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Sugianto '
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Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Mathematics Physics

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ANALISIS KUAT TEKAN BETON TANPA TULANGAN DENGAN MENGGUNAKAN METODE UJI TAK RUSAK BERDASARKAN KECEPATAN GELOMBANG SONIK Yudi Candra; Riad Syech; Sugianto '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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A research on the testing of concrete elasticity has been done in order to measure concrete compressive strength  using a non destructive test based on sonic wave velocity. An equipment that was used for this research was a Sonic Wave Analyzer (SOWAN). In this research, concrete samples were formed in cylindrical shape with 15 cm diameter and 30 cm length. The compressive strengths of this concrete were 19  , 23    , and 25      ( ⁄ ). After that the time delay of sonic wave was measured. The research results showed that primary and secondary sonic wave velocity, elasticity, and compressive strenght were    = 3525 m/s,    = 1950 m/s,  23240  x N/ , and  24 x    ( ⁄ )  respectively. Based on the data, it was concluded that this non destructive test based on sonic wave velocity can be used to measure the concrete compressive strength, because the values obtained were comparable to the values obtained using the Universal Testing Machine (UTM) which is a destructive test.
PEMBUATAN KARBON AKTIF MONOLIT DARI KAYU KARET MENGGUNAKAN AKTIVATOR KOH DAN HNO3 UNTUK APLIKASI SUPERKAPASITOR Zulkifli '; Erman Taer; Sugianto '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Activated carbon  monolith  (ACM)  was made  from  rubber  wood  for supercapacitor  applications  by using  two  activators,  namely  KOH  and  HNO3 . Carbonized sample were by N2 gas at a temperature of 600º C and were physically activated  by  CO2gas  at  800º C  for 2  hours.  KOH solution  of  1,  3  and  5M  was used  as  chemical  activation  solution.  ACM  electrodes  were tested  in  a two-electrode system,  which was stainless steel  as a  current  collector  and a 1M  H2SO4 solution  as  an  electrolyte  solution.  Electrochemical characterization  results by impedance  spectroscopy  methods  showed an increase  in the  capacitive  properties, followed by  a decrease in  cells  resistance. The  measurements  obtained the best capacitance  of  55.46  F/g.  XRD  patterns of  the samples showed  amorphous structure  and  SEM images  showed that  the  addition of  KOH  solution  resulted in the  pore  structure  of macroporous  and  mesoporous  combination.  In conclusion, this current result showed that the activator of KOH and HNO3have improved the performance of the ACM rubber wood electrode.
PENGARUH MAGNETIK Fe3O4 PADA SERBUK KARBON TERHADAP TINGKAT PENYERAPAN LIMBAH LOGAM Fe Nur Akmal; Erman Taer; Sugianto '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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The study on  synthesis  and  characterization  of magnetic   carbon from  mixture of rubber wood sawdust and    for  heavy metal  of Fe  absorption on the Siak river water samples  has been done.  The process of milling and seaving  resulted  a smallcarbon  particle size  of  38 μm, the increase in surface area of  the  carbon  has beenachieved  by  chemical activation using the KOH Activator  with  weight  ratio  of  carbonpowder  of  4: 1. After that,  carbon powder that had  been activated  was  mixed  to by  comparison of 5: 4. The mixing  process was  done  using  a  mortar and continued  toballmiling  process for 2 hours. Finally, a mixture of carbon powder and   was carbonized at  temperature  of   850oC    in  N2 gas and then proceed to  washing and drying proceses in order to produce carbon magnetic  . Absorption testing of heavy metal of Fe  in  Siak  river water samples  was  performed with variations in  immersing time of ½   hours, 1 hour,  and 2 hours. Atomic absorption spectroscopy test results revealed that absorption after 2 hours  increased from  34,17%  (without     to  39,63%  (using magnetic   .  Characterization  of x-ray diffraction  showed  the  peak  of  Fe  at  2θ = 46,28o and  scanning electron microscopy  showed  uniform  particle  size  with  irregular shape  and  whitish  color.  Results  of  Dispersive X-Ray  Energy (DXE) proved the existence of metal Fe in magnetic carbon absorbent material   from rubber wood sawdust.
PENENTUAN KADAR AIR UBI KAYU MENGGUNAKAN PLAT KAPASITOR SEJAJAR Rizki Amelia; Maksi Ginting; Sugianto '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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A research has been conducted on Determining Moisture Content of Cassava by Using Parallel Plate Capacitor . This experiment was carried out by perforning two methods: gravimetric and parallel plate capacitor. Methods gravimetric method was carried out to determine the water content as a standard while parallel plate capacitor while the method was performed to measure current so that water content of the sample can be determined. The samples were consisted of two types; white cassava and red cassava, 10 cm long, 5 cm wide and 0,5 cm thick. The measurement results showed that the water content of cassava whites ranged from 48,8% to 56% and cassava red ranged from 55,1% to 57,5%. The greater the water content, the greater the current.
PENENTUAN TINGKAT KEBISINGAN PADA PABRIK KELAPA SAWIT PT TASMA PUJA KECAMATAN KAMPAR TIMUR Jasmareni Sri Kurniati Baalijas; Juandi '; Sugianto '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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The noise levels generated by the palm oil processing machine are demonstrated. Noise level measurement was done at different positions in the engine room area (location 1) and the office area (location 2) by using a Sound Level Meter (SLM) SL 4112. The results showed that the intensity of the noise caused by the engine plant in location 1produce the maximum value of 93.68 dB on Wednesday and 91.99 dB minimum value on Monday, while the second location has maximum value is 71.72 dB on Saturday and the minimum value is 68,63 dB on Monday for duration one week. This difference is due to the accumulation of noise levels with increasing time and background activities that can affect the value of the measurement. Measurements were carried out during one week on the average value of 93.68 dB at location 1 and 71.72 dB at location 2.
RANCANG BANGUN RANGKAIAN TIMER OTOMATIS PESAWAT ATWOOD Dema Siska Afrilla; Walfed Tambunan; Sugianto '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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A research has been conducted on designing of an automatic  atwood  experiment using an  automatic  timer.  The  automatic timer  consisted  of  3  important components, four relays,  a  stopwatch, and  an  accelerometer.  This automatic  timer  was used to  determine the duration time of the weight falling  from a certain height.  Testing  of the timer was performed on the atwood machine with mass m1 0,2 kg and m2 0,22 kg. This experiment was done at  heights of 0,3  m, 0,4 m, 0,5 m, 0,6 m, 0,7 m, and 0,8 m, respectively.   The experiment results were compared to the results of the same experiment but using a stopwatch instead of the automatic timer. Both of the experiments, using the automatic timer and the stopwatch are compared to the theoretical calculation. The results showed that the error percentage using the automatic timer ranged from  1,95 % -  4,34 %  while the error percentage using stopwatch ranged from  5,96% to 12,88%, respectively. It showed that the result using the automatic timer gave lower percentage of error than the result using the stopwatch.
PENENTUAN KUALITAS BATU BATA MERAH BERDASARKAN KONDUKTIVITAS TERMAL Rika Utari; Sugianto '; Erman Taer
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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A compressive strength testing (  ) and thermal conductivity testing (k) havebeen performed on red bricks from the district of Tenayan Raya and Rumbai. Thisresearch using a compression machine, iron, solder, thermometer, styrofoam and itspurpose was to prove the theory of the thermal conductivity having relationship tocompressive strength. The result showed that the highest compressive strength due tothe conventional red brick of Rumbai district is 10.82 x 10 5 N/m 2 and the lowestcompressive strength due to the press red brick of Tenayan Raya district is 3.67 x 10 5N/m 2 . The research results of thermal conductivity showed that the thermal conductivityvalue of the best sample of conventional red brick of Rumbai district is 1.05 J/sm  C andthe thermal conductivity value of the lowest sample of press red brick of Tenayan Rayadistrict is 0.857 J/sm  C . The affecting factor of the quality of red bricks is density. Thedensity of conventional red bricks of Rumbai district for compressive strength andthermal conductivity, are 2486.880 Kg/m 3 and 2200 Kg/m 3 , respectively. Meanwhileaverage density of press red brick of Tenayan Raya district for compressive strength andthermal conductivity are 1696 Kg/m 3 and 2000.5 Kg/m 3 , respectively. Based on theresult there was in relationship between compressive strength and thermal conductivitywhich was discribed by the regression equation Y  2 x 10  7 X  0 . 812
PENENTUAN SIFAT LISTRIK AIR PADA WADAH ALUMINIUM DAN BESI BERDASARKAN PENGARUH RADIASI MATAHARI Yusuf Syetiawan; Sugianto '; Riad Syech
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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A  research has been conducted  to  determine  the electrical properties  of water  in  an aluminum and  iron  containers.  The  waters  used  were  well  and  rain  water using  metaland  aluminum  containers.  This research was conducted  using  an experimental method. The results showed  that  the  best  electrical properties  was  found from  rain  water  in the aluminium  container  with its  resistivity  of  18.294m ,  electrical  power  of  0.00046  W, electrical energy  of  2,941  J  and  electrical  conductivity  of  0.055  (1)m.  The  resultsindicated  that  greater  solar radiation  in  the  water  could  produce  of  electrical properties greater  than  that  of water  on  the electrical  properties of  the electrical  resistivity.The affecting factor of electrical  properties of  the rain  water  was  concentration  of  Fe  and  Cu. The  concentrations  of  Fe  and  Cu  in  rain  water  was  0,065  ppm  and  0,050  ppm.  It was also found that  the smaller  the  concentrations of  Fe  and  Cu  levels  in  solution  was  the purer the solution.
RANCANG BANGUN ALAT PERCOBAAN MOMEN INERSIA DENGAN MENGGUNAKAN TIMER OTOMATIS Hari Rizki Pratama; Riad Syech; Sugianto '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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A research has been conducted on designing of an automatic experiment ofmoment of inertia using a self-timer with a variation in radius of a cylinder as an inertialbody. This research was done using an experimental method and especially to design aself-timer calculation tools used in the experiment. The trial results showed that at 0.10m height average time for a cylinder rolling on an inclined plane with a slope of 2.87°for 2 m length could be represented by the regression equation that is y = 0.031x +0.400. Based on the result of the experiment, the coefficient of the moment of inertiaranged from 0.509 to 0.523 with a percentage error ranged from 1.800% to 4.600% andstandard deviation of experimental time measured from 0.011 to 0.034 seconds.
EFEK VARIASI WAKTU BALL MILLING TERHADAP KARAKTERISTIK ELEKTROKIMIA SEL SUPERKAPASITOR BERBASIS KARBON Fitria Puspita Sari; Erman Taer; Sugianto '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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Supercapacitor electrodes from  rubber wood saw dust (RWSD) have been fabricated using experiment method to study the ball milling  variation time  on performance of the supercapacitor cells. The carbon electrodes were prepared with time variation of  20, 40, and 80 hours and thickness  of  0.2 mm.  Carbon  electrodes were carbonized at 600oC and  followed by  physical activation  method in  CO2  gas atmosphere  on the constant temperature of 900o C, and chemical activation was performed by  KOH as an activating  agent. Densities  of the electrodes were  0.849 g/cm3 , 0.892 g/cm3 , 0.982 g/cm3 respectively. XRD measurement showed the peaks of carbon  electrodes at 2θ of 24.091o and  44.473o which represented  the presence of carbon  materials  with their crystal orientation of (002) and (100). SEM micrograph  on  magnification of 1000X showed that the pore  distribution of the carbon  electrodes dominant on macropores. This study found that the effects  of  increasing  of  ball milling  time  influenced  the electrochemical properties of  supercapacitor electrodes fro m RWSD.  The optimum  supercapacitor performance was found on  20 hour  milling time  electrode  and had a specific capacitance of 55.414 F/g.
Co-Authors Andi Syahputra Anthika ' Dema Siska Afrilla Dewi Muliana Doni Pandra Elisa Saadah Erman Taer Fitria Puspita Sari Hari Rizki Pratama Jasmareni Sri Kurniati Baalijas Juandi Juandi M. Nor ' Maksi Ginting Martha Rianna Minarni ' Muhammad Mashuri Mustika, Widya Sinta Nur Akmal Riad Syech Rika ' Rika Utari Rizki Amelia Romadona ' Rutmayanti Pandiangan Saktioto Saktioto Usman Malik Walfed Tambunan Yudi Candra Yusuf Syetiawan Zelviana ' Zulhelmi, Zulhelmi Zulkifli '