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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Prosiding Semnastek Jurnas Nasional Teknologi dan Sistem Informasi Proceeding SENDI_U ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika JURNAL NASIONAL TEKNIK ELEKTRO JOIV : International Journal on Informatics Visualization SISFO Indonesian Journal of Electrical Engineering and Computer Science Industrial Research Workshop and National Seminar Jurnal Rekayasa Kimia & Lingkungan Riset Informasi Kesehatan
Fajril Akbar
Andalas University
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Other

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Penentuan Konsentrasi Dan Volume Demulsifier Pada Proses Pengolahan Minyak Di CGS - 1 Pt. Chevron Pacific Indonesia Duri,Riau Pasaribu, Ade Susanto; Fadli, Ahmad; Akbar, Fajril
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Central Gathering Station (CGS - 1), a facility to process fluid that is pumped from the production wells in duri city. Fluid flowing into the CGS - 1 will be separated into water, oil and solids, then the fluid is heated using a heat exchanger so that the separation between oil and water is better, but the heat is not enough for separation because of the persistence of the emulsion. For that use a chemical called demulsifier that serves to solve the water in oil emulsion so that the quality of oil in accordance with its terms. Emulsion enormous influence in lowering the quality of the oil  .Proper demulsifier concentration and sampling were both very helpful to reach the expected quality of the oil . The study was conducted to determine the concentration and volume of demulsifier on oil processing in CGS-1 with demulsifier reinjection method with variations of volume 1,0 ml to 5,5 ml and the variation of concentration of 50% to 100%, with samples taken from the incoming fluid CGS-1 with Basic Sediment and water cut 92% . After the sample was separated obtained 20% of water cut, then conducted research with injecting demulsifier with some variation of the above and the most optimal results obtained by the injection of 5,0 ml with a concentration of 70% water cut can lose up to 0.9%  Keywords: emulsion, injection, demulsifier, water cut
PEMBANGUNAN SISTEM INFORMASI SEBARAN RUMAH TANGGA MISKIN KELURAHAN PUHUN TEMBOK BUKITTINGGI Fithriyyah, Ulfa; Akbar, Fajril; Suryamen, Haris
SISFO Vol 6 No 1 (2016)
Publisher : Department of Information Systems, Institut Teknologi Sepuluh Nopember

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Abstract

Kota Bukittinggi merupakan salah satu kota besar di Sumatera Barat dengan angka kemiskinan yang tinggi.Bukittinggi menempati urutan ke empat tertinggi Sumatera Barat dengan 4.96% dari jumlah penduduknya adalah penduduk miskin. Bukittinggi tercatat memiliki 2.694 rumah tangga miskin yang tersebar di 3 kecamatan dengan 24 kelurahan. Kelurahan Puhun Tembok menempati urutan ketiga tebanyak bagi rumah tangga miskin. 163 rumah tangga miskin yang ada tersebar pada wilayah yang memiliki luas kurang lebih 70,9 km2. Lokasi yang tersebar dan informasi setiap rumah tangga miskin yang tidak akurat mengakibatkan program pengentasaan kemiskinan menjadi tidak tepat sasaran. Oleh karena ini dibangunlah sistem informasi berdasarkan lokasi rumah tangga miskin Kelurahan Puhun Tembok yang berbasis web. Metode pengembangan perangkat lunak yang digunakan adalah metode waterfall. Aplikasi memiliki 7 kebutuhan fungsional, diantaranya pencarian rumah tangga miskin berdasarkan RW, bantuan yang diterima, pencarian rumah tangga miskin terdekat serta rute menuju rumah tangga miskin. Fungsional aplikasi diuji oleh 5 orang penguji. Hasil pengujian menunjukkan 7 kebutuhan fungsional yang dirancang telah dipenuhi oleh aplikasi.
Ubiquitous Sensor Networks: Efisiensi Sistem Kontrol Cairan Infus Pasien Rawat Inap RAHMADYA, BUDI; SISKA, MIRA; AKBAR, FAJRIL
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 5, No 2 (2017): ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v5i2.232

Abstract

ABSTRAKPenelitian ini membahas tentang sistem kontrol cairan infus pada pasien dengan memanfaatkan teknologi sensor networks dan mikrokontroler arduino uno.  Sensor yang digunakan adalah sensor Ultrasonik HC-SR04 yang difungsikan untuk mendeteksi sisa cairan infus. Data yang terbaca oleh sensor dikirimkan menggunakan jaringan nirkabel/wireless dari Transmitter (Tx) di ruang pasien ke Receiver (Rx) di ruang perawat dengan menggunakan modul wireless Xbee S2. Efisiensi dari sistem kontrol yang dibuat yaitu ketika sensor mendeteksi cairan infus mendekati batas habis cairan yang telah ditentukan maka motor yang berada pada selang infus akan berfungsi untuk menutup aliran cairan infus pada selang. Dari simulasi yang dilakukan, didapatkan hasil presentasi error ketinggian cairan infus sebesar 1.96% dan presentasi error volume cairan sebesar 2.16%. Performa dari modul wireless Xbee S2 juga di ujicoba dengan mengirimkan data dari Xbee end device ke Xbee coordinator dalam penelitian ini. Kata kunci: Infus, Sensor Networks, Sensor Ultrasonik HC-SR04, Xbee S2 dan Mikrokontroler Arduino Uno.ABSTRACTThis research discusses about intravenous fluids Control System on Patients, utilizing sensor network technology and Arduino Uno microcontroller. We used  HC-SR04 Ultrasonic sensors to detect the review time intravenous fluids. The sensors data is readable by transmitted using wireless network/wireless from Transmitter (Tx) in Patients Into Space Receiver (Rx) at nurse room with using XBee wireless device S2. The efficiency of the control system were made, namely when the sensor detects the approaching limits of intravenous fluids discharged liquid that has been determined then the motor that was on the infus line will serve to close the infusion fluid flow in the line. In our simulations we found, the findings obtained Presentation intravenous fluids altitude error is 1.96% and presentations volume Liquid error is 2.16%. The performance of network devices XBee S2 have been tried, wireless data from the XBee end devices coordinator in this research. Keywords: Infusion, Sensor Networks, HC-SR04 Ultrasonic Sensor, XBee S2 And Microcontroller Arduino Uno.  
Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Cangkang Telur Ayam Ras Melalui Proses Sol Gel Dengan Variasi Waktu Reaksi Dan Waktu Aging Audrya, Helsa; Azis, Yelmida; Akbar, Fajril
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Hydroxyapatite is a bioceramic widely used as bone and dental grafting, catalyst and adsorbent. Hydroxyapatite is a calcium phosphate compound that can be synthesized from natural sources having calcium content such as eggshells. Chicken eggshell is a waste has a 96.6% CaCO3 content. This study aims to synthesize hydroxyapatite through the formation of Precipitated Calcium Carbonate (PCC) from chicken eggshell. The research began with an eggshell calcination to form CaO which then made into PCC by carbonation method. PCC as a source of calcium was synthesized into hydroxyapatite using sol gel process varying reaction time (2; 3; 4 hours) and aging time (60; 65; 70 hours). The synthesized hydroxyapatite was analyzed by Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray (EDX) and Brunaur, Emmett and Teller (BET). The FTIR spectrums showed PO43- and OH- groups that indicate the forming of calcium phosphate compound. The XRD patterns showed the formation of hydroxyapatite compound from the 2θ angle corresponding to the data of ICDD 01-073-6113. Hydroxyapatite synthesized at 4 hours reaction time and 70 hours aging time gave the best results with hexagonal crystal structure, crystal size of 26.91 nm, surface area of 43.272 m2/g and Ca/P ratio of 1.7.Keywords: aging, carbonation, PCC, sol-gel method.
Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Cangkang Telur Itik Melalui Proses Sol-Gel Dengan Variasi Rasio Reaktan Ca/P Dan Waktu Aging Luckita, Gema Kesa; Azis, Yelmida; Akbar, Fajril
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Precipitated Calcium Carbonate (PCC) is a product of nature material that contain calcium carbonate, like duck eggshell. PCC producted by precipitation process with high purity. Hydroxyapatite (HAp) is a crystalline molecule composed of phosphorus and calcium with molecular formula is Ca10(PO4)6(OH)2. Hydroxyapatite is a bioceramic which is widely used as bone graft or teeth, catalyst, and adsorbent. This research aims to study the effect of reactant ratio of Ca/P and aging time on synthesized HAp and to find the best condition of reactant ratio of Ca/P and aging time of hydroxyapatite synthesis in this method. In this research, hydroxyapatite was done by sol-gel method through from PCC formation path from duck egg shell which has 99.6% content. The variations given in this research are the reactant ratio of Ca/P (1.67 and 1.77) and aging time ( 16, 20, 24, 28, and 32 hours). The synthesized hydroxyapatite was analyzed by Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy – Energy Dispersive X-Ray (SEM-EDX). The result showed that the reactant ratio of Ca/P and aging time has effects on the synthesized hydroxyapatite characteristics. The result of FTIR analysis shows that in each sample there are groups of PO43-, OH-, and CO3- which indicate that apatite compound has been formed. The XRD analysis results show that the synthesized hydroxyapatite has X-Ray pattern and the highest intensity peak at angle of 2θ which is very similar to the standard hydroxyapatite from ICDD data (International Centre of Diffraction Data). The optimum condition of reactant ratio of Ca/P and aging time was obtained at the reactant ratio of Ca/P 1.67 and aging time during 32 hours due to the X-Ray pattern and the highest intensity peak at angle of 2θ very similar to the standard hydroxyapatite and having the smallest diameter than other conditions which is 26.8909 nm. The result of SEM-EDX analysis show the hydroxyapatite morphology in the form of agglomerate with molar ratio of Ca/P 1.57 .Keywords : aging, hydroxyapatite, sol-gel method, PCC, synthesis.
Analisa Pengaruh Suhu Pada Sulfate Reducing Bacteria (SRB) Yang Menyebabkan Korosi Internal Di Pipa Minyak Chevron Duri Satria, Hengky Darma; Akbar, Fajril; Muria, Sri Rezeki
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Oil pipeline in PT. Chevron Pacific Indonesia has been periodically protected with scale inhibitor injection, scale remover, coating and pigging, however it was still found internal corrosion issues that caused by SRB (Sulfate Reducing Bacteria). In effort to control growth of SRB, the research was conducted to determine the correlation between temperature of crude oil to the growth of SRB population. Variations in crude oil samples from 20 production wells, which was the actual temperature directly measured in the field, then Bart Test was conducted in laboratory to measure SRB population in every day within 8 days. The results showed that SRB population was not found for crude oil sample from production well with temperature above 150°F, while with temperature under 150°F SRB population can be found in vary population. pH range of all samples was still stay in pH range for the SRB life.Key words: Bart Test, corrosion, crude oil, pipe, production well, SRB (Sulfate Reducing Bacteria).
Sintesa Zeolit 4A Dari Kaolin Menggunakan Proses Peleburan Dengan Variasi Perbandingan Volume Reaktan Putra, Ryan Prakarsa; Akbar, Fajril; Zultiniar, Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Zeolite 4A can be used as phosphate replacement for detergents synthesis. It can be synthesized from calcined kaolinite . The results of the kaolin analysis indicated that composition of silica in kaolin larger than alumina, there for in the process of zeolite 4A synthesis need additional of alumina compound. In this research examine the possibility of kaolin as the source of silica in zeolite 4A synthesis with variations in the volume of reactants ( 20:80 , 40:60 , 50:50 , 60:40 , 80:20 ). The reactant compound was synthesis by reaction of sodium silicate (kaolin remelting with sodium hydroxide) and sodium aluminate . Zeolite 4A was synthesis by stirring up the sodium silicate with sodium aluminate for 2 hours until white gel formed. Then synthesized at 80 ⁰C temperature for 8 hours. The result of the synthesis filtered and washed with distilled water until neutral pH, and then dried in oven at 120⁰ C temperature for 3 hours. The forming of zeolite characterized by infrared spectrophotometry and X-ray diffractometer. Maximal zeolite 4A synthesized was form the variation of sodium silicate and sodium aluminate ratio at 60:40 with 1.53 ratio. The comparison of diffractogram concluded that zeolit synthesis in this study was zeolite 4A..  Keywords : Infrared Spectroscopy , Kaolin ,X-Ray Diffraction , Zeolite 4A
Sintesis Hidroksiapatit Dari Kulit Kerang Darah Dengan Metode Hidrotermal Suhu Rendah Muhara, Ikhbal; Fadli, Ahmad; Akbar, Fajril
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Synthesis of hydroxyapatite from sea shells has been successfully done by the low temperature hydrothermal method. The purpose of research is to determine the effect oftemperature calcination and holding time on the hydroxyapatite properties. Firstly, sea shells were calcined at 1000°C for 24 hours for producing CaO. And then 55.63 grams of (NH4)2HPO4 was dissolved in 600 mL of distilled water and then 45.91 grams of CaO added into the solution until formed a slurry. Subsequently, the slurry was dried in an oven at 120°C for 15 hours. The drued slurry was crashed and calcined at temperature of 700°C, 800°C, 900°C, 1000°C and holding time of 0.5 hours, 1 hour, 1.5 hours and 2 hours. The results showed that the diameter of the crystal at the temperature calcinationof 700°C is 52.87 nm, while the diameter of the crystal at temperature of 800°C is 52.17 nm. The diameter of the crystal at temperature of 900°C and 1000°C are 51.32 and 50.09nm respectively. Functional groups of PO4 3- and OH are detected in the obtained hydroxyapatite.Keywords: Hydroxyapatite, Hydrothermal, Sea Shells and Crystal Diameter
PENGEMBANGAN APLIKASI INTERNET GIS KAWASAN 1000 RUMAH GADANG NAGARI KOTO BARU, SOLOK SELATAN, SUMATERA BARAT Afnarius, Surya; Akbar, Fajril; Hasanah, Zikriya; Ikhwan, Ikhwan; Putra, Hafid Yoza
Proceeding SENDI_U 2020: SEMINAR NASIONAL MULTI DISIPLIN ILMU DAN CALL FOR PAPERS
Publisher : Proceeding SENDI_U

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Abstract

Sumatera Barat adalah salah satu propinsi di Indonesia yang menjadi tujuan wisata karena keunikanbudayanya. Di daerah ini terdapat banyak bangunan adat bagonjong yang dinamai dengan rumah gadang. SatuNagari yang terletak di Kabupaten Solok Selatan bernama Koto Baru terdapat Kawasan 1000 Rumah Gadang.Kawasan ini mempunyai daya tarik wisata yang kuat, yaitu terdapat 138 rumah gadang yang berdiri sejak tahun1700-an. Namun kawasan ini kurang ramai dikunjungi oleh wisatawan. Karena kawasan ini belum mempunyaisistem informasi untuk mempromosikannya. Paper ini melaporkan pengembangan sistem informasi tersebut yangdinamai Aplikasi Internet GIS Kawasan 1000 Rumah Gadang. Aplikasi Internet GIS ini dikembangkan denganmenggunakan metode waterfall. Aplikasi ini diprogram menggunakan PHP dan Javascript, sedangkan tampilanuser interface dibangun menggunakan framework CSS Bootstrap. PostgreSQL/PostGIS adalah Database yangdigunakan. Peta dasar yang digunakan pada aplikasi ini adalah Google Maps. Hasil pengujian menunjukanbahwa luaran sesuai dengan apa yang diharapkan. Beberapa fitur utama dari aplikasi ini telah mampu digunakansebagai sarana promosi objek wisata “Kawasan 1000 Rumah Gadang” yang berada di Nagari Koto Baru.
Effect analysis of residual magnetism availability level on the success of voltage generation processes in self-excited induction generators Refdinal Nazir; Syafii Syafii; Andi Pawawoi; Fajril Akbar; Yudi Arfan
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 11, No 3: September 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (420.765 KB) | DOI: 10.11591/ijpeds.v11.i3.pp1211-1219

Abstract

The voltage generation process is a very crucial initial stage for the successful operation of the self-excited induction generator (SEIG). The availability of residual magnetism and the adequacy of excitation capacitor value are factors that determine the success of the voltage generation process on the SEIG. This paper analyzes the effect of the availability of residual magnetism on the rotor's magnetic core. With a simple approach, the terminal voltage on the SEIG can be solved through the intersection between the magnetization curve (Xm) and the excitation curve (Xce). The shape and equation of the magnetization curve will be affected by the availability of residual magnetism. The change in residual magnetism availability will cause a change in the intersection point between the magnetization curve (Xm) and the excitation curve (Xce), which will determine the value of voltage generated by the generator. In this study, Newton Rhapson's method with numerical iteration approach has been used to analyze the effect of changes in the availability of residual magnetism on the success of voltage generation on the SEIG. The analysis results have been shown that the availability of residual magnetism with residual voltage values below 1.04 Volt will cause the failure of the SEIG to generate the terminal voltage at its nominal value. Meanwhile, the availability of residual magnetism in SEIG with residual voltage values above 1.04 Volt, will succeed in generating terminal voltage at its nominal value. For SEIG used as the object of this study, the value of Eres = 1.04 Volt is a critical value of the availability of residual magnetism.
Co-Authors Ade Susanto Pasaribu Ahmad Fadli Alvi Dwi Wahyuni Andi Pawawoi Andi Pawowoi Anggia Okta Yorizka Audrya, Helsa Aulia Ayu Lukman Axel Doriza Budi Rahmadya Erma Gustini Fadjar Goembira Fiqi Arkan Shadiq Fithriyyah, Ulfa Hafid Yoza Putra Haris Suryamen, Haris Hasanah, Zikriya Hengky Darma Satria, Hengky Darma Husnil Kamil I Ketut Suada Ida Zahrina Ikhwan Ikhwan Ilham Aminuddin Iqbal Saputra Isra Wilna Lathifah Arief, Lathifah Lestari, Resti Ayu Luckita, Gema Kesa Mardaleni . Mella Andriani MIRA SISKA Muhara, Ikhbal Nefy Puteri Novani Netti . Putra, Hafid Yoza Rachmat Hidayanto Rafel Dinur Rahmatika Pratama Santi Refdinal Nazir Regia, Rinda Andhita Regia, Rinda Andhita Resti Ayu Lestari Ricky Akbar Ronal Chandra Gumara Ryan Prakarsa Putra Salma Hanifah Shadiq, Fiqi Arkan SISKA, MIRA Sri Rezeki Muria Surya Afnairus Surya Afnarius Syafii Syafii Wahid Fachrul Hafidz Wahyu Rizki Muslyadi Wahyudi Wardatul Alifah Yelmida Azis Yossi Prima Ariyani Yudhi Hartadi Yudi Arfan Yunita Era Refsi Zuheldi Zuheldi Zultiniar, Zultiniar