Journal Universitas PGRI Semarang
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Resistivity of SnO2 Gas Sensor to Humidity, CO2 Gas, and Temperature in Food Decomposition Process
No full textThis study aims to determine the sensitivity of a gas sensor based on a Cu substrate coated with SnO2 through an electroplating process, involving variations in electrolyte solution temperature and thermal oxidation. The deposition parameters were set as follows: electrolyte solution prepared by dissolving SnCl2 in distilled water, applied voltage of 4.5 V, electrode distance of 3 cm, and electroplating duration of 3 minutes. Sensor sensitivity tests were carried out by observing the food decomposition process, placing both the food sample and sensor in a testing chamber. Data acquisition of temperature, humidity, CO2 concentration, and sensor resistance was conducted using transducers and Logger Pro software. Based on the results, the sensor sample with an electrolyte temperature of 60°C (sample B) exhibited better performance than the sensor sample with an electrolyte temperature of 30°C (sample A). Sample B demonstrated greater responsiveness to temperature changes, with a coefficient of determination R2 = 0.66943. It also showed better detection of CO2 concentration changes with R2 = 0.98225. This improvement is attributed to a more effective electroplating process, as indicated by the mass change and thickness of the SnO2 layer. The sensitivity of sample B, defined by the equation S([CO2]) = 9.42E-5 - 1.17E-9[CO2], was superior to that of sample A, which followed the equation S([CO2]) = -2.34E-4 + 4.25E-9[CO2], as shown in the plotted graphs. Sample B exhibited a negative linear curve with a gentle slope, indicating a stable gas sensor behaviour
Digital Experiments in Learning the Concept of Gravitational Force in Classical Mechanics
No full textGravitational force is one of the fundamental forces that plays an important role in understanding the interaction between massive objects in the universe. However, in physics education, this concept is often difficult to understand concretely due to the limitations of real experiments. This research purpose to analyse the relationship between mass, distance, and gravitational force using the PhET Gravity Force Lab: Basics interactive simulation, as well as to prove its conformity with Newton's Law of Gravity. The research method used was a virtual experiment with a quantitative descriptive approach. Data was obtained by conducting three stages of experiments, namely observing gravitational force on objects of the same and different masses, the relationship between force and mass at a fixed distance, and the relationship between force and distance at a fixed mass. The results showed that gravitational force increased as the mass of objects increased and decreased significantly when the distance between objects increased. The conclusion of this study was that it proved the theory that gravitational force is directly proportional to the product of the masses of the two objects and inversely proportional to the square of the distance between them, in accordance with Newton's Law of Gravity, and showed that the forces were opposite but equal in magnitude, as described in Newton's Third Law
Intensity of Artificial Intelligence (AI) Use for Physics Learning in High Schools
No full textThis study investigates the intensity of Artificial Intelligence utilization in Physics education at a public high school in Manado City, Indonesia. The research aimed to understand the patterns and extent of AI integration, as well as the influencing factors, through a qualitative case study approach. The methodology involved in-depth interviews, classroom observations, and document analysis with six Physics teachers, students, and school management selected via purposive sampling. Data were analyzed using Miles and Huberman's model and thematic analysis. Key parameters examined included the forms of AI usage, intensity levels (low, medium, high), frequency, depth of utilization, and both supporting (teacher digital competence, school policy support, student enthusiasm) and hindering factors (lack of formal pedagogical training, infrastructure limitations, cultural resistance). Important findings indicate that AI adoption is predominantly at a medium level, primarily utilizing interactive simulations like PhET Interactive Simulation for abstract concept visualization, which significantly enhances student engagement and comprehension. However, comprehensive AI integration for adaptive, personalized learning remains rare. While school facilities are generally supportive, teachers' digital readiness varies, and AI usage frequency averages one to two times per week, the depth of its application often remains instrumental rather than transformational. In conclusion, AI adoption in Physics learning is still nascent, not yet fully optimizing AI's potential as an adaptive intelligent learning system, largely due to variations in teacher competency, school policies, and infrastructure readiness
Analytical Solution of Transverse Electric and Transverse Magnetic Mode Electromagnetic Wave Equations in Left-Handed Materials
No full textArtificial composite materials that focus on electromagnetic waves are known as metamaterials. Metamaterials are artificial materials engineered by human technology, possessing a geometric structure built from microscopic, engineerable materials. The goal is for the new material to be able to direct light, sound, and waves, making it useful. Metamaterials are known as left-handed materials (LHMs), but the concept of metamaterials is broader than LHM. The purpose of this research is to solve the transverse electric (TE) and transverse magnetic (TM) electromagnetic wave equations in left-handed materials (LHMs) using the Nikiforov-Uvarov approach and to analyze the results of the energy spectrum equation from the solution of the transverse electric (TE) and transverse magnetic (TM) electromagnetic wave equations in left-handed medium (LHM). This research was conducted using Matlab software. The material being studied is the positive-negative gradient profile in an LHM medium thru variations in dielectric permittivity and/or magnetic permeability. Energy and wave equations were obtained with their visualization
Citizen Science in Science-Physics Class: Building Contextual Climate Change Literacy
No full textThis study aims to examine the potential of integrating Citizen Science (CS) into science-physics learning as a pedagogical approach that can help shape a contextual understanding of climate change. This study used the Systematic Literature Review (SLR) method with reference to the PRISMA 2020 guidelines. The review process was carried out through several steps, namely problem identification, literature search in various databases, determination of inclusion and exclusion criteria, selection of articles, and thematic analysis of literature that met the criteria. Of the 35 articles identified, 15 were selected for further in-depth analysis. The literature review indicates that the integration of CS into science-physics learning can effectively improve cognitive aspects (scientific literacy, critical thinking skills, and creativity), affective (positive attitudes towards the environment, self-confidence, and relationships with the scientific community), and behavioral (awareness of pro-environmental actions). However, significant behavioral changes are still limited, and implementation faces obstacles such as limited time, lack of teacher competence, and integration with the official curriculum. The uniqueness of this study lies in mapping the contribution of Citizen Science in strengthening students' climate literacy comprehensively. Citizen Science serves not only as a science learning method but also as a medium of scientific and social participation that connects scientific knowledge, environmental awareness, and concrete action
TREN PENGGUNAAN SOFTWARE TRACKER DALAM FISIKA: SYSTEMATIC-REVIEW
No full textAbstrak. Penggunaan teknologi dalam pendidikan fisika terus berkembang, salah satunya adalah Software Tracker, perangkat lunak yang memungkinkan analisis gerak berbasis video dengan akurasi tinggi. Penelitian ini bertujuan untuk mengidentifikasi tren pemanfaatan Tracker Software dalam bidang fisika sebelum dan sesudah pandemi COVID-19, serta menganalisis distribusi topik penelitian yang menggunakan teknologi ini. Sebanyak 25 artikel dipilih melalui pencarian di database Scopus menggunakan kata kunci "Tracker Software" dan "Using Tracker", kemudian dianalisis untuk mengelompokkan fokus penelitian berdasarkan topik utama. Hasil analisis menunjukkan bahwa mayoritas penelitian menggunakan Tracker dalam pendidikan fisika (34.6%) dan fisika mekanika (26.9%), mendukung pembelajaran dan eksperimen untuk menganalisis gerak dan dinamika. Selain itu, aplikasi Tracker juga ditemukan pada fisika fluida (15.4%), fisika osilasi (11.5%), fisika optik dan magnetisme (7.7%), serta bidang biofisika dan astrofisika masing-masing sebesar 3.8%. Perbandingan sebelum dan sesudah pandemi menunjukkan peningkatan signifikan dalam jumlah penelitian, dari 43.5% sebelum pandemi (2016-2019) menjadi 56.5% setelah pandemi (2020-2023). Lonjakan ini mencerminkan respons terhadap kebutuhan pembelajaran jarak jauh selama pandemi, di mana Tracker menjadi solusi efektif untuk menggantikan praktikum laboratorium. Kesimpulannya, Tracker Software telah membuktikan fleksibilitasnya dalam mendukung berbagai penelitian dan pembelajaran fisika. Namun, terdapat peluang untuk memperluas penggunaannya pada bidang-bidang yang masih kurang tereksplorasi, seperti biofisika dan astrofisika, guna memaksimalkan potensi teknologi ini dalam pendidikan dan penelitian fisika.Kata kunci: Tracker, physics, sistematis-revie
PENGARUH PENALARAN MATEMATIS TERHADAP HASIL BELAJAR KOGNITIF DENGAN MODEL PEMBELAJARAN COOPERATIVE LEARNING TIPE STUDENT TEAMS ACHIEVEMENT DIVISIONS (STAD) SISWA KELAS IV SDN SENDANGGUWO 02 SEMARANG
No full textPendidikan memegang peranan penting untuk kemajuan dan perkembangan suatu bangsa karena dengan pendidikan manusia dapat memaksimalkan kemampuan dirinya. Cooperatif learning tipe STAD dapat meningkatkan prestasi belajar sekaligus meningkatkan rasa percaya diri siswa dan jiwa sosial sesama teman kelas serta mampu mengembangkan pikiran dalam berpikir dan memecahkan masalah. Dari hasil penelitan dapat disimpulkan model pembelajaran kooperatif tipe STAD memberikan pengaruh terhadap hasil belajar kognitif siswa kelas IV SDN Sendangguwo 02 Semarang, dengan perhitungan normalitas menunjukkan data hasil dari nilai rata- rata pada tahap awal sebesar 58,57 dan tahap akhir dengan menggunakan model kooperatif tipe STAD yaitu sebesar 72.62
PENGEMBANGAN MEDIA PEMBELAJARAN KOMIK MATERI SISTEM TATA SURYA BERBASIS PENDEKATAN SAINTIFIK UNTUK MENINGKATKAN KETERAMPILAN SOSIAL SISWA KELAS VI SEKOLAH DASAR
No full textLatar belakang penelitian ini adalah keterbatasan fasilitas, kurangnya pembelajaran yang efektif, kurang aktifnya peserta didik, pengondisian kelas, serta belum diterapkannya media pembelajaran berbasis pendekatan saintifik untuk meningkatkan keterampilan sosial. Tujuan penelitian ini yaitu mengetahui tahapan pengembangan, kevalidan, kelayakan, keefektifan, dan kepraktisan pengembangan media pembelajaran komik sistem tata surya berbasis pendekatan saintifik untuk meningkatkan keterampilan sosial siswa kelas VI Sekolah Dasar. Jenis penelitian ini adalah Reseacrh and Development yang digunakan untuk menghasilkan produk tertentu dan menguji keefektifan produk tersebut. Model pengembangan yang digunakan penelitian ini yaitu ADDIE (Analysis, Design, Development, Implementation, Evaluation). Berdasarkan hasil uji kevalidan ahli media diperoleh presentase sebesar 98,3% dan ahli materi diperoleh presentase 96,7%. Hasil uji keefektifan diperoleh dari nilai pretest siswa menunjukkan nilai rata-rata 55,7 sedangkan nilai posttest rata-rata 82,6, analisis menggunakan Uji-T Paired Samples Test menggunakan IBM SPSS 25 diperoleh nilai sig. (2-tailed) 0,05 yaitu 0,000 0,05 sehingga H0 ditolak dan Ha diterima. Hasil analisis kepraktisan diperoleh dari respon guru sebesar 100% dan hasil persentase rerata respon siswa 87%. Berdasarkan hasil tersebut, dapat disimpulkan bahwa pengembangan media pembelajaran komik sistem tata surya berbasis pendekatan saintifik untuk meningkatkan keterampilan sosial siswa kelas VI Sekolah Dasar sangat valid, layak, efektif, dan praktis digunakan dalam pembelajaran
KEEFEKTIFAN MODEL PROBLEM BASED LEARNING BERBANTU WORDWALL TERHADAP SIKAP ILMIAH MATA PELAJARAN IPAS KELAS IV SD NEGERI TLOGOSARI WETAN 01
No full textPenelitian ini bertujuan untuk mengetahui keefektifan model Problem Based Learning (PBL) berbantu Wordwall terhadap sikap ilmiah siswa kelas IV pada mata pelajaran Ilmu Pengetahuan Alam dan Sosial (IPAS) di SD Negeri Tlogosari Wetan 01. Jenis penelitian yang digunakan adalah kuantitatif dengan pendekatan eksperimen semu menggunakan desain Single Group Interrupted Time-Series. Instrumen yang digunakan berupa angket, observasi, dan wawancara. Hasil uji t menunjukkan nilai t = -40.048 dengan sig. (2-tailed) = 0.000, yang berarti terdapat perbedaan signifikan antara sikap ilmiah sebelum dan sesudah perlakuan. Berdasarkan hasil tersebut, dapat disimpulkan bahwa model PBL berbantu Wordwall efektif terhadap sikap ilmiah siswa
Efektivitas Model Project Based Learning (PjBL) terhadap Hasil Belajar Materi Perkalian di Kelas II Sekolah Dasar
No full textPenelitian ini muncul sebagai respon terhadap kurangnya penggunaan model pembelajaran yang variatif dan kontekstual sehingga berdampak pada rendahnya pencapaian hasil belajar siswa. Fokus utama dalam penelitian diarahkan untuk mengidentifikasi dan mengungkapkan tingkat efektivitas model Project Based Learning dalam pembelajaran pada materi perkalian di kelas II sekolah dasar. Penelitian ini menggunakan metode kuantitatif dengan desain pre-experimental one group pretest – posttest. Subjekterdiri dari 22 siswa kelas IIA SD Negeri Gayamsari 01 Kota Semarang tahun ajaran 2024/2025. Data penelitian ini dianalisis dengan bantuan IBM SPSS 30. Hasil uji normalitas diperoleh signifikansi pretest 0.05 dan signifikansi posttest 0.05 sehingga data berdistribusi normal. Berdasarkan analisis uji paired sample t-test dengan tingkat signifikansi yaitu 5% diperoleh hasil thitung sebesar 8.333 sedangkan ttabel sebesar 2.086, maka thitung ttabel sehingga H0 ditolak dan Ha diterima. Selain itu, uji N-Gain menunjukkan nilai 64% yang dikategorikan dalam tingkat efektivitas sedang. Berdasarkan hasil tersebut, dapat disimpulkan bahwa model Project Based Learning cukup efektif dalam meningkatkan hasil belajar siswa pada materi perkalian di kelas II sekolah dasar