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Search Results: 1 - 10 of 918 matches for " Ott "
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Solubility of Supercritical CO2 in Polystyrene during Foam Formation via Statistical Associated Fluid Theory (SAFT) Equation of State  [PDF]
Brian A. Ott, G. Caneba
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2010, DOI: 10.4236/jmmce.2010.95029
Abstract: The use of supercritical fluids, such as CO2, for polymer foam formation has become popular in the last decade. These physical blowing agents are environmentally responsible, and are able to provide certain processing advantages during foam formation. In order to be able to understand foam formation under relatively high pressures and temperatures, thermodynamic phase equilibrium analysis is required coupled with a good equation of state. The Statistical Associated Fluid Theory (SAFT) equation of state (EOS) is studied in detail for the carbon dioxide/polystyrene system, under supercritical CO2 conditions. The SAFT EOS is found to perform better than the Soave-Redlich-Kwong (SRK) EOS, especially when considering liquid phase compositions and densities. Experimental data from the literature is used to validate model parameters cited in the literature for polystyrene-CO2 binary systems under supercritical conditions. The analysis is done with the assumption that the vapor phase is pure CO2 and in equilibrium with the liquid CO2-polystyrene condensed phase.
Descri??o de duas espécies novas de Opopaea do sul do Brasil (Oonopidae, Araneae)
Ott, Ricardo;
Iheringia. Série Zoologia , 2003, DOI: 10.1590/S0073-47212003000200008
Abstract: two new species, opopaea viamao and o. ita, are described from the states of rio grande do sul and santa catarina, brazil, respectively. both species present reduction or loss of posterior median eyes, a possible synapomorphic caracter.
Neodrassex, a new genus of the Leptodrassex group (Araneae, Gnaphosidae) from South America
Ott, Ricardo;
Iheringia. Série Zoologia , 2012, DOI: 10.1590/S0073-47212012000300015
Abstract: the new genus neodrassex is proposed to include two new species of gnaphosidae from brazil. neodrassex aureus sp. nov. is described from amazonas, paraná and rio grande do sul states, and n. iguatemi sp. nov. is described from paraná state. neodrassex gen. nov. is characterized by small size, pale coloration, large anterior median eyes surrounded by black pigmentation, absence of a dorsal abdominal scutum in males and by the cheliceral dentition with 2-3 teeth on the promargin and 2-4 on the retromargin. the new genus is tentatively placed at the leptodrassex group.
Service robotics: an emergent technology field at the interface between industry and services
Ingrid Ott
Poiesis & Praxis , 2012, DOI: 10.1007/s10202-012-0110-9
Abstract: Der Beitrag analysiert die konomischen Implikationen von Service-Robotik als künftig bedeutendes Technologiefeld. Die überlegungen werden hierbei in die globalen Trends eingebunden, fokussieren auf die Interdependenzen zwischen Dienstleistung und Industrie, wobei es nicht nur um die Bereitstellung einer Dienstleistung an sich geht, sondern auch der Innovationsprozess einbezogen wird. Es wird argumentiert, dass die vielf ltigen Interdependenzen verbunden mit den heterogenen Einsatzfeldern der Service-Roboter es erforderlich machen, dass die Aussagen kontextualisiert erfolgen. Insgesamt wird erwartet, dass vom Feld der Service-Robotik positive Arbeitsmarkteffekte ausgehen, wobei die Anforderungen an das Bildungsniveau der Besch ftigten steigen werden. Weiterhin wird analysiert, welche Herausforderungen zu bew ltigen sind, wenn es darum geht, ein neues Technologiefeld zu bewerten und weiter zu entwickeln und es werden einige Politikimplikationen abgeleitet.
Properties of melt and thermal processes during solidification in jewellery casting
Dieter Ott
Gold Bulletin , 2000, DOI: 10.1007/BF03215479
Abstract: A survey is made of the significant thermal properties pertaining to liquid and solidifying jewellery alloys, and some properties of the investment are also considered. Values found in the literature, or measured in our own investigations are used together with estimates. A relatively simple model for solidification is presented. Some parameters such as volume/surface area ratio, superheat and solidification temperature are discussed. The solidification behaviour of a simplified ring is investigated in more detail using the model. In addition, some observations were made whilst casting spirals.
Digital publishing: tools and products
Wilhelm Ott
Poiesis & Praxis , 2008, DOI: 10.1007/s10202-007-0039-6
Abstract: Les publications électroniques ne sont pas accessibles sans auxiliaires techniques et nécessitent un entretien minutieux et constant ; un regard sur les supports et formats de données des 25 dernières années en témoigne. Plus récemment, le problème est l’objet de congrès et d’études. L’utilisation de formats de données standard, la neutralité des médias et des données indépendantes de plates-formes, de même que le centrage sur les données au lieu du centrage sur les processus sont les conditions d’une disponibilité à long terme. Pour les sciences humaines, les textes ne sont pas seulement source d’information, mais font eux-mêmes l’objet d’études scientifiques. C’est pourquoi leur publication dans un seul format de présentation ne suffit pas. Outre les instruments d’étude, de recherche et de navigation, il est nécessaire de disposer d’une forme de publication qui ne mette pas la présentation au premier plan, mais qui donne également accès au contenu et à la structure des documents publiés. Tant l’élaboration que l’analyse scientifique de tels documents requièrent des outils dont l’étendue excède ce que proposent les outils de publication et d’accès commerciaux. La flexibilité indispensable doit être garantie par la présence de fonctions de base dans le traitement de texte qui n’impliquent ni n’excluent aucun questionnement donné. Ceci est démontré par deux exemples d’analyse et de préparation de textes disponibles sous forme électronique.
Margus Ott
Studia Philosophica Estonica , 2011,
Abstract: K esoleva artikli eesm rgiks on v lja t tada olenditeooria m ningad p him isted. Olendit m ratletakse teatavate eristumisprotsesside l imimisena ehk "l bivaatusena". Nendel protsessidel on kaks külge, "esi-" ja "isekülg". Esikülg on k rvutuvuslik, st. paljusus, mille elemendid on üksteise k rval; isekülg on l bistuvuslik, st. paljusus, mille elemendid l bistavad üksteist. Need kaks külge ei sarnane teineteisega ja nende vahel liikumine k tkeb taandamatut ajalisust, ontogeneesi. Artiklis laiendatakse olendi m istet "vertikaalis" erinevatele keerukustasanditele (eluline, molekuliline, atomaarne jt) ja "horisontaalis" erinevatele individualiseeritusastmetele. Isekülge k sitletakse liigendatuna piki afekteerimis- ja afekteeritavusviise, mis t histavad seda, mida olend suudab tajuda ja teostada, ehk seda, milleks ta on v imeline. L puks k sitletakse esi- ja isekülge olemise kui protsessi kahe aspektina, esinemise ja isenemisena. Esinemise ja isenemise ringluste arvukus ja tempo variatiivsus m ravad olendi v ehulga. A Theory of BeingsThe paper proposes to work out concepts for describing the individualization of beings on various levels of organization. A being with a certain degree of individuality comes into being when certain processes of differenciation are being integrated together. It is conceived of as having two aspects, self-relation (isekülg) and other-relation (esikülg). The former is a multiplicity where the elements interpenetrate each other and the latter is a multiplicity where the elements are exterior to each other (juxtaposition). The articulations of interpenetrating multiplicity determine how a being can affect its surroundings and be affected by it, and the modes of this articulation can be seen as attractors of the "phase-space" of a being. Ontogenesis is on the one hand the actualization of this virtual phase-space in an actual form with its characteristic ways of spatialization and temporalization. On the other hand, ontogenesis means the revirtualization of juxtaposing elements and processes. The number and intensity of these circuits determines the degree of power of a being. The paper proposes to extend all these notions also to pre-biotic systems.
Frauengesundheit und Hashimoto-Thyreoiditis - Allgemeine, gyn kologische und geburtshilfliche Aspekte
Ott J
Speculum - Zeitschrift für Gyn?kologie und Geburtshilfe , 2012,
Group association schemes and Schur rings
Udo Ott
Le Matematiche , 1992,
Abstract: See directly the article.
Descri o de duas espécies novas de Opopaea do sul do Brasil (Oonopidae, Araneae)
Ott Ricardo
Iheringia. Série Zoologia , 2003,
Abstract: Two new species, Opopaea viamao and O. ita, are described from the states of Rio Grande do Sul and Santa Catarina, Brazil, respectively. Both species present reduction or loss of posterior median eyes, a possible synapomorphic caracter.
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