cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Contact projective structures and chains
Creators: name: Cap, Andreas
name: Zadnik, Vojtech
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53A20, 53B10, 53B15, 53C15, 53D10

description: Contact projective structures have been profoundly studied by D.J.F. Fox. He associated to a contact projective structure a canonical projective structure on the same manifold. We interpret Fox' construction in terms of the equivalent parabolic (Cartan) geometries, showing that it is an analog of Fefferman's construction of a conformal structure associated to a CR structure. We show that, on the level of Cartan connections, this Fefferman--type construction is compatible with normality if and only if the initial structure has vanishing contact torsion. This leads to a geometric description of the paths that have to be added to the contact geodesics of a contact projective structure in order to obtain the subordinate projective structure. They are exactly the chains associated to the contact projective structure, which are analogs of the Chern-Moser chains in CR geometry. Finally, we analyze the consequences for the geometry of chains and prove that a chain-preserving contactomorphism must be a morphism of contact projective structures.
description: AMSLaTeX, 16 pages
Emzirmek Zorunlu Mudur?
Creators: name: Hayta, Berna
name: Demir, Fatma Gül
name: Ayşe Nur Denizyol
name: Şenbağ, Melike
Publisher: name: Zenodo
Year: 2019

description: Medipol Üniversitesi Ebelik Bölümü Öğrencilerinin Emzirme Hakkında Bilgi Düzeylerinin Ölçülmesi
On the studies of space : in physics and metaphysics
Creators: name: Lim, AKJ
Publisher: name: University Of Tasmania
Year: 2023

description: In this essay, I will discuss and analyse the nature of space from both historical and modern perspectives, as well as from physics and metaphysics perspectives. The argument about the nature of space is usually regarded as the debate between two doctrines, substantivalism and relationalism. Substantivalism is a doctrine positing space, as an independent existence. Whereas, relationalism is a doctrine regarding space as relational and to say that space as an independent existence is redundant and superfluous, as relationalists argue that one can still get to various prominent theories without referring to substantial space. Hence, relationalism is a preferable background in doing physics. To resolve the problem between substantivalists and relationalists, one needs to look at what substantial space, or space as an independent existence, really means. Then, I argue that, either from historical or modern physics, some theories, if not many, still have a sort of substantial space lurking under these theories, even though it is not explicitly implied. Additionally, I argue that, from a metaphysical standpoint, it is impossible to conceive without space. In other words, space is a necessary condition for conceivability. So, if we can conceive, there must be a space. This essay is divided into five chapters and some sections. In the first chapter, the historical expositions of the nature of space will be articulated. Two leading figures, Issacs Newton and Gottfried Wilhelm Leibniz, will be discussed to help with the articulation of the nature of space. In the second chapter, the modern picture of the argument between substantivalists and relationalists will be introduced. Additionally, I will briefly talk about some geometry. To help the overall argument, some studies of geometry is necessary. In chapter three, with all the geometry knowledge in chapter two, we will be able to see how relationalists can reformulate a substantivalists' theory, Newton's mechanics, into a relationalists' theory. In chapter four, I will be focusing on the essence of the argument between substantivalism and relationalism. That is I will be looking at what exactly they are at odds. Once we have a clearer picture regarding their disagreement, I will argue for substantivalism in chapter five. In chapter five, I will conclude that the notion of space is indispensable.
Phase diagram and structural properties of a simple model for one-patch particles
Creators: name: Giacometti, Achille
name: Lado, Fred
name: Largo, Julio
name: Pastore, Giorgio
name: Sciortino, Francesco
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the thermodynamic and structural properties of a simple, one-patch fluid model using the reference hypernetted-chain (RHNC) integral equation and specialized Monte Carlo simulations. In this model, the interacting particles are hard spheres, each of which carries a single identical, arbitrarily-oriented, attractive circular patch on its surface; two spheres attract via a simple square-well potential only if the two patches on the spheres face each other within a specific angular range dictated by the size of the patch. For a ratio of attractive to repulsive surface of 0.8, we construct the RHNC fluid-fluid separation curve and compare with that obtained by Gibbs ensemble and grand canonical Monte Carlo simulations. We find that RHNC provides a quick and highly reliable estimate for the position of the fluid-fluid critical line. In addition, it gives a detailed (though approximate) description of all structural properties and their dependence on patch size.
description: 27 pages, 10 figures, J. Chem. Phys. in press
DOPPIAMENTE DISCRIMINATE: LE DONNE CON DISABILIT�
Creators: name: CARNOVALI, SARA
Publisher: name: Universit� degli Studi di Milano
Year: 2018

description: Il presente lavoro intende investigare le discriminazioni multiple di cui sono vittime le donne con disabilit�, in conseguenza dell?intersezione tra fattore ?genere? e fattore ?disabilit�?. Pi� nello specifico, il contributo cerca di porre in luce i profili di maggiore rilievo costituzionale nella garanzia dei diritti fondamentali delle donne con disabilit� che afferiscono al ?corpo?, indagando le tematiche della violenza, della sessualit� e dei diritti riproduttivi delle donne con disabilit�. Tali ambiti appaiono infatti quelli in cui le discriminazioni vissute da queste donne risultano particolarmente pervasive, nonch� quelli meno esplorati dalla dottrina giuridica, che possono pertanto offrire nuovi o diversi campi di indagine in merito alle discriminazioni multiple.
Raman Scattered HeII 6545 in the Young and Compact Planetary Nebula NGC 6790
Creators: name: Kang, Eun-Ha
name: Lee, Hee-Won
name: Lee, Byeong-Cheol
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the high resolution spectra of the youn and compact planerary nebula NGC 6790 obtained with the echelle spectrograph at Bohyunsan Optical Astronomy Observatory and report the discovery of Raman scattered He II 6545 in this object. This line feature is formed in a thick neutral region surrounding the hot central star, where He II 1025 line photons are scattered inelastically by hydrogen atoms. A Monte Carlo technique is adopted to compute the line profile with a simple geometric model, in which the neutral region is in the form of a cylindrical shell that is expanding from the central star. From our line profile analysis, the expansion velocity of the HI region lies in the range V_exp = 15- 19 Km/s. Less stringent constraints are put on the HI column density N_HI and covering factor C, where the total flux of Raman He II 6545 is consistent with the product of N_HI and C being CN_HI ~ 0.5 X 10^20 cm^-2. The Monte Carlo profiles from stationary emission models exhibit deficit in the wing parts. A much better fit is obtained when the He II emission region is assumed to take the form of a ring that slowly rotates with a rotation speed ~ 18Km/s. Brief discussions are presented regarding the mass loss processes and future observations.
The effect of theories of intelligence on immediate and delayed JOLs
Creators: name: Gleeson, LG
Publisher: name: University Of Tasmania
Year: 2023

description: This study investigated the effect of individual's theory of intelligence (TOI) on resolution between judgements of learning (JOLs) and recall. JOLs are predictions of future memory and can differ due to TOIs being more fixed (entity) or malleable (incremental). Fifty-eight participants (39 females; mean age 24 years) viewed Indonesian-English word pairs providing immediate and delayed JOLs before final recall. Dwecks (1999) Theories of Intelligence Scale ‚Äö-Self form for Adults assessed participants TOI. The results did not support the hypotheses that resolution for immediate JOLs would be better for entity than incremental theorists, and this difference would be smaller for delayed JOLs. Consistent with the delayed JOL effect resolution was found to be higher when JOLs were delayed (p<.001). A difficulty x TOI interaction was identified whereby resolution for incremental theorists was highest for moderate and difficult word pairs, while for entity theorists resolution was best for easy pairs (p=.023). It was concluded that resolution did not differ between entity and incremental theorists for immediate and delayed JOLs, suggesting there is no inaccuracy in JOLs for incremental theorists. Delayed JOLs, however, were more accurate overall. Further research is necessary to identify if these JOLs affect study behaviour in more ecological settings.
Optimal Simulation of a Perfect Entangler
Creators: name: Yu, Nengkun
name: Duan, Runyao
name: Ying, Mingsheng
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A $2\otimes 2$ unitary operation is called a perfect entangler if it can generate a maximally entangled state from some unentangled input. We study the following question: How many runs of a given two-qubit entangling unitary operation is required to simulate some perfect entangler with one-qubit unitary operations as free resources? We completely solve this problem by presenting an analytical formula for the optimal number of runs of the entangling operation. Our result reveals an entanglement strength of two-qubit unitary operations.
description: 4 pages, Comments are welcomed;v2 : more discussions with previous related works, main results unchanged, submitted to PRA
An Efficient Inter Carrier Interference Cancellation Schemes for OFDM Systems
Creators: name: Kumar, B. Sathish
name: Kumar, K. R. Shankar
name: Radhakrishnan, R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: Orthogonal Frequency Division Multiplexing (OFDM) has recently been used widely in wireless communication systems. OFDM is very effective in combating intersymbol interference and can achieve high data rate in frequency selective channel. For OFDM communication systems, the frequency offsets in mobile radio channels distort the orthogonality between subcarriers resulting in Inter Carrier Interference (ICI). ICI causes power leakage among subcarriers thus degrading the system performance. A wellknown problem of OFDM is its sensitivity to frequency offset between the transmitted and received carrier frequencies. There are two deleterious effects caused by frequency offset one is the reduction of signal amplitude in the output of the filters matched to each of the carriers and the second is introduction of ICI from the other carriers. This research work investigates three effective methods for combating the effects of ICI: ICI Self Cancellation (SC), Maximum Likelihood (ML) estimation, and Extended Kalman Filter (EKF) method. These three methods are compared in terms of bit error rate performance and bandwidth efficiency. Through simulations, it is shown that the three techniques are effective in mitigating the modulation schemes, the ML and EKF methods perform better than the SC method.
description: 8 pages IEEE format, International Journal of Computer Science and Information Security, IJCSIS December 2009, ISSN 1947 5500, http://sites.google.com/site/ijcsis/
Plans for PANDA Online Computing
Creators: name: Lange, Jens Soeren
name: Jin, Dapeng
name: Kirschner, Daniel
name: Kopp, Andreas
name: Kuehn, Wolfgang
name: Lang, Johannes
name: Li, Lu
name: Liu, Ming
name: Liu, ZhenAn
name: Muenchow, David
name: Perez, Tiago
name: Roskoss, Johannes
name: Wang, Qiang
name: Xu, Hao
name: Yang, Shuo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The PANDA experiment will not use any hardware trigger, i.e. all raw data are streaming in the data acquisition with a bandwidth of ~280 GB/s. The PANDA Online System is designed to perform data reduction by a factor of ~800 by reconstruction algorithms programmed in VHDL (Very High Speed Integrated Circuit Hardware Description Language) on FPGAs (Field Programmable Gate Arrays).
description: presented at Workshop on Fast Cerenkov Detectors, May 11-13, 2009, Giessen, Germany, 9 pages, 3 figures, accepted for publication in JINST
The sound damping constant for generalized theories of gravity
Creators: name: Brustein, Ram
name: Medved, A. J. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The near-horizon metric for a black brane in Anti-de Sitter (AdS) space and the metric near the AdS boundary both exhibit hydrodynamic behavior. We demonstrate the equivalence of this pair of hydrodynamic systems for the sound mode of a conformal theory. This is first established for Einstein's gravity, but we then show how the sound damping constant will be modified, from its Einstein form, for a generalized theory. The modified damping constant is expressible as the ratio of a pair of gravitational couplings that are indicative of the sound-channel class of gravitons. This ratio of couplings differs from both that of the shear diffusion coefficient and the shear viscosity to entropy ratio. Our analysis is mostly limited to conformal theories but suggestions are made as to how this restriction might eventually be lifted.
description: 24 pages
Investigating the relationship between sleep quality and intrusive memories in post-traumatic stress disorder
Creators: name: Ney, LJ
Publisher: name: University Of Tasmania
Year: 2023

description: The Sleep to Forget, Sleep to Remember model (Walker, 2009) suggests that sleep quality influences emotional memory consolidation. This model has relevance to intrusive memories in PTSD, since theories of PTSD posit that intrusive memories are a product of inadequate processing of emotional memories (Brewin, Dalgleish, & Joseph, 1996; Ehlers & Clark, 2000). The present study aims to investigate the moderating effect of sleep on the relationship between PTSD and intrusive memories. 34 PTSD, 44 trauma exposed (TE) and 40 non-trauma exposed (NTE) participants completed an emotional memory task, where they viewed 60 images (20 positive, 20 negative and 20 neutral) and, two days later, reported how many intrusive memories they had of each valence category. Participants also completed three measures of sleep quality: the Pittsburgh Sleep Quality Index, the REM Behaviour Disorder Screening Questionnaire and total hours slept before the second session. The PTSD group reported poorer sleep quality than control groups on all three measures, and significantly more negative intrusive memories than the NTE group. Moderation analyses revealed that hours of sleep before the second session moderated the relationship between PTSD symptomology and intrusive memories, as predicted by Sleep to Forget, Sleep to Remember (Walker, 2009).
title: Clinical case : Still's disease and Verneuil's disease : fortuitous association ?
title: Maladie de still et maladie de verneuil : association fortuite ?
Creators: name: Tazi, Sarah
Publisher: name: Revue Marocaine de Rhumatologie (RMR)
Year: 2024
Subjects: Hydradénite supurée, maladie de still, anti interleukine 1e.

description: L’hidradénite suppurée (HS) ou maladie de Verneuil, est une affection chronique inflammatoire et suppurante se développant sur les territoires cutanés comportant des glandes sudoripares apocrines. La physiopathologie de la maladie n’est pas bien connue mais le tabagisme et l’obésité constituent des facteurs prédisposant. C’est une maladie qui altère significativement la qualité de vie du fait de son retentissement physique, psychologique et son association à d’autres affections. Nous rapportons un cas de maladie de verneuil survenue chez un patient suivi pour maladie de still dont l’association semble n'avoir jamais été rapporté dans la littérature.
description: L’hidradénite suppurée (HS) ou maladie de Verneuil, est une affection chronique inflammatoire et suppurante se développant sur les territoires cutanés comportant des glandes sudoripares apocrines. La physiopathologie de la maladie n’est pas bien connue mais le tabagisme et l’obésité constituent des facteurs prédisposant. C’est une maladie qui altère significativement la qualité de vie du fait de son retentissement physique, psychologique et son association à d’autres affections. Nous rapportons un cas de maladie de verneuil survenue chez un patient suivi pour maladie de still dont l’association semble n'avoir jamais été rapporté dans la littérature.
Hadron Spectroscopy at CLEO
Creators: name: Tomaradze, Amiran
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: New measurements of the masses and decay branching fractions of charmonium and bottomonium states using the data collected by the CLEO detector are presented. These include CLEO identification of the singlet states eta_c'(2S), hc(1P), and eta_b(1S). Comparison with other experimental measurements and theoretical models is also presented.
description: 8 pages, 6 figures, Plenary talk presented at XIII International Conference on Hadron Spectroscopy, Hadron09, Nov. 29 - Dec. 4, Tallahassee, Florida, USA
Star Formation Around Super-Massive Black Holes
Creators: name: Bonnell, I. A.
name: Rice, W. K. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The presence of young massive stars orbiting on eccentric rings within a few tenths of a parsec of the supermassive black hole in the Galactic centre is challenging for theories of star formation. The high tidal shear from the black hole should tear apart the molecular clouds that form stars elsewhere in the Galaxy, while transporting the stars to the Galactic centre also appears unlikely during their stellar lifetimes. We present numerical simulations of the infall of a giant molecular cloud that interacts with the black hole. The transfer of energy during closest approach allows part of the cloud to become bound to the black hole, forming an eccentric disc that quickly fragments to form stars. Compressional heating due to the black hole raises the temperature of the gas to 100-1000K, ensuring that the fragmentation produces relatively high stellar masses. These stars retain the eccentricity of the disc and, for a sufficiently massive initial cloud, produce an extremely top-heavy distribution of stellar masses. This potentially repetitive process can therefore explain the presence of multiple eccentric rings of young stars in the presence of a supermassive black hole.
description: 20 pages includingh 7 figures. "This is the author's version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science, 321, (22 August 2008), doi:10.1126/science.1160653". Reprints and animations can be found at http://star-www.st-and.ac.uk/~iab1/
Simulation from endpoint-conditioned, continuous-time Markov chains on a finite state space, with applications to molecular evolution
Creators: name: Hobolth, Asger
name: Stone, Eric A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Analyses of serially-sampled data often begin with the assumption that the observations represent discrete samples from a latent continuous-time stochastic process. The continuous-time Markov chain (CTMC) is one such generative model whose popularity extends to a variety of disciplines ranging from computational finance to human genetics and genomics. A common theme among these diverse applications is the need to simulate sample paths of a CTMC conditional on realized data that is discretely observed. Here we present a general solution to this sampling problem when the CTMC is defined on a discrete and finite state space. Specifically, we consider the generation of sample paths, including intermediate states and times of transition, from a CTMC whose beginning and ending states are known across a time interval of length $T$. We first unify the literature through a discussion of the three predominant approaches: (1) modified rejection sampling, (2) direct sampling, and (3) uniformization. We then give analytical results for the complexity and efficiency of each method in terms of the instantaneous transition rate matrix $Q$ of the CTMC, its beginning and ending states, and the length of sampling time $T$. In doing so, we show that no method dominates the others across all model specifications, and we give explicit proof of which method prevails for any given $Q,T,$ and endpoints. Finally, we introduce and compare three applications of CTMCs to demonstrate the pitfalls of choosing an inefficient sampler.
description: Published in at http://dx.doi.org/10.1214/09-AOAS247 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
High Precision HalfWave Rectifier Circuit In Dual Phase Output Mode
Creators: name: Jamjaem, Theerayut
name: Burapattanasiri, Bancha
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: This paper present high precision halfwave rectifier circuit in dual phase output mode by 0.5 micrometer CMOS technology, plus or minus 1.5 V low voltage, it has received input signal and sent output current signal, respond in high frequency. The main structure compound with CMOS inverter circuit, common source circuit, and current mirror circuit. Simulation and confirmation quality of working by PSpice program, then it able to operating at maximum frequency about 100 MHz, maximum input current range about 400 μAp p, high precision output signal, low power dissipation, and uses a little transistor.
description: 4 pages IEEE format, International Journal of Computer Science and Information Security, IJCSIS December 2009, ISSN 1947 5500, http://sites.google.com/site/ijcsis/
Gamma rays from star-forming regions
Creators: name: Romero, Gustavo E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Star-forming regions have been tentatively associated with gamma-ray sources since the early days of the COS B satellite. After the Compton Gamma-Ray Observatory, the statistical evidence for such an association has became overwhelming. Recent results from Cherenkov telescopes indicate that some high-energy sources are produced in regions of active star formation like Cygnus OB2 and Westerlund 2. In this paper I will briefly review what kind of stellar objects can produce gamma-ray emission in star-forming regions and I will suggest that the formation process of massive stars could in principle result in the production of observable gamma rays.
description: 7 pages, 8 figures (in low resolution version). Invited talk at the "Fourth Heidelberg International Symposium on High Energy Gamma-Ray Astronomy 2008"
Evaluation of the effect of momentum on interaction forces in a linked system
Creators: name: Olson, Dieter
Publisher: name: Loughborough University
Year: 2024

description: Engineering of Sport 15 - Proceedings from the 15th International Conference on the Engineering of Sport (ISEA 2024)
Newton’s first law describes the behavior of an object if no external forces were to act on it and in so doing provides a baseline for understanding the forces applied. In a linked system, a similar counterfactual analysis can show the behavior if supplied joint torques were not present at a given kinematic state. This type of analysis can provide insight into the nature of the system and how the forces seen are affected by its current momentum state. The golfer – club system represents a linked system consisting of multiple joints and segments. At each of these joints a torque can be applied by the golfer to drive the club throughout its movement. The interaction force developed between segments depend on both the torques applied at each joint and the kinematic state of the system and the momentum it contains. A forward dynamics model is used as a basis for evaluating the behavior of the system when applied torques at joints are “turned off” in stepwise fashion across a representative number of time points. Output from these runs were compiled creating a representation of the contribution of momentum to joint interaction forces at each point in time. This analysis separates the contribution of “what has already been done” (forces created through interaction of momentum) from “what is currently being done” (forces created by applied joint torques) to generate the total force observed at the joints in a linked system. This is similar to the effect of initial conditions on the solution of differential equations.
title: Google Shopping and the Quest for a Legal Test for Self-preferencing Under Article 102 TFEU
Creators: name: Deutscher, Elias
Publisher: name: European Papers (www.europeanpapers.eu)
Year: 2022
Subjects: subject: self-preferencing
subject: case T-612/17 Google Shopping
subject: Article 102 TFEU
subject: Case C-7/97 Bronner v Mediaprint
subject: unequal treatment
subject: refusal to deal

description: European Papers - A Journal on Law and Integration, 2021 6(3), 1345-1361
description: European Forum Insight of 22 February 2022
description: I. Introduction. - II. Self-preferencing as a free-standing abuse of dominance. - III. A legal test unfound. - III.1. The leveraging theory of harm. - III.2. Unequal treatment and the "no economic sense test". - IV. The route not taken. - IV.1. Applying the MEO test to self-preferencing. - IV.2. The merits of the MEO test. - V. Conclusion.
description: Does a dominant firm abuse its market power in violation of EU competition law and, more specifically, art. 102 TFEU if it accords more favourable treatment to its own products or services than to those of its rivals? In answering this question in the affirmative and holding that self-preferencing constitutes a novel type of abuse of dominance, the European Commission's Google Shopping decision (case AT.39740) expanded the scope of art. 102 TFEU into unchartered territory. The Commission found that Google had abused its dominant position by guaranteeing its own comparison shopping website a more prominent placement on the result page of its general internet search engine than rival comparison shopping services. In November 2021, this decision was upheld on appeal by the General Court of the European Union (case T-612/17 Google and Alphabet v Commission (Google Shopping) ECLI:EU:T:2021:763). This Insight critically reflects on this watershed ruling. The General Court's Google Shopping judgment poses once more the unsettled question of the exact boundaries of the concept of abuse of dominance under art. 102 TFEU. This Insight analyses different attempts by the General Court to redraw the scope of art. 102 TFEU by pinning down the constitutive elements of abusive self-preferencing. Although the Court considered various pathways to determine the legality of self-preferencing, it failed to articulate a clear legal test that establishes limiting principles as to when self-preferencing by a dominant firm violates EU competition law. In light of this finding, this Insight sketches an alternative pathway that would have enabled the General Court to ground the novel theory of harm of self-preferencing within a legally and economically sound framework.
Type II Seesaw and the PAMELA/ATIC Signals
Creators: name: Gogoladze, Ilia
name: Okada, Nobuchika
name: Shafi, Qaisar
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss how the cosmic ray signals reported by the PAMELA and ATIC/PPB-BETS experiments may be understood in a Standard Model (SM) framework supplemented by type II seesaw and a stable SM singlet scalar boson as dark matter. A particle physics explanation of the 'boost' factor can be provided by including an additional SM singlet scalar field.
description: 10 pages, 2 figures
Ten-Dimensional Super-Twistors and Super-Yang-Mills
Creators: name: Berkovits, Nathan
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Four-dimensional super-twistors provide a compact covariant description of on-shell N=4 d=4 super-Yang-Mills. In this paper, ten-dimensional super-twistors are introduced which similarly provide a compact covariant description of on-shell d=10 super-Yang-Mills. The super-twistor variables are Z=(lambda^alpha, mu_alpha, Gamma^m) where lambda^alpha and mu_alpha are constrained bosonic d=10 spinors and Gamma^m is a constrained fermionic d=10 vector. The Penrose map relates the twistor superfield Phi(Z) with the d=10 super-Yang-Mills vertex operator lambda^alpha A_alpha(x,theta) which appears in the pure spinor formalism of the superstring, and the cubic super-Yang-Mills amplitude is proportional to the super-twistor integral \int dZ Phi_1 Phi_2 Phi_3.
description: 14 pages harvmac, added short clarification
Adiabatic Connection for Strictly-Correlated Electrons
Creators: name: Liu, Zhenfei
name: Burke, Kieron
Publisher: name: arXiv
Year: 2009
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Modern density functional theory (DFT) calculations employ the Kohn-Sham (KS) system of non-interacting electrons as a reference, with all complications buried in the exchange-correlation energy (Exc). The adiabatic connection formula gives an exact expression for Exc. We consider DFT calculations that instead employ a reference of strictly-correlated electrons. We define a "decorrelation energy" that relates this reference to the real system, and derive the corresponding adiabatic connection formula. We illustrate this theory in three situations, namely the uniform electron gas, Hooke's atom, and the stretched hydrogen molecule. The adiabatic connection for strictly-correlated electrons provides an alternative perspective for understanding density functional theory and constructing approximate functionals.
description: 4 figures, has been published in J. Chem. Phys
Staying connected : mechanisms related to the wellbeing of older adults online
Creators: name: Sinclair, TJ
Publisher: name: University Of Tasmania
Year: 2023

description: Social connection and the need to belong are central to human motivations in order to maintain optimal health. With the reality of an ageing population, it is vital to identify ways to keep older adults connected and included. This was the first study to examine whether, and to what extent, older adults can derive feelings of social connectedness online. Further, this study investigated the relationship between online-derived social connectedness, belongingness orientation and wellbeing outcomes in older adults. Participants (N=241) aged between 55 and 81 completed an online survey which measured social connection: online and offline; the need to belong: growth orientation; and wellbeing outcomes: physical health, loneliness, depression, stress, anxiety, and subjective wellbeing. As hypothesised, older adults gained feelings of social connectedness online, similar to that gained from traditional networks, and to the same extent as younger people. The hypothesised moderated mediation was supported for loneliness and depression, partially supported for stress and subjective wellbeing, but was not supported for anxiety. Results suggest that online social networks may be an alternative platform for older adults to maintain social connection and wellbeing, particularly for those with a growth belongingness orientation. Though causality cannot be inferred from the current design; it is suggested that online social networks may be a fruitful source of social connection for those less able to connect face-to-face.
The Mass-Metallicity relation in galaxies of different morphological types
Creators: name: Calura, F.
name: Pipino, A.
name: Chiappini, C.
name: Matteucci, F.
name: Maiolino, R.
name: Menci, N.
name: -
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: By means of chemical evolution models of different morphological types, we study the mass-metallicity (MZ) relation and its evolution with redshift. Our aim is to understand the role of galaxies of different morphological types in the MZ relation at various redshift. One major result is that at high redshift, the majority of the galaxies falling on the MZ plot are apparently proto-ellipticals. Finally, we show some preliminary results of a study of the MZ relation in a framework of hierarchical galaxy formation.
description: 4 pages, 2 figures, talk presented at "Probing Stellar Populations out to the Distant Universe," September 2008, Cefalu, Italy
Seesaw Options for Three Neutrinos
Creators: name: He, Xiao-Gang
name: Ma, Ernest
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The seesaw mechanism for three neutrinos is discussed, clarifying the situation where the seesaw texture results in three approximately zero mass eigenvalues. The true underlying mechanism is shown to be just the $inverse$ (or $linear$) seesaw, which explains why there could be large mixing. However, these zeroes cannot occur naturally, unless there is a conserved symmetry, i.e. lepton number $L$, either global or gauged, which is softly or spontaneously broken at the TeV scale. We discuss in particular the case where the three heavy singlet neutrinos have $L=3,-2,-1$.
description: Latex, 11 Pages with 1 figure. Some minor modifications and a reference added
Estimating characteristic length scales of dynamic biological systems : removing the need for long time series
Creators: name: Trebilco, J
Publisher: name: University Of Tasmania
Year: 2023

description: The choice of appropriate spatial s.cales for observing, conserving and managing systems are pervading questions in applied ecological research. Determining the characteristic length scales (CLSs) of ecological systems is likely to provide valuable information towards answering these questions. The CLS is the scale at which the ratio of deterministic signal to noise in a system's dynamics is maximised i.e. the scale that captures the meaningful signal in the system's dynamics. Recent methods for identifying the CLS are attractive because they accommodate the complex non-linear behaviours that occur in ecological systems. However, these methods require long temporal data series and so are unrealistic for most natural systems. This thesis develops and examines two alternatives to using long time series data to estimate CLSs. The first is a short time series approach that requires data from only three or four consecutive landscapes. The second approach uses spatial data from a single point in time. The performance of these methods is compared with current techniques, using data from spatial competition systems. The model systems employed in this study are more complex than models examined by previous authors and provide a better indication of how CLSs might perform with real data sets. Results indicate that the short time series approach to estimating CLSs is more consistent in its interpretation than the long time series method, and has great potential for application to natural systems. A comparison of CLS results with more conventional analyses for identifying scales of spatial pattern (variograms and nested ANOV A) suggests that a combination of the two approaches may be most successful for defining characteristic scales in applied ecological contexts.
Towards the electron EDM search. Theoretical study of PbF
Creators: name: Baklanov, K. I.
name: Petrov, A. N.
name: Titov, A. V.
name: Kozlov, M. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We report ab initio relativistic correlation calculations of potential curves and spectroscopic constants for four lowest-lying electronic states of the lead monofluoride. We also calculated parameters of the spin-rotational Hamiltonian for the ground and the first excited states including P,T-odd and P-odd terms. In particular, we have obtained hyperfine constants of the $^{207}$Pb nucleus. For the $^2Π_{1/2}$ state $A_\perp=-6859.6$ MHz, $A_\|=9726.9$ MHz and for the A$^2Σ^+_{1/2}$ $A_\perp=1720.8$ MHz, $A_\|=3073.3$ MHz. Our values of the ground state hyperfine constants are in good agreement with the previous theoretical studies. We discuss and explain seeming disagreement in the sign of the constant $A_\perp$ with the recent experimental data. The effective electric field on the electron $E_{eff}$, which is important for the planned experiment to search for the electric dipole moment of the electron, is found to be 3.3 * 10^{10} V/cm.
Examining the role of extraversion and affiliation motivation as predictors of social anxiety
Creators: name: Kirkwood, MJE
Publisher: name: University Of Tasmania
Year: 2023

description: This study examined the role of extraversion and Hill's (1987) aspects of affiliation motivation, which include emotional support, attention, positive stimulation, and social comparison motivations, as predictors of social anxiety. Undergraduate students (N = 310) completed measures of extraversion and Hill's (1987) aspects of affiliation motivation, with responses analysed through hierarchical regression. The regression model showed that extraversion and affiliation motivation significantly predict social anxiety. More specifically, being less extroverted and possessing an interpersonal style oriented toward attention seeking significantly predicted social anxiety. The sample for this study was drawn from an Australian university and not specifically from a clinical population. Replicating this research in a clinical context could provide insight into both the collective and individual differences around social anxiety, extraversion and affiliation motivation. Also, this approach could better inform clinical interventions and facilitate therapy tailored to address, for example, low extraversion or specific aspects of affiliation motivation contributing to an individual's social anxiety.
Perspectives of Individuals With Aphasia, Their Family Members, and Physicians Regarding Communication in Medical Interactions (Burns et al., 2015)
Creators: name: Burns, Michael
name: Baylor, Carolyn
name: Dudgeon, Brian J.
name: Starks, Helene
name: Yorkston, Kathryn
Publisher: name: ASHA journals
Year: 2015
Subjects: subject: 170204 Linguistic Processes (incl. Speech Production and Comprehension)
subject: FOS: Psychology

description: Purpose The purpose of this study was to explore the experiences of patients with aphasia, their family members, and physicians related to communication during medical interactions.
Method Face-to-face, semistructured interviews were conducted with 18 participants—6 patients with aphasia, 6 family members involved in patient care, and 6 practicing physicians. A qualitative description approach was used to collect and summarize narratives from participants' perspectives and experiences. Participants were asked about experiences with communication during medical interactions in which the family member accompanied the patient. Interviews were audio- and/or video-recorded, transcribed, and then coded to identify main themes. Results Patients and family members generally described their communication experiences as positive, yet all participants discussed challenges and frustrations. Three themes emerged: (a) patients and family members work as a team, (b) patients and family members want physicians to "just try" to communicate with the patient, and (c) physicians want to interact with patients but may not know how.
Conclusions Participants discussed the need for successful accommodation, or changing how one communicates, to help facilitate the patients' increased understanding and ability to express themselves. Over- and underaccommodation with communication were commonly reported as problems. Speech-language pathologists have a role to play in helping to improve communication during medical interactions. Implications for current speech-language pathologist practice and future directions of research are discussed.
Phase instability and coarsening in two dimensions
Creators: name: Misbah, Chaouqi
name: Politi, Paolo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Instabilities and pattern formation is the rule in nonequilibrium systems. Selection of a persistent lengthscale, or coarsening (increase of the lengthscale with time) are the two major alternatives. When and under which conditions one dynamics prevails over the other is a longstanding problem, particularly beyond one dimension. It is shown that the challenge can be defied in two dimensions, using the concept of phase diffusion equation. We find that coarsening is related to the λ-dependence of a suitable phase diffusion coefficient, D_{11}(λ), depending on lattice symmetry and conservation laws. These results are exemplified analytically on prototypical nonlinear equations.
description: Five pages. Introduction and summary strongly revised. One page of supplementary material has been added
Efficacy and safety of endoscopic drainage versus percutaneous drainage for pancreatic fluid collection; a systematic review and meta-analysis
Creators: name: Khizar, Hayat
name: Zhicheng, Huang
name: Chenyu, Le
name: Yanhua, Wu
name: Jianfeng, Yang
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Pancreatic fluid collections (PFC) are debris or fluid of the pancreas that needs to be drained out. This may result from surgery or necrotizing pancreatitis. This meta-analysis compared the outcomes of PFC through endoscopic and percutaneous interventions. A medical database was searched up to June 2022, comparing the outcomes of endoscopic drainage (ED) and percutaneous drainage (PD) for the PFC. Eligible studies reporting clinical and technical success and adverse events were selected. Seventeen studies with 1170 patients were included for meta-analysis, of which 543 patients underwent ED and 627 underwent PD. The odd ratio (OR) of technical success was 0.81 (95% confidence interval (CI) 0.31, 2.1) and clinical success was in the favor of the ED group at OR 2.23 (95% CI 1.45, 3.41). Adverse events OR 0.62 (95% CI 0.27, 1.39) and stent migration OR 0.61 (95% CI 0.10, 3.88) were the same in both groups, but hospital stay pooled mean difference of 15.02 days (95% CI 9.86, 20.18), mortality OR 0.24 (95% CI 0.09, 0.67), and re-interventions OR 0.25 (95% CI 0.16, 0.40) favored ED. ED is safe and efficient for PFC with higher clinical success, lower mortality rate, hospital stay, and re-interventions compared with PD.
Finite Temperature Casimir Effect in Kaluza-Klein Spacetime
Creators: name: Teo, L. P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this article, we consider the finite temperature Casimir effect in Kaluza-Klein spacetime due the the vacuum fluctuation of massless scalar field with Dirichlet boundary conditions. We consider the general case where the extra dimensions (internal space) can be any compact connected manifold or orbifold without boundaries. Using piston analysis, we show that the Casimir force is always attractive at any temperature, regardless of the geometry of the internal space. Moreover, the magnitude of the Casimir force increases as the size of the internal space increases and it reduces to the Casimir force in (3+1)-dimensional Minskowski spacetime when the size of the internal space shrinks to zero. In the other extreme where the internal space is large, the Casimir force can increase beyond all bound. Asymptotic behaviors of the Casimir force in the low and high temperature regimes are derived and it is observed that the magnitude of the Casimir force grows linearly with temperature in the high temperature regime.
description: 20 pages, 1 figure
Excitation of coherent polaritons in a two-dimensional atomic lattice
Creators: name: Barinov, I. O.
name: Alodjants, A. P.
name: Arakelian, S. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We describe a new type of spatially periodic structure (lattice models): a polaritonic crystal (PolC) formed by a two-dimensional lattice of trapped two-level atoms interacting with quantised electromagnetic field in a cavity (or in a one-dimensional array of tunnelling-coupled microcavities), which allows polaritons to be fully localised. Using a one-dimensional polaritonic crystal as an example, we analyse conditions for quantum degeneracy of a low-branch polariton gas and those for quantum optical information recording and storage.
description: 8 pages, 3 figures
High Precision MultiWave Rectifier Circuit Operating in Low Voltage 1.5 Volt Current Mode
Creators: name: Burapattanasiri, Bancha
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: This article is present high precision multiwave rectifier circuit operating in low voltage plus or minus 1.5 Volt current modes by CMOS technology 0.5 \mum, receive input and give output in current mode, respond at high frequency period. The structure compound with high speed current comparator circuit, current mirror circuit, and CMOS inverter circuit. PSpice program used for confirmation the performance of testing. The PSpice program shows operating of circuit is able to working at maximum input current 400 \muAp p, maximum frequency responding 200 MHz, high precision and low power losses, and non-precision zero crossing output signal.
description: 5 pages IEEE format, International Journal of Computer Science and Information Security, IJCSIS December 2009, ISSN 1947 5500, http://sites.google.com/site/ijcsis/