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Budi Astuti
Jurusan Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Penerapan Project Based Learning (PjBL) Terbimbing untuk Meningkatkan Keaktifan dan Pemahaman Siswa pada Konsep Momentum, Impuls, dan Tumbukan Lisa Puspitasari; Budi Astuti; Masturi Masturi
Physics Education Research Journal Vol 2, No 2 (2020)
Publisher : Faculty of Science and Education, UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/perj.2020.2.2.4959

Abstract

This study aims to analyze the increase in students' activeness and conceptual understanding after the guided Project Based Learning (PjBL) model is applied. The research method used was a pre-experimental one group pretest-postest design. The research instruments included test and non-test instruments. The test instrument in this study was a reasoned multiple choice. The non-test instrument uses student activeness observation sheets. Students' activeness and conceptual understanding were analyzed using the N-Gain test. The significance of increasing students' activeness and understanding of concepts was analyzed using the Wilcoxon mathced pairs test. The results of the data analysis showed that the students' activeness and conceptual understanding of the Momentum, Impulse, and Collision material after being applied to guided PjBL experienced a low increase with N-Gain of 0.20 and 0.22. The results of the significance test of students' activeness and conceptual understanding were obtained values of 0.041 and 0.000 (0.050). Based on the results of the analysis, it can be concluded that the implementation of the guided Project Based Learning model was able to significantly increase the activeness and understanding of students' concepts in the material Momentum, Impulse and Collision at Nurul Islami High School.
Analisis Literasi Sains Peserta Didik pada Mitigasi Bencana di Sekolah yang Dekat dengan Daerah Bencana dan Jauh dari Daerah Bencana Tanah Longsor di Kota Semarang Indah Suryaningrum; Budi Astuti; Ani Rusilowati; Khumaedi Khumaedi
WaPFi (Wahana Pendidikan Fisika) Vol 6, No 1 (2021): WaPFi (Wahana Pendidikan Fisika) Februari 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (470.031 KB) | DOI: 10.17509/wapfi.v6i1.32462

Abstract

Tujuan artikel ini untuk menganalisis literasi sains peserta didik pada mitigasi bencana alam yang terjadi di Kota Semarang berdasarkan lokasi kejadian, yaitu dekat dengan bencana dan jauh dari bencana. Metode penelitian ini adalah mixed methods sequential explanatory dengan desain penelitian one shoot case study. Pengambilan sampel menggunakan teknik purposive sampling di SMAN 7 Semarang sebagai sekolah dekat daerah bencana (SMA A), dan SMAN 11 Semarang sebagai sekolah jauh dari daerah bencana (SMA B). Pengumpulan data dilakukan menggunakan instrument tes berbasis literasi sains, angket, serta wawancara terhadap beberapa peserta didik yang mewakili kriteria aspek kognitif. Berdasarkan analisis data, ditunjukkan tidak adanya perbedaan literasi sains peserta didik yang berada dekat dan jauh dari lokasi bencana alam. Hal tersebut dilihat dari persentase rata-rata tiap aspek literasi sains SMA A dan SMA B yang termasuk kriteria kurang sekali. Dengan demikian dapat disimpulkan bahwa jarak sekolah dengan lokasi bencana tidak memengaruhi literasi sains peserta didik. Kata kunci: literasi sains, mitigasi bencana, tanah longsor  ABSTRACT The purpose of this article is to analyze students' science literacy in mitigating natural disasters that occur in Semarang city based on the location of the incident, which is close to the disaster and far from the disaster. This research method is a mixed methods sequential explanatory with a one shoot case study research design. Sampling using purposive sampling technique at SMAN 7 Semarang as a school near the disaster area (SMA A), and SMAN 11 Semarang as a school far from the disaster area (SMA B). The data was collected using a science literacy-based test instrument, a questionnaire, and interviews with several students who represent the criteria for cognitive aspects. Based on data analysis, it was shown that there were no differences in science literacy of students who were near and far from the location of natural disasters. This can be seen from the average percentage of each aspect of science literacy in SMA A and SMA B which is categorized as very poor. Thus, it can be concluded that the distance between the school and the disaster location does not affect students' science literacy. Keywords: disaster mitigation, landslide, science literacy
Effectiveness of adding ZnO thin films to metamaterial structures as sensors Saktioto Saktioto; Yan Soerbakti; Ari Sulistyo Rini; Budi Astuti; Erman Taer; Rahmondia Nanda Setiadi; Syamsudhuha Syamsudhuha; Sofia Anita; Yolanda Rati
Indonesian Physics Communication Vol 21, No 1 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.1.13-24

Abstract

Metamaterials are artificial materials with the characteristics of a negative refractive index and high resonance sensitivity. Advanced engineering in metamaterials can realize great potential in combination with zinc oxide (ZnO) semiconductor materials, which can increase the efficiency of sensor technology compared to other conventional material models. This research aims to investigate the optical properties and develop an invention for a hybrid sensor media based on a split ring resonator (SRR) metamaterial structure integrated with a thin layer of ZnO. The research methodology was carried out by simulation by designing and characterizing SRR metamaterials which were designed with variations in SRR patterns, geometry, substrate materials, unit cell configurations, and variations in the thickness of the ZnO thin layer. Geometry characterization of SRR metamaterials was carried out using the Nicolson-Ross-Weir electromagnetic (EM) field function approach, specifically the optical parameters permittivity, permeability, and refractive index. They are optimizing the performance of hybrid sensor components based on metamaterials and ZnO thin films using the GHz scale EM field function approach, especially in the reflection, transmission, and absorption spectrum. Analysis of metamaterial characteristics identifies the optical properties of permittivity, permeability, and negative refractive index which are increased and optimized from the thin layer integration model 200 nm thick ZnO in the SRR metamaterial structure with a 3×3 square pattern configuration at a resonance frequency of 1.889 GHz. The performance of the hybrid sensor media provides a resonant frequency of three equal bandwidths in the frequency range 2.89 – 3.52, 5.28 – 6.54, and 7.57 – 8.46 GHz. In addition, the highest absorption spectrum of 73% is at a frequency of ~8 GHz.
Penguatan Implementasi Computational Thinking dalam Pembelajaran Sains Bagi Guru-Guru Sekolah Indonesia Kuala Lumpur Sugiyanto Sugiyanto; Sugianto Sugianto; Putut Marwoto; Budi Astuti
BERDAYA Indonesian Journal of Community Empowerment Vol. 3 No. 2 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The essential 21st-century skills, including collaboration, communication, creativity, and critical thinking, are valuable when combined with computational thinking (CT) skills. Teachers at Sekolah Indonesia Kuala Lumpur (SIKL) need to be capable of implementing CT in their teaching. Since CT is relatively new to the learning environment at SIKL, the implementation of CT in science education needs to be strengthened, particularly for science teachers at SIKL. The issue to be addressed is empowering teachers to implement CT in science teaching at SIKL. The partner’s problem-solving method is based on a facilitation-based Action Learning model. This facilitation-based action learning is divided into three stages: preparation, implementation, and evaluation. The activities include programmed workshops and discussions to understand CT, its importance as a fundamental skill across subjects in today’s and future digital era, and the need for SIKL teachers to acquire foundational CT skills. In addition to workshops and discussions, support was provided in the form of workshops for practicing CT integration and evaluating it within science education. This activity involved 30 SIKL teachers from various levels and subject areas. Before the training, only 45% of participants understood CT concepts, and only a few had applied CT, but afterward, 80% of teachers were able to integrate CT into their teaching. Intensive support in planning, implementing, and evaluating CT-based learning had a significant positive impact. Despite challenges due to the participants' diverse educational backgrounds, the facilitation-based Action Learning method proved effective in addressing these differences and enhancing active participation. This initiative is expected to serve as a starting point for broader CT implementation within SIKL.
Improving Scientific Article Writing Skills for Science Teachers in Banjarnegara Regency through Project-Based Learning Budi Astuti; Langlang Handayani; Ani Rusilowati; Sutikno Sutikno; Budi Naini Mindiyarto; Agus Yulianto; Ellianawati Ellianawati; Sugiyanto Sugiyanto; Nur’ainiyyah Hasni; Shelly Salista Rahmayanti; Candra Fanleon
BERDAYA Indonesian Journal of Community Empowerment Vol. 3 No. 2 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

There are three main elements of activities assessed in assigning credit points to teachers. First is education, second is learning and third is continuous professional development. Education and learning are activities that are usually carried out by a teacher. However, not many teachers are still doing sustainable professional development. One of them is in scientific publications. For this reason, a service was carried out regarding training in writing scientific papers to increase the acquisition of credit scores for Banjarnegara Regency MGMP Science teachers. The training methods applied include planning, implementing training and mentoring and monitoring. Based on the service carried out, it was found that the length of time teaching did not show a positive relationship with writing ability and quantity of publications. Through this service, teachers already have the motivation to start writing even though there have been no published results from this service activity.
Optimalisasi Batu Belah Sebagai Model Tanggul Dalam Upaya Mitigasi Banjir ROB Di Pesisir Pantai Rohamayani Siti; Agus Yulianto; Budi Astuti
Jurnal Teori dan Aplikasi Fisika Vol. 12 No. 02 (2024): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v12i02.400

Abstract

Split stone is a type of irregular stone formed from sedimentary rock deposits and sandstone due to weathering and the influence of abrasion in rivers, so split stones are formed. The utilization of split stone as an embankment can be optimized by varying the angle of inclination of the embankment itself. Coastal dikes were built to mitigate tidal floods that occur in coastal areas and cause physical, material, economic and natural losses. Rob flood is a natural disaster characterized by the release of sea water to land. Rob flooding is caused by land subsidence, tidal waves and the absence of wave barriers. From the results of this research, it was found that the dike with the smallest angle is the most optimal embankment if used on the coast, because the more surface area of the embankment that breaks the waves, the less likely the sea waves overflow into land.   Keywords: embankment, split stone, rob flood, coastal.
Karakterisasi Absorbansi Material Expanded Polystyrene (Eps) Menggunakan Spektrofotometer Uv-Vis Nishfa Mufatihah; Ian Yulianti; Teguh Darsono; Budi Astuti
Jurnal Teori dan Aplikasi Fisika Vol. 14 No. 01 (2026): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v14i01.546

Abstract

Expanded Polystyrene (EPS) merupakan polimer termoplastik yang banyak digunakan karena sifatnya yang ringan, tahan kimia, dan mampu menyerap serta mentransmisikan radiasi elektromagnetik, termasuk cahaya tampak dan ultraviolet. Penelitian ini bertujuan untuk mengkaji pengaruh suhu pemanasan terhadap sifat optik EPS, khususnya nilai absorbansi dan indeks bias, dalam konteks aplikasinya sebagai material inti pandu gelombang optik. Tiga sampel EPS disiapkan: tanpa pemanasan, serta dipanaskan masing-masing pada suhu 150 °C dan 220 °C. Proses fabrikasi melibatkan pelarutan EPS dalam toluena, dilanjutkan dengan aplikasi larutan ke kaca objek, dan karakterisasi dilakukan menggunakan spektrofotometer UV-Vis pada rentang panjang gelombang 200-1200 nm. Hasil pengujian menunjukkan bahwa pemanasan EPS pada 150 °C menurunkan absorbansi UV dan meningkatkan kekakuan material, sementara pemanasan pada 220 °C menyebabkan peningkatan kembali absorbansi akibat pembentukan gugus kromofor, namun menurunkan fleksibilitas material. Sampel tanpa pemanasan menunjukkan absorbansi tertinggi dan indeks bias terbesar (n ≈ 1.59), serta fleksibilitas yang optimal. Berdasarkan hasil ini, EPS tanpa pemanasan dinilai paling layak untuk diaplikasikan sebagai material inti dalam sistem pandu gelombang optik berbasis polimer.     Kata kunci: Expanded Polystyrene (EPS), Indeks Bias, Spektroskopi, UV-Vis
Pengembangan LKPD Digital Berbasis STEM Untuk Meningkatkan Literasi Numerasi Dan Sains Peserta Didik Fikri Ahmad Kamal; Bambang Subali; Budi Astuti; Ani Rusilowati; Arif Widiyatmoko
Jurnal Penelitian Pendidikan IPA Vol 10 No 5 (2024): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i5.6689

Abstract

As a result of interviews with class VIII science teachers at SMP Negeri 15 Semarang, information was obtained that most of the teaching materials used in the Archimedes law material were still in the form of printed teaching materials (student worksheet, modules and textbooks), PPTs and learning videos. The available teaching materials are not yet fully electronic, thus preventing students from accessing learning without time and space limitations. This causes students' numeracy and science literacy skills to be low. The aim of this research is to determine the characteristics of STEM-based digital student worksheet, test the feasibility of STEM-based student worksheet, analyze the increase in numeracy and science literacy after using STEM-based digital student worksheet. This research uses research and development methods. This method can be used to develop teaching materials, namely digital student worksheet. The design of the digital student worksheet development research is based on the Thiagarajan 4D model which includes the definition stage, design stage, development stage and dissemination stage. The research results show that this digital student worksheet is designed to be interactive, containing elements such as links, moving images, audio and video which can increase students' numeracy and science literacy; the results of the digital student worksheet feasibility assessment obtained feasible criteria with a result score of 0.85 (media) and 0.84 (material). The results of this research show that there is an increase in the N-Gain value.
Co-Authors Agus Yulianto Allif Silfiyana Rohman Ani Rusilowati Anita, Sofia Arif Widiyatmoko, Arif Azizah Zhafirah Bambang Subali Bilqis Asy Syarifah Budi Naini Mindyarto, Budi Naini Candra Fanleon Didik Aryanto Diyah Ayu Budi Lestari Ellianawati, Ellianawati Erman Taer Erni Dwi Susanti Fianti Fianti, Fianti Fikri Ahmad Kamal Fitrianingrum, Aufa Maulida Ian Yulianti Ika Vidiasari Aristawati Ika Yunita Nurkholifah Indah Suryaningrum Khumaedi Khumaedi Langlang Handayani Lisa Puspitasari Masturi Masturi Muhamad Bagus Setiawan Ngurah Made Dharma Putra Nishfa Mufatihah Nur Azizah Nur Hamid Nur’ainiyyah Hasni Padilah Popilaya Putut Marwoto Ragil Meita Alfathy Rahmondia Nanda Setiadi Rini, Ari Sulistyo Rizka Silviana Hartanti Rohamayani Siti S Sulhadi Saktioto Saktioto Sarwi Sarwi Shelly Salista Rahmayanti Sugianto - Sugiyanto - Suharto Linuwih Sutikno Madnasri Syamsudhuha Syamsudhuha Teguh Darsono Wiyanto Wiyanto Wiyanto Wiyanto Yan Soerbakti Yolanda Rati