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<![CDATA[Rancang Bangun Alat Geolistrik Berbasis Arduino Mega2560 ]]>
<![CDATA[ Physics Communication Vol 2, No 1 (2018): February 2018 ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/physcomm.v2i1.12748
<![CDATA[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.]]>
<![CDATA[Multimedia-Based Discovery Learning Approach to Improve Critical Thinking Skills and Student Learning Outcomes ]]>
<![CDATA[ Physics Communication Vol 4, No 1 (2020): February 2020 ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/physcomm.v4i1.11890
<![CDATA[The purpose of this study was conducted to determine the increase in critical thinking skills and student learning outcomes in multimedia-based elasticity learning and discovery learning. The type of research used is action class research with 3 cycles. Each cycle consists of 4 stages, namely planning (action), action (action), observation (observation) and reflection. The sample used was class XI IPA 2 SMA Negeri 2 Pekalongan. The critical thinking skills of students in cycle 1 are still in the low category, but the positive behavior of students has begun to appear. The participation of students in discussions increases. Critical thinking skills in cycle 2 increased with good categories. Students who are usually lazy have started to join the discussion. The increase in critical thinking skills occurred in the third cycle with the very good category, because in this cycle the discussion groups were divided based on the peer tutor principle. The percentage of student learning outcomes also increased to 74%. This increase can be seen in the acquisition of a gain value of 0.55 in the medium category. Multimedia-based learning with discovery learning models can be applied in learning physics so that it can improve student learning skills and outcomes]]>
<![CDATA[Aproksimasi Bragg-Williams pada Model Ising 2D: Fenomena Kritis Material Feromagnetik ]]>
<![CDATA[ Physics Communication Vol 1, No 2 (2017): August 2017 ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/physcomm.v1i2.10339
<![CDATA[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.]]>
<![CDATA[Analisis kemampuan berpikir kritis dan kreatif pada penyusunan laporan praktikum Fisika Dasar ]]>
<![CDATA[ Physics Communication Vol 1, No 1 (2017): February 2017 ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/physcomm.v1i1.8980
<![CDATA[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.]]>
<![CDATA[Descriptive Analysis of Student’s Self Efficacy in The Discovery Learning Processes ]]>
<![CDATA[ Physics Communication Vol 3, No 1 (2019): February 2019 ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/physcomm.v3i1.14990
<![CDATA[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.]]>
<![CDATA[The Effect of Practicum Activities on Improving Data Literacy for High School Students ]]>
<![CDATA[Rahmawati, Dewi]]>;
<![CDATA[Rusilowati, Ani]]>;
<![CDATA[Hardyanto, Wahyu]]>
<![CDATA[ Physics Communication Vol 5, No 1 (2021): February 2021 ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/physcomm.v5i1.34635
<![CDATA[The world change in the industrial revolution 4.0 is the state of the industry in the 21st century that combines automation and cyber technology. Education is one of the fields that is experiencing the impacts of the changes in the industrial revolution 4.0. The skills needed in this era was the literacy skills consisting of three new literacys, namely data, technological, and human literacy. The purpose of this study was to determine the effect of practicum activities on increasing data literacy of high school students. The method used in this study was a mix method with a concurrent embedded design, while the experimental design used was a one group pretest-posttest design. The instrument used was a written test with 10 numbers to get a pretest-posttest score. The pretest-posttest scores were used to measure the improvement of students' data literacy. The results of data analysis using the t-test paired samples t-test obtained the average value of the pretest and posttest scores significantly different with the value of tcount ttable that is 4.770 2.042 with an effect size of 0.83. It can be concluded that there is an effect of practicum activities on increasing data literacy of high school students with high categories.]]>
<![CDATA[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 ]]>
<![CDATA[ Physics Communication Vol 2, No 2 (2018): August 2018 ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/physcomm.v2i2.14392
<![CDATA[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.]]>
<![CDATA[Profil Miskonsepsi Calon Guru Fisika pada Materi Gerak Harmonik Sederhana ]]>
<![CDATA[ Physics Communication Vol 2, No 1 (2018): February 2018 ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/physcomm.v2i1.10876
<![CDATA[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.]]>
<![CDATA[Telegram Development in Dokeos-Based E-Learning As a Learning Media to Improve Students' Motivation in Learning Physics ]]>
<![CDATA[ Physics Communication Vol 3, No 2 (2019): August 2019 ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/physcomm.v0i0.20628
<![CDATA[Telegram Development in Dokeos-Based E-Learning as a Learning Media to Increase Students' Learning Motivation in Physics Subjects. The purpose of this study are to: (1) Determine the development of telegram in Dokeos-based e-learning as a learning media to increase students' motivation in physics subjects. (2) Analyse the effect of Telegram development learning media on dokeos-based e-learning to students' motivation. (3) Know the practicality of telegram learning media on dokeos-based e-learning according to the students. (4) Know the practicality of telegram learning media on dokeos-based e-learning according to the teacher. The type of this research is Research and Development (RD). The results showed that: (1) Telegram learning media on dokeos-based e-learning were developed through seven stages, namely: needs and literature analysis, product design, product development, small-scale trials, product revisions, large-scale trials, and the final product. The learning media developed at the "AKPELNI" Semarang Sailing Vocational School presents physics material in Class X Nautika. (2) The learning media is feasible to be used in the Semarang "AKPELNI" Sailing Vocational School on Class X Nautika students. The feasibility of instructional media based on material experts included in the category strongly agreed with an average score of 87.5, while based on the media experts included the category strongly agreed with the average score of each indicator 85.71, based on the practicality of the media by students included in the high category that was a mean score of 3.36 out of 27 students, while based on the practicality of the media by teachers also a high category of 3.47 out of 2 physics teachers. (3) The use of telegram learning media on Dokeos-based e-learning is considered effective for increasing student motivation. This is proved by the increase of the average score in the N-Gain about 0.8, which includes in the high category.]]>
<![CDATA[Simulasi kendali proportional integral derivative dan logika fuzzy pada sistem eksitasi automatic voltage regulator dengan simulink Matlab ]]>
<![CDATA[ Physics Communication Vol 1, No 1 (2017): February 2017 ]]>
Publisher : <![CDATA[Universitas Negeri Semarang ]]>
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DOI: 10.15294/physcomm.v1i1.9007
<![CDATA[AVR (Automatic Voltage Regulator) is the primary device for a generator stability, therefore performance of an AVR must be considered. Implementation of controller can be used to improve performance of an AVR. Now the controller is widely applied in industry, namely PID and fuzzy. Modelling carried out to determine the performance of AVR. The modelling of AVR system and its controller are built using Matlab Simulink. PID controller is designed by tuning method of Ziegler-Nichols (ZN) and Tyreus-Luyben (TL) while fuzzy controller is built by two input variables and one output variable, each consists of 7 MF so can be obtained 49 fuzzy rules. Based on transient response analysis, PID controller with TL method is better than ZN method and overall the comparison results of controller demonstrated that the PID controller provides a better performance in three parameters (rise time, peak time, and settling time), while the fuzzy controller provides a better performance in overshoot parameter.]]>
