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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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RANCANG BANGUN ALAT GEOLISTRIK BERBASIS ARDUINO MEGA2560 Widodo, Widodo; Lapanporo, Boni Pahlanop; Jumarang, Muhammad Ishak
Physics Communication Vol 2, No 1 (2018): February 2018
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (603.72 KB) | DOI: 10.15294/physcomm.v2i1.12748

Abstract

Rancang bangun alat geolistrik berbasis Arduino Mega2560 telah selesai dilaksanakan. Alat yang dirancang dapat bekerja dengan baik. Penelitian ini berhasil membuat alat geolistrik dengan penguat tegangan s.d 350 Volt dan dilengkapi dengan fitur injeksi arus secara otomatis, sistem penyimpanan data hasil pengukuran, dan stacking chart database. Alat geolistrik yang dirancang memiliki 3 sistem utama, yaitu sistem penguat tegangan, sistem penyimpanan data dan sistem kontrol. sistem penguat tegangan yang dirancang menggunakan IC CD4047, sistem penyimpanan data menggunakan modul SD Card, dan sistem kontrol menggunakan Arduino Mega2560. Alat geolistrik yang dirancang diuji dan dikalibrasi menggunakan alat ukur standar yaitu ARES (Automatic Resistivity System). Hasil pengujian alat geolistrik yang dirancang memiliki nilai error sebesar 13,95% dibandingkan dengan alat ukur standar yaitu ARES.
APROKSIMASI BRAGG-WILLIAMS PADA MODEL ISING 2D: FENOMENA KRITIS MATERIAL FEROMAGNETIK Wibowo, Edy; Ulya, Naily; Abdullah, Mikrajuddin
Physics Communication Vol 1, No 2 (2017): August 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (772.669 KB) | DOI: 10.15294/physcomm.v1i2.10339

Abstract

Aproksimasi Bragg-Williams pada model Ising 2D material feromagnetik disajikan dalam makalah ini berdasarkan tinjauan mekanika statistik. Mekanika statistik menjelaskan fenomena fisika pada skala makroskopik ditinjau dari bentuk interaksi materi penyusun sistem tersebut. Berdasarkan tinjauan mekanika statistik, jika ungkapan energi sistem diketahui maka fungsi partisi sistem tersebut akan dapat ditentukan sehingga besaran-besaran termodinamik pada skala mikroskopik dapat ditentukan. Sistem makroskopik tersusun oleh materi dengan kuantitas yang sangat besar dengan karakteristik yang juga sangat kompleks sehingga tidak bisa lagi didekati dengan mekanika klasik. Berangkat dari permasalahan ini, Ising membangun sebuah model sederhana untuk menjelaskan fenomena pada skala makroskopoik dengan melihat keteraturan interaksi yang terjadi pada skala mikroskopik. Dengan menggunakan model tersebut, Ising berhasil menyatakan ungkapan energi total dan fungsi partisi sebuah sistem material feromagnetik. Banyak pendekatan yang telah dilakukan untuk mencari solusi model Ising ini, pendekatan yang paling sederhana adalah aproksimasi Bragg-Williams. Dari hasil aproksimasi Bragg-Williams pada model Ising 2D diperoleh informasi bahwa kemagnetan bahan feromagnetik ditentukan oleh tingkat keteraturan spin dari atom-atom dalam kristal (short-range order dan long-range order). Keteraturan spin-spin ini akan berkurang dan akhirnya lenyap saat mencapai temperatur kritis. Temperatur kritis merupakan temperatur transisi material feromagnetik dari sifat magnet ke bukan magnet. Pendekatan ini berhasil menjelaskan fenomena magnetisasi spontan dan peristiwa perubahan capasitas panas yang terjadi secara drastis pada material feromagnetik. Miskipun pada awalnya model Ising digunakan untuk menjelaskan terjadinya fenomena kritis pada material feromagnetik, namun saat ini sudah dikembangkan untuk memodelkan berbagai fenomena fisika yang lain seperti binary alloy, kisi gas, cacat kristal, ketidak teraturan material kaca, bahkan sejumlah fenomena di luar bidang fisika.
DESCRIPTIVE ANALYSIS OF STUDENT’S SELF EFFICACY IN THE DISCOVERY LEARNING PROCESSES Mufida, Husna Noor; Linuwih, Suharto; Sugianto, Sugianto
Physics Communication Vol 3, No 1 (2019): February 2019
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (36.352 KB) | DOI: 10.15294/physcomm.v3i1.14990

Abstract

This research aims to describe the state of self efficacy on the application of learning discovery learning model on harmonic vibration topic. In addition to reveal the factors that influence the increase or decrease of students' self efficacy with the application of discovery learning model. This research is a qualitative descriptive analysis research. Discovery learning model is implemented in 38 students class X MIPA 2 of SMA 1 Bae Kudus. Data collection was done by giving questionnaires, observation, and interview. Questionnaire of student?s self efficacy also has been given to determine the condition of self efficacy of students before and after the learning process implemented. The results showed that the initial self efficacy condition of students who had low initial increase although not significant. The condition of early efficacy of students before the learning process determines the level of student success in the learning process. Analysis of the first time self efficacy of students with the low category can be used as an anticipation or prevent the final learning outcomes of students do not become low.
ANALISIS KEMAMPUAN BERPIKIR KRITIS DAN KREATIF PADA PENYUSUNAN LAPORAN PRAKTIKUM FISIKA DASAR Anugrahaini, Ulya Santa; Nugroho, Sunyoto Eko; Yulianto, Agus
Physics Communication Vol 1, No 1 (2017): February 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (345.188 KB) | DOI: 10.15294/physcomm.v1i1.8980

Abstract

Practical report as one of the written works, describes the thinking ability, especially critical and creative thinking ability. Application of critical thinking is intended to generate seports that can be understood by the reader comprehensively. The application of creative thinking ability is used to bring up the aesthetic results of lab reports. This study aimed to analize the critical and creative thinking ability and patterns in the preparation of the basic physics lab results. The research data applying cocument analysis, questionnaire, and confirmed by an interview given to students of Physical Education. Grounded theoriy is used to analize this study. The results showed that students critical thinking ability tha are in medium and high category whose are different pattern. Differences in pattern between students ability to think high and medium category critically is located on the caracteristics of those key issue on the basic components of the theory that clarivy the terms of physics (definition, examples, and background), clarivying the mathematical equations used to provide meaning and reveal facts that are pailored to the theory on the data analized component. Diffrences capable of creative thinking ability of students high and medium categories is located in the birth of new ideas coming from students thinking practitioner in the preaparation of the component of interest, and detailing and object so that it is more valuable to describe the tools anda materials used for practical implementation.
A STUDY OF STUDENT’S MISCONCEPTION ON LIGHT MATERIAL AND HOW TO REDUCE IT USING LKS-ASSISTED PBL AT ISLAMIC JUNIOR HIGH SCHOOL (SMP IT) BINA AMAL SEMARANG Damayanti, Heru; Sarwi, Sarwi; Astuti, Budi
Physics Communication Vol 2, No 2 (2018): August 2018
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (163.157 KB) | DOI: 10.15294/physcomm.v2i2.14392

Abstract

The existence of misconceptions could affect students? problem solving ability in physics subject. The source of misconceptions could be derived from the text books that used by the students, from the students itself, as well as from the teachers. One of the learning models that might reduce the misconceptions on the topic of light was worksheets-assisted by problem based learning model. The purpose of this study was to identify the misconceptions experienced by the students of SMP IT BinaAmal on the topic of light, to analize misconceptions on the topic of light, to identify the descriptions of the students? improvement on the concept of light, and to identify the worksheets-assisted problem based learning could develop the students? scientific attitudes. The research method used mixed methods research using sequential explanatory design with pre-test and post-test Control Group Design. The sample of this research was the IX grade students of Hafshoh bint Abu Bakar class, and the IX grade students of Zaenab bint Jahsyi at SMP IT BinaAmal Semarang. The instruments that used in this study were questions and observation sheets. Based on the calculation of problem-solving test, in the experimental class obtained a gain factor of 0.553 with medium criteria, while the control class produces a gain factor of 0.249 with low criteria. The initial t-test shows thitung (-1.55) <t table (1.68) that the experimental class is no better than the control class. The final t test shows thitung (2,481)> t table (1.68) that the experimental class is better than the control class after the LKS-assisted PBL learning model is used. A very strong relationship between conceptual mastery and the reduction of misconceptions. LKS-assisted PBL learning influenced the results of the decrease in student misconceptions from 55.1% to 19.5% in the experimental class and a decrease in misconception from 59.4% to 31.9% in the control class. Based on the results of cognitive tests, obtained a qualitative data analysis, misconception that occurred in SMP IT Bina Amal on the concept of light, among others: regular reflections and diffuse; shadow formation, shadow space and shadow properties, light propagation; light sources and human processes can see things; and the law of refraction. Based on the result of the research, it is found that the LKS-based problem-based learning model is effective to reduce light misconception.
PROFIL MISKONSEPSI CALON GURU FISIKA PADA MATERI GERAK HARMONIK SEDERHANA Mahen, Ea Cahya Septia; Nuryantini, Ade Yeti
Physics Communication Vol 2, No 1 (2018): February 2018
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (711.716 KB) | DOI: 10.15294/physcomm.v2i1.10876

Abstract

Mata kuliah Fisika Dasar memiliki peran penting, khususnya bagi mahasiswa calon guru Madrasah Aliyah di Program Studi Pendidikan Fisika. Namun, pada perkuliahan yang penting ini masih terdapat mahasiswa yang kesulitan pemahaman karena tidak tahu konsep maupun miskonsepsi. Untuk mengetahui hal tersebut, kami menggunakan teknik CRI (Certainty Response Index) yang dimodifikasi untuk menganalisis kesulitan pemahaman konsep mahasiswa calon guru Fisika. Metode yang digunakan dalam penelitian ini adalah metode deskriptif kuantitatif dengan desain yang dipilih adalah one shoot case study. Deskripsi dan interpretasi statistik digunakan untuk analisis data. Sampel yang dipilih, yaitu seluruh mahasiswa calon guru di Program Studi Pendidikan Fisika semester 1 tahun ajaran 2015/2016 yang berjumlah 90 orang. Berdasarkan teknik CRI yang dimodifikasi pada materi elastisitas dan gerak harmonik sederhana didapatkan kelompok tidak tahu konsep (36,8%) dan miskonsepsi (32,2%) selanjutnya tahu konsep (28,6%) dan sebagian kecil (2,5%) tahu konsep tetapi kurang yakin.
Conductivity of Groundwater In Semarang City Pinandita, Satria; Puji Lestari, Diah Aryati; Purwanti, Hani
Physics Communication Vol 3, No 2 (2019): August 2019
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v0i0.25580

Abstract

Semarang is the capital of Central Java Province and is the most developed city in Java island. This city is one of the most important cities in the north coast of Java. Most of Semarang’s landscape consists of lowland areas that become floodplain of the large rivers that flow through the city. Water is not only used for drinking but also for other necessities such as bathing, washing, agricultural and industrial needs, electricity generation, etc. The objective of this study was to determine the conductivity value of groundwater from several locations in Semarang as the conductor of electricity. This study used groundwater samples from seven locations in Semarang. The tests conducted including TDS (Total Dissolved Solid) test by inserting TDS meter into the water and recorded the value after 3 seconds of observation. The conductivity test was done by water electrolysis using a buzzer circuit. The test was conducted by inserting the electrode into the water for 3 seconds, then observed the buzzer sounding (soft or loud). Afterward, the water temperature was recorded using the thermometer. Results of this study showed the different water conductivity of groundwater collected from different locations. The lowest conductivity was obtained from S-1 sample with TDS value of 50 ppm, while the highest conductivity was obtained from S-7 sample with TDS value of 549 ppm. The higher the TDS and temperature value, the higher the electrical conductivity. 
Conceptual Problem Solving and Student's Empirical Inductive Reasoning in Elasticity Subject Mulyati, Restina Muji; Nugroho, Sunyoto Eko; Sulhadi, Sulhadi
Physics Communication Vol 4, No 1 (2020): February 2020
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v4i1.26408

Abstract

Conceptual problem solving skills are one of the factors for student success in learning physics. Problem solving skills have a close relationship with reasoning skills. This study aims to analyze conceptual problem solving and student’s empirical inductive reasoning in learning physics in elasticity subject. This study used a quasi-experimental method with a one-shot case study research design. The research data were obtained from written tests. For conceptual problem solving skills, the average score percentage for principle aspects was 50.79%, justification aspects 3.17%, and plan aspects 38.49%. The results showed that the aspects of student justification in the elasticity subject were still low. Students have not been able to provide a complete explanation of why a principle or law of physics applies to a problem. For empirical inductive reasoning skills, the percentage score for the class inclusion pattern average was 31%, the conservation pattern was 10%, and the serial ordering pattern was 38%. Students have not been able to apply conservation thinking to an object, meaning that students do not understand that if nothing is added or removed from an object, then the properties or characteristics of the object will remain the same even though their appearance is different. The research results are expected to provide benefits, namely: (1) for students, as motivation to improve learning performance so that good learning outcomes are achieved, and (2) for teachers, as a basis for applying appropriate learning methods to develop student’s conceptual problem solving and empirical inductive reasoning skills.
The Use of Video as Teaching Media to Improve SMPN 1 Wonosalam Student Understanding on The Topic of Simple Machine Millah, Isna Lukluil; Ellianawati, Ellianawati
Physics Communication Vol 4, No 1 (2020): February 2020
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v4i1.11789

Abstract

The purpose of this research is to investigate the understanding of physics concept on the topic of simple machine through the application of learning media assisted discovery model. This pre- experimental study used pre-test – post-test. The sample of the research is the students of class VIIIG SMP Negeri 1 Wonosalam Demak academic year 2019/2020. The concept comprehension test results were analyzed using the n-gain test of the mean score and interview questionnaire. The average value of pretest 54 and the average post-test score increased to 87. The gain test results showed the high category. It was concluded that discovery-assisted learning model of video media teaching materials improved the student’s understanding of the concept of simple machine topic.
Modification of The Gasik Game version 2.0 to improve 21st Century Skills for Junior High School Haya, Frilisa Dliyaul; Hartono, Hartono; Sulhadi, Sulhadi
Physics Communication Vol 4, No 1 (2020): February 2020
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v4i1.29271

Abstract

The 21st-century skill standards in Indonesia include 4Cs (critical thinking, creativity, communication, and collaboration); ICTs (Information, Media and Technology Skills); Character Building; and Spiritual Value. All 21st-century skills need to be possessed by students as a provision to face all the challenges of life. Therefore, we need a guide who can instill all skills. The purpose of this study was to improve the students' 21st-century skills.  The 21st-century skills in this study focused on increasing 4Cs skills. The development model used is Analyze, Design, Develop, Implement, and Evaluate (ADDIE Model). Research subjects were 75 eighth-grade students of junior high school. Data collection method used was an experimental method. Data collection used a product assessment questionnaire, an observation rubric of 21st-century skills, and tests. Meanwhile, the product content validity test uses the v Aiken index. The modified Gasik game (Gasik version 2.0) received ratings from the experts on the material aspect of 83.68% and in the media aspect of 87.61%.  The value of the content validity v Aiken is 0.82 with a high category so that the Gasik 2.0 game can be stated as very good to be applied to 21st-century learning. The n-gain value between the pretest and posttest values in the experimental class is 0.12, while in the control class is -0.01. The results of the analysis indicate that the use of the Gasik 2.0 game can grow 4Cs skills with low categories.

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