Sumariyah Sumariyah
Lab. Instrumentasi & Elektronika, Jurusan Fisika UNDIP

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REVIEW PROBABILITAS MENEMUKAN ELEKTRON DENGAN FUNGSI GELOMBANG SIMETRI DAN ANTISIMETRI PADA MOLEKUL Yusron, Moh.; Firdausi, K. Sofjan; Sumariyah, Sumariyah
BERKALA FISIKA Vol 10, No 1 (2007): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

The probability density of  and  for the symmetry and asymmetry wave function respectively, for  ion has been simulated. The  and  wave function have been obtained through the solutions of one dimensional time-independent Schrödinger equation.  The  and  are formed then by linear combination of individual solution of wave function of hydrogen atom. The probability density is calculated and simulated for several values of inter nuclear distance in Bohr radius, using Matlab 6.5. The interpretation of  shows that the probability in finding the electron in the space between inter nuclear distance of 0,2 is very small for asymmetry and very large for symmetry wave function. If the inter nuclear distance is made larger in several , the probability becomes smaller. The probability density is just equal to individual in finding electron in a hydrogen atom. Key words: The probability density, symmetry and asymmetry wave function, the  ion.
RANCANG BANGUN ALAT PENGUKUR DENSITAS OPTIK RADIOGRAF SINAR-X DIGITAL Sumariyah, Sumariyah; Gunadi, Isnain; Mujib, Syaiful
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

A digitized X-ray radiograph?s optical density measurer has been designed.  It?s scale work is between  0.00 to  4.42. The main part of  this instrument is an optocopler sensor which will convert the light passing by  to an analog current. An optocopler circuit is a combination of LED as a light source, and a photoresistor as a light sensor. The sensor circuit is combined with a voltage devider circuit so that the voltage caused by the light and the output is work reversely. Besides, it combined with an instrumentation amplifier which amplifies the output voltage of the whole sensor. A decoder then added to the circuit to translate the BCD code to a seven segment display. The related segment, then, turned on according to the magnitude of the output voltage. The last part is a seven segment displayer which displays the measure?s result. According to a testing oxamination, the instrument is able to produce a measurement result till a resolution of 0.01.
PEREDUKSIAN COX, NOX, SOX, HC DARI KENDARAAN BERMOTOR DENGAN MENGGUNAKAN PLASMA NON-TERMIK Nur, Muhammad; Wirawan, Bukit Yuta; Adi Wijaya, Wahyu; Suseno, Ahmad; Sumariyah, Sumariyah
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Reduction NOX gas from motor vehicle 1486 cc emission have been done by using corona glow discharge plasma which awakened with power source from modified system ignition of car.NOX Gas is result emission of motor vehicle 1486 cc at 2000 rpm. Flow NOX source are joined with reactor. Corona glow discharge plasma awakened in the reactor with knife to plane electrode geometry configuration with power source from modified system ignition of car. Corona that happened in reactor which containing of motor vehicle gas emission 1496 cc will yield ion, electron, and energetic radical. NOX will turn into compounds which do not dangerous and it?s indicate that pollutants in reactor was reduced.  To get the decomposition efficiency of NOX it?s require to be done the measurement of concentration of NOX before and after reduced. The biggest decomposition efficiency of NOX which obtained in this research is 81.38 % at distributor rotation equal to 1500 rpm with current equal to 80µA. Anion and cation analysis show there are cation NH4+ and anion CO32-, SO32-, and SO42-, that giving hypothesize that one of compiler compound of crust result of system prototype to reduce NOX are ammonium carbonate ((NH4)2CO3), ammonium sulfide ((NH4)2SO3), and ammonium sulphate ((NH4)2SO4).
PENENTUAN STRUKTUR KRISTAL ALMG2 ALLOY DENGAN DIFRAKSI NEUTRON Ismul Hadi, Arif; Sumariyah, Sumariyah; Dahlan, M.; Mohtar, Mohtar
BERKALA FISIKA Vol 14, No 2 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

The determination of crystallography structure of AlMg2 alloy has been done by neutron diffraction. In fabrication process, it was addressed by rolling phases. The first by hot rolling with thickness follows: 8.35 mm; 7.00 mm; 5.6 mm; 2.60 mm; 1.65 mm ± 0.05 at  425 0C temperature extended by cold rolling: 1.65 mm to 1.30 mm ± 0,07 thickness at normal temperature. Counting of the data was started by activate of detector from 110 to 400 angle with 0.075 overstep and preset monitor count of 60,000 at 26 MW. Processing of the data using of microcomputer 16 bit NEC PC-9801 VM2. The results show that the AlMg2 alloy structure are FCC system with lattice parameter (a) = 4.0817 A0.   Keywords: AlMg2 alloy, neutron diffraction, and FCC
KARAKTERISASI SISTEM PEMBANGKIT ALIRAN ELEKTROHIDRODINAMIKA LUCUTAN KORONA POSITIF BERKONFIGURASI ELEKTRODA KAWAT-BIDANG Sumariyah, Sumariyah; Azzulkha, Azzuma Hasna; Nur, Muhammad; Muhlisin, Zaenul
YOUNGSTER PHYSICS JOURNAL Vol 6, No 2 (2017): Youngster Physics Journal April 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The characterization of electrohidrodynamic flow generation system (EHD) has been performed utilizing positive corona discharge configured wire-plate electrode. In this study, the characteristics of the EHD flow generation system in the form of current characteristics as a function of voltage or I-V characteristics with fixed geometry factor, in the without of lubricating oil and with the lubricating oil. The fixed geometry factor was obtained from the radius of the fixed point (r) electrode with various the electrode distance (d). This research was conducted by using positive corona incandescent discharges with wire field electrode configuration. The wire electrode used is made of stainless steel having a length of 5 cm, with wire diameter 0.11 mm, 0.14 mm, 0.21 mm, 0.36 mm, and 0.38 mm. Electrode of field used in the form of circle with diameter 20 cm. Data collection system with variation of voltage, variation of electrode distance, and variation of wire electrode diameter used. Furthermore, data analysis of measurement results was carried out. From the result of characteristic research of EHD flow generator system in the form of current as a function of voltage shows that the increase of voltage is proportional to current increase. While the current as a function of geometry shows the value of the current flowing inversely proportional to the geometry factor of the electrode distance change.Keywords:electrohydrodinamic, ion wind, positive corona discharge 
PENENTUAN SUDUT ARAH ANGIN ION PADA LUCUTAN KORONA POSITIF BERKONFIGURASI ELEKTRODA TITIK-BIDANG Sumariyah, Sumariyah; Restiwijaya, Maryam; Nur, Muhammad
YOUNGSTER PHYSICS JOURNAL Vol 6, No 4 (2017): Youngster Physics Journal Oktober 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Determination of the ion wind angle of positive corona discharge with point to plane electrode geometry configuration has been done. Point electrode was made from stainless steel with various radiuses of 0.26 mm, 0.28 mm, 0.35 mm, and 0.47 mm. The plane electrode with circle form was made from stainless steel with diameter of 20 cm. Determination of the ion wind angle was carried out by measuring the current, the radius of deformation of lubricating oil at various voltage, electrode spacing, and the radius of the point electrode. The results showed that the angle of the ion wind direction is affected by a given voltage, the distance between electrodes, and the radius of the point electrode. Value of the ion wind flow direction angle is inversely proportional to the distance between the electrode and the radius of the point electrode. When the voltage is increased, the angle of ion wind direction will be larger but would reach saturation at the region of corona discharge which is close to the arc discharge.Keywords: Ion wind, positive corona discharges, point to plane electrode.
DESAIN DAN IMPLEMENTASI MESIN COMPUTER NUMERICAL CONTROL (CNC) BERBASIS ARDUINO SEBAGAI PLOTTER UNTUK MENGGAMBAR GARIS DAN BIDANG SEDERHANA Nugroho, Hafidz; Sumariyah, Sumariyah
BERKALA FISIKA Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019
Publisher : BERKALA FISIKA

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Abstract

The aim of this research is to design and to implement a computer numerical control (CNC) machine using a cellular phone through bluetooth networks for drawing on a two-dimensional (2D) area of 40 mm x 40 mm. The machine consisted of several main parts, including DVD motor stepper, L293D, servo motor, HC-05, and cellular phone. The control was carried out by using the Blynk application that can be used in two modes, namely automatic (G-code based) and manual modes. The capability of the machine to draw test images were carried out, including linear motion, circular motion, up and down motion, displaying menu, rectangle shape, triangle shape, and circular shape. Results show that the CNC machine can move to draw images according to the commands given in each command mode.Keywords: CNC, Cellular phone, Bluetooth, Blynk
RANCANG BANGUN SISTEM PENGUKUR KONDUKTIVITAS LARUTAN ELEKTROLIT MENGGUNAKAN MIKROKONTROLER AT89C51 Sumariyah, Sumariyah; Yulianto, Tony; Priyono, Jumadi
BERKALA FISIKA Vol 9, No 3 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

A system of electrolyte conductivity measurement has been designed and realized using microcontroller AT89C51. The system run at the frequency 2.5 Mhz. The adventage of the system is conductivity sensor placed outside the sample liquid. The input of system is NaCl concentration  and the output is conductivity value.The hardware of this system is built by a conductivity sensor, oscillator      XR-2206, a frequency synthesizer IC CMOS 4046, an operational amplifier LM358, an analog to digital converter ADC 0804, a liquid crystal display Seiko M1632, and a microcontroller AT89C51. To control this electrolyte liquid conductivity measurement was used macro assembler machine language.The results of the experiment show that the test of variable oscillator function has linear regression equation Y = 0.56 X + 1.96, amplification of LM358 amplifier test is 3.39 and has linear regression equation Y = 3.28 X + 0.05, ADC0804 conversion function has linear regression equation Y = 51.29 X + 9.97. The test of measurement system was sown that instrument able to measure NaCl conductivity from 0.2 M until  2.0 M with linear regression equation  Y =  67,63x + 6,37.
RANCANG BANGUN SISTEM PENGUKUR KONSENTRASI LARUTAN TEMBAGA SULFAT (CUSO4) MENGGUNAKAN KOMPUTER Sumariyah, Sumariyah; Endro Suseno, Jatmiko; L, Fitria
BERKALA FISIKA Vol 10, No 3 (2007): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

A system  of    Sulphate Copper (CuSO4) liquid consentration measurement by using compute has been made. The display of it through monitor in the computer with the limitation of measurement  0.1 M to 1M. The main components of the measure system of   Sulphate Copper (CuSO4) liquid consentration are : tungsten filamen light which include in the sample and photodioda light sensor also IC 741 as a Operational Amplyfier to strengthen the tension of sensor output. As the chage of the output analog signal power tobe digital signal ADC 0809 is used. And also as an interfce which is the pheripheral instrument of communication equipment with computer is used PPI 8255. The software on  this measure system uses Turbo Pascal version 7.0. This system had been realized and can measure the Sulphate Copper (CuSO4) liquid consentration wich the linier regresion equal is , with X hole is the sample consentration (M) and Y hole is the measure result of the concentration (M) and the deviation is 0.0326.
STUDI PRODUKSI RADIONUKLIDA MEDIS UNTUK GENERATOR 89SR/90Y DARI HASIL REAKSI 89RB(P,N)89SR/90Y PADA SIKLOTRON MEDIK SECARA KOMPUTASI Hidayat, Yusup; Wardaya, Asep Yoyo; Triadyaksa, Pandji; Setiawati, Evi; Muhlisin, Zaenul; Sumariyah, Sumariyah; Suseno, Jatmiko Endro; Binu Soesanto, Qidir Maulana
BERKALA FISIKA Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019
Publisher : BERKALA FISIKA

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A computational calculation to determine production capacity of 90Y from the results of nuclearreactions 89Rb(p,n)89Sr/90Y from several medical cyclotrons has been carried out. Calculations were used to obtain the target thickness of 89Rb and maximum activity of 90Y on variable energy, time and irradiation currents. Calculations were also carried out to measure the impurity radionuclide activity during the reaction. The results activities of 90Y were obtained through modeling using the SRIM-2013 software and the TENDL-2017 application and calculated using MATLAB software. The results modeling and of calculations can predict the activity of 90Y and it can be used as an initial reference in the radionuclide production process using a cyclotron. The maximum activity of 90Y of 5409.80 mCi with a 10.54 mm-target thickness of 89Rb is generated from a cyclotron which has a 30 MeV proton beam with a 50 ?A radiation current beam and 2 hours irradiation time. Using the same proton, current and irradiation time at irradiation energy of 8 MeV, 15 MeV and 22 MeV, the produced activity of 90Y was smaller, there are 552.28 mCi, 2100.39 mCi and 3644.31 mCi. The radioisotope of 90Y can be used in patients with a normal dose of 0.4 mCi / kg body weight, therefore in one production can supply the needs of 104 patients.Keywords: medical cyclotron, calculation and modeling, 90Y activity