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University of Oulu
(47 results)-
White Papers
Feasibility Evaluation of Context Distribution in Mobile Environment
March 18, 2009, 12:00am PDT
Although mobile devices are rich sources of context information, the distribution of context in mobile environments is often hindered by the limited battery life, and wireless connections with low...
Provided by University of Oulu
-
White Papers
Suitability of DHT-Based Peer-to-Peer Session Initiation Protocol for Wireless Distributed Services
July 19, 2009, 12:00am PDT
Providing both analytical and empirical results, it analyzes the suitability of Distributed Hash Tables (DHT)-based Peer-to-Peer Session Initiation Protocol (P2PSIP) overlay networking as a...
Provided by University of Oulu
-
White Papers
On-Line Process Management of Pavement Laying Using Wireless Communication Technologies
September 2, 2009, 12:00am PDT
The research goal has been synchronizing the process of asphalt production, asphalt transportation and pavement laying by connecting different machines together using wireless technologies....
Provided by University of Oulu
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White Papers
Supply Chain Performance Measurement In The Manufacturing Industry
January 5, 2011, 12:00am PST
Supply chain performance measurement - the process of qualifying the efficiency and effectiveness of the supply chain. The aim of this study is to create a supply chain measurement framework for...
Provided by University of Oulu
-
White Papers
Web-Based Framework for Spatiotemporal Screen Real Estate Management of Interactive Public Displays
April 16, 2010, 12:00am PDT
In this paper the authors present a web-based framework for spatiotemporal screen real estate management of interactive public displays. The framework facilitates dynamic partitioning of the...
Provided by University of Oulu
-
White Papers
Comparison of Touch, Mobile Phone, and Gesture Based Controlling of Browser Applications on a Large Screen
May 19, 2008, 12:00am PDT
The authors present a user study where three different controlling methods are utilized to control browser applications on a large screen. The test group consisted of 11 persons. First, the users...
Provided by University of Oulu
-
White Papers
A Note on Conjugacy Search and Racks
November 10, 2009, 12:00am PST
The authors show that for every effective left conjugacy closed left quasigroup, there is an induced rack that retains the conjugation structure of the left translations. This means that...
Provided by University of Oulu
-
White Papers
Customer Involvement And Organizational Design: Different Configurations Of Project Business Firms
August 18, 2008, 12:00am PDT
Although there is, until now, a considerable amount of academic literature cumulated on project business firms, the diversity of the firms is not well recognized. Knowing industrial business...
Provided by University of Oulu
-
White Papers
Networked Business Model Development In An Emerging Business Field
June 29, 2010, 12:00am PDT
Emerging technologies present many opportunities for new business creation but also pose many challenges. A variety of actors and roles need to be identified and organized into business nets to...
Provided by University of Oulu
-
White Papers
Internal Organizing In Project Business Organization In Relation To Customer Relationships
June 30, 2010, 12:00am PDT
This paper focuses on multinational project business organization and how the customer relationship is organized in such context. Organizing is used as a concept to describe the internal actions...
Provided by University of Oulu
-
White Papers
Levels Of Processes, Intertwining Actions And Network Change
August 28, 2010, 12:00am PDT
Studies on network dynamics are analyzed from the viewpoint of alternative conceptual and methodological approaches provided for research on network change. The paper emphasizes particularly two...
Provided by University of Oulu
-
White Papers
The Value Relevance Of Firms~ Integral Environmental Impact: Evidence From Russia
July 5, 2010, 12:00am PDT
The purpose of this paper is to investigate the value relevance of firms' integral environmental impact. In this paper, the authors utilize data from 74 Russian listed firms for the years...
Provided by University of Oulu
-
White Papers
Measuring and Modelling Sewer Pipes From Video
January 1, 2011, 12:00am PST
This paper presents a system for the automatic measurement and modelling of sewer pipes. The system recovers the interior shape of a sewer pipe from a video sequence which is acquired by a...
Provided by University of Oulu
-
White Papers
Guidelines for the Implementation of Cross-Platform Mobile Middleware
July 1, 2010, 12:00am PDT
The authors describe and analyze the experiences from a cross-platform mobile middleware project. The aim is to identify best practices and provide guidelines for solving similar problems in the...
Provided by University of Oulu
-
White Papers
Key Agreement Based on Homomorphisms of Algebraic Structures
April 21, 2011, 12:00am PDT
The authors give a generalization of the Diffie-Hellman key agreement scheme that is based on the hardness of computing homomorphic images from an algebra to another. They formulate computational...
Provided by University of Oulu
-
White Papers
Wireless Technologies in Process Automation - A Review and an Application Example
December 1, 2007, 12:00am PST
This paper studies the wireless technologies, their applications, characteristics, design criteria and requirements for process automation applications, focusing especially on Wireless Sensor...
Provided by University of Oulu
-
White Papers
Camera-Based Motion Recognition for Mobile Interaction
March 18, 2011, 12:00am PDT
Multiple built-in cameras and the small size of mobile phones are underexploited assets for creating novel applications that are ideal for pocket size devices, but may not make much sense with...
Provided by University of Oulu
-
White Papers
Cross-Layer Energy Analysis of Multi-Hop Wireless Sensor Networks
January 1, 2011, 12:00am PST
In this paper, the authors propose a detailed energy survey of the physical, data link, and network layer by analytical techniques. They also show the impact of regular sleep periods on node...
Provided by University of Oulu
-
White Papers
Implementation of the Least Squares Channel Estimation Algorithm for MIMO-OFDM Systems
February 18, 2009, 12:00am PST
The Least Squares (LS) channel estimation algorithm for a Multiple-Input Multiple-Output (MIMO) system with Orthogonal Frequency Division Multiplexing (OFDM) is considered in this paper. Two...
Provided by University of Oulu
-
White Papers
Institutional Viewpoint on Wireless Standardisation Process
January 1, 2011, 12:00am PST
The complexity of organizational and technological changes confronting most organizations has made an organizational change and adaptation a topical research question. This paper examines the...
Provided by University of Oulu
-
White Papers
Efficiency of the ALOHA Protocol in Multi-Hop Networks
April 5, 2010, 12:00am PDT
This paper presents the evaluation of the multi-hop aggregate information efficiency of the slotted and unslotted ALOHA protocols. The authors consider a multi-hop wireless network where the nodes...
Provided by University of Oulu
-
White Papers
MEDUSA: Middleware for End-User Composition of Ubiquitous Applications
November 16, 2009, 12:00am PST
Activity-Oriented Computing (AOC) is a paradigm promoting the run-time realization of applications by composing ubiquitous services in the user's surroundings according to abstract specifications...
Provided by University of Oulu
-
White Papers
A Review of the Scheduling Problem in Wireless Networks
August 13, 2009, 12:00am PDT
The authors describe the fundamental issue of scheduling the allocation of wireless network resources and provide several formulations of the associated problems. The emphasis is on scheduling...
Provided by University of Oulu
-
White Papers
Short-Range Wireless Sensor Networks for High Density Seismic Monitoring
April 20, 2009, 12:00am PDT
Acquisition systems for sub-surface diagnostic (for small earthquake monitoring) and exploration (for new oil and gas reservior) require a large number of sensors (geophones or accelerometers) to...
Provided by University of Oulu
-
White Papers
Auditory Context Recognition Using SVMs
May 15, 2008, 12:00am PDT
The authors study auditory context recognition for context-aware mobile computing systems. Auditory contexts are recordings of a mixture of sounds, or ambient audio, from mobile users' everyday...
Provided by University of Oulu
-
White Papers
Attack Patterns in VoIP
July 15, 2007, 12:00am PDT
In VoIP, in order to avoid attacks and discover security vulnerabilities, it is necessary to be aware of typical risks and to have a good understanding of how vulnerabilities can be exploited. In...
Provided by University of Oulu
-
White Papers
Peer-to-Peer Community Management Using Structured Overlay Networks
August 12, 2008, 12:00am PDT
In this paper, the authors present a system for the distributed management of user communities. The system utilizes multiple DHT overlay networks where nodes communicate in a peer-to-peer manner....
Provided by University of Oulu
-
White Papers
Supporting Session and Access Point Mobility in a Large Multi-Provider Multi-Vendor Municipal WiFi Network
August 16, 2008, 12:00am PDT
The authors present a simple network design for a large multi-provider municipal WiFi network where the WiFi zones of multiple organizations are merged into a single IP subnet at a central layer 2...
Provided by University of Oulu
-
White Papers
Partially Decentralised Context Management for P2P Communities
June 23, 2008, 12:00am PDT
The retrieval of context information is usually limited on a single user. Though some context subscription methods do exist, the mechanisms are not optimised for distributing context information...
Provided by University of Oulu
-
White Papers
P2P SCCM: Service-Oriented Community Coordinated Multimedia Over P2P and Experience on Multimedia Annotation Service Development
September 13, 2010, 12:00am PDT
Peer-to-Peer Service-oriented Community Coordinated Multimedia (SCCM) is envisioned as a novel paradigm in which the user consumes multiple media through requesting multimedia-intensive Web...
Provided by University of Oulu
-
White Papers
Robustness of a P2P Community Management System Based on Two-Level Hierarchical DHT Overlays
April 18, 2011, 12:00am PDT
The popularity of community-centric applications has rapidly grown during the recent years. In this paper, the authors evaluate the robustness of a P2P community management system, where...
Provided by University of Oulu
-
White Papers
PanOULU: Triple Helix Driven Municipal Wireless Network Providing Open and Free Internet Access
July 2, 2011, 12:00am PDT
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...
Provided by University of Oulu
-
White Papers
Distributed Web Service Architecture for Scalable Content Analysis: Semi-Automatic Annotation of User Generated Content
April 27, 2011, 12:00am PDT
This paper describes distributed web service architecture to allow web level scalability for multimedia content analysis. The authors introduce service component architecture that allows for...
Provided by University of Oulu
-
White Papers
Analysis of Messaging Load in a P2PP Overlay Network Under Churn
July 30, 2010, 12:00am PDT
The authors analyze the performance of a DHT-based P2P overlay network in resource access and overlay maintenance activities. They use a cross-platform implementation of the protocol called P2PP....
Provided by University of Oulu
-
White Papers
Improving Community Management Performance With Two-Level Hierarchical DHT Overlays
June 22, 2009, 12:00am PDT
In this paper, the authors evaluate a P2P community management system that works on top of a DHT-based P2PSIP protocol implementation. The key idea in their system is to establish a separate DHT...
Provided by University of Oulu
-
White Papers
Battery Life of Mobile Peers With UMTS and WLAN in a Kademlia-Based P2P Overlay
August 3, 2009, 12:00am PDT
The authors evaluate the battery life of mobile devices that act as full-fledged peer nodes in a Kademlia DHT based P2P overlay network. The motivation is to find out how long a mobile peer is...
Provided by University of Oulu
-
White Papers
Using Unstructured Service Supplementary Data Signaling for Mobile Peer-to-Peer Invocations
July 19, 2009, 12:00am PDT
This paper proposes a method for initiating IP-based Peer-To-Peer (P2P) communication sessions in cases where the target of the initial communication attempt is a mobile device. Mobile P2P...
Provided by University of Oulu
-
White Papers
BlueInfo: Open Architecture for Deploying Web Services in WPAN Hotspots
April 28, 2009, 12:00am PDT
The authors 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...
Provided by University of Oulu
-
White Papers
A Robust Algorithm for the Membership Management of Super-Peer Overlay
November 17, 2009, 12:00am PST
Peer-to-Peer technologies have been widely applied for multimedia applications. The super-peer based approach provides an efficient way to run applications by exploring nodes' heterogeneity. In...
Provided by University of Oulu
-
White Papers
Effects of Different Churn Models on the Performance of Structured Peer-to-Peer Networks
July 27, 2009, 12:00am PDT
The authors present the effects of different churn models on the performance of structured Peer-To-Peer (P2P) networks in this paper. Specifically, Exponential Distribution (ED), Pareto...
Provided by University of Oulu
-
Whitepapers
Comparison and Analysis of Secure Mobile Architecture (SMA) and Evolved Packet System
February 22, 2011, 12:00am PST
In this paper, the authors analyze and compare two architectures providing an all-IP based connectivity and mobility for mobile devices over heterogeneous access technologies: Evolved Packet...
Provided by University of Oulu
-
Whitepapers
Securing the Backhaul for Mobile and Multi-Homed Femtocells
June 14, 2011, 12:00am PDT
The evolution of femtocells in residential networks expects to accelerate dramatically in next few years. The Femto Access Points (FAPs) connect subscribers to the operator through the residential...
Provided by University of Oulu
-
Whitepapers
Secure and Multihomed Vehicular Femtocells
June 14, 2012, 12:00am PDT
Operators must ensure seamless voice and data session continuity even when subscribers are on move. Service continuity is one of the most critical quality parameter in a cellular system. QoS...
Provided by University of Oulu
-
Whitepapers
Inter Technology Load Balancing Algorithm for Evolved Packet System
June 13, 2012, 12:00am PDT
In this paper, the authors present an advanced load balancing algorithm for Evolved Packet System utilizing different radio interfaces. By using the fact that Evolved Packet Core can support, in...
Provided by University of Oulu
-
Whitepapers
Secured VPN Models for LTE Backhaul Networks
June 12, 2012, 12:00am PDT
The Long Term Evolution (LTE) architecture proposes a flat all-IP backhaul network. 3rd Generation Partnership Project (3GPP) specified new security and traffic transport requirements of new LTE...
Provided by University of Oulu
-
Whitepapers
Survey on Congestion Control Mechanisms for Wireless Sensor Networks
June 11, 2012, 12:00am PDT
Congestion is very common in 6LoWPAN networks, but classical congestion control techniques do not suit well to the resource constrained environments. The main goal of this paper is to make an...
Provided by University of Oulu
-
White Papers
Effects of Different Churn Models on the Performance of Structured Peer-to-Peer Networks
July 27, 2009, 12:00am PDT
The authors present the effects of different churn models on the performance of structured Peer-To-Peer (P2P) networks in this paper. Specifically, Exponential Distribution (ED), Pareto...
Provided by University of Oulu
-
White Papers
A Robust Algorithm for the Membership Management of Super-Peer Overlay
November 17, 2009, 12:00am PST
Peer-to-Peer technologies have been widely applied for multimedia applications. The super-peer based approach provides an efficient way to run applications by exploring nodes' heterogeneity. In...
Provided by University of Oulu
-
White Papers
BlueInfo: Open Architecture for Deploying Web Services in WPAN Hotspots
April 28, 2009, 12:00am PDT
The authors 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...
Provided by University of Oulu
-
White Papers
Using Unstructured Service Supplementary Data Signaling for Mobile Peer-to-Peer Invocations
July 19, 2009, 12:00am PDT
This paper proposes a method for initiating IP-based Peer-To-Peer (P2P) communication sessions in cases where the target of the initial communication attempt is a mobile device. Mobile P2P...
Provided by University of Oulu
-
White Papers
Battery Life of Mobile Peers With UMTS and WLAN in a Kademlia-Based P2P Overlay
August 3, 2009, 12:00am PDT
The authors evaluate the battery life of mobile devices that act as full-fledged peer nodes in a Kademlia DHT based P2P overlay network. The motivation is to find out how long a mobile peer is...
Provided by University of Oulu
-
White Papers
Improving Community Management Performance With Two-Level Hierarchical DHT Overlays
June 22, 2009, 12:00am PDT
In this paper, the authors evaluate a P2P community management system that works on top of a DHT-based P2PSIP protocol implementation. The key idea in their system is to establish a separate DHT...
Provided by University of Oulu
-
White Papers
Analysis of Messaging Load in a P2PP Overlay Network Under Churn
July 30, 2010, 12:00am PDT
The authors analyze the performance of a DHT-based P2P overlay network in resource access and overlay maintenance activities. They use a cross-platform implementation of the protocol called P2PP....
Provided by University of Oulu
-
White Papers
Distributed Web Service Architecture for Scalable Content Analysis: Semi-Automatic Annotation of User Generated Content
April 27, 2011, 12:00am PDT
This paper describes distributed web service architecture to allow web level scalability for multimedia content analysis. The authors introduce service component architecture that allows for...
Provided by University of Oulu
-
White Papers
PanOULU: Triple Helix Driven Municipal Wireless Network Providing Open and Free Internet Access
July 2, 2011, 12:00am PDT
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...
Provided by University of Oulu
-
White Papers
Robustness of a P2P Community Management System Based on Two-Level Hierarchical DHT Overlays
April 18, 2011, 12:00am PDT
The popularity of community-centric applications has rapidly grown during the recent years. In this paper, the authors evaluate the robustness of a P2P community management system, where...
Provided by University of Oulu
-
White Papers
P2P SCCM: Service-Oriented Community Coordinated Multimedia Over P2P and Experience on Multimedia Annotation Service Development
September 13, 2010, 12:00am PDT
Peer-to-Peer Service-oriented Community Coordinated Multimedia (SCCM) is envisioned as a novel paradigm in which the user consumes multiple media through requesting multimedia-intensive Web...
Provided by University of Oulu
-
White Papers
Partially Decentralised Context Management for P2P Communities
June 23, 2008, 12:00am PDT
The retrieval of context information is usually limited on a single user. Though some context subscription methods do exist, the mechanisms are not optimised for distributing context information...
Provided by University of Oulu
-
White Papers
Supporting Session and Access Point Mobility in a Large Multi-Provider Multi-Vendor Municipal WiFi Network
August 16, 2008, 12:00am PDT
The authors present a simple network design for a large multi-provider municipal WiFi network where the WiFi zones of multiple organizations are merged into a single IP subnet at a central layer 2...
Provided by University of Oulu
-
White Papers
Peer-to-Peer Community Management Using Structured Overlay Networks
August 12, 2008, 12:00am PDT
In this paper, the authors present a system for the distributed management of user communities. The system utilizes multiple DHT overlay networks where nodes communicate in a peer-to-peer manner....
Provided by University of Oulu
-
White Papers
Attack Patterns in VoIP
July 15, 2007, 12:00am PDT
In VoIP, in order to avoid attacks and discover security vulnerabilities, it is necessary to be aware of typical risks and to have a good understanding of how vulnerabilities can be exploited. In...
Provided by University of Oulu
-
White Papers
Auditory Context Recognition Using SVMs
May 15, 2008, 12:00am PDT
The authors study auditory context recognition for context-aware mobile computing systems. Auditory contexts are recordings of a mixture of sounds, or ambient audio, from mobile users' everyday...
Provided by University of Oulu
-
White Papers
Short-Range Wireless Sensor Networks for High Density Seismic Monitoring
April 20, 2009, 12:00am PDT
Acquisition systems for sub-surface diagnostic (for small earthquake monitoring) and exploration (for new oil and gas reservior) require a large number of sensors (geophones or accelerometers) to...
Provided by University of Oulu
-
White Papers
A Review of the Scheduling Problem in Wireless Networks
August 13, 2009, 12:00am PDT
The authors describe the fundamental issue of scheduling the allocation of wireless network resources and provide several formulations of the associated problems. The emphasis is on scheduling...
Provided by University of Oulu
-
White Papers
MEDUSA: Middleware for End-User Composition of Ubiquitous Applications
November 16, 2009, 12:00am PST
Activity-Oriented Computing (AOC) is a paradigm promoting the run-time realization of applications by composing ubiquitous services in the user's surroundings according to abstract specifications...
Provided by University of Oulu
-
White Papers
Efficiency of the ALOHA Protocol in Multi-Hop Networks
April 5, 2010, 12:00am PDT
This paper presents the evaluation of the multi-hop aggregate information efficiency of the slotted and unslotted ALOHA protocols. The authors consider a multi-hop wireless network where the nodes...
Provided by University of Oulu
-
White Papers
Institutional Viewpoint on Wireless Standardisation Process
January 1, 2011, 12:00am PST
The complexity of organizational and technological changes confronting most organizations has made an organizational change and adaptation a topical research question. This paper examines the...
Provided by University of Oulu
-
White Papers
Implementation of the Least Squares Channel Estimation Algorithm for MIMO-OFDM Systems
February 18, 2009, 12:00am PST
The Least Squares (LS) channel estimation algorithm for a Multiple-Input Multiple-Output (MIMO) system with Orthogonal Frequency Division Multiplexing (OFDM) is considered in this paper. Two...
Provided by University of Oulu
-
White Papers
Cross-Layer Energy Analysis of Multi-Hop Wireless Sensor Networks
January 1, 2011, 12:00am PST
In this paper, the authors propose a detailed energy survey of the physical, data link, and network layer by analytical techniques. They also show the impact of regular sleep periods on node...
Provided by University of Oulu
-
White Papers
Camera-Based Motion Recognition for Mobile Interaction
March 18, 2011, 12:00am PDT
Multiple built-in cameras and the small size of mobile phones are underexploited assets for creating novel applications that are ideal for pocket size devices, but may not make much sense with...
Provided by University of Oulu
-
White Papers
Wireless Technologies in Process Automation - A Review and an Application Example
December 1, 2007, 12:00am PST
This paper studies the wireless technologies, their applications, characteristics, design criteria and requirements for process automation applications, focusing especially on Wireless Sensor...
Provided by University of Oulu
-
White Papers
Key Agreement Based on Homomorphisms of Algebraic Structures
April 21, 2011, 12:00am PDT
The authors give a generalization of the Diffie-Hellman key agreement scheme that is based on the hardness of computing homomorphic images from an algebra to another. They formulate computational...
Provided by University of Oulu
-
White Papers
Guidelines for the Implementation of Cross-Platform Mobile Middleware
July 1, 2010, 12:00am PDT
The authors describe and analyze the experiences from a cross-platform mobile middleware project. The aim is to identify best practices and provide guidelines for solving similar problems in the...
Provided by University of Oulu
-
White Papers
Measuring and Modelling Sewer Pipes From Video
January 1, 2011, 12:00am PST
This paper presents a system for the automatic measurement and modelling of sewer pipes. The system recovers the interior shape of a sewer pipe from a video sequence which is acquired by a...
Provided by University of Oulu
-
White Papers
The Value Relevance Of Firms~ Integral Environmental Impact: Evidence From Russia
July 5, 2010, 12:00am PDT
The purpose of this paper is to investigate the value relevance of firms' integral environmental impact. In this paper, the authors utilize data from 74 Russian listed firms for the years...
Provided by University of Oulu
-
White Papers
Levels Of Processes, Intertwining Actions And Network Change
August 28, 2010, 12:00am PDT
Studies on network dynamics are analyzed from the viewpoint of alternative conceptual and methodological approaches provided for research on network change. The paper emphasizes particularly two...
Provided by University of Oulu
-
White Papers
Internal Organizing In Project Business Organization In Relation To Customer Relationships
June 30, 2010, 12:00am PDT
This paper focuses on multinational project business organization and how the customer relationship is organized in such context. Organizing is used as a concept to describe the internal actions...
Provided by University of Oulu
-
White Papers
Networked Business Model Development In An Emerging Business Field
June 29, 2010, 12:00am PDT
Emerging technologies present many opportunities for new business creation but also pose many challenges. A variety of actors and roles need to be identified and organized into business nets to...
Provided by University of Oulu
-
White Papers
Customer Involvement And Organizational Design: Different Configurations Of Project Business Firms
August 18, 2008, 12:00am PDT
Although there is, until now, a considerable amount of academic literature cumulated on project business firms, the diversity of the firms is not well recognized. Knowing industrial business...
Provided by University of Oulu
-
White Papers
A Note on Conjugacy Search and Racks
November 10, 2009, 12:00am PST
The authors show that for every effective left conjugacy closed left quasigroup, there is an induced rack that retains the conjugation structure of the left translations. This means that...
Provided by University of Oulu
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