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Jurnal IPTEK
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : 14117010     EISSN : 2477507X     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal IPTEK - Media Komunikasi Teknologi Diterbitkan secara berkala setahun 2 (dua) kali pada bulan Mei dan Desember oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM), Institut Teknologi Adhi Tama Surabaya (ITATS). Jurnal ini memuat hal-hal yang berkaitan dengan bidang Teknik Sipil, Teknik Mesin, Teknik Elektro, Teknik Arsitektur, Teknik Perkapalan, Teknik Informatika, Teknik Industri, Teknik Kimia, Teknik Lingkungan, Teknik Pertambangan, Teknik Geologi, Desain Produk, Sistem Informasi, dan Sistem Komputer baik yang ditulis dalam bahasa Indonesia maupun bahasa Inggris (diutamakan).
Arjuna Subject : -
Articles 378 Documents
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Swing and Electrode Diameter Effects on Toughness and Hardness of Stainless Steel 304 MIG Welding Results Alifian, Fahrizal; Setiawan, Eko Agung; Rosidah, Afira Ainur
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.5375

Abstract

Welding is one of the commonly used methods for joining metals. One of the welding techniques frequently employed is MIG welding (Metal Inert Gas welding). This type of welding is typically used for joining stainless steel. Consequently, many factors need to be analyzed to achieve optimal welding results. The objective of this research is to investigate the influence of swing variation and electrode diameter on hardness, toughness, and macrostructure from the welded stainless steel 304 using MIG welding. The research results showed the highest toughness test results with a 2.0 mm electrode diameter and a zig-zag swing of 0.459 J/mm2, while the lowest toughness test results were obtained with a 2.6 mm electrode diameter and a spiral swing of 0.201 J/mm2. The highest hardness test results were observed with a 2.6 mm electrode diameter and a zig-zag swing in the Heat Affected Zone (HAZ) at 292.0 kg/mm2, whereas the lowest hardness test results were obtained with a 2.0 mm electrode diameter and a zig-zag swing in the welded metal at 203.6 kg/mm2. The widest HAZ occurred with the spiral swing variation and a 1.5 mm electrode diameter, resulting in a HAZ width of 1.92 mm, while the narrowest HAZ of 1.25 mm occurred with the spiral swing variation and a 2.0 mm electrode. Thus, it can be concluded that the electrode diameter variation affects the results of toughness, hardness, and macrostructure tests.
Implementation of Total Quality Management (TQM) and Malcolm Baldrige National Quality Award (MBNQA) for Work Quality Improvement Syaiin, Moh Nur; Lukmandono, Lukmandono
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.6478

Abstract

Performance measurement is needed to improve organizational performance by systematically measuring the level of performance achievement. This is done so that the company can know its position so that improvements can be made which will have an impact on increasing the productivity of the company. PT Esa Solusi Mandiri with the brand name Esaco is a consulting, training, assessment and equipment inspection agency. Esaco needs to improve its performance because the success of a company can be assessed by accurate and precise performance indicators to reflect its competitiveness. The approach used for performance measurement uses the Malcolm Baldrige National Quality Award (MBNQA). This study shows that Esaco's performance is in the average category with a score of 416.17, which indicates that the company is in the early improvement stage in the service sector.
(Cover, Editorial Board, Table of Contents) Jurnal IPTEK, Tim
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Cost Benefit Analysis of Energy Retrofitting with the Addition of Ventilation Holes in Middle Low-Income Houshold Buildings Elvarettano, Rhesa Akbar; Hamidah, Nur Laila; Aulady, Mohamad Ferdaus Noor
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.5852

Abstract

The current climate change is characterized by an increase in the earth's surface temperature; one of the impacts that is felt quite significantly is the thermal comfort conditions in buildings. This will encourage residents to use air conditioning to provide the required level of thermal comfort. From the results of electricity demand forecasts, from 2017 to 2036, electricity demand will increase by 6.4% annually, dominated by the household sector at 38.49%. Efforts can be made to condition the room's thermal comfort to reduce the AC's operating time. This can be realized through building energy retrofitting, especially in middle-low-income households. Retrofitting will also not require high costs, so it suits middle-low-income households. In this research, retrofitting was carried out by implementing ventilation. It is hoped that ventilation will naturally provide air to specific rooms through air movement and exchange. This study implemented 12 variations in ventilation, namely variations with cross ventilation and non-cross ventilation, then varied the size of the ventilation and the number of ventilations. This research was carried out based on simulations using Computational Fluid Dynamics. After carrying out the simulation, it was obtained that the most significant decrease in indoor temperature was when cross ventilation was applied at night with ventilation measuring 30 cm x 70 cm with a total of 4 vents, namely with a decrease in the average indoor temperature of 1.614C. After that, a cost-benefit analysis was carried out to compare the costs and benefits of a project; a cost-benefit ratio of 1.26 was obtained, where the profits were more significant than the expenditure costs, a payback period value of 0.402 was obtained, or the capital could be returned for five months, and savings were obtained. Electricity consumption costs up to year five amount to IDR 24,340,306.
Manufacturing and Testing of Plastic Waste Recycling Machines Using a Screw Barrel System with Shredding and Extrusion Mechanisms. Yasin, Azalia Fajri
Jurnal IPTEK Vol 28, No 2 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i2.6704

Abstract

Mesin daur ulang dengan sistem shredder dan screw barrel memiliki peranan penting dalam mengatasi permasalahan sampah plastik dan memberikan dampak positif bagi lingkungan dan industri. Tujuan penggunaan mesin ini adalah untuk mengurangi pencemaran lingkungan akibat sampah plastik yang sulit terurai. Metode penelitian yang digunakan dalam penelitian ini dimulai dari studi literatur, perancangan dan perhitungan, proses pembuatan alat diakhiri dengan pengujian alat. Perancangan gambar teknik dilakukan dengan software shapr3D. Sistem ini menghasilkan serpihan padat pada plastik PET dengan daya standar 110V, operasi berfungsi baik pada suhu ruangan, independen dari proses lainnya. Extruder ini ditenagai oleh motor dinamo gearbox 220 V AC, 25 watt dengan torsi tinggi yang dilengkapi dengan box kontroler, kecepatan yang digunakan pada extruder ini berkisar antara 45 rpm - 55 rpm, tergantung pada kenaikan suhu elemen pemanas. Serpihan/serpihan yang lebih besar berukuran sekitar 5 mm, sebagian besar serpihan berukuran cukup kecil dan dapat diproses oleh extruder. Sistem ini mampu menghasilkan serpihan padat pada plastik PET dengan daya standar 110V, operasi ini berfungsi dengan baik pada suhu ruangan dan tanpa proses lain. Hasil diperoleh dari 4 kali uji coba acak tanpa perencanaan sama sekali.
Implementation of Convolutional Neural Network in Detecting Avocado Ripeness Level Luge, Miclyael; Indra, Zulfahmi; Syahputra, Hermawan; Al Idrus, Said Iskandar; S, Kana Saputra
Jurnal IPTEK Vol 29, No 1 (2025)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2025.v29i1.6737

Abstract

Squeezing avocados to determine ripeness can cause physical damage or bruising, reducing the fruit’s quality and resulting in losses for sellers and buyers. This research aims to develop an Android-based mobile application to detect avocado ripeness based on skin color, avoiding physical damage to the fruit. The study uses three simple Convolutional Neural Network architectures to evaluate the algorithm’s ability to detect avocado ripeness. The dataset includes 385 images across four classes: immature, half-ripe, ripe, and overripe (74 images each), and an additional 89 images for the non-avocado class. The model was trained with learning rates of 0.001, 0.0001, and 0.00001. The architecture with the most convolutional layers achieved the best performance with a 0.001 learning rate, yielding a test accuracy of 94.15%, a test loss of 19.28%, and an F1-score of 94.0%. The best model was then converted to TFLite format and successfully integrated into an Android application that functions effectively.
The effect of pretreatment process on lignocellulosic materials with a combination of microwaves and alkaline solvents on solid products. Fitri, Medya Ayunda; Rahkadima, Yulia Tri
Jurnal IPTEK Vol 25, No 2 (2021)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2021.v25i2.2355

Abstract

The pretreatment process is important in treating lignocellulosic-rich biomass such as sugarcane bagasse. The lignocellulosic structure is strong, and the proportion of crystals is high, complicating the fermentation process. Still, it needs to be converted to a more amorphous structure for easy access to fermenting enzymes. The pretreatment process is carried out with alkaline solvents and microwaves in this study. The process begins by standardizing the size of the bagasse powder used. Sugarcane bagasse powder and NaOH alkaline solvent were mixed in a three-necked round-bottom flask. The reactor used in this study was a modified domestic microwave equipped with a temperature controller and condenser. The results showed that this modification was significant to reduce the weight of the residual solid product compared to the initial weight of the raw material. Process variables such as reaction time and solvent concentration significantly affect the cellulose content of solid products. However, hemicellulose content showed different results. The results of the XRD analysis showed that the crystallization index of the effect decreased with increasing pretreatment time. Pretreatment with microwaves and alkaline solvents was successful with satisfactory structural changes in the cellulosic solid.
ANALYSIS OF LOCATION AND DECISION-MAKING OF FLEET VEHICLE TYPE WITH CVRP MULTI TRIP AND GRAVITY LOCATION MODEL FOR OPERATIONAL COST EFFICIENCY (Case Study CV. XYZ, Wonoayu-Sidoarjo) Ahmad, Nofan Hadi; Sari, Tri Novita; Purba, Ari Pranata Primisa
Jurnal IPTEK Vol 27, No 1 (2023)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2023.v27i1.2344

Abstract

Transportation has an important role in the logistics of a company, both in services and products. Increased orders in 2020 for wooden speaker products at CV. XYZ (Wonoayu-Sidoarjo) makes this company try to minimize transportation costs at their operational level. This study focuses on determining the relationship between changes in the type of fleet vehicle and the depot location on the operational costs of product delivery and the time to return to the depot in terms of adding trips. The methodology used in this study is the CVRP Multi Trip with Heterogeneous fleet vehicle and the Gravity Location Model based on the heuristic method. Saving heuristic method and nearest neighbor are heuristic methods used in computational studies to determine the order of visits to the formed sub-routes. There are 4 scenarios that are modeled to further analyze the results of these computations, namely: (1) CVRP multi-trip of old location with wings box truck, (2) CVRP multi-trip of old location with Fuso truck, (3) CVRP multi-trip of the new location with wings box truck, and (4) CVRP multi-trip of the new location with fuso truck. The results of the study concluded that there is a relationship between: (1) changes in fleet vehicle type with total traveling distance, (2) changes in depot location with total traveling distance, (3) fuel consumption rate on vehicle operating costs, (4) average vehicle speed on the time back to the depot. Scenario 4 is the best scenario in terms of traveling distance, fuel costs and delivery time. However, moving the depot center is not easy, so the scenario 2 is the most applicable condition considering that the fuso truck is available and has a higher utility than the wings box truck
Economical Analysis of 3GT Traditional Fishing Vessels in The Waters of Bengkalis Island Santoso, Budhi; Jamal, Jamal
Jurnal IPTEK Vol 25, No 2 (2021)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2021.v25i2.257

Abstract

Bengkalis Island is the island of the capital city of Bengkalis regency, Riau province. Bengkalis Island is surrounded by the ocean so that the people who are on the edge of the coast mostly work as fishermen. Fishing boats in Bengkalis Island reach more than 2000 units. The limitations of fishing make it fishermen more difficult to get more income. There are a lot of efforts made by fishermen to improve these results including increasing engine power/speed of the ship and also changing fishing gear. To change this means increasing the operational costs of ships. For this reason, economic analysis needs to be calculated. In this study fishing boats are divided into 6 models, 3 models are distinguished based on the driving machine, namely 12 PK, 16 PK, and 24 PK while the other 3 models are distinguished based on the fishing gear, namely tansi net, kurau net, and longline. Analysis using the Net Present Value (NPV) method is knowing the model of the ship that returns the fastest capital and has the biggest advantage. The largest Net Present Value (NPV) is in Model 3 or 4 with NPV of Rp 307,091,520 and Internal Rate of Return (IRR) of 608.4%, namely yapal vessels that have 24 PK engine power and use tansi fishing gear
Paving Block from LDPE Plastic and Pyrolysis Residue Marlinda, Lenny
Jurnal IPTEK Vol 26, No 2 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i2.2563

Abstract

The purpose of this study was to utilize residues of the plastic waste pyrolysis process and LDPE plastic as a substitute of cement in the manufacture of paving blocks. The residual pyrolysis process used was a pyrolysis residue of a mixture of polypropylene (PP) and low density polyethylene (LDPE) plastic waste with mass ratio of 100% PP, 75: 25%, 50: 50%, 40: 60%, 25: 75, and 100% LDPE. The mass ratio of LDPE plastic and pyrolysis residue were 70:30%, 60:40%, and 50:50%. The comparison of sand and residual pyrolysis of plastic waste used was 1: 1. The block paving obtained was characterized using SEM and quality tests were carried out with parameters of compressive strength and water absorption. The results of SEM analysis indicate the existence of a bond between sand and plastic pyrolysis residues. The variations in the type of plastic ratio in pyrolysis process indicate the varying of compressive strength and water absorption of the paving blocks

Page 33 of 38 | Total Record : 378

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