The effect of copper doping on magnetic susceptibility and composition and crystallinity properties of Rokan River natural sand has been investigated. Before going through the ball milling process, the natural sand has been processed using an Iron Sand Separator (ISS) and Neodynium Iron Boron (NdFeb) magnets to separate magnetic and non-magnetic particles, so the result is called an ISS pr…
ZnO is an important multifunctional material for many different applications in biosensors such as light-emitting diodes (LED), UV sensors and widely used in fabrication of solar cell devices. The performance of such devices strongly depends on the nanostructures of the thin film used. This research was conducted to analyze the effect of variations in growth temperature of 70℃, 80℃, 90℃ a…
Cassava is the second largest agricultural product in Indonesia from agricultural food after rice, so cassava has the potential of raw material for industry. Cassava can be processed into potato chips. Sweet potato chips are one type of cassava that has a wet texture because the water content is 40-70% so it cannot be stored for a long time. There are several ways to make sweet potato chips las…
Fiber optic sensors have become a concern of scientists, which causes optical fibers to be widely used as strain and temperature sensors. fiber bragg grating is one type of optical fiber that has high sensitivity and transmission speed so that the use of fiber bragg grating is growing. This research aims to analyze the strain of fiber bragg grating in fluid flow using a cylindrical tube due to …
Fiber Bragg Grating (FBG) is an optical sensor component that has better performance than other optical and electronic components. FBG is small, extremely sensitivity to temperature and strain, immune to electromagnetic wave interference and multiplex-resistant. In this study, FBG was used to monitor the fluid flow rate in a pipe by analyzing the FBG’s output power. This research was des…
Indonesia has many watersheds whose utilization has not been optimal. Most of the locations of these rivers are located in remote areas. Indonesia as maritime country with a tropical climate has large sources of renewable energy, especially water and solar energy. Water energy potential in Indonesia reaches 94.3 GW and solar energy potential reaches 207.8 GWp. This innovation is the latest hybr…
Mercury detection using colorimetric methode based on color change of silver nanoparticles is simple alternative, accurate and cost-effective method. This study aims to synthesize silver nanoparticles using sentul fruit peel extract as an environmentally friend reducing gent. Silver nanoparticles were prepared by varyating the ratio of the volume of AgNO3 solution with the extract, namely, …
Physical activation temperature has significant impact to improve physical properties of activated carbon temperatures of 800ºC, 850ºC, and 900ºC for supercapacitor cell applications. In this study, the synthesis of porous carbon was carried out through several stages, that is pre-carbonization, chemical activation using ZnCl2, carbonization using N2 gas at a temperature of 600ºC, and physi…
Pollutant degradation through advanced oxidation processes requires semiconductor materials that can be provided by environmentally friendly processes. The manufacture of semiconductor materials through a biosynthetic process assisted by microwave irradiation can minimize the use of hazardous chemicals with an energy-efficient process. This study aims to synthesize ZnO semiconductors and analyz…
The development of methods for generating ordinary materials with electromagnetic wave engineering continues to be carried out for industrial purposes, especially in the telecommunications sector where communication systems require antennas to transmit and receive electromagnetic waves. The use of metamaterials as reflectors is used to penetrate the boundaries to meet the specifications an…
Fiber Bragg Grating sensor is one of the optical components that can be used in monitoring human respiratory strain, because FBG has a high sensitivity to strain. The purpose of this study is to design the FBG sensor to determine the respiratory strain on the back of the human body. The strain (ε) value was calculate at four respiratory conditions, namely normal without oxygen flow, normal usi…
ABSTRACT Mint leaves are widely used in the food industrial, beverage and medicinal products. Herbal drinks made from a mixture of mint and tea are a great demand because they have many benefits for the human body. The use of mint has specified standards to avoid side effects. Therefore, the quality control of product is a must in industry, there are some obstacles to control product quality…
The FBG (Fiber Bragg grating) sensor is a form of optical fiber strain sensor, that is widely used in biomedical applications, particularly for assessing respiratory parameters. The measurements were conducted at two conditions i.e., at breathing normally and breathing while receiving supplemental oxygen. An oxygen mask was used as a medium to position on the mask: top, center and bottom. FBG w…
Activated carbon made of red ginger leaves (Zingiber Officinale Var Rubrum) has been used as the base material for supercapacitor electrodes. The activation process made based on different concentration of zinc chloride activator. This research focuses on various concentration of ZnCl2 activator such as 0.1 M, 0.3 M, and 0.5 M. The process of making carbon electrodes made of red ginger leaves i…
Groundwater, one part of water resources is the most needed by humans for life. The availability of ground water and the increasing population growth in Tangkerang Labuai Village reguire the use of clean water. This study aims to determine the rock layers that makes up the soil and soil aquifers and the quality of groundwater. For the soil layer, it user the Schlumberger configuration geoelectr…
The composition and properties of crystallinity and magnetic susceptibility of iron oxide nanoparticles in natural sand Rokan River, Riau Province have been investigated. Natural sand samples have been processed using an Iron Sand Separator (ISS) then the product was separated between Iron Oxide and other non-ferrous oxides using Neodymium Iron Boron (NdFeB) magnets. The NdFeB product was prepa…
Student-oriented physics learning demands that students master the theories, concepts, and principles of physics which must then be constructed independently by the students themselves. Physics in learning consists of theoretical studies and observations that are interrelated and cannot be separated. When teaching Physics, there are still many teachers in schools who only emphasize physics conc…
Newton's law teaching aids that have been developed using the Arduino uno microcontroller need to add a variety of sensors. This study aims to develop learning media teaching aids Newton's law that is valid, practical, effective to be used as a medium for high school physics learning that can improve students' conceptual understanding and learning motivation. The learning media developed c…
The lack of interest and desire to learn physics causes students' cognitive abilities to be at low cognitive outcomes, namely only at the level of remembering, understanding and applying based on the questions given. Wave material, especially Traveling Waves and also Stationary Waves, is an abstract material. The abstract means that the material of traveling waves and stationary waves is a…