cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Mössbauer Spectroscopic and XRD Studies of two eta-Fe2Al5 Intermetallics
Creators: name: Dubiel, Stanisław M.
name: Gondek, Łukasz
name: Zienert, Tilo
name: Żukrowski, Jan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Two intermetallic FeAl compounds with Al content of 70.68 and 72.17 at.pct were studied using Mössbauer spectroscopy (5 to 296 K) and X-ray diffraction (15 to 300 K). The compounds were found to crystallize in the orthorhombic Cmcm space group (eta-phase). The collected data revealed that dynamics of the Fe atoms (harmonic in entire temperature range) is significantly different that Al atoms. For the latter strong anharmonicity was evidenced. Moreover, it was found that partial filling of the different Al sites leads to occurrence of low and high symmetry coordination of Fe atoms, which was reflected in occurrence of two distinct doublets in Mössbauer spectra. All spectral parameters of the doublets as well as the Debye temperature, force constant, kinetic and potential energies of vibrations were determined. Those results revealed significant differences between both alloys, likely originating from approaching the stability boundary of the eta-phase for Fe-Al 72.17 at.pct alloy.
description: 20 pages, 11 figures, 19 references
Από το κίνημα του 1909 στις εκλογές του 1910: Πολιτικές Εξελίξεις:
Creators: name: Μάνου-Παπαδοπούλου, Κυπριανή Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Γουδί
Στρατός
Πολιτική
Goudi
Military
Politics

description: Σκοπός της διατριβής ήταν η μελέτη των πολιτικών εξελίξεων στο διάστημα από το κίνημα του 1909 ως τις εκλογές του 1910. Εξετάστηκαν οι συνθήκες δημιουργίας του Στρατιωτικού Συνδέσμου και της εκδήλωσης του κινήματος και παρουσιάστηκαν οι νόμοι που προωθήθηκαν, σε συνεργασία με την κυβέρνηση του Κυριακούλη Μαυρομιχάλη αρχικά και του Στέφανου Δραγούμη στη συνέχεια. Επίσης αναλύθηκε κατά πόσο οι νόμοι αυτοί ανταποκρίνονταν στους στόχους που ο Στρατιωτικός Σύνδεσμος διακήρυξε κατά την ημέρα της εκδήλωσης του κινήματος, όπως και οι λόγοι που τον οδήγησαν σε αδιέξοδο και αποχώρηση από την πολιτική σκηνή. Τέλος εξετάστηκε η θέση του κινήματος στην ιστορία και στη συλλογική μνήμη.
description: The aim of the present thesis was the study of the political developments in the period between the 1909 coup d’ etat and the elections of 1910. We examined the conditions in which the Military League was formed and the demonstration of the movement. Furthermore we examined the laws which were promoted in collaboration with the government of Kiriakoulis Mauromixalis initially, and with the one of Stephanos Dragoumis later on. In addition, we have analysed the extent to which these laws responded to the aims the Military League, announced on the day of the demonstration of the movement, as well as the reasons the Military League was led to a dead end and was forced to abandon the political scene. Finally, we examined the importance of the movement in history and its impact on the people’s mind.
The birth properties of Galactic millisecond radio pulsars
Creators: name: Ferrario, Lilia
name: Wickramasinghe, Dayal
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We model the population characteristics of the sample of millisecond pulsars within a distance of 1.5kpc.We find that for a braking index n=3, the birth magnetic field distribution of the neutron stars as they switch on as radio MSPs can be represented by a Gaussian with mean $\log B(G)= 8.1$ and $σ_{\log B}=0.4$ and their birth spin period by a Gaussian with mean $P_0=4$ ms and $σ_{P_0}=1.3$ ms. Our study, which takes into consideration acceleration effects on the observed spin-down rate, shows that most MSPs are born with periods that are close to the currently observed values and with average characteristic ages typically larger by a factor 1.5 compared to the true age. The Galactic birth rate of the MSPs is deduced to be $\gsimeq 3.2 \times 10^{-6}$ yr$^{-1}$ near the upper end of previous estimates and larger than the semi-empirical birth rate $\sim 10^{-7}$ yr$^{-1}$ of the LMXBs. The mean birth spin period deduced by us for the radio MSPs is a factor 2 higher than the mean spin period observed for the accretion and nuclear powered X-ray pulsars, although this discrepancy can be resolved if we use a braking index $n=5$, the value appropriate to spin down caused by angular momentum losses by gravitational radiation or magnetic multipolar radiation. We discuss the arguments for and against the hypothesis that accretion induced collapse may constitute the main route to the formation of the MSPs, pointing out that on the AIC scenario the low magnetic fields of the MSPs may simply reflect the field distribution in isolated magnetic white dwarfs which has recently been shown to be bi-modal with a dominant component that is likely to peak at fields below $10^3$ G which would scale to neutron star fields below $10^9$ G.
description: 8 pages, 2 figures, accepted for publication in the MNRAS
An In-Depth Exploration of the Effect of 2D/3D Views and Controller Types on First Person Shooter Games in Virtual Reality
Creators: name: Monteiro, Diego
name: Liang, Hai-Ning
name: Wang, Jialin
name: Chen, Hao
name: Baghaei, Nilufar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: The amount of interest in Virtual Reality (VR) research has significantly increased over the past few years, both in academia and industry. The release of commercial VR Head-Mounted Displays (HMDs) has been a major contributing factor. However, there is still much to be learned, especially how views and input techniques, as well as their interaction, affect the VR experience. There is little work done on First-Person Shooter (FPS) games in VR, and those few studies have focused on a single aspect of VR FPS. They either focused on the view, e.g., comparing VR to a typical 2D display or on the controller types. To the best of our knowledge, there are no studies investigating variations of 2D/3D views in HMDs, controller types, and their interactions. As such, it is challenging to distinguish findings related to the controller type from those related to the view. If a study does not control for the input method and finds that 2D displays lead to higher performance than VR, we cannot generalize the results because of the confounding variables. To understand their interaction, we propose to analyze in more depth, whether it is the view (2D vs. 3D) or the way it is controlled that gives the platforms their respective advantages. To study the effects of the 2D/3D views, we created a 2D visual technique, PlaneFrame, that was applied inside the VR headset. Our results show that the controller type can have a significant positive impact on performance, immersion, and simulator sickness when associated with a 2D view. They further our understanding of the interactions that controllers and views have and demonstrate that comparisons are highly dependent on how both factors go together. Further, through a series of three experiments, we developed a technique that can lead to a substantial performance, a good level of immersion, and can minimize the level of simulator sickness.
description: 13 pages
A non-linear Renewal Theorem with stationary and slowly changing perturbations
Creators: name: Kim, Dong-Yun
name: Woodroofe, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 60K05 (Primary)

description: Non-linear renewal theory is extended to include random walks perturbed by both a slowly changing sequence and a stationary one. Main results include a version of the Key Renewal Theorem, a derivation of the limiting distribution of the excess over a boundary, and an expansion for the expected first passage time. The formulation is motivated by problems in sequential analysis with staggered entry, where subjects enter a study at random times.
description: Published at http://dx.doi.org/10.1214/074921706000000680 in the IMS Lecture Notes--Monograph Series (http://www.imstat.org/publications/lecnotes.htm) by the Institute of Mathematical Statistics (http://www.imstat.org)
Slow manifolds in recurrent networks encode working memory efficiently and robustly
Creators: name: Ghazizadeh, Elham
name: Ching, ShiNung
Publisher: name: arXiv
Year: 2021
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: Working memory is a cognitive function involving the storage and manipulation of latent information over brief intervals of time, thus making it crucial for context-dependent computation. Here, we use a top-down modeling approach to examine network-level mechanisms of working memory, an enigmatic issue and central topic of study in neuroscience and machine intelligence. We train thousands of recurrent neural networks on a working memory task and then perform dynamical systems analysis on the ensuing optimized networks, wherein we find that four distinct dynamical mechanisms can emerge. In particular, we show the prevalence of a mechanism in which memories are encoded along slow stable manifolds in the network state space, leading to a phasic neuronal activation profile during memory periods. In contrast to mechanisms in which memories are directly encoded at stable attractors, these networks naturally forget stimuli over time. Despite this seeming functional disadvantage, they are more efficient in terms of how they leverage their attractor landscape and paradoxically, are considerably more robust to noise. Our results provide new dynamical hypotheses regarding how working memory function is encoded in both natural and artificial neural networks.
Ενώσεις συναρμογής του μονοσθενούς χαλκού με 3- και 4- υποκατεστημένες φαινύλ-[1-πυριδιν-2-υλ-μεθυλιδενε)αμίνες. Ετεροληπτικές ενώσεις με τριφαινυλοφωσφίνη:
Creators: name: Τζημόπουλος, Δημήτριος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Ενώσεις του χαλκού
Α-διιμίνες
Σύμπλοκα τριφαινυλοφωσφίνης
Copper complexes
A-diimines
Triphenylphosphine complexes

description: Στη παρούσα διπλωματική εργασία συντέθηκαν και μελετήθηκαν ενώσεις συναρμογής του μονοσθενούς χαλκού με τριφαινυλοφωσφίνη και α-διιμίνες. Οι διιμίνες αυτές είναι – m- και p- υποκατεστημένες πυριδινυλιμίνες με υποκαταστάσεις που καλύπτουν ένα ευρύ φάσμα ηλεκτρονιακών φαινομένων και συγκεκριμένα -Cl, -CF3, -NO2 και -CN. Όλες οι ενώσεις μελετήθηκαν όσον αφορά την τη δυνατότητα των υποκαταστατών να μεταφέρουν τα ηλεκτρονικά φαινόμενα που εισάγουν, στην διιμινική περιοχή συναρμογής του χαλκού και να τροποποιούν τις διάφορες ιδιότητες που πηγάζουν από το περιβάλλον του μετάλλου. Τα οργανικά μόρια χαρακτηρίστηκαν πλήρως επειδή είναι νέες ενώσεις. Παρατηρήθηκε ότι η 3-CF3 υποκατεστημένη οργανική ένωση, τόσο στη στερεά κατάσταση όσο και σε διάλυμα εμφανίζει φθορισμό. Στα σύμπλοκα, το άτομο του χαλκού εμφανίζει μια τοπική γεωμετρία παραμορφωμένου τετραέδρου όπως άλλωστε ήταν αναμενόμενο. Δεν παρατηρήθηκε φθορισμός στα σύμπλοκα, τόσο στη στερεά κατάσταση όσο και σε διάλυμα. Σε ορισμένα σύμπλοκα παρατηρήθηκε, μέσω της επίλυσης της κρυσταλλικής δομής τους, η ύπαρξη συνεπιπεδότητας των δύο δακτυλίων της πυριδινυλμίνης. Ωστόσο το γεγονός αυτό δεν είχε ως αποτέλεσμα την ικανότητα του συμπλόκου να φθορίζει όπως είχε προταθεί για ανάλογα σύμπλοκα του Cu(I). Η απουσία εκπομπής στην περίπτωσή μας πρέπει να αναζητηθεί στην ευκαμψία του χρωμοφόρου και κατά συνέπεια την αναδιοργάνωσή του στη διεγερμένη κατάσταση από την οποία επανέρχεται στη βασική χωρίς εκπομπή ακτινοβολίας.
description: In the present diploma work there were synthesized and studied a group of monovalent copper compounds with triphenylphosphine and α-diimines. These diimines are m- and p- substituted pyridinylimines with substituents that span a wide range of electronic effects, being -Cl, -CF3, -NO2 and -CN. The compounds were studied in order to detect whether and to what extent the substituents can transfer their electronic phenomena to the diimine site and alter the properties of the coordination sphere. The organic ligands were characterized spectroscopically since they are new compounds. It was observed that the 3-CF3 ligand reveals emission in the form of fluorescence both in the solid state and in solution. The coordination environment of Cu(I) is distorted tetrahedral as it was expected. In none of the complexes there was observed fluorescence either in solution or in the solid state, although for some of them crystallographic determination revealed a coplanarity of the pyridinylimine aromatic rings. This coplanarity has been considered as a prerequisite for the emission from analogous chromophores. The absence of emission must be attributed to the flexible chromophore which undergoes reorganization at the excited state and relaxes through non-radiative processes.
Vortex Chain States in a Ferromagnet/Superconductor Bilayer
Creators: name: Erdin, Serkan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The discrete vortex lattices in a ferromagnet/superconductor bilayer are studied when the ferromagnet has periodic stripe domains with an out-of-plane magnetization. The vortices are assumed to be situated periodically on chains in the stripe domains. Only up to two vortex chains per domain configurations are considered. When the domain period is fixed, the threshold magnetization is calculated at which the transition from the Meissner state to the mixed state occurs. When the domain period is not fixed, the equilibrium domain size and vortex positions are calculated, depending on the domain's magnetization and the domain wall energy. In equilibrium, the vortices in the neighbor domains are half-way shifted, while they are next to each other in the same domain.
description: 11 Pages, 11 Figures
Performance Assessment System of Subdistrict Chiefs (Kamnan) and Village Heads (Phuyaiban): Citizen Participation and Management Perspectives
Creators: name: Achakorn Wongpreedee
name: Chindalak Vadhanasindhu
name: Sunthonchai Chopyot
Publisher: name: Graduate School of Public Administration
Year: 2015

description: 1, 13, Thai Journal of Public Administration
First-order phase transition to a nonmagnetic ground state in nonsymmorphic NbCrP
Creators: name: Kuwata, Yoshiki
name: Kotegawa, Hisashi
name: Tou, Hideki
name: Harima, Hisatomo
name: Ding, Qing-Ping
name: Takeda, Keiki
name: Hayashi, Junichi
name: Matsuoka, Eiichi
name: Sugawara, Hitoshi
name: Sakurai, Takahiro
name: Ohta, Hitoshi
name: Furukawa, Yuji
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the discovery of a first-order phase transition at around 125 K in NbCrP, which is a nonsymmorphic crystal with Pnma space group. From the resistivity, magnetic susceptibility, and nuclear magnetic resonance measurements using the crystals made by the Sn-flux method, the high-temperature (HT) phase is characterized to be metallic with a non-negligible magnetic anisotropy. The low-temperature (LT) phase is also found to be a nonmagnetic metallic state with a crystal of lower symmetry. In the LT phase, the spin susceptibility is reduced by ~30 % from that in the HT phase, suggesting that the phase transition is triggered by the electronic instability. The possible origin of the phase transition in NbCrP is discussed based on the electronic structure by comparing with those in other nonsymmorphic compounds RuP and RuAs.
description: 9 pages, 9 Postscript figures
Λαϊκιστικός λόγος και μεταναστευτικό ζήτημα: η περίπτωση της απόδοσης της ελληνικής ιθαγένειας:
Creators: name: Αλεξοπούλου, Καλλιόπη-Μυρτώ Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Λαϊκισμός
Μετανάστευση
Ιθαγένεια
Populism
Immigration
Citizenship

description: Η κατάθεση του νομοσχεδίου για την απόδοση της ελληνικής ιθαγένειας στους μετανάστες από την κυβέρνηση του ΠΑΣΟΚ αποτέλεσε το εναρκτήριο λάκτισμα για ποικίλες αντιδράσεις, οι οποίες, σε κάθε περίπτωση, ήταν έντονες. Μερίδα του πολιτικού κόσμου της χώρας τάχθηκε και επιχειρηματολόγησε υπέρ του νομοσχεδίου, στηριζόμενη στην αρχή των ατομικών δικαιωμάτων. Παράλληλα, όμως, άλλοι πολιτικοί κύκλοι, αλλά και ανεξάρτητοι κοινωνικοί παράγοντες, αναγνώρισαν στο νέο νομοσχέδιο την ύπαρξη εθνικής απειλής και με αυτήν την αφορμή συνάρθρωσαν και δόμησαν το λόγο τους με επιχειρήματα, τα οποία καταδείκνυαν αυτήν τον σοβαρό κίνδυνο για τον ελληνικό λαό. Είναι δυνατή η διαμόρφωση μιας τυπολογίας των διαφόρων αντιδράσεων στο συγκεκριμένο ζήτημα; Εντοπίζονται σε συγκεκριμένους τύπους ρηματικών συναρθρώσεων που αντιτάχθηκαν στο νομοσχέδιο, στοιχεία λαϊκιστικού λόγου; Ταυτόχρονα, είναι δυνατόν να εντοπιστούν και να επισημανθούν αυτά τα στοιχεία και στους λόγους κοινωνικών φορέων, οι οποίοι θεωρούν ότι δεν εκφράζουν πολιτική άποψη, αλλά παρόλα αυτά είναι σε θέση να διαμορφώσουν ένα ρεύμα κοινωνικής αντίδρασης; Αυτά είναι μερικά από τα κεντρικά ερωτήματα στα οποία θα επιχειρήσει να απαντήσει η προτεινόμενη διπλωματική εργασία με την βοήθεια αναλυτικών εργαλείων από την ανάλυση λόγου, τη θεωρία του λαϊκισμού, και μέσα από την συλλογή αντίστοιχου εμπειρικού υλικού από τον ημερήσιο τύπο και το διαδίκτυο κατά την επίμαχη περίοδο.
description: The deposition of the bill for granting the Greek citizenship to the immigrants from the government of PASOK, constituted the opening act of numerous reactions, which were - to say the least- intense. Part of the political world of the country argued for the bill, on the basis of the rights of the individual. However, in the same time, other political circles, as well as independent social factors, recognized the bill as the existence of a national threat and with this pretence shaped their discourse with arguments that underlined this serious danger for the Greek people. Is it possible to create a typology of the diverse reactions for this particular issue? Can we detect in the orations that opposed the bill, elements of populist discourse? In the same time, is it possible to find out and pinpoint those elements in the speeches of social factors, who believe that they don’t state a political view, even though they are capable of forming a force of social reaction? These are some of the main questions that this dissertation aims to answer with the aid of analytical tools from the discourse analysis, the populist theory and with the gathering of empirical evidence from the daily press and the internet during the disputed period.
Raman frequency shift in oxygen functionalized carbon nanotubes
Creators: name: Guo, Z. X.
name: Ding, J. W.
name: Xiao, Y.
name: Xing, D. Y.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In terms of lattice dynamics theory, we study the vibrational properties of the oxygen-functionalized single wall carbon nanotubes (O-SWCNs). Due to the C-O and O-O interactions, many degenerate phonon modes are split and even some new phonon modes are obtained, different from the bare SWCNs. A distinct Raman shift is found in both the radial breathing mode and G modes, depending not only on the tube diameter and chirality but also on oxygen coverage and adsorption configurations. With the oxygen coverage increasing, interesting, a nonmonotonic up- and down-shift is observed in G modes, which is contributed to the competition between the bond expansion and contraction, there coexisting in the functionalized carbon nanotube.
description: 4 pages, 3 figures, 1 table
"Blessed are the peacemakers" : religious pacifism and the Crimean War, 1854-1856
Creators: name: Haggert, Tracey
Publisher: name: University of British Columbia
Year: 2009

description: This thesis examines the views and achievements of the British religious pacifists agitating for peace prior to and during the Crimean War, 1854-1856. Through a careful analysis of both primary and secondary documents, this study focuses on a brief overview of the state and objectives of nineteenth century British religious pacifism at the time of the Crimean War, with a particular emphasis on the Quaker-inspired and -dominated London Peace Society. Further, the attitudes and actions of the religious pacifists prior to and during the Crimean War are juxtaposed against those in the Protestant religious community who supported the war. Finally, the importance of the British religious pacifists is assessed both in terms of their immediate impact and their effect on the long-term direction of the peace movement in the latter part of the nineteenth century. The argument forwarded in this paper is that the religious pacifists, who condemned war as incompatible with the teachings of Christ, not only persevered in the face of passionate and hostile pro-war public opinion, but also managed to survive the defection of their political allies, and at the close of the war to emerge with several components of their mandate fulfilled.
Faisceaux pervers des cycles évanescents des variétés de Drinfeld et groupes de cohomologie du modèle de Deligne-Carayol
Creators: name: Boyer, Pascal
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 14G22, 14G35, 11G09, 11G35, 11R39, 14L05, 11G45, 11Fxx

description: In the first half of the paper, we translate in the geometric situation of Drinfeld varieties, the principal results of the Harris and Taylor's book. We give in particular the restriction to the open strata of the vanishing cycles sheaves in terms of some local systems named Harris-Taylor's local systems which we calculate the alternated sum of the cohomology group with compact supports. In the last half of the paper, we describe the monodromy filtration of the vanishing cycles perverse sheaf and the spectral sequence associated to it. Thanks to the Berkovich-Fargues' theorem, we obtain the description of the local monodromy filtration of the Deligne-Carayol model.
description: 180 pages, 10 figures
Properties of Rotating Neutron Star in Density-dependent Relativistic Mean-field Models
Creators: name: Riahi, Rashid
name: Kalantari, Seyed Zafarollah
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Equilibrium sequences were developed for rotating NS in the relativistic mean-field interaction framework using four density-dependent equations of state for the NS matter. These sequences were constructed for the observed rotation frequencies of 25, 317, 346, 716, and 1122 Hz. The bounds of sequences were calculated in each model to determine the stability region. The gravitational mass, quadrupole moment, polar, forward and backward redshifts, and Kerr parameter were calculated. DDF and DD-ME$δ$ were unable to properly describe the low-frequency neutron stars, PSR J0348+432, PSR J1614-2230 , and PSR J0740+6620 rotate at a frequency of 25, 317, and 346 Hz, respectively. All the selected EOSs properly described the rotation of PSR J1748-244ad, and PSR J1739-285 at a frequency of 716 and 1122 Hz, respectively. The mass of these stars was in the range of [0.68, 2.14]M$_{\odot}$ and [1.67, 2.24]M$_{\odot}$, respectively. The polar, forward and backward redshifts, and the quadrupole moment were calculated in all selected rotating frequencies and the Keplerian sequence. The results were consistent with observations. Confirming the mass of $1.5^{+0.4}_{-1.0}M_{\odot}$ for EXO 0748-676, our result will be close to the observed value, and the EOSs used in this study properly describe this star. The extremum of Kerr parameter, polar, forward and backward redshifts in all models reached constant values of, a/M$\approx$ 0.7, Z$_{p}\approx$ 0.8, Z$_{eq}^{f}\approx$ -0.3 and Z$_{eq}^{b}\approx$ 2.2. These behaviors of redshifts and Kerr parameter are approximately independent of EOS. The observed behaviors must evaluate by other EOSs to find universal relations for these quantities. Also, a limit value was found for each of these parameters. In this case where these parameters are greater than the limit value, the star can rotate at a frequency equal to or greater than $ν$= 1122 Hz.
description: 15 pages, 10 figures, Accepted for publication in International Journal of Modern Physics D
Hyperfine interaction induced decoherence and deterministic teleportation of electrons in a quantum dot nanostructure
Creators: name: Yu, Siqing
name: Zhu, Yechao
name: Yeo, Ye
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, de Visser and Blaauboer [Phys. Rev. Lett. {\bf 96}, 246801 (2006)] proposed the most efficient deterministic teleportation protocol $\cal T$ for electron spins in a semiconductor nanostructure consisting of a single and a double quantum dot. However, it is as yet unknown if $\cal T$ can be completed before decoherence sets in. In this paper we analyze the detrimental effect of nuclear spin baths, the main source of decoherence, on $\cal T$. We show that nonclassical teleportation fidelity can be achieved with $\cal T$ provided certain conditions are met. Our study indicates that realization of quantum computation with quantum dots is indeed promising.
description: 10 pages
Assembly of a rovibrational ground state molecule in an optical tweezer
Creators: name: Cairncross, William B.
name: Zhang, Jessie T.
name: Picard, Lewis R. B.
name: Yu, Yichao
name: Wang, Kenneth
name: Ni, Kang-Kuen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We demonstrate the coherent creation of a single NaCs molecule in its rotational, vibrational, and electronic (rovibronic) ground state in an optical tweezer. Starting with a weakly bound Feshbach molecule, we locate a two-photon transition via the $|{c^3Σ,v'=26}\rangle$ excited state and drive coherent Rabi oscillations between the Feshbach state and a single hyperfine level of the NaCs rovibronic ground state $|{X^1Σ,v''=0,N''=0}\rangle$ with a binding energy of $D_0 = h \times 147038.30(2)$ GHz. We measure a lifetime of $3.4\pm1.6$ s for the rovibronic ground-state molecule, which possesses a large molecule-frame dipole moment of 4.6 Debye and occupies predominantly the motional ground state. These long-lived, fully quantum-state-controlled individual dipolar molecules provide a key resource for molecule-based quantum simulation and information processing.
Throughput Scaling Laws for Wireless Networks with Fading Channels
Creators: name: Ebrahimi, Masoud
name: Maddah-Ali, Mohammad
name: Khandani, Amir
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A network of $n$ wireless communication links is considered. Fading is assumed to be the dominant factor affecting the strength of the channels between nodes. The objective is to analyze the achievable throughput of the network when power allocation is allowed. By proposing a decentralized on-off power allocation strategy, a lower bound on the achievable throughput is obtained for a general fading model. In particular, under Rayleigh fading conditions the achieved sum-rate is of order $\log n$, which is, by a constant factor, larger than what is obtained with a centralized scheme in the work of Gowaikar et al. Similar to most of previous works on large networks, the proposed scheme assigns a vanishingly small rate for each link. However, it is shown that by allowing the sum-rate to decrease by a factor $α<1$, this scheme is capable of providing non-zero rate-per-links of order $Θ(1)$. To obtain larger non-zero rate-per-links, the proposed scheme is modified to a centralized version. It turns out that for the same number of active links the centralized scheme achieves a much larger rate-per-link. Moreover, at large values of rate-per-link, it achieves a sum-rate close to $\log n$, i.e., the maximum achieved by the decentralized scheme.
description: Submitted to IEEE ISIT 2007
Analysis of "Revaluation of the lower critical field in superconducting H_3S and LaH_10 (Nature Comm. 13, 3194, 2022)" by V. S. Minkov et al
Creators: name: Hirsch, J. E.
name: van Kampen, M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In Nat Comm. 13,3194 (2022) [1] and an "Author Correction" to it [2], Minkov et al. presented magnetization data versus applied magnetic field for H_3S and LaH_10 under pressure, argued that the data provide evidence that these materials are superconducting at high temperatures, and extracted from the reported data the behavior of lower critical fields versus temperature. In several papers [3,4,5,6] analyzing Refs. [1,2] it was shown that the published magnetization data could not have been obtained from the reported measured data through the processes described in Refs. [1,2]. Recently, Minkov et al performed a revaluation of their experimental results [7] and argued that the results derived from their new analysis are consistent with the results reported earlier [1]. In addition, they made public the underlying data [8] from which the data published in Ref. [1] were derived. In this paper we analyze those underlying data and conclude that (a) the data published in Ref. [1] are incompatible with the underlying measured data, and (b) the revaluation analysis presented in Ref. [7] does not support the conclusions drawn by the authors in Ref. [7] nor Ref. [1].
Quantum inductance and negative electrochemical capacitance at finite frequency
Creators: name: Wang, J.
name: Wang, B. G.
name: Guo, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on theoretical investigations of frequency dependent quantum capacitance. It is found that at finite frequency a quantum capacitor can be characterized by a classical RLC circuit with three parameters: a static electrochemical capacitance, a charge relaxation resistance, and a quantum inductance. The quantum inductance is proportional to the characteristic time scale of electron dynamics and due to its existence, the time dependent current can accumulate a phase delay and becomes lagging behind the applied ac voltage, leading to a negative effective capacitance.
An Unsupervised Learning Method with Convolutional Auto-Encoder for Vessel Trajectory Similarity Computation
Creators: name: Liang, Maohan
name: Liu, Ryan Wen
name: Li, Shichen
name: Xiao, Zhe
name: Liu, Xin
name: Lu, Feng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: To achieve reliable mining results for massive vessel trajectories, one of the most important challenges is how to efficiently compute the similarities between different vessel trajectories. The computation of vessel trajectory similarity has recently attracted increasing attention in the maritime data mining research community. However, traditional shape- and warping-based methods often suffer from several drawbacks such as high computational cost and sensitivity to unwanted artifacts and non-uniform sampling rates, etc. To eliminate these drawbacks, we propose an unsupervised learning method which automatically extracts low-dimensional features through a convolutional auto-encoder (CAE). In particular, we first generate the informative trajectory images by remapping the raw vessel trajectories into two-dimensional matrices while maintaining the spatio-temporal properties. Based on the massive vessel trajectories collected, the CAE can learn the low-dimensional representations of informative trajectory images in an unsupervised manner. The trajectory similarity is finally equivalent to efficiently computing the similarities between the learned low-dimensional features, which strongly correlate with the raw vessel trajectories. Comprehensive experiments on realistic data sets have demonstrated that the proposed method largely outperforms traditional trajectory similarity computation methods in terms of efficiency and effectiveness. The high-quality trajectory clustering performance could also be guaranteed according to the CAE-based trajectory similarity computation results.
description: 22 pages, 16 figures
Η ανάπτυξη του Νεο-σουφισμού στη Δύση (19ος-20ος αι.):
Creators: name: Πέλλας, Θεμιστοκλής Στάμκου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Νεο-σουφισμός
Αιώνια σοφία
Ισλαμικός μυστικισμός
New-sufism
Perennial Philosophy
Islamic mysticism

description: Ο αντικειμενικός σκοπός της εργασίας μας επικεντρώνεται στην παράθεση των σημαντικότερων και «επιδραστικότερων» ιδεών και διδασκαλιών εκπροσώπων της Perennial Philosophy, για την «οικουμενικοποίηση» του ισλαμικού μυστικισμού, ως μέρος ενός παγκόσμιου θρησκευτικού φαινομένου. Ο «νέο-Σουφισμος» ως πρακτική-θρησκευτική έννοια, αναπτύχτηκε εντός ενός νεότερου και σύγχρονου δυτικού πλαισίου, όπου επετράπη η ελεύθερη διασπορά και κοινωνία διαφορετικών θρησκευτικών ιδεών και η αγαστή συμφωνία διαφόρων παραδόσεων. Αποτέλεσε κοινωνικό παράγωγο αυτού του πολυπολιτισμικού πλαισίου και κομμάτι απαραίτητο ενός οικουμενικού και παγκόσμιου θρησκευτικού πνεύματος.
description: The objective aim of the present thesis focuses on the juxtaposition of the most major and “influential” ideas and teachings of Perennial Philosophy representatives for the “universalization” of Islamic mysticism (new-Sufism), as a part of a global religious and mystical phenomenon. New-Sufism as a practical-religious concept was developed in a modern western context, which allowed the free float of different religious, social ideas and the excellent accord of different traditions. It was a social derivative of this multicultural framework and necessary part of universal and spiritual religion thought.
Note on orbifold Chow ring of semi-projective toric Deligne-Mumford stacks
Creators: name: Jiang, Yunfeng
name: Tseng, Hsian-Hua
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We prove a formula for the orbifold Chow ring of semi-projective toric DM stacks, generalizing the orbifold Chow ring formula of projective toric DM stacks by Borisov-Chen-Smith. We also consider a special kind of semi-projective toric DM stacks, the Lawrence toric DM stacks. We prove that the orbifold Chow ring of a Lawrence toric DM stack is isomorphic to the orbifold Chow ring of its associated hypertoric DM stack studied in \cite{JT}.
description: The proof of a proposition is revised
Ιερά Μητρόπολις Γερμανίας:
Creators: name: Αυγουστάκης, Συμεών Νικόλαος Αρχιμ. Παντελεήμων
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Ιερά Μητρόπολις Γερμανίας
Οικουμενικό Πατριαρχείο
Μετανάστευση
Metropolis
Gastarbeiter
Immigration

description: Η παρούσα εργασία«Ιερά Μητρόπολις Γερμανίας» ασχολείται πρωτίστως με τη μετανάστευση των Ελλήνων προς τη Γερμανία, η οποία άρχισε το 1960, με τους λόγους που τους ανάγκασαν να μεταναστεύσουν, όπως και με την οργάνωσή τους στηχώρα υποδοχής, τονίζοντας τις πολλές δυσκολίες προσαρμογής που αντιμετώπισαν εκεί κατά τα πρώτα χρόνια.Στη συνέχεια αναλύονταιοι λόγοι που ανάγκασαν το Οικουμενικό Πατριαρχείο να ιδρύσει την Ιερά Μητρόπολη Γερμανίας, ενώ γίνεται εκτενής αναφοράγια το πούανήκε έως τότε διοικητικώς το ορθόδοξο πλήρωμα της Γερμανίας, δηλαδή για το εκκλησιαστικό καθεστώς που επικρατούσε εκείπριν από την ίδρυση της Ιεράς Μητροπόλεως Γερμανίας, όπως επίσηςγια τους τέσσερις Μητροπολίτες και τους τρεις Πατριαρχικούς Επιτρόπους που έχουν περάσει και διακονήσει στην εν λόγω Μητρόπολη.Επισημαίνονται το έργο και η δράση τους, ώστε να καταφέρει η Μητρόπολη αυτή,έχοντας ξεκινήσει από μηδενικής βάσης, να είναι η τρίτη αναγνωρισμένη Εκκλησία της Γερμανίας σήμερα.
description: The present essay titled “Holy Metropole of Germany” deals in the first place with the immigration of Greeks to Germany, which started in the early ‘60s, with the reasons for this immigration flow, as well as with their organisation in the destination land, while pointing out the tremendous adaptive difficulties they faced during their first years there. Furthermore, the reasons are analyzed why the Oecumenic Patriarchate created the Holy Metropole of Germany. Moreover, a detailed reference is made to the ecclesiastic status of the orthodox congregation in Germany until that time, which means until the creation of the Holy Metropole of Germany, and consequently to the four Metropolites (Bishops) and the three Patriarchal Vicars who have shepherded that Metropole throughout all those years. Their activity and contribution are pinpointed in detail, all of which has resulted in the recognition of the Holy Metropole of Germany that had set from a zero level, as the third Christian Church in Germany.
High-energy-resolution measurement of ultracold atom-ion collisional cross section
Creators: name: Ben-shlomi, Ruti
name: Pinkas, Meirav
name: Meir, Ziv
name: Sikorsky, Tomas
name: Katz, Or
name: Akerman, Nitzan
name: Ozeri, Roee
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The cross section of a given process fundamentally quantifies the probability for that given process to occur. In the quantum regime of low energies, the cross section can vary strongly with collision energy due to quantum effects. Here, we report on a method to directly measure the atom-ion collisional cross section in the energy range of 0.2-12 mK$\cdot$ k$_B$, by shuttling ultracold atoms trapped in an optical-lattice across a radio-frequency trapped ion. In this method, the average number of atom-ion collisions per experiment is below one such that the energy resolution is not limited by the broad (power-law) steady-state atom-ion energy distribution. Here, we estimate that the energy resolution is below 200 $μ$K$\cdot$k$_B$, limited by drifts in the ion's excess micromotion compensation and can be reduced to the 10's $μ$K$\cdot$k$_B$ regime. This resolution is one order-of-magnitude better than previous experiments measuring cold atom-ion collisional cross section energy dependence. We used our method to measure the energy dependence of the inelastic collision cross sections of a non-adiabatic Electronic-Excitation-Exchange (EEE) and Spin-Orbit Change (SOC) processes. We found that in the measured energy range, the EEE and SOC cross sections statistically agree with the classical Langevin cross section. This method allows for measuring the cross sections of various inelastic processes and opens up possibilities to search for atom-ion quantum signatures such as shape-resonances.
Walking the thin line : Ishikawa Sanshirō and Japanese anarchism
Creators: name: Schnick, Daniel William
Publisher: name: University of British Columbia
Year: 2009

description: Ishikawa Sanshirō (1876-1956) was a political dissident and social activist during Japan's rapid yet troubled transformation into modern nationhood. Ishikawa believed that one's ideal life and destiny is growth and development in self-disciplined freedom, a conviction he articulated through political and philosophical discourses that emphasized humanistic principles. This view diametrically opposed state efforts to control one's destiny and growth vis-à-vis nation-state authoritarianism, articulated through discourse that emphasized state-endorsed national ethos and conformity. The agent of Ishikawa's opposition to state practice and ideology was 'counter' practice and ideology that simultaneously tried to resist and undermine state authoritarianism. Ishikawa reconciled his 'counter' practice and ideology with state suppression and his desire to fulfill his humanistic commitment, a feat that required him to walk a thin line between the pitfalls that compromised the beliefs or ended the careers of so many of his peers. Although Ishikawa wrote prolifically all his life, his place in the historical 'web' has been largely disregarded. The task of determining Ishikawa's 'place' is thus contingent upon surveying a few select primary sources (literature from various instances in Ishikawa's career) and secondary accounts of Ishikawa's actions and beliefs. This analysis will reveal the nature of Ishikawa's 'counter' practice and ideology within its socio-political environment from 1900 to 1950. (Note: Japanese long vowels are designated as follows: ū, ō.)
Thermodynamic driving force of transient negative capacitance of ferroelectric capacitors
Creators: name: Zhang, Yuanyuan
name: Sun, Xiaoqing
name: Chai, Junshuai
name: Xu, Hao
name: Ma, Xueli
name: Xiang, Jinjuan
name: Han, Kai
name: Wang, Xiaolei
name: Wang, Wenwu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: This paper investigates the thermodynamic driving force of transient negative capacitance (NC) in the series circuit of the resistor and ferroelectric capacitor (R-FEC). We find that the widely used Landau-Khalatnikov (L-K) theory, that is, the minimum of the Gibbs free energy, is inapplicable to explain the transient NC. The thermodynamic driving force of the transient NC phenomenon is the minimum of the difference between the elastic Gibbs free energy and the electric polarization work. The appearance of the transient NC phenomenon is not due to the widely accepted view that the ferroelectric polarization goes through the negative curvature region of elastic Gibbs free energy landscape (Ga). Instead, the transient NC phenomenon appears when the energy barrier of Ga disappears. The transient NC is dependent on both the intrinsic ferroelectric material parameters and extrinsic factors in the R-FEC circuit.
description: 31 pages, 7 fiures, 1 table
Η ερμηνεία των αόριστων προσδιοριστών "ένας" και "κάποιος" στην Ελληνική ως Γ1 και Γ2:
Creators: name: Μιχαήλ, Νεκταρία Σάββα
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Ένας, κάποιος
Αόριστος προσδιοριστής
Ελληνική γλώσσα ως μητρική και δεύτερη
One, some
Indefinite article
Greek language as maternal and second

description: Η παρούσα εργασία συμβάλλει στη σημασιολογική τυπολογία των αόριστων προσδιοριστών, παρουσιάζοντας πειραματικά στοιχεία στην ερμηνεία των αόριστων προσδιοριστών ένας και κάποιος στην Ελληνική ως Γ1 και Γ2 και συζητώντας τα συμπεράσματα που προκύπτουν από αυτά τα δεδομένα. Χρησιμοποιήθηκε ένα ερμηνευτικό ερωτηματολόγιο μέσω του οποίου μελετήθηκε κατά πόσον οι φυσικοί ομιλητές και οι μη φυσικοί ομιλητές της Ελληνικής με μητρική γλώσσα την Αγγλική, επιτρέπουν στους αόριστους προσδιοριστές ένας και κάποιος να πάρουν πεδίο πέραν των συντακτικών νησίδων, παράγοντας έτσι αναγνώσεις ευρέος και ενδιάμεσου πεδίου. Τα πειραματικά ευρήματα έδειξαν ότι τόσο οι φυσικοί ομιλητές, όσο και οι μη φυσικοί ομιλητές επιτρέπουν τις αναγνώσεις μακράς αποστάσεως, αποτέλεσμα συμβατό με τη θεωρία των Reinhart και Winter, οι οποίοι υποστηρίζουν την παραγωγή αναγνώσεων ενδιάμεσου πεδίου. Επιπλέον, τα αποτελέσματα έδειξαν ότι όσον αφορά τις αναγνώσεις στο ευρύ πεδίο με αόριστο προσδιοριστή το ένας, δεν ήταν στις πρώτες προτιμήσεις κατά την ερμηνεία κειμένου στους μη φυσικούς ομιλητές της Ελληνικής, ενώ το αντίθετο συνέβη με τους φυσικούς ομιλητές. Τα αποτελέσματα αυτά ερμηνεύονται με τη βοήθεια του φαινομένου της μεταφοράς (transfer) (Ionin 2003) των στοιχείων μιας γλώσσας Γ1 σε μια δεύτερη γλώσσα Γ2, κατά την κατάκτηση της Γ2.
description: The present thesis contributes to the semantic typology of indefinites by presenting experimental evidence on the interpretation of the indefinites ένας and κάποιος in Greek as L1 and L2 and by discussing the theoretical implications of these experimental data. One off-line interpretation experiment investigates whether native Greek speakers and non native Greek speakers with L1 English allow indefinites to scope out of syntactic islands and to take intermediate and wide scope. The experimental data show that the long-distance readings are available to both native and non native speakers. These findings are consistent with the proposal by Reinhart and Winter, which support the intermediate scope readings. Furthermore, with respect to the readings of indefinite ένας in the wide scope condition, the experimental findings show that indefinite ένας was not easily accommodated with the wide scope by the non native speakers, while the opposite occurred by the native speakers. These results seem to be consistent with the transfer approach (Ionin 2003), where, during the acquisition of L2, the properties of the native language L1 transfer onto the second language.
Low X-ray Efficiency of a Young High-B Pulsar PSR J1208-6238 Observed with Chandra
Creators: name: Bamba, Aya
name: Watanabe, Eri
name: Mori, Koji
name: Shibata, Shinpei
name: Terada, Yukikatsu
name: Sano, Hidetoshi
name: Filipovic, Miroslav D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: High magnetic field (high-B) pulsars are key sources to bridge magnetars and conventional rotation powered pulsars, and thus to understand the origin of magnetar activities. We have estimated a tight upper-limit on the X-ray flux of one of the youngest high-B pulsars PSR J1208-6238 for the first time; a Chandra 10 ks observation shows no significant source. Depending on the emission models, the 3sigma upper-limit on the intrinsic 0.5-7 keV flux to (2.2-10.0)e-14 erg/s/cm2.
description: 7 pages, 6 figures, Ap&SS, accepted
Analysis of Evolutionary Program Synthesis for Card Games
Creators: name: Saha, Rohan
name: Pirlot, Cassidy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: In this report, we inspect the application of an evolutionary approach to the game of Rack'O, which is a card game revolving around the notion of decision making. We first apply the evolutionary technique for obtaining a set of rules over many generations and then compare them with a script written by a human player. A high-level domain-specific language is used that deter-mines which the sets of rules are synthesized. We report the results by providing a comprehensive analysis of the set of rules and their implications.
Studies on Magnetic-field induced first-order transitions
Creators: name: Chaddah, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We shall discuss magnetization and transport measurements in materials exhibiting a broad first-order transition. The phase transitions would be caused by varying magnetic field as well as by varying temperature, and we concentrate on ferromagnetic to antiferromagnetic transitions in magnetic materials. We distinguish between metastable supercooled phases and metastable glassy phase.
description: 50th Golden Jubilee Solid State Physics Symposium during Dec.5-9 (2005) in Mumbai - manuscript of Invited talk