cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
$T\bar{T}$ flow as characteristic flows
Creators: name: Hou, Jue
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that method of characteristics provides a powerful new point of view on $T\bar{T}$-and related deformations. Previously, the method of characteristics has been applied to $T\bar{T}$-deformation mainly to solve Burgers' equation, which governs the deformation of the \emph{quantum} spectrum. In the current work, we study \emph{classical} deformed quantities using this method and show that $T\bar{T}$ flow can be seen as a characteristic flow. Exploiting this point of view, we re-derive a number of important known results and obtain interesting new ones. We prove the equivalence between dynamical change of coordinates and the generalized light-cone gauge approaches to $T\bar{T}$-deformation. We find the deformed Lagrangians for a class of $T\bar{T}$-like deformations in higher dimensions and the $(T\bar{T})^α$-deformation in 2d with generic $α$, generalizing recent results in arXiv:2206.03415 and arXiv:2206.10515.
description: 38 pages, 2 figures, references updated
Spin-carrier coupling induced ferromagnetism and giant resistivity peak in EuCd$_2$P$_2$
Creators: name: Sunko, Veronika
name: Sun, Yue
name: Vranas, Mayia
name: Homes, Christopher C.
name: Lee, Changmin
name: Donoway, Elizabeth
name: Wang, Zhi-Cheng
name: Balguri, Sudhaman
name: Mahendru, Mira B.
name: Ruiz, Alejandro
name: Gunn, Brandon
name: Basak, Rourav
name: Schierle, Enrico
name: Weschke, Eugene
name: Tafti, Fazel
name: Frano, Alex
name: Orenstein, Joseph
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: EuCd$_2$P$_2$ is notable for its unconventional transport: upon cooling the metallic resistivity changes slope and begins to increase, ultimately 100-fold, before returning to its metallic value. Surprisingly, this giant peak occurs at 18K, well above the Néel temperature ($T_N$) of 11.5K. Using a suite of sensitive probes of magnetism, including resonant x-ray scattering and magneto-optical polarimetry, we have discovered that ferromagnetic order onsets above $T_N$ in the temperature range of the resistivity peak. The observation of inverted hysteresis in this regime shows that ferromagnetism is promoted by coupling of localized spins and itinerant carriers. The resulting carrier localization is confirmed by optical conductivity measurements.
From Community to Text and Back. On Semiotics and Ant as Text-Based Methods for Fleeting Objects of Study
Creators: name: Pelizza, Annalisa
Publisher: name: Tecnoscienza – Italian Journal of Science & Technology Studies
Year: 2011

description: This article illustrates a case study where the adoption of epistemological assumptions and data analysis techniques borrowed from both semiotics and ANT have enabled the researcher to transcend the limits that characterise traditional studies on online communities underpinned by a “sociology of the social” approach. Today, the very concept of “online community” seems to be at stake, to the point that it is no longer clear whether there exist online ties that are specific enough to be called “communitarian”. In order to analyse such an opaque and unstable object of study, innovative methods specifically developed to study fuzzy objects have to be devised and some epistemological questions have to be addressed. Approaches like semiotics and ANT turn out to be useful exactly because they use texts as “handles” to grasp heterogeneous, transient, objects of study. This article discusses in details a “funnel-like” method of analysis in a research field that has too often forgone the critique of epistemological assumptions inherited from other disciplines.
description: Tecnoscienza – Italian Journal of Science & Technology Studies, Vol. 1 No. 2 (2010): Tecnoscienza Nr. 2
Empirical analysis of the MEA and MFE RNA secondary structure prediction
Creators: name: Hajiaghayi, Monir
Publisher: name: University of British Columbia
Year: 2010

description: RNA molecules play critical roles in the cells of organisms, including roles in gene regulation, catalysis, and synthesis of proteins. Since their functions largely depend on their folded structures, having accurate and efficient methods for RNA structure prediction is increasingly valuable. A number of computational approaches have been developed to predict RNA secondary structure. There have been some recent advances for two of these approaches, namely Minimum Free Energy (MFE) and Maximum Expected Accuracy (MEA). The main goals of this thesis are twofold: 1) to empirically analyze the accuracy (i.e., the number of correctly predicted base pairs) of the MFE and MEA algorithms in different energy models and 2) to estimate the free energy parameters specifically for the MEA by using the constraint generation (CG) approach. We present new results on the degree to which different factors influence the prediction accuracy MFE and MEA. The factors that we consider are: structural information that is provided in addition to RNA sequence, thermodynamic parameters, and data set size. Structural information significantly increases the accuracy of these methods. The relative performance of MFE and MEA changes according to the free energy parameters used; however, both have the best performance when they use Andronescu et al.'s BL* parameter set. Having bigger data sets results in less variation in prediction accuracy of the MFE and MEA algorithms. Furthermore, we try to find better free energy parameters for the MEA algorithm. For our purpose, we adapt the CG approach so that it specifically optimizes parameters for MEA. Overall, when parameters are trained using MFE, they slightly outperform the parameters estimated for MEA. For the MEA algorithm, we also study the effect of parameter γ which controls the relative sensitivity and positive predictive value (PPV). We obtain that when γ=1, the accuracy of MEA (in terms of F-measure on the BL* parameter set) is better than its accuracy for other values of γ. We also find that the sensitivity and PPV of MEA will interestingly change for different values of γ using the BL* parameter set.
Intensive treatment program for problem gamblers
Creators: name: Alcohol, Alberta
Publisher: name: Alberta Alcohol and Drug Abuse Commission (AADAC)
Year: 1999
Subjects: subject: Compulsive gamblers -- Treatment -- Alberta
subject: Compulsive gambling -- Alberta
subject: Gamblers -- Treatment -- Alberta
subject: Gambling -- Alberta
subject: Gambling Literature

description: The Intensive Treatment Program for Problem Gamblers has been designed for the increasing numbers of clients who seek treatment for problems related to gambling. The program is intended to provide treatment where clients need more than individual counselling, yet can't attend a residential inpatient treatment program. This Intensive Treatment Program for Problem Gamblers is recommended for those who recognize that a gambling problem exists and have a desire to make some changes. It is not recommended for "precontemplations."
Investigation of the new cataclysmic variable 1RXS J180834.7+101041
Creators: name: Yakin, D. G.
name: Suleimanov, V. F.
name: Borisov, N. V.
name: Shimanskii, V. V.
name: Bikmaev, I. F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of our photometric and spectroscopic studies of the new eclipsing cataclysmic variable star 1RXS J180834.7+101041. Its spectrum exhibits double-peaked hydrogen and helium emission lines. The Doppler maps constructed from hydrogen lines show a nonuniform distribution of emission in the disk similar to that observed in IP Peg. This suggests that the object can be a cataclysmic variable with tidal density waves in the disk. We have determined the component masses (M_WD =0.8 \pm 0.22 M_sun and M_RD =0.14 \pm 0.02 M_sun) and the binary inclination (i =78 \pm 1.5 deg) based on well-known relations between parameters for cataclysmic variable stars. We have modeled the binary light curves and showed that the model of a disk with two spots is capable of explaining the main observed features of the light curves.
description: 22 pages, 9 figures, 2 tables, published in Astronomy Letters, 2011, 37, 845-857
A new anisotropic bending model for nonlinear shells: Comparison with existing models and isogeometric finite element implementation
Creators: name: Savitha, Eshwar J.
name: Sauer, Roger A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: A new nonlinear hyperelastic bending model for shells formulated directly in surface form is presented, and compared to four prominently used bending models. Through an essential set of elementary nonlinear bending test cases, the stresses and moments of each model are examined analytically. Only the proposed bending model passes all the test cases while the other bending models either fail or only pass the test cases for small deformations. The proposed new bending model can handle large deformations and initially curved surfaces. It is based on the principal curvatures and their directions in the initial configuration, and it thus can have different bending moduli along those directions. These characteristics make it flexible in modeling a given material, while it does not suffer from the pathologies of existing bending models. Further, the bending models are compared computationally through four classical benchmark examples and one contact example. As the underlying shell theory is based on Kirchhoff-Love kinematics, isogeometric NURBS shape functions are used to discretize the shell surface. The linearization and efficient finite element implementation of the proposed new model are also provided.
Universal Aspects of QCD-like Theories
Creators: name: von Smekal, Lorenz
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In these lectures I review some basic examples of how the concepts of universality and scaling can be used to study aspects of the chiral and the deconfinement transition, if not in QCD directly but in QCD-like theories. As an example for flavor dynamics I discuss a quark-hadron model to describe the phase diagram of two-color QCD with the functional renormalization group. Universal aspects of deconfinement are illustrated mainly in the 2+1 dimensional SU(N) gauge theories with second order transition where many exact results from spin models can be exploited.
description: 42 pages, 25 figures, for "Physics at all scales: The Renormalization Group," the 49th Schladming Winter School on Theoretical Physics
A Matrix Model for Flat Space Quantum Gravity
Creators: name: Kar, Arjun
name: Lamprou, Lampros
name: Marteau, Charles
name: Rosso, Felipe
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We take a step towards the non-perturbative description of a two-dimensional dilaton-gravity theory which has a vanishing cosmological constant and contains black holes. This is done in terms of a double-scaled Hermitian random matrix model which non-perturbatively computes the partition function for the asymptotic Bondi Hamiltonian. To arrive at this connection we first construct the gauge-invariant asymptotic phase space of the theory and determine the relevant asymptotic boundary conditions, compute the classical S-matrix and, finally, shed light on the interpretation of the Euclidean path integral defined in previous works. We then construct a matrix model that matches the topological expansion of the latter, to all orders. This allows us to compute the fine-grained Bondi spectrum and other late time observables and to construct asymptotic Hilbert spaces. We further study aspects of the semi-classical dynamics of the finite cut-off theory coupled to probe matter and find evidence of maximally chaotic behavior in out-of-time-order correlators. We conclude with a strategy for constructing the non-perturbative S-matrix for our model coupled to probe matter and comment on the treatment of black holes in celestial holography.
description: 53+20 pages, 13 figures
A local limit theorem for a transient chaotic walk in a frozen environment
Creators: name: Leskelä, Lasse
name: Stenlund, Mikko
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K37, 60F15, 37H99, 82C41, 82D30

description: This paper studies particle propagation in a one-dimensional inhomogeneous medium where the laws of motion are generated by chaotic and deterministic local maps. Assuming that the particle's initial location is random and uniformly distributed, this dynamical system can be reduced to a random walk in a one-dimensional inhomogeneous environment with a forbidden direction. Our main result is a local limit theorem which explains in detail why, in the long run, the random walk's probability mass function does not converge to a Gaussian density, although the corresponding limiting distribution over a coarser diffusive space scale is Gaussian.
description: 26 pages, 2 figures. To appear in Stochastic Processes and their Applications
The use of information theory in evolutionary biology
Creators: name: Adami, Christoph
Publisher: name: arXiv
Year: 2011
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Information Theory (cs.IT)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: Information is a key concept in evolutionary biology. Information is stored in biological organism's genomes, and used to generate the organism as well as to maintain and control it. Information is also "that which evolves". When a population adapts to a local environment, information about this environment is fixed in a representative genome. However, when an environment changes, information can be lost. At the same time, information is processed by animal brains to survive in complex environments, and the capacity for information processing also evolves. Here I review applications of information theory to the evolution of proteins as well as to the evolution of information processing in simulated agents that adapt to perform a complex task.
description: 25 pages, 7 figures. To appear in "The Year in Evolutionary Biology", of the Annals of the NY Academy of Sciences
North American think tank on youth gambling issues : a blueprint for responsible public policy in the management of compulsive gambling : final report.
Creators: name: Shaffer, Howard, 1948-
name: George, Elizabeth M
name: Cummings, Thomas
name: North American Think Tank On Youth Gambling (1995 : Boston)
Publisher: name: Harvard Medical School, Division On Addictions
Year: 1995
Subjects: subject: Youth -- North America -- Gambling -- Prevention -- Congresses
subject: Compulsive gambling -- North America -- Prevention -- Congresses
subject: Gambling Literature

description: The North American Think Tank on Youth Gambling Issues was convened April 6-8, 1995 at Harvard Medical School in Boston, Massachusetts. Co-sponsored by the Harvard Medical School, Division on Addictions, and the Minnesota Council on Compulsive Gambling, with assistance from the Massachusetts Council on Compulsive Gambling, the event brought together key leaders from throughout the United States and Canada who represented diverse fields including government, education, the gambling industry, finance, law enforcement, the judiciary, health care and research. Recommendations were developed in seven key areas of concern: policy development, funding, law enforcement, research, treatment and training, education, and public awareness and media.
$E_6$ Models in Light of Precision $M_W$ Measurements
Creators: name: Barger, Vernon
name: Hauptmann, Cash
name: Huang, Peisi
name: Keung, Wai-Yee
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We propose a solution to the recent $W$ mass measurement by embedding the Standard Model within $E_6$ models. The presence of a new $U(1)$ group shifts the $W$ boson mass at the tree level and introduces a new gauge boson $Z^{\prime}$ which has been searched for at collider experiments. In this article, we identity the parameter space that explains the new $W$ mass measurement and is consistent with current experimental $Z^{\prime}$ searches. As $U(1)$ extensions can be accommodated in supersymmetric models, we also consider the supersymmetric scenario of $E_6$ models, and show that a 125 GeV Higgs may be easily achieved in such settings.
description: 12 pages, 3 figures, 3 tables; to be published in Physical Review D
Mapping the Research Software Ecosystem
Creators: name: Ram, Karthik
name: Howison, James
Publisher: name: Zenodo
Year: 2020
Subjects: software
software-map

description: Software is crucial to science and scholarship, offering leverage in improving individual research and collaboration within a scientific field. Good research software can have considerable science impacts but the research software ecosystem is beset with many problems. Two of the bigger challenges are visibility and discoverability. It is surprisingly hard to know who is using what software in research. Unlike commercial software, software producers cannot turn to their accounting department, nor do they have sales engineers consulting with clients. Formal citations in scientific publications cannot reliably provide evidence of software use as software is rarely cited properly or consistently, and scientific workflows are rarely made available with publications. Software use therefore lacks visibility. This makes it hard for individuals to demonstrate their contribution to research, hard for institutions to reward or recruit for software-based impact, hard for scientific fields to build needed software, and hard for science funders to know which scientific software to fund. In this hour we welcome research software maintainers to join us and learn more about the challenges and benefits of increasing visibility for their work and collectively uncover gaps that need to be filled. We'll start the discussion with short presentations on the state of the field followed by spirited discussion.
Norm-dependent convergence and stability of the inverse scattering series for diffuse and scalar waves
Creators: name: Mahankali, Srinath
name: Yang, Yunan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: This work analyzes the forward and inverse scattering series for scalar waves based on the Helmholtz equation and the diffuse waves from the time-independent diffusion equation, which are important PDEs in various applications. Different from previous works, which study the radius of convergence for the forward and inverse scattering series, the stability, and the approximation error of the series under the $L^p$ norms, we study these quantities under the Sobolev $H^s$ norm, which associates with a general class of $L^2$-based function spaces. The $H^s$ norm has a natural spectral bias based on its definition in the Fourier domain: the case $s<0$ biases towards the lower frequencies, while the case $s>0$ biases towards the higher frequencies. We compare the stability estimates using different $H^s$ norms for both the parameter and data domains and provide a theoretical justification for the frequency weighting techniques in practical inversion procedures. We also provide numerical inversion examples to demonstrate the differences in the inverse scattering radius of convergence under different metric spaces.
description: 31 pages, 6 figures
DualMotion: Global-to-Local Casual Motion Design for Character Animations
Creators: name: Peng, Yichen
name: Zhao, Chunqi
name: Xie, Haoran
name: Fukusato, Tsukasa
name: Miyata, Kazunori
name: Igarashi, Takeo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Graphics (cs.GR)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Animating 3D characters using motion capture data requires basic expertise and manual labor. To support the creativity of animation design and make it easier for common users, we present a sketch-based interface DualMotion, with rough sketches as input for designing daily-life animations of characters, such as walking and jumping.Our approach enables to combine global motions of lower limbs and the local motion of the upper limbs in a database by utilizing a two-stage design strategy. Users are allowed to design a motion by starting with drawing a rough trajectory of a body/lower limb movement in the global design stage. The upper limb motions are then designed by drawing several more relative motion trajectories in the local design stage. We conduct a user study and verify the effectiveness and convenience of the proposed system in creative activities.
description: 10 pages, 10 figures, under submission, video is here https://youtu.be/-tk8q8LSiL0
Evolution of the neutron resonances in AFe2Se2
Creators: name: Maier, T. A.
name: Hirschfeld, P. J.
name: Scalapino, D. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Recent experiments on the alkali-intercalated iron selenides have raised questions about the symmetry of the superconducting phase. Random phase approximation calculations of the leading pairing eigenstate for a tight- binding 5-orbital Hubbard-Hund model of AFe2Se2 find that a d-wave (B1g) state evolves into an extended s{\pm} (A1g) state as the system is hole-doped. However, over a range of doping these two states are nearly degenerate. Here, we calculate the imaginary part of the magnetic spin susceptibility χ"(q,ω) for these gaps and discuss how the evolution of neutron scattering resonances can distinguish between them.
Jet quenching in anisotropic flowing matter
Creators: name: Kuzmin, Matvey V.
name: López, Xoán Mayo
name: Reiten, Jared
name: Sadofyev, Andrey V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the interplay between the flow and hydrodynamic gradients in jet quenching at first order in opacity. We find that the mixed flow-gradient contributions in jet quenching are enhanced by the medium length, and survive in the eikonal limit, dominating over other medium evolution effects. The resulting modification to the jet quenching parameter and energy loss rate can be substantial, leading to ample phenomenological implications. We also compute the leading corrections to the jet broadening due to the flow velocity gradients, and consider the leading gradient effects in the medium-induced branching for general kinematics, extending the recent considerations of jets in inhomogeneous media. These results can be straightforwardly coupled to matter simulations, providing new opportunities for jet tomography in heavy-ion collisions.
description: 36 pages, 6 figures, published version
A Self-Replicating Single-Shape Tiling Technique for the Design of Highly Modular Planar Phased Arrays -- The Case of L-Shaped Rep-Tiles
Creators: name: Anselmi, Nicola
name: Tosi, Luca
name: Rocca, Paolo
name: Toso, Giovanni
name: Massa, Andrea
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The design of irregular planar phased arrays (PAs) characterized by a highly-modular architecture is addressed. By exploiting the property of self-replicating tile shapes, also known as rep-tiles, the arising array layouts consist of tiles having different sizes, but equal shape, all being generated by assembling a finite number of smaller and congruent copies of a single elementary building-block. Towards this end, a deterministic optimization strategy is used so that the arising rep-tile arrangement of the planar PA is an optimal trade-off between complexity, costs, and fitting of user-defined requirements on the radiated power pattern, while guaranteeing the complete overlay of the array aperture. As a representative instance, such a synthesis method is applied to tile rectangular apertures with L-shaped tromino tiles. A set of representative results, concerned with ideal and real antenna models, as well, is reported for validation purposes, but also to point out the possibility/effectiveness of the proposed approach, unlike state-of-the-art tiling techniques, to reliably handle large-size array apertures.
description: 56 pages, 22 figures
Electric fields generated by quantized vortices
Creators: name: Rukin, A. S.
name: Shevchenko, S. I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: It is shown that in a magnetic field quantized vortices in a superfluid obtain a real quantized electric charge concentrated in the vortex core. This charge is compensated by an opposite surface charge located at a macroscopic distance from the vortex axis. It is determined that the polarization caused by the vortex velocity field does not give rise to electric fields outside an infinite cylinder. Observation of electric fields created by the vortices is possible only near the end surfaces of the cylinder which must be closed with dielectric covers to prevent superfluid leaking. Influence of cover properties on the potential created by the vortex is researched. Potential created by the vortices on point and ring electrodes are calculated.
description: 5 pages
Validation Framework for RDF-based Constraint Languages
Creators: name: Hartmann, Thomas
Publisher: name: Karlsruhe
Year: 2016
Subjects: RDF Data Validation
RDF Data Quality
RDF Constraint Types
Constraint Formulation
Constraint Languages

description: In this thesis, a validation framework is introduced that enables to consistently execute RDF-based constraint languages on RDF data and to formulate constraints of any type. The framework reduces the representation of constraints to the absolute minimum, is based on formal logics, consists of a small lightweight vocabulary, and ensures consistency regarding validation results and enables constraint transformations for each constraint type across RDF-based constraint languages.
Prediction of the derivative discontinuity in density functional theory from an electrostatic description of the exchange and correlation potential
Creators: name: Andrade, Xavier
name: Aspuru-Guzik, Alán
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We propose a new approach to approximate the exchange and correlation (XC) functional in density functional theory. The XC potential is considered as an electrostatic potential, generated by a fictitious XC density, which is in turn a functional of the electronic density. We apply the approach to develop a correction scheme that fixes the asymptotic behavior of any approximated XC potential for finite systems. Additionally, the correction procedure gives the value of the derivative discontinuity; therefore it can directly predict the fundamental gap as a ground-state property.
description: 5 pages, 4 figures
LANDSCAPE ELEGANCE: MAGNOLIAS AS THE FOCAL POINT FOR OUTDOOR BEAUTY
Creators: name: Jing, Dr. Liu, CPA
name: Chen, Dr. Xin, PhD
Publisher: name: zap Journals
Year: 2023
Subjects: Power Relations
Management
Cultural-Artistic Processes
Education
Uees

description: Magnolia is a beautiful tree that is known for its large, fragrant flowers, evergreen leaves, and resistance to wind, dust, pollution, and pests. It is native to East Asia and is mostly planted in the region south of the Yangtze River in China. Magnolia has a pure and elegant temperament, signifying the endless life of all things. It is a high-quality greening ornamental tree species, and is commonly used in landscape configuration.
Effective Clustering Algorithms for Gene Expression Data
Creators: name: Chandrasekhar, T.
name: Thangavel, K.
name: Elayaraja, E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Genomics (q-bio.GN)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Microarrays are made it possible to simultaneously monitor the expression profiles of thousands of genes under various experimental conditions. Identification of co-expressed genes and coherent patterns is the central goal in microarray or gene expression data analysis and is an important task in Bioinformatics research. In this paper, K-Means algorithm hybridised with Cluster Centre Initialization Algorithm (CCIA) is proposed Gene Expression Data. The proposed algorithm overcomes the drawbacks of specifying the number of clusters in the K-Means methods. Experimental analysis shows that the proposed method performs well on gene Expression Data when compare with the traditional K- Means clustering and Silhouette Coefficients cluster measure.
description: 5 pages
De Rham theorem for Schwartz functions on Nash manifolds
Creators: name: Prelli, Luca
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 18F10, 14P20, 46F99

description: Here we simplify the proof of the de Rham theorem for Schwartz functions on affine Nash manifolds and generalize the result to the case of non affine Nash manifolds.
description: 7 pages
Proceedings of the Interprovincial Think Tank of Youth and Gambling : October 21-22, 1999, Winnipeg, Manitoba
Creators: name: Saskatchewan. Saskatchewan Health
name: Addictions Foundation Of Manitoba
name: Alcohol, Alberta
Publisher: name: Alberta Alcohol and Drug Abuse Commission (AADAC)
Year: 2000
Subjects: subject: Teenage gamblers -- Canada -- Congresses
subject: Gambling -- Canada -- Congresses
subject: Gambling Literature

description: Like the three interprovincial conferences before it, the Interprovincial Think Tank (IT) was rooted in the need to enhance understanding of gambling and problem gambling as it relates to the day-to-day work and personal experiences of Think Tank participants. From the beginning, our collective mandate has been to address problem gambling, and in doing so we have created opportunities to do two important things: share our knowledge and experiences; and broaden the base of understanding in the wider community. During this process, we have learned from each other as well as from the community at large. This ITT was a continuation of the exchange and the learning. For this Think Tank, the Planning Committee set i t s sites on the topic of youth and gambling. The need to explore this topic stems from three key realities. First, there is a public, political and interest-group expectation that the needs of youth be addressed in the context of problem gambling. Second, while prevalence data exist, there is uncertainty among those working in the problem gambling area about the meaning of the data. And third, uncertainty also exists around the importance of problem gambling as an issue for youth and of youth gambling as an issue for society. The proceedings of this ITT were not developed as a "blueprint for action." Rather, they are intended to provide information that will guide people as they work in their communities and collaboratively develop plans to address youth and problem gambling issues. As the reader will see, these proceedings accomplish this goal. They reveal the richness and diversity in the details that emerged as participants expressed their views and described their experiences in response to the discussion questions. While several themes around the topic of youth and gambling became defined, it was the diversity of the participants' perspectives that drove the conference towards its conclusion: no single formula can be presented to address the youth gambling issue across different communities. Instead, communities need to implement the strategies and approaches that make sense for them. The information garnered from this Think Tank will help to guide discussion and action across the country towards this end. It is evident that this Think Tank and the previous conferences have laid a strong foundation for continuing the country-wide exchange on problem gambling. The committee expresses its gratitude to the sponsors of this event as well as to all participants. The Think Tank would not have been the success it was without the energy, sense of humour and candidness of all those who took part.
Sampling--Dependent Transition Paths of Iceland-Scotland Overflow Water
Creators: name: Beron-Vera, F. J.
name: Olascoaga, M. J.
name: Helfmann, L.
name: Miron, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Probability (math.PR)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this note, we apply Transition Path Theory (TPT) from Markov chains to shed light on the problem of Iceland-Scotland Overflow Water (ISOW) equatorward export. A recent analysis of observed trajectories of submerged floats demanded revision of the traditional abyssal circulation theory, which postulates that ISOW should steadily flow along a deep boundary current (DBC) around the subpolar North Atlantic prior to exiting it. The TPT analyses carried out here allow to focus the attention on the portions of flow from the origin of ISOW to the region where ISOW exits the subpolar North Atlantic and suggest that insufficient sampling may be biasing the aforementioned demand. The analyses, appropriately adapted to represent a continuous input of ISOW, are carried out on three time-homogeneous Markov chains modeling the ISOW flow. One is constructed using a high number of simulated trajectories homogeneously covering the flow domain. The other two use much fewer trajectories which heterogeneously cover the domain. The trajectories in the latter two chains are observed trajectories or simulated trajectories subsampled at the observed frequency. While the densely sampled chain supports a well-defined DBC, the more heterogeneously sampled chains do not, irrespective of whether observed or simulated trajectories are used. Studying the sampling sensitivity of the Markov chains, we can give recommendations for enlarging the existing float dataset to improve the significance of conclusions about time-asymptotic aspects of the ISOW circulation.
description: Submitted to JPO. Comments welcomed!
Estimates of system noise temperature in W-band at SRT and effects of beam truncation due to the Gregorian radome
Creators: name: NAVARRINI, Alessandro
name: OLMI, LUCA
name: NESTI, Renzo
name: BUFFA, Franco
name: ORLATI, ANDREA
Publisher: name: O.A. Cagliari
Year: 2020

description: Si ringraziano i due referee Alessandro Orfei e Pietro Bolli per i loro utili commenti
description: We report on system noise temperature estimates from the SRT site in W-band (70-116 GHz) based on recorded atmospheric data at four specific days, three-months apart, in the period 15 Oct. 2019-15 July 2020. The estimates are based on the atmospheric model described in [1] and on the feed-horn beams model and receiver noise specification of the W-band multibeam receiver being built for the Gregorian focus of the SRT. We used different values for the antenna forward efficiency ηf to estimate the impact of such parameter on overall system noise Tsys. The beam truncation due to the 1 m diameter SRT Gregorian focus radome, which protects the receiver cabin from the atmospheric agents, is evaluated assuming that the cabin surrounding the radome contributes with a 293 K thermal noise (greater than the sky noise). The beams from the W-band receiver will be slightly truncated by the radome, especially at the lowest frequencies, where the beams are larger. We conclude that the effects of truncation on Tsys are negligible even in the scenario of lowest thermal emission from the sky, expected during winter season. The estimated seasonal variations of the atmospheric conditions at the SRT show that, for the four specific days for which the system noise temperature was calculated, the Tsys have broad minima near the 3 mm band atmospheric window, around 85-105 GHz and achieves values of order 100 K or lower during winter. The system noise increases towards the W-band receiver band edges at 70 GHz and 116 GHz; the highest Tsys is obtained at the highest frequency of the band, 116 GHz, and reaches values beyond 200 K the 15th of October, 2019 and the 15th of July, 2020.
D-Branes at del Pezzo Singularities: Global Embedding and Moduli Stabilisation
Creators: name: Cicoli, Michele
name: Krippendorf, Sven
name: Mayrhofer, Christoph
name: Quevedo, Fernando
name: Valandro, Roberto
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the context of type IIB string theory we combine moduli stabilisation and model building on branes at del Pezzo singularities in a fully consistent global compactification. By means of toric geometry, we classify all the CY manifolds with 3 < h11 < 6 which admit two identical del Pezzo singularities mapped into each other under the orientifold involution. This effective singularity hosts the visible sector containing the Standard Model while the Kaehler moduli are stabilised via a combination of D-terms, perturbative and non-perturbative effects supported on hidden sectors. We present concrete models where the visible sector, containing the Standard Model, gauge and matter content, is built via fractional D3-branes at del Pezzo singularities and all the Kaehler moduli are fixed providing an explicit realisation of both KKLT and LARGE volume scenarios, the latter with D-term uplifting to de Sitter minima. We perform the consistency checks for global embedding such as tadpole, K-theory charges and Freed-Witten anomaly cancellation. We briefly discuss phenomenological and cosmological implications of our models.
description: 44 pages + appendices, 6 figures
title: Bracon wasps for ecological pest control–a laboratory experiment
Creators: name: Lettmann, Jessica
name: Mody, Karsten
name: Kursch-Metz, Tore-Aliocha
name: Blüthgen, Nico
name: Wehner, Katja
Publisher: name: PeerJ, Inc.
Year: 2021

description: Biological control of pest insects by natural enemies may be an effective, cheap and environmentally friendly alternative to synthetic pesticides. The cosmopolitan parasitoid wasp species Bracon brevicornis Wesmael and B. hebetor Say (Hymenoptera: Braconidae) use lepidopteran species as hosts, including insect pests like Ephestia kuehniella or Ostrinia nubilalis. Here, we compare the reproductive success of both Bracon species on E. kuehniella in a laboratory experiment. We asked (1) how the reproductive success on a single host larva changes with temperature, (2) how it changes with temperature when more host larvae are present and (3) how temperature and availability of host larvae influence the efficacy of Bracon species as biological control agents. In general, differences between B. brevicornis and B. hebetor have been small. For rearing both Bracon species in the laboratory on one host larva, a temperature between 20–27 °C seems appropriate to obtain the highest number of offspring with a female-biased sex ratio. Rearing the braconid wasps on more than one host larva revealed a higher number of total offspring but less offspring per host larva on average. Again, highest numbers of offspring hatched at 27 °C and the sex ratio was independent from temperature. Although no parasitoids hatched at 12 °C and only few at 36 °C, host larvae were still paralyzed. The efficacy of B. brevicornis was higher than 80% at all numbers of host larvae presented at all temperatures while the efficacy of B. hebetor was less than 80% at 12 °C and 27 °C at low numbers of host larvae presented. In conclusion, practitioners can use either B. brevicornis or B. hebetor at low and high temperatures and at varying host densities to achieve high pest control efficacy.
Using Machine Learning To Study The Relationship Between Galaxy Morphology And Evolution
Creators: name: Peth, Michael
Publisher: name: Zenodo
Year: 2016
Subjects: thesis
machine learning
extragalactic astronomy

description: We can track the physical evolution of massive galaxies over time by characterizing the morphological signatures inherent to different mechanisms of galactic assembly.  Structural studies rely on a small set of measurements to bin galaxies into disk, spheroid and irregular classifications. These classes are correlated with colors, SF history and stellar masses. Rare and subtle features that are lost in such a generic classification scheme are important for characterizing the evolution of galaxy morphology.  We can connect the Hubble sequence observed for local galaxies to their high redshift progenitors to determine the full distribution of galaxy morphologies as a function of time over the entire lifetime of the Universe. To fully capture the complex morphological transformation of galaxies we need more useful classifications.  To accomplish such a feat in a computationally tractable way we will need to convert galaxy images to low-dimensional representations of only a few parameters.
Sense & nonsense : making decisions about drugs : teacher resource, grades 4, 5 & 6
Creators: name: Alcohol, Alberta
Publisher: name: Alberta Alcohol and Drug Abuse Commission (AADAC)
Year: 1997
Subjects: subject: Gambling Literature

description: Revised Ed.
description: Sense and Nonsense is a curriculum resource to educate children in grades 4,5 and 6 about issues around alcohol and drug use as well as gambling. Each manual is grade specific and designed to help teachers present factual information about drugs like medications, caffeine, tobacco products, and alcohol as well as lifestyle choices and information on gambling so that students will be able to make sound decisions about their use of these products in the present and future. Take a quick look at what we have to offer.
Tense logic based on finite orthomodular posets
Creators: name: Chajda, Ivan
name: Länger, Helmut
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03G12, 03B44, 03B47, 06A11, 81P10

description: It is widely accepted that the logic of quantum mechanics is based on orthomodular posets. However, such a logic is not dynamic in the sense that it does not incorporate time dimension. To fill this gap, we introduce certain tense operators on such a logic in an inexact way, but still satisfying requirements asked on tense operators in the classical logic based on Boolean algebras or in various non-classical logics. Our construction of tense operators works perfectly when the orthomodular poset in question is finite. We investigate the behaviour of these tense operators, e.g. we show that some of them form a dynamic pair. Moreover, we prove that if the tense operators preserve one of the inexact connectives conjunction or implication as defined by the authors recently in another paper, then they also preserve the other one. Finally, we show how to construct the binary relation of time preference on a given time set provided the tense operators are given, up to equivalence induced by natural quasiorders.
Removing Orbital Debris with Lasers
Creators: name: Phipps, Claude R.
name: Baker, Kevin L.
name: Bradford, Brian
name: George, E. Victor
name: Libby, Stephen B.
name: Liedahl, Duane A.
name: Marcovici, Bogdan
name: Olivier, Scot S.
name: Pleasance, Lyn D.
name: Reilly, James P.
name: Rubenchik, Alexander
name: Strafford, David N.
name: Valley, Michael T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Space Physics (physics.space-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Orbital debris in low Earth orbit (LEO) are now sufficiently dense that the use of LEO space is threatened by runaway collisional cascading. A problem predicted more than thirty years ago, the threat from debris larger than about 1 cm demands serious attention. A promising proposed solution uses a high power pulsed laser system on the Earth to make plasma jets on the objects, slowing them slightly, and causing them to re-enter and burn up in the atmosphere. In this paper, we reassess this approach in light of recent advances in low-cost, light-weight modular design for large mirrors, calculations of laser-induced orbit changes and in design of repetitive, multi-kilojoule lasers, that build on inertial fusion research. These advances now suggest that laser orbital debris removal (LODR) is the most cost-effective way to mitigate the debris problem. No other solutions have been proposed that address the whole problem of large and small debris. A LODR system will have multiple uses beyond debris removal. International cooperation will be essential for building and operating such a system.
description: 37 pages, 15 figures, in preparation for submission to Advances in Space Research
Fractal codimension of nilpotent contact points in two-dimensional slow-fast systems
Creators: name: De Maesschalck, Peter
name: Huzak, Renato
name: Janssens, Ansfried
name: Radunović, Goran
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 34E15, 34E17, 34C40, 28A80, 28A75

description: In this paper we introduce the notion of fractal codimension of a nilpotent contact point $p$, for $λ=λ_0$, in smooth planar slow$-$fast systems $X_{ε,λ}$ when the contact order $n_{λ_0}(p)$ of $p$ is even, the singularity order $s_{λ_0}(p)$ of $p$ is odd and $p$ has finite slow divergence, i.e., $s_{λ_0}(p)\leq 2(n_{λ_0}(p)-1)$. The fractal codimension of $p$ is a generalization of the traditional codimension of a slow-fast Hopf point of Liénard type, introduced in (Dumortier and Roussarie (2009)), and it is intrinsically defined, i.e., it can be directly computed without the need to first bring the system into its normal form. The intrinsic nature of the notion of fractal codimension stems from the Minkowski dimension of fractal sequences of points, defined near $p$ using the so$-$called entry$-$exit relation, and slow divergence integral. We apply our method to a slow$-$fast Hopf point and read its degeneracy (i.e., the first nonzero Lyapunov quantity) as well as the number of limit cycles near such a Hopf point directly from its fractal codimension. We demonstrate our results numerically on some interesting examples by using a simple formula for computation of the fractal codimension. We demonstrate our results numerically on some interesting examples by using a simple formula for computation of the fractal codimension.
description: 32 pages, 4 figures
MPEC 2023-X26 : 2017 HC49
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.