Abstract: This contribution describes GESO, a tool to prepare a Google Earth visualization of the... more Abstract: This contribution describes GESO, a tool to prepare a Google Earth visualization of the Dutch land use scenarios as created by the Netherlands Environmental Assessment Agency. This Google Earth (GE) for the Sustainable Outlook tool, named GESO aims to be an effective, easy and low cost way to study Sustainable Outlook data via an interactive 3D visualization that integrates the land use icon and landscape feature approach as presented in the VisualScan study. The concept, implementation and usability of GESO are ...
In this paper we present the outline and usability of Google Earth visualization of Sustainable O... more In this paper we present the outline and usability of Google Earth visualization of Sustainable Outlook (GESO), a tool to prepare a multi-layered visualization of land use changes. The land use changes are the results future outlook studies of the Netherlands Environmental Assessment Agency. GESO aims an effective, easy and low cost way to study Sustainable Outlook data via an interactive 3D visualization that integrates the land use icon and landscape feature approach as presented in previous studies. The concept, ...
A longitudinal study on Anopheles mosquito larval abundance in distinct geographical and environm... more A longitudinal study on Anopheles mosquito larval abundance in distinct geographical and environmental settings in western Kenya
Constraints are important elements of every modelling process, but until now they have been treat... more Constraints are important elements of every modelling process, but until now they have been treated in an ad hoc manner, depending on the specific application domain and the capabilities of the tools used. In GIS and GeoVR applications, constraints are conditions which always have to be valid (true) within the model populated with real geographic object instances. This paper argues that constraints should form a systematic part of the object class definition, similar to other aspects of the definition, viz. attributes, methods and relationships. Also, the implementation of constraints in all GIS and GeoVR subsystems (at front-end, database and exchange (I/O) level) should be derived automatically from the constraints specified by the framework. The paper therefore puts forward a framework for modelling constraints comprising (1) a classification and clarification of constraints, (2) a formal description using the unified modelling language/object constraint language (UML/OCL) and (3...
Constraints are important elements of every modelling process, but until now they have been treat... more Constraints are important elements of every modelling process, but until now they have been treated in an ad hoc manner, depending on the specific application domain and the capabilities of the tools used. In GIS and GeoVR applications, constraints are conditions which always have to be valid (true) within the model populated with real geographic object instances. This paper argues that constraints should form a systematic part of the object class definition, similar to other aspects of the definition, viz. attributes, methods and relationships. Also, the implementation of constraints in all GIS and GeoVR subsystems (at front-end, database and exchange (I/O) level) should be derived automatically from the constraints specified by the framework. The paper therefore puts forward a framework for modelling constraints comprising (1) a classification and clarification of constraints, (2) a formal description using the unified modelling language/object constraint language (UML/OCL) and (3...
This study analyzes different ways of representing vaguely defined places from a set of sketch ma... more This study analyzes different ways of representing vaguely defined places from a set of sketch maps specifically when used in giving route instructions. A total of 30 participants who are familiar with the study area were asked to sketch a route map consisting of pre-identified set of places. The task involved two groups: intra-city route and inter-city route. Sketch maps were analyzed using a previously developed classification scheme to investigate how places with unclear spatial extent are represented. These were then classified into different category of places: district, site and neighborhood. Results showed that labels and regular shapes are the most preferred, as opposed to other types of sketch representations, regardless of the category of place. It also occurred that a specific place can be classified under one or more categories, which influences the type of sketch representation used.
Plantings, trees and shrubs, are the main materials to shape space in the landscape design proces... more Plantings, trees and shrubs, are the main materials to shape space in the landscape design process. These are challenging materials because of their living nature. Materials that show temporal changes during their lifetime (like changes of length, width and shape) and during annual seasons (like blossoming and fruitening periods and seasonal characteristics of deciduous trees). However like GAZVODA (2002) stated “All of the above facts about planting maps are so common to the landscape architect, that we usually do not consider them as any special products”. This is an interesting remark because in contrary to landscape ecology (BOLLINGER ET AL., 2006), designing forest management (BASKENT, 1996) and green maintenance (PINCETL, 2010) the temporal dimension of the design process seems of little interest according the results of literature research.
Journal of the American Mosquito Control Association
ABSTRACTThe detection of Aedes albopictus in Lucky bamboo (Dracaena sanderiana) greenhouses and A... more ABSTRACTThe detection of Aedes albopictus in Lucky bamboo (Dracaena sanderiana) greenhouses and Ae. atropalpus at used tire importers illustrates that the Netherlands is exposed to the risk of introductions of invasive mosquito species (IMS). In this study we implemented a risk-based and adaptive surveillance (2010–16) in order to detect introductions and prevent potential proliferation of IMS at these locations. Results at Lucky bamboo greenhouses show that interceptions of Ae. albopictus occurred every year, with 2010 and 2012 being the years with most locations found positive for this species (n = 6), and 2015 the year with the highest percentage of positive samples (4.1%). Furthermore, our results demonstrate that Ae. japonicus can also be associated with the import of Lucky bamboo. At used tire companies, IMS were found at 12 locations. Invasive mosquito species identified were Ae. albopictus, Ae. atropalpus, Ae. aegypti, and Ae. japonicus, of which Ae. albopictus has been foun...
Abstract To design effective strategies for sustainable urban resource management, it is essentia... more Abstract To design effective strategies for sustainable urban resource management, it is essential to understand which urban characteristics underlie consumption patterns. We used multiple linear regression analyses to examine sixteen factors on their explanatory power for spatial variation in residential electricity, gas and water consumption in Amsterdam. Four models per resource were used, based on distinct spatial units aggregating high-resolution data: neighbourhoods, districts, 100 m squares and 500 m squares. We found twelve explanatory variables for spatial variability in consumption in total and nine or ten per resource. The number and relative importance of explanatory variables varies with the spatial units used. Overall, neighbourhood models explain variance in consumption data best (adjusted R² = 0.88, 0.86, 0.74). Income level and building type stand out for having high relative importance (top 4) in all four models for two of the three resources; migration history shows an important correlation with water consumption, which was not described hitherto. We conclude that explanatory variables for resource consumption are sensitive to size and shape of spatial units used. We recommend to use future high resolution studies for different resources of interest to determine which spatial and temporal resolutions of analysis can support urban planners and designers in formulating context-specific interventions.
Background In the Netherlands, Aedes albopictus has been found each year since 2010 during routin... more Background In the Netherlands, Aedes albopictus has been found each year since 2010 during routine exotic mosquito species surveillance at companies that import used tires. We developed habitat suitability models to investigate the potential risk of establishment and spread of this invasive species at these locations. Methods We used two methodologies: first, a species distribution model based on the maximum entropy modelling approach (MaxEnt) taking into consideration updated occurrence data of the species in Europe, and secondly, a spatial logic conditional model based on the temperature requirements of the species and using land surface temperature data (LST model). Results Suitability assessment obtained with the MaxEnt model at European level accurately reflect the current distribution of the species and these results also depict moderately low values in parts of the Netherlands, Belgium, Denmark, the British islands and southern parts of Scandinavia. Winter temperature was the...
BackgroundIn the Netherlands, Aedes albopictus has been found each year since 2010 during routine... more BackgroundIn the Netherlands, Aedes albopictus has been found each year since 2010 during routine exotic mosquito species surveillance at companies that import used tires. We developed habitat suitability models to investigate the potential risk of establishment and spread of this invasive species at these locations. MethodsWe used two methodologies: first, a species distribution model based on the maximum entropy modelling approach (MaxEnt) taking into consideration updated occurrence data of the species in Europe, and second, a spatial logic conditional model based on the temperature requirements of the species and using Land Surface Temperature data (LST model). For model output comparison, we extracted the results of both models accordingly to the spatial extent of the Netherlands. ResultsResults obtained with the MaxEnt model at European level accurately reflect the observed current distribution of the species and also depicts moderately low values in parts of the Netherlands, ...
Abstract Agricultural extension in sub-Saharan Africa has often been criticised for its focus on ... more Abstract Agricultural extension in sub-Saharan Africa has often been criticised for its focus on linear knowledge transfer, and limited attention to systemic approaches to service delivery. Currently, the region is experiencing a new-ICT revolution and there are high expectations of new-ICTs to enhance interaction and information exchange in extension service delivery. Using an innovation systems perspective, we distinguish the roles demand-articulation, matching demand and supply, and innovation process management for innovation-intermediaries. The study explores literature on how new-ICT may support these roles, with specific interest in the possibilities of environmental monitoring and new forms of organisation enabled by enhanced connectivity. In order to contribute to the understanding of this area, the paper reports on a comparative study of two new-ICT platforms embedded in Ghanaian public and private extension organisations respectively. We assess the roles that these platforms (aim to) support, and document achievements and constraints based on interviews with extension staff and farmers. The findings indicate that while both platforms aim to support innovation-intermediation roles the focus areas and level of detail differ due to diverging organisational rationales to service delivery. In addition, we see that new-ICTs' potential to support innovation-intermediation roles is far from realised. This is not due to (new) ICTs lacking the capacity to link people in new ways and make information accessible, but due to the wider social, organisational and institutional factors that define the realisation of their potential. Therefore, more conventional modes of interaction around production advice and also credit provision continue to be dominant and better adapted to the situation. However, beyond the two platforms that were developed specifically by and for the extension organisations, there were indications that more informal and self-organised new-ICT initiatives can transform and enhance interaction patterns in innovations systems to achieve collective goals through standard virtual platforms such as WhatsApp and Telegram.
Abstract: This contribution describes GESO, a tool to prepare a Google Earth visualization of the... more Abstract: This contribution describes GESO, a tool to prepare a Google Earth visualization of the Dutch land use scenarios as created by the Netherlands Environmental Assessment Agency. This Google Earth (GE) for the Sustainable Outlook tool, named GESO aims to be an effective, easy and low cost way to study Sustainable Outlook data via an interactive 3D visualization that integrates the land use icon and landscape feature approach as presented in the VisualScan study. The concept, implementation and usability of GESO are ...
In this paper we present the outline and usability of Google Earth visualization of Sustainable O... more In this paper we present the outline and usability of Google Earth visualization of Sustainable Outlook (GESO), a tool to prepare a multi-layered visualization of land use changes. The land use changes are the results future outlook studies of the Netherlands Environmental Assessment Agency. GESO aims an effective, easy and low cost way to study Sustainable Outlook data via an interactive 3D visualization that integrates the land use icon and landscape feature approach as presented in previous studies. The concept, ...
A longitudinal study on Anopheles mosquito larval abundance in distinct geographical and environm... more A longitudinal study on Anopheles mosquito larval abundance in distinct geographical and environmental settings in western Kenya
Constraints are important elements of every modelling process, but until now they have been treat... more Constraints are important elements of every modelling process, but until now they have been treated in an ad hoc manner, depending on the specific application domain and the capabilities of the tools used. In GIS and GeoVR applications, constraints are conditions which always have to be valid (true) within the model populated with real geographic object instances. This paper argues that constraints should form a systematic part of the object class definition, similar to other aspects of the definition, viz. attributes, methods and relationships. Also, the implementation of constraints in all GIS and GeoVR subsystems (at front-end, database and exchange (I/O) level) should be derived automatically from the constraints specified by the framework. The paper therefore puts forward a framework for modelling constraints comprising (1) a classification and clarification of constraints, (2) a formal description using the unified modelling language/object constraint language (UML/OCL) and (3...
Constraints are important elements of every modelling process, but until now they have been treat... more Constraints are important elements of every modelling process, but until now they have been treated in an ad hoc manner, depending on the specific application domain and the capabilities of the tools used. In GIS and GeoVR applications, constraints are conditions which always have to be valid (true) within the model populated with real geographic object instances. This paper argues that constraints should form a systematic part of the object class definition, similar to other aspects of the definition, viz. attributes, methods and relationships. Also, the implementation of constraints in all GIS and GeoVR subsystems (at front-end, database and exchange (I/O) level) should be derived automatically from the constraints specified by the framework. The paper therefore puts forward a framework for modelling constraints comprising (1) a classification and clarification of constraints, (2) a formal description using the unified modelling language/object constraint language (UML/OCL) and (3...
This study analyzes different ways of representing vaguely defined places from a set of sketch ma... more This study analyzes different ways of representing vaguely defined places from a set of sketch maps specifically when used in giving route instructions. A total of 30 participants who are familiar with the study area were asked to sketch a route map consisting of pre-identified set of places. The task involved two groups: intra-city route and inter-city route. Sketch maps were analyzed using a previously developed classification scheme to investigate how places with unclear spatial extent are represented. These were then classified into different category of places: district, site and neighborhood. Results showed that labels and regular shapes are the most preferred, as opposed to other types of sketch representations, regardless of the category of place. It also occurred that a specific place can be classified under one or more categories, which influences the type of sketch representation used.
Plantings, trees and shrubs, are the main materials to shape space in the landscape design proces... more Plantings, trees and shrubs, are the main materials to shape space in the landscape design process. These are challenging materials because of their living nature. Materials that show temporal changes during their lifetime (like changes of length, width and shape) and during annual seasons (like blossoming and fruitening periods and seasonal characteristics of deciduous trees). However like GAZVODA (2002) stated “All of the above facts about planting maps are so common to the landscape architect, that we usually do not consider them as any special products”. This is an interesting remark because in contrary to landscape ecology (BOLLINGER ET AL., 2006), designing forest management (BASKENT, 1996) and green maintenance (PINCETL, 2010) the temporal dimension of the design process seems of little interest according the results of literature research.
Journal of the American Mosquito Control Association
ABSTRACTThe detection of Aedes albopictus in Lucky bamboo (Dracaena sanderiana) greenhouses and A... more ABSTRACTThe detection of Aedes albopictus in Lucky bamboo (Dracaena sanderiana) greenhouses and Ae. atropalpus at used tire importers illustrates that the Netherlands is exposed to the risk of introductions of invasive mosquito species (IMS). In this study we implemented a risk-based and adaptive surveillance (2010–16) in order to detect introductions and prevent potential proliferation of IMS at these locations. Results at Lucky bamboo greenhouses show that interceptions of Ae. albopictus occurred every year, with 2010 and 2012 being the years with most locations found positive for this species (n = 6), and 2015 the year with the highest percentage of positive samples (4.1%). Furthermore, our results demonstrate that Ae. japonicus can also be associated with the import of Lucky bamboo. At used tire companies, IMS were found at 12 locations. Invasive mosquito species identified were Ae. albopictus, Ae. atropalpus, Ae. aegypti, and Ae. japonicus, of which Ae. albopictus has been foun...
Abstract To design effective strategies for sustainable urban resource management, it is essentia... more Abstract To design effective strategies for sustainable urban resource management, it is essential to understand which urban characteristics underlie consumption patterns. We used multiple linear regression analyses to examine sixteen factors on their explanatory power for spatial variation in residential electricity, gas and water consumption in Amsterdam. Four models per resource were used, based on distinct spatial units aggregating high-resolution data: neighbourhoods, districts, 100 m squares and 500 m squares. We found twelve explanatory variables for spatial variability in consumption in total and nine or ten per resource. The number and relative importance of explanatory variables varies with the spatial units used. Overall, neighbourhood models explain variance in consumption data best (adjusted R² = 0.88, 0.86, 0.74). Income level and building type stand out for having high relative importance (top 4) in all four models for two of the three resources; migration history shows an important correlation with water consumption, which was not described hitherto. We conclude that explanatory variables for resource consumption are sensitive to size and shape of spatial units used. We recommend to use future high resolution studies for different resources of interest to determine which spatial and temporal resolutions of analysis can support urban planners and designers in formulating context-specific interventions.
Background In the Netherlands, Aedes albopictus has been found each year since 2010 during routin... more Background In the Netherlands, Aedes albopictus has been found each year since 2010 during routine exotic mosquito species surveillance at companies that import used tires. We developed habitat suitability models to investigate the potential risk of establishment and spread of this invasive species at these locations. Methods We used two methodologies: first, a species distribution model based on the maximum entropy modelling approach (MaxEnt) taking into consideration updated occurrence data of the species in Europe, and secondly, a spatial logic conditional model based on the temperature requirements of the species and using land surface temperature data (LST model). Results Suitability assessment obtained with the MaxEnt model at European level accurately reflect the current distribution of the species and these results also depict moderately low values in parts of the Netherlands, Belgium, Denmark, the British islands and southern parts of Scandinavia. Winter temperature was the...
BackgroundIn the Netherlands, Aedes albopictus has been found each year since 2010 during routine... more BackgroundIn the Netherlands, Aedes albopictus has been found each year since 2010 during routine exotic mosquito species surveillance at companies that import used tires. We developed habitat suitability models to investigate the potential risk of establishment and spread of this invasive species at these locations. MethodsWe used two methodologies: first, a species distribution model based on the maximum entropy modelling approach (MaxEnt) taking into consideration updated occurrence data of the species in Europe, and second, a spatial logic conditional model based on the temperature requirements of the species and using Land Surface Temperature data (LST model). For model output comparison, we extracted the results of both models accordingly to the spatial extent of the Netherlands. ResultsResults obtained with the MaxEnt model at European level accurately reflect the observed current distribution of the species and also depicts moderately low values in parts of the Netherlands, ...
Abstract Agricultural extension in sub-Saharan Africa has often been criticised for its focus on ... more Abstract Agricultural extension in sub-Saharan Africa has often been criticised for its focus on linear knowledge transfer, and limited attention to systemic approaches to service delivery. Currently, the region is experiencing a new-ICT revolution and there are high expectations of new-ICTs to enhance interaction and information exchange in extension service delivery. Using an innovation systems perspective, we distinguish the roles demand-articulation, matching demand and supply, and innovation process management for innovation-intermediaries. The study explores literature on how new-ICT may support these roles, with specific interest in the possibilities of environmental monitoring and new forms of organisation enabled by enhanced connectivity. In order to contribute to the understanding of this area, the paper reports on a comparative study of two new-ICT platforms embedded in Ghanaian public and private extension organisations respectively. We assess the roles that these platforms (aim to) support, and document achievements and constraints based on interviews with extension staff and farmers. The findings indicate that while both platforms aim to support innovation-intermediation roles the focus areas and level of detail differ due to diverging organisational rationales to service delivery. In addition, we see that new-ICTs' potential to support innovation-intermediation roles is far from realised. This is not due to (new) ICTs lacking the capacity to link people in new ways and make information accessible, but due to the wider social, organisational and institutional factors that define the realisation of their potential. Therefore, more conventional modes of interaction around production advice and also credit provision continue to be dominant and better adapted to the situation. However, beyond the two platforms that were developed specifically by and for the extension organisations, there were indications that more informal and self-organised new-ICT initiatives can transform and enhance interaction patterns in innovations systems to achieve collective goals through standard virtual platforms such as WhatsApp and Telegram.
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Papers by Ron Lammeren