cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Vigrant: Desktop Mobility via Live Migration
Creators: name: Jiang, D
Publisher: name: University of Liverpool Repository
Year: 2023

description: The rapid rise of mobile computing has lead to a question about how to maintain the convenience of multi-device switching, or how to keep data and applications in sync across all varied devices. There are some existing solutions to solve this problem. However, none of the existing synchronization solution are adequate enough to solve this problem. To solve the above question, we propose a new system: Vigrant. The basic idea of Vigrant is that the machine is divided into two parts: the data part and the running hardware part. When using the machine, the data part is connected to the hardware part. The hardware loads the data from the device and runs as an ordinary desktop. At the same time, the hardware synchronises the machine data with the data part. To accomplish Vigrant, we built a prototype based on QEMU-KVM virtual machine. One important question here is how to synchronise the machine data with the data part. We solve this by using the migration mechanism in a virtual machine (VM). For the pre-copy algorithm in live migration, there is a starting point that the system begins to migrate. This process is called the preparation stage. Then after some copying is complete, the system completely pauses to transfer the rest of the dirty pages and CPU state. After that, the system resumes work on the target machine. The key idea in VM migration is to copy its RAM data while it is running. But we cannot directly use this mechanism for there are some differences between VM migration and pre-copy in Vigrant. Some modifications were made to VM migration to fit our problem. We built a prototype using this, named plain pre-copy Vigrant. Using the existing pre-copy algorithm is not sufficient for Vigrant because 1) the scan speed should also limited for ensure the performance, 2) there may be many pages left to copy after the system has been running for a while, which may cause performance degradation. To solve these problems, we proposed a new algorithm (ARA) that can adaptively select the pages to be copy, with almost no extra complexity. We then tested the algorithm under some application memory usage patterns. We first get several applications' memory usage trace by modifying the Linux kernel. Then the memory usage traces are used to test the proposed ARA algorithm. The result shows under reasonable constraints, the proposed algorithm can improve the performance by over 20%.
title: Stenotus acaulis
title: Stemless mock goldenweed
titleType: AlternativeTitle
Creators: name: Dorn, Robert
name: Dorn, Jane
Publisher: name: University of Wyoming
Year: 2006
Subjects: Asteraceae
Stenotus
acaulis

description: Family: Asteraceae
description: Genus: Stenotus
description: Species: acaulis
Text Categorization using Association Rule and Naive Bayes Classifier
Creators: name: Kamruzzaman, S M
name: Rahman, Chowdhury Mofizur
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Retrieval (cs.IR)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: As the amount of online text increases, the demand for text categorization to aid the analysis and management of text is increasing. Text is cheap, but information, in the form of knowing what classes a text belongs to, is expensive. Automatic categorization of text can provide this information at low cost, but the classifiers themselves must be built with expensive human effort, or trained from texts which have themselves been manually classified. Text categorization using Association Rule and Naïve Bayes Classifier is proposed here. Instead of using words word relation i.e association rules from these words is used to derive feature set from pre-classified text documents. Naive Bayes Classifier is then used on derived features for final categorization.
description: 9 Pages, International Journal
Generation of truncated proteoforms in proteolytic networks : modeling and prediction in the protease web
Creators: name: Fortelny, Nikolaus
Publisher: name: University of British Columbia
Year: 2017

description: Primarily controlled by gene expression and fine-tuned by translation and degradation rates, protein activity is governed by a plethora of post-translation modifications such as phosphorylation and glycosylation, which generate a diversity of protein species and thereby control complex biological phenotypes. Protease processing by proteases is a particular modification leading to the irreversible generation of stable protein truncations. Well understood in examples such as signal- or propeptide removal, recent analyses consistently identify >50% of N-terminal peptides mapping inside the protein sequence as predicted by genomics, indicating an important regulatory role of proteases. All proteins undergo protease cleavage as part of processing or degradation, a second biological process controlled by proteases. Proteases are involved in numerous pathologies and commonly considered as drug targets. However, protease research and drug development is complicated, in part due to widespread crosstalk between proteases. Proteases regulate other proteases through direct cleavage or cleavage of protease inhibitors in a complex network of protease interactions, the protease web. Yet, a comprehensive analysis of the protease web has not been performed, hampering assignment of proteases to clear biological roles, their direct substrates, and protease inhibitor drug targeting. A second problem in the identification of protein processing is the potential confound between protein termini generated by protease processing, alternative splicing, and alternative translation. In this thesis, I computationally analyzed large and diverse datasets of protease interactions and protein truncations to gain insight into complex proteolytic processes and to guide biochemical follow- up experiments. Analyzing protease cleavage, alternative splicing and alternative translation data incorporated into our database TopFIND, I found that protease cleavage and alternative translation likely generate most protein truncations. Combining protease cleavage and inhibition data in a graph model of the protease web, I demonstrated extensive protease crosstalk and then predicted and validated a proteolytic pathway. Finally, investigating strategies for the prediction of protease inhibition, I predicted hundreds of protease-inhibitor interactions, and validated inhibition of kallikrein-5 by serpin B12. This work thus generated predictions for biochemical follow-up as well as important insights into the regulation of biological systems through proteases.
title: New Development on Graphene Contacted Single Molecular Junctions
Creators: name: Zhang, Q
Publisher: name: University of Liverpool Repository
Year: 2019

description: Molecular electronics holds great promise to realize the ultimate miniaturization of electronic devices and the investigation of charge transport properties through molecules tethered between pairs of electrode contacts is one of the most active areas of contemporary molecular electronics. To date, metallic materials have been widely used as the electrodes to construct molecular junctions, where desired characteristics are outstanding stability, conductivity, and fabricability. However, there is an increasing realization that new single molecule electrical junction functionality can be achieved through the use of non-metallic electrodes. Fundamental studies suggest that carbon based materials have the potential to be valuable alternative electrode materials for molecular electronics in the next generation of nanostructured devices. In light of the discussion above, we symmetrically investigate the possibility of constructing non-metallic molecular junctions and the corresponding charge transport properties through such junctions by replacing the common gold electrodes with graphene electrodes. We have measured the electrical conductance of a molecular junction based on alkanedithiol/alkanediamine chains sandwiched between a gold and a graphene electrode and compared the effects of anchoring groups in graphene based junctions. We also studied the technical effects of molecule-electrode contacts by comparing methods for capturing and measuring the electrical properties of single molecules in gold−graphene contact gaps. The decay obtained by STM based I(s) and CP-AFM BJ techniques, which is much lower than the one obtained for symmetric gold junctions, is related to the weak coupling at the molecule−graphene interface and the electronic structure of graphene. This asymmetric coupling induces higher conductance for alkanediamine chains than that in the same hybrid metal−graphene molecular junction using thiol anchoring groups. Moreover, we introduce an efficient data sorting algorithm and demonstrate its capacity on real experimental data sets. As a consequence, we suggest that novel 2D materials could sever as promising electrodes to construct nonsymmetric junctions and the use of appropriate anchoring groups/techniques may lead to a much lower decay constant and more conductive molecular junctions at longer lengths.
title: Penstemon grandiflorus
title: Large beardtongue
titleType: AlternativeTitle
Creators: name: Dorn, Robert
name: Dorn, Jane
Publisher: name: University of Wyoming
Year: 2006
Subjects: Scrophulariaceae
Penstemon
grandiflorus

description: Family: Scrophulariaceae
description: Genus: Penstemon
description: Species: grandiflorus
Integration einer dynamischen und zielorientierten Prozessunterstützung in eine kooperative Planungsumgebung
Creators: name: Both, Petra Von
Publisher: name: Karlsruhe
Year: 2002

description: Im Rahmen dieses Beitrages wird das Konzept eines auf die
Planungsmethodik der Integralen Planung aufbauenden
zielorientierten Modells zur Prozessunterstützung vorgestellt,
dessen Einbindung in ein entsprechendes Integriertes
Projektmodell, sowie die Umsetzung in einer
internetbasierten Groupwareumgebung. Als Grundlage der
Prozessunterstützung wird zudem das Konzept eines dynamischen
Zielsystems erläutert, das eine Integration der Zielentwicklung
und -anpassung in den Planungsprozess ermöglicht.
title: Balsamorhiza incana
title: Hoary balsamroot
titleType: AlternativeTitle
Creators: name: Dorn, Robert
name: Dorn, Jane
Publisher: name: University of Wyoming
Year: 2006
Subjects: Asteraceae
Balsamorhiza
incana

description: Family: Asteraceae
description: Genus: Balsamorhiza
description: Species: incana
Collimation of a Circulating Beam in the U_70 Synchrotron by Use of Reflections in Axially - Oriented Crystals
Creators: name: Afonin, A. G.
name: Baranov, V. T.
name: Bulgakov, M. K.
name: Voinov, I. S.
name: Gorlov, V. N.
name: Ivanova, I. V.
name: Krylov, D. M.
name: Lunn'kov, A. N.
name: Maisheev, V. A.
name: Reshetnikov, S. F.
name: Savin, D. A.
name: Syshchikov, E. A.
name: Terekhov, V. I.
name: Chesnokov, Yu. A.
name: Chirkov, P. N.
name: Yazynin, I. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: The possibilities of the extraction and collimation of a circulating beam by a new method due to the reflection of particles in crystals with axial orientation were experimentally investigated in the Fall-2010 run at the U_70 synchrotron. Such crystals have positive features, because the axial potential is five times larger than the planar potential. It has been shown that the collimation efficiency can reach 90% due to axial effects in the crystal. Losses of the circulating beam on a collimator have been reduced by several times; this makes it possible to suppress the muon jet near the steel collimator of the circulating beam.
description: 6 pages, 7 figures
Dark Energy density in Split SUSY models inspired by degenerate vacua
Creators: name: Froggatt, C.
name: Nevzorov, R.
name: Nielsen, H. B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is well known that global symmetries protect local supersymmetry and a zero value for the cosmological constant in no--scale supergravity. The breakdown of these symmetries, which ensure the vanishing of the vacuum energy density, results in a set of degenerate vacua with broken and unbroken supersymmetry leading to the natural realisation of the multiple point principle (MPP). Assuming the degeneracy of vacua with broken and unbroken SUSY in the hidden sector we estimate the value of the cosmological constant. We argue that the observed value of the dark energy density can be reproduced in the split-SUSY scenario if the SUSY breaking scale is of the order of 10^{10} GeV.
description: Parallel talk at ICHEP 2010, Paris, France, July 2010, 4 pages
Suche nach Anisotropie in der kosmischen Strahlung mit dem KASCADE Experiment
Creators: name: Maier, Gernot
Publisher: name: Karlsruhe
Year: 2004

description: Im Rahmen dieser Arbeit wurde die Richtungsverteilung der kosmischen Strahlung im Energiebereich von 0.3 bis 300 PeV auf verschiedenen Winkelskalen untersucht. Etwa 150 Mio. mit dem KASCADE Detektorfeld gemessene ausgedehnte Luftschauer gehen in diese Analyse ein. Zur Verminderung von Systematiken in der Richtungsrekonstruktion ist ein neues Verfahren in die Rekonstruktionsroutinen von KASCADE integriert worden. Bei diesem wurde für die Schauerfront keine feste geometrische Form angenommen und sowohl die Ankunftszeiten als auch die Teilchenzahlen pro Detektor verwendet.
Die Suche nach großräumiger Anisotropie, d.h. nach einer dipolartigen Verteilung der Richtungen der ausgedehnten Luftschauer mit zwei verschiedenen Methoden ergab keine Hinweise auf Abweichungen von der Isotropie. Obere Grenzen im Bereich von 10−3 bis 10−2 für die Amplituden der ersten Harmonischen konnten mit dem Rayleigh Formalismus bestimmt werden.
Eine Himmelsdurchmusterung im Deklinationsbereich von 15º< δ < 85º nach Punktquellen sowie eine genauere Untersuchung der Umgebung möglicher Quellkandidaten der kosmischen Strahlung (Supernovae, Pulsare, TeV- γ-Quellen,...) resultieren in oberen Flußgrenzen (90%) für Punktquellen von etwa 10−9−10−10 m−2 s−1 bei einer Energieschwelle von 350 TeV. Auch bei der Suche nach Korrelationen in den Ankunftsrichtungen kosmischer Teilchen mit Primärenergien oberhalb von 80 PeV konnte kein Hinweis auf Anisotropie gefunden werden.
Towards an IO intensive Grid application instrumentation in MedioGRID
Creators: name: Tudor, Dacian
name: Pop, Florin
name: Cristea, Valentin
name: Cretu, Vladimir
Publisher: name: arXiv
Year: 2011
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Obtaining high performance in IO intensive applications requires systems that support reliable fast transfer, data replication, and caching. In this paper we present an architecture designed for supporting IO intensive applications in MedioGRID, a system for real-time processing of satellite images, operating in a Grid environment. The solution ensures that applications which are processing geographical data have uniform access to data and is based on continuous monitoring of the data transfers using MonALISA and its extensions. The MedioGRID architecture is also built on Globus, Condor and PBS and based on this middleware we aim to extract information about the running systems. The results obtained in testing MedioGRID system for large data transfers show that monitoring system provides a very good view of system evolution.
title: Mertensia fusiformis
title: Oblongleaf bluebells
titleType: AlternativeTitle
Creators: name: Dorn, Robert
name: Dorn, Jane
Publisher: name: University of Wyoming
Year: 2006
Subjects: Boraginaceae
Mertensia
fusiformis

description: Family: Boraginaceae
description: Genus: Mertensia
description: Species: fusiformis
Algorithmic Solutions for Several Offline Constrained Resource Processing and Data Transfer Multicriteria Optimization Problems
Creators: name: Andreica, Mugurel Ionut
name: Tapus, Nicolae
Publisher: name: arXiv
Year: 2010
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences
subject: C.2; G.2
subject: 05A05, 05C05, 05C12, 05C38, 68M14, 68P05, 68P10, 90C39

description: In this paper we present novel algorithmic solutions for several resource processing and data transfer multicriteria optimization problems. The results of most of the presented techniques are strategies which solve the considered problems (almost) optimally. Thus, the developed algorithms construct intelligent strategies which can be implemented by agents in specific situations. All the described solutions make use of the properties of the considered problems and, thus, they are not applicable to a very general class of problems. However, by considering the specific details of each problem, we were able to obtain very efficient results.
A multidimensional Szemerédi's theorem in the primes
Creators: name: Titichetrakun, Tatchai
Publisher: name: University of British Columbia
Year: 2016

description: In this thesis, we investigate topics related to the Green-Tao theorem on arithmetic progression in primes in higher dimensions. Our main tool is the pseudorandom measure majorizing primes defined in [51] concentrated on almost primes. In chapter 2, we combine the sieve technique used in constructing pseudorandom measure (in this case, Goldston-Yildirim sum and almost primes) with the circle method of Birch to study the number of almost prime solutions of diophantine systems (with some rank conditions). Our rank condition is similar to the integer case, due to the heuristics that almost primes are pseudorandom. In chapter 3, we investigate the generalization of Green-Tao’s theorem to higher dimensions in the case of corner configuration. We apply the transference principle of Green-Tao (with hyperplane separation technique of Gowers) in this setting. This problem is also related to the densification trick in [16]. In chapter 4, we extend the result of Chapter 3 to obtain the full multi-dimensional analogue of the Green-Tao’s theorem, using hypergraph regularity method by directly proving a version of hypergraph removal lemma in the weighted hypergraphs. The method is to run an energy increment on a parametric weight systems of measures, rather than on a single measure space, to overcome the presence of intermediate weights. Contrary to [110], [68] where the authors investigate the problem using a measure supported on primes and infinite linear form conditions, relying on the Gowers Inverse Norms Conjecture.
Kolmogorov complexity, Lovasz local lemma and critical exponents
Creators: name: Rumyantsev, Andrey
Publisher: name: arXiv
Year: 2010
Subjects: subject: Combinatorics (math.CO)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: D. Krieger and J. Shallit have proved that every real number greater than 1 is a critical exponent of some sequence. We show how this result can be derived from some general statements about sequences whose subsequences have (almost) maximal Kolmogorov complexity. In this way one can also construct a sequence that has no "approximate" fractional powers with exponent that exceeds a given value.
Temps de discussion 2
Creators: name: Collectif IGP
Publisher: name: Collectif Inventer le Grand Paris
Year: 2018

description: Laurent Coudroy de Lille Le rapport que Paris entretient avec ses enceintes et ses bordures est assez paradoxal et très complexe; cela ne peut se limiter à observer l’extension urbaine. C’est aussi ce que fait Marcel Poëte en 1913appelle à considérer Paris à partir de ses marges,en reproduisant une série de représentations iconographiques où l’on voit les quartiers périphériques,mais ausis l’extérieur urbain. Il se pose exactement ces questions par l'image pourrait-on dire. la question que je voudrais poser est celle qui intéresse aussi Halbwachs à savoir si, à un moment donné, les pouvoirs qui sont présents dans cette ville  avant...
On the chromospheric activity of stars with planets
Creators: name: Martins, B. L. Canto
name: Chagas, M. L. das
name: Alves, S.
name: Leão, I. C.
name: Neto, L. P. de Souza
name: de Medeiros, J. R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context. Signatures of chromospheric activity enhancement have been found for a dozen stars, pointing to a possible star-planet interaction. Nevertheless in the coronal activity regime, there is no conclusive observational evidence for such an interaction. Does star-planet interaction manifest itself only for a few particular cases, without having a major effect on stars with planets in general? Aims. We aim to add additional observational constraints to support or reject the major effects of star-planet interactions in stellar activity, based on CaII chromospheric emission flux. Methods. We performed a statistical analysis of CaII emission flux of stars with planets, as well as a comparison between CaII and X-ray emission fluxes, searching for dependencies on planetary parameters. Results. In the present sample of stars with planets, there are no significant correlations between chromospheric activity indicator log(R'HK) and planetary parameters. Further, the distribution of the chromospheric activity indicator for stars without planets is not distinguishable from the one with planets.
description: 6 pages, 5 figures, submitted to A&A
Intelligent strategies for DAG scheduling optimization in Grid environments
Creators: name: Pop, Florin
name: Cristea, Valentin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: The paper presents a solution to the dynamic DAG scheduling problem in Grid environments. It presents a distributed, scalable, efficient and fault-tolerant algorithm for optimizing tasks assignment. The scheduler algorithm for tasks with dependencies uses a heuristic model to optimize the total cost of tasks execution. Also, a method based on genetic algorithms is proposed to optimize the procedure of resources assignment. The experiments used the MonALISA monitoring environment and its extensions. The results demonstrate very good behavior in comparison with other scheduling approaches for this kind of DAG scheduling algorithms.
description: Printech, ISBN 978-973-718-743-7
title: Essays in Quantitative Investments
Creators: name: Yang, Y
Publisher: name: University of Liverpool Repository
Year: 2018

description: This thesis studies the characteristics of Chinese futures markets and the quantitative investment strategies. The main objective of this thesis is to provide a comprehensive analysis on the performance of quantitative investment strategies in the Chinese market. Furthermore, with an econometric analysis, the stylised facts of the Chinese futures markets are documented. Extensive backtesting results on the performance of momentum, reversal and pairs trading type strategies are provided. In the case of pairs trading type strategies, risk and return relationship is characterised by the length of the maximum holding periods, and thus re ected in the maximum drawdown risk. In line with the increasing holding periods, the pro tability of pairs trading increases over longer holding periods. Therefore, the abnormal returns from pairs trading in the Chinese futures market do not necessarily re ect market ine ciency. Momentum and reversal strategies are compared by employing both high- and low-frequency time series with precise estimation of transaction costs. The comparison of momentum and reversal investment strategies at the intra- and inter-day scales displays that the portfolio rebalancing frequency signi cantly impacts the pro tability of such strategies. Complementarily, the excess returns of inter-day momentum trading with the inclusion of precise estimates of transaction costs re ect that quantitative investment strategies consistently produce abnormal pro ts in the Chinese commodity futures markets. However, from a risk-adjusted view, the returns are obtained only by bearing additional drawdown risks. Finally, this thesis suggests that investor should choose quantitative trading strategies according to the investment horizon, tolerance for maximum drawdown and portfolio rebalancing costs.
Self-consistent theory of intrinsic localized modes: application to monatomic chain
Creators: name: Hizhnyakov, V.
name: Shelkan, A.
name: Klopov, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Dynamical Systems (math.DS)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A theory of intrinsic localized modes (ILMs) in anharmonic lattices is developed, which allows one to reduce the original nonlinear problem to a linear problem of small variations of the mode. This enables us to apply the Lifshitz method of the perturbed phonon dynamics for the calculations of ILMs. In order to check the theory, the ILMs in monatomic chain are considered. A comparison of the results with the corresponding molecular dynamics calculations shows an excellent agreement.
description: 9 pages, 1 figure, 1 table
OpenPh - Numerical Physics Library
Creators: name: Milescu, George
name: Noaje, Gabriel
name: Pop, Florin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Digital Libraries (cs.DL)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Numerical physics has gained a lot of importance in the last decade, its efficiency being motivated and sustained by the growth of computational power. This paper presents a concept that is to be developed in the next few years: OpenPh. OpenPh is a numerical physics library that makes use of the advantages of both open source software and MATLAB programming. Its aim is to deliver the instruments for providing numerical and graphical solutions for various physics problems. It has a modular structure, allowing the user to add new modules to the existing ones and to create its own modules according to its needs, being virtually unlimited extendable. The modules of OpenPh are implemented using MATLAB engine because it is the best solution used in engineering and science, providing a wide range of optimized methods to accomplish even the toughest jobs. Current version of OpenPh includes two modules, the first one providing tools for quantum physics and the second one for mechanics. The quantum physics module deals with the photoelectric effect, the radioactive decay of carbon-11, and the Schrödinger equation - particle in a box. The classical mechanics module includes the study of the uniform circular motion, the forced damped harmonic oscillations and the vibration of a fixed-fixed string.
description: (ISSN 1223-7027)
title: Thelesperma caespitosum
title: Low greenthread
titleType: AlternativeTitle
Creators: name: Dorn, Robert
name: Dorn, Jane
Publisher: name: University of Wyoming
Year: 2006
Subjects: Asteraceae
Thelesperma
caespitosum

description: Family: Asteraceae
description: Genus: Thelesperma
description: Species: caespitosum
K-Theoretic Duality for Hyperbolic Dynamical Systems
Creators: name: Kaminker, Jerome
name: Putnam, Ian F.
name: Whittaker, Michael F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: K-Theory and Homology (math.KT)
subject: Dynamical Systems (math.DS)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L80, 37B10, 37D40, 46L80, 46L35

description: The K-theoretic analog of Spanier-Whitehead duality for noncommutative C*-algebras is shown to hold for the Ruelle algebras associated to irreducible Smale spaces. This had previously been proved only for shifts of finite type. Implications of this result as well as relations to the Baum-Connes conjecture and other topics are also considered.
description: 36 pages
Carbon K-shell Photo Ionization of CO: Molecular frame angular Distributions of normal and conjugate shakeup Satellites
Creators: name: Jahnke, T.
name: Titze, J.
name: Foucar, L.
name: Wallauer, R.
name: Osipov, T.
name: Benis, E. P.
name: Jagutzki, O.
name: Arnold, W.
name: Czasch, A.
name: Staudte, A.
name: Schöffler, M.
name: Alnaser, A.
name: Weber, T.
name: Prior, M. H.
name: Schmidt-Böcking, H.
name: Dörner, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We have measured the molecular frame angular distributions of photoelectrons emitted from the Carbon K shell of fixed-in-space CO molecules for the case of simultaneous excitation of the remaining molecular ion. Normal and conjugate shake up states are observed. Photo electrons belonging to normal Σ-satellite lines show an angular distribution resembling that observed for the main photoline at the same electron energy. Surprisingly a similar shape is found for conjugate shake up states with Π-symmetry. In our data we identify shake rather than electron scattering (PEVE) as the mechanism producing the conjugate lines. The angular distributions clearly show the presence of a Σ-shape resonance for all of the satellite lines.
description: 8 pages, 2 figures
Constitutive equations for granular flow with uniform mean shear and spin fields
Creators: name: Takechi, K.
name: Yoshida, K.
name: Arimitsu, T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Numerical simulations of two-dimensional granular flows under uniform shear and external body torque were performed in order to extract the constitutive equations for the system. The outcome of the numerical simulations is analyzed on the basis of the micropolar fluid model. Uniform mean shear field and mean spin field, which is not subordinate to the vorticity field, are realized in the simulations. The estimates of stresses based on kinetic theory by Lun [Lun, J. Fluid Mech., 1991, 233, 539] are in good agreement with the simulation results for a low area fraction $ν=0.1$ but the agreement becomes weaker as the area fraction gets higher. However, the estimates in the kinetic theory can be fitted to the simulation results up to $ν=0.7$ by renormalizing the coefficient of roughness. For a relatively dense granular flow ($ν=0.8$), the simulation results are also compared with Kanatani's theory [Kanatani, Int. J. Eng. Sci., 1979, 17, 419]. It is found that the dissipation function and its decomposition into the constitutive equations in Kanatani's theory are not consistent with the simulation results.
description: 22 pages, 10 figures
Neutrino initiated cascades at mid and high altitudes in the atmosphere
Creators: name: Supanitsky, A. D.
name: Medina-Tanco, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: High energy neutrinos play a very important role for the understanding of the origin and propagation of ultra high energy cosmic rays (UHECR). They can be produced as a consequence of the hadronic interactions suffered by the cosmic rays in the acceleration regions, as by products of the propagation of the UHECR in the radiation background and as a main product of the decay of super heavy relic particles. A new era of very large exposure space observatories, of which the JEM-EUSO mission is a prime example, is on the horizon which opens the possibility of neutrino detection in the highest energy region of the spectrum. In the present work we use a combination of the PYTHIA interaction code with the CONEX shower simulation package in order to produce fast one-dimensional simulations of neutrino initiated showers in air. We make a detail study of the structure of the corresponding longitudinal profiles, but focus our physical analysis mainly on the development of showers at mid and high altitudes, where they can be an interesting target for space fluorescence observatories.
description: To appear in Astroparticle Physics
Stress-induced traps in multilayered structures
Creators: name: Ciurea, Magdalena Lidia
name: Lazanu, Sorina
name: Stavarache, Ionel
name: Lepadatu, Ana-Maria
name: Iancu, Vladimir
name: Mitroi, Mihai Razvan
name: Nigmatullin, Raoul Rashid
name: Baleanu, Cristina Mihaela
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The trap parameters of defects in Si/CaF2 multilayered structures were determined from the analysis of optical charging spectroscopy measurements. Two kinds of maxima were observed. Some of them were rather broad, corresponding to "normal" traps, while the others, very sharp, were attributed to stress-induced traps. A procedure of optimal linear smoothing the noisy experimental data has been developed and applied. This procedure is based on finding the minimal value of the relative error with respect to the value of the smoothing window. In order to obtain a better accuracy for the description of the trapping-detrapping process, a Gaussian temperature dependence of the capture crosssections characterizing the stress-induced traps was introduced. Both the normal and the stress-induced traps have been characterized, including some previously considered as only noise features.
description: 37 pages, 9 figures
Molecular Dynamics at Low Time Resolution
Creators: name: Faccioli, Pietro
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The internal dynamics of macro-molecular systems is characterized by widely separated time scales, ranging from fraction of ps to ns. In ordinary molecular dynamics simulations, the elementary time step dt used to integrate the equation of motion needs to be chosen much smaller of the shortest time scale, in order not to cut-off important physical effects. We show that, in systems obeying the over-damped Langevin Eq., the fast molecular dynamics which occurs at time scales smaller than dt can be analytically integrated out and gives raise to a time-dependent correction to the diffusion coefficient, which we rigorously compute. The resulting effective Langevin equation describes by construction the same long-time dynamics, but has a lower time resolution power, hence it can be integrated using larger time steps dt. We illustrate and validate this method by studying the diffusion of a point-particle in a one-dimensional toy-model and the denaturation of a protein.
description: 12 pages, 5 figures
Physiology of extreme breath-holding
Creators: name: Bain, Anthony R.
Publisher: name: University of British Columbia
Year: 2016

description: The practice of competitive breath-hold (apnea) diving has provided a gateway for studying the physiologic limits of severe hypoxemia and hypercapnia beyond otherwise possible in healthy humans. In elite apnea competitors, the broad objectives of this Thesis were to, a) quantify the impact of peripheral and central chemoreception, and lung volume on the elite dry-land apnea breakpoint, and b) examine the consequences of prolonged apnea on the cerebral metabolic functioning. These objectives were achieved in four experimental studies. Study 1 explored the impact of peripheral chemoreflex silencing with low-dose dopamine. Here, compared to placebo, dopamine blunted the ventilatory response to hypercapnic-hypoxia by ~27%; however, maximal apnea duration was only increased by ~5%. At the breakpoint, arterial hypoxemia was identical with dopamine compared to placebo, indicating that the apnea termination may largely be determined by a threshold level of hypoxemia to maintain consciousness. To eliminate the influence of hypoxia, Study 2 assessed the main determinants of an apnea breakpoint following hyperoxic pre-breathing. Here, the apnea duration was related to the individual forced vital capacity, and unrelated to the central chemoreflex. Respiratory muscle fatigue and pending atelectasis likely determined the capacity of a maximal hyperoxic apnea. Study 3 quantified the cerebral metabolism during apnea. The cerebral metabolic rate of oxygen, measured from the product of cerebral blood flow and the radial artery-jugular venous oxygen content difference, was reduced by ~29% at the termination of apnea. However, there was no change in the cerebral non-oxidative metabolism, calculated from the ratio of oxygen and carbohydrate metabolism. Study 4 examined the cerebral metabolic response in three apneas eliciting separate levels of hypoxemia and hypercapnia. Apneas generating the most severe hypercapnia, irrespective of hypoxia, elicited the largest reduction in the cerebral metabolic rate of oxygen. Moreover, apneas generating the most severe hypoxia, irrespective of hypercapnia, caused a cerebral net release of lactate, suggesting astrocyte glycogenolysis. Together, the findings of this thesis provide new insight into the determinants of an extreme apnea breaking point, and the observations of hypercapnic-induced reduction in oxidative cerebral metabolism provides a tenable mechanism for cerebral protection against prolonged apnea.
title: Penstemon utahensis
title: Utah penstemon
titleType: AlternativeTitle
Creators: name: Dorn, Robert
name: Dorn, Jane
Publisher: name: University of Wyoming
Year: 2006
Subjects: Scrophulariaceae
Penstemon
utahensis

description: Family: Scrophulariaceae
description: Genus: Penstemon
description: Species: utahensis
title: Physaria acutifolia
title: Sharpleaf twinpod
titleType: AlternativeTitle
Creators: name: Dorn, Robert
name: Dorn, Jane
Publisher: name: University of Wyoming
Year: 2006
Subjects: Brassicaceae
Physaria
acutifolia

description: Family: Brassicaceae
description: Genus: Physaria
description: Species: acutifolia
Turbulence in collisionless plasmas: statistical analysis from numerical simulations with pressure anisotropy
Creators: name: Kowal, Grzegorz
name: Falceta-Goncalves, D. A.
name: Lazarian, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: In the past years we have experienced an increasing interest in understanding of the physical properties of collisionless plasmas, mostly because of the large number of astrophysical environments, e.g. the intracluster medium (ICM), containing magnetic fields which are strong enough to be coupled with the ionized gas and characterized by densities sufficiently low to prevent the pressure isotropization with respect to the magnetic line direction. Under these conditions a new class of kinetic instabilities arises, such as firehose and mirror ones, which were extensively studied in the literature. Their role in the turbulence evolution and cascade process in the presence of pressure anisotropy, however, is still unclear. In this work we present the first statistical analysis of turbulence in collisionless plasmas using three dimensional double isothermal magnetohydrodynamical with the Chew-Goldberger-Low closure (CGL-MHD) numerical simulations. We study models with different initial conditions to account for the firehose and mirror instabilities and to obtain different turbulent regimes. We study the probability distribution functions, spectra, structure functions and anisotropy of density and velocity fluctuations. The results indicate that in some cases the instabilities significantly modifies the statistical properties of turbulence and even though preliminary and restricted to very specific conditions, show that the physical properties of turbulence in collisionless plasmas, as those found in the ICM, may be very different from what has been largely believed. Implications can range from interchange of energies to cosmic rays acceleration.
description: 20 pages, 9 figures, 1 table
title: Helianthus nuttallii
title: Nuttall's sunflower
titleType: AlternativeTitle
Creators: name: Dorn, Robert
name: Dorn, Jane
Publisher: name: University of Wyoming
Year: 2006
Subjects: Asteraceae
Helianthus
nuttallii

description: Family: Asteraceae
description: Genus: Helianthus
description: Species: nuttallii
Entropy-Based Non-Local Means Filter for Single-Look SAR Speckle Reduction
Creators: name: Chan, Debora
name: Gambini, Juliana
name: Frery, Alejandro
Publisher: name: Open Access Victoria University of Wellington | Te Herenga Waka
Year: 2022
Subjects: subject: 90999 Geomatic Engineering not elsewhere classified
subject: FOS: Environmental engineering
subject: 20399 Classical Physics not elsewhere classified
subject: FOS: Physical sciences
subject: 40699 Physical Geography and Environmental Geoscience not elsewhere classified
subject: FOS: Earth and related environmental sciences

description: Speckle is an interference phenomenon that contaminates images captured by coherent illumination systems. Due to its multiplicative and non-Gaussian nature, it is challenging to eliminate. The non-local means approach to noise reduction has proven flexible and provided good results. We propose in this work a new non-local means filter for single-look speckled data using the Shannon and Rényi entropies under the G0 model. We obtain the necessary mathematical apparatus (the Fisher information matrix and asymptotic variance of maximum likelihood estimators). The similarity between samples of the patches relies on a parametric statistical test that verifies the evidence whether two samples have the same entropy or not. Then, we build the convolution mask by transforming the p-value into weights with a smooth activation function. The results are encouraging, as the filtered images have a better signal-to-noise ratio, they preserve the mean, and the edges are not severely blurred. The proposed algorithm is compared with three successful filters: SRAD (Speckle Reducing Anisotropic Diffusion), Lee, and FANS (Fast Adaptive Nonlocal SAR Despeckling), showing the new method’s competitiveness.
Clasificarea distribuita a mesajelor de e-mail
Creators: name: Pop, Florin
name: Petrescu, Diana
name: Trauşan-Matu, Ştefan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: A basic component in Internet applications is the electronic mail and its various implications. The paper proposes a mechanism for automatically classifying emails and create dynamic groups that belong to these messages. Proposed mechanisms will be based on natural language processing techniques and will be designed to facilitate human-machine interaction in this direction.
description: ISSN 1453-1305
How non-linear scaling relations unify dwarf and giant elliptical galaxies
Creators: name: Graham, Alister W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Dwarf elliptical galaxies are frequently excluded from bright galaxy samples because they do not follow the same linear relations in diagrams involving effective half light radii R_e or mean effective surface brightnesses _e. However, using two linear relations which unite dwarf and bright elliptical galaxies we explain how these lead to curved relations when one introduces either the half light radius or the associated surface brightness. In particular, the curved _e - R_e relation is derived here. This and other previously misunderstood curved relations, once heralded as evidence for a discontinuity between faint and bright elliptical galaxies at M_B ~ -18 mag, actually support the unification of such galaxies as a single population whose structure (i.e. stellar concentration) varies continuously with stellar luminosity and mass.
description: 4 pages including 2 figures, to appear in "A Universe of dwarf galaxies", Conf. Proc. (Lyon, June 14-18, 2010)
title: Phlox opalensis
title: Opal phlox
titleType: AlternativeTitle
Creators: name: Dorn, Robert
name: Dorn, Jane
Publisher: name: University of Wyoming
Year: 2006
Subjects: Polemoniaceae
Phlox
opalensis

description: Family: Polemoniaceae
description: Genus: Phlox
description: Species: opalensis
Optical characterization of topological insulator surface states: Berry curvature-dependent response
Creators: name: Hosur, Pavan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study theoretically the optical response of the surface states of a topological insulator, especially the generation of helicity-dependent direct current by circularly polarized light. Interestingly, the dominant current, due to an interband transition, is controlled by the Berry curvature of the surface bands. This extends the connection between photocurrents and Berry curvature beyond the quasiclassical approximation where it has been shown to hold. Explicit expressions are derived for the (111) surface of the topological insulator Bi_{2}Se_{3} where we find significant helicity dependent photocurrents when the rotational symmetry of the surface is broken by an in-plane magnetic field or a strain. Moreover, the dominant current grows linearly with time until a scattering occurs, which provides a means for determining the scattering time. The dc spin generated on the surface is also dominated by a linear-in-time, Berry curvature dependent contribution.
description: 7 pages, 1 figure
title: Ephedra viridis
title: Mormon tea
titleType: AlternativeTitle
Creators: name: Dorn, Robert
name: Dorn, Jane
Publisher: name: University of Wyoming
Year: 2006
Subjects: Ephedraceae
Ephedra
viridis

description: Family: Ephedraceae
description: Genus: Ephedra
description: Species: viridis
title: The promotion of contemporary art in Italy: an institutional perspective
Creators: name: Labor, Alice
Publisher: name: IMT Alti Studi Lucca
Year: 2020

description: The aim of the research is to trace a critical history of the organization and tools of the Ministry of Cultural Heritage for the promotion of contemporary art between its establishment in 1974 and today. The study of the ministerial support to the contemporary in Italy opens up a series of crucial dilemmas that do not solely concern the administration of contemporary art, but have a more wide-reaching impact regarding the whole administration of cultural heritage. The research is based on the study of the archival documents related to ministerial activities and policies towards contemporary art, coming from the archives of the Directorate General for Budget and the Directorate General Contemporary Creativity of the Ministry of Cultural Heritage, the Galleria Nazionale d’Arte Moderna e Contemporanea, the Quadriennale, the Triennale and the Biennale. The documents include ministerial acts, decrees, publics calls, circular letters, internal and external communications between the Ministry and its institutions. The research is complemented, through a multidisciplinary approach, with the analysis of the specific regulations and parliamentary debates surrounding the ministerial organisation and promotion of contemporary art. Several reforms followed multiple changes of government, leading to fluctuating expansions and retractions of the ministerial competences for the contemporary. After reconstructing the history of the ministerial organization and tools for the promotion of contemporary art and artists in Italy, the research defines their possible future evolutions.
การสร้างสรรค์จิตรกรรมเทคนิคผสมจิากแนวคิดและสัญลักษณ์ในวิถีชีวิตชนบทอีสาน
Creators: name: ศักดิ์สิทธิ์ บัวคำ
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2563
Subjects: จิตรกรรมเทคนิคผสม
แนวคิด
สัญลักษณ์
วิถีชีวิตอีสาน

description: วารสารมหาวิทยาลัยศิลปากร, 40, 6, 1.-15