the pressure drop of refrigerant r-134a flow boiling inside a horizontal tube has been investigated experimentally. the test set-up which was used in this investigation is a well instrumented vapor compression refrigeration system. these instruments are thermocouples, flow meter, pressure gauges and the pressure drop measuring apparatus. this system consisted of three electrically heated evapor...

We present a broad-brush survey of the phenomenology, history and importance of the electron-cloud effect (ECE). We briefly discuss the simulation techniques used to quantify the electron-cloud (EC) dynamics. Finally, we present in more detail an effective theory to describe the EC density build-up in terms of a few effective parameters. For further details, the reader is encouraged to refer to...

Transport and build-up of tropospheric trace gases during the MINOS campaign: Comparision of GOME, in situ aircraft measurements and MATCH-MPIC-data A. Ladstätter-Weißenmayer, J. Heland, R. Kormann, R. v. Kuhlmann, M. G. Lawrence, J. Meyer-Arnek, A. Richter, F. Wittrock, H. Ziereis, and J. P. Burrows Institute of Environmental Physics, University of Bremen, P.O. Box 330440, D-28334 Bremen, Germ...

The appearance of the upper anterior teeth in the preoperative situation was unsatisfactory. Tooth 11 looked particularly unattractive. Neither its shape nor its shade satisfied the standards of a high-quality dental restoration. In order to obtain a clearer picture of the preoperative situation, a greyscale image was produced (Figure 1). This image illustrates the insufficient brilliancy as we...

’ university’s legendary debating society) a week after that. Coaches were to carry the Oxford students to the London event, and protests had to be organised for Clegg’s visit. As the capital greeted thousands of students from across the UK on a bright crisp November morning, the news emerged that Clegg had cancelled his visit to Oxford “due to an unfortunate clash of diaries”. The Oxford stude...

designing and manufacturing the multiple jets simulator and experimental investigation of the multiple jets in crossflow at low velocity ratios have been studied together with design and build a low-speed wind tunnel. a specific rake is used to determine the flow field pressure and changes in static pressure measured by pressure taps in the near field of the jets. there are generally three regi...