Jurnal Penelitian Pendidikan IPA (Science Education Graduate Program University of Mataram)
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Physical and Mechanical Properties of White Teak Wood (Gmelina Arborea) from Ampana, Poso, Central Sulawesi Based on the Position of the Wood in the Trunk
No full textThe basic properties of this wood are also greatly influenced by factors within the wood and external factors such as where the wood grows. This research was conducted from June to September 2024 at the Soil Science Laboratory, Faculty of Agriculture, and the Mechanical Engineering Laboratory, Faculty of Engineering, Tadulako University to determine the physical and mechanical properties of white teak wood from Ampana, Poso, Central Sulawesi. The design method used in this study is RAL Factorial with two factors, namely: Factor A variation of the axial direction (base, middle, tip) and, Factor B variation of the radial direction (near the heart, middle, near the skin), so that there are 9 treatments and each treatment is repeated 5 times. The results of the study showed that both physical and mechanical properties were influenced by the position of the wood in the trunk where the position of the wood in the trunk affects the physical and mechanical properties of the wood studied. Based on the MOE value, the white teak wood studied is included in the strength class V. Based on the MOR value and compressive strength parallel to the grain, the wood studied is included in the strength class III which can be used as raw material for furniture and light construction
Growth and Yield of Corn with Different Animals Compost and Doses
No full textThe purpose of this study was to determine of solid organic fertilizer (POP) from three animals’ feces namely cow, goat, and chicken were applied with various dosages in maize to increase growth and yield. The study was used RCBD factorial with three reps and POP type (K1 = chicken K2 = cow and K3 = goat) was the first factor and the POP doses (D0 = 0.00; D1 = 0.75; D2 = 0.150; D3 = 2.25 and D4 = 3.00/ plot) was the second factor. Parameters measured were plant height, number of leaves, stem diameter, leaf area, cob length, cob diameter, number of rows, and cob weight. The results were showed significantly different for the type of POP, where the chicken POP was significantly with cow and goat POP, but t between goat and cow POP was no significant differently. The dosage was found, significantly difference among doses, but interaction between the dosage with the POP was no significant difference, respectively. The results indicated that, various compost from feces cow, goat and chicken were increased growth and yield of corn, but the better compost feces chicken as compare those ones. Especially in dosage, whereas all dosage were providing positive impact in growth and yield, but dose 2.25kg/plot was given high in growth and yield of corn
Structural Behavior and Performance Level of Reinforced Concrete Under the Cyclic Loads
No full textThis study evaluates the applicability of ASCE 41-17 and ATC-40 for assessing the performance of existing structures in Indonesia, where current regulations focus on force-based rather than displacement-based evaluation. The analysis results indicate that all displacement ratios remain below the target performance level for Risk Category 2 structures. Strength values of 1.8943 and 2.9624 for the x-axis and y-axis, respectively, were found to be lower than the maximum allowable values, confirming that the pushover analysis meets the required criteria. The formation of plastic hinges initially in beams and later in ground-floor columns validates the Strong Column–Weak Beam principle, ensuring structural ductility. The study suggests that the Pushover method can be applied to more complex structures with additional stories. Furthermore, SeismoStruct, in combination with other software, offers an efficient alternative for nonlinear static pushover analysis, optimizing computational resources. The findings highlight the potential adoption of ATC-40 and ASCE 41-17 in Indonesia’s structural assessment practices, enabling more accurate performance evaluations and enhancing seismic resilience. Future research should explore broader applications of these codes for various structural types to improve earthquake preparedness and mitigate potential risks.Evaluasi kinerja struktur eksisting menjadi salah satu pertimbangan untuk menentukan langkah yang tepat di kemudian hari ketika terjadi kegagalan struktur akibat bencana gempa bumi. Evaluasi terhadap struktur eksisting dengan objek penelitian gedung perkuliahan salah satu universitas negeri di Kabupaten Malang bertujuan untuk mengetahui apakah struktur eksisting jika terjadi bencana gempa bumi masih dapat mempertahankan fungsi dan kekuatannya. Struktur tersebut masuk dalam klasifikasi tanah sedang dan mempunyai 8 lantai, sehingga struktur tersebut harus diperhatikan apabila terjadi kegagalan struktur. Analisis yang digunakan antara lain menggunakan metode performance based design yang sudah familiar di kalangan desainer struktur untuk menilai kinerja dan menilai kekuatan struktur menggunakan analisis statik pushover. Berdasarkan hasil analisis drift menurut metode ATC-40 diperoleh bahwa struktur berada pada tingkat keselamatan jiwa, yang mana menurut ASCE 41-17 untuk struktur eksisting dengan resiko gempa sebesar 4 maka struktur maksimum tingkat kinerjanya berada pada Life Safety
Road Defect Assessment Algorithm on Flexible Pavement
No full textThis study aims to examine the condition of road pavement mechanically which requires large, time-consuming, impractical, and can only identify one type of road damage. The development of digital technology, then identifying the type of damage can be done with an algorithm or method to detect and analyze the type of road damage quickly and accurately. The purpose of the study is to identify the value of road damage with the visual method of Dirgolaksono and Mochtar, create a model of a road damage assessment algorithm based on digital imagery, and apply the digital image method to the road section being reviewed. The research method with the initial step of the algorithm process is taking pictures using a type of digital camera, so that a digital image is produced which is then processed using Matlab R2016a. The results obtained are the classification of road damage and the damage value of the road section obtained by visual road damage and digital imagery accurately. Validation is carried out with a strong correlation between visual and digital damage, which means that there is no difference between the visual damage value and the digital image damage valu
Integration of Virtual Reality in STEM to Enhance Problem Solving Skills in Science Learning in the 21st Century: A Review
No full textOne of the most exciting innovations today is Virtual Reality. VR simulations expand the variety of real-world applications for students to explore, Virtual reality with STEM Approach is important to encourage students to actively seek or explore information and solve learning problems creatively, while thinking critically about the phenomena they encounter. For this reason, this study aims to examine the Integration of Virtual Reality in STEM to improve problem-solving skills in science learning in the 21st century: A Review. This review was conducted based on the review method. The results of this study explain about Benefits of VR in Education: Immersive Learning, Safe Practice Simulations, Enhanced Conceptual Understanding, Enhanced Creativity, Access to Global Experiences, Adaptation to Different Learning Styles, Collaborative Learning, Increased Learning Retention, More Effective Distance Learning ; 4 aspects in STEM : Science, Technology, Engineering, Mathematics formulate problems, solve problems and interpret solutions to mathematical problems in applying various different situations; The Role of Virtual Reality in Enhancing Problem-Solving Abilities in Science Education for the 21st Century : Visualizing Complex Ideas and Data, Collaborative Learning and Global Connections, Immersive Experiences and Real-World Simulations, Equitable Access and Inclusivity in STEM Education, Challenges and Considerations for Implementing VR in STEM Learning
Management Of Skills Competency Tests (Ukk) In State Vocational High Schools
No full textVocational education aims to equip students with skills aligned with industry demands. Competency Certification (UKK) is a key assessment to evaluate students’ readiness in Vocational High Schools (SMK). This study examines the management of UKK in SMK Negeri across Malinau Regency, focusing on planning, execution, and evaluation. Using a qualitative multi-site approach, the research involves school stakeholders, 12th-grade students, and examiners as key informants. The findings indicate that UKK implementation follows a structured process supported by industry collaboration. Supervision adheres to national guidelines, though a standardized fraud reporting system is lacking. Key challenges include student delays and limited equipment, while resource optimization and long-term projects serve as supporting factors. The study highlights the need for infrastructure improvements and enhanced supervision to ensure graduates meet industry standards, ultimately strengthening the quality of vocational education and workforce readiness
Optimalisasi Poliakrilamida Anionik sebagai Agen Pengendap untuk Mengurangi Ion Tembaga yang Efektif dalam Pengolahan Air Limbah Laboratorium Pendidikan
No full textThis research highlights the potential of anionic polyacrylamide as a main treatment agent for liquid waste from educational laboratories, particularly in the removal of copper ions. This study using experiment with varies the concentration of anionic polyacrylamide with 3, 5, and 7% weight per weight. The initial concentration of copper in liquid waste was very high ranging between 600 mg/L. The findings indicate that the application of anionic polyacrylamide in wastewater treatment significantly reduces the concentration of copper ions, especially in wastewater from educational laboratories. Specifically, anionic polyacrylamide, at a concentration of 3% w/w, effectively removed almost all copper ions from the wastewater found in analytical chemistry laboratory and also achieved the quality standard of treated wastewater for copper parameter. The pH of the treated wastewater is critical in determining the overall effectiveness of the treatment, with a higher pH resulting in more effective coagulation of copper ions. The effectiveness of the treatment is influenced by the pH of the wastewater and the concentration of the polyacrylamide used. Further studies are needed on other types of heavy metals that can be coagulated using this method in order to gain a more comprehensive understanding
Tingkat Kesiapsiagaan Siswa dalam Menghadapi Bencana Banjir di SMA Negeri 1 Perhentian Raja Kabupaten Kampar Provinsi Riau
No full textFloods are one of the natural disasters that often occur in Indonesia, including in Riau Province. Kampar Regency, especially the Perhentian Raja area, is one of the areas prone to flood disasters. caused by the morphological and physical conditions of the area which is dominated by lowlands and surrounded by large rivers such as the Kampar and Siak rivers and other rivers in Kampar Regency. This research aims to 1). Knowing the impact of the flood disaster at SMA Negeri 1 Perhentian Raja, Kampar Regency, Riau Province. 2). Analyzing the level of preparedness of students facing flood disasters at SMA Negeri 1 Perhetian Raja, Kampar Regency, Riau Province, 3). Formulating a strategy for developing students' preparedness for flood disasters at SMA Negeri 1 Perhentian Raja. This research was conducted using mixed research (Mix Methods) with quantitative and qualitative approaches, and using the AHP method (analytical Hierarchy Proces) to formulate strategies for developing student preparedness. Data collection using interviews, questionnaires, FGD (Focus group discussion), and analysis) . The research results show that 1). The impact of the flood disaster at SMA Negeri 1stop Raja showed a light impact on the physical and environmental aspects of the school. 2). The level of preparedness of students in facing flood disasters at SMA Negeri 1 Perhentian Raja was obtained using 5 parameters. The total number of parameters entered the average index of 86.4% in the very prepared category. 3). The strategy for developing students' preparedness to face flood disasters at SMA Negeri 1 Perhentian Raja uses the method Analytical hierarchy proces got 9 alternatives. This alternative was formulated to reduce the risk of flood disasters at SMA Negeri 1 Perhentian Raja.Banjir merupakan salah satu bencana alam yang sering terjadi di Indonesia, termasuk di Provinsi Riau. Kabupaten Kampar khususnya daerah Perhentian Raja merupakan salah satu daerah yang rawan terhadap bencana banjir. disebabkan oleh kondisi morfologi dan fisik wilayah yang didominasi oleh dataran rendah dan dikelilingi oleh sungai-sungai besar seperti sungai Kampar dan sungai Siak serta sungai-sungai lainnya yang ada di Kabupaten Kampar. Penelitian ini bertujuan untuk 1). Mengetahui dampak bencana banjir di SMA Negeri 1 Perhentian Raja Kabupaten Kampar Provinsi Riau. 2). Menganalisis tingkat kesiapsiagaan siswa menghadapi bencana banjir di SMA Negeri 1 Perhetian Raja Kabupaten Kampar Provinsi Riau, 3). Merumuskan strategi pengembangan kesiapsiagaan siswa menghadapi bencana banjir di SMA Negeri 1 Perhentian Raja. Penelitian ini dilakukan dengan menggunakan penelitian campuran (Mix Methods) dengan pendekatan kuantitatif dan kualitatif, serta menggunakan metode AHP (Analytical Hierarchy Proces) untuk merumuskan strategi pengembangan kesiapsiagaan siswa. Pengumpulan data menggunakan wawancara, kuesioner, FGD (Focus group discussion), dan analisis. Hasil penelitian menunjukkan bahwa 1). Dampak bencana banjir di SMA Negeri 1 Raja menunjukkan dampak yang ringan pada aspek fisik dan lingkungan sekolah. 2). Tingkat kesiapsiagaan siswa dalam menghadapi bencana banjir di SMA Negeri 1 Perhentian Raja diperoleh dengan menggunakan 5 parameter. Jumlah keseluruhan parameter tersebut masuk dalam indeks rata-rata 86,4% dengan kategori sangat siap. 3). Strategi pengembangan kesiapsiagaan siswa dalam menghadapi bencana banjir di SMA Negeri 1 Perhentian Raja menggunakan metode Analytical hierarchy proces diperoleh 9 alternatif. Alternatif ini dirumuskan untuk mengurangi risiko bencana banjir di SMA Negeri 1 Perhentian Raja
Analysis Characteristics Regional Biophysics Air, Water and Condition of North Konawe
No full textMining activities in North Konawe pose significant environmental challenges due to the exploration and exploitation of natural resources. This study aims to identify and analyze the sustainable efforts undertaken by PT. Sumber Bumiputera in monitoring and managing environmental impacts within its Mining Business License (IUP) area. A qualitative descriptive approach was applied, with data collected through field observations, interviews with stakeholders, and analysis of environmental documents from the company. The findings reveal that PT. Sumber Bumiputera has implemented several environmental management strategies, including land rehabilitation, waste management, and systematic monitoring of water and air quality. These efforts align with existing environmental regulations and aim to mitigate the negative impacts of mining activities. However, there are areas where improvements are necessary, such as enhancing community engagement, strengthening monitoring mechanisms, and increasing compliance with sustainability standards. Strengthening these aspects can contribute to more effective environmental management and long-term ecological balance. This research highlights the importance of continuous environmental monitoring and adaptive management strategies to minimize the adverse effects of mining operations while ensuring sustainable resource utilization
Community-Based Total Sanitation Practices in Families Suffering from Stunting in Raknamo Village, District Amabi Oefeto, Kupang Regency
No full textThe stunting rate in Raknamo village is the highest with a total of 45 cases. The research objectives are: Analyzing the relationship between community-based total sanitation (STBM) practices and the incidence of stunting and analyzing the STBM practice factors that are most dominant in their relationship to the incidence of stunting. Therefore, research on STBM practices is very important to find out STBM factors that are related to stunting so that efforts can be made to prevent and overcome stunting. Types of qualitative and quantitative descriptive research (mixed methods). This approach was chosen to understand complex phenomena related to community-based total sanitation (STBM) practices in families of stunting sufferers, identify factors that influence the implementation of STBM, analyze the level of knowledge and community sanitation practices in depth. Qualitative research reveals subjective aspects, people's perceptions of STBM, quantitative research provides an accurate numerical picture of existing conditions. The results show that the defecation habits of respondents in cases with a latrine are 27 (69%), and families who do not have a latrine but still share are 12 (31%). (69%) have a private latrine, but there are still 31% who do not have a latrine and use shared facilities or defecate in the garden. The CTPS practice of families of toddlers with stunting is still low, only 33% always do it, while 64% sometimes do it. All families of toddlers with stunting (100%) boil water before consuming it, but only 79% keep the water source clean