33,523 research outputs found
Final State Correlations at LEP 2: Bose-Einstein Correlations and the W Mass
Recent experimental results on Bose-Einstein correlations are presented.
Emphasis will be put on the measurement of between-W correlations in WW events
at LEP 2.Comment: 4 pages, 6 figures, presented at EPS HEP2003, Aachen, July 200
Top Physics at the LHC
The LHC will be a top quark factory. In this note, the central role of the
top quark for LHC physics will be discussed, and an overview will be given of
the studies of top quark properties in preparation, with an emphasis on the
systematic uncertainties that will dominate most measurements.Comment: 6 pages, 8 figures. Contribution to the proceedings of Heavy Quarks
and Leptons, Melbourne, 200
Reducing russeting of organically grown Elstar to increase quality
Sales organisations indicated that opportunities for organic apples sales can increase
when quality increases, in particular reducing the amount of russeting.
The use of copper is probably the most important factor for russeting. Therefore a worst
case scheme was compared with a scheme with reduced copper application. Furthermore,
there was a particular interest in the effects on russeting of potassium bicarbonate
(Armicarb) because this product might be an important element in a copper free fungicide
scheme. Application of Armicarb was investigated on wet or dry canopy and effects of two
different dosages were studied. All the schemes were compared with a worst case organic
fungicide scheme with copper. The experiment was done on two year old Elstar trees
because Elstar is the most important organically grown cultivar in the Netherlands. Effects
of the schedules on russet and scab control were evaluated. At harvest no effects were
found on scab. Between the different schemes with copper no differences were found in
amount of russet. Only the highest dosage of Armicarb (10 kg/ha) and the schedules with
Armicarb on a wet canopy gave more russet compared with the worst case scheme. Also
effects on fruit rot were evaluated
Non score-dependency: Theory and assessment
Untrained listeners demonstrate implicit knowledge of syntactic patterns and principles. Untrained generative music ability, for example singing, humming, and whistling, is a largely unconscious or intuitive application of these patterns and principles. From the viewpoint of embodied cognition, listening to music should evoke an internal representation or motor image which, together with the perception of organized music, should form the basis of musical cognition. Indeed, that is what listeners demonstrate when they sing, hum, or whistle familiar and unfamiliar tunes or when they vocally or orally improvise continuations to interrupted phrases. Research on vocal improvisation using continuations sung to an interrupted musical phrase, has shown that one’s cultural background influences the music generated. That should be the case for instrumentalists as well: when they play familiar or unfamiliar tunes by ear in different keys (transposition) or when they improvise variations, accompaniments, or continuations to interrupted phrases, the music they generate should reflect the same cognitive structures as their oral improvisations. This study is attempting to validate a test of (non) scoredependency that will enable assessment of the music student’s implicit knowledge of these structures during performance on the principal instrument
Institutions for Climate Adaptation: An Inventory of Institutions in the Netherlands that are Relevant for Climate Change
One of the goals of project IC12, a research project of the Climate changes Spatial Planning programme, is to assess if the formal institutions operating in the Netherlands are improving or hampering adaptive capacity. In order to answer the research question, the most important documents referring to those institutions need to be evaluated. This document presents an initial inventory of these adaptation institutions – i.e. policy plans, laws and directives, reports and other documents that seemed relevant to the question at hand
The College and Career Experiences of Graduates of the College of Agriculture at Kansas State University 1978-1988
Teaching/Communication/Extension/Profession,
A Unified Gravity-Electroweak Model Based on a Generalized Yang-Mills Framework
Gravitational and electroweak interactions can be unified in analogy with the
unification in the Weinberg-Salam theory. The Yang-Mills framework is
generalized to include space-time translational group T(4), whose generators
T_{\mu}(=\p/\p x^{\mu}) do not have constant matrix representations. By
gauging in flat space-time, we have a new
tensor field which universally couples to all particles and
anti-particles with the same constant , which has the dimension of length.
In this unified model, the T(4) gauge symmetry dictates that all wave equations
of fermions, massive bosons and the photon in flat space-time reduce to a
Hamilton-Jacobi equation with the same `effective Riemann metric tensor' in the
geometric-optics limit. Consequently, the results are consistent with
experiments. We demonstrated that the T(4) gravitational gauge field can be
quantized in inertial frames.Comment: 12 pages. To be published in "Modern Physics Letters A
The Way We Measure: Comparison of Methods to Derive Radial Surface Brightness Profiles
The breaks and truncations in the luminosity profile of face-on spiral
galaxies offer valuable insights in their formation history. The traditional
method of deriving the surface photometry profile for face-on galaxies is to
use elliptical averaging. In this paper, we explore the question whether
elliptical averaging is the best way to do this. We apply two additional
surface photometry methods, one new: principle axis summation, and one old that
has become seldom used: equivalent profiles. These are compared to elliptically
averaged profiles using a set of 29 face-on galaxies. We find that the
equivalent profiles match extremely well with elliptically averaged profiles,
confirming the validity of using elliptical averaging. The principle axis
summation offers a better comparison to edge-on galaxies.Comment: Accepted for publication by Monthly Notices of the R.A.S. A hi-res
version is available at http://www.astro.rug.nl/~vdkruit/Petersetal-VI.pd
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