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Journal : Komunikasi Fisika Indonesia

IDENTIFIKASI KUALITAS AIR BERDASARKAN SIFAT FISIK AIR SUNGAI SIAK PEKANBARU Syech, Riad; Emrinaldi, Tengku; Simbolon, Lundu F
Komunikasi Fisika Indonesia Vol 13, No 12 (2016)
Publisher : Komunikasi Fisika Indonesia

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Abstract

A study concerning the determination of the quality of river water and well water around the river Siak using the experimental method has been investigated. This research was conducted by measuring the electrical properties of water at a temperature of 20 ̊C. The type of water used were water streams, water dug wells and water wells drilled in obtaining seven points. Measurement of the electrical properties of water was done by using multitester associated with power suppy, the plate of Copper (Cu) and Zinc (Zn) as a conductor, and the glass beaker as a container for the sample. The measurement will show voltage and current values. Based on voltage and current values,theycan calculate the value of the electrical properties of each sample. Results of river water has a resistance value of 2255.46 Ω, resistivity of 213.14 Ωm, conductivity of 0.00530(Ωm)-1, and power of 3.81 x 10-5 W. The electrical properties of best water wells dug well is six with a resistance value of 3136.46 Ω, resistivity 296.39 Ωm, conductivity of 0.00345 (Ωm)-1, and power of 7.85 x 10-5 W. Based on the results, the value of the electrical properties of the best water is the average electrical properties of water well three (drilled wells) with a resistance value of 3538.61 Ω, the electrical resistivity value of 334.39 Ωm, the electrical conductivity value of 0.00341 (Ωm)-1, and electric power of 4,76x10-5W. The water is suitable for consumption having a resistivity of 3x103 Ω, and the electrical conductivity of (300 to 500) x10-6 (Ωm)-1. Based on the standard resistivity and electrical conductivity, the river and well water samples are unfit for human consumption because the values are still far from the exposure limits.
IDENTIFIKASI KUALITAS AIR BERDASARKAN SIFAT FISIK AIR SUNGAI SIAK PEKANBARU Syech, Riad; Emrinaldi, Tengku; Simbolon, Lundu F
Komunikasi Fisika Indonesia Vol 13, No 12 (2016)
Publisher : Universitas Riau

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Abstract

A study concerning the determination of the quality of river water and well water around the river Siak using the experimental method has been investigated. This research was conducted by measuring the electrical properties of water at a temperature of 20 ̊C. The type of water used were water streams, water dug wells and water wells drilled in obtaining seven points. Measurement of the electrical properties of water was done by using multitester associated with power suppy, the plate of Copper (Cu) and Zinc (Zn) as a conductor, and the glass beaker as a container for the sample. The measurement will show voltage and current values. Based on voltage and current values,theycan calculate the value of the electrical properties of each sample. Results of river water has a resistance value of 2255.46 Ω, resistivity of 213.14 Ωm, conductivity of 0.00530(Ωm)-1, and power of 3.81 x 10-5 W. The electrical properties of best water wells dug well is six with a resistance value of 3136.46 Ω, resistivity 296.39 Ωm, conductivity of 0.00345 (Ωm)-1, and power of 7.85 x 10-5 W. Based on the results, the value of the electrical properties of the best water is the average electrical properties of water well three (drilled wells) with a resistance value of 3538.61 Ω, the electrical resistivity value of 334.39 Ωm, the electrical conductivity value of 0.00341 (Ωm)-1, and electric power of 4,76x10-5W. The water is suitable for consumption having a resistivity of 3x103 Ω, and the electrical conductivity of (300 to 500) x10-6 (Ωm)-1. Based on the standard resistivity and electrical conductivity, the river and well water samples are unfit for human consumption because the values are still far from the exposure limits.
PENGARUH TEMPERATURTERHADAP RADIATIVE FORCING OZON (O3) PERMUKAAN DI GLOBAL ATMOSPHERE WEATHER (GAW) STATION BUKIT KOTO TABANG Emrinaldi, Tengku; Sugianto, Sugianto; Aryan, Defra Afriana
Komunikasi Fisika Indonesia Vol 14, No 1 (2017)
Publisher : Universitas Riau

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Abstract

The level radiative forcing of Ozon (O3) from 2009 to 2012 at the Global Atmosphere WeatherStation (GAW) Station Bukit Kototabang (Agam Regency, West Sumatra) has been analyzed usingIPCC (Intergovernmental Panel Climate Change) method. The results showed that the surface O3linearly proportional with surface O3 radiative forcing which mean if the radiative forcing measuredincrease, there will be increase in temperature at Bukit Kototabang. The radiative forcing surface O3calculated are 0,93 Wm-2 for 2009, 0,90 Wm-2 for 2010, 1,05 Wm-2 for 2011, and 1,03 Wm-2 for 2012.The temperature difference based on IPCC method are 0,40 K to 0,60 K from 2009 to 2012, whiletemperature difference measured by instrumen AWS (Automatic Weather Station) are 0,1 0C to 2,4 0C.The temperature difference measured by AWS that is influenced by radiative forcing surface O3 wasanalyzed using IBM SPSS Statistics software and coefficient 0,031 is obtained which shows a lowcorrelation about 3,1% at Bukit Kototabang. The results shows that there are some factors thatinfluece the surface O3 concentration toward earth surface temperature.
PEMBUATAN DETEKTOR FREKUENSI TUNGGAL BERBASIS PRINSIP EDDY CURRENT UNTUK PENGUKURAN KETEBALAN LOGAM NON MAGNETIK CU DAN AL Sidabukke, Santi T; Rini, Ari Sulistyo; Emrinaldi, Tengku; Umar, Lazuardi
Komunikasi Fisika Indonesia Vol 14, No 1 (2017)
Publisher : Universitas Riau

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Abstract

Metode-metode yang telah dilakukan dalam pengukuran ketebalan logam adalah metodemanual (jangka sorong) dan metode ultrasonic thickness. Kelemahan dari kedua metode iniyaitu data yang dihasilkan kurang akurat karena sulitnya proses pembacaan dan harga yangrelative mahal. Pengembangan teknologi di bidang sensor memungkinkan pembuatandetektor ketebalan logam yang dapat mengatasi kelemahan dari kedua metode tersebut yaitumenggunakan eddy current. Sensor eddy current dapat mengukur ketebalan lapisan logamnon magnetik melalui hubungan tegangan dengan variasi ketebalan dimana ketebalan yangdigunakan untuk Cu yaitu 0,4 mm, 1 mm, 1,5 mm, 2 mm, 4 mm, 4,2 mm, 5 mm, 5,1 mmsedangkan Al yang digunakan yaitu 0,25 mm, 0,4 mm, 0,5 mm, 0,6 mm, 1 mm, 1,2 mm, 1,5mm, 2 mm, 2,2 mm, 3 mm, 4 mm, 5 mm dengan frekuensi yang diperoleh 700 KHz, 1 MHzdan 1,33 MHz. Kurva tegangan vs ketebalan untuk alumunium dan tembaga memilikihubungan eksponensial. Jarak antara sensor dengan material non magnetik dijaga konstansebesar 2 mm.
SELISIH TEMPERATUR OZON PERMUKAAN BERDASARKAN METODE IPCC DAN INSTRUMEN AWS DI BUKIT KOTOTABANG Emrinaldi, Tengku; Sugianto, Sugianto; Ginting, Maksi
Komunikasi Fisika Indonesia Vol 14, No 2 (2017)
Publisher : Universitas Riau

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Abstract

The results showed that the surface O3 linearly proportional with surface O3 radiative forcingwhich mean if the radiative forcing measured increase, there will be increase in temperatureat Bukit Kototabang. The radiative forcing surface O3 calculated are 0,93 Wm-2 for 2009,0,90 Wm-2 for 2010, 1,05 Wm-2 for 2011, and 1,03 Wm-2 for 2012. The temperature differencebased on IPCC method are 0,40 K to 0,60 K from 2009 to 2012, while temperature differencemeasured by instrumen AWS (Automatic Weather Station) are 0,1 0C to 2,4 0C. Thetemperature difference measured by AWS that is influenced by radiative forcing surface O3was analyzed using IBM SPSS Statistics software and coefficient 0,031 is obtained whichshows a low correlation about 3,1% at Bukit Kototabang. The results shows that there aresome factors that influece the surface O3 concentration toward earth surface temperature.
PENENTUAN NILAI REGANGAN JEMBATAN SIAK I OLEH KENDARAANBERMOTOR MENGGUNAKAN FIBER BRAGG GRATING Emrinaldi, Tengku
Komunikasi Fisika Indonesia Vol 13, No 13 (2016)
Publisher : Universitas Riau

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Vibration-induced strain and natural frequency of Siak I Bridge were investigated in thisresearch. A Strain was calculated from laser power measured by powermeter. Natural frequency wascalculated using manual calculation with single-girder analysis. The research has been done at fivemeasurement points at Siak I Bridge. The five measurement points were 10 m, 87,5 m, 175 m, 265m, dan 287,5 m from the one point of the bridge in Senapelan Subdistrict. The car used to inducevibration was Xenia and the power measurement was conducted in predawn. The instruments used werelaser diode, Fiber Bragg Grating (λB = 1550 nm), and powermeter. The results showed that five measuringpoints almost experienced strain below 20με.