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INDONESIA
TEKNIK
Published by Universitas Diponegoro
ISSN : 08521697     EISSN : 24609919     DOI : -
Core Subject : Engineering,
Journal yang mempublikasikan artikel-artikel ilmiah dari berbagai disiplin ilmu rekayasa/keteknikan. Artikel-artikel yang dipublikasikan di Jurnal TEKNIK meliputi hasil-hasil penelitian ilmiah asli (prioritas utama), artikel ulasan ilmiah yang bersifat baru (tidak prioritas), atau komentar atau kritik terhadap tulisan ilmiah yang dipublikasikan oleh Jurnal TEKNIK.
Arjuna Subject : -
Articles 307 Documents
Digital Terrain Model (DTM) Generation From Light Detection and Ranging (LiDAR) Data By Using Simple Morphological Safi'i, Ayu Nur; Hartanto, Prayudha
TEKNIK Vol 40, No 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v40i1.23004

Abstract

The production of Indonesian Topographic Map (RBI) in the scale of 1:5000 takes a long time, especially in the making of contour layer. Contour layer can be extracted from both Aerial Photogrammetry and LiDAR data. Nowadays, LiDAR technology is getting more reliable for DSM. From DSM can be exctracted to get DTM/DEM. DTM/ DEM generation because of its shorter processing  time  and  relatively  low  cost.  The  filtering  method  used  in  this  research  is  Simple Morphological Filtering (SMRF) which input parameters are: cell size, slope, windows, elevation threshold and scaling factor. Average value of Cohen’s kappa is in the range of 0.4-07 which means that the generated DTM is good. Because of the existence of null values in the generated DTM, the smoothing filters have been applied. The extracted DTM then be compared to in situ data. The RMSE ranged from 0,621 to 0,930 m and LE90 about 1,025-1,605. Those RMSE and LE90 values satisfied the vertical accuracy of the 1: 5000 topographic map and graded as the second and third class in accordance to BIG Regulation No.6 of 2018 as revision of Perka BIG No.15 of 2014 focusing on Technical guidelines for Basic Map Accuracy.
Application of Interpretation of Roger’s Ratio, Duval’s Triangle Methods, Breakdown Test, Water Content Test for Feasibility Transformer Oil Diagnostic Syakur, Abdul; Lazuardi, Wildan
TEKNIK Vol 40, No 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (561.006 KB) | DOI: 10.14710/teknik.v39i3.22056

Abstract

Transformers is a vital instrument to distribute electricity from the power plant to the consumer. Therefore, it needs special maintenance to the performance of the transformer in order to avoid the damage. During the operation, the transformer oil will affect some thermal loading and electrical loading. Due to the load accumulation, it can cause dissolved hydrocarbon gases in oil that could potentially lead to a breakdown in the transformer. We need special monitoring against these gases. The other way to analyze the gas dissolved in oil is by using Dissolved Gas Analysis (DGA). The DGA will extract gases to know indications based on the interpretation of the data were performed. This method can also analyze the fault for  a long term prediction, therefore the damage of the transformer can be prevented. The results of DGA analysis on the transformer is the Discharge of thermal fault obtained from data interpretation using Roger’s Ration and Duval’s Triangle method. In other way, the results of voltage breakdown testing indicate oil condition are still good that dielectric strength > 40 kv and for the water content measurement also has a good result at < 25 ppm.
Application of UV Mapping Technique and Painting Texture in Making 3D Animation Movie "Bujang Buta (Blind Youth)" Setiawan, M Iqbal; Trisnadoli, Anggy; Nugroho, Erwin Setyo
TEKNIK Vol 40, No 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1568.035 KB) | DOI: 10.14710/teknik.v39i3.22758

Abstract

The use of UV Mapping and Texture Painting Technique in Indonesia is a country that is rich in folklore. Bujang Buta is one of the folklore originating from the city of Kampar. Many people do not know about the existence of detailed folklore. In this study raised the Bujang Buta folklore which will be attractively packaged in the form of 3D animated films. In the 3D animation film there are many techniques to make it, one of which is the UV Mapping and Texture Painting techniq ues that make 3D animated films more colorful. Making this animated film uses the Blender 3D application as its main medium. Based on the results of testing and analysis, the 3D animated film Bujang Buta Folklore has been verified by LAMR experts (Lembaga Adat Melayu Riau). The UV Mapping and Texture Painting technique has been successfully implemented into the making of the Bujang Buta 3D animated film. And based on the results of a questionnaire that has been given to 37 general public and 6 people who fo llow the organization there are 10 moral messages in the 3D animated film Bujang Buta.
Improvement The Compressive Strength and Flexural Strength of Concrete by Adding Variations of Pineapple Leaf Fibers Yanti, Gusneli; Zainuri, Z.; Megasari, Shanti Wahyuni
TEKNIK Vol 40, No 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (481.544 KB) | DOI: 10.14710/teknik.v40i1.23390

Abstract

Concrete is a building material that is widely used, because this material is strong against the press, can be easily formed to suit the needs. In the other side, has a weakness against bending and has brittle properties, so that a method is needed to correct this weakness. One effort to increase the tensile strength of concrete is done by adding fiber so that it becomes a composite material, namely concrete and fiber. This research aims to improve compressive strength and flexural concrete by adding fiber with variations of 0%, 1%, 3%, 5%, and 7% on the weight of cement on the concrete quality of K-225. The concrete design uses the Department of Environment (DOE) method, with cylinder molds with a size of 150 mm x 300 mm. The number of samples in each variation were 3 specimens and a total sample of 30 specimens. Testing results show that the highest compressive strength and flexural strength in mixed variations with an additional pineapple leaf fiber of 5% with an average compressive strength of 267.00 kg / cm2 and average flexural strength of 41.61 kg / cm2.
The Development of Autonomous Humanoid Soccer Robot Afrisal, Hadha; Munadi, Munadi; Faris, Muhammad; Ardi Sumbodo, Bakhtiar Alldino
TEKNIK Vol 40, No 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v39i3.22916

Abstract

This research aims to develop an autonomous humanoid soccer robot. The humanoid soccer robot is designed using 20 joints which are equipped with dynamixel servo motor AX-12 (upper body) and RX-24 (lower body) and is controlled by using servo controller board CM-700 (ATMega2561). The humanoid soccer robot is 44 cm in height and is equipped with a balancing system of using gyro sensor LPR530 and accelerometer KXM52-1050. In order to detect object and to navigate autonomously, the humanoid soccer robot is equipped with a CMOS camera which is controlled using CMUCAM board (LPC2016). The experiment shows that the humanoid soccer robot has ability to walk with average speed of 14.37 cm/second and is able to achieve a top speed of up to 20 cm/second. The developed humanoid soccer robot can play soccer autonomously: to locate the ball, to detect the goalpost, and to score the goal to the goalpost.
Flood Disaster Mitigation Using a Disaster Early Warning and Monitoring Information System with an IoT-Based Arduino Microcontroller Danang, Danang; Suwardi, Suwardi; Hidayat, Ihsan Ardi
TEKNIK Vol 40, No 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v40i1.23342

Abstract

The current system for mitigating floods is the doorman checking the water level in the water meter installed at the dam. When it rains very hard or other causes that might affect the flood, the doorman conveys information using the manual way by hitting kentongan to alert the surrounding community because the water level has the potential to cause flooding. This article presents the research aimed at flood disaster mitigation by building a monitoring and flood disaster early warning information system using an Internet of Things based Arduino microcontroller. A water level sensor installed at the river water gate is connected to an Arduino Uno device equipped with an SMS Gateway SIM900A. This system monitors the water level and sends information to the Kedungjati SAR Team and Ketua RT of the surrounding community around the river water gate when the water level approaches the upper limit of the flood disaster. IoT technology in this study is used to store river water level data and turn on the siren as flood warning signs when the data received reaches the flood alert level.
Effect of heat treatment on micro structure, hardness, high temperature oxidation resistance of martensitic stainless steel 13Cr3Mo3Ni-cast Anwar, Moch Syaiful; Yulianto, Eric Jonathan; Chandra, Septian Adi; Hakim, Rahma Nisa; Hastuty, Sri; Mabruri, Efendi
TEKNIK Vol 40, No 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (608.002 KB) | DOI: 10.14710/teknik.v40i1.23058

Abstract

This paper reports the effect of heat treatment on microstructure, hardness and high-temperature oxidation resistance of martensitic stainless steels13Cr3Mo3Ni-cast. The aim of this reseach is to increase quality of the steel through heat treatment process on microstructure, hardness and high-temperature oxidation resistance.  The steels samples were prepared by a process sequence ofinduction melting, casting, austenitisazed, single tempered and double tempered. Austenitization process of 1020°C was conducted until 4 hours and quench in water. Then, tempering process of 650°C was carried out until 2 hours and cooled in the air and then double tempering process of 550°C was carried out until 2 hours and air cooled. The double tempered steels were subjected to microstructure, hardness and high-temperature oxidation test of 400 – 700 °C. Then, the experimental results of double tempered steel were compared with control, austenitisazed and single tempered steels. The double tempered treatment revealed a positive effect on the increament properties of martensitic stainless steel 13Cr3Mo3Ni-cast    in the high-temperature environment.
Enhancing The Rate of Process and The Quality of Rice Bran Oil Through The Ultrasonic- Assisted Extraction Djaeni, Mohamad; Listyadevi, Yuniar Luthfia
TEKNIK Vol 40, No 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.703 KB) | DOI: 10.14710/teknik.v39i3.22826

Abstract

Rice bran oil is one of the oils that has been widely used in the chemical, pharmaceutical and food industries considering the high essential content such as antioxidants, vitamins that are good for the body. Extraction of ultrasonic assisted bran oil is one of many method used to reduce extraction time. The purpose of this study was to examine the effect of extraction methods on mass transfer of bran oil, antioxidant quality, and the quality of bran oil during the extraction process at the temperature, extraction time, and the right solvent ratio. Mass transfer of bran oil was evaluated based on the effect of various temperatures, extraction times, and solvent ratios to predict the right tim e to get a lot of bran oil. Chemical quality (antioxidant content of α-tocopherol) and physical quality (oil color) of bran oil were studied so that they were able to predict temperature, extraction time, and relatively good solvent ratio. The results showed that yield increased with increasing temperature and extraction time. However the antioxidant value of α-tocopherol will decrease with increasing temperature, extraction time and solvent. The recommended operating conditions for obtaining yields and antioxidant values at 40ºC, material to solvent ratio 1: 5 and extraction time for 51 minutes.
Back matter TEKNIK, Editor in Chief
TEKNIK Vol 40, No 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (274.768 KB)

Abstract

Artikel editorial ini berisi back-matter jurnal Teknik Volume 39 Nomor 1 Tahun 2018 yang memuat petunjuk penulisan dan pengiriman artikel jurnal Teknik
Peningkatan Kinerja Keputusan Pembelian melalui Penilaian Kesadaran Merek, Asosiasi Merek, Loyalitas Merek dan Persepsi Kualitas menggunakan Metode Regresi Ganda: Studi Kasus Pembelian Truk di PT AIIS Susanto, Novie; Rinawati, Dyah Ika; Ramadhani, Fery
TEKNIK Vol 40, No 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (338.394 KB) | DOI: 10.14710/teknik.v39i3.22189

Abstract

Data penjualan dan pangsa pasar produk truk merek ILT di PT AIIS terus menurun selama periode 2014-2016. Berdasarkan temuan ini, penelitian ini menganalisis bagaimana penjualan dan pangsa pasar truk dapat ditingkatkan. Penelitian ini bertujuan untuk menguji pengaruh kesadaran merek, asosiasi merek, persepsi kualitas, dan loyalitas merek terhadap keputusan pembelian ILT di PT. AIIS. Teknik analisis yang digunakan adalah analisis regresi berganda. Dari hasil penelitian, ditemukan bahwa hanya kesadaran merek dan variabel kualitas yang berpengaruh positif dan signifikan terhadap keputusan pembelian ILT. Kesadaran merek merupakan faktor dominan yang mempengaruhi keputusan pembelian. Nilai Adjusted R Square sebesar 0,521 menunjukkan bahwa 52,1% variasi keputusan pembelian dapat dijelaskan oleh empat variabel independen dalam persamaan regresi sedangkan sisanya sebesar 47,9% dijelaskan oleh variabel lain yang tidak diteliti dalam penelitian ini.

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