Screen-printed carbon electrode (SPCE) is one of the most interesting designs to combine a working (from carbon based material), reference, and counter electrode in a single-printed substrate. SPCE has been used in many electrochemical measurements due to its advantages for analysis in microscale. This paper summarises the main information about SPCE fabrication from the material and fabrication technique aspect on the flat substrate based on the work that has been published in the last 30 years. The success of SPCE fabrication is highly dependent on the composition of conductive ink which consists of conductive materials, binder, and solvents; substrate; and fabrication techniques. Among the carbon-based materials, the most widely used for SPCE fabrications are graphite, graphene, and carbon nanotubes. The frequent binder used are polymer-based materials such as polystyrene, polyaniline, poly 3,4-ethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS), and polyvinyl chloride. The solvents used for SPCE fabrication are varied including water and various organic solvents. The main characteristics of the SPCE substrate should be inert in order to avoid any interferences during electrochemical measurements. The screen printing and inkjet printing technique are preferred for SPCE fabrication due to easy fabrication and the possibility for mass production of SPCE.
The Covid-19 pandemic has impacted various fields, especially education, namely the implementation of distance learning. One of the activities carried out by teachers is the implementation of independent practicum by students so that teaching and learning activities continue to run even though the students are at home. This study aims to analyze the motion of jumping cats using a tracker application that can be used as a practicum activity independently in science subjects of motion material in grade VII by using cats that are in the environment of learners as the subject of the study. This research method uses a hands-on experimental approach by taking videos of jumping cats' motion and processing them with a tracker app. The results of data processing with the help of tracker application are processed by using Microsoft Excel program so that obtained KD, KB, TB, K and E relationship graphs cat jump has a constant or stable speed indicated by linearity graphs. In addition, data processing using a tracker application is more accurate and consistent compared to the acceleration value by manually calculating so that it can be concluded the use of application-assisted jumping cat video analysis is worth using in science learning.
Experiments have been carried out on determining the value of the moment of inertia of a hollow cylinder. This study aims to analyze the value of the moment of inertia with variations in the radius of the hollow cylinder using the Phyphox Application (Physical Phone Experiment). This research is experimental. The tools and material used area 1-meter longboard, three hollow cylinders with different radius sizes but the same mass, smartphone, laptop, caliper, and balance.The experiment of rolling motion on a hollow cylinder on an inclined plane is assisted by data processing in a Phyphoxapplication. From the experiment, the result of the moment of inertia value from data processing is 4.89 x 10-4kg.m2, 9.82 x 10-4kg.m2, 12.4 x10-4kg.m2. This research can be used as a teacher reference in teaching the topic of moments of inertia in physics learning at school. This is highly recommended for distance learning during the pandemic so that mastery of concepts is maximized. Further research is suggested that it can be tried to use other materials with other types of rigid bodies to find the moment of inertia. Further references on digital application media to assist learning are also needed considering the dynamic development of technology.
In the process of learning physics, experiments are needed that can help someone in gaining a deeper understanding of learning physics concepts and using technology in the learning process, especially learning sound waves. In this study, the aim is to be able to analyze the sound frequency with the help of Audacity software. Subjects used are 5 different cat sounds. The implementation of this research uses several tools such as a microphone, Audacity software on a laptop, and 5 cat sounds. This experiment was carried out by bringing the micro hope closer to the cat with 5 cm so that the sound was captured by the microphone which would later be transferred to the laptop and read by the audacity software. Furthermore, the data recorded in audacity were analyzed. From the results of the study, it can be said that a tool that can be used in practicum and can read and capture sound waves is effectively used in analyzing sound frequency, spectrum in the application of sound learning so that it can be used as one of the learning media in practicum on sound wave material at Junior high school.
Information and communication technology supports innovative learning and creates a learning environment to develop student competencies in the 21st century. Science learning that is integrated with ICT can equip students with ICT literacy as a provision for a future full of global competition. This study aims to analyze students' ICT literacy through learning the green consumerism environment with the help of Padlet. This study uses a quantitative descriptive method with a research sample of 32 students of grade VII SMPN 2 Bungkal taken by purposive sampling technique. Data collection techniques using interviews, questionnaires, and observation. Research instruments in the form of interviews, questionnaires, and observation sheets. The data analysis technique is a quantitative percentage to determine the category of students' ICT literacy. The results show that students' ICT literacy scores for each aspect are access 100% (very high), manage 96.88% (very high), integrate 87.5% (very high), evaluate 40.63% (very low), create 56.25% (low), and communicate 75.00% (medium). The average percentage of students' ICT literacy scores reached 76.06% in the high category. The results of this study can be used as a basis for developing integrated science learning materials with ICT to facilitate students' ICT literacy.
The spread of COVID-19 makes learning at every level of the education unit conducted from home online or distance learning. However, this is not an easy thing for teachers to do. Teachers are required to innovate in delivering materials so that students can easily understand and learn actively. Indonesia is an agricultural country where most of the population has a livelihood as farmers. As a form of contextual learning and alternative distance learning during the COVID-19 pandemic, teachers can take advantage of rice farming activities in Indonesia, known as rice Tandur (reverse planting), as physical science teaching materials. Therefore, this research aims to explore the concept of physical science contained in rice Tandur activities to be used for physical science learning. This research is descriptive research to describe the idea of physical science in rice planting activities. Data collection was conducted by documentation of rice planting activities as well as literature studies. After the documentation is collected, the analysis uses Kinovea software to find out the center of gravity (COG) and the corners formed by the limbs. Based on the results of analysis and literature studies, the concept of physics was obtained in the form of a third-class lever arm that can be used for science materials in high school classes. In addition, there is a center of gravity and torque concept in the torso's movement, which can be used as a material for learning physics in high school.
This article aims to explain the use of tracker applications on Kinetic Orbital Art (KOA) and magic gyroscope in physics learning. This study uses descriptive analysis methods. The accelerated value of earth's gravity in the kinetic circular motion of orbital art and magic gyroscopes aided analysis with tracker applications and Microsoft Excel programs. The results will be compared to get a graph of position relationships with time. From research conducted on the motion of KOA and magic gyroscope assisted tracker application obtained acceleration value is 9.44 m/s2 and 9.56 m/s2. The graph obtained from both objects is not referred to as parabolic motion on the KOA chart resembles a parabolic motion, while the motion of the magic gyroscope is referred to as circular motion. Thus, the use of tracker application on KOA and magic gyroscope can be recommended as a learning medium of Physics in schools
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