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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).
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Articles 11 Documents
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Search results for , issue "Vol 27, No 2 (2023)" : 11 Documents clear
Earthquake Resistant Building Structure Design Study Using Steel Plate Shear Wall System (SPSW) Silalahi, Oktavia Ully Artha
Jurnal IPTEK Vol 27, No 2 (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.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.
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)
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
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)
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.
Sunscreen from Coconut Coir Based Lignin Nanoparticles with Extraction Method and pH Shifting as an Anti-UV Material Sari, Diana Novita; Anggerta, Lintang Alivia; Alfiana, Aulia Firda
Jurnal IPTEK Vol 27, No 2 (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.v27i2.5046

Abstract

Indonesia is a tropical country located on the equator with high sun exposure, so sunscreen is needed to reduce the risk of exposure to ultraviolet (UV) light. In this research, a sunscreen was developed that uses natural active ingredients in the form of lignin made from coconut coir. The aim of this research is to determine the comparison between the mass of coconut coir and the volume of ethanol solution that produces the highest lignin content, as well as the concentration comparison between lignin nanoparticles and commercial sunscreen that produces the highest SPF value. The synthesis of lignin from coconut coir was carried out using an extraction method using ethanol solvent, followed by a hydrolysis process with NaOH and acidification with H2SO4, while lignin nanoparticles were made using a pH shifting method using ammonia and HCl. The lignin nanoparticles formed are then added to the sunscreen's active ingredient. The variables used were the ratio of the mass of coconut coir to the volume of 80% ethanol solvent (1:5, 1:10, 1:15, and 1:20 (w-v)) and the concentration of lignin in commercial sunscreen cream (2%, 4%, 6%, 8%, and 10% (w-w)). The results of the research show that the higher the solvent ratio, the more lignin is produced, but will decrease after reaching the optimum point. The optimal solvent volume occurs at a ratio of 1:15 (w-v) with a yield of 12.94% (w-w). In addition, the higher the lignin concentration, the resulting SPF value will also increase. The best concentration is 10% (w-w) at a solvent ratio of 1:15 (w-v) with an SPF value of 22.23.
Paleobathymetric Study using Foraminifera Microfossil Analysis in the Wonocolo Formation, Tinawun Village Area, Malo District, Bojonegoro Regency, East Java Bahar, Hendra; Firdaus, Ar Royyan
Jurnal IPTEK Vol 27, No 2 (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.v27i2.5290

Abstract

Paleobathymetric study on the Wonocolo Formation in the Tinawun Village Area, Malo District, Bojonegoro Regency, East Java, using microfossil foraminifera analysis from rock samples in that area, aims to obtain information about the depositional environment of sedimentary rocks in the past. The Wonocolo Formation is a rock formation deposited during the Middle to Late Miocene, approximately 11 to 15 million years ago. The analysis of microfossil foraminifera involves the identification and counting of different foraminifera species from rock samples. The method used to determine paleobathymetry is the P/B ratio analysis with the maximum flooding surface (MFS) determined by the maximum abundance of planktonic foraminifera. For the P/B ratio analysis, the classification of planktonic and benthic foraminifera is determined based on their shell morphology. Based on the P/B ratio classification, the paleobathymetry of the Wonocolo Formation can be identified in two main bathymetric zones, namely the Neritic Bathymetric Zone (shallow marine environment) and the Oceanic Bathymetric Zone (deep-sea environment). The research indicates that paleobathymetry in the study area occurred during the Late Miocene (N16, N17, and N18) in an Outer Neritic environment with sea depths ranging from 100 to 200 meters.
Application of Neo Vernacular Architecture in The Java Traditional Building Gallery Building in Surabaya Irfani, Muhammad Syihabuddin; Widjajanti, Wiwik Widyo
Jurnal IPTEK Vol 27, No 2 (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.v27i2.3669

Abstract

The application of local values into a modern object is the general definition of Neo Vernacular Architecture. The relationship between building design and clothing has a style that is based on the times, which rotates to utilise the type of design into something new. The obstacle found in the community is the lack of knowledge of the value of so much locality, one of which is in traditional bridal clothing. On the island of Java itself, bridal clothing rental or sales services only provide certain clothing objects with cultural custom themes. Therefore, it is necessary to publish the locality value of traditional bridal fashion that is not yet known to the public as an effort to preserve local culture. The purpose of planning the Javanese Traditional Bridal Fashion Gallery Centre is to advance the fashion entrepreneurship sector of the local and surrounding communities, both on a small and large scale. With this idea, it can become part of the identity of Surabaya City which can attract out-of-town visitors.
INCREASING CASSAVA JERKY PROTEIN THROUGH THE FERMENTATION PROCESS USING SACCHAROMYCES CEREVISIAE AND RHIZOPUS ORYZAE Nurhayati, Anis Anis; Khurniyati, Maylina Ilhami; Nisak, Yunita Khilyatun
Jurnal IPTEK Vol 27, No 2 (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.v27i2.5055

Abstract

Cassava is a plant that is easy to grow in Indonesia. People generally use cassava as a food source of carbohydrates, while the leaves are used as a vegetable by processing it into curry or stir-fry. Cassava leaves have high nutritional value but have yet to be used optimally; most become agricultural waste. This study aims to increase cassava leaf jerkys nutritional value (protein) using microbial fermentation. The experimental design used in this study was a factorial, Completely Randomized Design with two factors: the type of microbe (Saccharomyces cerevisiae, Rhizopus oryzae) and fermentation time (2, 3, 4 and 5 days). The parameters analyzed were protein content, ash content, fat content, carbohydrate content, water content and consumer preference level. From the results of this study, there was an increase in protein levels in cassava leaves for up to 120 hours (5 days), 15.395% using Saccharomyces cerevisiae and 16.165% using Rhizopus oryzae. The ash content significantly differs from treatments with shorter fermentation times of 96 hours, 72 hours or 48 hours. There is no significant difference in the percentage of water content in the various treatments between the treatments. The highest score in the organoleptic test is A2B4 (jerky with the addition of Rhizopus oryzae with a fermentation time of 120 hours).
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Jurnal IPTEK Vol 27, No 2 (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.v27i2.5385

Abstract

Biodiesel Characterization Study from Castor Oil (Jatropha Curcas L) with CaO/K2O Catalyst Santoso, Aman; Sumari, Sumari; Asrori, Muhammad Roy; Januarti, Wenny
Jurnal IPTEK Vol 27, No 2 (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.v27i2.4188

Abstract

Biodiesel is still being developed as a renewable fuel to replace a diesel fuel. Biodiesel production of castor oil has high potential because the oil did not compete with foods. Furthermore, a transesterification process can be optimized by heterogeneous base catalysts. Thus, this study aims to: (1) synthesize CaO/K2O catalysts to be used in the transesterification process, (2) synthesize biodiesel of castor oil and characterize it according to SNI 7182:2015, and (3) study the effect of CaO/K2O variations on biodiesel product. This laboratory experimental research was carried out in the following stages: (1) characterization of castor oil, (2) esterification, (3) preparation of CaO/K2O catalyst, (4) transesterification, and (5) characterization of the synthesized methyl ester. The results showed that the characterization of castor oil included a density of 1.074 g/mL, an acid number of 9.5 mg/g, a free fatty acid (FFA) of 5.09%, and a viscosity of 701 cSt. Stratified esterification and transesterification showed a significant effect on reducing FFA, so the characterization of the transesterified methyl ester from the best catalyst variations (CaO/K2O 1:2) included a density of 1.016 g/mL, an acid number of 1.1 mg/g, FFA content of 0.58%, moisture content of 1.1%, viscosity 43.55 cSt, and refractive index (25) of 1.466.
HEDONIC TEST AND HEDONIC QUALITY TEST OF KOMBUCHA FROM VARIOUS TYPES OF INDONESIAN HERBS Nisak, Yunita Khilyatun; Khurniyati, Maylina Ilhami; Nurbaya, Syarifa Ramadhani; Nugroho, Endik Deni
Jurnal IPTEK Vol 27, No 2 (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.v27i2.5061

Abstract

Since the COVID-19 pandemic, people have learned the importance of consuming vitamins or supplements that boost the immune system. In fact, compounds that enhance the immune system, usually called immunomodulators, can be obtained easily around us, one of which is from TOGA (Family Medicinal Plants). Even though TOGA has been known for a long time, the utilization of TOGA still needs to be improved, even though the bioactive compounds in TOGA can be utilized, one of which is by fermenting it into kombucha. The method used in this study is quantitative and descriptive. The results of this study indicate that based on pH analysis, kombucha had a pH between 3.4 and 3.89 before fermentation. Meanwhile, after fermentation, the kombucha pH dropped to 2.89 – 3.08. The results of the hedonic test showed that curcuma kombucha had the highest average value in terms of aroma, colour, flavour, sensation of soda and overall preference. The results of the hedonic quality test showed that the preferred TOGA kombucha had a slightly pungent aroma, pale yellow colour, quite sour flavour and quite pronounced soda sensation.

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