cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Neutrophil Migration and Signaling in Response to Tumor-Secreted Factors From Breast Cancer Cells
Creators: name: Hein, Lauren
Publisher: name: My University
Year: 2023
Subjects: subject: cancer biology
subject: neutrophils
subject: neutrophil migration
subject: TGF-b
subject: breast cancer
subject: Microbiology and Immunology
subject: Molecular, Cellular and Developmental Biology
subject: Health Sciences

description: Neutrophils are a critical component of the immune system, and they are the first line of defense against injury or infection. However, their recruitment to tumor sites has been linked to poor prognosis and tumor progression. It is therefore essential to gain a thorough understanding of the mechanisms that underlie their migration to the tumor niche. This dissertation investigates the impact of cancer cell secreted factors on neutrophil signaling and migration. Chapter 2 characterizes the neutrophil recruitment ability of breast cancer cell lines, revealing a positive correlation between the aggressiveness of cancer cells and the recruitment of neutrophils to tumor-secreted factors. This correlation was further confirmed using a real-time imaging assay, which shows that neutrophils migrate preferentially toward malignant spheroids as opposed to less aggressive ones. Chapter 3 details the quantification of this neutrophil-spheroid coculture assay. Moreover, we identified the key factors that are secreted from aggressive cancer cells, with CXCR2 ligands and TGF-b1 being secreted at particularly high levels. Our experiments demonstrate that migration toward tumor-conditioned media (TCM) is reduced when both CXCR2 and TGF-b signaling pathways are blocked, suggesting that TGF-b1 and CXCR2 ligands work in concert to recruit neutrophils. Chapter 4 of this dissertation investigates the contribution of TGF-b to neutrophil migration. We found that TGF-b1 does not induce migration of primary neutrophils or the neutrophil-like cell line dHL-60, but it does signal canonically through SMAD3 and noncanonically through ERK1/2 in neutrophils. Furthermore, TCM activates both SMAD3 and ERK1/2, and SMAD3 phosphorylation is due to the TGF-b present in the TCM. Because neutrophils can amplify migration signals by releasing the chemoattractant leukotriene B4 (LTB4), we also investigated whether TGF-b1 can induce the secretion of LTB4. While no individual component prevalent in the TCM, such as CXCL1, TGF-b1, or IL-8, can induce LTB4 secretion alone, TCM from the aggressive breast cancer cell line M4 does induce neutrophils to secrete LTB4. However, blocking CXCR2 and the production of LTB4 results in decreased neutrophil migration to M4 TCM. Moreover, bulk RNA-sequencing analysis of dHL-60 cells treated with TGF-b1 or TCM revealed that two pro-tumor genes are upregulated, but no increase in migration-related gene expression was observed. In summary, this dissertation provides novel insights into neutrophil migration in response to breast tumor-secreted factors and characterizes the effects of TGF-b1 on signaling and migration of neutrophils.
Review Bombing's Effect on Weekly Concurrent Players in Steam Games
Creators: name: Frank, Andre
Publisher: name: Zenodo
Year: 2020
Subjects: steam
gaming
time series

description: A time series analysis project done in Python that investigates the effect of "review bombing" (a sudden, large influx of negative reviews) on player base of video games on the Steam store. Found a significant negative short-term impact on player numbers.
Synthesis, characterization and in vitro evaluation of substituted N-(2-phenylcyclopropyl)carbamates as acetyl- and butyrylcholinesterase inhibitors
Creators: name: Horáková, Eva
name: Drabina, Pavel
name: Břetislav Brož
name: Šárka Štěpánková
name: Vorčáková, Katarína
name: Královec, Karel
name: Havelek, Radim
name: Miloš Sedlák
Publisher: name: Figshare
Year: 2016
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: A serie of O-substituted N-2-phenylcyclopropylcarbamates was prepared and characterized. These carbamates were tested as inhibitors of acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). It was found, that these compounds exhibit moderate inhibition activity with values of IC50 in the range of 54.8–94.4 μM (for AChE) and up to 5.8 μM (for BChE). The AChE/BChE selectivity for each carbamate was calculated. These values varied from 0.50 to 9.46, two carbamate derivatives inhibited only AChE selectively. The most promising derivative was prepared in all optically pure forms (four isomers). It was found that individual stereoisomers differed only slightly in the inhibition ability. The cytotoxicity of all carbamates was evaluated using the standard in vitro test with Jurkat cells. With regard to their inhibition activity and cytotoxicity as well as easy preparation, O-substituted N-2-phenylcyclopropylcarbamates can be considered as promising compounds for potential medicinal applications.
Great Britain Ministry of Information – Daily Press Notices and Bulletins (1944-09-15)
Creators: name: Great Britain. Ministry Of Information.
Publisher: name: The University of Texas at Austin
Year: 1944
Subjects: World War, 1939-1945 – Social aspects
World War, 1939-1945 -- History
World War II
Second World War
World War Two
Great Britain

description: From the UK National Archives: http://www.nationalarchives.gov.uk/theartofwar/inf3.htm “Formed on September 4th 1939, the day after Britain’s declaration of war, the Ministry of Information (MOI) was the central government department responsible for publicity and propaganda in the Second World War. The initial functions of the MOI were threefold: news and press censorship; home publicity; and oversees publicity in Allied and neutral countries”. This collection contains Press Notices and Bulletins published by the MOI between 1939-1945. The Press Notices and Bulletins are among many publications and films issued by the agency during the war.
Gravitationally Generated Interactions
Creators: name: Capozziello, Salvatore
name: De Laurentis, Mariafelicia
name: Fabbri, Luca
name: Vignolo, Stefano
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Starting from a 5D-Riemannian manifold, we show that a reduction mechanism to 4D-spacetimes reproduces Extended Theories of Gravity (ETGs) that are direct generalizations of Einstein's gravity. In this context, the gravitational degrees of freedom can be dealt under the standard of spacetime deformations. Besides, such deformations can be related to the mass spectra of particles. The intrinsic non-linearity of ETGs gives an energy-dependent running coupling, while torsion gives rise to interactions among spinors displaying the structure of the weak forces among fermions. We discuss how this scheme is compatible with the known observational evidence and suggest that eventual discrepancies could be detected in experiments, as ATLAS and CMS, today running at LHC (CERN). We finally discuss the consequences of the present approach in view of unification of physical interactions.
description: 23 pages. arXiv admin note: substantial text overlap with arXiv:1105.6193 and with arXiv:1012.5529 by other author
The Magic of Logical Inference in Probabilistic Programming
Creators: name: Gutmann, Bernd
name: Thon, Ingo
name: Kimmig, Angelika
name: Bruynooghe, Maurice
name: De Raedt, Luc
Publisher: name: arXiv
Year: 2011
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: D.1.6

description: Today, many different probabilistic programming languages exist and even more inference mechanisms for these languages. Still, most logic programming based languages use backward reasoning based on SLD resolution for inference. While these methods are typically computationally efficient, they often can neither handle infinite and/or continuous distributions, nor evidence. To overcome these limitations, we introduce distributional clauses, a variation and extension of Sato's distribution semantics. We also contribute a novel approximate inference method that integrates forward reasoning with importance sampling, a well-known technique for probabilistic inference. To achieve efficiency, we integrate two logic programming techniques to direct forward sampling. Magic sets are used to focus on relevant parts of the program, while the integration of backward reasoning allows one to identify and avoid regions of the sample space that are inconsistent with the evidence.
description: 17 pages, 2 figures, International Conference on Logic Programming (ICLP 2011)
Variation of Area-to-Mass-Ratio of HAMR Space Debris Objects
Creators: name: Früh, Carolin
name: Schildknecht, Thomas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences
subject: 70F15

description: An unexpected space debris population has been detected in 2004 Schildknecht et al. (2003, 2004) with the unique properties of a very high area-to-mass ratio (HAMR) Schildknecht et al. (2005a). Ever since it has been tried to investigate the dynamical properties of those objects further. The orbits of those objects are heavily perturbed by the effect of direct radiation pressure. Unknown attitude motion complicates orbit prediction. The area-to-mass ratio of the objects seems to be not stable over time. Only sparse optical data is available for those objects in drift orbits. The current work uses optical observations of five HAMR objects, observed over several years and investigates the variation of their area-to-mass ratio and orbital parameters. A normalized orbit determination setup has been established and validated with two low and two of the high ratio objects, to ensure, that comparable orbits over longer time spans are determined even with sparse optical data.
description: 10 pages, accepted Monthly Notices of Royal Astronomical Society, MN-11-1785-MJ.R1, The definitive version is available at www.blackwell-synergy.com
Measurement of CP--violating asymmetries in D0 --> pi+ pi- and D0 --> K+K- decays at CDF
Creators: name: CDF Collaboration
name: Aaltonen, T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report on a measurement of CP-violating asymmetries (Acp) in the Cabibbo-suppressed D0 --> pi+ pi- and D0 --> K+K- decays reconstructed in a data sample corresponding to 5.9 fb-1 of integrated luminosity collected by the upgraded Collider Detector at Fermilab. We use the strong decay D*+ --> D0 pi+ to identify the flavor of the charmed meson at production and exploit CP-conserving strong c-cbar pair-production in p-pbar collisions. High-statistics samples of Cabibbo-favored D0 --> K- p+ decays with and without a D* tag are used to correct for instrumental effects and significantly reduce systematic uncertainties. We measure Acp(D0 --> pi+ pi-) = (+0.22 +- 0.24 (stat) +- 0.11 (syst))% and Acp(D 0 --> K+ K-) = (-0.24 +- 0.22 (stat) +- 0.09 (syst))%, in agreement with CP conservation. These are the most precise determinations from a single experiment to date. Under the assumption of negligible direct CP violation in D0 --> pi+ pi- and D0 --> K+K- decays, the results provide an upper limit to the CP-violating asymmetry in D0 mixing, |Acp^{ind}(D0)|< 0.13% at the 90% confidence level.
description: 29 pages, 20 figures, 3 tables. Submitted to Phys. Rev. D
Great Britain Ministry of Information – Daily Press Notices and Bulletins (1944-09-16)
Creators: name: Great Britain. Ministry Of Information.
Publisher: name: The University of Texas at Austin
Year: 1944
Subjects: World War, 1939-1945 – Social aspects
World War, 1939-1945 -- History
World War II
Second World War
World War Two
Great Britain

description: From the UK National Archives: http://www.nationalarchives.gov.uk/theartofwar/inf3.htm “Formed on September 4th 1939, the day after Britain’s declaration of war, the Ministry of Information (MOI) was the central government department responsible for publicity and propaganda in the Second World War. The initial functions of the MOI were threefold: news and press censorship; home publicity; and oversees publicity in Allied and neutral countries”. This collection contains Press Notices and Bulletins published by the MOI between 1939-1945. The Press Notices and Bulletins are among many publications and films issued by the agency during the war.
Teachers' perceptions of media education in BC secondary schools : challenges and possibilities
Creators: name: Namita, Yoko
Publisher: name: University of British Columbia
Year: 2010

description: The inclusion of media education and integration of media literacy into the K-12 school curriculum is seemingly well established in Canada. Despite successes, media education does not yet have widespread acceptance. For example, in British Columbia (BC), research suggests that media education has not been significantly implemented into the curriculum. In order to identify a baseline and the challenges that media education faces, this research focused on a case study of Lower Mainland, BC secondary schools in order to understand the implementation of media education. One notable challenge is a lack of research on this topic; this dissertation contributes to knowledge of teachers’ perspectives on or perceptions of media education and literacy. The case study includes five data sources and an analysis of texts. The data sources include: Pre-service teachers (n=42), In-service teachers (n=24), English and Social Studies teachers (n=17), Department heads (n=4), and teachers experienced in media education (n=4). The research addressed four questions. First, what are in-service and pre-service teachers’ perceptions of media literacy? Second, what is the current status of media education? Third, what kind of support is available for media education or for teachers to integrate media literacy into classroom instruction? Fourth, what are the obstacles and challenges that teachers encounter when teaching about the media? Findings from this case study suggest that media education is only partially included in the secondary school curriculum in Lower Mainland schools. In this case, media literacy is also hit or miss, and depends on teachers’ interests and time made available to address topics that fall outside of the conventional English and Social Studies curriculum. Experienced teachers manage to find their own ways and means for media education practice, but for other teachers, immense challenges and obstacles prevent even a recognition of the importance of media education and literacy. A lack of teacher awareness of existing resources compounds the challenges, and opportunities for professional development are limited in BC. In summary, the recognition of media literacy’s importance does not in this case necessarily transfer to media education in practice.
Great Britain Ministry of Information – Daily Press Notices and Bulletins (1944-09-17)
Creators: name: Great Britain. Ministry Of Information.
Publisher: name: The University of Texas at Austin
Year: 1944
Subjects: World War, 1939-1945 – Social aspects
World War, 1939-1945 -- History
World War II
Second World War
World War Two
Great Britain

description: From the UK National Archives: http://www.nationalarchives.gov.uk/theartofwar/inf3.htm “Formed on September 4th 1939, the day after Britain’s declaration of war, the Ministry of Information (MOI) was the central government department responsible for publicity and propaganda in the Second World War. The initial functions of the MOI were threefold: news and press censorship; home publicity; and oversees publicity in Allied and neutral countries”. This collection contains Press Notices and Bulletins published by the MOI between 1939-1945. The Press Notices and Bulletins are among many publications and films issued by the agency during the war.
Great Britain Ministry of Information – Daily Press Notices and Bulletins (1944-09-18)
Creators: name: Great Britain. Ministry Of Information.
Publisher: name: The University of Texas at Austin
Year: 1944
Subjects: World War, 1939-1945 – Social aspects
World War, 1939-1945 -- History
World War II
Second World War
World War Two
Great Britain

description: From the UK National Archives: http://www.nationalarchives.gov.uk/theartofwar/inf3.htm “Formed on September 4th 1939, the day after Britain’s declaration of war, the Ministry of Information (MOI) was the central government department responsible for publicity and propaganda in the Second World War. The initial functions of the MOI were threefold: news and press censorship; home publicity; and oversees publicity in Allied and neutral countries”. This collection contains Press Notices and Bulletins published by the MOI between 1939-1945. The Press Notices and Bulletins are among many publications and films issued by the agency during the war.
Great Britain Ministry of Information – Daily Press Notices and Bulletins (1944-09-19)
Creators: name: Great Britain. Ministry Of Information.
Publisher: name: The University of Texas at Austin
Year: 1944
Subjects: World War, 1939-1945 – Social aspects
World War, 1939-1945 -- History
World War II
Second World War
World War Two
Great Britain

description: From the UK National Archives: http://www.nationalarchives.gov.uk/theartofwar/inf3.htm “Formed on September 4th 1939, the day after Britain’s declaration of war, the Ministry of Information (MOI) was the central government department responsible for publicity and propaganda in the Second World War. The initial functions of the MOI were threefold: news and press censorship; home publicity; and oversees publicity in Allied and neutral countries”. This collection contains Press Notices and Bulletins published by the MOI between 1939-1945. The Press Notices and Bulletins are among many publications and films issued by the agency during the war.
MPEC 2023-M161 : 2023 MQ5
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 MQ5

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
title: Implementing a Project-based approach on Arabic Heritage Language Learners: Creativity, Motivation, Learner agency and Identity
Creators: name: Khaled, Fatima
Publisher: name: The Open University
Year: 2024

description: As an educator with over 19 years of experience teaching Arabic, and the headteacher of a supplementary school known as the Peace School, where Arabic is taught, a persistent challenge is engaging young bilingual heritage learners in continuing their Arabic studies. While project-based learning has been shown to have a positive impact on language acquisition, there is limited research on the experiences of bilingual heritage learners studying their heritage language within a predominantly monolingual educational system. This thesis employs a case study methodology to investigate the experiences of young heritage language learners using MDST as an innovative project-based approach in a heritage language classroom. The research examines the extent to which this pedagogical approach influences their motivation, learner agency, and identity. Seventeen students, aged 12 to 16, studying Arabic at the Peace School, participated in the study through observations, individual interviews, and the analysis of artefacts. The study aims to explore the students' experiences and developments in motivation, learner agency, and identity through the implementation of MDST as a project-based learning strategy.
It was found that as a result of project-based learning (PBL), participants developed their confidence which in turn positively impacted their agency and motivation. Another key finding was the significant role of PBL in instilling a feeling of belonging and supporting heritage learners to access and express parts of their identity and sense of self by drawing upon their creativity and personal experiences within a safe space. 
The research has implications for policy development in identifying the importance of accommodating for heritage learners and for tailoring a curriculum which targets their needs and motivates them to explore their identity and learn the heritage language.
Search for Dark Matter in the Sun with the ANTARES Neutrino Telescope in the CMSSM and mUED frameworks
Creators: name: Zornoza, J. D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: ANTARES is the first neutrino telescope in the sea. It consists of a three-dimensional array of 885 photomultipliers to collect the Cherenkov light induced by relativistic muons produced in CC interactions of high energy neutrinos. One of the main scientific goals of the experiment is the search for dark matter. We present here the analysis of data taken during 2007 and 2008 to look for a WIMP signal in the Sun. WIMPs are one of the most popular scenarios to explain the dark matter content of the Universe. They would accumulate in massive objects like the Sun or the Galactic Center and their self-annihilation would produce (directly or indirectly) high energy neutrinos detectable by neutrino telescopes. Contrary to other indirect searches (like with gamma rays or positrons), the search for neutrinos in the Sun is free from other astrophysical contributions, so the interpretation of a potential signal in terms of dark matter is much more robust.
description: Proc. of VLVNT 2011 sent to NIM A on behalf of the ANTARES collaboration
title: Besondere Bestimmungen der Prüfungsordnung für den Bachelorstudiengang Lehramt für sonderpädagogische Förderung mit dem Lernbereich Sprachliche Grundbildung an der Universität Paderborn : vom 22. Juli 2016
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2016
Subjects: subject: Sozialwissenschaften
subject: Bildung und Erziehung
subject: Hochschulbildung

description: Amtliche Mitteilungen / Universität Paderborn
Examining culturally responsive education in the context of an elementary school science unit
Creators: name: Van Ooyen, Heather
Publisher: name: University of British Columbia
Year: 2010

description: This study is a reflective examination of my practice as an educator in which I explore how aspects of culturally responsive curriculum and pedagogy are enacted in the classroom. Specifically, it is the story of how I endeavored to make sense of the pedagogical decisions and actions that I made while preparing and teaching a science unit in my grade two classroom. I examine the ways in which I held high expectations for each student, developed learning activities that were meaningful, relevant, useful and important to each student, valued and built upon the students’ strengths, incorporated community interests and social justice, and built reciprocal relationships with the students and their families. I also examine how my thinking and knowledge was enriched and deepened by the experience of intentionally taking up cultural responsiveness as something I wanted not only to enact, but also study. The main data source for this study was a research journal. Other sources of data included samples of newsletters, blog posts and instructional planning notes as well as a parent/guardian questionnaire, transcripts from a student feedback session and samples of student work. A detailed, thick description and analysis with direct quotations captures my own perspective and experience as a teacher, as well as that of my students and their families.
New instability for rotating black branes and strings
Creators: name: Cardoso, Vitor
name: Lemos, José P. S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The evolution of small perturbations around rotating black branes and strings, which are low energy solutions of string theory, are investigated. For simplicity, we concentrate on the Kerr solution times transverse flat extra dimensions, possibly compactified, but one can also treat other branes composed of any rotating black hole and extra transverse dimensions, as well as analogue black hole models and rotating bodies in fluid mechanics systems. It is shown that such a rotating black brane is unstable against any massless (scalar, vectorial, tensorial or other) field perturbation for a wide range of wavelengths and frequencies in the transverse dimensions. Since it holds for any massless field it can be considered, in this sense, a stronger instability than the one studied by Gregory and Laflamme. Accordingly, it has also a totally different physical origin. The perturbations can be stabilized if the extra dimensions are compactified to a length smaller than the minimum wavelength for which the instability settles in, resembling in this connection the Gregory-Laflamme case. Likewise, this instability will have no effect for astrophysical black holes. However, in the large extra dimensions scenario, where TeV scale black holes can be produced, this instability should be important. It seems plausible that the endpoint of this instability is a static, or very slowly rotating, black brane and some outgoing radiation at infinity.
description: 4 pages, ReVTeX4. v2: minor improvements
Managing Chronic Health Conditions with Limited Resources
Creators: name: DeRoos, Luke
Publisher: name: My University
Year: 2023
Subjects: subject: optimization
subject: health care
subject: chronic disease
subject: Markov decision process
subject: simulation
subject: Industrial and Operations Engineering
subject: Engineering

description: In this work, we aim to help patients and providers manage chronic health conditions using operations research. Providing quality care to patients means managing limited resources, including time, money, and medication. We explore two approaches to minimize the burden of resource scarcity on patient outcomes: 1) reducing resource demand and 2) increasing resource availability. First, we focus on reducing resource demand by optimizing the treatment regimen required to prevent disease progression. We provide a means of finding the optimal treatment interval for a patient in order to minimize the number of treatments and clinic visits without compromising patient health. We then provide a framework for optimizing the treatment of multiple chronic conditions and describe when it is optimal to synchronize treatment across conditions. We highlight the usefulness of these treatment planning models using a case study on patients with neovascular age-related macular degeneration, a chronic eye disease. Second, we seek to maximize the availability of chronic disease treatment in situations where patients face resource scarcity, such as in the case of organ transplantation. For patients on the transplant waiting list, the need for transplants far outpaces donation rates. We describe two polices designed to improve patient outcomes by increasing donation rates. We believe this work offers both theoretical and practical value to the field of healthcare operations research. By making chronic disease treatment more efficient and more readily available, we hope that the decision policies presented here drive meaningful change and make a lasting difference in the lives of patients.
Charge and spin collective modes in a quasi-1D model of Sr2RuO4
Creators: name: Chung, Suk Bum
name: Raghu, Srinivas
name: Kapitulnik, Aharon
name: Kivelson, Steven A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Given that Sr2RuO4 is a two-component p-wave superconductor, there exists the possibility of well defined collective modes corresponding to fluctuations of the relative phase and spin-orientation of the two components of the order parameter. We demonstrate that at temperatures much below Tc, these modes have energies small compared to the pairing gap scale if the superconductivity arises primarily from the quasi 1D (dxz and dyz) bands, while it is known that their energies become comparable to the pairing gap scale if there is a substantial involvement of the quasi 2D (dxy) band. Therefore, the orbital origin of the superconductivity can be determined by measuring the energies of these collective modes.
description: 11 pages (6 pages for main text), 2 figures
23rd International Symposium of the International Scientific Centre of Fertilizers Plant nutrition and fertilizer issues for the cold climates, Son (Norway), September 8-10, 2015
Creators: name: Haneklaus, Silvia
name: Lombnæs, Peder
name: Schnug, Ewald
Publisher: name: Julius Kühn-Institut
Year: 2016

description: Berichte aus dem Julius Kühn-Institut 184
Reduced density matrix hybrid approach: Application to electronic energy transfer
Creators: name: Berkelbach, Timothy C.
name: Markland, Thomas E.
name: Reichman, David R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Electronic energy transfer in the condensed phase, such as that occurring in photosynthetic complexes, frequently occurs in regimes where the energy scales of the system and environment are similar. This situation provides a challenge to theoretical investigation since most approaches are accurate only when a certain energetic parameter is small compared to others in the problem. Here we show that in these difficult regimes, the Ehrenfest approach provides a good starting point for a dynamical description of the energy transfer process due to its ability to accurately treat coupling to slow environmental modes. To further improve on the accuracy of the Ehrenfest approach, we use our reduced density matrix hybrid framework to treat the faster environmental modes quantum mechanically, at the level of a perturbative master equation. This combined approach is shown to provide an efficient and quantitative description of electronic energy transfer in a model dimer and the Fenna-Matthews-Olson complex and is used to investigate the effect of environmental preparation on the resulting dynamics.
description: 11 pages, 8 figures
Adaptation of the Landau-Migdal Quasiparticle Pattern to Strongly Correlated Fermi Systems
Creators: name: Khodel, V. A.
name: Clark, J. W.
name: Zverev, M. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A quasiparticle pattern advanced in Landau's first article on Fermi liquid theory is adapted to elucidate the properties of a class of strongly correlated Fermi systems characterized by a Lifshitz phase diagram featuring a quantum critical point (QCP) where the density of states diverges. The necessary condition for stability of the Landau Fermi Liquid state is shown to break down in such systems, triggering a cascade of topological phase transitions that lead, without symmetry violation, to states with multi-connected Fermi surfaces. The end point of this evolution is found to be an exceptional state whose spectrum of single-particle excitations exhibits a completely flat portion at zero temperature. Analysis of the evolution of the temperature dependence of the single-particle spectrum yields results that provide a natural explanation of classical behavior of this class of Fermi systems in the QCP region.
description: 26 pages, 14 figures. Dedicated to 100th anniversary of A.B.Migdal birthday
Spontaneous Coherence in a Cold Exciton Gas
Creators: name: High, Alexander A.
name: Leonard, Jason R.
name: Hammack, Aaron T.
name: Fogler, Michael M.
name: Butov, Leonid V.
name: Kavokin, Alexey V.
name: Campman, Kenneth L.
name: Gossard, Arthur C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Excitons, bound pairs of electrons and holes, form a model system to explore the quantum physics of cold bosons in solids. Cold exciton gases can be realized in a system of indirect excitons, which can cool down below the temperature of quantum degeneracy due to their long lifetimes. Here, we report on the measurement of spontaneous coherence in a gas of indirect excitons. We found that extended spontaneous coherence of excitons emerges in the region of the macroscopically ordered exciton state and in the region of vortices of linear polarization. The coherence length in these regions is much larger than in a classical gas, indicating a coherent state with a much narrower than classical exciton distribution in momentum space, characteristic of a condensate. We also observed phase singularities in the coherent exciton gas. Extended spontaneous coherence and phase singularities emerge when the exciton gas is cooled below a few Kelvin.
description: Main Text and Supporting Material
Efficient generation of single and entangled photons on a silicon photonic integrated chip
Creators: name: Mower, Jacob
name: Englund, Dirk
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a protocol for generating on-demand, indistinguishable single photons on a silicon photonic integrated chip. The source is a time-multiplexed spontaneous parametric down-conversion element that allows optimization of single-photon versus multiphoton emission while realizing high output rate and indistinguishability. We minimize both the scaling of active elements and the scaling of active element loss with multiplexing. We then discuss detection strategies and data processing to further optimize the procedure. We simulate an improvement in single-photon-generation efficiency over previous time-multiplexing protocols, assuming existing fabrication capabilities. We then apply this system to generate heralded Bell states. The generation efficiency of both nonclassical states could be increased substantially with improved fabrication procedures.
description: 7 pages, 4 figures
Magnetized Kelvin-Helmholtz instability in the presence of a radiation field
Creators: name: Shadmehri, Mohsen
name: Enayati, Zahra
name: Khajavi, Mahdi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The purpose of this study is to analyze the dynamical role of a radiation field on the growth rate of the unstable Kelvin - Helmholtz (KH) perturbations. As a first step toward this purpose, the analyze is done in a general way, irrespective of applying the model to a specific astronomical system. The transition zone between the two layers of the fluid is ignored. Then, we perform a linear analysis and by imposing suitable boundary conditions and considering a radiation field, we obtain appropriate dispersion relation. Unstable modes are studied by solving the dispersion equation numerically, and then growth rates of them are obtained. By analyzing our dispersion relation, we show that for a wide range of the input parameters, the radiation field has a destabilizing effect on KH instability. In eruptions of the galaxies or supermassive stars, the radiation field is dynamically important and because of the enhanced KH growth rates in the presence of the radiation; these eruptions can inject more momentum and energy into their environment and excite more turbulent motions.
description: Accepted for publication in Astrophysics and Space Science
A generalization of Opsut's lower bounds for the competition number of a graph
Creators: name: Sano, Yoshio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C20, 05C69

description: The notion of a competition graph was introduced by J. E. Cohen in 1968. The competition graph C(D) of a digraph $D$ is a (simple undirected) graph which has the same vertex set as D and has an edge between two distinct vertices x and y if and only if there exists a vertex v in D such that (x,v) and (y,v) are arcs of D. For any graph G, G together with sufficiently many isolated vertices is the competition graph of some acyclic digraph. In 1978, F. S. Roberts defined the competition number k(G) of a graph G as the minimum number of such isolated vertices. In general, it is hard to compute the competition number k(G) for a graph G and it has been one of the important research problems in the study of competition graphs to characterize a graph by its competition number. In 1982, R. J. Opsut gave two lower bounds for the competition number of a graph. In this paper, we give a generalization of these two lower bounds for the competition number of a graph.
description: 6 pages. arXiv admin note: text overlap with arXiv:0905.1763
Design of micro- and macro-scale polymeric metamaterial solutions for passive and active thermal camouflaging applications
Creators: Pisavadia, Harshil
Asad, Asad
Sameoto, Dan
Dolez, Patricia
Hogan, James D.
Publisher: name: University of Alberta Library
Year: 2023

This work utilizes predictive modeling techniques to guide and inform metamaterial design for heat management solutions and thermal radiation control. Specifically, micro- and macro-scale polyethylene-based solutions are proposed for passive and active thermal camouflage. A micro-scale post design is proposed for highly-tunable infrared emissivity based on varying unit cell geometrical configurations. Actively modulating these micro-features through lateral straining of up to 3% allows for redshifting the emissivity spectrum by up to 0.5 µm. Macroscale lenticular lens designs allow for a more passive form of camouflage due to its emissive stability for a range of configurations (e.g., single and sandwiched structures, increasing lens radii and height). Overall, the proposed metamaterial designs allow the tailoring of optical properties to improve thermal radiating performance.
Magnetic field structure in single late-type giants: The effectively single giant V390 Aur
Creators: name: Konstantinova-Antova, R.
name: Auriere, M.
name: Petit, P.
name: Charbonnel, C.
name: Tsvetkova, S.
name: Lebre, A.
name: Bogdanovski, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have studied the active giant V390 Aur using spectropolarimetry to obtain direct and simultaneous measurements of the magnetic field and the activity indicators in order to get a precise insight of its activity. We used the spectropolarimeter NARVAL at the Bernard Lyot Telescope (Observatoire du Pic du Midi, France) to obtain a series of Stokes I and Stokes V profiles. The Least Square deconvolution (LSD) technique was applied to detect the Zeeman signature of the magnetic field in each of our 13 observations and to measure its longitudinal component. We could also monitor the CaII K & H and IR triplet, as well as the H_alpha lines which are activity indicators. In order to reconstruct the magnetic field geometry of V390 Aur, we applied the Zeeman Doppler Imaging (ZDI) inversion method and present a map for the magnetic field. Based on the obtained spectra, we also refined the fundamental parameters of the star and the Li abundance. The ZDI revealed a structure in the radial magnetic field consisting of a polar magnetic spot of positive polarity and several negative spots at lower latitude. A high latitude belt is present on the azimuthal field map, indicative of a toroidal field close to the surface. It was found that the photometric period cannot fit the behaviour of the activity indicators formed in the chromosphere. Their behaviour suggests slower rotation compared to the photosphere, but our dataset is too short to be able to estimate the exact periods for them.Accepted for publication in A&A All these results can be explained in terms of an α-ωdynamo operation, taking into account the stellar structure and rotation properties of V390 Aur that we study using up to-date stellar models computed at solar metallicity. The calculated Rossby number also points to a very efficient dynamo
description: To appear in Astronomy & Astrophysics, 8 pages, 5 figures
Typhlodrominae
Creators: name: Gonçalves, Dinarte
name: Silva, Guilherme Liberato Da
name: Ferla, Noeli Juarez
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Phytoseiidae

description: Subfamily Typhlodrominae Wainstein
description: Published as part of Gonçalves, Dinarte, Silva, Guilherme Liberato Da & Ferla, Noeli Juarez, 2013, Phytoseiid mites (Acari) associated with yerba mate in southern Brazil, with description of a new species, pp. 357-371 in Zootaxa 3746 (2) on page 366, DOI: 10.11646/zootaxa.3746.2.6, http://zenodo.org/record/218553
Comment on arXiv:1104.2019, "Relative locality and the soccer ball problem," by Amelino-Camelia et al
Creators: name: Hossenfelder, Sabine
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is explained why the argument in arXiv:1104.2019 does not answer the question how to describe multi-particle states in models with a deformed Lorentz-symmetry in momentum space.
Geometrical Aspects on Parameter estimation of stochastic gravitational wave background: beyond the Fisher analysis
Creators: name: Seto, Naoki
name: Kyutoku, Koutarou
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The maximum likelihood method is often used for parameter estimation in gravitational wave astronomy. Recently, an interesting approach was proposed by Vallisneri to evaluate the distributions of parameter estimation errors expected for the method. This approach is to statistically analyze the local peaks of the likelihood surface, and works efficiently even for signals with low signal-to-noise ratios. Focusing special attention to geometric structure of the likelihood surface, we follow the proposed approach and derive formulae for a simplified model of data analysis where the target signal has only one intrinsic parameter, along with its overall amplitude. Then we apply our formulae to correlation analysis of stochastic gravitational wave background with a power-law spectrum. We report qualitative trends of the formulae using numerical results specifically obtained for correlation analysis with two Advanced-LIGO detectors.
description: 23 pages, to be published in PRD
Mindful physical education : factors that facilitate physical educators’ implementation of Teaching Games for Understanding into their teaching practice
Creators: name: Russell, Emma Margaret
Publisher: name: University of British Columbia
Year: 2010

description: In recent years, some academic scholars have advocated for change within Physical Education (P.E.) and promoted an alternative, Teaching Games for Understanding (TGfU), a teaching method grounded in social constructivist theory. Even though TGfU has met with some success, Butler (2005) suggests, it is still a challenge to transition the TGfU methodology into the practical teaching world. To establish those factors that help the implementation of TGfU into their teaching practices, this researcher interviewed five physical educators enrolled in a Master’s TGfU focused cohort, at the University of British Columbia. Following the completion of their Master’s summer institute, the participants were interviewed twice, at the beginning of the school year and then five to six weeks later. The participants were also asked to complete three Teaching Perspectives Inventories (TPI), one before and one after the summer institute, and a third one month after the start of the school year. The TPI is used to measure the teaching orientation of educators by organizing answers to teaching belief-specific questions into five teaching perspectives. Understanding that implementation of new initiatives requires support from other stakeholders, the researcher interviewed the participants’ primary colleagues and principals. Four main factors emerged from the research findings: transparent communication between stakeholders, teacher and student motivation, time, and professional development. It has become increasingly clear through the research findings that successful implementation is not simply one individual working alone to implement change but rather a complex network of different interrelating factors and stakeholders. When implementation of a curriculum innovation such as TGfU, is viewed as an interrelated entity it can be examined through the lens of complexity thinking. The complexity thinking characteristics of self-organization, feedback loops, decentralized control and complex networks, affects the manner in which new initiative are successful. Therefore, for implementation to be successful the type of complex network that is created is paramount. As Davis and Sumara (2008) suggest, a decentralized network – where stakeholders connect (transparency in communication) and collaborate (motivation) where its goal is to become collectively smarter (professional development) – can be seen as the blue print of a knowing and learning system.
Negative Temperature States in the Discrete Nonlinear Schroedinger Equation
Creators: name: Iubini, S.
name: Franzosi, R.
name: Livi, R.
name: Oppo, G. -L.
name: Politi, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We explore the statistical behavior of the discrete nonlinear Schroedinger equation. We find a parameter region where the system evolves towards a state characterized by a finite density of breathers and a negative temperature. Such a state is metastable but the convergence to equilibrium occurs on astronomical time scales and becomes increasingly slower as a result of a coarsening processes. Stationary negative-temperature states can be experimentally generated via boundary dissipation or from free expansions of wave packets initially at positive temperature equilibrium.
description: 4 pages, 5 figures
title: Besondere Bestimmungen der Prüfungsordnung für den Bachelorstudiengang Lehramt an Berufskollegs mit der beruflichen Fachrichtung Elektrotechnik an der Universität Paderborn : vom 22. Juli 2016
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2016
Subjects: subject: Sozialwissenschaften
subject: Bildung und Erziehung
subject: Hochschulbildung

description: Amtliche Mitteilungen / Universität Paderborn