Analysis of Torque Vertical on String Model

Kusumastuti, Ari; Nurhayati, Sri Sasi Yuni

doi:10.11113/jt.v78.8335

Cited by 3 publications

(3 citation statements)

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“…Namun penggunaan fungisida sintetik yang berkepanjangan akan mengakibatkan kerusakan keseimbangan ekosistem dan kesehatan manusia. Alternatif yang dapat digunakan ramah bagi lingkungan yaitu dengan memanfaatkan esktrak tumbuhan (Nurhayati, 2011). Bahan alami untuk membuat fungisida alami dalam pengendalian jamur telah dikenal secara luas (Purwantisari et al, 2023).…”

Section: Pendahuluanunclassified

“…Sesuai penelitian Habibi et al, (2017), Kalium dapat meningkatkan hambatan tanaman dengan mengendalikan stomata dan membentuk senyawa lignin yang lebih tebal sehingga dinding menjadi lebih kokoh dan tahan terhadap infeksi. Sesuai pernyataan Nurhayati et al, (2011), bagian kalium merupakan sumber kekuatan tanaman dalam menghadapi musim kemarau dan penyakit, serta berperan penting dalam keseluruhan siklus metabolisme tanaman dan mengembangkan kekuatan tanaman. rangka agar tanaman lebih tahan terhadap penyakit.Jika, tanaman kekurangan unsur kalium, akan menganggu komponen ketahannanya yang menyebabkan patogen mudah untuk melakukan penetrasi.…”

Section: Keparahan Penyakitunclassified

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Effect Local Microorganisms Coconut Pulp in Increasing The Resistance of Red Chilli Plants To Fungus Colletotrichum acutatum J.H. Simmonds

Asrul Rusadi,

Yulianty,

Sri Wahyuningsih

et al. 2024

JBT

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The fungus Colletotrichum acutatum which often attacks chili plants causes anthracnose disease. Farmers generally use fungicides to control this disease. Continuous use of synthetic fungicides will have negative impacts. Plant extracts as an alternative to natural fungicides can be an appropriate and environmentally friendly choice. One of them is the use of Local Microorganisms (MOL). This research aims to determine the optimal concentration of coconut pulp MOL in increasing the resistance of red chilli plants to the fungus Colletotrichum acutatum that causes anthracnose disease. The study used a Totally Randomized Design (CRD) with 6 drugs, namely A (0 ml/water), B (5 ml/water), C (10 ml/water), D (15 ml/water), E (20 ml/water). ml/water), F (25 ml/water). There are four treatments each time. Information was broken down using ANOVA and continued with the Fair Genuine Contrast (BNJ) test at the 5% level (α = 5%). with a level of 5% (α = 5%). The results showed a significant effect on fungal colony diameter, germination period, plant height, plant incubation period, and disease severity. The best concentration of local coconut pulp microorganisms in inhibiting anthracnose disease was 25 ml/l water.

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Section: Pendahuluanunclassified

Section: Keparahan Penyakitunclassified

Effect Local Microorganisms Coconut Pulp in Increasing The Resistance of Red Chilli Plants To Fungus Colletotrichum acutatum J.H. Simmonds

Asrul Rusadi,

Yulianty,

Sri Wahyuningsih

et al. 2024

JBT

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“…Langkah selanjutnya yaitu melakukan analisis kestabilan. Hal ini bertujuan untuk mengetahui metode BTCS stabil atau tidak stabil [14]. Dalam penelitian ini akan dilakukan analisis kestabilan von Neumann dengan cara menyubstitusikan 𝑢 𝑗 𝑛 = 𝜆 𝑛 𝑒 𝑖𝑘𝑗ℎ , ∀𝑖 = √−1 [15] pada persamaan beda (3), sehingga diperoleh…”

Section: Analisis Kestabilan Metode Implisit Btcsunclassified

Metode Backward Time Central Space dalam Penyelesaian Model Matematika Vibrasi Dawai pada Alat Musik Petik

Damayanti

Kusumastuti

Hidayati

2022

JRMM

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This research was conducted to obtain a numerical solution of the mathematical model of string vibration on stringed instruments. This mathematical model is a representation of the phenomenon of string vibration on a stringed instrument subject to deviation. The model was constructed by Kusumastuti, et al (2017) and is in the form of a second-order partial differential equation. The method used in completing this research is the BTCS (Backward Time Central Space) method. The numerical solution is obtained by the following steps, 1). Discretize mathematical models, as well as discretize initial conditions and boundary conditions. 2). Performing stability analysis of numerical solutions to determine the terms of solution stability and conducting consistency analysis as a condition of the convergence of the obtained numerical solutions. 3). Simulate numerical solutions and perform graph interpretations. The results show that the numerical solution of the mathematical model of string vibration on stringed instruments is unconditionally stable and has an error order (〖∆x〗^2,〖∆t〗^3).

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An Analytical Study of Suspension Bridge Collapse Based on the Characteristics of the Eigen Values

Jufriansah,

Pramudya,

Lazwardi

et al. 2024

ESL

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This research discusses an analytical approach to suspension bridge accidents focusing on eigenvalue characteristics. This research uses eigenvalue analysis to explore patterns that may contribute to bridge structural failure. The analysis steps include reducing the model to an uncoupled and linear system, as well as determining homogeneous and non-homogeneous solutions, which helps identify accident-prone patterns. The analysis results also reveal significant differences in dynamic characteristics between safe bridges and those that experience accidents. This research highlights the importance of a deep understanding of eigenvalues in designing, maintaining, and managing suspension bridges. The implication of this research is the development of more effective prevention strategies to improve suspension bridge safety in the future. By analyzing eigenvalues, this research provides deep insight into the factors that influence the stability of suspension bridges. These findings provide a strong foundation for developing recommendations for more effective design, maintenance, and management of suspension bridges. The conclusions of this research can help improve the safety and reliability of suspension bridges worldwide and contribute to civil engineering and infrastructure security.

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Analysis of Torque Vertical on String Model

Cited by 3 publications

References 0 publications

Effect Local Microorganisms Coconut Pulp in Increasing The Resistance of Red Chilli Plants To Fungus Colletotrichum acutatum J.H. Simmonds

Effect Local Microorganisms Coconut Pulp in Increasing The Resistance of Red Chilli Plants To Fungus Colletotrichum acutatum J.H. Simmonds

Metode Backward Time Central Space dalam Penyelesaian Model Matematika Vibrasi Dawai pada Alat Musik Petik

An Analytical Study of Suspension Bridge Collapse Based on the Characteristics of the Eigen Values

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