cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phase diagram of a polarized Fermi gas across a Feshbach resonance in a potential trap
Creators: name: Yi, W.
name: Duan, L. -M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We map out the detailed phase diagram of a trapped ultracold Fermi gas with population imbalance across a wide Feshbach resonance. We show that under the local density approximation, the properties of the atoms in any (anisotropic) harmonic traps are universally characterized by three dimensionless parameters: the normalized temperature, the dimensionless interaction strength, and the population imbalance. We then discuss the possible quantum phases in the trap, and quantitatively characterize their phase boundaries in various typical parameter regions.
description: 9 pages, 4 figures
Από τη δίγλωσση εκπαίδευση στις Ειδικές Μαθησιακές Διαταραχές: Βιβλιογραφική ανασκόπηση
Creators: name: Τσιγγούρ, Σεβγούλ Χαλήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Διγλωσσία
Ειδική Μαθησιακή Διαταραχή
Παρέμβαση
Bilingualism
Specific Learning Disorder
Intervention

description: Στην παρούσα εργασία θα εξετάσουμε το ζήτημα της διγλωσσίας καθώς επίσης και τον τρόπο με τον οποίο αυτή συνδέεται με τις Ειδικές Μαθησιακές Διαταραχές (Ε.Μ.Δ.). Η διγλωσσία είναι ένα πολύ γνωστό φαινόμενο, τόσο στο εξωτερικό όσο και στην Ελλάδα. Πολλά παιδιά χειρίζονται δύο γλώσσες σε ικανοποιητικό βαθμό, όμως συναντώνται και δίγλωσσα παιδιά τα οποία αντιμετωπίζουν δυσκολίες και προβλήματα κατά τη μαθησιακή διαδικασία. Τόσο οι γονείς όσο και οι εκπαιδευτικοί χρειάζεται να παρατηρούν την όποια δυσκολία στην ανάπτυξη του λόγου και της ομιλίας του παιδιού ώστε να επιληφθούν του ζητήματος και να παρέχουν την κατάλληλη μέριμνα και παρέμβαση. Σημαντικό ρόλο διαδραματίζει ο ειδικός ο οποίος επιδίδεται, με βάση τις γνώσεις και την εμπειρία του, στην αντιμετώπιση των όποιων δυσκολιών συναντάει το παιδί. Εξάλλου, η διγλωσσία πέρα από τη χρησιμότητα και τα οφέλη που μπορεί να προσφέρει, ενδέχεται να επιφέρει και σημαντικές δυσκολίες που όχι μόνο επηρεάζουν αρνητικά την πρόοδο του παιδιού, αλλά ασκεί επιρροές στην ψυχική και κοινωνική του εξέλιξη. Συνεπώς, η βαθύτερη γνώση της διγλωσσίας και των διαστάσεων της θα συνδράμει καταλυκτικά όχι μόνο στην κατανόηση των γλωσσικών διαταραχών των δίγλωσσων μαθητών, αλλά θα αποτελέσει και πολύτιμο εργαλείο για την διερεύνηση της μεταξύ τους σύνδεσης. Έτσι, είναι εφικτή η αποτελεσματική διαχείρηση τους και η προαγωγή των γλωσσικών ελλειμάτων που παρατηρούνται στην δίγλωσση εκπαίδευση
description: In this thesis, we are going to discuss the issue of bilingualism and how it relates to specific learning disorders. Bilingualism is a well-known phenomenon not only in Greece but also at international level. Many children handle two languages satisfactory, but also bilingual children encounter difficulties and problems during the learning process. Both parents and teachers need to observe the difficulties of children’s speech in order to address the issue and provide appropriate care and intervention. An important role is played also by the specialist, who based on his or her knowledge and experience, is capable of coping with any difficulties encountered by the child. Although bilingualism can become useful and beneficial, it can also cause significant difficulties that not only affects negatively the child's progress, but also influences the mental and social development. Consequently, a deeper knowledge of bilingualism and its dimensions will play a crucial role not only by understanding the language disorders of bilingual students, but will also be a valuable tool for investigating the relationship between them. It is therefore possible to manage these disorders effectively and promote/support the linguistic deficits observed in bilingual education
AYOLLARNI MEHNAT QILISH HUQUQINI TARTIBGA SOLUVCHI XALQARO HUQUQIY HUJJATLAR VA ULARNING MILLIY QONUNCHILIKDA AKS ETISHI: QIYOSIY-HUQUQIY TAHLIL
Creators: name: Raximova, Kamola
Publisher: name: Zenodo
Year: 2024

description: Dunyoda inson huquqlari, uning ajralmas tarkibiy qismi sanalgan adolatli mehnatga bo‘lgan huquqni ta’minlash, ushbu jarayonda davlatlar zimmasiga alohida mas’uliyat yuklash masalalari tobora global va dolzarb ahamiyat kasb etib bormoqda. Ayniqsa, bu holat gender tengligini ta’minlash, yoshlarning mehnatga bo‘lgan huquqlarini himoya qilish, bolalar mehnatiga hamda majburiy mehnatga yo‘l qo‘ymaslik masalalarida yaqqol namoyon bo‘ladi.
Kwa wordlist, relativization, vowel hiatus
Creators: name: Koutouan, Evelyne
name: Jarvis, Rebecca
name: Russell, Katherine
name: Kouadio, Timothée
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: ebr

description: Elicitation of lexical items corresponding to Stewart (2002)'s reconstructed forms for Proto-Kwa. Elicitation of relative clauses.
An Introduction to the Nonperturbative Renormalization Group
Creators: name: Delamotte, Bertrand
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An elementary introduction to the non-perturbative renormalization group is presented mainly in the context of statistical mechanics. No prior knowledge of field theory is necessary. The aim is this article is not to give an extensive overview of the subject but rather to insist on conceptual aspects and to explain in detail the main technical steps. It should be taken as an introduction to more advanced readings.
description: 56 pages
title: The state of university-business cooperation in Saint Petersburg
Creators: name: Viktorova, Elena
name: Petrenko, Daria
name: Zaynullina, Alyona
name: Shishkina, Eugenia
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie, 79, 221-242
D-dimensional unitarity cut method
Creators: name: Anastasiou, Charalampos
name: Britto, Ruth
name: Feng, Bo
name: Kunszt, Zoltan
name: Mastrolia, Pierpaolo
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop a unitarity method to compute one-loop amplitudes with massless propagators in d=4-2*epsilon dimensions. We compute double cuts of the loop amplitudes via a decomposition into a four-dimensional and a -2*epsilon-dimensional integration. The four-dimensional integration is performed using spinor integration or other efficient techniques. The remaining integral in -2*epsilon dimensions is cast in terms of bubble, triangle, box, and pentagon master integrals using dimensional shift identities. The method yields results valid for arbitrary values of epsilon.
description: 4 pages. v2: references changed
Fragile versus stable two-dimensional fermionic quasiparticles
Creators: name: Ahn, Seongjin
name: Sarma, Sankar Das
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We provide a comprehensive theoretical investigation of the Fermi liquid quasiparticle description in two-dimensional electron gas interacting via the long-range Coulomb interaction by calculating the electron self-energy within the leading-order approximation, which is exact in the high-density limit. We find that the quasiparticle energy is larger than the imaginary part of the self-energy up to very high energies, implying that the basic Landau quasiparticle picture is robust up to far above the Fermi energy. We find, however, that the quasiparticle picture becomes fragile in a small discrete region around a critical wave vector where the quasiparticle spectral function strongly deviates from the expected quasiparticle Lorentzian line shape with a vanishing renormalization factor. We show that such a non-Fermi liquid behavior arises due to the coupling of quasiparticles with the collective plasmon mode. This situation is somewhat intermediate between the one-dimensional interacting electron gas (i.e., Luttinger liquid), where the Landau Fermi liquid theory completely breaks down since only bosonic collective excitations exist, and three-dimensional electron gas, where quasiparticles are well-defined and more stable against interactions than in one and two dimensions. We use a number of complementary definitions for a quasiparticle to examine the interacting spectral function, contrasting two-dimensional and three-dimensional situations critically.
description: 21 pages, 16 figures
title: Brain Drain in Finland; A real Threat or a myth and its impact on Finland’s R&D capabilities
Creators: name: Zafar, Afnan
name: Kantola, Jussi
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie, 79, 243-256
title: Entrepreneurial Mindset and Multicultural Communication Skills: a Reflection on the ECMT+ Intensive Programme
Creators: name: Badzińska, Ewa
name: Timonen, Liisa
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie, 79, 5-19
Majorana Fermions, Exact Mappings between Classical and Topological Orders
Creators: name: Chen, Han-Dong
name: Hu, Jiangping
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Motivated by the duality between site-centered spin and bond-centered spin in one-dimensional system, which connects two different constructions of fermions from the same set of Majorana fermions, we show that two-dimensional models with topological orders can be constructed from certain well-known models with classical orders characterized by symmetry-breaking. Topology-dependent ground state degeneracy, vanishing two-point correlation functions, and unpaired Majorana fermions on boundaries emerge naturally from such construction. The approach opens a new way to construct and characterize topological orders.
description: 5 pages, 4 figures
Environment Impact Factors
Creators: name: Smith, Phillip
Publisher: name: Monash University
Year: 2021
Subjects: subject: 100605 Performance Evaluation; Testing and Simulation of Reliability
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Equation and discussion of impact quantisation for obstacle and jammer challenges in networking task for robotic swarm.
Throughput performance of tree collision resolution algorithms with capture
Creators: name: Wong, Kenneth K. L.
Publisher: name: University of British Columbia
Year: 2009

description: The effect of capture on tree algorithms in a slotted ALOHA broadcasting network is investigated. Two receiver models are considered: Feedback With Capture (FWC) and Feedback Without Capture (FWOC). In FWC, the receiver is able to distinguish between a success and capture slot, whereas in FWOC it is not. For each model, two collision resolution schemes are examined. The throughput performances of the four schemes using the discrete and continuous capture models are obtained and compared. In the discrete capture model, the transmitters are divided into groups. Only packets from transmitters in a more dominant group have a chance to be captured. The continuous capture model is used to examine the throughput performance on the inbound (mobile-to-base station) channel in a packet radio system consisting of a central base station and a number of mobile user terminals. The use of a dynamic tree (DT) algorithm in a continuous capture environment is also investigated. Expressions for finding the average length of a collision resolution interval (CRI) for each scheme using the static binary tree are derived. These average lengths are used to determine the throughput. Numerical procedures are described which use the static binary tree results in the dynamic tree to estimate the throughput. Simulations are used to verify the maximum achievable throughput in DT which also give plots of the average packet delay against the arrival rate.
On the Equation of State of the Gluon Plasma
Creators: name: Zwanziger, Daniel
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a local, renormalizable, BRST-invariant action for QCD in Coulomb gauge that contains auxiliary bose and fermi ghost fields. It possess a non-perturbative vacuum that spontaneously breaks BRST-invariance. The vacuum condition leads to a gap equation that introduces a mass scale. Calculations are done to one-loop order in a perturbative expansion about this vacuum. They are free of the finite-$T$ infrared divergences found by Lindé and which occur in the order $g^6$ corrections to the Stefan-Boltzmann equation of state. We obtain a finite result for these corrections.
description: 8 pages, Talk given at Quark Confinement and Hadron Spectrum VII, 2-7 September, 2006, Ponta Delgada, Azores, Portugal
Σύμμειξη εννοιών και μουσική δημιουργία: Εμπειρική αξιολόγηση υπολογιστικού συστήματος μελωδικής εναρμόνισης
Creators: name: Χασιώτης, Αναστάσιος Ιωάννης
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Σύμμειξη εννοιών
Υπολογιστική δημιουργικότητα
Εμπειρική αξιολόγηση
Conceptual blending
Computational creativity
Empirical evaluation

description: Στα πλαίσια του ευρωπαϊκού προγράμματος COINVENT έχει αναπτυχθεί ένα υπολογιστικό μοντέλο μελωδικής εναρμόνισης (CHAMELEON), το οποίο χρησιμοποιεί τις αρχές της θεωρίας σύμμειξης εννοιών ως μέσο για την εφεύρεση υβριδικών ή πρωτότυπων αρμονικών ιδιωμάτων. Στόχος αυτής της εργασίας είναι η αξιολόγηση της δημιουργικότητας του υπολογιστικού μοντέλου από ακροατές (παιδιά και ενήλικες) μέσω της κατάταξης ενός αριθμού πρωτότυπων μελωδικών εναρμονίσεων που δημιουργούνται από τον υπολογιστή. Οι μελωδίες, οι οποίες προέρχονται από διαφορετικά ιδιώματα, είτε εναρμονίζονται σύμφωνα με τους αρμονικούς κανόνες του αρχικού ιδιώματος, είτε σύμφωνα με τους κανόνες ενός διαφορετικού ιδιώματος (σύμμειξη μελωδίας - αρμονίας), είτε με το συνδυασμό ιδιωμάτων και τρόπων (σύμμειξη αρμονίας - αρμονίας). Η πειραματική διαδικασία περιλαμβάνει την κατάταξη των ερεθισμάτων στα αρχικά ιδιώματα / τρόπους (π.χ. Bach / Jazz, μείζονα / ελάσσονα) ή ανάμεσα σε αυτά ή σε ξεχωριστή κατηγορία (Άλλο). Τα αποτελέσματα δείχνουν ότι η αρμονική σύμμειξη γίνεται αντιληπτή από τους ακροατές ιδιαίτερα στην περίπτωση της σύμμειξης τρόπων (μείζονα / ελάσσονα) ενώ τα παιδιά έχουν δυσκολία στην αναγνώριση σύμμειξης αρμονικών ιδιωμάτων.
description: In the context of the European COINVENT project, a computational melodic harmonisation model (CHAMELEON) has been developed that employs the principles of conceptual blending theory as a means for the invention of hybrid or novel harmonic idioms. The aim of this study is to evaluate empirically the creativity of the computational model. Melodies originating from various idioms were harmonised either according to the harmonic rules of the original idiom, according to the rules of a different idiom (melody–harmony blends), or by blending idioms / modes (harmony–harmony blends). The experimental procedure involves the classification of the stimuli as instances of the initial idioms / modes (e.g. Bach / Jazz, major / minor), in between them, or in a different category (Other). Results show that harmonic blending is recognised by listeners (children and adults) especially in the case of mode blending (major / minor) and also in melody-harmony blends, whereas children have difficulty in recognising harmonic idiom blending.
description: Σε συνεργασία με: Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Two Loop Scalar Bilinears for Inflationary SQED
Creators: name: Prokopec, T.
name: Tsamis, N. C.
name: Woodard, R. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We evaluate the one and two loop contributions to the expectation values of two coincident and gauge invariant scalar bilinears in the theory of massless, minimally coupled scalar quantum electrodynamics on a locally de Sitter background. One of these bilinears is the product of two covariantly differentiated scalars, the other is the product of two undifferentiated scalars. The computations are done using dimensional regularization and the Schwinger-Keldysh formalism. Our results are in perfect agreement with the stochastic predictions at this order.
description: 43 pages, LaTeX 2epsilon, 5 figures (using axodraw.sty) Version 2 has updated references and important corrections to Tables 3-5 and to eqns (139-141), (145-146), (153-155), (158) and (160)
Maximal violation of tight Bell inequalities for maximal high-dimensional entanglement
Creators: name: Lee, Seung-Woo
name: Jaksch, Dieter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a Bell inequality for high-dimensional bipartite systems obtained by binning local measurement outcomes and show that it is tight. We find a binning method for even d-dimensional measurement outcomes for which this Bell inequality is maximally violated by maximally entangled states. Furthermore, we demonstrate that the Bell inequality is applicable to continuous variable systems and yields strong violations for two-mode squeezed states.
description: 4+ pages, 2 figures; published version
Kwa wordlist, states, reflexives
Creators: name: Doko, Jeanne
name: Koutouan, Evelyne
name: Jarvis, Rebecca
name: Russell, Katherine
name: Kouadio, Timothée
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: ebr

description: Elicitation of minimal pairs between /d/ and /l/ and lexical items corresponding to Stewart (2002)'s reconstructed forms for Proto-Kwa. Elicitation of reflexive paradigms.
Fertilisation of maize after catch crops, based on the improved valorisation of organic fertilisers
Creators: name: Ahnemann, Hauke
Publisher: name: Zenodo
Year: 2022
Subjects: DiverIMPACTSPA
Multiple cropping
Cropping system
Field

description: Problem Maize is one of the most important crops in Germany (approx. 22% of arable land), especially on dairy farms and farms with biogas production. Due to an often-inefficient use of available organic fertilisers, additional inorganic fertilisers are often applied as well. This often leads to nitrate leaching. Solution Nitrogen (N) can be used more efficiently and inorganic fertiliser usage can be reduced through the use of organic fertilisers, slurry injection and catch crops (whether these are leguminous or not) in maize cropping systems. Indeed, the implementation of catch crops mitigates nitrate leaching during the winter and keeps it available for the following crop.
"OILA" KONSEPTOSFERASINING METAFORIK IFODADA VOQELANISHI (INGLIZ TILI MISOLIDA)
Creators: name: Xalilova, Muhtarama
Publisher: name: Zenodo
Year: 2024

description: Til va madaniyatning o‘zaro yaqinligi va aloqadorligi ularni yagona metodologik asosda o‘rganish imkonini berdi. Metaforalarda obrazlilik, badiiylik, tasvir bayoni keng bo‘ladi. Metaforalarda shakl va ma’no nomuvofiqligi yaqqol ko‘zga tashlanib, tafakkurning bebaho namunasi yuzaga chiqadi. Metaforalar xalqning mentaliteti, milliy xarakteri, turmush tarzi, an’analari, urf-odati, axloqiy normalari, qadr-qimmati bilan uzviylikda namoyon bo‘ladi.
Tone with adjectives and adpositions, modals and states
Creators: name: Koutouan, Evelyne
name: Jarvis, Rebecca
name: Russell, Katherine
name: Kouadio, Timothée
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: ebr

description: Elicitation of tonal behavior following tones of different melodies (final H, final floating L) especially in combination with following adjectives and postpositions. Elicitation of modals ('can', 'have to', etc) and stative verbs.
Topological invariants of piecewise hereditary algebras
Creators: name: Meur, Patrick Le
Publisher: name: arXiv
Year: 2007
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16G10, 18G10

description: We investigate the Galois coverings of piecewise algebras and more particularly their behaviour under derived equivalences. Under a technical assumption which is satisfied if the algebra is derived equivalent to a hereditary algebra, we prove that there exists a universal Galois covering whose group of automorphisms is free and depends only on the derived category of the algebra. As a corollary, we prove that the algebra is simply connected if and only if its first Hochschild cohomology vanishes.
description: The hypotheses of the main theorem were modified: The next now deals mainly with piecewise hereditary algebras which are derived equivalent to a hereditary algebra (instead of all piecewise hereditary algebras in the previous version)
Coarse structures and group actions
Creators: name: Brodskiy, N.
name: Dydak, J.
name: Mitra, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Metric Geometry (math.MG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: The main results of the paper are: \begin{Prop}\label{GenSvarc-Milnor} A group $G$ acting coarsely on a coarse space $(X,\CC)$ induces a coarse equivalence $g\to g\cdot x_0$ from $G$ to $X$ for any $x_0\in X$. \end{Prop} Theorem: \label{GenGromovThm} Two coarse structures $\CC_1$ and $\CC_2$ on the same set $X$ are equivalent if the following conditions are satisfied: \begin{enumerate} \item Bounded sets in $\CC_1$ are identical with bounded sets in $\CC_2$, \item There is a coarse action $ϕ_1$ of a group $G_1$ on $(X,\CC_1)$ and a coarse action $ϕ_2$ of a group $G_2$ on $(X,\CC_2)$ such that $ϕ_1$ commutes with $ϕ_2$. \end{enumerate} They generalize the following two basic results of coarse geometry: Proposition: [Švarc-Milnor Lemma {\cite[Theorem 1.18]{Roe lectures}}] \label{Svarc-Milnor} A group $G$ acting properly and cocompactly via isometries on a length space $X$ is finitely generated and induces a quasi-isometry equivalence $g\to g\cdot x_0$ from $G$ to $X$ for any $x_0\in X$. Theorem: [Gromov {\cite[page 6]{Gro asym invar}}] \label{GromovThm} Two finitely generated groups $G$ and $H$ are quasi-isometric if and only if there is a locally compact space $X$ admitting proper and cocompact actions of both $G$ and $H$ that commute.
description: 11 pages
Regenerative tree growth: Binary self-similar continuum random trees and Poisson--Dirichlet compositions
Creators: name: Pitman, Jim
name: Winkel, Matthias
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J80 (Primary)

description: We use a natural ordered extension of the Chinese Restaurant Process to grow a two-parameter family of binary self-similar continuum fragmentation trees. We provide an explicit embedding of Ford's sequence of alpha model trees in the continuum tree which we identified in a previous article as a distributional scaling limit of Ford's trees. In general, the Markov branching trees induced by the two-parameter growth rule are not sampling consistent, so the existence of compact limiting trees cannot be deduced from previous work on the sampling consistent case. We develop here a new approach to establish such limits, based on regenerative interval partitions and the urn-model description of sampling from Dirichlet random distributions.
description: Published in at http://dx.doi.org/10.1214/08-AOP445 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Απομόνωση και Ταυτοποίηση Κλινικού Δείγματος Μεσεγχυματικών Κυττάρων από Λιπώδη Ιστό για την Ανάπτυξη Ιστοτεχνολογικού Υποκατάστατου Ρινικού Διαφράγματος
Creators: name: Λιαρετίδου, Ευθυμία Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Μεσεγχυματικά Βλαστικά Κύτταρα Λιπώδους Ιστού
Τριγενής διαφοροποίηση
Αναγεννητική Ιατρική
Adipose-Derived Mesenchymal Stem Cells
Trilineage differentiation
Regenerative Medicine

description: Σκοπός της παρούσας Διπλωματικής Εργασίας ήταν η απομόνωση ανάπτυξη και ταυτοποίηση μεσεγχυματικών βλαστικών κυττάρων από λιπώδη ιστό κλινικού δείγματος ανθρώπου μέσα στα πλαίσια μεταφραστικής έρευνας για την ιστοτεχνολογική ανάπτυξη χόνδρου ρινικού διαφράγματος. Με την βοήθεια προηγμένων τεχνικών καλλιέργειας κυττάρων και ταυτοποίησης τους με κυτταρομετρία ροής, επιδιώξαμε την ανάπτυξη και συγκέντρωση ικανοποιητικού αριθμού κυττάρων. Στην συνέχεια, επήγαμε την τριγενή διαφοροποίηση των κυττάρων προς χονδροκύτταρα, οστεοκύτταρα και λιποκύτταρα. Τελικά, αξιολογήσαμε την τριγενή διαφοροποίηση, ποιοτικά, με ιστολογικές χρώσεις και ποσοτικά με πραγματικού χρόνου ανάστροφης μεταγραφής αλυσιδωτή αντίδραση πολυμεράσης, πιστοποιώντας τα κύτταρα μας ως μεσεγχυματικά. Απώτερος στόχος της ερευνητικής μας ομάδας αποτελεί ο αποικισμός των παραγόμενων χονδροκυττάρων σε βιοσυμβατό ικρίωμα υποκατάστατου ρινικού διαφράγματος. Συμπερασματικά, με την παρούσα Διπλωματική Εργασία πέτυχαμε την εδραίωση συνθηκών καλής παρασκευαστικής τεχνικής για την μετέπειτα κλινική πράξη, συμβάλλοντας στην γεφύρωση του βασικού και κλινικού επιστημονικού πεδίου στο ιατρικό μας τμήμα.
description: The aim of the present master thesis was the isolation, expansion and identification of adipose derived mesenchymal stem cells from a human clinical sample, conducting translational research for a tissue engineered nasal septum cartilage. By the means of advanced cell culture techniques and cell cytometry for cell identification, we pursued the development and the concentration of a satisfying number of cells. Then, we inducted trilineage differentiation of these cells to chondrocytes, osteocytes and adipocytes. Finally, trilineage differentiation was evaluated, qualitatively, with histological dyes and quantitatively with real time reverse transcriptase polymerase chain reaction confirming the mesenchymal identity of our cells. Our future purpose is the colonization of the produced chondrocytes into a biocompatible scaffold of nasal septum. In conclusion, with the present master thesis we succeeded to establish good manufacturing practice conditions for our involvement in clinical field, contributing to the bridging of basic and clinical scientific field of our medical department.
The jet collimation profile at high resolution in BL Lacertae
Creators: name: Casadio, C.
name: MacDonald, N. R.
name: Boccardi, B.
name: Jorstad, S. G.
name: Marscher, A. P.
name: Krichbaum, T. P.
name: Hodgson, J. A.
name: Kim, J-Y.
name: Traianou, E.
name: Weaver, Z. R.
name: Garrido, M. Gómez
name: García, J. González
name: Kallunki, J.
name: Lindqvist, M.
name: Sánchez, S.
name: Yang, J.
name: Zensus, J. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Controversial studies on the jet collimation profile of BL Lacertae (BL Lac), the eponymous blazar of BL Lac objects class, complicate the scenario in this already puzzling class of objects. Understanding the jet geometry, in connection with the jet kinematics and the physical conditions in the surrounding medium, is fundamental to better constrain the formation, acceleration and collimation mechanisms in extragalactic jets. With the aim of investigating the jet geometry in the innermost regions of the jet of BL Lac, and solving the controversy, we explore the radio jet in this source, using high resolution millimeter-wave VLBI data. We collect 86GHz GMVA and 43GHz VLBA data to obtain stacked images that we use to infer the jet collimation profile by means of two comparable methods. We analyze the kinematics at 86GHz, and we discuss it in the context of the jet expansion. Finally we consider a possible implication of the Bondi sphere in shaping the different expanding region observed along the jet. We found that the jet in BL Lac expands with an overall conical geometry. A higher expanding rate region is observed between ~5 and 10 pc (de-projected) from the black hole. Such a region is associated with the decrease in brightness usually observed in high-frequency VLBI images of BL Lac. The jet retrieves the original jet expansion around 17 pc, where the presence of a recollimation shock is supported by both the jet profile and the 15GHz kinematics (MOJAVE survey). The change in the jet expansion profile occurring at ~5 pc could be associated with a change in the external pressure profile in correspondence of the Bondi radius (~3.3X10$^5$$R_s$).
description: 10 pages, 12 figures. Accepted for publication in Astronomy & Astrophysics
Entwicklung einer Webapplikation zur Visualisierung von Simulationstrajektorien
Creators: name: Erichson, Felix
Publisher: name: Zenodo
Year: 2019
Subjects: simulation
visualization
webapplication
water transport kidney

description: Biologische Prozesse können mithilfe von Modellen mathematisch analysiert werden und durch Visualisierungsapplikationen können die Ergebnisse der Modelle interpretierbar dargestellt werden. Das Modell befasst sich mit der Wasserrückführung in renalen Hauptzellen. Dabei wurden die primäre Hormonantwort, die Bewegung von Vesikeln sowie die Exozytose als auch die Endozytose modelliert und simuliert. Diese Arbeit beschreibt die Entwicklung einer Webapplikation um Simulationstrajektorien zu visualisieren. Es wurde eine räumliche Darstellung des Modells entwickelt, welche Kompartimente anordnet und Konzentrationen einzelner Moleküle farblich darstellt. Durch die Positionierung von Kompartimenten erhält man eine Vorstellung der Topologie des Systems. Durch die Darstellung der Konzentrationen kann das Verhalten einzelner Moleküle im Modell untersuchen werden. Auch die Bewegungen von Vesikeln können abgebildet werden. Liniendiagramme einzelner Moleküle zeigen Konzentrationen über den gesamten Zeitraum. Das Tool bietet die Möglichkeiten, die Trajektorien zu reduzieren durch eine Filterfunktion, welche die gefilterten Daten summiert zurückgibt. Durch interaktive Elemente, einfache Bedienung und die Verfügbarkeit im Internet entspricht das Tool heutigen Standards für Visualsierungstools. Zukünftig sollte an der Darstellung von Zahlen und Einheiten gearbeitet und Moleküle mit Datenbanken crossverlinkt werden.
Revisiting the distance to radio Loops I and IV using Gaia and radio/optical polarization data
Creators: name: Panopoulou, G. V.
name: Dickinson, C.
name: Readhead, A. C. S.
name: Pearson, T. J.
name: Peel, M. W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Galactic synchrotron emission exhibits large-angular-scale features known as radio spurs and loops. Determining the physical size of these structures is important for understanding the local interstellar structure and for modeling the Galactic magnetic field. However, the distance to these structures is either under debate or entirely unknown. We revisit a classical method of finding the location of radio spurs by comparing optical polarization angles with those of synchrotron emission as a function of distance. We consider three tracers of the magnetic field: stellar polarization, polarized synchrotron radio emission, and polarized thermal dust emission. We employ archival measurements of optical starlight polarization and Gaia distances, and construct a new map of polarized synchrotron emission from WMAP and Planck data. We confirm that synchrotron, dust emission, and stellar polarization angles all show a statistically significant alignment at high Galactic latitude. We obtain distance limits to three regions towards Loop I of 112$\pm$17 pc, 135$\pm$20 pc, and $<105$ pc. Our results strongly suggest that the polarized synchrotron emission towards the North Polar Spur at $b > 30^\circ$ is local. This is consistent with the conclusions of earlier work based on stellar polarization and extinction, but in stark contrast with the Galactic center origin recently revisited on the basis of X-ray data. We also obtain a distance measurement towards part of Loop IV (180$\pm$15 pc) and find evidence that its synchrotron emission arises from chance overlap of structures located at different distances. Future optical polarization surveys will allow the expansion of this analysis to other radio spurs.
description: Accepted by ApJ, 10 figures, 24 pages
title: Znaczenie kompetencji miękkich w obszarze IT współczesnych organizacji
Creators: name: Butryn, Beata
name: Sobińska, Małgorzata
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie, 79, 35-45
The Young Star Cluster System in the Antennae: Evidence for a Turnover in the luminosity function
Creators: name: Anders, P.
name: Bissantz, N.
name: Boysen, L.
name: de Grijs, R.
name: Alvensleben, U. Fritze -- v.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The luminosity functions (LFs) of star cluster systems (i.e. the number of clusters per luminosity interval) are vital diagnostics to probe the conditions of star cluster formation. Early studies have revealed a clear dichotomy between old globular clusters and young clusters, with the former characterised by Gaussian-shaped LFs, and the latter following a power law. Recently, this view was challenged by studies of galaxy merger remnants and post-starburst galaxies. In this paper we re-evaluate the young ($\lta$ few hundreds of Myrs, with the majority $\lta$ few tens of Myrs) star cluster system in the ongoing spiral-spiral major merger system NGC 4038/39, the "Antennae" galaxies. The Antennae galaxies represent a very active and complex star-forming environment, which hampers cluster selection and photometry as well as the determination of observational completeness fractions. A main issue of concern is the large number of bright young stars contained in most earlier studies, which we carefully exclude from our cluster sample by accurately determining the source sizes. The resulting LFs are fitted both with Gaussian and with power-law distributions, taking into account both the observational completeness fractions and photometric errors, and compared using a likelihood ratio test. The likelihood ratio results are rigidly evaluated using Monte Carlo simulations. We perform a number of additional tests, e.g. with subsets of the total sample, all confirming our main result: that a Gaussian distribution fits the observed LFs of clusters in this preferentially very young cluster system significantly better than a power-law distribution, at a (statistical) error probability of less than 0.5 per cent.
description: accepted for publication in MNRAS, some references badly set due to shortcomings of MNRAS BIBTEX style, Fig.1 slightly degraded quality
คุณลักษณะบัณฑิตไทยที่พึงประสงค์ในบริบทอาเซียน
Creators: name: จันทนา ทองประยูร
Publisher: name: สาขาวิชานิเทศศาสตร์ มหาวิทยาลัยสุโขทัยธรรมาธิราช
Year: 2558
Subjects: คุณลักษณะที่พึงประสงค์,บัณฑิตไทย,บริบทอาเซียน

description: 1, 3, วารสารอิเล็กทรอนิกส์การเรียนรู้ทางไกลเชิงนวัตกรรม
title: Gen-Y Urban entrepreneurship: a strategic perspective from the post-economic transition – the example of Poland
Creators: name: Fazlagić, Jan
name: Szulczewska-Remi, Aleksandra
name: Dybioch, Agata
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie, 79, 47-65
Small-scale Bright Blobs Ejected from a Sunspot Light Bridge
Creators: name: Li, Fuyu
name: Chen, Yajie
name: Hou, Yijun
name: Tian, Hui
name: Bai, Xianyong
name: Song, Yongliang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Light bridges (LBs) are bright lanes that divide an umbra into multiple parts in some sunspots. Persistent oscillatory bright fronts at a temperature of $\sim$$10^5$ K are commonly observed above LBs in the 1400/1330 Å~passbands of the Interface Region Imaging Spectrograph (IRIS). Based on IRIS observations, we report small-scale bright blobs from the oscillating bright front above a light bridge. Some of these blobs reveal a clear acceleration, whereas the others do not. The average speed of these blobs projected onto the plane of sky is $71.7\pm14.7$ km s$^{-1}$, with an initial acceleration of $1.9\pm1.3$ km s$^{-2}$. These blobs normally reach a projected distance of 3--7 Mm from their origin sites. From the transition region images we find an average projected area of $0.57\pm0.37$ Mm$^{2}$ for the blobs. The blobs were also detected in multi-passbands of the Solar Dynamics Observatory, but not in the H$α$ images. These blobs are likely to be plasma ejections, and we investigate their kinematics and energetics. Through emission measure analyses, the typical temperature and electron density of these blobs are found to be around $10^{5.47}$ K and $10^{9.7}$ cm$^{-3}$, respectively. The estimated kinetic and thermal energies are on the order of $10^{22.8}$ erg and $10^{23.3}$ erg, respectively. These small-scale blobs appear to show three different types of formation process. They are possibly triggered by induced reconnection or release of enhanced magnetic tension due to interaction of adjacent shocks, local magnetic reconnection between emerging magnetic bipoles on the light bridge and surrounding unipolar umbral fields, and plasma acceleration or instability caused by upward shocks, respectively.
Design and test of a real-time voice communication system for power line communication channels
Creators: name: Dorbolo, Rick G.
Publisher: name: University of British Columbia
Year: 2009

description: Intrabuilding electric power distribution lines provide easy access and universal coverage for digital speech communications. However, power line communication channels exhibit unpredictable and variable levels of signal attenuation and noise. To enable effective communication requires appropriate forward error correction of the encoded speech. This thesis describes the design, implementation and testing of synchronization, voice compression and forward error correction algorithms required to achieve a robust real-time communication link across power line channels. Communication was connection oriented and synchronous with a selectable baud rate of 9600 bps or 19200 bps. Synchronization (delineation) was accomplished using a seven bit synchronization marker placed between frames of encoded speech. The encoded speech data was generated using the U.S. digital cellular standard VSELP 7950 bps voice encoder. Error detection and correction bits were added to the speech data to produce aggregate data rates of approximately 9600 and 19200 bps. Error detection of the perceptually significant bits was provided through the use of a seven bit CRC in the 9600 bps encoded speech. The 19200 bps scheme employed an error detection/correction scheme where the amount of protection was based on the perceptual significance of each parameter. The synchronization algorithm was implemented in hardware and tested. Synchronization was maintained at bit-error rates (BERs) greater than 0.1. Subjective testing of the synchronization algorithms under random noise indicated that the 9600 and 19200 bps coding schemes were usable with channel BERs up to approximately 7x10⁻³ and 2x10⁻², respectively. Tests performed on actual power line communication channels indicated approximately equal performance using either the 9600 or 19200 bps coding scheme, due to the comparatively higher BER of the 19200 bps channel.
Including diverse leys in arable rotations
Creators: name: Bliss, Katie
name: Measures, Mark
Publisher: name: Zenodo
Year: 2022
Subjects: DiverIMPACTSPA
Rotation
Organic
Cropping system
Ecosystem services

description: Problem Leguminous leys are a cornerstone of organic arable systems to support soil quality and fertility, and weed, pest and disease management. However, a typical ley of one or two legume and grass species can fail to deliver expected services under unfavourable conditions. Good establishment, weed suppression potential and controlling the quantity and timing of nitrogen (N) release can be especially challenging. Solution Different legume species have different growth characteristics and nutrient use profiles. A number of on-farm and field trials conducted in the UK have evaluated the role of functionally species-rich leys in arable rotations.
Note on "Collective Excitations of a Degenerate Gas at the BEC-BCS Crossover", Phys. Rev. Lett. 92, 203201 (2004)
Creators: name: Altmeyer, A.
name: Riedl, S.
name: Kohstall, C.
name: Wright, M. J.
name: Denschlag, J. Hecker
name: Grimm, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a reinterpretation of our previous results on the radial compression mode of a degenerate quantum gas in the BEC-BCS crossover in [1]. We show that our former data are consistent with other experimental and theoretical work, when the ellipticity of the optical trapping potential in [1] is properly taken into account.
description: 2 pages, 1 figure, minor changes in v2
Additional file 3 of Perceived extrinsic barriers hinder community detection and management of mild cognitive impairment: a cross-sectional study of general practitioners in Shanghai, China
Creators: name: Lu, Yuan
name: Liu, Chaojie
name: Fawkes, Sally
name: Wang, Zhaoxin
name: Yu, Dehua
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 3: Table S3. Indirect effects of knowledge on intended practice.
A phylogenomic perspective on Sparidae (Teleostei: Spariformes) positioning within the tree of teleosts: challenges and new insights
Creators: name: Natsidis, Paschalis
Publisher: name: F1000 Research Limited
Year: 2019

description: Sparidae (Teleostei: Spariformes) are a family of fish constituted by approximately 150 species with high popularity and commercial value, such as porgies and seabreams. Although the phylogeny of this family has been under investigation multiple times, its position among other teleost groups remains ambiguous. Most studies have used a single or few genes to decipher the phylogenetic relationships of sparids. Here, a phylogenomic attempt to resolve the position of the family is made using five recently available Sparidae gene sets and 26 available fish proteomes from species with a sequenced genome, to ensure higher quality of the predicted genes. A thorough phylogenomic analysis suggests Tetraodontiformes (puffer fish, sunfish) as the closest relative to sparids than all other groups used. This contrasts the findings of a previous phylogenomic analysis that proposed the yellow croaker and the European seabass as closest taxa of sparids. By analytically comparing the methodologies applied in both cases, I show that this discordance is not due to different orthology assignment algorithms; on the contrary, I prove that it is caused by the increased taxon sampling of the present study, outlining the great importance of this aspect in phylogenomic analyses in general.
Metastable strings and dumbbells in supersymmetric hybrid inflation
Creators: name: Buchmuller, Wilfried
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2021

description: We study symmetry breaking and topological defects in a supersymmetric model with gauge group $\text{U}(2)$, which can be identified with the right-handed part $\text{SU}(2)_R \times \text{U}(1)_{B-L}$ of an extended electroweak symmetry of the Standard Model. The model has two phases of hybrid inflation terminated by tachyonic preheating where either monopoles and strings or, alternatively, dumbbells are formed. In the first case a stochastic gravitational wave background is predicted in the LIGO-Virgo band, possibly extending to the LISA frequency band and to nanohertz frequencies, which is generated by a metastable cosmic string network. In the second case no topological defects survive inflation and no stochastic gravitational wave background is produced.
Aspects of D-brane Dynamics in Supergravity Backgrounds with Fluxes, Kappa-symmetry and Equations of Motion. Part IIB
Creators: name: Bandos, Igor
name: Sorokin, Dmitri
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive and carry out a detailed analysis of the equations of motion of the type IIB D branes in generic supergravity backgrounds with fluxes making account of the worldvolume Born-Infeld gauge field and putting a special emphasis on the structure of the Dirac equation for Dp brane fermionic modes. We present an explicit form of the worldvolume field equations for each of the Dp branes (p=1,3,5,7,9) in the cases in which the Neveu-Schwarz flux and the Ramond-Ramond p-form flux along the Dp-brane worldvolume are zero and the supergravity backgrounds do not necessarily induce the worldvolume Born-Infeld flux. We then give several examples of D3, D5 and D7 brane configurations in which the worldvolume Born-Infeld flux is intrinsically non-zero and therefore must be taken into account in studying problems where such branes are involved. The examples include D3 and D5 brane instantons carrying (self-dual) worldvolume gauge fields in warped compactification backgrounds.
description: LaTeX 55+1 pages, v2: typos corrected, references added; v3: more typos corrected, footnote added
Extreme value theory and the St. Petersburg paradox in the failure statistics of wires
Creators: name: Taloni, Alessandro
name: Zapperi, Stefano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The fracture stress of materials typically depends on the sample size and is traditionally explained in terms of extreme value statistics. A recent work reported results on the carrying capacity of long polyamide and polyester wires and interpret the results in terms of a probabilistic argument known as the St. Petersburg paradox. Here, we show that the same results can be better explained in terms of extreme value statistics. We also discuss the relevance of rate dependent effects.