Judul: Gambaran kecernaan pakan ayam broiler yang diberi testosteron dengan dosis bertingkat
Abstrak: Testosteron merupakan salah satu hormon anabolik yang dapat memicu pertumbuhan massa otot serta mengembangkan dan memelihara tulang.Hormon testosteron mampu merangsang sekresi hormon lain seperti growth hormone. Penelitian ini bertujuan untuk mempelajari pengaruh penambahan hormon testosteron dengan konsentrasi bertingkat pada ayam broiler terhadap kecernaan pakan melalui analisis feses. Penelitian ini menggunakan dua puluh ayam broiler berumur 14 hariyang dibagi dalam 4 grup (K, T1, T2, dan T3). K adalah kelompok kontrol, T1, T2, dan T3 ayam broiler yang dilakukan pemberian 1, 2, dan 4 mg testosteron. Feses yang merupakan eksresi hasil metabolisme diambil dari setiap perlakuan untuk dilakukan analisa proksimat. Nilai kecernaan pakan didapat dari persentasi selisih nilai analisa proksimat pakan dengan feses dibagi nilai analisa proksimat pakan. Nilai kecernaan paling tinggi pada kadar lemak kasar (79.20%), protein (6.37%), dan BETN (69.79%) ada pada kelompok T3. Oleh karena itu, pemberian 4 mg testosteron dapat meningkatkan bobot badan
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Digestibility, Feces, Hormones, Proximate, Testosterone

Judul: Performa ayam broiler yang diberi hormon testosteron dengan dosis bertingkat
Abstrak: Testosterone is a hormone that has an important role in secondary sex characteristics. Testosterone was known as androgenic and anabolic hormone. This research used testosterone to observe the performance of broiler chickens. Fourty four broiler chickens 15 days old were divided into 4 groups: K (control), T1 (dose 1 mg), T2 (dose 2 mg), and T3 (dose 4 mg). Parameters measured were body weight, feed and water consumption, feed conversion ratio (FCR), and mortality. The results showed that testosterone dose 1 and 4 mg could increase the daily body weight gain significantly (p<0.05) in broiler chickens aged between 15 and 18 days old. Testosterone dose 2 mg could increase the daily body weight gain significantly (p<0.05) in broiler chickens aged between 21 and 24 days old. Final weight, the amount of feed and water consumption, feed conversion ratio (FCR), and mortality of chickens given testosterone did not show any difference compare with control.
Keyword: broiler, daily body weight gain, FCR, final weight, testosterone

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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