Journal of Science and Applicative Technology
ISSN : -     EISSN : 25810545
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 August 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.
Articles 78 Documents
PERBANDINGAN TOTAL RENDEMEN DAN SKRINING ANTIBAKTERI EKSTRAK ETANOL DAUN SIRIH HIJAU (Piper betle L.) SECARA MIKRODILUSI vifta, rissa laila
Journal of Science and Applicative Technology Vol 1 No 2 (2017): Journal of Science and Applicative Technology December Chapter
Publisher : Institut Teknologi Sumatera

Show Abstract | Original Source | Check in Google Scholar | Full PDF (571.812 KB) | DOI: 10.35472/281450

Abstract

The optimization of extraction procces for Sirih Hijau leaves (Piper betle L.) have been attempted. The aim of the research was to knowing the influence and the ratio of total yield on two different methods, that was using maceration and reflux method and followed by microbial antibacterial by microdilution test to show the qualitative value of MIC percentage of Sirih Hijau leaves extract against Escherichia coli and Staphylococcus aureus bacteria. The analysis was conducted descriptively for subsequent use as a basis to determined MIC percentage quantitatively. The result of extraction with two methods showed that the highest yield was yielded in reflux process with 18.5% rendement value with the weight ratio of 1: 5 to the maceration process. Phytochemical screening shows the ethanol extract of Sirih Hijau leaves contains flavonoid, saponins, and tannins compounds that have activated as antibacterial. The results of microbial antibacterial testing showed MIC percentage in Staphylococcus aureus at 5% and Eschericia coli at 3%. The test results indicate that Sirih HIjau leaves (Piper betle L.) have potential as an antibacterial candidate.   Keyword : Sirih Hijau, reflux, maceration, antibacterial, microdilution
KAJIAN NUMERIK STRUKTUR RANGKA TERBREIS EKSENTRIK DENGAN LINK YANG DAPAT DIGANTI Wirawan, Nugraha Bintang
Journal of Science and Applicative Technology Vol 1 No 1 (2017): Journal of Science and Applicative Technology August Chapter
Publisher : Institut Teknologi Sumatera

Show Abstract | Original Source | Check in Google Scholar | Full PDF (978.787 KB) | DOI: 10.35472/281452

Abstract

Rangka Terbreis Eksentris (RTE) merupakan sistem bangunan tahan gempa yang mempunyai keunggulan dari segi kekuatan dan kekakuan serta mempunyai daktilitas dan kemampuan energi disipasi yang baik dalam kondisi inelastis. Link adalah elemen penting yang berfungsi untuk mendisipasikan energi gempa melalui perilaku inelastis struktur. Kinerja link geser berupa kekuatan, kekakuan, daktilitas dan disipasi energi tergantung pada profil penampang yang digunakan pada link. Kajian ini bertujuan untuk mengetahui perilaku struktur RTE dengan link menggunakan sambungan baut yang menggunakan variasi mutu baja serta pelebaran ujung pelat sayap (Side Extended Plate/SEP) dan tanpa SEP. Analisis dilakukan dengan menggunakan menggunakan software MSC PATRAN/NASTRAN. Sebanyak 8 (delapan) variasi model link dikaji untuk menentukan kinerja struktur yang paling optimum ketika dilakukan pembebanan statik monotonik dan siklik dengan kontrol perpindahan. Hasil menunjukkan bahwa variasi mutu baja link pada pelat sayap dan pelat badan dapat meningkatkan kekuatan, kekakuan, dan daktilitas struktur secara signifikan dibandingkan dengan penggunaan SEP.    Kata kunci :      Rangka Terbreis Eksentis (RTE), link geser, link sambungan baut dan las, variasi mutu baja, pelebaran pelat sayap
Pembuatan sediaan beads alginat dengan metode gelasi ion yang dapat mengapung di lambung Adliani, Nur
Journal of Science and Applicative Technology Vol 1 No 1 (2017): Journal of Science and Applicative Technology August Chapter
Publisher : Institut Teknologi Sumatera

Show Abstract | Original Source | Check in Google Scholar | Full PDF (980.227 KB) | DOI: 10.35472/281469

Abstract

Conventional drug delivery systems have a shorter residence time in the stomach that causes less optimal drug absorption, the presence of food in the stomach also affects the absorption of the drug in the gastrointestinal tract so that it takes a drug that can stay and last longer in the stomach without being affected by the emptying process Stomach. In this study beads preparations are made that can stay and float so that lasts longer in the stomach. Alginate-containing beads are formulated by gelation method in which the alginate solution is dropped into a calcium chloride solution to form beads. The effects of oil type and alginate on morphological forms and buoyancy characteristics have been optimized. Beads containing alginate and paraffin can float on a gastric medium simulation for 240 minutes. The presence of paraffins can maintain the integrity and release of alginate beads during contact with the gastric medium. The SEM results describe the paraffin forming globules on the entire surface of the beads. Beads also show the ability to be able to float depending on the concentration of paraffin used.
SIMPLE ESTIMATION AIR TEMPERATURE FROM MODIS LST IN GIFU CITY, JAPAN Rahmat, Ali
Journal of Science and Applicative Technology Vol 1 No 1 (2017): Journal of Science and Applicative Technology August Chapter
Publisher : Institut Teknologi Sumatera

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1009.19 KB) | DOI: 10.35472/281480

Abstract

In the developing country or poor country difficult to access meteorological data such as air temperature, it's caused by the limitation of equipment or funding. Air temperature is one of the meteorological data commonly used to predict evaporation or to understanding climatic condition in a specific location. Nowadays from satellite data can estimate some meteorological data. But the detail of explanations about how to get and how to use satellite data is limited and difficult to adopt for beginners. This paper explains how to get MODIS LST data to estimate air temperature data study case in Gifu City, Japan. The results show data from MODIS LST is higher than data from the local meteorological station for day time and lower for night time, but still can use because the pattern is similar. Mean of maximum air temperature and minimum air temperature can be used as daily average air temperature. MOD11A2 product data was better than MYD11A2 data to predict air temperature. MODIS LST data can be used for untouched areas like desert or forest.
COMMUNITY BASED TOURISM PERUBAHAN PERILAKU EKONOMI MASYARAKAT SEBAGAI DAMPAK PENGEMBANGAN PARIWISATA ALAM PERDESAAN : STUDI KASUS PEMANDU WISATA AIR TERJUN NYARAI KECAMATAN LUBUK ALUNG, PROVINSI SUMATERA BARAT Rahman, Yudha Yudha
Journal of Science and Applicative Technology Vol 1 No 1 (2017): Journal of Science and Applicative Technology August Chapter
Publisher : Institut Teknologi Sumatera

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1689.217 KB) | DOI: 10.35472/281419

Abstract

Special Interest Tourism is an alternative for experiency tourist attraction based on particular motivation and interest of the travelers different from attractions. The problem that has been persisty is that the local community of Gamaran Salibutan Village cutting trees and damaging nature in Gamaran Protected Forest which carry out potential and natural tourist attractions. This study analyze the change of society’s economic behaviour as an effect of rural nature tourism development. The method used Qualitative research with  case study approach. The analysis showed that the presence of  tourism development of Nyarai Waterfall has  positive benefits for the economy of the local community, namely the increase of people's income and their job opportunities as a tour guide for woodcutter the unemployed youth and the women are able to open a stall so that possibly in adding to  the family income.
PENGGUNAAN METODE FINITE DIFFERENCE TIME DOMAIN (FDTD) DALAM SIMULASI PHASED ARRAY ANTENNA Yudistira, Hadi Teguh
Journal of Science and Applicative Technology Vol 1 No 1 (2017): Journal of Science and Applicative Technology August Chapter
Publisher : Institut Teknologi Sumatera

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1570.98 KB) | DOI: 10.35472/281436

Abstract

Finite Diffrence Time Domain merupakan metode simulasi yang digunakan dalam simulasi gelombang elektromagnetik dimana mengunakan prinsip dasar pendekatan numerik dari persamaan differensial dalam domain ruang dan waktu. Phased array antenna merupakan salah satu jenis antenna yang dapat diaplikasikan pada automotive radar. Phased array antenna yang disimulasikan terdiri dari microstrip antenna dengan jumlah 64 antenna ( 8 baris, 8 kolom). Microstrip antenna terdiri dari 3 bagian yaitu patch, substrate dan ground. Ukuran patch pada microstrip antenna adalah 1.2 x 2.6 mm. Permitivitas relatif substrate yang digunakan adalah 10.2. Hasil yang diperoleh dari simulasi ini adalah pola radiasi dari phased array antenna berbentuk directional.
UJI POTENSI Bacillus sp. DAN Escherichia coli DALAM MENGHASILKAN INDOLE ACETIC ACID (IAA) TANPA MENGGUNAKAN TRIPTOFAN PADA MEDIA PERTUMBUHAN Asril, Muhammad
Journal of Science and Applicative Technology Vol 1 No 2 (2017): Journal of Science and Applicative Technology December Chapter
Publisher : Institut Teknologi Sumatera

Show Abstract | Original Source | Check in Google Scholar | Full PDF (188.789 KB) | DOI: 10.35472/281434

Abstract

Indole Acetic Acid (IAA) is the important phytohormone for boosting plant-growth promotion. It is related with amino acid tryptophan as a precursor for building IAA. However some bacteria such as Bacillus sp. and Escherichia coli enable to produce IAA without L-tryptophan on culture medium via the tryptophan independent pathways. This study aims to determine the potential of indigenous Bacillus sp. and E. coli isolate in producing IAA via Trp-independent pathways (without L- tryptophan). The stage of this study consists of growing of isolate on liquid media without tryptophan and measuring the levels of IAA using Salkowsky method. Bacillus sp and Escherichia coli could produce IAA with the concentration of 0,0236 mmol/L and 0,024 mmol/L, respectively. The concentration of IAA produced by these bacteria is quite low because of their ability to synthesis IAA from the independent tryptophan pathway. The independent tryptophan pathway means these bacteria could synthesize IAA without using tryptophan as a precursor on their growth medium.
ANALISA ALGORITMA RELIEFF UNTUK MODEL ASOSIASI PERUBAHAN WARNA PADA INDIKATOR KEMASAN CERDAS DAN PERUBAHAN MUTU PRODUK Thamrin, Elfa Susanti
Journal of Science and Applicative Technology Vol 2 No 1 (2018): Journal of Science and Applicative Technology June Chapter
Publisher : Institut Teknologi Sumatera

Show Abstract | Original Source | Check in Google Scholar | Full PDF (397.001 KB) | DOI: 10.35472/281435

Abstract

Smart packaging is one of innovations in the field of packaging that can monitor and provide information to producers and consumers about the quality of the packaged product. Nowadays, there is no exact model to relate both of the changing between the label and the product quality. Thus, it is required an association between discoloration smart packaging indicator with the packaged product quality change. Parameter identification process can generate a lot of parameters, we need a method to select the important parameter attributes therefore it used a ReliefF (Reliable Eliminated of Feature) method. The objectives of this research were to identify the association parameters and to select the important attribute and sufficiently describing the relationship and furthermore this research was to develop an association model of discoloration of smart packaging indicator with natural dyes and the quality changes. The data were obtained from a previous research and discretization to classify the data °Hue, ΔE, consumer preferences and the total colony to nominal value. Selection of attributes by using the ReliefF method showed that there were three attributes with the highest weight value (Wi). Furthermore, this research generated important parameters and sufficiently describing the relationship of discoloration and product quality changes.
Analysis Wind Characteristics in South Lampung Indonesia Prahmana, Rico Aditia
Journal of Science and Applicative Technology Vol 2 No 1 (2018): Journal of Science and Applicative Technology June Chapter
Publisher : Institut Teknologi Sumatera

Show Abstract | Original Source | Check in Google Scholar | Full PDF (540.35 KB) | DOI: 10.35472/281439

Abstract

Many researchers have begun to evaluate the characteristics of the wind to be the mainstay of energy utilized for power generation. Various countries have started to conduct research of analysis the characteristics of wind potential in certain areas. In this study, wind speed data is be measured in the South Lampung. The maximum and minimum wind speed average in one day is 4.2 knot (from east to west direction) and 0.9 knot (from west to east direction), respectively. The sensor of wid speed is located at 10 meter height from ground. The results show that the maximum wind speed can reach 3 m/s at a height of 10 m on August and December. Moreover, the most wind direction during July to December goes to WSW (West SouthernWest) and SSE (South SouthernEast).
KARAKTERISKTIK BACKSCATTER CITRA ALOS PALSAR POLARISASI HH DAN HV TERHADAP PARAMETER BIOFISIK HUTAN DI SEBAGIAN TAMAN NASIONAL KERINCI SEBLAT Simarmata, nirmawana
Journal of Science and Applicative Technology Vol 1 No 2 (2017): Journal of Science and Applicative Technology December Chapter
Publisher : Institut Teknologi Sumatera

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1026.9 KB) | DOI: 10.35472/281441

Abstract

Synthetic Aperture Radar (SAR) is one kind of an active remote sensing system, utilizing microwave to records the earth surface. One of the SAR’s satellites is ALOS PALSAR which is capable of penetrating clouds so that the underlying objects can be identified. ALOS PALSAR has a polarization system operating with single beam polarization (HH or HV), dual polarization (HH + HV or VV + VH) and full polarization (HH + HV + VH + VV). This study aims to use the backscatter value of ALOS PALSAR's image for monitoring and mapping the forest. The Utilization of ALOS PALSAR imagery to measure forest biophysical parameters and saturation levels identified based on backscatter sensitivity. Image extraction is done through image calibration where the digital value is converted to sigma naught backscatter value then the result of calibration unit is changed to decibels. Backscatter sensitivity depends on forest structure which  can affect scattering mechanism. The backscatter value is also influenced by humidity and weather dynamics which can also affect the dielectric constant. The result of accurate classification of land use polarization fall in HH accuracy of 62,4%. Whereas for HV polarization accuracy obtained equal to 74,88%.