Prosiding Seminar Nasional Fisika

Penerapan model problem based learning terhadap peningkatan kemampuan kognitif siswa SMA pada materi suhu dan kalor

2023-12-27T19:20:36+07:00

This classroom action research aims to determine the application of the Problem-Based Learning (PBL) learning model on Temperature and Heat material to improve the cognitive abilities of high school students. The research was carried out in two cycles involving 29 class XI high school students in West Bandung Regency. Data collection techniques are carried out through observation, questionnaires and cognitive tests. The research results show that the implementation of the PBL model can improve students' cognitive abilities. This is shown by the average student score increasing starting from pre-cycle, cycle 1 and cycle 2. Likewise with the analysis of students' cognitive levels starting from the level of remembering (C1), understanding (C2), applying (C3) to the level of analyzing ( C4), experienced good improvement from cycle 1 to cycle 2. Analysis results from observations of the implementation of the PBL model showed the very good category. Likewise, the responses to the student interest in learning questionnaire showed a good category.

A bibliometric analysis of problem-based learning and physics education research (2013–2023)

2023-12-27T19:24:17+07:00

The development of learning models of education is increasing. Teachers can use various methods and learning models to convey learning material to achieve learning goals at school, one of which is the Problem-Based Learning model. This research aims to discover the research trends of Problem-Based Learning and physics education in the last ten years, which have continued to increase. This research is quantitative research conducted by analyzing the bibliometric "Problem-Based Learning and physics education" model taken from annual publications, countries, institutions, authors, journals, references, and keywords in the field which are processed visually using R software The results of this study were 121 Scopus database metadata documents used and analyzed with Biblioshiny. In general, China has the most publications, Fi Y is a figure who often researches PBL and physics education, and PBL is a learning model that focuses on problem-solving, critical thinking, and student independence. This research provides readers with an understanding of PBL and physics education and serves as a reference for further research

Visualizing trend of 21st-century skills over the last 20 years: a bibliometric analysis

2023-12-27T19:21:40+07:00

Today, the challenges of the 21st century research landscape have given new status to the trends of the last twenty years. Thus, efforts need to be made to support and focus on this trend. This research was conducted by conducting bibliometric analysis on several types of documents, document sources, top contributing countries, top authors, top affiliations, top source titles, top relevant keywords or trends, research citations that include findings along with research recommendations, and visualizations on mapping the top research cited over the past twenty years on 21st century skills research. This research used descriptive quantitative methods with Scopus database metadata processed with Biblioshiny and mapping applications using VOSviewer with 183 documents. Trends in 21st century skills research in the last twenty years generated from bibliometrics showed several trends: 1) student-focused 21st century skills; 2) the top subject studied was engineering; 3) teaching, education, and curriculum on 21st century skills; 4) another subject studied was computing; 5) problem-solving-based learning; 6) STEM learning; and 7) computer-based learning.

Pengembangan e-lkpd berbasis problem based learning berpotensi melatihkan keterampilan kolaborasi siswa sma pada materi gerak harmonik sederhana

2023-12-27T19:21:50+07:00

Pembelajaran di sekolah cenderung berpusat pada guru dan pasif serta media pembelajaran yang digunakan hanya buku/lks saja. Maka dari itu diperlukan media pembelajaran interaktif yang dapat digunakan secara mudah. Penelitian ini bertujuan menghasilkan media pembelajaran berupa e-LKPD berbasis problem based learning berpotensi melatihkan keterampilan kolaborasi pada materi gerak harmonik sederhana. Metode penelitian menggunakan pendekatan mixed method dengan desain penelitian the expolaratory sequential design. Instrumen pengumpulan data yang digunakan adalah lembar validasi,lembar observasi keterampilan kolaborasi dan angket respon peserta didik. Teknik analisis data hasil penelitian dilakukan secara kualitatif dan kuantitatif. Hasil validasi materi dan media diperoleh presentase 82,2% dan 76 % yang termasuk kategori sangat valid dan valid. Keterampilan kolaborasi pada saat uji coba e-LKPD mendapatkan presentase 81,5% yang termasuk kategori sangat kolaboratif. Kepraktisan e-LKPD berapa pada kategori praktis dengan presentase 86,6% serta e-LKPD mendapat respon positif dari peserta didik dengan presentase 78,9%. Berdasarkan hasil penelitian dapat disimpulkan e-LKPD berbasis problem based learning valid, praktis, efektif dan berpotensi untuk meningkatkan keterampilan kolaborasi peserta didik.

Identifikasi miskonsepsi peserta didik yang menjalani pembelajaran jarak jauh menggunakan five-tier diagnostic test pada materi rangkaian listrik sederhana

2023-12-27T19:21:59+07:00

Penelitian ini bertujuan untuk mengidentifikasi profil miskonsepsi dan sumber miskonsepsi peserta didik yang pernah menjalani Pembelajaran Jarak Jauh (PJJ) pada materi Rangkaian Listrik Sederhana menggunakan Five-Tier Simple Electric Circuit Diagnostic Test (5T-SECDT). Metode pendekatan kuantitatif dengan tipe penelitian deskriptif-eksploratif yang digunakan dalam penelitian ini. Penelitian dilakukan di salah satu sekolah menengah atas negeri di Kota Bandung. Instrumen 5T-SECDT berisikan 12 butir soal diberikan kepada responden sebanyak 84 peserta didik. Hasil dari penelitian menunjukkan bahwa sebanyak 16.77% peserta didik dinyatakan mengalami miskonsepsi dengan jenis miskonsepsi yang tergolong signifikan (>10%) yaitu Clashing Current Model (29,76%) dan Local Reasoning (10,12%). Sedangkan, hasil analisis sumber pemahaman menunjukkan bahwa sumber pemahaman peserta didik diurutkan dari yang paling berpengaruh, yaitu penjelasan guru, pengalaman atau pemikiran pribadi, penjelasan teman, membaca buku, dan internet.

Pembelajaran fisika model levels of inquiry bermuatan nilai ketuhanan untuk meningkatkan attitudes towards physics dan sikap spiritual siswa SMA

2023-12-27T19:22:25+07:00

The purpose of this study was to get an overview of increasing attitudes towards physics and growing spiritual attitudes of high school students as the effect of applying the levels of inquiry model with divine values in learning physics on static fluid subject matter. The research method used is a mixed method (mix-methods) which includes quantitative and qualitative research using embedded experiment design. The research subjects were 64 students of class XI at a private high school in Subang district, West Java. The data collection instruments used included an attitudes towards physics scale and a spiritual attitude questionnaire. The results showed that the application of the levels of inquiry model with divine values could change the attitudes towards physics of the majority of high school students in a more positive direction and could foster the spiritual attitude of most high school students. These results indicate that there is quite good potential for the levels of inquiry model with divine values when used to improve high school students' attitudes towards physics as well as cultivate spiritual attitudes.

Unveiling the evolution: A bibliometric analysis of physics learning website trends in the past 5 years

2023-12-27T19:22:34+07:00

This study aimed to comprehensively examine the field of physics learning website research by conducting bibliometric analysis on 101 publications from the 2018-2023 Scopus database. The purpose of this research was to comprehensively assess the field of physics learning website research. This article performed bibliometric analysis on literature related to physics learning websites, focusing on four main research questions: (1) How did research on physics learning websites develop? (2) Who are the countries, agencies and authors that have contributed most to research on physics learning websites? (3) What were the research topics on physics learning websites that researchers had explored in the last 5 years? (4) How was the distribution and trend of keywords in research on physics learning websites? This study combined quantitative analysis with descriptive methods. The focus was on physics learning websites found within Scopus, determined based on article titles, abstracts, and keywords. During this study, the R-tool bibliometrix package (biblioshiny) was used for data analysis and mapping. The results show that the number of publications experiences fluctuations (irregular ups and downs). Findings indicate that Indonesia, the United States, and Canada are the most prolific affiliated countries for researchers on physics learning websites, with the highest language being English. Stanford University, Universitas Negeri Jakarta, and the University of West Bohemia are the most influential universities in the field of physics learning websites. V. Serevina, Myu Khlopov, and FC. Wibowo are the most relevant researchers in the field of physics learning websites. The most common types of research documents are conference papers and articles, with the highest fields being physics and astronomy, computer science, and engineering. The most represented articles on physics learning websites are from the Journal of Physics: Conference Series, Bled Workshops in Physics, and CEUR Workshop Proceedings. Additionally, the top Plus Keywords are websites, with a frequency of 41 or 3.54% of the total, and the top author keywords are astroparticle physics, e-learning, and machine learning, with a frequency of 4 or 1.27% of the total.

Exploring trends in augmented reality research for science education: A bibliometric mapping analysis

2023-12-27T19:22:43+07:00

Augmented reality (AR) has emerged as a captivating research area in science education. This study seeks to analyze bibliometric trends in the past nineteen years by mapping content and articles related to AR's use in science education. The research employs descriptive quantitative bibliometric mapping, accessing 354 sources from 594 documents, with 35 documents selected to examine literature on AR in science education. Through bibliometrics, we evaluate the most prominent sources, authors, cited documents globally, frequently used words, and literature development trends on this topic. Recent literature on using AR in science education has garnered significant attention. Research trends demonstrate a steady rise in publications discussing AR's use to 1) enhance scientific learning, 2) increase student engagement and present concepts more concretely, 3) motivate learning and critical thinking, 4) facilitate collaborative learning, and 5) offer simulation opportunities to students.

Implementation of inquiry based learning (IBL) assisted with tracker application in free fall movement practicum to improve students’ problem solving

2023-12-27T19:22:51+07:00

Kemampuan pemecahan masalah adalah salah satu keterampilan paling penting abad ke-21 yang dituntut oleh lingkungan untuk meningkatkan pengetahuan dan pemahaman dalam menghadapi tantangan kehidupan di masa depan sejak dini. Penggunaan teknologi sepeti tracker dapat melatih pemahaman dalam menganalisis video dan pengolahan data kinematik, mengidentifikasi hubungan antara besaran fisis dan mewujudkan suatu model pembelajaran yang memiliki kemiripan yang mendetail antara eksperimen dan teori. Berdasarkan masalah tersebut dilakukan penelitian untuk meningkatkan keterampilan memecahkan masalah pada siswa dengan menerapkan pembelajaran inkuiri berbantuan tracker. Penelitian ini merupakan penelitian kuantitatif dengan menggunakan metode kuasi-eksperimen dan nonequivalent control group design sebagai desain penelitian. Sampel penelitian berupa dua rombongan belajar kelas XI yang dipilih dengan menggunakan teknik purposive sampling. Hasil dari penelitian ini berupa data analisa peningkatan keterampilan memecahkan masalah pada materi gerak jatuh bebas.

Pengaruh pendekatan inquary based learning science education (IBSE) terhadap kemampuan berpikir kreatif dan kemampuan komunikasi peserta didik pada materi kinematika

2023-12-28T13:22:49+07:00

The demand for quality human resources, capable of competition and character, is the challenge of 21st century education as stipulated in the Partnership 21st Century (P21) framework, students are expected to be able to survive by using the skills they have to develop learning skills, innovation, technology and median information. The application of the Inquiry Based Science Education (IBSE) approach can have a positive influence on students' creative thinking abilities and communication abilities in the context of kinematics material. In the implementation of IBSE, students are actively engaged in the learning process through experiments, observations, and discussions, which encourages them to develop better creative thinking and communication skills. The results of the research indicate that students who learn with the IBSE approach have higher scores in creative thinking and communication abilities compared to those who learn with conventional approaches. Based on these findings, it can be concluded that the application of the IBSE approach as a teaching method in kinematics material can enhance students' creative thinking and communication abilities. It is important to note that the specific impact of the IBSE approach may vary depending on various factors such as the proficiency level of students, the teaching environment, and the instructional methods used. Nonetheless, overall, the IBSE approach has shown promise in promoting creative thinking and communication abilities among students in the context of kinematics material. Initial data is taken from the final exam results of XI SMA Negeri 50 Jakarta students in the 2022/2023 school year. The study uses pre- and post-test results as a data collection tool, using descriptive questions related to creative thinking indicators. By analyzing the difference between scores before and after the test and calculating the normalized pass, the study aimed to identify improvements in critical thinking skills in both grades.

Penerapan flipped classroom dengan google classroom dan youtube untuk meningkatkan hasil belajar pada materi elastisitas

2023-12-28T13:33:15+07:00

Since the Covid COVID-19 pandemic until now, student learning techniques have changed significantly. Likewise, the development of technology is increasing. Students and Teachers began to routinely access various learning applications with the devices they have, including Zoom, Google (Google Classroom and YouTube), and various other Learning Management System (LMS) applications. SMAIT Gema Nurani actively utilizes various tools provided by Google as a learning tool. However, this is not in line with the value of student learning outcomes. Based on the evaluation results of the previous material, it was concluded that most students only relied on the learning process in the classroom without learning the material beforehand. Therefore, the researcher tried to apply the flipped classroom learning model with Google Classroom and YouTube to improve the learning outcomes of students on elasticity. The method used in this research is action research is action research (Classroom Action Research). This research was conducted in 2 cycles. This average student learning result in cycle 1 was 64 (on a scale of 100) and the average student learning result in cycle 2 was 82 (on a scale of 100). Based on this, it can be concluded that by applying the flipped classroom learning model by utilizing Google Classroom and YouTube, there was an increase in the learning outcomes of students on elasticity material.

Implementation of cooperative learning model with Two Stay Two Stray (TSTS) type to improve student’s communication skills

2023-12-28T13:37:50+07:00

A 3-month preliminary study in the PPLSP program at a high school in Bandung City revealed that the teaching method was teacher-centered, resulting in boring passive learning, and hindered students' communication skills. To overcome this, the research aims to improve students' communication skills by applying the TSTS type cooperative learning model. A qualitative approach is used with observation sheets to measure communication skills and the implementation of learning models. Based on the results of the analysis, this study applies the TSTS model developed by Spencer Kagan (1992). The findings from this study indicate a significant increase in student activity. This improvement involves various aspects of students' communication skills, including speaking and opinion skills, receptive communication (listening, reading, or viewing), asking questions and responding, and presentation skills.

Implementasi VTR/GO 4C’s untuk meningkatkan kemampuan HOTS siswa kelas VIII pada materi gerak

2023-12-28T13:55:05+07:00

The implementation of HOTS (Higher Order Thinking Skills) learning in learning often experiences problems in stimulating students, because HOTS tends to be related to difficult questions. Apart from HOTS being applied in questions, HOTS stimulus in learning must be applied. The results of a preliminary study conducted on class VIII students by giving multiple choice questions related to motion material showed an average score of 50. This research aims to improve the HOTS abilities of class VIII students in learning physics on Motion material. By applying VTR/GO 4C's in learning, students will fill in each column of VTR/GO 4C's, namely (Connectionion, Challenge, Concept Change). In the "Connectionion" column, students are given a stimulus from a video about movement phenomena, then students Connection it with everyday life based on experience or information they have obtained (C3). After writing in the "Connectionion" column, students are expected to be able to create several questions from the video stimulus or from the learning that has been carried out and can be written in the "Challenge" column (C6). In the "Concept" column, students write and analyze important keywords from the results of the explanation given by the teacher (C4). The teacher gives practice questions and students reflect on the learning they have done or write down insights from the learning they have done in the "Change" column (C5). The results of the analysis using VTR/GO 4C's can be used as an alternative in improving students' HOTS abilities in learning the physics of Motion material.

A bibliometric analysis of microlearning video for physics online learning research (2013–2023)

2023-12-28T14:11:43+07:00

Challenges in the future that can be competitive, namely by using interactive learning media based on the internet and technology, one of which is microlearning video learning. This research was conducted by analyzing the "Video Microlearning" model. Bibliometrics retrieved from several document types, document sources, top contributing countries, top authors, top affiliations, top source titles, top relevant or trending keywords, research citations that include research findings along with recommendations, and a visualization of the top research mappings that quoted over the past ten years. The results of this study used a quantitative descriptive method of 166 Scopus database metadata documents that were used, processed, and analyzed with Biblioshiny and a mapping application using VOSviewer. In general, the United States (USA) is the country with the most publications, and Cui T is the figure who contributes the most to research. Trends in microlearning video research over the years (2013-2023) resulting from bibliometrics show several trends, namely education, e-learning-based learning, video recording-based learning, human experiment-based learning, teaching-based learning, social media-based learning, motivation-based learning, problem-solving based l_earning, and various other trends

Mengatasi pencemaran air oleh limbah cair sagu menggunakan media filtrasi limbah padat sagu dan eceng gondok

2023-12-28T14:34:40+07:00

Kualitas air limbah hasil pengolahan sagu sering kali menimbulkan tantangan bagi lingkungan karena belum adanya penanganan yang berkelanjutan sehingga memberikan dampak yang merugikan bagi masyarakat sekitarnya. Berdasarkan observasi awal ditemukan pH air yang tercemar di bawah skala 6. Dalam rangka mengatasi permasalahan lingkungan tersebut yang berkaitan dengan SDGs nomor 6 yaitu clean water and sanitation, tujuan penelitian ini berfokus pada pencemaran air oleh limbah sagu pada salah satu pabrik yang berada di Cipeundeuy, Bandung Barat, Jawa Barat menggunakan kombinasi fitoremediasi menggunakan eceng gondok (Eichhornia crassipes) dan media filtrasi buatan dengan menggunakan limbah padat sagu. Penelitian ini menggunakan metode eksperimen untuk menganalisis dampak metode yang digunakan dalam meningkatkan kualitas air limbah sagu dengan memanfaatkan fitoremediasi pada eceng gondok dan media filtrasi yang telah dirancang dilakukan empat kali uji coba untuk memperoleh karakteristik uji filtrasi yang optimal. Hasil penelitian menunjukkan bahwa pendekatan kombinasi fitoremediasi dan filtrasi buatan secara signifikan meningkatkan kualitas air limbah sagu. Tingkat pH berubah menjadi netral ditandai dengan kenaikan nilai hingga mencapai 7 pada skala pH serta kejernihan air meningkat karena partikel terlarut tersaring dengan baik. Metode ini tidak hanya mengatasi masalah kualitas air, tetapi juga memberikan solusi berkelanjutan dalam pengelolaan limbah sagu baik cair maupun padat yang berkontribusi pada pelestarian lingkungan dan optimalisasi sumber daya.

Bibliometric analysis of STEAM in physics education: exploring scopus database on the last decades (2013-2023)

2023-12-27T19:44:39+07:00

Physics education currently combines science, technology, engineering, art, and mathematics (the STEAM concept) in learning, creating a more interesting and creative way of learning. This study used 57 articles from the Scopus database with publication years ranging from 2013 to 2023. This study aimed to provide an understanding of STEAM research in physics education. This article conducts a bibliometric analysis of the STEAM literature in physics education, focusing on three main research questions: (1) How is the development of research on STEAM in physics education? (2) Which authors, affiliations, and countries have contributed the most to research on STEAM in physics education? (3) Who is most often used as the subject of STEAM research in physics education? This study combines quantitative analysis with descriptive methods. In the process of this research, two software tools were employed: Bibliometrix R-tool and BiblioShiny for data analysis, dimensionality reduction, and information mapping, and Flourish for data visualization. The results of this study for the first question found that the annual growth rate was 17.46%. This indicates that the number of journal articles discussing incorporating STEAM in physics education continues to increase, reflecting the increasing discussion and sharing of information on this topic. This research also found Jesionkowska J to be the author who is in the top ranking for the most frequently mentioned documents globally, the University of Ceu Cardenal Herrera to be the institution that has contributed the most to STEAM Physics Education research, and Spain is the top ranking for the country that has contributed the most to research. STEAM in physics education. In addition, it was also found that the top STEAM research subjects in the field of physics education were SMA/SMK students and teaching staff.

Exploring research trends of physics conceptual understanding in physics learning in 5 past years: bibliometric analysis

2023-12-28T14:58:20+07:00

Research related to the application of concept understanding or conceptual understanding in physics education is growing and has become a hot topic for decades. Research related to literature studies related to non-specific concept understanding in physics education and literature reviews related to bibliometric analysis have not been widely conducted. Research using bibliometric analysis and understanding of physics concepts using the Scopus database has not been widely studied. The objectives of this study include knowing how the research network and research visualization of understanding concepts in physics learning and its contribution to physics learning, then how the contribution of the country of scientists in the topic of understanding concepts in physics learning. This research uses a descriptive quantitative analysis method with the help of R software, this research uses 66 sources and 268 articles in past 5 years. The results based on the co-occurrence network obtained from Biblioshiny, obtained several dominant keywords in the topic of understanding the concept of students and education computing. Then, when viewed from these results indicate that the words students and education computing are topics that have the strongest connection with other words. In other words, this topic describes the concept or subject that is most often talked about or has a strong relationship with other elements in the same context. Then, based on the country's scientific production mapping, several countries have the most scientific publications. Among them are Indonesia with 628 articles, USA with 258 articles, and Germany with 184 articles. The production of these scientific publications indicates that the country contributes to research trends on the topic of concept understanding.

Evolusi Foton: Dari Cara Planck 1900 sampai Transisi Terstimulasi Einstein 1916 – Suatu bahan pendukung kuliah Fisika Dasar

2023-12-28T16:09:39+07:00

Bahan kuliah tentang evolusi konsep foton ini, dipandang bermanfaat untuk melatih kekritisan berpikir siswa/mahasiswa. Titik tolak yang berguna adalah Wikipedia, ensiklopedia digital yang mudah diakses, dan cukup sederhana uraiannya. Judul “Planck’s law” menyediakan titik tolak berpikir yang sederhana. Hipotesis Planck Desember tahun 1900, tentang asumsi bahwa energi radiasi perlu berupa kelipatan gugus energi h f, membukakan langkah teknis perhitungan, yang menghasilkan rumusan rapat energi radiasi benda hitam. Rumusan Planck ini mencakup perilaku rumusan Rayleigh-Jeans untuk frekuensi rendah, sampai ke rumusan Wien untuk frekuensi tinggi. Rumusan ini konsisten dengan hasil pengukuran intensitas radiasi itu, yang masa itu mulai makin teliti kemampuan mengukurnya, meskipun masih di rentang visual dan inframerah saja. Tahun 1905, Einstein menampilkan asumsi gugusan energi h f itu sebagai realitas bagi radiasi, untuk menjelaskan hasil pengukuran tentang gejala fotolistrik. Tahun 1916, Einstein lalu menyajikan konsekuensi perilaku gugusan energi itu, akibat interaksi radiasi dengan bahan bermateri, yang memiliki tingkat energi tertentu selaras dengan model atom yang digagas Bohr tahun 1913. Satu konsekuensi adalah adanya transisi terstimulasi, yang baru berhasil dimanfaatkan tahun 1950an, untuk proses maser dan laser, yang sejak itu berkembang pesat, mengembangkan cabang ilmu optika modern, dan peran laser masa kini. Menelusuri proses berpikir dari rumusan empiris ke konsep teoretis, dengan tetap menjaga kesesuaian dengan kenyataan, dapat menggunakan materi makalah ini sebagai bacaan pemicu.

Analisis waktu paruh isotop Ba133 dan Cs137 terhadap Dead-Time melalui percobaan gamma berbantuan Geiger Muller Counter RADLAB

2023-12-28T16:23:43+07:00

Penentuan waktu paruh isotop dan estimasi Dead-Time merupakan langkah penting dalam analisis nuklir. Penelitian ini dilakukan dengan menganalisis waktu paruh isotop Ba¹³³ dan Cs¹³⁷ serta estimasi Dead-Time melalui percobaan gamma berbantuan Geiger Muller Counter RADLab. Percobaan dilakukan dengan menggunakan sumber gamma isotop Ba¹³³ dan Cs¹³⁷ dengan intensitas radiasi yang diketahui. Studi ini bertujuan untuk menganalisis waktu paruh isotop Ba¹³³ dan Cs¹³⁷ serta memperkirakan pengaruh Dead-Time melalui penggunaan percobaan gamma yang menggunakan Geiger Muller Counter RADLab. Metode Penelitian yang digunakan pada Penelitian ini adalah eksperimen gamma menggunakan Geiger Muller Counter RADLab Percobaan dilakukan dengan prosedur sumber gamma ditempatkan dalam posisi tetap di dekat Geiger Muller Counter RADLab. Dilakukan pengukuran oleh counter dalam interval 10 – 6000 sekon. Data yang diperoleh digunakan untuk menghitung waktu paruh isotop dan estimasi Dead-Time. Hasil penelitian menunjukkan bahwa waktu paruh isotop Ba¹³³ diukur sebesar 11908,99249 dengan ketidakpastian 1495,55854, sedangkan waktu paruh isotop Cs¹³⁷ diukur sebesar 12996,85362 dengan ketidakpastian 2295,16209. Evaluasi pengaruh Dead-Time untuk Ba¹³³ menunjukkan 8254,68547 dengan ketidakpastian 1036,64219 untuk Cs¹³⁷ menunjukan 9008,73244 dengan ketidakpastian 1590,88513. Hasil penelitian menunjukkan bahwa terdapat keterkaitan linier antara jumlah deteksi per detik (CPS) dan waktu pengukuran. Namun, keberadaan dead-time mempengaruhi akurasi pengukuran waktu paruh, sehingga dilakukan koreksi dead-time untuk memperbaiki hasil tersebut. Isotop Ba¹³³ menunjukkan hubungan linier dengan CPS, sementara isotop Cs¹³⁷ memiliki pola yang berbeda, menunjukkan pentingnya memperhatikan karakteristik isotop dalam analisis radioaktivitas. Penelitian ini memberikan pemahaman yang lebih mendalam mengenai waktu paruh isotop dan pengaruh Dead-Time dalam analisis nuklir menggunakan Geiger Muller Counter RADLab.

Karakteristik Tes Two-Tier Keterampilan Proses Sains Ditinjau dari Aspek Hipotesis Berdasarkan Graded Response Model

2023-12-28T16:44:54+07:00

Science process skills in learning physics is one of the competencies that students must have. It’s because physics is part of Sains which has the essence of a way of investigating related to the scientific method approach. In a learning proces,it is necessary to develop instruments test that capable to assessing the achievement of student’s science process skills. The purpose of this research is to develope a two-tier multiple choice test for measuring science process skills of senior high school student using the graded response model (GRM) approach. This research used mix method with exploratory sequential design. The research participant used was 168 students at three of the public schools in the city of Tasikmalaya. The instruments in this study were 19 items of two tier multiple choice questions on science process skills. However, only 3 items were discussed, it's on aspects of science process skills in making hypotheses. The research data obtained was analyzed using the response item theory approach with the Graded Response Model (GRM). The results showed that science process skills test had good location parameters, a good discriminant index, a fairly good information function that is suitable for measuring students' science process skills in the moderate category. The two-tier multiple choices science process skills test in this study can be used as an alternative for teachers to identify students' science process skills in high school.

Pengembangan tes diagnostik berbasis seamleap untuk mengidentifikasi keterampilan literasi sains pada materi gerak harmonis sederhana

2023-12-28T07:52:09+07:00

This research aimed to develop a two-tiers diagnostic test to measure high school students' level of scientific literacy skills in the topic of simple harmonic motion; and SeamLeap application as a digital-based learning evaluation medium. The research design conducted was a mixed-methods approach with an exploratory sequential method. The sample for this study was determined using purposive sampling technique, involving 52 students of XI IPA of a public high school in Bandung, divided into 21 participants for the limited test group and 31 participants for the large-scale test group. Additionally, one physics teacher from the same school was included in the study. During the development process, the SeamLeap-based diagnostic test received assessments from expert validators, resulting in 97% (deemed very feasible) for the media aspect, 87% (deemed very feasible) for the material aspect, and 92% (deemed very feasible) for the instrument aspect. The revised version from the developmental process was then implemented to measure students' level of scientific literacy skills in simple harmonic motion, revealing that the students’ scientific literacy skills generally achieved 51% or a moderate level. The characteristics of the diagnostic test instrument were analyzed using the Partial Credit Model (PCM). This analysis indicated that the test instrument was reliable for assessing students with abilities ranging from -3 to +3 (from very low to very high), and the majority of items fell within the range of -0.68 to 0.83, indicating a moderate level of difficulty. Furthermore, based on the questionnaire feedback from users, the SeamLeap application achieved a feasibility rating of 75% and 76% respectively, indicating that SeamLeap was suitable for use as a medium for physics learning evaluation.

Penerapan pembelajaran fisika berbasis STEM pada materi gelombang bunyi terhadap peningkatan keterampilan creative problem solving siswa SMA

2023-12-28T17:11:19+07:00

Currently, learning is not only focused on knowledge aspects but also includes various skills that must be mastered such as critical thinking, creative thinking, collaboration, and communication. The purpose of this research is to test the implementation of STEM-based physics learning on the topic of Sound Waves in improving students' creative problem solving skill (CPS), as well as analyzing students' creative thinking skills based on the design and products created. The data collection of students' CPS skills using a test technique consisting of descriptive questions that are adjusted to the CPS aspects and the improvement is analyzed with the N-gain value. For students' creative thinking skills in design and products, it is measured using indicators based on the four aspects of Torrance's creativity and then categorized based on the scores obtained. The research method used is quantitative with a one group pre-test-post-test design. The sample used consists of 31 eleventh-grade students from one senior high school in Cimahi. The results of data analysis show an increase in Students' CPS skills in the high, medium and low categories. The average score for students' creative thinking skills in design is 3.02 (75.50%) in the creative category, while the average score for students' creative thinking skills in products is 3.04 (76.00%) in the creative category. This indicates that the Implementation of STEM- based Physics Learning on the topic of Sound Waves can improve high school students' creative problem solving skills, and students' creative thinking skills based on design and products created in creative category.

Mental model in physics education: a systematic literature review

2023-12-28T17:23:27+07:00

Penelitian ini bertujuan untuk mengkaji 34 artikel dari jurnal internasional bereputasi seperti terindeks Scopus, Web of Science (WOS) dan SINTA, yang menjelaskan penerapan model mental di Pendidikan Fisika. Artikel yang dipilih untuk ditinjau adalah yang diterbitkan dalam sepuluh tahun terakhir, dari tahun 2013 sampai dengan tahun 2023. Pendekatan penelitian yang digunakan adalah Systematic Literature Review (SLR). Penelitian ini menganalisis representasi penelitian menurut ciri-ciri umumnya terdiri dari jenis publikasi, tahun publikasi, pendekatan penelitian dan tingkat pendidikan. Studi ini juga menganalisis penerapan model mental dalam pendidikan Fisika dimana pada hasil artikel penelitian yang direview. Hasilnya menunjukkan bahwa penerapan model mental berdampak positif pada aspek kognitif, keterampilan dalam pembelajaran Fisika. Sehingga dapat digunakan oleh guru sebagai masukan untuk menerapkan model mental dalam pembelajaran Fisika.

Problem based learning in physics education: a systematic literature review

2023-12-28T17:32:00+07:00

The abstract arranged in a straight forward and concise manner and summarizes about: 1) a brief background (if any, just one or two sentences only); 2) The purpose and/or scope of research; 3) (brief) method used; 4) summary of results/ finding; 5) conclusion. Text length between 150-200 words (11pt) The purpose of this study was to examine the literature on problem-based learning models in studies related to scientific disciplines involving problem-based learning models for physics learning. The model is able to prove the conventional learning paradigm that accommodates learning in the 21st century. This research was conducted by analyzing 37 research journals related to problem-based learning models in physics learning published in the last ten years including peer reviewed articles and full text articles from Google undergraduate and also the ones that have been selected and indexed by Scopus, WOS or Sinta. This research approach is literature review. Overall, the results of this study indicate that learning by applying PBL in high school is the most widely used learning in the teaching and learning process. It is generally believed that PBL has a positive impact on education and can be used as an alternative model at all levels of Education.

Analisis visual attention peserta didik dalam menyelesaikan soal fluida dinamis menggunakan gaze plot-eye tracking

2023-12-28T17:45:14+07:00

This study aims to analyze and explore students' visual attention when working on dynamic fluid problems. Learners' visual attention is analyze and explore based on different cognitive levels of learners. There are three cognitive levels analyzed, namely high, medium, and low cognitive levels. The research method used in this research is explorative. The research sample amounted to 6 students from one of the private high schools in Bandung City from class XII Bilingual and XII MIPA. There are 2 students from each cognitive level. Data analysis was conducted using paired t-test analysis, gaze-plot, and interview transcripts. Each learner has a different eye-movement and information processing process that leads to a very diverse gaze-plot. In general, students pay more attention to relevant factors compared to irrelevant factors contained in the questions given.

Pengolahan limbah ampas teh, cangkang telur dan styrofoam sebagai adsorben untuk meningkatkan kualitas limbah laundry (air deterjen)

2023-12-29T08:13:59+07:00

Waste from the laundry process contains high concentrations of various chemicals, such as phosphate, surfactants, ammonia, methylene blue, nitrogen, as well as high levels of dissolved solids, turbidity, high BOD, and high COD. In the treatment of wastewater, one of the methods used is adsorption, and natural materials are often used as adsorbents. The commonly used material as an adsorbent is activated carbon. This study aims to determine the influence and effectiveness of three waste materials, namely tea waste, eggshells, and styrofoam as adsorbents to improve the quality of laundry wastewater. The research method used is literature review. Data collection was carried out by reviewing various journals and articles related to the three waste materials used as adsorbents in laundry wastewater containing hazardous chemical compounds. The articles and journals used were obtained from Google Scholar and several journal websites published in the last 10 years. Based on the results of this study, it was found that the most effective material used as an adsorbent for laundry wastewater is eggshells, followed by tea waste. This is proven by the porous structure of chicken eggshells which have high calcium carbonate nutrition and the physical properties of tea waste which have a wide surface area and fast adsorption kinetics.

Analisis hidrologi berdasarkan periode ulang parameter curah hujan untuk perhitungan kapasitas bendungan Lau Simeme

2023-12-29T09:04:34+07:00

Hydrological analysis was crucial in water infrastructure planning as it affected the planned flood discharge and construction stability. Exceeding the normal discharge could lead to floods. Flood risk analysis employed rainfall analysis. This study analyzed annual flood occurrences within the return periods of 2, 5, 10, 20, 25, 50, and 100 years. A return period was the interval within which a certain rainfall might occur, but not necessarily every T years. The study calculated rainfall values for various return periods (R) using the Normal Method, Log Person III Method, and Gumbel Method. The results revealed that the highest rainfall values were obtained with the Gumbel Method, specifically R2 = 107.080 mm, R5 = 130.618 mm, R10 = 144.358 mm, R20 = 154.965 mm, R25 = 157.914 mm, R50 = 166.723 mm, and R100 = 175.784 mm. These values were utilized to compute the Planned Flood Discharge (Q), which included Q2 = 2338.29 m3/sec, Q5 = 2855.71 m3/sec, Q10 = 3156.12 m3/sec, Q20 = 3387.91 m3/sec, Q25 = 3452.57 m3/sec, Q50 = 3645.07 m3/sec, and Q100 = 3843.18 m3/sec.

Evaluasi Sifat Fisik dan Keteknikan Material Berpotensi Longsor serta Hubungannya terhadap Kestabilan Lereng di Zona Sesar Lembang

2023-12-29T09:24:02+07:00

Lereng curam yang berasosiasi dengan sesar aktif mengakibatkan lereng menjadi rawan terhadap longsor. Pemahaman yang mendalam mengenai sifat fisik dan keteknikan material lereng pada zona ini penting untuk mengevaluasi kestabilan lereng. Pengambilan sampel tanah terganggu dan tidak terganggu telah dilakukan pada tiga titik di lokasi penelitian untuk melakukan uji secara menyeluruh di laboratorium. Uji yang dilakukan meliputi uji sifat fisik diantaranya uji berat isi, kadar air, porositas, derajat kejenuhan, berat jenis, batas-batas Atterberg, serta analisis saringan dan hidrometer, adapun uji keteknikan yang dilakukan adalah uji triaksial Consolidated-Undrained (CU) untuk mengetahui kohesi dan sudut geser efektif. Berdasarkan hasil uji sifat fisik yang dilakukan, diperoleh bahwa material berpotensi longsor merupakan material yang memiliki porositas yang cukup besar yakni dalam rentang 63.41% - 65.72% dengan konsistensi tanah yang lembab berdasarkan nilai kadar air pada rentang 27% - 34% dan derajat kejenuhan yang diperoleh pada 39%-50%, serta hasil uji batas-batas atterberg diperoleh batas cair pada rentang 55,85% - 68,90%, batas plastis pada rentang 40,16% - 50,48%, indeks plastis pada rentang 15,68% - 19,78% yang menunjukan material berupa tanah lanau dengan tingkat keplastisan yang tinggi. Hasil analisis besar butir dan hidrometer diperoleh distribusi ukuran butir yang didominasi oleh tanah lanau dan pasir sehingga dikategorikan sebagai tanah lanau berpasir. Berdasarkan hasil uji keteknikan didapatkan kohesi efektif sebesar 8,74 - 25,76 kPa dan sudut geser efektif sebesar 15,29º - 34,81º, nilai tersebut menunjukkan material memiliki kohesi yang lemah dan kekuatan geser yang kecil, sehingga memiliki kemampuan yang lemah dalam menahan gaya yang bekerja pada lereng. Material berkonsistensi lembab serta porositas dan keplastisan yang tinggi dengan kuat geser lemah dapat mempengaruhi kestabilan lereng, akibat hal tersebut lereng menjadi rawan longsor.

Profil Angin Udara atas di Bandara Kualanamu Berdasarkan Data Pengamatan Pilot Balloon (Pibal) Tahun 2014-2022

2023-12-29T10:09:31+07:00

The observation of upper air, scientifically referred to as aerology, constitutes a process aimed at vertically measuring meteorological parameters. The observation of upper air profiles is essential for comprehending the vertical movement of air masses within the atmosphere. One of the methods employed in wind observations across various atmospheric layers is through Pilot Balloon (Pibal) observations, whereby data on azimuth and elevation obtained through the use of a theodolite are converted into information regarding wind direction and speed. Currently, the utilization of Pibal data to support weather forecasting operations remains notably limited. For Bandara Kualanamu, a newly established airport, understanding upper air wind profiles becomes crucial in facilitating weather forecasting operations. This study was conducted to assess the vertical wind characteristics at Bandara Kualanamu based on Pibal observation data spanning the period from 2014 to 2022. The data processing for Pibal observations employed statistical methods and Hodograph analysis. The research findings reveal that the average wind speed at 18 UTC is higher compared to 06 UTC. There is a discernible trend of increasing wind speed with rising altitudes, with average wind speeds at altitudes ranging from 1000-3000 ft being approximately 6-7 kts, at 5000-7000 ft around 7-8 kts, and at altitudes above 10000 ft being at least 9 kts or higher. Monthly wind direction frequency distribution and Hodograph analysis indicate the presence of two alternating wind patterns, namely, northwesterly to northerly (NW-N) and east-southeastern (E-SE) winds. These patterns recur annually and are particularly pronounced at altitudes of 1000-3000 ft.

Uji serapan radiasi bahan timbal limbah aki untuk pemanfaatan bahan perisai radiasi

2023-12-29T10:37:26+07:00

The development of the automotive industry has the potential to increase the quantity of lead waste generated from damaged batteries. One way to reduce the adverse impact of lead waste that has persistent and toxic properties is to utilize lead plates in radiation shielding materials. Radiation shielding is one of the important tools in enforcing radiation protection for workers and the general public in hospital radiology installations. The purpose of this research is to test the value of the lead absorption coefficient from used batteries as an initial step in testing the feasibility of materials in the development of radiation shielding. Material uptake testing was conducted through X-ray exposure on slabs made from battery lead powder and resin with thickness variations of 2,5mm-15mm thickness variations. The exposure factor was set at a voltage of 80kV/32mAs with a collimation aperture of 10 cm x 10 cm. Based on the study, the average value of the attenuation coefficient of the used battery lead material was 0,3367/mm. This absorption value indicates that Lead derived from waste batteries can be used as an alternative to making radiation shields with consideration of the ability to absorb radiation, but the equivalence of attenuation with Pb to be used as an Apron in accordance with Bapeten provisions is still equivalent to 3.876mm.

Sistem pemantauan perilaku kucing berdasarkan isyarat bunyi menggunakan arduino UNO

2023-12-29T10:52:17+07:00

Having a pet is one of the hobbies that many people do because it can be an alternative in reducing excess stress. There are various types of pets including one that is widely maintained is a cat. Cat treatment itself requires special care, including in terms of recognizing the behavior performed by cats. It is intended that we can know the emotional state and needs that desired by the cat. In overcoming this, the research was conducted by creating a cat behavior monitoring system based on the sound cues (voice) produced. This monitoring system involves the use of two main components, namely the sound sensor as data input and Arduino UNO as data processor also there are several supporting components used as data output. The data processing method is carried out with the results of sound detection (e.g. meowing or purring) then identified its meaning which is then adjusted to the link between the character of the sound pattern obtained with the intended behavior such as hunger, wanting to leave the house, or feeling uncomfortable. With this monitoring system, there is a further potential application in understanding the communication between owners and their cats.

Pengukuran laju dosis radiasi untuk keselamatan keamanan ruang pemeriksaan di instalasi radiologi rumah sakit umum daerah Kabupaten Bekasi

2023-12-29T11:06:18+07:00

Radiology installations are supporting facilities in hospitals that utilize X-rays to diagnose a disease. X-rays are a type of ionizing radiation that if not monitored, can cause health problems for radiation workers and the surrounding community. It has been found that there is a door that cannot be closed tightly in one of the radiology installation examination rooms of the Bekasi Regional General Hospital which is suspected of having the potential to cause radiation safety and security problems. This study aims to determine the suitability of the radiation dose rate in the examination room area with the dose limit value determined by BAPETEN to ensure radiation safety and security. The study was conducted through radiation dose measurements in seven different areas which are controlled and uncontrolled areas with measurement points at a distance of 30 cm and 100 cm from the radiation wall. The results showed that the dose rate range in the controlled areas (areas A, B, C, E, and G) was 0.04-8.79 mSv/year at a distance of 30 cm, and 0.0-1.74 mSv/year at a distance of 100 cm. While in uncontrolled areas (areas D and F) is 0.04-0.21 mSv/year at a distance of 30 cm, and 0.00-0.06 mSv/year at a distance of 100 cm. This value shows that all measurement points produce radiation dose rate values that are less than the dose limit value determined by BAPETEN, which is less than 20 mSv / year in controlled areas and 1 mSv / year in uncontrolled areas, so it can be said that the radiology examination room of the Bekasi Regional General Hospital can be categorized as safe.

Pengembangan lembar kerja peserta didik (lkpd) berbasis inkuiri berorientasi kreativitas ilmiah pada materi elastisitas dan hukum hooke

2023-12-29T13:04:55+07:00

Learning in the 21st century emphasizes creative thinking skills. Inquiry learning in scientific inquiry could provide an active role to students. Scientific creativity in learning can sharpen scientific sensitivity. This research aims to analyze the worthiness of an inquiry based student worksheet oriented to scientific creativity in elasticity and hooke's law topic. This research used mix methods research with the exploratory sequential design. The research phases were document study, initial product design and other instruments, expert validation, product revision, product trials, results and interpretation, product final revision, and will get the final student worksheet. The research instrument were expert validation sheets, developed student worksheet, and student questionnaire sheets. The qualitative data was analyzed using Miles and Huberman models, the data of expert validation analyzed its worthiness criteria, the validity and reliability of product analyzed using e-IRT GRM (graded response model), and the data of student response processed using percentage equations. Student’s answers were judged on the scientific creativity’s indicators which is fluency, flexibility and originality. The developed student worksheet had characteristics that it based on inquiry learning strategy and SSCM (scientific structrue creativity model) which combines the trait, process, and product of creativity. Student worksheet be declared worthy by the expert validators with an average value 4.53. E-IRT analysis of student worksheet are valid and reliable with high realibility category, the value of Cronbach's alpha (α) 0.813. Student worksheet got a positive (excellent) response from students. The developed student worksheet could be an alternative to learning in physics subject

Profil respon siswa SMPIT dalam menyelesaikan soal fisika berwawasan Qur’ani pada materi global warming

2023-12-29T13:24:55+07:00

Penelitian ini bertujuan untuk mengetahui potret respon siswa dalam menyelesaikan soal IPA khususnya fisika yang berwawasan Qurani pada materi Pemanasan Global. Selain itu, untuk mengetahui profil kemampuan kognitif siswa, ranah yang akan diteliti meliputi ranah pengetahuan (C1), pemahaman (C2), dan penerapan (C3). Penelitian ini menggunakan desain penelitian pre-eksperimental One-shot Case Study- dengan metode kuantitatif deskriptif yang dimaksudkan untuk mendeskripsikan suatu fenomena secara akurat dan sistematis. Populasi dalam penelitian ini adalah siswa kelas VIII pada salah satu SMPIT di Kota Bogor tahun ajaran 2020/2021. Sampel yang digunakan diambil dengan teknik sampling jenuh dimana seluruh populasi dijadikan sebagai sampel. Sehingga data yang berhasil terkumpul sebanyak kurang lebih 64 orang. Berdasarkan hasil instrumen tes kemampuan kognitif siswa berwawasan Qur’ani pada materi global warming, didapatkan bahwa rata-rata kemampuan kognitif siswa pada ranah pengetahuan (C1) sebesar 59,13 dengan kategori sedang, ranah pemahaman (C2) sebesar 64,87 dengan kategori sedang, dan ranah penerapan (C3) sebesar 64,57 dengan kategori sedang. Dengan demikian, kemampuan kognitif siswa secara umum berada pada kategori sedang dengan nilai rata-rata sebesar 62,85. Berdasarkan instrumen non-tes berupa angket, rata-rata siswa memberikan tanggapan bahwa pembelajaran fisika dengan berwawasan Qur'ani, lebih efektif, membuat mereka lebih tertarik, dan semangat dalam mempelajarinya.

Pengukuran periode revolusi planet venus di lingkungan forum komunikasi astronom amatir lintas Jawa Timur (FOKALIS JATIM)

2023-12-29T14:07:18+07:00

The development of astronomy in Indonesia could not have been disconnected from the activities of amateur astronomy communities. These communities served as platforms for the exchange of knowledge and information among individuals who shared a passion for astronomy. In East Java, there were more than 29 astronomy communities distributed across various geographical areas, including universities and schools, complemented by the presence of overarching organizations that served as communication forums for each community. The Forum Komunikasi Astronom Amatir Lintas Jawa Timur (FOKALIS JATIM) was an organization that facilitated the active involvement of amateur astronomy communities and practitioners. The method employed for measuring the period of revolution of the planet Venus served as an example of research activities undertaken by one of the members of FOKALIS JATIM. Data acquisition involving the imaging of Venus's phases over a two-month interval was used as a means to measure the period of Venus's revolution. The findings underscored the significance of the active engagement of amateur astronomy communities and practitioners as a means to enhance public understanding of astronomy.

Integrasi RUSLE Berbantuan GIS untuk analisis estimasi erosi tanah di kabupaten ciamis

2023-12-29T15:57:34+07:00

Indonesia is a country that is prone to erosion because it is in a tropical climate with relatively high rainfall intensity and is supported by hilly topographic conditions in most areas. This research aims to determine estimates of soil erosion using the GIS-assisted RUSLE method in the Ciamis district area. This method focuses on five Factors, namely Rainfall erodibility Factor (R), Soil erodibility Factor (K), Topographic Factor (LS), Cropping management Factor (C) and Practice support Factor (P). Based on the Morgan classification, the estimated results of soil erosion in the Ciamis district are classified as high erosion with the highest soil loss value being 33.9645 tons ha-1 year-1.

Pengembangan Modul Pembelajaran Fisika Berbasis Problem Based Learning (PBL) dalam Meningkatkan Kemampuan Pemecahan Masalah Pada Materi Momentum dan Impuls

2023-12-29T19:46:11+07:00

Penelitian ini bertujuan untuk mengembangkan modul pembelajaran fisika berbasis problem based learning yang layak sebagai sumber belajar peserta didik dan dapat meningkatkan kemampuan pemecahan masalah. Penelitian ini menggunakan metode R&D (Research and Development) dengan menggunakan desain ADDIE. Partisipan dalam penelitian ini adalah 3 orang ahli dan 25 peserta didik kelas X di SMAN 27 Garut. Hasil penelitian ini menunjukan bahwa modul pembelajaran fisika berbasis problem based learning ini sangat layak untuk digunakan di sekolah bersadarkan kelayakan konten dan media serta mendapatkan respon yang positif dari peserta didik. Selain itu, pada penelitian ini juga menunjukan bahwa modul ini mampu meningkatkan kemampuan kognitif serta dapat meningkatkan kemampuan pemecahan masalah pada proses pembelajarannya.

Karakterisasi tes keterampilan berpikir kritis dalam aspek evaluation berdasarkan graded response models

2023-12-29T19:57:28+07:00

Information, knowledge, and technology are currently developing very rapidly as the world has entered the 21st century. Therefore, the role of educational institutions is very important to prepare students to have skills that support this century, one of which is critical thinking skills. Students' critical thinking skills can be identified through measuring instruments that can stimulate students to think critically. However, in reality, educators rarely develop measuring instruments that can identify critical thinking skills because it takes a long time and is difficult to construct and analyze these measuring instruments. This study aims to determine the characteristics of critical thinking skills tests in the aspect of evaluation based on Graded Response Models. This type of research is a quantitative descriptive research. The research population taken was all students of class XI SMA Negeri in Cianjur Regency with a sample of 132 students from three different schools. The sample was determined by using purposive sampling combined with convenience sampling. Research data was taken through a critical thinking skills test in the form of a four-tier diagnostic test instrument with 20 items oriented to aspects of critical thinking skills according to Facione (2020), namely interpretation, analysis, evaluation, inference, explanation, and self-regulation. The main focus in this research is the 3 items developed based on the evaluation aspect. Data analysis carried out in this study was based on item response theory with Graded Response Models assisted by the eirt 2.0.3 software. The results of the test characteristic curve analysis show that the critical thinking skills test on the evaluation aspect obtains a discriminating power in the range of 0.60 to 1.11 which is included in the good category. Meanwhile, the difficulty index (bjk) is in the range of -0.99 to 5.06 with a different difficulty index for each category. The information peak of the information function curve for each item in the evaluation aspect lies in the range of 0.69 to 1.71. This shows that this test can measure students' critical thinking skills in the evaluation aspect from moderate to high abilities.

Uji kelayakan apron sebagai alat pelindung diri (APD) radiasi sinar X di instalasi radiologi salah satu rumah sakit kota Bandung

2023-12-29T20:10:21+07:00

One of the personal protective equipment used by radiation workers in the protection of X-ray radiation exposure is an Apron made of lead (Pb). Referring to the quality control guidelines for radio diagnostic equipment, that the way to store and place the Pb Apron is not folded and not hung, and periodic apron leak testing is carried out. This study aims to test the feasibility of an Apron in the Radiology Installation of one of the Hospitals in Bandung City. The study was conducted on 3 aprons that were suspected of being damaged by giving X-ray exposures and then identified the area of cracks observed. The crack area obtained was then compared with the tolerance value of the crack area based on the literature, namely 15mm² in vital areas and 670 mm² in non-vital areas. The results show that there are cracks on apron 1 in quadrants 1 and 2 of 3,76 mm², 1,35 mm², 6,32 mm² and 2,59 mm² in the chest area. There are no cracks on apron 2 and 3, but there are stains on apron 3. Based on this research, it is known that apron leakage in the Radiology Installation of one of the Hospitals in Bandung City is still tolerable and still suitable for use.

Analisis kondisi parameter atmosfer dan geografis observatorium astronomi Sunan Ampel Surabaya

2023-12-29T20:43:55+07:00

As an observatory located in the middle of the city and surrounded by tall buildings, OASA needs to really pay attention to the atmospheric and geographical conditions in its surroundings, with the aim of determining the focus and direction of future development of the observatory. This research examines the conditions of atmospheric parameters around the observatory which include seeing, extinction and sky brightness based on the results of night sky observations. This research also reviews geographical conditions related to the location and topography of OASA as an observatory. Based on observations made on July 21 2023 using the stars Arcturus and Tarazed, the visible value of the atmosphere around OASA is 1.8 arc seconds, with extinction coefficient and sky brightness values of 0.3 and 17.83 MPSAS. The results of this research show that OASA has poor atmospheric quality, especially in the area around the horizon which shows a decrease in the quality of the appearance of celestial objects as they approach the horizon. Apart from that, geographically OASA also has many obstacles around it. horizon, especially on the western horizon at an azimuth position of 277° to 300°, which makes OASA less supportive of the rukyatul hilal observation process.

Penerapan STEM-PjBL dalam Meningkatkan Keterampilan Berpikir Kreatif Siswa pada Materi Dinamika Rotasi dan Kesetimbangan Benda Tegar

2023-12-30T08:41:58+07:00

Creative thinking skills need to be improved as one of the 21st century skills needed by students. These creative thinking skills have not been fully mastered by students in Indonesia. This study aims to analyze the improvement of students' creative thinking skills through the application of STEM-PjBL on dynamics of rotation and rigid body equilibrium materials. The method used in this study is a quantitative method with a one-group pretest-posttest design. The sample in this study was 30 students at a high school in Bandung. The instruments used were observation sheets of the implementation of learning and creative thinking skills test. The application of STEM-PjBL results in an increase in each indicator of creative thinking skills. The indicator of fluency increases by 0.25 in the low category; the indicator of flexibility increased by 0.44 in the medium category; the indicator of elaboration increased by 0.82 in the high category; and the indicator of originality increased by 0.68 in the medium category. Overall, students' creative thinking skills increased by 0.55 in the medium category.

Uji densitas phantom akrilik menggunakan pesawat fluoroscopy

2023-12-30T08:45:24+07:00

Bone diseases were often suffered by patient due to an unhealthy lifestyle, thus, it is necessary to study the bone density for patient who suffered from human diseases such as osteoporosis. One way to determine bone density using X-rays, and the machine required equipment with expensive costs, and not all hospitals had such bone density devices. The purpose of study is assessing the bone density through a measurement method involving X-ray Fluoroscopy and analize the density values of materials. In this research, several acrylics as phantom with four thickness variations of 10cm, 15cm, 20cm, and 25cm, respectivelies, as well as a Fluoroscopy X-ray, were utilized. The research results yielded a bone density value of 0,1047 cm³/g for the acrylic phantom.

Pengaruh Suhu Annealing Sintesis Nanopartikel TiO2 Fasa Rutile untuk Aplikasi DSSC pada Fotosuperkapasitor

2023-12-30T08:49:50+07:00

Photosupercapacitors are integrated devices that combine dye-sensitized solar cells (DSSC) and supercapacitors. This device functions as an energy conversion as well as energy storage in one system. The photoanode is one of the important parts of the DSSC in converting photons into electrons. TiO2 semiconductor material-based photoanodes are often used because of their good light-absorbing ability. This study aims to determine the effect of annealing temperature variations on the synthesis of rutile phase TiO2 in photosupercapacitor applications. The coprecipitation method was used in the synthesis of TiO2 with variations in annealing temperature 400 ℃, 500 ℃, 600 ℃, and 700 ℃. Characterization of TiO2 structure and morphology using XRD and SEM-EDX. Fabrication of photosupercapacitors was carried out using the sandwich method. XRD results show that there are two phases formed, namely anatase and rutile phases with a tetragonal crystal system in all samples with the largest particle size of 40.5 nm at 700 ℃ annealing temperature. From the SEM-EDX results, it can be seen that the morphology of TiO2 nanoparticles tends to agglomerate and has a mass presentation of Ti in TiO2 particles of 76.08 wt%. Charge-discharge tests on the performance of AC/CB/BaTiO3 electrodes showed a specific capacitance of 15.405 F/g. J-V characterization of the photosupercapacitor showed that the ZnO/TiO2 photoanode had an efficiency of 0.08%.

Pengembangan Interactive Digital Modul Physics (IDMP) Berbasis Model Physics Independent Learning (MPIL) pada Konsep Kinematika Gerak Lurus

2023-12-30T08:54:40+07:00

Physics learned in the 21st century emphasizes independence in learned. The process of internalizing students' knowledge in learned must been on their initiative without depending on others. An alternative that could been done to foster student independence in learned was to apply the physics independent learning model integrated into digital learned media in the form of modules. Model Physics Independent Learning (MPIL) encourages students to solve problems with scientific approaches such as investigation, collaboration, discussion, and presentation. This researched was development researched (research and development) with the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation) which aims to develop physics independent learning-based digital modules. Digital modules were made used canva assisted by heyzine flipbooks to created a more interesting learned atmosphere and easily accessible to students. The result of this researched was an Interactive Digital Physics Module (IDMP) based on Model Physics Independent Learning (MPIL) on the topic of kinematics of straight motioned that could support independent learned.

Studi bawah permukaan menggunakan metode geolistrik resistivitas dan ground penetrating radar (GPR): Studi kasus di area pembangunan gedung kampus STMKG Tanah Tinggi Tangerang

2023-12-30T08:59:23+07:00

The bedrock is an essential component in the planning of high-rise building construction. The depth of the bedrock and the classification of the rock types above it can serve as crucial considerations in the construction planning of high-rise buildings in a particular area. The presence of bedrock provides guidance for determining the foundation of the building's structure. Bedrock, characterized by its hard texture, also serves as a reference for distributing loads on the ground and understanding the effects of infrastructure development on its surface. In this research, the author focuses on utilizing two methods, namely Electrical Resistivity Tomography (ERT) and Ground Penetrating Radar (GPR), to classify the types of rocks beneath the Earth's surface and identify the bedrock. The primary objective of this study is to identify the depth of the bedrock and classify the types of rocks that constitute the subsurface. Based on the analysis of geoelectric resistivity and ground-penetrating radar data, it can be concluded that the construction area of STMKG Tanah Tinggi Campus in Tangerang has the following layers: the first layer consists of sandy soil, backfill soil, and topsoil with resistivity values ranging from 1.28 Ohm to 4.64 Ohm. The subsequent layer is composed of soft soil with resistivity values ranging from 4.64 Ohm to 7.14 Ohm, and medium soil with resistivity values ranging from 11.0 Ohm to 26.0 Ohm.

Prototipe Sistem Monitoring Tinggi Muka Air Dan Curah Hujan Waduk Situ Parigi Berbasis Website

2023-12-30T09:06:37+07:00

Indonesia was an area with high rainfall, especially during the rainy season. This phenomenon created the potential for floods due to river and dam overflow. Situ Parigi was an artificial lake in the Kelurahan Perigi Lama and was an area that required careful monitoring. At that time, supervisors manually checked water levels at the sluice gates every morning and evening, particularly during heavy rainfall. In order to facilitate the monitoring process and enhance disaster preparedness, an early warning system was designed with the aim of mitigating potential disaster impacts. This research aimed to design a high-water level and rainfall monitoring system that played a role in monitoring and providing early warnings for water level changes. The system consisted of various components, including the JSN-SR04T sensor, water level float sensor, magnet hall effect sensor, strobe light, NodeMCU ESP8266, and power sourced from the main electricity grid (PLN) as well as backup batteries. Measurement data such as water level heights, rainfall every 10 minutes, and daily rainfall were displayed through an informative website interface, featuring measurement values, tables, and graphs. Furthermore, the device was equipped with a warning mechanism through a strobe light when water levels exceeded predefined thresholds, along with notifications for water level and rainfall status. Testing demonstrated the system's strong performance. Measurement data was successfully sent to the database at 10-minute intervals. The water level float sensor had an error rate of 0%. Meanwhile, the JSN-SR04T sensor with a protective pipe had an error rate of 0,25%. Moreover, the hydrological services rain gauge used had a resolution of 0.2 mm.

Peluang augmented reality dalam e-modul untuk meningkatkan hasil belajar dan motivasi pada pembelajaran fisika: systematic literature review

2023-12-30T09:13:33+07:00

Augmented reality (AR) is one of the technologies that visualize something and can be applied to education. One of them, AR can be applied to teaching materials such as e-modules so that students can visualize physics concepts easily. This study aims to determine the effects and opportunities of using AR in e-modules in physics learning on learning outcomes and student motivation. The research method used a systematic literature review. Data collection is done by reviewing various articles from various physics learning journals. The articles and journals used came from Google Scholar and several international journal websites published in the period 2018-2022. Based on the results of this study, the application of AR in e-modules in physics learning can improve students' cognitive learning outcomes. The application of AR in e-modules has the opportunity to increase student’s motivation.

Perbandingan diameter sudut dan selisih jarak tampak bulan menggunakan persamaan matematis ZACAAS untuk Afocal Astrophotography pada fenomena Sturgeon Moon dan Blue Moon sebagai bahan materi lembar kerja peserta didik

2023-12-30T11:47:53+07:00

The Cakrawala UPI Research Center (Cakrawala Sky-Discern Station), situated in Bandung, conducted a scientific investigation of the supermoon phenomenon, often referred to as the sturgeon moon and blue moon. The primary objective of this study was to ascertain the variations in angular diameter and visible distance between these phenomena in comparison to a standard full moon. Three sets of images were captured on the dates June 3, August 1, and August 31, 2023, employing consistent methodologies, instruments, and geographical locations. The instrumentation utilized included a Samsung Galaxy A12 smartphone camera, a Sky-Watcher Telescope N 130/650 Starquest EQ (a reflector telescope), and a 25mm eyepiece. It's noteworthy that all images were concurrently obtained. The distinctions among these phenomena were analyzed using specialized astronomy software, AstroimageJ. Our analysis involved calculating the difference in pixel diameter, acquired from AstroimageJ, and estimating the variance in visible distance through the application of the small angle theorem. The angular diameters, computed utilizing the mathematical equation known as ZACAAS, for the dates June 3, August 1, and August 31, were 1864'', 1942'', and 1969'', respectively. Correspondingly, the visible distances were determined to be 368,658 km, 356,164 km, and 355,033 km. Based on this empirical data, we confidently assert that, within the context of this particular astronomical phenomenon, the blue moon exhibits macro characteristics, while the sturgeon moon displays micro attributes, owing to its larger angular diameter and shorter visible distance. These findings, derived from authentic astronomical observations conducted using the afocal astrophotography technique, hold potential for integration into educational materials for students studying astronomy.

Sitem Peringatan Dini Banjir Berbasis Machine Learning - Algoritma Random Forest dan Gradient Boosting (Studi Kasus – DAS Ciliwung Jakarta)

2023-12-30T12:15:52+07:00

Flood is one of the natural disasters that frequently occurs in Indonesia, especially during the rainy season. One of the factors that triggers flooding is the overflowing water level of rivers. The use of technology to predict river water levels has been widely implemented. One of the technologies employed is the machine learning technique. This technique can learn patterns from provided data and produce accurate predictions. In this research, a model is designed to predict river water levels using historical data spanning 5 years from the Ciliwung-Cisadane River Basin Agency and BMKG. The dataset undergoes data preprocessing and is then processed using machine learning techniques. The algorithms employed are random forest and gradient boosting algorithms. Both algorithms are assessed in terms of performance by comparing the evaluation metrics RMSE, MAE, and MAPE. The Gradient Boosting algorithm is selected based on its superior performance evaluation, utilizing a parameter combination of n_estimators at 200, max_depth at 5, max_features at 3, min_samples_leaf at 1, and min_samples_split at 4, resulting in MAE and RMSE values of 0.0018 and 0.0163, respectively. With the findings of this research, it is expected to contribute to the development of more accurate river water level prediction technology and aid in making preventive decisions prior to flooding occurrences.

Studi laju kehilangan massa pada evolusi bintang maharaksasa merah

2023-12-30T12:36:50+07:00

The post-main sequence evolution in massive star evolution is a complex process that depends on various stellar model parameters. One of these numerous parameters is stellar mass loss. This study aims to analyze the lifetime of stars in the Red Supergiant (RSG) phase, their evolutionary tracks on the Hertzsprung-Russell (HR) diagram, and several other physical parameters that undergo changes when the mass loss rate during the RSG phase is increased. The Modules for Experiment in Stellar Astrophysics (MESA) program is utilized as a computational tool to create simulations of the evolution of massive star models from the main sequence to the core temperature (T_c) reaching 10⁹ K. The constructed models are non-rotating single stars with initial masses of 12M⊙, 15M⊙, 20M⊙, and 25M⊙, with a metallicity of Z=0.02. The obtained results show that an increase in mass loss rate during the RSG phase significantly influences the evolutionary tracks of massive stars in the post-main sequence phase. Additionally, this phenomenon plays a role in determining the progenitor of massive stars before the occurrence of supernova events. For models with larger masses, an increased mass loss rate does not significantly affect the total mass lost during the RSG phase, but it does influence the duration or lifespan spent in the RSG phase.

Pengembangan modul digital berbasis project based learning (PjBL) pada materi fluida statis

2023-12-30T13:06:31+07:00

In the era of digitalization, teaching modules are self-learning materials that contain a series of learning experiences. In the context of the development of information technology, modules in the form of books have been transformed into digital modules or electronic modules used in online learning. In Indonesia, the independent curriculum emphasizes the importance of keeping up with technological developments in an effort to improve the quality of education. It promotes a relaxed, comfortable and enjoyable learning atmosphere, focusing on creative thinking and enhancing learners' character and natural talents. In an effort to integrate the project-based learning model with sway-assisted digital modules, researchers developed a Project Based Learning (PjBL)-based sway-assisted digital module for Static Fluid material. Where there are 40 respondents of students in one of the high schools in Jakarta 42.9% of students find it difficult and the media used in learning Static Fluid material is less interesting. The purpose of this research is to create a PjBL-based digital module that is suitable for physics learning. Researchers used the Research and Development (R&D) research method by applying the ADDIE model, which consists of five stages: (1) Analysis, (2) Planning, (3) Development, (4) Implementation, and (5) Evaluation. This digital module can be accessed easily through gadget devices or PCs, and students can use it independently to improve students' understanding of Static Fluid material.

Trend of Game-Based Collaborative Learning Range 2009 – 2023: A Analysics Bibliometric

2023-12-30T13:13:27+07:00

This study examines 748 articles from 362 sources about Game-Based Collaborative Learning (GBCL) metadata sourced from Scopus which were published between 2009 – 2023 using bibliometric analysis and quantitative descriptive mapping methodology to explore the latest GBCL research trends. These papers were statistically analyzed for the number of articles, countries, institutions, authors, journal sources, and keywords of articles published each year in the last 15 years. As a result, the number of articles, citations, institutions and personnel involved in research on GBCL showed an overall upward trend in the past 15 years, but this topic experienced a drastic decline in 2023. China has published the most papers and has the strongest influence on this topic. North Carolina State University is the largest affiliated institution. Proceedings of the European conference on games-based learning is a relevant source that publishes the most publications. Lester J is the author with the largest number of articles. The keywords that appear most often are game based learning, students, and collaborative learning.

Profil Keefektifan Strategi Teaching and Learning Trajectory dan Capaian Pembelajaran pada Materi Interferensi Gelombang

2023-12-30T13:26:41+07:00

The quality of a department in a university can be seen from the ability of students to present the material they master, especially in the physics education department Teaching and Learning Trajectory is a concept with a planned and structured learning journey to achieve learning objectives. Such assignments made during the presentation will prove the extent to which students understand the material presented by the presenter. With descriptive analysis on student answers to the results of answers to several questions given during the presentation process. The research respondents were 32 students who took the Basic Physics 2 Class B course in the even semester of the 2022-2023 academic year. Learning achievement based on gender, the learning achievement of the male group is higher than the learning achievement of the female group. The question with the smallest average score is the 7th question which is a question about understanding in the form of multiple choices that must be answered by including an explanation. Overall, this research reflects the innovation and improvement of science in the field of physics learning, especially on wave interference material. The findings provide new insights and a better understanding of the differences in learning outcomes based on gender as well as the effectiveness of the learning methods used.

Penerapan pendekatan STEM (Science, Technology, Engineering, Mathematics) Dalam meningkatkan kemampuan berpikir kritis dan hasil belajar siswa pada materi gaya, kerapatan, dan tekanan

2023-12-30T13:39:29+07:00

In the 21st century, rapid scientific and technological advancements have led to increased integration of knowledge. The fourth industrial revolution has emphasized the need for creative and critical thinking in education. To foster critical thinking, the independent learning curriculum has been implemented. However, many students, particularly in physics classes at SMA Negeri 50 Jakarta, lack critical thinking skills, resulting in low learning outcomes below the minimum passing grade (KKM). To address this, the STEM approach was adopted to enhance critical thinking and learning outcomes. The research's focus was to introduce STEM at SMA Negeri 50 Jakarta, aiming to investigate the impact of the STEM (Science, Technology, Engineering, Mathematics) approach on improving critical thinking and learning outcomes in the context of the Force, Density, and Pressure subject at the high school level. This quantitative study's objective was to empirically assess how the implementation of the STEM approach influenced students' critical thinking skills and learning outcomes in the subject. The research considered independent and dependent variables, with critical thinking ability as the dependent variable and the STEM teaching approach as the independent variable. The research design chosen was the Nonequivalent Pretest-Posttest Control Group Design, intending to observe the enhancement of critical thinking skills in the experimental group through STEM teaching. Initial data were derived from Grade XI students' final examination scores at SMA Negeri 50 Jakarta in the academic year 2022/2023. The study employed pretest and posttest scores as data collection tools, utilizing descriptive questions related to critical thinking indicators. By analyzing the difference between pretest and posttest scores and calculating the normalized gain, the study aimed to determine the improvement in critical thinking abilities in both classes.

Profil Pemahaman Konsep Suhu dan Kalor pada Siswa Sekolah Menengah Atas di Indonesia

2023-12-30T14:35:38+07:00

Physics is a branch of science that deals with microscopic and macroscopic understanding of life which is believed to be difficult to understand. This is because physics has abstract concepts, one of which is the concept of heat and temperature. This study aims to determine the conceptual understanding profile of high school students in Indonesia on the concepts of heat and temperature. This research is a preliminary study to develop a mental model instrument related to the construction of high school students' understanding. This study uses a descriptive quantitative method with a survey approach. This study involved 262 high school students in Indonesia spread across Riau, West Java, and Banten. The survey used was adapted from the Thermal Concept Evaluation developed by Yeo and Zadnik with Indonesian culture and language adjustments. The results of this study will be processed using the Rasch Model to determine the categories of students' abilities and the level of topic difficulty. Based on the analysis, there are 6.83% of students who have sufficient understanding of the concept of temperature and heat material.

Investigating research trends in augmented reality in physics education: a bibliometric and visualized analysis

2023-12-30T14:38:11+07:00

In recent years, Augmented Reality (AR) has mushroomed, especially in the education sector. However, only a few articles review research trends in the application of AR to learning Physics. For this reason, this article aims to investigate the research trend of Augmented reality (AR) in physics education and describe visualisation based on bibliometric analysis. The Scopus database is processed through Biblioshiny and VOSViewer for publications about AR in physics education. In selecting publications, a bibliometric analysis was performed on several documents based on country, institution, journal, publication, author, and co-occurrence of the author's keywords. The research method used is descriptive quantitative, with bibliometric visualisation used to analyse and visualise the characteristics of the selected publications. A total of 204 publications were selected following research criteria between 2013 and 2018. The results revealed that students, virtual reality, educational computing, e-learning, engineering education, and physics education were the most studied concepts in Augmented Reality research. Journal of Physics: Conference Series is the most relevant source. Indonesia is the most important country in this research because it has 20 articles and 20 single-country publications, while Bakri F. and Wibowo F.C. is the most influential writer. The top institutions in this study were Jakarta State University and International Information Technology University.

Profil capaian pembelajaran dan keefektifan strategi teaching and learning trajectory pada materi hukum biot savart

2024-01-02T09:23:34+07:00

Penelitian ini bertujuan untuk mengevaluasi efektivitas strategi teaching and learning trajectory dalam meningkatkan pemahaman mahasiswa tentang materi hukum Biot Savart. Metode penelitian yang digunakan adalah analisis deskriptif dengan menggunakan analisis dokumen. Strategi ini menggunakan presentasi dengan beberapa pertanyaan sebagai tolak ukur capaian pembelajaran. Data diperoleh dari 32 mahasiswa yang mengikuti presentasi pada mata kuliah Fisika Dasar 2 kelas B pada semester genap 2022-2023. Hasil penelitian menunjukkan bahwa strategi teaching and learning trajectory efektif dengan rata-rata capaian pembelajaran (82,59%) dalam meningkatkan pemahaman mahasiswa tentang materi hukum Biot Savart. Selain itu, terdapat perbedaan dalam capaian pembelajaran antara mahasiswa perempuan dan laki-laki, capaian mahasiswa perempuan (82,54%) dengan mahasiswa laki-laki memiliki capaian pembelajaran yang lebih baik (82,86%). Jawaban dengan skor rata-rata terkecil ialah pada pertanyaan ke-2 (30,6%) yang merupakan pertanyaan mengenai Wahyu Memandu Ilmu. Analisis juga menunjukkan perbedaan dalam keterlaksanaan presentasi antara kelompok mahasiswa dalam menjawab pertanyaan pada setiap langkah presentasi. Temuan ini menekankan pentingnya memperhatikan tingkat kesulitan pertanyaan dan memberikan arahan yang jelas kepada mahasiswa selama presentasi. Meskipun temuan ini memberikan pemahaman awal yang menarik, diperlukan penelitian lebih lanjut dengan sampel yang lebih besar dan beragam untuk memvalidasi temuan ini. Faktor-faktor lain yang memengaruhi capaian pembelajaran juga perlu dipertimbangkan dalam penelitian mendatang.

Efektivitas Model Pembelajaran PjBL-STEAM Terhadap Kemampuan Pemecahan Masalah Peserta Didik

2024-01-02T09:35:57+07:00

PjBL-STEAM is an instructional approach that integrates problem-solving with the concepts of science, technology, engineering, arts, and mathematics. Development of problem-solving skills: PjBL-STEAM emphasizes the development of problem-solving skills that involve critical thinking, collaboration, and creativity. Through problem-based learning integrated with STEAM concepts, students have the opportunity to actively sharpen these skills. This research aims to investigate the effectiveness of the PjBL-STEAM learning model using the pretest-posttest control group design method, involving two groups of the PjBL-STEAM learning model using the pretest-posttest control group design method, involving two groups of high school students. The experimental group receives instruction using the PjBL-STEAM model, while the control group receives conventional instruction. The students' problem-solving skills are measured using a valid and reliable test instrument. The research findings show that the PjBL-STEAM learning model significantly improves the problem-solving skills of high school students. These findings indicate that the PjBL-STEAM approach can be effective in enhancing the problem-solving skills of high school students.

Studi Pendahuluan: Pengembangan Multimedia Pembelajaran Interaktif Berbasis PBL Guna Meningkatkan KPM Fisika Peserta Didik

2024-01-02T09:45:45+07:00

Problem-solving skills (KPM) are becoming crucial for students as part of the skills needed in the 21st century. Learning with conventional models makes students untrained in KPM. The limitations of teachers in the development of learning media make learning still a transfer of science. The research aims to identify the needs of teachers and pupils towards the development of multimedia interactive learning to improve physical skills. In this study, the 4D method was used. This research is new to the definition stage which includes literature studies and field studies. Studies of literature show that there is no research on the development of multimedia interactive learning based on PBL in terms of knowing the physics of the pupils. The results of the field study show that both teachers and pupils need to develop PBL-based interactive learning multimedia. The conclusion is based on the results of this research and will be carried out on the development of interactive multimedia based on PBL to improve the physical KPM students to know the validity, effectiveness, and practicality later when implemented in school learning activities.

Karakteristis Instrumen Tes Keterampilan Berpikir Kritis Siswa SMA Pada Materi Fluida Statis Menggunakan Analisis Teori Respon Butir

2024-01-02T09:55:50+07:00

This study aims to obtain the characteristics of the critical thinking skills (KBK) test instrument which is constructed in 7 essay questions on static fluid material. The test instrument measures five KBK indicators and analyzed using item response theory (TRB). The research method is mixed methods with the exploratory sequential design. The expert validation were analyzed using the GRM by eirt, showing that the test was declared valid based on the information function which the range -2 to +2. Field trials of 133 students were analyzed using the rasch model by winstep application. The Outfit MnSq, ZStd and PT-Measure Correlation values show that all questions are valid. The item reliability value of 0.94 means that the reliability of items is very good category, the person reliability value of 0.73 means that the reliability of persons is the good enough category, and the Cronbach Alpha value of 0.75 means that correlation is good category. For the level of difficulty, the most difficult item is item 7 with measure item value of 0.62 and the easiest item is item 1 with measure item value of -0.49. So, that the test can be declared valid and reliable for use with the item difficulty level being moderate.

Pengembangan Bahan Ajar Mobile Learning Energi: Uji Coba Terbatas dan Validasi Ahli untuk Mengukur Keterbacaan dan Kelayakan Bahan Ajar

2024-01-02T10:22:15+07:00

Penelitian ini bertujuan untuk menguji kelayakan bahan ajar berbasis mobile learning dengan tema krisis energi untuk melatihkan literasi energi serta keterampilan pemecahan masalah kreatif siswa sebelum diujicobakan atau diimplementasikan di sekolah. Bahan ajar ini dikembangkan menggunakan model ADDIE dan dalam proses pengembangannya dilaksanakan judgment dari ahli materi (subject expert) untuk menilai kelayakan bahan ajar secara konten IPA, judgment dari ahli media/IT untuk menilai kelayakan mobile learning yang dikembangkan, serta uji coba terbatas kepada siswa untuk mengukur keterbacaan dan keterpahaman dari bahan ajar yang dikembangkan tersebut. Hasil judgment dari ahli materi menunjukkan rata-rata presentase kelayakan sebesar 88% yang termasuk pada kategori sangat layak. Hasil judgment dari ahli IT/media menunjukkan rata-rata kelayakan sebesar 90% yang termasuk pada kategori sangat layak. Sedangkan uji coba terbatas menunjukkan 27 wacana yang terdapat pada bahan ajar memiliki rata-rata keterbacaan / keterpahaman sebesar 79% yang termasuk pada kategori tinggi. Bahan ajar berbasis mobile learning ini akan direvisi terlebih dahulu sesuai masukan dari expert judgment dan hasil uji coba terbatas sebelum diujicobakan di sekolah

Studi Perubahan Sifat Struktur dan Termodinamik Pelipatan Protein Model H0P Menggunakan Simulasi Monte Carlo dengan Algoritma Wang-Landau

2024-01-02T12:58:57+07:00

Protein folding is a process of folding a protein from a one-dimensional form into a three-dimensional shape as its functional form, and this process is very challenging to be experimentally investigated due to the highly complex shape of proteins. Therefore, a simplified protein shape model and a method for simulating protein folding are needed. The model used in this research is the H0P model, where the protein-forming amino acids are mapped into 3 monomers: 'H' for hydrophobic, '0' for neutral, and 'P' for polar. In this study, the protein folding was simulated using Monte Carlo (MC) simulation with the Wang-Landau (WL) Algorithm. The purpose of the WL algorithm is to directly calculate the density of states (DOS), then calculate thermodynamic quantities such as specific heat (Cv), and structural quantities such as radius of gyration (Rg) and tortuosity (τ). Based on the curves of Cv(T), Rg(T), and τ(T) changes, it was found that protein folding undergoes two processes, namely coil-globule collapse and folding transition.

Simple Fabication and Photocatalitic of ZnO Nananoflower with Spray Coating Method for Photosupercapacitor Application

2024-07-19T10:14:51+07:00

The increase in consumption of electrical energy makes the energy sector important, so that new and renewable alternative energy sources are needed. Photosupercapacitor is a unique device for harvesting and storing energy that can be used as an alternative energy source composed of supercapacitors and DSSC (Dye-Sensitized Solar Cell). This research shows the character of ZnO which has nanoflower which can improve the performance of photosupercapacitors. In this study, DSSC was fabricated from ZnO nanoflower using a spray coating combined with TiO₂ as a photoanode, while the supercapacitor was fabricated from BaTiO₃. Variations spray coating are used to determine its effect on the performance of the photosupercapacitor. The results of XRD analysis showed that the greater the pressure and the size of the spray, the greate crystallinity and size of the crystal particles. The results of SEM analysis showed that the ZnO nanoflower formed at a pressure of 5 bar with the highest porosity of 57.80%. The effect of pressure and spray ZnO nanoflower on photosupercapacitor performance was investigated by UV-vis characterization. In addition, by using the solar simulator test, the DSSC efficiency of 7.02% was obtained. Supercapacitors that function as energy stores in photosupercapacitors.test charge discharge show that the supercapacitor has a specific capacitance of 29.20 F/g.technique spray coating succeeded in forming ZnO nanoflower and increasing the photosupercapacitor performance.