Cardiff University

Displaying 1-29 of 29 results

  • White Papers // Sep 2012

    Local and Global Knowledge to Improve the Quality of Sensed Data

    Sensor networks are driven by the activities of their deployed environment and they have the potential to use data that has previously been sensed in order to classify current sensed data. In this paper, the authors propose the Knowledge-Based Hierarchical Architecture for Sensing (K-HAS), an architecture for Wireless Sensor Networks...

    Provided By Cardiff University

  • White Papers // Aug 2012

    SecureBPMN - A New Approach to Achieving Synergy Between Information Assurance & Security and Business Process Modelling

    The consideration of Information Assurance & Security (IAS) at the system requirements formulation and design stages has not yet become common practice. Although the importance of the security needs expression by nontechnical experts is intensively discussed, there is still no formalized way to execute this task. Business Process Modeling (BPM)...

    Provided By Cardiff University

  • White Papers // Jun 2011

    Monetary Aggregates, Financial Intermediate And The Business Cycle

    This paper explains and evaluates the transmissions and effectiveness of monetary policy shock in a simple Cash-In-Advance (CIA) economy with financial intermediates. Lucas-Fuerst's (1992) limited participation CIA models are able to explain decreasing nominal interest rates and increasing real economic activity with monetary expansion through limited participation monetary shock and...

    Provided By Cardiff University

  • White Papers // Jun 2011

    Can A Pure Real Business Cycle Model Explain The Real Exchange Rate: The Case Of Ukraine

    Real Exchange Rate (RER) is an important instrument for restoring sustainable economic growth in the small open economy with large export share. RER of Ukrainian currency can be explained within the Real Business Cycle (RBC) framework without any forms of nominal rigidities. Fitting Ukrainian quarterly data for the period of...

    Provided By Cardiff University

  • White Papers // Jun 2011

    Up Or Down? Capital Income Taxation In The United States And The United Kingdom

    Empirical evidence suggests that the Effective Marginal Tax Rate (EMTR) on income from capital has increased considerably in both the United States and the United Kingdom over the period 1982-2005. This evidence contradicts the corporate tax literature which predicts that the EMTR should instead fall over time as a result...

    Provided By Cardiff University

  • White Papers // May 2011

    Characteristics And Motives Of Socially Responsible Investors: Customer Behaviour Prospective

    The concept of being ethically and morally responsible, while investing, is not new to our ears. Ethically responsible investment has been in practice since the early civilization of mankind. The concept owes its emergence to the religious believers, values and practices towards investment. Though the practice of responsible investment, by...

    Provided By Cardiff University

  • White Papers // Apr 2011

    Fiscal Policy Multipliers In A New Keynesian Model Under Positive And Zero Nominal Interest Rate

    This paper uses a simple new-Keynesian model (with and without capital) and calculates multipliers of four types. That is, the authors assume either an increase in government spending or a cut in sales/labor/capital tax that is financed by lump-sum taxes (Ricardian evidence holds). They argue that multipliers of a temporary...

    Provided By Cardiff University

  • White Papers // Mar 2011

    Real Business Cycles With A Human Capital Investment Sector And Endogenous Growth: Persistence, Volatility And Labor Puzzles

    A positive joint two-sector productivity shock causes Rybczynski (1955) and Stolper and Samuelson (1941) effects that release leisure time and initially raises the relative price of human capital investment so as to favor it over goods production. This enables a basic RBC model, modified by having the household sector produce...

    Provided By Cardiff University

  • White Papers // Mar 2011

    Price-Level Targeting Versus Inflation Targeting Over The Long-Term

    This paper investigates the long-term impact of price-level targeting on social welfare in an overlapping generations model in which the young save for old age by investing in productive capital and indexed and nominal government bonds. A key feature of the model is that the extent of bond indexation is...

    Provided By Cardiff University

  • White Papers // Mar 2011

    Can The Fiscal Theory Of The Price Level Explain UK Inflation In The 1970s?

    The authors investigate whether the Fiscal Theory of the Price Level can explain UK inflation in the 1970s. They find that fiscal policy was non-ricardian and money growth entirely endogenous in this period. The implied model of inflation is tested in two ways: for its trend using cointegration analysis and...

    Provided By Cardiff University

  • White Papers // Jan 2011

    Reforms, Incentives, Welfare And Productivity Growth In Chinese Wheat Production

    Following the rural reform in 1978 a series of agricultural reforms were introduced in China with an aim to create incentives for the farmers to produce more. The nineties' price reform that was aimed at deregulating the agricultural market eventually resulted in a huge drop in agricultural production; this apparently...

    Provided By Cardiff University

  • White Papers // Nov 2010

    US Post-War Monetary Policy: What Caused The Great Moderation?

    Using indirect inference based on a VAR the authors confront US data from 1972 to 2007 with a standard New Keynesian model in which an optimal timeless policy is substituted for a Taylor rule. They find the model explains the data both for the Great Acceleration and the Great Moderation....

    Provided By Cardiff University

  • White Papers // Oct 2010

    Multicast Service Discovery Profiles for Deployment Within Dynamic Edge Networks

    Deploying survivable group-oriented applications and enterprise services across network infrastructures incorporating the use of mobile ad hoc edge networks is of interest in military communication scenarios. This requires a more flexible approach to service discovery than conventional solutions typically provide. In this paper, the authors discuss their service discovery design...

    Provided By Cardiff University

  • White Papers // Oct 2010

    On The Globalization Of Stock Markets: An Application Of VECM, SSA Technique And Mutual Information To The G7?

    This paper analyzes the process of stock market globalization on the basis of two different approaches: The linear one, based on co-integration tests and Vector Error Correction Models (VECM); and the nonlinear approach, based on Singular Spectrum Analysis (SSA) and mutual information tests. While the co-integration tests are based on...

    Provided By Cardiff University

  • White Papers // Sep 2010

    Inflation, Human Capital And Tobin's Q

    A less well-known empirical finding for the US and UK is a pronounced low frequency negative relationship between inflation and Tobin's q; a normalized market price of capital. This stylized fact is explained within a dynamic stochastic general equilibrium model using three key features: a Lucas and Prescott (1971) physical...

    Provided By Cardiff University

  • White Papers // Sep 2010

    The EMU Sovereign-Debt Crisis: Fundamentals, Expectations And Contagion

    The authors offer a detailed empirical investigation of the European sovereign debt crisis based on the theoretical model by Arghyrou and Tsoukalas (2010). They find evidence of a marked shift in market pricing behaviour from a 'Convergence-trade' model before August 2007 to one driven by macro-fundamentals and international risk thereafter....

    Provided By Cardiff University

  • White Papers // Apr 2010

    Social Cloud: Cloud Computing in Social Networks

    With the increasingly ubiquitous nature of Social networks and Cloud computing, users are starting to explore new ways to interact with, and exploit these developing paradigms. Social networks are used to reflect real world relationships that allow users to share information and form connections between one another, essentially creating dynamic...

    Provided By Cardiff University

  • White Papers // Apr 2010

    A Ontological Approach to Integrating Task Representations in Sensor Networks

    The sensor tasking problem in sensor networks involves the representation of users' tasks (user-level tasking) in a form which a sensor network needs to perform required operations (sensor-level tasking) leading to satisfaction of the tasks. The authors analyzed four approaches to Task Representation (TR) in sensor networks: the Open Geospatial...

    Provided By Cardiff University

  • White Papers // Apr 2010

    An Ontological Approach to Integrating Task Representations in Sensor Networks

    The sensor tasking problem in sensor networks involves the representation of users' tasks (user-level tasking) in a form which a sensor network needs to perform required operations (sensor-level tasking) leading to satisfaction of the tasks. The authors analyzed four approaches to Task Representation (TR) in sensor networks: the Open Geospatial...

    Provided By Cardiff University

  • White Papers // Apr 2010

    An exemplar data web integrating gene expression data on the fruit fly

    Integrating heterogeneous data across distributed sources is a major requirement for in silico bioinformatics supporting translational research. For example, genome-scale data on patterns of gene expression in the fruit fly Drosophila melanogaster are widely used in functional genomic studies in many organisms to inform candidate gene selection and validate experimental...

    Provided By Cardiff University

  • White Papers // Mar 2010

    Revenue-Based Resource Management on Shared Clouds for Heterogenous Bursty Data Streams

    When data from multiple sources (sensors) are processed over a shared distributed computing infrastructure, it is necessary to often provide some Quality of Service (QoS) guarantees to each data stream. Service Level Agreements (SLAs) identify the cost that a user must pay to achieve the required QoS, and a penalty...

    Provided By Cardiff University

  • White Papers // Mar 2010

    Development Framework for Supporting Java NS2 Routing Protocols

    This paper presents a framework for developing and executing Java routing protocol implementations within the network simulator NS2. NS2 provides extensive support for developing C++ routing protocols, but has no Java support. This paper describes extensions the authors have made to the AgentJ toolkit that enable routing protocols to be...

    Provided By Cardiff University

  • White Papers // Jul 2009

    A Review and Comparison of Data Visualization Techniques in Building Design and in Building Simulation

    This paper will present a review, for a range of building design and performance issues, of the visualization language used in building design and in building simulation, and identify the overlaps and divergences in their use. There is a plethora of techniques available ranging from textual data to graphical representation,...

    Provided By Cardiff University

  • White Papers // Apr 2009

    Virtual Teams: Wikis and Other Collaboration Tools

    The purpose of this paper is to provide an overview of strengths and weaknesses of wikis as a tool for collaboration. First authors introduce the concept of wikis. Next authors provide a brief overview of technical characteristics of wikis. They compare wikis to other collaboration tools paying particular attention to...

    Provided By Cardiff University

  • White Papers // Jan 2009

    On the Application of Data Mining to Official Data

    Retrieving valuable knowledge and statistical patterns from official data has a great potential in supporting strategic policy making. Data Mining (DM) techniques are well-known for providing flexible and efficient analytical tools for data processing. In this paper, the authors' provide an introduction to applications of DM to official statistics and...

    Provided By Cardiff University

  • White Papers // Nov 2008

    How Open Source Software and Wireless Networks are Transforming Two Cultures: An Investigation in Urban North America and Rural Africa

    This paper explores how open source software and wireless networks enable digital inclusion in the United States and Africa. The authors begin by measuring the digital divide in these very different regions of the world. Their research demonstrates, both quantitatively and qualitatively, how the digital divide places populations in both...

    Provided By Cardiff University

  • White Papers // Nov 2008

    US Volatility Cycles Of Output And Inflation, 1919-2004: A Money And Banking Approach To A Puzzle

    The post-1983 moderation coincided with an historical divergence in the money aggregate growth and velocity volatilities away from the downward trending GDP and inflation volatilities. Using an endogenous growth monetary DSGE model, with micro-based banking production, enables a contrasting characterization of the two great volatility cycles over the historical period...

    Provided By Cardiff University

  • White Papers // Jul 2008

    Low-Power Humidity Sensor for RFID Applications

    Wireless sensors incorporated in RFID systems are important in several industrial, consumer and logistics applications. By extending RFID tags to sensing applications, the products become smarter. Application areas for these smart tags include; health care (verification of the environmental conditions during transport or in storage of e.g. diapers, bandages, etc.),...

    Provided By Cardiff University

  • White Papers // May 2008

    Network-Aware Peer-to-Peer Based Grid Inter-Domain Scheduling

    Grid technologies have enabled the aggregation of geographically distributed resources, in the context of a particular application. The network remains an important requirement for any Grid application, as entities involved in a Grid system (such as users, services, and data) need to communicate with each other over a network. The...

    Provided By Cardiff University

  • White Papers // Aug 2012

    SecureBPMN - A New Approach to Achieving Synergy Between Information Assurance & Security and Business Process Modelling

    The consideration of Information Assurance & Security (IAS) at the system requirements formulation and design stages has not yet become common practice. Although the importance of the security needs expression by nontechnical experts is intensively discussed, there is still no formalized way to execute this task. Business Process Modeling (BPM)...

    Provided By Cardiff University

  • White Papers // Mar 2010

    Revenue-Based Resource Management on Shared Clouds for Heterogenous Bursty Data Streams

    When data from multiple sources (sensors) are processed over a shared distributed computing infrastructure, it is necessary to often provide some Quality of Service (QoS) guarantees to each data stream. Service Level Agreements (SLAs) identify the cost that a user must pay to achieve the required QoS, and a penalty...

    Provided By Cardiff University

  • White Papers // Jul 2008

    Low-Power Humidity Sensor for RFID Applications

    Wireless sensors incorporated in RFID systems are important in several industrial, consumer and logistics applications. By extending RFID tags to sensing applications, the products become smarter. Application areas for these smart tags include; health care (verification of the environmental conditions during transport or in storage of e.g. diapers, bandages, etc.),...

    Provided By Cardiff University

  • White Papers // Jul 2009

    A Review and Comparison of Data Visualization Techniques in Building Design and in Building Simulation

    This paper will present a review, for a range of building design and performance issues, of the visualization language used in building design and in building simulation, and identify the overlaps and divergences in their use. There is a plethora of techniques available ranging from textual data to graphical representation,...

    Provided By Cardiff University

  • White Papers // Apr 2009

    Virtual Teams: Wikis and Other Collaboration Tools

    The purpose of this paper is to provide an overview of strengths and weaknesses of wikis as a tool for collaboration. First authors introduce the concept of wikis. Next authors provide a brief overview of technical characteristics of wikis. They compare wikis to other collaboration tools paying particular attention to...

    Provided By Cardiff University

  • White Papers // Mar 2010

    Development Framework for Supporting Java NS2 Routing Protocols

    This paper presents a framework for developing and executing Java routing protocol implementations within the network simulator NS2. NS2 provides extensive support for developing C++ routing protocols, but has no Java support. This paper describes extensions the authors have made to the AgentJ toolkit that enable routing protocols to be...

    Provided By Cardiff University

  • White Papers // Apr 2010

    Social Cloud: Cloud Computing in Social Networks

    With the increasingly ubiquitous nature of Social networks and Cloud computing, users are starting to explore new ways to interact with, and exploit these developing paradigms. Social networks are used to reflect real world relationships that allow users to share information and form connections between one another, essentially creating dynamic...

    Provided By Cardiff University

  • White Papers // Jan 2009

    On the Application of Data Mining to Official Data

    Retrieving valuable knowledge and statistical patterns from official data has a great potential in supporting strategic policy making. Data Mining (DM) techniques are well-known for providing flexible and efficient analytical tools for data processing. In this paper, the authors' provide an introduction to applications of DM to official statistics and...

    Provided By Cardiff University

  • White Papers // Apr 2010

    An exemplar data web integrating gene expression data on the fruit fly

    Integrating heterogeneous data across distributed sources is a major requirement for in silico bioinformatics supporting translational research. For example, genome-scale data on patterns of gene expression in the fruit fly Drosophila melanogaster are widely used in functional genomic studies in many organisms to inform candidate gene selection and validate experimental...

    Provided By Cardiff University

  • White Papers // Oct 2010

    On The Globalization Of Stock Markets: An Application Of VECM, SSA Technique And Mutual Information To The G7?

    This paper analyzes the process of stock market globalization on the basis of two different approaches: The linear one, based on co-integration tests and Vector Error Correction Models (VECM); and the nonlinear approach, based on Singular Spectrum Analysis (SSA) and mutual information tests. While the co-integration tests are based on...

    Provided By Cardiff University

  • White Papers // Sep 2010

    Inflation, Human Capital And Tobin's Q

    A less well-known empirical finding for the US and UK is a pronounced low frequency negative relationship between inflation and Tobin's q; a normalized market price of capital. This stylized fact is explained within a dynamic stochastic general equilibrium model using three key features: a Lucas and Prescott (1971) physical...

    Provided By Cardiff University

  • White Papers // Jun 2011

    Monetary Aggregates, Financial Intermediate And The Business Cycle

    This paper explains and evaluates the transmissions and effectiveness of monetary policy shock in a simple Cash-In-Advance (CIA) economy with financial intermediates. Lucas-Fuerst's (1992) limited participation CIA models are able to explain decreasing nominal interest rates and increasing real economic activity with monetary expansion through limited participation monetary shock and...

    Provided By Cardiff University

  • White Papers // Sep 2010

    The EMU Sovereign-Debt Crisis: Fundamentals, Expectations And Contagion

    The authors offer a detailed empirical investigation of the European sovereign debt crisis based on the theoretical model by Arghyrou and Tsoukalas (2010). They find evidence of a marked shift in market pricing behaviour from a 'Convergence-trade' model before August 2007 to one driven by macro-fundamentals and international risk thereafter....

    Provided By Cardiff University

  • White Papers // Apr 2011

    Fiscal Policy Multipliers In A New Keynesian Model Under Positive And Zero Nominal Interest Rate

    This paper uses a simple new-Keynesian model (with and without capital) and calculates multipliers of four types. That is, the authors assume either an increase in government spending or a cut in sales/labor/capital tax that is financed by lump-sum taxes (Ricardian evidence holds). They argue that multipliers of a temporary...

    Provided By Cardiff University

  • White Papers // Nov 2010

    US Post-War Monetary Policy: What Caused The Great Moderation?

    Using indirect inference based on a VAR the authors confront US data from 1972 to 2007 with a standard New Keynesian model in which an optimal timeless policy is substituted for a Taylor rule. They find the model explains the data both for the Great Acceleration and the Great Moderation....

    Provided By Cardiff University

  • White Papers // Apr 2010

    A Ontological Approach to Integrating Task Representations in Sensor Networks

    The sensor tasking problem in sensor networks involves the representation of users' tasks (user-level tasking) in a form which a sensor network needs to perform required operations (sensor-level tasking) leading to satisfaction of the tasks. The authors analyzed four approaches to Task Representation (TR) in sensor networks: the Open Geospatial...

    Provided By Cardiff University

  • White Papers // Oct 2010

    Multicast Service Discovery Profiles for Deployment Within Dynamic Edge Networks

    Deploying survivable group-oriented applications and enterprise services across network infrastructures incorporating the use of mobile ad hoc edge networks is of interest in military communication scenarios. This requires a more flexible approach to service discovery than conventional solutions typically provide. In this paper, the authors discuss their service discovery design...

    Provided By Cardiff University

  • White Papers // Nov 2008

    How Open Source Software and Wireless Networks are Transforming Two Cultures: An Investigation in Urban North America and Rural Africa

    This paper explores how open source software and wireless networks enable digital inclusion in the United States and Africa. The authors begin by measuring the digital divide in these very different regions of the world. Their research demonstrates, both quantitatively and qualitatively, how the digital divide places populations in both...

    Provided By Cardiff University

  • White Papers // Sep 2012

    Local and Global Knowledge to Improve the Quality of Sensed Data

    Sensor networks are driven by the activities of their deployed environment and they have the potential to use data that has previously been sensed in order to classify current sensed data. In this paper, the authors propose the Knowledge-Based Hierarchical Architecture for Sensing (K-HAS), an architecture for Wireless Sensor Networks...

    Provided By Cardiff University

  • White Papers // May 2008

    Network-Aware Peer-to-Peer Based Grid Inter-Domain Scheduling

    Grid technologies have enabled the aggregation of geographically distributed resources, in the context of a particular application. The network remains an important requirement for any Grid application, as entities involved in a Grid system (such as users, services, and data) need to communicate with each other over a network. The...

    Provided By Cardiff University

  • White Papers // Jun 2011

    Can A Pure Real Business Cycle Model Explain The Real Exchange Rate: The Case Of Ukraine

    Real Exchange Rate (RER) is an important instrument for restoring sustainable economic growth in the small open economy with large export share. RER of Ukrainian currency can be explained within the Real Business Cycle (RBC) framework without any forms of nominal rigidities. Fitting Ukrainian quarterly data for the period of...

    Provided By Cardiff University

  • White Papers // Mar 2011

    Real Business Cycles With A Human Capital Investment Sector And Endogenous Growth: Persistence, Volatility And Labor Puzzles

    A positive joint two-sector productivity shock causes Rybczynski (1955) and Stolper and Samuelson (1941) effects that release leisure time and initially raises the relative price of human capital investment so as to favor it over goods production. This enables a basic RBC model, modified by having the household sector produce...

    Provided By Cardiff University

  • White Papers // Mar 2011

    Price-Level Targeting Versus Inflation Targeting Over The Long-Term

    This paper investigates the long-term impact of price-level targeting on social welfare in an overlapping generations model in which the young save for old age by investing in productive capital and indexed and nominal government bonds. A key feature of the model is that the extent of bond indexation is...

    Provided By Cardiff University

  • White Papers // Jan 2011

    Reforms, Incentives, Welfare And Productivity Growth In Chinese Wheat Production

    Following the rural reform in 1978 a series of agricultural reforms were introduced in China with an aim to create incentives for the farmers to produce more. The nineties' price reform that was aimed at deregulating the agricultural market eventually resulted in a huge drop in agricultural production; this apparently...

    Provided By Cardiff University

  • White Papers // Nov 2008

    US Volatility Cycles Of Output And Inflation, 1919-2004: A Money And Banking Approach To A Puzzle

    The post-1983 moderation coincided with an historical divergence in the money aggregate growth and velocity volatilities away from the downward trending GDP and inflation volatilities. Using an endogenous growth monetary DSGE model, with micro-based banking production, enables a contrasting characterization of the two great volatility cycles over the historical period...

    Provided By Cardiff University

  • White Papers // Mar 2011

    Can The Fiscal Theory Of The Price Level Explain UK Inflation In The 1970s?

    The authors investigate whether the Fiscal Theory of the Price Level can explain UK inflation in the 1970s. They find that fiscal policy was non-ricardian and money growth entirely endogenous in this period. The implied model of inflation is tested in two ways: for its trend using cointegration analysis and...

    Provided By Cardiff University

  • White Papers // Apr 2010

    An Ontological Approach to Integrating Task Representations in Sensor Networks

    The sensor tasking problem in sensor networks involves the representation of users' tasks (user-level tasking) in a form which a sensor network needs to perform required operations (sensor-level tasking) leading to satisfaction of the tasks. The authors analyzed four approaches to Task Representation (TR) in sensor networks: the Open Geospatial...

    Provided By Cardiff University

  • White Papers // Jun 2011

    Up Or Down? Capital Income Taxation In The United States And The United Kingdom

    Empirical evidence suggests that the Effective Marginal Tax Rate (EMTR) on income from capital has increased considerably in both the United States and the United Kingdom over the period 1982-2005. This evidence contradicts the corporate tax literature which predicts that the EMTR should instead fall over time as a result...

    Provided By Cardiff University

  • White Papers // May 2011

    Characteristics And Motives Of Socially Responsible Investors: Customer Behaviour Prospective

    The concept of being ethically and morally responsible, while investing, is not new to our ears. Ethically responsible investment has been in practice since the early civilization of mankind. The concept owes its emergence to the religious believers, values and practices towards investment. Though the practice of responsible investment, by...

    Provided By Cardiff University