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Wyszukujesz frazę "González, J." wg kryterium: Autor

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    Tytuł:
    Approximate mechanical behavior analysis of a thick-wall metallic liner reinforced with composites, submitted to internal pressure
    Autorzy:
    Vargas-Rojas, E.
    Palacios-Montúfar, C.
    Hernández-Moreno, H.
    González-Velázquez, J. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/200013.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanical behavior analysis
    thick-wall metallic liner
    composites
    internal pressure
    analiza zachowania
    ściana
    kompozyty
    ciśnienie wewnętrzne
    Opis:
    This study aims to simulate and to analyze the elastic and the damage behavior of a reinforced metallic liner (RML) by means of a computational tool, in order to aid in the design of high specific-stiffness and -strength barrels for heavy-duty hydraulic applications. Case studies for the program validation are undertaken using an AISI 1026 or St52.3 steel tubing reinforced with a polymeric composite of glass fiber and epoxy resin, wound in a hoop pattern. The mechanical behavior of the RML under internal pressure with no-end effects is predicted by means of strain measurements at the outermost layer. The mathematical model is based on the Classical Lamination Theory (CLT) improved with kinematic relationships that allow to introduce curvature effects. Numerical results based on experimental measurements show that the reinforcement is effective, allowing to considerably augment the maximum bearable pressure with respect to a non-reinforced metallic liner (nRML), without important weight or cost increase.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 1; 219-233
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relationships between eye fluids and blood values after exercise in lidia cattle: mineral parameters
    Autorzy:
    González-Montaña, J.R.
    Escalera-Valente, F.
    Lomillos, J.M.
    Alonso, A.J.
    Gaudioso, V.
    Alonso, M.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087493.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aqueous humour
    vitreous humour
    minerals parameters
    intraocular fluids
    blood
    metabolism
    Lidia cattle
    Źródło:
    Polish Journal of Veterinary Sciences; 2019, 3; 445-455
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical and Physical Parametric Analysis of a SEN with Flow Conditioners in Slab Continuous Casting Mold
    Autorzy:
    Gonzalez-Trejo, J.
    Real-Ramirez, C. A.
    Miranda-Tello, R.
    Rivera-Perez, F.
    Cervantes-de-la-Torre, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/351515.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    submerged entry nozzle
    fluid-flow modifiers
    continuous casting of steel
    mold flow patterns
    turbulence
    Opis:
    Some of the most recent technologies that improves the performance in continuous casting process has installed infrastructure outside the mold to modify the natural fluid flow pattern to obtain a quasi-steady condition and promote a uniform solidified shell of steel. The submerged entry nozzle distributes the liquid steel in the mold and can be used to obtain the flow symmetry condition with external geometry improvements. The fluid flow conditioners were located near the outlet ports of the nozzle. The aim of the modifiers is to impose a pseudo symmetric pattern in the upper zone of the mold by inhibiting the fluid exchange between the zones created by conditioners. This work evaluates the effect of the thickness and length of the fluid-flow modifiers on the overall performance of the submerged nozzle. These properties of the fluid-flow modifiers were normalized based on two of the geometric dimensions of the standard equipment. Numerical and physical simulations suggest that the flow modifier should be as thin as possible.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 927-946
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Normalization of Multifocal Acoustic Radiation Force Impulse Images
    Autorzy:
    González-Salido, N.
    Camacho, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/176800.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    elastography
    radiation force
    ARFI
    multifocal ARFI
    Opis:
    Imaging the tissue displacements caused by Acoustic Radiation Force Impulse (ARFI) provides qualitative tissue elasticity maps around the focus. To increase imaging range, multi-focus techniques combine several images obtained with different focal depths. Since the acoustic radiation force depends on focus depth, axial distance and steering angle, a normalization process is required before blending multi-focal ARFI images so that changes in the displayed displacements represent true tissue elasticity variations. This work analyzes the sources of displacement variability in multi-focal-zone ARFI and proposes a procedure to normalize and combine partial images. The proposal is based on the system focal configuration, transducer characteristics and global tissue parameters found by ultrasonic measurements. Performance of the proposed algorithm is experimentally evaluated with tissue mimicking phantoms.
    Źródło:
    Archives of Acoustics; 2017, 42, 2; 321-331
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Numerical Approach to Calculate the Radiation Efficiency of Baffled Planar Structures Using the Far Field
    Autorzy:
    González-Montenegro, M. A.
    Jordan, R.
    Lenzi, A.
    Arenas, J. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/176303.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    propagating matrix
    far field
    sound power
    structural finite element analysis
    Opis:
    A numerical method is developed for estimating the acoustic power of any baffled planar structure, which is vibrating with arbitrary surface velocity profile. It is well known that this parameter may be calculated with good accuracy using near field data, in terms of an impedance matrix, which is generated by the discretization of the vibrating surface into a number of elementary radiators. Thus, the sound pressure field on the structure surface can be determined by a combination of the matrix and the volume velocity vector. Then, the sound power can be estimated through integration of the acoustic intensity over a closed surface. On the other hand, few works exist in which the calculation is done in the far field from near field data by the use of radiation matrices, possibly because the numerical integration becomes complicated and expensive due to large variations of directivity of the source. In this work a different approach is used, based in the so-called Propagating Matrix, which is useful for calculating the sound pressure of an arbitrary number of points into free space, and it can be employed to estimate the sound power by integrating over a finite number of pressure points over a hemispherical surface surrounding the vibrating structure. Through numerical analysis, the advantages/disadvantages of the current method are investigated, when compared with numerical methods based on near field data. A flexible rectangular baffled panel is considered, where the normal velocity profile is previously calculated using a commercial finite element software. However, the method can easily be extended to any arbitrary shape. Good results are obtained in the low frequency range showing high computational performance of the method. Moreover, strategies are proposed to improve the performance of the method in terms of both computational cost and speed.
    Źródło:
    Archives of Acoustics; 2014, 39, 2; 249-260
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustic Absorption of Mortar Composites with Waste Material
    Autorzy:
    Stumpf González, M. A.
    Flach, M.
    Reschke Pires, J.
    Piva Kulakowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/950217.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    acoustics
    comfort
    impedance tube
    civil construction
    waste
    Opis:
    This paper presents an investigation about acoustic absorption of mortars with partial replacement of sand by waste (plywood formwork, rice husk, and thermoplastic shoe counters), examining different levels of replacement (0%, 5%, 10%, 25%, and 50%). The measurement of acoustic absorption was performed using a plane wave impedance tube with 100 mm diameter, using mortar samples of 20 mm, in frequency range 200-2000 Hz. Results demonstrated that some composite with waste presented noise reduction coefficient (NRC) above the reference mortar (NRC = 0.0343), such as a composite with 50% rice husk (NRC = 0.2757) and other with 50% of plywood waste (NRC = 0.2052). Since there is virtually no cost or difficulty to use these residuals, it may be concluded that it is a sustainable alternative to improve the acoustic comfort and reduce the impact of the waste on the environment.
    Źródło:
    Archives of Acoustics; 2013, 38, 3; 417-423
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of recent cooling in the Antarctic Peninsula on snow density and surface mass balance
    Autorzy:
    Recio-Blitz, Cayetana
    Navarro, Francisco J.
    Otero, Jaime
    Lapazaran, Javier
    Gonzalez, Sergi
    Powiązania:
    https://bibliotekanauki.pl/articles/2041910.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Antarctica
    Livingston Island
    glacier snow cover
    compaction
    air temperature
    Źródło:
    Polish Polar Research; 2018, 39, 4; 457-480
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular identification, occurrence and distribution of Thrips palmi, Frankliniella intonsa and Frankliniella cephalica (Thysanoptera: Thripidae) on cucurbit crops in Panama
    Autorzy:
    Barba-Alvarado, A.A.
    Jaen-Sanjur, J.N.
    Galipienso, L.
    Elvira-Gonzalez, L.
    Rubio, L.
    Herrera-Vasquez, J.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084752.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cucurbits
    molecular identification
    Thrips
    Opis:
    The main open-field producer regions of cucurbits (watermelon, squash, melon and cucumber) in Panama (Los Santos, Herrera and Coclé provinces) were surveyed for molecular identification, occurrence and distribution of Thrips palmi (the most important pest thrip species on cucurbits in Panama), Frankliniella intonsa and Frankliniella cephalica during the growing seasons of 2009 to 2013 and 2017 to 2018. Forty plots were surveyed and DNA extracts of 186 thrips (larvae and adults) were analyzed by multiplex PCR, using a set of T. palmi-specific primers in combination with a set of insect-universal primers. DNA extracts corresponding to 174 individual thrips (93.5%) rendered both PCR products of expected size with T. palmi-specific and insect-universal primers, whereas the remaining DNA extracts corresponding to 12 individual thrips (6.5%) only rendered the product of the expected size with insect-universal primers. Sequencing of those PCR products and BLAST analysis allowed for the identification of F. intonsa and F. cephalica. Thrips palmi was detected in all three provinces, while F. intonsa and F. cephalica were detected in Herrera and Los Santos provinces. To our knowledge, this is not only the first detection of F. intonsa in Panama, but also the first detection of F. cephalica in Panamanian cucurbit crops.
    Źródło:
    Journal of Plant Protection Research; 2020, 60, 1; 68-76
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Nodal Wear Model (NWM) as an alternative to understand the mechanisms of flow and wear in the blast furnace crucible
    Węzłowy Model Zużywania (NWM) jako alternatywa zrozumienia mechanizmów przepływu i zużycia wyłożenia garu wielkiego pieca
    Autorzy:
    Gonzalez, R.
    Barbes, M.
    Verdeja, L. F.
    Ruiz-Bustinza, I.
    Mochon, J.
    Duarte, R. M.
    Karbowniczek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353343.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    piec hutniczy
    palenisko
    zużycie
    martwy koks
    blast furnace
    hearth
    wear
    dead man
    Opis:
    The presence of thermocouples in the lining of crucibles has become a general practice in the new construction of blast furnaces. The Nodal Wear Model (NWM) has also emerged as an instrument that, while using experimental data, obtains nodal variables whose experimental measurement is not possible: global coefficient of pig-iron/refractory heat transfer hpig-iron/liningg-i and nodal temperature Ti. Starting from these nodal properties, the wear of the lining or the growth of scabs may be controlled, independently of the mechanisms responsible for them. In the same way, the properties and influence zone of the dead man in the hearth of the blast furnace may be calculated, along with those regions where the fluid is allowed to move without any other restrictions than the ones of the corresponding viscous flow (raceway hearth region).
    Obecność termopar w wyłożeniu garu wielkiego pieca, stało się powszechną praktyką w jego nowoczesnych konstrukcjach. Węzłowy Model Zużycia, staje się narzędziem, które korzystając z danych doświadczalnych, uzyskuje zmienne węzłowe, dla których pomiar bezpośredni jest niemożliwy: całkowity współczynnik przenikania ciepła między surówką, a wyłożeniem ogniotrwałym hsurwka/wyoenieg-i oraz temperaturę węzłową Ti. Począwszy od tych własności węzła, zużycie wyłożenia lub powiększanie się narostów, może być kontrolowane, niezależnie od mechanizmów odpowiedzialnych za ich zachodzenie. W ten sam sposób, mogą zostać wyliczone własności i wpływu martwego koksu w garze wielkiego pieca, wzdłuż obszarów, gdzie ciecz może poruszać się bez ograniczeń innych niż te odpowiadające przepływowi lepkiemu (strefa na poziomie dysz w garze pieca).
    Źródło:
    Archives of Metallurgy and Materials; 2010, 55, 4; 1113-1123
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radon measurements in groundwater mines in La Palma and El Hierro, Canary Islands (Spain)
    Autorzy:
    Santamarta, Juan C.
    Gutiérrez, Luis Enrique Hernández
    Martín, Jesica Rodríguez
    Pérez, Lina
    Bascones, Rafael J. Lario
    Moro, Ángel Morales González
    Pérez, Noelia Cruz
    Powiązania:
    https://bibliotekanauki.pl/articles/1853859.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    promieniowanie
    wody podziemne
    kopalnia
    Wyspy Kanaryjskie
    radon gas
    radiation
    groundwater
    mines
    Canary Islands
    Opis:
    In the Canary Islands, groundwater is the main source of drinking water. Groundwater mines have been the system used by the engineers of the archipelago to collect water from the ground. The Canary Islands are volcanic with soils characterized by being rich in uranium, the disintegration of which gives rise to radon gas. In this study, radon gas levels in the mines on two islands of the archipelago have been measured to study exposure to this gas in the galleries. Results show values much higher than the European regulatory limit concentrations.
    Źródło:
    Archives of Mining Sciences; 2020, 65, 4; 869-876
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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