Authors:Sommai Khantong, Mohammad Nazir Ahmad Sharif, and Ahmad Kamil Mahmood
forecasting, flood forecasts updating, the current flood situation assessment, flood control operation and evacuation [ 17, 18 ]. 2.2 Ontology Ontology is originally a philosophy term, and has become a relevant word of information systems and computing
In this article, the theoretical heat transfer of flexible multilayer insulation material which can be used in high (<433 K)
and low temperature (>123 K) environments has been analyzed. A mathematical model has been developed to describe the heat
flux through flexible multilayer insulation material, where the heat transfer consists of thermal radiation, solid spacers
and gas heat transfer. The equations for heat transfer model have been solved by iterative method combining with dichotomy
method using Matlab. Comparison between the experimental results and the calculated values which are obtained from the model
shows that the model is feasible to be applied in practical estimation. The investigation on the flexible multilayer thermal
insulation material will present active instruction to improve the performance and accomplish optimum design of the material.
ammonia chemisorption using a static adsorption apparatus. The sample was pre-evacuated (<10 −4 Torr) at 400 °C for 1 h, and the amount of adsorption was measured at 100–300 °C. Ammonia at 200 Torr was introduced and the pressure was measured every 15 min
Authors:Hagen Frickmann, Thomas Köller, Ralf Matthias Hagen, Klaus-Peter Ebert, Martin Müller, Werner Wenzel, Renate Gatzer, Ulrich Schotte, Alfred Binder, Romy Skusa, Philipp Warnke, Andreas Podbielski, Christian Rückert, and Bernd Kreikemeyer
obtained and included in the assessment.
After their transfer to Germany from Libya or Syria by StratAirMedEvac (strategic air medical evacuation, i.e., transport in specialized medical service airplanes of the German Air
Semiconductor particle detectors are ideal for alpha spectroscopy due to their compact size, low noise, and high resolution.
This paper describes the construction and testing of an automatic sample changer for use with such a detector. The changer
was constructed from locally available services and materials. It holds up to 24 samples of alpha emitting material deposited
on 22 mm stainless steel counting planchets. The vacuum chamber can be evacuated to less than 10 μm mercury in 10 to 15 minutes.
Once the chamber has been evacuated and detector bias has been applied, any sample in the chamber may be selected for analysis,
either automatically or manually. Continuous automatic analysis of up to 24 samples is possible. Variation in efficiency from
position to position was found to be 3.25% at the detector-sample spacing of 4.8 mm, and 2.31% at 27 mm. Shielding between
the adjacent samples not under analysis and the detector was acceptable.
Authors:K. Lázár, A. M.-Szeleczky, G. Vorbeck, R. Fricke, A. Vondrova, and J. Cejka
Ferrisilicates of MFI structure (HZSM-5) with Si/Fe ratios of 27.5, 35 and 67 have been studied by in situ Mössbauer spectroscopy, and the results are correlated with studies on catalytic conversions of toluene. Various species of iron ions are identified from 300 K spectra recorded after combinations of evacuation and reduction at 570 and 670 K, respectively. The roles of identified species are suggested in catalytic processes.
Authors:J. Michalik, J. Sadlo, T. Kodaira, S. Shimomura, and H. Yamada
Silver cationic clusters formed in γ-irradiated AgCs-rho zeolites in hydrated and dehydrated forms have been studied by electron
spin resonance (ESR) spectroscopy and diffuse reflectance spectrophotometry. It was found that tetrameric silver clusters,
in dehydrated zeolites and Ag
in hydrated samples, are stabilized at room temperature. Tetrameric silver is trapped inside octagonal prism of zeolite framework
and does not show any noticeable decay as far as samples are evacuated.