cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Computing the alliance polynomial of a graph
Creators: name: Carballosa, Walter
name: Rodríguez, José M.
name: Sigarreta, José M.
name: Torres-Nuñez, Yadira
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: The alliance polynomial of a graph $Γ$ with order $n$ and maximum degree $δ_1$ is the polynomial $A(Γ; x) = \sum_{k=-δ_1}^{δ_1} A_{k}(Γ) \, x^{n+k}$, where $A_{k}(Γ)$ is the number of exact defensive $k$-alliances in $Γ$. We provide an algorithm for computing the alliance polynomial. Furthermore, we obtain some properties of $A(Γ; x)$ and its coefficients. In particular, we prove that the path, cycle, complete and star graphs are characterized by their alliance polynomials. We also show that the alliance polynomial characterizes many graphs that are not distinguished by other usual polynomials of graphs.
description: Accepted for publication in Ars Combinatoria
A Fabric Soft Robotic Exoskeleton with Novel Elastic Band Integrated Actuators for Hand Rehabilitation
Creators: name: Suulker, Cem
name: Skach, Sophie
name: Althoefer, Kaspar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Common disabilities like stroke and spinal cord injuries may cause loss of motor function in hands. They can be treated with robot assisted rehabilitation techniques, like continuously opening and closing the hand with help of a robot, in a cheaper, and less time consuming manner than traditional methods. Hand exoskeletons are developed to assist rehabilitation, but their bulky nature brings with it certain challenges. As soft robots use elastomeric and fabric elements rather than heavy links, and operate with pneumatic, hydraulic or tendon based rather than traditional rotary or linear motors, soft hand exoskeletons are deemed a better option in relation to rehabilitation.
description: 2 pages, 4 figures, conference
“Kwartalnik Historii Nauki i Techniki” on a prominent Naturalist Jean E. Gilibert
Creators: name: Köhler Piotr
Publisher: name: Историко-биологические исследования
Year: 2016
Subjects: CONFERENCES
HISTORY OF BOTANY
GILIBERT JEAN EMMANUEL (1741-1814)
КОНФЕРЕНЦИИ
ИСТОРИЯ БОТАНИКИ
ЖИЛИБЕР ЖАН ЭММАНУЭЛЬ (1741-1814)

description: Frenchman Jean Emmanuel Gilibert (1741-1814) was undoubtedly the most outstanding figure among scientists naturalists working in the second half of the eighteenth century in the Polish-Lithuanian Commonwealth. His activity during the nearly eight-year stay, first in Grodno, then in Vilna, had a considerable influence on Polish botany. He published a series of works devoted to the Lithuanian plants. The most important of these publications are: Flora Lituanica inchoata (Grodno Vilnius 1781-1782), Exercitia Phytologica (Lyon 1792), Le Calendrier de flore pour l’année 1778 autour de Grodno et pour l’année 1808 autour de Lyon (Lyon 1809). J.E. Gilibert initiated by his activities the development of modern botany in Poland. In 2014, falls the 200th anniversary of his death. On this occasion, the Institute of the History of Science of the Polish Academy of Sciences organized on 25 and 26 September 2014 an international conference in Warsaw. For two days, scientists from France, Lithuania, Poland and Ukraine presented the results of his research on the life, activities, achievements and scientific legacy of J. E. Gilibert. The reviewed number of "Kwartalnik Historii Nauki i Techniki” [Quarterly History of Science and Technology] contains papers delivered during the conference.
Multi-objective low-thrust spacecraft trajectory design using reachability analysis
Creators: name: Vertovec, Nikolaus
name: Ober-Blöbaum, Sina
name: Margellos, Kostas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: One of the fundamental problems in spacecraft trajectory design is finding the optimal transfer trajectory that minimizes the propellant consumption and transfer time simultaneously. We formulate this as a multi-objective optimal control (MOC) problem that involves optimizing over the initial or final state, subject to state constraints. Drawing on recent developments in reachability analysis subject to state constraints, we show that the proposed MOC problem can be stated as an optimization problem subject to a constraint that involves the sub-level set of the viscosity solution of a quasi-variational inequality. We then generalize this approach to account for more general optimal control problems in Bolza form. We relate these problems to the Pareto front of the developed multi-objective programs. The proposed approach is demonstrated on two low-thrust orbital transfer problems around a rotating asteroid.
description: Paper published in European Journal of Control, 28 pages, 7 figures
RAGO: Recurrent Graph Optimizer For Multiple Rotation Averaging
Creators: name: Li, Heng
name: Cui, Zhaopeng
name: Liu, Shuaicheng
name: Tan, Ping
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This paper proposes a deep recurrent Rotation Averaging Graph Optimizer (RAGO) for Multiple Rotation Averaging (MRA). Conventional optimization-based methods usually fail to produce accurate results due to corrupted and noisy relative measurements. Recent learning-based approaches regard MRA as a regression problem, while these methods are sensitive to initialization due to the gauge freedom problem. To handle these problems, we propose a learnable iterative graph optimizer minimizing a gauge-invariant cost function with an edge rectification strategy to mitigate the effect of inaccurate measurements. Our graph optimizer iteratively refines the global camera rotations by minimizing each node's single rotation objective function. Besides, our approach iteratively rectifies relative rotations to make them more consistent with the current camera orientations and observed relative rotations. Furthermore, we employ a gated recurrent unit to improve the result by tracing the temporal information of the cost graph. Our framework is a real-time learning-to-optimize rotation averaging graph optimizer with a tiny size deployed for real-world applications. RAGO outperforms previous traditional and deep methods on real-world and synthetic datasets. The code is available at https://github.com/sfu-gruvi-3dv/RAGO
description: Accepted by CVPR 2022
Generating Perspectives: Applying Generative Design to critically explore the Atlas of Swiss Folklore
Creators: name: Frischknecht, Max
Publisher: name: Zenodo
Year: 2022
Subjects: Generative Design
Data Visualisation
Digital Humanitites
Cultural Anthropology
Critical Cartography

description: The poster addresses generative design as a methodology for a critical-visual exploration of the 1940s Atlas of Swiss Folklore. When we look at visualizations, we are often intrigued by the idea that they represent naturally existing phenomena through visual form. This poses a challenge to humanities scholars who interpret context-dependent data that represents complex social interweaving that unwind across time and space. The data beneath the Atlas of Swiss Folklore, for example, is the product of a perennial and multilayered process of collection and analysis. This interpretative framework is often no longer comprehensible in the finished visualizations leading to the impression of unambiguous visual statements. But rather than depicting unique meaning, visualizations should invite the viewer to critically question what is being viewed and the circumstances of its creation. The poster presents Generative Design is a promising approach that utilizes morphology and iteration to create a plurality of visualizations. Through Generative Design the Atlas of Swiss Folklore and its circumstances of creation can be examined from different perspectives. Generative Design can be used, for example, to visualize the locations of the atlas data collection in different contexts and thus help evaluate which parts of the population the maps of the atlas are representative or not.
Multiple chiral doublet bands of identical configuration in 103Rh
Creators: name: Kuti, I.
name: Chen, Q. B.
name: Timar, J.
name: Sohler, D.
name: Zhang, S. Q.
name: Zhang, Z. H.
name: Zhao, P. W.
name: Meng, J.
name: Starosta, K.
name: Koike, T.
name: Paul, E. S.
name: Fossan, D. B.
name: Vaman, C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Three sets of chiral doublet band structures have been identified in the 103Rh nucleus. The properties of the observed chiral doublet bands are in good agreement with theoretical results obtained using constrained covariant density functional theory and particle rotor model calculations. Two of them belong to an identical configuration, and provide the first experimental evidence for a novel type of multiple chiral doublets, where an "excited" chiral doublet of a configuration is seen together with the "yrast" one. This observation shows that the chiral geometry in nuclei can be robust against the increase of the intrinsic excitation energy.
The role of abrasion in the development of toe tip necrosis syndrome: a  preliminary study
Creators: Hedayati, Nassim
Bradshaw, Emily
Espinosa, Alvaro
Majcher, Kadin
Jelinski, Murray
Johnston, James
Publisher: name: University of Alberta Library
Year: 2022

Conference abstract. Part of the Proceedings of the Canadian Society for Mechanical Engineering International Congress 2022.
КЛИНИКО- АНАМНЕСТИЧЕСКИЕ ОСОБЕННОСТИ ОСТРОЙ РЕВМАТИЧЕСКОЙ ЛИХОРАДКИ У ДЕТЕЙ НА СОВРЕМЕННОМ ЭТАПЕ
Creators: name: Умарова, С.С.
name: Набиева, Ф.С.
name: Турсунов, Ф.У.
name: Гуломова, Ф.С.
name: Фозилова, Н.М.
Publisher: name: Zenodo
Year: 2023

description: Несмотря на значительные успехи в снижении заболеваемости, острая ревматическая лихорадка (ОРЛ) за последние десятилетия наблюдается во всех странах мира. Определение особенностей течения заболевания имеет важное значение для своевременной диагностики, что требует проведения тщательного анализа клинических, лабораторных и инструментальных данных.
New inequalities on the hyperbolicity constant of line graphs
Creators: name: Carballosa, Walter
name: Rodríguez, José M.
name: Sigarreta, José M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: If X is a geodesic metric space and $x_1,x_2,x_3\in X$, a {\it geodesic triangle} $T=\{x_1,x_2,x_3\}$ is the union of the three geodesics $[x_1x_2]$, $[x_2x_3]$ and $[x_3x_1]$ in $X$. The space $X$ is $δ$-\emph{hyperbolic} $($in the Gromov sense$)$ if any side of $T$ is contained in a $δ$-neighborhood of the union of the two other sides, for every geodesic triangle $T$ in $X$. We denote by $δ(X)$ the sharp hyperbolicity constant of $X$, i.e. $δ(X):=\inf\{δ\ge 0: \, X \, \text{ is $δ$-hyperbolic}\,\}\,. $ The main result of this paper is the inequality $δ(G) \le δ(\mathcal L(G))$ for the line graph $\mathcal L(G)$ of every graph $G$. We prove also the upper bound $δ(\mathcal L(G)) \le 5 δ(G)+ 3 l_{max}$, where $l_{max}$ is the supremum of the lengths of the edges of $G$. Furthermore, if every edge of $G$ has length $k$, we obtain $δ(G) \le δ(\mathcal L(G)) \le 5 δ(G)+ 5k/2$.
description: Accepted for publication in Ars Combinatoria
title: Between Memory Recall and Historical Consciousness: Implications for Education
title: Zwischen Erinnerung und Geschichtsbewusstsein: Folgerungen für den Unterricht
titleType: AlternativeTitle
title: Entre la mémoire et la conscience historique: quelques implications pour l’éducation
titleType: AlternativeTitle
Creators: name: Lévesque, Stéphane
Publisher: name: S. Lévesque, Between Memory Recall and Historical Consciousness: Implications for Education, «Public history weekly», 2, 2014, n. 33
Year: 2014

description: “Honestly, I don’t recall anything. But I think there were lots of troubles between French and English Canadians… ” says one 17 year old student when asked to recount the history of Canada. Like many of her counterparts, Annie was initially baffled by the task of writing a historical narrative of Canada because, as she put it, “I don’t recall anything”. Public surveys periodically remind Canadians of the catastrophic state of historical knowledge among youth. “Canada is failing history,” as one newspaper even put it.
description: “Ehrlich gesagt erinnere ich mich an gar nichts. Ich glaube, da gab es eine Menge Schwierigkeiten zwischen den französischen und englischen Kanadiern …” antwortete eine 17-jährige Schülerin auf die Aufforderung, die Geschichte Kanadas zu erzählen. Wie viele ihrer Altersgenossen reagierte sie zunächst verwirrt auf die Aufgabe, eine Darstellung der Geschichte Kanadas zu verfassen. Denn, so äußerte sie sich, “ich erinnere mich an gar nichts”. Erhebungen in der Öffentlichkeit, die eine Unzahl von “entscheidenden” Daten abfragen, erinnern die Kanadier regelmäßig an den katastrophalen Zustand der historischen Kenntnisse bei Jugendlichen. “Kanada versagt in Geschichte”, brachte es eine Zeitung gar auf den Punkt.
description: “Honnêtement, je ne me rappelle de rien. Mais je pense qu’il y avait beaucoup de troubles avec les Français canadien et les Anglais canadien….” Voilà la première réaction d’une élève de 17 ans à qui l’on a demandé de raconter l’histoire du Canada. Comme plusieurs de ses pairs, Annie fut d’abord surprise par la tâche de rédiger un court récit de l’aventure historique du Canada car, comme elle l’affirme, “je ne me rappelle de rien“. Plusieurs sondages d’opinion rappellent périodiquement aux Canadiens le manque inquiétant de connaissances historiques chez les jeunes. La situation est telle qu’un quotidien national a même affirmé que c’est “tout le Canada qui échoue son cours d’histoire“.
Local Hamiltonians for quantitative Green's function embedding methods
Creators: name: Rusakov, Alexander A.
name: Phillips, Jordan J.
name: Zgid, Dominika
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Embedding calculations that find approximate solutions to the Schrödinger equation for large molecules and realistic solids are performed commonly in a three step procedure involving (i) construction of a model system with effective interactions approximating the low energy physics of the initial realistic system, (ii) mapping the model system onto an impurity Hamiltonian, and (iii) solving the impurity problem. We have developed a novel procedure for parametrizing the impurity Hamiltonian that avoids the mathematically uncontrolled step of constructing the low energy model system. Instead, the impurity Hamiltonian is immediately parametrized to recover the self-energy of the realistic system in the limit of high frequencies or short time. The effective interactions parametrizing the fictitious impurity Hamiltonian are local to the embedded regions, and include all the non-local interactions present in the original realistic Hamiltonian in an implicit way. We show that this impurity Hamiltonian can lead to excellent total energies and self-energies that approximate the quantities of the initial realistic system very well. Moreover, we show that as long as the effective impurity Hamiltonian parametrization is designed to recover the self-energy of the initial realistic system for high frequencies, we can expect a good total energy and self-energy. Finally, we propose two practical ways of evaluating effective integrals for parametrizing impurity models.
description: 11 pages, 10 figures
THE EXAMINATION OF HEALTH CARE SYSTEM DISTRUST AS A BARRIER TO UTILIZATION AND ENGAGEMENT OF PREVENTIVE SERVICES IN THE HEALTH CARE SYSTEM IN BLACK EMERGING ADULTS, WITH A SPECIAL FOCUS ON INSURANCE STATUS AND USUAL SOURCE OF CARE.
Creators: name: Wynn, Alexandra
Publisher: name: VCU Libraries
Year: 2022

description: VCU Theses and Dissertations
High-angular momentum excitations in collinear antiferromagnet FePS$_3$
Creators: name: Wyzula, Jan
name: Mohelsky, Ivan
name: Vaclavkova, Diana
name: Kapuscinski, Piotr
name: Veis, Martin
name: Faugeras, Clement
name: Potemski, Marek
name: Zhitomirsky, Mike E.
name: Orlita, Milan
Publisher: name: arXiv
Year: 2022
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: We report on magneto-optical studies of the quasi-two-dimensional van der Waals antiferromagnet FePS$_3$. Our measurements reveal an excitation that closely resembles the antiferromagnetic resonance mode typical of easy-axis antiferromagnets, nevertheless, it displays an unusual, four-times larger Zeeman splitting in an applied magnetic field. We identify this excitation with an $|S_z|=4$ multipolar magnon -- a single-ion 4-magnon bound state -- that corresponds to a full reversal of a single magnetic moment of the Fe$^{2+}$ ion. We argue that condensation of multipolar magnons in large-spin materials with a strong magnetic anisotropy can produce new exotic states.
description: 7 pages, 3 figures + supplement
Interplay of spin-orbit and entropic effects in Cerium
Creators: name: Lanatà, Nicola
name: Yao, Yong-Xin
name: Wang, Cai-Zhuang
name: Ho, Kai-Ming
name: Kotliar, Gabriel
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We perform first-principle calculations of elemental cerium and compute its pressure-temperature phase diagram, finding good quantitative agreement with the experiments. Our calculations indicate that, while a signature of the volume-collapse transition appears in the free energy already at low temperatures, at larger temperatures this signature is enhanced because of the entropic effects, and originates an actual thermodynamical instability. Furthermore, we find that the catalyst determining this feature is --- in all temperature regimes --- a pressure-induced effective reduction of the $f$-level degeneracy due to the spin-orbit coupling. Our analysis suggests also that the lattice vibrations might be crucial in order to capture the behavior of the pressure-temperature transition line at large temperatures.
description: 5 pages, 3 figures
Success Story Booklet 2nd edition
Creators: name: FF4EuroHPC, Consortium
name: Open Calls, Experiment Partners
Publisher: name: Zenodo
Year: 2023

description: FF4EuroHPC helps facilitate access to High-Performance Computing-related technologies for European Small & Medium Enterprises (SMEs) and thus increases the innovation potential of European industry. Whether an SME is running high-resolution simulations, doing large-scale data analyses, or incorporating AI applications into its business or service workflows, FF4EuroHPC assists them to connect their business with cutting-edge technologies. This is the second booklet including all 42 experiment success strories.
Electrical and thermal transport properties of superconducting materials relevant for applications
Creators: name: Avitabile, Francesco
Publisher: name: Universita degli studi di Salerno
Year: 2018
Subjects: subject: FIS/01 FISICA SPERIMENTALE
subject: Superconduttività
subject: Stabilità termica ed elettrica
subject: Applicazioni

description: 2016 - 2017
description: Superconducting materials are used in several applications among which the large-scale ones take advantage of the high energy transport capabilities of superconductors due to the low losses in electrical conduction. From a practical point of view, it is necessary to achieve the highest possible current density values without dissipation, thus the critical current density Jc has to be increased. Indeed, once the biasing current density increases above the critical value, the transition of the material to the normal state, referred also as a quench event, can be observed. Often this transition is not gradual. Thus, an important feature to consider is the voltage stability under current biasing in the dissipative regime. In particular, if the Flux-Flow Instability (FFI) phenomenon is triggered, the transition in the current-voltage (I-V) results in a sudden voltage jump. Electrical and thermal stability is strictly demanding in order to avoid quench phenomena or to adopt protection strategies. In a quench phenomenon, once a normal zone has started to grow, it will continue to expand under the combined actions of heat conduction and ohmic heating at a constant velocity referred as normal zone propagation velocity (NZPV). Thus, NZPV evaluation plays a key role in the protection strategies against quench-induced damages. NZPV depends mainly on electrical and thermal properties of the various components of the technical superconductor, which is made in composite form, containing both superconducting, conducting and insulating materials. Heat transfer through the conductor is the main channel for removing heat form the superconducting medium and, consequently, preventing a quench. In this work it is reported the study of the electrical transport properties of superconducting materials relevant for applications. In particular, it has been focused on pinning properties and voltage stability of superconducting materials and on electrical and thermal characterization of technical superconductors. Electrical characterization of Fe(Se,Te) thin films grown on CaF2 substrate has been performed in order to investigate the pinning properties and the voltage stability aspects in view of tapes manufacturing. Electrical and thermal properties of Bi-2212 technical superconductors have been investigated, in order to obtain information about the key factors for the quench analysis, i.e. electrical and thermal conductances. Regardless of the superconducting material, an accurate study based on avoiding quench by means of a deep investigation of electrical and thermal transport properties becomes relevant for applications. [edited by Author]
Readiness, Willingness and Ability: Tool Protocol and Pilot FIndings
Creators: name: McDavid, Lindley
name: Parker, Loran
name: France, Alex
name: Bessenbacher, Ann
Publisher: name: Evaluation and Learning Research Center
Year: 2022

description: The RWA assessment promotes an evidence-based assessment approach to better understand inclination to institutional change and likelihood of using improved practices to instigate change effectively.
Beyond similarity: A network approach for identifying and delimiting biogeographical regions
Creators: name: Vilhena, Daril A.
name: Antonelli, Alexandre
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Biogeographical regions (geographically distinct assemblages of species and communities) constitute a cornerstone for ecology, biogeography, evolution and conservation biology. Species turnover measures are often used to quantify biodiversity patterns, but algorithms based on similarity and clustering are highly sensitive to common biases and intricacies of species distribution data. Here we apply a community detection approach from network theory that incorporates complex, higher order presence-absence patterns. We demonstrate the performance of the method by applying it to all amphibian species in the world (c. 6,100 species), all vascular plant species of the USA (c. 17,600), and a hypothetical dataset containing a zone of biotic transition. In comparison with current methods, our approach tackles the challenges posed by transition zones and succeeds in identifying a larger number of commonly recognised biogeographical regions. This method constitutes an important advance towards objective, data derived identification and delimitation of the world's biogeographical regions.
description: 5 figures and 1 supporting figure
Cauchy surfaces and diffeomorphism types of globally hyperbolic spacetimes
Creators: name: Torres, Rafael
Publisher: name: arXiv
Year: 2014
Subjects: subject: Geometric Topology (math.GT)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Chernov-Nemirovski observed that the existence of a globally hyperbolic Lorentzian metric on a (3 + 1)-spacetime pins down a smooth structure on the underlying 4-manifold. In this paper, we point out that the diffeomorphism type of a globally hyperbolic (n + 1)-spacetime is determined by the h-cobordism class of its Cauchy surface, hence extending Chernov-Nemirovski's observation to arbitrary dimensions.
description: to appear Class. Quant. Grav
OVOZ SOZLASH QOIDALARI VA AKADEMIK YOʻNALISHDAGI OVOZLARNI AN'ANAVIY USLUBGA MUTANOSIBLASHTIRISH
Creators: name: Jumayev, Suhrob
Publisher: name: Zenodo
Year: 2023

description: Ushbu maqolada avvalo bugungi kunda yurtimizda an'anaviy xonandalik sohasi rivoji haqida aytib o'tiladi. Sohaning akademik xonandalikka ham tobora singgib borayotgan jihatlari ta'riflanadi. Ba'zi terminlarga ta'rif beriladi. Soha mutaxassislarining fikrlari iqtibos tarzida keltiriladi. Ta'lim jarayoni uchun tavsiya etiladigan maxsus ovoz mashqlari beriladi.
The outburst of the changing-look AGN IRAS23226-3843 in 2019
Creators: name: Kollatschny, Wolfram
name: Grupe, Dirk
name: Parker, Michael L.
name: Ochmann, Martin W.
name: Schartel, Norbert
name: Romero-Colmenero, Encarni
name: Winkler, Hartmut
name: Komossa, Stefanie
name: Famula, Philipp
name: Probst, Malte A.
name: Santos-Lleo, Maria
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: IRAS23226-3843 has previously been classified as a changing-look AGN based on X-ray and optical spectral variations. In 2019, Swift observations revealed a strong rebrightening in X-ray and UV fluxes in comparison to observations in 2017. We took follow-up Swift, XMM-Newton, and NuSTAR observations together with optical spectra (SALT and SAAO 1.9m telescope) from 2019 until 2021. IRAS23226-3843 showed a strong X-ray and optical outburst in 2019. It varied in the X-ray and optical continuum by a factor of 5 and 1.6, respectively, within two months. This corresponds to a factor of 3 in the optical after correction for the host galaxy contribution. The Balmer and FeII emission-line intensities showed comparable variability amplitudes. The Halpha profiles changed from a blue-peaked profile in the years 1997 and 1999 to a broad double-peaked profile in 2017 and 2019. However, there were no major profile variations in the extremely broad double-peaked profiles despite the strong intensity variations in 2019. One year after the outburst, the optical spectral type changed and became a Seyfert type 2 in 2020. Blue outflow components are present in the Balmer lines and in the Fe band in the X-rays. A deep broadband XMM-Newton/NuSTAR spectrum was taken during the maximum state in 2019. This spectrum is qualitatively very similar to a spectrum taken in 2017, but by a factor of 10 higher. The soft X-ray band appears featureless. The soft excess is well modeled with a Comptonization model. A broadband fit with a power-law continuum, Comptonized soft excess, and Galactic absorption gives a good fit to the combined EPIC-pn and NuSTAR spectrum. In addition, we see a complex and broadened Fe K emission-line profile in the X-rays. The changing-look character in IRAS23226-3843 is most probably caused by changes in the accretion rate -- based on the short-term variations on timescales of weeks to months.
description: 21 pages, 14 figures, Astronomy & Astrophysics in press
Strukturierende Arbeitshilfen zum forschenden Lernen Ergänzungen zur Videoreihe „Forschen Lernen“
Creators: name: Langemeyer, Ines
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2018
Subjects: Forschendes Lernen
Wissenschaftstheorie
Wissenschaftsdidaktik

description: Was ist wichtig beim forschenden Lernen? Die Serie der Lehrvideos gibt Einblick in wissenschaftstheoretische Grundlagen, damit Studierende bei eigenen Forschungsprojekten ihren Lernprozess besser organisieren können. Dozentinnen und Dozenten können sich Anregungen holen, wie sie Studierende zum forschenden Lernen anleiten können. Zu den Videos ergänzend finden sich in dem Dokument Arbeitshilfen, damit Studierende ihren eigenen Forschungsprozess strukturieren und das eigene das Verständnis zur Beweisführung und zur Koordination von Theorie und Beweis in ihrer fachlichen Disziplin vertiefen.
title: Μελέτη της οργανωμένης επιθετικής τακτικής των ομάδων καλαθοσφαίρισης στα ευρωπαϊκά πρωταθλήματα 2003 και 2005
titleType: AlternativeTitle
Creators: name: Αριστείδης, Γιώργος
Publisher: name: University of Thessaly
Year: 2006
Subjects: subject: ΚΑΛΑΘΟΣΦΑΙΡΙΣΗ -- ΕΠΙΘΕΣΗ
subject: ΚΑΛΑΘΟΣΦΑΙΡΙΣΗ -- ΣΤΡΑΤΗΓΙΚΗ ΚΑΙ ΤΑΚΤΙΚΗ

description: Σκοπός της παρούσας έρευνας ήταν η ανάλυση της επιθετικής τακτικής και η σύγκριση των εθνικών ομάδων καλαθοσφαίρισης που συμμετείχαν στα Ευρωπαϊκά πρωταθλήματα του 2003 και 2005. Για την πραγματοποίηση της έρευνας καταγράφηκαν 48 αγώνες καλαθοσφαίρισης των εθνικών ομάδων που συμμετείχαν στο ευρωπαϊκό πρωτάθλημα στη Σουηδία το 2003 και στο ευρωπαϊκό πρωτάθλημα στη Σερβία-Μαυροβούνιο το 2005. Για την ανάλυση των αγώνων χρησιμοποιήθηκε το πρόγραμμα για Η/Υ BasketAS (Basket Analyse-System). Για την στατιστική επεξεργασία των δεδομένων, από το στατιστικό πακέτο SPAD 3.21, χρησιμοποιήθηκαν η ανάλυση αντιστοιχιών (correspodance) με προγράμματα ομαδοποίησης (classification). Επίσης, από το στατιστικό πακέτο SPSS 8.00, έγινε έλεγχος ανεξαρτησίας των τιμών με το μη παραμετρικό τεστ χ (chi-square) κατανομή. Από τα αποτελέσματα της έρευνας προέκυψε ότι: η οργανωμένη επίθεση υπήρξε η κυρίαρχη μορφή επίθεσης στην τακτική των ομάδων, χωρίς σημαντικές διαφορές μεταξύ νικητών και ηττημένων. Οι παίκτες που ανέλαβαν την εκδήλωση των περισσοτέρων επιθέσεων ήταν οι οργανωτές και οι κεντρικοί παίκτες, ενώ το περιφερειακό παιχνίδι κυριάρχησε του παιχνιδιού κοντά στο καλάθι στις οργανωμένες επιθέσεις. Κυρίαρχες μορφές συνεργασίας στη επίθεση αναδείχθηκαν το σκριν στον παίκτη με τη μπάλα, οι καταστάσεις 1 εναντίον 1, η διείσδυση και πάσα στο καλάθι, καθώς και η συνεργασία κεντρικού - περιφερειακού παίκτη. Οι νικητές χαρακτηρίστηκαν από καλύτερα ποσοστά στις βολές, περισσότερα εύστοχα σουτ δύο πόντων, περισσότερα κερδισμένα φάουλ και λιγότερα λάθη έναντι των ηττημένων. Οι κεντρικοί παίκτες πραγματοποίησαν τα περισσότερα εύστοχα δίποντα και κέρδισαν τα περισσότερα φάουλ, ενώ οι οργανωτές τα έκαναν τα περισσότερα λάθη. Τέλος, οι επιθέσεις πραγματοποιήθηκαν εναντίον προσωπικής άμυνας στο 1/4 του γηπέδου, που αποτέλεσε την κυρίαρχη μορφή άμυνας όλων των ομάδων.
title: Χρονοεξαρτώμενες μεταβολές δεικτών οξειδωτικού στρες μετά από οξεία αερόβια άσκηση
titleType: AlternativeTitle
Creators: name: Μιχαηλίδης, Ιωάννης
Publisher: name: University of Thessaly
Year: 2007
Subjects: subject: ΟΞΕΙΔΩΤΙΚΟ ΣΤΡΕΣ
subject: ΑΣΚΗΣΗ -- ΦΥΣΙΟΛΟΓΙΑ

description: Σκοπός: Ήταν να ερευνηθούν οι χρονοεξαρτώμενες μεταβολές δεικτών του οξειδωτικού στρες κάνοντας επαναλαμβανόμενες δειγματοληψίες στη διάρκεια του 24ώρου μετά από οξεία αερόβια άσκηση. Μέθοδος: Έντεκα απροπόνητοι άντρες συμμετείχαν σε δυο συνθήκες. Κατά τη συνθήκη άσκησης, οι εθελοντές έτρεξαν για 45 λεπτά σε διάδρομο στο 70-75% της μέγιστης πρόσληψης οξυγόνου (VO2 max) και στη συνέχεια αυξήθηκε η ένταση στο 90% της VO2 max μέχρι να εξαντληθούν. Κατά τη συνθήκη ελέγχου οι εθελοντές αναπαύονταν. Δείγματα αίματος λήφθηκαν πριν, αμέσως μετά, και στις 0.5, 1, 2, 3, 4, 5, 6, 8, 10 και 24 ώρες μετά την άσκηση. Δείκτες που μετρήθηκαν: Ανηγμένη γλουταθειόνη (GSH), οξειδωμένη γλουταθειόνη (GSSG), GSH/GSSG, ουσίες που αντιδρούν με θειοβαρβιτουρικό οξύ (TBARS), πρωτεϊνικά καρβονύλια (PC), δραστικότητα καταλάσης και ολική αντιοξειδωτική ικανότητα (TAC). Αποτελέσματα: Η GSH και ο λόγος μειώθηκαν για 5-h μετά την άσκηση κορυφώνοντας στις 2-h (-63% και -73%, αντίστοιχα). Η GSSG αυξήθηκε από τις 0,5-h έως τις 4-h ώρες μετά την άσκηση και κορύφωσε στις 2-h (39%). Τα TBARS αυξήθηκαν για 3-h μετά την άσκηση κορυφώνοντας στη 1-h (123%). Τα PC αυξήθηκαν από τις 0,5-h μετά την άσκηση μέχρι τις 8-h, εμφανίζοντας τη μέγιστη συγκέντρωση τους στις 4-h (96%). Η δραστικότητα της καταλάσης αυξήθηκε αμέσως μετά την άσκηση (50%) και για 1 -h. Η TAC αυξήθηκε για 3-h μετά την άσκηση κορυφώνοντας στις 2-h (21%). Συμπέρασμα: Το ευνοϊκότερο χρονικό σημείο μετά την άσκηση για δειγματοληψία σε απροπόνητα άτομα είναι: αμέσως μετά την άσκηση για την καταλάση, Ι-h για τα TBARS, 2-h για τις TAC, GSH και GSSG καθώς και 4-h μετά για τα PC.
How sense of power shapes consumers’ evaluative judgements and decisions
Creators: name: Sardanelli, Domenico
Publisher: name: Universita degli studi di Salerno
Year: 2019
Subjects: subject: SECS-P/08 ECONOMIA E GESTIONE DELLE IMPRESE
subject: Power
subject: Consumer behavior
subject: Decision making

description: 2017 - 2018
description: È il potere percepito (o senso di potere) dai consumatori e non il loro potere oggettivo ad avere effetti psicologici e comportamentali diretti. In tre esperimenti, attraverso l’impiego di diversi tipi di disegno sperimentale e di tecniche di conceptual/mindset priming, esamino come il senso di potere influenzi i consumatori nell’ambito della revisione degli atteggiamenti, della valutazione delle informazioni prima di una decisione, e delle tendenze di consumo. Nello specifico, i soggetti che percepiscono alto potere tendono maggiormente a cambiare atteggiamento dopo aver svolto un compito controattitudinale, dimostrano un livello minore di distorsione predecisionale nel processare informazioni concernenti due destinazioni turistiche, e sono più propensi a scegliere un prodotto da auto-assemblare. Tali risultati empirici sollecitano i professionisti di marketing a rivolgersi ai consumatori potenti e influenti o a conferire potere direttamente ai consumatori, al fine di facilitare il passaparola, di ottenere stime non distorte delle preferenze dei consumatori, di favorire le pratiche di auto-produzione e customerization, e dunque, in fin dei conti, di perseguire efficacemente la differenziazione basata sul valore. [a cura dell'Autore]
description: It is consumers’ perceived power (i.e. sense of power), and not their objective power, that directly triggers psychological and behavioral consequences. Across three experiments, by employing different types of experimental designs and instantiating sense of power in participants through conceptual/mindset priming techniques, I examine how power affects consumers in attitude updating, in evaluating information prior to a decision, and in their consumption tendencies. Specifically, high-power subjects are shown to revise more their attitude after a counterattitudinal task, to have lower levels of predecisional distortion of information concerning two travel destinations, and to be more prone to choose a product to self-assemble. The empirical insights gained through this investigation urge marketers and practitioners to target powerful consumers and market influentials or to directly empowers consumers, in order to facilitate word-of-mouth and referrals, to assess unbiased consumers’ preferences, to push self-production practices, customerization, and, ultimately, to effectively pursue value-based differentiation. [edited by Author]
Color kinematic symmetric (BCJ) numerators in a light-like gauge
Creators: name: Vaman, Diana
name: Yao, York-Peng
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Color-ordered tree level scattering amplitudes in Yang-Mills theories can be written as a sum over terms which display the various propagator poles of Feynman diagrams. The numerators in these expressions which are obtained by straightforward application of Feynman rules are not satisfying any particular relations, typically. However, by reshuffling terms, it is known that one can arrive at a set of numerators which satisfy the same Jacobi identity as the corresponding color factors. By extending previous work by us we show how this can be systematically accomplished within a Lagrangian framework. We construct an effective Lagrangian which yields tree-level color-kinematic symmetric numerators in Yang-Mills theories in a light-like gauge at five-points. The five-point effective Lagrangian is non-local and it is zero by Jacobi identity. The numerators obtained from it respect the original pole structure of the color-ordered amplitude. We discuss how this procedure can be systematically extended to higher order.
description: 36 pages
Transmission strings: a technique for spatially mapping exoplanet atmospheres around their terminators
Creators: name: Grant, David
name: Wakeford, Hannah R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Exoplanet transmission spectra, which measure the absorption of light passing through a planet's atmosphere during transit, are most often assessed globally, resulting in a single spectrum per planetary atmosphere. However, the inherent three-dimensional nature of planetary atmospheres, via thermal, chemical, and dynamical processes, can imprint inhomogeneous structure and properties in the observables. In this work, we devise a technique for spatially mapping the atmospheres of exoplanets in transmission. Our approach relaxes the assumption that transit light curves are created from circular stars occulted by circular planets, and instead we allow for flexibility in the planet's sky-projected shape. We define the planet's radius to be a single-valued function of angle around its limb, and we refer to this mathematical object as a transmission string. These transmission strings are parameterised in terms of Fourier series, a choice motivated by these series having adjustable complexity, generating physically practical shapes, while being reducible to the classical circular case. The utility of our technique is primarily intended for high-precision multi-wavelength light curves, from which inferences of transmission spectra can be made as a function of angle around a planet's terminator, enabling analysis of the multidimensional physics at play in exoplanet atmospheres. More generally, the technique can be applied to any transit light curve to derive the shape of the transiting body. The algorithm we develop is available as an open-source package, called harmonica.
description: 15 pages, 8 figures, accepted for publication in MNRAS
The high gas pressure HIP influence on structure and transport properties of $MgB_2$ superconductors of single and multicore composition
Creators: name: Cetner, T.
name: Morawski, A.
name: Rindfleisch, M.
name: Tomsic, M.
name: Presz, A.
name: Gajda, D.
name: Zaleski, A.
name: Tkachenko, O.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Superconducting $MgB_2$ wires in Cu, GlidCop or Monel sheath with Nb or Fe barrier are prepared. Wires vary by sheath material, number of superconducting cores and their chemical composition. Wires are HIP-ed (Hot Isostatic Pressing) at various temperatures ($600-800^oC$) and pressure (up to 1.4 GPa). SEM pictures of cross sections are investigated in order to investigate barrier reactivity and cracking, superconducting material density and grain sizes. Transport measurements are made in magnetic field up to 14 T leading to calculations of critical current density $j_c$ and global pinning force $F_p$. Improvement of transport properties due to higher density of superconducting material is shown.
description: Proceedings of ICMC 2010 Conference - Wroclaw, Poland, 7 pages
$R^{2}$ corrections to the black string instability and the boosted black string
Creators: name: Henríquez-Báez, Carla
name: Oliva, Julio
name: Oyarzo, Marcelo
name: Reyes, Marcel I. Yáñez
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 consider a perturbative Gauss-Bonnet term supplementing the Einstein-Hilbert action, and evaluate its effect on the spectrum of the scalar mode that triggers the Gregory-Laflamme instability of black strings in five dimensional General Relativity. After studying some properties of the static black string, we provide the correction to the Lichnerowicz operator up to $\mathcal{O}(α^2)$. For the scalar mode of the gravitational perturbation, we find a master variable and study its spectrum, providing an analysis of the regime of validity of our scheme. We show that the instability persists under the inclusion of the $R^2$-correction, and that the critical wavelength increases with the value of $α/r_+^2<<1$, providing new evidence of the phenomenon which was already observed in other approaches. We also construct the boosted black strings and compute the correction to the mass, the momentum and the tension due to the higher curvature term. The presence of the dimensionful coupling $α$ spoils the validity of the Smarr relation, which is the gravitational version of the Euler relation which must hold for every homogeneous, thermodynamic system. We show that this identity can be restored by working in an extended thermodynamic setup that includes variations of the Gauss-Bonnet coupling.
description: 14 pages, 3 figures
Comparative modeling of multi-stage production-inventory control policies with lot sizing and advance demand information
Creators: name: Τσικής, Ισίδωρος Ι.
Publisher: name: University of Thessaly
Year: 2003
Subjects: subject: ΠΑΡΑΓΩΓΗ -- ΔΙΟΙΚΗΣΗ ΚΑΙ ΟΡΓΑΝΩΣΗ
subject: ΠΡΟΓΡΑΜΜΑΤΙΣΜΟΣ ΠΑΡΑΓΩΓΗΣ

description: We present a unified framework, which is based on a queuing network modeling representation, for describing, comparing and contrasting simple and hybrid multi-stage productioninventory control policies with lot-sizing and advance demand information (ADI). The simple policies that we consider are reorder point and kanban policies. The hybrid policies are combinations of the simple policies, which can be materialized in a synchronized or an independent way, leading to synchronized and independent hybrid policies, respectively. We then, attempt to describe their basic operations and functions, emphasizing on their advantages and disadvantages. Wherever it is possible, we develop evolution equations, so as to describe in detail the dynamics of each system. Using the above analysis we attempt a comparison of the above systems, emphasizing in equivalencies and superiorities. We consider two cases where in the first, ADI is available and in the second isn’t. The above analysis is carried out for both cases.
Object Retrieval website
Creators: name: Velios, Athanasios
Publisher: name: University of the Arts London
Year: 2022
Subjects: Heritage collections and interpretations

description: In 2009, Simon Gould, a curator working with UCL produced an event about selected objects from the UCL collection with strong public engagement. Ligatus produced the website and documentation platform for the objects and the public responses. This file contains both the source files for the website which was based on Drupal as well as a crawl of the website after the project was finished. The live website is still maintained by UCL here: https://www.ucl.ac.uk/museums-static/objectretrieval/
The aperiodic firehose instability of counter-beaming electrons in space plasmas
Creators: name: Lazar, M.
name: López, R. A.
name: Moya, P. S.
name: Poedts, S.
name: Shaaban, S. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Recent studies have revealed new unstable regimes of the counter-beaming electrons specific to hot and dilute plasmas from astrophysical scenarios. The (counter-)beaming electron firehose instability (BEFI) is induced for highly oblique angles of propagation relative to the magnetic field, resembling the fast growing and aperiodic mode triggered by the temperature anisotropy. It is investigated here for space plasma conditions that includes the influence of an embedding background plasma of electrons and protons. Kinetic theory is applied to prescribe the unstable regimes, and differentiate from the regimes of interplay with other instabilities. Linear theory predicts a systematic inhibition of the BEFI, by reducing the growth rates and the range of unstable wave-number with increasing the relative density of the background electrons. To obtain finite growth rates, the beam speed does not need to be high (just comparable to thermal speed), but beams must be dense enough, with a relative density at least 15-20\% of the total density. The plasma conditions favorable to this instability are reduced under the influence of background electrons. PIC simulations confirm not only that BEFI can be excited in the presence of background electrons, but also the inhibiting effect of this population. In the regimes of transition to electrostatic (ES) instabilities, BEFI is still robust enough to develop as a secondary instability, after the relaxation of beams under a quick interaction with ES fluctuations. BEFI resembles the properties of firehose heat-flux instability triggered by the electron strahl. However, BEFI is driven by a double (counter-beaming) strahl, and develops at oblique angles, which makes it effective in the regularization of the electron counter-beams observed in closed magnetic field topologies and interplanetary shocks.
description: Paper accepted for publication in Astronomy and Astrophysics (12.12.2022)
Sidewinding with minimal slip: Snake and robot ascent of sandy slopes
Creators: name: Marvi, Hamidreza
name: Gong, Chaohui
name: Gravish, Nick
name: Astley, Henry
name: Travers, Matthew
name: Hatton, Ross L.
name: Mendelson, Joseph R.
name: Choset, Howie
name: Hu, David L.
name: Goldman, Daniel I.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Limbless organisms such as snakes can navigate nearly all terrain. In particular, desert-dwelling sidewinder rattlesnakes (Crotalus cerastes) operate effectively on inclined granular media (such as sand dunes) that induce failure in field-tested limbless robots through slipping and pitching. Our laboratory experiments reveal that as granular incline angle increases, sidewinder rattlesnakes increase the length of their body in contact with the sand. Implementing this strategy in a physical robot model of the snake enables the device to ascend sandy slopes close to the angle of maximum slope stability. Plate drag experiments demonstrate that granular yield stresses decrease with increasing incline angle. Together, these three approaches demonstrate how sidewinding with contact-length control mitigates failure on granular media.