6,774 research outputs found
Creep, Strength and Moisture Absorption of Adhesive Bonded FRP Joints
The effects of the environment on adhesive bonded single lap joints formed using XMC-3 and SMC-R50 composites were investigated. Tests were performed at temperatures of 23C and 93C with test coupons immersed in air, water, and 5% NaCl water mixture. The weight changes of both bonded joints (XMC-3 to SMC-R50 and SMC-R50 to SMC-R50) and unbonded materials were measured. Data were also ob tained showing the effects of moisture, temperature, and applied load on changes in weight, on creep deformation, lap shear strength, and separation modes of the joints.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68649/2/10.1177_073168448500400206.pd
Property Tax Lids and the Effect on Kansas
Cross sectional time series data in a partial adjustment model examine local government behavior under an aggregate property tax levy limit and under Truth in Taxation in Kansas. Results indicate that the aggregate levy limit would have continued to restrict property tax revenue and spending had it not been replaced.Public Economics,
Systematic Review Protocol – Final: Have wet meadow restoration projects in the Southwestern U.S. been effective in restoring hydrology, geomorphology, soils, and plant species composition to conditions comparable to wet meadows with minimal human-induced disturbance?
The aim of this review is to evaluate whether wet meadow restoration projects in the Southwestern U.S. have been effective in restoring hydrology, geomorphology, soils, and plant species composition to conditions comparable to wet meadows with minimal human-induced disturbance
Quantum affine Cartan matrices, Poincare series of binary polyhedral groups, and reflection representations
We first review some invariant theoretic results about the finite subgroups
of SU(2) in a quick algebraic way by using the McKay correspondence and quantum
affine Cartan matrices. By the way it turns out that some parameters
(a,b,h;p,q,r) that one usually associates with such a group and hence with a
simply-laced Coxeter-Dynkin diagram have a meaningful definition for the
non-simply-laced diagrams, too, and as a byproduct we extend Saito's formula
for the determinant of the Cartan matrix to all cases. Returning to invariant
theory we show that for each irreducible representation i of a binary
tetrahedral, octahedral, or icosahedral group one can find a homomorphism into
a finite complex reflection group whose defining reflection representation
restricts to i.Comment: 19 page
Black holes admitting a Freudenthal dual
The quantised charges x of four dimensional stringy black holes may be
assigned to elements of an integral Freudenthal triple system whose
automorphism group is the corresponding U-duality and whose U-invariant quartic
norm Delta(x) determines the lowest order entropy. Here we introduce a
Freudenthal duality x -> \tilde{x}, for which \tilde{\tilde{x}}=-x. Although
distinct from U-duality it nevertheless leaves Delta(x) invariant. However, the
requirement that \tilde{x} be integer restricts us to the subset of black holes
for which Delta(x) is necessarily a perfect square. The issue of higher-order
corrections remains open as some, but not all, of the discrete U-duality
invariants are Freudenthal invariant. Similarly, the quantised charges A of
five dimensional black holes and strings may be assigned to elements of an
integral Jordan algebra, whose cubic norm N(A) determines the lowest order
entropy. We introduce an analogous Jordan dual A*, with N(A) necessarily a
perfect cube, for which A**=A and which leaves N(A) invariant. The two
dualities are related by a 4D/5D lift.Comment: 32 pages revtex, 10 tables; minor corrections, references adde
Cultural context and attitudes towards genetically modified food in Greece and West Germany
'Bisherige Untersuchungen haben gezeigt, dass es innerhalb der Europäischen Union zum Teil erhebliche Unterschiede in den Einstellungen zu gentechnisch veränderten Lebensmitteln (GM food) gibt. Die Erklärungen für die gefundenen Einstellungsunterschiede basieren vor allem auf soziodemografische und Wissensvariablen als einstellungsdeterminierende Faktoren der Einstellung gegenüber GM food. Kulturelle Unterschiede werden hingegen als Erklärungsfaktoren kaum in Betracht gezogen. In dem vorliegenden Papier werden Hypothesen über den Einfluss des kulturellen Kontext auf die Ablehnung von GM food formuliert. Diese Hypothesen basieren auf Überlegungen, die sich aus der Kombination des Ansatzes von Hofstede (1997) mit dem Einstellungsmodell von Eagly und Chaiken (1993) ergeben. Die Überlegungen beziehen sich auf Griechenland und Westdeutschland als Länder mit Stellvertreterpotential für einen bestimmten kulturellen Kontext (modern vs. traditional). Als Ergebnis kann festgehalten werden, dass das Wissen über GM food nur in Westdeutschland einen Effekt hat, in Griechenland sind hingegen die negativen Beliefs über GM food von großer Bedeutung für die Einstellung gegenüber GM food. Generell lässt sich festhalten, dass in Westdeutschland eine wesentlich strukturiertere Einstellungsstruktur zu finden ist als dies in Griechenland der Fall ist.' (Autorenreferat)'Although there are strong national differences in people's rejection of in genetical modification in food production (GM food), research mainly examined sociodemographics and knowledge an GM food as general determinants of attitudes towards GM food. Cultural differences seldom are taken into account, usually there are no theoretically founded hypotheses, which can be tested empirically. In the present paper we formulate specific hypotheses an cultural context effects an rejection of GM food by combining Hofstedes (1997) approach with cultural differentiation to a general beliefattitude model as it is represented in the core of Eagly and Chaikens (1993) composite model. Specific hypotheses are formulated for Westgermany and Greece as cases of contrasting cultural contexts (modern vs. traditional pattems of orientation). We find, that knowledge an GM food has an effect an rejecting GM food only in Westgermany, whereas negative beliefs are more important in determining GM food rejection in Greece. Generally, the attitude structure in Westgermany is more differentiated than in Greece, as it is reflected in more variance explained by knowledge, beliefs and sociodemographic status in Westgermany than in Greece.' (author's abstract)
The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion
We report photometric observations of the eclipsing close binary CSS21055
(SDSS J141126+200911) that strongly suggest that the companion to the
carbon-oxygen white dwarf is a brown dwarf with a mass between 0.030 and 0.074
Msun. The measured orbital period is 121.73min and the totality of the eclipse
lasts 125s. If confirmed, CSS21055 would be the first detached eclipsing WD+BD
binary. Spectroscopy in the eclipse could provide information about the
companion's evolutionary state and atmospheric structure.Comment: 6 pages, 5 figure
Confounding effects of snow cover on remotely sensed vegetation indices of evergreen and deciduous trees: An experimental study
SFB754 - data management in large interdisciplinary collaborative research projects: what matters?
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