Article Per Year (5 Year)
p-Index From 2019 - 2024
1.066
P-Index
This Author published in this journals
All Journal JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Journal of Science and Applicative Technology JURNAL INTEGRASI Jurnal Teori dan Aplikasi Fisika Jurnal Fisika Indonesia
Okky Fajar Tri Maryana
Departemen Fisika, Institut Teknologi Bandung
Astronomy Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Other

Published : 7 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 7 Documents
Search

 1 
Pengaruh Molaritas dalam Teknik Spray terhadap Performa Fotodetektor Berbasis ZnO Okky Fajar Tri Maryana; Anisa Fitri; Mohamad Samsul Anrokhi; Wahyu Solafide Sipatuhar; Eka Nurfani
Jurnal Teori dan Aplikasi Fisika Vol 9, No 1 (2021): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v9i1.2706

Abstract

ZnO:Fe thin films has been successfully carried out by a simple spray pyrolysis method. The thin film was grown on ITO (Indium Tin Oxide) substrate with a metal-semiconductor-metal (MSM) structure. ZnO:Fe thin film characters as photodetector application include morphological structure, and electrical properties. SEM image results show the molarity difference can affect the particle size. The Current-Voltage (I-V) characterization shows that different solvent effects and molarity give different sensitivity. Sample ZnO:Fe 0.5M Ethanol has the highest sensitivity compared to other samples because it has a fairly low current and high bright current.
Banner waste mixture: The impact on quality of traditional brick’s compressive strength Okky Fajar Tri Maryana; Rifqi Ikhwanuddin; Safitri Anggini; Ridho Barna
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 9, No 2 (2020): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (505.321 KB) | DOI: 10.24042/jipfalbiruni.v9i2.5418

Abstract

The regional election in Lampung province has finished. The events left the amount of ex-campaign props such as banner to become waste. The final landfills and the waste reuse system are still an unsolved issue in Lampung province. A study of materials composition is required to find potential reuse of the waste. One of the traditional products in Lampung province is conventional bricks. Previous studies show that mixing local clay with additional materials such as Rice Husk Ash (RHA) could improve its characteristics, especially water absorption potentiality. This study reported the prototype of bricks with banners waste mix produced employing a conventional method. The method obtains the best admixture composition is 0.002 kilograms banner waste/volume 0.125 liters or 0.02% total weight of clay-dough. The morphology of the prototype shows a similar texture with a non-waste mixture of traditional brick. It is burnt-clay red-bricks, which is used as a control in this study. The prototype bricks show smooth texture and nearly flat on all sides. The addition waste composition ratio of more than 0.002 kilograms indicated cracking texture that affects the market tend to buy bricks, which has good appearance and texture. This study also reported that the mixture's effect is decreasing compressive strength, almost 20% from the control sample.
Pengaruh Intensitas Cahaya terhadap Efisiensi Konversi Sel Surya Berbasis Dye-Sensitized Solar Cell (DSSC) Muhammad Arifin; Desyana Olenka Margareta; Okky Fajar Trimaryana
JURNAL INTEGRASI Vol 9 No 1 (2017): Jurnal Integrasi - April 2017
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v9i1.246

Abstract

Perubahan penggunaan sumber energi tak terbaharui menuju sumber energi yang terbaharui akhir-akhir ini perlu dilakukan. Salah satu sumber energi terbarukan dan melimpah di alam adalah sinar matahari. Sinar matahari ini dapat dikonversi menjadi listrik menggunakan sel surya. Dye Sensitized Solar Cell (DSSC) merupakan jenis sel surya generasi ketiga. Sel surya ini memberikan efisiensi tinggi dan harganya yang murah. Untuk mengoptimalisasi efisiensi tersebut perlu dilakukan variasi intensitas cahaya yang mengenai sel surya DSSC. Pengujian dilakukan dengan menggunakan set alat monokromator dan I-V meter yang dijalankan dengan bantuan LabView Software. Hasil pengujian menunjukkan bahwa efisiensi konversi sel surya DSSC paling tinggi adalah 0,85 % pada intensitas cahaya 30 mW/cm2 untuk rentang intensitas cahaya dari 10 – 50 mW/cm2.
Studi Properti Fisis dan Mekanis Bata Bakar Merah dengan Aditif Limbah Vinyl dan Abu Sekam Padi Rifqi Ikhwanuddin; Okky Fajar Tri Maryana
Jurnal Fisika Indonesia Vol 24, No 3 (2020)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfi.v24i3.57187

Abstract

Bata diproses dengan campuran tanah liat dan air kemudian dibakar pada temperatur dan durasi tertentu. Adapun mencampur tanah liat dengan bahan limbah atau sampah diduga dapat mengubah sifat produk bata, khususnya terhadap daya serap air dan kekuatan mekanis. Bahan sampah yang potensial dapat dijumpai mudah dari bahan periklanan (spanduk vinyl). Tujuan studi ini untuk menginvestigasi potensi dan pengaruh yang ditimbulkan dari campuran bata dengan limbah spanduk berbahan vinyl serta abu sekam padi. Purwarupa bata merah bakar (B1 dan B2) dibentuk secara manual menggunakan cetakan. Pengukuran dilakukan untuk mengetahui daya serap air, kerapatan semu, serta kekuatannya. Hasilnya, bata yang mengandung limbah menyerap terlalu banyak air dibandingkan yang direkomendasikan oleh SNI 15-2094-2000, seluruh model menyerap air lebih dari 20%. Durasi uji daya serap air divariasikan dengan 1 menit, 5 menit, dan 24 jam untuk menonjolkan saturasi. Kerapatan semu model B1 dan B2 masing-masing ialah 0,80 dan 0,69 gr/cm3 yang berada di bawah standar (1,2 gr/cm3). Hasil uji kekuatan untuk seluruh model kurang memuaskan yaitu B1strength=31,86 kg/cm2 dan B2strength=25,51 kg/cm2, sementara standar kekuatan yang direkomendasikan sebaiknya bernilai di atas 60 kg/cm2.
Potensi Cahaya Laser sebagai Sensor Kadar Asam Lemak Jenuh pada Minyak Jelantah Nike Dwi Grevika Drantantiyas; Okky Fajar Tri Maryana; Idra Herlina; Prio Santoso
Jurnal Fisika Indonesia Vol 24, No 3 (2020)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfi.v24i3.57418

Abstract

Penelitian ini bertujuan untuk menentukan panjang gelombang cahaya yang selektif sebagai sensor kadar asam lemak pada minyak jelantah. Minyak jelantah diperoleh dari limbah konsumsi rumah tangga dan pedagang kaki lima. Sampel minyak jelantah terbagi menjadi jumlah konsumsi yaitu 3 kali pengunaan, 6 kali penggunaan dan 9 kali penggunaan. Detektor cahaya yang digunakan adalah light dependent resistance yang dikendalikan oleh Arduino. Sumebr cahaya adalah laser dengan tiga panjang gelombang yaitu merah, hijau dan biru. Hasil yang diperoleh adalah perbedaan besar resisitansi antara cahaya yang melewati material dan cahaya tanpa melewai material. Berdasarkan hasil, akan dijelaskan interaksi cahaya yang melewati minyak jelantah dan panjang gelombang cahaya. Kadar asam lemak bebas pada minyak jelantah diukur dengan uji asam lemak bebas laboratorium. Berdasarkan kedua hasil pengukuran akan dikonversikan sehingga mendapat model sistem pengukuran. Berdasarkan model tersebut, panjang gelombang biru lebih sensitif sebagai sensor daripada panjang gelombang merah dan hijau.
Eksperimen Gangguan Getaran Pada Fenomena Cloaking Cahaya Tampak Sistem Empat Lensa Okky Fajar Tri Maryana; L. Y. Ginting; F. Pahlawan; M. Y. Darmawan
Journal of Science and Applicative Technology Vol 3 No 2 (2019): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1352.432 KB) | DOI: 10.35472/jsat.v3i2.213

Abstract

Creating optical illusions or invisible objects by using cloaking devices is still being a concern for many researchers in the world. The cloaking devices are working in visible spectrum regime, large dimention, and replicable. Addition with the full-field of light, no new materials, simple infrastructure, and scale easily may be considered an ‘ideal’ cloaking device. Based on four lenses cloaking system by Choi’s work shows an idea for solution of blindspot large vehicle’s problem. The set up for this optical system is regular covex lenses non-aberation based on educational laboratory framework. The experimental confirmation that cloaking area with 4f convex lenses is limited to certain areas only, not 100 % of the object to be observed can disappear from the view. Vibration disturbance generated by rotor module (wheels disturbance analogy on vehicles) applied on the system demonstrate that below on 2000 rotation per minutes (rpm) equal 33.34 hertz, optical illusion is still consistent. The results support the information to create optical cloaking prototype for optimizing large vehicle driver’s visibility as alternative solution blindspot’s problem.
Banner waste mixture: The impact on quality of traditional brick’s compressive strength Okky Fajar Tri Maryana; Rifqi Ikhwanuddin; Safitri Anggini; Ridho Barna
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 9, No 2 (2020): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v9i2.5418

Abstract

The regional election in Lampung province has finished. The events left the amount of ex-campaign props such as banner to become waste. The final landfills and the waste reuse system are still an unsolved issue in Lampung province. A study of materials composition is required to find potential reuse of the waste. One of the traditional products in Lampung province is conventional bricks. Previous studies show that mixing local clay with additional materials such as Rice Husk Ash (RHA) could improve its characteristics, especially water absorption potentiality. This study reported the prototype of bricks with banners waste mix produced employing a conventional method. The method obtains the best admixture composition is 0.002 kilograms banner waste/volume 0.125 liters or 0.02% total weight of clay-dough. The morphology of the prototype shows a similar texture with a non-waste mixture of traditional brick. It is burnt-clay red-bricks, which is used as a control in this study. The prototype bricks show smooth texture and nearly flat on all sides. The addition waste composition ratio of more than 0.002 kilograms indicated cracking texture that affects the market tend to buy bricks, which has good appearance and texture. This study also reported that the mixture's effect is decreasing compressive strength, almost 20% from the control sample.
Co-Authors Anisa Fitri Anrokhi, Mohamad Samsul Desyana Olenka Margareta Eka Nurfani F. Pahlawan Idra Herlina L. Y. Ginting M. Y. Darmawan Muhammad Arifin Nike Dwi Grevika Drantantiyas Prio Santoso Ridho Barna Rifqi Ikhwanuddin Safitri Anggini Sipahutar, Wahyu Solafide