cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Supplementary information from Evaporation induced acoustic emissions in microfluidic vessels
Creators: name: Dutta, S.
name: Bieling, T. J.
name: Verbiest, G. J.
Publisher: name: The Royal Society
Year: 2023
Subjects: classificationCode: 310899
subject: Plant biology not elsewhere classified
classificationCode: 401299
subject: Fluid mechanics and thermal engineering not elsewhere classified
classificationCode: 510301
subject: Acoustics and acoustical devices; waves

description: Fluid flow processes such as drainage and evaporation in porous media are crucial in geological and biological systems. The motion of the displacement front of a moving fluid through multi-phase interfaces is often associated with abrupt mechanical energy release, detectable as acoustic emissions. The exact origin of these pulses and their damping mechanisms are still subjects of debate. Here, we study the characteristics of such acoustic emissions during evaporation of water from artificial microfluidic vessels, inspired by the physiology of vascular water-transport in plants. From the extracted settling times of the recorded acoustic emissions, we identify three pulse types and attribute their origins to bubble formation, snap-off events and rapid pore invasion. We also show that the resonance frequencies between 10 and 70 kHz present in specific pulse types decrease with increasing vessel radius (ranging from 0.25 to 1.0 mm) and length (ranging from 2.5 to 10.0 mm). Our findings provide insight into evaporation-induced acoustic emissions from microfluidic systems, and their potential use in non-invasive inspection or vascular health monitoring.
Queen pheromones in Temnothorax ants: control or honest signal?
Creators: name: Brunner, Elisabeth
name: Kroiss, Johannes
name: Trindl, Andreas
name: Heinze, Jürgen
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 570 Biowissenschaften, Biologie

description: Background The division of reproductive labor among group members in insect societies is regulated by "queen pheromones". However, it remains controversial whether these are manipulative, i.e., actively suppress worker reproduction, or honestly signal the fertility status of the queen to which workers react in their own interest by refraining from laying eggs. Manipulative queen control is thought to lead to an evolutionary arms race between queens and workers, resulting in complex queen bouquets that diverge strongly among different populations and species. In contrast, honest signals would evolve more slowly and might therefore differ less strongly within and among species. Results We aimed at determining the tempo of the evolution of queen signals in two ways. First, we investigated whether queens of Temnothorax ants are capable of controlling egg laying by workers of their own, closely, and distantly related species. Second, we compared the species- and caste-specific patterns of cuticular hydrocarbons, which are assumed to convey information on reproductive status. In mixed-species colonies, queens were not able to fully suppress egg-laying and male production by workers of unrelated species, while workers did not reproduce under the influence of a queen from their own species. Furthermore, the chemical profiles differed more strongly among queens of different species than among the respective workers. Conclusions Our results suggest that cuticular hydrocarbons associated with fecundity are not fully conserved in evolution and evolve slightly faster than worker-specific components in the blend of cuticular hydrocarbons. While this higher rate of evolution might reflect an arms race between queens and workers, the observation that workers still respond to the presence of a queen from another species support the honest signal hypothesis. Future studies need to examine alternative explanations for a higher rate of evolution of queen-specific substances, such as an involvement of such compounds in mating.
Effect of quasi-bound states on coherent electron transport in twisted nanowires
Creators: name: Cuoghi, Giampaolo
name: Bertoni, Andrea
name: Sacchetti, Andrea
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quantum transmission spectra of a twisted electron waveguide expose the coupling between traveling and quasi-bound states. Through a direct numerical solution of the open-boundary Schrödinger equation we single out the effects of the twist and show how the presence of a localized state leads to a Breit-Wigner or a Fano resonance in the transmission. We also find that the energy of quasi-bound states is increased by the twist, in spite of the constant section area along the waveguide. While the mixing of different transmission channels is expected to reduce the conductance, the shift of localized levels into the traveling-states energy range can reduce their detrimental effects on coherent transport.
description: 8 pages, 9 color figures, submitted
title: Local environmental movements
Creators: name: David, Matthew
Publisher: name: University of Kent
Year: 2021

description: This thesis is based on a critical ethnography of "Local Environmental Movements" in and around East Kent. Starting from the office of the Canterbury and District Environmental Network, and moving through and beyond the C.D.E.N.s affiliated membership, my research led to participation in over three hundred meetings, protests and events, as well as to unnumerable personal meetings, informal interviews, conversations, letters and discussions. In total I encountered 187 different groups and organisations that saw themselves as in some way part of an environmental movement locally. There was no natural unity of beliefs, ideals or action. This problematic issue for my research became the problematic addressed by my research. I begin with a review of existing social theory and research into the dialectical relations between "agency and structure" (movement), "society and nature" (environment) and between proximity and distance (locality). After an outline of existing case study research into Local Environmental Movements from Geography, Anthropology and Sociology, I set out the case for my qualitative, critical and participatory, ethnographic method. The empirical research is presented in five chapters, each bringing together a number of themes, disputes and organisations. The five chapters are centred around the themes of: the network in genera; translocal locations and dis-locations of locaity; local activism within relations of autonomy and integration; local action within trans-local enivornmental actors; and party and network forms. In the conclusions the empirical materials are brought together within a discussion of the three theoretical themes. The construction of the "local" (within translocal or "glocal" discourses and practices), and the "environmental" issues (knowledge claims about 'nature' as well as conservation, ecological and environmental relations to the non-human) are related to the issue of 'movement formation' within the field of my research.
Spectral Variability of LBV star V532 (Romano's star)
Creators: name: Sholukhova, O. N.
name: Fabrika, S. N.
name: Zharova, A. V.
name: Valeev, A. F.
name: Goranskij, V. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: (abridged) We present the results of studying the spectral and photometric variability of the luminous blue variable star V532 in M33. The photometric variations are traced from 1960 to 2010, spectral variations - from 1992 to 2009. The star has revealed an absolute maximum of visual brightness (1992-1994, high/cold state) and an absolute minimum (2007-2008, low/hot state). The variability of the spectrum of V532 is fully consistent with the temperature variations in its photosphere, while both permitted and forbidden lines are formed in an extended stellar atmosphere. Broad components of the brightest lines were found, the broadening of these components is due to electron scattering in the wind parts closest to the photosphere. The wind velocity clearly depends on the size of the stellar photosphere or on the visual brightness, when brightness declines, the wind velocity increases. In the absolute minimum a kinematic profile of the V532 atmosphere was detected. The wind velocity increases and its temperature declines with distance from the star. In the low/hot state, the spectral type of the star corresponds to WN8.5h, in the high/cold state - to WN11. We studied the evolution of V532 along with the evolution of AG Car and the massive WR binary HD5980 in SMC. During their visual minima, all the three stars perfectly fit with the WNL star sequence by Crowther and Smith (1997). However, when visual brightness increases, all the three stars form a separate sequence. It is possible that this reflects a new property of LBV stars, namely, in the high/cold states they do not pertain to the bona fide WNL stars.
description: 29 pages, 14 figures, 1 table, to be published in Bull. SAO (v.66, No 2)
Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg : zugl. Jahrbuch d. Staatlichen Museums für Naturkunde in Stuttgart
Creators: name: Unkn
Publisher: name: unkn
Year: 2021

description: Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg : zugl. Jahrbuch d. Staatlichen Museums für Naturkunde in Stuttgart
description: Bd. 56, 1900
Physics with Nuclei at an Electron Ion Collider
Creators: name: Brooks, W K
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Lepto-nuclear colliders offer unique experimental opportunities to probe QCD in an extended medium. Of the many possibilities, three experiments are described here that are clearly feasible and of high scientific importance. First, a direct measurement of the saturation scale is possible using the broadening of the transverse momentum distribution of hadrons produced in semi-inclusive DIS. This connection to saturation physics will provide a quantitative measure of the degree to which this fundamental QCD phenomenon is occurring, and has important consequences in other high-energy scattering studies. Second, the measurement of quark energy loss is feasible, either as a direct measurement at a lower-energy EIC, or as an indirect measurement using hadron attenuation at higher energies. Such a measurement will offer the first experimental validation of the energy independence of this process, which is a consequence of the QCD analog of the LPM effect in QED. The third experiment is to determine the mechanisms of hadronization using the nucleus as a spatial analyzer, intercomparing hadron attenuation for nuclei of a range of sizes. The extended reach of the EIC in energy will allow probes of these mechanisms in the crucial high-z region for the heaviest nuclei, and will permit study of hadronization in heavy quark meson and baryon systems.
description: 5 pages, to appear in the proceedings of 18th International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2010), Florence, Italy, 19-23 Apr 2010
Bericht über die vierundfünfzigste Generalversammlung am 24. Juni 1899 in Heidenheim
Creators: name: Unkn
Publisher: name: unkn
Year: 2021

description: Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg : zugl. Jahrbuch d. Staatlichen Museums für Naturkunde in Stuttgart
description: Bd. 56, 1900
Existence and Uniqueness of Solutions to Nonlinear Evolution Equations with Locally Monotone Operators
Creators: name: Liu, Wei
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 35K55, 34G20, 35Q30

description: In this paper we establish the existence and uniqueness of solutions for nonlinear evolution equations on Banach space with locally monotone operators, which is a generalization of the classical result by J.L. Lions for monotone operators. In particular, we show that local monotonicity implies the pseudo-monotonicity. The main result is applied to various types of PDE such as reaction-diffusion equations, generalized Burgers equation, Navier-Stokes equation, 3D Leray-$α$ model and $p$-Laplace equation with non-monotone perturbations.
description: 29 pages
Untersuchung des bunten Mergels der Keuperformation auf seine chemischen und mineralogischen Bestandteile
Creators: name: Wülfing, Ernst
Publisher: name: unkn
Year: 2021

description: Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg : zugl. Jahrbuch d. Staatlichen Museums für Naturkunde in Stuttgart
description: Bd. 56, 1900
Temperature Accelerated Monte Carlo (TAMC): a method for sampling the free energy surface of non-analytical collective variables
Creators: name: Ciccotti, Giovanni
name: Meloni, Simone
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We introduce a new method to simulate the physics of rare events. The method, an extension of the Temperature Accelerated Molecular Dynamics, comes in use when the collective variables introduced to characterize the rare events are either non-analytical or so complex that computing their derivative is not practical. We illustrate the functioning of the method by studying the homogeneous crystallization in a sample of Lennard-Jones particles. The process is studied by introducing a new collective variable that we call Effective Nucleus Size $\mathcal N$. We have computed the free energy barriers and the size of critical nucleus, which result in agreement with data available in literature. We have also performed simulations in the liquid domain of the phase diagram. We found a free energy curve monotonically growing with the nucleus size, consistent with the liquid domain.
Beiträge zur Formenkenntnis der einheimischen Anodoten, mit besonderer Berücksichtigung der württembergischen Vorkommnisse
Creators: name: Buchner, Otto
Publisher: name: unkn
Year: 2021

description: Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg : zugl. Jahrbuch d. Staatlichen Museums für Naturkunde in Stuttgart
description: Bd. 56, 1900
Red Laser-Induced Fluorescence Energy Transfer in an Immunosystem
Creators: name: Oswald, Bernhard
name: Lehmann, Frank
name: Simon, Lydia
name: Terpetschnig, Ewald
name: Wolfbeis, Otto S.
Publisher: name: Universität Regensburg
Year: 2000
Subjects: subject: 540 Chemie

description: We describe two near-infrared fluorescent squaraine dyes (Sq635 and Sq660), their spectra, their covalent linkage to proteins, and their use as donor and acceptor, respectively, in a fluorescence resonance energy transfer (FRET) immunoassay based on the use of red lasers. The dyes show quantum yields of around 10% in the free form and up to 68% when bound to proteins. If converted into their N-hydroxysuccinimide esters, they can be linked to free amino groups of proteins. To improve water solubility, two sulfo groups were introduced. The emission spectrum of Sq635 overlaps the absorption spectrum of Sq660, a fact that makes them a useful pair of dyes for use in FRET immunoassay which is demonstrated for human serum albumin/anti-human serum albumin.
Nachträge zur Revision der Varietäten von Helix pomatia L.
Creators: name: Buchner, Otto
Publisher: name: unkn
Year: 2021

description: Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg : zugl. Jahrbuch d. Staatlichen Museums für Naturkunde in Stuttgart
description: Bd. 56, 1900
Coaching parents of children with developmental disabilities (Pierson et al., 2020)
Creators: name: Pierson, Lauren M.
name: Thompson, Julie L.
name: Ganz, J. B.
name: Wattanawongwan, Sanikan
name: Haas, April N.
name: Yllades, Valeria
Publisher: name: ASHA journals
Year: 2020
Subjects: subject: Language
subject: 200101 Communication Studies
subject: FOS: Media and communications

description: Purpose: Storybook reading provides a naturalistic context to promote bonding and increase oral communication between the reader and child. This study investigated the impact of modified dialogic reading procedures, which included a prompting component on the language skills of children with autism spectrum disorder and Down syndrome in the children’s homes.Method: A multiple-probe-across-participants design was used to investigate the efficacy of the intervention for this population. Parent training and coaching were provided via telepractice. Maintenance and generalization sessions were also conducted.Results: A functional relation was observed between parent implementation and telepractice coaching.Conclusion: While the child responses to comprehension questions did not change, changes in the parent implementation of modified dialogic reading procedures in response to coaching via telepractice were noted in this study.
Supplemental Material S1. Anticipatory set procedures the parents used during the intervention.
Supplemental Material S2. Flow chart depicting child responses and parent implementation of the PEEER strategy.
Pierson, L. M., Thompson, J. L., Ganz, J. B., Wattanawongwan, S., Haas, A. N., & Yllades, V. (2020). Coaching parents of children with developmental disabilities to implement a modified dialogic reading intervention using low technology via telepractice. American Journal of Speech-Language Pathology. Advance online publication. https://doi.org/10.1044/2020_AJSLP-20-00037
Amplitude Analysis of B0-->K+ pi- pi0 and Evidence of Direct CP Violation in B--> K* pi decays
Creators: name: The BABAR Collaboration
name: Lees, J. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We analyze the decay B0-->K+ pi- pi0 with a sample of 454 million B Bbar events collected by the BaBar detector at the PEP-II asymmetric-energy B factory at SLAC, and extract the complex amplitudes of seven interfering resonances over the Dalitz plot. These results are combined with amplitudes measured in B0-->K_S pi+ pi- decays to construct isospin amplitudes from B0-->K* pi and B0-->rho K decays. We measure the phase of the isospin amplitude Phi_3/2, useful in constraining the CKM unitarity triangle angle gamma and evaluate a CP rate asymmetry sum rule sensitive to the presence of new physics operators. We measure direct CP violation in B0-->K*+ pi- decays at the level of 3 sigma when measurements from both B0-->K+ pi- pi0 and B0-->K_S pi+ pi- decays are combined.
description: 26 pages, 23 eps figures, submitted to Phys. Rev. D
EB viral genomes in epithelial nasopharyngeal carcinoma cells
Creators: name: Wolf, Hans J.
name: zur Hausen, H.
name: Becker, V.
Publisher: name: Universität Regensburg
Year: 1973
Subjects: subject: 610 Medizin
subject: Antigens, Viral/analysis
subject: Autoradiography
subject: Carcinoma/microbiology
subject: Complement Fixation Tests
subject: DNA/isolation & purification
subject: DNA, Neoplasm/metabolism
subject: Herpesvirus 4, Human/isolation & purification
subject: Humans
subject: Leukemia, Lymphoid
subject: Lymphocytes/analysis
subject: Microscopy, Electron
subject: Nasopharyngeal Neoplasms/microbiology
subject: Neoplasms
subject: Nucleic Acid Hybridization
subject: RNA, Viral/metabolism

description: Zeitschr. hervorgeg. aus u. aufgeg. in: Nature (London)
The impact of structural inequities and interpersonal violence on food security and HIV care among women living with and affected by HIV in a Canadian setting
Creators: name: Barreto, Daniella Felicia Louise
Publisher: name: University of British Columbia
Year: 2017

description: BACKGROUND: Women living with HIV (WLWH) and sex workers (SWs) are priority populations for HIV prevention, diagnosis, treatment, and care. There is limited research into the impacts of structural (e.g., laws) and interpersonal violence (i.e., physical, sexual, verbal) on access to necessities (e.g., food, housing), HIV treatment, or the relationship between violence and HIV stigma. This thesis investigated the role of structural and interpersonal violence in an environment of HIV non-disclosure criminalization, in food insecurity among SWs living with and affected by HIV, and in antiretroviral (ART) adherence. METHODS: Data were drawn from two community-based prospective cohort studies, An Evaluation of Sex Workers’ Health Access (AESHA) and Sexual Health and HIV/AIDS: Women’s Longitudinal Needs Assessment (SHAWNA). Bivariate and multivariable logistic regression were used to examine the correlates of physical and/or verbal violence due to HIV disclosure without consent among WLWH in the SHAWNA cohort. Bivariate and multivariable logistic regression using generalized estimating equations (GEE) were used to model correlates of food insecurity among SWs in the AESHA cohort. Finally, a multivariable confounder model was created to assess the independent relationship between ART adherence and physical and/or sexual violence for WLWH in the SHAWNA cohort. RESULTS: Among 255 WLWH enrolled in SHAWNA between 2010-2016, bivariate and multivariable logistic regression showed that WLWH who were “outed” had elevated odds of experiencing physical and/or verbal violence (Objective 1). In AESHA, among 761 SWs living with or affected by HIV between 2010-2014, bivariate and multivariable logistic regression using GEE revealed increased odds of food insecurity for SWs who experienced physical and/or sexual violence (Objective 2). Among 250 WLWH enrolled in SHAWNA between 2014-2017, bivariate and multivariable logistic regression using GEE found decreased odds of optimal ART adherence among WLWH who experienced physical and/or sexual violence (Objective 3). CONCLUSIONS: Structural and interpersonal violence are important factors in the health needs and outcomes of SWs and WLWH. Universally applied trauma-informed care by primary healthcare providers is crucial. The decriminalization of sex work and HIV non-disclosure must be a priority. Given the high proportion of Indigenous women represented in this thesis, culturally relevant programming must be accessible.
Zwei wiedereröffnete Fundplätze für die Grenzschichten der schwäbischen Trias-Lias-Formation
Creators: name: Engel, Theodor
Publisher: name: unkn
Year: 2021

description: Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg : zugl. Jahrbuch d. Staatlichen Museums für Naturkunde in Stuttgart
description: Bd. 56, 1900
title: An Exploratory Investigation of the Determinants and Ratings Implications of Performance Appraisal Plan Characteristics
title: Stanford Graduate School of Business Working Paper No. 3320
titleType: AlternativeTitle
Creators: name: Armstrong, Christopher S.
name: Ittner, Christopher D.
name: Larcker, David F.
Publisher: name: Stanford University Graduate School of Business
Year: 2014

description: Performance appraisal is one of the cornerstones of management control systems. Although this topic has been the subject of considerable prior research, most of this work is based on a single observation per firm or performance appraisal practices within a single organization. In contrast, this study examines the design of performance appraisal systems using detailed proprietary data of the actual performance goals and the extent to which these goals are aligned among firm employees for 408,816 employees in 153 distinct firms. These novel data are analyzed using a two-step hierarchical approach that allows the contextual firm-level attributes to moderate the relations between the user characteristics and appraisal plan design attributes.
Ordered Phases of Itinerant Dzyaloshinsky-Moriya Magnets and Their Electronic Properties
Creators: name: Ho, Kwan-yuet
name: Kirkpatrick, T. R.
name: Sang, Yan
name: Belitz, D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A field theory appropriate for magnets that display helical order due to the Dzyaloshinsky-Moriya mechanism, a class that includes MnSi and FeGe, is used to derive the phase diagram in a mean-field approximation. The helical phase, the conical phase in an external magnetic field, and recent proposals for the structure of the A-phase and the non-Fermi-liquid region in the paramagnetic phase are discussed. It is shown that the orientation of the helical pitch vector along an external magnetic field within the conical phase occurs via two distinct phase transitions. The Goldstone modes that result from the long-range order in the various phases are determined, and their consequences for electronic properties, in particular the specific heat, the single-particle relaxation time, and the electrical and thermal conductivities, are derived. Various aspects of the ferromagnetic limit, and qualitative differences between the transport properties of helimagnets and ferromagnets, are also discussed.
description: 22pp, 8 eps figs
Fluorescence studies on fluid ordered membranes using lipophilic ruthenium-ligand complexes with long luminescence decay times
Creators: name: Augustin, Christine M.
name: Wolfbeis, Otto S.
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: lipid membrane probe; ruthenium-ligand complex; luminescence; decay time; light polarization
subject: 540 Chemie

description: The fluidity of lipid membranes contained in aqueous medium was studied using new fluorescent lipophilic ruthenium-ligand complexes containing dipalmitoyl-glycerophospho-ethanolamine (PE) or hexadecyl side groups, respectively. The new probes display long luminescence decay times and polarized emission, thus making them viable molecular sensors for studying the dynamics and molecular orientation of ordered liquids. Experiments are reported in which the probes were incorporated into lipid bilayers of vesicles, and their luminescence was studied with respect to temperature-dependent emission intensity, decay time and steady-state luminescence polarization.
Framework and maturity model to guide and evaluate corporate contributions to sustainable development of neighbouring communities : specific focus on geothermal power projects
Creators: name: Arianpoo, Nastaran
Publisher: name: University of British Columbia
Year: 2017

description: The goal of this research is to present a new way of thinking (in the form of a framework) about how geothermal power projects can contribute to sustainable development (SD) in a way that harmonizes these projects with SD plans of their neighbouring communities. The research aims to create a SD approach for the greater geothermal power industry that is consistent with the expectations and values of today’s society. A framework, referred to as the Geothermal Sustainable Development (GSD) framework, is proposed aiming to guide and evaluate the contributions of a geothermal power project to SD in the local and regional communities. After developing the framework, to help companies and other interested parties to track and evaluate the progress of the project with respect to its approach towards SD, an evaluation strategy in the form of a maturity model is proposed. The maturity model aims to highlight the depth and quality of SD-thinking and its influence within a company/project development paradigm. The research is based on a combination of quantitative and qualitative research approaches to evaluate and test these outcomes. A survey was used that represents the quantitative research approach. This survey set out to assess whether the identified objectives presented in the framework are indeed suitable and effective as tools for the intended purposes of the framework. A second part of the research consisted of interviews (qualitative research approach) to evaluate the maturity model and its applications. Six case studies were discussed with interviewees. The developed framework can be used by the industry, communities, NGOs, and government as a starting-point to establish common ground in the development of geothermal power projects to focus the attention of everyone. It also provides the industry with an opportunity to assess their performance and communicate their approaches, contributions, and progress to the stakeholders and (possible) investors consistently and clearly. The combination of a GSD framework and the proposed SD maturity model could be used by any company at project and corporate levels that have already committed or are willing to commit to SD to evaluate their performance.
Spin connection and boundary states in a topological insulator
Creators: name: Parente, V.
name: Lucignano, P.
name: Vitale, P.
name: Tagliacozzo, A.
name: Guinea, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the surface resistivity of a three-dimensional topological insulator when the boundaries exhibit a non trivial curvature. We obtain an analytical solution for a spherical topological insulator, and we show that a non trivial quantum spin connection emerges from the three dimensional band structure. We analyze the effect of the spin connection on the scattering by a bump on a flat surface. Quantum effects induced by the geometry lead to resonances when the electron wavelength is comparable to the size of the bump.
description: 11 pages, 4 figures, submitted
Der Nachweis von Epstein-Barr-Virus-Genomen in der Ohrspeicheldrüse = Evidence for the persistence of Epstein-Barr-virus in the parotid gland (author's transl.)
Creators: name: Wilmes, E.
name: Wolf, Hans J.
Publisher: name: Universität Regensburg
Year: 1981
Subjects: subject: 610 Medizin
subject: Antibodies, Viral/analysis
subject: B-Lymphocytes/immunology
subject: DNA, Viral/immunology
subject: Genes, Viral
subject: Herpesvirus 4, Human/immunology
subject: Humans
subject: Infectious Mononucleosis/immunology
subject: Palatine Tonsil/immunology
subject: Parotid Gland/immunology

description: EBV is associated with B-lymphocytes. It is, however, not clear whether spontaneous activation of EBV genomes in carrier lymphocytes, which are present in the lymphocyte rich area of the oropharynx, is responsible for lifelong persistence of antibody-titers directed against EBV related antigens and the shedding of virus into the oropharynx. Alternatively EBV could reside in specific sites of the body and be produced there resembling somehow the situation of Marek's disease virus of chicken. That virus is found in T-lymphocytes and produced and spread from the epithelium of featherfollicles. In situ hybridisations with frozen sections of tonsils and parotid glands reveiled that EBV genomes are present in the tissue of the parotid gland of healthy seropositive persons. The data from in situ hybridisations could be confirmed using stringent reassociationkinetics. It is suggested that spontaneous activation of the lymphocytes is a very rare event and neither the source of virus in the saliva nor the reason for the lifelong persistence of antibodies to EBV related antigens.
Comprehensive study of the magnetic stars HD 5797 and HD 40711 with large chromium and iron overabundances
Creators: name: Semenko, E. A.
name: Yakunin, I. A.
name: Kuchaeva, E. Yu.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of a comprehensive study of the chemically peculiar stars HD 5797 and HD 40711. The stars have the same effective temperature, Teff = 8900 K, and a similar chemical composition with large iron (+1.5 dex) and chromium (+3 dex) overabundances compared to the Sun. The overabundance of rare-earth elements typically reaches +3 dex. We have measured the magnetic field of HD 5797. The longitudinal field component Be has been found to vary sinusoidally between -100 and +1000 G with a period of 69 days. Our estimate of the evolutionary status of the stars suggests that HD 5797 and HD 40711, old objects with an age t \approx 5 \times 108 yr, are near the end of the core hydrogen burning phase.
description: 26 pages, 5 Encapsulated Postscript figures
Der geologische Bau und die Bewaldung des deutschen Landes
Creators: name: Graner, Friedrich von
Publisher: name: unkn
Year: 2021

description: Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg : zugl. Jahrbuch d. Staatlichen Museums für Naturkunde in Stuttgart
description: Bd. 56, 1900
The quantum vacuum at the foundations of classical electrodynamics
Creators: name: Leuchs, G.
name: Villar, A. S.
name: Sanchez-Soto, L. L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In the classical theory of electromagnetism, the permittivity and the permeability of free space are constants whose magnitudes do not seem to possess any deeper physical meaning. By replacing the free space of classical physics with the quantum notion of the vacuum, we speculate that the values of the aforementioned constants could arise from the polarization and magnetization of virtual pairs in vacuum. A classical dispersion model with parameters determined by quantum and particle physics is employed to estimate their values. We find the correct orders of magnitude. Additionally, our simple assumptions yield an independent estimate for the number of charged elementary particles based on the known values of the permittivity and the permeability, and for the volume of a virtual pair. Such interpretation would provide an intriguing connection between the celebrated theory of classical electromagnetism and the quantum theory in the weak field limit.
description: Accepted in Applied Physics B: Special Issue for the 50 years of the laser. Comments are welcome.
Time-Resolved Luminescence Energy Transfer Immunobinding Study Using a Ruthenium–Ligand Complex as a Donor Label
Creators: name: Augustin, Christine M.
name: Oswald, Bernhard
name: Wolfbeis, Otto S.
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: luminescence immunoassay; time resolution; luminescence decay time; resonance energy transfer (RET); fluorescent labels; ruthenium labels
subject: 540 Chemie

description: A novel immunosystem is described that exploits the effect of luminescence energy transfer from a luminescently labeled antigen to a fluorescent antibody. A luminescent ruthenium–ligand complex (D-455) with absorption/emission maxima at 456/639 nm, respectively, was employed as the donor label, and a squaraine-type cyanine label (636/655 nm), as the fluorescent acceptor label. Specifically, the system human serum albumin (HSA)/anti-HSA was studied. HSA was labeled with the donor dye D-455, and anti-HSA was labeled with the acceptor dye A-631. On formation of the antigen–antibody complex, energy transfer occurs. The radiationless energy transfer affects both the decay time of D-455 and the intensities of the emissions of both D-455 and A-631. The decay time of around 500 ns of D-455 allows frequency–domain measurements in the low kilohertz range and therefore can be based on the use of conventional optoelectronics. This also suggests gated measurements to be performed. The major difference from existing HSA immunosystems is the use of a slow decaying ruthenium–ligand complex as the donor and of a long-wave emitting cyanine acceptor dye having a high quantum yield and a decay kinetics that is governed by the rate of energy transfer from the slow decaying donor.
Interactive Visualization of the Largest Radioastronomy Cubes
Creators: name: Hassan, A. H.
name: Fluke, C. J.
name: Barnes, D. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: 3D visualization is an important data analysis and knowledge discovery tool, however, interactive visualization of large 3D astronomical datasets poses a challenge for many existing data visualization packages. We present a solution to interactively visualize larger-than-memory 3D astronomical data cubes by utilizing a heterogeneous cluster of CPUs and GPUs. The system partitions the data volume into smaller sub-volumes that are distributed over the rendering workstations. A GPU-based ray casting volume rendering is performed to generate images for each sub-volume, which are composited to generate the whole volume output, and returned to the user. Datasets including the HI Parkes All Sky Survey (HIPASS - 12 GB) southern sky and the Galactic All Sky Survey (GASS - 26 GB) data cubes were used to demonstrate our framework's performance. The framework can render the GASS data cube with a maximum render time < 0.3 second with 1024 x 1024 pixels output resolution using 3 rendering workstations and 8 GPUs. Our framework will scale to visualize larger datasets, even of Terabyte order, if proper hardware infrastructure is available.
description: 15 pages, 12 figures, Accepted New Astronomy July 2010
Mitteilungen über die Bestäubungseinrichtungen der Blüten
Creators: name: Kirchner, Oskar von
Publisher: name: unkn
Year: 2021

description: Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg : zugl. Jahrbuch d. Staatlichen Museums für Naturkunde in Stuttgart
description: Bd. 56, 1900
Fiber optic multi-channel protein detector for use in preparative continuous annular chromatography
Creators: name: Apostolidis, Athanasios
name: Lehmann, Hartmut
name: Schwotzer, Günter
name: Willsch, Reinhardt
name: Prior, Albert
name: Wolfgang, Jürgen
name: Klimant, Ingo
name: Wolfbeis, Otto S.
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: 540 Chemie

description: Continuous annular chromatography is an effective method in the separation of preparative scale quantities of biological compounds including proteins where established batch chromatography borders on it. The need for identification or quantification of proteins triggered the development of respective detection units. Here, we describe two types of optical multi-channel detectors. The first is a fiber optic multi-channel detector suitable for the separation of aqueous protein solutions. The second is a technically improved (circular optic) device suitable for application in multi-channel detection. Specifically, UV-absorption measurements of proteins at 280 nm were carried out using newly designed fiber optic detectors having eight and 16 channels. Calibration plots were established for a series of stock solutions of known concentrations of proteins. Mathematical functions were derived from these calibration data to simulate the response of the detector. Limits of detection and the ranges of validity of the fit functions were determined. The 16-channel detector has a theoretical limit of 24 detection that is equivalent to absorbance changes of 10⁻⁴ units.
Ordinary beauty
Creators: name: Padgett, Eileen Victoria
Publisher: name: University of British Columbia
Year: 2017

description: Ordinary Beauty is a piece for piano and strings (Violin I, Violin II, Viola, Cello, Bass). The string parts may be performed by a string orchestra, or with a single player on each part. The work is approximately 23 minutes in length, and comprises of 5 movements, each named after and inspired by scenes of commonplace beauty found in the natural surroundings of Vancouver. The movements are as follows: Leaf in the Wind, Petals in the Rain, Sunlit Grove, Hawk in Flight, and Ocean Spray. Ordinary Beauty overlays Romantic structures on minimalist patterns. The minimalist figures heighten the rhythmic interest, while the Romantic melodic and harmonic principles provide the piece with structure and direction. The piece pays homage to the natural world, but also explores the boundaries between nature and technology; minimalism has ties to industrialization and machinery, while Romanticism is associated with pastoral imagery. The intentional juxtaposition and hybridization of these styles questions the boundaries and limits of both the respective styles and their real-world associations.
On recurrence and ergodicity for geodesic flows on noncompact periodic polygonal surfaces
Creators: name: Conze, Jean-Pierre
name: Gutkin, Eugene
Publisher: name: arXiv
Year: 2010
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37A25, 37A40, 37C40, 37E35

description: We study the recurrence and ergodicity for the billiard on noncompact polygonal surfaces with a free, cocompact action of $\Z$ or $\Z^2$. In the $\Z$-periodic case, we establish criteria for recurrence. In the more difficult $\Z^2$-periodic case, we establish some general results. For a particular family of $\Z^2$-periodic polygonal surfaces, known in the physics literature as the wind-tree model, assuming certain restrictions of geometric nature, we obtain the ergodic decomposition of directional billiard dynamics for a dense, countable set of directions. This is a consequence of our results on the ergodicity of $\ZZ$-valued cocycles over irrational rotations.
description: 48 pages, 12 figures
Synopsis der deutschen Blindwanzen ( Hemiptera heteroptera, Fam. Capsidae)
Creators: name: Hüeber, Theodor
Publisher: name: unkn
Year: 2021

description: Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg : zugl. Jahrbuch d. Staatlichen Museums für Naturkunde in Stuttgart
description: Bd. 56, 1900
Magnetic fields in cosmic particle acceleration sources
Creators: name: Bykov, Andrei M.
name: Ellison, Donald C.
name: Renaud, Matthieu
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We review here some magnetic phenomena in astrophysical particle accelerators associated with collisionless shocks in supernova remnants, radio galaxies and clusters of galaxies. A specific feature is that the accelerated particles can play an important role in magnetic field evolution in the objects. We discuss a number of CR-driven, magnetic field amplification processes that are likely to operate when diffusive shock acceleration (DSA) becomes efficient and nonlinear. The turbulent magnetic fields produced by these processes determine the maximum energies of accelerated particles and result in specific features in the observed photon radiation of the sources. Equally important, magnetic field amplification by the CR currents and pressure anisotropies may affect the shocked gas temperatures and compression, both in the shock precursor and in the downstream flow, if the shock is an efficient CR accelerator. Strong fluctuations of the magnetic field on scales above the radiation formation length in the shock vicinity result in intermittent structures observable in synchrotron emission images. Resonant and non-resonant CR streaming instabilities in the shock precursor can generate mesoscale magnetic fields with scale-sizes comparable to supernova remnants and even superbubbles. This opens the possibility that magnetic fields in the earliest galaxies were produced by the first generation Population III supernova remnants and by clustered supernovae in star forming regions.
description: 30 pages, Space Science Reviews
Die Bekämpfung des Hagels durch das sogenannte Wetterschießen
Creators: name: Mack, Karl
Publisher: name: unkn
Year: 2021

description: Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg : zugl. Jahrbuch d. Staatlichen Museums für Naturkunde in Stuttgart
description: Bd. 56, 1900
Dying Radio Sources in Clusters
Creators: name: Murgia, M.
name: Parma, P.
name: Mack, K. -H.
name: de Ruiter, H. R.
name: Fanti, R.
name: Govoni, F.
name: Tarchi, A.
name: Giacintucci, S.
name: Markevitch, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the study of five `dying' nearby radio galaxies belonging to the WENSS minisurvey and to the B2 bright catalogs: WNB1734+6407, WNB1829+6911, WNB1851+5707, B2 0120+33, and B2 1610+29. These sources have been selected on the basis of their extremely steep broad-band radio spectra. The modeling of the integrated spectra and the deep spectral index images obtained with the VLA confirmed that in these sources the central engine has ceased to be active for a significant fraction of their lifetime although their extended lobes have not yet completely faded away. We found that WNB1851+5707 is in reality composed by two distinct dying galaxies, which appear blend together as a single source in the WENSS. In the cases of WNB1829+6911 and B2 0120+33, the fossil radio lobes are seen in conjunction with a currently active core. A very faint core is detected also in a MERLIN image of WNB1851+5707a, one of the two dying sources composing WNB1851+5707. We found that all sources of our sample are located (at least in projection) at the center of an X-ray emitting cluster. Our results suggest that the duration of the dying phase for a radio source in cluster can be significantly higher with respect to that of a radio galaxy in the field. The simplest interpretation is that the low-frequency emission from the fading radio lobes last longer if their expansion is somewhat reduced or even stopped. Another possibility is that the occurrence of dying sources is higher in galaxy clusters. Radio sources in dense environment, like e.g. the center of cooling core clusters, may have a peculiar accretion mode which results in a bursting duty cycle sequence of active and quiescent periods. This result could have important implications for theories of the life cycles of radio sources and AGN feedback in clusters of galaxies but awaits confirmation from future observations of larger samples of objects.
description: 21 pages, 9 figures, accepted for publication in Astronomy and Astrophysics. For a version with high-quality figures see http://erg.ca.astro.it/preprints/dying2010/
Zambia CLEWs Nexus Workshop (Nov '24) - Climate Compatible Growth
Creators: name: Cronin, Jennifer
Publisher: name: Zenodo
Year: 2024
Subjects: Climate change
Resource nexus

description: These slides were used in a workshop on the Zambian Climate-Land-Energy-Water Nexus, in Lusaka, 6th November 2024.

The workshop was hosted by researchers from the Centre for Energy, Environment and Engineering, Zambia (CEEEZ) and University College London (UCL), under the Climate Compatible Growth research programme. 

The workshop included sessions to present the results of a literature review and policy analysis, and group discussions, aiming to develop understanding of key issues and to co-develop a research agenda.

More information is available from the project team: jen.cronin@ucl.ac.uk and ceeez2015@gmail.com.

This material has been produced with support from the Climate Compatible Growth (CCG) programme. CCG is funded by UK AID from the UK Government. Views expressed herein do not necessarily reflect the UK government's official policies.