Judul: IPB (Bogor Agricultural University)
Abstrak: Dairy cattle farming represent one of environment pollution sources in agricultural sector. Most of dairy farming's in Indonesia are managed in the forms of small holder farming's that give more attention to productivity rather than ecological concerns. The purpose of this study was to make models and their behavior of dairy cattle animal waste pollution on clean water quality and degree of smell at several regions with different natural physical and economic social conditions. This study also investigated the animal waste management that match with the farmer's condition in each region. Model compiled based on to component situation of livestock, environment and farmers condition. Data obtained from result of field observation, laboratory analysis and literature and also statistical of relevant institution. Determination of regional sarnpel of sub-province or town until chosen countryside conducted with multistage sampling without randomization (purposive sampling). Model simulation with program of Powesim 2 . 5 ~ . Based on the result of research can be concluded that 1) low natural physical region and low economic social condition had animal waste can to pollute of environment, 2) The waste management for the region with high natural physical and high economic social of bio gas, for regional with high natural phwical and lw social economics is by selling waste go out ranch location, composting for the region with low natural physical and high economic social, and composting accompanied by removing to excess of animal waste for regional with low natural physical and low economic social, 3) high natural physical region had the potential to realize sustainable small holder dairy cattle, while low natural physical region the availibility of water and forage represent aspect which need to get attention.
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Judul: IPB (Bogor Agricultural University)
Abstrak: ABAS KURIB A Model for Domestic Waste Management in the Musi Riverside Community Settlement, Palembang City, Using Reduce, Reuse, Recycle and Participatory Approaches. Under the supervision of Hartrisari Hardjomidjojo, Surjono H. Sutjahjo ,and Syaiful Anwar The main purpose of the study is to obtain a model of residential waste management within a system framework called “Reduce, Reuse, Recycle, and Participation” (3R+P), assessed particularly for people in Musi Riverside Palembang. To identify the strategy factors for the development of the system, this study employed a number of analyses named Existing-Condition analyses, Stakeholders-Needs analyses, and Expert Judgments. The resulted factors from the analyses were combined and treated as input variables in Prospective Analyses that generated three scenarios namely conservative, moderat, and progressive. By dynamic modeling simulation of the three scenario, the latter met the criteria of the system.
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Judul: Karakteristik Piezoelektrik Film LaxSr₁-xTiO3 di atas Substrat TCO
Abstrak: Studi material perovskite SrTiO3 sudah banyak dilakukan dan menunjukkan sifat feroelektrik, piezoelektrik, kuantum paraelektrik dan superkonduktor yang baik. Dengan penambahan dopant La2O3 diduga menambah performa sifat piezo dan karakteristik lainnya. Karakteristik film LaxSr₁-xTiO3 (LST) dengan variasi x= 0, 0.02, 0.04, 0.06 terbentuk pada suhu annealing 550 oC di atas substrat TCO melalui metode (Chemical Solution Deposition) CSD dan spin coating dengan 700 rpm pada kondisi suhu ruang dan tekanan atmosfer standar. Hasil menunjukkan, semakin banyak pendadah La maka nilai ketebalan film, ukuran rerata kristalit, parameter kisi, transmitansi, nilai konduktivitas (maksimum 589.7 S/cm pada sampel x=0.04 di frekuensi 10 Hz), nilai konstanta tegangan (c) dan muatan (d) piezo semakin meningkat. Dinamika bentuk grafik nilai tegangan (V) dan konstanta regangan mekanik (s) nampak mirip. Nilai V mencapai 0.127 V untuk x=0.06 (beban 50 g). Nilai maksimum c, d, s masing-masing mencapai 20.07 Vm/N, 1.14x10-8 C/N, 13642.71. Nilai band gap untuk x=0, 0.02, 0.04, 0.06 masing-masing 3.21 eV, 3.1 eV, 2.6 eV, 2.4 eV. La2O3 menambah performa sifat piezo, sehingga LST berpotensi sebagai sensor tekanan.
Keyword: CSD method, La2O3, LaxSr1-xTiO3, piezoelectric, TCO