Abstrak: Abstract: This study aims to determine students' science process skills by applying the guided inquiry learning model to the substance pressure material. The research method used is a quasy experiment with a Posttest Only Control Design design. The population of this research was all students of class VIII SMPN 1 Pekanbaru. The sample was selected two classes randomly from a homog…
Abstract: The learning tools developed are contextual learning tools on global warming material for class XI SMA, consisting of a Learning Implementation Plan (RPP), Student Worksheets (LKPD), and Learning Outcomes Test. The purpose of this study was to determine the validity of contextual learning tools on global warming material. This type of research is research and development (R&D) wi…
Abstract. This research aims to produce a prototype of a uniform circular motion learning media based on Arduino Uno microcontroller. The research design uses the Research and Development (R&D) method by using the 4D model which includes: (1) define, (2) design, (3) develop, and (4) disseminate. This research was conducted only at the design stage. The results showed that the accuracy of t…
Abstract: This research’s goal is to develop learning video with a learning device using the flipped classroom approach on kinetic gas theory intended for students in the 11th grade mathematics and science of high school. This research uses type ADDIE (analysis, design, development, implementation, and evaluation) research and development method wherein this research is limited to not use…
Physiologically, the heart is one of the most vital organs in the body compared to other organs. heart disease is preceded by an indication of the work abnormality that can be observed from the rhythm that occurs. By implementing a warning system for heart defects, the condition and treatment can be known quickly. To detect a work abnormality of the heart, it is necessary to know the work …
Water pollution due to waste can reduce the level of water quality. Preventive measures need to be taken to reduce the spread of the impact of decreasing water quality. One of the water quality parameters is the level of dissolved oxygen (Dissolved Oxygen / DO) contained in the water system. The DO measurement method used is Biochip G-based Biosensor that can perform DO measurements direct…
Ferroelectric is an electronic material especially dielectric, which polarizes spontaneously and has the ability to change the direction of its internal electricity. Applications of ferroelectric films use the dielectric, pyroelectric and electrooptic properties characteristic of ferroelectric materials. Some of the most important electronic applications of ferroelectric film include: non-v…
This research is the manufacture of supercapacitors from the biomass of date seeds using a variation of the separator in the production of supercapacitor cells. This research aims to make supercapacitor electrodes from date seeds biomass. Activated carbon derived from biomass has become the most competitive electrode material for supercapacitors due to its renewable and sustainable nature.…
Supercapacitor is a popular energy storage device which is currently being investigated because it has the advantages of fast charge-discharge speed, high power density, unlimited long-term stability, low cost, and relatively easier production processes. This study aims to obtain activated carbon derived from carrot waste as an electrode material for supercapacitors application. Supercapaci…
Underground water is a problem in various big cities, including Pekanbaru City. Kecamatan Tampan as one of the most populous sub-districts in Pekanbaru has an arithmetic density of 5,148 people / km2 in 2018. This figure has increased by 6.96 percent from the previous year (Central Bureau of Statistics, 2019). The population growth rate of Kecamatan Tampan has caused the need for water reso…
This purpose of this research was to analyze the output signal of Ultrasonic Non-Destructive Testing (NDT-UT) for defect detection in materials based on the Simulink Matlab Mathematica computation method and reconstruct it based on the existing images and quantities to produced in 3D. The results of this processing are expected to clearly see the shape and location of the defects in 3D. Th…
Natural sand of west coast of Sumatera Island consists of magnetic phase such as magnetite (Fe3O4), hematite (α-Fe2O3), maghemite (γ-Fe2O3) phases or other phase namely ilminate (FeTiO3). When the particles size of these particles especially magnetic particles reduces ti nano size, then these particles posses a unique property called superparamagnetic. Due to this property, this particle …
Dye Sensitized Solar Cells (DSSC) is third generation of solar cells that can be an alternative solar cells because it has advantages, such as low manufacturing costs and simple processes. Various modifications were made to the constitution components of DSSC to obtain increased efficiency. Aluminium doped on ZnO as working electrodes and Ag doped on Pt as counter electrode is expected to …
Conventional sorting of agricultural products manually uses human labor and is subjective, automatic sorting in order to have uniform quality standards is required. This method has several advantages, including that it is non-destructive, faster, more accurate for repetitive work, and quantitative. Imaging methods can be used to detect, evaluate or inspect the external and internal state of…
Ground water is a very useful resource for living things on earth. Living things, especially humans, do various ways to meet their water needs. Efforts to utilize and develop groundwater in Rimba Panjang village really need to be done. This is because the village of Rimba Panjang has poor shallow water quality with peat lithology, which is black, acidic and cannot be consumed directly. So i…
Measurement of temperature and humidity with a control system is one of the solutions in improving the quality of various application fields such as instrumentation and especially the food storage process. Rendang is a form of processed meat that is very popular in Indonesia, especially in West Sumatra and Riau. Processing of rendang produces a high-water content of 60% to 70%, so the rend…
The objectives of this research are synthesize magnetic nanoparticles, analyze the effect of Mn dopant variations on hematite and discuss the magnetic properties of hematite nanoparticles from natural sand in the village of Logas, Kuansing Regency, Riau Province. This study used a 2-stage ball milling method for 120 hours. The ball miling sample was then doped with Mn with a concentration …
Provision of clean water on Kijang Island, Indragiri Hilir Regency is absolutely necessary. Provision of clean water can take advantage of the potential of underground water. Due to the absence of data on aquifers on Kijang Island, it is necessary to conduct a study for the interpretation of aquifers on Kijang Island. This study aims to analyze the resistivity value in the Kijang Island are…
Sensors that are widely used in industry are position and displacement sensors because position sensors have high resistance to extreme ambient temperatures and have high excitation and precession. The position sensor designed and used in this study is the Linear Variable Differential Transformers (LVDT) sensor. The advantages of the LVDT sensor are in its operation, friction free, absolut…
Iron oxide particles contained in iron sand has the potential to be applied as catalyst in methylene blue degradation process. Magnetic iron oxide particles such as hematite (α-Fe2O3), maghemite (γ-Fe2O3) and magnetite (Fe3O4) are constituents of the iron sand. Iron oxide particles on magnetic nanoparticles has superparamagnetic properties. Iron oxide particles can be used as a catalyst i…