Judul: Kadar H2S, NO2, dan debu pada peternakan ayam broiler dengan kondisi lingkungan yang berbeda di Kabupaten Bogor, Jawa Barat
Abstrak: The development of broiler chicken farms may cause negative impacts such as emissions include hydrogen sulfide (H2S) and nitrogen dioxide (NO2) and particles of dust. Environmental quality is very necessary for broiler chicken. The levels of gases and dust is affected by environmental condition. Information of the levels of H2S, NO2, and dust in broiler chicken farms in Bogor Regency has not been widely available. The purpose of this study was to assess the levels of H2S, NO2, and dust from broiler chicken farms with different environmental conditions. This research was conducted on Bagus Farms that located in West Semplak, Kemang District, Bogor Regency (170 above see level) and Ikhtiar Farm that located in Cikoneng Talang, Pamijahan District, Bogor Regency (520 above sea level). This research was conducted during October until November 2010. The result shows that the levels of H2S, NO2 and dust at two research sites were lower than basic standard of H2S, NO2 and dust consisted in ambient air. The level of H2S, NO2 and dust in Ikhtiar Farm that was lower than in Bagus Farm was caused by enviromental condition (temperature, humidity, wind speed and altitude), broiler chicken farm condition (roofing, the broiler chicken farm system) and condition around the broiler chicken farm (agriculture area and plants planted around broiler chicken farm). However, the further researches on emissions inventory from broiler chicken farms is needed to provide a comprehensive data of emissions from broiler chicken farms in Bogor Regency
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Judul: Pendugaan emisi gas metan dan dinitrogen oksida dari berbagai jenis ternak di Kabupaten Bogor
Abstrak: The aim of these research was to observe the level of emission greenhouse gases from livestock sector in Bogor Regency. Various animal species used in this research were dairy cow, beef cattle, buffalo, swine, horse, and poultry. Data of livestock’s population in Bogor Regency were used for basic calculation. The data were collected from literature and direct observation collection through survey of animal characterization and manure management, inventory equation of emission greenhouse gas based on Intergovernmental Protocol of Climate Change (IPCC). Data were processed by Microsoft Excel. Model of calculation consist of model I and model II. Model I used IPCC default data, meanwhile model II used literature and survey data. Methane and dinitrogen oxide which was produce from livestock converted into carbon dioxide based on value of Global Warming Potential (GWP). The greenhouse gases emission in Bogor Regency were 201.46 Gg CO2 eq by model I and 170.21 Gg CO2 eq by model II. Animal which was produced GHG from the highest to the lowest by (model I and model II) were sheep (33% and 39%), dairy cow (21% and 9%), buffalo (16% and 18%), goat (12% and 17%), beef cattle (10%), poultry (6% and 7%), swine (1% and 0%), and horse (0%). The highest level of greenhouse gases emission was produced by Pamijahan District as many as 17.63 Gg CO2 eq (8.75%) by model I and 12.1 Gg CO2 eq (7.03%) by model II.
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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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