EISSN : 2549-2950
Current Publisher: Universitas Hamzanwadi (10.29408)
Total articles ≅ 65
Latest articles in this journal
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 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 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 127-135; doi:10.29408/kpj.v4i2.2351
This study aims to determine the effect of the application of guided inquiry learning models with the practice of converting heat to electricity to improve critical thinking skills. The population of this research is all students of class XII Science of SMA Negeri 1 Way Jepara. The selection of research samples using purposive sampling techniques with a sample of class XII Science 5 totaling 33 students. The research design used was One Group Pretest-Posttest. Learning is done by conducting practicum activities using a set of guided inquiry-based heat energy conversion devices. The tool used in practicum activities is an advantage in this study because there has been no previous research that uses practicum learning methods with tools to convert heat energy to electricity. Practicum activities carried out on two learning topics or practicum twice. In practicum activities topic one is about the unit thermoelectric generator module specifications and in practicum activity topic two is regarding the thermoelectric generator circuit to turn on the LED lights. Data were tested by N-gain analysis, normality test, Paired Sample T-Test. Based on the results of the Paired Sample T-test, it can be seen that the significance value of 0.00 is less than 0.05, it can be concluded that there is an influence of students' critical thinking skills before and after using guided inquiry learning models with energy conversion practicum.
Kappa Journal, Volume 4, pp 149-157; doi:10.29408/kpj.v4i2.2666
The purpose of this study is to describe the results of the Define stage in the development of STEM (Science, Technology, Engineering and Mathematics) -based learning devices to improve students' higher order thinking skills. The learning device development model used is the four D model (Define, Design, Develop, Disseminate). The Define stage is carried out to define and define learning requirements. The steps that have been taken at the Define stage are front end analysis, student analysis, task analysis, concept analysis, and formulation of learning objectives. The results of the research for needs analysis are a description of the competencies that students must have after taking physics lectures, the learning approach used is based on STEM, the profile of graduates to answer future challenges and demands. The results of research for student analysis are descriptions of student characteristics which include reasoning abilities, background knowledge, and levels of student cognitive development. The results of research for task analysis are in the form of module position maps. The results of the research for concept analysis are in the form of a concept map about oscillations. The results of the study for the formulation of learning objectives were a description of the competencies consisting of attitudes, knowledge and skills. The conclusion from this research is that the Define Stage has been completed so that the development stage of learning devices can be carried out to the next stage, namely the Design stage
Kappa Journal, Volume 4, pp 172-177; doi:10.29408/kpj.v4i2.2677
Self Potential arises due to electric charge of minerals in contact with the electrolyte solution around these minerals. Charge Occurrence Probability (COP) is one of the methods of interpretation of potential self data, the measurement of which is carried out using two porouspot electrodes.. This study aims to create a computer-based program Matlab is for calculating COP. The stages of this research are creating program algorithms, making Matlab-based syntax and making the main program for COP calculation. The program that has been created is then tested on synthetic data formed by the convolution of potential fields with random numbers. The study is limited to two-dimensional computation algorithms. Theoretically, the resulting resolution of this algorithm depends on the data density of the self potential. This program is proven to provide a good map for interpretation of potential self data
Kappa Journal, Volume 4, pp 233-239; doi:10.29408/kpj.v4i2.2756
This study aimed at detemining the effect of Problem Based Learning Model on the ability of students’ critical thinking through lesson on the topic of effort and energy. The method of research was an experimental research by using post-test-one control group design. Experimental class was treated by problem based learning, while the control class was taught by conventional learning through lesson study. Population of this research was the high school at Al Hamzar, Tembeng Putik of the X grade which consisted of two classes. Those were X Mathematics and natural science 1 and X Mathematics and Natural Science 2 with the total number or students was 58. The sampling thechnique applied was saturated sampling technique. Then, the instrument used in the present research was essay test which contained 6 items. The test arrangement followed the indicators of critical thinking with a variety of possible answers. Having implemented both in the experimental and in the control class, there were improvements in learning process in tems of managing the time, the students and doing aperception. Testing hyphoteshis result by uisng t-test showed t-test = 1. 25 and t-table in signifance level was 5% was 0. 07, so t-test> t-table which meant the alternative hyphothesis (Ha) was accepted and null hyphothesis (Ho) was rejected , it could be concluded that problem based learning thorugh lesson study was significantly effective in students’ critical ability on the topic of effort and energy for the tenth garade students at Al Hamzar high school.
Kappa Journal, Volume 4, pp 256-262; doi:10.29408/kpj.v4i2.2652
This study aims to develop and test the feasibility of physics practicum modules based on open ended problems on the subject of harmonic vibrations. This research type is research and development (R & D) by Sugiyono using 8 stages, namely potential and problems, data collection, product design, validation of practicum modules, improvement of practicum modules, practicum module trials, revision of practicum modules, and final products. The feasibility test for practicum module based on open ended problem uses a Likert scale questionnaire with validation by two validators. Research subjects MIPA MAN 5 Cirebon students, amounting to 9 students. The instrument used in the form of practical modules and questionnaire responses of students. The results of this research and development analysis were produced by practicum module products based on open ended problems on the subject of harmonic vibrations with an average validator score of 5.00 or (100%) with the Very Good (SB) category and the average score of students 4, 02 (80.40%) included in the Good category (B). So it can be concluded that the development of physics modules based on open ended problems is feasible to be used as practical teaching materials.
Kappa Journal, Volume 4, pp 240-249; doi:10.29408/kpj.v4i2.2611
The 4D microgravity method is a development of the gravity method with the time as the fourth dimension. This research was conducted to find a better way of interpreting the 4D gravity anomaly due to fluid injection around the reservoir. Researchers used GRABLOX for the interpretation of 4D anomalies around the reservoir. The results of the inversion of field data using GRABLOX provide the value of the injection fluid infiltration volume, which shows the distribution of the injection fluid movement on the reservoir. Another physical parameter that can be generated from GRABLOX with a modified value is the reduction in oil and gas saturation due to fluid injection. The inversion results using GRABLOX in the field data indicate a change in reservoir rock density up to 0.28 gr/cc associated with a reduction in gas and oil saturation. The reduction in gas saturation due to the injection fluid has the smallest value of 0% and the largest is up to 66%. The reduction in oil saturation only contributes to a density change of 20% of the reduction in gas saturation. The results of the GRABLOX trial on synthetic data and field data show that both can provide an identification of the movement of the injection fluid in the reservoir, as well as provide other physical parameters, ie. the reduction in oil saturation due to fluid injection.
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.