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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.
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Articles 419 Documents
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Efektivitas Jumlah Lubang Pada Tabung Pembakaran Terhadap Performa Kompor Biomassa Rahayu, Susi; Ridwansyah, Habib; Kurniawidi, Dian Wijaya; Handayana, I G N Yudi; Alaa`, Siti; Budianto, Arif
Kappa Journal Vol 8 No 1 (2024): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i1.25335

Abstract

Global energy requirements encourage innovations in developing environmentally friendly alternative energy sources by transforming biomass waste into biopellets. The use of biopellets as fuel was followed by the development of biomass stoves for households. Developing biomass stove technology design is essential, so this research aims to design a biomass stove with good performance for use as a household stove. Stove performance was identified by reviewing the biomass stove's fuel consumption and thermal efficiency relative to the number of combustion holes. The biomass stove fabrication results had been successfully created based on a stove design using galvanized plate material. The design focused on three layers of tubes, including the stove frame, the air supply control, and the combustion tube. The number of holes in the combustion tube affected fuel consumption and the thermal effectiveness of the stove. The lowest fuel consumption on a furnace with six combustion holes was 2,306 kg/hour. Meanwhile, the optimal thermal efficiency for burning 18 holes was 16.17%. However, this thermal efficiency value needs to meet the SNI 7926: 2013 standard. The location and number of combustion holes in the combustion tube could influence the performance of the biomass stove. Therefore, it is important to modify biomass stoves to fulfill SNI standards.
Determining Seismicity Using the Likelihood Method in Sumbawa Island Region Period 1972-2022 Celline; Baskoro, Winardi Tjahyo; Saputra Rahman, Muhammad Soekarno
Kappa Journal Vol 8 No 1 (2024): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i1.25409

Abstract

Research has been carried out regarding the determination of seismicity in the Sumbawa Island region for the period 1972-2022 with observation area boundaries of 116.5° – 119.3° East Longitude and 10° – 8° South Latitude. The research was carried out at the Center for Meteorology, Climatology and Geophysics Region III Denpasar using the likelihood method which was adjusted to the seismicity level M ≥ 3 and depth ≤ 30 km. Determining the b-value was calculated using the likelihood method and obtained b-values for the 4 regions ranging from 0.6 – 0.7 and a-values ranging from 4.7 – 5.4. The return period for earthquakes ranges from 1.03 – 308.1 years. The results show that region 3 has the largest b-value, namely 0.796. The region that has the largest a-value is region 1, namely 5.405. The shortest earthquake return period is region 1 with 1.049 years and the longest is region 3 with 314.6 years.
Pengaruh Dopping Mn Pada Semikonduktor AZO Terhadap Laju Fotodegradasi Pewarna Tekstil Congo Red Menggunakan Radiasi UV A Krisandi, Aprilion; Heru Harsono; Nurfina Yudasari
Kappa Journal Vol 8 No 2 (2024): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i2.25497

Abstract

Pengujian fotodegradasi pewarna tekstil Congo Red telah berhasil dilakukan menggunakan agen AZO dan AZOMn. Material tersebut disintesis terlebih dahulu disintesis menggunakan metode kopresipitasi dengan formulasi Zn0,95-xAl0,05Mnx dengan nilai x sebesar 0 dan 0,01. Material hasil modifikasi tersebut diuji menggunakan spektrometer reflektan (DRS) untuk mendapatkan nilai relektansi yang digunakan dalam proses perhitungan nilai energi gap dengan bantuan persamaan Kulbelka Munk. AZO dengan konsentrasi Al 5% wt dan Mn 0% wt memiliki energi gap sebesar 3,290 eV dan AZOMn dengan konsentrasi Al 5% wt dan Mn 0,1% wt memiliki energi gap 3,279 eV. Aktivitas fotokatalis AZO dan AZOMn telah diuji menggunakan sumber radiasi sinar UV A dengan puncak serapan Congo Red 480 nm selama 2 jam. Dari hasil karakterisasi, kedua agen fotokatalis ini mampu mendegradasi limbah pewarna tekstil Congo Red dengan persentase AZO dan AZOMn beturut – turut 97,9% dan 67,6%. Laju fotodegradasi juga menampilkan pola yang sama yaitu material AZO memiliki kelajuan fotodegradasi sebesar 0,03504/menit sedangkan material AZOMn memiliki kelajuan fotodegradasi sebesar 0,00759/menit. Nilai ini menunjukkan bahwa AZO memiliki kemampuan fotodegradasi lebih baik dibandingkan dengan AZOMn dalam limbah pewarna tekstil Congo Red
Penentuan Nilai Computed Tomography Dose Index (CTDIvol) dan Dose Length Product (DLP) Pesawat CT-Scan kepala pada kasus Stroke Non Hemoragik (SNH): Determination of Computed Tomography Dose Index (CTDIvol) and Dose Length Product (DLP) values of head CT-Scan aircraft in cases of Non Hemorrhagic Stroke (SNH) Nabilla Fatimah; Sutapa, Gusti Ngurah; Sudarsana, Wayan Balik; Ratini, Ni Nyoman; Suardana, Putu; Putra, I Ketut
Kappa Journal Vol 8 No 2 (2024): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i2.25599

Abstract

A study was conducted on the determination of Computed Tomography Dose Index (CTDIvol) and Dose Length Product (DLP) values of head CT-Scan aircraft in cases of Non Hemorrhagic Stroke (SNH). The study was conducted at the Radiology Installation of Prof.Dr. I.G.N.G. Ngoerah Denpasar Hospital using secondary data from head CT-Scan examination results consisting of age, gender, kV, mAs, slice thickness, rotation time, CTDIvol and DLP in patients aged 40-80 years. This study aims to determine the local DRL value at Prof.Dr. I.G.N.G. Ngoerah Denpasar Hospital does not exceed the national DRL value. It was found that in female patients the CTDIvol value in male patients was 54.9 mGy and in female patients it was 53.11 mGy. While the DLP value of male patients was 1143 mGy.cm and in female patients it was 1118 mGy.cm. Based on the results of the analysis with a one-way t-test, it can be seen that the DRL values of CTDIvol and DLP in both male and female patients do not exceed the standards set by BAPETEN No.1211/K/V/2021, so it can be said that the CT-Scan at the Radiology Installation of Prof.Dr. I.G.N.G. Ngoerah Denpasar Hospital is still suitable for use in examinations, especially head examinations.
Expert Validation of Ethnoscience-Based Teaching Materials to Develop Student Competence in Critical Thinking and Caring Attitudes Hikmawati, Hikmawati; Suastra, I Wayan; Suma, Ketut; Sudiatmika, A A Istri Agung Rai
Kappa Journal Vol 8 No 1 (2024): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i1.25656

Abstract

The aim of this research is to describe the results of expert validation of ethnoscience-based teaching materials to develop student competence in critical thinking and caring attitudes. Expert validation in this research is part of the development of ethnoscience-based teaching materials to develop student competence in critical thinking and caring attitudes using the 4D model. This model includes stages, namely Define, Design, Develop, Disseminate so that it will produce ethnoscience-based teaching materials that are valid, practical and effective in developing students' competence in critical thinking and caring attitudes. Expert validation is included in the Develop stage. Validation of ethnoscience-based teaching materials to develop students' competence in critical thinking and caring attitudes was carried out by 3 experts, namely material experts, media experts and language experts. The research results show that the assessment from material experts is 96.7, media experts are 90.5, and language experts are 100. Thus, the average value of expert validation assessments is 95.7, including the Very Valid criteria. The product, in the form of ethnoscience-based teaching materials to develop students' competence in critical thinking and caring attitudes, was revised based on input from validators. The results of product revisions before and after validation are divided into 5 things, namely: 1) Adding indicators and numbering to Basic Competencies; 2) Improvements to tables that were previously scanned from source or reference books were revised by creating tables manually. The table has also been assigned a sequential number; 3) Addition of photos and videos related to ethnoscience; 4) Ethnoscience-based investigative activities; 5) Changes in the appearance and form of the formative tests available at the end of each chapter.
Pengembangan Lembar Kerja Peserta Didik (LKPD) Berbasis PBL untuk Meningkatkan Hasil Belajar Fisika Ismatulloh, Kholida; Kholisho, Yosi Nur; Hr, Bq. Malika; Dwi Arianti, Baiq Desi
Kappa Journal Vol 8 No 1 (2024): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i1.25801

Abstract

This research aims to determine the effectiveness and response of students to the Student Worksheet (LKPD) that was developed. The type of research is research and development with a "one group pretest-posttest design". Population in this research were class VIII students at SMP 3 Selong. The instruments used are interview sheets, observation sheets, product validation, student response questionnaire sheets, teacher response questionnaire sheets, learning device validation sheets, evaluation question sheets. The research results were analyzed using the method quantitative descriptive. The results of the analysis of pre-test and post-test evaluation questions increased, showing an average N-gain 0.70 with an average pre-test score of 23.97 and an average post-test score of 81.47. The t test results show that t calculated > t (0.05)(66), namely 30.40 > 1.66. This indicates that Problem Base Learning (PBL) based LKPD is effective in improving students' physics learning outcomes.
Pengaruh Model Pembelajaran Perubahan Konseptual Terhadap Higher Order Thinking Skills Peserta Didik Rahmani, Nadia; Hikmawati; Gunada, I Wayan; Gunawan
Kappa Journal Vol 8 No 1 (2024): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i1.25869

Abstract

Penelitian ini bertujuan untuk menguji pengaruh dari model pembelajaran perubahan konseptual terhadap higher order thinking skills peserta didik. Jenis penelitian yang digunakan adalah kuasi eksperimen dengan desain pretest and posttest control group design. Populasi dalam penelitian ini adalah seluruh peserta didik kelas XI MIPA SMAN 7 Mataram. Pengambilan sampel menggunakan teknik purposive sampling, sehingga diperoleh peserta didik kelas XI MIPA 1 sebagai kelas eksperimen menggunakan model pembelajaran perubahan konseptual dan XI MIPA 3 sebagai kelas kontrol mengggunakan model pembelajaran konvensional. Instrumen yang digunakan berupa tes soal pilihan ganda sebanyak 20 butir soal pada materi fluida statis yang mengacu pada higher order thinking skills pada indikator C4, C5, dan C6. Data higher order thinking skills dianalisis mengggunakan statistik parametrik yaitu t-test polled varians dengan taraf signifikan 5% dan diperoleh nilai yaitu 4,16 > 1,99. Sesuai kriteria uji hipotesis, apabila , maka Ho ditolak dan Ha diterima, sehinggga dapat disimpulkan bahwa model pembelajaran perubahan konseptual berpengaruh terhadap higher order thinking skills peserta didik.
Relevansi Etnosains pada Alat Transportasi Cidomo dalam Materi Fisika Hasan, Yulia; Firdaus, Fahmi; Andayani, Yayuk
Kappa Journal Vol 8 No 1 (2024): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i1.25918

Abstract

Penelitian ini bertujuan untuk mengidentifikasi relevansi etnosains pada cidomo dalam konteks materi fisika. Metode penelitian yang digunakan adalah penelitian deskiptif kualitatif. Teknik pengumpulan data melalui observasi, wawancara, dan studi pustaka. Kegiatan observasi lingkungan masyarakat dilakukan di desa Pejeruk dan Moncok telaga mas dengan 2 narasumber dari pelaku ettnosains dan 1 berasal dari guru muatan lokal. Intrumen pengumpulan data yang digunakan berupa lembar observasi, pedoman wawancara, dan lembar validasi ahli. Hasil penelitian menunjukan bahwa relevansi etnosains pada alat transportasi cidomo dalam materi fisika ditinjau melalui bahan dan proses pembuatan cidomo seperti momentum, kinematika, dinamika gerak, elastisitas bahan, dan kesetimbangan benda tegar. Hal ini menunjukkan bagaimana pengetahuan lokal dan ilmiah dapat saling melengkapi dalam pemahaman konsep fisika.
Alat Ukur Literasi Sains Pada Pembelajaran IPA Terintegrasi Lingkungan: Sistematika Literatur Review Adhari, Desi; Santiani; Yuliani, Hadma; Nasir, Muhammad
Kappa Journal Vol 8 No 2 (2024): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i2.26075

Abstract

The low level of scientific literacy in Indonesia is an important issue that must be addressed. One of the contributing factors is the lack of reliable and valid scientific literacy measurement tools. This study aims to analyze the dimensions and indicators used in developing scientific literacy measurement tools in science learning. The method used is a systematic literature review by collecting and reviewing 18 related research articles in the last 10 years. The results of the analysis show that most studies refer to the PISA framework which includes dimensions of explaining scientific phenomena, designing and evaluating research, and interpreting data and evidence scientifically. The integration of peatlands as a potential learning environment can be an innovative way to improve students' scientific literacy skills.
The Relationship Between Achievement Motivation And Learning Environment With Science Learning Outcomes Of SD Negeri 07 Pagi Rawamangun Students, Pulogadung District, East Jakarta Cayati, Cayati; Damayanti, Alfiani; Irfan
Kappa Journal Vol 8 No 1 (2024): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i1.26268

Abstract

Research has been conducted on the effect of Multi Leaf Collimator (MLC) on the dose received by the head of brain cancer patients at Sanglah Hospital, Denpasar. This analysis aims to determine the effect of using MLC on dosing to brain cancer patients using Cobalt 60 (Co-60) teletheraphy. The dose given at TPS was 200 cGy but after using MLC the dose was received because MLC protects healthy organs around the irradiation field. If the dose given is still within the range of -5  % and +7  %, it is still acceptable. The amount of radiation dose that can be reduced by using MLC in this study was 1,35 % for brain cases and 0,12 % for Glioblastoma cases. The result of the hypothesis testing shows: (1) there is a relationship positive and significant between achievement motivation with science learning outcome, (2) there is a relationship positive and significant between learning environment with science learning outcome, and (3) there is a relationship positive and significant jointly between achievement motivation and learning environment with science learning outcome.

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