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Journal : Journal of Mathematics UNP

Faktor-faktor yang Mempengaruhi Jumlah Kelahiran di Provinsi Sumatera Barat dengan Menggunakan Analisis Faktor Resti Febrina; Nonong Amalita; Dewi Murni
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626 KB) | DOI: 10.24036/unpjomath.v2i1.1959

Abstract

Abstract –– The Problem of birth is one of the unresolved issues in West Sumatra. The birth rate in western Sumatra in the high category, where a mother gives birth to an average of three to four childrens. Increasing the number of births means that population growth will affect the welfare of society. It required effort to see birth control factors affecting birth. To find out which factors that affect the number of births in the province of West Sumatra is used by factor analysis. Base on the results obtained the data analysis three factors that affect the number of births in the province of West Sumatra that women with low education or undergraduate, women who married at the end of adolescence, and women who are married under-age and use contraceptive.   Keywords –– Factor analysis, Problem of birth, and Number of birth.
Penggunaan Semivariogram pada Metode Ordinary Kriging untuk Mengestimasi Curah Hujan di Kabupaten Kuantan Singingi Esil Metra; Dewi Murni
Journal of Mathematics UNP Vol 8, No 2 (2023): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/unpjomath.v8i2.14724

Abstract

In a measurement of  rainfall data, not all points are gauges because of a limitation. So the Meteorology, Climatology and Geophysics Agency (BMKG) only builds rain gauge posts in areas considered to have potential and can represent the surrounding area. Given these limitations, a method is needed to estimate rainfall data outside the observation post area, namely a geostatistical method called ordinary kriging. Ordinary Kriging is a method for estimating a non-sampled value based on the sampled values around it. By using an experimental semivariogram model compared to several theoretical semivariograms (Exponential, Gaussian, and Spherical) and selecting one of the best semivariogram models to estimate the value to be searched, so that optimal estimation results are obtained. In this study, estimated rainfall in Kuantan Singingi Regency in February 2023 where the results obtained are the average rainfall in each sub-district, which is 220.3827 mm, while the estimated rainfall in each village is 217.180. So that Kuantan Singingi Regency is an area with moderate rainfall.