The Application of Microwave Energy in Mineral Processing – a Review

This paper presents a review of the application of microwave energy in the field of mineral processing at the Institute of Geotechnics,Slovak Academy of Sciences. The influence of microwave radiation of rocks on the failure disintegration of minerals and ores as well as,a modification of magnetic properties and thermal processing of rocks was studied. Moreover, the rate of microwave heating of minerals,effect of microwaves on coal desulphurisation and the extraction of diterpanes from coal were investigated

Page Segmentation in a Web Browser

Táto práca sa zaoberá segmentáciou webových stránok vo webovom prehliadači. V rámci práce bola vytvorená implementácia metódy Box Clustering Segmentation (BCS) v jazyku JavaScript s využitím automatizovaného prehliadača. Samotná implementácia pozostáva z dvoch hlavných krokov, ktorými sú extrakcia boxov (listových uzlov DOM) z kontextu prehliadača a ich následné zhlukovanie na základe modelu podobnosti definovanom podľa BCS. Výsledkom práce je funkčná implementácia metódy BCS použiteľná na segmentáciu stránok. Vyhodnotenie funkčnosti a presnosti implementácie prebehlo na základe porovnania s referenčnou implementáciou vytvorenou v jazyku Java.This thesis deals with the web page segmentation in a web browser. The implementation of Box Clustering Segmentation (BCS) method in JavaScript using an automated browser was created. The actual implementation consists of two main steps, which are the box extraction (leaf DOM nodes) from the browser context and their subsequent clustering based on the similarity model defined in BCS. Main result of this thesis is a functional implementation of BCS method usable for web page segmentation. The evaluation of the functionality and accuracy of the implementation is based on a comparison with a reference implementation created in Java.

3D Educational Application Using the Depth Sensors

Táto práca sa zaoberá vytvorením interaktívneho výukového systému, ktorý využitím hĺbkového senzora a projektora vykresľuje interaktívnu topografickú mapu na povrch piesku. Pri realizácii sa vychádzalo z existujúceho riešenia, ktoré predstavuje aplikácia AR Sandbox. Aplikácia okrem vizualizácie nadmorských výšok umožňuje interaktívne modelovanie terénu, pričom používateľa navádza farebným odlíšením k jeho správnemu vymodelovaniu. Bolo pripravené rozšírenie, ktoré umožňuje užívateľovi zvoliť si ľubovoľnú časť zemského povrchu pre vytváranie jej modelu. Riešenie využíva plný potenciál pôvodnej aplikácie a užívateľovi ponúka zažiť pútavú skúsenosť pri modelovaní známej oblasti zemského reliéfu či povodia rieky. Výsledkom práce je funkčný systém, nápomocný pre získavanie poznatkov z oblasti topografie a hydrológie. Užívateľské testovanie pomocou dotazníka UEQ ukázalo použiteľnosť, pričom pri dosiahnutí priemerného skóre 1.2, je riešenie na škále UEQ hodnotené ako nadpriemerný výsledok.This work deals with the creation of an interactive learning system that uses depth sensor and projector to render an interactive topographic map on the top of the sand surface. Our solution is based on the existing application AR Sandbox. Aditionally to the visualization elevation, the application allows the user to model the terrain model interactivelly, while guiding him by color distinguishment to create model correctly. We have developed an extension that allows the user to choose any part of the Earth's surface to create its model. The solution utilizes the full potential of the original application and offers the user an engaging experience in modeling the landforms or river basins. The result of this work is an operational system, which is helpful for gaining the knowledge in the field of topography and hydrology. User testing was evaluated using a UEQ questionnaire and has proven the usability, while achieving average score of 1.2, which is rated above-average on the UEQ scale.

Dispersal and larval hosts of the zigzag sawfly Aproceros leucopoda (Hymenoptera) in Slovakia, Central Europe

Background and purposeThe zigzag elm sawfly, Aproceros leucopoda (Hymenoptera), originating from Asia is being considered as one of the major pests of elm trees (Ulmus spp.) within Europe where it was first recorded in 2003. Recent investigations document the fast spread of this invasive species in many European countries. In Slovakia, A. leucopoda was first recorded in 2009 but its occurrence here has not been reported since 2009. Herein, we summarize the data from the two consecutive years about the current distribution of A. leucopoda and its hosts in Slovakia, Central Europe, focusing on infestation of elm trees by this successful invader in different altitudes.Material and methodsIn 2014 and 2015 the investigations of A. leucopoda were conducted at 101 different plots across the country. At each plot, characteristic symptoms of leaf damage, occurrence of larvae, cocoons or adults were recorded along with the geographical coordinates and the altitude, and the host trees of A. leucopoda were identified at the species level. The distribution map of A. leucopoda was drawn using the field data. The infestation of elm trees along the altitudinal gradient was analyzed with Kruskal-Wallis non-parametric analysis of variance followed by post-hoc Dunn\u27s test for multiple comparisons.Results and conclusionsThe zigzag elm sawfly A. leucopoda was observed at 31 plots (30.7%, n = 101). In elm trees examined, generally, a low level of infestation by this pest was observed. A. leucopoda was found at plots between 107 and 701 m a.s.l. The result show that the infestation level of elm trees was decreasing with increasing altitude. Although we had only a small sample of data, we assume that the altitude has a significant effect on distribution of this pest. The field elm (Ulmus minor Mill.) was the most frequently utilized host. Data collected document the establishment of this successful invader in Slovakia.</p

3D Educational Application Using the Depth Sensors

This work deals with the creation of an interactive learning system that uses depth sensor and projector to render an interactive topographic map on the top of the sand surface. Our solution is based on the existing application AR Sandbox. Aditionally to the visualization elevation, the application allows the user to model the terrain model interactivelly, while guiding him by color distinguishment to create model correctly. We have developed an extension that allows the user to choose any part of the Earth's surface to create its model. The solution utilizes the full potential of the original application and offers the user an engaging experience in modeling the landforms or river basins. The result of this work is an operational system, which is helpful for gaining the knowledge in the field of topography and hydrology. User testing was evaluated using a UEQ questionnaire and has proven the usability, while achieving average score of 1.2, which is rated above-average on the UEQ scale

Page Segmentation in a Web Browser

This thesis deals with the web page segmentation in a web browser. The implementation of Box Clustering Segmentation (BCS) method in JavaScript using an automated browser was created. The actual implementation consists of two main steps, which are the box extraction (leaf DOM nodes) from the browser context and their subsequent clustering based on the similarity model defined in BCS. Main result of this thesis is a functional implementation of BCS method usable for web page segmentation. The evaluation of the functionality and accuracy of the implementation is based on a comparison with a reference implementation created in Java

3D Educational Application Using the Depth Sensors

This work deals with the creation of an interactive learning system that uses depth sensor and projector to render an interactive topographic map on the top of the sand surface. Our solution is based on the existing application AR Sandbox. Aditionally to the visualization elevation, the application allows the user to model the terrain model interactivelly, while guiding him by color distinguishment to create model correctly. We have developed an extension that allows the user to choose any part of the Earth's surface to create its model. The solution utilizes the full potential of the original application and offers the user an engaging experience in modeling the landforms or river basins. The result of this work is an operational system, which is helpful for gaining the knowledge in the field of topography and hydrology. User testing was evaluated using a UEQ questionnaire and has proven the usability, while achieving average score of 1.2, which is rated above-average on the UEQ scale

3D Educational Application Using the Depth Sensors

Táto práca sa zaoberá vytvorením interaktívneho výukového systému, ktorý využitím hĺbkového senzora a projektora vykresľuje interaktívnu topografickú mapu na povrch piesku. Pri realizácii sa vychádzalo z existujúceho riešenia, ktoré predstavuje aplikácia AR Sandbox. Aplikácia okrem vizualizácie nadmorských výšok umožňuje interaktívne modelovanie terénu, pričom používateľa navádza farebným odlíšením k jeho správnemu vymodelovaniu. Bolo pripravené rozšírenie, ktoré umožňuje užívateľovi zvoliť si ľubovoľnú časť zemského povrchu pre vytváranie jej modelu. Riešenie využíva plný potenciál pôvodnej aplikácie a užívateľovi ponúka zažiť pútavú skúsenosť pri modelovaní známej oblasti zemského reliéfu či povodia rieky. Výsledkom práce je funkčný systém, nápomocný pre získavanie poznatkov z oblasti topografie a hydrológie. Užívateľské testovanie pomocou dotazníka UEQ ukázalo použiteľnosť, pričom pri dosiahnutí priemerného skóre 1.2, je riešenie na škále UEQ hodnotené ako nadpriemerný výsledok.This work deals with the creation of an interactive learning system that uses depth sensor and projector to render an interactive topographic map on the top of the sand surface. Our solution is based on the existing application AR Sandbox. Aditionally to the visualization elevation, the application allows the user to model the terrain model interactivelly, while guiding him by color distinguishment to create model correctly. We have developed an extension that allows the user to choose any part of the Earth's surface to create its model. The solution utilizes the full potential of the original application and offers the user an engaging experience in modeling the landforms or river basins. The result of this work is an operational system, which is helpful for gaining the knowledge in the field of topography and hydrology. User testing was evaluated using a UEQ questionnaire and has proven the usability, while achieving average score of 1.2, which is rated above-average on the UEQ scale.

Arsenic in Slovakia: Pollution Issues and the Potential of Magnetic Carbon Biomaterials for Wastewater Treatment

In Slovakia, there are a number of contaminated sites that have occurred due to intensive mining, mineral processing, metallurgical activities, chemical industry, fossil fuel combustion, and industrial agriculture in the past. This paper summarizes the occurrence, chemistry, toxicity, and mineralogy of arsenic species related to soil and water contamination in Slovakia. Four main localities with arsenic exposure were identified. Additionally, magnetically modified carbon biochar (MWchar-Mag) was tested for arsenic removal from a model solution alongside real mine water discharged from the abandoned Hauser adit. For the model aqueous solution, the maximum adsorption capacity was established at 6.2 mg of As per g of MWchar-Mag at natural pH. In the case of mine water with a concentration of arsenic at around 0.2 mg/L, adsorbent dosage, pH influence experiments, and kinetic tests were realized. The results confirmed 100% arsenic removal efficiency at pH~3&ndash;7 and extremely fast kinetics