cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
In-medium kinetic theory of $D$ mesons and heavy-flavor transport coefficients
Creators: name: Torres-Rincon, Juan M.
name: Montaña, Glòria
name: Ramos, Àngels
name: Tolos, Laura
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We extend the kinetic theory of $D$ mesons to accommodate thermal and off-shell effects due to the medium modification of the heavy-meson spectral functions. From the Kadanoff-Baym approach we derive the off-shell Fokker-Planck equation which encodes the heavy-flavor transport coefficients. We analyze the thermal width (damping rate) of $D$ mesons due to their scattering off light mesons, focusing on new in-medium effects: off-shell corrections, inelastic channels, and the contribution of the Landau cut. We obtain that the latter effect (absent for vacuum scattering amplitudes) brings sizable corrections at moderate temperatures. We discuss how the heavy-flavor transport coefficients, like the drag and diffusion coefficients, are modified in matter. We find that the $D$-meson spatial diffusion coefficient matches smoothly to the latest results of lattice-QCD calculations and Bayesian analyses at higher temperatures.
description: 47 pages, 14 figures. Theoretical foundations largely abridged (we refer to v1 for details). Extended discussions and added new figures. Results unmodified. Version published by Physical Review C journal
title: Benefit-sharing in the Brazilian Amazon: the challenges to achieving equity and fairness
Creators: name: Ramos, Roberta Peixoto
Publisher: name: London School of Economics and Political Science (LSE)
Year: 2019

description: As a signatory to the Convention on Biological Diversity and as one of the most socio-biodiverse countries in the world, Brazil has, since 2001, legally regulated access of genetic resources and traditional knowledge in the country. Despite that, there has been very little success in achieving fair and equitable benefit-sharing agreements, especially where indigenous people and traditional communities are involved in the negotiation. This suggests a grossly unjust power imbalance between users and providers of biodiversity and traditional knowledge. This research looks into the challenges of achieving fairness and equity in access and benefit sharing (ABS) through the lens of a rights-based approach to conservation, where the right to participation, the right to prior informed consent, the right to land security and the right to culture are shown to be elements that can influence the fairness and justice of an ABS agreement. To illustrate this, a case study of an ABS contract signed between the Oriximiná ‘Quilombola’ (1) communities and a Brazilian university for access to their biodiversity and traditional knowledge for pharmaceutical research is analysed. The experience of this community reveals that justice and equity cannot be achieved solely according to the content of a contract, as it is generally expected. There are aspects of the negotiation process such as the community’s access to information and respect for customary norms that need to be taken into account, which discussion of the rights-based approach brings to light. The thesis evolves to a discussion of the Bailique Community Protocol, the first of its kind in Brazil, which is an innovative tool for natural resource management and community empowerment. This thesis shows how a Community Protocol can be an instrument that addresses the many challenges identified in the Oriximiná case study, thus having the potential to be used as a mechanism to support communities in achieving a fair and equitable benefit-sharing in cases of access to their traditional knowledge. By discussing and constructing their community protocols, communities are able to define their customary norms, their decision-making processes and their development priorities, enhancing the possibility of a more equal and informed dialogue with external actors interested in accessing their biodiversity and knowledge. (1) Quilombolas are a self-defined ethnic group with specific territorial relations and an identification of black ancestry that is related to resistance to their historical oppression
Σύγκριση δύο δεικτών αιτιότητας Granger που συνδυάζουν μεικτή εμβύθιση και μέτρα πληροφορίας.:
Creators: name: Λάιου, Πετρούλα Ζήση
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Granger αιτιότητα
εμβύθιση
αμοιβαία πληροφορία
Granger causality
embedding
mutual information

description: Σκοπός της Ανάλυσης Χρονοσειρών δεν είναι μόνο η πρόβλεψη, αλλά και η εύρεση αλληλεπιδράσεων μεταξύ των μελετώμενων χρονοσειρών. Συγκεκριμένα μας ενδιαφέρει να εξετάσουμε αν υπάρχει μεταξύ τους, σχέση αιτίου και αποτελέσματος ή σχέση εξάρτησης και συνοχής. Στην παρούσα διπλωματική εργασία συγκρίνονται δύο κριτήρια αιτιότητας κατά Granger τα οποία χρησιμοποιούν την αμοιβαία πληροφορία και την εντροπία. Βασίζονται στην ανακατασκευή του χώρου κατάστασης και στη μεικτή εμβύθιση. Η επίδοσή τους αξιολογήθηκε μέσω ενός συνόλου προσομοιώσεων που έγιναν σε γνωστά συζευγμένα συστήματα. Τέλος εφαρμόστηκαν σε δεδομένα φυσιολογίας και μελετήθηκε η αλληλεπίδραση καρδιακού και αναπνευστικού ρυθμού, καθώς και η αλληλεπίδραση καθενός ρυθμού με τη συγκέντρωση οξυγόνου στο αίμα.
description: The goal of Time Series Analysis is not only the prediction but also finding the interactions between the investigated time series. Specifically, we are interested to investigate if there exists between them a relation of cause and effect or a relation of dependence and coherence. At this master thesis, two Granger causality measures are compared which use mutual information and entropy. They are based on the state space reconstruction and the mixed embedding. They were evaluated through simulations in known coupled systems. Finally, they were implemented in physiological data and was investigated the interaction between the heart rate and the breath rate, and the interaction each of these rates with the blood oxygen concentration.
Continuity of Monge-Amp{è}re Potentials in Big Cohomology Classes
Creators: name: Dang, Quang-Tuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: Extending DiNezza-Lu's approach to the setting of big cohomology classes, we prove that solutions of degenerate complex Monge-Amp{è}re equations on compact K{ä}hler manifolds are continuous on a Zariski open set. This allows us to show that singular K{ä}hler-Einstein metrics on log canonical varieties of general type have continuous potentials on the ample locus outside of the non-klt part.
description: to appear in Int. Math. Res. Not
Παρασκευή και καταλυτικές ιδιότητες διμεταλλικών αποθεμάτων Pt και Cu,Pb,Ni σε υπόστρωμα υαλώδους άνθρακα με συνδυασμένη ηλεκτρολυτική- μη ηλεκτρολυτική απόθεση για ηλεκτροχημική οξείδωση φορμικού οξέ:
Creators: name: Κολοθά, Ελευθερία Θεόδωρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Διμεταλλικοί καταλύτες
Ηλεκτροχημική οξείδωση φορμικού οξέος
Ηλεκτροχημική οξείδωση μονοξειδίου του άνθρακα
Bimetallic catalysts
Electrochemical oxidation of formic acid
Electrochemical oxidation of carbon monoxide

description: Σκοπός της παρούσας διπλωματικής εργασίας ήταν η παρασκευή διμεταλλικών καταλυτών Pt και Cu, Pb, Ni με συνδυασμένη ηλεκτρολυτική - μη ηλεκτρολυτική (αυθόρμητη) απόθεση σε υπόστρωμα υαλώδους άνθρακα. Αρχικά εξετάστηκαν οι καταλυτικές ιδιότητες αυτών των διμεταλλικών αποθεμάτων. Στη συνέχεια, έγινε μελέτη της ηλεκτροχημικής οξείδωσης (οξειδωτικής εκρόφησης) του μονοξειδίου του άνθρακα, το οποίο αποτελεί ενδιάμεσο δηλητήριο ή προϊόν των περισσότερων δράσεων προσρόφησης και ηλεκτροχημικής οξείδωσης στις οποίες συμμετέχουν μικρά οξυγονωμένα οργανικά μόρια. Τέλος, πραγματοποιήθηκε η μελέτη της ηλεκτροχημικής συμπεριφοράς των διμεταλλικών αποθεμάτων ως προς την ηλεκτροχημική οξείδωση του φορμικού οξέος.
description: The aim of the present thesis was the preparation of bimetallic catalysts Pt and Cu, Pb, Ni by combined electrolytic- electroless (spontaneous) deposition on a glassy carbon substrate. At first, the catalytic properties of these bimetallic deposits were examined. Subsequently, a study of the electrochemical oxidation (oxidative desorption) of carbon monoxide was carried out, which is a poisonous intermediate or a product of most adsorption and electrochemical oxidation actions, in which small oxygenated organic molecules participate. Finally, a study of electrochemical behavior of these bimetallic deposits was carried out, regarding the formic acid electrochemical oxidation.
Verfassungsrechtliche Grenzen der EZB-Politik
Creators: name: Herrmann, Christoph
Publisher: name: Trier University
Year: 2016
Subjects: subject: Europäische Zentralbank
subject: Geldpolitik
subject: Verfassungsrecht
subject: European Central Bank
subject: monetary policy
subject: constitutional law

description: Eine unabhängige Zentralbank auf europäischer Ebene war immer ein besonders deutsches Petitum. Seit 2010 ist die Unzufriedenheit mit der Geldpolitik der EZB jedoch gerade in Deutschland beständig gewachsen. Mit dem OMT-Programm vom September 2012 hat die EZB aus Sicht vieler Beobachter die Grenzen zulässiger Geldpolitik überschritten. Das Bundesverfassungsgericht hatte in seiner historischen ersten Vorlage an den Gerichtshof der Europäischen Union diese Auffassung geteilt; der Gerichtshof ist ihm aber nicht gefolgt und hat im Juni 2015 das OMT-Programm für europarechtskonform erachtet. Der vorliegende Beitrag – der auf einem Vortrag vor der abschließenden Bundesverfassungsgerichtsentscheidung beruhte – ordnet die Rechtsfragen des Verfahrens europarechtlich und verfassungsrechtlich ein. Die Entscheidung des Bundesverfassungsgerichts vom 21.06.2016 wird dabei punktuell noch berück sichtigt. Der Verfasser erläutert zunächst die für die Tätigkeit der EZB und ihre Aufgabe der Geldpolitik bestehenden europa- und verfassungsrechtlichen Rahmenbedingungen. Sodann stellt er die durch die Rechtsprechung des BVerfG entwickelten verfassungsrechtlichen Kontrollmaßstäbe dar, die zu einer Verschränkung der beiden Rechtsebenen führen können und eine Kontrolle der europäischen Integration durch das BVerfG ermöglichen. Schließlich widmet sich die Abhandlung dem durch die globale Finanzkrise seit den Jahren 2007/2008 und die sich hieran anschließende EURO-Staatsschuldenkrise eingetretenen Wandel der Geldpolitik insbesondere den von der EZB als Reaktion auf die anhaltende Krise eingesetzten „unconventional monetary policy measures“ und den hierzu bisher anhängigen Verfahren auf europäischer und nationaler Ebene. Ein besonderer Fokus liegt hierbei freilich auf dem OMT-Programm.
The genomics of mimicry: gene expression throughout development provides insights into convergent and divergent phenotypes in a Müllerian mimicry system
Creators: name: Stuckert, Adam Michael Murray
name: Chouteau, Mathieu
name: McClure, Melanie
name: LaPolice, Troy M
name: Linderoth, Tyler
name: Nielsen, Rasmus
name: Summers, Kyle
name: MacManes, Matthew D
Publisher: name: Zenodo
Year: 2021

description: Transcript evidence from various Ranitomeya imitator populations and tissue types. These were used to annotate the R. imitator genome assembly.
title: A city yet to come a story of Arab Jerusalem 1948–1967
Creators: name: Naamneh, Haneen
Publisher: name: London School of Economics and Political Science (LSE)
Year: 2022

description: This thesis introduces a historical documentation of Arab Jerusalem between 1948 and 1967. Following the Nakba in 1948, mandate Jerusalem was partitioned into an Arab city and a Jewish city. The western neighbourhoods of Jerusalem were occupied by Israel, while the Old City and the eastern neighbourhoods outside the walls were annexed to Jordan. These parts became known as Arab Jerusalem, a polity that was shaped by the Palestinian residents, the municipality and other social institutions, as well as the Jordanian government. The thesis documents the history of the (re)making of Arab Jerusalem after the Nakba, including its urban revival and development. This historical documentation sheds light on dimensions of communal dynamics and urban revival after 1948, which are not thoroughly documented in Palestinian narratives on the Nakba. The thesis illuminates the ways in which Arab Jerusalem represented a state of in-betweenness during the first two decades after the Nakba, as a partitioned city of refugees located at the border with its lost homeland, while it sought at the same time to revive and become a productive space for its residents. The historical documentation introduced in the thesis particularly engages with the struggle and efforts of the municipality under Jordanian rule, in light of the municipality’s loss of the town hall and resources in the Israeli occupied part of the city in 1948. The thesis considers the history of the Jerusalem municipality from the late mandate period (1945–1948) through Jordanian rule and ends with the first few weeks following the Israeli occupation in 1967, when the Arab municipal council was dissolved. For this documentation, the thesis relies primarily on the records of the Arab municipality, which are located at the Jerusalem Municipality Archive. In addition, it deploys historical materials collected from archives and libraries in Palestine, Israel and the United Kingdom.
Quantum phase transitions of polar molecules in bilayer systems
Creators: name: Wang, Daw-Wei
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate the quantum phase transitions of bosonic polar molecules in a two-dimensional double layer system. We show that an interlayer bound state of dipoles (dimers) can be formed when the dipole strength is above a critical value, leading to a zero-energy resonance in the interlayer s-wave scattering channel. In the positive detuning side of the resonance, the strong repulsive interlayer pseudopotential can drive the system into a maximally entangled state, where the wave function is a superposition of two states that have all molecules in one layer and none in the other. We discuss how the zero-energy resonance, dimer states, and the maximally entangled state can be measured in time-of-flight experiments.
description: Minor corrections
Μελέτη συστημάτων Imaging Atmospheric Cherenkov Telescopes για κοσμικές ακτίνες γάμμα υψηλών ενεργειών 50GeV-100TeV:
Creators: name: Μάζνας, Ιωάννης Θωμά
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: κοσμική
τηλεσκόπιo
Cherenkov
cosmic
telescope

description: Το θέμα της εργασίας είναι η μελέτη της συμπεριφοράς των τηλεσκοπίων Cherenkov στις γ-κοσμικές ακτίνες στο φάσμα ενεργειών 50GeV έως 100TeV με τη χρήση των προγραμμάτων προσομοίωσης CORSIKA και SimTelArray. Πιο συγκεκριμένα μελετήθηκε η μέθοδος εύρεσης της ενέργειας και διεύθυνσης των εισερχόμενων φωτονίων από στερεοσκοπικά συστήματα τηλεσκοπίων, η απόκριση των τηλεσκοπίων στις διάφορες ενέργειες και γωνίες από το ζενίθ, τα σφάλματα που παρουσιάζονται σε αυτά και ποιοι παράγοντες τα επηρεάζουν κ.α. Οι προσομοιώσεις έγιναν με βάση τις πειραματικές διατάξεις των HESS και CTA-south.
description: The subject of this thesis is the study of the behavior of Cherenkov telescopes for gamma cosmic radiation in the energy range between 50GeV and 100TeV with the use of the simulation programs CORSIKA and SimTelArray. More specifically, it has been studied the method of finding the energy and direction of incoming photons from stereoscopic telescope systems, the response of the telescopes in the various energies and zenith angles, the errors that arise in them and what factors influence these errors, etc. The simulations were based on experimental setups of HESS and CTA-south.
Παράλληλη υλοποίηση αλγορίθμων μοριακής δυναμικής σε ετερογενείς αρχιτεκτονικές με τη χρήσης της Open Computing Language (OpenCL):
Creators: name: Πολυχρονιάδης, Κωνσταντίνος Ιπποκράτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Μοριακή
Δυναμική
GPGPU
Molecular
Dynamics

description: Το ϐασικό ϑέµα της εργασίας αυτής είναι η ανάπτυξη παράλληλων αλγοϱίθµων µοριακής δυναµικής σε ετερογενή συστήµατα, µε εφαρµογές στη ϕυσική στερεάς κατάστασης, και η συγκριτική αξιολόγηση των επιδόσεών τους σε υπολογιστικές µονάδες διαφορετικών αρχιτεκτονικών. Συγκεκριµένα, οι αλγόριθµοι χρησιµοποιήθηκαν για τη προσοµοίωση της αλλαγής ϕάσης του αργού σε κρυσταλλικό υλικό µε το δυναµικό αλληλεπίδρασης Lennard-Jones, τη διαδικασία relaxation του bulk αργύρου και τη διαδικασία σχηµατισµού cluster από άτοµα αργύρου µε το δυναµικό Sutton-Chen. Η υλοποίηση των παράλληλων αλγορίθµων πραγµατοποιήθηκε µε τη γλώσσα προγραµµατισµού OpenCL. Για τη συγκριτική αξιολόγηση των χρόνων εκτέλεσης σε διαφορετικές συσκευές CPU και GPU αναπτύχθηκαν γραµµικοί κώδικες στη γλώσσα προγραµµατισµού C.
description: The core issue of this thesis is the development of parallel algorithms of molecular dynamics in heterogeneous systems, with applications in solid state physics, and benchmarking their performance to computational units of different architectures. Specifically, the algorithms were used for the simulation of argon crystallization with Lennard-Jones interaction potential, the relaxation process of bulk silver and the cluster formation of silver atoms with the Sutton-Chen potential. The parallel algorithms implemented using OpenCL programming language. To benchmark the execution time on different CPU and GPU devices, serial codes were developed using the C programming language.
Coexistence of unlimited bipartite and genuine multipartite entanglement: Promiscuous quantum correlations arising from discrete to continuous variable systems
Creators: name: Adesso, Gerardo
name: Ericsson, Marie
name: Illuminati, Fabrizio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Mathematical Physics (math-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quantum mechanics imposes 'monogamy' constraints on the sharing of entanglement. We show that, despite these limitations, entanglement can be fully 'promiscuous', i.e. simultaneously present in unlimited two-body and many-body forms in states living in an infinite-dimensional Hilbert space. Monogamy just bounds the divergence rate of the various entanglement contributions. This is demonstrated in simple families of N-mode (N >= 4) Gaussian states of light fields or atomic ensembles, which therefore enable infinitely more freedom in the distribution of information, as opposed to systems of individual qubits. Such a finding is of importance for the quantification, understanding and potential exploitation of shared quantum correlations in continuous variable systems. We discuss how promiscuity gradually arises when considering simple families of discrete variable states, with increasing Hilbert space dimension towards the continuous variable limit. Such models are somehow analogous to Gaussian states with asymptotically diverging, but finite squeezing. In this respect, we find that non-Gaussian states (which in general are more entangled than Gaussian states), exhibit also the interesting feature that their entanglement is more shareable: in the non-Gaussian multipartite arena, unlimited promiscuity can be already achieved among three entangled parties, while this is impossible for Gaussian, even infinitely squeezed states.
description: 8 pages, 4 figures. Extended version. Added discussion about entanglement sharing and its promiscuous structure in qudits and non-Gaussian states
Transformative or abortive? : a "de-voluntaristic" analysis of the Nationalist Revolution in modern Chinese history
Creators: name: Lanyan, Chen
Publisher: name: University of British Columbia
Year: 2009

description: Interpretations of the Nationalist Revolution in modern Chinese history, especially the so-called “Nanjing decade” (1927-1937) are dominated by theoretical notions which see the state as autonomous in its relationship to society. This autonomous state model, the dissertation argues, finds its roots in the voluntaristic ideas of Talcott Parsons. Arguments based on Parsons’s ideas view the Nationalist Revolution as abortive. The dissertation rejects these views and develops an alternative perspective based on the construction of a quasi-market model of social relations. The theoretical underpinnings, in contrast to Parsons’s ideas, are termed “de-voluntaristic.” These arguments suggest that individuals participate in, and have influence on, the operation of the state. The application of a quasi-market model suggests that there was a major transformation in Chinese society during the Nationalist period. The dissertation argues that the Nationalist Government after 1927 did not continue to achieve the initial objectives of the Nationalist Revolution which, it is suggested, aimed to build a quasi-market society. The revolution, however, was not abortive. It transformed the political system. In the Imperial tradition of government, local elites protected local communities against state encroachment through their involvement in property management. After 1927, the Nanjing Government adopted a “free market” approach to political affairs, and centralized the use of military and legal power to protect property against labour and the peasants. Peasant demands for rights to the land they tilled, a key element in Sun Yat-sen’s programme for the revolution, questioned the brokerage market economy, in which local elites acted as the intermediaries of contractual partners. Workers, in the context of industrialization, and with support from Communist organizers, attempted to improve working conditions. Peasants and workers contested the power of active elites that grew in the new political order established by. the Nationalist Government. The Nationalist State abandoned the traditional role of the Chinese state to protect the well-being of society. Deeply influenced by new elites, it protected capital accumulation and safeguarded the sanctity of contracts. The Nationalist Revolution ultimately failed as it was unable to resist the invasions of the Japanese, or the alternative social formulations of the Communist movement.
Swift observations of the 2006 outburst of the recurrent nova RS Ophiuchi: I. Early X-ray emission from the shocked ejecta and red giant wind
Creators: name: Bode, M. F.
name: O'Brien, T. J.
name: Osborne, J. P.
name: Page, K. L.
name: Senziani, F.
name: Skinner, G. K.
name: Starrfield, S.
name: Ness, J-U.
name: Drake, J. J.
name: Schwarz, G.
name: Beardmore, A. P.
name: Darnley, M. J.
name: Eyres, S. P. S.
name: Evans, A.
name: Gehrels, N.
name: Goad, M. R.
name: Jean, P.
name: Krautter, J.
name: Novara, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: RS Ophiuchi began its latest outburst on 2006 February 12. Previous outbursts have indicated that high velocity ejecta interact with a pre-existing red giant wind, setting up shock systems analogous to those seen in Supernova Remnants. However, in the previous outburst in 1985, X-ray observations did not commence until 55 days after the initial explosion. Here we report on Swift observations covering the first month of the 2006 outburst with the Burst Alert (BAT) and X-ray Telescope (XRT) instruments. RS Oph was clearly detected in the BAT 14-25 keV band from t=0 to $t\sim6$ days. XRT observationsfrom 0.3-10 keV, started at 3.17 days after outburst. The rapidly evolving XRT spectra clearly show the presence of both line and continuum emission which can be fitted by thermal emission from hot gas whose characteristic temperature, overlying absorbing column, $[N_H]_W$, and resulting unabsorbed total flux decline monotonically after the first few days. Derived shock velocities are in good agreement with those found from observations at other wavelengths. Similarly, $[N_H]_W$ is in accord with that expected from the red giant wind ahead of the forward shock. We confirm the basic models of the 1985 outburst and conclude that standard Phase I remnant evolution terminated by $t\sim10$ days and the remnant then rapidly evolved to display behaviour characteristic of Phase III. Around t=26 days however, a new, luminous and highly variable soft X-ray source began to appear whose origin will be explored in a subsequent paper.
description: 20 pages, 4 figures (2 updated), accepted by ApJ
Δυναμική θερμοδυναμική ανάλυση στο χαρακτηρισμό πολυμερικών βιο-υλικών:
Creators: name: Κοσόλια, Χρυσαυγή Θεοδοσίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Θερμοδυναμική ανάλυση
πολυμερή βιο-υλικά
οδοντιατρικά πολυμερή
DMTA
polymeric bio-materials
dental polymers

description: Στην παρούσα εργασία παρουσιάζεται η Δυναμική Θερμομηχανική Ανάλυση και σειρά εργασιών που χρησιμοποιούν την μέθοδο αυτήν για τον χαρακτηρισμό πολυμερών υλικών τα οποία προορίζονται για ιατρικές και οδοντιατρικές κυρίως χρήσεις. Η DMTA είναι μια τεχνική η οποία δίνει πληθώρα απαντήσεων επί των ρεολογικών και μηχανικών ιδιοτήτων των πολυμερών υλικών για μεγάλο είδος δοκιμίων. Αναμφισβήτητα, παρέχει γρήγορα και αξιόπιστα αποτελέσματα και μάλιστα με μη καταστροφικό τρόπο για τις ρεολογικές και μηχανικές ιδιότητες των πολυμερών. Η θερμοκρασία υαλώδους μετάβασης (Tg), ο βαθμός σκλήρυνσης του πολυμερούς, ποσοτική ανάλυση του ορίου ελαστικότητας και παραμόρφωσης, το σημείο τήξης αλλά και συμπληρωματικές πληροφορίες, όπως σημαντικές μεταβάσεις που λαμβάνουν χώρα μέσα στο μόριο ως αποτέλεσμα τοπικών, μικρής κλίμακας κινήσεων μπορούν να προσδιοριστούν. Καταγράφεται με ποιον τρόπο βοηθά η μέθοδος αυτή στον χαρακτηρισμό των υλικών και πως με την μέθοδο αυτή γίνεται διερεύνηση της μεταβολής των ιδιοτήτων των υλικών με μεταβολή της σύστασής τους. Γίνεται αναφορά και χρήση της μεθόδου στον χαρακτηρισμό άλλων ειδών πολυμερών υλικών για βιομηχανικές ή άλλες χρήσεις χωρίς να είναι εξαντλητική η απαρίθμησή τους.
description: This paper presents Dynamic Thermomechanical Analysis and list of research papers, using this method for the characterization of polymeric materials intended mainly for medical and dental uses. DMTA is a technique which gives plurality responses on the rheological and mechanical properties of polymeric materials for large type specimens. Undoubtedly, it provides fast and reliable results and in a non-destructive way the rheological and mechanical properties of polymers. By the use of DMTA glass transition temperature (Tg), the degree of hardening of the polymer, a quantitative analysis of the yield strength and deformation, melting point, but also additional information such as important transitions that take place within the molecule as a result of local, small-scale movements, can be identified. Through this paper it is investigated how this method helps in the characterization of materials and how this method is monitoring how the change of the properties of materials change their formation. A non exhaustive list of how the method is used to characterize other types of polymer materials for industrial or other purposes is been presented.
A Control Function Approach to Estimate Panel Data Binary Response Model
Creators: name: Tiwari, Amaresh K
Publisher: name: arXiv
Year: 2021
Subjects: subject: Econometrics (econ.EM)
subject: FOS: Economics and business

description: We propose a new control function (CF) method to estimate a binary response model in a triangular system with multiple unobserved heterogeneities The CFs are the expected values of the heterogeneity terms in the reduced form equations conditional on the histories of the endogenous and the exogenous variables. The method requires weaker restrictions compared to CF methods with similar imposed structures. If the support of endogenous regressors is large, average partial effects are point-identified even when instruments are discrete. Bounds are provided when the support assumption is violated. An application and Monte Carlo experiments compare several alternative methods with ours.
Failed disk winds; a physical origin for the soft X-ray excess?
Creators: name: Schurch, N. J.
name: Done, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The origin of the soft X-ray excess emission observed in many type-1 AGN has been an unresolved problem in X-ray astronomy for over two decades. We develop the model proposed Gierlinski & Done (2004), which models the soft excess with heavily smeared, ionized, absorption, by including the emission that must be associated with this absorption. We show that, rather than hindering the ionized absorption model, the addition of the emission actually helps this model reproduce the soft excess. The emission fills in some of the absorption trough, while preserving the sharp rise at ~1 keV, allowing the total model to reproduce the soft excess curvature from a considerably wider range of model parameters. We demonstrate that this model is capable of reproducing even the strongest soft X-ray excesses by fitting it to the XMM-Newton EPIC PN spectrum of PG1211+143, with good results. The addition of the emission reduces the column density required to fit these data by a factor ~2 and reduces the smearing velocity from ~0.28c to ~0.2c. Gierlinski & Done suggested a tentative origin for the absorption in the innermost, accelerating, region of an accretion disk wind, and we highlight the advantages of this interpretation in comparison to accretion disk reflection models of the soft excess. Associating this material with a wind off the accretion disk results in several separate problems however, namely, the radial nature, and the massive implied mass-loss rate, of the wind. We propose an origin in a 'failed wind', where the central X-ray source is strong enough to over-ionize the wind, removing the acceleration through line absorption before the material reaches escape velocity, allowing the material to fall back to the disk at larger radii.
description: 13 Pages. 5 colour figures. Accepted for publication in MNRAS
On the Radio/X-ray Correlation in Microquasars
Creators: name: Xue, Yongquan
name: Cui, Wei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: [Context] The broadband spectral energy distribution of microquasars has proven to be a valuable tool for assessing the roles of jets and accretion flows in microquasars, as well as the coupling between the two. The coupling might manifest itself observationally in the correlated radio and X-ray variabilities of a source. Such a radio/X-ray correlation has indeed been seen in several microquasars during the low-hard state and subsequently been claimed to be universal for all. If proven, the universal correlation would have profound implications on theoretical models. However, there is already observational evidence that suggests otherwise. [Aims] In this paper, we critically examine the radio/X-ray correlation in a sample of microquasars, in the low-hard state as well as during state transitions, with a goal of testing the claimed universality of the correlation on observational grounds. [Methods] We have assembled a comprehensive data set from the simultaneous/contemporaneous radio and X-ray observations of representative microquasars. The data have allowed us to quantify the radio/X-ray correlation on a source by source basis. [Results] We find that the radio/X-ray correlation of microquasars exhibits diverse behaviors, both in the low-hard and transitional states, ranging from being very week (or none at all) to very strong. There is even a hint of spectral dependence of the correlation in some cases. [Conclusions] Our results rule out the claimed universality of the radio/X-ray correlation of microquasars, even for the low-hard state. On the other hand, we do find that the radio and X-ray variabilities are, to varying degrees, correlated in most cases.
description: 6 pages, 4 figures, accepted by A&A
Surface spin dynamics of antiferromagnetically coupled frustrated triangular films
Creators: name: Meloche, E.
name: Plumer, M. L.
name: Pinciuc, C. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Results are presented for spin-wave dispersions in geometrically frustrated stacked triangular antiferromagnets with a thin film or semi-infinite geometry having either zero, easy-plane, or easy-axis anisotropy. Surface effects on the equilibrium spin configurations and excitation spectrum are investigated for the case of antiferromagnetically coupled films, serving to extend previous results on ferromagnetically coupled layers [E. Meloche et al., Phys. Rev. B 74, 094424 (2006)]. An operator equation of motion formalism is applied to systems which are quasi-one and quasi-two dimensional in character. In contrast to the case of ferromagnetically coupled films the new results show surface modes that are well separated in frequency from bulk excitations. Magnetic excitations in thin films with an even or an odd number of layers show qualitatively different behavior. These results are relevant for a wide variety of stacked triangular antiferromagnetics materials.
description: 24 pages, 9 figures
Making Sense of the Alphabet Soup of Standards: Practical Support for Managing Electronic Resources
Creators: name: Landesman, Betty
Publisher: name: Maryland Shared Open Access Repository
Year: 2015
Subjects: Information Standards
Electronic Resources Management
Library Collections

description: PowerPoint deck from presentation originally given at the ER&L (Electronic Resources & Libraries) conference in Austin, Texas, February 24, 2015.
description: Standardization of both publishing and electronic resources management practices has become increasingly important to support the work of library staff and to better serve our users.  This session reviewed three recommended practices from the National Information Standards Organization (NISO): KBART (Knowledge Bases and Related Tools); DDA (Demand Driven Acquisition of Monographs); and Transfer (when titles transfer from one publisher to another).
Μαρκοβιανή Ανάλυση Ενός Συστήματος με δύο Σταθμούς Εργασίας, έναν Ενδιάμεσο Αποθηκευτικό Χώρο, Μη-Αξιόπιστες Παράλληλες Μηχανές με Βλάβες Ποιότητας:
Creators: name: Φραγκιουδάκη, Πελαγία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Μαρκοβιανή Ανάλυση
Γραμμές Παραγωγής/ Παράλληλες- Μη Αξιόπιστες μηχανές Παραγωγής
Βλάβες Ποιότητας
Markovian Analysis/ Markov Chain Analysis
Unreliable Parallel-Machine Workstation
Quality Failures

description: Στην παρούσα διπλωματική εργασία εξετάζεται ένα σύστημα με δυο σταθμούς εργασίας και ένα ενδιάμεσο αποθηκευτικό χώρο. Κάθε σταθμός εργασίας αποτελείται από πολλαπλές παράλληλες, μη αξιόπιστες μηχανές, οι οποίες δεν είναι πανομοιότυπες και επίσης παρουσιάζουν βλάβες ποιότητας. Οι χρόνοι επεξεργασίας, βλάβης και επισκευής ακολουθούν την εκθετική κατανομή, με μη ταυτόσημες μέσες τιμές. Η ανάλυση του συστήματος που εξετάζεται γίνεται με τη χρήση της Μαρκοβιανής ανάλυσης. Πιο συγκεκριμένα, δημιουργήθηκαν οι εξισώσεις μετάβασης του συστήματος για οποιαδήποτε τιμή της χωρητικότητας n, που περιγράφουν την πιθανότητα μετάβασης του συστήματος από μία κατάσταση σε μίας άλλη, δημιουργείται ένας επαναληπτικός αλγόριθμος ο οποίος γεννά τον πίνακα μετάβασης για οποιαδήποτε τιμή της χωρητικότητας του ενδιάμεσου αποθηκευτικού χώρου. Αφότου γίνει η επίλυση των εξισώσεων μετάβασης μπορεί εύκολα να υπολογιστεί η απόδοση του συστήματος. Το μοντέλο αυτό μπορεί να χρησιμοποιηθεί και σαν δομικό στοιχείο της μεθόδου αποσύνθεσης για την επίλυση μεγάλων γραμμών παραγωγής με παράλληλες, μη αξιόπιστες μηχανές με βλάβες ποιότητας σε κάθε σταθμό εργασίας.
description: This thesis is an essential examination of a model of serial flow line with two workstations and an intermediate buffer. Each workstation consists of multiple unreliable parallel machines with quality failures. All parallel machines at each workstation are not identical and, viz., the processing times, failure times and repair times of the parallel machines at each workstation are assumed to be exponentially distributed with non-identical mean rates. The system under consideration is solved via exact Markovian Analysis. More specifically, all possible transition equations are derived and a recursive algorithm that generates the transition matrix for any value of the intermediate buffer capacity is developed. This model may be used as a decomposition block for solving larger flow lines with parallel unreliable machines with quality failures at each workstation.
Quasi-quantized Hall response in bulk InAs
Creators: name: Wawrzyńczak, Rafał
name: Galeski, Stanislaw
name: Noky, Jonathan
name: Sun, Yan
name: Felser, Claudia
name: Gooth, Johannes
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The quasi-quantized Hall effect (QQHE) is the three-dimensional (3D) counterpart of the integer quantum Hall effect (QHE),exhibited only by two-dimensional (2D) electron systems. It has recently been observed in layered materials, consisting of stacks of weakly coupled 2D platelets that are yet characterized by a 3D anisotropic Fermi surface. However, it is predicted that the quasi-quantized 3D version of the 2D QHE should occur in a much broader class of bulk materials, regardless of the underlying crystal structure. Here, we compare the observation of quasi-quantized plateau-like features in the Hall conductivity of then-type bulk semiconductor InAs with the predictions for the 3D QQHE in presence of parabolic electron bands. InAs takes form of a cubic crystal without any low-dimensional substructure. The onset of the plateau-like feature in the Hall conductivity scales with $\sqrt{2/3}k_{F}^{z}/π$ in units of the conductance quantum and is accompanied by a Shubnikov-de Haas minimum in the longitudinal resistivity, consistent wit the results of calculations. This confirms the suggestion that the 3D QQHE may be a generic effect directly observable in materials with small Fermi surfaces, placed in sufficiently strong magnetic fields
Survival of gas phase amino acids and nucleobases in space radiation conditions
Creators: name: Pilling, S.
name: Andrade, D. P. P.
name: de Castilho, R. B.
name: Cavasso-Filho, R. L.
name: Lago, A. F.
name: Coutinho, L. H.
name: de Souza, G. G. B.
name: Boechat-Roberty, H. M.
name: de Brito, A. Naves
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present experimental studies on the photoionization and photodissociation processes (photodestruction) of gaseous amino acids and nucleobases in interstellar and interplanetary radiation conditions analogs. The measurements have been undertaken at the Brazilian Synchrotron Light Laboratory (LNLS), employing vacuum ultraviolet (VUV) and soft X-ray photons. The experimental set up basically consists of a time-of-flight mass spectrometer kept under high vacuum conditions. Mass spectra were obtained using photoelectron photoion coincidence technique. We have shown that the amino acids are effectively more destroyed (up to 70-80%) by the stellar radiation than the nucleobases, mainly in the VUV. Since polycyclic aromatic hydrocarbons have the same survival capability and seem to be ubiquitous in the ISM, it is not unreasonable to predict that nucleobases could survive in the interstellar medium and/or in comets, even as a stable cation.
description: 4 pages, 2 figures. To be published in the Proceedings of the IAU-251 symposium - Organic Mater in Space, Hong Kong, China (2008)
Το νομικό σύστημα στην Ελλάδα κατά την οθωνική περίοδο:
Creators: name: Μάμαλης, Αχιλλέας Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: subject: Δίκαιο
subject: Όθωνας
subject: Ιστορία
subject: Law
subject: FOS: Law
subject: Otto
subject: History

description: Αντικείμενο της εργασίας αυτής, που σαφώς εμπίπτει στην κατηγορία της ιστορίας του Δικαίου και σε μεγάλο βαθμό βασίζεται στη μελέτη των σχετικών νομοθετημάτων, είναι το νομικό σύστημα που ίσχυσε στην Ελλάδα κατά την οθωνική περίοδο. Παρουσιάζονται, ιδίως, τα σημαντικά νομοθετικά έργα των Βαυαρών της περιόδου 1833-1835 και το Σύνταγμα του 1844 λόγω της βαρύτητας, της νομοτεχνικής τους πληρότητας και της αντοχής τους στο χρόνο. Σκοπός της εργασίας είναι να φωτίσει τη συνέχεια του δικαιικού συστήματος, που καθιερώθηκε τότε στην Ελλάδα, και τη σύνδεσή του με τη σημερινή νομική πραγματικότητα. Ακόμα αξιολογείται η ελληνικότητα του οθωνικού δικαίου με βάση τις αντιλήψεις των νομικών της εποχής αλλά και τις μεταγενέστερες θεωρήσεις του. Τέλος, αποτιμάται η συνάρτησή του προς τον επιχειρούμενο εξευρωπαϊσμό του ελληνικού κράτους. Η ανάδειξη της θεωρητικής και ιδεολογικής διαμάχης, που περιέβαλε την καθιέρωση αυτού του νομικού καθεστώτος, καθώς και του κρίσιμου ρόλου της τότε νεοσύστατης Νομικής Σχολής του Πανεπιστημίου Αθηνών εξυπηρετούν κατά κόρον τους σκοπούς της εργασίας.
description: The subject of this essay, which refers to the legal history of Greece and is mainly focused on the relevant laws, is the legal system of Greece in the period of king Otto. The fundamental laws between the years 1833 and 1835 and the Constitution of 1844 are particularly featured due to their importance, legal completeness and duration. The goal of this essay is the presentation of the relationship between that legal system and the one that till nowadays exists. Additionally the greek origins of this legal system are researched, based on the points of view of the lawyers and professors of that period and the subsequent ones. At last, it is researched its relevance to the “Europeanization” of Greece. The main aims of this research are also served by the focus on the theoretic and ideological conflicts, that touched the legal system of the period 1833-1862, as well as the role of the newly founded Faculty of Law of University in Athens.
Dichotomous Markov noise: Exact results for out-of-equilibrium systems. A review
Creators: name: Bena, Ioana
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Nonequilibrium systems driven by additive or multiplicative dichotomous Markov noise appear in a wide variety of physical and mathematical models. We review here some prototypical examples, with an emphasis on {\em analytically-solvable} situations. In particular, it has escaped attention till recently that the standard results for the long-time properties of such systems cannot be applied when unstable fixed points are crossed in the asymptotic regime. We show how calculations have to be modified to deal with these cases and present a few relevant applications -- the hypersensitive transport, the rocking ratchet, and the stochastic Stokes' drift. These results reinforce the impression that dichotomous noise can be put on a par with Gaussian white noise as far as obtaining analytical results is concerned. They convincingly illustrate the interplay between noise and nonlinearity in generating nontrivial behaviors of nonequilibrium systems and point to various practical applications.
description: Review article, 85 pages, 24 figures. Some references added. Published in the International Journal of Modern Physics B 20, pp. 2825-2888 (2006). Comments and suggestions from the readers are highly welcome
Αριθμητική προσομοίωση του ανέμου στις αγροτικές κατασκευές σε συνάρτηση με τον συντελεστή θερμικής μεταφοράς:
Creators: name: Κατσαΐτη, Χριστίνα-Ανθούλα Ευάγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: αγροτικές κατασκευές
εξισώσεις Navier-Stokes
συντελεστής θερμικής μεταφοράς
Agricultural structures,
Navier-Stokes equations,
Heat transfer coefficient

description: Στην παρούσα διπλωματική διατριβή υπολογίζεται αριθμητικά η ροή του αέρα γύρω από μία αγροτική κατασκευή και η μεταβολή του συντελεστή μεταφοράς θερμότητας hc, σε σχέση με τον αριθμό Reynolds, για τρία διαφορετικά σενάρια θερμοκρασίας. Η προσομοίωση της ροής επιτυγχάνεται με την επίλυση των εξισώσεων Navier-Stokes συνέχειας και ενέργειας, με τη μέθοδο των πεπερασμένων στοιχείων. Λαμβάνοντας υπόψη τις κατάλληλες οριακές συνθήκες, προσομοιώνεται η ροή μέσα σε αεροσήραγγα. Τα αποτελέσματα που παρουσιάζονται περιλαμβάνουν τη διαμόρφωση των γραμμών ροής, τις κατανομές των ταχυτήτων, των οριακών στοιβάδων ταχύτητας και θερμοκρασίας, τις μεταβολές της θερμοκρασίας και του συντελεστή μεταφοράς θερμότητας hc, σε σχέση με τον αριθμό Reynolds.
description: This study presents numerically the airflow over a typical agricultural structure and the ratio οf the heat transfer coefficient hc, for three different temperature scenarios. The airflow simulation is based on the solution of the Navier-Stokes equations, continuous equation and energy equation with the finite element method. Taking into account the proper boundary conditions the airflow is simulated into a wind-tunnel. The presented results include stream-lines of air flow, values of air velocity, contours of velocity and thermal boundary layers, temperature contours and the heat transfer coefficient in relation with Reynolds numbers.
Additional file 1 of Engineering the transmission efficiency of the noncyclic glyoxylate pathway for fumarate production in Escherichia coli
Creators: name: Chen, Xiulai
name: Ma, Danlei
name: Liu, Jia
name: Luo, Qiuling
name: Liu, Liming
Publisher: name: figshare
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences

description: Additional file 1: Table S1. Strains and plasmids used in this study.