AGH University of Science and Technology

Displaying 1-21 of 21 results

  • White Papers // Jan 2013

    Cost Minimization for Computational Applications on Hybrid Cloud Infrastructures

    The authors address the problem of task planning on multiple clouds formulated as a Mixed Integer Non-Linear Programming problem (MINLP). Its specification with AMPL modeling language allows them to apply solvers such as Bonmin and Cbc. Their model assumes multiple heterogeneous compute and storage cloud providers, such as Amazon, Rackspace,...

    Provided By AGH University of Science and Technology

  • White Papers // Nov 2012

    Personal Identification Based on Cognitive Analysis of Selected Medical Visualization

    In this paper, the authors proposed a new algorithm of personal identification based on selected non-standard visual patterns in the form of biomedical visualization. The proposed solutions will be illustrated on the example of using intelligent information systems applied for extraction and unique personal feature vector, which next will be...

    Provided By AGH University of Science and Technology

  • White Papers // Oct 2012

    Strategic Information Splitting Using Biometric Patterns

    In this paper, the authors proposed a new algorithm for secure strategic information sharing using biometric information. In classic cryptographic threshold schemes used for secret splitting and sharing there aren't any connection between generated shares and particular participants of threshold protocol. In fact sometimes it may be useful to generate...

    Provided By AGH University of Science and Technology

  • White Papers // Jul 2012

    Overview of BPMN Model Equivalences. Towards Normalization of BPMN Diagrams

    In various application domains, there is a desire to standardize modeling techniques. Business Process Model and Notation (BPMN) is currently the most widespread language used for modeling Business Processes (BP). Although there are some guidelines how to use this notation, the issue of modeling technique is not standardized. The same...

    Provided By AGH University of Science and Technology

  • White Papers // Jul 2012

    Cost- and Deadline-Constrained Provisioning for Scientific Workflow Ensembles in IaaS Clouds

    Large-scale applications expressed as scientific workflows are often grouped into ensembles of inter-related workflows. In this paper, the authors address a new and important problem concerning the efficient management of such ensembles under budget and deadline constraints on Infrastructure-as-a-Service (IaaS) clouds. They discuss, develop, and assess algorithms based on static...

    Provided By AGH University of Science and Technology

  • White Papers // May 2012

    Will P2P Users Cooperate With ISPs? a Word-of-Mouth Communication Approach

    Researchers who address the problem of application-level traffic optimization often consider only the simplest comparison scenario: the case before the option to cooperate and optimize the service is enabled, and the case in which all clients try to optimize the traffic. In this paper, the situations that a user may...

    Provided By AGH University of Science and Technology

  • White Papers // May 2012

    Providing Throughput and Fairness Guarantees in Virtualized WLANs Through Control Theory

    With the increasing demand for mobile Internet access, WLAN virtualization is becoming a promising solution for sharing wireless infrastructure among multiple service providers. Unfortunately, few mechanisms have been devised to tackle this problem and the existing approaches fail in optimizing the limited bandwidth and providing virtual networks with fairness guarantees....

    Provided By AGH University of Science and Technology

  • White Papers // Sep 2011

    Toward Governance of Cross-Cloud Application Deployment

    In this paper, the authors introduce the main ideas around the governance of cross-Cloud application deployment and their related concepts. It is argued that, due to the increasing complexity and nature of the Cloud market, an intermediary specialized in brokering the deployment of different components of a same application onto...

    Provided By AGH University of Science and Technology

  • White Papers // Aug 2011

    Proposal of a Hierarchical Approach to Formal Verification of BPMN Models Using Alvis and XTT2 Methods

    BPMN is a visual notation for modeling business processes. Although there are many tools supporting it, they rarely provide formal verification of models. The authors propose a new approach to formal verification of BPMN models using the Alvis modeling language and the XTT2 knowledge representation. The structure of the BPMN...

    Provided By AGH University of Science and Technology

  • White Papers // Jan 2011

    Modeling and Analysis of Business Processes with Business Rules

    Visual business process representation languages such as BPMN are a useful tool for specification of business processes. However, practical verification and execution of Business Process Models is a challenging task. One solution to this problem is integration of business processes with business rules, which provides a flexible runtime environment. This...

    Provided By AGH University of Science and Technology

  • White Papers // Nov 2010

    Virtualization of Grid Networking Resources for Computation Mobility Support

    The paper analyses Grid networking resource virtualization technologies and requirements in the context of computational mobility. The mechanisms of network virtualization supported by Xen and xVM/Crossbow are presented and compared. A network virtualization model, consisting of three layers, is presented. Changes in virtual network infrastructures resulting from VM or zone...

    Provided By AGH University of Science and Technology

  • White Papers // Nov 2010

    Are Carrier Transport Effects Important for Chirp Modeling of Quantum-Well Lasers?

    The Quantum-, or Multi-Quantum-Well (QW, or MQW) structure introduced to the semiconductor laser design implies some new phenomena in the device operation, when compared with the bulk laser design. Among them the transport of injected carriers across the Separate-Confinement Heterostructure (SCH) and capturing them into the QW regions introduce some...

    Provided By AGH University of Science and Technology

  • White Papers // Nov 2010

    Precise Measurements of Highly Attenuated Optical Eye Diagrams

    Analysis of the eye diagram (called also the eye pattern) is a simple but powerful method of digital transmission channel diagnostics. The eye diagram arises from overlapping many different data patterns time-shifted by an integer number of unit intervals (i.e. serial clock cycles). Degradation of the digital signal, caused by...

    Provided By AGH University of Science and Technology

  • White Papers // Nov 2010

    Bit Error Rate Tester for 10 Gb/s Fibre Optic Link

    The bit error rate tester suitable for operation in 10 Gb/s fibre optic links is described in the paper. The BER tester was built from commercially available components. Generation and reception of 10 Gb/s data stream is performed with help of high-speed serialiser and deserialiser by Maxim. The main functions...

    Provided By AGH University of Science and Technology

  • White Papers // Jun 2010

    Usage of Business Rules in Supply Chain Management

    If enterprise wants to effectively respond to changes in supply chain it needs IT support on operational level. The growth of efficiency in supply chain management depends on the level of IT support in enterprise and its flexibility to adapt to changes. Business rules management systems enable dynamic adjustment to...

    Provided By AGH University of Science and Technology

  • White Papers // Apr 2010

    ESB - Modern SOA Infrastructure

    The traditional Enterprise Service Bus (ESB) supports Service Oriented Architecture (SOA) providing faster and cheaper integration of existing IT systems. ESB technology has been arisen from such principles like Enterprise Application Integration (EAI), but it is still not sufficient to satisfy SOA requirements with respect to governance. Vendors of ESB...

    Provided By AGH University of Science and Technology

  • White Papers // Oct 2009

    Business Rules Design Method for Business Process Management

    The goal of any business process management solution is to build a better business. Process design and automation technologies are being increasingly used to improve quality and efficiency of business processes, and - in consequence - to deliver services rapidly and reliably. The paper deals with the problem of designing...

    Provided By AGH University of Science and Technology

  • White Papers // Oct 2009

    Multicast Mobility in Heterogeneous Technologies: Experimental Validation

    The convergence of services and technologies has been driven by service and network providers with the aim to develop a unified infrastructure. From the services side, the authors have multimedia through unicast, multicast and broadcast services. From the technologies side, they have wired and wireless technologies, including unidirectional technologies such...

    Provided By AGH University of Science and Technology

  • White Papers // Oct 2009

    Coded OFDM vs. Wavelet-OFDM and Circular Wavelet-OFDM for Power Line Communications

    The paper presents results from simulations of three uncoded and coded multicarrier systems: OFDM, Wavelet-OFDM and Circular Wavelet-OFDM working in the in-door Power Line Communications (PLC). Circular Wavelet-OFDM is a multicarrier scheme, in which frames are additionally processed in a circular fashion and the equalization is realized very simple thanks...

    Provided By AGH University of Science and Technology

  • White Papers // Sep 2009

    A Multi-Layer Recovery Strategy in FAN Over WDM Architectures

    Network operators are migrating towards IP over WDM architectures. In such multi-layer networks, it is necessary to efficiently use the resources available from both layers in order to provide coordinated recovery strategies. Thanks to the development of the control plane (GMPLS and ASON), it is feasible to set up and...

    Provided By AGH University of Science and Technology

  • White Papers // Jan 2009

    Cheating on the CW and RTS/CTS Mechanisms in Single-Hop IEEE 802.11e Networks

    This paper presents a work in progress which deals with the problem of node misbehaviour in ad-hoc networks. A realistic approach is used to determine the impact of contention window manipulation and RTS/CTS cheating. It is explained why IEEE 802.11e ad-hoc networks are more prone to misbehaviour. The paper presents...

    Provided By AGH University of Science and Technology

  • White Papers // Nov 2010

    Virtualization of Grid Networking Resources for Computation Mobility Support

    The paper analyses Grid networking resource virtualization technologies and requirements in the context of computational mobility. The mechanisms of network virtualization supported by Xen and xVM/Crossbow are presented and compared. A network virtualization model, consisting of three layers, is presented. Changes in virtual network infrastructures resulting from VM or zone...

    Provided By AGH University of Science and Technology

  • White Papers // Jan 2009

    Cheating on the CW and RTS/CTS Mechanisms in Single-Hop IEEE 802.11e Networks

    This paper presents a work in progress which deals with the problem of node misbehaviour in ad-hoc networks. A realistic approach is used to determine the impact of contention window manipulation and RTS/CTS cheating. It is explained why IEEE 802.11e ad-hoc networks are more prone to misbehaviour. The paper presents...

    Provided By AGH University of Science and Technology

  • White Papers // Oct 2009

    Coded OFDM vs. Wavelet-OFDM and Circular Wavelet-OFDM for Power Line Communications

    The paper presents results from simulations of three uncoded and coded multicarrier systems: OFDM, Wavelet-OFDM and Circular Wavelet-OFDM working in the in-door Power Line Communications (PLC). Circular Wavelet-OFDM is a multicarrier scheme, in which frames are additionally processed in a circular fashion and the equalization is realized very simple thanks...

    Provided By AGH University of Science and Technology

  • White Papers // May 2012

    Will P2P Users Cooperate With ISPs? a Word-of-Mouth Communication Approach

    Researchers who address the problem of application-level traffic optimization often consider only the simplest comparison scenario: the case before the option to cooperate and optimize the service is enabled, and the case in which all clients try to optimize the traffic. In this paper, the situations that a user may...

    Provided By AGH University of Science and Technology

  • White Papers // Sep 2011

    Toward Governance of Cross-Cloud Application Deployment

    In this paper, the authors introduce the main ideas around the governance of cross-Cloud application deployment and their related concepts. It is argued that, due to the increasing complexity and nature of the Cloud market, an intermediary specialized in brokering the deployment of different components of a same application onto...

    Provided By AGH University of Science and Technology

  • White Papers // Sep 2009

    A Multi-Layer Recovery Strategy in FAN Over WDM Architectures

    Network operators are migrating towards IP over WDM architectures. In such multi-layer networks, it is necessary to efficiently use the resources available from both layers in order to provide coordinated recovery strategies. Thanks to the development of the control plane (GMPLS and ASON), it is feasible to set up and...

    Provided By AGH University of Science and Technology

  • White Papers // Nov 2010

    Are Carrier Transport Effects Important for Chirp Modeling of Quantum-Well Lasers?

    The Quantum-, or Multi-Quantum-Well (QW, or MQW) structure introduced to the semiconductor laser design implies some new phenomena in the device operation, when compared with the bulk laser design. Among them the transport of injected carriers across the Separate-Confinement Heterostructure (SCH) and capturing them into the QW regions introduce some...

    Provided By AGH University of Science and Technology

  • White Papers // Nov 2010

    Precise Measurements of Highly Attenuated Optical Eye Diagrams

    Analysis of the eye diagram (called also the eye pattern) is a simple but powerful method of digital transmission channel diagnostics. The eye diagram arises from overlapping many different data patterns time-shifted by an integer number of unit intervals (i.e. serial clock cycles). Degradation of the digital signal, caused by...

    Provided By AGH University of Science and Technology

  • White Papers // Nov 2010

    Bit Error Rate Tester for 10 Gb/s Fibre Optic Link

    The bit error rate tester suitable for operation in 10 Gb/s fibre optic links is described in the paper. The BER tester was built from commercially available components. Generation and reception of 10 Gb/s data stream is performed with help of high-speed serialiser and deserialiser by Maxim. The main functions...

    Provided By AGH University of Science and Technology

  • White Papers // Oct 2012

    Strategic Information Splitting Using Biometric Patterns

    In this paper, the authors proposed a new algorithm for secure strategic information sharing using biometric information. In classic cryptographic threshold schemes used for secret splitting and sharing there aren't any connection between generated shares and particular participants of threshold protocol. In fact sometimes it may be useful to generate...

    Provided By AGH University of Science and Technology

  • White Papers // Nov 2012

    Personal Identification Based on Cognitive Analysis of Selected Medical Visualization

    In this paper, the authors proposed a new algorithm of personal identification based on selected non-standard visual patterns in the form of biomedical visualization. The proposed solutions will be illustrated on the example of using intelligent information systems applied for extraction and unique personal feature vector, which next will be...

    Provided By AGH University of Science and Technology

  • White Papers // Oct 2009

    Multicast Mobility in Heterogeneous Technologies: Experimental Validation

    The convergence of services and technologies has been driven by service and network providers with the aim to develop a unified infrastructure. From the services side, the authors have multimedia through unicast, multicast and broadcast services. From the technologies side, they have wired and wireless technologies, including unidirectional technologies such...

    Provided By AGH University of Science and Technology

  • White Papers // Jan 2013

    Cost Minimization for Computational Applications on Hybrid Cloud Infrastructures

    The authors address the problem of task planning on multiple clouds formulated as a Mixed Integer Non-Linear Programming problem (MINLP). Its specification with AMPL modeling language allows them to apply solvers such as Bonmin and Cbc. Their model assumes multiple heterogeneous compute and storage cloud providers, such as Amazon, Rackspace,...

    Provided By AGH University of Science and Technology

  • White Papers // May 2012

    Providing Throughput and Fairness Guarantees in Virtualized WLANs Through Control Theory

    With the increasing demand for mobile Internet access, WLAN virtualization is becoming a promising solution for sharing wireless infrastructure among multiple service providers. Unfortunately, few mechanisms have been devised to tackle this problem and the existing approaches fail in optimizing the limited bandwidth and providing virtual networks with fairness guarantees....

    Provided By AGH University of Science and Technology

  • White Papers // Jun 2010

    Usage of Business Rules in Supply Chain Management

    If enterprise wants to effectively respond to changes in supply chain it needs IT support on operational level. The growth of efficiency in supply chain management depends on the level of IT support in enterprise and its flexibility to adapt to changes. Business rules management systems enable dynamic adjustment to...

    Provided By AGH University of Science and Technology

  • White Papers // Jan 2011

    Modeling and Analysis of Business Processes with Business Rules

    Visual business process representation languages such as BPMN are a useful tool for specification of business processes. However, practical verification and execution of Business Process Models is a challenging task. One solution to this problem is integration of business processes with business rules, which provides a flexible runtime environment. This...

    Provided By AGH University of Science and Technology

  • White Papers // Apr 2010

    ESB - Modern SOA Infrastructure

    The traditional Enterprise Service Bus (ESB) supports Service Oriented Architecture (SOA) providing faster and cheaper integration of existing IT systems. ESB technology has been arisen from such principles like Enterprise Application Integration (EAI), but it is still not sufficient to satisfy SOA requirements with respect to governance. Vendors of ESB...

    Provided By AGH University of Science and Technology

  • White Papers // Aug 2011

    Proposal of a Hierarchical Approach to Formal Verification of BPMN Models Using Alvis and XTT2 Methods

    BPMN is a visual notation for modeling business processes. Although there are many tools supporting it, they rarely provide formal verification of models. The authors propose a new approach to formal verification of BPMN models using the Alvis modeling language and the XTT2 knowledge representation. The structure of the BPMN...

    Provided By AGH University of Science and Technology

  • White Papers // Oct 2009

    Business Rules Design Method for Business Process Management

    The goal of any business process management solution is to build a better business. Process design and automation technologies are being increasingly used to improve quality and efficiency of business processes, and - in consequence - to deliver services rapidly and reliably. The paper deals with the problem of designing...

    Provided By AGH University of Science and Technology

  • White Papers // Jul 2012

    Overview of BPMN Model Equivalences. Towards Normalization of BPMN Diagrams

    In various application domains, there is a desire to standardize modeling techniques. Business Process Model and Notation (BPMN) is currently the most widespread language used for modeling Business Processes (BP). Although there are some guidelines how to use this notation, the issue of modeling technique is not standardized. The same...

    Provided By AGH University of Science and Technology

  • White Papers // Jul 2012

    Cost- and Deadline-Constrained Provisioning for Scientific Workflow Ensembles in IaaS Clouds

    Large-scale applications expressed as scientific workflows are often grouped into ensembles of inter-related workflows. In this paper, the authors address a new and important problem concerning the efficient management of such ensembles under budget and deadline constraints on Infrastructure-as-a-Service (IaaS) clouds. They discuss, develop, and assess algorithms based on static...

    Provided By AGH University of Science and Technology