Study of the pd→3HeK+K−pd\to ^3\textrm{He} K^+K^- and pd→3Heϕpd\to ^3\textrm{He} \phi reactions close to threshold

Two--kaon production in proton--deuteron collisions has been studied at three energies close to threshold using a calibrated magnetic spectrograph to measure the final $^3$He and a vertex detector to measure the $K^+K^-$ pair. Differential and total cross sections are presented for the production of $\phi$--mesons, decaying through $\phi\to K^+K^-$, as well as for prompt $K^+K^-$ production. The prompt production seems to follow phase space in both its differential distributions and in its energy dependence. The amplitude for the $pd\to ^3${He}$\phi$ reaction varies little for excess energies below 22 MeV and the value is consistent with that obtained from a threshold measurement. The angular distribution of the $K^+K^-$ decay pair shows that near threshold the $\phi$--mesons are dominantly produced with polarization $m=0$ along the initial proton direction. No conclusive evidence for $f_0(980)$ production is found in the data.Comment: 13 figure

Experimental study of the pd(d p) → 3 He ππ reactions close to threshold

New experimental data on the pd → 3 He π+π− reaction obtained with the COSY-MOMO detector below the three-pion threshold are presented. The reaction was also studied in inverse kinematics with a deuteron beam and the higher counting rates achieved were especially important at low excess energies. The comparison of these data with inclusive pd → 3 He X0 rates allowed estimates also to be made of π0π0 production. The results confirm our earlier findings that, close to threshold, there is no enhancement at low excitation energies in the π+π− system, where the data seem largely suppressed compared with phase space. Possible explanations for this behavior, such as strong p waves in the π+π− system or the influence of two-step processes, are explored

How to Teach ‘New Tools’ in Landscape Architecture in the Digital Overload

The central theme of the paper is the introduction of hands-on tools showing the integration of information technology within a postgraduate study program (MAS LA) for landscape architects. What has already become a part of the discourse in the field of architecture – generic design – is now also finding more resonance in the context of large-scale landscape architectural design. If one studies the educational backgrounds of landscape architects, however, they often do not match the same standard as those of architects. A solid background in the area of innovative use of information technology, especially computer-assisted design and CAD/CAM construction is only at a preliminary state at most universities. The critical arguments in the choice of the selected medium and the building up of a continuous digital chain stand here in the forefront. The aim is not to improve the quality of the landscape design based on the variety of the applied tools, but rather through the sensible use of the said. Reflections as well as questions of method and theory stand at the forefront of our efforts

How to Teach \u91New Tools\u92 in Landscape Architecture in the Digital Overload

The central theme of the paper is the introduction of hands-on tools showing the integration of information technology within a postgraduate study program (MAS LA) for landscape architects. What has already become a part of the discourse in the field of architecture \u96 generic design \u96 is now also finding more resonance in the context of large-scale landscape architectural design. If one studies the educational backgrounds of landscape architects, however, they often do not match the same standard as those of architects. A solid background in the area of innovative use of information technology, especially computer-assisted design and CAD/CAM construction is only at a preliminary state at most universities. The critical arguments in the choice of the selected medium and the building up of a continuous digital chain stand here in the forefront. The aim is not to improve the quality of the landscape design based on the variety of the applied tools, but rather through the sensible use of the said. Reflections as well as questions of method and theory stand at the forefront of our efforts

On a relation between particle size distribution and mixing layer height.

Ceilometers are applied to detect layering of the lower atmosphere continuously. This is necessary because not only wind speeds and directions but also atmospheric layering and especially the mixing layer height (MLH) influence exchange processes of ground level emissions. It will be discussed how the ceilometer monitoring information can be used to determine the MLH influence upon the particle size distribution (PSD) which is detected near the ground. The information about atmospheric layering is continuously monitored by uninterrupted remote sensing measurements with the Vaisala ceilometers LD40 and CL31 which are eye-safe commercial lidar systems. Special software for these ceilometers provides routine retrievals of lower atmosphere layering from vertical profiles of laser backscatter data. The meteorological data are collected by the air pollution monitoring station of the Bavarian State Agency of Environment (LfU) at the southern edge of Augsburg and at the airport at the northern edge of Augsburg by the German National Meteorological Service (DWD). PSD are measured at the aerosol measurement station in the centre of Augsburg by the Cooperative Health Research in the Region of Augsburg (KORA). The two intensive measurement periods during the winter 2006/2007 and 2007/2008 are studied. The weather situations are characterized, the meteorological influences upon air pollutant concentrations like wind speed and wind direction are studied and the correlations of ceilometer backscatter densities and MLH with PSD are determined