219 research outputs found
Cretobestiola, a replacement name for Bestiola Pulawski and Rasnitsyn, 1999 (Hymenoptera: Sphecidae)
We recently described a sphecid wasp genus Bestiola (in Rasnitsyn et al., 1999) to accommodate four species from Lower Cretaceous of Spain, eastern Russia, and Mongolia. This generic name, however, is preoccupied by Bestiola Nikol’skaya (1963), an aphelinid, as pointed to us by Mr. John K. Page (Zoological Records, York, Great Britain) and also by Signor Guido Pagliano (Torino, Italy). We therefore propose the name Cretobestiola to replace it. The name is derived from the Latin names creta (chalk), with reference to Cretaceous geological period, and bestiola (little beast).We recently described a sphecid wasp genus Bestiola (in Rasnitsyn et al., 1999) to accommodate four species from Lower Cretaceous of Spain, eastern Russia, and Mongolia. This generic name, however, is preoccupied by Bestiola Nikol’skaya (1963), an aphelinid, as pointed to us by Mr. John K. Page (Zoological Records, York, Great Britain) and also by Signor Guido Pagliano (Torino, Italy). We therefore propose the name Cretobestiola to replace it. The name is derived from the Latin names creta (chalk), with reference to Cretaceous geological period, and bestiola (little beast)
Cretobestiola, a replacement name for Bestiola Pulawski and Rasnitsyn, 1999 (Hymenoptera: Sphecidae)
Lipid apheresis: oxidative stress, rheology, and vasodilatation
In the treatment of homozygous and therapy-resistant hypercholesterolemia, lipid apheresis enables not only low density lipoprotein (LDL) cholesterol to be lowered by approximately 60%, but also oxidative stress factors to be influenced and adhesion molecules reduced. This was investigated in a group of 12 patients using the heparin-induced extracorporeal LDL precipitation (H.E.L.P.) procedure
Adaptive calculation of pass sequences for open die forging
Open-die forging is one of the oldest forming processes in history, which has been continuously developed through technical innovations. The rapid development in the fields of measurement and control technology and the computing capacity of IT systems in recent decades offer the opportunity to take open-die forging to a higher level. In order to establish a fully autonomous forging process, a forging cell is being set up at the Institute of Metal Forming at TU Bergakademie Freiberg. It consists of two forging presses, a furnace and a KR 360 L280-2 robot arm from KUKA as a manipulator with a load capacity of up to 280 kg. A 3D scanning system allows to capture the workpiece geometry between individual pass sequences or even single press strokes. Additionally, the scanning system is equipped with three thermal imaging cameras, which record the surface temperature during a scan. A central computer controls all individual components of the forging cell
Multiplicity and transverse momentum fluctuations in inelastic proton-proton interactions at the CERN Super Proton Synchrotron
Measurements of multiplicity and transverse momentum fluctuations of charged
particles were performed in inelastic p+p interactions at 20, 31, 40, 80 and
158 GeV/c beam momentum. Results for the scaled variance of the multiplicity
distribution and for three strongly intensive measures of multiplicity and
transverse momentum fluctuations \$\Delta[P_{T},N]\$, \$\Sigma[P_{T},N]\$ and
\$\Phi_{p_T}\$ are presented. For the first time the results on fluctuations
are fully corrected for experimental biases. The results on multiplicity and
transverse momentum fluctuations significantly deviate from expectations for
the independent particle production. They also depend on charges of selected
hadrons. The string-resonance Monte Carlo models EPOS and UrQMD do not describe
the data. The scaled variance of multiplicity fluctuations is significantly
higher in inelastic p+p interactions than in central Pb+Pb collisions measured
by NA49 at the same energy per nucleon. This is in qualitative disagreement
with the predictions of the Wounded Nucleon Model. Within the statistical
framework the enhanced multiplicity fluctuations in inelastic p+p interactions
can be interpreted as due to event-by-event fluctuations of the fireball energy
and/or volume.Comment: 18 pages, 12 figure
Measurement of Production Properties of Positively Charged Kaons in Proton-Carbon Interactions at 31 GeV/c
Spectra of positively charged kaons in p+C interactions at 31 GeV/c were
measured with the NA61/SHINE spectrometer at the CERN SPS. The analysis is
based on the full set of data collected in 2007 with a graphite target with a
thickness of 4% of a nuclear interaction length. Interaction cross sections and
charged pion spectra were already measured using the same set of data. These
new measurements in combination with the published ones are required to improve
predictions of the neutrino flux for the T2K long baseline neutrino oscillation
experiment in Japan. In particular, the knowledge of kaon production is crucial
for precisely predicting the intrinsic electron neutrino component and the high
energy tail of the T2K beam. The results are presented as a function of
laboratory momentum in 2 intervals of the laboratory polar angle covering the
range from 20 up to 240 mrad. The kaon spectra are compared with predictions of
several hadron production models. Using the published pion results and the new
kaon data, the K+/\pi+ ratios are computed.Comment: 10 pages, 11 figure
Bembicine wasps (Hymenoptera: Crabronidae: Bembicinae: Bembicini, except Gorytina) of Rio de Janeiro State (southeast Brazil): inventory of species and notes on biology
Adaptive Stichplanung im Freiformschmieden
Das Freiformschmieden ist eines der ältesten Umformverfahren in der Geschichte, das kontinuierlich durch technische Innovationen weiterentwickelt wurde. Die rasante Entwicklung in den Bereichen der Mess- und Regelungstechnik sowie der Rechenkapazität von IT-Systemen in den letzten Jahrzehnten bietet die Möglichkeit, das Freiform-schmieden auf seine nächste Entwicklungsebene zu heben. Um einen vollautonomen Schmiedeprozess zu etablieren, wird am Institut für Metallformung der TU Bergakademie Freiberg eine Schmiedezelle eingerichtet. Diese Verfügt über zwei Schmiedepressen, einen Ofen und einen Roboterarm vom Typ KR 360 L280-2 der Firma KUKA mit einer Traglast von bis zu 280 kg als Manipulator. Mithilfe eines 3D-Scansystems ist es möglich die Werkstückgeometrie zwischen einzelnen Stichen oder gar Pressenhüben zu erfassen. Weiterhin verfügt das Scansystem über drei Wärmebildkameras, welche während eines Scans die Oberflächentemperatur erfassen. Die einzelnen Komponenten der Schmiedezelle werden über einen Zentralrechner gesteuert
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