Judul: Persentase Karkas dan Potongan Komersial Ayam Broiler yang Diberi Pakan Mengandung Bungkil Inti Sawit dengan atau tanpa Penyaringan
Abstrak: The aim of this research was to study percentage carcass and commercial cut of broiler fed diet containing screened or unscreened palm kernel meal (PKM). Two hundred day old chicks (DOC) of broiler strain Hubbard were used and kept for 35 days. The diet treatments were R1 = diet containing unscreened PKM, R2 = diet containing screened PKM, R3 = diet containing screened PKM plus shell of PKM as grit, and R4 = diet containing screened plus commercial grit in completely randomized design with four treatments and four replications. Water and diet were given ad libitum. The results showed that there were significantly different (P<0.05) among treatments on the final body weight and carcass weight where broiler fed R1 and R4 were higher body weight and carcass weight than those broiler fed R2 and R3. Percentage carcass, commercial cut and abdominal fat were not significantly different all on all PKM diets. It was concluded that screening PKM did not affect percentage carcass and commercial cut of broiler.
Keyword: shell, screened, palm kernel meal, carcass, broiler, abdominal fat

Judul: Performa Ayam Broiler yang Diberi Pakan Mengandung Bungkil Inti Sawit dengan atau tanpa Penyaringan
Abstrak: Palm kernel meal (PKM) is a by-product of oil extractions of palm kernel. The use of PKM in the ration of monogastric animals is limited as a result of high fibre. The main objective of this study was to evaluated the performance of broiler fed diet containing PKM with or without screening. Two hundreds DOC were divided into 20 groups and assigned to one of four diet treatment i.e : P1 = treatment diet + 7.5% PKM without screening and adding grit; P2 = treatment diet + 7.5% screened PKM without adding grit; P3 = treatment diet + 7.5% screened PKM + 2% shell of PKM; P4 = treatment diet + 7.5% screened PKM + 2% commercial grit. Data from completely randomized design were analyzed variance (ANOVA). Feed and water were given ad libitum. The result showed that screened palm kernel meal decreased crude fibre (from 33.13% to 30.58%). However, screened PKM did not affect feed intake, body weight gain, and feed conversion. It is concluded that PKM with ot without screening did not affect broiler performance.
Keyword: shell, screened, performance of broiler, palm kernel meal

Judul: Analisis Kestabilan Model Virus Komputer dengan Infeksi Tunda dan Pemulihan Tunda.
Abstrak: In this paper, a dynamical model is composed of computer virus model that considers time delay of infection and recovery processes. Stability analysis is performed to both models, i.e. the models with and without time delay. The model without time delay has two fixed points, which one of them is stable and the other is unstable. On the other hand, the model with time delay has fixed points which one of them is spiral stable. If the value of time delay is sufficiently large, then it will imply the stability changes from spiral stable to spiral unstable and subsequently the appearance of limit-cycle and Hopf bifurcation.
Keyword: computer virus model, Hopf bifurcation, time delay