cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sapromyza quadripunctata
Creators: name: Kameneva, E. P.
name: Korneyev, V. A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Lauxaniidae
Sapromyza
Sapromyza quadripunctata

description: Cephalia quadripunctata Gimmerthal, 1842
Valid name. Sapromyza quadripunctata (Gimmerthal, 1842): Hendel, 1914: 22; Hennig, 1939: 68 (Lauxaniidae).
Cephalia quadripunctata Gimmerthal, 1843: 684.
Myrmecomya quadripunctata: Becker, 1905: 102.
Material. Holotype ♀; not located; possibly LNNHM; not examined.
Original description: “Thoracae griseo, abdomine testacea, punctis quatuor; pedibus testaceae.
Kopf, Fühler und Mundtheile rothgelb; Augen mit einer feinen weissen Linie umzogen. Mittelleib aschgrau. Schildchen und Hinterleib rostgelb, auf dem 3ten und 4ten Leibringe je zwei kleine erhabene schwarze Puncte oder Wärzchen. Beine rostgelb, Schenkel aussen grau schillernd. Flügel etwas gelblich getrübt, besonders am Vorderrande. Stark 2"' Ein ♀ ”.
[English translation: (from Latin) Thorax grey, abdomen reddish yellow, four dots, legs reddish yellow]
(From German) Head, antennae and mouthparts reddish yellow; eyes outlined with a fine white line. Thorax ash grey. Scutellum and abdomen rusty yellow, on the 3rd and 4th abdominal segments two small raised black spots or tubercles. Legs rusty yellow, legs iridescent gray on the outside. Wings somewhat yellowish clouded, especially at the anterior margin. Size 2 lines [4.23 mm]. One ♀].
description: Published as part of Kameneva, E. P. & Korneyev, V. A., 2022, Identity Of Species Assigned To The Genus Cephalia (Diptera, Tephritoidea), pp. 447-462 in Zoodiversity 56 (6) on pages 456-457, DOI: 10.15407/zoo2022.06.447, http://zenodo.org/record/10831280
Flame Spread Through Wooden Dowels
Creators: name: Zhao, Zhao
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: Engineering

description: In practical applications, flammable materials are often arranged in arrays of discrete objects whose combustion properties may be different as that of a homogeneous material. In this study, the influence of spacing between arrays of wooden dowels on the rate of upward flame spread through arrays has been studied. This configuration in some ways modelled physics that similar with flame spread through wildland fuels and cable trays. A single dowel was ignited at the base of an array of birch dowels with fixed spacings of 0.75, 0.875, 1.0 and 1.5 cm and allowed to spread upwards. Flame spread along the center columns, burning duration times and horizontal flame spread were plotted and compared with previous theory (Gollner et al., 2012 and Vogel and Williams, 1970). As a result of experimental results, it was shown that flame spread rates will decrease after a critical spacing is reached, most likely due to limited availability of oxygen. Experiments on horizontally-propagating flames through dowel arrays were performed to further show this effect.
Quantum state evolution in an environment of cosmological perturbations
Creators: name: Haba, Z.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the pure and thermal states of quantized scalar and tensor perturbations in various epochs of Universe evolution. We calculate the density matrix of non-relativistic particles in an environment of these perturbations. We show that particle's motion can be described by a stochastic equation with a noise coming from the cosmological environment. We investigate the squeezing of Gaussian wave packets in different epochs and its impact upon the noise of quantized cosmological perturbations.
description: 34 pages
Distinction between sequential and direct three-body decays
Creators: name: Alvarez-Rodriguez, R.
name: Fynbo, H. O. U.
name: Jensen, A. S.
name: Garrido, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We discuss the three-body decay mechanisms of many-body resonances. Sequential decays proceed via two-body configurations after emission of the third particle. In direct decay all three particles leave simultaneously their interaction regions. The intermediate paths within the interaction regions are not observables and only accessible through models. The momentum distributions carry, apart from polarization, all possible information about decay modes and resonance structure. In this context we discuss detailed results for the decay of the $^{9}$Be($5/2^-$) resonance.
description: 4 pages, 4 figures. Accepted for publication in Physical Review Letters
Development of a Turbulent Wolfhard-Parker Burner with Suppressing Co-flow
Creators: name: Link, Eric
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: Engineering
subject: burner
subject: co-flow
subject: fire
subject: flame height
subject: suppression

description: A burner and surrounding co-flow air system were developed for experimental study of flame suppression in a diluted oxygen environment. Development of the burner was guided by design criteria requiring the flame to be a turbulent buoyant diffusion flame in a line configuration presenting a realistic challenge to suppression methods such as oxidizer-stream dilution. Design constraints included buoyancy, turbulence, and flame height criteria. Oxygen concentration and temperature measurements, along with a smoke wire flow visualization technique were utilized to evaluate the system and ensure the design criteria were successfully met. Additional analysis was performed on image recordings of the flame to provide a robust and repeatable flame height measurement to evaluate the flame height constraint. Ultimately, an experimental apparatus with the ability to suppress a flame in a controlled, well-characterized environment was developed to provide a good base for model validation measurements.
The Age of Westerlund 1 Revisited
Creators: name: Beasor, Emma R.
name: Davies, Ben
name: Smith, Nathan
name: Gehrz, Robert D.
name: Figer, Donald F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The cluster Westerlund~1 (Wd1) is host to a large variety of post main-sequence (MS) massive stars. The simultaneous presence of these stars can only be explained by stellar models if the cluster has a finely-tuned age of 4-5Myr, with several published studies independently claiming ages within this range. At this age, stellar models predict that the cool supergiants (CSGs) should have luminosities of $\log(L/L_\odot) \approx 5.5$, close to the empirical luminosity limit. Here, we test that prediction using archival data and new photometry from SOFIA to estimate bolometric luminosities for the CSGs. We find that these stars are on average 0.4dex too faint to be 5Myr old, regardless of which stellar evolution model is used, and instead are indicative of a much older age of $10.4^{+1.3}_{-1.2}$Myr. We argue that neither systematic uncertainties in the extinction law nor stellar variability can explain this discrepancy. In reviewing various independent age estimates of Wd1 in the literature, we firstly show that those based on stellar diversity are unreliable. Secondly, we re-analyse Wd1's pre-MS stars employing the Damineli extinction law, finding an age of $7.2^{+1.1}_{-2.3}$Myr; older than that of previous studies, but which is vulnerable to systematic errors that could push the age close to 10Myr. However, there remains significant tension between the CSG age and that inferred from the eclipsing binary W13. We conclude that stellar evolution models cannot explain Wd1 under the single age paradigm. Instead, we propose that the stars in the Wd1 region formed over a period of several Myr.
description: Accepted for publication in ApJ. 15 pages, 9 figures
Operation of a Stark decelerator with optimum acceptance
Creators: name: Scharfenberg, Ludwig
name: Haak, Henrik
name: Meijer, Gerard
name: van de Meerakker, Sebastiaan Y. T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: With a Stark decelerator, beams of neutral polar molecules can be accelerated, guided at a constant velocity, or decelerated. The effectiveness of this process is determined by the 6D volume in phase space from which molecules are accepted by the Stark decelerator. Couplings between the longitudinal and transverse motion of the molecules in the decelerator can reduce this acceptance. These couplings are nearly absent when the decelerator operates such that only every third electric field stage is used for deceleration, while extra transverse focusing is provided by the intermediate stages. For many applications, the acceptance of a Stark decelerator in this so-called $s=3$ mode significantly exceeds that of a decelerator in the conventionally used ($s=1$) mode. This has been experimentally verified by passing a beam of OH radicals through a 2.6 meter long Stark decelerator. The experiments are in quantitative agreement with the results of trajectory calculations, and can qualitatively be explained with a simple model for the 6D acceptance. These results imply that the 6D acceptance of a Stark decelerator in the $s=3$ mode of operation approaches the optimum value, i.e. the value that is obtained when any couplings are neglected.
description: 13 pages, 11 figures
A mouse model for Sorsby fundus dystrophy
Creators: name: Weber, Bernhard H. F.
name: Lin, B.
name: White, K.
name: Kohler, K.
name: Soboleva, G.
name: Herterich, S.
name: Seeliger, M. W.
name: Jaissle, G. B.
name: Grimm, C.
name: Reme, C.
name: Wenzel, A.
name: Asan, E.
name: Schrewe, H.
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: 610 Medizin

description: purpose. Sorsby fundus dystrophy (SFD) is a rare, late-onset macular dystrophy caused by mutations in the tissue inhibitor of metalloproteinases-3 (TIMP3) gene. The known mutations introduce potentially unpaired cysteine residues in the C terminus of the protein and result in the formation of higher-molecular-weight protein complexes of as yet unknown composition and functional consequences in the pathologic course of SFD. To facilitate in vivo investigation of mutant TIMP3, the authors generated a knock-in mouse carrying a disease-related Ser156Cys mutation in the orthologous murine Timp3 gene. methods. Site-directed mutagenesis and homologous recombination in embryonic stem (ES) cells was used to generate mutant ES cells carrying the Timp3 S156C allele. Chimeric animals were obtained, of which two displayed germline transmission of the mutated allele. Molecular genetic, biochemical, electron microscopic, and electrodiagnostic techniques were used for characterization. results. At 8 months of age, knock-in mice showed abnormalities in the inner aspect of Bruch’s membrane and in the organization of the adjacent basal microvilli of the retinal pigment epithelium (RPE). Changes resembling those in the mutant animals were also present to some extent in normal littermates, but only at an advanced age of 30 months. Long-term electrodiagnostic recordings indicated normal retinal function throughout life. The biochemical characteristics of the mutant protein appear similar in humans and knock-in mice, suggesting common molecular pathways in the two species. The localization of the mutant protein in the eye is normal, although there is evidence of increased Timp3 levels in Bruch’s membrane of mutant animals. conclusions. The knock-in mice display early features of age-related changes in Bruch’s membrane and the RPE that may represent the primary clinical manifestations of SFD. In addition, our immunolabeling studies and biochemical data support a model proposing that site-specific excess rather than absence or deficiency of functional Timp3 may be the primary consequence of the known Timp3 mutations.
Entanglement instability in the interaction of two qubits with a common non-Markovian environment
Creators: name: Mouloudakis, G.
name: Lambropoulos, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work we study the steady state entanglement between two qubits interacting asymetrically with a common non-Markovian environment. Depending on the initial two-qubit state, the asymmetry in the couplings between each qubit and the non-Markovian environment may lead to enhanced entanglement in the steady state of the system, measured in terms of the two-qubit concurrence. Our results indicate that, if a qubit-qubit interaction is also present, the two-qubit steady state concurrence is always favored by the symmetric or anti-symmetric coupling configuration. Although finite, the steady concurrence is predicted to be highly unstable in this regime as long as the interaction between the two qubits is larger than the couplings between each qubit and the non-Markovian reservoir.
description: 8 pages, 6 figures
The multiwavelength properties of red QSOs -- Evidence for dusty winds as the origin of QSO reddening
Creators: name: Rivera, G. Calistro
name: Alexander, D. M.
name: Rosario, D. J.
name: Harrison, C. M.
name: Stalevski, M.
name: Rakshit, S.
name: Fawcett, V. A.
name: Morabito, L. K.
name: Klindt, L.
name: Best, P. N.
name: Bonato, M.
name: Bowler, R. A. A.
name: Costa, T.
name: Kondapally, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Fundamental differences in the radio properties of red quasars (QSOs), as compared to blue QSOs, have been recently discovered, positioning them as a potential key population in the evolution of galaxies and black holes across cosmic time. To elucidate their nature, we exploited a rich compilation of photometry and spectroscopic data to model their spectral energy distributions (SEDs) from the UV to the FIR and characterise their emission-line properties. Following a systematic comparison approach, we infer the AGN accretion, obscuration, and host galaxy properties in a sample of ~1800 QSOs at 0.21000 km/s) in red QSOs. We find that red QSOs that exhibit evidence for high-velocity winds present a stronger signature of the infrared excess, suggesting a causal connection between reddening and the presence of hot dust in QSO winds. We propose that dusty winds at nuclear scales are potentially the physical ingredient responsible for the colours in red QSOs, as well as a key parameter for the regulation of accretion material in the nucleus.
description: Accepted for publication in Astronomy & Astrophysics. 22 pages, 16 figures. Abstract abridged
title: \(\textit {Pre-performance routines}\) von professionellen Tennisspieler*innen im Vorfeld der Aufschlagbewegung
Creators: name: Brune, Charlotte
Publisher: name: Ruhr-Universität Bochum
Year: 2024
Subjects: subject: 796 Sport

description: Die Kandidatin widmet die vorgelegte Abschlussthesis dem Aufschlag im Tennis. Da der Aufschlag in allen Rückschlagsportarten als einer der wichtigsten Schläge angesehen wird, ist es bedeutend, die Spieleröffnung konstant mit guter Qualität abzurufen. Um bei sich zu bleiben und zur Selbstvergewisserung werden im Spitzentennis pre-performance routines beobachtet.
Das Ziel dieser Arbeit ist die Beantwortung der Forschungsfrage: Welche wiederkehrenden Elemente sind in den pre-performance routines im Vorfeld der Aufschlagbewegung von professionellen Tennisspieler*innen erkennbar? Auch aus Eigenmotivation aufgrund der sportlichen Vita der Kandidatin sollen so Rückschlüsse für den Amateurbereich gezogen werden.
Die Beantwortung der Forschungsfrage erfolgt mithilfe einer systematischen Videoanalyse, bei welcher sowohl männliche als auch weibliche Tennisspieler*innen im Rahmen von Turnieren mit 500 bzw. 1000 Ranglistenpunkten beobachtet wurden. Die Auswertung der Beobachtungen ergab, dass zwar verschiedene Arten von Elementen bei allen Spieler*innen beobachtet werden konnten, diese individuell aber relativ konstant abgerufen werden und so zur Vorbereitung des Aufschlags unbestritten beitragen.
description: Studentische Qualifikationsarbeiten an der Fakultät für Sportwissenschaft der RUB, 29
Josephson physics mediated by the Mott insulating phase
Creators: name: Vishveshwara, Smitha
name: Lannert, Courtney
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We investigate the static and dynamic properties of bosonic lattice systems in which condensed and Mott insulating phases co-exist due to the presence of a spatially-varying potential. We formulate a description of these inhomogeneous systems and calculate the bulk energy at and near equilibrium. We derive the explicit form of the Josephson coupling between disjoint superfluid regions separated by Mott insulating regions. We obtain detailed estimates for the experimentally-realized case of alternating superfluid and Mott insulating spherical shells in a radially symmetric parabolically-confined cold atom system.
description: 4 pages, 1 figure
Long-time behavior of stochastically perturbed neuronal networks
Creators: name: Bonaccorsi, Stefano
name: Mugnolo, Delio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 34B45; 47D07; 60H15; 37L40

description: Our investigation is specially motivated by the stochastic version of a common model of potential spread in a dendritic tree. We do not assume the noise in the junction points to be Markovian. In fact, we allow for long-range dependence in time of the stochastic perturbation. This leads to an abstract formulation in terms of a stochastic diffusion with dynamic boundary conditions, featuring fractional Brownian motion. We prove results on existence, uniqueness and asymptotics of weak and strong solutions to such a stochastic differential equation.
First Order Calculation of the Inclusive Cross Section pp to ZZ by Graviton Exchange in Large Extra Dimensions
Creators: name: Kober, Martin
name: Koch, Benjamin
name: Bleicher, Marcus
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the inclusive cross section of double Z-boson production within large extra dimensions at the Large Hadron Collider (LHC). Using perturbatively quantized gravity in the ADD model we perform a first order calculation of the graviton mediated contribution to the pp to ZZ cross section. At low energies (e.g. Tevatron) this additional contribution is very small, making it virtually unobservable, for a fundamental mass scale above 2500 GeV. At LHC energies however, the calculation indicates that the ZZ-production rate within the ADD model should differ significantly from the Standard Model if the new fundamental mass scale would be below 15000 GeV. A comparison with the observed production rate at the LHC might therefore provide direct hints on the number and structure of the extra dimensions.
description: 7 pages, 7 figures, accepted for publication in Phys. Rev. D
Statistical Learning Under Adversarial Distribution Shift
Creators: name: Dan, Chen
Publisher: name: Carnegie Mellon University
Year: 2022
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences

description: One of the most fundamental assumptions in statistical machine learning is that training and testing data should be sampled independently from the same distribution. However, modern real world applications require that the learning algorithm should perform robustly even when this assumption is no longer valid. Specifically, the training and testing distributions may shift slightly (yet adversarially) within a small neighborhood of each other. This formulation encompasses many new challenges in machine learning, including adversarial examples, outlier contaminated data, group fairness and label imbalance. In this thesis, we seek to understand the statistical optimality and provide better algorithms under the aforementioned adversarial distribution shift. Our contributions include (1) the first near optimal minimax lower bound for the sample complexity of adversarially robust classification in a Gaussian setting. (2) introducing the framework of distributional and outlier robust optimization, which allowed us to apply distributionally robust optimization to large scale experiments with deep neural networks and outperformed existing methods in sub-population shift tasks. (3) margin sensitive group risk, a principled way of improving distributional robust generalization via group-asymmetric margin maximization.
Conformal Bootstrap with Reinforcement Learning
Creators: name: Kántor, Gergely
name: Niarchos, Vasilis
name: Papageorgakis, Constantinos
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce the use of reinforcement-learning (RL) techniques to the conformal-bootstrap programme. We demonstrate that suitable soft Actor-Critic RL algorithms can perform efficient, relatively cheap high-dimensional searches in the space of scaling dimensions and OPE-squared coefficients that produce sensible results for tens of CFT data from a single crossing equation. In this paper we test this approach in well-known 2D CFTs, with particular focus on the Ising and tri-critical Ising models and the free compactified boson CFT. We present results of as high as 36-dimensional searches, whose sole input is the expected number of operators per spin in a truncation of the conformal-block decomposition of the crossing equations. Our study of 2D CFTs uses only the global $so(2,2)$ part of the conformal algebra, and our methods are equally applicable to higher-dimensional CFTs. When combined with other, already available, numerical and analytical methods, we expect our approach to yield an exciting new window into the non-perturbative structure of arbitrary (unitary or non-unitary) CFTs.
description: 54 pages; v2: typos corrected and references added; v3: minor corrections
A note on vacuum energy from the de Sitter spectrum
Creators: name: Ropotenko, K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is shown that a well-known relation between entropy of a system and its energy spectrum being applied to the early universe determines the present vacuum energy and the time scale on which this energy can manifest itself. Given the present vacuum energy, the relation imposes a constraint on the initial inflationary state.
description: 3 pages, no figures; journal version: new title and minor corrections added; journal-ref added
The Efficiency of Gravitational Bremsstrahlung Production in the Collision of Two Schwarzschild Black Holes
Creators: name: Aranha, R. F.
name: de Oliveira, H. P.
name: Soares, I. Damião
name: Tonini, E. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We examine the efficiency of gravitational bremsstrahlung production in the process of head-on collision of two boosted Schwarzschild black holes. We constructed initial data for the characteristic initial value problem in Robinson-Trautman spacetimes, that represent two instantaneously stationary Schwarzschild black holes in motion towards each other with the same velocity. The Robinson-Trautman equation was integrated for these initial data using a numerical code based on the Galerkin method. The final resulting configuration is a boosted black hole with Bondi mass greater than the sum of the individual mass of each initial black hole. Two relevant aspects of the process are presented. The first relates the efficiency $Δ$ of the energy extraction by gravitational wave emission to the mass of the final black hole. This relation is fitted by a distribution function of non-extensive thermostatistics with entropic parameter $q \simeq 1/2$; the result extends and validates analysis based on the linearized theory of gravitational wave emission. The second is a typical bremsstrahlung angular pattern in the early period of emission at the wave zone, a consequence of the deceleration of the black holes as they coalesce; this pattern evolves to a quadrupole form for later times.
description: 16 pages, 4 figures, to appear in Int. J. Modern Phys. D (2008)
Solitons in lattice field theories via tight-binding supersymmetry
Creators: name: Balasubramanian, Shankar
name: Patoary, Abu
name: Galitski, Victor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Reflectionless potentials play an important role in constructing exact solutions to classical dynamical systems, non-perturbative solutions of various large-N field theories, and closely related solitonic solutions to the Bogoliubov-de Gennes equations in the theory of superconductivity. These solutions rely on the inverse scattering method, which reduces these seemingly unrelated problems to identifying reflectionless potentials of an auxiliary one-dimensional quantum scattering problem. There are several ways of constructing these potentials, one of which is quantum mechanical supersymmetry (SUSY). In this paper, motivated by recent experimental platforms, we generalize this framework to develop a theory of solitons in lattice versions of interacting field theories. Our analysis hinges on the use of trace identities, which are relations connecting the potential of an equation of motion to the scattering data. For a discrete Schrödinger operator, such trace identities are well known, and we derive a new set of identities for the discrete Dirac operator. We then use these in a lattice Gross-Neveu and chiral Gross-Neveu (Nambu-Jona-Lasinio) model to show that lattice solitons correspond to reflectionless potentials associated with the discrete scattering problem. These models are of significance as they are equivalent to a mean-field theory of a lattice superconductor. To explicitly construct these solitons, we generalize supersymmetric quantum mechanics to tight-binding models. We show that a matrix transformation exists that maps a tight-binding model to an isospectral one which shares the same structure and scattering properties. The corresponding soliton solutions have both modulated hopping and onsite potential; we explicitly compute both topological and non-topological soliton solutions as well as bound state spectra in the aforementioned models.
description: 42 pages, 4 figures
A duality theory for Banach spaces with the Convex Point-of-Continuity Property
Creators: name: Hare, David Edwin George
Publisher: name: University of British Columbia
Year: 2010

description: A norm ||⋅|| on a Banach space X is Fréchet differentiable at x ∈ X if there is a functional ∫∈ X* such that [Formula Omitted] This concept reflects the smoothness characteristics of X. A dual Banach space X* has the Radon-Nikodym Property (RNP) if whenever C ⊂ X* is weak*-compact and convex, and ∈ > 0, there is an x ∈ X and an ⍺ > 0 such that diameter [Formula Omitted] this property reflects the convexity characteristics of X*. Culminating several years of work by many researchers, the following theorem established a strong connection between the smoothness of X and the convexity of X*: Every equivalent norm on X is Fréchet differentiable on a dense set if and only if X* has the RNP. A more general measure of convexity has been recently receiving a great deal of attention: A dual Banach space X* has the weak* Convex Point-of-Continuity Property (C*PCP) if whenever ɸ ≠ C ⊂ X* is weak*-compact and convex, and ∈ > 0, there is a weak*-open set V such that V ⋂ C ≠ ɸ and diam V ⋂ C < ∈. In this thesis, we develop the corresponding smoothness properties of X which are dual to C*PCP. For this, a new type of differentiability, called cofinite Fréchet differentiability, is introduced, and we establish the following theorem: Every equivalent norm on X is cofinitely Fréchet differentiable everywhere if and only if X* has the C*PCP. Representing joint work with R. Deville, G. Godefroy and V. Zizler, an alternate approach is developed in the case when X is separable. We show that if X is separable, then every equivalent norm on X which has a strictly convex dual is Fréchet differentiable on a dense set if and only if X* has the C*PCP, if and only if every equivalent norm on X which is Gâteaux differentiable (everywhere) is Fréchet differentiable on a dense set. This result is used to show that if X* does not have the C*PCP, then there is a subspace Y of X such that neither Y* nor (X/Y)* have the C*PCP, yet both Y and X/Y have finite dimensional Schauder decompositions. The corresponding result for spaces X* failing the RNP remains open.
Testing for change points in time series models and limiting theorems for NED sequences
Creators: name: Ling, Shiqing
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62F05, 62M10 (Primary); 60G10 (Secondary)

description: This paper first establishes a strong law of large numbers and a strong invariance principle for forward and backward sums of near-epoch dependent sequences. Using these limiting theorems, we develop a general asymptotic theory on the Wald test for change points in a general class of time series models under the no change-point hypothesis. As an application, we verify our assumptions for the long-memory fractional ARIMA model.
description: Published at http://dx.doi.org/10.1214/009053606000001514 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Universality of Uhrig dynamical decoupling for suppressing qubit pure dephasing and relaxation
Creators: name: Yang, Wen
name: Liu, Ren-Bao
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The optimal $N$-pulse dynamical decoupling discovered by Uhrig for a spin-boson mmodel [Phys. Rev. Lett, {\bf 98}, 100504 (2007)] is proved to be universal in suppressing to $O(T^{N+1})$ the pure dephasing or the longitudinal relaxation of a qubit (or spin-1/2) coupled to a generic bath in a short-time evolution of duration $T$. It is also found that for the purpose of suppressing the longitudinal relaxation, an ideal Uhrig $π$-pulse sequence can be generalized to a sequence consisting of the ideal one superimposed with finite-duration pulses satisfying certain symmetry requirements.
description: 4 pages, 1 figures
On generation of Crab giant pulses
Creators: name: Lyutikov, Maxim
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose that Crab giant pulses are generated on closed magnetic field lines near the light cylinder via anomalous cyclotron resonance on the ordinary mode. Waves are generated in a set of fine, unequally spaced, narrow emission bands at frequencies much lower than a local cyclotron frequency. Location of emission bands is fitted to spectral structures seen by Eilek et al. (2006). To reproduce the data, the required density of plasma in the giant pulses emission region is much higher, by a factor $\sim 3 \times 10^5$, than the minimal Goldreich-Julian density. Emission is generated by a population of highly energetic particles with radiation-limited Lorentz factors $γ\sim 7 \times 10^7$, produced during occasional reconnection close to the Y point, where the last closed field lines approach the light cylinder.
description: accepted by MNRAS; added estimate of simultaneous GLAST signal
A mathematical theory of elastic orthotropic plates in plane strain and axi-symmetric deformations
Creators: name: Lin, Yi Han
Publisher: name: University of British Columbia
Year: 2010

description: We present an elastic orthotropic plate theory in plane strain and axisym-metric deformations by first developing their uniform asymptotic expansions of the exact solutions for the basic governing boundary value problems. Then, the establishment of the necessary conditions for decaying states, both explicitly and asymptotically, enables us to determine the outer solution without reference to the inner solution and clarify the precise meaning of the well known St.Venant's principle under the circumstances considered here. The possible existence of corner stress singularities was examined by establishing and solving three transcendental governing equations. By developing a generalized Cauchy type singular integral equation for the plane strain deformation and an integral equation of the second kind for the axi-symmetric deformation and taking the corner stress singularities into consideration, we obtained accurate numerical solutions for all canonical boundary value problems which are needed in the asymptotic necessary conditions for decaying states. Finally, the accuracy of the numerical solutions of canonical boundary value problems and the efficiency of the plate theory were confirmed through the applications of solving two physical problems and comparing with the existing results.
An identity for sums of polylogarithm functions
Creators: name: Miller, Steven J
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11M26

description: We derive an identity for certain linear combinations of polylogarithm functions with negative exponents, which implies relations for linear combinations of Eulerian numbers. The coefficients of our linear combinations are related to expanding moments of Satake parameters of holomorphic cuspidal newforms in terms of the moments of the corresponding Fourier coefficients, which has applications in analyzing lower order terms in the behavior of zeros of L-functions near the central point.
description: 9 pages
Observation of the 'head-tail' effect in nuclear recoils of low-energy neutrons
Creators: name: Dujmic, D.
name: Tomita, H.
name: Lewandowska, M.
name: Ahlen, S.
name: Fisher, P.
name: Henderson, S.
name: Kaboth, A.
name: Kohse, G.
name: Lanza, R.
name: Monroe, J.
name: Roccaro, A.
name: Sciolla, G.
name: Skvorodnev, N.
name: Vanderspek, R.
name: Wellenstein, H.
name: Yamamoto, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Directional detection of dark matter can provide unambiguous observation of dark matter interactions even in the presence of background. This article presents an experimental method to measure the direction tag ("head-tail") of the dark matter wind by detecting the scintillation light created by the elastic nuclear recoils in the scattering of dark matter particles with the detector material. The technique is demonstrated by tagging the direction of the nuclear recoils created in the scattering of low-energy neutrons with CF4 in a low-pressure time-projection chamber that is developed by the DMTPC collaboration. The measurement of the decreasing ionization rate along the recoil trajectory provides the direction tag of the incoming neutrons, and proves that the "head-tail" effect can be observed.
description: 14 pages, 8 figures, submitted to Nucl.Instr.Meth
Classical approach to the graph isomorphism problem using quantum walks
Creators: name: Douglas, B. L.
name: Wang, J. B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Given the extensive application of classical random walks to classical algorithms in a variety of fields, their quantum analogue in quantum walks is expected to provide a fruitful source of quantum algorithms. So far, however, such algorithms have been scarce. In this work, we enumerate some important differences between quantum and classical walks, leading to their markedly different properties. We show that for many practical purposes, the implementation of quantum walks can be efficiently achieved using a classical computer. We then develop both classical and quantum graph isomorphism algorithms based on discrete-time quantum walks. We show that they are effective in identifying isomorphism classes of large databases of graphs, in particular groups of strongly regular graphs. We consider this approach to represent a promising candidate for an efficient solution to the graph isomorphism problem, and believe that similar methods employing quantum walks, or derivatives of these walks, may prove beneficial in constructing other algorithms for a variety of purposes.
Eliminating on the Divergences of the Photon Self - Energy Diagram in (2+1) Dimensional Quantum Electrodynamics
Creators: name: Han, Nguyen Suan
name: Xuan, Nguyen Nhu
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The divergence of the photon self - energy diagram in spinor quantum electrodynamics in $(2+1)$ dimensional space time- $(QED_3)$ is studied by the Pauli - Villars regularization and dimensional regularization. Results obtained by two different methods are coincided if the gauge invariant of theory is considered carefully step by step in these calculations.
description: 6 pages, 1 figure
บทวิจารณ์หนังสือ : วิชาสุดท้าย [ที่มหาวิทยาลัยไม่ได้สอน]
Creators: name: รินธรรม อโศกตระกูล
Publisher: name: ศูนย์คุณธรรม (องค์การมหาชน)
Year: 2012
Subjects: สุนทรพจน์,การเรียนรู้แบบประสบการณ์,การประกอบอาชีพ,การดำเนินชีวิต,หนังสือ--วิจารณ์

description: 1, 1, วารสารวิชาการคุณธรรมความดี
The digital footprint of innovators: Using email to detect the most creative people in your organization
Creators: name: Gloor, P. A.
name: Colladon, A. Fronzetti
name: Grippa, F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: H.4.3; J.4

description: We propose a novel method for finding the most innovative people in an organization, using email to analyze structure and dynamics of the organization's online communication. To illustrate our approach, we analyzed the email archive of 2000 members of the R&D department of a US multinational company. We use metrics of social network analysis extended with meta-data of interaction dynamics to calculate features for individual employees: their network positions, messages sent and received, pings to others and response times. We find a distinction between innovation group leaders and subject matter experts focused on publishing papers and patents. Innovation administrators have a higher number of direct contacts, are more committed in conversations and receive more messages than they send. We also found significant differences between innovators oriented towards internal awards and innovators more concerned with external recognition of their work.
การศึกษาเพื่อเสริมสร้างความซื่อตรงในสังคมไทย
Creators: name: ถวิลวดี บุรีกุล
name: สุธิกา แสงเพชร
name: ปัทมา สูบกำบัง
name: ทวิติยา สินธุกงศ์
name: อริศรา คำตัน
Publisher: name: ศูนย์คุณธรรม (องค์การมหาชน)
Year: 2013
Subjects: ความซื่อตรง,การเสริมสร้างความซื่อตรง,ตัวชี้วัด,ยุทธศาสตร์,สังคมไทย

description: 1, 2, วารสารวิชาการคุณธรรมความดี
Truly multi-dimensional all-speed schemes for the Euler equations on Cartesian grids
Creators: name: Barsukow, Wasilij
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M08, 76N15, 35B40, 35Q31

description: Finite volume schemes often have difficulties to resolve the low Mach number (incompressible) limit of the Euler equations. Incompressibility is only non-trivial in multiple spatial dimensions. Low Mach fixes, however generally are applied to the one-dimensional method and the method is then used in a dimensionally split way. This often reduces its stability. Here, it is suggested to keep the one-dimensional method as it is, and only to extend it to multiple dimensions in a particular, all-speed way. This strategy is found to lead to much more stable numerical methods. Apart from the conceptually pleasing property of modifying the scheme only when it becomes necessary, the multi-dimensional all-speed extension also does not include any free parameters or arbitrary functions, which generally are difficult to choose, or might be problem dependent. The strategy is exemplified on a Lagrange Projection method and on a relaxation solver.
Searching for a Pulsar in SN1987A
Creators: name: Manchester, R. N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: SN 1987A offered a unique opportunity to detect a pulsar at the very beginning of its life and to study its early evolution. Despite many searches at radio and optical wavelengths, no pulsar has yet been detected. Details of a recent search using the Parkes radio telescope are given. Limits on the X-ray, optical and radio luminosity of a point source at the centre of SN 1987A place limits on the properties of a central neutron star. However, neither these nor the pulsar limits preclude the presence of a relatively slowly rotating neutron star (P >~ 100 ms) with a moderate surface dipole magnetic field in SN 1987A. Galactic studies suggest that a significant fraction of pulsars are born with parameters in this range. In view of this, continued searches for a pulsar in SN 1987A are certainly justified.
description: 10 pages, 3 figures. To appear in "Supernova 1987A: Twenty Years After: Supernovae and Gamma-Ray Bursters", edited by S. Immler, K. W. Weiler and R. McCray, American Institute of Physics, New York, 2007, in press
Limitation of TCA Cycle Intermediates Represents an Oxygen-Independent Nutritional Antibacterial Effector Mechanism of Macrophages
Creators: name: Hayek, I.
name: Fischer, F.
name: Schulze-Luehrmann, J.
name: Dettmer, Katja
name: Sobotta, K.
name: Schatz, V.
name: Kohl, L.
name: Boden, K.
name: Lang, R.
name: Oefner, Peter J.
name: Wirtz, S.
name: Jantsch, Jonathan
name: Luhrmann, A.
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: 610 Medizin

description: In hypoxic and inflamed tissues, oxygen (O2)-dependent antimicrobial defenses are impaired due to a shortage of O2. To gain insight into the mechanisms that control bacterial infection under hypoxic conditions, we infected macrophages with the obligate intracellular pathogen Coxiella burnetii, the causative agent of Q fever. Our experiments revealed that hypoxia impeded C. burnetii replication in a hypoxia-inducible factor (HIF) 1α-dependent manner. Mechanistically, under hypoxia, HIF1α impaired the activity of STAT3, which in turn reduced the intracellular level of TCA cycle intermediates, including citrate, and impeded C. burnetii replication in macrophages. However, bacterial viability was maintained, allowing the persistence of C. burnetii, which is a prerequisite for the development of chronic Q fever. This knowledge will open future research avenues on the pathogenesis of chronic Q fever. In addition, the regulation of TCA cycle metabolites by HIF1α represents a previously unappreciated mechanism of host defense against intracellular pathogens.
Hypoxia regulates TRAIL sensitivity of colorectal cancer cells through mitochondrial autophagy
Creators: name: Ehrenschwender, Martin
name: Knoll, Gertrud
name: Bittner, Sebastian
name: Kurz, Maria
name: Jantsch, Jonathan
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: ENDOPLASMIC-RETICULUM; INHIBITS APOPTOSIS; MEDIATED APOPTOSIS; CALCIUM-RELEASE; XIAP; NECROSIS; ACTIVATION; PROTEINS; BAX; MODULATION; TRAIL; SMAC mimetic; death receptor; hypoxia
subject: 570 Biowissenschaften, Biologie

description: The capacity of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) to selectively induce cell death in malignant cells triggered numerous attempts for therapeutic exploitation. In clinical trials, however, TRAIL did not live up to the expectations, as tumors exhibit high rates of TRAIL resistance in vivo. Response to anti-cancer therapy is determined not only by cancer cell intrinsic factors (e.g. oncogenic mutations), but also modulated by extrinsic factors such as the hypoxic tumor microenvironment. Here, we address the effect of hypoxia on pro-apoptotic TRAIL signaling in colorectal cancer cells. We show that oxygen levels modulate susceptibility to TRAIL-induced cell death, which is severely impaired under hypoxia (0.5% O-2). Mechanistically, this is attributable to hypoxia-induced mitochondrial autophagy. Loss of mitochondria under hypoxia restricts the availability of mitochondria-derived pro-apoptotic molecules such as second mitochondria-derived activator of caspase ( SMAC), thereby disrupting amplification of the apoptotic signal emanating from the TRAIL death receptors and efficiently blocking cell death in type-II cells. Moreover, we identify strategies to overcome TRAIL resistance in low oxygen environments. Counteracting hypoxia-induced loss of endogenous SMAC by exogenous substitution of SMAC mimetics fully restores TRAIL sensitivity in colorectal cancer cells. Alternatively, enforcing a mitochondria-independent type-I mode of cell death by targeting the type-II phenotype gatekeeper X-linked inhibitor of apoptosis protein ( XIAP) is equally effective. Together, our results indicate that tumor hypoxia impairs TRAIL efficacy but this limitation can be overcome by combining TRAIL with SMAC mimetics or XIAPtargeting drugs. Our findings may help to exploit the potential of TRAIL in cancer therapy.
Polynomial selections and separation by polynomials
Creators: name: Wasowicz, Szymon
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 26A51, 26E25, 39B72, 54C65 (Primary); 26D07, 52A35 (Secondary)

description: Necessary and sufficient conditions under which two real functions defined on the real interval can be separated by a polynomial are given. An immediate consequence of the main result is the existence of the polynomial separation of convex functions of higher order. Another application is some Hyers-Ulam-stability-type result.