cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Regret, Delete, (Do Not) Repeat: An Analysis of Self-Cleaning Practices on Twitter After the Outbreak of the COVID-19 Pandemic
Creators: name: Ferreyra, Nicolás E. Díaz
name: Shahi, Gautam Kishore
name: Tony, Catherine
name: Stieglitz, Stefan
name: Scandariato, Riccardo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Social and Information Networks (cs.SI)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: During the outbreak of the COVID-19 pandemic, many people shared their symptoms across Online Social Networks (OSNs) like Twitter, hoping for others' advice or moral support. Prior studies have shown that those who disclose health-related information across OSNs often tend to regret it and delete their publications afterwards. Hence, deleted posts containing sensitive data can be seen as manifestations of online regrets. In this work, we present an analysis of deleted content on Twitter during the outbreak of the COVID-19 pandemic. For this, we collected more than 3.67 million tweets describing COVID-19 symptoms (e.g., fever, cough, and fatigue) posted between January and April 2020. We observed that around 24% of the tweets containing personal pronouns were deleted either by their authors or by the platform after one year. As a practical application of the resulting dataset, we explored its suitability for the automatic classification of regrettable content on Twitter.
description: Accepted at CHI '23 Late Breaking Work (LBW)
What powers the starburst activity of NGC 1068? Star-driven gravitational instabilities caught in the act
Creators: name: Romeo, Alessandro B.
name: Fathi, Kambiz
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We explore the role that gravitational instability plays in NGC 1068, a nearby Seyfert galaxy that exhibits unusually vigorous starburst activity. For this purpose, we use the Romeo-Falstad disc instability diagnostics and data from BIMA SONG, SDSS and SAURON. Our analysis illustrates that NGC 1068 is a gravitationally unstable "monster". Its starburst disc is subject to unusually powerful instabilities. Several processes, including AGN/stellar feedback, try to quench such instabilities from inside out by depressing the surface density of molecular gas across the central kpc, but they do not succeed. Gravitational instability "wins" because it is driven by the stars via their much higher surface density. In this process, stars and molecular gas are strongly coupled, and it is such a coupling that ultimately triggers local gravitational collapse/fragmentation in the molecular gas.
description: MNRAS, in press. Moderate revision to match the accepted version
title: The impact of loyalty programmes on customer retention in the Nigerian banking sector
Creators: name: Ojesina, Opeyemi Akintunde
Publisher: name: Edinburgh Napier University
Year: 2020

description: The key contributions of this research span across academic literature, research methodology and professional practice. Literature on loyalty programmes indicate that the practice is common in organisations that are desirous of reducing customer attrition with the ultimate goal of improving business performance and maximizing profits. It is argued that loyalty programmes positively affect sales, engenders satisfaction and helps to retain customers. This notwithstanding, there has been debates as to whether customer loyalty programmes leads to retention and profitability. In recent time, loyalty programmes have become a popular exercise in the Nigerian banking sector as evidenced by its frequency in that sector of the economy. However, although empirical work exist on their impact, limited research work has been done on the programme with specific reference to the Nigerian banking sector. Bearing this in mind, this study explores The Impact of Customer Loyalty Programmes on Customer Retention in Nigerian Banks. Use is made of both loyalty programmes literatures and empirical research to understand this impact with the ultimate aim of developing guidelines for its application in banks. The study was undertaken from an interpretivist stance and employed an exploratory approach. In this research, one hundred and fifty questionnaires were received back as valid from a total of one hundred and eighty given out to respondents (customers) from five banks. The result was instructive and formed the basis for interviews conducted afterwards. Fifteen semi structured interviews were conducted comprising of ten bank executives at strategic management level (two each from the five banks) and five bank customers (one each from the five banks), The interviews focused on elements of loyalty, satisfaction, retention and competition. The research findings reveal to a large extent that customers are satisfied with their banks’ loyalty programmes and are at ease continuing patronage with them, thereby reducing attrition. The key contribution is using the findings to develop model guidelines for establishing and deploying loyalty programmes in Nigerian banks. It is concluded from this study that loyalty programmes in banks are profitable and may engender satisfaction. This is in addition to helping to reduce customer attrition when carefully planned and executed, bearing in mind the developed guidelines.
Efficiency of Bifacial Si Solar Cells at Low Irradiance. Effect of Design and Fabrication Technology Factors
Creators: name: Grigorieva, G.
name: Kagan, M.
name: Nekrasov, V.
name: Zviagina, K.
name: Kreinin, L.
name: Bordin, N.
name: Broder, J.
name: Eisenberg, Y.
name: Eisenberg, N.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1805-1809
description: There are applications of solar cells under illumination conditions for lower than "one sun". Solar cell
efficiency decreases with decreasing irradiance. Several factors affecting conversion efficiency at low irradiances (down
to ~0.01 sun) are studied. Experiments were performed with bifacial n+-p-p+ Si solar cells, fabricated using an ion
implantation procedure for BSF formation. Optimal resistivity of the starting Si is evaluated taking into consideration
recombination in the ion induced defect layer. Use of high resistivity Si eliminates the influence of this defect layer on
recombination in the base region. Lifetime dependence on injection level can cause current non linearity and therefore an
additional efficiency drop at low irradiance. Light induced defects can be responsible for this effect. The quality of the
p-n junction as expressed by the ideality factors of the two-diode model is one of the most important factors affecting
solar cell conversion efficiency at low light intensities.
title: Sources of economic and cost statistics for Canadian construction: a compilation
Creators: name: Rakhra, A. S.
Publisher: name: National Research Council of Canada. Division Of Building Research
Year: 1982
Subjects: subject: economics
subject: science économique
subject: construction costs
subject: coût de la construction
subject: construction technology
subject: technologie de la construction
subject: statistics (data)
subject: donnée statistique
subject: North America
subject: Amérique du Nord
subject: information sources
subject: construction trade and industry associations
subject: construction data collection and analysis
subject: energy conservation
subject: publications
subject: newsletters
subject: data tapes
subject: governments
subject: consulting firms
subject: publishing firms

description: The scope of this report is restricted to economic and cost-related statistical information. Its coverage is also limited with regard to statistical information on energy conservation in construction. It should, however, enable the designer, the contractor and the researcher to find the sources of information pertaining to their questions.
description: Le champ d'intérêt de ce rapport se limite à l'information de nature économique et statistique reliée aux coûts. Sa portée est également restreinte à l'information statistique sur la conservation de l'énergie dans le domaine de la construction. Ce document devrait toutefois permettre au concepteur, à l'entrepreneur et au chercheur de trouver les sources d'information pertinentes dont ils ont besoin.
Towards the Limits of Efficiency of Screen Printed Solar Cells. New Techniques for the Front Side Contacts
Creators: name: Vázquez, C.
name: Caballero, L.J.
name: Vazquez, M.A.
name: Alonso, J.
name: Ramos-Barrado, J.R.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1816-1819
description: One of the main challenges in the production of industrial silicon solar cells is to increase the
efficiency. It implies the improvement of the different process steps in the industrial production. One with the
higher potential for improvement is the front side contact. Screen printing technology is currently the most
widespread method for front side contact formation. Control in the contact, line resistance and aspect ratio,
together with the implications in cell performance and series resistance have been analyzed. Modeling shows that
low conductivity, high contact resistance and low aspect ratio with wide finger design accounts for more than 1%
absolute efficiency loss in conventional screen printed solar cells. Improvements in these parameters will allow us
to reach efficiencies over 18% in Czocharalski – Si (Cz-Si) photovoltaic cells without significant change in the
technology for front contact formation.
A multipurpose information engine that can go beyond the Carnot limit
Creators: name: Rana, Shubhashis
name: Jayannavar, A. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Motivated by the recent work by Mandal and Jarzynski on autonomous Maxwell demon information engine, we have extended their model by introducing two different heat baths. The system (demon) is coupled to a memory register (tape) and a work source. The performance of the system depends on the interplay between these two sources along with the heat baths. We have found the system can act as an engine, refrigerator or an eraser. Even the combination of any two is possible in some parameter space. We have achieved the efficiency of the engine is greater than Carnot limit. The coefficient of performance of refrigerator also achieves larger than Carnot limit.
description: 14 pages, 9 figures
Spectral Measurements Using Component Cells: Examinations on Measurement Precision
Creators: name: Jaus, J.
name: Mißbach, T.
name: Philipps, S.P.
name: Siefer, G.
name: Bett, A.W.
Publisher: name: WIP
Year: 2011
Subjects: Advanced Photovoltaics : New Concepts and Ultra-High Efficiency
Terrestrial Concentrator Systems

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 176-181
description: In outdoor measurements, frequently one solar cell (or a set of component cells) is used to evaluate
the effect of spectral changes on a PV module. For concentrator photovoltaic (CPV) power plants with multi-junction
solar cells, a common method is to use component cells to study the influence of the spectral conditions on the output
current of the module performance. However, quite often the spectral response of the component cells is different
from the one in the subcell of the multi-junction solar cell. In such situations, the current generation in the component
cell is not directly related to that of the III-V multi-junction solar cell. In this paper, we use a large set of simulated
spectra based on climate data from eight different locations to evaluate the error which is induced by the difference in
the spectral response between two solar cells. We also introduce an empirical mismatch function (EMF), which
allows to significantly reduce the transformation errors.
Commutative deformations of general relativity: nonlocality, causality, and dark matter
Creators: name: de Vegvar, P. G. N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Hopf algebra methods are applied to study Drinfeld twists of (3+1)-diffeomorphisms and deformed general relativity on \emph{commutative} manifolds. A classical nonlocality length scale is produced above which microcausality emerges. Matter fields are utilized to generate self-consistent Abelian Drinfeld twists in a background independent manner and their continuous and discrete symmetries are examined. There is negligible experimental effect on the standard model of particles. While baryonic twist producing matter would begin to behave acausally for rest masses above $\sim1-10$ TeV, other possibilities are viable dark matter candidates or a right handed neutrino. First order deformed Maxwell equations are derived and yield immeasurably small cosmological dispersion and produce a propagation horizon only for photons at or above Planck energies. This model incorporates dark matter without any appeal to extra dimensions, supersymmetry, strings, grand unified theories, mirror worlds, or modifications of Newtonian dynamics.
description: 47 pages including references, 0 figures, 0 tables Various typos/omissions corrected
Timeliopsis fulvigula subsp. montana Mayr
Creators: name: , Mary
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Meliphagidae
Timeliopsis

description: Timeliopsis fulvigula montana Mayr Timeliopsis fulvigula montana Mayr, 1931c: 659 (Mount Goliath). Now Timeliopsis fulvigula meyeri (Salvadori, 1896). See Diamond, 1972: 350–351, Coates, 1990: 299, and Higgins et al., 2008: 629. HOLOTYPE: AMNH 691147, adult male, collected on Mount Goliath, 04.40S, 139.52E (USBGN, 1982a), Papua Province, Indonesia, on 28 (not 20) January 1911, by Albert S. Meek (no. 5229). From the Rothschild Collection. COMMENTS: Mayr gave Meek’s unique field number of the holotype in the original description, but miscopied the date; he did not say how many specimens he examined. Two paratypes, both collected on Mount Goliath, came to AMNH with the Rothschild Collection: AMNH 691148 (Meek no. 5300), adult male, collected 5 February 1911; AMNH 691149 (5138), adult male, collected 20 January 1911. These three specimens are the ones Rothschild and Hartert (1913: 515) reported that Meek collected on Mount Goliath.
description: Published as part of Mary, 2011, Type Specimens Of Birds In The American Museum Of Natural History Part 9. Passeriformes: Zosteropidae And Meliphagidae, pp. 1-193 in Bulletin of the American Museum of Natural History 2011 (348) on page 44
description: {"references": ["Mayr, E. 1931 c. Die Vogel des Saruwaged- und Herzoggebirges (NO-Neuguinea). Mitteilungen aus dem Zoologische Museum in Berlin 17: 639 - 723.", "Diamond, J. M. 1972. Avifauna of the Eastern Highlands of New Guinea. Publications of the Nuttall Ornithological Club, no. 12. Cambridge, MA: Nuttall Ornithological Club, 438 pp.", "Coates, B. J. 1990. The birds of Papua New Guinea. Vol. 2. Passerines. Alderley, Queensland: Dove Publications, 576 pp.", "Higgins, P. J., L. Christidis, and H. A. Ford. 2008. Meliphagidae (honeyeaters). In J. del Hoyo, A. Elliott, and D. Christie (editors), Handbook of birds of the world, vol. 13, Penduline-tits to shrikes: 498 - 691. Barcelona: Lynx Edicions, 879 pp., 60 pls., 536 photographs.", "Rothschild, W., and E. Hartert. 1913. List of the collections of birds made by Albert S. Meek in the lower ranges of the Snow Mountains, on the Eilanden River, and on Mount Goliath during the years 1910 and 1911. Novitates Zoologicae 20: 473 - 527."]}
title: Corporatisation and the performance of hospitals in the Kingdom of Saudi Arabia: A panel study, 1979-2014
Creators: name: Nasrulddin, Vivian MohammedSaleh
Publisher: name: Edinburgh Napier University
Year: 2020

description: This thesis analyses whether the movement towards privatisation (through various phases of corporatisation, changes in management and operation) has been associated with an improvement in the performance (efficiency, effectiveness, and quality) of the Ministry of Health (MoH) public hospitals in the Kingdom of Saudi Arabia (KSA), 1979 to 2014. The study argues that changes in management and operational framework, in different corporatisation phases, would be associated with the performance of hospitals. Accordingly, the study tests whether the alleged theoretical benefits of corporatisation identified in the literature were reflected in the data gathered. Research questions are addressed by developing deductively and testing hypotheses via econometric models. The data identifies which KSA hospital management/corporatisation phase is generally more efficient, and which provides the best overall performance indicators across the study period. The econometric methods employed are Data Envelope Analysis, Stochastic Frontier Analysis, Panel Data analysis, and Least Squares Regression Analysis. The findings suggest that, taking into account the efficiency, effectiveness, and quality aspects of hospital performance, fully corporatised hospitals (on average) achieve relatively better overall performance. However large hospital efficiencies may be inapplicable to small rural hospitals and each hospital should be considered on a case-by-case basis in additional to being part of an overall programme at the national level. Despite this caveat, broad recommendations are proposed which may help to increase the performance of hospitals in the KSA.
Effect of Timing and Voltage Dependency on Inverter Sizing
Creators: name: Zhu, J.
name: Roy, J.
name: Bründlinger, R.
name: Guérin De Montgareuil, A.
name: David, M.
name: Mühlberger, T.
name: Betts, T.R.
name: Gottschalg, R.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Components for PV Systems
Balance of System Components

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 2758-2764
description: The effects of environmental data time steps and inverter’s voltage dependency on optimum inverter sizing are investigated in this paper. Three sites in the Europe with the specific climates and two detailed inverter characteristics including its dependence on the DC voltage during the operation are taken into account to demonstrate the differences in the inverter sizing required to allow for the site and inverter specifics. A model of a PV system linked to an inverter is developed to assess and optimise how the different factors influence the correct sizing of a given PV system. The environmental data with time resolution higher than 10 minutes is recommended since low frequency data (hourly data), which might ignore the irradiance peaks and underestimate up to 2.7% of total annual energy at high irradiances, cannot guarantee the correct sizing ratio of inverter. Inverter efficiencies change up to 1 to 3% as a function of input voltage which needs to be considered in inverter sizing. The overall inverter behaviour is also crucial in order to size appropriately. It is shown that some inverters perform better with undersizing, some better with oversizing.
Degrees of self-maps of products
Creators: name: Neofytidis, Christoforos
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Every closed oriented manifold $M$ is associated with a set of integers $D(M)$, the set of self-mapping degrees of $M$. In this paper we investigate whether a product $M\times N$ admits a self-map of degree $d$, when neither $D(M)$ nor $D(N)$ contains $d$. We find sufficient conditions so that $D(M\times N)$ contains exactly the products of the elements of $D(M)$ with the elements of $D(N)$. As a consequence, we obtain manifolds $M\times N$ that do not admit self-maps of degree $-1$ (strongly chiral), that have finite sets of self-mapping degrees (inflexible) and that do not admit any self-map of degree $dp$ for a prime number $p$. Furthermore we obtain a characterization of odd-dimensional strongly chiral hyperbolic manifolds in terms of self-mapping degrees of their products.
description: 10 pages; v2: structure modified, improved exposition; v3: small edits, to appear in International Mathematics Research Notices
Assessment of Storage Ageing in Different Types of PV Systems: Technical and Economical Aspects
Creators: name: Lemaire, E.
name: Mattera, F.
name: Delaille, A.
name: Malbranche, P.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Components for PV Systems
Balance of System Components

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 2765-2769
description: Successful implementation of storage within PV systems requires a reliable life time estimation, to ensure the economical profitability of projects and, not negligibly, the user satisfaction. However, the main difficulty is that among the different components of a PV system, the storage part is one of the shortest lived, and whose life time is the most difficult to predict. In this paper, the methodology for assessing the storage ageing is described for stand-alone systems, first for technical aspects dealing with accelerated ageing tests, then for economical aspects with the comparison of storage cost of ownership. Finally, we examine how this approach can be transposed to the case of storage in grid-connected systems.
Melilestes megarhynchus subsp. stresemanni Hartert 1930
Creators: name: , Mary
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Meliphagidae
Melilestes

description: Melilestes megarhynchus stresemanni Hartert Melilestes megarhynchus stresemanni Hartert, 1930b: 45 (Hollandia). Now Melilestes megarhynchus stresemanni Hartert, 1930. See Higgins, et al., 2008: 630. HOLOTYPE: AMNH 294370, adult male, collected at Jayapura (5 Hollandia), 02.32S, 140.42E (USBGN, 1982a), Papua Province, Indonesia, on 13 October 1928, by Ernst Mayr (no. 2835). COMMENTS: Hartert cited Mayr’s unique field number of the holotype in the original description, noting that Mayr collected two males at Hollandia and a female in the Cyclops Mountains; he also included in his type series Doherty’s specimens from Takar in the Rothschild Collection. As explained under the previous form, all of Mayr’s specimens are now in AMNH. Paratypes of stresemanni are: AMNH 693735–693738, three males and one female from Takar collected by Doherty; AMNH 693739, male from Terfia (5 Tarfia, near Takar) collected by Doherty; AMNH 693740, female from the Cyclops Mountains collected by Mayr; AMNH 693741, male from Hollandia collected by Mayr.
description: Published as part of Mary, 2011, Type Specimens Of Birds In The American Museum Of Natural History Part 9. Passeriformes: Zosteropidae And Meliphagidae, pp. 1-193 in Bulletin of the American Museum of Natural History 2011 (348) on page 45
description: {"references": ["Hartert, E. 1930 b. III. List of the birds collected by Ernst Mayr. Novitates Zoologicae 36: 27 - 128."]}
Investigation of Cu(In,Ga)Se2 Thin Film Prepared by Sputtering Process
Creators: name: Gremenok, V.F.
name: Mudryi, A.V.
name: Karotki, A.V.
name: Refahati, N.
name: Ivanov, V.A.
name: Yakushev, M.V.
name: Luckert, F.
name: Martin, R.W.
name: Song, Y.W.
name: Sang-Ho, H.
Publisher: name: WIP
Year: 2011
Subjects: Thin Film Solar Cells
CIS and Related Ternary and Quaternary Thin Film Solar Cells

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 2900-2903
description: The Cu(In,Ga)Se2 (CIGS) thin films were produced on soda-lime glass substrates by a two-step
process involving sequential sputtering Cu-In-Ga precursors followed by their selenisation using Se vapour.
CIGS films were examined using a range of experimental techniques. The elemental composition of layers,
their crystalline structure and optical properties were studied. The band gap energy Eg of CIGS films with
different elemental composition Ga/(Ga+In) was determined by employing optical absorption measurements.
Photoluminescence at temperature 4.2 K were also used to examine the electronic properties and defect nature.
An Automated Method to Reduce Noise of Admittance Spectra Allowing Assessment of a Large Number of Complicated Spectra
Creators: name: Decock, K.
name: Khelifi, S.
name: Burgelman, M.
Publisher: name: WIP
Year: 2011
Subjects: Thin Film Solar Cells
CIS and Related Ternary and Quaternary Thin Film Solar Cells

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 2922-2925
description: In thin solar cells often defect level distributions are present rather than discrete defects. Calculating
the derivative of the capacitance to the frequency, the defect density can be visualized in a straightforward way. Due
to the need of a numerical differentiation method and of merging capacitance frequency measurements at different
temperatures, the resulting spectra exhibit noise which is not easily eliminated using standard smoothing algorithms.
This hinders an easy comparison of different measurement results.
An algorithm is presented which is able to remove this noise and to calculate error bars on the final result. The details
and possibilities of this algorithm, which is based on the comparison of the results of several differentiation methods,
are demonstrated for capacitance frequency measurements under different bias voltages of a Cu(In,Ga)Se2-based thin
film solar cell.
Moreover this algorithm allows to summarize and examine a lot of measurement results in a fast and unambiguous
way, without making many assumptions or simplifications.
A Metamodel for SDL-2000 in the Context of Metamodelling ULF
Creators: name: Fischer, Joachim
name: Piefel, Michael
name: Scheidgen, Markus
Publisher: name: Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II
Year: 2005
Subjects: subject: SDL
subject: ULF
subject: metamodel
subject: 004 Informatik

description: Today the syntax of many languages is defined by using context-free grammars. These syntax definitions suffer from a major drawback: grammars do not allow the definition of abstract, reusable concept definitions. Especially in families of related languages, where multiple languages often share the same concepts, this limitation leads to unnecessary reproduction of concept definitions and a missing shared base for these related languages. Metamodels can contain inheritance hierarchies of concepts; thus multiple specifications can reuse and refine existing shared concept definitions. Therefore we propose a method to develop metamodels from existing syntax definitions. We explain our method by applying it to SDL-2000. The method starts with a mapping from BNF grammars into simple preliminary metamodels. Then, by supplying a relation between elements of these simple metamodels and abstract concepts, these metamodels are automatically transformed into metamodels that use existing descriptions of abstract concepts and thus allow a shared basis of common abstract concepts definitions.
TaqIB polymorphism in cholesterol ester transfer protein (CETP) gene predicts future cardiovascular death in patients experiencing an acute coronary syndrome
Creators: name: Pillois, Xavier
name: Thi, Nahm Phuong Do
name: Reynaud, Annabel
name: Benchimol, Daniel
name: Lagrost, Laurent
name: Bonnet, Jacques
Publisher: name: Kooperation de Gruyter
Year: 2009

description: Background: Cholesterol ester transfer protein (CETP) plays a pivotal role in the remodelling of triglyceride (TG)-rich and high-density lipoprotein (HDL) particles. Sequence variations in the CETP gene may interfere with coronary atherosclerosis. However, clinical studies of various CETP polymorphisms have shown controversial data in coronary artery outcome. We aimed to investigate whether TaqIB CETP gene polymorphism could predict clinical outcome in a prospective cohort of patients hospitalized for an acute coronary syndrome (ACS). Methods: Two hundred and seventy consecutive Caucasian patients hospitalized for an ACS, and having a significant coronary artery disease in at least one major vessel (stenosis >50%), were prospectively enrolled and followed for 57 months. The mean age was 65.1±12.5 years, and 77% were males. One hundred and thirty-nine patients (51.5%) suffered from unstable angina at inclusion and 131 patients (48.5%) presented with an acute myocardial infarction (MI). The follow-up data were obtained from questionnaires. The major recurrent events recorded were 32 deaths comprising 28 cardiovascular deaths and 49 combined cardiovascular events (28 cardiovascular deaths, 19 non-fatal ACS and 2 non-fatal strokes). CETP genotyping was performed using a restriction fragment length polymorphism based method. Results: A significant relation was found between B2B2 genotype and combined cardiovascular end-point (p<0.02), mainly driven by a link with cardiovascular death (p<0.05). The hazard risk ratio for cardiovascular death associated with B2B2 genotype was 2.2 [95% confidence interval (CI): 1.01–4.94, p<0.05]. In multivariate analyses, no modification except for a significant interaction with statin therapy was observed by inclusion of potential confounders for the association of B2B2 genotype with cardiovascular death. Conclusions: These results suggest that patients homozygous for the B2 allele and not taking statin had a strong increase of recurrent cardiovascular event after an initial acute coronary event. This cardiovascular risk seems to be corrected with statin therapy. Clin Chem Lab Med 2009;47:1039–46.
Rear Side Versus Front Side Laser Edge Isolation: A Detailed Theoretical and Experimental Investigation
Creators: name: Doering, M.
name: Meyer, K.
name: Kaps, A.
name: Krokoszinski, H.-J.
name: Eschrich, H.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1778-1781
description: We investigate an industrial state of the art solar c-Si cell including a both sided phosphorous diffusion and
aluminum paste on the back side forming the BSF and overcompensates the n-doped region. Front and back side contacts
are connected by the n-doped layer around the edge, requiring edge isolation. This is usually done by wet chemical
etching or laser processes. Laser edge isolation is usually done on the front side of the solar cell, but it is also possible on
back side. Only very little work has been done so far to answer the question on which side and with which kind of
technique the isolation should be accomplished to obtain the highest efficiency [1, 2, 3]. Former studies showed higher
efficiency for front side edge isolation [3], but a detailed theoretical analysis and experimental evidence using up to date
laser isolation technique is still missing. In this paper we give an answer to this question on a broad theoretical and
experimental basis.
Testing Gravity Using Galaxy Clusters: New Constraints on Beyond Horndeski Theories
Creators: name: Sakstein, Jeremy
name: Wilcox, Harry
name: Bacon, David
name: Koyama, Kazuya
name: Nichol, Robert C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Beyond Horndeski class of alternative gravity theories allow for Self-accelerating de-Sitter cosmologies with no need for a cosmological constant. This makes them viable alternatives to $Λ$CDM and so testing their small-scale predictions against General Relativity is of paramount importance. These theories generically predict deviations in both the Newtonian force law and the gravitational lensing of light inside extended objects. Therefore, by simultaneously fitting the X-ray and lensing profiles of galaxy clusters new constraints can be obtained. In this work, we apply this methodology to the stacked profiles of 58 high-redshift ($ 0.1
description: 11 pages, 1 figure. Updated to reflect published version, minor changes from previous version
title: 3D printing education as a means of building confidence and preparing children for skills considered necessary for the 21st century: A grounded theory study verified by empirical research
Creators: name: Milne, Denise Elizabeth
Publisher: name: Edinburgh Napier University
Year: 2020

description: This thesis aims to demonstrate children’s engagement with 3D printing technologies in 3D printing workshops through a large study of children. This will provide qualitative and empirical evidence which supports the benefits of making for children and advocates the use of 3D printing technologies within educational settings. This thesis challenges the common narrative that making is a fundamental human trait. It proposes that making should be understood on a spectrum between making for necessity and making for leisure. This illustrates the diversity of experiences making offers. It provides a thorough and informed perspective on how 3D printing can be used successfully in project-based learning within classroom settings. The study presents empirical data from 3011 participants across 247 workshops and shows which reported behaviours are common to all 3D printing workshops. Further, this study demonstrates the impact the workshop environment has on these behaviours. Additionally, the analysed data shows that motivations for making can be categorised as social-based or learning-based. This provides maker-spaces with an alternative perspective of the motivations to participate in making and to promote access. This thesis presents the first empirical study of children and making and is also the largest known study at time of writing related to this field. It offers an alternative interpretation of maker practices to make making more inclusive and presents evidence that 3D printing pens are valuable tools for introducing children to 3D printing. Furthermore, a sample lesson plan is included in the appendix which highlights how 3D printing can be successfully included in the classroom. Finally, proposes, using empirical data, that 3D printing workshops develop skills considered essential for 21st Century learners.
Study of a Quinhydrone Chemical Passivation of Silicon Surface for Carrier Bulk-Lifetime Measurements
Creators: name: Solcansky, M.
name: Vanek, J.
name: Poruba, A.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1785-1788
description: This work deals with examination of quinhydrone/methanol solution for chemical passivation of silicon
surfaces. The main objective of this work is to identify the parameters of other quinhydrone solutions with different
concetrations as compared with a referential quinhydrone/methanol solution with a concentration of 0.07 mol/dm³,
marked QM007 [1]. Silicon textured wafers passivated by the QM007 solution exhibit very good long-time stability, but
relative slow startup of passivation abilities. For the textured Si wafers it takes about 10 minutes, it is important to try to
eliminate this time dependence. We will show the influence of increased concentration of quinhydrone solution on
startup abilities and temporal stability of the passivation layer. The last objective is to identify the influence of
illumination and temperature on the properties of quinhydrone chemical passivation. The results confirm the influence of
increased concentration quinhydrone on the startup and temporal stability of the passivation layer and the effect for
textured silicon wafers. In conclusion, the influence of an illumination and the temperature on the properties of the
passivating solution QM007 is discussed.
Some new results on sample path optimality in ergodic control of diffusions
Creators: name: Arapostathis, Ari
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: We present some new results on sample path optimality for the ergodic control problem of a class of non-degenerate diffusions controlled through the drift. The hypothesis most often used in the literature to ensure the existence of an a.s. sample path optimal stationary Markov control requires finite second moments of the first hitting times $τ$ of bounded domains over all admissible controls. We show that this can be considerably weakened: ${\mathrm E}[τ^2]$ may be replaced with ${\mathrm E}[τ\ln^+(τ)]$, thus reducing the required rate of convergence of averages from polynomial to logarithmic. A Foster-Lyapunov condition which guarantees this is also exhibited. Moreover, we study a large class of models that are neither uniformly stable, nor have a near-monotone running cost, and we exhibit sufficient conditions for the existence of a sample path optimal stationary Markov control.
description: 10 pages
First-order post-Newtonian analysis of the relativistic tidal effects for satellite gradiometry and the Mashhoon-Theiss anomaly
Creators: name: Xu, Peng
name: Paik, Ho Jung
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: With continuous advances in technology, future satellite gradiometry missions will be capable of performing precision relativistic experiments and imposing constraints on modern gravity theories. To this end, the full first-order post-Newtonian tidal tensor under inertially guided and Earth-pointing local frames along post-Newtonian orbits is worked out. The physical picture behind the "Mashhoon-Theiss anomaly" is explained at the post-Newtonian level. The relativistic precession of the local frame with respect to the sidereal frame will produce modulations of Newtonian tidal forces along certain bases, which gives rise to two different kinds of secular tidal tensors. The measurements of the secular tidal force from the frame-dragging effect is also discussed.
description: Typos in Eq. (11) and Eq. (22b) are corrected. 10 pages, 3 figures
Melilestes novae-guineae subsp. flaviventris Rothschild and Hartert
Creators: name: , Mary
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Meliphagidae
Melilestes

description: Melilestes novae-guineae flaviventris Rothschild and Hartert Melilestes novae-guineae flaviventris Rothschild and Hartert, 1911a: 44 (Tungei Bark, Kobrur, Aru Islands). Now Toxorhamphus novaeguineae flaviventris (Rothschild and Hartert, 1911). See Salomonsen, 1967: 341, Dickinson, 2003: 452, and Gregory, 2008: 338. HOLOTYPE: AMNH 693603, adult male, collected at Tungei Bark, Kobroor (5 Kobrur) Island, 06.12S, 134.32E (USBGN, 1982a), Aru Islands, Papua Province, Indonesia, on 27 August 1900, by Heinrich Kühn (no. 2380). From the Rothschild Collection. COMMENTS: In the original description, Rothschild and Hartert gave Kühn’s unique field number of the holotype and said that the form occurred on Kobrur, Trangan, and Wokan islands in the Aru Islands. Paratypes in AMNH are: collected by Capt. Caley Webster, Wokan Island, AMNH 693599, female, 2 June 1896; collected by H. Kühn, Trangan Island, AMNH 693600, male, 14 September 1900; Tungei Bark, Kobror Island, AMNH 693601, 693602, males, 24– 26 August 1900; Wokan Island, AMNH 693604–693606, two males, one female, 26 September–1 October 1900. In Dickinson (2003: 452) and Gregory (2008: 338), the genus Toxorhamphus was included in the Melanocharitidae.
description: Published as part of Mary, 2011, Type Specimens Of Birds In The American Museum Of Natural History Part 9. Passeriformes: Zosteropidae And Meliphagidae, pp. 1-193 in Bulletin of the American Museum of Natural History 2011 (348) on page 45
description: {"references": ["Rothschild, W., and E. Hartert. 1911 a. [Mr. Rothschild and Dr. Hartert also exhibited a new form of spider-hunter, which they proposed to name]. Bulletin of the British Ornithologists' Club 27: 44 - 45.", "Salomonsen, F. 1967. Family Meliphagidae. In R. A. Paynter, Jr (editor), Check-list of birds of the world, vol. 12: 338 - 450. Cambridge, MA: Museum of Comparative Zoology, ix + 495 pp.", "Dickinson, E. C. (editor). 2003. The Howard and Moore complete checklist of the birds of the world. 3 rd ed. London: Christopher Helm, 1039 pp.", "Gregory, P. A. 2008. Family Melanocharitidae (Berrypeckers and Longbills). In J. del Hoyo, A. Elliott, and D. Christie (editors), Handbook of birds of the world, vol. 13, Penduline-tits to shrikes: 322 - 340. Barcelona: Lynx Edicions, 880 pp., 60 pls., 536 photographs."]}
Synthesis of Polar Ordered Oxynitride Perovskite
Creators: name: Ahart, Muhtar
name: Somayazulu, Maddury
name: Vadapoo, Rajasekarakumar
name: Holtgrewe, Nicholas
name: Meng, Yue
name: Konopkova, Zuzana
name: Hemley, Russell J.
name: Cohen, R. E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: For decades, numerous attempts have been made to produce polar oxynitride perovskites, where some of the oxygen are replaced by nitrogen, but a polar ordered oxynitride has never been demonstrated. Caracas and Cohen studied possible ordered polar oxynitrides within density functional theory (DFT) and found a few candidates that were predicted to be insulating and at least metastable. YSiO2N stood out with huge predicted polarization and nonlinear optic coefficients. In this study, we demonstrate the synthesis of perovskite-structured YSiO2N by using a combination of a diamond anvil cell and in-situ laser heating technique. Subsequent in-situ X-ray diffraction, second harmonic generation, and Raman scattering measurements confirm that it is polar and a strong nonlinear optical material, with structure and properties similar to those predicted by DFT.
description: 7 pages, 3 figures and a table
The Effect of Hydrogenation on Photovoltaic Performance of Silicon Thin Films Grown on Low Grade Silicon Substrates
Creators: name: Danielsson, D.M.
name: Gudmundsson, J.T.
name: Svavarsson, H.G.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
Thin Film Crystalline Silicon Solar Cells and Wafer Equivalents

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2541-2543
description: Shallow p-n junctions for photovoltaic applications were prepared by growing thin n-type Si films on p-type
metallurgical grade silicon (MG-Si) substrate in a liquid solution of arsenic doped gallium/indium solution. MG-Si
has much higher impurity concentrations than traditional solar grade silicon but is here being used as low-cost
alternative. The as-grown film showed negligible photovoltaic response. A post-growth exposure of the as-grown p-n
junctions to an inductively coupled H2/Ar discharge plasma resulted in an active photovoltaic device with open
circuit voltage VOC of more than 500 mV. Furthermore, an increase in the minority carrier lifetime was observed. The
short-circuit current density JSC indicated low efficiency in accordance to the high defect concentration of the impure
substrate.
Sets with dependent elements: A formalization of Castoriadis' notion of magma
Creators: name: Tzouvaras, Athanassios
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 00A69, 06A06

description: We present a formalization of collections that Cornelius Castoriadis calls ``magmas'', especially the property which mainly characterizes them and distinguishes them from the usual cantorian sets. It is the property of their elements to {\em depend} on other elements, either in a one-way or a two-way manner, so that one cannot occur in a collection without the occurrence of those dependent on it. Such a dependence relation can be represented by a pre-order relation $\preccurlyeq$ Then, working in a mild strengthening of the theory ${\rm ZFA}$, where $A$ is an infinite set of atoms equipped with a primitive pre-ordering $\preccurlyeq$, the class of magmas over $A$ is represented by the class $LO(A,\preccurlyeq)$ of nonempty open subsets of $A$ with respect to the lower topology of $\langle A,\preccurlyeq\rangle$. Next the pre-ordering $\preccurlyeq$ is shifted (by a kind of simulation) to a pre-ordering $\preccurlyeq^+$ on ${\cal P}(A)$, which turns out to satisfy the same non-minimality condition as well, and which, happily, when restricted to $LO(A,\preccurlyeq)$ coincides with $\subseteq$. This allows us to define a hierarchy $M_α(A)$, along all ordinals $α\geq 1$, the``magmatic hierarchy'', such that $M_1(A)=LO(A,\preccurlyeq)$, $M_{α+1}(A)=LO(M_α(A),\subseteq)$, and $M_α(A)=\bigcup_{β<α}M_β(A)$, for a limit ordinal $α$. For every $α\geq 1$, $M_α(A)\subseteq V_α(A)$, where $V_α(A)$ are the levels of the universe $V(A)$ of ${\rm ZFA}$. The class $M(A)=\bigcup_{α\geq 1}M_α(A)$ is the ``magmatic universe above $A$.''
description: 24 pages
The paradoxical zero reflection at zero energy
Creators: name: Ahmed, Zafar
name: Sharma, Vibhu
name: Sharma, Mayank
name: Singhal, Ankush
name: Kaiwart, Rahul
name: Priyadarshini, Pallavi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Usually, the reflection probability $R(E)$ of a particle of zero energy incident on a potential which converges to zero asymptotically is found to be 1: $R(0)=1$. But earlier, a paradoxical phenomenon of zero reflection at zero energy ($R(0)=0$) has been revealed as a threshold anomaly. Extending the concept of Half Bound State (HBS) of 3D, here we show that in 1D when a symmetric (asymmetric) attractive potential well possesses a zero-energy HBS, $R(0)=0$ $(R(0)<<1)$. This can happen only at some critical values $q_c$ of an effective parameter $q$ of the potential well in the limit $E \rightarrow 0^+$. We demonstrate this critical phenomenon in two simple analytically solvable models which are square and exponential wells. However, in numerical calculations even for these two models $R(0)=0$ is observed only as extrapolation to zero energy from low energies, close to a precise critical value $q_c$. By numerical investigation of a variety of potential wells, we conclude that for a given potential well (symmetric or asymmetric), we can adjust the effective parameter $q$ to have a low reflection at a low energy.
description: 10 pages 6 figures and one Table, Revised presentation