cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Solutions of the bosonic master-field equation from a supersymmetric matrix model
Creators: name: Klinkhamer, F. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been argued that the bosonic large-$N$ master field of the IIB matrix model can give rise to an emergent classical spacetime. In a recent paper, we have obtained solutions of a simplified bosonic master-field equation from a related matrix model. In this simplified equation, the effects of dynamic fermions were removed. We now consider the full bosonic master-field equation from a related supersymmetric matrix model for dimensionality $D=3$ and matrix size $N=3$. In this last equation, the effects of dynamic fermions are included. With an explicit realization of the random constants entering this algebraic equation, we establish the existence of nontrivial solutions. The small matrix size, however, does not allow us to make a definitive statement as to the appearance of a diagonal/band-diagonal structure in the obtained matrices.
description: 18 pages, v5: published version
Guessing based on length functions
Creators: name: Sundaresan, Rajesh
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: A guessing wiretapper's performance on a Shannon cipher system is analyzed for a source with memory. Close relationships between guessing functions and length functions are first established. Subsequently, asymptotically optimal encryption and attack strategies are identified and their performances analyzed for sources with memory. The performance metrics are exponents of guessing moments and probability of large deviations. The metrics are then characterized for unifilar sources. Universal asymptotically optimal encryption and attack strategies are also identified for unifilar sources. Guessing in the increasing order of Lempel-Ziv coding lengths is proposed for finite-state sources, and shown to be asymptotically optimal. Finally, competitive optimality properties of guessing in the increasing order of description lengths and Lempel-Ziv coding lengths are demonstrated.
description: 16 pages, Submitted to IEEE Transactions on Information Theory, Special issue on Information Theoretic Security, Simplified proof of Proposition 2
Enhanced Absorption in thin and ultrathin silicon films by 3D photonic band gap back reflectors
Creators: name: Sharma, Devashish
name: Hasan, Shakeeb B.
name: Saive, Rebecca
name: van der Vegt, J. J. W.
name: Vos, Willem L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Since thin-film silicon solar cells have limited optical absorption, we explore the effect of a nanostructured back reflector to recycle the unabsorbed light. As a back reflector we investigate a 3D photonic band gap crystal made from silicon that is readily integrated with the thin films. We numerically obtain the optical properties by solving the 3D time-harmonic Maxwell equations using the finite-element method, and model silicon with experimentally determined optical constants. The absorption enhancement relevant for photovoltaics is obtained by weighting the absorption spectra with the AM 1.5 standard solar spectrum. We study thin films either thicker ($L_{Si} = 2400$ nm) or much thinner ($L_{Si} = 80$ nm) than the wavelength of light. At $L_{Si} = 2400$ nm, the 3D photonic band gap crystal enhances the spectrally averaged ($λ= 680$ nm to $880$ nm) silicon absorption by $2.22$x (s-pol.) to $2.45$x (p-pol.), which exceeds the enhancement of a perfect metal back reflector ($1.47$ to $1.56$x). The absorption is enhanced by the (i) broadband angle and polarization-independent reflectivity in the 3D photonic band gap, and (ii) the excitation of many guided modes in the film by the crystal's surface diffraction leading to enhanced path lengths. At $L_{Si} = 80$ nm, the photonic crystal back reflector yields a striking average absorption enhancement of $9.15$x, much more than $0.83$x for a perfect metal, which is due to a remarkable guided mode confined within the combined thickness of the thin film and the photonic crystal's Bragg attenuation length. The broad bandwidth of the 3D photonic band gap leads to the back reflector's Bragg attenuation length being much shorter than the silicon absorption length. Consequently, light is confined inside the thin film and the absorption enhancements are not due to the additional thickness of the photonic crystal back reflector.
description: 23 pages, 15 figures
A Parallel Algorithm for the 2-Dimensional Maxima Problem using nCUBE Processor Configuration
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 100699 Computer Hardware not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 10399 Numerical and Computational Mathematics not elsewhere classified
subject: FOS: Mathematics

description: In this paper, a parallel algorithm for the two dimensional maxima problem is analyzed and efficiently implemented on hypercube computers. We are interested in how parallel algorithms can be transformed into parallel programs and what running time can be achieved on an nCUBE in terms of the number of processors.
In the investigation of the second problem, we separated the two aspects of the algorithm: the sort and the parallel prefix computation, and made several runs on different dimensional cubs to determine the 2D maxima for K points on N machine nodes, where K ≥ N. Also we show the results for run time and the analysis for justifying the conclusions.
Football fever: goal distributions and non-Gaussian statistics
Creators: name: Bittner, Elmar
name: Nussbaumer, Andreas
name: Janke, Wolfhard
name: Weigel, Martin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Analyzing football score data with statistical techniques, we investigate how the not purely random, but highly co-operative nature of the game is reflected in averaged properties such as the probability distributions of scored goals for the home and away teams. As it turns out, especially the tails of the distributions are not well described by the Poissonian or binomial model resulting from the assumption of uncorrelated random events. Instead, a good effective description of the data is provided by less basic distributions such as the negative binomial one or the probability densities of extreme value statistics. To understand this behavior from a microscopical point of view, however, no waiting time problem or extremal process need be invoked. Instead, modifying the Bernoulli random process underlying the Poissonian model to include a simple component of self-affirmation seems to describe the data surprisingly well and allows to understand the observed deviation from Gaussian statistics. The phenomenological distributions used before can be understood as special cases within this framework. We analyzed historical football score data from many leagues in Europe as well as from international tournaments, including data from all past tournaments of the ``FIFA World Cup'' series, and found the proposed models to be applicable rather universally. In particular, here we analyse the results of the German women's premier football league and consider the two separate German men's premier leagues in the East and West during the cold war times and the unified league after 1990 to see how scoring in football and the component of self-affirmation depend on cultural and political circumstances.
description: 24 pages, 7 figures
Phenomenology of fermion dark matter as neutrino mass mediator with gauged B-L
Creators: name: Alvarado, Carlos
name: Bonilla, Cesar
name: Leite, Julio
name: Valle, José W. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We analyze a model with unbroken B-L gauge symmetry where neutrino masses are generated at one loop, after spontaneous breaking of a global U(1) symmetry. These symmetries ensure dark matter stability and the Diracness of neutrinos. Within this context, we examine fermionic dark matter. Consistency between the required neutrino mass and the observed relic abundance indicates dark matter masses and couplings within the reach of direct detection experiments.
description: 19 pages, 9 figures. References added, typos corrected. Matches published version in PLB
Γεωτεχνική ανάλυση ευστάθειας επιφανειακών και υπόγειων εκσκαφών εκμετάλλευσης λιγνίτη στο Προσήλιο Κοζάνης
Creators: name: Τζαλαμαρίας, Ιωάννης Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Γεωτεχνική ευστάθεια
Μέθοδος θαλάμων και στύλων
Λιγνίτης
Geotechnical stability
Rooms and pillars method
Lignite

description: Το φαινόμενο της υπόγειας εξόρυξης σε λιγνιτικά κοιτάσματα σπανίζει, λόγω των ασθενών γεωλογικών σχηματισμών που τα περιβάλλουν και καθιστούν δύσκολο τόσο το σχεδιασμό, όσο και την κατασκευή τους. Η παρούσα εργασία επικεντρώθηκε στην γεωτεχνική ευστάθεια μιας υπόγειας εκμετάλλευσης με την μέθοδο θαλάμων και στύλων η οποία πρόκειται να συνδυαστεί με την επιφανειακή εκμετάλλευση που πραγματοποιείται εδω και αρκετά χρόνια. Ακόμα εξετάζεται η ευστάθεια του τεχνητού πρανούς της υπαίθριας εκμετάλλευσης στο τμήμα που θα διανοιχθεί ο υπόγειος χώρος. Πιο συγκεκριμένα αξιολογούνται οι ερευνητικές γεωτρήσεις και δημιουργούνται γεωλογικές τομές στον υπο μελέτη χώρο. Αφού αξιολογηθούν τα αποτελέσματα των εργαστηριακών δοκιμών, προσδιορίζεται η βέλτιστη γεωμετρία του στύλου που θα αναλάβει με επιτυχία της γεωστατικές τάσεις. Ακόμα προσδιορίζεται ποιοτικά αλλά και ποσοτικά το κατάλληλο σύστημα για την υποστήριξη των υπόγειων στοών του έργου. Έχοντας ως βασικό στόχο την μηχανική συμπεριφορά των στοών και του προτεινόμενου συστήματος υποστήριξης τους, παρουσιάζονται αναλύσεις από δισδιάστατα αλλά και τρισδιάστατα αριθμητικά μοντέλα, προερχόμενα από λογισμικά επίλυσης πεπερασμένων στοιχείων της Rocscience. Τέλος, με τη βοήθεια του λογισμικού Slide της ίδιας εταιρείας πραγματοποιείται ο έλεγχος της ευστάθειας του τεχνητού πρανούς που βρίσκεται πάνω από το μέτωπο εργασιών της υπόγειας εξόρυξης.
description: The phenomenon of underground mining in lignite deposits is rare due to the weak geological formations that surround them and make both design and construction difficult. This thesis has focused on the geotechnical stability of an underground exploitation using the rooms and pillars method, which is to be combined with the surface exploitation that has been taking place for several years. In addition, the stability of the artificial slopes of open-air exploitation is examined in the section which will be excavated. In particular, exploratory drillings are evaluated and geological segments are created in the field being studied. After the results of the laboratory tests have been evaluated, the optimal geometry of the pole will be determined which will successfully undertake geostationary trends. Furthermore, the appropriate system for the support of the underground galleries of the project is defined qualitatively and quantitatively. Having as their main purpose the mechanical behavior of the galleries and their proposed support system, analyses are presented from two-dimensional and three-dimensional numerical models, which derived from Rocscience finite element solver software. Finally, with the help of the software of Slide of the same company, the control of the stability of the artificial slopes above the front of the underground mining is carried out.
Three-dimensional Ising model confined in low-porosity aerogels: a Monte Carlo study
Creators: name: Paredes, Ricardo
name: Vasquez, Carlos
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The influence of correlated impurities on the critical behaviour of the 3D Ising model is studied using Monte Carlo simulations. Spins are confined into the pores of simulated aerogels (diffusion limited cluster-cluster aggregation) in order to study the effect of quenched disorder on the critical behaviour of this magnetic system. Finite size scaling is used to estimate critical couplings and exponents. Long-range correlated disorder does not affect critical behavior. Asymptotic exponents differ from those of the pure 3D Ising model (3DIS), but it is impossible, with our precision, to distinguish them from the randomly diluted Ising model (RDIS).
description: 10 pages, 10 figures. Submitted to Physical Review B
Fermionic functional renormalization group for first-order phase transitions: a mean-field model
Creators: name: Gersch, R.
name: Reiss, J.
name: Honerkamp, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: First-order phase transitions in many-fermion systems are not detected in the susceptibility analysis of common renormalization-group (RG) approaches. Here we introduce a counterterm technique within the functional renormalization-group (fRG) formalism which allows access to all stable and metastable configurations. It becomes possible to study symmetry-broken states which occur through first-order transitions as well as hysteresis phenomena. For continuous transitions, the standard results are reproduced. As an example, we study discrete-symmetry breaking in a mean-field model for a commensurate charge-density wave. An additional benefit of the approach is that away from the critical temperature for the breaking of discrete symmetries large interactions can be avoided at all RG scales.
description: 17 pages, 8 figures. v2 corrects typos, adds references and a discussion of the literature
Βιολογική Γεωργία και Αειφορία
Creators: name: Ξενόπουλος, Κωνσταντίνος Εμμανουήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Βιολογική Γεωργία
Αειφορία
Βιοκαλλιεργητές
Organic Agriculture
Sustainability
Organic Farmers

description: Η παρούσα διπλωματική εργασία εκπονήθηκε στα πλαίσια της ολοκλήρωσης του Μεταπτυχιακού κύκλου Σπουδών: «Ειδίκευση στην Περιβαλλοντική Εκπαίδευση» του Τμήματος Επιστημών Προσχολικής Αγωγής και Εκπαίδευσης και του Τμήματος Βιολογίας του Αριστοτέλειου Πανεπιστημίου Θεσσαλονίκης (Α.Π.Θ.) με σκοπό να συμβάλλει στην αύξηση των ποσοστών βιολογικής καλλιέργειας στη χώρα μας για να ενισχυθεί η αειφορία του πλανήτη μας. Η έρευνα έχει ως σκοπό να υποστηρίξει τη σημασία της βιολογικής γεωργίας για τον πλανήτη μας και να αναδείξει τα προβλήματα της υπάρχουσας κατάστασης στην Ελλάδα, προκείμενου να οδηγηθούν περισσότεροι αγρότες στην υιοθέτηση οικολογικής καλλιέργειας μέσω της βιολογικής γεωργίας. Στην έρευνα πήραν μέρος 6 βιοκαλλιεργητές από το Σωματείο βιοκαλλιεργητών Βορείου Ελλάδος με τους οποίους διεξήχθησαν ημιδομημένες συνεντεύξεις για να αντληθούν τα δεδομένα. Στη συνέχεια τα δεδομένα μεταγράφηκαν και αναλύθηκαν σύμφωνα με τις αρχές της Θεματικής Ανάλυσης. Η επεξεργασία των δεδομένων έγινε με το λογισμικό «NVivo 12 Plus». Τα συμπεράσματα που προέκυψαν από την ανάλυση των δεδομένων είναι ότι η κατάσταση στη χώρα μας λειτουργεί αποτρεπτικά για έναν αγρότη να ασχοληθεί με τη βιολογική Γεωργία. Πολυεθνικές εταιρείες, Κράτος και Μ.Μ.Ε. δεν αφήνουν να αναπτυχθεί η βιολογική γεωργία, με τα αποτελέσματα στον πλανήτη μας να είναι καταστροφικά. Δίνονται προτάσεις οι οποίες εάν υιοθετηθούν και ληφθούν υπόψη από το κράτος, ίσως μπορέσει να ανατραπεί το κυρίαρχο μοντέλο της βιομηχανοποιημένης γεωργίας στη χώρα μας.
description: This Diploma Thesis was carried out within the framework of the completion of the Master Program of Studies: "Discipline in Environmental Education" of the Department of Preschool Education and the Department of Biology of the Aristotle University of Thessaloniki (A.U.TH), in order to contribute to the increase of the organic farming rates in our country, enhancing the sustainability of our planet. The research aims to support the importance of organic farming for our planet and to highlight the problems of the current situation in Greece, in order to drive more farmers into adopting organic farming. The survey involved 6 organic farmers from the Organic Farmers' Association of Northern Greece, with whom semi-structured interviews were conducted to get the data. Subsequently, the data were transcribed and analyzed according to the principles of the Thematic Analysis. The data were processed using the software “NVivo 12 Plus”. The conclusions drawn from the analysis of the data is that the situation in our country is a disincentive for a farmer to deal with organic agriculture. Multinational companies, State and Mass Media do not let organic farming to grow, with the results on our planet catastrophic. Proposals are made which, if adopted and taken into account by the state, may overturn the dominant model of industrialized agriculture in our country.
Anticipatory grief and dementia
Creators: name: Higginbotham, Susan Joan
Publisher: name: University of British Columbia
Year: 2009

description: This paper explores anticipatory grief as the experience of adult children caring for parents with Alzheimer’s, multi-infarct, and Parkinson’s dementias. Interviews were conducted with 10 daughters and two sons whose parents had been institutionalized in a special care unit of a long-term care facility. The age of the adult children ranged from 35 to 55. Forty percent of the adult children had no partner, 35 percent had no partner or sibling. All but one worked outside the home. Since onset and throughout the illness of the parent the adult children expressed a wide range of grief responses. Feelings of loss, uncertainty, and sadness predominated their experience. Their greatest loss was loss of relationship with the parent. The adult children’s grief did not subside at the time of facility placement. The grief intensified as feelings of helplessness and hopelessness were experienced as the adult children continue to watch the physical and mental deterioration of the parent. Society neither recognizes nor supports anticipatory grief associated with the dementing illnesses. The study calls for more research of family caregivers and anticipatory grief in response to the irreversible dementias. Loss of quality of life and human dignity was expressed by the adult children as violation of the parent. Quality of life for aged people with Alzheimer’s and related dementing disorders is becoming an ethical issue of our time.
A Lithium Depletion Boundary age of 40-50 Myr in NGC2232: Implications for tests of pre-main sequence stellar evolution
Creators: name: Binks, Alex
name: Jeffries, Rob
name: Jackson, Richard
Publisher: name: Zenodo
Year: 2021
Subjects: open clusters
stars: pre-main sequence
lithium depletion boundary

description: We identify a lithium depletion boundary (LDB) in the open cluster NGC2232, using spectroscopy obtained for high-probability
 cluster members observed in the Gaia ESO Surveya. Using 2 “flavours” of evolutionary models: ones that adopt standard stellar physics (SMs) and models that incorporate some form of radius inflation either using starspots or large surface magnetic fields (MMs), we find that:
 (1) LDB ages from SMs strongly agree (38±2 Myr), and those from MMs are 10–20% older, where spot-covering fraction (fsp) scales with age.
 (2) The isochronal ages are 2-3 times younger using the SMs, and get closer to a 1:1 agreement for heavily-spotted models. These results show that ages determined from CMD fits are highly sensitive to the choice of model inputs, radius inflation plays a key role for young low-mass stars, and that additional “ingredients” for models are vital to provide a full, quantitative predictive theory of pre-MS evolution.
description: To be presented at the Cool Stars 20.5 virtual conference.
Η δημιουργική γραφή στην προσχολική εκπαίδευση Σχεδιασμός και υλοποίηση εκπαιδευτικού προγράμματος
Creators: name: Παπαβασιλείου, Χαρίκλεια Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Δημιουργική γραφή
Προσχολική εκπαίδευση
Εκπαιδευτικό πρόγραμμα
Creative writing Childhood education
Educational program

description: Η δημιουργικότητα είναι μία πολυδιάστατη έννοια για την οποία πραγματοποιήθηκαν πολλές μελέτες ώστε να οριστούν τα χαρακτηριστικά της. Μερικοί παράγοντες που επηρεάζουν τη δημιουργικότητα είναι η ευφυΐα, τα χαρακτηριστικά της προσωπικότητας, τα κίνητρα και το κοινωνικό περιβάλλον. Όσον αφορά τη δημιουργικότητα στην προσχολική ηλικία, έχουν πραγματοποιηθεί πολλές έρευνες οι οποίες υποστηρίζουν ότι το κοινωνικό περιβάλλον είναι σημαντικός παράγοντας στην δημιουργικότητα των παιδιών. Πιο συγκεκριμένα, στην σχολική τάξη η Παιδική Λογοτεχνία και οι δημιουργικές δραστηριότητες της ευνοούν την ικανότητα των παιδιών να αναπτύξουν δημιουργικές ιδέες οι οποίες οδηγούν στην δημιουργική γραφή. Μέσα από τις δραστηριότητες δημιουργικής γραφής στην προσχολική ηλικία τα παιδιά καταφέρνουν να αναπτύξουν τις γλωσσικές ικανότητές τους. Στην έρευνα που πραγματοποιήθηκε σε δύο τάξεις προσχολικής εκπαίδευσης επιβεβαιώνεται ότι οι δραστηριότητες μέσα από τα λογοτεχνικά κείμενα οδήγησαν τα παιδιά στην ανάπτυξη δημιουργικών και πρωτότυπων ιδεών
description: Creativity is a multidimensional sense, for which many surveys have been made in order for its characteristics to be defined. Some factors that affect creativity are someone's intelligence, personality, motivation and social environment. Many research studies have taken place concerning preschool creativity, that support social environment is a key factor in children's creativity. More specifically, children's literature and creativity activities during a class, benefit kids' ability to develop ideas that can lead to creative writing. Children can develop their linguistic skills via creative writing exercises. In a research conducted in two preschool classes it has been confirmed, that activities based on literature texts led to new imaginative and original ideas
Principal component analysis model for machine-part cell formation problem in group technology
Creators: name: Hachicha, Wafik
name: Masmoudi, Faouzi
name: Haddar, Mohamed
Publisher: name: arXiv
Year: 2008
Subjects: subject: Applications (stat.AP)
subject: Classical Physics (physics.class-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In this paper, we consider the problem of forming machine cell in cellular manufacturing (CM). The major problem in the design of a CM system is to identify the part families and machine groups and consequently to form manufacturing cells. The aim of this article is to formulate a multivariate approach based on a correlation analysis for solving cell formation problem. The proposed approach is carried out in two phases. In the first phase, the correlation matrix is used as an original similarity coefficient matrix. In the second phase, Principal Component Analysis (PCA) is applied to find the eigenvalues and eigenvectors on the correlation similarity matrix. A scatter plot analysis as a cluster analysis is applied to make machine groups while maximizing correlation between elements. A numerical example for the design of cell structures is provided in order to illustrate the proposed approach. The results of a comparative study based on multiple performance criteria show that the present approach is very effective, efficient and practical
Kapitza thermal resistance in linear and nonlinear chain models: isotopic defect
Creators: name: Gendelman, O. V.
name: Paul, Jithu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Kapitza resistance in the chain models with internal defects is considered. For the case of the linear chain, the exact analytic solution for the boundary resistance is derived for arbitrary linear time-independent conservative inclusion or defect. A simple case of isolated isotopic defects is explored in more detail. Contrary to the bulk conductivity in the linear chain, the Kapitza resistance is finite. However, the universal thermodynamic limit does not exist in this case. In other terms, the exact value of the resistance is not uniquely defined and depends on the way of approaching the infinite lengths of the chain fragments. For this reason, and also due to the explicit dependence on the parameters of the thermostats, the resistance cannot be considered as a local property of the defect. Asymptotic scaling behavior of the heat flux in the case of very heavy defect is explored and compared to the nonlinear counterparts; similarities in the scaling behavior are revealed. For the lightweight isotopic defect in the linear chain, one encounters a typical dip of the temperature profile, related to weak excitation of the localized mode in the attenuation zone. If the nonlinear interactions are included, this dip can still appear at a relatively short time scale, with subsequent elimination due to the nonlinear interactions. This observation implies that even in the nonlinear chains, the linear dynamics can predict the main features of the short-time evolution of the thermal profile if the temperature is low enough.
Nuclear reactions in hot stellar matter and nuclear surface deformation
Creators: name: Denisov, V. Yu.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Cross-sections for capture reactions of charged particles in hot stellar matter turn out be increased by the quadrupole surface oscillations, if the corresponding phonon energies are of the order of the star temperature. The increase is studied in a model that combines barrier distribution induced by surface oscillations and tunneling. The capture of charged particles by nuclei with well-deformed ground-state is enhanced in stellar matter. It is found that the influence of quadrupole surface deformation on the nuclear reactions in stars grows, when mass and proton numbers in colliding nuclei increase.
description: 12 pages, 10 figures
Inbreeding and outbreeding depressions in the Penna model as a result of crossover frequency
Creators: name: Bonkowska, K.
name: Kula, M.
name: Cebrat, S.
name: Stauffer, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: The population in the sexual Penna ageing model is first separated into several reproductively isolated groups. Then, after equilibration, sexual mixing between the groups is allowed. We study the changes in the population size due to this mixing and interpret them through a counterplay of purifying selection and of haplotype complementarity.
description: 11 pages including 9 figures
D2.1: Definition of Use Cases, Service Requirements and KPIs/KVIs
Creators: name: Lopez Da Silva, Rafael
name: Groshev, Milan
name: Ertas, Sultan
name: Papagianni, Chrysa
Publisher: name: Zenodo
Year: 2023

description: This deliverable documents the selection of use cases to be used for the definition of the DESIRE6G system architecture and also for showcasing and validating the project achievements. The use cases are defined by means of KPIs and functional requirements, that are used to derive the requirements of the DESIRE6G system. A set of KVIs are also identified for the use cases selected.
NISO Plus 2022 session 'Preprint review - Addressing cultural barriers on the path for a more positive and inclusive review ecosystem' slides
Creators: name: Puebla, Iratxe
name: Saderi, Daniela
name: Gautam, Dey
name: Owango, Joy
name: Goodman, Laurie
Publisher: name: Zenodo
Year: 2022
Subjects: Preprints, preprint review, ASAPbio, PREreview, journals, open peer review, diversity & inclusion

description: Slides from the panel discussion around ‘Preprint review - Addressing cultural barriers on the path for a more positive and inclusive review ecosystem’, as part of the NISO Plus 2022 conference.
Towards absolute scales of radii and masses of open clusters
Creators: name: Piskunov, A. E.
name: Schilbach, E.
name: Kharchenko, N. V.
name: Röser, S.
name: Scholz, R. -D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: In this paper we derive tidal radii and masses of open clusters in the nearest kiloparsecs around the Sun. Methods: For each cluster, the mass is estimated from tidal radii determined from a fitting of three-parametric King's profiles to the observed integrated density distribution. Different samples of members are investigated. Results: For 236 open clusters, all contained in the catalogue ASCC-2.5, we obtain core and tidal radii, as well as tidal masses. The distributions of the core and tidal radii peak at about 1.5 pc and 7 - 10 pc, respectively. A typical relative error of the core radius lies between 15% and 50%, whereas, for the majority of clusters, the tidal radius was determined with a relative accuracy better than 20%. Most of the clusters have tidal masses between 50 and 1000 $m_\odot$, and for about half of the clusters, the masses were obtained with a relative error better than 50%.
description: 11 pages, 7 figures, accepted for publication in Astronomy & Astrophysics
Constraining stellar CME occurrence with optical spectroscopy
Creators: name: Odert, Petra
name: Leitzinger, Martin
name: Guenther, Eike W.
name: Heinzel, Petr
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence

description: Our knowledge on coronal mass ejections (CMEs) on stars other than the Sun is still sparse. Spectroscopic observations in the optical sometimes show asymmetrically broadened wings and/or transient extra-emissions in chromospheric lines during or shortly after flare events. These may be interpreted as signatures of prominence eruptions, which are closely related to CMEs on the Sun. Dedicated searches for these signatures have, however, mostly yielded non-detections. Here we present a semi-empirical model which combines predictions of intrinsic stellar CME rates with simple radiative transfer calculations in the Balmer lines. We find that typical observations have most likely been too short and/or they had a too low signal-to-noise ratio to detect CMEs. We predict the minimum observing time needed to detect CMEs in the Balmer lines for stars with different spectral types and activity levels.
description: {"references": ["Heinzel, P. (2015) in: Astrophysics and Space Science Library, Vol. 415, Solar Prominences, ed. J.-C. Vial & O. Engvold, 103-130", "Labrosse, N., Heinzel, P., Vial, J.-C., et al. (2010) SSR, 151, 243", "Odert, P., Leitzinger, M., Guenther, E. W., Heinzel, P. (2020) MNRAS, 494, 3766", "Odert, P., Leitzinger, M., Hanslmeier, A., Lammer, H. (2017) MNRAS, 472, 876"]}
Additional file 1: of Associations of the PON1 rs662 polymorphism with circulating oxidized low-density lipoprotein and lipid levels: a systematic review and meta-analysis
Creators: name: Luo, Zhi
name: Pu, Lijun
name: Muhammad, Irfan
name: Chen, Yun
name: Sun, Xiaoqian
Publisher: name: figshare
Year: 2018
Subjects: Environmental Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Science Policy
Computational Biology

description: The reference list for the studies included in the present meta-analysis. (DOCX 26 kb)
Challenges for a QCD Axion at the 10 MeV Scale
Creators: name: Liu, Jia
name: McGinnis, Navin
name: Wagner, Carlos E. M.
name: Wang, Xiao-Ping
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report on an interesting realization of the QCD axion, with mass in the range $\mathcal{O}(10)$ MeV. It has previously been shown that although this scenario is stringently constrained from multiple sources, the model remains viable for a range of parameters that leads to an explanation of the Atomki experiment anomaly. In this article we study in more detail the additional constraints proceeding from recent low energy experiments and study the compatibility of the allowed parameter space with the one leading to consistency of the most recent measurements of the electron anomalous magnetic moment and the fine structure constant. We further provide an ultraviolet completion of this axion variant and show the conditions under which it may lead to the observed quark masses and CKM mixing angles, and remain consistent with experimental constraints on the extended scalar sector appearing in this Standard Model extension. In particular, the decay of the Standard Model-like Higgs boson into two light axions may be relevant and leads to a novel Higgs boson signature that may be searched for at the LHC in the near future.
description: 30 pages, 4 figures, 1 table
The Light Curve Fitter: A novel application for deconvolving two superimposed sinusoidal waves developed using the Agile Software Development Lifecycle
Creators: name: Dulaimi, Salam
name: Fitzgerald, Karol
name: Boyle, Richard P.
name: Golden, Aaron
name: Butler, Ray F.
Publisher: name: Zenodo
Year: 2021
Subjects: binary systems
superimposed sinusoidal waves

description: The Galway Ultra-Fast Imager (GUFI) located on the 1.8m Vatican Advanced Technology Telescope (VATT) was tasked to monitor tight brown dwarf binaries. However, due to the close separation between the components in these binaries, the GUFI photometer could not image each component of binary systems as a point source in our campaign. Therefore, we developed and employed our novel application, the ‘Light Curve Fitter’, which is capable of distinguishing two superimposed sinusoidal waves. This application allows users to untangle the secondary component's variability signature from that of the dominant primary variability.
Ottava giornata di studio Ettore Funaioli - 18 luglio 2014
Creators: name: Meneghetti, Umberto
name: Maggiore, Alberto
name: Parenti Castelli, Vincenzo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: ING-IND/13 Meccanica applicata alle macchine

description: In questo volume sono raccolte le memorie presentate in occasione della “Ottava Giornata di Studio Ettore Funaioli”, che si è svolta il 18 luglio 2014 presso la Scuola di Ingegneria e Architettura dell’Alma Mater Studiorum – Università di Bologna.
La Giornata è stata organizzata dagli ex allievi del Prof. Ettore Funaioli con la collaborazione del DIN – Dipartimento di Ingegneria Industriale e della Scuola di Ingegneria e Architettura dell’Alma Mater Studiorum – Università di Bologna, e con il patrocinio dell’Accademia delle Scienze dell’Istituto di Bologna e del GMA – Gruppo di Meccanica Applicata.
The bridges to consensus: Network effects in a bounded confidence opinion dynamics model
Creators: name: Schawe, Hendrik
name: Fontaine, Sylvain
name: Hernández, Laura
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: In this work we present novel results to the problem of the Hegselmann-Krause dynamics in networks obtained by an extensive study of the behavior of the standard order parameter sensitive to the onset of consensus: the normalized size of the giant cluster. This order parameter reveals the non trivial effect of the network topology on the steady states of the dynamics, overlooked by previous works, which concentrated on the onset of unanimity, and allows to detect regions of polarization between the fragmented and the consensus phases. While the previous results on unanimity are confirmed, the consensus threshold shifts in the opposite direction compared to the threshold for unanimity. A detailed finite size scaling analysis shows that, in general, consensus is easier to obtain in networks than in mixed populations. At a difference with previous studies, we show that the network topology is relevant beyond the finitness of the average degree with increasing system size. In particular, in pure random networks (either uniform random graphs or scale free networks), the consensus threshold seems to vanish in the thermodynamic limit. A detailed analysis of the time evolution of the dynamics reveals the role of bridges in the network, which allow for the interaction between agents belonging to clusters of very different opinions, after several repeated interaction steps. These bridges are at the origin of the shift of the confidence threshold to lower values in networks as compared to lattices or the mixed population.
description: 15 pages, 13 figures, 1 table, 6 pages supplemental material with 8 figures
How `hot' are mixed quantum states?
Creators: name: Parfionov, George
name: Zapatrin, Roman R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Given a mixed quantum state $ρ$ of a qudit, we consider any observable $M$ as a kind of `thermometer' in the following sense. Given a source which emits pure states with these or those distributions, we select such distributions that the appropriate average value of the observable $M$ is equal to the average Tr$Mρ$ of $M$ in the stare $ρ$. Among those distributions we find the most typical one, namely, having the highest differential entropy. We call this distribution conditional Gibbs ensemble as it turns out to be a Gibbs distribution characterized by a temperature-like parameter $β$. The expressions establishing the liaisons between the density operator $ρ$ and its temperature parameter $β$ are provided. Within this approach, the uniform mixed state has the highest `temperature', which tends to zero as the state in question approaches to a pure state.
description: Contribution to Quantum 2006: III workshop ad memoriam of Carlo Novero: Advances in Foundations of Quantum Mechanics and Quantum Information with atoms and photons. 2-5 May 2006 - Turin, Italy
Production of heavy charged particles in proton-proton ultraperipheral collisions at the Large Hadron Collider: survival factor
Creators: name: Godunov, S. I.
name: Novikov, V. A.
name: Rozanov, A. N.
name: Vysotsky, M. I.
name: Zhemchugov, E. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Ultraperipheral collisions of high energy protons are a source of approximately real photons colliding with each other. Photon fusion can result in production of yet unknown charged particles in very clean events. The cleanliness of such an event is due to the requirement that the protons survive during the collision. Finite sizes of the protons reduce the probability of such outcome compared to point-like particles. We calculate the survival factors and cross sections for the production of heavy charged particles at the Large Hadron Collider.
description: 15 pages, 7 figures; version accepted by JHEP
Berkeley Undergraduate Field Methods: K'iche'
Creators: name: Pérez, Martín
name: Bell, John
name: Chow, Serena
name: Han, My-Hanh
name: Hinton, Leanne
name: Huie, Pamela
name: Pettit, Richard
name: Schucker, Jane
name: Shawver, Marina
name: Sotomayor, Sylvia
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024

description: Field notes, assignment prompts, administrative documents, cardfile printouts, term papers, lexical file slips.
The Age of the Carina Young Association and Potential Membership of HD 95086
Creators: name: Booth, Mark
name: del Burgo, Carlos
name: Hambaryan, Valeri
Publisher: name: Zenodo
Year: 2021
Subjects: Stellar systems, clusters, and associations
Circumstellar discs

description: Carina is a nearby young stellar association. So far, only a small number of stars have been clearly identified as members of this association. In this paper, we reanalyse the membership of the association in light of Gaia DR2 data, in particular finding that HD 95086 is a potential member (probability of 71 per cent). This star is noteworthy as one of the few stars that hosts both a detected debris disc and a directly imaged planet. It has previously only been considered as a potential member of the Lower Centaurus Crux (LCC) – part of the Scorpius–Centaurus association. We also reanalyse the age of the Carina association. Using a Bayesian inference code applied to infer a solution from stellar evolution models for the most probable (>99 per cent) members of Carina, we infer an age for the association of 13±1 Myr, much younger than previous studies. Whilst we have revised HD 95086’s association membership from LCC to Carina, the fact that we also find Carina to have a younger age, similar to that of LCC, means that the estimates of HD 95086b’s mass remain unchanged.
description: MB and VVH acknowledge support from the Deutsche Forschungsgemeinschaft (DFG) through grants Kr 2164/13-2 and Ne 515/61-1 respectively. CdB acknowledges the funding of his sabbatical position through the Mexican national council for science and technology (CONACYT grant CVU No. 448248). CdB is also thankful for the support from the Jesús Serra Foundation Guest Program.
description: {"references": ["Bell C. P. M., Mamajek E. E., Naylor T., 2015, MNRAS, 454, 593", "Booth M., et al., 2019, MNRAS, 482, 3443", "del Burgo C., Allende Prieto C., 2018, MNRAS, 479, 1953", "Gagn\u00e9 J., et al., 2018, ApJ, 856, 23", "Gaia Collaboration et al., 2018, A&A, 616, A1", "Madsen S., Dravins D., Lindegren L., 2002, A&A, 381, 446", "Mo\u00f3r A., et al., 2013, ApJ, 775, L51", "Schneider A. C., Shkolnik E. L., Allers K. N., Kraus A. L., Liu M. C., Weinberger A. J., Flagg L., 2019, AJ, 157, 234", "Torres C. A. O., Quast G. R., de La Reza R., da Silva L., Melo C. H. F., 2001, in Jayawardhana R., Greene T., eds, Astronomical Society of the Pacific Conference Series Vol. 9 244, Young Stars Near Earth: Progress and Prospects. p. 43 (arXiv:astro-ph/0105291)", "Torres C. A. O., Quast G. R., Melo C. H. F., Sterzik M. F., 2008, Handbook of Star Forming Regions: Volume II, The Southern Sky. Astronomical Society of the Pacific, p. 757"]}
Near-BPS baby Skyrmions with Gaussian tails
Creators: name: Gudnason, Sven Bjarke
name: Barsanti, Marco
name: Bolognesi, Stefano
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the baby Skyrme model in a physically motivated limit of reaching the restricted or BPS baby Skyrme model, which is a model that enjoys area-preserving diffeomorphism invariance. The perturbation consists of the kinetic Dirichlet term with a small coefficient $ε$ as well as the standard pion mass term, with coefficient $εm_1^2$. The pions remain lighter than the soliton for any $ε$ and therefore the model is physically acceptable, even in the $ε\to 0$ limit. The version of the BPS baby Skyrme model we use has BPS solutions with Gaussian tails. We perform full numerical computations in the $ε\to 0$ limit and even reach the strict $ε=0$ case, finding new nontrivial BPS solutions, for which we do not yet know the analytic form.
description: LaTeX: 47 pages, 16 figures; V2: published version
Radio Polarization of BL Lacertae objects
Creators: name: Fan, Jun-Hui
name: Hua, Tong-Xu
name: Yuan, Yu-Hai
name: Wang, Yong-Xiang
name: Liu, Yi
name: Su, Jiang-Bo
name: Zhang, Yong-Wei
name: Yang, Jiang-He
name: Huang, Yong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper, using the database of the university of Michigan Radio Astronomy Observatory (UMRAO) at three (4.8 GHz, 8 GHZ, and 14.5 GHz) radio frequencies, we studied the polarization properties for 47 BL Lacertae objects(38 radio selected BL Lacertae objects, 7 X-ray selected BL Lacertae, and two inter-middle objects (Mkn 421 and Mkn 501), and found that (1) The polarizations at higher radio frequency is higher than those at lower frequency, (2) The variability of polarization at higher radio frequency is higher than those at lower frequency, (3) The polarization is correlated with the radio spectral index, and (4) The polarization is correlated with core-dominance parameter for those objects with known core-dominance parameters suggesting that the relativistic beaming could explain the polarization characteristic of BL Lacs.
description: 5 pages, 3 figures, 1 table. PASJ, in press
Bayesian Spectroscopic Characterization of Brown Dwarfs and Implications for Model Atmospheres
Creators: name: Zhang, Zhoujian
name: Liu, Michael C.
name: Marley, Mark S.
name: Line, Michael R.
name: Best, William M. J.
name: Magnier, Eugene A.
Publisher: name: Zenodo
Year: 2021
Subjects: Very low mass stars
Brown dwarfs and exoplanets

description: Spectroscopic characterization of brown dwarfs is essential for understanding their atmospheres, formation, and evolution, but such work is challenged by the unavoidably simplified model atmospheres needed to interpret spectra. While most previous work has focused on single or at most a few objects, comparing a large collection of spectra to models can uncover trends in data-model inconsistencies needed to improve models of ultracool atmospheres, thereby leading to robust properties from cool star spectra. Therefore, we are conducting a systematic analysis of a valuable but underutilized resource: the numerous high-quality spectra of (free-floating or companion) brown dwarfs already accumulated by the community. Focusing on the cool-temperature end, we have constructed a Bayesian modeling framework using the new Sonora-Bobcat model atmospheres and have applied it to study near-infrared low-resolution spectra of >50 late-T brown dwarfs (≈600-1200 K, ≈10-70 MJup) and to infer their physical properties (temperature, surface gravity, metallicity, radii, mass). By virtue of having such a large sample of high-quality spectra, our analysis identifies the systematic offsets between observed and model spectra as a function of wavelength and physical properties to pinpoint specific shortcomings in model predictions. We have also found that the spectroscopically inferred metallicities, ages, and masses of our sample all considerably deviate from expectations, suggesting the physical and chemical assumptions made within these models need to be improved to fully interpret data. Our work has established the most systematic validation of cloudless model atmospheres to date and we discuss extending such analysis to wider temperature and wavelength (e.g., JWST) ranges, as well as finding new brown dwarf benchmarks, in order to validate models of cool stars over larger parameter space.