cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Constraints on neutrino masses from the study of the nearby large-scale structure and galaxy cluster counts
Creators: name: Boehringer, Hans
name: Chon, Gayoung
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The high precision measurements of the cosmic microwave background by the Planck survey yielded tight constraints on cosmological parameters and the statistics of the density fluctuations at the time of recombination. This provides the means for a critical study of structure formation in the Universe by comparing the microwave background results with present epoch measurements of the cosmic large-scale structure. It can reveal subtle effects such as how different forms of Dark Matter may modify structure growth. Currently most interesting is the damping effect of structure growth by massive neutrinos. Different observations of low redshift matter density fluctuations provided evidence for a signature of massive neutrinos. Here we discuss the study of the cosmic large-scale structure with a complete sample of nearby, X-ray luminous clusters from our REFLEX cluster survey. From the observed X-ray luminosity function and its reproduction for different cosmological models, we obtain tight constraints on the cosmological parameters describing the matter density, Omega_m, and the density fluctuation amplitude, sigma_8. A comparison of these constraints with the Planck results shows a discrepancy in the framework of a pure LambdaCDM model, but the results can be reconciled, if we allow for a neutrino mass in the range of 0.17 to 0.7 eV. Also some others, but not all of the observations of the nearby large-scale structure provide evidence or trends for signatures of massive neutrinos. With further improvement in the systematics and future survey projects, these indications will develop into a definitive measurement of neutrino masses.
description: 10 pages, 4 figures
Quantum thermal transport in stanene
Creators: name: Zhou, Hangbo
name: Cai, Yongqing
name: Zhang, Gang
name: Zhang, Yong-Wei
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By way of the non-equilibrium Green's function simulations and analytical expressions, the quantum thermal conductance of stanene is studied. We find that, due to the existence of Dirac fermion in stanene, the ratio of electron thermal conductance and electric conductance becomes a chemical-potential-dependent quantity, violating the Wiedemann-Franz law. This finding is applicable to any two-dimensional (2D) materials that possess massless Dirac fermions. In strong contrast to the negligible electronic contribution in graphene, surprisingly, the electrons and phonons in stanene carry a comparable heat current. The unusual behaviours in stanene widen our knowledge of quantum thermal transport in 2D materials.
Mesotuned WIMPs and Avoided Deconfinement
Creators: name: Nee, Michael
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the production of dark matter with mass of order $10$-$100$ TeV and $\mathcal{O}(1)$ couplings to the standard model, a scenario we refer to as the `mesotuned WIMP'. Given the lack of new physics observed at the LHC, indicating we live in a world with some degree of fine-tuning, this scale is a natural scale to expect new particles to appear. However, dark matter with mass in this range and large couplings is difficult to produce with the observed relic abundance via the usual mechanisms. Here we discuss the nonthermal production of dark matter and show that this mechanism can produce the observed dark matter in this mass range, but requires a specific relationship between the dark matter mass and the reheat temperature. It is shown that the avoided deconfinement model removes the dependence on the reheat temperature and predicts a dark matter candidate that can be tested at the Cherenkov Telescope Array and direct detection experiments, offering a natural setting for mesotuned WIMP dark matter.
description: 6 pages, 2 figures, journal version
MPEC 2023-N16 : OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Thermodynamics and phase transition in central charge criticality of charged Gauss-Bonnet AdS black holes
Creators: name: Qu, Yang
name: Tao, Jun
name: Yang, Huan
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we investigate the thermodynamics of D-dimensional charged Gauss-Bonnet black holes in anti-de Sitter spacetime. Varying the cosmological constant, Newton constant and Gauss-Bonnet coupling constant in the bulk, one can rewrite the first law of thermodynamics for black holes. Furthermore, we introduce the central charge and study the critical behaviors, which show the apparent discrepancy from other black holes. Based on this approach, we disclose the phase transition structures in $D=4, 5$, and $6$. Besides, a triple point where the small/intermediate/large black holes can coexist is found in $D=6$.
Chinese Alcohol and the Struggle Abroad
Creators: name: Zhang, Luoman
Publisher: name: University of Leicester
Year: 2022
Subjects: Uncategorized

description: Cultural intermediaries perform to mediate how goods are perceived by intended receivers; by adding symbolic value, they legitimate culturally no-yet-legitimate goods and facilitate market dynamics. Previous research on cultural intermediaries has demonstrated the way in which cultural intermediaries make markets, many of which have focused on advertising, branding, food industry and other related industry. Other studies in this field have examined the factors that affect their intermediary work and some of them have researched on specific cases which are cultural taboos or culturally not-yet-legitimate, such as sex toys and entomophagy. This qualitative longitudinal study extends the existing literature by using a non-Western product – baijiu (Chinese alcohol) and exploring baijiu cultural intermediaries in the same market line but different stages. 25 baijiu practitioners in the UK and China participated in the research, with detailed evidence gained from the interview with them. The key feature of the methodology is the interview with upstream cultural intermediaries (marketing managers, brand representatives etc.) and downstream cultural intermediaries (bartenders, restaurant servers etc.), which enabled the analysis of cultural intermediaries in the same market line but different stages. Through their narratives, the similarities and differences of cultural intermediaries in the same market line are highlighted and deeper insights are provided into how cultural intermediaries perform under a non-Western context. The research findings have implications for the study of cultural intermediaries as they fill the gap of previous studies which lack of consideration on non-Western products. They also provide insights into the interconnections between cultural intermediaries within market chains, which can be a nuanced difference compare to previous research, and the future studies in this field can take. The findings also offer implications for the study of branding, especially in alcohol industry, and provide practical implications for marketing and brand managers.
Modulation and nonlinear evolution of multi-dimensional Langmuir wave envelopes in a relativistic plasma
Creators: name: Shahmansouri, M.
name: Misra, A. P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The modulational instability (MI) and the evolution of weakly nonlinear two-dimensional (2D) Langmuir wave (LW) packets are studied in an unmagnetized collisionless plasma with weakly relativistic electron flow. By using a 2D self-consistent relativistic fluid model and employing the standard multiple-scale technique, a coupled set of Davey-Stewartson (DS)-like equations is derived which governs the slow modulation and the evolution of LW packets in relativistic plasmas. It is found that the relativistic effects favor the instability of LW envelopes in the kθ plane, where k is the wave number and θ the angle of modulation. It is also found that as the electron thermal velocity or θ increases, the growth rate of MI increases with cutoffs at higher wave numbers of modulation. Furthermore, in the nonlinear evolution of the DS-like equations, it is seen that with an effect of the relativistic flow, a Gaussian wave beam collapses in a finite time, and the collapse can be arrested when the effect of the thermal pressure or the relativistic flow is slightly relaxed. The present results may be useful to the MI and the formation of localized LW envelopes in cosmic plasmas with a relativistic flow of electrons.
description: 12 pages, 4 figures; to appear in Physics of Plasmas (2016)
Non-perturbative non-Gaussianity and primordial black holes
Creators: name: Gow, Andrew D.
name: Assadullahi, Hooshyar
name: Jackson, Joseph H. P.
name: Koyama, Kazuya
name: Vennin, Vincent
name: Wands, David
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a non-perturbative method for calculating the abundance of primordial black holes given an arbitrary one-point probability distribution function for the primordial curvature perturbation, $P(ζ)$. A non-perturbative method is essential when considering non-Gaussianities that cannot be treated using a conventional perturbative expansion. To determine the full statistics of the density field, we relate $ζ$ to a Gaussian field by equating the cumulative distribution functions. We consider two examples: a specific local-type non-Gaussian distribution arising from ultra slow roll models, and a general piecewise model for $P(ζ)$ with an exponential tail. We demonstrate that the enhancement of primordial black hole formation is due to the intermediate regime, rather than the far tail. We also show that non-Gaussianity can have a significant impact on the shape of the primordial black hole mass distribution.
description: 9 pages, 2 figures; Version 3: matches published version
Modulation instability in nonlinear flexible mechanical metamaterials
Creators: name: Demiquel, Antoine
name: Achilleos, Vassos
name: Theocharis, Georgios
name: Tournat, Vincent
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In this paper, we study modulation instabilities (MI) in a one-dimensional chain configuration of a flexible mechanical metamaterial (flexMM). Using the lumped element approach, flexMMs can be modeled by a coupled system of discrete equations for the longitudinal displacements and rotations of the rigid mass units. In the long wavelength regime, and applying the multiple-scales method we derive an effective nonlinear Schrödinger equation for slowly varying envelope rotational waves. We are then able to establish a map of the occurrence of MI to the parameters of the metamaterials and the wavenumbers. We also highlight the key role of the rotation-displacement coupling between the two degrees of freedom in the manifestation of MI. All analytical findings are confirmed by numerical simulations of the full discrete and nonlinear lump problem. These results provide interesting design guidelines for nonlinear metamaterials offering either stability to high amplitude waves, or conversely being good candidates to observe instabilities.
description: 12 pages, 9 figures
Topological Manin pairs and $(n,s)$-type series
Creators: name: Abedin, Raschid
name: Maximov, Stepan
name: Stolin, Alexander
Publisher: name: arXiv
Year: 2022
Subjects: subject: Rings and Algebras (math.RA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 17B62, 17B38 (Primary), 17B80 (Secondary)

description: Lie subalgebras of $ L = \mathfrak{g}(\!(x)\!) \times \mathfrak{g}[x]/x^n\mathfrak{g}[x] $, complementary to the diagonal embedding $Δ$ of $ \mathfrak{g}[\![x]\!] $ and Lagrangian with respect to some particular form, are in bijection with formal classical $r$-matrices and topological Lie bialgebra structures on the Lie algebra of formal power series $ \mathfrak{g}[\![x]\!] $. In this work we consider arbitrary subspaces of $ L $ complementary to $Δ$ and associate them with so-called series of type $ (n,s) $. We prove that Lagrangian subspaces are in bijection with skew-symmetric $ (n,s) $-type series and topological quasi-Lie bialgebra structures on $ \mathfrak{g}[\![x]\!] $. Using the classificaiton of Manin pairs we classify up to twisting and coordinate transformations all quasi-Lie bialgebra structures. Series of type $ (n,s) $, solving the generalized Yang-Baxter equation, correspond to subalgebras of $L$. We discuss their possible utility in the theory of integrable systems.
Download & Setup Overhead
Creators: name: Greiner-Petter, Moritz
Publisher: name: Zenodo
Year: 2023

description: These are instructions on how to set up and run "Overhead". "Overhead" is an experimental MacOS app that allows you to spontaneously overlay a webcam feed with text, drawings or images, as well as to manipulate the video display. You can find the executable app in this repository.
Crossover from weakly to strongly correlated regions in the two-dimensional Hubbard model -- Off-diagonal wave function Monte Carlo studies of Hubbard model II --
Creators: name: Yanagisawa, Takashi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The ground state of the two-dimensional (2D) Hubbard model is investigated by adopting improved wave functions that take into account intersite electron correlation beyond the Gutzwiller ansatz. The ground-state energy is lowered considerably, giving the best estimate of the ground-state energy for the 2D Hubbard model. There is a crossover from weakly to strongly correlated regions as the on-site Coulomb interaction $U$ increases. The antiferromagnetic correlation induced by $U$ is reduced for hole doping when $U$ is large, being greater than the bandwidth, thus increasing the kinetic energy gain. The spin and charge fluctuations are induced in the strongly correlated region. These antiferromagnetic and kinetic charge fluctuations induce electron pairings, which would result in high-temperature superconductivity.
DHOST gravity in Ultra-diffuse galaxies -- Part II: NGC 1052-DF4 and Dragonfly 44
Creators: name: Laudato, Enrico
name: Salzano, Vincenzo
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Ultra-Diffuse galaxies are gravitational systems with quite varied properties. On one hand we have cases like DF2 and DF4, both observed by the Dragonfly Array Telescope, claimed to be highly-deficient in dark matter. On the other hand, we have also observed dark matter dominated UDGs, such as DF44, estimated to be at $99\%$ dark. Such variety of behaviors might be a problem for both the standard dark matter paradigm and for alternative theories of gravity. Here we consider a modified gravity theory belonging to the family of Degenerate Higher-Order Scalar Tensor theories to study the internal kinematics of both DF4 and DF44. The peculiarity of the chosen model is the partial breaking of its Vaishtein screening mechanism for which it might have an influence not only on cosmological but also on astrophysical scales. We consider two different possibilities: one in which the model only plays the role of dark energy; and another one in which it might also mimic a sort of effective dark matter. We get conflicting results. For DF4 we confirm that the galaxy dynamics might be successfully described even only by a stellar component and that, at least at the scale which are probed, the content of dark matter is quite low. In addition to that, we show that the DHOST model is totally consistent with data and is statistically equivalent to a standard General Relativity dark matter scenario, and it might even replace dark matter. On the contrary, DF44 requires dark matter both in General Relativity and in our DHOST model. When the latter is considered only as a cosmological dark energy fluid, it is statistically fully reliable and equivalent to General Relativity. But when we try to use it to substitute dark matter, although we get good fits to the data, the constraints on the theoretical parameters are in sharp contrast with those derived from more stringent probes from the stellar scales.
description: 17 pages, 3 tables, 5 figures. Comments are welcome
$a_0(980)$ photoproduction in the coupled channel model
Creators: name: Bibrzycki, Ł.
name: Kamiński, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculated the coupled channel photoproduction amplitudes of the scalar isovector resononace $a_0(980)$, which include the $πη$, $K^+K^-$ and $K^0\overline{K^0}$ intermediate states. Based on them we obtained the mass distribution in the $πη$ channel at photon energy $E_γ$=7 GeV, corresponding to energy accissible in new JLab experiments CLAS12 and GlueX. We also analyzed the shape of mass distribution as a function of the phase of the background amplitude.
description: 5 pages, 3 figures
Exercises in Collaborative Formatting – Workshop Notes
Creators: name: Greiner-Petter, Moritz
Publisher: name: Zenodo
Year: 2023

description: "Exercises in Collaborative Formatting" was an online workshop held by Moritz Greiner-Petter with members of the Critical Media Lab Basel on 2nd February 2022. In two sessions, participants collected and discussed personal issues and frictions with existing digital collaboration tools and developed brief concepts for alternative collaboration formats in small groups. These are edited and anonymised notes from the workshop.
Orbit Error Correction on the High Energy Beam Transport Line at the KHIMA Accelerator System
Creators: name: Park, Chawon
name: Yim, Heejoong
name: Hahn, Garam
name: An, Dong Hyun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: For the purpose of treatment of various cancer and medical research, the synchrotron based medical machine under the Korea Heavy Ion Medical Accelerator (KHIMA) project have been conducted and is going to treat the patient at the beginning of 2018. The KHIMA synchrotron is designed to accelerate and extract the carbon ion (proton) beam with various energy range, 110 up to 430 MeV/u (60 up to 230 MeV). A lattice design and beam optics studies for the High Energy Beam Transport (HEBT) line at the KHIMA accelerator system have been carried out with WinAgile and the MAD-X codes. Because the magnetic eld errors and the mis-alignments introduce to the deviations from the design parameters, these error sources should be treated explicitly and the sensitivity of the machine's lattice to di erent individual error sources is considered. Various types of errors which are static and dynamic one have been taken into account and have been consequentially corrected with a dedicated correction algorithm by using the MAD-X program. As a result, the tolerances for the diverse error contributions have been speci ed for the dedicated lattice components in the whole HEBT lines.
description: ICABU2015 conference (in Korea)
Local equilibria and state transfer of charged classical particles on a helix in an electric field
Creators: name: Plettenberg, J.
name: Stockhofe, J.
name: Zampetaki, A. V.
name: Schmelcher, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Physics (physics.class-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We explore the effects of a homogeneous external electric field on the static properties and dynamical behavior of two charged particles confined to a helix. In contrast to the field-free setup which provides a separation of the center-of-mass and relative motion, the existence of an external force perpendicular to the helix axis couples the center-of-mass to the relative degree of freedom leading to equilibria with a localized center of mass. By tuning the external field various fixed points are created and/or annihilated through different bifurcation scenarios. We provide a detailed analysis of these bifurcations based on which we demonstrate a robust state transfer between essentially arbitrary equilibrium configurations of the two charges that can be induced by making the external force time-dependent.
description: 9 pages, 10 figures
Exercises in Collaborative Formatting – Workshop Miro Board
Creators: name: Greiner-Petter, Moritz
Publisher: name: Zenodo
Year: 2023

description: "Exercises in Collaborative Formatting" was an online workshop held by Moritz Greiner-Petter with members of the Critical Media Lab Basel on 2nd February 2022. In two sessions, participants collected and discussed personal issues and frictions with existing digital collaboration tools and developed brief concepts for alternative collaboration formats in small groups. This is an export of the shared online board created in Miro and used collectively during the workshop.
Wide bandgap semiconductor from a hidden 2D incommensurate graphene phase
Creators: name: Conrad, Matthew
name: Wang, Feng
name: Nevius, Meredith
name: Jinkins, Katherine
name: Celis, Arlensiú
name: Nair, Maya
name: Taleb-Ibrahim, Amina
name: Tejeda, Antonio
name: Garreau, Yves
name: Vlad, Alina
name: Coati, Alessandro
name: Miceli, Paul
name: Conrad, Edward
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Producing a usable semiconducting form of graphene has plagued the development of graphene electronics for nearly two decades. Now that new preparation methods have become available, graphene's intrinsic properties can be measured and the search for semiconducting graphene has begun to produce results. This is the case of the first graphene "buffer" layer grown on SiC(0001) presented in this work. We show, contrary to assumptions of the last forty years, that the buffer graphene layer is not commensurate with SiC. The new modulated structure we've found resolves a long standing contradiction where ab initio calculations expect a metallic buffer, while experimentally it is found to be a semiconductor. Model calculations using the new incommensurate structure show that the semiconducting $π$-band character of the buffer comes from partially hybridized graphene incommensurate boundaries surrounding unperturbed graphene islands.
description: 17 pages, 4 figures, 1 table, 47 references, supplemental material: 15 pages, 4 figures
Phantom cosmological model with observational constraints in $f(Q)$ gravity
Creators: name: Narawade, S. A.
name: Mishra, B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, the cosmological model of the Universe has been presented in $f(Q)$ gravity and the parameters are constrained from the cosmological data sets. At the beginning, we have employed a well motivated form of $f(Q) = α+ βQ^{n}$, where $α$, $β$ and $n$ are model parameters. We have obtained the Hubble parameter in redshift with some algebraic manipulation from the considered form of $f(Q)$. Then we parameterize with the recent $Hubble$ data and $Pantheon + SHOES$ data using $\textit{MCMC}$ analysis. We validate our obtained model parameter values with $\textit{BAO}$ data set. A parametrization of the cosmographic parameters shows the early deceleration and late time acceleration with the transition at $z_t\approx0.75$. The $Om(z)$ diagnostics gives positive slope which shows that the model in the phantom phase. Also the current age of Universe has been obtained as, $t_{0} = 13.85~~Gyrs$. Based on the present analysis, it indicates that the $f(Q)$ gravity may provide an alternative to dark energy for addressing the current cosmic acceleration.
description: 12 pages, 9 figures
Boundedness and persistence of delay differential equations with mixed nonlinearity
Creators: name: Berezansky, Leonid
name: Braverman, Elena
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 34K25, 34K60, 92D25, 34K23

description: For a nonlinear equation with several variable delays $$ \dot{x}(t)=\sum_{k=1}^m f_k(t, x(h_1(t)),\dots,x(h_l(t)))-g(t,x(t)), $$ where the functions $f_k$ increase in some variables and decrease in the others, we obtain conditions when a positive solution exists on $[0, \infty)$, as well as explore boundedness and persistence of solutions. Finally, we present sufficient conditions when a solution is unbounded. Examples include the Mackey-Glass equation with non-monotone feedback and two variable delays; its solutions can be neither persistent nor bounded, unlike the well studied case when these two delays coincide.
description: 24 pages, published in Applied Mathematics and Computation, 2016
Origin of multiple band gap values in single width nanoribbons
Creators: name: Deepika
name: Kumar, Shailesh
name: Shukla, Alok
name: Kumar, Rakesh
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Deterministic band gap in quasi-one-dimensional nanoribbons is prerequisite for their integrated functionalities in high-performance molecular-electronics based devices. However, multiple band gap values commonly observed in the same width of graphene nanoribbons fabricated in same slot of the experiments remains unresolved, and raise a critical concern over scalable production of pristine and/or hetero-structure nanoribbons with deterministic properties and functionalities for plethora of applications. Here, we show that a modification in the depth of potential wells in the periodic direction of a supercell on relative shifting of passivating atoms at the edges is the origin of multiple band gap values for the same width of nanoribbons in a crystallographic orientation, although they carry practically the same ground state energy. The results are similar when calculations are extended from planar graphene to buckled silicene nanoribbons. Thus, the findings facilitate tuning of the electronic properties of quasi-one-dimensional materials such as bio-molecular chains, organic and inorganic nanoribbons by performing edge engineering.
description: 11 pages, 6 figures
Mean pion multiplicities in Ar+Sc collisions
Creators: name: Naskręt, Michał
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Preliminary results for mean negatively charged pion multiplicities $\langle π^- \rangle$ using the $h^-$ method are presented for central Ar+Sc collisions at 13, 19, 30, 40, 75 and 150\textit{A} GeV/c beam momentum. The data were recorded by the NA61/SHINE detector at the CERN SPS. Starting with rapidity distributions ${dn}/{dy}$ the procedure of obtaining total multiplicities is presented. The mean number of wounded nucleons $\langle W\rangle$ extracted from the Glissando MC model is used to calculate the ratio $\langle π^- \rangle/\langle W\rangle.$ The results are compared to those from other experiments and their dependence on colliding systems and collision energy is discussed.
description: Presented at Critical Point and Onset of Deconfinement 2016 (CPOD2016), Wroc{\l}aw, Poland
Zoomomatopoeia – Exercise Script
Creators: name: Greiner-Petter, Moritz
Publisher: name: Zenodo
Year: 2023

description: "Zoomomatopoeia" is an experimental collective workshop exercise for the online meeting platform "Zoom". It was developed by Moritz Greiner-Petter and first tested during the online workshop "Exercises in Collaborative Formatting" held with members of the Critical Media Lab Basel on 2nd February 2022. This is the script with instructions to recreate the exercise.
Comparison of the Smith-Purcell Radiation Yield for Different Models
Creators: name: Malovytsia, M. S.
name: Delerue, N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Smith-Purcell radiation is used in several applications including the measurement of the longitudinal profile of electron bunches. A correct reconstruction of such profile requires a good understanding of the underlying model. We have compared the leading models of Smith-Purcell radiation and shown that they are in agreement within the experimental errors.
description: 3 pages, 3 figures, 1 table
Spin-Wave Spectrum in Magnetic Nanodot with Continuous Transition between Vortex, Bloch-type Skyrmion and Néel-type Skyrmion States
Creators: name: Mruczkiewicz, Michal
name: Krawczyk, Maciej
name: Guslienko, Konstantin Y.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study spin-wave excitations in a circular ferromagnetic nanodot in different inhomogeneous, topologically non-trivial magnetization states, specifically, vortex and skyrmion states. Gradual change in the strength of the out-of-plane magnetic anisotropy and the Dzyaloshinskii-Moriya exchange interaction leads to continuous phase transitions between different stable magnetic configurations and allows for mapping of dynamic spin modes in and between the vortex, Bloch-type skyrmion and Néel-type skyrmion states. Our study elucidates the connections between gyrotropic modes, azimuthal spin waves and breathing modes in various stable magnetization states and helps to understand the rich spin excitation spectrum on the skyrmion background.
Elastic Model for Dinucleosome Structure and Energy
Creators: name: Fatemi, Hashem
name: Khodabandeh, Fatemeh
name: Mohammad-Rafiee, Farshid
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Biomolecules (q-bio.BM)
subject: Genomics (q-bio.GN)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The equilibrium structure of a Dinucleosome is studied using an elastic model that takes into account the force and torque balance conditions. Using the proper boundary conditions, it is found that the conformational energy of the problem does not depend on the length of the linker DNA. In addition it is shown that the two histone octamers are almost perpendicular to each other and the linker DNA in short lengths is almost straight. These findings could shed some light on the role of DNA elasticity in the chromatin structure.
The elliptic gluon GTMD inside a large nucleus
Creators: name: Zhou, Jian
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We evaluate the elliptic gluon Generalized Transverse Momentum Dependent(GTMD) distribution inside a large nucleus using the McLerran-Venugopalan model. We further show that this gluon distribution can be probed through the angular correlation in virtual photon quasi-elastic scattering on a nucleus.
description: 10 pages, 1 figure
Leaf dicing ninjas: Observations of preconsumptive latex avoidance by a sciurid
Creators: name: Mohan, Kamraj
name: Das, Sayantan
name: Singh, Mewa
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 310901
subject: Animal behaviour
classificationCode: 520401
subject: Cognition
classificationCode: 520406
subject: Sensory processes, perception and performance

description: The folder contains three files. The text file describes the contents of the other files; the Excel file contains processed data used in a manuscript; the video file shows the behavior being reportedThe submitted files are part of the appendix of a research article. The short communication reports hitherto unseen processing of the Artocarpus (jackfruit) leaves by the Indian giant squirrel (Ratufa indica) arguably as a way to avoid leaf latex. The Excel file tabulates the monthly number of focal animal sessions in which Artocarpus leaves were fed by 6 adults followed by information on the phenology of the leaves. There is also information on the estimated number of leaves processed from the number of focal sessions (in which mature leaves were fed). Note that only matured leaves were processed.
Hypergraph Modelling for Geometric Model Fitting
Creators: name: Xiao, Guobao
name: Wang, Hanzi
name: Lai, Taotao
name: Suter, David
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this paper, we propose a novel hypergraph based method (called HF) to fit and segment multi-structural data. The proposed HF formulates the geometric model fitting problem as a hypergraph partition problem based on a novel hypergraph model. In the hypergraph model, vertices represent data points and hyperedges denote model hypotheses. The hypergraph, with large and "data-determined" degrees of hyperedges, can express the complex relationships between model hypotheses and data points. In addition, we develop a robust hypergraph partition algorithm to detect sub-hypergraphs for model fitting. HF can effectively and efficiently estimate the number of, and the parameters of, model instances in multi-structural data heavily corrupted with outliers simultaneously. Experimental results show the advantages of the proposed method over previous methods on both synthetic data and real images.
description: Pattern Recognition, 2016
Mass extinctions and supernova explosions
Creators: name: Korschinek, Gunther
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: A nearby supernova (SN) explosion could have negatively influenced life on Earth, maybe even been responsible for mass extinctions. Mass extinction poses a significant extinction of numerous species on Earth, as recorded in the paleontologic, paleoclimatic, and geological record of our planet. Depending on the distance between the Sun and the SN, different types of threats have to be considered, such as ozone depletion on Earth, causing increased exposure to the Sun's ultraviolet radiation, or the direct exposure of lethal x-rays. Another indirect effect is cloud formation, induced by cosmic rays in the atmosphere which result in a drop in the Earth's temperature, causing major glaciations of the Earth. The discovery of highly intensive gamma ray bursts (GRBs), which could be connected to SNe, initiated further discussions on possible life-threatening events in Earth's history. The probability that GRBs hit the Earth is very low. Nevertheless, a past interaction of Earth with GRBs and/or SNe cannot be excluded and might even have been responsible for past extinction events.
description: Chapter for forthcoming book: Handbook of Supernovae, P. Murdin and A. Alsabeti (eds.), Springer International Publishing (in press)
On stability of cooperative and hereditary systems with a distributed delay
Creators: name: Berezansky, Leonid
name: Braverman, Elena
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 34K20, 92D25, 34K25

description: We consider a system $\displaystyle \frac{dx}{dt}=r_1(t) G_1(x) \left[ \int_{h_1(t)}^t f_1(y(s))~d_s R_1 (t,s) - x(t) \right], \frac{dy}{dt}=r_2(t) G_2(y) \left[ \int_{h_2(t)}^t f_2(x(s))~d_s R_2 (t,s) - y(t)\right]$ with increasing functions $f_1$ and $f_2$, which has at most one positive equilibrium. Here the values of the functions $r_i,G_i,f_i$ are positive for positive arguments, the delays in the cooperative term can be distributed and unbounded, both systems with concentrated delays and integro-differential systems are a particular case of the considered system. Analyzing the relation of the functions $f_1$ and $f_2$, we obtain several possible scenarios of the global behaviour. They include the cases when all nontrivial positive solutions tend to the same attractor which can be the positive equilibrium, the origin or infinity. Another possibility is the dependency of asymptotics on the initial conditions: either solutions with large enough initial values tend to the equilibrium, while others tend to zero, or solutions with small enough initial values tend to the equilibrium, while others infinitely grow. In some sense solutions of the equation are intrinsically non-oscillatory: if both initial functions are less/greater than the equilibrium value, so is the solution for any positive time value. The paper continues the study of equations with monotone production functions initiated in [Nonlinearity, 2013, 2833-2849].
description: 18 pages, 3 figures, published in 2015 in Nonlinearity
Calibration of Herschel SPIRE FTS observations at different spectral resolutions
Creators: name: Marchili, N.
name: Hopwood, R.
name: Fulton, T.
name: Polehampton, E. T.
name: Valtchanov, I.
name: Zaretski, J.
name: Naylor, D. A.
name: Griffin, M. J.
name: Imhof, P.
name: Lim, T.
name: Lu, N.
name: Makiwa, G.
name: Pearson, C.
name: Spencer, L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The SPIRE Fourier Transform Spectrometer on board the Herschel Space Observatory had two standard spectral resolution modes for science observations: high resolution (HR) and low resolution (LR), which could also be performed in sequence (H+LR). A comparison of the HR and LR resolution spectra taken in this sequential mode, revealed a systematic discrepancy in the continuum level. Analysing the data at different stages during standard pipeline processing, demonstrates the telescope and instrument emission affect HR and H+LR observations in a systematically different way. The origin of this difference is found to lie in the variation of both the telescope and instrument response functions, while it is triggered by fast variation of the instrument temperatures. As it is not possible to trace the evolution of the response functions through auxiliary housekeeping parameters, the calibration cannot be corrected analytically. Therefore an empirical correction for LR spectra has been developed, which removes the systematic noise introduced by the variation of the response functions.
description: 13 pages, 17 figures, 4 tables. Accepted for publication in MNRAS
Flow of Power-Law Liquids in a Hele-Shaw Cell Driven by Non-Uniform Electroosmotic Slip in the Case of Strong Depletion
Creators: name: Boyko, Evgeniy
name: Bercovici, Moran
name: Gat, Amir D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We analyze flow of non-Newtonian fluids in a Hele-Shaw cell, subjected to spatially non-uniform electroosmotic slip. Motivated by their potential use for increasing the characteristic pressure fields, we specifically focus on power-law fluids with wall depletion properties. We derive a p-Poisson equation governing the pressure field, as well as a set of linearized equations representing its asymptotic approximation for weakly non-Newtonian behavior. To investigate the effect of non-Newtonian properties on the resulting fluidic pressure and velocity, we consider several configurations in one- and two-dimensions, and calculate both exact and approximate solutions. We show that the asymptotic approximation is in good agreement with exact solutions even for fluids with significant non-Newtonian behavior, allowing its use in the analysis and design of microfluidic systems involving electro-kinetic transport of such fluids.
description: 20 pages, 7 figures
Pay Attention to Mean-Fields during Particle Cloud Generation
Creators: name: Käch, Benno
name: Melzer-Pellmann, Isabell
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023
Subjects: numerical calculations: Monte Carlo
luminosity: high
cloud
stability
correlation
machine learning
neural network
statistical analysis
data analysis method
programming

description: The generation of collider data using machine learning has emerged as a prominent research topic in particle physics due to the increasing computational challenges associated with traditional Monte Carlo simulation methods, particularly for future colliders with higher luminosity. Although generating particle clouds is analogous to generating point clouds, accurately modelling the complex correlations between the particles presents a considerable challenge. Additionally, variable particle cloud sizes further exacerbate these difficulties, necessitating more sophisticated models. In this work, we propose a novel model that utilizes an attention-based aggregation mechanism to address these challenges. The model is trained in an adversarial training paradigm, ensuring that both the generator and critic exhibit permutation equivariance/invariance with respect to their input. A novel feature matching loss in the critic is introduced to stabilize the training. The proposed model performs competitively to the state-of-art whilst having significantly fewer parameters.
Thermodynamic bounds on ultrasensitivity in covalent switching
Creators: name: Owen, Jeremy A.
name: Talla, Pranay
name: Biddle, John W.
name: Gunawardena, Jeremy
Publisher: name: arXiv
Year: 2022
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Switch-like motifs are among the basic building blocks of biochemical networks. A common motif that can serve as an ultrasensitive switch consists of two enzymes acting antagonistically on a substrate, one making and the other removing a covalent modification. To work as a switch, such covalent modification cycles must be held out of thermodynamic equilibrium by continuous expenditure of energy. Here, we exploit the linear framework for timescale separation to establish tight bounds on the performance of any covalent-modification switch, in terms of the chemical potential difference driving the cycle. The bounds apply to arbitrary enzyme mechanisms, not just Michaelis-Menten, with arbitrary rate constants, and thereby reflect fundamental physical constraints on covalent switching.
description: 29 pages, 6 figures
Effects of early predation and social cues on the relationship between laterality and personality in the Threespined stickleback
Creators: name: Panizzon, Paolo
name: Gismann, Jakob
name: Riedstra, Bernd
name: Nicolaus, Marion
name: Brown, Culum
name: Groothuis, Ton
Publisher: name: Zenodo
Year: 2023
Subjects: laterality
Personality
predation cues
developmental environment
stickleback
sociality

description: Individual differences in laterality and personality are expected to covary, as emotions are processed differently by the two hemispheres and personality involves emotional behavior. Fish species are often used to investigate this topic due to the large variability in personality and laterality patterns. While some species show a positive relationship between lateralization strength and boldness, others show a negative relationship, and some show no relationship. To investigate whether this relationship follows changes in laterality and personality, we conducted a fully factorial design experiment manipulating predation and group size during early development. Results showed that the strength of laterality was influenced by predation threat, while social tendency and boldness were influenced by group size. These findings suggest that early life conditions can have an impact on laterality and social behavior. The relationship between laterality and personality traits, while present, was heavily influenced by the specific trial conditions, but not by the different developmental conditions.
description: The files are .xlsx and .docx. An R project with all the statistical analysis is included (.Rproj, .RData and .Rhistory).Funding provided by: Macquarie University
Crossref Funder Registry ID: http://dx.doi.org/10.13039/501100001230
Award Number: Funding provided by: Rijksuniversiteit Groningen
Crossref Funder Registry ID: http://dx.doi.org/10.13039/501100001721
Award Number:
description: This dataset was collected via video analysis. The analysis was conducted both manually by an operator, and via automated software. They are based on the movement of the individuals. The data have then been mostly used raw, and when transformed, it has been clearly stated.
The GALAH Survey: Observational Overview and Gaia DR1 companion
Creators: name: Martell, Sarah
name: Sharma, Sanjib
name: Buder, Sven
name: Duong, Ly
name: Schlesinger, Katharine
name: Simpson, Jeffrey
name: Lind, Karin
name: Ness, Melissa
name: Marshall, Jonathan
name: Asplund, Martin
name: Bland-Hawthorn, Joss
name: Casey, Andrew
name: De Silva, Gayandhi
name: Freeman, Ken
name: Kos, Janez
name: Lin, Jane
name: Zucker, Daniel
name: Zwitter, Tomaz
name: Anguiano, Borja
name: Bacigalupo, Carlos
name: Carollo, Daniela
name: Casagrande, Luca
name: Da Costa, Gary
name: Horner, Jonathan
name: Huber, Daniel
name: Hyde, Elaina
name: Kafle, Prajwal
name: Lewis, Geraint
name: Nataf, David
name: Stello, Dennis
name: Tinney, Chris
name: Watson, Fred
name: Wittenmyer, Rob
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Galactic Archaeology with HERMES (GALAH) Survey is a massive observational project to trace the Milky Way's history of star formation, chemical enrichment, stellar migration and minor mergers. Using high-resolution (R$\simeq$28,000) spectra taken with the High Efficiency and Resolution Multi-Element Spectrograph (HERMES) instrument at the Anglo-Australian Telescope (AAT), GALAH will determine stellar parameters and abundances of up to 29 elements for up to one million stars. Selecting targets from a colour-unbiased catalogue built from 2MASS, APASS and UCAC4 data, we expect to observe dwarfs at 0.3 to 3 kpc and giants at 1 to 10 kpc. This enables a thorough local chemical inventory of the Galactic thin and thick disks, and also captures smaller samples of the bulge and halo. In this paper we present the plan, process and progress as of early 2016 for GALAH survey observations. In our first two years of survey observing we have accumulated the largest high-quality spectroscopic data set at this resolution, over 200,000 stars. We also present the first public GALAH data catalogue: stellar parameters (Teff, log(g), [Fe/H], [alpha/Fe]), radial velocity, distance modulus and reddening for 10680 observations of 9860 Tycho-2 stars that may be included in the first Gaia data release.
description: 35 pages, large table being posted to Vizier, submitted to MNRAS