The Experts below are selected from a list of 87093 Experts worldwide ranked by ideXlab platform
Pearl Brereton - One of the best experts on this subject based on the ideXlab platform.
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prototype implementations of an Architectural Model for service based flexible software
Hawaii International Conference on System Sciences, 2002Co-Authors: K H Bennett, Malcolm Munro, P Layzell, Nicolas Gold, David Budgen, Nikolay Mehandjiev, Pearl BreretonAbstract:The need to change software easily to meet evolving business requirements is urgent, and a radical shift is required in the development of software, with a more demand-centric view leading to software which will be delivered as a service, within the framework of an open marketplace. We describe a service architecture and its rationale, in which components may be bound instantly, just at the time they are needed and then the binding may be disengaged. This allows highly flexible software services to be evolved in "Internet time". The paper focuses on early results: some of the aims have been demonstrated and amplified through two experimental implementations, enabling us to assess the strengths and weakness of the approach. It is concluded that some of the key underpinning concepts discovery and late binding - are viable and demonstrate the basic feasibility of the architecture.
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an Architectural Model for service based software with ultra rapid evolution
International Conference on Software Maintenance, 2001Co-Authors: K H Bennett, Malcolm Munro, P Layzell, Nicolas Gold, David Budgen, Pearl BreretonAbstract:There is an urgent industrial need for new approaches to software evolution that will lead to far faster implementation of software changes. For the past 40 years, the techniques, processes and methods of software development have been dominated by supply side issues, and as a result the software industry is oriented towards developers rather than users. Existing software maintenance processes are simply too slow to meet the needs of many businesses. To achieve the levels of functionality, flexibility and time to market of changes and updates required by users, a radical shift is required in the development of software, with a more demand-centric view leading to software which will be delivered as a service, within the framework of an open marketplace. Although there are some signs that this approach is being adopted by industry, it is in a very limited and restricted form. We summarise research that has resulted in a long term strategic view of software engineering innovation. Based on this foundation, we describe more recent work that has resulted in an innovative demand-led Model for the future of software. We describe a service architecture in which components may be bound instantly, just at the time they are needed and then the binding may be disengaged. Such ultra late binding requires that many non-functional attributes of the software are capable of automatic negotiation and resolution. Some of these attributes have been demonstrated and amplified through a prototype implementation based on existing and available technology.
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an Architectural Model for service based flexible software
Computer Software and Applications Conference, 2001Co-Authors: K H Bennett, Malcolm Munro, Zhuang Hong, P Layzell, Nicolas Gold, David Budgen, Pearl BreretonAbstract:The urgent need to change software easily to meet evolving business requirements requires a radical shift in the development of software, with a more demand-centric view leading to software which will be delivered as a service, within the framework of an open marketplace. We describe a service architecture and its rationale, in which components may be bound instantly, just at the time they are needed and then the binding may, be disengaged. This allows highly flexible software services to be evolved in "internet time". The paper focuses on early results: some of the aims have been demonstrated and amplified through an experimental implementation based on e-Speak, an existing and available technology. It is concluded that technology such as e-Speak provides a useful infrastructure that rapidly enabled us to demonstrate the basic operation and viability of our approach.
K H Bennett - One of the best experts on this subject based on the ideXlab platform.
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prototype implementations of an Architectural Model for service based flexible software
Hawaii International Conference on System Sciences, 2002Co-Authors: K H Bennett, Malcolm Munro, P Layzell, Nicolas Gold, David Budgen, Nikolay Mehandjiev, Pearl BreretonAbstract:The need to change software easily to meet evolving business requirements is urgent, and a radical shift is required in the development of software, with a more demand-centric view leading to software which will be delivered as a service, within the framework of an open marketplace. We describe a service architecture and its rationale, in which components may be bound instantly, just at the time they are needed and then the binding may be disengaged. This allows highly flexible software services to be evolved in "Internet time". The paper focuses on early results: some of the aims have been demonstrated and amplified through two experimental implementations, enabling us to assess the strengths and weakness of the approach. It is concluded that some of the key underpinning concepts discovery and late binding - are viable and demonstrate the basic feasibility of the architecture.
-
an Architectural Model for service based software with ultra rapid evolution
International Conference on Software Maintenance, 2001Co-Authors: K H Bennett, Malcolm Munro, P Layzell, Nicolas Gold, David Budgen, Pearl BreretonAbstract:There is an urgent industrial need for new approaches to software evolution that will lead to far faster implementation of software changes. For the past 40 years, the techniques, processes and methods of software development have been dominated by supply side issues, and as a result the software industry is oriented towards developers rather than users. Existing software maintenance processes are simply too slow to meet the needs of many businesses. To achieve the levels of functionality, flexibility and time to market of changes and updates required by users, a radical shift is required in the development of software, with a more demand-centric view leading to software which will be delivered as a service, within the framework of an open marketplace. Although there are some signs that this approach is being adopted by industry, it is in a very limited and restricted form. We summarise research that has resulted in a long term strategic view of software engineering innovation. Based on this foundation, we describe more recent work that has resulted in an innovative demand-led Model for the future of software. We describe a service architecture in which components may be bound instantly, just at the time they are needed and then the binding may be disengaged. Such ultra late binding requires that many non-functional attributes of the software are capable of automatic negotiation and resolution. Some of these attributes have been demonstrated and amplified through a prototype implementation based on existing and available technology.
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an Architectural Model for service based flexible software
Computer Software and Applications Conference, 2001Co-Authors: K H Bennett, Malcolm Munro, Zhuang Hong, P Layzell, Nicolas Gold, David Budgen, Pearl BreretonAbstract:The urgent need to change software easily to meet evolving business requirements requires a radical shift in the development of software, with a more demand-centric view leading to software which will be delivered as a service, within the framework of an open marketplace. We describe a service architecture and its rationale, in which components may be bound instantly, just at the time they are needed and then the binding may, be disengaged. This allows highly flexible software services to be evolved in "internet time". The paper focuses on early results: some of the aims have been demonstrated and amplified through an experimental implementation based on e-Speak, an existing and available technology. It is concluded that technology such as e-Speak provides a useful infrastructure that rapidly enabled us to demonstrate the basic operation and viability of our approach.
Bruno Andrieu - One of the best experts on this subject based on the ideXlab platform.
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Simulation of the effects of leaf bending dynamics on fungicide deposit on individual leaves of wheat using a 3D Architectural Model
2016Co-Authors: Christian Fournier, Bruno Andrieu, Sébastien Saint-jean, Anne Danthony, Benjamin Perriot, Mariem Abichou, Samuel Poidevin, Jessica Da Costa, Eric Cotteux, Corinne RobertAbstract:The upper leaves of wheat are the main sources of assimilate for grain production. As such, they are a specific target for fungicide treatments. The efficacy of a treatment can be assessed by the quantity of fungicide deposited on target leaves relative to the spraying application rate per unit area. For a given spraying system and under favorable meteorological conditions, foliar deposit depends on the individual areas and spatial arrangement of leaves within the canopy, which determine the interception of the spray; and on the physio-chemical characteristics of the product, which determine its fate on leaf surfaces. The objectives of this study are to Model the deposition of pesticide on the upper leaves of wheat and to identify the plant Architectural traits that influence the foliar deposit as the plant develops. For this we couple a 3D Architectural Model of wheat (ADEL-Wheat), which captures the dynamics of the spatial arrangement of individual leaves at different stages of plant development, with the projection algorithm of the Caribu light interception Model that allows estimating the deposit of fungicide within the canopy. A three-year experiment was performed (ECHAP project), with detailed assessments of plant architecture for three genotypes, and of tracer-deposit (tartrazine) on the four upper leaves, for two spraying dates. The Architectural measurements were used to calibrate the wheat Model that was tested against the foliar deposit data. We used the Model to further analyse the origin of the differences of deposit between leaves and between treatment dates observed in the experiments. The analyses reveal that the dynamics of leaf bending, assumed to be a function of leaf age, has a strong influence in spraying efficacy, especially for the upper two leaves. We therefore propose that optimal application strategy could be reasoned not only by considering the degree of expansion of targeted leaves, but also their dynamic of bending.
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An Architectural Model of spring wheat: Evaluation of the effects of population density and shading on Model parameterization and performance
Ecological Modelling, 2007Co-Authors: Jochem Evers, Christian Fournier, Bruno Andrieu, Michael Chelle, Jan Vos, Paul StruikAbstract:ADELwheat is an Architectural Model that describes development of wheat in 3D. This paper analyzes the robustness of the parameterization of ADELwheat for spring wheat cultivars in relation to plant population density and shading. The Model was evaluated using data from two spring wheat experiments with three plant population densities and two light regimes. Model validation was done at two levels of aggregation: (a) by comparing parameterization functions used as well as parameter values to the data (leaf and tiller appearance, leaf number, blade dimensions, sheath length, internode length) and (b) by comparing ground cover (GC) and leaf area index (LAI) of simulated virtual wheat plots with GC and LAI calculated from data. A sensitivity analysis was performed by modulating parameters defining leaf blade dimensions and leaf or tiller appearance rate. In contrast to population density, shading generally increased phyllochron and delayed tiller appearance. Both at the level of the organ and at the level of the canopy the Model performed satisfactorily. Parameterization functions in the Model that had been established previously applied to independent data for different conditions; GC and LAI were simulated adequately at three population densities. Sensitivity analysis revealed that calibration of phyllochron and blade area needs to be accurate to prevent disproportional deviations in output. The robustness of the Model parameterization and the simulation performance confirmed that the Model is a complete Architectural Model for aboveground development of spring wheat. It can be used in studies that require simulation of spring wheat structure, such as studies on plant–insect interaction, remote sensing, and light interception.
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towards a generic Architectural Model of tillering in gramineae as exemplified by spring wheat triticum aestivum
New Phytologist, 2005Co-Authors: Jochem B Evers, J Vos, Christian Fournier, Bruno Andrieu, Michael Chelle, P C StruikAbstract:Summary • This paper presents an Architectural Model of wheat (Triticum aestivum), designed to explain effects of light conditions at the individual leaf level on tillering kinetics. Various Model variables, including blade length and curvature, were parameterized for spring wheat, and compared with winter wheat and other Gramineae species. • The Architectural Model enables simulation of plant properties at the level of individual organs. Parameterization was based on data derived from an outdoor experiment with spring wheat cv. Minaret. • Final organ dimensions of tillers could be Modelled using the concept of relative phytomer numbers. Various variables in spring wheat showed marked similarities to winter wheat and other species, suggesting possibilities for a general Gramineae Architectural Model. • Our descriptive Model is suitable for our objective: investigating light effects on tiller behaviour. However, we plan to replace the descriptive Modelling solutions by physiological, mechanistic solutions, starting with the localized production and partitioning of assimilates as affected by abiotic growth factors.
Michael Chelle - One of the best experts on this subject based on the ideXlab platform.
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An Architectural Model of spring wheat: Evaluation of the effects of population density and shading on Model parameterization and performance
Ecological Modelling, 2007Co-Authors: Jochem Evers, Christian Fournier, Bruno Andrieu, Michael Chelle, Jan Vos, Paul StruikAbstract:ADELwheat is an Architectural Model that describes development of wheat in 3D. This paper analyzes the robustness of the parameterization of ADELwheat for spring wheat cultivars in relation to plant population density and shading. The Model was evaluated using data from two spring wheat experiments with three plant population densities and two light regimes. Model validation was done at two levels of aggregation: (a) by comparing parameterization functions used as well as parameter values to the data (leaf and tiller appearance, leaf number, blade dimensions, sheath length, internode length) and (b) by comparing ground cover (GC) and leaf area index (LAI) of simulated virtual wheat plots with GC and LAI calculated from data. A sensitivity analysis was performed by modulating parameters defining leaf blade dimensions and leaf or tiller appearance rate. In contrast to population density, shading generally increased phyllochron and delayed tiller appearance. Both at the level of the organ and at the level of the canopy the Model performed satisfactorily. Parameterization functions in the Model that had been established previously applied to independent data for different conditions; GC and LAI were simulated adequately at three population densities. Sensitivity analysis revealed that calibration of phyllochron and blade area needs to be accurate to prevent disproportional deviations in output. The robustness of the Model parameterization and the simulation performance confirmed that the Model is a complete Architectural Model for aboveground development of spring wheat. It can be used in studies that require simulation of spring wheat structure, such as studies on plant–insect interaction, remote sensing, and light interception.
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towards a generic Architectural Model of tillering in gramineae as exemplified by spring wheat triticum aestivum
New Phytologist, 2005Co-Authors: Jochem B Evers, J Vos, Christian Fournier, Bruno Andrieu, Michael Chelle, P C StruikAbstract:Summary • This paper presents an Architectural Model of wheat (Triticum aestivum), designed to explain effects of light conditions at the individual leaf level on tillering kinetics. Various Model variables, including blade length and curvature, were parameterized for spring wheat, and compared with winter wheat and other Gramineae species. • The Architectural Model enables simulation of plant properties at the level of individual organs. Parameterization was based on data derived from an outdoor experiment with spring wheat cv. Minaret. • Final organ dimensions of tillers could be Modelled using the concept of relative phytomer numbers. Various variables in spring wheat showed marked similarities to winter wheat and other species, suggesting possibilities for a general Gramineae Architectural Model. • Our descriptive Model is suitable for our objective: investigating light effects on tiller behaviour. However, we plan to replace the descriptive Modelling solutions by physiological, mechanistic solutions, starting with the localized production and partitioning of assimilates as affected by abiotic growth factors.
Christian Fournier - One of the best experts on this subject based on the ideXlab platform.
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Simulation of the effects of leaf bending dynamics on fungicide deposit on individual leaves of wheat using a 3D Architectural Model
2016Co-Authors: Christian Fournier, Bruno Andrieu, Sébastien Saint-jean, Anne Danthony, Benjamin Perriot, Mariem Abichou, Samuel Poidevin, Jessica Da Costa, Eric Cotteux, Corinne RobertAbstract:The upper leaves of wheat are the main sources of assimilate for grain production. As such, they are a specific target for fungicide treatments. The efficacy of a treatment can be assessed by the quantity of fungicide deposited on target leaves relative to the spraying application rate per unit area. For a given spraying system and under favorable meteorological conditions, foliar deposit depends on the individual areas and spatial arrangement of leaves within the canopy, which determine the interception of the spray; and on the physio-chemical characteristics of the product, which determine its fate on leaf surfaces. The objectives of this study are to Model the deposition of pesticide on the upper leaves of wheat and to identify the plant Architectural traits that influence the foliar deposit as the plant develops. For this we couple a 3D Architectural Model of wheat (ADEL-Wheat), which captures the dynamics of the spatial arrangement of individual leaves at different stages of plant development, with the projection algorithm of the Caribu light interception Model that allows estimating the deposit of fungicide within the canopy. A three-year experiment was performed (ECHAP project), with detailed assessments of plant architecture for three genotypes, and of tracer-deposit (tartrazine) on the four upper leaves, for two spraying dates. The Architectural measurements were used to calibrate the wheat Model that was tested against the foliar deposit data. We used the Model to further analyse the origin of the differences of deposit between leaves and between treatment dates observed in the experiments. The analyses reveal that the dynamics of leaf bending, assumed to be a function of leaf age, has a strong influence in spraying efficacy, especially for the upper two leaves. We therefore propose that optimal application strategy could be reasoned not only by considering the degree of expansion of targeted leaves, but also their dynamic of bending.
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An Architectural Model of spring wheat: Evaluation of the effects of population density and shading on Model parameterization and performance
Ecological Modelling, 2007Co-Authors: Jochem Evers, Christian Fournier, Bruno Andrieu, Michael Chelle, Jan Vos, Paul StruikAbstract:ADELwheat is an Architectural Model that describes development of wheat in 3D. This paper analyzes the robustness of the parameterization of ADELwheat for spring wheat cultivars in relation to plant population density and shading. The Model was evaluated using data from two spring wheat experiments with three plant population densities and two light regimes. Model validation was done at two levels of aggregation: (a) by comparing parameterization functions used as well as parameter values to the data (leaf and tiller appearance, leaf number, blade dimensions, sheath length, internode length) and (b) by comparing ground cover (GC) and leaf area index (LAI) of simulated virtual wheat plots with GC and LAI calculated from data. A sensitivity analysis was performed by modulating parameters defining leaf blade dimensions and leaf or tiller appearance rate. In contrast to population density, shading generally increased phyllochron and delayed tiller appearance. Both at the level of the organ and at the level of the canopy the Model performed satisfactorily. Parameterization functions in the Model that had been established previously applied to independent data for different conditions; GC and LAI were simulated adequately at three population densities. Sensitivity analysis revealed that calibration of phyllochron and blade area needs to be accurate to prevent disproportional deviations in output. The robustness of the Model parameterization and the simulation performance confirmed that the Model is a complete Architectural Model for aboveground development of spring wheat. It can be used in studies that require simulation of spring wheat structure, such as studies on plant–insect interaction, remote sensing, and light interception.
-
towards a generic Architectural Model of tillering in gramineae as exemplified by spring wheat triticum aestivum
New Phytologist, 2005Co-Authors: Jochem B Evers, J Vos, Christian Fournier, Bruno Andrieu, Michael Chelle, P C StruikAbstract:Summary • This paper presents an Architectural Model of wheat (Triticum aestivum), designed to explain effects of light conditions at the individual leaf level on tillering kinetics. Various Model variables, including blade length and curvature, were parameterized for spring wheat, and compared with winter wheat and other Gramineae species. • The Architectural Model enables simulation of plant properties at the level of individual organs. Parameterization was based on data derived from an outdoor experiment with spring wheat cv. Minaret. • Final organ dimensions of tillers could be Modelled using the concept of relative phytomer numbers. Various variables in spring wheat showed marked similarities to winter wheat and other species, suggesting possibilities for a general Gramineae Architectural Model. • Our descriptive Model is suitable for our objective: investigating light effects on tiller behaviour. However, we plan to replace the descriptive Modelling solutions by physiological, mechanistic solutions, starting with the localized production and partitioning of assimilates as affected by abiotic growth factors.
