Papers by Marciano Santamaria
Physics Education, 2025
This paper presents a new and successful methodology for determining the frequency effect on capa... more This paper presents a new and successful methodology for determining the frequency effect on capacitive and inductive reactance in RC and RL series circuits. The key feature in our approach is the practical use of a smartphone as a signal generator and an oscilloscope in alternating current circuits. By generating and visualising the signal using free software applications, we could observe the capacitor's and the inductor's response to frequency variations between 0.1 and 5.0 kHz. The experimental data, analysed within the theoretical capacitive and inductive reactance model, shows excellent agreement with the expected values, instilling confidence in the reliability and feasibility of our methodology. This alignment between experimental and theoretical data not only underscores the potential use of smartphone technology in capacitive and inductive reactance studies but also highlights the practicality of our approach to experimental analysis in science and engineering.
The Physics Teacher, 2025
T he Arduino development environment, when combined with basic electrical components, is an effec... more T he Arduino development environment, when combined with basic electrical components, is an effective way to provide students with hands-on learning experiences in the areas of science, technology, engineering, and mathematics (STEM). In this article, the results of the current-voltage (I-V) behavior of an Si commercial diode, in a wide temperature range, using the Arduino board and a Shield made with basic electronic components, based on a methodology that fully automates the acquisition of the experimental data, are reported. The method used, which we have called the Arduino Shield, proved to be an efficient resource, as the I-V characteristic of the diode agreed satisfactorily with the results obtained through the traditional approach using current and voltage meters and an adjustable power supply. The tendency of the I-V curve of the Si diode, in the temperature range and current interval studied, was shown to satisfactorily follow the theoretical mathematical model suggested in the literature for this type of behavior.
The physics Teacher, 2024
T his paper presents a new and simple methodology to measure the magnitude of gravitational accel... more T his paper presents a new and simple methodology to measure the magnitude of gravitational acceleration using a smartphone magnetometer sensor. In this way, we determine the temporal behavior of the magnet's position previously fixed at different spacing along a ruler in a free-fall movement. The experimental data are adjusted within the theoretical model of the free fall of bodies to determine the magnitude of the gravitational acceleration. Results show a value close to those obtained by similar methods using other smartphone sensors and a theoretical model near Earth's surface. Thus, we show a suitable methodology for the classroom, laboratory, or home experimental and inquiry activities.
The Physics Teacher, 2024
W e report the study of an oscillating pendulum under various damping conditions. A smartphone wa... more W e report the study of an oscillating pendulum under various damping conditions. A smartphone was used as a pendulum and, at the same time, as a data recorder. Results show that the smartphone is an effective and reliable tool for performing educational activities, providing students with a variety of ways to learn new content and physical concepts. It offers the opportunity to carry out experiments in the classroom, laboratory, or at home. In the experiments performed, increasing the cross-sectional area of the pendulum increases the damping coefficient slightly, and rapidly decreases the oscillation amplitude as time passes. Results suggest that the time necessary to decrease the amplitude by half is inversely proportional to the cross-sectional area of the pendulum. As expected, there was no significant variation in the period nor the angular frequency as the amplitude changed due to the air-pendulum drag properties and the slow pendulum speed.
The physics Teacher, 2023
This article reports on characteristics that describe movement in one dimension under two differe... more This article reports on characteristics that describe movement in one dimension under two different conditions: movement in the horizontal and movement in an inclined plane. We used a magnetometer built into a smartphone to obtain and record data through a software application. The Arduino Uno board and the HC-SR04 Ultrasonic distance sensor validate the feasibility of the smartphone magnetometer technique, and results show that it has a high degree of reliability. Thus, it is an efficient resource for studying kinematics in one dimension and measuring parameters such as position, displacement, average velocity, instantaneous velocity, and acceleration. It is possible to perform polynomial and linear fittings to the data and correlate movement characteristics in one dimension, determining the equation of motion.
Scientia, 2022
This paper presents a review of fiber optic-based sensors and their main characteristics and clas... more This paper presents a review of fiber optic-based sensors and their main characteristics and classification. In the same way, the paper includes a series of applications of sensors based on fiber optics with Bragg gratings in different fields of study in research such as medicine, civil engineering, communications engineering, chemistry, and biochemistry, among others. Such sensors are developed taking advantage of certain characteristics of optical fibers, such as photosensitivity and the variation of the refractive index of their core. Applications of fiber optics in the detection of telecommunications signals are also discussed, particularly as a filter device through the usage of Bragg gratings. Due to its versatility, these optical devices have provided promising results and have become a leading technology in next generation DWDM systems, as well as in optical sensing networks.
The study of the influence of geometric factors on an oscillating pendulum under various damping ... more The study of the influence of geometric factors on an oscillating pendulum under various damping conditions is reported. Different cross-section areas perpendicular to the motion of the pendulum mass were studied. A smartphone was used as a pendulum and at the same time as a data recorder. Results show that the smartphone is an effective and reliable tool to be used when performing educational activities, and at the same time it presents students with a variety of ways for learning new content and physical concepts. It offers the opportunity to carry out experiments in the classroom, in the laboratory, or at home. In this way, the increment in the cross-section area slightly increases the damping coefficient, and rapidly decreases the oscillation amplitude as time passes. Additionally, the time necessary to decrease the amplitude by half is inversely proportional to the cross-section area of the pendulum. As expected, no significant variation in the period nor the angular frequency ...
The study of the influence of geometric factors on an oscillating pendulum under various damping ... more The study of the influence of geometric factors on an oscillating pendulum under various damping conditions is reported. Different cross-section areas perpendicular to the motion of the pendulum mass were studied. A smartphone was used as a pendulum and at the same time as a data recorder. Results show that the smartphone is an effective and reliable tool to be used when performing educational activities, and at the same time it presents students with a variety of ways for learning new content and physical concepts. It offers the opportunity to carry out experiments in the classroom, in the laboratory, or at home. In this way, the increment in the crosssection area slightly increases the damping coefficient, and rapidly decreases the oscillation amplitude as time passes. Additionally, the time necessary to decrease the amplitude by half is inversely proportional to the cross-section area of the pendulum. As expected, no significant variation in the period nor the angular frequency were found, due to the air-pendulum drag properties and to the slow pendulum speed.
We have investigated the effect of the deposition temperature in the structural parameters and th... more We have investigated the effect of the deposition temperature in the structural parameters and the metal–insulator phase transition of VO2 thin films, produced by sputtering technique in a reactive atmosphere. Samples were produced as monolayers and deposited on SiO2/Si (100) substrates at different temperatures. Structural characterization by X–ray diffraction (XRD) showed the presence of VO2 (M1) phase. The lattice parameters and the unit cell volume change slightly with increasing deposition temperature. Electrical characterization of resistance as a function of temperature using the four point method shows reversible phase transition with thermal hysteresis in all samples. As the deposition temperature increases, an increase in the transition temperature (TMIT) between 67 ° C and 73 ° C for the heating cycle is observed, along with a decrease in the variation of the electrical resistance,. Also, decreases in the variation of the electrical resistance affecting the shape and size...
RESUMEN El Cambio Climático desempeña un papel crucial en la calidad de vida y el desarrollo de l... more RESUMEN El Cambio Climático desempeña un papel crucial en la calidad de vida y el desarrollo de las actividades humanas. Esto significa que la adquisición de parámetros meteorológicos es importante para conocer los efectos que tienen sobre las personas. Se ha realizado un estudio para la selección de los sensores con mayor precisión y mejor correlación con respecto a la estación meteorológica Davis Vantage Pro 2 ubicada en el Laboratorio de Física de la Atmósfera de la Universidad de Panamá; los mismos serán utilizados en la adquisición de datos de un sistema diseñado para estudiar la estructura vertical de la Atmósfera en algún lugar de la geografía de nuestro país, que aún está por determinarse. Estos sensores fueron utilizados con la ayuda de la plataforma de hardware libre Arduino. Los parámetros atmosféricos estudiados en esta investigación fueron: temperatura, humedad relativa y presión. Los sensores más adecuados, de acuerdo al parámetro medido, fueron: SHT15 para la temperat...
We have investigated the effect of the deposition temperature in the structural parameters and th... more We have investigated the effect of the deposition temperature in the structural parameters and the metal–insulator phase transition of VO2 thin films, produced by sputtering technique in a reactive atmosphere. Samples were produced as monolayers and deposited on SiO2/Si (100) substrates at different temperatures. Structural characterization by X–ray diffraction (XRD) showed the presence of VO2 (M1) phase. The lattice parameters and the unit cell volume change slightly with increasing deposition temperature. Electrical characterization of resistance as a function of temperature using the four point method shows reversible phase transition with thermal hysteresis in all samples. As the deposition temperature increases, an increase in the transition temperature (TMIT) between 67 ° C and 73 ° C for the heating cycle is observed, along with a decrease in the variation of the electrical resistance,. Also, decreases in the variation of the electrical resistance affecting the shape and size...
Proposal Design of an Open Source Automated System for Photovoltaic Panels Characterization by Electronic Charge Method
IEEE Latin America Transactions
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Papers by Marciano Santamaria