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    Wyświetlanie 1-8 z 8
    Tytuł:
    Electric motors maintenance planning from its operating variables
    Planowanie utrzymania ruchu silników elektrycznych i ich zmiennych operacyjnych
    Autorzy:
    Rodrigues, F.
    Fonseca, I.
    Farinha, J. T.
    Ferreira, L.
    Galar, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/409876.pdf
    Data publikacji:
    2017
    Wydawca:
    STE GROUP
    Tematy:
    maintenance
    planned maintenance
    electric machines
    HMI/SCADA
    utrzymanie ruchu
    planowane utrzymanie ruchu
    maszyny/urządzenia elektryczne
    Opis:
    The maintenance planning corresponds to an approach that seeks to maximize the availability of equipment and, consequently, increase the levels of competitiveness of companies by increasing production times. This paper presents a maintenance planning based on operating variables (number of hours worked, duty cycles, number of revolutions) to maximizing the availability of operation of electrical motors. The reading of the operating variables and its sampling is done based on predetermined sampling cycles and subsequently is made the data analysis through time series algorithms aiming to launch work orders before reaching the variables limit values. This approach is supported by tools and technologies such as logical applications that enable a graphical user interface for access to relevant information about their Physical Asset HMI (Human Machine Interface), including the control and supervision by acquisition through SCADA (Supervisory Control And data acquisition) data, also including the communication protocols among different logical applications.
    Planowanie utrzymania ruchu odpowiada podejściu, które ma na celu maksymalizację dostępności wyposażenia, a w konsekwencji zwiększenie poziomu konkurencyjności przedsiębiorstw przez zwiększenie czasów produkcji. W artykule przedstawiono planowanie utrzymania ruchu w oparciu o zmienne operacyjne (liczba przepracowanych godzin, cykle robocze, liczba obrotów) w celu maksymalizacji dostępności pracy silników elektrycznych. Odczytywanie zmiennych operacyjnych i pobieranie próbek odbywa się na podstawie ustalonych z góry cykli próbkowania, następnie dokonuje się analizy danych za pomocą algorytmów szeregowania czasowego mających na celu uruchomienie zleceń roboczych przed osiągnięciem zmiennych wartości dopuszczalnych. Podejście to jest wspierane przez narzędzia i technologie, takie jak aplikacje logiczne, które umożliwiają wykorzystanie graficznego interfejsu użytkownika w celu uzyskania dostępu do istotnych informacji o ich zasobach fizycznych HMI (Human Machine Interface), w tym kontroli i nadzoru przez pozyskanie z wykorzystaniem SCADA (Supervisory Control And Data Acquisition) danych, w tym również protokołów komunikacyjnych pomiędzy różnymi aplikacjami logicznymi.
    Źródło:
    Management Systems in Production Engineering; 2017, 3 (25); 205-216
    2299-0461
    Pojawia się w:
    Management Systems in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Atmospheric Aerosols Using the Lisbon Nuclear Microprobe
    Autorzy:
    Rita, E. M. C.
    Alves, L. C.
    Reis, M. A.
    Rodrigues, F.
    Fialho, P.
    Soares, J. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2029003.pdf
    Data publikacji:
    2001-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    92.20.Bk
    92.60.Mt
    78.70.En
    82.80.Yc
    Opis:
    The nuclear microprobe installed at Instituto Tecnológico e Nuclear, in Lisbon, was used in the analysis of aerosols collected at the Azores islands. Samples from two different aerosol groups were analysed. One referred to aerosols that were carried from North America and the other one contained aerosols that were carried from the Sahara desert and crossed over Europe. Coarse and fine fractions were analysed for each aerosol group and two-dimensional elemental maps were constructed, which allowed the identification of several individual particles. For particles of interest, elemental spatial correlations and dimensions were determined and point analysis was also carried out (depth information was achieved by fitting Rutherford backscattering spectra). Some of these particles are quite interesting. For instance, in the fine fraction of the aerosols that were carried from North America, particles were found with Cu and Cl in the atomic proportion 1:2 and with dimensions 15×15×15μm$\text{}^{3}$, and in the corresponding coarse fraction a particle with K and S was identified, with dimensions 28×35×30μm$\text{}^{3}$. Some differences were found between the aerosols groups. One example of these are Ti particles (fine fraction) and Rb (coarse fraction) that were identified in one group (Sahara desert and Europe), but not in the other
    Źródło:
    Acta Physica Polonica A; 2001, 100, 5; 781-788
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hypertonic saline solution (NaCl 7.2%) enhances renal excretion of acids in cattle with acute ruminal lactic acidosis
    Autorzy:
    Rodrigues, F.A.M.L.
    Minervino, A.H.H.
    Barrêto Júnior, R.A.
    Reis, L.F.
    Ferreira, R.N.F.
    Mori, C.S.
    Oliveira, F.L.C.
    Sousa, R.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087583.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    steers
    ruminal lactic acidosis
    hypertonic saline solution
    Źródło:
    Polish Journal of Veterinary Sciences; 2019, 1; 37-42
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biotic interaction between spionid polychaetes and bouchardiid brachiopods: Paleoecological, taphonomic and evolutionary implications
    Autorzy:
    Rodrigues, S.C.
    Simoes, M.G.
    Kowalewski, M.
    Petti, M.A.V.
    Nonato, E.F.
    Martinez, S.
    del Rio, C.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/21792.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    biotic interaction
    spionid polychaete
    polychaete
    bouchardiid brachiopod
    brachiopod
    paleoecology
    evolution
    Brachiopoda
    Spionidae
    Caulostrepsis
    Bouchardia
    Cenozoic
    Brazil
    Opis:
    Shells of Bouchardia rosea (Brachiopoda, Rhynchonelliformea) are abundant in Late Holocene death assemblages of the Ubatuba Bight, Brazil, SW Atlantic. This genus is also known from multiple localities in the Cenozoic fossil record of South America. A total of 1211 valves of B. rosea, 2086 shells of sympatric bivalve mollusks (14 nearshore localities ranging in depth from 0 to 30 m), 80 shells of Bouchardia zitteli, San Julián Formation, Paleogene, Argentina, and 135 shells of Bouchardia transplatina, Camacho Formation, Neogene, Uruguay were examined for bioerosion traces. All examined bouchardiid shells represent shallow−water, subtropical marine settings. Out of 1211 brachiopod shells of B. rosea, 1201 represent dead individuals. A total of 149 dead specimens displayed polychaete traces (Caulostrepsis). Live polychaetes were found inside Caulostrepsis borings in 10 life−collected brachiopods, indicating a syn−vivo interaction (Caulostrepsis traces in dead shells of B. rosea were always empty). The long and coiled peristomial palps, large chaetae on both sides of the 5th segment, and flanged pygidium found in the polychaetes are characteristic of the polychaete genus Polydora (Spionidae). The fact that 100% of the Caulostrepsis found in living brachiopods were still inhabited by the trace−making spionids, whereas none was found in dead hosts, implies active biotic interaction between the two living organisms rather than colonization of dead brachiopod shells. The absence of blisters, the lack of valve/site stereotypy, and the fact that tubes open only externally are all suggestive of a commensal relationship. These data document a new host group (bouchardiid rhynchonelliform brachiopods) with which spionids can interact (interestingly, spionid−infested sympatric bivalves have not been found in the study area despite extensive sampling). The syn−vivo interaction indicates that substantial bioerosion may occur when the host is alive. Thus, the presence of such bioerosion traces on fossil shells need not imply a prolonged post−mortem exposure of shells on the sea floor. Also, none of the Paleogene and Neogene Bouchardia species included any ichnological evidence for spionid infestation. This indicates that the Spionidae/ Bouchardia association may be geologically young, although the lack of older records may also reflect limited sampling and/or taphonomic biases.
    Źródło:
    Acta Palaeontologica Polonica; 2008, 53, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Naphthalic anhydride increases tolerance of common bean to herbicides
    Autorzy:
    Krenchinski, F.H.
    Batista de Castro, E.
    Cesto, V.J.S.
    Belapart, D.
    Rodrigues, D.M.
    Carbonari, C.A.
    Velini, E.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084688.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electron transport
    Phaseolus vulgaris
    protection
    safeners
    Opis:
    The aim of this work was to evaluate the use of the naphthalic anhydride safener on the protection of common bean cultivars BRS-Estilo (carioca) and BRS-Esplendor (black) from negative effects of herbicides. Two experiments were conducted, one for each cultivar in a complete randomized design with five replications, in a 6 × 3 factorial scheme, with six herbicide treatments: bentazon, fluazifop-P + fomesafen, bentazon + imazamox, fomesafen, cloransulam, and control without application, and three naphthalic anhydride treatments: without application, foliar application, and application via seed treatment. Visible injuries at 7, 14 and 21 days after application, photosystem II electron transport rate, and plant dry weight were evaluated. The naphthalic anhydride applied via foliar, and seed treatment reduced significantly the visible injuries in relation to the control when using the herbicides bentazon, fluazifop-P + fomesafen, bentazon + imazamox, and cloransulam. The photosystem II electron transport rate was protected by anhydride applied via foliar and seed treatment when using the herbicides bentazon, fluazifop-P + fomesafen and bentazon + + imazamox. The application of naphthalic anhydride via seed treatment protected the BRS-Estilo and BRS-Esplendor common bean cultivars, with no reductions in the plant dry weight when using the herbicides fluazifop-P + fomesafen, and fomesafen. The use of naphthalic anhydride via seed treatment and foliar application protected BRS-Estilo and BRSEsplendor common bean cultivars, from the negative effects of fluazifop-P + fomesafen and fomesafen herbicides. Thus, this practice has potential to be used in common beans.
    Źródło:
    Journal of Plant Protection Research; 2019, 59, 3; 383-391
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metric for calculation of system complexity based on its connections
    Autorzy:
    Paiva, J. R. B.
    Gomes, V. M.
    Rodrigues, B. A.
    Silva, L. F. A.
    Aniceto, B. C. M.
    Furriel, G. P.
    Calixto, W. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/136166.pdf
    Data publikacji:
    2017
    Wydawca:
    EEEIC International Barbara Leonowicz Szabłowska
    Tematy:
    complexity
    connections
    modeling
    simulation
    discrete event systems
    Opis:
    This paper proposes a methodology based on system connections to calculate its complexity. Two study cases are proposed: the dining Chinese philosophers’ problem and the distribution center. Both studies are modeled using the theory of Discrete Event Systems and simulations in different contexts were performed in order to measure their complexities. The obtained results present i) the static complexity as a limiting factor for the dynamic complexity, ii) the lowest cost in terms of complexity for each unit of measure of the system performance and iii) the output sensitivity to the input parameters. The associated complexity and performance measures aggregate knowledge about the system.
    Źródło:
    Transactions on Environment and Electrical Engineering; 2017, 2, 1; 67-73
    2450-5730
    Pojawia się w:
    Transactions on Environment and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel orchiectomy surgical procedure in donkeys (Equus asinus africanus) with parascrotal access
    Autorzy:
    Barrêto JR, R.A.
    Rodrigues, L.A.
    Albuquerque, J.P.
    de Sousa, F.J.A.
    Firmino, P.R.
    Sousa, R.S.
    Pedrosa, V.J.
    do Amaral, T.R.
    Minervino, A.H.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539181.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    inflammation
    donkeys
    peritoneal fluid
    surgical approach
    castration
    Opis:
    Donkeys are a public health concern in the Northeast region of Brazil, with thousands of stray animals. Orchiectomy is an important population control measure; however, the long postoperative period with daily treatment of open wounds in the scrotum makes it difficult to perform a large number of castrations in sheltering centers. We evaluate a novel surgical procedure for orchiectomy in donkeys using parascrotal access. Twelve donkeys were used, divided into two groups: I - submitted to orchiectomy through parascrotal surgical access (novel procedure), and II - submitted to orchiectomy through scrotal access (conventional). Postoperative evaluations consisted of a macroscopic evaluation of the surgical wound (bleeding and intensity of edema), hematological parameters, and peritoneal fluid, which occurred in both groups at the moments (M): M0 - before the surgical procedure. The others moments occurred after surgery: M12 (twelve hours); M24 (twenty-four hours); M48 (forty-eight hours); M72 (seventy-two hours); M8D (eight days); and M16D (sixteen days). The surgical techniques did not generate an important systemic inflammatory response to the point detected by the leukogram, fibrinogen dosage, and peritoneal fluid. The parascrotal technique required long surgery but promoted less bleeding, less edema, and faster healing. The techniques used did not promote sufficient systemic inflammation to alter the number of leukocytes and the fibrinogen concentration; however, evaluation of the peritoneal fluid proved to be important for evaluating inflammatory processes involving the scrotum and inguinal canal. We describe a novel surgical procedure for orchiectomy in Donkeys using a parascrotal access that promoted less risk of bleeding, shorter period of edema, and healing time, but required longer surgery time.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 2; 295-302
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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