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Physics Communication

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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 153 Documents

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Telegram Development in Dokeos-Based E-Learning As a Learning Media to Improve Students' Motivation in Learning Physics Winarto, Anton; Hardyanto, Wahyu; Sugianto, Sugianto
Physics Communication Vol 3, No 2 (2019): August 2019
Publisher : Universitas Negeri Semarang

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 (R&D). 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.

SIMULASI KENDALI PROPORTIONAL INTEGRAL DERIVATIVE DAN LOGIKA FUZZY PADA SISTEM EKSITASI AUTOMATIC VOLTAGE REGULATOR DENGAN SIMULINK MATLAB Jati, Pamungkas; Sunarno, Sunarno; Sujarwata, Sujarwata
Physics Communication Vol 1, No 1 (2017): February 2017
Publisher : Universitas Negeri Semarang

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.

PROBLEM SOLVING HEURISTIC TO DEVELOP SCIENTIFIC REASONING Wuriyudani, Hasri Arlin; Wiyanto, Wiyanto; Darsono, Teguh
Physics Communication Vol 3, No 1 (2019): February 2019
Publisher : Universitas Negeri Semarang

Scientific reasoning patterns of students formal operational base on the implementation of problem solving heuristic methods has been obtained. The aim of this research is knowing the influence of heuristic problem solving method that has been designed on practicum sheet of discovery learning model to develop scientific reasoning of students. The samples are 32 students in junior high school at 11-13 years old. The methods are CTSR test of scientific reasoning by Lawson and interview. The research design is one grup pretest-posttest. The results indicated that problem solving heuristic methods can be a factor to develop scientific reasoning of students. The lowest level of scientific reasoning (concrete reasoning pattern) is decrease 34,38%. The middle level of scientific reasoning (transitional reasoning pattern) is increase 31,25%. The highest level of scientific reasoning (formal reasoning pattern) is increase 3,13%. Heuristic methods helping students to develop scientific skills, such as setting hypotheses, modifying variables, and analyzing results of research. The scientific reasoning pattern can not be classified by age. People who has older of age has not impact in high scientific reasoning level than younger people. If someone fail on concrete aspect, it is not necessarily that person will be fail in formal aspect.

IDENTIFIKASI MODEL MENTAL MAHASISWA PADA KONSEP ATOM BERELEKTRON TUNGGAL Hermawan, Dian Wahid; Yulianto, Agus
Physics Communication Vol 1, No 1 (2017): February 2017
Publisher : Universitas Negeri Semarang

Most of physics students hold classical physics perspective when they learn quantum physics. Modeling instruction is implemented to identify mental models changing in learning quantum conceptual models. Mental model is an image created in the mind of a natural phenomenon. The conceptual model is a description of natural phenomena in appropriate with the scientists perspective. Qualitative analysis used in this research is grounded theory. The results of identification student model mental is categorized as quantum, intermediate and clasical mechanics. Students have experienced changing of dimensional understanding area from classical mechanics into a quantum perpective. The accuracy of mental model identification can be improved by making the interpretation image repeatedly.

KEEFEKTIFAN MODEL PEMBELAJARAN CREATIVE PROBLEM SOLVING BERPENDEKATAN INQUIRY TERHADAP KETERAMPILAN PROSES SAINS SISWA Sumarli, Sumarli; Nugroho, Sunyoto Eko; Yulianti, Ian
Physics Communication Vol 2, No 1 (2018): February 2018
Publisher : Universitas Negeri Semarang

Model pembelajaran creative problem solving berpendekatan inquiry mampu meningkatkan keterampilan proses sains siswa. Metode penelitian yang digunakan adalah metode kuantitatif dengan desain one-group pretest-posttest. Sampel dipilih dengan menggunakan teknik purposive sampling yang berjumlah 34 siswa di kelas X MIA5 tahun ajaran 2016/2017 pada salah satu SMA di kota Semarang. Pengumpulan data dilakukan dengan menggunakan tes berbentuk uraian dan dianalisis melalui uji ketuntasan klasikal dengan menggunakan uji Z dan uji peningkatan keterampilan proses sains dengan menggunakan uji N-gain. Model pembelajaran creative problem solving berpendekatan inquiry efektif terhadap keterampilan proses sains siswa dengan kriteria: keterampilan proses sains siswa telah memenuhi proporsi ketuntasan klasikal dengan nilai Zhitung = 1,756 > Ztabel = 1,645 dan terdapat peningkatan keterampilan proses sains siswa yaitu pada indikator mengamati dengan N-gain 0,14 (kategori rendah), indikator klasifikasi dengan N-gain 0,94 (kategori tinggi), indikator interpretasi dengan N-gain 0,41 (kategori sedang), indikator memprediksi dengan N-gain 0,81 (kategori tinggi), indikator mengajukan pertanyaan dengan N-gain 0,92 (kategori tinggi), indikator berhipotesis dengan N-gain 0,93 (kategori tinggi), indikator merencanakan percobaan dengan N-gain 0,43 (kategori sedang), indikator menggunakan alat/bahan dengan N-gain 0,90 (kategori tinggi), indikator menerapkan konsep dengan N-gain 0,32 (kategori sedang), dan indikator berkomunikasi dengan N-gain 0,89 (kategori tinggi).

IDENTIFIKASI STRUKTUR LAPISAN BAWAH PERMUKAAN LAHAN GAMBUT DI DESA ARANG LIMBUNG KECAMATAN SUNGAI RAYA KABUPATEN KUBU RAYA DENGAN METODE RESISTIVITAS KONFIGURASI DIPOLE-DIPOLE Ramadhaningsih, Laila; Sampurno, Joko
Physics Communication Vol 1, No 2 (2017): August 2017
Publisher : Universitas Negeri Semarang

Pendugaan struktur lapisan bawah permukaan lahan gambut di Desa Arang Limbung telah dilakukan dengan menggunakan metode geolistrik tahanan jenis (resistivitas). Penelitian ini bertujuan untuk memberikan informasi terkait struktur tanah dalam rangka persiapan perancangan bangunan di lokasi penelitian. Pengambilan data dilakukan pada lima lintasan dimana panjang tiap lintasannya adalah 150 m dan jarak antar lintasannya adalah 15 m. Konfigurasi elektroda yang digunakan adalah konfigurasi Dipole-Dipole dengan spasi elektrodanya adalah 15 m. Nilai resistivitas semu diinversi menggunakan perangkat lunak Res2Dinv untuk mendapatkan distribusi nilai resistivitas bawah permukaan pada tiap lintasan. Berdasarkan distribusi nilai resistivitas tersebut dapat diinterpretasikan bahwa struktur lapisan bawah permukaan lahan gambut di Desa Arang Limbung terdiri dari empat lapisan utama yaitu gambut, tanah liat berpasir, pasir basah dan batuan bercampur pasir. Ketebalan lapisan gambut bervariasi dari 2,56 m hingga 16 m. Lapisan ini berada pada posisi paling atas. Lapisan tanah liat berpasir berada pada kedalaman 2,56 m hingga 32,7 m. Lapisan pasir basah berada pada kedalaman 13,1 m hingga 30 m dan lapisan batuan bercampur pasir berada pada kedalaman 13,1 m hingga 32,7 m. Berdasarkan struktur ini maka direkomendasikan agar kedalaman pondasi bangunan yang akan dibuat di lokasi ini harus melebihi 16 m.

DEVELOPMENT OF INTERACTIVE MEDIA-BASED WAVE TEACHING MATERIALS TO IMPROVE STUDENTS' PROBLEM AND PERFORMANCE CAPABILITY Ahsani, Muh Syukri; Yulianto, Agus; Sarwi, Sarwi
Physics Communication Vol 3, No 1 (2019): February 2019
Publisher : Universitas Negeri Semarang

This study aims to produce teaching materials to improve problem-solving skills that are feasible to use as a class XII physics learning media on sound wave material. In addition, it is also to find out the response of students to teaching materials developed in terms of meeting the standards of usability and quality. This research is R & D research with design according to Borg including: needs analysis, product planning and development, product development, product evaluation, and final products. The instructional materials developed have been implemented in 63 students of class XII SMAN 5 Semarang. Data collection is done by giving a validation sheet to the senior teacher. Data on students 'problem solving abilities were obtained from the results of the pretest and posttest while the students' performance was seen from the observation of practical activities in the laboratory. Students are also given a questionnaire to provide input on the teaching materials that have been developed. The results of the study indicate that the product of development is declared feasible based on expert judgment. Implementation of teaching materials in physics learning in sound wave material is able to improve problem solving skills and student performance.

IDENTIFIKASI SEBARAN ANOMALI MAGNETIK DI PERAIRAN KABUPATEN SAMBAS KALIMANTAN BARAT DENGAN MENGGUNAKAN METODE GEOMAGNET Aripin, Aripin; Ivansyah, Okto; Sampurno, Joko
Physics Communication Vol 1, No 1 (2017): February 2017
Publisher : Universitas Negeri Semarang

The distribution of magnetic anomalies in Sambas Sea has been investigated using the Magnetic method. The raw data, which acquired, have been corrected using IGRF data and tie-line leveling to obtain the local magnetic field distribution. Then, from the corrected data obtained four anomalous zones. Next, a slice that lying on the anomalous zones (line AB, CD, EF, and GH) was made to obtain the subsurface structures which obtain using inversion method. The results show that the presence of magnetic anomalies at the lines AB, EF and GH (with susceptibility values between 1.2 to 19.2) due to the magnetite rock at the subsurface. Moreover, The presence of magnetic anomalies at the line CD (with susceptibility values of 0.3 to 3.5) is caused by ilmenite rock. The correlation coefficients between the observation data and calculated data for all lines are between 0.98 to 0.99.

ANALYSIS OF STUDENT PRACTICAL USING LOGGER PRO TO IMPROVE GRAPHIC REPRESENTATION OF HARMONIC OSCILLATION MATERIAL Dewi, Adelina Ryan Candra; Susilo, Susilo; Putra, Ngurah Made Dharma
Physics Communication Vol 2, No 2 (2018): August 2018
Publisher : Universitas Negeri Semarang

This study aims to analyze the activities of computational practicum using logger pro software to improve student graphic representation in understanding the oscillation material. The sample are 35 students of class X Mipa 3 SMA 1 Bae in 2016/2017 decided by purposive sampling technique. The research instrument is a harmonic oscillation sheet and a description test that measures the ability of graphical representation. The research method used mixed method with concurent embeded design. Analysis of research data using comparative test t paired sample test and N - Gain test of student scores. Students found some synchronous oscillation characteristics between the results of the lab and the results of the analysis of six graphs from the plot logger pro. The results of pretest and post-test average score are respectively 20.85 and 43.73. Description of comparative test statistic yields tcount> ttable which means there is significant difference between pre-test and post-test value data, and N-Gain test is 0.29 which means there is increasing value in low category. It shows computational activity using logger pro, effectively improving students' ability in multiple graph representations to understand the characteristics of harmonic oscillations.

DESKRIPSI KEMAMPUAN REPRESENTASI MATEMATIK DALAM PEMECAHAN MASALAH FISIKA PADA PERKULIAHAN LISTRIK MAGNET Harra Hau, Rambu Ririnsia; Marwoto, Putut; Putra, Ngurah Made Dharma; Wiyanto, Wiyanto
Physics Communication Vol 2, No 1 (2018): February 2018
Publisher : Universitas Negeri Semarang

Kemampuan representasi matematis dalam memecahkan masalah listrik magnet, mahasiswa akan mengungkapkan karakteristik listrik magnet. Topik listrik magnet tergolong konsep yang abstrak dan teoritis berupa matematis. Penelitian ini bertujuan untuk mendeskripsikan kemampuan representasi matematik mahasiswa dalam memecahkan masalah fisika pada perkuliahan listrik magnet. Metode penelitian yang digunakan yaitu metode deskripsi kualitatif. Subjek penelitian ini adalah mahasiswa semester IV Program Studi Pendidikan Fisika UNNES. Pengumpulan data dilakukan dengan memberikan soal pada mahasiswa yang sebelumnya telah mendapatkan materi garis medan dan hukum Gauss pada mata kuliah listrik magnet. Hasil analisis data berdasarkan langkah-langkah hasil pekerjaan mahasiswa menunjukkan bahwa kemampuan representasi matematik dalam memecahkan masalah fisika pada perkuliahan listrik magnet pada kategori tinggi dengan jumlah paling sedikit yaitu sebesar 9%, selanjutnya kategori sedang dengan jumlah mahasiswa paling banyak yaitu sebesar 75%, dan kategori rendah yaitu sebesar 16%.

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Contact Name
Teguh Darsono

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physcom@mail.unnes.ac.id

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Journal Mail Official
physcom@mail.unnes.ac.id

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Gedung A Pascasarjana Universitas Negeri Semarang Kampus Kelud Semarang

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Kota semarang,

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INDONESIA