tools can be supported by other video material (text, photos, stories, music). During the prac you will get into a group of 4 people, preferably those you don’t know. The reason for this is to encourage you to work with those you don’t know, as often different perspectives can strengthen insight into vulnerability as well as concepts for the video. During the prac you will pilot the 2 methods you have chosen with your group. Refining the methods will depend on who you are able to visit and film. In your group, plan your process and the steps that will be needed to produce a video. Everyone has different strengths to bring. Discuss who you think will undertake different roles (planning the visit, interviewing/running tools, translating, filming, editing, selecting music etc). At the end of the session one member must make a presentation to the class, on flipchart paper, of the intended focus of the vulnerability assessment, 2 methods chosen and filming plan.
On the delimitation of species through the study of contact zones
Creators: name: Chambers, Elizabeth Anne
name: 0000-0002-7369-0108
Publisher: name: The University of Texas at Austin
Year: 2022
Subjects: Contact zones
Species delimitation
Speciation
Taxonomy
Multispecies coalescent
Phylogenetics
Phylogenomics

description: A question central to evolutionary biology is how to best discover and describe boundaries between species, but debate surrounds how species boundaries should be drawn. In this dissertation, I argue that in geographically widespread and parapatrically-distributed groups, a definitive test for species delimitation hypotheses can be achieved through thorough sampling at contact zones by assessing whether there are deviations from random mating, indicating whether groups represent independently evolving lineages. Geographically widespread taxa present a particular problem for species delimitation using genetic data, as geographic variation and structuring typically exists in such groups, and this intraspecific variation can be mistaken for interspecific variation. This type of error is one of the main shortcomings of a popularized group of methods based on the multispecies coalescent model, in which these methods have been demonstrated to incorrectly split a single species into several due to the genetic structuring that is often present in widespread species. In Chapter 2, I examine the phylogenomic utility of data produced from two different next-generation sequencing methods, demonstrating that both methods perform well in two groups of non-model organisms with large genomes. In Chapter 3, I explore some of the impacts of the assumptions and limitations of multispecies coalescent-based methods by re-analyzing a dataset for the American milksnake (Lampropeltis triangulum complex) and introduce the concept of using contact zones for species delimitation. In Chapter 4, I expand on the hypotheses of Chapter 3 by collecting next-generation sequencing data across a contact zone in L. triangulum, demonstrating continuous mating across the contact zone, and thus support for a single species. I contrast this through the re-assessment of morphological data at a different contact zone, between L. triangulum and L. elapsoides, demonstrating that in this case, the opposite is true, and that a two-species hypothesis is supported. In Chapter 5, I examine contact zones within the Rana pipiens complex, and provide evidence for the recognition of five species that occur in sympatry with little or no hybridization. This dissertation demonstrates that contact zones can provide the definitive test for hypotheses of species boundaries, assessing whether groups are part of a single, independently evolving lineage or not.
Monitoring of the pre-season preparatory training by the mood profile and physical performance in the male soccer players.
Creators: name: Taghibeikzadehbadr, Pejman
name: Farzanegi, Parvin
name: Beykzade, H
name: Babaee, R
name: Robati, R
name: Jourkesh, M
name: ZEKI, OZKOL M
Publisher: name: figshare
Year: 2022
Subjects: subject: 110602 Exercise Physiology
subject: FOS: Health sciences

description: The aim of the present study was to monitor the pre-season preparatory training effectiveness by both the mood profile and physical performance.15 male soccer players mean age 25±2.21 yr, height 180.27±2.58 cm, weight 81.13±5.49 kg and 5 years playing experience voluntary participated in this study. The program combined strength and endurance training, 4 weeks progressive training and the 5th week declining activity (taper period). Assessments of mood and physical performances at first week, end of 4th and 5th weeks were performed.Variance of analysis with repeated measurements showed that the aerobic and anaerobic capacity did not change significantly after progressive training. But after taper period (the decline of training load) both indices increased significantly (p<0.05). However, the maximum strength, had significant increase during both the progressive training load and taper periods (p<0.05and p=0.05 respectively). Four weeks progressive training load period; had insignificant effect on mood profile except for fatigue.After the taper period, fatigue and mood depression showed significant reduction compared to the beginning of the training period (p<0.05, p<0.05 respectively). The overall results show that aerobic and anaerobic capacity compared to the reduction of training load is more sensitive than the time of progressive training load (p<0.05 for taper period and p>0.05 for time of progressive training load). Among the 6 mood factors, only fatigue and depression have been shown to be more sensitive to the change of training load.
Evading Classifiers by Morphing in the Dark
Creators: name: Dang, Hung
name: Huang, Yue
name: Chang, Ee-Chien
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Learning-based systems have been shown to be vulnerable to evasion through adversarial data manipulation. These attacks have been studied under assumptions that the adversary has certain knowledge of either the target model internals, its training dataset or at least classification scores it assigns to input samples. In this paper, we investigate a much more constrained and realistic attack scenario wherein the target classifier is minimally exposed to the adversary, revealing on its final classification decision (e.g., reject or accept an input sample). Moreover, the adversary can only manipulate malicious samples using a blackbox morpher. That is, the adversary has to evade the target classifier by morphing malicious samples "in the dark". We present a scoring mechanism that can assign a real-value score which reflects evasion progress to each sample based on the limited information available. Leveraging on such scoring mechanism, we propose an evasion method -- EvadeHC -- and evaluate it against two PDF malware detectors, namely PDFRate and Hidost. The experimental evaluation demonstrates that the proposed evasion attacks are effective, attaining $100\%$ evasion rate on the evaluation dataset. Interestingly, EvadeHC outperforms the known classifier evasion technique that operates based on classification scores output by the classifiers. Although our evaluations are conducted on PDF malware classifier, the proposed approaches are domain-agnostic and is of wider application to other learning-based systems.
Momentum-Resolved View of Electron-Phonon Coupling in Multilayer WSe$_2$
Creators: name: Waldecker, Lutz
name: Bertoni, Roman
name: Hübener, H.
name: Brumme, Thomas
name: Vasileiadis, Thomas
name: Zahn, Daniela
name: Rubio, Angel
name: Ernstorfer, Ralph
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the interactions of photoexcited carriers with lattice vibrations in thin films of the layered transition metal dichalcogenide (TMDC) WSe$_2$. Employing femtosecond electron diffraction with monocrystalline samples and first principle density functional theory calculations, we obtain a momentum-resolved picture of the energy-transfer from excited electrons to phonons. The measured momentum-dependent phonon population dynamics are compared to first principle calculations of the phonon linewidth and can be rationalized in terms of electronic phase-space arguments. The relaxation of excited states in the conduction band is dominated by intervalley scattering between $Σ$ valleys and the emission of zone-boundary phonons. Transiently, the momentum-dependent electron-phonon coupling leads to a non-thermal phonon distribution, which, on longer timescales, relaxes to a thermal distribution via electron-phonon and phonon-phonon collisions. Our results constitute a basis for monitoring and predicting out of equilibrium electrical and thermal transport properties for nanoscale applications of TMDCs.
Defect states emerging from a non-Hermitian flat band of photonic zero modes
Creators: name: Qi, Bingkun
name: Zhang, Lingxuan
name: Ge, Li
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We show the existence of a flat band consisting of photonic zero modes in a gain and loss modulated lattice system, as a result of the underlying non-Hermitian particle-hole symmetry. This general finding explains the previous observation in parity-time symmetric systems where non-Hermitian particle-hole symmetry is hidden. We further discuss the defect states in these systems, whose emergence can be viewed as an unconventional alignment of a pseudo-spin under the influence of a complex-valued pseudo-magnetic field. These defect states also behave as a chain with two types of links, one rigid in a unit cell and one soft between unit cells, as the defect states become increasingly localized with the gain and loss strength. A realistic photonic design is presented based on coupled InP/InGaAsP waveguides, and we also extend the discussion to two- and three-dimensional lattices.
description: 10 pages, 12 figures
A comparison of observed and simulated absorption from HI, CIV, and SiIV around $z\approx2$ star-forming galaxies suggests redshift-space distortions are due to inflows
Creators: name: Turner, Monica L.
name: Schaye, Joop
name: Crain, Robert A.
name: Rudie, Gwen
name: Steidel, Charles C.
name: Strom, Allison
name: Theuns, Tom
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study HI and metal-line absorption around $z\approx2$ star-forming galaxies by comparing an analysis of data from the Keck Baryonic Structure Survey to mock spectra generated from the EAGLE cosmological, hydrodynamical simulations. We extract sightlines from the simulations and compare the properties of the absorption by HI, CIV and SiIV around simulated and observed galaxies using pixel optical depths. We mimic the resolution, pixel size, and signal-to-noise ratio of the observations, as well as the distributions of impact parameters and galaxy redshift errors. We find that the EAGLE reference model is in excellent agreement with the observations. In particular, the simulation reproduces the high metal-line optical depths found at small galactocentric distances, the optical depth enhancements out to impact parameters of 2 proper Mpc, and the prominent redshift-space distortions which we find are due to peculiar velocities rather than redshift errors. The agreement is best for halo masses $\sim10^{12.0}$ M$_\odot$, for which the observed and simulated stellar masses also agree most closely. We examine the median ion mass-weighted radial gas velocities around the galaxies, and find that most of the gas is infalling, with the infall velocity depending on halo rather than stellar mass. From this we conclude that the observed redshift-space distortions are predominantly caused by infall rather than outflows.
description: Accepted for publication in MNRAS, 15 pages, 8 figures (not including appendices)
Software per la caratterizzazione e l’integrazione nel sistema di osservazione del SRT del ricevitore banda Q - Manuale Utente
Creators: name: ORLATI, ANDREA
name: MONTI, LORENZO
name: MARIOTTI, SERGIO
Publisher: name: IRA Bologna
Year: 2023

description: Il presente documento ha l’obiettivo di descrivere le funzionalità del software denominato calibrate-multifeed-receiver, realizzato per agevolare la caratterizzazione e l’integrazione di un ricevitore. Il sistema si basa sull’utilizzo di un analizzatore di spettro, nello specifico i test sono stati effettuati con un Anritsu MS2830A visibile in Figura 1.1, di un software implementato in Python 3, e di un’interfaccia grafica scritta in Tk per facilitare l’operatore.
Improved constraints on violations of the Einstein equivalence principle in the electromagnetic sector with complementary cosmic probes
Creators: name: Holanda, R. F. L.
name: Pereira, S. H.
name: Busti, V. C.
name: Bessa, C. H. G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Recent results have shown that a field non-minimally coupled to the electromagnetic Lagrangian can induce a violation of the Einstein equivalence principle. { This kind of coupling is present in a very wide class of gravitation theories.} In a cosmological context, this would break the validity of the cosmic distance duality relation as well as cause a time variation of the fine structure constant. Here, we improve constraints on this scenario by using four different observables: the luminosity distance of type Ia supernovae, the angular diameter distance of galaxy clusters, the gas mass fraction of galaxy clusters and the temperature of the cosmic microwave background at different redshifts. We consider four standard parametrizations adopted in the literature and show that, due to a high complementarity of the data, the errors are shrunk between 20\% and 40\% depending on the parametrization. We also show that our constraints are weakly affected by the geometry considered to describe the galaxy clusters. In short, no violation of the Einstein equivalence principle is detected up to redshifts $\sim$ 3.
description: 14 pages, 3 figures, I table, Classical and Quantum Gravity, in press
Supernova equations of state including full nuclear ensemble with in-medium effects
Creators: name: Furusawa, Shun
name: Sumiyoshi, Kohsuke
name: Yamada, Shoichi
name: Suzuki, Hideyuki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We construct new equations of state for baryons at sub-nuclear densities for the use in core-collapse supernova simulations. The abundance of various nuclei is obtained together with thermodynamic quantities. The formulation is an extension of the previous model, in which we adopted the relativistic mean field theory with the TM1 parameter set for nucleons, the quantum approach for $d$, $t$, $h$ and $α$ as well as the liquid drop model for the other nuclei under the nuclear statistical equilibrium. We reformulate the model of the light nuclei other than $d$, $t$, $h$ and $α$ based on the quasi-particle description. Furthermore, we modify the model so that the temperature dependences of surface and shell energies of heavy nuclei could be taken into account. The pasta phases for heavy nuclei and the Pauli- and self-energy shifts for $d$, $t$, $h$ and $α$ are taken into account in the same way as in the previous model. We find that nuclear composition is considerably affected by the modifications in this work, whereas thermodynamical quantities are not changed much. In particular, the washout of shell effect has a great impact on the mass distribution above $T \sim 1$ MeV. This improvement may have an important effect on the rates of electron captures and coherent neutrino scatterings on nuclei in supernova cores.
description: 39 pages, 6 figures, 2 tables, Accepted for publication in Nucl.Phys. A. This article draws heavily from arXiv:1305.1508. The EOS table available at http://sites.google.com/site/furusawashun/eosdata
Distinct nature of static and dynamic magnetic stripes in cuprate superconductors
Creators: name: Jacobsen, H.
name: Holm, S. L.
name: Lacatusu, M. -E.
name: Rømer, A. T.
name: Bertelsen, M.
name: Boehm, M.
name: Toft-Petersen, R.
name: Grivel, J. -C.
name: Emery, S. B.
name: Udby, L.
name: Wells, B. O.
name: Lefmann, K.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present detailed neutron scattering studies of the static and dynamic stripes in an optimally doped high-temperature superconductor, La$_2$CuO$_{4+y}$. We find that the dynamic stripes do not disperse towards the static stripes in the limit of vanishing energy transfer. We conclude that the dynamic stripes observed in neutron scattering experiments are not the Goldstone modes associated with the broken symmetry of the simultaneously observed static stripes, but rather that the signals originate from different domains in the sample. These domains may be related by structural twinning, or may be entirely different phases, where the static stripes in one phase are pinned versions of the dynamic stripes in the other. Our results explain earlier observations of unusual dispersions in underdoped La$_{2-x}$Sr$_x$CuO$_{4}$ ($x=0.07$) and La$_{2-x}$Ba$_x$CuO$_{4}$ ($x=0.095$). Our findings are relevant for all compounds exhibiting magnetic stripes, and may thus be a vital part in unveiling the nature of high temperature superconductivity.
The First Optical Spectra of Wolf Rayet Stars in M101 Revealed with Gemini/GMOS
Creators: name: Pledger, J. L.
name: Shara, M. M.
name: Wilde, M.
name: Crowther, P. A.
name: Long, K.
name: Zurek, D.
name: Moffat, A. F. J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Deep narrow-band HST imaging of the iconic spiral galaxy M101 has revealed over a thousand new Wolf Rayet (WR) candidates. We report spectrographic confirmation of 10 HeII emission line sources hosting 15 WR stars. We find WR stars present at both sub- and super-solar metalicities with WC stars favouring more metal-rich regions compared to WN stars. We investigate the association of WR stars with HII regions using archival HST imaging and conclude that the majority of WR stars are in or associated with HII regions. Of the 10 emission lines sources, only one appears to be unassociated with a star-forming region. Our spectroscopic survey provides confidence that our narrow-band photometric candidates are in fact bonafide WR stars, which will allow us to characterise the progenitors of any core-collapse supernovae that erupt in the future in M101.
description: 27 pages, 26 Figures, Accepted to MNRAS
Kinetics of interactions of matter, antimatter and radiation consistent with antisymmetric (CPT-invariant) thermodynamics
Creators: name: Klimenko, A. Y.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This work investigates the influence of directional properties of decoherence on kinetics rate equations. The physical reality is understood as a chain of unitary and decoherence events. The former are quantum-deterministic, while the latter introduce uncertainty and increase entropy. For interactions of matter and antimatter, two approaches are considered: symmetric decoherence, which corresponds to conventional symmetric (CP-invariant) thermodynamics, and antisymmetric decoherence, which corresponds to antisymmetric (CPT-invariant) thermodynamics. Radiation, in its interactions with matter and antimatter, is shown to be decoherence-neutral. The symmetric and antisymmetric assumptions result in different interactions of radiation with matter and antimatter. The theoretical predictions for these differences are testable by comparing absorption (emission) of light by thermodynamic systems made of matter and antimatter. Canonical typicality for quantum mixtures is briefly discussed in the Appendix.
description: 25 pages 6 figures (the published version)
Catalogación de las libélulas (Insecta: Odonata) de un humedal andino en el departamento de Cusco, Perú
Creators: name: Elme-Tumpay, Araseli
name: Bustamante Navarrete, Abdhiel Arnaldo
name: Zuñiga Rivas, Dorali
name: Yabar-Landa, Erick
Publisher: name: figshare
Year: 2023
Subjects: Zoology not elsewhere classified

description: Three species of odonates represented in the Entomological Collection of the Universidad Nacional de San Antonio Abad del Cusco (ECUC) are cataloged for the Andean Wetland Lucre -Huacarpay, department of Cusco, Peru, and distribution data for these species are provided.
 Tres especies de odonatos representadas en la Colección Entomológica de la Universidad Nacional de San Antonio Abad del Cusco (CEUC) son catalogadas para el humedal andino Lucre - Huacarpay, departamento de Cusco, Perú y se aportan datos de distribución para dichas especies.
Probing Lepton Flavor Violation Signal via γγ\to l_i\barl_j in the Left-Right Twin Higgs Model at the ILC
Creators: name: Liu, Guo-Li
name: Wang, Fei
name: Xie, Kuan
name: Guo, Xiao-Fei
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: To explain the small neutrino masses, heavy Majorana neutrinos are introduced in the left-right twin Higgs model. The heavy neutrinos, together with the charged scalars and the heavy gauge bosons, may contribute large mixings between the neutrinos and the charged leptons, which may induce some distinct lepton flavor violating processes. We will check the \bar \ell_i \ell_j (i,j= e,μ,τ,i\neq j) productions in the γγcollision in the left-right twin Higgs model, and find that the production rates may be large in some specific parameter space, in the optimal cases even possible to be detected with reasonable kinematical cuts. we have also shown that these collisions can constrain effectively the model parameters such as the Higgs vacuum expectation value and the right-handed neutrino mass, etc., and may serve as a sensitive probe of this new physics model.
description: 17 pages, 7 figures, published version
MARKETING DE VENDAS COMO FORMA DE DIVULGAÇÃO DA EMPRESA
Creators: name: Caroline Moreira Ribeiro SANTOS
name: Cícero Pereira da SILVA
name: Crislane Ferreira da SILVA
name: Letícia S. Rosa MOREIRA
name: Luciana Zimmermann SANDIN
Publisher: name: Zenodo
Year: 2024
Subjects: Marketing de Vendas
Divulgação
Empresa

description: RESUMO

 

Entender os clientes e quais são as suas motivações para compra é de extrema importância para qualquer profissional da área de marketing. Existindo vários fatores queinterferem e influenciam nas motivações de compras, como campanhas de mídia, indicações de outros clientes, etc. O trabalho explora exatamente isso, o marketing nestemercado, o que faz com que o cliente procure os móveis planejados, o que levam a escolher uma empresa específica, os fatores negativos que levam a não efetivarem uma compra, fatores de preço e qualidade e motivações. Os clientes deste mercado são extremamente sensíveis a campanhas de comunicação e publicitária, promoções e indicações, o que demonstra preocupação com a qualidade dos produtos e dos serviços prestados pela empresa.
Learning from Multi-View Multi-Way Data via Structural Factorization Machines
Creators: name: Lu, Chun-Ta
name: He, Lifang
name: Ding, Hao
name: Cao, Bokai
name: Yu, Philip S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Real-world relations among entities can often be observed and determined by different perspectives/views. For example, the decision made by a user on whether to adopt an item relies on multiple aspects such as the contextual information of the decision, the item's attributes, the user's profile and the reviews given by other users. Different views may exhibit multi-way interactions among entities and provide complementary information. In this paper, we introduce a multi-tensor-based approach that can preserve the underlying structure of multi-view data in a generic predictive model. Specifically, we propose structural factorization machines (SFMs) that learn the common latent spaces shared by multi-view tensors and automatically adjust the importance of each view in the predictive model. Furthermore, the complexity of SFMs is linear in the number of parameters, which make SFMs suitable to large-scale problems. Extensive experiments on real-world datasets demonstrate that the proposed SFMs outperform several state-of-the-art methods in terms of prediction accuracy and computational cost.
description: 10 pages
Cosmological implications of shift symmetric Galileon field
Creators: name: Banerjee, Rabin
name: Chakraborty, Sumanta
name: Mitra, Arpita
name: Mukherjee, Pradip
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A ghost-free metric formulation of the recently proposed covariant Galileon model \cite{RPgal} which retains the internal shift symmetry has been constructed. This presents a new result because the covariant Galileon models introduced so far in the literature lacks the full Galileon symmetry. We demonstrate that the same general procedure is applicable to all the Galileon interaction terms and the resulting ghost-free Galileon action respecting internal shift symmetry cannot predict the late time acceleration of the universe. However, weakly breaking the shift symmetry in the covariant Galileon Lagrangian, allows us to include an appropriate potential term which can explain late time acceleration, in accordance with recent findings in the literature.
description: Revised Version; Accepted in PRD; 20 pages; 1 figure