79 research outputs found
Hubert Minkenberg: Aspects of the musical life of adult amateur musicians. An empirical study [Translated with www.DeepL.com]
No full textIn der vorliegenden Untersuchung wurden etwa 1.100 Personen - überwiegend Laienmusikerinnen und Laienmusiker im Erwachsenenalter (> 18 Jahre) mittels eines Internetfragebogens zu 180 Aspekten ihres Musikerlebens befragt. Insgesamt wurden etwa 200.000 Antworten ausgewertet. Die Fragen bezogen sich auf folgende Bereiche: Soziologische Daten, vokales Musizieren und Instrumentalspiel, Musikunterricht, Übeverhalten, Musikalische Präferenzen, emotionale Bedeutung von Musik. Die Ergebnisse dieser Untersuchung lassen folgende Grundaussagen zu: a) Musikhören und Musikausübung haben eine große, nicht zu unterschätzende positive Bedeutung für die Lebensgestaltung und das Lebensgefühl von erwachsenen Menschen. Das Musikerleben nimmt im Alltagsleben und in der Alltagsgestaltung erwachsener Menschen eine wichtige Rolle ein. b) Musikausübung korreliert positiv mit anderen außermusikalischen Interessensgebieten wie Sport, Kultur, Theater und Politik. c) Musikhören und Musikausübung korreliert stark mit einem positiven und aktiven Lebensgefühl. d) Musikhören und Musikausübung führt zu einer positiven Selbstwahrnehmung und zu einer positiven Wahrnehmung der Selbstwirksamkeit.During this investigation about 1.100 persons (predominantly amateur musicians at the adult's age) were questioned by means of an internet questionnaire concerning 180 aspects of their musical experience. All in all about 200.000 answers have been evaluated. The questions referred to the following domains: Sociological data, Singing and instrumental music, Musical lessons, Rehearsing, Musical preferences, Emotional meaning of music. The results of this investigation lead to the following basic statements: a) Listening to music and musical exercise have an important positive mean ing not to be underestimated for the life creation and the attitude to life of adult people. The music experience takes an important role in the every day life and in the daily routine of adult people. b) Musical exercise correlates positively with other external-musical interest areas like sport, culture, theatre and policy. c) Listening to music and musical exercise strongly correlates with a positive and active attitude to life. d) Listening to music and musical exercise leads to a positive self perception and to a positive perception of the self effectiveness.https://www.pubpsych.de/get.php?id=0199955peerReviewedpublishedVersio
De allerbeste gebeden, dewelke S. H. Pius den VI, paus van Romen, verklaerd en uytgelegd heeft, en [...] in geheel den kerkelyken staet, tot nuttig gebruyck der H. Misse en der heylige sacramenten, zyn uytgedeeld en vereerd geworden.
No full textVingerafdruk: 000012 - b1 A2 : b2 H ebHerkomst: Ex bibliotheca J.F.J. Heremans ; C. J. Moon
Dynamic covalent surfactants
No full textIn this thesis the development of surfactant aggregates with fast exchange dynamics between the aggregated and non-aggregated state is described. Dynamic surfactant exchange plays an important role in natural systems, for instance in cell signaling, cell division, and uptake and release of cargo. Remarkably, dynamic surfactant exchange in synthetic systems has received relatively little attention. In this thesis we have shown that surfactants and surfactant aggregates with diverse morphologies with fast exchange dynamics could be obtained by making use of dynamic covalent surfactants. These dynamic covalent surfactants were formed in water by mixing of two isotropic solutions of a surfactant precursor. As surfactant precursors we used hydrophilic aldehyde functionalized building blocks and hydrophobic, but water soluble, amine building blocks. By mixing both building blocks in water, surfactants were formed in situ by the formation of reversible imine bonds between the two precursor building blocks. These surfactants form surfactant aggregates above their critical aggregation concentration (CAC). By following this approach, we have shown that spherical micelle formation can be switched on and off by reversible displacement of the equilibrium between the nonamphiphilic building blocks and their single tailed surfactant counterparts. Also double tailed surfactants could be obtained by this approach, from aqueous solutions of a bisaldehyde functionalized head group and an amine functionalized apolar tail through the in-situ formation of dynamic covalent imine bond between the precursors. The reversible nature of the dynamic covalent imine bond made the bilayer of the resulting vesicle assemblies highly dynamic, which is quite unusual for vesicles composed of double tailed surfactants. Due to the fast formation and dissociation kinetics of the imine bond, these dynamic covalent vesicles are highly responsive to changes in their environment, resulting for instance in complete dissociation upon dilution or changes in pH. Since dynamic covalent surfactants are capable of reversible formation due to the presence of reversible dynamic covalent bonds in the molecular structure, it was assumed that surfactant mixtures would be able to change composition in response to a change in their environment, on account of their continuous building block exchange. To test this hypothesis, we chose a micelle forming dynamic covalent surfactant system and a vesicle forming dynamic covalent surfactant system as a starting point. Next, we combined these systems, in such a way that there is building block competition between a micelle forming hydrophobic tail and a vesicle forming hydrophobic tail for binding with a hydrophilic head group or for a micelle forming head group and a vesicle forming head group for a single hydrophobic tail . Here, we show that vesicle forming surfactants and vesicles self-select from a mixture of aldehyde and amine functionalized non-surface active surfactant precursors, which are capable of forming multiple aggregate types and surfactants. We were able to describe the experimental data with a thermodynamic model, which strongly suggests that the selection of bilayer-forming surfactants and bilayer morphologies is thermodynamically controlled. We believe that these results bear some significance for the mechanisms behind the formation of bilayer compartments in prebiotic systems. We have shown that also dynamic covalent wormlike micellar morphologies can be obtained by imine bond formation upon mixing of simple water soluble gemini-surfactant precursors. Analogous to the previously obtained micelles and vesicles, these dynamic covalent wormlike micelles could be associated and dissociated upon changing the pH or temperature, using the fast association and dissociation of the imine bond. Also, exchange of the mono-functional amine tail for a diamine derivative in the vesicle-forming system led to the formation of crosslinked networks of dynamic vesicles, gelling the surrounding solvent. These vesicle gels are highly responsive to changes in their environment, but also partly self-heal after removal of any perturbation. The work in this thesis provides a new approach for the development of responsive surfactant assemblies that are easily formed by simple mixing of isotropic aqueous precursor solutions. The resulting surfactant assemblies show fast dissociation kinetics and switchable surfactant morphologies. In the future, this work might find application in the development of dynamic encapsulation and release materials.DelftChemTechApplied Science
Integrating unicast and multicast traffic scheduling in a combined input- and output-queued packet-switching system
No full text
David oder Salomon? : Studien zur Rezeptionsgeschichte Kaiser Ludwigs des Frommen in der Historiographie des 9. bis 13. Jahrhunderts
No full textThe thesis refers to the history of reception of emperor Louis the Pious in historiographic literature from Carolingian times up to the 13th century. Louis’ contemporaries – like Thegan, Astronomus, Nithard and Ermoldus Nigellus – understand his reign as presence, which they try to influence. Political support or opposition is expressed by the omission or misrepresentation of facts. During the following generations, the reign of Louis the Pious is taken as a recent and still influential past and it is set in different relations to present reality. Here two characteristic approaches can be distinguished: the image of Louis’ reign as a "golden age" in the interpretation of Ado of Vienne or its negative appraisal as a "root of all evil" by Regino of Prüm. The third phase of reception then illustrates a radical break, due to the disintegration of the Carolingian Empire. Just in few regional references a reception of Louis the Pious can be traced. The subsequent fourth phase of reception which starts in the 11th century again offers a broader variety of approaches. Analysis has to focus separately on the Empire and France. Parallel to the renaissance of literary type of World Chronicles the historic figure of Louis the Pious is directly employed within larger schemes in which Louis the Pious as individual person is covered by the figure of the Emperor. Abbreviations and concentration on few elements produce a schematization. Most significant changes and divergence can be observed in texts which polarize between pope and emperor which are abstractly seen as antagonist institutions. The reign of Louis the Pious becomes a historical exemplum. This tendency is even enhanced in the historiography of Staufer-epoch. The focus on these two poles of power brings about the creation of the type of Pope-Emperor-Chronicles. The most popular author of this category is Martin of Troppau. Without any historical concern the reign of Louis the Pious is used as material to be fitted into this dualistic scheme. In France a similar development can be observed, though the reception of emperor Louis is accompanied by more national implications. This is the case in the texts of Helinand of Froidmont and other authors. The Grandes Chroniques de France present the final stage of a specific French development. They are the origin of an absolutely new quality of reception: Louis the Pious is shown as the ideal emperor and king of France. This fifth phase of reception is specific for France and cannot be traced in the Empire. In Western reception Louis the Pious steps out of the shadow of Charlemagne, in the East he is not even seen in this respect
Benefits of document maps for text access in knowledge management: A comparative study
No full textS.621-62
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