Journal of Science and Applicative Technology
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
Articles
223 Documents
<![CDATA[Semi-Empirical Estimation of Velocity Profile for Shallow Gravel Bed Channel ]]>
<![CDATA[Rahma Yanda]]>;
<![CDATA[Morihiro Harada]]>;
<![CDATA[Ichiro Tamagawa]]>
<![CDATA[ Journal of Science and Applicative Technology Vol 6 No 2 (2022): Journal of Science and Applicative Technology December Chapter ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia ]]>
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DOI: 10.35472/jsat.v6i2.885
<![CDATA[The dependence of flow velocity distribution near the bed on the roughness geometry has led to various approaches for estimating the velocity. Themodels proposed bypreviousstudies aremostlybased on segmented velocityprofiles(e.g., a linear distribution within theinterfacial sublayer and logarithmic distributions above the interfacial sublayer). By increasing number of segments, the possibility of errors in the parameters, as well as constants, are likely to rise. This study assessed the applicability of a hyperbolic tangent function velocity model to estimate double-averaged velocity profile for shallow flow over a rough gravel bed as a single model concept, especially for the area within roughness layer. Velocity profiles over gravel beds with different arrangements and roughness densities from previously published studies using laboratory measurements were used to validate this model. The behaviours of related constants for this model in response to changes in the flow depth and roughness geometry were investigated, and limitations on it application were evaluated. It was found that the constants required to apply hyperbolic tangent function are affected by roughness geometry function and relative submergence. Through this study also observed that HTF is reliable to describe the velocity profile for about twice of geometric roughness height.]]>
<![CDATA[Perancangan Bidai Infus Untuk Anak Usia Sekolah ]]>
<![CDATA[Putty Yunesti]]>;
<![CDATA[Andi Rahadiyan Wijaya]]>;
<![CDATA[I Gusti Bagus Budi Dharma]]>;
<![CDATA[Fajar Paundra]]>
<![CDATA[ Journal of Science and Applicative Technology Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia ]]>
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DOI: 10.35472/jsat.v5i2.451
<![CDATA[This research designed a hand infusion splint for school-age children with an age range of 7-12 years according to the anthropometry and contours of the child's hand so that children who underwent infusion on the hand did not experience medical complications during treatment or post-hospital trauma. The method used in the design of infusion splint for school-age children is Quality Function Deployment (QFD) and House of Quality (HOQ) to get design criteria according to consumer needs, while the software used, namely SPSS and Autodesk Professional Inventor to build models. The size of the infusion splint was determined based on the hand anthropometry of school-age children. The specifications of the hand infusion splint of school-age children according to the needs of pediatric patients have a length of 189 mm, a thickness of 9 mm, and a width of 46.3 mm for arm supports, and 37.1 mm for hand supports obtained from the highest priority value in the House of Quality, namely the design of the dimensions of the splint.]]>
<![CDATA[Sedimentary Facies of Seblat Formation Semaka Districts, Lampung, Indonesia ]]>
<![CDATA[Evan Rosyadi Ogara]]>
<![CDATA[ Journal of Science and Applicative Technology Vol 5 No 1 (2021): Journal of Science and Applicative Technology June Chapter ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia ]]>
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DOI: 10.35472/jsat.v5i1.401
<![CDATA[Seblat Formation had been exposed in Sedayu village, Lampung. Stratigraphic measurements and detailed description at several outcrops was performed on Seblat Formation. The facies of Seblat Formation base on sedimentological study can be divided into to two facies, classical turbidtes and slump. Classical turbidites in study area characterized by monotonous sandstone intercalated with mudstone and slump facies consist of mudstone and fine-grained sandstone with total thickness around 5 meters and the thickness of each layer ranges from 3-13 centimeters. Based on two sedimentary facies, mid fan (smooth-channelled) and inner fan is proposed for Seblat Formation.]]>
<![CDATA[Studi Dampak Penggunaan Insulasi pada Bangunan Rumah Tinggal Terhadap Konsumsi Energi Pendingin Ruangan ]]>
<![CDATA[Roy Candra P Sigalingging]]>
<![CDATA[ Journal of Science and Applicative Technology Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia ]]>
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DOI: 10.35472/jsat.v5i2.610
<![CDATA[The global warming issue has become a concern for environmentalists activists, including many governments. This concern is due to the increasing attention to reducing the use of fossil energy because fossil energy has significantly exacerbated global warming. To minimize the use of fossil energy, especially the housing sector that is one of the extensive energy users. Building performance's analysis is done by creating changes to the case study's building envelope material. Case study buildings were simulated in energy analysis software. Preliminary analysis shows how the performance of the case study building is still far from the standard of thermal comfort. Air conditioning (AC) usage in the room will give comfort in terms of temperature. But, even though with the AC, the humidity level of the room was still high. Two building models are then created in the software to see the performance of the building by making changes to the building envelope material. With the settings on air-conditioning (AC) and environmental conditions in both models, the results indicate differences in the building performance of the two buildings. The results show that the building with insulation are using less energy and can provide optimal comfort for building users. Comfort is not only in terms of the building's temperature but including building relative humidity. In buildings with insulation, the temperature and humidity of the building are relatively stable throughout the year.]]>
<![CDATA[The Implementation of Multilevel Colour Thresholding on a Prototype Coffee Machine ]]>
<![CDATA[Nova Resfita]]>;
<![CDATA[Rahmadi Kurnia]]>;
<![CDATA[Fitrilina Fitrilina]]>
<![CDATA[ Journal of Science and Applicative Technology Vol 4 No 2 (2020): Journal of Science and Applicative Technology December Chapter ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia ]]>
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DOI: 10.35472/jsat.v4i2.344
<![CDATA[The development of computer vision has expanded widely as there is a vast number of its applications in various aspects of daily life. One of its implementations is integrating the image processing technique on a prototype coffee machine based on the speech recognition system. This study aims to detect the requested coffee colour spoken by users which are black, middle and light. The sensor used in this research is a digital PC camera and the applied method is Multilevel Colour Thresholding. Of all experiments conducted, the image processing technique can work perfectly as the camera is able to identify the requested colour of the coffee solution. Furthermore, the system might be developed by improving the multilevel colour thresholding technique as well as advancing the hardware design in order to establish more robust coffee machine based on the requested colour.]]>
<![CDATA[Biostratigrafi Nanofosil Gampingan dan Lingkungan Pengendapan Formasi Ofu selama Neogen ]]>
<![CDATA[Rikza Nur Faqih An Nahar]]>;
<![CDATA[Angga Jati Widiatama]]>;
<![CDATA[Lauti Dwita Santy]]>;
<![CDATA[Winda Eka Mandiri Puteri]]>;
<![CDATA[Adrianus Damanik]]>;
<![CDATA[Zulfiah Zulfiah]]>;
<![CDATA[Rubiyanto Kapid]]>
<![CDATA[ Journal of Science and Applicative Technology Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia ]]>
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DOI: 10.35472/jsat.v5i2.383
<![CDATA[Formasi Ofu berumur Neogen-Kuarter tersingkap baik di bagian tengah Pulau Timor. Kumpulan nannofosil gampingan Formasi Ofu berumur Neogen terdiri tujuh famili dan 25 spesies. Nannofosil gampingan berumur Neogen didominasi genus Discoaster, Dictyococcites, dan Reticulofenestra sedangkan umur Kuarter didominasi oleh genus Gephyrocapsa. Nannofosil gampingan Neogen terdiri dari dua zonasi, dan satu zona Kuarter. Permulaan Miosen, Burdigalian-Tortonian (zona NN 4-NN 10) ditandai pemunculan awal Reticulofenestra pseudoumbilica hingga pemunculan awal Discoaster quinqueramus. Zona NN11 yang berumur Tortonian-Messinian ditandai pemunculan awal hingga pemunculan akhir Discoaster quinqueramus. Kuarter (Zona NN20) ditandai pemunculan awal Ponthospaera indooceanica.]]>
<![CDATA[Identification of Alkaloid Compounds from Cytotoxic Active Fraction in Peperomia pellucida ]]>
<![CDATA[M Alvien Ghifari]]>;
<![CDATA[Enny Fachriyah]]>;
<![CDATA[Khairul Anam]]>;
<![CDATA[Dian Nopitasari]]>;
<![CDATA[Kautsar Elvira]]>;
<![CDATA[Rama Esa Perdana]]>
<![CDATA[ Journal of Science and Applicative Technology Vol 5 No 1 (2021): Journal of Science and Applicative Technology June Chapter ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia ]]>
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DOI: 10.35472/jsat.v5i1.394
<![CDATA[Peperomia pellucida attracts a lot of interest due to its bioactivity and has been used in various folk medicine. In this report, n-hexane, dichloromethane, and ethyl acetate fraction of Peperomia pellucida extract were examined for its cytotoxic activity against Artemia salina larvae using the BSLT method. The ethyl acetate fraction showed higher cytotoxic activity than n-hexane and dichloromethane. The LC50 of ethyl acetate, n-hexane, and dichloromethane fractions was 39.665, 278.920, and 60.808 ppm, respectively. Mayer and Dragendorff tests give a positive result to the alkaloid constituent in ethyl acetate fraction. The alkaloids in Peperomia pellucida were extracted using ethyl acetate and further separated using chromatography techniques. Two alkaloid components were identified in ethyl acetate fraction from Peperomia pellucida as Piperine and Nigramide N by using LC-MS/MS.]]>
<![CDATA[Perencanaan Geometri Jalan Rel Trase Bakauheni – Sidomulyo ]]>
<![CDATA[Wanda Nurwanda Sari]]>;
<![CDATA[Muhammad Abi Berkah Nadi]]>;
<![CDATA[Akhmad Musalim Ridho]]>
<![CDATA[ Journal of Science and Applicative Technology Vol 5 No 1 (2021): Journal of Science and Applicative Technology June Chapter ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia ]]>
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DOI: 10.35472/jsat.v5i1.407
<![CDATA[Pelabuhan Bakauheni merupakan salah satu pelabuhan di Indonesia yang berlokasi di kecamatan Bakauheni, Kabupaten Lampung Selatan. Penggunaan transportasi berbasis jalan rel dirasakan sangat efektif dan efisien dalam melayani tingginya tuntutan kebutuhan pergerakan dikarenakan transportasi berbasis jalan rel memiliki kapasitas dan kecepatan yang lebih tinggi dibandingkan transportasi berbasis jalan raya. Penelitian ini dilakukan dengan tujuan mendesain geometri jalan rel Bakauheni-Sidomulyo dan mendesain drainase jalan rel. Geometri jalan rel didesain berdasarkan pada beban lintas yang merupakan turunan dari jumlah demand angkutan eksiting dan tipe kereta yang melintasinya dengan mempertimbangkan faktor keamanan, kenyamanan, ekonomi dan lingkungan. Pada perancangan jalan rel ini menggunakan jalan rel dengan kelas jalan I dengan double track dan lebar sepur 1435mm sepanjang 39,173 km. Jalan rel ini direncanakan dengan 7 lengkung horisontal (dengan jari-jari 1400m) yang menggunakan tipe lengkung Spiral Circle Spiral (SCS) dan 6 lengkung vertikal (dengan jari-jari minimum 15736,5 m). Struktur jalan rel ini terdiri dari rel R60, penambat elastic ganda, bantalan beton, tebal balas 30 cm dan sub balas 30 cm. Drainase samping di buat seragam dengan bentuk segi empat dengan dimensi lebar x tinggi yaitu 50 x 30 cm, tinggi jagaan 38,7 cm. Penampang gorong-gorong yang digunakan berbentuk lingkaran dengan diameter seragam sebesar 0,60m.]]>
<![CDATA[Pengembangan Pengontrol Tegangan Sistem Mikrogrid Cerdas Menggunakan Sistem Baterai Penyimpan Energi ]]>
<![CDATA[Putu Handre Kertha Utama]]>;
<![CDATA[Irsyad Nashirul Haq]]>;
<![CDATA[Edi Leksono]]>;
<![CDATA[Justin Pradipta]]>;
<![CDATA[M Daya Imannata]]>;
<![CDATA[Timothius Pratama Tjahja]]>
<![CDATA[ Journal of Science and Applicative Technology Vol 6 No 2 (2022): Journal of Science and Applicative Technology December Chapter ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia ]]>
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DOI: 10.35472/jsat.v6i2.594
<![CDATA[A power outage on a conventional grid can cut the electricity supply to the entire load. In contrast, Microgrid (MG) can still supply at least the most critical local loads even though blackout occurs in the main grid. MG can also utilize renewable energy sources such as solar and wind energy to generate electricity. That is possible by the advancement of the battery energy storage system (BESS). The BESS able to maintains electricity supply to the load even in outages. The inverter on the SBPE also plays a role in stabilizing the MG output voltage by supplying or absorbing reactive power in the MG system. This paper focuses on the control development of the battery inverter primary controller. The droop control design utilizes the deadband around the nominal voltage. That becomes the improvement of the droop control method used in this study compared to the initial formulation of the droop method. The proposed method was then tested through simulation with four different scenarios. The BESS will operate in the voltage range 194.9V to 234.6V with a droop control deadband in the voltage range 198.0V to 231.0V. Based on the simulation results, the addition of SBPE with the MG scheme on the existing system can improve the quality of the voltage received by the load from 0.994p.u. to 0.997p.u. The simulation also shows that the load still gets a power supply even though there is a blackout on the main grid.]]>
<![CDATA[Aplikasi Sistem Informasi Geografis untuk Kajian Perencanaan Rehabilitasi Hutan Mangrove di Kecamatan Punduh Pedada, Lampung ]]>
<![CDATA[Mohammad Ashari Dwiputra]]>;
<![CDATA[Adib Mustofa]]>;
<![CDATA[Budhi Agung Prasetyo]]>
<![CDATA[ Journal of Science and Applicative Technology Vol 4 No 2 (2020): Journal of Science and Applicative Technology December Chapter ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia ]]>
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DOI: 10.35472/jsat.v4i2.256
<![CDATA[Mangrove forests are one of the coastal ecosystems that are under pressure due to antrophogenic activities, including land conversions to fishponds or aquaculture. On the other hand, the needs for seafood products from these aquaculture activities tend to increase annually. These situations become paradoxes that are often encountered within aquaculture management in Indonesia. Punduh Pidada Subdistrict is one of the areas in Pesawaran Regency, Lampung, that severely suffered from mangrove forest conversion into fishponds. The purposes of this study were to identify the trends in mangrove cover changes over 30 years and to design a mangrove rehabilitation plan in Punduh Pidada Subdistrict. This study used a time-series data of Landsat satellite imagery over 30 years, from 1989 to 2019. The results showed a significant decrease in the mangrove cover areas over 30 years at 83.34 Ha with an average mangrove cover losses at 30.5%. Three zones that are suitable for mangrove rehabilitation plan was then choosen based on the levels of mangrove loss areas, namely first priority rehabilitation plan covering zone 1 (1.7 Ha) and zone 2 (1.5 ha) and the second priority rehabilitation plan covering zone 3 (7.5 Ha). With a planting distance of 1 x 2 meter, the total of seeds needed for the rehabilitation planning are 8,500 seeds for zone 1, 7,500 seeds for zone 2, and 27,500 seeds for zone 3.]]>
