Jurnal FKIP Universitas Mataram (Fakultas Keguruan Dan Ilmu Pendidikan)
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Biological Population of Torpedo Scad (Megalaspis cordyla) in The Waters of Lampung Bay
Get PDFMegalaspis cordyla, a demersal fish popularly referred to as torpedo scad, is the most commonly caught fish. As market demand and consumption rise, this will have an adverse effect on the sustainability of fish resources if improperly managed. The aim of this research was to analyze the population dynamics of Megalaspis cordyla in the waters of Lampung Bay. The study was carried out between April and September of 2024. Fishermen's catches in the waters surrounding Lampung Bay provided the Bekre fish used in the study. The study's findings demonstrated that bekre fish have a negative allometric growth trend. The value of the condition factor falls between 0.631 and 0.966. Fishing mortality (F) is 3.46 per year, total mortality (Z) is 4.59 per year, and exploitation rate (E) is 0.75 per year. The natural mortality value (M) of bekre fish is 1.13 per year, as are the values of the growth parameters of bekre fish, specifically Linf of 456 mm, growth coefficient (K) of 1.51 per year, and t0 of -0.049. March and October saw the highest bekre fish recruitment rates in Lampung Bay's waters, with 32.55% and 9.04%, respectively
The Effect of Combined Aren Palm Sap and Molasses as Carbon Sources on the Growth and Survival of Vannamei Shrimp (Litopenaeus vannamei)
Get PDFVannamei shrimp (Litopenaeus vannamei) is one of the most widely cultivated aquaculture commodities due to its high market demand and ability to grow intensively. However, intensive systems often generate environmental issues, especially from excess feed and ammonia waste. This study aimed to determine the best combination of aren palm sap and molasses as organic carbon sources in fermented feed to improve the growth and survival of L. vannamei. The research was conducted over 45 days using an experimental method and a completely randomized design (CRD) consisting of six treatments and three replications, totaling 18 experimental units. The treatments included: P1 (control feed), P2 (feed + 10 ml/kg aren sap), P3 (feed + 10 ml/kg molasses), P4 (5 ml/kg aren sap + 5 ml/kg molasses), P5 (2.5 ml/kg aren sap + 7.5 ml/kg molasses), and P6 (7.5 ml/kg aren sap + 2.5 ml/kg molasses). The research included feed fermentation, shrimp rearing, water quality monitoring, and sampling. The best results were observed in treatment P5, which yielded the highest protein content in feed (32.98%), total bacteria (1,249,000 CFU), absolute weight gain (4.48 g), length gain (5.8 cm), specific growth rate (7.84%/day), feed efficiency (79.88%), and lowest feed conversion ratio (1.25). The combination of 2.5 ml/kg aren sap and 7.5 ml/kg molasses is recommended to enhance shrimp growth and feed utilization without negatively impacting water quality
Design And Performance Analysis of a Solar-Powered Boost Converter with Inductor Variations Controlled by Arduino Uno
Get PDFThis research designs and makes an analysis of the performance of a solar panel-based DC-DC boost converter topology using an Arduino Uno microcontroller. Boost converter is given a variation of inductor wire with 30 turns and 60 turns using a diameter of 1 . This research was conducted to obtain the highest characteristics and efficiency of the performance of the boost converter that has been designed and made for each inductor wire turn variation. In this research, data analysis will be carried out, namely the effect of duty cycle on voltage and current, and how the effect of variations in the number of inductors turns on the efficiency of the boost converter. This circuit uses an arduino uno microcontroller to generate and control the duty cycle on pulse width modulation (PWM) to regulate and increase the desired output voltage. The inductor on the DC-DC boost converter with a wire variation of 60 turns at a diameter of 1 gets the highest efficiency with an average efficiency of 67.13 , while the inductor wire with 30 turns gets an average efficiency of 66.32 . The maximum voltage generated by the solar panel used as the main source of electrical energy in the boost converter is 20.0 and the control system that has been applied to the arduino uno microcontroller can control and generate a duty cycle with a ratio of 0 - 90 . The boost converter circuit made gets low efficiency due to the presence of MOSFET components that work in non-ideal conditions, which causes excessive power losses
Gender Differences in Metacognitive Awareness: A Study on Pre-Service Physics Teachers
Get PDFThis research aims to analyze gender-based differences in metacognition awareness among pre-service physics teachers. The research sample consisted of 55 first semester active students selected using cluster random sampling. Data were collected using the Metacognitive Awareness Inventory (MAI) questionnaire and analyzed by independent t-test, which showed a significant difference (p = 0.000) between females (78.31) and males (70.26) students. Females score higher in Procedural Knowledge, while males were higher in Debugging Strategies. However, both had the lower score on Information Management Strategies, indicating difficulty in managing information during learning. These findings provide important implications in designing teaching strategies that are more suitable to the differences in metacognitive awareness between males and females, which can have an impact on learning outcomes that can support students' awareness in learning and thinking more effectively
Development of e-Module Using Problem-Based Learning Model Assisted by Heyzine Flipbook on Static Fluid Topic for Senior High School Students
Get PDFThis study aims to develop a valid and practical problem-based learning e-module using Heyzine Flipbook to enhance student understanding of static fluid concepts. This study employed the Research and Development (R&D) methodology using the 4D Model. The participants included expert validators, consisting of media experts, material experts, practitioners, and fifty eleventh-grade students from various high schools. Data were collected through validation instruments and student response questionnaires, and the results were analyzed descriptively. The findings revealed that the developed e-Module fulfilled the criteria of being highly valid and practical. Media expert validation achieved an average score of 85%, while material expert validation obtained a score of 83.5%, indicating that the e-Module is suitable for use. Student responses to the e-Module were overwhelmingly positive, with a practicality score of 88%. This study suggests that PBL-based e-Modules can serve as an effective alternative learning medium to promote interactive learning and enhance the quality of physics education. Future research should focus on evaluating the effectiveness of this e-Module on a larger scale and further exploring its application in teaching static fluid concepts
Meningkatkan Respons Cepat terhadap Stroke melalui Pelatihan Code Stroke bagi Tenaga Medis di Lombok Tengah
Get PDFStroke merupakan penyebab utama kematian dan kecacatan di Indonesia. Penanganan cepat sangat penting untuk mengurangi dampak stroke. Untuk itu, pelatihan Code Stroke bagi tenaga medis di Lombok Tengah diselenggarakan guna meningkatkan pengetahuan dan keterampilan dalam respons cepat terhadap stroke. Pelatihan ini melibatkan 170 tenaga medis dari berbagai fasilitas Kesehatan di Lombok Tengah dan mencakup materi teori tentang pengenalan gejala stroke serta protokol Code Stroke, yang dilanjutkan dengan simulasi praktis. Hasil pelatihan menunjukkan peningkatan kemampuan peserta dalam mengenali gejala stroke dan melakukan intervensi tepat waktu. Peserta juga merasa lebih percaya diri dan efisien dalam menangani kasus stroke. Pelatihan ini terbukti efektif dalam meningkatkan respons cepat dan diharapkan dapat mengurangi angka kematian dan kecacatan akibat stroke di Lombok Tengah
Hubungan Kemampuan Pemecahan Masalah Matematika dengan Self Efficacy Siswa Kelas VIII di SMP Negeri 1 Kabila
Get PDFThis study aims to identify whether there is a relationship between mathematical problem solving ability and self efficacy of VIII grade students at SMP Negeri 1 Kabila. The subjects in this study were students of class VII-D as many as 30 students. The method used in this research is a type of correlation research with a survey method using a quantitative approach and the correlation test used is the Pearson correlation test.. The technique used to analyze the data is correlation to determine the relationship between mathematical problem solving ability and self efficacy. The instruments in this study were mathematical problem solving ability test questions and non-tests in the form of self efficacy questionnaires. The results showed that there was a positive correlation between self efficacy and problem solving ability, where self efficacy contributed to problem solving ability by 45.36%.Penelitian ini bertujuan untuk mengidentifikasi apakah terdapat hubungan antara kemampuan pemecahan masalah matematika denagn self efficacy siswa kelas VIII di SMP Negeri 1 Kabila. Subjek dalam penelitian ini adalah siswa kelas VII-D sebanyak 30 orang siswa. Teknik yang digunakan untuk menganalisis data adalah uii korelasi untuk mengetahui hubungan antara kemampuan pemecahan masalah matematika dengan self efficacy. Instrumen dalam penelitian ini yaitu soal tes kemampuan pemecahan masalah matematikaa dan non tes berupa angket self efficacy. Hasil penelitian menunjukkan bahwa ada korelasi yang positif antara kemampuan pemecahan masalah dengan self efficacy, Dimana self efficacy memberikan kontribusi terhadaap kemampuan pemecahan masalah sebesar 45,36%
Identifikasi Kesalahan Mahasiswa dalam Menyelesaikan Soal Induksi Matematika pada Analisis Real: Perspektif Teori Kastolan
Get PDFThis study aims to identify and analyze the types of errors made by students in solving Mathematical Induction problems using Kastolan's theory. The analysis results are expected to clarify the specific difficulties faced by students and serve as a basis for improving the quality of mathematics education at the higher education level. This research employs a descriptive qualitative approach with ten sixth-semester students from the Mathematics Education Study Program at Universitas Negeri Medan as subjects. Data were collected through written tests, interviews, and documentation, and analyzed using the Miles and Huberman model, which includes data reduction, data display, and conclusion drawing. The results show that students made three main types of errors: procedural errors (50%), technical errors (27.27%), and conceptual errors (22.72%). Procedural errors were the most dominant, indicating a lack of understanding of the systematic steps required in inductive proofs. The primary cause of these errors was the students' insufficient comprehension of mathematical induction material during lectures. Therefore, a learning approach that emphasizes understanding logical structures and proof procedures is necessary to enhance the quality of mathematics instruction in higher education.Penelitian ini bertujuan untuk mengidentifikasi dan menganalisis jenis-jenis kesalahan yang dilakukan mahasiswa dalam menyelesaikan soal Induksi Matematika menggunakan teori Kastolan. Diharapkan hasil analisis ini dapat memperjelas titik-titik kesulitan yang dihadapi mahasiswa serta menjadi dasar peningkatan mutu pembelajaran matematika di jenjang pendidikan tinggi. Penelitian ini menggunakan pendekatan kualitatif deskriptif dengan subjek sepuluh mahasiswa semester VI Program Studi Pendidikan Matematika Universitas Negeri Medan. Data diperoleh melalui tes tertulis, wawancara, dan dokumentasi, kemudian dianalisis menggunakan model Miles dan Huberman yang mencakup reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa terdapat tiga jenis kesalahan utama yang dilakukan mahasiswa, yaitu kesalahan prosedural (50%), kesalahan teknikal (27,27%), dan kesalahan konseptual (22,72%). Kesalahan prosedural merupakan jenis kesalahan paling dominan, yang mencerminkan lemahnya pemahaman mahasiswa terhadap tahapan sistematis dalam pembuktian induktif. Faktor utama penyebab kesalahan adalah belum dipahaminya materi induksi matematika secara mendalam dalam perkuliahan. Oleh karena itu, diperlukan pendekatan pembelajaran yang lebih menekankan pada pemahaman struktur logika dan prosedur pembuktian untuk meningkatkan kualitas pembelajaran matematika di perguruan tinggi
The Agricultural Insurance: Explore Trends and Advances Over the Last Two Decades
No full textThe agricultural sector faces major risks due to extreme climate change, market uncertainty and economic fluctuations, which can destabilize global food production. Agricultural insurance, despite its importance as a risk mitigation tool for farmers, still has limited article reviews compared to other insurance sectors such as health, life, and property. This study aims to conduct a bibliometric analysis of global research on agricultural insurance over the past two decades, focusing on publication trends, the most influential countries and journals, keyword analysis, and providing directions for future research. The study used data from Scopus with a total of 643 documents. Analysis was conducted using VOS viewer, RStudio, and Tableau to visualize collaboration patterns, dominant keywords, and global publication trends. The analysis shows a significant increase in the number of studies on agricultural insurance, which reinforces the urgency of insurance in supporting global food stability. The implications of this research point to the need to develop insurance models that are technology-based and more adaptive to climate change, especially to expand access for smallholder farmers in developing countries. Recommendations for future research are to strengthen cross-sector collaboration and technological innovation to support the sustainability and resilience of the agricultural sector in the future
Analisis Pemahaman Mahasiswa Terhadap Konsep Interval Dalam Mata Kuliah Analisis Real
Get PDFThis study aims to analyze students' understanding of the concept of interval in the Real Analysis course, particularly in understanding the properties of intervals, such as supremum, infimum, and nested intervals. The research method used is a qualitative descriptive approach with a case study. Data were collected through proof-based essay tests, semi-structured interviews, and participant observation during the learning process using GeoGebra 3D AR. The sample consisted of 35 fourth semester students from the Mathematics Education program enrolled in the Real Analysis course. Data analysis was carried out with a thematic approach based on the APOS theory (Action, Process, Object, Schema). The results showed that most students struggled to transfer the visual understanding obtained through GeoGebra 3D AR into formal proofs. While 68.6% of students showed an improvement in visual understanding, only 8.5% could formally prove the property of nested interval intersections. The implications of this study highlight the importance of integrating interactive technology with deeper proof exercises, as well as the application of problem-based approaches to enhance understanding of the interval concept. The limitations of this study include the small sample size and the focus on one type of learning technology. Future research is recommended to explore the use of other technologies and more varied teaching methods