• #### Sig Encarnacion 8:11 am on May 23, 2017 Permalink | Reply Tags: Synthesis ( 52 )

Which topic/s in class made an impact to you? Why?
On Fourier and Laplace transform: Sir, interesting ung gadget na nag-s-scan ng brain waves na dinemo niyo sa class. Iniisip ko tuloy kung pwede ba siyang gamitin as a means to know if a person is filtering out all criticism and is processing feedback only when it is positive i.e. praise.

If you can summarize this course in one word or sentence, what would it be?
It was enjoyable, but I honestly wish for a more in-depth discussion of each of the topics.

What would be your parting message to the class?
Keep on learning.

• #### Sig Encarnacion 2:30 am on May 3, 2017 Permalink | Reply Tags: Transform ( 55 )

ELECTRIC CIRCUIT ANALYSIS

“The Laplace transform can be applied to solve the switching transient phenomenon in the series or parallel RL,RC or RLC circuits ”

Laplace transform saves us the hassle of solving ODEs by converting such equations into algebraic ones so they may be solved more easily.

Fundamentals of analyzing RLC/RL/RC circuits:

“1. Develop the differential equation in the time-domain using Kirchhoff’s laws (KVL, KCL) and element equations.

2. Apply the Laplace transformation of the differential equation to put the equation in the s-domain.”

3. Algebraically solve for the solution, or response transform.

4. Apply the inverse Laplace transformation to produce the solution to the original differential equation described in the time-domain. “

It transforms a typical KVL equation such as,

into this,

which, by isolating our target variable I is:

which is a function involving only the variable s and some other constants (V0, I0, L, R, C).

Reference:

Continuing the example above with actual values of R, L,and C:http://www.dummies.com/education/science/science-electronics/analyze-an-rlc-circuit-using-laplace-methods/

## Pottery

We see these in almost every household as decorations or accessories or plant containers. Some restaurants use them to cook their dishes. In Egypt, these (canopic jars) are used to house the insides of a dead body. We break pottery urns in our favorite video game to earn extra points and whatnot.

Pot making / earthenware making is a craft that lets us mold the symmetry of the once wet clay according to what we want it to be.

## Wind vectors

Wind maps are generated by computer programs as spaces of wind field vectors. The maps are updated in real-time, can analyse wind vectors for up to a height of 140m and have been used for many applications. They are the ones we usually see on TV when the weather forecaster tells us if we can take a walk in the park or stay at home and have our pandesal and coffee instead since the weather doesn’t permit us to.
As another application, energy researchers use these to find optimal land spaces for energy resource gathering. They use wind maps to know where the most frequent and fast speed winds occur to increase energy production and at the same time lessen wind turbine production costs (taking into account how high a tower for the mechanism needs to be built and how many should be built as well).

To know more about wind energy (and other forms of energy) harnessing: https://www.energy.gov/eere/energybasics/energy-basics

Here is a simple example..

The arrows tell us wind’s direction and each one’s elongation tell us how fast they move with respect to the ground

http://ww2010.atmos.uiuc.edu/%28Gl%29/guides/maps/upa/wndvct.rxml

As a side note, the thought of making these wind maps more refined and more fluid as in the work of Fernanda Viégas and Martin Wattenberg made them worthy to be exhibited in MoMA in New York.

Wind map simulation created by the two googlers: https://thescene.com/watch/wired/wind-maps-by-martin-wattenburg-and-fernando-viegas?save_video=true

## Hello

Hi, I’m Sigfried. Most people call me Sig.
• What were your thoughts when you enrolled in this course?
At the very least, I want to expand my way of thinking mathematically/analytically and hopefully I would be able to apply these new cognitive strategies to programming. CS 130 is going to be my mental gym for my other CS courses.
• How comfortable are you with math?
Math can be hard to learn, but I am usually more tenacious on studying about it than with my other subjects. Math can also be fun though. I usually play with numbers in my head and try to come up with tricks of my own.
• What’s your dominant feeling right now?
Thankful for being healthy and alive. Getting physically sick is not one thing I would want to experience. It’s awful to feel useless and make others feel worried about me.

• #### Paul Rossener 4:52 pm on February 22, 2017 Permalink | Reply

I hope you’ll get a good mental workout in our course, Sig. I heard your gym instructor is quite a newbie. 😉

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