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Wyszukujesz frazę "Castillo, A." wg kryterium: Autor

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    Wyświetlanie 1-12 z 12
    Tytuł:
    Chemical Interactions to Cleanup Highly Polluted Automobile Service Station Wastewater by Bioadsorption-Coagulation-Flocculation
    Autorzy:
    Banchon, C.
    Castillo, A.
    Posligua, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/124468.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    adsorption
    agricultural wastes
    bagasse
    coconut coir
    sawdust
    sludge
    Opis:
    The present study addresses an ecofriendly solution to treat automobile service stations effluents with high concentrations of oily substances, surfactants, organic matter and heavy metals. Bioadsorption using sawdust from pine trees, sugar cane bagasse and coconut coir without any chemical modification removed colloidal contamination up to 70%. Polyaluminium chloride, ferric chloride and polyacrylamide were applied to remove dissolved and colloidal pollutants under saline conditions without change of initial pH. Both bioadsorption and coagulation-flocculation removed up to 97.8% of BOD, COD, surfactants and heavy metals at a saline concentration of 1.5% NaCl. The increase of ionic strength promoted a high sludge index and a representative cost saving in chemicals consumption of almost 70%. High levels of pollution removal with the minimal use of chemicals is herein presented.
    Źródło:
    Journal of Ecological Engineering; 2017, 18, 1; 1-10
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphological and physiological responses of Galapagos endemic tree Croton scouleri to site conditions varying through its altitudinal range
    Autorzy:
    Castillo, J.M.
    Rubio-Casal, A.E.
    Figueroa, E.
    Tye, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/41267.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Opis:
    Galapagos is a natural laboratory offering a great opportunity to study plants functional traits. This study characterises morphological and ecophysiological responses of Croton scouleri, an endemic tree that habits from humid and upper elevations to semiarid lowlands, throughout an altitudinal gradient and in a manipulative experiment. Croton scouleri trees were gradually smaller with less total leaf area due to a gradual reduction in mean leaf size, and they folded their leaves at lower elevations. These results were also recorded after cutting every deep root. Two physiological traits that allowed Croton scouleri to avoid damages to the photosynthetic apparatus were detected between 30 and 150 m a.s.l. Lower variable fluorescence (Fv) and basal fluorescence (F0) keeping constant maximum photochemical efficiency of PSII (Fv/Fm) denoted a drop in chlorophyll concentration. Concomitantly, the recorded increase in the Quantum efficiency of PSII (ΦPSII) with similar Fv/Fm means that Croton scouleri could be using cyclic electron transport as photoprotective mechanism. On the other hand, a deep root system to reach the water table allowed Croton scouleri to behave as a drought-avoider, which was reflected in: (1) unvarying water status Leaf Water Content and Relative Water Content were always higher than 69 and 58%, respectively; (2) stable and low photoinhibition levels; and (3) unvarying leaf area index. However, Croton scouleri was not able to avoid drought at altitudes lower 30 m a.s.l. where similar responses to those recorded after root cutting were recorded.
    Źródło:
    Dendrobiology; 2013, 69
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differential anti-insect activity of natural products isolated from Dodonaea viscosa Jacq. (Sapindaceae)
    Autorzy:
    Diaz, M.
    Diaz, C.E.
    Alvares, R.G.
    Gonzalez, A.
    Castillo, L.
    Gonzalez-Coloma, A.
    Seoane, G.
    Rossini, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/66684.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Botanical biopesticides constitute an important tool for Integrated Pest Management practices. Uruguay has a great potential for developing botanical biopesticides from its abundant native flora. Dodonaea viscosa Jacq. is a native Sapindaceae that in preliminary studies was shown to possess a potential deterrent activity against insect models. In this work, ethanolic extracts of the leaves of this species were studied. Bioguided fractionation and supercritical fluid extraction led to the isolation of active compounds. For that purpose four insect models were used: Epilachna paenulata, Spodoptera littoralis, Myzus persicae, and Rhopalosiphum padi, which are pests of crops of economic importance. Lupeol, stigmasterol, stigmast-7-en-3-ol, and a labdane diterpene were isolated and showed differential activity against the models.
    Źródło:
    Journal of Plant Protection Research; 2015, 55, 2
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low Field Relaxational Behavior of Taap Single Crystal (20-10$\text{}^{6}$ Hz)
    Autorzy:
    Fernández del Castillo, J. R.
    Iglesias, T.
    Przesławski, J.
    Gonzalo, J. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968856.pdf
    Data publikacji:
    1998-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    64.60.Fr
    77.80.-e
    Opis:
    Relaxational behavior of ferroelectric telluric acid ammonium phosphate crystals were investigated in the range 20 Hz to 1 MHz by means of low field measurements of ε' and tan δ in the vicinity of ferroelectric phase transitions at a number of frequencies. Results are compared with those for triglycine selenate, a much "softer" ferroelectric material. The measuring field and frequency dependence of the effective potential barrier height for domain wall motion are compared in both crystals.
    Źródło:
    Acta Physica Polonica A; 1998, 93, 3; 499-503
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal threshold detection for Málaga turbulent optical links
    Autorzy:
    Jurado-Navas, A.
    Garrido-Balsells, J. M.
    Castillo-Vázquez, M.
    Puerta-Notario, A.
    Monroy, I. T.
    Olmos, J. J. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/173418.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    atmospheric propagation
    atmospheric turbulence
    Malaga distribution
    scintillation
    Opis:
    A new and generalized statistical model, called Málaga distribution (M distribution), has been derived recently to characterize the irradiance fluctuations of an unbounded optical wave front propagating through a turbulent medium under all irradiance fluctuation conditions. As great advantages associated to that model, we can indicate that it is written in a simple tractable closed-form expression and that it is able to unify most of the proposed statistical models for free-space optical communications derived until now in the scientific literature. Based on that Málaga model, we have analyzed in this paper the role of the detection threshold in a free-space optical system employing an on-off keying modulation technique and involved in different scenarios, and taking into account the extinction ratio associated to the employed laser. First we have derived some analytical expressions for the lower-bound performance of the free-space optical system with the light intensity fading induced by turbulence obtained when the additive white Gaussian noise is not present in the system. Then, we have analyzed the optimal threshold in the system and how it changes when atmospheric conditions vary. Finally, a closed form expression for the bit error rate of that system is derived.
    Źródło:
    Optica Applicata; 2016, 46, 4; 577-595
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of sub-channel based Málaga atmospheric optical links with real β parameter
    Autorzy:
    López-González, F. J.
    Jurado-Navas, A.
    Garrido-Balsells, J. M.
    Castillo-Vázquez, M.
    Puerta-Notario, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/174807.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Malaga distribution
    generalized-K distribution
    atmospheric optical communications
    atmospheric propagation
    atmospheric turbulence
    scintillation
    Opis:
    A generalization of the Málaga atmospheric optical communications links treated as a finite number of generalized-K distributed sub-channels is analyzed in terms of outage probability and outage rate when its β parameter belongs to the set of real numbers. To the best of the author’s knowledge, this is the first time that β ∈ ℜ is considered. The new analytical expressions derived in this paper lead to a new physical and more realistic interpretation of atmospheric optical links, especially in terms of performance.
    Źródło:
    Optica Applicata; 2017, 47, 4; 545-556
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal design of membership functions of a fuzzy logic controller for an autonomous wheeled mobile robot using ant colony optimization
    Autorzy:
    Martínez, P.
    Castillo, O.
    Alanis, A.
    Garcia, M.
    Soria, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/384537.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    fuzzy control
    ant colony optimization
    autonomous mobile robots
    Opis:
    In this paper we describe the application of a Simple ACO (S-ACO) as a method of optimization for membership functions' parameters of a fuzzy logic controller (FLC) in order to find the optimal intelligent controller for an Autonomous Wheeled Mobile Robot. Simulation results show that ACO outperforms a GA in the optimization of FLCs for an autonomous mobile robot.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 1; 43-48
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of a reactive fuzzy logic controller for a mobile robot using evolutionary algorithms
    Autorzy:
    Meléndez, A.
    Castillo, O.
    Alanis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/385141.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    fuzzy control
    genetic optimization
    genetic fuzzy systems
    robotic systems
    Opis:
    This paper describes an evolutionary algorithm application for the optimization of a reactive fuzzy controller applied to mobile robot navigation. The evolutionary algorithm optimizes the fuzzy inference system and the position and number of the sensors on the robot, while trying to use the less power possible.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 4; 74-77
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An improved recommender system to avoid the persistent information overload in a university digital library
    Autorzy:
    Porcel, C.
    Morales del Castillo, J. M.
    Cobo, M. J.
    Ruiz, A. A.
    Herrera-Viedma, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/970184.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    recommender systems
    information overload
    university digital libraries
    fuzzy linguistic modeling
    Opis:
    Nowadays we are continuously bombarded with a lot of information, and because of it we have serious problems with accessing the relevant information, that is, we suffer from the information overload problems. Recommender systems have been applied successfully to avoid the information overload in different domains, but the number of electronic resources daily generated keeps growing and the problem rises again. Therefore, we find a persistent problem of information overload. In this paper we propose an improved recommender system to avoid the persistent information overload found in a University Digital Library. The idea is to include a memory to remember selected resources but not recommended to the user, and in such a way, the system could incorporate them in future recommendations to complete the set of filtered resources, for example, if there are a few resources to be recommended or if the user wishes output obtained by combination of resources selected in different recommendation rounds.
    Źródło:
    Control and Cybernetics; 2010, 39, 4; 899-923
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure, Morphology and Electrical Properties of CaTiO3 Ceramics Synthesized by the Solid-State Reaction Method
    Autorzy:
    Rocha-Rangel, E.
    López-Hernández, J.
    Castillo-Martínez, J. A.
    Osorio-Ramos, J. J.
    Calles-Arriaga, C. A.
    Estrada-Guel, I.
    Martínez-Sánchez, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/352238.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CaTiO3
    solid state synthesis
    electrical properties
    insulating ceramics
    Opis:
    In this paper, explain the preparation of CaTiO3 ceramics synthesized by the solid-state reaction method. Calcium carbonate and titanium dioxide were high energy mixed in stoichiometric amounts, and the obtained mixture was calcined at different temperatures (800, 900, 1000 and 1300ºC) for 2h. The obtained samples were characterized by measurement of particle size, Energy Dispersive X-Ray (EDX) Analysis; differential thermal analysis, X-ray diffraction and SEM images. XRD patterns indicated that CaTiO3 ceramics with the structure of perovskite is obtained from calcined powders at 1,300°C for 2h. SEM images show the formation of a very fine and homogeneous morphology. The measured values of electrical resistivity were within the typical range of insulating materials and approach values corresponding to insulating ceramics.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1749-1753
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of SrTiO3 by the Calcination of SrCO3 and TiO2 Mixtures Intensively Ground by Means of High Energy Milling
    Autorzy:
    Rocha-Rangel, Enrique
    Pech-Rodríguez, Wilian J.
    López-Hernández, Juan
    Calles-Arriaga, Carlos A.
    Armendáriz-Mireles, Eddie N.
    Castillo-Robles, José A.
    Rodríguez-García, José A.
    Powiązania:
    https://bibliotekanauki.pl/articles/356247.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    SrTiO3
    mechanochemistry
    insulating ceramics
    perovskite
    Opis:
    A SrTiO3 electroceramic with perovskite structure was produced by the calcination of a mixture of SrCO3 and TiO2 intensively grounded by high energy milling. For this purpose, raw materials were mixed in stoichiometric amounts in a planetary type mill; the obtained powder mixture was calcined for 2 h at temperatures between 800 and 1300°C. Samples resulting from the calcination were characterized by XRD, FTIR, SEM analysis and electrical measurements. From XRD, it was determined that the SrTiO3 formed presents the cubic structure of perovskite. The complete reaction for SrTiO3 compound formation occurs at 1200°C. Micrograph observations indicate the presence of a homogeneous microstructure with tiny grain size. The measured values of electrical resistivity were within the typical range of insulating materials.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 2; 621-626
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An analytical insight to investigate the research patterns in the realm of Type-2 fuzzy logic
    Autorzy:
    Vij, S.
    Jain, A.
    Tayal, D.
    Castillo, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/951726.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    scientometric analysis
    Type 2 fuzzy logic
    Type 2 fuzzy systems
    Type 2 fuzzy control
    Type 2 fuzzy set
    analiza scjentometryczna
    logika rozmyta typu 2
    systemy rozmyte typu 2
    Opis:
    Fuzzy logic has always been one of the key research areas in the field of computer science as it helps in dealing with the real world vagueness and uncertainty. In recent years, a variant of it, Type-2 Fuzzy Logic has gained enormous popularity for research purposes. In this paper, an analytical insight is provided into the research patterns of Type-2 Fuzzy logic. Web of Science has been used as the data source which consists of Science Citation Index- Expanded (SCI-E), SSCI, A&HCI and ESCI indexed research papers. 600 research papers were extracted from it in the field of Type-2 fuzzy logic from the year 2000 to 2016, which are analyzed both manually and in an automated manner. The performed study is Scientometric in nature and helps in answering research questions like control terms and top authors in this field, the growth pattern in research publications, top funding agencies and countries etc. The major goal of this study is to analyze the research work in type-2 fuzzy logic so as to track the growth of this discipline through the years and envision future trends in this area.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2018, 12, 2; 3-32
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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