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All Journal Komunikasi Fisika Indonesia Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Teori dan Aplikasi Fisika
Sinta Afria Ningsih
Universitas Riau
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics

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PEMBUATAN ALAT LABORATORIUM UNTUK PRAKTIKUM OPTIK GEOMETRI TINGKAT SMA BERBASIS LASER DIODA Alexander Nasution; Minarni Minarni; Rakhmawati Farma; Sinta Afria Ningsih
Komunikasi Fisika Indonesia Vol 18, No 2 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.2.137-145

Abstract

Peningkatan literasi sains siswa Indonesia membutuhkan metode pembelajaran yang standar, salah satunya mengunakan metode pembelajaran dengan alat demo atau alat laboratorium. Namun penyediaan alat tersebut oleh sekolah belum optimal karena pendanaan yang kurang. pelajaran Fisika tingkat SMA khususnya kelas X atau XI membahas tentang optik geometri. Kit alat optik geometri yang ekonomis diperlukan untuk menunjang hasil belajar siswa pada materi tesebut. Penelitian ini bertujuan untuk membuat kit optik geometri yang ekonomis dan sederhana berbasis laser untuk percobaan optik geometri. Kit tersebut yang terdiri dari laser dioda dengan panjang gelombang 650 nm dan daya 5 mW, tangki pembiasan akrilik, skala sudut berbentuk melingkar. Percobaan yang dilakukan adalah pengunaan Hukum Snelius pada medium udara-air, menentukan indek bias cairan, dan sudut kritis. Pada penelitian ini, modul percobaan digunakan pada siswa MAN 1 Padang Lawas, Kecamatan Barumun, Sumatera Utara. Beberapa uji yang dilakukan yaitu uji kelayakan alat, uji praktikalita kit optik geometri, dan uji efektifitas penggunaan Kit Terhadap Hasil Belajar Siswa Kelas X. Hasil rata-rata semua aspek uji kelayakan menghasilkan skor 96,25%. Hasil uji praktikalitas adalah 85,00 %. Untuk uji efektifitas penggunaan kit adanya perbedaan hasil pre-test dan post-test pada kelas eksperimen dan kelas kontrol dimana pada kelas eksperimen rata-rata nilai siswa dari 32,83 pada saat pre-test menjadi 73 setelah post-test, sementara hasil pre-test kelas kontrol dari rata-rata 31,83 menjadi 68 setelah dilakukan post-test
PENGUNAAN PENCITRAAN MULTISPEKTRAL PADA PANJANG GELOMBANG 520 NM DAN 800 NM UNTUK MENGEVALUASI TINGKAT KEMATANGAN TBS KELAPA SAWIT Sinta Afria Ningsih; Minarni Shiddiq; Dodi Sofyan Arief; Ikhsan Rahman Husein
Komunikasi Fisika Indonesia Vol 17, No 3 (2020)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.17.3.144-149

Abstract

Oil palm fresh fruit brunch (FFB) are the main source of crude palm oil (CPO). Sorting and grading FFB are important in order to obtain high quality CPO. Multispecral imaging has been purposed to be implemented in high speed sorting machines due to less wavelength bandwidths used hence less processing time. This study was aimed to evaluate the ripeness levels of oil palm FFB based on relative reflectance intensity and fruit firmness. Multispectral images were acquired using two bandpass filters mounted in a filter wheel with wavelengths of 520 nm and 800 nm respectively. The image acquisition and processing were controlled using python based program. The samples consisted of 30 oil palm FFBs of Tenera varieties with three ripeness levels as unripe, ripe, and overripe. The result showed that the relatif reflectance intensity at wavelength of 520 nm is inversely proportional to the maturity level, on the other hand,  relatif reflectance intensity at wavelength of 800 nm is directly proportional to the maturity level. The relation between the firmness and ripeness level are inversely proportional. Relative reflectance intensity of the multispectral images at the wavelength of 800 nm had a better correlation to the palm fruit firmness than the image at the wavelength of 520 nm with the correlation coefficient (r) of -0.0198 at 520 nm and -0.8594 at 800 nm. it can be shown that the multispectral imaging is potensial to be implemented for FFB ripeness evaluation.
HIDUNG ELEKTRONIK BERBASIS SENSOR GAS MOS UNTUK KARAKTERISASI KEMATANGAN BUAH KELAPA SAWIT Minarni Shiddiq; Lentina Br Sitohang; Ikhsan Rahman Husein; Sinta Afria Ningsih; Sri Hermonica; Annisa Fadillah
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 10, No 2 (2021): Juni
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v10i2.170-182

Abstract

The ripeness of oil palm fruits is one of the key factors for crude palm oil qualities. Recently, electronic nose systems have been developed intensively for fruit quality assessment which relates odors to ripeness levels. This study developed an electronic nose system to characterize the ripeness levels of oil palm fruits using output voltage of each sensor and fruit hardness. The system consisted of a sensor chamber and a sample chamber. The sensor chamber consisted of eight MOS gas sensor modules of MQ series. Samples were oil palm fruits taken from oil palm fresh fruit bunches (FFB) which were previously categorized traditionally into unripe, ripe, over ripe, peeled and put into the sample chamber. Some of the fruits were also used for hardness measurement. To quantify the output voltages for each sensor, integrated trapezoid areas were calculated and related to the fruit hardness values. The results showed a significant voltage difference of each sensor for the three ripeness levels. Only four out of eight sensors showed significantly higher voltages. Three sensors which can significantly differentiate the ripeness levels are MQ3, MQ5, and MQ135 which MQ135 is the best. This shows that the electronic nose is potential for oil palm fruits. Keywords: electronic nose, fruit hardness, MOS gas sensor, oil palm fruit, ripeness
Rancang Bangun Sistem Hidung Elektronik Berbasis Sensor Gas MQ untuk Mengevaluasi Kualitas Madu Minarni Shiddiq; Annisa Fadlillah; Sinta Afria Ningsih; Ikhsan Raahaman Husein
Jurnal Teori dan Aplikasi Fisika Vol 9, No 2 (2021): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v9i2.2722

Abstract

Honeys come in many varieties based on quality attributes and region origin. Electronic nose systems have been adopted and used to classify honey types based on physicochemical parameters. This study was aimed to build a low cost  electronic nose (e-nose) based on metal oxide semiconductor (MOS) gas sensors, and then used to evaluate the qualities of two types of honeys and one non honey based on sugar contents and pH values. Six gas sensors of MQ modules namely MQ2, MQ3, MQ4, MQ5, MQ6, MQ9, and an Arduino microcontroller were used in this system.  Software of Arduino IDE, PLX-DAQ, and Python were applied to record output voltages of each sensor, saved in Excel format, and to calculate trapezoid areas respectively. Honey samples were named as A, B, and C which were. a national brand honey, a local forest honey, and date syrup respectively. The results show higher output voltages for MQ 3, MQ 4, and MQ 6 sensors. The six sensors are able to differentiate between the two honey types and non honey. Sample A has the highest trapezoid area while sample C has the lowest area. This could be caused by higher pH value of sample C.
Co-Authors Alexander Nasution Annisa Fadillah Annisa Fadlillah Dodi Sofyan Arief Ikhsan Raahaman Husein Ikhsan Rahman Husein Lentina Br Sitohang Minarni Minarni Rakhmawati Farma Sri Hermonica