cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Individual chaotic behaviour of the S-stars in the Galactic centre
Creators: name: Beckers, Sam J.
name: Poppelaars, Colin M.
name: Ulibarrena, Veronica S.
name: Boekholt, Tjarda C. N.
name: Zwart, Simon F. Portegies
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Located at the core of the Galactic Centre, the S-star cluster serves as a remarkable illustration of chaos in dynamical systems. The long-term chaotic behaviour of this system can be studied with gravitational $N$-body simulations. By applying a small perturbation to the initial position of star S5, we can compare the evolution of this system to its unperturbed evolution. This results in the two solutions diverging exponentially, defined by the separation in position space $δ_{r}$, with an average Lyapunov timescale of $\sim$420 yr, corresponding to the largest positive Lyapunov exponent. Even though the general trend of the chaotic evolution is governed in part by the supermassive black hole Sagittarius $\rm A^{*}$ (Sgr $\rm A^{*}$), individual differences between the stars can be noted in the behaviour of their phase-space curves.
 We present an analysis of the individual behaviour of the stars in this Newtonian chaotic dynamical system. The individuality of their behaviour is evident from offsets in the position space separation curves of the S-stars and the black hole. We propose that the offsets originate from the initial orbital elements of the S-stars, where Sgr $\rm A^{*}$ is considered in one of the focal points of the Keplerian orbits. Methods were considered to find a relationship between these elements and the separation in position space. Symbolic regression turns out to provide the clearest diagnostics for finding an interpretable expression for the problem. Our symbolic regression model indicates that $\left\langleδ_r\right\rangle \propto e^{2.3}$, implying that the time-averaged individual separation in position space increases rapidly with the initial eccentricity of the S-stars.
description: Accepted for publication in A&A
Programmable high-dimensional Hamiltonian in a photonic waveguide array
Creators: name: Yang, Yang
name: Chapman, Robert J.
name: Haylock, Ben
name: Lenzini, Francesco
name: Joglekar, Yogesh N.
name: Lobino, Mirko
name: Peruzzo, Alberto
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Waveguide lattices offer a compact and stable platform for a range of applications, including quantum walks, topological effects, condensed matter system simulation, and classical and quantum information processing. In such lattices, the Hamiltonian's hopping and on-site terms determine the optical evolution, which can be engineered using waveguide spacing and refractive index profile. While waveguide lattices have been realized in various photonic platforms, these devices have always been static and designed for specific applications. We present a programmable waveguide array in which the Hamiltonian terms can be electro-optically tuned to implement various Hamiltonian continuous-time evolutions on a single device. We used a single array with 11 waveguides in lithium niobate, controlled via 22 electrodes, to perform a range of experiments that realized the Su-Schriffer-Heeger model, the Aubrey-Andre model, and Anderson localization, which is equivalent to over 2500 static devices. Our architecture's micron-scale local electric fields independently control waveguide coupling coefficients and effective indices, which overcomes cross-talk limitations of thermo-optic phase shifters in other platforms such as silicon, silicon-nitride, and silica. Electro-optic control allows for ultra-fast and more precise reconfigurability with lower power consumption, and with quantum input states, our platform can enable the study of multiple condensed matter quantum dynamics with a single device.
Cheilosia mutabilis
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Cheilosia
Cheilosia mutabilis

description: Cheilosia mutabilis (Fallén, 1817).
Regions: UC, GO, CK, CL, MU, LC, SA.
Reference: Strobl (1910), Vujić (1996), Van Steenis et al. (2013).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 197, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180
Emerging entanglement on network histories
Creators: name: Giavoni, Cecilia
name: Hofmann, Stefan
name: Koegler, Maximilian
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that quantum fields confined to Lorentzian histories of freely falling networks in Minkowski spacetime probe entanglement properties of vacuum fluctuations that extend unrestricted across spacetime regions. Albeit instantaneous field configurations are localized on one-dimensional edges, angular momentum emerges on these network histories and establish the celebrated area scaling of entanglement entropy.
description: 18 pages, 8 figures, minor changes, agrees with publication in Physical Review D
Sachdev-Ye-Kitaev model on a noisy quantum computer
Creators: name: Asaduzzaman, Muhammad
name: Jha, Raghav G.
name: Sambasivam, Bharath
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the SYK model -- an important toy model for quantum gravity on IBM's superconducting qubit quantum computers. By using a graph-coloring algorithm to minimize the number of commuting clusters of terms in the qubitized Hamiltonian, we find the gate complexity of the time evolution using the first-order product formula for $N$ Majorana fermions is $\mathcal{O}(N^5 J^{2}t^2/ε)$ where $J$ is the dimensionful coupling parameter, $t$ is the evolution time, and $ε$ is the desired precision. With this improved resource requirement, we perform the time evolution for $N=6, 8$ with maximum two-qubit circuit depth of 343. We perform different error mitigation schemes on the noisy hardware results and find good agreement with the exact diagonalization results on classical computers and noiseless simulators. In particular, we compute return probability after time $t$ and out-of-time order correlators (OTOC) which is a standard observable of quantifying the chaotic nature of quantum systems.
description: v4: Title change due to editor's request. New result for finiteT OTOC. Version matches to the one accepted for publication in PRD. v2: Fixed typos, added references, and new hardware results. v1: 9 + 6 pages with hardware results with depth & count of 300+ two-qubit gates!
Pressure-tuned superconductivity in the Dirac semimetal PdTe
Creators: name: Kong, Xiangming
name: Liu, Zhaolong
name: Liu, Xiangqi
name: Xu, Chunqiang
name: Yu, Zhenhai
name: Wang, Jing
name: Wang, Baomin
name: Xu, Xiaofeng
name: Guo, Yanfeng
name: Zhang, Rui
name: Yang, Xiaofan
name: Li, Shiyan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report an unusual evolution of superconductivity (SC) in the three-dimensional Dirac semimetal PdTe with increasing pressure up to $\sim$50 GPa. The compressed PdTe exhibits a sudden reversal in the superconducting transition temperature $T\mathrm{_c}$, from an initial decrease with pressure to an increase above a critical pressure $P\mathrm{_c} \approx$ 15 GPa, showing a V-shaped feature composed of SC-I and SC-II phases due to a structural phase transition through $P\mathrm{_c}$. Subsequently, the $T\mathrm{_c}$ goes into a plateau around 2.5 K when the pressure is higher than $\sim$32 GPa. In addition, we find the variations of carrier concentrations and mobilities also manifest a similar trend on the pressure response as the $T\mathrm{_c}$, and the normal-state electronic properties change from the electron-dominated single-band model to two-carrier model after the structural phase transition, implying the close correlation between electronic properties and two SC phases. Our findings establish the SC of PdTe is highly tunable under varying pressures.
description: 7 pages, 5 figures
GuardRails: Automated Suggestions for Clarifying Ambiguous Purpose Statements
Creators: name: Pawagi, Mrigank
name: Kumar, Viraj
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Before implementing a function, programmers are encouraged to write a purpose statement i.e., a short, natural-language explanation of what the function computes. A purpose statement may be ambiguous i.e., it may fail to specify the intended behaviour when two or more inequivalent computations are plausible on certain inputs. Our paper makes four contributions. First, we propose a novel heuristic that suggests such inputs using Large Language Models (LLMs). Using these suggestions, the programmer may choose to clarify the purpose statement (e.g., by providing a functional example that specifies the intended behaviour on such an input). Second, to assess the quality of inputs suggested by our heuristic, and to facilitate future research, we create an open dataset of purpose statements with known ambiguities. Third, we compare our heuristic against GitHub Copilot's Chat feature, which can suggest similar inputs when prompted to generate unit tests. Fourth, we provide an open-source implementation of our heuristic as an extension to Visual Studio Code for the Python programming language, where purpose statements and functional examples are specified as docstrings and doctests respectively. We believe that this tool will be particularly helpful to novice programmers and instructors.
Cheilosia nebulosa Verrall 1871
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Cheilosia
Cheilosia nebulosa

description: Cheilosia nebulosa Verrall, 1871 (new to Slovenia).
Region: UC.
Examined material: ♁, Ribcev laz, 21.v.2009, leg. M. de Groot (M. G. coll.).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 197, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180
title: Interspecies Comparison Of Energy Flow In Some North Atlantic Bivalve Species By Means Of Dynamic Energy Budgets
Creators: name: Cardoso, Joana F.M.F.
name: Van Der Meer, Jaap
name: Van Der Veer, Henk W.
Publisher: name: ASC 2001 - J - Theme session
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.The quantitative aspects of growth and reproduction in four bivalve species (Macoma balthica (L.), Cerastoderma edule (L.), Mya arenaria L., Mytilus edulis L.) in terms of energy flow are described on the basis of a dynamic energy budget (DEB theory; Kooijman, 2000). This theory consists of general assumptions about energy uptake, storage and utilisation and describes an individual by two state variables: structure and reserve, whereby body size exerts its influence through the ratio between surface area and volume. Comparison between model estimates and field data show that the DEB model successfully describes the energetics of growth and reproduction in the various bivalve species. Differences between species could be captured in the same model using different parameter values. Differences between species are reflected not in the volume specific maintenance costs but in the surface area-specific maximum ingestion rate and the energy partitioning over growth and reproduction. According to these parameters at 283 K (10°C), the species could be ranked as follows: fraction of energy allocated to reproduction (-): Mytilus: 0.35; Macoma and Cerastoderma: 0.30 and Mya 0.275; surface area-specific maximum ingestion rate (W m-2): Macoma: 5.2; Cerastoderma: 10.4; Mytilus: 20.8 and Mya: 23.1 W m-2. A comparison between model simulations and field data suggest that growth might to be food limited, however especially in the larger sized species (Mytilus and Mya).
Estimates of Biomass and Fixed Carbon at a Rainforest in Panama
Creators: name: Pinzón, Reinhardt
name: Fábrega, José
name: Vega, David
name: Vallester, Erick N.
name: Aizprúa, Rafael
name: López-Serrano, Francisco R.
name: Ogden, Fred
name: Espino, Kleveer
Publisher: name: University of Wyoming. Libraries
Year: 2012
Subjects: biomass
carbon
climate change
net new carbon increment
Panama
rainforest
re-growth
Engineering

description: This paper presents an estimation of the quantity of carbon fixed in trees in a one hectare (ha) plot at the Cerro Pelado-Gamboa Hydrology Tropical Observatory, which is located in the province of Colon, Panama. The estimation of carbon fixed in trees may provide significant information on carbon flux due to water circulation, which may ultimately enable evaluation of the carbon cycle. All trees larger than 10 cm diameter at breast height (DBH) in the plot were investigated. Carbon fixed within these trees was estimated using a parameterized formula. Tree biomass estimations for the plot were 97.21 Mg ha-1. We identified a rare arboreal pear species (Euphorbiaceous) with higher carbon density than other trees in the plot. The presence of this apparently unique species may be due to specific soil characteristics. The method was evaluated by comparing the results with a second study performed in 2011, which resulted in an estimate of net new carbon (biomass) increment (NNCI), which gives 3.88 Mg ha-1 year-1. In general, the estimation of the biomass and associated carbon content found in this investigation are useful comparative data for economic evaluation of tropical forests in terms of capacity to capture carbon.
Cheilosia nigripes
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Cheilosia
Cheilosia nigripes

description: Cheilosia nigripes (Meigen, 1822).
Regions: UC, GO, CK, CL, SA.
Reference: Glumac (1956), Vujić (1996) (as Nigrocheilosia nigripes), de Groot & Govedič (2008).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 197, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180
VAMPyR -- A High-Level Python Library for Mathematical Operations in a Multiwavelets Representation
Creators: name: Bjørgve, Magnar
name: Tantardini, Christian
name: Jensen, Stig Rune
name: S., Gabriel A. Gerez
name: Wind, Peter
name: Eikås, Roberto Di Remigio
name: Dinvay, Evgueni
name: Frediani, Luca
Publisher: name: arXiv
Year: 2024
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Wavelets and Multiwavelets have lately been adopted in Quantum Chemistry to overcome challenges presented by the two main families of basis sets: Gaussian atomic orbitals and plane waves. In addition to their numerical advantages (high precision, locality, fast algorithms for operator application, linear scaling with respect to system size, to mention a few) they provide a framework which narrows the gap between the theoretical formalism of the fundamental equations and the practical implementation in a working code. This realization led us to the development of the Python library called VAMPyR, (Very Accurate Multiresolution Python Routines). VAMPyR encodes the binding to a C++ library for Multiwavelet calculations (algebra, integral and differential operator application) and exposes the required functionality to write simple Python code to solve among others, the Hartree--Fock equations, the generalized Poisson Equation, the Dirac equation and the time-dependent Schrödinger equation up to any predefined precision. In this contribution we will outline the main features of Multiresolution Analysis using multiwavelets and we will describe the design of the code. A few illustrative examples will show the code capabilities and its interoperability with other software platforms.
Instability of the solitary waves for the 1d NLS with an attrictive delta potential in the degenerate case
Creators: name: Tang, Xingdong
name: Xu, Guixiang
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: Primary: 35L70, Secondary: 35Q55

description: In this paper, we show the orbital instability of the solitary waves $Q_Ωe^{iΩt}$ of the 1d NLS with an attractive delta potential ($γ>0$)
 \begin{equation*}
 ıu_t+u_{xx}+γδu+\abs{u}^{p-1}u=0, \; p>5,
 \end{equation*} where $Ω=Ω(p,γ)>\frac{γ^2}{4}$ is the critical oscillation number and determined by
 \begin{equation*} \frac{p-5}{p-1} \int_{ \arctanh\sts{ \fracγ{2\sqrtΩ} } }^{+\infty} \sech^{\frac{4}{p-1}}\sts{y}\d y =
{ \fracγ{ 2\sqrtΩ } }\sts{ 1-\frac{γ^2}{4Ω} }^{-\frac{p-3}{p-1}} \Longleftrightarrow \mathbf{d}''(Ω) =0.
 \end{equation*} The classical convex method and Grillakis-Shatah-Strauss's stability approach in \cite{A2009Stab, GSS1987JFA1} don't work in this degenerate case, and the argument here is motivated by those in \cite{CP2003CPAM, MM2001GAFA, M2012JFA, MTX2018, O2011JFA}. The main ingredients are to construct the unstable second order approximation near the solitary wave $Q_Ωe^{iΩt}$ on the level set $\Mcal(Q_Ω)$ accoding to the degenerate structure of the Hamiltonian and to construct the refined Virial identity to show the orbital instability of the solitary waves $Q_Ωe^{iΩt}$ in the energy space. Our result is the complement of the results in \cite{FOO2008AIHP} in the degenerate case.
description: 27 pages. Any comment is welcome. arXiv admin note: text overlap with arXiv:1803.06451
title: Deep Soil Microbial Ecology
title: Relationships Between Biotic And Abiotic Properties In Arid And Semi-Arid Soil Profiles
titleType: Subtitle
Creators: name: Naasko, Katherine
Publisher: name: Washington State University
Year: 2022
Subjects: subject: carbon-nitrogen
subject: deep soil
subject: multi-omics
subject: organic matter
subject: soil carbon
subject: Ecology
subject: FOS: Biological sciences
subject: Environmental Management

description: Deep soil health is important to dryland cropping systems in arid and semi-arid areas. For example, in Washington State and the larger inland Pacific Northwest, winter and perennial wheat cropping systems and associated microbiomes rely on water, soluble nutrients, and translocated resources that can accumulate in deep soil horizons. However, deep soil microbial ecology in these systems is not well understood. To investigate relationships between the soil microbial community and soil chemistry, we sampled deep soil cores from: the Palouse soil series (0-85 cm soil depth) from long-term dryland winter wheat and perennial wheatgrass sites in the Palouse River Watershed (Chapters 2 and 3); and the Warden soil series (0-100 cm) from an irrigated perennial wheatgrass site in the Columbia Basin (Chapter 4). In both soils, deep horizons had higher soil pH, exchangeable calcium and magnesium concentrations, and lipid saturation compared to surface soils. In the Palouse soil series, deep horizons had highest relative abundance (%) of Gram(+) bacterial phospholipid fatty acids (PLFAs) and lowest abundance of fungal and Gram(-) bacterial PLFAs compared to surface soils. In the Warden soil series, deep horizons had highest levels of several organic acids, triacylglycerols, and inorganic carbon in the form of calcium carbonates and lowest abundance of several simple sugars and sugar alcohols. Also in Warden soils, there were strong depth effects on untargeted soil multi-omics that signal osmotic and oxidative stress that were not reflected in compositional shifts in the soil microbial community assessed via amplicon sequencing of 16S (bacteria and archaea) and ITS (fungi) genes. Changes in smaller, extractable carbon and nitrogen pools in Palouse soils were also observed. These studies highlighted the importance of targeting specific carbon and nitrogen pools and metabolites instead of total pools or bulk measures, based on the research question and system under study. This research illustrates the value in sampling at least one meter deep to understand microbial and plant interactions with soil carbon and nitrogen in arid and semi-arid soils. Understanding deep soil ecology will be imperative to further soil health management practices that promote long-term carbon sequestration in low water and resource environments.
Ökologische Folgen der Konflikte in Sri Lanka (Teil 2)
Creators: name: Jayapalan, V.I.S.
name: Blettner, Maria
Publisher: name: Südasien
Year: 2024

description: Südasien, Bd. 12 Nr. 8 (1992): Naturgestaltung von Menschenhand -Das Narmada-Projekt-
title: Spring Spawning And Early Nursery Zone Of The Mesopelagic Fish Maurolicus Parvipinnis At The Coastal Upwelling Zone Off Talcahuano, Central Chile - Cm 20
Creators: name: Landaeta, M.F.
name: Castro, L.R.
Publisher: name: ASC 2001 - J - Theme session
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Little is known about the reproductive strategies of mesopelagic fishes In the Humboldt Current System and their utilization of highly productive coastal upwelling areas for spawning and early development. In the present study, we first document the spawning and nursery area of the highly abundant mesopelagic fish Maurolicus parvipinnis in the coastal upwelling zone off Talcahuano, central Chile. Second, we propose a mechanism by which ontogenetic and diel changes in vertical distribution of the early life history stages and the utilization of the local hydrodynamics facilitates the development of the larvae of this species over the shelf and nearby slope in a highly productive environment. The spawning strategy here described, may be a more common feature than previously believed for Maurolicus species, especially along coastal upwelling areas in eastern boundary currents
Reconnaissance with JWST of the J-region Asymptotic Giant Branch in Distance Ladder Galaxies: From Irregular Luminosity Functions to Approximation of the Hubble Constant
Creators: name: Li, Siyang
name: Riess, Adam G.
name: Casertano, Stefano
name: Anand, Gagandeep S.
name: Scolnic, Daniel M.
name: Yuan, Wenlong
name: Breuval, Louise
name: Huang, Caroline D.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study stars in the J-regions of the asymptotic giant branch (JAGB) of near-infrared color magnitude diagrams in the maser host NGC 4258 and 4 hosts of 6 Type Ia supernovae (SN Ia): NGC 1448, NGC 1559, NGC 5584, and NGC 5643. These clumps of stars are readily apparent near $1.0
description: 28 pages, 21 figures, 8 tables, Accepted by ApJ
Cheilosia nivalis Becker 1894
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Cheilosia
Cheilosia nivalis

description: Cheilosia nivalis Becker, 1894 (new to Slovenia).
Regions: UC, GO.
Records: ♀, Triglav National Park, Stara Fužina, 26.vi.2022. leg. A. Vujić, M. Janković Milosavljević, T. Tot (FSUNS); ♀, Triglav National Park, 27.vi.2022. leg. A. Vujić, M. Janković Milosavljević, T. Tot (FSUNS).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 197, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180
Automatic Differentiability and Characterization of Cocycles of Holomorphic Flows
Creators: name: Jafari, Farhad
name: Tonev, T.
name: Toneva, E.
Publisher: name: University of Wyoming. Libraries
Year: 2005
Subjects: subject: flow
subject: cocycle
subject: infinitesimal generator
subject: Mathematics
subject: FOS: Mathematics

description: In this paper we prove that cocycles of holomorphic flows on domains in the complex plane are automatically differentiable with respect to the flow parameter, and their derivatives are holomorphic functions. We use this result to show that, on simply connected domains, an additive cocycle is a coboundary if and only if this cocycle vanishes at the fixed point of the flow.
Instability of the solitary waves for the generalized derivative nonlinear Schrödinger equation in the degenerate case
Creators: name: Miao, Changxing
name: Tang, Xingdong
name: Xu, Guixiang
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper, we develop the modulation analysis, the perturbation argument and the Virial identity similar as those in \cite{MartelM:Instab:gKdV} to show the orbital instability of the solitary waves $\Q\sts{x-ct}\e^{ıωt}$ of the generalized derivative nonlinear Schrödinger equation (gDNLS) in the degenerate case $c=2z_0\sqrtω$, where $z_0=z_0\stsσ $ is the unique zero point of $F\sts{z;~σ}$ in $\sts{-1, ~ 1}$. The new ingredients in the proof are the refined modulation decomposition of the solution near $\Q$ according to the spectrum property of the linearized operator $\Scal_{ω, c}"\sts{\Q}$ and the refined construction of the Virial identity in the degenerate case. Our argument is qualitative, and we improve the result in \cite{Fukaya2017}.
description: 33 pages, 2 figures, all comments are welcome
Revolution in the Andes: The Age of Túpac Amaru
Creators: name: Schultz, Ronald
Publisher: name: University of Wyoming. Libraries
Year: 2014
Subjects: History

description: Growing influence of Augustinian thought also pushed sixteenth-century clergy toward a dimmer view of their Indian charges (but also, significantly, all Christians). Similarly, Jackson’s thesis that missionary attitudes, as reflected through visual evidence, experienced a distinct ebb and flow might have been more fully and profitably compared to recent historians’ analyses of traditional textual evidence that favour the view that Spanish attitudes toward indigenous spirituality were more consistently pessimistic, informed as they were by the demonic tropes of the era. Finally, given the importance of the Last Judgment to his argument, it is regrettable that Jackson does not address literary scholar Michael Schuessler’s recent book (originally published in Mexico in 2009) which links the murals of Actopan and Ixmiquilpan to Franciscan missionary theatre, another important evangelical medium that began decades earlier, at the apex of missionary optimism, with elaborate and harrowing re-enactments of Christ’s ultimate judgment of sinners.
title: System Dynamics Of The Barents Sea Capelin
Creators: name: Yndestad, Harald
name: Stene, Anne
Publisher: name: ASC 2001 - J - Theme session
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.The capelin (Mallotus villosus) has a northerly circumpolar distribution. In the Atlantic the capelin is located in the Barents Sea, Iceland, Greenland, Labrador and Newfoundland. The capelin stock in the Barents Sea is the largest in the world and has a key role in the Arctic food chain. The large fluctuations of the biomass have been poorly understood and collapses in the biomass have been registered. In the presented paper a system analysis of the capelin stock has identified a state dynamic model and a frequency dynamic model of the stock properties. The results show the capelin stock dynamics is adapted to the deterministic 18.6 yrs and 18.6/3=6.2 yrs Earth nutation cycles. The most important cycle is the 6.2 yrs cycle, which is identified in the recruitment, maturity and growth. A frequency transform of the estimated model shows a stochastic resonance at about the half of the 6.2 yrs cycle. The stochastic resonance shows that fluctuation of stock number is a natural adoption to the environment and a strategy for optimal growth and survival in the long run. In this stochastic resonance is timing between stock number fluctuation and the 6.2 yrs cycle of most importance.
title: A Comparison Of Variability And Bias When Ageing Northeastern Atlantic Minke Whales (Balaenoptera Acutorostrata) By Counting Growth Layer Groups In The Mandible And Bulla Tympanica
Creators: name: Olsen, Erik
name: Skaug, H.J.
name: Leithe, A.
name: Bergflødt, B.
name: Fagerheim, K.A.
Publisher: name: ASC 2001 - J - Theme session
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.The age of 43 minke whales (Balaenoptera acutorostrata) was estimated by counting growth layer groups (GLGs) GLGs in 500 thick haemotoxylin stained transverse sections of left and right mandible.
Cheilosia orthotricha Vujic & Claussen 1994
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Cheilosia
Cheilosia orthotricha

description: Cheilosia orthotricha Vujić & Claussen, 1994.
Region: UC.
Reference: Van Steenis et al. (2013).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 197, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180
Tracking Superharmonic Resonances for Nonlinear Vibration of Conservative and Hysteretic Single Degree of Freedom Systems
Creators: name: Porter, Justin H.
name: Brake, Matthew R. W.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Many modern engineering structures exhibit nonlinear vibration. Characterizing such vibrations efficiently is critical to optimizing designs for reliability and performance. For linear systems, steady-state vibration occurs only at the forcing frequencies. However, nonlinearities (e.g., contact, friction, large deformation, etc.) can result in nonlinear vibration behavior including superharmonics - responses at integer multiples of the forcing frequency. When the forcing frequency is near an integer fraction of the natural frequency, superharmonic resonance occurs, and the magnitude of the superharmonics can exceed that of the fundamental harmonic that is externally forced. Characterizing such superharmonic resonances is critical to improving engineering designs. The present work extends the concept of phase resonance nonlinear modes (PRNM) to be applicable to general nonlinearities, and is demonstrated for eight different nonlinear forces. The considered forces include stiffening, softening, contact, damping, and frictional nonlinearities that have not been previously considered with PRNM. The proposed variable phase resonance nonlinear modes (VPRNM) method can accurately track superharmonic resonances for hysteretic nonlinearities that exhibit amplitude dependent phase resonance conditions that cannot be captured by PRNM. The proposed method allows for characterization of superharmonic resonances without constructing a full frequency response curve at every force level with the harmonic balance method. Thus, the present method allows for analysis of potential failures due to large amplitudes near the superharmonic resonance with reduced computational cost. The consideration of single degree of freedom systems in the present paper provides insights into superharmonic resonances and a basis for understanding internal resonances for multiple degree of freedom systems.
description: 57 pages, 24 figures; published at the journal Mechanical Systems and Signal Processing; revisions for clarifications from peer review, results are unchanged
Vietoris-Rips Persistent Homology, Injective Metric Spaces, and The Filling Radius
Creators: name: Lim, Sunhyuk
name: Memoli, Facundo
name: Okutan, Osman Berat
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Topology (math.AT)
subject: Computational Geometry (cs.CG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In the applied algebraic topology community, the persistent homology induced by the Vietoris-Rips simplicial filtration is a standard method for capturing topological information from metric spaces. In this paper, we consider a different, more geometric way of generating persistent homology of metric spaces which arises by first embedding a given metric space into a larger space and then considering thickenings of the original space inside this ambient metric space. In the course of doing this, we construct an appropriate category for studying this notion of persistent homology and show that, in a category theoretic sense, the standard persistent homology of the Vietoris-Rips filtration is isomorphic to our geometric persistent homology provided that the ambient metric space satisfies a property called injectivity.
 As an application of this isomorphism result we are able to precisely characterize the type of intervals that appear in the persistence barcodes of the Vietoris-Rips filtration of any compact metric space and also to give succinct proofs of the characterization of the persistent homology of products and metric gluings of metric spaces. Our results also permit proving several bounds on the length of intervals in the Vietoris-Rips barcode by other metric invariants. Finally, as another application, we connect this geometric persistent homology to the notion of filling radius of manifolds introduced by Gromov \cite{G07} and show some consequences related to (1) the homotopy type of the Vietoris-Rips complexes of spheres which follow from work of M.~Katz and (2) characterization (rigidity) results for spheres in terms of their Vietoris-Rips persistence barcodes which follow from work of F.~Wilhelm.
description: We added Remark 9.8
Cheilosia pagana
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Cheilosia
Cheilosia pagana

description: Cheilosia pagana (Meigen, 1822).
Regions: UC, GO, CA, CL, DR, LS, LC, SA.
Reference: Coe (1960) (as Cheilosia paganus), Lambeck (1968), Vujić (1996), de Groot (2004), de Groot & Govedič (2008), Van Steenis et al. (2013).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 198, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180
title: Calculation Of The Spawning-Stock Biomass Of Sprat In The Gotland Basin (Eastern Baltic Sea) With The Hensen - Apstein Method
Creators: name: Makarchouk, Andrei
name: Yula, Edmund
Publisher: name: ASC 2001 - J - Theme session
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Spawning-stock biomass of sprat (Sprattus sprattus balticus Schneider) has been calculated for the years 1999 and 2000 using the data bases of Latvian Fisheries Research Institute on ichthyoplankton and hydrography. Investigations with BIOMOC multiple opening/closing net in the second half of the 1990s provided us with the knowledge of the vertical distribution of sprat eggs and the regularities of its changes during the spawning season. It allowed to determine the temperature of ambient water and thus the duration of the developmental stages. Horizontal distribution of the sprat eggs in different months was taken from the ichthyoplankton surveys carried out with the vertically operated ichthyoplankton net. After the calculation of mortality rates we could draw the maps of horizontal distribution of daily production of sprat eggs on the 1st stage, and then calculated the seasonal production, which gave the number of spawning females in the investigated area. Fecundity of fishes was defined dependently on their mean weight in the spawning stock for each year. The obtained results have been compared with the ones from hydroacoustic surveys when it was possible. The spawning-stock biomass of sprat was calculated in 2 versions: precautious and taking into account possible elimination of eggs in the lower part of the water column.
The multi-wavelength phase curves of small bodies: Phase coloring
Creators: name: Alvarez-Candal, Alvaro
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context. Small bodies change their brightness due to different motives: Rotation along their axis or axes, combined with irregular shapes and/or changing surface properties, or changes in the geometry of observations. In this work, we tackle the problem of Phase curves, which show the change in brightness due to changes in the fraction of illuminated surface as seen by the observer. Aims. We aim to study the effect of the phase curves in the five wavelengths of the Sloan Digital Sky Survey in scores of objects (several tens of thousands), focusing particularly on the spectral slopes and the colors and their changes with phase angle. Methods. We used a Bayesian inference method and Monte Carlo techniques to retrieve the absolute magnitudes in five wavelengths, using the results to study the phase coloring effect in different bins of the semi-major axis. Results. We obtained absolute magnitudes in the five filters for over 40 000 objects. Although some outliers are identified, most of the usual color-color space is recovered by the data presented. We also detect a dual behavior in the spectral slopes, with a change at ${α\approx}$ 5 deg.
description: 10 pages, 13 figures, 2 appendixes. Accepted for publication in A&A on Feb 16, 2024
title: Non-Predation Natural Mortality Of Norway Pout (Trisopterus Esmarkii) In The North Sea.
Creators: name: Sparholt, Henrik
name: Larsen, Lena I.
name: Nielsen, J. Rasmus
Publisher: name: ASC 2001 - J - Theme session
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Based on catch rates at age in bottom trawl surveys, commercial catch at age, and stomach content data of the main piscivorous fish in the North Sea new estimates of non-predation natural mortality, M1, are obtained for Norway pout (Trisopterus esmarkii (Nilsson)). Simple catch curve type analysis and rough maximum likelihood procedures are applied. M1 of Norway pout increases with age and gets very high for age 2 and older fish (0.07 for age 0, 0.13 for age 1, 1.82 for age 2, 2.84 for age 3 and 3.74 for age 4). Survey data from each of the 4 quarters of the year show that the main mortality takes place between the 1st and the 2nd quarter of the year, i.e. from before to after spawning, thus pointing at spawning as the main factor. However, a lack of correlation between annual total mortality of age 1 and annual percentage mature Norway pout of age 1 points away from spawning as the main factor. An alternative hypothesis is that growth stress is the main factor. There are no reasons to believe that M1 has changed considerable over the recent decades.
Deformation theory of Cohomological Field Theories
Creators: name: Dotsenko, Vladimir
name: Shadrin, Sergey
name: Vaintrob, Arkady
name: Vallette, Bruno
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 18M85, 18G85, 18M70, 53D55, 14H10, 53D45

description: We develop the deformation theory of cohomological field theories (CohFTs), which is done as a special case of a general deformation theory of morphisms of modular operads. This leads us to introduce two new natural extensions of the notion of a CohFT: homotopical (necessary to structure chain-level Gromov--Witten invariants) and quantum (with examples found in the works of Buryak--Rossi on integrable systems). We introduce a new version of Kontsevich's graph complex, enriched with tautological classes on the moduli spaces of stable curves. We use it to study a new universal deformation group which acts naturally on the moduli spaces of quantum homotopy CohFTs, by methods due to Merkulov--Willwacher. This group is shown to contain both the prounipotent Grothendieck--Teichmüller group and the Givental group.
description: submitted version, 57 pages, abstract and introduction rewritten
Wearable Micro-GSR Sensor with Amplification and Conversion
Creators: name: Mendoza, Sarah Alicia
Publisher: name: Washington State University
Year: 2022
Subjects: GSR
Sensors
Wearable

description: Galvanic skin response (GSR) is the change in electrical properties on the skin caused by either environmental changes or changes in an individual’s emotional/cognitive state. Studies have shown that there is a direct relationship between brain regions and their influence on EDR. Several off the shelf GSR sensors solutions are expensive, inaccurate, and invasive for an individual. This paper describes the design of a custom wearable device that measures electrodermal changes and displays the results on a PC. The results indicate that the GSR sensor serves as a highly accurate, low cost, battery-operated solution. Future applications of this wearable sensor may include monitoring stress levels of those with dementia, anxiety, and PTSD to name a few.
title: Biometric Relationships To Estimate Length And Weight Of Leucoraja Naevus Raja Montagui And And Raja Clavata From Wings Landings In Cantabriam Sea
Creators: name: Fernández, A.
name: Rodriguez-Cabello, C.
name: Olaso, I.
name: Sánchez, F.
name: Serrano, A.
Publisher: name: ASC 2001 - J - Theme session
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.The scarce elasmobranchelasmobranch information existing nowadays has received rapidly growing world-wide attention in targeted fisheries, and also as a by-catch in other fisheries. The landings of rays are information existing nowadays has received rapidly growing world-wide attention in targeted fisheries, and also as a by-catch in other fisheries. The landings of rays are significant as by-catch in the North of Spain fisheries, and not always individuals are landed whole (Figure 1). The ray wings are cut on board of commercial vessels, and this landing are recorded by fish-significant as by-catch in the North of Spain fisheries, and not always individuals are landed whole (Figure 1). The ray wings are cut on board of commercial vessels, and this landing are recorded by fish-markets. One of the objectives of DELASS project (Development of markets. One of the objectives of DELASS project (Development of ElasmobranchElasmobranch Assessments ) is to obtain reliable data into a particular area. To know the round fresh weight and landing length Assessments ) is to obtain reliable data into a particular area. To know the round fresh weight and landing length distributions, in this poster we present the degree of existent correlation among certain dimensional characteristics.distributions, in this poster we present the degree of existent correlation among certain dimensional characteristics.
title: Age And Growth Of Northeast Atlantic Mackerel (Scomber Scombrus) In Waters Of The North And Northwest Of Spain (Ices Divisions Viiic And Ixa North),1990-2000
Creators: name: Villamor, Begoña
name: Abaunza, Pablo
name: Fariña, Celso
Publisher: name: ASC 2001 - J - Theme session
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.This paper analyses the growth of Northeast Atlantic mackerel (Scomber scombrus Linnaeus, 1758) in waters of the North and Northwest of Spain (ICES Divisions VIIIc and IXa North), in the period 1990-2000. Age was determined by means of the interpretation and counting of growth rings on the otoliths (sagitta) of 7732 individuals caught during the spawning season by the commercial fleet and on fisheries research surveys. Length distributions by age group were compared by applying non-parametric tests (Kruskal-Wallis and Kolgomorov-Smirnov). Significant differences were found (p<0.05) among the years analysed, with high variability to age 7.
Right-angled Artin subgroups of right-angled Coxeter and Artin groups
Creators: name: Dani, Pallavi
name: Levcovitz, Ivan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 20F65, 20F55

description: We determine when certain natural classes of subgroups of right-angled Coxeter groups (RACGs) and right-angled Artin groups (RAAGs) are themselves RAAGs. We characterize finite-index visual RAAG subgroups of 2-dimensional RACGs. As an application, we show that any 2-dimensional, one-ended RACG with planar defining graph is quasi-isometric to a RAAG if and only if it is commensurable to a RAAG. Additionally, we give new examples of RACGs with non-planar defining graphs which are commensurable to RAAGs.
 Finally, we give a new proof of a result of Dyer: every subgroup generated by conjugates of RAAG generators is itself a RAAG.
description: 40 pages, 15 figures. Incorporated the referee's comments. Added attribution to Dyer for Theorem D. To appear in Algebraic and Geometric Topology
Cheilosia pedemontana Rondani 1857
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Cheilosia
Cheilosia pedemontana

description: Cheilosia pedemontana Rondani, 1857 (new to Slovenia).
Region: GO.
Examined material: ♁, Triglav, Krnsko jezero, 5.vi.2019, leg. A. Vujić, D. Milić, A. Šebić, L. Velaja (FSUNS).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 198, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180