cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Arecibo Methanol Maser Galactic Plane Survey - III: Distances and Luminosities
Creators: name: Pandian, J. D.
name: Menten, K. M.
name: Goldsmith, P. F.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We derive kinematic distances to the 86 6.7 GHz methanol masers discovered in the Arecibo Methanol Maser Galactic Plane Survey. The systemic velocities of the sources were derived from 13CO (J=2-1), CS (J=5-4), and NH3 observations made with the ARO Submillimeter Telescope, the APEX telescope, and the Effelsberg 100 m telescope, respectively. Kinematic distance ambiguities were resolved using HI self-absorption with HI data from the VLA Galactic Plane Survey. We observe roughly three times as many sources at the far distance compared to the near distance. The vertical distribution of the sources has a scale height of ~ 30 pc, and is much lower than that of the Galactic thin disk. We use the distances derived in this work to determine the luminosity function of 6.7 GHz maser emission. The luminosity function has a peak at approximately 10^{-6} L_sun. Assuming that this luminosity function applies, the methanol maser population in the Large Magellanic Cloud and M33 is at least 4 and 14 times smaller, respectively, than in our Galaxy.
description: Accepted by ApJ
Protohalo Constraints to the Resonant Annihilation of Dark Matter
Creators: name: Cyr-Racine, Francis-Yan
name: Profumo, Stefano
name: Sigurdson, Kris
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It has recently been argued that the PAMELA, ATIC and PPB-BETS data showing an anomalous excess of high-energy cosmic ray positrons and electrons might be explained by dark matter annihilating in the Galactic halo with a cross section resonantly enhanced compared to its value in the primeval plasma. We find that with a very large annihilation cross section the flash of energetic photons and electron-positron pairs expected from dark-matter annihilation in the first protohalos that form at redshift z~40 is likely substantial and observable. As a consequence, bounds on the allowed energy injection into the primordial gas and the energy density of the diffuse gamma-ray background give rise to limits on the low-velocity dark matter cross section that can be difficult to reconcile with this interpretation of the PAMELA, ATIC and PPB-BETS results.
description: 5 pages, 4 figures; References added, estimates refined and discussion extended
Entropy of Hidden Markov Processes via Cycle Expansion
Creators: name: Allahverdyan, Armen E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Theory (cs.IT)
subject: Other Condensed Matter (cond-mat.other)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Hidden Markov Processes (HMP) is one of the basic tools of the modern probabilistic modeling. The characterization of their entropy remains however an open problem. Here the entropy of HMP is calculated via the cycle expansion of the zeta-function, a method adopted from the theory of dynamical systems. For a class of HMP this method produces exact results both for the entropy and the moment-generating function. The latter allows to estimate, via the Chernoff bound, the probabilities of large deviations for the HMP. More generally, the method offers a representation of the moment-generating function and of the entropy via convergent series.
description: 24 pages, 5 figures, published in Journal of Statistical Physics
On the horseshoe drag of a low-mass planet. II Migration in adiabatic disks
Creators: name: Masset, F. S.
name: Casoli, J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We evaluate the horseshoe drag exerted on a low-mass planet embedded in a gaseous disk, assuming the disk's flow in the coorbital region to be adiabatic. We restrict this analysis to the case of a planet on a circular orbit, and we assume a steady flow in the corotating frame. We also assume that the corotational flow upstream of the U-turns is unperturbed, so that we discard saturation effects. In addition to the classical expression for the horseshoe drag in barotropic disks, which features the vortensity gradient across corotation, we find an additional term which scales with the entropy gradient, and whose amplitude depends on the perturbed pressure at the stagnation point of the horseshoe separatrices. This additional torque is exerted by evanescent waves launched at the horseshoe separatrices, as a consequence of an asymmetry of the horseshoe region. It has a steep dependence on the potential's softening length, suggesting that the effect can be extremely strong in the three dimensional case. We describe the main properties of the coorbital region (the production of vortensity during the U-turns, the appearance of vorticity sheets at the downstream separatrices, and the pressure response), and we give torque expressions suitable to this regime of migration. Side results include a weak, negative feed back on migration, due to the dependence of the location of the stagnation point on the migration rate, and a mild enhancement of the vortensity related torque at large entropy gradient.
description: Accepted for publication in ApJ
Building extended resolvent of heat operator via twisting transformations
Creators: name: Boiti, M.
name: Pempinelli, F.
name: Pogrebkov, A. K.
name: Prinari, B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Twisting transformations for the heat operator are introduced. They are used, at the same time, to superimpose a` la Darboux N solitons to a generic smooth, decaying at infinity, potential and to generate the corresponding Jost solutions. These twisting operators are also used to study the existence of the related extended resolvent. Existence and uniqueness of the extended resolvent in the case of $N$ solitons with N "ingoing" rays and one "outgoing" ray is studied in details.
description: 15 pages, 2 figures
Additional file 1 of Hospitalization and definitive radiotherapy in lung cancer: incidence, risk factors and survival impact
Creators: name: Hazell, Sarah Z.
name: Mai, Nicholas
name: Fu, Wei
name: Hu, Chen
name: Friedes, Cole
name: Negron, Alex
name: Voong, Khinh Ranh
name: Feliciano, Josephine L.
name: Han, Peijin
name: Myers, Samantha
name: McNutt, Todd R.
name: Hales, Russell K.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: Computational Biology

description: Additional file 1: Table S1. Baseline variables and risk of multiple hospitalizations.
Improving TCP Performance on CSMA/CA Connections
Creators: name: Hu, Hao
name: Kachan, Dmitry
name: Siemans, Eduard
Publisher: name: Hochschule Anhalt
Year: 2014
Subjects: subject: 004: Datenverarbeitung, Informatik

description: Proceedings of 2nd International Conference on Applied Innovations in IT / Prof. Dr. Siemens, Eduard (2014). Jg. 2. Köthen, 2014, S. 57-60
description: In IP networks, most of packets, that have been dropped, are recovered after the expiration of retransmission timeouts. These can result in unnecessary retransmissions and needless reduction of congestion window. An inappropriate retransmission timeout has a huge impact on TCP performance. In this paper we have proved that CSMA/CA mechanism can cause TCP retransmissions due to CSMA/CA effects. For this we have observed three wireless connections that use CSMA/CA: with good link quality, poor link quality and in presence of cross traffic. The measurements have been performed using real devices. Through tracking of each transmitted packet it is possible to analyze the relation between one-way delay and packet loss probability and the cumulative distribution of distances between peaks of OWDs. The distribution of OWDs and the distances between peaks of OWDs are the most important parameters of tuning TCP retransmission timeout on CSMA/CA networks. A new perspective through investigating the dynamical relation between one-way delay and packet loss ratio depending on the link quality to enhance the TCP performance has been provided.
Morphological classifiers
Creators: name: Rodrigues, É. O.
name: Conci, A.
name: Liatsis, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: This work proposes a new type of classifier called Morphological Classifier (MC). MCs aggregate concepts from mathematical morphology and supervised learning. The outcomes of this aggregation are classifiers that may preserve shape characteristics of classes, subject to the choice of a stopping criterion and structuring element. MCs are fundamentally based on set theory, and their classification model can be a mathematical set itself. Two types of morphological classifiers are proposed in the current work, namely, Morphological k-NN (MkNN) and Morphological Dilation Classifier (MDC), which demonstrate the feasibility of the approach. This work provides evidence regarding the advantages of MCs, e.g., very fast classification times as well as competitive accuracy rates. The performance of MkNN and MDC was tested using p -dimensional datasets. MCs tied or outperformed 14 well established classifiers in 5 out of 8 datasets. In all occasions, the obtained accuracies were higher than the average accuracy obtained with all classifiers. Moreover, the proposed implementations utilize the power of the Graphics Processing Units (GPUs) to speed up processing.
description: Pattern Recognition, 2018
Madagascarophis Information
Creators: name: Ruane, Sara
name: Burbrink, Frank T.
name: Randriamahatantsoa, Bernard
name: Raxworthy, Christopher J.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Squamata
Lamprophiidae
Madagascarophis

description: KEY TO THE SPECIES OF MADAGASCAROPHIS Information is based on samples in Appendix 1 and Glaw et al. (2013). 1a. Dorsal pattern consists of distinct brown/black ocel- lae, eye color red _ _ _ _ _ _ _ _ _ _ Madagascarophis ocellatus 1b. Dorsal pattern consists of anything other than brown/black ocellae, eye color not red _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 2 2a. Extended contact of the posterior inframaxillary (genial) scales, 25 dorsal scale rows _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 3 2b. Posterior inframaxillary scales not in contact, 25 or more dorsal scale rows _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 4 3a. Ventral scales ~ 171–174, infralabials 12 or 13, body color variable _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Madagascarophis fuchsi 3b. Ventral scales ~ 189, infralabials 10, gray body color with a thin black dorsal stripe _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _  Madagascarophis lolo, new species 4a. Dorsal scale rows usually ± 29, ventral scale count 187–232 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Madagascarophis meridionalis 4b. Dorsal scale rows Ś 29, ventral scale count 180– 209 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Madagascarophis colubrinus
description: Published as part of Sara Ruane, Frank T. Burbrink, Bernard Randriamahatantsoa & Christopher J. Raxworthy, 2016, The Cat-eyed Snakes of Madagascar: Phylogeny and Description of a New Species of Madagascarophis (Serpentes: Lamprophiidae) from the Tsingy of Ankarana, pp. 712-721 in Copeia 104 (3) on page 719, DOI: 10.1643/Ch-15-346, http://zenodo.org/record/269699
description: {"references": ["Glaw, F., C. Kucharzewski, J. Koehler, M. Vences, and Z. T. Nagy. 2013 a. Resolving an enigma by integrative taxonomy: Madagascarophis fuchsi (Serpentes: Lamprophiidae), a new opisthoglyphous and microendemic snake from northern Madagascar. Zootaxa 3630: 317 - 332."]}
Phaneroserphus Pschorn-Walcher 1958
Creators: name: Can, İlyas
name: Aydemir, Habeş Bilal
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Proctotrupidae
Phaneroserphus

description: Genus Phaneroserphus Pschorn-Walcher, 1958
Type species: Proctotrupes calcar Haliday, 1839
Diagnosis: Front of head with a high to very high median vertical carina between antennal sockets and on lower part of frons; mandible with one tooth; propodeum reticulately wrinkled, its upper face with a median carina and usually a smooth area near base on each side of median carina; tarsal claws simple; pedicel about 1.1 times as long as wide; pilosity on the lower half of lateral aspect of syntergite absent; ovipositor sheath about 0.25–0. 35 as long as hind tibia (Townes & Townes 1981; Choi et al. 2016).
Distribution: Holarctic and Oriental regions (Kolyada & Chemyreva 2019).
description: Published as part of Can, İlyas & Aydemir, Habeş Bilal, 2025, New records with DNA barcodes of the family Proctotrupidae (Hymenoptera: Proctotrupoidea) from Türkiye, pp. 131-143 in Zootaxa 5621 (1) on pages 137-138, DOI: 10.11646/zootaxa.5621.1.6, http://zenodo.org/record/15220055
Diagonalization of boundary transfer matrix for the $U_{q,p}(\hat{sl}(3,{\bf C}))$ ABF model
Creators: name: Kojima, Takeo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We construct a free field realization of the ground state of the boundary transfer matrix for the $U_{q,p}(\hat{sl}_3)$ ABF model. Using this ground state and type-II vertex operator, we have a diagonalization of the boundary transfer matrix.
description: Proceedings for VIII.International Workshop "Lie theory and its applications in Physics" 15-21 June 2009, Varna, Bulgaria
Regarding to Implementation of Genetic Algorithmsin Life Cycle Management of Electrotechnical Equipment
Creators: name: Petrochenkov, Anton
Publisher: name: Hochschule Anhalt
Year: 2014
Subjects: subject: 004: Datenverarbeitung, Informatik

description: Proceedings of 2nd International Conference on Applied Innovations in IT / Prof. Dr. Siemens, Eduard (2014). Jg. 2. Köthen, 2014, S. 79-83
description: Genetic algorithms regarding to life cycle management of electrotechnical equipment are considered. The concept of "techno-individual" is introduced.
Advancing Open Access to Scholarly Publishing Journals: Increasing DOAJ's Coverage in Northern African Countries
Creators: name: Kamel, Belhamel
Publisher: name: Zenodo
Year: 2023
Subjects: open-access journals
Northern Africa
DOAJ criteria
Forum for Open Research in MENA

description: This webinar hosted by the Forum for Open Research in MENA (F.O.R.M.) in collaboration with the Directory of Open Access Journals (DOAJ) aimed to: Offer an expert overview of the open-access publishing landscape in Northern Africa, and identify some of the key challenges faced by open-access journals in the region – and the solutions to these problems. Explore how DOAJ can help to increase the impact of their journals (and thereby contribute to healthy submission pipelines and greater future indexing potential) Guide participants on how to prepare their journals for submission to DOAJ, and maximise their chances of acceptance into the index.
Overlapping Resonances in the Resistance of Superposition States to Decoherence
Creators: name: Biswas, Asoka
name: Shapiro, Moshe
name: Brumer, Paul
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Overlapping resonances are shown to provide new insights into the extent of decoherence experienced by a system superposition state in the regime of strong system- environment coupling. As an example of this general approach, a generic system comprising spin-half particles interacting with a thermalized oscillator environment is considered. We find that (a) amongst the collection of parametrized Hamiltonians, the larger the overlapping resonances contribution, the greater the maximum possible purity, and (b) for a fixed Hamiltonian, the larger the overlapping resonances contribution, the larger the range of possible values of the purity as one varies the phases in the system superposition states. Systems displaying decoherence free subspaces show that largest overlapping resonances contribution.
description: 5 figures, submitted
Nonnegative OPLS for Supervised Design of Filter Banks: Application to Image and Audio Feature Extraction
Creators: name: Muñoz-Romero, Sergio
name: García, Jerónimo Arenas
name: Gómez-Verdejo, Vanessa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Audio or visual data analysis tasks usually have to deal with high-dimensional and nonnegative signals. However, most data analysis methods suffer from overfitting and numerical problems when data have more than a few dimensions needing a dimensionality reduction preprocessing. Moreover, interpretability about how and why filters work for audio or visual applications is a desired property, especially when energy or spectral signals are involved. In these cases, due to the nature of these signals, the nonnegativity of the filter weights is a desired property to better understand its working. Because of these two necessities, we propose different methods to reduce the dimensionality of data while the nonnegativity and interpretability of the solution are assured. In particular, we propose a generalized methodology to design filter banks in a supervised way for applications dealing with nonnegative data, and we explore different ways of solving the proposed objective function consisting of a nonnegative version of the orthonormalized partial least-squares method. We analyze the discriminative power of the features obtained with the proposed methods for two different and widely studied applications: texture and music genre classification. Furthermore, we compare the filter banks achieved by our methods with other state-of-the-art methods specifically designed for feature extraction.
Effects of Primordial Mass Segregation on the Dynamical Evolution of Star Clusters
Creators: name: Vesperini, Enrico
name: McMillan, Stephen L. W.
name: Zwart, Simon Portegies
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this paper we use N-body simulations to study the effects of primordial mass segregation on the early and long-term evolution of star clusters. Our simulations show that in segregated clusters early mass loss due to stellar evolution triggers a stronger expansion than for unsegregated clusters. Tidally limited, strongly segregated clusters may dissolve rapidly as a consequence of this early expansion, while segregated clusters initially underfilling their Roche lobe can survive the early expansion and have a lifetime similar to that of unsegregated clusters. Long-lived initially segregated clusters tend to have looser structure and reach core collapse later in their evolution than initially unsegregated clusters. We have also compared the effects of dynamical evolution on the global stellar mass function (MF) of low-mass main sequence stars. In all cases the MF flattens as the cluster loses stars. The amount of MF flattening induced by a given amount of mass loss in a rapidly dissolving initially segregated cluster is less than for an unsegregated cluster. The evolution of the MF of a long-lived segregated cluster, on the other hand, is very similar to that of an initially unsegregated cluster.
description: 8 pages, 9 figures. Accepted for publication in The Astrophysical Journal
Slow imbalance relaxation and thermoelectric transport in graphene
Creators: name: Foster, Matthew S.
name: Aleiner, Igor L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We compute the electronic component of the thermal conductivity (TC) and the thermoelectric power (TEP) of monolayer graphene, within the hydrodynamic regime, taking into account the slow rate of carrier population imbalance relaxation. Interband electron-hole generation and recombination processes are inefficient due to the non-decaying nature of the relativistic energy spectrum. As a result, a population imbalance of the conduction and valence bands is generically induced upon the application of a thermal gradient. We show that the thermoelectric response of a graphene monolayer depends upon the ratio of the sample length to an intrinsic length scale l_Q, set by the imbalance relaxation rate. At the same time, we incorporate the crucial influence of the metallic contacts required for the thermopower measurement (under open circuit boundary conditions), since carrier exchange with the contacts also relaxes the imbalance. These effects are especially pronounced for clean graphene, where the thermoelectric transport is limited exclusively by intercarrier collisions. For specimens shorter than l_Q, the population imbalance extends throughout the sample; the TC and TEP asymptote toward their zero imbalance relaxation limits. In the opposite limit of a graphene slab longer than l_Q, at non-zero doping the TC and TEP approach intrinsic values characteristic of the infinite imbalance relaxation limit. Samples of intermediate (long) length in the doped (undoped) case are predicted to exhibit an inhomogeneous temperature profile, whilst the TC and TEP grow linearly with the system size. In all cases except for the shortest devices, we develop a picture of bulk electron and hole number currents that flow between thermally conductive leads, where steady-state recombination and generation processes relax the accumulating imbalance.
description: 14 pages, 4 figures
Tolman-Ehrenfest-Klein Law in non-Riemannian geometries
Creators: name: Lima, J. A. S.
name: Santos, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Heat always flows from hotter to a colder temperature until thermal equilibrium be finally restored in agreement with the usual (zeroth, first and second) laws of thermodynamics. However, Tolman and Ehrenfest demonstrated that the relation between inertia and weight uniting all forms of energy in the framework of general relativity implies that the standard equilibrium condition is violated in order to maintain the validity of the first and second law of thermodynamics. Here we demonstrate that the thermal equilibrium condition for a static self-gravitating fluid, besides being violated, is also heavily dependent on the underlying spacetime geometry (whether Riemannian or non-Riemannian). As a particular example, a new equilibrium condition is deduced for a large class of Weyl and f(R) type gravity theories. Such results suggest that experiments based on the foundations of the heat theory (thermal sector) may also be used for confronting gravity theories and prospect the intrinsic geometric nature of the spacetime structure.
description: 5 pages, no figures. Accepted for publication in Physical Review D
On the horseshoe drag of a low-mass planet. I - Migration in isothermal disks
Creators: name: Casoli, J.
name: Masset, F. S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We investigate the unsaturated horseshoe drag exerted on a low-mass planet by an isothermal gaseous disk. In the globally isothermal case, we use a formal- ism, based on the use of a Bernoulli invariant, that takes into account pressure effects, and that extends the torque estimate to a region wider than the horse- shoe region. We find a result that is strictly identical to the standard horseshoe drag. This shows that the horseshoe drag accounts for the torque of the whole corotation region, and not only of the horseshoe region, thereby deserving to be called corotation torque. We find that evanescent waves launched downstream of the horseshoe U-turns by the perturbations of vortensity exert a feed-back on the upstream region, that render the horseshoe region asymmetric. This asymmetry scales with the vortensity gradient and with the disk's aspect ratio. It does not depend on the planetary mass, and it does not have any impact on the horseshoe drag. Since the horseshoe drag has a steep dependence on the width of the horseshoe region, we provide an adequate definition of the width that needs to be used in horseshoe drag estimates. We then consider the case of locally isothermal disks, in which the tempera- ture is constant in time but depends on the distance to the star. The horseshoe drag appears to be different from the case of a globally isothermal disk. The difference, which is due to the driving of vortensity in the vicinity of the planet, is intimately linked to the topology of the flow. We provide a descriptive inter- pretation of these effects, as well as a crude estimate of the dependency of the excess on the temperature gradient.
description: Accepted for publication in ApJ
Bias of reconstructing the dark energy equation of state from the Pad$\acute{e}$ cosmography
Creators: name: Liu, Yang
name: Li, Zhengxiang
name: Yu, Hongwei
name: Wu, Puxun
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Pad$\acute{e}$ cosmography has been widely used to probe the cosmic evolution and to investigate the nature of dark energy. In this paper, we find that the Pad$\acute{e}$ approximant can describe the cosmic evolution better than the standard cosmography, and if the luminosity distance $d_L(z)$ described by the Pad$\acute{e}$ approximant is used to reconstruct the dark energy equation of state $w(z)$, then the reconstructed $w(z)$ will approach a constant, i.e. $1/3$ or $0$, when the redshift is very high. This result is general since it is independent of the coefficients in the Pad$\acute{e}$ approximant and the value of the present dimensionless matter density parameter. This intrinsic character will bias the $w(z)$ reconstruction and lead to misconception of the property of dark energy. Therefore, one must exercise caution in investigating the property of dark energy from Pad$\acute{e}$ cosmography when the high redshift data, i.e. $z>2$, are included.
description: 13 pages, 5 figures
Barbara Pentland : a biography
Creators: name: Eastman, Sheila Jane
Publisher: name: University of British Columbia
Year: 2010

description: The following thesis is primarily a biography of the Canadian composer Barbara Pentland, and within three chapters deals with three main periods of her life. At the end of each chapter is a short discussion of musical development and style. Chapter I, 1912-41, concerns her childhood, schooling, and life at home, where she was always faced with opposition to her Interest in composition by rather dominating parents. Her musical studies included a year in Paris with Cecile Gauthiez, and later, three years at the Juilliard Graduate School of Music where she studied with Frederick Jacobi and Bernaard Wagenar. During this period there was a gradual development of compositional skills, and early influences included Beethoven, Franck and Hindemith. Her music revealed a tendency towards the French-Romantic style. Chapter II, 1942-55, includes two summers of study with Aaron Copland at Tanglewood, followed by seven years in Toronto during which she taught theory and composition at the Toronto Conservatory, and enjoyed increased recognition. In 1949 came a move to Vancouver for a teaching position in the music department at the University of British Columbia. Within the two trends evident in her music at this time, the French-Romantic and the neo-classic, there was a gradual development of interest in a serial approach, which was further stimulated by Pentland's exposure to many of the works of Schoenberg at the MacDowell Colony in 1947-48. Chapter III, 1955-74, deals with her musical activities to the present. During her two trips to Europe Pentland was exposed to many new works, and was deeply impressed with the music of Webern. This led to an intensification of the serial approach and to a new concern for economy of means, two characteristics which dominate her mature style. Chapter IV attempts to give a more personal view of the composer, including problems she has encountered as a woman working in a field dominated by men, her way of life, personality, and comments from performers and composers about her works. The four appendices include a list of works, a list of first performances, an index of reviews of Pent land's works found in newspaper articles, and a short outline of the biography.
Disk-Magnetosphere Interaction and Outflows: Conical Winds and Axial Jets
Creators: name: Romanova, M. M.
name: Ustyugova, G. V.
name: Koldoba, A. V.
name: Lovelace, R. V. E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate outflows from the disk-magnetosphere boundary of rotating magnetized stars in cases where the magnetic field of a star is bunched into an X-type configuration using axisymmetric and full 3D MHD simulations. Such configuration appears if viscosity in the disk is larger than diffusivity, or if the accretion rate in the disk is enhanced. Conical outflows flow from the inner edge of the disk to a narrow shell with an opening angle 30-45 degrees. Outflows carry 0.1-0.3 of the disk mass and part of the disk's angular momentum outward. Conical outflows appear around stars of different periods, however in case of stars in the "propeller" regime, an additional - much faster component appears: an axial jet, where matter is accelerated up to very high velocities at small distances from the star by magnetic pressure force above the surface of the star. Exploratory 3D simulations show that conical outflows are symmetric about rotational axis of the disk even if magnetic dipole is significantly misaligned. Conical outflows and axial jets may appear in different types of young stars including Class I young stars, classical T Tauri stars, and EXors.
description: Invited review, conference proceedings of the meeting "Protostellar Jets in Context", 7-12 July 2008, island of Rhodes, Greece; editors: profs. Tom Ray and Kanaris Tsinganos; 10 pages, 10 figures, see animations at http://www.astro.cornell.edu/~romanova/conical.htm and http://www.astro.cornell.edu/~romanova/propeller.htm
Performance Evaluation of Security Protocols
Creators: name: Genge, Bela
name: Haller, Piroska
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: We propose a comparative performance evaluation of security protocols. The novelty of our approach lies in the use of a polynomial mathematical model that captures the performance of classes of cryptographic algorithms instead of capturing the performance of each algorithm separately, approach that is used in other papers. A major advantage of using such a model is that it does not require implementation-specific information, because the decision is based on comparing the estimated performances of protocols instead of actually evaluating them. The approach is validated by comparatively evaluating the performances of 1000 automatically generated security protocols against the performances of their actual implementations.
Safety and Liveness Guarantees through Reach-Avoid Reinforcement Learning
Creators: name: Hsu, Kai-Chieh
name: Rubies-Royo, Vicenç
name: Tomlin, Claire J.
name: Fisac, Jaime F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Reach-avoid optimal control problems, in which the system must reach certain goal conditions while staying clear of unacceptable failure modes, are central to safety and liveness assurance for autonomous robotic systems, but their exact solutions are intractable for complex dynamics and environments. Recent successes in reinforcement learning methods to approximately solve optimal control problems with performance objectives make their application to certification problems attractive; however, the Lagrange-type objective used in reinforcement learning is not suitable to encode temporal logic requirements. Recent work has shown promise in extending the reinforcement learning machinery to safety-type problems, whose objective is not a sum, but a minimum (or maximum) over time. In this work, we generalize the reinforcement learning formulation to handle all optimal control problems in the reach-avoid category. We derive a time-discounted reach-avoid Bellman backup with contraction mapping properties and prove that the resulting reach-avoid Q-learning algorithm converges under analogous conditions to the traditional Lagrange-type problem, yielding an arbitrarily tight conservative approximation to the reach-avoid set. We further demonstrate the use of this formulation with deep reinforcement learning methods, retaining zero-violation guarantees by treating the approximate solutions as untrusted oracles in a model-predictive supervisory control framework. We evaluate our proposed framework on a range of nonlinear systems, validating the results against analytic and numerical solutions, and through Monte Carlo simulation in previously intractable problems. Our results open the door to a range of learning-based methods for safe-and-live autonomous behavior, with applications across robotics and automation. See https://github.com/SafeRoboticsLab/safety_rl for code and supplementary material.
description: Accepted in Robotics: Science and Systems (RSS), 2021
Gravitational Lensing of Anisotropic Sources
Creators: name: Perna, Rosalba
name: Keeton, Charles R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In strong gravitational lensing, the multiple images we see correspond to light rays that leave the source in slightly different directions. If the source emission is anisotropic, the images may differ from conventional lensing predictions (which assume isotropy). To identify scales on which source anisotropy may be important, we study the angle delta between the light rays emerging from the source, for different lensing configurations. If the lens has a power law profile M propto R^gamma, the angle delta initially increases with lens redshift and then either diverges (for a steep profile gamma<1), remains constant (for an isothermal profile gamma=1), or vanishes (for a shallow profile gamma>1) as zl approaches zs. The scaling with lens mass is roughly delta propto M^(1/(2-gamma)). The results for an NFW profile are qualitatively similar to those for a shallow power law, with delta peaking at about half the redshift of the source (not half the distance). In practice, beaming could modify the statistics of beamed sources lensed by massive clusters: for an opening angle theta_jet, there is a probability as high as P ~ 0.02-0.07 (theta_jet/{0.5} deg)^-1 that one of the lensed images may be missed (for 2 < zs < 6). Differential absorption within Active Galactic Nuclei could modify the flux ratios of AGNs lensed by clusters; a sample of AGNs lensed by clusters could provide further constraints on the sizes of absorbing regions. Source anisotropy is not likely to be a significant effect in galaxy-scale strong lensing.
description: minor changes, accepted to MNRAS
InSAR deformation measurements of the
earthquake cycle in transcurrent tectonic
domains, analytical and analog modeling
Creators: name: Pezzo, Giuseppe <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: GEO/10 Geofisica della terra solida

description: I applied the SBAS-DInSAR method to the Mattinata Fault (MF) (Southern Italy) and to the Doruneh Fault System (DFS) (Central Iran). In the first case, I observed limited internal deformation and determined the right lateral kinematic pattern with a compressional pattern in the northern sector of the fault. Using the Okada model I inverted the observed velocities defining a right lateral strike slip solution for the MF. Even if it fits the data within the uncertainties, the modeled slip rate of 13-15 mm yr-1 seems too high with respect to the geological record. Concerning the Western termination of DFS, SAR data confirms the main left lateral transcurrent kinematics of this fault segment, but reveal a compressional component. My analytical model fits successfully the observed data and quantifies the slip in ~4 mm yr-1 and ~2.5 mm yr-1 of pure horizontal and vertical displacement respectively. The horizontal velocity is compatible with geological record.
I applied classic SAR interferometry to the October–December 2008 Balochistan (Central Pakistan) seismic swarm; I discerned the different contributions of the three Mw > 5.7 earthquakes determining fault positions, lengths, widths, depths and slip distributions, constraining the other source parameters using different Global CMT solutions. A well constrained solution has been obtained for the 09/12/2008 aftershock, whereas I tested two possible fault solutions for the 28-29/10/08 mainshocks. It is not possible to favor one of the solutions without independent constraints derived from geological data.
Finally I approached the study of the earthquake-cycle in transcurrent tectonic domains using analog modeling, with alimentary gelatins like crust analog material. I successfully joined the study of finite deformation with the earthquake cycle study and sudden dislocation. A lot of seismic cycles were reproduced in which a characteristic earthquake is recognizable in terms of displacement, coseismic velocity and recurrence time.
The environs of the ultracompact HII region G45.45+0.06
Creators: name: Paron, S.
name: Cichowolski, S.
name: Ortega, M. E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: G45.45+0.06 is an ultra-compact HII (UCHII) region extensively studied. It is known that G45.45+0.06 is embedded in a complex of UCHII regions, but up the date, the surrounding ISM in a larger spatial scale has not been analyzed. Using data from large-scale surveys: Two Micron All Sky Survey, GLIMPSE, MIPSGAL, MAGPIS and GRS, we performed a multiwavelength study of a region about 7' x 7'in the vicinity of G45.45+0.06. We found that the UCHII complex lies in a border of a larger (diameter of ~ 3') and fainter HII region, which is located at the same distance as G45.45+0.06, ~ 8 kpc. In this work, this larger HII region was called G45L. A good morphological correlation is observed between the PDRs and the molecular gas mapped in the 13CO J=1--0 and CS J=2--1 lines, suggesting that G45L may be collecting the molecular material. From a near- and mid-IR photometric study, we found three sources, likely O-type stars, that are possibly responsible for the creation of G45L. Additionally we found several YSO candidates lying preferently in the molecular shell that surrounds G45L. Our results confirm that the region southeastern the UCHII complex where G45.45+0.06 is embedded and eastern G45L is active in star formation. We suggest that G45L has been expanding during about 2 x 10^6 yr and could have triggered the formation of the zero-age main sequence stars that are ionizing the UCHII region G45.45+0.06. However we can not discard that both HII regions are coeval.
description: 17 pages, 13 figures, accepted for publication in A&A. July 2009
Foreword
Creators: name: Amziane, Sofiane
name: Plé, Olivier
Publisher: name: Academic Journal of Civil Engineering
Year: 2019

description: Welcome to this first Special Issue of Academic Journal of Civil Engineering related to the conference organized each year by AUGC (The University - Association of Civil Engineering). Established in 1981, the AUGC aims developing and promoting the academic teaching (Undergraduate, Graduate, and PhD) and researches in the civil engineering field in the universities and high schools of the French Education. The RUGC is the national forum in civil engineering organized annually by the AUGC for information dissemination and exchange, discussions and debates on research, learning and practice related to the construction field. The 36th meeting of universities in civil engineering has been organized by AUGC and ENISE (Ecole Nationale d'Ingénieurs de Saint-Etienne) at Saint-Etienne on June 20-22, 2018.
description: Academic Journal of Civil Engineering, Vol 36 No 1 (2018): Special Issue - RUGC 2018 St Etienne
Long-term secure distributed storage using quantum key distribution network with third-party verification
Creators: name: Fujiwara, Mikio
name: Nojima, Ryo
name: Tsurumaru, Toyohiro
name: Moriai, Shiho
name: Takeoka, Masahiro
name: Sasaki, Masahide
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum key distribution network with Vernam's One Time Pad encryption and secret sharing are powerful security tools to realize an information theoretically secure distributed storage system. In our previous work, a single-password-authenticated secret sharing scheme based on the QKD network and Shamir's secret sharing was experimentally demonstrated; it confirmed ITS data transmission, storage, authentication, and integrity. To achieve data integrity, an ITS message authentication code tag is employed and a data owner of the secret sharing performs both the MAC tag generation and verification. However, for a scenario in which the data owner and end users are different entities, the above approach may not work since the data owner can cheat the end users. In this paper, we resolve this problem by proposing an ITS integrity protection scheme employing a third-party verification with time-stamp.
description: 12 pages, 5 figures; Accepted in IEEE trans. Quantum Technology
Authentication and Authorization in Server Systems for Bio-Informatics
Creators: name: Madhuri, K. Lakshmi
name: Nair, T. R. Gopalakrishnan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cryptography and Security (cs.CR)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Authentication and authorization are two tightly coupled and interrelated concepts which are used to keep transactions secure and help in protecting confidential information. This paper proposes to evaluate the current techniques used for authentication and authorization also compares them with the best practices and universally accepted authentication and authorization methods. Authentication verifies user identity and provides reusable credentials while authorization services stores information about user access levels. These mechanisms by which a system checks what level of access a particular authenticated user should have to view secure resources is controlled by the system
A Search for Wide Companions to the Extrasolar Planetary System HR 8799
Creators: name: Close, Laird M.
name: Males, Jared R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The extrasolar planetary system around HR 8799 is the first multiplanet system ever imaged. It is also, by a wide margin, the highest mass system with >27 Jupiters of planetary mass past 25 AU. This is a remarkable system with no analogue with any other known planetary system. In the first part of this paper we investigate the nature of two faint objects imaged near the system. These objects are considerably fainter (H=20.4, and 21.6 mag) and more distant (projected separations of 612, and 534 AU) than the three known planetary companions b, c, and d (68-24 AU). It is possible that these two objects could be lower mass planets (of mass ~5 and ~3 Jupiters) that have been scattered to wider orbits. We make the first direct comparison of newly reduced archival Gemini adaptive optics images to archival HST/NICMOS images. With nearly a decade between these epochs we can accurately assess the proper motion nature of each candidate companion. We find that both objects are unbound to HR 8799 and are background. We estimate that HR 8799 has no companions of H<22 from ~5-15 arcsec. Any scattered giant planets in the HR 8799 system are >600 AU or less than 3 Jupiters in mass. In the second part of this paper we carry out a search for wider common proper motion objects. While we identify no bound companions to HR 8799, our search yields 16 objects within 1 degree in the NOMAD catalog and POSS DSS images with similar (+/-20 mas/yr) proper motions to HR 8799, three of which warrant follow-up observations.
description: 22 pages, 8 figures, submitted to the Astrophysical Journal
Rabaul Analysis Supplementary Plots, Scripts, and Pictures
Creators: name: Zheng, Maggie
name: Mittal, Tushar
Publisher: name: figshare
Year: 2021
Subjects: subject: 40314 Volcanology
subject: FOS: Earth and related environmental sciences
subject: 90905 Photogrammetry and Remote Sensing
subject: FOS: Environmental engineering

description: Supplementary plots, scripts, and pictures for "Pumice Raft Detection Using Machine-Learning on Multispectral Satellite Imagery"
Abstract:Most of Earth's volcanic eruptions occur underwater, and these submarine eruptions can significantly impact large-scale earth systems (e.g., enhancing local primary production by phytoplankton through supplying nutrients via hydrothermal fluids and discharged pumice rafts). However, detecting submarine eruptions is challenging due to their remote locations and eruption indicators' transient nature (e.g., floating pumice clasts, hydrothermal fluids). We can utilize global satellite imagery of 10-30 m resolution (e.g., Landsat 8, Sentinel-2) to detect new eruptions; however, the large data volumes make it challenging to systematically analyze satellite imagery on global or even regional scales. In this study, we address these challenges by developing a new semi-automated analysis framework to detect submarine eruptions through the supervised classification of satellite images on Google Earth Engine (GEE), which offers cloud-based data storage and computational resources. We present a case study using our methodology on satellite imagery from the Rabaul caldera region in Papua New Guinea. We find a large number of new unreported pumice rafts (in ~16% of images from 2017--present). After analysis of the spatial pattern of raft sightings and ancillary geophysical and visual observations, we interpret that these rafts are not eruption fed. Instead, we posit that the observed rafts represent remobilization of pumice clasts from previous historical eruptions. This novel process of raft remobilization may be common at near-shore/partially submarine caldera systems (e.g., Rabaul, Krakatau) and has significant implications for new submarine eruption detection, volcanic stratigraphy, biological dispersal by rafts, as well as processes responsible for pumice flotation.