cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Introduction to solvable lattice models in statistical and mathematical physics
Creators: name: Deguchi, Tetsuo
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Some features of integrable lattice models are reviewed for the case of the six-vertex model. By the Bethe ansatz method we derive the free energy of the six-vertex model. Then, from the expression of the free energy we show analytically the critical singularity near the phase transition in the anti-ferroelectric regime, where the essential singularity similar to the Kosterlitz-Thouless transition appears. We discuss the connection of the six-vertex model to the conformal field theory with c=1. We also introduce various exactly solvable models defined on two-dimensional lattices such as the chiral Potts model and the IRF models. We show that the six-vertex model has rich mathematical structures such as the quantum groups and the braid group. The graphical approach is emphasized in this review. We explain the meaning of the Yang-Baxter equation by its diagram. Furthermore, we can understand the defining relation of the algebraic Bethe ansatz by the graphical representation. We can thus easily translate formulas of the algebraic Bethe ansatz into those of the statistical models. As an illustration, we show explicitly how we can derive Baxter's expressions from those of the algebraic Bethe ansatz.
description: 32 pages, 10 figures. Published in "Classical and Quantum Integrable Systems: Theory and Applications" (ISBN 07503 09598), Institute of Physics Publishing, (2003) http://bookmarkphysics.iop.org/
APPLICATION OF PHYTOTECHNOLOGY IN DETERMINING PLANT SPECIES FOR GREENSPACE IN THE CITY OF PALANGKA RAYA
Creators: name: YETRIE LUDANG
Publisher: name: figshare
Year: 2020
Subjects: subject: 91503 Engineering Practice
subject: FOS: Other engineering and technologies

description: This study aims to obtain scientific evidence for plant species in their ability to absorb carbon dioxide, to rank plants based on their ability to absorb carbon dioxide, and to obtain the format of area and distribution. Experimental methods of plant species based on the types that have been commonly used as urban greening, and traditionally based plant species. The results obtained indicate that plant-based types of local wisdom are scientifically proven to show superiority in the rate of carbon dioxide absorption. There are plant species, both local wisdom and urban greening plants, which have specific fluctuating absorption rates
From the Ground Truth Up: Doing AI Ethics from Practice to Principles
Creators: name: Brusseau, James
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Recent AI ethics has focused on applying abstract principles downward to practice. This paper moves in the other direction. Ethical insights are generated from the lived experiences of AI-designers working on tangible human problems, and then cycled upward to influence theoretical debates surrounding these questions: 1) Should AI as trustworthy be sought through explainability, or accurate performance? 2) Should AI be considered trustworthy at all, or is reliability a preferable aim? 3) Should AI ethics be oriented toward establishing protections for users, or toward catalyzing innovation? Specific answers are less significant than the larger demonstration that AI ethics is currently unbalanced toward theoretical principles, and will benefit from increased exposure to grounded practices and dilemmas.
Amblyomma dissimile C.L.Koch 1844
Creators: name: Basu, A. K.
name: Basu, M.
name: Adesiyun, A. A.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Ixodida
Ixodidae
Amblyomma
Amblyomma dissimile

description: Amblyomma dissimile
 Neumann (1899) is credited for the identification of A. dissimile in Trinidad. Nuttall et al. (1926) recorded this tick in Trinidad from snakes (Lachesis mutans) and iguanas. Turk (1948) found Amblyomma trinitatis, a synonym of A. dissimile, on a ground lizard at St. Augustine. Aitken et al. (1968a and 1969) recorded A. dissimile, during their survey of arthropods for natural virus infection and found it on various species of snake, large lizards, caimans, large toads and tortoises. Dindial (1977) reported the presence of A. dissimile from iguanas, frogs and snakes both in Trinidad and Tobago. Voltzit (2007) also mentioned the presence of A. dissimile which feeds on reptiles and toads.
Distribution: Florida, Mexico, Georgia, West Indies to Argentina (Cruz 2001; Voltzit 2007).
description: Published as part of Basu, A. K., Basu, M. & Adesiyun, A. A., 2012, A Review On Ticks (Acari: Ixodoidea: Ixodidae, Argasidae), Associated Pathogens And Diseases Of Trinidad And Tobago, pp. 39-50 in Acarologia 52 (1) on page 44, DOI: 10.1051/acarologia/20122034, http://zenodo.org/record/4667077
Amblyomma humerale
Creators: name: Basu, A. K.
name: Basu, M.
name: Adesiyun, A. A.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Ixodida
Ixodidae
Amblyomma
Amblyomma humerale

description: Amblyomma humerale
 Amblyomma humerale was collected from yellowfooted tortoise, Geochelone denticulate from Mayaro (Aitken et al. 1968a; Robbins et al. 2003). Everard and Tikasingh (1973) found A. humerale on rodents (Oryzomys capito and Proechimys guyannensis) from Turure Forest, Trinidad. Nava et al. (2007b) and Voltzit (2007) also mention the presence of A. humerale in Trinidad. Other observed hosts include birds (Morshed et al. 2005), lizards, opossums, anteaters (Labruna et al. 2002), and dogs (Barros- Battesti et al. 2006).
 Distribution: Brazil, Guyana, Venezuela, Colombia, Ecuador and French Guiana (Guglielmone et al. 2003; Voltzit 2007).
description: Published as part of Basu, A. K., Basu, M. & Adesiyun, A. A., 2012, A Review On Ticks (Acari: Ixodoidea: Ixodidae, Argasidae), Associated Pathogens And Diseases Of Trinidad And Tobago, pp. 39-50 in Acarologia 52 (1) on page 44, DOI: 10.1051/acarologia/20122034, http://zenodo.org/record/4667077
Ergodic behavior of locally regulated branching populations
Creators: name: Hutzenthaler, M.
name: Wakolbinger, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K35 (Primary) 60J60, 60J80, 92D25 (Secondary)

description: For a class of processes modeling the evolution of a spatially structured population with migration and a logistic local regulation of the reproduction dynamics, we show convergence to an upper invariant measure from a suitable class of initial distributions. It follows from recent work of Alison Etheridge that this upper invariant measure is nontrivial for sufficiently large super-criticality in the reproduction. For sufficiently small super-criticality, we prove local extinction by comparison with a mean field model. This latter result extends also to more general local reproduction regulations.
description: Published at http://dx.doi.org/10.1214/105051606000000745 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Engagement of U. Hill Secondary students at the UBC Farm
Creators: name: Chan, Adam
name: Dennis, Jessica
name: Falzone, Elenora
name: Koyanagi, Alison
name: Lo, Chloe
name: Ruan, Andrew
Publisher: name: The University of British Columbia
Year: 2012

description: A way to improve the sustainability of the UBC community food system is to strengthen UBC’s relationship with its community partners. The main goal of this project is to initiate a relationship between University Hill Secondary School and UBC Farm. Based on interviews with various stakeholders and literature research on the existing foods education programs in North America, our team is confident that a relationship will be beneficial to both parties. Concern has been raised over children and youths’ lack of knowledge on food systems and healthy eating. Furthermore, there is currently an increasing disconnect between youth and their outdoor environment and surrounding community. Once University Hill Secondary School moves to its new location in 2012 it will conveniently be within walking distance to the UBC Farm. The UBC Farm can act as an outdoor classroom for the students to provide secondary school students with food systems education and a connection with their environment and community. U.Hill is encouraged to incorporate the food grown at the Farm into its Food and Nutrition classes, and also students are welcome to sign up for volunteering positions at the Farm. Lesson plans are designed according to the Vancouver School Board Food and Nutrition class curriculum. The “Introduction to Food System” lesson plan serves as a preparatory lecture for the Spring Planting lesson, which will take place at the Farm. Suggestions for how other subjects can link curriculum to the Farm are provided. This project has initiated a link between U.Hill and UBC Farm and stakeholders are encouraged to use the information provided and to implement the recommendations it in ways that are most adequate to their programs. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Lifting the dust veil from the Globular Cluster Palomar2
Creators: name: Bonatto, Charles
name: Chies-Santos, Ana
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This work employs high-quality {\em Hubble Space Telescope} ({\em HST}) Advanced Camera for Surveys (ACS) F606W and F814W photometry to correct for the differential reddening affecting the colour-magnitude diagram (CMD) of the poorly-studied globular cluster (GC) Palomar\,2. Differential reddening is taken into account by assuming that morphological differences among CMDs extracted across the field of view of Palomar\,2 correspond essentially to shifts (quantified in terms of $δE(B-V)$) along the reddening vector due to a non-uniform dust distribution. The average reddening difference over all partial CMDs is $\overline{δE(B-V)}=0.24\pm0.08$, with the highest reaching $δE(B-V) =0.52$. The corrected CMD displays well-defined and relatively narrow evolutionary sequences, especially for the evolved stars, i.e. the red-giant, horizontal and asymptotic giant branches (RGB, HB and AGB, respectively). The average width of the upper main sequence and RGB profiles of the corrected CMD corresponds to 56\% of the original one. Parameters measured on this CMD show that Palomar\,2 is $\approx13.25$\,Gyr old, has the mass $M\sim1.4\times10^5\,m_\odot$ stored in stars, is affected by the foreground $E(B-V)\approx0.93$, is located at $d_\odot\approx26$\,Kpc from the Sun, and is characterized by the global metallicity $Z/Zo\approx0.03$, which corresponds to the range $-1.9\leq [Fe/H] \leq-1.6$ (for $0.0\leq[α/Fe]\leq+0.4$), quite consistent with other outer halo GCs. Additional parameters are the absolute magnitude $M_V\approx-7.8$, and the core and half-light radii $r_C\approx2.6$\,pc and $R_{HL}\approx4.7$\,pc, respectively.
description: Accepted for publication by MNRAS
Dynamic GPU Energy Optimization for Machine Learning Training Workloads
Creators: name: Wang, Farui
name: Zhang, Weizhe
name: Lai, Shichao
name: Hao, Meng
name: Wang, Zheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: GPUs are widely used to accelerate the training of machine learning workloads. As modern machine learning models become increasingly larger, they require a longer time to train, leading to higher GPU energy consumption. This paper presents GPOEO, an online GPU energy optimization framework for machine learning training workloads. GPOEO dynamically determines the optimal energy configuration by employing novel techniques for online measurement, multi-objective prediction modeling, and search optimization. To characterize the target workload behavior, GPOEO utilizes GPU performance counters. To reduce the performance counter profiling overhead, it uses an analytical model to detect the training iteration change and only collects performance counter data when an iteration shift is detected. GPOEO employs multi-objective models based on gradient boosting and a local search algorithm to find a trade-off between execution time and energy consumption. We evaluate the GPOEO by applying it to 71 machine learning workloads from two AI benchmark suites running on an NVIDIA RTX3080Ti GPU. Compared with the NVIDIA default scheduling strategy, GPOEO delivers a mean energy saving of 16.2% with a modest average execution time increase of 5.1%.
description: Accepted to be published at IEEE Transactions on Parallel and Distributed System (IEEE TPDS)
Massive gravity with non-minimal coupling
Creators: name: Gumrukcuoglu, A. Emir
name: Kimura, Rampei
name: Koyama, Kazuya
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose new massive gravity theories with 5 dynamical degrees of freedom. We evade uniqueness theorems regarding the form of the kinetic and potential terms by adopting the "generalized massive gravity" framework, where a global translation invariance is broken. By exploiting the rotation symmetry in the field space, we determine two novel classes of theories. The first one is an extension of generalized massive gravity with a non-minimal coupling. On the other hand, the second theory produces a mass term that is different from de Rham, Gabadadze, Tolley construction and trivially has 5 degrees of freedom. Both theories allows for stable cosmological solutions without infinite strong coupling, which are free of ghost and gradient instabilities.
description: v2 : accepted for publication in PRD
Ornithodoros (Alectorobius) denmarki Kohls, Sonenshine & Clifford 1965
Creators: name: Basu, A. K.
name: Basu, M.
name: Adesiyun, A. A.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Ixodida
Argasidae
Ornithodoros
Ornithodoros denmarki

description: Ornithodoros (Alectorobius) denmarki
 The larvae, nymphs and adults of O. (A.) denmarki, a new species (Kohls et al. 1965), which was provisionally identified as O. (A.) capensis from Trinidad by Denmark and Clifford (1962), were found in nesting sites of sooty and noddy terns on Soldado Rock, Trinidad. Aitken et al. (1969) recorded O. (A.) denmarki, during their survey of arthropods for natural virus infection.
 Ornithodoros (A.) denmarki is known to transmit Hughes viruses in USA Florida, NW Mexico, Venezuela, Cuba and Trinidad; Farallon virus in California, Oregon, USA; Soldado in Hawaii, Seychelles, Ethiopia and Trinidad; Raza virus in USA and Midway virus in Hawaii, Mexico (Labuda and Nuttall 2004).
 Distribution: California, Hawaii, Florida, Ethiopia, Mexico, Jamaica and Cuba (Kohls et al. 1965; Guglielmone et al. 2003)
description: Published as part of Basu, A. K., Basu, M. & Adesiyun, A. A., 2012, A Review On Ticks (Acari: Ixodoidea: Ixodidae, Argasidae), Associated Pathogens And Diseases Of Trinidad And Tobago, pp. 39-50 in Acarologia 52 (1) on page 42, DOI: 10.1051/acarologia/20122034, http://zenodo.org/record/4667077
Scale of Quantum Gravity
Creators: name: Han, Tao
name: Willenbrock, Scott
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the effective field theory of quantum gravitation coupled to N_s scalars, N_f fermions, and N_V vectors, tree unitarity is violated at an energy squared of E_{CM}^2 = 20(G_N N)^{-1}, where N = {2/3}N_s + N_f + 4N_V and G_N is Newton's constant. This is related to radiative corrections proportional to G_N N E^2 (where E is the typical energy), due to loops of such particles. New physics must enter before E_{CM}=5.6 x 10^{18} GeV in the standard model, and 4.6 x 10^{18} GeV in the minimal supersymmetric standard model.
description: 6 pages. Accepted for publication in PLB
Artificial neural networks for nonlinear pulse shaping in optical fibers
Creators: name: Boscolo, Sonia
name: Finot, Christophe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We use a supervised machine-learning model based on a neural network to predict the temporal and spectral intensity profiles of the pulses that form upon nonlinear propagation in optical fibers with both normal and anomalous second-order dispersion. We also show that the model is able to retrieve the parameters of the nonlinear propagation from the pulses observed at the output of the fiber. Various initial pulse shapes as well as initially chirped pulses are investigated.
A Hermite WENO scheme with artificial linear weights for hyperbolic conservation laws
Creators: name: Zhao, Zhuang
name: Qiu, Jianxian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M60, 35L65

description: In this paper, a fifth-order Hermite weighted essentially non-oscillatory (HWENO) scheme with artificial linear weights is proposed for one and two dimensional hyperbolic conservation laws, where the zeroth-order and the first-order moments are used in the spatial reconstruction. We construct the HWENO methodology using a nonlinear convex combination of a high degree polynomial with several low degree polynomials, and the associated linear weights can be any artificial positive numbers with only requirement that their summation equals one. The one advantage of the HWENO scheme is its simplicity and easy extension to multi-dimension in engineering applications for we can use any artificial linear weights which are independent on geometry of mesh. The another advantage is its higher order numerical accuracy using less candidate stencils for two dimensional problems. In addition, the HWENO scheme still keeps the compactness as only immediate neighbor information is needed in the reconstruction and has high efficiency for directly using linear approximation in the smooth regions. In order to avoid nonphysical oscillations nearby strong shocks or contact discontinuities, we adopt the thought of limiter for discontinuous Galerkin method to control the spurious oscillations. Some benchmark numerical tests are performed to demonstrate the capability of the proposed scheme.
description: 35 pages, 13 figures. arXiv admin note: text overlap with arXiv:1906.09462
Policy Center Methodology: Its Implications For Marketing Research and Extension
Creators: name: Knutson, Ron
name: Young, Bob
name: Knutson, Ron
name: Young, Bob
Publisher: name: Unknown
Year: 1993
Subjects: Research and Development/Tech Change/Emerging Technologies
Teaching/Communication/Extension/Profession

description: In the 1980's, the center phenomena swept university campuses. Centers for addressing policy issues became particularly prominent. We are aware of policy centers related to agricultural and food issues at the following universities: Purdue, Minnesota, Georgetown, Oklahoma State, Cornell, Kansas State, Iowa State, Missouri, Texas A&M, Arkansas and California. This list is not meant to be exhaustive, but rather is illustrative of a concept that has proliferated. The purposes of this paper are: • To provide a perspective on the reasons for the proliferation of the policy center concept. • To explore the usefulness of what centers may be able to do for marketing research and extension.
X-Ray Silicon Drift Detector-CMOS Front-End System with High Energy Resolution at Room Temperature
Creators: name: Bertuccio, G.
name: Ahangarianabhari, M.
name: Graziani, C.
name: Macera, D.
name: Shi, Y.
name: Gandola, M.
name: Rachevski, A.
name: Rashevskaya, I.
name: Vacchi, A.
name: Zampa, G.
name: Zampa, N.
name: Bellutti, P.
name: Giacomini, G.
name: Picciotto, A.
name: Piemonte, C.
name: Zorzi, N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We present a spectroscopic system constituted by a Silicon Drift Detector (SDD) coupled to a CMOS charge sensitive preamplifier, named SIRIO, specifically designed to reach ultimate low noise levels. The SDD, with an active area of 13 mm , has been manufactured by optimizing the production processes in order to reduce the anode current, successfully reaching current densities between 17 pA/cm and 25 pA/cm at 20 for drift fields ranging from 100 V/cm to 500 V/cm. The preamplifier shows minimum intrinsic noise levels of 1.27 and 1.0 electrons r.m.s. at 20 and 30 , respectively. At room temperature ( ) the 5.9 keV and the pulser lines have 136 eV and 64 eV FWHM, respectively, corresponding to an equivalent noise charge of 7.4 electrons r.m.s.; the noise threshold is at 165 eV. The energy resolution, as measured on the pulser line, ranges from 82 eV FWHM (9.4 electrons r.m.s.) at 30C down to 29 eV FWHM (3.3 electrons r.m.s.) at 30C .
Delocalization and wave-packet dynamics in one-dimensional diluted Anderson models
Creators: name: de Moura, F. A. B. F.
name: Santos, M. N. B.
name: Fulco, U. L.
name: Lyra, M. L.
name: Lazo, E.
name: Onell, M. E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the nature of one-electron eigen-states in a one-dimensional diluted Anderson model where every Anderson impurity is diluted by a periodic function $f(l)$ . Using renormalization group and transfer matrix techniques, we provide accurate estimates of the extended states which appear in this model, whose number depends on the symmetry of the diluting function $f(l)$. The density of states (DOS) for this model is also numerically obtained and its main features are related to the symmetries of the diluting function $f(l)$. Further, we show that the emergence of extended states promotes a sub-diffusive spread of an initially localized wave-packet.
description: 6 pages, 6 figures, to appear in EPJB
Quantum boomerang effect for interacting particles
Creators: name: Janarek, Jakub
name: Delande, Dominique
name: Cherroret, Nicolas
name: Zakrzewski, Jakub
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: When a quantum particle is launched with a finite velocity in a disordered potential, it may surprisingly come back to its initial position at long times and remain there forever. This phenomenon, dubbed ``quantum boomerang effect'', was introduced in [Phys. Rev. A 99, 023629 (2019)]. Interactions between particles, treated within the mean-field approximation, are shown to partially destroy the boomerang effect: the center of mass of the wave packet makes a U-turn, but does not completely come back to its initial position. We show that this phenomenon can be quantitatively interpreted using a single parameter, the average interaction energy.
description: 7 + 2 pages, 9 + 2 figures, added discussion about strong disorder case in Conclusion
Bringing Your Own View: Graph Contrastive Learning without Prefabricated Data Augmentations
Creators: name: You, Yuning
name: Chen, Tianlong
name: Wang, Zhangyang
name: Shen, Yang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Self-supervision is recently surging at its new frontier of graph learning. It facilitates graph representations beneficial to downstream tasks; but its success could hinge on domain knowledge for handcraft or the often expensive trials and errors. Even its state-of-the-art representative, graph contrastive learning (GraphCL), is not completely free of those needs as GraphCL uses a prefabricated prior reflected by the ad-hoc manual selection of graph data augmentations. Our work aims at advancing GraphCL by answering the following questions: How to represent the space of graph augmented views? What principle can be relied upon to learn a prior in that space? And what framework can be constructed to learn the prior in tandem with contrastive learning? Accordingly, we have extended the prefabricated discrete prior in the augmentation set, to a learnable continuous prior in the parameter space of graph generators, assuming that graph priors per se, similar to the concept of image manifolds, can be learned by data generation. Furthermore, to form contrastive views without collapsing to trivial solutions due to the prior learnability, we have leveraged both principles of information minimization (InfoMin) and information bottleneck (InfoBN) to regularize the learned priors. Eventually, contrastive learning, InfoMin, and InfoBN are incorporated organically into one framework of bi-level optimization. Our principled and automated approach has proven to be competitive against the state-of-the-art graph self-supervision methods, including GraphCL, on benchmarks of small graphs; and shown even better generalizability on large-scale graphs, without resorting to human expertise or downstream validation. Our code is publicly released at https://github.com/Shen-Lab/GraphCL_Automated.
description: WSDM 2022
High order ADER schemes and GLM curl cleaning for a first order hyperbolic formulation of compressible flow with surface tension
Creators: name: Chiocchetti, Simone
name: Peshkov, Ilya
name: Gavrilyuk, Sergey
name: Dumbser, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this work, we introduce two novel reformulations of a recent weakly hyperbolic model for two-phase flow with surface tension. In the model, the tracking of phase boundaries is achieved by using a vector interface field, rather than a scalar tracer, so that the surface-force stress tensor can be expressed as an algebraic function of the state variables, without requiring the computation of gradients of the tracer. An interesting and important feature of the model is that this interface field obeys a curl involution constraint, that is, the vector field is required to be curl-free at all times. The proposed modifications are intended to restore the strong hyperbolicity of the model, and are closely related to divergence-preserving numerical approaches developed in the field of numerical magnetohydrodynamics (MHD). The first strategy is based on the theory of Symmetric Hyperbolic and Thermodynamically Compatible (SHTC) systems forwarded by Godunov in the 60s and 70s and yields a modified system of governing equations which includes some symmetrisation terms, in analogy to the approach adopted later by Powell et al for the ideal MHD equations. The second technique is an extension of the hyperbolic Generalized Lagrangian Multiplier (GLM) divergence cleaning approach, forwarded by Munz et al in applications to the Maxwell and MHD equations. We solve the resulting nonconservative hyperbolic PDE systems with high order ADER Discontinuous Galerkin (DG) methods with a posteriori Finite Volume subcell limiting and carry out a set of numerical tests concerning flows dominated by surface tension as well as shock-driven flows. We also provide a new exact solution to the equations, show convergence of the schemes for orders of accuracy up to ten in space and time, and investigate the role of hyperbolicity and of curl constraints in the long-term stability of the computations.
Amblyomma rotundatum
Creators: name: Basu, A. K.
name: Basu, M.
name: Adesiyun, A. A.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Ixodida
Ixodidae
Amblyomma
Amblyomma rotundatum

description: Amblyomma rotundatum
 Jones et al. (1972) stated that Amblyomma rotundatum, exclusively a parasite of cold-blooded animals (Floch and Fauman 1958), was exploited toads in Trinidad.
 Distribution: ranges from southern US to northern Argentina and Caribbean Islands (Jones et al. 1972; Voltzit 2007; Guglielmone and Nava 2010).
description: Published as part of Basu, A. K., Basu, M. & Adesiyun, A. A., 2012, A Review On Ticks (Acari: Ixodoidea: Ixodidae, Argasidae), Associated Pathogens And Diseases Of Trinidad And Tobago, pp. 39-50 in Acarologia 52 (1) on page 44, DOI: 10.1051/acarologia/20122034, http://zenodo.org/record/4667077
Comparing the temperatures of galaxy clusters from hydro-N-body simulations to Chandra and XMM-Newton observations
Creators: name: Mazzotta, P.
name: Rasia, E.
name: Moscardini, L.
name: Tormen, G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Theoretical studies of the physical processes guiding the formation and evolution of galaxies and galaxy clusters in the X-ray are mainly based on the results of numerical hydrodynamical N-body simulations, which in turn are often directly compared to X-ray observations. Although trivial in principle, these comparisons are not always simple. We demonstrate that the projected spectroscopic temperature of thermally complex clusters obtained from X-ray observations is always lower than the emission-weighed temperature, which is widely used in the analysis of numerical simulations. We show that this temperature bias is mainly related to the fact that the emission-weighted temperature does not reflect the actual spectral properties of the observed source. This has important implications for the study of thermal structures in clusters, especially when strong temperature gradients, like shock fronts, are present. Because of this bias, in real observations shock fronts appear much weaker than what is predicted by emission-weighted temperature maps, and may even not be detected. This may explain why, although numerical simulations predict that shock fronts are a quite common feature in clusters of galaxies, to date there are very few observations of objects in which they are clearly seen. To fix this problem we propose a new formula, the spectroscopic-like temperature function, and show that, for temperature larger than 3 keV, it approximates the spectroscopic temperature better than few per cent, making simulations more directly comparable to observations.
description: Submitted for publication in MNRAS; 15 pages, 10 color figures and 13 BW figures,mn2e.cls. High resolution figures available here: http://people.roma2.infn.it/~mazzotta/preprints/mazzotta.pdf
Chandra Multiwavelength Plane (ChaMPlane) Survey: an Introduction
Creators: name: Grindlay, J. E.
name: Hong, J.
name: Zhao, P.
name: Laycock, S.
name: Berg, M. van den
name: Koenig, X.
name: Schlegel, E. M.
name: Cohn, H. N.
name: Lugger, P. M.
name: Rogel, A. B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We introduce the Chandra Multiwavelength Plane (ChaMPlane) Survey, designed to measure or constrain the populations of low-luminosity (Lx > ~10^31 erg/s) accreting white dwarfs, neutron stars and stellar mass black holes in the Galactic Plane and Bulge. ChaMPlane incorporates two surveys, X-ray (Chandra) and optical (NOAO 4m-Mosaic imaging), and a followup spectroscopy and IR identification program. The survey has now extended through the first 6 years of Chandra data using serendipitous sources detected in 105 distinct ACIS-I and -S fields observed in 154 pointings and covered by 65 deep Mosaic images in V, R, I, and H-alpha. ChaMPlane incorporates fields with galactic latitude |b| ~20 ksec, and (where possible) minimum NH. We describe the scientific goals and introduce the X-ray and optical/IR processing and databases. We derive preliminary constraints on the space density or luminosity function of cataclysmic variables from the X-ray/optical data for 14 fields in the Galactic Anticenter. The lack of ChaMPlane CVs in these Anticenter fields suggests their space density is ~ 3x below the value (3 x 10^-5 pc^-3) found for the solar neighborhood by previous X-ray surveys. Companion papers describe the X-ray and optical processing in detail, optical spectroscopy of ChaMPlane sources in selected Anticenter fields and IR imaging results for the Galactic Center field. An Appendix introduces the ChaMPlane Virtual Observatory (VO) for online access to the X-ray and optical images and source catalogs for ready display and further analysis.
description: 10 pages, 7 figures, 2 tables, accepted in ApJ for publication
Horizontal SCA Attacks against kP Algorithm Using K-Means and PCA
Creators: name: Aftowicz, Marcin
name: Kabin, Ievgen
name: Klann, Dan
name: Varabei, Yauhen
name: Dyka, Zoya
name: Langendoerfer, Peter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences
subject: E.3; I.2
subject: 68M25

description: Side Channel Analysis attacks take advantage of the information leaked from the implementations of cryptographic algorithms. In this paper we describe two key revealing methods which are based on machine learning algorithms: K-means and PCA. We performed the attacks against ECDSA implementations without any prior knowledge about the key and achieved 100% accuracy for an implementation without any countermeasures against horizontal attacks and 88.7% accuracy for an implementation with bus address sequencing. In the scenario where the kP operation inputs are controlled by the attacker (as during signature verification), we achieved 98.3% accuracy for the implementation with countermeasures.
Ornithodoros (Subparmatus) viguerasi
Creators: name: Basu, A. K.
name: Basu, M.
name: Adesiyun, A. A.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Ixodida
Argasidae
Ornithodoros
Ornithodoros viguerasi

description: Ornithodoros (Subparmatus) viguerasi
 Kohls et al. (1965) recorded O. (S.) viguerasi from Mormoops megalophylla tumidiceps bats at Mount Tamana, and from Pteronotus r. rubiginosa bats in Port of Spain, Tamana Hill cave, and Diego Martin. Aitken et al. (1968a) recorded O. (S.) viguerasi from the lesser naked-backed bat (Pteronotus davyi) from Bush Forest.
 Distribution: Cuba, Dominican Republic, Jamaica, Puerto Rico, Venezuela. Costa Rica, Haiti and Mexico (Cruz 2001; Guglielmone et al. 2003)
description: Published as part of Basu, A. K., Basu, M. & Adesiyun, A. A., 2012, A Review On Ticks (Acari: Ixodoidea: Ixodidae, Argasidae), Associated Pathogens And Diseases Of Trinidad And Tobago, pp. 39-50 in Acarologia 52 (1) on page 43, DOI: 10.1051/acarologia/20122034, http://zenodo.org/record/4667077
Rationale for Public Intervention in Food and Agricultural Markets
Creators: name: Padberg, D. I.
name: Love, Alan
name: Padberg, D. I.
name: Love, Alan
Publisher: name: Unknown
Year: 1993
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Public Economics

description: For a century, economists have recognized that free and functional markets do not always exist for farm products. Con sistent with this recognition, several contingencies were developed for use by farmers, and others, to protect and enhance their interests in relation to product buyers and input suppliers. Probably the most visible and significant of these contingencies were antitrust policy, cooperatives and marketing orders. Each of these policy instruments enables changing the structure and/or behavior of the market. Changing the basic power balance between buyer and seller is intended in each case. In this sense, these policies are considerably more ambitious than the group of policies (such as market news and grades and standards) that are intended to facilitate orderly marketing. Marketing orders and cooperatives are seen as a special privilege for the agriculture and food sector. Advantages farmers receive from all of these policies can lead to over production unless entry is restricted. Many people feel it is inappropriate for the federal government to facilitate marketing programs that restrict output and increase price. For these and other reasons, these policies have been more controversial than policies intended to enhance natural market forces. This paper presents an historic evolution of the central ideas used in justifying government interventions to reshape agricultural market structure and organization. These justifications are then placed into a more modern context. A tentative assessment is drawn concerning how the historic rationale stands up to changing times. An effort is made to determine if there are aspects of modern and emerging food markets representing hazards not found in history. Finally, suggestions are made concerning what types of policies might better fit the modem context.
Factors Influencing Consumer Involvement in Community Supported Fishery Programs
Creators: name: Ratliff, English
name: Vassalos, Michael
name: Hu, Wuyang
name: Ratliff, English
name: Vassalos, Michael
name: Hu, Wuyang
Publisher: name: Unknown
Year: 2018
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Community Supported Fishery
subject: Seafood
subject: Multinomial Logit
subject: South Carolina

description: The adverse impact of overfishing in the fish stocks has generated an increased interest among consumers and producers alike for alternative seafood production and marketing practices. One innovate marketing outlet that is growing in popularity over the last years are Community Supported Fisheries (CSFs). CSFs are an arrangement between fishermen and consumers, where consumers pay a fee for a weekly share of seafood. A major challenge for further CSF development is attracting more participants. However, research on this topic is limited. This study extends the literature by investigating the impact of demographic and lifestyle characteristics on the probability that a consumer will join a CSF. The dataset was obtained from an online survey distributed to South Carolina residents the intention to join a CSF was measured by answers to the question: “Would you be interested in joining a CSF?” Respondents were provided with three choices: No, Not sure, Yes. A multinomial logit model was utilized to analyze the data. Results indicate that consumers who are most likely willing to join a CSF frequent farmer’s markets and specialty stores when purchasing seafood. Most demographic characteristics did not have a significant impact on whether or not a person is willing to join. On the other hand, consumers who purchase local food because they believe local food are of higher quality are more likely to join a CSF.
Made in Philippines : Artistic Demonstrations of the Filipino American Diaspora through the lenses of Carlos Villa, Manuel Ocampo, and Michael Arcega
Creators: name: Hunt, Tiffany Lynn
name: Langa, Helen
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Description to be added
The TESS light curve of AI Phoenicis
Creators: name: Maxted, P. F. L.
name: Gaulme, Patrick
name: Graczyk, D.
name: Hełminiak, K. G.
name: Johnston, C.
name: Orosz, Jerome A.
name: Prša, Andrej
name: Southworth, John
name: Torres, Guillermo
name: Davies, Guy R.
name: Ball, Warrick
name: Chaplin, William J
name: .
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Accurate masses and radii for normal stars derived from observations of detached eclipsing binary stars are of fundamental importance for testing stellar models and may be useful for calibrating free parameters in these model if the masses and radii are sufficiently precise and accurate. We aim to measure precise masses and radii for the stars in the bright eclipsing binary AI Phe, and to quantify the level of systematic error in these estimates. We use several different methods to model the TESS light curve of AI Phe combined with spectroscopic orbits from multiple sources to estimate precisely the stellar masses and radii together with robust error estimates. We find that the agreement between different methods for the light curve analysis is very good but some methods underestimate the errors on the model parameters. The semi-amplitudes of the spectroscopic orbits derived from spectra obtained with modern echelle spectrographs are consistent to within 0.1%. The masses of the stars in AI Phe are $M_1 = 1.1938 \pm 0.0008 M_{\odot}$ and $M_2 = 1.2438 \pm 0.0008M_{\odot}$, and the radii are $R_1 = 1.8050 \pm 0.0022 R_{\odot}$ and $R_2 = 2.9332 \pm 0.0023 R_{\odot}$. We conclude that it is possible to measure accurate masses and radii for stars in bright eclipsing binary stars to a precision of 0.2% or better using photometry from TESS and spectroscopy obtained with modern echelle spectrographs. We provide recommendations for publishing masses and radii of eclipsing binary stars at this level of precision.
description: Accepted for publication in MNRAS. 12 pages, 4 tables and 8 figures
Education programs in the LFS Orchard Garden and Agora Café
Creators: name: Chen, Elaine Yi-Ling
name: Hatakka, Kristi
name: Lam, Wennie
name: Liang, Janette
name: Salmabadi, Sara
name: Witt, Victoria
Publisher: name: The University of British Columbia
Year: 2012

description: The value of garden-based learning is undeniable in its capacity to revolutionize current paradigms towards ecological literacy for educating future generations. Perhaps the most significant connections created are the ones that instill a sense of place and understanding of nature and all living organisms. The UBCFSP is a community-base action program that consists of many partners and collaborators. Through a collaborative effort between the Faculty of Education, Faculty of Land and Food Systems, and our project stakeholders at the University of British Columbia (UBC), the establishment of an outdoor classroom has been initiated. This space is part of the LFS Orchard Garden at UBC and will be utilized to help educate teachers and equip them with relevant skills and information. Some of the barriers to participation included lack of knowledge, accessibility to resources, and teacher-confidence working in an outdoor environment. In response, our group created two workshops to facilitate, as well as a resource list that will ideally support teachers in implementing outdoor education. The feedback we received from our stakeholders indicated that our workshops were a good starting point for the program and could be further developed to include more material and connection to other workshops. Developing garden-classroom connections in outdoor learning spaces will help to encourage students to spend more time outside ultimately assisting in the development of children’s sense of place in natural green spaces. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Looking with Colonna's Eyes : Re-evaluating Michelangelo 's Colonna Pieta and widening the lens of Vittoria's patronage to include Michelangelo's late Annunciation campaign.
Creators: name: Hunt, Tiffany Lynn
name: Butler Wingfield, Kim
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Description to be added
On the Ising-Heisenberg model with the doubly decorated network structure I
Creators: name: Strecka, Jozef
name: Jascur, Michal
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using an exact mapping transformation method, magnetic properties of a spin-1/2 and spin-1 doubly decorated Ising-Heisenberg model are investigated in detail. By assuming that both interaction parameters are ferromagnetic, we found in addition to an usual ferromagnetic phase another two phases with a nontrivial long-range order.
description: 3 pages, 2 figures, to be presented at conference ICM 2003
Adapted gauge to a quasilocal measure of the black holes recoil
Creators: name: Healy, James
name: Lousto, Carlos O.
name: Rosato, Nicole
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We explore different gauge choices in the moving puncture formulation in order to improve the accuracy of a linear momentum measure evaluated on the horizon of the remnant black hole produced by the merger of a binary. In particular, motivated by constant values studies, we design a gauge via a variable shift parameter $mη(\vec{r}(t))$ such that it takes a low asymptotic (and at the orbiting punctures) value, while about the standard value of 2 at the final hole horizon. This choice then follows the remnant black hole as it moves due to its net recoil velocity. We find that this choice keeps the accuracy of the binary evolution and, once the asymptotic value of the parameter $mη$ is chosen about or below 1.0, it produces more accurate results for the recoil velocity than the corresponding evaluation of the radiated linear momentum at infinity, for typical numerical resolutions. We also find that the choice of the $\partial_t$-gauge (at our working resolutions) is more accurate in this regard of computing recoil velocities than the $\partial_0$-gauge. Detailed studies of an unequal mass $q=m_1/m_2=1/3$ nonspinning binary are provided and then verified for other mass ratios $(q=1/2,1/5)$ and spinning $(q=1)$ binary black hole mergers.
description: 14 pages, 9 figures