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Analysis Of Bias And Purity Indices In Packaged Cooking Oil And Bulk Cooking Oil Using The Diffraction Grid Method Syifa Fauzia; Luma Alfiasti Sulton; Ayu Aulia Asyhari; Ahmad Suryadi; Fuji Hernawati Kusumah
Jurnal Multidisiplin Indonesia Vol. 1 No. 3 (2023): September : Jurnal Multidisiplin Indonesia
Publisher : PT. ALHAFI BERKAH INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62007/joumi.v1i3.185

Abstract

Cooking oil is a fundamental daily necessity, and both packaged and bulk oils are susceptible to structural changes and contamination that can influence the bias index. This research aims to analyze the purity of packaged and bulk cooking oil, investigate the relationship between the bias index and usage time, and identify factors influencing the bias index in both types of cooking oil using the diffraction grid method. The study revealed bias indices produced from packaged cooking oil before usage, after 10 minutes of usage, and after 15 minutes of usage, namely 5.08×108; 5.22×108 and 3.94×108, respectively. The bias indices from bulk cooking oil under the same conditions were 4.68×108; 3.61×108 and 3.37×108, respectively. Based on the research results, it is evident that packaged cooking oil exhibits a higher level of purity compared to bulk cooking oil. The relationship between the bias index and usage time is inversely proportional, indicating that the longer the cooking oil is used, the smaller the Refractive Index value becomes.
Analysis of Organa Pipe Resonance Frequency Utilizing Phyphox Application and Auditory Perception in Kundt’s Tube Ledya Safira; Thasyara Safna; Anisa Pangestuti; Maya Shinta Saqila; Shinta Dewi; Ahmad Suryadi; Fuji Hernawati Kusumah
Jurnal Multidisiplin Indonesia Vol. 1 No. 3 (2023): September : Jurnal Multidisiplin Indonesia
Publisher : PT. ALHAFI BERKAH INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62007/joumi.v1i3.192

Abstract

The use of the Phyphox application proves to be highly beneficial in attaining precise experimental data by leveraging existing technology. This application is freely downloadable for both Android and iOS platforms. The research aims to compare resonance frequency values using human auditory perception and the Phyphox application. The study utilizes a transparent glass organ pipe with a length of 100 cm, conducting three repetitions for each obtained pitch. The selected menu on the Phyphox application is 'audio amplitude,' which displays the maximum sound intensity through numerical dB readings and a graphical representation. Phyphox serves as an auxiliary tool for determining the maximum noise value in open-closed organ pipes to identify the resonance frequency. It is crucial to use the Phyphox application in a noise-free environment, as even the slightest noise can influence the displayed maximum noise values on the application. The results indicate that the relative error value in the Phyphox application is smaller compared to human auditory perception, with 0.25% < 0.27%. Therefore, it can be concluded that the values obtained through the Phyphox application are more accurate with a minimal margin of error.
Comparative Analysis of Diffraction Grating on a Hair and a Broom as an Alternative Experiment in School Asa Manafia Mumtaza; Farah Fairuz Khairun Nisa; Ahmad Suryadi; Siti Humairoh; Fuji Hernawati Kusumah
Jurnal Multidisiplin Indonesia Vol. 1 No. 3 (2023): September : Jurnal Multidisiplin Indonesia
Publisher : PT. ALHAFI BERKAH INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62007/joumi.v1i3.207

Abstract

Laboratory experiments in schools often face challenges, including inadequate teacher training, limited equipment and materials, and dense teaching content. This research proposes an alternative approach by using readily available materials in the school environment. In the diffraction experiment, banana leaf stems were replaced by coconut fiber and a strand of hair as experimental media. Fraunhofer diffraction, the bending of waves behind a narrow slit, became the focus of this experiment. The primary objectives were to understand the process of diffraction grating, measure the differences in spreading between a strand of hair and coconut fiber, and analyze the variables involved. The experimental data showed that a strand of hair had the farthest distance to the central bright spot with an average of 1.23 meters. While successfully creating a diffraction grating pattern using makeshift tools and materials, the difficulty in measuring the distance between bright spots highlighted a critical note for future improvements. In conclusion, this experiment provides new insights into light diffraction using resources available in the school environment. However, further research expansion and improved measurement accuracy should be the focus to support the development of more effective laboratory methods in overcoming facility limitations in the school environment.
Simple Periscope To Observe Light Reflecting Off A Flat Mirror Ziyanti Putri Setia Gandi; Nur Kholisah; Mohammad Danial; Ahmad Suryadi; Fuji Hernawati Kusumah
Jurnal Multidisiplin Indonesia Vol. 1 No. 3 (2023): September : Jurnal Multidisiplin Indonesia
Publisher : PT. ALHAFI BERKAH INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62007/joumi.v1i3.212

Abstract

This simple periscope is made as a tool to help students understand the concept of reflection from two flat mirrors, observe the process of forming an image of an object, and observe the process of reflecting light using a laser as a light source on simple periscope props. The first observation by using the periscope directly, the observation results obtained are that it produces right-left images of objects that are not reversed, the images also look upright and virtual. In addition, the size of the image is also the same as the original object. Based on the second observation, specifically observing the process of reflecting light with a laser, where in this second observation there were two reflections of light. The laser light fired at the first flat mirror is reflected straight to the second mirror, then reflected back straight from the second mirror to the outside at the same angle of 45°.
Proving the Resonance of DO, RE, MI, FA, SOL, LA, SI, High DO Tones by Comparing Frequency of Sound Produced by Wine Glasses Ramadhani, Hanifah Asma; Syamra, Fifi Mufida; Melati, Bunga Chinta; Pasaribu, Ibrahim Farisya; Kusumah, Fuji Hernawati
KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Vol 9 No 02 (2024): KONSTAN (Jurnal Fisika dan Pendidikan Fisika)
Publisher : Universitas Islam Negeri (UIN) Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/konstan.v9i02.414

Abstract

Due to the lack of standard laboratory facilities in many schools in Indonesia, the researcher created a simple musical instrument based on the concept of sound physics. The research was to prove the phenomenon of ‘resonance’ with the frequency comparison of the sound from ‘wine glasses’. Eight identical glasses filled with water at different heights to produce the do, re, mi, fa, sol, la, si, and do. The results showed the longer the air column, the higher the frequency of the sound produced. The sound produced by the glasses filled with less water was louder than the glasses filled with more water. This happened because of the resonance between the sound waves produced by the glasses and the sound waves propagating in the tube. Thus, it was following the theory. It could be used in the laboratory. As suggested, the researcher used tall and straight wine glasses to make it easier.
Pengaruh PjBL-STEM terhadap Peningkatan Keterampilan Berpikir Kritis pada Materi Energi Terbarukan dalam Mendukung Pendidikan yang Berkualitas Yusra, Rabina Amara; Kusumah, Fuji Hernawati; Suryadi, Ahmad
Jurnal Pendidikan Matematika dan Sains Vol. 13 No. Special_issue (2025): Integrasi Pendidikan Matematika dan Sains dalam Mendukung Sustaina
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpms.v13iSpecial_issue.86537

Abstract

Keterampilan berpikir kritis di Indonesia masih tergolong rendah, terutama dalam pembelajaran fisika. Model PjBL-STEM dipandang sebagai salah satu alternatif solusi yang dapat mendorong peningkatan keterampilan tersebut. Penelitian ini bertujuan untuk mengetahui pengaruh model PjBL-STEM terhadap peningkatan keterampilan berpikir kritis siswa. Metode yang digunakan adalah quasi eksperimen dengan desain penelitian nonequivalent control group design . Sampel terdiri dari 32 siswa kelas X yang dipilih dengan menggunakan teknik purposive sampling , terdiri dari 18 siswa sebagai kelompok eksperimen (model PjBL-STEM) dan 14 siswa sebagai kelompok kontrol (model PBL). Hasil analisis pada kelas eksperimen menunjukkan peningkatan keterampilan berpikir kritis yang signifikan secara statistik p = 0,002 dengan effect size Cohen's d = 1,46 (efek sangat besar) dan skor N-Gain 0,36 (kategori sedang). Pada perbandingan kelompok eksperimen dengan kelompok kontrol tidak menunjukkan perbedaan yang signifikan secara statistik p = 0,362, namun memiliki effect size Cohen's d = 0,33 yang berarti ada efek kecil. Hasil penelitian menunjukkan terdapat pengaruh model PjBL-STEM terhadap peningkatan keterampilan berpikir kritis siswa serta mendukung pencapaian tujuan 4 SDGs yaitu pendidikan yang berkualitas. Penelitian selanjutnya disarankan menggunakan sampel lebih besar untuk menguji pengaruh PjBL-STEM dengan model pembelajaran lain.
The Effect of Variation in Number of Blades on Current and Voltage in Simple Waterwheel Props Hakim, Marsa Raihanida; Setia Gandi, Ziyanti Putri; Zein, Nihayatu; Rahmah, Nurul Esa; Kusumah, Fuji Hernawati
KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Vol 10 No 01 (2025): KONSTAN (Jurnal Fisika dan Pendidikan Fisika)
Publisher : Universitas Islam Negeri (UIN) Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/konstan.v10i01.705

Abstract

The world's dependence on fossil fuels has caused energy crises and environmental pollution, making renewable energy a crucial solution to develop. This study aims to analyse the effect of blade number variation on current and voltage in a simple waterwheel system. A quantitative correlational design was used to measure the relationship between the number of blades and the resulting electric current and voltage. The experiment used an educational water turbine generator kit, a digital multimeter, a stopwatch, a beaker, and supporting tools. The procedure involved three stages: assembling the turbine kit, measuring current and voltage across four blade variations, and calculating water flow using a beaker and stopwatch. Blade variations tested were 8, 6, 4, and 2, with each configuration measured four times for accuracy. The results showed a direct correlation between the number of blades and the generated current and voltage. Reducing the blade count from 8 to 2 resulted in a 19.05% decrease in current (from 13.02 A to 10.54 A) and a 52.63% drop in voltage (from 0.38 V to 0.18 V). A key challenge during the experiment was the fluctuating water flow rate, which made it difficult to maintain a perfectly constant flow. Therefore, the flow rate was approximated using the discharge formula and considered relatively stable. This experiment confirms that increasing the number of blades enhances energy conversion efficiency. In conclusion, mechanical energy directly influences electrical output, with blade number being a key factor. Future studies should explore variations in blade design, materials, and water flow control for optimal micro-hydro efficiency.
REVOLUSI PEMBELAJARAN PARADIGMA BARU: UPAYA MENINGKATKAN KOMPETENSI GURU-GURU PAUD DALAM IMPLEMENTASI KURIKULUM MERDEKA (IKM) DI KABUPATEN BOGOR Hasanah, Lathipah; Kusumah, Fuji Hernawati; Putri, Sepiana Permana
Transformasi dan Inovasi : Jurnal Pengabdian Masyarakat Vol 5 No 2 (2025): Volume 5, Nomor 2, Juli 2025
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpm.v5n2.p65-76

Abstract

Curriculum is a key component in the development of education and the learning process in schools. The curriculum is designed to facilitate and improve the quality of learning at every level of education. However, several issues have arisen from the implementation of the Merdeka (Independent) Curriculum, including teachers not yet understanding the curriculum, which is now increasingly being implemented by early childhood education institutions (PAUD), never having received training or socialization about its implementation, and difficulties in achieving learning objectives in the classroom. The purpose of this community service activity is to enhance the competencies of PAUD teachers to enable them to develop teaching modules that align with students' needs and potential, optimize play activities as a learning method, and apply deeper assessments. The method used is action research, which consists of several steps: planning, observing, acting, and reflecting. Based on the results of the teacher satisfaction questionnaire, it can be seen that the five core materials provided (a) new learning paradigms, (b) the preparation of unit-level curricula, (c) learning outcomes, (d) assessments and learning, and (e) projects to strengthen the Pancasila student profile were well understood. Meanwhile, the results of pre-tests and post-tests also showed a significant increase in knowledge competencies, with participants scoring 25% in the pre-test and 77% in the post-test.Thus, this shows that the community service activity for implementing the Merdeka Curriculum in Bogor Regency significantly improved the competencies of PAUD teachers.
PERBANDINGAN KONDUKTIVITAS TERMAL LOGAM BESI DAN KUNINGAN MENGGUNAKAN METODE EKSPERIMEN SEDERHANA Falakh, Athfatullaila Elyo; Widana, Sausan Nada; Kusumah, Fuji Hernawati
OMEGA : JURNAL ILMU PENDIDIKAN DAN SAINS FISIKA Vol 4 No 1 (2025): Omega: Jurnal Pendidikan dan Sains Fisika
Publisher : Program Studi Pendidikan Fisika Unpacti Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47650/omega.v4i1.2028

Abstract

Penelitian ini bertujuan untuk membandingkan konduktivitas termal dua jenis logam, yaitu kuningan dan besi melalui eksperimen sederhana berbasis pengukuran suhu. Masing-masing logam memiliki bentuk silinder dengan diameter 0,5 cm dengan panjangnya 29,8 cm. Percobaan dilakukan secara bergantian pada masing-masing logam guna menjaga konsistensi hasil. Salah satu logam dipanaskan menggunakan lilin dan 2 termometer digantungkan pada jarak yang berbeda yaitu 12 cm dan 20 cm dihitung dari ujung logam yang dipanaskan. Hasil menunjukan bahwa kuningan meningkat lebih cepat dibandingkan besi. Hasil percobaan ini menunjukan bahwa kuningan memiliki konduktivitas termal lebih tinggi dibanding besi. Penelitian ini memberikan pemahaman dasar mengenai perbedaan kemampuan penghantaran panas antar logam.
A Comparison of The Effectiveness of Hollow Prism and Parallel Plans The Measurement of Fludia's Refresh Index: Case Study On Aquades and Alcohol Rizqi Fajar Shidiq; Indira Gustaviana Nugroho; Irfan Daniel; Fuji Hernawati Kusumah; Rabina Amara Yusra; Ahmad Suryadi
Jurnal Multidisiplin Indonesia Vol. 1 No. 2 (2023): Juni : Jurnal Multidisiplin Indonesia
Publisher : PT. ALHAFI BERKAH INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62007/joumi.v1i2.225

Abstract

A refractometer is a tool used to measure the refractive index of fluids. However, there are several issues, including the considerable cost involved and the fact that not all school laboratories have this tool. Therefore, we conducted a study to compare the accuracy of refractive index values using a hollow prism and a plan parallel prism. Among the various methods available today, refraction is a relatively simple and cost-effective method for determining the refractive index of fluids. In measuring the refractive index of fluids, the use of containers or vessels is essential. Following a review of existing studies, two commonly used types of vessels were identified: the cube-shaped vessel (plan parallel) and the hollow prism. This research aims to compare the refractive index results obtained using a hollow prism and a plan parallel prism, using two samples—namely, distilled water (aquades) and alcohol—which have predetermined values in the refractive index table. The results indicate that the refractive index value for aquades using a plan parallel prism is 0.97, while with a hollow prism, it is 1.33, where the true refractive index value is 1.33. For alcohol, the results using a plan parallel prism are 0.91, and with a hollow prism, it is 1.35, where the true refractive index value is 1.36. The conclusion drawn is that using a hollow prism yields refractive index values for both aquades and alcohol that closely approximate the true refractive index, compared to the use of a plan parallel prism.