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All Journal Journal of the Indonesian Mathematical Society Jurnal Ilmu Produksi dan Teknologi Hasil Peternakan
N. Nuraini
Industrial and Financial Mathematics Research Group, Faculty of Mathematics and Nat- ural Sciences, Institut Teknologi Bandung, Bandung 40132, Indonesia.
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Mathematics Veterinary

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A MATHEMATICAL MODEL OF DENGUE INTERNAL TRANSMISSION PROCESS Nuraini, N.; Soewono, E.; Sidarto, K.A.
Journal of the Indonesian Mathematical Society Volume 13 Number 1 (April 2007)
Publisher : IndoMS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22342/jims.13.1.79.123-132

Abstract

In this paper we formulate a mathematical model of internal process of dengue virus transmission in the human body. We analyze the dynamic of dengue virus using a system of differential equation. We obtain a local stability of equilibrium for this model base on a threshold parameter. In particular, we prove the stability result for a free-virus and abundance of virus-states. Finally, numerical simulation of the model are performed to study the behaviour of the system for a short period of time.DOI : http://dx.doi.org/10.22342/jims.13.1.79.123-132
Pendugaan Bobot Hidup Sapi Peranakan Ongole (PO) dan Sapi Pesisir Menggunakan Pencitraan Digital Riffiandi, N.; Priyanto, R.; Nuraini, N.
Jurnal Ilmu Produksi dan Teknologi Hasil Peternakan Vol. 3 No. 3 (2015): Jurnal Ilmu Produksi dan Teknologi Hasil Peternakan
Publisher : Department of Animal Production and Technology, Faculty of Animal Science, IPB University in associated with Animal Scientist's Society of Indonesia (HILPI)

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Abstract

This research aimed to estimate cattlelive weight by digital imageanalysis using two variables, namely side body surface area (LPTS) and back body surface area (LPTB). Thestudyused 40 heads of PO cattle and 45 heads Pesisir cattle. The body surface of cattle was visualized by digital camera and the image was analyse by autocad software. The combination of LPTS and LPTB was correlated to live weight of cattle with coefficient determinatoin (R2) of 70.57 % and 40.96 % for PO and Pesisir cattle respectively. The established regretion equation gave standard error of 51.63 kg for PO cattle and 25.54 kg for Pesisir cattle. Therefore, the estimation of cattle live weight based on LPTS and LPTB was not suggested as their hight prediction error.
Co-Authors E. Soewono K.A. Sidarto R. Priyanto Riffiandi, N.