Study of VOC and odour emissions during the convective drying of urban residual sludges

Conference (2007, October)

Study of Wave Action on Floating Structures using Finite Elements Method. Comparison between Numerical and Experimental Results

in Proceedings of the Int. Symposium Brugge 5.7. May, 1982 (1982)

Study of ZnO sol-gel films: Effect of annealing

in Materials Letters (2010), 64(10), 1147-1149

Thin films of zinc oxide were deposited by spin coating method on different substrates. The obtained samples were thermally treated at temperatures from 400 degrees C up to 850 degrees C. The structural ... [more ▼]

Thin films of zinc oxide were deposited by spin coating method on different substrates. The obtained samples were thermally treated at temperatures from 400 degrees C up to 850 degrees C. The structural study was performed by XRD and FTIR techniques in order to observe the effect of the annealing temperatures. The sol-gel ZnO films showed polycrystalline hexagonal structure. The optical transmittance reached 91% and it diminished with increasing annealing temperatures. (C) 2010 Elsevier B.V. All rights reserved. [less ▲]

Study On Diverse Grafting Techniques For Their Capability In Rapid And Efficient Transmission Of Apple Proliferation Disease To Different Host Plants

in Bulletin of Insectology (2007), 60(2), 381-382

A study on engine health monitoring in the frequency domain

in Journal of Engineering for Gas Turbines & Power (2011), 133(08), 081604-1--081604-8

Most of the techniques developed to date for module performance analysis rely on steady-state measurements from a single operating point to evaluate the level of deterioration of an engine. One of the ... [more ▼]

Most of the techniques developed to date for module performance analysis rely on steady-state measurements from a single operating point to evaluate the level of deterioration of an engine. One of the major difficulties associated with this estimation problem comes from its underdetermined nature. It results from the fact that the number of health parameters exceeds the number of available sensors. Among the panel of remedies to this issue, a few authors have investigated the potential of using data collected during a transient operation of the engine. A major outcome of these studies is an improvement in the assessed health condition. The present study proposes a framework that formalizes this observation for a given class of input signals. The analysis is performed in the frequency domain, following the lines of system identification theory. More specifically, the mean-squared estimation error is shown to drastically decrease when using transient input signals. This study is conducted with an engine model representative of a commercial turbofan. [less ▲]

Study on environmental factors influencing the urea content of cow milk in Wallonia (Belgium)

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2010), 14

Study on environmental factors influencing the urea content of cow milk in Wallonia (Belgium). The urea content in tank milk is currently assessed in Wallonia (Belgium) for all milk producers by the ... [more ▼]

Study on environmental factors influencing the urea content of cow milk in Wallonia (Belgium). The urea content in tank milk is currently assessed in Wallonia (Belgium) for all milk producers by the Comite du lait. A statistical analysis was carried out on 5,675,758 data collected over the 2002-2008 period in order to study the variation in the urea content in milk from cows according to the months of the years and the agronomy areas. The data were analyzed with a linear model (proc GLM) including the fixed effects of the area, the month of sampling, the year and the interactions. The fat and proteins contents in milk were used as covariables. The average urea content in milk over the six years was 258 mg.l(-1). A proportion of 19% of the contents were over 350 mg.l(-1)and 10% over 400 mg.l(-1). The model explained 35% of the variation of the urea content. Within the model, the agronomy area was the most explicative component (44%). It was followed by the area-month interaction (18.6%), the protein content (17.8%) and the month (10.5%). The variation of the urea content in milk could be mainly explained by the differences in the diets offered to the lactating dairy cows according to the agronomy areas. The composition of the diets varies with the crops produced and therefore with the agronomy area. Higher urea contents were observed in areas with a lot of pastures (grazing areas) than in the arable areas. In the grazing areas, feedstuffs higher in protein than in energy are consumed by the cows: the excess of protein is probably the reason for the higher urea content. The feedstuffs produced in the arable areas are more various with more diversified and balanced diets. The season influenced also the urea content, a higher urea content being observed during the summer period as compared with the winter period. The changes could be explained by dietary differences between the indoor winter period and the grazing period in Summer. During the indoor period, the dairy cows are offered normally a complete diet which is more balanced than during the grazing period. [less ▲]

Study on european forest information and communication system. Country report for Belgium

in study on european forest information and communication system (1996, September 12)

Belgium is divided into 3 regions : Walloon, Flemish and Brussels regions. Each one has its own political autonomy in various fields, in particular the natural resources management. Wooded area in the ... [more ▼]

Belgium is divided into 3 regions : Walloon, Flemish and Brussels regions. Each one has its own political autonomy in various fields, in particular the natural resources management. Wooded area in the walloon region covers 530,600 ha. A first temporary inventory has been realised in the beginning of the 1980s. A new permanent forest inventory is carried out since the beginning of the 1994. The Flemish region will start the first permanent inventory of its 128,600 ha of wooded area in 1997. With only 2,000 ha the Brussels region does not organise a forest inventory up to now. The method used in the Walloon region is summarised below as the Flemish inventory method is quite similar. [less ▲]

Study on hydraulic scale model of the floods spillway of the Nakay dam (Nam Theun II project, Laos)

Report (2000)

Study on isoenzymes polymorphism in Lima bean (Phaseolus lunatus L.)

Poster (2003)

Study on mass transfer of isopropylbenzene and oxygen in a two-phase partitioning bioreactor in the presence of silicone oil.

in Applied Biochemistry and Biotechnology (2009), 153

A two-phase partitioning bioreactor (TPPB) to treat gas effluents polluted by volatile organic compound (VOC) has been developed. In this work, both the mass transfer of isopropylbenzene (IPB) and oxygen ... [more ▼]

A two-phase partitioning bioreactor (TPPB) to treat gas effluents polluted by volatile organic compound (VOC) has been developed. In this work, both the mass transfer of isopropylbenzene (IPB) and oxygen have been considered in relation to their influence on the hydrodynamics of the reactor and the type of silicone oils used as a second phase. The synergistic effect of silicone oil and stirrer speed on the global oxygen mass transfer coefficient (KLa) and gas-hold-up (up to 12%) have been investigated. The addition of 10% of low viscosity silicone oil (10 centistokes) in the reactor does not significantly affect the oxygen transfer rate. The very high solubility of IPB in the silicone oil leads to an enhancement of driving force term, especially for high fraction of silicone oil. However, it does not seem useful to exceed a volume fraction of 10% since KLaIPB decreases sharply at higher proportions of silicone oil. KLaIPB and KLa O2 evolve in the same way with the proportion of silicone oil. These results confirm the potentialities of our bioreactor to improve both the oxygen and pollutant gas transfer in the field of the treatment of gaseous pollutants, even for highly concentrated effluents. [less ▲]