cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Instabilities of the Small Black Hole: a view from N=4 SYM
Creators: name: Hollowood, Timothy
name: Kumar, S. Prem
name: Naqvi, Asad
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute a one-loop effective action for the constant modes of the scalars and the Polyakov loop matrix of N=4 SYM on S^3 at finite temperature and weak 't Hooft coupling. Above a critical temperature, the effective potential develops new unstable directions accompanied by new saddle points which only preserve an SO(5) subgroup of the SO(6) global R-symmetry. We identify this phenomenon as the weak coupling version of the well known Gregory-Laflamme localization instability in the gravity dual of the strongly coupled field theory: The small AdS_5 black hole when viewed as a ten dimensional, asymptotically AdS_5 X S^5 solution smeared on the S^5 is unstable to localization on S^5. Our effective potential, in a specific Lorentzian continuation, can provide a qualitative holographic description of the decay of the "topological black hole'' into the AdS bubble of nothing.
description: 39 pages, 6 figures, uses JHEP3.cls, references added
Few strongly interacting fermions of different mass driven in the vicinity of a critical point
Creators: name: Włodzyński, Damian
name: Sowiński, Tomasz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It was recently argued that one-dimensional systems of several strongly interacting fermions of different mass undergo critical transitions between different spatial orderings when the external confinement adiabatically changes its shape. In this work, we explore their dynamical properties when finite-time drivings are considered. By detailed analysis of many-body spectra, we show that the dynamics is typically guided only by the lowest eigenstates and may be well-understood in the language of the generalized Landau-Zener mechanism. In this way, we can capture precisely the dynamical response of the system to the external driving. As consequence, we show that by appropriate tailoring parameters of the driving one can target desired many-body state in a non-infinite time. Our theoretical predictions can be straightforwardly utilized in upcoming state-of-the-art experiments with ultracold atoms.
description: Authors' version accepted for publication
Homogenization of linear transport equations in a stationary ergodic setting
Creators: name: Dalibard, Anne-Laure
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 37J35, 35B27, 35F10

description: We study the homogenization of a linear kinetic equation which models the evolution of the density of charged particles submitted to a highly oscillating electric field. The electric field and the initial density are assumed to be random and stationary. We identify the asymptotic microscopic and macroscopic profiles of the density, and we derive formulas for these profiles when the space dimension is equal to one.
description: 24 pages
Elicitation of vocabulary for new items
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio files VP-290513-02 through VP-290513-06: Elicitation of vocabulary for items introduced to Hupa culture after contact with Euro-Americans in the mid-19th century. VP-290513-02, VP-290513-03, and VP-290513-04 are based on "Schedule 24: New Words," pp. 192-195 of a Bureau of American Ethnography vocabulary schedule collected by Jeremiah Curtin in 1888-1889 (National Anthropological Archives MS 1442 and MS 2063), starting with 'horse' (VP-290513-02), 'clock' (VP-290513-03), and 'coat' (VP-290513-04). VP-290513-05 covers foods, and VP-290513-06 covers containers along with associated partitive expressions.
A function on the homology of 3-manifolds
Creators: name: Turaev, Vladimir
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M99

description: In analogy with the Thurston norm, we define for an orientable 3-manifold $M$ a numerical function on $H_2(M;Q/Z)$. This function measures the minimal complexity of folded surfaces representing a given homology class. A similar function is defined on the torsion subgroup of $H_1(M)$. These functions are estimated from below in terms of abelian torsions of $M$.
description: 16 pages, no figures. The second version incorporates several minor corrections
Error analysis of forced discrete mechanical systems
Creators: name: Fernández, Javier
name: Zurita, Sebastián Elías Graiff
name: Grillo, Sergio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37J99, 37M15, 70G45 (Primary) 70G75, 70K35 (Secondary)

description: The purpose of this paper is to perform an error analysis of the variational integrators of mechanical systems subject to external forcing. Essentially, we prove that when a discretization of contact order $r$ of the Lagrangian and force are used, the integrator has the same contact order. Our analysis is performed first for discrete forced mechanical systems defined over $TQ$, where we study the existence of flows, the construction and properties of discrete exact systems and the contact order of the flows (variational integrators) in terms of the contact order of the original systems. Then we use those results to derive the corresponding analysis for the analogous forced systems defined over $Q\times Q$.
description: Minor revision: slight modification of Definition 3.1 to accept more general examples. All results remain unchanged
Μετάφραση και σχόλια στο έργο του Ιωάννη Φιλόπονου «Των εις την Μυωσέως κοσμογονίαν εξηγητικών, λόγος πρώτος» (“De opificio mundi”)
Creators: name: Βαρδαλά, Μαρία Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: εξηγητικός λόγος
κοσμογονία
Ιωάννης Φιλόπονος
exegetical work
cosmogony
John Philoponus

description: Αντικείμενο της παρούσας εργασίας είναι η μετάφραση και ο σχολιασμός του πρώτου μέρους του εξηγητικού λόγου του Ιωάννη Φιλόπονου, εκκλησιαστικού συγγραφέα του 6ου αιώνα, με τίτλο Εις την Μωυσέως κοσμογονίαν εξηγητικά. Η εργασία αποτελείται αρχικά από μια εισαγωγή, η οποία μεταξύ άλλων αναφέρεται τόσο στη συγγραφική πορεία του Φιλόπονου όσο και τη θεολογική και φιλοσοφική του σκέψη, στοιχεία που καθορίζουν τον τρόπο γραφής και μέθοδο εξήγησης των κειμένων της Παλαιάς και Καινής Διαθήκης. Στη συνέχεια, παρατίθεται η μετάφραση και ο σχολιασμός του πρώτου μέρους του έργου, όπου ερμηνεύονται από τον συγγραφέα τα τρία πρώτα εδάφια της Γένεσης. Μέσω του σχολιασμού, δίνεται η δυνατότητα να παρακολουθήσουμε την απόρριψη της επιχειρηματολογίας του Θεοδώρου Μοψουεστίας και των υποστηρικτών του, αλλά και του Κοσμά Ινδικοπλεύστη, τις θέσεις των οποίων θεωρεί αντίθετες με το χριστιανικό δόγμα και τη μωσαϊκή διδασκαλία, απόρριψη που εκτείνεται σχεδόν σε όλο το εύρος του πρώτου μέρους
description: This dissertation examines the exegetical work of Joannes Philoponus, a sixth century Christian author, entitled “De Opificio mundi”, by providing a translation and a commentary of the work’s first part. The dissertation consists of an introduction, which, among other relevant topics, refers both to Philoponus’ career as an author and to his theological and philosophical thought, elements which have profoundly defined his way of writing as well his way of exegesis of the Old and New Testament. The dissertation’s second part concerns the translation and commentary of the work’s first book, where the first three verses of Genesis are examined. Through the commentary one can track the rejection of Theodorus’ of Mopsuestia argumentation and his supporters’ as well the one of Cosmas Indicopleustes, the content of which Philoponus considers to be opposed to the Christian creed as well Moses’ teaching, a rejection which extends to the first part of the work
Atomic-scale Visualization of Electronic Fluid Flow
Creators: name: Liu, Xiaolong
name: Chong, Yi Xue
name: Sharma, Rahul
name: Davis, J. C. Séamus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The most essential characteristic of any fluid is the velocity field v(r) and this is particularly true for macroscopic quantum fluids. Although rapid advances have occurred in quantum fluid v(r) imaging, the velocity field of a charged superfluid - a superconductor - has never been visualized. Here we use superconductive-tip scanning tunneling microscopy to image the electron-pair density \r{ho}_S(r) and velocity v_S(r) fields of the flowing electron-pair fluid in superconducting NbSe2. Imaging v_S(r) surrounding a quantized vortex finds speeds reaching 10,000 km/hr. Together with independent imaging of \r{ho}_S(r) via Josephson tunneling, we visualize the supercurrent density j_S(r)=\r{ho}_S(r)v_S(r), which peaks above 3 x 10^7 A/cm^2. The spatial patterns in electronic fluid flow and magneto-hydrodynamics reveal hexagonal structures co-aligned to the crystal lattice and quasiparticle bound states, as long anticipated. These novel techniques pave the way for electronic fluid flow visualization in many other quantum fluids.
Additional file 2 of Twenty-four-week oral dosing toxicities of Herba Siegesbeckiae in rats
Creators: name: Wu, Jia-Ying
name: Chan, Yuen-Cheung
name: Guo, Hui
name: Chen, Ying-Jie
name: Liu, Yu-Xi
name: Yi, Hua
name: Yu, Zhi-Ling
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Virology
subject: Computational Biology

description: Additional file 2: Figure S3. Original blot images of Western blot. Protein levels of p38, phospho-p38 (Thr180/Tyr182), JNK, phospho-JNK (Thr183/Tyr185), ERK and phospho-ERK (Thr202/Tyr204) and α-Actinin were shown. The bands were shown on different films because of different exposure time.
Nucleon isovector scalar charge from overlap fermions
Creators: name: Liu, Liuming
name: Chen, Ting
name: Draper, Terrence
name: Liang, Jian
name: Liu, Keh-Fei
name: Wang, Gen
name: Yang, Yi-Bo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the nucleon isovector scalar charge in lattice QCD using overlap fermions on five ensembles of gauge configurations generated by the RBC/UKQCD collaboration using the domain-wall quark action with $2+1$ dynamical flavors. The five ensembles cover five pion masses, $m_π\approx$ 139, 171, 302, 337 and 371 MeV, and four lattice spacings, $a \approx $ 0.06, 0.08, 0.11 and 0.14 fm. Three to six valence quark masses are computed on each ensemble to investigate the pion mass dependence. The extrapolation to the physical pion mass, continuum and infinite volume limits is obtained by a global fit of all data to a formula originated from partially quenched chiral perturbation theory. The excited-states contamination is carefully analyzed with 3--5 sink-source separations and multi-state fits. Our final result, in the $\overline{\text{MS}}$ scheme at 2 GeV, is $g_{S}^{u-d}= 0.94 (10)_{stat}(8)_{sys}$, where the first error is the statistical error and the second is the systematic error.
description: 18 pages, 7 figures, 4 tables
Alpha-T-T and T-T-alpha-T diagrams in intelligent processing of thermosetting composites
Creators: name: Osinski, Barbara
Publisher: name: University of British Columbia
Year: 2008

description: The majority of existing models for processing in thermoset matrix composites concentrate nearly exclusively on heat and mass transfer problems and account for material-related aspects in a very simplified manner The objective of this work is to provide that missing element by proposing a clearly defined system which yields all the information of Gillham' s T-T-T diagram but can beused for non-isothermal curing cycles. To build the system, three elements are needed: the gelation and vitrification curves, expressed as functions of degree of conversion; the kinetic model of conversion; and a diagram combining all complex information provided by the system. The proposed system for the Narmco 5208 resin incorporates a recently developed mechanistic model for the kinetics of conversion. The algorithm calculates and graphically presents the progress of thermoset processing using the developed diagrams which re-introduce time as an independent variable. Themost important part of the system is its graphical output: a-T-T diagrams, originally developed in this work. Their role is to enhance the understanding of the process by providing the rheological information. Practical applications of the system, with an increasing degree of its sophistication, are presented using four examples. The first case demonstrates the basic value offered by the diagrams - prediction of the moment of gelation and vitrification in advance; the second application shows the advantage of the system in thick composite processing; the third is the generation of the T-T-T diagram for the Narmco resin based on the kinetic model of conversion; the fourth application, where the systemis used in the reverse mode, in a new capability - the search for an optimum curing cycle in the RTP method. In experimental part of the work, the kinetic model of conversion incorporated into the system was verified using the Differential Scanning Calorimetry (DSC) technique, and the rheology of the resin was investigated using the Rheometric Dynamic Analyser (RDA) and DSC apparatus.
A model for fermion masses and lepton mixing in SO(10) x A4
Creators: name: Morisi, Stefano
name: Picariello, Marco
name: Torrente-Lujan, Emilio
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The discrete flavor symmetry A4 explains very well neutrino data at low energy, but it seems difficult to extend it to grand unified models since in general left-handed and right-handed fields belong to different A4 representations. Recently it has been proposed a model where all the fermions equally transform under A4. We study here a concrete SO(10) realization of such a model providing small neutrino masses through the seesaw mechanism. We fit at tree level the charged fermion masses run up to the unification scale. Some fermion masses properties come from the SO(10) symmetry while lepton mixing angles are consequence of the A4 properties. Moreover, our model predicts the absolute value of the neutrino masses, these ones are in the range $m_ν\simeq 0.005-0.052 eV$.
description: 15 pages. V2: Final version to appear in the journal
Automated extraction of research questions and answers from medical publications
Creators: name: Καράτζια, Αναστασία Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ιατρική βασισμένη στην τεκμηρίωση
Ακολουθία ετικετών
Βαθιά μάθηση
Evidence Based Medicine
Sequence tagging
Deep learning

description: Evidence based medicine is a systematic approach to clinical problem solving which allows the integration of the best available research evidence with clinical expertise and patient values. Physicians are required to follow a basic model, named the PICO model in order to practice evidence based medicine. In the context of this thesis, a variety of Bidirectional Long Short – Term Memory based models is proposed for named entity recognition of the basic PICO entities. These models include Bidirectional Long Short – Term Memory networks with a Conditional Random Field layer or Bidirectional Long Short – Term Memory networks with a Conditional Random Field layer and an Attention layer. These models were trained on a corpus of 5000 richly annotated abstracts of medical articles describing clinical randomized control trials. Different word vector representations were tested in the models, including word level, character level and part – of – speech tag level. Preliminary results revealed that the neural networks model performs well but further investigations are necessary in order to achieve state-of – the – art results.
description: Η ιατρική βασισμένη σε τεκμηρίωση είναι μια συστηματική προσέγγιση της επίλυσης ιατρικών προβλημάτων, η οποία επιτρέπει την ενσωμάτωση των βέλτιστων διαθέσιμων στοιχείων έρευνας με την κλινική εμπειρογνωμοσύνη. Οι γιατροί καλούνται να ακολουθήσουν ένα βασικό μοντέλο, το οποίο ονομάζεται PICO μοντέλο, προκειμένου να ασκήσουν ιατρική που βασίζεται στην τεκμηρίωση. Στο πλαίσιο της παρούσας διπλωματικής εργασίας, προτείνεται μια ποικιλία νευρωνικών μοντέλων που βασίζονται σε Διπλής Κατεύθυνσης Μακράς Διάρκειας μοντέλα μνήμης, για την αναγνώριση των βασικών PICO οντοτήτων. Αυτά τα μοντέλα περιλαμβάνουν Διπλής Κατεύθυνσης Μακράς Διάρκειας δίκτυα μνήμης με επίπεδα Υποθετικών Τυχαίων Πεδίων ή Διπλής Κατεύθυνσης Μακράς Διάρκειας μοντέλα μνήμης σε συνδυασμό με επίπεδα Υποθετικών Τυχαίων Πεδίων και επίπεδα Προσοχής. Τα εν λόγω μοντέλα εκπαιδεύτηκαν σε ένα σύνολο από 5000 περιλήψεις ιατρικών κειμένων που περιγράφουν κλινικές μελέτες. Διαφορετικές αναπαραστάσεις λέξεων δοκιμάστηκαν στα μοντέλα, σε επίπεδο λέξεων, επίπεδο χαρακτήρων και επίπεδο ετικέτας τμήματος ομιλίας. Τα προκαταρκτικά αποτελέσματα αποκάλυψαν ότι το μοντέλο των νευρωνικών δικτύων λειτουργεί καλά, αλλά περαιτέρω έρευνες είναι απαραίτητες για την επίτευξη αποτελεσμάτων τελευταίας τεχνολογίας.
Spatial enantioseparation of gaseous chiral molecules
Creators: name: Liu, Bo
name: Ye, Chong
name: Sun, C. P.
name: Li, Yong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We explore the spatial enantioseparation of gaseous chiral molecules for the cyclic three-level systems coupled with three electromagnetic fields. Due to molecular rotations, the specific requirements of the polarization directions of the three electromagnetic fields lead to the space-dependent part of the overall phase of the coupling strengths. Thus, the overall phase of the coupling strengths, which differs with $π$ for the enantiomers in the cyclic three-level model of chiral molecules, varies intensely in the length scale of the typical wavelength of the applied electromagnetic fields. Under the induced gauge potentials resulting from the space-dependent part of the overall phase and the space-dependent intensities of coupling strengths, we further show spatial enantioseparation for typical parameters of gaseous chiral molecules.
description: 8 pages, 4 figures
Resolving the formation of cold HI filaments in the high velocity cloud complex C
Creators: name: Marchal, Antoine
name: Martin, Peter G.
name: Gong, Munan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The physical properties of galactic halo gas have a profound impact on the life cycle of galaxies. As gas travels through a galactic halo, it undergoes dynamical interactions, influencing its impact on star formation and the chemical evolution of the galactic disk. In the Milky-Way halo, considerable effort has been made to understand the spatial distribution of neutral gas, which are mostly in the form of large complexes. However, the internal variations of their physical properties remains unclear. In this study, we investigate the thermal and dynamical state of the neutral gas in HVCs. High-resolution observations (1.'1) of the 21 cm line emission in the EN field of the DHIGLS HI survey are used to analyze the physical properties of the bright concentration C I B located at an edge of complex C. We use the Gaussian decomposition code ROHSA to model its multiphase content, and perform a power spectrum analysis to analyze its multi-scale structure. Physical properties of some 200 structures extracted using dendrograms are examined. We identify two distinct regions, one of which has a prominent protrusion extending from the edge of complex C that exhibits an ongoing phase transition from warm diffuse gas to cold dense gas and filaments. The scale at which the warm gas becomes unstable and undergoes a thermal condensation is about 15 pc, corresponding to a cooling time about 1.5 Myr. We find that a transition from subsonic to trans-sonic turbulence is associated with the thermal condensation. A large scale perspective of complex C suggests that hydrodynamic instabilities are involved in creating the structured concentration C I B and the phase transition therein. However, the details of the dynamical and thermal processes remain unclear and will require further investigation, through both observations and numerical simulations. (Shortened for arxiv)
description: 32 pages, 31 figures, 7 tables. Accepted for publication in ApJ
Phase transitions in random mixtures of elementary cellular automata
Creators: name: Cirillo, Emilio N. M.
name: Nardi, Francesca R.
name: Spitoni, Cristian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate one-dimensional Probabilistic Cellular Automata, called Diploid Elementary Cellular Automata (DECA), obtained as random mixture of two different Elementary Cellular Automata rules. All the cells are updated synchronously and the probability for one cell to be $0$ or $1$ at time $t$ depends only on the value of the same cell and that of its neighbors at time $t-1$. These very simple models show a very rich behavior strongly depending on the choice of the two Elementary Cellular Automata that are randomly mixed together and on the parameter which governs probabilistically the mixture. In particular, we study the existence of phase transition for the whole set of possible DECA obtained by mixing the null rule which associates $0$ to any possible local configuration, with any of the other $255$ elementary rule. We approach the problem analytically via a Mean Field approximation and via the use of a rigorous approach based on the application of the Dobrushin Criterion. The distinguishing trait of our result is the possibility to describe the behavior of the whole set of considered DECA without exploiting the local properties of the individual models. The results that we find are coherent with numerical studies already published in the scientific literature and also with some rigorous results proven for some specific models.
description: 26 pages
Magnetoresistance and spin-transfer torque in magnetic tunnel junctions
Creators: name: Sun, J. Z.
name: Ralph, D. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We comment on both recent progress and lingering puzzles related to research on magnetic tunnel junctions (MTJs). MTJs are already being used in applications such as magnetic-field sensors in the read heads of disk drives, and they may also be the first device geometry in which spin-torque effects are applied to manipulate magnetic dynamics, in order to make nonvolatile magnetic random access memory. However, there remain many unanswered questions about such basic properties as the magnetoresistance of MTJs, how their properties change as a function of tunnel-barrier thickness and applied bias, and what are the magnitude and direction of the spin-transfer-torque vector induced by a tunnel current.
description: 37 pages, 2 figures. Contribution to a collection of "Current Perspectives" articles on spin transfer torque now available in the Journal of Magnetism and Magnetic Materials
"import_2005-14471.C" of "Measurement of Exclusive $\pi^{+}\pi^{-}$ and $\rho^0$ Meson Photoproduction at HERA"
Creators: name: H1 Collaboration
Publisher: name: HEPData
Year: 2021

description: conversion script
description: H1 collaboration, Eur.Phys.J.C80 (2020), 1189 [arxiv:2005.14471]. Diffractive photoproduction of two oppositely charged pions off protons is measured in the photon-proton energy range $20
Controlling anisotropy in 2D microscopic models of growth
Creators: name: Gagliardi, Luca
name: Pierre-Louis, Olivier
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The quantitative knowledge of interface anisotropy in lattice models is a major issue, both for the parametrization of continuum interface models, and for the analysis of experimental observations. In this paper, we focus on the anisotropy of line tension and stiffness, which plays a major role both in equilibrium shapes and fluctuations, and in the selection of nonequilibrium growth patterns. We consider a 2D Ising Hamiltonian on a square lattice with first and second-nearest-neighbor interactions. The surface stiffness and line tension are calculated by means of a broken-bond model for arbitrary orientations. The analysis of the interface energy allows us to determine the conditions under which stiffness anisotropy is minimal. These results are supported by a quantitative comparison with kinetic Monte Carlo simulations, based on the coupling of a field of mobile atoms to a condensed phase. Furthermore, we introduce a generic smoothing parameter which allows one to mimic the finite resolution of experimental microscopy techniques. Our results provide a method to fine-tune the interface energy in models of nanoscale non-equilibrium processes, where anisotropy and fluctuations combine and give rise to non-trivial morphologies.
Η Αισθητική στην Αρχαία Ελληνική Τέχνη. Πρόταση έκθεσης για το Εθνικό Αρχαιολογικό Μουσείο
Creators: name: Αργυρόπουλος, Βασίλειος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αισθητική
Μουσειολογία
Νοηματικός Σχεδιασμός
Aesthetics
Museology
Conceptual Design

description: Σκοπός της μεταπτυχιακής εργασίας ήταν να μελετηθεί ο τρόπος της αισθητικής θεώρησης του υλικού πολιτισμού στην αρχαία Ελλάδα και στην συνέχεια να πραγματοποιηθεί μία Μουσειολογική πρόταση για έκθεση στο Εθνικό Αρχαιολογικό Μουσείο στην Αθήνα. Ειδικότερα, μελετήθηκε η έννοια της Αισθητικής έτσι όπως την αντιλήφθηκαν οι σπουδαίοι αρχαίοι Έλληνες φιλόσοφοι, κυρίως ο Πλάτων και ο Αριστοτέλης, ενώ στην συνέχεια παρουσιάσθηκαν και ορισμένες νέες θεωρίες αντιμετώπισης της Αισθητικής στην μεταγενέστερη και σύγχρονη εποχή. Κατόπιν, έγινε ανάλυση της συλλογής που επιλέξαμε για την έκθεσή μας στο Εθνικό Αρχαιολογικό Μουσείο και πραγματοποιήσαμε την Μουσειολογική μας πρόταση για μια νέα έκθεση με θέμα την Αισθητική, ως προς τον Νοηματικό Σχεδιασμό.
description: The aim of the present thesis was to identify the Aesthetical perspective of the material culture in Ancient Greece while also presenting a new Museological proposition for an exhibition in the National Archaeological Museum in Athens. Furthermore, ancient Greek Aesthetics was studied, especially through the works of Plato and Aristotle, while modern and contemporary theories about the same subject were also presented. Subsequently, we did an analysis and a selection of the collection of the National Archaeological Museum and we presented a new Museological conceptual proposition for an exhibition in the National Archaeological Museum with the Aesthetics of the ancient Greeks as our theme.
description: Σε συνεργασία με: Παιδαγωγικό Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
Prompto - The GAI Card Game Instructions
Creators: name: Westwood, Gemma
name: Liu, Luna
Publisher: name: National Teaching Repository
Year: 2024
Subjects: classificationCode: 390303
subject: Higher education
classificationCode: 390307
subject: Teacher education and professional development of educators

description: Prompto - The GAI Card Game
The Prompt Engineering Game or Prompto is a card game, the aim of which is to provide academics with the opportunity to hone their prompt engineering skills by supporting the experience of prompting a GAI tool (such as co-pilot or Chat-GPT) and allowing for the practice of critical thinking around GAI outputs in a group setting. The game was created with the facets of the gamification taxonomy (Toda, A.M. et al, 2019) in mind to ensure that not only was the game effective, but that it was pedagogically purposeful. Prompto allows for a practical way for academics to develop these skills, but also for them to consider how the game could be developed for use with students. This has led academics who have played the base game in this resource to create student facing adaptions to use with them. It is best used in a workshop setting to provide academics with the opportunity to not only play it, but to consider pedagogically innovative ways to develop digital skills, not just in the area of GAI, but in all digital skills areas for the benefit of both academics and students.
Bibliography
Toda, A.M. et al. (2019) ‘Analysing gamification elements in educational environments using an existing gamification taxonomy’, Smart Learning Environments, 6(1). doi:10.1186/s40561-019-0106-1. 
Acknowledgements
The game creators would like to acknowledge the contributions of the University of Birmingham Generative AI educator working group in supporting the testing and development of this resource, in particular: Helen Greetham – Digital Education Developer; Alexandra Davenport – Digital Education Developer; Thomas Penny - Digital Education Developer. They were instrumental in supporting the testing and development phase of the game. I should also like to acknowledge the support of the project lead Alison Gibson, Head of Digital education (Assessment and College of Social Sciences) for creating a space where we could experiment with a novel approach to GAI skill development and the education enhancement fund team at the University for providing the funding for the project.
Helical Magnetic Fields in Solar Active Regions: Theory vs. Observations
Creators: name: Petrovay, K.
name: Chaterjee, P.
name: Choudhuri, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The mean value of the normalized current helicity in solar active regions is on the order of 1e-8 1/m, negative in the northern hemisphere, positive in the southern hemisphere. Observations indicate that this helicity has a subsurface origin. Possible mechanisms leading to a twist of this amplitude in magnetic flux tubes include the solar dynamo, convective buffeting of rising flux tubes, and the accretion of weak external poloidal flux by a rising toroidal flux tube. After briefly reviewing the observational and theoretical constraints on the origin of helicity, we present a recently developed detailed model for poloidal flux accretion.
description: 10 pages, 5 figures
Transmission and Capacity Expansion Planning Against Rising Temperatures: A Case Study in Arizona
Creators: name: Skolfield, J. Kyle
name: Ramirez-Vergara, Jose
name: Escobedo, Adolfo R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: The stable and efficient operation of the transmission network is fundamental to the power system's ability to deliver electricity reliably and cheaply. As average temperatures continue to rise, the ability of the transmission network to meet demand is diminished. Higher temperatures lead to congestion by reducing thermal limits of lines while simultaneously reducing generation potential. Due to prohibitive costs and limited real estate for building new lines, it is necessary to consider capacity expansion as well to improve the functioning and efficiency of the grid. Optimal control, however, requires many discrete choices, rendering fully accurate models intractable. Furthermore, temperature changes will impact different regions and climate differently. As such, it is necessary to model both temperature changes and transmission flows with high spatial resolution. This work proposes a case study of the transmission grid centered in Arizona, using a DC optimal power flow mathematical formulation to plan for future transmission expansion and capacity expansion to efficiently meet demand. The effects of rising temperatures on transmission and generation are modeled at the regional level. Several classes of valid inequalities are employed to speed up the solution process. Multiple experiments considering different temperature and demand trends are considered which include each of the above technologies.
Συγκριτική μελέτη της αντοχής στην τάση εφελκυσμού αναστόμωσης της τραχείας 2 διαφορετικών ζωικών ειδών νεαρών και ενήλικων ατόμων
Creators: name: Μπρισίμη, Νικολέττα-Μαρία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αναστόμωση τραχείας
Τάση εφελκυσμού
Σκύλος
Tracheal anastomosis
Tensile strength
Dog

description: Στην παρούσα εργασία γίνεται σύγκριση της τάσης εφελκυσμού ύστερα από αναστόμωση της τραχείας σε 4 διαφορετικές ομάδες ζώων με σκοπό την εξαγωγή συμπερασμάτων σχετικά με την αντοχή της τραχείας , την ελαστικότητά της και την διαφορά αυτών σε νεαρά και ενήλικα ζώα. Πιο συγκεκριμένα εξετάστηκαν 4 διαφορετικές ομάδες ζώων, διαφορετικών ηλικιών δύο διαφορετικών ζωικών ειδών, σκύλων και προβάτων. Οι ομάδες που συμμετείχαν ήταν : 1) νεαρά σκυλιά <8 μηνών (PT) 2) ενήλικα σκυλιά 2-18 ετών (CT) 3) νεαροί αμνοί 3-4 μηνών (LT) 4) ενήλικα πρόβατα 6-8 ετών (ST). Οι ομάδες των σκύλων αποτελούνταν από 8 νεαρούς και 8 ενήλικες σκύλους ενώ των προβάτων από 5 τα νεαρά και 10 τα ενήλικα. Το πειραματικό σκέλος διενεργήθηκε in vitro και τα δείγματα ελέγχθηκαν στην τάση εφελκυσμού με ειδικό δυναμόμετρο Instron. Με βάση την στατιστική ανάλυση σημαντικές διαφορές βρέθηκαν στην αντοχή της τραχείας ύστερα από την άσκηση τάσης μεταξύ νεαρών και ενηλίκων ζώων και στα δύο είδη που εξετάστηκαν (P=0,007 για τους σκύλους και P=0,001 για τα πρόβατα). Σύμφωνα με τα παραπάνω αποτελέσματα οι τραχείες των ενηλίκων σκύλων και προβάτων έχουν μεγαλύτερη ανθεκτικότητα σε σχέση με τα νεαρά.
description: Tracheal resection and anastomosis is indicated for the removal of masses, reconstruction following trauma or transection and management of stenosis or avulsion. Tension in tracheal anastomosis may be more problematic in young dogs than in adults as it may result in dehiscence. The aim of the present experimental study was to compare maximum force to failure following tracheal anastomosis in young and adult dogs. Our hypothesis was that tracheal anastomosis in young dogs may require less force to create failure compared to adult dogs. Cadaveric tracheas that were obtained from 16 young dogs (n=8) aged less than 8 months and adults (n=8) aged 2-18 years and young sheep (n=5) aged 3-4 months old and adult sheep (n=10) aged 6-8 years old underwent end-to-end anastomosis in a continuous suture pattern and were tested by maximum distraction to failure using a dynamometer. The maximum distraction force to failure was significantly less for young than adult dogs (P=0.007) and young and adult sheep (P= 0.001). Tracheal anastomosis in young dogs required less force to create failure suggesting that tension-relieving techniques may be necessary in tracheal anastomosis at the young age.
Finding Scientific Gems with Google
Creators: name: Chen, P.
name: Xie, H.
name: Maslov, S.
name: Redner, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We apply the Google PageRank algorithm to assess the relative importance of all publications in the Physical Review family of journals from 1893--2003. While the Google number and the number of citations for each publication are positively correlated, outliers from this linear relation identify some exceptional papers or "gems" that are universally familiar to physicists.
description: 6 pages, 4 figures, 2 tables, 2-column revtex4 format
Nonlinear optical conductivity of a two-band crystal I
Creators: name: Passos, D. J.
name: Ventura, G. B.
name: Santos, J. M. B. Lopes dos
name: Lopes, J. M. Viana Parente
Publisher: name: arXiv
Year: 2021
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The structure of the electronic nonlinear optical conductivity is elucidated in a detailed study of the time-reversal symmetric two-band model. The nonlinear conductivity is decomposed as a sum of contributions related with different regions of the First Brillouin Zone, defined by single or multiphoton resonances. All contributions are written in terms of the same integrals, which contain all information specific to the particular model under study. In this way, ready-to-use formulas are provided that reduce the often tedious calculations of the second and third order optical conductivity to the evaluation of a small set of similar integrals. In the scenario where charge carriers are present prior to optical excitation, Fermi surface contributions must also be considered and are shown to have an universal frequency dependence, tunable by doping. General characteristics are made evident in this type of resonance-based analysis: the existence of step functions that determine the chemical potential dependence of electron-hole symmetric insulators; the determination of the imaginary part by Hilbert transforms, simpler than those of the nonlinear Kramers-Krönig relations; the absence of Drude peaks in the diagonal elements of the second order conductivity, among others. As examples, analytical expressions are derived for the nonlinear conductivities of some simple systems: a very basic model of direct gap semiconductors and the Dirac fermions of monolayer graphene.
title: Органикалық химиядан практикум
Creators: name: ELS IPR BOOKS
Publisher: name: EDP Hub (Идипи Хаб), Ай Пи Ар Медиа
Year: 2024

description: Органикалық химиядан практикум — оқу бағдарламасы негізінде негізгі органикалық тараулардан теориялық материал, зертханалық жұмыстар және зертханалық жұмыстардан кейін студенттердің өз білімдерін тексеру, бекіту мақсатында бақылау сұрақтары мен жаттығулар енгізілген оқулық. Қазақ тілінде оқулықтың болмауына байланысты «Органикалық химия» пәнін оқитын «Химия», «Химия-биология» және «Биология», «Химиялық криминалистикалық сараптама», «Химия» мамандықтарының студенттеріне арналған.
title: High-power infrared fiber lasers based on ytterbium doped tapered double clad fibers
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: ÐÐ¾ÑÐ½ÑÐµ Ð¸Ð½ÑÑÐ°ÐºÑÐ°ÑÐ½ÑÐµ Ð²Ð¾Ð»Ð¾ÐºÐ¾Ð½Ð½ÑÐµ Ð»Ð°Ð·ÐµÑÑ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ ÐºÐ¾Ð½Ð¸ÑÐµÑÐºÐ¸Ñ Ð²Ð¾Ð»Ð¾ÐºÐ¾Ð½ Ñ Ð´Ð²Ð¾Ð¹Ð½Ð¾Ð¹ Ð¾Ð±Ð¾Ð»Ð¾ÑÐºÐ¾Ð¹, Ð»ÐµÐ³Ð¸ÑÐ¾Ð²Ð°Ð½Ð½ÑÑ Ð¸ÑÑÐµÑÐ±Ð¸ÐµÐ¼
Creators: name: ÐÑ ÐÐ¾ÑÐ¸Ð½
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: ÐÐµÐ½ÐµÑÐ°ÑÐ¾ÑÑ ÐºÐ²Ð°Ð½ÑÐ¾Ð²ÑÐµ
Ð¼ÐµÑÐ¾Ð´ ÐÐ¶Ð¾Ð½ÑÐ°
Ð²Ð¾Ð»Ð¾ÐºÐ½Ð¾ Ð»ÐµÐ³Ð¸ÑÐ¾Ð²Ð°Ð½Ð½Ð¾Ðµ Ð¸ÑÑÐµÑÐ±Ð¸ÐµÐ¼
jones method
ytterbium-doped fiber

description: ÐÐ°Ð¼ Ð½ÐµÐ¾Ð±ÑÐ¾Ð´Ð¸Ð¼Ð¾ ÑÐ¾Ð·Ð´Ð°ÑÑ Ð¼Ð¾ÑÐ½ÑÐ¹ Ð¿Ð¸ÐºÐ¾ÑÐµÐºÑÐ½Ð´Ð½ÑÐ¹ Ð»Ð°Ð·ÐµÑ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ ÑÑÐµÐ¼Ñ Ð·Ð°Ð´Ð°ÑÑÐµÐ³Ð¾ Ð³ÐµÐ½ÐµÑÐ°ÑÐ¾ÑÐ° Ð¸ ÑÑÐ¸Ð»Ð¸ÑÐµÐ»Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸ (MOPA). Ð£ÑÐ¸Ð»ÐµÐ½Ð¸Ðµ Ð¾ÑÐ½Ð¾Ð²Ð½Ð¾Ð¹ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸ Ð´Ð¾ÑÑÐ¸Ð³Ð°ÐµÑÑÑ Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ Ð°ÐºÑÐ¸Ð²Ð½Ð¾Ð³Ð¾ Ð²Ð¾Ð»Ð¾ÐºÐ½Ð°, Ð»ÐµÐ³Ð¸ÑÐ¾Ð²Ð°Ð½Ð½Ð¾Ð³Ð¾ Ð¸ÑÑÐµÑÐ±Ð¸ÐµÐ¼. ÐÐ»ÑÑÐµÐ²ÑÐ¼Ð¸ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ð°Ð¼Ð¸, ÐºÐ¾ÑÐ¾ÑÑÐµ Ð½ÐµÐ¾Ð±ÑÐ¾Ð´Ð¸Ð¼Ð¾ ÑÐµÑÐ¸ÑÑ, ÑÐ²Ð»ÑÑÑÑÑ Ð¿Ð¾Ð´Ð´ÐµÑÐ¶Ð°Ð½Ð¸Ðµ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ñ Ð¿Ð¾Ð»ÑÑÐ¸Ð·Ð°ÑÐ¸Ð¸ Ð¸ Ð¼Ð°ÑÑÑÐ°Ð±Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸ Ð² Ð°ÐºÑÐ¸Ð²Ð½Ð¾Ð¼ Ð²Ð¾Ð»Ð¾ÐºÐ½Ðµ. Ð§ÑÐ¾ ÐºÐ°ÑÐ°ÐµÑÑÑ Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ñ Ð¿Ð¾Ð»ÑÑÐ¸Ð·Ð°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÐ²Ð¾Ð¹ÑÑÐ² Ð²Ð¾Ð»Ð¾ÐºÐ½Ð°, Ð¼Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð»Ð¸ Ð¼ÐµÑÐ¾Ð´ ÐÐ¶Ð¾Ð½ÑÐ° Ð´Ð»Ñ Ð¸Ð·ÑÑÐµÐ½Ð¸Ñ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ¾Ð² ÑÐ¾ ÑÐ²ÐµÑÑÐ½Ð¸Ð·ÐºÐ¸Ð¼Ð¸ Ð´Ð²ÑÐ»ÑÑÐµÐ¿ÑÐµÐ»Ð¾Ð¼Ð»ÑÑÑÐ¸Ð¼Ð¸ Ð²Ð¾Ð»Ð¾ÐºÐ½Ð°Ð¼Ð¸.
description: We need to create a high-power picosecond laser, based on master oscillator and power amplifier (MOPA) scheme. Main power amplification is achieved with the help of active fiber, doped with ytterbium. The key problems to be solved are polarization state maintenance and power scaling in an active fiber. Regarding the measurement of fiber polarization properties, we used the Jones method to study the experiments of ultra-low birefringent fibers.
title: CHRONOS 15 : 15th International Conference on Actionality, Tense, Aspect, Modality/Evidentiality
Publisher: name: Université Toulouse - Jean Jaurès
Year: 2024

description: CHRONOS is a series of international conferences dedicated to current research on the semantics and pragmatics of tense, aspect, actionality, and modality/evidentiality and also their morphology and syntax.
Might Carbon-Atmosphere White Dwarfs Harbour a New Type of Pulsating Star?
Creators: name: Fontaine, G.
name: Brassard, P.
name: Dufour, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the light of the recent and unexpected discovery of a brand new type of white dwarfs, those with carbon-dominated atmospheres, we examine the asteroseismological potential of such stars. The motivation behind this is based on the observation that past models of carbon-atmosphere white dwarfs have partially ionized outer layers that bear strong resemblance with those responsible for mode excitation in models of pulsating DB (helium-atmosphere) and pulsating DA (hydrogen-atmosphere) white dwarfs. Our exciting main result is that, given the right location in parameter space, some carbon-atmosphere white dwarfs are predicted to show pulsational instability against gravity modes. We are eagerly waiting the results of observational searches for luminosity variations in these stars.
description: 4-page letter + 4 figures
Newborn Magnetars as sources of Gravitational Radiation: constraints from High Energy observations of Magnetar Candidates
Creators: name: Dall'Osso, Simone
name: Stella, Luigi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Soft Gamma Repeaters and the Anomalous X-ray Pulsars are believed to contain slowly spinning "magnetars". The enormous energy liberated in the 2004 Dece 27 giant flare from SGR 1806-20, together with the likely recurrence time of such events, points to an internal magnetic field strength ~ 10^{16} G. Such strong fields are expected to be generated by a coherent alpha-Omega dynamo in the early seconds after the Neutron Star formation, if its spin period is of a few milliseconds at most. A substantial deformation of the NS is caused by such fields and a newborn millisecond-spinning magnetar would thus radiate for a few days a strong gravitational wave signal. Such a signal may be detected with Advanced LIGO-class detectors up to the distance of the Virgo cluster, where ~ 1 magnetar per year are expected to form. Recent X-ray observations reveal that SNRs around magnetar candidates do not show evidence for a larger energy content than standard SNRs (Vink & Kuiper 2006). This is at variance with what would be expected if the spin energy of the young, millisecond NS were radiated away as electromagnetic radiation andd/or relativistic particle winds and, thus, transferred quickly to the expanding gas shell. We show here that these recent findings can be reconciled with the idea of magnetars being formed with fast spins, if most of their initial spin energy is radiated thorugh GWs. In particular, we find that this occurs for essentially the same parameter range that would make such objects detectable by Advanced LIGO-class detectors up to the Virgo Cluster.
description: Proceedings of the Conference "Isolated Neutron stars: from the interior to the surface", Eds. D. Page, R. Turolla, S. Zane
Charming Charm, Beautiful Bottom, and Quark-Gluon Plasma in the Large Hadron Collider Era
Creators: name: Das, Santosh K.
name: Sahoo, Raghunath
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: After a few microseconds of the creation of our Universe through the Big Bang, the primordial matter was believed to be a soup of the fundamental constituents of matter -- quarks and gluons. This is expected to be created in the laboratory by colliding heavy nuclei at ultra-relativistic speeds. A plasma of quarks and gluons, called Quark-Gluon Plasma (QGP) can be created at the energy and luminosity frontiers in the Relativistic Heavy Ion Collider (RHIC), at Brookhaven National Laboratory, New York, USA, and the Large Hadron Collider (LHC) at CERN, Geneva, Switzerland. Heavy quarks, namely the charm and bottom quarks, are considered as novel probes to characterize QGP, and hence the produced Quantum Chromodynamics (QCD) matter. Heavy quark transport coefficients play a significant role in understanding the properties of QGP. Experimental measurements of nuclear suppression factor and elliptic flow can constrain the heavy quark transport coefficients, which are key ingredients for phenomenological studies, and they help to disentangle different energy loss mechanisms. We give a general perspective of the heavy quark drag and diffusion coefficients in QGP and discuss their potentials as probes to disentangle different hadronization mechanisms, as well as to probe the initial electromagnetic fields produced in non-central heavy-ion collisions. Experimental perspectives on future measurements are discussed with special emphasis on heavy-flavors as next-generation probes in view of new technological developments.
description: Published version in Current Science (Interdisciplinary journal published jointly by Current Science Association and Indian Academy of Sciences, Bengaluru)
title: Органикалық химия
Creators: name: ELS IPR BOOKS
Publisher: name: EDP Hub (Идипи Хаб), Профобразование
Year: 2024

description: Оқулықта органикалық заттарды анықтау және бөлу әдістері қарастырылған. Әр түрлі кластарға жататын органикалық қосылыстардың жалпы қасиеттері және жеке заттардың ерекше реакциялары көрсетілген. «Химия», «Органикалық химия» пәндерін оқитын «Химиялық инженерия және процесс» мамандықтарының техникалық және кәсіптік білім беру студенттеріне арналған.
Correlation effects in partially ionized mass asymmetric electron-hole plasmas
Creators: name: Filinov, V. S.
name: Fehske, H.
name: Bonitz, M.
name: Fortov, V. E.
name: Levashov, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The effects of strong Coulomb correlations in dense three-dimensional electron-hole plasmas are studied by means of unbiased direct path integral Monte Carlo simulations. The formation and dissociation of bound states, such as excitons and bi-excitons is analyzed and the density-temperature region of their appearance is identified. At high density, the Mott transition to the fully ionized metallic state (electron-hole liquid) is detected. Particular attention is paid to the influence of the hole to electron mass ratio $M$ on the properties of the plasma. Above a critical value of about M=80 formation of a hole Coulomb crystal was recently verified [Phys. Rev. Lett. {\bf 95}, 235006 (2005)] which is supported by additional results. Results are related to the excitonic phase diagram of intermediate valent Tm[Se,Te], where large values of $M$ have been observed experimentally.
description: slightly modified and shortened paper to appear in Physical Review E; contains more detailed presentation of theory (appendices)