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University of Porto
(16 results)-
White Papers
An Implementation of IP Over UMTS With QoS
January 1, 2010, 12:00am PST
The IST ARROWS (Advanced Radio Resource Management for Wireless Services) project aims at providing Radio Resource Management (RRM) and Quality of Service (QoS) management solutions for the...
Provided by University of Porto
-
White Papers
Open Standards and Open Source: Enabling Interoperability
January 1, 2011, 12:00am PST
Interoperability is a major requirement for industries and governments in a society that increasingly moves towards global collaboration and integration. Open standards built on the principles of...
Provided by University of Porto
-
White Papers
Re-Evaluating The Impact Of Natural Resources On Economic Growth
June 1, 2008, 12:00am PDT
In this paper the authors re-evaluate the impact of natural resources on economic growth. The reassessment is based on a growth model where, using panel-data analysis, natural-resource variables...
Provided by University of Porto
-
White Papers
Technological-Knowledge Dynamics In Lab-Equipment Models Of Quality Ladders
July 1, 2008, 12:00am PDT
The Perpetual Inventory Model (PIM) assumes that, in each period, an arbitrary constant fraction of technological-knowledge stock is lost. By connecting the aggregate resource constraint with...
Provided by University of Porto
-
White Papers
Interaction And Negotiation Process In Business Service Relationships: Illustrative Cases
August 28, 2010, 12:00am PDT
This paper analyses business service relationships from the purchaser's point of view. The paper establishes a bridge between the type of business service and purchasing relationship or...
Provided by University of Porto
-
White Papers
Managing Interdependencies In Supplier Portfolios
June 30, 2009, 12:00am PDT
Building and managing a supplier base has been referred in the literature as a key issue of supplier management. Since the seminal work of Kraljic in 1983, scholars have proposed a number of...
Provided by University of Porto
-
White Papers
Innovation, Collective Action And Network Positioning: A Case From The Automotive Industry
July 1, 2009, 12:00am PDT
Cooperation in industrial networks is a key issue within the conceptual framework developed by the IMP Group. Despite the existence of some studies, little attention has been paid to collective...
Provided by University of Porto
-
Whitepapers
An Efficient Scheduling Mechanism for Simulating Concurrent Events in Wireless Communications Based on an Improved Priority Queue (PQ) TDM Layered Multi-Threading Approach
March 1, 2008, 12:00am PST
The physical activities of a real wireless network are represented by events which are the main components of a Discrete Event Simulation (DES) system and are produced by its event generator...
Provided by University of Porto
-
Whitepapers
Improved Integral Channel Allocation Algorithms in Cellular Communication Systems Enabling Multimedia QoS Services
October 1, 2008, 12:00am PDT
While bandwidth management in cellular communication systems has been thoroughly examined for voice channel admission by developing several DCA (Dynamic Channel Assignment) strategies, there are a...
Provided by University of Porto
-
Whitepapers
On a New Generation of Event Scheduling Algorithms and Evaluation Techniques for Efficient Simulation Modelling of Large Scale Cellular Networks Bandwidth Management Based on Multitasking Theory
October 1, 2008, 12:00am PDT
There are many research efforts for improving bandwidth management in wireless communication systems based mainly on DCA (Dynamic Channel Allocation) schemes designed and evaluated through various...
Provided by University of Porto
-
Whitepapers
Efficient Time Synchronized One-Time Password Scheme to Provide Secure Wake-Up Authentication on Wireless Sensor Networks
January 1, 2013, 12:00am PST
In this paper, the authors propose time synchronized one-time-password scheme to provide secure wake up authentication. The main constraint of Wireless Sensor Networks is their limited power...
Provided by University of Porto
-
Whitepapers
On the Efficient Implementation of a High Performance Multi-Agent Simulation System for Modeling Cellular Communications Involving a Novel Event Scheduling Algorithm
August 31, 2011, 12:00am PDT
Simulation models are used in the design, development and evaluation of wireless communication systems. While basic network entities as Base Stations and users are always taken into account in...
Provided by University of Porto
-
White Papers
Reliability and Availability Evaluation of Wireless Sensor Networks for Industrial Applications
January 12, 2012, 12:00am PST
Wireless Sensor Networks (WSN) currently represent the best candidate to be adopted as the communication solution for the last mile connection in process control and monitoring applications in...
Provided by University of Porto
-
White Papers
Real-Time Communication in IEEE 802.11 Wireless Mesh Networks: A Prospective Study
January 30, 2011, 12:00am PST
The purpose of this paper is to present an on-going prospective study about IEEE 802.11 Wireless Mesh Networks (WMNs), focusing on available techniques to support real-time communication. This...
Provided by University of Porto
-
White Papers
Trade-Off Between Cost and Goodput in Wireless
March 13, 2012, 12:00am PDT
The authors study the cost of improving the good-put, or the useful data rate, to user in a wireless network. They measure the cost in terms of number of base stations, which is highly correlated...
Provided by University of Porto
-
White Papers
On the Implementation of the Probabilistic Logic Programming Language ProbLog
June 23, 2010, 12:00am PDT
The past few years have seen a surge of interest in the field of probabilistic logic learning and statistical relational learning. In this endeavor, many probabilistic logics have been developed....
Provided by University of Porto
-
Whitepapers
On the Efficient Implementation of a High Performance Multi-Agent Simulation System for Modeling Cellular Communications Involving a Novel Event Scheduling Algorithm
August 31, 2011, 12:00am PDT
Simulation models are used in the design, development and evaluation of wireless communication systems. While basic network entities as Base Stations and users are always taken into account in...
Provided by University of Porto
-
Whitepapers
Efficient Time Synchronized One-Time Password Scheme to Provide Secure Wake-Up Authentication on Wireless Sensor Networks
January 1, 2013, 12:00am PST
In this paper, the authors propose time synchronized one-time-password scheme to provide secure wake up authentication. The main constraint of Wireless Sensor Networks is their limited power...
Provided by University of Porto
-
Whitepapers
On a New Generation of Event Scheduling Algorithms and Evaluation Techniques for Efficient Simulation Modelling of Large Scale Cellular Networks Bandwidth Management Based on Multitasking Theory
October 1, 2008, 12:00am PDT
There are many research efforts for improving bandwidth management in wireless communication systems based mainly on DCA (Dynamic Channel Allocation) schemes designed and evaluated through various...
Provided by University of Porto
-
Whitepapers
Improved Integral Channel Allocation Algorithms in Cellular Communication Systems Enabling Multimedia QoS Services
October 1, 2008, 12:00am PDT
While bandwidth management in cellular communication systems has been thoroughly examined for voice channel admission by developing several DCA (Dynamic Channel Assignment) strategies, there are a...
Provided by University of Porto
-
Whitepapers
An Efficient Scheduling Mechanism for Simulating Concurrent Events in Wireless Communications Based on an Improved Priority Queue (PQ) TDM Layered Multi-Threading Approach
March 1, 2008, 12:00am PST
The physical activities of a real wireless network are represented by events which are the main components of a Discrete Event Simulation (DES) system and are produced by its event generator...
Provided by University of Porto
-
White Papers
On the Implementation of the Probabilistic Logic Programming Language ProbLog
June 23, 2010, 12:00am PDT
The past few years have seen a surge of interest in the field of probabilistic logic learning and statistical relational learning. In this endeavor, many probabilistic logics have been developed....
Provided by University of Porto
-
White Papers
Trade-Off Between Cost and Goodput in Wireless
March 13, 2012, 12:00am PDT
The authors study the cost of improving the good-put, or the useful data rate, to user in a wireless network. They measure the cost in terms of number of base stations, which is highly correlated...
Provided by University of Porto
-
White Papers
Real-Time Communication in IEEE 802.11 Wireless Mesh Networks: A Prospective Study
January 30, 2011, 12:00am PST
The purpose of this paper is to present an on-going prospective study about IEEE 802.11 Wireless Mesh Networks (WMNs), focusing on available techniques to support real-time communication. This...
Provided by University of Porto
-
White Papers
Reliability and Availability Evaluation of Wireless Sensor Networks for Industrial Applications
January 12, 2012, 12:00am PST
Wireless Sensor Networks (WSN) currently represent the best candidate to be adopted as the communication solution for the last mile connection in process control and monitoring applications in...
Provided by University of Porto
-
White Papers
Innovation, Collective Action And Network Positioning: A Case From The Automotive Industry
July 1, 2009, 12:00am PDT
Cooperation in industrial networks is a key issue within the conceptual framework developed by the IMP Group. Despite the existence of some studies, little attention has been paid to collective...
Provided by University of Porto
-
White Papers
Managing Interdependencies In Supplier Portfolios
June 30, 2009, 12:00am PDT
Building and managing a supplier base has been referred in the literature as a key issue of supplier management. Since the seminal work of Kraljic in 1983, scholars have proposed a number of...
Provided by University of Porto
-
White Papers
Interaction And Negotiation Process In Business Service Relationships: Illustrative Cases
August 28, 2010, 12:00am PDT
This paper analyses business service relationships from the purchaser's point of view. The paper establishes a bridge between the type of business service and purchasing relationship or...
Provided by University of Porto
-
White Papers
Technological-Knowledge Dynamics In Lab-Equipment Models Of Quality Ladders
July 1, 2008, 12:00am PDT
The Perpetual Inventory Model (PIM) assumes that, in each period, an arbitrary constant fraction of technological-knowledge stock is lost. By connecting the aggregate resource constraint with...
Provided by University of Porto
-
White Papers
Re-Evaluating The Impact Of Natural Resources On Economic Growth
June 1, 2008, 12:00am PDT
In this paper the authors re-evaluate the impact of natural resources on economic growth. The reassessment is based on a growth model where, using panel-data analysis, natural-resource variables...
Provided by University of Porto
-
White Papers
Open Standards and Open Source: Enabling Interoperability
January 1, 2011, 12:00am PST
Interoperability is a major requirement for industries and governments in a society that increasingly moves towards global collaboration and integration. Open standards built on the principles of...
Provided by University of Porto
-
White Papers
An Implementation of IP Over UMTS With QoS
January 1, 2010, 12:00am PST
The IST ARROWS (Advanced Radio Resource Management for Wireless Services) project aims at providing Radio Resource Management (RRM) and Quality of Service (QoS) management solutions for the...
Provided by University of Porto
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