cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optimizing Jastrow factors for the transcorrelated method
Creators: name: Haupt, J. Philip
name: Hosseini, Seyed Mohammadreza
name: Rios, Pablo Lopez
name: Dobrautz, Werner
name: Cohen, Aron
name: Alavi, Ali
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We investigate the optimization of flexible tailored real-space Jastrow factors for use in the transcorrelated (TC) method in combination with highly accurate quantum chemistry methods such as initiator full configuration interaction quantum Monte Carlo (FCIQMC). Jastrow factors obtained by minimizing the variance of the TC reference energy are found to yield better, more consistent results than those obtained by minimizing the variational energy. We compute all-electron atomization energies for the challenging first-row molecules C2 , CN, N2 , and O2 and find that the TC method yields chemically accurate results using only the cc-pVTZ basis set, roughly matching the accuracy of non-TC calculations with the much larger cc-pV5Z basis set. We also investigate an approximation in which pure three-body excitations are neglected from the TC-FCIQMC dynamics, saving storage and computational cost, and show that it affects relative energies negligibly. Our results demonstrate that the combination of tailored real-space Jastrow factors with the multi-configurational TC-FCIQMC method provides a route to obtaining chemical accuracy using modest basis sets, obviating the need for basis-set extrapolation and composite techniques.
description: Submitted to J Chem Phys
Production of lattice gauge-Higgs topological states in measurement-only quantum circuit
Creators: name: Kuno, Yoshihito
name: Ichinose, Ikuo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: By imaginary-time evolution with Hamiltonian, an arbitrary state arrives in the system's ground state. In this work, we conjecture that this dynamics can be simulated by measurement-only circuit (MoC), where each projective measurement is set in a suitable way. Based on terms in the Hamiltonian and ratios of their parameters (coefficients), we propose a guiding principle for the choice of the measured operators called stabilizers and also the probability of projective measurement in the MoC. In order to examine and verify this conjecture of the parameter ratio and probability ratio correspondence in a practical way, we study a generalized (1+1)-dimensional $Z_2$ lattice gauge-Higgs model, whose phase diagram is very rich including symmetry-protected topological phase, deconfinement phase, etc. We find that the MoC constructed by the guiding principle reproduces phase diagram very similar to that of the ground state of the gauge-Higgs Hamiltonian. The present work indicates that the MoC can be broadly used to produce interesting phases of matter, which are difficult to be simulated by ordinary Hamiltonian systems composed of stabilizer-type terms.
description: 14 pages, 9 figures, Physical Review B accepted version
Experimental Summary: Very High Energy Cosmic Rays and their Interactions
Creators: name: Kampert, Karl-Heinz
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The XVII International Symposium on Very High Energy Cosmic Ray Interactions, held in August of 2012 in Berlin, was the first one in the history of the Symposium, where a plethora of high precision LHC data with relevance for cosmic ray physics was presented. This report aims at giving a brief summary of those measurements and it discusses their relevance for observations of high energy cosmic rays. Enormous progress has been made also in air shower observations and in direct measurements of cosmic rays, exhibiting many more structure in the cosmic ray energy spectrum than just a simple power law with a knee and an ankle. At the highest energy, the flux suppression may not be dominated by the GZK-effect but by the limiting energy of a nearby source or source population. New projects and application of new technologies promise further advances also in the near future. We shall discuss the experimental and theoretical progress in the field and its prospects for coming years.
description: Experimental Summary of ISVHECRI Conference, Berlin, August 2012, 10 pages, 13 figures, to appear in EPJ web of Conf; Update of References 1 & 2
title: Επίλυση του προβλήματος δρομολόγησης αποθεμάτων με χρήση του αλγορίθμου βελτιστοποίησης σμήνους σωματιδίων
Creators: name: Δαφέρμος Στέλιος
Publisher: name: Technical University of Crete
Year: 2012

description: Μη διαθέσιμο
title: The palaeontology of Ediacaran Avalonia: new insights using morphometrics and multivariate statistical analyses
Creators: name: Hawco, Jessica Bernadette
Publisher: name: Memorial University of Newfoundland
Year: 2020

description: The Avalonian Ediacaran fossil assemblage of Newfoundland, Canada contains abundant
 fossils with a wide range of morphologies and preservational styles. Quantitative
 morphological and statistical analysis in Ediacaran fossil assemblages has recently been
 used to recognize natural morphological groupings, providing evidence for variability
 within and between taxa.
 This approach is first used herein to test the grouping of the serially arranged, millimeterscale
 chambered organism known as Palaeopascichnus. The combined morphometric and
 statistical analytical approach was applied to collected specimens from Ferryland, and
 demonstrates constrained, discrete growth patterns. The same technique was used to
 compare fossil palaeopascichnids with extant Protista, which has supported the protistan
 affinity for the hitherto enigmatic palaeopascichnids.
 This thesis also statistically investigates an Ediacaran taxonomic dispute known as the
 Beothukis/Culmofrons problem. The two taxa (Beothukis mistakensis and Culmofrons
 plumosa) were established separately, but were later synonymized. To determine the
 validity of this taxonomic reassignment, this thesis investigates the clustering of specimens
 based on their morphology and morphometrics and assesses the validity of certain
 taxonomic characters within the specimen dataset. These findings validate the original
 genus-level differentiation of Beothukis and Culmofrons, while also showing evidence for
 previously unrecognized variation within the genus Beothukis. Overall, this technique has
 led to the finding that more morphotypes may exist within the Ediacaran biota than
 originally thought, and proves the utility of detailed statistical and morphological analysis
 in determining morphological diversity and disparity.
title: Προσρόφηση ΝΗ4 + από υδατικό διάλυμα σε απόβλητα εκκόκκισης βαμβακιού μετά από πλύση και πολυκριτήρια ανάλυση για την επιλογή του βέλτιστου στην επιλογή τρόπων αποφόρτισης στραγγισμάτων
Creators: name: Πλιάσσας Ελευθέριος
Publisher: name: Technical University of Crete
Year: 2012

description: Μη διαθέσιμο
Vignettes of two Confederate officers and Portraits of Carlo Venturi and Emilie Ashurst Venturi
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Armed Forces--Officers
Husband and wife

description: four images: at top vignettes of two Confederate officers, "Thomson, a Virgin[ia]n : writer, ex-Volunteer, &c"; "another Virgin[ia]n, ex- &c"; "Madame Venturi (born Ashhurst)"; "Venturi & wife"
Additional file 2 of The effect of zinc supplementation on anthropometric measurements in healthy children over two years: a systematic review and meta-analysis
Creators: name: Monfared, Vahid
name: Salehian, Adel
name: Nikniaz, Zeinab
name: Ebrahimpour-Koujan, Soraiya
name: Faghfoori, Zeinab
Publisher: name: figshare
Year: 2023
Subjects: Medicine
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Science Policy

description: Supplementary Material 2
title: Επίδραση των συνθηκών κατεργασίας στις αναπτυσσόμενες δυνάμεις κοπής στο φραιζάρισμα με κύλιση οδοντώσεων
Creators: name: Μαμμάς Ανδρέας
Publisher: name: Technical University of Crete
Year: 2012

description: Μη διαθέσιμο
Thin monodromy in Sp(4)
Creators: name: Brav, Christopher
name: Thomas, Hugh
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We show that some hypergeometric monodromy groups in Sp(4,Z) split as free or amalgamated products and hence by cohomological considerations give examples of Zariski dense, non-arithmetic monodromy groups of real rank 2. In particular, we show that the monodromy of the natural quotient of the Dwork family of quintic threefolds in P^{4} splits as Z*Z/5. As a consequence, for a smooth quintic threefold X we show that a certain group of autoequivalences of the bounded derived category of coherent sheaves is an Artin group of dihedral type.
title: Προσομοίωση σύνθετων πιεζοηλεκτρικών υλικών με τη μέθοδο των πεπερασμένων στοιχείων
Creators: name: Δρακόπουλος Μεταξάς
Publisher: name: Technical University of Crete
Year: 2012

description: Μη διαθέσιμο
title: Πυρόλυση/αεριοποίηση διαφόρων τύπων βιομάζας. Κινητική μελέτη, χαρακτηρισμός αέριων προϊόντων και τεφρών
Creators: name: Παζάρα Ευγενία
Publisher: name: Technical University of Crete
Year: 2014

description: Μη διαθέσιμο
Anchored advected interfaces, Oslo model, and roughness at depinning
Creators: name: Shapira, Assaf
name: Wiese, Kay Joerg
Publisher: name: arXiv
Year: 2023
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: There is a plethora of 1-dimensional advected systems with an absorbing boundary: the Toom model of anchored interfaces, the directed exclusion process where in addition to diffusion particles and holes can jump over their right neighbor, simple diffusion with advection, and Oslo sandpiles. All these models share a roughness exponent of $ζ=1/4$, while the dynamic exponent $z$ varies, depending on the observable. We show that for the first three models $z=1$, $z=2$, and $z=1/2$ are realized, depending on the observable. The Oslo model is apart with a conjectured dynamic exponent of $z=10/7$. Since the height in the latter is the gradient of the position of a disordered elastic string, this shows that $ζ=5/4$ for a driven elastic string at depinning.
description: 20 pages, 17 figures
GEOFFREY BURNSTOCK - Bibliography from GEOFFREY BURNSTOCK. 10 May 1929 — 3 June 2020
Creators: name: Alan North, R.
name: Costa, Marcello
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Physiology
subject: FOS: Biological sciences

description: Geoffrey Burnstock was a biomedical scientist who gained renown for his discovery that adenosine 5′-triphosphate (ATP) functions as an extracellular signalling molecule. Born in London and educated at King's and University colleges, he did postdoctoral work at Mill Hill and Oxford. He moved in 1959 to the Department of Zoology at the University of Melbourne because he sensed there a greater freedom to challenge established thinking in physiology. His group found that transmission from sympathetic and parasympathetic autonomic nerves to smooth muscle was in some places not mediated by the accepted chemical messengers (noradrenaline and acetylcholine). He amassed evidence that ATP was this non-adrenergic, non-cholinergic transmitter, using biochemical, histological and electrophysiological approaches: heretically, he styled this ‘purinergic transmission’. Geoff further upset dogma in the 1970s by proposing ‘co-transmission’ in which some nerves released ATP in addition to either noradrenaline or acetylcholine. He distinguished pharmacologically P1 receptors (activated best by adenosine and blocked by xanthines) and P2 receptors (activated best by purine nucleotides such as ATP) and he proposed in 1985 that the latter embraced P2X (ion channel) and P2Y (G protein-coupled) subtypes: about 10 years later these categories were substantiated by cDNA cloning. From 1975 until his retirement in 1997, Geoff was head of the Department of Anatomy and Embryology at University College London (UCL), which he developed energetically into a large and strong research department. Later, as head of the Autonomic Research Institute at the Royal Free (part of UCL), he continued to collaborate extensively, and founded several journals and international professional societies. He widely sought clinical benefit for his discoveries, and both P2X and P2Y receptors have been developed as the targets of useful therapeutics (gefapixant, clopidogrel). Geoff was proud of his modest, rather humble, background and eschewed formality. He may have smiled when his early discoveries were met with cynicism, even ridicule (‘pure-imagine’ transmission noted one amusing critic), but this just reinforced his resolve and encouraged his encyclopaedic oeuvre.
title: Αξιολόγηση και εφαρμογές γεωυλικών σε βιοκλιματική δόμηση και εξοικονόμηση ενέργειας
Creators: name: Σουλτανά Αθανασία Κ.
Publisher: name: Technical University of Crete
Year: 2014

description: Μη διαθέσιμο
Additional file 1 of Beyond lymphopenia, unraveling radiation-induced leucocyte subpopulation kinetics and mechanisms through modeling approaches
Creators: name: Pham, Thao-Nguyen
name: Coupey, Julie
name: Candeias, Serge M.
name: Ivanova, Viktoriia
name: Valable, Samuel
name: Thariat, Juliette
Publisher: name: figshare
Year: 2023
Subjects: subject: Biophysics
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Plant Biology

description: Additional file 1.
Breakdown of the Stokes-Einstein relation in two, three and four dimensions
Creators: name: Sengupta, Shiladitya
name: Karmakar, Smarajit
name: Dasgupta, Chandan
name: Sastry, Srikanth
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The breakdown of the Stokes-Einstein (SE) relation between diffusivity and viscosity at low temperatures is considered to be one of the hallmarks of glassy dynamics in liquids. Theoretical analyses relate this breakdown with the presence of heterogeneous dynamics, and by extension, with the fragility of glass formers. We perform an investigation of the breakdown of the SE relation in 2, 3 and 4 dimensions, in order to understand these interrelations. Results from simulations of model glass formers show that the degree of the breakdown of the SE relation decreases with increasing spatial dimensionality. The breakdown itself can be rationalized via the difference between the activation free energies for diffusivity and viscosity (or relaxation times) in the Adam-Gibbs relation in three and four dimensions. The behavior in two dimensions also can be understood in terms of a generalized Adam-Gibbs relation that is observed in previous work. We calculate various measures of heterogeneity of dynamics and find that the degree of the SE breakdown and measures of heterogeneity of dynamics are generally well correlated but with some exceptions. The two dimensional systems we study show deviations from the pattern of behavior of the three and four dimensional systems both at high and low temperatures. The fragility of the studied liquids is found to increase with spatial dimensionality, contrary to the expectation based on the association of fragility with heterogeneous dynamics.
Model for the propagation of fermions in a Bose-Einstein condensate
Creators: name: Nieves, José F.
name: Sahu, Sarira
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We consider the dispersion relations of fermions that propagate in the background of a scalar Bose-Einstein condensate. Some illustrative examples are discussed using simple Yukawa-type coupling models between the fermions and the scalar fields. The dispersion relations are determined explicitly in those cases, to the lowest order. The method also allows to determine the corrections to the dispersion relations due to the interactions with the excitations of the Bose-Einstein condensate. Possible applications of the results to the case of neutrinos are indicated.
description: 20 pages, one figure, To be published in Phys. Rev. D
Three Images: Kaalback's Frederick the Great, Possibly Miss Woolner, a Caricature, Drawn by Elizabeth Paulet "Notre Dame de Chelsea"
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Kings and rulers

description: three images: photograph of an engraving "Kaalback's Frederick the Great (not the least like) / 1864"; "Miss Woolner (?)"; a caricature, drawn by Elizabeth Paulet in 1844 "Notre Dame de Chelsea"
Five Images: In a Small Oval, an Elderly Man, Miss Hogarth, Miss Dickens, Jane Welsh Carlyle, Dr. Barnes
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Chairs
Men

description: Five images: in a small oval, an elderly man with white hair, bushy eyebrows, and beard, bearing a faint resemblance to Thomas Carlyle in old age; "Miss Hogarth, Dicken's sister-in-law"; "Miss Dickens?"; Jane Welsh Carlyle, faint, in oval "from a bad picture of her"; "Dr Barnes" [the elder]
Bericht über die Tätigkeit der Römisch-Germanischen Kommission vom 1. April 1937 bis 31. März 1938
Creators: name: Sprockhoff, Ernst
Publisher: name: Bericht der Römisch-Germanischen Kommission
Year: 2017

description: [nicht vorhanden / not available]
description: Bericht der Römisch-Germanischen Kommission, Bd. 27 (1937): Bericht der Römisch-Germanischen Kommission
Compactified extra dimension and entanglement island as clues to quantum gravity
Creators: name: Hung, Tran N.
name: Nam, Cao H.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that the compactified extra dimension and the emergence of the island can provide clues about quantum gravity because their combination can solve the deepest puzzles of black hole physics. Suppose that the time dimension and the extra dimension compactified on a circle are symmetric under \emph{double Wick rotation}, the curvature singularity would be removed due to the end of spacetime as a smooth bubble hidden behind the event horizon. The smooth bubble geometries can also be interpreted as microstates leading to the Bekenstein-Hawking entropy because the smooth bubble geometries live in the same region of mass and charge as the black string. In addition, by applying the quantum extremal surface prescription, we show the emergence of the island at late times of the black string evaporation where it is located slightly outside the event horizon. Due to the dominant contribution of the island configuration, the entanglement entropy of the radiation grows no longer linearly in time but it reaches a finite value that is twice the Bekenstein-Hawking entropy at the leading order. This transition shows the information preservation during the black string evaporation. Furthermore, we calculate the Page time which determines the moment of the transition between the linearly growing and constant behaviors of the entanglement entropy as well as the scrambling time corresponding to the information recovery time of the signal falling into the black string.
description: 25 pages, 5 figures
Additional file 1 of How disability severity is associated with changes in physical activity and inactivity from adolescence to young adulthood
Creators: name: Jung, Jihoon
name: Park, Seungyeon
name: Lee, Chung Gun
Publisher: name: figshare
Year: 2023
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Biotechnology
subject: Developmental Biology
subject: Cancer
subject: Science Policy

description: Additional file 1: Table 1. Questions used for collecting physicalactivity and physical inactivity in Wave 1 and Wave 4.
Analytical estimation of the Earth's magnetic field scale
Creators: name: Bologna, Mauro
name: Tellini, Bernardo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geophysics (physics.geo-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this paper we analytically estimate the magnetic field scale of planets with physical core conditions similar to that of Earth from a statistical point of view. We evaluate the magnetic field on the basis of the physical parameters of the center of the planet, such as density, temperature, and core size. We look at the contribution of the Peltier-Seebeck effect on the magnetic field, showing that an electrical thermal current can exist in a rotating fluid sphere. Finally, we apply our calculations to Earth and Jupiter. In each case we show that the thermal generation of currents leads to a magnetic field scale comparable to the observed fields of the two planets.
description: Published on Earth Moon and Planets
title: Σχεδίαση και βελτίωση λειτουργικών παραμέτρων πρωτότυπου συστήματος μετάδοσης κίνησης
Creators: name: Σπανουδάκης Πολυχρόνης
Publisher: name: Technical University of Crete
Year: 2013

description: Μη διαθέσιμο
title: Προσομοίωση της κατεργασίας της διάτρησης με πεπερασμένα στοιχεία λαμβάνοντας υπόψη τα δυναμικά φαινόμενα και βελτιστοποίηση των συνθηκών κοπής
Creators: name: Μπελής Ταξιάρχης Π.
Publisher: name: Technical University of Crete
Year: 2013

description: Μη διαθέσιμο
Nonadiabatic Dynamics Near Metal Surface With Periodic Drivings: A Floquet Surface Hopping Algorithm
Creators: name: Wang, Yu
name: Dou, Wenjie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We develop a Floquet surface hopping (FSH) approach to deal with nonadiabatic dynamics of molecules near metal surfaces subjected to time-periodic drivings from strong light-matter interactions. The method is based on a Floquet classical master equation (FCME) derived from a Floquet quantum master equation (FQME), followed by a Wigner transformation to treat nuclear motion classically. We then propose different trajectory surface hopping algorithms to solve the FCME. We find that a Floquet averaged surface hopping with electron density (FaSH-density) algorithm works the best as benchmarked with the FQME, capturing both the fast oscillations due to the driving as well as the correct steady state observables. This method will be very useful to study strong light-matter interactions with a manifold of electronic state.
description: 8 pages, 5 figures
Four images: Abraham Lincoln, John Wilkes Booth, Sir Charles Gavan Duffy Giuseppe Mazzini
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Presidents
Assassins
Actors

description: Four images: Abraham Lincoln; the world "and" between the photos, then, J.W. Booth "his assassin"; [Charles Gavan] "Duffy agn" [Elliott & Fry studio photo]; "Giu. Mazzini."
title: Mathematical and computational modeling for the generation and propagation of waves in marine and coastal environments
Creators: name: Καζολέα Μαρία
Publisher: name: Technical University of Crete
Year: 2013

description:  Introduction -- 2. Shallow water and Boussinesq-type (BT) equations -- 3. Numerical method in one dimension -- 4. Numerical test and results in one dimension -- 5. Finite volume methods on unstructured meshes -- 6. An unstructured FV scheme for BT equations -- 7. Numerical test and results in two dimensions
The dilute interacting Bose gas : comparisons between Feynman diagrammatic expansion and the hierarchy equations for the imaginary time Green functions
Creators: name: Dansage, Victor
name: Ballenegger, Vincent
name: Alastuey, Angel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We analyze the correspondence between two formalisms describing an interacting Bose gas, namely the standard Feynman diagrammatic expansion on the one hand, and the hierarchy equations for the imaginary-time Green functions on the other hand. We show that the Hartree-Fock approximation, as well as its first corrections at low density derived by Baym et al. [Eur. Phys. J. B, 24, pp. 107-124 (2001)], can be equivalently formulated in both formalisms. Within the hierarchy approach, the two-body correlations ${\mathcal G}^{(2,\rm T)}$ are expressed at lowest order in the interactions in terms of the full one-body Green function. This sheds light on the physical content of the corrections to the Hartree-Fock theory. Moreover, this representation of ${\mathcal G}^{(2,\rm T)}$ can be extended to higher orders, opening the way to systematic calculations of further corrections to the ideal critical temperature when the density increases.
Can I Tell You My Story? The Story Beyond the Stories: An Exploration into the Use of Autoethnography Within Cross-cultural Qualitative Research in Uganda, A Postcolonial Approach
Creators: name: Bunyan, Elle
Publisher: name: figshare
Year: 2021
Subjects: subject: Sociology
subject: FOS: Sociology
subject: 170110 Psychological Methodology, Design and Analysis
subject: FOS: Psychology
subject: 160807 Sociological Methodology and Research Methods
subject: 220304 Epistemology
subject: FOS: Philosophy, ethics and religion
subject: 200209 Multicultural, Intercultural and Cross-cultural Studies
subject: FOS: Other humanities
subject: 210310 Middle Eastern and African History
subject: FOS: History and archaeology

description: This methodological exploration engages critically with autoethnographic technique and scholarship, to examine and exemplify the value of autoethnography in enhancing qualitative inquiry within crosscultural research. Though encompassing a myriad of definitions and approaches, autoethnography represents both a process and a product, that seeks to describe and systematically analyse personal experiences (auto) in relation to their wider cultural (ethno) context, producing an account of this critical process (graphy) to enhance sociological understandings. However, there is debate and methodological polarisation among autoethnographers concerning the degree to which (re)presentations of the method (the product) should be explicitly analytical, whereby personal stories are embedded within specific theoretical framings, and relevant wider literature. Therefore, specifically; this piece examines and demonstrates the use of autoethnography as a methodological tool in facilitating enhanced critical reflection and understandings within the context of the researcher’s wider study in which she; a Scottish, white, self-funded PhD student, employed narrative interviews amongst other qualitative methods within a population of Ugandan children living within an orphanage in Kampala. Given Uganda’s geopolitical history of colonial oppression and ongoing semi-authoritarian rule, combined with the researcher’s positionality plus a decade of personal experiences before, and beyond formal fieldwork, this article demonstrates the use of autoethnography engaging a postcolonial lens to illuminate the sociocultural and historical systems of power, that that shape personal reality (ontology), the ways the experiential components of this reality are portrayed and therefore the constraints under which such portrayals can be interpreted (epistemology), for example within narratives or interviews. In doing so, the methodological value of a moderate approach to autoethnography is argued: that blends the human, heuristic value of personal experience as embodied knowledge with the scholarly affordances of theory and literature, showing how this method assists in situating one’s positionality and consequent influence within their research context; but offers words of critique and caution concerning the challenges of autoethnography.
title: Μέτρηση καταναλωτικών προτιμήσεων για προϊόντα ψωμιού: η περίπτωση ψωμί από αλεύρι βρώμης για τους Μύλους Κρήτης

Creators: name: Ρουμπεδακη Παναγιωτα-Μελα
Publisher: name: Technical University of Crete
Year: 2015

description: Η παρούσα διπλωματική εργασία πραγματεύεται τη μέτρηση καταναλωτικών προτιμήσεων για προϊόντα ψωμιού από αλεύρι βρώμης της εταιρείας Μύλοι Κρήτης. Στα πλαίσια της εργασίας πραγματοποιήθηκε έρευνα με συλλογή ερωτηματολογίων σε καταστήματα ΙΝΚΑ και φούρνους των Χανίων. Για την εκπόνηση της έρευνας εφαρμόστηκε η μέθοδος Choice-based Conjoint Analysis (CBC) με χρήση του λογισμικού της Sawtooth Software. Στη συνέχεια, έγινε ανάλυση  του προϊόντος ψωμί σε 2 χαρακτηριστικά (τιμή, είδος) και πραγματοποιήθηκε ανάλυση ευαισθησίας μέσω προσομοιωτή αγοράς για εξακρίβωση της πρόθεσης πληρωμής για το εκάστοτε είδος ψωμιού. Οι αναλύσεις συνδυάστηκαν και με τα δημογραφικά στοιχεία των ερωτηθέντων για την εξαγωγή συμπερασμάτων. Τέλος έγινε τμηματοποίηση αγοράς με χρήση του αλγορίθμου k-means πάνω στη σημαντικότητα που αποδίδουν οι καταναλωτές στα χαρακτηριστικά του προϊόντος. Για να γίνει η μέθοδος κατανοητή στον αναγνώστη έγινε προσπάθεια για αναλυτική περιγραφή της , στην εργασία παρουσιάζεται  η θεωρητική προσέγγιση της, η χρήση της , η διαδικασία , οι τύποι μεθοδολογιών αλλά και τα πλεονεκτήματα- μειονεκτήματα της.
The Face is Where the Nose is
Creators: name: Kohl, Jeanette
name: Olariu, Dominic
Publisher: name: kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften
Year: 2017

description: -
description: kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften, Bd. 40, Nr. 1 (2012): kritische berichte
Territorial Developments Based on Graffiti: a Statistical Mechanics Approach
Creators: name: Barbaro, Alethea B. T.
name: Chayes, Lincoln
name: D'Orsogna, Maria R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: 82B20, 82B26, 91D10, 91D20, 91D25

description: We study the well-known sociological phenomenon of gang aggregation and territory formation through an interacting agent system defined on a lattice. We introduce a two-gang Hamiltonian model where agents have red or blue affiliation but are otherwise indistinguishable. In this model, all interactions are indirect and occur only via graffiti markings, on-site as well as on nearest neighbor locations. We also allow for gang proliferation and graffiti suppression. Within the context of this model, we show that gang clustering and territory formation may arise under specific parameter choices and that a phase transition may occur between well-mixed, possibly dilute configurations and well separated, clustered ones. Using methods from statistical mechanics, we study the phase transition between these two qualitatively different scenarios. In the mean-field rendition of this model, we identify parameter regimes where the transition is first or second order. In all cases, we have found that the transitions are a consequence solely of the gang to graffiti couplings, implying that direct gang to gang interactions are not strictly necessary for gang territory formation; in particular, graffiti may be the sole driving force behind gang clustering. We further discuss possible sociological -- as well as ecological -- ramifications of our results.
Additional file 1 of A case series on recurrent and persisting IgA vasculitis (Henoch Schonlein purpura) in children
Creators: name: Marro, Julien
name: Williams, Chloe
name: Pain, Clare E.
name: Oni, Louise
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences

description: Supplementary Material 1
A protected spin-orbit induced absorption divergence in distorted Landau levels
Creators: name: Sidler, Dominik
name: Ruggenthaler, Michael
name: Rubio, Angel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The effect of spin-orbit (and Darwin) interaction on a 2D electron gas subject to a radial symmetric, inhomogeneous $1/r$-magnetic field is discussed analytically in a perturbative and non-perturbative manner. For this purpose, we investigate the radial Hall conductivity that emerges from an additional homogeneous electric field perturbation perpendicular to the 2D electron gas, which solely interacts via spin-orbit coupling. Numerical calculations of the absorptive spin-orbit spectra show for an ideal InSb electron gas a behaviour that is dominated by the localized (atomic) part of the distorted Landau levels. In contrast, however, we also find analytically that a (non-local) divergent static response emerges for Fermi energies close to the ionization energy in the thermodynamic limit. The divergent linear response implies that the external electric field is entirely absorbed outside the 2D electron gas by induced radial spin-orbit currents, as it would be the case inside a perfect conductor. This spin-orbit induced polarization mechanism depends on the effective $g^*$-factor of the material for which it shows a critical behaviour at $g^*_c=2$, where it abruptly switches direction. The diverging absorption relies on the presence of degenerate energies with allowed selection rules that are imposed by the radial symmetry of our inhomogeneous setup. We show analytically the presence of a discrete Rydberg-like band structure that obeys these symmetry properties. In a last step, we investigate the robustness of the spectra by solving analytically the Dirac equation expanded up to order $1/(mc)^2$. We find that the distorted Landau-levels, and thus the divergent spin-orbit polarization, remain protected with respect to slow changes of the applied $1/r$-magnetic field.
Ultrafast dynamics of charge density waves in 4Hb-TaSe2 probed by femtosecond electron diffraction
Creators: name: Erasmus, N.
name: Eichberger, M.
name: Haupt, K.
name: Boshoff, I.
name: Kassier, G.
name: Birmurske, R.
name: Berger, H.
name: Demsar, J.
name: Schwoerer, H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The dynamics of the photoinduced commensurate to incommensurate charge density wave (CDW) phase transition in 4Hb-TaSe2 are investigated by femtosecond electron diffraction. In the perturbative regime the CDW reforms on a 150 ps timescale, which is two orders of magnitude slower than in other transition-metal dichalcogenides. We attribute this to a weak coupling between the CDW carrying T-layers and thus demonstrate the importance of three-dimensionality for the existence of CDWs. With increasing optical excitation the phase transition is achieved showing a second order character in contrast to the first order behavior in thermal equilibrium.
description: 5 pages, 3 figures, accepted for publication in Phys. Rev. Lett
Four Images: Franz Müller, Possibly Alfred William Parsons, Sir Charles Gavan Duffy, Major Venturi
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Murderers
Painters

description: four images: "Germn Tailor" Franz Müller [umlaut added by Thomas Carlyle] "1864" "(murderer!)" "in a railway"; "Parsons, Painter, Photogr &c"; "C.G. Duffy"; "Major Venturi"
Four images: Drawing of a Large Rock Formation, Miss Constance E. Kent, Exeter Cathedral, and Dr. E.W. Pritchard
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Cathedrals
Murderers

description: Four images: a pen & ink drawing of a large rock formation, perhaps on a beach, with two figures in the foreground, possibly drawn by Ruskin; Miss Constance E. Kent [murderer, by axe, of her young step-brother]; west front of the cathedral in Exeter; and Dr. E.W. Pritchard "wife-poisoner" [Edward William Pritchard (1825-65; ODNB)]
Two-dimensional SCFTs from wrapped branes and c-extremization
Creators: name: Benini, Francesco
name: Bobev, Nikolay
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We apply c-extremization, whose proof we review in full detail, to study two-dimensional N=(0,2) superconformal field theories arising from the low-energy dynamics of D3-branes wrapped on Riemann surfaces and M5-branes wrapped on four-manifolds. We compute the exact central charges of these theories using anomalies and c-extremization. In all cases we also construct AdS_3 supergravity solutions of type IIB and eleven-dimensional supergravity, which are holographic duals to the field theories at large N, and exactly reproduce the central charges computed via c-extremization.
description: 72 pages, 5 figures. This paper is a sequel to arXiv:1211.4030. v2: minor modifications and updated references
Weltkunstgeschichte und Universalismusbegriffe: 1900/2010
Creators: name: Leeb, Susanne
Publisher: name: kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften
Year: 2017

description: -
description: kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften, Bd. 40, Nr. 2 (2012): kritische berichte
Bounds on Dark Matter Interactions with Electroweak Gauge Bosons
Creators: name: Cotta, R. C.
name: Hewett, J. L.
name: Le, M. P.
name: Rizzo, T. G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate scenarios in which dark matter interacts with the Standard Model primarily through electroweak gauge bosons. We employ an effective field theory framework wherein the Standard Model and the dark matter particle are the only light states in order to derive model-independent bounds. Bounds on such interactions are derived from dark matter production by weak boson fusion at the LHC, indirect detection searches for the products of dark matter annihilation and from the measured invisible width of the $Z^0$. We find that limits on the UV scale, $Λ$, reach weak scale values for most operators and values of the dark matter mass, thus probing the most natural scenarios in the WIMP dark matter paradigm. Our bounds suggest that light dark matter ($m_χ\lsim m_Z/2$ or $m_χ\lsim 100-200\gev$, depending on the operator) cannot interact only with the electroweak gauge bosons of the Standard Model, but rather requires additional operator contributions or dark sector structure to avoid overclosing the universe.
description: 45 pages, 26 figures
title: Συγκριτική αξιολόγηση αλγορίθμων μηχανικής εκμάθησης για την ανάπτυξη μοντέλων πρόβλεψης αποχώρησης πελατών
title: Comparative evaluation of machine learning algorithms for the development of churn prediction models
Creators: name: Λεμοντζογλου Ξανθιππη
Publisher: name: Technical University of Crete
Year: 2015

description: Με τη χρήση πραγματικών δεδομένων από εταιρεία τηλεπικοινωνιών και αλγορίθμων μηχανικής εκμάθησης αναπτύσσονται μοντέλα πρόβλεψης αποχώρησης πελατών. Οι αλγόριθμοι που επιλέγονται χρησιμοποιούν μάθηση υπό επίβλεψη (supervised learning) ώστε να  έχουν τη δυνατότητα πρόβλεψης (prediction) μέσω ταξινόμησης (classification) των πελατών σε δύο κλάσεις, εν δυνάμει αποχωρησάντων ή μη. Ονομαστικά χρησιμοποιούνται λογιστική παλινδρόμηση, Bayes Νetwork (Bayesian αλγόριθμοι), Proximal SVM (αλγόριθμος μηχανών διανυσμάτων υποστήριξης), SimpleCART ( δέντρα απόφασης), Multilayer perceptron (τεχνητά νευρωνικά δίκτυα) , Διαφορικός εξελιγκτικός αλγόριθμος και 3 αλγόριθμοι που χρησιμοποιούν τα μεταθησιακά μοντέλα, Bagging , Random Forest (Bagging με randomization) και AdaBoostM1 (Boosting). Επιπρόσθετα, για την αξιολόγηση του ρόλου των μεταβλητών γίνονται τα παραπάνω πειράματα με σύνολα δεδομένων που προκύπτουν από τις μεθοδολογίες διαλογής μεταβλητών Chisquared, Infogain και Gainratio. Τα περιβάλλοντα υλοποίησης είναι Weka και Matlab. Η συγκριτική αξιολόγηση γίνεται από τη σκοπιά του customer analytics, κλάδο του business analytics. Στόχος να αξιολογηθούν τα μοντέλα ως προς την προβλεπτική τους ικανότητα ως προς τη χρήση τους στην ανάπτυξη στρατηγικών  διαχείρισης απώλειας πελατών, ώστε να διαφυλάττεται η βιωσιμότητα και κερδοφορία της εκάστοτε επιχείρησης.
An Implementation of a Channelizer based on a Goertzel Filter Bank for the Read-Out of Cryogenic Sensors
Creators: name: Ferreyro, L. P.
name: Redondo, M. García
name: Hampel, M. R.
name: Almela, A.
name: Fuster, A.
name: Salum, J.
name: Geria, J. M.
name: Bonaparte, J.
name: Bonilla-Neira, J.
name: Müller, N.
name: Karcher, N.
name: Sander, O.
name: Platino, M.
name: Etchegoyen, A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Signal Processing (eess.SP)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this work we present an application of the Goertzel Filter for the channelization of multi-tonal signals, typically used for the read-out of cryogenic sensors which are multiplexed in the frequency domain (FDM), by means of Microwave Superconducting Quantum Interference Device (SQUID) Multiplexer ($μ$MUX). We demonstrate how implementing a bank of many of these filters, can be used to perform a channelization of the multi-tonal input signal to retrieve the data added by the sensors. We show how this approach can be implemented in a resource-efficient manner in a Field Programmable Gate Array (FPGA) within the state-of-the-art, which allows great scalability for reading thousands of sensors; as is required by Radio Telescopes in Cosmic Microwave Background Radiation (CMB) surveys using cryogenic bolometers, particles detection like Neutrino mass estimation using cryogenic calorimeters or Quantum Computing.
description: 17 pages, 18 figures, paper submitted for review for the Journal of Instrumentation (JINST)
title: Μέτρηση και ανάλυση καταναλωτικών προτιμήσεων με χρήση διαδικτυακής Choice Based Conjoint Analysis: η περίπτωση των Smartphone

Creators: name: Βαλαβανης Νικολαος
Publisher: name: Technical University of Crete
Year: 2015

description:      Η παρούσα διπλωματική εργασία αφορά τη μέτρηση και ανάλυση των καταναλωτικών  προτιμήσεων για κινητά τηλέφωνα τύπου Smartphone . Στα πλαίσια της εργασίας  πραγματοποιήθηκε  διαδικτυακή έρευνα με χρήση ερωτηματολογίων και έγινε εφαρμογή της μεθόδου Choice Based Conjoint Analysis (CBC) με χρήση του λογισμικού της Sawtooth Software. Το Smartphone ως καταναλωτικό προϊόν  αναλύθηκε  σε χαρακτηριστικά και επίπεδα και ο συμμετέχων στην έρευνα  επέλεξε το περισσότερο προτιμητέο από μια σειρά διαδοχικών ομάδων υποθετικών προφίλ προϊόντων. Στην συνέχεια  πραγματοποιήθηκαν προσομοιώσεις  αγοράς που μας επιτρέπουν να γνωρίζουμε  πόσα χρήματα είναι διατεθειμένοι να πληρώσουν οι καταναλωτές για ένα επιπλέον επίπεδο κάποιου χαρακτηριστικού. Τέλος έγινε τμηματοποίηση της αγοράς με την χρήση του αλγόριθμου K-means στην Matlab . Οι καταναλωτές  χωρίστηκαν σε ομάδες με κοινά χαρακτηριστικά  και κοινές προτιμήσεις με σκοπό την επιλογή από πλευράς εταιρίας της αγοράς στόχου και την τοποθέτηση του κατάλληλου προϊόντος που καλύπτει τις ανάγκες τους.
Titel
Creators: name: Redaktion, Die
Publisher: name: KulturGut : aus der Forschung des Germanischen Nationalmuseums
Year: 2017

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 54 (2017): KulturGut: aus der Forschung des Germanischen Nationalmuseums
Single-pixel digital "ghost" holography
Creators: name: Clemente, Pere
name: Duran, Vicente
name: Tajahuerce, Enrique
name: Torres-Company, Victor
name: Lancis, Jesus
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Since its discovery, the "ghost" diffraction phenomenon has emerged as a non-conventional technique for optical imaging with very promising advantages. However, extracting intensity and phase information of a structured and realistic object remains a challenge. Here, we show that a "ghost" hologram can be recorded with a single-pixel configuration by adapting concepts from standard digital holography. The presented homodyne scheme enables phase imaging with nanometric depth resolution, three-dimensional focusing ability, and shows high signal-to-noise ratio.
Brackets
Creators: name: Grabowski, Janusz
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We review origins and main properties of the most important bracket operations appearing canonically in differential geometry and mathematical physics in the classical, as well as the supergeometric setting. The review is supplemented by a few new concepts and examples.
description: 40 pages, minor corrections, to appear in IJGMMP
title: Μοντελοποίηση της διαδικασίας αναγνώρισης των επαγγελματικών κινδύνων και εκτίμησης της επικινδυνότητας σε θέσεις εργασίας που χαρακτηρίζονται από βλαπτικούς παράγοντες σε ένα ευρύ πεδίο τυπικών κινδύνων διαφορετικού τύπου
Creators: name: Κουρπα Ιωαννα
Publisher: name: Technical University of Crete
Year: 2015

description: Αντικείμενο της παρούσας μεταπτυχιακής διατριβής είναι η πλήρης μοντελοποίηση της διαδικασίας αναγνώρισης των επαγγελματικών κινδύνων και εκτίμησης της επικινδυνότητας σε θέσεις εργασίας που χαρακτηρίζονται από βλαπτικούς παράγοντες σε ένα ευρύ πεδίο τυπικών κινδύνων διαφορετικού τύπου. Τη βάση της μοντελοποίησης αποτελεί η Ανάλυση Δένδρων Αστοχιών όπως εφαρμόζεται στη ανάλυση βιομηχανικής επικινδυνότητας.