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This thesis concerns the experimental study of mixing and flow characteristic in turbulent circular impinging jets without and with jet orifice manipulators (i.e. passive-fixed perturbations atthe nozzle exit), without and with swirl. The goal of the studies is to understand the basic mechanisms that control the mixing processes in turbulent impinging jets. The applications of such mixing processe
Centromeres have not yet been functionally defined in higher eu- karyotes, largely due to the huge amounts of repeated DNA in these regions of most species and difficulties of delimiting centromeric from pericentric regions. Also the latter have large quantities of mostly noncoding DNA, expressed cytologically as pericentric heterochromatin. The dipteran Chironomus pallidivittatus is advantageous
The proper handling of alarms is crucial to automated process control. Fault Detection and Isolation techniques have been widely researched to determine such alarms. In practice, many alarms are only distractive and do not represent a fault situation. Here a toolbox, that uses an expert system called LARA, is proposed that aims to reduce the occurrence of so-called nuisance alarms. It is based on
This paper discuss the change in early design imposed by a Product-Service Systems (PSS) perspective onto the design and development phases of engineering design and how this affects the today de-facto standard of virtual modelling of product properties. The approach is exemplified via PSS situations related to aerospace and automotive industry in order to clarify “parameters of change” due to PSS
The dissipated power and the directivity of antennas in a homogeneous, lossy medium are systematically analyzed in this paper. The antennas are ideal and located inside a lossless sphere. In the lossy space outside the sphere, the electromagnetic fields are expanded in a complete set of vector wave functions. The optimal values of the radiation efficiency, the directivity, as well as the power gain a
Arson in school buildings is a big problem in Sweden. The most severe and costly fires start on the outside of the building. In one-storey building the fire can easily spread to the attic space through ventilation openings in the eaves. In this paper, research conducted in regard to detection of external fires in school buildings is presented. A maximum temperature linear detector, a differential
In the EU and in Sweden there is an ongoing work with improvement in the area of sustainability. However, the problem for the management of a real estate company is to the most important sustainable aspects together with the usual economic considerations for an effective long-term maintenance of the building stock. This process will demand tools and methods to estimate the various aspects of susta
