EKSAKTA: Berkala Ilmiah Bidang MIPA http://eksakta.ppj.unp.ac.id/index.php/eksakta <p>EKSAKTA&nbsp;<em>Berkala Ilmiah Bidang MIPA</em>&nbsp;&nbsp;is an open access journal and peer-reviewed that publishes either original article or reviews. The journal is dedicated towards dissemination of knowledge related to the advancement in scientific research. The prestigious interdisciplinary editorial board reflects the diversity of subjects covered in this journal. Under the realm of science and technology, the coverage includes environmental science, pure and applied mathematics, agricultural research and engineering, biology, biotechnology, bioinformatics, Healthcare sciences (including clinical medicine, preventive medicine &amp; public health), physics, biophysics, computer science, chemistry and bioengineering, to name a few. This Journal Is Published at 6 Month intervals On April and October</p> Pusat Kajian Matematika dan Ilmu Pengetahuan Alam, Fakultas MIPA Universitas Negeri Padang en-US EKSAKTA: Berkala Ilmiah Bidang MIPA 1411-3724 Modeling of Human Development Index Using Ridge Regression Method http://eksakta.ppj.unp.ac.id/index.php/eksakta/article/view/134 <p>This article aims to model factors affecting HDI (Human Development Index) in North Sumatera by 2015 using ridge regression method. This ridge regression method is used because in the IPM data there is a multicolinearity problem so that the least squares regression method, as regression method commonly used in statistical modeling, is not suitable for use any more. This study compares the models resulting from the use of the least squares method and the ridge regression method to the HDI data. This study proves that the ridge regression method produces a better model and can eliminate the multicolinearity effect, while the least squares method can not. The significant factors in affecting HDI on North Sumtera data in 2015 are Average School length and Total expenditure / capita / month. The indicator of the goodness of this ridge regression model is 81.81% which means that the model is good and could be accepted.</p> Ferra Yanuar Mardha Tillah Dodi Devianto ##submission.copyrightStatement## 2018-10-30 2018-10-30 19 2 1 11 10.24036/eksakta/vol19-iss2/134 Analysis of Nepenthes Hybrids in Bukik Taratak West Sumatra by RAPD Technique http://eksakta.ppj.unp.ac.id/index.php/eksakta/article/view/137 <p>The Study about Analysis of <em>Nepenthes</em> Hybrids in Taratak Hill, Pesisir Selatan Sumatera Barat by RAPD Technique had been conducted from May until November 2011. The study was done to prove natural hybrids of <em>Nepenthes</em> by RAPD technique and to determine the relationship of natural hybrids of Nepenthes with both parental. The research method is survey and observation. Isolation of DNA carried by CTAB method with modifications and amplification carried out by PCR. Hybrids and parental relationship was obtained from Jaccard similarity coefficient and displayed in a Dendogram (family tree) and PCO analysis to look genetic variation was processed with the program PAST 2.10. Proof of the natural hybrid <em>N. ampullaria × N. mirabilis</em> can be done by the RAPD technique using the primers OPA 15, OPK 16, OPK 19 and OPP 15. Natural hybrids between <em>N. ampullaria × N. gracilis</em> using the primers OPA 15, OPK 19 and OPP 15. The eighth of natural hybrids <em>N. ampullaria × N. mirabilis</em> were closer to <em>N. mirabilis</em>, while both natural hybrids<em> N. ampullaria × N. gracilis</em> closer to the <em>N. Ampullaria.</em></p> Weni Enjelina Mansyurdin Mansyurdin Tesri Meideliza ##submission.copyrightStatement## 2018-10-30 2018-10-30 19 2 12 20 10.24036/eksakta/vol19-iss2/137