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All Journal Jurnal Sains Materi Indonesia Perfecting a Video Game with Game Metrics Journal of Degraded and Mining Lands Management The Journal of Pure and Applied Chemistry Research Jurnal Ilmiah Setrum EduChemia (Jurnal Kimia dan Pendidikan) Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) SPEKTRA: Jurnal Kajian Pendidikan Sains Journal of Natural Science and Integration Dinamisia: Jurnal Pengabdian Kepada Masyarakat Indonesian Journal of Electrical Engineering and Computer Science Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Jurnal Pengabdian Dinamika
Yus Rama Denny
Department Of Physics Education, University Sultan Ageng Tirtayasa, Banten, 42435, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Physics Public Health Social Sciences Other

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Bandwidth and Gain Enhancement of MIMO Antenna by Using Ring and Circular Parasitic with Air-Gap Microstrip Structure Teguh Firmansyah; Herudin Herudin; Suhendar Suhendar; Romi Wiryadinata; M Iman Santoso; Yus Rama Denny; Toto Supriyanto
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 15, No 3: September 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v15i3.6377

Abstract

This research was proposed a circular patch MIMO antenna by using a ring and circular parasitic radiator structure. As a novelty, in order to enhance bandwidth and gain of circular patch MIMO antenna, a conventional circular patch MIMO antenna will be added a ring and a circular parasitic. Therefore, this research was investigated a conventional MIMO antenna (C-MA), ring parasitic MIMO antenna (RP-MA), and circular parasitic MIMO antenna (CP-MA) as Model 1, Model 2, and Model 3, respectively. This MIMO antenna was designed on FR4 microstrip substrate with r= 4.4, thickness h=1.6 mm, and tan = 0.0265. This MIMO antenna has center frequency 2.35 GHz which is a frequency band for LTE application in Indonesia. An Advance Design System (ADS) software was used to determine the antenna parameters. The MIMO antenna C-MA / RP-MA/ CP-MA achieves 2.36GHz/ 2.38GHz/ 2.38 GHz, 70 MHz/ 100 MHz/ 120 MHz, 1.625 dBi/ 4.066 dBi/ 4.117 dBi, 6.414 dBi/ 7.26 dBi/ 7.153 dBi, 33.9 %/ 47.8 %/ 49.70 %, -12.35 dB/ -22.21 dB/ -23.66 dB, and -30.924 dB/ -28.46 dB/ -27.59 dB for center frequency, bandwidth, gain, directivity, efficiency, reflection coefficient, and mutual coupling, respectively. Compared to C-MA (Model1) performances, The result showed that proposed antenna has wider-bandwidth/ higher-gain with 42.8%/ 150.2 %, and 71.4%/ 163.3% for RP-MA (Model 2) and CP-MA (Model 3), respectively. The proposed antenna has size of 50 mm x 130 mm x 23.2 mm. Measured results are in a good agreement with the simulated results.
The Development of Blended Learning Model using Edmodo to Train Student Critical Thinking Skills on Impulse-Momentum Topic Yus Rama Denny; Indri Sari Utami; Siti Rohanah; Dewi Muliyati
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol 6 No 1 (2020): JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika), Volume 6 Issue 1, J
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (414.551 KB) | DOI: 10.21009/1.06113

Abstract

This study determines the effect of developing blended learning models using Edmodo on students’ critical thinking skills on impulse and momentum. The research method used in this study is ADDIE. The population in this study is class X MIA SMAN 4 Serang City. The sample of this study amounted to 31 students from class X MIA 2 as an experimental class using a blended learning model and 30 students from class X MIA 3 as a control class using a cooperative model. The test used in this study was seven indicators of critical thinking skills. These results indicate an increase in students’ critical thinking skills after being given treatment that is by using a blended learning model. The N-Gain value evidences a large increase in the experimental class that is 0.60 in the medium category and 0.23 in the low category in the control class. The average value of pretest and posttest is 5.27 and 9.77 in the control class, while in the experimental class is 5.65 and 16.61. These results show that there is an influence on the development of blended learning models for critical thinking skills on the momentum and impulses.
THE INFLUENCE OF COMPOSITION OF CNT (CARBON NANOTUBE) ON THE PHYSICAL PROPERTIES OF BIOPLASTIC MADE FROM CASSAVA STARCH Masitoh Mangsur; Akbar Hanif Dawam Abdullah; Rahmat Firman Septiyanto; Yus Rama Denny Muchtar; Isriyanti Affifah
Jurnal Sains Materi Indonesia Vol 20, No 4: JULY 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2019.20.4.5514

Abstract

Bioplastics are starch-based polymers that are easily degraded by microorganisms, so they can be used as an alternative to the use of conventional plastics. In this research, bioplastics made from cassava starch was made using glycerol as plasticizer and used MWCNTs (Multi-Wall CNTs) type CNT as reinforcement with variations in the composition of 0%, 1%, 2%, and 3%. Bioplastics are made with a dry method (dry blending) with stages of pre-mixing, mixing, hot press and cold press. Characteristics of bioplastic starch/CNT include tensile strength, biodegradation and morphological. The test results show that the addition of CNT composition affects the mechanical properties of bioplastics. The optimum value of tensile strength occurred in the addition of 2% CNT at 13.52 MPa. Biodegradable test results using the Aspergillus niger mushroom prove that bioplastic starch/CNT can be degraded well. The results of morphological characteristics in the form of SEM results showed that 3% bioplastic starch / CNT had cracks and resulted in decreased tensile strength. FTIR test results indicate the presence of a new functional group C≡C because of the addition of CNT.
Effect of Precursor Concentration and Annealed Substrate Temperature on the Crystal Structure, Electronic and Optical Properties of ZnO thin film Yus Rama Denny Muchtar; Teguh Firmansyah; Adhitya Trenggono; Danu Wijaya; Ganesha Antarnusa; Andri Suherman
The Journal of Pure and Applied Chemistry Research Vol 9, No 1 (2020): Edition January-April 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.01.514

Abstract

This study carried out on the effect of precursor concentration and annealed substrate temperature on the crystal structure, electronic and optical properties of ZnO thin film. An aqueous solution of Acid Nitrite was used as precursors and its concentration was varied from 0.1 M to 0.4 M. The ZnO thin film was deposited on the glass substrate by Spray Pyrolysis Deposition and annealed with different temperature from 300 oC to 600 oC. The crystal structure, electronic and optical properties were investigated by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and UV-Spectrometer. XRD result showed that all thin films have amorphous hexagonal wurtzite crystalline. Particle sizes ranging from 21.83 to 43.67 nm were calculated through Debye-Scherer Method. It showed that the concentration of the precursor had slightly impact on the particle size. Meanwhile, the increase in particle size with increasing annealed temperature is found to be gradual. The average transparent of all thin film was more than 80%. The bandgap of the ZnO thin films was estimated by Tauc Plot Relation. It showed that the bandgap values were increased with the increasing of precursor concentration due to Burstein-Moss Effect. In addition, the decrease in band gap values was found with increasing annealed temperature. Our results demonstrated that the varying precursor concentration and annealed substrate temperature can enhance the structure, electronic and the optical properties of ZnO thin films.
Pengaruh Karakteristik Bioplastik Pati Singkong dan Selulosa Mikrokristalin Terhadap Sifat Mekanik dan Hidrofobisitas Sinda Intandiana; Akbar Hanif Dawam; Yus Rama Denny; Rahmat Firman Septiyanto; Isriyanti Affifah
EduChemia (Jurnal Kimia dan Pendidikan) Vol 4, No 2 (2019)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.198 KB) | DOI: 10.30870/educhemia.v4i2.5953

Abstract

Bioplastik merupakan salah satu alternatif pengganti plastik. Karena bioplastik terbuat dari biopolimer yang dapat terdegradasi oleh mikroorganisme. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh karakteristik biopslatik pati singkong dengan kandungan selulosa 0% (tanpa penambahan selulosa) dan  bioplastik pati singkong dengan penambahan selulosa 10% terhadap sifat mekanik dan hidrofobisitasnya. Pengujian karakteristik dari penelitian ini adalah uji mekanik, uji ketahanan air dan uji sudut kontak. Hasil yang diperoleh pada bioplastik dengan penambahan kandungan selulosa 10% memiliki kekuatan tarik yang lebih tinggi dibandingan dengan bioplastik tanpa penambahan selulosa. Penambahan dengan kandungan selulosa 10% yang memiliki kekuatan tarik 14,3 MPa. Sedangkan hasil yang didapatkan pada uji water uptake dan sudut kontak menyatakan bahwa bioplastik dengan penambahan kandungan selulosa bersifat hidrofilik.
PERBANDINGAN SIFAT MEKANIK BIOPLASTIK TERHADAP PENAMBAHAN ZINC OXIDE (ZnO) Syamsul Hidayat; Akbar Hanif Dawam Abdullah; Rahmat Firman Septiyanto; Yus Rama Denny Muchtar; Isriyanti Affifah
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 5, No 2 (2019)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (455.904 KB) | DOI: 10.30870/gravity.v5i2.5939

Abstract

Bioplastik merupakan jenis plastik yang terbuat dari bahan alami sehingga dapat dengan mudah terdegradasi oleh aktivitas mikroorganisme salah bahannya adalah pati singkong. Akan tetapi bioplastik belum bisa diproduksi secara masal dan digunakan sehari-hari karena mamiliki sifat yang belum sesuai untuk menggantikan plastik yang ada saat ini. Penelitian ini bertujuan untuk mengetahui perbandingan sifat dan karakterisasi bioplastik tanpa penambahan filler lain dan bioplastik dengan penambahan nanopartikel Zinc Oxide. Beberapa pengujian dan karakterisasi dilakukan dalam penelitian ini, meliputi struktur morfologi, kekuatan mekanik, dan biodegradasi. Dari karakterisasi SEM dihasilkan bahwa bioplastik dengan penambahan nanopartikel Zinc Oxide cenderung memiliki morfologi yang lebih baik, tidak retak, walaupun terdapat agregasi partikel. Pengujian lain menunjukan bahwa nanopartikel Zinc Oxide mampu meningkatkan kekuatan tarik bioplastik namun menghambat pertumbuhan mikroorganisme 
KARAKTERISASI STRUKTUR MIKRO DAN STRUKTUR KRISTAL FILM TEBAL FETIO3 DARI BAHAN MINERAL INDONESIA Yus Rama Denny; Andri Suherman; Dani Gustaman
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 2, No 2 (2016)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (387.399 KB) | DOI: 10.30870/gravity.v2i2.1126

Abstract

Telah dilakukan studi awal pembuatan dan pengolahan bahan mineral Indonesia sebagai bahan dasar pembuatan termistor NTC. Bahan mineral yarosit dari alam dimurnikan dengan larutan HCl, diendapkan dengan menggunakan NH4OH dan dipanaskan pada suhu kalsinasi 700oC selama 2 jam. Pembuatan termistor NTC dilakukan dengan mecampurkan serbuk yarosit hasil pemurnian dan pengendapan dengan TiO2. Pasta termistor FeTiO3 dicetak dipermukaan alumina substrat dengan metode screen printing, kemudian dilakukan pemanasan pada suhu 500oC selama 1 jam diruangan udara dilanjutkan disinter pada suhu 1100oC selama 1 jam diruangan hidrogen. Sifat listrik keramik film tebal hasil sinter diukur pada berbagai suhu. Struktur kristal dievaluasi dengan difraksi sinar x (XRD), dan struktur mikro dievaluasi dengan menggunakan SEM (Scanning Electron Microscope). Data analisis XRD memperlihatkan bahwa seluruh keramik film tebal berstruktur heksagonal (Illiminite). Data struktur mikro dan sifat listrik memperlihatkan bahwa termistor dari yarosit memenuhi kebutuhan pasar.
Analysis of the use of learning models in physics subjects at SMAN 9 Kota Tangerang Selatan Banten Indri Sari Utami; Ruth Soukaning Nugrah Djati; Yus Rama Denny; Yuvita Oktarisa
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 6, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v6i2.8604

Abstract

The learning model is a frame in a learning process that can support the achievement of learning objectives. This study aims to determine, 1) the learning model used in physics subjects in schools, 2) the obstacles faced by the teacher in applying the learning model, and 3) efforts to overcome the obstacles in applying the learning model to achieve learning objectives. This research method is qualitative research. The survey was conducted on one physics teacher and three students determined by random sampling—observation data collection using interviews and documentation systems. While the data analysis technique used is descriptive qualitative analysis technique. From the research results obtained that: 1) the learning model carried out in the learning process at SMAN 9 Kota Tangerang Selatan Banten is CL (Cooperative Learning) and CTL (Contextual Teaching and Learning), 2) the constraints faced by the teacher when implementing the learning model are the ability students who are lacking in understanding the concepts of physics so that the difficulty in solving problems and challenges in choosing the equations used, 3) efforts to overcome the obstacles in using learning models are needed to develop appropriate learning models such as STEM-based CTL models that make students construct their knowledge. 
Development of formaldehyde detector in salted-fish using color sensor Endi Permata; Yus Rama Denny; Irvan Akram
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 7, No 2 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v7i2.12686

Abstract

Currently, almost all traders use dangerous preservatives in salted fish, one of which is formaldehyde. Traders use these chemicals to make food more durable, even though the food will be consumed by humans. This is due to a lack of knowledge about foods that contain dangerous chemicals. Therefore, the Arduino Uno R3-based tool was developed. This Arduino Uno R3-microcontroller tool can test food practically and effectively quantitatively because it does not take long to see results. The TCS3200 was color sensor is used to detect food samples containing formaldehyde after being mixed with Formaldehyde Main Reagent according to the dosage. The sensor detects the changing color after everything has reacted, and a buzzer alarm will sound when the salted fish has formaldehyde. The test results are displayed on the 16x2 LCD screen and the NetBeans java application, where the output is a detection of whether salted fish has formalin or is formalin free. The initial data collection used a literature study and observation. This study used quantitative analysis and qualitative analysis. Based on the results, the performance test data of Formaldehyde Detector Prototype in Salted Fish Using Arduino Microcontroller-Based TCS3200 Color Sensor obtained a score of 74 or in the "Very Feasible" category. 
Determination of the band gap energy for ternary material Sn-In-Zn-O thin films by electron spectroscopy and ultra-visible spectrometer Yus Rama Denny
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 1, No 1 (2015)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (145.617 KB) | DOI: 10.30870/gravity.v1i1.2487

Abstract

The SnInZnO thin film was prepared at room temperature by RF magnetron sputtering. The band gap of this film was investigated by REELS and UV-Spectrometer analysis. By using REELS with low energy (500 eV) and high energy (1500 eV) electron beams, the surface band gap as well as and the bulk energy band gap were measured. The result shows that the band gaps are affected by the primary electron energies. The transmittance value of 80% in the visible light region has been achieved. The optical band gap was calculated by using Tauc’s relation from UV-Spectrometer analysis and compared to that of the band gap obtained by the REELS spectra.
Co-Authors Abdul Hasyim Sodiq Adhitya Trenggono Adhitya Trenggono Akbar Hanif Dawam Akbar Hanif Dawam Abdullah Akbar Hanif Dawam Abdullah Andri Suherman Andri Suherman Dani Gustaman Danu Wijaya Dewi Hastusi Dewi Muliyati Dina Rahmi Darman Dwi Ningsih Susilowati Endi Permata Endi Permata Endi Permata Endi Permata Fitria Riany Eris Ganesha Antarnusa Herudin Herudin Hilda Nurwianti Indri Sari Utami Indri Sari Utami Indri Sari Utami Irvan Akram Irwanto Isriyanti Affifah Isriyanti Affifah Isriyanti Affifah Lusiani Dewi Assaat M Iman Santoso Masitoh Mangsur Maudi Yuliana Suryana Mohammad Fatkhurrokhman Muhammad Hafith N Nurmayulis Novita Nurilmy Peradea Wati Rahmat Firman Septiyanto, Rahmat Firman Ria Retno Yulianti Rilva Afrilia romi wiryadinata Rudi Hartono Ruth Soukaning Nugrah Djati Sandy Permana Sinda Intandiana Siti Rohanah Sri Wahyuni Suhendar Suhendar Sulaeman Deni Ramdani Syamsul Hidayat Syifa Halimatusa’diyah Teguh Firmansyah Teguh Firmansyah Toto Supriyanto Vaka Gustiono Yudi Guntara Yudi Guntara Yuvita Oktarisa Zalza Afni Azzahra