Judul: Quality of Broiler Feed Pellets Made from Azolla pinnata with the Addition of Adhesives
Abstrak: Azolla pinnata merupakan jenis tanaman paku-pakuan yang tumbuh diair dengan kandungan protein yang tinggi. Berdasarkan penelitian sebelumnya, pemberian tepung Azolla 5% dalam pakan ayam pedaging fase starter dan finisher mampu meningkatkan pertambahan bobot badan dan menurunkan nilai Feed Convertion Ratio (FCR). Tepung Azolla yang digunakan adalah 5% dari total ransum dan binder yang digunakan sebanyak 2%. Rancangan percobaan dalam penelitian ini adalah Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 4 ulangan dengan masing-masing P1: pellet Azolla non binder; P2: pellet azolla + tepung tapioka 2%; P3: pellet Azolla + onggok 2%; P4: pellet azolla + Carboxymethil cellulose (CMC) 2%. Penggunaan tepung tapioka dan onggok mampu meningkatkan kualitas fisik pelet dengan hasil Pellet Durability Index masing-masing bernilai 86,35±0,83% dan 90,91±0,75%, serta hardness masingmasing bernilai 10,01±1,25 Psi dan 10,18±0,92 Psi. Penggunaan onggok sebagai bahan perekat dengan harga Rp 2000 per kg sangat ekonomis dikarenakan mampu meningkatkan kualitas fisik pellet., Azolla pinnata is a type of fern that grows in water with high protein content. Based on previous research, giving 5% Azolla flour in broiler feed for starter and finisher phases was able to increase body weight gain and reduce the value of Feed Conversion Ratio (FCR). Azolla flour used was 5% and the binder used was 2%. The experimental design in this study was a Completely Randomized Design (CRD) with 4 treatments and 4 replications with each P1: non-binder Azolla pellets; P2: azolla pellet + 2% tapioca flour; P3: azolla pellet + 2% pile; P4: azolla pellet + Carboxymethyl cellulose (CMC) 2%. The use of tapioca flour and onggok can improve the physical quality of the pellets with the results of the Pellet Durability Index being 86.35±0.83% and 90.91±0.75%, and the hardness being 10.01±1.25 Psi and 10.18±0.92 Psi. The use of onggok as an adhesive at a price of Rp. 2000 per kg is economical because it can improve the physical quality.
Keyword: Azolla pinnata, Binder, Pellets, Onggok, Tapioca flour

Judul: Pengaruh Tepung Garut, Ubi Jalar, dan Onggok Sebagai Bahan Perekat Alami Pelet Terhadap Kualitas Fisik Pakan dan Performa Ayam Broiler
Abstrak: Binder is a substance that has the function to bind the feed component in the form of pellets so that its structure remains compact. The purpose of this research was to know the effect of addition of garut flour, sweet potato flour, and onggok as natural binder for pellet on physical quality of feed and performace of broiler chickens. Completely Randomized Design was used in this experiment, using 4 treatments and 3 replications on physical quality feed, and 4 treatments and 4 replications on performance of broiler. The treatments were R1 = control without binder, R2 = addition of onggok 2%, R3 = addition of sweet potato flour 2%, R4 = addition of garut flour 2%. The data were analyzed using Analysis of Varience (ANOVA) and significant results were further tested using Duncan’s Multiple Range Test. The results showed that addition of onggok 2% in feed influenced (P<0.05) angle of repose (26.30°) and pellet durability index (98.35%), but the treatments in terms did not influence the performance of broiler chickens. The conclusion of this experiment was that onggok 2% as binder yielded the best pellet quality of broiler chickens. The treatments did not influence the performance of broiler chickens. Addition onggok 2% as binder yielded the highest value of IOFCC (Rp. 2337.82/bird)
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Judul: Tinjauan Matematis pada Model Makroskopik dan Mikroskopik Arus Lalu-lintas
Abstrak: Traffic flow phenomenon can be described through mathematical model such as continuous dynamic model with an ordinary differential equation so that it can be solved with integral factors. In this paper three simple models of traffic flow are discussed, i.e, two macroscopic and one microscopic models. Macroscopic model formulates dynamics of the traffic flow that occurs on a large number of vehicles on a road. While the microscopic model explains drivers’ behavior in their interaction with other vehicles ahead, i.e, car-following model. This paper shows the existence of ordinary differential equation found in the traffic flow model and indicates some different representations in the context of the same model. It also reviews a simple model of traffic flow along a single link, which leads to some unexpected results, i.e, it can express the solution model in term of link outflows as well as trip time. In the microscopic model, simulation is done to illustrate the behavior of the drivers with a sensitivity coefficient as a benchmark parameter.
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