Judul: Identification Injury of Rooster and Hen IPB-D1 Chickens in Maintenance of Free-range System
Abstrak: Chickens rearing in an intensive system with limited area causes chickens to be more easily stressed. Stressed can decreasing health of chickens and will have an impact on decreasing the quality and meat production that can be seen from the presence of injuries, such as foot pad dermatitis (FPD), hock burn (HB), and breast blister (BB). The aim of this study was to analyze and study the effect of the free-range system on injury in IPB-D1 chickens. This study used rooster and hen IPB-D1 chickens. This research is descriptive in nature by observing and assessing the soles of the feet, knees and breasts of the chickens. Injury assessment was carried out when the chicken were 8, 12, and 16 weeks old. The results showed that the incidence of foot pad dermatitis in rooster and hen chickens aged 12 weeks was 26.67% and 13.33%, respectively. Foot pad dermatitis injury increased to 40% in roosters and 33.33% in hens when the chickens were 16 weeks old. Breast blister injuries of 13.33% only occurred in roosters when they were 16 weeks old. Hock burn injuries did not occur in either roosters or hens., Pemeliharaan ayam dengan sistem intensif dengan penggunaan lahan yang terbatas menyebabkan ayam lebih rentan terkena cekaman stres. Adanya cekaman ini secara tidak langsung dapat menurunkan tingkat kesehatan ayam dan akan berdampak pada penurunan kualitas dan produksi daging. Penurunan kesehatan ayam dapat dilihat dari adanya cedera, seperti foot pad dermatitis (FPD), hock burn (HB), dan breast blister (BB). Penelitian bertujuan menganalisis dan mempelajari pengaruh sistem pemeliharaan free-range terhadap cedera pada ayam IPB-D1. Ayam yang digunakan dalam penelitian ini adalah ayam jantan dan betina IPB-D1. Penelitian ini bersifat deskriptif dengan cara mengamati dan menilai bagian telapak kaki, lutut, dan dada ayam. Penilaian cedera dilakukan saat ayam berumur 8, 12, dan 16 minggu. Hasil penelitian menunjukkan kejadian cedera foot pad dermatitis pada ayam jantan dan betina berumur 12 minggu berurutan sebanyak 26,67% dan 13,33%. Cedera foot pad dermatitis meningkat menjadi 40% pada ayam jantan dan 33,33% pada ayam betina saat ayam berumur 16 minggu. Cedera breast blister sebanyak 13,33% hanya terjadi pada ayam jantan saat berumur 16 minggu. Cedera hock burn tidak terjadi baik pada ayam jantan maupun ayam betina.
Keyword: free-range, injury, IPB-D1chicken

Judul: Free Range System Maintenance Evaluation of Inside  Organs and Digestive Tract of Chicken IPB-D1.
Abstrak: Pemeliharaan menjadi salah satu faktor keberhasilan suatu usaha ternak unggas. Umumnya pemeliharaan dilakukan secara intensif namun menyebabkan ayam hidup dalam kondisi stres dan tidak sejahtera. Upaya yang dilakukan untuk meminimalisir dampak negatif tersebut dengan menerapkan pemeliharaan sistem free range. Penelitian ini bertujuan mengevaluasi pengaruh pemeliharaan sistem free range terhadap kondisi organ dalam dan saluran pencernaan pada ayam IPBD1 umur 11 minggu di Sinar Harapan Farm. Sampel yang digunakan sebanyak 20 dari 110 ekor ayam IPB-D1 yang diambil secara purposive sampling. Data penelitian dianalisis secara deskriptif dengan menyajikan rata-rata (x̅) dan standar deviasi (sd). Hasil penelitian menunjukkan bahwa bobot organ dalam dan saluran pencernaan ayam IPB-D1 yang dipelihara secara free range lebih berat dibandingkan ayam IPB-D2 yang dipelihara intensif. Kesimpulan penelitian ini bahwa sistem free range meningkatkan konsumsi serat kasar dari hijauan yang berdampak pada berat organ dalam menjadi lebih besar., The rearing system is one of the success factors in the poultry farming business. In general, chickens are carried out intensively which causes the chickens to live under stressful conditions and leads to unwelfare poultry. Efforts made to minimize these negative impacts can be done with a free-range maintenance system. This study aims to evaluate the effect of rearing using the free range system on internal organs and digestive tract conditions of IPB-D1 chickens at 11 weeks of age at Sinar Harapan Farm. The sample used in this study was 20 IPB-D1 chickens taken by purposive sampling from 110 IPB-D1 chickens. The research data were analyzed descriptively by presenting the average (x̅) and standard deviation (sd). The results showed that free-range maintenance affected the internal organs and digestive tract of IPB-D1 chickens. Internal organ weights and digestive tract of IPB-D1 chickens reared in a free range showed heavier compared to those of IPB-D2 chickens. This study concludes that free range increases the consumption of crude fiber from forages which has an impact on the weight of the internal organs becoming larger.
Keyword: ayam IPB-D1, free range, organ dalam, saluran pencernaan, serat kasar

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology