cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Colossal Seebeck coefficient in Aurivillius Phase-Perovskite Oxide Composite
Creators: name: Kumar, Ashutosh
name: Sivaprahasam, D.
name: Thakur, Ajay D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose an inexpensive scalable approach for achieving extremely high values of Seebeck coefficient ($α$) by exploiting the natural superlattice structure in Aurivillius phase oxides. In particular, we report an $α\approx $ 319\,mV/K at 300\,K in a composite of Aurivillius phase compound SrBi$_4$Ti$_4$O$_{15}$ (as a matrix) and a perovskite phase material (e.g., La$_{0.7}$Sr$_{0.3}$MnO$_3$ or, La$_{0.7}$Sr$_{0.3}$CoO$_3$ as filler). Such a colossal value of $α$ can be attributed to contributions from the enhanced density of states due to the effective low dimensional character of Bi$_2$O$_2$ layer. The corresponding thermal conductivity ($κ$) and the electrical conductivity ($σ$) lies in the range 0.7 - 1.25 W/m-K and 10 - 100 $μ$S/m, respectively at 300\,K. Attributed to the high $α$ values, such oxide composites can be used as thermopile sensors and highly sensitive bolometric applications. We anticipate that the demonstration of colossal $α$ in oxide composites using a simple synthesis strategy also sets the stage for future material innovations for high temperature thermoelectric applications.
description: 5 figures, 1 table
Support Aggregate Analytic Window Function over Large Data by Spilling
Creators: name: Shi, Xing
name: Wang, Chao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Analytic function, also called window function, is to query the aggregation of data over a sliding window. For example, a simple query over the online stock platform is to return the average price of a stock of the last three days. These functions are commonly used features in SQL databases. They are supported in most of the commercial databases. With the increasing usage of cloud data infra and machine learning technology, the frequency of queries with analytic window functions rises. Some analytic functions only require const space in memory to store the state, such as SUM, AVG, while others require linear space, such as MIN, MAX. When the window is extremely large, the memory space to store the state may be too large. In this case, we need to spill the state to disk, which is a heavy operation. In this paper, we proposed an algorithm to manipulate the state data in the disk to reduce the disk I/O to make spill available and efficienct. We analyze the complexity of the algorithm with different data distribution.
description: 6 pages, conference
Analytic theory of finite asymptotic expansions in the real domain. Part I: two-term expansions of differentiable functions
Creators: name: Granata, Antonio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: It is our aim to establish a general analytic theory of asymptotic expansions of type f(x)=a_1 phi_1(x)+dots+ a_n phi_n(x)+o(phi_n(x)), x tends to x_0 (*), where the given ordered n-tuple of real-valued functions phi_1 dots,phi_n forms an asymptotic scale at x_0. By analytic theory, as opposed to the set of algebraic rules for manipulating finite asymptotic expansions, we mean sufficient and/or necessary conditions of general practical usefulness in order that (*) hold true. Our theory is concerned with functions which are differentiable (n-1) or n times and the presented conditions involve integro-differential operators acting on f, phi_1, dots, phi_n. We essentially use two approaches; one of them is based on canonical factorizations of nth-order disconjugate differential operators and gives conditions expressed as convergence of certain improper integrals, very useful for applications. The other approach, valid for (n-1)-time differentiable functions starts from simple geometric considerations (as old as Newton's concept of limit tangent) and gives conditions expressed as the existence of finite limits, as x tends to x_0, of certain Wronskian determinants constructed with f, phi_1, dots, phi_n. There is a link between the two approaches and it turns out that the integral conditions found via the factorizational approach have striking geometric meanings. Our theory extends to general expansions the theory of polynomial asymptotic expansions thoroughly investigated in a previous paper. In the first part of our work we study the case of two comparison functions phi_1, phi_2. The theoretical background for the two-term theory is much simpler than that for n >=3 and, in addition, it is unavoidable to separate the treatments as the two-term formulas must be explicitly written lest they become unreadable.
description: The present e-paper coincides with the same-titled article published in Analysis Mathematica, except for minor typographical alterations, for the addtion of a last section (9) discussing a nontrivial Tauberian problem, and for a list of corrections of misprints reported after the references, misprints that have been corrected in this version
RID study Cleaning solar panels
Creators: name: Yannou, Bernard
name: Vallet, Flore
name: Lang, Tobias
name: Benadada, Ilyas
name: Dupont, Antoine
name: Kohno, Aleksandrs
name: Soukoundjo, Christian
Publisher: name: Zenodo
Year: 2024

description: The company we worked with has solar farms all over the world, of all sizes, generations, and technologies (Figure 5). One problem that plagues operators is the fouling of solar panels. You can tolerate up to 30% less irradiation before you must clean them. This cleaning is expensive, immobilizes the installations for the duration of the operation and contributes to wear and tear on the panel coating, hence the need to find a clever compromise when it comes to knowing when to intervene for cleaning. The qualities of the overall product-service-organization solution have a major influence on this compromise, which represents a major challenge in terms of electricity production gains. This company has been trying to find suitable industrial solutions for years. The problem is that there are many techniques available, and they are all adapted to economic, climatic, and local labor situations. The company called on us to (a) pose the problem of matching supply (existing solutions on the market) and demand (their needs in terms of pain to be reduced and gains to be made), (b) determine one or more priorities for where to innovate, and therefore determine a motivated innovation brief, and (c) ideate and propose a brand new solution surpassing the existing ones on the targeted market.
Metric Dimension of Amalgamation of Graphs
Creators: name: Simanjuntak, Rinovia
name: Uttunggadewa, Saladin
name: Saputro, Suhadi Wido
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C12

description: A set of vertices $S$ resolves a graph $G$ if every vertex is uniquely determined by its vector of distances to the vertices in $S$. The metric dimension of $G$ is the minimum cardinality of a resolving set of $G$. Let $\{G_1, G_2, \ldots, G_n\}$ be a finite collection of graphs and each $G_i$ has a fixed vertex $v_{0_i}$ or a fixed edge $e_{0_i}$ called a terminal vertex or edge, respectively. The \emph{vertex-amalgamation} of $G_1, G_2, \ldots, G_n$, denoted by $Vertex-Amal\{G_i;v_{0_i}\}$, is formed by taking all the $G_i$'s and identifying their terminal vertices. Similarly, the \emph{edge-amalgamation} of $G_1, G_2, \ldots, G_n$, denoted by $Edge-Amal\{G_i;e_{0_i}\}$, is formed by taking all the $G_i$'s and identifying their terminal edges. Here we study the metric dimensions of vertex-amalgamation and edge-amalgamation for finite collection of arbitrary graphs. We give lower and upper bounds for the dimensions, show that the bounds are tight, and construct infinitely many graphs for each possible value between the bounds.
description: 9 pages, 2 figures, Seventh Czech-Slovak International Symposium on Graph Theory, Combinatorics, Algorithms and Applications (CSGT2013), revised version 21 December 2013
Spin relaxation related to the edge scattering in graphene
Creators: name: Dugaev, V. K.
name: Katsnelson, M. I.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We discuss the role of spin-flip scattering of electrons from the magnetized edges in graphene nanoribbons. The spin-flip scattering is associated with strong fluctuations of the magnetic moments at the edge. Using the Boltzmann equation approach, which is valid for not too narrow nanoribbons, we calculate the spin relaxation time in the case of Berry-Mondragon and zigzag graphene edges. We also consider the case of ballistic nanoribbons characterized by very long momentum relaxation time in the bulk, when the main source of momentum and spin relaxation is the spin-dependent scattering at the edges. We found that in the case of zigzag edges, an anomalous spin diffusion is possible, which is related to very weak spin-flip scattering of electrons gliding along the nanoribbon edge.
description: 9 pages, 7 figures
A Comparative Analysis of Glass Plate Digitization Methods: Methods Motivated by Stellar Variability
Creators: name: Escapa, Isaiah
name: Glusman, Rowen
name: Kovach-Fuentes, Rachel
name: Cerny, William
name: Martinez, Michael N.
name: Kron, Richard G.
name: Muratore, Amanda
name: Chapman, Ali
name: Scott, Audrey Paris
name: Babnigg, Daniel
Publisher: name: Unknown
Year: 2022
Subjects: subject: Yerkes Observatory
subject: Flatbed scanner
subject: DSLR camera
subject: History of astronomy
subject: Stellar variability
subject: Digitization

description: Presented at the 2022 Midstates Consortium for Math and Science Undergraduate Research Symposia, this poster details the research and analysis of digitization of historic astronomical glass plates using a a graphic arts flatbed scanner and a DSLR camera.
Agrypnus angulosus Hayek 1979
Creators: name: Kotru, Akash
name: Chandran, Nithya
name: Dubey, Anil Kumar
name: Prosvirov, Alexander S.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Elateridae
Agrypnus
Agrypnus angulosus

description: Agrypnus angulosus (Candèze, 1857)
Lacon angulosus Candèze, 1857: 117.
Adelocera angulosus (Candèze) Fleutiaux, 1926: 96.
Agrypnus angulosus (Candèze) Hayek, 1979: 207.
Type depository. unknown (probably IZPAN).
Type locality. “ Probablement des Indes-Orientales ”.
Distribution. India: Tripura (Biswas, Chakraborty, 2000).
Literature. Candèze (1857: 117): original description; Fleutiaux (1926: 96): combination; Hayek (1979: 207): combination; Biswas and Chakraborty (2000: 101): faunistics.
description: Published as part of Kotru, Akash, Chandran, Nithya, Dubey, Anil Kumar & Prosvirov, Alexander S., 2025, A catalogue of Indian Agrypninae Candèze, 1857 (Coleoptera: Elateridae), pp. 1-66 in Zootaxa 5614 (1) on page 12, DOI: 10.11646/zootaxa.5614.1.1, http://zenodo.org/record/15217075
Point-pushing actions for manifolds with boundary
Creators: name: Palmer, Martin
name: Tillmann, Ulrike
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 55R80, 57N65, 55R10, 20F38

description: Given a manifold $M$ and a point in its interior, the point-pushing map describes a diffeomorphism that pushes the point along a closed path. This defines a homomorphism from the fundamental group of $M$ to the group of isotopy classes of diffeomorphisms of $M$ that fix the basepoint. This map is well-studied in dimension $d = 2$ and is part of the Birman exact sequence. Here we study, for any $d \geqslant 3$ and $k \geqslant 1$, the map from the $k$-th braid group of $M$ to the group of homotopy classes of homotopy equivalences of the $k$-punctured manifold $M \smallsetminus z$, and analyse its injectivity. Equivalently, we describe the monodromy of the universal bundle that associates to a configuration $z$ of size $k$ in $M$ its complement, the space $M \smallsetminus z$. Furthermore, motivated by our work on the homology of configuration-mapping spaces, we describe the action of the braid group of $M$ on the fibres of configuration-mapping spaces.
description: 33 pages, 8 figures. Final version; to appear in Groups, Geometry, and Dynamics. v3: Added new section 8 about the kernel of the point-pushing map. v2: Added new section 7 with examples
The ITensor Software Library for Tensor Network Calculations
Creators: name: Fishman, Matthew
name: White, Steven R.
name: Stoudenmire, E. Miles
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Software (cs.MS)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: ITensor is a system for programming tensor network calculations with an interface modeled on tensor diagram notation, which allows users to focus on the connectivity of a tensor network without manually bookkeeping tensor indices. The ITensor interface rules out common programming errors and enables rapid prototyping of tensor network algorithms. After discussing the philosophy behind the ITensor approach, we show examples of each part of the interface including Index objects, the ITensor product operator, tensor factorizations, tensor storage types, algorithms for matrix product state (MPS) and matrix product operator (MPO) tensor networks, quantum number conserving block-sparse tensors, and the NDTensors library. We also review publications that have used ITensor for quantum many-body physics and for other areas where tensor networks are increasingly applied. To conclude we discuss promising features and optimizations to be added in the future.
description: Submitted to SciPost Physics Codebases. Version 2 contains benchmarks of ITensor C++ and Julia versions, and link to external benchmarks including TeNPy software
Ichneumonidae Latreille
Creators: name: Lopes, Thomas
name: Libert, Pierre-Nicolas
name: Starý, Petr
name: Japoshvili, George
name: Hatt, Séverin
name: Francis, Frédéric
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae

description: Superfamily Ichneumonidae Latreille
description: Published as part of Lopes, Thomas, Libert, Pierre-Nicolas, Starý, Petr, Japoshvili, George, Hatt, Séverin & Francis, Frédéric, 2016, Checklist of Aphidiinae (Hymenoptera: Braconidae) and Aphelinus (Hymenoptera: Aphelinidae) species from Belgium with respectively four and three new records, pp. 548-560 in Zootaxa 4092 (4) on page 549, DOI: 10.11646/zootaxa.4092.4.5, http://zenodo.org/record/264575
Thermal conductivity of PbTe-CoSb3 bulk polycrystalline composite: the role of microstructure and interface thermal resistance
Creators: name: Kosonowski, Artur
name: Kumar, Ashutosh
name: Parashchuk, Taras
name: Cardoso-Gil, Raul
name: Wojciechowski, Krzysztof T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Systematic experimental and theoretical research on the role of microstructure and interface thermal resistance on the thermal conductivity of the PbTe-CoSb3 bulk polycrystalline composite is presented. In particular, the correlation between the particle size of the dispersed phase and interface thermal resistance (R_{int}) on the phonon thermal conductivity (κ_{ph}) is discussed. With this aim, a series of PbTe-CoSb_3 polycrystalline composite materials with the different particle sizes of CoSb_3 was prepared. The structural (XRD) and microstructural analysis (SEM/EDXS) confirmed assumed chemical and phase compositions. The acoustic impedance difference (ΔZ) was determined from measured sound velocities in PbTe and CoSb_3 phases. The interface thermal resistance (R_{int}) was calculated using the Debye model and agrees with the experimental R_{int}. It is shown that the κ_{ph} of the composite may be reduced when the particle size of the dispersed phase (CoSb_3) is smaller than the critical value of ~230nm. This relationship was concluded to be crucial for controlling the heat transport phenomena in composite thermoelectric materials. The selection of the components with different elastic properties (acoustic impedance) and particle size smaller than the Kapitza radius leads to a new direction in the engineering of composite TE materials with designed thermal properties
description: 21 pages, 11 figures, 3 tables
Effective Thermal Conductivity of SrBi$_4$Ti$_4$O$_{15}$-La$_{0.7}$Sr$_{0.3}$MnO$_3$ Oxide composite: Role of Particle Size and Interface Thermal Resistance
Creators: name: Kumar, Ashutosh
name: Kosonowski, Artur
name: Wyzga1, Piotr
name: Wojciechowski, Krzysztof T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a novel approach to reduce the thermal conductivity ($κ$) in thermoelectric composite materials using acoustic impedance mismatch and the Debye model. Also, the correlation between interface thermal resistance (R$_{int}$) and the particle size of the dispersed phase on the k of the composite is discussed. In particular, the $κ$ of an oxide composite which consists of a natural superlattice Aurivillius phase (SrBi$_4$Ti$_4$O$_{15}$) as a matrix and perovskite (La$_{0.7}$Sr$_{0.3}$MnO$_3$) as a dispersed phase is investigated. A significant reduction in the $κ$ of composite, even lower than the $κ$ of the matrix when the particle size of La$_{0.7}$Sr$_{0.3}$MnO$_3$ is smaller than the Kapitza radius (a$_K$) is observed, depicting that R$_{int}$ dominates for particle size lower than a$_K$ due to increased surface to volume ratio. The obtained results have the potential to provide new directions for engineering composite thermoelectric systems with desired thermal conductivity and promising in the field of energy harvesting.
description: 21 pages, 8 Figures, 5 Tables
Autonomous flying hydrophones: the design of a multirotor UAV platform for the monitoring of harbour porpoises in Special Areas of Conservation in the United Kingdom
Creators: name: Babatunde, Daniel
Publisher: name: Loughborough University
Year: 2022
Subjects: Mechanical engineering not elsewhere classified

description: This thesis describes the development of a multirotor Uncrewed Aerial Vehicle (UAV) system aimed at assisting with the monitoring of harbour porpoises in Special Areas of Conservation in the United Kingdom. As UAVs become a more popular tool in the observation and study of marine mammals, it is becoming increasingly important to exploit their full capabilities in marine mammal research. The work presented in this thesis focuses on the development of a novel platform and framework for enabling the use of UAVs in the passive acoustic monitoring of harbour porpoises. An autonomous UAV platform designed to enable the recording of harbour porpoise vocalisations is developed and validated. The platform described in this thesis is capable of autonomous navigation, persistent landing, take-off and automatic data acquisition at specified waypoints. The system architecture described also includes methods for control and waypoint planning strategies that enable autonomous UAV flight modes in the system. This solution is also extended to a multiple UAV scenario where a centralised system is used to coordinate missions to enable up to 4 UAVs to autonomously navigate to specified areas and record acoustic data. Data acquisition by means of passive acoustic monitoring is provided by a bespoke underwater acoustic recorder (PorpDAQ), the design of which is also described in detail in this thesis. This device, capable of recording acoustic signals from within the harbour porpoise’s frequency band is highly integrated with the UAV platform and offers a suitable low-cost and relevant solution compared to current off-the-shelf solutions.
Dzyaloshinskii-Moriya-type interaction and Lifshitz invariant in Rashba 2D electron gas systems
Creators: name: Pyatakov, Alexander P.
name: Zvezdin, Anatoly K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The origin of chiral magnetic structures in ultrathin films of magnetic metals is analyzed. It is shown that the Lifshitz-type invariant term in the macroscopic thermodynamic potential can be derived from spin-orbit Rashba Hamiltonian in two dimensional electron gas (2DEG). The former is the prerequisite for existence of spin cycloid, skyrmions and other chiral phenomena observed in thin films. The estimation of the period of spin cycloid gives the value of an order of 10 nm that agrees well with the results of scanning probe microscopy observation reported in the literature.
Robust Independence Tests with Finite Sample Guarantees for Synchronous Stochastic Linear Systems
Creators: name: Tamás, Ambrus
name: Bálint, Dániel Ágoston
name: Csáji, Balázs Csanád
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Dynamical Systems (math.DS)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The paper introduces robust independence tests with non-asymptotically guaranteed significance levels for stochastic linear time-invariant systems, assuming that the observed outputs are synchronous, which means that the systems are driven by jointly i.i.d. noises. Our method provides bounds for the type I error probabilities that are distribution-free, i.e., the innovations can have arbitrary distributions. The algorithm combines confidence region estimates with permutation tests and general dependence measures, such as the Hilbert-Schmidt independence criterion and the distance covariance, to detect any nonlinear dependence between the observed systems. We also prove the consistency of our hypothesis tests under mild assumptions and demonstrate the ideas through the example of autoregressive systems.
Effect of interface resistance on thermoelectric properties in (1-x)La$_{0.95}$Sr$_{0.05}$Co$_{0.95}$Mn$_{0.05}$O$_3$/(x)WC composite
Creators: name: Kumar, Ashutosh
name: Wojciechowski, Krzysztof T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this study, the synergistic effect of the particle size of the dispersed phase and the interface thermal resistance (R$_{int}$) between the phases on the phonon thermal conductivity ($κ_{ph}$) of the (1-x)La$_{0.95}$Sr$_{0.05}$Co$_{0.95}$Mn$_{0.05}$O$_3$/(x)WC thermoelectric composite, is demonstrated. Further, the correlation between the R$_{int}$ and the Kapitza radius is discussed using the Bruggeman's asymmetrical model. In particular, the polycrystalline La$_{0.95}$Sr$_{0.05}$Co$_{0.95}$Mn$_{0.05}$O$_3$ sample is synthesized using a standard-solid state route. The presence of WC nanoparticle is confirmed from the electron microscopy images. Electrical conductivity ($σ$) increases, and the Seebeck coefficient ($α$) decreases with the increase in conducting WC volume fraction in the composite. The simultaneous increase in $σ$ and a decrease in $κ_{ph}$ with the WC volume fraction results in an increased figure of merit (zT) for (1-x)La$_{0.95}$Sr$_{0.05}$Co$_{0.95}$Mn$_{0.05}$O$_3$/(x)WC composite. A maximum zT $\sim$ 0.20 is obtained for (1-x)La$_{0.95}$Sr$_{0.05}$Co$_{0.95}$Mn$_{0.05}$O$_3$/(x)WC composite for x=0.010 at 463 K. The results obtained in the present study shows promise to design thermoelectric composites with desired phonon thermal conductivity considering the elastic properties between the phases.
description: 15 pages, 6 figures, 1 table
Relativistic Strong Scott Conjecture: A Short Proof
Creators: name: Frank, Rupert L.
name: Merz, Konstantin
name: Siedentop, Heinz
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider heavy neutral atoms of atomic number $Z$ modeled with kinetic energy $(c^2p^2+c^4)^{1/2}-c^2$ used already by Chandrasekhar. We study the behavior of the one-particle ground state density on the length scale $Z^{-1}$ in the limit $Z,c\to\infty$ keeping $Z/c$ fixed. We give a short proof of a recent result by the authors and Barry Simon showing the convergence of the density to the relativistic hydrogenic density on this scale.
Moonshot lessons for open science: sustaining a collaboration platform for real-time data and idea sharing in targeting SARS-CoV-2 Main Protease
Creators: name: von Delft, Frank
Publisher: name: Zenodo
Year: 2022
Subjects: AViDD
Antiviral Drug Discovery
Antiviral Drug Discovery Open Science Forum
AViDD Open Science Forum
Open Science Forum
open science
AI-driven Structure-enabled Antiviral Platform (ASAP) AViDD Center
COVID Moonshot

description: This is Frank Von Delft's presentation at the monthly [virtual] Antiviral Drug Discovery (AViDD) Open Science Forum on 19 October 2022. His talk centers around How Data Infrastructure Should Accelerate Open Science. Public datasets SARS-CoV-2 X-ray fragment screens at Diamond Light Source Fragalysis online X-ray fragment screen viewer for public datasets You can find a recording of his talk on the AViDD Open Science Forum Youtube page Frank Von Delft is a part of the AI-driven Structure-enabled Antiviral Platform (ASAP) AViDD Center and is a Project 2: Target enablement lead as well as a Structural Biology Core lead.
Closed String Thermodynamics and a Blue Tensor Spectrum
Creators: name: Brandenberger, Robert H.
name: Nayeri, Ali
name: Patil, Subodh P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The BICEP-2 team has reported the detection of primordial cosmic microwave background B-mode polarization, with hints of a suppression of power at large angular scales relative to smaller scales. Provided that the B-mode polarization is due to primordial gravitational waves, this might imply a blue tilt of the primordial gravitational wave spectrum. Such a tilt would be incompatible with standard inflationary models, although it was predicted some years ago in the context of a mechanism that thermally generates the primordial perturbations through a Hagedorn phase of string cosmology. The purpose of this note is to encourage greater scrutiny of the data with priors informed by a model that is immediately falsifiable, but which \textit{predicts} features that might be favoured by the data-- namely a blue tensor tilt with an induced and complimentary red tilt to the scalar spectrum, with a naturally large tensor to scalar ratio that relates to both.
description: 6 pages, 3 figures, references added
title: Phytophthora na Chamaecyparis lawsoniana Murr. (cypřišek lawsonův)
Creators: name: Robin, Cécile
Publisher: name: Julius Kühn-Institut , Federal Research Centre for Cultivated Plants
Year: 2013

description: JKI Data Sheets Plant Pests and Diagnosis; 2013/21
description: Kromě nemnoha lesnických výsadeb je C.lawsoniana v Evropě pěstován především jako okrasná rostlina v parcích a jako větrolam v remízcích (http://www.discoverlife.org). Cypřišek lawsonův je jeden z nejdůležitějších jehličnanů v Evropském školkařském obchodu. Celková suma dovezených okrasných rostlin dovezených ze Severní Ameriky do EU činila 75 (1999), 130 (2002) a 50 (2001 a 2003) tun (Global ornamental trade data, AIPH, International Statistics on Flowers and Plants).
Sociocultural Impact of Reservoirs on Local Government Institutions
Creators: name: Drucker, Philip
name: Clark, Jerry Eugene
name: Smith, Lesker Dianne
Publisher: name: Kentucky Water Resources Research Institute, University of Kentucky
Year: 1973

description: Abstract:
This study of the probable sociocultural impact of a proposed reservoir in central Kentucky on the institutions of local governments of a community adjacent to the reservoir utilizes anthropological concepts of social values and cultural and social change as well as anthropological research techniques. Data on observed impact on the same institutions in communities adjacent to two recently completed Kentucky reservoirs permit inferences as to probable directions and extent of reservoir-related change. Specific aspects of impact considered include: effects of reduction of the county tax base due to Federal acquisition of lands, including necessity for increased severity of taxes and changes in assessments, problems related to effective planning and zoning, potential benefits from development or expansion of city and county potable water supply, effects of reservoir caused highway relocation on county roads and county road maintenance, and effects of reservoir-created tourism patterns on local law enforcement. The overall purpose of the study is to recommend to the agency (Corps of Engineers) that is causing massive environmental change through creation of a manmade lake, improvements in policies and procedures that will increase sociocultural benefits and decrease sociocultural costs.
Funding information: The work on which this report is based was supported in part by funds provided by the Office of Water Resources Research, United States Department of the Interior, as authorized under the Water Resources Research Act of 1964.
Initial data rigidity results
Creators: name: Eichmair, Michael
name: Galloway, Gregory J.
name: Mendes, Abraão
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We present several rigidity results for initial data sets motivated by the positive mass theorem. An important step in our proofs here is to establish conditions that ensure that a marginally outer trapped surface is "weakly outermost". A rigidity result for Riemannian manifolds with a lower bound on their scalar curvature is included as a special case.
description: 22 pages. Final version. Published in Commun. Math. Phys., vol. 386 (2021). All comments welcome
The RCT 1.3-meter Robotic Telescope: Broad-band Color Transformation and Extinction Calibration
Creators: name: Strolger, Louis-Gregory
name: Gott, Andrew M.
name: Carini, Michael
name: Engle, Scott
name: Gelderman, Richard
name: Guinan, Edward
name: Laney, C. David
name: McGruder, Charles
name: Treffers, Richard R.
name: Walter, Donald K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The RCT 1.3-meter telescope, formerly known as the Kitt Peak National Observatory (KPNO) 50-inch telescope, has been refurbished as a fully robotic telescope, using an autonomous scheduler to take full advantage of the observing site without the requirement of a human presence. Here we detail the current configuration of the RCT, and present as a demonstration of its high-priority science goals, the broadband {\it UBVRI} photometric calibration of the optical facility. In summary, we find the linear color transformation and extinction corrections to be consistent with similar optical KPNO facilities, to within a photometric precision of 10% (at $1σ$). While there were identified instrumental errors likely adding to the overall uncertainty, associated with since-resolved issues in engineering and maintenance of the robotic facility, a preliminary verification of this calibration gave good indication that the solution is robust, perhaps to a higher precision than this initial calibration implies. The RCT has been executing regular science operations since 2009, and is largely meeting the science requirements set in its acquisition and re-design.
description: 14 pages, 10 figures. Accepted by the Astronomical Journal
Are Helicases a Druggable Protein Family?
Creators: name: Willson, Timothy M
Publisher: name: Zenodo
Year: 2022
Subjects: Rapidly Emerging Antiviral Drug Development Initiative (READDI)
READDI
Rapidly Emerging Antiviral Drug Development Initiative
AViDD
Antiviral Drug Discovery
Antiviral Drug Discovery Open Science Forum
AViDD Open Science Forum
Open Science Forum
open science

description: This is Tim Willson's presentation at the monthly [virtual] Antiviral Drug Discovery (AViDD) Open Science Forum on 16 November 2022. His talk centers around the druggability of SARS-CoV-2 nsp13. HeliHub helicase database: Use SGC ChemBioPort Query ID: i9hao20220815 You can find a recording of his talk on the AViDD Open Science Forum Youtube page Tim Willson is a part of the Rapidly Emerging Antiviral Drug Development Initiative (READDI)
DataTools4Heart_Milestone2_Clear policy and guidance on pseudonymised and synthetic data processing in the clinical sector.
Creators: name: Lorenzo, Lorenzo
Publisher: name: Zenodo
Year: 2023

description: Notwithstanding the pivotal importance of the distinction between personal and non-personal data according to the applicable laws, it is extremely burdensome, in most of the cases, to differentiate between these categories. This is because there is no precise indication in the legislation, or by competent regulators, as to what is the correct legal test to apply to correctly categorise data as anonymous or not. Practically, the EU regulatory scenario has so far been affected by a very rigid interpretation of data anonymisation, deriving from an important opinion adopted by the Article 29 Working Party in 2014. Moreover, the different stances taken by national Supervisory Authority have made reliance on anonymisation techniques even more complex to achieve and riskier, since the degree of irreversibility that individual de-identification must achieve so that data can be deemed anonymous varies from a member State to another. In parallel, the requirements to be abided in connection with the processing and even more the reuse of health data for scientific research are not homogeneous at European level, in that every member State is empowered to adopt its own limitations or conditions which apply in addition to or in lieu of the General Data Protection Legislation. DataTools4Heart aims to set, among others, new regulatory standards for ensuring that all types of health data, both in structured and unstructured format, can securely and lawfully undergo a secondary processing for the purpose of medical research in the cardiology sector. For this reason, this report starts with a detailed analysis of the current state-of-the-art regarding pseudonymisation, for then going in-depth into the benefits that can stem from some specific Privacy-Enhancing Technologies, focusing on Federated Learning, Differential Privacy, Secure Multi-Party Computation and, particularly, on Synthetic Data, with a view to overcoming the hurdles that to date prevent the implementation of the European Health Data Space and the progress of the EU Research area. The analysis goes focusing on the legal nature of synthetic data in the light of the Artificial Intelligence Act, and evaluating in detail the promising interpretative evolutions of what constitutes pseudonymous and anonymous data based on the crucial decision issued by the EU General Court in April 2023 in relation to the Case T-557/20. Finally, conclusions are drawn regarding the robustness and the reliability of the innovative solutions put forward in the project, to enhance the protection of personal data and patients’ privacy, while achieving strong accountability and enabling a concrete progress of medical research thanks to compliant reuse of health data.
Geometric aspects of covariant Wick rotation
Creators: name: Singh, Raghvendra
name: Kothawala, Dawood
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss the generic geometric properties of metrics $\widehat {g}_{ab}$ constructed from Lorentzian metric $g_{ab}$ and a nowhere vanishing, hypersurface orthogonal, timelike vector field $u^a$. The metric ${\widehat g}_{ab}$ has Euclidean signature in a certain domain, with the transition to Lorentzian signature occurring at some hypersurface $Σ$ orthogonal to $u^a$. Geometry associated with ${\widehat g}_{ab}$ has recently been shown to yield remarkable new insights for classical and quantum gravity. In this work, we prove several general results applicable in physically relevant spacetimes for congruences $u^i$ with non-zero acceleration $a^i$. We present as examples the cases of dynamical spherically symmetric spacetimes and spacetimes with maximal symmetry. We also investigate this formalism within the context of thermal effects in curved spacetimes with horizons. Specifically, we discuss: (i) the Holonomy of loops lying partially or wholly in the Euclidean regime. We show that the contribution of the Euclidean domain to holonomy is completely determined by extrinsic curvature $K_{ab}$ of $Σ$ and acceleration $a^i$. (ii) We also compute entropy using this formalism for simple field theories and obtain foliation dependent corrections for the Lanczos-Lovelock gravity, Bekenstein-Hawking entropy relation in four spacetime dimensions.
description: 22 pages, 1 figure
Unveiling process insights from refactoring practices
Creators: name: Caldeira, João
name: Abreu, Fernando Brito e
name: Cardoso, Jorge
name: Reis, José
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Context : Software comprehension and maintenance activities, such as refactoring, are said to be negatively impacted by software complexity. The methods used to measure software product and processes complexity have been thoroughly debated in the literature. However, the discernment about the possible links between these two dimensions, particularly on the benefits of using the process perspective, has a long journey ahead. Objective: To improve the understanding of the liaison of developers' activities and software complexity within a refactoring task, namely by evaluating if process metrics gathered from the IDE, using process mining methods and tools, are suitable to accurately classify different refactoring practices and the resulting software complexity. Method: We mined source code metrics from a software product after a quality improvement task was given in parallel to (117) software developers, organized in (71) teams. Simultaneously, we collected events from their IDE work sessions (320) and used process mining to model their processes and extract the correspondent metrics. Results: Most teams using a plugin for refactoring (JDeodorant) reduced software complexity more effectively and with simpler processes than the ones that performed refactoring using only Eclipse native features. We were able to find moderate correlations (43%) between software cyclomatic complexity and process cyclomatic complexity. The best models found for the refactoring method and cyclomatic complexity level predictions, had an accuracy of 92.95% and 94.36%, respectively. Conclusions: Our approach agnostic to programming languages, geographic location, or development practices. Initial findings are encouraging, and lead us to suggest practitioners may use our method in other development tasks, such as, defect analysis and unit or integration tests.
Rough Homogenisation with Fractional Dynamics
Creators: name: Gehringer, Johann
name: Li, Xue-Mei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We review recent developments of slow/fast stochastic differential equations, and also present a new result on Diffusion Homogenisation Theory with fractional and non-strong-mixing noise and providing new examples. The emphasise of the review will be on the recently developed effective dynamic theory for two scale random systems with fractional noise: Stochastic Averaging and `Rough Diffusion Homogenisation Theory'. We also study the geometric models with perturbations to symmetries.
Parallel architectures for fuzzy triadic similarity learning
Creators: name: Alouane-Ksouri, Sonia
name: Sassi-Hidri, Minyar
name: Barkaoui, Kamel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: In a context of document co-clustering, we define a new similarity measure which iteratively computes similarity while combining fuzzy sets in a three-partite graph. The fuzzy triadic similarity (FT-Sim) model can deal with uncertainty offers by the fuzzy sets. Moreover, with the development of the Web and the high availability of storage spaces, more and more documents become accessible. Documents can be provided from multiple sites and make similarity computation an expensive processing. This problem motivated us to use parallel computing. In this paper, we introduce parallel architectures which are able to treat large and multi-source data sets by a sequential, a merging or a splitting-based process. Then, we proceed to a local and a central (or global) computing using the basic FT-Sim measure. The idea behind these architectures is to reduce both time and space complexities thanks to parallel computation.
Investigating the impact of supervisory stress tests on bank performance: bank lending, credit risk, and diversification
Creators: name: Ahmed, Kasim
Publisher: name: Loughborough University
Year: 2022
Subjects: Business systems in context not elsewhere classified

description: The thesis investigates the impact of supervisory stress tests on bank performance using three bank performance measures. The Global Financial Crisis exposed vulnerabilities within the banking system that resulted in insolvency issues for several financial institutions. In particular, there was a need for government intervention to support struggling banks during the crisis. Due to the crisis, new banking regulations via the Basel III accords have attempted to address vulnerabilities, improve regulations to foster market discipline, and strengthen the financial system. This thesis investigates one section of the Basel III accords that overhauled the stress testing regime.
title: The Temperature Trend in the Upper Mesosphere Between ∼84 Km And 98 Km Based on Diurnal Cycle Observations by a Na Lidar at Middle Latitudes Between 2002 And 2017
Creators: name: Pena, Melania Carolina
Publisher: name: Utah State University
Year: 2024

description: Carbon dioxide is one of the main greenhouse gasses that contributes to maintaining Earth’s warm global temperature in its atmosphere. Recent studies have indicated that this cooling trend has been determined to vary between less than 1 K/decade or 2 K/decade. However, these results have been determined using data that have been obtained using nighttime lidar observations and potentially do not give the complete picture on how the cooling trend is behaving. The main goal of this research is to understand the behavior of the linear temperature trend between the daytime and nighttime profiles using a 16-year dataset (2002-2017), when the sodium (Na) doppler lidar at Colorado State University, later located to Utah State University (2010), was conducting routine full diurnal cycle observations. A customized multi-linear regression (MLR) algorithm can be utilized to determine the linear temperature trends for either nighttime or daytime data sets. One main concern when utilizing the MLR for both types of lidar temperature profiles is the uncertainties in daytime profiles are shown to be higher compared to nighttime profiles. To counter this, two mathematical averaging methods were applied to the daytime and nighttime profiles to achieve a daily mean with its uncertainty. The first method uses an equal weighting average, and the second method is an inverse variance weighting (IVW) method. Applying both methods to calculate the daily mean temperatures, which are adopted into the MLR model fit, provided results for the optimized parameters and their fitting uncertainties.
Anomalous character of the axion-photon coupling in a magnetic field distorted by a pp-wave gravitational background
Creators: name: Balakin, Alexander B.
name: Ni, Wei-Tou
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the problem of axion-photon coupling in the magnetic field influenced by gravitational radiation. We focus on exact solutions to the equations for axion electrodynamics in the pp-wave gravitational background for two models with initially constant magnetic field. The first model describes the response of an initially constant magnetic field in a gravitational-wave vacuum with unit refraction index; the second model is characterized by a non-unit refraction index prescribed to the presence of ordinary and/or dark matter. We show that both models demonstrate anomalous behavior of the electromagnetic field generated by the axion-photon coupling in the presence of magnetic field, evolving in the gravitational wave background. The role of axionic dark matter in the formation of the anomalous response of this electrodynamic system is discussed.
description: 26 pages, no figures
Supplementary document for Adaptive ray tracing for freeform GRIN using index directional derivative - 7166219.pdf
Creators: name: Yu, Cai
name: yi, zong
name: Duan, Mingliang
name: Chen, Lei
name: Li, Jianxin
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: Supplemental material
Finite dimensional Nichols algebras over Suzuki algebra I: simple Yetter-Drinfeld modules of $A_{N\,2n}^{μλ}$
Creators: name: Shi, Yuxing
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 16T05, 16T25, 17B22

description: The Suzuki algebra $A_{Nn}^{μλ}$ was introduced by Suzuki Satoshi in 1998, which is a class of cosemisimple Hopf algebras. It is not categorically Morita-equivalent to a group algebra in general. In this paper, the author gives a complete set of simple Yetter-Drinfeld modules over the Suzuki algebra $A_{N\,2n}^{μλ}$ and investigates the Nichols algebras over those simple Yetter-Drinfeld modules. The involved finite dimensional Nichols algebras of diagonal type are of Cartan type $A_1$, $A_1\times A_1$, $A_2$, $A_2\times A_2$, Super type ${\bf A}_{2}(q;I_2)$ and the Nichols algebra ufo(8). There are $64$, $4m$ and $m^2$-dimensional Nichols algebras of non-diagonal type over $A_{N\,2n}^{μλ}$. The $64$-dimensional Nichols algebras are of dihedral rack type $\Bbb{D}_4$. The $4m$ and $m^2$-dimensional Nichols algebras $\mathfrak{B}(V_{abe})$ discovered first by Andruskiewitsch and Giraldi can be realized in the category of Yetter-Drinfeld modules over $A_{Nn}^{μλ}$. By using a result of Masuoka, we prove that $\dim\mathfrak{B}(V_{abe})=\infty$ under the condition $b^2=(ae)^{-1}$, $b\in\Bbb{G}_{m}$ for $m\geq 5$.
description: 28 Pages, Comments are welcome