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All Journal RADIASI: Jurnal Berkala Pendidikan Fisika BERKALA FISIKA EDUSAINS TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Fibusi (Jurnal Online Fisika) Jurnal Matematika & Sains JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Indonesian Journal of Science and Technology Phenomenon : Jurnal Pendidikan MIPA Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Journal of Teaching and Learning Physics JIPF (Jurnal Ilmu Pendidikan Fisika) JTERA (Jurnal Teknologi Rekayasa) Spektra: Jurnal Fisika dan Aplikasinya Jurnal Elektronika dan Telekomunikasi Jurnal Pendidikan Fisika dan Sains (JPFS) ABDI MOESTOPO: Jurnal Pengabdian pada Masyarakat Online Learning in Educational Research PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Indonesian Journal of Physics (IJP) Wahana Fisika : Jurnal Fisika dan Terapannya Jurnal Pendidikan MIPA IJIS Edu : Indonesian Journal of Integrated Science Education
Lilik Hasanah
Universitas Pendidikan Indonesia
Aerospace Engineering Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Electron Transmittance through a Heterostructure on Anisotropic Materials using the Airy Function and the Transfer Matrix Method Lilik Hasanah; Adi Bagus Suryamas; Khairurrijal Khairurrijal; Mikrajuddin Abdullah; Toto Winata; Sukirno Sukirno
Indonesian Journal of Physics Vol 18 No 4 (2007): Vol. 18 No. 4, October 2007
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (295.701 KB)

Abstract

Derivation of the transmittance of an electron incident on a heterostructure potential with nanometer-thick trapezoidal barrier grown on anisotropic materials is done by solving the effective-mass equation including off-diagonal effective-mass tensor elements. The analytic expressions are applied to the Si(110)/Si0.5Ge0.5/Si(110) heterostructure. It is assumed that the direction of propagation of the electrons makes an arbitrary angle with respect to the interfaces of the heterostructure and the effective mass of the electron is position dependent. The calculation of transmittances is done for incident energy at z direction below and above the barrier height by varying the applied voltage to the barrier. The maximum transmittance depends on the incident energy and the bias voltage given to the potential barrier. The transmittance value obtained from the Airy function has the same value obtained from the transfer matrix method. It was also found that the transmittance depends on the valley and it is not symmetric with the incident angle.
Biomass-Based Supercapacitors Electrodes for Electrical Energy Storage Systems Activated Using Chemical Activation Method: A Literature Review and Bibliometric Analysis Ida Hamidah; Ramdhani Ramdhani; Apri Wiyono; Budi Mulyanti; Roer Eka Pawinanto; Lilik Hasanah; Markus Diantoro; Brian Yuliarto; Jumril Yunas; Andrivo Rusydi
Indonesian Journal of Science and Technology Vol 8, No 3 (2023): (ONLINE FIRST) IJOST: December 2023
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v8i3.60688

Abstract

Currently, carbon derived from biomass waste or residues is being intensively utilized as electrodes due to its excellent electrical properties, including high conductivity, appropriate porosity, and a specific surface area suitable for supercapacitor applications. Despite its advantages, the performance of supercapacitors made from biomass-derived carbon is insufficient for engineering applications because of the challenges in obtaining the mesoporous structure of activated carbon (AC). Therefore, this study highlights the potential of biomass-based carbon as the electrodes of a highly efficient supercapacitor, which can facilitate highly efficient current transport in energy storage systems. It comprehensively discusses various biomass material sources and activation methods to produce carbon, with a focus on the physical and electrical properties. Initially, the study discusses carbon activation methods and mechanisms to understand why activating agents and electrolyte solutions have a high specific surface area and specific capacitance. It then concentrates on the chemical activation method and its importance in making AC useful as an efficient electrode. Finally, in this study, various biomass sources were discussed to highlight the performance of supercapacitors electrodes originating from agricultural and wood residues relating to the specific capacitance and capacitance retention. Based on the obtained results, it is concluded that biomass-based carbon materials could be the most advantageous platform material for energy conversion and storage.
Optimasi dan Analisis Desain 3-D Piezoelectric Micropump pada Laju Aliran Fluida Nada Sadidah; Lilik Hasanah; Naftalia Trivenia Simbolon; Roer Eka Pawinanto; Chandra Wulandari; Budi Mulyanti; Ahmad Aminudin
Wahana Fisika Vol 7, No 1 (2022): June
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v7i1.43125

Abstract

Micropump adalah komponen penting dalam sistem mikrofluida dan digunakan untuk mengontrol jumlah cairan yang tepat dalam ukuran mikroliter hingga nanoliter. Penelitian ini bertujuan mengoptimasi desain 3-D micropump yang menggunakan aktuator piezoelektrik. Metode yang digunakan dalam penelitian ini adalah metode simulasi dengan perangkat lunak COMSOL Multiphysics 5.6. Micropump dianalisis dengan memvariasikan radius inlet dan outlet, tegangan penggerak, serta frekuensi kerja untuk menemukan laju aliran tertinggi. Ukuran radius pada inlet dan outlet divariasikan dari 0,6 mm sampai 1,4 mm dengan interval sebesar 0,2 mm. Hasil penelitian menunjukkan bahwa radius yang lebih tinggi memiliki laju aliran yang lebih rendah karena efisiensi rektifikasi yang lebih rendah. Namun, terdapat nilai optimum pada radius 0,8 mm dengan laju aliran tertinggi pada inlet dan outlet masing-masing 0,941 mL/menit dan 0,957 mL/menit. Selain itu, kenaikan tegangan penggerak menyebabkan peningkatan laju aliran. Namun, pengaruh kenaikan frekuensi kerja terhadap laju aliran berbanding terbalik dengan kenaikan tegangan penggerak yang diterapkan pada aktuator piezoelektrik. Semakin tinggi nilai frekuensi kerja maka laju aliran fluida pada inlet maupun outlet terus mengalami penurunan. Laju aliran pada frekuensi yang lebih rendah menyebabkan membran dapat mencapai titik maksimum amplitudo getaran. Hasil dari penelitian ini dapat dimanfaatkan untuk pengembangan dan optimasi desain pada aplikasi biomedis.
Pemodelan Dan Simulasi Microring Resonator Dengan Variasi Kopling Sebagai Sensor Dan Perangkat Telekomunikasi Muhammad Zakaria; Lilik Hasanah; Endi Suhendi
Wahana Fisika Vol 2, No 1 (2017): JUNI
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v2i1.7023

Abstract

Untuk memperluas dan menghasilkan kualitas sensor yang baik dari Microring Resonator salah satu objek yang dapat divariasikan ialah kopling dalam devais Microring Resonator. Variasi kopling yang gunakan 0.25, 0.3, 0.5, 0.7. untuk luas sensing dapat dilihat pada FSR (Free Spectral Range) dan kualitas sensor dapat dilihat pada FWHM (full width half maksimum) sebagai parameter sensor dan perangkat telekomunikasi. FSR tidak dipengaruhi oleh kopling hanya dipengaruhi oleh jari-jari dan panjang gelombang. Dengan panjang gelombang yang digunakan 1300 dan 1350. FSR terbesar didapat pada nilai 1350. Kualitas sensor yang kita lihat pada FWHM. FWHM terbesar didapat pada 1350 (panjang gelombang) dan 0.7 lebar koplingnya.In order to improve the performace of microring resonator, the object that can be varied is the coupler in the microring resonator device. The values of the coupler that varied is 0.25, 0.3, 0.5 and 0.7 in nanometer. For the sensing range of the device can be observed in the FSR (Free Spectral Range) and the sensor quality can be observed in FWHM (full width half maximum) as the sensor's parameter and communication device. The FSR was not affected by the coupler but by the radius and the wavelength. In this paper the wavelength that is used are 1300 and 1350. The highest FSR obtained at the 1350 wavelength. The sensor quality is at best when the coupler is 0.7 nm with 1350 wavelength.
Rancang Bangun Penerima Sinyal Berbasis Komunikasi Nirkabel Untuk Monitoring Kualitas Air Rahadian Sri Pamungkas; Lilik Hasanah; Goib Wiranto
Wahana Fisika Vol 1, No 2 (2016): Desember
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v1i2.4537

Abstract

Sebagian besar pengusaha tambak udang atau ikan di Indonesia tidak mengetahui bagaimana keadaan tambaknya. Hal ini karena kurangnya informasi yang tersedia dari kondisi tambak mereka masing-masing. Maka dari itu perlu adanya penyedia informasi keadaan tambak secara detail untuk memaksimalkan potensi dari tambak tersebut. Informasi tersebut dapat berupa parameter kualitas air seperti pH, konduktifitas, oksigen terlarut (Disolved Oxigen, DO), dan temperatur. Dalam kegiatan ini telah dilakukan perancangan dan pembuatan sistem monitoring kualitas air. Sistem yang dibuat terdiri atas sensor, sistem elektronik, komunikasi nirkabel, dan data logger. Dengan teknologi komunikasi nirkabel menggunakan XBEE PRO tentu akan jauh mempermudah pemantauan kondisi tambak. Sinyal yang dikirim dari pengirim sinyal diterima dalam bentuk paket data pada penerima sinyal. Langsung diolah menjadi data sesuai parameter. Dengan bantuan modem GSM/GPRS SIM908 yang dipasang pada perangkat keras menjadikan alat tersebut memiliki kemampuan untuk mengirimkan data yang telah diolah ke server agar ditampilkan di aplikasi android, web, maupun via SMS (Short Message Service).
Analisis Jangkauan Dan Baud Rate Transmisi Data Pada Sistem Telemetri Temperatur Berbasis Mikrokontroler Nurjannah Nurjannah; Lilik Hasanah; Ahmad Aminudin
Wahana Fisika Vol 1, No 1 (2016): Juni
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v1i1.4523

Abstract

Pengujian jangkauan dan boud rate transmisi data pada sistem telemetri temperatur dilakukan untuk menganalisis pengaruhnya terhadap data yang ditransmisikan.. Alat-alat yang digunakan untuk menganalisisnya adalah sensor temperatur LM35, perangkat transmitter, perangkat receiver dan PC. Adapun metode yang dilakukan untuk pengujian jangkauan transmisi data adalah dengan cara mentransmisikan data pada jangkauan 1 meter sampai dengan 10 meter. Sedangkan untuk melakukan pengujian pengaruh boud rate terhadap data yang ditransmisikan dilakukan dengan cara memvariasikan boud rate perangkat receiver pada setiap transmisi data.
Pengaruh Penambahan Rgo Pada Lafeo3 Yang Didoping Co Terhadap Energi Adsorpsi Molekul Etanol Menggunakan Density Functional Theory Untuk Sensor Gas Alta Ridho Anugrah; Andhy Setiawan; Yuyu Rachmat Tayubi; Ahmad Aminudin; Lilik Hasanah; Siti Kudnie Sahari; Endi Suhendi
Wahana Fisika Vol 8, No 2 (2023): December
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v8i2.62210

Abstract

LaFeO3 (LFO) material has been widely used as a gas sensor construction material. Although LFO has been widely applied to gas sensors, the selectivity and sensitivity as well as the working temperature of gas sensors are still not optimal. In this study, the LFO was Co-doped and coated with single layer rGO to analyze its sensitivity and selectivity based on adsorption energy using Density Functional Theory (DFT). Based on this research, it was found that the presence of Co doping and rGO coating could increase the adsorption energy on the LFO. The addition of the rGO layer to the LFO increased the adsorption energy by 23.58% from -2.38 eV for Co-doped LFO to -2.93 eV when rGO was added. This shows the potential of adding rGO layers to LFO materials for sensor materials.
DEVELOPMENT OF DC-DC BUCK CONVERTER FOR SOLAR PANEL ENERGY STORAGE THROUGH LOAD OPTIMIZATION AND FEEDBACK CIRCUIT Indrasari, Widyaningrum; Rama, Gusti; Setiadi, Rahmondia Nanda; Hasanah, Lilik; Sahari, Siti Kudnie
Spektra: Jurnal Fisika dan Aplikasinya Vol. 8 No. 3 (2023): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 8 Issue 3, December 2023
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.083.02

Abstract

Solar panels are crucial components in converting sun radiation into electrical energy through the photovoltaic effect. A solar panels cannot be connected directly to the load due to its low energy conversion efficiency and low output voltage. One of the methods used to control solar cells to operate efficiently at their maximum power point is MPPT. In this paper, we design a DC-DC converter by modifications of the Butterworth filter circuit and feedback circuit in the MPPT system for storing solar panel electrical using the Hill Climbing (HC) method. The device consists of a DC-DC buck converter circuit, two pieces of INA219 sensors, a DS18B20 temperature sensor, a MAX44009 light intensity sensor, a SD card module and a DS3231 RTC. The DC-DC buck converter circuit simulation is carried out to determine the optimal load. The load optimization was conducted by analyzing the AC simulation using Ltspice software. The magnitude of the output voltage ripple in nine different loads was observed. From the simulations performed, it was found that the 50 Ω load has an output voltage ripple of 8.96 mV and is smaller than the other loads. The main DC-DC buck converter circuit is designed using a butterworth low pass filter with a cut-off frequency of 1000 Hz (R = 50 Ω, L = 33.8 mH and C = 750 nF) and a feedback circuit with a cut-off frequency of 500 Hz is added. From the prototype measurement, it was found that the average output power was 3249,7 milliwatts and the average input power was 4779 milliwatts, thus the average efficiency was 68%. With these results, the DC-DC converter circuit configuration is suitable for use in electrical energy storage systems from solar panels that have high efficiency.
Integration of Project Based Learning with STEM Approach to Alternative Energy Material as Effective Learning to Improve Problem Solving Skills Roslina, Roslina; Liliawati, Winny; Hasanah, Lilik
Journal of Teaching and Learning Physics Vol 9, No 2 (2024): Journal of Teaching and Learning Physics (September 2024)
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jotalp.v9i2.26650

Abstract

This study aims to determine the effectiveness of STEM-PjBL learning in improving students' problem-solving abilities in alternative energy materials. This research was conducted in one of the high schools in the city of Bandung. Samples were obtained by rational sampling of 35 students in class X MIPA I (experimental class) and 35 students in class X MIPA II (control class). The method used is a quasi-experimental design with a non-equivalent control group design. Data collection technique is a description test in the form of pre-test and post-test. Based on data analysis it is known that the use of STEM-PjBL can improve students' problem solving skills (N-Gain = 0.65) in the experimental class compared to the control class (N)-Gain = 0.44). The t-test results with SPSS 22 with Sig. (2-value) less than 0.05 indicates that there is a significant difference in the increase in the problem solving ability of students in the experimental class and the control class. Based on these results, learning has a positive impact on students' problem solving abilities. STEM-PjBL learning can be used as an alternative teaching strategy at various school levels.
Metode Anotasi Visual Baru untuk Meningkatkan Akurasi Sistem Penentuan Posisi dalam Ruangan Berbasis Kamera Ramdhania, Lathifa Nur; Almadaniy, Hanif; Aminudin, Ahmad; Hasanah, Lilik
JTERA (Jurnal Teknologi Rekayasa) Vol 10, No 1: Juni 2025
Publisher : Politeknik Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31544/jtera.v10.i1.2025.105-112

Abstract

Sistem penentuan posisi dalam ruangan (Indoor Positioning System/IPS) memiliki peranan penting dalam berbagai aplikasi seperti navigasi robot, pelacakan aset, dan sistem layanan otomatis. Salah satu pendekatan IPS yang menjanjikan adalah berbasis kamera menggunakan algoritma YOLOv4 karena biayanya yang relatif rendah dan fleksibilitas penggunaannya, namun akurasinya masih tergolong rendah. Studi ini meningkatkan akurasi sistem IPS berbasis kamera melalui pendekatan anotasi visual baru, yaitu dengan menempatkan anotasi pada titik tengah antara dua kaki manusia sebagai acuan posisi objek di lantai. Dataset khusus berisi 2.000 citra digunakan untuk melatih model YOLOv4 yang telah disesuaikan. Hasil evaluasi menunjukkan peningkatan performa dengan nilai mean average precision (mAP) sebesar 99,19% setelah pelatihan sebanyak 6.000 iterasi. Rasio konversi pixel-ke-centimeter yang diperoleh mencapai 0,309 cm/pixel (sumbu-x) dan 0,308 cm/pixel (sumbu-y), dengan peningkatan akurasi sebesar 62,43% dan penurunan standar deviasi sebesar 69,01%. Temuan ini menunjukkan bahwa metode kalibrasi menggunakan anotasi pada kaki secara signifikan meningkatkan akurasi estimasi posisi dalam ruangan.
Co-Authors Aay Susilawati Achmad Samsudin Adi Bagus Suryamas Ahmad Aminudin Ajuni B. Pantjawati Almadaniy, Hanif Alta Ridho Anugrah Andhy Setiawan Andrivo Rusydi Apri Wiyono Arjuni B Pantjawati Ayub Subandi Brian Yuliarto Budi Mulyanti Cecep Kusmana Chandra Wulandari Dadin Mahmudin Deni K. Jamil Dewi Yulianawati Dewi Yulianawati Diana Rochintaniawati E. Suhendi Edy Junaidi Eis Nurzakiyah Eka Pawinanto, Roer Endi Suhendi Endi Suhendi Euis Sustini Fauzan, Jahril Nur Ghina Aghnia Nur Assyifaa Goib Wiranto Goib Wiranto Goib Wiranto, Goib Hera Novia Herni Yuniarti Suhendi Heru Yuwono Ida Hamidah Ida Hamidah Ida Kaniawati Indra Irawan Iqbal Syamsu Iqbal Syamsu Ismu Wahyudi Iwan Kustiawan Jumril Yunas Jumril Yunas, Jumril Kapıcı, Hasan Özgür Khairurrijal Khairurrijal Kusrini, Priyani Lee, Chang-Wook Luqmanul Hakim Maknun, Johar Maman Budiman Markus Diantoro Mikrajuddin Abdullah Mimin Iryanti Muhammad Zakaria Nada Sadidah Naftalia Trivenia Simbolon Nurjannah Nurjannah Nurul Ashri Nurul Huda Nuryani Rustaman P. Susthita Menon Pamungkas, Rahadian Sri Pangestu, M. Assadillah Priyani Kusrini Rahadian Sri Pamungkas Rahmondia N. Setiadi Rama, Gusti Ramayanti, Suci Ramdhani Ramdhani Ramdhania, Lathifa Nur Rifqi Md Zain, Ahmad Roer Eka Pawinanto, Roer Eka Roslina Roslina, Roslina Sahari, Siti Kudnie Sahbudin Shaari Satria Zulkarnaen Bisri Setiya Utari Setyo Nugroho, Harbi Siti Kudnie Sahari Sudirman Sudirman Sugandi, Gandi Sukirno Sukirno Sukirno Sukirno Susilawati, Aay Tommi Hariyadi, Tommi Toto Winata Tri Lunggari D. C Wahyu Sasongko Putro Waslaluddin MT Widyaningrum Indrasari Winny Liliawati Wulandari, Chandra Yuski Maolid Rizki Faozan Yusuf Nur Wijayanto Yuyu Rachmat Tayubi Zain, Ahmad Zulkarnain