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Physics Communication
Published by Universitas Negeri Semarang
ISSN : 25285971     EISSN : 2528598X     DOI : https://doi.org/10.15294/physcomm
Core Subject : Science,
Physics
Physics Communication is devoted to reporting important new developments in the area of physics. Papers cover the fields of: atomic and molecular physics condensed matter and theory of statistical physics nuclear theory fluid theory and plasmas elementary particle physics and quantum field theory quantum mechanics and quantum optics theoretical astrophysics cosmology relativity Certain new interdisciplinary subjects such as theoretical biophysics, mathematical physics and computational physics are also incorporated.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 168 Documents
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Determination of Neutron Flux in Brain Cancer Boron Neutron Capture Therapy Using Monte Carlo Simulation Arianto, Fajar; Handayani, Liska Tri; Budi, Wahyu Setia; Basuki, Prasetyo
Physics Communication Vol 6, No 2 (2022): August 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v6i2.40277

Abstract

Boron Neutron Capture Therapy (BNCT) is a relatively safer technology for killing cancer cells, one of which is the Glioblastoma multiforme. One of the main components of the BNCT equipment is the collimator which functions as an exit point for epithermal neutron particles that hit cancer cells. In addition to the experimental method, BNCT research can be carried out by modeling, including using the MCNPX software based on the Monte Carlo Method. This research aimed to determine the flux distribution of fast and epithermal neutrons and the dose rate of fast neutrons and gamma that hit the target cancer cells in the phantom head of ORNL MIRD. Modeling using the MCNPX software has three main parts: cell cards, surface cards, and data cards. A tally is used on the data card to calculate the neutron flux. Based on the calculation of the modeling results, the flux of epithermal neutron is 2.87 x 109 n/cm2.s. The dose ratio of the epithermal to the fast neutron flux is 2.29 x 10-14 Gy.cm2/n. Then, the balance of the dose rate of the epithermal to the gamma is 1.64 x 10-14 Gy.cm2/n, and the ratio of epithermal to thermal neutron flux is 0.004. In this study, the epithermal neutron flux hitting the target cancer cells in cell target was moderated at 4 cm so that at a depth of 8 cm, the energy was converted into thermal neutrons. Based on the analysis of the results, it can be concluded that the neutron flux that will interact with cancer tissue is thermal neutrons, not epithermal neutron flux.
Quality Of Lighting In Regular And Fullday Class Tsanawiyah Miftahul Huda Tayu Pati Solichah, Solichah; Yulianti, Ian
Physics Communication Vol 6, No 1 (2022): February 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v6i1.33942

Abstract

An analysis of the quality of the lighting level in the classroom needs to be carried out to determine the existing lighting level. If the level of lighting is below the specified standard, it can cause eye damage.  Meanwhile, if the level of lighting is above the standard, the classroom will be too bright. The purpose of this study was to determine the level of lighting in the Regular and Full Day classroom of  MTs. Miftahul Huda Tayu. The tools and materials used in this experiment are lux meter, roller meter and thermohygro. The experiment was carried out in the Regular class school building and the Full Day classroom building with a sample of three rooms per building with each room representing each floor. The experiment was carried out during the day for three consecutive days. There are two types of the intensity measured in this experiment, namely natural intensity (lights off) and natural artificial intensity (lights on). In each room, 9 points were taken. The floor area and window area were measured using a roller meter. From the experiments that have been carried out, it can be concluded that the lighting in the Regular class (17-73 lux) and Full Day class (97-181 lux) buildings do not meet Indonesian National standards (Standar Nasional Indonesia, SNI).
Pancasila Student Profiles in Science Lessons and Potential for Strengthening by Developing PjBL-Based E-Modules Imania, Yayang Fatma; Marwoto, Putut; Ellianawati, Ellianawati
Physics Communication Vol 6, No 2 (2022): August 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v6i2.36755

Abstract

This study aims to find out class VII students’ profiles of Pancasila abilities of MTs SA Miftahul Huda Bumijawa. The dimensions of the meticulous Pancasila student profiles include four dimensions, namely critical reasoning, creativity, mutual cooperation, and independence. This type of research is a qualitative descriptive. Data collection instrument were observation and interview guidelines. Based on research data, the results showed that the ability of students to the Pancasila student profiles were still very low. 70% of students were in category of very low and another 30% were in category of low on the critical reasoning dimension. 57% of the students were in category of very low and another 43% were in category of low on the independent dimension. Overall students where in category of very low on the dimensions creative and mutual cooperation dimensions. It indicates that the applied learning media and learning models have not been able to strengthen Pancasila student profiles. The Integrated Science learning process still uses conventional methods and rarely does practicum or projects. The media used is still limited to textual. One of the potential solutions in order to strengthen the Pancasila student profiles are to develop an e-module based PjBL.
Development of Cognitive Ability Test Instrument Based on Revision Bloom Taxonomy on Dynamic Electricity Materials For Students of Senior High School Nurmaya, Eka; Rusilowati, Ani; Astuti, Budi
Physics Communication Vol 6, No 2 (2022): August 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v6i2.37028

Abstract

This study aims to develop a cognitive ability test instrument based on Bloom's taxonomy revision. The test instrument covers the cognitive domains C1 (remembering), C2 (understanding), C3 (applying), C4 (analyzing), C5 (evaluating), and C6 (creating). The research was carried out using research and development methods using a 4-D development model (Define, Design, Develop, Disseminate). The research data obtained is analyzed quantitatively to determine the validity, discriminatory power, reliability, and level of difficulty of the cognitive ability test instrument. Results of research based on the analysis of the validity test showed that the test instrument was declared valid by material experts and evaluation experts with an average value of 92.65. Based on the analysis of the validity of the item validity test, there are two invalid questions, namely questions number 2 and 10. Based on the results of analyzing differentiating power, the results of question number 20 are obtained, 64 for essay questions. Based on the analysis of the level of difficulty, the results showed that the test instrument was at 5% percent of the questions at the difficulty level, 20% at the sufficient level, 70% at the medium level, and 5% at the easy level. Overall, the test instrument is valid, reliable, has good discriminating power, and has varying levels of difficulty.
Analysis of Four-tier Diagnostic Test on The Topic of Temperature and Heat in High School Asih, Nur Fitri; Linuwih, Suharto; Fianti, Fianti
Physics Communication Vol 6, No 1 (2022): February 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v6i1.36652

Abstract

This study aims to analyze the feasibility of the four-tier diagnostic test items given to class XI high school students. This research is a quantitative descriptive study, which collects student answer sheets as data which is then analyzed for item selection, reliability, level of difficulty, discriminating power, distractor functioning, and readability test. This research was conducted on 30 students of class XI at SMA N 1 Slawi. The results concluded that in the selection of items from the 21 questions made, there were 16 items that were suitable for use and 5 items that were not suitable for use. In the reliability of the questions obtained by the reliability value of rcount of 0.760. In the level of difficulty, there are 5 questions in the easy category, 14 questions in the medium category, and 2 questions in the difficult category. In the differentiating power, the questions in the good category are 8 questions, the sufficient category is 8 questions, and the bad category is 5 questions. In the distractor function there are 10 questions whose distractors function well and 11 questions whose distractors do not function properly. Readability test questions according to student assessment questionnaires, four-tier diagnostic test questions are categorized as good to use.
Analysis of Teacher Roles and Student Problem Solving Skills in Learning Physics Online Collaborative Problem Solving Lurinda, Nadia Wahyu; Nugroho, Sunyoto Eko; Khumaedi, Khumaedi
Physics Communication Vol 6, No 2 (2022): August 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v6i2.38183

Abstract

The development of education needs to adapt to the needs of 21st century skills, including collaboration and problem solving. This study aims to analyze and describe the profile of Collaborative Problem Solving (CPS) online learning, as well as to describe the problem solving skills after learning. This research was conducted at SMA N 1 Gubug in class XI MIPA 1 for the academic year 2021/2022 with a qualitative descriptive method. CPS online learning is divided into virtual meetings using Microsoft Teams and discussions via text messages in WhatsApp. The research data was obtained through data observation’s, interviews, and written posttests. Data processing using a fixed comparison method with three stages, namely; data reduction, categorization, synthesis, and determination of hypotheses. The results showed that the role of the teacher appeared with almost the same frequency, namely as a motivator (37%), communicator (32%) and facilitator (31%). Students' problem-solving skills are dominated by the ability to plan and identify problems with the frequency of occurrence of 35% and 31%, respectively. The next two stages of problem solving, namely implementing the plan and checking back only appeared with a percentage of 19% and 15%. 
Analyzing Physics Learning to Determine the Character and Self-Efficacy of High School Students Hadijah, Siti; Sarwi, Sarwi; Masturi, Masturi
Physics Communication Vol 6, No 1 (2022): February 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v6i1.34463

Abstract

Research has been carried out to analyze learning based on the character and friendly attitude of students. The purpose of this study is how the character and self-interest of students in learning physics in a learning model. The research design used was quantitative research with survey research. The research sample was public high school and private high school in Semarang. The instrument used was a questionnaire using a google form. The results of this study were the lack of student character in learning, one of which was the student's curiosity in learning with a character proportion of 48%. Then, the proportion of students' self-confidence or self-confidence is still classified as low category. Students who lack confidence in their achievements and in doing assignments at school can affect learning models that are less precise and effective.
Study of a Weather Prediction System Based on Fuzzy Logic Using Mamdani and Sugeno Methods Setyanugraha, Noval; Al Aziz, Sofyan; Harmoko, Iis Widya; Fianti, Fianti
Physics Communication Vol 6, No 2 (2022): August 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v6i2.39703

Abstract

Weather is a very important factor in supporting various human activities. However, weather is a natural event that keeps on changing due to various air conditions that affect it. One way to anticipate weather changes that may occur early is to create a system that can predict weather changes. Fuzzy logic is one of the methods that can be used in system prediction to find out the cause at a certain time and place. In this system, two fuzzy logic methods were used, they are the Mamdani and Sugeno methods, with three supporting criteria, including air temperature, humidity, and air pressure. In this research, data levers were carried out in June 2022 and resulted in a percentage accuracy of 73.34% for the Mamdani method and 70% for the Sugeno method.
Recycling Surgical Mask as Acoustic Panel using Hand Lay-Up Methods Fatmala, Rita Iva; Yulianti, Ian; Fianti, Fianti
Physics Communication Vol 6, No 1 (2022): February 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v6i1.33898

Abstract

The research was conducted to recycle surgical masks as acoustic panels using hand lay-up methods and to test their effectiveness in reducing noise using the tube method. The frequency used as a sound source is 495 Hz. Tests were carried out with variations in panel thickness, they are 1 cm, 2 cm, 3 cm, 4 cm, and 5 cm and three variations composite material, they are first layer, second layer and third layer of surgical mask. The panel test results show that the thicker acoustic panels are more effective in reducing noise based on the regression analysis that show the thicker panel from three variations composite material is 0.98, 0.99 and 0.96, respectively all of which are included in the very strong category. In addition, ANOVA analysis show that the thicker panels from all variation composite material respectively was 0.002, 0.001 and 0.009, they are showed the significant effect between the thickness of the panel and the effectiveness of the panel in reducing noise. Furthermore, based on the regression analysis from acoustic panels composite made of surgical masks from first layer, second layer and third layer were 8.24, 8.39 and 5.81, respectively the panel acoustic from second layer surgical masks are more effective to reduce the noise than other layer. Overall, it can be concluded that acoustic panels made of surgical masks are effective in reducing noise, as well as a solution to increasing surgical mask waste during the Covid-19 pandemic.
The Examination of the Wien’s Displacement Constant with Simulation and Simple Numerical Approaches Aprilia, Riana; Alifaturrohmah, Marisa; Purnama, Gilang; Wahyuni, Siti
Physics Communication Vol 6, No 2 (2022): August 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v6i2.39821

Abstract

The purpose of this research  was to examine the value of the Wien’s constant using PhET Simulation virtual laboratory and simple numerical approach. The independent and dependent variable is blackbody temperature (T) and maximum wavelength (λ_max). In the use of a virtual laboratory, research is carried out by shifting the black body temperature feature so  the graph will display a spectral power density that varies to the wavelenght. Numerical approach was used in this research is Newton Raphson methods by Python program. Both of simulation and numerical approach yield the value of the maximum wavelength (λ_max) for a black body temperature variation. The black body temperatures and their appropriate maximum wavelength data then analyzed using linear regression. Final result show that value Wien’s constant using PhET is 2,93 × 10-3 mK with relative error obtained is 1,07 % while using Newton Raphson the Wien’s constant value obtained is 3,07 × 10-3 mK with relative error is 5,90 %. The two approachs carried out produce data that slightly different, but still in a very good accucracy range when compared with theory. So, PhET Simulation and Newton Raphson methods effective to examine the value of the Wien’s constant.

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