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INDONESIA
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 399 Documents
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Numerical Investigation of Fluid In 2D and 3D Lid-Driven Cavity at Different Reynolds Numbers Maria Margareta Zau Beu; Jiahn Horng Chen
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.v27i1.3427

Abstract

The lid-driven cavity is an important fluid mechanical system that serves as a benchmark for testing numerical methods and for studying fundamental aspects of incompressible flow in a confined volume. This paper is concerned with the numerical calculation of the LDC on the 2-D and 3-D model. The commercial software ANSYS Fluent was used for the simulation. In these models of the simulated cases, the lid moves in the x-direction. The 2-D solutions for the driven cavity are calculated for 10 ≤ Re ≤ 35,000 with a 501 × 501 and 601 × 601 grid. The driven 3-D cavity is calculated with a 75 × 75 × 75 grid. The steady flow inside the cavity consists of the velocity distributions at different Reynolds numbers. The present numerical results agree well with the literature analytical solutions.
Healing Center With The Orgonite Method in Mojokerto District Karya Arsitra Rismansyah; Wiwik Widyo Widjajanti; Nareswarananindya Nareswarananindya
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.v27i1.4404

Abstract

Jolotundo is a village in the Mojokerto Regency area that is located on the slopes of Mount Penanggungan, close to the forest and Majapahit kingdom relics. In Indonesia, public awareness of the importance of health is declining, causing bad behavior and unhealthy environmental conditions in the community. As technology advances, health technology such as orgonite becomes an effective method of treatment or restoration for both physical and psychological health. Unfortunately, no facilities provide a place to support this method. Therefore, it is necessary to have a facility that provides a place of recovery within the orgonite method based on healing and negative energy elimination for physical, mental, environmental, and spiritual well-being. This research employed field studies and literature studies as well as several methods such as observation, documentary, and interview to obtain data, both primary data as a direct data source and secondary data as other supporting data sources. The design applies the theme of therapeutic architecture, the macro concept of tropical architecture, and the micro concept of adaptive land use. The design environment involves green open spaces and maximizes landscape arrangements.
CLASSIFICATION OF ROASTING RATES IN COFFEE BEANS BY DIGITAL IMAGE PROCESSING USING THE NAIVE BAYES CLASSIFIER (NBC) METHOD M. Mahaputra Hidayat; Eko Prasetyo; Bambang Teguh Wicaksono
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.v27i1.3697

Abstract

Coffee is the bean of the coffee plant and is the source of coffee drinks. Coffee beans must pass through the coffee roasting stage or also called coffee roasting, from this stage of the process the coffee will be roasted and this process also has its own level. At this stage of the roasting process coffee shop business people often do not know this process, then in this case used Local Binary Pattern (LBP) method. LBP is a simple and very efficient texture operator by labeling pixels by doing thresholding on each pixel neighbors and considers the result as a binary number. This method is used to obtain the texture ektrasi of an image. While for the classification method using the Naive Bayes Classifier (NBC) method. Naive Bayes is a simple probabilistic classifier that calculates a set of probabilities by summing the frequencies and combinations of values from a given dataset. The algorithm uses Bayes' theorem and assumes all the independent or non-interdependent attributes given by the values on the class variables. From the test results by comparing training data and testing data obtained an accuracy rate of 81%. For an image-based developed system with display recognition difficulties, this performance is good.
Alternative coarse agregate using locally available materials in Bangkalan Pertiwi, Dewi; Agusdini, Theresia Maria; Farchan, Muchamad
Jurnal IPTEK Vol 28, No 1 (2024): May
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5350

Abstract

Madura Island possesses significant natural resources, particularly aggregates from class C excavations in Bangkalan Regency. These aggregates, including fine aggregate (sand) and coarse aggregate (gravel), are potential materials for concrete mixtures. However, concrete produced solely with Bangkalan aggregates typically achieves a compressive strength of 14 MPa. Combining these aggregates with those from Java Island can enhance compressive strength to 20 MPa. This study aims to determine the optimal composition of Bangkalan and Pandaan coarse aggregates, using admixtures type D (0.3%) and type F (0.6%), to achieve a target compressive strength of 35 MPa. Various combinations of coarse aggregates (100% Bangkalan, 90% Bangkalan and 10% Pandaan, 80% Bangkalan and 20% Pandaan, and 70% Bangkalan and 30% Pandaan) were tested using cylindrical specimens (15 x 30 cm). The results indicate that the combination of 90% Bangkalan and 10% Pandaan aggregates, with the specified admixtures, produced the highest compressive strength of 31.06 MPa at 28 days, which did not meet the target of 35 MPa. This suggests further research is needed to explore additional aggregate combinations and admixture variations to achieve the desired compressive strength.
Earthquake Resistant Building Structure Design Study Using Steel Plate Shear Wall System (SPSW) Silalahi, Oktavia Ully Artha
Jurnal IPTEK Vol 27, No 2 (2023): December
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2023.v27i2.5258

Abstract

Multi-story building structures are vulnerable to lateral forces, especially due to forces caused by earthquakes. Because the higher the building, the greater the lateral deflection that occurs on the upper floors. Indonesia is one of the countries that has high earthquake intensity. One area that has high earthquake intensity is Yogyakarta. The structural building that will be reviewed and analyzed is a 10-story hotel. The development of science and technology has given rise to one solution to improve the performance of tall building structures, namely by installing steel plate shear walls. Steel plate shear walls are a lateral load-resisting system consisting of solid vertical steel plates connecting surrounding beams and columns that are installed along the height of the structure to form a supporting wall. Designing earthquake-resistant buildings with the addition of a steel plate shear wall system provides a suitable structural system to withstand lateral forces during an earthquake. The use of this system can be a recommendation, to be able to utilize steel material as a building structural material by considering the advantages of using the steel material within the limits of applicable regulations, ASCE 7-10 and AISC 341-10. In the analysis of the building structure, the influence of dynamic earthquake loads is reviewed using the SAP 2000 auxiliary program.
Standard Operation Procedure for The Laundry Industry by Considering Thaharah from Uncleanness Muti, Asri Amalia; Yuniawati, Ratna Diah; Mustaqim, Mustaqim
Jurnal IPTEK Vol 28, No 1 (2024): May
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5052

Abstract

In general, the clothing sorting stage is to only separate clothes based on type, color, material and function. Unclean and hadas are not included in the sorting priority. Guaranteeing the quality of products or services is also very clearly stated in article 7 point d of Law no. 8 of 1999 concerning the obligations of business actors to guarantee the quality of goods and/or services produced. In order to prevent fraud by laundry business actors who do not comply with the quality, level, composition, especially the processing process, style or mode as stated on the label or description of goods and/or services, it is necessary to formulate SOPs as a guideline for running a business. The aim of this research is the need for industrial laundry SOPs that consider thaharah, in order to provide confidence and guarantee the quality of service results and raise awareness of consumer protection so that honesty and responsibility can grow. This research has a qualitative approach and validates the SOP document. From the preparation of the SOP, it was recorded that there were 30 activities with a total time of approximately 23,400 seconds or 6.5 hours, the time required was longer than before. Apart from that, there are changes in the sorting process, namely the unclean classification in the first inspection and the color classification in the second classification. The validation result is that the SOP that has been created is in accordance with the thaharah principle. Furthermore, this research can measure work productivity with the aim of increasing efficiency and effectiveness in work processes and time.
Stress Analysis of High-Pressure Steam Header Manifold from Power Boiler to Distribution System Piping Using The Caesar II Software Kurniawan, Wanda; Rahmawaty, Made
Jurnal IPTEK Vol 27, No 2 (2023): December
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2023.v27i2.4652

Abstract

In the construction of the oleochemical plant project, there is a steam pipe that experiences excessive stress during the stress analysis phase using stress analysis software. The pipe is connected to either a boiler or a steam generator equipment. Recalculation is necessary, including for the allowable pipe span and pipe flexibility, to address the excessive stress. The pipe falls into the category of critical pipe, thus requiring stress analysis after the recalculation is performed. The stress analysis is conducted using sustained load, occasional load, and thermal load based on ASME B31.3. The calculation of the allowable pipe span takes the smallest value between the minimum distance based on stress limit and deflection limit, which is 19,006 ft, and the minimum required number of supports, which is 22. The results of the calculation for the allowable pipe span are acceptable as the number of supports meets the minimum required amount. The flexibility calculation yields a value smaller than K1, specifically 0.000916, indicating that the pipe is declared flexible. The highest stress value at node 688 for sustained load is 18,389.3 psi, and the highest value at node 688 for occasional load, it is 18,399 psi. The highest stress value for thermal load, 1420.6 psi, is found at node 168. The stress values for all three load cases do not exceed the allowable stresses. Therefore, the design is declared safe during operation
Proposed Auto Feeder Conveyor Project Scheduling Using the Critical Path Method at PT XYZ Hakim, Luqman; Saputra, Jefri
Jurnal IPTEK Vol 28, No 1 (2024): May
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5409

Abstract

Scheduling is important and must be done in every project implementation. PT XYZ is a company engaged in the production of industrial machine fabrication. One of the jobs PT XYZ obtained was making auto feeder conveyors. In its scheduling plan, PT XYZ estimates that the work will be completed within 37 days. However, in practice, the work was completed within 42 days. There was a delay of 5 days. This delay will cause losses in costs and also cause consumer dissatisfaction. To resolve this delay, the critical path method (CPM) is used. After using the CPM method, the auto feeder conveyor manufacturing project can be completed within 39 days. The critical path of the project lies in work B – E – F – G – H – I – J.
Synthesis of Nano Zinc Oxide Heterogeneous Catalyst Supported with Fly Ash (NZO/FA) for Kapok Seed Oil (Ceiba pentandra) Transesterification Asri, Nyoman Puspa; Siswoyo, Deddy Kurniawan Putra; Somadiharja, Yohannes
Jurnal IPTEK Vol 27, No 2 (2023): December
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2023.v27i2.5273

Abstract

A biodiesel product was developed using the transesterification of kapok seed oil using a nano zinc oxide heterogeneous catalyst with fly ash buffer (NZO/FA) to support the goal of adopting biofuel as a national transportation energy source in 2050. Because it is affordable, environmentally benign, and has a high porosity level, fly ash was selected as a catalyst buffer. Kapok seed oil, on the other hand, is employed as a raw material because of its high oil content—between 25 and 40 percent—and because it offers the best means of resolving the problem of the trade-off between food and fuel in the energy and pagan sectors. In this study, the NZO/FA 50-Sto catalyst's characterisation in the creation of heterogeneous catalysts and the impact of varying transesterification times on biodiesel yield are the main research topics. The NZO/FA-TO-4.5H sample code produced at a calcination temperature of 500°C for 5 hours with a yield percentage of 95.93%, transesterification time of 4.5 hours, oil to methanol molar ratio of 1:15, and transesterification reaction temperature of 80°C was found to have the highest yield in this study. Meanwhile, SNI 7182: 2015's standards are almost entirely met by the biodiesel produced in general terms.
Slope Geometry Design Optimization in the Final Wall Pit Area of Sijebi PT. Solusi Bangun Indonesia Tbk, Narogong Factory, Bogor Regency Afwach, Atina -; Najib, Najib -; Santi, Narulita
Jurnal IPTEK Vol 28, No 1 (2024): May
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5136

Abstract

Slope design is an important component that must be considered in open-pit mining. It affects mine safety as well as the maximization of mining activities. These two things have an inversely proportional relationship and must be optimized with each other. This research aims to provide optimal recommendations related to geometry design that considers the stability of slope mining. The methods utilized in this research are Rock Mass Rating (RMR), Geological Strength Index (GSI), Slope Mass Rating (SMR), kinematics analysis, and limit equilibrium method. Based on the investigation that has been carried out, it is known that the value of the safety factor on the research slope is 4.192 for natural conditions and 3.967 for water-saturated slopes. The slope's safety value factor is known to be a very safe condition. Maximizing the mine design is crucial to achieving optimal extraction of mining materials. The most appropriate slope geometry design for the specified research area requires a single slope angle of 80°, a height of 10 m, and a width of 3 m, resulting in an overall slope of 68°. According to the findings of this recommendation, the safety factor value obtained is 2.076 for natural conditions and 2.050 under water-saturated conditions.

Page 30 of 40 | Total Record : 399

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