This research investigates the environment impacts of hospital waste pretreatment residues under landfill conditions. Two techniques - incineration and sterilization - to treat hospital waste were taken into concern. The biodegradability of sterilized hospital waste and leaching behavior of hospital waste incineration ash were investigated, as well as co-dispoal hospital waste pretreatment residues with municipal solid waste. With the research results, a novel approach to treat hospital waste pretreatment residues were concluded.

Darmstadt, Techn. University, Diss., 2006.

Zugl.: Stuttgart, Univ., Diss., 2008

Zugl.: Darmstadt, Techn. Univ., Diss., 2008

Zugl.: Aachen, Techn. Hochsch., Diss., 2009

Wissenschaftliche Schriftenreihe, die Dissertationen der Professur Virtuelle Fertigungstechnik beinhaltet.

TCP-feste Handgelenke dienen der Orientierung eines Werkzeuges an Portalmaschinen. Zum Einsatz kommen sie unter anderem im Bereich "Thermisches Schneiden", wenn Fasenschneiden an Blechen oder die Anarbeitung von räumlichen Konturen an Stahlrohren oder Hohlprofilen gewünscht ist. Kinematisch grenzen sie sich durch die mechanische Entkopplung zwischen Positionierung und Orientierung des Werkzeuges von anderen Maschinenstrukturen ab. Der folgende Pro/Engineer Anwendervortrag umfasst das Erstellen einer Animation mit Pro/E Mechanismen zur Darstellung der Funktionsweise eines TCP-festen Handgelenkes. Außerdem wird die Kalibrierung dieses Handgelenkes an Hand einer Animation gezeigt, welche mit Pro/E DAO (Design Animation Option) erstellt wurde.

Thesis (doctoral)--Hochschule St. Gallen für Wirtschafts-, Rechts- und Sozialwissenschaften, 1990.

Stuttgart, Univ., Diss., 2005.

In Electrochemical Machining (ECM), where the material removal takes place based on the anodic dissolution of the workpiece material, the working distance is one of the most important parameters. Especially in Jet Electrochemical Machining (Jet-ECM), where a micro nozzle is moved over the initial surface of the workpiece in order to apply an electrolytic free jet to produce the desired shapes, the distance between the nozzle and the workpiece becomes even more important. On the one hand a small working distance is aspired to achieve high current densities resulting in a high efficiency of the process. On the other hand the working distance needs to be large enough to avoid damages on the micro nozzle caused by electrical discharges or mechanical contact. Hence, the adjustment of the working gap is essential to realize a precise, effective and secure Jet-ECM process. The control of the gap size is done based on the data gathered before machining by surface measurement. Until now, the initial surface has been detected by electrostatic probing through moving the nozzle stepwise to the work piece surface and detect the voltage drop between the nozzle and the work piece. With this strategy, only a limited number of points can be detected within adequate time. Hence, in most cases only three points of the initial surface are detected in order to adjust the working distance according to the planar inclination of the workpiece. The coordinates of the three detected points are used to calculate the normal vector of the initial surface. In recent studies, another strategy was analysed, which is realized by dividing the surface into smaller areas and respectively calculating the normal vector of each area in order to obtain more accurate data of the initial surface. A further strategy is to use probing along the machining path of the tool and to gather the coordinates of a number of points along the path. The above mentioned methods usually do not ensure the precise control of the gap size especially for the surfaces with complex geometry with locally confined convex and concave shapes and are highly affected by the size of the probe. In this study, the application of a laser scanner is investigated for the measurement of the workpiece surface before machining to gather the required data for the adjustment of the working distance during Jet-EC machining of complicated surfaces.