Uppsala University

Displaying 1-40 of 40 results

  • White Papers // Sep 2011

    RealProct: Reliable Protocol Conformance Testing With Real Nodes for Wireless Sensor Networks

    Despite the various applications of Wireless Sensor Network (WSN), experiences from real WSN deployments show that protocol implementations in sensor nodes are susceptible to software failures, which may cause network failures or even breakdown. Pre-deployment protocol conformance testing is essential to ensure reliable communications for WSNs. Unfortunately, existing solutions with...

    Provided By Uppsala University

  • White Papers // Sep 2011

    Exploring Sensor Network Communication Strategies With the Mote-in-the-Loop Approach

    The performance of wireless sensor networks is heavily influenced by the surrounding environment. Hence, in different scenarios different communication strategies, i.e., different packet sizes or retransmission strategies etc., are preferable. There are, however, currently no appropriate methods to investigate the optimal strategy. Analysis and simulation rely on abstract, often unrealistic...

    Provided By Uppsala University

  • White Papers // Jul 2011

    Cooperative State Estimation for Preserving Privacy of User Behaviors in Smart Grid

    Smart grid promises a reliable and secure electricity infrastructure to meet the future demand growth. However, the increase of data types and data amount from advanced smart grid introduce new privacy issues, which have to be resolved for customers. This paper presents a cooperative state estimation technique that protects the...

    Provided By Uppsala University

  • White Papers // Jan 2011

    Benchmark Simulation Model No. 1 With a Wireless Sensor Network for Monitoring and Control

    The implementation of Wireless Sensor Networks (WSNs) for wastewater treatment plant monitoring and control is rare in the literature. Nevertheless, there seem to be some good reasons for considering this application, since WSNs can easily supply several point measurements and keep track on a single variable over a wide area....

    Provided By Uppsala University

  • White Papers // Jan 2011

    A Mote-in-theLoop Approach for Exploring Communication Strategies for Sensor Networks

    Sensor networks are being deployed in a range of different environments, such as industry plants, rainforests and offices. Each environment has its own characteristics and the appropriate communication strategy will differ accordingly - packet sizes, retransmission schemes, error correcting codes, etc. It is, however, difficult to investigate the most appropriate...

    Provided By Uppsala University

  • White Papers // Jan 2011

    Daigan: Constructing Proxy Networks Using SelNet

    The authors present Daigan, a tool for constructing proxy networks using the SelNet indirection layer. Using the indirection capabilities of SelNet, they can construct on-demand chains of proxies for adapting content for mobile devices. Daigan takes a specification of a device's capabilities and from that identifies which proxies are needed...

    Provided By Uppsala University

  • White Papers // Jan 2011

    Sensor Networking in Aquatic Environments - Experiences and New Challenges

    In this paper the authors present the design and implementation of a small-scale marine sensor network. The network monitors the temperature in the Baltic Sea on different heights from the water surface down to the bottom. Unlike many other wireless sensor networks, this network contains both a wired and a...

    Provided By Uppsala University

  • White Papers // Jan 2011

    A Large-Scale Testbed for Reproducible Ad Hoc Protocol Evaluations

    The authors have built an Ad hoc Protocol Evaluation testbed (APE) in order to perform large-scale, reproducible experiments. APE aims at assessing several different routing protocols in a real-world environment instead of by simulation. They present the APE testbed architecture and report on initial experiments with up to 37 physical...

    Provided By Uppsala University

  • White Papers // Jan 2011

    A Design Space Analysis of Internet Connectivity for Mobile Ad Hoc Networks

    The authors present a design space analysis of the problem of providing Internet connectivity for Mobile Ad hoc NETworks (MANETs). Currently there are a plethora of proposals to solve this problem in the research community. However, they argue that many of the existing designs suffer from complexity and design solutions...

    Provided By Uppsala University

  • White Papers // Jan 2011

    Mythbusters: Whatever You Thought About MANET Routing, Think Again. . .

    Protocol and system designs suffer from myths that may affect their nature and purpose as well as their features and capabilities. The authors investigate the myths surrounding Mobile Ad hoc NETworks (MANETs) and the impact of these myths on the ability to build robust, efficient and simple routing protocols. They...

    Provided By Uppsala University

  • White Papers // Jan 2011

    OFDMA Uplink Channel Predicion to Enable Frequency-Adaptive Multiuser Scheduling

    Frequency-adaptive multiuser scheduling utilizes the frequency-selective small-scale fading to allocate subcarriers with advantageous signal-to-noise ratio to each user. Due to channel time-variability and delays of the transmission control loop, this will in general require channel prediction. FDD (Frequency Division Duplex) uplinks pose the most challenging prediction problem: All sub-bands that...

    Provided By Uppsala University

  • White Papers // Dec 2010

    Microfinance "Plus": The Impact Of Business Training On Indian Self Help Groups

    The provision of business training with microfinance leads to a positive impact on assets for the participating households. The authors correct for membership selection bias and account for potential training endogeneity with propensity score matching, using data from the Self Help Group microfinance program in India. The Self Help Group...

    Provided By Uppsala University

  • White Papers // Sep 2010

    Energy-Efficient Task-Mapping for Data-Driven Sensor Network Macroprogramming Using Constraint Programming

    Using Constraint Programming (CP), the authors address the task-mapping problem in data-driven macroprogramming for Wireless Sensor Networks (WSNs). A task graph representing the flow of data among tasks assists the application developer in specifying the features of a WSN at a high level of abstraction. A problem that arises in...

    Provided By Uppsala University

  • White Papers // Sep 2010

    Rational Expectations And Inflation Targeting - An Analysis For Ten Countries

    In this paper, the author evaluates inflation targeting for ten countries. The evaluation is based on unconditional as well as conditional measures of the variance of inflation around target. With strict inflation targeting, expectations of the future deviation from target given information about the deviation from the target today should...

    Provided By Uppsala University

  • White Papers // Aug 2010

    Shaping A New Industry - A Market Perspective

    In contemporary policymaking there is a strong consensus that industries related to advanced knowledge and science are important for national competitiveness and economic growth. The underlying assumption is that the use of new knowledge, products and processes can strengthen industrial competitiveness and increase national wealth. Although the potential of innovation...

    Provided By Uppsala University

  • White Papers // Aug 2010

    Reading' The Business Landscape - When Business Networks Are Supposed To Be Affected By Innovation Policy

    To contribute to the development of innovative and prospering companies has become one of the most important contemporary policy issues, on national as well as trans-national levels. This implies that to act on a relevant understanding of the basic processes in the business landscape is crucial for politicians as well...

    Provided By Uppsala University

  • White Papers // Aug 2010

    Clandestine And Arranged Marriages A Study On Business Relationships In Light Of Market Structures

    The perception of business being based on arm's length market exchange, which IMP studies were a reaction against, still influences many business settings as well as legal structures. By recognizing the influence of such a market perception on business exchange and on different structures within which business relationships evolve and...

    Provided By Uppsala University

  • White Papers // Aug 2010

    Deliberately Changed Boundaries As A Means For Analyzing Business Decisions

    This paper takes industrial network theory as its starting point. It argues that when dealing with business decisions, managers often need to deliberately change their analytical boundaries of the system they are viewing in order to improve the way that activities are structured and resource collections are set up and...

    Provided By Uppsala University

  • White Papers // Aug 2010

    The Effect Of Discontinuity On Business Relationship

    Ongoing interactions and continuity in business is commonly the presumption when studying long-term oriented business relationships. Still, there are many long-term oriented businesses that are characterized by intermittent affairs with periods of high activity interlaced with periods of little or no business exchange. The business relationships formed around this kind...

    Provided By Uppsala University

  • White Papers // Aug 2010

    Is Tolerance Good Or Bad For Growth?

    The authors investigate to what extent tolerance, as measured by attitudes toward different types of neighbors, affects economic growth. Data from the World Values Survey enable one to investigate tolerance - growth relationships for 54 countries. They provide estimates based on cross-sectional as well as panel-data regressions. In addition they...

    Provided By Uppsala University

  • White Papers // Jul 2010

    Wireless Sensor Network Deployment in Mobile Phones Assisted Environment

    Wireless sensor networks have been widely deployed to perform sensing constantly at specific locations, but their energy consumption and deployment cost are of great concern. With the popularity and advanced technologies of mobile phones, participatory urban sensing is a rising and promising field which utilizes mobile phones as mobile sensors...

    Provided By Uppsala University

  • White Papers // Jun 2010

    Scalability for Social Network Analysis Algorithms

    A Social network is a social structure made up of individuals called "Nodes" which are tied by "Edges". One example of a source for social network analysis is traffic in a mobile telephony network where the subscribers are 'Nodes' and the 'Edges' are derived from the telecom traffic in the...

    Provided By Uppsala University

  • White Papers // May 2010

    Gender, Wages And Social Security In China's Industrial Sector

    This paper compares average earnings and productivities for men and women employed in roughly 200,000 Chinese industrial enterprises. Women's average wages lag behind men's wages by 11%, and this result is robust to the inclusion of non-wage income in the form of social insurance payments. The gender-wage gap is wider...

    Provided By Uppsala University

  • White Papers // Apr 2010

    New Public Management As A Trigger And Impeder In Usage Of New Medical Technology In Public Healthcare

    The incessant contemporary debate on scientific progress puts much emphasis on economical consequences of scientific breakthroughs, especially so on a policy level. Scientific research is supposed to generate fast profit innovations, in the shortest time possible to the content of the society as a whole. This belief in scientific progress...

    Provided By Uppsala University

  • White Papers // Mar 2010

    Shifting Initiatives And Interacted Strategies Within Business Relationships. Analyzing The Dr Motor-Chery Relationship

    In this paper the authors adopt an IMP interaction perspective to study the evolution of a business relationship. An exploratory approach is applied to develop an analytical framework that connects shifting initiatives and interacted strategies within the development of business relationships. Specifically, the authors utilize the case study of the...

    Provided By Uppsala University

  • White Papers // Feb 2010

    Scientific And Business Resources In Interaction

    This paper deals specifically with how the transformation of a new scientific achievement into a business innovation can be understood from a resource interaction perspective. To achieve innovation, that is to say to transform an invention, or a product or process development, into a widely used commercial solution, is seen...

    Provided By Uppsala University

  • White Papers // Oct 2009

    Sensei-UU: A Nomadic Sensor Network Testbed Supporting Mobile

    The authors present Sensei - a nomadic, or relocatable, Wireless Sensor Network (WSN) testbed with support for mobile nodes. The nomadism makes it possible to evaluate a WSN application in different environments ranging from lab environment to in-situ installations to prototype deployments. Other WSN testbeds are often static and can...

    Provided By Uppsala University

  • White Papers // Sep 2009

    Probabilistic Analysis of Hierarchical Cluster Protocols for Wireless Sensor Networks

    Wireless sensor networks are designed to extract data from the deployment environment and combine sensing, data processing and wireless communication to provide useful information for the network users. Hundreds or thousands of small embedded units, which operate under low-energy supply and with limited access to central network control, rely on...

    Provided By Uppsala University

  • White Papers // Sep 2009

    Information-Aware Traffic Reduction for Wireless Sensor Networks

    Environmental monitoring is one of the most popular applications in wireless sensor networks. Although it is important to obtain a continuous record of the environment, users may gain enough information without receiving every routine sensor measurement. Reducing unnecessary traffic allows better utilization of the network resources. However, it is uneasy...

    Provided By Uppsala University

  • White Papers // Sep 2009

    Scrutinizing An Economic Development Model - The Taiwanese Semiconductor Industry Revisited

    To promote industrial development and economic growth is a vital issue for governments all over the world. The ideals guiding policymakers in their endeavours, strongly influenced by traditional economics and the innovation system approach, are that innovations based on new and advanced knowledge are central for industrial and economic development....

    Provided By Uppsala University

  • White Papers // Sep 2009

    Investigating The Gap: Interdependent, Global Business Networks Versus National Policy Means

    The contemporary economic crisis has made one of the most striking, but hitherto rather hidden aspects of the business landscape very clear: The technological and commercial interdependencies that stretches across company, regional and national borders. Regardless what deal between a customer and seller that never come to being due to...

    Provided By Uppsala University

  • White Papers // Sep 2009

    Effect Of Political Actors On Small Firms' Business Relationships And Performance

    Despite the statement of many researchers and politicians on the vital role of SMEs for their contributions to GNP and employment, the research on SMEs relationship with political organizations is left almost untouched. This paper highlights the effect of political organizations like EU, on SMEs business performance. With emphasis on...

    Provided By Uppsala University

  • White Papers // Jun 2009

    Defect Cause Modeling With Decision Tree and Regression Analysis

    Power line channel is proposed as an alternative for broadband data transmission especially in developing countries like Tanzania. However the channel is affected by stochastic attenuation and deep notches which can lead to the limitation of channel capacity and achievable data rate. Various studies have characterized the channel without giving...

    Provided By Uppsala University

  • White Papers // Jun 2009

    Genuine Saving Under Stochastic Growth

    The concept of genuine saving appeared for the first time in a proof of a now well known theorem in Weitzman (1976). It was reinvented and used as a local welfare indicator by Pearce and Atkinson (1993). The purpose of this paper is to generalize this welfare measure to a...

    Provided By Uppsala University

  • White Papers // May 2009

    Haggle: A Data-Centric Network Architecture for Mobile Devices

    Delay-tolerant and opportunistic networks relax the traditional assumption of end-to-end connectivity. Such networks are therefore suitable for content dissemination in sparsely connected regions of the world, and for complementing existing infrastructure by operating cost-free, high bandwidth, albeit high latency, content delivery services. In this paper, the authors argue, however, that...

    Provided By Uppsala University

  • White Papers // Apr 2009

    Managing Cross Layer Information in OMNeT++ Simulations

    This paper describes a general approach to dealing with cross layer information in OMNeT++-based network simulations. Rather than prescribe a specific cross layer architecture, this work is intended to address the software engineering problem of passing information between simulation modules in a sound way. An XML-based mechanism for passing information...

    Provided By Uppsala University

  • White Papers // Mar 2009

    Routing of High-Priority Packets in Wireless Sensor Networks

    The Random Re-Routing (RRR) algorithm has recently been introduced to provide fast adaptive priority routing to rapidly convey packets of important events in sensor networks, while forwarding routine and lower priority traffic along some secondary network paths. This technique can be applied for sensor networks which monitor the environment by...

    Provided By Uppsala University

  • White Papers // Feb 2009

    Key Technologies for IMT-Advanced Mobile Communication Systems

    WINNER is an ambitious research project aiming at identification, development and assessment of key technologies for IMT-Advanced mobile communication systems. WINNER has devised an OFDMA based system concept with excellent system level performance, for flexible deployments in a wide variety of operating conditions. The WINNER system provides a significant step...

    Provided By Uppsala University

  • White Papers // Jan 2009

    A Search-Based Network Architecture for Mobile Devices

    This paper presents the Haggle network architecture and experimental measurements of its performance in a realistic environment. Haggle provides a search-based data dissemination framework for mobile opportunistic communication environments, making it easy to share content directly between intermittently connected mobile devices. Haggle's novel approach is based on its identification of...

    Provided By Uppsala University

  • White Papers // Jan 2009

    The SSF Wireless IP Project: Final Report

    The Wireless IP project within the SSF IT program 2002-2005 has been a collaborative research effort involving researchers from Uppsala University, Chalmers University of Technology and Karlstad University. Industrial partners were Ericsson Research and Ericsson in Goteborg. Uppsala University acted as lead partner. The objectives were to develop and to...

    Provided By Uppsala University

  • White Papers // Jun 2009

    Defect Cause Modeling With Decision Tree and Regression Analysis

    Power line channel is proposed as an alternative for broadband data transmission especially in developing countries like Tanzania. However the channel is affected by stochastic attenuation and deep notches which can lead to the limitation of channel capacity and achievable data rate. Various studies have characterized the channel without giving...

    Provided By Uppsala University

  • White Papers // Feb 2010

    Scientific And Business Resources In Interaction

    This paper deals specifically with how the transformation of a new scientific achievement into a business innovation can be understood from a resource interaction perspective. To achieve innovation, that is to say to transform an invention, or a product or process development, into a widely used commercial solution, is seen...

    Provided By Uppsala University

  • White Papers // Mar 2010

    Shifting Initiatives And Interacted Strategies Within Business Relationships. Analyzing The Dr Motor-Chery Relationship

    In this paper the authors adopt an IMP interaction perspective to study the evolution of a business relationship. An exploratory approach is applied to develop an analytical framework that connects shifting initiatives and interacted strategies within the development of business relationships. Specifically, the authors utilize the case study of the...

    Provided By Uppsala University

  • White Papers // Aug 2010

    Reading' The Business Landscape - When Business Networks Are Supposed To Be Affected By Innovation Policy

    To contribute to the development of innovative and prospering companies has become one of the most important contemporary policy issues, on national as well as trans-national levels. This implies that to act on a relevant understanding of the basic processes in the business landscape is crucial for politicians as well...

    Provided By Uppsala University

  • White Papers // Aug 2010

    Clandestine And Arranged Marriages A Study On Business Relationships In Light Of Market Structures

    The perception of business being based on arm's length market exchange, which IMP studies were a reaction against, still influences many business settings as well as legal structures. By recognizing the influence of such a market perception on business exchange and on different structures within which business relationships evolve and...

    Provided By Uppsala University

  • White Papers // Aug 2010

    Deliberately Changed Boundaries As A Means For Analyzing Business Decisions

    This paper takes industrial network theory as its starting point. It argues that when dealing with business decisions, managers often need to deliberately change their analytical boundaries of the system they are viewing in order to improve the way that activities are structured and resource collections are set up and...

    Provided By Uppsala University

  • White Papers // Aug 2010

    The Effect Of Discontinuity On Business Relationship

    Ongoing interactions and continuity in business is commonly the presumption when studying long-term oriented business relationships. Still, there are many long-term oriented businesses that are characterized by intermittent affairs with periods of high activity interlaced with periods of little or no business exchange. The business relationships formed around this kind...

    Provided By Uppsala University

  • White Papers // Aug 2010

    Shaping A New Industry - A Market Perspective

    In contemporary policymaking there is a strong consensus that industries related to advanced knowledge and science are important for national competitiveness and economic growth. The underlying assumption is that the use of new knowledge, products and processes can strengthen industrial competitiveness and increase national wealth. Although the potential of innovation...

    Provided By Uppsala University

  • White Papers // Apr 2010

    New Public Management As A Trigger And Impeder In Usage Of New Medical Technology In Public Healthcare

    The incessant contemporary debate on scientific progress puts much emphasis on economical consequences of scientific breakthroughs, especially so on a policy level. Scientific research is supposed to generate fast profit innovations, in the shortest time possible to the content of the society as a whole. This belief in scientific progress...

    Provided By Uppsala University

  • White Papers // Sep 2009

    Scrutinizing An Economic Development Model - The Taiwanese Semiconductor Industry Revisited

    To promote industrial development and economic growth is a vital issue for governments all over the world. The ideals guiding policymakers in their endeavours, strongly influenced by traditional economics and the innovation system approach, are that innovations based on new and advanced knowledge are central for industrial and economic development....

    Provided By Uppsala University

  • White Papers // Sep 2009

    Investigating The Gap: Interdependent, Global Business Networks Versus National Policy Means

    The contemporary economic crisis has made one of the most striking, but hitherto rather hidden aspects of the business landscape very clear: The technological and commercial interdependencies that stretches across company, regional and national borders. Regardless what deal between a customer and seller that never come to being due to...

    Provided By Uppsala University

  • White Papers // Sep 2009

    Effect Of Political Actors On Small Firms' Business Relationships And Performance

    Despite the statement of many researchers and politicians on the vital role of SMEs for their contributions to GNP and employment, the research on SMEs relationship with political organizations is left almost untouched. This paper highlights the effect of political organizations like EU, on SMEs business performance. With emphasis on...

    Provided By Uppsala University

  • White Papers // Sep 2010

    Rational Expectations And Inflation Targeting - An Analysis For Ten Countries

    In this paper, the author evaluates inflation targeting for ten countries. The evaluation is based on unconditional as well as conditional measures of the variance of inflation around target. With strict inflation targeting, expectations of the future deviation from target given information about the deviation from the target today should...

    Provided By Uppsala University

  • White Papers // Sep 2009

    Information-Aware Traffic Reduction for Wireless Sensor Networks

    Environmental monitoring is one of the most popular applications in wireless sensor networks. Although it is important to obtain a continuous record of the environment, users may gain enough information without receiving every routine sensor measurement. Reducing unnecessary traffic allows better utilization of the network resources. However, it is uneasy...

    Provided By Uppsala University

  • White Papers // Jun 2009

    Genuine Saving Under Stochastic Growth

    The concept of genuine saving appeared for the first time in a proof of a now well known theorem in Weitzman (1976). It was reinvented and used as a local welfare indicator by Pearce and Atkinson (1993). The purpose of this paper is to generalize this welfare measure to a...

    Provided By Uppsala University

  • White Papers // Oct 2009

    Sensei-UU: A Nomadic Sensor Network Testbed Supporting Mobile

    The authors present Sensei - a nomadic, or relocatable, Wireless Sensor Network (WSN) testbed with support for mobile nodes. The nomadism makes it possible to evaluate a WSN application in different environments ranging from lab environment to in-situ installations to prototype deployments. Other WSN testbeds are often static and can...

    Provided By Uppsala University

  • White Papers // Jan 2011

    Benchmark Simulation Model No. 1 With a Wireless Sensor Network for Monitoring and Control

    The implementation of Wireless Sensor Networks (WSNs) for wastewater treatment plant monitoring and control is rare in the literature. Nevertheless, there seem to be some good reasons for considering this application, since WSNs can easily supply several point measurements and keep track on a single variable over a wide area....

    Provided By Uppsala University

  • White Papers // Jan 2011

    Daigan: Constructing Proxy Networks Using SelNet

    The authors present Daigan, a tool for constructing proxy networks using the SelNet indirection layer. Using the indirection capabilities of SelNet, they can construct on-demand chains of proxies for adapting content for mobile devices. Daigan takes a specification of a device's capabilities and from that identifies which proxies are needed...

    Provided By Uppsala University

  • White Papers // Jan 2011

    A Mote-in-theLoop Approach for Exploring Communication Strategies for Sensor Networks

    Sensor networks are being deployed in a range of different environments, such as industry plants, rainforests and offices. Each environment has its own characteristics and the appropriate communication strategy will differ accordingly - packet sizes, retransmission schemes, error correcting codes, etc. It is, however, difficult to investigate the most appropriate...

    Provided By Uppsala University

  • White Papers // Jan 2011

    Sensor Networking in Aquatic Environments - Experiences and New Challenges

    In this paper the authors present the design and implementation of a small-scale marine sensor network. The network monitors the temperature in the Baltic Sea on different heights from the water surface down to the bottom. Unlike many other wireless sensor networks, this network contains both a wired and a...

    Provided By Uppsala University

  • White Papers // May 2010

    Gender, Wages And Social Security In China's Industrial Sector

    This paper compares average earnings and productivities for men and women employed in roughly 200,000 Chinese industrial enterprises. Women's average wages lag behind men's wages by 11%, and this result is robust to the inclusion of non-wage income in the form of social insurance payments. The gender-wage gap is wider...

    Provided By Uppsala University

  • White Papers // Jan 2009

    The SSF Wireless IP Project: Final Report

    The Wireless IP project within the SSF IT program 2002-2005 has been a collaborative research effort involving researchers from Uppsala University, Chalmers University of Technology and Karlstad University. Industrial partners were Ericsson Research and Ericsson in Goteborg. Uppsala University acted as lead partner. The objectives were to develop and to...

    Provided By Uppsala University

  • White Papers // Jan 2009

    A Search-Based Network Architecture for Mobile Devices

    This paper presents the Haggle network architecture and experimental measurements of its performance in a realistic environment. Haggle provides a search-based data dissemination framework for mobile opportunistic communication environments, making it easy to share content directly between intermittently connected mobile devices. Haggle's novel approach is based on its identification of...

    Provided By Uppsala University

  • White Papers // Jun 2010

    Scalability for Social Network Analysis Algorithms

    A Social network is a social structure made up of individuals called "Nodes" which are tied by "Edges". One example of a source for social network analysis is traffic in a mobile telephony network where the subscribers are 'Nodes' and the 'Edges' are derived from the telecom traffic in the...

    Provided By Uppsala University

  • White Papers // Mar 2009

    Routing of High-Priority Packets in Wireless Sensor Networks

    The Random Re-Routing (RRR) algorithm has recently been introduced to provide fast adaptive priority routing to rapidly convey packets of important events in sensor networks, while forwarding routine and lower priority traffic along some secondary network paths. This technique can be applied for sensor networks which monitor the environment by...

    Provided By Uppsala University

  • White Papers // Jan 2011

    A Large-Scale Testbed for Reproducible Ad Hoc Protocol Evaluations

    The authors have built an Ad hoc Protocol Evaluation testbed (APE) in order to perform large-scale, reproducible experiments. APE aims at assessing several different routing protocols in a real-world environment instead of by simulation. They present the APE testbed architecture and report on initial experiments with up to 37 physical...

    Provided By Uppsala University

  • White Papers // Aug 2010

    Is Tolerance Good Or Bad For Growth?

    The authors investigate to what extent tolerance, as measured by attitudes toward different types of neighbors, affects economic growth. Data from the World Values Survey enable one to investigate tolerance - growth relationships for 54 countries. They provide estimates based on cross-sectional as well as panel-data regressions. In addition they...

    Provided By Uppsala University

  • White Papers // Dec 2010

    Microfinance "Plus": The Impact Of Business Training On Indian Self Help Groups

    The provision of business training with microfinance leads to a positive impact on assets for the participating households. The authors correct for membership selection bias and account for potential training endogeneity with propensity score matching, using data from the Self Help Group microfinance program in India. The Self Help Group...

    Provided By Uppsala University

  • White Papers // Sep 2009

    Probabilistic Analysis of Hierarchical Cluster Protocols for Wireless Sensor Networks

    Wireless sensor networks are designed to extract data from the deployment environment and combine sensing, data processing and wireless communication to provide useful information for the network users. Hundreds or thousands of small embedded units, which operate under low-energy supply and with limited access to central network control, rely on...

    Provided By Uppsala University

  • White Papers // Jan 2011

    A Design Space Analysis of Internet Connectivity for Mobile Ad Hoc Networks

    The authors present a design space analysis of the problem of providing Internet connectivity for Mobile Ad hoc NETworks (MANETs). Currently there are a plethora of proposals to solve this problem in the research community. However, they argue that many of the existing designs suffer from complexity and design solutions...

    Provided By Uppsala University

  • White Papers // Jan 2011

    Mythbusters: Whatever You Thought About MANET Routing, Think Again. . .

    Protocol and system designs suffer from myths that may affect their nature and purpose as well as their features and capabilities. The authors investigate the myths surrounding Mobile Ad hoc NETworks (MANETs) and the impact of these myths on the ability to build robust, efficient and simple routing protocols. They...

    Provided By Uppsala University

  • White Papers // Feb 2009

    Key Technologies for IMT-Advanced Mobile Communication Systems

    WINNER is an ambitious research project aiming at identification, development and assessment of key technologies for IMT-Advanced mobile communication systems. WINNER has devised an OFDMA based system concept with excellent system level performance, for flexible deployments in a wide variety of operating conditions. The WINNER system provides a significant step...

    Provided By Uppsala University

  • White Papers // Sep 2011

    Exploring Sensor Network Communication Strategies With the Mote-in-the-Loop Approach

    The performance of wireless sensor networks is heavily influenced by the surrounding environment. Hence, in different scenarios different communication strategies, i.e., different packet sizes or retransmission strategies etc., are preferable. There are, however, currently no appropriate methods to investigate the optimal strategy. Analysis and simulation rely on abstract, often unrealistic...

    Provided By Uppsala University

  • White Papers // Sep 2010

    Energy-Efficient Task-Mapping for Data-Driven Sensor Network Macroprogramming Using Constraint Programming

    Using Constraint Programming (CP), the authors address the task-mapping problem in data-driven macroprogramming for Wireless Sensor Networks (WSNs). A task graph representing the flow of data among tasks assists the application developer in specifying the features of a WSN at a high level of abstraction. A problem that arises in...

    Provided By Uppsala University

  • White Papers // Apr 2009

    Managing Cross Layer Information in OMNeT++ Simulations

    This paper describes a general approach to dealing with cross layer information in OMNeT++-based network simulations. Rather than prescribe a specific cross layer architecture, this work is intended to address the software engineering problem of passing information between simulation modules in a sound way. An XML-based mechanism for passing information...

    Provided By Uppsala University

  • White Papers // May 2009

    Haggle: A Data-Centric Network Architecture for Mobile Devices

    Delay-tolerant and opportunistic networks relax the traditional assumption of end-to-end connectivity. Such networks are therefore suitable for content dissemination in sparsely connected regions of the world, and for complementing existing infrastructure by operating cost-free, high bandwidth, albeit high latency, content delivery services. In this paper, the authors argue, however, that...

    Provided By Uppsala University

  • White Papers // Jan 2011

    OFDMA Uplink Channel Predicion to Enable Frequency-Adaptive Multiuser Scheduling

    Frequency-adaptive multiuser scheduling utilizes the frequency-selective small-scale fading to allocate subcarriers with advantageous signal-to-noise ratio to each user. Due to channel time-variability and delays of the transmission control loop, this will in general require channel prediction. FDD (Frequency Division Duplex) uplinks pose the most challenging prediction problem: All sub-bands that...

    Provided By Uppsala University

  • White Papers // Jul 2010

    Wireless Sensor Network Deployment in Mobile Phones Assisted Environment

    Wireless sensor networks have been widely deployed to perform sensing constantly at specific locations, but their energy consumption and deployment cost are of great concern. With the popularity and advanced technologies of mobile phones, participatory urban sensing is a rising and promising field which utilizes mobile phones as mobile sensors...

    Provided By Uppsala University

  • White Papers // Jul 2011

    Cooperative State Estimation for Preserving Privacy of User Behaviors in Smart Grid

    Smart grid promises a reliable and secure electricity infrastructure to meet the future demand growth. However, the increase of data types and data amount from advanced smart grid introduce new privacy issues, which have to be resolved for customers. This paper presents a cooperative state estimation technique that protects the...

    Provided By Uppsala University

  • White Papers // Sep 2011

    RealProct: Reliable Protocol Conformance Testing With Real Nodes for Wireless Sensor Networks

    Despite the various applications of Wireless Sensor Network (WSN), experiences from real WSN deployments show that protocol implementations in sensor nodes are susceptible to software failures, which may cause network failures or even breakdown. Pre-deployment protocol conformance testing is essential to ensure reliable communications for WSNs. Unfortunately, existing solutions with...

    Provided By Uppsala University