cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modeling Porous Dust Grains with Ballistic Aggregates I: Geometry and Optical Properties
Creators: name: Shen, Yue
name: Draine, B. T.
name: Johnson, Eric T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the scattering and absorption of light by random ballistic aggregates of spherical monomers. We present a general measure for the porosity of an irregular particle. Three different classes of ballistic aggregates are considered, with different degrees of porosity. Scattering and absorption cross sections are calculated, using the discrete dipole approximation (DDA), for grains of three compositions (50% silicate and 50% graphite; 50% silicate and 50% amorphous carbon; and 100% silicate), for wavelengths from 0.1 micron to 4 micron. For fixed particle mass, increased porosity increases the extinction at short wavelengths, but decreases the extinction at wavelengths long compared to the overall aggregate size. Scattering and absorption cross sections are insensitive to monomer size as long as the constituent monomers are small compared with the incident wavelength. We compare our accurate DDA results with two other approximations: the analytical multi-layer sphere (MLS) model and effective medium theory (EMT). For high porosity and/or absorptive materials, the MLS model does not provide a good approximation for scattering and absorption by ballistic aggregates. The EMT method provides a much better approximation than the MLS model for these aggregates, with a typical difference less than 20% in extinction and scattering cross sections compared with DDA results, for all types, compositions and wavelengths probed in this study.
description: Updated calculations and references; conclusions unchanged; ApJ in press
Distribution of Energy-Momentum Tensor around a Static Quark in the Deconfined Phase of SU(3) Yang-Mills Theory
Creators: name: Yanagihara, Ryosuke
name: Kitazawa, Masakiyo
name: Asakawa, Masayuki
name: Hatsuda, Tetsuo
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Energy momentum tensor (EMT) characterizes the response of the vacuum as well as the thermal medium under the color electromagnetic fields. We define the EMT by means of the gradient flow formalism and study its spatial distribution around a static quark in the deconfined phase of SU(3) Yang-Mills theory on the lattice. Although no significant difference can be seen between the EMT distributions in the radial and transverse directions except for the sign, the temporal component is substantially different from the spatial ones near the critical temperature $T_c$. This is in contrast to the prediction of the leading-order thermal perturbation theory. The lattice data of the EMT distribution also indicate the thermal screening at long distance and the perturbative behavior at short distance.
description: 12 pages, 12 figures
Light scattering from stationary $\mathcal{PT}$-symmetric collections of particles
Creators: name: Korotkova, Olga
name: Brandão, Paulo A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A potential scattering theory from deterministic and random $\mathcal{PT}$ collections of particles with gain and loss is introduced and the forms of their structure and pair-structure factors are elucidated. An example relating to light scattering from a random distribution of a pair of particles with gain and loss is considered.
description: 8 pages, 2 figures
Two sufficient conditions for Poisson approximations in the ferromagnetic Ising model
Creators: name: Coupier, David
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60F05 (Primary) 82B20 (Secondary)

description: A $d$-dimensional ferromagnetic Ising model on a lattice torus is considered. As the size of the lattice tends to infinity, two conditions ensuring a Poisson approximation for the distribution of the number of occurrences in the lattice of any given local configuration are suggested. The proof builds on the Stein--Chen method. The rate of the Poisson approximation and the speed of convergence to it are defined and make sense for the model. Thus, the two sufficient conditions are traduced in terms of the magnetic field and the pair potential. In particular, the Poisson approximation holds even if both potentials diverge.
description: Published in at http://dx.doi.org/10.1214/1214/07-AAP487 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Backlund transformations for integrable lattice equations
Creators: name: Atkinson, James
Publisher: name: arXiv
Year: 2008
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We give new Backlund transformations (BTs) for some known integrable (in the sense of being multidimensionally consistent) quadrilateral lattice equations. As opposed to the natural auto-BT inherent in every such equation, these BTs are of two other kinds. Specifically, it is found that some equations admit additional auto-BTs (with Backlund parameter), whilst some pairs of apparently distinct equations admit a BT which connects them.
description: 9 pages
Η αισθητική της μουσικής του Ρ. Βάγκνερ
Creators: name: Clausnitzer, Angela Ingolf
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Βάγκνερ
Συνολικό έργο
Ιουδαϊσμός
Μουσική
Wagner
Gesamtkunstwek
Judentum
Musik

description: Πρόκειται για μια προσέγγιση του συνολικού έργου τέχνης (Gesamtkunstwerk) του Richard Wagner, τη σχέση του με τον ιουδαϊσμό, τις επιρροές του από μεγάλους φιλοσόφους (Nietzsche, Schopenhauer) και μια αποτίμηση του τι είναι "γερμανικό" στη μουσική του μεγάλου συνθέτη
description: A general approach to R. Wagner's total esthetical music work (Gesamtkunstwerk), his relationship to israelism, his influences by great philosophers (Nietzche, Schopenhauer) and a summary of what could be "german" in the music of the great composer
Thermodynamical properties of the Universe with dark energy
Creators: name: Gong, Yungui
name: Wang, Bin
name: Wang, Anzhong
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We have investigated the thermodynamical properties of the Universe with dark energy. Adopting the usual assumption in deriving the constant co-moving entropy density that the physical volume and the temperature are independent, we observed some strange thermodynamical behaviors. However, these strange behaviors disappeared if we consider the realistic situation that the physical volume and the temperature of the Universe are related. Based on the well known correspondence between the Friedmann equation and the first law of thermodynamics of the apparent horizon, we argued that the apparent horizon is the physical horizon in dealing with thermodynamics problems. We have concentrated on the volume of the Universe within the apparent horizon and considered that the Universe is in thermal equilibrium with the Hawking temperature on the apparent horizon. For dark energy with $w\ge -1$, the holographic principle and the generalized second law are always respected.
description: two figures; v2: minor corrections and updates, JCAP in press
Crystal-field splittings in CeX (X= N, P, As, Sb, Bi) compounds
Creators: name: Roura-Bas, P.
name: Vildosola, V.
name: Llois, A. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The unusual and interesting physical properties of rare earth intemetallic compounds have their origin in the combination of strongly correlated 4f states and their hybridization with the conduction electron sea, which gives rise to their complex low temperature Kondo behavior. In particular, Ce compounds are very sensitive to the crystalline and chemical environment, as compared to other rare earth systems. The interaction of the 4f state with the conduction band plays an important role in the determination of the different magnetic, structural and transport properties of these systems. Among the cerium compounds, those of the type CeX, which crystallize in the rock salt structure, exhibit extremely unusual magnetic properties. By making use of the mixed LDA-NCA calculation technique we analyse the crystal-field splittings of CeX compounds (X=N, P, As, Sb, Bi). The obtained ab-initio hybridization functions are taken as imputs to calculate the crystal-field splittings within NCA (non crossing approximation) and the tendencies are contrasted with experiments. KEY WORDS: Highly correlated systems, crystal fields, p-electron.
description: 8 pages, 2 figures
Elastic parton scattering and non-statistical event-by-event mean-pt fluctuations in Au + Au collisions at RHIC
Creators: name: Liu, Qing-Jun
name: Zhao, Wei-Qin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Non-statistical event-by-event mean-pt fluctuations in Au + Au collisions at sqrt(s_NN) = 130 and 200 GeV are analyzed in AMPT with string-melting, and the results are compared with STAR data. The analysis suggests that in-medium elastic parton scattering may contribute greatly to the mean-p_t fluctuations in relativistic heavy-ion collisions. Furthermore, it is demonstrated that non-statistical event-by-event mean-pt fluctuations can be used to probe the initial partonic dynamics in these collisions. The comparison shows that with an in-medium elastic parton scattering cross section sigma_p=10 mb, AMPT with string-melting can well reproduce sqrt(s_NN) = 130 GeV data on the centrality dependence of non-statistical event-by-event mean-pt fluctuations. The comparison also shows that the fluctuation data for sqrt(s_NN) = 200 GeV Au + Au collisions can be well reproduced with sigma_p between 6 and 10 mb.
description: 6 pages, 3 figures
Kondo Breakdown as a Selective Mott Transition in the Anderson Lattice
Creators: name: Pepin, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show within the slave boson technique, that the Anderson lattice model exhibits a Kondo breakdown quantum critical point (KB-QCP) where the hybridization goes to zero at zero temper- ature. At this fixed point, the f-electrons experience as well a selective Mott transition separating a local-moment phase from a Kondo-screened phase. The presence of a multi-scale QCP in the An- derson lattice in the absence of magnetism is discussed in the context of heavy fermion compounds. This study is the first evidence for a selective Mott transition in the Anderson lattice.
description: 4 pages, 2 figures, version with new figures and typos corrected
Complementary Pseudo Labels For Unsupervised Domain Adaptation On Person Re-identification
Creators: name: Feng, Hao
name: Chen, Minghao
name: Hu, Jinming
name: Shen, Dong
name: Liu, Haifeng
name: Cai, Deng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In recent years, supervised person re-identification (re-ID) models have received increasing studies. However, these models trained on the source domain always suffer dramatic performance drop when tested on an unseen domain. Existing methods are primary to use pseudo labels to alleviate this problem. One of the most successful approaches predicts neighbors of each unlabeled image and then uses them to train the model. Although the predicted neighbors are credible, they always miss some hard positive samples, which may hinder the model from discovering important discriminative information of the unlabeled domain. In this paper, to complement these low recall neighbor pseudo labels, we propose a joint learning framework to learn better feature embeddings via high precision neighbor pseudo labels and high recall group pseudo labels. The group pseudo labels are generated by transitively merging neighbors of different samples into a group to achieve higher recall. However, the merging operation may cause subgroups in the group due to imperfect neighbor predictions. To utilize these group pseudo labels properly, we propose using a similarity-aggregating loss to mitigate the influence of these subgroups by pulling the input sample towards the most similar embeddings. Extensive experiments on three large-scale datasets demonstrate that our method can achieve state-of-the-art performance under the unsupervised domain adaptation re-ID setting.
description: 10 pages, 3 figures. Accepted for publication in IEEE Transactions on Image Processing 2021
Efimov states embedded in the three-body continuum
Creators: name: Mehta, N. P.
name: Rittenhouse, Seth T.
name: D'Incao, J. P.
name: Greene, Chris H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We consider a multichannel generalization of the Fermi pseudopotential to model low-energy atom-atom interactions near a magnetically tunable Feshbach resonance, and calculate the adiabatic hyperspherical potential curves for a system of three such interacting atoms. In particular, our model suggests the existence of a series of quasi-bound Efimov states attached to excited three-body thresholds, far above open channel collision energies. We discuss the conditions under which such states may be supported, and identify which interaction parameters limit the lifetime of these states. We speculate that it may be possible to observe these states using spectroscopic methods, perhaps allowing for the measurement of multiple Efimov resonances for the first time.
description: 4 pages 3 figures
Modeling huge photoinduced spin polarons in intrinsic magnetic semiconductors
Creators: name: van Kooten, S. C. P.
name: Gratens, X.
name: Henriques, A. B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In intrinsic magnetic semiconductors, the absorption of a single photon can generate a spin polaron, whose magnetic moment reaches many thousands of Bohr magnetons [1.2]. Here we investigate photoinduced spin polarons, using Monte Carlo simulations. In antiferromagnetic semiconductors, photoinduced spin polarons are most efficiently generated in the whole temperature interval up to the phase transition, whereas in ferromagnetic semiconductors much larger spin polarons can be photoinduced, but only around the phase transition temperature. Because Monte Carlo simulations are computationally expensive, we developed an analytical model, based on the Weiss field theory. Although the Weiss model does not provide as much information as a Monte Carlo simulation, such as spin texture and fluctuations, it yields formulas that can be used to estimate instantly the expected photoinduced spin polaron size in many intrinsic magnetic semiconductors.
description: Accepted for publication in Phys. Rev. B
The early-type galaxies NGC 1407 and NGC 1400 - I: spatially resolved radial kinematics and surface photometry
Creators: name: Spolaor, Max
name: Forbes, Duncan A.
name: Hau, George K. T.
name: Proctor, Robert N.
name: Brough, Sarah
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This is the first paper of a series focused on investigating the star formation and evolutionary history of the two early-type galaxies NGC 1407 and NGC 1400. They are the two brightest galaxies of the NGC 1407 (or Eridanus-A) group, one of the 60 groups studied as part of the Group Evolution Multi-wavelength Study (GEMS). Here we present new high signal-to-noise long-slit spectroscopic data obtained at the ESO 3.6m telescope and high-resolution multi-band imaging data from the HST/ACS and wide-field imaging from Subaru Suprime-Cam. We spatially resolved integrated spectra out to 0.6 (NGC 1407) and 1.3 (NGC 1400) effective radii. The radial profiles of the kinematic parameters v(rot), sigma, h3 and h4 are measured. The surface brightness profiles are fitted to different galaxy light models and the colour distributions analysed. The multi-band images are modelled to derive isophotal shape parameters and residual galaxy images. The parameters from the surface brightness profile fitting are used to estimate the mass of the possible central supermassive black hole in NGC 1407. The galaxies are found to be rotationally supported and to have a flat core in the surface brightness profiles. Elliptical isophotes are observed at all radii and no fine structures are detected in the residual galaxy images. From our results we can also discard a possible interaction between NGC 1400, NGC 1407 and the group intergalactic medium. We estimate a mass of 1.03x10^9 M(sun) for the supermassive black hole in NGC 1407 galaxy.
description: 11 pages, 6 tables, 6 figures, Accepted for publication in MNRAS
Μοντελοποίηση της βαθμωτής έκλουσης υπό συνθήκες μεταβολής της ταχύτητας ροής στην υγρή χρωματογραφία αντίστροφης φάσης
Creators: name: Ζήτρου, Αστερία Ιωάννη-Αστέριου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Υγρή χρωματογραφία αντίστροφης φάσης
Βαθμωτή έκλουση με μεταβολή ταχύτητας ροής
Ελεύθερα αμινοξέα
1,4-διϋδροπυριδίνες
Reversed-phase liquid chromatography
Flow rate gradient
1,4 dihydrophyridines
Underivatized amino acids

description: Μελετήθηκε η βασική εξίσωση της έκλουσης ενώσεων με προγραμματισμό της ταχύτητας ροής σε διάφορους τύπους βαθμωτής έκλουσης με μεταβολή της ταχύτητας ροής (βηματικοί, γραμμικοί, πολυγραμμικοί, παραβολικοί και πιο πολύπλοκοι) που εφαρμόστηκαν σε πέντε 1,4-διυδροπυριδίνες και εννέα αμινοξέα. Η πρόβλεψη τη συγκράτησης ήταν εξαιρετική για όλες τις ενώσεις υπό όλες τις συνθήκες μεταβολής της ταχύτητας ροής. Επιπλέον, παρόλο που ο προγραμματισμός της ταχύτητας ροής φαίνεται να περιορίζεται από την ικανότητά του να παρέχει βελτιωμένη απόδοση στην υγρή χρωματογραφία, υπάρχουν συγκεκριμένα προφίλ ταχύτητας ροής που παρέχουν σημαντική βελτίωση στην αναδιάταξη των κορυφών σε ένα χρωματογράφημα.
description: The fundamental equation of flow rate programming elution was tested in several different types of flow-rate gradients (Step, linear, multilinear, parabolic and more combined gradients) implemented in the separation of fire 1.4 dihydropyridines and nine underivatized aminoacids. The retention prediction obtained for all solutes under all flow-programmed conditions was excellent. In addition, although flow programming appears quite limited in its ability to provide improved performance in liquid chromatography., there are specific flow rate profiles which provide significant improvement in the rearrangement of the peaks
Μοναστηριακοί περίπατοι στον Υμηττό
Creators: name: Μητροπούλου, Μαρία-Ειρήνη Φωτίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2024
Subjects: Βουνό του Υμηττού/Υμηττός
Βυζαντινά μοναστήρια
Θρησκευτικός Τουρισμός
Mount Hymettus
Byzantine monasteries
Religious tourism

description: Σκοπός της παρούσας διατριβής είναι η έρευνα και η μελέτη των μοναστηριών του Υμηττού και γενικότερα του βουνού ως τόπου λατρείας στο πέρασμα των χρόνων. Αρχικά, γίνεται αναφορά στη γεωγραφική θέση, στη φυσική καλλονή και στο ρόλο του Υμηττού στη ζωή τόσο των ασκητών όσο και των κατοίκων της ευρύτερης περιοχής. Θα δούμε, πως από τα αρχαία χρόνια στις πλαγιές του Υμηττού, δέσποζαν ναοί, αφιερωμένοι στη λατρεία του Δωδεκάθεου, αλλά και ποικίλες φιλοσοφικές σχολές. Με το πέρασμα των αιώνων και την αντικατάσταση του δωδεκαθεϊσμού από το Χριστιανισμό, παρατηρούμε ότι στις ίδιες τοποθεσίες ανεγέρθηκαν μοναστήρια που αποτέλεσαν πόλο έλξης για προσκυνητές και περιηγητές τόσο ντόπιων όσο και ξένων. Άγιος Ιωάννης Κυνηγός ή Μονή Φιλοσόφων, Ιερά Μονή Ταξιαρχών Αστερίου, Ιερά Μονή Εισοδίων της Θεοτόκου Καισαριανής, Ιερά Μονή Αγίου Ιωάννη Προδρόμου Καρέα, Ιερά Μονή Αγίου Ιωάννη του Θεολόγου και Ιερά Μονή Αγίου Γεωργίου Κουταλά είναι τα μοναστήρια του Υμηττού, που μελετάμε. Επικεντρωνόμαστε στην καταγραφή και στην αναφορά στοιχείων σχετικά με την τοποθεσία, την ονομασία, την ιστορία και την αρχιτεκτονική των παραπάνω μοναστηριών. Σε αυτήν μας την προσπάθεια έχουμε αρωγό τις έρευνες, τις μελέτες και τις μαρτυρίες σημαντικών προσωπικοτήτων του χώρου, όπως του Δημήτριου Καμπούρογλου, του Αναστάσιου Ορλάνδου και του Αγίου Μιχαήλ Χωνιάτη ή Ακομινάτου.
description: The aim of the present thesis is to study Mount Hymettus, as a place of worship throughout the ages and specifically, the monasteries of the aforementioned mountain. Initially, we will refer to the geographical position, the natural beauty and the role of Hymettus in the lives of the monks and the inhabitants of the surrounding area. During ancient times, in the foothills of the mountain, there were temples, honoring the twelve Olympian gods, in addition to various philosophical schools. Later, in the same locations, monasteries were founded, which attracted not only the local pilgrims and tourists but also those from around the world. This thesis will discuss the following monasteries: Holy Monastery of Saint John Kynegos, Asteriou Monastery of the Taxiarchs, Monastery of Issodion Theotokou Kaisarianis (Monastery of Kaisariani), Holy Monastery of Saint John the Forerunner at Kareas, Holy Monastery of Saint John the Theologian and St. George Koutalas Holy Convent. With the aid of the research and studies done by experts like Dimitrios Kambouroglou, Anastasios Orlandos and Michael Choniates, we will focus on elements regarding the location, the name, the history and architecture of the above monasteries.
description: Σε συνεργασία με: Τμήμα Διοίκησης οργανισμών, Μάρκετινγκ και Τουρισμού της Σχολής Οικονομίας και Διοίκησης (Θεσσαλονίκης) του Διεθνούς Πανεπιστημίου Ελλάδας
Canción titulada Mamasrech, o canción del masato
Creators: name: López, Dominga
name: Santos Granero, Fernando
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: ame

description: Es una canción en el estilo de las canciones sagradas sherareñets, que son canciones vocales femeninas. Transcritas, traducidas y mecanografiadas las palabras introductorias antes de comenzar a cantar.
TIJORAT BANKLARIDA MUAMMOLI KREDITLAR VA ULARNI QISQARTIRISH YO'LLARI
Creators: name: Maxmudov, Rahimjon
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada muammoli kreditlar, shuningdek, xarakatsiz kreditlar (NPL) qarz oluvchi to‘lov majburiyatlarini bajarmagan kreditlarni boshqarish bilan bog‘liq muammolar va ularni bartaraf etish yo‘llari o‘rganilgan. Xususan, banklarda muammoli kreditlar moliyaviy barqarorlik va rentabellik uchun katta xavf tug‘diradi. NPLning yuqori darajasi bankning kapital bazasini yemirishi, likvidligini pasaytirishi va kreditlash imkoniyatlarini yomonlashtirishi mumkin. Muammoli kreditlarning vujudga kelishida ko‘pincha kreditni noto‘g‘ri baholash, iqtisodiy tanazzul, sohaga oid inqirozlar va qarz oluvchilarni noto‘g‘ri boshqarish kabi sabablar asos bo‘ladi.
Βιοκαλλιέργεια κηπευτικών στη Θεσσαλία: καλλιεργητικές πρακτικές και στάσεις παραγωγών
Creators: name: Κοντοθανάση, Αγλαΐα Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Βιοκαλλιέργεια κηπευτικών
Θεσσαλία
Καλλιεργητικές πρακτικές
Στάσεις βιοκαλλιεργητών
SPSS
Πολυμεταβλητές αναλύσεις
Vegetables organic farming
Thessaly (Greece)
Agricultural management
Farmer's attitudes
SPSS software
Multivariant analysis

description: Στην παρούσα εργασία επιχειρήθηκε μέσω προσωπικών συνεντεύξεων, συμπλήρωση ερωτηματολογίων και στατιστική επεξεργασία των δεδομένων με τη βοήθεια του προγράμματος SPSS η μελέτη του πληθυσμού των βιοκαλλιεργητών κηπευτικών της Θεσσαλίας τόσο ως προς τα χαρακτηριστικά τους όσο και ως προς τις καλλιεργητικές πρακτικές που εφαρμόζουν, τις στάσεις, τις προτιμήσεις τους καθώς και η διερεύνηση των σχέσεων ή των εξαρτήσεων που προκύπτουν μεταξύ των μεταβλητών που εξετάστηκαν.Διαπιστώθηκε ότι τα βιολογικά κηπευτικά στη Θεσσαλία καλλιεργούνται από μικρό αριθμό ατόμων, νέους σε ηλικία, με μέτριο ως υψηλό μορφωτικό επίπεδο και κατά κύριο επάγγελμα αγρότες. Η διάθεση της παραγωγής στην αγορά φαί-νεται να είναι εξασφαλισμένη, ενώ σε αυτό συνεισφέρει και η συσκευασία των προϊόντων.Σχεδόν οι μισοί βιοκαλλιεργητές είναι συνεταιρισμένοι και εντοπίζονται στο νομό Λάρισας - θύλακας βιοκαλλιεργητών στο Δ. Σαρανταπόρου.Οι βιοκαλλιεργητές κηπευτικών της Θεσσαλίας είναι συνειδητοποιημένοι και τυπικοί στις υποχρεώσεις τους, γεγονός που συμβαδίζει με τις αειφορικές καλλιεργητικές πρακτικές που εφαρμόζουν, ενώ η στροφή στη δύσκολη λύση της βιολογικής γεωργίας έγινε με κύριο κίνητρο την περιβαλλοντική ευαισθησία και την ανάγκη τους να προστατέψουν την υγεία τους, την υγεία των παιδιών τους και την υγεία όλων.
description: The present study was conducted to examine the main characteristics of the organic growers, their practices, their attitudes and their preferences. The study also focuses on the relationship and the dependences that are developed among the variables that are examined. Interviews, questionnaires and the statistical data analysis (using the SPSS software) were the methods used in the study. The organic vegetables in Thessaly are cultivated by very few people, mainly young farmers with educational level higher than the average. The produre is sold easily and the packaging adds to it. Almost half of the organic growers are part of a cooperative located in the prefecture of Larissa, in Sarantapore council. The organic growers have a great sense of conscience and are very responsible- a fact that complies with the sustainable practices that are implemented. Moreover, the main motives for turning into organic farming were their sensitivity for the environment and the need to protect human health
Systematic study of nonmagnetic resistance changes due to electrical pulsing in single metal layers and metal/antiferromagnet bilayers
Creators: name: Jacot, B. J.
name: Krishnaswamy, G.
name: Sala, G.
name: Avci, C. O.
name: Vélez, S.
name: Gambardella, P.
name: Lambert, C. -H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Intense current pulses are often required to operate microelectronic and spintronic devices. Notably, strong current pulses have been shown to induce magnetoresistance changes attributed to domain reorientation in antiferromagnet/heavy metal bilayers and non-centrosymmetric antiferromagnets. In such cases, nonmagnetic resistivity changes may dominate over signatures of antiferromagnetic switching. We report systematic measurements of the current-induced changes of the transverse and longitudinal resistance of Pt and Pt/NiO layers deposited on insulating substrates, namely Si/SiO$_2$, Si/Si$_3$N$_4$, and Al$_2$O$_3$. We identify the range of pulse amplitude and length that can be used without affecting the resistance and show that it increases with the device size and thermal diffusivity of the substrate. No significant difference is observed in the resistive response of Pt and NiO/Pt devices, thus precluding evidence on the switching of antiferromagnetic domains in NiO. The variation of the transverse resistance is associated to a thermally-activated process in Pt that decays following a double exponential law with characteristic timescales of a few minutes to hours. We use a Wheatstone bridge model to discriminate between positive and negative resistance changes, highlighting competing annealing and electromigration effects. Depending on the training of the devices, the transverse resistance can either increase or decrease between current pulses. Further, we elucidate the origin of the nonmonotonic resistance baseline, which we attribute to training effects combined with the asymmetric distribution of the current. These results provide insight into the origin of current-induced resistance changes in metal layers and a guide to minimize nonmagnetic artifacts in switching experiments of antiferromagnets.
Ανάπτυξη διαδικτυακού περιβάλλοντος μελέτης περιπτώσεων για την επιμόρφωση των εκπαιδευτικών σχετικά με την αξιοποίηση των ΤΠΕ στο σχολικό περιβάλλον
Creators: name: Βουτυράκης, Μάριος Χαραλάμπους
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Μάθηση βασισμένη σε περιπτώσεις
Διαδικτυακό περιβάλλον μελέτης
ΤΠΕ (Τεχνολογίες Πληροφορίας κι Επικοινωνίας)
Επιμόρφωση καθηγητών
ΘΓΕ (Θεωρία γνωστικής ευελιξίας)
Πλαισιοθετημένη μάθηση
Case-based learning
Web-based learning environment
ICT (Information and communication technologies)
Teacher Personal Development
CFT (Cognitive Flexibility Theory)
Situated learning

description: Στην παρούσα εργασία κεντρικός στόχος είναι η δημιουργία ενός διαδικτυακού περιβάλλοντος μελέτη, το οποίο απευθύνεται σε καθηγητές της Δευτεροβάθμιας εκπαίδευσης, με γενικό στόχο την εκπαίδευσή τους στη χρήση των ΤΠΕ (τεχνολογιών πληροφορικής κι επικοινωνίας) για την πραγματοποίηση καινοτόμων παιδαγωγικών δραστηριοτήτων. Καθώς η εκπαίδευση σαν γνωστικό πεδίο είναι ένας χώρος ασθενώς δομημένων προβλημάτων, και καθώς η χρήση των ΤΠΕ είναι ένα προχωρημένο θέμα εκπαίδευσης, επιλέγουμε την μάθηση με περιπτώσεις και εφαρμόζουμε την Θεωρία της Γνωστικής Ευελιξίας(ΘΓΕ). Το περιβάλλον eCASE προσφέρει τα εργαλεία για αυτή την εφαρμογή. Στο κεφάλαιο 2 αυτής της εργασίας αναλύουμε τα θεωρητικά ζητήματα σε σχέση με την μελέτη περιπτώσεων και την ΘΓΕ. Στο κεφάλαιο 3 παρουσιάζουμε το περιβάλλον eCASE, τις δυνατότητές του και τις λειτουργίες του. Στο κεφάλαιο 4 περιγράφουμε την διαδασκαλία σχεδίασης του περιβάλλοντος μελέτης, δίνοντας πληθώρα εξηγήσεων και πρακτικών συμβουλών. Στο κεφάλαιο 5 τέλος, αναφέρουμε κάποια γενικά συμπεράσματα και ορισμένες προτάσεις διερεύνησης
description: The main purpose of this project is the creation of a web-based learning environment of secondary school teachers, having the general objective of training the teachers in the use of ICT (Information and Communication Technologies) as a mean of conducting innovating activities. Since education, as a knowledge domain, is a domain of ill-structured nature and, on the same time, the use of ICT is an advanced learning subject, we choose to use the case-based learning model and to apply the Cognitive Flexibility Theory(CFT). The eCase environment provides the appropriate tools for the application of CFT. In chapter 2, we analyse the theoretic context of this thesis, and more spesifically the theory relevant to the case studies and the CFT. In Chapter 3 we present the eCASE environment along with its features and its functions. In Chapter 4 we describe the procedure of organising and creating the learning environment, giving detailed explanation and many practical tips. Finally, in chapter 5, we present some general conclusions and some more specific suggestions for further investigation
Effect of Random Fiber Network and Fracture Toughness on the Onset of Cavitation in Soft Materials
Creators: name: Hasan, Fuad
name: Mahmud, Kah Al
name: Khan, Md Ishak
name: Kang, Wonmo
name: Adnan, Ashfaq
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Applied Physics (physics.app-ph)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Experimental and theoretical observations have agreed that the onset of cavitation in soft materials requires higher tensile pressure than pure water. The extra tensile pressure is required since the cavitating bubble needs to overcome the elastic energy in soft materials. In this manuscript, we have developed two models to study and quantify the extra tensile pressure. In the first approach, we proposed a strain energy based random fiber network (RFN) failure criteria in which interaction between the cavitating bubble and RFN is considered. Gelatin samples are prepared for different concentrations, and SEM images are used to study the microstructural properties of the RFN. A unit-cell model is introduced to evaluate the geometrical and mechanical properties of the RFN. The network strain energy formulation is then coupled with the bubble growth, and the critical condition is set as the fibers ultimate failure strain. We considered soft materials as homogeneous hyper-elastic Ogden material, and fracture-based failure criteria are proposed in the second approach. The critical energy release rate is considered for quantifying the extra tensile pressure. Both the models are then compared with the existing cavitation onset criteria of rubber like materials. The validation is done with the experimental results of threshold tensile pressure for different gelatin concentrations. We have found that due to the large distribution of the pore size in the network, the nucleation pressure is similar to water. Both models can moderately predict the extra tensile pressure within the intermediate range of gelatin concentrations. For low concentration, the network's non-affinity plays a significant role and must be incorporated. On the other hand, for higher concentrations, the entropic deformation dominates, and strain energy formulation is not adequate.
description: submitted to Journal of Mechanics and Physics of Solid
Canción titulada Sancahuarero
Creators: name: Quinchuya López, Amador
name: Santos Granero, Fernando
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: ame

description: Es una canción en el estilo de las canciones sagradas requerqueñets, ejecutadas en flautas de pan de cinco tubos.
‘Land is a huge integral part of our identity’: Patriarchy and the gender asset gap
Creators: name: Curtin, Mary
name: Murphy, Caroline
name: WOODS, UNA
name: CROSS, CHRISTINE
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 39
subject: Education
classificationCode: 48
subject: Law and legal studies

description: The aim of this article is to examine female participation in farming and more specifically, the reasons for the low rate of female farm ownership in Ireland where only 13% of Irish farm owners are female. Females are excluded from the occupation of a farmer because land ownership is the key needed in most instances to being a farmer in one’s own right. Females are farming, but too often, they are not owners of the farms they work on. We investigate the structural and cultural factors that alleviate or contribute to the inequality in Irish farm ownership. To address the research question, a qualitative study involving 35 semi-structured interviews was carried out with both women and men in the Irish farming sector. This research recognises the positive role the state can play, as supported by cultural and institutional theory, by making legal and financial policy changes that can help effect change.
The early-type galaxies NGC 1407 and NGC 1400 - II: star formation and chemical evolutionary history
Creators: name: Spolaor, Max
name: Forbes, Duncan A.
name: Proctor, Robert N.
name: Hau, George K. T.
name: Brough, Sarah
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a possible star formation and chemical evolutionary history for two early-type galaxies NGC 1407 and NGC 1400. They are the two brightest galaxies of the NGC 1407 (or Eridanus-A) group, one of the 60 groups studied as part of the Group Evolution Multi-wavelength Study (GEMS). Our analysis is based on new high signal-to-noise spatially resolved integrated spectra obtained at the ESO 3.6m telescope, out to 0.6 (NGC 1407) and 1.3 (NGC 1400) effective radii. Using Lick/IDS indices we estimate luminosity-weighted ages, metallicities and $α$-element abundance ratios. Colour radial distributions from HST/ACS and Subaru Suprime-Cam multi-band wide-field imaging are compared to colours predicted from spectroscopically determinated ages and metallicities using single stellar population models. The galaxies formed over half of their mass in a single short-lived burst of star formation (> 100 M(sun)/year) at redshift z>5. This likely involved an outside-in mechanism with supernova-driven galactic winds, as suggested by the flatness of the alpha-element radial profiles and the strong negative metallicity gradients. Our results support the predictions of the revised version of the monolithic collapse model for galaxy formation and evolution. We speculate that, since formation the galaxies have evolved quiescently and that we are witnessing the first infall of NGC 1400 in the group.
description: 14 pages, 9 tables, 6 figures, Accepted for publication in MNRAS
Επικοινωνιακή διδασκαλία και ορθόδοξη χριστιανική αγωγή στο σύγχρονο σχολείο
Creators: name: Ποιμενίδου, Χριστίνα Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Επικοινωνιακή διδασκαλία
Ομαδοσυνεργατική διδασκαλία
Μέθοδος protect
Βιωματική μάθηση
Κοσμική επικοινωνία
Χριστιανική κοινωνία
Communicative teaching
Cooperative teaching
The project method
Experimental learning
Secular communication
Christian communion

description: Η σύγχρονη παιδαγωγική επιστήμη προσπαθεί να εξετάσει και να βελτιώσει την παιδαγωγική σχέση και τη διδασκαλία γενικότερα, με την εφαρμογή νέων μεθόδων ιδασκαλίας όπως η επικοινωνιακή, η ομαδοσυνεργατική και η μέθοδος project.Ωστόσο παρατηρείται ένα κενό και μια αδυναμία γενικότερα, τόσο στη θεωρία όσο και στην πράξη, όσο αφορά στις σχέσεις που δημιουργούνται κατά την παιδαγωγική διαδικασία. Η αδυναμία αυτή κρίνεται πως μπορεί να θεραπευθεί μόνο με τη συμβολή της ορθόδοξης χριστιανικής αγωγής, η οποία προσφέρει αληθινές και ουσιαστικές προτάσεις συνύπαρξης, συμβίωσης και κοινωνίας. Η επικοινωνιακή προσέγγιση της μάθησης με βάση την ομαδική εργασία, προωθεί την αμοιβαιότητα και περιορίζει τον εγωισμό, χωρίς ωστόσο να πετυχαίνει τη βαθιά και ουσιαστική αλληλογνωριμία των συμβαλλομένων στην εκπαίδευση, γεγονός που μπορεί να επιτευχθεί μόνο μέσα από την ορθόδοξη προσέγγιση των ανθρώπινων σχέσεων, όπου κυριαρχούν ο αμοιβαίος σεβασμός και η αγάπη
description: Contemporary pedagogics attempts to explore and improve teacher-student relations as well as the teaching process in general, through the implementation of new teaching methods such as communicative teaching, cooperative teaching and the project method. The problem noted, in theory and in practice concerning the relations formed during the teaching process could be remedied only through the contribution of orthodox christian education, which offers genuine and essential proposals of coexistence and communion. The communicative approach of learning, based on team work, enhances mutuality and moderates selfishness, without however attaining profound teacher-student relations, which can only be achieved through the orthodox approach of human relations, where mutual love and respect prevail
Outflow Zone Indication of Geothermal System in Paguyangan Hotspring, Brebes, Central Java
Creators: name: Iswahyudi, Sachrul
name: Asmoro Widagdo
name: Niniek Rina Herdianita
name: Subana Solahudin
Publisher: name: figshare
Year: 2021
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences
subject: 40603 Hydrogeology

description: The presence of hot springs in the Paguyangan area is interesting to study further. The research question is whether the hot springs are included in the upflow or outflow zone of a geothermal system. For this purpose, laboratory analysis of major elements and types of hot water (apart from other analyzes) was carried out. The results of the analysis show that the hot springs that appear in the study area are included in the outflow zone of the geothermal system. Further research is needed to determine whether the hot springs are part of the Slamet Volcano geothermal system or some other system.
Accretion by Isolated Neutron Stars
Creators: name: Ikhsanov, N. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Accretion of interstellar material by an isolated neutron star is discussed. The point I address here is the interaction between the accretion flow and the stellar magnetosphere. I show that the interchange instabilities of the magnetospheric boundary under the conditions of interest are basically suppressed. The entry of the material into the magnetosphere is governed by diffusion. Due to this reason the persistent accretion luminosity of isolated neutron stars is limited to < 4E+26 erg/s. These objects can also appear as X-ray bursters with the burst durations of about 30 minutes and repetition time of about 1E+5 yr. This indicates that the number of the accreting isolated neutron stars which could be observed with recent and modern X-ray missions is a few orders of magnitude smaller than that previously estimated.
description: 3 pages, to appear in Astrophysics and Space Science, in the proceedings of "Isolated Neutron Stars: from the Interior to the Surface", edited by D. Page, R. Turolla and S. Zane
Sending or not sending twin-field quantum key distribution with distinguishable decoy states
Creators: name: Lu, Yi-Fei
name: Jiang, Mu-Sheng
name: Wang, Yang
name: Zhang, Xiao-Xu
name: Liu, Fan
name: Zhou, Chun
name: Li, Hong-Wei
name: Bao, Wan-Su
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Twin-field quantum key distribution (TF-QKD) and its variants can overcome the fundamental rate-distance limit of QKD which has been demonstrated in the laboratory and field while their physical implementations with side channels remains to be further researched. We find the external modulation of different intensity states through the test, required in those TF-QKD with post-phase compensation, shows a side channel in frequency domain. Based on this, we propose a complete and undetected eavesdropping attack, named passive frequency shift attack, on sending or not-sending (SNS) TF-QKD protocol given any difference between signal and decoy states in frequency domain which can be extended to other imperfections with distinguishable decoy states. We analyze this attack by giving the formula of upper bound of real secure key rate and comparing it with lower bound of secret key rate under Alice and Bob's estimation with the consideration of actively odd-parity pairing (AOPP) method and finite key effects. The simulation results show that Eve can get full information about the secret key bits without being detected at long distance. Our results emphasize the importance of practical security at source and might provide a valuable reference for the practical implementation of TF-QKD.
description: 10 pages, 4 figures
Using Optical Spectroscopy to Map the Geometry and Structure of the Irradiated Accretion Discs in Low-mass X-ray Binaries: The Pilot-Study of MAXI J0637$-$430
Creators: name: Tetarenko, B. E.
name: Shaw, A. W.
name: Manrow, E. R.
name: Charles, P. A.
name: Miller, J. M.
name: Russell, T. D.
name: Tetarenko, A. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The recurring transient outbursts in low-mass X-ray binaries (LMXBs) provide us with strong test-beds for constraining the poorly understood accretion process. While impossible to image directly, phase-resolved spectroscopy can provide a powerful diagnostic to study their highly complex, time-dependent accretion discs. We present an 8-month long multi-wavelength (UV, optical, X-ray) monitoring campaign of the new candidate black hole LMXB MAXI J0637$-$430 throughout its 2019/2020 outburst, using the {\em Neil Gehrels Swift Observatory}, as well as three quasi-simultaneous epochs of Gemini/GMOS optical spectroscopy. We find evidence for the existence of a correlation between the X-ray irradiation heating the accretion disc and the evolution of the He {\sc ii} 4686 Åemission line profiles detected in the optical spectra. Our results demonstrate a connection between the line emitting regions and physical properties of the X-ray irradiation heating the discs during outburst cycles of LMXBs. Further, we are able to show that changes in the physical properties of the irradiation heating the disc in outburst can be imprinted within the H/He emission line profiles themselves in these systems.
description: 23 pages (including 3 appendices), 10 figures, supplementary figures included in the appendices, accepted for publication in MNRAS
Η φροντίδα και η επαγγελματική ταυτότητα των εκπαιδευτικών της πρωτοβάθμιας εκπαίδευσης
Creators: name: Παπαδημητρίου, Φανή Λάζαρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Ηθική της φροντίδας
Φύλο
Σχολείο της φροντίδας
Επαγγελματική ταυτότητα
Εκπαιδευτικοί πρωτοβάθμιας
Ολοήμερο σχολείο
Ethics care
Gender
Caring school
Professional identity
Elementary teachers
Day-long school

description: Η φροντίδα ως εγγενές στοιχείο της ηθικής προσωπικότητας των ατόμων, μαθαίνεται και ασκείται κυρίως στα πλαίσια της οικογένειας, ενώ ως στοιχείο ενός ορισμένου ethos μεταφέρεται στην επόμενη γενιά, διαμορφώνοντας τις αντιλήψεις τους σχετικά με τη φροντίδα των άλλων και παράγοντας αντίστοιχους τρόπους πρακτικής της άσκησης. Ιστορικά η κοινωνικά κατασκευασμένη "γυναικεία" εικόνα της φροντίδας και ο συναισθηματικός και ιδιωτικός της χαρακτήρας, συντελούν στη μη θεώρησή της ως επαγγελματικής αξίας, ενώ όταν εφαρμόζεται στον επαγγελματικό χώρο,τείνει να υπονομεύει την επαγγελματική ταυτότητα όσων την ασκούν. Το ίδιο συμβαίνει και στην πρωτοβάθμια εκπαίδευση όπου εκπαιδευτικοί και των 2 φύλων, θεωρούν πως η περαιτέρω ενίσχυσή της στο σχολείο τους υπονομεύει επαγγελματικά. Στις γυναίκες ειδικότερα γιατι ενισχύει τη μητρική αντιμετώπιση της διδασκαλίας και τις εγκλωβίζει σε παραδοσιακές ταυτότητες εμποδίζοντας την ανέλιξή τους, ενώ στους άνδρες γιατί η άσκησή της επιτρέπεται μόνο αν τηρούνται καποιοι κανόνες. Οι συνέπειες αυτές γίνονται ιδιαίτερα φανερές στην περίπτωση του ολοήμερου σχολείου όπου επιπλέον υπάρχουν ερωτήματα για το "είδος" της φροντίδας και τα συνεπαγόμενα καθήκοντα που επωμίζονται οι εκπαιδευτικοί
description: The care as an innate element of the moral personality of individuals, is learned and taught mainly in the frames of the family, while as an element of a certain "ethos" is transported in the next generation, producing corresponding ways of perceptions and practices. Historically, the socially made picture of care as "woman" activity tends to undermine her professionalism, as it is considerend due to her sentimental and private character, as professional value. In the elementary education similarly the teachers, even if they know that the care is an element of their role, they consider that they are professionally underminded by it. Women, more specifically strengthen the maternal confrontation of teaching, enslaving them in traditional identities and preventing their evolution, while men care only with certain rules. These consequenses become particularly dovius in the case of Day long School , where some questions exist for the type of care that should be provided by teachers