Article Per Year (5 Year)
p-Index From 2019 - 2024
1.686
P-Index
This Author published in this journals
All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Energi Dan Manufaktur Bumi Lestari Jurnal Sains Materi Indonesia Journal of Engineering and Technological Sciences Telaah Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) BULETIN FISIKA Kappa Journal
Hery Suyanto
Program Studi Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Udayana
Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Other

Published : 25 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 25 Documents
Search

 1   2   3 
ANALISIS KUALITATIF PADA BATU KECUBUNG KOPI MENGGUNAKAN LIBS Ida Ayu Gede Kusuma Dewi; Hery Suyanto; Ida Bagus Alit Paramarta; K. Suastika
BULETIN FISIKA Vol 17 No 2 (2016): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

It has been conducted research on the qualitative analysis on amethyst coffee using LIBS.This study aims to determine the content of the element in amethyst coffee that can later be used as a comparison or reference further research in the elemental analysis amethyst coffee. With treatment, the laser irradiated amethyst coffee at 100 mJ, and the data retrieved by the accumulation of 3, delay time 1 µs and repetition as much as 3 points in different areas of each region analysis of depth function (Depth Profile) with 60 times the laser irradiation. The main element as a constituent amethyst Coffee is silicon (Si), Sodium (Na), calcium (Ca), potassium (K) and oxygen (O2), while the element on its outer surface is iron (Fe) and phosphorus (P) were analyzed using LIBS.
The Classification of Primitive-Shaped Patterns by Using Principal Component Analysis Method IGA Widagda; Hery Suyanto
BULETIN FISIKA Vol 20 No 2 (2019): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstrak – The recognition or classification of patterns is a major problem in computer vision. Many methods have been applied such as: moment invariant, Artificial Neural Networks (ANN), K-mean, Support Vector Machine (SVM) and others. These methods have a few limitations. The moment invariant fashion is highly vulnerable to noise. ANN methods require a long computing time (especially multi-layer ANN) during the training process. On the other hand, the dimensions of the features generated from the methods are relatively high, which requires large storage space (memory). In addition, this leads to the long computing time when the testing process is carried out. Based on these facts, this research makes use of methods that being able to reduce the feature dimensions, namely the Principal Component Analysis (PCA). In the PCA method the dimensions of the sample image are converted to principal components (face space), whose dimensions are much smaller than the dimensions of the sample image itself. Our works exhibit that the PCA method is highly effective in carrying out the pattern classification process. This can be indicated by the relatively high values of Predictive Accuracy, Precision and Recall (close to 1) while the FP Rate is low (close to 0). Moreover, the location of the point coordinates (FP Rate, TP Rate) in ROC graphs is fallen in the upper left region (approaching the perfect classifier region).
ANALISIS UNSUR Ag PADA SAMPEL CAIR DENGAN LASER INDUCED BREAKDOWN SPECTROSCOPY (LIBS) Sinaga Natalia Declarossy; Hery Suyanto; Manuntun Manurung
BULETIN FISIKA Vol 15 No 1 (2014): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

It has been done research on the analysis of Ag element in the liquid electrolyte with Laser Induced Breakdown Spectroscopy (LIBS) through electrolysis method. Observations conducted by LIBS using Nd-YAG laser (1064nm, 7ns). Prior to analyze, first looking for the optimum conditions of experiments had been done. The results showed that the optimum laser energy to the characterization of the elements Ag was 100 mJ and optimum conditions of electric current and time deposition on electrolysis process were 4.93 mA and 10 minutes, respectively. These conditions, next, for the application of quantitative analysis of Ag solution that started from concentration 300 ppm to the lowest concentration and limit of detection obtained 1 ppm.
KARAKTERISASI SPEKTRUM UNSUR Cu UNTUK MENGHITUNG INTENSITAS EMISI ATOM FUNGSI WAKTU TUNDA DENGAN MENGGUNAKAN METODE LASER INDUCED BREAKDOWN SPECTROSCOPY (LIBS) Wulansari Efrilinda Diah; Hery Suyanto; I Nengah Artawan
BULETIN FISIKA Vol 14 No 2 (2013): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Laser-Induced Breakdown Spectroscopy (LIBS) is a spectroscopic method is highly reliable for atomic spectrochemical analysis both qualitatively and quantitatively. To achieve this, be aware of the detection parameters, one of which is a function of the atom emission intensity of detection delay time. In this study, plasma is generated by focusing the Nd-YAG laser (1064 nm, 7 ns) on the surface of solid Cu sample with 99.99% purity level at 1 atm pressure air environment. Plasma emission spectrometer was arrested by elements of Cu + HR 2500 with specifications: (wavelength range 200-870 nm, resolution 0.1 nm (FWHM), 7 detector CCDs with a combined 14.336 pixels) with variation detection delay time 0, 0.5, 1, 1.5, and 2 microseconds after the plasma formation and the energy varies the 60-160mJ. The data showed that the value of the Cu atom emission intensity 521.8 nm of the most highly visible on detection delay time decreased to 0.5 microseconds and detection delay time 2 microseconds. Based on these data it can be concluded that the characterization of the elements Cu to calculate the intensity was in the range of 100-140 mJ laser energy and time delay detection of 0.5 microseconds.
KARAKTERISASI SUHU PEMANASAN SERBUK ZEOLIT UNTUK MENGIMOBILISASI UNSUR PB DALAM LARUTAN DENGAN ANALISIS MENGGUNAKAN LASER INDUCED BREAKDOWN SPECTROSCOPY (LIBS) Aji Priyo Utomo; Hery Suyanto; Wayan Gede Suharta
BULETIN FISIKA Vol 17 No 1 (2016): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A research on the characterization of the heating temperature of the zeolite powder to immobilize Pb element in the solution by using LIBS analysis. This research aims to determine the optimum condition to heated zeolite powder in tho KBr substrate. Zeolite powder have to be to activated with the NaOH 1 M. After been the activation, that powder has been solited in tho Pb solution 1000 ppm and heating until the solution was used up so left the zeolite powder with the Pb element. Then, the powder patched on the KBr and pressed in the pressure 400 kPa so became the pellet. The pellet heated in tho temperature 25oC, 40 oC, 60 oC and 80 oC. After analyzed using LIBS, obtained the optimum temperature to heating the sampel is 60 oC.
KARAKTERISTIK DAN FENOMENA PERUBAHAN KONSENTRASI OKSIGEN DAN NITROGEN DI UDARA DENGAN PROSES LASER-INDUCED BREAKDOWN SPECTROSCOPY (LIBS) Hery Suyanto
BULETIN FISIKA Vol 14 No 1 (2013): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Characteristics and phenomena of hydrogen, oxygen and nitrogen in the air were investigated by Laser-Induced Breakdown Spectroscopy (LIBS). Neutral atomic spectra emission of hydrogen (H I), oxygen (O I) and nitrogen (N I) were analyzed by spectrometer with CCD 14.336 pixel, 200 – 980 nm, resolution of 0.1 nm and delay time detection was set 0 till 4 µs after 100 mJ of laser radiation. The optimum condition for detecting these elements when the delay time detection was between 0.05 – 1 ?s. The data of these elements show the intensity more than 150 a.u, the S/B above of 10 and the FWHM lower than 0.7. The air composition (%), however, was changed compare to the normal condition. Nitrogen was lower than oxygen (N = 39 %, O = 55 %, H = 5 % and 1 % for others gas).
Characterization of Salacca Zalacca for Dye Sensitized Solar Cell (DSSC) Nyoman Wendri; Putu Ekayani Sri Tussniari; Hery Suyanto
BULETIN FISIKA Vol 20 No 2 (2019): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Snake fruit (salacca zalacca) characterization for Dye Sensitized Solar Cell (DSSC) material was conducted using Fourier transform Infrared (FTIR) and Principle Component Analysis (PCA) method. Dragon fruit and mangos teen were used as validator since they are containing anthocyanin. Data shows that snake fruit and mangos teen are in one cluster. Therefore, snake fruit can be used as DSSC material. DSSC fabrication using sandwich method that contains counter electrode, electrolyte and working electrode. The working electrode was made of thin film of titanium dioxide (TiO2) into indium Tin Oxide (ITO) which then was soaked in dye snake fruit as time function of 6, 12 and 24 hours. Result showed that the longer time of soaking, the current and efficient increased. In twenty four hours soaking, the current, voltage and efficiency were 6 mA, 9.16 V and 0.011 % respectively.
PENGARUH LAMA PENYINARAN UV-C PADA BIJI CABAI RAWIT(CAPSICUM FRUSTESCENT L) TERHADAP LAJU PERTUMBUHAN TANAMAN, KADAR KLOROFIL-A DAN KERAPATAN STOMATA DAUN SERTA KADAR KAPSAISIN BUAH CABAI RAWIT R.A Restia Pranagari; Ni Nyoman Rupiasih; Hery Suyanto
BULETIN FISIKA Vol 15 No 2 (2014): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

While irradiation of UV-C light has an effect on plant height, plant growth until the generative phase,chlorophyll-a content, stomatal density and concentration capsaicin chilies. Sample treatment on seeds /seedlings to ultraviolet C radiation (UV-C) respectively for 5 minutes, 15 minutes, 25 minutes, 30 minutes,35 minutes, 50 minutes, 1 hour, 2 hours, 6 hours, 8 hours, 24 hours and 48 hours. The results showed thatthe effect of ultraviolet-C irradiation on seed negative effect on the inhibition of germination of thevegetative phase. While the generative phase, the plant that gets the least amount of UV radiation dosestunted. Ultraviolet radiation on seed very negative effect on the levels of chlorophyll-a. Chlorophyll-alevels were at least 5 minutes in sample treatment (S1). Stomatal density of cayenne pepper plant seedstreated with UV-C irradiation had a greater stomatal density than the untreated plants. Capsaicin levelswhich are most numerous in the old bean chili with UV-C irradiation 2 hours (S8) is an average of 755.17mg / L each of chilies.
Karakterisasi Sampel Kuku Manusia dengan FTIR (Fourier Transform Infrared) melalui Metode Chemometric PCA dan Clustering Shinta Shaleha Juwita; Ni Luh Putu Trisnawati; Hery Suyanto
BULETIN FISIKA Vol 22 No 2 (2021): BULETIN FISIKA August Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2021.v22.i02.p05

Abstract

Research has been carried out on the characterization of human nail samples by FTIR (Fourier Transform Infrared) using Chemometric PCA and Clustering methods. The sample used was left middle fingernail (TTK) from three people from one family (SKR) and two people who were not family (BKR). The test was carried out on TTK nail samples with a mass ratio of TTK nails with KBr 3:1. The results characterization by FTIR showed the presence of functional group O-H, C-H, C=O, N-H, C-N, P=O, C-O-C, nitrate, and nitrite in the TTK nail samples. The results of the analysis using the Chemometric PCA and Clustering methods showed that the TTK nail samples showed similarity in one family. This is based on the similarity of the types of molecules and their absorbance values. In addition, based on the results of PCA loading analysis, the wavenumber identity of the TTK nail samples were found in the range 1597-1479 cm-1.
APLIKASI KARBON GRAFIT UNTUK IMOBILISASI ION PB DALAM CAIRAN DENGAN METODE ELEKTROLISIS Ni Wayan Sariasih; Hery Suyanto; Nyoman Wendri
BULETIN FISIKA Vol 17 No 2 (2016): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to determine the lowest concentration of Pb element that can be immobilized by carbon graphite with electrolysis method. Electrolysis used carbon electrodes of graphite as the anode and cathode with current of 52.7 mA. The concentrations of Pb solution used in this research started from of 100 till 0.1 ppm. Pb element deposited on the cathode then irradiated by Nd - YAG laser ( 1064 nm, pulse width 7 ns ) of 100 mJ and its emission intensity of 405.78 nm was captured by the spectrometer HR 2500+, then the data plotted in intensity as a function of wavelength . The optimum data of charged for the electrolysis process was 80 coulomb and minimum concentration (limit of detection) of Pb that was capable immobilized by carbon graphite was 0,06 ppm.
Co-Authors Aji Priyo Utomo Ayu Anisa Damayanti Dewi Handayani Engelia Rambu Maramba Meha Fiar Tri Santika I G. A. Widagda I Gede Hendrawan I Gusti Agung Ayu Ratnawati I Gusti Bagus Wijaya Kusuma I Nengah Artawan I Putu Tedy Indrayana Ida Ayu Gede Kusuma Dewi Ida Bagus Alit Paramarta Ida Bagus Ketut Yoga Irdhawati Irdhawati K. Suastika Kiichiro Kagawa Kiichiro Kagawa Komang Sugiarta Koo Hendrik Kurniawan Koo Hendrik Kurniawan Made Sumadiyasa Manuntun Manurung Maria Margaretha Suliyanti Maria Margaretha Suliyanti Marincan Pardede Mohamad Infrawan Yulianto Ichwan Mohamad Infrawan Yulianto Ichwan Ni Ketut Esati Ni Luh Putu Mustia Sridewi Ni Luh Putu Trisnawati Ni Nyoman Rupiasih Ni Nyoman, Ratini Ni Wayan Sariasih Nyoman Wendri Putu Edi Yastika Putu Ekayani Sri Tussniari R.A Restia Pranagari Rinda Hedwig Rinda Hedwig Shinta Shaleha Juwita Sinaga Natalia Declarossy Siti Raudatul Jannah Syarifuddin Syarifuddin Tjung Jie Lie Tjung Jie Lie Vincent Milano Wayan Gede Suharta Windarjoto Windarjoto Windarjoto Windarjoto Wulansari Efrilinda Diah