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All Journal Jurnal Ilmu Dasar Journal of Mathematical and Fundamental Sciences Science and Technology Indonesia JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) Spektra: Jurnal Fisika dan Aplikasinya JURNAL EKSAKTA PENDIDIKAN (JEP) Eksakta : Berkala Ilmiah Bidang MIPA Pelita Eksakta Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Journal of Social And Economics Research journal of social and economic research

Ramli Ramli

Universitas Negeri Padang

Author-ID : 3501599

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Analisis sifat listrik nanokomposit Fe3O4/PVDF yang disintesis dengan metode sol gel untuk aplikasi elektroda baterai lithium ion (Analysis of the electrical properties of Fe3O4 / PVDF nanocomposites synthesized by sol gel method for lithium ion battery electrode applications ) - Rahmi; - Ramli; Yenni Darvina
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

As technology develops at this time, all electronic components require a voltage source. One source of voltage is the battery. West Sumatra is one area that is rich in eccentrics. Iron ore content in Tiram Beach in West Sumatra is 34.015%, followed by other elements as pollutants. However, basically there is still a lack of public knowledge about nano materials. Nano composite is a mixture of matrix and filler with a certain composition. This study aims to find out which is good for making lithium batteries. The requirement for making lithium batteries is high conductivity and high capacitance. At this time also look at the properties of fe3O4 nano compresses. Based on experiments that have been carried out will produce Fe3O4 and PVDF, the greater the value of electrical conductivity and capacitance will be. The conductivity values obtained were 437082.9 S / m, 8337755 S / m, 753969 S / m, 9300430 S / m, 1034708 S / m and the capacitance value was 35.94μF, 37.8 μF, 5.2 μF, 194 μF, 2.68 μF. Based on the results that can be used is a large amount of 10 ml: 30 ml.

The effect of composition of NiFe2O4 on the crystal structure of nanocomposite NiFe2O4 / PVDF that synthesized using sol gel spin coating method Yessy Arinda Putri; - Ramli
PILLAR OF PHYSICS Vol 13, No 2 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

NiFe2O4 is a Ferrite Compound with the molecular formula MFe where M is a transition metal or alkaline earth is a magnetic semiconductor material with a spinel structure. The polymer used in this study is Polyvinilidene Flouride (PVDF). PVDF film is a material that is inexpensive, lightweight, flexible, has a wide frequency range, and is very sensitive. In this study 5 compositions were carried out namely ((50% : 50%), (33,3% : 66,6%), (25% : 75%), (75% : 25%), (66,6% : 33,3%)). Nanocomposites are synthesized using the sol-gel spin coating method. With making precursors (Fe(NO3) 3.9H2O and Ni(NO3) 2.6H2O. For the growth of thin films, the solution is dripped on a 0.5 cm x 0.5 cm glass substrate. Characterized using XRD (X-Rey Diffraction), SEM (Scanning Electron Microscope), FTIR (Fourier Transform Infra Red). Keywords : NiFe2O4,PVDF,Nanokompocite, Sol Gel, and Spin Coating

CHARACTERIZATION STRUCTURE MICRO OF GRAPHENE OXIDE WHICH SYNTHESIS FROM BAGASSE WITH MODIFIED HUMMERS METHOD viola sesri wahyuli; - Ramli
PILLAR OF PHYSICS Vol 14, No 2 (2021)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12227171074

This study aims to form a graphene oxide layer from bagasse, which by knowing the microstructure of the layer graphene oxide can be used as microwave absorption. In the process, bagasse is made into activated carbon with various carbonation temperatures, namely 300oC, 350oC, 400oC and 450oC. Then it was synthesized using the modified hummers method by mixing carbon with H2SO4, KMnO4, H2O2 and aquades. Then they were characterized using FTIR, XRD and SEM.Based on the FTIR data, it states that there is a relationship between carbon (C), hydrogen (H) and oxygen (O) which proves the formation of a graphene oxide layer. Also based on the results of XRD which states that the diffraction angle is in the range of 10o-90o and has the highest crystal size of 40.5267076 nm. Likewise, the results from SEM which stated that the best graphene oxide was at an average particle size of 81,4043598 nm. The resulting graphene oxide is also shaped like monolayer sheets.

Pengaruh komposisi MnFe2O4 terhadap sifat listrik nanokomposit MnFe2O4/ PVDF yang disintesis dengan metode spin coating (The effect of MnFe2O4 composition on the electrical properties of MnFe2O4 / PVDF nanocomposites synthesized by the spin coating method) Onny Gustira; Yenni Darvina; - Ramli
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Manganese ferrite (MnFe2O4) has an MnFe2O4 structure in which its manufacture uses manganese mineral powder. MnFe2O4/ PVDF nanocomposites are made in the form of thin films to see the electrical properties that are affected by variations in composition. MnFe2O4/ PVDF nanocomposites were characterized using XRD, FTIR and FPP. The XRD characterization results show that the Monoclinic Crystalline form for PVDF and Cubic for MnFe2O4, the angular value of 2θ formed is the greater the composition of MnFe2O4 from small to large used, then MnFe2O4 and PVDF are already present in the MnFe2O4/ PVDF angles which are seen in the composition of MnFe2O4 from small to large used, then MnFe2O4 and PVDF are already present in MnFe2O4 / PVDF diffraction peak. FTIR characterization results can be seen that MnFe2O4 successfully binds to PVDF, where Fe-O is a functional group MnFe2O4 and CH2 is a PVDF functional group. The results of the FPP characterization show that if the MnFe2O4 composition is getting bigger and the PVDF composition is getting smaller, the resistivity value is small and the conductivity value is greater.

Optimalisasi temperatur kalsinasi untuk mendapatkan kalsit-CaCO3 dalam cangkang pensi (Corbicula moltkiana) yang terdapat di Danau Maninjau (Optimization of calcination temperature to obtain calcite-CaCO3 in pensi shells (Corbicula moltkiana) found in Lake Maninjau) Suci Wahyuni; Yenni Darvina; - Ramli
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The utilization of pensi (Corbicula moltkiana) shell waste in Maninjau lake is not optimal so that we need an effort to make it has economic value. One of them is using calcium carbonate in pensi shell. Calcite is one of calcium carbonate polymorphs are often used in industrial paint, paper, ink, and other chemical industries. This experiment aims to determine optimum of calcination temperature to obtain calcite in pensi shell can be exploited and has economic value. The method that used is by giving calcination temperature of 300˚C, 320˚C, 340˚C, 360˚C, 380˚C, dan 400˚C to pensi shell and then characterized using XRF and XRD. Result of characterization using XRF show that pensi shell containe calcium element is 93,207% dan about 6% of other elements such as Si, Al, Ag, Mg, P, dan Fe. The result of characterizaion using XRD that compared with the ICDD database show that calcite phase has Rombhohedral structure with unit cell a = 4,9590Å, b = 7.9680Å, and c = 5.4710Å. Based of analysis can be concluded that the increase in temperature causes increasing intensity of calcite and dominant temperature to obtaine calcite phase at 400˚C

ANALISIS STRUKTUR NANO DARI LAPISAN TIPIS COBALT FERRITE YANG DIPREPARASI DENGAN METODE SPUTTERING Ramli Ramli; Riri Jonuarti; Ambran Hartono
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 18 No. 01 (2017): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

In this paper we report the results of studies relating to the synthesis of Cobalt Ferrite (CoFe2O4) thin films by a sputtering method. The CoFe2O4 thin film has been prepared onto silicon substrate from the sputtering targets, CoFe. Structural propertiesofthinfilms were characterized byx-ray diffraction and the morphology was characterized by scanning electron microscopy. The growth parameter are: base pressure 2,8 x 10-2 Torr, ratio of Argon:Oxygen flow rate are 100:50 sccm, deposition pressure 5.4 x10-1 Torr, growth temperature 100oC.Nanostructures of the thin film that have been analyzed are crystallite size and micro strain.We obtained the crystallite size of CoFe2O4 thin films for layer thickness of 40 and 48 nm, respectively are: 32 nm and 66 nm, while the micro strain is 8.0 x 10-4 and 10.2 x 10-4.

Development of a Digital Dip Coating System Based Microcontroller Yohandri Yohandri; Khairunnisa Khairunnisa; Ramli Ramli; Rahadian Zainul
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 20 No. 2 (2019): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Coating techniques are important parts in the development of nano material technology. In this paper, the development of coating technology based on microcontroller using dip coating is presented. Arduino microcontroller is implemented to control the immersion time and the speed of withdrawal of material out of the coating fluid through a stepper motor. In addition, the withdrawal speed can be digitally entered through a keypad with a value range of 0.02 mm/s to 10 mm/s. The experiment results showed the percentage of accuracy and precision of the microcontroller based dip coater was very high. Based on these results, the developed dip coater is satisfied to be used in the development of nanotech materials

Pengembangan Lembar Kerja Peserta Didik Fisika Berbasis Pendekatan Science, Technology, Engineering, and Mathematics untuk Meningkatkan Berpikir Kritis Peserta Didik Ramli Ramli; Yohandri Yohandri; Yulis Septianas Sari; Mitri Selisne
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 4 No 1 (2020): JEP : Jurnal Eksakta Pendidikan
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jep/vol4-iss1/405

Students' critical thinking skills are still not optimal. One of the reasons is the use of teaching materials in the form of student worksheets that are not yet in line with the good student worksheet structure, do not yet contain the STEM approach, and critical thinking indicators have not been clearly illustrated in the student worksheet. The purpose of this study is to determine the validity of the LKPD, determine the practicality and effectiveness of using student worksheet Physics based on the STEM approach that can improve students' critical thinking. This type of research is research and development (R&D) using the Borg & Gall model which consists of the initial research and information gathering stage, planning, developing the initial product format, and initial trials. As the object of research is the Physics student worksheet based on the STEM approach. Data collection instruments used were expert validation sheets, practicality test sheets, and effectiveness test sheets. The effectiveness test uses an assessment sheet of learning outcomes tests and observation sheets of students' critical thinking. The data analysis technique used is the analysis of the validity of the Physics student worksheet, the practicality analysis of the use of the Physics student worksheet, and the effectiveness analysis of the use of the Physics student worksheet. Based on the analysis of the data that has been done, two research results can be put forward. First, the average value of the validity of the Physics student worksheet based on the STEM approach is 0.88 and this value is included in the valid category. Second, the average value of the practicality test for the use of Physics student worksheet by teachers and students respectively 91.44 and 84.14. This value shows the Physics student worksheet is in the category of very practical. Besides that, the use of Physics student worksheet based on the STEM approach is effective to improve students' critical thinking

Efektivitas Pengembangan LKPD Fisika SMA/MA Berbasis Inquiry Training Untuk Meningkatkan Kemampuan Berpikir Kreatif Peserta Didik Rumi Yuliska; Syafriani Syafriani; Ramli Ramli
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 4 No 1 (2020): JEP : Jurnal Eksakta Pendidikan
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jep/vol4-iss1/428

Effectiveness is the level of suitability and success in the use of inquiry training worksheets in the learning process. The purpose of this study is to investigate the effectiveness of a Student Worksheet. The subjects of this study were 28 students and 1 teacher. This type of data is primary data. The result of effectiveness is marked by an increase in knowledge competency with a gain score of 0.64 which is categorized as moderate. The assessment of attitudes competency average attainment of 84.88% and assessment of creative thinking abilities in the very creative category at the third meeting with an average of 81.19. It can be concluded that the Student Worksheet developed was effective.

Validitas E-Modul Fisika SMA Berbasis Inkuiri Terbimbing Terintegrasi Etnosains untuk Meningkatkan Kemampuan Berpikir Kreatif Peserta Didik Cici Dwi Tisa Haspen; Syafriani Syafriani; Ramli Ramli
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 5 No 1 (2021): JEP (Jurnal Eksakta Pendidikan)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jep/vol5-iss1/548

The creative thingking ability of students in high school is still very low. This is due to the ina dequate use of teaching materials. The teaching used are still using printed modules and do not contains steps in the learning model that direct students to be able to improve their creative thingking skills. One of the solutions to improve studentâ€™s creative thinking skill in physics learning is to use â€“electronic mod- ule (e-module). The e-module which is equipped with a Guided Inquiry Learning Model and Integrat- ed Ethnoscience is a suitable combination to increase creative thinking skills. Through the e-module, students are able to learn independently with the help of ethnoscience in their neighborhood. This study aims to determine the level of validity of the e-module physics based Guided Inquiry Integrated eith Ethnoscience to improve studentâ€™s Creative Thinking Skills. The type of research is Research and Development (RnD) with the ADDIE development model. But, in this research is limited to the devel- opment stage. Because, this research only to see the validity of the product. The instrument used was a validation sheet in the form of an assessment questionnaire by three validators. The data analysis technique used is Aiken V formula. The result validation of e-module an average of 0,83 with the valid category. From the validation results it can be said that Physics e-modul based on guided inquiry in- tegrated with ethnoscience to improve students creative thinking skills meets the valid criteria.

Co-Authors - Helmita - Rahmi - Yulkifli Adli Dzil Ikhram Ahmad Aminudin Ahmad Fauzi Ahmad Rofiq Ambran Hartono Ambran Hartono Ambran Hartono arifaldi arifaldi Asrizal Bevi Lidia Cici Dwi Tisa Haspen Cuk Imawan Dadang Dadang Desnita Dessi Verawati Djusmaini Djamas Djusmaini Djamas Djusmaini Djamas Edi Sanjaya Edi Sanjaya Elvida Yulia Fadhila Ulfa Jhora Faridah Lisa Supian Fatni Mufit Fildzah Rudyah Putri Nurzam Fitri Anika Freddy Haryanto Gusmita Cahnia Putri Gusnedi Gusnedi Hamdi Rifai Haryona Delvita Herman Bahar Hidayati Hidayati Hifnul Rizky Al Ulfa Iing Rika Yanti Imron Maulana Indah Septia Ningsih Irna Humairah Jalu Ahmad Prakosa Khairunnisa Khairunnisa Khairurrijal Khairurrijal Lathifa Zonesya Putri Letmi Dwiridal Lucya Sinurat Mahrizal Mahrizal masril masril Mitra Djamal Mitra Djamal Mitri Selisne Moulia Fadhilah Muhammad Yogi Rivano Nadia Ardianti Nadya Aztifa Nidya Yulfriska Nurhafizah Nurhafizah Nurul Hasanah Daniyah Putri Onny Gustira Puja Kahar Putri Auliyani Putri Diana Rahadian Zainul Rahmat Hidayat Ramanda Fazrian Ratnawulan . Renol Afrizon Ricca Tiara Rif'il Husniyah Rigis Sugianti Rika Nanda Rio Anshari Riri Jonuarti rizka fauziah Romizah Marta Rumi Yuliska Silvi Trisna Silvi Yulia Sari Silvira Wahyuni Siti Fauziah Sovia Yulianti Suci Wahyuni Sumi Sahara Suparno Satira Surya Pertiwi Syafri Jamain Syafriani Syafriani Syafrijon Syafrijon Tia Adriany Putri Usmeldi Usmeldi Vanessa Febta Sindani Varadila Sahanaya viola sesri wahyuli Viona Zikra Yerman Wahyumin Kurnia Illahi Wahyuni Satria Dewi Yenni Darvina Yessy Arinda Putri Yohandri Yona Sri Mantia Yonira Mike Vindi Marta Yufrizal Yufrizal Yulis Septianas Sari Yulkifli Yulkifli Yulkifli Yulkifli Zaitul Hidayat Zhafrandy Eka Senida Zulhendri Kamus

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