cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Supersymmetry breaking, brane dynamics and Swampland conjectures
Creators: name: Basile, Ivano
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate interactions between branes of various dimensions, both charged and uncharged, in three non-supersymmetric string models. These include the $USp(32)$ and $U(32)$ orientifold projections of the type IIB and type $0$B strings, as well as the $SO(16) \times SO(16)$ projection of the exceptional heterotic string. The resulting ten-dimensional spectra are free of tachyons, and the combinations of branes that they contain give rise to rich and varied dynamics. We compute static potentials for parallel stacks of branes in three complementary regimes: the probe regime, in which one of the two stacks is parametrically heavier than the other, the string-amplitude regime, in which both stacks are light, and the holographic regime. Whenever comparisons are possible, we find qualitative agreement despite the absence of supersymmetry. For charged branes, our analysis reveals that the Weak Gravity Conjecture is satisfied in a novel way via a renormalization of the effective charge-to-tension ratio.
description: 41 pages, 6 figures. v2: references added
Logic Programming with Satisfiability
Creators: name: Codish, Michael
name: Lagoon, Vitaly
name: Stuckey, Peter J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Programming Languages (cs.PL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This paper presents a Prolog interface to the MiniSat satisfiability solver. Logic program- ming with satisfiability combines the strengths of the two paradigms: logic programming for encoding search problems into satisfiability on the one hand and efficient SAT solving on the other. This synergy between these two exposes a programming paradigm which we propose here as a logic programming pearl. To illustrate logic programming with SAT solving we give an example Prolog program which solves instances of Partial MAXSAT.
description: 8 pages, 3 figures, 1 table
Derivation of Maxwell-Bloch-type equations by projection of quantum models
Creators: name: Mabuchi, Hideo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A simple algebraic procedure is described for deriving Maxwell-Bloch-type equations from single-atom cavity quantum electrodynamics (cavity QED) master equations via orthogonal projection onto a manifold of semiclassical states. In particular the usual Maxwell-Bloch Equations are obtained--up to a state-dependent correction factor of order unity--straightforwardly from the unconditional Jaynes-Cummings master equation. The technique of projecting onto a semiclassical manifold can also be applied with conditional master equations (quantum filters), leading to stochastic simulation models that include multiplicative noise terms associated with fluctuations of the atomic dipole. The utility of such models is briefly explored in the context of single-atom absorptive bistability.
description: 4 pages, 1 EPS figure
Reconstruction, with tunable sparsity levels, of shear-wave velocity profiles from surface wave data
Creators: name: Vignoli, Giulio
name: Guillemoteau, Julien
name: Barreto, Jeniffer
name: Rossi, Matteo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The analysis of surface wave dispersion curves is a way to infer the vertical distribution of shear-wave velocity. The range of applicability is extremely wide going, for example, from seismological studies to geotechnical characterizations and exploration geophysics. However, the inversion of the dispersion curves is severely ill-posed and only limited efforts have been put into the development of effective regularization strategies. In particular, relatively simple smoothing regularization terms are commonly used, even when this is in contrast with the expected features of the investigated targets. To tackle this problem, stochastic approaches can be utilized, but they are too computationally expensive to be practical, at least, in the case of large surveys. Instead, within a deterministic framework, we evaluate the applicability of a regularizer capable of providing reconstructions characterized by tunable levels of sparsity. This adjustable stabilizer is based on the minimum support regularization, applied before on other kinds of geophysical measurements, but never on surface wave data. We demonstrate the effectiveness of this stabilizer on i) two benchmark - publicly available - datasets at crustal and near-surface scales, ii) an experimental dataset collected on a well-characterized site. In addition, we discuss a possible strategy for the estimation of the depth of investigation. This strategy relies on the integrated sensitivity kernel used for the inversion and calculated for each individual propagation mode. Moreover, we discuss the reliability, and possible caveats, of the direct interpretation of this particular estimation of the depth of investigation, especially in the presence of sharp boundary reconstructions.
description: Accepted for publication by Geophysical Journal International
A Strong Szego Theorem for Jacobi Matrices
Creators: name: Ryckman, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We use a classical result of Gollinski and Ibragimov to prove an analog of the strong Szego theorem for Jacobi matrices on $l^2(\N)$. In particular, we consider the class of Jacobi matrices with conditionally summable parameter sequences and find necessary and sufficient conditions on the spectral measure such that $\sum_{k=n}^\infty b_k$ and $\sum_{k=n}^\infty (a_k^2 - 1)$ lie in $l^2_1$, the linearly-weighted $l^2$ space.
description: 26 pages
Additional file 23 of Genome-wide identification, classification, and expression analysis of the JmjC domain-containing histone demethylase gene family in birch
Creators: name: Chen, Bowei
name: Ali, Shahid
name: Zhang, Xu
name: Zhang, Yonglan
name: Wang, Min
name: Zhang, Qingzhu
name: Xie, Linan
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 23: Figure S7. Different gene modules of birch under cold stress analyzed by WGCNA.
Hereditary properties of partitions, ordered graphs and ordered hypergraphs
Creators: name: Balogh, József
name: Bollobás, Béla
name: Morris, Robert
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: In this paper we use the Klazar-Marcus-Tardos method to prove that if a hereditary property of partitions P has super-exponential speed, then for every k-permutation pi, P contains the partition of [2k] with parts {i, pi(i) + k}, where 1 <= i <= k. We also prove a similar jump, from exponential to factorial, in the possible speeds of monotone properties of ordered graphs, and of hereditary properties of ordered graphs not containing large complete, or complete bipartite ordered graphs. Our results generalize the Stanley-Wilf Conjecture on the number of n-permutations avoiding a fixed permutation, which was recently proved by the combined results of Klazar and of Marcus and Tardos. Our main results follow from a generalization to ordered hypergraphs of the theorem of Marcus and Tardos.
description: 25 pgs, no figures
Code Integrity Attestation for PLCs using Black Box Neural Network Predictions
Creators: name: Chen, Yuqi
name: Poskitt, Christopher M.
name: Sun, Jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Cyber-physical systems (CPSs) are widespread in critical domains, and significant damage can be caused if an attacker is able to modify the code of their programmable logic controllers (PLCs). Unfortunately, traditional techniques for attesting code integrity (i.e. verifying that it has not been modified) rely on firmware access or roots-of-trust, neither of which proprietary or legacy PLCs are likely to provide. In this paper, we propose a practical code integrity checking solution based on privacy-preserving black box models that instead attest the input/output behaviour of PLC programs. Using faithful offline copies of the PLC programs, we identify their most important inputs through an information flow analysis, execute them on multiple combinations to collect data, then train neural networks able to predict PLC outputs (i.e. actuator commands) from their inputs. By exploiting the black box nature of the model, our solution maintains the privacy of the original PLC code and does not assume that attackers are unaware of its presence. The trust instead comes from the fact that it is extremely hard to attack the PLC code and neural networks at the same time and with consistent outcomes. We evaluated our approach on a modern six-stage water treatment plant testbed, finding that it could predict actuator states from PLC inputs with near-100% accuracy, and thus could detect all 120 effective code mutations that we subjected the PLCs to. Finally, we found that it is not practically possible to simultaneously modify the PLC code and apply discreet adversarial noise to our attesters in a way that leads to consistent (mis-)predictions.
description: Accepted by the 29th ACM Joint European Software Engineering Conference and Symposium on the Foundations of Software Engineering (ESEC/FSE 2021)
Applications of Nanomagnets as Dynamical Systems
Creators: name: Rana, Bivas
name: Mondal, Amrit Kumar
name: Bandyopadhyay, Supriyo
name: Barman, Anjan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: When magnets are fashioned into nanoscale elements, they exhibit a wide variety of phenomena replete with rich physics and the lure of tantalizing applications. In this topical review, we discuss some of these phenomena, especially those that have come to light recently, and highlight their potential applications. We emphasize what drives a phenomenon, what undergirds the dynamics of the system that exhibits the phenomenon, how the dynamics can be manipulated, and what specific features can be harnessed for technological advances. For the sake of balance, we point out both advantages and shortcomings of nanomagnet based devices and systems predicated on the phenomena we discuss. Where possible, we chart out paths for future investigations that can shed new light on an intriguing phenomenon and/or facilitate both traditional and non-traditional applications.
Η αναδιοργάνωση δομών των ελληνικών ΟΤΑ, εργαλείο στην αντιμετώπιση της οικονομικής κρίσης: Η περίπτωση των παιδικών σταθμών του Δήμου Θεσσαλονίκης
Creators: name: Βαρδάκα, Ευριδίκη Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Τοπική Αυτοδιοίκηση
βρεφονηπιακοί/παιδικοί σταθμοί
οργανωσιακή δομή
οργανωσιακή αλλαγή
οργανόγραμμα
local authorities,
early childhood care,
organizational structure
organizational change
organization chart

description: Η παρούσα εργασία καταδεικνύει την εμπλοκή της Τοπικής Αυτοδιοίκησης στην οργάνωση και λειτουργία της πρώιμης παιδικής φροντίδας (Early childhood Care - ECC) σε πανευρωπαϊκό επίπεδο, χαρτογραφεί την υφιστάμενη κατάσταση στην Ελλάδα και αξιολογεί το ρόλο και την αποτελεσματικότητα των δήμων στην παροχή υπηρεσιών στον τομέα, καθώς αυτή αποτελεί και ένα πολύ σημαντικό εργαλείο στα χέρια της τοπικής αυτοδιοίκησης, στην προσπάθεια αντιμετώπισης της οικονομικής και κοινωνικής κρίσης. Με βάση τις αρχές και τα εργαλεία της Οργανωσιακής Θεωρίας και Σχεδιασμού (Organization Theory & Design), τις σύγχρονες τάσεις για προσαρμοσμένη εφαρμογή τους στο δημόσιο τομέα (Νέα Δημόσια Διοίκηση)).και θεωρώντας ότι οι δημοτικοί βρεφονηπιακοί/παιδικοί σταθμοί είναι τμήματα του ευρύτερου οργανισμού που λέγεται "δήμος", διερευνάται μέσα από την οργανωτική αλλαγή των αντίστοιχων υπηρεσιών που ανήκουν στο Δήμο Θεσσαλονίκης, το πώς πρέπει να δομηθούν αυτοί, ώστε να υπηρετήσουν αποτελεσματικά το σκοπό για την οποίο δημιουργήθηκαν, συνεισφέροντας έτσι στην εκπλήρωση της αποστολής του "δήμου" ως σύνολο. Εδώ παρουσιάζονται τα σημαντικότερα στοιχεία που θα πρέπει να λάβει υπ' όψη του ένας φορέας Τοπικής Αυτοδιοίκησης, όταν θα θελήσει να αναδιοργανώσει το πλέγμα λειτουργίας των δομών που διαθέτει για τη φροντίδα της πρώιμης παιδικής ηλικίας
description: This thesis demonstrates the involvement of the local authorities in the organization and operation of the Early Childhood Care (ECC) at European level. It also maps the existing situation in Greece and evaluates the role and effectiveness of local authorities, in providing services in the field. Providing reliable, high-quality child care is a very important tool in the hands of local authorities, in their effort to address the economic and social crisis. Based on the principles and tools of the Organizational Theory and Design and on the methods of New Public Management, this thesis considers the separate units of a day care system (kindergartens/crèches) as a part of the broader organization ("municipality"). Through the organizational change of the services that the Municipality of Thessaloniki runs, we explore which should be the structure of the separate sections of ECC service, in order to effectively serve the purpose for which they were created, fulfilling also the mission of "municipality" as a whole. For this aim, we present the most important elements to be taken into consideration by a local authority, in case of reorganization
Particle-antiparticle asymmetry in a relativistic deformed kinematics
Creators: name: Carmona, José Manuel
name: Cortés, José Luis
name: Relancio, José Javier
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Relativistic deformed kinematics are usually considered as a way to capture residual effects of a fundamental quantum gravity theory. These kinematics present a non-commutative addition law for the momenta, so that the total momentum of a multi-particle system depends on the specific ordering in which the momenta are composed. We explore in the present work how this property may be used to generate an asymmetry between particles and antiparticles through a particular ordering prescription, resulting in a violation of CPT symmetry. We study its consequences for muon decay, obtaining a difference in the lifetimes of the particle and the antiparticle as a function the new high-energy scale parameterizing such a relativistic deformed kinematics.
description: 13 pages. Version published in Symmetry (prior to journal proofs); the article belongs to the Special Issue "Symmetry, CPT and Astroparticles"
Πολιτικές Marketing στο διεθνές εμπόριο: Η περίπτωση των ελληνικών αγροτικών προϊόντων
Creators: name: Λαμπρινίδου, Φανή Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Διεθνές marketing αγροτικών προϊόντων
Διεθνές εμπόριο αγροτικών προϊόντων
Ελληνικές εξαγωγές αγροτικών προϊόντων
International marketing of agricultural products
International trade of agricultural products
Greek exports of agricultural products

description: Το διεθνές marketing απαρτίζεται από το σύνολο των διαχειριστικών λειτουργιών του marketing, σε διεθνή όμως κλίμακα, επικεντρωμένο στο διεθνή καταναλωτή. Αυτό συνεπάγεται μια απαιτητικότερη εκτέλεση των δραστηριοτήτων του και ενέχει μεγαλύτερο επιχειρηματικό κίνδυνο. Η απόλυτη κατανόηση του τρόπου λειτουργίας του διεθνούς marketing καθώς και η ορθή χρήση των εργαλείων του, κρίνεται πλέον ως μονόδρομος για την επιβίωση, πρωτίστως μιας οικονομίας που βρίσκεται σε ύφεση, όπως η ελληνική. Κάθε επιχείρηση με εξαγωγικές βλέψεις, οφείλει να σχεδιάσει ένα εξαγωγικό πλάνο marketing, το οποίο περιλαμβάνει τον καθορισμό στόχου, τη διάγνωση επιπέδου εξαγωγικής ετοιμότητας, την ανάλυση του προϊόντος και της αγοράς-στόχου, τη στρατηγική εισόδου στην αγορά, το μίγμα marketing και το τελικό σχέδιο δράσης. Για την ορθή σύνταξη ενός τέτοιου εξαγωγικού πλάνου, η επιχείρηση θα πρέπει να μελετήσει εις βάθος κυρίως, το πολιτιστικό, το κοινωνικό, το πολιτικό και το οικονομικό περιβάλλον της χώρας στην οποία σκοπεύει να επεκταθεί. Τέλος, θα πρέπει να έχει γνώση των υπάρχοντων ελληνικών εξαγωγών του προϊόντος που θα εξάγει
description: International marketing is composed by all the management functions of local marketing, but on a global scale and it is focusing on the international consumer. This implies a more demanding performance of its activities and involves a greater risk. The complete understanding of the international marketing mode and the proper use of its tools is considered to be one of the more important ways for survival, primarily in an economy in recession such as the Greek one. Any company with export aspirations must devise an export marketing plan, which includes the target setting, a diagnosis of the exporting preparedness level, an analysis of the product and the target market, the market entry strategy, the marketing mix and the final action plan. In order to create a successful export plan, the company will need to investigate in depth the cultural, social, political and economic environment of the country in which it intends to expand. Finally, the company must be aware of the existing Greek exports of the product to be exported
Scintillation yield of liquid xenon at room temperature
Creators: name: Ueshima, K.
name: Abe, K.
name: Iida, T.
name: Ikeda, M.
name: Kobayashi, K.
name: Koshio, Y.
name: Minamino, A.
name: Miura, M.
name: Moriyama, S.
name: Nakahata, M.
name: Nakajima, Y.
name: Ogawa, H.
name: Sekiya, H.
name: Shiozawa, M.
name: Suzuki, Y.
name: Takeda, A.
name: Takeuchi, Y.
name: Yamashita, M.
name: Kaneyuki, K.
name: Doke, T.
name: Ebizuka, Y.
name: Kikuchi, J.
name: Ota, A.
name: Suzuki, S.
name: Takahashi, T.
name: Hagiwara, H.
name: Kamei, T.
name: Miyamoto, K.
name: Nagase, T.
name: Nakamura, S.
name: Ozaki, Y.
name: Sato, T.
name: Fukuda, Y.
name: Sato, T.
name: Nishijima, K.
name: Sakurai, M.
name: Maruyama, T.
name: Motoki, D.
name: Itow, Y.
name: Ohsumi, H.
name: Tasaka, S.
name: Kim, S. B.
name: Kim, Y. D.
name: Lee, J. I.
name: Moon, S. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The intensity of scintillation light emission from liquid xenon at room temperature was measured. The scintillation light yield at 1 deg. was measured to be 0.64 +/- 0.02 (stat.) +/- 0.06 (sys.) of that at -100 deg. Using the reported light yield at -100 deg. (46 photons/keV), the measured light yield at 1 deg. corresponds to 29 photons/keV. This result shows that liquid xenon scintillator gives high light yield even at room temperature.
description: 16pages,12figures
การพัฒนารูปแบบตัวอักษรไทยเพื่อสื่อสารในสังคมพหุวัฒนธรรมของสามจังหวัดชายแดนใต้
Creators: name: ชนกิตติ์ ธนะสุข, เกรียงศักดิ์ เขียวมั่ง, สุชาติ เถาทอง
Publisher: name: สำนักวิทยบริการ มหาวิทยาลัยสงขลานครินทร์ วิทยาเขตปัตตานี
Year: 2019
Subjects: รูปแบบตัวอักษร, กราฟิก, วัฒนธรรม, วัฒนธรรมทางสายตา, สามจังหวัดชายแดนใต้, character forms, graphics, culture, visual culture, three southern border provinces

description: วารสารวิทยบริการ มหาวิทยาลัยสงขลานครินทร์, 30, 2, 1-10
SU(4) spin waves in the $ν=\pm1$ quantum Hall ferromagnet in graphene
Creators: name: Atteia, Jonathan
name: Goerbig, Mark Oliver
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study generalized spin waves in graphene under a strong magnetic field when the Landau-level filling factor is $ν=\pm 1$. In this case, the ground state is a particular SU(4) quantum Hall ferromagnet, in which not only the physical spin is fully polarized but also the pseudo-spin associated with the valley degree of freedom. The nature of the ground state and the spin-valley polarization depend on explicit symmetry breaking terms that are also reflected in the generalised spin-wave spectrum. In addition to pure spin waves, one encounters valley-pseudo-spin waves as well as more exotic entanglement waves that have a mixed spin-valley character. Most saliently, the SU(4) symmetry-breaking terms do not only yield gaps in the spectra, but under certain circumstances, namely in the case of residual ground-state symmetries, render the originally quadratic (in the wave vector) spin-wave dispersion linear.
Where are the z=4 Lyman Break Galaxies? Results from Conditional Luminosity Function Models of Luminosity-dependent Correlation Functions
Creators: name: Cooray, Asantha
name: Ouchi, Masami
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using the conditional luminosity function (CLF) -- the luminosity distribution of galaxies in a dark matter halo -- as a way to model galaxy statistics, we study how z=4 Lyman Break Galaxies (LBGs) are distributed in dark matter halos. For this purpose, we measure luminosity-dependent clustering of LBGs in the Subaru/XMM-Newton Deep Field by separating a sample of 16,920 galaxies to three magnitude bins in i'-band between 24.5 and 27.5. Our models fits to data show a possible trend for more luminous galaxies to appear as satellites in more massive halos. The satellite fraction of galaxies at z=4 in these magnitude bins is 0.13 to 0.3, 0.09 to 0.22, and 0.03 to 0.14, respectively, where the 1 sigma ranges account for differences coming from two different estimates of the z=4 LF from the literature. To jointly explain the LF and the large-scale linear bias factor of z=4 LBGs as a function of rest-UV luminosity requires central galaxies to be brighter in UV at z =4 than present-day galaxies in same dark matter mass halos. Moreover, UV luminosity of central galaxies in halos with total mass greater than roughly 10^{12} M_sun must decrease from z=4 to today by an amount more than the luminosity change for galaxies in halos below this mass. This mass-dependent luminosity evolution is preferred at more than 3 sigma confidence level compared to a pure-luminosity evolution scenario where all galaxies decrease in luminosity by the same amount from z=4 to today. The scenario preferred by the data is consistent with the ``down-sizing'' picture of galaxy evolution.
description: 13 pages, 9 figures; accepted for publication in Mon. Not. Roy. Astron. Soc.; low resolution figures submitted here. A pdf file with high resolution figures available at http://www.cooray.org/Cooray-Ouchi.pdf
Binary Mixtures of Locally Coupled Mobile Oscillators
Creators: name: Paulo, Gonçalo
name: Tasinkevych, Mykola
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study synchronization dynamics in binary mixtures of locally coupled Kuramoto oscillators which perform Brownian motion in a two-dimensional box. We introduce two models, where in model $\cal I$ there are two type of oscillators, say $\cal A$ and $\cal B$, and any two similar oscillators tend to synchronize their phases, while any two dissimilar ones tend to be out of phase. In model $\cal J$, in contrast, the oscillators in subpopulation $\cal A$ behave as in model $\cal I$, while the oscillators in subpopulation $\cal B$ tend to be out of phase with all the others. In the real space all the oscillators in both models interact via a soft-core repulsive potential. Both subpopulations of model $\cal I$ and subpopulation $\cal A$ of model $\cal J$, by their own, exhibit a phase coherent attractor in a certain region of model parameters. The approach to the attractor, after an initial transient regime, is exponential with some characteristic synchronization time scale $τ$. Numerical analysis reveals that the attractors of the two subpopulations survive within model $\cal I$, regardless of the composition of the mixture $ϕ$ and the strength of the cross-population negative coupling constant $H$, and that $τ$ sensitively depends on $ϕ$, $H$ and the packing fraction. In particular, the ability of the oscillators to move and exchange neighbours can significantly decrease $τ$. In contrast, model $\cal J$ predicts suppression of the synchronized state in subpopulation $\cal A$ and emergence of the coherent attractor in the "contrarians" subpopulation $\cal B$ for strong and weak cross-population coupling, respectively.
description: 11 pages, 10 figures
High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State
Creators: name: Xia, Jing
name: Yoshiteru, Maeno
name: Beyersdorf, Peter T.
name: Fejer, M. M.
name: Kapitulnik, Aharon
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Polar Kerr effect in the spin-triplet superconductor Sr2RuO4 was measured with high precision using a Sagnac interferometer with a zero-area Sagnac loop. We observed non-zero Kerr rotations as big as 65 nanorad appearing below Tc in large domains. Our results imply a broken time reversal symmetry state in the superconducting state of Sr2RuO4, similar to He3-A.
Temperature profiles of a representative sample of nearby X-ray galaxy clusters
Creators: name: Pratt, G. W.
name: Boehringer, H.
name: Croston, J. H.
name: Arnaud, M.
name: Borgani, S.
name: Finoguenov, A.
name: Temple, R. F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A study of the structural and scaling properties of the temperature distribution of the hot, X-ray emitting intra-cluster medium of galaxy clusters, and its dependence on dynamical state, can give insights into the physical processes governing the formation and evolution of structure. We analyse the X-ray temperature profiles from XMM-Newton observations of 15 nearby (z < 0.2) clusters, drawn from a statistically representative sample. The clusters cover a temperature range from 2.5 keV to 8.5 keV, and present a variety of X-ray morphologies. We derive accurate projected temperature profiles to ~ 0.5 R_200, and compare structural properties (outer slope, presence of cooling core) with a quantitative measure of the X-ray morphology as expressed by power ratios. We also compare the results to recent cosmological numerical simulations. Once the temperature profiles are scaled by an average cluster temperature (excluding the central region) and the estimated virial radius, the profiles generally decline in the region 0.1 R_200 < R < 0.5 R_200. The central regions show the largest scatter, attributable mostly to the presence of cool core clusters. There is good agreement with numerical simulations outside the core regions. We find no obvious correlations between power ratio and outer profile slope. There may however be a weak trend with the existence of a cool core, in the sense that clusters with a central temperature decrement appear to be slightly more regular. The present results lend further evidence to indicate that clusters are a regular population, at least outside the core region.
description: 19 pages, 24 figures; to appear in A&A
A statistical model to calculate inclusive hadronic cross sections
Creators: name: Balassa, Gábor
name: Wolf, György
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Hadronic cross sections are important ingredients in many of the ongoing research methods in high-energy nuclear physics, and it is always important to measure and/or calculate the probabilities of different types of reactions. In heavy-ion transport simulations at a few GeV energies, these hadronic cross sections are essential and so far mostly the exclusive processes are used, however, if one interested in total production rates the inclusive cross sections are also necessary to know. In this paper, we introduce a statistical-based method, which is able to give good estimates to exclusive and inclusive cross sections as well in the energy range of a few GeV. The method and its estimates for not well-known cross sections, will be used in a Boltzmann-Uehling-Uhlenbeck (BUU) type off-shell transport code to explain charmonium and bottomonium mass shifts in heavy-ion collisions.
Μη γραμμικός προβλεπτικός έλεγχος για την ισορρόπηση ενός διπλού ανάστροφου εκκρεμούς
Creators: name: Πετάβρατζης, Ελευθέριος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Προβλεπτικός έλεγχος
δράση ελέγχου
διπλό ανάστροφο εκκρεμές
Predictive Control
control action
double inverted pendulum

description: Στο πλαίσιο [1] της παρούσας διπλωματικής εργασίας θα ασχοληθούμε με ένα τυπικό πρόβλημα βέλτιστου ελέγχου. Συγκεκριμένα θα μελετήσουμε την συμπεριφορά του διπλού ανάστροφου εκκρεμούς .Ένα τέτοιο εκρεμμές αποτελεί κλασσικό μη γραμμικό σύστημα ευρείας κλίμακας. Στόχος της εργασίας είναι η εύρεση λύσης για συστήματα μη-γραμμικού προβλεπτικού ελέγχου σε πραγματικό χρόνο. Για το σκοπό αυτό θα κατασκευαστεί ένας προβλεπτικός ελεγκτής (NMPC) ο οποίος θα μπορεί να επιλύει on time το πρόβλημα ελέγχου. Στη ξένη βιβλιογραφία έχει μελετηθεί εκτενώς το σύστημα αλλά κυρίως με γραμμικές μεθόδους βελτιστοποίησης π.χ. LQR [8]. Το πρόβλημα που μελετάμε αφορά το swing up (ανόρθωση) 2 εκκρεμών σε αμάξωμα από τυχαία αρχική θέση. Η λύση του προβλήματος προϋποθέτει την χρήση της ορθογώνιας ταξιθεσίας σε πεπερασμένα στοιχεία (OCFE). Για την λύση των διαφορικών εξισώσεων χρησιμοποιήθηκε ο επιλυτής (DASSL) και ως κύρια γλώσσα προγραμματισμού η C. Ωστόσο για να μπορέσουμε να αναπτύξουμε το γραμμικό προβλεπτικό ελεγκτή μας, θα χρησιμοποιήσουμε τις συναρτήσεις Laguerre [15]. Θα μελετηθούν εκτενώς η χρήση τους καθότι αποτελούν το σημαντικότερο κομμάτι της διπλωματικής μας. Στη συνέχεια παραθέτουμε τις γραφικές παραστάσεις που μας δείχνουν τη συμπεριφορά των γωνιών των εκκρεμών και εν τέλει εξάγουμε και μερικά χρήσιμα συμπεράσματα με αφορμή την συμπεριφορά τους
description: In this master thesis we will study a typical Optimal Control problem. Specifically we will study the behavior of a double inverted pendulum. This pendulum is a large scale nonlinear system. The main target is to find a solution for nonlinear model predictive control systems in real time. For this purpose we will construct a predictive controller (NMPC) who will solve on time the control problem. In our problem we will study the swing up of 2 pendulums in a cart from a random position. The solution requires the use of Orthogonal Collocation of Finite elements (OCFE). For the solution of the differential equations we use the DASSL solver and the programming language that we write the code was C. In order to construct the predictive controller we will use Laguerre functions. We will extensively study their use as they are the most important part of our thesis. Finally we will demonstrate the graphs that they will show us how the angles of the two pendulums behave. Also from these graphs we will extract some useful conclusions
Additional file 3 of PPFIA4 promotes castration-resistant prostate cancer by enhancing mitochondrial metabolism through MTHFD2
Creators: name: Zhao, Ru
name: Feng, Tingting
name: Gao, Lin
name: Sun, Feifei
name: Zhou, Qianqian
name: Wang, Xin
name: Liu, Junmei
name: Zhang, Wenbo
name: Wang, Meng
name: Xiong, Xueting
name: Jia, Wenqiao
name: Chen, Weiwen
name: Wang, Lin
name: Han, Bo
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Pharmacology
subject: Cancer
subject: Computational Biology

description: Additional file 3: Supplementary Figures and Legends. Figure S1. PPFIA4 does not alter expression of AR and its target genes in PCa cells. Figure S2. PPFIA4 promotes PCa cell growth in vitro. Figure S3. Androgen deprivation induces mitochondrial dysfunction. Figure S4. The increased expression of several key genes involving one-carbon metabolism in CRPC. Figure S5. MTHFD2 overexpression promotes CRPC cell proliferation and is associated with poor prognosis in PCa patients. Figure S6. PPFIA4 exerts no significant effect on MTHFD2 expression. Figure S7. DS18561882 significantly suppresses PCa cell growth in vitro and in vivo.
Αξιολόγηση της Συμβολαιακής Γεωργίας και προοπτικές ανάπτυξης της στην Ελλάδα
Creators: name: Κόκοτα, Δήμητρα Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Συμβολαιακή Γεωργία-Ελλάδα-Προοπτικές ανάπτυξης
Contract Farming-Greece-Development prospects

description: Αντικείμενο της παρούσης διατριβής αποτελεί ο θεσμός της Συμβολαιακής Γεωργίας, ενώ ο κύριος σκοπός της είναι η αξιολόγηση της Συμβολαιακής Γεωργίας και η διερεύνηση των προοπτικών ανάπτυξής της συγκεκριμένα στην Ελλάδα. Από την θεωρητική ανασκόπηση που πραγματοποιήθηκε, συμπεραίνουμε ότι η Συμβολαιακή Γεωργία, αν και παρουσιάσθηκε στην Ελλάδα με μια σχετική καθυστέρηση σε σχέση με τις υπόλοιπες αναπτυγμένες χώρες του κόσμου, βρίσκει σήμερα τις κατάλληλες συνθήκες για να αναπτυχθεί. Η συμβολή των τραπεζικών ιδρυμάτων αποτελεί επίσης, μια σημαντική κίνηση για την ανάπτυξη της Συμβολαιακής Γεωργίας στη χώρα, η οποία σε μια περίοδο με προβλήματα ρευστότητας, αποτελεί ίσως τη μοναδική λύση για τους παραγωγούς της χώρας. Αν και τα αποτελέσματα από τις πρωτοβουλίες αυτές δεν είναι ακόμα εμφανή, θα πρέπει ωστόσο να είμαστε ιδιαίτερα επιφυλακτικοί, καθώς τα διεθνή παραδείγματα δείχνουν ότι σε πολλές περιπτώσεις οι πρωτοβουλίες αυτές έχουν ως αποτέλεσμα να αυξάνεται ο κίνδυνος απώλειας της αυτονομίας των παραγωγών. Τα αποτελέσματα της έρευνας που διεξήχθη, σε συνδυασμό με την ανάλυση S.W.O.T. δείχνουν ότι υπάρχουν σημαντικές προοπτικές ανάπτυξης της Συμβολαιακής Γεωργίας στην Ελλάδα, ενώ φαίνεται ότι ο θεσμός έχει μεγάλη αποδοχή από όλους τους συμβαλλόμενους
description: The subject of this paper is to evaluate contract farming and examine its development prospects in Greece. Although contract farming was presented in Greece with a relative delay, compared to other developed countries in the world, nowadays, it seems to be developing. Of course, the contribution of banking institutions is an important movement for contract farming development in the country, which perhaps, is the only option for local producers in a period with liquidity problems. Although the results of these initiatives are still not visible, we should be particularly cautious, as international examples indicate that there is an increased risk of autonomy loss for the producers. However, from the research we conducted and the use of the S.W.O.T. analysis, we found that there are significant prospects for contract farming in Greece, while it appears that it has wide acceptance by all contracting parties
Additional file 2 of Characteristics of different asthma phenotypes associated with cough: a prospective, multicenter survey in China
Creators: name: Zhou, Jianmeng
name: Yi, Fang
name: Wu, Feng
name: Xu, Pusheng
name: Chen, Meihua
name: Shen, Huahao
name: Lin, Lin
name: Zhang, Yunhui
name: Li, Suyun
name: Wu, Changgui
name: Yuan, Yadong
name: Wang, Gang
name: Ye, Xianwei
name: Zhang, Ping
name: Tang, Huaping
name: Ma, Qianli
name: Huang, Lanqing
name: Qiu, Zhongmin
name: Deng, Haiyan
name: Qiu, Chen
name: Shi, Guochao
name: Pan, Jiayu
name: Luo, Wei
name: Chung, Kian Fan
name: Zhong, Nanshan
name: Lai, Kefang
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2. Case Report Form of the study.
Particle acceleration and radiation reaction in strong spherical electromagnetic waves
Creators: name: Pétri, Jérôme
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Strongly magnetized and fast rotating neutron stars are known to be efficient particle accelerators within their magnetosphere and wind. They are suspected to accelerate leptons, protons and maybe ions to extreme relativistic regimes where the radiation reaction significantly feeds back to their motion. In the vicinity of neutron stars, magnetic field strengths are close to the critical value of $B_{\rm c} \sim 4.4\times10^9$T and particle Lorentz factors of the order $γ\sim 10^9$ are expected. In this paper, we investigate the acceleration and radiation reaction feedback in the pulsar wind zone where a large amplitude low frequency electromagnetic wave is launched starting from the light-cylinder. We design a semi-analytical code solving exactly the particle equation of motion including radiation reaction in the Landau-Lifshits approximation for a null-like electromagnetic wave of arbitrary strength parameter and elliptical polarization. Under conventional pulsar conditions, asymptotic Lorentz factor as high as $10^8-10^9$ are reached at large distances from the neutron star. However, we demonstrate that in the wind zone, within the spherical wave approximation, radiation reaction feedback remains negligible.
description: Accepted for publication in Monthly Notices of the Royal Astronomical Society
A model of persistent breaking of discrete symmetry
Creators: name: Chai, Noam
name: Dymarsky, Anatoly
name: Smolkin, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show there exist UV-complete field-theoretic models in general dimension, including $2+1$, with the spontaneous breaking of a global symmetry, which persists to the arbitrarily high temperatures. Our example is a conformal vector model with the $O(N)\times \mathbb{Z}_2$ symmetry at zero temperature. Using conformal perturbation theory we establish $\mathbb{Z}_2$ symmetry is broken at finite temperature for $N>10$. Similar to recent constructions, in the infinite $N$ limit our model has a non-trivial conformal manifold, a moduli space of vacua, which gets deformed at finite temperature. Furthermore, in this regime the model admits a persistent breaking of $O(N)$ in $2+1$ dimensions, therefore providing another example where the Coleman-Hohenberg-Mermin-Wagner theorem can be bypassed.
description: corrections and references added
Hereditary properties of ordered graphs
Creators: name: Balogh, József
name: Bollobás, Béla
name: Morris, Robert
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: An ordered graph is a graph together with a linear order on its vertices. A hereditary property of ordered graphs is a collection of ordered graphs closed under taking induced ordered subgraphs. If P is a property of ordered graphs, then the function which counts the number of ordered graphs in P with exactly n vertices is called the speed of P. In this paper we determine the possible speeds of a hereditary property of ordered graphs, up to the speed 2^(n-1). In particular, we prove that there exists a jump from polynomial speed to speed F(n), the Fibonacci numbers, and that there exists an infinite sequence of subsequent jumps, from p(n)F(n,k) to F(n,k+1) (where p(n) is a polynomial and F(n,k) are the generalized Fibonacci numbers) converging to 2^(n-1). Our results generalize a theorem of Kaiser and Klazar, who proved that the same jumps occur for hereditary properties of permutations.
description: 39 pgs, 1 figure
Regional and Sectoral Structures and Their Dynamics of Chinese Economy: A Network Perspective from Multi-Regional Input-Output Tables
Creators: name: Wang, Tao
name: Xiao, Shiying
name: Yan, Jun
name: Zhang, Panpan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: General Economics (econ.GN)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: A multi-regional input-output table (MRIOT) containing the transactions among the region-sectors in an economy defines a weighted and directed network. Using network analysis tools, we analyze the regional and sectoral structure of the Chinese economy and their temporal dynamics from 2007 to 2012 via the MRIOTs of China. Global analyses are done with network topology measures. Growth-driving province-sector clusters are identified with community detection methods. Influential province-sectors are ranked by weighted PageRank scores. The results revealed a few interesting and telling insights. The level of inter-province-sector activities increased with the rapid growth of the national economy, but not as fast as that of intra-province economic activities. Regional community structures were deeply associated with geographical factors. The community heterogeneity across the regions was high and the regional fragmentation increased during the study period. Quantified metrics assessing the relative importance of the province-sectors in the national economy echo the national and regional economic development policies to a certain extent.
Chemical oscillators synchronized via an active oscillating medium: dynamics and phase approximation model
Creators: name: García-Selfa, David
name: Ghoshal, Gourab
name: Bick, Christian
name: Pérez-Mercader, Juan
name: Muñuzuri, Alberto P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Different types of synchronization states are found when non-linear chemical oscillators are embedded into an active medium that interconnects the oscillators but also contributes to the system dynamics. Using different theoretical tools, we approach this problem in order to describe the transition between two such synchronized states. Bifurcation and continuation analysis provide a full description of the parameter space. Phase approximation modeling allows the calculation of the oscillator periods and the bifurcation point.
description: 10 pages, 6 figures
Exploration and preference satisfaction trade-off in reward-free learning
Creators: name: Sajid, Noor
name: Tigas, Panagiotis
name: Zakharov, Alexey
name: Fountas, Zafeirios
name: Friston, Karl
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Biological agents have meaningful interactions with their environment despite the absence of immediate reward signals. In such instances, the agent can learn preferred modes of behaviour that lead to predictable states -- necessary for survival. In this paper, we pursue the notion that this learnt behaviour can be a consequence of reward-free preference learning that ensures an appropriate trade-off between exploration and preference satisfaction. For this, we introduce a model-based Bayesian agent equipped with a preference learning mechanism (pepper) using conjugate priors. These conjugate priors are used to augment the expected free energy planner for learning preferences over states (or outcomes) across time. Importantly, our approach enables the agent to learn preferences that encourage adaptive behaviour at test time. We illustrate this in the OpenAI Gym FrozenLake and the 3D mini-world environments -- with and without volatility. Given a constant environment, these agents learn confident (i.e., precise) preferences and act to satisfy them. Conversely, in a volatile setting, perpetual preference uncertainty maintains exploratory behaviour. Our experiments suggest that learnable (reward-free) preferences entail a trade-off between exploration and preference satisfaction. Pepper offers a straightforward framework suitable for designing adaptive agents when reward functions cannot be predefined as in real environments.
description: 23 pages, 15 figures
Light absorbing properties of particles extracted from snow samples
Creators: name: Linke, Claudia
name: Ibrahim, Inas
name: Waitz, Fritz
name: Kiselev, Alexei
name: Rehm, Till
name: Leisner, Thomas
name: Schaiter, Martin
Publisher: name: Karlsruhe
Year: 2019

description: Although BC is the dominating absorbing component in the atmosphere, there is evidence of numerous other aerosol components which are able to contribute to the aerosol light absorption. Such non-BC particles include mineral dust, volcanic ash, brown carbon as well as biological debris. Sooner or later different physical processes remove these airborne particles from the atmosphere and deposit them on the ground. If they are deposited on snow or ice surfaces these particles might induce melting processes by the absorption of solar radiation. Because snow is the most reflective natural surface on earth, already small amounts of absorptive impurities can significantly reduce the surface albedo. The contribution of the albedo reduction on the radiative balance of the atmosphere is usually assessed based on the mass concentration of refractory BC deposited in the snow. Ignoring the absorption contribution of the non-BC aerosol components might result in an underestimation of the albedo reduction. Therefore, the knowledge of the visible absorption coefficients of aerosol particles deposited in snow and ice, is essential for a realistic evaluation of the albedo effect on regional and global climate. To specify the absorbing properties of particles trapped in snow samples, we combined photo acoustic absorption spectroscopy with single particle black carbon mass analysis using a Single Particle Soot Photometer (SP2). In this way, the aerosol absorption coefficients in the visible spectral range and the refractory black carbon mass could be simultaneously derived. This type of analysis is quite challenging because of the low particle mass concentrations typically present in natural snow samples. In a first case study we used a set of snow samples from the Environmental Research Station (UFS) Zugspitze. Our results show significantly enhanced light absorption of the particles released from the snow samples compared to the particle absorption that can be linked to the refractory black carbon mass in the snow. Further analyses revealed a substantial portion of biological material within the snow that could be cause for the observed additional aerosol absorption.
Homicide growth rate in Brazil, 1998 to 2017: standard error of the mean by the jackknife method.
Creators: name: Raimondi, Ana Carolina
name: Raimondi, Antonio Marcos
Publisher: name: F1000 Research Limited
Year: 2019

description: Homicides are a public health problem in Brazil, with severe social and economic costs. Homicide rate is a thermometer of the violence broader context. There are several studies about Brazilian homicide temporal series and their patterns. However, there are no works with a major focus in the ratio between neighboring years. In this present investigation, the standard error of the mean was estimated by resampling “Jackknife” method. It is a simple nonparametric method and without complex analytic assumptions. Thus, it is applicable for small or complex samples. Therefore, the Jackknife estimations are robust, reliable and obtained with low computational cost. Based on abovementioned, the aim of this study is establish an estimate of the standard error of the mean for homicide rate between consecutive years, by Jackknife method, in Brazil, during 1998 - 2017.