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INDONESIA
Jurnal Teknik
Published by Universitas Jenderal Achmad Yani
ISSN : 14128810     EISSN : 25802615     DOI : -
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknik merupakan jurnal peer-reviewed dalam Bahasa Indonesia di bidang keteknikan yang terbit 2 kali dalam setahun. Terbit di bulan Mei dan November.
Arjuna Subject : -
Articles 475 Documents
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Analisis Pengaruh Waktu Torefaksi Terhadap Kualitas Biobriket dari Cangkang Kelapa Sawit (Palm Oil Shell) Oki Alfernando; Lince Muis; Siti Junaida; Malem K. Ginting; Muhammad Haviz
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 21 No 2 (2022): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol21no2.449

Abstract

Palm oil shells are solid waste from the palm oil processing industry. In 1 ton of palm oil produces 6.5% shell waste. Solid waste can be converted into fuel as a substitute for oil, namely bio-briquettes as an alternative fuel through a combustion process with less air. This study aims to determine the effect of time variations on the quality and yield of bio-briquettes produced using a combined pretreatment method of densification (with additional binder) and torrefaction at a temperature of 275 oC and time variations of 30, 45, 60, 75 and 90 minutes. Torrefaction is a new method in the briquetting process where this method takes place at low temperatures. The results showed that the longer the torrefaction time, in general, the value of water content, ash content, volatile matter content, fixed carbon value and burning time also increased. However, this is inversely proportional to the yield value of the resulting product, so the best quality is obtained in 75 minutes with a moisture content of 0.86%, ash content 2.38%, volatile matter content 18.23%, fixed carbon value 78.51 %, product yield is 36.3165% and calorific value is 5964 Kcal/kg.
Antena Mikrostrip Circular Patch untuk Aplikasi Radar Altimeter pada Frekuensi C-Band Menggunakan Metode Parasitik Siti Latifah; Hanny Madiawati
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 21 No 2 (2022): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol21no2.453

Abstract

Currently, human mobility and traffic between regions and between countries are increasing, this requires the world of aviation to grow as well. One of the developments in the world of aviation is radar altimeter technology as an aircraft navigation system that works in the frequency range of 4.2 - 4.4 GHz. In this research, the realization of a microstrip antenna with a circular patch on the C-band frequency has been carried out with the addition of parasitic elements and proximity coupled feeding to strengthen the gain and widen the bandwidth. The antenna is made using Rogers RT5870 material which has a relative permittivity of 2.33, a material thickness of 1.575 mm and a loss tangent of 0.0012. The measurement results show that the bandwidth of 300 MHz is 3.54% narrower than the simulation results, while the gain is 4.79% to 8.13 dBi and the radiation pattern is unidirectional.
Desain Band Pass Filter pada Frekuensi X-Band Menggunakan Metode Square Resonator untuk Aplikasi Radar Navigasi Trisa Mira; Sutrisno; Hanny Madiawati
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 21 No 2 (2022): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol21no2.456

Abstract

A bandpass filter is a component that can pass signals within a certain frequency range, bandpass filter will pass frequencies that are within the cut-off frequency range and reduce frequencies that are outside the cut-off frequency range. A bandpass filter can be used as a component in a navigation radar system in its application. The navigation radar works on X-band frequency, so we need a bandpass filter that can work at the X-band frequency, where in addition to passing the desired frequency and dampening unwanted frequencies, the bandpass filter can also prevent interference that can occur in the modulation process on the radar system. So in this study, a bandpass filter type filter that works at the X-band frequency with a center frequency of 9,1 GHz will be designed, where this filter will be created using the square resonator method, the advantages of this method in addition to its dimensions and simple circuit, the resonator with the shape square will have a suitable bandpass filter response. The final optimization filter that has been carried out produces parameters including the center frequency which is at 9,1 GHz, the bandwidth is 1.5 Ghz, S1.1 is 2,6 dB, and S2.1 is 14.4 dB.
Sistem Monitoring Kualitas Air pada Akuarium Budidaya Ternak Ikan Guppy Menggunakan Mikrokontroler Berbasis IoT Nivika Tiffany; Nandhika Darwin; Dede Furqon Nurjaman; Muhammad Reza Hidayat; Naftalin Winanti
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 21 No 2 (2022): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol21no2.466

Abstract

Ornamental fish cultivation in Indonesia is growing rapidly, data from Ministry of Maritime Affairs and Fisheries (KKP) shows at least 4.720 species of fish, freshwater, and marine, 650 species are ornamental fish. KKP also noted that the production of ornamental fish increased, commodities increased significantly were Guppy (82.5%), Koki (61.7%), Corydoras (38.6%), Betta (16.4%) and Koi (8.9%). In order to produce quality fish, air quality such as pH, TDS, and temperature must be considered. Ornamental fish can survive conditions with pH value of 6.5-8.5, TDS value of 200 ppm and temperature below 28-32°C. The study designed an air quality monitoring system using a microcontroller based on IoT. The sensors used to measure water quality parameters are PH4502C, SEN0244, and DS18B20. The value read by the sensor will be collected and processed in microcontroller, microcontroller used in this system is Arduino Uno. The processed data will be sent to broker via NodeMCU using MQTT protocol. After data arrives at broker, data will be generated by two interfaces, interface is dashboard and augmented reality. The results of this system experiment present that data experiments it can be seen error rate of the pH sensor is 0.80, TDS 1.89, and temperature sensor 1.18.
Analisis Permasalahan Batas Darat Antara Indonesia dan Malaysia dalam Perspektif Aspek Teknis dan Teknologi Geospasial Sukanto Hadi
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 21 No 2 (2022): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol21no2.469

Abstract

The implementation of survey boundary demarcation between Indonesia and Malaysia in Kalimantan has been carried out since 1975, and until now there are still 7 unresolved boundary issues. It’s called Outstanding Boundary Problems (OBP). In practice, issues arise due to differences in the datum and differences in the interpretation of the treaties of 1891, 1915, and 1928 between the Dutch Government and the British Government. This research aims to find an alternative model for the solution to the land boundary problem between Indonesia and Malaysia by conducting a critical, comprehensive study and analysis of the technical aspects of surveying and confirming the Indonesian and Malaysian state boundaries from the perspective of geospatial engineering and technology. This research combines an extensive literature study using maps, high-resolution satellite imagery, SRTM data, and field data from surveys and confirmation of the RI-Malaysia boundary to produce a comprehensive study from the perspective of technical aspects and geospatial technology. The results of the study resulted in an alternative model for solving land boundary problems between Indonesia-Malaysia, namely Indonesia received 3 claims and Malaysia obtained 3 claims from 7 existing problems and both parties divided the two for the Batu Aum area.
Pemanfaatan Informasi Geospasial Dasar (IGD) untuk Analisis Penyimpangan Arah Kiblat Bangunan Masjid secara Masal Yoga Kencana Nugraha; Aisah Hajar
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 21 No 2 (2022): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol21no2.473

Abstract

Basic geospatial information that has been widely disseminated to the general public needs to be utilized optimally for various purposes related to spatial analysis. The city of Bandung is one of the cities with the largest muslim population and the largest mosque building in Indonesia. This study aims to analyze the mass deviation of the direction of mosque buildings, especially those that have been established in Cibeunying Kidul District, Bandung City. The method used is geovisual analysis by comparing the direction of the mosque's qibla which is calculated using the vincenty method to the direction of the mosque building obtained from the 1:1.000 scale RBI map, orthophoto and Mosque Information System (SIMAS). The calculation results show that only the Al Balad Mosque building leads to the city of Mecca. The average magnitude of the deviation from the qibla direction of the mosque building to the Kaaba is 150 1' 0,365 ". There are several factors that are identified visually and the correlation can affect the deviation value of the direction of the mosque building, including the direction of building density of 27.688% and the basic coefficient of mosque building of 14,001%.
Perbandingan Nilai Kedalaman Relatif Sungai Brantas Kabupaten Jombang dengan Perhitungan Algoritma Van Hengel and Spitzer Citra Sentinel-2 dan Digital Elevation Model (DEM) Niswah Selmi Kaffa; Muchammad Masykur; Yoga Kencana Nugraha
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 21 No 2 (2022): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol21no2.475

Abstract

Shallow water relative depth can be gained from the Digital Elevation Model (DEM). As science develops, methods are developed to gain the relative depth one is by processing the Sentinel-2 image using Van Hengel and Spitzer algorithm. The authors aim to compare the relative depth gained from the Sentinel-2 image using the Van Hengel and Spitzer algorithm to the relative depth gained from DEM. The data needed are orthorectified Sentinel-2 level 1C images downloaded from the Earth Explorer page and DEM downloaded from the Tanah Air page. Sentinel-2 image is then corrected atmospherically and radiometrically to get its radian value then processed using the Van Hengel and Spitzer algorithm. The sample points are spread at 25 meters intervals along the Jombang regency Brantas River. This study only compares the computational calculation therefore no field validation is carried out. Sentinel-2 Van Hengel and Spitzer provides an average relative depth of 16.35 m and DEM provides an average relative depth of 17.98 m with the determination coefficient (correlation value) of the two data is 6.52%. The low correlation is due to the high sediment content in the water column of Brantas River, causing the bias in the image.
Kajian Penggunaan Profil Pultruded Fiber Reinforced Polymer untuk Jembatan Pejalan Kaki Muhammad Iqbal
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 21 No 2 (2022): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol21no2.487

Abstract

The interest in composite materials has increased significantly due to their high strength to weight ratio. Utilization of FRP as construction material is not yet popular in Indonesia as it’s generally used for strengthening structural elements. This study aims to provide a design overview of a hypothetical hollow square profile 150.130.10 on a single span bridge with 12, 16, 20 and 24 meters span length variations. The method refers to the AASHTO design criteria in the form of deflection, vibration, and component allowable stress. The results show that all design criteria on a 12 meters span are fulfilled. Due to insufficient bridge stiffness in 20 and 24 meters span, the vertical fundamental frequency is 4.33 Hz and 3.3 Hz respectively, thus the requirements (> 5Hz) are not fulfilled. In addition, the  FRP profile weak axis critical compressive capacity (68.95 kN) cannot withstand the critical load at spans of 16, 20 and 24 meters (respectively: 97.91 kN; 144.39 kN; 185.36 kN). This study shows that dynamic responses and material characteristics are two factors that may determine pedestrian FRP bridges design.
Analisis Variabel Perubahan Suhu Terhadap Karakteristik Tegangan Tembus Dielektrik Udara Christiono; Miftahul Fikri; Iwa Garniwa MK; Kartika Tresya Mauriraya
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 22 No 1 (2023): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol22no1.459

Abstract

The problem in the tropics is the effect of temperature changes on the high voltage system, resulting in isolation around the electricity distribution in the 20 kV cubicle, which can trigger the insulation failure (breakdown voltages) on a feeder. To reduce the occurrence of power outages due to insulation failure with changing temperatures, direct testing is carried out by providing temperature variations ranging from 30oC to 90oC. To correctly understand the phenomenon, testing should be carried out. The test is carried out every 5 oC temperature increase. Based on the research results, a graph is obtained that explains the decrease in the breakdown value at 50oC, which causes the insulation breakdown voltage to be 27kV, and the decrease in the breakdown voltage at 90oC, which causes the insulation breakdown voltage to decrease to 22kV. Based on experiments, it can be concluded that the greater the temperature rise, The breakdown voltage appears more quickly. Thereafter, the data from the research results were tested using the linear regression analysis method, so that a MAPE obtained 3.89% and an RMSE obtained 1.33 were obtained with an average percentage obtained 0.37%.
Analisis Kegagalan pada Komponen Work Roll Setelah Perlakuan Panas Rifqi Al Hakim Al Hakim; Herry Oktadinata
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 22 No 1 (2023): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol22no1.463

Abstract

There has been a failure on the work roll components of the nodular cast iron type after the heat treatment, and the failure is in the form of cracks on the surface. In the heat treatment process, it can cover the whole or part of the component, and the consequence is that some elements will crack due to internal stress. This failure analysis research aims to find out the causes failure of work roll component. In this study, were carried out a visual inspection, non-destructive testing of dye penetrant and ultrasonic test, chemical composition test, fractography test microstructure test, and Rockwell C hardness test for the failed work roll components. The results showed that the component had high hardness and become brittle fracture. The content of 0,275% chromium can influence the high hardness of a carbide former. This amount exceeds 0,10% of the chromium composition of nodular cast iron, which makes carbides difficult to remove through heat treatment. Cracks in work roll components can also be affected by stress concentrations due to sudden changes in cross-sectional area during heat treatment triggered by porosity, inclusions, and acute angles.

Page 42 of 48 | Total Record : 475

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