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Kappa Journal
Published by Universitas Hamzanwadi
ISSN : -     EISSN : 25492950     DOI : -
Core Subject : Science, Education,
Astronomy Physics Other
Kappa Journal (e-ISSN 2549-2950) mempublikasikan artikel hasil-hasil penelitian fisika, inovasi pembelajaran fisika, dan pemikiran-pemikiran kritis tentang fisika maupun pendidikan fisika. Kappa Journal diterbitkan oleh Universitas Hamzanwadi dua kali setahun yakni setiap bulan Juni dan Desember.
Arjuna Subject : -
Articles 419 Documents
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Separation of Variables Method in Solving Partial Differential Equations and Investigating the Relationship between Gravitational Field Tensor and Energy-Momentum Tensor in Einstein's Theory of Gravity Siagian, Ruben Cornelius; Alfaris, Lulut; Nurahman, Arip; Muhammad, Aldi Cahya; Nyuswantoro, Ukta Indra; Nasution, Budiman
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.20921

Abstract

This research delves into the study of partial differential equations (PDEs) and gravitational fields in spacetime. It focuses on solving PDEs using the Separation of Variables method and explores the relationship between the gravitational field tensor and the energy-momentum tensor, leading to the final equation for the gravitational field tensor. The research also investigates Einstein's theory of gravity and the energy-momentum tensor integral, providing the general solution for the gravitational potential and its implications. Additionally, the mean integration of the gravitational wave tensor is analyzed, yielding an expression for the tensor strain of gravitational waves over an infinitely long period. The components of the gravitational wave tensor and their effect on gravitational sources are examined. Furthermore, the propagation of electromagnetic fields in spacetime is studied using the Retarded Green's Function. The primary objectives of this research are to understand and explore mathematical techniques for solving PDEs and analyzing gravitational fields and their interactions in spacetime. The integration of multiple theoretical concepts related to PDEs, gravitational fields, and electromagnetic fields enhances our understanding of fundamental physics principles. This contributes to the advancement of theoretical physics and opens avenues for potential practical applications, such as gravitational wave detection and electromagnetic field propagation in complex media. In conclusion, this research provides valuable insights into fundamental physics principles and fosters a deeper understanding of their interconnections and implications
Identifikasi Pencemaran Air Lindi pada Kawasan Asrama di Kampus Universitas Udayana dengan Menggunakan Metode Geolistrik Konfigurasi Wenner Pratama, Maulana Rizki; Putra, I Ketut; Nurmalasari, Ni Putu Yuni; Sumadiyasa, Made; Sandi, I Nengah; Baskoro, Winardi Tjahyo
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.20842

Abstract

Dormitory land in the Udayana University area is often used as a place to dispose of garbage. Basically leachate contains metal content such as zinc (Zn) and mercury (Hg) which seep into the soil. Identification to determine the presence of leachate at a certain depth, can use the Wenner Configuration Geoelectrical Method. From the data obtained then processed using Res2dinv it was found that the leachate content in the Udayana University Dormitory Area is found at a distance of 33m, 43m, 63m, 83m, from the pile of garbage and a depth of 1.25 - 3.75m below the surface of the pile of garbage for coordinates 115.165240 BT, 8.798640 LS to 115.164955 BT, 8.799100 LS and a distance of 62m, 72m, 82m, from the garbage pile and a depth of 1.25 – 6.38m below the surface of the garbage pile at coordinates 115.165091 BT, 8.798557 LS to 115.164730 BT, 8.799021 LS.
Dinamika Sebaran Suhu Udara Menggunakan Citra Landsat 8 di Wilayah Denpasar Periode 2018-2021 Pertiwi, Hanik Wahyu; Yuliara, I Made; Irmawan, Decky
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.19128

Abstract

Research has been conducted on the Dynamics of Air Temperature Distribution Using Landsat 8 Imagery for the 2018-2021 Period, in the Denpasar area study area with a location point at the Sanglah Geophysical Station. The methods used in this study were Normalized Difference Vegetation Index (NDVI) and Land Surface Temperature (LST), while the analysis used was correlation and validation. The results of the NDVI value study explained that from 2018 to 2021 the NDVI density value was getting higher so that the resulting temperature was low. Meanwhile, the determination of ESG on the dynamics of average air temperature explains that the average air temperature value in each year does not always rise linearly, in 2018 the highest average air temperature distribution was at 29.56 °C, in 2019 it was 35.56 °C, in 2020 it was 25.62 ° C and 2021 it was 30.72 ° C. In testing and analysis, a correlation relationship was obtained between Landsat 8 imagery (band 10 and band 11) and BMKG, which showed that the temperature between Landsat 8 imagery and BMKG was correlated in the same direction. The relationship between the distribution of average air temperatures with the implementation of PPKM in the Denpasar area has nothing to do with it as previously thought. Due to the increase in temperature, landsat 8 and BMKG images are only affected by the atmosphere
Pengaruh Pemanfaatan Media Digital Dalam Mengatasi Kejenuhan Belajar Siswa Putra, Lovandri Dwanda; Thasia, Anis; Istinawaro, Nisa; Ulayya, Nida
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.20961

Abstract

Abstrak: Telah dilakukan penelitian tentang pemanfaatan media digital dalam mengatasi kejenuhan belajar siswa SD Negeri Wirosaban. Analisis ini bertujuan untuk mengetahui bagaimana pemanfaatan media digital dengan permasalahan kejenuhan yang dialami oleh siswa sekolah dasar. Metode kualitatif dan deskriptif adalah metode yang digunakan untuk penulisan artikel ini. Dari hasil penelitian didapatkan bahwa teknologi digital yang sering digunakan dalam proses belajar di SD Negeri Wirosaban yaitu proyektor, pen tab, serta media digitalnya berupa whatsapp, video youtube, word dan power pont. Tidak ada perbedaan sikap dalam belajar dengan metode ceramah ataupun dengan belajar menggunakan media digital dan metode ceramah belum tentu menjadikan siswa jenuh. Metode dan media yang diberikan oleh guru menyesuaikan dengan kebutuhan siswa, sehingga guru di SD tersebut menggunakan metode double standar dalam menyampaikan bahan ajar. Kebutuhan siswa di SD Negeri Wirosaban berbeda-beda dikarenakan siswa di SD tersebut merupakan siswa campuran yang 40% anak merupakan ABK.   
Penerapan Model Pembelajaran Problem Base Learning (PBL) dalam Pembelajaran Fisika Ismatulloh, Kholida; Ropikoh, Ropikoh; Marfuatun, Marfuatun
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.20934

Abstract

A study entitled the application of the PBL (Problem Base Learning) learning model to the physics learning outcomes of class VIII students at SMPN 3 Selong has been carried out. This study aims to see whether there is an influence of the PBL (Problem Base Learning) learning model on student learning outcomes in the subject of style and motion in class VIII SMPN 3 Selong. This type of research is quantitative by measuring learning outcomes from the post-test results given at the end of learning. The population used in this study was class VIII, totaling 100 people. The total sampling technique took only two classes, namely class VIII A as the experimental class and class VIII B as the control class. The research hypothesis was carried out using the t test with the results obtained ?ℎ????? = 7.023 > ?????? = 1.763 ?0 rejected ?1 accepted using a significant level of 5%.
Peramalan Titik Akuifer Di Desa Manistutu Kecamatan Melaya Kabupaten Jembrana Dengan Metode Geolistrik Sukarasa, Ketut; Suardana, Putu
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.21435

Abstract

Research has been carried out which aims to determine the depth of the aquifer point in Manistutu Village, Melaya District, Jembrana Regency. The work process of this research is the first to collect data directly using a geoelectric device with a Wenner configuration. Electric current is passed below the earth's surface through current electrodes that are installed above the earth's surface. The data that has been collected is then processed using Res2Div version 3.53g for 2D. The result of the software is a 2D image which is a direct lateral view of the subsurface structure. Of the two identified paths, namely line 1 at initial coordinates 8°31'92.33"S, 114°55'94.59"E to final coordinates 8°31'78.07"S, 114°56'05.21"E, the lowest resistivity value is obtained 121 Ohm m with a depth of 13 m and 20 – 32 m which is suspected as an aquifer point. On track 2 with initial coordinates 8°31'55.56"S, 114°56'08.31"E to final coordinates 8°31'55.56"S 114°56'61.11"E the resistivity value is 2.56 Ohm m to 8952 Ohm m. The layer that is suspected as an aquifer point is at a depth of 18.5 m, because of its low resistivity value.
Dye-Sensitized Solar Cells(DSSC) Use Natural Organic Sulphur Cosmos Leaves Darmawan, Muhammad Iman; Nuzuluddin, Muh.
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.20932

Abstract

Energy is a basic need in everyday life, so the need for energy in the world continues to grow. Energy is usually produced from fossils whose existence is diminishing and cannot be renewed. Therefore many experts are looking for ways to make and create some renewable energy, and Dye-sensitized solar cell (DSSC) is one of them. In this study aimed to determine the characterization of the electrical properties of the Dye Sulphur Cosmos (Kenikir Leaf) material extract. The study conducted absorbance tests using a UV Visible 1601 PC Spectrophotometer and current and voltage tests (I-V) using Cathay. These results indicate that some natural dyes from the extraction of natural organic matter have absorbance spectra in the range of 300-800 nm, which have the potential as DSSCs.
Pengembangan Perangkat Pembelajaran Model Advance Organizer Untuk Meningkatkan Hasil Belajar Fisika Peserta Didik Putra, I Ketut Eka; Harjono, Ahmad; Hikmawati, Hikmawati; Gunada, I Wayan
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.18924

Abstract

This development research aims to produce a product in the form of a learning tool for the Advance Organizer model that is feasible, practical and effective to use to improve students' physics learning outcomes. The products produced in this development research include syllabus, lesson plans, worksheets and test instruments. The type of research conducted is Research and Development (R&D) with a 4D model design consisting of 4 stages, namely Define, Design, Develop and Disseminate. Data collection techniques used validation sheets, response questionnaire based and test sheets. The validation sheet is used to determine the validity of the learning device seen from the validation results by the validator. Response questionnaire sheets are used to determine the practicality of learning devices. The test sheet is used to determine the effectiveness of learning devices based on the pretest and posttest scores of students. The results obtained through data collection were 88.4% and 95.7% in the valid and reliable categories, 91.3% in the very practical category and 0.71 in the fairly effective category. Based on the data obtained, it can be concluded that the learning tools developed are valid, practical and effective to be used to improve students' physics learning outcomes.
Pengaruh Slice Thickness terhadap Signal to Noise Ratio (SNR) dari Hasil Penyinaran CT Scan di RSUP Prof. Dr. I.G.N.G Ngoerah Kusumaningsih, Lusi Putu Russita; Suryatika, I Bagus Made; Trisnawati, Ni Luh Putu; Irhas, Rozi
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.7675

Abstract

A research has been carried out on the effect of slice thickness on SNR values from the results of CT Scan irradiation at Prof. Dr. I.G.N.G Ngoerah Hospital.  Variations in the thickness of the slices used are 1 mm, 3 mm, 5 mm, and 7 mm.  The tube voltage, tube current, and FOV used are constant, namely 120 kV, 200 mA, and 380 mm.  SNR value analysis was calculated using the average object value and SD background for each material.  Based on the results of a simple linear regression test, the thickness of the slices obtained has an effect of 99.9% on the SNR value.  These results indicate that the greater the thickness of the slice used, so the SNR value will increasesas the SNR value increases, it will improve image quality.
Efek STEM Dalam Pembelajaran Sains Terhadap Keterampilan Abad 21: Meta Analisis Novianti, Baiq Aryani; Lasmawan, I Wayan; Suharta, I Gusti Putu
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.18630

Abstract

21st-century skills are one of the skills that students must master. Curriculum 2013 which trains and develops 21st-century skills can be implemented by applying STEM in science learning. The method of this study is to analyze journal articles obtained through online journals. This study analyzed 20 journals published from 2016 to 2022 and calculated the effect size which included 16 national journals and 4 international journals. The results of the data analysis show that at the elementary, junior high, and senior high school levels, the impact of STEM on science learning at all levels of education is relatively high. The implementation of STEM in Science Learning has an impact on 21st-century skills such as critical thinking, creative thinking, communication, and collaboration

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