Jan Willem Streefkerk

TNO | tno · Expertise Group for Perceptual and Cognitive Systems

In reconnaissance operations, military observers are tasked to notice objects, people and events in their environment that may be relevant for their commander’s goals and objectives. Which ‘elements of information’ are noticed is influenced by how the operation assignment is presented (cf. the principle of priming). A distinction here is made betwe...

On future battlefields, increasingly more sensor information will become available for military commanders to support mission execution. To improve (shared) situational awareness, decision-making and communication in face of this increased amount of information, the design of command and control (C2) systems must match the mental models and informa...

In disaster recovery, responding professional organizations traditionally assess the needs of communities following a disaster. Recent disasters have shown that volunteer capacities within the community are not yet integrated in recovery activities. To improve the efficiency of responding professionals and utilize the potential capacity from within...

Military intelligence communities need to collect, process and disseminate information as quickly and efficiently as possible, for example in answering requests for information by commanders. Currently, the flow of information between the field and intelligence communities is hampered by disparities in the integration of the various components of t...

During military missions, mobile devices allow information exchange between distributed groups of soldiers. As the context of use changes frequently and more (unstructured) information becomes available during missions, the challenge is to ensure that the right information reaches the right recipients at the right moment. This paper presents the co...

Forensic professionals have to collect evidence at crime scenes quickly and without contamination. A handheld Augmented Reality (AR) annotation tool allows these users to virtually tag evidence traces at crime scenes and to review, share and export evidence lists. In an user walkthrough with this tool, eight end-users annotated a virtual crime scen...

Firefighters searching for victims work in hazardous environments with limited visibility, obstacles and uncertain navigation paths. In rescue tasks, extra sensor information from infrared cameras, indoor radar and gas sensors could improve vision, orientation and navigation. A visual and tactile interface concept is proposed that integrates this s...

In mobile computing, a fundamental problem is maintaining awareness of the environment and of information presented as messages on a mobile device. In mobile police patrols, officers need to pay attention to their direct environment and stay informed of incidents elsewhere. To prevent unwanted interruption, a context-aware notification system adapt...

In mobile computing, a fundamental problem is maintaining awareness of the environment and of information presented as messages on a mobile device. In mobile police patrol, officers need to pay attention to their direct environment and stay informed of incidents elsewhere. To prevent unwanted interruption, a context-aware notification system adapts...

Motivation -- To support group commanders of small tactical units in information exchange and decision making while in the field, a mobile system called Commanders Dashboard is developed. Research approach -- Based on a situated Cognitive Engineering (sCE) methodology, user requirements and claims for this decision support system are specified. A p...

Motivation -- Automated task allocation systems are prone to errors (e.g. incorrect advice) due to context events. Empirical assessment is needed of how the costs of incorrect task allocation advice relate to the benefits. Research approach -- Claims regarding benefits and costs are tested in a team surveillance task in a synthetic task environment...

To optimally distribute tasks within police teams during mobile surveillance, a context-aware task allocation system is designed and evaluated with end-users. This system selects and notifies appropriate team members of current incidents, based on context information (officer availability, officer proximity to the incident and incident priority) an...

Team awareness is important when asking team members for assistance, for example in the police domain. This paper investigates how presentation modality (visual or auditory) of relevant team information and communication influences team awareness and choice accuracy in a collaborative team task. An experimental prototype was created and implemented...

To increase police officer awareness of incident locations, the Dutch police developed and implemented a location-based notification system (LBNS). This mobile service notifies police officers proactively to warrants, agreements and police focal points in their current vicinity. To assess the accuracy, efficiency, effectiveness and user experience...

Map usage on handheld devices suffers from limited s creen size and the minimal attention that users can dedicate to them in mobile situations. This work examines effects of automating navigation features like zooming and panning as well as other features such as rotation, path finding and artifact representation on the mobile navigation experience...

To minimize unwanted interruption and information overload during surveillance, mobile police officers need to be supported by a mobile, context-aware notification system. This system adapts message presentation to message priority and context of use. A prototype is designed and evaluated in a simulated surveillance task, requiring users to attend...

In the mobile computing environment, there is a need to adapt the information and service provision to the momentary attentive state of the user, operational requirements and usage context. This paper proposes to design personal attentive user interfaces (PAUI) for which the content and style of information presentation is based on models of releva...

The Personal Assistant for onLine Services (PALS) project aims at attuning the interaction with mobile services to the momentary usage context. Among other thing, PALS should adequately address emotional states of the user and support users building up an adequate trust level during service interactions. In an experiment, participants performed int...

To attain optimal task performance for mobile workers, their navigation needs can be supported by handheld devices. Automating specific map manipulations such as zooming, panning and path visualizations, frees up users' limited memory and attention. This is especially necessary for mobile users in critical domains, such as security officers. Howeve...

The main argument in this thesis is that mobile technology has to adapt information presentation to the mobile use context and Human Factors (attention, workload and individual characteristics). This will provide better support for work in these domains than non-adaptive systems. We expect such context-aware mobile support (CAMS) systems to improve...