cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Αυτόματη κατηγοριοποίηση εικόνων με βάση το περιεχόμενο
Creators: name: Παπαρρίζου, Αναστασία Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Κατάτμηση εικόνας
Τοπικά/καθολικά χαρακτηριστικά Πρωτοέννοιες
Ταξινόμηση
Μηχανές διανυσμάτων υποστήριξης
Image segmentation
Local/globar features
Protoconcepts
Classification
Support Vector Machines

description: Η κεντρική ιδέα της παρούσας εργασίας είανι η αυτόματη ταξινόμηση ενός συνόλου εικόνων σε 101 θεατικές κατηγορίες με βάση τα χαμηλού επιπέδου το πικά χαρακτηριστικά τους.Αρχικά, γίνεται κατάτμηση των εικόνων με τον αλγόριθμο Normalized Cuts σε ένα πλήθος περιοχών. Από κάθε περιοχή εξάγονται κάποια χαρακτηριστική για το χρώμα, την υφή και το σχήμα, τα οποία χρησιμοποιούνται για την εξαγωγή του διανύσματος χαρακτηριστικών (feature-vector) της κάθε εικόνας.Από αυτές τις εναλλακτηκές κατατμήσεις επιλέγεται αυτή της οποίας τα χαρακτηριστικά ικανοποιούν κάποια κριτήρια ομοιογένειας της κάθε περιοχής για τη βελτιστοποίηση της κατάτμησης. Στη συνέχεια εξάγεται ένα καθολικό διάνυσμα χαρακτηριστικών για την κάθε εικόνα που προκύπτει από τη σύγκριση των διανυσμάτων των τοπικών χαρατηριστικών με τα διανύσματα χαρακτηριστικών των εικόνων, που ανήκουν σε ένα πλήθος διαφορετικών κατηγοριών (πρωτοέννοια-protoconcepts). Αυτό το διάνυσμα, που εκφράζει το βαθμό σχετικότητας της εικόνας με την πρωτο-έννοια, χρησιμοπιείται για τη δημιουργία του μοντέλου ταξινόμησης.με χρήση των Μηχανών Διανυσμάτων Υποιστήριξης (Support Vector Machine), που είναι ένας αποτελεσματικός αλγόριθμος επιβλεπόμενης μηχανικής μάθησης (supervised machine learning). Μετά την εκπαίδευση (training) του μοντέλου ακολουθεί η επαλήθευση (testing) για να διαπιστωθεί η αποοτελεσματικότητας της μεθόδου.
description: This graduate work presents an automatic content based image classification approach to 101 concepts, based on the low-level local and global features of images of TRECVID database. First, the images are segmented into a number of segments by Normalized-cuts algorithm in order to extract local features. Color, texture and shape descriptors of each region are combined to create a feature-vector of each image. In order to optimize the segmentation, we use the feature-vector that fulfills some homogeneity measures. A global feature extraction is handled from 15 proto-concept images, that will be compared with the previous local feature-vectors to compose a similarity metric array of each image to every proto-concept. These similarities build up the models of a Support Vector Machine (SVM) classifier. Experimental results demonstrate that the proposed classification scheme and feature selection method are effective for high-level image classification task and efficient in more concepts, thus achieving high precision.
description: Σε συνεργασία με το τμήμα Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
The cultural adaptation of Japanese college students in a study abroad context : an ethnographic study
Creators: name: Segawa, Megumi
Publisher: name: University of British Columbia
Year: 2009

description: Using ethnographic methods, namely in-depth interviews and participant-observation, I examined the everyday experiences of fifteen female Japanese students during a nine-month study abroad. I attempted to investigate (1) the nature of cultural learning in the participants of this study during their sojourn and (2) how different social networks in the sojourn context affected the processes of their cultural learning and adaptation to the host environment. I employed models of cross-cultural adaptation based on a perspective of cultural learning / social skill acquisition as a theoretical framework. During the first few months in Canada, students without previous international sojourn experiences seemed to be physically and emotionally vulnerable. Some students experienced emotional upheaval which was consistent with previously published accounts of the characteristics of the sojourner adaptation process. A close association of the Japanese within their group throughout their sojourn resulted in the formation of an ethnic enclave in the dormitory community. This provided a support network for most of the Japanese students, but at the same time, caused interpersonal conflicts in the group. The strong group solidarity also negatively affected the relationship between the Japanese students and their Canadian peers in the dormitory. The Japanese students in this study not only had to adapt to the socio-cultural characteristics of the host environment, but also to the norms and values of their own group which reflected their cultural heritage. Although they encountered a number of challenges while in Canada, the process of overcoming difficulties and absorbing new experiences enabled them to grow personally and intellectually. Towards the end of their sojourn and after returning to Japan, the students recognised positive changes in their attitude and behaviour which they attributed to the different experiences they had through their study abroad. While several findings of the study indicated that the participants' adaptation to the new cultural setting reflected theoretical propositions in the cross-cultural adaptation literature, the study also showed how the unique nature of the students' sojourn environment had a significant impact on their adaptation process.
Absolute Measurement of Hadronic Branching Fractions of the D_s^+ Meson
Creators: name: CLEO Collaboration
name: Alexander, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The branching fractions of D_s meson decays serve to normalize many measurements of processes involving charm quarks. Using 298 /pb of e+ e- collisions recorded at a center of mass energy of 4.17 GeV, we determine absolute branching fractions for eight D_s decays with a double tag technique. In particular we determine the branching fraction B(D_s -> K- K+ pi+) = (5.50 +- 0.23 +- 0.16)%, where the uncertainties are statistical and systematic respectively. We also provide partial branching fractions for kinematic subsets of the K- K+ pi+ decay mode.
description: 6 pages, postscript also available through http://www.lns.cornell.edu/public/CLNS/2007/, revised
Transcription of a discussion the people of Xahslin-ding
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio files VP-090921-02a/c and VP-090921-03: Transcription of a discussion the people of Xahslin-ding, file VP-260711-01, from 8:12 to 14:20 (VP-090921-02a/c) and from 14:20 to the end of the file (VP-090921-03).
Modéliser le physique pour comprendre le contrôle : le cas de l'anticipation en production de parole
Creators: name: Perrier, Pascal
name: Payan, Yohan
name: Marret, Romain
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: This chapter introduces numerical simulations provided by a 2D biomechanical model of the tongue. These simulations help in understanding the influence of the lingual mechanical characteristics onto the anticipation phenomena that are measured on acoustic and articulatory speech data.
Linear and Non Linear Effects on the Newtonian Gravitational Constant as deduced from the Torsion Balance
Creators: name: Rossi, Michele
name: Zaninetti, Lorenzo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Classical Physics (physics.class-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: The Newtonian gravitational constant has still 150 parts per million of uncertainty. This paper examines the linear and nonlinear equations governing the rotational dynamics of the torsion gravitational balance. A nonlinear effect modifying the oscillation period of the torsion gravitational balance is carefully explored.
description: 11 pages, 2 figures
Evaluating soft tissue simulation in maxillofacial surgery using pre and post-operative CT scan
Creators: name: Chabanas, Matthieu
name: Marecaux, Christophe
name: Chouly, Franz
name: Boutault, Franck
name: Payan, Yohan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: One of the most important issue in soft tissue modeling is to assess the quality of the simulations. A validation protocol is presented based on two CT scans of the patient acquired before and after cranio-maxillofacial surgery. The actual bones repositioning realized during the intervention are accurately measured and reproduced. A evaluation of the soft tissue deformation is then computed using a finite element model of the face. The simulations are therefore compared, qualitatively and quantitatively, with the actual outcome of the surgery. This protocol enable to rigorously evaluate different modeling methods, and to assess the clinical relevance of soft tissue simulation in maxillofacial surgery.
Kommuniqué der 3. Begegnung im bilateralen Theologischen Dialog zwischen der Russischen Orthodoxen Kirche und der Evangelischen Kirche in Deutschland nach dem Neubeginn in Bad Urach (Bad Urach III)
Creators: name: Timofeev, German
name: Koppe, Rolf
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 51 Nr. 4 (2002): Ökumenische Rundschau, Band 51, Heft 4
Experimental realization of phonon demultiplexing in three-dimensions
Creators: name: Bilal, Osama R.
name: Yee, Chern Hwee
name: Rys, Jan
name: Schumacher, Christian
name: Daraio, Chiara
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Phononic metamaterials enabled the realization of many acoustic components analogous to their electronic counterparts, such as transistors, logic gates and calculators. A key component among these is the demultiplexer, a device that receives multiple signals and sorts them based on their frequencies into separate channels. Previous experimental realizations of acoustic and elastic multiplexers have employed plates with pillars or holes to demultiplex frequencies. However, existing realizations are confined to two-dimensions, which can limit potential acoustic or elastic circuit design. Here we show the first experimental realization of a three-dimensional, four channel phononic demultiplexer. Our design methodology is based on bundles of pass-bands within a large band gap that can easily be tuned for multi-channel frequency demultiplexing. The proposed design can be utilized in acoustic and elastic information processing, nondestructive evaluation and communication applications among others.
Gas giant-like zonal jets in the laboratory
Creators: name: Lemasquerier, Daphné
name: Favier, Benjamin
name: Bars, Michael Le
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: This paper is associated with a poster winner of a 2019 American Physical Society Division of Fluid Dynamics (DFD) Milton van Dyke Award for work presented at the DFD Gallery of Fluid Motion. The original poster is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/APS.DFD.2019.GFM.P0015.
Entanglement-Assisted Absorption Spectroscopy
Creators: name: Shi, Haowei
name: Zhang, Zheshen
name: Pirandola, Stefano
name: Zhuang, Quntao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Spectroscopy is an important tool for probing the properties of materials, chemicals and biological samples. We design a practical transmitter-receiver system that exploits entanglement to achieve a provable quantum advantage over all spectroscopic schemes based on classical sources. To probe the absorption spectra, modelled as pattern of transmissivities among different frequency modes, we employ broad-band signal-idler pairs in two-mode squeezed vacuum states. At the receiver side, we apply photodetection after optical parametric amplification. Finally, we perform a maximal-likehihood decision test on the measurement results, achieving orders-of-magnitude-lower error probability than the optimum classical systems in various examples, including `wine-tasting' and `drug-testing' where real molecules are considered. In detecting the presence of an absorption line, our quantum scheme achieves the optimum performance allowed by quantum mechanics. The quantum advantage in our system is robust against noise and loss, which makes near-term experimental demonstration possible.
description: 6+16 pages, 6+13 figures, accepted by Phys. Rev. Lett
A desire to inquire : children experience science as adventure
Creators: name: Mueller, Andrea Christiane
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this study is to explore and document the nature of children's participation in elementary school science in British Columbia, Canada. Using an ethnographic approach, extensive fieldnotes provide the foundation addressing the question "What is the activity of science in an elementary school?" Although current science curriculum documents continue to cast science at school as a possible mirror of science in the 'real' world, this is a thesis about elementary school science and a community of inquiry that evolves at school. Instead of separating process and content, this thesis emphasizes their co-emergence. Drawing upon sociocultural and enactivist perspectives, the focus is on learning and context, learner and content as they co-evolve. This study was conducted in one elementary class at the intermediate level (Grade 6/7) across one school year. The teacher and I collaborated to plan and teach science with a focus on creating opportunities for children to participate. Children embarked on three extensive science adventures with their teacher, working in teams of four or five and learning as a community of inquiry. Using audio taped records of children's and the teacher's comments, children's creations, as well as my fieldnotes, I construct a narrative of one year of school science. Researcher, children, and teacher describe what it means to participate in a diversity of ways and, if we wish to understand how children learn science it is important to listen. Data analysis reveals the importance of contexts for participation in elementary school science. In particular, I identify "spaces of inquiry" that afforded students diverse opportunities to participate with science content in a community of inquiry. They are generative spaces, rehearsal spaces, and performative spaces. Spaces of inquiry are important because they provide an alternative way to think about learning and teaching science, they provide opportunities for designing collaborative group work, and they challenge educators to consider children's contributions to their science learning. Overall, this ethnographic study illustrates a dynamic interdependence of learners and their environment in this open-ended, creative adventure in and through school science.
Minutes of meeting of the Trustees of the Winfield and Okanagan Centre Irrigation District, September 19, 1944
Creators: name: Trustees Of The Winfield And Okanagan Centre Irrigation District
Publisher: name: The University of British Columbia
Year: 2017

description: Minutes of meeting of the Trustees of the Winfield and Okanagan Centre Irrigation District, dated September 19, 1944, regarding domestic water.
Reproduction of hypopnea phenomenon using a physical and numerical model
Creators: name: Chouly, Franz
name: Van Hirtum, Annemie
name: Lagrée, Pierre-Yves
name: Pelorson, Xavier
name: Payan, Yohan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Obstructive sleep apnea syndrome is now considered as a major health care topic. An in-vitro setup which reproduces and simplifies upper airway geometry has been the basis to study the fluid/walls interaction that leads to an apnea. It consists of a rigid pipe (the pharynx) in contact with a deformable latex cylinder filled with water (the tongue). Air flows out of the rigid pipe and induces pressure forces on the cylinder. We present a numerical model of this setup: a finite element model of the latex cylinder is in interaction with a fluid model. Simulation of an hypopnea (partial collapsus of the airway) has been possible and in agreement with observations from the in-vitro setup. The same phenomenon has been simulated on a soft palate model obtained from a patient sagittal radiography. These first results encourage us to improve the model so as it could reproduce the complete apnea phenomenon, and be used for a planification purpose in sleep apnea surgery.
Μελέτη των μηχανισμών ηλεκτρικής αγωγιμότητας του πολυκρυσταλλικού LimgVo4
Creators: name: Παρασκευά, Χρυσή Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Μετρήσεις σύνθετης αντίστασης
Ιοντική αγωγιμότητα
Ισοδύναμα κυκλώματα
LiMgVo4
Solid state reaction
Impedance spectroscopy measurements
Equivalent circuits
Ionic conductivity

description: Το υλικό LiMgVO4 παρασκευάσθηκε με αντίδραση στερεάς κατάστασης στους 650 ºC για 4 ημέρες. Έγιναν μετρήσεις σύνθετης αντίστασης σε δισκία του υλικού σε θερμοκρασίες από 25 έως 500 ºC ανά βήματα των 25 °C. Χρησιμοποιώντας τα αποτελέσματα των μετρήσεων, σχεδιάστηκαν ισοδύναμα κυκλώματα, όπου κάθε στοιχείο αντιπροσωπεύει μια μοναδική διαδικασία αγωγιμότητας μέσα στο υλικό. Χρησιμοποιώντας τις τιμές των στοιχείων των ισοδυνάμων κυκλωμάτων σχεδιάσθηκαν τα διαγράμματα Arrhenius και υπολογίσθηκαν οι ενέργειες ενεργοποίησης των υπαρχουσών μηχανισμών αγωγιμότητας του υλικού. Η ενέργεια ενεργοποίησης στο εσωτερικό των κόκκων(bulk) βρέθηκε ότι είναι 0.62 eV, ενώ η ενέργεια ενεργοποίησης δια μέσου των ορίων των κόκκων(across grain boundaries) βρέθηκε ότι είναι 0.62 eV και η ενέργεια ενεργοποίησης κατά μήκος των ορίων των κόκκων(along grain boundaries) βρέθηκε 1.03 eV εως τους 175 οC και 0.50 eV από τους 200 έως τους 500 οC
description: The compound LiMgVO4 was prepared by solid state reaction at 650 oC for 4 days. Impedance spectroscopy measurements were taken at pellets of the materials at temperatures from 25 to 500 oC with 25 oC steps. The results of the measurements were used to draw equivalent circuits. Each element of these equivalent circuits was assigned to a unique conduction process within the material. Arrhenius plots were drawn of each element of the equivalent circuits and the activation energies of the conduction mechanisms were calculated. The Ea of the bulk conductivity was found to be 0.62 eV and the across grain boundaries 1.03 eV up to 175 oC and 0.50 eV from 200 to 500 oC .
description: Σε συνεργασία με το Ινστιτούτο Τεχνολογίας Γκρενόμπλ (Γαλλία), το ΕΚΕΦΕ Δημόκριτος, και το CNRS (Centre National de la Researche Scientifique, Γαλλία)
A heuristic derivation of the uncertainty of the frequency determination in time series data
Creators: name: Kallinger, T.
name: Reegen, P.
name: Weiss, W. W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: Several approaches to estimate frequency, phase and amplitude errors in time series analyses were reported in the literature, but they are either time consuming to compute, grossly overestimating the error, or are based on empirically determined criteria. Aims: A simple, but realistic estimate of the frequency uncertainty in time series analyses. Methods: Synthetic data sets with mono- and multi-periodic harmonic signals and with randomly distributed amplitude, frequency and phase were generated and white noise added. We tried to recover the input parameters with classical Fourier techniques and investigated the error as a function of the relative level of noise, signal and frequency difference. Results: We present simple formulas for the upper limit of the amplitude, frequency and phase uncertainties in time-series analyses. We also demonstrate the possibility to detect frequencies which are separated by less than the classical frequency resolution and that the realistic frequency error is at least 4 times smaller than the classical frequency resolution.
On Appell Sets and the Fueter-Sce Mapping
Creators: name: Gürlebeck, Norman
Publisher: name: arXiv
Year: 2008
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30G35, 33C65

description: It is proved, that the recently discussed Appell polynomials in Clifford algebras are the Fueter-Sce extension of the complex monomials z^k. Furthermore, it is shown, for which complex functions the Fueter-Sce extension and the extension method using Appell polynomials coincide.
description: 10 pages
State space models for building control: how deep should you go?
Creators: name: Schubnel, Baptiste
name: Carrillo, Rafael E.
name: Taddeo, Paolo
name: Casals, Lluc Canals
name: Salom, Jaume
name: Stauffer, Yves
name: Alet, Pierre-Jean
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Power consumption in buildings show non-linear behaviors that linear models cannot capture whereas recurrent neural networks (RNNs) can. This ability makes RNNs attractive alternatives for the model-predictive control (MPC) of buildings. However RNN models lack mathematical regularity which makes their use challenging in optimization problems. This work therefore systematically investigates whether using RNNs for building control provides net gains in an MPC framework. It compares the representation power and control performance of two architectures: a fully non-linear RNN architecture and a linear state-space model with non-linear regressor. The comparison covers five instances of each architecture over two months of simulated operation in identical conditions. The error on the one-hour forecast of temperature is 69% lower with the RNN model than with the linear one. In control the linear state-space model outperforms by 10% on the objective function, shows 2.8 times higher average temperature violations, and needs a third of the computation time the RNN model requires. This work therefore demonstrates that in their current form RNNs do improve accuracy but on balance well-designed linear state-space models with non-linear regressors are best in most cases of MPC.
Hyperspherical harmonic study of identical-flavor four-quark systems
Creators: name: Vijande, J.
name: Barnea, N.
name: Valcarce, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present an exact method based on a hyperspherical harmonic expansion to study systems made of quarks and antiquarks of the same flavor. Our formalism reproduces and improves the results obtained with variational approaches. This analysis shows that identical-flavor four-quark systems with non-exotic $2^{++}$ quantum numbers may be bound independently of the quark mass. $0^{+-}$ and $1^{+-}$ states become attractive only for larger quarks masses.
description: 4 pages, Talk given at the 18th International Conference on Few-Body Problems in Physics, August 21-26 2006, Santos, Sao Paulo, Brazil
Phase-space structure of protohalos: Vlasov versus Particle-Mesh
Creators: name: Colombi, Stéphane
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The phase-space structure of primordial dark matter halos is revisited using cosmological simulations with three sine waves and Cold Dark Matter (CDM) initial conditions. The simulations are performed with the tessellation based Vlasov solver ColDICE and a Particle-Mesh (PM) $N$-body code. The analyses include projected density, phase-space diagrams, radial density and pseudo-phase space density. Particular attention is paid to force and mass resolution. Because the phase-space sheet complexity, estimated in terms of total volume and simplices count, increases very quickly, ColDICE can follow only the early violent relaxation phase of halo formation. During the latter, agreement between ColDICE and PM simulations having one particle per cell or more is excellent and halos have a power-law density profile, $ρ(r) \propto r^{-α}$, $α\in [1.5,1.8]$. This slope, measured prior to any merger, is slightly larger than in the literature. The phase-space diagrams evidence complex but coherent patterns with clear signatures of self-similarity in the sine wave simulations, while the CDM halos are somewhat scribbly. After additional mass resolution tests, the PM simulations are used to follow the next stages of evolution. The power-law progressively breaks down with a convergence of the density profile to the well known "NFW"-like universal attractor, irrespectively of initial conditions, that is even in the three-sine wave simulations. This demonstrates again that mergers do not represent a necessary condition for convergence to the dynamical attractor. Not surprisingly, the measured pseudo phase-space density is a power-law $Q(r) \propto r^{-α_Q}$, with $α_{\rm Q}$ close to the prediction of secondary spherical infall model, $α_{\rm Q} \simeq 1.875$. However this property is also verified during the early relaxation phase, which is non trivial.
description: 37 pages, 20 figures, revised version with one typo corrected, accepted in Astronomy & Astrophysics
Classical Dynamics of the Time-Dependent Elliptical Billiard
Creators: name: Lenz, Florian
name: Diakonos, Fotis K.
name: Schmelcher, Peter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: In this work we study the nonlinear dynamics of the static and the driven ellipse. In the static case, we find numerically an asymptotical algebraic decay for the escape of an ensemble of non-interacting particles through a small hole due to the integrable structure of the phase space of the system. Furthermore, for a certain hole position a saturation value in the decay that can be tuned arbitrarily by varying the eccentricity of the ellipse is observed and explained. When applying harmonic boundary oscillations this saturation value caused by librator type orbits is gradually destroyed via two fundamental processes which are discussed in detail. As a result, an amplitude dependent emission rate is obtained in the long time behavior of the decay, suggesting that the driven elliptical billiard can be used as a controllable source of particles.
The Origin of Carbon-Enhancement and Initial Mass Function of Extremely Metal-Poor Stars in the Galactic Halo
Creators: name: Komiya, Yutaka
name: Suda, Takuma
name: Minaguchi, Hiroki
name: Shigeyama, Toshikazu
name: Aoki, Wako
name: Fujimoto, Masayuki Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It is known that the carbon-enhanced, extremely metal-poor (CEMP) stars constitute a substantial proportion in the extremely metal-poor (EMP) stars of the Galactic Halo, by far larger than CH stars in Population II stars. We investigate their origin with taking into account an additional evolutionary path to the surface carbon-enrichment, triggered by hydrogen engulfment by the helium flash convection, in EMP stars of $[Fe/H] \lesssim -2.5$. This process is distinct from the third dredge-up operating in more metal-rich stars and also in EMP stars. In binary systems of EMP stars, the secondary stars become CEMP stars through mass transfer from the primary stars of low and intermediate masses, which have developed the surface carbon-enhancement. Our binary scenario can predict the variations in the abundances not only for carbon but also for nitrogen and s-process elements and reasonably explain the observed properties such as the stellar distributions with respect to the carbon abundances, the binary periods, and the evolutionary stages. Furthermore, from the observed frequencies of CEMP stars with and without s-process element enhancement, we demonstrate that the initial mass function of EMP stars need to give the mean mass $~10\msun$ under the reasonable assumptions on the distributions of orbital separations and mass ratio of binary components. This also indicates that the currently observed EMP stars were exclusively born as the secondary members of binaries, making up $\sim 10%$ remnants of EMP binary systems of mass $~10^8\msun$ in total; in addition to CEMP stars with white dwarf companions, a significant fraction of them have experienced supernova explosions of their companions. We discuss the implications of the present results in relation to the formation of Galactic halo.
description: 66 pages, 12 figures, 2 tables Accepted for publication in ApJ
Quantum Mechanics with Extended Probabilities
Creators: name: Hartle, James B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The quantum mechanics of closed systems such as the universe is formulated using an extension of familiar probability theory that incorporates negative probabilities. Probabilities must be positive for sets of alternative histories that are the basis of fair settleable bets. However, in quantum mechanics there are sets of alternative histories that can be described but which cannot be the basis for fair settleable bets. Members of such sets can be assigned extended probabilities that are sometimes negative. A prescription for extended probabilities is introduced that assigns extended probabilities to all histories that can be described, fine grained or coarse grained, members of decoherent sets or not. All probability sum rules are satisfied exactly. Sets of histories that are recorded to sufficient precision are the basis of settleable bets. This formulation is compared with the decoherent (consistent) histories formulation of quantum theory. Prospects are discussed for using this formulation to provide testable alternatives to quantum theory or further generalizations of it.
description: 15 pages, 2 figures, revtex4, minor corrections, add'l references
Η Θεσσαλονίκη της κατοχής και του εμφυλίου μέσα απο τα μάτις της Λούλας Αναγνωστάκη και του Γιώργου Ιωάννου:
Creators: name: Ζηβανού, Αναστασία Μαργαρίτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Λούλα Αναγνωστάκη
Θέατρο
Θεσσαλονίκη
Η πόλη
Κινηματογράφος
Γειτονιές της πόλης
Mεταπολεμικό θέατρο
Bιωματική λογοτεχνία
Kατοχή και Εμφύλιος
Loula Anagnostaki
Theatre
Thessaloniki
The city
Cinema
Places in the city

description: Ο χώρος, το αστικό τοπίο αποτελεί καθοριστικό παράγοντα στη διαμόρφωση της προσωπικότητας του ανθρώπου, ειδικά όταν πρόκειται για τη γενέτειρά του. Η συγκεκριμένη εργασία προσπαθεί να προσεγγίσει την πόλη της Θεσσαλονίκης την περίοδο της Κατοχής και του Εμφυλίου, σχολιάζοντας τον τρόπο που την αντιμετώπισαν στο έργο τους δύο Θεσσαλονικείς πνευματικοί άνθρωποι που έζησαν την περίοδο εκείνη στην πόλη: ο Γιώργος Ιωάννου και η Λούλα Αναγνωστάκη. Τα έργα τα οποία εξετάζονται αναλυτικά είναι τα τρία πρώτα μονόπρακτα της Αναγνωστάκη (Η διανυκτέρευση, Η πόλη, Η παρέλαση) και κάποια διηγήματα του Ιωάννου από διαφορετικές συλλογές του: «Τα λαϊκά σινεμά», «Στα καμένα» (Για ένα φιλότιμο), «Οι τσιρίδες», «Η σειρήνα», «Λιμενικά Λουτρά» (Η σαρκοφάγος), «Ομίχλη», «Το μέντιουμ» (Η μόνη κληρονομιά), «Τα ίχνη της πυρκαγιάς», «Το δικό μας αίμα», «Θεσσαλονίκη:25 Μαρτίου 1944» (Το δικό μας αίμα).
description: The space, the city plays a crucial role in the way that our personality is formed as we are growing up. This role is even more important when it comes to our birth place. This project tries to approach the city of Thessaloniki, through the eyes of two writers who where borned and lived there during Second World War: Giorgos Ioannou and Loula Anagnostaki. The first three plays of Anagnostaki (Overnight stop, The city, The parade) and some short stories of Ioannou from different books are being examined and analysed: “In working class cinemas”, “In the burned places” (For a little self-respect), “The screams”, “The siren”, “Baths in the port” (The sarcophagus), “Fog”, “The medium”, (The only inheritance), “The traces of fire”, “Our blood”, “Thessaloniki: 25 March 1944” (Our blood).
Η συνθήκη για τη μερική απαγόρευση των πυρηνικών δοκιμών:
Creators: name: Εμμανουηλίδης, Εμμανουήλ Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Πυρηνικά όπλα
Αφοπλισμός
Έλεγχος των εξοπλισμών
Διπλωματική ιστορία
Πυρηνικές δοκιμές
Ψυχρός Πόλεμος
Nuclear weapons
Disarmament
Arms control
Diplomatic history
Nuclear tests
Cold war

description: H Συνθήκη Μερικής Απαγόρευσης των Πυρηνικών δοκιμών, είναι η πρώτη διεθνής σύμβαση στην προσπάθεια για πυρηνικό αφοπλισμό ή για έλεγχο των πυρηνικών όπλων. Υπογράφηκε στη Μόσχα στις 5 Αυγούστου 1963 από τις κυβερνήσεις των Ηνωμένων Πολιτειών, της Μεγάλης Βρετανίας, και της Σοβιετικής Ένωσης. Την υπογραφή εκ μέρους των κρατών ανέλαβαν οι Andrei Gromyko για την ΕΣΣΔ, ο Sir Alec Douglas-Home για το Ηνωμένο Βασίλειο και ο Dean Rusk για τις ΗΠΑ. Η Συνθήκη απαγορεύει τις πυρηνικές δοκιμές στον αέρα, το νερό και τη στρατόσφαιρα, όχι όμως και υπόγεια. Η Συνθήκη Μερικής Απαγόρευσης υπογράφηκε μέσα σε ένα κλίμα μείωσης της έντασης, μετά από την κορύφωση του Ψυχρού Πολέμου με την κρίση της Κούβας και του Βερολίνου. Οι διαπραγματεύσεις για την υπογραφή της διήλθαν από το δύσκολο έδαφος του ανταγωνισμού στους εξοπλισμούς μεταξύ των ΗΠΑ και της ΕΣΣΔ. Είναι τέλος χαρακτηριστικό ότι ο ανταγωνισμός αυτός κατακρινόταν και από την κοινή γνώμη, η οποία συνειδητοποιούσε τον καταστρεπτικό χαρακτήρα των πυρηνικών όπλων.
description: Limited Test Ban Treaty, is the first international convention in the effort on nuclear disarmament and control of nuclear arms. It was signed in Moscow on 5 August 1963 from the governments of United States, Great Britain, and Soviet Union. The signature on behalf of the states undertook Andrei Gromyko for the USSR, Sir Alec Douglas-Home for the United Kingdom and Dean Rusk for the USA. The treaty prohibits the nuclear tests in air, water and outer space, not underground. The treaty was signed in a environment of reduction of intensity, after the climaxing of Cold War (see Cuba and Berlin Crisis). The negotiations on the signature went through the difficult territory of the equipment competitions between USA and USSR. Finally, it is characteristic that this competition was also blamed by the public opinion, which realised the calamitous character of nuclear arms.
Symmetry patterns in the $(N,Δ)$ spectrum
Creators: name: Gonzalez, P.
name: Vijande, J.
name: Valcarce, A.
name: Garcilazo, H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We revise the role played by symmetry in the study of the low-lying baryon spectrum and comment on the difficulties when trying to generalize the symmetry pattern to higher energy states. We show that for the $(N,Δ)$ part such a generalization is plausible allowing the identification of spectral regularities and the prediction of until now non-identified resonances.
description: 4 pages, Talk given at the 18th International Conference on Few-Body Problems in Physics, August 21-26 2006, Santos, Sao Paulo, Brazil
Ενα ταξίδι στο χώρο και στο χρόνο με αφορμή την Πόλη της Λούλας Αναγνωστάκη:
Creators: name: Ζηβανού, Αναστασία Μαργαρίτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Λούλα Αναγνωστάκη
Γιώργος Ιωάννου
Θεσσαλονίκη
Μεταπολεμικό θέατρο
Βιωματική λογοτεχνία
Κατοχή κι Εμφύλιος
Loula Anagnostaki
Giorgos Ioannou
Thessaloniki
Theatre after second world war
Biomatic literature
Second World War

description: Η πόλη της Λούλας Αναγνωστάκη είναι ένα από τα πολλά έργα τα οποία έχουν ασχοληθεί με το αστικό τοπίο. Η συγκεκριμένη εργασία στοχεύει στη διατύπωση κάποιων προτάσεων για τη δημιουργία μιας κινηματογραφικής ταινίας που θα βασίζεται στην Πόλη της Λούλας Αναγνωστάκη και θα έχει ως φόντο τη Θεσσαλονίκη. Η φωτογραφική μηχανή αντικαθιστά την κινηματογραφική κάμερα και συνθέτει την προσωπική ιδιαίτερη Θεσσαλονίκη των ηρώων της Αναγνωστάκη. Έτσι η εργασία αποτελείται από φωτογραφίες που έχουν τραβηχτεί σε χαρακτηριστικές γειτονιές της πόλης και θα αποτελούν τα πλάνα της ταινίας. Σ’ αυτό το υλικό έρχονταί να προστεθούν και άλλες παλιές φωτογραφίες της Θεσσαλονίκης από τον προηγούμενο αιώνα καθώς και διάφορα κείμενα με ιστορικές πληροφορίες για την κάθε περιοχή.
description: The city by Loula Anagnostaki is one of many pieces of work that have as main theme the urban space. This project express some thoughts about the creation of a film that will be based at the play by Loula Anagnostaki and will take place at the city of Thessaloniki. The camera of the photographer replaces the film camera and creates the personal and unique Thessaloniki of Anagnostaki’s characters. The photographs are been taken in different places of the city and constitute the scenes of the film. In additional, a lot of old photographs of the city (mainly from the 19th century) are exposed and combined with many historical informations for each place.
Modulated vortex states in Rashba non-centrosymmetric superconductors
Creators: name: Matsunaga, Yuichi
name: Hiasa, Norihito
name: Ikeda, Ryusuke
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Vortex lattice structures to occur in Rashba non-centrosymmetric superconductors under a magnetic field parallel to the basal plane are studied by assuming a singlet Cooper pairing and taking account of both the paramagnetic and orbital depairings. A vortex lattice of Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) type with modulation perpendicular to the field is expected to occur in the limit of vanishing ${\tilde η}$, where ${\tilde η}$ is the spin-orbit coupling {\it normalized} by Fermi energy. As ${\tilde η}$ increases, however, this state tends to be replaced by another new vortex lattice with a modulation of the gap amplitude parallel to the helical phase modulation induced by the absence of inversion symmetry. Differences of the present results from those in the Pauli limit and a correlation of a structural transition with the $H_{c2}(T)$-curve are discussed in relation to possible experimental realization.
description: Final version accepted for publication in Phys.Rev.B (Rapid Commmun.)
Εμψύχωση ομάδας ατόμων με ειδικές ανάγκες:
Creators: name: Χριστοδουλάκη, Ιωάννα Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Εμψύχωση
Ατομα με ειδικές ανάγκες
Ομάδες
Σύνδρομο Down
Σύνδρομο Williams
Νοητική καθυστέρηση
Encourange
Groups
Persons/students with special needs
Syndrome of Down
Syndrome of Williams
Mental retardation

description: Στην παρούσα εργασία αναφέρεται η πορεία εξέλιξης μιας ομάδας εμψύχωης ατόμων με ειδικές ανάγκες. Στην ομάδα συμμετέχουν 5 άτομα, 2 με σύνδρομο ντάουν, δυο με νοητική υστέρηση κι ένα με σύνδρομο ουίλλιμαμς. Πρόκειται για έρευνα μελέτης περίπτωσης όπου ο ερευνητής κατέγραψε τις συμπεριφορές των ατόμων. Μέσα από τα αποτελέσματα της έρευνας φάνηκε η σημαντική βελτίωση των παιδιών
description: In this research we can see the way of improvement of a group of people with special needs. This group is joined by 5 persons, 2 with Down syndrome and one with Williams-Beuren syndrome, 2 with mental retardation. this is a case study research where the researcher wrote down the behaviours of the group and how the encourager help them to improve. From the results we can see the great improvement in those persons
Μικρή Βόλβη: ένας οικισμός της αρχαιότερης νεολιθικής μέσα από το πρίσμα της λιθοτεχνίας του
Creators: name: Δόγιαμα, Τριανταφυλλιά-Ειρήνη
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Αρχαιότερη νεολιθική
Λιθοτεχνία
Κεντρική Μακεδονία
Πυριτόλιθος
Λάξευση
Early neolithic
Chipped stone
Central Macedonia
Flint
Knapping

description: Η εργασία πραγματεύεται μια μελέτη της αδημοσίευτης λιθοτεχνίας από τον οικισμό της Μικρής Βόλβης, στην ανατομική πλευρά της λεκάνης του Λαγκαδά, ο οποίος ανάγεται στην αρχαιότερη νεολιθική, Μέσα από το πρίσμα της λιθοτεχνίας εξάγονται συμπεράσματα για τις στρατηγικές προμήθειας των πρώτων υλών, την λάξευση, τη χρήση και την απόρριψη των εργαλείων, καθώς επίσης και για τον γενικότερο χαρακτήρα, του ίδιου του οικισμού ως κοινωνικό και οικονομικό πλαίσιο
description: This thesis is based on the study of the unpublished chipped stone from the early neolithic settlement of Mikri Volvi which is situated in the easter part of the Langadas basin. The study of the sites lithics provides us with valuable infromation regarding the providment strategies, knapping techniques, use and discard of stone tools, as well as the social and economic context of the settlement itself
Bericht über die Sitzung des Zentralausschusses des Ökumenischen Rates der Kirchen
Creators: name: Heller, Dagmar
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 51 Nr. 4 (2002): Ökumenische Rundschau, Band 51, Heft 4
Protocols for creating and distilling multipartite GHZ states with Bell pairs
Creators: name: de Bone, Sébastian
name: Ouyang, Runsheng
name: Goodenough, Kenneth
name: Elkouss, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The distribution of high-quality Greenberger-Horne-Zeilinger (GHZ) states is at the heart of many quantum communication tasks, ranging from extending the baseline of telescopes to secret sharing. They also play an important role in error-correction architectures for distributed quantum computation, where Bell pairs can be leveraged to create an entangled network of quantum computers. We investigate the creation and distillation of GHZ states out of non-perfect Bell pairs over quantum networks. In particular, we introduce a heuristic dynamic programming algorithm to optimize over a large class of protocols that create and purify GHZ states. All protocols considered use a common framework based on measurements of non-local stabilizer operators of the target state (i.e., the GHZ state), where each non-local measurement consumes another (non-perfect) entangled state as a resource. The new protocols outperform previous proposals for scenarios without decoherence and local gate noise. Furthermore, the algorithms can be applied for finding protocols for any number of parties and any number of entangled pairs involved.
อิทธิพลของปัจจัยในการทำงาน วัฒนธรรมองค์การ พฤติกรรมในการทำงานที่ส่งผลต่อผลการปฏิบัติงานของพนักงานระดับปฏิบัติการโรงงานอุตสาหกรรมผลิตอาหารและเครื่องดื่มในนิคมอุสาหกรรมแหลมฉบัง จังหวัดชลบุรี
Creators: name: รัชรินทร์ กุลชาติ
Publisher: name: คณะบริหารธุรกิจ มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ
Year: 2566
Subjects: Work Factor
Organizational Culture
Working Behavior
Job Performance

description: วารสารบริหารธุรกิจอุตสาหกรรม, 5, 2, 32-50
Search for the existence of circulating currents in high-$T_c$ superconductors using the polarized neutron scattering technique
Creators: name: Sidis, Yvan
name: Fauqué, Benoit
name: Aji, Vivek
name: Bourges, Philippe
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We review experimental attempts using polarized neutron scattering technique to reveal the existence in high temperature superconductors of a long-range ordered state characterized by the spontaneous appearance of current loops. We draw a particular attention to our recent results (B. Fauqué {\it et al.}, {\it Phys. Rev. Lett.} {\bf 96}, 197001 (2006)) that, up to now, can be explained only by the theory of circulating current proposed by C.M. Varma.
description: presented at a conference: http://www.hmi.de/bensc/pncmi2006, to be published in Physica B
Equal educational opportunity and considerations of student interests: the basis on which public schools proceed
Creators: name: Karmel, Joe
Publisher: name: University of British Columbia
Year: 2009

description: A difficulty in achieving equal educational opportunity in the public school system is that there has been a tendency among educational planners to confuse the notion of equality with that of sameness, to the extent that schools tend to offer identical educational opportunities rather than equal educational opportunities. The promotion of an approach which aims to standardize teaching practices and student programmes, stems from an interpretation of equality which considers that conditions of equal educational opportunity are attained when the same conditions exist for everyone. Lacking in this approach, however, is any consideration of individual student interests, a consideration wherein the intentional striving of students to achieve equal access to the resources that promote academic achievement has essentially been overlooked in the judging of equal educational opportunity.
Influence of geometric structure, convection, and eddy on sound propagation in acoustic metamaterial with turbulent flow
Creators: name: Pak, Myong Chol
name: Kim, Kwang-Il
name: Pak, Hak Chol
name: Hong, Kwon Ryong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The problem of reducing noise in the transportation is an important research field to prevent accidents and to provide a civilized environment for people. A material that has recently attracted attention in research to reduce noise is acoustic metamaterial, and most of the research projects so far have been limited to the case of static media without flow. We have studied the sound transmission properties of acoustic metamaterial with turbulent flow to develop acoustic metamaterial that be used in transportation. In this paper, the effect of geometrical structure, the convective effect, and the eddy effect on sound propagation in acoustic metamaterial with turbulent flow are investigated, and the relationships between them are analyzed. The convective effect and the eddy effect both reduce the resonant strength of sound transmission loss resulting from the unique geometry of the acoustic crystal, but shift the resonant frequencies in opposite directions. In addition, when the convective effect and the eddy effect of the airflow, as well as the intrinsic interaction effect generated from the unique geometrical structure of the acoustic metamaterial cannot be ignored, they exhibit competition phenomena with each other, resulting in a widening of the resonance peak. As a result, these three effects cause the shift of the resonance frequency of the sound transmission loss and the widening of the resonance peak. The results of this study show that even in the case of turbulent flow, acoustic metamaterial can be used for transportation by properly controlling the geometric size and shape of the acoustic metamaterial.
description: 19 pages, 17 figures
Minutes of meeting of the Trustees of the Winfield and Okanagan Centre Irrigation District, November 6, 1944
Creators: name: Trustees Of The Winfield And Okanagan Centre Irrigation District
Publisher: name: The University of British Columbia
Year: 2017

description: Minutes of meeting of the Trustees of the Winfield and Okanagan Centre Irrigation District, dated November 6, 1944, regarding increasing water rates, the progress of the construction of the new dam, the assessment rate of the 1944 year, and domestic water.