Saktioto Saktioto, Saktioto
Dept. of Physics FMIPA Universitas Riau

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STUDI AWAL GRADING BUAH SAWIT DENGAN BANTUAN INJEKSI TEGANGAN LISTRIK SEARAH Saputra, Andri; Candra, Wahyu; Soerbakti, Yan; Syahputra, Romi Fadli; Defrianto, Defrianto; Saktioto, Saktioto
Komunikasi Fisika Indonesia Vol 16, No 2 (2019)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (148.462 KB) | DOI: 10.31258/jkfi.16.2.103-106

Abstract

Maturity progress of palm fruit is greatly depending on the availability of nutrients and environments. Determining maturity level of palm fruit is important to evaluate the quality of palm oil fruits. The younger or too mature fruits will produce poor quality of crude palm oil (CPO). An appropriate devices are needed that can measure the level of fruit maturity so that uniformity of maturity grade can be carried out to obtain high quality CPO. This research provides a preliminary study of voltage change on the surface of oil palm seeds which subjected by electric potential. The low directional voltage (DC) injection treatment, ~ 10V, was applied to investigate the impact of applied voltage on palm oil seeds with three different levels of maturity, i.e. immature (young), ripe and over ripe . The results shown that oil palm fruit quite quickly responds to injection of DC applied voltage with different responding voltage. This responding voltage tends to increase with increasing maturity levels, but decreases for over ripe fruit which has falling down and starting to dry out. 
KARAKTERISTIK PERTUMBUHAN PELEPAH KELAPA SAWIT DENGAN MENGGUNAKAN FIBER BRAGG GRATING MODA TUNGGAL Sutriyono, Didik Puji; Saktioto, Saktioto
Komunikasi Fisika Indonesia Vol 14, No 1 (2017)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (498.511 KB) | DOI: 10.31258/jkfi.14.1.1026-1031

Abstract

Penentuan pertambahan panjang pelepah sawit dapat menggunakan Fiber Bragg Grating (FBG)modatunggal dengan sumber daya input 1mW pada panjang gelombang 1550. Perlakuan FBG dilakukanpada kelapa sawit yang berumur 6 bulan 2 sampel dan 1 tahun 2 sampel. Karakteristik yangdihasilkannya yaitu: adanya sampel yang sama dalam peningkatan pertumbuhan panjang pelepahsawit secara alami yaitu sampel A dan D, sedangkan sampel B dan C terjadi fluktuasi pembacaanpada alat ukurnya. Pertambahan panjang maksimal diperoleh pada sampel C pada pengukuran hari ke-5 yaitu 627173.274 nm sedangkan pertambahan panjang minimum diperoleh pada sampel C padapengukuran hari ke-2 yaitu 582455.966 nm. Perubahan panjang gelombang negatif dialami sampel Bpada pengukuran hari ke-2, ke-5, ke-8 dan ke-14 yaitu ?0,049927414 nm; ?0,2033673 nm; ?0,194798635 nm; dan ?0,18501825 nm. Sampel C juga mengalami perubahan panjang gelombangpada pengukuran hari ke-5, ke-33, ke-36 dan ke-42 yaitu ?0,284538013 nm; ? 0,019009783 nm; ?0,018772398 dan ?0,031391469 nm. Pendekatan Persamaan garis y = ae-bx, dengan nilai a dan bmerupakan sebuah konstanta yang dihasilkan oleh efek pertumbuhan pelepah sawit secaraalami, sedangkan x merupakan waktu pertumbuhan pelepah kelapa sawit.
PENENTUAN DENSITAS SPESIES PLASMA HIDROGEN PADA KESETIMBANGAN TERMODINAMIK TEKANAN ATMOSFIR MENGGUNAKAN MATLAB Fardinata, Reeky; Saktioto, Saktioto
Komunikasi Fisika Indonesia Vol 16, No 2 (2019)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.16.2.113-117

Abstract

Thermal equilibrium hydrogen plasma at atmospheric pressure were simulated using the software matrix laboratory (MATLAB). Runge Kutta method numerical method as a settlement of differensial model equations of chemical kibetik with the arrhenius equation approach and continuity equations so that the equilibrium density values for each species were obtained.  Equilibrium hydrogen plasma at atmospheric pressure and density rate review every reaction involved.  Parameter of ionizing   and disasosiasi  as a reference equilibrium plasma.  Equilibrium plasma is found in time interval 10-6 ? 10-3 s thermal hydrogen plasmas with temperatures of 1 eV.  The density  of hydrogen plasma thermal equilibrium overall are in the interval of 1014 m-3 - 1020 m-3 . The reaction rate of each species varies based on the type of collision and rate of change of species.
IONISASI GAS BUTANA PADA METODE PELEPASAN LISTRIK TEGANGAN SEARAH DENGAN KETIDAKMURNIAN UDARA TEKANAN TINGGI, PLASMA TERMAL Husein, Ikhsan Rahman; Farma, Rakhmawati; Saktioto, Saktioto
Komunikasi Fisika Indonesia Vol 14, No 1 (2017)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.14.1.1006-1012

Abstract

Penelitian ini dilakukan untuk menjelaskan ionisasi gas butana dengan campuran udara padatekanan tinggi. Proses kelistrikan ini menggunakan elektroda grafit pensil yang digunakan untukmelucuti gas pembentukan plasma dengan metode electrical-discharge pada rentang tekananatmosfir. Plasma Karbon diproduksi dengan mengoperasikan tegangan (DC)<3,5kV danmengalirkan gas butana ke dalam tabung plasma. Hasil eksperimen menunjukkan tegangan jatuh danarus listrik. Tegangan dan arus listrik diperoleh sebelum dan sesudah terjadi breakdown. Densitasdan temperatur plasma Karbon dihitung dari arus listrik dan tegangan jatuh. Hasil eksperimenmenunjukkan ionisasi udara pada tekanan rendah memiliki tegangan maksimum 570V, teganganjatuh 530-570V dan arus listrik 0,27-0,45mA, sedangkan pada tekanan tinggi memiliki teganganmaksimum 1160V, tegangan jatuh 900-1100V dan arus 0,46-0,6mA. Ionisasi yang terjadi saatpenambahan gas butana (ketidakmurnian campuran udara) pada tekanan rendah memiliki teganganmaksimum 772V, tegangan jatuh 536-775V dan arus listrik 0,03-0,45mA, sedangkan pada tekanantinggi memiliki tegangan maksimum 1044V, tegangan jatuh 675-1055V dan arus listrik 0,03-0,69mA.Hasil data ini berhubungan dengan variasi distribusi gas yang berada didalam tabung. Hasileksperimen diharapkan dapat digunakan untuk pengembangan pertumbuhan Carbon Nano Tubepada ujung katoda.
KEBERGANTUNGAN TEMPERATUR PLASMA HIDROGEN DALAM TEKANAN RENDAH Alifah, Siti Nurul; Saktioto, Saktioto
Komunikasi Fisika Indonesia Vol 16, No 2 (2019)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.16.2.118-122

Abstract

The density and reaction rate values of plasma are physical quantities needed to produce plasma hydrogen. Both are needed to estimate the heat and the operating time of plasma generator. Density and reaction rate of plasma values are obtained by computational modeling using the continuity and Arrhenius equation. Five spesies of hydrogen are used in this research i.e electron, H2, H2+, H and H+. The pressure used was 9.7 mTorr and the temperature of electron used is higher than the temperatures of the hydrogen species. The temperatures scale used in high at 34812 Kelvin for electron and 9283.2 for other species. The study resulted that hydrogen gas can be plasma when it reaches the time span 3.8x10-7second. The equilibrium conditions last for 10-3 second after the time limit be returned as plasma gas. The result of density for each species at range 1016 until 1018 m-3. The value of the fastest reaction rate equal to 7,3 x 1053 m-3 s-1. 
Profile of Single Mode Fiber Coupler Combining with Bragg Grating Syahputra, Romi Fadli; Saktioto, Saktioto; Meri, Ros; Syamsudhuha, Syamsudhuha; Okfalisa, Okfalisa
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 15, No 3: September 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (550.732 KB) | DOI: 10.12928/telkomnika.v15i3.6383

Abstract

This paper describes a numerical experiment of design and operation of a fiber coupler between single mode fiber and fiber Bragg grating (FBG). Both components are coupled depending with optical waveguide and source parameters. A characterization of fiber coupler is simulated by varying long grating of 10 mm to 60 mm using transfer matrix method based on coupled mode equation. The wave peak, transmission, and dispersion parameters are analyzed to determine the performance of the fiber coupler. The transmission spectrum showed the wave peaks rise to any increase in the grating length on channel 1 and channel 2. Transmission on channel 1 and channel 2 decreased from the wavelength range of 1.45μm–1.55μm and rised in the range of 1,55μm–1,65μm for each increment in length of grating. The dispersion showed the zero dispersion at specific wavelength for each increase in length of grating. This component can be applied for controlling information signal in wide range communication.
PEMBUATAN DAN KARAKTERISASI KARBON AKTIF DARI BAMBU BETUNG (DENDROCALAMUS ASPER) DENGAN AKTIVASI KOH BERBANTUAN GELOMBANG MIKRO Hutapea, Erin Mazelly; Iwantono, Iwantono; Farma, Rakhmawati; Saktioto, Saktioto; Awitdrus, Awitdrus
Komunikasi Fisika Indonesia Vol 14, No 2 (2017)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.14.2.1061-1066

Abstract

Activated carbon had successfully been made from betung bamboo (Dendrocalamus Asper) bycarbonization process for 1 hour with chemical activation using pottasium hydroxide (KOH) with themass ratio of the carbon powder with KOH i.e. 1:0, 1:1, 1:2 and 2:1. In order to activate the carbon,the activation was help by microwave irradiation with the power of 630 Watt for 20 minutes. Thepurpose of this research is to characterize activated carbon using X-ray diffraction (XRD), FourirerTransform Infrared Spectroscopy (FTIR) and absorption of methylene blue. The data of X-raydiffraction pattern indicated that all of the activated carbon were in a semi-crystalline form, with theXRD peaks observed at angel of diffraction (2?) of 21.268o and 41.014o with oriented of (002) and(100) respectively. The highest value of layer (Lc) is resulted from the ratio 1:1 as high as 21.495 nmand this data supported by the highestabsorption of methylene blue at ratio 1:1 as high as 99.327mg/g. Characterization of FTIR showed that the activated carbon had the function of cluster ?OH, CHand C=C. Overall the calculated and analyzed results showed that the variation of KOHconcentration influences the qualities of the activated carbon.
EFEK WAKTU RENDAM AKTIVASI KIMIA BERBANTUAN GELOMBANG MIKRO TERHADAP SIFAT FISIKA KARBON AKTIF DARI KULIT BUAH JENGKOL (PITHECELOBIUM JIRINGA) Asra, Yurike; Iwantono, Iwantono; Saktioto, Saktioto; Farma, Rakhmawati; Awitdrus, Awitdrus
Komunikasi Fisika Indonesia Vol 14, No 2 (2017)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (534.082 KB) | DOI: 10.31258/jkfi.14.2.1109-1114

Abstract

Activated carbon based on jengkol fruit shell at soaking times assisted pottasium hydroxide (KOH)activation by microwave has successfully been made, the ratio of carbon mass to KOH of 2:1. Thechemical activation soaking time was varied at 24 hours, 36 hours, and 48 hours. The aims of thisresearch was to study the effect of soaking time on the physical properties of activated carbon ofjengkol shell that represented by micro structure, surface area, adsorption, and chain structure ofactivared carbon. The micro structure pattens of samples were in semi-crystralline structure as thepresence of quite narrow 2 peaks at 2? : 22,994o and 42,102o representing the crystal orientation of(002) and (100). The highest of stack height (Lc) was produced from the sample with soaking times 24hours which was 1,773 nm, with surface area of 124,50 m2/g. The adsorption of methylen blue was ashigh as 99,569mg/g and chain stucture of activated carbon based on jengkol shell was obtainedfunction group of C-H, C-C, C=O, and C-O at wave number of 2943,43 cm-1, 2369,65 cm-1, 1612,56cm-1 and 1160,23 cm-,1 respectively.
ANALISA PENGARUH FILTER WARNA DAN DAYA LAMPU FLUORESCENT TERHADAP KELAJUAN NYAMUK Rahayu, Gita; Saktioto, Saktioto
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (166.627 KB) | DOI: 10.31258/jkfi.15.2.160-169

Abstract

Mosquitoes are insects that can cause dangerous problems to human health. Therefore, mosquitoes need to be identified based on its motion so it can stay away from human. The purpose of this research is to investigate the effect of power and color spectrum of lamp toward mosquito speed. This research used optical method based on light beam that affected mosquitobody. This research designed a radiation system inside a glass box with thickness of 0,5 cm size (30x7x20) cm. Five mosquitoes were irradiated by light from fluorescent lamp with power 11 Watt and 26 Watt that have been filtered using red, orange, yellow, green, blue and purple color plastics. The radiation process was recorded using a digital camera about 26 minutes. The recorded video was processed using Tracker program. The Tracker program analyzedthe mosquito speed based on its displacement from one to another position. The results showed that mosquito highest speed at unfiltered light, red, blue and purple colors occurred when irradiated with 26 Watt lamp while at color of orange, yellow and green occured when irradiated with 11 Watt lamp. Mosquitoes highest speed value when irradiated by orange, yellow and green are 0,632 m/s, 0,693 m/s and 0,645 m/s. Mosquitoes lowest speed value when irradiated by blue and purple light are 0,308 m/s and 0,285 m/s. The speed of the mosquitoes when irradiated by red and unfiltered lights are 0,517 m/s and 0,541 m/s respectively. The data showed that mosquitoes moved away from light source when irradiated by unfiltered lights, red, blue and purple while mosquitoes approached the light source when irradiated by orange, yellow and green light.
ANALISIS KOMPENSASI DISPERSI MENGGUNAKAN PENGUAT RAMAN PADA JARINGAN WDM (WAVELENGTH DIVISION MULTIPLEXING) DALAM KOMUNIKASI SERAT OPTIK Ikhsan, Roby; Syahputra, Romi Fadli; Saktioto, Saktioto
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (130.974 KB) | DOI: 10.31258/jkfi.15.2.88-92

Abstract

The discovery of optical fiber cause widespread revolution of communication system. Optical fiber communication has excellency on data transmission speed, security, flexibility, and broadly bandwidth. The applying of WDM network can broaden the bandwidth so that the transmission performance becomes more splendid. Although some factors such as dispersion, attenuation, and scattering can hinder the performance of fiber optic on sending data. Moreover dispersion can wreck data and spread pulse as it travels alongs fiber so that causing interference. There is some methods  of dispersion compensation. In this paper, Fiber Raman Amplifier is used on WDM network to strengthen signal which is sent to detector. This research utilize simulation approachment  with various bandwidth and length fiber. The results show lowest BER value and highest Q-factor at bandwidth frequency of 30 GHz and fiber length of 20 km.