B.A. van de Walle
Please Note
20 records found
1
Impact of Migration and Urbanization on Cities
An Agent-Based Model on the effects of Migration on the city of The Hague
Decision-making on pre-disaster evacuation strategies in danger of cyclone induced floods
Two case studies in Mozambique showing how to balance timeliness and uncertainty reduction in making shelter location decisions
Preventing Airborne Infectious Spreading
The role of airport level operations during epidemics
Information diffusion in complex emergencies
A model-based evaluation of information sharing strategies
The last airmile
Using inventory management and airport policies to reduce the constraints of bottlenecks on the airport relief chain
The timely delivery consists oftotal deliveyand theshare of priority demand delivered. The perfor-mance of the system as a whole can as such be evaluated, yet it lacks detail for the implementation ofpolicies. In order to improve the system, the bottlenecks had to be identified, for which the bottle-neck identification measures were introduced. These consist ofidle cargoandthroughput time. Theidle cargo is generally a notification for the occurrence of a bottleneck, with high average idle cargomeaning a bottleneck occurs. The throughput time here indicates whether it was very impacting,as high numbers for throughput time generally mean less impact on the overall component over time.The individual policies were ineffective to truly improve the airport relief chain as a whole. Severalpolicies proved to be quite effective at reducing bottlenecks, thus improving the timely delivery.However, only small improvements were seen in the total delivery, due to the downstream occur-rence of other bottlenecks. Theshare of priority demandalone could be raised effectively throughprioritization policy. Those policies would not provide further system improvements, making theiruse even more case specific.In order to improve on the timely delivery indicators, which includes the total delivery, combina-tions of inventory management policies and airport policies were examined. Based on the individualperformancesdestination prioritizationthrough use of off-airport storage anditem prioritizationon the most stressing relief type were chosen as the inventory management policies. These, if pairedwithadditional workerspolicies, were able to absolve the bottlenecks in the system up to the air-bridge. The combinations as such performed at the optimal range, considering the final constrainton the system and are preferable for implementation.The prioritization policies were the most useful, but require staff and their equipment to fullyperform. As such the processes in an airbridge system for the provision of relief items should con-sider the capacity at the regional airport and optimize the processes accordingly up to the airbridgeitself. ...
The timely delivery consists oftotal deliveyand theshare of priority demand delivered. The perfor-mance of the system as a whole can as such be evaluated, yet it lacks detail for the implementation ofpolicies. In order to improve the system, the bottlenecks had to be identified, for which the bottle-neck identification measures were introduced. These consist ofidle cargoandthroughput time. Theidle cargo is generally a notification for the occurrence of a bottleneck, with high average idle cargomeaning a bottleneck occurs. The throughput time here indicates whether it was very impacting,as high numbers for throughput time generally mean less impact on the overall component over time.The individual policies were ineffective to truly improve the airport relief chain as a whole. Severalpolicies proved to be quite effective at reducing bottlenecks, thus improving the timely delivery.However, only small improvements were seen in the total delivery, due to the downstream occur-rence of other bottlenecks. Theshare of priority demandalone could be raised effectively throughprioritization policy. Those policies would not provide further system improvements, making theiruse even more case specific.In order to improve on the timely delivery indicators, which includes the total delivery, combina-tions of inventory management policies and airport policies were examined. Based on the individualperformancesdestination prioritizationthrough use of off-airport storage anditem prioritizationon the most stressing relief type were chosen as the inventory management policies. These, if pairedwithadditional workerspolicies, were able to absolve the bottlenecks in the system up to the air-bridge. The combinations as such performed at the optimal range, considering the final constrainton the system and are preferable for implementation.The prioritization policies were the most useful, but require staff and their equipment to fullyperform. As such the processes in an airbridge system for the provision of relief items should con-sider the capacity at the regional airport and optimize the processes accordingly up to the airbridgeitself.
Institutional Change through Social Learning
Climate Change Policy Gaming in Kenya
Social learning (SL) has been proposed to facilitate institutional change. SL is a change in societal understanding, achieved through social interactions, which eventually gets situated within broader social networks. In principle, SL holds a promise in addressing the problem of routinised, non-adaptive institutions. Nevertheless, there is limited evidence on whether SL does indeed lead to institutional change.
This PhD research uses policy gaming to assess whether SL can lead to institutional change in the Nzoia River Basin. The results indicate that SL has the potential to change routine-based institutions and generate adaptive capacity. The outcomes also indicate the need for the following profound institutional changes in Nzoia River Basin:
Artefacts: Replace current WRM structures with configurations that respect the river, and support the sustainable management of the drainage basin, as a whole.
Values: Value water more than spatial, agricultural and energy-production plans and make water the structuring element within the Nzoia River Basin. This means that any proposed laws, regulations, practices and norms that intend to utilise the scarce water resources unsustainably should not be supported.
Underlying Assumptions: Question underlying assumptions, and make transformations to existing laws, regulations, values, norms and actor-networks to build adaptive capacity. ...
Social learning (SL) has been proposed to facilitate institutional change. SL is a change in societal understanding, achieved through social interactions, which eventually gets situated within broader social networks. In principle, SL holds a promise in addressing the problem of routinised, non-adaptive institutions. Nevertheless, there is limited evidence on whether SL does indeed lead to institutional change.
This PhD research uses policy gaming to assess whether SL can lead to institutional change in the Nzoia River Basin. The results indicate that SL has the potential to change routine-based institutions and generate adaptive capacity. The outcomes also indicate the need for the following profound institutional changes in Nzoia River Basin:
Artefacts: Replace current WRM structures with configurations that respect the river, and support the sustainable management of the drainage basin, as a whole.
Values: Value water more than spatial, agricultural and energy-production plans and make water the structuring element within the Nzoia River Basin. This means that any proposed laws, regulations, practices and norms that intend to utilise the scarce water resources unsustainably should not be supported.
Underlying Assumptions: Question underlying assumptions, and make transformations to existing laws, regulations, values, norms and actor-networks to build adaptive capacity.
Deep Uncertainty in Humanitarian Logistics
Simulation and Analysis of the Interplay between Decisions and Uncertainty for Post-Disaster Facility Location Decisions
Bridging the Gap between Planning & Implementation in Strategic Delta Planning
Structuring Implementation Programming
In this research, an attempt is made to structure the process of implementation by proposing a frmaework to keep track of the implementation process, as the project moves forward. The framework is then operationalized for a province in the Mekong Delta of Vietnam, where the developments are studied and compared with the strategic objectives of the region. ...
In this research, an attempt is made to structure the process of implementation by proposing a frmaework to keep track of the implementation process, as the project moves forward. The framework is then operationalized for a province in the Mekong Delta of Vietnam, where the developments are studied and compared with the strategic objectives of the region.
Resilient airports
Using a new resilience measuring approach to evaluate policies that improve the resilience of airports in the immediate post-disaster response
To compare the effect of the policies on the level of resilience of the system, this study proposes a new resilient measurement approach that incorporates the bounce back and bounce up capacity of a system. This approach divides resilience into three aspects (1) absorption capacity, (2) adaptive capacity and (3) recovery time. This resilience measurement approach can be used when a system has the following two characteristics: (1) dynamic required service levels over time and (2) internal system changes. ...
To compare the effect of the policies on the level of resilience of the system, this study proposes a new resilient measurement approach that incorporates the bounce back and bounce up capacity of a system. This approach divides resilience into three aspects (1) absorption capacity, (2) adaptive capacity and (3) recovery time. This resilience measurement approach can be used when a system has the following two characteristics: (1) dynamic required service levels over time and (2) internal system changes.
Modelling Humanitarian Interaction
Exploring the factors that determine humanitarian interaction and the policies that influence them through agent-based modelling. The case of information security.
chain of actions – from early warning systems to evaluation – information
determines priorities, resource allocation, and donors’ willingness to donate.
However, the potential harm that comes with data is often overlooked. Inadequate
data management increases the potential of data to harm the same people
humanitarians are trying to help. The goal of the presented research is to identify
the characteristics and mechanisms that influence humanitarian interaction,
with the aim to find those mechanisms that can influence humanitarians towards
better information security. The most influential characteristics are analysed in
order to determine what is likely to increase information security sector-wide. ...
chain of actions – from early warning systems to evaluation – information
determines priorities, resource allocation, and donors’ willingness to donate.
However, the potential harm that comes with data is often overlooked. Inadequate
data management increases the potential of data to harm the same people
humanitarians are trying to help. The goal of the presented research is to identify
the characteristics and mechanisms that influence humanitarian interaction,
with the aim to find those mechanisms that can influence humanitarians towards
better information security. The most influential characteristics are analysed in
order to determine what is likely to increase information security sector-wide.
Self-Sovereign Identities for Scaling Up Cash Transfer Projects
Designing a blockchain based digital identity system
Complication: Most identity systems are centralized and produce analogue proofs of identity such as passports or ID cards. These systems are susceptible to privacy and data breaches. Centralization leads to single-points-of-failure and could lead to fraudulent behavior resulting in people lacking formal proofs of identity. In general there is limited interoperability between identity systems and limited collaboration between the owners of these systems.
Approach: To create an interoperable and shared digital identity system using a Design Science Research strategy and systems engineering approach. This system must be distributed, protect privacy and put the identity owner in control of his or her data. The foundation of the system consists of Humanitarian Information Management principles, Privacy-by-Design principles and Self-Sovereign Identity principles. This research creates a functional blockchain based system, that enables identities for the use-case of Cash Transfer Programs.
Results: We present a validated set of ten design decisions that represent the trade-offs that have been made and prescribe a blueprint for a technical design.
Next steps:Future research should be done on how such a system could be implemented and used. This would require a process design approach that has to be developed, Also, elaborate research into user experience and user interfaces should be conducted. ...
Complication: Most identity systems are centralized and produce analogue proofs of identity such as passports or ID cards. These systems are susceptible to privacy and data breaches. Centralization leads to single-points-of-failure and could lead to fraudulent behavior resulting in people lacking formal proofs of identity. In general there is limited interoperability between identity systems and limited collaboration between the owners of these systems.
Approach: To create an interoperable and shared digital identity system using a Design Science Research strategy and systems engineering approach. This system must be distributed, protect privacy and put the identity owner in control of his or her data. The foundation of the system consists of Humanitarian Information Management principles, Privacy-by-Design principles and Self-Sovereign Identity principles. This research creates a functional blockchain based system, that enables identities for the use-case of Cash Transfer Programs.
Results: We present a validated set of ten design decisions that represent the trade-offs that have been made and prescribe a blueprint for a technical design.
Next steps:Future research should be done on how such a system could be implemented and used. This would require a process design approach that has to be developed, Also, elaborate research into user experience and user interfaces should be conducted.
Information-sharing in humanitarian operations in complex disasters
Using Agent-Based modelling to identify policies for improved performance
Understanding inter-organizational information sharing
A case-study in the context of Risk and Opportunity Based Asset Management for Critical Infrastructures (ROBAMCI)
Towards a Governance Structure for the Data-Driven Prioritization of Humanitarian Aid
A data ecosystem approach
Multi-Level Energy Focused Integration of Sectors For Rural Development
An Indian Context