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Journal of Science and Science Education (JoSSEd)

jossed
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Published by Universitas Mataram

ISSN : 27741869 EISSN : 27742105 DOI : https://doi.org/10.29303/jossed

Core Subject : Science, Education, Agriculture, Engineering,

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Neuroscience Physics

Journal of Science and Science Education (JoSSEd) is a Peer Review international journal published by Postgraduate Mataram University. It is firmly established as an authoritative voice in the world of science and science education. JoSSEd publishes scholarly papers that focus on science and science education like the teaching and learning of science in school settings ranging from early childhood to university education. It bridges the gap between research and practice, providing information, ideas, and opinion. As a truly international journal, JoSSEd welcomes contributions from any country provided that the authors explain their local contexts and demonstrate the significance of their work for a global readership.

Arjuna Subject : Umum - Umum

Articles 119 Documents

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Xbee Pro S1 Based Wireless Data Acquisition System for Landslide Monitoring Rika Ratnasari; Rahadi Wirawan; Laili Mardiana; Jakrapong Kaewkhao
Journal of Science and Science Education Vol. 2 No. 2 (2021): October
Publisher : Pascasarjana, Mataram University

Landslides are disasters that occur due to the shifting of land. To detect it, we need a system that can monitor it in real-time. Therefore, in this study, a wireless data acquisition system based on the Xbee Pro S1 module was built for monitoring landslides so that the community quickly responded in the event of a disaster. Testing the range of the module is very important to ensure that data communication between the transmitter and receiver can take place. The test carried out in this study was to take the plate distance data on the extensometer by adding a load and then detected using an ultrasonic sensor. The Xbee transmitter sends data to the Xbee receiver in real-time. From the test results, the maximum range of the Xbee Pro S1 module is 150m outdoors with an average delivery time of 15s from the transmitter to the receiver

Effectiveness of Problem Based Learning Device Development to Improve Generic Science Skills Via Monica Devi; Susilawati Susilawati; I Wayan Gunada
Journal of Science and Science Education Vol. 2 No. 2 (2021): October
Publisher : Pascasarjana, Mataram University

This development research aims to develop an effective problem-based physics learning device model to improve students' generic science skills. The type of research used is Research and Development (R&D) using a 4D model. This 4D model consists of four stages, namely Define, Design, Develop and Disseminate. The effectiveness of the learning device was obtained based on the analysis of the observation sheet on the implementation of the lesson plans from three observers was then determined using the calculation of the Interjudge Agreement (IJA) and the N-Gain test. Based on the results of the research that has been carried out, the results of the IJA calculation analysis show that the implementation of learning is above 75% with the N-Gain test results of 0.54 are in the medium category, while the average value for the pretest value is 36.91 and the average posttest value 68.75. So it can be said that the problem based model of physics learning tools used is effective in improving the generic science skills of students

Physicochemical Properties Of Used Cooking Oil Purified Using Shallot (Allium Cepa L.) Pell Adsorbent Baiq Fitri Rahmayanti; Yudin Citriadin; Sulistiyana Sulistiyana; Azlan Kamari; Ali Al-Mokaram
Journal of Science and Science Education Vol. 2 No. 2 (2021): October
Publisher : Pascasarjana, Mataram University

Damage to used cooking oil is caused by hydrolysis and oxidation processes, these reactions are formed due to the use of oil many times. In terms of physical damage occurred in the smell and color (brown oil, cloudy to blackish), chemical changes in the form of acid numbers and peroxide numbers are quite high. This study aims to determine (1) there is an effect of variations in the mass of the onion peel adsorbent on the physical properties of used cooking oil; (2) there is an effect of mass variation of onion peel adsorbent on the physical properties of used cooking oil; and (3) physicochemical properties of used cooking oil purified according to SNI 3741:2013. The research method uses an experimental research type with a quantitative approach. The study design used a completely randomized design (CRD). The data analysis technique used One Way ANOVA. The test parameters include odor test, color test, acid number test and peroxide number test. The adsorption temperature was constant at 70°C for 30 minutes, the mass variations of the onion peel adsorbent were 0 g (without onion skin), 5 g, 10 g, 15 g, and 20 g in 100 ml of used cooking oil. The results of the study of physical properties (smell and color), variations of 5 gr, 10 gr 15 gr and 20 gr produced "normal" odors, while variations of 10 gr, 15 gr and 20 gr color produced "normal". Furthermore, the chemical properties showed a decrease in the acid number after the purification process, the largest variation in the decrease in the acid number was in the 20 gr treatment as much as 74.56%, the largest decrease in the peroxide value in the 20 gr treatment as much as 90.63%.

The Correlation Between Concept Mastery and Students Moral Reasoning Stage Through Socio Scientific Issue Approach on Human Reproduction System Material Eva Sujiati; Baiq Sri Handayani; I Wayan Merta; Tri Ayu Lestari; I Putu Artayasa
Journal of Science and Science Education Vol. 2 No. 2 (2021): October
Publisher : Pascasarjana, Mataram University

The aim of this study was to obtain empirical data regarding the relationship between the mastery of concept, and the stage of students’ moral reasoning. The research method used was correlational research with cluster random sampling technique. The population in this study were all senior high schools in the city of Mataram and the sample consisted of 171 class XII students from three public senior high schools in the city of Mataram. Data collection was carried out using a concept mastery test instrument in the form of multiple choice questions and a moral reasoning stage test using a questionnaire on socio-scientific issues. The results of the research as a whole, it consisted of (1) Test of mastery of the material concept of the reproductive system of students in the less category with a percentage of 45%. (2) The moral reasoning test of students was categorized into the category of beginner reasoning stage with a percentage of 56% (3) The correlation test on concept mastery and moral reasoning stage used Spearman correlation and it showed that there was a significant relationship (r = 0835, = 0.000) with positive direction. This positive and significant relationship can be interpreted that the higher the mastery of the material concepts of the reproductive system of students, the better the stage of students’ moral reasoning.

The Effect of Variations of Drilling Bolt Distances on Bending Strength of Composite Wood Beams Satia Cahya Noviadi; I Wayan Sugiartha; Jauhar Fajrin
Journal of Science and Science Education Vol. 3 No. 1 (2022): April
Publisher : Pascasarjana, Mataram University

Wood products that are currently growing rapidly in many places in the world are laminated blocks (glulam). Laminate beam has many advantages in terms of size, strength and artistic. However, this laminated beam has a few drawbacks in terms of providing tools and materials for some areas. The laminated beam itself uses an adhesive material which is relatively expensive and requires a compression tool in its implementation. Therefore, an alternative is given in the form of composite beams. Composite beams that have developed so far use shear connectors in the form of bolts, nails, and pegs as the connecting tool. Meanwhile, shear connectors using drilling bolts have never been done. Therefore, based on this, it is necessary to research composite wood beams with an alternative, namely using drilling bolts as shear connectors in order to obtain the effect of variations in the distance of drilling bolts on the flexural strength of composite beams. The results of the flexural strength test obtained the strength of the composite beam with shear connectors with the largest distance of 3.125, followed by beams with shear connecting distances of 6.25 cm, 12.5 cm and 25 cm. This shows that the closer the shear connecting distance, the greater the strength obtained, with the percentage increase in variation of 31.5%, 38.737% and 46.072%, respectively.

Student Responses related to Face-to-Face Learning Policies to Overcome Learning Loss Condition Dedi Riyan Rizaldi; Ziadatul Fatimah; Susilawati Susilawati; Muh. Makhrus
Journal of Science and Science Education Vol. 3 No. 1 (2022): April
Publisher : Pascasarjana, Mataram University

This study aims to describe student responses and learning outcomes related to the re-implementation of face-to-face learning policies to overcome learning loss conditions. The type of research used is descriptive qualitative research with field research methods, namely collecting data directly from the research site. The sample in this study was 30 students at Madrasah Aliyah Plus Nurul Islam Sekarbela who represented each department (Science and Religion) from grades 10 to 12. The research data obtained consisted of two forms, namely student response data (using a questionnaire) and result from data student learning (using the student's final grade score average). Based on the problems and discussion, it can be seen that the student's response to the re-enactment of face-to-face learning in class is quite good when compared to using an online learning system (learning from home). This is also supported by student learning outcomes using the face-to-face learning system in madrasas that have a higher final average score than during the online learning process.

The Analysis of Alcohol Content in Cassava (Tape) Fermentation Process Sherly Nur Laili; Sudarti Sudarti; Trapsilo Prihandono
Journal of Science and Science Education Vol. 3 No. 1 (2022): April
Publisher : Pascasarjana, Mataram University

The fermentation process in making cassava tape (Manihot esulenta) worked on the alcohol content. The alcohol content differed during the fermentation process. The objective of this research was analyzing the alcohol content produced in the fermentation process of cassava tape (Manihot esculenta). The data interpretation method was experimented in this research. Three samples of tape were treated with ELF magnetic field exposure involving the intensity of 200µT with 15-minute exposure and the intensity of 300µT with 15-minute exposure. The tools used in this research were a thermometer to measure room temperature and a portable alcohol brix ATC meter refractometer to measure alcohol content. The results showed the average alcohol content on the first day was 8-10%; it increased on the following day by 25% and on the third day, it reached 36-38%. Thus, the longer the fermentation process, the higher the alcohol content would be; it can be concluded that the samples treated with ELF magnetic field at the intensity of 300uT obtained the highest alcohol content.

Analysis of Exposure to an Extremely Low Frequency (ELF) 700 μT and 1000 μT Magnetic Fields in Tuna Meat (Euthynnus Affinis C) Sudarti Sudarti; Karina Laksmiari; Elok Permatasari; Farida Wahyu Ningtyas
Journal of Science and Science Education Vol. 3 No. 1 (2022): April
Publisher : Pascasarjana, Mataram University

The resistance of tuna meat in a room temperature classed quietly short as it takes approximately 6 hours has encountered a process of decay. Consequently, the technology is needed to increase its durability. This study aims to analyze the exposure to Extremely Low Frequency (ELF) 700 μT and 1000 μT magnetic fields in tuna meat (Euthynnus Affinis C). The sample was 3300 grams of fresh tuna meat, which had been stored in the refrigerator for 4 hours as it was divided into 66 plastic wrappers (50grams), then grouped into three groups. They were the control group (K), the ELF magnetic fields intensity 700 μT (E700) group, and the ELF magnetic fields ELF intensity 1000 μT (E1000) group with variations in an exposure time of 15 minutes, 30 minutes, and 45 minutes. Measurement of pH and assessment of physical condition was carried out on the 5th, 10th, and 15th hours after being exposed to the ELF magnetic fields. The results highlighted the pH value in all groups exposed to the ELF magnetic fields was significantly lower (p < 0.05) than the control group. Meanwhile, the physical condition of tuna exposed to the ELF magnetic fields appeared to be better than the control until the 15th hour of storage. Conclusion: Exposure to an ELF magnetic field with an intensity of 1000 µT for 15 minutes has the potential to increase the physical resistance of tuna until the 15th hour after being exposed to an ELF magnetic field

Ethnopharmacological study of the Selected Tribal Medicinal Plants of the Tboli People in Lake Sebu, South Cotabato Alvin Q. Larida; Johnryk B. Soldevilla; Christopher John B. Ursabia; Dominique Rose C. Blanco
Journal of Science and Science Education Vol. 3 No. 1 (2022): April
Publisher : Pascasarjana, Mataram University

Around 80% of people around the world have practiced the use of ethnopharmacological medicine. Tboli tribe of Lake Sebu, South Cotabato, Philippines recognized medicinal plants for healing. There were two identified plants by the Tboli people, the Bulok bukay (Stachytarpheta jamaicensis) and Kluonmabu (Ageratum conyzoides L.) as a potential medicine for wound healing. The plants underwent antimicrobial analysis, phytochemical screening, and functional groups detection through FTIR. The zone of inhibition for Bulok bukay showed antimicrobial potential in all concentrations. Kluonmabu observed as not as effective as the other plant against S. aureus. With the p = 0.0641 at 0.05 level of significance, Bulok bukay showed to be effective against bacteria and comparable with a commercial antibiotic. Furthermore, phytochemical properties for both plants have been observed with more components of alkaloids and terpenoids in Bulok bukay. FTIR confirmed as well that two plants have the potential presence of functional groups against bacteria

Assessment of Duration and Frequency of Drought by Percent Normal Precipitation Index (PNPI) for Lombok Island Humairo Saidah; Muh. Bagus Budianto; I Wayan Yasa; Syamsul Hidayat; I Dewa Gede Jaya Negara; Heri Sulistiyono
Journal of Science and Science Education Vol. 3 No. 1 (2022): April
Publisher : Pascasarjana, Mataram University

Meteorological drought is a climatic condition categorized by a scarcity of rainfall. Understanding the drought characteristics is a significant step appointed uncertain climate conditions due to current global climate change. This study aims to assess the duration and frequency of drought using the Normal Precipitation Index (PNPI) method to identify drought characteristics in the study area. The PNPI revealed a spatial variation in percent value monthly rainfall to average rainfall across the island of Lombok that prolonged and severe droughts have occurred in entire study areas with varying duration and frequency. PNPI method in analyzing drought events in the island of Lombok showed that Sopak is the driest area and Sekotong is the wettest one

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Contact Name
Hamidi

Contact Email
hamidi@unram.ac.id

Phone
+6281936732708

Journal Mail Official
editor.jossed@gmail.com

Editorial Address
Jl. Pendidikan No 37 Mataram

Location
Kota mataram,

Nusa tenggara barat

INDONESIA

Abstract

Abstract

Abstract

Abstract

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Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Hamidi

Contact Email hamidi@unram.ac.id

Phone +6281936732708

Journal Mail Official editor.jossed@gmail.com

Editorial Address Jl. Pendidikan No 37 Mataram

Location Kota mataram, Nusa tenggara barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Hamidi

Contact Email
hamidi@unram.ac.id

Phone
+6281936732708

Journal Mail Official
editor.jossed@gmail.com

Editorial Address
Jl. Pendidikan No 37 Mataram

Location
Kota mataram,

Nusa tenggara barat

INDONESIA