cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
NMAGIC: Fast Parallel Implementation of a Chi-Squared-Made-to-Measure Algorithm for Modelling Observational Data
Creators: name: de Lorenzi, Flavio
name: Debattista, Victor
name: Gerhard, Ortwin
name: Sambhus, Niranjan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe a made-to-measure algorithm for constructing N-particle models of stellar systems from observational data (Chi-Squared-M2M), extending earlier ideas by Syer and Tremaine. The algorithm properly accounts for observational errors, is flexible, and can be applied to various systems and geometries. We implement this algorithm in a parallel code NMAGIC and carry out a sequence of tests to illustrate its power and performance: (i) We reconstruct an isotropic Hernquist model from density moments and projected kinematics and recover the correct differential energy distribution and intrinsic kinematics. (ii) We build a self-consistent oblate three-integral maximum rotator model and compare how the distribution function is recovered from integral field and slit kinematic data. (iii) We create a non-rotating and a figure rotating triaxial stellar particle model, reproduce the projected kinematics of the figure rotating system by a non-rotating system of the same intrinsic shape, and illustrate the signature of pattern rotation in this model. From these tests we comment on the dependence of the results from Chi-Squared-M2M on the initial model, the geometry, and the amount of available data.
description: 20 pages, 23 figures, accepted for MNRAS
Competing correlated states and abundant orbital magnetism in twisted monolayer-bilayer graphene
Creators: name: He, Minhao
name: Zhang, Ya-Hui
name: Li, Yuhao
name: Fei, Zaiyao
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Xu, Xiaodong
name: Yankowitz, Matthew
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Flat band moiré superlattices have recently emerged as unique platforms for investigating the interplay between strong electronic correlations, nontrivial band topology, and multiple isospin 'flavor' symmetries. Twisted monolayer-bilayer graphene (tMBG) is an especially rich system owing to its low crystal symmetry and the tunability of its bandwidth and topology with an external electric field. Here, we find that orbital magnetism is abundant within the correlated phase diagram of tMBG, giving rise to the anomalous Hall effect (AHE) in correlated metallic states nearby most odd integer fillings of the flat conduction band, as well as correlated Chern insulator states stabilized in an external magnetic field. The behavior of the states at zero field appears to be inconsistent with simple spin and valley polarization for the specific range of twist angles we investigate, and instead may plausibly result from an intervalley coherent (IVC) state with an order parameter that breaks time reversal symmetry. The application of a magnetic field further tunes the competition between correlated states, in some cases driving first-order topological phase transitions. Our results underscore the rich interplay between closely competing correlated ground states in tMBG, with possible implications for probing exotic IVC ordering.
description: 22 Pages, 13 Figures
On the Mass of a Universe with a Quantum String-Like Beginning
Creators: name: Meyer, A. J.
name: II
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Physics (physics.gen-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: In this paper the mass of a universe, which began as a gravitationally closed, maximally spinning, Planck density quantum string is derived. A universe beginning in such an initial state has been called a Super Spin Model universe. The total mass, M, of the Super Spin Model universe is shown to be a function of only four fundamental parameters \hbar, c, G, e, such that: M = π2(\hbar c/G)1/2exp(\hbar c/e2). The present paper primarily consists of a brief derivation of the above equation and a short synopsis of the Super Spin Model. Keywords: Planck, primaton, geon, Kerr, string, cosmology, super spin model, unification, gravitation, rotating universe, non-stationary, axi-symmetric, space-time, event horizon.
description: Presented at the 32nd Coral Gables Conference, on The Launching of the Belle Epoque in High Energy Physics and Cosmology, Ft. Lauderdale, Fl., December 21, 2003, 10 Pages, 3 Figures
Multiwavelength Evidence for Two New Candidate Transitional Millisecond Pulsars in the Sub-luminous Disk State: 4FGL J0639.1--8009 and 4FGL J1824.2+1231
Creators: name: Kyer, Rebecca
name: Roy, Subhroja
name: Strader, Jay
name: Urquhart, Ryan
name: Molina, Isabella
name: Craig, Peter
name: Chomiuk, Laura
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the discovery of two new Galactic accreting compact objects consistent with the respective positions of the unassociated Fermi-LAT gamma-ray sources 4FGL J0639.1--8009 and 4FGL J1824.2+1231. A combination of new and archival X-ray data from Chandra, XMM-Newton, Swift/XRT, and eROSITA reveals a variable X-ray source in each gamma-ray error ellipse. Both candidate counterparts show power-law spectra with photon indices $Γ\sim 1.7-1.9$. Optical follow-up photometry and spectroscopy show rapid high-amplitude variability unrelated to orbital motion and persistent accretion disk spectra for both objects. We demonstrate that the properties of these X-ray/optical sources are at odds with the known phenomenology of accreting white dwarfs, but are consistent with the observed properties of the sub-luminous disk state of transitional millisecond pulsars. This brings the census of confirmed or candidate transitional millisecond pulsars in the Galactic field to nine. We show this potentially represents $\lesssim 10\%$ of the total population of transitional millisecond pulsars within 8 kpc.
description: Accepted to ApJ
Εφηβικές πρακτικές διαδικτυακού γραμματισμού στην Ελλάδα:
Creators: name: Κυρμελίδου, Παρθενόπη Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: εξωσχολικές πρακτικές γραμματισμού
διαδίκτυο
έφηβοι/ες
out-of-school literacy practices
internet
teenagers

description: Αρκετές έρευνες με θέμα τις ΤΠΕ και το γραμματισμό έχουν εστιάσει τα τελευταία χρόνια στις εξωσχολικές πρακτικές ψηφιακού γραμματισμού, στις οποίες εμπλέκονται παιδιά και ενήλικες. Η παρούσα εργασία είχε ως αντικείμενο αφενός την παρουσίαση των ιστοσελίδων που προτιμούν να επισκέπτονται οι έφηβοι/ες στην Ελλάδα και αφετέρου την ανάδειξη των μεταβλητών που διαμορφώνουν τις επιλογές που κάνουν αυτοί/ές κατά την πλοήγησή τους στο διαδίκτυο. Αρχικά παρουσιάσαμε τις θεωρητικές αναζητήσεις γύρω από το θέμα των πρακτικών γραμματισμού και ειδικότερα των εξωσχολικών πρακτικών ψηφιακού γραμματισμού. Eπεξεργαστήκαμε το ερώτημα σχετικά με τις αγαπημένες ιστοσελίδες των εφήβων, ελληνόγλωσσες και ξενόγ-λωσσες, από ερωτηματολόγιο το οποίο διανεμήθηκε σε σχολεία της ελληνικής επικ-ράτειας κατά τα έτη 2004-2005 στο πλαίσιο της έρευνας του ΚΕΓ (Κέντρο Ελληνικής Γλώσσας) «Ψηφιακές Πρακτικές Γραμματισμού των εφήβων στην Ελλάδα». Διαπισ-τώθηκε πως ιδιαίτερα το φύλο και το κοινωνικο-οικονομικό προφίλ της οικογένειας των μαθητών/τριών σχετίζονται με τις επιλογές τους κατά τη χρήση του διαδικτύου συμβάλλοντας έτσι στη διαιώνιση του ψηφιακού χάσματος.
description: During the last few years several researches concerning ICT and literacy have focused on the out-of-school digital literacy practices, in which children and adults are in-volved. The present study is on the one hand related to the presentation of the web-pages, which teenagers in Greece prefer to visit and on the other hand to the variables that affect the choices they make during web surfing. Initially, we presented the theo-retical approaches on literacy practices and out-of-school digital literacy practices in specific. The presentation section of the study was based on the question concerning the teenagers’ favourite webpages, written both in Greek and other languages, coming from a questionaire distributed to Greek schools in 2004-2005, as part of the CGL’s (Centre for Greek Language) research “Digital Literacy Pracices of teenagers in Greece”. The study concluded that the students’ choices during internet use are espe-cially influenced by their gender and the socio-economic profile of their families, con-tributing in this way to the perpetuation of the “digital divide”.
Η επίδραση ενός προγράμματος μυικής ενδυνάμωσης και διατροφικής παρέμβασης στην μείωση του σωματικού βάρους και στην αλλαγή της σύνθεσης του σώματος σε παχύσαρκα άτομα με σύνδρομο Down:
Creators: name: Ζιάρα, Παναγιώτα Χαράλαμπου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: σύνδρομο Down
παχυσαρκία
βάρος σώματος
Down syndrome
obesity
body weight

description: Ο σκοπός της παρουσας έρευνας ήταν να μελετήσει την επίδραση διαφορετικων προγραμμάτων παρέμβασης στην απώλεια σωματικού βάρους και στην αλλαγή σωματικής σύστασης σε νεαρά και ενήλικα παχύσαρκα άτομα με σύνδρομο Down. Τριάντα δυο υπέρβαροι και παχύσαρκοι έφηβοι και νέοι μη ιδρυματικοί χρονικής ηλικίας 15-32 ετών χωρίστηκαν με βάση την επιθυμία τους σε δύο πειραματικές ομάδες και μία ομάδα ελέγχου. Η διάρκεια του προγράμματος παρέμβασης ήταν 16 εβδομάδες. Η πρώτη ομάδα ακολούθησε μόνο πρόγραμμα διατροφής με σκοπό την απώλεια βάρους. Η δεύτερη ομάδα ακολούθησε πρόγραμμα διατροφής με σκοπό την απώλεια βάρους και άσκηση μυικής ενδυνάμωσης (45 λεπτών και συχνότητας τρεις φορές την εβδομάδα). Η τρίτη ομάδα επιδόθηκε σε άλλη δραστηριότητα, που δεν σχετίζεται με άσκηση και διατροφή (για παράδειγμα διάβασμα, πάζλ, χειροτεχνίες). Για την ομάδα διατροφικής παρέμβασης, οι αναλύσεις έδειξαν ότι υπήρχαν στατιστικά σημαντικές διαφορές των μέσων όρων μεταξύ αρχικής και τελικής μέτρησης σε όλες τις μετρούμενες παραμέτρους εκτός της λιπώδους σωματικής μάζας ενώ στην ομάδα άσκησης και διατροφικής παρέμβασης διαπιστώθηκαν στατιστικά σημαντικές διαφορές μεταξύ αρχικής και τελικής μέτρησης σε όλες τις μετρούμενες παραμέτρους εκτός της άλιπης σωματικής μάζας. Η ομάδα ελέγχου παρουσίασε στατιστικά σημαντικές διαφορές μόνο στο σωματικό λίπος. Συμπερασματικά, ο συνδυασμός άσκησης και διατροφικής παρέμβασης παρουσίασε τις σημαντικότερες επιδράσεις στις μετρούμενες παραμέτρους και επομένως μπορεί να πρόταθεί ως ένα πρόγραμμα αντιμετώπισης της παχυσαρκίας σε άτομα με σύνδρομο Down.
description: The purpose of this study was to to evaluate and compare the effects of two different programmes targeting weight loss in adults with Down Syndrome (DS). Thirty two overweight and obese non institutional adults with DS aged 15- 32 were assigned into three groups according to their own preference. The programme lasted 16 weeks. The first group followed a weight loss diet programme, the second group followed a combination of weight loss diet and resistance exercise 3 times per week, 45 minutes each session and the third group took part in social activities. The analysis revealed that the diet group showed significant differences in all factors except fat mass and the exercise and diet group showed significant differences in all factors except lean mass. The control group significant differences only in body weight. In conclusion we could suggest the combination of resistance exercise and weight loss diet as a way to treat obesity in people with Down Syndrome.
Slow-light enhanced absorption for bio-chemical sensing applications: potential of low-contrast lossy materials
Creators: name: Pedersen, Jesper
name: Xiao, Sanshui
name: Mortensen, Niels Asger
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Slow-light enhanced absorption in liquid-infiltrated photonic crystals has recently been proposed as a route to compensate for the reduced optical path in typical lab-on-a-chip systems for bio-chemical sensing applications. A simple perturbative expression has been applied to ideal structures composed of lossless dielectrics. In this work we study the enhancement in structures composed of lossy dielectrics such as a polymer. For this particular sensing application we find that the material loss has an unexpected limited drawback and surprisingly, it may even add to increase the bandwidth for low-index contrast systems such as polymer devices.
description: 9 pages including 3 figures
DataView: A Data Science Platform Integrating 10+ Years of nPOD-Enabled Research
Creators: name: Vu, Anh Nguyet
Publisher: name: Zenodo
Year: 2020
Subjects: FAIR
data science

description: Abstract Since 2008, investigators in nPOD have utilized the biobank to generate and publish a diverse amount of data. Toolkits are needed to connect and incorporate this information by donor across multiple experiments, laboratories, and assay types. However, there has been no comprehensive framework to aggregate, curate, and integrate these results in ways that may be used to drive new hypotheses, research questions, and collaborations. The DataView platform demonstrates an approach to how donor-connected heterogeneous data can be integrated and made available for exploration and new applications. Reference nPOD Meeting Abstracts for further description.
Ανάλυση λαθών της Ρωσικής γλώσσας βασισμένη σε σώματα κειμένων Ελλήνων μαθητών: η περίπτωση των πτώσεων
Creators: name: Ζήση, Αθηνά Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Ρωσική γλώσσα
Σώματα κειμένων
Ανάλυση λαθών
Russian language
Corpora
Error analysis

description: Με την παρούσα έρευνα επιχειρείται ο εντοπισμός, η καταγραφή και η προσπάθεια ερμηνείας συχνών λαθών που εμφανίζονται στο γραπτό λόγο των Ελλήνων που μαθαίνουν τη Ρωσική γλώσσα σε σχέση με τις πτώσεις. Η έρευνα που βασίζεται στα σώματα κειμένων (corpus-based research) και η διδακτική αλληλεπιδρούν, τα στοιχεία που προκύπτουν από τα σώματα κειμένων προτείνουν ποια γλωσσικά στοιχεία διαθέτουν μεγάλη συχνότητα στη διαγλώσσα των μαθητών και επομένως σε ποια θα πρέπει να δώσει μεγαλύτερη σημασία ο διδάσκων. Η μελέτη και η ανάλυση των λαθών μπορεί να οδηγήσει σε συμπεράσματα για τις γνωστικές και γλωσσικές διαδικασίες που επιτελούνται κατά τη μάθηση της γλώσσας.
description: Our study aims at recording, presenting and explaining some of the most frequent errors that make Greek learners of Russian as a second language. The research was based on written data from students who participated in language courses. This specific research is an attempt to find out converging and diverging elements in written speech generated from Greek students learning the Russian language. The methodology we followed is based on the theory of learner corpus-based error analysis. This study is instructed and guided by previous researches that have been contacted upon linguistic structures in written speech, but is diversified since it is referred in Russian language In order to offer reliable explanations on the occurrence of these errors, we have adopted the contrastive analysis principles as well as theories that have arisen under the influence of interlanguage. The findings that are presented are enlightening enough for the role of didactic material in comprehending some linguistic structures that are found in informal letters, furthermore, it could be broadened and generalized as well as could give results and conclusions for further applications. Applying error analysis in second language teaching can help teachers select suitable techniques that may facilitate the acquisition of Russian as a second language.
ERICC Working Paper _ Education Data Systems in Northwest Syria
Creators: name: ERICC Consortium
name: Nasser, Rabie
name: Meskhi, Michael
name: Carter, Ann
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390201
subject: Education policy

description: Syria has been engulfed in a violent conflict since 2011 which has severely damaged the country’s foundations of peace, justice and development. The Northwest of Syria (henceforth NW Syria) has witnessed brutal military operations that have led to a huge toll of people killed and injured, missing, tortured and forcibly displaced. In addition to a destruction of infrastructure, there has been degradation of social relations and environment, and distortion of public institutions.The education sector and learning process have suffered from severe damages to the drivers of learning, namely, accessibility, quality, continuity and coherence. This data systems report aims to provide in-depth insights on the current landscape of education in North West Syria, focusing on existing data systems, including information on access, quality, continuity, and identifying notable data gaps.The study is based on key informant interviews (KIIs) with key stakeholders who have knowledge of the education data systems in NW Syria. This paper presents findings on the current education data systems and explores what types and quality of data they collect. It identifies challenges affecting the data systems from three angles, namely, context, outputs and processes, in addition to suggesting policy options.Context: The conflict significantly disrupted Syria's education data systems, causing fragmentation, and capacity and infrastructure damage. Pre-conflict educational institutions in NW Syria became nonfunctional, and data collection ceased in many areas. In the absence of a coherent national system, multiple non-state actors (Syrian Interim Government (SiG) and Syria Salvation Government (SSG)), external actors (Turkish government), humanitarian organisations (UN agencies, international non-governmental organisations - INGOs), and local civil society organisations and initiatives (Assistance Coordination Unit – ACU, and non-governmental organisations - NGOs), have attempted to fill the gap.The current education data systems operate in an environment where there is lack of security and conflicting priorities among the key actors. There is a lack of coordination and integration among the data systems, and further challenges linked to the dominance of short-term humanitarian approaches, and the dependency on funding from external donors.
The periodic standing-wave approximation: eigenspectral computations for linear gravity and nonlinear toy models
Creators: name: Beetle, Christopher
name: Bromley, Benjamin
name: Price, Richard H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The periodic standing wave approach to binary inspiral assumes rigid rotation of gravitational fields and hence helically symmetric solutions. To exploit the symmetry, numerical computations must solve for ``helical scalars,'' fields that are functions only of corotating coordinates, the labels on the helical Killing trajectories. Here we present the formalism for describing linearized general relativity in terms of helical scalars and we present solutions to the mixed partial differential equations of the linearized gravity problem (and to a toy nonlinear problem) using the adapted coordinates and numerical techniques previously developed for scalar periodic standing wave computations. We argue that the formalism developed may suffice for periodic standing wave computations for post-Minkowskian computations and for full general relativity.
description: 21 pages, 10 figures, RevTeX
Chemical Liquid Phase Deposition of Thin Aluminum Oxide Films
Creators: name: Sun, Jie
name: Sun, Yingchun
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thin aluminum oxide films were deposited by a new and simple physicochemical method called chemical liquid phase deposition (CLD) on semiconductor materials. Aluminum sulfate with crystallized water and sodium bicarbonate were used as precursors for film growth, and the control of the system pH value played an important role in this experiment. The growth rate is 12 nm/h at room temperature. Post-growth annealing not only densifies and purifies the films, but results in film crystallization as well. Excellent quality of Al2O3 films in this work is supported by electron dispersion spectroscopy, Fourier transform infrared spectrum, X-ray diffraction spectrum and scanning electron microscopy photograph.
description: A novel method for Al2O3 passivation on semiconductors
Holographic representation of local bulk operators
Creators: name: Hamilton, Alex
name: Kabat, Daniel
name: Lifschytz, Gilad
name: Lowe, David A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Lorentzian AdS/CFT correspondence implies a map between local operators in supergravity and non-local operators in the CFT. By explicit computation we construct CFT operators which are dual to local bulk fields in the semiclassical limit. The computation is done for general dimension in global, Poincare and Rindler coordinates. We find that the CFT operators can be taken to have compact support in a region of the complexified boundary whose size is set by the bulk radial position. We show that at finite N the number of independent commuting operators localized within a bulk volume saturates the holographic bound.
description: 36 pages, LaTeX, 4 eps figures
GWOPS: A VO-technology Driven Tool to Search for the Electromagnetic Counterpart of Gravitational Wave Event
Creators: name: Xu, Yunfei
name: Xu, Dong
name: Cui, Chenzhou
name: Fan, Dongwei
name: Zhu, Zipei
name: Yu, Bangyao
name: Li, Changhua
name: Han, Jun
name: Mi, Linying
name: Li, Shanshan
name: He, Boliang
name: Tao, Yihan
name: Yang, Hanxi
name: Yang, Sisi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The search and follow-up observation of electromagnetic (EM) counterparts of gravitational waves (GW) is a current hot topic of GW cosmology. Due to the limitation of the accuracy of the GW observation facility at this stage, we can only get a rough sky-localization region for the GW event, and the typical area of the region is between 200 and 1500 square degrees. Since GW events occur in or near galaxies, limiting the observation target to galaxies can significantly speedup searching for EM counterparts. Therefore, how to efficiently select host galaxy candidates in such a large GW localization region, how to arrange the observation sequence, and how to efficiently identify the GW source from observational data are the problems that need to be solved. International Virtual Observatory Alliance has developed a series of technical standards for data retrieval, interoperability and visualization. Based on the application of VO technologies, we construct the GW follow-up Observation Planning System (GWOPS). It consists of three parts: a pipeline to select host candidates of GW and sort their priorities for follow-up observation, an identification module to find the transient from follow-up observation data, and a visualization module to display GW-related data. GWOPS can rapidly respond to GW events. With GWOPS, the operations such as follow-up observation planning, data storage, data visualization, and transient identification can be efficiently coordinated, which will promote the success searching rate for GWs EM counterparts.
description: 12 pages, 8 figures, published by Publications of the Astronomical Society of the Pacific
$q\to \infty$ limit of the quasitriangular WZW model
Creators: name: Klimcik, Ctirad
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Symplectic Geometry (math.SG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 17B65, 51P05, 81T50

description: We study the $q\to\infty$ limit of the $q$-deformation of the WZW model on a compact simple and simply connected target Lie group. We show that the commutation relations of the $q\to\infty$ current algebra are underlied by certain affine Poisson structure on the group of holomorphic maps from the disc into the complexification of the target group. The Lie algebroid corresponding to this affine Poisson structure can be integrated to a global symplectic groupoid which turns out to be nothing but the phase space of the $q\to\infty$ limit of the $q$-WZW model. We also show that this symplectic grupoid admits a chiral decomposition compatible with its (anomalous) Poisson-Lie symmetries. Finally, we dualize the chiral theory in a remarkable way and we evaluate the exchange relations for the $q\to\infty$ chiral WZW fields in both the original and the dual pictures.
description: final published version, 44 pages, LaTeX, substantial abbreviation, with the review-like first half of the original version suppressed
The effects of rotation on the lithium depletion of G- and K-dwarfs in Messier 35
Creators: name: Jeffries, R. D.
name: Jackson, R. J.
name: Sun, Qinghui
name: Deliyannis, Constantine P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: New fibre spectroscopy and radial velocities from the WIYN telescope are used to measure photospheric lithium in 242 high-probability, zero-age-main-sequence (ZAMS) F- to K-type members of the rich cluster M35. Combining these with published rotation periods, the connection between lithium depletion and rotation is studied in unprecedented detail. At $T_{\rm eff}<5500$ K there is a strong relationship between faster rotation and less Li depletion, although with a dispersion larger than measurement uncertainties. Components of photometrically identified binary systems follow the same relationship. A correlation is also established between faster rotation rate (or smaller Rossby number), decreased Li depletion and larger stellar radius at a given $T_{\rm eff}$. These results support models where starspots and interior magnetic fields lead to inflated radii and reduced Li depletion during the pre main sequence (PMS) phase for the fastest rotators. However, the data are also consistent with the idea that all stars suffered lower levels of Li depletion than predicted by standard PMS models, perhaps because of deficiencies in those models or because saturated levels of magnetic activity suppress Li depletion equally in PMS stars of similar $T_{\rm eff}$ regardless of rotation rate, and that slower rotators subsequently experience more mixing and post-PMS Li depletion.
description: Accepted version, for publication in MNRAS
Open-Access-Strategie des Landes Brandenburg
Creators: name: Euler, Ellen
Publisher: name: Zenodo
Year: 2019
Subjects: Open Access
Brandenburg
Offenheit
Open Data
Open Science
Open Knowledge
Offene Wissenschaft
Open-Access-Strategie
Openness

description: Entstehungsgeschichte der Open-Access-Strategie des Landes Brandenburg  Das vorliegende Papier ist das Ergebnis eines durch das MWFK Brandenburg geförderten Projektes, das seit November 2018 unter der Leitung von Prof. Dr. jur. Ellen Euler, LL.M. an der Fachhochschule Potsdam angesiedelt ist. Ziel war und ist es, alle in das wissenschaftliche Publizieren involvierten Bereiche und Akteure aus ganz Brandenburg in ein transparentes, kollaboratives und integratives Multistakeholderprojekt einzubinden und an der Erarbeitung dieser Strategie zu beteiligen. Abschließend hat sich die Brandenburgische Landesrektorenkonferenz (BLRK), in der alle brandenburgischen Hochschulen vertreten sind, im Juli 2019 mit der vorliegenden Strategie befasst. Alle Institutionen, die aktiv am Prozess teilhaben wollten, insbesondere die Hochschuleinrichtungen im Land Brandenburg und deren Infrastruktureinrichtungen, haben Vertreterinnen und Vertreter benannt, welche die Interessen und Bedürfnisse des jeweiligen Bereiches wahrnahmen und in die Strategie eingebracht haben. Durch bilaterale Gespräche, Vernetzungstreffen, Intensivworkshops und einen abschließenden Book Sprint, bei dem Expertinnen und Experten aus Wissenschaft, Forschung, Kultur und Zivilgesellschaft wertvolle Ideen und Empfehlungen zur Formulierung einer gemeinsamen Strategie zu mehr Offenheit von Wissenschaft, Forschung und Kultur im Land Brandenburg ausgearbeitet haben, die teilweise in die vorliegende Strategie eingeflossen sind, ist ein festes Netzwerk entstanden, das den weiteren Prozess über die hier vorliegende Open-Access-Strategie für wissenschaftliche Publikationen hinaus begleiten wird. Open Access als Querschnittsaufgabe bedarf gemeinsamer und koordinierter Anstrengungen auf allen Ebenen. Die vorliegende Open-Access-Strategie definiert Ziele für das Land Brandenburg und die von den relevanten Akteuren (Wissenschaftlerinnen und Wissenschaftler, Hochschulen, Infrastruktureinrichtungen und Landesregierung) umzusetzenden Maßnahmen, die zur Zielerreichung beitragen sollen, ebenso wie die notwendigen Maßnahmen zur Nachverfolgung der Zielerreichung. Das Wissen aus dem Land Brandenburg soll so verstärkt sichtbar, auffindbar, zugänglich und nutzbar gemacht werden. Der Wissenschaftsstandort Brandenburg wird damit attraktiver und die Innovationsfähigkeit der Region und der wissensbasierten Unternehmen des Landes Brandenburg wird gestärkt. Stand: Juli 2019 Herausgeber: Ministerium für Wissenschaft, Forschung und Kultur des Landes Brandenburg (MWFK) Abteilung: Presse- und Öffentlichkeitsarbeit / Referat 23 Dortustraße 36 14467 Potsdam Telefon: 0331 / 866 4566 www.mwfk.brandenburg.de presse@mwfk.brandenburg.de
Green's function theory for spin-1/2 ferromagnets with an easy-plane exchange anisotropy
Creators: name: Yamamoto, Daisuke
name: Todo, Synge
name: Kurihara, Susumu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The many-body Green's function theory with the random-phase approximation is applied to the study of easy-plane spin-1/2 ferromagnets in an in-plane magnetic field. We demonstrate that the usual procedure, in which only the three Green's functions $<< S_i^μ;S_j^->>$ ($μ=+,-,z$) are used, yields unreasonable results in this case. Then the problem is discussed in more detail by considering all combinations of Green's functions. We can derive one more equation, which cannot be obtained by using only the set of the above three Green's functions, and point out that the two equations contradict each other if one demands that the identities of the spin operators are exactly satisfied. We discuss the cause of the contradiction and attempt to improve the method in a self consistent way. In our procedure, the effect of the anisotropy can be appropriately taken into account, and the results are in good agreement with the quantum Monte Carlo calculations.
description: 8 pages, 2 figures; some comments and references added
Entropy and Temperature of a Static Granular Assembly
Creators: name: Henkes, Silke
name: O'Hern, Corey S.
name: Chakraborty, Bulbul
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Granular matter is comprised of a large number of particles whose collective behavior determines macroscopic properties such as flow and mechanical strength. A comprehensive theory of the properties of granular matter, therefore, requires a statistical framework. In molecular matter, equilibrium statistical mechanics, which is founded on the principle of conservation of energy, provides this framework. Grains, however, are small but macroscopic objects whose interactions are dissipative since energy can be lost through excitations of the internal degrees of freedom. In this work, we construct a statistical framework for static, mechanically stable packings of grains, which parallels that of equilibrium statistical mechanics but with conservation of energy replaced by the conservation of a function related to the mechanical stress tensor. Our analysis demonstrates the existence of a state function that has all the attributes of entropy. In particular, maximizing this state function leads to a well-defined granular temperature for these systems. Predictions of the ensemble are verified against simulated packings of frictionless, deformable disks. Our demonstration that a statistical ensemble can be constructed through the identification of conserved quantities other than energy is a new approach that is expected to open up avenues for statistical descriptions of other non-equilibrium systems.
description: 5 pages, 4 figures
Effects of Majorana bound states on dissipation and charging in a quantum resistor-capacitor circuit
Creators: name: Lee, Minchul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigate the effects of Majorana bound states on the ac response of a quantum resistor-capacitor circuit which is composed of a topological superconducting wire whose two ends are tunnel-coupled to a lead and a spinless quantum dot, respectively. The Majorana states formed at the two ends of the wire are found to suppress completely or enhance greatly the dissipation, depending on the strength of the overlap between two Majorana modes and/or the dot level. We compare the relaxation resistance and the quantum capacitance of the system with those of non-Majorana counterparts to find that the effects of the Majorana state on the ac response are genuine and cannot be reproduced in ordinary fermonic systems.
description: 12 pages, 4 figures
Επιπτώσεις του Μεταγεννητικού Στρες στην Εκδήλωση Συμπεριφοράς Άγχους και Κατάθλιψης σε Επίμυες μετά από Νεογνική Υποξία/Ισχαιμία:
Creators: name: Μανδυλά, Μαρία – Αικατερίνη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Μητρικός αποχωρισμός,
Νεογνική υποξία/ισχαιμία
Μaternal separation
Neonatal hypoxia – ischemia

description: Η έκθεση ατόμων σε στρεσογόνες καταστάσεις κατά τη νεογνική ηλικία αυξάνει την πιθανότητα εμφάνισης κατάθλιψης και διαταραχών άγχους όταν εκτεθούν σε στρεσογόνες συνθήκες ως ενήλικες. Ένα πειραματικό μοντέλο με το οποίο διερευνώνται οι επιπτώσεις των πρώιμων αρνητικών εμπειριών αφορά τη σχέση μητέρας - νεογέννητου και περιλαμβάνει τον καθημερινό αποχωρισμό (15λεπτο ή 3ωρο) των νεογέννητων τρωκτικών από τη μητέρα τους κατά τη διάρκεια των πρώτων εβδομάδων (1-3) της ζωής. Ο σκοπός της παρούσας εργασίας ήταν να εξετάσει τις επιπτώσεις της συνθήκης του μητρικού αποχωρισμού (1η – 6η μεταγεννητική ημέρα) και της νεογνικής υποξίας/ισχαιμίας (7η μεταγεννητική ημέρα) καθώς, επίσης, τη μεταξύ τους αλληλεπίδραση στην εκδήλωση συμπεριφοράς η οποία σχετίζεται με άγχος και κατάθλιψη σε ενήλικες επίμυες. Η νεογνική υποξία/ισχαιμία αποτελεί ένα πειραματικό μοντέλο «της περιγεννητικής ασφυξίας». Σε ηλικία περίπου 3 μηνών τα πειραματόζωα εξετάστηκαν στη δοκιμασία του ανυψωμένου λαβύρινθου (elevated plus maze) και της εξαναγκασμένης κολύμβησης (forced swimming test) οι οποίες εξετάζουν την εκδήλωση συμπεριφοράς άγχους και κατάθλιψης αντίστοιχα. Σύμφωνα με τα αποτελέσματα, η συνθήκη του τρίωρου μητρικού αποχωρισμού και η νεογνική υποξία/ισχαιμία αυξάνουν την εκδήλωση συμπεριφοράς η οποία σχετίζεται με άγχος. Επίσης, η νεογνική υποξία/ισχαιμία αυξάνει την εκδήλωση καταθλιπτικόμορφης συμπεριφοράς. Τέλος, δεν βρέθηκε αλληλεπίδραση του μητρικού αποχωρισμού και της νεογνικής υποξίας/ισχαιμίας ως προς την εκδήλωση συμπεριφοράς η οποία σχετίζεται με άγχος και κατάθλιψη. Συμπερασματικά, οι πρώιμες αρνητικές εμπειρίες επιδρούν μακροπρόθεσμα στη συμπεριφορά σχετιζόμενη με άγχος και κατάθλιψη.
description: The experience of stress during neonatal period increases vulnerability to development of depression and anxiety disorders in adulthood. An established model of early stress is neonatal maternal separation in rodents (rats or mice). The model includes daily maternal separation of the pups from their mother (15min or 3h) during the first three weeks of life. The goal of this research was to examine the effects of maternal separation (from 1st – 6th postnatal day) and neonatal hypoxia – ischemia (7th postnatal day) as well as their between interaction related to emotion – relevant behaviors. Neonatal hypoxia – ischemia exemplifies «perinatal asphyxia». At the age of 3 months animals were tested in elevated plus maze and forced-swimming test which are studying behaviors of anxiety and depression. According to the results maternal separation (3h) increases anxiety. Furthermore, neonatal hypoxia – ischemia increases anxiety and depression in adult rodents. Although, postnatal stress and neonatal hypoxia – ischemia have negative effects in behavior of adult mice, no between interaction is observed.
Kinetic derivation of Aw-Rascle-Zhang-type traffic models with driver-assist vehicles
Creators: name: Dimarco, Giacomo
name: Tosin, Andrea
name: Zanella, Mattia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Numerical Analysis (math.NA)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 35Q20, 35Q70, 35Q93, 90B20

description: In this paper, we derive second order hydrodynamic traffic models from kinetic-controlled equations for driver-assist vehicles. At the vehicle level we take into account two main control strategies synthesising the action of adaptive cruise controls and cooperative adaptive cruise controls. The resulting macroscopic dynamics fulfil the anisotropy condition introduced in the celebrated Aw-Rascle-Zhang model. Unlike other models based on heuristic arguments, our approach unveils the main physical aspects behind frequently used hydrodynamic traffic models and justifies the structure of the resulting macroscopic equations incorporating driver-assist vehicles. Numerical insights show that the presence of driver-assist vehicles produces an aggregate homogenisation of the mean flow speed, which may also be steered towards a suitable desired speed in such a way that optimal flows and traffic stabilisation are reached.
description: 25 pages, 8 figures
The mixed-valent manganese [3 x 3] grid [Mn(III)4Mn(II)5(2poap-2H)6](ClO4)10.10H2O, a mesoscopic spin-1/2 cluster
Creators: name: Waldmann, O.
name: Güdel, H. U.
name: Kelly, T. L.
name: Thompson, L. K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The magnetic susceptibility, and low-temperature magnetization curve, of the [3 x 3] grid [Mn(III)4Mn(II)5(2poap-2H)6](ClO4)10.10H2O is analyzed within a spin Hamiltonian approach. The Hilbert space is huge (4,860,000 states), but the consequent use of all symmetries and a two-step fitting procedure nevertheless allows the best-fit determination of the magnetic exchange parameters in this system from complete quantum mechanical calculations. The cluster exhibits a total spin S = 1/2 ground state; the implications are discussed.
description: 28 double-spaced pages, 7 figures, 2 tables
The Bulk RS KK-gluon at the LHC
Creators: name: Lillie, Ben
name: Randall, Lisa
name: Wang, Lian-Tao
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the possibility of discovering and measuring the properties of the lightest Kaluza-Klein excitation of the gluon in a Randall-Sundrum scenario where the Standard Model matter and gauge fields propagate in the bulk. The KK-gluon decays primarily into top quarks. We discuss how to use the $t \bar{t}$ final states to discover and probe the properties of the KK-gluon. Identification of highly energetic tops is crucial for this analysis. We show that conventional identification methods relying on well separated decay products will not work for heavy resonances but suggest alternative methods for top identification for energetic tops. We find, conservatively, that resonances with masses less than 5 TeV can be discovered if the algorithm to identify high $p_T$ tops can reject the QCD background by a factor of 10. We also find that for similar or lighter masses the spin can be determined and for lighter masses the chirality of the coupling to $t\bar t$ can be measured. Since the energetic top pair final state is a generic signature for a large class of new physics as the top quark presumably couples most strongly to the electroweak symmetry breaking sector, the methods we have outlined to study the properties of the KK-gluon should also be important in other scenarios.
description: 21 pages, 13 figures
Χιούμορ: Το χιούμορ στα διηγήματα των Μάριου Χάκκα και Aziz Nesin:
Creators: name: Cete, Asli Tayfun (Τσετέ, Άσλι)
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Μάριος Χάκκας
Αζίζ Νεσίν
χιούμορ
σάτιρα
λογοκρισία
κλαυσίγελος
Marios Chakkas
Aziz Nesin
humor
satire
censorship
Ημερομηνία

description: Σκοπός της διατριβής ήταν η ανίχνευση του χιούμορ ως κλαυσίγελος στα διηγήματα των Μάριου Χάκκα και Aziz Nesin. Παρουσιάσαμε τα χαρακτηριστικά του χιούμορ και τους ορισμούς που έχουν προταθεί. Στη συνέχεια αναφερθήκαμε στη λογοκρισία, στο χιούμορ της Αρχαιότητας, του Μεσαίωνα και της Αναγέννησης. Επομένως εξετάσαμε το χιούμορ ως κλαυσίγελος στα διηγήματα των Μάριου Χάκκα και Aziz Nesin.
description: The aim of this thesis is to detect the humour as klafsigelos in Marios Chakkas' and Aziz Nesin's stories. Features of humour and the definition for humour will be presented throughout the thesis. Following this an analysis will be made of the censorship and the humour of Antiquity, the Middle Ages and the Renaissance. The humour was determined as the humour of klafsigelos in Marios Chakkas' and Aziz Nesin's stories.
Instrumental enrichment and locus of control, self-esteem, behaviour and academic performance in grade five
Creators: name: Schneider, Sari Dineen
Publisher: name: University of British Columbia
Year: 2009

description: Using a quasi-experimental design, this study examined the effect of a four and a half month program of Instrumental Enrichment (Feuerstein, 1980) on students' self-esteem, measured by Coopersmith Self-Esteem Inventory (Coopersmith, 1967/1991); perception of academic locus of control, measured by Intellectual Achievement Responsibility Scale (Crandall, Katkovsky, & Crandall, 1965); behaviour, measured by Teacher Student Behaviour Checklist (Schneider, 1994); and academic performance, measured by teacher selected written class work. The treatment group (n = 14) of grade five students from an existing pullout learning assistance class and the control group (n = 23) attended two different inner-city elementary (K-7) schools in Vancouver, B.C. In the twice weekly 45 minute lessons, (approximately 15 hours total) the Learning Assistance teacher taught Organization of Dots and Orientation in Space instruments of IE. Results indicated a statistically significant change in behaviour (F(1,34) = 6.21 p_ < .02) favouring the treatment group. A second finding linked the locus of control and behaviour raw change scores (.62, p_ < .01). The academic performance data were too dissimilar for comparison purposes. Design improvements include: longer treatment time, similar settings for treatment and control groups (ie both closed or both open-area), monitoring of bridging activities, more effective researcher control over work used for academic assessment.
Testing dark matter interactions with CMB spectral distortions
Creators: name: Ali-Haïmoud, Yacine
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Possible interactions of dark matter (DM) with Standard Model (SM) particles can be tested with spectral distortions (SDs) of the cosmic microwave background (CMB). In particular, a non-relativistic DM particle that scatters elastically with photons, electrons or nuclei imprints a negative chemical potential $μ$ to the CMB spectrum. This article revisits the first study of this effect, with an accurate treatment of heat exchange between DM and SM particles. We show that the instantaneous-decoupling approximation made in the original study systematically and significantly underestimates the amplitude of SDs. As a consequence, we derive tighter upper bounds to the DM-SM elastic-scattering cross section for DM masses $m_χ\lesssim 0.1$ MeV, from the non-detection of $μ$-distortions by FIRAS. We also show that a future instrument like PIXIE, sensitive to $|μ| \sim 10^{-8}$, would be able to probe DM-SM cross sections much smaller than first forecasted, and orders of magnitude below current upper limits from CMB-anisotropy data, up to DM masses of $\sim 1$ GeV. Lastly, we study the sensitivity of SDs to the electric and magnetic dipole moments of the DM. Although SDs can place non-trivial constraints on these models, we find that even future SD experiments are unlikely to improve upon the best current bounds. This article is accompanied by the public code DMDIST, which allows one to compute CMB SDs for generic particle-DM models, specified by their cross sections for elastic scattering with and annihilation into SM particles.
description: 13 pages + refs, 9 figures. DMDIST available at https://cosmo.nyu.edu/yacine/dmdist/dmdist.html