Technical University of Lisbon

Displaying 1-26 of 26 results

  • White Papers // Jan 2012

    Designing Reconfigurable Multi-Standard Analog Baseband Front-End for 4G Mobile Terminals: System Level Design

    This paper presents the system-level design of a wireless receiver's analog baseband front-end, which satisfies the standards of 4G mobile communications. An analysis of different topologies for wireless receivers suited for multi-standard purposes is performed. The Zero-IF architecture is chosen and design issues of analog baseband blocks are outlined, regarding...

    Provided By Technical University of Lisbon

  • White Papers // Jun 2011

    Byzantine Fault-Tolerant Transaction Processing for Replicated Databases

    Transaction commit is a problem much investigated, both in the databases and systems communities, from the theoretical and practical sides. The authors present a modular approach to solve this problem in the context of database replication on environments that are subject to Byzantine faults. The protocol builds on a total...

    Provided By Technical University of Lisbon

  • White Papers // Apr 2011

    Management of Access Control in Information System Based on Role Concept

    Development of technology, progress and increase of information flow has the impact also on the development of enterprises and require rapid changes in their information systems. The growth and complexity of functionality that they currently should face cause that their design and realization become the difficult tasks and strategic for...

    Provided By Technical University of Lisbon

  • White Papers // Mar 2011

    Fiscal Developments And Financial Stress: A Threshold VAR Analysis

    The authors use a threshold VAR analysis to study whether the effects of fiscal policy on economic activity differ depending on financial market conditions. In particular, they investigate the possibility of a non-linear propagation of fiscal developments according to different financial market stress regimes. More specifically they employ a quarterly...

    Provided By Technical University of Lisbon

  • White Papers // Feb 2011

    A Generic Service Interface for Cloud Networks

    Two major challenges for enabling the vision of cloud computing regard the generic and multi-purpose access to (virtualised) resources, and the flexible, dynamic, and on-demand composition of services from virtual resources; from the service level, all the way "Down" to the lamda level. Both aspects require a respective flexibility and...

    Provided By Technical University of Lisbon

  • White Papers // Nov 2010

    Financial Integration In European Countries: Some Panel Evidence

    This paper provides empirical evidence of the financial integration of some developed countries, mostly in the European Union, covering the period between 1961 and 2008. The main contributions are to be found first, in the application of panel estimates and test statistics. particularly of some recently developed tests like the...

    Provided By Technical University of Lisbon

  • White Papers // Nov 2010

    Do Fiscal Imbalances Deteriorate Sovereign Debt Ratings?

    The authors use sovereign debt rating estimations from Afonso, Gomes and Rother (2009, 2010) for Fitch, Moody's, and Standard & Poor's, to assess to what extent the recent fiscal imbalances are being reflected on the sovereign debt notations. They use macro and fiscal data up to 2009, and macro and...

    Provided By Technical University of Lisbon

  • White Papers // Oct 2010

    The Spatial Dimension In FDI Spillovers: Evidence At The Regional Level From Portugal

    There are theoretical reasons to expect that benefits to domestic firms from Foreign Direct Investment would be confined to the area where the multinational firm is located and that the benefits depend on the development level of the host region. However, there is a scarcity of empirical studies on FDI's...

    Provided By Technical University of Lisbon

  • White Papers // Jul 2010

    Secrecy-Oriented First-Order Logical Analysis of Cryptographic Protocols

    The authors present a computationally sound first-order system for security-analysis of protocols that places secrecy of nonces and keys in its center. Even trace properties such as agreement and authentication are proven via proving a non-trace property, namely, secrecy first with an inductive method. This results a very powerful system,...

    Provided By Technical University of Lisbon

  • White Papers // May 2010

    Factor Intensities And Transitional Dynamics In Three-Sector Endogenous Growth Models

    The authors characterize transitional dynamics in three-sector endogenous growth models without externalities, by presenting a complete taxonomy based upon the algebraic properties of the matrix of factor intensities. Their analysis allows one to relate the algebraic properties of the coefficient matrix with higher dimensional generalizations of the Stolper-Samuelson and Rybczynski...

    Provided By Technical University of Lisbon

  • White Papers // Dec 2009

    Robust Cooperative Spectrum Sensing for Disaster Relief Networks in Correlated Environments

    Disaster relief networks are designed to be adaptable and resilient so to encompass the demands of the emergency service. Cognitive Radio enhanced ad-hoc architecture has been put forward as a candidate to enable such networks. Spectrum sensing, the cornerstone of the Cognitive Radio paradigm, has been the focus of intensive...

    Provided By Technical University of Lisbon

  • White Papers // Oct 2009

    Interrelationships Between Human Capital And Social Capital In Small And Medium Sized Firms: The Effect Of Age And Sector Of Activity

    This paper explores the interconnection between human factors and social factors and analyses the relations influenced by the specific activity and age of firms. A statistical approach is implemented which applies factor analysis techniques, based on a sample of small and medium sized firms from four sectors of activity which...

    Provided By Technical University of Lisbon

  • White Papers // Aug 2009

    Growth, Fiscal Policy And The Informal Sector In A Small Open Economy

    The authors discuss the implications of informality on growth and fiscal policy by considering an informal sector based on low tech firms, in an open economy model of endogenous growth, where labor supply is elastic and increasing returns arise from public spending. They allow for both labor and capital to...

    Provided By Technical University of Lisbon

  • White Papers // Jul 2009

    Local And Global Indeterminacy In Two-Sector Models Of Endogenous Growth

    In this paper the authors consider a two-sector endogenous growth model where the productions of the final good and human capital require economy-wide external effects. Assuming constant returns to scale at the private and social levels, they show that local and global indeterminacy of equilibrium paths are compatible with any...

    Provided By Technical University of Lisbon

  • White Papers // Apr 2009

    The European Credit Market And Institutions

    This paper uses polled panel OLS robust estimations with quarterly data for 26 EU countries from the 1980s until 2006, comparing the results of three panels of countries during different time periods. The results obtained confirm the high degree of integration among the EU financial systems and demonstrate not only...

    Provided By Technical University of Lisbon

  • White Papers // Apr 2009

    Home Country Bias: Does Domestic Experience Help Investors Enter Foreign Markets?

    This paper investigates whether investors' domestic experience helps them enter foreign markets. The authors show that investors first invest in domestic securities and only some time later they invest abroad in foreign securities. They also show that investors who trade more often in the domestic market start to invest abroad...

    Provided By Technical University of Lisbon

  • White Papers // Apr 2009

    Analysis of WiMAX Data Rate Performance

    Mobile WiMAX has gained momentum as a top candidate to deliver the dream of full mobile wireless internet. In spite of this, the available data regarding the performance of Mobile WiMAX in real world scenarios is still scarce. In this paper, the available DownLink (DL) throughput as a function of...

    Provided By Technical University of Lisbon

  • White Papers // Apr 2009

    Multimedia Data Transport for Wireless Sensor Networks

    This paper presents the study and implementation of a reliable transport protocol for wireless multimedia sensor networks. The paper was based on an existing transport protocol for sensor networks, the DTSN ("Distributed Transport for Sensor Networks") developed at Inesc within projects IST FP6 UbiSec&Sens, EuroFGI and FP7 EuroNF. For multimedia...

    Provided By Technical University of Lisbon

  • White Papers // Feb 2009

    Market Solutions In Poverty: The Role Of Microcredit In Development Countries With Financial Restrictions

    The creation of credit markets in poor countries is a crucial factor for their development. If well put into practice, people would be able to improve their quality of life. With the suitable support they will become educated and that will allow them to enlarge their business, to think by...

    Provided By Technical University of Lisbon

  • White Papers // Jan 2009

    The Credit Channel Transmission Of Monetary Policy In The European Union

    This paper confirms the importance of the financial systems behaviour conditions to the credit channel of monetary policy in the entire European Union (EU). It uses panel fixed-effect estimations and quarterly data for 26 EU countries for the period from Q1 1999 to Q3 2006 in an adaptation of the...

    Provided By Technical University of Lisbon

  • White Papers // Jan 2009

    European Integration And The Credit Channel Transmission Of Monetary Policy

    Using pooled panel OLS estimations and dynamic Arellano-Bond GMM estimations with quarterly data for 26 EU countries for the period from Q1 1999 to Q3 2006 this paper confirms the high degree of integration between the EU financial systems, as well as the importance of bank performance conditions to the...

    Provided By Technical University of Lisbon

  • White Papers // Jan 2009

    The Macroeconomic Effects Of Fiscal Policy In Portugal: A Bayesian SVAR Analysis

    In the last twenty years Portugal struggled to keep public finances under control, notably in containing primary spending. The authors use a new quarterly dataset covering 1979:1-2007:4, and estimate a Bayesian Structural Autoregression model to analyze the macroeconomic effects of fiscal policy. The results show that positive government spending shocks,...

    Provided By Technical University of Lisbon

  • White Papers // Oct 2008

    Intergovernmental Grant Rules, The "Golden Rule" Of Public Finance And Local Expenditures

    The Stability and Growth Pact and the process of fiscal consolidation in several European countries have enhanced the role of fiscal rules at sub-national level. This paper analyzes the combined effect of a rule to allocate capital and current block grants to local governments and the "Golden rule" of public...

    Provided By Technical University of Lisbon

  • White Papers // Oct 2008

    Fiscal Policy Responsiveness, Persistence And Discretion

    The authors decompose fiscal policy in three components: responsiveness, persistence and discretion. Using a sample of 132 countries, their results point out that fiscal policy tends to be more persistent than to respond to output conditions. They also found that while the effect of cross-country covariates is positive (negative) for...

    Provided By Technical University of Lisbon

  • White Papers // Sep 2008

    Identification of Feature Denial of Services

    Internet applications, such as Email, VoIP and WWW, have been enhanced with many features. However, the introduction and modification of features may result in undesired behaviors, and this effect is known as feature interaction-FI. FI resolution may be implemented by a Feature Manager, which is directed by a set of...

    Provided By Technical University of Lisbon

  • White Papers // Mar 2008

    Using Process Mining for ITIL Assessment: A Case Study With Incident Management

    The ITIL framework is the best known set of best practices for managing IT services. In this paper the authors introduce process mining as a useful technique for assessing whether a business process is implemented according to ITIL guidelines. The authors evaluated the approach using a real-world case study in...

    Provided By Technical University of Lisbon

  • White Papers // Mar 2011

    Fiscal Developments And Financial Stress: A Threshold VAR Analysis

    The authors use a threshold VAR analysis to study whether the effects of fiscal policy on economic activity differ depending on financial market conditions. In particular, they investigate the possibility of a non-linear propagation of fiscal developments according to different financial market stress regimes. More specifically they employ a quarterly...

    Provided By Technical University of Lisbon

  • White Papers // Nov 2010

    Financial Integration In European Countries: Some Panel Evidence

    This paper provides empirical evidence of the financial integration of some developed countries, mostly in the European Union, covering the period between 1961 and 2008. The main contributions are to be found first, in the application of panel estimates and test statistics. particularly of some recently developed tests like the...

    Provided By Technical University of Lisbon

  • White Papers // Apr 2009

    Home Country Bias: Does Domestic Experience Help Investors Enter Foreign Markets?

    This paper investigates whether investors' domestic experience helps them enter foreign markets. The authors show that investors first invest in domestic securities and only some time later they invest abroad in foreign securities. They also show that investors who trade more often in the domestic market start to invest abroad...

    Provided By Technical University of Lisbon

  • White Papers // Apr 2009

    The European Credit Market And Institutions

    This paper uses polled panel OLS robust estimations with quarterly data for 26 EU countries from the 1980s until 2006, comparing the results of three panels of countries during different time periods. The results obtained confirm the high degree of integration among the EU financial systems and demonstrate not only...

    Provided By Technical University of Lisbon

  • White Papers // Feb 2009

    Market Solutions In Poverty: The Role Of Microcredit In Development Countries With Financial Restrictions

    The creation of credit markets in poor countries is a crucial factor for their development. If well put into practice, people would be able to improve their quality of life. With the suitable support they will become educated and that will allow them to enlarge their business, to think by...

    Provided By Technical University of Lisbon

  • White Papers // Jan 2009

    The Macroeconomic Effects Of Fiscal Policy In Portugal: A Bayesian SVAR Analysis

    In the last twenty years Portugal struggled to keep public finances under control, notably in containing primary spending. The authors use a new quarterly dataset covering 1979:1-2007:4, and estimate a Bayesian Structural Autoregression model to analyze the macroeconomic effects of fiscal policy. The results show that positive government spending shocks,...

    Provided By Technical University of Lisbon

  • White Papers // Oct 2008

    Intergovernmental Grant Rules, The "Golden Rule" Of Public Finance And Local Expenditures

    The Stability and Growth Pact and the process of fiscal consolidation in several European countries have enhanced the role of fiscal rules at sub-national level. This paper analyzes the combined effect of a rule to allocate capital and current block grants to local governments and the "Golden rule" of public...

    Provided By Technical University of Lisbon

  • White Papers // Oct 2008

    Fiscal Policy Responsiveness, Persistence And Discretion

    The authors decompose fiscal policy in three components: responsiveness, persistence and discretion. Using a sample of 132 countries, their results point out that fiscal policy tends to be more persistent than to respond to output conditions. They also found that while the effect of cross-country covariates is positive (negative) for...

    Provided By Technical University of Lisbon

  • White Papers // Nov 2010

    Do Fiscal Imbalances Deteriorate Sovereign Debt Ratings?

    The authors use sovereign debt rating estimations from Afonso, Gomes and Rother (2009, 2010) for Fitch, Moody's, and Standard & Poor's, to assess to what extent the recent fiscal imbalances are being reflected on the sovereign debt notations. They use macro and fiscal data up to 2009, and macro and...

    Provided By Technical University of Lisbon

  • White Papers // Apr 2009

    Multimedia Data Transport for Wireless Sensor Networks

    This paper presents the study and implementation of a reliable transport protocol for wireless multimedia sensor networks. The paper was based on an existing transport protocol for sensor networks, the DTSN ("Distributed Transport for Sensor Networks") developed at Inesc within projects IST FP6 UbiSec&Sens, EuroFGI and FP7 EuroNF. For multimedia...

    Provided By Technical University of Lisbon

  • White Papers // Feb 2011

    A Generic Service Interface for Cloud Networks

    Two major challenges for enabling the vision of cloud computing regard the generic and multi-purpose access to (virtualised) resources, and the flexible, dynamic, and on-demand composition of services from virtual resources; from the service level, all the way "Down" to the lamda level. Both aspects require a respective flexibility and...

    Provided By Technical University of Lisbon

  • White Papers // Jan 2012

    Designing Reconfigurable Multi-Standard Analog Baseband Front-End for 4G Mobile Terminals: System Level Design

    This paper presents the system-level design of a wireless receiver's analog baseband front-end, which satisfies the standards of 4G mobile communications. An analysis of different topologies for wireless receivers suited for multi-standard purposes is performed. The Zero-IF architecture is chosen and design issues of analog baseband blocks are outlined, regarding...

    Provided By Technical University of Lisbon

  • White Papers // Apr 2011

    Management of Access Control in Information System Based on Role Concept

    Development of technology, progress and increase of information flow has the impact also on the development of enterprises and require rapid changes in their information systems. The growth and complexity of functionality that they currently should face cause that their design and realization become the difficult tasks and strategic for...

    Provided By Technical University of Lisbon

  • White Papers // Apr 2009

    Analysis of WiMAX Data Rate Performance

    Mobile WiMAX has gained momentum as a top candidate to deliver the dream of full mobile wireless internet. In spite of this, the available data regarding the performance of Mobile WiMAX in real world scenarios is still scarce. In this paper, the available DownLink (DL) throughput as a function of...

    Provided By Technical University of Lisbon

  • White Papers // Sep 2008

    Identification of Feature Denial of Services

    Internet applications, such as Email, VoIP and WWW, have been enhanced with many features. However, the introduction and modification of features may result in undesired behaviors, and this effect is known as feature interaction-FI. FI resolution may be implemented by a Feature Manager, which is directed by a set of...

    Provided By Technical University of Lisbon

  • White Papers // Mar 2008

    Using Process Mining for ITIL Assessment: A Case Study With Incident Management

    The ITIL framework is the best known set of best practices for managing IT services. In this paper the authors introduce process mining as a useful technique for assessing whether a business process is implemented according to ITIL guidelines. The authors evaluated the approach using a real-world case study in...

    Provided By Technical University of Lisbon

  • White Papers // Oct 2009

    Interrelationships Between Human Capital And Social Capital In Small And Medium Sized Firms: The Effect Of Age And Sector Of Activity

    This paper explores the interconnection between human factors and social factors and analyses the relations influenced by the specific activity and age of firms. A statistical approach is implemented which applies factor analysis techniques, based on a sample of small and medium sized firms from four sectors of activity which...

    Provided By Technical University of Lisbon

  • White Papers // Aug 2009

    Growth, Fiscal Policy And The Informal Sector In A Small Open Economy

    The authors discuss the implications of informality on growth and fiscal policy by considering an informal sector based on low tech firms, in an open economy model of endogenous growth, where labor supply is elastic and increasing returns arise from public spending. They allow for both labor and capital to...

    Provided By Technical University of Lisbon

  • White Papers // Jul 2009

    Local And Global Indeterminacy In Two-Sector Models Of Endogenous Growth

    In this paper the authors consider a two-sector endogenous growth model where the productions of the final good and human capital require economy-wide external effects. Assuming constant returns to scale at the private and social levels, they show that local and global indeterminacy of equilibrium paths are compatible with any...

    Provided By Technical University of Lisbon

  • White Papers // Jul 2010

    Secrecy-Oriented First-Order Logical Analysis of Cryptographic Protocols

    The authors present a computationally sound first-order system for security-analysis of protocols that places secrecy of nonces and keys in its center. Even trace properties such as agreement and authentication are proven via proving a non-trace property, namely, secrecy first with an inductive method. This results a very powerful system,...

    Provided By Technical University of Lisbon

  • White Papers // Dec 2009

    Robust Cooperative Spectrum Sensing for Disaster Relief Networks in Correlated Environments

    Disaster relief networks are designed to be adaptable and resilient so to encompass the demands of the emergency service. Cognitive Radio enhanced ad-hoc architecture has been put forward as a candidate to enable such networks. Spectrum sensing, the cornerstone of the Cognitive Radio paradigm, has been the focus of intensive...

    Provided By Technical University of Lisbon

  • White Papers // May 2010

    Factor Intensities And Transitional Dynamics In Three-Sector Endogenous Growth Models

    The authors characterize transitional dynamics in three-sector endogenous growth models without externalities, by presenting a complete taxonomy based upon the algebraic properties of the matrix of factor intensities. Their analysis allows one to relate the algebraic properties of the coefficient matrix with higher dimensional generalizations of the Stolper-Samuelson and Rybczynski...

    Provided By Technical University of Lisbon

  • White Papers // Oct 2010

    The Spatial Dimension In FDI Spillovers: Evidence At The Regional Level From Portugal

    There are theoretical reasons to expect that benefits to domestic firms from Foreign Direct Investment would be confined to the area where the multinational firm is located and that the benefits depend on the development level of the host region. However, there is a scarcity of empirical studies on FDI's...

    Provided By Technical University of Lisbon

  • White Papers // Jun 2011

    Byzantine Fault-Tolerant Transaction Processing for Replicated Databases

    Transaction commit is a problem much investigated, both in the databases and systems communities, from the theoretical and practical sides. The authors present a modular approach to solve this problem in the context of database replication on environments that are subject to Byzantine faults. The protocol builds on a total...

    Provided By Technical University of Lisbon

  • White Papers // Jan 2009

    The Credit Channel Transmission Of Monetary Policy In The European Union

    This paper confirms the importance of the financial systems behaviour conditions to the credit channel of monetary policy in the entire European Union (EU). It uses panel fixed-effect estimations and quarterly data for 26 EU countries for the period from Q1 1999 to Q3 2006 in an adaptation of the...

    Provided By Technical University of Lisbon

  • White Papers // Jan 2009

    European Integration And The Credit Channel Transmission Of Monetary Policy

    Using pooled panel OLS estimations and dynamic Arellano-Bond GMM estimations with quarterly data for 26 EU countries for the period from Q1 1999 to Q3 2006 this paper confirms the high degree of integration between the EU financial systems, as well as the importance of bank performance conditions to the...

    Provided By Technical University of Lisbon