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All Journal Jurnal Kependidikan: Penelitian Inovasi Pembelajaran JIPF (Jurnal Ilmu Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS COMPTON: Jurnal Ilmiah Pendidikan Fisika Jurnal Fisika Indonesia Wahana Fisika : Jurnal Fisika dan Terapannya Jurnal Pendidikan MIPA
Restu Widiatmono
Physics Study Program Universitas Negeri Yogyakarta, Yogyakarta
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Materials Science & Nanotechnology Physics

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EFEKTIVITAS PEMBIMBINGAN KARYA TULIS ONLINE MELALUI WEBSITE KTI Herman Dwi Surjono; Sri Sumardiningsih; Dyah Respati Suryo Sumunar; Restu Widiatmono
Jurnal Kependidikan Vol. 43, No.2 (2013)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jk.v43i2.5732

Abstract

Penelitian ini bertujuan untuk mengevaluasi Sistem KTI Online untuk pembimbingan penulisan karya ilmiah bagi guru-guru. Aspek yang diungkap antara lain: deskripsi teknik, strategi, aktivitas pembimbingan, hambatan dosen, dan tingkat efektivitas pembimbingan. Obyek yang diteliti adalah sistem pembimbingan KTI online yang telah dikembangkan oleh Dirprodik Dit PMPTK. Sampel sebanyak 12 dosen dan 500 guru diambil secara purposif. Instrumen penelitian terdiri atas 3 macam, yaitu daftar cek (check list) untuk evaluasi sistem, angket untuk dosen pembimbing dan angket untuk guru peserta. Hasil penelitian adalah sebagai berikut: (1) Website KTI Online telah dikembangkan dengan menggunakan perangkat lunak LMS open source Moodle, (2) Strategi pembimbingan yang diterapkan adalah model terbuka melalui forum diskusi, (3) Aktivitas pembimbingan sangat rendah, yakni hanya 143 guru (24.2 %) yang telah berhasil login, (4) Hambatan utama antara lain akses internet sangat lambat dan ketidakaktifan guru dalam pembimbingan, (5) Tingkat efektivitas program pembimbingan ini sangat rendah.
Pengembangan Sistem Deteksi Gas CO pada Gas Hembus Manusia Berbasis Spektroskopi ICOS (Halaman 35 s.d. 38) Restu Widiatmono; Julien Mandon; Frans J. M. Harren; Kusminarto -; M. A. Joko Wasono; Mitrayana -
Jurnal Fisika Indonesia Vol 18, No 52 (2014)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (915.445 KB) | DOI: 10.22146/jfi.24402

Abstract

Pengembangan sistem deteksi gas hembus pernapasan manusia yang memiliki kepekaan tinggi telah dilakukan dalam penelitian ini. Laser QCL (Quantum Cascade Laser) kontinyu dengan panjang gelombang 4610 nm sebagai sumber radiasi yang dikombinasikan dengan teknik spektroskopi off-axis ICOS (integrated cavity output spectroscopy) digunakan untuk medeteksi gas Karbon Monoksida (CO) bertekanan rendah. Sel sampel gas dengan panjang 15 cm yang dilengkapi dengan cermin high-finesse sekaligus berfungsi sebagai rongga resonator laser dengan lintasan optik efektif mencapai 400 m. Batas deteksi sebesar 1 ppbv dalam waktu akuisisi kurang dari 2 detik telah berhasil dicapai. Pendeteksian kasar pada gas hembus pernapasan manusia telah berhasil mendeteksi gas CO sebesar 0,7 ppmv.  
Compressibility Effects on Turbulent Heat Transfer of Natural Convection in a Square Cavity Rida Siti Nur'aini Mahmudah; Restu Widiatmono; Denny Darmawan
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 13, No 2 (2023): IJAP Volume 13 ISSUE 02 YEAR 2023
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v13i2.75790

Abstract

Heat transfer in turbulent flows is one of the essential topics in power plants and thermal-based engineering. This study aims to analyze the effects of density changes due to heat transfer in a turbulent environment—which is usually neglected because it can cause instability in a simulation. We simulate an available experimental case of turbulent heat transfer of air with OpenFOAM: one with an incompressible approach (no density change) and another with a compressible treatment. The simulation geometry is a 0.75 × 0.75 m2 square cavity, where its left and right walls are kept at a temperature difference of 40 K. We compare and analyze the temperature, velocity, and turbulence kinetic energy profiles of both simulation results against the experimental data. We found that from all qualitative and quantitative comparisons, the change in density plays a vital role in turbulent heat transfer. The compressible treatment gives better results than the incompressible: the neglection of density change causes a significant difference with the experimental data. Thus, we strongly recommended incorporating compressibility in simulating heat transfer in turbulent flows.
Simulasi Dinamika Fluida Dam Break 2D Menggunakan Metoda Beda Hingga Skema Forward Time Backward Scheme (FTBS) Ilham Adi Panuntun; Rida SN Mahmudah; Restu Widiatmono; Denny Darmawan
Wahana Fisika Vol 7, No 1 (2022): June
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v7i1.46974

Abstract

Dam break merupakan salah satu simulasi dasar dalam komputasi dinamika fluida yang sering digunakan sebagai benchmark. Penelitian ini bertujuan membuat simulasi dam break 2D menggunakan metoda beda hingga skema Forward Time Backward Scheme (FTBS) yang tervalidasi oleh solusi analitis dan hasil dari penelitian sebelumnya. Pada penelitian ini, dibuat solusi numerik untuk persamaan Shallow Water (SWE) atau Saint-Venant yang didasarkan pada kekekalan massa dan momentum yang diturunkan dari persamaan Navier-Stokes. Kode simulasi  numerik dibuat menggunakan metoda beda hingga yang merupakan metoda paling umum dan paling sederhana untuk pemodelan dam break. Skema numerik yang digunakan adalah Forward Time Backward Scheme (FTBS). Pada tahap awal, dibuat simulasi dam break 1D yang hasilnya divalidasi dengan solusi analitik. Dari hasil analisis data, diperoleh nilai RSME yang relatif kecil, yaitu 0,0076. Selanjutnya, code tersebut dikembangkan untuk membuat simulasi dam break 2D yang hasilnya dibandingkan dengan penelitian sebelumnya. Hasil  perbandingan secara kualitatif dan kuantitatif menunjukkan bahwa code simulasi 2D yang dibangun dengan FTBS dapat merepresentasikan fenomena dam break dengan cukup memuaskan.
Pembangkitan Terahertz pada Metamaterial Chiral Menggunakan Spektroskopi Emisi Terahertz Juliasih Partini; Restu Widiatmono
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 9, No 02 (2019): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (743.868 KB) | DOI: 10.13057/ijap.v9i2.32438

Abstract

Metamaterial adalah material buatan dengan indeks bias negatif dan secara simultan memiliki permitivitas elektrik dan permeabilitas magnetik bernilai negatif. Pengembangan metamaterial mengalami terobosan dengan munculnya struktur metamaterial baru yang disebut sebagai metamaterial struktur chiral sebagai sumber radiasi terahertz (THz). Pengukuran sinyal emisi THz dilakukan menggunakan sistem spektroskopi emisi terahertz dengan sistem laser Ti:Sapphire femtosekon sebagai sumber radiasi. Sampel metamaterial chiral dengan ukuran panjang 1,2 mm, lebar 0,3 mm dan kedalaman 0,3 mm susunan 300 struktur dengan arah putar kanan dan putar kiri. Kedua sampel mampu membangkitkan emisi gelombang THz dalam jangkau frekuensi 0 - 2,24 THz. Proses rektifikasi optik diperlihatkan oleh adanya pembangkitan gelombang THz pada sampel metamaterial chiral oleh laser femtosekon. Hasil eksperimen memperoleh hubungan kuadratik antara energi laser pemompa dengan amplitudo gelombang THz. Hal ini dapat disimpulkan bahwa metamaterial chiral persegi dengan kedalaman berbeda telah berhasil membangkitkan emisi gelombang THz yang terpolarisasi eliptik.
Developing E-LKPD based on Creative Problem Solving to Enhance Higher Order Thinking Skills and Learner Autonomy in Topics Related to Progressive and Standing Waves Rachmah, Diah Nur; Widiatmono, Restu
JIPF (Jurnal Ilmu Pendidikan Fisika) Vol 10, No 2 (2025): May 2025
Publisher : STKIP Singkawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26737/jipf.v10i2.6237

Abstract

This study aims to produce a valid, practical, and effective E-LKPD utilizing Creative Problem Solving (CPS) approach to enhance both Higher Order Thinking Skills (HOTS) and the independent learning attitude of students in topics related to progressive and standing waves. The research method employed was Research and Development utilizing the 4-D development design model, which includes the phases: Define, Design, Develop, and Disseminate; however, Disseminate phase was not implemented. The validity of the E-LKPD CPS was assessed by material and media validators. Its practicality was evaluated based on the feasibility of implementing the E-LKPD CPS during the learning process as observed. The effectiveness of the E-LKPD CPS was determined through N-gain tests, while user response was gathered via response questionnaire. Data analysis was conducted using quantitative descriptive methods. The E-LKPD CPS was pilot-tested in a limited setting at MAN 2 Yogyakarta, involving 33 MIPA 1 as experimental group and another 33 as control group (MIPA 2). The E-LKPD CPS received validity scores of 97.47% from content experts and 95.48% from media experts, both considered very valid. Its practicality scored at 84.08% (good). The effectiveness of the E-LKPD CPS in enhancing HOTS was demonstrated with experimental group N-gain of 70.69%, compared to the control group's 63.70%, both deemed moderately effective. The effectiveness in fostering independent learning attitudes yielded N-gain of 74.28% for the experimental group and 67.23% for the control group, also rated as moderately effective. Student response was highly favorable at 91.33% (very good). Consequently, the developed E-LKPD CPS is declared valid, practical, and effective for implementation in educational settings.
Pengembangan Video Interaktif Praktikum Gerak Parabola untuk Meningkatkan Keterampilan Proses Sains Siswa Izza Fauzia; Widiatmono, Restu
COMPTON: Jurnal Ilmiah Pendidikan Fisika Vol 11 No 1 (2024): Compton: Jurnal Ilmiah Pendidikan Fisika
Publisher : Prodi Pendidikan Fisika Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/cjipf.v11i2.20354

Abstract

This study aims to (1) develop an interactive video tutorial design for a parabolic motion practicum that is appropriate and feasible to enhance students’ science process skills; (2) evaluate the quality of the developed video in supporting the targeted skills; (3) examine the practicality of implementing the media in classroom settings; and (4) assess its effectiveness in improving students’ science process skills. The media development process was guided by instructional design principles, incorporating elements such as visual appeal, user interface, curricular alignment, science process skill integration, graphical representation, and overall pedagogical utility. Expert validation results indicated that the video tutorial possessed a very high level of quality in both content and presentation. Practicality was confirmed through positive feedback from students and favorable evaluations from physics teachers, highlighting the video’s usability and relevance in real classroom contexts. Furthermore, the effectiveness of the video was statistically validated using a Multivariate Analysis of Variance (MANOVA), yielding a significant p-value (p < 0.001), alongside a high N-Gain score of 0.91, suggesting a substantial improvement in students’ science process skills. These findings demonstrate that the developed interactive video is a valid, practical, and highly effective educational tool for supporting inquiry-based learning in physics, particularly in the context of parabolic motion experiments.
Development of Problem-Based Physics E-Book on The Topics of Work And Energy to Improve Students' Conceptual Understanding and Digital Literacy Artanti, Francisca Happy; Widiatmono, Restu; Jumadi, Jumadi
Jurnal Pendidikan MIPA Vol 26, No 3 (2025): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpmipa.v26i3.pp1479-1495

Abstract

This study aims to develop an electronic book (e-book) based on the Problem-Based Learning (PBL) approach to enhance students' conceptual understanding and digital literacy on the topic of work and energy. Responding to the growing demand for interactive and student-centered learning media in physics education, the e-book is designed to serve as a learning resource that fosters engagement in problem-solving and critical thinking. The research adopts the ADDIE development model, comprising Analysis, Design, Development, Implementation, and Evaluation, and applies a quantitative approach using a one-group pretest-posttest design. Participants in this study were tenth-grade students from State Senior High School 9, Yogyakarta. Data were collected through the use of the developed e-book, conceptual understanding tests, digital literacy questionnaires, and student response surveys. Validators rated the e-book as “highly valid” and suitable for use. The implementation results showed a significant improvement in students' conceptual understanding, with an N-gain score of 0.71, which falls into the high category. Additionally, there was an improvement in digital literacy, with an N-gain score of 0.66, which also falls into the high category. The effectiveness of this e-book was also tested using a T-test and showed significant improvements before and after learning for both variables. Additionally, students responded positively, finding the e-book engaging, easy to access, and beneficial in supporting their learning process. These preliminary findings indicate that the PBL-based e-book has the potential to be an effective learning tool for high school physics education.    Keywords: e-book, problem-based learning, work and energy, conceptual understanding, digital literacy.
Content Analysis of Class X High School Physics Learning Video by Koh Ben on the Big Course YouTube Channel Arifa, Muh Fajrin; Widiatmono, Restu; Jumadi, Jumadi
Jurnal Penelitian Pendidikan IPA Vol 9 No 6 (2023): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i6.2745

Abstract

This paper reports research that aims to determine the feasibility of a learning video made by Koh Ben on the 'BIG Course' YouTube channel. Video learning is one of the most frequently used learning media and only videos that are appropriate can provide maximum benefits in learning physics. This study used a content analysis design with 4 analyzes carried out, namely content analysis, presentation analysis, graphic analysis, and language analysis. The learning videos analyzed were taken directly from the YouTube channel totaling 20 videos containing material for class X physics in the 2013 curriculum. From the results and discussion, it was concluded that the 20 videos for teaching physics for class X were very feasible with a percentage of 89.25% on the content aspect, 86% on the aspect delivery, 91.5% in the graphic aspect, and 99.75% in the language aspect
Problem Solving Skill in Physics Learning: Systematic Literature Review Nasir, Muhammad Hilmi; Widiatmono, Restu; Kuswanto, Heru
Jurnal Penelitian Pendidikan IPA Vol 11 No 4 (2025): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i4.9579

Abstract

A systematic literature review on problem solving skills in physics learning has been done. The purpose of this literature review is to discuss aspects that affect problem solving skills in physics and determine the proper learning method to improve problem solving skills in physics. The method used in writing this article is literature review. Literature was searched by accessing electronic databases online from Scopus. At the beginning of the search in the Scopus database using the keywords problem solving, physical education, students. 35 articles were obtained that were in accordance with the research topic, and limited publications for the last 5 years. Through this literature review, it was found that problem solving ability in physics learning is influenced by the relationship with the students themselves, teachers, and the school environment. The selection of effective learning models and media can improve problem solving skills in physics learning, such as the use of STEM-based Project Based Learning (PjBL) models, inquiry learning models, causal reasoning learning models, and the application of CPSPL (cooperative problem solving physics) models, as well as the use of module, web-based learning and interactive multimedia can improve student's problem solving skills.
Co-Authors Arifa, Muh Fajrin Artanti, Francisca Happy Denny Darmawan Denny Darmawan Dyah Respati Suryo Sumunar Frans J. M. Harren Herman Dwi Surjono Heru Kuswanto Ilham Adi Panuntun Izza Fauzia Juliasih Partini Julien Mandon Jumadi Jumadi Kusminarto - Mitrayana - Moh Ali Joko Wasono Nasir, Muhammad Hilmi Rachmah, Diah Nur Rida Siti Nur’aini Mahmudah Sri Sumardiningsih