Publications
Journal Articles | Conference Contributions | PhD Theses
Journal Articles
Julian Ohrt and Volker Turau. Cross-Platform Development Tools for Smartphone Applications. IEEE Computer, 45(9):72–79, September 2012.
@Article{Telematik_C-M_2012_SurveyOnXMTs,
author = {Julian Ohrt and Volker Turau},
title = {Cross-Platform Development Tools for Smartphone Applications},
pages = {72-79},
journal = {IEEE Computer},
volume = {45},
number = {9},
month = sep,
year = 2012,
}
Abstract:
Developers can use cross-platform mobile development tools to create smartphone apps that meet user expectations, but existing XMTs need improvement.
Conference Contributions
Julian Ohrt and Volker Turau. Building-Linked Location-Based Instantaneous Services System. In Proceedings of the 5th International Conference on Ambient Systems, Networks and Technologies (ANT2014), June 2014, pp. 445–452. Hasselt, Belgium.
Acceptance rate 36%.
@InProceedings{Telematik_Ohrt_2014_BLISS,
author = {Julian Ohrt and Volker Turau},
title = {Building-Linked Location-Based Instantaneous Services System},
booktitle = {Proceedings of the 5th International Conference on Ambient Systems, Networks and Technologies (ANT2014)},
pages = {445-452},
day = {4},
month = jun,
year = 2014,
location = {Hasselt, Belgium},
note = {Acceptance rate 36%},
}
Abstract:
For services which are meant to be used mainly inside buildings, a distribution using global app stores is inappropriate. Instead this work presents a provisioning system (BLISS) for building-linked location-based services. The multi-purpose application MultiApp implements the client-side of the BLISS specification. When a user enters a building, MultiApp instantaneously detects available services and allows to install and execute them. The client part of services is executed within the MultiApp environment and can provide functionalities similar to those offered by native applications. BLISS facilitates developing indoor location-based services by providing bi-directional communication between service providers and clients.
Julian Ohrt and Volker Turau. Simple Indoor Routing on SVG Maps. In Proceedings of the workshop Location-based services for Indoor Smart Environments (LISE'13) hosted at the 4th International Conference on Indoor Positioning and Indoor Navigation (IPIN'13), October 2013. Montbéliard, France.
@InProceedings{Telematik_Ohrt_2013_SvgMaps,
author = {Julian Ohrt and Volker Turau},
title = {Simple Indoor Routing on SVG Maps},
booktitle = {Proceedings of the workshop Location-based services for Indoor Smart Environments (LISE'13) hosted at the 4th International Conference on Indoor Positioning and Indoor Navigation (IPIN'13)},
day = {28},
month = oct,
year = 2013,
location = {Montbéliard, France},
}
Abstract:
Until now no general applicable technology for indoor localization has prevailed. As a result, there are many approaches to model buildings for indoor navigation being developed. Most of them are very expensive to apply. This work presents a tool for graphically adding navigational data to existing maps. It further demonstrates how to use the created map for routing as pure web application which can be combined with any positioning technology. As SVG is used as format for the map, it analyses performance of rendering and manipulating SVGs on different devices. We show that even large maps can be displayed on current mobile Android devices sufficiently fast for usage as indoor navigation application.
PhD Theses
Julian Christoph Ohrt. Seamless Integration of Location-Linked Services for Smartphones. PhD Thesis, Hamburg University of Technology, Hamburg, Germany, 2017.
@PhdThesis{Telematik_Ohrt_2017_Diss,
author = {Julian Christoph Ohrt},
title = {Seamless Integration of Location-Linked Services for Smartphones},
school = {Hamburg University of Technology},
address = {Hamburg, Germany},
year = 2017,
}
Abstract:
In this thesis a system called Building-Linked, Expeditious Services System (BLESS) is developed. It offers building-linked services which are usable without installation via an app store. As soon as a user enters a BLESS-equipped building, all usable services are automatically detected and presented. Services are filtered both by location of the user as well as his/her identity. A prototype of BLESS was implemented. Results of the field test are presented. They are further used to evaluate the system and to show potential for improvement.