cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Tim Editor Journal of Science and Applicative Technology
Contact Email
journal@itera.ac.id
Phone
+62721-8030189
Journal Mail Official
journal@itera.ac.id
Editorial Address
Lembaga Penelitian dan Pengabdian Masyarakat, ITERA Gedung D, Institut Teknologi Sumatera, Jalan Terusan Ryacudu Street, Way Hui Jati Agung Lampung Selatan 35365
Location
Kab. lampung selatan,
Lampung
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 22 Documents
 1   2   3 
Search results for , issue "Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter" : 22 Documents clear
Optimasi Multi Respon pada Proses End-Milling Glass Fiber Reinforced Polymer (GFRP) Dengan Menggunakan Metode Back Propagation Neural Network – Particle Swarm Optimization (BPNN-PSO) Fajar Perdana Nurullah; Abdul Muhyi; Devia Gahana Cindi Alfian
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.v5i2.447

Abstract

The use of composite materials continues to show an increasing trend in various fields such as sports, aviation and the military. This also increases the need for knowledge about the manufacturing process of composites. One of the most widely used composite materials is glass fiber reinforced polymer (GFRP). In the process of making components made from GFRP, one of the processes that is often used is end-milling. The studies that have been carried out on the GFRP end-milling process mostly use woven fibers, while research on machining of GFRP using combo fibers has not been widely conducted. This research was conducted to determine the effect of spindle speed, feeding speed, and cutting depth, on cutting forces, surface roughness, and delamination. In addition, multi response optimization is carried out using the combined method of BPNN-PSO to obtain the most optimal combination of machining parameters. The results shows that the optimal level of cut depth, spindle speed, and feeding speed are 1 mm, 4871 rpm and 788 mm / minute, respectively.
Distribution Strategies Analysis Using AHP and TOPSIS: A Distribution Company Case’s Study in Special Region of Yogyakarta, Indonesia Teny Sylvia; Noveliska Br Sembiring; Nadia Ulfiyati
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.v5i2.364

Abstract

The selection of distribution strategy is important for the company in order for the product to be delivered to the customer in time and according to the required quality and quantity. This research aims to analyze and determine the company's distribution strategy using the AHP and TOPSIS methods. The results of the calculations with AHP indicate that the distributor reliability is seen from the history and experience (0268), effective fund management (0159), and the financial structure of the distributor (0147) are three criteria with the weight of interest highest. The geographical strategy is a strategy that has the highest value so it is recommended to be the main strategy of the company in distributing products to customers.
Peningkatan Kinerja Microgrid Bangunan Kampus dengan Simulasi Multi Skenario dan Analisis Sensitivitas Justin Pradipta; Koko Friansa; Irsyad Nashirul Haq; Edi Leksono; Hanafi Kusumayudha; Salsabila Regita; Mediya Wasesa
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.v5i2.458

Abstract

Penelitian ini mengevaluasi kinerja microgrid cerdas dengan tujuan untuk meningkatkan ketersediaan pasokan listrik dan renewable fraction (RF). Evaluasi dilakukan dengan simulasi multi skenario yang mencakup produksi dan konsumsi energi. Simulasi dibagi tiga, yaitu skenario dasar, skenario uji, dan skenario rekomendasi. Skenario uji terdiri dari uji kapasitas sistem, penggantian komponen, dan analisis sensitivitas. Didapatkan dari skenario dasar bahwa ketersediaan pasokan listrik selama setahun telah terpenuhi, dengan RF 30,5%; cost of energy (CoE) Rp2.019/kWh; dan waktu otonomi baterai (WOB) 11,1 jam. Dari hasil analisis didapatkan beberapa rekomendasi berupa penggantian komponen baterai dan modul surya, penambahan kapasitas baterai, dan pengaturan batas state of charge (SoC) pada baterai untuk meningkatkan RF. Skenario rekomendasi tersebut berhasil meningkatkan ketersediaan pasokan listrik dan mencapai target dengan nilai WOB sebesar 37 jam dan RF sebesar 46,4% pada awal siklus hidup proyek; serta WOB sebesar 25,5 jam dan RF sebesar 29,1% pada akhir tahun ke 25, dengan CoE sebesar Rp6.448/kWh. Analisis sensitivitas operasi baterai lead-acid menunjukkan bahwa untuk mendapatkan RF maksimal rentang pengaturan SoC berada pada 0-20%. Sedangkan untuk baterai Li-Ion, rentang SoC adalah 0-25%.
Non-linear Geostatistics Approach for An Integrated Surface Mapping in Epithermal Gold Deposit, Lampung Linda Permata
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.v5i2.444

Abstract

A conventional surface mapping is calculated by any means of linear interpolator such as nearest neighborhood point (NNP), inverse distance (IDW)/inverse distance square (IDS), polygon, contour weighing, Ordinary Kriging (OK). The latter is included in geostatistic methods and provides more advanced weighing method that differs from the rest. Although OK provides smoothing over mapping data but it does not cover categorial (non-value) data. Besides, it is not best in strongly skewed data that are common in exploration data and is limited to the expected value at some location. On the other hand, a non-linear interpolator is conducted to estimate the conditional expectation at a location, that not only to simply predict the grade or other parameter itself, but also the probability of the parameter at a location with known nearby samples. An integrated surface mapping should have many kinds of data that can be categorized into continous data (grade, thickness, elevation, etc.) and categorial data (lithology, alteration, structural data, etc.). In order to create a block that consist of all data available in a given deposit, a non-linier transformation will be conducted to estimate values at determined thresholds by Kriging methods – known as Indicator Kriging method and its variants.
Heat transfer through building envelope materials and their effect on indoor air temperatures in tropics Wenny Arminda; Maqbul Kamaruddin
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.v5i2.630

Abstract

High thermal mass modern building materials are unsuitable to be used in the tropics due to their thermos-physical properties and the ability in absorbing solar radiation, storing and transferring heat into the building, affecting the high indoor air temperature, hence, reducing thermal comfort. However, due to the high demand for building, utilization of this material is avoidable. This study investigated the heat transfer through building envelope materials and their effect on the indoor air temperature of the building through field measurement using a thermal camera and a handle wind meter. The results found that the ceiling is the part of the building which gained the highest indoor surface temperature which reaches 38.6 °C at the apex point at 2pm but decreased significantly to 30.4 °C at 6 pm. Meanwhile, the inner of the northeast wall gained 33.1 °C at the peak temperature and stayed above 30 °C until 10 pm. The indoor air temperature of this unit housing was 36.3 °C at 2 pm with the temperature difference between outdoor and indoor was 2.5 °C. At night, the indoor air temperature was 3.8 °C higher than the outside temperature.
Eco-Pedal Bicycle Prototype Design as An Alternative Multi-Information Display Energy Generator Sefrani Isdarmayani Siregar; Syamsyarief Baqaruzi; Rachmad Hidayatullah
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.v5i2.376

Abstract

As technology grows, so does the consumption of energy, especially electricity. Today, electricity has become the most used energy worldwide and the demand keeps on increasing every year. According to PLN annual report the highest electricity consumption came from domestic sector which peak up to 97.832,28 GWh in 2018. Sadly, our current power supplies are not enough to fulfill those demands. It was the main reason to develop another form of cheaper, more efficient, and environmentally friendly power plants. This research aims to build a simple system which able to generate electricity for bicycle and to determine the voltage and the current it generates with certain speed which can be stored in portable batteries in order to meet the campus power demand. This design uses propulsion from the bicycle and using a 16.8 volt 6600 mAh Lithium-ion battery as its energy storage. The tests show that MID LCD may update and notify the changes of voltage, temperature, speed in every second. The average power released is 13 Watt with maximum output can reach 34 Watt. The test shows that the average voltage error is 0.79% while average temperature error is 1.28% and average speed error is 2.77%.
Perancangan dan Simulasi Antena Mikrostrip MIMO 4×4 Rectangular Patch dengan Double U-Slot dan DGS pada Frekuensi 26 GHz untuk Aplikasi 5G Mohammad Anthoni; Rheyuniarto Sahlendar Asthan; Anita Pascawati; Dick Maryopi; Muhammad Reza Kahar Aziz
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.v5i2.336

Abstract

Abstract: This paper proposes a microstrip antenna for fifth Generation (5G) technology with a carrier frequency of 26 GHz. Furthermore, the antenna is designed with double U-slots added to a rectangular patch using Defected Ground Structure (DGS) to increase the bandwidth and reduce mutual coupling. It is expected that the antenna has a directional radiation pattern and a linear polarization. For the feeding of the patch, the proximity coupled feed line method is used. The proximity coupled feed line is placed on a different substrate layer with the radiating element. The advantage of this feeding method is that it can increase the impedance bandwidth. The substrate material used is RT Duroid 5880, which is chosen because it can produce more oversized dimensions, work at high frequencies, and have a small material permittivity. The simulation results showed that the highest impedance bandwidth value is 1.6564 GHz, the mutual coupling value has a limit below -20 dB, and the gain value is 7,1151 GHz. Keywords: MilimeterWave, MIMO, double U-Slot, Defected Ground Structure, 5G Abstrak: Artikel ini mengusulkan antena mikrostrip untuk teknologi generasi ke-5 (5G) dengan frekuensi carrier 26 GHz. Antena dirancang dengan tambahan double U-slot pada bagian patch-nya serta menggunakan metode Defected Ground Structure (DGS) untuk meningkatkan bandwidth dan mengurangi efek mutual coupling. Antena yang dirancang memiliki pola radiasi directional dan berpolarisasi secara linier. Untuk catuan ke patch, digunakan metode proximity coupled. Pencatu proximity di tempatkan pada lapisan substrat yang berbeda dengan elemen peradiasi. Kelebihan dari metode pencatuan ini adalah dapat meningkatkan bandwidth impedansi. Bahan substrat yang digunakan adalah RT Duroid 5880, bahan ini dipilih karena mampu digunakan untuk menghasilkan bentuk dimensi yang lebih besar dan dapat bekerja di frekuensi tinggi serta memiliki permitivitas bahan yang kecil. Hasil simulasi menunjukkan bahwa 1) nilai bandwidth impedansi tertinggi sebesar 1,6564 GHz, 2) nilai mutual coupling memiliki batas di bawah -20 dB, dan 3) nilai gain sebesar 7,1151 dB. Kata Kunci: milimeterWave, MIMO, double U-Slot, Defected Ground Structure, 5G
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 (% ).
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.
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.

Page 1 of 3 | Total Record : 22

 1   2   3 

Filter by Year

2021 2021


Reset
Filter By Issues
All Issue Vol. 9 No. 1 (2025): Journal of Science and Applicative Technology June Chapter Vol. 8 No. 2 (2024): Journal of Science and Applicative Technology December Chapter Vol. 8 No. 1 (2024): Journal of Science and Applicative Technology June Chapter Vol 7 No 2 (2023): Journal of Science and Applicative Technology December Chapter Vol 7 No 1 (2023): Journal of Science and Applicative Technology June Chapter Vol 6 No 2 (2022): Journal of Science and Applicative Technology December Chapter Vol 6 No 1 (2022): Journal of Science and Applicative Technology June Chapter Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter Vol 5 No 1 (2021): Journal of Science and Applicative Technology June Chapter Vol 4 No 2 (2020): Journal of Science and Applicative Technology December Chapter Vol 4 No 1 (2020): Journal of Science and Applicative Technology June Chapter Vol 3 No 2 (2019): Journal of Science and Applicative Technology December Chapter Vol 3 No 1 (2019): Journal of Science and Applicative Technology August Chapter Vol 2 No 1 (2019): ICoSITeR Special Edition Vol 2 No 2 (2018): Journal of Science and Applicative Technology December Chapter Vol 2 No 1 (2018): Journal of Science and Applicative Technology June Chapter Vol 1 No 1 (2018): ICoSITeR Special Edition Vol 1 No 2 (2017): Journal of Science and Applicative Technology December Chapter Vol 1 No 1 (2017): Journal of Science and Applicative Technology August Chapter More Issue