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All Journal Biosfer: Jurnal Tadris Biologi International Journal of Science and Applied Science: Conference Series Jurnal Sains dan Edukasi Sains Jurnal Riset dan Inovasi Pembelajaran Jurnal Materi dan Pembelajaran Fisika Jurnal Pengabdian Masyarakat Bhinneka Jurnal Pengabdian Masyarakat Bangsa Bulletin of Chemical Reaction Engineering & Catalysis Journal of Environment and Sustainability Education

Dwi Teguh Rahardjo

Prodi Pendidikan Fisika, Jurusan PMIPA, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Sebelas Maret, Surakarta, 57126, Indonesia

Author-ID : 354512

Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Pengembangan Alat Ukur Suhu Contact Less Thermogun Berbasis IOT Menggunakan Aplikasi BLYNK Sebagai Alat Ukur Suhu Di Era Covid-19 Rosanti, Nyoman Meta; Rahardjo, Dwi Teguh; Harjunowibowo, Dewanto
Jurnal Materi dan Pembelajaran Fisika Vol 12, No 1 (2022): Jurnal Materi dan Pembelajaran Fisika
Publisher : Universitas Sebelas Maret

Tujuan Penelitian ini untuk : (1) Membuat Infrared thermogun contactless berbasis Internet Of Thing dengan kemampuan data logging, (2) Menjelaskan prinsip kerja dari thermogun untuk mengukur suhu tubuh, (3) Melakukan uji kelayakan thermometer berbasis IOT sebagai alat pengukur suhu secara otomatis, Metode penelitian yang digunakan adalah R&D dan model ADDIEdengan tiga tahap prosedur pengembangan yaitu (1) Analysis, (2) Design, (3) Development. Data yang diperoleh berupa data kualitatif yang didukung dengan data kuantitatif yang diperoleh dari angket. Thermogun melewati tahap kalibrasi dan pengujian menggunakan PID sebagai acuan dan Elitech sebagai pembanding. Pada pengembangan alat ini digunakan aplikasi BLYNK sebagai aplikasi yang akan menjadi controller dan pencatatan data. Selanjutnya Thermogun, PID, dan Elitech diuji dengan menggunakan air yang bersuhu 0 oC sampai dengan 100 oC, jarak 15 cm, serta waktu 100 detik dari 10 kali pengambilan data. Hasil dari setiap alat mendapatkan hasil berupa nilai standar deviasi, standard error, ketidakpastian relatif, persentase error, tingkat akurasi, dan presisi. Untuk uji alat Elitech terhadap PID didapatkan R2= 0,9955. Kesimpulan dari penelitian pembuatan thermogun berbasis IOT menggunakan aplikasi BLYNK ini mempunyai tahapan sebagai berikut: (1) tahap persiapan dengan membuat perangkat hardware,software, dan pembuatan program, (2) tahap perancangan alat berdasarkan design yang telah dirangkai, serta pengambilan data untuk dilakukannya uji coba alat serta kalibrasi (3) tahap penyelesaian dilakukan validasi dan penilaian thermogun. Karakteristik dari thermogun ini dapat digunakan secara manual maupun otomatis lewat aplikasi. Berdasarkan hasil validasi ahli dan reviewer thermogun yang dikembangkan dinilai cukup baik.

Refinement Struktur Kristal Superkonduktor BSCCO–2212 dengan Substitusi Pb Rahardjo, Dwi Teguh
Jurnal Materi dan Pembelajaran Fisika Vol 12, No 1 (2022): Jurnal Materi dan Pembelajaran Fisika
Publisher : Universitas Sebelas Maret

Analisis refinement struktur kristal telah dilakukan pada data XRD superkonduktor BSCCO-2212 yang disubstitusi Pb. Superkonduktor fase BSCCO-2212 disintering pada suhu 8200C dan dikalsinasi pada suhu 8000C. Waktu sintering sampel divariasi pada 0, 12, 24, 36, dan 48 jam. Pembentukan bahan superkonduktor BSCCO-2212 dimulai dari komposisi awal stoikhiometri melalui metode reaksi padatan. Analisis refinement data XRD dilakukan melalui analisis Rietveld dengan metode Least Square yang data model awal dicocokkan dengan data dari XRD. Hasil analisis profil XRD oleh software Celref menunjukkan bahwa terdapat kecenderungan peningkatan fraksi volume BSCCO-2212 dan impuritas bersamaan dengan waktu sintering yang lebih lama. Hasil analisis refinement pada faktor reliabilitas melalui software Fullprof menunjukkan ada kecenderungan penurunan faktor reliabilitas profil. Residu profil terendah adalah Rp = 23%, Rwp = 20,3%, dan χ2 = 23,5% tanpa refinement isotropik suhu. Dari analisis refinement struktur kristal juga menunjukkan bahwa struktur kristal BSCCO-2212 adalah orthorombik dengan grup ruang Fmmm.

Remidiasi Menggunakan Model Kooperatif STAD Pada Materi Momentum Dan Impuls Kelas X SMA Al Islam 1 Surakarta Muzaeni, Tri; Fauzi, Ahmad; Rahardjo, Dwi Teguh
Jurnal Materi dan Pembelajaran Fisika Vol 13, No 1 (2023): Jurnal Materi dan Pembelajaran Fisika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jmpf.v13i1.67635

The purpose of this study was to: find out that Remediation of Physics learning using the STAD (Student Teams Achievments Divisions) cooperative learning model can improve the cognitive abilities of students of class X MIA 3 on Momentum and Impulse material.This research is a quasi-experimental study using one class. This study uses a one-group pretest-posttest model. The data analysis technique uses quantitative techniques. Quantitative analysis is used to test the proposed hypothesis. The submission of the hypothesis in this study uses the t-test statistic (1 tail) to show an increase in students' cognitive physics abilities after the action.Based on the results of data analysis and discussion obtained from the research, it can be concluded that: Remediation of Physics Learning Using the STAD Cooperative Learning Model can improve the cognitive of class X MIA 3 SMA Al Islam 1 Surakarta on Momentum and Impulse material. Based on the hypothesis test that t count is greater than t table, namely tcount = 9.495> ttable = 1.68830 which indicates that there is an increase in students' physical cognitive abilities. The amount of increase based on the gain index is 0.58 which is included in the medium category.

Analisis Pemahaman Konsep menggunakan Certainty of Response Index (CRI) pada Materi Gerak Lurus Setyantini, Wahyu Tulus; Rahardjo, Dwi Teguh; Suharno, Suharno
Jurnal Materi dan Pembelajaran Fisika Vol 12, No 2 (2022): Jurnal Materi dan Pembelajaran Fisika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jmpf.v12i2.60666

This study aims to find out: (1) The existence of misconceptions about Straight Motion material in the textbook for Physics class X MIPA-1 SMA Negeri 1 Sambungmacan (2) Profile understanding of the concepts of students in class X MIPA-1 SMA Negeri 1 Sambungmacan. The method used in this study is a qualitative descriptive method. Data and data sources come from textbooks and students of class X MIPA 1 SMA Negeri 1 Sambungmacan. Data was collected by test techniques, questionnaires, and interviews. Techniques to test the validity/validity of data using triangulation techniques of data collection techniques. Meanwhile, the data analysis method uses data simplification, data presentation, and conclusion. The research procedures were preparation, data collection, data analysis/drawing conclusions, and writing reports. The results of this study stated that the student handbook in Class X MIPA-1 SMA Negeri 1 Sambungmacan still contained misconceptions. Misconceptions consist of a lack of completeness of concepts and errors in writing mathematical equations. The criteria for understanding the concept of students in Class X MIPA-1 SMA Negeri 1 Sambungmacan on the Straight Motion materials are divided into Understanding Concepts, Understanding Concepts but Not Sure, Misconceptions, and Don't Know Concepts. Most of the students' misconceptions were in the medium category, as many as 56.67%. Students experience misconceptions about the sub-concepts of Distance and Displacement, Speed, Velocity, and Acceleration, Uniformly Straight Motion and Uniformly Changed Straight Motion, and the Application of Uniformly Changing Straight Motion. The statement of the highest student misconceptions in the sub-concept of the Application of Regular Changing Motion. The causes of misconceptions that exist in students come from student participants, teachers, teaching methods, textbooks, and other causes such as learning facilities.

Analisis Kesalahan Siswa Dalam Menyelesaikan Soal Fisika Ulangan Tengah Semester Kelas XI MIPA Destiara, Ansita Diah; Rahardjo, Dwi Teguh; Budiawanti, Sri
Jurnal Materi dan Pembelajaran Fisika Vol 12, No 2 (2022): Jurnal Materi dan Pembelajaran Fisika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jmpf.v12i2.49862

This study aims: (1) to describe the profile of errors made by students of class XI MIPA 1 SMA Warga Surakarta in the academic year 2019/2020, (2) to analyze the profile of the causes of errors made by students of class XI MIPA 1 SMA Warga Surakarta in the academic year 2019/2020. The method used is a case study and was carried out in class XI MIPA SMA Warga Surakarta. The research subjects were selected as many as 8 students from 24 students of class XI MIPA 1 with a sampling technique aimed. Data collection techniques through observation techniques, taking data from test answer sheets, and interviews. Data validation was done by data triangulation, namely by comparing the data from the UTS results, the results of teacher and student observations, and data from interviews with several students. Data analysis was carried out through the stages of data reduction, data presentation, and conclusion. Based on the data analysis and discussion, it was concluded: (1) the profile of errors made by class XI MIPA 1 SMA Warga Surakarta in solving physics questions for the mid-semester test of the 2019/2020 school year based on Newman's criteria were reading errors (3.84%), comprehension errors (20.18%), transformation error (50.23%), process skill error (58.65%), and encoding error (73.07%). (2) The reasons for errors experienced by students of class XI MIPA 1 SMA Warga Surakarta for the 2019/2020 school year are not being careful when reading questions, rushing to work on questions, forgetting material concepts, forgetting the equations used, and experiencing errors at this stage previously.

Co-Authors Al Fatihah, Inayah Andriyani Andriyani Anif Jamaluddin Arifa, Aulia Budi Purnama Destiara, Ansita Diah Dewanto Harjunowibowo Elvin Yusliana Ekawati Fauzi Ahmad Muda Firmansyah, Maulana Haryani, Fairusy Hibatullah, Hanif Hidayah, Amalia I Gusti Agung Komang Diafari Djuni Hartawan Jamzuri Jamzuri Kunthi Ratna Kawuri, Kunthi Ratna Lis Murtini, Lis Lita Rahmasari Murni Ramli Musadewi, Adiana Muzaeni, Tri Nonoh Siti Aminah Nugroho, Lilik Andre Nugroho, Panji Setyo Nurhayati, Lintang Nuryani Nuryani Prasetya, Nurdiyantoro Putra Prasetyawati, Farah Yuki Rahmawati, Ramadona Riezky Maya Probosari Rini Budiharti Riyatun, Riyatun Rosanti, Nyoman Meta Sarwanto Sarwanto Setyanisa, Lia Setyantini, Wahyu Tulus Setyowati, Nuranisa Dwi Sitorus, Mido Ester Sri Budiawanti Suharno Suharno Sukarmin Syamsuddin, Frendi Ihwan Tri Wiyoko Ulwan, Rozin Fata Utari Utari Utoro Romadhon, Utoro Widha Sunarno Yazida Rizkayanti, Yazida Yofentina Iriani Yulianto Agung Rezeki

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