cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Self-organizing magnetic beads for biomedical applications
Creators: name: Gusenbauer, Markus
name: Kovacs, Alexander
name: Reichel, Franz
name: Exl, Lukas
name: Bance, Simon
name: Ozelt, Harald
name: Schrefl, Thomas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In the field of biomedicine magnetic beads are used for drug delivery and to treat hyperthermia. Here we propose to use self-organized bead structures to isolate circulating tumor cells using lab-on-chip technologies. Typically blood flows past microposts functionalized with antibodies for circulating tumor cells. Creating these microposts with interacting magnetic beads makes it possible to tune the geometry in size, position and shape. We developed a simulation tool that combines micromagnetics and discrete particle dynamics, in order to design micropost arrays made of interacting beads. The simulation takes into account the viscous drag of the blood flow, magnetostatic interactions between the magnetic beads and gradient forces from external aligned magnets. We developed a particle-particle particle-mesh method for effective computation of the magnetic force and torque acting on the particles.
Finite element 3D modeling of mechanical behavior of mineralized collagen microfibrils
Creators: name: Barkaoui, Abdelwahed
name: Hambli, Ridha
Publisher: name: arXiv
Year: 2011
Subjects: subject: Medical Physics (physics.med-ph)
subject: Biological Physics (physics.bio-ph)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The aim of this work is to develop a 3D finite elements model to study the nanomechanical behaviour of mineralized collagen microfibrils, which consists of three phases, (i) collagen phase formed by five tropocollagen (TC) molecules linked together with cross links, (ii) a mineral phase (Hydroxyapatite) and (iii) impure mineral phase, and to investigate the important role of individual properties of every constituent. The mechanical and the geometrical properties (TC molecule diameter) of both tropocollagen and mineral were taken into consideration as well as cross-links, which was represented by spring elements with adjusted properties based on experimental data. In the present paper an equivalent homogenised model was developed to assess the whole microfibril mechanical properties (Young's modulus and Poisson's ratio) under varying mechanical properties of each phase. In this study both equivalent Young's modulus and Poisson's ratio which were expressed as functions of Young's modulus of each phase were obtained under tensile load with symmetric and periodic boundary conditions.
description: Journal of Applied Biomaterials and Biomechanics 9, 3 (2011) xxx
Lorentz meets Lipschitz
Creators: name: Lange, Christian
name: Lytchak, Alexander
name: Sämann, Clemens
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53B30, 34A36, 83C99

description: We show that maximal causal curves for a Lipschitz continuous Lorentzian metric admit a $\mathcal{C}^{1,1}$-parametrization and that they solve the geodesic equation in the sense of Filippov in this parametrization. Our proof shows that maximal causal curves are either everywhere lightlike or everywhere timelike. Furthermore, the proof demonstrates that maximal causal curves for an $α$-Hölder continuous Lorentzian metric admit a $\mathcal{C}^{1,\fracα{4}}$-parametrization.
description: 25 pages; v2: minor improvements of the presentation
Dust-acoustic waves and stability in the permeating dusty plasma: II. Power-law distributions
Creators: name: Gong, Jingyu
name: Liu, Zhipeng
name: Du, Jiulin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Geophysics (physics.geo-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The dust-acoustic waves and their stability driven by a flowing dusty plasma when it cross through a static (target) dusty plasma (the so-called permeating dusty plasma) are investigated when the components of the dusty plasma obey the power-law q-distributions in nonextensive statistics. The frequency, the growth rate and the stability condition of the dust-acoustic waves are derived under this physical situation, which express the effects of the nonextensivity as well as the flowing dusty plasma velocity on the dust-acoustic waves in this dusty plasma. The numerical results illustrate some new characteristics of the dust-acoustic waves, which are different from those in the permeating dusty plasma when the plasma components are the Maxwellian distribution. In addition, we show that the flowing dusty plasma velocity has a significant effect on the dust-acoustic waves in the permeating dusty plasma with the power-law q-distribution.
description: 20 pages, 10 figures, 41 references
MICHAEL MARK WOOLFSON - Bibliography from JOHN PHILIP GRIME 30 April 1935 — 19 April 2021 JOHN PHILIP GRIME 30 April 1935 — 19 April 2021 Elected FRS 1998
Creators: name: Pierce, Simon
name: Fridley, Jason D.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: John Philip ‘Phil’ Grime developed fundamental theory in plant ecology that emerged from a lifetime of fieldwork and experimental studies in the Sheffield region, South Yorkshire. His approach was an unusual combination of observation, experiment and theory: he conducted detailed, intensive observations of natural communities, alongside experimental manipulation of those communities and simulated ‘microcosms’ in the service of formulating general rules (‘strategies’) by which plants evolve with respect to their environment. In this way, Grime was one of several key figures that propelled plant ecology away from descriptive methods focusing on vegetation composition and toward a science more integrated with other fields, including evolutionary biology and Earth science. Grime's investigative approach was an inspiration for the modern field of global change biology, and, by focusing on understanding the contrasting roles species and their traits play in the functioning of ecosystems, marked the beginning of the field of plant functional ecology. For much of his career Grime held the post of full professor (and in retirement, emeritus professor of ecology) at the University of Sheffield, where he also served as the director of the Unit of Comparative Plant Ecology and of the Buxton Climate Change Impacts Laboratory. Awarded an honorary doctorate by Radboud University (Nijmegen) and a foreign member of the Royal Netherlands Academy of Arts and Sciences, Grime was the first person awarded the Alexander von Humboldt Award of the International Association for Vegetation Science.
Indoor navigation and location based services scenario for airports
Creators: name: Klimek, Helge Sören
name: Greßmann, Björn
name: Turau, Volker
Publisher: name: TUHH Universitätsbibliothek
Year: 2011
Subjects: subject: Indoor navigation
subject: location based service
subject: localization
subject: positioning
classificationCode: H.2.8
subject: Database Applications
classificationCode: H.5.4
subject: Hypertext/Hypermedia (I.7, J.7) (NEW)

description: This report explains in an in depth example how our architecture for indoor navigation and location based services (INLBS) works. The expandable architecture offers a framework API and predefined services with a runtime environment and aims at enabling ubiquitous INLBS where users can use their mobile devices in any building.
La ética del control de la contaminación ambiental automotriz en el Ecuador
Creators: name: Franco Intriago, Mario Efrén
name: Loor Moncayo, Sidney Alejandra
Publisher: name: figshare
Year: 2023
Subjects: Other economics not elsewhere classified

description: En un aspecto global se evidencia un incremento en la contaminación del medio ambiente, siendo una de las más destacables causas: los vehículos. Estos al ser uno de los medios de transportes más comunes por ser efectivos para la movilidad, a su vez, generan efectos negativos en el entorno mediante la liberación de distintas cantidades de dióxido de carbono y uso de los derivados del petróleo para su funcionamiento. El objetivo de esta investigación es determinar la ética en el control de la contaminación del parque automotor en el Ecuador. Aplicando una metodología cualitativa mediante la revisión bibliográfica de distintas fuentes. El resultado principal es que la contaminación vehicular está cada vez empeorando más al punto de poner en peligro al medio ambiente y a su vez al ser humano. Los entes reguladores de la contaminación deben poner más énfasis en cumplir con las disposiciones, normas o reglamentos que estén vigentes en el Ecuador. En conclusión, la contaminación sobre la industria automotriz es uno de los mayores problemas a nivel mundial por los diferentes factores que conlleva la creación y utilización de un vehículo, sin embargo, es un mal necesario en la vida cotidiana del ser humano que puede ser reemplazado por otras alternativas no tan dañinas. La ética ambiental hace hincapié en el cuidado del medio ambiente debido a que aparte del ser humano existen otros seres vivos habitando en el planeta tierra.
Multidimensional cultural perception and spatial differentiation in the Yellow River Basin
Creators: name: Qin, Jian
name: Han, Quan
name: Li, Xiaomeng
Publisher: name: Zenodo
Year: 2023
Subjects: cultural perception; semantic similarity networks; spatial difference; geographic partitioning model

description: In this study, we attempt to combine qualitative and quantitative methods to study the spatial differentiation of multi-dimensional cultural perception in the Yellow River Basin. Firstly, we refers to the theory of cultural perception and uses text analysis to refine and summarize the index system of tourists' multi-dimensional cultural perception of the Yellow River Basin. Then, the RoFormer deep neural network model was used to classify and identify the text data of tourists' travel notes in different cities by sentences according to the cultural perception dimension. On this basis, the cultural semantic similarity of each city was measured to build a network representing the perceived cultural similarity between cities. Finally, a geographic partitioning model oriented to semantic similarity networks was proposed and the Yellow River basin was divided into different regions according to the similarity of tourists' cultural perception, and the word segmentation method was used
Variable construction process to understand cyclists' route choice from GPS records of mobile applications
Creators: name: Ramírez-Leuro, Laura Daniela
name: Bulla-Cruz, Lenin Alexander
Publisher: name: Zenodo
Year: 2023
Subjects: sustainable mobility, geospatial analysis, variables per km of route

description: This document summarizes the process for the treatment of GPS records of mobile applications and builds variables to understand the route decisions of cyclists. Therefore, improve public policies of sustainable mobility from a geographical analysis of road safety, infrastructure, and public safety (thefts) parameterized by km of the route traveled, which are subsequently analyzed statistically. Finally, this case study is based on the GPS records of the Biko mobile application in Bogotá, Colombia. The process can be replicated in any city with the available information.
Pferdegestützte Therapie in der Psychomotorik: Unterstützung der sozio–emotionalen Entwicklung bei Kindern mit internalisierenden Verhaltensauffälligkeiten
Creators: name: Mächler, Sherine
Publisher: name: Zenodo
Year: 2023
Subjects: Psychomotorik
Psychomotoriktherapie
pferdegestützte Therapie
sozio-emotionale Entwicklung
Verhaltensauffälligkeit
Bachelorarbeit

description: Das Pferd besitzt, genauso wie wir Menschen, soziale und emotionale Grundbedürfnisse, wie Liebe, Geborgenheit und Sicherheit. Aus diesem Grund fällt es dem Menschen besonders leicht, eine Beziehung mit dem Pferd einzugehen (Bütow 2011, S.24). Die Beziehung zwischen Mensch und Pferd entsteht in erster Linie über körperlichen Kontakt, wodurch eine emotionale Verbindung hergestellt werden kann. Diese hat eine greifbare Auswirkung auf die Motorik und das sozio-emotionale Verhalten des Menschen. In der Literatur über Pferdetherapie wird mehrheitlich der positive Effekt auf Kinder mit externalisierenden Verhaltensauffälligkeiten, Traumata oder Depression aufgezeigt. Über den Einfluss der Arbeit mit Pferden auf Kinder mit internalisierenden Verhaltensauffälligkeiten wird wenig berichtet.
 In dieser Arbeit geht es darum Eignung und Möglichkeiten des Pferdes als Hilfsmittel für den Aufbau der Beziehung zwischen Therapeut:in und dem Kind in der Psychomotorik und dessen positiven Effekt auf das internalisierende Sozialverhalten des Kindes aufzuzeigen. Dafür wurden mittels Literaturrecherchen Zusammenhänge zwischen Pferdetherapie, Psychomotorik und internalisierenden Verhaltensauffälligkeiten untersucht. In einem weiteren Schritt wurden diese mit Hilfe der Beobachtung einer Reittherapie sowie einem Experteninterview verglichen.
 Daraus resultierten die Erkenntnisse, dass die pferdegestützte Psychomotoriktherapie einen positiven Einfluss auf den Beziehungsaufbau zwischen Kind und Therapeut:in sowie auf das allgemeine Beziehungsverhalten der Kinder haben kann. Zudem beeinflusst der Umgang des Pferdes das Selbstkonzept des Kindes positiv und nachhaltig. Diese Ergebnisse könnten als nächstes durch eine effektive Pferdegestützte Psychomotoriktherapie überprüft werden.
Measuring Microlensing using Spectra of Multiply Lensed Quasars
Creators: name: Motta, V.
name: Mediavilla, E.
name: Falco, E.
name: Munoz, J. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report on a program of spectroscopic observations of gravitationally-lensed QSOs with multiple images. We seek to establish whether microlensing is occurring in each QSO image using only single-epoch observations. We calculate flux ratios for the cores of emission lines in image pairs to set a baseline for no microlensing. The offset of the continuum flux ratios relative to this baseline yields the microlensing magnification free from extinction, as extinction affects the continuum and the lines equally. When we find chromatic microlensing, we attempt to constrain the size of the QSO accretion disk. SDSSJ1004+4112 and HE1104-1805 show chromatic microlensing with amplitudes $0.2< |Δm| < 0.6$ and $0.2< |Δm| < 0.4$ mag, respectively. Modeling the accretion disk with a Gaussian source ($I\propto \exp(-R^2/2r_s^2)$) of size $r_s\propto λ^p$ and using magnification maps to simulate microlensing we find $r_s(λ3363)=7\pm3 light-days (18.1\pm7.8 \times 10^{15} cm$) and $p=1.1\pm 0.4$ for SDSS1004+4112, and $r_s(λ3363)=6\pm2 light-days (15.5\pm5.2 \times 10^{15} cm$) and $p=0.7\pm0.1$ for HE1104-1805. For SDSSJ1029+2623 we find strong chromaticity of $\sim 0.4$ mag in the continuum flux ratio, which probably arises from microlensing although not all the available data fit within this explanation. For Q0957+561 we measure B-A magnitude differences of 0.4 mag, much greater than the $\sim$0.05 mag amplitude usually inferred from lightcurve variability. It may substantially modify the current interpretations of microlensing in this system, likely favoring the hypothesis of smaller sources and/or larger microdeflectors. For HS0818+1227, our data yield posible evidence of microlensing.
description: 45pp, 17figs, ApJ accepted (june 4th 2012)
Using secondary data to examine whether a programme of interventions in urban forests enhances community health and wellbeing
Creators: name: Ogletree, S
name: Ward Thompson, C
name: Clemens, T
name: Pearce, J
name: Mitchell, R
Publisher: name: Zenodo
Year: 2023
Subjects: Greenspace, Secondary data, Woodlands, Mental health

description: There is a growing demand for better evidence on the importance of forests for human health, as this may be a key element of future forestry strategies. Combining data from the Scottish Census, Public Health Scotland, and Scottish Forestry this research sought to address specific questions about the impact of urban woodlands in deprived areas on mental health and child development. Spatial data on woodland interventions and residential location allowed for a unique level of analysis to investigate outcomes.
Astrorhizida Lankester 1885
Creators: name: Maldonado, Manuel
name: López-Acosta, María
name: Sitjà, Cèlia
name: Aguilar, Ricardo
name: García, Silvia
name: Vacelet, Jean
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Chromista
Foraminifera
Monothalamea
Astrorhizida

description: Order Astrorhizida Lankester, 1885
description: Published as part of Maldonado, Manuel, López-Acosta, María, Sitjà, Cèlia, Aguilar, Ricardo, García, Silvia & Vacelet, Jean, 2013, A giant foraminifer that converges to the feeding strategy of carnivorous sponges: Spiculosiphon oceana sp. nov. (Foraminifera, Astrorhizida), pp. 571-584 in Zootaxa 3669 (4) on page 572, DOI: 10.11646/zootaxa.3669.4.9, http://zenodo.org/record/221875
The Potential of Social Media Analysis for Tourism in Indonesia
Creators: name: Hanifah, Raidah
name: Comber, Alexis
name: Malleson, Nicholas
name: Houlden, Victoria
Publisher: name: Zenodo
Year: 2023
Subjects: Social Media, UGC, Tourism, Indonesia

description: Nowadays, social media are recognised as a media for information aggregation rather than just a sociability and gathering platform. Because of the exponential growth of social media usage, there has been an explosion of social media data produced by its users as UGC (User Generated Content), which can be stored in a variety of formats, including textual data, images, videos, audio, and geolocations. This potential can be used to explain various phenomena and solve problems in the tourism sector. This study will examine the use of social media data to gain a better understanding of Indonesian tourism.
A review of Monte Carlo simulations of polymers with PERM
Creators: name: Hsu, Hsiao-Ping
name: Grassberger, Peter
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In this review, we describe applications of the pruned-enriched Rosenbluth method (PERM), a sequential Monte Carlo algorithm with resampling, to various problems in polymer physics. PERM produces samples according to any given prescribed weight distribution, by growing configurations step by step with controlled bias, and correcting "bad" configurations by "population control". The latter is implemented, in contrast to other population based algorithms like e.g. genetic algorithms, by depth-first recursion which avoids storing all members of the population at the same time in computer memory. The problems we discuss all concern single polymers (with one exception), but under various conditions: Homopolymers in good solvents and at the $Θ$ point, semi-stiff polymers, polymers in confining geometries, stretched polymers undergoing a forced globule-linear transition, star polymers, bottle brushes, lattice animals as a model for randomly branched polymers, DNA melting, and finally -- as the only system at low temperatures, lattice heteropolymers as simple models for protein folding. PERM is for some of these problems the method of choice, but it can also fail. We discuss how to recognize when a result is reliable, and we discuss also some types of bias that can be crucial in guiding the growth into the right directions.
description: 29 pages, 26 figures, to be published in J. Stat. Phys. (2011)
Bolt Load Retention Response and Creep of AS41 Mg-Alloy
Creators: name: Anopuo, Okechukwu
Publisher: name: TUHH Universitätsbibliothek
Year: 2010
Subjects: subject: Kriechen
subject: Magnesiumlegierung
subject: creep
subject: bolt load retention
classificationCode: 51.30
subject: Werkstoffprüfung, Werkstoffuntersuchung
subject: Kriechen
subject: Magnesiumlegierung

description: In dieser Studie wird das Kriech- und das "Bolt-Load Retention"-Verhalten der kokillengegossenen Magnesiumlegierung AS41 untersucht. Es konnte gezeigt werden, dass der Abfall der Druckspannung unter der Verschraubung auf Kriechvorgange der Legierung AS41 zurückzuführen sind. Die Kriechmechanismen bei der Magnesiumlegierung AS41 sind Korngrenzengleiten und Versetzungsklettern abhängig vom Spannungszustand und der Temperatur, der der Werkstoff ausgesetzt ist. Porenbildung in der Umgebung von abgetrennten Mischkristallbereichen beeinflusst das Kriechverhalten. Das "Bolt-Load Retention"-Verhalten der Magnesiumlegierung AS41 konnte unter Verwendung von "Compliance-Creep"- Beziehungen und Finite-Elemente-Analysen erfolgreich modelliert werden.
description: This work studies the creep and bolt load retention (BLR) response of permanent mould AS41 Mg-alloy. Results show that fastener clamp load loss of AS41 is due to creep of the alloy at bolted joint during service. Creep of AS41 Mg-alloy is dominated by grain boundary sliding and dislocation climb depending on the stress and temperature under consideration. Pore development around solute segregated regions was found to influence creep deformation. BLR of AS41 was successfully modelled using compliance-creep relationship and FEA approach.
The relation between surface star formation rate density and spiral arms in NGC 5236 (M83)
Creators: name: Silva-Villa, Esteban
name: Larsen, Soeren
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: For a long time the consensus has been that star formation rates are higher in the interior of spiral arms in galaxies, compared to inter-arm regions. However, recent studies have found that the star formation inside the arms is not more efficient than elsewhere in the galaxy. Previous studies have based their conclusion mainly on integrated light. We use resolved stellar populations to investigate the star formation rates throughout the nearby spiral galaxy NGC 5236. We aim to investigate how the star formation rate varies in the spiral arms compared to the inter-arm regions, using optical space-based observations of NGC 5236. Using ground-based Hαimages we traced regions of recent star formation, and reconstructed the arms of the galaxy. Using HST/ACS images we estimate star formation histories by means of the synthetic CMD method. Arms based on Hαimages showed to follow the regions where stellar crowding is higher. Star formation rates for individual arms over the fields covered were estimated between 10 to 100 Myr, where the stellar photometry is less affected by incompleteness. Comparison between arms and inter-arm surface star formation rate densities (Σ$_{SFR}$) suggested higher values in the arms (\sim0.6 dex). Over a small fraction of one arm we checked how the Σ$_{SFR}$ changes for the trailing and leading part. The leading part of the arm showed to have a higher Σ$_{SFR}$ in the age range 10-100 Myr. Predictions from the density wave theory of a rapid increase in the star formation at the edge where the stars and the gas enter the density wave are confirmed. The Σ$_{SFR}$ presents a steep decrease with distance from the center of the arms through the inter-arm regions.
description: 10 pages, 11 figures. Accepted for publication in Astronomy and Astrophysics
Differential interferometry of close binary of supermassive black holes in an elliptical configuration
Creators: name: Kovacevic, Andjelka
name: Songsheng, Yu-Yang
name: Wang, Jian-Min
name: Popovic, Luka C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Very Large Telescope Interferometer (VLTI), and the Extremely Large Telescope (ELT) will be a robust astrophysics suite offering the opportunity of probing the structure and dynamics of CB-SMBH at high spectral and angular resolution. Here, we explore and illustrate the application of differential interferometry on unresolved the CB-SMBH systems in elliptical orbital configurations and a single SMBH with clouds in elliptical orbital motion. Photocenter displacements between each SMBH and regions in their disc-like broad line regions (BLR) appear as small interferometric differential phase variability. To investigate the application of interferometric phases for the detection of CB-SMBH systems, we simulate a series of differential interferometry signatures, based on our model comprising ensembles of clouds surrounding each of supermassive black hole in a CB-SMBH. Setting model to the parameters of a single SMBH with elliptical cloud motion, we also calculated a series of differential interferometry observables for this case. We found various deviations from the canonical S-shaped of CB-SMBH phases profile for elliptically configured CB-SMBH systems. The amplitude and specific shape of the interferometry observables depend on orbital configurations of the CB-SMBH system. We get distinctive results when considering antialigned angular momenta of cloud orbits regarding total CB-SMBH angular momentum. Some simulated spectral lines from our model closely resemble observations of Pa αline got from near-infrared AGN surveys. We found differences between differential phases zoo of a single SMBH and CB-SMBH systems. The differential phases zoo for a single SMBH comprises deformed S shape. We also showed how their differential phase shape, amplitude, and slope evolve with various sets of cloud orbital parameters and observer position.
description: accepted by A&A Journal
title: I cuori dimenticati dei luoghi. Appunti su trascendenza, comunità e recupero del territorio
Creators: name: Sammassimo, Anna
Publisher: name: Italian Society for Law and Literature (ISLL)
Year: 2025

description: [Places’ forgotten hearts. Notes on transcendence, community and land recovery] Religious heritage is central to Italy’s urban and cultural landscape. Despite the historical value, more and more churches and monasteries are losing their original purpose because of secularisation and social demographic changes. Many religious sites end up underused, vacant, or even demolished. Out of all historic buildings, adaptive reuse of the religious heritage sites is particularly valued as a significant community amenity. When churches are no longer used as a place of worship, the buildings are often redeveloped into homes, cultural centers, hotels, or libraries, as it comes in Pirandello’s novel Il fu Mattia Pascal.
Presença da obra de José Saramago no Brasil: a chegada
Creators: name: De Oliveira Neto, Pedro Fernandes
Publisher: name: Confluenze.  Rivista di Studi Iberoamericani
Year: 2023

description: A história sobre a presença da obra de José Saramago no Brasil ainda espera ser escrita. O que se apresenta neste artigo é algum contributo nesse sentido. Trata-se de uma peça de sociologia dos hábitos literários, dado o interesse de descrição sócio-histórica sobre a consolidação de uma obra literária na economia simbólica de um país. O recorte temporal designado como chegada cobre dos finais da década de 1970 e meados de 1988, priorizando como fonte dois jornais impressos de São Paulo e Rio de Janeiro. Trata-se, portanto, de uma maneira de iniciar a contar uma história à espera de ser contada.
description: Confluenze. Rivista di Studi Iberoamericani, Vol. 15 No. 1 (2023): Saramago: universal writer? 25 Years of José Saramago’s Nobel Prize in Literature
Solving non-linear Kolmogorov equations in large dimensions by using deep learning: a numerical comparison of discretization schemes
Creators: name: Macris, Nicolas
name: Marino, Raffaele
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Machine Learning (cs.LG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Non-linear partial differential Kolmogorov equations are successfully used to describe a wide range of time dependent phenomena, in natural sciences, engineering or even finance. For example, in physical systems, the Allen-Cahn equation describes pattern formation associated to phase transitions. In finance, instead, the Black-Scholes equation describes the evolution of the price of derivative investment instruments. Such modern applications often require to solve these equations in high-dimensional regimes in which classical approaches are ineffective. Recently, an interesting new approach based on deep learning has been introduced by E, Han, and Jentzen [1][2]. The main idea is to construct a deep network which is trained from the samples of discrete stochastic differential equations underlying Kolmogorov's equation. The network is able to approximate, numerically at least, the solutions of the Kolmogorov equation with polynomial complexity in whole spatial domains. In this contribution we study variants of the deep networks by using different discretizations schemes of the stochastic differential equation. We compare the performance of the associated networks, on benchmarked examples, and show that, for some discretization schemes, improvements in the accuracy are possible without affecting the observed computational complexity.
Fredholm Theory with Applications to Random Operators
Creators: name: Hagger, Raffael
Publisher: name: TUHH Universitätsbibliothek
Year: 2016
Subjects: subject: Random Operators
subject: Fredholm Theory
subject: Limit Operators
subject: Spectral Theory
subject: Numerical Ranges
classificationCode: 510
subject: Mathematik

description: Diese Arbeit befasst sich mit der Fredholmtheorie von beschränkten linearen Operatoren auf banachraumwertigen Folgenräumen. Im Speziellen werden zufällige Operatoren auf ebendiesen Räumen betrachtet. Eines der wichtigsten Hilfsmittel zur Untersuchung von Operatoren auf Folgenräumen ist der Begriff des Grenzoperators. Die Beziehung zwischen einem Operator und seinen Grenzoperatoren wird im Bezug auf Eigenschaften wie Spektrum, Pseudospektrum und numerischer Wertebereich untersucht. Es stellt sich heraus, dass sich für alle diese Eigenschaften jeweils ähnliche Sätze formulieren lassen. Diese Erkenntnisse erweisen sich als besonders nützlich bei der Untersuchung zufälliger Operatoren. Ein besonderes Augenmerk liegt dabei auf der sogenannten Feinberg-Zee Random Hopping Matrix, welche trotz ihrer einfachen Gestalt ein sehr komplexes Spektrum zu haben scheint. Mit der Hilfe neuer Methoden können verbesserte obere und untere Schranken an jenes Spektrum angegeben werden. Eine dieser unteren Schranken ist eine unendliche Folge von Julia-Mengen. Dies unterstreicht die Komplexität des Spektrums jenes Operators.
description: This thesis is concerned with the Fredholm theory of bounded linear operators acting on Banach space valued sequence spaces. As an application, random operators are considered and studied in detail. One of the most important tools in the study of operators on sequence spaces is the concept of limit operators. The correspondence between an operator and its limit operators is studied regarding properties like spectrum, pseudospectrum and numerical range. It turns out that similar theorems can be formulated for all these properties, respectively. These results prove to be particularly useful in the case of random operators. Special attention is directed to the so-called Feinberg-Zee random hopping matrix, which, despite its simple appearance, seems to have a very complicated spectrum. With the help of new methods, improved upper and lower bounds to the spectrum are obtained. One of these lower bounds is an infinite sequence of Julia sets, which emphasizes the complexity of the spectrum of this particular operator.
Testing the global star formation relation: An HCO+ (3-2) mapping study of Red MSX sources in the Bolocam Galactic Plane Survey
Creators: name: Schenck, David E.
name: Shirley, Yancy L.
name: Reiter, Megan
name: Juneau, Stephanie
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an analysis of the relation between the star formation rate (SFR) and mass of dense gas in Galactic clumps and nearby galaxies. Using the bolometric luminosity as a measure of SFR and the molecular line luminosity of HCO+ (3-2) as a measure of dense gas mass, we find that the relation between SFR and M_{dense} is approximately linear. This is similar to published results derived using HCN (1-0) as a dense gas tracer. HCO+ (3-2) and HCN (1-0) have similar conditions for excitation. Our work includes 16 Galactic clumps that are in both the Bolocam Galactic Plane Survey and the Red MSX Survey, 27 water maser sources from the literature, and the aforementioned HCN (1-0) data. Our results agree qualitatively with predictions of recent theoretical models which state that the nature of the relation should depend on how the critical density of the tracer compares with the mean density of the gas.
description: 38 pages (with full table), 3 figures
Decomposition theorems for involutive solutions to the Yang-Baxter equation
Creators: name: Ramírez, S.
name: Vendramin, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Group Theory (math.GR)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 16T25

description: Motivated by the proof of Rump of a conjecture of Gateva-Ivanova on the decomposability of square-free solutions to the Yang-Baxter equation, we present several other decomposability theorems based on the cycle structure of a certain permutation associated with the solution.
description: 10 pages. Accepted for publication in Int. Math. Res. Not. IMRN
Berry Curvature of the Dirac Particle in $α$-(BEDT-TTF)$_2$I$_3$
Creators: name: Suzumura, Yoshikazu
name: Kobayashi, Akito
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We examine several properties of the Berry curvature for the organic conductor $α$-(BEDT-TTF)$_2$I$_3$ consisting of four bands, which exhibits a zero-gap state with Dirac cones. By adding a small potential acting on two molecular sites, which breaks the inversion symmetry, it is shown that the curvature for the Dirac particles displays a pair of peaks with opposite signs and that each peak increases with decreasing potential. The Berry curvature originating from the property of the wave function is analyzed using a reduced Hamiltonian with a 2x2 matrix based on the Luttinger-Kohn representation, which describes a pair of Dirac particles between the conduction band and the valence band. Two types of velocity fields in the reduced Hamiltonian, whose vector product gives the Berry curvature, rotate around the Dirac point as a vortex. It is also shown that the other bands exhibit another pair of peaks of Dirac particles with a tendency toward merging.
description: 18 pages, 12 figures
Simultaneous inference of periods and period-luminosity relations for Mira variable stars
Creators: name: He, Shiyuan
name: Lin, Zhenfeng
name: Yuan, Wenlong
name: Macri, Lucas M.
name: Huang, Jianhua Z.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The Period--Luminosity relation (PLR) of Mira variable stars is an important tool to determine astronomical distances. The common approach of estimating the PLR is a two-step procedure that first estimates the Mira periods and then runs a linear regression of magnitude on log period. When the light curves are sparse and noisy, the accuracy of period estimation decreases and can suffer from aliasing effects. Some methods improve accuracy by incorporating complex model structures at the expense of significant computational costs. Another drawback of existing methods is that they only provide point estimation without proper estimation of uncertainty. To overcome these challenges, we develop a hierarchical Bayesian model that simultaneously models the quasi-periodic variations for a collection of Mira light curves while estimating their common PLR. By borrowing strengths through the PLR, our method automatically reduces the aliasing effect, improves the accuracy of period estimation, and is capable of characterizing the estimation uncertainty. We develop a scalable stochastic variational inference algorithm for computation that can effectively deal with the multimodal posterior of period. The effectiveness of the proposed method is demonstrated through simulations, and an application to observations of Miras in the Local Group galaxy M33. Without using ad-hoc period correction tricks, our method achieves a distance estimate of M33 that is consistent with published work. Our method also shows superior robustness to downsampling of the light curves.
Phonon spectrum, thermal expansion and heat capacity of UO$_2$ from first-principles
Creators: name: Yun, Younsuk
name: Legut, Dominik
name: Oppeneer, Peter M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report first-principles calculations of the phonon dispersion spectrum, thermal expansion, and heat capacity of uranium dioxide. The so-called direct method, based on the quasiharmonic approximation, is used to calculate the phonon frequencies within a density functional framework for the electronic structure. The phonon dispersions calculated at the theoretical equilibrium volume agree well with experimental dispersions. The computed phonon density of states (DOS) compare reasonably well with measurement data, as do also the calculated frequencies of the Raman and infrared active modes including the LO/TO splitting. To study the pressure dependence of the phonon frequencies we calculate phonon dispersions for several lattice constants. Our computed phonon spectra demonstrate the opening of a gap between the optical and acoustic modes induced by pressure. Taking into account the phonon contribution to the total free energy of UO$_2$ its thermal expansion coefficient and heat capacity have been {\it ab initio} computed. Both quantities are in good agreement with available experimental data for temperatures up to about 500 K.
description: 7 pages, 4 figures
A Polarization Modulator Unit for the Mid- and High-Frequency Telescopes of the LiteBIRD mission
Creators: name: Columbro, Fabio
name: de Bernardis, Paolo
name: Lamagna, Luca
name: Masi, Silvia
name: Paiella, Alessandro
name: Piacentini, Francesco
name: Pisano, Giampaolo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The LiteBIRD mission is a JAXA strategic L-class mission for all sky CMB surveys which will be launched in the 2020s. The main target of the mission is the detection of primordial gravitational waves with a sensitivity ofthe tensor-to-scalar ratio δr <0.001. The polarization modulator unit (PMU) represents a critical and powerful component to suppress 1/f noise contribution and mitigate systematic uncertainties induced by detector gain drift, both for the high-frequency telescope (HFT) and for the mid-frequency telescope (MFT). Each PMUs based on a continuously-rotating transmissive half-wave plate (HWP) held by a superconducting magnetic bearing in a 5K environment. In this proceeding we will present the design and expected performance of the LiteBIRD PMUs and testing performed on every PMU subsystem with a room-temperature rotating disk used as a stand-in for the cryogenic HWP rotor.
description: 16 pages, 6 figures, SPIE Proceeding no. 11443-282
title: Extraction and Fractionation of Natural Organic Compounds from Plant Materials with Supercritical Carbon Dioxide
title: Extraktion und Fraktionierung organischer pflanzlicher Naturstoffe mit überkritischem Kohlendioxid
titleType: AlternativeTitle
Creators: name: Danielski, Leandro
Publisher: name: TUHH Universitätsbibliothek
Year: 2007
Subjects: subject: supercritical extraction
subject: carbon dioxide
subject: fractionation
subject: natural product
subject: plant
classificationCode: 58.13
subject: Thermische Verfahrenstechnik
subject: Destraktion
subject: Kohlendioxid
subject: Fraktionierung
subject: Naturstoff
subject: Pflanzenstoff

description: Das Ziel dieser Arbeit war die Untersuchung und Modellierung von Mehrstoffgemischen unter überkritischen Bedingungen. Die Extraktion und Fraktionierung von organischen Stoffen aus Reisöl und Mandarinenschalenöl mittels überkritischen Kohlendioxids wurden untersucht. Feststoff- und Gegenstromextraktionen wurden von 7.5 bis 40 MPa und von 35 bis 70 °C durchgeführt. Die erhaltenen Ergebnisse haben bestätigt, dass die überkritische Technologie als ein alternatives Verfahren für die selektive Fraktionierung reiner Naturstoffe genutzt werden kann.
description: The aim of the present work was the measurement and modeling of multicomponent mixtures under supercritical conditions. The extraction and fractionation of natural organic components from rice bran and mandarin peel oils using supercritical carbon dioxide as solvent were investigated. Solid extractions and countercurrent experiments were performed from 7.5 to 40 MPa and from 35 to 70 °C. The results obtained have shown that supercritical technology can be chosen as an alternative process for the selective fractionation of high purity components from plant materials.
Anomalous symmetry breaking in Weyl semimetal CeAlGe
Creators: name: Hodovanets, H.
name: Eckberg, C. J.
name: Eo, Y.
name: Campbell, D. J.
name: Zavalij, P. Y.
name: Piccoli, P.
name: Metz, T.
name: Kim, H.
name: Higgins, J. S.
name: Paglione, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: CeAlGe, a proposed type-II Weyl semimetal, orders antiferromagnetically below 5 K. At 2 K, spin-flop and a spin-flip transitions to less than 1 $μ_B$/Ce are observed in the $M(H)$ data below 30 kOe, ($\bf{H}\|\bf{a}$ and $\bf{b}$, and 4.3 kOe, $\bf{H}\|\langle110\rangle$, respectively, indicating a four-fold symmetry of the $M(H)$ data along the principal directions in the tetragonal $\it{ab}$ plane with $\langle110\rangle$ set of easy directions. However, anomalously robust and complex twofold symmetry is observed in the angular dependence of resistivity and magnetic torque data in the magnetically ordered state once the field is swept in the $\it{ab}$ plane. This twofold symmetry is independent of temperature and field hystereses and suggests a magnetic phase transition that separates two different magnetic structures in the $\it{ab}$ plane. The boundary of this magnetic phase transition and possibly the type of low-field magnetic structure can be tuned by an Al deficiency.
title: A flexible wing modeling and physical mass estimation system for early aircraft design stages
title: Ein flexibles System zur Flügelmodlierung und Flügelmassenabschätzung in frühen Entwurfsphasen des Flugzeugentwurfs
titleType: AlternativeTitle
Creators: name: Dorbath, Felix
Publisher: name: TUHH Universitätsbibliothek
Year: 2014
Subjects: subject: Flügelmassenabschätzung
subject: Klappen
subject: Flap Tracks
subject: Finite Elemente Methode
subject: Flugzeugvorentwurf
subject: Wing mass estimation
subject: flaps
subject: flap tracks
subject: finite element method
subject: preliminary aircraft design
classificationCode: 670
subject: Industrielle Fertigung
classificationCode: 670
subject: Manufacturing
subject: Luftfahrzeug
subject: Konstruktion
subject: Flugzeug

description: Es wurde eine multidisziplinäre Toolkette für die Flügelmassenabschätzung in frühen Entwurfsphasen entwickelt. Neben der Flügelprimärstruktur enthält das FE Model die Klappen inklusive Klappenführungsmechanismen, die Querruder, das Fahrwerk und den Triebwerkspylon. The Toolkette enthält Module für die Strukturanalyse und -dimensionierung, sowie die Abschätzung der Aerodynamik-, Treibstoff-, Fahrwerks- und Triebwerkslasten. Die Toolkette wurde anhand zweier Referenzflugzeuge kalibriert. Die Kalibrierung zeigt die hohe Genauigkeit des gewählten Ansatzes.
description: A multidisciplinary tool chain for wing mass estimation for early design stages is presented. Beside the wing primary structure, the structural FE model includes flaps and tracks, ailerons, landing gears and engine pylons. The chain includes the structural analysis and sizing capability and models for aerodynamic, fuel, landing gear and engine loads. The chain is calibrated against two reference aircraft. The calibration shows the high accuracy of the extended physical modeling.
Proposal to improve Ni-based superconductors via enhanced charge transfer
Creators: name: Lang, Zi-Jian
name: Jiang, Ruoshi
name: Ku, Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Recently discovered superconductivity in hole-doped nickelate Nd$_{0.8}$Sr$_{0.2}$NiO$_2$ has attracted intensive attention in the field. An immediate question is how to improve its superconducting properties. Guided by the key characteristics of electronic structures of the cuprates and the nickelates, we propose that nickel chalcogenides with a similar lattice structure should be a promising family of materials. Using NdNiS$_2$ as an example, through first-principle structural optimization and phonon calculation, we find this particular crystal structure a stable one. We justify our proposal by comparing with CaCuO$_2$ and NdNiO$_2$ with regard to strength of the charge-transfer characteristics and the trend in their low-energy many-body effective Hamiltonians of doped hole carriers. This analysis indicates that nickel chalcogenides host low-energy physics closer to that of the cuprates, with stronger magnetic interaction than the nickelates, and thus they deserve further experimental exploration. Our proposal also opens up the possibility of a wide range of parameter tuning through ligand substitution among chalcogenides, to further improve superconducting properties.
description: 3 pages + 2 pages supplemental material
Loschmidt Echo of Far-From-Equilibrium Fermionic Superfluids
Creators: name: Rylands, Colin
name: Yuzbashyan, Emil A.
name: Gurarie, Victor
name: Zabalo, Aidan
name: Galitski, Victor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Non-analyticities in the logarithm of the Loschmidt echo, known as dynamical quantum phase transitions [DQPTs], are a recently introduced attempt to classify the myriad of possible phenomena which can occur in far from equilibrium closed quantum systems. In this work, we analytically investigate the Loschmidt echo in nonequilibrium $s$-wave and topological $p_x+ip_y$ fermionic superfluids. We find that the presence of non-analyticities in the echo is not invariant under global rotations of the superfluid phase. We remedy this deficiency by introducing a more general notion of a grand canonical Loschmidt echo. Overall, our study shows that DQPTs are not a good indicator for the long time dynamics of an interacting system. In particular, there are no DQPTs to tell apart distinct dynamical phases of quenched BCS superconductors. Nevertheless, they can signal a quench induced change in the topology and also keep track of solitons emerging from unstable stationary states of a BCS superconductor.
description: 24 pages, 12 figures