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Journal of Engineering and Scientific Research (JESR)

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Published by Universitas Lampung

ISSN : 26850338 EISSN : 26851695 DOI : https://doi.org/10.23960/jesr.v4i1.78

Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Engineering Industrial & Manufacturing Engineering

The focus and scopes of JESR is on but not limited to Mechanical Engineering and Material Sciences, Chemical and Environmental, Industrial and Manufacturing Engineering, Computer and Information Technology, Electrical and Telecommunication, Civil and Geodetic Engineering, Architecture and Urban Planning, Geophysical Science and Engineering, and other multidisciplinary research. The main criteria for publication are including the originality, scientific quality and interest to the aim and focus. JESR publishes twice a year for June and December editions. We welcome for publication collaborations with organizer of International Seminars, Conferences and Symposiums around the world. We are encouraging authors to submit their manuscript through our online system.

Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)

Articles 130 Documents

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Tsunami Modelling Araound Lombok, Indonesia Indriati Retno Palupi, Wiji Raharjo
Journal of Engineering and Scientific Research Vol. 2 No. 2 (2020)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Lombok earthquake in 2018, raised many failure of facilities that impact to human life. The earthquake was unique, started with mainshock that did not predict by scientist with hypocenter located in Flores Fault in the north of Lombok Island. In 1992, tsunami recorded in Lombok with the hypocenter also in Flores Fault. Based on the information, earthquake in Flores Fault can trigger tsunami. Beside Flores Fault, subduction zone in the south of Lombok is also can be earthquake source and it is not impossible can trigger the tsunami. The purpose of this research is to modeled the tsunami both it come from earthquake in Flores Fault and the subduction zone with magnitude 7.8. Numerical method is used to modelled it and the result is the height and velocity of tsunami is 11 m and 720 km/hours for Flores Fault and 9 m and 450 km/hour for subduction Zone.

Monitoring for Photovoltaic in Outer Island W Sunanda, E A Pratama, H Subastiyan, Y Tiandho, D Novitasari
Journal of Engineering and Scientific Research Vol. 2 No. 2 (2020)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Photovoltaic is a renewable energy source that can optimally be used on outer islands and areas that are difficult to reach by the main electrical system network. With good solar energy intensity on a daily, it adds to the advantages of using photovoltaics. In this regard, it is necessary to make a prototype for monitoring the photovoltaic output parameters to measure photovoltaic performance. The parameters that will be monitored on 50 Wp photovoltaic used in this research are voltage using a voltage sensor, current using an ACS712 sensor, and the real power generated. The monitoring results are stored in a database and monitored in realtime based on the website's setting. So that this prototype can be used in several outer islands in Bangka Belitung, which is geographically an archipelago

GIS-Based Area Suitability Analysis for Development Planning Purposes Campus: Case Study Banyuwangi State Polytechnic Endi Sailul Haq, Farisqi Panduardi
Journal of Engineering and Scientific Research Vol. 2 No. 2 (2020)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

In the context of the ecological relationship between humans and the academic environment, success in obtaining high-quality graduations influenced by the quality of the building's space system and other supporting facilities as a place for students to study. So the construction site's design becomes an essential factor to consider in the educational environment. Banyuwangi state polytechnic has not implemented and developed SIG to determine the construction site. Hence, it causes campus spatial planning problems for the future, like puddles, floods, noisy classrooms, and difficult access to each building. Banyuwangi State Polytechnic, as a twelve-year-old college in Banyuwangi, is in desperate need of regional development planning as one of the efforts to ensure the continuity of academic activities that are adequate and comfortable for students. This study aims to ?nd out the area suitability for determining Banyuwangi State Polytechnic development's best location choice. Banyuwangi State Polytechnic, located in the middle of the public road on the east side and the railway in the west to the north, causes noise levels to be a critical issue to consider to achieve a fair learning process. Area suitability assessment is a critical determinant in campus planning development. The suitability assessment is carried out through the AHP (analytical hierarchy process) model covering all land, buildings, noise levels, soil slope, road access, and availability of irrigation channels. The data obtained mapped into the Geographic Information System using Quantum GIS (QGIS) software. Land-use suitability is calculated based on criteria in the form of noise level (NL), land elevation (EL), ease of access (RA), and irrigation channel (ICA). There are 4 points obtained after discussions with the development planning unit management for alternative locations for development sites. The highest weight of the best criteria for determining location is the NL criteria of 0.566 and PSI of 0.283. The best location for development is in the second alternative location with a weight of 0,20176, followed by the third alternative location with a weight of 0,12028.

Identification of Geothermal Potential with Remote Sensing, Geochemistry, and Magnetotelluric Method in West Sumatera S S Larasati, I Maratama, P W Laksmana, O D Puspita, I Takodama
Journal of Engineering and Scientific Research Vol. 2 No. 2 (2020)
Publisher : Faculty of Engineering, University of Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung – Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v2i2.61

West Sumatra is one of a geothermal potential in Indonesia because of interaction between Eurasian and Indo-Australian tectonic. The existence of volcanoes produces geothermal potential with lithology andesite, tuff, and lapilli lava in the Marapi Mountain complex, which elongated at NW-SE direction as a result of NE-SW subduction. The remote sensing method specifically with Composite Band 567 and Lineament Density Analysis (LDA) found anomaly with the permeability value of prospects ranged from 2.05 to 4.76% per km2 (highest density value) with general direction is in the southeast-northwest which in line with the Sumatra structural pattern. Based on geological data, argillic alteration was found with geothermal manifestations consisting of hot springs. Through geochemical analysis, the fluid type of hot water sample (temperature of 48.66oC) is in the immature water zone; occur with the presence of carbonate sinter. Geophysical analysis using the magnetotelluric (MT) method to identified geothermal systems such as cap rock with low resistivity (<30 ohm.m) and reservoirs with moderate resistivity (31-300 ohm.m). The correlation between remote sensing, geochemistry, and magnetotelluric could determine the geothermal potential in West Sumatra.

Distributed Control with Web-based 3D Visualization using Kinematics Analysis for IoRT Z Iklima, T M Kadarina
Journal of Engineering and Scientific Research Vol. 2 No. 2 (2020)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

The use of graphical user interface in web platform has been increasing in the recent decades. The concept of Internet of Robotic Things (IoRT) integrates heterogenous intelligent devices into a distributed architecture of platforms. This research is conducted to deliver proof of concept of distributed control of 2 DOF robot manipulator with web-based 3D visualization. The 3D modeling was developed using Three.js and the WebGL library. Synchronization was made using WebSocket communication on TCP network layer. This protocol allowed 3D mesh data broadcasted from web interface to manipulator with average response 7.86 ms. Moreover, using Denavit-Hartenberg convention, kinematic model facilitates the convention of end-effector position data into angular form and vice versa. The error percentage at a joint 1 is 4% and joint 2 of 2.96%. The error occurs because of the characteristic of inverse function called singularity in which the application value in each joint has the input values of and respectively to get the end-effector position on the 2 DoF Manipulator Robot.

Electric Field Waveforms of Very Close Negative Cloud to Ground Flashes Shamsul Ammar Shamsul Baharin, Mohd Riduan Ahmad
Journal of Engineering and Scientific Research Vol. 2 No. 2 (2020)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Negative cloud-to-ground brings down negative charge from cloud to ground. In this paper, observations of the characteristics of fast and slow electric field within reversal distance (less than 7-8 km from lightning sensor) are reported. A total of four negative cloud to ground lashes detected very close to our measurement site in Universiti Teknikal Malaysia Melaka on 12th November 2019 were selected for analysis. The captured waveforms are compared with the location data provided by Tenaga Nasional Berhad Research (TNBR) for validation purposes. It can be observed that electric field changes of stepped leader and return stroke are always positive whether beyond or within reversal distance. Meanwhile, for cloud activities, the electric field change is always negative within reversal distance.

Dashboard Monitoring Atmospheric Corrosion Sensor in Material Metal Using Laravel Framework Nima Rohmalia; Gigih Forda Nama; Nining Purwasih
Journal of Engineering and Scientific Research Vol. 3 No. 1 (2021)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Corrosion is a chemical reaction that occurs in materials made of iron such as steel. Steel that is experiencing corrosion will appear dark brown spots, the longer it is getting more and more and can cover the entire surface. Corroded steel will result in a major deterioration and structural failure because the thickness of the steel will decrease over a period of time, so the safety of the building is clearly not guaranteed. Research on the tools used to detect the corrosion value of steel has been carried out. However, not using the internet of things technology. Therefore, a web-based corrosion monitoring or monitoring system was designed. The web will display data on voltage and temperature values ??in the form of numbers and charts. In addition, the website can also send SMS and Whatsapp message notifications if the value obtained exceeds the threshold. In developing this website using the prototype method, Laravel Framework, PHP and Java programming languages, MySQL database, Guzzle, and Whatspie as automatic message sending bots. System can provide information of monitoring regarding dummy, active and delta voltage along with their time and temperature.

Frequency Stability Control In Low -Inertia Power System Using Virtual Synchronous Generator Novia Utami Putri; Khairudin khairudin; Nining Purwasih
Journal of Engineering and Scientific Research Vol. 3 No. 1 (2021)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

The stability of the electric power system is divided into transient stability, steady state stability and dynamic stability. Things that affect the performance of the generator include the addition of generators, changes in the load that vary in the system which have an impact on system stability and the distance between the generator and the load. The addition of a Virtual Synchronous Generator (VSG) is needed to improve the power system that is integrated with Renewable Energy Systems Source in maintaining system stability. When the integration between conventional generators and Renewable Energy Systems Source without Virtual Synchronous Generator (VSG) has a frequency response of 58.2 Hz when the generating capacity is -40% of the initial state, while integration between conventional generators and Renewable Energy Systems Source with Virtual Synchronous Generator (VSG) has a steady state response of 60 Hz even though the generating condition is 40% of the initial capacity of the generator. This means that the Virtual Synchronous Generator (VSG) can stabilize the return frequency in its nominal value on the system. Keywords : Inertia, Conventional Generating, Renewable Energy Systems Source, Virtual Synchronous Generator (VSG).

The Effect of Basalt Material Composition and Rice Husk Ash on The Characterization of Paving Block M Amin; Sudibyo Sudibyo; M Jannah; P Karo Karo
Journal of Engineering and Scientific Research Vol. 3 No. 1 (2021)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Paving block (concrete brick) is a composition of building materials made from a mixture of Portland cement or other hydraulic adhesive. The making of paving blocks is done by a process of molding, soaking, physical testing including compressive strength, density, porosity, and absorption, and characterization including XRF and XRD. The paving blocks are made without the addition of basalt stone and rice husk ash and with the addition of 5%, 10%, 15%, 20% and 25% with a test life of 7 days, 14 days and 28 days. The materials used are cement, sand, basalt stone, rice husk ash and water. Paving blocks without the addition of basalt stone and rice husk ash have the highest compressive strength at the test age of 28 days of 9.9 MPa and absorption of 15.06%, whereas with the addition of basalt stone and rice husk ash the highest compressive strength is at a concentration of 5% at age 28day test of 12.25 MPa and the absorption value of 7.12%. The results of XRF characterization showed that the more concentrations of basalt stone and rice husk ash, the CaO contained in the paving blocks increased while the SiO2 decreased. The results of XRD characterization showed that the phases formed were ternesite, microline maximum and yeelimite.

Effect of Added Pectin and Microcrystalline Cellulose (MCC) on Capsule Shell Quality Nuke Agustin; Lia Lismeri; Edwin Azwar
Journal of Engineering and Scientific Research Vol. 3 No. 2 (2021)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

The objective of this study was analyzing the effect of the added pectin and microcrystalline cellulose (mcc) on the capsule shell quality. The method used in this study was by combining the pectin and microcrystalline cellulose composition on capsule shell manufacture. The formulation used to test the capsule shells was through 1 gram, 2 gram, 3 gram of pectin; 0 gram and 1.5 gram of microcrystalline cellulose; 1 gram of glycerol; and, 1 gram of carrageenan. The experiment tests used in this study were through the organoleptic test, the capsule weight test, the moisture test, the pH test, the dissolution time test, and the capsule-length test. The result of this study showed that the recommended formulation used to manufacture the hard capsule shells was through 3 gram pectin and 1.5 gram microcrystalline cellulose. The required temperature to heat the pectin and microcrystalline cellulose was at 90oC with 2.5-hour heating time. The characteristics of the manufactured capsule shells were that it had a turbid colour and irregular shape, the surface was not smooth and the disintegration time was 9 minutes and 21 seconds. Keywords: Capsule Shell, Microcrystalline Cellulose, Pectin, Variation, Testing

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Irza Sukmana

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+62721234234

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jesr@eng.unila.ac.id

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Faculty of Engineering, Universitas Lampung. Jl. Soemantri Brojonegoro No.1 Bandar Lampung – Indonesia. http://eng.unila.ac.id

Location
Kota bandar lampung,

Lampung

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Irza Sukmana

Contact Email irza.sukmana@eng.unila.ac.id

Phone +62721234234

Journal Mail Official jesr@eng.unila.ac.id

Editorial Address Faculty of Engineering, Universitas Lampung. Jl. Soemantri Brojonegoro No.1 Bandar Lampung – Indonesia. http://eng.unila.ac.id

Location Kota bandar lampung, Lampung INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Irza Sukmana

Contact Email
irza.sukmana@eng.unila.ac.id

Phone
+62721234234

Journal Mail Official
jesr@eng.unila.ac.id

Editorial Address
Faculty of Engineering, Universitas Lampung. Jl. Soemantri Brojonegoro No.1 Bandar Lampung – Indonesia. http://eng.unila.ac.id

Location
Kota bandar lampung,

Lampung

INDONESIA