cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Density-Functional-Theory Calculations of Matter in Strong Magnetic Fields: II. Infinite Chains and Condensed Matter
Creators: name: Medin, Zach
name: Lai, Dong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new, ab initio calculations of the electronic structure of one-dimensional infinite chains and three-dimensional condensed matter in strong magnetic fields ranging from B=10^12 G to 2x10^15 G, appropriate for observed magnetic neutron stars. At these field strengths, the magnetic forces on the electrons dominate over the Coulomb forces, and to a good approximation the electrons are confined to the ground Landau level. Our calculations are based on the density functional theory, and use a local magnetic exchange-correlation function appropriate in the strong field regime. The band structures of electrons in different Landau orbitals are computed self-consistently. Numerical results of the ground-state energies and electron work functions are given for one-dimensional chains of H, He, C, and Fe. Fitting formulae for the B-dependence of the energies are also provided. For all the field strengths considered in this paper, hydrogen, helium, and carbon chains are found to be bound relative to individual atoms (although for B less than a few x 10^12 G, the relative binding between C and C_infinity is small). Iron chains are significantly bound for B>10^14 G and are weakly bound if at all at B<10^13 G. We also study the cohesive property of three-dimensional condensed matter of H, He, C, and Fe at zero pressure, constructed from interacting chains in a body-centered tetragonal lattice. Such three-dimensional condensed matter is found to be bound relative to individual atoms, with the cohesive energy increasing rapidly with increasing B.
description: 32 pages, 18 figures. Minor changes, figure omissions. Phys. Rev. A in press
Smooth nonnegative tensor factorization for multi-sites electrical load monitoring
Creators: name: Durand, Amaury
name: Roueff, François
name: Jicquel, Jean-Marc
name: Paul, Nicolas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The analysis of load curves collected from smart meters is a key step for many energy management tasks ranging from consumption forecasting to customers characterization and load monitoring. In this contribution, we propose a model based on a functional formulation of nonnegative tensor factorization and derive updates for the corresponding optimization problem. We show on the concrete example of multi-sites load curves disaggregation how this formulation is helpful for 1) exhibiting smooth intraday consumption patterns and 2) taking into account external variables such as the outside temperature. The benefits are demonstrated on simulated and real data by exhibiting a meaningful clustering of the observed sites based on the obtained decomposition.
A Twistor Space Action for Yang-Mills Theory
Creators: name: Popov, Alexander D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the twistor space ${\cal P}^6\cong{\mathbb R}^4{\times}{\mathbb C}P^1$ of ${\mathbb R}^4$ with a non-integrable almost complex structure ${\cal J}$ such that the canonical bundle of the almost complex manifold $({\cal P}^6, {\cal J})$ is trivial. It is shown that ${\cal J}$-holomorphic Chern-Simons theory on a real $(6|2)$-dimensional graded extension ${\cal P}^{6|2}$ of the twistor space ${\cal P}^6$ is equivalent to self-dual Yang-Mills theory on Euclidean space ${\mathbb R}^4$ with Lorentz invariant action. It is also shown that adding a local term to a Chern-Simons-type action on ${\cal P}^{6|2}$, one can extend it to a twistor action describing full Yang-Mills theory.
description: 18 pages; v2: clarifying comments and a reference added, published version
Tests of the Higgs properties at the next colliders
Creators: name: Djouadi, Abdelhak
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the tests of the fundamental properties of the Standard Model Higgs boson that can be performed in the next round of experiments.
description: 8 pages, 4 figures. Talk presented at PLC2005 Warsaw and Kazimierz Lectures, 5/09-08/09 2005
Blazars and Gamma Ray Bursts
Creators: name: Ghisellini, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Blazars and Gamma Ray Bursts (GRBs) are the fastest objects known so far. The radiation we see from these sources originates in a jet of similar aperture angle, and we think it is the result of the conversion of some of the jet kinetic energy into random motion of the emitting particles. Mechanisms for producing, collimating and accelerating the jets in these sources are uncertain, and it is fruitful to compare the characteristics of both class of sources in search of enlightening similarities. I discuss some general characteristics of blazars and GRBs such as the power of their jets compared with what they can extract through accretion, and the dissipation mechanism operating in the jets of both classes of sources. In both classes, there is a well defined trend between the bolometric power and the frequency at which this power is mainly emitted, but blazars are "redder when brighter", while GRBs are "bluer when brighter". Finally, I discuss some recent exciting prospects to use blazars to put constraints on the cosmic IR-Optical-UV backgrounds, and to use GRBs as standard candles to measure the Universe.
description: 15 pages, 6 figures; invited talk at the VI Microquasar Workshop: " Microquasars and beyond" Como, September 2006
MOESM1 of A lil3 chlp double mutant with exclusive accumulation of geranylgeranyl chlorophyll displays a lethal phenotype in rice
Creators: name: Li, Chunmei
name: Liu, Xin
name: Pan, Jihong
name: Guo, Jia
name: Wang, Qian
name: Chen, Congping
name: Li, Na
name: Zhang, Kuan
name: Yang, Bin
name: Sun, Changhui
name: Deng, Xiaojian
name: Wang, Pingrong
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Developmental Biology
subject: Hematology
subject: Plant Biology
subject: Computational Biology

description: Additional file 1: Figure S1. Chlorophyll composition of the 637ys mutant and its wild-type ZH11. (a) and (b) Elution profiles detected at 660â nm by using HPLC. (c) Absorption spectrum of peaks 1, 6 and 7 in acetone. (d) Absorption spectrum of peaks 2, 3, 4 and 5 in acetone. Peaks 2, 3, 4, and 5 represent Chlphy a, ChlTHGG a, ChlDHGG a, and ChlGG a, respectively. Peaks 1, 6, and 7 represent Chlphy b, ChlDHGG b, and ChlGG b, respectively. (PDF 420 kb)
Matryoshka Phonon Twinning in alpha-GaN
Creators: name: Wei, Bin
name: Cai, Qingan
name: Sun, Qiyang
name: Su, Yaokun
name: Said, Ayman H.
name: Abernathy, Douglas L.
name: Hong, Jiawang
name: Li, Chen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Understanding lattice dynamics is crucial for effective thermal management in high-power electronic devices because phonons dominate thermal transport in most semiconductors. This study utilizes complementary inelastic X-ray and neutron scattering techniques and reports the temperature-dependent phonon dynamics of alpha-GaN, one of the most important third-generation power semiconductors. A prominent Matryoshka phonon dispersion is discovered with the scattering tools and confirmed by the first-principles calculations. Such Matryoshka twinning throughout the three-dimension reciprocal space is demonstrated to amplify the anharmonicity of the related phonon modes through creating abundant three-phonon scattering channels and cutting the phonon lifetime of affected modes by more than 50%. Such phonon topology effectively contributes to the reduction of the in-plane thermal transport, thus the anisotropic thermal conductivity of alpha-GaN. The results not only have significant implications for engineering the thermal performance and other phonon-related properties of alpha-GaN, but also offer valuable insights on the role of anomalous phonon topology in thermal transport of other technically important semiconductors.
description: 34 pages, 15 figures
Structure induction by lossless graph compression
Creators: name: Peshkin, Leonid
Publisher: name: arXiv
Year: 2007
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.2.6; G.2.2; E.1; E.4; F.4.2; G.2.3; I.3.5; I.4.2; I.5.3; J.3

description: This work is motivated by the necessity to automate the discovery of structure in vast and evergrowing collection of relational data commonly represented as graphs, for example genomic networks. A novel algorithm, dubbed Graphitour, for structure induction by lossless graph compression is presented and illustrated by a clear and broadly known case of nested structure in a DNA molecule. This work extends to graphs some well established approaches to grammatical inference previously applied only to strings. The bottom-up graph compression problem is related to the maximum cardinality (non-bipartite) maximum cardinality matching problem. The algorithm accepts a variety of graph types including directed graphs and graphs with labeled nodes and arcs. The resulting structure could be used for representation and classification of graphs.
description: 10 pages, 7 figures, 2 tables published in Proceedings of the Data Compression Conference, 2007
Symmetry meets AI
Creators: name: Barenboim, Gabriela
name: Hirn, Johannes
name: Sanz, Veronica
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We explore whether Neural Networks (NNs) can {\it discover} the presence of symmetries as they learn to perform a task. For this, we train hundreds of NNs on a {\it decoy task} based on well-controlled Physics templates, where no information on symmetry is provided. We use the output from the last hidden layer of all these NNs, projected to fewer dimensions, as the input for a symmetry classification task, and show that information on symmetry had indeed been identified by the original NN without guidance. As an interdisciplinary application of this procedure, we identify the presence and level of symmetry in artistic paintings from different styles such as those of Picasso, Pollock and Van Gogh.
description: 8 pages, 8 figures
Ανάλυση και Προσομοίωση Παθητικού Οπτικού Δικτύου (LAN-PON), με Χρήση Πρόβλεψης, σε Συνθήκες Ασύμμετρου Φόρτου
Creators: name: Τζίρογλου, Γεώργιος Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Οπτικά Δίκτυα
Παθητικά Οπτικά Δίκτυα
Χαμηλή Καθυστέρηση
Ασύμμετρη Κίνηση
Optical Networks
Passive Optical Networks
Low Latency
Asymmetric Traffic
Tactile Internet

description: Οι οπτικές επικοινωνίες έχουν βρει τρομερή απήχηση και άνθιση από τις αρχές του 21ου και δικαίως έχουν γίνει η βάση των σύγχρονων επικοινωνιών. Η ολοένα και μαζικότερη χρήση του διαδικτύου, καθώς και οι αυξημένες απαιτήσεις των τελικών χρηστών σε δαπανηρού εύρους ζώνης υπηρεσίες κατέστησαν απαραίτητη τη χρήση οπτικών δικτύων, μιας και είναι η μόνη σύγχρονη τεχνολογία που επιτρέπει τη μεταφορά δεκάδων Mbps ανά σύνδεση. Πρόσφατα, υιοθετήθηκε η χρήση παθητικών οπτικών δικτύων στο κομμάτι πρόσβασης, μιας και αποτελούν ένα φθηνό, ενεργειακά αποδοτικό και συνάμα αξιόπιστο εργαλείο για την εξυπηρέτηση του τελικού χρήστη. Μια ερευνητική τάση της τελευταίας πενταετίας προτείνει τη χρήση αυτής της τεχνολογίας σε υποδομές που χρήζουν ιδιαίτερα χαμηλές καθυστερήσεις για τα μεταφερόμενα πακέτα, όπως ένα νοσοκομείο. Η παρούσα εργασία έχει ως στόχο 1) την διερεύνηση μια τέτοιας πρότασης, 2) την εύρεση αδύναμων σημείων της και 3) την πρόταση μιας ολοκληρωμένης και λειτουργικής πλατφόρμας, η οποία θα μπορεί να λειτουργεί κάτω από συνθήκες ασυμμετρίας στον παραγόμενο φόρτο
description: Optical communications have found great success at the dawn of the 21st century and fairly have become the core of contemporary communications. The ongoing explosion in Internet usage, as well as the growing demands for bandwidth have rendered optical networks as the lonely technology capable of successfully delivering hundreds of Mbps per connection. Recently, passive optical networks have been proposed as an access technology, since they can provide cheap, energy efficient and reliable services for the final user. A hot research trend is to install such infrastructure in areas where ultra-low delays are essential for transferred packets, such as a hospital. This diploma thesis aims for 1) investigating such a topology, 2) finding its weak spots and 3) suggesting a viable solution which can accommodate services, even from asymmetric sources of traffic
Mechanics and energetics of ground effect in flapping flight
Creators: name: Cueva Salcedo, Horacio Jesus De La
Publisher: name: University of British Columbia
Year: 2008

description: Ground effect (GE) is an interaction between a wing and a surface that increases lift and reduces induced drag, stalling, minimum power, and maximum range speeds (Vstall, Vmp,Vmr, respectively). Four bird species utilising GE during flapping flight were studied: Double-Crested Cormorants (Pholacrocoraz auritus) at Mandarte Island B.C., Brown Pelicans (Pelecarius occideniali.s) at Ensenada Méico, Black Skimmers (Rynchops niger) at San Diego California, and Barn Swallows (Hirundo rstica) at Ladner, Williams Lake, and English Buff, B.C. Films were taken at 60—64 Hz in nature and digitised for vertical wing displacement analysis. Flight speeds of swallows and cormorants were measured with a Doppler radar. Best-fit sinusoids of dicular-linear regression (Batschelet 1981), periodic ANOVA (Bliss 1970), and Fourier series (Lighthill 1958, Bloomfield 1976) were used to describe vertical wing movement. Linearised sinusoids were used to show vertical wing displacement and average height of wings above the surface. Methods of evaluating GE for fixed wings were compared to determine simple, realistic calculations for flapping flight. Average interference coefficients were used to evaluate the influence of GE, utilising the theory of Reid (1932). Results were compared to those for oscillating (Katz 1985 ) and banking wings (at an angle to the horizontal) (Binder 1977). The effect of GE on the daily energy balance (DEB) was evaluated in cormorants. DEBs were constructed considering GE, metabolic, reproductive, and fight costs. Power curves were constructed using fixed-wing quasi-steady aerodynamic theory (Pennycuick 1975). Flight speeds Vmp=10.9 ms-1 out of ground effect (OGE), 6 ms-1, in GE (IGE), arid Vmr=16.3 ms-1 OGE, 15.4 ms-1 IGE and flight costs IGE and OGE of cormorants were compared to speeds measured during the 1987 and 1988 reproductive seasons. Cormorants observed at Mandarte Island obtain savings of up to 40% of total power when flying in GE. If cormorants fly with a fixed cargo per trip (0.3 kg) from the feeding site to the nest the predicted number of trips per day is 3—4 as observed by Robertson (1971). Cost of Transport (cost of moving a unit weight a unit distance) was compared for flights IGE and OGE, with and without a load. Foraging radius (Pennycuick, 1979) calculates maximum distance travelled on available energy. Foraging radii ICE and OGE of double-crested cormorants limit potential food sources. Flight IGE is significantly cheaper than OGE for the double-crested cormorant. Flight energy expenditures were compared for the four species. Swallows and skimmers show savings of up to 50% when IGE, but most savings are obtained only at speeds <8 ms-1. Cormorants and pelicans showed energy savings going from 5% at speeds > 15 ms-1 to 20% at speeds <8 ms-1
title: Antichità egizie e Italia
title: Prospettive di ricerca e indagini sul campo
titleType: Subtitle
Creators: name: M. Ciampini, Emanuele
name: Zanovello, Paola
Publisher: name: Edizioni Ca' Foscari - Digital Publishing
Year: 2015

description: Il volume raccoglie i contributi presentati nel corso di un convegno sul tema delle antichità egizie e, più in generale, su ricerche condotte in Italia su temi legati alla cultura faraonica. L’incontro di competenze diverse ha saputo mettere in luce la molteplicità e, nello stesso tempo, l’interazione di discipline spesso distanti tra loro, accumunate dal rapporto con quel concetto astratto di bene culturale che costituisce uno dei temi centrali del dibattito attuale sulla memoria e l’identità
description: Antichistica, volume 6
Thermal equilibrium states and instability of self-gravitating particles in an asymptotically AdS spacetime
Creators: name: Asami, Hiroki
name: Yoo, Chul-Moon
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the existence and the stability of spherically symmetric thermal equilibrium states of the self-gravitating many-particle system which satisfies the Einstein-Vlasov equations with a negative cosmological constant. While a thermal equilibrium state of the self-gravitating particle system cannot have a finite mass without an artificial wall in the asymptotically flat case, in the asymptotically AdS case, the total mass can be finite without any artificial wall due to the AdS potential barrier. In this case, the typical size of the system is characterized by the AdS radius. The equilibrium states can be parametrized by two independent parameters. Taking the total rest mass as the unit and fixing the AdS radius, we obtain the one-parameter family of equilibria which describes a curve in the parameter space spanned by the gravothermal energy and the temperature. Then we investigate the instability of the system based on the turning point method for each value of the AdS radius. We find that the curve typically has a double spiral structure as in the asymptotically flat case with an artificial wall. The possible value of the gravothermal energy is restricted to the finite region between the first turning points on the two respective spirals.
description: 12 pages
Το βίωμα της απώλειας του πατέρα στην παιδική ηλικία και την εφηβεία μέσα από αφηγήσεις ενηλίκων: Μία ερμηνευτική φαινομενολογική ανάλυση
Creators: name: Μπιρμπίλη-Καραλέκα Αλεξάνδρα, Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: απώλεια πατέρα
πένθος
βίωμα της απώλειας στην παιδική ηλικία
mourning
father’s death
experiencing death in childhood

description: Η παρούσα μελέτη διερευνά το βίωμα της απώλειας του πατέρα στην παιδική και εφηβική ηλικία μέσα από αφηγήσεις ενηλίκων, εστιάζοντας σε μία προσπάθεια να φωτίσει πολύπλευρα τις εμπειρίες των ενηλίκων διαχρονικά. Στοχεύει να ερευνήσει το ρόλο που ενδεχομένως διαδραμάτισαν στο βίωμα της απώλειας, ο τρόπος θανάτου του γονέα, η παροχή ή η απουσία υποστήριξης από το οικογενειακό περιβάλλον καθώς και να μελετήσει τις ποικίλες εκφάνσεις και τρόπους διεργασίας της εμπειρίας της απώλειας από την παιδική ηλικία των συμμετεχουσών έως σήμερα. Το δείγμα αποτέλεσαν πέντε γυναίκες που βίωσαν την απώλεια πατέρα στην παιδική ηλικία. Πραγματοποιήθηκαν ημι-δομημένες συνεντεύξεις οι οποίες διεξήχθησαν και αναλύθηκαν αντλώντας από τις βασικές αρχές της Ερμηνευτικής Φαινομενολογικής Ανάλυσης (Interpretative Phenomenological Analysis, IPA). Τα αποτελέσματα της έρευνας, περιλαμβάνουν: την κομβική συμβολή της οικογένειας ως προς την επεξεργασία του θρήνου, τη συναισθηματική επιβάρυνση που βίωσαν οι συμμετέχουσες ή εξακολουθούν να βιώνουν και τους τρόπους με τους οποίους διεργάζονται την αισθητή απουσία του πατέρα και επαναδιαπραγματεύονται την απώλεια στο πέρασμα των χρόνων
description: The present study focuses on the narratives of adult women who talk about their experience of losing their father in their childhood or in their adolescence. The main focus includes three aspects which are: the way or the reason of parent’s death and its possible impact in the process of mourning, the presence or the absence of a supportive environment for the child after the death and the ways in which these women experienced their feelings and the new facts in their lives throughout this time, from their childhood to their adulthood. Five women took part in this research and all of them had lost their father in their early childhood or in their adolescence. They gave a complete semi-structured interview which lasted from one to two hours. These interviews were conducted and analysed according to the principles of IPA (Interpretative Phenomenological Analysis). The most important aspects that emerged from the analysis included the role of family after parent’s death, the emotional difficulties that these women confront more or less until today and the ways through which they try to renegotiate in cognitive and emotional level the present situation of living without father and the lost of their father itself.
Lattice Dynamics of Metal-Organic Frameworks (MOFs): Neutron Inelastic Scattering and First-Principles Calculations
Creators: name: Zhou, W.
name: Yildirim, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By combining neutron inelastic scattering (NIS) and first-principles calculations, we have investigated the lattice dynamics of MOF5. The structural stability of MOF5 was evaluated by calculating the three cubic elastic constants. We find that the shear modulus, c44 = 1.16 GPA, is unusually small, while two other moduli are relatively large (i.e. c11 = 29.42 GPa and c12 = 12.56 GPa). We predict that MOF5 is very close to structural instability and may yield interesting new phases under high pressure and strain. The phonon dispersion curves and phonon density of states were directly calculated and our simulated NIS spectrum agrees very well with our experimental data. Several interesting phonon modes are discussed, including the softest twisting modes of the organic linker.
Coffea-casa: an analysis facility prototype
Creators: name: Adamec, Matous
name: Attebury, Garhan
name: Bloom, Kenneth
name: Bockelman, Brian
name: Lundstedt, Carl
name: Shadura, Oksana
name: Thiltges, John
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Data analysis in HEP has often relied on batch systems and event loops; users are given a non-interactive interface to computing resources and consider data event-by-event. The "Coffea-casa" prototype analysis facility is an effort to provide users with alternate mechanisms to access computing resources and enable new programming paradigms. Instead of the command-line interface and asynchronous batch access, a notebook-based web interface and interactive computing is provided. Instead of writing event loops, the column-based Coffea library is used. In this paper, we describe the architectural components of the facility, the services offered to end-users, and how it integrates into a larger ecosystem for data access and authentication.
description: Submitted as proceedings fo 25th International Conference on Computing in High-Energy and Nuclear Physics (https://indico.cern.ch/event/948465/)
Φροντίζοντας ένα παιδί του ιδρύματος: η εμπειρία των αποκλειστικών εθελοντριών του «Αγίου Στυλιανού»
Creators: name: Μαυρογιάννη, Στεφανία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ιδρυματική φροντίδα
Εθελοντισμός
Δημοτικό βρεφοκομείο
Institutional care
Volunteerism
Municipal nursery

description: Οι ευρέως διαδεδομένες αρνητικές επιπτώσεις της ιδρυματικής φροντίδας στα παιδιά κάνουν επιτακτική την ανάγκη δόμησης μιας σταθερής ποιοτικής σχέσης των εμπλεκόμενων ενηλίκων στα ιδρύματα με τα παιδιά. Σε αυτά τα πλαίσια, οι εθελοντές του Δημοτικού Βρεφοκομείου Θεσσαλονίκης «Ο Άγιος Στυλιανός» έχουν ως στόχο να βελτιώσουν τις συνθήκες διαβίωσης των παιδιών, προσφέροντας τους ποιοτικό χρόνο και ευκαιρίες για κοινωνικοποίηση. Στόχος της παρούσας διπλωματικής ήταν η διερεύνηση των εμπειριών των εθελοντριών του Αγίου Στυλιανού όταν καλούνται να αναλάβουν για τακτά χρονικά διαστήματα την αποκλειστική φροντίδα και έπειτα να αποχωριστούν ένα παιδί του ιδρύματος, λόγω της υιοθεσίας του ή της τοποθέτησης του σε άλλο ίδρυμα. Στην έρευνα συμμετείχαν 5 εθελόντριες, οι οποίες είχαν φροντίσει και αποχωριστεί τουλάχιστον ένα παιδί του ιδρύματος ανά τα χρόνια. Η έρευνα βασίστηκε στις ποιοτικές μεθόδους ανάλυσης και η συλλογή των δεδομένων έγινε με τη χρήση ημι-δομημένων συνεντεύξεων. Η ανάλυση των αποτελεσμάτων έγινε με τη μέθοδο της ερμηνευτικής φαινομενολογικής ανάλυσης (Interpretative Phenomenological Analysis, IPA). Τα αποτελέσματα μαρτυρούν μία ισχυρή σύνδεση που δημιουργείται ανάμεσα στην εθελόντρια και στο παιδί, η οποία ξεπερνάει τα όρια του εθελοντισμού, εξαρτάται από ποικίλους παράγοντες και επιφέρει αισθητές συνέπειες στον ψυχισμό των εθελοντριών
description: The widespread negative consequences of institutional care in children show the nesecity of forming constistent relationships among the children and the adults involving with them. In this consept, the voluteers of the Municipal Nursery “Agios Stylianos” aim to improve thw leaving contitions of thw chilfren, offering quality-time as well as opportunities for socialization. Thw aim of the particular thesis was to explore the experiences of the volunteers, when they are called to take care of a particular child an then to say goodbye, due to the adoption of the child or to the transaction to another institution. The participants were five women of different ages and backgrounds, which they were separated from the children they have take care of, at least once, over the few past years. The research was based in qualitative methods of analysis and for the data collection were used semi structured interviews. The result analysis was held with the method of Interpretative Phenomenological Analysis (IPA). The results demonstrate a strong and intimate relationship that is created between the volunteer and the child, which overcomes the borders of volunteerism, depends on various factors and leads to serious phychological consequences
NuSTAR observation of LS 5039
Creators: name: Volkov, Igor
name: Kargaltsev, Oleg
name: Younes, George
name: Hare, Jeremy
name: Pavlov, George
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: LS 5039 is a high-mass gamma-ray binary hosting a compact object of unknown type. NuSTAR observed LS 5039 during its entire 3.9 day binary period. We performed a periodic signal search up to 1000 Hz which did not produce credible period candidates. We do see the 9.05 s period candidate, originally reported by Yoneda et al. 2020 using the same data, in the Fourier power spectrum, but we find that the statistical significance of this feature is too low to claim it as a real detection. We also did not find significant bursts or quasi-periodic variability. The modulation with the orbital period is clearly seen and remains unchanged over a decade long timescale when compared to the earlier Suzaku light curve. The joint analysis of the NuSTAR and Suzaku XIS data shows that the 0.7-70 keV spectrum can be satisfactory described by a single absorbed power-law model with no evidence of cutoff at higher energies. The slope of the spectrum anti-correlates with the flux during the binary orbit. Therefore, if LS 5039 hosts a young neutron star, its X-ray pulsations appear to be outshined by the intrabinary shock emission. The lack of spectral lines and/or an exponential cutoff at higher energies suggests that the putative neutron star is not actively accreting. Although a black hole scenario still remains a possibility, the lack of variability or Fe K$α$ lines, which typically accompany accretion, makes it less likely.
description: Accepted to ApJ
Phase diagram of the t-U^2 Hamiltonian of the weak coupling Hubbard model
Creators: name: Yanagisawa, Takashi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We determine the symmetry of Cooper pairs, on the basis of the perturbation theory in terms of the Coulomb interaction $U$, for the two-dimensional Hubbard model on the square lattice. The phase diagram is investigated in detail. The Hubbard model for small $U$ is mapped onto an effective Hamiltonian with the attractive interaction using the canonical transformation: $H_{eff}=e^S He^{-S}$. The gap equation of the weak coupling formulation is solved without numerical ambiguity to determine the symmetry of Cooper pairs. The superconducting gap crucially depends on the position of the van Hove singularity. We show the phase diagram in the plane of the electron filling $n_e$ and the next nearest-neighbor transfer $t'$. The d-wave pairing is dominant for the square lattice in a wide range of $n_e$ and $t'$. The d-wave pairing is also stable for the square lattice with anisotropic $t'$. The three-band $d$-$p$ model is also investigated, for which the d-wave pairing is stable in a wide range of $n_e$ and $t_{pp}$ (the transfer between neighboring oxygen atoms). In the weak coupling analysis, the second-neighbor transfer parameter $-t'$ could not be so large so that the optimum doping rate is in the range of $0.8
description: 16 figures
Discovery of a z=6.1 Radio-Loud Quasar in the NDWFS
Creators: name: McGreer, Ian D.
name: Becker, Robert H.
name: Helfand, David J.
name: White, Richard L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: From examination of only 4 deg^2 of sky in the NOAO Deep Wide-Field Survey (NDWFS) region, we have identified the first radio-loud quasar at a redshift z>6. The object, FIRST J1427385+331241, was discovered by matching the FLAMEX IR survey to FIRST survey radio sources with NDWFS counterparts. One candidate z>6 quasar was found, and spectroscopy with the Keck II telescope confirmed its identification, yielding a redshift z=6.12. The object is a Broad Absorption Line (BAL) quasar with an optical luminosity of M_B ~ -26.9 and a radio-to-optical flux ratio ~ 60. Two MgII absorptions systems are present at redshifts of z=2.18 and z=2.20. We briefly discuss the implications of this discovery for the high-redshift quasar population.
description: 18 pages, 6 figures, accepted for ApJ
Additional file 1 of Variants of BEST1 and CRYBB2 cause a complex ocular phenotype comprising microphthalmia, microcornea, cataract, and vitelliform macular dystrophy: case report
Creators: name: Shi, Jie
name: Sun, Tengyang
name: Xu, Ke
name: Zhang, Xin
name: Li, Yang
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1.
MOESM2 of A lil3 chlp double mutant with exclusive accumulation of geranylgeranyl chlorophyll displays a lethal phenotype in rice
Creators: name: Li, Chunmei
name: Liu, Xin
name: Pan, Jihong
name: Guo, Jia
name: Wang, Qian
name: Chen, Congping
name: Li, Na
name: Zhang, Kuan
name: Yang, Bin
name: Sun, Changhui
name: Deng, Xiaojian
name: Wang, Pingrong
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Evolutionary Biology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Marine Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: Additional file 2: Figure S2. Phenotypic comparison of three-week-old seedlings grown in the growth chamber under low light (LL) or high light (HL) at constant temperature (23 °C or 30 °C). (a1), (a2), (b1), and (b2) Phenotypes of ZH11 and 637ys under 23 °C/LL, 30 °C/LL, 23 °C/HL, and 30 °C/HL, respectively. (c1), (c2), (d1), and (d2) Phenotypes of NP and 502ys under 23 °C/LL, 30 °C/LL, 23 °C/HL, and 30 °C/HL, respectively. (PDF 487 kb)
Additional file 2 of Variants of BEST1 and CRYBB2 cause a complex ocular phenotype comprising microphthalmia, microcornea, cataract, and vitelliform macular dystrophy: case report
Creators: name: Shi, Jie
name: Sun, Tengyang
name: Xu, Ke
name: Zhang, Xin
name: Li, Yang
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2.
การกำจัดก๊าซมีเทนทางชีวภาพที่หน้าดินกลบหลุมฝังกลบขยะ
Creators: name: วรางค์ลักษณ์ ซ่อนกลิ่น
Publisher: name: คณะวิศวกรรมศาสตร์ มหาวิทยาลัยนเรศวร
Year: 2553
Subjects: การกำจัด,ก๊าซมีเทน,หลุมฝังกลบขยะ

description: 2, 5, วิศวกรรมสาร มหาวิทยาลัยนเรศวร
Guiding the surgical gesture using an electro-tactile stimulus array on the tongue: A feasibility study
Creators: name: Robineau, Fabien
name: Boy, Frédéric
name: Orliaguet, Jean-Pierre
name: Demongeot, Jacques
name: Payan, Yohan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Medical Physics (physics.med-ph)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Under conventional "open-" surgery, the physician has to take care of the patient, interact with other clinicians and check several monitoring devices. Nowadays, the Computer Assisted Surgery proposes to integrate 3D cameras in the operating theatre in order to assist the surgeon in performing minimal-invasive surgical punctures. The cameras localize the needle and the computer guides the surgeon towards an intracorporeal clinically-defined target. A visualization system (screen) is employed to provide the surgeon with indirect visual spatial information about the intracorporeal positions of the needle. The present work proposes to use another sensory modality to guide the surgeon thus keeping the visual modality fully dedicated to the surgical gesture. For this, the sensory substitution paradigm using the Bach-y-Rita's "Tongue Display Unit" (TDU) is exploited to provide to the surgeon information of the position tool. The TDU device is composed of a 6x6 matrix of electrodes transmitting electrotactile information on the tongue surface. The underlying idea consists in transmitting information about the deviation of the needle movement with regard to a pre-planned "optimal" trajectory. We present an experiment assessing the guidance effectiveness of an intracorporeal puncture under TDU guidance with respect to the performance evidenced under a usual visual guidance system.
Text: A neighbor's funeral
Creators: name: Sales, Henry
name: Bertet, Denis
name: Garvin, Karee
name: Michael, Lev
name: Scott, Tessa
name: Wilbanks, Eric
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: mam

description: Two-minute long text in Mam with English translation in which the consultant recounts the time he attended the funeral of a neighbor. Lead elicitor: Lev Michael.
PSIXOLOGIK SALOMATLIK MUAMMOSINI XORIJ PSIXOLOGLARI TADQIQOTLARIDA TADQIQ ETILISHI
Creators: name: Yusupxodjayeva, U.B.
Publisher: name: Zenodo
Year: 2024

description: Psixologik salomatlik bugungi kunda psixologiyadagi eng muhim tushunchalardan biridir. Xorijiy va rus tadqiqotchilarning ilmiy izlanishlari mazkur masalaga bag‘ishlangan bo‘lib, ular sirasiga A.Maslou, V.Frankl, V.A.Ananev, I.V.Dubrovina, O.V.Xuxlaeva, V.E.Paxalyan va boshqalarning kiritishimiz mumkin. Ayniqsa, I.V.Dubrovinaning ilmiy izlanishlarida psixik va psixologik salomatlik o‘rtasidagi farqni ko‘rsatadi.
Short time scale pulse stability of the Crab pulsar in the optical band
Creators: name: Karpov, S.
name: Beskin, G.
name: Biryukov, A.
name: Debur, V.
name: Plokhotnichenko, V.
name: Redfern, M.
name: Shearer, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The fine structure and the variations of the optical pulse shape and phase of the Crab pulsar are studied on various time scales. The observations have been carried out on 4-m William Hershel and 6-m BTA telescopes with APD photon counter, photomultiplier based 4-channel photometer and PSD based panoramic spectrophotopolarimeter with 1$μ$s time resolution in 1994, 1999, 2003 and 2005-2006 years. The upper limit on the pulsar precession on Dec 2, 1999 is placed in the 10 s - 2 hours time range. The evidence of a varying from set to set fine structure of the main pulse is found in the 1999 and 2003 years data. No such fine structure is detected in the integral pulse shape of 1994, 1999 and 2003 years. The drastic change of the pulse shape in the 2005-2006 years set is detected along with the pulse shape variability and quasi-periodic phase shifts.
description: 4 pages, 6 figures. To appear in ApSS, in the proceedings of the conference "Isolated Neutron Stars: from the Interior to the Surface", London, April 2006; eds. D. Page, R. Turolla and S. Zane
A consistent two-skyrmion configuration space from instantons
Creators: name: Halcrow, Chris
name: Winyard, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: To study a nuclear system in the Skyrme model one must first construct a space of low energy Skyrme configurations. However, there is no mathematical definition of this configuration space and there is not even consensus on its fundamental properties, such as its dimension. Here, we propose that the full instanton moduli space can be used to construct a consistent skyrmion configuration space, provided that the Skyrme model is coupled to a meson. Each instanton generates a unique skyrmion and we reinterpret the $8N$ instanton moduli as physical degrees of freedom in the Skyrme model. In this picture a single skyrmion has six zero modes and two non-zero modes: one controls the overall scale of the solution and one the energy of the meson field. We study the $N=1$ and $N=2$ systems in detail. Two interacting skyrmions can excite the meson field through scattering, suggesting that the meson and Skyrme fields are intrinsically linked. Our proposal is the first consistent manifold description of the two-skyrmion configuration space. The method can also be generalised to higher $N$ and thus provides a general framework to study any skyrmion configuration space.
description: 21 pages, 14 figures
การลดสัญญาณรบกวนด้วยตัวกรองดิจิทัลแบบเรียบชนิดเอ็กซ์โปเนนเชียล
Creators: name: พฤทธพงศ์ เรืองฤทธิ์
name: สุชาติ  แย้มเม่น
Publisher: name: คณะวิศวกรรมศาสตร์ มหาวิทยาลัยนเรศวร
Year: 2553
Subjects: ตัวกรองดิจิทัลแบบเรียบชนิดเอกซ์โพเนนเชียล,การลดสัญญาณรบกวน

description: 2, 5, วิศวกรรมสาร มหาวิทยาลัยนเรศวร
The sizes of galaxy halos in galaxy cluster Abell 1689
Creators: name: Halkola, A.
name: Seitz, S.
name: Pannella, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The multiple images observed in galaxy cluster Abell 1689 provide strong constraints not only on the mass distribution of the cluster but also on the ensemble properties of the cluster galaxies. Using parametric strong lensing models for the cluster, and by assuming well motivated scaling laws between the truncation radius s and the velocity dispersion sigma of a cluster galaxy we are able to derive sizes of the dark matter halos of cluster galaxies. For the scaling law expected for galaxies in the cluster environment (s propto sigma), we obtain s = 64^{+15}_{-14} (sigma / 220 km/s) kpc. For the scaling law used for galaxies in the field with s propto sigma^2 we find s = 66^{+18}_{-16} (sigma / 220 km/s)^2 kpc. Compared to halos of field galaxies, the cluster galaxy halos in Abell 1689 are strongly truncated.
description: 12 pages, 4 figures. Accepted for publication in the ApJ
Temporal and spatial expression patterns of the hsp16 and ubq-1 genes in transgenic C. elegans
Creators: name: Durovic, Eve Gabrielle Stingham
Publisher: name: University of British Columbia
Year: 2008

description: The expression of the small 16 kDa heat shock protein gene (hspl6 ) family and of the polyubiquitin encoding gene (ubq-1) in Caenorhabditis elegans has been examined by introducing lacZ fusions into the nematode by transformation. Transcription of the hspl6-lacZ transgenes was totally heat shock dependent and resulted in the rapid synthesis of detectable levels of β-gaIactosidase in most somatic tissues. Although the two hspl6 gene pairs of C. elegans are highly similar within both their coding and non-coding sequences, quantitative and qualitative differences in the spatial pattern of expression between gene pairs were observed. The hspl6-48 promoter was shown to direct greater expression of β-galactosidase in muscle and hypodermis while the hspl6-41 promoter was more efficient in intestine and pharyngeal tissue. Transgenes which eliminated one promoter from a gene pair were expressed- at reduced levels, particularly in post-embryonic stages, suggesting that the heat shock elements (HSEs) in the intergenic region of an hspl6 gene pair may act cooperatively to achieve high levels of expression of both genes. The hspl6 gene pairs are never constitutively expressed. In addition, their heat inducibility is developmentally restricted; they are not heat inducible during gametogenesis or early embryogenesis. The hspl6 genes represent the first fully inducible system in C. elegans to be characterized in detail at the molecular level, and the promoters of these genes should be useful for studying the action of tissue or developmentally regulated genes in this organism. Animals carrying a translational ubq-1 construct consisting of 938 bp of ubq-1 upstream sequences fused to lacZ (ubq93S-lacZ) expressed β-galactosidase in embryos and in a tissue general manner in 20% of staining L1 larvae. Somatic expression in later stages was usually confined to body muscle. Progressively larger deletions extending from the 5’ end of ubq938-lacZ did not significantly alter the pattern of expression until 827 bp of sequence had been removed. Thus sequences upstream of the transcriptional start site, including a G/C rich block and a sequence resembling a TATA box (GAATAA) are not required for ubq-1 expression. Moreover, a basal level of expression was maintained in embryos when 903 bp had been deleted. These results suggest that some of the regulatory elements required for efficient expression of ubq-1 may reside within the transcribed region of the gene; alternatively they must lie more than 1.7 kb upstream or 0.8 kb downstream of this region. PCR analysis indicates that RNA molecules transcribed from the ubq938-IacZ and ubq 827-lacZ transgenes are trans-spliced to SL1, as is ubq—1 RNA.
Spectral index of synchrotron emission: insights from the diffuse and magnetised interstellar medium
Creators: name: Padovani, Marco
name: Bracco, Andrea
name: Jelić, Vibor
name: Galli, Daniele
name: Bellomi, Elena
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The interpretation of Galactic synchrotron observations is complicated by the degeneracy between the strength of the magnetic field perpendicular to the line of sight (LOS), $B_\perp$, and the cosmic-ray electron (CRe) spectrum. Depending on the observing frequency, an energy-independent spectral energy slope $s$ for the CRe spectrum is usually assumed: $s=-2$ at frequencies below $\simeq$400 MHz and $s=-3$ at higher frequencies. Motivated by the high angular and spectral resolution of current facilities such as the LOw Frequency ARray (LOFAR) and future telescopes such as the Square Kilometre Array (SKA), we aim to understand the consequences of taking into account the energy-dependent CRe spectral energy slope on the analysis of the spatial variations of the brightness temperature spectral index, $β$, and on the estimate of the average value of $B_\perp$ along the LOS. We illustrate analytically and numerically the impact that different realisations of the CRe spectrum have on the interpretation of the spatial variation of $β$. We find that the common assumption of an energy-independent $s$ is valid only in special cases. We show that for typical magnetic field strengths of the diffuse interstellar medium ($\simeq$2$-$20 $μ$G), at frequencies of 0.1$-$10 GHz, the electrons that are mainly responsible for the synchrotron emission have energies in the range $\simeq$100 MeV$-$50 GeV. This is the energy range where the spectral slope, $s$, of CRe has its greatest variation. We also show that the polarisation fraction can be much smaller than the maximum value of $\simeq 70\%$ because the orientation of ${\bf B}_\perp$ varies across the telescope's beam and along the LOS. Finally, we present a look-up plot that can be used to estimate the average value of $B_\perp$ along the LOS from a set of values of $β$ measured at centimetre to metre wavelengths, for a given CRe spectrum.
description: 12 pages, 11 figures, accepted by A&A