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: Gambaran Kecernaan Pakan Ayam Broiler yang diberi Testosteron dengan Dosis Bertingkat
Abstrak: Testosterone is one of the anabolic hormone that can trigger the growth of muscle mass as well as develop and maintain bone. Testosterone hormone can stimulate secretion of other hormones such as growth hormone. This research was conducted to describe the administration of testosterone hormone with multilevel concentration on broiler chicken’s feed digestibility through feces analysis. Fourteen days of twenty broiler chickens were used in this experiment, with 4 groups (K, T1, T2, and T3). K was control groups, T1, T2, and T3 were broiler chicken which given 1, 2, and 4 mg testosteron respectively. Feces is waste of metabolism which can be used for proximate analysis. Feed digestibility values was obtained from the difference percentage between the value of proximate analysis of feed and feces which divided by the value of the proximate analysis of feed. The highest digestibility values of fat (79.20%), protein (65.37%), and carbohydrates (69.79%) was in T3 groups. Therefore administration of 4 mg testosterone could increase the body weight.
Keyword: digestibility, feces, hormones, proximate, 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.
Keyword: