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Pengembangan Model Jaringan Syaraf Tiruan untuk Penentuan Kandungan Kimia Biji Kopi Arabika Gayo dengan NIRS Hafiz Fajrin Aditama; I Wayan Budiastra; Slamet Widodo
Warta Industri Hasil Pertanian Vol 36, No 1 (2019)
Publisher : Balai Besar Industri Agro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (890.399 KB) | DOI: 10.32765/warta ihp.v36i1.4767

Abstract

Penelitian ini bertujuan untuk mengembangkan model jaringan syaraf tiruan (JST) terbaik untuk memprediksi kandungan kimia biji kopi arabika Gayo dan memvalidasi model. Data input yang digunakan adalah data principal component (PC) spektra yang terlebih dahulu telah dilakukan pre-treatment data menggunakan multiplicative scatter correction (MSC), Normalisasi (N-1,1), dan turunan pertama Savitzky-Golay (dg1). Model JST menggunakan Multilayer Perceptron (MLP) feed forward neural network dengan algoritma pelatihan dasar Levenberg-Marquard. Penggunaan 10 jumlah neuron lapisan tersembunyi sudah cukup untuk dapat memprediksi kandungan kimia biji kopi Gayo. Kadar air dapat diprediksi dengan model JST menggunakan 8 jumlah PC dan normalisasi (r = 0,96; CV = 1,77%; RPD = 3,79). Kafein dapat diprediksi dengan 8 jumlah PC dan kombinasi normalisasi dengan dg1 (r = 0,98; CV = 2,15%; RPD = 4,44). Karbohidrat dapat diprediksi dengan menggunakan 5 jumlah PC dan dg1 (r = 0,99; CV = 0,27%; RPD = 9,55). Lemak dapat diprediksi dengan menggunakan 8 jumlah PC dan kombinasi MSC dengan dg1 (r = 1; CV = 0,41%; RPD = 19,11). Protein dapat diprediksi dengan menggunakan 5 jumlah PC dan kombinasi MSC dengan dg1 (r = 0,99; CV = 0,84%; RPD = 7,08). 
Pemodelan Citra Akuifer Menggunakan Metode Geolistrik Jeris Habfrons Wiatri Djereng; I Nengah Simpen; I Wayan Gede Suharta
BULETIN FISIKA Vol 18 No 2 (2017): 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

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Abstract

Has been done research on modeling the image of the aquifer using geoelectric method. This research was conducted on 7 conditions by taking one data at each condition there is condition without being given a model, model conditions flats have not given water and by water, aquifer conditions concave not given water and by water, and aquifer conditions veined not given water and by water this so can get to see the image data inversion results of resistivity using Res2dinv. Modeling the aquifer flat using geoelectric method obtained the image in the form of layers of images with different colors in which this is due to the material composition and water content are different. Modeling the concave aquifer using geoelectric obtained the aquifer at a depth of 15-30 cm with blue color because in this area the water content is more than other areas. Modeling a branched aquifer using geoelectric method obtained the image in the form of two points aquifer detached in blue, this is two water sources. In the image modeling of aquifers using geoelectric method the resistivity value lower aquifer region compared to other regions as indicated by the color of light blue until dark.
Menentukan Posisi Pengeboran Untuk Mendapatkan Air Yang Berkualitas Di Jalan Tunjung I Denpasar Barat Dengan Metode Geolistrik I Kadek Suardika; I Nengah Simpen; I Wayan Redana
BULETIN FISIKA Vol 18 No 2 (2017): 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

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Abstract

Investigation has been conducted on drilling point position to get clean water at Jalan Tunjung 1 Denpasar Barat. The investigation was carried out by geoelectric method using the Wenner configuration. The measurement data is processed by using Res2dev Software. From the resistivity data processing results obtained that the best position to get quality water is at position 8º33'43,76 "LS and 115º21'00,06" BT. The position of the aquifer lies at a depth of 16.25 meters. Laboratory test results for several parameters relating to water quality show values that meet the quality standard threshold in accordance with the provisions of Bali's Governor Regulation no. 8 Year 2007.
Pendugaan Kandungan Kafein Biji Kopi Liberika dengan Spektroskopi NIR Menggunakan Model Kubelka-Munk Ei Mon Kyaw; I Wayan Budiastra; Sutrisno Sutrisno; Samsudin Samsudin; Dheni Mita Mala
Jurnal Tanaman Industri dan Penyegar Vol 7, No 3 (2020): Jurnal Tanaman Industri dan Penyegar
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jtidp.v7n3.2020.p119-126

Abstract

Liberica is one of coffee species that is becoming popular and increasingly in demand in present days due to its unique characteristics. Caffeine is one of the important coffee quality parameter which determines the coffee flavor, consumer preference and market price. Caffeine content is usually analyzed by chemical method which is destructive, time consuming, expensive and involving a lot of procedures. NIR Spectroscopy is one of the non-destructive techniques to overcome these disadvantages. This study was conducted at the Department of Mechanical and Biosystem Engineering, IPB University for NIR measurement and the Center of Agro-based Industry (BBIA), Bogor for chemical analysis from August to November 2019. The study aimed to determine the best calibration model for the prediction of caffeine content in Liberica coffee green bean powder. In this study, FT-NIRS in the wavelength of 1000-2500 nm was used for NIR measurement and HPLC tool was used for chemical analysis. Kubelka-Munk (K/S) and Absorbance (Log 1/R) were used as data transformation, whereas Standard Normal Variance (SNV) and Second derivative of Savitzky-Golay (dg2) as data pretreatment. In addition, Partial Least Square (PLS) and Multiple Linear Regression (MLR) were applied for multivariate calibration method. The best calibration model for the prediction of caffeine content of Liberica coffee green bean powder was obtained by the spectral data pretreated with second derivative of Savitzky-Golay (dg2) and Kubelka-Munk data transformation using PLS calibration method with the results of r = 0.90, RPD = 2.24, CV = 2.01%.
The Influence of Position of Durian in Determination of Ripeness of Durian Non-Destrucyively by Ultrasonic Wave Bambang Haryanto; I Wayan Budiastra; Amoranto Trisnobudi
Jurnal Keteknikan Pertanian Vol. 14 No. 1 (2000): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.014.1.%p

Abstract

The study was conducted to assess the influence of durian 's position toward transmission properties of ultrasonic wave for determination of the fruit ripeness using non-destructiive technique. Three ripe and unripe durian were used to assess transmittance wave that was passed the durian. The measurement was conducted at 3 peak and valley positions and it was repeated 20 times. The result showed that position durian 's inJluenccad thetransmissions of ultrasonic wave. Mo mzJ a (attenuation) values can be used as indicator for durian ripeness. Ripe durian tends to have highera value than unripe durian.
Study on the Storage Characteristics of Minimally Processed of Oranges (Citrus grandis L.) Under Modified Packaging . Saputera; . Sutrisno; Slamet Susanto; I Wayan Budiastra
Jurnal Keteknikan Pertanian Vol. 14 No. 1 (2000): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.014.1.%p

Abstract

Orange (Citrus grandis L.) is one of horticulture commodity which is consummed because of its delicious taste and plenty vitamins and minerals that is required by the humm body. The respiration rate of the minimally processed of orange at 10, 15 and 27.5 OC were 8.10, 13.24 and 28.212 ml/kg. h, re.jp,pectivily. The respiration rate of whole (unpeeled) orange at the same storage temperature were 10.15, 19.13 and 42.28 ml/kg. h, respectivily.
Studyon Characteristics and Shelf Life Prediction of Cashew Appels Using Modified Atmosphere Packaging System La Rianda; . Sutrisno; Rizal Syarief; I Wayan Budiastra
Jurnal Keteknikan Pertanian Vol. 14 No. 1 (2000): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.014.1.%p

Abstract

The aims of this research are: I) to identzJL the changes ofphysiologic characteristics of cashew apples during storage under MAP system; 2) to verzfv the changes of their quality during storage; and 3) to establish the optimum gaseous compotition range in the MAS system. To completed the research, the experimen was conducted by four steps activities as follows: I) the measurement of respiration rate; 2) establishment of the range of modijied atmosphere storage for cashew uppels; 3) cojitputingthe packaging area and selecting the kind of plastic film; 4) prediction of shelf lge for cashew appels during srorage under MAP system.
Karakteristik Transmisi Gelombang Ultrasonik dan Hubungannya dengan Sifat Fisiko-Kimia Buah Naga Siti Djamila; I Wayan Budiastra; Sutrisno .
Jurnal Keteknikan Pertanian Vol. 24 No. 1 (2010): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.024.1.%p

Abstract

AbstractCommonly the quality of dragon fruit in Indonesia is determined manually by using visual appearances and it gives un-uniformly results caused by human factors and the judgement is not reflected the internal quality of dragon fruit. Destructive method is usually used to determine the internal quality of dragon fruit that is unsuitable for quality control of fresh dragon fruit.  So a non destructive method is required for evaluation the quality of dragon fruit. The objectives of the research were to determine the physico-chemical and ultrasound wave transmission characteristics of super red dragon fruit according to harvesting time, and to study the relationship between ultrasound wave transmission characteristics and physico-chemical characteristics of super red dragon fruit. Super-red dragon fruits were harvested at 30, 32, and 34 days after flower blooms (150 samples) from PT Wahana Cory, Ciapus, Bogor. The results showed that the ultrasound velocity of super red dragon fruit ranged from 614.10 to 680.16  m/s and  the attenuation coefficient were 57.32 to 62.40 Neper per meter. The attenuation coefficient was significantly different according to maturity.  There were significant correlations between ultrasound parameters (velocity and attenuation coefficient) and physico-chemical of super red dragon fruit (firmness, sugar content, total soluble solid, and total acid).Keyword: dragon fruit, attenuation, ultrasound, velocity Diterima: 25 September 2009; Disetujui: 3 Februari 2010 
Non Destructive Inner Quality Prediction In Intact Mango With Near Infrared Reflectance Spectroscopy Agus A Munawar; I Wayan Budiastra
Jurnal Keteknikan Pertanian Vol. 23 No. 1 (2009): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.023.1.%p

Abstract

Two major parameters which determine inner quality and the taste of mango, total soluble solids (TSS) and firmness, are still determined destructively. To evaluate the feasibility of near infrared reflectance spectroscopy (NIRS) technique in determining total soluble solids (TSS) contents and firmness in intact mango, diffuse reflectance (R) spectra were measured in the spectral range from 900 to 1400 nm. Calibration models using R and log (1/R) were established by stepwise multiple linear regression with k-fold leave oneout (LOO) cross validation. The correlation coefficients (r) of calibrations ranged from 0.89 to 0.96 with SEC values 0.46 to 1.08. Both TSS and firmness were predicted accurately using log (1/R) spectra.Keywords: mango, NIRS, firmness, TSS, non-destructiveDiterima: 8 Juni 2008; Disetujui: 31 Januari 2009
Penentuan Pola Peningkatan Kekerasan Kulit Buah Manggis Selama Penyimpanan Dingin Dengan Metode NIR Spectroscopy Dwi Dian Novita; Usman Ahmad; Sutrisno .; I Wayan Budiastra
Jurnal Keteknikan Pertanian Vol. 25 No. 1 (2011): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (800.917 KB) | DOI: 10.19028/jtep.025.1.%p

Abstract

Abstract Pericarp hardening of mangosteen fruit has correlation with the decrease in moisture content due to transpiration and respiration during storage.  The change of pericarp moisture content during storage may be determined nondestructively using near infrared (NIR) spectroscopy. The objectives of this study were to build calibration model of NIR reflectance to predict the moisture content of the pericarp, and to determine the pattern of pericarp hardening based on change of moisture content during storage using NIR reflectance. NIR reflectance spectra were obtained from fruits stored at 8ºC, 13ºC, and room temperature.  Calibrations were built using partial least squares (PLS) and artificial neural network (ANN) models.  Results of analysis indicated that pericarp moisture content could be predicted well by NIR reflectance using the calibration model of PLS for mangosteen stored at 8ºC, 13ºC, and room temperature. The pattern of pericarp hardening based on change of moisture content also could be determined using NIR reflectance for mangosteen stored at 13ºC and room temperature. Keywords : mangosteen fruit, pericarp hardening, moisture content NIR spectroscopy, PLS, ANN Abstrak Pengerasan kulit buah manggis memiliki korelasi dengan penurunan kadar air kulit buah akibat dari proses transpirasi dan respirasi buah selama penyimpanan. Perubahan kadar air kulit buah selama penyimpanan bisa ditentukan secara non-destutive dengan menggunakan near infrared (NIR) spectroscopy. Tujuan penelitian ini adalah menyusun model kalibrasi reflektan NIR untuk memprediksi kadar air kulit buah manggis, serta untuk menentukan model pengerasan kulit buah berdasarkan perubahan kadar air selama penyimpanan menggunakan reflektan NIR. Spektra reflektan NIR diambil dari buah manggis yang disimpan pada suhu 8oC, 13oC dan suhu ruang. Kalibrasi dibangun dengan menggunakan model partial least squares (PLS) dan artificial neural network (ANN). Hasil analisis mengindikasikan bahwa kadar air kulit buah dapat diprediksi secara baik dengan reflektan NIR menggunakan model kalibrasi PLS untuk buah manggis yang disimpan pada suhu 8oC, 13oC dan suhu ruang. Model pengerasan kulit buah berdasarkan perubahan kadar airnya juga dapat ditentukan dengan reflektan NIR untuk buah manggis yang disimpan pada suhu 13oC dan suhu ruang. Kata kunci : buah manggis, pengerasan kulit, NIR spectroscopy, PLS, ANNDiterima: 19 Oktober 2010; Disetujui: 10 Maret 2011  
Co-Authors . Saputera . Sutrisno A. Trisnobudi Agus A Munawar Ahmuhardi Abdul Azis Alla Asmara Amin Rejo Amoranto Trisnobudi Anggie Yulia Sari Aris Purwanto Aryanis Mutia Zahra Baihaqi Baihaqi Bambang Haryanto Bambang Haryanto Bambang Haryanto Bambang Haryanto BAMBANG S. PURWOKO Bambang S. Purwoko Bambang Soenarto Baskoro Wicaksono, Baskoro Deva Primadia Dheni Mita Mala Dwi Dian Novita Ei Mon Kyaw Elizabeth Sonya Lumbantoruan Emmy Darmawati Fadfhillah, Dini Nur Fadhillah, Dini Nur Fila Rodotul Jannah Fiona Hanberia Innayah Hadi K. Purwadaria Hadi K. Purwadaria Hadi K. Purwadaria Hafiz Fajrin Aditama Harmi Andrianyta Herna Permata Sari I Kadek Suardika I M. S. Wibawa I NYOMAN SUTARPA SUTAMA I Wayan Redana Ida Bagus Made Suryatika Indah Kurniasari Irawaty Irawaty Jajang Juansah Jajang Juansah Jati Sumarto Putro Jeris Habfrons Wiatri Djereng Ketut Agus Karmadi KUDANG B. SEMINAR La Rianda LADY C. E. CH. LENGKEY Lady Lengkey Lalu Hendri Setiawan Mar'atus Sholihah Mawiti Infantri Mawiti Infantri Yekti Ni Nyoman, Ratini Noneng Fahri Novi Andareswari Noviar Harun Nur Arifiya Ocarina, Estika Parida, Desca Putu Doddy Heka Ardana Rini Rosita Rizal Syarief Rizky Wiradinata Rokhani Hasbullah Ruri Wijayanti Samsudin Samsudin SEDARNAWATI YASNI Semin Semin Sigid Hariyadi Siti Djamila Siti Zulaikah Slamet Susanto Slamet Widodo Slamet Widodo Sobir Sobir Sri Agustina Sri Citra Yuliana Madi Sugiyono . Sugiyono Sugiyono Sukrisno Widyotomo Suroso . Suroso . Suroso Suroso Sut risno Sutrisno - Sutrisno . Sutrisno Mardjan Sutrisno Sutrisno Tarisa Fadillah Titis Priyowidodo Trisma Rezeki Zairisman Usman Ahmad Vita N. Lawalata Wayan Gede Suharta Wendianing Putri Luketsi Wiranda G. Piliang Yasin, Yasnita Yul Y Nazaruddin Yunisa Tri Suci