Non-alloyed Ni3Al based alloys – preparation and evaluation of mechanical properties

The paper reports on the fabrication and mechanical properties of Ni3Al based alloy, which represents the most frequently used basic composition of nickel based intermetallic alloys for high temperature applications. The structure of the alloy was controlled through directional solidification. The samples had a multi-phase microstructure. The directionally solidified specimens were subjected to tensile tests with concurrent measurement of acoustic emission (AE). The specimens exhibited considerable room temperature ductility before fracture. During tensile testing an intensive AE was observed

Typical distribution of the solar erythemal UV radiation over Slovakia

International audienceMaps of the solar erythemal ultraviolet (UV) radiation daily doses were created for every month with horizontal resolution of 500 m at geographical domain 47.15 N?49.86 N×16.94 E?22.81 E covering the territory of Slovakia. Cloud modification factor for the UV radiation (cmfUV) was modelled utilizing relation between the cmf of total and UV radiation. The maps of the cmf factor of the UV radiation were created utilizing measurements of total radiation performed at 9 observatories during 1995?2004 period and the model of cmf dependence on altitude. Maps of clear-sky UV radiation daily dose and UV radiation daily dose affected by average cloudiness were constructed for mean monthly total ozone, their upper and lower monthly limits, for two probability levels of snow cover occurrence as criterion for the snow effect incorporation in the model and for 1 day representing typical values of every month. The map-set can be considered as an atlas of the solar erythemal UV radiation over Slovakia

In-vivo 31P-MRS of skeletal muscle and liver: A way for non-invasive assessment of their metabolism

In addition to direct assessment of high energy phosphorus containing metabolite content within tissues, phosphorus magnetic resonance spectroscopy (31P-MRS) provides options to measure phospholipid metabolites and cellular pH, as well as the kinetics of chemical reactions of energy metabolism in vivo. Even though the great potential of 31P-MR was recognized over 30 years ago, modern MR systems, as well as new, dedicated hardware and measurement techniques provide further opportunities for research of human biochemistry. This paper presents a methodological overview of the 31P-MR techniques that can be used for basic, physiological, or clinical research of human skeletal muscle and liver in vivo. Practical issues of 31P-MRS experiments and examples of potential applications are also provided. As signal localization is essential for liver 31P-MRS and is important for dynamic muscle examinations as well, typical localization strategies for 31P-MR are also described

In-vivo 31P-MRS of skeletal muscle and liver: A way for non-invasive assessment of their metabolism

In addition to direct assessment of high energy phosphorus containing metabolite content within tissues, phosphorus magnetic resonance spectroscopy (31P-MRS) provides options to measure phospholipid metabolites and cellular pH, as well as the kinetics of chemical reactions of energy metabolism in vivo. Even though the great potential of 31P-MR was recognized over 30 years ago, modern MR systems, as well as new, dedicated hardware and measurement techniques provide further opportunities for research of human biochemistry. This paper presents a methodological overview of the 31P-MR techniques that can be used for basic, physiological, or clinical research of human skeletal muscle and liver in vivo. Practical issues of 31P-MRS experiments and examples of potential applications are also provided. As signal localization is essential for liver 31P-MRS and is important for dynamic muscle examinations as well, typical localization strategies for 31P-MR are also described

Impact of increasing energy efficiency of buildings on the acoustic properties of their claddings

Interdisciplinárne rezonujúcou témou v oblasti stavebnej fyziky je snaha znižovania energetickej náročnosti budov pri súčasne čo najnižšom možnom zaťažení ekosystému. Pokrok v materiálových, konštrukčných a technologických riešeniach umožňuje kontinuálne zvyšovanie kritérií na energetickú efektívnosť budov. Tu sa však ľahko môžeme stretnúť s komplikáciami v rámci konštrukčných riešení z pohľadu stavebnej akustiky ako aj s generovaním nežiadúceho hluku implementovaním technického vybavenia budov. V tomto príspevku sme sa snažili poukázať na vybrané prípady, s ktorými sa bežne môžeme stretávať v praxi. Podkladom tohto článku boli kapitoly 5.33 a 5.5 z knižne vydanej publikácie (Rychtáriková-Chmelík-Urbán, 2019).An interdisciplinary resonant topic in the field of building physics is the effort to reduce the energy intensity of buildings while at the lowest possible load on the ecosystem. Advances in material, construction and technological solutions enable the continuous increase of criteria for the energy efficiency of buildings. Here, however, we can easily encounter complications in structural solutions from the point of view of building acoustics as well as the generation of unwanted noise by implementing the technical equipment of buildings. In this paper, we have tried to point out selected cases that we can commonly encounter in practice. This article was based on Chapters 5.33 and 5.5 of the book published (Rychtáriková-Chmelík-Urbán, 2019)

Krótka historia Wydziału Lekarskiego Historycznego Uniwersytetu Trnawskiego: 375-lecie Uniwersytetu Trnawskiego (Słowacja)

Trnava, a town in Slovakia, declared 2010 the "Year of Trnava University," in honor of the 375th anniversary of the university's founding. It was originally called "Universitas Tyrnaviensis", established in 1635 under the guidance of Cardinal Pázmány. The university was initially founded by the Jesuit Order and continues to exemplify traditional Christian values in its teaching and research activities. In 1777, Universitas Tyrnaviensis was officially closed and moved to present day Budapest, and the university doors did not open again until the foundation of the Slovak state in 1993 which prompted the reinstatement of the older college. The present day university builds on the rich heritage passed down by previous generations. The current day Faculty of Health Care and Social Work builds on the heritage and achievements of the School of Medicine, founded in 1769, which bore numerous esteemed scholars and practitioners. The current day university continues the legacies as established within the ethos of Universitas Tyrnaviensis, such as rekindling the focus on humanitarian activities, attaining high teaching standards in education and high levels in scientific research. Without doubt, the rich history and scholarly achievements of Trnava University constitute an important part of national Slovak history.Trnawa, miasto na Słowacji, rok 2010 ogłosiło "Rokiem Uniwersytetu Trnawskiego", aby tym samym uczcić 375 rocznicę założenia uczelni. Utworzona w roku 1635 pod kierownictwem kardynała Pázmány, pierwotnie nazywana ona była "Universitas Tyrnaviensis". Uniwersytet ten został założony przez Towarzystwo Jezusowe i nadal stara się w swojej działalności pedagogicznej i badawczej egzemplifikować tradycyjne wartości chrześcijańskie. W roku 1777 Universitas Tyrnaviensis został oficjalnie zamknięty i przeniesiony do Budapesztu, a drzwi uczelni zostały ponownie otwarte dopiero w momencie powstania Państwa słowackiego w 1993 roku, co pozwoliło na wznowienie funkcjonowania działalności. Dzisiejszy uniwersytet opiera się na bogatym dziedzictwie przekazanym przez poprzednie pokolenia. Obecny Wydział Nauk o Zdrowiu i Pracy Socjalnej rozwija się w oparciu o dorobek i osiągnięcia Szkoły Medycznej, założonej w 1769 roku, które wykształciła wielu wielkich uczonych i ekspertów-praktyków. Obecny Uniwersytet kontynuuje spuściznę Universitas Tyrnaviensis, opierając się na wartościach takich jak przywracanie zainteresowania działalnością humanitarną oraz osiąganie wysokich standardów nauczania w zakresie edukacji i badań naukowych. Bez wątpienia, ze względu na bogatą historię i osiągnięcia naukowe, historia Uniwersytetu Trnawskiego jest ważną częścią historii Słowacji

Virtual reality system as a tool for education

Education in the field of computer graphics is attractive, but the necessity of strong theoretical background and the amount of work needed before achieving a non-trivial output could be discouraging for many students. To cope with inherent complexity of computer graphics applications, we designed a system intended to reduce implementation burden and help the students to achieve interesting results in less time. In our labs we use an in-house virtual reality system, which has been gradually improved by the work of our students and staff for a period of more than eight years. The foundation of the system is a modular architecture that allows rapid assembly of prototyped applications as well as easy implementation of extensions. Computer graphics students with even a fundamental level of knowledge are encouraged to participate in the lab projects. Working on system that allows rapid prototyping and shortens the path to achieving interesting visible results, builds up the students’ motivation and it is a key element of a continuous improvement during the study