Rundschau Eine Prüfanlage für Schwingungs- und Beschleunigungsmesser (Schütteltisch).

Ohne Zusammenfassung     

Rundschau

Ohne Zusammenfassung     

Rundschau

Ohne Zusammenfassung     

Comparison of algorithms and classifiers for stride detection using wearables

Neural Computing and Applications - Sensor-based systems for diagnosis or therapy support of motor dysfunctions need methodologies of automatically stride detection from movement sequences. In this...     

Jamming rheology of model cementitious suspensions composed of comb‐polymer stabilized magnesium oxide particles

The colloidal microstructure of concentrated suspensions containing anionic comb‐polymer‐stabilized magnesium oxide (MgO) particles in water was analyzed by shear rheometry for indications of changes in particle microstructure based on particle size and comb‐polymer usage. As the suspensions were sheared at different rates, jamming in the sheared MgO suspensions was observed as shear stress overshoots. The shear‐induced evolution of the suspension's microstructure was strongly related to the perceived interactions between neighboring MgO particles in the suspension. In the jammed state, interactions are believed to be enhanced by the formation of entanglements between opposing comb‐polymer side‐chains. Steric repulsion between side‐chains was lessened for large particles on account of their diameters, which further enabled side‐chain entanglement during close particle contact under shear. Suspensions with relatively wide particle size distributions (0.5–400 μm) were theorized to form hydrocluster aggregates, while suspensions with narrower particle size distributions (0.5–40 μm) most likely resulted in networked microstructures under the influence of the chain entanglements from the adsorbed comb‐polymer. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40429.     

A strong prognostic variable in endometrial carcinoma: flow cytometric S-phase fraction

BACKGROUND: The purpose of this study was to determine the role of flow cytometric S-phase fraction as a prognostic factor in patients with endometrial adenocarcinoma. METHODS: The study included 80 patients with endometrial adenocarcinoma of endometrioid type who were followed regularly between 1984-1995 in the Department of Obstetrics and Gynecology at Cerrahpasa Faculty of Medicine in Istanbul, Turkey. The method employed for the flow cytometric analysis was modified from Hedley et al. RESULTS: The S-phase fraction was identified as the most significant variable associated with death from endometrial carcinoma of endometrioid type by the Cox proportional hazards model. The risk of death was significantly higher in patients with S-phase values greater than 20%. Aneuploidy and DNA indexes were also significant prognostic variables. CONCLUSIONS: The S-phase fraction is considered to be a significant prognostic variable in identifying those patients with endometrial carcinoma who have a poor prognosis. The authors believe that S-phase fraction distinguishes those patients who may benefit from additional treatment approaches.     

Customized television: standards compliant advanced digital television

This paper describes a European Union supported collaborative project called CustomTV based on the premise that future TV sets will provide all sorts of multimedia information and interactivity, as well as manage all such services according to each user's or group of user's preferences/profiles. We have demonstrated the potential of recent standards (MPEG-4 and MPEG-7) to implement such a scenario by building the following services: an advanced EPG, weather forecasting, and stock exchange/flight information.     

Grain-Boundary Grooving of Plasma-Sprayed Yttria-Stabilized Zirconia Thermal Barrier Coatings

The focus of this study was to determine the mechanisms responsible for the microstructural changes of plasma-sprayed 7 wt% Y₂O₃–ZrO₂ thermal barrier coatings with annealing from 800° to 1400°C. Mullins's thermal grooving theories have been applied to plasma-sprayed TBCs to determine the dominant mass transport mechanism at various temperatures. Grain-boundary groove widths were measured as a function of annealing time and temperature using atomic force microscopy (AFM). The same collection of grains was analyzed after progressive heat treatments. Surface diffusion was found to be the dominant diffusion mechanism at 1000°C, corresponding to the disappearance of intralamellar cracks at that temperature. At 1100°C, both surface and volume diffusion were active. Volume diffusion, found to be the dominant diffusion mechanism at 1200°C and above, was responsible for the sintering of interlamellar pores observed from AFM analysis of a single, progressively heat-treated interlamellar boundary. Surface roughening was observed to coarsen with increased annealing time and disappear with increased annealing temperature.