cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Traditional amateur video producers’ use of the Internet:making connections in a complex and contested environment
Creators: name: Hondros, John
Publisher: name: University of Westminster
Year: 2013

description: The Internet has been adopted as a video distribution technology by different categories of amateur video producers who were using other distribution methods prior to its advent. I conducted a one-year ethnographic study of amateur producers from three such categories (public access television producers, video activists, and film and television fans) to understand their reasons for this adoption, how they used this technology, and the interactions with their audiences that followed from its use, analysing my findings within a new materialist framework. I found that the producers had a diverse set of reasons for going online and that these largely depended on their specific circumstances, and on how they saw the online environment in relation to their overall objectives as video makers. These circumstances and objectives also meant that some producers resisted going online at all, or used the technology in a restricted way, and that traditional distribution methods continued to exist in some form alongside the Internet-based ones. The producers assembled together different people and technologies to distribute their videos, which was often a complex and contested process, typically resulting in distribution assemblages that were precarious and that required on-going maintenance. These assemblages used a wide variety of technological components, selected for a broad range of reasons, which also largely reflected the specific circumstances and objectives of the producers. I also found that the producers varied considerably in their attitude towards audience engagement, as well as in the methods they used to achieve it, and in the success of those methods. Some were in fact indifferent to it, while others considered it a critical part of their activities. While some were successful in producing sustained interactions with their audiences, others failed to do so. These findings enrich and problematize our current understanding of this emergent phenomenon.
Characterization of entangling properties of quantum measurement via two-mode quantum detector tomography using coherent state probes
Creators: name: Yokoyama, Shota
name: Pozza, Nicola Dalla
name: Serikawa, Takahiro
name: Kuntz, Katanya B.
name: Wheatley, Trevor A.
name: Dong, Daoyi
name: Huntington, Elanor H.
name: Yonezawa, Hidehiro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Entangled measurement is a crucial tool in quantum technology. We propose a new entanglement measure of multi-mode detection, which estimates the amount of entanglement that can be created in a measurement. To illustrate the proposed measure, we perform quantum tomography of a two-mode detector that is comprised of two superconducting nanowire single photon detectors. Our method utilizes coherent states as probe states, which can be easily prepared with accuracy. Our work shows that a separable state such as a coherent state is enough to characterize a potentially entangled detector. We investigate the entangling capability of the detector in various settings. Our proposed measure verifies that the detector makes an entangled measurement under certain conditions, and reveals the nature of the entangling properties of the detector. Since the precise characterization of a detector is essential for applications in quantum information technology, the experimental reconstruction of detector properties along with the proposed measure will be key features in future quantum information processing.
description: 18 pages, 6 figures
Conceptualizing the Evidence Base for Harm Reduction
Creators: name: Dasgupta, Nabarun
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2024
Subjects: Drugs

description: https://www.nationalacademies.org/our-work/harm-reduction-services-for-people-who-use-drugs-exploring-data-collection-evidence-gaps-and-research-needs-a-workshop
description: Presented at the National Academies of Science, Engineering, and Medicine.
description: Recognizing the public health emergency posed by opioid overdoses, there increasingly have been calls for a comprehensive approach to drug policy that includes a focuses on reducing harm for people who use drugs (PWUD). This virtual public workshop will explore data collection efforts, evidence gaps, and research needs on harm reduction services for PWUD. The workshop will examine harm reduction services that aim to: prevent overdose and infectious disease transmission; enhance the health, safety, and wellbeing of PWUD; and offer low-threshold options for accessing substance use disorder treatment.
A review of two decades of correlations, hierarchies, networks and clustering in financial markets
Creators: name: Marti, Gautier
name: Nielsen, Frank
name: Bińkowski, Mikołaj
name: Donnat, Philippe
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: We review the state of the art of clustering financial time series and the study of their correlations alongside other interaction networks. The aim of this review is to gather in one place the relevant material from different fields, e.g. machine learning, information geometry, econophysics, statistical physics, econometrics, behavioral finance. We hope it will help researchers to use more effectively this alternative modeling of the financial time series. Decision makers and quantitative researchers may also be able to leverage its insights. Finally, we also hope that this review will form the basis of an open toolbox to study correlations, hierarchies, networks and clustering in financial markets.
The concise measurement of clinical communication skills: Validation of a short scale
Creators: name: Maaß, Ulrike
name: Kühne, Franziska
name: Heinze, Peter Eric
name: Ay-Bryson, Destina Sevde
name: Weck, Florian
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: standardized patient
subject: treatment integrity
subject: measurement
subject: therapist competence
subject: role-play
subject: psychotherapy process
subject: 150 Psychologie

description: Objective There is a lack of brief rating scales for the reliable assessment of psychotherapeutic skills, which do not require intensive rater training and/or a high level of expertise. Thus, the objective is to validate a 14-item version of the Clinical Communication Skills Scale (CCSS-S). Methods Using a sample of N = 690 video-based ratings of role-plays with simulated patients, we calculated a confirmatory factor analysis and an exploratory structural equation modeling (ESEM), assessed convergent validities, determined inter-rater reliabilities and compared these with those who were either psychology students, advanced psychotherapy trainees, or experts. Results Correlations with other competence rating scales were high (rs > 0.86–0.89). The intraclass correlations ranged between moderate and good [ICC(2,2) = 0.65–0.80], with student raters yielding the lowest scores. The one-factor model only marginally replicated the data, but the internal consistencies were excellent (α = 0.91–95). The ESEM yielded a two-factor solution (Collaboration and Structuring and Exploration Skills). Conclusion The CCSS-S is a brief and valid rating scale that reliably assesses basic communication skills, which is particularly useful for psychotherapy training using standardized role-plays. To ensure good inter-rater reliabilities, it is still advisable to employ raters with at least some clinical experience. Future studies should further investigate the one- or two-factor structure of the instrument.
Science outreach: Fysikklub@OdenseTekniskeGymnasium -- Astronomy / Astrophysics / Extrasolar planets
Creators: name: Hinse, Tobias Cornelius
Publisher: name: Zenodo
Year: 2024

description: Science communication at Odense Tekniske Gymnasium (OTG, 1.g & 2.g) about astrophysics and extrasolar planets. This was a workshop for the Fysikklub@OTG aiming at explaining about extrasolar planets, how to detect them, the transit method, table-top demonstration and production of a simulated lightcurve with an extrasolar moon and mathematical derivation of the relationship between transit depth, planet radius and star radius. Great many thanks to the host Frederik D. Kørris. This work is supported by Villum Fonden and Novo Nordisk Fonden.
Permutation Tests for Infection Graphs
Creators: name: Khim, Justin
name: Loh, Po-Ling
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistics Theory (math.ST)
subject: Social and Information Networks (cs.SI)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We formulate and analyze a novel hypothesis testing problem for inferring the edge structure of an infection graph. In our model, a disease spreads over a network via contagion or random infection, where the random variables governing the rates of contracting the disease from neighbors or random infection are independent exponential random variables with unknown rate parameters. A subset of nodes is also censored uniformly at random. Given the statuses of nodes in the network, the goal is to determine the underlying graph. We present a procedure based on permutation testing, and we derive sufficient conditions for the validity of our test in terms of automorphism groups of the graphs corresponding to the null and alternative hypotheses. Further, the test is valid more generally for infection processes satisfying a basic symmetry condition. Our test is easy to compute and does not involve estimating unknown parameters governing the process. We also derive risk bounds for our permutation test in a variety of settings, and motivate our test statistic in terms of approximate equivalence to likelihood ratio testing and maximin tests. We conclude with an application to real data from an HIV infection network.
description: 70 pages, 15 figures, 2 tables
spinDrop: a droplet microfluidic platform to maximise single-cell sequencing information content.
Creators: name: De Jonghe, Joachim
name: Kaminski, Tomasz S
name: Morse, David B
name: Tabaka, Marcin
name: Ellermann, Anna L
name: Kohler, Timo N
name: Amadei, Gianluca
name: Handford, Charlotte E
name: Findlay, Gregory M
name: Zernicka-Goetz, Magdalena
name: Teichmann, Sarah A
name: Hollfelder, Florian
Publisher: name: The Francis Crick Institute
Year: 2023
Subjects: Synthetic Biology
Tumour Biology
Gene Expression
Genetics & Genomics
Genome Integrity & Repair
Chemical Biology & High Throughput

description: Droplet microfluidic methods have massively increased the throughput of single-cell sequencing campaigns. The benefit of scale-up is, however, accompanied by increased background noise when processing challenging samples and the overall RNA capture efficiency is lower. These drawbacks stem from the lack of strategies to enrich for high-quality material or specific cell types at the moment of cell encapsulation and the absence of implementable multi-step enzymatic processes that increase capture. Here we alleviate both bottlenecks using fluorescence-activated droplet sorting to enrich for droplets that contain single viable cells, intact nuclei, fixed cells or target cell types and use reagent addition to droplets by picoinjection to perform multi-step lysis and reverse transcription. Our methodology increases gene detection rates fivefold, while reducing background noise by up to half. We harness these properties to deliver a high-quality molecular atlas of mouse brain development, despite starting with highly damaged input material, and provide an atlas of nascent RNA transcription during mouse organogenesis. Our method is broadly applicable to other droplet-based workflows to deliver sensitive and accurate single-cell profiling at a reduced cost.
title: Der Inklusionsbegriff in der außerschulischen Jugendbildung
title: Eine qualitative Auswertung pädagogischer Leitbilder
titleType: Subtitle
Creators: name: Frank, Friederike
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: außerschulisch
subject: Jugendbildung
subject: Inklusionsbegriff
subject: Inhaltsanalyse
subject: extracurricular
subject: youth education
subject: concept of inclusion
subject: qualitative content analysis
subject: 370 Bildung und Erziehung

description: Während die Inklusionsforschung im schulischen und beruflichen Feld immer weiter voranschreitet, ist das Feld der außerschulischen Jugendarbeit, insbesondere der außerschulischen Jugendbildung, in Bezug auf dieses Thema nicht hinreichend beforscht. Dabei liegen in diesem Feld auf Grund der heterogenen und freiwilligen Teilnehmer:innenschaft sowie den sich bietenden Räumen für Entwicklung, Bildung und Sozialisation verborgene Chancen für Inklusion, die noch nicht voll ausgeschöpft werden. Die vorliegende Masterarbeit stellt die Ergebnisse einer Untersuchung vor, welche dem Inklusionsbegriff in der außerschulischen Jugendbildung nachgeht. Dabei steht die Frage nach einem expliziten und impliziten Inklusionsbegriff von Trägern der außerschulischen Jugendbildung im Fokus. Dazu werden die Leitbilder dieser Einrichtungen im Bereich Berlin und Brandenburg zunächst mithilfe der Qualitativen Inhaltsanalyse (angelehnt an Mayring) evaluiert. Nach einer Darstellung der herausgearbeiteten Begriffsverständnisse sowie verwandter Theorien und Konzepte wird eine Diskursanalyse (angelehnt an Keller) zu den Grundlagen der Inklusionsverständnisse der Träger durchgeführt. Festzuhalten ist ein impliziter und eher breiter Inklusionsbegriff in der außerschulischen Jugendbildung, welcher in der Praxis bisher noch nicht umgesetzt wird oder werden kann.
description: While research on inclusion in the school and vocational field is progressing more and more, the field of extracurricular youth work, especially extracurricular youth education, has not been well-researched so far. This is even though due to the heterogeneous and voluntary participants and spaces for development, education, and socialization this field offers hidden opportunities for inclusion that have not yet been fully exploited. This master's thesis presents the results of an investigation into the concept of inclusion in out-of-school youth education. The focus is on the question of an explicit and implicit concept of inclusion of providers of out-of-school youth education. To this end, the mission statements of organizations in Berlin and Brandenburg will be evaluated with the help of qualitative content analysis (based on Mayring). In addition to a presentation of the conceptual understandings identified as well as related theories and concepts, a discourse analysis (based on Keller) is then carried out on the principles informing the providers' understandings of inclusion. An implicit and rather broad concept of inclusion in out-of-school youth education is found.
Tutorial: How to plot High-Quality Molecular Electrostatic Potential Surfaces (MEPS)
Creators: name: Mattia Felice, Palermo
Publisher: name: ModelingHub
Year: 2024
Subjects: computational chemistry
molecular modelling
electronic structure methods
DFT
electrostatic potential surface
charge

description: ACCESS THE TUTORIAL HERE: https://modelinghub.xyz/tutorial-molecular-electrostatic-potential-surfaces-mep/ 

This tutorial on ModelingHub.xyz provides a comprehensive guide to generating and visualizing Molecular Electrostatic Potential Surfaces (MEPS) using ORCA and Chimera. It outlines the scientific importance of MEPS, details the required steps for running ORCA calculations, post-processing the data with a custom Python script, and accurately visualizing the results in Chimera. The guide emphasizes best practices for achieving reproducible, high-quality computational results, catering to the needs of computational chemists seeking detailed and objective-oriented methodologies.
Theoretical interpretation of Pass 8 Fermi-LAT $e^+ + e^-$ data
Creators: name: Di Mauro, Mattia
name: Manconi, Silvia
name: Vittino, Andrea
name: Donato, Fiorenza
name: Fornengo, Nicolao
name: Baldini, Luca
name: Bonino, Raffaella
name: Di Lalla, Nicolò
name: Latronico, Luca
name: Maldera, Simone
name: Manfreda, Alberto
name: Negro, Michela
name: Pesce-Rollins, Melissa
name: Sgrò, Carmelo
name: Spada, Francesca
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The flux of positrons and electrons ($e^+ + e^-$) has been measured by the $Fermi$ Large Area Telescope (LAT) in the energy range between 7 GeV and 2 TeV. We discuss a number of interpretations of Pass 8 $Fermi$-LAT $e^+ + e^-$ spectrum, combining electron and positron emission from supernova remnants (SNRs) and pulsar wind nebulae (PWNe), or produced by the collision of cosmic rays with the interstellar medium. We find that the $Fermi$-LAT spectrum is compatible with the sum of electrons from a smooth SNR population, positrons from cataloged PWNe, and a secondary component. If we include in our analysis constraints from AMS-02 positron spectrum, we obtain a slightly worse fit to the $e^+ + e^-$ $Fermi$-LAT spectrum, depending on the propagation model. As an additional scenario, we replace the smooth SNR component within 0.7 kpc with the { individual sources} found in Green's catalog of Galactic SNRs. We find that separate consideration of far and near sources helps to reproduce the $e^+ + e^-$ $Fermi$-LAT spectrum. However, we show that the fit degrades when the radio constraints on the positron emission from Vela SNR (which is the main contributor at high energies) are taken into account. We find that a break in the power-law injection spectrum at about 100 GeV can also reproduce the measured $e^+ + e^-$ spectrum} and, among the cosmic-ray propagation models that we consider, no reasonable break of the power-law dependence of the diffusion coefficient can modify the electron flux enough to reproduce the observed shape.
description: 15 pages, 12 figures. The Astrophysical Journal, Volume 845, Number 2
АНАЛИЗ ЭФФЕКТИВНОСТИ КОМПЛЕКСНОГО ЛЕЧЕНИЯ ХРОНИЧЕСКОГО РЕЦИДИВИРУЮЩЕГО ПАРОДОНТИТА НА ФОНЕ БРОНХИАЛЬНОЙ АСТМЫ.
Creators: name: Казакова, Нозима
name: Алавдинов, Салохидин
Publisher: name: Zenodo
Year: 2024

description: В ходе исследования были изучены результаты лечения общего состояния слизистой оболочки полости рта и индекса гигиены полости рта OHI-s (Oral Hygiene Indexes -упрощенный) у пациентов обеих групп.
title: Poetik der Übereinstimmung
title: Klassenbewusstsein und Ideologieaffirmation in Peter Weiss’ Die Ästhetik des Widerstands (1975–1981)
titleType: Subtitle
Creators: name: Widder, Roman
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: 830 Deutsche Literatur und Literaturen verwandter Sprachen

description: Dieser Beitrag ist mit Zustimmung des Rechteinhabers (De Gruyter) frei zugänglich.
description: This article treats the problem of ideology in Peter Weiss’s trilogy Die Ästhetik des Widerstands (1975–1981), examining the semantics of ›Übereinstimmung‹ as well as the theory of class consciousness in the novel. The semantics of ›Übereinstimmung‹ bridges the gap between two poetological stances of the author: the claim for documentation, on the one hand, and for radically subjective empathy or mimesis, on the other. The question of class consciousness as developed by Georg Lukács in Geschichte und Klassenbewusstsein (1921) marks the crucial theoretical context regarding the formal construction of the novel and its narrator. Thus, the poetics of ›Übereinstimmung‹ must be understood as the poetic solution to the problem of class consciousness that the novel confronts.
AN ANALYSIS ON SOCIAL STRATIFICATION AND DISCRIMINATION OF TRANSGENDERS IN INDIA: FOSTERING TOWARDS INCLUSIVITY
Creators: name: Serllyn Paul Engtipi
name: Shruti Singh
Publisher: name: Zenodo
Year: 2024
Subjects: Transgender, Cultural Marginalisation, İnclusivity, Social Stratification.

description: Abstract

In a society with social stratification, it is essential to embrace our differences. However, in India, transgender individuals face a dualistic perspective regarding their identity. On one hand, they are considered a disgraceful entity, while on the other hand, they are seen as "Shiva," a version of the Hindu God. Due to the fact that transgender individuals do not conform to one gender, they are often excluded and discriminated against in society. The objective of this paper is to shed light on the social and cultural marginalisation that the transgender community faces in India and to explore the impact of discrimination on their well-being. Furthermore, this paper suggests recommendations and presents a comprehensive overview of the current state of the community. Despite the government's efforts to foster inclusivity and provide assistance to transgenders, transforming societal attitudes is crucial for a brighter tomorrow. It may require patience, but it is an indispensable endeavour.
A cross-cultural study of architectural production in Korea and the West: cultural transfer within South Korean architecture and urbanism, 1990-2010
Creators: name: Jang, Junha
Publisher: name: University of Westminster
Year: 2013

description: This thesis examines the issue of cultural transfer within the context of modern Korean architecture and urbanism from 1990 to 2010 in light of globalising forces. My research is based on the proposition that the emergence of any new architecture in South Korea cannot be simply categorized according to the terms familiar in predominant western architectural theories and practices. To demonstrate this point, it investigates a range of contemporary Korean cultural conditions: hyper-digitisation of everyday life, prevalence of crowd-sourced popular culture, and a ‘bang’ entertainment room phenomenon for the collective enjoyment of leisure in dense urban sites. As a result, the thesis challenges the usual notion of a balanced exchange between the ‘foreign’ and the ‘local’ within the processes of globalisation, thereby disputing the idea of an easy mutual influence between different cultures. Instead, my study aims to build a critical method which can respond to complex issues of the transfer of cultural aspects, in regard not only to socio-political conditions but also to those of linguistic and cultural diversity. I also present through some outline design explorations a new framework through which to think about architectural and urban design in South Korea, and thus for understanding its appropriation within a broader, globalising cultural context. A key argument in my research is that just as increasing levels of economic, business, cultural and communication exchanges are now being developed between the two parts of Korea, so too large-scale architectural projects are required to create continuous urban projects predicated on innovative ‘themed’ socio-economic environments. This PhD study hence proposes a new mode of architectural and urban production that carries significance both as an experimental approach in general, and also one that can serve to guide future developments following the (hopeful) future reunification between North and South Korea.
The impact of transport infrastructure on the development of urban communities
Creators: name: Johnston, Glynis
Publisher: name: University of Westminster
Year: 2013

description: The objective of the research has been to study how the provision of transport infrastructure in an urban environment influences developers’ decisions at a local level. This entailed understanding the factors that might influence the choices that developers, land owners and potential users of the developments make and the influence that transport infrastructure has on those choices. The ultimate objective of the research has been to explore how the providers of the transport infrastructure can deliver maximum benefit to present and future local communities. The author chose to adopt a case study approach to her research as it involves direct contact with the wide range of stakeholders affected by the provision of transport infrastructure. A recent review of civil engineering research (EPSRC, 2009) stressed that human aspects and the relationship between people and infrastructure are important elements of the challenges faced, particularly those in sustainability and resilience. Three case study areas were chosen as examples of on-going regeneration projects. Two of these projects involve new transport infrastructure aimed at improving connectivity and accessibility and they provide illustrations of the impact that enhanced infrastructure has on the local community. Parallels are drawn with the relatively recently completed Jubilee Line Extension and its impacts. The literature review identified that further research was needed to find methods for mitigating negative impacts on the community of regeneration schemes especially in regard to transport infrastructure. The thesis uniquely explores these issues by using the concept of Power of Place, as originally described by Sir Neil Cossons (English Heritage, 2000), to demonstrate the importance of understanding the community value of place, and how it might be manifested in the regeneration process as an integral part of and successful delivery of transport and land use planning. Based on the literature review and the evidence obtained from the three case studies in this research a number of key drivers have been identified that are necessary for minimising the possible negative effects of regeneration projects. Collectively these drivers make up what Sir Neil Cossons termed Power of Place. Application of the concept, with its many facets, requires a multi-disciplinary approach and could aid in the creation of sustainable communities which have a sense of identity, a sense of belonging and sense of ownership
Normal forms of two-dimensional metrics admitting exactly one essential projective vector field
Creators: name: Manno, Gianni
name: Vollmer, Andreas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 53A20, 53A55, 53B10

description: We give a complete list of mutually non-diffeomorphic normal forms for the two-dimensional metrics that admit one essential (i.e., non-homothetic) projective vector field. This revises a result from the literature and extends the results of two papers, by R.L. Bryant & G. Manno & V.S. Matveev (2008) and V.S. Matveev (2012) respectively, solving a problem posed by Sophus Lie in 1882.
description: 47 pages, 4 figures
Peeling property and asymptotic symmetries with a cosmological constant
Creators: name: Saw, Vee-Liem
name: Thun, Freeman Chee Siong
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper establishes two things in an asymptotically (anti-)de Sitter spacetime, by direct computations in the physical spacetime (i.e. with no involvement of spacetime compactification): (1) The peeling property of the Weyl spinor is guaranteed. In the case where there are Maxwell fields present, the peeling properties of both Weyl and Maxwell spinors similarly hold, if the leading order term of the spin coefficient $ρ$ when expanded as inverse powers of $r$ (where $r$ is the usual spherical radial coordinate, and $r\rightarrow\infty$ is null infinity, $\mathcal{I}$) has coefficient $-1$. (2) In the absence of gravitational radiation (a conformally flat $\mathcal{I}$), the group of asymptotic symmetries is trivial, with no room for supertranslations.
description: 28 pages, two recent relevant references are included. Accepted for publication by International Journal of Modern Physics D
The core population and kinematics of a massive clump: an ALMA view of AG14.49
Creators: name: Redaelli, Elena
Publisher: name: Zenodo
Year: 2023

description: High-mass stars dominate the kinematics and energetics of the interstellar medium, and yet their initial stages are poorly known. In fact, high-mass stars are born in crowded, dense, and distant environments (infrared dark clouds) that pose significant observational challenges. In this work, we use a combination of several ALMA datasets to investigate the properties of the high-mass clump AG14.49, focusing on two aspects: the prestellar core population embedded in it and the clump-scale kinematics. By applying a dendrogram analysis to ALMA Band 7 data of oH2D+, we find 22 cores that are essentially low-mass and subvirial. Using Band 3 data of N2H+ (1-0) combined with a friend-of-friends algorithm to perform hierarchical clustering, we are able to dissect the complex 3D structure of this massive clump and to link kinematically the cores to their parental gas.
The Black Pirates of the Atlantic World, 1500-1730: Renegades or Revolutionaries?
Creators: name: Duffey, Garrentt
Publisher: name: Georgia State University
Year: 2023

description:
Black pirates played a significant role in the Atlantic World during the early modern period. On board pirate ships, black pirates were ready combatants, equal participants in voting, and joined in brotherhood with their comrades. Black pirates could even become quartermasters and captains. Becoming a pirate was one pathway for the enslaved to find freedom and agency in a world where the slave trade flourished. Some black pirates participated in the slave trade, showing that individual liberty topped black collective unity. Black women largely suffered at the hands of pirates, highlighting that the pirates life was a patriarchal one. Libertalia, the pirate community at Madagascar and St. Marys, served as a multiracial society black and white pirates thrived at, living together and expanding their legacy of tolerance for centuries onwards. Black pirates should not be forgotten, but remembered as revolutionaries, and highlighting agency instead of passivity.
Quasimomentum of an elementary excitation for a system of point bosons under zero boundary conditions
Creators: name: Tomchenko, Maksim D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: As is known, an elementary excitation of a many-particle system with boundaries is not characterized by a definite momentum. We obtain the formula for the quasimomentum of an elementary excitation for a one-dimensional system of $N$ spinless point bosons under zero boundary conditions (BCs). In this case, we use the Gaudin's solutions obtained with the help of the Bethe ansatz. We have also found the dispersion laws of the particle-like and hole-like excitations under zero BCs. They coincide with the known dispersion laws obtained for periodic BCs.
description: 7 pages, 1 figure, v5: accepted version
The Collapse of the Bison: Resolving the Debate
Creators: name: Williams, Roy
Publisher: name: Georgia State University
Year: 2023

description:
This thesis examines the 19th century collapse of the bison populations of North America. It discusses three prevalent (and occasionally overlapping) intellectual perspectives regarding the collapse of the bison: 1) the Native American perspective, 2) the environmental perspective, and 3) the market perspective.  A careful analysis of each school of thought, and the primary and secondary sources upon which they rely, suggest that the collapse of the bison was due to multiple causes. A chief reason that bison nearly went extinct in North America during the 19th century, however, is that the introduction of market capitalism to the Great Plains transformed the environment, and helped incentivize nomadic Native Americans to participate in the bisons near destruction.
Inauthentic Accuracy: Digital History In Videogames And The GamerGate Scandal
Creators: name: Gareis, O'Grady
Publisher: name: Georgia State University
Year: 2023

description:
In August 2014, a major scandal impacted the videogame industry and gaming journalism, which would become known as #GamerGate. Gaming journalists, specifically those identified as feminists, faced mass harassment from self-identified gamers. Four years later, the developer Creative Assembly would be the target of another wave of harassment for an update to their historical game Total War: Rome II, in which women became playable characters. This project explores the link between toxicity in gaming culture and Western historical concepts in historical video games, as well as how gaming culture in online discussion of Historical Strategy has changed since the initial GamerGate scandal.
Weighted sheaves and homology of Artin groups
Creators: name: Paolini, Giovanni
name: Salvetti, Mario
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Topology (math.AT)
subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 05E45, 20F36, 52C35

description: In this paper we expand the theory of weighted sheaves over posets, and use it to study the local homology of Artin groups. First, we use such theory to relate the homology of classical braid groups with the homology of certain independence complexes of graphs. Then, in the context of discrete Morse theory on weighted sheaves, we introduce a particular class of acyclic matchings. Explicit formulas for the homology of the corresponding Morse complexes are given, in terms of the ranks of the associated incidence matrices. We use such method to perform explicit computations for the new affine case $\tilde C_n$, as well as for the cases $A_n$, $B_n$ and $\tilde{A}_n$ (which were already done before by different methods).
Unveiling the interplay between magnetic fields and accretion in a young protocluster
Creators: name: Tabatabaei, Farideh S.
Publisher: name: Zenodo
Year: 2023

description: The Pipe Nebula and Barnard 59 The Pipe Nebula is one of the closest known star-forming regions, with a distance of d = 163 pc (Dzib et al. 2018). The Pipe cloud has a very low rate of star formation. Indeed, only one active star-forming clump, Barnard 59 (B59), has been found in the cloud (Brooke et al. 2007; Forbrich et al. 2009, 2010). Alves et al. (2008) and Franco et al. (2010) suggested that the fact that only B59 has been active in star formation might be linked to the different magnetic properties of the Pipe. Studies of the morphology of the magnetic field with optical polarimetric observation showed that the filamentary structure is threaded by a magnetic field, which is aligned perpendicular to the cloud’s axis, possibly preventing or delaying its global collapse.Magnetic field lines can be bent by gravitational pull and/or infalling material toward the core. In fact, the magnetic field lines in the filament located to the east of the core appear to show a sudden bent in their direction (from parallel to the filament spine to perpendicular to it) as they approach the main core.Our goal is to comprehensively understand the kinematics in the filament located east of the core in B59 and investigate its connection with magnetic field morphology. With the combined analysis of molecular line ( 13CO, C18O, 12CO all in (3-2)) data from JCMT and polarization data from Pico dos Dias Observatory we obtain a comprehensive understanding of the B59 cloud dynamical evolution.
Bubble phase at $ν=1/3$ for a spinless hollow-core interaction
Creators: name: Misguich, Grégoire
name: Jolicoeur, Thierry
name: Mizusaki, Takahiro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate fractional quantum Hall states for model interactions restricted to a repulsive hard-core. When the hard-core excludes relative angular momentum $m=1$ between spinless electrons the ground state at Landau level filling factor $ν=1/3$ is known to be exactly given by the Laughlin wavefunction. When we exclude relative angular momentum three only, Wòjs, Quinn and Yi have suggested the appearance of a liquid state with non-Laughlin correlations. We study this special hard-core interaction at filling factor 1/3 on the sphere, torus and cylinder geometry. An analysis of the charged and neutral gaps on the sphere geometry points to a gapless state. On the torus geometry the projected static structure factor has a two-peak feature pointing to one-dimensional density ordering. To clarify the nature of the ground state we perform extended DMRG studies on the cylinder geometry for up to 30 particles. The pair correlation function allows us to conclude that the ground state is a two-particle bubble phase.
description: Published version with DMRG study. Main conclusion unchanged, nature of ground state elucidated. 19 pages, 11 figures, 4 tables, coefficients for the polynomial at nu=1/5 are available by sending polite e-mail to the authors
Chinas Strategien für nachhaltige Entwicklung
Creators: name: WIEDENROTH/ISABEL
Publisher: name: Zenodo
Year: 2023
Subjects: China, Grüne Transformation, Nachhaltige Entwicklung

description: Im September 2021 kündigte Chinas Staatspräsident Xi Jinping bei seiner Rede vor der Generalversammlung der Vereinten Nationen an, dass China bis 2060 CO2-neutral werden solle. Laut dem Bericht auf dem 20. Parteitag der KP Chinas ist die Modernisierung chinesischer Prägung auch eine Lebensweise, in der Menschen und Natur harmonisch zusammenleben. Dies beruht auf dem naturphilosophischen Prinzip der Gegenseitigkeit, dem „Basisprinzip des Ökologischen“ (vgl. Wikipedia 2023). Daher wird China alle Anstrengungen unternehmen, um bis 2060 Klimaneutralität zu erreichen. Dennoch werden die CO2-Emissionen in China bis zum Ende des Jahrhunderts weiter jährlich steigen. Erst im Jahre 2030 soll der Höchststand erreicht sein (vgl. SCBD 2022:13). Die Umweltschützer von Green Peace reagieren mit Argwohn und fordern, dass China den Maximalausstoß früher erreichen solle. Dies scheint derzeit unrealistisch. „Basierend auf Chinas Energievorkommen werden wir uns anstrengen, den Peak planmäßig und schrittweise anzusteuern – dabei werden wir zuerst neue Technologien entwickeln, bevor wir die alten loswerden. Wir werden Kohle sauberer und effizienter nutzen, schnell ein neues Energiesystem aufbauen und uns aktiv an der weltweiten Klimaschutzpolitik beteiligen“ kündigte Chinas Parteichef Xi an. Während der Covid19-Pandemie hat China sich stark auf umweltbelastende Industrien gestützt. Auch fortgesetzte Investitionen in fossile Brennstoffe haben Chinas Engagement für eine nachhaltige Entwicklung in Frage gestellt. Um dies zu hinterfragen, sollten wir Chinas Strategien für nachhaltige Entwicklung genauer ansehen.
Cautious Model Predictive Control using Gaussian Process Regression
Creators: name: Hewing, Lukas
name: Kabzan, Juraj
name: Zeilinger, Melanie N.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Gaussian process (GP) regression has been widely used in supervised machine learning due to its flexibility and inherent ability to describe uncertainty in function estimation. In the context of control, it is seeing increasing use for modeling of nonlinear dynamical systems from data, as it allows the direct assessment of residual model uncertainty. We present a model predictive control (MPC) approach that integrates a nominal system with an additive nonlinear part of the dynamics modeled as a GP. Approximation techniques for propagating the state distribution are reviewed and we describe a principled way of formulating the chance constrained MPC problem, which takes into account residual uncertainties provided by the GP model to enable cautious control. Using additional approximations for efficient computation, we finally demonstrate the approach in a simulation example, as well as in a hardware implementation for autonomous racing of remote controlled race cars, highlighting improvements with regard to both performance and safety over a nominal controller.
description: Published in IEEE Transactions on Control Systems Technology
On Multivariate Matsaev's Conjecture
Creators: name: Ray, Samya Kumar
Publisher: name: arXiv
Year: 2017
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: In this article, we study multivariate generalizations of the Matsaev's conjecture in commutative and non-commutative $L^p$-spaces.We prove that the multivariate analogue of Matsaev's conjecture is eventually false for all $1
description: 19 pages. This is well-written version and many corrections have been made. Commutativity of the unitary operators in the dilation theorem is explained
Kähler-Ricci flow on homogeneous toric bundles
Creators: name: Huang, Hong
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Assume that $X$ is a homogeneous toric bundle of the form $G^{\mathbb{C}}\times_{P,τ} F$ and is Fano, where $G$ is a compact semisimple Lie group with complexification $G^\mathbb{C}$, $P$ a parabolic subgroup of $G^\mathbb{C}$, $τ:P\rightarrow (T^m)^\mathbb{C}$ is a surjective homomorphism from $P$ to the algebraic torus $(T^m)^\mathbb{C}$, and $F$ is a compact toric manifold of complex dimension $m$. In this note we show that the normalized Kähler-Ricci flow on $X$ with a $G\times T^m$-invariant initial Kähler form in $c_1(X)$ converges, modulo the algebraic torus action, to a Kähler-Ricci soliton. This extends a previous work of X. H. Zhu. As a consequence we recover a result of Podestà-Spiro.
description: to appear in International Journal of Mathematics
Extended symmetry analysis of isothermal no-slip drift flux model
Creators: name: Opanasenko, Stanislav
name: Bihlo, Alexander
name: Popovych, Roman O.
name: Sergyeyev, Artur
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 76M60 (Primary) 37K05, 35B06, 35C05 (Secondary)

description: We perform extended group analysis for a system of differential equations modeling an isothermal no-slip drift flux. The maximal Lie invariance algebra of this system is proved to be infinite-dimensional. We also find the complete point symmetry group of this system, including discrete symmetries, using the megaideal-based version of the algebraic method. Optimal lists of one- and two-dimensional subalgebras of the maximal Lie invariance algebra in question are constructed and employed for obtaining reductions of the system under study. Since this system contains a subsystem of two equations that involves only two of three dependent variables, we also perform group analysis of this subsystem. The latter can be linearized by a composition of a fiber-preserving point transformation with a two-dimensional hodograph transformation to the Klein-Gordon equation. We also employ both the linearization and the generalized hodograph method for constructing the general solution of the entire system under study. We find inter alia genuinely generalized symmetries for this system and present the connection between them and the Lie symmetries of the subsystem we mentioned earlier. Hydrodynamic conservation laws and their generalizations are also constructed.
description: 29 pages, minor corrections
Frank Lloyd Wright beyond America
Creators: name: Jones, Gwyn
Publisher: name: University of Westminster
Year: 2013

description: This thesis is a cultural study of the architecture of Frank Lloyd Wright’s (1867-1959) beyond his homeland of America. It explores Wright’s travels as a means of unravelling his global ambitions and legacy. Wright was born in the age of the horse and cart and died in the age of commercial jet travel; he not only experienced the rapid compression of space and time in methods of travel, but also participated in this globalising movement. His journeys beyond the USA were undertaken to promote his own global philosophy of ‘organic architecture’. Such cross-cultural dialogues are an important part of architectural history and theory, as well as of notions of ‘change’ and ‘progress’, and so within the thesis I re-enact six of Wright’s journeys to these different sites. In addition, I also rethink the traditional academic division of Wright’s career into his ‘Prairie House’ and ‘Usonian’ eras by proposing a third, final epoch constructed around his ‘Legacy’. My methodology for the thesis is based on the concept of gaining ‘situated knowledge’ from direct engagement with ‘Wrightian’ sites to deconstruct his ideas and projects. I also consider how Wright’s global 'organic' doctrine is actually now being experienced, and how people are living with his legacy in the early twenty-first century. The thesis adopts an experimental writing-as-design approach to research and as such I use a narrative mode of writing to negotiate between ‘creative’ and ‘critical’ perspectives of research. This method allows my experience to inform my analysis of Wright’s sites of influence to generate a better understanding of his architecture. Consequently, my layered narrative provides an alternative reading of Frank Lloyd Wright’s globalising ambitions by offsetting with tales of contemporary resistance that reclaim the term ‘organic architecture’ from being a bland global phenomenon to a highly articulated local expression of difference.
Stable conjugacy and epipelagic L-packets for Brylinski-Deligne covers of Sp(2n)
Creators: name: Li, Wen-Wei
Publisher: name: arXiv
Year: 2017
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 22E50 (Primary) 11F27 (Secondary)

description: Let $F$ be a local field of characteristic not $2$. We propose a definition of stable conjugacy for all the covering groups of $\mathrm{Sp}(2n,F)$ constructed by Brylinski and Deligne, whose degree we denote by $m$. To support this notion, we follow Kaletha's approach to construct genuine epipelagic $L$-packets for such covers in the non-archimedean case with $p \nmid 2m$, or some weaker variant when $4 \mid m$; we also prove the stability of packets when $F \supset \mathbb{Q}_p$ with $p$ large. When $m=2$, the stable conjugacy reduces to that defined by J. Adams, and the epipelagic $L$-packets coincide with those obtained by $Θ$-correspondence. This fits within Weissman's formalism of L-groups. For $n=1$ and $m$ even, it is also compatible with the transfer factors proposed by K. Hiraga and T. Ikeda.
description: 92 pages, with an index. The new Section 10 is the Errata that fixes the mistakes in Sections 7.2 and 8.3 in the published version
Acceleration of Convergence of Some Infinite Sequences $\boldsymbol{\{A_n\}}$ Whose Asymptotic Expansions Involve Fractional Powers of $\boldsymbol{n}$ via the $\tilde{d}^{(m)}$ transformation
Creators: name: Sidi, Avram
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65B05, 65B010, 40A05, 40A25, 40A20

description: In this paper, we discuss the application of the author's $\tilde{d}^{(m)}$ transformation to accelerate the convergence of infinite series $\sum^\infty_{n=1}a_n$ when the terms $a_n$ have asymptotic expansions that can be expressed in the form $$ a_n\sim(n!)^{s/m}\exp\left[\sum^{m}_{i=0}q_in^{i/m}\right]\sum^\infty_{i=0}w_i n^{γ-i/m}\quad\text{as $n\to\infty$},\quad s\ \text{integer.}$$ We discuss the implementation of the $\tilde{d}^{(m)}$ transformation via the recursive W-algorithm of the author. We show how to apply this transformation and how to assess in a reliable way the accuracies of the approximations it produces, whether the series converge or they diverge. We classify the different cases that exhibit unique numerical stability issues in floating-point arithmetic. We show that the $\tilde{d}^{(m)}$ transformation can also be used efficiently to accelerate the convergence of infinite products $\prod^\infty_{n=1}(1+v_n)$, where $v_n\sim \sum^\infty_{i=0}e_in^{-t/m-i/m}$ as $n\to\infty$,\ $t\geq m+1$ an integer. Finally, we give several numerical examples that attest the high efficiency of the $\tilde{d}^{(m)}$ transformation for the different cases.