Pengaruh Harga Minyak Dunia, Nilai Tukar Rupiah Terhadap Dollar, Dan Tingkat Inflasi Terhadap Harga Saham (Studi Pada PT Bumi Resources Minerals Tbk Periode Januari 2008 – Desember 2013)

This research aims to determine: Effect of Oil Price variable, Exchange Rate of Rupiah Against Dollar and Inflation Rate, jointly and partially to the stock price of PT Bumi Resources Minerals Tbk. This type of research is explanatory research with quantitative approach. The population in this study are all variables time series data and time series data as much as 72 of variable period January 2008 - December 2013 serve as the research sample. Results of multiple linear regression analysis showed that the variables comprising the World Oil Price, Exchange Rate of Rupiah Against Dollar and Inflation Rate together have an effect on stock price of PT Bumi Resources Minerals, however partially Oil prices had no effect on stock price. Against Dollar Exchange Rate of Rupiah and inflation has a negative correlation to the stock price. Taken together sig.F 0,000 value. While partially World Oil Prices showed sig t amounted to 0,646. Variable Value Against Dollar Exchange Rate showed sig t value of 0.000. Variable Aspect Inflation showed sig t of 0.018. So the unknown variable that has dominant influence on stock price variable is a variable rate of inflation

Diversification of temporal sewage loading concentration in tropical climates

The efficiency of the wastewater treatment is highly influenced by the characteristics of incoming raw wastewater into the treatment plant. The improper design resulted in inefficient treatment, of which consequently leading to the pollution and contaminant release to nearby water streams. High concentration of untreated or inefficiently treated effluent poses significant impacts to the health of both human and aquatic life. Wastewater characteristics based on real-time monitoring measurement in a catchment area, in particular at the inlet chamber of a sewage treatment plant (STP) not only provides precise data and information of pollutant loading behavior but also hypothesis the lifestyle and waste habit in the specific locations. In this research, the parameters of Chemical Oxygen Demand (COD) and Ammonia Nitrogen (NH3-N) incoming raw wastewater samples were temporally monitored. The measurement campaign was conducted at two locations, at a Network Pumping Station (NPS) and connected STP with Population Equivalent (PE) of 1000 and 60000, respectively. The temporal variation for COD shows a regular pattern with distinct peaks, i.e., at morning and evening were identified. However, no temporal variation was observed for parameter NH3-N. The strength of the wastewater influent has a fairly low concentration of COD between 57 mg/L to 313 mg/L at NPS and 117 mg/L to 612 mg/L at STP. This value is lower than the commonly influent designed STP of COD concentration at 500 mg/L (Malaysian Sewerage Industry Guidelines (MSIG), Volume IV, Section 3). Comparison of wastewater pattern with temperate climate of South Korea showed a discrepancy in terms of peak time and concentration pattern