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All Journal Jurnal Keteknikan Pertanian Komunikasi Fisika Indonesia TELKOMNIKA (Telecommunication Computing Electronics and Control) Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Pendidikan Ekonomi Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Journal of Aceh Physics Society JOURNAL ONLINE OF PHYSICS Jurnal Fisika FLUX Unri Conference Series: Community Engagement JRAP (Jurnal Riset Akuntansi dan Perpajakan) Science, Technology, and Communication Journal

Defrianto Defrianto

Unknown Affiliation

Author-ID : 251115

Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mathematics Physics

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PEMETAAN TINGKAT KEBISINGAN YANG DITIMBULKAN OLEH MESIN PENGOLAH KELAPA SAWIT DI PT. TASMA PUJA, KABUPATEN KAMPAR-RIAU Ade saputra; Defrianto '; Tengku Emrinaldi
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 mapping noise levels generated by the palm oil processing machine in PT. Tasma Puja Kab. Kampar, Riau by using grid method has been conducted . The result was the noise intensity of the lowest to the highest one at 121 points in a safe area. The intensity was described in mapping using "Software Surfer 11", which generates the contour then combine with the location of PT. Tasma Puja indicated by different colors: black, blue, sky blue, green, yellow, red and purple. The highest intensity was located at the coordinates N 010 18.735 and E 1010 01.204, 98 dB was indicated by the color purple which the temperature reaches 400C, the lowest noise intensity is N 010 18.710 and E 1010 01.172 and 46 dB shown by the black color where the temperature reaches 290C. The higher temperature is due to the higher the intensity of the noise. The lower air temperature will have the lower the intensity noise. Based on the results at PT. Tasma Puja, there are several locations has exceeded the value of the noise quality standards established by the labor minister's decision number: KEP-51 / MEN / 1999. i,e 85 dB.

PENGGUNAAN GELOMBANG AKUSTIK PADA PROSES PEMISAHAN PARTIKEL PENGOTOR DALAM AIR DENGAN MENGGUNAKAN TABUNG RESONANSI Lifa Anggar Mayasari; Defrianto '; 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 done on the use of acoustic waves in order to separate pollutant particles in water. This research has been performed by an experimental method utilizing the second and the third harmonic mode of acoustic waves. The results showed that the use of both modes was affected by their intensity. It was proved that the treatment of the second harmonic mode wave yielded the difference of concentration of water that depended on the intensity level ( IL ) of the wave. The value of 0.035 mg/L, 0.09 mg/L, and 0.15 mg/L have been found respectively, for the IL of 83.2 dB, 92.4 dB, and 102.3 dB by second harmonic mode treatments to the water of 0.40 mg/L. Meanwhile, the use of the third harmonic mode wave treatments to the same water samples gave the differences of concentration of 0.07 mg/L, 0.11 mg/L, and 0.17 mg/L respectively, for the ILs of 65.9 dB, 75.2 dB, and 84.8 dB. It was showed that the treatment of the third harmonic resulted bigger difference concentration of the samples. The bigger the difference concentration, the better the separation of pollutant particle in the sample. It can be concluded that acoustic waves can be used to separate the pollutant particles in water.

MODEL POLA LAJU ALIRAN FLUIDA DENGAN LUAS PENAMPANG YANG BERBEDA MENGGUNAKAN METODE BEDA HINGGA Vira Marselly; Defrianto '; Rahmi Dewi
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 writer has done a research on the model of rate pattern of liquid fluid flow by using flow model that has different pattern. The Equation of continuity was used to solve flow rate case, while Equation of Laplace two dimensions was used for numerical case by finite difference methods by using MATLAB R2009b (version 7.9.0.529). The purpose of fluid research was making flow pattern then analyzing fluid flow to each point in dimensions on Equation of Laplace. The methodology used in this research was evaluating Equation of Laplace concept, identifying the problems, two dimensions of Laplace equation used, completing the numerics by using finite difference methods, and completing analitics for simple cases. The results showed that there was no significant between analytical and computation of fluid flow rate. It can be seen the average of error value is close to zero and the highest error value is 0,000,778 % . Even in various geometry problems, the flow pattern can is be also visualized.

Efek Tegangan Searah pada Aliran Ionik dan Geometri Pelepah dan Daun Kelapa Sawit Toto Saktioto; Defrianto Defrianto; Suhardi Suhardi; Dewi Indriyani Roslim; Awitdrus Awitdrus
Jurnal Keteknikan Pertanian Vol. 6 No. 1 (2018): JURNAL KETEKNIKAN PERTANIAN
Publisher : PERTETA

AbstractProductivity of palm tree grown are generally measured in months periods, but in a shorter time scale is particularly less measured by the plant maintenance of palm tree. Consideration of the general productivity in time is how to produce good fruit fertilizer (chemical aspect), healthy plants, fast growing and evolving (agricultural aspect) and genetic type of palm that grows (biological aspect). However, the growth and production on the physical aspect is still less attention. Through physical treatment, the growth of palm tree can be optimized, as it has been proven in advanced countries on the plant Aloe Vera, Avocado and Pine trees. This paper proposes a treatment of direct current voltage to palm tree that can accelerate the flow of ions to grow and develop nutrients with the increment of geometry and sturcture of leaf and midrib. The palm tree samples are aged 1 to 5 years corresponding to the provision of various current voltage. Identification of samples before and after treatment by electricity determined is based on the geometry of leaves and midrib and ions effect. This identification can support the productivity of palm trees.AbstrakProduktivitas kelapa sawit pada umumnya diukur dalam periode bulanan, tetapi dalam skala waktu yang lebih singkat masih kurang terukur dengan pemeliharaan tanaman sawit. Pertimbangan umum produktivitas tersebut adalah bagaimana pupuk menghasilkan buah yang baik (aspek kimia), tanaman sehat, cepat tumbuh dan berkembang (aspek pertanian), dan jenis genetik sawit yang tumbuh (aspek biologi). Namun, pertumbuhan dan produksi pada aspek fisik masih kurang diperhatikan. Melalui perlakuan fisis, pertumbuhan kelapa sawit dapat dioptimalkan, seperti yang telah teruji di negara-negara maju pada tanaman Aloe Vera, Avocado dan Pohon Pinus. Perlakuan pemberian tegangan listrik searah terhadapkelapa sawit dapat memepercepat aliran ion-ion untuk tumbuh dan berkembang dengan penambahan unsur hara dan struktur geometri pada daun dan pelepah. Sampel yang digunakan adalah pohon sawitberusia 1 hingga 5 tahun dengan pemberian tegangan bervariasi. Identifikasi sampel sebelum dan setelah diberi perlakuan listrik ditentukan berdasarkan geometri daun dan pelepah dan efek ion-ion. Identifikasi ini dapat mendukung produktivitas tanaman sawit.

PEMODELAN TAPIS FABRY-PEROT PADA SERAT OPTIK DENGAN MENGGUNAKAN FIBER BRAGG GRATING Septi Pramuliawati; Saktioto '; Defrianto '
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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Fabry-perot filter was successfully developed by a uniform Fiber Bragg Grating in fiber optic. A characterization of Bragg Grating was analyzed by using computational model with second-order of Transfer Matrix Method based on Coupled Mode Theory. The reflectivity, length of grating, and bandwidth were parametrics to determine the performance of single Bragg Grating. The transmission spectrum showed the longer grating is designed, the larger the reflectivity was produced, so that the transmission band was more narrow. The simulation carried out by varying the separation distance between two gratings was alsoevaluated by dual Bragg Grating. The separation distances from 0.5 cm to 9.5 cm with 1 cm length step. The simulation result showed the maximum peak value generated in the transmission spectrum increased directly proportional to the distance between the gratings. Thus, the grating can be applied as a filter. Only selected wavelength is allowed to transmit the signal until the end of the optical fiber.

ANALISA PENGARUH VEGETASI TERHADAP TINGKAT KEBISINGAN DI SEPANJANG JALAN RAYA PEKANBARU-BANGKINANG Azura '; Erwin '; Defrianto '
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 influence of vegetation such as ketapang, sengon, mango, of acacia, durian andpalm along Pekanbaru-Bangkinang highway against noise level has been studied. Noisesource was originated from sound of vehicles passing through the highway. An instrument used to record the noise level in the study is Sound Level Meter (SLM). In order to obtain the absoption of noise level, then it was used 2 SLMs. The first SLMwas utilized to record the noise directly generated by vehicles without any obstaclesand the second SLM was located behind the trees as sound obstacles. The position ofthose two SLMs was arranged along the road with the distance of about 15 m from thehighway. The next measurement was to record the noise level for one day started from7: 00 a.m until 6: 00 p.m along the highway. The influence of the distance against thenoise level was also studied. The result of this research showed that palm trees has thehighest effect on noise reduction and followed by acacia, mango, durian, sengon andketapang trees. The high absorption of sound by palm tree of about 6.092% because the volume of the palm leaves per percentage of the absorption is smaller compared tothose for other vegetations. These results were compared to those of Maekawa andISO9613 calculation. From the comparison, it was obtained that Maekawa calculation ishigher compared to those of this research, while the ISO9613 calculation was lower.The error percentage of the calculation for Maekawa and ISO9613 was 6.82% and8.76% respectively. The profile of one day noise along the highway as a function of time showed that there were two peaks of noise that were occurred at 09.00-10.00 and17.00-18.00. Moreover, the noise level was reduced very significantly from 71.90dB(A) to 63.58 dB(A) as the measurement away from the noise source.

PENGOLAHAN ISYARAT METODE DIFERENSIAL UNTUK LINIERISASI SENSOR KOIL DATAR Kisna Pertiwi; Usman Malik; Defrianto '; Lazuardi Umar
Komunikasi Fisika Indonesia Vol 13, No 12 (2016)
Publisher : Universitas Riau

Sensor induktif koil datar mengevaluasi perubahan induktansi bersama dari objek ukur pada kumparan. Koil geometri lingkaran bekerja dengan mendeteksi tanpa kontak fisik dengan objek tersebut yang dibuat pada FR4 Printed Circuit Board (PCB). Osilator LC digunakan untuk mengevaluasi perubahan induktansi dari dua sensor identik dalam struktur diferensial dengan massa penganggu, yaitu tembaga berilium (Cube) bergerak maju mundur antara sensor. Batas pengukuran dengan jarak minimum diperoleh frekuensi sebesar 3,45MHz untuk sensor koil datar 1 dan 2,41MHz untuk sensor koil datar 2. Linierisasi menunjukkan sensitifitas suatu sensor dengan nilai dua kali dari sensitifitas satu sensor.

PENGARUH DOPING MANGAN TERHADAP KOMPOSISI DAN SIFAT KRISTALINITAS PARTIKEL OKSIDA BESI PASIR ALAM SUNGAI ROKAN DIPREPARASI DENGAN METODE BALL MILLING Rahman Kurniawan; Salomo Salomo; Erwin Erwin; Defrianto Defrianto
Komunikasi Fisika Indonesia Vol 19, No 2 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.2.113-118

The composition, crystallinity and magnetic susceptibility of nanoparticles in natural sand of the Rokan River, Riau Province have been investigated. After the iron sand separator (ISS) process, the natural sand samples were separated using NdFeB magnets to separate iron oxide particles and other non-ferrous oxides. For 70 hours, the NdFeB product was prepared using the ball milling method to produce BM products. The BM products were ball milled for 30 hours with a manganese doping concentration of 0 wt.%; 5 wt.%, and 10 wt.% produced DM 0, DM 5 and DM 10 products. Magnetic susceptibility values increased based on the values of B0 and BT measured using Pasco Magnetic Probe PS-2162. The results of XRD analysis of DM products contain a hematite phase (α-Fe2O3) which has a hexagonal structure. The crystal size increased along with the increasing concentration of Manganese from 25.494 nm; 25,542 nm to 25.669 nm. The results of XRF analysis of DM products on Fe elements decreased in percentage with increasing Manganese concentration from 18.083%; 15.407% to 12.947%. Other chemical elements such as Si, Al, K, P, Ti, Ca, Ti, Cr, Zn, V and Pb also decreased.

Pengaruh Sosialisasi, Sanksi, dan Kepercayaan terhadap Kepatuhan Wajib Pajak dalam Membayar Pajak Pph Pasal 21 Meiliyah Ariani; Defrianto Defrianto; Zulhawati Zulhawati
Jurnal Riset Akuntansi & Perpajakan (JRAP) Vol 3 No 02 (2016)
Publisher : Magister Akuntansi Universitas Pancasila

A B S T R A C T This study aims to determine the effect of Socialization Taxes, Penalties Tax, and Trust Officers Against Taxes on Individual Taxpayer Compliance in Tax Paying Income Tax Article 21 (Empirical Study KPP Pratama Jakarta Kebayoran Lama). Data were obtained from the questionnaire (primary). analysis of the data model used in this research is multiple regression analysis. Sampling was done by accidental sampling method (Convenience Sampling). Based on the results of data analysis using SPSS 23 shows that the t-test results prove the hypothesis that socialization tax and penalties tax have no effect, while the effect on the confidence of taxpayer compliance in paying taxes Income Tax Article 21 on KPP Pratama Jakarta Kebayoran Lama. F-test results prove the hypothesis that socialization tax, penalties tax, and the trust officers against taxes has a positive influence on tax compliance in paying taxes Income Tax Article 21 on KPP Pratama Jakarta Kebayoran Lama. A B S T R A K Penelitian ini bertujuan untuk mengetahui Pengaruh Sosialisasi Pajak, Sanksi Pajak, dan Kepercayaan terhadap Aparat Pajak dalam Kepatuhan Individu Wajib Pajak Membayar Pajak PPh pasal 21 (Studi Empiris KPP Pratama Jakarta Kebayoran Lama). Data penelitian diperoleh dari kuesioner (primer). analisis model data yang digunakan dalam penelitian ini adalah analisis regresi berganda. Pengambilan sampel dilakukan dengan metode accidental sampling (Convenience Sampling). Berdasarkan hasil analisis data dengan menggunakan SPSS 23 menunjukkan bahwa hasil hipotesis t-test membuktikan bahwa sosialisasi pajak dan sanksi pajak tidak berpengaruh, sedangkan kepercayaan terhadap aparat pajak berpengaruh pada kepatuhan dari wajib pajak dalam membayar pajak PPh pasal 21 di KPP Pratama Jakarta Kebayoran Lama. Hasil hipotesis f-test membuktikan bahwa sosialisasi pajak, sanksi pajak, dan kepercayaan terhadap aparat pajak memiliki pengaruh positif pada kepatuhan wajib pajak dalam membayar pajak PPh pasal 21 di KPP Pratama Jakarta Kebayoran Lama. JEL Classification: H26, H83

ANALISIS TINGKAT KEMATANGAN BUAH SAWIT DENGAN INJEKSI TEGANGAN SEARAH Dino Yanuardi; Saktioto Saktioto; Romi Fadli Syahputra; Defrianto Defrianto; Yan Soerbakti
Komunikasi Fisika Indonesia Vol 20, No 2 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.2.109-114

Palm fruit is Indonesia's main communiqué as the largest foreign exchange contributor processed into crude palm oil (CPO). However, the quality of CPO that will be produced is influenced by the right level of maturity of palm fruit so as not to cause losses from the processor. Losses from the palm fruit processing can be overcome using a method that can determine the maturity level of the palm fruit, one of which is by injecting the voltage in the direction of the palm fruit. The purpose of direct voltage objection to the function of time in the palm fruit is to obtain a voltage response relationship to the content of yield, moisture content and free fatty acid (ALB) in the palm fruit. In this study, palm fruit was classified into 4 levels of maturity, namely unripe, almost ripe, ripe and overripe given direct voltage injection of 9 Volts for 1 minute with 3 repetitions using four electrodes arranged parallel to obtain an electrical voltage response with an electrode diameter of 1.4 mm. The distance between electrodes was chosen to be 4 – 6 mm from stainless steel materials, and the depth of the electrode to the palm fruit is 3 – 5 mm. Palm fruit was injected with electrical voltage and obtained the value of voltage response, electric current, resistivity and power of each level of maturity. The electrical information obtained will explain the yield content, water content and ALB in palm fruit in accordance with the classification of ripeness. The results of the study obtained, that the palm fruit is said to ripen when it has a voltage response value of 0.586 – 0.765 V, electric current 385 – 404.9 μA, resistivity 40.197 – 54.523 Ωm, and power 0.238 – 0.299 mW. The results showed that the maturity level of palm fruit based on its chemical content affects the properties of electricity.

Co-Authors Abdullah, Hewa Yaseen Ade Saputra Agrina, Agrina Ahlunnazah, Muhammad Andika Thoibah Andika Thoibah Andri Saputra Anita, Sofia Asyana, Vepy Awitdrus Awitdrus, Awitdrus Azura ' Debora M Sinaga Dedi Irawan dedi irawan Dedi Irawan Dewi Indriyani Roslim Dino Yanuardi Dwi Putri Cahya Safitri Eri Wiyadi Erwin ' Erwin Amiruddin Erwin Erwin Erwin, ' Fadhali, Mohammed Fadhali, Mohammed M Haryana Hairi Juandi Juandi Kisna Pertiwi Krisman ' Lazuardi Lazuardi Lazuardi Umar Lifa Anggar Mayasari Lihayardi, Lihayardi Lubis, Nuraina Fika M. Rasyid Ridho Maksi Ginting Mbantun Ginting Meiliyah Ariani, Meiliyah Melani Seprima Minarni Shiddiq, Minarni Moh Danil Hendry Gamal Mutiara Akhdesia Nuraina Fika Lubis Okfalisa Okfalisa Pratama, Nando Putri, Ika Aprilla Rabin, Mohammed Fisal Rahman Kurniawan Rahmi Dewi Rahmondia N. Setiadi Ramadhani, Fatima Nur Reynal Nur Razzaq Riad Syech Riad Syech Rina Afriza Rina Amelia Rini, Ari Sulistyo Rini, Ari Sulistyo Risanto, Joko Riska Amalia Rofeah ' Romi Fadli Syahputra Saktioto Saktioto Saktioto, Saktioto Salomo ' Salomo Salomo Sandra Septiana Septi Pramuliawati Soerbakti, Yan Soerbakti, Yan Sofia Anita Suhaivi Hamdan Suhardi Suhardi Suhardi Suhardi Sultan Fiddunya Fiddunya Syahril Syahril Syamsudhuha Syamsudhuha Tengku Emrinaldi Titrawani Titrawani Usman Malik Usman Usman Vepy Asyana Vira Marselly Vivina Eprillison Wahyu Candra Walfred Tambunan Wildan Adli Wima Puspita Wirianto, Hazmi Yan Soerbakti Yan Soerbakti Yohanes Dwi Saputra, Yohanes Dwi Yupapin, Preecha Zahroh, Siti Zamri, Zamri Zulfa Zulfa Zulhawati Zulkarnain Zulkarnain

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