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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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Pengujian Kadar Zat Terlarut Memanfaatkan Sistem Instrumentasi Maya untuk Penentuan Kualitas Air Bersih Sabar Sabar; Duwi Hariyanto; Kisna Pertiwi; Madi Madi; Zunanik Mufidah; Rudi Setiawan; Khoirun Naimah
Journal of Science and Applicative Technology Vol 5 No 2 (2021): 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.v5i2.412

Abstract

Telah dilakukan perancangan dan pembuatan sistem instrumentasi dan akuisisi data uji kandungan zat yang terlarut dengan menggunakan prinsip konduktivitas berbasis LabVIEW dan mikrokontroler. Sistem instrumentasi ini mampu mengakuisisi data dengan mengkombinasikan LabVIEW sebagai program akuisisi data pengukuran sedangkan mikrokontroler beserta sensor koduktivitas berperan sebagai tranduser untuk mengubah besaran fisis menjadi sinyal listrik berupa tegangan. Hasil data analog zat yang terlarut akan dikirim oleh mikrokontroler ke LabVIEW melalui komunikasi serial dengan USB port yang dihubungkan ke komputer yang telah terinstall aplikasi LabVIEW dengan tambahan konfigurasi VISA untuk port serial, kemudian data diolah dan ditampilkan pada front panel pada LabVIEW dengan tujuan sebagai proses monitoring dan pengukuran kualitas air pada industri yang dapat diatur sesuai tampilan yang diinginkan pengguna (User Friendly) dibandingkan Penggunaan LCD bersifat terbatas pada fitur tampilan (Front Panel) dan Proses Pengolahan data pada blok diagram. Sistem instrumentasi yang telah dibuat memiliki nilai koefisien determinasi ( R2 ) adalah 0,955 yang menunjukan bahwa hasil pengukuran dari sistem instrumentasi mampu mendapatkan hasil pengukuran yang baik. Hasil penelitian kandungan zat yang dilarutkan dalam air yang disebut nilai Total Dissolve Solid (TDS) masih perlu pengembangan sistem dari segi kuantitas jumlah sensor untuk mengukur lebih banyak banyak lagi indikator yang mempengaruhi kualitas air bersih.
Optimasi Sintesis Methyl Cellulose (MC) dari Biji Salak (Salacca edulis Reinw) Pondoh Super Amalia Wahyuningtyas; Agus Setyoko; Sri Anggrahini; Djagal Wiseso Marseno
Journal of Science and Applicative Technology Vol 5 No 1 (2021): 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.v5i1.389

Abstract

Snake fruit (Salacca zalacca) is one of the typical fruits from Indonesia. Pondoh is one of the snake fruit species largely found in Yogyakarta. The kernels of snake fruit are wastes, but contains a lot of cellulose. Cellulose can be processed into methyl cellulose And be used as food additive. This study aimed to understand the optimized the optimizing synthesis of methyl cellulose through the concentration of NaOH, dimethyl sulfate and reaction temperature. The study was conducted by extracting cellulose using 4 % NaOH concentrations. Dehemicellulose and bleaching were done to dilute hemicellulose and lignin. The optimization of methyl cellulose was done using Response Surface Methodology with various concentrations of NaOH (10, 15, 20, 25, 30%), dimethyl sulfate (2, 3, 4, 5, 6 ml), and temperature (45, 50, 55, 60, 65°C). NaOH could change cellulose crystalline region and formed Na-cellulose. Dimethyl sulfate can be acted as substitution agent, while temperature controlling plays role to obtain appropriate conditions for reaction. The results showed that the use of NaOH concentration, dimethyl sulfate and temperature affected the degree of substitution, OHC and lightness. The addition of NaOH and dimethyl sulfate in producing methyl cellulose had more effect on the increasing of degree of substitution than temperature treatment. The optimum condition of methyl cellulose were 0.91% NaOH; 3.52 ml of dimethyl sulfate, at 46.51°C temperature.
Evaluasi Satellite Precipitation Product (GSMaP, CHIRPS, dan IMERG) di Kabupaten Lampung Selatan Alvin Pratama; Hayim Muhammad Agiel; Ade Ayu Oktaviana
Journal of Science and Applicative Technology Vol 6 No 1 (2022): 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.v6i1.702

Abstract

The availability of rainfall data is an important requirement in various activities. The limitations of observational data make the satellit precipitation product (SPPs) as an alternative. However, the data must be verified before being used. Verification methods are done by using matric statistic methods such as correlation, error and relative bias. Meanwhile, to see the ability of SPPs in detecting rainfall events, it uses a contingency table method. The purpose of this research is to evaluate the ability of SPPs against observation data. Evaluation of SPPs rainfall data is carried out based on a time scale, namely monthly, 10 daily, and daily. This research uses the data from 2018–2020. On a monthly and 10 daily scale, the CHIRPS data shows excellent linearity and rain detection ability. On a daily scale, IMERG shows better linearity than GSMaP and CHIRPS in every season, with moderate to strong correlation coefficients. However, these data tend to be underestimated with a very large bias. In terms of detecting daily rain, GSMaP tends to be better than CHIRPS and IMERG on every season based on the CSI index. However, in the dry season and transition II, the ability tends to be lower. In general, for the amount of rainfall intensity, the three SPPs data still has a fairly large error against the observation data eventhough the ability to detect rainfall is good.
Simulasi unjuk kerja kolektor surya PV/T berdasarkan bentuk penampang pipa absorber Amrizal Amrizal; Amrul Amrul; Herry Wardono; Angelia Eka Salsabillah; Amrizal Danur Sasongko
Journal of Science and Applicative Technology Vol 5 No 1 (2021): 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.v5i1.375

Abstract

Salah satu peralatan yang dapat memanfaatkan energi matahari adalah kolektor surya hybrid PV/T. Kolektor jenis ini merupakan gabungan antara panel surya dengan kolektor termal sehingga dapat menghasilkan energi listrik dan energi termal dalam waktu bersamaan. Namun jika terjadi peningkatan temperatur pada permukaan panel PV maka akan terjadi penurunan unjuk kerja dari panel PV tersebut. Tujuan dari penelitian ini adalah untuk mengetahui sekaligus membandingkan unjuk kerja kolektor surya hybrid PV/T secara termal dan pressure drop berdasarkan perbedaan bentuk penampang pipa absorber. Penampang pipa yang dibandingkan adalah berbentuk persegi panjang dengan pipa bulat. Pendekatan atau tahapan penelitian yang dilakukan adalah melalui metode pengujian dan simulasi unjuk kerja kolektor PV/T. Proses pengujian diperlukan untuk mendapatkan data pembanding terhadap hasil simulasi yang dilakukan. Dalam penelitian ini metode pengujian unjuk kerja termal berdasarkan standar EN 12975 yang dilakukan secara indoor dengan menggunakan solar simulator. Proses simulasi menggunakan software CFD (Ansyst Fluent) untuk mengembangkan atau memprediksi unjuk kerja kolektor. Setelah proses validasi, Program Ansyst Fluent yang digunakan dapat diterima untuk mensimulasikan karakteristik kinerja kolektor PV/T karena terdapat perbedaan hasil eksperimen dengan simulasi sekitar 6 %. Lebih lanjut, hasil simulasi menunjukkan bahwa penggunaan pipa persegi mampu meningkatkan efisiensi termal kolektor PV/T dibandingkan dengan penggunaan pipa bundar. Namun terdapat kenaikan nilai pressure drop pada penggunaan pipa persegi lebih tinggi sekitar 11.49% dari pipa bundar.
Linear Array Thinning with Cavity backed U-slot Patch Antenna using Genetic Algorithm Novalia Pertiwi; Fannush Shofi Akbar; Eko Setijadi; Gamantyo Hendrantoro
Journal of Science and Applicative Technology Vol 5 No 1 (2021): 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.v5i1.386

Abstract

In this paper, a thinned linear array with Cavity backed U-slot Patch has been investigated using the Genetic Algorithm to minimize peak sidelobe level and the number of antenna elements. One of the essential steps in the Genetic Algorithm method is a crossover, which uses the Paired Top Ten and Combined Top Five rules applied to the Cavity backed U-slot Patch antenna. The peak sidelobe level value is -18.63 dB with a array filling of 63.33% at the broadside angle using Combined Top Five rules. In Paired Top Ten, the peak sidelobe level value is -19.48 dB with a array filling of 70%. The two methods are still better as compared to a dense array. This study is essential in the development of radar technologies since it needs a low sidelobe level.
Dampak Ekonomi Bagi Komoditas Unggulan Dalam Pembangunan Jalan Tol Trans Sumatra (JTTS) Bakauheni-Kayu Agung Muhammad Zainal Ibad; Devana Tsintaniarsy Iskandar; Farid Adam; Syifa Novia Tabrani
Journal of Science and Applicative Technology Vol 5 No 2 (2021): 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.v5i2.278

Abstract

Pembangunan Jalan Tol Trans Sumatera (JTTS) telah tercantum dalam Masterplan Percepatan dan Perluasan Ekonomi Indonesia (MP3EI) yang telah diundangkan dalam Peraturan Presiden Nomor 48 Tahun 2014 Tentang Perubahan Atas Peraturan Presiden Nomor 32 Tahun 2011 Tentang Masterplan Percepatan dan Perluasan Ekonomi Indonesia (MP3EI) 2011-2025. Pembangunan JTTS juga telah menjadi bagian dari Asian Highway Network. Dengan adanya JTTS, konektivitas antar wilayah tentunya akan semakin mudah dan perpindahan barang akan lebih cepat serta berdampak terhadap pertumbuhan ekonomi suatu wilayah. Perpindahan barang yang dimaksud dalam penelitian ini adalah komoditas unggulan di setiap wilayah Provinsi Lampung-Sumatera Selatan. Tujuan dari penelitian ini adalah untuk mengkaji dampak ekonomi JTTS Bakauheni-Kayu Agung dalam pengembangan wilayah Lampung-Sumatera Selatan. Metode penelitian yang digunakan adalah deskriptif kualitatif. Hasil penelitian menunjukkan bahwa setelah adanya pembangunan JTTS perpindahan komoditas lebih cepat karena efisiensi waktu, namun terdapat perpindahan yang apabila menggunakan JTTS tidak memberikan efisiensi waktu.
Sleep Deprevation Effect On The Driving Activity Using Sustained Attention Test Fandy Valentino; Hardianto Iridiastadi
Journal of Science and Applicative Technology Vol 4 No 2 (2020): 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.v4i2.363

Abstract

The rate of train accidents in Indonesia is still high, mainly caused by humans related to fatigue while on duty. One of the factors that influence the level of fatigue is the duration of the previous sleep time which causes the level of alertness at work to decrease. This study aims to determine how significantly a person alertness performance decreases due to sleep deprivation using Sustained Attention Test. The study was conducted with laboratory experiments using a train simulator involving twelve participants aged 21.2 ± 0.92 years. The independent variable is the duration of sleeping time before driving with a duration of eight hours for normal conditions and a duration of two hours for sleep deprivation. The dependent variable is the parameter on the Sustained Attention Test which is tested before and after driving using the Kruskal-Wallis test. The results showed that there was a increase in the value of the Sustained Attention Test, especially the error and miss parameters which were significant due to sleep deprivation with an average significance of p-value less than 0.05 and increasingly significant with an average of p-value less than 0.01 after driving activity. This shows that sleep deprivation greatly affects the drivers performance while on duty.
Jenis-Jenis Gastropoda di Zona Intertidal Pantai Indrayanti Yogyakarta Dian Fita Lestari; Fatimatuzzahra Fatimatuzzahra; Syukriah Syukriah
Journal of Science and Applicative Technology Vol 5 No 1 (2021): 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.v5i1.301

Abstract

Gunung Kidul is one of the districts in Yogyakarta that has a long coastline with coral substrate and white sand. One of the beaches with coral and rocky substrates is Indrayanti Beach. The rocky substrate provides unique characteristics for the life of marine organisms in the intertidal zone. Gastropods is one of the seven classes in the Mollusc phylum. Gastropods are found mostly in the sea and fresh water, especially in the intertidal zone of beach. The aim of this study is to identify gastropods that found in the Indrayanti intertidal zone and classifying each species. The method of this study is observation and sampling techniques with accidental sampling at low tide. Data analysis is descriptive based on morphological characteristics of each species. Based on the results of this study, there are 5 sub-classes, 9 orders, 2 Superfamily, 21 families, 35 genera and 72 species. Sub-classes found are heterobranchia, caenogastropods, neritimorpha, vestigastropods, and patelogastropods. The highest number of species found in the caenogastropod subclass was 32 species (44% of the total species) which were dominated by the order of neogastropod.
Kebutuhan Lahan Pertanian Minimum untuk Kesejahteraan Petani di Pulau Sumatera Baiq Rindang Aprildahani; Chrisna Trie Hadi Permana; Surya Tri Esthi Wira Hutama
Journal of Science and Applicative Technology Vol 5 No 1 (2021): 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.v5i1.409

Abstract

The stream of sustainable city-region pinpoints the need to build an enhanced life support system. While it is expected to provide adequate foods for the current and future generation, the agriculture sector is, nevertheless, facing a challenge to sustain amidst the current massive urban sprawl. The study presents a case study of Western Indonesia, which is considered as one of the vast growing regions. The growth of urban centres creates a centrifugal force, resulting in a leapfrog development towards the outskirts, which usually causes the loss of prime agricultural lands. Existing planning documents were also unable to control the sprawling phenomenon, which impact at the current setback of farmers’ well-being. Previous studies show that the ability of peri-urban agriculture to accommodate self-provision of food and to ensure adequate income for farmers appear as the most prominent motivation which encourage farmers to stay engaged in farming sectors (Adrianto et al., 2013). Overall, this study uses qualitative analysis to investigate opportunities to preserve agriculture land by find out the requirement of agriculture land for farmer’s well being. This research comparing the minimum wage of each province in Sumatera and the income of farmers from agricultural production, so it is known that farmers on the island of Sumatra must have an average land area of 0.85 hectares to achieve welfare.
FORMULASI NANOEKAPSULASI EKSTRAK DAUN KELOR (Moringa oleifera) /KITOSAN-NATRIUM TRIPOLIPOSFAT (NaTPP) Vivi Purwandari; Isnaeni Isnaeni; Rizka Rahmi; Ahmad Zukhruf Akbari; Muhammad Zaim Akbari
Journal of Science and Applicative Technology Vol 6 No 2 (2022): 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.v6i2.1100

Abstract

Moringa (Moringa oliefera) contains several antioxidant compounds such as quercetin and chlorogenic acid. However, antioxidants have weaknesses, namely that they are easily damaged by exposure to oxygen, light, high temperatures, and drying. One way to maintain and increase the stability of antioxidants is by encapsulation. The purpose of this study was to determine the optimum formulation of quercetin nanoencapsulation of moringa leaf extract using chitosan and sodium tripolyphosphate (Na-TPP) using the ultrasonication method. Moringa leaf extract was obtained by repeated ultrasonication 1x 15, 3x15, and 5x15 minutes, frequency 24 kHz, and using alcohol 96%. The encapsulation process was carried out with three variable ratios of the amount of chitosan: Na-TPP added to 10 mL of Moringa leaf extract solution (F0), namely 5:1 (F1), 2:1 (F2), and 1:1 (F3). Test results for flavonoids as quercetin using a UV-Vis spectrophotometer showed that the Quercetin content in Moringa leaf extract ultrasonicated 5x15 minutes was 12.146%, the characterization of the Particle Size Analyzer (PSA) showed encapsulated particle sizes of 170.3 and 209.7 nm with polydisperse index <0 .5, the antioxidant activity test using the DPPH method showed that F0 was 61.4% and F2 had the highest antioxidant activity, namely 81.2%. Analysis of the morphology of nanoparticles using Scanning Electron Microscopy (SEM) showed that the particles were spherically distributed evenly. Nanoencapsulation of Moringa leaf extract has resulted and an increase in the antioxidant activity of Moringa leaf extract after encapsulation using Chitosan-NaTPP, from 61.4% to 81.2% (F2).

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