International journal of physics & mathematics
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DS18B20 sensor calibration compared with fluke hart scientific standard sensor
Get PDFThe DS18B20 sensor calibration has been conducted using a fluke hart with a temperature chamber at the center for meteorology, climatology, and geophysics region III Denpasar. The calibration process is done by stabilizing the temperature in the chamber, then the temperature on the DS18B20 sensor and the standard thermometer in the chamber are read and compared. The setpoints used were 10 oC, 20 oC, 30 oC and 40 oC each set point was read four times. The results of the calculation of the standard deviation at each setpoint are 0,39 oC, 0,12 oC, 0,00 oC, 0,00 oC and the results of the uncertainty for each setpoint are 0,65 oC, 0,20 oC, 0,18 oC, 0,18 oC. The results of the DS18B20 sensor calibration using a fluke hart with a temperature chamber obtained the highest standard deviation value of 0,39 oC and the highest uncertainty value was 0,65 oC. This value indicates that the DS18B20 sensor calibrated with a standard tool at the 10 oC set point has not met the standard value applied by WMO, which is ±0.3 oC
Measurement of small deformations with a Mach-Zehnder interferometer
Get PDFWe show a method for measuring small deformations of solids using the principle of the Max-Zender interferometer. In the interference pattern, we find an analytical expression for the dependence of the maximum displacement of the displacement, i.e., the change in the order of interference, on the deformation force of the solid. We will show you how to determine the Joung modulus for a solid body using specific expressions. The proposed method shows that the measurement accuracy of the deformation of solids is about 10-5 m. We describe the analytical expressions obtained for the interference order in two- and three-dimensional graphical form
The proposal for developing mathematics self-study capabilities in Vietnam highschool: A theoretical study
Get PDFIn terms of general learning and Mathematics study, in particular, self-study ability is a fundamental element to promote learning efficiency. The research objective focuses on Proposing specific measures for developing the math self-study ability of high school students. Secondly, the research result reveals 5 methods for developing math self-study ability of high school students in Vietnam, including (1) Fostering motivation, attitude, sense of self-study, nurturing passion and forming knowledge about Math self-studying for students through field trips or extra-curricular activities; (2) Applying objective tests as a tool to examine and evaluate students' self-study at home; (3) Training and developing students' self-instructed math skills in terms of finding and reading documents of the specific content of Mathematics and skills in listening, communicating and taking notes in class; (4) Designing and organizing for students learning activities in the direction of practising scientific research; (5) Fostering and improving student’s self-assessment skills, mistakes correction after each process of studying a specific content. The final part of the study will discuss several issues and solutions that need to be considered when putting these teaching Mathematics measures into practice at Vietnamese high schools
About new nonlinear properties of the problem of nonlinear thermal conductivity
Get PDFIn this paper we consider a problem of nonlinear heat conduction with double nonlinearity under the action of strong absorption. For which an exact analytical solution is found, analysis of which makes it possible to reveal several characteristic features of thermal processes in nonlinear media. The following nonlinear effects are established: an inertial effect of a finite velocity of propagation of thermal disturbances, spatial heat localization, and finite time effect i.e. existence of a thermal structure in a medium with strong absorption. The following nonlinear effects are observed in the problem under consideration: the inertial effect of an ultimate speed of propagation of thermal perturbations, the effect of spatial localization of heat, and the effect of ultimate time of the thermal structure in an absorption medium
Some electrophysical properties of polycrystalline silicon obtained in a solar oven
Get PDFThe article describes the results of the study of the microstructure and some electrophysical properties of silicon obtained by re-melting in a solar oven. It was found that the granularity of polycrystalline silicon consists of Si atoms with a size of 10-15 ?m, the roughness of its surface. Decrease in specific resistance at T£600 K, increase in concentration of ionized input atoms and concentration of charge carriers, the position at ?~600÷700 K is based on the decrease in the free path of the charge carriers as a result of thermal vibrations of the crystal lattice, the situation at T?700 K K was explained by the emergence of new recombination centers specific to localized traps. Polycrystalline silicon heated by sunlight does not create a barrier effect of traps localized in the grain boundary regions from polycrystalline silicon obtained by other methods. This can expand the possibilities of creating highly efficient semiconductor devices, solar cells, thermoelectric materials for micro- and nanoelectronics, photovoltaic
Inverted classroom with learning landscapes in the teaching of music
Get PDFThe new methodological paradigm of recent decades in the area of Education, promoted by the impact of ICT, has imposed a cognitive change that involves considering innovative teaching methods in classrooms, promoting student motivation and curiosity in their learning. This scientific article proposes to demonstrate that the Inverted Classroom Model with Learning Landscapes is a methodological strategy that significantly contributes to the teaching-learning process of students and to deal with the demotivation of students, as well as optimizing the time of the subject of Music due to the few weekly frequencies of the same. It seeks to achieve digital skills, learn to learn, and values; through a proposal that focuses on the protagonist of the student and the construction of knowledge
The relevance of digital practice in Indonesian mathematics teaching and learning to improve learning outcomes: review of empirical evidence
Get PDFThis paper discusses literature for mathematics innovation in improving mathematics achievement outcomes in the era of digital. Efforts to improve student learning outcomes are closely related to teaching systems and management, including best practices of technological innovation in teaching, such as Mathematics at both the school and college level. We have compiled the relevant literature and reviewed it in search of evidence published in international scientific journals passionate about improving the quality of teaching through curriculum development with the integrity of digital innovation. This research is based on secondary data, and we process it with a phenomenological critical analysis approach, which begins with data preparation and then data organization. Scan transcripts, collect notes, and conclude. Next, explore data, create scratch code, review and revise all related themes. Finally, they presented these themes in cohesive passion writing. Considering the available data, it can be concluded that our findings from most of the studies we reviewed revealed that digital or multimedia-based teaching in the teaching of Mathematics programs was able to improve student learning outcomes. Therefore, this research will add to the treasures of teaching Mathematics in Indonesia towards the success of the millennial education, which is still suffering from a pandemic
Calculate central limit theorem for the number of empty cells after allocation of particles
Get PDFThis work belongs to the field of limit theorems for separable statistics. In particular, this paper considers the number of empty cells after placing particles in a finite number of cells, where each particle is placed in a polynomial scheme. The statistics under consideration belong to the class of separable statistics, which were previously considered in (Mirakhmedov: 1985), where necessary statements for the layout of particles in a countable number of cells were proved. The same scheme was considered in (Asimov: 1982), in which the conditions for the asymptotic normality of random variables were established. In this paper, the asymptotic normality of the statistics in question is proved and an estimate of the remainder term in the central limit theorem is obtained. In summary, the demand for separable statistics systems is growing day by day to address large-scale databases or to facilitate user access to data management. Because such systems are not only used for data entry and storage, they also describe their structure: file collection supports logical consistency; provides data processing language; restores data after various interruptions; database management systems allow multiple users
Identification of local sesars of tejakula buleleng bali with anomaly gravity data using second vertical derivative method
Get PDFResearch has been carried out related to subsurface structures in the Tejakula Buleleng Bali area and its surroundings using the gravity method. This study aims to identify the local Tejakula fault. The data used in this study is gravity anomaly data obtained from observations of Geodetic Satellite (GEOSAT). The method used in interpreting the type of disturbance uses the Second Vertical Derivative method, which then produces two-dimensional (2D) and three-dimensional (3D) fault model interpretations. Based on the results obtained in the study, the condition of the bouguer gravity anomaly value in the Tejakula area and its surroundings at the research location is in the range of 65 mGal to 185 mGal. Meanwhile, based on the Second Vertical Derivative method in determining the type of fault, the Tejakula Fault can be categorized as a mandatory fault with an upward trend
Evaluation process associated with multiple intelligences in high school students of the Ecuadorian educational system
Get PDFFormative assessment is ideal for improving teaching and learning processes. However, little is practiced systematically and a traditional approach still persists in many educational institutions that value the product rather than the process. The objective of this study is to determine the evaluative process associated with multiple intelligences in high school students from an Educational Unit in the city of Manta. Methodologically, this research project is of a mixed type with a qualitative-quantitative approach since it obtains real data that evaluates the results. To collect the information, information from primary sources will be used and will be carried out through a survey via Google to teachers and secondary information will be taken from accredited sources of virtual libraries, indexed magazines, and other academic Google publications. The results will be processed using statistical methods that will allow their analysis and interpretation. As a result of it, a set of formative evaluation activities underlying the pedagogical practice of the teacher was obtained, assessing the general process of formative evaluation of learning included in the teaching-learning processes. The process is useful for conducting a conscious and systematic formative assessment