Browsing Naturwissenschaften, Mathematik und Informatik by Title
Now showing items 3441-3460 of 5496
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Obere und untere Schranken für eingeschränkte Parity-Branchingprogramme
(2006-08-15)Boolean Functions are classified in complexity classes by the upper and lower bounds of the resources a computation required to solve the function in a certain computation model.Thus one ... -
Oberflächenchemie an Silicium-Nanopartikeln
(2009-02-05)Two nanocrystalline silicon powders from industrial production that differ in their primary particle size (50-300 nm and 5-10 nm), were used for surface modifications on the nanometer scale. ... -
Oberflächenstrukturen modulierter Systeme - Darstellung von regelmäßig angeordneten, polaren Nanodomänen mittels Piezoresponse Force Microscopy
(2020-07-23)Piezo force microscopy has been used to visualize nanoscaled surface charge density waves in a modulated ferroelectric system for the first time. Those self-organized structures are found in incommensurate systems close ... -
Objectives, management practices, and perspectives of small-scale private forest owners
(2024-01-11)Climate change and diverse societal demands ranging from resource use and recreation to biodiversity conservation are influencing forests today and have sparked an intensive debate about future forest management. One ... -
Observation of the Standard Model Higgs boson produced in association with a pair of top quarks at $\sqrt{s} = 13 \, \text{TeV}$ with the ATLAS experiment at the LHC with emphasis on the decay of the Higgs boson into a $b\bar{b}$-pair in the single-lepton channel
(2019-10-30)The top quark is the heaviest elementary particle in the Standard Model and has an expected Yukawa coupling to the Higgs boson of order unity. The value of this coupling is a key ingredient to unravel the nature of the ... -
Observationally driven 3D MHD model of the solar corona above a magnetically active region
(2014-07-15)Context: The corona of the Sun can be observed since 1932 with instruments occulting the solar disc. Only few years later it became clear that the corona is way hotter than the visible solar surface and since then, the ... -
Observations and modeling of polar faculae on the Sun
(2004-12-21)In this work the structure and dynamics of polar faculae on the Sun, which constitute an important part of the magnetic solar cycle, were studied by means of high resolution spectropolarimetric ... -
Observations of large-scale solar flows
(2021-04-13)In this dissertation, several components of large-scale solar flows are studied observationally: solar equatorial Rossby waves (waves of radial vorticity), large-scale convection, and surface flows around active regions. ... -
Observations, analysis and interpretation with non-LTE of chromospheric structures on the Sun
(2008-05-27)The Sun possesses a complex layer called chromosphere, which extends above the overwhelmingly bright photosphere. With decreasing density, the solar magnetic fields start here to dominate the dynamics, giving rise to new ... -
Occurrence and genetic diversity of Verticillium longisporum lineages in Europe and their interaction with oilseed rape, Brassica napus L.
(2022-09-22)The current threat that V. longisporum exerts on oilseed rape production, as well as the knowledge gaps in the biology of this pathogen, have motivated the performance of this study, which aimed to further characterize the ... -
Occurrence and Importance of Foliar Diseases on Maize (Zea mays L.) in Central Europe
(2018-07-09)In the last decade, the acreage of maize has increased continuously in Central Europe due to its high yield and diverse uses as food, feed and bio-energy. This has led to more intense maize cultivation in many regions with ... -
Occurrence and significance of Fusarium and Trichoderma ear rot in maize
(2020-10-23)Ear rots, caused by fungi, are among the most important maize diseases worldwide causing severe yield losses and a reduction of grain quality. Several toxigenic Fusarium species are known to cause yield losses and reduce ... -
Occurrence, spread and pathogenicity of different Beet necrotic yellow vein virus (BNYVV) isolates
(2007-12-19)Rhizomania (beet necrotic yellow vein virus, BNYVV) represents an important sugar beet disease, which is transmitted by the biotrophic plasmodiophoromycete Polymyxa betae. As long as the disease is not controlled it can ... -
OCT1-mediated cellular drug uptake and interactions between drug transport and drug metabolism
(2012-12-07)OCT1 is a polyspecific organic cation transporter belonging to the solute carrier gene family SLC22. Human OCT1 is mainly expressed on the sinusoidal membrane of hepatocytes and thus may play an important role in ... -
Odor Modulation of Electrical and [Ca<sup>2+</sup>]i Activities in Neurons of the Olfactory Bulb
(2006-07-10)The olfactory bulb is the first relay stage that processes input from the sensory periphery and relays the information to many high-ordered cortical regions. Despite stimulus activity has ... -
Odour signals relevant to beetles in deadwood habitats - odorants, olfaction and behaviour.
(2012-09-26)The overall objective of this work was to evaluate and determine volatile chemical cues (infochemicals) that determine insect-wood interactions. The deadwood habitat comprises species that reproduce and spend obligatory ... -
Of Resonances and Radicals – Hydrate Studies for Benchmarking
(2024-02-22)Theory experiment benchmarks are a valuable tool to improve quantum numerical methods. To provide experimental data suitable for benchmarking, this work focuses on the investigation of jet cooled hydrate clusters using ... -
Off-farm labor supply and various related aspects of resource allocation by agricultural households
(1998-01-02)This dissertation deals with off-farm labor supply of agricultural households in Germany in three different contexts of resource allocation; the farm labor supply behavior, the intrahousehold interdependence in time ... -
Oil Palm and Rubber Tree Transpiration: Topography, Flooding and Tree admixture in Jungle Rubber Stands
(2017-03-27)In post-forest plantation landscapes of lowland Sumatra, I studied (1) effects of topography and flooding on transpiration by mono-cultural oil palm and rubber tree plantations, and (2) tree water use rates and tree soil ... -
Oil palm expansion among Indonesian smallholders - adoption, welfare implications and agronomic challenges
(2015-05-29)Oil palm has become one of the most rapidly expanding crops throughout the humid tropics. Over the last two decades, the area under oil palm has almost tripled and its production more than quadrupled. This development is ...