cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Configuration spaces of hard spheres
Creators: name: Ericok, O. B.
name: Ganesan, K.
name: Mason, J. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Hard sphere systems are often used to model simple fluids. The configuration spaces of hard spheres in a three-dimensional torus modulo various symmetry groups are comparatively simple, and could provide valuable information about the nature of phase transitions. Specifically, the topological changes in the configuration space as a function of packing fraction have been conjectured to be related to the onset of first-order phase transitions. The critical configurations for one to twelve spheres are sampled using a Morse-theoretic approach, and are available in an online, interactive database. Explicit triangulations are constructed for the configuration spaces of the two sphere system, and their topological and geometric properties are studied. The critical configurations are found to be associated with geometric changes to the configuration space that connect previously distant regions and reduce the configuration space diameter as measured by the commute time and diffusion distances. The number of such critical configurations around the packing fraction of the solid-liquid phase transition increases exponentially with the number of spheres, suggesting that the onset of the first-order phase transition in the thermodynamic limit is associated with a discontinuity in the configuration space diameter.
description: 15 pages, 16 figures
Η χρήση της υβριδικής μάθησης για την ανάπτυξη γλωσσικών δεξιοτήτων των μαθητών στη πρωτοβάθμια εκπαίδευση μέσω της πλατφόρμας Moodle
Creators: name: Μωυσιάδου, Ειρήνη Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Υβριδική Μάθηση
Γλωσσικές Δεξιότητες
Πλατφόρμα Moodle
Blended Learning
Linguistic Skills
Platform Moodle

description: Η παρούσα εργασία πραγματεύεται τη χρήση της υβριδικής μάθησης στην ανάπτυξη των γλωσσικών δεξιοτήτων στα παιδιά πρωτοβάθμιας εκπαίδευσης μέσω της πλατφόρμας Moodle. Αρχικά, αναλύεται η έννοια της υβριδικής μάθησης και οι μορφές της. Ακόμη, παρουσιάζονται τα εργαλεία web 2.0 και η χρήση τους στην εκπαίδευση. Εν συνεχεία, γίνεται αναφορά στην πλατφόρμα Moodle, στα χαρακτηριστικά και τις λειτουργίες της. Κατόπιν αναπτύσσεται το ζήτημα της γλωσσικής ανάπτυξης και ποιες γλωσσικές δεξιότητες κατακτά το παιδί ανά ηλικία , ενώ επιχειρείται να προσεγγιστεί η γλωσσική ανάπτυξη μέσα από την πρακτική της υβριδικής μάθησης με τη δημιουργία ενός ηλεκτρονικού μαθήματος στην πλατφόρμα Moodle με περιεχόμενο τα γραμματικά φαινόμενα του δημοτικού σχολείου.
description: The dissertation examines the use of the blended learning for the development of linguistic skills of the students in primary school through the platform Moodle. Firstly, the meaning and forms of blended learning is analyzed. Moreover, the web 2.0 tools are presented and as well their use in education. It is also referred to the Moodle platform and especially about their characteristics and operations. The issue of linguistic development is explicated and it is also examined the specific linguistic skills which are adopted by the children of each age. In the end, the creation of an online course in the Moodle platform is attempted to accomplish which is referred to the linguistic development through the Moodle platform based on the grammatical phenomena in primary education.
Parallel Algorithms for the Longest Common Subsequence Problem
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 80201 Analysis of Algorithms and Complexity
subject: FOS: Computer and information sciences
subject: 80302 Computer System Architecture

description: subsequence of a given string is any string obtainedby deleting none or some symbols from the given string.A longest common subsequence of two strings is a commonsubsequence of both that is as long as any other common subsequences. The longest common subsequence problem is to find the longest common subsequence of two given strings. The bound on the complexity of this problem under the decision tree model is known as mn if the number of distinct symbols that can appear in strings is infinite, where m and n are the lengths of the two strings, respectively, and m ≤ n. In this paper, we propose two parallel algorithms for this problem on the CREW-PRAM model. One takes O(log2 m + log n) time with mn/ log m processors, which is faster than all the existing algorithms on the same model. The other takes O(log2 m log log m) time with mn/ log2 m log log m processors when log2 m log log m > log n, or otherwise O(log n) time with mn/ log n processors, which isoptimal in the sense that the time x processors bound matches the complexity bound of the problem. Both algorithms exploit nice properties of the LCS problem that are discovered in this paper.
Potato Crop Stress Identification in Aerial Images using Deep Learning-based Object Detection
Creators: name: Butte, Sujata
name: Vakanski, Aleksandar
name: Duellman, Kasia
name: Wang, Haotian
name: Mirkouei, Amin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recent research on the application of remote sensing and deep learning-based analysis in precision agriculture demonstrated a potential for improved crop management and reduced environmental impacts of agricultural production. Despite the promising results, the practical relevance of these technologies for field deployment requires novel algorithms that are customized for analysis of agricultural images and robust to implementation on natural field imagery. The paper presents an approach for analyzing aerial images of a potato (Solanum tuberosum L.) crop using deep neural networks. The main objective is to demonstrate automated spatial recognition of healthy vs. stressed crop at a plant level. Specifically, we examine premature plant senescence resulting in drought stress on Russet Burbank potato plants. We propose a novel deep learning (DL) model for detecting crop stress, named Retina-UNet-Ag. The proposed architecture is a variant of Retina-UNet and includes connections from low-level semantic representation maps to the feature pyramid network. The paper also introduces a dataset of aerial field images acquired with a Parrot Sequoia camera. The dataset includes manually annotated bounding boxes of healthy and stressed plant regions. Experimental validation demonstrated the ability for distinguishing healthy and stressed plants in field images, achieving an average dice score coefficient (DSC) of 0.74. A comparison to related state-of-the-art DL models for object detection revealed that the presented approach is effective for this task. The proposed method is conducive toward the assessment and recognition of potato crop stress in aerial field images collected under natural conditions.
description: 15 pages, 4 figures
Diffractive Deep-Inelastic Scattering with a Leading Proton at HERA
Creators: name: H1 Collaboration
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The cross section for the diffractive deep-inelastic scattering process $ep \to e X p$ is measured, with the leading final state proton detected in the H1 Forward Proton Spectrometer. The data analysed cover the range \xpom <0.1 in fractional proton longitudinal momentum loss, 0.08 < |t| < 0.5 GeV^{-2} in squared four-momentum transfer at the proton vertex, 2 < Q^2 < 50 GeV^2 in photon virtuality and 0.004 < β= x / \xpom < 1, where x is the Bjorken scaling variable. For $\xpom \lapprox 10^{-2}$, the differential cross section has a dependence of approximately ${\rm d} σ/ {\rm d} t \propto e^{6 t}$, independently of \xpom, βand Q^2 within uncertainties. The cross section is also measured triple differentially in \xpom, βand Q^2. The \xpom dependence is interpreted in terms of an effective pomeron trajectory with intercept $α_{\pom}(0)=1.114 \pm 0.018 ({\rm stat.}) \pm 0.012 ({\rm syst.}) ^{+0.040}_{-0.020} ({\rm model})$ and a sub-leading exchange. The data are in good agreement with an H1 measurement for which the event selection is based on a large gap in the rapidity distribution of the final state hadrons, after accounting for proton dissociation contributions in the latter. Within uncertainties, the dependence of the cross section on x and Q^2 can thus be factorised from the dependences on all studied variables which characterise the proton vertex, for both the pomeron and the sub-leading exchange.
description: 32 pages, 9 figures, 8 tables
Polarization rotation and near-Earth quantum communications
Creators: name: Dahal, Pravin Kumar
name: Terno, Daniel R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We revisit polarization rotation due to gravity, known as the gravitational Faraday effect, with a view on its role in quantum communications with Earth-orbiting satellites. In a static spherically symmetric gravitational field Faraday rotation is purely a reference frame (gauge) effect. This is so also in the leading post-Newtonian expansion of the Earth's gravitational field. However, establishing the local reference frame with respect to distant stars leads to the nonzero Faraday phase. In communications between a ground station and an Earth-orbiting spacecraft this phase is of the order of 10^-10. Under the same conditions the Wigner phase of special relativity is typically of the order 10^-4--10^-5. These phases lead to the physical lower bound on communication errors. However, both types of errors can be simultaneously mitigated. Moreover, they are countered by a fully reference frame independent scheme that also handles arbitrary misalignment between the reference frames of sender and receiver.
description: 9 pages, 3 figures Published version
Angular correlations of lepton pairs from vector boson and top quark decays in Monte Carlo simulations
Creators: name: Frixione, S.
name: Laenen, E.
name: Motylinski, P.
name: Webber, B. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explain how angular correlations in leptonic decays of vector bosons and top quarks can be included in Monte Carlo parton showers, in particular those matched to NLO QCD computations. We consider the production of $n$ pairs of leptons, originating from the decays of $n$ electroweak vector bosons or of $n$ top quarks, in the narrow-width approximation. In the latter case, the information on the $n$ $b$ quarks emerging from the decays is also retained. We give results of implementing this procedure in MC@NLO
description: 20 pages Latex; 6 figures included
Deep reinforcement learning for smart calibration of radio telescopes
Creators: name: Yatawatta, Sarod
name: Avruch, Ian M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Modern radio telescopes produce unprecedented amounts of data, which are passed through many processing pipelines before the delivery of scientific results. Hyperparameters of these pipelines need to be tuned by hand to produce optimal results. Because many thousands of observations are taken during a lifetime of a telescope and because each observation will have its unique settings, the fine tuning of pipelines is a tedious task. In order to automate this process of hyperparameter selection in data calibration pipelines, we introduce the use of reinforcement learning. We test two reinforcement learning techniques, twin delayed deep deterministic policy gradient (TD3) and soft actor-critic (SAC), to train an autonomous agent to perform this fine tuning. For the sake of generalization, we consider the pipeline to be a black-box system where the summarized state of the performance of the pipeline is used by the autonomous agent. The autonomous agent trained in this manner is able to determine optimal settings for diverse observations and is therefore able to perform 'smart' calibration, minimizing the need for human intervention.
description: MNRAS Accepted 2021 May 12. Received 2021 May 11; in original form 2021 February 5
Learning from graphs: a spectral perspective
Creators: name: Defferrard, Michaël
Publisher: name: Zenodo
Year: 2021

description: The architecture of a neural network constrains the space of functions it can implement. Equivariance is one such constraint—enabling weight sharing and guaranteeing generalization. But symmetries alone might not be enough: for example, social networks, finite grids, and sampled spheres have few automorphisms. I will discuss how spectral graph theory yields vertex representations and a generalized convolution that shares weights beyond symmetries.
Ferromagnetism below 10 K in Mn doped BiTe
Creators: name: Bos, J. W. G.
name: Lee, M.
name: Morosan, E.
name: Zandbergen, H. W.
name: Lee, W. L.
name: Ong, N. P.
name: Cava, R. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ferromagnetism is observed below 10 K in [Bi0.75Te0.125Mn0.125]Te. This material has the BiTe structure, which is made from the stacking of two Te-Bi-Te-Bi-Te blocks and one Bi-Bi block per unit cell. Crystal structure analysis shows that Mn is localized in the Bi2 blocks, and is accompanied by an equal amount of TeBi anti-site occupancy in the Bi2Te3 blocks. These TeBi anti-site defects greatly enhance the Mn solubility. This is demonstrated by comparison of the [Bi1-xMnx]Te and [Bi1-2xTexMnx]Te series; in the former, the solubility is limited to x = 0.067, while the latter has xmax = 0.125. The magnetism in [Bi1-xMnx]Te changes little with x, while that for [Bi1-2xTexMnx]Te shows a clear variation, leading to ferromagnetism for x > 0.067. Magnetic hysteresis and the anomalous Hall Effect are observed for the ferromagnetic samples.
description: Accepted for publication in Phys. Rev. B
Improved Lyman Alpha Tomography using Optimized Reconstruction with Constraints on Absorption (ORCA)
Creators: name: Li, Zihao
name: Horowitz, Benjamin
name: Cai, Zheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this work, we propose an improved approach to reconstruct the three-dimensional intergalactic medium from observed Lyman-$α$ forest absorption features. We present our new method, the Optimized Reconstruction with Constraints on Absorption (ORCA), which outperforms the current baseline Wiener Filter (WF) when tested on mock Lyman Alpha forest data generated from hydrodynamical simulations. We find that both reconstructed flux errors and cosmic web classification improve substantially with ORCA, equivalent to 30-40\% additional sight-lines with the standard WF. We use this method to identify and classify extremal objects, i.e. voids and (proto)-clusters, and find improved reconstruction across all summary statistics explored. We apply ORCA to existing Lyman Alpha forest data from the COSMOS Lyman Alpha Mapping and Tomography Observations (CLAMATO) Survey and compare it to the WF reconstruction.
description: 15 pages, 12 figures
Additional file 1 of Effect of different weekly frequencies of Chen-style Tai Chi in elders with chronic non-specific low back pain: study protocol for a randomised controlled trial
Creators: name: Wan, Ruihan
name: Shi, Jian
name: Hu, Kun
name: Wang, Yafei
name: Jiang, Xue
name: Yan, Wangwang
name: Cao, Mali
name: Wang, Yuling
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. Instructions for Tai Chi.
Supernova Constraint on Self-Interacting Dark Sector Particles
Creators: name: Sung, Allan
name: Guo, Gang
name: Wu, Meng-Ru
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We examine the constraints on sub-GeV dark sector particles set by the proto-neutron star cooling associated with the core-collapse supernova event SN1987a. Considering explicitly a dark photon portal dark sector model, we compute the relevant interaction rates of dark photon ($A'$) and dark fermion ($χ$) with the Standard Model particles as well as their self-interaction inside the dark sector. We find that even with a small dark sector fine structure constant $α_D\ll 1$, dark sector self-interactions can easily lead to their own self-trapping. This effect strongly limits the energy luminosity carried away by dark sector particles from the supernova core and thus drastically affects the parameter space that can be constrained by SN1987a. We consider specifically two mass ratios $m_{A'}=3m_χ$ and $3m_{A'}=m_χ$ which represent scenarios where the decay of $A'$ to $χ\barχ$ is allowed or not. We show that SN1987a can only place bounds on the dark sector when $α_D\lesssim 10^{-15}$ ($10^{-7}$) for the former (latter) for $m_χ\lesssim 20$ MeV. Furthermore, this evades the supernova bounds on the widely-examined dark photon parameter space completely if $α_D\lesssim 10^{-7}$ for the former, while lifts the bounds when $α_D\lesssim 10^{-7}$ if $m_χ\lesssim 100$ MeV. Our findings thus imply that the existing supernova bounds on light dark particles can be generally evaded by a similar self-trapping mechanism. This also implies that non-standard strongly self-interacting neutrino is not consistent with the SN1987a observation. Same effects can also take place for other known stellar bounds on dark sector particles.
description: 24 pages, 6 figures
Τα μη-επανδρωμένα αεροσκάφη (μΕΑ) ως νέο τεχνολογικό εργαλείο πολέμου: Πολιτικές και στρατιωτικές παράμετροι από τη χρήση τους
Creators: name: Κιούσης, Παναγιώτης Ιωάννη-Νάκου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Μη-επανδρωμένα αεροσκάφη (μΕΑ)
Στοχευμένες ανθρωποκτονίες
Ισλαμικό κράτος στο Ιράκ και τη Συρία (ΙΚ)
Military Drones (UAVs)
Targeted killings
ISIS

description: Η παρούσα εργασία ασχολείται με τα μη-επανδρωμένα αεροσκάφη (μΕΑ) και τη χρήση τους σε στρατιωτικές και πολεμικές επιχειρήσεις. Εξηγεί τι είναι και πώς λειτουργεί ένα μΕΑ και αναλύει τις βασικές του χρήσεις, που είναι η περισυλλογή πληροφοριών, η επιτήρηση, η αναγνώριση και η εκτέλεση στοχευμένων χτυπημάτων. Εστιάζει ιδιαίτερα στις επιχειρήσεις περισυλλογής πληροφοριών και αναλύει τα πλεονεκτήματα των μΕΑ σε σχέση με τα επανδρωμένα αεροσκάφη και τους δορυφόρους. Πραγματοποιεί μια ιστορική αναδρομή στη χρήση μΕΑ για πολεμικούς και στρατιωτικούς σκοπούς, εστιάζοντας ιδιαίτερα στις προσπάθειες που έγιναν κατά τους δύο παγκόσμιους πολέμους, κατά τον Ψυχρό Πόλεμο, αλλά και κατά τον πόλεμο του Βιετνάμ. Η εργασία επικεντρώνεται επίσης στη χρήση μΕΑ στον ευρύτερο χώρο της Μέσης Ανατολής, είτε στα πλαίσια του πολέμου κατά της τρομοκρατίας που κήρυξαν οι ΗΠΑ την επαύριο της 11ης Σεπτεμβρίου 2001, είτε στα πλαίσια της ισραηλινο-παλαιστινιακής σύγκρουσης, είτε στα πλαίσια του συριακού εμφυλίου και της απόπειρας της οργάνωσης Ισλαμικό Κράτος (ISIS) να επικρατήσει στο Ιράκ και τη Συρία. Τέλος, διερευνά την επίδραση των μΕΑ στη σταθερότητα του διεθνούς συστήματος.
description: The subject of this thesis is unmanned aerial vehicles (UAVs – commonly known as “drones”) and their use for military purposes. It explains what is an UAV and how it operates. It analyzes their main military uses, which are intelligence, surveillance and reconnaissance missions (ISR), as well as execution of targeted killings. It explicates the advantages of UAVs in carrying out ISR missions in comparison with manned aircrafts and satellites. It reviews the history of military UAVs focusing on the early attempts during the two world wars and the later advances achieved during the Cold War and the Vietnam War. The thesis centers on the use of drones in the wider Middle East area within the contexts of the israeli-palestinian conflict, the syrian civil war and the attempt of ISIS to dominate in Iraq and Syria, as well as the global war on terror that the US declared in the wake of 9-11. Finally, it explores the effects of UAVs on the stability of the international system.
Then again, how often does the Unruh-DeWitt detector click if we switch it carefully?
Creators: name: Satz, Alejandro
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The transition probability in first-order perturbation theory for an Unruh-DeWitt detector coupled to a massless scalar field in Minkowski space is calculated. It has been shown recently that the conventional $iε$ regularisation prescription for the correlation function leads to non-Lorentz invariant results for the transition rate, and a different regularisation, involving spatial smearing of the field, has been advocated to replace it. We show that the non-Lorentz invariance arises solely from the assumption of sudden switch-on and switch-off of the detector, and that when the model includes a smooth switching function the results from the conventional regularisation are both finite and Lorentz invariant. The sharp switching limit of the model is also discussed, as well as the falloff properties of the spectrum for large frequencies.
description: 16 pages, v3. Final published version with section 5 expanded
Anxiety scale for pregnancy: development and validation
Creators: name: Doyle-Waters, Mary Madeleine R.
Publisher: name: University of British Columbia
Year: 2009

description: Women encounter physical, emotional, and psychological changes during pregnancy. The literature indicates that some women find these changes to be stressful. They may respond to this stress by feeling anxious. The frequency and intensity of the anxiety reaction depends on how women perceive these stressors and on their ability to cope with the anxiety. The studies that have investigated pregnancy and anxiety have used general measures of state anxiety. A search for a measure of anxiety that pertains to pregnancy produced a number of measures that were specific to one or several dimensions of pregnancy. There are no measures available that look at anxiety and the multidimensional components of pregnancy. Therefore the intent of this research project was to develop and validate such a measure. Spielberger’s theory and measure of state and trait anxiety was examined in detail. The development of The Anxiety Scale For Pregnancy (ASP) was based on his research of state anxiety. An extensive review of the literature on pregnancy led to the construction of the items for this measure. The initial 82 items were pretested by a group of experts in the field of pregnancy and a sample of 40 women. The revised items comprised ten dimensions of pregnancy and 73 items relating to those dimensions. This version of ASP was field tested on a group of 270 pregnant women. Validation of ASP was through confirmatory factor analysis, group differentiation, and concurrent validity. Confirmatory factor analysis of the ten dimensions and 73 items did not produce a good fit of the model. The model was respecified and resulted in a hypothesized model of 14 observed variables and five latent constructs, baby, labour, marital, attractive, and support. The overall goodness-of-fit for this model is excellent. Group differentiation was assesses throught the variables, trimester, gravidity, age, and health during pregnancy. The mean differences between the group variables and the subscales of ASP supported previous research in the domain of pregnancy and anxiety. Concurrent validity was demonstrated through the strong correlations between the scores of ASP and the State and Trait Anxiety Inventory, as well as ASP and the State Self-Esteem Scale which produced, as expected, a strong negative correlation. The results from this study indicate that the ASP is a valid measure of five different dimensions relating to pregnancy and those dimensions are based on an extensive review of the literature.
A SCUBA/Spitzer Investigation of the Far Infra-Red Extragalactic Background
Creators: name: Dye, S.
name: Eales, S. A.
name: Ashby, M. L. N.
name: Huang, J. -S.
name: Egami, E.
name: Brodwin, M.
name: Lilly, S.
name: Webb, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have measured the contribution of submillimeter and mid-infrared sources to the extragalactic background radiation at 70 and 160um. Specifically, we have stacked flux in 70 and 160um Spitzer Space Telescope (Spitzer) observations of the Canada-UK Deep Sub-millimeter Survey 14h field at the positions of 850um sources detected by SCUBA and also 8 and 24um sources detected by Spitzer. We find that per source, the SCUBA galaxies are the strongest and the 8um sources the weakest contributors to the background flux at both 70 and 160um. Our estimate of the contribution of the SCUBA sources is higher than previous estimates. However, expressed as a total contribution, the full 8um source catalogue accounts for twice the total 24um source contribution and ~10 times the total SCUBA source contribution. The 8um sources account for the majority of the background radiation at 160um with a flux of 0.87+/-0.16 MJy/sr and at least a third at 70um with a flux of 0.103+/-0.019 MJy/sr. These measurements are consistent with current lower limits on the background at 70 and 160um. Finally, we have investigated the 70 and 160um emission from the 8 and 24um sources as a function of redshift. We find that the average 70um flux per 24um source and the average 160um flux per 8 and 24um source is constant over all redshifts, up to z~4. In contrast, the low-redshift half (z<1) of the of 8um sample contributes approximately four times the total 70um flux of the high-redshift half. These trends can be explained by a single non-evolving SED.
description: 15 pages, 5 figures, accepted by MNRAS. This version incorporates various ammendments suggested by the referee and some new analysis
Extraction of the proton mass radius from the vector meson photoproductions near thresholds
Creators: name: Wang, Rong
name: Kou, Wei
name: Xie, Ya-Ping
name: Chen, Xurong
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present an analysis of the proton mass radius by studying the $t$-dependence of the differential cross sections of the vector meson photoproductions near the thresholds. At low energy, the photoproduction of a quarkonium off the proton is connected to the scalar gravitational form factor of the proton, which is sensitive to the proton mass distribution from the QCD trace anomaly. Under an assumption of the scalar form factor of dipole form, the proton mass radius is extracted via the near-threshold photoproduction data of J/$ψ$, $ϕ$ and $ω$ vector mesons. The average value of the proton mass radius is estimated to be $\sqrt{\left} = 0.67\pm0.03$ fm, with the dipole cutoff $m_{\rm s}=1.01\pm0.04$ GeV.
description: 5 pages, 2 figures, minor modifications
Avalanche Size Scaling in Sheared Three-Dimensional Amorphous Solid
Creators: name: Bailey, N. P.
name: Schiøz, J
name: Lemaître, A.
name: Jacobsen, K. W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We have studied the statistics of plastic rearrangement events in a simulated amorphous solid at T=0. Events are characterized by the energy release and the ``slip volume'', the product of plastic strain and system volume. Their distributions for a given system size $L$ appear to be exponential, but a characteristic event size cannot be inferred, because the mean values of these quantities increase as $L^α$ with $α\sim 3/2$. In contrast to results obtained in 2D models, we do not see simply connected avalanches. The exponent suggests a fractal shape of the avalanches, which is also evidenced by the mean fractal dimension and participation ratio.
description: Accepted for publication in Physical Review Letters
Quantum spatial search in two-dimensional waveguide arrays
Creators: name: Benedetti, C.
name: Tamascelli, D.
name: Paris, M. G. A.
name: Crespi, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Continuous-time quantum walks (CTQW) have shown the capability to perform efficiently the spatial search of a marked site on many kinds of graphs. However, most of such graphs are hard to realize in an experimental setting. Here we study CTQW spatial search on a planar triangular lattice by means of both numerical simulations and experiments. The experiments are performed using three-dimensional waveguide arrays fabricated by femtosecond laser pulses, illuminated by coherent light. We show that the retrieval of the marked site by the quantum walker is accomplished with higher probability than the classical counterpart, in a convenient time window placed early in the evolution.
description: 10 pages, version accepted by Phys. Rev. Appl
New Self-Routing Permutation Networks
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 100503 Computer Communications Networks
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 80302 Computer System Architecture
subject: FOS: Computer and information sciences

description: This brief Contribution is focused on self-routing permutationnetworks capable of routing all n! permutations of its n inputs to its n outputs without internal conflict. First, a self-routing permutation network named BNB SRPN is described. The network realizes the self-routing capability on the structure of the generalized baseline network, a modified model of the original baseline network. The network reduced both the hardware and the delay time compared with other comparable networks by a simple algorithm using 1-bit information for the routing decision. The network also has a good hardware regularity. In addition, a cost-effective self-routing network is presented, which is derived from the BNB SRPN. The network’s hardware complexity, O( N log N), is the same as that of the Benes network which is not self-routing. The principle realizing a modular structure is also presented. The modular structure is derived from the principle to localize the routing decision. It is shown thatthe modular structure results in the reduction of the total delay through the network.
Possible role of adenosine 5’-triphosphate in the cardiovascular system of the rat
Creators: name: Poon, Christina I.
Publisher: name: University of British Columbia
Year: 2009

description: The experiments described in this thesis were designed to characterize a possible role for adenosine 5’-triphosphate (ATP) in the cardiovascular system of the conscious rat. This study assessed the role of ATP in the control of mean arterial pressure (MAP), heart rate (HR), and mean circulatory filling pressure (MCFP) by examining the effects of receptor antagonists (of cx-adrenoceptors, P1- andP2-purinoceptors, and autonomic ganglia), chemi cal sympathectomy (by reserpine or guanethidine), and ATP per se. Furthermore, we compared the contribution of endogenous ATP and noradrenaline (NA) in basal vascular tone with that during drug-induced vasodilatation and concomittant elevation of sympa thetic nerve activity. Phentolamine (non-selective c-adrenoceptor antagonist) was found to be a more effective arterial than venous vasodilator in both basal conditions and during drug (hydralazine or nifedipine)-induced vasodilatation and reflex venoconstriction. While MCFP was not significantly decreased by phentolamine either under basal conditions or during hydralazine treatment, phentolamine did decrease MCFP in the presence of nifedipine. Following suramin treatment, the phentolamine-induced depressor effect was significantly potentiated whereas MCFP remained unchanged. Under basal conditions, mecamylamine very effectively reduced both MAP and MCFP whereas in the presence of hydralazine induced vasodilatation and elevated venomotor tone, ganglion blockade reduced MCFP but not MAP. Blockade ofP2-purinoceptors by suramin produced a dose-dependent increase in MAP and decrease in HR neither of which was affected by hydralazine, nifedipine, mecamylamine, reserpine, or guanethidine. Suramin failed to reduce MCFP in the pres ence of hydralazine, nifedipine, or guanethidine. In contrast, mecamylamine treatment revealed a significant dose-dependent decrease in MCFP by suramin, while reserpine treatment revealed a slight but significant decline in MCFP. l.v. infusion of ATP produced profound depressor and bradycardic effects. The ATP induced depressor effect was unaffected by mecamylamine and suramin whereas block ade of Pi-purinoceptors by 8-phenyltheophylline clearly and significantly attenuated this response. Blockade of P2y-purinoceptors by cibacron blue only slightly and insignificantly attenuated the depressor effect of ATP. ATP-induced bradycardia was not affected by mecamylamine or cibacron blue whereas 8-phenyltheophylline completely abolished this response and even revealed a slight, but insignificant, increase in HR in response toATP. Suramin slightly but insignificantly enhanced the ATP-induced bradycardia. ATP produced a slight but insignificant depression of MCFP which was unaltered in the presence of suramin, and slightly but insignificantly enhanced both during mecamylamine-induced ganglion blockade and following 8-phenyltheophylline treatment. Cibacron blue, in con trast, revealed a slight but insignificant ATP-induced increase in MCFP.
First-order transitions for some generalized XY models
Creators: name: Van Enter, Aernout
name: Romano, Silvano
name: Zagrebnov, Valentin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this note we demonstrate the occurrence of first-order transitions in temperature for some recently introduced generalized XY models, and also point out the connection between them and annealed site-diluted (lattice-gas) continuous-spin models.
Η επίτευξη της αυτονομίας στο αναπτυξιακό στάδιο της αναδυόμενης ενηλικίωσης σε μια περίοδο οικονομικής κρίσης: μια κοινωνιοψυχολογική προσέγγιση. Νέοι και νέες «σε αναμονή»
Creators: name: Μαραγκού, Ροζάννα Μάρκου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Αυτονομία
Αναδυόμενη ενηλικίωση
Οικονομική κρίση
Autonomy
Emerging Adulthood
Economic recession

description: Στόχος της παρούσας έρευνας ήταν η διερεύνηση της έννοιας της αυτονομίας, όπως αυτή δομείται από νέους/ες αναδυόμενους/ες ενήλικες, οι οποίοι ζουν εκτός της οικογενειακής τους εστίας, στην Ελλάδα, την περίοδο της οικονομικής κρίσης. Η παρούσα έρευνα εντάχθηκε στο ευρύτερο ερευνητικό σχέδιο Except για τον κοινωνικό αποκλεισμό των νέων στην Ευρώπη. Η θεωρητική βάση της έρευνας αναφέρεται στην αναπτυξιακή περίοδο της αναδυόμενης ενηλικίωσης. Η έρευνα είχε ποιοτικό και φαινομενολογικό σχεδιασμό, με το ενδιαφέρον να εστιάζεται στην ποιότητα της ατομικής εμπειρίας. Οι συμμετέχοντες ήταν 13 νέοι και νέες, 7 άνδρες και 6 γυναίκες, με Μ.Ο. ηλικίας τα 25 έτη, οι οποίοι και οι οποίες ζούσαν εκτός της γονικής τους εστίας την περίοδο της συνέντευξης. Ως μεθοδολογικό εργαλείο χρησιμοποιήθηκε η ημιδομημένη, θεματικά εστιασμένη συνέντευξη, και τα δεδομένα αναλύθηκαν με την μέθοδο της θεματικής ανάλυσης. Τα αποτελέσματα ανέδειξαν 5 θεματικές κατηγορίες, οι οποίες συζητήθηκαν υπό το πρίσμα της σύγχρονης βιβλιογραφίας.
description: The aim of the present master’s thesis was to investigate the meaning of autonomy, as it is being constructed by emerging adults who are currently living in their own house, in Greece during the economic recession period. The study was a part of a broader project on social exclusion of youths in Europe: Except project. The dissertation was based on the emerging adulthood theory. It had a qualitative methodological design, using semi structured interviews, as the main interest was focused on individual experience. The participants were 13 youths, 7 males and 6 females, with mean age 25 years and they were living in their own homes during the time of the interview. The data were analysed according to thematic analysis. Five thematic categories emerged. These categories are being discussed under the relevant, current research review.
Additional file 2 of Effect of different weekly frequencies of Chen-style Tai Chi in elders with chronic non-specific low back pain: study protocol for a randomised controlled trial
Creators: name: Wan, Ruihan
name: Shi, Jian
name: Hu, Kun
name: Wang, Yafei
name: Jiang, Xue
name: Yan, Wangwang
name: Cao, Mali
name: Wang, Yuling
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2. SPIRIT checklist.
Ανεόρταστη αγιότητα στους παπαδιαμαντικούς ήρωες
Creators: name: Νεονάκης, Αντώνιος Νικήτα
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Παπαδιαμάντης
Λογοτεχνικά συναξάρια
Ανεόρταστη Αγιότητα
Papadiamantis
Uncelebrated Holiness
Literary saint Biographies

description: Στόχος της εν λόγω εργασίας είναι ο εντοπισμός μέσα στην παπαδιαμαντική διηγηματογραφία εκείνων των λογοτεχνικών χαρακτήρων, των οποίων τον βίο ή και τον θάνατο ο συγγραφέας κοσμεί με γνωρίσματα αγιότητας. Με βάση, λοιπόν, τα κριτήρια αγιότητας της ορθόδοξης χριστιανικής παράδοσης, διερευνώνται έντεκα ήρωες που ενέπνευσαν τον Παπαδιαμάντη να συνθέσει το λογοτεχνικό συναξάρι τους. Επιπλέον, ο προσδιορισμός "ανεόρταστη" του τίτλου προσανατολίζει τον αναγνώστη στην ανώνυμη, λαϊκή αγιότητα των απλών, καθημερινών ανθρώπων του καιρού και του τόπου του συγγραφέα. Η μελέτη αυτών των απλών, ταπεινών και περιθωριακών «αγίων» αποδεικνύει ότι ο βιογράφος τους εντοπίζει την αγιότητα στην αμφιδρόμηση ανάμεσα στην ελευθερία που επιτρέπει την αγάπη και στην αγάπη που ελευθερώνει, φτάνοντας στον πυρήνα της θεολογίας του Ευαγγελίου.
description: The aim of this project is to locate those literary characters -in Papadiamantis’ short stories - whose life and death are possessed with attributes of holiness. Based on those holy criteria of the Orthodox Christian tradition, eleven heroes, who inspired Papadiamantis to write down their biography, emerge. It’s worth mentioning though, that the title’s clarification ‘Uncelebrated Holiness’ defines the content and perspective of the study; it focuses, obviously, the reader’s attention on the folk holiness of ordinary, everyday people of the writer’s era and place. Reading closely the biography of the specific heroes, it turns out that sanctity, according to Papadiamantis, lies in a constant give and take between freedom that permits love and redeeming love. This is, thus, the holiness of the theology of gospel.
Origin of negative differential resistance in a strongly coupled single molecule-metal junction device
Creators: name: Pati, Ranjit
name: McClain, Mike
name: Bandyopadhyay, Anirban
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A new mechanism is proposed to explain the origin of negative differential resistance (NDR) in a strongly coupled single molecule-metal junction. A first-principles quantum transport calculation in a Fe-terpyridine linker molecule sandwiched between a pair of gold electrodes is presented. Upon increasing applied bias, it is found that a new phase in the broken symmetry wavefunction of the molecule emerges from the mixing of occupied and unoccupied molecular orbital. As a consequence, a non-linear change in the coupling between molecule and lead is evolved resulting to NDR. This model can be used to explain NDR in other class of metal-molecule junction device.
description: Submitted for review on Feb 4, 2008
A New Algorithm for Polynomial Product Modulo (ZN1 + 1) Implemented by the Real-valued W Transform
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 80201 Analysis of Algorithms and Complexity
subject: FOS: Computer and information sciences
subject: 10399 Numerical and Computational Mathematics not elsewhere classified
subject: FOS: Mathematics

description: As a basic operation, polynomial product modulo (ZN + 1) with real-valued coefficients plays an important part in digital signal/image processing. We present here a new algorithm for calculating this product implemented by the real-valued W transform. Applying the existing W transform algorithm as a subroutine our new algorithm needs only N(log2 N + 1/2) and real multiplications and 3N(log2 N - 1/2) real additions to compete the polynomial product modulo (zN + 1) with N = 2M. Also, because of its simplicity, regularity and parallelism, this new algorithm can be easily implemented in VLSI.
Nucleotide Frequencies in Human Genome and Fibonacci Numbers
Creators: name: Yamagishi, Michel E. Beleza
name: Shimabukuro, Alex Itiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Biological sciences

description: This work presents a mathematical model that establishes an interesting connection between nucleotide frequencies in human single-stranded DNA and the famous Fibonacci's numbers. The model relies on two assumptions. First, Chargaff's second parity rule should be valid, and, second, the nucleotide frequencies should approach limit values when the number of bases is sufficiently large. Under these two hypotheses, it is possible to predict the human nucleotide frequencies with accuracy. It is noteworthy, that the predicted values are solutions of an optimization problem, which is commonplace in many nature's phenomena.
description: 12 pages, 2 figures
Spin excitations in the heavily overdoped monolayer graphene superconductor: an analog to the cuprates
Creators: name: Lin, Wei-Jie
name: LiMing, W.
name: Zhou, Tao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recently it was reported experimentally that the monolayer graphene can be doped to beyond the Van Hove singularity. We study theoretically the possible superconductivity and the corresponding spin excitations of the monolayer graphene in this doping region. A static spin-density-wave state is favorable due to the nested Fermi surface as the Fermi level is doped to the Van Hove singularity point. Superconductivity may be realized upon further doping. The spin excitations in the superconducting state are studied theoretically based on the random phase approximation. The overall features are qualitatively the same with those in cuprate superconductors. Thus we have proposed an exciting possibility, namely, the heavily overdoped monolayer graphene can become a novel platform to study the unconventional superconductivity.
description: 6 pages, 4 figures
Φυτοχημική μελέτη ελληνικών ειδών του γένους Sideritis L.
Creators: name: Υφαντίδου, Δήμητρα Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Σιδηρίτης
Φυσικά προϊόντα
Βιολογικές δράσεις
Sideritis
Natural products
Biological activities

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη ελληνικών ειδών του γένους Sideritis L. Μελετήσαμε το είδος Sideritis sipylea, όπου με τη χρήση χρωματογραφικών και φασματοσκοπικών μεθόδων απομονώσαμε και ταυτοποιήσαμε πέντε από τα βασικά φυσικά προϊόντα του φυτού: τρία φλαβονοειδή, τη σαλβιγενίνη, τον απιγένινο-7-Ο-γλυκοσίδη και τον 4′-O-μεθυλοισοσκουτελαρεϊνο-7-O-[6′′′-O-ακετυλ]-αλλοσυλ(1→2)γλυκοσίδη, ένα ιριδοειδές, τον αγιουγκοσίδη κι έναν φαινυλαιθαοειδή γλυκοσίδη, τον ακτεοσίδη. Επίσης προσδιορίσαμε με in silico μελέτη την πρόβλεψη βιολογικής δράσης των ουσιών αυτών. Μελετήσαμε επιπλέον τα μεθανολικά εκχυλίσματα των εναέριων τμημάτων των ειδών Sideritis euboea, Sideritis clandestina subsp. peloponnesiaca, Sideritis raeseri subsp. attica και Sideritis scardica. Χρησιμοποιήσαμε φασματοσκοπία 1H-NMR και προσδιορίσαμε in vitro τη βιολογική δράση των εκχυλισμάτων με τη χρήση τριών τεχνικών: την αλληλεπίδραση με την ουσία 2,2-διφαινυλο-1-πυκριλυδραζίλιο (DPPH), την αναστολή της λιπιδικής υπεροξείδωσης (ΑΑPH) και την αναστολή της λιποξυγενάσης (LOX).
description: Τhe aim of this thesis was the phytochemical study on different species of genus Sideritis L. from Greece. We studied Sideritis sipylea, using different chromatographic and spectroscopic techniques. We isolated and identified five of the basic natural products of Sideritis L. Three of them are flavonoids: salvigenin, apigenin-7-O-glucoside and 4′-O-methylisoscutellarein 7-O-[6′′′-O-acetyl]-allosyl(1→2)glucoside, one iridoid: ajugoside and one phenylethanoid glucoside: acteoside. We, also, evaluated the biological activity of these five products using in silico studies. Moreover, we studied the methanolic extracts of the aerial parts of Sideritis euboea, Sideritis clandestina subsp. peloponnesiaca, Sideritis raeseri subsp. attica and Sideritis scardica. We used 1H-NMR spectroscopy and, also, tested the biological activity of the extracts using three in vitro techniques: the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, the inhibition of lipid peroxidation (AAPH) and the inhibition of lipoxygenase (LOX).
Table-top interferometry on extreme time and wavelength scales
Creators: name: Skruszewicz, S.
name: Przystawik, A.
name: Schwickert, D.
name: Sumfleth, M.
name: Namboodiri, M.
name: Hilbert, V.
name: Klas, R.
name: Gierschke, P.
name: Schuster, V.
name: Vorobiov, A.
name: Haunhorst, C.
name: Kip, D.
name: Limpert, J.
name: Rothhardt, J.
name: Laarmann, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: High-resolution Fourier-transform spectroscopy using table-top sources in the extreme ultraviolet (XUV) spectral range is still in its infancy. In this contribution a significant advance is presented based on a Michelson-type all-reflective split-and-delay autocorrelator operating in a quasi amplitude splitting mode. The autocorrelator works under a grazing incidence angle in a broad spectral range $\mathrm{(10\,nm - 1\,μm)}$ providing collinear propagation of both pulse replicas and thus a constant phase difference across the beam profile. The compact instrument allows for XUV pulse autocorrelation measurements in the time domain with a single-digit attosecond precision resulting in a resolution of $\mathrm{E/ΔE=2000}$. Its performance for spectroscopic applications is demonstrated by characterizing a very sharp electronic transition at $\mathrm{26.6\,eV}$ in Ar gas induced by the $\mathrm{11^{th}}$ harmonic of a frequency-doubled Yb-fiber laser leading to the characteristic $\mathrm{3s3p^{6}4p^{1}P^{1}}$ Fano-resonance of Ar atoms. We benchmark our time-domain interferometry results with a high-resolution XUV grating spectrometer and find an excellent agreement. The common-path interferometer opens up new opportunities for short-wavelength femtosecond and attosecond pulse metrology and dynamic studies on extreme time scales in various research fields.
description: 9 pages, 4 figures