Publications
2013
Source Identification and Apportionment of Fine and Coarse Particulate Matter in Metro Manila by Positive Matrix Factorization
Development of a Differential Optical Absorption Spectroscopy Analyzer for Detecting Ambient Concentrations of Sulfur Dioxide
A climatological analysis of the southwest monsoon rainfall in the Philippines
Abstract The historical behavior of the southwest monsoon (SWM) rainfall in the Philippines is described using observed rainfall during the months of June to September from 1961 to 2010. Data are obtained from meteorological stations situated in the western half of the country...
Spatio-temporal validation of satellite-based rainfall estimates in the Philippines
Abstract Satellite-based rainfall is an alternative source of information especially for developing countries such as the Philippines where there are many areas that do not have ground observation stations. To maximize the use and potential of the derived precipitation products, it is important...
Satellite Rainfall Validation and Assimilation into a Weather Forecast Model
Development of a Digital Seismograph Using the Arduino Platform
Evaluation of the Efficiency of an Ultrafine Titanium Dioxide-based Paint for Removing Nitrogen Oxides in an Indoor and Outdoor Environment
The Effects of Urban Expansion in Metro Manila on the Southwest Monsoon Rainfall
2012
Development of an Ozone Detector for the Calibration System of the Differential Optical Absorption Spectrometer
Polarization ellipse and Stokes parameters in geometric algebra
In this paper, we use geometric algebra to describe the polarization ellipse and Stokes parameters. We show that a solution to Maxwell’s equation is a product of a complex basis vector in Jackson and a linear combination of plane wave functions. We convert...
2008
Particulate Matter Characterization in Manila Observatory
Particulate matter (PM) samples were collected from March to June 2007 on filters using a multi-stage filter setup. Each event generated a sample from fine (2.5 μm and 10 μm (> PM10) size fractions. The samples were analyzed for gravimetric and ionic content....
Identification of Ambient Particulate Matter Source Direction Using The Conditional Probability Function
This study uses the Conditional Probability Function to determine directions associated with high values of receptor model-generated source contributions at the Manila Observatory (MO). Wind measurements and 24-hour average fine and coarse fraction concentrations measured from 2005 to 2007 were used. Results for...