A big Picard theorem for quasiregular mappings into manifolds with many ends

We study quasiregular mappings from a punctured Euclidean ball into -manifolds with many ends and prove, by using Harnack's inequality, a version of the big Picard theorem.

     

Temperature measurement of quark-gluon plasma formed in high energy nucleus-nucleus collisions

We discuss lepton pair and real photon emission from quark-gluon plasma, which is very likely to be formed in high energy nucleus-nucleus collisions. Measurement of pair production crosssection will provide one with accurate information of the temperature of this plasma.     

Dual properties of inclusive spectra

The dual properties of the inclusive reaction π^?p → pX are studied over a wide energy range by exploiting the scaling behaviour. Semi-local duality is found to be well satisfied. An energy-dependent triple-Regge analysis reveals a strong triple-pomeron coupling. There is some evidence of an abnormal component in which diffractively produced resonances are dual to pomeron exchange. Combining duality with factorization leads to relations between production cross sections of meson and baryon resonances in πp and pp collisions, which are compatible with existing experimental data.     

Quantum theory of measurement and the polar decomposition of an interaction

The measurement-theoretic content of the polar decomposition of an interaction is analyzed. It is shown that the polar decomposition arises exactly from the strong correlation premeasurement of a discrete physical quantity.     

Experimental tests of the factorisation of Regge trajectories in the proton fragmentation region

We present double differential cross sections for the reactions K^? + p → π^± + anything at 8.25 GeV/c. Using published data for reactions K⁺ + p→ π^? + anything and p + p → π⁺ anything we predict the differential cross sections for γ + p → π^? + anything, π^? + p → π^? + anything and π^? + p → π⁺ + anything in the target fragmentation region based on factorisation of the pomeron and Regge trajectories. Our predictions agree with the experimental data and support the hypothesis of factorisation of the Regge trajectories in the target fragmentation region.     

Integrated Amplifier Circuits for 60 GHz Broadband Telecommunication

Wide frequency bandwidth has been internationally allocated for unlicensed operation around the oxygen absorption frequency at 60 GHz. A power amplifier and a low noise amplifier are presented as building blocks for a T/R-unit at this frequency. The fabrication technology was a commercially available 0.15 m gallium arsenide (GaAs) process featuring pseudomorphic high electron mobility transistors (PHEMT). Using on-wafer tests, we measured a gain of 13.4 dB and a +17 dBm output compression point for the power amplifier at 60 GHz centre frequency when the MMIC was biased to 3 volts V_dd. At the same frequency, the low noise amplifier exhibited 24 dB of gain with a 3.5 dB noise figure. The AM/AM and AM/PM characteristics of the power amplifier chip were obtained from the large-signal S-parameter measurement data. Furthermore, the power amplifier was assembled in a split block package, which had a WR-15 waveguide interface in input and output. The measured results show a 12.5 dB small-signal gain and better than 8 dB return losses in input and output for the packaged power amplifier.     

Unitary and Antiunitary Operators Mapping Vectors to Parallel or to Orthogonal Ones, with Applications to Symmetry Transformations

Unitary and antiunitary operators which map vectors either to parallel or to orthogonal vectors are characterized. As an application the results are used to show that symmetry transformations induced by real functions are identity transformations.     

Flexural Properties of Glass Fibre Reinforced Composite with Partially Biodegradable Polymer Matrix

Summary: The aim of this study was to evaluate flexural properties of a partially biodegradable glass fibre reinforced composite after water immersion and dehydration. In addition water sorption and solubility was determined. E-glass fibres were preimpregnated with a biodegradable biopolymer of poly(hydroxyproline) amide (PA). The preimpregnated fibres were then further-impregnated with Bis-GMA–TEGDMA-resin and light polymerized (n = 6). There was also specimen made of plain polymer and FRC without PA. After water immersion and/or dehydration, the specimens were tested by the three-point bending test. The flexural strength and Young's modulus was increased in most cases after water immersion and dehydration except for PA containing specimens. The water sorption was <50 µg/mm³ for all studied specimens and solubility was 20 µg/mm³ for specimens without PA and 35 µg/mm³ for specimens with PA.     

{2,2′‐[(R,R)‐Cyclo­hexane‐1,2‐diyl­bis(nitrilo­methyl­idyne)]­bis[6‐tert‐butyl‐4‐(tri­phenyl­phosphonio­methyl)­phenol­ato]‐O,N,N′,O′}copper(II) dichloride hexakis­(deutero­chloro­form) solvate

The title compound, [Cu(C₆₆H₆₈N₂O₂P₂)]Cl₂·6CDCl₃, consists of complex cations, chloride ions and deutero­chloro­form solvate mol­ecules. The complex cation crystallizes in two different conformations. In both cases, Cu^II ions lie on twofold axes and the geometry around them is slightly distorted square planar. The dihedral angles between the N/Cu/N and O/Cu/O planes are 5.6 (9) and 3.9 (10)° for mol­ecules A and B, respectively.