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National Technical University of Athens
(35 results)-
White Papers
Visualizing Multidimensional Data Through Granularity-Dependent Spatialization
October 15, 2009, 12:00am PDT
Spatialization is a special kind of visualization that projects multidimensional data into low-dimensional representational spaces by making use of spatial metaphors. Spatialization methods face a...
Provided by National Technical University of Athens
-
White Papers
An Expert Systems Methodology For Equity Selection Using Financial Analysis
August 19, 2008, 12:00am PDT
In this paper the authors' present expert systems methodology for supporting decisions that concern the selection of equities, on the basis of financial analysis. The proposed methodology is...
Provided by National Technical University of Athens
-
White Papers
An Integrated Mobile Mapping System for Data Acquisition and Automated Asset Extraction
November 7, 2007, 12:00am PST
In recent years, public and private organizations worldwide are facing a continuously increasing demand to build and maintain the asset inventory of their infrastructure network. This is due to...
Provided by National Technical University of Athens
-
White Papers
Redesigning the Open Mobile Alliance License Choice Algorithm
February 8, 2011, 12:00am PST
Open Mobile Alliance (OMA) is an organization that is responsible for the creation of standards (among others) for the Mobile DRM systems and consists of some of most major mobile phone...
Provided by National Technical University of Athens
-
White Papers
A Model Predictive Control and Time Series Forecasting Framework for Supply Chain Management
June 9, 2009, 12:00am PDT
Model Predictive Control has been previously applied to supply chain problems with promising results; however hitherto proposed systems possessed no information on future demand. A forecasting...
Provided by National Technical University of Athens
-
White Papers
Custom Microcoded Dynamic Memory Management for Distributed On-Chip Memory Organizations
February 24, 2011, 12:00am PST
Multi-Processor System-on-Chip (MPSoCs) have attracted significant attention since they are recognized as a scalable paradigm to interconnect and organize a high number of cores. Current...
Provided by National Technical University of Athens
-
White Papers
A Framework for Preserving User Privacy and Ensuring QoS in Location Based Services Using Non-Irreversible Algorithm
April 1, 2009, 12:00am PDT
In this paper, the authors address the issue of preserving user privacy in location based services provisioning. This issue includes two controversial requirements, namely the protection of user's...
Provided by National Technical University of Athens
-
White Papers
Performance Evaluation of an Enhanced Uplink 3.5G System for Mobile Healthcare Applications
December 31, 2008, 12:00am PST
The present paper studies the prospective and the performance of a forthcoming high-speed third generation (3.5G) networking technology, called enhanced uplink, for delivering mobile health...
Provided by National Technical University of Athens
-
White Papers
Translation of Application-Level Terms to Resource-Level Attributes Across the Cloud Stack Layers
April 29, 2011, 12:00am PDT
The emergence of new environments such as Cloud computing highlighted new challenges in traditional fields like performance estimation. Most of the current cloud environments follow the Software,...
Provided by National Technical University of Athens
-
White Papers
Multi-Satellite MIMO Communications at Ku-Band and Above: Investigations on Spatial Multiplexing for Capacity Improvement and Selection Diversity for Interference Mitigation
May 13, 2007, 12:00am PDT
This paper investigates the applicability of Multiple-Input Multiple-Output (MIMO) technology to satellite communications at the Ku-band and above. After introducing the possible diversity sources...
Provided by National Technical University of Athens
-
White Papers
Clustering XML Documents by Structure
January 1, 2012, 12:00am PST
This paper explores the application of clustering methods for grouping structurally similar XML documents. Modeling the XML documents as rooted ordered labeled trees, they apply clustering...
Provided by National Technical University of Athens
-
White Papers
Data Fusion Algorithms for Network Anomaly Detection: Classification and Evaluation
January 18, 2008, 12:00am PST
In this paper, the problem of discovering anomalies in a large-scale network based on the data fusion of heterogeneous monitors is considered. The authors present a classification of anomaly...
Provided by National Technical University of Athens
-
White Papers
Ontology-Driven Conceptual Design of ETL Processes Using Graph Transformations
November 29, 2009, 12:00am PST
One of the main tasks during the early steps of a data warehouse project is the identification of the appropriate transformations and the specification of inter-schema mappings from the source to...
Provided by National Technical University of Athens
-
White Papers
Policy-Regulated Management of ETL Evolution
November 29, 2009, 12:00am PST
In this paper, the authors discuss the problem of performing impact prediction for changes that occur in the schema/structure of the data warehouse sources. They abstract Extract-Transform-Load...
Provided by National Technical University of Athens
-
White Papers
Rule-Based Management of Schema Changes at ETL Sources
October 14, 2009, 12:00am PDT
In this paper, the authors visit the problem of the management of inconsistencies emerging on ETL processes as results of evolution operations occurring at their sources. They abstract...
Provided by National Technical University of Athens
-
White Papers
Evaluating Reachability Queries Over Path Collections
April 13, 2009, 12:00am PDT
Several applications in areas such as biochemistry, GIS, involve storing and querying large volumes of sequential data stored as path collections. There is a number of interesting queries that can...
Provided by National Technical University of Athens
-
White Papers
Topologically Sorted Skylines for Partially Ordered Domains
November 20, 2008, 12:00am PST
The vast majority of work on skyline queries considers totally ordered domains, whereas in many applications some attributes are partially ordered, as for instance, domains of set values,...
Provided by National Technical University of Athens
-
White Papers
Efficient Semantic Web Service Discovery in Centralized and P2P Environments
July 22, 2008, 12:00am PDT
Efficient and scalable discovery mechanisms are critical for enabling service-oriented architectures on the Semantic Web. The majority of currently existing approaches focuses on centralized...
Provided by National Technical University of Athens
-
White Papers
Query Answering Over SROIQ Knowledge Bases With SPARQL
June 20, 2011, 12:00am PDT
W3C currently extends the SPARQL query language with so-called entailment regimes, which define how queries are evaluated using logical entailment relations. The authors describe a sound and...
Provided by National Technical University of Athens
-
White Papers
A Novel Methodology for Architecture-Level Exploration of 3D SoCs
May 8, 2011, 12:00am PDT
Three-Dimensional (3D) integration is an emerging technology that is expected to lead to tremendous benefits in terms of power, delay and silicon area. Moreover, 3D technology continues...
Provided by National Technical University of Athens
-
White Papers
A Software-Supported Methodology for Exploring Interconnection Architectures Targeting 3-D FPGAs
January 21, 2009, 12:00am PST
Interconnect structures significantly contribute to the delay, power consumption, and silicon area of modern reconfigurable architectures. The demand for higher clock frequencies and logic...
Provided by National Technical University of Athens
-
White Papers
System-Level Exploration of 3-D Interconnection Schemes
November 7, 2008, 12:00am PST
3-D chip stacking is the big next step in system integration. Even though the process technology is maturing, many issues related to system implementation are not fully understood yet....
Provided by National Technical University of Athens
-
White Papers
A Novel Methodology for Exploring Interconnection Architectures Targeting 3-D FPGAs
December 24, 2008, 12:00am PST
In current reconfigurable architectures the interconnection structures increasingly contribute more to the delay and power consumption. The demand for increased clock frequencies and logic density...
Provided by National Technical University of Athens
-
White Papers
Fault-Free: A Framework for Supporting Fault Tolerance in FPGAs
November 16, 2009, 12:00am PST
In this paper, the authors propose a novel methodology for supporting application mapping onto FPGAs with fault tolerance even if this feature is not supported by the target platform. For the...
Provided by National Technical University of Athens
-
White Papers
Towards Supporting Fault-Tolerance in FPGAs
April 28, 2010, 12:00am PDT
This paper proposes a novel methodology for improving reliability of FPGAs without requiring special purpose hardware. In contrast to related approaches that are applied uniformly over the target...
Provided by National Technical University of Athens
-
White Papers
A Framework for Enabling Fault Tolerance in Reconfigurable Architectures
December 19, 2009, 12:00am PST
Fault tolerance is a pre-request not only for safety critical systems, but almost for the majority of applications. However, the additional hardware elements impose performance degradation. In...
Provided by National Technical University of Athens
-
White Papers
Trading Fault-Masking With Performance Overhead for FPGAs
January 18, 2011, 12:00am PST
Reliability issues become an important design concern with technology scaling. This paper introduces a novel methodology for balancing the desired fault masking and the consequence delay and power...
Provided by National Technical University of Athens
-
White Papers
Thermal Optimization for Micro-Architectures Through Selective Block Replication
May 19, 2011, 12:00am PDT
Increased power densities result to higher on-chip temperatures, which in turn creates numerous problems tightly firmed to reliability issues. This problem is expected to become even more severe...
Provided by National Technical University of Athens
-
White Papers
Quick Hotspot: A Software Supported Methodology for Supporting Run-Time Thermal Analysis at MPSoC Designs
January 13, 2011, 12:00am PST
Detailed thermal analysis and exploration has recently received significant attention since it is straightforward-related to numerous reliability issues. Furthermore, thermal profiling is a...
Provided by National Technical University of Athens
-
White Papers
A Methodology and Tool Framework for Supporting Rapid Exploration of Memory Hierarchies in FPGAs
December 24, 2010, 12:00am PST
This paper introduces a novel methodology for enabling rapid exploration of memory hierarchies onto FPGA devices. The methodology is software supported by a new open-source tool framework, named...
Provided by National Technical University of Athens
-
White Papers
A Heterogeneous Multicore System on Chip With Run-Time Reconfigurable Virtual FPGA Architecture
December 19, 2010, 12:00am PST
System design, especially for low power embedded applications often profit from a heterogeneous target hardware platform. The application can be partitioned into modules with specific...
Provided by National Technical University of Athens
-
White Papers
A High-Level Mapping Algorithm Targeting 3D NoC Architectures With Multiple Vdd
April 28, 2010, 12:00am PDT
The communication problem in modern ICs becomes a challenge issue. This paper introduces a high-level mapping algorithm targeting to low-power 3D NoC devices. By appropriately assigning...
Provided by National Technical University of Athens
-
White Papers
Topology Exploration and Buffer Sizing for Three-Dimensional Networks-on-Chip
November 8, 2006, 12:00am PST
Future integrated systems will contain billion of transistors, composing tens to hundreds of IP cores. These IP cores, implementing emerging complex multimedia and network applications, should be...
Provided by National Technical University of Athens
-
White Papers
Dynamic Data Mediation in Enterprise Application Integration
July 9, 2008, 12:00am PDT
If one tries to increase the level of automation in Business-to-Business Enterprise Application Integration (EAI) scenarios, one confronts challenges related to the resolution of data and message...
Provided by National Technical University of Athens
-
White Papers
Gredia Middleware Architecture
November 26, 2007, 12:00am PST
This paper presents RDLS (Rich Data Location Services), a grid middleware for data management designed to meet the requirements posed by the GREDIA project. The main purpose of the described...
Provided by National Technical University of Athens
-
White Papers
Topology Exploration and Buffer Sizing for Three-Dimensional Networks-on-Chip
November 8, 2006, 12:00am PST
Future integrated systems will contain billion of transistors, composing tens to hundreds of IP cores. These IP cores, implementing emerging complex multimedia and network applications, should be...
Provided by National Technical University of Athens
-
White Papers
A High-Level Mapping Algorithm Targeting 3D NoC Architectures With Multiple Vdd
April 28, 2010, 12:00am PDT
The communication problem in modern ICs becomes a challenge issue. This paper introduces a high-level mapping algorithm targeting to low-power 3D NoC devices. By appropriately assigning...
Provided by National Technical University of Athens
-
White Papers
A Heterogeneous Multicore System on Chip With Run-Time Reconfigurable Virtual FPGA Architecture
December 19, 2010, 12:00am PST
System design, especially for low power embedded applications often profit from a heterogeneous target hardware platform. The application can be partitioned into modules with specific...
Provided by National Technical University of Athens
-
White Papers
A Methodology and Tool Framework for Supporting Rapid Exploration of Memory Hierarchies in FPGAs
December 24, 2010, 12:00am PST
This paper introduces a novel methodology for enabling rapid exploration of memory hierarchies onto FPGA devices. The methodology is software supported by a new open-source tool framework, named...
Provided by National Technical University of Athens
-
White Papers
Quick Hotspot: A Software Supported Methodology for Supporting Run-Time Thermal Analysis at MPSoC Designs
January 13, 2011, 12:00am PST
Detailed thermal analysis and exploration has recently received significant attention since it is straightforward-related to numerous reliability issues. Furthermore, thermal profiling is a...
Provided by National Technical University of Athens
-
White Papers
Thermal Optimization for Micro-Architectures Through Selective Block Replication
May 19, 2011, 12:00am PDT
Increased power densities result to higher on-chip temperatures, which in turn creates numerous problems tightly firmed to reliability issues. This problem is expected to become even more severe...
Provided by National Technical University of Athens
-
White Papers
Trading Fault-Masking With Performance Overhead for FPGAs
January 18, 2011, 12:00am PST
Reliability issues become an important design concern with technology scaling. This paper introduces a novel methodology for balancing the desired fault masking and the consequence delay and power...
Provided by National Technical University of Athens
-
White Papers
A Framework for Enabling Fault Tolerance in Reconfigurable Architectures
December 19, 2009, 12:00am PST
Fault tolerance is a pre-request not only for safety critical systems, but almost for the majority of applications. However, the additional hardware elements impose performance degradation. In...
Provided by National Technical University of Athens
-
White Papers
Towards Supporting Fault-Tolerance in FPGAs
April 28, 2010, 12:00am PDT
This paper proposes a novel methodology for improving reliability of FPGAs without requiring special purpose hardware. In contrast to related approaches that are applied uniformly over the target...
Provided by National Technical University of Athens
-
White Papers
Fault-Free: A Framework for Supporting Fault Tolerance in FPGAs
November 16, 2009, 12:00am PST
In this paper, the authors propose a novel methodology for supporting application mapping onto FPGAs with fault tolerance even if this feature is not supported by the target platform. For the...
Provided by National Technical University of Athens
-
White Papers
A Novel Methodology for Exploring Interconnection Architectures Targeting 3-D FPGAs
December 24, 2008, 12:00am PST
In current reconfigurable architectures the interconnection structures increasingly contribute more to the delay and power consumption. The demand for increased clock frequencies and logic density...
Provided by National Technical University of Athens
-
White Papers
System-Level Exploration of 3-D Interconnection Schemes
November 7, 2008, 12:00am PST
3-D chip stacking is the big next step in system integration. Even though the process technology is maturing, many issues related to system implementation are not fully understood yet....
Provided by National Technical University of Athens
-
White Papers
A Software-Supported Methodology for Exploring Interconnection Architectures Targeting 3-D FPGAs
January 21, 2009, 12:00am PST
Interconnect structures significantly contribute to the delay, power consumption, and silicon area of modern reconfigurable architectures. The demand for higher clock frequencies and logic...
Provided by National Technical University of Athens
-
White Papers
A Novel Methodology for Architecture-Level Exploration of 3D SoCs
May 8, 2011, 12:00am PDT
Three-Dimensional (3D) integration is an emerging technology that is expected to lead to tremendous benefits in terms of power, delay and silicon area. Moreover, 3D technology continues...
Provided by National Technical University of Athens
-
White Papers
Query Answering Over SROIQ Knowledge Bases With SPARQL
June 20, 2011, 12:00am PDT
W3C currently extends the SPARQL query language with so-called entailment regimes, which define how queries are evaluated using logical entailment relations. The authors describe a sound and...
Provided by National Technical University of Athens
-
White Papers
Efficient Semantic Web Service Discovery in Centralized and P2P Environments
July 22, 2008, 12:00am PDT
Efficient and scalable discovery mechanisms are critical for enabling service-oriented architectures on the Semantic Web. The majority of currently existing approaches focuses on centralized...
Provided by National Technical University of Athens
-
White Papers
Topologically Sorted Skylines for Partially Ordered Domains
November 20, 2008, 12:00am PST
The vast majority of work on skyline queries considers totally ordered domains, whereas in many applications some attributes are partially ordered, as for instance, domains of set values,...
Provided by National Technical University of Athens
-
White Papers
Evaluating Reachability Queries Over Path Collections
April 13, 2009, 12:00am PDT
Several applications in areas such as biochemistry, GIS, involve storing and querying large volumes of sequential data stored as path collections. There is a number of interesting queries that can...
Provided by National Technical University of Athens
-
White Papers
Rule-Based Management of Schema Changes at ETL Sources
October 14, 2009, 12:00am PDT
In this paper, the authors visit the problem of the management of inconsistencies emerging on ETL processes as results of evolution operations occurring at their sources. They abstract...
Provided by National Technical University of Athens
-
White Papers
Policy-Regulated Management of ETL Evolution
November 29, 2009, 12:00am PST
In this paper, the authors discuss the problem of performing impact prediction for changes that occur in the schema/structure of the data warehouse sources. They abstract Extract-Transform-Load...
Provided by National Technical University of Athens
-
White Papers
Ontology-Driven Conceptual Design of ETL Processes Using Graph Transformations
November 29, 2009, 12:00am PST
One of the main tasks during the early steps of a data warehouse project is the identification of the appropriate transformations and the specification of inter-schema mappings from the source to...
Provided by National Technical University of Athens
-
White Papers
Data Fusion Algorithms for Network Anomaly Detection: Classification and Evaluation
January 18, 2008, 12:00am PST
In this paper, the problem of discovering anomalies in a large-scale network based on the data fusion of heterogeneous monitors is considered. The authors present a classification of anomaly...
Provided by National Technical University of Athens
-
White Papers
Clustering XML Documents by Structure
January 1, 2012, 12:00am PST
This paper explores the application of clustering methods for grouping structurally similar XML documents. Modeling the XML documents as rooted ordered labeled trees, they apply clustering...
Provided by National Technical University of Athens
-
White Papers
Multi-Satellite MIMO Communications at Ku-Band and Above: Investigations on Spatial Multiplexing for Capacity Improvement and Selection Diversity for Interference Mitigation
May 13, 2007, 12:00am PDT
This paper investigates the applicability of Multiple-Input Multiple-Output (MIMO) technology to satellite communications at the Ku-band and above. After introducing the possible diversity sources...
Provided by National Technical University of Athens
-
White Papers
Translation of Application-Level Terms to Resource-Level Attributes Across the Cloud Stack Layers
April 29, 2011, 12:00am PDT
The emergence of new environments such as Cloud computing highlighted new challenges in traditional fields like performance estimation. Most of the current cloud environments follow the Software,...
Provided by National Technical University of Athens
-
White Papers
Performance Evaluation of an Enhanced Uplink 3.5G System for Mobile Healthcare Applications
December 31, 2008, 12:00am PST
The present paper studies the prospective and the performance of a forthcoming high-speed third generation (3.5G) networking technology, called enhanced uplink, for delivering mobile health...
Provided by National Technical University of Athens
-
White Papers
A Framework for Preserving User Privacy and Ensuring QoS in Location Based Services Using Non-Irreversible Algorithm
April 1, 2009, 12:00am PDT
In this paper, the authors address the issue of preserving user privacy in location based services provisioning. This issue includes two controversial requirements, namely the protection of user's...
Provided by National Technical University of Athens
-
White Papers
Custom Microcoded Dynamic Memory Management for Distributed On-Chip Memory Organizations
February 24, 2011, 12:00am PST
Multi-Processor System-on-Chip (MPSoCs) have attracted significant attention since they are recognized as a scalable paradigm to interconnect and organize a high number of cores. Current...
Provided by National Technical University of Athens
-
White Papers
A Model Predictive Control and Time Series Forecasting Framework for Supply Chain Management
June 9, 2009, 12:00am PDT
Model Predictive Control has been previously applied to supply chain problems with promising results; however hitherto proposed systems possessed no information on future demand. A forecasting...
Provided by National Technical University of Athens
-
White Papers
Redesigning the Open Mobile Alliance License Choice Algorithm
February 8, 2011, 12:00am PST
Open Mobile Alliance (OMA) is an organization that is responsible for the creation of standards (among others) for the Mobile DRM systems and consists of some of most major mobile phone...
Provided by National Technical University of Athens
-
White Papers
An Integrated Mobile Mapping System for Data Acquisition and Automated Asset Extraction
November 7, 2007, 12:00am PST
In recent years, public and private organizations worldwide are facing a continuously increasing demand to build and maintain the asset inventory of their infrastructure network. This is due to...
Provided by National Technical University of Athens
-
White Papers
An Expert Systems Methodology For Equity Selection Using Financial Analysis
August 19, 2008, 12:00am PDT
In this paper the authors' present expert systems methodology for supporting decisions that concern the selection of equities, on the basis of financial analysis. The proposed methodology is...
Provided by National Technical University of Athens
-
White Papers
Visualizing Multidimensional Data Through Granularity-Dependent Spatialization
October 15, 2009, 12:00am PDT
Spatialization is a special kind of visualization that projects multidimensional data into low-dimensional representational spaces by making use of spatial metaphors. Spatialization methods face a...
Provided by National Technical University of Athens
-
White Papers
Gredia Middleware Architecture
November 26, 2007, 12:00am PST
This paper presents RDLS (Rich Data Location Services), a grid middleware for data management designed to meet the requirements posed by the GREDIA project. The main purpose of the described...
Provided by National Technical University of Athens
-
White Papers
Dynamic Data Mediation in Enterprise Application Integration
July 9, 2008, 12:00am PDT
If one tries to increase the level of automation in Business-to-Business Enterprise Application Integration (EAI) scenarios, one confronts challenges related to the resolution of data and message...
Provided by National Technical University of Athens
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