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Menampilkan 1–3 dari 3 artikel
Pengaruh Parameter Regularisasi (λ) terhadap Stabilitas Estimasi pada Regresi Ridge
Linda Rassiyanti
; Rohimatul Anwar
Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Vol 5
, No 1
(2026)
Multicollinearity is one of the common issues in multiple linear regression that can lead to instability in the estimation of regression coefficients. This study aims to examine the impact of multicollinearity on regression models and to evaluate the use of Ridge Regression as an alternative estimation method. The study employs simulated data consisting of 1,000 observations, including one dependent variable and four independent variables designed to exhibit high correlation. The analysis begins...
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Analisis Regresi Kernel Gaussian untuk Memprediksi Indeks Pembangunan Manusia (IPM) Berdasarkan Faktor Sosial-Ekonomi Provinsi di Indonesia
Rohimatul Anwar
; Linda Rassiyanti
; Rizka Pitri
Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Vol 4
, No 3
(2025)
The Human Development Index (HDI) functions as a key indicator for assessing the level of welfare and overall quality of life of the population within a specific region. This study aims to examine the socio-economic factors influencing HDI at the provincial level in Indonesia using a Gaussian kernel regression approach. A nonparametric method is employed due to its flexibility in capturing nonlinear relationships between the response and predictor variables without the need to assume a specific...
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Sample Preparation Technique for Scanning Electron Microscopy in Analyzing Shrimp Shell Biodegradation by Actinomycetes through Solid-State Fermentation
Widyastuti Widyastuti
; Annisa Ananda
; Rohimatul Anwar
; Kurniawan Shidiq
Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Vol 4
, No 2
(2025)
Shrimp shell waste is a chitin-rich biopolymer with high potential for microbial bioconversion into value-added products. This study aimed to analyze the microstructural degradation of shrimp shells by the actinomycete isolate 18D38A1 under solid-state fermentation, using Scanning Electron Microscopy (SEM). A fresh sample preparation method was applied, involving washing and immersion in 70% ethanol, followed by vacuum drying and gold sputter-coating. Fermentation was conducted over a period of...
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