Faculty of Natural Sciences

Abstract: The optimization of the irregular connection network of the multiprocessor systems with the distributed memory is the NP complete problem which is generally compute-intensive process. Graphics processing units provide a large computational power at a very low price allowing the fine-grained parallelism. This work investigates the use of the GPU in the parallelisation of the optimal irregular network configurations up to 128 processors.

This paper presents the solution of interpolating algorithm of snow cover computing
on different parallel computing architectures, eg cluster, graphics processing units (GPUs),
multi-core CPU Moreover, testing Algorithm was tested and deployed on grid technologies
connected toEGEE/Voce virtual organization utilizing high processing performance and
storage capacity. The comparison of performance of the computing is presented in the
article.

The OurGrid distributed environment is an open source grid middleware that
enables the creation of P2P computational grids to speed up the execution of bag-of-tasks
applications. Bag-of-tasks is an application model composed of several independent tasks
not communicating with each other during their execution, tolerating network delays and
faults. The paper shows that the main advantage to avoid bottlenecks is if the data gets
larger or computations become more complex and the conclusion is made based on the ...

In a short span of time, cloud computing has grown, particularly for commercial web
applications. But the cloud computing has the potential to become a greater instrument for
scientific computing as well. A pay-as-you-go model with minimal or no upfront costs creates
a flexible and cost-effective means to access compute resources. In this paper, we carry out
a study of the performance of the spatial data interpolation of depth of the snow cover on the
most widely used cloud infrastructure (Amazon Elastic Compute Cloud). The main ...

In this paper, we try to present the problems of the modern approach to treating various phobias. Virtual environments created by virtual reality (VR) tools can help to make the treatment of certain types of phobias more efficient. Attention to this form of phobia treatment with the help of VR is on the rise in the world, so we are also monitoring its development, as well. Our paper introduces the necessary hardware and software that has been piloted in our department, but also methods of creating virtual environments, models and application designed for medical therapies of patients. In ourworkwe have searched for and tested the following methods for creating virtual environments: A) modelling using computer graphics, B) modelling animation using animation programs, C) taking pictures of static objects and scenes, D) filming moving objects and scenes using classic video or special scanning techniques to create 360∘ panoramas or E) any combination of these methods.

Paleolimnological research in the territory of Slovakia has relatively short history with the beginning in the 1990s primarily as a response to the ecological changes in mountain lakes due to air pollution and missing data from the pre-industrial period as well as a need to quantify anthropic impact on the landscape. In the present paper, we reviewed 53 publications, including research papers, monographs, conference abstracts and theses, dealing with aquatic proxies in Holocene lake sediments to identify (1) the location of surveyed sites, (2) proxies used, and (3) the object of the paleolimnological reconstructions. The vast majority (37) of the analysed paleolimnological localities (51) took place in the High Tatra Mountains, focusing on the alpine lakes of glacial origin. The most frequently used biological proxy was Chironomidae remains (44%). In contrast, Cladocera, Ostracoda, loss-on-ignition, molluscs and stable isotopes were used only in 10–12% of studies. Most studies (84%)...