cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Structural distortion and magnetism of BiFeO3 epitaxial thin films: a Raman spectroscopy and neutron diffraction study
Creators: name: Bea, H.
name: Bibes, M.
name: Petit, S.
name: Kreisel, J.
name: Barthelemy, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A previous study of the growth conditions has shown that single-phase BiFeO3 thin films can only be obtained in a narrow pressure-temperature window and that these films display a weak magnetic moment. Here we study in more detail the structure and the magnetism of single-phase BiFeO3 films by means of reciprocal space mapping, Raman spectroscopy and neutron diffraction. X-ray and Raman data suggest that the BiFeO3 structure is tetragonal for 70 nm-thick films and changes to monoclinic for 240 nm-thick films, thus remaining different from that of the bulk (rhombohedral) structure. In the 240 nm monoclinically distorted film neutron diffraction experiments allow the observation of a G-type antiferromagnetic order as in bulk single crystals. However, the satellite peaks associated with the long-wavelength cycloid present in bulk BiFeO3 are not observed. The relevance of these findings for the exploitation of the magnetoelectric properties of BiFeO3 is discussed.
description: To appear in Philos. Mag. Lett. In particular, we provide a direct evidence for the spin-cycloid destruction in a BiFeO3 thin film
Phonon modes contribution in thermal rectification in graphene-C3B junction: A molecular dynamics study
Creators: name: Kiani, Leila
name: Hasanzadeh, Javad
name: Yousefi, Farrokh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences
subject: F.2.2
subject: 80-11

description: In this work using non-equilibrium molecular dynamics simulation we implement a series of simulation under positive and negative temperature gradient in order to investigate the thermal rectification in the graphene C3B junction GCB. The dependence of thermal rectification on temperature difference between the hot and the cold baths is obtained. The important quantity that we present here is the inplanes and out of plane phonon modes contribution in the thermal rectification. We see that the Y mode has high and positive thermal rectification while that the X and Z modes have small and negative thermal rectifications. Thermal rectification for Y mode increases sharply beyond T 30 K to 150 but for X and Z modes decrease slowly by increasing T Our results show that Y mode has major role in the thermal rectification Moreover the underlying mechanisms that leads to the thermal rectification and also Kapitza resistance at the interface are studied via the phonon density of states DOS
description: 19 pages, 6 figures
Finite-size domains in membranes with active two-state inclusions
Creators: name: Chen, Chien-Hsun
name: Chen, Hsuan-Yi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: FOS: Biological sciences

description: The distribution of inclusion-rich domains in membranes with active two-state inclusions is studied by simulations. Our study shows that typical size of inclusion-rich domains ($L$) can be controlled by inclusion activities in several ways. When there is effective attraction between state-1 inclusions, we find: (i) Small domains with only several inclusions are observed for inclusions with time scales ($\sim 10^{-3} {\rm s}$) and interaction energy [$\sim \mathcal{O}({\rm k_BT})$] comparable to motor proteins. (ii) $L$ scales as 1/3 power of the lifetime of state-1 for a wide range of parameters. (iii) $L$ shows a switch-like dependence on state-2 lifetime $k_{12}^{-1}$. That is, $L$ depends weakly on $k_{12}$ when $k_{12} < k_{12}^*$ but increases rapidly with $k_{12}$ when $k_{12} > k_{12}^*$, the crossover $k_{12}^*$ occurs when the diffusion length of a typical state-2 inclusion within its lifetime is comparable to $L$. (iv) Inclusion-curvature coupling provides another length scale that competes with the effects of transition rates.
description: 15 pages, 6 figures. to appear in Phys. Rev. E
The neutron 'thunder' accompanying the extensive air shower
Creators: name: Erlykin, A. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Simulations show that neutrons are the most abundant component among extensive air shower hadrons. However, multiple neutrons which appear with long delays in neutron monitors nearby the EAS core ('neutron thunder') are mostly not the neutrons of the shower, but have a secondary origin. The bulk of them is produced by high energy EAS hadrons hitting the monitors. The delays are due to the termalization and diffusion of neutrons in the moderator and reflector of the monitor accompanied by the production of secondary gamma-quanta. This conclusion raises the important problem of the interaction of EAS with the ground, the stuff of the detectors and their environment since they have often hydrogen containing materials like polyethilene in neutron monitors. Such interaction can give an additional contribution to the signal in the EAS detectors. It can be particularly important for the signals from scintillator or water tank detectors at km-long distances from the EAS core where neutrons of the shower become the dominant component after a few mcsec behind the EAS front.
description: 12 pages, 4 figures, accepted by J.Phys.G: Nucl.Part.Phys
MPEC 2024-A15 : 2023 YX1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 YX1

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
The effects of quantum instantons on the thermodynamics of the CP^(N-1) model
Creators: name: Andersen, Jens O.
name: Boer, Daniel
name: Warringa, Harmen J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using the 1/N expansion, we study the influence of quantum instantons on the thermodynamics of the CP^(N-1) model in 1+1 dimensions. We do this by calculating the pressure to next-to-leading order in 1/N, without quantum instanton contributions. The fact that the CP^1 model is equivalent to the O(3) nonlinear sigma model, allows for a comparison to the full pressure up to 1/N^2 corrections for N=3. Assuming validity of the 1/N expansion for the CP^1 model makes it possible to argue that the pressure for intermediate temperatures is dominated by the effects of quantum instantons. A similar conclusion can be drawn for general N values by using the fact that the entropy should always be positive.
description: 7 pages, 5 figures, revtex. To appear in PRD. Some arguments and conclusions reformulated
Penerapan Konseling Eksistensial Humanistik Teknik Pemodelan Untuk Meningkatkan Perilaku Tanggung Jawab Belajar Siswa
Creators: name: Febri Adhari Syahwitri, Yenti Arsini, Sylvina Febrianti
Publisher: name: Zenodo
Year: 2024

description: Penelitian ini bertujuan untuk mengetahui peningkatan perilaku tanggung jawab belajar siswa. Untuk membantu siswa dalam menghadapi permasalahan terkait dengan tanggung jawab belajar rendah. modeling sebagai proses belajar melalui observasi dimana tingkah laku dari individu atau kelompok, sebagai model, berperan sebagai rangsangan bagi pikiran, sikap, atau tingkah laku sebagai bagian dari individu yang lain yang mengobservasi model yang ditampilkan.Teknik pemodelan, individu mengamati seorang model dan kemudian diperkuat untuk mencontoh tingkah laku sang model. penelitian yang bersifat relatif oleh pelaku tindakan, yang dilakukan untuk meningkatkan kemampuan rasional, tanggung jawab dari tindakan-tindakan mereka dalam melaksanakan tugas, memperdalam pemahaman terhadap tindakan-tindakan yang dilakukan itu, serta memperbaiki kondisi dimana praktek-praktek pembelajaran tersebut dilakukan.Jadi untuk menumbuhkan perilaku tanggung jawab belajar siswa adanya model sangatlah efekftif guna menarik perhatian siswa sehingga perilaku siswa lebih tearah dengan baik. Melalui pemodelan siswa diarahkan memahami dan mengkondisikan dirinya agar mampu memahami menghadapi situasi tertentu.siswa diharapkan dapat meningkatkan perilaku tanggung jawab belajarnya sehingga mampu menjadi siswa yang berhasil.
Frobenius transformation, mirror map and instanton numbers
Creators: name: Schwarz, Albert
name: Vologodsky, Vadim
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We show that one can express Frobenius transformation on middle-dimensional p-adic cohomology of Calabi-Yau threefold in terms of mirror map and instanton numbers. We express the mirror map in terms of Frobenius transformation on p-adic cohomology . We discuss a $p$-adic interpretation of the conjecture about integrality of Gopakumar-Vafa invariants.
description: 13 pages,new section about Gopakumar-Vafa invariants added, some additions in the last section, some corrections
Two relations for the antisymmetrizer in the Hecke algebra
Creators: name: Bytsko, Andrei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Representation Theory (math.RT)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove two relations for the antisymmetrizer in the Hecke algebra and derive certain restrictions imposed by these relations on unitary representations of the Hecke algebra on tensor powers of the space ${\mathbb C}^n$.
description: 7 pages, LaTeX
A note on families of hyperelliptic curves
Creators: name: Gorchinskiy, Sergey
name: Viviani, Filippo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14A20; 14H10; 14D22; 14H45

description: We give a stack-theoretic proof for some results on families of hyperelliptic curves.
description: 8 pages; final version, to appear on Arch. Math
Potential energy surface interpolation with neural networks for instanton rate calculations
Creators: name: Cooper, April M.
name: Hallmen, Philipp P.
name: Kästner, Johannes
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Artificial neural networks are used to fit a potential energy surface. We demonstrate the benefits of using not only energies, but also their first and second derivatives as training data for the neural network. This ensures smooth and accurate Hessian surfaces, which are required for rate constant calculations using instanton theory. Our aim was a local, accurate fit rather than a global PES, because instanton theory requires information on the potential only in the close vicinity of the main tunneling path. Elongations along vibrational normal modes at the transition state are used as coordinates for the neural network. The method is applied to the hydrogen abstraction reaction from methanol, calculated on a coupled-cluster level of theory. The reaction is essential in astrochemistry to explain the deuteration of methanol in the interstellar medium.
Ανάπτυξη καταγραφικού συστήματος μέτρησης ιονίζουσας ακτινοβολίας με αισθητήρες Radfet
Creators: name: Ασανιώτης, Θεόδωρος Κανακάρη
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Αισθητήρας
Καταγραφικό σύστημα
Ακτινοβολία
Radfet
Data Logger
Radiation

description: Ο σκοπός αυτής της διπλωματικής εργασίας, είναι η ανάπτυξη ενός συστήματος μέτρησης υψηλής διακριτικής ικανότητας, ικανό να μετράει την μεταβολή της τάσης κατωφλίου δύο αισθητήρων Radfet που υπεισέρχεται από την ακτινοβόλησή τους από ιονίζουσα ακτινοβολία. Το σύστημα αυτό θα έχει επίσης τη δυνατότητα να μετράει την θερμοκρασία του χώρου, την ημερομηνία, την ώρα της διεξαγωγής της κάθε μέτρησης, αποθηκεύοντας όλες τις πληροφορίες αυτές σε μία κάρτα μνήμης μεγάλης χωρητικότητας. Από την επεξεργασία των μετρήσεων που αποθηκεύονται στη μνήμη κατά την διάρκεια μίας πειραματικής διαδικασίας, μπορεί να προκύψει η ποσότητα της ιονίζουσας ακτινοβολίας (π.χ ακτίνες Χ, γ, νετρόνια κτλ.) με την οποία ακτινοβολείται ο κάθε αισθητήρας σε ορισμένο χρόνο. Το σύστημα αυτό έχει τα χαρακτηριστικά ενός αυτόνομου Data Logger καθώς όλες οι μετρήσεις μπορούν να αποθηκεύονται σε μία μνήμη σε πραγματικό χρόνο και έχει την δυνατότητα να είναι φορητό, είτε να τροφοδοτείται μέσω τροφοδοτικών συσκευών. Για τους παραπάνω λόγους μπορεί να πάρει την ονομασία Radfet Dosimeter/DataLogger. Τέλος το σύστημα αυτό υποστηρίζει συνδεσιμότητα με ηλεκτρονικό υπολογιστή και με την βοήθεια ενός λογισμικού που αναπτύχθηκε έχει την δυνατότητα πραγματοποίησης διάφορων λειτουργιών.
description: The purpose of this thesis is to develop a high resolution measuring system, capable of measuring the threshold voltage of Radfet sensors. This system also measures the temperature and stores the date and time of each measurement into a large capacity memory card. Processing the measurement results, it is possible to calculate the amount of ionizing radiation (e.g. X-rays, c, neutrons, etc.) irradiated to the sensor at a given time. This system has the characteristics of an autonomous Data Logger and all measurements may be stored in a memory in real time. It also has the ability to be portable. This measuring system in reality is a “Radfet Dosimeter/DataLogger”. Finally this system supports computer connectivity and with the aid of the developed software is able to carry out many different functions.
Dark matter mass loss in galaxy flybys: dependence on impact parameter
Creators: name: Mitrašinović, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Galaxy flybys, interactions where two independent halos inter-penetrate but detach at a later time and do not merge, occur frequently at lower redshifts. These interactions can significantly impact the evolution of individual galaxies - from the mass loss and shape transformation to the emergence of tidal features and formation of morphological disc structures. The main focus of this paper is on the dark matter mass loss of the secondary, intruder galaxy, with the goal of determining a functional relationship between the impact parameter and dark matter mass loss. Series of N-body simulations of typical galaxy flybys (10:1 mass ratio) with differing impact parameters show that the dark matter halo leftover mass of the intruder galaxy follows a logarithmic growth law with impact parameter, regardless of the way the total halo mass is estimated. The lost mass then, clearly, follows the exponential decay law. The stellar component stretches faster as the impact parameter decreases, following the exponential decay law with impact parameter. Functional dependence on impact parameter in all cases seems universal, but the fitting parameters are likely sensitive to the interaction parameters and initial conditions (e.g. the mass ratio of interacting galaxies, initial relative velocity of the intruder galaxy, interaction duration). While typical flybys, investigated here, could not be the sole culprit behind the formation of ultra-diffuse or dark matter deficient galaxies, they can still contribute significantly. Rare, atypical and stronger flybys are worth further exploring.
description: 11 pages, 6 figures, published as OnLine-First in Serbian Astronomical Journal
Controllable non-reciprocal transmission of single photon in Mobius structure
Creators: name: Zhu, Hai-Yuan
name: Hu, Xin-Yuan
name: Lin, Jun-Jie
name: Wu, Jia-Yi
name: Li, Shuo
name: Wang, Yan-Xiang
name: Deng, Fu-Guo
name: Zhang, Na-Na
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose a controllable non-reciprocal transmission model. The model consists of a Mobius ring, which is connected with two one-dimensional semi-infinite chains, and with a two-level atom located inside one of the cavities of the Mobius ring. We use the method of Green function to study the transmittance of a single photon through the model. The results show that the non-reciprocal transmission can be achieved in this model and the two-level atom can behave as a quantum switch for the non-reciprocal transport of the single photon. This controllable non-reciprocal transmission model may inspire new quantum non-reciprocal devices.
description: 7 pages, 6 figures
Αλιευτική, Περιβαλλοντική και Αναπτυξιακή εκτίμηση των παράκτιων λιμνών της Βόρειας Ελλάδας
Creators: name: Πρασσάς, Γεώργιος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Αλιευτική διαχείρηση
Παράκτιες λίμνες
Λιμνοθάλασσες
Fisheries management
Coastal lakes
Lagoons

description: Αντικείμενο της παρούσας διατριβής είναι η καταγραφή της Αλιευτικής, Περιβαλλοντικής και Αναπτυξιακής κατάστασης των παράκτιων λιμνών των Ν. Καβάλας, Ξάνθης και Ροδόπης για τα έτη 1982 – 2010, 1974 – 2010 και 1980 – 2010 αντίστοιχα. Με βάση την ανάλυση των αλιευτικών δεδομένων που έγινε στην παρούσα εργασία, φαίνεται η δυναμική της αλιευτικής ικανότητας των υγροτόπων, καθώς επίσης και η άμεση επίδραση των περιβαλλοντικών αλλαγών στην αλιευτική παραγωγή. Η ανάλυση των δεδομένων ξεκινάει με την παρουσίαση της συνολικής ποσοστιαίας αλιευτικής σύνθεσης της κάθε περιοχής και επιμέρους ανά δεκαετίες. Με αυτόν τον τρόπο γίνονται ευδιάκριτες οι όποιες αλλαγές έχουν επέλθει στις αλιευτικές παραγωγές με την πάροδο του χρόνου. Στη συνέχεια, παρουσιάζεται η συνολική αλιευτική παραγωγή της κάθε λίμνης και παράκτιας λίμνης, ενώ συγχρόνως γίνεται μια προσπάθεια επεξήγησης των κατώτατων και των ανώτατων τιμών της παραγωγής ανά έτος. Οι αλιευτικές παραγωγές αποδίδονται ανα δεκαετίες και ελέγχονται οι πιθανές ανοδικές ή καθοδικές τάσεις αυτών. Παρουσιάζονται, επίσης, οι μεταβολές της αλιευτικής παραγωγής των κυριαρχούντων ειδών του κάθε οικοσυστήματος. Με βάση τις μεθόδους της ανάλυσης τάσεων (Trend Analysis), του κινητού μέσου όρου (Moving Average) και των μοντέλων ARIMA, εκτιμήθηκε η συνολική αλιευτική παραγωγή για τα επόμενα έτη. Τέλος η επιλογή του κατάλληλου μοντέλου ARIMA βασίστηκε στη μέθοδο Box-Jenkins
description: The subject of this dissertation is the recording of Piscatorial, Environmental and Developmental status of coastal lakes of Kavala, Xanthi and Rodopi for the years 1982 – 2010, 1974 – 2010 and 1980 – 2010 in correspondence. Based on the analysis of the data made in this paper, it is showed the dynamic capacity of wetlands, as well as the direct effect of environmental change on fish production. The data analysis begins with the presentation of the total percent composition of each fishing area and per individual decades. Thereby are getting visible any changes have occurred in fisheries yields over time. Then is presented the total fish production of each lake and lagoon, while attempting to explain the minimum and maximum values of production per year. The fish production is attributable per decade and is checked for any upward or downward trends of these. Are presented the changes in fisheries production of predominant species in each ecosystem. Based on the methods of Trend Analysis, moving average and ARIMA model, the production of total fisheries of the following years was estimated. The selection of the most suitable ARIMA model was based on the Box-Jekins method.
From economic general equilibrium to ecological system services for nature conservation and management: a methodological analysis and an empirical study based on 30 Italian industries
Creators: name: Zagonari, Fabio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: SECS-P/01 Economia politica

description: In this paper, I develop an operational methodology to consistently compare alternative sustainability paradigms (weak sustainability [WS], strong sustainability [SS], a-growth [AG], and de-growth [DG]) and different assessment approaches (life-cycle assessment [LCA], cost-benefit analysis [CBA], and multi-criteria analysis [MCA]) within alternative relationship frameworks (economic general equilibrium [EGE] and ecosystem services [ESS]). The goal is to suggest different environmental interventions (e.g., projects vs. policies) for nature management and guide decisions to achieve nature conservation, defined here as reducing environmental pressures to preserve the future environment and its functioning over time. I then apply the methodology to 30 interdependent industries in Italy for three pollutants (greenhouse-effect gases, polluted rain, and air pollution) and four resources (water, minerals, fossil fuels, biomass) during two periods (from 1990 to 2007 and from 1990 to 2012). The industries were prioritised in terms of interventions to be taken to diminish pollution damage and resource depletion (e.g., fishing and non-energy mining for any sustainability paradigm), whereas sustainability paradigms are compared in terms of their likelihood (i.e., WS > AG = DG > SS), robustness (i.e., AG > SS > DG > WS), effectiveness (i.e., SS > AG > DG > WS), and feasibility (i.e., SS > DG > WS > AG). Proper assessment approaches for projects are finally identified for situations when policies are infeasible (e.g., LCA in WS and SS, MCA in DG and SS within ESS, CBA in WS and AG within EGE), by suggesting MCA in WS within ESS once ecological services are linked to sustainability criteria.
Higgs instability in gapless superfluidity/superconductivity
Creators: name: Giannakis, Ioannis
name: Hou, Defu
name: Huang, Mei
name: Ren, Hai-cang
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this letter we explore the Higgs instability in the gapless superfluid/superconducting phase. This is in addition to the (chromo)magnetic instability that is related to the fluctuations of the Nambu-Goldstone bosonic fields. While the latter may induce a single-plane-wave LOFF state, the Higgs instability favors spatial inhomogeneity and cannot be removed without a long range force. In the case of the g2SC state the Higgs instability can only be partially removed by the electric Coulomb energy. But this does not exclude the possibility that it can be completely removed in other exotic states such as the gCFL state.
description: 4 pages, 2 figure, one figure added
Morphological Control of Linear Particle Deposits from the Drying of Inkjet-Printed Rivulets
Creators: name: Bridonneau, N.
name: Mattana, G.
name: Noël, V.
name: Zrig, S.
name: Carn, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We studied the morphology of linear particle deposits obtained by inkjet-printing of silica nanoparticle suspension in drying condition where contact line depinning occurs. We show that this evaporation mode can be obtained by adjusting the particle concentration in different solvents. For isolated drops, deposited manually or by inkjet printing, drying induces the formation of two concentric rings in which particles self-assemble into a monolayer. For fused drops, our main result is that stable rivulets could be formed by drop overlap leading, after drying, to the formation of three parallel lines composed of a self-assembled particle monolayer. The three lines are of homogeneous thickness with two very thin outer lines (~ 1 $μ$m width) and a wider central line (~ 20 $μ$m width). We reveal how the width of the resulting lines is influenced by drop spacing in a predictable manner for a large experimental window knowing the drop size.
Successful Yukawa structures in Warped Extra Dimensions
Creators: name: Silva-Marcos, J. I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: For a RS model, with SM fields in the bulk and the Higgs boson on the TeV-brane, we suggest two specific structures for the Yukawa couplings, one based on a permutation symmetry and the other on the Universal Strength of Yukawa couplings hypothesis (USY). In USY, all Yukawa couplings have equal strength and the difference in the Yukawa structure lies in some complex phase. In both scenarios, all Yukawa couplings are of the same order of magnitude. Thus, the main features of the fermion hierarchies are explained through the RS geometrical mechanism, and not because some Yukawa coupling is extremely small. We find that the RS model is particularly appropriate to incorporate the suggested Yukawa configurations. Indeed, the RS geometrical mechanism of fermion locations along the extra dimension, combined with the two Yukawa scenarios, reproduces all the present experimental data on fermion masses and mixing angles. It is quite remarkable that in the USY case, only two complex phases of definite value +-Pi/2 are sufficient to generate the known neutrino mass differences, while at same time, permitting large leptonic mixing in agreement with experiment.
description: 11 pages
Determinants of Fiscal Distress in Italian Municipalities
Creators: name: Gregori, Wildmer Daniel
name: Marattin, Luigi
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: SECS-P/01 Economia politica

description: Fiscal distress of local governments and municipalities is a non-negligible component of the public finance turmoil after the Great Recession. In this paper we consider a dataset of Italian municipalities over the period 2000-2012 and look for the main budget determinants of local default. According to our results the default probability is positively affected by the share of loan repayment over total spending.
This result is robust to alternative model specifications as well as inclusion of fixed effects, time dummies and macroeconomic control variables.
The SAURON project - VI. Line strength maps of 48 elliptical and lenticular galaxies
Creators: name: Kuntschner, H.
name: Emsellem, E.
name: Bacon, R.
name: Bureau, M.
name: Cappellari, M.
name: Davies, R. L.
name: de Zeeuw, P. T.
name: Falcon-Barroso, J.
name: Krajnovic, D.
name: McDermid, R. M.
name: Peletier, R. F.
name: Sarzi, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present absorption line strength maps of 48 representative elliptical and lenticular galaxies obtained as part of the SAURON survey of nearby galaxies. Using high-quality spectra, spatially binned to a constant signal-to-noise, we measure four key age, metallicity and abundance ratio sensitive indices from the Lick/IDS system over a two-dimensional field extending up to approximately one effective radius. We modify the classical Fe5270 index to define a new index, Fe5270S, which maximizes the usable spatial coverage of SAURON. Maps of Hbeta, Fe5015, Mgb and Fe5270S are presented for each galaxy. We use the maps to compute average line strengths integrated over circular apertures of one-eighth effective radius, and compare the resulting relations of index versus velocity dispersion with previous long-slit work. The metal line strength maps show generally negative gradients with increasing radius roughly consistent with the morphology of the light profiles. Remarkable deviations from this general trend exist, particularly the Mgb isoindex contours appear to be flatter than the isophotes of the surface brightness for about 40% of our galaxies without significant dust features. Generally these galaxies exhibit significant rotation. We infer from this that the fast-rotating component features a higher metallicity and/or an increased Mg/Fe ratio as compared to the galaxy as a whole. The Hbeta maps are typically flat or show a mild positive outwards radial gradient, while a few galaxies show strong central peaks and/or elevated overall Hbeta-strength likely connected to recent star-formation activity. For the most prominent post-starburst galaxies even the metal line strength maps show a reversed gradient. (abridged)
description: 33 pages, 28 figures. Accepted for publication in MNRAS. A version with full resolution figures is available at http://www.strw.leidenuniv.nl/sauron/papers/kuntschner2006_sauron6.pdf
Cell culture design for homogeneous proliferation of cells in three-dimensional nonwoven polymer scaffolds
Creators: name: Chen, Yu-Min
name: Tokoda, Chihoko
name: Tabata, Yasuhiko
Publisher: name: Taylor & Francis
Year: 2024
Subjects: Space Science
Medicine
Cell Biology
Biotechnology
Biological Sciences not elsewhere classified
Developmental Biology
Cancer
Hematology

description: The objective of this study is to establish strategies to uniformly proliferate cells in a three-dimensional nonwoven polyethylene terephthalate (PET)/ethylene vinyl alcohol (EVOH) scaffold by simple adjustments in seeding and culture methods and the scaffold design. The combined dynamic and static seeding (intermittent agitations at 300 rpm with 1 h interval) resulted in the highest seeding efficiency (71%) comparing to the static and continuous agitating seeding methods. Cell-attached scaffolds were cultivated under different conditions. The stirring culture permitted cells to proliferate to a significantly greater extent than the static or agitating cultures, although faster cell proliferation in the outer region of the scaffold was observed. Next, based on this observation, scaffolds were opened with holes to alleviate the cell aggregation. The effect of hole size and number of scaffolds on the distribution of cells proliferated in the scaffold was evaluated. Two of 1-mm holes showed to be an optimal adjustment to allow cells to proliferate in a homogeneous manner. After 14 days culture, both of the holes were filled by cells proliferated with a fourfold increase in the cell number. The cell viability in the scaffolds was also high upon evaluating the live/dead and 3[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) staining examinations. Different cell types of 3T3-L1, C3H/10T1/2, and KUM6 cells showed similar behavior of cell proliferation and distribution in the scaffold, indicating the applicability of the established procedure. It is concluded that the nonwoven PET/EVOH scaffold serves as a potential cell culture substrate for an efficient cell proliferation.
Σύνθεση και μελέτη δισυχνοτικής κεραίας για χρήση αναγνώστη διάταξης RFID στην ζώνη UHF
Creators: name: Κωστόγιαννης, Ιωάννης Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Δισυχνοτική
Μεταϋλικά
Κεραία
Dual-band
Metamaterial
Antenna

description: Το αντικείμενο της διπλωματικής εργασίας, ήταν η σύνθεση και η μελέτη δισυχνοτικής μικροταινιακής κεραίας σε υπόστρωμα μεταϋλικού, για χρήση σε RFID αναγνώστη. Η μικροταινιακή κεραία σχεδιάστηκε για τις ελεύθερες ζώνες συχνοτήτων UHF για RFID (866-912 MHZ). Το υπόστρωμα μεταϋλικού που χρησιμοποιήθηκε ήταν της μορφής πλέγματος ηλεκτρομαγνητικού χάσματος ζώνης [EBG_HIGP(High Impedance Ground Plane)] που έχει την ιδιότητα να ανακλά το προσπίπτον σε αυτό κύμα σε φάση ανεξάρτητα από την απόσταση στην οποία είναι τοποθετημένη η κεραία. Πραγματοποιήθηκε σύνθεση δισυχνοτικών πλεγμάτων EBG με διαφορετικές μορφές και με στόχο την επιλογή του κατάλληλου για την βέλτιστη λειτουργία της συνολικής κεραίας. Πραγματοποιήθηκε επίσης σχεδίαση τυπωμένων νησίδων διαφόρων μορφών και η επιλογή της τελικής δομής έγινε με κριτήριο τη δισυχνοτική λειτουργία του υβριδικού συστήματος τυπωμένη κεραία – ΕΒG, με συνυπολογισμό της ηλεκτρομαγνητικής αλληλεπίδρασης τους. Η τελική δομή παρουσιάζει α)δισυχνοτική λειτουργία β) ελαφρώς αυξημένη απολαβή, σε σχέση με την απλή τυπωμένη κεραία γ) ταυτόχρονη αύξηση της γωνίας ανοίγματος μισής ισχύος κατά 6-10 μοίρες ιδιότητα χρήσιμη σε ορισμένα δίκτυα RFID και δ) σημαντική μείωση της ακτινοβολίας, στον ημιχώρο πίσω από τη δομή, ιδιότητα που συμβάλλει στην ηλεκτρομαγνητική συμβατότητα του κεραιοσυστήματος και την ορθή κάλυψη του χώρου στον οποίο αναπτύσσεται το RFID δίκτυο.
description: The subject of the report was the design and the study of a dual-band micro-strip antenna upon a meta-material substrate, for RFID reader use. The micro-strip antenna was designed for operation at the free UHF bands for RFIDs (866-912 MHz). A meta-material substrate used was of (EBG_ HIGP) type which has the attribute to reflect the incident wave in phase, regardless of the proximity of the antenna. There has been design of dual-band EBG structures with different configurations, in order to choose the appropriate for the best antenna function, and also design of micro-strip patches of various forms. The selection of the final structure has been made with the criteria of the dual-band function of the hybrid system “micro-strip antenna – EBG lattice”, taking under consideration their electromagnetic interaction. The final structure has the following characteristics: a) dual-band function b) slightly higher gain, compared to the simple micro-strip antenna c) simultaneous increase in the half power angle for about 6 to 10 degrees, which is a useful attribute in certain RFID networks d) significant reduce in the radiation levels, on the half-space behind the structure, an attribute that contributes to the electromagnetic compatibility of the antenna system and the correct coverage of the RFID range .
Discovery of HC3O+ in space: The chemistry of O-bearing species in TMC-1
Creators: name: Cernicharo, J.
name: Marcelino, N.
name: Agundez, M.
name: Endo, Y.
name: Cabezas, C.
name: Bermudez, C.
name: Tercero, B.
name: de Vicente, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using the Yebes 40m and IRAM 30m radio telescopes, we detected a series of harmonically related lines with a rotational constant B0=4460.590 +/- 0.001 MHz and a distortion constant D0=0.511 +/- 0.005 kHz towards the cold dense core TMC-1. High-level-of-theory ab initio calculations indicate that the best possible candidate is protonated tricarbon monoxide, HC3O+. We have succeeded in producing this species in the laboratory and observed its J = 2-1 and 3-2 rotational transitions. Hence, we report the discovery of HC3O+ in space based on our observations, theoretical calculations, and laboratory experiments. We derive an abundance ratio N(C3O)/N(HC3O+) = 7. The high abundance of the protonated form of C3O is due to the high proton affinity of the neutral species. The chemistry of O-bearing species is modelled, and predictions are compared to the derived abundances from our data for the most prominent O-bearing species in TMC-1.
description: Accepted for publication in A&A Letters
Αποζημίωση από αδικαιολόγητη εκτέλεση (940 ΚΠολΔ)
Creators: name: Θεοδοσιάδου, Σημέλα Κυριάκου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Αποζημίωση
Εκτέλεση
Αδικοπραξία
Compensation
Execution
Tort

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη της αξίωσης αποζημίωσης σε περίπτωση αδικαιολόγητης εκτέλεσης κατά το άρθρο 940 ΚΠολΔ. Στην εισαγωγή, διακρίναμε την ελαττωματική αναγκαστική εκτέλεση σε αδικαιολόγητη, άκυρη και άδικη και εξετάσαμε συνοπτικά τον θεσμό της επαναφοράς των πραγμάτων στην προηγούμενη κατάσταση, καθώς και τις διαφορές του με την αξίωση αποζημίωσης. Στη συνέχεια διακρίναμε τις περιπτώσεις εκείνες στις οποίες ανακύπτει θέμα αποζημίωσης του καθ’ ου η εκτέλεση οφειλέτη και παρουσιάσαμε αναλυτικά τις αντίστοιχες προϋποθέσεις για την δημιουργία δικαιώματος αποζημίωσης. Ακόμη αναφερθήκαμε αναλυτικά στην διχογνωμία που έχει δημιουργηθεί σχετικά με την δυνατότητα έγερσης αγωγής αδικοπραξίας κατά τα άρθρα 914 και 919 ΑΚ αυτοτελώς και πέραν της αποζημίωσης του άρθρου 940 ΚΠολΔ. Ένα άλλο θέμα που θίξαμε ήταν η δυνατότητα αποζημίωσης μετά την εξαφάνιση άλλων εκτελεστών τίτλων εκτός της δικαστικής απόφασης. Ασχοληθήκαμε τέλος με τα δικονομικά ζητήματα στην αγωγή αποζημίωσης του άρθρου 940 ΚΠολΔ και συγκεκριμένα με την ενεργητική και παθητική νομιμοποίηση ως προς την άσκηση της αγωγής, το αρμόδιο δικαστήριο και την εφαρμοστέα διαδικασία.
description: The aim of this thesis was to investigate the claim for compensation in the event of unjustified execution under Article 940 CPC. In the introduction, we divided the defective forced execution into unreasonable, unfair and invalid, and briefly examined the statute of restoring the previous state, and the differences with the claim for compensation. Then, we saw those cases where a question of compensating the debtor against whom the execution and present in detail the relevant conditions for the creation of the compensation right. We also examined in detail the disagreement that has been created about the opportunity to bring actions in tort separately under Articles 914 and 919 CC and in addition to compensation under Article 940 CPC. Another aim of this study was to examine the possibility of compensation after the disappearance of other enforcement orders outside of the judgment. Finally we examined procedural issues in an action for damages under Article 940 CPC, namely active and passive legalization to bring the action, the court and the applicable procedure.
Black holes as boundaries in 2D dilaton supergravity
Creators: name: Bergamin, L.
name: Grumiller, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss 2D dilaton supergravity in the presence of boundaries. Generic ones lead to results different from black hole horizon boundaries. In particular, the respective numbers of physical degrees of freedom differ, thus generalizing the bosonic results of hep-th/0512230.
description: 6 pages; to appear in the proceedings of the Eleventh Marcel Grossman Meeting
Indeterminazione, Serendipity, Random:
tre “misure” dell’incertezza
Creators: name: Del Grosso Destrieri, Luigi
name: Bucchi, Massimiano
name: Brodesco, Alberto
name: Schiera, Pierangelo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: SPS/02 Storia delle dottrine politiche
SPS/08 Sociologia dei processi culturali e comunicativi

description: Il volume è un omaggio a Luigi del Grosso Destreri. Esso comprende un suo saggio inedito sull’epistemologia delle scienze sociali che dalla formazione della “coscienza scientifica moderna” arriva fino alla sociologia si-stemica e alla sua critica. L’idea di fondo – che collega questo saggio con i successivi - è che la conoscenza scientifica non deriva necessariamente dalla misurazione sempre più esatta dei fenomeni politici e sociali, ma può anche derivare «da osservazioni casuali che spingono la ricerca a indirizzarsi in nuove direzioni». Questa tensione verso un’epistemologia aperta viene ripresa da Alberto Brodesco che ripercorre la fortuna popolare della teoria dell’indeterminatezza scientifica di Heisenberg, mentre Massimiano Bucchi ricostruisce l’introduzione della categoria di serendipity da parte di Robert K. Merton. Pierangelo Schiera, infine, introdu-ce l’approccio storiografico della random history, come approccio che dovrebbe tentare di dare conto del carattere non necessariamente ordinato dell’esperienza storica.
Teacher’s beliefs, gender differences, and mathematics
Creators: name: Li, Qing
Publisher: name: University of British Columbia
Year: 2009

description: The major focus of this study is to explore, using the 1990 British Columbia Mathematics Assessment data at the Grade 7 level, gender differences in mathematics teachers' beliefs. As well, this study compared these differences to gender differences of students' beliefs found in the same data. The theoretical rationale for this study is based on a model devised by this researcher, namely the Modified Cognitively Guided Instruction (CGI) Research Model, which is the combination of the Cognitively Guided Instruction Research Model (Fennema, Carpenter, and Peterson, 1989) and the Autonomous Learning Behavior (ALB) Model (Fennema & Peterson, 1985). Two way ANOVA as well as planned comparisons (t-test) were used to investigate gender differences within and across a random sample of two status groups (teachers and students). The analysis of the data suggested several conclusions. First, male and female teachers are more similar than different with respect to their beliefs regarding the importance and difficulty of selected mathematics topics. And, Numbers and Operations was the only topic under study in which male and female teachers differed significantly. Male teachers rated Numbers and Operations more important than female teachers. Second, gender differences existed only in students' beliefs about the difficulty of Geometry, and Numbers and Operations. Female students, compared to male students, believe Geometry and Numbers and Operations more difficult. Third, the findings of this study show that the gender differences within each status group are similar. In addition, significant gender difference was found only in overall male's and female's (regardless of their status) beliefs about the importance of Numbers and Operations. Males rated Numbers and Operations significantly more important than females. Further research which directly investigates gender differences in teachers' beliefs and students' beliefs is suggested, as well as further research into relationships between gender differences in teachers' and students' beliefs.
Graph algorithms for bioinformatics
Creators: name: Profiti, Giuseppe <1980>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: INF/01 Informatica

description: Biological data are inherently interconnected: protein sequences are connected to their annotations, the annotations are structured into ontologies, and so on. While protein-protein interactions are already represented by graphs, in this work I am presenting how a graph structure can be used to enrich the annotation of protein sequences thanks to algorithms that analyze the graph topology. We also describe a novel solution to restrict the data generation needed for building such a graph, thanks to constraints on the data and dynamic programming. The proposed algorithm ideally improves the generation time by a factor of 5. The graph representation is then exploited to build a comprehensive database, thanks to the rising technology of graph databases. While graph databases are widely used for other kind of data, from Twitter tweets to recommendation systems, their application to bioinformatics is new. A graph database is proposed, with a structure that can be easily expanded and queried.
Prognosis Prediction in Covid-19 Patients from Lab Tests and X-ray Data through Randomized Decision Trees
Creators: name: Gerevini, Alfonso Emilio
name: Maroldi, Roberto
name: Olivato, Matteo
name: Putelli, Luca
name: Serina, Ivan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: AI and Machine Learning can offer powerful tools to help in the fight against Covid-19. In this paper we present a study and a concrete tool based on machine learning to predict the prognosis of hospitalised patients with Covid-19. In particular we address the task of predicting the risk of death of a patient at different times of the hospitalisation, on the base of some demographic information, chest X-ray scores and several laboratory findings. Our machine learning models use ensembles of decision trees trained and tested using data from more than 2000 patients. An experimental evaluation of the models shows good performance in solving the addressed task.
description: 5th International Workshop on Knowledge Discovery in Healthcare Data (KDH) at ECAI 2020, mortality prediction, COVID-19
Το εφαρμοστέο δίκαιο στην προσβολή δικαιωμάτων διανοητικής ιδιοκτησίας κατά τον Κανονισμό 864/2007 “Ρώμη ΙΙ”
Creators: name: Γεωργάνου, Αναστασία Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Ρώμη
Προσβολή
Διανοητική
Rome
Ιnfringement
Ιntellectual

description: Σκοπός της διπλωματικής εργασίας αποτέλεσε η μελέτη, υπό το πρίσμα του Κανονισμού 864/2007 «Ρώμη ΙΙ», ζητημάτων εφαρμοστέου δικαίου που ανακύπτουν από την προσβολή των δικαιωμάτων διανοητικής ιδιοκτησίας. Πιο συγκεκριμένα, στο πρώτο μέρος επιχειρήθηκε μία συνολική προσέγγιση των διεθνών πολυμερών συμβάσεων, καθώς και του ομοιόμορφου και εναρμονισμένου κοινοτικού δικαίου, δια των οποίων προστατεύονται τα δικαιώματα διανοητικής ιδιοκτησίας σε διεθνές και κοινοτικό επίπεδο. Στο δεύτερο μέρος της εργασίας μελετήθηκε ενδελεχώς το εφαρμοστέο δίκαιο στην προσβολή των δικαιωμάτων διανοητικής ιδιοκτησίας. Έμφαση δόθηκε στα βασικά χαρακτηριστικά και στο περιεχόμενο του Κανονισμού «Ρώμη ΙΙ». Ειδικότερα, παρουσιάσθηκε η ιστορία του εν λόγω Κανονισμού, καθώς και η συμβολή του στην επίλυση ζητημάτων που αφορούν το εφαρμοστέο δίκαιο στο πεδίο των αδικοπρακτικών ενοχών. Επιπλέον, μελετήθηκε η δομή του, η νομοτεχνική του διάρθρωση και το πεδίο εφαρμογής του ενώ αναλύθηκε εν συντομία και ο γενικός κανόνας ρύθμισης των αδικοπρακτικών ενοχών του Κανονισμού, το άρθρο 4. Εν συνεχεία, παρουσιάσθηκε ο δρόμος προς την υιοθέτηση του άρθρου 8 του Κανονισμού «Ρώμη ΙΙ», η παγκοσμίως αναγνωρισμένη αρχή της εδαφικότητας, η προσβολή των δικαιωμάτων διανοητικής ιδιοκτησίας μέσω διαδικτύου ενώ, τέλος, πραγματοποιήθηκε μία ενδελεχής ανάλυση των διατάξεων του άρθρου 8.
description: The purpose of this thesis is the presentation of applicable law matters arising from the infringement of intellectual property rights according to 864/2007 "Rome II" Regulation. More specifically, in the first part it was attempted an approach to international multilateral conventions, including the uniform and harmonized EU law, according to which the intellectual property rights are protected at international and community level. In the second part, the law applicable to the infringement of intellectual property rights was presented thoroughly. Emphasis was placed on the key features and the content of "Rome II" Regulation. In particular, the history of the Regulation was examined and its contribution to the resolution of issues concerning the law applicable to the field of tort obligations. In addition, it was studied the structure and the scope of the regulation and it was presented a brief analysis on the general rule regulating tort obligations, Article 4. Furthermore, there were presented historical data of the Article 8 of "Rome II" Regulation, the universally recognized principle of territoriality, the infringement of intellectual property rights via the Internet and, finally, the provisions of Article 8.