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Displaying 1-33 out of 33 total
Traffic in the Smart City: Exploring City-Wide Sensing for Traffic Control Center Augmentation
Found in: IEEE Internet Computing
By Vassilis Kostakos,Timo Ojala,Tomi Juntunen
Issue Date:November 2013
pp. 22-29
Smart city technologies can provide substantial benefits that improve people's daily lives. Here, the authors investigate how ubiquitous traffic sensing technologies and techniques can be incorporated with conventional traffic control and monitoring practi...
 
Distributed Resource Discovery in the Machine-to-Machine Applications
Found in: 2013 IEEE 10th International Conference on Mobile Ad-Hoc and Sensor Systems (MASS)
By Meirong Liu,Teemu Leppanen,Erkki Harjula, Zhonghong Ou,Mika Ylianttila,Timo Ojala
Issue Date:October 2013
pp. 411-412
One challenging problem in Machine-to-Machine (M2M) applications is to efficiently discover the resources provided by a huge number of heterogeneous devices. This paper proposes distributed resource discovery architecture (DRD) for M2M applications. The DR...
 
Multipurpose Interactive Public Displays in the Wild: Three Years Later
Found in: Computer
By Timo Ojala,Vassilis Kostakos,Hannu Kukka,Tommi Heikkinen,Tomas Lindén,Marko Jurmu,Simo Hosio,Fabio Kruger,Daniele Zanni
Issue Date:May 2012
pp. 42-49
Extended research on interactive public displays deployed in a city center reveals differences between the public's stated information needs and their actual information behavior and highlights effects that an artificial environment cannot duplicate.
 
Experiences inside the Ubiquitous Oulu Smart City
Found in: Computer
By Felipe Gil-Castineira, Enrique Costa-Montenegro, Francisco J. Gonzalez-Castano, Cristina Lopez-Bravo, Timo Ojala, Raja Bose
Issue Date:June 2011
pp. 48-55
The UrBan Interactions (UBI) research program, coordinated by the University of Oulu, has created a middleware layer on top of the panOULU wireless network and opened it up to ubiquitous-computing researchers, offering opportunities to enhance and facilita...
 
UBI-Hotspot 1.0: Large-Scale Long-Term Deployment of Interactive Public Displays in a City Center
Found in: Internet and Web Applications and Services, International Conference on
By Timo Ojala, Hannu Kukka, Tomas Lindén, Tommi Heikkinen, Marko Jurmu, Simo Hosio, Fabio Kruger
Issue Date:May 2010
pp. 285-294
We present the design, implementation, deployment and evaluation of novel urban computing infrastructure called ‘UBI-hotspot’. It is effectively a large interactive public display embedded with other computing resources. We have deployed a network of UBI-h...
 
Open Urban Testbed for Ubiquitous Computing
Found in: Communications and Mobile Computing, International Conference on
By Timo Ojala
Issue Date:April 2010
pp. 442-447
This paper presents an open testbed for studying the utilization of pervasive computing infrastructure in a city center. It comprises of different types of wireless networks, large public displays, middleware resources and monitoring tools. A set of exampl...
 
BlueInfo: Open Architecture for Deploying Web Services in WPAN Hotspots
Found in: Web Services, IEEE International Conference on
By Hannu Kukka, Fabio Kruger, Timo Ojala
Issue Date:July 2009
pp. 984-991
We introduce BlueInfo, an open architecture for deploying web services in WPAN hotspots for cost-free context-aware mobile access over Bluetooth. A BlueInfo hotspot either pushes subscribed services at desired intervals to registered devices (BlueInfo Push...
 
Advancing Content-Based Retrieval Effectiveness with Cluster-Temporal Browsing in Multilingual Video Databases
Found in: Multimedia and Expo, IEEE International Conference on
By Mika Rautiainen, Tapio Seppanen, Timo Ojala
Issue Date:July 2006
pp. 377-380
Interactive experiments on video retrieval systems need to address the problem of internal validity, i.e. how much the test users' experience affects the retrieval effectiveness. This paper compares the semantic retrieval performance of novice users and ex...
 
mTag - Architecture for Discovering Location Specific Mobile Web Services Using RFID and Its Evaluation with Two Case Studies
Found in: Advanced International Conference on Telecommunications / Internet and Web Applications and Services, International Conference on
By Jani Korhonen, Timo Ojala, Mikko Klemola, Pasi Vaananen
Issue Date:February 2006
pp. 191
This paper introduces mTag, a distributed eventdriven architecture for discovering location specific mobile web services. Service discovery is initiated by touching a fixed RFID reader with a mobile passive RFID tag attached e.g. to a phone, which results ...
 
Empirical Evaluation of MPEG-7 XM Color Descriptors in Content-Based Retrieval of Semantic Image Categories
Found in: Pattern Recognition, International Conference on
By Timo Ojala, Markus Aittola, Esa Matinmikko
Issue Date:August 2002
pp. 21021
This paper conducts an empirical evaluation of MPEG-7 visual part of experimentation model (XM) color descriptors in a challenging problem of content-based retrieval of semantic image categories. The performance of the four color descriptors provided in th...
 
Outex - New Framework for Empirical Evaluation of Texture Analysis Algorithms
Found in: Pattern Recognition, International Conference on
By Timo Ojala, Topi Mäenpää, Matti Pietikäinen, Jaakko Viertola, Juha Kyllönen, Sami Huovinen
Issue Date:August 2002
pp. 10701
This paper presents the current status of a new initiative aimed at developing a versatile framework and image database for empirical evaluation of texture analysis algorithms. The proposed Outex framework contains a large collection of surface textures ca...
 
Multiresolution Gray-Scale and Rotation Invariant Texture Classification with Local Binary Patterns
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Timo Ojala, Matti Pietikäinen, Topi Mäenpää
Issue Date:July 2002
pp. 971-987
<p>This paper presents a theoretically very simple, yet efficient, multiresolution approach to gray-scale and rotation invariant texture classification based on local binary patterns and nonparametric discrimination of sample and prototype distributi...
 
Nonparametric Multichannel Texture Description with Simple Spatial Operators
Found in: Pattern Recognition, International Conference on
By Timo Ojala, Matti Pietikainen
Issue Date:August 1998
pp. 1052
No summary available.
 
Distributed resource directory architecture in Machine-to-Machine communications
Found in: 2013 IEEE 9th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)
By Meirong Liu,Teemu Leppanen,Erkki Harjula,Zhonghong Ou,Archana Ramalingam,Mika Ylianttila,Timo Ojala
Issue Date:October 2013
pp. 319-324
Machine-to-Machine (M2M) communications emerge to achieve ubiquitous communications among all the networked devices. One challenging problem in M2M applications is to discover the resources provided by the devices efficiently. This challenge arises from tw...
   
2nd International UBI Challenge 2013
Found in: Proceedings of the 12th International Conference on Mobile and Ubiquitous Multimedia (MUM '13)
By Timo Ojala
Issue Date:December 2013
pp. 1-4
This paper summarizes the 2nd UBI Challenge that invited the global R&D community to design, implement, deploy and evaluate novel applications and services in real world setting atop the open urban computing testbed in Oulu, Finland. The paper first re...
     
Interoperable mobile agents in heterogeneous wireless sensor networks
Found in: Proceedings of the 11th ACM Conference on Embedded Networked Sensor Systems (SenSys '13)
By Archana Ramalingam, Jukka Riekki, Kaoru Sezaki, Pauli Närhi, Teemu Leppänen, Timo Ojala, Erkki Harjula, Jani Ylioja, Jose Alvarez Lacasia, Meirong Liu, Yoshito Tobe
Issue Date:November 2013
pp. 1-2
We demonstrate interoperable mobile agents for language- and platform-independent wireless sensor network programming, with low-power resource-constrained embedded devices as static nodes and Android-based smartphones as mobile nodes, over disparate networ...
     
The UbiComp 2013 doctoral school
Found in: Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication (UbiComp '13 Adjunct)
By Elaine M. Huang, Timo Ojala
Issue Date:September 2013
pp. 315-318
Device-free passive (DfP) localization has been proposed as an emerging technique for localizing people, without requiring them to carry any devices. Potential applications include elder-care, security enforcement, building occupancy statistics, etc. We fi...
     
Gesture interaction for wall-sized touchscreen display
Found in: Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication (UbiComp '13 Adjunct)
By Guoying Zhao, Janne Heikkilä, Timo Ojala, Toni Alatalo, Xinyuan Huang, Yan Zhai
Issue Date:September 2013
pp. 175-178
In order to improve the user experience in a large touchscreen, this research introduces gesture interaction into wall-sized touchscreen. According to the distance between user and display, we create two interaction modes for touch and body gesture respect...
     
What makes you click: exploring visual signals to entice interaction on public displays
Found in: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '13)
By Hannu Kukka, Heidi Oja, Jorge Gonçalves, Timo Ojala, Vassilis Kostakos
Issue Date:April 2013
pp. 1699-1708
Most studies take for granted the critical first steps that prelude interaction with a public display: awareness of the interactive affordances of the display, and enticement to interact. In this paper we investigate mechanisms for enticing interaction on ...
     
Holistic energy consumption monitoring in buildings with IP-based wireless sensor networks
Found in: Proceedings of the Fourth ACM Workshop on Embedded Sensing Systems for Energy-Efficiency in Buildings (BuildSys '12)
By Jani Ylioja, Jukka Riekki, Pauli Närhi, Teemu Leppänen, Teijo Räty, Timo Ojala
Issue Date:November 2012
pp. 195-196
We present UBI-AMI v2 for holistic real-time monitoring of building energy consumption with two types of wireless sensors. A Mains sensor monitors the aggregate load at the root of the load tree and the individual loads of up to 30 circuit breakers using a...
     
Reflecting QoS of low-cost multi-provider municipal WiFi on commercial 3.G mobile data and ISM spectrum occupancy
Found in: Proceedings of the 10th ACM international symposium on Mobility management and wireless access (MobiWac '12)
By Jarkko Luukkonen, Joonas Kokkoniemi, Ossi Salmi, Paavo Pokkinen, Timo Ojala, Toni Hakanen
Issue Date:October 2012
pp. 37-44
We present two measurement campaigns reflecting the end-user QoS of a large municipal WiFi (IEEE 802.11 WLAN) network on the end-user QoS of three commercial 3.5G (HSPA) mobile data networks and on the spectrum occupancy of the 2.4 GHz ISM band. Our study ...
     
Towards multi-application public interactive displays
Found in: Proceedings of the 2012 International Symposium on Pervasive Displays (PerDis '12)
By Denzil Ferreira, Timo Ojala, Tomas Lindén, Tommi Heikkinen, Vassilis Kostakos
Issue Date:June 2012
pp. 1-5
Public displays are becoming a common sight in the urban landscape and they are increasingly being equipped with interaction components such as touch screens. In addition, the Web and its set of enabling technologies are attractive for realizing applicatio...
     
UBI challenge: research coopetition on real-world urban computing
Found in: Proceedings of the 10th International Conference on Mobile and Ubiquitous Multimedia (MUM '11)
By Timo Ojala, Vassilis Kostakos
Issue Date:December 2011
pp. 205-208
This paper introduces the UBI Challenge that challenged the global R&D community to design, implement, deploy and evaluate novel applications and services in real world setting atop an open urban computing testbed. The paper first provides a procedural...
     
panOULU: triple helix driven municipal wireless network providing open and free internet access
Found in: Proceedings of the 5th International Conference on Communities and Technologies (C&T '11)
By Ilari Heikkinen, Juhani Heikka, Jukka Orajarvi, Katriina Puhakka, Timo Ojala
Issue Date:June 2011
pp. 118-127
This paper describes the birth, evolution and current status of a unique wireless city network provided by a consortium of municipalities, public research and educational institutions, and industry. The relevance of the network is illustrated with statisti...
     
Enhancing interactive public displays with social networking services
Found in: Proceedings of the 9th International Conference on Mobile and Ubiquitous Multimedia (MUM '10)
By Hannu Kukka, Jukka Riekki, Marko Jurmu, Simo Hosio, Timo Ojala
Issue Date:December 2010
pp. 1-9
In this paper, we suggest utilizing modern social networking services for building versatile applications for interactive public displays. We demonstrate the functionality and potential of this approach by presenting a set of services deployed on top of a ...
     
UBI challenge workshop 2010: real world urban computing
Found in: Proceedings of the 12th ACM international conference adjunct papers on Ubiquitous computing - Adjunct (Ubicomp '10 Adjunct)
By Jukka Riekki, Timo Ojala
Issue Date:September 2010
pp. 535-538
This workshop promotes ubiquitous computing research in authentic urban setting, with real users and with sufficient scale and time span. We first motivate why such research is important and then describe our ongoing deployment of diverse computing resourc...
     
Supporting distributed private and public user interfaces in urban environments
Found in: Proceedings of the Eleventh Workshop on Mobile Computing Systems & Applications (HotMobile '10)
By Hannu Kukka, Jukka Riekki, Marko Jurmu, Simo Hosio, Timo Ojala
Issue Date:February 2010
pp. 25-30
Proliferation of large public displays in urban cityscape gives rise to applications distributed between public displays and mobile devices. However, real deployment of distributed applications on top of this new infrastructure is challenging as no commonl...
     
UbiRockMachine: a multimodal music voting service for shared urban spaces
Found in: Proceedings of the 8th International Conference on Mobile and Ubiquitous Multimedia (MUM '09)
By Hannu Kukka, Rodolfo Patino, Timo Ojala
Issue Date:November 2009
pp. 1-8
In this paper we suggest a conceptual architecture for music systems, designed to shift the control over a shared urban space to the users themselves, and also to encourage social interaction between co-located friends and strangers alike. We present UbiRo...
     
MobiSpray: mobile phone as virtual spray can for painting BIG anytime anywhere on anything
Found in: ACM SIGGRAPH 2009 Art Gallery (SIGGRAPH '09)
By Jurgen Scheible, Timo Ojala
Issue Date:August 2009
pp. 1-10
This paper presents MobiSpray, a novel interactive art tool for creating ubiquitous ephemeral digital art. The mobile phone is employed as a virtual spray can to spray dabs of digital paint onto the physical environment via large-scale projections. The ges...
     
MobiToss: a novel gesture based interface for creating and sharing mobile multimedia art on large public displays
Found in: Proceeding of the 16th ACM international conference on Multimedia (MM '08)
By Jurgen Scheible, Paul Coulton, Timo Ojala
Issue Date:October 2008
pp. 40-42
This paper presents MobiToss, a novel application for creating and sharing mobile multimedia art with an off-the-shelf mobile phone equipped with built-in accelerometer sensors allowing gesture control. The user first takes a photo or captures a video with...
     
MobiLenin combining a multi-track music video, personal mobile phones and a public display into multi-user interactive entertainment
Found in: Proceedings of the 13th annual ACM international conference on Multimedia (MULTIMEDIA '05)
By Jurgen Scheible, Timo Ojala
Issue Date:November 2005
pp. 199-208
This paper introduces a novel and creative approach for coupling multimedia art with a non-conventional distributed human-computer interface for multi-user interactive entertainment. The proposed MobiLenin system allows a group of people to interact simult...
     
Mobile kärpät: a case study in wireless personal area networking
Found in: Proceedings of the 3rd international conference on Mobile and ubiquitous multimedia (MUM '04)
By Jani Korhonen, Lauri Aalto, Pekka Parhi, Tiia Sutinen, Timo Ojala
Issue Date:October 2004
pp. 149-156
The advanced smartphones entering the mass market are capable of playing audio and video files back, which paves the way for new types of rich mobile multimedia services. However, these services impose high data rate requirements on the wireless link, whic...
     
SmartRestaurant: mobile payments in context-aware environment
Found in: Proceedings of the 6th international conference on Electronic commerce (ICEC '04)
By Jani Korhonen, Janne Lukkari, Timo Ojala
Issue Date:October 2004
pp. 575-582
Mobility, context-awareness and payment combined provide a customer with a completely new setting of consuming services at any time and any place. We introduce SmartRestaurant service, which allows customers to use mobile devices for ordering and paying lu...
     
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