EISSN : 2549-2950
Published by: Universitas Hamzanwadi (10.29408)
Total articles ≅ 66
Latest articles in this journal
Kappa Journal, Volume 5, pp 1-9; doi:10.29408/kpj.v5i1.3446
Method has been carried out. Research is done on mild steel zincalume type with immersion treatment (NaCl 3.5%) for 10 days, and 30 days and without immersion. Mild steel is laser irradiated (Nd-YAG 1064 nm, 7 ns) with energy of 120 mJ, and the data is taken with an accumulation of 3, delay time of 0.5 µs. Elements identification is done by taking data from up to 75 μm from the surface. The results of the analysis with LIBS showed immersion for 10 days, the corrosion rate and hardness of mild steel increased with 30 days immersion. The increase in the corrosion rate of mild steel is indicated by decreasing the value of dissolved oxygen intensity, the electrochemical reaction is fast. The decrease in the corrosion rate is indicated by the increase in the intensity value of Zn and Al elements associated with the formation of a passive film on the metal surface as a protective layer to protect further corrosion attacks.
Kappa Journal, Volume 4, pp 197-203; doi:10.29408/kpj.v4i2.2621
In the development of student oriented learning models to improve students' physics problem solving ability aims to develop a student-oriented learning model consisting of a syllabus, lesson plans, student worksheet and problem solving ability evaluation tools (KPM). This study uses a research and development type with a 4D model research design, namely Define, Design, Develop, and Desseminate. At the Define stage, curriculum analysis, student ability analysis, task analysis, concept analysis and analysis of learning objectives are carried out. The design stage is carried out by designing the learning device. At the Develop stage, product manufacturing, product expert validation, product revisions, testing of problem-solving ability evaluation tools were carried out, while at the Desseminate stage there was no product distribution on the grounds that it was still in the COVID 19 pandemic. The try out was conducted on a research sample (30 students) class XI MIPA4 SMA Negeri 2 Mataram which was conducted online. The results of the expert validator analysis of the student oriented learning model obtained valid results. Reliability and validity tests of the problem solving ability evaluation (KPM) instrument obtained reliable and valid results. Based on these findings, it can be concluded that the learning tools and problem solving ability evaluation tools are feasible to be applied to classroom learning.
Kappa Journal, Volume 4, pp 188-196; doi:10.29408/kpj.v4i2.2607
The seismic refraction method is one of the geophysical methods which is based on measuring the response of seismic waves in the soil that are fractured along the soil and rock layers. One of the seismic refraction method application is to determine the layers and rocks types below the surface. This study uses a geophone as a catcher for seismic waves that are emitted below the surface. The waves caught on the geophone are converted into seismic data which can be read in a seismograph. Seismic data read by seismographs are already in digital form and stored in the central unit PASI 16S24-P. The results of the data analysis concluded that below the land surface of the village of Medana, there were 3 rock layers with a thickness of the first layer 3-4 meters, the second layer 2-5 meters and the third layer 10-17 meters. The first and second layers are still in the form of soil (less compact), while the third layer is in the form of rock (compact). The level of hardness (density) will be more compact in linear to the depth, the more the depth will be the more compact the rock. The depth in the form of hard rock starts from 16 meters to 23 meters from the ground level of the village of Medana, Central Lombok.
Kappa Journal, Volume 4, pp 136-142; doi:10.29408/kpj.v4i2.2605
This study aims to determine the effect of the cognitive conflict approach on the critical thinking skills of senior high school students in grade X on straight motion material. This type of research is a pre-experimental research design with One Group Pretest-Posttest Design. The population in this study were all students of class X MIPA SMAN 1 Narmada. The research sample was obtained using a purposive sampling technique, obtained class X MIPA 1 as experimental class 1, class X MIPA 2 as experimental class 2, and class X MIPA 3 as experimental class 3. Data collection on critical thinking skills used essay test as many as 5 questions. Hypothesis test analysis used a statistical paired sample t-test and showed that Ho was rejected and Ha was accepted. This shows that the cognitive conflict approach affects the critical thinking skills of students in straight motion material. This approach can be an alternative solution for various methods/models/approaches in learning physics.
Kappa Journal, Volume 4, pp 217-224; doi:10.29408/kpj.v4i2.2549
Student worksheet based on hands on and minds on activity that designed to improve student learning outcomes is not yet available, especially for simple harmonic movement. The aims of this research are to produce simple harmonic movement’s student worksheet based on hands on and minds on activity that are valid and practice. The model that used for this research is the ADDIE model, within simple harmonic movement’s student worksheet based on hands on and minds on activity as the subject of this research. The subject of this research is student worksheet. The data of this research is obtained from validity sheets and assessment sheets of student worksheet legibility by students. Data analysis was performed through the validity tests and the average score of student worksheet legibility by students. This research shows that: (1) the validity of simple harmonic movement’s student worksheet based on hands on and minds on activity is 3,23 that categorized as valid; and (2) the practicality of simple harmonic movement’s student worksheet based on hands on and minds on activity is 72,00% that categorized as practice. It can be concluded that simple harmonic movement’s student worksheet based on hands on and minds on activity can be used in the learning process.
Kappa Journal, Volume 4, pp 225-232; doi:10.29408/kpj.v4i2.2237
The purpose of writing this article is to explain the application of online based learning using the Zoom Cloud Mettng application during the COVID-19 pandemic. The writing of this article uses a qualitative method of literature review by collecting data in the form of secondary data obtained from various sources such as articles, notes, or other scientific sources. The data collected is then analyzed inductively. Based on the literature review, data analysis, and discussion, it can be concluded that the Zoom Cloud Metting application is an effective medium used in the learning process during the COVID-19 pandemic because it is able to facilitate educators and learning to be able to interact while continuing to prioritize health protocols during the pandemic COVID-19, namely Physical Distancing or maintaining distance.
Kappa Journal, Volume 4, pp 263-268; doi:10.29408/kpj.v4i2.2971
This study aims to determine the effect of derivative and integral mastery on the learning achievement of physics class XI IPA students on motion kinematics material. The population of this study were all students of class XI IPA at Madrasah Aliyah NW Kotaraja, amounting to 36 people. The research method used is the Ex Post Facto method, by not providing treatment but directly conducting evaluations related to students 'abilities in motion kinematics material and also students' abilities related to inherited and integral abilities. The data analysis technique used is regression analysis. From the results of the analysis, it is found that Freg-count = 4.282 and Freg-table = 4.130 (Freg-count> Freg-table), the conclusion of this study is that the derivative and integral mastery affects students' physics learning achievement on the subject of motion kinematics.
Kappa Journal, Volume 4, pp 250-255; doi:10.29408/kpj.v4i2.2680
This study aims to develop problem-solving based teaching materials (LKPD) with to business and energy materials. This type of research is development research / research and development. The development model used in this research is the 4D model, namely define, design, develop, and disseminate. Testing of problem solving-based student worksheet development products with a scientific approach is carried out through validation from material experts, media experts, subject matter teachers, and student questionnaire responses. The data technique used non-test (questionnaire and expert validation sheet). The technique of analyzing data from the distribution of questionnaires was carried out by tabulating the data from each validator, calculating the average score, and comparing the total score with a scale of five. Based on the results of 3 material experts, it shows that the quality of the LKPD is in the feasible category with a percentage value of 80%. Meanwhile, the results of 3 media experts show that the quality of LKPD is in the decent category with the proportion of the value of 77.15%. And based on the results of 2 subject teachers, it shows that the quality of the LKPD is in the decent category with a proportion of 82.5%. Meanwhile, the cost of student responses is in the very good category with an actual score of 78.4.
Kappa Journal, Volume 4, pp 143-148; doi:10.29408/kpj.v4i2.2632
This study aims to train students' critical thinking skills during the learning process using CCM-CCA assisted by virtual experiments. The material used for research in optics. This type of research uses a quantitative approach. The subjects in the research were 30 physics education students at a university in NTB. The ability to think critically during the learning process is trained with student worksheets equipped with instruments for critical thinking. Learning is carried out for 3 meetings. The results showed that there was an increase in students 'critical thinking skills from the low category with an average score of 38 to the high category with an average score of 75. This fact shows that CCM-CCA learning assisted with virtual experiments can train and even improve students' critical thinking skills in Optical material.
Kappa Journal, Volume 4, pp 158-164; doi:10.29408/kpj.v4i2.2838
Inetractive learning media is a medium that can help students and teachers in learning. This study aims to see the role of science teachers in the use of instructional media. This type of research is qualitative non-experimental. The population of this study were students of SMPN 2 Singai Aur Pasaman Barat. Sampling using purposive sampling. Data were collected through a questionnaire with 2 indicators. Based on data analysis using statistical data in the form of percentages and relative frequencies, it was found that the indicator of teacher control of the media used had a score of 94.61% and the media indicators used were good, efficient, and could attract the attention of students in the learning process 88.31% so that it could be concluded that the role of science teachers in the use of interactive learning media has a score of 91.46% with a good category.