757 research outputs found
Integrierte Bewertung am Beispiel von Lärmschutzmaßnahmen im Schienengüterverkehr
No full textOptimierungen im Schienenverkehr haben den Charakter, immer nur im Zusammenspiel von
Fahrzeug, Infrastruktur und Betrieb stattzufinden. Dabei ist es oft so, dass ein Optimum für einen
Beteiligten nicht auch dem Gesamtoptimum über allen Beteiligten entspricht. Um eine integrierte
Bewertung von unterschiedlichen Faktoren von quantifizierbaren technologischen bis hin zu
Stakeholder-Perspektiven zu erreichen, sind eine besondere Methodik und der Einsatz eines
angepassten Software-Werkzeugkastens erforderlich. Dies soll im Folgenden am Beispiel von
Maßnahmen zum Lärmschutz im Schienengüterverkehr erläutert werden
Plant carbon allocation in a changing world – challenges and progress: introduction to a Virtual Issue on carbon allocation
No full textGrösser Denken - Die Technologieprognose System Bahn 2050
No full textS.6-8Digitalisierung, Vernetzung und Künstliche Intelligenz sind die Trends in der Bahnbranche. Zu Recht. Denn die Datenschätze, die im gesamten Bahnsystem gehoben werden, sind enorm. Täglich setzen Millionen Nutzer auf die Verkehrsmittel sowie darum angesiedelte Services des schienengebun- denen Verkehrs.Nr.
The interface shear anchorage of the U-Bahn weight-saving floor system
No full textThe U-Bahn floor system is an innovative weight-saving floor system that consists of a prefabricated floor and a structural screed. To connect these two layers, only lattice girders are applied. This means that all stresses in the complete floor system must be taken up by these lattice girders. The U-Bahn floor system is built without propping, a feature that speeds up the building process enormously. Therefore, all building phase depend on each other and together determine the capacity in the use phase. However, to correctly determine the capacity in the use phase, all stresses need to be determined per building phase. The capacity of the correctly anchored lattice girders must after all withstand these stresses. The aim of this research is to find out whether the lattice girders can resist the shear stresses of the U-Bahn floor system. The following research question has been drawn up: In which way does the design of the interface shear of the U-Bahn weight-saving floor system sufficiently anchorage the structural screed? To answer this question, extensive research was first conducted into the various building phases of the U-Bahn floor system. The stresses and forces for each phase individually were calculated. Subsequently, it is examined which type of lattice girder is usable in the U-Bahn floor system and how this type is incorporated in the floor. The stresses that these lattice girders must resist and transfer, have been calculated by means of two methods, an analytical calculation and finite element analysis calculation. As there is no product standard for the U-Bahn floor system yet, the calculations are based on the Eurocode and the floor plank standard. The results of the analytical calculation regarding the anchoring of the lattice girder showed the following : (i) the connection reinforcement, according to the floor plank standard, is sufficient, (ii) the shear force, according to the Eurocode, is not sufficient and, (iii) the detail requirements, as described in the Eurocode, have not been met. The results of the analytical calculation regarding the interface shear capacity of the total floor system shows that the resistance of the lattice girder in the U-Bahn floor system is lower than the acting stresses in the use phase, which results in a unity check of 1.40, which exceeds the maximum unity check of 1.0 as given in the Eurocode. To verify the analytical calculation and to determine to what extent the anchoring of the lattice is insufficient, the floor has been modelled in the finite element program, Diana. Due to the complexity of the program and the calculation, it has been decided to use a linear analysis for the calculation of the different phases of the U-Bahn floor system. Due to this, no result of the crack width and redistribution of the forces in the floor can be given. Nevertheless, the results do show that the concrete cannot take up the calculated stresses, which suggests that the floor will crack. Future research can further investigate the limits of the U-Bahn floor system by means of a non-linear calculation in a finite element analysis. In this non-linear calculation, the factors, deflections, creep and shrinkage must also be included, since this research has shown that these are co-determining factors for the interface shear capacity of the floor. These results will then have to be verified with destructive tests. Finally, if the results are confirmed, they can be converted into a rule-of-thumb, in order to facilitate tenders in the future.Civil Engineering | Structural Engineerin
Bereitet die Wege, bereitet die Bahn BWV 132
No full textJohann Sebastian Bach Kantate Bereitet die Wege, bereitet die Bahn BWV 132; Universitäts- und Studentenchor der FSU Jena Akademische Orchestervereinigung Jena Dirigent: Sebastian Krahnert Sopran: Marietta Zumbült Alt: Dorothea Zimmermann Tenor: Damien Schmedje Bass: Alexander Drescher Aufname vom 19.12.2015 Harald Ziegler und Christoph Kiefer; Abmischung: Christoph Kiefer Stadtkirche St. Michael zu Jen
Late Increase of Serum S100 β Protein Levels in Hamsters after Oral or Intraperitoneal Infection with Scrapie
No full textFollowing recent reports of elevated serum S100 β protein (S100 β) levels in patients with genetic and sporadic Creutzfeldt-Jakob disease and in rodents parenterally infected with scrapie, the suitability of serum S100 β as a preclinical marker for transmissible spongiform encephalopathies was assessed in time-course studies. Syrian hamsters were orally and intra-peritoneally challenged with scrapie and assayed for serum S100 β levels at various times after infection. Although elevated serum S100 β levels were consistently observed in terminally ill animals for both routes of infection, the experiments failed to detect significantly increased S100 β serum concentrations prior to the manifestation of clinical symptoms. Thus, in this animal model, serum S100 β does not appear to be an appropriate marker for the preclinical detection of scrapie, but it may provide a convenient laboratory aid for the diagnosis of transmissible spongiform encephalopathy in naturally or accidentally infected animals and humans
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Lullaby
No full textPerformance at the B. Iden Payne Theatre, UT-Austin. Streams (interactive character by Tomie Hahn/Curtis Bahn): There is a dream state where memories become intertwined with the sensuality of the present. In recollecting streams, memories of places, bodies of water and land, technology, the flow of information, transmission, and liquid states arise. These memories, drawn from the body, awaken as gesture and sound. Through technology, this piece toys with the ephemeral quality of sound and the physical memory of time, sonic space, and sensory experience. Pikapika (interactive character by Tomie Hahn/Curtis Bahn): Meet Pikapika, a character influenced by anime and manga, Japanese pop animation and comics. Pikapika embodies movements from bunraku (puppet theater), a movement vocabulary Tomie Hahn studied while learning nohn buyo (Japanese traditional dance) pieces derived from the puppet theater. The concept of the sonic punctuation of Pikapika's movements is drawn directly from the bunraku musical tradition. However, the actual sounds are not drawn from bunraku musical vocabulary. Pikapika dons a new wireless interactive dance system (SSpeaPer, Sensor-Speaker-Performer) created by Curtis Bahn. SSpeaPer naturally locates and spatializes the electronic sounds to emanate from the speakers mounted on her body. As Pikapika moves, her gestural information is sent by radio to an interactive computer music system. The sounds are then broadcast back to her body, creating a new sort of audio "alias" for her character; a sonic mask. Choreography: Laura Cannon (Transmigration of Angels); Theresa Hardy (...the scenery was Parting); Yacov Sharir (Tassos, Lullaby); Pika-Pika (Tomie Hahn). Dance Company: Sharir+Bustamante Danceworks, with guest artists Curtis Bahn and Tomie Hahn and Spurse. Dancers: Laura Cannon (Transmigration of Angels); Kevin Briggs, Laura Cannon, Alby Roblejo, Andee Scott (...the scenery was Parting); Kevin Briggs, Laura Cannon, Theresa Hardy, Alby Roblejo, Andee Scott (Tassos); Andee Scott, Yacov Sharir (Lullaby) Lighting: Amarante Lucero. Costumes: Amy Burrell; Amy Burrell with Laura Cannon (Transmigration of Angels). Images: Laura Cannon (Transmigration of Angels). Composer: Larisa Montanaro (Transmigration of Angels, Lullaby); Michael Nymen with voice by Christopher Middleton (...the scenery was Parting); Graham Reynolds (Tassos). Vocalist: Larisa Montanaro (Lullaby). Text: Excerpts from "The Fourth Elegy" by Rainer Maria Rilke (...the scenery was Parting). Composition/Interface Design: Curtis Bahn (Pika-Pika).Performance at the B. Iden Payne Theatre, UT-Austin.Theatre and Danc
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Respiration from roots and the associated microorganisms
No full textThe largest flux in the global carbon cycle is the uptake of CO2 by plants as photosynthesis. Estimates of gross primary production (GPP), or total amount of CO2 assimilated by terrestrial plants, range between about 109 and 120 Pg C per year at the global scale (Schlesinger, 1997; Zhao et al., 2005). Except for carbon that remains stored in passive organic matter pools, as fossil fuel, and an estimated 0.2 Pg C per year sedimenting on the ocean floors, assimilated carbon is eventually returned to the atmosphere by respiration, either by plants or by heterotrophic organism. The time between the fixation of a carbon atom by the plant and its conversion back to CO2 is extremely variable, ranging between a few hours and thousands of years. How long it remains part of organic compounds will depend on its turnover within the plant and, eventually as part of soil organic matter
Insolvenzrisiko eines staatlichen Verkehrsunternehmens am Beispiel der Deutschen Bahn
No full textDas Buch befasst sich vor dem Hintergrund der Diskussion um die Kapitalprivatisierung der Deutschen Bahn AG mit der Frage, ob die Möglichkeit der Insolvenz des Unternehmens Deutsche Bahn AG oder seiner Töchterunternehmen faktisch und rechtlich eröffnet ist.
Erläutert werden zunächst verschiedene Privatisierungsformen sowie der Gang der Bahnreform inklusive der Privatisierungsvarianten, die in den Jahren 2006 und 2007 in Deutschland diskutiert wurden.
Anschließend wird die Möglichkeit einer Bahn-Insolvenz in der gegenwärtigen Organisationsphase (vor Kapitalprivatisierung) und parallel dazu für einige Spielarten der Kapitalprivatisierung, untersucht.
Dazu wird zunächst ein allgemeiner Überblick über das Konzernrecht und die Konzernbilanzierung gegeben. Ferner wird dargestellt inwieweit auch die DB AG und ihre Gesellschaften unter den Konzernbegriff fallen bzw. ob ein Bundeskonzern vorliegt.
Nach Feststellung der Anwendbarkeit von Insolvenzrecht im Konzern wird ein fiktives Prüfungsschema angelegt, mit dem die Zulässigkeitsvoraussetzungen für die Eröffnung eines Insolvenzverfahrens über das Vermögen der DB AG geprüft und schließlich bejaht werden.
Im Rahmen der Insolvenzfähigkeit wird eine eingehende Untersuchung von § 12 InsO vorgenommen, die zu dem Schluss führt, dass sich eine Insolvenzunfähigkeit der DB AG de lege lata nicht ableiten lässt.
Das Vorliegen eines Insolvenzgrundes erscheint trotz Art. 87e GG möglich, da sich diesem keine Verpflichtung des Bundes zur sofortigen Abwendung jeglichen Insolvenzgrundes entnehmen lässt.
Um das praktisch wenig sinnvolle Ergebnis, dass die Eröffnung eines Insolvenzverfahrens über das Vermögen der DB AG durchaus in Betracht kommt, zu verhindern, wird vorgeschlagen eine klarstellende Regelung in § 12 InsO aufzunehmen, aus der sich eine Insolvenzunfähigkeit der DB AG ergibt
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