SPP 2011 papers in Google+: abstracts, pictures, and tables

by Quirino Sugon Jr.

I screen-grabbed the abstract, figures, and tables of your SPP 2011 papers and posted them in Google+.  This would make the job of those who want to showcase departmental research this Sunday for the students who made it to the Director’s List .  I’ll take three projects representative of the department’s laboratories for the SOSE presentation slides of Dr. Dayrit on Sunday.  We can use these pictures also for the preparation of posters for Interlinks.  Those who do not wish to have their pictures posted in Google please inform me.  These is one of the pictures:

https://plus.google.com/b/106776611692288920134/photos/106776611692288920134/albums/5707114060024938001

To simplify web administration, I shall upload in Facebook only those pictures that concern Faces.  In Google+, I shall upload only pictures that are research results or teaching materials.  In this way, these two social networking sites have their own specific functions.

JOSA A 2012: Polarization ellipse and Stokes parameters in geometric algebra

Citation
Adler G. Santos, Quirino M. Sugon, Jr., and Daniel J. McNamara, “Polarization ellipse and Stokes parameters in geometric algebra,” J. Opt. Soc. Am. A 29, 89-98 (2012)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-29-1-89

Abstract

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 both the amplitudes and the wave function arguments from complex scalars to complex vectors. This conversion allows us to separate the electric field vector and the imaginary magnetic field vector, because exponentials of imaginary scalars convert vectors to imaginary vectors and vice versa, while exponentials of imaginary vectors only rotate the vector or imaginary vector they are multiplied to. We convert this expression for polarized light into two other representations: the Cartesian representation and the rotated ellipse representation. We compute the conversion relations among the representation parameters and their corresponding Stokes parameters. And finally, we propose a set of geometric relations between the electric and magnetic fields that satisfy an equation similar to the Poincaré sphere equation.

© 2012 Optical Society of America

» View Full Text: Acrobat PDF (367 KB)

Global Positioning Systems: Physical principles, data formats, and other applications

by Quirino Sugon Jr.

Here is a link to the slides of my talk at Manila Observatory yesterday, 24 November 2011, for Geology and Geodesy students of UP Diliman. The talk was entitled: “Global Positioning Systems: Physical principles, data formats, and research applications.”

AOGS-2011: A correlation of TRMM, GPCC and ground-based measurements of monthly rainfall rate in Manila Observatory

Correlation of TRMM, GPCC and ground-based measurements of monthly rainfall rate in the Manila Observatory

JF 2002: Accurate Forecasting of the Undecided Population in a Public Opinion Poll

Christopher Monterola 1, May Lim 1, Jerrold Garcia 2, Caesar Saloma 1, Accurate Forecasting of the Undecided Population in a Public Opinion Poll , J. Forecast. 21, 435–449 (2002).

1 National Institute of Physics, University of the Philippines
2 Department of Physics, Ateneo de Manila University, Philippines

Abstract

The problem of pollsters is addressed which is to forecast accurately the final answers of the undecided respondents to the primary question in a public opinion poll. The task is viewed as a pattern-recognition problem of correlating the answers of the respondents to the peripheral questions in the survey with their primary answers. The underlying pattern is determined with a supervised artificial neural network that is trained using the peripheral answers of the decided respondents whose primary answers are also known. With peripheral answers as inputs, the trained network outputs the most probable primary response of an undecided respondent. For a poll conducted to determine the approval rating of the (former) Philippine president, J. E. Estrada in December 1999 and March 2000, the trained network predicted with a 95% success rate the direct responses of a test population that consists of 24.57% of the decided population who were excluded in the network training set. For the undecided population (22.67% of December respondents; 23.67% of March respondents), the network predicted a final response distribution that is consistent with the approval/disapproval ratio of the decided population.

Copyright  2002 John Wiley & Sons, Ltd