Imamudin Imamudin
Universitas Dipoegoro

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MODEL DINAMIK PENULARAN HUMAN IMMUNODEFICIENCY VIRUS (HIV) Sutimin, Sutimin; Imamudin, Imamudin
JURNAL SAINS DAN MATEMATIKA Volume 17 Issue 1 Year 2009
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

ABSTRAK-Human Immunodeficiency Virus (HIV) adalah virus yang dapat merusak sistem kekebalan tubuh manusia Virus HIV dapat menyerang orang yang rentan ketika orang yang rentan itu melakukan kontak dengan penderita virus HIV hingga terinfeksi  virus HIV pada akhirnya dapat menderita AIDS atau seropositif non-AIDS. Dengan asumsi-asumsi tentang penularan virus HIV dapat diformulasikan suatu model matematika tentang perpindahan antar orang-orang rentan ke infeksi HIV, penderita AIDS dan seropositif non-AIDS. Model matematika yang menjelaskan penyebaran virus HIV dinyatakan dalam sistem persamaan differensial nonlinear, analisa kestabilan titik kesetimbangan dari model digunakan dengan metode Liapunov dan metode pelinearan untuk mengetahui kesetimbangannya  model. Kata  Kunci : HIV, AIDS dan Kestabilan.
PENGARUH BERBAGAI FREKUENSI PEMBERIAN PAKAN PADA PEMBATASAN PAKAN TERHADAP PRODUKSI KARKAS AYAM BROILER Imamudin, Imamudin; Atmomarsono, Umiyati; Nasution, Maulana Hamonangan
Animal Agriculture Journal Vol 1, No 1 (2012): Volume 1, Nomor 1, Tahun 2012
Publisher : Animal Agriculture Journal

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The research was aims to determine the influence of various feeding frequencies on feed restriction towards broiler chickens on carcass production. The experiment used 200 days old chick broilers unsex. Feed diet were calculated 22,69% crude protein; 2930 kcal/kg metabolizable energy. Design used in this research was Completely Randomized Design (CRD), with 4 treatments and 5 replications, so there were 20 cages as experiment units. Each experiment unit consisted of 10 brid. T0: ad libitum feeding according to PT. Charoen Pokphand standard. T1: feeding with 75% standard feed which is given 4 times a day, T2: feeding with 75% of standard feed which is given 3 times a day, T3: feeding with 75% of standard feed which is given twice a day. The carcass weight of broiler chickens on T0: 1378,6 g, T1: 1292,4 g, T2: 1294,4 g dan T3: 1295,4 g. The carcass percentage of broiler chickens on T0: 71,86 , T1: 70,89 , T2: 71,19 dan T3: 72,37 %. The carcass percentage cut portion breast of broiler chickens on T0: 35,17, T1: 37,24, T2: 35,35 dan T3: 36,14 %. The carcass percentage cut portion drumstick of broiler chickens on T0: 6,52, T1: 6,68, T2: 6,48 dan T3: 6,59 %. The carcass percentage cut portion thigh of broiler chickens on T0: 8,12, T1: 8,35, T2: 8,14 dan T3: 8,11 %. The carcass percentage cut portion wing of broiler chickens on T0: 5,46, T1: 5,42, T2: 5,83 dan T3: 5,51 %. The carcass percentage cut portion back of broiler chickens on T0: 11,97, T1: 11,86, T2: 11,66 dan T3: 11,56 %. The results showed that the influence of feeding frequency and feed restriction no significant effect (P> 0.05) on weight carcass, carcass percentage and carcass cut portionKey words: feed restriction, carcass weight, carcass percentage and carcass cut portion, broiler chicken