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INDONESIA
Jurnal Mahasiswa TEUB
Published by Universitas Brawijaya
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Core Subject : Education,
Education
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Articles 2,116 Documents
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RANCANG BANGUN ALAT MONITORING INFUS BERBASIS IOT DENGAN FITUR NOTIFIKASI UNTUK PEMANTAUAN PASIEN Putri, Dian Wahyuni Karna; Zainuri, Akhmad; Muslim, Muhammad Aziz
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Abstract

Every medical procedure, includes the installation of an infusion, must face with the risks and side effects that can harm health. Misinfusion error often occur because infusion runs out prematurely, although they have been calculated according to the standard of individual fluid requirements. The main risk of improper disinfection is air embolism. In response to potential errors, an infusion monitoring device with a protection mechanism that detects run out of the infusion bag and the number of drops perminute is designed. To solve this problem, an infusion monitoring device with features capable of providing notification connected to the IoT system when droplets do not match, provides an estimate of the infusion time to run out, and provides a real-time estimate of infusion droplets when the roller clamp is rotated. When this condition occurs, the system helps prevent blood from rising into the infusion hose, acting as a protective measure to avoid entering the air into the blood vessels. This study was conducted by conducting a test on the drip sensor used by using calculations according to the applicable conditions of intravenous administration. The results of this study include accuracy of intravenous drip detection sensors (photodiodes) above 96% in actual conditions, with sensors working more accurately in dark environments. The infusion volume reading using a load cell sensor has a high accuracy of 99%, Information related to infusion volume, number of drops/minutes, estimated time of infusion, and notification of infusion warnings can also be accessed properly. Keywords: photodiode, infusion, monitoring, iot, load cell
UJI KARAKTERISTIK CAMPURAN MINYAK KELAPA SAWIT DENGAN MINYAK BIJI BUNGA MATAHARI SEBAGAI ISOLASI PADA TRANSFORMATOR Putra, Deni Dwi Rahman; Dhofir, Moch.; Utomo, Teguh
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Abstract

Transformer oil is a type of liquid insulation used for insulators and coolants in transformers. Until now, the main component in insulating oil production still predominantly comes from petroleum. The availability of petroleum will increasingly run out because petroleum is a non-renewable material. Efforts are needed to reduce the use of petroleum, one way that can be done is to use vegetable oil as liquid insulation. One of the vegetable oils that can be used as liquid isolation is palm oil. However, palm oil still has a low dielectric strength, so sunflower seed oil which has a high dielectric strength is mixed so that the dielectric strength of palm oil can be increased. This research discusses the effect of adding sunflower seed oil to palm oil on the electrical properties of relative permittivity and conductivity as well as breakdown voltage. So in this research four tests will be carried out, namely water content reduction testing, relative permittivity testing, conductivity testing and breakdown voltage testing. The sunflower seed oil used uses a composition of 5%, 10%, 15%, 20%, 25%, 30%. Based on the test results that have been carried out, palm oil has a breakdown voltage value of 24.85 KV/2.5 mm. This causes the breakdown voltage value to not meet the IEC 156 standard of 30 KV/2.5 mm. Mixing sunflower seed oil with palm oil can increase the breakdown voltage value of palm oil. The more sunflower seed oil in the composition, the breakdown voltage value will also be greater. A composition of 30% sunflower seed oil has abreakdown voltage value of 44.89 KV/2.5 mm. The value of reducing water content, relative permittivity and conductivity of palm oil is quite large with values respectively 600 PPM; 3.56 F/m; 19.9 × 10^(-10) S/m. The greater the composition of the sunflower seed oil mixture, the reduction in water content, relative permittivity and conductivity will decrease. A mixture with a composition of 30% sunflower seed oil has relative permittivity and conductivity values of 300 PPM respectively; 3.2; 2.12 × 10^(-10) S/m. This shows that the greater the composition of sunflower seed oil, the better the insulating quality. When compared with Shell Diala-B mineral oil, it has a breakdown voltage of 19.61 KV/2.5 mm with a relative permittivity value of 2.95 and a conductivity value of 1.99 × 10^(-10) S/m and a water content reduction value of 0 PPM. Keywords— mixture, palm oil, sunflower seed oil, breakdown voltage, conductivity, relative permittivity
ANALISIS COVERAGE AREA OPENBTS MENGGUNAKAN USRP N210 Putra, Muhammad Daffa Ramadhan; Kusmaryanto, Sigit; Mustofa, Ali
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Abstract

The development of cellular communication technology has transformed the way we interact and access information in ourdaily lives. Cellular networks based on GSM (Global System for Mobile Communications) remain one of the dominant technologies in the telecommunications world. However, in some cases, challenges related to signal coverage still persist, especially in remote areas or those affected by disasters. This research aims to address these issues. Researchers have built a GSM network using the Open BTS system, an open-source software project that has revolutionized the way cellular networks can be implemented flexibly and affordably. The construction of Open BTS is much more affordable than building conventional BTS, and in times of disaster, communication is crucial and must be quickly available. By using Open BTS and USRP N210 hardware, there is potential toovercome signal coverage issues in GSM networks. Based on the experimental data conducted, the placement distance of Open BTS and the height placement of Open BTS antennas need to be considered. This is because the farther the distance between Open BTS and the users' mobile phones, the higher the delay experienced during call and SMS services. In this study, the furthest distance of 20 meters and a height of 3 meters resulted in an average call delay of 14.27 seconds and an average SMS delay of 34.84 seconds. Conversely, the closest distance of 5 meters and an Open BTS antenna height of 0 meters compared to the user's phone resulted in an average call delay of 9.15 seconds and an average SMS delay of 11.65 seconds. The distance and height variations of Open BTS also affect the signal strength received by the users' phones. Keywords: Mobile Communication, OpenBTS System, GSM Network, Signal Coverage, Antenna Placement Effects
SISTEM PENGENDALIAN SUHU HOTEND PADA PEMBUAT FILAMEN PET BERBAHAN BOTOL BEKAS Taftazani, Moch. Aden; Rusli, Moch.; Muttaqin, Adharul
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Abstract

Indonesia, as the fourth most populous country in the world, faces serious challenges related to the issue of plastic waste. With a total population reaching 273.8 million in 2021, Indonesia is declared as the world's second largest contributor to plastic waste after China. Every year, approximately 3.2 million tons of plastic waste are poorly managed, with much of it ending up in the ocean. This is exacerbated by the low percentage of plastic waste recycling in Indonesia, which is less than 5%. One of the most common types of plastic waste is plastic bottles, particularly those made of Polyethylene Terephthalate (PET). It is estimated that over 580 billion PET bottles were produced and consumed worldwide in 2021. Recognizing this, plastic waste, especially PET bottles, becomes a promising recycling target. Therefore, a PET filament maker machine made from recycled bottles was designed. This research focuses on designing a temperature control system for the hotend of the filament maker machine using recycled bottles. In this study, a PID controller was used with parameter determination using the Ziegler-Nichols method, specifically the first method known as the reaction curve method. The test results indicate that the temperature control system can function effectively in maintaining the system response according to the desired setpoint values, with PID controller parameter values of Kp = 27.51, Ki = 1.06, and Kd = 178.8. The system response has a settling time of 2,350 seconds, a steady-state error of 0.2%, an overshoot of 12.74%, and a recovery time of 71 seconds when subjected to disturbances. Keywords: temperature control, filament maker, PET, PID controller, Ziegler-Nichols
RANCANG BANGUN SISTEM MONITORING SUHU AIR, KETINGGIAN AIR, DAN KADAR TDS LARUTAN NUTRISI PADA TANGKI HIDROPONIK BERBASIS INTERNET OF THINGS Saputra, Andhika Rahmat; Maulana, Eka; Nurussa’adah, n/a
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Abstract

Hydroponic cultivation is a cultivation technique that utilizes water as a growing medium. The advantages of hydroponic techniques include a low possibility of pest attacks, efficient land use, soilless plant growth, increased quantity and quality of production, and better cleanliness compared to conventional agriculture. In hydroponic cultivation, important aspects to be considered are the availability of water, water temperature, and the Total Dissolved Solids (TDS) level in the nutrient solution flowing through the plant roots. In practice, manual monitoring of water availability, water temperature, and TDS levels in the nutrient solution in hydroponic tanks becomes an issue for farmers at Happy Tani farm. Manual data monitoring leads to irregular data recording, hindering the maximization of hydroponic system productivity. To address this issue, a study was conducted to design an Internet of Things-based monitoring system capable of detecting water temperature, water level, and TDS levels in hydroponic tanks. This system involves DS18B20 sensors for detecting water temperature, Ultrasonic AJ-SR04M sensors for detecting water level, and DFRobot Gravity TDS sensors for detecting TDS levels in the nutrient solution. The system can provide real-time measurement data and tank condition alerts to farmers through an Android application or website connected to the internet. The system also features datalogging on a Google Spreadsheet website for storing measurement data at regular intervals. The research involved system design, sensor testing, TDS level measurement, data transmission, and hydroponic tank condition alert systems. The results of this research indicate that the designed system is capable of transmitting data to the application and website, providing tank condition alerts, and accurate data measurement with error rates for DS18B20 sensors at 0.69%, Ultrasonic AJ-SR04M sensors at 0.5%, DFRobot Gravity TDS sensors for EC at 3.16%, and TDS at 3.37%. Keywords: hydroponic, monitoring, water temperature, water level, total dissolved solids, Internet of Things
ANALISIS PENGARUH KADAR AIR DAN CAMPURAN FENOL TERHADAP TEGANGAN TEMBUS MINYAK KEMIRI SUNAN SEBAGAI PERTIMBANGAN MINYAK ISOLASI ALTERNATIF Ardiansyah, Muhammad Doni; Dhofir, Moch.; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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This thesis discusses the enhancement of the dielectric strength of sunan candlenut oil by using phenol additives so that it can be used as an alternative liquid insulation for high voltage equipment. The increase in breakdown voltage level was achieved by adding various mixtures of phenol. Purification through heating was carried out to reduce the water content in the sunan candlenut oil. Electrical testing (breakdown voltage test circuit), physical testing (water content testing using the oven method), as well as calculating conductivity values (by measuring leakage current using a DC circuit) and permittivity (using an LCR multimeter) were conducted. These tests were performed to determine the feasibility of sunan candlenut oil as an insulating oil. The test results showed that the breakdown voltage of pure sunan candlenut oil was 11.67 kV/2.5mm, which did not meetthe SPLN 49 standard of 1982, which is 30kV/2.5mm. The addition of phenol successfully increased the breakdown voltage to 61.91 kV/2.5 mm, and with heating, it reached 67.27 kV/2.5mm. The highest breakdown voltage of 67.27 kV/2.5mm was obtained by mixing 8% phenol (32 ml) and heating the sunan candlenut oil simultaneously. The test results of relative permittivity showed values of pure sunan candlenut oil and 8% phenol-added sunan candlenut oil as 9.89 and 10.25, respectively. In the conductivity test, the values for pure sunan candlenut oil and 8% phenol-added sunan candlenut oil were 22,6×10−9 S/m and 21,6×10−9 S/m,respectively. It can be concluded that the addition of phenol can inhibit the occurrence of breakdown voltage and maintain oil stability, while heating can reduce the water content from 900 ppm to 596.7 ppm. In terms of water content, the modified sunan candlenut oil does not yet meet the maximum standard allowed by SPLN 1982, which is ≤30 ppm. However, in terms of breakdown voltage, the modified sunan candlenut oil has met the SPLN 49 standard of 1982, which is 30 kV/2.5 mm. Keyword: Phenol, water content, insulating oil, kemiri sunan oil, breakdown voltage. conductivity, relative permittivity
ANALISIS PENGARUH SUHU DAN LAMA PEMANASAN MINYAK DEDAK PADI TERHADAP TINGKAT KADAR AIR DAN TEGANGAN TEMBUS Rizal, Mohammad Iqbal Fakhrur; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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This journal discusses the effect of heating with various temperature and duration variations on rice bran oil regarding its moisture content and breakdown voltage, aiming to be used as an alternative liquid insulation oil in high-voltage equipment. Oil purification through heating is conducted to reduce the moisture content in rice bran oil with temperature variations of 40°C, 50°C, 60°C, and 70°C, and duration variations of 15 minutes, 30 minutes, 45 minutes, and 60 minutes. Electrical testing (using AC breakdown voltage test circuit with capacitive voltage divider method) and physical testing (moisture content reduction test using oven heating method (gravimetric)) are performed to determine the feasibility of rice bran oil as an alternative liquid insulation oil. The test results showed that the breakdown voltage of pure rice bran oil was 17,39 kV/2,5 mm, which did not meet the SPLN 49 standard of 1982, which is 30 kV/2,5 mm before processing. Heating the rice bran oil successfully increased the breakdown voltage to 56,26 kV/2,5 mm, achieved when the oil was treated with a heating temperature of 70°C and a heating duration of 60 minutes. It was found that heating the rice bran oil could reduce its moisture content from 1130 ppm to 624,92 ppm. Thus, it can be concluded that heating significantly affects the moisture content and breakdown voltage of rice bran oil. In terms of moisture content, rice bran oil does not yet meet the maximum standard allowed by SPLN 49 of 1982, which is 30 ppm. However, in terms of breakdown voltage, rice bran oil after heating meets the SPLN 49 standard of 1982, which is 50 kV/2,5 mm after processing. Keywords: Insulation oil, rice bran oil, moisture content, breakdown voltage.
PENINGKATAN AKURASI SISTEM PEMISAH BARANG OTOMATIS DENGAN METODE CONVOLUTIONAL NEURAL NETWORK PADA PLC SIEMENS S7-300 Angki, Larry; Rusli, Moch.; Siswojo, Bambang
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Abstract

The development of an automatic goods sorting system utilizing Convolutional Neural Network (CNN) technology on the SiemensS7-300 PLC is an innovative step to enhance efficiency and accuracy in the process of goods distribution. This system utilizes acamera sensor, Arduino Uno microcontroller, ESP32 microcontroller, Siemens S7-300 PLC, and actuators to classify and separategoods automatically based on their characteristics. An experimental research method with a quantitative approach was used toevaluate the effectiveness of this system. The implementation of Convolutional Neural Network (CNN) in the Siemens S7-300 PLCusing Ladder Diagram as the programming language can improve the separation criteria by considering relevant features of thegoods data. System testing shows that the use of CNN on the PLC can achieve a classification accuracy of up to 99.35% in 25epochs. These results indicate that the integration of CNN in the Siemens S7-300 PLC can enhance the performance of theautomatic goods sorting system, reduce the risk of errors, and improve operational efficiency in modern supply chains. Keywords: Industrial Automation, Siemens S7-300 PLC, Microcontroller, Arduino Uno, ESP32, Convolutional Neural Network,Machine Learning
REDUKSI RIPPLE TORSI MOTOR INDUKSI TIGA FASA DENGAN PENYEDERHANAAN PI-DTC Yahya, Rahulfajri Ash-Shaffan; Djuriatno, Waru; Rusli, Moch.
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Abstract

In this study, the authors conducted simulations to simplify the algorithm contained in the SVM so that performance can be improved while maintaining its low complexity. Tests were conducted using simulations on MATLAB/Simulink software. Fromthe test results, it is known that the execution speed of the simplified SVM is 0.3 seconds faster than the conventional SVM. In addition, there is a slight decrease in torque ripple by 6% in the simplified SVM. From the results of all tests, the use of simplified PI-DTC is able to reduce torque ripple and reduce PI-DTC complexity. Keywords: PI-DTC, SVM, torque ripple, complexity, Simulink
PENGARUH PERBESARAN LUAS ELEKTRODA TERHADAP PROBABILITAS TEGANGAN TEMBUS PADA DIELEKTRIK MINYAK MENGGUNAKAN SUMBER TEGANGAN TINGGI AC Latif, Nabila Fauziah; Dhofir, Moch.; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Abstract

Failure of the insulation system in electrical equipment results in breakdown voltage which can occur in a gas dielectric in theform of air or a liquid dielectric in the form of oil. The breakdown voltage that occurs in transformer oil is due to the presenceof contaminants between the two conductors that bridge the space between the two conductors imperfectly. Transformers havedifferent sizes depending on the maximum power that can be handle. The phenomenon of differences in conductor dimensionsin transformers that have different sizes is likened to electrodes with different cross-sectional area dimensions. The differencein conductor dimensions can affect the distribution of the surrounding electric field which affects the probability of breakdownvoltage. This research will describe the effect of electrode area enlargement on the probability of breakdown voltage in oildielectric using AC (Alternating Current) high voltage source. The research method used is by taking data directly conductedat the High Voltage and Application Laboratory of the Department of Electrical Engineering, Faculty of Engineering, Universitas Brawijaya. Simulation of electric field distribution was carried out using FEMM 4.2 software. The variation of cross-sectional area of the electrode rod arrangement used is A, 2A, 3A, 4A, and 5A. The data taken includes the value of oil conductivity, leakage current, and breakdown voltage. Measurement of oil conductivity using a high voltage insulation tester with output in the form of oil resistance value. Measurement of leakage current value is carried out using a test voltage variation of 2 kV, 4 kV, and 6 kV. The breakdown voltage test was carried out using the Up and Down method in 26 trials and analyzed the probability of breakdown based on the Normal Distribution (Gaussian) graph. The results obtained from this study are the greater the electrode area, the more even/homogeneous the electric field distribution, the greater the leakage current value so that the oil resistance between the electrodes is getting smaller, the larger the electrode area, the smaller the breakdown voltage value and the greater the probability of breakdown. Keywords: Shell Diala oil B, rod electrode, leakage current, probability, breakdown voltage

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