cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Narrow-line magneto-optical cooling and trapping of strongly magnetic atoms
Creators: name: Berglund, Andrew J.
name: Hanssen, James L.
name: McClelland, Jabez J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Laser cooling on weak transitions is a useful technique for reaching ultracold temperatures in atoms with multiple valence electrons. However, for strongly magnetic atoms a conventional narrow-line magneto-optical trap (MOT) is destabilized by competition between optical and magnetic forces. We overcome this difficulty in Er by developing an unusual narrow-line MOT that balances optical and magnetic forces using laser light tuned to the blue side of a narrow (8 kHz) transition. The trap population is spin-polarized with temperatures reaching below 2 microkelvin. Our results constitute an alternative method for laser cooling on weak transitions, applicable to rare-earth-metal and metastable alkaline earth elements.
description: To appear in Phys. Rev. Lett. 4 pages, 5 figures
C-loops: An introduction
Creators: name: Phillips, J. D.
name: Vojtěchovský, Petr
Publisher: name: arXiv
Year: 2007
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20N05

description: C-loops are loops satisfying $x(y(yz))=((xy)y)z$. They often behave analogously to Moufang loops and they are closely related to Steiner triple systems and combinatorics. We initiate the study of C-loops by proving: (i) Steiner loops are C-loops, (ii) C-loops are alternative, inverse property loops with squares in the nucleus, (iii) the nucleus of a C-loop is a normal subgroup, (iv) C-loops modulo their nucleus are Steiner loops, (v) C-loops are power associative, power alternative but not necessarily diassociative, (vi) torsion commutative C-loops are products of torsion abelian groups and torsion commutative 2-C-loops; and several other results. We also give examples of the smallest nonassociative C-loops, and explore the analogy between commutative C-loops and commutative Moufang loops.
description: 15 pages
Additional file 1 of Disseminated cryptococcosis in a patient with idiopathic CD4 + T lymphocytopenia presenting as prostate and adrenal nodules: diagnosis from pathology and mNGS, a case report
Creators: name: Baomo, Liu
name: Guofen, Zeng
name: Jie, Dong
name: Liu, Xie
name: Shuru, Chen
name: Jing, Liu
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: Supplementary Material 1
Driving energetically-unfavorable dehydrogenation dynamics with plasmonics
Creators: name: Sytwu, Katherine
name: Vadai, Michal
name: Hayee, Fariah
name: Angell, Daniel K.
name: Dai, Alan
name: Dixon, Jefferson
name: Dionne, Jennifer
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Nanoparticle surface structure and geometry generally dictate where chemical transformations occur, with the low-coordination-number, high-radius-of-curvature sites being energetically-preferred. Here, we show how optical excitation of plasmons enables spatially-controlled chemical transformations, including access to sites which, without illumination, would be energetically-unfavorable. We design a crossed-bar Au-PdHx antenna-reactor system that localizes electromagnetic enhancement away from the innately reactive PdHx nanorod tips. Using optically-coupled in situ environmental transmission electron microscopy, we track the dehydrogenation of individual antenna-reactor pairs with varying optical illumination intensity, wavelength, and hydrogen pressure. Our in situ experiments show that plasmons enable new catalytic sites, including hydrogenation dissociation at the nanorod faces. Molecular dynamics simulations confirm that these new nucleation sites are energetically unfavorable in equilibrium and only accessible via tailored plasmonic excitation.
description: 13 pages, 5 figures
Complexity-based speciation and genotype representation for neuroevolution
Creators: name: Hadjiivanov, Alexander
name: Blair, Alan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This paper introduces a speciation principle for neuroevolution where evolving networks are grouped into species based on the number of hidden neurons, which is indicative of the complexity of the search space. This speciation principle is indivisibly coupled with a novel genotype representation which is characterised by zero genome redundancy, high resilience to bloat, explicit marking of recurrent connections, as well as an efficient and reproducible stack-based evaluation procedure for networks with arbitrary topology. Furthermore, the proposed speciation principle is employed in several techniques designed to promote and preserve diversity within species and in the ecosystem as a whole. The competitive performance of the proposed framework, named Cortex, is demonstrated through experiments. A highly customisable software platform which implements the concepts proposed in this study is also introduced in the hope that it will serve as a useful and reliable tool for experimentation in the field of neuroevolution.
Invariants for a Class of Nongeneric Three-qubit States
Creators: name: Sun, Bao-Zhi
name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the equivalence of quantum states under local unitary transformations. A complete set of invariants under local unitary transformations is presented for a class of non-generic three-qubit mixed states. It is shown that two such states in this class are locally equivalent if and only if all these invariants have equal values for them.
description: 7 pages
Joint Suzaku and Chandra observations of the MKW4 galaxy group out to the virial radius
Creators: name: Sarkar, Arnab
name: Su, Yuanyuan
name: Randall, Scott
name: Gastaldello, Fabio
name: Trierweiler, Isabella
name: White, Raymond
name: Kraft, Ralph
name: Miller, Eric
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present joint Suzaku and Chandra observations of MKW4. With a global temperature of 1.6 keV, MKW4 is one of the smallest galaxy groups that have been mapped in X-rays out to the virial radius. We measure its gas properties from its center to the virial radius in the north, east, and northeast directions. Its entropy profile follows a power-law of $\propto r^{1.1}$ between R$_{500}$ and R$_{200}$ in all directions, as expected from the purely gravitational structure formation model. The well-behaved entropy profiles at the outskirts of MKW4 disfavor the presence of gas clumping or thermal non-equilibrium between ions and electrons in this system. We measure an enclosed baryon fraction of 11% at R$_{200}$, remarkably smaller than the cosmic baryon fraction of 15%. We note that the enclosed gas fractions at R$_{200}$ are systematically smaller for groups than for clusters from existing studies in the literature. The low baryon fraction of galaxy groups, such as MKW4, suggests that their shallower gravitational potential well may make them more vulnerable to baryon losses due to AGN feedback or galactic winds. We find that the azimuthal scatter of various gas properties at the outskirts of MKW4 is significantly lower than in other systems, suggesting that MKW4 is a spherically symmetric and highly relaxed system.
description: 15 pages, 14 figures, Accepted for publication in MNRAS
Positive/Negative Approximate Multipliers for DNN Accelerators
Creators: name: Spantidi, Ourania
name: Zervakis, Georgios
name: Anagnostopoulos, Iraklis
name: Amrouch, Hussam
name: Henkel, Jörg
Publisher: name: arXiv
Year: 2021
Subjects: subject: Hardware Architecture (cs.AR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recent Deep Neural Networks (DNNs) managed to deliver superhuman accuracy levels on many AI tasks. Several applications rely more and more on DNNs to deliver sophisticated services and DNN accelerators are becoming integral components of modern systems-on-chips. DNNs perform millions of arithmetic operations per inference and DNN accelerators integrate thousands of multiply-accumulate units leading to increased energy requirements. Approximate computing principles are employed to significantly lower the energy consumption of DNN accelerators at the cost of some accuracy loss. Nevertheless, recent research demonstrated that complex DNNs are increasingly sensitive to approximation. Hence, the obtained energy savings are often limited when targeting tight accuracy constraints. In this work, we present a dynamically configurable approximate multiplier that supports three operation modes, i.e., exact, positive error, and negative error. In addition, we propose a filter-oriented approximation method to map the weights to the appropriate modes of the approximate multiplier. Our mapping algorithm balances the positive with the negative errors due to the approximate multiplications, aiming at maximizing the energy reduction while minimizing the overall convolution error. We evaluate our approach on multiple DNNs and datasets against state-of-the-art approaches, where our method achieves 18.33% energy gains on average across 7 NNs on 4 different datasets for a maximum accuracy drop of only 1%.
description: Accepted for publication at the 40th International Conference On Computer Aided Design (ICCAD 2021)
Design and optimization of a Tesla pump for ORC applications
Creators: name: Anselmi, Eduardo Palma
name: Fiaschi, Daniele
name: Manfrida, Giampaolo
name: Nicotra, Giovanni
name: Talluri, Lorenzo
Publisher: name: Technical University of Munich
Year: 2021

description: The Tesla pump is bladeless turbomachinery known for being more resistant to work with hard-to-pump fluids than conventional turbomachinery, thanks to its simple, robust mechanical design and its working principle (viscous forces). A 2D numerical model is developed and a design procedure of a Tesla pump working with several working fluids (water, R1233zd(E), R1234yf) is proposed. A complete design methodology is developed by evaluating the losses of each component and by introducing a rotor model. The main optimizing parameters of the pump are highlighted and assessed and validation of the model with available experimental results is carried out. A design procedure for a Tesla pump prototype is showed and its characteristic curves are obtained and discussed. The results achieved are similar to other experimental Tesla pumps, with a maximum achieved efficiency of 26.8%. The extension of the model to organic working fluids allowed to predict pump efficiencies higher than 50% for low mass flow rate conditions for both assessed fluids.
Color for the perceptual organization of the pictorial plane: Victor Vasarely's legacy to Gestalt Psychology
Creators: name: Dresp-Langley, Birgitta
name: Reeves, Adam
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: Victor Vasarely (1906-1997)and his important legacy to the study of human perception are brought to the forefront and discussed. A large part of his impressive work conveys the appearance of striking three-dimensional shapes and structures in a large-scale pictorial plane. Current perception science explains such effects by invoking brain mechanisms for the processing of monocular (2D) depth cues. Here in this study, we illustrate and explain local effects of 2D color and contrast cues on the perceptual organization in terms of figure-ground assignments, i.e. which local surfaces are likely to be seen as nearer or bigger in the image plane. Paired configurations are embedded in a larger, structurally ambivalent pictorial context inspired by some of Vasarelys creations. The figure-ground effects the configurations produce reveal a significant correlation between perceptual solutions for nearer and bigger when other monocular depth cues are not provided. In consistency with previous findings on similar, albeit simpler visual displays, a specific color may compete with luminance contrast to resolve the planar ambiguity of a complex pattern context at a critical point in the hierarchical resolution of figure-ground uncertainty. The potential role of color temperature in this process is brought forward here. Vasarely intuitively understood and successfully exploited the subtle context effects accounted for in this paper, well before empirical investigation had set out to study and explain them in terms of information processing by the visual brain.
Bernat Bardagil Collection of Panará Language Materials
Creators: name: Panära, Akââ
name: Panära, Krenpy
name: Panära, Pâtti
name: Panära, Sokrejï
name: Bardagil Mas, Bernat
name: Panära, Jotikjä
name: Panära, Kapê
name: Panära, Kutinkre
name: Panära, Kôka
name: Panära, Paatomä
name: Panära, Sinëjn
name: Panära, Tepakriti
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024

description: Gravações de áudio e vídeo de textos (histórias, músicas), fotografias.

-----

Audio and video recordings of texts (e.g., stories, songs), photographs.
Post deposition treatment of thermal sprayed coatings
Creators: name: John, George
Publisher: name: University of British Columbia
Year: 2009

description: Thermal sprayed coatings are frequently used in corrosive environments, even when their major purpose is to provide wear or thermal resistance, rather than corrosion resistance. This includes Thermal Barrier Coatings (TBC), where high porosity is a desired feature to give good thermal protection. Porosity also provides increased strain tolerance of the coating. However, as this proves to be a limiting factor in the corrosion protection, a trade off is involved. This is because the interconnected porosity in TBCs allows the corrosive media to reach the coating-substrate interface, which eventually leads to delamination of the coatings. The current techniques to reduce coating permeability include polymer impregnation and laser glazing. Polymer impregnation into the pores is difficult and it severely limits the high temperature properties of the parent coating. Laser glazing produces segmented cracks in the coating which are useful in providing strain tolerance, but accelerate the rate of bond coat oxidation. This work addresses the problem of permeability of TBCs which is responsible for the poor corrosion protection offered by these coatings. The coatings studied included yttriastabilized zirconia and alumina TBCs. A simple infiltration technique has been proposed using sol-gel ceramic precursors. The precursors included metal alkoxides which decompose at relatively low temperatures to their respective oxides. It has been proven that these precursors effectively penetrate into the pores and are beneficial in drastically reducing the coating permeability to gases. Electrochemical tests were carried out in 3.0 wt.% NaCl solution to study the effectiveness of the sealant in reducing the coating permeability. These potentiodynamic tests as well as gas permeability tests show a considerable decrease in interconnected porosity with sol-gel modification of the coatings. Burner rig tests show an increase in sealed coating life time under thermo-mechanical fatigue conditions. The peel adhesion tests confirm an increase in the adhesion values with such a post deposition treatment. It is concluded that the advantages of sol-gel route to ceramics have been successfully utilized to post-treat porous thermal sprayed coatings in an attempt to reduce their permeability and to increase the life expectancy under corrosive and/or thermo-mechanical fatigue conditions.
Additional file 1 of Burnout among public health workers in Canada: a cross-sectional study
Creators: name: Singh, Japteg
name: Poon, David E-O
name: Alvarez, Elizabeth
name: Anderson, Laura
name: Verschoor, Chris P.
name: Sutton, Arielle
name: Zendo, Zayya
name: Piggott, Thomas
name: Apatu, Emma
name: Churipuy, Donna
name: Culbert, Ian
name: Hopkins, Jessica P.
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Supplementary Material 1
Data-Level Recombination and Lightweight Fusion Scheme for RGB-D Salient Object Detection
Creators: name: Wang, Xuehao
name: Li, Shuai
name: Chen, Chenglizhao
name: Fang, Yuming
name: Hao, Aimin
name: Qin, Hong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Existing RGB-D salient object detection methods treat depth information as an independent component to complement its RGB part, and widely follow the bi-stream parallel network architecture. To selectively fuse the CNNs features extracted from both RGB and depth as a final result, the state-of-the-art (SOTA) bi-stream networks usually consist of two independent subbranches; i.e., one subbranch is used for RGB saliency and the other aims for depth saliency. However, its depth saliency is persistently inferior to the RGB saliency because the RGB component is intrinsically more informative than the depth component. The bi-stream architecture easily biases its subsequent fusion procedure to the RGB subbranch, leading to a performance bottleneck. In this paper, we propose a novel data-level recombination strategy to fuse RGB with D (depth) before deep feature extraction, where we cyclically convert the original 4-dimensional RGB-D into \textbf{D}GB, R\textbf{D}B and RG\textbf{D}. Then, a newly lightweight designed triple-stream network is applied over these novel formulated data to achieve an optimal channel-wise complementary fusion status between the RGB and D, achieving a new SOTA performance.
An expert system for metal matrix composite selection and design
Creators: name: Legzdins, Colleen
Publisher: name: University of British Columbia
Year: 2009

description: This thesis summarizes the development and components of an expert system which supports engineers in the selection and design of metal matrix composites(MMCs). The system consists of a dynamic hypertext interface integrated into an expert system developed within the COMDALE/X environment. Mechanical and thermophysical material property data for matrix alloys, reinforcement materials, and MMCs is stored in databases accessed by the expert system. Mathematical models which utilize constituent material properties to determine effective composite properties are managed by the system to design metal matrix composites and fill in property gaps. Effective elastic modulus, thermal conductivity, coefficient of thermal expansion, Poisson's ratio, shear and bulk moduli mathematical models for particulate, whisker, short fiber and fiber composites are contained in a spreadsheet managed by the system. Although the physical and mechanical properties may often limit the constituent selection, it is the chemical reactivity of the ceramic reinforcement with the matrix alloy either during service or fabrication which will generally control the final matrix/reinforcement combination. As a result, constituent material compatibility has been determined and incorporated in the system. A database of appropriate reinforcement coatings for applicable matrix/reinforcement systems is also included. MMC material properties are directly influenced by manufacturing techniques. Although a variety of fabrication methods exist, they are limiting factors which control the availability of a suitable method for any given material design. As a result, a decision analysis technique has been developed to predict suitable manufacturing methods. The system hypertext document is an on-line reference setup to allow easy access to materials information. Materials selection, effective composite property information, mathematical modeling, constituent compatibility, and manufacturing methods are among the topics covered. Relative manufacturing costs have been determined and these have been summarized in the hypertext document. A cost database of reinforcement and MMC materials has also been compiled. Three consultation sessions have been included to demonstrate the capabilities of the expert system. Finally, system validation and evaluation are discussed.
Searching for absorbed AGN in the 2XMM-Newton pre-release EPIC Serendipitous Source Catalogue
Creators: name: Memola, Elisabetta
name: Caccianiga, Alessandro
name: Cocchia, Filomena
name: Della Ceca, Roberto
name: Maccacaro, Tommaso
name: Severgnini, Paola
name: Fyfe, Duncan J.
name: Mateos, Silvia
name: Watson, Mike G.
name: Lamer, Georg
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We aim to test a method of efficiently selecting X-ray obscured AGN in the 2XMM-Newton EPIC Serendipitous Source Catalogue. By means of a strong correlation established using the XMM-Newton Hard Bright Sample between the intrinsic absorption and the hardness ratio to the 0.5-2.0 keV and 2.0-4.5 keV bands, an efficient way of selecting absorbed sources has been worked out. A hardness ratio selection based on the 2XMM-Newton pre-release Source Catalogue led us to the definition of candidates likely to be obscured in X-rays. X-ray and optical spectral analysis were performed for three objects. Strong absorption (NH > 10^{22} cm^{-2}) was detected from the X-ray analysis, confirming the efficiency of the method used to select obscured sources. The presence of absorption is also revealed in the optical band, although at a significantly lower level than inferred from the X-ray band.
description: 6 pages, 9 PostScript figures, 2 tables, LaTeX - Accepted for publication in Astronomy & Astrophysics, elisabetta.memola@brera.inaf.it. The original version of the manuscript is available at http://www.brera.inaf.it/utenti/memola/publications.html
Low-spin particle/hole-core excitations in $^{41,47,49}$Ca isotopes studied by cold-neutron capture reactions
Creators: name: Bottoni, S.
name: Cieplicka-Oryńczak, N.
name: Leoni, S.
name: Fornal, B.
name: Colò, G.
name: Bortignon, P. F.
name: Bocchi, G.
name: Bazzacco, D.
name: Benzoni, G.
name: Blanc, A.
name: Bracco, A.
name: Ceruti, S.
name: Crespi, F. C. L.
name: de France, G.
name: Gamba, E. R.
name: Iskra, Ł. W.
name: Jentschel, M.
name: Köster, U.
name: Michelagnoli, C.
name: Million, B.
name: Mengoni, D.
name: Mutti, P.
name: Niu, Y.
name: Porzio, C.
name: Simpson, G.
name: Soldner, T.
name: Szpak, B.
name: Türler, A.
name: Ur, C. A.
name: Urban, W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present recent results on the structure of the one-valence-particle $^{41}$Ca and $^{49}$Ca, and one-valence-hole $^{47}$Ca, nuclei. The isotopes of interest were populated via the cold-neutron capture reactions $^{40}$Ca(n,$γ$), $^{48}$Ca(n,$γ$) and $^{46}$Ca(n,$γ$), respectively. The experiments were performed at the Institut Laue-Langevin, within the EXILL campaign, which employed a large array of HPGe detectors. The $γ$ decay and level schemes of these nuclei were investigated by $γ$-ray coincidence relationships, leading to the identification of 41, 10, and 6 new transitions in $^{41}$Ca, $^{47}$Ca, and $^{49}$Ca, respectively. Branching ratios and intensities were extracted for the $γ$ decay from each state, and $γ$-ray angular correlations were performed to establish a number of transition multipolarities and mixing ratios, thus helping in the spin assignment of the states. The experimental findings are discussed along with microscopic, self-consistent beyond-mean-field calculations performed with the Hybrid Configuration Mixing model, based on a Skyrme SkX Hamiltonian. The latter suggests that a fraction of the low-spin states of the $^{41}$Ca, $^{49}$Ca, and $^{47}$Ca nuclei is characterized by the coexistence of either 2p-1h and 1p-2h excitations, or couplings between single-particle/hole degrees of freedom and collective vibrations (phonons) of the doubly-magic "core".
The Full Automorphism Group of a Cyclic $p$-gonal Surface
Creators: name: Wootton, Aaron
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 14J50

description: If $p$ is prime, a compact Riemann surface $X$ of genus $g\geq 2$ is called cyclic $p$-gonal if it admits a cyclic group of automorphisms $C_{p}$ of order $p$ such that the quotient space $X/C_{p}$ has genus 0. If in addition $C_{p}$ is not normal in the full automorphism $G$, then we call $G$ a non-normal cyclic $p$-gonal group. In the following we classify all non-normal $p$-gonal groups.
description: 18 pages, 5 figures
Samara no. 4 [French].
Creators: name: Millennium Seed Bank Project
Publisher: name: Royal Botanic Gardens, Kew
Year: 2003
Subjects: subject: African Botanic Gardens Network
subject: Chile
subject: Mali
subject: Seed collecting
subject: Egypt
subject: Mexico
subject: Millennium Seed Bank Project
subject: Bioinformatics
subject: FOS: Computer and information sciences
subject: Burkina Faso
subject: Ex situ conservation
subject: Seed banks
subject: Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES)
subject: Plant conservation
subject: United States
subject: Namibia
subject: Western Australia

description: IF = none.
description: Ardingly, West Sussex
The $p$-adic Corlette-Simpson correspondence for abeloids
Creators: name: Heuer, Ben
name: Mann, Lucas
name: Werner, Annette
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14K15, 14G45, 14G22

description: For an abeloid variety $A$ over a complete algebraically closed field extension $K$ of $\mathbb Q_p$, we construct a $p$-adic Corlette-Simpson correspondence, namely an equivalence between finite-dimensional continuous $K$-linear representations of the Tate module and a certain subcategory of the Higgs bundles on $A$. To do so, our central object of study is the category of vector bundles for the $v$-topology on the diamond associated to $A$. We prove that any pro-finite-étale $v$-vector bundle can be built from pro-finite-étale $v$-line bundles and unipotent $v$-bundles. To describe the latter, we extend the theory of universal vector extensions to the $v$-topology and use this to generalise a result of Brion by relating unipotent $v$-bundles on abeloids to representations of vector groups.
Toward the classification of Moufang loops of order 64
Creators: name: Vojtěchovský, Petr
Publisher: name: arXiv
Year: 2007
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20N05

description: We show how to obtain all nonassociative Moufang loops of order less than 64 and 4262 nonassociative Moufang loops of order 64 in a unified way. We conjecture that there are no other nonassociative Moufang loops of order 64. The main idea of the computer search is to modify precisely one quarter of the multiplication table in a certain way, previously applied to small 2-groups.
description: 16 pages
Linear groupoids and the associated wreath products
Creators: name: Phillips, J. D.
name: Vojtěchovský, Petr
Publisher: name: arXiv
Year: 2007
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20N05, 18B40, 20B40

description: A groupoid identity is said to be linear of length $2k$ if the same $k$ variables appear on both sides of the identity exactly once. We classify and count all varieties of groupoids defined by a single linear identity. For $k=3$, there are 14 nontrivial varieties and they are in the most general position with respect to inclusion. Hentzel et. al. showed that the linear identity $(xy)z = y(zx)$ implies commutativity and associativity in all products of at least 5 factors. We complete their project by showing that no other linear identity of any length behaves this way, and by showing how the identity $(xy)z = y(zx)$ affects products of fewer than 5 factors; we include distinguishing examples produced by the finite model builder Mace4. The corresponding combinatorial results for labelled binary trees are given. We associate a certain wreath product with any linear identity. Questions about linear groupoids can therefore be transferred to groups and attacked by group-theoretical computational tools, e.g., GAP. Systematic notation and diagrams for linear identities are devised. A short equational basis for Boolean algebras involving the identity $(xy)z = y(zx)$ is presented, together with a proof produced by the automated theorem prover Otter.
description: 19 pages
Ahaetulla prasina subsp. prasina Reinwardt 1827
Creators: name: Leviton, Alan E.
name: Siler, Cameron D.
name: Weinell, Jeffrey L.
name: Brown, Rafe M.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Repitilia
Squamata
Colubridae
Ahaetulla
Ahaetulla prasina
Ahaetulla prasina prasina (reinwardt

description: Ahaetulla prasina prasina (Reinwardt in F. Boie, 1827)
Green Vine Snake; Oriental Whipsnake; Gunther’s Whip Snake
Dryophis prasinus Reinwardt in H. Boie, 1826b:238 (nomen nudum); in F. Boie, 1827:col. 545.— Boettger, 1895:4–5; 1898:106.— Griffin, 1909:600; 1911:264.— Taylor, 1922a:219.
Ahaetulla prasina prasina, Leviton, 1968:81, fig. 1.— Gaulke, 1999:278.
TYPE LOCALITY AND TYPE SPECIMEN (S).— Java, Indonesia. Syntypes (2): RMNH 782 (now RMNH 782 and 47582 [fide Wallach et al. [2014:20]).
PHILIPPINE DISTRIBUTION (Map 2C [p. 113]).— Balabac, Busuanga, Calamian Ids. (Calauit Id.), Coron, Culion, Palawan.
GENERAL DISTRIBUTION (OTHER THAN PHILIPPINES).— Indonesia: Borneo (Kalimantan), Riau (also as Riou); East Malaysia: (Borneo [Sabah, Sarawak]), West Malaysia (Malay Peninsula); Singapore.
CONSERVATION STATUS [IUCN].— Least Concern [2016] ver. 3.1.
description: Published as part of Leviton, Alan E., Siler, Cameron D., Weinell, Jeffrey L. & Brown, Rafe M., 2018, Synopsis of the Snakes of the Philippines A Synthesis of Data from Biodiversity Repositories, Field Studies, and the Literature, pp. 399-568 in Proceedings of the California Academy of Sciences (Oxford, England) (Oxford, England) 64 (14) on page 417, DOI: 10.5281/zenodo.11512589
Relation between concurrence and Berry phase of an entangled state of two spin 1/2 particles
Creators: name: Basu, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have studied here the influence of the Berry phase generated due to a cyclic evolution of an entangled state of two spin 1/2 particles. It is shown that the measure of formation of entanglement is related to the cyclic geometric phase of the individual spins. \\
description: 6 pages. Accepted in Europhys. Letters (likely to be published in vol 73, pp1-6 (2006))
Orthography resources
Creators: name: Tchatchouang, Guy
name: Clem, Emily
name: Maier, Erik Hans
name: Najarian, Evelyn
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: nnz

description: This bundle contains resources related to the Tswefap orthography that was developed as part of the research project. Included is an illustrated book intended to teach the orthography.
Towards A Theory of National and Organizational Level Ethical Leadership for Sustainable Competitive Advantage
Creators: name: C.C. Tan
name: SangchanKantabutra
Publisher: name: Asian Forum on Business Education (AFBE)
Year: 2014
Subjects: Ethical leadership,extra-role behavior,corporate citizenship behavior,employee's organizational commitment,Hofstede's cultural dimensions,innovation,competitiveness

description: 1, 7, AFBE Journal
Interfacial Ferroelectricity by van-der-Waals Sliding
Creators: name: Stern, Maayan Vizner
name: Waschitz, Yuval
name: Cao, Wei
name: Nevo, Iftach
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Sela, Eran
name: Urbakh, Michael
name: Hod, Oded
name: Shalom, Moshe Ben
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Despite their ionic nature, many layered diatomic crystals avoid internal electric polarization by forming a centrosymmetric lattice at their optimal anti-parallel van-der-Waals stacking. Here, we report a stable ferroelectric order emerging at the interface between two naturally-grown flakes of hexagonal-boron-nitride, which are stacked together in a metastable non-centrosymmetric parallel orientation. We observe alternating domains of inverted normal polarization, caused by a lateral shift of one lattice site between the domains. Reversible polarization switching coupled to lateral sliding is achieved by scanning a biased tip above the surface. Our calculations trace the origin of the phenomenon to a subtle interplay between charge redistribution and ionic displacement, and our minimal cohesion model predicts further venues to explore the unique "slidetronics" switching.
Scanned notes
Creators: name: Tchatchouang, Guy
name: Clem, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: nnz

description: Scan of Emily Clem's notes. Contains notes for elicitation sessions on the following dates (each session is bookmarked in the pdf): 2016-09-21, 2016-12-01, 2017-09-15, 2017-09-22, 2017-09-29, 2017-10-06, 2017-10-13, 2017-11-17, 2017-11-21, 2017-12-01, 2017-12-08, 2017-12-13, 2017-12-15, 2018-02-01. Scans of Emily Clem's notebook with notes for additional elicitation sessions can be found in bundle 2016-14.030.
Phase transitions in 3D Ising model with cluster weight by Monte Carlo method
Creators: name: Wang, Ziyang
name: Feng, Le
name: Zhang, Wanzhou
name: Ding, Chengxiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A cluster weight Ising model is proposed by introducing an additional cluster weight in the partition function of the traditional Ising model. It is equivalent to the O($n$) loop model or $n$-component face cubic loop model on the two-dimensional lattice, but on the three-dimensional lattice, it is still not very clear whether or not these models have the same universality. In order to simulate the cluster weight Ising model and search for new universality class, we apply a cluster algorithm, by combining the color-assignation and the Swendsen-Wang methods. The dynamical exponent for the absolute magnetization is estimated to be $z=0.45(3)$ at $n=1.5$, consistent with that of the traditional Swendsen-Wang methods. The numerical estimation of the thermal exponent $y_t$ and magnetic exponent $y_m$, show that the universalities of the two models on the three-dimensional lattice are different. We obtain the global phase diagram containing paramagnetic and ferromagnetic phases. The phase transition between the two phases are second order at $1\leq n< n_c$ and first order at $n\geq n_c$, where $n_c\approx 2$. The scaling dimension $y_t$ equals to the system dimension $d$ when the first-order transition occurs. Our results are helpful in the understanding of some traditional statistical mechanics models.
description: 9 pages, 8 figures
Modeling the dynamics and control of power systems with high share of renewable energies
Creators: name: Auer, Sabine
name: Kittel, Tim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: A challenge for renewable and hybrid power systems is the dynamically stable integration of Renewable Energy Sources (RES). This paper specifically investigates the influence of intermittent RES and measurement delays from power electronic resources on frequency stability. In addition it presents an Open-Source framework to undertake dynamic RES modeling. First, for local intermittent fluctuations in lossy distribution grids I find a remarkable and subtle but robust interplay of dynamical and topological properties, which is largely absent for lossless grids. Second, I show how delays may induce resonance catastrophes and how the existence of critical delays sets an upper limit for measurement times. Further, I investigate whether centralized vs. decentralized power production, for different grid topologies, changes this behavior. Third, the code used for producing the above results is in the process of being published as an open-source Software framework called PowerDynamics.jl being developed in the programming language Julia. It will cover the rich novel dynamics caused by the integration of RES with the implementation of Differential Algebraic (DAEs), Delayed Differential (DDEs) and Stochastic Differential Algebraic Equations (SDAEs). Altogether, this paper investigates the stability of future power grids moving towards integrating more aspects of renewable energy dynamics and presents an adequate modeling framework for RES integration studies.
description: arXiv admin note: text overlap with arXiv:1702.08707
Experimental investigation of a strain softening approach to predicting failure of notched composite laminates
Creators: name: Kongshavn, Ingrid A.
Publisher: name: University of British Columbia
Year: 2009

description: This work describes an experimental investigation of a strain softening approach to the prediction of fracture in notched composite laminates. This approach has been found to more accurately predict fracture of large notched coupons or structures than traditional approaches. Strain softening accounts for the effect of damage in front of the notch tip, by the post-peak region of a strain softening curve. This region is traditionally defined by a stress that decreases with increasing strain. A physical understanding of the post-peak region of the curve is required to better examine the predictive capabilities of strain softening. For this to be achieved, a detailed physical understanding of the damage in the process zone is required. In this study, two carbon fibre reinforced laminate material systems were examined. An overheight compact tension (OCT) specimen was developed to grow damage in a stable manner. The displacements in front of the notch tip indicated the progression of damage across the specimen width throughout the test. A detailed physical description of the damage, which consisted of a crack and process zone were obtained. The sequence of damage growth in the process zone was determined. Tensile specimens cut from the process zones indicated a preliminary shape of the strain softening curves for the two material systems. Finally, the experimental results were used to calibrate a preliminary F E M strain softening analysis of the OCT specimens. The preliminary F E M results suggest that a strain softening material response is necessary to capture the progressive damage growth across the specimen width.
Relativistic calculations of pionic and kaonic atoms hyperfine structure
Creators: name: Trassinelli, Martino
name: Indelicato, Paul
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present the relativistic calculation of the hyperfine structure in pionic and kaonic atoms. A perturbation method has been applied to the Klein-Gordon equation to take into account the relativistic corrections. The perturbation operator has been obtained \textit{via} a multipole expansion of the nuclear electromagnetic potential. The hyperfine structure of pionic and kaonic atoms provide an additional term in the quantum electrodynamics calculation of the energy transition of these systems. Such a correction is required for a recent measurement of the pion mass.
Additional file 1 of The secretor status of blood group antigens in the saliva in people with oral cancers: a systematic review
Creators: name: Walpola, T.
name: Jayawardene, K. L. T. D.
name: Weerasekara, I.
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: Additional file 1.
The varieties of loops of Bol-Moufang type
Creators: name: Phillips, J. D.
name: Vojtěchovský, Petr
Publisher: name: arXiv
Year: 2007
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20N05

description: A loop identity is of Bol-Moufang type if two of its three variables occur once on each side, the third variable occurs twice on each side, and the order in which the variables appear on both sides is the same, viz. $((xy)x)z=x(y(xz))$. Loop varieties defined by one identity of Bol-Moufang type include groups, Bol loops, Moufang loops and C-loops. We show that there are exactly 14 such varieties, and determine all inclusions between them, providing all necessary counterexamples, too. This extends and completes the programme of Fenyves.
description: 10 pages
Analytical Estimate of the Effect of Spherical Inhomogeneities on Luminosity Distance and Redshift
Creators: name: Brouzakis, N.
name: Tetradis, N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We provide an analytical estimate of the effect of a spherical inhomogeneity on light beams that travel through it. We model the interior of the inhomogeneity in terms of the Lemaitre-Tolman-Bondi metric. We assume that the beam source is located outside the inhomogeneity. We study the relative deviations of travelling time, redshift, beam area and luminosity distance from their values in a homogeneous cosmology. They depend on the ratio Hb=H r_0 of the radius r_0 of the inhomogeneity to the horizon distance 1/H. For an observer located at the center, the deviations are of order Hb^2. For an observer outside the inhomogeneity, the deviations of crossing time and redshift are of order Hb^3. The deviations of beam area and luminosity distance are of order Hb^2. However, when averaged over all possible locations of the observer outside the inhomogeneity, they also become of order Hb^3. We discuss the implications for the possibility of attributing the observed cosmological acceleration to the emergence of large-scale structure.
description: 11 pages, references added, discussion expanded
A weakly compressible hybridizable discontinuous Galerkin formulation for fluid-structure interaction problems
Creators: name: La Spina, Andrea
name: Kronbichler, Martin
name: Giacomini, Matteo
name: Wall, Wolfgang A.
name: Huerta, Antonio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 65M60, 76D07, 76M10

description: A scheme for the solution of fluid-structure interaction (FSI) problems with weakly compressible flows is proposed in this work. A novel hybridizable discontinuous Galerkin (HDG) method is derived for the discretization of the fluid equations, while the standard continuous Galerkin (CG) approach is adopted for the structural problem. The chosen HDG solver combines robustness of discontinuous Galerkin (DG) approaches in advection-dominated flows with higher order accuracy and efficient implementations. Two coupling strategies are examined in this contribution, namely a partitioned Dirichlet-Neumann scheme in the context of hybrid HDG-CG discretizations and a monolithic approach based on Nitsche's method, exploiting the definition of the numerical flux and the trace of the solution to impose the coupling conditions. Numerical experiments show optimal convergence of the HDG and CG primal and mixed variables and superconvergence of the postprocessed fluid velocity. The robustness and the efficiency of the proposed weakly compressible formulation, in comparison to a fully incompressible one, are also highlighted on a selection of two and three dimensional FSI benchmark problems.
description: 49 pages, 20 figures, 2 tables
Global Mindset: Organizational Consciousness; And Sustainable Leadership: The New Path of Corporate Excellence
Creators: name: Koustab Ghosh
name: Chatterjee, Samir Ranjan
Publisher: name: Asian Forum on Business Education (AFBE)
Year: 2014
Subjects: Global mindset,corporate social responsibility,leadership competencies,sustainable leadership,sustainable development

description: 2, 7, AFBE Journal
The varieties of quasigroups of Bol-Moufang type: An equational reasoning approach
Creators: name: Phillips, J. D.
name: Vojtěchovský, Petr
Publisher: name: arXiv
Year: 2007
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20N05

description: A quasigroup identity is of Bol-Moufang type if two of its three variables occur once on each side, the third variable occurs twice on each side, the order in which the variables appear on both sides is the same, and the only binary operation used is the multiplication, viz. $((xy)x)z=x(y(xz))$. Many well-known varieties of quasigroups are of Bol-Moufang type. We show that there are exactly 26 such varieties, determine all inclusions between them, and provide all necessary counterexamples. We also determine which of these varieties consist of loops or one-sided loops, and fully describe the varieties of commutative quasigroups of Bol-Moufang type. Some of the proofs are computer-generated.
description: 15 pages
1000 days of lowest frequency emission from the low-luminosity GRB 171205A
Creators: name: Maity, Barun
name: Chandra, Poonam
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the lowest frequency measurements of gamma-ray burst (GRB) 171205A with the upgraded Giant Metrewave Radio Telescope (uGMRT) covering a frequency range from 250--1450 MHz and a period of $4-937$ days. It is the first GRB afterglow detected at 250--500 MHz frequency range and the second brightest GRB detected with the uGMRT. Even though the GRB is observed for nearly 1000 days, there is no evidence of transition to non-relativistic regime. We also analyse the archival ${\it Chandra}$ X-ray data on day $\sim 70$ and day $\sim 200$. We also find no evidence of a jet break from the analysis of combined data. We fit synchrotron afterglow emission arising from a relativistic, isotropic, self-similar deceleration as well as from a shock-breakout of wide-angle cocoon. Our data also allow us to discern the nature and the density of the circumburst medium. We find that the density profile deviates from a standard constant density medium and suggests that the GRB exploded in a stratified wind like medium. Our analysis shows that the lowest frequency measurements covering the absorbed part of the light curves are critical to unravel the GRB environment. Our data combined with other published measurements indicate that the radio afterglow has contribution from two components: a weak, possibly slightly off-axis jet and a surrounding wider cocoon, consistent with the results of Izzo et al. (2019). The cocoon emission likely dominates at early epochs, whereas the jet starts to dominate at later epochs, resulting in flatter radio lightcurves.
description: Accepted for publication in ApJ