Browsing Naturwissenschaften, Mathematik und Informatik by Title
Now showing items 2851-2870 of 5496
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Machine learning and statistical analysis to identify determinants of survival in primary glioblastoma using genome wide expression studies
(2022-07-05)Glioblastoma (GBM) is the most common and highly aggressive brain tumor. GBM poses unique challenges due to high rates of tumor recurrence ( 34%) and resistance to treatment. Despite advances in treatment strategies, the ... -
Machine Learning-Based Analysis of Bird Vocalizations
(2022-04-01)Acoustic signals are rich in information content. For humans the skill of listening to sounds and extracting relevant information comes effortlessly. However, for computers this task is quite challenging. Machine hearing ... -
Macromolecules in Motion by High-resolution Cryo-EM
(2024-05-06)Protein synthesis, the translation of the genetic code into a defined sequence of amino acids, is a central, highly dynamic and regulated step in gene expression. The well-defined bacterial translation system enables to ... -
Magnesium deficiency induced responses in crop physiology: impacts on photosynthesis, light utilization, and photoprotection
(2021-11-18)Intensive agricultural production without compensation of macro- and micro-nutrients that are taken up by the plants or leached out from the soil by rain, leads to nutrient deficiency in soils and plants. Subsequently, it ... -
Magnetic Activity at the Poles of the Sun
(2008-11-11)This work sheds light on the role of polar faculae with respect to the global magnetic field of the Sun, on the basis of high spatial resolution spectropolarimetric observations, while ... -
Magnetic and activity cycles of cool stars
(2017-10-17)Cool stars are known to exhibit weak to strong magnetic activity. Our nearest cool star, the Sun, is a middle aged and moderately active star with a cyclic generation of its magnetic field, which results in a 22 year ... -
Magnetic field effects on the local tunneling conductivity of La0.75 Ca0.25 MnO3 /MgO thin films
(2008-08-29)Manganites are known for their exceptional properties, such as the metal-insulator transition (MIT) and the colossal magnetoresistance (CMR) effect. These materials show a very rich phase diagram in which the properties ... -
Magnetic flux emergence in the solar photosphere
(2006-06-29)The most prominent magnetic structures on the surface of the Sun are bipolar active regions. These magnetic complexes are comprised of a hierarchy of magnetic structures of different sizes, ... -
Magnetic Tomography
(2006-03-24)We consider the inverse problem of reconstructing a current distribution from its magnetic field that is called magnetic tomography. We study uniqueness issues by investigating the mapping ... -
Magnetische Grenzflächeneffekte in Doppellagen aus V2O3 und den ferromagnetisch geordneten Übergangsmetallen
(2005-01-05)Epitaxially grown thin films of Vanadiumsesquioxide (V2O3) exhibit a metal-insulator transition around 170 K accompanied by antiferromagnetic ordering. This behaviour is well ... -
Magnetische Phasen im Hubbardmodel
(2010-01-14)This work deals with the calculation of magnetic properties for strongly correlated electron systems. One of most important model in this field of physics is the Hubbard model. It describes the situation of, for example, ... -
Magnetische und Elektrische Eigenschaften von Nd0.66(Sr1-yLiy)0.34MnO3 Manganiten
(2003-12-19)From the structural, transport and magnetic properties of Nd0.66(Sr1-yLiy)0.34MnO3 doped with Li the following: -
Magnetization and elastic dynamics in nanostructured metamaterials
(2016-03-24)In this work, magnetization and elastic dynamics in nano-structured artificial materials have been investigated in an all-optical, time-resolved, pump-probe experimental setup. Rich dynamics are brought about by means ... -
Magnetization dynamics in all-optical pump-probe experiments: spin-wave modes and spin-current damping
(2007-02-19)In the field of spintronics, future development demands a new insight into the magnetization relaxation processes in the sub nanosecond regime. With the time resolution inherent, femtosecond ... -
Magneto-microphotoluminescence spectroscopy as a tool for the study of disorder in semiconductor quantum wells
(2007-06-13)This work contributes to the understanding of the relation between structural and optical properties of dimensionally reduced semiconductor heterostructures at the model system of thin ... -
Magneto-structural correlations in molecular magnets containing the S–N motive
(2021-11-15)The present work aims to investigate mono-metallic cobalt and dysprosium complexes containing the S-N motive and put their potential as competitive single-molecule magnets (SMMs) into perspective. To this purpose, experimental ... -
Magneto-thermal conductivity of perovskite manganite films and exchange-spring coupled superlattices
(2024-02-21)In this thesis, thin colossal magnetoresistive perovskite manganite films and superlattices forming an exchange spring magnet were studied regarding their magneto-thermal conductivity. Using the metalorganic aerosol ... -
Magnetoelektrische Eigenschaften von Manganat-Titanat Übergittern
(2010-01-28)Magnetoelectric multiferroics are materials in which the order phenomena ferromagnetism and ferroelectricity coexist. Due to pronounced magnetic as well as electric susceptibility, this ... -
Magnetohydrodynamic Simulation of Reconnection in Turbulent Astrophysical Plasmas
(2016-08-31)Turbulence is ubiquitous at large-Reynolds-number astrophysical plasmas like in the Solar corona. In such environments, the turbulence is thought to enhance the energy conversion rate by magnetic reconnection above ... -
Magnetotellurics and Geomagnetic Depth Sounding in Queensland, South Eastern Australia -Evidence for the Tasman Line?
(2011-11-09)The Tasman Line in eastern Australia is commonly defined as the locus of Rodinia- Gondwana breakup. It is a much discussed concept in the geology and tectonics of eastern Australia. However, ...