cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hybrid Chaotic Method for Medical Images Ciphering
Creators: name: Ebrahim, Seham Muawadh Ali
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Healthcare is an essential application of e-services, where for diagnostic testing, medical imaging acquiring, processing, analysis, storage, and protection are used. Image ciphering during storage and transmission over the networks used has seen implemented using many types of ciphering algorithms for security purpose. Current cyphering algorithms are classified into two types: traditional classical cryptography using standard algorithms (DES, AES, IDEA, RC5, RSA, ...) and chaos cryptography using continuous (Chau, Rossler, Lorenz, ...) or discreet (Logistics, Henon, ...) algorithms. The traditional algorithms have struggled to combat image data as compared to regular textual data. Whereas, the chaotic algorithms are more efficient for image ciphering. The Significance characteristics of chaos are its extreme sensitivity to initial conditions and algorithm parameters. In this paper, medical image security based on hybrid/mixed chaotic algorithms is proposed. The proposed method is implemented using MATLAB. Where the image of the Retina of the Eye to detect Blood Vessels is ciphered. The Pseudo-Random Numbers Generators (PRNGs) from the different chaotic algorithms are implemented, and their statistical properties are evaluated using the National Institute of Standards and Technology NIST and other statistical test-suits. Then, these algorithms are used to secure the data, where the statistical properties of the cipher-text are also tested. We propose two PRNGs to increase the complexity of the PRNGs and to allow many of the NIST statistical tests to be passed: one based on two-hybrid mixed chaotic logistic maps and one based on two-hybrid mixed chaotic Henon maps, where each chaotic algorithm runs side-by-side and starts with random initial conditions and parameters (encryption keys). The resulting hybrid PRNGs passed many of the NIST statistical test suits.
Structure of A=10-13 nuclei with two- plus three-nucleon interactions from chiral effective field theory
Creators: name: Navratil, P.
name: Gueorguiev, V. G.
name: Vary, J. P.
name: Ormand, W. E.
name: Nogga, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Properties of finite nuclei are evaluated with two-nucleon (NN) and three-nucleon (NNN) interactions derived within chiral effective field theory (EFT). The nuclear Hamiltonian is fixed by properties of the A=2 system, except for two low-energy constants (LECs) that parameterize the short range NNN interaction. We constrain those two LECs by a fit to the A=3 system binding energy and investigate sensitivity of 4He, 6Li, 10,11B and 12,13C properties to the variation of the constrained LECs. We identify a preferred choice that gives globally the best description. We demonstrate that the NNN interaction terms significantly improve the binding energies and spectra of mid-p-shell nuclei not just with the preferred choice of the LECs but even within a wide range of the constrained LECs. At the same time, we find that a very high quality description of these nuclei requires further improvements to the chiral Hamiltonian.
description: 4 pages, 4 figures
Accelerated expansion in string theory, part I
Creators: name: Moritz, Jakob
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2019

description: back-to-back blackboard seminar with Alexander Westphal, Cambridge, Jefferson Physical Laboratory, Harvard University,, USA
description: It is notoriously difficult to engineer successful models of inflation and late time expansion in string theory. We discuss what are generic difficulties encountered in string model building and emphasize the particular role played by the KKLT proposal in the recent debate surrounding the "no-dS conjecture". We outline how KKLT passes non-trivial 10d consistency requirements. However, we also explain how simple geometrical consistency constraints indicate a generic difficulty to find SUSY breaking AdS or dS vacua as opposed to run-away solutions only.
Optical depth for VHE gamma-rays from distant sources from a generic EBL density
Creators: name: Raue, M.
name: Mazin, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Very-high-energy (VHE; E>100GeV) gamma-rays from distant sources suffer attenuation through pair-production with low energy photons from the diffuse extragalactic photon fields in the ultraviolet (UV) to far-infrared (FIR) (commonly referred to as Extragalactic Background Light; EBL). When modeling the intrinsic spectra of the VHE gamma-ray sources it is crucial to correctly account for the attenuation. Unfortunately, direct measurements of the EBL are difficult and the knowledge about the EBL over certain wavelength ranges is poor. To calculate the EBL attenuation usually predictions from theoretical models are used. Recently, the limits on the EBL from direct and indirect methods have narrowed down the possible EBL range and many of the previous models are in conflict with these limits. We propose a new generic EBL density (not a complete model), which is in compliance with the new EBL limits. EBL evolution with redshift is included in the calculation in a very simple but effective ad-hoc way. Properties of this generic EBL are discussed.
description: Proceedings of the workshop 'High Energy Phenomena in Relativistic Outflows' (HEPRO), Dublin, 24-28 September 2007
XOLCHAYON SAROYI: TARIX VA BUGUN
Creators: name: Isomiddinov, Sanjarbek
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada Xolchayon saroyi yodgorligining o‘rganilishi, o‘tmishi va bugungi kundagi holati, shuningdek, majmuaning tarkibiy qismi, yaratilish tarixi va  uning qadimgi ko‘rinishi mufassal bayon etilishi bilan birgalikda arxeologik topilmalari, saroyning tuzilishi, tarixiy va bugungi kundagi ahamiyati haqida keng yoritib berilgan. Bundan tashqari, Xolchayon saroyini muhofazaga olish va unga e’tiborni kuchaytirish maqsadida huquqiy kafolatini ta’minlash va turizmni rivojlantirish zarurligi haqida ham bayon qilingan, xulosa va takliflar berilgan.
Field demonstration of distributed quantum sensing without post-selection
Creators: name: Zhao, Si-Ran
name: Zhang, Yu-Zhe
name: Liu, Wen-Zhao
name: Guan, Jian-Yu
name: Zhang, Weijun
name: Li, Cheng-Long
name: Bai, Bing
name: Li, Ming-Han
name: Liu, Yang
name: You, Lixing
name: Zhang, Jun
name: Fan, Jingyun
name: Xu, Feihu
name: Zhang, Qiang
name: Pan, Jian-Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Distributed quantum sensing can provide quantum-enhanced sensitivity beyond the shot-noise limit (SNL) for sensing spatially distributed parameters. To date, distributed quantum sensing experiments have been mostly accomplished in laboratory environments without a real space separation for the sensors. In addition, the post-selection is normally assumed to demonstrate the sensitivity advantage over the SNL. Here, we demonstrate distributed quantum sensing in field and show the unconditional violation (without post-selection) of SNL up to 0.916 dB for the field distance of 240 m. The achievement is based on a loophole free Bell test setup with entangled photon pairs at the averaged heralding efficiency of 73.88%. Moreover, to test quantum sensing in real life, we demonstrate the experiment for long distances (with 10-km fiber) together with the sensing of a completely random and unknown parameter. The results represent an important step towards a practical quantum sensing network for widespread applications.
description: 8 pages, 5 figures
Το αντωνυμικό σύστημα της πομακικής:
Creators: name: Orchan, Aziz Νουρή
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Αντωνυμίες
Μορφολογία
Πομακική γλώσσα
Pronouns
Morphology
Pomak language

description: Το θέμα της εργασίας είναι το αντωνυμικό σύστημα της πομακικής• πρώτος σκοπός της είναι η καταγραφή και η μελέτη όλων των τύπων των αντωνυμιών στην πομακική διάλεκτο. Σε δεύτερο επίπεδο, στόχος της εργασίας είναι να ανιχνευθεί ο βαθμός αρχαϊκότητας και νεωτερικότητας της πομακικής, όπως τουλάχιστον φαίνεται από το σύνολο των αντωνυμιών. Τρίτος στόχος είναι να φανεί κατά πόσο αυξάνονται ή μειώνονται οι (κλιτοί ή άκλιτοι) αντωνυμικοί τύποι της πομακικής στα νεότερα χρόνια. Οι στόχοι αυτοί επιτυγχάνονται με την εξέταση υλικού που συλλέχθηκε με επιτόπια έρευνα σε χωριά του Νομού Ξάνθης, απομαγνητοφωνήθηκε και προστέθηκε στο τέλος της εργασίας ως παράρτημα. Η άμεση επαφή που έχω με την πομακική γλώσσα, λόγω της καταγωγής μου, βοήθησε στον καλύτερο έλεγχο του υλικού. Οι αντωνυμικοί τύποι της πομακικής διακρίθηκαν σε εννέα είδη: προσωπικές, κτητικές, αυτοπαθείς, οριστικές, δεικτικές, αναφορικές, ερωτηματικές, αόριστες και αρνητικές. Οι τύποι κάθε είδους εντάχθηκαν σε κλιτικά συστήματα με βάση κατηγορίες όπως: γένος, αριθμό, πτώση και πρόσωπο.
description: The subject of my postgraduate thesis is the pronominal system of the Pomak language. My first aim is to record and analyze all forms of the pronouns used in the language. A second aim is to trace the level of archaic and/or new features of the language where pronouns are concerned. A final aim is to show whether pronominal forms (finite or infinite) have increased or decreased in recent years. These goals are achieved through the investigation of data collected during a field study at some villages of the prefecture of Xanthi. The recorded material was written down and added in the appendix following the main body of the study. The Pomak language is my mother tongue which allowed me to exercise a better control over the material collected. The pronominal forms were divided in nine types: personal, possessive, reflexive, emphatic, demonstrative, relative, interrogative, indefinite and negative. The forms of each type were inserted in declensional paradigms according to categories such as gender, number, case and person.
Work Fluctuations and Stochastic Resonance
Creators: name: Saikia, Shantu
name: Roy, Ratnadeep
name: Jayannavar, A. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study Brownian particle motion in a double-well potential driven by an ac force. This system exhibits the phenomenon of stochastic resonance. Distribution of work done on the system over a drive period in the time asymptotic regime have been calculated. We show that fluctuations in the input energy or work done dominate the mean value. The mean value of work done over a period as a function of noise strength can also be used to characterise stochastic resonance in the system. We also discuss the validity of steady state fluctuation theorems in this particular system.
description: 5 pages
Nonabsolute/relativistic (N/R) thinking: a possible unifying commonality underlying models of postformal reasoning
Creators: name: Yan, Bernice Lai-Ting
Publisher: name: University of British Columbia
Year: 2009

description: This dissertation identified and addressed four of the unresolved issues pertaining to the proposition that nonabsolute/ relativistic (N/R) thinking is one of the possible unifying commonalities underlying the selected models of postformal reasoning, namely Problem Finding, Dialectical Reasoning, Relativistic Operations and Reflective Judgment. A total of 254 participants aged 10 to 48 and attending Grade 5 to doctoral studies were involved. Each participant was administered eight tests in pencil-and-paper format to measure eight different constructs of thinking. Different specific hypotheses were evaluated through different statistical approaches. The four identified issues were addressed as follows: Firstly, nonabsolute/ relativistic thinking was reconceptualized and operationally defined as a multidimensional and multilevel construct. Two dimensions were proposed: the basic form and the epistemic view. Within the basic form dimension, two levels were proposed: the formal and the postformal forms. Secondly, a battery of three tests was specifically designed by Arlin and the author to measure the different dimensions and levels of nonabsolute/ relativistic thinking. Thirdly, strong empirical evidence was obtained supporting the general hypothesis that nonabsolute/ relativistic thinking is a possible unifying commonality underlying the four selected postformal models. Within the construct of nonabsolute/ relativistic thinking, two dimensions, the basic form and the epistemic view, can be differentiated as hypothesized. Fourthly, empirical evidence was also obtained supporting the general hypothesis that nonabsolute/ relativistic thinking is an instance of both formal and postformal reasoning. Specifically within the basic form dimension, two qualitatively different forms, the formal and the postformal, can be differentiated as hypothesized. Findings also suggested that the development of a nonabsolute epistemic view might play a crucial role in the development of the postformal form. Therefore, the emergence of the postformal form can be explained by a paradigm shift from an absolute to a nonabsolute epistemic view. Performances in the tests of the postformal form and of the epistemic view in combination were found to be good predictors of performances in the selected postformal tests. Significant implications of the findings are that nonabsolute/ relativistic thinking represents a form of metamorphosis from closed-system to open-system thinking and it might serve as a potential springboard in the development of higher order thinking.
The origin of the red luminescence in Mg-doped GaN
Creators: name: Zeng, S.
name: Aliev, G. N.
name: Davies, J. J.
name: Wolverson, D.
name: Bingham, S. J.
name: Adbulmalik, D. A.
name: Coleman, P. G.
name: Parbrook, P. J.
name: Wang, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Optically-detected magnetic resonance (ODMR) and positron annihilation spectroscopy (PAS) experiments have been employed to study magnesium-doped GaN layers grown by metal-organic vapor phase epitaxy. As the Mg doping level is changed, the combined experiments reveal a strong correlation between the vacancy concentrations and the intensity of the red photoluminescence band at 1.8 eV. The analysis provides strong evidence that the emission is due to recombination in which electrons both from effective mass donors and from deeper donors recombine with deep centers, the deep centers being vacancy-related defects.
description: 4 pages, 3 figures
Libri-Adapt: A New Speech Dataset for Unsupervised Domain Adaptation
Creators: name: Mathur, Akhil
name: Kawsar, Fahim
name: Berthouze, Nadia
name: Lane, Nicholas D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper introduces a new dataset, Libri-Adapt, to support unsupervised domain adaptation research on speech recognition models. Built on top of the LibriSpeech corpus, Libri-Adapt contains English speech recorded on mobile and embedded-scale microphones, and spans 72 different domains that are representative of the challenging practical scenarios encountered by ASR models. More specifically, Libri-Adapt facilitates the study of domain shifts in ASR models caused by a) different acoustic environments, b) variations in speaker accents, c) heterogeneity in the hardware and platform software of the microphones, and d) a combination of the aforementioned three shifts. We also provide a number of baseline results quantifying the impact of these domain shifts on the Mozilla DeepSpeech2 ASR model.
description: 5 pages, Published at IEEE ICASSP 2020
Weyl Nodal Line-Surface Half-metal in CaFeO$_3$
Creators: name: Zhang, Run-Wu
name: Ma, Da-Shuai
name: Zhang, Jian-Min
name: Yao, Yugui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Manipulating the spin degrees of freedom of electrons affords an excellent platform for exploring novel quantum states in condensed-matter physics and material science. Based on first-principles calculations and analysis of crystal symmetries, we propose a fully spin-polarized composite semimetal state, which is combined with the one-dimensional nodal lines and two-dimensional nodal surfaces, in the half-metal material CaFeO$_3$. In the nodal line-surface states, the Baguenaudier-like nodal lines feature six rings linked together, which are protected by the three independent symmetry operations:$\mathcal{PT}$, $\mathcal{M}_{y}$, and $\mathcal{\widetilde{M}}_{z}$. Near the Fermi level, the spin-polarized nodal surface states are guaranteed by the joint operation $\mathcal{T}\mathcal{S}_{2i}$ in the $k_{i(i=x,y,z)}=π$ plane. Furthermore, high-quality CaFeO$_3$ harbors ultra-clean energy dispersion, which is rather robust against strong triaxial compressional strain and correlation effect. The realization of the Weyl nodal line-surface half-metal presents great potential for spintronics applications with high speed and low power consumption.
description: 5 figures + 1 table
Oceanic heat anomalies and Arctic sea-ice variability (D2.6)
Creators: name: Herbaut, Christophe
name: Houssais, Marie-Noelle
Publisher: name: Zenodo
Year: 2019

description: In this deliverable we have investigated the link between the ocean heat transport and the sea ice properties (extent, thickness). Observations and climate model simulations of the last decades and in a future climate scenario have been used to explore how the variations of the sea ice cover in the Arctic can be predicted months or years in advance from the ocean surface temperature. The winter Arctic sea ice extent could be predicted with some confidence from the sea surface temperature (SST) in the northern North Atlantic several years in advance. Looking at more local scale, the ice cover can be predicted one or two years in advance in all the marginal seas of the Arctic in the Norwegian climate
 model, when the observed SST is imposed in the model. Regarding the prediction from seasons to seasons, the result is more contrasted and the best predictions are obtained in the Barents Sea.
 Prediction of the sea ice cover in this region from oceanic quantities should hold in future climate as well.
 A particular attention was paid to the mechanisms controlling the regional link between sea‐ice and the ocean temperature north of Svalbard, a region of the Arctic where the warm water of Atlantic origin encounters sea‐ice. In this area we examined if the variations of the heat content of the ocean can be associated with variations of the volume of warm water rather than variations of the water temperature itself. Examining a one‐month duration event of sea ice retreat in the 2006 winter, one of the major events in the last two decades, we could show that wind anomalies were a major driver of the sea‐ice opening, contributing altogether to the offshore retreat of the sea ice edge and enhanced ice melt through upwelling of warm water to surface.
description: The Blue‐Action project has received funding from the European Union's Horizon 2020 Research and Innovation Programme under Grant Agreement No 727852.
Clusterization transition between cluster Mott insulators on a breathing Kagomé lattice
Creators: name: Yao, Xu-Ping
name: Zhang, Xiao-Tian
name: Kim, Yong Baek
name: Wang, Xiaoqun
name: Chen, Gang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Motivated by recent experimental progress on various cluster Mott insulators, we study an extended Hubbard model on a breathing Kagomé lattice with a single electron orbital and $1/6$ electron filling. Two distinct types of cluster localization are found in the cluster Mott regime due to the presence of the electron repulsion between neighboring sites, rather than from the on-site Hubbard interaction in the conventional Mott insulators. We introduce a unified parton construction framework to accommodate both type of cluster Mott insulating phase as well as a trivial Ferm liquid metal and discuss the phase transitions in the phase diagram. It is shown that, in one of the cluster localization phases, the strong inter-site repulsion results into locally metallic behavior within one of two triangular clusters on the breathing Kagomé lattice. We further comment on experimental relevance to existing Mo-based cluster magnets.
description: 9 pages, 3 figures. Abstracted partly from arXiv:1408.1963
Homology of perfect complexes
Creators: name: Avramov, L. L.
name: Buchweitz, R. -O.
name: Iyengar, S. B.
name: Miller, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Commutative Algebra (math.AC)
subject: K-Theory and Homology (math.KT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 13D02, 13D22, 13D09 (primary) 13H10, 18E30, 19J35 (secondary)

description: It is proved that the sum of the Loewy lengths of the homology modules of a finite free complex F over a local ring R is bounded below by a number depending only on R. This result uncovers, in the structure of modules of finite projective dimension, obstructions to realizing R as a closed fiber of some flat local homomorphism. Other applications include, as special cases, uniform proofs of known results on free actions of elementary abelian groups and of tori on finite CW complexes. The arguments use numerical invariants of objects in general triangulated categories, introduced here and called levels. They allow one to track, through changes of triangulated categories, homological invariants like projective dimension, as well as structural invariants like Loewy length. An intermediate result sharpens, with a new proof, the New Intersection Theorem for commutative algebras over fields. Under additional hypotheses on the ring $R$ stronger estimates are proved for Loewy lengths of modules of finite projective dimension.
description: This version corrects an error in the statement (and proof) of Theorem 7.4 in the published version of the paper [Adv. Math. 223 (2010) 1731--1781]. These changes do not affect any other results or proofs in the paper. A corrigendum has been submitted.
Making frugal innovations more inclusive by embracing complexity
Creators: name: Kersten, W.C.
name: Diehl, J.C.
name: van Engelen, J.M.L.
Publisher: name: Zenodo
Year: 2019
Subjects: frugal innovation
inclusiveness
shared design space
complexity
adaptive
interconnections
design

description: Frugal innovation and inclusive innovation are increasingly popular concepts. We argue that an approach that embraces complexity can help to support effective use of both, even though this seems at odds with the aura of simplicity that surrounds frugal innovation. The approach revolves around involving insights from stakeholders from different contexts early on in the innovation process before making the crucial choices that strongly influence the next steps. We show examples how this approach positively affects inclusiveness on process level as well as inclusiveness of the outcomes, while not making the innovation itself more complex or resource-rich. We recommend using the approach in more settings to further verify its potential.
description: Academically peer-reviewed
Baryogenesis via left-right asymmetry generation by Affleck-Dine mechanism in Dirac neutrino model
Creators: name: Senami, Masato
name: Takayama, Tsutomu
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A baryogenesis scenario in supersymmetric standard models with Dirac neutrinos proposed by Abel and Page is reconsidered with introducing intermediate scale physics to stabilize the runaway potential along a right-handed sneutrino direction. In contrary with previous results, the baryon number asymmetry can be explained even for higher reheating temperature without entropy production if the lightest neutrino mass is small and/or thermal effects induce early oscillation. We discuss the solution to the problem of dark matter overproduction by the right-handed sneutrino decay by SU(2)_R gauge interaction.
description: 28 pages, 9 figures, references added
Period polynomials and Ihara brackets
Creators: name: Luque, Jean-Gabriel
name: Novelli, Jean-Christophe
name: Thibon, Jean-Yves
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Schneps [J. Lie Theory 16 (2006), 19--37] has found surprising links between Ihara brackets and even period polynomials. These results can be recovered and generalized by considering some identities relating Ihara brackets and classical Lie brackets. The period polynomials generated by this method are found to be essentially the Kohnen-Zagier polynomials.
description: 12 pages, LaTEX
Resurgence in Lorentzian quantum cosmology: No-boundary saddles and resummation of quantum gravity corrections around tunneling saddle points
Creators: name: Honda, Masazumi
name: Matsui, Hiroki
name: Okabayashi, Kazumasa
name: Terada, Takahiro
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We revisit the path-integral approach to the wave function of the Universe by utilizing Lefschetz thimble analyses and resurgence theory. The traditional Euclidean path-integral of gravity has the notorious ambiguity of the direction of Wick rotation. In contrast, the Lorentzian method can be formulated concretely with the Picard-Lefschetz theory. Yet, a challenge remains: the physical parameter space lies on a Stokes line, meaning that the Lefschetz-thimble structure is still unclear. Through complex deformations, we resolve this issue by uniquely identifying the thimble structure. This leads to the tunneling wave function, as opposed to the no-boundary wave function, offering a more rigorous proof of the previous results. Further exploring the parameter space, we discover rich structures: the ambiguity of the Borel resummation of perturbative series around the tunneling saddle points is exactly canceled by the ambiguity of the contributions from no-boundary saddle points. This indicates that resurgence also works in quantum cosmology, particularly in the minisuperspace model.
description: 14 pages, 7 figures, v3: we corrected minor typos in equations in the introduction and Section. IV
Exploiting Network Topology for Accelerated Bayesian Inference of Grain Surface Reaction Networks
Creators: name: Heyl, Johannes
name: Viti, Serena
name: Holdship, Jonathan
name: Feeney, Stephen M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In the study of grain-surface chemistry in the interstellar medium, there exists much uncertainty regarding the reaction mechanisms with few constraints on the abundances of grain-surface molecules. Bayesian inference can be performed to determine the likely reaction rates. In this work, we consider methods for reducing the computational expense of performing Bayesian inference on a reaction network by looking at the geometry of the network. Two methods of exploiting the topology of the reaction network are presented. One involves reducing a reaction network to just the reaction chains with constraints on them. After this, new constraints are added to the reaction network and it is shown that one can separate this new reaction network into sub-networks. The fact that networks can be separated into sub-networks is particularly important for the reaction networks of interstellar complex organic molecules, whose surface reaction networks may have hundreds of reactions. Both methods allow the maximum-posterior reaction rate to be recovered with minimal bias.
Constraints on Holographic Dark Energy from Latest Supernovae, Galaxy Clustering, and Cosmic Microwave Background Anisotropy Observations
Creators: name: Zhang, Xin
name: Wu, Feng-Quan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The holographic dark energy model is proposed by Li as an attempt for probing the nature of dark energy within the framework of quantum gravity. The main characteristic of holographic dark energy is governed by a numerical parameter $c$ in the model. The parameter $c$ can only be determined by observations. Thus, in order to characterize the evolving feature of dark energy and to predict the fate of the universe, it is of extraordinary importance to constrain the parameter $c$ by using the currently available observational data. In this paper, we derive constraints on the holographic dark energy model from the latest observational data including the gold sample of 182 Type Ia supernovae (SNIa), the shift parameter of the cosmic microwave background (CMB) given by the three-year {\it Wilkinson Microwave Anisotropy Probe} ({\it WMAP}) observations, and the baryon acoustic oscillation (BAO) measurement from the Sloan Digital Sky Survey (SDSS). The joint analysis gives the fit results in 1-$σ$: $c=0.91^{+0.26}_{-0.18}$ and $Ω_{\rm m0}=0.29\pm 0.03$. That is to say, though the possibility of $c<1$ is more favored, the possibility of $c>1$ can not be excluded in one-sigma error range, which is somewhat different from the result derived from previous investigations using earlier data. So, according to the new data, the evidence for the quintom feature in the holographic dark energy model is not as strong as before.
description: 22 pages, 8 figures; accepted for publication in Phys. Rev. D
Υγιεινές- ανθυγιεινές συμπεριφορές, ψυχική υγεία και εστίες ελέγχου συμπεριφορών υγείας.:
Creators: name: Βράκα, Ασημίνα Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Διατροφή
Ασκηση
Ψυχική υγεία
Nutrition
Exercise
General health

description: Η υιοθέτηση ενός υγιεινού τρόπου ζωής είναι το κλειδί για την υγεία, την ευεξία και την ευρωστία. Ωστόσο, πολλοί άνθρωποι δεν μπορούν να αλλάξουν αποτελεσματικά τον τρόπο ζωής τους, ακόμη και αν θέλουν. Σκοπός της παρούσας μελέτης ήταν να εξετάσει τις διαφορές ενηλίκων, ηλικίας 18-63 ετών, στην περιοχή της Λάρισας, σε υγιεινές /ανθυγιεινές συμπεριφορές, ως προς την ηλικία, το φύλο, το μορφωτικό επίπεδο, την οικογενειακή κατάσταση και τον δείκτη μάζας σώματος. Οι συμπεριφορές που θα αξιολογηθούν είναι το κάπνισμα, η άσκηση, το αλκοόλ, και η διατροφή. Στη μελέτη συμμετείχαν 310 άτομα ηλικίας 18-63 ετών, τα οποία συμπλήρωσαν ένα ερωτηματολόγιο που αφορούσε το κάπνισμα, την άσκηση, το αλκοόλ, την διατροφή, την ψυχική υγεία και τις εστίες ελέγχου συμπεριφορών υγείας. Όσο αναφορά τα αποτελέσματα παρατηρήθηκαν σημαντικές διαφορές σε όλες τις μετρήσεις ανά ηλικία, φύλο, μορφωτικό επίπεδο, οικογενειακή κατάσταση και δείκτη μάζας σώματος. Η υιοθέτηση μιας συμπεριφοράς υγείας, φαίνεται να σχετίζεται με την ταυτόχρονη υιοθέτηση και άλλων συμπεριφορών υγείας καθώς επίσης και η υιοθέτηση υγιεινών ή μη συμπεριφορών των ατόμων φαίνεται να επηρεάζεται από παράγοντες που αφορούν σε χαρακτηριστικά όπως η ηλικία, το φύλο, η οικογενειακή κατάσταση, το μορφωτικό επίπεδο και ο δείκτης μάζας σώματος, αλλά και από ψυχολογικά χαρακτηριστικά όπως οι εστίες ελέγχου συμπεριφοράς.
description: Leading a healthy life style is the key to health, well-being and welfare. However a lot of people are not able to change effectively their way of life, even if they want it. The purpose of the present study was to test the differences among adults, in Larissa, concerning healthy /unhealthy behaviors, in view of age, sex, educational level, marital status and body mass index. The behaviors which were examined were the following: smoking, exercise, alcohol and nutrition. 310 people, aged between 18 to 63 years old, participated in the study by answering a questionnaire regarding smoking, exercise, alcohol, nutrition, mental health and health locus of control. Concerning the results, important differences were noticed in every measurement per age, sex, educational level, marital status and body mass index. The adoption of healthy behavior, seems to be relative to the simultaneous adoption of some other health behaviors and also the adoption of healthy or unhealthy behaviors, seems to be affected by factors such as people’s age, sex marital status, educational level and body mass index, as well as, by individuals mental characteristics, such as general health and locus of control regarding behavior.
Free energy variational approach for the classical anisotropic XY model in a crystal field
Creators: name: Castro, L. M.
name: Pires, A. S. T.
name: Plascak, J. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A variational approach for the free energy is used to study the three-dimensional anisotropic XY model in the presence of a crystal field. The magnetization and the phase diagrams as a function of the parameters of the Hamiltonian are obtained. Some limiting results for isotropic XY and planar rotator models in two and three dimensions are analyzed and compared to previous results obtained from analytical approximations as well as from those obtained from more reliable approaches such as series expansion and Monte Carlo simulations. It is also shown that from this general variational approach some simple assumptions can drastically simplify the self-consistent implicit equations. The validity of the low temperature region of this approach is analyzed and compared to Monte Carlo results as well.
description: 9 pages, 5 figures, 1 table
LOFAR observations of galaxy clusters in HETDEX
Creators: name: van Weeren, R. J.
name: Shimwell, T. W.
name: Botteon, A.
name: Brunetti, G.
name: Brüggen, M.
name: Boxelaar, J. M.
name: Cassano, R.
name: Di Gennaro, G.
name: Andrade-Santos, F.
name: Bonnassieux, E.
name: Bonafede, A.
name: Cuciti, V.
name: Dallacasa, D.
name: de Gasperin, F.
name: Gastaldello, F.
name: Hardcastle, M. J.
name: Hoeft, M.
name: Kraft, R . P.
name: Mandal, S.
name: Rossetti, M.
name: Röttgering, H. J. A.
name: Tasse, C.
name: Wilber, A. G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Diffuse cluster radio sources, in the form of radio halos and relics, reveal the presence of cosmic rays and magnetic fields in the intracluster medium (ICM). These cosmic rays are thought to be (re-)accelerated through ICM turbulence and shock waves generated by cluster merger events. Here we characterize the presence of diffuse radio emission in known galaxy clusters in the HETDEX Spring Field, covering 424 deg$^2$. For this, we developed a method to extract individual targets from LOFAR observations processed with the LoTSS DDF-pipeline. This procedure enables improved calibration and joint imaging and deconvolution of multiple pointings of selected targets. The calibration strategy can also be used for LOFAR Low-Band Antenna (LBA) and international-baseline observations. The fraction of Planck PSZ2 clusters with any diffuse radio emission apparently associated with the ICM is $73\pm17\%$. We detect a total of 10 radio halos and 12 candidate halos in the HETDEX Spring Field. Five clusters host radio relics. The fraction of radio halos in Planck PSZ2 clusters is $31\pm11\%$, and $62\pm15\%$ when including the candidate radio halos. Based on these numbers, we expect that there will be at least $183 \pm 65$ radio halos found in the LoTSS survey in PSZ2 clusters, in agreement with predictions. The integrated flux densities for the radio halos were computed by fitting exponential models to the radio images. From these flux densities, we determine the cluster mass (M$_{500}$) and Compton Y parameter (Y$_{500}$) 150 MHz radio power (P$_{\rm{150 MHz}}$) scaling relations for Planck PSZ2-detected radio halos. We find that the slopes of these relations are steeper than those determined from the 1.4 GHz radio powers. However, considering the uncertainties this is not a statistically significant result.
description: submitted, 35 pages and 45 figures
On Proximity Measures for Graph Vertices
Creators: name: Chebotarev, Pavel
name: Shamis, Elena
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: Data Structures and Algorithms (cs.DS)
subject: Networking and Internet Architecture (cs.NI)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05C50; 05C05; 15A09; 15A51

description: We study the properties of several proximity measures for the vertices of weighted multigraphs and multidigraphs. Unlike the classical distance for the vertices of connected graphs, these proximity measures are applicable to weighted structures and take into account not only the shortest, but also all other connections, which is desirable in many applications. To apply these proximity measures to unweighted structures, every edge should be assigned the same weight which determines the proportion of taking account of two routes, from which one is one edge longer than the other. Among the proximity measures we consider path accessibility, route accessibility, relative forest accessibility along with its components, accessibility via dense forests, and connection reliability. A number of characteristic conditions is introduced and employed to characterize the proximity measures. A topological interpretation is obtained for the Moore-Penrose generalized inverse of the Laplacian matrix of a weighted multigraph.
description: 17 pages, 3 figures
Restrictions of the Complementary Series of the Universal Covering of the Symplectic Group
Creators: name: He, Hongyu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Representation Theory (math.RT)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 22E

description: We study the restrictions of certain degenerate principal series representations of the universal covering of the symplectic group. We construct an isometry between the complementary series and the unitary principal series which preserves the action of a symplectic subgroup no bigger than half of the size of the original group.
description: 15 pages, 1 figure (not included due to technical difficulties with arxiv.org)
The deployment of the ICARUS LAr detector on the short baseline (SBN) neutrino beam at FNAL
Creators: name: Bonesini, M.
name: Menegolli, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Icarus T600 detector represents the first example of a fully working large-mass LAr detector. After operations at the LNGS INFN laboratories, it has been refurbished at CERN in 2015-2017 and then installed as far detector on the BNB neutrino beamline at FNAL. The main operations involved in the T600 overhauling are thouroghly described in this paper.
description: contribution to European Physical Society Conference on High Energy Physics - EPS-HEP2019 10-17 July, 2019 Ghent, Belgium}
Εκφάνσεις της γυναικείας φύσης στο μυθικό και τελετουργικό θέατρο της Μαργαρίτας Λυμπεράκη:
Creators: name: Γεωργίου, Νατάσα Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Μαργαρίτα Λυμπεράκη
Θεάτρο
Φεμινισμός
Margarita Lymperaki
Theater
Feminism

description: Η συγκεκριμένη εργασία αφορά στη φύση των γυναικών που συναντούμε στα μυθικό και τελετουργικό θέατρο της Μαργαρίτας Λυμπεράκη. Ουσιαστικά πρόκειται για σκηνικές γυναίκες, γυναίκες που ανήκουν στο χώρο του μύθου και λειτουργούν ως αρχέτυπα. Το σημαντικό στοιχείο που συνδέει όλες τις ηρωίδες της Λυμπεράκη είναι η έννοια του περάσματος...το "πέρασμα" -με την έννοια της διαβατήριας τελετής περισσότερο- της γυναίκας: από ερωμένη γίνεται μάνα, από αντικείμενο του πόθου θύτης. Η διαδρομή αυτή, ο σημασία του μύθου και η χρήση της τελετουργίας είναι οι βασικοί άξονες της εργασίας.
description: This paper concerns in the nature of women in mythical and ritual theatre of Margarita Lymperaki. Substantially they are scenic women, women that belong in the space of myth and they function as archetypes. The important element that connects all the women-heroes in Lymperaki’s theatre is the significance of passage…a woman from lover becomes mother, from object of desire immolator. This way, the importance of myth and the use of ritual are the main axes of this paper.
Low-Temperature 2D/2D Ohmic Contacts in WSe$_2$ Field-Effect Transistors as a Platform for the 2D Metal-Insulator Transition
Creators: name: Stanley, L. J.
name: Chuang, Hsun-Jen
name: Zhou, Zhixian
name: Koehler, M.
name: Yan, J.
name: Mandrus, D.
name: Popović, Dragana
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the fabrication of hexagonal-boron-nitride (hBN) encapsulated multi-terminal WSe$_2$ Hall bars with 2D/2D low-temperature Ohmic contacts as a platform for investigating the two-dimensional (2D) metal-insulator transition. We demonstrate that the WSe$_2$ devices exhibit Ohmic behavior down to 0.25 K and at low enough excitation voltages to avoid current-heating effects. Additionally, the high-quality hBN-encapsulated WSe$_2$ devices in ideal Hall-bar geometry enable us to accurately determine the carrier density. Measurements of the temperature ($T$) and density ($n_s$) dependence of the conductivity $σ(T,n_s)$ demonstrate scaling behavior consistent with a metal-insulator quantum phase transition driven by electron-electron interactions, but where disorder-induced local magnetic moments are also present. Our findings pave the way for further studies of the fundamental quantum mechanical properties of 2D transition metal dichalcogenides using the same contact engineering.
description: 25 pages, 5 figures + Supporting Information (4 pages, 3 figures)
Irreconcilable differences?: idealism, realism and the problem of discipline in international relations
Creators: name: Crawford, Robert Michael
Publisher: name: University of British Columbia
Year: 2009

description: This thesis accepts the premise that something is amiss in international political theory but, in contrast to numerous recent works, aims to provide more than a eulogy, lament, or nostalgic retrospective on the field. Instead, it seeks to get at the root cause of the problem. I argue that the perennial malaise of international theory is a problem of discipline, in both the ordinary and scientific sense. First, the field is in the grip of unprecedented theoretical tumult, its practitioners in danger of drifting out of familiar currents into a boundless sea of relativism. Second, the scientific status of the discourse remains an issue of concern to many scholars. But the first group of "theorists" promise us little more than diversity, while the second look for theoretical shelter in the false haven of empirical science. The crisis of international theory is thus inflamed by a misrepresented debate in which either too much emphasis is placed on consensus, or too great a virtue made of difference. Returning to the insights of E. H. Carr, I reconceptualize the problem of theoretical consensus in international relations as an issue that is inherently irresolvable and, at the same time, workable. The thesis argues against the view that international relations cannot achieve secure status as a discipline without attaining, or at least aspiring to construct, a global empirical theory. Following Carr, I argue that there are deep and enduring differences in international theory, differences that can always be counted on to undermine the "panacea of a global explanatory theory" (Hoffmann, 1960). These differences are traced, via Carr, to a basic antithesis deriving from the contrasting requirements and standards of normative and empirical theory. By the same token, however, I argue that differences that are irreconcilable on their own theoretical terms can be reconciled within the broader ambit of discipline, provided that the latter is understood as a community of scholars united by basic human interests — the avoidance of war for example — and not as a field of study amenable to the canons of science. To demonstrate the argument, I undertake a study of neoliberalism, focusing in particular on international regimes. I focus on neoliberalism because it is the heir apparent to realism, and on regime theorists because of their explicit attempt to reconcile idealist and realist perspectives. My critique of these approaches concentrates on their open agenda to synthesize realist and liberal international theory. I conclude that regime theory, as it is conceived by neoliberals, disguises, but ultimately founders, on the irreconcilable theoretical differences identified by Carr.
FINLANDIYA TAJRIBASI – BOSHLANG'ICH TA'LIM TIZIMI SOHASIDAGI ISLOHOTLAR ASOSI
Creators: name: To'rayeva, Sojida
Publisher: name: Zenodo
Year: 2024

description: Bugungi kunda ta’lim sohasida mavjud bo’lgan ba’zi kamchiliklarni bartaraf etishda chet el tajribasidan foydalanishimiz zarur. Chet el tajribasini o’ganish shuni ko’rsatdiki, Finlandiya ta’lim tizimi, ayniqsa boshlang’ich ta’lim sohasidagi tajribasi nihoyatda beqiyos. Dunyoning bir qator yetakchi davlatlari ta’lim tizimini isloh qilishda Finlandiya tajribasidan foydalanib kelmoqdalar. O’zbekistondagi boshlangich ta’lim tizimini Finlandiya tajribasidan foydalangan holda isloh qilish ta’lim samaradorligini oshirishga yordam beradi.
Particle vs. future event horizon in interacting holographic dark energy model
Creators: name: Sadjadi, H. Mohseni
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: By choosing the future event horizon as the horizon of the flat FLRW universe, we show that although the interacting holographic dark energy model is able to explain the phantom divide line crossing, but the thermodynamics second law is not respected in this model. We show that if one takes the particle event horizon as the horizon of the universe, besides describing $ω=-1$ crossing in a consistent way with thermodynamics second law, he is able to determine appropriately the ratio of dark matter to dark energy density at transition time. In this approach, after the first transition from quintessence to phantom, there is another transition from phantom to quintessence phase which avoids the big rip singularity.
description: 12 pages, 2 figures, references added, abstract changed, typos corrected. To be published in JCAP