2,554 research outputs found
Suitability of peach and nectarine cultivars for organic production under pannonic climate conditions in Austria
The suitability of nectarine and peach cultivars for organic production was examined
in a field experiment in the experimental orchard of the institute in Vienna. Therefore,
fifteen cultivars including Redhaven as standard cultivar were planted in 2003 and
cultivated organically.
Characteristics of the cultivars, such as blossom, growth, yield and susceptibility to
frost damage and diseases (Taphrina deformans and Monilinia ssp.) were examined.
Furthermore, fruit quality characteristics were checked in the laboratory.
The results of growth, yield, susceptibility to damages and diseases and fruit quality
showed significant differences among the cultivars. âRedhavenâ, âSweethavenâ,
âRedcalâ, âBenedikteâ and âMireilleâ can be recommended for organic production
regarding the results of susceptibility of peach diseases. âRed Robinâ, âRoyal Gloryâ
and âNectared 6â can partly be recommended. âWeingartenpfirsich Eibesthalâ,
âSungloâ, âDiamond Princessâ, Early Devilâ and âRoyal Gemâ seem to be unsuitable for
commercial organic production
Momentum flow in black-hole binaries. I. Post-Newtonian analysis of the inspiral and spin-induced bobbing
A brief overview is presented of a new Caltech/Cornell research program that is exploring the nonlinear dynamics of curved spacetime in binary black-hole collisions and mergers, and of an initial project in this program aimed at elucidating the flow of linear momentum in binary black holes (BBHs). The âgauge-dependenceâ (arbitrariness) in the localization of linear momentum in BBHs is discussed, along with the hope that the qualitative behavior of linear momentum will be gauge-independent. Harmonic coordinates are suggested as a possibly preferred foundation for fixing the gauge associated with linear momentum. For a BBH or other compact binary, the Landau-Lifshitz formalism is used to define the momenta of the binaryâs individual bodies in terms of integrals over the bodiesâ surfaces or interiors, and define the momentum of the gravitational field (spacetime curvature) outside the bodies as a volume integral over the fieldâs momentum density. These definitions will be used in subsequent papers that explore the internal nonlinear dynamics of BBHs via numerical relativity. This formalism is then used, in the 1.5 post-Newtonian approximation, to explore momentum flow between a binaryâs bodies and its gravitational field during the binaryâs orbital inspiral. Special attention is paid to momentum flow and conservation associated with synchronous spin-induced bobbing of the black holes, in the so-called âextreme-kick configurationâ (where two identical black holes have their spins lying in their orbital plane and antialigned)
Foods, Moods, and Allergies Too a Handbook for the Human Services
I decided to write this book after my colleague, Dr. Judith Ramaley, and I spent a year giving presentations about diet and behavior to groups of our Omaha-Lincoln, Nebraska, area. These groups included human services agency staffs, abusive parents, psychotherapists, medical students, parents of newborns, social work students, preschool teachers, child development students and faculty, staff in a child assessment facility, and others
Associating object names with descriptions of shape that distinguish possible from impossible objects.
Five experiments examine the proposal that object names are closely linked torepresentations of global, 3D shape by comparing memory for simple line drawings of structurally possible and impossible novel objects.Objects were rendered impossible through local edge violations to global coherence (cf. Schacter, Cooper, & Delaney, 1990) and supplementary observations confirmed that the sets of possible and impossible objects were matched for their distinctiveness. Employing a test of explicit recognition memory, Experiment 1 confirmed that the possible and impossible objects were equally memorable. Experiments 2â4 demonstrated that adults learn names (single-syllable non-words presented as count nouns, e.g., âThis is a daxâ) for possible objectsmore easily than for impossible objects, and an item-based analysis showed that this effect was unrelated to either the memorability or the distinctiveness of the individual objects. Experiment 3 indicated that the effects of object possibility on name learning were long term (spanning at least 2months), implying that the cognitive processes being revealed can support the learning of object names in everyday life. Experiment 5 demonstrated that hearing someone else name an object at presentation improves recognition memory for possible objects, but not for impossible objects. Taken together, the results indicate that object names are closely linked to the descriptions of global, 3D shape that can be derived for structurally possible objects but not for structurally impossible objects. In addition, the results challenge the view that object decision and explicit recognition necessarily draw on separate memory systems,with only the former being supported by these descriptions of global object shape. It seems that recognition also can be supported by these descriptions, provided the original encoding conditions encourage their derivation. Hearing an object named at encoding appears to be just such a condition. These observations are discussed in relation to the effects of naming in other visual tasks, and to the role of visual attention in object identification
The effect of atmospheric sulfate reductions on diffuse radiation and photosynthesis in the United States during 1995â 2013
Aerosol optical depth (AOD) has been shown to influence the global carbon sink by increasing the fraction of diffuse light, which increases photosynthesis over a greater fraction of the vegetated canopy. Between 1995 and 2013, U.S. SO2 emissions declined by over 70%, coinciding with observed AOD reductions of 3.0â Ă¹â 0.6% yrâ 1 over the eastern U.S. In the Community Earth System Model (CESM), these trends cause diffuse light to decrease regionally by almost 0.6% yrâ 1, leading to declines in gross primary production (GPP) of 0.07% yrâ 1. Integrated over the analysis period and domain, this represents 0.5 Pgâ C of omitted GPP. A separate upscaling calculation that used published relationships between GPP and diffuse light agreed with the CESM model results within 20%. The agreement between simulated and dataâ constrained upscaling results strongly suggests that anthropogenic sulfate trends have a small impact on carbon uptake in temperate forests due to scattered light.Key PointsAerosol optical depth has decreased due to reduced sulfur dioxide emissionsReduced diffuse radiation decreased cumulative gross primary productivity by 0.5 Pg C during 1995â 2013CESM trends agree with upscaled flux tower results within 20%Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/134448/1/grl55002.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/134448/2/grl55002-sup-0001-supinfo.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/134448/3/grl55002_am.pd
Singular value decomposition applied to compact binary coalescence gravitational-wave signals
We investigate the application of the singular value decomposition to
compact-binary, gravitational-wave data-analysis. We find that the truncated
singular value decomposition reduces the number of filters required to analyze
a given region of parameter space of compact binary coalescence waveforms by an
order of magnitude with high reconstruction accuracy. We also compute an
analytic expression for the expected signal-loss due to the singular value
decomposition truncation.Comment: 4 figures, 6 page
Infrared Spectra of Pyroxenes (Crystalline Chain Silicates) at Room Temperature
Pyroxene crystals are common in meteorites but few compositions have been
recognized in astronomical environments. We present quantitative
room-temperature spectra of 17 Mg-- Fe-- and Ca--bearing ortho- and
clinopyroxenes, and a Ca-pyroxenoid in order to discern trends indicative of
crystal structure and a wide range of composition. Data are produced using a
Diamond Anvil Cell: our band strengths are up to 6 times higher than those
measured in KBr or polyethylene dispersions, which include variations in path
length (from grain size) and surface reflections that are not addressed in data
processing. Pyroxenes have varied spectra: only two bands, at 10.22~m and
15.34~m in enstatite (En), are common to all. Peak-wavelengths
generally increase as Mg is replaced by Ca or Fe. However, two bands in
MgFe-pyroxenes shift to shorter wavelengths as the Fe component increases from
0 to 60 per cent. A high-intensity band shifts from 11.6~m to 11.2~m
and remains at 11.2~m as Fe increases to 100~per~cent; it resembles an
astronomical feature normally identified with olivine or forsterite. The
distinctive pyroxene bands between 13~ and 16~m show promise for their
identification in MIRI spectra obtained with JWST. The many pyroxene bands
between 40 and 80~m could be diagnositic of silicate mineralogy if data
were obtained with the proposed SPICA telescope. Our data indicate that
comparison between room-temperature laboratory bands for enstatite and cold
astronomical dust features at wavelengths m can
result in the identification of (Mg,Fe)- pyroxenes that contain 7--15 % less
Fe-- than their true values because some temperature shifts mimic some
compositional shifts. Therefore some astronomical silicates may contain more
Fe, and less Mg, than previously thought.Comment: 16 pages, 10 figures.accepted in MNRA
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