1,180,765 Works

Multi-Channel Seismic Shot Data from the Emperor Seamounts chain acquired during Langseth cruise MGL1902 (2019)

Donna Shillington, Anthony Watts, Robert Dunn, Paul Wessel & Garrett Ito
This data set was acquired with the LDEO Multi-Channel Seismic system during the 2019 R/V Marcus G. Langseth cruise MGL1902 (Co-Chief Scientists: Donna Shillington, Anthony Watts, Robert Dunn). The data files are in SEGD format and contain Multi-Channel Seismic Reflection shot data that has not been processed. The data set was acquired as part of the project called Collaborative Research: Seismic imaging of volcano construction, underplating and flexure along the Hawaii-Emperor Seamount Chain. Funding was...

Raw Seismic Navigation Data (P2 format) from the Emperor Seamounts chain acquired during Langseth cruise MGL1902 (2019)

Donna Shillington, Anthony Watts, Robert Dunn, Paul Wessel & Garrett Ito
This data set was acquired with the LDEO Multi-Channel Seismic system during the 2019 R/V Marcus G. Langseth cruise MGL1902 (Co-Chief Scientists: Donna Shillington, Anthony Watts, Robert Dunn). The data files are in U.K.O.O.A. P2/94 format and contain Seismic Navigation data that has not been processed. The data set was acquired as part of the project called Collaborative Research: Seismic imaging of volcano construction, underplating and flexure along the Hawaii-Emperor Seamount Chain. Funding was provided...

Processed Seismic Navigation Data (P1 format) from the Emperor Seamounts chain acquired during Langseth cruise MGL1902 (2019)

Donna Shillington, Anthony Watts, Robert Dunn, Paul Wessel & Garrett Ito
This data set was acquired with the LDEO Multi-Channel Seismic system during the 2019 R/V Marcus G. Langseth cruise MGL1902 (Co-Chief Scientists: Donna Shillington, Anthony Watts, Robert Dunn). The data files are in U.K.O.O.A. P1/90 format and contain Seismic Navigation data that was processed after acquisition. The data set was acquired as part of the project called Collaborative Research: Seismic imaging of volcano construction, underplating and flexure along the Hawaii-Emperor Seamount Chain. Funding was provided...

Raw Seismic Navigation Data (P1 format) from the Emperor Seamounts chain acquired during Langseth cruise MGL1902 (2019)

Donna Shillington, Anthony Watts, Robert Dunn, Paul Wessel & Garrett Ito
This data set was acquired with the LDEO Multi-Channel Seismic system during the 2019 R/V Marcus G. Langseth cruise MGL1902 (Co-Chief Scientists: Donna Shillington, Anthony Watts, Robert Dunn). The data files are in U.K.O.O.A. P1/90 format and contain Seismic Navigation data that has not been processed. The data set was acquired as part of the project called Collaborative Research: Seismic imaging of volcano construction, underplating and flexure along the Hawaii-Emperor Seamount Chain. Funding was provided...

Monitoring recreation across European nature areas: A geo-database of visitor counts, a review of literature and a call for a visitor counting reporting standard

Jan Philipp Schägner, Joachim Maes, Luke Brandner, Maria Luisa Paracchini, Volkmar Hartje & Gregoire Dubois
Nature recreation and tourism is a substantial ecosystem service of Europe’s countryside that has a substantial economic value and contributes considerably to income and employment of local communities. Highlighting the recreational value and economic contribution of nature areas can be used as a strong argument for the funding of protected and recreational areas. The total number of recreational visits of a nature area has been recognised as a major determinant of its economic recreational value...

GIS-Based Mapping of Ecosystem Services: The Case of Coral Reefs

Luke Brandner, Florian Eppink, Jan Philipp Schägner, Pieter Van Beukering & Alfred Wagtendonk
This chapter illustrates the process of mapping ecosystem service values with an application to coral reef recreational values in Southeast Asia. The case study provides an estimate of the value of reef-related recreation foregone, due to the decline in coral reef area in Southeast Asia, under a baseline scenario for the period 2000 – 2050. This value is estimated by combining a visitor model, meta-analytic value function and spatial data on individual coral reef ecosystems...

Mapping ecosystem services' values: Current practice and future prospects

Jan Philipp Schägner, Luke Brandner, Joachim Maes & Volkmar Hartje
Mapping of ecosystem services' (ESS) values means valuing ESS in monetary terms across a relatively large geographical area and assessing how values vary across space. Thereby, mapping of ESS values reveals additional information as compared to traditional site-specific ESS valuation, which is beneficial for designing land use policies for maintaining ESS supply. Since the well-known article by Costanza et al. (1997), who mapped global ESS values, the number of publications mapping ESS values has grown...

Synchronization and learning in networks of chemical oscillators

Enrico Fengler
In this thesis, the collective behavior of chemical oscillators in adaptive networks with time-dependent coupling weights is studied theoretically and experimentally. About 100-150 micro meter in size catalytic beads based on the Belousov-Zhabotinsky (BZ) oscillatory chemical reaction are fixed in an array of conical slots covered by a gel layer, and are placed into contact with BZ solution in an open reactor to maintain stationary non-equilibrium conditions. Using the light-sensitive redox catalyst Ru(dmbpy)32+, the individual...

Newton's method and the computational complexity of the fundamental theorem of algebra

Prashant Batra
Several different uses of Newton's method in connection with the Fundamental Theorem of Algebra are pointed out. Theoretical subdivision schemes have been combined with the numerical Newton iteration to yield fast root-approximation methods together with a constructive proof of the fundamental theorem of algebra. The existence of the inverse near a simple zero may be used globally to convert topological methods like path-following via Newton's method to numerical schemes with probabilistic convergence. Finally, fast factoring...

Analoge Orte im digitalen Zeitalter

Petra Klug
Mit der Digitalisierung ändert sich Vieles: Wie wir lernen und arbeiten, kommunizieren und unser Alltagsleben organisieren. Für viele Menschen sind damit Chancen verbunden, andere sehen vor allem Risiken. Ob unsere Gesellschaft die Digitalisierung sinnvoll nutzen kann und wird, hängt von ganz unterschiedlichen Faktoren ab. Neben dem Zugang zu digitalen Angeboten und Services sind digitale Kompetenzen ein entscheidendes Erfolgskriterium. Neue digitale Informations- und Kommunikationsformate haben die Arbeit und Angebote in der Bibliothek bereits stark verändert und...

CHRvis: an animation extension for animating constraint handling rules

Nada Sharaf
The work in the thesis presents an animation extension (CHRvis) to Constraint Handling Rules (CHR). Visualizations have always helped programmers understand data and debug programs. A picture is worth a thousand words. It can help identify where a problem is or show how something works. It can even illustrate a relation that was not clear otherwise. CHRvis aims at embedding animation and visualization features into CHR programs. It thus enables users, while executing programs, to...

Vergleich der RDA- und REA-Werte von humanen und bovinen Zahnhartsubstanzproben mit verschiedenen Kunststoffproben

Nazanin Sadeghi-Haghighi
In der vorliegenden Arbeit wurden Einflussfaktoren auf den RDA- und REA-Wert untersucht. Da diese Werte trotz standardisiertem Prozess in verschiedenen Laboratorien nicht reproduzierbar ermittelt werden können, wurde in dieser Studie humanes und bovines Zahnmaterial auf Varianz der Abrasion geprüft. Von 15 Patienten und 15 Rindern wurden jeweils zwei Proben genommen, in Kunststoffblöcken eingebettet und mit Hilfe einer Läppingmaschine angeschliffen. Anschließend wurde die Oberfläche mittels Profilometrie aufgenommen. In einer Bürstmaschine wurden die Proben mit einer Frequenz...

Molecular imprinting of proteases via miniemulsion polymerization

Denise Riedel
Molecularly imprinted polymers (MIPs) are synthetic binding materials and a wide range of syntheses methods have been reported in literature. The aim of this thesis was the synthesis and characterization of selective binding material for binding thermolysin (TL) as example protease and matrix metallopeptidase 9 (MMP9) in cell culture media via molecular imprinting. In the pre-polymerization complex, self- assembly between template molecule (TM) and functional monomer (FM) occurs, before the synthesis of the polymer takes...

Untersuchungen zum Auftreten kritischer Sauerstoffkonzentrationen in Fahrzeugen des Rettungsdienstes bei Anwendung verschiedener Applikations- und Beatmungsformen

Miriam Langlouis
Der Einsatz von Sauerstoff gehört in der medizinischen Versorgung zu den Standardmaßnahmen, so auch in der präklinischen Versorgung im Rettungsdienst. Wird über einen längeren Zeitraum mit hohen Konzentrationen von Sauerstoff gearbeitet, so kann man davon ausgehen, dass es in einem geschlossenen Raum wie einem Kranken- oder Rettungswagen zu Veränderungen der Sauerstoffkonzentration kommt. Gefahr besteht, wenn die Konzentration von Sauerstoff in der Umgebungsluft über 23% beträgt. Je höher die Konzentration, desto schneller kommt es nach Funkenbildung...

Two phase Monte Carlo modeling of gas and water transport in PEM fuel cells

Anahid Pournemat
Low temperature polymer electrolyte membrane fuel cells are known as clean energy converters, which produce electrical energy as the result of the cell electrochemical reaction between hydrogen and oxygen, where water and heat are the only byproducts. Although an adequate hydration is required for the ionic conductivity of the polymer membrane of the cell, the excess water in liquid phase can obstruct the paths of the reactant gases, which diffuse from the gas flow channels...

Magnetisch basierte Systeme zur Manipulation und Detektion von magnetischen Partikeln

Benjamin Riedmüller
Magnetische Nanopartikel (MNP) spielen eine wichtige Rolle im Bereich der Lebenswissenschaften und werden dort in zahlreichen Anwendungen eingesetzt. Neben der Möglichkeit, MNP zur Kontrastverstärkung in der NMR-Diagnostik einzusetzen, finden NMP ebenfalls Anwendung im Bereich der Hyperthermie zur lokalen Behandlung von tumorhaftem Gewebe. Zusätzlich zu in-vivo Applikationen sind in den letzten Jahren vermehrt in-vitro basierte Anwendungen basierend auf magnetischen Partikeln entwickelt worden. Hierbei können MNP zur Aufkonzentration von Bioanalyten wie Proteinen oder Nukleinsäuren (DNA) eingesetzt werden....

The role of complement component C6 and the MAC-regulator CD59a in skeletal homeostasis

Zhaozhou Ren
The terminal complement complex (TCC) is the final stage of complement activation and has been shown to contribute to the pathogenesis of skeletal disorders in inflammatory conditions, such as rheumatoid arthritis and osteoarthritis. However, the effect of the TCC on bone homeostasis is investigated to a lesser extent. Therefore, the phenotypes of trabecular and cortical bone were analyzed in C6-deficient mice, which lack the essential component of TCC, and in CD59a-knockout mice, which lack the...

Der Gebietsname Genewara an der Elbe beim Grenzhandelsplatz Magdeburg zu Beginn des 9. Jahrhunderts, sein möglicher Zusammenhang mit den Jena-Namen und die Burg contra magadaburg

Hans Schmigalla
Der Name Genewara bezeichnet in den Chroniken zweier südfranzösischer Klöster in einem Bericht (zum Jahr 805) ein Gebiet, welches sich bei Magdeburg befindet und zeitgleich mit einem Feldzug gegen die Böhmen verwüstet wurde. Der Gebietsname Genewara ist bislang nicht befriedigend gedeutet. Bereits ein Jahr später fand wiederum ein Feldzug, diesmal gegen die Sorben, statt, an dessen Ende die Entscheidung getroffen wurde, zwei Burgen zu erbauen, eine davon contra magadaburg. Für die Identifizierung dieser Burg liegen...

Öffentliche Bibliotheken als Partner bei der „Digitalen Bildung“ von Kindern und Familien

Kirsten Schlebbe
Ob die gemeinsame Gute-Nacht-Geschichte auf dem E-Book-Reader, das YouTube-Video auf einer langen Zugfahrt oder das regelmäßige Skype- Gespräch mit den Großeltern: Digitale Medien sind aus dem Alltag von Kindern und ihren Familien oftmals nicht mehr wegzudenken. Die digitale Medienumgebung wirkt sich dabei auch auf das kindliche und familiäre Informationsverhalten aus. Während früher ein passender Eintrag im Kinderlexikon gefunden werden musste, genügt heute eine kurze Suche bei Wikipedia, um den Kleinen zu zeigen, wie eigentlich ein...

Palladium-Platinum nanoparticles: well-structured bimetallic catalysts for fuel cells

Simon Tymen
The high price of platinum currently employed as catalyst for the oxygen reduction reaction in fuel cells represents an obstacle for a widespread usage of these cells. The development of bimetallic particles, reducing the quantity of platinum is a promising solution to increase the viability of the cells and to reduce their price. In this doctoral thesis, palladium was used as a second metal to synthesize bimetallic particles with easy methods. The role of bromide...

Modulation of FoxO signalling by glutathione

Dimitrios Tsitsipatis
The highly conserved transcription factors of the Forkhead box O (FoxO) family are involved in the regulation of several cellular and physiological processes, including cell proliferation, apoptosis, oxidative stress response, longevity, and fuel metabolism. Here, in the context of the analysis of a redox modulation of FoxO proteins, the role of (a.) glutathione and (b.) FoxO1 cysteine residues in modulating FoxO activity were assessed employing cultured cells and an in vivo-model, Caenorhabditis elegans (C. elegans)....

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