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Mostrando ítems 61-70 de 143
Concepção e desenvolvimento de um medidor de impedância impulsiva de aterramentos de linhas de transmissão
(Universidade Federal de Minas GeraisUFMG, 2014-02-11)
This Ph.D dissertation presents a new grounding impedance measuring system, based on DSP (Digital Signal Processor) platform. The low-cost portable device includes a built-in voltage impulse generator, non-volatile memory ...
Growth of SrBi4Ti4O15 thin films in a microwave oven by the polymeric precursor method
(Elsevier B.V. Sa, 2008-05-08)
SrBi4Ti4O15 (SBTi) thin films were obtained by the polymeric precursor method and crystallized in a domestic microwave oven. For comparison, films were also crystallized in a conventional furnace at 700 degrees C for 2 h. ...
Effect of the microwave oven on structural, morphological and electrical properties of SrBi4Ti4O15 thin films grown on Pt/Ti/SiO2/Si substrates by a soft chemical method
(Elsevier B.V., 2008-06-01)
Thin films of SrBi4Ti4O15 (SBTi), a prototype of the Bi-layered-ferroelectric oxide family, were obtained by a soft chemical method and crystallized in a domestic microwave oven. For comparison, films were also crystallized ...
Mechanically activating formation of layered structured bismuth titanate
(Elsevier B.V., 2006-04-10)
Bismuth titanatc-Bi(4)Ti(3)O(12) (BIT) with wide application in the electronic industry as capacitors, memory devices and sensors is the simplest compound in the Aurivillius family, which consists of (Bi(2)O(2))(2+) sheets ...
Growth of SrBi4Ti4O15 thin films in a microwave oven by the polymeric precursor method
(Elsevier B.V. Sa, 2008-05-08)
SrBi4Ti4O15 (SBTi) thin films were obtained by the polymeric precursor method and crystallized in a domestic microwave oven. For comparison, films were also crystallized in a conventional furnace at 700 degrees C for 2 h. ...
Effect of the microwave oven on structural, morphological and electrical properties of SrBi4Ti4O15 thin films grown on Pt/Ti/SiO2/Si substrates by a soft chemical method
(Elsevier B.V., 2008-06-01)
Thin films of SrBi4Ti4O15 (SBTi), a prototype of the Bi-layered-ferroelectric oxide family, were obtained by a soft chemical method and crystallized in a domestic microwave oven. For comparison, films were also crystallized ...
Mechanically activating formation of layered structured bismuth titanate
(Elsevier B.V., 2006-04-10)
Bismuth titanatc-Bi(4)Ti(3)O(12) (BIT) with wide application in the electronic industry as capacitors, memory devices and sensors is the simplest compound in the Aurivillius family, which consists of (Bi(2)O(2))(2+) sheets ...
Cálculo del exponente de hurst mediante la metodología wavelets para la validación de la regla de la raíz del tiempo y su aplicación al riesgo de mercado
(Facultad de Finanzas, Gobierno y Relaciones Internacionales, 2014-12-20)
Bajo el supuesto de que una serie de retornos es independiente e idénticamente distribuida (IID), la dimensión temporal del riesgo es irrelevante. De esta forma, la volatilidad calculada sobre un intervalo de tiempo (e.g. ...
Desenvolvimento de um dispositivo detector de arritmias cardíacas
(Universidade Tecnológica Federal do ParanáCampo MouraoBrasilDepartamento Acadêmico de EletrônicaEngenharia EletrônicaUTFPR, 2020-12-07)
Cardiac arrhythmias are important indications of heart disease in patients with symptoms of cardiac problems, and if properly detected, it allows the reduction of morbidity and mortality by conducting appropriate therapeutic ...
Studying ReRAM devices at Low Earth Orbits using the LabOSat platform
(Pergamon-Elsevier Science Ltd, 2019-01)
LabOSat (acronym for “Laboratory On a Satellite”) is a type of electronic platform designed to perform experiments in harsh, remote environments. Up to now, LabOSat platforms have been used mainly for characterizing and ...