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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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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.
(Cover, Editorial Board, Table of Contents) IPTEK, Tim Jurnal
Jurnal IPTEK Vol 28, No 1 (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.v28i1.6027

Abstract

Rice Bran Oil Extraction: A valuable First Step Towards Edible Oil Naulina, Rosada Yulianti; Novitasari, Diana; Irmawati, Devi; Zullaikah, Siti
Jurnal IPTEK Vol 28, No 1 (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.v28i1.5047

Abstract

Rice bran has the potential to become a nutritional component that reduces disease risk and improves physical health. In addition, rice bran is a hypoallergenic (allergen-free) component which is a good source of dietary fiber. Rice bran oil extraction (RBO) is one of the most popular uses of rice bran. Judging from the health benefits and healthier composition, rice bran oil is very appropriate. The most unsaturated fatty acids are found in rice bran oil which has a composition of 80% unsaturated fatty acids. In taking yields, the extraction method is a practical and effective technique. This research aims to understand the effect of temperature, mesh size, and extraction time on the yield value and FFA RBO content. This Soxhlet uses several variables, with temperature variables of 60°C, 65°C, 70°C, 75°C, 80°C while time variables of 1, 2, 3, 4, and 5 hours with variations in mesh size of 100 and 60. The research results show that soxhletation extraction at mesh 100 optimum increases at a temperature of 70°C within 4 hours. Where the yield of oil produced was 11.62%. Meanwhile, for mesh 60, the optimum increase occurred at a temperature of 65°C within 4 hours with an oil yield of 12.90%. Rice bran oil extraction, the content of in rice bran oil extraction, the content of alkenes, aldehydes, and alkene bending.
Solving the Fermi equation for Modeling Nuclear Decay: Approaches, Assumptions, and Limitations in the Context of the Thomas-Dirac Distribution Siagian, Ruben Cornelius; Nasution, Budiman; Jubaidah, Jubaidah
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.v27i2.4424

Abstract

This study explores a sophisticated probabilistic model for radioactive decay, emphasizing decay probability in small time intervals. Equation (1), with decay constant and time interval (dt), is central. Integration yields Equations (2), (3), and (4), describing total decay (N) over larger intervals (T). The Poisson distribution links to Equation (5), depicting decay events with average rate. In radioactive decay, the binomial distribution is relevant for independent nuclei (R). Equations (7) and (8) outline the probability of observing (N) decays, utilizing the binomial distribution and coefficient. Equation (9) simplifies via the Poisson distribution and factorial (n), notably eliminating (R-N). This reveals the efficiency of representing binomial distribution properties. The study extends to analyzing radiotracers in nuclear medicine through visualized data, revealing properties like half-life and decay constants on graphs. Graphical analysis identifies time's role in deviation from true values, offering insights into radiotracer reliability. This amalgamation of probabilistic methods and radiotracer analysis significantly contributes to understanding and applying radioactive decay concepts in diverse scientific and medical contexts.
Analysis of The Relationship of Rework and Inventory to Waste in The Ciputra Hospital Surabaya Project Ferdiandika, Ahmad Fadhil; Nuciferani, Felicia Tria; Choiriyah, Siti; Harianto, Feri
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.v28i2.5924

Abstract

Currently, the construction sector is adopting the theory of production in the manufacturing industry, known as lean construction, to reduce waste and increase value. Last Planner System (LPS) has not been widely used and has good potential because the advantage of LPS is to identify a job along with obstacles to improve performance in a construction project. In the construction of Junior High School (SMP) Al-Falah, it has work obstacles due to erratic weather so that the project is delayed, the author conducts a field survey to analyze the actual progress in the field, LPS has work indicators / work flow to measure the extent to which work indicators can be realized properly, the LPS work flow are Master Plan, Phase Pull Planning, Lookahead Planning, Constraints Analysis, Shielding Production, and Percent Plan Complete (PPC) as a standard for measuring whether project productivity is realized properly or not. In this study, the results of the implementation using LPS on the Al-Falah Junior High School construction project show that the lowest PPC can be seen in week 7, which is 0% because there is no work achievement so that the work is delayed, while in week 16 it can be seen that PPC has increased dramatically to 96%. Then after averaging the PPC of 51% which means that LPS has not been able to increase the reliability of planning above 70%, (Ballard, 2000).
Thermal Analysis of Greenhouse Environment Using Computational Fluid Dynamics (CFD), Case Study in ITERA Drantantiyas, Nike Dwi Grevika; Ramli, Asyarf Nur; Suaif, ahmad; Yehezkiel, Listra Ginting
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.v28i2.6808

Abstract

Greenhouse is a modern agricultural technology that allows for increased agricultural yields. The purpose of this study was to analyze the thermal distribution in the greenhouse of the Sumatra Institute of Technology (ITERA) in 3 time conditions, namely in the morning, afternoon and evening. The method used is CFD modeling using Solidwork. The dimensions of the greenhouse are 12.5 x 25 x 4.26 m³. The greenhouse is divided into a grid into 20 thermal measurement points separated by 2.5 m. The greenhouse has 2 cooling pads and 2 exhaust fans separated by 12.5 m. Model validation using MAPE and R2. The results of the analysis show that 3 models have valid results with MAPE 10% and R2 0.75 and can continue in the review of thermal distribution. of the 3 time condition models that provide a thermal distribution of 28 - 37 ℃. Morning conditions are hotter than afternoon and evening. Cold air from the cooling pad sucked by the exhaust fan is only able to control an area 50%. So the thermal distribution of the greenhouse needs improvement.
Utilization of Hospital Solid Waste as Paving Blocks Rini, Intan Dwi Wahyu Setyo; Lukman, Fadillah Afdalya; Gunawan, Adrian
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.v28i2.5964

Abstract

A hospital as a health facility has the potential to produce medical waste, which is harmful to the environment, if it is not handled properly and correctly. At Hospital X, infectious medical waste is chopped and sterilized at temperatures above 100oC using a sterilwave to reduce the size of the waste and hand it over to a third party at a substantial cost. This waste has the potential to be used as construction materials, such as paving blocks, which are used as parks in the hospital area. Therefore, this research was conducted to determine the best paving block mix design and composition using chopped medical waste as a fine aggregate substitution. In addition, this research carried out a TCLP test on paving blocks that had the best water absorption to find out whether paving blocks are good enough to strip potential soil contamination. The quality target for paving blocks in this study was to meet class D quality with a minimum compressive strength of 8.5 MPa and a maximum water absorption of 10%. The quality of compressive strength and water absorption was based on SNI 03-0691-1996, and the TCLP test referred to Indonesia Government Regulation Number 22 of 2021. The results showed that the mix design used is 1:5 for the ratio of cement and fine aggregate with an average compressive strength of normal paving blocks of 10 MPa. Whereas paving blocks with a mixture of medical waste with the best absorption were those with as much as 8% substitution of fine aggregate, with an average compressive strength value of 10 MPa. The results of the TCLP test on the best specimens showed that the levels of heavy metals in medical waste paving blocks met the TCLP A quality standards and were safe for use in hospital parks.
Designing A Household Waste ShredderMachine Using The Quality Function Deployment Method Pradana, Fendy Nia; Jakaria, Ribangun Bamban
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.v28i2.6834

Abstract

Household waste, especially inorganic waste, is becoming an increasingly pressing challenge in waste management in the community, which can have a negative impact on the environment if not handled properly. This research aims to design a portable, effective, and efficient household waste shredding machine by developing essential attributes such as automatic, ergonomic, easy to operate, durable, safe to use, low cost, easy to disassemble, not easily damaged, and easy to move. The method used is Quality Function Deployment (QFD), which enables the identification and fulfilment of user expectations through in-depth analysis of the voice of the customer. The results showed that of the attributes developed, the most dominant attributes were safety in use and ease of operation, followed by portability and durability. Meanwhile, users considered attributes such as ease of disassembly and low cost less critical. The resulting machine design is able to fulfil all the criteria set by users. It provides an innovative solution to improve the efficiency of inorganic waste management at the household level to provide convenience, safety, and portability in its use. From the weighting of attribute values, the most dominant order to the last is the attribute of easy to move with a value of 10,542, easy to disassemble 9,404, safe when used 8,821, ergonomic 8,151, easy to operate 6,630, durable 6,248, low cost 5,439, the machine is not easily damaged 5,283, automatic 5,110.
INVERSE DISTANCE WEIGHTED METHODS IN GROUNDWATER MODELLING PONJONG AREA, GUNUNG KIDUL REGENCY, SPECIAL REGION OF YOGYAKARTA, INDONESIA Sari, Avellyn Shinthya
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.v28i2.5982

Abstract

Groundwater modeling is needed to display the underground dimensions of groundwater. The Inverse Distance Weighting (IDW) technique is the choice as the basis for groundwater model analysis because the analysis using this technique remains accurate even though it only uses a few sample points. The groundwater model in Sidorejo Village, Ponjong District, Gunungkidul Regency, Yogyakarta Special Region has a water thickness of between 4.5 – 13.85 meters. With a pore aquifer system, because based on data from field observations and interpretation of geological maps, Sidorejo village, Ponjong District, Gunungkidul Regency, Yogyakarta Special Region is included in the Wonosari formation with geological structures in the form of limestone, reef, calcarenite, calcarenite tuffan. As for the direction of groundwater flow to the west, following the slope of the slope found at the study site. While the results of groundwater quality analysis using the Inverse Distance Weighting (IDW) technique by testing several parameters including the degree of acidity (pH), electrical conductivity (DHL), Total Disolved Solid (TDS), iron (Fe), calcium (Ca) , magnesium (Mg), and calcium carbonate (CaCO3) it can be concluded that all test well samples indicated no contamination because all test parameters were still within normal limits.
Comparative Study on the Kinematic Performance of Front Wheel Drive (FWD) and Rear Wheel Drive (RWD) Vehicles Ismail, Ahmad Yusuf; Zuntion, Reyhan Bahauddin Ramadhan
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.v28i2.6836

Abstract

The automotive industry has continuously innovated drive systems. Among various types, Front Wheel Drive (FWD) and Rear Wheel Drive (RWD) systems are widely used. This research examines the influence of these systems on acceleration and deceleration performance through field tests conducted on public highways. Five speed variations—40, 60, 80, 100, and 110 km/h—were tested for acceleration and deceleration. Results indicate RWD vehicles outperform FWD vehicles in acceleration due to the rear location of the drive wheels, providing superior propulsion. Conversely, FWD vehicles demonstrate better deceleration performance, attributed to shorter braking distances and improved braking efficiency.

Page 32 of 38 | Total Record : 378

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