cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ο ενδοαορτικός ασκός στην καρδιοχειρουργική
Creators: name: Μάρκου, Βασίλειος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ενδοαορτικός ασκός
Υποστήριξη καρδιακής λειτουργίας
Καρδιογενή καταπληξία
Intra Aortic Balloon Pump (IABP)
Cardiac support
Cardiogenic shock

description: Ο ενδοαορτικός ασκός (intra aortic balloon pump- IABP) αποτελεί μορφή εσωτερικής αντιώθησης ενώ δρα ως υποβοηθητική συσκευή κυκλοφορικής υποστήριξης. Σκοπό της παρούσας εργασίας αποτελεί η βιβλιογραφική ανασκόπηση της εφαρμογής του ενδοαορτικού ασκού στην καρδιοχειρουργική, με απώτερο σκοπό τη διερεύνηση της επίδρασης της τοποθέτησης ΙΑΒΡ στη θνητότητα και νοσηρότητα ασθενών που υποβάλλονται σε καρδιοχειρουργική επέμβαση. Η μελέτη κατέδειξε πως η τοποθέτηση του ενδοαορτικού ασκού δεν οδηγεί σε μείωση της θνητότητας στους ασθενείς που υποβάλλονται σε καρδιοχειρουργική επέμβαση αλλά ούτε και στη νοσηρότητα των ασθενών αυτών. Συγκεκριμένα, ο ενδοαορτικός ασκός δεν συνδέεται με τη εμφάνιση περισσότερων επιπλοκών συγκριτικά με τους ασθενείς που δεν τέθηκαν σε ενδοαορτικό ασκό, ενώ παράλληλα δε σημειώνεται διαφορά στη μηχανική υποστήριξη της αναπνοής ανάμεσα στις δύο αυτές ομάδες ασθενών. Παρόλο αυτά ο ενδοαορτικός ασκός χρησιμοποιείται και εφαρμόζεται στην καρδιοχειρουγική καθώς αποτελεί εύχρηστη και οικονομική μέθοδο υποστήριξης της καρδιακής λειτουργίας.
description: The Intra Aortic Balloon Pump (IABP) is one type of internal counterpulsation and mechanical hemodynamic support of heart. The aim of the present is the review of the literature regarding the use of IABP in cardiac surgery patients. More specific, we aim to examine the effect of IABP in mortality and morbidity among cardiac surgery patients. The results indicated that the IABP does not affect neither the morbidity nor the mortality in patients after cardiac surgery. Analytically, the IABP is not associated with more side effects compared to patients without IABP. Also, it was not observed any difference in mechanical ventilator between patients with IABP and without IABP. Even though, the IABP is used in cardiac surgery patients since it is a cost effective and practical method for cardiac support.
Additional file 2: of Genome-wide analysis of cotton GH3 subfamily II reveals functional divergence in fiber development, hormone response and plant architecture
Creators: name: Yu, Daoqian
name: Qanmber, Ghulam
name: Lu, Lili
name: Wang, Lingling
name: Li, Jie
name: Yang, Zhaoen
name: Liu, Zhao
name: Li, Yi
name: Chen, Quanjia
name: Mendu, Venugopal
name: Li, Fuguang
name: Yang, Zuoren
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Virology

description: Figure S1. Three NJ phylogenetic trees for identification of GH3 genes in cotton. GH3s in G. arboreum (a), G. raimondii (b) and G. hirsutum (c) are shown. All GH3s in Arabidopsis are marked by solid red circles, members of subfamily II GH3s in Arabidopsis are highlighted in lime. Gene name is located on the right side of the locus_ID. (PDF 1002â kb)
Collision Avoidance for Unmanned Aerial Vehicles in the Presence of Static and Moving Obstacles
Creators: name: Marchidan, Andrei
name: Bakolas, Efstathios
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper presents a new collision avoidance procedure for unmanned aerial vehicles in the presence of static and moving obstacles. The proposed procedure is based on a new form of local parametrized guidance vector fields, called collision avoidance vector fields, that produce smooth and intuitive maneuvers around obstacles. The maneuvers follow nominal collision-free paths which we refer to as streamlines of the collision avoidance vector fields. In the case of multiple obstacles, the proposed procedure determines a mixed vector field that blends the collision avoidance vector field of each obstacle and assumes its form whenever a pre-defined distance threshold is reached. Then, in accordance to the computed guidance vector fields, different collision avoidance controllers that generate collision-free maneuvers are developed. Furthermore, it is shown that any tracking controller with convergence guarantees can be used with the avoidance controllers to track the streamlines of the collision avoidance vector fields. Finally, numerical simulations demonstrate the efficacy of the proposed approach and its ability to avoid collisions with static and moving pop-up threats in three different practical scenarios.
description: This is a revised version of the original published in the AIAA Journal of Guidance, Controls and Dynamics, Vol. 43, Iss. 1
Canonical Characteristic Sets of Characterizable Differential Ideals
Creators: name: Golubitsky, Oleg
name: Kondratieva, Marina
name: Ovchinnikov, Alexey
Publisher: name: arXiv
Year: 2007
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 12H05; 13N10; 13P10

description: We study the concept of canonical characteristic set of a characterizable differential ideal. We propose an efficient algorithm that transforms any characteristic set into the canonical one. We prove the basic properties of canonical characteristic sets. In particular, we show that in the ordinary case for any ranking the order of each element of the canonical characteristic set of a characterizable differential ideal is bounded by the order of the ideal. Finally, we propose a factorization-free algorithm for computing the canonical characteristic set of a characterizable differential ideal represented as a radical ideal by a set of generators. The algorithm is not restricted to the ordinary case and is applicable for an arbitrary ranking.
description: 26 pages
Tunneling Effect Near Weakly Isolated Horizon
Creators: name: Wu, Xiaoning
name: Gao, Sijie
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The tunneling effect near a weakly isolated horizon (WIH) has been studied. By applying the null geodesic method of Parikh and Wilczek and Hamilton-Jacibi method of Angheben et al. to a weakly isolated horizon, we recover the semiclassical emission rate in the tunneling process. We show that the tunneling effect exists in a wide class of spacetimes admitting weakly isolated horizons. The general thermodynamic nature of WIH is then confirmed.
description: 7 pages, accepted for publication in Physical Review D
Ανήλικοι δράστες του νόμου περί ναρκωτικών και η αντιμετώπιση τους
Creators: name: Παλαιολόγου, Αδαμαντία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ανήλικος
Εξάρτηση
Ναρκωτικά
Juvenile Offenders
Αddiction
Drugs

description: Αναμφισβήτητα το πρόβλημα της χρήσης κυρίως, αλλά και της διακίνησης ναρκωτικών ουσιών από ανηλίκους αποτελεί ένα πολυπαραγοντικό φαινόμενο που έχει προσλάβει ευρύτατες κοινωνικές διαστάσεις, ιδιαίτερα τα χρόνια της οικονομικής κρίσης. Στην εισαγωγή της παρούσας εργασίας, παρουσιάζεται συνοπτικά η ιστορική αναδρομή των ναρκωτικών, διασαφηνίζεται η έννοιά τους και οι παράγοντες που οδηγούν έναν ανήλικο στη χρήση τους. Στο πρώτο κεφάλαιο δίδεται η έννοια του δίκαιου των ανηλίκων και επιχειρείται η εμβάθυνση στις γενικές αρχές του. Συνεχίζοντας στο παρόν κεφάλαιο αναλύεται η ηλικιακή διάκριση των ανήλικων δραστών με βάση τον ποινικό κώδικα. Στο δεύτερο κεφάλαιο αναπτύσσονται οι διατάξεις του ποινικού κώδικα που αφορούν τους νεαρούς παραβάτες, ήτοι τα αναμορφωτικά και τα θεραπευτικά μέτρα και η ποινή του περιορισμού σε ειδικό κατάστημα κράτησης νέων. Στο τρίτο κεφάλαιο αναλύεται η αντιμετώπιση από τον Νόμο περί ναρκωτικών των εξαρτημένων ανήλικων δραστών και δίδεται η έννοια της εξάρτησης, καθώς και η διάγνωσή της. Στο τέταρτο κεφάλαιο επισημαίνονται ορισμένες δικονομικές διατάξεις που αφορούν στους ανήλικους παραβάτες. Τέλος, η παρούσα εργασία κλείνει με τον επίλογο, όπου τονίζεται η σημασία νομοθετικών πρωτοβουλιών εκ μέρους της πολιτείας.
description: Τhe problem of drug use and drug trafficking by minors is a multifactorial phenomenon, that has wider social dimensions, especially during the economic crisis. In the introduction the concept of drugs and the factors that lead a minor to use them, is clarified, in chronological order. In the first chapter the law of juvenile justice and the attempts to deepen its general principles, is explained. Furthermore, the age groups of juvenile offenders based on criminal code, is also analyzed. In the second chapter the provisions of the criminal code concerning juvenile offenders and the sentence of confinement in a special detention facility, is studied. In addition, the treatment of juvenile drug addict offenders and the concept of dependence as well as diagnosis, is explained in the third chapter. Subsequently procedural provisions concerning juvenile offenders, is examined in the fourth chapter and finally this study is finished by highlighting the importance of legislative initiatives on Government’s part.
description: Σε συνεργασία με: Πανεπιστήμιο Λευκωσίας (Κύπρος)
Distinguishing thixotropy from viscoelasticity
Creators: name: Agarwal, Mayank
name: Sharma, Shweta
name: Shankar, V.
name: Joshi, Yogesh M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Owing to nonlinear viscoelasticity, materials often show characteristic features that resemble those of thixotropy. This issue has been debated in the literature over the past several decades, and several experimental protocols have been proposed to distinguish thixotropy from viscoelasticity. In this work, we assess these protocols by carrying out experiments using polymer solutions, thixotropic clay dispersions, and modeling their behavior, respectively, using the FENE-P constitutive equation and a viscoelastic aging model. We find that the criteria proposed in the literature, such as a step down jump in the shear rate and shear startup at different waiting times elapsed since preshear, are inadequate to distinguish thixotropy from viscoelasticity. In marked contrast, we show that the application of step-strain or step-stress after cessation of the preshear serves as a useful discriminant between thixotropy and viscoelasticity. In thixotropic materials, we observe that the application of step strain (or step stress) after cessation of the preshear eventually leads to slowing down of relaxation dynamics as a function of waiting time. However, for viscoelastic materials, the relaxation modulus (creep compliance) curve shifts to lower modulus (higher compliance) values as a function of waiting time until equilibrium is reached. While the proposed criterion offers a robust distinction between viscoelasticity and thixotropy for the systems studied here, further experimental investigations based on other systems are needed to establish its versatility and will lead to a greater insight into this long-standing issue in rheological categorization.
description: 60 pages, 22 figures. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in (Agarwal et al., Journal of Rheology 65, 663 (2021))
Additional file 4: of Genome-wide analysis of cotton GH3 subfamily II reveals functional divergence in fiber development, hormone response and plant architecture
Creators: name: Yu, Daoqian
name: Qanmber, Ghulam
name: Lu, Lili
name: Wang, Lingling
name: Li, Jie
name: Yang, Zhaoen
name: Liu, Zhao
name: Li, Yi
name: Chen, Quanjia
name: Mendu, Venugopal
name: Li, Fuguang
name: Yang, Zuoren
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology

description: Table S3. Comparison of characteristics of GH3s identified in two genome assemblies of G. hirsutum. (DOCX 19â kb)
Semi-classical analysis and passive imaging
Creators: name: De Verdière, Yves Colin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 86A15,35S30,35Q72,60G60

description: Passive imaging is a new technique which has been proved to be very efficient, for example in seismology: the correlation of the noisy fields, computed from the fields recorded at different points, is strongly related to the Green function of the wave propagation. The aim of this paper is to provide a mathematical context for this approach and to show, in particular, how the methods of semi-classical analysis can be be used in order to find the asymptotic behaviour of the correlations.
description: Invited paper to appear in NONLINEARITY; Accepted Revised version
Helioseismological determination of the subsurface spatial spectrum of solar convection: Demonstration using numerical simulations
Creators: name: Böning, Vincent G. A.
name: Birch, Aaron C.
name: Gizon, Laurent
name: Duvall, Thomas L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Understanding convection is important in stellar physics, for example as an input in stellar evolution models. Helioseismic estimates of convective flow amplitudes in deeper regions of the solar interior disagree by orders of magnitude among themselves and with simulations. We aim to assess the validity of an existing upper limit of solar convective flow amplitudes at a depth of 0.96 solar radii obtained using time-distance helioseismology and several simplifying assumptions. We generated synthetic observations for convective flow fields from a magnetohydrodynamic simulation (MURaM) using travel-time sensitivity functions and a noise model. We compared the estimates of the flow with the actual values. For the scales of interest ($\ell<100$), we find that the current procedure for obtaining an upper limit gives the correct order of magnitude of the flow for the given flow fields. We also show that this estimate is not an upper limit in a strict sense because it underestimates the flow amplitude at the largest scales by a factor of about two because the scale dependence of the signal-to-noise ratio has to be taken into account. After correcting for this and after taking the dependence of the measurements on direction in Fourier space into account, we show that the obtained estimate is indeed an upper limit. We conclude that time-distance helioseismology is able to correctly estimate the order of magnitude (or an upper limit) of solar convective flows in the deeper interior when the vertical correlation function of the different flow components is known and the scale dependence of the signal-to-noise ratio is taken into account. We suggest that future work should include information from different target depths to better separate the effect of near-surface flows from those at greater depths. The measurements are sensitive to all three flow directions, which should be taken into account.
description: 16 pages, 13 figures, accepted for publication in A&A
Electrical low-frequency $1/f^γ$ noise due to surface diffusion of scatterers on an ultra low noise graphene platform
Creators: name: Kamada, Masahiro
name: Laitinen, Antti
name: Zeng, Weijun
name: Will, Marco
name: Sarkar, Jayanta
name: Tappura, Kirsi
name: Seppä, Heikki
name: Hakonen, Pertti
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Low-frequency $1/f^γ$ noise is ubiquitous, even in high-end electronic devices. For qubits such noise results in decrease of their coherence times. Recently, it was found that adsorbed O$_2$ molecules provide the dominant contribution to flux noise in superconducting quantum interference devices. To clarify the basic principles of such adsorbant noise, we have investigated the formation of low-frequency noise while the mobility of surface adsorbants is varied by temperature. In our experiments, we measured low-frequency current noise in suspended monolayer graphene samples under the influence of adsorbed Ne atoms. Owing to the extremely small intrinsic noise of graphene in suspended Corbino geometry, we could resolve a combination of $1/f^γ$ and Lorentzian noise spectra induced by the presence of Ne. We find that the $1/f^γ$ noise is caused by surface diffusion of Ne atoms and by temporary formation of few-Ne-atom clusters. Our results support the idea that clustering dynamics of defects is relevant for understanding of $1/f$ noise in general metallic systems.
description: Manuscript and SI
Field sweep rate dependence of magnetic domain patterns: Numerical simulations for a simple Ising-like model
Creators: name: Kudo, Kazue
name: Nakamura, Katsuhiro
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study magnetic domain patterns in ferromagnetic thin films by numerical simulations for a simple Ising-like model. Magnetic domain patterns after quench demonstrate various types of patterns depending on the field sweep rate and parameters of the model. How the domain patterns are formed is shown with use of the number of domains, the domain area, and domain area distributions as well as snapshots of domain patterns. Considering the proper time scale of the system, we propose a criterion for the structure of domain patterns.
description: 11 pages, 7 figures
The non-zero energy of 2+1 Minkowski space
Creators: name: Marolf, Donald
name: Patiño, Leonardo
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We compute the energy of 2+1 Minkowski space from a covariant action principle. Using Ashtekar and Varadarajan's characterization of 2+1 asymptotic flatness, we first show that the 2+1 Einstein-Hilbert action with Gibbons-Hawking boundary term is both finite on-shell (apart from past and future boundary terms) and stationary about solutions under arbitrary smooth asymptotically flat variations of the metric. Thus, this action provides a valid variational principle and no further boundary terms are required. We then obtain the gravitational Hamiltonian by direct computation from this action. The result agrees with the Hamiltonian of Ashtekar and Varadarajan up to an overall addititve constant. This constant is such that 2+1 Minkowski space is assigned the energy E = -1/4G, while the upper bound on the energy is set to zero. Any variational principle with a boundary term built only from the extrinsic and intrinsic curvatures of the boundary is shown to lead to the same result. Interestingly, our result is not the flat-space limit of the corresponding energy -1/8G of 2+1 anti-de Sitter space.
description: 16 pages, minor changes
Comprehensive discourse analysis of symbolic externalization
Creators: name: Wiebe, Katharine
Publisher: name: University of British Columbia
Year: 2008

description: The purpose of this study was to discover how therapist and clients co-create relational novelty using symbolic externalization intervention in successful Experiential Systemic Therapy (ExST) for marital treatment of alcohol dependence through a single case study design. A comprehensive discourse analysis method was used to study the therapeutic conversation within a 15 minute therapy episode in which therapist and clients externalized the problem of alcohol. The therapy episode was video-taped, audio-taped, transcribed and then analyzed according to the procedures of comprehensive discourse analysis. The analysis of the clients' and therapist's discourse revealed eight themes that contributed to co-creating relational novelty at the intrapersonal, interpersonal and symptomatic system levels. The themes co-constructed by the therapist and clients to attain relational novelty included: (a) creating and maintaining a collaborative atmosphere; (b) challenging propositions and competence; (c) refraining alcohol as a seducer; (d) moving from an individual to a relational understanding of the role of alcohol in the couple’s relationship; (e) re-defining and accenting the couple’s commonalities; (f) diffusing tension and defensiveness; (g) regulating the intensity of experiences; and (h) deepening contrasting experiences. The therapeutic process involved movement away from the old, restrictive story or meaning of the alcohol dependence toward a new perspective while simultaneously moderating the atmosphere and character of the therapy. The outcome, the proximal in-session relational novelty, that the therapist and clients co-created using the symbolic externalization intervention demonstrated that therapeutic change is a dynamic, interactive, and context dependent process.
On the Physical Interpretation of Partial Traces: Two Nonstandard Viewpoints
Creators: name: Garola, Claudio
name: Sozzo, Sandro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Mixed states are introduced in physics in order to express our ignorance about the actual state of a physical system and are represented in standard quantum mechanics (QM) by density operators. Such operators also appear if one considers a (pure) entangled state of a compound system $Ω$ and performs partial traces on the projection operator representing it. Yet, they do not represent mixed states (or proper mixtures) of the subsystems in this case, but improper mixtures, since the coefficients in the convex sums expressing them never bear the ignorance interpretation. Hence, one cannot attribute states to the subsystems of a compound physical system in QM (subentity problem). We discuss here two alternative proposals that can be worked out within the Brussels and Lecce approaches. We firstly summarize the general framework provided by the former, which suggests that improper mixtures could be considered as new pure states. Then, we show that improper mixtures can be considered as true (yet nonpure) states also according to the latter. The two proposals seem to be compatible notwithstanding their different terminologies.
description: Revised Introduction. Minor changes in the abstract and in Secs. 2-5
A higher-multipole gravitational waveform model for an eccentric binary black holes based on the effective-one-body-numerical-relativity formalism
Creators: name: Liu, Xiaolin
name: Cao, Zhoujian
name: Zhu, Zong-Hong
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct a new factorized waveform including $(l,|m|)=(2,2),(2,1),(3,3),(4,4)$ modes based on effective-one-body (EOB) formalism, which is valid for spinning binary black holes (BBH) in general equatorial orbit. When combined with the dynamics of $\texttt{SEOBNRv4}$, the $(l,|m|)=(2,2)$ mode waveform generated by this new waveform can fit the original $\texttt{SEOBNRv4}$ waveform very well in the case of a quasi-circular orbit. We have calibrated our new waveform model to the Simulating eXtreme Spacetimes (SXS) catalog. The comparison is done for BBH with total mass in $(20,200)M_\odot$ using Advanced LIGO designed sensitivity. For the quasi-circular cases we have compared our $(2,2)$ mode waveforms to the 281 numerical relativity (NR) simulations of BBH along quasi-circular orbits. All of the matching factors are bigger than 98\%. For the elliptical cases, 24 numerical relativity simulations of BBH along an elliptic orbit are used. For each elliptical BBH system, we compare our modeled gravitational polarizations against the NR results for different combinations of the inclination angle, the initial orbit phase and the source localization in the sky. We use the the minimal matching factor respect to the inclination angle, the initial orbit phase and the source localization to quantify the performance of the higher modes waveform. We found that after introducing the high modes, the minimum of the minimal matching factor among the 24 tested elliptical BBHs increases from 90\% to 98\%. Following our previous $\texttt{SEOBNRE}$ waveform model, we call our new waveform model $\texttt{SEOBNREHM}$. Our $\texttt{SEOBNREHM}$ waveform model can match all tested 305 SXS waveforms better than 98\% including highly spinning ($χ=0.99$) BBH, highly eccentric ($e\approx0.15$) BBH and large mass ratio ($q=10$) BBH.
description: 26 pages, 18 figures
On a new symmetry of the solutions of the wave equation in the background of a Kerr black hole
Creators: name: Beyer, Horst R.
name: Holmes, Irina
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: This short paper derives the constant of motion of a scalar field in the gravitational field of a Kerr black hole which is associated to a Killing tensor of that space-time. In addition, there is found a related new symmetry operator S for the solutions of the wave equation in that background. That operator is a partial differential operator with a leading order time derivative of the first order that commutes with a normal form of the wave operator. That form is obtained by multiplication of the wave operator from the left with the reciprocal of the coefficient function of its second order time derivative. It is shown that S induces an operator that commutes with the generator of time evolution in a formulation of the initial value problem for the wave equation in the setting of strongly continuous semigroups.
Field-induced valence fluctuation in YbB$_{12}$
Creators: name: Kurihara, R.
name: Miyake, A.
name: Tokunaga, M.
name: Ikeda, A.
name: Matsuda, Y. H.
name: Miyata, A.
name: Gorbunov, D. I.
name: Nomura, T.
name: Zherlitsyn, S.
name: Wosnitza, J.
name: Iga, F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We performed high-magnetic-field ultrasonic experiments on YbB$_{12}$ up to 59 T to investigate the valence fluctuations in Yb ions. In zero field, the longitudinal elastic constant $C_{11}$, the transverse elastic constants $C_{44}$ and $\left( C_{11} - C_{12} \right)/2$, and the bulk modulus $C_\mathrm{B}$ show a hardening with a change of curvature at around 35 K indicating a small contribution of valence fluctuations to the elastic constants. When high magnetic fields are applied at low temperatures, $C_\mathrm{B}$ exhibits a softening above a field-induced insulator-metal transition signaling field-induced valence fluctuations. Furthermore, at elevated temperatures, the field-induced softening of $C_\mathrm{B}$ takes place at even lower fields and $C_\mathrm{B}$ decreases continuously with field. Our analysis using the multipole susceptibility based on a two-band model reveals that the softening of $C_\mathrm{B}$ originates from the enhancement of multipole-strain interaction in addition to the decrease of the insulator energy gap. This analysis indicates that field-induced valence fluctuations of Yb cause the instability of the bulk modulus $C_\mathrm{B}$.
description: 15 pages, 11 figures
Το σχέδιο αναδιοργάνωσης ως τρόπος περάτωσης της πτώχευσης
Creators: name: Γιαννακού, Ευαγγελία Ταξιαρχούλα Ευστρατίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Πτωχευτικό Δίκαιο
Πτώχευση
Σχέδιο αναδιοργάνωσης
Bankruptcy Law
Bankruptcy
Reorganisation plan

description: Στην παρούσα μελέτη γίνεται μια εκτενής ανάλυση της διαδικασίας του σχεδίου αναδιοργάνωσης που ορίζεται στα άρθρα 107 – 131 ΠτΚ. Με την εισαγωγή του Πτωχευτικού Κώδικα το 2007, εισήχθη και η διαδικασία αναδιοργάνωσης, που αποτελεί τον έναν από τους δύο βασικούς τρόπους περάτωσης της πτώχευσης. Ο άλλος τρόπος είναι η ένωση των πιστωτών και οι δύο μαζί αποτελούν ένα ενιαίο σύστημα εκκαθάρισης και αναδιοργάνωσης. Το σχέδιο αναδιοργάνωσης έχει ως σκοπό την διατήρηση και την διάσωση της επιχείρησης, ενώ ως θεσμός μπορεί να λειτουργήσει αποκλειστικά και μόνο κατόπιν της κήρυξης της πτώχευσης. Στο πρώτο κεφάλαιο παρουσιάζεται το προϊσχύσαν δίκαιο, ήτοι του πτωχευτικού συμβιβασμού που αντικαταστάθηκε από το σχέδιο αναδιοργάνωσης. Στο δεύτερο κεφάλαιο αναλύονται τα αλλοδαπά νομοθετικά πρότυπα, από τα οποία το ελληνικό σχέδιο αναδιοργάνωσης αντλεί σαφές επιρροές. Στο τρίτο κεφάλαιο γίνεται μία αναφορά στην εξέλιξη του πτωχευτικού δικαίου προς την κατεύθυνση διάσωσης της επιχείρησης, ενώ στο τέταρτο και πέμπτο αναλύεται εκτενώς και λεπτομερώς η διαδικασία του σχεδίου αναδιοργάνωσης στο ελληνικό πτωχευτικό δίκαιο. Τέλος, ακολουθούν τα συμπεράσματα.
description: This thesis analyses the process of the reorganisation plan as is referred to the articles 107 – 131 of the Bankruptcy Code. The reorganisation plan, that was introduced by the Bankruptcy Code of 2007, aims to rescue the company and keep it in operation. Moreover, this process enters into force after the declaration of bancruptcy. The first chapter analyses the previous law that has been replaced by the reorganisation plan. The second one presents the foreign legislative standards that have influenced the greek reorganisation plan. In the third chapter reference is made to the Bankruptcy Law’s evolution for the purposes of companies’ rescue. In the fourth and fifth chapter, the process of the reorganisation plan is analysed in detail. This thesis ends with the reference of the conclusions.
Theoretical overview on tau physics
Creators: name: Pich, Antonio
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Precise measurements of the tau lepton properties provide stringent tests of the Standard Model structure and accurate determinations of its parameters. We overview the present status of a few selected topics: lepton universality, QCD tests and the determination of alpha_s, m_s and V_us from hadronic tau decays, and lepton flavor violation phenomena.
description: Invited talk at the International Workshop on Tau-Charm Physics (Charm2006), Beijing, China, June 5-7, 2006. 8 pages, 2 figures
Quark flavor decomposition of the nucleon axial form factors
Creators: name: Alexandrou, C.
name: Bacchio, S.
name: Constantinou, M.
name: Hadjiyiannakou, K.
name: Jansen, K.
name: Koutsou, G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present results on the isoscalar form factors including the disconnected contributions, as well as on the strange and charm quark form factors. Using previous results on the isovector form factors, we determine the flavor decomposition of the nucleon axial form factors. These are computed using an ensemble of $N_f=2+1+1$ twisted mass fermions simulated with physical values of quark masses. We investigate the SU(3) flavor symmetry and show that there is up to 10\% breaking for the axial and up to 50\% for the induced pseudoscalar form factors. By fitting the $Q^2$-dependence, we determined the corresponding root mean square radii. The pseudoscalar coupling of the $η$ meson and the nucleon is found to be $g_{ηNN}=3.7(1.0)(0.7)$, and the Goldberger-Treiman discrepancy for the octet combination about 50\%.
Insights into the N6-methyladenosine mechanism and its functionality: progress and questions
Creators: name: Scarrow, Margaret
name: Chen, Ning
name: Sun, Genlou
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences

description: N6-methyladenosine (m6A) RNA methylation has become a progressively popular area of molecular research since the discovery of its potentially essential regulatory role amongst eukaryotes. m6A marks are observed in the 5’UTR, 3’UTR and coding regions of eukaryotes and its mediation has been associated with various human diseases, RNA stability and translational efficiency. To understand the implications of m6A methylation in molecular governance, its functionality and mechanism must be initially understood. m6A regulation through its readers, writers and erasers as well as an insight into the potential “cross-talk” occurring between m6A and previously well documented regulatory molecular mechanisms have been characterized. The majority of research to date has been limited to few species and has yet to explore the species- and tissue specific nature or mechanistic plasticity of m6A regulation. There is still a tremendous gap in our knowledge surrounding the mechanism and functionality of m6A RNA methylation. Here we review the formation, removal, and decoding of m6A amongst animals, yeast, and plants while noting potential “cross-talk” between various mechanisms and highlighting potential areas of future research.
Variability of the NGC 1333 IRAS 4A Outflow: Molecular Hydrogen and Silicon Monoxide Images
Creators: name: Choi, Minho
name: Hodapp, Klaus W.
name: Hayashi, Masahiko
name: Motohara, Kentaro
name: Pak, Soojong
name: Pyo, Tae-Soo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The NGC 1333 region was observed in the H2 1-0 S(1) line. The H2 images cover a 5' x 7' region around IRAS 4. Numerous H2 emission features were detected. The northeast-southwest bipolar outflow driven by IRAS 4A was studied by combining the H2 images with SiO maps published previously. The SiO-H2 outflows are continuous on the southwestern side but show a gap on the northeastern side. The southwestern outflow lobe curves smoothly, and the position angle increases with the distance from the driving source. The base and the outer tip of the northeastern outflow lobe are located at positions opposite to the corresponding parts of the southwestern lobe. This point-symmetry suggests that the outflow axis may be drifting or precessing clockwise in the plane of the sky and that the cause of the axis drift may be intrinsic to the outflow engine. The axis drift model is supported by the asymmetric lateral intensity profile of the SiO outflow. The axis drift rate is about 0.011 deg yr-1. The middle part of the northeastern outflow does not exactly follow the point symmetry because of the superposition of two different kinds of directional variability: the axis drift of the driving source and the deflection by a dense core. The axis drift model provides a good explanation for the large deflection angle of the northeastern outflow. Other H2 emission features around the IRAS 4 region are discussed briefly. Some of them are newly found outflows, and some are associated with outflows already known before.
The filamentary structures in the CO emission toward the Milky Way disk
Creators: name: Soler, J. D.
name: Beuther, H.
name: Syed, J.
name: Wang, Y.
name: Henning, Th.
name: Glover, S. C. O.
name: Klessen, R. S.
name: Sormani, M. C.
name: Heyer, M.
name: Smith, R. J.
name: Urquhart, J. S.
name: Yang, J.
name: Su, Y.
name: Zhou, X.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a statistical study of the filamentary structure orientation in the CO emission observations obtained in the Milky Way Imaging Scroll Painting (MWISP) survey in the range $25.8°< l < 49.7°$, $|b| \leq 1.25°$, and $-100 < v_{\rm LSR} < 135$ km/s. We found that most of the filamentary structures in the $^{12}$CO and $^{13}$CO emission do not show a global preferential orientation either parallel or perpendicular to the Galactic plane. However, we found ranges in Galactic longitude and radial velocity where the $^{12}$CO and $^{13}$CO filamentary structures are parallel to the Galactic plane. These preferential orientations are different from those found for the HI emission. We consider this an indication that the molecular structures do not simply inherit these properties from parental atomic clouds. Instead, they are shaped by local physical conditions, such as stellar feedback, magnetic fields, and Galactic spiral shocks.
description: Accepted for publication in Astronomy & Astrophysics (7 pages, 7 figures). arXiv admin note: text overlap with arXiv:2007.07285
К вопросу о профессиональной ориентации просветительских медицинских лекций для студентов училищ и вузов немедицинского профиля
Creators: name: Сергеевич, Шевченко Александр
Publisher: name: Zenodo
Year: 2010
Subjects: медицинское просвещение
Молодежная Организация Медиков Харькова
МОМХ
ЗППП
ВИЧ/СПИД
химические зависимости
профилактическая медицина
health enlightenment
preventive medicine
Medical Youth Organization of Kharkov
MYOK
STD
HIV/AIDS
chemical addictions

description: На русском: [Шевченко А.С. К вопросу о профессиональной ориентации просветительских медицинских лекций для студентов училищ и вузов немедицинского профиля / Материалы Пироговской межвузовской научной конференции студентов и молодых ученых // Вестник РГМУ. Журнал Российского государственного медицинского университета (ISSN 2070-7320), №2(12). - РФ, Москва: РГМУ, 2000. - С. 208. https://doi.org/10.5281/zenodo.3345791] Работа Молодежной Организации Медиков Харькова компенсирует недостаток медицинских знаний студентов училищ и вузов немедицинского профиля по вопросам профилактики болезней, передающихся половым путем, ВИЧ/СПИДа, химических зависимостей, неотложной помощи и др. Ключевые слова: медицинское просвещение, Молодежная Организация Медиков Харькова (МОМХ), ЗППП, ВИЧ/СПИД, химические зависимости, профилактическая медицина. In English: [Shevchenko Alexander S. (2000). On the issue of vocational guidance educational medical lectures for students of schools and universities of non-medical profile (rus.) / Materials of the Pirogov Intercollegiate Scientific Conference of Students and Young Scientists // Bulletin of RSMU. Journal of the Russian State Medical University, 2(12): 208. https://doi.org/10.5281/zenodo.3345791] The work of the Medical Youth Organization of Kharkov (MYOK) compensates for the lack of medical knowledge of students of schools and universities of non-medical profile on the prevention of sexually transmitted diseases, HIV/AIDS, chemical dependencies, emergency care, etc.

 Keywords: health enlightenment, Medical Youth Organization of Kharkov (MYOK), STD, HIV/AIDS, chemical addictions, preventive medicine.
Implementation of a 3 x 3 directionally-unbiased linear optical multiport
Creators: name: Kim, Ilhwan
name: Lee, Donghwa
name: Hong, Seongjin
name: Cho, Young-Wook
name: Lee, Kwang Jo
name: Kim, Yong-Su
name: Lim, Hyang-Tag
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Linear optical multiports are widely used in photonic quantum information processing. Naturally, these devices are directionally-biased since photons always propagate from the input ports toward the output ports. Recently, the concept of directionally-unbiased linear optical multiports was proposed. These directionally-unbiased multiports allow photons to propagate along a reverse direction, which can greatly reduce the number of required linear optical elements for complicated linear optical quantum networks. Here, we report an experimental demonstration of a 3 x 3 directionally-unbiased linear optical fiber multiport using an optical tritter and mirrors. Compared to the previous demonstration using bulk optical elements which works only with light sources with a long coherence length, our experimental directionally-unbiased 3 x 3 optical multiport does not require a long coherence length since it provides negligible optical path length differences among all possible optical trajectories. It can be a useful building block for implementing large-scale quantum walks on complex graph networks.
description: 8 pages, 4 figures
On character generators for simple Lie algebras
Creators: name: Okeke, N.
name: Walton, M. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 17B10; 17B81

description: We study character generating functions (character generators) of simple Lie algebras. The expression due to Patera and Sharp, derived from the Weyl character formula, is first reviewed. A new general formula is then found. It makes clear the distinct roles of ``outside'' and ``inside'' elements of the integrity basis, and helps determine their quadratic incompatibilities. We review, analyze and extend the results obtained by Gaskell using the Demazure character formulas. We find that the fundamental generalized-poset graphs underlying the character generators can be deduced from such calculations. These graphs, introduced by Baclawski and Towber, can be simplified for the purposes of constructing the character generator. The generating functions can be written easily using the simplified versions, and associated Demazure expressions. The rank-two algebras are treated in detail, but we believe our results are indicative of those for general simple Lie algebras.
description: 50 pages, 11 figures
Kαταγγελία της σύμβασης franchising και απορρέουσες αξιώσεις
Creators: name: Κυργιάκη, Παρασκευή-Καλλιόπη Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Καταγγελία
Σύμβαση franchising
Απορρέουσες αξιώσεις
Termination
Franchising agreement
Derivative claims

description: Σκοπός της διατριβής είναι η μελέτη της λύσης της σύμβασης franchising κατόπιν ασκήσεως του δικαιώματος της τακτικής ή έκτακτης καταγγελίας. Αναλύονται ειδικότερα οι έννομες συνέπειες της λύσης, η προσωρινή δικαστική προστασία των συμβαλλόμενων μερών μέχρι την κρίση του Δικαστηρίου περί ακυρότητας ή μη της καταγγελίας, οι απορρέουσες από τη λύση συμβατικές υποχρεώσεις των μερών, η προστασία των τυχόν αναπόσβεστων επενδύσεων που έγιναν κατά τη διάρκεια της σύμβασης, η δυνατότητα αξίωσης αποζημίωσης πελατείας του λήπτη με την αναλογική εφαρμογή του άρ. 9 του προεδρικού διατάγματος 219/1991 περί εμπορικών αντιπροσώπων καθώς και η μετασυμβατική απαγόρευση ανταγωνισμού.
description: The aim of the present thesis is the study of the issue of the termination of the franchise agreement after exercising the right of regular or extraordinary termination. In particular are analyzed the legal consequences of the termination, the temporary judicial protection of the parties until the Court’s judgment on the invalidity or not of the termination, the contractual obligations of the parties that arise from the termination, the protection of any non-depreciable investments made during the agreement, the possibility of claiming customer compensation of the franchisee with the analogous application of art. 9 of Presidential Decree 219/1991 on commercial agents as well as the post-contractual prohibition of competition.
Solitons as Key Parts to Produce a Universe in the Laboratory
Creators: name: Ansoldi, Stefano
name: Guendelman, Eduardo I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Cosmology is usually understood as an observational science, where experimentation plays no role. It is interesting, nevertheless, to change this perspective addressing the following question: what should we do to create a universe, in a laboratory? It appears, in fact, that this is, in principle, possible according to at least two different paradigms; both allow to circumvent singularity theorems, i.e. the necessity of singularities in the past of inflating domains which have the required properties to generate a universe similar to ours. The first of them is substantially classical, and is built up considering solitons which collide with surrounding topological defects, generating an inflationary domain of space-time. The second is, instead, partly quantum and considers the possibility of tunnelling of past-non-singular regions of spacetime into an inflating universe, following a well-known instanton proposal. We are, here, going to review some of these models, as well as highlight possible extensions, generalizations and the open issues (as for instance the detectability of child universes and the properties of quantum tunnelling processes) that still affect the description of their dynamics. In doing so we will remark how the works on this subject can represent virtual laboratories to test the role that fundamental principles of physics (particularly, the interplay of quantum and general relativistic realms) played in the formation of our universe.
description: Based on a talk given at the 2006 Biennial Meeting of the International Association for Relativistic Dynamics (IARD06). 11 pages, LaTeX
Τεχνικές αξιολόγησης ποιότητας οπτικοακουστικού περιεχομένου
Creators: name: Κυριακίδου, Φωτεινή Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ποιότητα
Βίντεο
Έλεγχος Ποιότητας
Αυτοματοποιημένος Έλεγχος Ποιότητας
Quality
Video
Quality Check
Automated Quality Check

description: Το ψηφιακό βίντεο βρίσκει εφαρμογή σε ένα ευρύ πεδίο που περιλαμβάνει τους τομείς ασφαλείας, την ιατρική, την ψυχαγωγία, την εκπαίδευση, την τέχνη κα. Η ποιότητα του θεωρείται σημαντική για την επίτευξη του σκοπού για τον οποίο έχει παραχθεί. Για αυτό το λόγο επιδιώκεται συνήθως η καλύτερη δυνατή ποιότητα τόσο από την πλευρά του παραγωγού όσο και από την πλευρά του χρήστη/καταναλωτή. Ωστόσο η έννοια της ποιότητας δεν είναι εύκολο να οριστεί ή να εκτιμηθεί. Στην εργασία εξετάζεται η έννοια της ποιότητας του οπτικοακουστικού περιεχομένου που παράγεται στο πλαίσιο μιας τηλεοπτικής παραγωγής. Ένα σύνολο 46 κλιπ/ βίντεο αξιολογείται ως προς την ποιότητά του από ειδικούς τεχνικούς της εικόνας. Στη συνέχεια τα κλιπ αξιολογούνται από δύο εργαλεία αυτοματοποιημένου ελέγχου ποιότητας που χρησιμοποιούνται στην τηλεοπτική παραγωγή. Τέλος γίνεται σύγκριση μεταξύ των αποτελεσμάτων και εξάγονται χρήσιμα συμπεράσματα ως προς τη διαδικασία του αυτοματοποιημένου ελέγχου, σε σχέση με τον υποκειμενικό έλεγχο ποιότητας, και το ρόλο του αρμόδιου ειδικού τεχνικού.
description: Digital video finds application in a wide field that includes the fields of security, medicine, entertainment, education, art, etc. Its quality is considered important for achieving the purpose for which it has been produced. For this reason, the best possible quality is usually sought from both the producer and the user / consumer. However the concept of quality is not easy to define or evaluate. The paper examines the concept of quality of audiovisual content produced in the context of a television production. A total of 46 clips / videos are evaluated for their quality by expert image technicians. The clips are then evaluated by two automated quality control tools used in television production. Finally, a comparison is made between the results and useful conclusions are drawn regarding the process of automated control, in relation to the subjective quality control, and the role of the competent expert.
description: Σε συνεργασία με: Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)