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: 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: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition