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Journal of Science and Applicative Technology
Published by Institut Teknologi Sumatera
ISSN : 25810545     EISSN : 25810545     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Materials Science & Nanotechnology Mechanical Engineering
Journal of Science and Applicative Technology is soon indexed by google scholar, SINTA (Science and Technology Index), portal garuda, DOAJ (Directory of Open Access Journals). This journal has been registered at PDII LIPI (ISSN: 2581-0545). This journal is semiannual journal. It will be published in June and December. The objective of the journal is to provide a room for students, researchers, lecturers, pratictioners and communities to present their ideas regarding several topics covered in this journal. Journal of Science and Applicative Technology covers wide area of research. We welcome full research articles in the following area, including but not limited to : 1. Renewable Energy 2. Green Infrastructure 3. Community Development 4. Computer Science 5. Civil and Environmental Engineering 6. Electrical Engineering 7. Mechanical Engineering 8. Telecommunication 9. Earth and Planetary Sciences (Geography, Geodesy, Geology, Geophysics, Oceanography, Astronomy, Atmospheric) 10. Natural Sciences (Mathematics, Chemistry, Physics, Statistics) 11. Life Sciences (Biochemistry, Biology, Pharmacy) 12. Regional and City Planning
Arjuna Subject : -
Articles 228 Documents
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Studi Batuan Asal (Provenance) Batupasir Formasi Simpangaur Daerah Way Krui, Lampung Alviyanda Alviyanda; Candra Sadaperarih Sipayung
Journal of Science and Applicative Technology Vol 7 No 1 (2023): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i1.1086

Abstract

Bengkulu basin is the one of fore arc basin which formed in Sumatra island. The basin formation is inseparable from tectonic activity of the Sumatra Island from the Pre-Tertiary era to present day. The relationship between tectonic activities and the basin filling can be identified by conducting a provenance study on the sedimentary rocks. The Simpangaur Formation is a Tertiary sedimentary rock that has filled the Bengkulu Basin in the southern Sumatra. The aim of this research is determining the provenance of Simpangaur Formation existed in Way Krui area, Lampung, and its tectonic environment. The observations of thin section were carried out on eleven sedimentary rock samples obtained from field. The provenance of these rocks is analyzed by quantifying the mineral composition microscopically. The result analysis show that the grains originated from a magmatic arc environment, specifically the transitional arc and undissected arc. Based on the presence of polycrystalline quartz in eleven rock samples, it is interpreted as originating from the Orogen Arc. In addition, it is also interpreted that the provenance for sandstone samples of the Simpangaur Formation are plutonic and metamorphic rocks in a semi-arid climate, based on ancient climate.
Analisis Sifat Mekanik dari Struktur Seluler yang Difabrikasi dengan Printer 3D Abdul Muhyi; Riyan Ferdiyanto; Kardo Rajagukguk; Wahyu S. Sipahutar; Muhamad Fatikul Arif
Journal of Science and Applicative Technology Vol 7 No 1 (2023): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i1.370

Abstract

Struktur ringan berbentuk cellular (seluler) atau foam (busa) dalam beberapa tahun terakhir sangat banyak dikembangkan terutama karena perkembangan cepat dari Printer 3D, sehingga desain rumit dapat difabrikasi dengan mudah. Struktur seluler mempunyai rasio kekuatan terhadap massa dan kekakuan yang tinggi, serta dapat diaplikasikan pada struktur ringan dengan ketahanan impak yang tinggi. Dalam tulisan ini, dilakukan uji tekan terhadap enam jenis struktur seluler dengan fraksi volume 10%. Jenis struktur seluler yang divariasikan adalah Cubic, Gyroid, Honeycomb 3D, Rectilinear, Honeycomb, dan Rectilinear 45o. Hasil yang didapat menunjukkan bahwa struktur kompleks jenis Cubic mempunyai kekuatan maksimal terbaik dan juga mempunyai penyerapan energi yang terbaik berdasarkan pengujian yang dilakukan, diikuti dengan struktur Gyroid dan Honeycomb 3D. Struktur yang mempunyai topologi dua dimensi yaitu, Rectilinear 0o, Rectilinear 45o, dan Honeycomb tidak mempunyai kekuatan dan karakteristik penyerapan energi yang baik. Hasil ini dapat digunakan sebagai panduan desain struktur ringan yang mempunyai karakteristik kekuatan dan penyerapan energi mekanik yang tinggi.
SELULOSA NANOSERAT TANDAN SAWIT SEBAGAI MATRIKS FILM INDIKATOR ALAMI KESEGARAN PANGAN Yusnaidar Yusnaidar; Wilda Syahri; I Putu Mahendra
Journal of Science and Applicative Technology Vol 7 No 1 (2023): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i1.1095

Abstract

The food freshness is one trending topic that currently studied to reduce the number of food waste. The development of food freshness film indicator is one technique that can be utilized to resolve the high number of food waste. The objective of this study was to evaluate the ability of cellulose nanofiber film that had been integrated with anthocyanine as the food freshness film indicator. Cellulose nanofiber was obtained from empty fruit bunch of palm oil that had been dried, cut, and milled into fine powder. The initial step of this preparation was bleaching process using NaOCl/NH3 and H2O2/NH3. After bleaching process, cellulose fiber was oxidized using TEMPO/NaOCl/NaBr at pH 10 for 6 h. The TEMPO-oxidized cellulose fiber was then transferred into high pressure-homogenizer for 6-cycles at 800 bar of pressure. The cellulose nanofiber was obtained as hydrated fiber (gel-like) and then combined with anthocyanine obtaining from red cabbage extract, the film was casted on the acrylic plate. The film indicator of cellulose nanofiber was analyzed to determine the characteristic of film, i.e., color stability depending on pH, morphology, mechanical properties, and color response of film on the food freshness. The film of cellulose nanofiber that integrated with anthocyanin extract has the good sensitiveness to test the food freshness at 4oC. The color change produced by this indicator film is quite significant and has a different color at each pH value.
Estimation of methane emission from Piyungan landfill using IPCC method Yuli Pratiwi; Paramita Dwi Sukmawati; Fisher Inco Rande Bunga
Journal of Science and Applicative Technology Vol 7 No 1 (2023): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i1.953

Abstract

One of the greenhouse gases that causes climate change is the emission of methane (CH4) produced by landfills. The methane comes from the anaerobic decomposition of organic matter in the waste at the landfill. The purpose of this study is to estimate methane emissions at the Piyungan landfill, Bantul, Yogyakarta, from 2021 to 2025 using IPCC method. No similar work has been conducted so far, especially in the Piyungan landfill. The result shows that methane emissions produced at the Piyungan landfill in 2021 is 544.05 tons with a total waste generation of 549.49 tons/year and is dominated by 88% organic waste. Meanwhile from 20,786 tons of waste generated in 2025, the methane emissions are estimated to be 573.85 tons. To minimize the methane emission from Piyungan landfill, it is recommended mitigation and adaptation efforts, i.e., the 3R method (reduce, reuse, recycle), the composting of organic waste, the addition of gas ventilation pipes. The methane gas from the Piyungan landfill should be explored as alternative energy fuel in future work.
Kinerja Ratio Silika-Cat Dengan Metode Dipcoating Pada Permukaan Logam Untuk Penghambat Laju Korosi Lisnawaty Simatupang; Rikson Siburian; Elfrida Ginting; Junifa Layla Sihombing; Herlinawati Herlinawati; Alex Suhendra Munte; Kristian Adinata Pratama Simatupang; Dea Gracella Siagian
Journal of Science and Applicative Technology Vol 7 No 1 (2023): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i1.1311

Abstract

Silica oxide (SiO2) is a chemical compound that can be obtained from the extraction of volcanic ash from Mount Sinabung. Silicon dioxide has the properties of high porosity, high mechanical strength, high thermal stability, large pore surface area, stable surface in acidic media so that it can be applied in the chemical coating field.This research aims to measurement of performance natural silica from volcanic ash of mount Sinabung Indonesia as additives to the paint to inhibit corrosion rate in metal surface. The addition of silica additives to the paint was carried out by dispersing (0; 0.5; 0.75; and 1) g with 10 mL of paint with each composition carried out for 60 minutes. Iron plate in sandpaper with 1500 grid and polished with bludru cloth using autosol metal polish, then coated with paint and a combination of silica-paint through the dipcoating method. The corrosion test was carried out on a corrosive solution of HCl 15% (v/v) and NaCl 3.5% (w/v). The corrosion rate using HCl 15% (v/v) showed C (0,286) mpy, SC1 (0,123) mpy, SC2 (0,149) mpy, SC3 (0,120) mpy. While at 3.5% (w/v) NaCl, namely C (0,282) mpy, SC1 (0,120) mpy, SC2 (0,142) mpy, SC3 (0,098) mpy. Inhibitor efficiency for various variations of silica composition in corrosive HCl 15%(v/v) solution, e.g., SC1 (56,9%), SC2 (47,9%), and SC3 (58,04%). The inhibitor efficiency at various compositions of silica in NaCl 3.5% (w/v) are SC1 (57,44%), SC2 (49%) dan SC3 (65,24%).
Rancang Bangun Kursi Roda Bermotor Elektrik Dengan Sistem Pengendalian Gestur Untuk Penyandang Tetraplegic Marten Darmawan; Joseph Fernando Budi Prasetyo; Arka Dwinanda Soewono
Journal of Science and Applicative Technology Vol 7 No 2 (2023): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i2.1447

Abstract

Improving medical services is continuously prioritized for the sake of achieving the welfare of all people in the world, and by providing good services in the medical field, people's needs will be increasingly fulfilled. Limitations of movement in someone with a disability, such as persons with disabilities tetraplegic in terms of mobility, are often obstacles. Therefore, a media-assisting movement is needed. This study designed an electric wheelchair that can help users with disabilities tetraplegic in moving without the need for too much force as in a standard wheelchair. This electric wheelchair uses automation by utilizing Accelerometer, which can detect vectors or so-called gyroscopes and connect with Arduino as the processor is continued to the DC motor as the driving force. Based on the test data, it was found that the design of this wheelchair moves as desired. This can be seen from the change in speed of the driving motor to changes in the tilt of the accelerometer mounted on the head. In the forward motion test, the maximum motor speed is 35 RPM when the accelerometer angle is at a slope of 64.7o positive axes. Meanwhile, the backward movement of the wheelchair occurs when the accelerometer is at a slope of -21.1o and produces a speed of 11.2 RPM on wheels. The rider's maximum load is designed to be 50 Kg.
Pengaruh Suhu dan Waktu Ekstraksi dalam Proses Pembuatan Pektin dari Kulit Buah Sukun dengan Pelarut Asam Sitrat Rizka Nurlaila; Agam Muarif; Meriatna Meriatna; Masrullita Masrullita; Ishak Ishak
Journal of Science and Applicative Technology Vol 7 No 2 (2023): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i2.1105

Abstract

The breadfruit rinds has never been used, even though breadfruit rinds is known contain pectin which has a high economic value. Pectin is a biopolymer compound that functions as a water binder or liquid thickener obtained through the extraction process of fruits waste. The purpose of this research is to utilize the waste of breadfruit rinds into pectin to increase the economic value. This research used reflux extraction method with 7% citric acid as solvent, extraction time used was 170, 175,180, 185, and 190 minutes at 85, 90, and 95°C. The highest research results were obtained at a temperature of 95°C with a long extraction time of 195 minutes, namely yield of 40,762%, water content of 1,92%, methoxyl content of 8.06%, galacturonic content of 81%.
Condition of Coral Reef in Kelagian Besar Island Novriadi Novriadi; Khairul Anam; Abdul Aziz
Journal of Science and Applicative Technology Vol 7 No 2 (2023): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i2.1455

Abstract

The coral reef ecosystem plays many important roles for society. One of the its role is as a tourist attraction. Kelagian Island lies near Pahawang island which is the major attraction of marine tourism in Lampung. This position makes Kelagian Island the most potential alternative island after Pahawang Island. However, sufficient information about the coral condition and profile in Kelagian Island has yet to support this potential. For that reason, a study about coral reef conditions on Kelagian island must be conducted to provide information and support the possibility of tourism development on Kelagian island. This study was conducted in August 2022 using Point Intercept Transect (PIT) in three different sites on Kelagian Island. Coral reef condition in 3 meter depth were generally in good condition, meanwhile in 7 meters depth coral reef condition were in medium state. There were 22 genera found in Kelagian island. Acropora and Porites were found dominating three meter depth. On the other hand in seven meter of depth, Goniopora and Favia were abundantly found. Diversity index, Evenness, and Dominance Index in Kelagian Island are 2,29-2,49 (medium), 1-0,83 (stable), and 0,12-0,15 (low) respectively.
Optimalisasi Sistem Angkutan Sampah di Kelurahan Pulau Setokok dengan Pemanfaatan Sistem Informasi Geografis (SIG) Farouki Dinda Rassarandi; Oktavianto Gustin; Rizki Widi Pratama; Zara Azhari; Laras Dwi Ramdanni; Moh Bagus Rahmadi; Karisma Pratama Ramadhan; Nurhadi Bashit
Journal of Science and Applicative Technology Vol 7 No 2 (2023): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i2.748

Abstract

The increasing population in Pulau Setokok Village has led to an increase in the waste generation which is not supported by the availability of representative TPS. In addition, the weak waste management system also makes this issue a major problem in the area. One of the important aspects in waste management on Setokok Island is the waste transportation system. The purpose of this study was to determine the location of alternative TPS in Pulau Setokok Village based on SNI No.19-3241-1994, analyze the suitability of the existing TPS in Pulau Setokok Village based on the SNI and optimize the waste transportation system from the existing TPS in Pulau Setokok Village to the nearest TPA with apply Network Analysis GIS. The determination of the recommended location for the TPA in the Pulau Setokok Village in this study was technically determined from the highest score of the feasible zone at the allowance stage, where it was found that the highest score in the allowance stage was 282, covering an area of ​​2.1 Ha, which is relatively in the middle of Setokok Island which is crossed by the Trans Barelang road. The location of the existing TPS on Pulau Setokok is not in the recommended TPA location based on SNI No.19-3241-1994. The length of time for transporting waste using a Dump Truck is 108.6 minutes which is faster than an Arm Roll Truck (173 minutes) for round-trip waste transportation from TPA Punggur – TPA Recommendation of Pulau Setokok – TPA Punggur on the shortest route of 2 times 36.2 km. the use of Arm Roll Truck fuel is more efficient, which is Rp 93,637.33 for 1 trip compared to the Dump Truck (Rp 117,046.67), but the Arm Roll Truck transports less waste than the Dump Truck because of its smaller capacity, which is 7.2 m3 compared to the Dump Trucks of 12 m3.
Hydrodynamic numerical investigation and sedimentation, a study cases in Lontar steam-electric power plant Suciana Suciana; Alamsyah Kurniawan
Journal of Science and Applicative Technology Vol 7 No 2 (2023): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i2.1451

Abstract

The intake pump of the Lontar steam-electric power plant cannot operate optimally due to a drawdown in the forebay. The capacity of the conveying channel decreases, possibly caused by sedimentation at the intake mouth. So, an initial investigation is required using hydro-oceanographic and sedimentation numerical modeling in that area. Numerical modeling is conducted to simulate flow phenomena to obtain a model and measurement data for qualitative assessment. Hence, the flow condition in the study area is a mix of ocean current and circulating water pump discharge. Hydrodynamic modeling has been successfully conducted to assess their interaction in this zone properly by using open-source software called Delft3D Hydro-morphodynamic. This research uses primary data or field measurement data like bathymetry, sediment, and discharge data for input. Model calibration used tidal and current data. Based on the results of the numerical modeling, it is evident that sediment deposition occurs at the intake mouth area due to the suction of the circulating water pump unit, resulting in sediment being carried and deposited during high water levels and a slowing down of flow rate. Sedimentation issues can addressed through dredging, and for the long-term recommendation to install a breakwater to extend the dredging service life at the intake mouth.

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