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9th Asian physics Symposium 2021, APS 2021

作者： Pangesti, Kurnia Ika Triyanta Master Program in Teaching of Physics Faculty of Mathematics and Natural Science Institut Teknologi Bandung Jalan Ganesha 10 Bandung40132 Indonesia Physics Department Faculty of Mathematics and Natural Science Institut Teknologi Bandung Jalan Ganesha 10 Bandung40132 Indonesia

The scientific process is conducted through investigative activities ranging from simple investigations of the surrounding nature to more complicated investigations to predict natural phenomena and solve various problems. Science learning should be carried out with a scientific approach that emphasizes scientific processes in which interactions with technology, the environment, and other sciences fields could not be avoided. Science learning through a STEM (Science, Technology, Engineering, and Mathematics) education approach is among approaches that are world-widely suggested, including in Indonesia, as can be seen in the national curriculum focal points. Unfortunately, as far as our knowledge is concerned, there is no such guide for teachers in implementing STEM education, including suggestions on the real issues and topics of STEM projects related to those issues. In this paper, based on a study of the content of the physics curriculum at the high school level, we propose real problems related to physics contents and possible STEM project topics derived from these fundamental problems. We emphasize topics that are technologically simple and easy to implement nationally, including in remote areas, but pedagogically contain rich aspects of learning. © Published under licence by IOP Publishing Ltd.

关键词： Curricula

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Determination of Motility and Charge Type of Mencit Sperm (Mus musculus) through Study of Exposure Electrical Fields 8

Determination of Motility and Charge Type of Mencit Sperm (M...

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8th Asian physics Symposium, APS 2019

作者： Trimayanti, E. Khotimah, S.N. Wibowo, I. Viridi, S. Master Program in Physics Teaching Institut Teknologi Bandung Indonesia Nuclear Physics and Biophysics Research Division Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Indonesia Physiology Animal Development and Biomedical Sciences School of Life Sciences and Technology Institut Teknologi Bandung Indonesia

Analysis of sperm quality is still one of the most important tools for evaluating a man's fertility. Sperm quality includes several aspects including motility and viability. Mice (Mus musculus) are usually used as experimental animals because the reproductive system is almost the same as human. The purpose of this study is to determine the motility, viability, and type of charge of sperm mice (Mus muculus) through the study of exposure electric fields in an ex vivo condition. Observations were made in the time At for sperm without influence and influenced by an electric field. Mice sperm is diluted with a solution of Phosphate Buffered Saline (PBS). The liquid is inserted into the hemocytometer and then placed between two iron plates connected with a DC voltage source. The distance between the two plates d = 7.0 cm. The magnitude of the voltage used is Δv = 0 (control) and Δv = 12.5 V. Sperm movement was observed using a fluorescence microscope then recorded using NIS Elements software. Then the movement of sperm is analyzed using Tracker software. Sperm without an electric field (Δv = 0) has a viability of 60 minutes longer than sperm affected by an electric field (ΔV = 12.5 V) which has a viability of 30 minutes. The sperms move almost randomly in all directions without the influence of the electric field but tend to move to a positive plate when under the influence of the electric field. Based on the direction of the movement of mice sperm, the sperm is thought to be negatively charged. From the results of this study, it was found that the fast zig-zag motion had a velocity v > 37 μm/s. © Published under licence by IOP Publishing Ltd.

关键词： Electric fields

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The role of guidance and counseling teacher in solving students'learning difficulties in physics 5

The role of guidance and counseling teacher in solving stude...

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5th International Conference on Mathematics, Science and Education 2018, ICMSE 2018

作者： Putra, D.J. Rahman, Z. Master Program in Physics Teaching Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Bandung Indonesia Master Program in Guidance and Counseling Faculty of Science Education Padang Indonesia

physics is one of the subjects that are considered difficult, by most high school students taking the science stream in Indonesia. Tthere are many students who have difficulty in learning this subject. Moreover, physics is one of the important subject when students want to continue their education to first tier universities in *** overcome this problem, this paper presents a theory that can be used by Guidance and Counseling teachers in overcoming the difficulties learning physics. The theory developed in this study can be applied by the counsellor in helping the learning difficulties of the students. This theory was developed with the literature study method which was analyzed using analytical descriptive techniques with an inductive approach. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Students

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A simple determination of air drag using video tracker and modifiable projectile launcher

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physics Education 2019年第5期54卷 055009-055009页

作者： Wijaya, P.A. Fauzi, U. Latief, F.D.E. Master Program in Physics Teaching Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Bandung Indonesia

The air drag constant for different nose shapes of projectiles is determined with the help of a simple method combining a projectile launcher, video tracking technique and spreadsheet computer code for simulating the motion. A projectile launcher with low-cost components is developed to study air drag in projectile motion. The launcher is based on air pressure and is easy to modify for different projectile types. The projectile motion is tracked using a video camera connected to a computer. The trajectory of the motion is then simulated with the help of the spreadsheet, and the air drag constant is adjusted to fit the observed data. The minimum error is used as the criteria for the best fitted air drag constant. Three types of projectiles, i.e.: conical, round, and cylindrical shape, are used in this experiment. The obtained air drag constants are in the range of 0.025-0.134. The conical shape has the lowest air drag constant as predicted. © 2019 IOP Publishing Ltd.

关键词： physics Measurement Equipment Video Technology Measurement Techniques Motion Science Equipment Science Activities Science Instruction

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Interactions of Co, Cu, and non-metal phthalocyanines with external structures of SARS-CoV-2 using docking and molecular dynamics (vol 12, 3316, 2022)

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SCIENTIFIC REPORTS 2022年第1期12卷 1-20页

作者： Alencar, Wilson Luna Machado da Silva Arouche, Tiago Neto, Abel Ferreira Gomes de Castro Ramalho, Teodorico de Carvalho Junior, Raul Nunes de Jesus Chaves Neto, Antonio Maia Laboratory of Preparation and Computation of Nanomaterials (LPCN) Federal University of Pará C. P. 479 Belem PA 66075-110 Brazil Pos-Graduation Program in Engineering of Natural Resources of the Amazon ITEC Federal University of Pará C. P. 2626 Belém PA 66050-540 Brazil Federal Institute of Pará (IFPA) C. P. BR 316 Km 61 Castanhal PA 68740-970 Brazil Chemistry Department Federal University of Lavras (UFLA) C. P. 3037 Lavras MG 37200-000 Brazil Pos-Graduation Program in Chemical Engineering ITEC Federal University of Pará C. P. 479 Belém PA 66075-900 Brazil National Professional Master’s in Physics Teaching Federal University of Pará C. P. 479 Belém PA 66075-110 Brazil

The new coronavirus, SARS-CoV-2, caused the COVID-19 pandemic, characterized by its high rate of contamination, propagation capacity, and lethality rate. In this work, we approach the use of phthalocyanines as an inhibitor of SARS-CoV-2, as they present several interactive properties of the phthalocyanines (Pc) of Cobalt (CoPc), Copper (CuPc) and without a metal group (NoPc) can interact with SARS-CoV-2, showing potential be used as filtering by adsorption on paints on walls, masks, clothes, and air conditioning filters. Molecular modeling techniques through Molecular Docking and Molecular Dynamics were used, where the target was the external structures of the virus, but specifically the envelope protein, main protease, and Spike glycoprotein proteases. Using the g_MM-GBSA module and with it, the molecular docking studies show that the ligands have interaction characteristics capable of adsorbing the structures. Molecular dynamics provided information on the root-mean-square deviation of the atomic positions provided values between 1 and 2.5. The generalized Born implicit solvation model, Gibbs free energy, and solvent accessible surface area approach were used. Among the results obtained through molecular dynamics, it was noticed that interactions occur since Pc could bind to residues of the active site of macromolecules, demonstrating good interactions; in particular with CoPc. Molecular couplings and free energy showed that S-gly active site residues interacted strongly with phthalocyanines with values of − 182.443 kJ/mol (CoPc), 158.954 kJ/mol (CuPc), and − 129.963 kJ/mol (NoPc). The interactions of Pc's with SARS-CoV-2 may predict some promising candidates for antagonists to the virus, which if confirmed through experimental approaches, may contribute to resolving the global crisis of the COVID-19 pandemic.

关键词： Computational models Computational neuroscience Computational platforms and environments Protein analysis Protein function predictions Software Virtual drug screening

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Determination of Motility and Charge Type of Mencit Sperm (Mus musculus) Through Study of Exposure Electrical Fields

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Journal of physics: Conference Series 2021年第1期1949卷

作者： E Trimayanti S N Khotimah I Wibowo S Viridi Master Program in Physics Teaching Institut Teknologi Bandung Indonesia Nuclear Physics and Biophysics Research Division Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Indonesia Physiology Animal development and Biomedical sciences School of Life Sciences and Technology Institut Teknologi Bandung Indonesia

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Textbook enriched with video augmented reality: Contextual in motion concept learning in junior high school

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AIP Conference Proceedings 2021年第1期2320卷

作者： Fauzi Bakri Wahyuni Andreas Handjoko Permana Dadan Sumardani 1Physics Education Study Program Faculty of Mathematics and Natural Sciences Universitas Negeri Jakarta Jakarta 13220 Indonesia 2Global Master Program of Teaching Profession Teachers College National Chiayi University Taiwan No. 300 Syuefu Rd. Chiayi City 60004 Taiwan China

There are many misconceptions in learning natural science in junior high school. The use of video media can reduce misconceptions. Video media will make the concepts learned more contextual. This article will describe the results of research and development of junior high school science books enriched with video media based on Augmented Reality technology so that learning is more contextual. The research used the Dick & Carey model of research and development (R&D) method. Product feasibility is tested using a questionnaire by experts. Questionnaires were developed to test the feasibility of the material, the feasibility of the media and the feasibility of learning. The results of the material feasibility test were 81.29%, with very good or very complete interpretations. Media feasibility is 93.57% with very good or very complete interpretation. The feasibility of learning 83.78% with very good or very complete interpretation. It can be concluded that the resulting textbook products received appropriate interpretations to support the contextual learning process of the concept of motion.

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The role of guidance and counseling teacher in solving students'learning difficulties in physics

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Journal of physics: Conference Series 2019年第3期1321卷

作者： D J Putra Z Rahman Master Program in Physics Teaching Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Bandung Indonesia Master Program in Guidance and Counseling Faculty of Science Education Padang Indonesia

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The Influence of Light Wavelengths Toward the Growth of Brassica rapa L.

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Journal of physics: Conference Series 2019年第1期1245卷

作者： Rizky Maiza Daniel Kurnia Master Program in Physics Teaching Faculty of Mathematic and Natural Sciences Bandung Institute of Technology Indonesia Department of Physics Faculty of Mathematic and Natural Sciences Bandung Institute of Technology Indonesia

This research aims to analyze the influence of wavelength from light source on growth of Brassica rapa L (pak choi). The lamps used in the research were 11-watt UV light, 8-watt white LED light, red LED light, green and blue 3-watt LED lights, and 150-watt infrared light, placed in boxes except infrared one. The irradiation was done in the growth box made from cardboard with size of 23 cm × 27 cm × 40 cm for 9 hours every day. The measurement done was a biometric measurement by measuring stem height, leaves width and their numbers. The observations were done for 14 days starting from the first day of planting. From the measurement result, the pak choi can grow well on white LED light. While in other light sources, it cannot grow well due the lack in wavelength needed by the plant. The experiment was further carried out by combining white LED light with blue, red and UV. The growth box was made larger with a size of 40 cm × 27 cm × 46 cm. The experimental result showed that all pak choi plants can grow well. Light using a combination of lights was useful in the development and the growth of pak choi. From the three treatments, pak choi with white LED light and UV showed faster growth for width, length and number of leaves.

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Making Counter Clockwise Analog Thermometer Under Project-based Learning Method

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Journal of physics: Conference Series 2019年第1期1204卷

作者： Rafi Candra Natasha Flaminggo Anisa Natalia Elfi Yuliza Khairurrijal Khairurrijal Department of Physics Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Indonesia Master Program in Physics Teaching Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Indonesia

The basis of this project was to explore a different kind of thermometer using a semiconductor material with an analog counterclockwise reading. The semiconductor material we used was a negative temperature coefficient (NTC) thermistor, and it was implemented in a deflection-type DC bridge circuit. To complete this project, our group followed some series of steps from Project-based Learning (PBL) method, which are: (i) finding an actual issue as the main objective of the project, Challenging Problem or Question, (ii) enlisting a series of questions to attain the main objective, Sustained Inquiry, (iii) authenticating to ensure that the project applies on existing experimental methods, Authenticity, (iv) determining the extent of the students' role in the project, Student Voice & Choice, (v) reflecting through all the processes that have passed, Reflection, (vi) gaining critique and revision in making improvements, Critique & Revision, and (vii) creating a product ready to be delivered to public, Public Product. By following a series of the PBL steps, our group successfully produced the desired product, which was Counterclockwise Analog Thermometer. Moreover, our group also gained more skills, such as critical thinking, problem solving, communication, collaboration, and self-management.

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