Judul: The Behavior of IPB-D1 Chickens with Different Sexes in the Free-Range
Abstrak: Segala aktivitas yang dilakukan ayam disebut tingkah laku. Tingkah laku yang diekspresikan ayam disebabkan faktor eksternal maupun internal. Penelitian ini bertujuan mempelajari tingkah laku ayam IPB-D1 jantan dan betina pada sistem pemeliharaan free-range. Data dianalisis menggunakan uji T untuk membandingkan rataan jumlah tingkah laku ayam IPB-D1 jantan dan betina. Variable yang diamati meliputi tingkah laku makan, minum, lokomosi, mandi debu, bertengger, mengais, dan agonistik. Hasil penelitian berbeda nyata (P<0,05) antara ayam IPB-D1 jantan dengan betina pada tingkah laku makan, lokomosi, mengais, dan agonistik di dalam kandang, serta berbeda nyata (P<0,05) pada tingkah laku makan, minum, lokomosi, dan agonistik di umbaran. Tidak ada perbedaan (P>0,05) antara ayam jantan dan betina pada tingkah laku minum dan bertengger di dalam kandang, serta tidak ada perbedaan (P>0,05) pada tingkah laku mandi debu dan mengais di umbaran. Ayam IPB-D1 di dalam kandang lebih banyak melakukan tingkah laku makan, sedangkan di umbaran lebih banyak melakukan tingkah laku lokomosi. Tingkah laku agonistik di dalam kandang maupun di umbaran lebih banyak dilakukan ayam IPB-D1 jantan daripada betina., All activities carried out by chickens are called behavior. The behavior expressed by chickens is caused by external and internal factors. This study aims to study the behavior of male and female IPB-D1 chickens in the free-range rearing system. Data were analyzed using the T-test to compare the average number of behaviors of male and female IPB-D1 chickens. The observed variables included eating, drinking, locomotion, dust bathing, perching, scratching, and agonistiic behavior. The results of the study were significantly different (P<0,05) between male and female IPB-D1 chickens in eating, locomotion, scratching, and agonistic behavior in the cage, and significantly different (P<0,05) in the behavior of eating, drinking, locomotion, and agonistic in the free-range. There was no difference (P>0,05) between male and female chickens on the behavior of drinking and perching in the cage, and there was no difference (P>0,05) in the behavior of dust bathing and scratching. IPB-D1 chickens in the cage did more eating behavior, while in free-range they did more locomotion behaviors. Agonistic behavior in the cage and in the free-range was mostly done by male IPB-D1 chickens than by females.
Keyword: Behavior, Free-Range, IPB-D1 Chickens

Judul: Evaluation of Feed Nutrient Adequacy in Free Range Maintenance System on IPB-D1 Chicken Composition
Abstrak: Sistem free-range merupakan sistem umbaran agar ternak merasa nyaman dan tidak stres. Penelitian ini bertujuan mengevaluasi kecukupan nutrisi pakan pada sistem pemeliharaan free-range terhadap komposisi karkas ayam IPB-D1 di Sinar Harapan Farm umur 11 minggu yang telah dipelihara selama 6 minggu. Sampel yang digunakan yaitu 20 ekor ayam IPB-D1 (9 ekor jantan, 11 ekor betina) diambil secara porpusive sampling dari 110 ekor. Data penelitian dianalisis secara deskriptif menyajikan data rata-rata dan standar deviasi. Variabel yang diukur dalam penelitian ini bobot potong, persentase karkas, persentase potongan komersial dan persentase potongan non-karkas. Hasil penelitian menunjukan bobot potong jantan lebih besar dibandingkan betina, nilai rata-rata sebesar 900,33 g dan 869,73 g. Ratarata karkas jantan 56,44% dan betina 53,57%. Persentase non karkas jantan dan betina dengan pemeliharaan free range 33,64% dan 35,72%. Simpulan penelitian yaitu pemeliharaan sistem free range pada karkas dan potongan komersial ayam IPB-D1 mengandung mineral Fe tinggi dibandingkan daging ayam broiler., The free-range system is an umbrella system so that livestock feel comfortable and not stressed. This study aimed to evaluate the adequacy of feed nutrition in the free-range rearing system on the carcass composition of 11-weekold IPB-D1 chickens at Sinar Harapan Farm that have been reared for 6 weeks. The samples used in this study were 20 IPB-D1 chickens (9 males, 11 females) taken by porpusive sampling from 110 chickens. The research data were analyzed descriptively presenting the average data and standard deviation. The variables measured in this study were slaughter weight, carcass percentage, percentage of commercial cuts and percentage of non-carcass cuts. The results showed that the slaughter weight of males was greater than females, with an average value of 900.33 g and 869.73 g, respectively. The average carcass of males was 56.44% and females 53.57%. The percentage of non-carcass males and females with free range maintenance is 33.64% and 35.72%. The conclusion of the study was that the maintenance of a free range system on carcasses and commercial cuts of IPB-D1 chickens contain high Fe minerals compared to broiler meat.
Keyword: carcass, IPB-D1 Chicken, Free range

Judul: : Persamaan Tunggal sebagai Representasi Kurva Komposit
Abstrak: A mathematical method is introduced to represent a composite curve based on an extension of analytic geometry. The representation is given either with a single equation or with two equations, in the case of parametric representation. This method permits the representation of composite curves in similar manner to the conventional representation of non-composite curves. Some mathematical tools, including Heaviside unit step function and periodizer function, are used in the establishment of a single equation. In this paper, regular equations of regular and irregular polygon, as well as composite curves of two dimensions, are implemented using a computer algebraic system, Mathematica.
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