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Dynamics Experiments on the Touch Panel of a Tablet Computer
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| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 60 (No. 2) |
| Halaman | : | 134–136 |
| Abstrak | : | A new system for tracking a metal ball rolling on the slope of the touch panel of a tablet computer was developed. The widespread introduction of tablets in educational environments allows the use of a convenient dynamic measurement in schools. |
Dynamic Applets for Teaching Physics
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 60 (No. 2) |
| Halaman | : | 130–133 |
| Abstrak | : | The subject of mathematics is important for many other subjects, including physics. The questions we ask in physics often need a mathematical translation to be graphically interpreted and transformed. Students learn physics when interacting with physical questions; questions from physics also give insights and discoveries in mathematical problems. In physics we often deal with questions that benefit from being illustrated with mathematical tools. A scientific theory (in physics or in another science) is an isomorphism between physical reality and a mathematical model. |
Diagnosis and Management of Paradoxical TB-IRIS
| Pengarang | : | Yovita Gotama, Ketut Suryana |
| Nama Majalah/Jurnal | : | CDK Cermin dunia kedokteran |
| Volume / Edisi | : | 52 (No. 10) |
| Halaman | : | 651-655 |
| Abstrak | : | Tuberculosis (TB) is the most common opportunistic infection in patients with human immunodeficiency virus (HIV). TB-HIV is a global burden, especially in TB endemic countries, such as Indonesia, and increased mortality. Patients with HIV need antiretroviral drugs treatment as early as possible but comorbidity with TB carries a high-risk of immune reconstitution inflammatory syndrome (IRIS), which can worsen clinical condition and increase the mortality rate. TB-IRIS is divided into 2 categories, namely paradoxical TB-IRIS in patients who have previously received TB therapy and unmasking TB-IRIS in patients newly diagnosed with TB after initiation of ARV. Clinical manifestations of TB-IRIS include worsening respiratory and constitutional symptoms, as well as the appearance of new lesions in other organs. The diagnosis of TB-IRIS requires the exclusion of other conditions such as opportunistic infections or TB treatment failure. Prevention strategies include TB screening before ARV initiation, selection of the appropriate timing for ARV administration, and the use of corticosteroids such as prednisone to reduce the risk of worsening. Management of TB-IRIS focuses on supportive therapy, inflammation control, and continuation of ARV and OAT treatment. With early detection, prevention, and appropriate management, morbidity and mortality rates due to TB-IRIS can be significantly reduced. |
Sign and Sense of an Induced Electric Current by a Nearby Moving Magnet
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 60 (No. 2) |
| Halaman | : | 128–129 |
| Abstrak | : | In one of the Faraday’s experiments an electric current is induced in a conducting loop when a magnet in front of it moves towards or away from the loop. While the direction of circulation of the electric current in the loop has only two options, it depends on three experimental conditions that generate eight cases. Even though the Faraday law or the Lenz law by itself answers for the current sense in each case, we think that a graphic synthesis of all the cases and its corresponding result is a new and interesting exercise we want to discuss. The resulting diagram is a starting point for other exercises on the induced current that a teacher might propose to their students in introductory college physics. |
Temporal Change of a Parallel Plate Capacitor’s Voltage after Dielectric Insertion
| Pengarang | : | Youngmin Oh |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 60 (No. 2) |
| Halaman | : | 124–127 |
| Abstrak | : | The capacitor is a device that can store an electric charge and has a structure with two insulated electrode plates. When a voltage is applied to the capacitor, electric charge accumulates on the plates; current flows during the charge accumulation but does not flow when the charge accumulation is complete. Dielectric inserts are made from a substance that generates a dielectric polarization when an electric field is applied to them. The capacitance C of a parallel plate capacitor filled with dielectric material can be expressed as: |
Spectral Analysis of Musical Notes as a Source of Information About Musical Instruments
| Pengarang | : | Oleksii Voronkin |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 60 (No. 2) |
| Halaman | : | 117–122 |
| Abstrak | : | The integration of physics, music, and mathematics has long been used to increase students’ interest and motivation in these subjects. For example, previous articles in this journal have shown how to teach physical concepts in a musical context, use a smartphone to check the resonant frequencies of whistles, use a smartphone to examine the spectra of sounds, and apply Fourier analysis to the study of musical intervals. This article is devoted to the audio recordings analysis of saxophone sounds, violin, guitar, piano, hand bell, and ocarina in the Audacity editor. The purpose of this analysis is to determine the amplitude-frequency structures of musical notes and obtain information for the classroom about the physical characteristics of musical instruments and some playing techniques. |
Measurement of the Velocity of Sound Through Resonance in Air Columns as a Homemade Experiment
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 60 (No. 2) |
| Halaman | : | 114–116 |
| Abstrak | : | In recent years, with the more powerful functions of smartphones, the use of sensors integrated by mobile phones as an auxiliary tool for physical experiment teaching has become more popular. Combined with the related mobile phone apps, people easily can develop and expand the physical experiment contents of mechanics, optics, acoustic phenomena, and so on. These experiments not only help students master the relevant laws of physics, but also permit or encourage students to carry out experimental research, greatly increase students’ interest in learning, and meet the training requirements of the Next Generation Science Standards. Recently, some experiments about measurement of speed of sound have been introduced. It is amazing and interesting that people can use simple tools to measure the speed of sound.­ This kind of experiment is very helpful to improve students’ practical ability in experiment design, data acquisition, and analysis. Inspired by the above experiments, especially the Kundt’s tube experiment, we demonstrate the acoustic resonance in an air column using a plastic tube, a mobile phone, a loudspeaker, and a tape measure. Through the resonance phenomenon of an air column, the speed of sound in air can be calculated conveniently. The experimental results are in good agreement with the reference value. This kind of homemade experiment can provide guidance for students to carry out relevant research in a non-laboratory environment. |
Beyond the Classroom: Profiling Muon Flux in Relation to Overburden in Fermilab’s MINOS Tunnel
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 60 (No. 2) |
| Halaman | : | 110–113 |
| Abstrak | : | With support from QuarkNet, high school students investigated the effect of overburden on muon flux by collecting data from Fermilab’s Main Injector Neutrino Oscillation Search (MINOS) tunnel. Muon flux varied due to a change in overburden created by a 103-meter deep access shaft. A profile of muon flux as a function of distance from the access shaft was measured by observing muon flux from different locations within the tunnel. |
Measuring the Speed of Earth Around the Sun Using a Classroom-Built Radio Horn Telescope
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 60 (No. 2) |
| Halaman | : | 105–109 |
| Abstrak | : | Even though many physics teachers take their students on a calculation adventure through circular motion and Newton’s universal law of gravity to determine Earth’s velocity, most of us leave it at that. We present the final result and say, “Look, Earth is moving around the Sun at about 107,000?km/hr (66,000 mph), yet we can’t feel the motion at all!” Well, thanks to an NSF-funded Research Experience for Teachers, some eager participants, a simply built radio horn telescope pointed at the center of the Milky Way, and the addition of Doppler effect considerations, we can verify our calculations through observation… science! |
Solar Eclipse and Cosmic Ray Flux
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 60 (No. 2) |
| Halaman | : | 100–104 |
| Abstrak | : | During the August 21, 2017, solar eclipse, high school students measured secondary cosmic ray flux using QuarkNet detectors. These students conducted experiments examining cosmic ray flux, shower, speed of muons, and muon lifetime using QuarkNet cosmic ray muon detectors (CRMDs). These detectors measure muon flux of momenta greater than ~2 GeV, a threshold imposed by deflection due to Earth’s magnetic field. This study utilized CRMDs, which are readily available for students, to investigate any deviation in secondary cosmic ray flux resulting from a solar eclipse. Other groups have conducted experiments regarding cosmic rays during eclipses: Kandemir et al. reported on low-energy muons (under 1 GeV) during the eclipse of August 11, 1999; Nayak et al. and Bhaskar et al. studied air showers for gamma ray point sources; and Nishina et al. studied muon flux during a 1936 eclipse. Cosmic rays are charged particles created in exploding stars and active galaxies and travel through interplanetary space at relativistic velocities. The flux is largely unchanged between day and night, when Earth blocks the Sun, and the presence of the Sun and Moon has little effect. A total eclipse provides a dramatic opportunity to search for that fraction of cosmic rays created by the Sun that are intercepted by the Moon. We hypothesized that muon flux will change during a total solar eclipse; however, we designed the experiment to search for signals at various angular scales near the direction of the Sun and to set upper limits on production from the Sun if no signal was observed. |