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    Tytuł:
    Skomputeryzowany system weryfikacji pracy przenośników taśmowych
    Computer AIDED system for verification of belt conveyors
    Autorzy:
    Ladanyi, G.
    Nagy, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/186624.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technik Innowacyjnych EMAG
    Tematy:
    przenośniki taśmowe
    belt conveyors
    Opis:
    Przenośniki są ważnymi elementami systemów przenoszenia materiałów w wielu działach przemysłu, zwłaszcza w przemyśle wydobywczym. Energia elektryczna używana do napędzania przenośników taśmowych w kopalniach odkrywkowych jest istotnym elementem kosztów zakładu górniczego. Dlatego też każdy rodzaj oszczędności uzyskany w tym zakresie skutkuje znaczną i zauważalną obniżką stałych kosztów przedsiębiorstwa [2, 3, 4]. Aby oszczędzać energię elektryczną należy najpierw przeanalizować system napędowy, a następnie zidentyfikować punkty, w których możliwa jest oszczędność energii. Artykuł przedstawia model wspomaganego komputerowo systemu przenośnika taśmowego. Model pracuje z programem EXCEL. Wyniki uzyskane z analizy pracy programu mogą zostać użyte do wspomagania decyzji użytkowników przenośnika taśmowego. Model może być też wykorzystany do celów edukacyjnych.
    In many industries, conveyors are an important part of a material handling system especially in mining industries. Electric power that is used for driving belt conveyors of surface mines is a significant item among the costs of a mining plant [2, 3, 4]. Hence, every saving achieved in this area results in a major and remarkable reduction of the fixed costs for the company. To save electric power the best way is to first examine a driving system and identify the right point of energy saving. The paper deals with the presentation of features of a computer aided model of conveyor belt. The model was developed to run with EXCEL. The results obtained from program running can be used to help making a good decision for the users of conveyor belt. On the other hand it can be used in the education too.
    Źródło:
    Mechanizacja i Automatyzacja Górnictwa; 2012, R. 50, nr 11, 11; 37-45
    0208-7448
    Pojawia się w:
    Mechanizacja i Automatyzacja Górnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation Of Intermetallic Compounds In Sn-Cu-Ni Lead-Free Solders
    Badanie związków międzymetalicznych w bezołowiowych stopach lutowniczych Sn-Cu-Ni
    Autorzy:
    Nagy, E.
    Kristaly, F.
    Gyenes, A.
    Gacsi, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/353266.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    intermetallic
    lead-free solder
    X-ray diffraction
    Opis:
    Interfacial intermetallic compounds (IMC) play an important role in Sn-Cu lead-free soldering. The size and morphology of the intermetallic compounds formed between the lead-free solder and the Cu substrate have a significant effect on the mechanical strength of the solder joint. In the soldering process of Sn-Cu alloys, Cu6Sn5 intermetallic compounds are formed. The complex structural behaviour of Cu6Sn5 IMC is temperature- and composition-dependent and it is long since subject to scientific research. The Cu6Sn5 phase basically exists in two crystal structures: hexagonal η-Cu6Sn5 (at temperatures above 186°C) and monoclinic η’-Cu6Sn5 (at lower temperatures). In the presence of Ni in the solder, the η-η’ transformation does not occur, therefore, the η-Cu6Sn5 phase remains stable. In this study the role of Ni in the (Cu,Ni)6Sn5 intermetallic compound in Sn-Cu lead-free solders was examined. Sn-Cu alloys with different Cu content (0.5 to 1 mass%) were modified through Ni addition. The morphology of the intermetallic compounds of the modified Sn-Cu alloys was investigated by optical microscopy (OM) and scanning electron microscopy (SEM), the IMC phases were examined with X-ray diffraction method (XRD).
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1511-1515
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution of indoor radon concentrations between selected Hungarian thermal baths
    Autorzy:
    Shahrokhi, A.
    Nagy, E.
    Csordás, A.
    Somlai, J.
    Kovács, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/147307.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    AlphaGUARD
    CR-39
    EU BSS
    Hungary
    radon
    thermal bath
    Opis:
    Owing to the high potential of radon to increase the risk of lung cancer, health organizations are enforced to update their regulations and recommendations regarding indoor radon levels each year. In this study, the indoor radon concentrations of three randomly selected thermal baths in Hungary using CR-39 and an AlphaGUARD radon monitor were measured with regard to the new updated standards of the European Basic Safety Standard (EU BSS, Council Directive 2013/59/Euratom, 2014). The annual average of indoor radon concentrations in Parad Medical Bath, Igal Health Spa and Eger Turkish Bath were measured as 159 ± 19, 176 ± 27 and 301 ± 30 Bq/m3, respectively. Indoor radon concentration in all measurement locations were determined to be below the reference level, with the exception of the main pool, small pool and sparkling bath areas in the Eger Turkish Bath that were measured as 403 ± 42, 315 ± 32 and 354 ± 36 Bq/m3, respectively. In light of the results, the estimated annual average radon concentration in the thermal baths was below the EU BSS reference level of 300 Bq/m3. Personal dosimetry is required to estimate the annual effective dose from inhaled radon by the workers at the Eger Turkish Bath. This procedure is required in order to justify the application of the mitigation process of decreasing working hours, improving the ventilation rate or increasing the number of classified employees in response to the official radiation surveillance programme.
    Źródło:
    Nukleonika; 2016, 61, 3; 333-336
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of Fusarium ear infection on the maize yield and mycotoxin content (Transylvania-Romania).
    Autorzy:
    Nagy, E.
    Haş, V.
    Haş, I.
    Suciu, A.
    Florian, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2199607.pdf
    Data publikacji:
    2011-12-20
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    maize ear rot
    Fusarium infection
    mycotoxin content
    Opis:
    Maize is the host for a large number of pathogens, which invade all of its organs from the germination until being harvest, ear and grain infection often persistent even during storage. Diseases, through their symptoms reduce significantly the quantity and the quality of yield, estimated between 7-17% but, in the favorable years for this disease, they can be much greater. Fusarium diseases reduce yield value and quality by massive accumulation of Fusarium mycelium biomass (about 85%) on grain and ears and by mycotoxin contamination such as deoxynivalenol (DON), zearalenone (ZEA) and fumonisins (FUM). In this paper are presented aspects regarding the reaction of some maize hybrids under Fusarium  spp. natural and artificial infections; the effect of Fusarium  ear infection on yield, grain chemical composition, and mycotoxin content; the correlation between ear rot disease degree and yield ability, starch, protein and fat content. ANOVA evidenced the significant influence of experimental factors: infection conditions with Fusarium spp., maize genotypes, and their interaction on expression of the disease degree, yield capacity, protein, starch, fat and DON content. Average yield losses ranged between 7,0-9,3% during the experimental period. The hybrids Turda Star and Turda Favorit were more resistant to Fusarium ear rot, and Turda 165 was the most susceptible one. The artificial infection of ear with Fusarium spp. determined significantly decrease of starch and fat content and increases the protein and DON content for the most part of maize hybrids. Between rot diseased kernels and DON content a positive correlation was determined.
    Źródło:
    Plant Breeding and Seed Science; 2011, 64; 35-44
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Multicomponent Lead-Free Solders
    Autorzy:
    Gyenes, A.
    Benke, M.
    Teglas, N.
    Nagy, E.
    Gacsi, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/354696.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lead-free solder
    multi-component
    microstructure
    X-ray diffraction
    mechanical properties
    Opis:
    According to the directives (RoHS and WEEE) adopted by the European Union, lead has been banned from the manufacturing processes because of its health and environmental hazards. Therefore, the development of lead-free solders is one of the most important research areas of the electronic industry. This paper investigates multicomponent Sn-Ag-Cu based lead-free solders with different compositions. The properties of the six-component Innolot (SAC+BiSbNi) and two low-Ag containing alloys were compared with the widespread used SAC307 solder. Microstructure investigations and X-ray diffraction measurements were performed to analyze and identify the formed phases, furthermore, tensile tests and microhardness measurements were executed to determine the mechanical properties of the examined solders.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2B; 1071-1074
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preliminary results of radon survey in thermal spas in V4 countries
    Autorzy:
    Műllerová, M.
    Mazur, J.
    Blahušiak, P.
    Grządziel, D.
    Holý, K.
    Kovács, T.
    Kozak, K.
    Nagy, E.
    Neznal, M.
    Shahrokhi, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/146825.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    indoor radon
    thermal spas
    thermal water
    Opis:
    Radon concentration was measured in 11 thermal spas in Visegrad countries (Czech Republic, Hungary, Poland, and Slovakia). The results showed that in 84% of spas radon activity concentration is less than 400 Bq·m–3. However, areas with radon activity concentration exceeding 1000 Bq·m–3 were found in the Czech Republic and Slovakia as well. Preliminary analyses indicated that the highest radon activities in spas were found in places with thermal pools. Radon concentration in waters used in spas ranged from 0.5 Bq/l to 384 Bq/l. The influence of radon activity concentration in water on radon activity in the air inside the spa was observed. It was found to increase indoor radon with increasing radon in the waters. Correlation with indoor radon and radon in water was more significant for baths and less significant for pool waters. In the cases filling of the bath from water taps, significantly contribute to the increased radon was observed in the pool and bath areas of the spa.
    Źródło:
    Nukleonika; 2016, 61, 3; 303-306
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Susceptibility of lemon balm (Melissa officinalis L.) varieties to Septoria leaf spot (Septoria melissae Desm.) in Hungary
    Autorzy:
    Kovács, G.
    Zámbori-Németh, É.
    Nagy, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/12658417.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    Hungary
    plant cultivation
    herbal plant
    lemon balm
    Melissa officinalis
    Lemona cultivar
    Quedlinburger Niederliegende cultivar
    Soroksari cultivar
    plant cultivar
    septoriosis
    septoria leaf spot
    Septoria melissae
    disease susceptibility
    plant disease
    Opis:
    Lemon balm (Melissa officinalis L.) is a widely cultivated plant in Europe. Septoria melissae Desm. is the most important pathogen of lemon balm crops, which may cause serious yield loss by the severe leaf fall. As chemical control of the pathogen is restricted, alternative plant protection methods, like the use of tolerant varieties, should be taken under consideration. The goal of our work was to evaluate the susceptibility of three lemon balm varieties to Septoria leaf spot in field. The trials were carried out in 2016 and 2017 in Budapest-Soroksár, Hungary. Dynamics of infection showed characteristic sharp increase from the beginning of August in both years. The lowest infection levels were observed in cultivar ‘Lemona’. The disease incidence in the middle of August was 19% in the first year and 59% in the second year, while these values were over 40% and 70% in the other cultivars ‘Soroksári’ and ‘Quedlinburger Niederliegende’, respectively. The manifestation of symptomps was also significantly lighter on the ‘Lemona’ plants and they had the highest ratio of healthy leaves (81%) compared to the other cultivars. According to the data, weather conditions might modify the range of the differences among the cultivars. It was concluded that appropriate selection of varieties could be an effective and enviromental friendly plant protection method in the practice of lemon balm cultivation.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 1; 47-56
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical etching of Nitinol stents
    Autorzy:
    Katona, B.
    Bognar, E.
    Berta, B.
    Nagy, P.
    Hirschberg, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/307073.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    stent
    nitinol
    chemical etching
    metallic surface area
    Opis:
    At present the main cause of death originates from cardiovascular diseases. Primarily the most frequent cause is vessel closing thus resulting in tissue damage. The stent can help to avoid this. It expands the narrowed vessel section and allows free blood flow. The good surface quality of stents is important. It also must have adequate mechanical characteristics or else it can be damaged which can easily lead to the fracture of the implant. Thus, we have to consider the importance of the surface treatment of these implants. In our experiments the appropriate design was cut from a 1.041 mm inner diameter and 0.100 mm wall thickness nitinol tube by using Nd:YAG laser device. Then, the stent was subjected to chemical etching. By doing so, the burr created during the laser cutting process can be removed and the surface quality refined. In our research, we changed the time of chemical etching and monitored the effects of this parameter. The differently etched stents were subjected to microscopic analysis, mass measurement and in vivo environment tests. The etching times that gave suitable surface and mechanical features were identified.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2013, 15, 4; 3-8
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Situation and development possibilities of irrigation in Hungary
    Autorzy:
    Juhasz, C.
    Ratonyi, T.
    Harsanyi, E.
    Nagy, J.
    Szeles, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/61184.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    situation
    development possibility
    irrigation
    water resource management
    water balance
    Hungary
    Opis:
    Irrigation is one of the most important factors of surface water resources management, therefore water saving irrigation farming is desired which could promote better utilisation of the agricultural potential of Hungary. In our article we deal with the situation, problems and development possibilities of water resources management, especially with the development possibilities of irrigation farming.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2013, 1/III
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of cardiopulmonary changes during cycle and treadmill tests
    Porównanie zmian sercowo-płucnych podczas testów na rowerze i bieżni
    Autorzy:
    Nagy, D.
    Horváth, Z.
    Melczer, C.
    Derkács, E.
    Ács, P.
    Oláh, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048470.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
    Tematy:
    treadmill test
    bicycle ergometry test
    stress test
    athletes
    test na bieżni
    test ergometru rowerowego
    test wysiłkowy
    sportowcy
    Opis:
    Background. Our pilot study aimed to investigate cardiopulmonary differences between vita maxima incremental cycle and treadmill tests among elite youth cyclists. Material and methods. 8 elite youth cyclists (6 male, 2 female; age: 17.125±1.8 years) completed a cycle ergometer test using a road racing bike on a Tacx Smart Flux roller, followed by a vita maxima treadmill test 48 hours later. Aerobic capacity, cardiopulmonary, and metabolic parameters were measured during both tests. Results. Based on the paired sample t-test, and Wilcoxon signed-rank test, the maximal load values (W) on the treadmill were significantly higher (t=3.52; p<0.05) than in the cycle test. Volume of utilized oxygen (VO2; ml/min) and volume of exhaled CO2 (VCO2; ml/min) values (t=4.76 and t=3.45; p<0.05), maximal fat oxidation (Fatmax; g/day) (t=4.34; p<0.05), maximum rate of oxygen consumption (VO2max; ml/kg/min) (t=4.9; p<0.05) and rate of oxygen consumption at lactate threshold (VO2atLT; ml/kg/min) (t=4.04; p<0.05) also showed significantly higher values than in treadmill test. Pearson’s correlation study showed significant correlation between VO2atLT, and most other parameters (VO2, ventilation (VE; BTPS l/min), load at lactate threshold (load at LT), energy expenditure (EE; g/day)). Conclusions. The differences in results may be because of sport-specific adaptation to cycling and the characteristics of running and cycling, such as the different muscle contraction composition (concentric and eccentric) and different metabolic demands. These findings must be taken into account when testing cyclists on a treadmill, and planning their training loads based on these results.
    Wprowadzenie. Badanie pilotażowe miało na celu zbadanie sercowo-płucnych różnic przyrostowej vita maxima podczas testów na rowerze i bieżni przeprowadzonych wśród czołowych młodych rowerzystów. Materiał i metody. Ośmioro czołowych młodych rowerzystów (sześciu mężczyzn i dwie kobiety w wieku 17.125±1.8 roku) wykonało najpierw cykl na ergometrze rowerowym z wykorzystaniem roweru wyścigowego Tacx Smart Flux roller, a 48 godzin później test vita maxima na bieżni. Podczas obydwu testów zmierzono wydolność tlenową oraz parametry sercowo-płucne i metaboliczne. Wyniki. Na podstawie badania t par próbek i testu Wilcoxona dla par obserwacji ustalono, że maksymalne wartości obciążenia (W) na bieżni były znacząco wyższe (t=3,52; p<0,05) niż na rowerze. Wartości zużycia tlenu (VO2; ml/min) i wydalonego dwutlenku węgla (VCO2; ml/min) (t=4,76 i t=3,45; p<0,05), maksymalna oksydacja tłuszczu (Fatmax; g/dzień) (t=4,34; p=<0,05), maksymalne zużycie tlenu (VO2max; ml/kg/min) (t=4,9; p<0,05) i zużycie tlenu na progu mleczanowym (VO2atLT; ml/kg/min) (t=4,04; p<0,05) okazały się z kolei istotnie wyższe w teście na bieżni. Badanie korelacji Pearsona wykazało korelację między VO2atLT i większości pozostałych parametrów (VO2, wentylacja (VE; BTPS l/min), obciążenie na progu mleczanowym (load at LT), wydatek energetyczny (EE; g/dzień)). Wnioski. Różnice w uzyskanych wynikach mogły zostać spowodowane predyspozycjami do wykonywania konkretnego sportu, w tym wypadku jazdy na rowerze oraz różnicami między jazdą na rowerze i bieganiem w zakresie struktury kurczliwości (współśrodkowy i niewspółśrodkowy), a także różnymi wymaganiami metabolicznymi. Obserwacje muszą być uwzględnione podczas badania rowerzystów na bieżni i planowania obciążenia ich treningów.
    Źródło:
    Health Problems of Civilization; 2020, 14, 3; 228-234
    2353-6942
    2354-0265
    Pojawia się w:
    Health Problems of Civilization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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