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WIDEBAND MILLIMETER-WAVE SUBSTRATE INTEGRATED WAVEGUIDE (SIW) CAVITY-BACKED ANTENNA FOR SATELLITES COMMUNICATIONS AL-Fadhali, Najib Mohammed; Al-fadhali, Najib; Majid, Huda; Omar, Rosli; FAIZAL, MUHAMMAD; KAMAL, MOHAMAD; Omar, Abdul Rashid
Bulletin of Electrical Engineering and Informatics Vol 9, No 5: October 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v9i5.2238

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This paper presents a new type of wideband waveguide (SIW) cavity-backed patch antenna for Millimeter Wave (mmW). The antenna proposed applies to applications of 31-36 GHz Ka-band such as satellites communications. The SIW is intended with settings for particular slots. The simulated results show that the SIW antenna resonates across 31 to 36 GHz bands, which means that this new antenna covers all applications within this range. The reflection coefficients in targeting range are below 10 dB. The antenna achieves good efficiency and gain with 80% and 8.87dBi respectively
IDENTIFIKASI KARAKTER MORFOLOGI FASE GENERATIF PADI BERAS HITAM SENAKIN DAN BELIAH DI TANAH SAWAH faizal, muhammad; palupi, tantri; rianto, fadjar
Jurnal Sains Mahasiswa Pertanian Vol 6, No 2 (2017): Oktober 2017
Publisher : Jurnal Sains Mahasiswa Pertanian

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Abstract

Karakter morfologi padi lokal beras hitam varietas Senakin dan Beliah sangat diperlukan. Selain memberi identitas, mengumpulkan sifat-sifat unggul yang terdapat pada padi lokal beras hitam dapat dimanfaatkan sebagai program perbaikan varietas. Penelitian ini bertujuan untuk menentukan karakter morfologi fase generatif padi lokal beras hitam varietas Senakin danBeliah yang ditanam di tanah sawah. Penelitian dilaksanakan di kebun percobaan Fakultas Pertanian Universitas Tanjungpura Pontianak selama 67 hari,mulai 14 November 2016 sampai dengan 19 Januari 2017.Penelitian menggunakan pola rancangan acak lengkap (RAL), terdiri dari 2 (dua) perlakuan varietas, Senakin dan Beliah. Setiap perlakuan diulang 8 (delapan) kali, dan setiap ulangan terdiri dari 6 (enam) sampel tanaman. Variabel pengamatan ini adalah waktu berbunga, warna ujung gabah, ekor/bulu ujung gabah, keluarnya malai, tipe malai, tinggi tanaman, umur tanaman, jumlah malai per rumpun, persentase anakan produktif, jumlah gabah per malai, bobot 1000 butir, warna kulit ari berasdan pengamatan lingkungan. Hasil penelitian menunjukan bahwa karakter morfologi dari kedua varietas padi lokal beras hitam varietas Senakin dan Beliah ini memiliki kesamaan pada waktu berbunga, warna ujung gabah berwarna putih, ekor/bulu ujung gabah tergolong indica, tipe malai antara kompak dan sedang, tinggi tanaman, umur tanaman,persentase anakan produktif, dan jumlah gabah per malai. Karakter yang berbeda kedua varietas adalah keluarnya malai, jumlah malai per rumpun, bobot 1000 butir dan warna kulit ari beras. Kata kunci: Identifikasi karakter, fase generatif, padi lokal beras hitam varietas Senakin dan Beliah  
CFD Modeling Of Waste Heat Recovery On The Rotary Kiln System in the Cement Industry Novia, Novia; Faizal, Muhammad; Liana, Septa
Jurnal Ilmu Teknik Vol 1, No 1 (2013): Jurnal Ilmu Teknik
Publisher : Sriwijaya University

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Abstract

The cement production process is one of the most energy and cost intensive in the world. In order to produce clinker, a cement industry requires the substantial energy consumption. About 70% of energy consumption lies on the unit of rotary kiln system. The higher amount of energy consumption is due to the lack of work efficiency tools leading the waste heat. This reserach was focus on modeling of the waste heat recovery in the rotary kiln system using CFD. Analysis of mass and energy balance was used to determine the sources of heat loss from kiln system. The results showed that the distribustion of the input heat to the system is a good agreement with the output energy and gave the significant insights oft the reasons for the low overall system efficiency. The system efficiency is obtained of 53 %. The major heat loss sources have been determined as kiln exhaust (21.88% of total input), cooler exhaust to stack (9.62 % of total input) and heat loss astemated as heat from kiln surface (13.54 % of total input). The amount of heat energy can be absorbed by air amounted to 163,080 Kcal / hour and can be used as air for combustion of fuel. Based on data calculation, the amount of coal can be saved amounted to 738 kg / day.
Polystyrene Plastic Waste Conversion into Liquid Fuel with Catalytic Cracking Process Using Al2O3 as Catalyst Kholidah, Nurul; Faizal, Muhammad; Said, Muhammad
Science and Technology Indonesia Vol 3 No 1 (2018): January
Publisher : ARTS Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (406.334 KB) | DOI: 10.26554/sti.2018.3.1.1-6

Abstract

The increase in energy consumption and an increase in the plastic waste generation are two major problems that arise along with economic growth and the increase in population. Styrofoam is one type of polystyrene plastic waste that can be processed into liquid fuels by cracking process. In this study, the cracking process of polystyrene plastic waste into liquid fuel carried by the catalytic cracking process using Al2O3 as a catalyst. This study aimed to determine the effect of the catalyst weight, length of cracking time and range of temperature in the catalytic cracking process of polystyrene plastic waste into liquid fuel toward the mass and characteristics of liquid fuels produced and to determine the composition of liquid fuels produced. The catalytic cracking process of polystyrene plastic waste with catalyst was done in the fixed bed type reactor by heating the reactor with a heater, where the process took place at temperature of 150°C, 200°C, 250°C and 300°C and the length of the process was varied into 20, 40, and 60 minutes and the catalyst weight was also varied, which were 4%, 6% and 8%, while the styrofoam weight was 250 grams. From the research, the highest mass of liquid fuel derived from polystyrene catalytic cracking process was in the amount of 48.8 grams and liquid yield percentage of 19.5% at temperature of  250°C, cracking time of 60 minutes and weight of 8% catalyst, while the characteristics of liquid fuel that were approaching the characteristics of gasoline was at temperatures of 250°C, cracking time of 60 minutes and weight of 6% catalyst, in which each value of density of 0.763 g/ml, specific gravity of 0.778 and oAPI gravity of 50.2. While other liquid fuels obtained from the cracking of polystyrene were still within the tolerance range characteristic properties of gasoline. Liquid fuels produced from the catalytic cracking process was analyzed using a GC-MS, in which the analysis results indicated that liquid fuels were included in the gasoline fraction.
ANALYSIS OF A COMPARED TEMPERATURE USING CAPILLARY TUBE DIFFERENT MEASUREMENT LENGTH AT ROOM 3 X 4 M2 HELPING AC PORTABLE Wiseta, Rendy; Sipahutar, Riman; Faizal, Muhammad
Journal of Mechanical Science and Engineering Vol 2, No 2 (2015): Journal of Mechanical Science and Engineering
Publisher : Sriwijaya University

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Abstract

At this time along with the times a lot of problems that occur in this world like the Earth's warming temperatures globally . Human needs of the air conditioning apparatus has become a staple in our daily lives . There is also a saying that the Air Conditioner ( AC ) has become a mandatory item installed in homes without air conditioning because of the environment around the home became more sultry and hot when we were in the neighborhood . In developments at this time have many types of AC marketed like Split AC , AC Windows , Central air conditioning and so on . A capillary tube expansion device or lowering pressure so cheap that researchers sought to examine the ratio of capillary -sized 33 , 54 , and 76 cm to the temperature of an air conditioner Portable. Results comparative study of the capillary tube length obtained the lowest total heat value is 9086 , 6925 Btu / Hr and the highest is 15144.4875 Btu / Hr .
THE EFFECT OF FLUID FLOW CURRENT TO 30º BLADES ACHARD TURBINE PERFORMANCE Faizal, Muhammad; Tafrant, Dodi
Journal of Mechanical Science and Engineering Vol 3, No 1 (2016): Journal of Mechanical Science and Engineering
Publisher : Sriwijaya University

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Abstract

Achard turbine is one kind of vertical axis water turbine that can use to low head water current. Achard turbine can use to river flow or irrigation canal. This is will make an additional function of river and irrigation canal to be a renewable energy resource. The experiment use three blades NACA 0020 Achard turbine in the irrigation canal at Belitang District, West Ogan Komering Ulu. The flow current is 0.55 m/s, 0.61 m/s, and 0.71 m/s. The result shows increasing of CP and CT by increasing of flow current. Maximum CP is 0.1797 at flow current 0.71 m/s. Maximum CT is 0.206 at flow current 0.71 m/s.
The Effect of Retention Time and Initial Concentration of Ammonia on Biological Treatment for Reducing Ammonia Content in Wastewater Faizal, Muhammad
Sriwijaya International Seminar on Energy-Environmental Science and Technology Vol 1, No 1 (2014)
Publisher : Sriwijaya International Seminar on Energy-Environmental Science and Technology

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Abstract

As we know that, urea fertilizer Industry is one of important industries for supporting food consumption. But, in manufacturing process, this industry produces a wastewater containing ammonia. Before ammonia rejected to environment, it should be treated. Biological process at perforated plate with foam as attachment media and addition of ammonia degrading isolate is used as an alternative treatment with observing the effect of residence time and initial concentration of NH3-N on its pollutant degradation. From this research, biological process occur with residence time of 63 to 250 minutes and range of initial concentration from NH3-N 276 to 530 mg/L. The results are as follows: removal of ammonia of 20.92 – 56.52%, COD of 48.46 – 74.52 %, and TKN of 17.69 – 44.89 %.
EFEKTIVITAS FORUM MUSYAWARAH GURU MATA PELAJARAN (MGMP) GEOGRAFI TERHADAP PENINGKATAN KOMPETENSI PROFESIONAL GURU MATA PELAJARAN GEOGRAFI SMA NEGERI DI KOTA SEMARANG Faizal, Muhammad
Edu Geography Vol 3 No 6 (2015)
Publisher : Edu Geography

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Abstract

Penelitian ini bertujuan untukmengetahui tingkat efektivitasMGMP Geografi dalam meningkatkan kompetensi profesional guru mata pelajaran Geografi SMA Negeri Kota Semarang dan kendala-kendala yang menghambat MGMP Geografi dalam meningkatkan kompetensi profesional guru mata pelajaran Geografi SMA Negeri di Kota Semarang. Metode penelitian yang digunakan berupa pendekatan kuantitatif dengan analisis deskriptif.Hasil penelitian kompetensi profesional guru Geografi SMA Negeri Kota Semarang yang tergabung dalam MGMP Geografi SMA Kota Semarang yakni rata-rata persentase sebesar 79,46 % dan rata-rata skor sebesar 3 dengan hasil kriteria profesional.Kendala-kendala yang menghambat MGMP Geografi SMA Kota Semarang dalam meningkatkan kompetensi profesional guru Geografi SMA Negeri di Kota Semarang, yakni : kurangnya motivasi guru untuk meningkatkan kompetensi profesional, masalah waktu dan kesibukan rutinitas mengajar, keterbatasan media pembelajaran, dan perubahan kurikulum pendidikan. The purpose of this researchareto find out the effectiveness ofMGMPGeography in increasing professional competence of Geography teachers inState Senior High School of Semarang and the difficulties that prevent MGMPGeography in increasing professional competence of Geography teachers in State Senior High School of Semarang. The method that used in this research is a quantitative approach with a descriptive analysis. The results of this study of professional competence of Geography teachers in State Senior High School of Semarang who are member ofMGMP Geography of State Senior High School of Semarangare the average percentage is 79,46% and the average score is 3 with the result is professional criteria. The difficulties that prevent MGMP Geography in increasing professional competence of Geography teachers in State Senior High School of Semarangarethe lack of motivation of the Geography teachers to increase their professional competence, the matter of time and busy with teaching, the lack of teaching media, and the changing of curriculum.
Effects of Mesophilic and Thermophilic Temperature Condition to Biogas Production (Methane) from Palm Oil Mill Effluent (POME) with Cow Manures Fajar, Muhammad Fajar; Faizal, Muhammad; Novia, Novia
Science and Technology Indonesia Vol 3 No 1 (2018): January
Publisher : ARTS Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1852.88 KB) | DOI: 10.26554/sti.2018.3.1.19-25

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Biogas is an environmentally friendly renewable energy source. Biogas can be used using Palm Oil Mill Effluents (POME). However, the % yield of biogas productivity is still not optimum due to the low conversion. The biogas productivity can be optimized by adding methanogen bacteria which increase the methane production through the anaerobic fermentation process. This study aims to utilize cow manures as the source of methanogen bacteria in methane production from POME. Furthermore, this study specifically aims to obtain the optimum productivity condition of biogas production by the composition ratio of POME and cow manures to the amount of fermentation time at 35oC and 50oC for mesophilic and thermophilic bacteria, respectively. The ratio of POME and cow mature were A1 (100:0), A2 (80:20), A3 (70:30), A4 (60:40), and A5 (0:100). The highest yield of biogas production was A2 ratio using the thermophilic condition which showed 51.33% mol with the total solid decline of 73.43%, COD removal of 77.01%, and BOD removal of 70.02%. 
Air Quality Analysis of SO2, NO2 and CO in Palembang City Nofri, Shelly; Faizal, Muhammad; Mohadi, Risfidian
Indonesian Journal of Fundamental and Applied Chemistry Vol 2, No 3 (2017): October 2017
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i3.58

Abstract

Population activity which tends to centralized in certain area cause decrease in air quality due to exhaust gas from transportation vehicle. From 2011-2014, Palembang city transport growth 3-5% per year comprise of passenger transportation, buses, truck, motorcycle and special vehicle. The increase of vehicle in Palembang gave the city air pollution potential. Transportation is the main source of air pollution in big city with 70% contribution. Exhaust gas from transport activity consist of 60% CO and 15% incomplete combustion of hydrocarbon such as NOx and Sox. The aim of research is to analyzed air quality in Palembang city. Samples were taken and subject to analysis for SO2, NO2 and CO. Sample location were determined by using purposive sampling. Location was chosen by means of traffic density at least for one hour and took place at Charitas crossroads, Patal intersection, Mesjid Agung circle, Lemabang crossroad and Plaju intersection. Result of analysis showed SO2 level is at range 112-208 mg/Nm3/hour. NO2 level between 45-227 mg/Nm3/hour and CO at range 12.595-18.320 mg/Nm3/hour. All parameter of air quality obtained are below threshold value defined by government regulation (GR) on air quality No 41 year 1999.