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Budapest, Hungary

Farkas Z.,MTA SZTAKI
Journal of Grid Computing | Year: 2011

We can distinguish two different Grid concepts: desktop and service Grids. Both Grid concepts have their advantages and disadvantages, however these are different. For example desktop Grids are a cost-effective platform, but sometimes unreliable. On the other hand service Grids are highly reliable, but need remarkable funding. The aim of Grid interoperability is to combine the advantages of the different Grid concepts, so the integrated infrastructure offers the best of both concepts. Within the paper we define the Grid interoperability problem, and approximate to the generic architecture through a formal model. We prove formally that the resulting architecture solves the Grid interoperability problem, and is generic enough to interconnect different Grid infrastructures with minor work. We also show in the paper that the formal concept can be applied for creating a gLite to BOINC bridge, and the performance of the core bridge implementation is satisfactory. © 2011 Springer Science+Business Media B.V. Source


Paniti I.,MTA SZTAKI
Proceedings for the Joint Conference of ISR 2014 - 45th International Symposium on Robotics and Robotik 2014 - 8th German Conference on Robotics, ISR/ROBOTIK 2014 | Year: 2014

This paper describes a new solution of an incremental, single-robot based sheet forming process with tool path calculation and thickness measurement approaches, for the production of sheet metal and thermoplastic components for prototypes and small series. As an alternative to conventional stamping and deep drawing processes which are based on big and costly dies and presses, the shaping system is based on robotized Incremental Sheet Forming (ISF), a new, clean and affordable process. © VDE VERLAG GMBH Berlin Offenbach. Source


Artusi A.,Cyprus Institute CaSToRC | Banterle F.,CNR Institute of Information Science and Technologies Alessandro Faedo | Chetverikov D.,MTA SZTAKI
Computer Graphics Forum | Year: 2011

The separation of reflection components is an important issue in computer graphics, computer vision and image processing. It provides useful information for the applications that need consistent object surface appearance, such as stereo reconstruction, visual recognition, tracking, objects re-illumination and dichromatic editing. In this paper we will present a brief survey of recent advances in separation of reflection components, also known as specularity (highlights) removal. Several techniques that try to tackle the problem from different points of view have been proposed so far. In this survey, we will overview these methods and we will present a critical analysis of their benefits and drawbacks. © 2011 The Authors. Source


Farkas Z.,MTA SZTAKI | Kacsuk P.,MTA SZTAKI
Future Generation Computer Systems | Year: 2011

P-GRADE portal is an open-source multi-grid portal that supports creation, execution and management of traditional and parameter study workflows on gLite and GT-2 infrastructures. However, some user communities need support for other grid types, like desktop grids or the Amazon EC2 cloud, as well. In this paper we will present the internal architecture of P-GRADE Portal as well as the implementation details of grid support methods. This paper intends to give support for those communities who would like to further develop the portal or create a similar one for other workflow systems. © 2010 Elsevier B.V. All rights reserved. Source


Kertesz A.,MTA SZTAKI | Kecskemeti G.,MTA SZTAKI | Brandic I.,Vienna University of Technology
Future Generation Computer Systems | Year: 2014

Cloud computing is a newly emerged computing infrastructure that builds on the latest achievements of diverse research areas, such as Grid computing, Service-oriented computing, business process management and virtualization. An important characteristic of Cloud-based services is the provision of non-functional guarantees in the form of Service Level Agreements (SLAs), such as guarantees on execution time or price. However, due to system malfunctions, changing workload conditions, hard- and software failures, established SLAs can be violated. In order to avoid costly SLA violations, flexible and adaptive SLA attainment strategies are needed. In this paper we present a self-manageable architecture for SLA-based service virtualization that provides a way to ease interoperable service executions in a diverse, heterogeneous, distributed and virtualized world of services. We demonstrate in this paper that the combination of negotiation, brokering and deployment using SLA-aware extensions and autonomic computing principles are required for achieving reliable and efficient service operation in distributed environments. © 2012 Elsevier B.V. All rights reserved. Source

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