Browsing Institutt for datateknologi og informatikk by Author "Ahlers, Dirk"
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A Measurement-Driven Approach to Understand Urban Greenhouse Gas Emissions in Nordic Cities
Ahlers, Dirk; Driscoll, Patric Arthur; Kraemer, Frank Alexander; Anthonisen, Fredrik Valde; Krogstie, John (Journal article, 2016)Cities are main drivers for climate change mitigation and emission reduction today. However, in many cases they lack reliable baselines of emissions to validate current developments over time, assess the impact of their ... -
A Smart City Ecosystem Enabling Open Innovation
Ahlers, Dirk; Wienhofen, Leendert Wilhelmus Marinus; Petersen, Sobah Abbas; Anvaari, Mohsen (Chapter, 2019)In this position paper we present IT-centered challenges that lie in designing an architecture for a flexible, open, transferable, and replicable smart city ecosystem spanning a plethora of suppliers and systems. The ... -
Analysis and Visualization of Urban Emission Measurements in Smart Cities
Ahlers, Dirk; Kraemer, Frank Alexander; Bråten, Anders Eivind; Liu, Xiufeng; Anthonisen, Fredrik Valde; Driscoll, Patrick Arthur; Krogstie, John (Chapter, 2018)Cities worldwide aim to reduce their greenhouse gas emissions and improve air quality for their citizens. Therefore, there is a need to implement smart city approaches to monitor, model, and understand local emissions to ... -
API deployment for big data management towards sustainable energy prosumption in smart cities-a layered architecture perspective
Bokolo, Anthony Junior; Petersen, Sobah Abbas; Ahlers, Dirk; Krogstie, John (Journal article; Peer reviewed, 2019)The smart city has emerged as a universal term for the pervasive utilisation of information and communication technologies deployed to provide value-added services to citizens based on data generated from sectors such as ... -
Applying Geographic Information Retrieval — An Experience Report on Developing Local Search for a Developing Country
Ahlers, Dirk (Journal article; Peer reviewed, 2014)This article reports on the efforts to establish a research project on a geospatial search engine for the Latin American country of Honduras during the author’s research stay at a local university. Honduras is an interesting ... -
Assessment of the Accuracy of GeoNames Gazetteer Data
Ahlers, Dirk (Chapter, 2013)Gazetteers are the basis of many geospatial applications and serve an important role to collect and make available knowledge about the physical world such as place names and their coordinates. GeoNames is one of the largest ... -
Big Data Driven Multi-Tier Architecture for Electric Mobility as a Service in Smart Cities: A Design Science Approach
Bokolo, Anthony Junior; Petersen, Sobah Abbas; Ahlers, Dirk; Krogstie, John (Peer reviewed; Journal article, 2020)Electric mobility as a service (eMaaS) is suggested as a possible solution to ease transportation and lessen environmental issues by providing a collaborative transport sharing infrastructure that is based on electric ... -
Big data driven multi-tier architecture for electric mobility as a service in smart cities: A design science approach
Bokolo, Anthony Junior; Petersen, Sobah Abbas; Ahlers, Dirk; Krogstie, John (Peer reviewed; Journal article, 2020)Purpose Electric mobility as a service (eMaaS) is suggested as a possible solution to ease transportation and lessen environmental issues by providing a collaborative transport sharing infrastructure that is based on ... -
Big data-oriented energy prosumption service in smart community districts: a multi-case study perspective
Bokolo, Anthony Junior; Petersen, Sobah Abbas; Ahlers, Dirk; Krogstie, John; Livik, Klaus (Journal article; Peer reviewed, 2019)The smart grid achieves bidirectional information and energy flow between energy consumer and utility grid, aiding energy users not only to utilize energy, but also to produce, sell, and share energy with other consumers ... -
Challenges for Information Access in Multi-Disciplinary Product Design and Engineering Settings
Ahlers, Dirk; Mehrpoor, Mahsa; Kristensen, Kjetil; Krogstie, John (Chapter, 2015)In any larger engineering setting, there is a huge number of documents that engineers and others need to use and be aware of in their daily work. To improve the handling of this amount of documents, we propose to view it ... -
A Cost Model for Data Discovery in Large-Scale IoT Networks of Smart Cities
Soltvedt, Torbjørn Kirkevik; Sinaeepourfard, Amir; Ahlers, Dirk (Chapter, 2020)A smart city with huge numbers of physical (e.g., sensors and actuators) and non-physical (e.g., external databases) data sources will continuously produce high amounts of massive city-data. Distributed data storage across ... -
D2C-SM: Designing a Distributed-to-Centralized Software Management Architecture for Smart Cities
Sinaeepourfard, Amir; Petersen, Sobah Abbas; Ahlers, Dirk (Peer reviewed; Journal article, 2019)Smart city innovations can enhance the quality of citizens’ life through different smart technology management solutions, including resource management, data management, and software management. Nowadays, there are two ... -
Document and Corpus Quality Challenges for Knowledge Management in Engineering Enterprises
Ahlers, Dirk; Krogstie, John (Journal article; Peer reviewed, 2015-10) -
Ducky: An Online Engagement Platform for Climate Communication
Glogovac, Bogdan; Simonsen, Mads; Solberg, Silje Strøm; Löfström, Erica; Ahlers, Dirk (Chapter, 2016)Climate change is an important area of concern today. Yet it is often difficult for individuals to estimate their own climate footprint and to understand their personal climate impact. However, an activity tracking approach ... -
Everything is Filed under 'File' — Conceptual Challenges in Applying Semantic Search to Network Shares for Collaborative Work
Ahlers, Dirk; Mehrpoor, Mahsa (Chapter, 2015) -
Expanding the utility of geospatial knowledge bases by linking concepts to WikiText and to polygonal boundaries
Martins, Bruno; López-Pellicer, Francisco J.; Ahlers, Dirk (Chapter, 2015)This vision paper argues that a geospatial knowledge base combining textual descriptions for concepts such as places, together with place types, semantic relations between concepts and, most importantly, polygonal geometries ... -
F2c2C-DM: A Fog-to-cloudlet-to-Cloud Data Management Architecture in Smart City
Sinaeepourfard, Amir; Krogstie, John; Petersen, Sobah Abbas; Ahlers, Dirk (Chapter, 2019)Smart city solutions make a high-level technological innovation in a city to expand their citizens' quality of life by several different technological management strategies (such as resource management and data management) ... -
Granularity as a qualitative concept for GIR
Ahlers, Dirk (Chapter, 2015)We examine the notion of granularity for qualitative thinking about geospatial data and location references. Granularity can be understood as an abstraction of level of detail or spatial resolution. Pure coordinates, which ... -
Harnessing Mobility Data in Cities: A Case Study from the Bergen Region
Ahlers, Dirk; Akerkar, Rajendra Arvind; Krogstie, John; Opdahl, Andreas Lothe; Tessem, Bjørnar; Zhang, Weiqing (Journal article; Peer reviewed, 2018)Smart cities attempt to use big data, machine learning, and other topical information and communication techniques (ICTs) to improve energy-consumption, mobility, waste management, and other crucial city functions. Many ... -
Interactive Exploration of Geographic Regions with Web-based Keyword Distributions
Ahlers, Dirk; Kumar, Chandan (Peer reviewed; Journal article, 2013)The most common and visible use of geographic information retrieval (GIR) today is the search for specific points of interest that serve an information need for places to visit. However, in some planning and decision making ...