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1

Digitale Medien

Exploring biophysical potential and sustainability of wheat cultivation in Uruguay at the national level (2000)

Mantel, S. ; Engelen, V.W.P. ; Molfino, J.H. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

Soil use and management 16 (2000), S. 0

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ISSN: 1475-2743

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft

Notizen: Abstract. A methodology is presented that explores soil survey information at the national level (1:1 M), generating sustainability indicators for wheat cultivation in Uruguay. Potential yields were calculated for simplified crop production situations under several constraints, such as limitation of water availability calculated from soil physical properties and climatic conditions, and limitation of nutrient availability calculated from soil fertility and climatic conditions. Land quality sufficiency was examined by comparing these yields with the constraint-free yield conditioned only by solar radiation, temperature and the crop's photosynthetic properties. Crop growth was simulated only for areas suitable for the defined agricultural use. Model runs were repeated with inclusion of a topsoil loss scenario over 20 years as defined from an erosion risk analysis. Comparison between crop growth simulations for the two situations, gives an indication of the changes in land quality status, which supplies an indicator for agroecological sustainability.On the basis of crop growth simulation it is concluded that wheat production constraints in Uruguay appear to be mainly related to water availability limitations, while nutrient availability is near optimal for the suitable soils. The simulated loss of topsoil impacts most on soil physical properties, expressed in reduced water-limited yields. Soil fertility status, evaluated by change in nutrient-limited yields, was little affected by the scenario.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1475-2743.2000.tb00208.x

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2

Digitale Medien

THE INFLUENCE OF BITE SIZE AND MULTIPLE BITES ON ORAL TEXTURE SENSATIONS (2003)

DE WIJK, RENÉ A. ; ENGELEN, LINA ; PRINZ, JON F. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

Journal of sensory studies 18 (2003), S. 0

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ISSN: 1745-459X

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: The influence of bite size on sensory mouthfeel and afterfeel sensations was explored in two studies in which single bites of vanilla custard desserts were varied from itollmL (study 1) and in which series of five bites of two different custard desserts were presented consecutively (study 2). In single bites, sensations of perceived creaminess were enhanced with size whereas sensations of astringency and temperature were suppressed. Bite size also affected perceived thickness, but the direction of the effects varied with custard desserts. With multiple bites, creaminess sensations continued to increase, whereas other sensations were unaffected. Switching to a second series of bites of another vanilla custard dessert showed larger sensory effects, especially on astringency sensations but also to a lesser extent on sensations of thickness and fatty afterfeel. Single and multiple bite results are discussed in terms of possible peripheral mechanisms. Switching results are discussed in terms of possible central sensory contrast mechanisms.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1745-459X.2003.tb00398.x

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3

Digitale Medien

Stimulating the Potential: Creative Performance and Communication in Innovation Teams (2004)

Kratzer, Jan ; Leenders, Oger Th. A. J. ; Engelen, Jo M. L. van

Oxford, UK and Malden, USA : Blackwell Publishing Ltd

Creativity and innovation management 13 (2004), S. 0

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ISSN: 1467-8691

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Wirtschaftswissenschaften

Notizen: Creativity is essential to successful new product development efforts. Teams constitute the organizing principle in most modern innovation activities. Although creativity research has revealed many factors influencing individual creativity, little is known about how team-level creativity is determined. Since the creative innovation task requires teams to combine and integrate input from multiple team members, the team's communication pattern is an important determinant of team creativity. Based on a sample of 44 NPD teams in eleven companies, this study examines the effects of team-member communication on team creativity. It is found that both interaction frequency and subgroup-formation of communication have a negative relationship to team creativity. Theoretical and practical implications are discussed, and further research is indicated.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1467-8691.2004.00294.x

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4

Digitale Medien

Predictive Analysis of Cocoa Procyanidins Using Near-Infrared Spectroscopy Techniques (2003)

WHITACRE, E. ; LIVER, J. O ; BROEK, R. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

Journal of food science 68 (2003), S. 0

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ISSN: 1750-3841

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: A near-infrared reflectance (NIR) spectroscopy technique for the prediction of procyanidins in cocoa beans (Theobroma cacao) has been developed. A select group of cocoa liquors from different origins used for the manufacture of chocolate were analyzed to determine quantitative levels of procyanidin oligomers (monomer to decamer) using normal-phase high-performance liquid chromatography. The calibration set included seasonal, environmental, and fermentation variations to cover the concentration range of procyanidins found at naturally occurring levels. The sample set was analyzed on FOSS NIR System II 6500 spectrophotometers and partial least-squares algorithms developed. Very good calibration statistics were obtained for the prediction of the total procyanidin oligomers (r2 = 0.983) with standard deviation/standard error of cross validation ratio (SD/SECV) of 5.68. A global version of this calibration, involving 20 Foss instruments produced a calibration r2 = 0.98 with a SD/ SECV = 6.20. Procyanidins have attracted increasing attention because of the rapidly growing body of evidence associating these compounds with a wide range of potential health benefits. A rapid method for the analysis of procyanidins in cocoa liquors would be beneficial in quality-control environments and would provide cost benefits to manufacturing operations.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1365-2621.2003.tb05779.x

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5

Digitale Medien

Quantitative analysis of bacterial communities from Mediterranean sapropels based on cultivation-dependent methods (2004)

Süß, Jacqueline ; Engelen, Bert ; Cypionka, Heribert ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

FEMS microbiology ecology 51 (2004), S. 0

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ISSN: 1574-6941

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Biologie

Notizen: Microbial communities of ancient Mediterranean sapropels, buried sediment layers of high organic matter, were analyzed by most probable number (MPN) approaches. Mineral media containing different carbon sources in sub-millimolar concentrations were used. MPN numbers were elevated in sapropels and at the sediment surface, which mirrored total cell count distributions. Highest MPN counts were obtained with a mixture of different monomeric and polymeric substrates, with amino acids or with long-chain fatty acids as sole carbon sources. These values reached up to 2 × 107 cm−3, representing 3.3% of the total cell count. A total of 98 pure cultures were isolated from the highest positive dilutions of the MPN series, representing the most abundant microorganisms culturable by the methods used. The strains were identified by molecular biological methods and could be grouped into 19 different phylotypes. They belonged to the α-, β-, γ-, and δ-Proteobacteria, to the Actinobacteria and the Firmicutes. However, about half of the number of isolates was closely related to the genera Photobacterium and Agrobacterium. Regarding the high cultivation success, these organisms can be assumed to be typical sapropel bacteria, representing a substantial part of the culturable indigenous microbial community.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1016/j.femsec.2004.07.010

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6

Digitale Medien

Challenges of the LHC: the detector challenge (2004)

Engelen, J.

Springer

The European physical journal 34 (2004), S. 61-65

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ISSN: 1434-6052

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1140/epjc/s2004-01768-6

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7

Digitale Medien

Supporting Timing Analysis by Automatic Bounding of Loop Iterations (2000)

Healy, Christopher ; Sjödin, Mikael ; Rustagi, Viresh ; [weitere]

Springer

Real-time systems 18 (2000), S. 129-156

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ISSN: 1573-1383

Schlagwort(e): hard real-time systems ; worst-case execution time ; static analysis

Quelle: Springer Online Journal Archives 1860-2000

Thema: Informatik

Notizen: Abstract Static timing analyzers, which are used to analyze real-time systems, need to know the minimum and maximum number of iterations associated with each loop in a real-time program so accurate timing predictions can be obtained. This paper describes three complementary methods to support timing analysis by bounding the number of loop iterations. First, an algorithm is presented that determines the minimum and maximum number of iterations of loops with multiple exits. Even when the number of iterations cannot be exactly determined, it is desirable to know the lower and upper iteration bounds. Second, when the number of iterations is dependent on unknown values of variables, the user is asked to provide bounds for these variables. These bounds are used to determine the minimum and maximum number of iterations. Specifying the values of variables is less error prone than specifying the number of loop iterations directly. Finally, a method is given to tightly predict the execution time of inner loops whose number of iterations is dependent on counter variables of outer level loops. This is accomplished by formulating the total number of iterations of a loop in terms of summations and solving the resulting equation. These three methods have been successfully integrated in an existing timing analyzer that predicts the performance for optimized code on a machine that exploits caching and pipelining. The result is tighter timing analysis predictions and less work for the user.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1008189014032

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