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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
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Articles 35 Documents
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Search results for , issue "Vol 5 No 1 (2021): Journal of Science and Applicative Technology June Chapter" : 35 Documents clear
Kajian Sistem Aktivitas pada Ruang Terbuka Publik Tepi Pantai Baron, Gunungkidul Elisabet Nungky Septania; Ahmad Sarwadi; Dyah Titisari Widyastuti
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.v5i1.405

Abstract

Baron Beach is a public space that becomes an icon of Gunungkidul Regency. The conditions of a waterfront that have a river and surrounded by hills also the presence of fishing activities attract visitors. Various kinds of activities that occur in this public open space at the same time with different interests, can cause conflicts between activities even though there are also activities that are in line with each other. This research uses a qualitative descriptive method that compares data to utilized public open space during the research period with existing theories. As the unit of analysis are actors who use public open space and the physical conditions of open space. The purpose of this research is to identify activity patterns in utilizing public open space, so that they can be taken into consideration in planning and designing the Public Open Space of Baron Waterfront.
Sedimentary Facies of Seblat Formation Semaka Districts, Lampung, Indonesia Evan Rosyadi Ogara
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.v5i1.401

Abstract

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.
Identification of Alkaloid Compounds from Cytotoxic Active Fraction in Peperomia pellucida M Alvien Ghifari; Enny Fachriyah; Khairul Anam; Dian Nopitasari; Kautsar Elvira; Rama Esa Perdana
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.v5i1.394

Abstract

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.
Perencanaan Geometri Jalan Rel Trase Bakauheni – Sidomulyo Wanda Nurwanda Sari; Muhammad Abi Berkah Nadi; Akhmad Musalim Ridho
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.v5i1.407

Abstract

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.
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.
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.
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.
Potensi Geodiversity di Sekitar Kawasan Anak Krakatau-Way Kambas, Provinsi Lampung, Sebagai Kandidat Geopark Indonesia Happy Christin Natalia; Danni Gathot Harbowo; Rinaldi Ikhram
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.v5i1.318

Abstract

The global significance of Krakatau Volcanic Complex and Way Kambas National Park is the best potential areas to be developed as part of a world heritage, particularly as UNESCO Global Geopark. Both of these objects are in the Lampung Province, Indonesia. Soon, it is necessary to identify and make an inventory of key sites that could become the theme of the area. The study of geodiversity and scientific valuation was carried out which referred to the Technical Guidelines for the Assessment of Indonesia Geological Heritage Resources, 2019. Based on these studies and assessments, there are 14 key sites to represent for Geopark Krakatau-Way Kambas themes. These sites are closely related to the evolution of tectonic activity in the Southern Sumatera as well as the dynamics of magmatism and paleovolcanism that have occurred since the Mesozoic which has signification in human history as world heritage.

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