cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Diffuse versus square-well confining potentials in modelling $A$@C$_{60}$ atoms
Creators: name: Dolmatov, V. K.
name: King, J. L.
name: Oglesby, J. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Attention: this version-$2$ of the manuscript differs from its previously uploaded version-$1$ (arXiv:1112.6158v1) and subsequently published in 2012 J. Phys. B \textbf{45} 105102 only by a removed typo in Eq.(2) of version-$1$; there was the erroneous factor "2" in both terms in the right-hand-side of the Eq.(2) of version-$1$. Now that the typo is removed, Eq.(2) is correct. A perceived advantage for the replacement of a discontinuous square-well pseudo-potential, which is often used by various researchers as an approximation to the actual C$_{60}$ cage potential in calculations of endohedral atoms $A$@C$_{60}$, by a more realistic diffuse potential is explored. The photoionization of endohedral H@C$_{60}$ and Xe@C$_{60}$ is chosen as the case study. The diffuse potential is modelled by a combination of two Woods-Saxon potentials. It is demonstrated that photoionization spectra of $A$@C$_{60}$ atoms are largely insensitive to the degree $η$ of diffuseness of the potential borders, in a reasonably broad range of $η$'s. Alternatively, these spectra are found to be insensitive to discontinuity of the square-well potential either. Both potentials result in practically identical calculated spectra. New numerical values for the set of square-well parameters, which lead to a better agreement between experimental and theoretical data for $A$@C$_{60}$ spectra, are recommended for future studies.
description: 11 pages, 4 figures
RKKY interaction in graphene
Creators: name: Kogan, E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider RKKY interaction between two magnetic impurities in graphene. The consideration is based on the perturbation theory for the thermodynamic potential in the imaginary time representation. We analyze the symmetry of the RKKY interaction on the bipartite lattice at half filling. Our analytical calculation of the interaction is based on direct evaluation of real space spin susceptibility. We show in the Appendix, added to the published version, that the approach can be easily generalized to the case of finite temperature.
description: LaTeX, 7 pages. We show in the Appendix, added to the published version, that the approach can be easily generalized to the case of finite temperature
Phosphoinositide im Kern pflanzlicher Zellen - Kernlokalisierung der ubiquitären PI4P 5-Kinase PIP5K2 und ihr Einfluss auf die Entwicklung von Arabidopsis thaliana
Creators: name: Gerth, Angela Katharina
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2018
Subjects: subject: 572

description: Phosphatidylinositol-4,5-Bisphosphat (PtdIns(4,5)P2) ist ein Signallipid und liegt in geringen Mengen in eukaryotischen Membranen vor. Tierisches PtdIns(4,5)P2 besitzt neben Plasmamembran-assoziierten Funktionen auch Funktionen im Zellkern, z. B. Zellzyklusregulation. Bei starker Überexpression lokalisieren auch fluoreszenzmarkierte PtdIns(4,5)P2-synthesierende PI4P 5-Kinasen im pflanzlichen Zellkern. In dieser Arbeit wurde die Kernlokalisierung von Arabidopsis PIP5K2 untersucht. PIP5K2 besitzt zwei funktionale NLS, die den Transport eines cytosolischen Proteins in den Zellkern vermitteln. Die Substitution von NLS IV resultierte in einer reduzierten Kernlokalisierung von PIP5K2AAA. In Kombination mit der Interaktion von PIP5K2 mit α-Importinen legen diese Daten den Schluss nahe, dass PIP5K2 aktiv in den Zellkern transportiert wird. Verbleibende Phänotypen in Komplementationsstudien der pip5k1 pip5k2-Doppelmutante mit PIP5K2AAA und die Interaktion von PIP5K2 mit dem Zellzyklusregulator Retinoblastoma related1 geben Hinweise darauf, dass PIP5K2 neben cytoplasmatischen auch kernlokalisierte Funktionen besitzt.
description: Phosphatidylinositol-4,5-bisphosphat (PtdIns(4,5)P2) is a minor regulatory phospholipid in membranes of eukaryotes. Besides cytoplasmic or plasma membrane associated functions, human PtdIns(4,5)P2 also possesses nuclear functions like cell cycle regulation. In plants, overexpression of PI4P 5 kinases, enzymes synthezing PtdIns(4,5)P2, lead to an accumulation of PI4P 5-kinase in the nucleus. This study investigated the nuclear localization of Arabidopsis PIP5K2. PIP5K2 comprises two functional NLSs, NLSIV and NLSVI, which mediate nuclear transport of a cytosolic protein. Substitution of NLS IV in PIP5K2 (PIP5K2AAA) results in reduced nuclear localization. Additionally, PIP5K2 interacts with α-importins. In summary, the results suggest an active transport of PIP5K2 into the nucleus. Furthermore, remaining phenotypes in complementation studies of pip5k1 pip5k2 double mutant with PIP5K2AAA as well as interaction of PIP5K2 with cell cycle regulator Retinoblastoma related1 give hints towards nuclear functions of plant phosphoinositides.
title: Carlos Blanco Aguinaga o la literatura como motor de la historia
Creators: name: Buj, Joseba
Publisher: name: Iberoamericana/Vervuert
Year: 2021
Subjects: subject: 860

description: Bibliotheca Ibero-Americana, vol. 185Políticas y estrategias de la crítica, II: ideología, historia y actores de los estudios literarios, p. 187
Optimal regularity in the obstacle problem for Kolmogorov operators related to American Asian options
Creators: name: Frentz, Marie
name: Nystrom, Kaj
name: Pascucci, Andrea
name: Polidoro, Sergio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: MAT/05 Analisi matematica
SECS-S/06 Metodi matematici dell'economia e delle scienze attuariali e finanziarie

description: In this paper we prove optimal interior regularity for solutions to the obstacle problem for a class of second order differential operators of Kolmogorov type. We treat smooth obstacles as well as non-smooth obstacles. All our proofs follow the same line of thought and are based on blow-ups, compactness, barriers and arguments by contradiction. This problem arises in financial mathematics, when considering path-dependent derivative contracts with the early exercise feature.
The impact of lipid constraints on model membranes [Kumulative Dissertation]
Creators: name: Hoffmann, Matthias
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 540

description: Was bestimmt das Verhalten von Lipiden in Lipidmodellmembranen? Die Antwort auf diese Frage betrifft fast alle biochemischen und biophysikalischen Untersuchungen an Modellen von Biomembranen. Trotz der Vielzahl an möglichen Einflüssen, hervorgerufen durch strukturelle Unterschiede der Lipide oder die Zugabe von membranassoziierten Fremdmolekülen, werden diese häufig nicht im Detail betrachtet. In dieser Dissertation wird die Wirkung verschiedener Faktoren auf eine Auswahl an Lipidmodellmembranen dargestellt. Um den vielfältigen Einflussmöglichkeiten und der unterschiedlichen Komplexität verschiedener Modellsysteme gerecht zu werden, ist diese Arbeit in zwei Projekte aufgeteilt: die Erforschung (i) des Einflusses einer intramolekularen Änderung der Lipide auf Monoschichten an der Wasser-Luft-Grenzfläche und (ii) der Einflüsse von drei amphiphilen Copolymeren auf Lipiddoppelschichten eines Modelllipids und zwei myelinartiger Lipidmischungen in polymergestützten Lipidnanodiscs.
description: What are the main influences governing the behavior of lipids within lipid model membranes? This question concerns nearly all membrane-related biochemical and biophysical research. However, in many cases the consequences of structural variations within the involved lipids or the impact of exogenous molecules, that are introduced during the study, are not addressed. This thesis aims at giving answers to this main question in the context of some exemplary model systems. To address different possibilities in influencing lipid behavior and the varying complexity of well-established lipid model membranes, this thesis is divided into two main projects: the study of (i) the impact of an intramolecular change within the lipids in monolayers at the air/water interface and of (ii) the effect of three amphiphilic copolymers on lipid bilayers, consisting of either a simple model lipid or myelin-like complex lipid mixtures, during the formation of polymer-encapsulated nanodiscs.
Extensions to the multiplier method for inferring population size
Creators: name: Meng, Vivian Yun
Publisher: name: University of British Columbia
Year: 2014

description: Estimating population size is an important task for epidemiologists and ecologists alike, for purposes of resource planning and policy making. One method is the "multiplier method" which uses information about a binary trait to infer the size of a population. The first half of this thesis presents a likelihood-based estimator which generalizes the multiplier method to accommodate multiple traits as well as any number of categories (strata) in a trait. The asymptotic variance of this likelihood-based estimator is obtained through the Fisher Information and its behaviour with varying study designs is determined. The statistical advantage of using additional traits is most pronounced when the traits are uncorrelated and of low prevalence, and diminishes when the number of traits becomes large. The use of highly stratified traits however, does not appear to provide much advantage over using binary traits. Finally, a Bayesian implementation of this method is applied to both simulated data and real data pertaining to an injection-drug user population. The second half of this thesis is a first systematic approach to quantifying the uncertainty in marginal count data that is an essential component of the multiplier method. A migration model that captures the stochastic mechanism giving rise to uncertainty is proposed. The migration model is applied, in conjunction with the multi-trait multiplier method, to real-data from the British Columbia Centre for Disease Control.
A Unified Probabilistic View of Nonparametric Predictors via Reproducing Kernel Hilber Spaces
Creators: name: Bee Dagum, Estela
name: Bianconcini, Silvia
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: SECS-S/01 Statistica
SECS-S/03 Statistica economica

description: We provide a common approach for studying several nonparametric estimators used for smoothing functional data. Linear filters based on different building assumptions are transformed into kernel functions via reproducing kernel Hilbert spaces. For each estimator, we identify a density function or second order kernel, from which a hierarchy of higher
order estimators is derived. These are shown to give excellent representations for the currently applied symmetric filters. In particular, we derive equivalent kernels of smoothing splines in Sobolev and polynomial spaces.
The asymmetric weights are obtained by adapting the kernel functions to the length of the various filters, and a theoretical and empirical comparison is made with the classical estimators used in real time analysis.
The former are shown to be superior in terms of signal passing, noise suppression and speed of convergence to the symmetric filter.
Finding the balance: the University of Bologna E-Learning  Centre strategy  for lifelong learning in a complex environment
Creators: name: Comba, Valentina
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: M-PED/03 Didattica e pedagogia speciale

description: The aim of this paper is to present the University of Bologna’s E-Learning Centre strategy
for quality e-learning courses production and delivery, with special regards to lifelong
learning. The starting point was very complex since the University lacked a harmonised
student approach, teaching styles, and so forth. The experimental phases of e-learning
implied also the use of a number of different platforms. Since 2006 the Rector and the
Academic Senate introduced a step by step strategy in order to harmonise projects,
introduce quality technological and teaching guidelines, and improve lifelong learning offer.
An E-Learning Centre was established and new regulations were approved for master
degree courses, with reference to the e-learning utilization. Since 2007 the University of
Bologna Strategic Plan has focussed on e-learning in the European context and strategic
issues. Main issues include: a) delivery of blended learning courses in compliance with the
University of Bologna information systems (authentication system, Academic Courses
databases and so forth) b) keeping up with technological change such as LMSs and learners’
technical access to the e-content c) developing partnerships and e-learning based joint
international master degrees for lifelong learning with other European Universities and
Institutions. The paper highlights some critical aspects and the first results of the E-Learning
Centre activities.
Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations
Creators: name: Amelot, Morgane
name: Tixier, Paul
Publisher: name: figshare
Year: 2021
Subjects: subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Jolly-Seber capture-mark-recapture models to estimate Crozet regular and type-D Killer whales populations. All codes are available for the simulation, the real data and the trends analysis (1) Simulation code (codesimul.R) is running alone. (2) Real data code (code_vraidata_revfin.R) makes use of three matrices that change depending on the ecotype: - The Capture History (CH_2106_m.csv, CH_2106_d.csv), rows correspond to individuals and columns to years. For regular killer whales this matrix contains 3 possible observations (observed from the coast, observed depredating, non observed) and 2 observations for Type-D killer whales (observed depredating, non observed) - The Marking status (Mk_2106_m.csv, Mk_2106_d.csv), rows correspond to individuals and columns to years. For both ecotype they contain three possible marking status as described in the ESM. - The maturity status (St_2106_m.csv, St_2106_d.csv), rows correspond to individuals and columns to years. For both ecotype they contain four different states (non identify, new-born, juvenile and adult). Two other matrices are the same for both ecotypes - The standardized effort (Effort_stand_boat.csv) contains the yearly effort divided by the maximum number of photographs taken during the study period. - The state matrix (z_init_cro2705.csv) is used to initiate the state matrix from the models. (3) The trend_test.R file presents the extraction of model outputs (regular killer whales: CrozetFinrevfinfin.Rdata, Type-D killer-whales: DFinrevfinfin.Rdata) and their analysis trough different linear and non linear models.
title: De lo racial a lo lingüístico: cómo leer a Pedro Henríquez Ureña hoy
Creators: name: Valdez, Juan
Publisher: name: Iberoamericana/Vervuert
Year: 2021
Subjects: subject: 860

description: Bibliotheca Ibero-Americana, vol. 185Políticas y estrategias de la crítica, II: ideología, historia y actores de los estudios literarios, p. 205
Stable Langmuir solitons in plasma with diatomic ions
Creators: name: Dvornikov, Maxim
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: We study stable axially and spherically symmetric spatial solitons in plasma with diatomic ions. The stability of a soliton against the collapse is provided by the interaction of induced electric dipole moments of ions with rapidly oscillating electric field of a plasmoid. We derive the new cubic-quintic nonlinear Schrodinger equation which governs the soliton dynamics and numerically solve it. Then we discuss the possibility of implementation of such plasmoids in realistic atmospheric plasma. In particular, we suggest that spherically symmetric Langmuir solitons, described in the present work, can be excited at the formation stage of long-lived atmospheric plasma structures. The implication of our model for the interpretation of the results of experiments for the plasmoids generation is discussed.
description: 13 pages, two columns, LaTeX2e, 2 eps figures; paper was significantly revised, secs. 2-4 were modified, figures were replotted, several new references were included; version accepted for publication in Nonlinear Processes in Geophysics (European Geosciences Union, Copernicus Publications)
title: La crítica literaria al servicio de la revolución: José Carlos Mariátegui lee a su autor favorito Panait Istrati
Creators: name: Bosshard, Marco
Publisher: name: Iberoamericana/Vervuert
Year: 2021
Subjects: subject: 860

description: Bibliotheca Ibero-Americana, vol. 185Políticas y estrategias de la crítica, II: ideología, historia y actores de los estudios literarios, p. 227
title: Cornejo Polar, lector de Arguedas: una arqueología crítico-literaria
Creators: name: Prieto, Julio
Publisher: name: Iberoamericana/Vervuert
Year: 2021
Subjects: subject: 860

description: Bibliotheca Ibero-Americana, vol. 185Políticas y estrategias de la crítica, II: ideología, historia y actores de los estudios literarios, p. 243
Implementation and evaluation of an advanced tool for the annotation of authentic audio resources in second language instruction
Creators: name: Donald, David
name: Gianninoni, Riccardo
name: Goldman, Jerry
name: Lister, Maureen
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: L-LIN/02 Didattica delle lingue moderne
INF/01 Informatica

description: Project Pad, an open-source endeavor under development at Northwestern University, is an integrated web-based set of tools for searching, organizing, annotating and analyzing objects from digital repositories, for integrating those objects and analyses into web-based projects and for group exchange and decision making. It supports synchronous interaction between users and interaction with media objects themselves, such as the segmentation and annotation of streamed audio or video. These annotations can be permanently stored and searched transversally. Techniques for the integration of Project Pad into legal English courses at CILTA, the University of Bologna language centre, are presently being tested. Analysis of student feedback in the form of reports and recordings, as well as the XML data logs, will be used to establish criteria for the evaluation of students' linguistic choices during annotation, their behaviour and expectations when dealing with unfamiliar audio content and for the development and assessment of micro- and macro-listening comprehension skills. It is also hoped to gain deeper insight into modes of interaction between language learners in relation to streamed media content.
Percezione visiva del colore: "un caso di analisi del colore in ambito musivo"
Creators: name: Casagrande, Francesca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: FIS/07 Fisica applicata (a beni culturali, ambientali, biologia e medicina)
CHIM/12 Chimica dell'ambiente e dei beni culturali

description: Come si determina la percezione del colore? La domanda ha interessato generazioni di studiosi, ne è conferma la continua analisi alla quale è sottoposta ancora oggi la visione del colore da parte dei fisici, ottici, neurologi e fisiologi.
Lo studio sul colore mette in evidenza la diversità di “linguaggio” degli artisti (campo estetologico), con quello degli scienziati che si occupano di colorimetria. La corretta utilizzazione di un glossario relativo al colore permetterà e migliorerà la comunicabilità tra storici dell’arte e scienziati.
The response of solitary bees to landscape configuration with focus on body size and nest-site preference
Creators: name: Everaars, Jeroen
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2012
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 595
subject: 590

description: Die Abnahme wild lebender Bestäuber war die Motivation, um die Auswirkung von Landschaftskonfiguration auf verschiedene Solitärbienentypen (unterschiedlich in Körpergröße und Nestsubstrat-Präferenz) mit einem räumlich expliziten und individuen-basierten Modell zu untersuchen. Es zeigte sich, dass das Verhältnis von Verfügbarkeit von Nestsubstrat und Futterpflanzen bestimmte, wie Bienen mit der Landschaft interagieren und die Bestäubungsleistung verbessert werden kann. Im Modell beeinflusste die Nestsubstrat-Präferenz, wie Habitate genutzt werden, während die Körpergröße das Verhalten und die Leistung der Bienen beeinflusste. Eine experimentelle Fallstudie für einen der Bienentypen (Osmia bicornis, ein Hohlraum-Brüter mittlerer Körpergröße) bestätigte, dass sowohl die Verfügbarkeit von Nestsubstrat und Futterpflanzen wichtig sind, ebenso wie lokale Bedingungen in Nestnähe. Landschaftsfragmentierung kann die Futtersuche erleichtern, weil mehr Randstruktur zu mehr Nistangebot, verbesserter Zugänglichkeit zu Futterpflanzen und reduzierter lokaler Konkurrenz zwischen Bienen führt.
description: The rapid decline of wild pollinators was the motivation to investigate the effect of landscape configuration on the performance of different solitary bees (differing in body size and nesting guild, parameterized extensively with literature data) with a spatially-explicit individual-based model. It was found that the ratio of nest habitat availability and foraging habitat availability determines how bees interact with the landscape and that a high ratio improves their performance and pollination services. Nesting guild affected habitat usage in the model, while body size affected the behaviour and the performance of bees. It was also found that a better coverage of pollination was associated with lower pollination distances. An experimental case study for one bee type (Osmia bicornis, a cavity-nesting bee of intermediate size) confirmed the importance of both nest habitat and foraging in addition to important microsite conditions. Fragmentation can improve foraging performance and accessibility to foraging resources by a higher availability of nesting sites in edge structures, which leads to reduced local competition between bees.
The Dark Energy Paradigm
Creators: name: Sidharth, Burra G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Though the concept of a dark energy driven accelerating universe was introduced by the author in 1997, to date dark energy itself, as described below has remained a paradigm. A model for the cosmological constant is suggested.
description: 12 pages latex. From Proc. FFP11, Paris, AIP, N.Y. arXiv admin note: substantial text overlap with arXiv:physics/0411224, arXiv:0803.4302
Metodologia per la mappatura, l'analisi e la progettazione dei flussi fisici e informativi di un'azienda
Creators: name: Bianchini, A
name: Pacini, V
name: Pascale Guidotti Magnani, N
name: Saccani, C
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: ING-IND/17 Impianti industriali meccanici

description: In questo articolo sono riportati i risultati della mappatura, dell’analisi e progettazione dei flussi fisici ed informativi di un’azienda di processo. Dopo una breve introduzione ai processi aziendali viene descritto l’approccio metodologico adottato per la mappatura e l’analisi dei flussi con lo scopo di definirne i costi e le criticità. A valle dell’individuazione delle criticità è stata svolta la progettazione di una soluzione nell’ottica di valorizzare l’esistente ed inserire alcune innovazioni strutturali ed organizzative in grado di bilanciare il peso economico dell’attività sul processo. Sono state condotte anche altre analisi nell’ottica di generare un quadro completo della situazione della logistica aziendale. Della soluzione proposta è stato fatto uno studio di fattibilità che mostra la redditività degli interventi proposti.
Computing residue currents of monomial ideals using comparison formulas
Creators: name: Lärkäng, Richard
name: Wulcan, Elizabeth
Publisher: name: arXiv
Year: 2012
Subjects: subject: Complex Variables (math.CV)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics

description: Given a free resolution of an ideal $\mathfrak{a}$ of holomorphic functions, one can construct a vector-valued residue current, $R$, which coincides with the classical Coleff-Herrera product if $\mathfrak{a}$ is a complete intersection ideal and whose annihilator ideal is precisely ~$\mathfrak{a}$. We give a complete description of $R$ in the case when $\mathfrak{a}$ is an Artinian monomial ideal and the resolution is the hull resolution (or a more general cellular resolution), extending previous results by the second author. The main ingredient in the proof is a comparison formula for residue currents due to the first author. By means of this description we obtain in the monomial case a current version of a factorization of the fundamental cycle of $\mathfrak{a}$ due to Lejeune-Jalabert.
description: 21 pages
Probing non-collinear spin textures using variable temperature magnetic force microscopy
Creators: name: Sharma, Ankit Kumar
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 530

description: In dieser Arbeit werden verschiedene Arten nicht-kollinearer Spin-Texturen in Kristallen und dünnen Filmen drei nicht-zentralsymmetrischer Verbindungen mit Magnetkraftmikroskopie bei variabler Temperatur untersucht. Zunächst werden die Eigenschaften von Antiskyrmionen in einkristallinen Lamellen der Heusler-Verbindung Mn1.4PtSn untersucht, die eine Kristallstruktur mit D2d-Symmetrie aufweist. Eine wesentliche Entdeckung dieser Arbeit war die extreme Abstimmbarkeit der Größe des Antiskyrmions und der Periode des helikalen Zustands, wenn die Dicke der Lamelle erhöht wird. Zweitens werden Spintexturen in epitaktisch gewachsenen dünnen Filmen der Heusler-Verbindung, Mn2RhSn, untersucht, die ebenfalls D2d-Symmetrie aufweist. Diese Arbeit ebnet den Weg zur Realisierung skyrmionischer Bauelementen auf Grundlage von Heusler-Dünnschichten. Drittens wurden Néel-Skyrmionen in der einkristallinen Lamelle der Verbindung PtMnGa entdeckt, von der wir gezeigt haben, dass sie eine nicht-zentralsymmetrische Kristallstruktur aufweist. Diese Verbindung ist das erste metallische System, in dem Néel-Skyrmionen beobachtet wurden.
description: In this thesis, various kinds of non-collinear spin textures are investigated in bulk crystals and thin films of three non-centrosymmetric compounds using variable temperature magnetic force microscopy. First, the properties of antiskyrmions are studied in single-crystalline lamellae of the Heusler compound Mn1.4PtSn that has a crystal structure with D2d symmetry. A major discovery of this work was the extreme tunability of the size of the antiskyrmion and the period of the helical state as the thickness of the lamella is increased. Secondly, spin textures are explored in epitaxially grown thin films of another Heusler compound, Mn2RhSn, that also has D2d symmetry. This work paves the way to the realization of Heusler thin films based skyrmionic devices. Thirdly, Néel skyrmions are discovered in the single crystalline lamella of the compound PtMnGa which we showed has a non-centrosymmetric crystal structure. This compound is the first metallic system in which Néel skyrmions have ever been observed.
Effect of orthodontic treatment on the upper airway volume
Creators: name: Tam, Isaac Timothy
Publisher: name: University of British Columbia
Year: 2014

description: Introduction: Currently, the influence of orthodontic treatment on the volume of the upper airway is not well understood. The aim of this study is to examine the effects of orthodontic treatment both with and without extractions on the anatomical characteristics of the upper airway in adults. Methods: For this retrospective study, the pre and post orthodontic treatment CBCT scans of adult patients treated at the UMN Division of Orthodontics between 2008 and 2012 were reviewed. From a pool of 1680 patient records, 74 patients met the eligibility criteria of the study and were included for further analysis. 3D imaging analysis software was used to segment and measure upper airway regions including the nasopharynx (NP), the retropalatal (RP) and retroglossal (RG) areas of the oropharynx, as well as total airway (TA). Coefficient of variation and the intraclass correlation coefficient were calculated. The Wilcoxon signed-rank test was used to compare volumetric and minimal cross-sectional area changes from pre (T0) to post (T1) treatment. Results: The reliability was high for all measurements with an ICC ≥0.82. Cephalometric analysis revealed no significant skeletal changes from T0 to T1. The T0 to T1 treatment changes for the upper airway for the extraction and non-extraction groups were as follows: TA: 1039.6 ± 3674.3mm³ vs. 1719.2.2 mm³ ± 4979.2, NP: 136.1 mm³ ± 1379.3 vs -36.5 mm³ ± 1139.8, RP: 412.7 mm³ ± 3042.5 vs. 399.3 mm³ ± 3294.6 , and RG 412.5mm³ ± 1503.2 vs. 1109.3mm³ ± 2328.6, respectively. The treatment changes for all airway regions examined were not significantly (p>0.05) different between the extraction and non-extraction groups. Similarly, changes in the minimum cross-sectional area were also not significantly different between the two types of treatment. Conclusions: Orthodontic treatment in adults does not cause clinically significant changes to the volume or minimally constricted area of the upper airway.
title: Roberto Fernández Retamar: la teoría de la literatura latinoamericana como capítulo de la Guerra Fría
Creators: name: Rojas, Rafael
Publisher: name: Iberoamericana/Vervuert
Year: 2021
Subjects: subject: 860

description: Bibliotheca Ibero-Americana, vol. 185Políticas y estrategias de la crítica, II: ideología, historia y actores de los estudios literarios, p. 259
Shockley-Ramo theorem and long-range photocurrent response in gapless materials
Creators: name: Song, Justin C. W.
name: Levitov, Leonid S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Scanning photocurrent maps of gapless materials, such as graphene, often exhibit complex patterns of hot spots positioned far from current-collecting contacts. We develop a general framework that helps to explain the unusual features of the observed patterns, such as the directional effect and the global character of photoresponse. We show that such a response is captured by a simple Shockley-Ramo-type approach. We examine specific examples and show that the photoresponse patterns can serve as a powerful tool to extract information about symmetry breaking, inhomogeneity, chirality, and other local characteristics of the system.
description: 7 pgs, 3 fgs
Decomposing productivity differential: evidence from foreign owned and domestic firms in Italy
Creators: name: Bernardini Papalia, Rosa
name: Pinuccia, Calia
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: SECS-S/03 Statistica economica

description: Using the idea of the multidimensional generalization of the Duncans’ index (Silber 1992), the productivity per worker differential across groups of firms can be decomposed into different components attributed to differences in: sectoral productivity, investment in human and physical capital, employment and other determinants. More specifically, for decomposing group productivity differential we propose an Oaxaca’s decomposition – based approach which assumes a Reimer’s weighting scheme An application of the decomposing method aimed at evaluating productivity differences across foreign owned and domestic firms in Italy is also provided.
Uniqueness in the Cauchy problem for a class of hypoelliptic ultraparabolic operators
Creators: name: Cinti, Chiara
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: MAT/05 Analisi matematica

description: We consider a class of hypoelliptic ultraparabolic operators in the form L = (X_1)^2 + ... + (X_m)^2 + X_0 - \partial_t, under the assumption that the vector fields X_1, ..., X_m and X_0-\partial_t are invariant with respect to a suitable homogeneous Lie group G. We show that if u,v are two solutions of Lu = 0 on R^Nx]0,T[ and u(x,0)=\phi, then each of the following conditions: |u(x,t)-v(x,t)| can be bounded by M exp(c(|x|_G)^2), or both u and v are non negative, implies u=v. We use a technique which relies on a pointwise estimate of the fundamental solution of L.
title: Antonio Candido y Ángel Rama: críticos radicales, ¿crítica radical?
Creators: name: Rocca, Pablo
Publisher: name: Iberoamericana/Vervuert
Year: 2021
Subjects: subject: 860

description: Bibliotheca Ibero-Americana, vol. 185Políticas y estrategias de la crítica, II: ideología, historia y actores de los estudios literarios, p. 271
Bayesian Methods for Analysis and Adaptive Scheduling of Exoplanet Observations
Creators: name: Loredo, Thomas J.
name: Berger, James O.
name: Chernoff, David F.
name: Clyde, Merlise A.
name: Liu, Bin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Applications (stat.AP)
subject: Computation (stat.CO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We describe work in progress by a collaboration of astronomers and statisticians developing a suite of Bayesian data analysis tools for extrasolar planet (exoplanet) detection, planetary orbit estimation, and adaptive scheduling of observations. Our work addresses analysis of stellar reflex motion data, where a planet is detected by observing the "wobble" of its host star as it responds to the gravitational tug of the orbiting planet. Newtonian mechanics specifies an analytical model for the resulting time series, but it is strongly nonlinear, yielding complex, multimodal likelihood functions; it is even more complex when multiple planets are present. The parameter spaces range in size from few-dimensional to dozens of dimensions, depending on the number of planets in the system, and the type of motion measured (line-of-sight velocity, or position on the sky). Since orbits are periodic, Bayesian generalizations of periodogram methods facilitate the analysis. This relies on the model being linearly separable, enabling partial analytical marginalization, reducing the dimension of the parameter space. Subsequent analysis uses adaptive Markov chain Monte Carlo methods and adaptive importance sampling to perform the integrals required for both inference (planet detection and orbit measurement), and information-maximizing sequential design (for adaptive scheduling of observations). We present an overview of our current techniques and highlight directions being explored by ongoing research.
description: 29 pages, 11 figures. An abridged version is accepted for publication in Statistical Methodology for a special issue on astrostatistics, with selected (refereed) papers presented at the Astronomical Data Analysis Conference (ADA VI) held in Monastir, Tunisia, in May 2010. Update corrects equation (3)
Einflüsse auf das emotionale Erleben nach dem PANA-Modell - Arbeitsbelastung und Circadianrhythmik
Creators: name: Lehr, Annette
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2015
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 158

description: Die vorliegende Arbeit untersucht den Einfluss von internalen und externalen Faktoren auf das emotionale Erleben. Emotionales Erlebens wurde durch die beiden bipolaren Dimensionen Positiver Affekt (PA, Aktivierungsdimension) und Negativer Affekt (NA, Valenzdimension operationalisiert (vgl. Watson & Tellegen, 1985; Triemer, 2003). Als externale Faktoren wurden die Arbeitsmerkmale Arbeitsintensität, Tätigkeitsspielraum und Soziale Unterstützung in ihrem Effekt auf PA und NA untersucht. Zur Überprüfung der Annahmen zur Circadianrhythmik als internalem Faktor erfolgte ein 24-h ambulantes Assessment zu zwei verschiedenen Messzeiträumen (Frühschicht vs. Spätschicht) an 49 Arbeitstätigen aus der Dienstleistungsbranche. Im Rahmen eines Mehr-Ebenen-Modells konnten die Annahmen zur Circadianrhythmik bestätigt werden: PA unterlag einem Effekt der Zeit und wird folglich internal gesteuert. NA unterschied sich zwischen den Messzeiträumen bedeutsam, was einen Einfluss der Circadianrhythmik ausschließen lässt. Weiterhin zeigte sich für NA, dass je besser die Arbeitsgestaltung, desto höher war NA und damit die aktuelle Stimmung.
description: The present work deals with the internal and external influences on emotional experience at work. Emotional experience was operationalized by two bipolar dimensions of affect, positive affect (PA, activation-deactivation) and negative affect (NA, good-bad mood), in a modified version of Positive Affect Negative Affect Model developed by Watson and Tellegen (1985). Different work characteristics (workload, control, social support) were used as external factors and their influence on PA and NA was measured. Moreover, the influence of circadian rhythm as internal factor was analyzed by the experienced sampling method. 49 employees from service industry were studied during two periods of time (morning shift vs. late shift) across a 24-hour ambulatory monitoring. The results of multilevel-analysis showed that PA underlies a circadian rhythm as postulated. A significant difference between morning shift and late shift in NA was assigned, thus NA does not appear to be influenced by circadian rhythms. External influence in the form of work characteristics (workload, social support) was found for NA but not for PA.
Kato's residue homomorphisms and reciprocity laws on arithmetic surfaces
Creators: name: Liu, Dongwen
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 14H25, Secondary 11S70

description: We explicitly study Kato's residue homomorphisms in Milnor $K$-theory, which are closely related to Contou-Carrère symbols. As applications we establish several reciprocity laws for certain locally defined maps on $K$-groups that are associated to arithmetic surfaces.
description: Substantially revised based a referee report
Giant red shift and enhancement of resonant light confinement in planar array of dielectric bars
Creators: name: Khardikov, Vyacheslav
name: Iarko, Ekaterina
name: Prosvirnin, Sergey
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Results of research of resonant phenomena in planar periodic structures consisted of dielectric elements are presented. A problem of plane wave diffraction by a structure which a periodic cell is composed of two dielectric bars with different lengths has been solved. For the first time an existence of high Q-factor trapped mode resonances are revealed in these structures. The main difference of studied structure in contrast to the planar structure with a single dielectric bar in the unit cell is appearing of a great red shift of a trapped mode resonant wavelength. The red shift is caused by strong coupling of electromagnetic fields in neighbor dielectric bar resonators. This property is very attractive to design resonant periodic planar structures by using moderate refractive index materials like semiconductors within their transparency window. In the near infrared band, the trapped mode resonances of periodic planar structure with bars made of germanium have been studied. It is shown that decreasing of structure asymmetry degree results in increasing of both red shift and Q-factor of resonance.
description: 13 pages, 7 figures
Despre Natura Intimității la Locul de Muncă - Riscurile (Proto)științei Managementului
Creators: name: Cocoș, Bogdan
Publisher: name: Zenodo
Year: 2021

description: Management-ul este prezentat, deseori, de către responsabilii luării de decizii organizaționale, drept granița dintre „știință” și „artă”. În acest sens, articolul de față va trata un subiect controversat, anume confidențialitatea, intimitatea, taina specifică locului de muncă, din punctul de vedere preferat al responsabililor anterior menționați. O astfel de realitate este de sperat că va reliefa riscurile înțelegerii și ale aplicării eronate ale concluziilor extrase din cercetările cu caracter științific. Finalmente, va fi prezentată și o critică la adresa considerentelor exagerate conform cărora „știința” de la bazele management-ului ar fi una robustă și greu contestabilă sau, la polul opus, o „pseudoștiință”.
Dynamical Equations and Lagrange--Ricci Flow Evolution on Prolongation Lie Algebroids
Creators: name: Bubuianu, Laurenţiu
name: Vacaru, Sergiu I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 53C44, 17B66, 37J60, 53D17, 70G45, 70S05

description: The approach to nonholonomic Ricci flows and geometric evolution of regular Lagrange systems [S. Vacaru: J. Math. Phys. \textbf{49} (2008) 043504 \& Rep. Math. Phys. \textbf{63} (2009) 95] is extended to include geometric mechanics and gravity models on Lie algebroids. We prove that such evolution scenarios of geometric mechanics and analogous gravity can be modelled as gradient flows characterized by generalized Perelman functionals if an equivalent geometrization of Lagrange mechanics [J. Kern, Arch. Math. (Basel) \textbf{25} (1974) 438] is considered. The R. Hamilton equations on Lie algebroids describing Lagrange-Ricci flows are derived. Finally, we show that geometric evolution models on Lie algebroids are described by effective thermodynamical values derived from statistical functionals on prolongation Lie algebroids.
description: latex2e, 11pt, 25 pages, v3 substantially modified with a changed title and new co-author - accepted to Can. J. Phys
An adaptive procedure for estimating and comparing the old-age mortality in a long historical perspective: Emilia-Romagna, 1871-2001
Creators: name: Roli, Giulia
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: SECS-S/01 Statistica
SECS-S/04 Demografia
SECS-S/05 Statistica sociale

description: When the goal of a study is to assess and compare the evolution of old mortality, the researchers often face with problems of defects in data, such as loss of accuracy and numerical inconsistency of information. In the present work, an adaptive procedure for the issue of survival estimations is proposed as a combination of several methods: spline interpolation to split grouped data into age-specific quantities; use of mortality models for estimating the risk of death at advanced ages; methods for choosing the fitting age range based on the analysis of life-table aging rates. The procedure is applied to Emilia-Romagna data in order to construct complete period life tables corresponding to the occurrence of each population census from 1871 to 2001, and, finally, to compare the measures of old-age mortality by time and sex.
Pedagogies and Practice: How Religious Diversification Impacts Seminaries and Clergy
Creators: name: Tiffany, Austin Robert
Publisher: name: Apollo - University of Cambridge Repository
Year: 2019
Subjects: Interfaith
seminary
sociotheology
sociology of religion
religious diversity
USA
UK
interfaith education
theological education
religious diversification
Church of England
Anglo-Jewry
Mainline Protestantism
Evangelical Protestantism
education
social change
social action
religious authority
clergy
priests
rabbis

description: This thesis considers how religious diversification has shaped the roles of clergy and seminaries. The focus of this qualitative, interview-based study is seminaries and clergy affiliated with various denominations of Judaism and Protestant Christianity in greater London and New York City. Religiously diversifying societies in the US and England have brought forth new challenges for clergy and seminaries, prompting new questions about how or why a faith community should or should not engage with diversity in the public square. This study investigates how seminaries and individual members of the clergy, as sources of religious authority, are responding to religious diversification in different ways – the former sluggish to recognise the impact of religious diversification in curriculum and pedagogical structures and the latter seeing it as a resource for social action initiatives, local networks, and political activism. This has created a gap between training and practice whereby clergy have assumed greater religious authority in religious life. Beyond contributing to the field of sociology of religion, this thesis concludes by allowing the experience of clergy in interreligious engagement to inform appropriate pedagogies that could be employed by seminaries.
description: I am grateful to the Woolf Institute and Cambridge Trust, the Spalding Trust, Fitzwilliam College, and Hillside Church for their financial assistance throughout the course of this PhD.
Messungen der Methanemission an einzelnen Kühen mithilfe des Laser-Methan-Detektors und genetisch-statistische Analyse daraus definierter Phänotypen
Creators: name: Mühlbach, Sarah
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 630

description: Methan (CH4) ist ein Produkt der Verdauung von Kühen. Dessen Bildung stellt einen Energieverlust für das Tier dar und trägt durch sein hohes Treibhauspotenzial zur Klimaerwärmung bei. Eine Möglichkeit zur Senkung der CH4-Emissionen ist die Zucht auf emissionsarme Kühe. Dazu wurde untersucht, ob der Laser-Methan-Detektor (LMD) eine adäquate Messmethode darstellt, um unter Praxisbedingungen die CH4-Emissionen vieler Tiere zu messen und aus den generierten Daten Heritabilitäten zu neuen CH4-Merkmalen zu schätzen. Mit dem entwickelten Messprotokoll war es möglich, standardisierte Messungen durchzuführen und Einflussfaktoren auf die CH4-Emissionen zu identifizieren. Weiterhin war der LMD in der Lage, tierindividuelle Unterschiede bzgl. der CH4-Konzentration in der Atemluft von Milchkühen zu messen. Die geschätzten Heritabilitäten der CH4-Merkmale lagen zwischen 0,05-0,27. Die Selektion von Kühen mit geringen CH4-Emissionen bei gleicher Milchleistung und Futteraufnahme ist damit möglich.
description: Methane (CH4) is a product of feed fermentation in ruminants. For dairy cows CH4 production represents a loss of gross energy. Moreover CH4 is a strong greenhouse gas which contributes to global warming. A possibility to reduce CH4 emissions is breeding for low emitting cows. The aim of this study was to examine whether the laser methane detector (LMD) is an appropriate method to measure the CH4 concentrations in the breath of many cows on farm. Furthermore a measurement protocol was developed and heritabilities for new CH4 phenotypes were estimated. It was possible to detect between cow variation in CH4 concentration with the LMD. Furthermore potential influencing factors of CH4 emissions were identified. The estimated heritabilities for the CH4 phenotypes were 0.05-0.27. Hence, selection for low emitting cows with stable milk yield and feed intake is possible.