Journal of Engineering and Scientific Research (JESR)
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BIVARIATE MAPPING BASED ON STUDENTS SPATIAL PREFERENCES IN THE SELECTION OF STUDENTS DORMITORY IN BANDAR LAMPUNG CITY
No full textBoarding houses or better known as boarding houses are one of the choices of residence for overseas students from outside the island or outside the city who are studying at a university. Most students who choose a boarding house as a place to live, consider cost savings and flexible rental times. The need for boarding houses is very necessary for students. The purpose of this study is to determine the strategic location of the boarding house to be inhabited based on its main preferences. In this study, the data collection technique was in the form of distributing questionnaires, in which the distribution of this questionnaire was allowed to fill in unila students. And this research uses Geoda to generate LISA maps and uses Qgis to generate bivariate maps. The results of this study are that Kampung Baru and Kampung Baru Raya are the places where most students choose boarding houses based on the distance factor and also the rental price factor for boarding houses per year. There are 25 students who choose the location of the boarding house with the campus and the price is relatively cheape
Energy Efficient Healthcare Monitoring System using 5G Task Offloading
Full text linkHealthcare expenses can be significantly reduced, and lives saved byenabling the continuous monitoring of patient health remotely using WirelessBody Sensor Networks (WBSN). However, an energy efficient mobile gateway(e.g. 5G smartphone) is required which moves with the patient in real time toprocess the data from the bio sensors without depleting the battery. Thispaper proposes a 5G based healthcare cardiovascular disease RemoteMonitoring system called 5GREM using Electrocardiogram (ECG) biosensor as a BSN device. The aim is to monitor and analyse the patient’s heartrhythms and send emergency alerts during irregularities to the nearestcaregivers, ambulance or physician to minimize heart attacks and heartfailures while saving energy. Since ECG signal execution is computerintensive, requests from the ECG sensor are either executed locally on thegateway, offloaded to nearby mobile devices or to the 5G edge whileconsidering the battery level, CPU level, transmission power, delays and taskfail rate
Correlation of BMKG with TRMM for daily and monthly rainfall series in Banten region
No full textDaily and monthly rainfall data series are necessary data for planning purposes in Civil Engineering and other fields. Incomplete rainfall data often occurs, so that rainfall data must be estimated based on rainfall data from several other nearby locations. The addition of rainfall data can lead to inaccurate planning. Rainfall data used for planning in the civil engineering sector is usually taken from the BMKG station. This data is taken from the rainfall station above the ground. Besides, that can also produce rainfall data from TRMM. Can take rainfall data from TRMM at all locations according to a coordinate of location. This rainfall data denotes an average rainfall taken from the satellite approximately 250 meters above the ground surface. An equation will be obtained by comparing the daily and monthly rainfall data from the two data sources. Based on TRMM rainfall, we can use the equation to estimate ground rainfall in a location. In this study, daily rainfall, monthly rainfall, the spectrum of daily and monthly rainfall data from BMKG are compared with rainfall and the spectrum of daily and monthly rainfall data from TRMM. The analysis results show that the monthly rainfall data from TRMM and BMKG correlate better than daily rainfall data
Utilization of Natural Zeolites and Fly Ash (Coal) Mixture Physically Activated Using Furnace As A Pellet - shaped Air Filter To Increase Engine Torque, Tecumseh TD110. 4-Stroke Petrol Motor
Full text linkAn air filter made from a mixture of natural zeolite and coal fly ash can be used to remove nitrogen (N2) and moisture (H2O) in the air. This filter can produce oxygen-rich air (O2) flowing into the combustion chamber to increase the quality of the combustion process so that complete combustion occurs and improve engine torque. In this research the filter was made from a physically activated mixture of natural zeolite and fly ash through heating in a furnace for 1 hour with temperature variations (200oC, 250oC, 300oC, 350oC), mass variations (50%, 75%, 100%) and variations in the composition of Z100%:F0%, Z75%:F25%, Z50%:F50%, Z25%:F75%, Z0%:F100%. Tests were carried out using a 4-stroke gasoline engine of Tecumseh TD110 located in the Motor Bakar and Propulsion Laboratory of the Mechanical Engineering Department, University of Lampung. Test results show that the biggest improvement in torque occurs in using a filter composition of Z50%:F50%, namely by 28.41%. The followed filter of the composition of Z75%:F25% is as big as 28.31%. The activation temperature of 350oC can improve the torque by 35.08%
Domestic Wastewater Disinfection Planning for Constructed Wetland Treatment Effluent
Full text linkExcessive water consumption to meet water needs has changed aquatic water quality and quantity. Focus on domestic wastewater treatment via built wetlands. Disinfection protects humans against disease-causing viruses, bacteria, and protozoan parasites in wastewater. This study planned the disinfection of artificial wetland wastewater to fulfill microbiological criteria. From the examined data, each unit's design criteria and disinfection effectiveness for the created wetland outlet in the WWTP unit will be discussed. The created wetland must process 8696 cfu/100mL of fecal coliform. Despite good processing efficiency, 94% of fecal coliforms do not fulfill quality criteria. WWTP's wetland emits 8.011 mg/L of Ammonia. 90% chlorine costs Rp. 35,000/kg on the market. Total disinfection costs are rough Rp. 1,018,210.73. Water quality, lamp output power, and exposure distance affect lamp intensity. The lamp's electric power controls the beam's intensity; the more power, the more emission. The emitted power isn't equal to the lamp's electric power. According to the state electricity provider, families with a 900VA power limit will pay Rp. 1,352/kWh in July-September 2021. Nine 30-W bulbs irradiate bacteria. The lights will run for 24 hours non-stop. Hence the monthly electricity usage is 194.4 kWh or Rp 262.829.00
The Initiation Study on the Gold Potential Resources at West Coast Area in Lampung Province, Indonesia
Full text linkGold mineral (Au) is formed due to an increase in the residual solution of magma deposited at high temperature and pressure. This study aims to estimate the potential of gold minerals in the west coast area in Lampung Province. This initiation study was using a geophysical resistivity model. Based on geological data, gold minerals in the West Coast are classified as epithermal hydrothermal deposits in the form of low sulfide quartz veins. The results of the subsurface interpretation were identified as a gold mineralization zone associated with the rock in the form of volcanic rock which has a resistivity value of 400?.m. The source rock volume has been estimated at 130,000 m3 and ?133,000 m3. So that the Au mineral content in the study area is estimated at 0.5-2.09 tons. A future study should be conducted in relation to the development of gold mining industry in Lampung West Coast area, that may integrate more engineering experts
Strength Analysis of Tubular Oil to Oil Cable Box Power Transformer GIS 60 MVA in the Case of Voltage Arc Energy Using the Finite Element Analysis Method
Full text linkThe power transformer is an essential part of the electrical distribution system because it must be reliable and safe from fire and explosions, one of which is brought on by internal oil arching that results in overheating. In general, on the high voltage side of the transformer, there are power transformers fitted with tubular oil to oil cable boxes for the demands of the client. The tubular oil to oil cable box is installed to reduce space in substations with limited space as well as to boost safety against weather and pollution at the high voltage terminal section of power transformers. The goal of this investigation is to determine the cause of an explosion that occurred in a tubular oil-to-oil cable box on the high voltage side of a Gas Insulation System (GIS) type power transformer with a power of 60 MVA and a voltage rating of 150/20 kV. For all parties involved, this incident will serve as a lesson about what to avoid doing in the future with similar power transformers. In this study, we will use a qualitative method with Finite Element Analysis (FEA), which takes samples and data of a Gas Insulation System (GIS) power transformer on the high voltage side, especially in the analysis of tubular strength. This power transformer has a voltage rating of 150/20 kV and a power of 60 MVA. Applying normal pressure to a pressure that could harm the tubular oil to oil cable box can prevent damage. The tubular oil to oil cable box is built of SS400 material and has an 8mm thickness so that it can be determined how robust it is
A Geoelectrical Study of Aquifers in the Natar Region, South Lampung
Full text linkThe conditions for the development of population growth and development in the area around the City of Bandar Lampung are very fast and starting to get crowded, as happened in the District of Natar South Lampung, especially in the Village of Pemanggilan. This condition causes an increase in the need for clean water resources in line with the increase in groundwater exploitation. Therefore it is necessary to map the potential of groundwater through aquifer mapping and aquifer rock layers through geoelectrical measurements. This study aims to determine the potential of groundwater from volcanic aquifer systems based on geoelectrical measurements. The method used in this study is geoelectric resistivity using the Wenner-Schlumberger configuration with 3 measurement points. The results of the study show that using the geoelectrical resistivity method, layers with a resistivity value of ? 30.3 ?m are interpreted as shallow aquifers at depths varying from 1 to more than 24 meters with lithology suspected to be tuff and tuff sandstones, which according to geological data are included in the Lampung Formation. Using the 2D geoelectric method, the distribution of shallow aquifers in the study area to a depth of 24 meters can also be determined. The data obtained is expected to be used as supporting data for the sustainable use of water sources
The Design and Build a Children's Temperature Monitoring System Using The MLX90614 Temperature Sensor and NODEMCU ESP-12E Based On Android
No full textThe degree of children's health reflects the nation's health status, because children as the nation's next generation have abilities that can be developed in continuing the nation's development. The limited parental monitoring of children, so the authors make a child temperature monitoring device that can make it easier for parents to monitor their child's temperature in real time. This study uses a sensor temperature of the infrared MLX90614, NodeMCU ESP-12E as a controller programmed with the Arduino software idea later in the show via the LCD and the application blynk. This system was developed based on the needs of the children's monitoring system. The results of this research are that a child temperature monitoring system has been realized that can monitor the condition of a child's body in real time. Metode used isto compare data between Thermometer Gun with sensor systems ML X90614, then obtained an average difference of 0.0190 C and an average error of 0.053%.
Keywords: Infrared sensor, MLX90614, real time, monitorin
The effect of filler adding palm kernel shell ash on durability and marshall values properties of asphalt concrete mix
Full text linkLampung Province is one of the palm oil producers, especially in Way Kanan Regency. Way Kanan Regency has two palm oil-producing mills, namely PT. Sawit Indo Mas which is located in Kampung Tanjung Raja Sakti Blambangan Umpu and PT PLP which is located in Kampung Bumi Agung, Bahuga District. The two factories duce thousands of tons of Crude Palm Oil (CPO) vegetable oil daily produced from palm fruit plants (Elaeis Guineensis Jacq, Arecaceae). From oil management, it is undeniable that it can create a lot of solid waste from the palm shell. Meanwhile, the government has not made much effort to use the waste from the waste. When managing palm fruit, palm shells cannot be processed into oil because they have a hard texture, so the shells are discarded and become waste. Then we use the shell for research material as a filler. Palm shell ash has a silicon dioxide (SiO2) content which is also contained in Portland cement, so this content can allow the acquisition of a good asphalt mixture on the AC-BC layer. This study aims to see the effect of the effectiveness of adding shell ash fillers from palm shell waste in marshall test tests and value the resulting durability. The addition of fillers with percentages of 20%, 30%, 40%, 50%and 60%. From the results obtained from the test results in the laboratory that the addition of shell ash fillers of 40% gets better performance compared to shell ash with percentages of 20%, 30%, and 60%, with a higher state value of 1225 kg shown. In marshall testing, using palm shell ash fillers can increase the value of KAO. So that from the marshall test, the durability value of the sample immersion at the IRS value of 0% was 98.4% greater than the 40%, which was 91.13%. Overall, using palm shell ash fillers meets the minimum requirements of Bina Marga as an asphalt mixture. The degree of weather change in immersion durability affects the strength level of the marshall test