102,819 research outputs found
Carl Mez & Söhne, A.-G., Wien, Näh- und Stickseidenfabrik, Gries-Bozen von der Erzh. Heinrich-Promenade
No full textCARL MEZ & SÖHNE, A.-G., WIEN, NÄH- UND STICKSEIDENFABRIK, GRIES-BOZEN VON DER ERZH. HEINRICH-PROMENADE
Carl Mez & Söhne, A.-G., Wien, Näh- und Stickseidenfabrik, Gries-Bozen von der Erzh. Heinrich-Promenade ( -
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Extending the Theory of Owicki and Gries with a Logic of Progress
No full textThis paper describes a logic of progress for concurrent programs. The logic is based on that of UNITY, molded to fit a sequential programming model. Integration of the two is achieved by using auxiliary variables in a systematic way that incorporates program counters into the program text. The rules for progress in UNITY are then modified to suit this new system. This modification is however subtle enough to allow the theory of Owicki and Gries to be used without change
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3346: Samuel G. Freedman, author, 2013
No full textPhotograph of author Samuel G. Freedman, at NT Daily Slash meeting in the Mayborn School of Journalism at UNT
The potential of deciduous and permanent bovine enamel as substitute for deciduous and permanent human enamel: Erosion-abrasion experiments
No full textAim of the present study was to compare toothbrushing abrasion of eroded human and bovine enamel utilizing a toothpaste slurry. The surfaces of each 36 teeth from cattle and calves and from each 36 human wisdom teeth and deciduous teeth were polished. Each 12 specimens from the respective tooth type were used for assessing toothbrushing abrasion only (A), erosion only (E) and the combination of erosion and toothbrushing abrasion (EA). The EA samples were subjected to 20 cycles comprising a demineralization/remineralization procedure directly followed by toothbrushing abrasion (100 strokes, 300 g load, toothpaste slurry: 3 ml artificial saliva mixed with 1 g dentifrice). Demineralization in form of erosion was performed with 1% citric acid (1 min), remineralization. with artificial saliva (15 min). Between the cycles, the samples were stored in artificial saliva. Wear of the treated surfaces with reference to untreated areas was determined profilometrically. The samples subjected to abrasion only (A) did not show a significantly different wear between the different kinds of teeth. The comparisons of substance loss between teeth of different species revealed that hard tissue loss of the human deciduous teeth was significantly lower as compared to calves' teeth after both erosion and erosion-abrasion. Also, both erosion only and erosion-abrasion caused higher enamel loss in cattle's teeth than in human wisdom teeth. It is concluded that human eroded enamel offers better resistance against brushing than bovine enamel. (C) 2007 Elsevier Ltd. All rights reserved
The Right to Strike under the United States Constitution: Theory, Practice, and Possible Implications for Canada
No full textAnswering critics of the Canadian Supreme Court's judgment in B.C. Health, the author argues that the Court laid the foundation for a principled and durable doctrine protecting constitutional labour rights, one that goes directly to the heart of the matter — the inequality of workers’ power in the employment relation. In the author’s view, two paths could lead from B.C. Health to the recognition of Charter protec- tion for a right to strike: one that treats the right as an accessory to col- lective bargaining, and one that upholds the right directly on the basis of the Charter values of equality and participation. The author supports the latter approach, contending that constitutional rights should be defined in relation to fundamental values, in a way that is not contingent on time-bound or fact-sensitive assessments about the role of strikes within a particular collective bargaining regime. Although a Charter right to strike may involve the courts in difficult choices about when to defer to legislative policy decisions, and courts may lack the institutional capac- ity to deal effectively with labour law issues, the author points out that judges can look to ILO standards for expert guidance. Noting that the U.S. experience in this area might be of considerable use to Canadians, the author concludes by providing an overview of American case law concerning a constitutional right to strike.Peer reviewe
Program Schemes with Pushdown Stores
No full textWe attempt to characterize classes of schemes allowing pushdown stores, building on an earlier work by Constable and Gries [1]. We study the effect (on the computational power) of aloowing one, two, or more pushdown stores, both with and without the ability to detect when a pds is empty. A main result is that the use of using one pds is empty. A main result is that the use of using one pds is computationally equivalent to allowing recursive functions. We also study the effect of adding the ability to do integer arithmetic, and multi-dimensional arrays. Keywords: Program schemes, schemata, pushdown stores, stacks, recursion, programming languages
LaFeO₃/g-C₃N₄ heterostructured photocatalysts for hydrogen production
No full textL’hydrogène est un vecteur énergétique d’avenir en remplacement des hydrocarbures fossiles, à condition d’avoir une production majoritairement décarbonée. L’une des solutions les plus prometteuses pour générer l’hydrogène propre et durable est la décomposition photochimique de l’eau à partir de l’énergie solaire. Dans ce contexte, cette thèse porte sur l’élaboration et l’optimisation d’un photocatalyseur stable et composé d’éléments abondants. LaFeO₃ est un matériau pérovskite semi-conducteur présentant une excellente stabilité chimique et qui absorbe une large part visible du spectre solaire, mais ses propriétés photocatalytiques sont limitées par un faible transport des électrons. Pour améliorer son activité, une hétérostructure associant LaFeO₃ à g-C₃N₄ a été formée. g-C₃N₄ est un semi-conducteur organique 2D avec des propriétés optiques, structurelles et électroniques exceptionnelles. Leur association a permis d’augmenter significativement l’activité photocatalytique par une amélioration de la séparation et du transfert des porteurs de charge. Deux méthodes de production de H₂ ont été étudiées : par photocatalyse (PC) et photoélectrocatalyse (PEC). Les photoélectrodes du dispositif PEC ont été élaborées par pulvérisation cathodique magnétron et les nanoparticules dispersées en solution du dispositif PC ont été synthétisées par voie sol-gel. L’insertion d’une couche de g-C₃N4, déposée par spin-coating, sous le film de LaFeO₃ a permis pour la première fois de former cette hétérojonction en films minces, tandis que l’association par sonication des particules de LaFeO₃ et g-C₃N₄ a permis la création de l’hétérojonction en photocatalyseurs dispersés. L’influence de la composition des photoélectrodes a également été étudiée dans le cas de films non-stœchiométriques et par insertion d’éléments métalliques additionnels.Hydrogen is a promising energy carrier for replacing fossil fuels, under the conduction of having a mainly low carbon production. One of the most promising solution to generate clean and durable hydrogen is water splitting from solar energy. This manuscript focuses on the development and optimization of an abundant and stable photocatalyst. LaFeO₃ is a perovskite semi-conductor material showing and excellent chemical stability and that absorbs a large part in the visible spectra, although a low electron transfer limits its photocatalytic properties. To improve its activity, a heterostructure associating LaFeO₃ with g-C₃N₄ was realised. g-C₃N₄ is an organic semi-conductor with outstanding optical, structural, and electronic properties. Their association led to a significant increase in the photocatalytic activity by an increase in the separation and transfer of charge carriers. Two methods for H₂ production were studied: photocalysis (PC) and photoelectrocatalysis (PEC). Photoelectrodes of PEC dispositive were elaborated by magnetron sputtering and nanoparticles dispersed in solution of PC dispositive were synthesised using sol-gel. The insertion of a layer of g-C₃N₄, deposited by spin coating, below the LaFeO₃ films allowed for the first time to prepare this heterojunction using thin films, while the sonication of particles of LaFeO₃ and g-C₃N₄ allowed creating a heterojunction of dispersed photocatalysts. The impact of the composition of photoelectrodes was also studied for non-stoichiometric films and by inserting additional metallic elements
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