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    Tytuł:
    Security aspects of process resource planning
    Aspekty bezpieczeństwa w zakresie planowania zasobów procesowych
    Autorzy:
    Michelberger, P.
    Horvath, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/405765.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    MRP II
    process management
    business continuity
    process security
    risk
    zarządzanie procesami
    ciągłość działania
    bezpieczeństwo procesu
    ryzyko
    Opis:
    A key contributor to corporate operations security is the availability of resources with provisions for replacement / substitution in an acceptable period of time in the event of shortage. This paper looks into three management approaches. Each has already been put into practice and well-known as well as bearing on business resource planning, which is considered by the author to complement one another and even be ready for combined use. These are the following the Manufacturing Resource Planning (MRP II), the Business Continuity Management (BCM) and the traditional Process Management (process design and control). Highest importance is attached here to security of business processes as well as, or instead of, optimization calculations. The integration and common application of extended MRP II and reinterpreted BCM can provide new opportunities in process management.
    Kluczowym czynnikiem przyczyniającym się do bezpieczeństwa operacji korporacyjnych jest dostępność zasobów wraz z procedurami dotyczącymi wymiany / zamiany w dopuszczalnym okresie czasu, w przypadku niedoborów. W artykule rozważa się trzy podejścia do zarządzania. Każde z nich zostało już wdrożone w praktyce i jest dobrze znane, a także ma wpływ na planowanie zasobów biznesowych, które autorzy uważają za wzajemnie uzupełniające się, a nawet możliwe do łącznego wykorzystania. Są nimi: planowanie zasobów wytwórczych (MRP II), zarządzanie ciągłością działania (BCM) i tradycyjne zarządzanie procesami (projektowanie i kontrola procesów). Największe znaczenie przywiązuje się do bezpieczeństwa procesów biznesowych, jak również do obliczeń optymalizacyjnych. Integracja i powszechne zastosowanie rozszerzonego systemu MRP II i ponownie zinterpretowanego zarządzania ciągłością działania, może zapewnić nowe możliwości w zarządzaniu procesami.
    Źródło:
    Polish Journal of Management Studies; 2017, 16, 1; 142-153
    2081-7452
    Pojawia się w:
    Polish Journal of Management Studies
    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
    Tytuł:
    Combined Analyses of Ion Beam Synthesized Layers in Porous Silicon
    Autorzy:
    Ramos, A. R.
    Pászti, F.
    Horváth, Z. E.
    Vázsonyi, É.
    Conde, O.
    da Silva, M. F.
    da Silva, M. R.
    Soares, J. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2028988.pdf
    Data publikacji:
    2001-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.10.-i
    61.18.Bn
    61.43.Gt
    68.55.Ln
    Opis:
    High dose ion implantation was used to form polycrystalline silicide films on porous silicon with different native concentrations of light impurities (C and O). Porous silicon layers severalμm thick were implanted with 170 keV Cr$\text{}^{+}$ ions to fluences of 3×10$\text{}^{17}$ ions/cm$\text{}^{2}$ both at room temperature and 450ºC. Similar samples were implanted with 100 keV Co$\text{}^{+}$ ions to fluences of 2×10$\text{}^{17}$ ions/cm$\text{}^{2}$ at room temperature, 350ºC, and 450ºC. The formed silicide compounds were studied by Rutherford backscattering spectrometry, elastic recoil detection, glancing incidence X-ray diffraction, and four point-probe sheet resistance measurements. Selected Co implanted samples were analysed by cross-section transmission electron microscopy. Results show that the light impurities were partially expelled from the forming silicide layer. Combining cross-section transmission electron microscopy with ion beam methods it was possible to show that, in the implanted region, the porous structure collapses and densifies during implantation, but the underlying porous silicon remains intact. The layer structure, as well as the quality and type of the formed silicide, were found to depend on the original impurity level, implantation temperature, and annealing.
    Źródło:
    Acta Physica Polonica A; 2001, 100, 5; 773-780
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reliability Examinations of SAC Lead Free Solder Material
    Autorzy:
    Koncz-Horváth, D.
    Gergely, G.
    Gyökér, Z.
    Gácsi, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/354957.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    SAC
    thermal shock test
    intermetallic layer
    crack
    Opis:
    In this paper the effect of soldering technique and thermal shock test were investigated on SAC 305 solder joints, produced by two different solder method. The solder joints were subjected to different cycle numbers up to 5000 thermal shock tests with two different thermal profiles of –30/+110°C and –40/+125°C. Microstructural properties of the tested joints were examined with the focus on intermetallic layer thickness and crack formation/propagation. Thickness of the scallop shaped Cu6Sn5 intermetallic layer was increased with increasing cycle number for both THRS and multiwave joints, but the thickening was more effective for the THRS joints. Cracks typically formed at the solder alloy/PTH barrel and the solder alloy/pin interfaces and propagated along grain boundaries and precipitations of intermetallic compound.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 925-930
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect Of Void Formation On The Reliability Of ED-XRF Measurements In Lead-Free Reflow Soldering
    Wpływ powstawania pustek na wiarygodność badań ED-XRF bezołowiowych złączy lutowanych rozpływowo
    Autorzy:
    Koncz-Horváth, D.
    Gergely, G.
    Gacsi, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/355754.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    EDXRF
    lead-free
    void
    intermetallic
    reflow
    ED-XRF
    złącze bezołowiowe
    pustka lutownicza
    lutowanie rozpływowe
    cząstka międzymetaliczna
    Opis:
    In lead-free reflow soldering, the presence of voids should be taken into account. For this reason, the effect of the applied heating profiles was examined via the characterization of voids in galvanic and immersion Sn coatings. According to EU Directive 2002/95/EC, the screening of Pb element of reflow soldering (i.e. of electrical and electronic equipment) is necessary; and the practical implementation of this measurement is largely affected by the characteristics of the solder (i.e. the presence of voids and the inhomogeneity of the solder). Comparing the results of the above two coating methods, it was found that by chemical coating more voids were formed and the detected lead content was higher than for galvanic Sn. The standard deviation of Ag and Cu concentrations was mainly influenced by the appearance of large compounds in the second case, while with chemical coating, no large compounds were formed due to the elevated number of voids.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1445-1448
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of Crack Detection Method with 2 Dimensionally Generated 3 Dimensionally Reconstructed Images in THT Solder Joints
    Autorzy:
    Gergely, G.
    Koncz-Horváth, D.
    Weltsch, Z.
    Gacsi, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/355906.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    serial sectioning
    reconstruction
    total crack length
    TCL
    through hole technology
    THT
    Opis:
    This work represents an interesting development in the detection and interpretation of crack evolution in through hole technology (THT) solder joints, which based on the development of general and common method. Serial sectioning is a useful method because it overcomes the problems associated with traditional two-dimensional metallographic techniques by providing information about (micro)structures in three-dimensions. In our work, serials sectioning with reconstruction method was utilized to visualize the 3D nature of cracks in through hole solder joint. Accurate quantitive analysis of the cracks, such as crack length, position and extension are presented with a help of the developed method: newly defined parameter and serial-cross sectioning method.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2B; 1033-1038
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Whisker-Like Formations in Sn-3.0Ag-Pb Alloys
    Autorzy:
    Koncz-Horváth, D.
    Gergely, G.
    Gacsi, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/351400.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Sn-Ag alloy
    soldering
    whisker formation
    microstructure analysis
    Opis:
    In this study, different types of whisker-like formations of Sn-3.0Ag based alloy were presented. In the experimental process the amount of Pb element was changed between 1000 and 2000 ppm, and the furnace atmosphere and cooling rate were also modified. The novelty of this work was that whisker-like formations in macro scale size were experienced after an exothermic reaction. The whiskers of larger sizes than general provided opportunities to investigate the microstructure and the concentration nearby the whiskers. In addition, the whisker-like formations from Sn-Ag based bulk material did not only consist of pure tin but tin and silver phases. The whisker-like growth appeared in several forms including hillock, spire and nodule shaped formations in accordance with parameters. It was observed that the compound phases were clustered in many cases mainly at hillocks.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2B; 1027-1031
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Ceramic Particles on the Microstructure and Mechanical Properties of SAC305 Lead-Free Soldering Material
    Autorzy:
    Kumar, Manoj Pal
    Gergely, G.
    Koncz-Horvath, D.
    Gacsi, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/356293.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    composite solder
    SiC particles
    microstructure
    wettability
    microhardness
    Opis:
    In this study, silicon carbide (SiC) reinforced lead-free solder (SAC305) was prepared by the powder metallurgy method. In this method SAC305 powder and SiC powder were milled, compressed and sintered to prepare composite solder. The composite solders were characterized by optical and scanning electron microscopy for the microstructural investigation and mechanical test. Addition of 1.5 wt.% and 2 wt.% ceramic reinforcement to the composite increased compressive strengths and microhardness up to 38% and 68% compared to those of the monolithic sample. In addition, the ceramic particles caused an up to 55% decrease in the wetting angle between the substrate and the composite solder and porosity was always increased with increase of SiC particles.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 2; 603-606
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The alleviation of the adverse effects of salt stress in the tomato plant by salicylic acid shows a time-and organ-specific antioxidant response
    Autorzy:
    Tari, I.
    Csiszar, J.
    Horvath, E.
    Poor, P.
    Takacs, Z.
    Szepesi, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/19644.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    In the last decade contradictory results have been published as to whether exogenous salicylic acid (SA) can increase salt stress tolerance in cultivated plants by inducing an antioxidant response. Salt stress injury in tomato was mitigated only in cases when the plant was hardened with a high concentration of SA (~10-4 M), low concentrations were ineffective. An efficient accumulation of Na+ in older leaves is a well-known response to salt stress in tomato plants (Solanum lycopersicum cv. Rio fuego) but it remains largely unexplored whether young and old leaves or root tissues have a distinct antioxidant status during salt stress after hardening with 10-7 M or 10-4 M SA. The determination of superoxide dismutase (SOD) and catalase (CAT) activity revealed that the SAinduced transient increases in these enzyme activities in young leaf and/or root tissues did not correlate with the salt tolerance of plants. Salt stress resulted in a tenfold increase in ascorbate peroxidase (APX) activities of young leaves and significant increases in APX and glutathione reductase (GR) activities of the roots hardened with 10-4 M SA. Both total ascorbate (AsA) and glutathione pools reached their highest levels in leaves after 10-7 M SA pre-treatment. However, in contrast to the leaves, the total pool of AsA decreased in the roots under salt stress and thus, due to low APX activity, active oxygen species were scavenged by ascorbate non-enzymatically in these tissues. The increased GR activities in the roots after treatment with 10-4 M SA enabled plants to enhance the reduced glutathione (GSH) pool and maintain the redox status of AsA under high salinity, which led to increased salt tolerance.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2015, 57, 1
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The phylogenetic position of Vincetoxicum pannonicum (Borhidi) holub supports the species’ allopolyploid hybrid origin
    Autorzy:
    Horvath, O.
    Laczko, L.
    Lisztes-Szabo, Z.
    Molnar V., A.
    Popiela, A.
    Sramko, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2130712.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    allopolyploidy
    concerted evolution
    diploidization
    gene tree incongruence
    hybridization
    Pannonian endemism
    nrITS cloning
    vulnerable species
    Opis:
    The Pannonian endemic species Vincetoxicum pannonicum was described from specimens collected in Hungary and occurs at only few locations. It is considered “vulnerable” according to the International Red List. The chromosome set was reported to be tetraploid, and the species was hypothesized to be an allotetraploid hybrid of the Balkan species V. fuscatum and the Adriatic species V. hirundinaria subsp. adriaticum. We investigated the origin of V. pannonicum using molecular phylogenetic methods by separately analyzing the multicopy nuclear ribosomal internal transcribed spacer (nrITS) and the plastid-encoded trnH-psbA DNA regions and by evaluating discrepancies between the produced gene trees. Paralogs in the nrITS region clustered in two main groups, one of which was closest to V. fuscatum, and the other included V. hirundinaria subsp. adriaticum. According to trnH-psbA sequences, V. pannonicum and V. hirundinaria subsp. adriaticum formed a single group. Our results show that V. pannonicum diversified because of hybrid speciation, in which V. fuscatum was the pollen donor. We discovered a similar placement of V. maeoticum, which suggests a further hybridization event between V. fuscatum and a species of the V. hirundinaria group. Our genome-size estimate indicates almost sixfold larger genome size in V. pannonicum compared to the maternal diploid parent, suggesting hexaploidy; however, V. pannonicum is tetraploid. This may suggest cytological diploidization in the allopolyploid V. pannonicum. We observed substantial genetic distance between V. hirundinaria subsp. adriaticum and all other subspecies of V. hirundinaria, and we therefore propose that V. adriaticum should be regarded as a separate species.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2020, 89, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transmission of second-hand smoke sensitivity and smoking attitude in a family
    Autorzy:
    Tarnoki, D.L.
    Tarnoki, A.D.
    Littvay, L.
    Lazar, Z.
    Karlinger, K.
    Molnar, A.A.
    Melicher, D.
    Garami, Z.
    Berczi, V.
    Horvath, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/52085.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2014, 21, 4
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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