cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
2018 Citrus leprosis a unique multietiologic disease.pdf
Creators: name: Ramos-Gonzalez, Pedro Luis
name: Chabi-Jesus, Camila
name: Arena, Gabriella D.
name: Tassi, Aline Danielle
name: Kitajima, Elliot Watanabe
name: Freitas-Astúa, Juliana
Publisher: name: figshare
Year: 2021
Subjects: subject: 60704 Plant Pathology
subject: FOS: Biological sciences
subject: 60506 Virology

description: Citrus leprosis (CL) is a viral disease currently affecting citrus orchards in Latin America. It causes a non-systemic infection that produces necrotic and chlorotic spots in leaves, stems and fruits, reducing citrus crop yield and leading to the death of younger trees. Viruses causing CL are assigned to two genera: Cilevirus [bipartite ss(+) RNA] and Dichorhavirus [bipartite ss(-) RNA]. Prevalent CL in orchards from Mexico to Argentina is the cytoplasmic type of the disease (CL-C) produced by the cilevirus citrus leprosis virus C (CiLV-C). CiLV-C population is genetically subdivided into two clades, which have a contrasted geographic distribution. While viruses from one clade seem to be confined to commercial areas in the State of São Paulo, Brazil, those from the other occur all over the continent. In Colombia, CL-C is also caused by another cilevirus, CiLV-C2, whose genome shares only 55% nucleotide identity with CiLV-C. Nuclear types of leprosis (CL-N), caused by dichorhaviruses, seem to have severely affected citrus orchards in Florida, USA, a century ago, and have been recently characterized in Brazil, Mexico and Colombia. While in the two latter countries citrus strains of orchid fleck virus (OFV-citrus) occur in commercial orchards, in Brazil, citrus leprosis virus N (CiLV-N) and citrus chlorotic spot virus (CiCSV) are the causal agents for CL-N so far, which are restricted to small non-commercial areas. Both, CiLV-N and CiCSV, display a relatively distant phylogenetic relationship with OFV (< 65% nucleotide sequence identity). All viruses causing CL are persistently transmitted by false spider mites of the genus Brevipalpus, but with distinguishing features for cilevirus and dichorhavirus. A large spectrum of citrus commercial species and hybrids are prone to CL infection, and the apparent symptoms, at least in sweet oranges infected by CiLV-C, seem to be the outcome of a hypersensitive-like response. Studies based on molecular epidemiology and omics approaches are providing the necessary insights to generate more effective and safer control strategies of CL.
Transformations from stripy states to skyrmion crystals
Creators: name: Wang, X. R.
name: Hu, X. C.
name: Sun, Z. Z.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Stripy states, consisting of a collection of stripy spin textures, are the precursors of skyrmion crystals (SkXs). Common belief is that stripy states and SkXs are topologically unconnected, and transitions between SkXs and stripy states are phase transitions. Here, we show that both stripy states and SkXs are skyrmion condensates and they are topologically equivalent. By gradually tuning the stripe whose width goes from smaller than to larger than skyrmion-skyrmion separation, the structure of a skyrmion condensate transforms smoothly and continuously from various stripy phases, including helical states and mazes, to crystals, showing that stripy states are topologically connected to SkXs.
description: 7 pages and 4 figures
"I maschi hanno il cervello più buono": come l'educazione al genere può avere un impatto sul pensiero critico dei bambini e delle bambine alla scuola dell'infanzia
Creators: name: Macagnino, Asia
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2024
Subjects: Stereotipi – parità di genere – scuola dell’infanzia – gioco simbolico – educazione al genere

description: Questa tesi ha come oggetto di ricerca delle modalità per avvicinarsi ad un cambiamento nell’ambito dell’educazione al genere attraverso piccoli momenti e attività nella scuola dell’infanzia. La mia ricerca approfondisce principalmente il gioco simbolico (la sua importanza e la sua relazione con gli stereotipi di genere) e ruota intorno ai seguenti interrogativi di ricerca “In che modo gli stereotipi di genere influiscono sui bambini e sulle bambine nel gioco simbolico alla scuola dell’infanzia?” e “Quale impatto può avere il gioco simbolico alla scuola dell’infanzia rispetto agli stereotipi di genere?”. Il percorso pedagogico e didattico è stato svolto arricchendo con i travestimenti l’angolo di gioco della casina, proponendo attività di rappresentazione grafica e proponendo varie discussioni e conversazioni rispetto ad alcuni argomenti, come ad esempio i mestieri e le cose ritenute socialmente per maschi o per femmine. Gli interventi sembrano aver dato ai bambini ed alle bambine la possibilità di sviluppare il loro senso critico rispetto all’argomento e a crearsi una propria opinione a riguardo. Nel poco tempo a disposizione si sono potuti notare dei cambiamenti in alcune idee espresse dal gruppo classe: questi risultati confermano l’importanza di affrontare questa tematica fin dalla scuola dell’infanzia. Relatrice: Katja Vanini De Carlo.
Electronic properties of edge-functionalized zigzag graphene nanoribbons on SiO2 substrate
Creators: name: Zhang, D. M.
name: Li, Z.
name: Zhong, J. F.
name: Miao, L.
name: Jiang, J. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Based on first-principles calculations, electronic properties of edge-functionalized zigzag graphene nanoribbons (ZGNRs) on SiO2 substrate are presented. Metallic or semiconducting properties of ZGNRs are revealed due to various interactions between edge-hydrogenated ZGNRs and different SiO2 (0001) surfaces. Bivalent functional groups decorating ZGNRs serve as the bridge between active edges of ZGNRs and SiO2. These functional groups stabilize ZGNRs on substrate, as well as modify the edge states of ZGNRs and further affect their electronic properties. Band gaps are opened owing to edge states destruction and distorted lattice in ZGNRs.
description: 10 pages, 5 figures
Mingel i paus online
Creators: name: Olsson, Ulf
Publisher: name: Stockholm University Design Patterns
Year: 2021
Subjects: subject: 130103 Higher Education
subject: FOS: Educational sciences

description: Det här är ett designmönster som skapats i ett utvecklingsprojekt på Centrum för universitetslärarutbildning vid Stockholms universitet. Projektet syftar till att utveckla pedagogiska praktiker för universitetslärare som arbetar med lärplattformar för att planera och organisera sin undervisning. Designmönster är en etablerad metod för att kartlägga bl.a. pedagogiska problem och erbjuda förslag till lösningar. Det här designmönstret är ett förslag hur en lärare kan arbeta med kursdesign, framförallt i den lärplattform som Stockholms universitet, kallad "Athena".

This is a design pattern created in conjunction with a development project at the Center for the Advancement of University Teaching at Stockholm University. The project aims at developing educational practice for university teachers who work with learning managementplatforms enabling them to plan and organize their teaching. Design patterns are an established method of identifying and mapping educational problems in order to offer solutions. This design pattern is a proposal how a teacher can work with course design, especially in Stockholm University learning platform "Athena".
Exploring the Effects of Data Augmentation for Drivable Area Segmentation
Creators: name: Bhuiya, Srinjoy
name: Kumar, Ayushman
name: Sen, Sankalok
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The real-time segmentation of drivable areas plays a vital role in accomplishing autonomous perception in cars. Recently there have been some rapid strides in the development of image segmentation models using deep learning. However, most of the advancements have been made in model architecture design. In solving any supervised deep learning problem related to segmentation, the success of the model that one builds depends upon the amount and quality of input training data we use for that model. This data should contain well-annotated varied images for better working of the segmentation model. Issues like this pertaining to annotations in a dataset can lead the model to conclude with overwhelming Type I and II errors in testing and validation, causing malicious issues when trying to tackle real world problems. To address this problem and to make our model more accurate, dynamic, and robust, data augmentation comes into usage as it helps in expanding our sample training data and making it better and more diversified overall. Hence, in our study, we focus on investigating the benefits of data augmentation by analyzing pre-existing image datasets and performing augmentations accordingly. Our results show that the performance and robustness of existing state of the art (or SOTA) models can be increased dramatically without any increase in model complexity or inference time. The augmentations decided on and used in this paper were decided only after thorough research of several other augmentation methodologies and strategies and their corresponding effects that are in widespread usage today. All our results are being reported on the widely used Cityscapes Dataset.
description: 16 pages, 10 figures, Presented at International Conference of Undergraduate Students, ICUS 2021
Spintronic devices from bilayer graphene in contact to ferromagnetic insulators
Creators: name: Michetti, Paolo
name: Recher, Patrik
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Graphene-based materials show promise for spintronic applications due to their potentially large spin coherence length. On the other hand, because of their small intrinsic spin-orbit interaction, an external magnetic source is desirable in order to perform spin manipulation. Because of the flat nature of graphene, the proximity interaction with a ferromagnetic insulator (FI) surface seems a natural way to introduce magnetic properties into graphene. Exploiting the peculiar electronic properties of bilayer graphene coupled with FIs, we show that it is possible to devise very efficient gate-tunable spin-rotators and spin-filters in a parameter regime of experimental feasibility. We also analyze the composition of the two spintronic building blocks in a spin-field-effect transistor.
description: 9 pages, 7 figures, revised version, a figure added
I bambini e la copia: il valore della copia grafica nel confronto interpersonale
Creators: name: Grassi, Michel
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2012

description: Questo elaborato si focalizza sul vissuto dei bambini e del gruppo-classe per rapporto all’attività copiativa, in particolare alla copia di un disegno fatto da un compagno. Lo spunto nasce da considerazioni fatte da alcuni artisti quali Picasso o Giacometti, per esempio, che nel corso della loro attività si lasciarono ispirare da opere di altri autori. Nel copiare questi manufatti riscontrarono una maggiore conoscenza, una vicinanza più prossima nei confronti dei creatori di questi ultimi e della loro cultura d’appartenenza. La ricerca vuole dunque indagare in che modo queste intuizioni possono essere usate nella didattica per sviluppare capacità non solo in ambito grafico, ma anche in quello socio-emotivo. A una classe vengono proposte due attività di copiatura. La prima si concentra sulla copia dell’opera di un artista. Nella seconda i bambini, dopo aver in precedenza prodotto un disegno spontaneo, si ritrovano a copiare quello di un loro compagno senza sapere esattamente di chi è. Si pensa che questa attività possa stimolare la riflessione, l’apertura, l’interazione fra gli allievi e in qualche modo contribuisca alla creazione di un buon clima di classe. I principali strumenti di ricerca per sondare il vissuto dei bambini e l’influsso delle attività sul clima di classe, sono la discussione con gli allievi e le interviste al docente titolare. Ad affiancarli vi è pure l’uso di un test sociometrico. Si tratta dunque di una ricerca qualitativa supportata da dati quantitativi. Relatore: Dario Bianchi
Evaluating the comprehensive role of endophytic nitrogen-fixing bacteria in sustaining the growth of boreal forest trees on nutrient-poor soils
Creators: name: Puri, Akshit
Publisher: name: University of British Columbia
Year: 2020

description: West Chilcotin region located in the Sub-Boreal Pine-Spruce xeric-cold biogeoclimatic zone of British Columbia is characterized by cold climate, low annual precipitation and weakly developed soils. Lodgepole pine and hybrid white spruce comprise the most common tree stands in this region. Soils examined from pine and spruce stands revealed that they have poor physico-chemical health and limited plant-available nutrients, particularly nitrogen. Despite the severely nitrogen-limited soils, the continued, vigorous growth of pine and spruce trees is a major conundrum. A rarely evaluated but possible nitrogen-input could be through endophytic diazotrophic bacteria – nitrogen-fixing bacteria living inside plant tissues. Examining this possibility, 55 and 48 bacterial strains were isolated on nitrogen-free media from internal tissues of pine and spruce, respectively, of which 23 and 18 strains showed positive nitrogenase activity. Six strains each from pine and spruce that showed highest nitrogenase activity were evaluated for their effects on their original host as well as the other tree species (i.e., spruce bacteria tested with pine and pine bacteria tested with spruce) in greenhouse trials. All strains colonized both pine and spruce and performed similarly well in both hosts, contributing 15-56% of host’s foliar nitrogen from the atmosphere after one year and significantly enhancing seedling length and biomass. These strains also possess several other plant-growth-promoting abilities such as inorganic and organic phosphate solubilization, IAA production, ACC deaminase activity, siderophore production and lytic enzyme activity. Notably, four strains closely related to the genus Burkholderia – Caballeronia sordidicola LS-S2r and HP-S1r, Caballeronia udeis LP-R2r and Paraburkholderia phytofirmans LP-R1r – provided up to 5.5mg nitrogen per kg tissue to their host after one year, enhanced seedling biomass by up to 7-fold in 18 months and showed significant potential in the aforementioned plant-growth-promoting mechanisms. Therefore, the ability of such highly effective endophytic diazotrophic bacteria to form beneficial ecological associations with pine and spruce trees could explain their sustained growth on extremely nutrient-limited soils of the West Chilcotin region. Furthermore, their effectiveness with a foreign host indicates the lack of plant x microbe specificity, raising the possibility of their utilization as potential biofertilizers to regenerate trees in disturbed and nutrient-poor ecosystems.
New outlook on the Minimal Model Program, II
Creators: name: Corti, Alessio
name: Lazić, Vladimir
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14E30

description: We prove that the finite generation of adjoint rings proved in [Cascini and Lazić] implies all the foundational results of the Minimal Model Program: the Rationality, Cone and Contraction theorems, the existence of flips, and termination of flips with scaling in the presence of a big boundary.
description: to appear in Math. Ann
DALLE-URBAN: Capturing the urban design expertise of large text to image transformers
Creators: name: Seneviratne, Sachith
name: Senanayake, Damith
name: Rasnayaka, Sanka
name: Vidanaarachchi, Rajith
name: Thompson, Jason
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Automatically converting text descriptions into images using transformer architectures has recently received considerable attention. Such advances have implications for many applied design disciplines across fashion, art, architecture, urban planning, landscape design and the future tools available to such disciplines. However, a detailed analysis capturing the capabilities of such models, specifically with a focus on the built environment, has not been performed to date. In this work, we investigate the capabilities and biases of such text-to-image methods as it applies to the built environment in detail. We use a systematic grammar to generate queries related to the built environment and evaluate resulting generated images. We generate 1020 different images and find that text to image transformers are robust at generating realistic images across different domains for this use-case. Generated imagery can be found at the github: https://github.com/sachith500/DALLEURBAN
description: Accepted to DICTA 2022, released 11000+ environmental scene images generated by Stable Diffusion and 1000+ images generated by DALLE-2
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð¸ Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¼ÐµÑÐ¾Ð´Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð¿Ð¾Ð´Ñ Ð¾Ð´Ð° Ðº ÑÐ¾Ð·Ð´Ð°Ð½Ð¸Ñ Ð¿ÐµÑÑÐ¾Ð½Ð°Ð¶Ð° Ð´Ð»Ñ Ð ÐÐ-Ð¸Ð³Ñ Ñ ÑÑÐµÑÐ¾Ð¼ Ð¿ÑÐ¸Ñ Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð²Ð¾ÑÐ¿ÑÐ¸ÑÑÐ¸Ñ Ð³ÐµÐ¹Ð¼ÐµÑÐ¾Ð¼ ÑÑÐµÐ¿ÐµÐ½Ð¸ ÑÐµÐ°Ð»Ð¸Ð·Ð¼Ð° Ð¸Ð³ÑÐ¾Ð²Ð¾Ð³Ð¾ Ð¿ÑÐ¾ÑÐµÑÑÐ°
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Development and justification of methodical approach to character creation for RPG-games taking into account psychological perception by the gamer of degree of realism of the gameplay
Creators: name: ÐÐµÐ²ÐµÐ´Ð¾Ð¼ÑÐºÐ°Ñ, ÐÐ°ÑÐ¾Ð»Ð¸Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2018
Subjects: ÐÐ°ÑÐ¸Ð½Ð½Ð°Ñ Ð³ÑÐ°ÑÐ¸ÐºÐ°
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description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ñ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ Ð¾ÑÐ¾Ð±ÑÐ°Ð¶ÐµÐ½Ð¸Ñ Ð¾Ð±ÑÐ°Ð·Ð° Ð¸Ð³ÑÐ¾Ð²Ð¾Ð³Ð¾ Ð¿ÐµÑÑÐ¾Ð½Ð°Ð¶Ð° Ð² Ð ÐÐ-Ð¸Ð³ÑÐ°Ñ Ð¸ Ð¼ÐµÑÐ¾Ð´Ñ ÐµÐ³Ð¾ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¸, ÑÑÐ¸ÑÑÐ²Ð°ÑÑÐ¸Ðµ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ Ð¿ÑÐ¸ÑÐ¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð²Ð¾ÑÐ¿ÑÐ¸ÑÑÐ¸Ñ Ð³ÐµÐ¹Ð¼ÐµÑÐ¾Ð¼ ÑÐµÐ°Ð»Ð¸Ð·Ð¼Ð° Ð¸Ð³ÑÐ¾Ð²Ð¾Ð³Ð¾ Ð¿ÑÐ¾ÑÐµÑÑÐ°. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð¾Ð±Ð·Ð¾Ñ ÑÑÑÐµÑÑÐ²ÑÑÑÐ¸Ñ Ð°Ð½Ð°Ð»Ð¾Ð³Ð¾Ð² Ð² Ð¸Ð³ÑÐ¾Ð²Ð¾Ð¹ Ð¸Ð½Ð´ÑÑÑÑÐ¸Ð¸ ÑÑÐµÐ´Ð¸ Ð½Ð°Ð¸Ð±Ð¾Ð»ÐµÐµ ÑÑÐ¿ÐµÑÐ½ÑÑ Ð¸Ð³Ñ Ð´Ð°Ð½Ð½Ð¾Ð³Ð¾ Ð¶Ð°Ð½ÑÐ°. ÐÐ° Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ð¸ Ð¿ÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½ Ð¼ÐµÑÐ¾Ð´Ð¸ÑÐµÑÐºÐ¸Ð¹ Ð¿Ð¾Ð´ÑÐ¾Ð´ Ð¿Ð¾ ÑÐ¾Ð·Ð´Ð°Ð½Ð¸Ñ Ð¸Ð³ÑÐ¾Ð²Ð¾Ð³Ð¾ Ð¿ÐµÑÑÐ¾Ð½Ð°Ð¶Ð° Ð´Ð»Ñ Ð ÐÐ-Ð¸Ð³ÑÑ Ñ ÑÑÐµÑÐ¾Ð¼ Ð¿ÑÐ¸ÑÐ¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð²Ð¾ÑÐ¿ÑÐ¸ÑÑÐ¸Ñ Ð³ÐµÐ¹Ð¼ÐµÑÐ¾Ð¼ ÑÐµÐ°Ð»Ð¸Ð·Ð¼Ð° ÑÑÐµÐ¿ÐµÐ½Ð¸ Ð¸Ð³ÑÐ¾Ð²Ð¾Ð³Ð¾ Ð¿ÑÐ¾ÑÐµÑÑÐ° Ñ ÐµÐ³Ð¾ Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸ÐµÐ¹.
description: In this paper, the features of displaying the image of the game character in RPG games and methods of its development, taking into account the features of the psychological perception of realism gamer gameplay. A review of existing analogues in the gaming industry among the most successful games of this genre. On the basis of the study developed a methodical approach to the creation of a game character for RPG-games, taking into account the psychological perception of realism gamer degree of gameplay with its practical implementation.
Petite pause @ grammaire comparative
Creators: name: Zanin, Rossella
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2018

description: È possibile accrescere la consapevolezza riguardo al funzionamento delle lingue e dare un impulso alla riflessione metalinguistica con attività volte ad allenare e osservare i fenomeni linguistici, al fine di individuare analogie e differenze tra lingue affini - e non - in un’ottica comparativo-contrastiva? A tale quesito, attraverso gli approcci plurali, si è inteso dare una risposta, per quanto circonstanziata all’analisi condotta in una classe composta da venti allievi di seconda media, restringendo ulteriormente il campo di indagine a cinque alunni. Prima di avviare il percorso di attività elaborate allo scopo, è stato somministrato agli allievi un questionario iniziale - per verificare la loro abilità nell’osservare i fenomeni linguistici per risolvere compiti in quest’ambito e misurarne la sistematicità d’uso - e un questionario finale, sotto forma di due attività ad hoc, che consentissero, in modo esplicito o implicito, di misurare il cambiamento, ove esso fosse intervenuto, nell’abilità di osservazione e nel ricorso autonomo e sistematico a questa strategia per apprendere le lingue. I dati raccolti permettono di rispondere positivamente al quesito della ricerca. Relatrice: Marie-Hélène Tramèr-Rudolphe. Materia: Curriculum plurilingue: Francese, Italiano lingua straniera
Thermal magnetized D-branes on $R^{1,p}\times T^{d-p-1}$ in the generalized Thermo Field Dynamics approach
Creators: name: Nardi, R.
name: Santos, M. A.
name: Vancea, I. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct the D-brane states at finite temperature in thermal equilibrium in the $\mathbb{R}^{1,p}\times{\mathbb{T}}^{d-p-1}$ spacetime in the presence of cold (unthermalized) Kalb-Ramond (KR) and U(1) gauge potential background. To this end, we first generalize the Thermo Field Dynamics (TFD) to wrapped closed strings. This generalization is consistent with the spatial translation invariance on the string world-sheet. Next, we determine the thermal string vacuum and define the entropy operator. From these data we calculate the entropy of the closed string and the free energy. Finally, we define the thermal D-brane states in $\mathbb{R}^{1,p}\times{\mathbb{T}}^{d-p-1}$ in the presence of cold constant KR field and U(1) gauge potential as the boundary states of the thermal closed string and compute their entropy.
description: Minor error and misprints corrected. 22 pages
High-order Discontinuous Galerkin hydrodynamics with sub-cell shock capturing on GPUs
Creators: name: Cernetic, Miha
name: Springel, Volker
name: Guillet, Thomas
name: Pakmor, Rüdiger
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Hydrodynamical numerical methods that converge with high-order hold particular promise for astrophysical studies, as they can in principle reach prescribed accuracy goals with higher computational efficiency than standard second- or third-order approaches. Here we consider the performance and accuracy benefits of Discontinuous Galerkin (DG) methods, which offer a particularly straightforward approach to reach extremely high order. Also, their computational stencil maps well to modern GPU devices, further raising the attractiveness of this approach. However, a traditional weakness of this method lies in the treatment of physical discontinuities such as shocks. We address this by invoking an artificial viscosity field to supply required dissipation where needed, and which can be augmented, if desired, with physical viscosity and thermal conductivity, yielding a high-order treatment of the Navier-Stokes equations for compressible fluids. We show that our approach results in sub-cell shock capturing ability, unlike traditional limiting schemes that tend to defeat the benefits of going to high order in DG in problems featuring many shocks. We demonstrate exponential convergence of our solver as a function of order when applied to smooth flows, such as the Kelvin-Helmholtz reference problem of arXiv:1509.03630. We also demonstrate excellent scalability of our GPU implementation up to hundreds of GPUs distributed on different compute nodes. In a first application to driven, sub-sonic turbulence, we highlight the accuracy advantages of high-order DG compared to traditional second-order accurate methods, and we stress the importance of physical viscosity for obtaining accurate velocity power spectra.
description: 27 pages, 22 figures, accepted for publication in MNRAS
Electron-Positron Pair Production by an Electron in a Magnetic Field Near the Process Threshold
Creators: name: Novak, O. P.
name: Kholodov, R. I.
name: Fomin, P. I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The electron-positron pair production by an electron in a strong magnetic field near the process threshold is considered. The process is shown to be more probable if the spin of the initial electron is oriented along the field. In this case, the probability of the process is $\sim10^{13} s^{-1}$ when the magnetic field strength is $H=4\cdot 10^{12}$ G.
description: 5 pages, 3 figures, 1 table
Geografia e didattica per progetti: la didattica per progetti e la motivazione a imparare la geografia
Creators: name: Papais, Sophie
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2020
Subjects: geografia
didattica per progetti
motivazione
San Gottardo

description: La seguente tesi di bachelor sviluppa la tematica della didattica per progetti applicata alle scuole elementari nella disciplina di ambiente (geografia). Ho deciso di proporre questo genere di didattica in geografia e osservare se questo tipo di impostazione favorisce l’apprendimento della disciplina e aumenta la motivazione degli allievi. Il progetto è dunque caratterizzato da una forte partecipazione dei bambini nelle diverse fasi di progettazione, realizzazione e revisione dello stesso. Per questo motivo è spesso necessario prendersi il tempo per riflettere su quanto svolto in classe e aprire molteplici discussioni con i bambini. La ricerca indaga su una piccola quantità di persone (il gruppo classe) e ha come scopo quello di osservare e mettere in relazione i vari comportamenti degli allievi. Siccome l’obbiettivo non è quello di quantificare dei dati numerici possiamo definire il lavoro di diploma come una ricerca qualitativa. Inoltre, parliamo di una ricerca-azione, in quanto il ricercatore è allo stesso tempo attore nel lavoro d’indagine. Infatti, il mio ruolo sarà duplice: quello d’insegnante e quello di ricercatrice. Nonostante il numero esiguo del campione, le conclusioni del lavoro di tesi lasciano supporre che nella classe in cui è stata proposta la didattica per progetti i bambini si sono sentiti più coinvolti e, di conseguenza, è aumentata la loro partecipazione in classe, sintomo di una maggiore motivazione. Relatore: Luca Groppi.
Modular Vehicle Routing for Combined Passenger and Freight Transport
Creators: name: Hatzenbühler, Jonas
name: Jenelius, Erik
name: Gidófalvi, Győző
name: Cats, Oded
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: The continuous increase in urban deliveries and the ongoing urbanization of large cities require the development of efficient and sustainable transportation solutions. This study investigates the impact of modular vehicle concepts and the consolidation of different demand types in the route planning on the efficiency of the urban freight and passenger transportation system. Modularity is achieved by connecting multiple vehicles together to form a platoon. The consolidation of different demand types is realized by simultaneously consider passenger and freight demand in the optimization algorithm. The considered vehicles are specific for each demand type by can be connected freely, hence it is possible to transport different demand types in the same platoon. The cost terms in the problem formulation are comprised of travel time costs, travel distance costs, fleet size costs, and cost considering unserved requests. The modular vehicle operations are modeled in a novel pickup and delivery problem which is solved using CPLEX and Adaptive Large Neighborhood Search. In an extensive scenario study and case study in Stockholm, the potentials of the new modular vehicle type are explored for different spatial and temporal demand distributions. A parameter study on vehicle capacity, vehicle range and cost saving assumptions is performed to study their influence on the efficiency. The experiments carried out indicate a general cost savings of 48% due to modularity and an additional 9% due to consolidation. The reduction mainly stems from reduced operating costs and reduced trip duration, while the same number of requests can be served in all cases. Empty vehicle kilometers are reduced by more than 60% by consolidation and modularity. The proposed model and optimization framework can be used by companies and policy makers to identify required fleet sizes, optimal vehicle routes and cost savings.
Exponential approximation for the nearly critical Galton-Watson process and occupation times of Markov chains
Creators: name: Peköz, E.
name: Röllin, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F05 (Primary) 60J80, 60J10 (Secondary)

description: In this article we provide new applications for exponential approximation using the framework of Peköz and Röllin (in press), which is based on Stein's method. We give error bounds for the nearly critical Galton-Watson process conditioned on non-extinction, and for the occupation times of Markov chains; for the latter, in particular, we give a new exponential approximation rate for the number of revisits to the origin for general two dimensional random walk, also known as the Erdős-Taylor theorem.
description: 14 pages, final version
Direct Determination of Enzymes in Dried Blood Spots by High-Performance Liquid Chromatography – Mass Spectrometry (HPLC-MS) for the Screening of Antithrombotic Agents
Creators: name: Li, Ru
name: Zou, Xuan
name: Luan, Pan
name: Liu, Xiaokun
name: Wang, Ning
name: Wang, Qian
name: Guan, Huashi
name: Xu, Zhe
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Hematology

description: Thrombosis is the main cause of many cardiovascular diseases. The conventional pharmaceuticals used for preventing thrombosis can induce significant adverse side effects, especially bleeding risk. Hence, the development of more effective and safe antithrombotic agents is strongly demanded to improve clinical treatment. In order to rapidly screen and identify novel antithrombotic substances from natural marine products, a multi-target screening strategy is reported to quantify the antithrombotic activity with high-performance liquid chromatography – mass spectrometry (HPLC-MS). Five key thrombosis-related targets, including thrombin, coagulation factors Xa, XIa and XIIa and platelet phosphodiesterase 3, were selected to establish the multi-target antithrombotic activity screening assay. The Michaelis-Menten constants (Km) were 8.16 µM, 58.85 µM, 120.03 µM, 35.24 µM and 79.67 µM, respectively. Five known inhibitors, namely argatroban, rivaroxaban, benzamidine, 3-carboxamide-coumarinand, and milrinone, were used for validation. The reproducibility of the screening strategy was verified by calculating the overall average Z′ value, which was 0.88. Subsequently, this method was assessed by screening a small marine library of 78 compounds. Five coumarin compounds were selected, and their antithrombotic activities were further validated in standard assessments of enzyme inhibition and on the coagulometer. According to the validation, the multi-target assay based on dried blood spots and HPLC-MS was suitable for screening antithrombotic substances with considerable reliability.
Holomorphic linearization of commuting germs of holomorphic maps
Creators: name: Raissy, Jasmin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Dynamical Systems (math.DS)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 37F50 (Primary) 32H50 (Secondary)

description: Let $f_1, ..., f_h$ be $h\ge 2$ germs of biholomorphisms of $\C^n$ fixing the origin. We investigate the shape a (formal) simultaneous linearization of the given germs can have, and we prove that if $f_1, ..., f_h$ commute and their linear parts are almost simultaneously Jordanizable then they are simultaneously formally linearizable. We next introduce a simultaneous Brjuno-type condition and prove that, in case the linear terms of the germs are diagonalizable, if the germs commutes and our Brjuno-type condition holds, then they are holomorphically simultaneously linerizable. This answers to a multi-dimensional version of a problem raised by Moser.
description: 24 pages; final version with erratum (My original paper failed to cite the work of L. Stolovitch [ArXiv:math/0506052v2]); J. Geom. Anal. 2012
Essential self-adjointness of magnetic Schrödinger operators on locally finite graphs
Creators: name: Milatovic, Ognjen
Publisher: name: arXiv
Year: 2010
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 05C63, 05C50, 35J10, 47B25

description: We give sufficient conditions for essential self-adjointness of magnetic Schrödinger operators on locally finite graphs. Two of the main theorems of the present paper generalize recent results of Torki-Hamza.
description: 14 pages; The present version differs from the original version as follows: the ordering of presentation has been modified in several places, more details have been provided in several places, some notations have been changed, two examples have been added, and several new references have been inserted. The final version of this preprint will appear in Integral Equations and Operator Theory
AdS Virasoro-Shapiro from single-valued periods
Creators: name: Alday, Luis F.
name: Hansen, Tobias
name: Silva, Joao A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We determine the full $1/\sqrtλ$ correction to the flat-space Wilson coefficients which enter the AdS Virasoro-Shapiro amplitude in $\mathcal{N}=4$ SYM theory at strong coupling. The assumption that the Wilson coefficients are in the ring of single-valued multiple zeta values, as expected for closed string amplitudes, is surprisingly powerful and leads to a unique solution to the dispersive sum rules relating Wilson coefficients and OPE data obtained in [1]. The corresponding OPE data fully agrees with and extends the results from integrability. The Wilson coefficients to order $1/\sqrtλ$ can be summed into an expression whose structure of poles and residues generalises that of the Virasoro-Shapiro amplitude in flat space.
description: 37 pages, 1 figure, v2: JHEP version, v3: minor correction
Neural Media Bias Detection Using Distant Supervision With BABE -- Bias Annotations By Experts
Creators: name: Spinde, Timo
name: Plank, Manuel
name: Krieger, Jan-David
name: Ruas, Terry
name: Gipp, Bela
name: Aizawa, Akiko
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Media coverage has a substantial effect on the public perception of events. Nevertheless, media outlets are often biased. One way to bias news articles is by altering the word choice. The automatic identification of bias by word choice is challenging, primarily due to the lack of a gold standard data set and high context dependencies. This paper presents BABE, a robust and diverse data set created by trained experts, for media bias research. We also analyze why expert labeling is essential within this domain. Our data set offers better annotation quality and higher inter-annotator agreement than existing work. It consists of 3,700 sentences balanced among topics and outlets, containing media bias labels on the word and sentence level. Based on our data, we also introduce a way to detect bias-inducing sentences in news articles automatically. Our best performing BERT-based model is pre-trained on a larger corpus consisting of distant labels. Fine-tuning and evaluating the model on our proposed supervised data set, we achieve a macro F1-score of 0.804, outperforming existing methods.
description: substantial text overlap with Ph.D. proposal by same author, part of dissertation arXiv:2112.13352
NON è UN cliché Sviluppo sperimentale dell’uso della matrice con focus sulla stampa zincografica.
Creators: name: Siciliano, Arianna
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2022

description: Sono convinta che per poter comprendere il potenziale della nuova tecnologia, e di tutti i nuovi strumenti di cui disponiamo al giorno d’oggi, sia necessario un ritorno alle origini. Anche se la tecnologia ha fatto progressi notevoli, facendo sì che le tecniche di stampa usate in passato venissero sorpassate dalle nuove invenzioni, non penso che riusciranno mai ad eliminarle completamente. “NON è UN cliché” ha proprio questo obiettivo: mostrare quanto può essere affascinante, ampia ed interessante una tecnica di stampa che sta sempre più scomparendo dal repertorio comune. Il progetto di tesi è un nostalgico tuffo nel passato, pur volendo creare una continuità con il futuro.
MOESM1 of Enhanced biosynthesis of phenazine-1-carboxamide by engineered Pseudomonas chlororaphis HT66
Creators: name: Peng, Huasong
name: Zhang, Pingyuan
name: Bilal, Muhammad
name: Wang, Wei
name: Hu, Hongbo
name: Zhang, Xuehong
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Computational Biology

description: Additional file 1. Additional figures and tables.
title: Spektrum : the science magazine of the University of Bayreuth - Oktober 2021
Creators: name: Universität Bayreuth, Pressestelle
Publisher: name: University of Bayreuth
Year: 2021
Subjects: subject: spektrum
subject: Universität Bayreuth
subject: Uni Bayreuth
subject: Forschung
subject: Wissenschaft
subject: Neuigkeiten
subject: 000
subject: 050
subject: 070

description: In our magazine Spektrum, you can always find out what topics our researchers are working on and what innovations are being developed at the University of Bayreuth campus. Cover topic of this issue: "Uncertainty".
Testing a Phenomenologically Extended DGP Model with Upcoming Weak Lensing Surveys
Creators: name: Camera, Stefano
name: Diaferio, Antonaldo
name: Cardone, Vincenzo F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A phenomenological extension of the well-known brane-world cosmology of Dvali, Gabadadze and Porrati (eDGP) has recently been proposed. In this model, a cosmological-constant-like term is explicitly present as a non-vanishing tension sigma on the brane, and an extra parameter alpha tunes the cross-over scale r_c, the scale at which higher dimensional gravity effects become non negligible. Since the Hubble parameter in this cosmology reproduces the same LCDM expansion history, we study how upcoming weak lensing surveys, such as Euclid and DES (Dark Energy Survey), can confirm or rule out this class of models. We perform Markov Chain Monte Carlo simulations to determine the parameters of the model, using Type Ia Supernovæ, H(z) data, Gamma Ray Bursts and Baryon Acoustic Oscillations. We also fit the power spectrum of the temperature anisotropies of the Cosmic Microwave Background to obtain the correct normalisation for the density perturbation power spectrum. Then, we compute the matter and the cosmic shear power spectra, both in the linear and non-linear regimes. The latter is calculated with the two different approaches of Hu and Sawicki (2007) (HS) and Khoury and Wyman (2009) (KW). With the eDGP parameters coming from the Markov Chains, KW reproduces the LCDM matter power spectrum at both linear and non-linear scales and the LCDM and eDGP shear signals are degenerate. This result does not hold with the HS prescription: Euclid can distinguish the eDGP model from LCDM because their expected power spectra roughly differ by the 3sigma uncertainty in the angular scale range 700
description: 22 pages, 5 figures, 4 tables, JCAP in press
title: Spektrum - Oktober 2021
Creators: name: Universität Bayreuth, Pressestelle
Publisher: name: University of Bayreuth
Year: 2021
Subjects: subject: spektrum
subject: Universität Bayreuth
subject: Uni Bayreuth
subject: Forschung
subject: Wissenschaft
subject: Neuigkeiten
subject: 000
subject: 050
subject: 070

description: In unserem Magazin Spektrum erfahren Sie immer, mit welchen Themen sich unsere Forscherinnen und Forscher beschäftigen und welche Innovationen am Campus der Universität Bayreuth entwickelt werden. Titelthema dieser Ausgabe: "Ungewissheit".
Theory of Glide Symmetry Protected Helical Edge States in WTe$_{2}$ Monolayer
Creators: name: Bieniek, Maciej
name: Väyrynen, Jukka I.
name: Li, Gang
name: Neupert, Titus
name: Thomale, Ronny
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Helical edge states in quantum spin Hall (QSH) materials are central building blocks of topological matter design and engineering. Despite their principal topological protection against elastic backscattering, the level of operational stability depends on manifold parameters such as the band gap of the given semiconductor system in the 'inverted' regime, temperature, disorder, and crystal orientation. We theoretically investigate electronic and transport properties of QSH edge states in large gap 1-T' WTe$_{2}$ monolayers. We explore the impact of edge termination, disorder, temperature, and interactions on experimentally addressable edge state observables, such as local density of states and conductance. We show that conductance quantization can remain surprisingly robust even for heavily disordered samples because of an anomalously small edge state decay length and additional protection related to the large direct gap allowed by glide symmetry. From the simulation of temperature-dependent resistance, we find that moderate disorder enhances the stability of conductance by localizing bulk states. We evaluate the edge state velocity and Luttinger liquid parameter as functions of the chemical potential, finding prospects for physics beyond linear helical Luttinger liquids in samples with ultra-clean and well-defined edges.
Prospects for a lattice calculation of the rare decay $Σ^+\to p\ell^+\ell^-$
Creators: name: Erben, Felix
name: Gülpers, Vera
name: Hansen, Maxwell T.
name: Hodgson, Raoul
name: Portelli, Antonin
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a strategy for calculating the rare decay of a $Σ^+ (uus)$ baryon to a proton $(uud)$ and di-lepton pair using lattice QCD. To determine this observable one needs to numerically evaluate baryonic two-, three-, and four-point correlation functions related to the target process. In particular, the four-point function arises from the insertion of incoming and outgoing baryons, together with a weak Hamiltonian mediating the $s \to d$ transition and an electromagnetic current creating the outgoing leptons. As is described in previous work in other contexts, this four-point function has a highly non-trivial relation to the physical observable, due to nucleon and nucleon-pion intermediate states. These lead to growing Euclidean time dependence and, in the case of the nucleon-pion states, to power-like volume effects. We discuss how to treat these issues in the context of the $Σ^+\rightarrow p\ell^+\ell^-$ decay and, in particular, detail the relation between the finite-volume estimator and the physical, complex-valued amplitude. In doing so, we also make connections between various approaches in the literature.
Numerical Simulations of Tidal Deformation and Resulting Light Curves of Small Bodies: Material Constraints of 99942 Apophis and 1I/`Oumuamua
Creators: name: Taylor, Aster G.
name: Seligman, Darryl Z.
name: MacAyeal, Douglas R.
name: Hainaut, Olivier R.
name: Meech, Karen J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In this paper, we present an open source software ($\texttt{SAMUS}$) which simulates constant-density, constant-viscosity liquid bodies subject to tidal forces for a range of assumed viscosites and sizes. This software solves the Navier-Stokes equations on a finite-element mesh, incorporating the centrifugal, Coriolis, self-gravitational, and tidal forces. The primary functionality is to simulate the deformation of minor bodies under the influence of tidal forces. It may therefore be used to constrain the composition and physical structure of bodies experiencing significant tidal forces, such as 99942 Apophis and 1I/`Oumuamua. We demonstrate that $\texttt{SAMUS}$ will be useful to constrain the material properties of Apophis during its near-Earth flyby in 2029. Depending on the material properties, Apophis may experience an area change of up to 0.5\%, with similar effects on the photometric brightness. We also apply $\texttt{SAMUS}$ to constrain the material dynamic viscosity of 1I/`Oumuamua, the first interstellar object discovered traversing the inner Solar System. `Oumuamua experienced a close approach to the Sun at perihelion ($q\simeq 0.25$ au) during which there were significant tidal forces that may have caused deformation of the body. This deformation could have lead to observable changes in the photometric light curve based on the material properties. The application of $\texttt{SAMUS}$ to produce synthetic observations which incorporate tidal deformation effects demonstrate that no deformation -- an infinite dynamic viscosity -- best reproduces the photometric data. While these results indicate that `Oumuamua did not experience significant tidal deformation, a sophisticated model incorporating non-principal axis rotation is necessary to conclusively analyze both `Oumuamua and Apophis.
description: 26 pages, 15 figures, 5 tables. Accepted by AAS Planetary Science Journal. Split into two papers based on reviewer and editor suggestions. Comments welcome. Publicly available software at https://github.com/astertaylor/Oumuamua