A5067806807- Engineering and Technology Innovations
- Advanced Thermoelectric Materials and Devices
- Photonic and Optical Devices
- Heusler alloys: electronic and magnetic properties
- Advanced Fiber Optic Sensors
- Gas Sensing Nanomaterials and Sensors
- Sensor Technology and Measurement Systems
- Computer Science and Engineering
- Analytical Chemistry and Sensors
- Chalcogenide Semiconductor Thin Films
- 2D Materials and Applications
- Advanced Fiber Laser Technologies
- Experimental and Theoretical Physics Studies
- Computational Physics and Python Applications
- Mineral Processing and Grinding
- Education and Military Integration
- Agriculture and Agroindustry Studies
- Thermal Radiation and Cooling Technologies
- Transport Systems and Technology
- Anaerobic Digestion and Biogas Production
- Electrical and Bioimpedance Tomography
- STEM Education
- Advanced Sensor and Energy Harvesting Materials
- Asphalt Pavement Performance Evaluation
- ZnO doping and properties
Sepuluh Nopember Institute of Technology
2015-2024
Universitas Negeri Surabaya
2018
This paper presents a long-range displacement measurement method by using single-multi-single mode (SMS) fiber structure, attached to flexible plate between two permanent poles and the optical time domain reflectometer (OTDR)-based interrogator. The SMS structure sensors are prepared with different configurations, i.e. straight sinusoidal configurations. It is demonstrated that sensor can perform range from 0 mm 150 resolution of 0.159 mm. configuration provides better sensitivity than...
In recent years, much attention has been paid to improving the performance of asphalt binders, such as use polymers. Numerous investigations have shown that polymer modified exhibits a good resistance rutting and reduced thermal cracking. However, incompatibility between occurs when is applied in high proportion. Using pine resin obtained from trees expected one approach overcome this incompatibility. This study investigates properties biopolymer-modified consisting conventional (60/70...
Water hyacinth (Eichhornia crassipes) causes ecological and economic problems because it grows very fast quickly consumes nutrients oxygen in water bodies, affecting both the flora fauna; besides, can form blockages waterways, hindering fishing boat use. However, this plant contains bioactive compounds that be used to produce biofuels. This study investigated effect of various substrates as feedstock for biogas production. A 125-l plug-flow anaerobic digester was utilized hydraulic retention...
Historically, finding two-dimensional (2D) magnets is well known to be a difficult task due the instability against thermal spin fluctuations. Metals are also normally considered poor thermoelectric (TE) materials. Combining intrinsic magnetism in two dimensions with conducting properties, one may expect get worst for thermoelectrics. However, we will show this not always case. Here, investigate spin-dependent TE properties of monolayer chromium pnictides ($\mathrm{Cr}X$, where $X=\text{P}$,...
The straight channel optical waveguide coated with the SnO2 nanoparticle is studied as an all-optical humidity sensor. proposed sensor shows that transmission loss of increases increasing relative (RH) from 56% to 90% very good repeatability. sensitivity changes in ∼2 dB/% RH. response time 2.5 s, and recovery 3.5 s. can be divided into 3 different regions, which are correlated degree water adsorption layer. Compared previous based on SnO2, exhibits more rapid response, simpler fabrication...
One of the methods to heat up crude oil is using microwave. This paper discusses about modeling and simulation heating process by Simulation was conducted finite difference time domain (FDTD) method. In this modeling, propagation presented in a two-dimensional form with waveguide rectangular form. The used magnetron it operating at frequency 2.45 GHz. Reservoir model had dimension 10 × m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>...
Based on existing research, thermoelectric efficiency can be improved through material selection. In this study, the used is CaCO₃ doped with Mn and Co₂O₃ to form CaCo3.5Mn0.5O9 as a p-type material. The substrate glass. stages in research are synthesis, sputtering process using DC Magnetron Sputtering machine thin films, testing. synthesis includes grinding, calcination, sintering. Grinding done Ball Mill rotation speed of 250 rpm for 5 hours. Furthermore, calcination step was carried out...
Mass measuring devices have been developed by various methods. In its design, gauge the mass of object to be adjusted in good measure reach and shape. This corresponds a sensitivity that can generated measurement. One transducers for measurement detect small changes are strain gage. making sensor using gage type uniaxial with 120 ohm resistance cantilever beam length 2 cm, width 1 thickness 20μm utilizes deflection surface. The existence caused addition at one end beam. Calibrated masses as...
As the world's oil reserves are dwindling, some researchers have been prompted to make a breakthrough further improve efficiency of exploration and production. One technologies used is heating crude oil. This paper presents modeling results heat treatment on using microwave energy. Modeling conducted by assuming that diameter well 11,16 cm, source applied surface well, cut-off frequency in air 1,56 GHz. 0.91 GHz, respectively. The energy generated radiation converted into which absorbed...
A 250 nm thick pure tin film was deposited on quartz substrates by vacuum evaporation of 99.9% metal. The films were heated in a two-step annealing sequence for 3 h at 200 and 400 °C with an electric furnace to decrease their surface roughness. This process transformed the into tin(II) oxide. Subsequently, annealed five temperatures each: 600, 700, 800, 900 1000 °C. crystal structure substrate completely SnO2 600 With increase temperature °C, size lattices appeared thin film. In addition,...
Abstract The potential for solar and wind energy at YIA Airport is quite large so that it can be used as a renewable alternative source. Based on data obtained from BMKG of YIA, the average sun intensity 6.21 kWh/m 2 while speed 3.07 m/s. This hybrid to meet some electricity demand using photovoltaic modules turbines. Design turbine refers research conducted by Mihai Lates Radu Velicu (2014), which implements basic savonius type with an aspect ratio (α) 2, diameter (D) 3.50 m, number blades...
Sejak 2015 hingga saat ini luas lahan pertanian kopi di Kota Batu bertambah, dimana pada tahun seluas 109 ha, 2016 menjadi 140,1 ha dan 2017 2018 150,9 ha. Sehingga, komoditi memiliki nilai ekonomi tinggi berpeluang sangat besar dalam pemasaran. Dalam konteks ini, salah satu desa yang berpotensi pengembangan produksi adalah Desa Pesanggrahan. hal pengabdian masyarakat dilakukan untuk mengembangkan aplikasi pemasaran berbasis website Android, ditujukan khusus memasarkan produk olahan berbahan...
Optical waveguide with XY-branch structure have been proposed in this paper as all-optical logic gates. SnO2 nanomaterial utilized film material and PMMA substrate material. shows a large third order nonlinear susceptibility range of 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-10</sup> -10 xmlns:xlink="http://www.w3.org/1999/xlink">-12</sup> esu, meanwhile, glass silica fiber are only xmlns:xlink="http://www.w3.org/1999/xlink">-14</sup>...
Limited fossil fuels nowadays trigger the development of alternative energy, one which is biogas. Biogas type bioenergy in form fermented gases organic materials such as animal waste. The components present biogas and affect production are various, methane oxygen. utilization will be more optimal if both concentration (in this case oxygen concentration) can monitored. Therefore, research focused on designing monitoring system real-time. results showed that instrument was capable recording...
This research aims to perform fabrication and simulation of thermoelectric cooler module with Bismuth Telluride (Bi2Te3) semiconductor material. The results obtained from this is the higher value given current, then temperature difference generated by will be preparation semiconductors in series can produce highest difference. coefficient performance (COP) influenced several factors, among others, electrical resistance, seebeck coefficient, thermal conductance lowest consecutive values are...
Abstract The research developed a monitoring system that focuses on the development of and acquisition its readings into simple website. This was conducted in an effort to obtain data can be used for managing methane gas pollution environment. Methane ( CH 4 ) is natural consisting one carbon atom four hydrogen atoms. greenhouse gases contribute global warming, while humidity temperature increase or decrease productivity. Therefore, this research, created concentration using TGS2611 sensor,...
Abstract This research focused on cow dung digesters as measurement samples, utilizing the TGS2611 and MQ-4 sensors, both known for their affordability. The objective was to develop a low-cost gas sensor system monitoring methane concentrations through straightforward web-based data acquisition platform. DHT11 employed measure air temperature humidity. electronic circuit in this utilized voltage divider circuit. Testing performance of involved integrating it with an anaerobic digestion...