Journal of Science and Application Technology (JSAT - Institut Teknologi Sumatera)
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APLIKASI INVERSI MODEL BASED DAN STOKASTIK UNTUK MEMETAKAN PERSEBARAN RESERVOIR BATUPASIR
Get PDFLapangan “M†terletak di Cekungan Sumatra Selatan. Target reservoir berada pada Talang Akar Formation (TAF) yang merupakan reservoir batupasir dengan lapisan keseluruhannya adalah perselingan antara batupasir dan shale serta sisipan batubara. Lapisan batupasir pada TAF memiliki ketebalan yang tipis sekitar 13.5 m dan berada di bawah tuning thicknes. Pada penelitian ini penulis mengaplikasikan metode inversi seismik deterministik dan stokastik untuk mengatasi lapisan tipis. Metoda inversi deterministik model based dijadikan model awal/ soft constraint dalam inversi stokastik. Inversi model based menghasilkan hasil yang sesuai dengan data sumur, namun hasilnya masih cenderung smooth dan blocky sehingga belum mampu meresolusi lapisan tipis dengan baik. Inversi seismik stokastik diaplikasikan untuk mengatasi kekurangan yang ada pada inversi seismik deterministik khususnya pada kasus lapisan tipis. Dari realisasi-realisasi model impedansi hasil inversi stokastik yang telah dihasilkan, penulis membuat suatu model probabilitas pada selang impedansi tertentu, dalam hal ini ialah selang impedansi batupasir sehingga penyebaran dari batupasir dapat terlihat. Model probabilitas dari 30 realisasi inversi stokastik dengan parameter P-Impedance dapat memetakan persebaran reservoir batupasir di lapangan “M†dengan cukup baik. Peta probabilitas batupasir maksimum berada pada bagian utara daerah penelitian.
 
IDENTIFIKASI DEKSAMETASON DALAM JAMU PEGAL LINU SEDIAAN SERBUK YANG BEREDAR DI PASAR-PASAR KOTA BANDAR LAMPUNG SECARA KROMATOGRAFI LAPIS TIPIS
Get PDFA total of 26.6% of the population in Lampung Province consume traditional medicine, one of which is Jamu Pegal Linu. However, a large public interest in herbal products is often misused by herbal manufacturers that it is possible to add BKO (Medicinal Chemicals), such as dexamethasone.The purpose of this study is to identify the presence or absence of dexamethasone in the preparation of Jamu Pegal Linu. The samples are taken from the store and depot herbs contained in the Markets of Bandar Lampung, acquired three different brands. The method used is Thin Layer Chromatography using dikloretan motion: diethyl ether: methanol: water (77:15: 8: 1,2) as a mobile phase which are non-polar, and silica gel GF 254nm as a stationary phase. The result showed that the detection of three samples of Jamu Pegal Linu contained staining purple and the difference of Rf sample with reference standard on the first repetition is 0.46, 0.44, 0.47, and on the second repetition is 0.45, 0.45 and 0.48, which are ≥ 0.05. It can be concluded that the sample of Jamu Pegal Linu in Bandar Lampung 0% containing dexamethasone
Evaluation of Pedestrian's Profile, Activity, and Environment in the City of Kitakyushu, Japan
Get PDFVarious attributes addressing the issues on walking environment and walking condition possibly has distracted the efforts of creating better planning and development to promote walking to the citizen. It will take an enormous effort and time for them to consider all the attributes that are available. Therefore authors assess the possibilities of the utilization of the Pedestrian PL.AC.E. (Profile, Activity, and Environment) and its key-attributes using a survey questionnaire in order to confirm that it can serve as a framework for urban planning or assessment in promoting a walking-friendly environment. The questionnaire was distributed to the case study area which is the city of Kitakyushu, Japan. After collecting and documenting all responses, the results were analyzed using descriptive type of statistical analysis with SPSS software
A SUBJECTIVE WELL-BEING EVALUATION OF PUBLIC TRANSPORT USERS DURING TRAVEL AND ACTIVITIES: APPLICATION OF DAY RECONSTRUCTION METHOD (DRM) CONCEPT: Case Study: Bandar Lampung City
No full textThe question regarding daily travel and activities implication to individuals’ well-being was heavily debated from past decades. This research is motivated by relationship between travel, activity, and well-being, specifically for public transport users. The modification of day reconstruction method applied in data collection to capture the changes of personal preference during travel and activities. The one day travel activities survey questionnaire distributed to public transport user in Bandar Lampung. Furthermore, 420 samples distribute based on sampling criteria which the result of survey evaluated based on completeness and variance. Key findings of this study are in line with the past study of well-being yet found some crucial findings. It is found that subjective well-being preference is changes during period of time when moving from activity to another activity. Furthermore, this papers also found that majority of individuals have negative experience on their daily travel
Pembuatan sediaan beads alginat dengan metode gelasi ion yang dapat mengapung di lambung: Pembuatan sediaan beads alginat dengan metode gelasi ion yang dapat mengapung di lambung
No full textConventional 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
A Studi Awal Potensi Energi Surya Wilayah Lampung
No full textEnergy surya yang merupakan salah satu sumber energy terbarukan yang dapat dijadikan sebagai alternatif yang fleksibel digunakan untuk penyediaan listrik di Indonesia. Daerah Lampung memiliki potensi energi surya rata-rata 4,43 kWh/m2/hari dengan variasi bulanan sekitar 7 persen. Lampung juga dinyatakan cocok untuk aplikasi teknologi energi surya fotovoltaik karena memiliki karakteristik komponen radiasi langsung yang lebih dominan daripada komponen radiasi baurnya. Institut Teknologi Sumatra (ITERA) dalam perkembangannya sangat membutuhkan peningkatan pasokan energi listrik setiap tahunnya. Sehingga perlu lirikan akan energi lain sebagai dukungan dalam mewujudkan forest kampus dan pemenuhan energi. Untuk mengetahui potensi energy surya di lingkungan ITERA, maka dilakukanlah study awal energy surya yang dapat diproduksi. Tujuannya adalah agar didapat informasi potensi yang real untuk perkiraan pengembangan energy surya di lingkungan Institut. Pengukuran potensi ini menggunakan rangkaian panel surya yang disambung ke beban Resistor dan lampu yang diatur maksimum. Kemudian dihitung nilai Daya yang didapat dari pengukuran arus dan tegangannya. Dari hasil pengukuran diperoleh bahwa intensitas sinar matahari tinggi terjadi pada pukul 09.00-15.00 dengan daya luaran mencapai 109W
UJI POTENSI Bacillus sp. DAN Escherichia coli DALAM MENGHASILKAN INDOLE ACETIC ACID (IAA) TANPA MENGGUNAKAN TRIPTOFAN PADA MEDIA PERTUMBUHAN
Get PDFIndole 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
PENGGUNAAN METODE FINITE DIFFERENCE TIME DOMAIN (FDTD) DALAM SIMULASI PHASED ARRAY ANTENNA
Get PDFFinite 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
PERBANDINGAN TOTAL RENDEMEN DAN SKRINING ANTIBAKTERI EKSTRAK ETANOL DAUN SIRIH HIJAU (Piper betle L.) SECARA MIKRODILUSI
Get PDFThe 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, microdilutio
PEMBANGUNAN SISTEM PAKAR UNTUK DIAGNOSIS PENYAKIT TULANG DAN SENDI
Get PDFAbstract—In Indonesia the numbers of orthopaedic surgeons are still not able to cover all demand. Badan Pusat Statistik (2015) reported that there are merely two orthopaedic surgeons in Lampung province having to serve about 8.117.268 people. Meanwhile, based on Ministry of Health of Republic of Indonesia, the ideal ratio between doctor and people is 12.2 doctor for each 100.000 people. Besides that, sometimes the surgeons need to serve more than one medical facility. Consequently, the patients might feel unpleasant. The lack of human resources becomes the main reason for developing expert system for diagnosing orthopaedic diseases. The expert system is able to diagnose orthopaedic diseases as well as fracture, dislocation, osteoarthritis and osteoporosis. The system is developed by using forward chaining methodology. This methodology is suitable for identifying a disease based on their symptoms. The result shows that the expert can answer 45 % of questions by identifying 6 main symptoms without continuing to following symptom questions.