3,041 research outputs found
Compressive load bearing and bone architecture of lumbar vertebrae in terms of sex and aging
Relation between vertebral compressive strength and trabecular architecture is presented in terms of aging and sex. Complex in vitro medical-engineering analysis of cadaver human lumbar L1 and L2 vertebrae was executed: densitometry, CT, MRI, mechanical test and histology, in aspect of osteoporosis. In this paper the results of the mechanical test are detailed only. The compressive mechanical parameters, like limit stress and strain, proportional stress and strain, Young modulus, ductility, energy absorption capacity were determined. Morphometry analysis was based on the CT pictures. Density and diameter of trabeculae were measured. Correlation between morphometric and mechanical properties was evaluated in terms of aging, sex and bone mineral density
Pion condensation in the two--flavor chiral quark model at finite baryochemical potential
Pion condensation is studied at one--loop level and nonzero baryochemical
potential in the framework of two flavor constituent quark model using the
one--loop level optimized perturbation theory for the resummation of the
perturbative series. A Landau type of analysis is presented for the
investigation of the phase boundary between the pion condensed/non-condensed
phases. The statement that the condensation starts at \muI = m_{\pi} is
slightly modified by one--loop corrections. The second order critical surface
is determined and analysed in the \muI-\muB-T space. The \muI dependence of
the one--loop level charged pion pole masses is also studied.Comment: 12 pages, 5 figures, submitted to PR
Building valoristaion strategies for biodiverse products - the approach
The market valorisation of ‘diverse food products’ is crucial to increase diversity in farming systems. It involves multiple actors, from the field to the table, and requires an integrated approach to take into account several dimensions involved
Building Valorisation Strategies for Biodiverse Products - Case Studies
The market valorisation of ‘diverse food products’ is crucial to promote agrobiodiversity. Despite the differences due to the specific contexts, valorisation strategies show relevant common features
Improvements to Existing Transit Detection Algorithms and Their Comparison
In Tingley (2003), all available transit detection algorithms were compared
in a simple, rigorous test. However, the implementation of the Box-fitting
Least Squares (BLS) approach of Kovacs et al. (2002) used in that paper was not
ideal for those purposes. This letter revisits the comparison, using a version
of the BLS better suited to the task at hand and made more efficient via the
knowledge gained from the previous work. Multiple variations of the BLS and the
matched filter are tested. Some of the modifications improve performance to
such an extent that the conclusions of the original paper must be revised.Comment: 4 paper, 0 figures, accepted for publication in Astronomy &
Astrophysics Letter
ZnO layers deposited by Atomic Layer Deposition
The structure of 40 nm thick epitaxial ZnO layers grown on single crystalline
sapphire and GaN substrates by atomic layer deposition has been studied using transmission
electron microscopy. The growth is carried out between 150°C and 300°C without any buffer
layer using di-ethyl zinc and water precursors. The ZnO layer on sapphire is found to be
polycrystalline, which is probably due to the large misfit (~15 %) and the relatively low
deposition temperature. However, the small misfit (~1.8 %) between the ZnO layer that is
deposited on GaN at 300°C resulted in a high quality single crystalline layer
Retention Behaviour of MNOS Memory Devices with Embedded Si or Ge Nanocrystals – Computer Simulation
The charge retention behaviour of MNOS structures with embedded Si or Ge nanocrystals are studied by computer simulation. It is obtained that the oxide thickness and the location of nanocrystlas affect the retention behaviour very strongly. The retention time changes from a few ms to several years.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3538
Модификация состава лесообразующих пород ЗАО Bakonyerdő в лесничестве Papa
Были исследованы медленно растущие леса из робинии псевдоакации на площади 250 га в лесничестве Pápa ЗАО Bakonyerdő на трех пробных площадях (Egyházaskesző, Kemeneshőgyész, Magyargencs). Леса на выбранных ПП достигнут возраста рубки в течение следующего 10-летнего периода лесной таксации. Задачей работы было выяснение взаимосвязи между параметрами древостоя и индексами выхода древесины
Conceptual spaces and the consequences of category spanning
A general finding in economic and organizational sociology shows that objects that span categories lose appeal to audiences. This paper argues that the negative consequences of crossing boundaries are more severe when the categories spanned are distant and have high contrast. Available empirical strategies do not incorporate information on the distances among categories. Here we introduce novel measures of distance in conceptual space and derive measures for typicality, category contrast, and categorical niche width. Using the proposed measurement approach, we test our theory using data on online reviews of books and restaurants
Medium-resolution echelle spectroscopy of pulsating variables and exoplanet host stars with sub-meter telescopes
Here we present two of our interesting results obtained over the last 18
months from spectroscopic monitoring of binary pulsating stars and exoplanet
host stars. Our investigations are very promising by demonstrating that modern
fiber-fed spectrographs open a whole new chapter in the life of small national
and university observatories.Comment: 3 pages, 3 figures. To be published in the proceedings of the
workshop on "Observing techniques, instrumentation and science for
metre-class telescopes", Sep. 2013, Tatranska Lomnica, Slovaki
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