508 research outputs found
Mikrowellen-Simulationen am IGVP -- Für Technologie und Fusionsforschung
No full textDie kontrollierte Kernfusion auf der Erde wird mit 100 Millionen Grad Celsius heißen Wasserstoffplasmen erforscht, die durch magnetische Felder eingeschlossen werden. Dabei führt Plasmaturbulenz zu einer Verschlechterung des Einschlusses. Diese Präsentation veranschaulicht Simulationen zur Messung der turbulenten Dichtefluktuationen mittels Dopplerreflektometrie.
Die Präsentation lief anlässlich des Tags der Wissenschaft der Uni Stuttgart am 25.6.2022.
Referenz: Lechte C, Conway G D, Görler T, Tröster C and the ASDEX Upgrade Team 2017 Plasma Phys. Contr. Fusion 59 07500
Effect of Different Working Settings of Sandblasting on Resin Composite Repair Bond Strength
No full textTo investigate the effect of different sandblasting settings on the shear bond strength (SBS) in the repair of resin composite, specimens (resin composite, enamel, and dentin; each group n = 16) were sandblasted by varying the parameters of air pressure (0.2/0.3/0.4 MPa), angle (45/90°), particle size (27/50 μm), tip size (0.8/1.2 mm), and distance (2/5/10 mm) prior to the application of a universal adhesive (Adhese Universal) and resin composite (adhesive area: 7.07 mm2). The specimens were subjected to artificial aging (10,000 cycles, 5–55 °C) prior to (resin composite only) and after repair. Groups without mechanical pretreatment and resin composite incremental bond strength served as controls. Statistical analysis was performed using ANOVAs, post hoc tests, and Chi2-tests (p < 0.05). Only air pressure and distance impacted SBS (p ≤ 0.049). However, resin composite SBS did not differ from the resin composite incremental SBS within all sandblasting settings (positive control: 21.0 ± 5.0 MPa, p ≥ 0.566). While sandblasting did not impact bond strength on enamel (control: 20.5 ± 5.1 MPa, p ≥ 0.999), most settings resulted in a lower bond strength on dentin (control: 20.1 ± 4.7 MPa, p ≤ 0.027). In conclusion, sandblasting significantly improves resin composite repair bond strength, while application parameters are of minor relevance
Towards an Understanding of Hydrogen Supply Chains: A Structured Literature Review Regarding Sustainability Evaluation
No full textHydrogen technologies have received increased attention in research and development to foster the shift towards carbon-neutral energy systems. Depending on the specific production techniques, transportation concepts, and application areas, hydrogen supply chains (HSCs) can be anything from part of the energy transition problem to part of the solution: Even more than battery-driven electric mobility, hydrogen is a polyvalent technology and can be used in very different contexts with specific positive or negative sustainability impacts. Thus, a detailed sustainability evaluation is crucial for decision making in the context of hydrogen technology and its diverse application fields. This article provides a comprehensive, structured literature review in the context of HSCs along the triple bottom line dimensions of environmental, economic, and social sustainability, analyzing a total of 288 research papers. As a result, we identify research gaps mostly regarding social sustainability and the supply chain stages of hydrogen distribution and usage. We suggest further research to concentrate on these gaps, thus strengthening our understanding of comprehensive sustainability evaluations for HSCs, especially in social sustainability evaluation. In addition, we provide an additional approach for discussion by adding literature review results from neighboring fields, highlighting the joint challenges and insights regarding sustainability evaluation
Barthes, Bakhtin, Structuralism: A Reassessment
No full textPhDThe thesis is a comparative analysis of the shared ideas and concerns in the works of
Mikhail Bakhtin and Roland Barthes from the point of view of differences between
French and Slavic literary structuralisms. Its background argument is that the
structuralism developed in the later works of the Russian Formalists and by Prague
Structuralists and Soviet Semioticians is more historically and socially oriented than its
French version, defining the structure of a literary work as a system of all of its
elements and effects (even those that take us outside of the text, like literary tradition
and historical and political circumstances). In this sense, Bakhtin can be seen as a part
of the Slavic structuralist tradition (and not opposed to it as is often claimed), and
Barthes (seen throughout his career) is on the whole perhaps closer to the Slavic
structuralism than he is to the French.
The particular problems discussed are those of the relationship between
literature and ideology, the notions of intertextuality, heteroglossia, dialogism and
polyphony and the differences between them, and the role of the author.
Barthes and Bakhtin shared a lifelong interest in the role of ideology in literature
and the influence of authoritarian language or myth on culture in general and the literary
text in particular. They looked for ways in which the deadening effect of the
mythological (epic, monological) thought and word can be counteracted through
literature, and different versions of what Kristeva termed 'intertextuality' played an
important part in their treatment of the subject. They also both discussed the role of the
author and their voice in the literary text, and the question of their power over the text,
its characters (Bakhtin) and the reader (Barthes).
The main thread of Barthes and Bakhtin's thought focuses on the problem of
counteracting authoritarian language through literature, and the solutions they proposed
can fruitfully be seen in the light of Slavic structuralism's notions of literary structure
An introduction to the structural study of the writing of Australian history : some political implications
No full textThis thesis was scanned from the print manuscript for digital preservation and is copyright the author.
Researchers can access this thesis by asking their local university, institution or public library to
make a request on their behalf. Monash staff and postgraduate students can use the link in the References field
FICTION and POLYPHONY
No full textBefore I come to explain what some of the consequences of fiction as polyphony are, let me say, by way of introduction, that our problem in a nutshell involves the symbolic and what we understand by this term. In particular, things in this regard could be said to turn around what is still, to my mind, a perennial problem in literary criticism, namely, an author's relationship to what he/she writes. Perhaps it is hardly necessary to repeat that, here, it is a question of life and death: the 'Death of the author' whose absence takes on a kind of 'presence' (= life) in the text - a 'resurrection accomplished in signs' , as Julia Kristeva has called it. (Kristeva, 1981;181) In a sense, therefore, those who used to maintain (and often still do- if only by implication) that a dash of psychology was sufficient to provide literary interpretation with illumination, may in fact have given us a clue as to how the literary critic might get onto the right track in this matter. For psychology, as our epigraph has it, 'is a knife that cuts both ways' (Dostoevsky, 1976;690); it oscillates between the notion of truth as referential and fiction (we will return to this point)
”Wie schrieuwe Seeltersk” – a study of the orthography of Saterland Frisian literary texts
No full textThe purpose of this paper is to investigate whether literary texts in Saterland Frisian correspond to the written form codified in dictionaries. In order to answer this question, two dictionaries have been investigated: one by Pyt Kramer, and one by Marron C. Fort. Both Kramer and Fort have proposed their own orthographic systems, and made efforts to establish them not only in their respective dictionaries, but in other written works as well. Two literary texts, written by speakers of Saterland Frisian, have been compared to the dictionaries in terms of orthography: one by Gesina Lechte-Siemer, and one by Gretchen Grosser. The results of the investigation show that Lechte-Siemer’s orthography mostly corresponds to that of Kramer. However, Grosser’s text – which is the more recent of the two – does not adhere strictly to either orthographic system, instead combining aspects of both. This indicates that neither Kramer’s nor Fort’s orthography has established itself as standard, and that a degree of flexibility remains when using Saterland Frisian in writing
"Wie schrieuwe Seeltersk" : A study of the orthography of Saterland Frisian literary texts
No full textThe purpose of this paper is to investigate whether literary texts in Saterland Frisian correspond to the written form codified in dictionaries. In order to answer this question, two dictionaries have been investigated: one by Pyt Kramer, and one by Marron C. Fort. Both Kramer and Fort have proposed their own orthographic systems, and made efforts to establish them not only in their respective dictionaries, but in other written works as well. Two literary texts, written by speakers of Saterland Frisian, have been compared to the dictionaries in terms of orthography: one by Gesina Lechte-Siemer, and one by Gretchen Grosser. The results of the investigation show that Lechte-Siemer’s orthography mostly corresponds to that of Kramer. However, Grosser’s text – which is the more recent of the two – does not adhere strictly to either orthographic system, instead combining aspects of both. This indicates that neither Kramer’s nor Fort’s orthography has established itself as standard, and that a degree of flexibility remains when using Saterland Frisian in writing.</p
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