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INDONESIA
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 223 Documents
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Evaluasi Pemanfaatan Ruang Kabupaten Lampung Selatan Tahun 2012-2017 Zulqadri Ansar
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.v5i1.403

Abstract

Land use in South Lampung Regency continues to experience development, which is influenced by rapid population growth within five years after the planning year began in 2010. Various types of land-use changes that have occurred in South Lampung Regency indicate in the spatial changes of South Lampung Regency, which has been planned especially in the Regional Spatial Plan (RTRW) of South Lampung Regency for 2011-2031, one of which is the plantation area (belonging to PTPN VII) to become land for ITERA. There are preventive measures that can be made so that the spatial plan can still be following its development objectives. It is necessary to research by evaluating South Lampung Regency's spatial use based on its spatial plan, especially by RTRW. Based on the analysis, there is a deviation of land use in South Lampung Regency with 48.46%, which is divided into spatial structure plans and spatial pattern plans.
Surface Wettability and Colour Change of Betung Bamboo Strands Treated with 1% NaOH under Various Immersing Times Rio Ardiansyah Murda; Sena Maulana; Silvia Uthari Nuzaverra Mayang Mangurai; Fajar Aditya Julyatmojo; Astri Aulia Suwanda; Muhammad Saeful Fadlan
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.v6i1.914

Abstract

Bamboo was a material with enormous potential to be used as raw material for various purposes. This material has good properties for structural purposes such as buildings and furniture or converted to a composite product such as bamboo oriented strand board (BOSB). This study was aimed to determine the wettability properties and the colour change of Dendrocalamus asper bamboo strands after alkali immersing treatment with 1% NaOH solution. The treatments were carried out for 1, 2, and 3 hours, respectively. The wettability of surfaces is quantified by computing the value of the K parameter or the contact angle change rate constant. Meanwhile, the colour change parameter of bamboo strands was quantified by portable colour difference meter CDX – 105 to determine the brightness intensity of a combination of red–green and blue-yellow. The results show that the wettability properties of bamboo strands were getting better after the treatments. On the other hand, the bamboo strands' colour was darker due to the alkali immersion treatment. The optimum duration of alkali immersing treatment with 1% NaOH was 2 hours.
Karakterisasi reservoir menggunakan metode Seismik Inversi Acoustic Impedance (AI) dan Seismik Multiatribut dengan Probabilistic Neural Network (PNN) pada lapangan Blok F3, North Sea Netherland Muhammad Intasya Falie Rizqi; Ruhul Firdaus
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.v5i2.274

Abstract

A 3D seismic acquisition has been carried out for oil and gas exploration in F3 field block of North Sea sector of the Netherland formed between the Jurassic and Cretaceous periods. The presence of hydrocarbons is indicated by the phenomenon of bright spots and gas chimneys below the surface. The data used are 3D post stack time migration seismic data and four wells with well log, checkshot and marker data availability. This study uses two methods in determining reservoir zones, namely the acoustic impedance inversion method and the multi-attribute method with PNN. Both methods integrate seismic data with well data. AI inversion method is used to predict the physical properties of rocks, namely their acoustic impedance values. The multi-attribute method is used to predict well log properties from seismic data. Non-linear multi-attribute transformation is obtained by the process of training neural networks with a type of probabilistic neural network (PNN). In this research, acoustic impedance volume and porosity estimation volume will be made to identify the hydrocarbon reservoir prospect zone. The two methods are then applied to the Netherlands F3 seismic field data, and the results show that there are three sandstone reservoir zones that have an acoustic impedance range between 4100-4800 (m/s)*(gr/cc) and porosity range between 29-35 (% ).
Young Adult Perception of Fermented Durian (Tempoyak) in Lampung Province, Indonesia Lasuardi Permana; Hesti Ayuningtyas Pangastuti; Amalia Wahyuningtyas
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.v5i1.392

Abstract

Tempoyak is fermented food made from durian (Durio zibethinus) pulp. This product is popular traditional food in Indonesia and Malaysia. To ensure the current position of tempoyak and its dishes in young generation, this research was conducted to obtain young adult perception about tempoyak as traditional food in Lampung, and also discover about its potential for innovation. Method for investigate the response of young adults to tempoyak as traditional food was using direct questionnaire survey through google form. A total of 115 respondents have participated in the survey, consisted of 43 men and 72 women. The result showed that all of the respondent were familiar with tempoyak, but only three-quarter of them had ever taste of its products. Half of the respondent were preferred intermediate acidity level of tempoyak, and the rest of them preferred tempoyak with low acidity level and sweet taste. More than 95% of respondents agreed that tempoyak needs innovation to be better known in public. The innovation needed were product form (55%), packaging innovation (21%), instant product innovation (18%), others (5%), and marketing strategy (1%).
Evaluation of surface properties of betung bamboo (Dendrocalmus asper) strands under various heat treatment duration and temperature Risa Nurin Baiti; Sena Maulana; Wahyu Solafide Sipahutar; Rio Ardiansyah Murda; Fajar Aditya Julyatmojo; Astri Aulia Suwanda; Muhammad Saeful Fadlan
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.v5i2.457

Abstract

The abundance, rapid growth characteristics and good mechanical properties have made betung bamboo as good alternative materials to replace the slow growing wood. To adress the susceptibility to insects and water attack, the making of bamboo composites, using resin as matrix, has been widely practiced. Thus, the surface properties of bamboo strands are crucial to determine the optimum interaction with resin. This study evaluate the effect of heat treatment to improve the surface properties of bamboo strands, such as the wettability and the color change. Beforehand, the freshly cut bamboo was cut, cleaned and sand-grinded. The heat treatment was done at 140o and 160oC for 1, 2, and 3 hours. After cooling down to room temperature, the contact angle of bamboo’s surface was measured by sessile drop methode. The wettability was indicated by constant of contact angle change rate, K. Besides, the change of color was also determined. After the experiments, it was obtained that the bamboo surface tends to be more hydrophobic and has darker color with longer duration of heat treatment. Higher temperature and longer duration of heat treatment can cause more evaporation of liquid inside bamboo and decrease hydrophilicity of the surface.
Pengaruh Jarak Antar Drain Hole Terhadap Penurunan Muka Air Tanah pada Lereng Tambang Terbuka Batubara Rahmat Fadhilah; Lilik Eko Widodo; Irwan Iskandar
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.v4i2.369

Abstract

The presence of groundwater on the slopes of the mine, which means that the slopes are saturated with water, will cause a decrease in slope stability. Drain hole is a method that can be applied to decrease groundwater level on a mine slope. This research was conducted to determine the effect of horizontal distance between drain holes on the mine slope on the decrease in groundwater level (groundwater drawdown). Groundwater flow simulation on the slopes of an open pit coal mine with 3 scenarios, without drain holes, 100 m horizontal space between drain holes, and 50 m horizontal space between drain holes, was carried out to answer the goal of this research. The results obtained from the simulation, the third scenario with a distance between drain holes of 50 m has the maximum result compared to the other two scenarios, which are the percentage of groundwater drawdown of 54.1% and groundwater discharge of 167.3 L/s. So it can be concluded that the denser the horizontal distance between the drain holes on the mine slope, the higher the groundwater drawdown on the slope.
Electrospun Nanofiber Poly (3,4-ethylenedioxytriophene): poly (styrene sulfonate) / poly (vinyl alcohol) as Strain Sensor Application Chotimah Chotimah; Aditya Rianjanu; Bimo Winardianto; Misbachul Munir; Indriana Kartini; Kuwat Triyana
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.v5i2.390

Abstract

A strain sensor based on poly (3,4-ethylenedioxytriophene): poly (styrene sulfonate)/poly (vinyl alcohol) (PEDOT: PSS/PVA) nanofiber has been successfully fabricated by electrospinning technique. Patterned copper wires were deposited on the mica flexible substrate with the distance of 1 mm. The sensor then characterized with various strain by one side bending. The conductivity of as-spun nanofiber mats can be adjusted from 0.03 to 1.2 µS cm-1 with various concentration of PVA and depends on its structure and its nanofiber diameter. The sensing mechanism of nanofiber-based strain sensor is due to the common piezoelectric effect of PEDOT:PSS polymer and unique nanostructure of nanofiber mats. When the sensor stretched, the length of nanofiber increase affecting the geometrical change and lead the increasing in resistance. This sensor shows good repeatability with gauge factor of 17. The performance of PEDOT:PSS/PVA nanofiber based strain sensor make nanofiber mats as promising alternative materials for strain sensor application.
Deteksi Golongan Senyawa Ekstrak Kasar Metabolit Ekstrasel Mikroalga Laut Spirulina sp. Sebagai Agen Antioksidan Yulistia Anggraini; Diah Astika Winahyu
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.v5i1.415

Abstract

Microalgae excrete antioxidant compounds as a defense system to protect themselves from the danger of ultraviolet rays. These compounds also can be used as the organic materials of cosmetics or medicines. This study aimed to determine the antioxidant activity of marine microalgal extracellular metabolite extract of Spirulina sp.. Extracellular metabolites were extracted from the residual media filtrate from the harvesting. The qualitative antioxidant test’s results using the thin-layer chromatography technique and 2,2-diphenylpycrilhydrazil (DPPH) reagent showed antioxidant activity. Moreover, the component identification using ninhydrin and Dragendorff reagent in thin layer chromatography test showed alkaloid and peptide compounds. To support the results, the identification using infrared spectrum analysis showed the peaks at 1117 cm-1 (C-N and C-C stretching), 1458 cm-1 (C-H bending of methyl group), 1635 cm-1 (C=O stretching of amide group), and 3454 cm-1 (N-H stretching of amine and amide groups).
Karakteristik Pertumbuhan Penduduk Perdesaan pada Perkembangan Wilayah Peri-urban di Perbatasan Kota Surakarta Nela Agustin Kurnianingsih; Mentari Pratami; Marsista Buana Putri
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.v5i1.420

Abstract

Pertumbuhan sifat peri-urban pada wilayah pinggiran kota sudah banyak bermunculan. Kebutuhan lahan yang semakin tinggi nyatanya tidak sebanding dengan ketersediaan lahan di kota. Tingginya harga lahan juga menjadi pemicu masyarakat untuk memilih bermukim di kawasan pinggiran. Kawasan pinggiran kota yang sejatinya adalah desa, memiliki fungsi di bidang pertanian dengan mayoritas penggunaan lahan pertanian. Akibat fenomena perubahan lahan inilah, yang disinyalir akan memicu perubahan karakteristik perdesaannya, salah satunya adalah pertumbuhan penduduk. Aktivitas yang semakin heterogen di wilayah pinggiran akan meningkatkan angka pertumbuhan penduduk. Hal inilah yang dianggap mungkin terjadi di kecamatan-kecamatan Kabupaten Sukoharjo yang berbatasan dengan Kota Surakarta. Oleh karena itu, penelitian ini dilakukan untuk mencari tingkat pertumbuhan penduduk wilayah peri-urban di perbatasan Kota Surakarta dengan memanfaatkan teknik analisis statistik deskriptif. Teknik analisis ini dilakukan dengan cara pembobotan dan klasifikasi data pada unit amatan tingkat desa, dengan 2 perbandingan waktu data tahun 2010 dan tahun 2020. Dan hasil dari analisis yang telah dilakukan pada desa-desa di Kecamatan Kartasura, Kecamatan Baki, Kecamatan Grogol dan Kecamatan Mojolaban diketahui bahwa mayoritas pertumbuhan penduduk yang berada pada tingkat tinggi adalah di Kecamatan Kartasura, sedangkan kecamatan lain hanya menunjukan pertumbuhan di tingkat sedang hingga rendah.
PEMODELAN PENGINDERAAN JAUH UNTUK ESTIMASI SIMPANAN KARBON DI BLOK 1 PT ALAM BUKIT TIGAPULUH Arief Firmansyah; Hamzah Hamzah; Eva Achmad
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.v6i2.964

Abstract

Biomass calculations are useful for knowing the amount of carbon stored in a forest ecosystem and essential steps to mitigate global warming and climate change. Restoration activities at PT Alam Bukit Tigapuluh (PT ABT) have indirectly made efforts to absorb carbon dioxide (CO2). This study aimed to analyze and measure carbon storage as well a model and map carbon storage at PT ABT. The method used the survey method of species, diameter at breast height, and vegetation height with a plot size of 20mx20m. The research conducted to analyze carbon storage and build a regression model. The results showed that the average carbon storage of the 30 plots was 259.32 tons/ha and the estimated carbon storage is 5,496,233 tC. The best regression model’s modelling result are Y = -817 + 331.5 MSRVI with the correlation of determination being 76.40%. The distribution of carbon storage in PT ABT is divided into 5 classes, namely, non-vegetated class (<0 tons/ha) of 57 ha, low (0-112.55 tons/ha) of 291 ha, medium (112.55-225.11 tons/ha) covering an area of ​​2,059 ha, high (225.11-337.67 tons/ha) covering an area of ​​18,533 ha and very high (>337.67 tons/ha) covering an area of ​​1,256 ha.

Page 14 of 23 | Total Record : 223

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