cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
King Ghidorah Supercluster: Mapping the light and dark matter in a new supercluster at z=0.55 using the Subaru Hyper Suprime-Cam
Creators: name: Shimakawa, Rhythm
name: Okabe, Nobuhiro
name: Shirasaki, Masato
name: Tanaka, Masayuki
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: This paper reports our discovery of the most massive supercluster, termed the King Ghidorah Supercluster (KGSc), at $z=0.50-0.64$ in the Third Public Data Release of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP PDR3) over 690 deg$^2$, as well as an initial result for a galaxy and dark matter mapping. The primary structure of the KGSc comprises triple broad weak-lensing (WL) peaks over 70 comoving Mpc. Such extensive WL detection at $z>0.5$ can only currently be achieved using the wide-field high-quality images produced by the HSC-SSP. The structure is also contiguous with multiple large-scale structures across a $\sim400$ comoving Mpc scale. The entire field has a notable overdensity ($δ=14.7\pm4.5$) of red-sequence clusters. Additionally, large-scale underdensities can be found in the foreground along the line of sight. We confirmed the overdensities in stellar mass and dark matter distributions to be tightly coupled and estimated the total mass of the main structure to be $1\times10^{16}$ solar masses, according to the mock data analyses based on large-volume cosmological simulations. Further, upcoming wide-field multi-object spectrographs such as the Subaru Prime Focus Spectrograph may aid in providing additional insights into distant superclusters beyond the 100 Mpc scale.
description: 5 pages, 5 figures, accepted for publication in MNRAS Letter
On unbounded invariant measures of stochastic dynamical systems
Creators: name: Brofferio, Sara
name: Buraczewski, Dariusz
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We consider stochastic dynamical systems on ${\mathbb{R}}$, that is, random processes defined by $X_n^x=Ψ_n(X_{n-1}^x)$, $X_0^x=x$, where $Ψ_n$ are i.i.d. random continuous transformations of some unbounded closed subset of ${\mathbb{R}}$. We assume here that $Ψ_n$ behaves asymptotically like $A_nx$, for some random positive number $A_n$ [the main example is the affine stochastic recursion $Ψ_n(x)=A_nx+B_n$]. Our aim is to describe invariant Radon measures of the process $X_n^x$ in the critical case, when ${\mathbb{E}}\log A_1=0$. We prove that those measures behave at infinity like $\frac{dx}{x}$. We study also the problem of uniqueness of the invariant measure. We improve previous results known for the affine recursions and generalize them to a larger class of stochastic dynamical systems which include, for instance, reflected random walks, stochastic dynamical systems on the unit interval $[0,1]$, additive Markov processes and a variant of the Galton--Watson process.
description: Published at http://dx.doi.org/10.1214/13-AOP903 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Alternaria Rot Following Chilling Injury of Acorn Squashes
Creators: name: McColloch, Lacy P.
name: McColloch, Lacy P.
Publisher: name: Unknown
Year: 1962
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: This study was prompted by the suspicion of low-temperature injury in a commercial shipment of acorn squashes which developed a high percentage of alternaria rot. The numerous spots of alternaria rot on the squashes were so strikingly similar to those found on low-temperature-injured tomatoes that chilling injury was immediately suspected. The purposes of the present study were to determine the time-temperature relationship to chilling injury of acorn squashes; determine symptoms of chilling injury; relate the occurrence of Alternaria rot to chilling injury; identify the species of Alternaria responsible for the rot; and obtain information on the nature and pathogenicity of the Alternaria fungus.
Two-fluid numerical model of chromospheric heating and plasma outflows in a quiet-Sun
Creators: name: Murawski, K.
name: Musielak, Z. E.
name: Poedts, S.
name: Srivastava, A. K.
name: Kadowaki, L. H. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: \textbf{Purpose:} This paper addresses long-standing solar physics problems, namely, the heating of the solar chromosphere and the origin of the solar wind. Our aim is to reveal the related mechanisms behind chromospheric heating and plasma outflows in a quiet-Sun. \textbf{Methods:} The approach is based on a two-fluid numerical model that accounts for thermal non-equilibrium (ionization/recombination), non-adiabatic, and non-ideal dynamics of protons+electrons and hydrogen atoms. The model is applied to numerically simulate the propagation and dissipation of granulation-generated waves in the chromosphere and plasma flows inside a quiet region. \textbf{Results:} The obtained results demonstrate that collisions between protons+electrons and hydrogen atoms supplemented by plasma viscosity, magnetic resistivity, and recombination lead to thermal energy release, which compensates radiative and thermal losses in the chromosphere, and sustains the atmosphere with vertical profiles of averaged temperature and periods of generated waves that are consistent with recent observational data. \textbf{Conclusion:} Our model conjectures a most robust and global physical picture of granulation-generated wave motions, plasma flows, and subsequent heating, which form and dynamically couple the various layers of the solar atmosphere.
description: 21 pages, 5 figures. Accepted for publication in Astrophysics and Space Science
Modeling and controlling an active constrained layer (ACL) beam actuated by two voltage sources with/without magnetic effects
Creators: name: Ozer, Ahmet Ozkan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q93, 35Q70, 74F15, 70Q05, 93D15

description: A fully dynamic three-layer active constrained layer (ACL) beam is modeled for cantilevered boundary conditions by using a thorough variational approach. The Rao-Nakra thin compliant layer assumptions are adopted to model the sandwich structure, and all magnetic effects for the piezoelectric layers are retained. The piezoelectric layers are activated by two different voltage sources. When there are no "mechanical" boundary forces acting in the longitudinal direction, it is shown that the system with certain parameter combinations is not uniformly strongly stabilizable by the $B^*-$type feedback controller, which is the total current accumulated at the electrodes for the piezoelectric layers. However, as the magnetic effects are ignored (electrostatic assumption), the closed-loop system with all mechanical feedback controllers is shown to be uniformly exponentially stable.
„Auch wenn es stressig ist, man schafft es unglaublicher Weise trotzdem!“ Notizen vom 5. Sprachenturnier des Bundeswettbewerbs Fremdsprachen in Soest
Creators: name: Rabl, Josef
Publisher: name: Forum Classicum
Year: 2017

description: -
description: Forum Classicum, Nr. 1 (2004): Forum Classicum
A new technique to isolate kinematically anomalous gas in HI data cubes
Creators: name: Randriamiarinarivo, Nandrianina
name: Elson, Ed
name: Baker, Andrew
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: HI line observations of nearby galaxies often reveal the presence of extraplanar and/or kinematically anomalous gas that deviates from the general circular flow. In this work, we study the dependence of kinematically anomalous HI gas in galaxies taken from the Simba cosmological simulation on galaxy properties such as HI mass fraction, specific star formation rate, and local environmental density. To identify kinematically anomalous gas, we use a simple yet effective decomposition method to separate it from regularly-rotating gas in the galactic disk; this method is well-suited for application to observational datasets but has been validated here using the simulation. We find that at fixed atomic gas mass fraction, the anomalous gas fraction increases with the specific star formation rate. We also find that the anomalous gas fraction does not have a significant dependence on a galaxy's environment. Our decomposition method has the potential to yield useful insights from future HI surveys.
description: 11 pages, 12 figures, accepted for publication in MNRAS
Exploring the relationship between urbanization and Ikization
Creators: name: Ye, Lv
name: Chen, Yanguang
Publisher: name: arXiv
Year: 2015
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The phenomenon of Iks was first found by anthropologists and biologists, but it is actually a problem of human geography. However, it has not yet drawn extensive attention of geographers. In this paper, a hypothesis of ikization is presented that sudden and violent change of geographical environments results in dismantling of traditional culture, which then result in collective depravity of a nationality. By quantitative analysis and mathematical modeling, the causality between urbanization and ikization is discussed, and the theory of replacement dynamics is employed to interpret the process of ikization. Urbanization is in essence a nonlinear process of population replacement. Urbanization may result in ikization because that the migration of population from rural regions to urban regions always give rise to abrupt changes of geographical environments and traditional culture. It is necessary to protect the geographical environment against disruption, and to inherit and develop traditional culture in order to avoid ikization of a nation. The approach to solving the problems caused by fast urbanization is to reconstruct geographical environment so that rural culture will be naturally replaced by urban culture.
description: 21 pages, 6 figures, 4 tables
Holographic charge density waves
Creators: name: Donos, Aristomenis
name: Gauntlett, Jerome P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that strongly coupled holographic matter at finite charge density can exhibit charge density wave phases which spontaneously break translation invariance while preserving time-reversal and parity invariance. We show that such phases are possible within Einstein-Maxwell-dilaton theory in general spacetime dimensions. We also discuss related spatially modulated phases when there is an additional coupling to a second vector field, possibly with non-zero mass. We discuss how these constructions, and others, should be associated with novel spatially modulated ground states.
description: 18 pages, 1 figure. A typo corrected
title: Παραθεριστικές κατοικίες στο Σταυρό Ακρωτηρίου
Creators: name: Λαζαριδου Κωνσταντινα
Publisher: name: Technical University of Crete
Year: 2015

description: Ο Σταυρός βρίσκεται στη βόρεια ακτή της χερσονήσου του Ακρωτηρίου, 15 χλμ από τα Χανιά. Πρόκειται για μια αραιοκατοικημένη περιοχή με ελάχιστους μόνιμους κατοίκους και ζωή αποκλειστικά τους καλοκαιρινούς μήνες. Έχει μοναδικά φυσικά χαρακτηριστικά, όπως το βουνό (δεσπόζει και φαίνεται από οποιοδήποτε σημείο), τα βράχια (παλιά νταμάρια ψαμμόλιθου δίπλα στη θάλασσα) και τη θάλασσα η οποία εισέρχεται στον οικισμό με μορφή ποταμού. Αποτελείται σχεδόν αποκλειστικά από κατοικίες, ξενοδοχεία και ενοικιαζόμενα δωμάτια και υπάρχει έλλειψη των βασικών υποδομών καθώς έχει μόνο τρία εμπορικά καταστήματα. Δεν υπάρχει μια ενιαία δημόσια εικόνα του Σταυρού καθώς ένα συνονθύλευμα από αρχιτεκτονικά στυλ συνθέτουν το τοπίο. Κάθε ένα από αυτά τα στυλ αντικατοπτρίζουν το ύφος και την ταυτότητα του εκάστοτε ιδιοκτήτη. Ο βασικός στόχος που τίθεται είναι η προσέλκυση διαφορετικών ειδών τουρισμού (οικοτουρισμός) και η δημιουργία ταυτότητας. Απαραίτητη προϋπόθεση κρίνεται η δημιουργία βιώσιμου χώρου, η συγκέντρωση του πληθυσμού και η αύξηση των μόνιμων κάτοικων. Έτσι προτείνεται η δημιουργία ενός χώρου αναφοράς, ενός πυρήνα, που μεταφράζεται ως μια παραθαλάσσια γειτονιά. Ταυτόχρονα, προτείνεται η δημιουργία μικρών καταστημάτων λιανικής πώλησης για την εξυπηρέτηση του πληθυσμού και την απασχόληση των μόνιμων κατοίκων, και στην δημιουργία δικτύου για την ευκολότερη πρόσβαση στο φυσικό τοπίο.
Spectral analysis of basaltic asteroids observed by the Gaia space mission
Creators: name: Oszkiewicz, Dagmara
name: Klimczak, Hanna
name: Carry, Benoit
name: Penttila, Antti
name: Popescu, Marcel
name: Kruger, Joahim
name: Keniger, Marcelo Aron
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: There is a great deal of scientific interest in characterizing the basaltic asteroids (spectrally classified as V-types), as they are the key to understanding planetesimal formation and evolution in the early Solar System. These have long been recognized as parts of the crusts of fully differentiated planetesimals. Thus, their multiplicity, distribution, and physical characteristics are crucial for providing context for and constraining the theoretical evolution models of the Solar System. In this work, we perform spectral analysis with an extended data set of spectral measurements from the ESA Gaia mission Data Release 3, thus increasing the sample size of the analyzed V-types by more than three times as compared to the literature. Using the data provided by Gaia we identified ~2000 possible V-type asteroids. About 350 of them successfully pass our data validation criteria. This sample includes 31 new V-type asteroids beyond 2.5 au and 6 in the Phocaea region. We confirm that the V-type asteroids in the middle and outer part of the main belt show distinct spectral properties compared to typical vestoids. In the inner main belt, we found a great diversity of spectral parameters among the V-types in all populations. Number of asteroids show band depths even greater than that of (1459) Magnya. Furthermore, some objects present 0.9~\textmu{}m band-centers more than one standard deviation away from the typical value for vestoids. However since the DR3 band centers are often overestimated, those findings are to be confirmed. Overall our results indicate that the inner main belt may contain remnants of multiple differentiated planetesimals, not just (4) Vesta.
description: Accepted to MNRAS
title: Μεταξύ πόλης και τρένου: Κέντρο καλλιτεχνικής παιδείας και δημιουργικής απασχόλησης στους Αγίους Αναργύρους Αττικής
Creators: name: Γερομητσου Ερατω-Αννα
Publisher: name: Technical University of Crete
Year: 2015

description: Η παρούσα διπλωματική εργασία θέτει ως στόχο την αναζωογόνηση του κέντρου των Αγίων Αναργύρων Αττικής, μια γειτονιά άμεσα συνυφασμένη με την κίνηση των τρένων, μέσα από τη δημιουργία ενός πολυ-λειτουργικού συμπλέγματος ανοιχτών και κλειστών χώρων. Μέσα από μουσικές θεωρίες, εξετάζει τον τρόπο με τον οποίο το προτεινόμενο συνδιαλέγεται με το υπάρχον, είτε πρόκειται για το χτισμένο είτε για την παρουσία πρασίνου, πάνω σε ελεύθερες ροές ή άξονες
Walter Burkert: Die Griechen und der Orient
Creators: name: Lobe, Michael
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Walter Burkert: Die Griechen und der Orient. München (C.H. Beck) 2003. 176 S., (ISBN 3-406-50247-4).
description: Forum Classicum, Nr. 1 (2004): Forum Classicum
Exploring Factors that Limit Contraception Use Among Adolescent Girls Aged 15-19 in Puerto Princesa, Palawan, Philippines
Creators: name: Wood, Olivia Rose
Publisher: name: Columbia University
Year: 2020
Subjects: Reproductive health
Contraception
Contraceptives
Teenage girls

description: While effective and affordable contraceptive methods have been developed over past decades, the unmet need for contraception among girls and women remains high across the globe. Many factors contribute to this unmet need globally, including lack of access to contraception, gender norms, religious or cultural restrictions, fear of side-effects, and provider bias. Rates of unmet need for contraception are higher in the Philippines than the global average among all demographic groups, but they are the highest among unmarried adolescents aged 15- 19. This age group represents the population most in need of contraception and, as such, they are left overwhelmingly unprotected from unwanted pregnancy. Despite this knowledge, there is a gap in the current literature specific to the unique political and religious context of the Philippines about factors responsible for limiting contraception use among the key population of adolescent girls. Thus, this research proposal offers a qualitative approach to exploring the barriers that girls themselves report to face when accessing contraception, as well as the barriers that healthcare providers and educators observe. Additionally, the proposed research aims to better understand the role of sexual education in increasing contraception use among the population. Ultimately, the proposed study seeks to give a voice to an often marginalized and underrepresented group and advance the current knowledge of factors that influence a girl’s ability to access contraception.
Multi-variable Integration with a Neural Network
Creators: name: Maître, Daniel
name: Santos-Mateos, Roi
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article we present a method for automatic integration of parametric integrals over the unit hypercube using a neural network. The method fits a neural network to the primitive of the integrand using a loss function designed to minimize the difference between multiple derivatives of the network and the function to be integrated. We apply this method to two example integrals resulting from the sector decomposition of a one-loop and two-loop scalar integrals. Our method can achieve per-mil and percent accuracy for these integrals over a range of invariant values. Once the neural network is fitted, the evaluation of the integral is between 40 and 125 times faster than the usual numerical integration method for our examples, and we expect the speed gain to increase with the complexity of the integrand.
description: 15 pages, 4 figures, typo corrected, version accepted by JHEP
A Systematic Review of Coastal Vulnerability Mapping
Creators: name: Bukvic, Anamaria
name: Rohat, Guillaume
name: Apotsos, Alex
name: De Sherbinin, Alexander M.
Publisher: name: Columbia University
Year: 2020
Subjects: Coastal zone management
Maps
Sea level
Floods
Climatic changes
Climate change mitigation

description: Coastal areas worldwide represent an aggregation of population and assets of growing economic, geopolitical, and sociocultural significance, yet their functions are increasingly challenged by worsening coastal hazards. Vulnerability assessments have been recognized as one way we can better understand which geographic areas and segments of society are more susceptible to adverse impacts from different stressors or hazards. The aims of this paper are to evaluate the state of coastal vulnerability assessment mapping efforts and to identify opportunities for advancement and refinement that will lead to more cohesive, impactful, and policy-relevant coastal vulnerability studies. We conducted a systematic review of the literature that addresses physical and social vulnerability to coastal hazards and contains corresponding mapping products. The content was analyzed for the scale of analysis, location, disciplinary focus, conceptual framework, metrics used, methodological approach, data sources, mapping output, and policy relevance. Results showed that most Coastal Vulnerability Mapping Assessments (CVMAs) are conducted at the local level using a range of methodologies, often with limited inclusion of social considerations and limited discussion of policy relevance. Based on our analysis, we provide seven recommendations for the advancement of this field that would improve CVMAs’ methodological rigor, policy relevance, and alignment with other vulnerability assessment paradigms.
Near-Horizon Geometry and the Entropy of a Minimally Coupled Scalar Field in the Kerr Black Hole
Creators: name: Ghosh, Kaushik
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 81Q20, 81T20, 58J35, 11M36

description: In this article we will discuss a Lorentzian sector calculation of the entropy of a minimally coupled scalar field in the Kerr black hole background. We will use the brick wall model of G.'t Hooft. In the Kerr black hole, complications arise due to the absence of a global timelike Killing field and the presence of the ergosphere. Nevertheless, it is possible to calculate the entropy of a thin shell of matter field in the near-horizon region using the brick wall model. The corresponding leading order entropy of the nonsuperradiant modes is found to be proportional to the area of the horizon and is logarithmically divergent. Thus, to the leading order, the entropy of a three-dimensional system in the near-horizon region is proportional to the boundary surface. This aspect is also valid in the Schwarzschild black hole. The corresponding internal energy remains finite if the entropy is chosen to be of the order of the black hole entropy itself. For a fixed value of the brick wall cut-off, the leading order entropy in the Kerr black hole is found to be half of the corresponding term in the Schwarzschild black hole. This is due to rotation and is consistent with the preferential emission of particles in the Kerr black hole with azimuthal angular momentum in the same direction as that of the black hole itself. However, we can obtain the Schwarzschild case expression by including a subleading term and taking the appropriate slow rotation limit. In this version, we will discuss a sub-leading term for the scalar field entropy in Schwarzschild black hole. This term reduces to an expression similar to the corresponding flat spacetime entropy in the limit when radius of event horizon is vanishing.
description: 13 pages, a few discussions on flat spacetime limit are added, published in Prog. Theo. Exp. Phys
title: Ανάκτηση σφαλερίτη από μετάλλευμα μικτών θειούχων με μαγνητικό διαχωρισμό προς αποφυγή χρήσης κυανιούχου νάτριου
Creators: name: Δερμιτζακη Ρωξανη
Publisher: name: Technical University of Crete
Year: 2016

description:  Στα πλαίσια της διπλωματικής εργασίας με τίτλο,
ΑΝΑΚΤΗΣΗ  ΣΦΑΛΕΡΙΤΗ  ΑΠΟ ΜΕΤΑΛΛΕΥΜΑ  ΜΙΚΤΩΝ  ΘΕΙΟΥΧΩΝ  ΜΕ  ΜΑΓΝΗΤΙΚΟ  ΔΙΑΧΩΡΙΣΜΟ  ΠΡΟΣ ΑΠΟΦΥΓΗ  ΧΡΗΣΗΣ  ΚΥΑΝΙΟΥΧΟΥ  ΝΑΤΡΙΟΥ
προκειμένου να ξεχωρίσουμε τον σφαλερίτη από πυρίτες  (σιδηροπυρίτη, αρσενοπυρίτη)  και γαληνίτη, κατά την διαδικασία εμπλουτισμου μικτών θειούχων, χρησιμοποιήθηκε μαγνητικός διαχωρισμός αντί της επίπλευσης με σκοπό την αποφυγή χρήσης κυανιούχου νατρίου.
   Το δείγμα που χρησιμοποίησαμε προερχόταν απο την εταιρεία Ελληνικός Χρυσός και συγκεκριμένα απο το μεταλλείο  Μαύρων Πετρών  στο Στρατώνι Χαλκιδικής. Σήμερα για να επιτευχθεί η ανάκτηση του σφαλερίτη,  χρησιμοποιείται  η διαδικασία της επίπλευσης και γίνεται χρήση κυανιούχου νάτριου. Το κυανιούχο νάτριο μπορεί να έχει πολύ σοβαρές περιβαλλοντικές επιπτώσεις . Παρόλο που υπάρχουν μέθοδοι εξουδετέρωσης του και δεν υπάρχει κίνδυνος για το περιβάλλον εξακολουθούν να υπάρχουν κοινωνικές αντιδράσεις απο τη χρήση του .
   Για να πετύχουμε το σκοπό μας, χρησιμοποιήσαμε μαγνητικό διαχωρισμό  αντί της επίπλευσης. Εκμεταλλευτήκαμε το γεγονός ότι ο  αρσενοπυρίτης ( FeAsS ), ο σιδηροπυρίτης( FeS ) και ο γαληνίτης ( PbS) δεν έλκονται σχεδόν καθόλου  από τον μαγνήτη ενώ ο σφαλερίτης (ΖnFeS )  έλκετε από αυτόν. Η μαγνητική επιδεκτικότητα του σφαλερίτη στο συγκεκριμένο μετάλλευμα οφείλεται στο ότι ένα μέρος του Zn στο κρυσταλλικό του πλέγμα έχει αντικατασταθεί με δισθενή Fe σε ποσοστά μέχρι 30%.
   Επιπλέον δύο πολύ σημαντικοί παράγοντες που δύνανται να επηρεάσουν το αποτέλεσμα, είναι η ένταση του μαγνητικού πεδίου και  η κοκκομετρία του υλικού  καθόσον αυτή επηρεάζει την αποδέσμευση των ορυκτών μεταξύ τους. Με τον τρόπο αυτό είναι δυνατόν να επιτευχθεί μαγνητικός διαχωρισμός του σφαλερίτη, για τον οποίο ενδιαφερόμαστε.
   Συγκεκριμένα έγιναν δοκιμές με  εργαστηριακό ηλεκτρομαγνήτη υψηλής έντασης,  σε διάφορες εντάσεις ρεύματος και ανάλογα μαγνητικά πεδία, σύμφωνα με το νόμο του Gauss. Το περιβάλλον λειτουργίας του μαγνήτη ήταν υγρό και το δείγμα τροφοδοτείτο σε μορφή πολφού. Τέλος έγιναν δοκιμές και σε διαφορετικές κοκκομετρίες καθώς είναι απαραίτητο να υπάρξει η κατάλληλη αποδέσμευση ώστε να έχουμε τα βέλτιστα δυνατά προϊόντα.
   Τα αποτελέσματα έδειξαν πράγματι ότι υπάρχει διαχωρισμός του σφαλερίτη από τα άλλα ορυκτά,  αλλά τόσο η ποιότητα του προϊόντος όσο και η ανάκτηση του δεν μπορούν να συγκριθούν ακόμη με αυτά της επίπλευσης .
MASCOT: Molecular gas depletion times and metallicity gradients -- evidence for feedback in quenching active galaxies
Creators: name: Bertemes, C.
name: Wylezalek, D.
name: Albán, M.
name: Aravena, M.
name: Baker, W. M.
name: Cazzoli, S.
name: Cicone, C.
name: Martín, S.
name: Schimek, A.
name: Wagg, J.
name: Wang, W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present results from the first public data release of the MaNGA-ARO Survey of CO Targets (MASCOT), focussing our study on galaxies whose star-formation rates and stellar masses place them below the ridge of the star-forming Main Sequence. In optically-selected type 2 AGN/LINERs/Composites, we find an empirical relation between gas-phase metallicity gradients $\nabla Z$ and global molecular gas depletion times $t_\mathrm{dep} = M_{H_2}$/SFR with "more quenched" systems showing flatter/positive gradients. Our results are based on the O3N2 metallicity diagnostic (applied to star-forming regions within a given galaxy) which was recently suggested to also be robust against emission by diffuse ionised gas (DIG) and low-ionisation nuclear emission regions (LINERs). We conduct a systematic investigation into possible drivers of the observed $\nabla Z$ - $t_\mathrm{dep}$ relation (ouflows, gas accretion, in-situ star formation, mergers, and morphology). We find a strong relation between $\nabla Z$ or $t_\mathrm{dep}$ and centralised outflow strength traced by the [OIII] velocity broadening. We also find signatures of suppressed star-formation in the outskirts in AGN-like galaxies with long depletion times and an enhancement of metals in the outer regions. We find no evidence of inflows impacting the metallicity gradients, and none of our results are found to be significantly affected by merger activity or morphology. We thus conclude that the observed $\nabla Z$ - $t_\mathrm{dep}$ relation may stem from a combination of metal redistribution via weak feedback, and a connection to in-situ star formation via a resolved mass-metallicity-SFR relation.
description: 23 pages including appendix, 12 figures (+6 in the appendix), accepted for publication in MNRAS
Modeling and semigroup formulation of charge or current-controlled active constrained layer (ACL) beams; electrostatic, quasi-static, and fully-dynamic assumptions
Creators: name: Ozer, Ahmet Ozkan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: A three-layer active constrained layer (ACL) beam model, consisting of a piezoelectric elastic layer, a stiff layer, and a constrained viscoelastic layer, is obtained for cantilevered boundary conditions by using the reduced Rao-Nakra sandwich beam assumptions through a consistent variational approach. The Rao-Nakra sandwich beam assumptions keeps the longitudinal and rotational inertia terms. We consider electrostatic, quasi-static and fully dynamic assumptions due to Maxwell's equations. For that reason, we first include all magnetic effects for the piezoelectric layer. Two PDE models are obtained; one for the charge-controlled case and one for the current-controlled case. These two cases are considered separately since the underlying control operators are very different in nature. For both cases, the semigroup formulations are presented, and the corresponding Cauchy problems are shown to be well- posed in the natural energy space.
description: 2 figures
Time-reversal symmetry breaking in superconducting low-carrier-density quasi-skutterudite Lu3Os4Ge13
Creators: name: Kataria, A.
name: Verezhak, J. A. T.
name: Prakash, O.
name: Kushwaha, R. K.
name: Thamizhavel, A.
name: Ramakrishnan, S.
name: Scheurer, M. S.
name: Hillier, A. D.
name: Singh, R. P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The complex structure of the Remeika phases, the intriguing quantum states they display, and their low carrier concentrations are a strong motivation to study the nature of their superconducting phases. In this work, the microscopic properties of the superconducting phase of single-crystalline Lu$_3$Os$_4$Ge$_{13}$ are investigated by muon-spin relaxation and rotation ($μ$SR) measurements. The zero-field $μ$SR data reveal the presence of spontaneous static or quasi-static magnetic fields in the superconducting state, breaking time-reversal symmetry; the associated internal magnetic field scale is found to be exceptionally large ($\approx$ 0.18~mT). Furthermore, transverse-field $μ$SR measurements in the vortex state of Lu$_3$Os$_4$Ge$_{13}$ imply a complex gap function with significantly different strengths on different parts of the Fermi surface. While our measurements do not completely determine the order parameter, they strongly indicate that electron-electron interactions are essential to stabilizing pairing in the system, thus, demonstrating its unconventional nature.
description: 7 pages, 2 figures
Differences in chemical evolution between isolated and embedded prestellar cores
Creators: name: Priestley, F. D.
name: Whitworth, A. P.
name: Fogerty, E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Models of prestellar cores often assume that the cores are isolated from their environment - material outside the core boundary plays no role in the subsequent evolution. This is unlikely to be the case in reality, where cores are located within hierarchically substructured molecular clouds. We investigate the dynamical and chemical evolution of prestellar cores, modelled as Bonnor-Ebert spheres, and show that the density of the ambient medium has a large impact on the resulting chemical properties of the cores. Models embedded in high-density, low-temperature surroundings have greatly enhanced abundances of several molecules, such as CO and CS, compared to models with more diffuse surroundings, corresponding to relatively isolated cores. The predicted intensities and profile shapes of molecular lines are also affected. The density of the ambient medium has a stronger effect on the chemical evolution than whether the cores are initially in or out of equilibrium. This suggests that the impact of environment cannot be neglected when modelling chemistry in prestellar cores; the results of these models are highly sensitive to the assumptions made about the core surroundings.
description: 7 pages, 5 figures. MNRAS accepted
Approximating Vizing's independence number conjecture
Creators: name: Steffen, Eckhard
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15

description: In 1965, Vizing conjectured that the independence ratio of edge-chromatic critical graphs is at most $\frac{1}{2}$. We prove that for every $ε> 0$ this conjecture is equivalent to its restriction on a specific set of edge-chromatic critical graphs with independence ratio smaller than $\frac{1}{2} + ε$.
description: Revised version: The title is changed
The Hasse principle for systems of diagonal cubic forms
Creators: name: Bruedern, Joerg
name: Wooley, Trevor D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11D72, 11P55, 11E76

description: We establish the Hasse Principle for systems of r simultaneous diagonal cubic equations whenever the number of variables exceeds 6r and the associated coefficient matrix contains no singular r x r submatrix, thereby achieving the theoretical limit of the circle method for such systems.
description: 18pp; Section 2 revised to address referee comments
Margaret J. Winkler
Creators: name: Cook, Malcolm
Publisher: name: Columbia University
Year: 2020
Subjects: Women in the motion picture industry
Motion pictures
Silent films

description: As the leading distributor of animated cartoons in the 1920s, Margaret J. Winkler played a pivotal role in the professionalization of the animation industry. Her company, M. J. Winkler, distributed and financed several of the most significant animated series of the period, including Pat Sullivan and Otto Messmer’s Felix the Cat, the Fleischer brothers’ Out of the Inkwell, and Disney’s Alice Comedies. (“Disney” here and throughout refers to the Disney Brothers Studio. Walt Disney as an individual will be referred to by first and last name.) Winkler’s management of these series shaped their development in both economic and aesthetic terms. Unfortunately, after her marriage to Charles Mintz at the end of 1923, her involvement in the business declined, and by 1926 she had retired from the film industry following the birth of their two children.
Broadband and energy-concentrating terahertz coherent perfect absorber based on a self-complementary metasurface
Creators: name: Urade, Yoshiro
name: Nakata, Yosuke
name: Nakanishi, Toshihiro
name: Kitano, Masao
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate that a self-complementary checkerboard-like metasurface works as a broadband coherent perfect absorber (CPA) when symmetrically illuminated by two counter-propagating incident waves. A theoretical analysis based on wave interference and results of numerical simulations of the proposed metasurface are provided. In addition, we experimentally demonstrate the proposed CPA in the terahertz regime by using a time-domain spectroscopy technique. We observe that the metasurface can work as a CPA below its lowest diffraction frequency. The size of the absorptive areas of the proposed CPA can be much smaller than the incident wavelength. Unlike conventional CPAs, the presented one simultaneously achieves the broadband operation and energy concentration of electromagnetic waves at the deep-subwavelength scale.
description: 5 pages, 4 figures
Global, European, National and Local Citizen Science movements - the Citizen Science Lab and the EU Mutual Learning Exchange on CS
Creators: name: Gold, Margaret
Publisher: name: Zenodo
Year: 2022
Subjects: Citizen Science, Open Science

description: Talk given at the UKRI Event on Citizen Science for Policy and Practice Participatory research, citizen science and its impact on policy and practice. Includes international speakers, case studies and networking. 20 October 2022. In this talk, Margaret Gold gave a presentation of the movements to embed Citizen Science within Open Science at various levels, via UNESCO, the European Commission, nationally in the Netherlands, and locally in Leiden - with a focus on the Mutual Learning Exercise on Citizen Science of the EC Policy Support Facility, and the topic of Enabling Environments - what is needed to support and sustain CS practices.
title: Κινητικό μοντέλο λειοτρίβησης μαρμάρου σε σφαιρόμυλο
Creators: name: Τσουκαλου Αμαλια
Publisher: name: Technical University of Crete
Year: 2016

description: Η μελέτη της διαδικασίας της λειοτρίβησης απασχολεί εδώ και χρόνια πολλούς ερευνητές. Είναι μια διαδικασία που χρειάζεται υψηλή κατανάλωση  ενέργειας ανά μονάδα βάρους του υλικού που λειοτριβείται. Η έρευνα εστιάζεται γύρω από τις συνθήκες λειοτρίβησης οι οποίες επικρατούν στις μηχανές λειοτρίβησης. Στόχος των ερευνών είναι να βρεθούν οι βέλτιστες συνθήκες, ώστε να καταστήσουν τη διαδικασία αποδοτική. Για αυτό το λόγο διεξάγονται πειράματα σε εργαστηριακό επίπεδο αλλάζοντας κάθε φορά τις επικρατούσες συνθήκες.
 Στην παρούσα διπλωματική εργασία έγινε εφαρμογή κινητικού μοντέλου στη λειοτρίβηση μαρμάρου σε σφαιρόμυλο. Για την εκτέλεση των πειραμάτων δημιουργήθηκαν 4 στενά κοκκομετρικά κλάσματα με λόγο √2 τα οποία λειοτριβήθηκαν το κάθε ένα για 4 διαφορετικούς χρόνους και με τρείς διαφορετικές διαμέτρους σφαιρών.
Από τα διαγράμματα του αθροιστικώς διερχόμενου βάρους (%) σε σχέση με το μέγεθος του προϊόντος και για κάθε διάμετρο σφαιρών προέκυψε ότι με τη χρήση σφαιρών μεγάλης διαμέτρου λειοτριβούνται περισσότερο χονδρύτερα κλάσματα. Η χρήση σφαιρών μικρότερης διαμέτρους έδωσε το αντίθετο αποτέλεσμα. Επίσης, από τα ίδια διαγράμματα υπολογίστηκε το μέγεθος D80 το οποίο είναι το άνοιγμα της βροχίδας κοσκίνου από το οποίο διέρχεται το 80% του υλικού. Έπειτα έγιναν διαγράμματα του μεγέθους D80 σε συνάρτηση με την ειδική ενέργεια, για κάθε διάμετρο σφαίρας. Από τα διαγράμματα αυτά προέκυψε ότι για την ίδια τιμή της ειδικής ενέργειας και για χονδρά κοκκομετρικά κλάσματα τροφοδοσίας, όταν χρησιμοποιούνται σφαίρες μεγάλης διαμέτρου, το μέγεθος D80 είναι μικρότερο σε σχέση με το μέγεθος D80 που προκύπτει όταν χρησιμοποιούνται σφαίρες μικρής διαμέτρου. Το αντίθετο συμβαίνει όταν η τροφοδοσία αποτελείται από λεπτά κοκκομετρικά κλάσματα. Για τη μελέτη του ειδικού ρυθμού θραύσης σε σχέση με το μέγεθος της σφαίρας, για κάθε κλάσμα τροφοδοσίας, έγιναν διαγράμματα του παραμένοντος βάρους (%) σε κάθε τάξη μεγέθους σε συνάρτηση με το χρόνο λειοτρίβησης. Από τα διαγράμματα αυτά υπολογίστηκε ο ειδικός ρυθμός θραύσης από τη κλίση των ευθειών που προέκυπταν.
Έπειτα, χρησιμοποιήθηκε το μοντέλο ισοζύγιου πληθυσμού όπου δίνει τη σχέση μεταξύ ειδικού ρυθμού θραύσης και μεγέθους τροφοδοσίας. Μέσω του προγράμματος solver του excel έγινε προσπάθεια να βρεθούν οι βέλτιστες τιμές των παραμέτρων που θα ελαχιστοποιούν το σφάλμα ανάμεσα στις πειραματικές μετρήσεις με στις μετρήσεις του μοντέλου.
Τέλος, από το διάγραμμα ειδικού ρυθμού θραύσης σε σχέση με το μέγεθος τροφοδοσίας προέκυψε ότι καθώς αυξάνεται το μέγεθος, αυξάνεται και ο ειδικός ρυθμός θραύσης. Έπειτα φθάνει σε μία μέγιστη τιμή όπου αντιστοιχεί και σε ένα μέγιστο μέγεθος και από εκεί και πέρα αρχίζει να μειώνεται. Αυτό συμβαίνει λόγω του ότι τα μέσα λειοτρίβησης δεν μπορούν να λειοτριβήσουν αποδοτικά το υλικό από ένα μέγεθος και έπειτα.
Radiative Transfer as a Bayesian Linear Regression problem
Creators: name: De Ceuster, Frederik
name: Ceulemans, Thomas
name: Cockayne, Jon
name: Decin, Leen
name: Yates, Jeremy
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Electromagnetic radiation plays a crucial role in various physical and chemical processes. Hence, almost all astrophysical simulations require some form of radiative transfer model. Despite many innovations in radiative transfer algorithms and their implementation, realistic radiative transfer models remain very computationally expensive, such that one often has to resort to approximate descriptions. The complexity of these models makes it difficult to assess the validity of any approximation and to quantify uncertainties on the model results. This impedes scientific rigour, in particular, when comparing models to observations, or when using their results as input for other models. We present a probabilistic numerical approach to address these issues by treating radiative transfer as a Bayesian linear regression problem. This allows us to model uncertainties on the input and output of the model with the variances of the associated probability distributions. Furthermore, this approach naturally allows us to create reduced-order radiative transfer models with a quantifiable accuracy. These are approximate solutions to exact radiative transfer models, in contrast to the exact solutions to approximate models that are often used. As a first demonstration, we derive a probabilistic version of the method of characteristics, a commonly-used technique to solve radiative transfer problems.
description: 16 pages, 1 figure, accepted to Monthly Notices of the Royal Astronomical Society (MNRAS)
Vortex solitons in quasi-phase-matched photonic crystals
Creators: name: Zhao, Feiyan
name: Xu, Xiaoxi
name: He, Hexiang
name: Zhang, Li
name: Zhou, Yangui
name: Chen, Zhaopin
name: Malomed, Boris A.
name: Li, Yongyao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We report solutions for stable compound solitons in a three-dimensional quasi-phase-matched photonic crystal with the quadratic ($χ^{(2)}$) nonlinearity. The photonic crystal is introduced with a checkerboard structure, which can be realized by means of the available technology. The solitons are built as four-peak vortex modes of two types, rhombuses and squares (intersite- and onsite-centered self-trapped states, respectively). Their stability areas are identified in the system's parametric space (rhombuses occupy an essentially broader stability domain), while all bright vortex solitons are subject to strong azimuthal instability in uniform $χ^{(2)}$ media. Possibilities for experimental realization of the solitons are outlined.
description: 6 pages, 6 figures, 55 references, Physical Review Letters, in press
Identifying and Characterizing the Most Heavily Dust-Obscured Galaxies at $1 \le z \le 4$
Creators: name: Martis, Nicholas S.
name: Marchesini, Danilo M.
name: Muzzin, Adam
name: Willot, Chris J.
name: Sawicki, Marcin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present 65 extremely dust-obscured galaxies from the UltraVISTA DR3 survey of the COSMOS field at $1
description: Accepted for publication in MNRAS
Maintaining Quality of Pea Beans during Shipment Overseas
Creators: name: Thompson, Judson A.
name: Sefcovic, Methodius S.
name: Kingsolver, C. H.
name: Thompson, Judson A.
name: Sefcovic, Methodius S.
name: Kingsolver, C. H.
Publisher: name: Unknown
Year: 1962
Subjects: subject: Crop Production/Industries
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods

description: Excerpts from the report: We must deliver beans of higher quality if we are to retain and expand our European market for dry beans. The ways of loading and unloading the beans shipped overseas and conditions in the holds of the ships must be improved for higher quality and less container breakage. Three ships were loaded with dry Pea (Navy) beans and other cargo at Detroit, Mich., in June. Each ship was equipped with electrical devices located among the bags of beans in the holds to make continuous recordings of moisture and temperature changes throughout the voyage to western Europe. One of the authors accompanied one of the ships and checked conditions in the hold daily. He met each of the other ships as it arrived in Europe and observed unloading and storage of the beans in Europe. This report is a compilation of the data and findings in the ships during their 22-25 days of ocean voyage and of observations concerning storage in Europe.
A scaling law beyond Zipf's law and its relation to Heaps' law
Creators: name: Font-Clos, Francesc
name: Boleda, Gemma
name: Corral, Álvaro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: The dependence with text length of the statistical properties of word occurrences has long been considered a severe limitation quantitative linguistics. We propose a simple scaling form for the distribution of absolute word frequencies which uncovers the robustness of this distribution as text grows. In this way, the shape of the distribution is always the same and it is only a scale parameter which increases linearly with text length. By analyzing very long novels we show that this behavior holds both for raw, unlemmatized texts and for lemmatized texts. For the latter case, the word-frequency distribution is well fit by a double power law, maintaining the Zipf's exponent value $γ\simeq 2$ for large frequencies but yielding a smaller exponent in the low frequency regime. The growth of the distribution with text length allows us to estimate the size of the vocabulary at each step and to propose an alternative to Heaps' law, which turns out to be intimately connected to Zipf's law, thanks to the scaling behavior.
description: Final version, to appear in NJP
Isochrone fitting of Galactic globular clusters -- IV. NGC6362 and NGC6723
Creators: name: Gontcharov, George A.
name: Khovritchev, Maxim Yu.
name: Mosenkov, Aleksandr V.
name: Il'in, Vladimir B.
name: Marchuk, Alexander A.
name: Poliakov, Denis M.
name: Ryutina, Olga S.
name: Savchenko, Sergey S.
name: Smirnov, Anton A.
name: Usachev, Pavel A.
name: Lee, Jae-Woo
name: Camacho, Conner
name: Hebdon, Noah
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present new isochrone fits to the colour-magnitude diagrams of the Galactic globular clusters NGC\,6362 and NGC\,6723. We utilize 22 and 26 photometric filters for NGC\,6362 and NGC\,6723, respectively, from the ultraviolet to mid-infrared using data sets from {\it HST}, {\it Gaia}, unWISE, and other photometric sources. We use models and isochrones from the Dartmouth Stellar Evolution Database (DSED) and Bag of Stellar Tracks and Isochrones (BaSTI) for $α$-enhanced [$α$/Fe]$=+0.4$ and different helium abundances. The metallicities [Fe/H]$=-1.04\pm0.07$ and $-1.09\pm0.06$ are derived from the red giant branch slopes in our fitting for NGC\,6362 and NGC\,6723, respectively. They agree with spectroscopic estimates from the literature. We find a differential reddening up to $ΔE(B-V)=0.13$ mag in the NGC\,6723 field due to the adjacent Corona Australis cloud complex. We derive the following for NGC\,6362 and NGC\,6723, respectively: distances $7.75\pm0.03\pm0.15$ (statistic and systematic error) and $8.15\pm0.04\pm0.15$ kpc; ages $12.0\pm0.1\pm0.8$ and $12.4\pm0.1\pm0.8$ Gyr; extinctions $A_\mathrm{V}=0.19\pm0.04\pm0.06$ and $0.24\pm0.03\pm0.06$ mag; reddenings $E(B-V)=0.056\pm0.01\pm0.02$ and $0.068\pm0.01\pm0.02$ mag. DSED provides systematically lower [Fe/H] and higher reddenings than BaSTI. However, the models agree in their relative estimates: NGC\,6723 is $0.44\pm0.04$ kpc further, $0.5\pm0.1$ Gyr older, $ΔE(B-V)=0.007\pm0.002$ more reddened, and with $0.05\pm0.01$ dex lower [Fe/H] than NGC\,6362. The lower metallicity and greater age of NGC\,6723 with respect to NGC\,6362 explain their horizontal branch morphology difference. This confirms age as the second parameter for these clusters. We provide lists of the cluster members from the {\it Gaia} Data Release 3.
description: Accepted to be published in MNRAS, 20 pages, 3 online tables