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 forestry information and communication system - Reports on forestry inventory and survey systems - Volume 1 - Country report for Belgium

Report (1997)

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 Kalivaç dam spillway (Albania)

Report (2008)

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

Poster (2008, May)

A Study on Observability and Sensor Selection for Efficient Jet Engine Health Monitoring

in Proceedings of ISROMAC-12 (2008, February)

Study on Real-time Evaluation of Slagging Propensities of Coals Based on Laser-induced Breakdown Spectroscopy

in Proceedings of the CSEE (2007), 27(23), 24-27

A method of real-time evaluation of slagging propensities of coals based on element quantitative technique by laser-induced breakdown spectroscopy Was introduced ．An experiment apparatus Was set up ... [more ▼]

A method of real-time evaluation of slagging propensities of coals based on element quantitative technique by laser-induced breakdown spectroscopy Was introduced ．An experiment apparatus Was set up according to the principle of analysis technique，an d in which six typical coals samples were analyzed．Four ones were used to construct calibration curves of the analyzed elements as a reference diagram determining the relation between element concentration an d spectral intensity， afterwards，analyzed silicon element an d aluminum element in other sampleswere surveyed with the reference diagram ．Ratios of silicon dioxide to aluminum trioxide were computed subsequently according to chemical calculation to evaluate the slagging propensities of coals．Comparing the evaluation with the computed result based on ash composition analyzed with conventional measure，the two match well．After all，some improvement program s to optimize the measurement mechanism were discussed． [less ▲]

Study on the effects of laminarin, a polysaccharide from seaweed, on gut characteristics

in Journal of the Science of Food and Agriculture (2007), 87(9), 1717-1725

This study investigates whether laminarin (beta 1-3,beta 1-6-glucan), a polysaccharide from seaweed, exhibits beneficial properties for human health by analysing its effects on intestinal parameters ... [more ▼]

This study investigates whether laminarin (beta 1-3,beta 1-6-glucan), a polysaccharide from seaweed, exhibits beneficial properties for human health by analysing its effects on intestinal parameters. Anaerobic batch culture fermenters were used for the screening of the in vitro utilization of laminarin by the human gut microflora through the monitoring of biochemical and microbiological parameters. Additionally, the influence of laminarin ingestion on the composition of intestinal mucus (neutral mucins, sialomucins and sulphomucins) was studied in rats. Laminarin was almost totally (more than 90% used) fermented after 24 h of incubation with human intestinal bacteria. It was not selectively used by bifidobacteria and lactobacilli, but increased the production of propionate and butyrate. Variations of mucus composition were observed in jejunum, ileum, caecum and colon, both in lumen content and in intestinal wall, of rats after ingestion of this polysaccharide. Due to its effects on mucus composition, laminarin could influence the adherence and the translocation of bacteria across the epithelial wall. In conclusion, laminarin seems to be a modulator of the intestinal metabolism by its effects on mucus composition, intestinal pH and short chain fatty acid (SCFA) production, especially butyrate. (c) 2007 Society of Chemical Industry. [less ▲]

Study on the production of a xylanolytic complex from Penicillium canescens 10.10c .

Poster (1996, May)