cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Testing velocity kinks as a planet-detection method: Do velocity kinks in surface gas emission trace planetary spiral wakes in the midplane continuum?
Creators: name: Speedie, Jessica
name: Dong, Ruobing
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Spiral density waves generated by an embedded planet are understood to cause ``kinks'' in observed velocity channel maps of CO surface emission, by perturbing the gas motion within the spiral arms. If velocity kinks are a reliable probe of embedded planets, we should expect to see the planet-driven spiral arms in other observational tracers. We test this prediction by searching the dust continuum for the midplane counterparts of the spirals responsible for all of the velocity kink planet candidates reported to date, whose orbits lie inside the dust continuum disk. We find no clear detection of any spiral structure in current continuum observations for 6 of the 10 velocity kink planet candidates in our sample (DoAr 25, GW Lup, Sz 129, HD 163296 #2, P94, and HD 143006), despite the high planet masses inferred from the kink amplitude. The remaining 4 cases include 3 clear detections of two-armed dust spirals (Elias 27, IM Lup and WaOph 6) wherein neither spiral arm aligns with a wake originating from reported planet location, suggesting that under the planetary-origin hypothesis, an accurate method for inferring the location of the planet in the midplane may need to encompass vertical effects. The 10th case, HD 97048, is inconclusive with current knowledge of the disk geometry.
description: 5 figures, 13 pages. Accepted for publication in ApJ Letters. Supplementary material available at https://doi.org/10.6084/m9.figshare.21330426
Demo tape by unidentified artist
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Can You Please Crawl Out Your Window," "I'll Keep It With Mine," "California Lyrics," "Moonshiner," "Only a Hobo," "Who Killed Davey Moore," "Percy's Song," "Lay Down Your Weary Tune, Lay Down," and " by Bob Dylan plays.
Tetragonal Mexican-Hat Dispersion and Switchable Half-Metal State with Multiple Anisotropic Weyl Fermions in Penta-Graphene
Creators: name: Jia, Ningning
name: Shi, Yongting
name: Lv, Zhiheng
name: Qin, Junting
name: Cai, Jiangtao
name: Jiang, Xue
name: Zhao, Jijun
name: Liu, Zhifeng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In past decades, the ever-expanding library of 2D carbon allotropes has yielded a broad range of exotic properties for the future carbon-based electronics. However, the known allotropes are all intrinsic nonmagnetic due to the paired valence electrons configuration. Based on the reported 2D carbon structure database and first-principles calculations, herein we demonstrate that inherent ferromagnetism can be obtained in the prominent allotrope, penta-graphene, which has an unique Mexican-hat valence band edge, giving rise to van Hove singularities and electronic instability. Induced by modest hole-doping, being achievable in electrolyte gate, the semiconducting pentagraphene can transform into different ferromagnetic half-metals with room temperature stability and switchable spin directions. In particular, multiple anisotropic Weyl states, including type-I and type-II Weyl cones and hybrid quasi Weyl nodal loop, can be found in a sizable energy window of spin-down half-metal under proper strains. These findings not only identify a promising carbon allotrope to obtain the inherent magnetism for carbon-based spintronic devices, but highlight the possibility to realize different Weyl states by combining the electronic and mechanical means as well.
“The Most Unwanted Musical”: A New Methodology for Crowdsourcing Content Towards the Creation of Musical Theatre
Creators: name: Brown, Josh
Publisher: name: Columbia University
Year: 2020
Subjects: Theater
Drama--Technique
Musical theater

description: My thesis was inspired by a series of artworks called "People's Choice" by Komar & Melamid. I interviewed 19 of my closest friends and family to ask what they would most hate to see in a musical. Based on all of that data, I have written the book & lyrics of a musical that contains every single thing they said that they would hate.
title: Επανάχρηση του εγκαταλελειμμένου αεροδρομίου της Λευκωσίας ως κομβικό σημείο μάθησης και καταλύτης για την ώσμωση των δυο κοινοτήτων
Creators: name: Χρυσοστομου Κωνσταντινα
Publisher: name: Technical University of Crete
Year: 2015

description: Το θέμα της διπλωματικής εργασίας αποτελεί συνέχεια και εφαρμογή της ερευνητικής εργασίας. Η επανάχρηση του αεροδρομίου της Λευκωσίας που βρίσκεται στην νεκρή ζώνη εδώ και 40 χρόνια, μετατρέπεται σε ένα πρότυπο δικοινοτικό σχολείο για παιδιά από 3 -18 χρονών. Ένα από τα συμπεράσματα της ερευνητικής εργασίας ήταν ότι προκειμένου να ενοποιηθεί χωρικά η χώρα, θα πρέπει πρώτα αυτό να πραγματοποιηθεί σε κοινωνικό επίπεδο. Επομένως θα πρέπει να επικεντρωθούμε στις ηλικιακές ομάδες 3-18 και 60+ καθώς οι πρώτοι δεν έχουν επηρεαστεί ακόμη από τις πολιτικές καταστάσεις, ενώ οι δεύτεροι ζούσαν μαζί με τους "άλλους" πριν από τον πόλεμο.  Το σχολείο προτίθεται να λειτουργήσει ως σημείο κοινωνικής και χωρικής συρραφής συνδέοντας τα δυο τμήματα εκατέρωθεν της νεκρής ζώνης. Την ίδια στιγμή δίνεται η δυνατότητα στους μαθητές και από τις δυο κοινότητες να έρθουν σε επαφή και να μάθουν ο ένας από τον άλλον γεφυρώνοντας  το πολιτισμικό χάσμα που δημιουργήθηκε από τον πόλεμο.
Στο σχολείο Ελληνοκύπριοι και Τουρκοκύπριοι θα διδάσκονται ταυτόχρονα στις ίδιες αίθουσας και στις δυο γλώσσες. Ακόμη το σχολείο θα λειτουργεί με την μέθοδο Μοντεσόρι όπου οι μεγαλύτεροι θα βοηθούν τους νεότερους δυναμώνοντας τις μεταξύ τους σχέσεις.
Η επέμβαση στο κτίριο είχε ως στόχο την δημιουργία κοινόχρηστων χώρων που θα προωθούν και θα εμπνέουν την συζήτηση και την ενεργό συμμετοχή σε κοινές δραστηριότητες. Προκειμένου αυτό το πρόγραμμα να θέσει γερές βάσεις και να λειτουργήσει μακροπρόθεσμα, οι γονείς θα πρέπει να βοηθήσουν σε αυτή την προσπάθεια. Γι' αυτό, δημιουργήθηκαν χώροι όπου οι γονείς και από τις δυο πλευρές θα μπορούν να μοιραστούν τα ενδιαφέροντα τους, γνωρίζοντας ο ένας τον άλλον. Επίσης, ο διάδρομος προσγείωσης και απογείωσης έχει μετατραπεί σε μητροπολιτικό πάρκο, με προσβασιμότητα και απο τους Τουρκοκύπριους και Ελληνοκύπριους, δίνοντας τους την ευκαιρία να συνυπάρξουν στον ίδιο χώρο, επαναπροσδιορίζοντας τις μεταξύ τους σχέσεις.
Εν κατακλείδι, το αεροδρόμιο, αποτελεί ένα χώρο διαρκούς κίνησης και σημείο συνάντησης πολιτισμών και κουλτούρων. Το σχολείο είναι ένας χώρος μάθησης, ανταλλαγής ιδεών και πληροφοριών. Σε αυτή περίπτωση το σχολείο χρησιμοποιεί το κτίριο του αεροδρομίου και λειτουργεί ως παράσιτο στην κοινωνική προκατάληψη, διατηρώντας απαράλλακτη την ιδέα του κέντρου συνάντησης ιδεών και πολιτισμών.
Conditional Independence Testing with Heteroskedastic Data and Applications to Causal Discovery
Creators: name: Günther, Wiebke
name: Ninad, Urmi
name: Wahl, jonas
name: Runge, Jakob
Publisher: name: arXiv
Year: 2023
Subjects: subject: Methodology (stat.ME)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Conditional independence (CI) testing is frequently used in data analysis and machine learning for various scientific fields and it forms the basis of constraint-based causal discovery. Oftentimes, CI testing relies on strong, rather unrealistic assumptions. One of these assumptions is homoskedasticity, in other words, a constant conditional variance is assumed. We frame heteroskedasticity in a structural causal model framework and present an adaptation of the partial correlation CI test that works well in the presence of heteroskedastic noise, given that expert knowledge about the heteroskedastic relationships is available. Further, we provide theoretical consistency results for the proposed CI test which carry over to causal discovery under certain assumptions. Numerical causal discovery experiments demonstrate that the adapted partial correlation CI test outperforms the standard test in the presence of heteroskedasticity and is on par for the homoskedastic case. Finally, we discuss the general challenges and limits as to how expert knowledge about heteroskedasticity can be accounted for in causal discovery.
Adiabatic-impulse approximation in non-Hermitian Landau-Zener Model
Creators: name: Tong, Xianqi
name: Xianlong, Gao
name: Kou, Su-peng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the transition from PT-symmetry to PT-symmetry breaking and vice versa in the non-Hermitian Landau-Zener (LZ) models. The energy is generally complex, so the relaxation rate of the system is set by the absolute value of the gap. To illustrate the dynamics of phase transitions, the relative population is introduced to calculate the defect density in nonequilibrium phase transitions instead of the excitations in the Hermitian systems. The result shows that the adiabatic-impulse (AI) approximation, which is the key concept of the Kibble-Zurek (KZ) mechanism in the Hermitian systems, can be generalized to the PT-symmetric non-Hermitian LZ models to study the dynamics in the vicinity of a critical point. Therefore, the KZ mechanism in the simplest non-Hermitian two-level models is presented. Finally, an exact solution to the non-Hermitian LZ-like problem is also shown.
description: 11 pages, 3 figures
Utilizing literature-based rodent toxicology data to derive potency estimates for quantitative risk assessment
Creators: name: Boots, Theresa E.
name: Kogel, Alyssa M.
name: Drew, Nathan M.
name: Kuempel, Eileen D.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biochemistry
subject: Space Science
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Inorganic Chemistry
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Evaluating the potential occupational health risk of engineered nanomaterials is an ongoing need. The objective of this meta-analysis, which consisted of 36 studies containing 86 materials, was to assess the availability of published in vivo rodent pulmonary toxicity data for a variety of nanoscale and microscale materials and to derive potency estimates via benchmark dose modeling. Additionally, the potency estimates based on particle mass lung dose associated with acute pulmonary inflammation were used to group materials based on toxicity. The commonalities among the physicochemical properties of the materials in each group were also explored. This exploration found that a material’s potency tended to be associated primarily with the material class based on chemical composition and form (e.g. carbon nanotubes, TiO2, ZnO) rather than with particular physicochemical properties. Limitations in the data available precluded a more extensive analysis of these associations. Issues such as data reporting and appropriate experimental design for use in quantitative risk assessment are the main reasons publications were excluded from these analyses and are discussed.
Hausdorff dimension estimates for restricted families of projections in $\mathbb{R}^3$
Creators: name: Orponen, Tuomas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: This paper is concerned with restricted families of projections in $\mathbb{R}^{3}$. Let $K \subset \mathbb{R}^{3}$ be a Borel set with Hausdorff dimension $\dim K = s > 1$. If $\mathcal{G}$ is a smooth and sufficiently well-curved one-dimensional family of two-dimensional subspaces, the main result states that there exists $σ(s) > 1$ such that $\dim π_{V}(K) \geq σ(s)$ for almost all $V \in \mathcal{G}$. A similar result is obtained for some specific families of one-dimensional subspaces.
description: 33 pages, 3 figures. v3: incorporated reviewer comments, to appear in Adv. Math
Demo tape by unidentified artist
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Go Back Where You Stayed Last Night," 'Down Home Blues," "Organ Grinder Blues," and "West End Blues" by Ethel Waters play. "Squeeze Me" and "Foolish Man Blues," by Bessie Smith play. "Percolatin' Blues" by Clara Smith plays.
MVAPP – Multivariate analysis application for streamlined data analysis and curation
Creators: name: Julkowska, Magdalena
name: Saade, Stephanie
name: Agarwal, Gaurav
name: Gao, Ge
name: Pailles, Yveline
name: Morton, Mitchell
name: Awlia, Mariam
name: Tester, Mark
Publisher: name: figshare
Year: 2019
Subjects: classificationCode: 310299
subject: Bioinformatics and computational biology not elsewhere classified
classificationCode: 380205
subject: Time-series analysis
classificationCode: 300207
subject: Agricultural systems analysis and modelling

description: The revised and peer-reviewed version of this paper was published Open Access in Plant Physiology on May 2019 - please cite > DOI: https://doi.org/10.1104/pp.19.00235

Modern phenotyping enables the measurement of many phenotypic traits simultaneously, yielding vast amounts of quantitative data that is hard to manage and analyze. This type of data, when adequately examined, could reveal genotype-to-phenotype relationships and meaningful relationships between individual measured traits. Efficient data mining is currently challenging for experimental biologists, as many researchers are limited by their ability to curate, integrate and explore these complex outputs. Additionally, data transparency, accessibility and reproducibility have become important considerations for scientific publication. Thus, the need for a streamlined pipeline for curating phenotypic data is now more pressing than in the past. To address that need, we developed an open-source online platform for multivariate analysis, MVApp, which allows interactive data curation, in-depth data analysis and customized visualization. MVApp was developed in R using the Shiny framework, combining several functional R modules into a comprehensive toolkit that can be used without any prior knowledge of R, programming or advanced statistics. MVApp aims to enhance data transparency, standardize and facilitate phenotypic data curation and increase statistical literacy among the scientific community. Given that contributions from users in this open-source environment is encouraged, MVApp can be continuously updated and expanded to facilitate the analysis of high-throughput phenotyping outputs.
title: Το μετόχι ως συνιστώσα παραγωγής του αγροτικού χώρου στην Κρήτη. Η περίπτωση του μετοχιού Ησυχάκη στον Αλικιανό
Creators: name: Χριστακη Αγγελικη
Publisher: name: Technical University of Crete
Year: 2015

description: Η αγροτική οικονομία στην Ελλάδα και συγκεκριμένα στην Κρήτη εξελίχθηκε μέσα από το πέρασμα των αιώνων και διαμορφώθηκε ανάλογα από τον εκάστοτε κατακτητή. Ο αγροτικός χώρος αντίστοιχα, εξελίχθηκε σε αυτό που είναι σήμερα, μέσω συγκεκριμένων οικονομικών μηχανισμών. Σε αυτή την εξέλιξη συνέβαλαν τα σημερινά μετόχια που αποτέλεσαν το μέσο αλλά και τη βάση για τη σύσταση της αγροτικής οικονομίας.
Μέσα σε αυτό τον κόσμο της εξουσίας και της εδραίωσης της κατάκτησης διαμορφώθηκαν χωρικά σύνολα που μπορούσαν να ικανοποιήσουν και να καταστήσουν δυνατά όλα τα παραπάνω. Αυτά τα χωρικά σύνολα ήταν με χρονολογική σειρά, η πρόνοια επί Βυζαντινής Αυτοκρατορίας, το φέουδο επί Ενετοκρατίας, το τσιφλίκι επί Τουρκοκρατίας και το μετόχι από τον 20ο αιώνα και έπειτα.
Effective observables for electromagnetic duality from novel amplitude decomposition
Creators: name: Pavao, Nicolas H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We introduce a decomposition of D-dimensional vector amplitudes in terms of building blocks that preserve all partial amplitude relations of the parent gauge-theory. Using this decomposition, we derive a new set of amplitude relations between nonlinear sigma model pions and the pure-scalar sector of Yang-Mills-scalar theory. These new relations indicate an equivalence between Born-Infeld duality invariance and that of Einstein-Maxwell theory, considering their known double-copy construction from the two scalar theories with Yang Mills. This observation motivates a general framework for constructing duality-invariant effective field theory observables at any multiplicity using the building blocks in our amplitude decomposition. Finally, we conjecture a subtle relationship between these duality-invariant building blocks and the bosonic sector of N=4 super Yang-Mills.
description: 11 pages, matches journal version
An Atmospheric Retrieval of the Brown Dwarf Gliese 229B
Creators: name: Calamari, Emily
name: Faherty, Jacqueline K.
name: Burningham, Ben
name: Gonzales, Eileen
name: Bardalez-Gagliuffi, Daniella
name: Vos, Johanna M.
name: Gemma, Marina
name: Whiteford, Niall
name: Gaarn, Josefine
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present results from an atmospheric retrieval analysis of Gl 229B using the BREWSTER retrieval code. We find the best fit model to be cloud-free, consistent with the T dwarf retrieval work of Line et al. 2017, Zalesky et al. 2022 and Gonzales et al. 2020. Fundamental parameters (mass, radius, log(L_{Bol}/L_{Sun}), log(g)) determined from our model agree within 1σto SED-derived values except for T_{eff} where our retrieved T_{eff} is approximately 100 K cooler than the evolutionary model-based SED value. We find a retrieved mass of 50^{+12}_{-9} M_{Jup}, however, we also find that the observables of Gl 229B can be explained by a cloud-free model with a prior on mass at the dynamical value, 70 M_{Jup}. We are able to constrain abundances for H_2O, CO, CH_4, NH_3, Na and K and find a supersolar C/O ratio as compared to its primary, Gl 229A. We report an overall subsolar metallicity due to atmospheric oxygen depletion but find a solar [C/H], which matches that of the primary. We find that this work contributes to a growing trend in retrieval-based studies, particularly for brown dwarfs, toward supersolar C/O ratios and discuss the implications of this result on formation mechanisms, internal physical processes as well as model biases.
description: 26 pages, 8 tables, 8 figures. Accepted for publication in ApJ
Hubbard subbands and superconductivity in the infinite-layer nickelate
Creators: name: Plienbumrung, Tharathep
name: Daghofer, Maria
name: Schmid, Michael T.
name: Oleś, Andrzej M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: An effective two-dimensional two-band model for infinite-layer nickelates consists of bands obtained from $d_{x^2-y^2}$ and $s$--like orbitals. We investigate whether it could be mapped onto a single-band Hubbard model and the filling of Hubbard bands. We find that both one-band physics and a Kondo-lattice regime emerge from the same two-orbital model, depending on the strength of electronic correlations and the filling of the itinerant $s$-band. Next we investigate one-particle excitations by changing the screening. First, for weak screening the strong correlations push electrons out of the $s$-band so that the undoped nickelate is similar to a cuprate. Second, for strong screening the $s$ and $d_{x^2-y^2}$ bands are both partly filled and weakly couple. Particularly in this latter regime mapping to a one-band model gives significant spectral weight transfer between the Hubbard subbands. Finally we point out that the superconducting phases may have either $d$-wave or $s$-wave symmetry.
description: 6 pages, 5 figures, conference. arXiv admin note: substantial text overlap with arXiv:2208.03287
The Merger Fraction of Ultramassive White Dwarfs
Creators: name: Kilic, Mukremin
name: Moss, Adam G.
name: Kosakowski, Alekzander
name: Bergeron, P.
name: Conly, Annamarie A.
name: Brown, Warren R.
name: Toonen, Silvia
name: Williams, Kurtis A.
name: Dufour, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We search for merger products among the 25 most massive white dwarfs in the Montreal White Dwarf Database 100 pc sample through follow-up spectroscopy and high-cadence photometry. We find an unusually high fraction, 40%, of magnetic white dwarfs among this population. In addition, we identify four outliers in transverse velocity and detect rapid rotation in five objects. Our results show that $56^{+9}_{-10}$\% of the $M\approx1.3~M_{\odot}$ ultramassive white dwarfs form through mergers. This fraction is significantly higher than expected from the default binary population synthesis calculations using the $α$-prescription (with $αλ= 2$), and provides further support for efficient orbital shrinkage, such as with low values of the common envelope efficiency.
description: MNRAS, in press
Software Engineers' Questions and Answers on Stack Exchange
Creators: name: Sulír, Matúš
name: Regeci, Marcel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: There exists a large number of research works analyzing questions and answers on the popular Stack Overflow website. However, other sub-sites of the Stack Exchange platform are studied rarely. In this paper, we analyze the questions and answers on the Software Engineering Stack Exchange site that encompasses a broader set of areas, such as testing or software processes. Topics and quantities of the questions, historical trends, and the authors' sentiment were analyzed using downloaded datasets. We found that the asked questions are most frequently related to database systems, quality assurance, and agile software development. The most attractive topics were career and teamwork problems, and the least attractive ones were network programming and software modeling. Historically, the topic of domain-driven design recorded the highest rise, and jobs and career the most significant fall. The number of new questions dropped, while the portion of unanswered ones increased.
Mock Observations of Blue Stragglers in Globular Cluster Models
Creators: name: Sills, Alison
name: Glebbeek, Evert
name: Chatterjee, Sourav
name: Rasio, Frederic A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We created artificial color-magnitude diagrams of Monte Carlo dynamical models of globular clusters, and then used observational methods to determine the number of blue stragglers in those clusters. We compared these blue stragglers to various cluster properties, mimicking work that has been done for blue stragglers in Milky Way globular clusters to determine the dominant formation mechanism(s) of this unusual stellar population. We find that a mass-based prescription for selecting blue stragglers will choose approximately twice as many blue stragglers than a selection criterion that was developed for observations of real clusters. However, the two numbers of blue stragglers are well-correlated, so either selection criterion can be used to characterize the blue straggler population of a cluster. We confirm previous results that the simplified prescription for the evolution of a collision or merger product in the BSE code overestimates their lifetimes. We show that our model blue stragglers follow similar trends with cluster properties (core mass, binary fraction, total mass, collision rate) as the true Milky Way blue stragglers, as long as we restrict ourselves to model clusters with an initial binary fraction higher than 5%. We also show that, in contrast to earlier work, the number of blue stragglers in the cluster core does have a weak dependence on the collisional parameter Gamma in both our models and in Milky Way globular clusters.
description: 7 pages, 6 figures; accepted by The Astrophysical Journal
Der Einfluss kultureller Belange im Energiesektor: Spannungsverhältnis zwischen dem gestiegenem Energiebedarf und Kulturschutz
Creators: name: Froehlich, Annette
Publisher: name: Kunstrechtsspiegel
Year: 2017

description: -
description: Kunstrechtsspiegel, Nr. 4 (2009): Kunstrechtsspiegel
Experimental and theoretical thermodynamic studies in Ba$_2$MgReO$_6$ -- the ground state in the context of Jahn-Teller effect
Creators: name: Pásztorová, Jana
name: Tehrani, Aria Mansouri
name: Živković, Ivica
name: Spaldin, Nicola A.
name: Rønnow, Henrik M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We address the degeneracy of the ground state multiplet on the 5$d^1$ Re$^{6+}$ ion in double perovskite Ba$_{2}$MgReO$_{6}$ using a combination of specific heat measurements and density functional calculations. For Ba$_{2}$MgReO$_{6}$, two different ground state multiplets have previously been proposed - a quartet (with degeneracy $N$=4) [1] and a doublet ($N$=2) [2]. Here we employ two independent methods for the estimation of phonon contribution in heat capacity data to obtain the magnetic entropy $S_{mag}$, which reflects the degeneracy of the ground state multiplet $N$ through $S_{mag}=R$ln$N$. In both cases, we obtain a better fit to $S_{mag}=R$ln2 indicating evidence of $N$=2 degeneracy in the range from 2 to 120~K. The detailed nature of the ground state multiplet in Ba$_{2}$MgReO$_{6}$ remains an open question.
description: 5 pages, 4 figures
СОВРЕМЕННЫЕ МЕТОДИ ИССЛЕДОВАНИЕ ПРОЦЕССА  СУШКИ  ВИНОГРАДА  И КОМПЬЮТЕРНЫЕ  МОДЕЛИ
Creators: name: Юсупов Мухторжон Доцент Ташкентского финансового института Андижанского факультета, доктор философии по технических наук  (PhD).
Publisher: name: Zenodo
Year: 2023

description: В этой статье мы излагаем мысли и мнения о технологии сушки винограда и процессе ее математического моделирования. Известно, что обеспечение населения фруктами и овощами в экологически чистом виде является одной из актуальных проблем современности. Одним из ее решений является поставка продукта в сушеном виде. Для него мы представили структурную структуру фруктов и овощей и процессы, происходящие в них, с помощью математических и компьютерных моделей.
Ключевые слова:
 алгоритм, моделирование, сушка винограда, влага, ИК-сушка, влага, температура, распределение влаги.
 
 
MODERN METHODS FOR STUDYING DRY VINEGRAD PROCESSES AND COMPUTER MODELS
Yusupov Muxtorjon
Docent of the Tashkent financial institute of Andijan faculty,doctor of philosophy and technical sciences (PhD).E-mail: 
Yusupov66@mail.ru
 
         
Abstract.
 In this article, we present thoughts and opinions on the technology of grape drying and the process of its mathematical modeling. It is known that ensuring the population's access to ecologically clean fruits and vegetables is one of the pressing issues of modernity. One of the solutions to this problem is supplying the product in a dried form. For this purpose, we have introduced a structural framework for fruits and vegetables and the processes occurring within them using mathematical and computer models.
Keywords:
 algorithm, modeling, grape drying, moisture, IK-drying, moisture, temperature, moisture distribution.
High-energy properties of the graviton scattering in quadratic gravity
Creators: name: Abe, Yugo
name: Inami, Takeo
name: Izumi, Keisuke
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We obtain the matter-graviton scattering amplitude in the gravitational theory of quadratic curvature, which has $R_{μν}^2$ term in the action. Unitarity bound is not satisfied because of the existence of negative norm states, while an analog of unitarity bound for $S$-matrix unitarity holds due to the cancelation among the positive norm states and negative norm ones in the unitarity summation in the optical theorem. The violation of unitarity bound is a counter example of Llewellyn Smith's conjecture on the relation between tree-level unitarity and renormalizability. We have recently proposed a new conjecture that an analog of the unitarity bound for $S$-matrix unitarity gives the equivalent conditions to those for renormalizability. We show that the gravitational theory of quadratic curvature is a nontrivial example consistent with our conjecture.
description: 61pages, 3 figures
Homogenization for Deterministic Maps and Multiplicative Noise
Creators: name: Gottwald, Georg A.
name: Melbourne, Ian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: A recent paper of Melbourne & Stuart, A note on diffusion limits of chaotic skew product flows, Nonlinearity 24 (2011) 1361-1367, gives a rigorous proof of convergence of a fast-slow deterministic system to a stochastic differential equation with additive noise. In contrast to other approaches, the assumptions on the fast flow are very mild. In this paper, we extend this result from continuous time to discrete time. Moreover we show how to deal with one-dimensional multiplicative noise. This raises the issue of how to interpret certain stochastic integrals; it is proved that the integrals are of Stratonovich type for continuous time and neither Stratonovich nor Ito for discrete time. We also provide a rigorous derivation of superdiffusive limit where the stochastic differential equation is driven by a stable Levy process. In the case of one-dimensional multiplicative noise, the stochastic integrals are of Marcus type both in the discrete and continuous time contexts.
description: The updated version contains a minor correction in the appendix, and removes an unnecessary large deviation assumption
title: Ανάπτυξη μεθοδολογίας επεξεργασίας θαλάσσιων δεδομένων σεισμικής ανάκλασης διπλού αισθητήρα για την απομάκρυνση των ανακλάσεων που προέρχονται από την επιφάνεια της θάλασσας. Εφαρμογή σε συνθετικά δεδομένα από το Νότιο Αιγαίο
Creators: name: Κακαρογλου Ευαγγελος
Publisher: name: Technical University of Crete
Year: 2016

description: Αντικείμενο της διπλωματικής αυτής εργασίας είναι η ανάπτυξη μεθόδου επεξεργασίας θαλασσιών σεισμικών δεδομένων, με σκοπό την απομάκρυνση των ανακλάσεων που προέρχονται από την θαλασσιά επιφάνεια (φαινόμενο ghost). Το φαινόμενο αυτό παρουσιάζεται στις θαλάσσιες διασκοπήσεις επειδή η επιφάνεια της θάλασσας φέρεται σαν ένας τέλειος ακουστικός καθρέπτης και δημιουργεί επιφανειακές ανακλάσεις.
Το αποτέλεσμα του φαινομένου αυτού είναι να εμφανίζονται ετεροχρονισμένες, ως προς τις ανακλάσεις που προέρχονται από τους σχηματισμούς, καταγραφές, αυξάνοντας την χρονική διάρκεια των ανακλάσεων και υποβαθμίζοντας την χρονική ανάλυση των δεδομένων.
Για την επίτευξη του στόχου της εργασίας, αναπτύχθηκε ειδική μεθοδολογία στο λογισμικό Matlab™. Η μεθοδολογία αυτή, βασίστηκε στην τεχνολογία, διπλού αισθητήρα, της εταιρίας θαλάσσιων γεωφυσικών ερευνών, PGS. Η τεχνολογία αυτή κάνει χρήση 2 συνιστωσών καταγραφής των υδροφώνων, της πίεσης (P) και της κατακόρυφης ταχύτητας μετατόπισης (Vz) με σκοπό την απαλοιφή των επιφανειακών ανακλάσεων από τις καταγραφές.
Αναλυτικότερα τα βασικά στάδια υλοποίησης της παρούσας μελέτης συνοψίζονται στα εξής:
Αρχικά πραγματοποιήθηκε δημιουργία συνθετικών σεισμικών δεδομένων, με βάση πραγματικά δεδομένα από ένα τμήμα σεισμικής τομής της σεισμικής γραμμής AEG-1 μήκους περίπου 25km. Η γραμμή αυτή βρίσκεται πλησίον των νήσων Φολέγανδρος και Σίφνος, εντός της λεκάνης της Φολεγάνδρου.
Στην συνέχεια αναπτύχθηκε μέθοδος επεξεργασίας σε περιβάλλον Matlab™ για την απομάκρυνση των ανακλάσεων από την θαλάσσια επιφάνεια και εφαρμόσθηκε στα συνθετικά δεδομένα. Ακολούθησε συμβατική επεξεργασία των δεδομένων όπου πραγματοποιήθηκε αναδιάταξη των καταγραφών κοινής πηγής σε δεδομένα κοινού ενδιάμεσου σημείου, διόρθωση της κανονικής χρονικής απόκλισης και σεισμική χωροθέτηση.
Τα αποτελέσματα από την εφαρμογή της μεθόδου για την απομάκρυνση επιφανειακών ανακλάσεων, αξιολογήθηκαν και έγινε σύγκριση τους με αντίστοιχα από συνθετικό μοντέλο. Το μοντέλο αυτό δημιουργήθηκε με την χρήση ορίων απορρόφησης στην ανώτερη επιφάνεια του με αποτέλεσμα να μην παράγει επιφανειακές ανακλάσεις (φαινόμενο ghost).
Συμπερασματικά, με τη μέθοδο αυτή, προκύπτουν υψηλής ευκρίνειας συνθετικά δεδομένα, απαλλαγμένα ως επί το πλείστων από επιφανειακές ανακλάσεις (φαινόμενο ghost). Τα συνθετικά αυτά δεδομένα μπορούν να χρησιμοποιηθούν σαν βάση για την καλύτερη ερμηνεία και κατανόηση των πραγματικών δεδομένων που λαμβάνονται από την περιοχή μελέτης.
Out of Sight: Archiving Hidden Histories of Practice
Creators: name: Mukherjee, Debashree
Publisher: name: Columbia University
Year: 2013
Subjects: Motion pictures
Motion picture industry
Motion picture industry--Employees
Motion pictures--Study and teaching

description: Our understanding of Indian cinema would remain incomplete until we acknowledged its supporting cast of hairdressers, poster painters, costume designers, still photographers, makeup artists, and numerous other specialists invisible to the public eye. In January 2013, Debashree Mukherjee curated an exhibition of Hindi film memorabilia titled “Maya Mahal”, which featured artefacts from the private collection of Priya Paul. In this essay, Mukherjee uses examples from the collection to point to hidden histories of work and practice, and to give us a fragmented view of low-budget films, lost genres and the wage-workers who mark each film with their individual skills.
SO(3)-invariance of informed-graph-based deep neural network for anisotropic elastoplastic materials
Creators: name: Heider, Yousef
name: Wang, Kun
name: Sun, WaiChing
Publisher: name: Columbia University
Year: 2020
Subjects: Materials science
Crystals--Plastic properties
Neural networks (Computer science)
Lie algebras
Supervised learning (Machine learning)

description: This paper examines the frame-invariance (and the lack thereof) exhibited in simulated anisotropic elasto-plastic responses generated from supervised machine learning of classical multi-layer and informed-graph-based neural networks, and proposes different remedies to fix this drawback. The inherent hierarchical relations among physical quantities and state variables in an elasto-plasticity model are first represented as informed, directed graphs, where three variations of the graph are tested. While feed-forward neural networks are used to train path-independent constitutive relations (e.g., elasticity), recurrent neural networks are used to replicate responses that depends on the deformation history, i.e. or path dependent. In dealing with the objectivity deficiency, we use the spectral form to represent tensors and, subsequently, three metrics, the Euclidean distance between the Euler Angles, the distance from the identity matrix, and geodesic on the unit sphere in Lie algebra, can be employed to constitute objective functions for the supervised machine learning. In this, the aim is to minimize the measured distance between the true and the predicted 3D rotation entities. Following this, we conduct numerical experiments on how these metrics, which are theoretically equivalent, may lead to differences in the efficiency of the supervised machine learning as well as the accuracy and robustness of the resultant models. Neural network models trained with tensors represented in component form for a given Cartesian coordinate system are used as a benchmark. Our numerical tests show that, even given the same amount of information and data, the quality of the anisotropic elasto-plasticity model is highly sensitive to the way tensors are represented and measured. The results reveal that using a loss function based on geodesic on the unit sphere in Lie algebra together with an informed, directed graph yield significantly more accurate rotation prediction than the other tested approaches.
Dynamics in the ordered and disordered phases of barocaloric adamantane
Creators: name: Meijer, Bernet E.
name: Dixey, Richard J. C.
name: Demmel, Franz
name: Perry, Robin
name: Walker, Helen C.
name: Phillips, Anthony E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: High-entropy order-disorder phase transitions can be used for efficient and eco-friendly barocaloric solid-state cooling. Here the barocaloric effect is reported in an archetypal plastic crystal, adamantane. Adamantane has a colossal isothermally reversible entropy change of 106 J K-1 kg-1 . Extremely low hysteresis means that this can be accessed at pressure differences less than 200 bar. Configurational entropy can only account for about 40% of the total entropy change; the remainder is due to vibrational effects. Using neutron spectroscopy and supercell lattice dynamics calculations, it is found that this vibrational entropy change is mainly caused by softening in the high-entropy phase of acoustic modes that correspond to molecular rotations. We attribute this behaviour to the contrast between an 'interlocked' state in the low-entropy phase and sphere-like behaviour in the high-entropy phase. Although adamantane is a simple van der Waals solid with near-spherical molecules, this approach can be leveraged for the design of more complex barocaloric molecular crystals. Moreover, this study shows that supercell lattice dynamics calculations can accurately map the effect of orientational disorder on the phonon spectrum, paving the way for studying the vibrational entropy, thermal conductivity, and other thermodynamic effects in more complex materials.
description: 14 pages, 6 figures
Studying the properties of compressible MHD turbulence by synchrotron fluctuation statistics
Creators: name: Wang, Ru-Yue
name: Zhang, Jian-Fu
name: Lazarian, Alex
name: Xiao, Hua-Ping
name: Xiang, Fu-Yuan
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We study the observable properties of compressible MHD turbulence covering different turbulence regimes, based on synthetic synchrotron observations arising from 3D MHD numerical simulations. Using the synchrotron emissivity and intensity, we first explore how the cosmic ray spectral indices affect the measurements of turbulence properties by employing normalized correlation functions. We then study how the anisotropy of synchrotron total and polarization intensities arising from three fundamental MHD modes vary with the viewing angle, i.e., the angle between the mean magnetic field and the line of sight. We employ the ratio of quadrupole moment to the monopole one (QM) for this purpose. Our numerical results demonstrate that: (1) the two-point correlation function of synchrotron statistics for the arbitrary cosmic ray spectral index is related to the special case of magnetic field index $γ=2$ in agreement with the analytical formulae provided by Lazarian \& Pogosyan (2012); (2) the anisotropy of synchrotron total and polarization intensities arising from Alfvén and slow modes increases with the increase of the viewing angle, while that of fast mode remains almost unchanged with the viewing angle; (3) the analytical formulae of synchrotron intensities for studying turbulence can be applied to describing statistics of polarization intensities, and the QM can be successfully used to recover turbulence anisotropy. This study validates Lazarian \& Pogosyan's analytical approach and opens a way to study turbulence from observations.
description: Accepted by ApJ. 15 pages, 9 figures and 1 Table
Testing the galaxy collision induced formation scenario for the trail of dark matter deficient galaxies with the susceptibility of globular clusters to the tidal force
Creators: name: Ogiya, Go
name: Bosch, Frank C. van den
name: Burkert, Andreas
name: Kang, Xi
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: It has been suggested that a trail of diffuse galaxies, including two dark matter deficient galaxies (DMDGs), in the vicinity of NGC1052 formed because of a high-speed collision between two gas-rich dwarf galaxies, one bound to NGC1052 and the other one on an unbound orbit. The collision compresses the gas reservoirs of the colliding galaxies, which in turn triggers a burst of star formation. In contrast, the dark matter and pre-existing stars in the progenitor galaxies pass through it. Since the high pressures in the compressed gas are conducive to the formation of massive globular clusters (GCs), this scenario can explain the formation of DMDGs with large populations of massive GCs, consistent with the observations of NGC1052-DF2 (DF2) and NGC1052-DF4. A potential difficulty with this `mini bullet cluster' scenario is that the observed spatial distributions of GCs in DMDGs are extended. GCs experience dynamical friction causing their orbits to decay with time. Consequently, their distribution at formation should have been even more extended than that observed at present. Using a semi-analytic model, we show that the observed positions and velocities of the GCs in DF2 imply that they must have formed at a radial distance of 5-10kpc from the center of DF2. However, as we demonstrate, the scenario is difficult to reconcile with the fact that the strong tidal forces from NGC1052 strip the extendedly distributed GCs from DF2, requiring 33-59 massive GCs to form at the collision to explain observations.
description: 9 pages, 3 figures, accepted for publication in ApJL
Morphologies and Central Stars of Planetary Nebulae in the Galactic bulge from VLT, $\textit{HST}$ and Pan-STARRS imaging
Creators: name: Tan, Shuyu
name: Parker, Quentin A.
name: Zijlstra, Albert
name: Ritter, Andreas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This is the first in a series of papers that present sets of different results for 136 compact, known planetary nebulae within a 10 $\times$ 10 degree region of the Galactic bulge. We use a large, previously unpublished sample of our own extensive ESO 8 m VLT deep imaging and spectroscopic data. This is combined with archival deep $\textit{HST}$ imaging where available to provide a detailed morphological classification and study. The influence of angular resolution and sensitivity when assigning a morphology is discussed. A large fraction (68%) of the sample are shown to be bipolars and the implications for this in the context of planetary nebulae progenitors are explored. Four new planetary nebula central stars are also identified which are not in $\textit{Gaia}$. This is based on both VLT and deep archival Pan-STARRS broad-band imagery. Some 11 putative central stars previously reported, based on $\textit{Gaia}$ positions, are also not the true central star. In other cases the $\textit{Gaia}$ central stars reported in the literature are actually based on the overall centroid position of a very compact planetary nebula rather than the actual central star within it. $\textit{Gaia}$ parallax distances and kinematic ages for PNe in this sample are provided where possible based on fresh angular size measures from the new VLT imagery and $\textit{Gaia}$ distances and literature expansion velocities when available. All these results are discussed within the context of the overall characteristics of the Galactic bulge and its planetary nebula population.
title: Πετροφυσικά χαρακτηριστικά ψαμμιτών του Νεογενούς (Περιοχή Φανερωμένης, Μεσσαρά, Κρήτη)
Creators: name: Μαντζιωκας Ηρακλης
Publisher: name: Technical University of Crete
Year: 2016

description: Σε μια εκτεταμένη περιοχή στην κεντρική Κρήτη, εντός της λεκάνης της Μεσσαράς, έχουν παρατηρηθεί σε υδρογεωτρήσεις διαφυγές μεθανίου διαγενετικής προέλευσης. Γεωτρητικά δεδομένα υπέδειξαν ότι το μεθάνιο βρίσκεται πέραν των ιλυολίθων εντός ψαμμιτικών στρωμάτων που φιλοξενούν νερό υψηλής αλατότητας. Ψαμμίτες έχουν δημιουργηθεί στην ευρύτερη αποθετική λεκάνη της Μεσσαράς διαχρονικά από το Μέσο Μειόκαινο έως το Πλειόκαινο σε διαφορετικά αποθετικά περιβάλλοντα. Ως επακόλουθο τα κύρια πετροφυσικά τους χαρακτηριστικά το πορώδες και η διαπερατότητα εξαρτώνται άμεσα από τις αρχικές αυτές ιζηματολογικές συνθήκες και την συνεπακόλουθη διεργασία της διαγένεσης.
Στόχος της εργασίας αυτής είναι η μέτρηση τους πορώδους και της διαπερατότητας, για πρώτη φορά σε ψαμμίτες του Νεογενούς στην Κρήτη, σε 38 δείγματα που πάρθηκαν από την γεωλογική τομή μήκους περίπου τριών χιλιομέτρων που βρίσκεται δυτικά του φράγματος της Φανερωμένης. Κατά μήκος αυτής της τομής παρατηρούνται ψαμμιτικοί πάγκοι σε εναλλαγές με κροκαλοπαγή και μάργες. Στα παλιότερα σε ηλικία τμήματα της τομής (Μέσο – Ανώτερο Μειόκαινο) επικρατούν οι μη ανθρακικής σύστασης ψαμμίτες ενώ στα ανώτερα τμήματα (Πλειόκαινο) ψαμμίτες ανθρακικής σύστασης.  Αν και οι διαφορές στο πορώδες  των δύο αυτών λιθολογικών ψαμμιτικών ομάδων είναι εμφανείς, δεν συμβαίνει το ίδιο με την διαπερατότητα, συνέπεια του σχετικά υψηλού ποσοστού αργιλικού και ιλυολιθικού κλάσματος εντός των ψαμμιτών, που διαγενετικά την καθόρισε.
Observation of Giant Orbital Magnetic Moments and Paramagnetic Shift in Artificial Relativistic Atoms and Molecules
Creators: name: Ge, Zhehao
name: Slizovskiy, Sergey
name: Polizogopoulos, Peter
name: Joshi, Toyanath
name: Taniguchi, Takashi
name: Watanabe, Kenji
name: Lederman, David
name: Fal'ko, Vladimir I.
name: Velasco, Jairo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Massless Dirac fermions have been observed in various materials such as graphene and topological insulators in recent years, thus offering a solid-state platform to study relativistic quantum phenomena. Single quantum dots (QDs) and coupled QDs formed with massless Dirac fermions can be viewed as artificial relativistic atoms and molecules, respectively. Such structures offer a unique platform to study atomic and molecular physics in the ultra-relativistic regime. Here, we use a scanning tunneling microscope to create and probe single and coupled electrostatically defined graphene QDs to unravel the unique magnetic field responses of artificial relativistic nanostructures. Giant orbital Zeeman splitting and orbital magnetic moment are observed in single graphene QDs. While for coupled graphene QDs, Aharonov Bohm oscillations and strong Van Vleck paramagnetic shift are observed. Such properties of artificial relativistic atoms and molecules can be leveraged for novel magnetic field sensing modalities.