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595 results on '"Bollen M"'

102. Modelling abiotic site factors in response to atmospheric deposition and upward seepage

Author

Kros, J., Reinds, G.J., de Vries, W., Latour, J.B., and Bollen, M.

Subjects
Staring Centrum, Winand Staring Centre for Integrated Land, Soil and Water Research, Life Science
Abstract

Changes in vegetation are often caused by changes in abiotic site factors, such as pH, nitrogen availability and soil moisture. In order to evaluate the effects of eutrophication, acidification and drought on site factors, the SMART2 model has been developed. For the Netherlands, combinations of two acidification and two seepage scenarios (1990-2050) were evaluated with SMART2. Results showed that deposition reductions lead to a relatively fast improvement of the site factors, increase in pH and basesaturation, and decrease in nitrogen availability. A reduction in groundwater extractions by 25% has little or no effect on pH and nitrogen availability.

Published
1995

106. The reporting of distribution power quality surveys

Author

Gosbell, V. J., Baitch, Alex, Bollen, M. H., Gosbell, V. J., Baitch, Alex, and Bollen, M. H.

Abstract

Power quality surveys can contain a large amount of data for many sites and several utilities. A reporting format needs to be adopted which gives useful insights without sacrificing detail. It is recommended that a three level structure be adopted with site, network and utility component styles. The first of these is the presentation of the raw data in slightly abbreviated form while the second allows all sites in one network to be ranked according to severity of their power quality disturbances. Utility reporting allows comparison between the overall power quality performance of different utilities in benchmarking studies. Some new data analysis algorithms are proposed to show how the reporting styles should be implemented.

Published
2003

112. Working apart together : civiel militaire samenwerking tijdens humanitaire operaties

Author

Frerks, G.E., Soeters, J.M.L.M., Vogelaar, A.L.W., Bollen, M., Frerks, G.E., Soeters, J.M.L.M., Vogelaar, A.L.W., and Bollen, M.

Abstract

IntroductionThis study is about civil-military cooperation during humanitarian operations. It aims at explaining civil-military cooperation processes and at identifying ways in which collaboration may be improved. This book evaluates the experiences with civil-military relations by researching the following questions:What are conditions for civil-military cooperation during humanitarian operations?What are characteristics of civil-military alliances?What problems are impeding civilian actors and the military to cooperate?How can civil-military cooperation be improved?In this summary, the second section describes the background to the research. From the third section onwards the answers to the research questions are discussed.Background to this studyDuring the last decade of the 20th century, upsurges of intense animosity among many of the world's five to eight thousand ethnic groups have set the trend for violence. As a result, the number of complex humanitarian emergencies soared. From the mid-nineties onwards, the international community became increasingly aware that to deal with the consequences a wide spectrum of resources and a multi-faceted response was required. Amongst others, this brought forth new linkages between differing and non-traditional partners, such as civilian humanitarian organisations and international militaries who have been working together on humanitarian operations.Civil-military cooperation has become a characteristic of humanitarian operations in the nineties. However, in spite of positive results, civil-military cooperation during humanitarian operations has been controversial from the onset. The appropriateness of military contributions to humanitarian operations is questioned both from the military as well as from the civilian perspective.At a strategic level, civil and military actors acknowledge the vital importance of increased coordination and cooperation. Up until now, they appear to have adopted a mainly reactive attitude. As a

Published
2002

113. Characteristics of wind turbine generators for wind power plants

Author

Camm, E.H., primary, Behnke, M. R., additional, Bolado, O., additional, Bollen, M., additional, Bradt, M., additional, Brooks, C., additional, Dilling, W., additional, Edds, M., additional, Hejdak, W. J., additional, Houseman, D., additional, Klein, S., additional, Li, F., additional, Li, J., additional, Maibach, P., additional, Nicolai, T., additional, Patino, J., additional, Pasupulati, S. V., additional, Samaan, N., additional, Saylors, S., additional, Siebert, T., additional, Smith, T., additional, Starke, M., additional, and Walling, R., additional

Published
2009
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114. Wind power plant substation and collector system redundancy, reliability, and economics

Author

Camm, E.H., primary, Behnke, M. R., additional, Bolado, O., additional, Bollen, M., additional, Bradt, M., additional, Brooks, C., additional, Dilling, W., additional, Edds, M., additional, Hejdak, W. J., additional, Houseman, D., additional, Klein, S., additional, Li, F., additional, Li, J., additional, Maibach, P., additional, Nicolai, T., additional, Patino, J., additional, Pasupulati, S. V., additional, Samaan, N., additional, Saylors, S., additional, Siebert, T., additional, Smith, T., additional, Starke, M., additional, and Walling, R., additional

Published
2009
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115. Reactive power compensation for wind power plants

Author

Camm, E.H., primary, Behnke, M. R., additional, Bolado, O., additional, Bollen, M., additional, Bradt, M., additional, Brooks, C., additional, Dilling, W., additional, Edds, M., additional, Hejdak, W. J., additional, Houseman, D., additional, Klein, S., additional, Li, F., additional, Li, J., additional, Maibach, P., additional, Nicolai, T., additional, Patino, J., additional, Pasupulati, S. V., additional, Samaan, N., additional, Saylors, S., additional, Siebert, T., additional, Smith, T., additional, Starke, M., additional, and Walling, R., additional

Published
2009
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116. Wind power plant grounding, overvoltage protection, and insulation coordination: IEEE PES wind plant collector system design working group

Author

Camm, E.H., primary, Behnke, M. R., additional, Bolado, O., additional, Bollen, M., additional, Bradt, M., additional, Brooks, C., additional, Dilling, W., additional, Edds, M., additional, Hejdak, W. J., additional, Houseman, D., additional, Klein, S., additional, Li, F., additional, Li, J., additional, Maibach, P., additional, Nicolai, T., additional, Patino, J., additional, Pasupulati, S. V., additional, Samaan, N., additional, Saylors, S., additional, Siebert, T., additional, Smith, T., additional, Starke, M., additional, and Walling, R., additional

Published
2009
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149. Activation of hepatic acetyl-CoA carboxylase by glutamate and Mg2+ is mediated by protein phosphatase-2A.

Author

UCL - MD/BICL - Département de biochimie et de biologie cellulaire, Gaussin, V., Hue, Louis, Stalmans, W., Bollen, M., UCL - MD/BICL - Département de biochimie et de biologie cellulaire, Gaussin, V., Hue, Louis, Stalmans, W., and Bollen, M.

Abstract

The activation of hepatic acetyl-CoA carboxylase by Na(+)-cotransported amino acids such as glutamine has been attributed mainly to the stimulation of its dephosphorylation by accumulating dicarboxylic acids, e.g. glutamate. We report here on a hepatic species of protein phosphatase-2A that activates acetyl-CoA carboxylase in the presence of physiological concentrations of glutamate or Mg2+ and, under these conditions, accounts for virtually all the hepatic acetyl-CoA carboxylase phosphatase activity. Glutamate also stimulated the dephosphorylation of a synthetic pentadecapeptide encompassing the Ser-79 phosphorylation site of rat acetyl-CoA carboxylase, but did not affect the dephosphorylation of other substrates such as phosphorylase. Conversely, protamine, which stimulated the dephosphorylation of phosphorylase, inhibited the activation of acetyl-CoA carboxylase. A comparison with various species of muscle protein phosphatase-2A showed that the stimulatory effects of glutamate and Mg2+ on the acetyl-CoA carboxylase phosphatase activity are largely mediated by the regulatory A subunit. Glutamate and Mg2+ emerge from our study as novel regulators of protein phosphatase-2A when acting on acetyl-CoA carboxylase.

Published
1996

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