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Saprizal Hadisaputra
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Jurnal Pijar MIPA
Published by Universitas Mataram
ISSN : 19071744     EISSN : 24601500     DOI : -
Core Subject : Science, Education,
Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Physics
Jurnal Pijar MIPA (e-ISSN: 2460-1500 & p-ISSN: 1907-1744) is an open-access scientific periodical journal published by the Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA publishes original articles on current issues and trends in mathematics-science-science education studies. In addition, this journal addresses issues concerning environmental education and environmental science. The journal scopes are: a. Physics and Physics Education b. Chemistry and Chemistry Education c. Biology and Biology Education d. Natural Science and Science Education e. Mathematics and Mathematics Education f. Environmental and Environmental Education
Arjuna Subject : Umum - Umum
Articles 30 Documents
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Search results for , issue "Vol. 19 No. 3 (2024): May 2024" : 30 Documents clear
An Ethnoscience Exploration of Terbang Gembrung Percussion From Kampung Naga, West Java and the Potential as Local Context in Physics Education Sarah, Lia Laela; Liliawati, Winny; Sriyati, Siti
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i3.6751

Abstract

This research aims to explore the ethnoscience of the Terbang Gembrung percussion instrument of the indigenous community in Kampung Naga, Tasikmalaya, West Java, and its potential as a local context in physics education. The Terbang Gembrung percussion instrument of Kampung Naga employs an acoustic membrane of goat leather with an air column of albasia or manglid wood. The research methodology encompasses qualitative descriptive methods, including literature study and interviews, as well as observation methods involving the measurement of sound frequency generated using the Decibel X smartphone application under conditions where the instrument produces typical sound. The Terbang Gembrung tradition holds religious value and is commonly performed during significant celebrations such as Eid al-Fitr, Eid al-Adha, and other religious festivities. Based on the observation results, it was found that four types of percussion instruments produce sound frequencies at four harmonic levels according to the membrane size. The first harmonic has a frequency of approximately 199.0 Hz, the second harmonic around 211.5 Hz, the third harmonic approximately 231.5 Hz, and the fourth harmonic around 261.0 Hz. The design of the percussion instrument is in the form of a half-spherical cone, with the cross-sectional area decreasing from the membrane to the end of the air column. The potential application of science principles to the Terbang Gembrung percussion instrument makes it a cultural artifact that can serve as a local context in physics education at the high school level, focusing on the topics of sound waves, especially sound intensity and sound frequency.
Design and Construction of Mice Detection and Removal Equipment in the House Based on the Internet of Things (IoT) Lubis, Zakia; Nasution, Mulkan Iskandar; Nasution, Nazaruddin
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i3.6771

Abstract

Rats are rodents that have a negative impact on society, both in agriculture and industry. Rodents roaming around in the house can damage electrical connections, which can trigger fires and cause fires, as well as causing economic losses. This research used a PIR sensor to detect movement and an ESP32 cam to stream live video on the blynk application. Box two contains a series of ultrasonic sound generators emitted through speakers. Additionally, tool tests were carried out using a 12 V battery test, PIR sensor test, relay test, ESP32 Cam, ultrasonic generator PWM test, Blynk test, and tool test on mice. This research aims to design a device for detecting and repelling mice in homes based on the Internet of Things (IoT). The design of this tool uses an ESP32   microcontroller as the main controller. This tool also has components such as an ESP32   cam, relay, ultrasonic speaker, 3.7-volt battery, PIR sensor, servo motor, and ultrasonic sound generator module. This tool has a working system in the form of a PIR sensor that detects mouse movement. Then the ultrasonic sound automatically comes on, the servo motor moves and the ESP32   cam connected to the Blynk application will stream live video. This tool also has an on and off button system via the blynk application. The test results carried out by the PIR sensor were able to detect the presence of objects at a distance of 5 m. The frequency issued by the ultrasonic module and measurements made via an oscilloscope has an average percent error of 1,02%. This proves that the performance of the designed prototype tool works well. The results of tests to repel mice using ultrasonic sound, which could disturb the mice, were at 40-50 kHz. The overall test results for the home IoT-based mouse detection and repellent system worked well.
Design and Construction of an Automatic Chili Plants Watering System Based on the Internet of Things (IoT) Using the Blynk App Aisyah, Siti; Nasution, Mulkan Iskandar; Nasution, Nazaruddin
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i3.6772

Abstract

Chili is one of the vegetables cultivated by Indonesian farmers because of its high market value and many health benefits. Manual watering of plants still has weaknesses because water use is unlimited, especially for chili plants. Therefore, IoT is needed to water plants automatically and in real-time based on soil moisture and can monitor chilli plants' air temperature and pH. This research aims to replace manual watering with automatic watering. The system was tested and installed in a greenhouse using UV plastic measuring 70cm × 70cm × 70cm. The microcontroller used is ESP32. Other components are RTC DS3231, capacitive soil moisture sensor, DHT22 sensor, soil pH sensor, water pump, and blynk application. This device operates when reading input from the RTC, namely 07:00 WIB and 17:00 WIB. The watering pump will work at humidity <60% and stop at humidity >80%. At temperatures <24˚C, the lamp will be active and at temperatures >33˚C to <55˚C, condensation will be carried out using a nozzle sprayer. The soil pH sensor detects soil conditions, namely acidic, neutral or alkaline. The results of this research are quite good and follow the designed program. The average % error on the DHT22 sensor is 1.433%, and the soil pH sensor is 0.74%. Capacitive soil moisture sensors are also quite good at reading soil moisture conditions. Likewise, the RTC test has a time difference of only 6 seconds with the comparison tool.
Development of Augmented Reality Media on PjBL Learning Model of Human Motion Organ Material to Improve Learning Outcomes Maulidannisa, Naila; Ansori, Isa
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i3.6780

Abstract

This research aims to develop and test the feasibility and effectiveness of AR-based learning media (augmented reality) so that students become more active in following the learning process. This research and R&D (Reseacrh and Development) with the ADDIE development model design. The novelty of this research is the development of Human Movement Organs (bones) with interactive edugame evaluations that improve students' cognitive learning outcomes. Analysis of the data obtained after the research stages are carried out. The results showed that AR-based learning media (augmented reality) was successfully developed, feasible, and effective to use as learning media, seen from the results of media validation obtained a percentage of 84.72%, material validation obtained a percentage of 83.30% and student response obtained a percentage of 88.46%. The conclusion of the Augmented Reality media development research on the PjBL learning model of Human Movement Organ material was successfully developed, very feasible, and effective for improving the learning outcomes of Nabaul Ulum Wonorejo students in Pati Regency.
Analysis of Students Chemistry Laboratory Literacy in High School Mutiah, Mutiah; Junaidi, Eka; Irawan, Jono
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i3.6785

Abstract

This research aims to identify the laboratory literacy level of SMA/MA students in Mataram City and describe laboratory literacy in 4 aspects: context, content, competence, and attitude, in carrying out practicums in the laboratory. Laboratory literacy measurement techniques through stages pre-lab to measure the ability of the content aspect, namely identifying knowledge initial or basic concepts that support practicum, subsequent stage lab work to measure context aspects, namely problem identification, analysis objectives, and principles of analytical methods for testing scientific ideas, and attitude aspects during practicum. Stagepost lab measuring competency aspects related to data analysis from practicum results as a basis for decision making. The research data was analyzed descriptively. Research results show that value. The average student laboratory literacy in the context and attitude aspects is high, namely 78.22 and 86.8, but for the content and competency aspects, it is still low, namely 54.26 and 54.15. The conclusions of this research are as follows: (1)Ability The average laboratory literacy of SMA/MA students in the city of Mataram is a category enough, namely 67.71. (2) The ability to apply chemistry to real-life problems (Chemical Literacy) can be improved by optimizing the use of laboratories as chemistry learning centers
Integrative Approach to Evaluation of Physical, Chemical and Biological Parameters: Analysis of Mujur River Water Quality Supardiono, Supardiono; Rahayu, Rachmawati Noviana; Nurhidayatullah, Nurhidayatullah
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i3.6786

Abstract

This study uses an integrative approach to evaluate physical, chemical and biological parameters in the analysis of Mujur River water quality. This shows the complexity of interactions between various factors in determining river water quality. The purpose of this study was to understand the integrative impact of such factors on water quality. The research method involves collecting physical, chemical and biological data from the upstream, middle and downstream locations of the Mujur River. The results showed a complex pattern of interaction between physical, chemical and biological parameters that provided a deep understanding of river conditions. The conclusion of this study is the importance of an integrative approach in evaluating river water quality. In the future, it is necessary to implement more effective management measures to ensure the sustainability of the Mujur River and the surrounding ecosystem.
Implementation of Problem Based Learning Models to Improve Learning Outcomes of Plant and Animal Cell Structures Kusmiyati, Kusmiyati; Wibawa, I Made Ari; Mulyanthi, Dewi Iryani
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i3.6797

Abstract

Various learning problems teachers face in schools must be solved with alternative solutions supporting 21st-century learning, which develops student-centered learning and provides a problem-solving experience in the real world. The Problem-Based Learning (PBL) model was chosen as a solution, providing the broadest possible experience for students to think critically, creatively, collaboratively, and communicatively. This research aims to improve learning outcomes of plant and animal cell structures through a problem-based learning model. Data was collected in two SMAN 1 Kerambitan class XI MIPA meetings, totalling 27 people. Cognitive learning outcomes are taken at the end of the meeting, while affective and psychomotor learning outcomes are taken during the learning process. The learning results are then subjected to qualitative analysis to determine learning completeness. The scores obtained by students are compared with the minimum completeness criteria that apply in 70 schools. Cognitive learning results at the first meeting show an average score of 74 for the number of students. Twenty-four people completed it, and three did not, while at the second meeting, the average score was 82, and all students completed it. It can be concluded that implementing the PBL model can improve the learning outcomes of plant and animal cell structures.
The Analysis of Filtration Efficiency to Reduce BOD and COD Levels in Domestic Waste at the Communal WWTP of Bilebante Village, Pringgarata District, Central Lombok Nurhidayah, Nurhidayah; Sholehah, Hijriati; Al-Qarni, Jisul
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i3.6818

Abstract

This research aims to determine the level of reduction in BOD and COD in household wastewater after the filtration process and to determine the efficiency of the filter media in reducing BOD and COD in sewage. The research was conducted in Bilebante village, Central Lombok Regency, NTB. The method takes three wastewater samples at different locations before and after the filtration stage. The results of the research show that the COD concentration in domestic wastewater before going through the processing process using filtration media obtained a result of 63 mgl/L, then at the filtration stage using plastic bottle media, the result was 34 mgl/L with an efficiency value of 46%, and at the filtration stage using activated carbon media, a value of 12 mgl/L was obtained so that the resulting efficiency value was 64%. The results of the BOD concentration in domestic wastewater before going through the processing process using filtration media obtained an initial result of 1.6 mgl/L; then, at the filtration stage using plastic bottle media, the result was 0.6 mgl/L with an efficiency value of 62 %. At the filtration stage using active carbon media, a value of 0 mgl/L was obtained, with an efficiency value of 100%. This research concludes that wastewater is safe to use, whether for watering plants or other things because there is a decrease in levels of COD and BOD that meet quality standards.
The Effect of Project Based Learning Model on the Students Questioning Ability Komalasari, Baiq Resti; Setiadi, Dadi; Kusuma, ASHM; Jufri, A. Wahab
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i3.6834

Abstract

The questioning ability is the foundation for building students' thinking skills in finding solutions to problems. This study aimed to determine the effect of the project-based learning model on the ability to ask questions of biology students in class X SMAN 7 Mataram. Quasi-experimental method and Nonrandomized Control Group Design were used in this study with a quantitative approach. The population of this study was class X SMAN 7 Mataram, and random sampling was used as a sampling technique so that four classes were obtained as samples with details of class XG and XF as the experimental group while XK and XL as the control group. The instrument used is Questioning Skills. Data collection of students' questioning skills is done by making five questions, then analyzed by anacova (analysis of covariance) at the 5% significance level using the SPSS 21 program. The results of hypothesis testing in this study show an effect of the project-based learning model on the ability to ask biology students in class X SMAN 7 Mataram.
Development of Green Composite Based on Recycled-Low Density Polyethylene (r-LDPE) as an Environmentally Friendly Packaging Hamdiani, Saprini; Kamali, Siti Raudhatul; Ismillayli, Nurul; Kurniawati, Lely; Sumarlan, Iwan
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i3.6836

Abstract

Low-Density Polyethylene (LDPE) is one of the most popular and commonly used petroleum-derived thermoplastics for packaging. The large production of LDPE has an environmental impact. Reducing production can be done by recycling LDPE (r-LDPE) and adding organic fibres as a filler that is easily decomposed. Cattle farming solid waste as a fibre source was mixed with r-LDPE with coupling agent maleic anhydride (MA). Before use, the cow manure was processed through a bleaching and hemicellulose removal process, which resulted in Cow Manure Fiber (CMF). The CMF was analyzed using FTIR spectroscopy and microscopic fibre dimension analysis. The FTIR results showed peaks at wavenumbers 3538 and 1056 cm-1, representing the -OH, -C-O and -CH functional groups from the cellulose structure. The resulting composites were tested for physical properties, including elastic modulus, yield stress, and elongation. Pure LDPE material was also used for comparison. The best physical properties of the composites were obtained by composites with 95% r-LDPE, 5% CMF, and 2% MA.

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