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  • Christine Felizardo 11:01 am on May 21, 2017 Permalink | Reply
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    Avisala Meiste! 

    Which topic/s in class made an impact to you? Why?
    This might seem like I’m biased with differential equations… which I am. I’ve always been intrigued about what differential equations are and what purpose they serve in the universe, and a good portion of my questions have been answered. So many things in the world are represented by differential equations, and DEs basically give us an idea of the one thing that is constant in this world: change.

    If you can summarize this course in one word or sentence, what would it be?
    Wildt.

    What would be your parting message to the class?
    Hello reader! It’s been a very tough sem for all of us but the end is coming by soon! Hang in there! We can do it! ❤

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  • Christine Felizardo 12:10 pm on May 3, 2017 Permalink | Reply
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    Control systems 

    Laplace Transforms can be used in control systems.

    Control systems refer to a set of devices that directs the behavior of other devices. One might say that a control system controls other systems. A problem that can be solved by such is stated below:

    We have a particular electric motor that is supposed to turn at a rate of 40 RPM. To achieve this speed, we must supply 10 Volts to the motor terminals. However, with 10 volts supplied to the motor at rest, it takes 30 seconds for our motor to get up to speed. This is valuable time lost.

    Manipulation of such systems is made possible by converting them into something called a Laplace transform domain, so that a problem can be easily solved with integral transforms and Ordinary Differential Equations or ODEs (as changes can be visualized with these things). The math involved in a control system makes it possible for humans and even computers to manipulate control systems.

    References:
    https://www.electrical4u.com/control-system-closed-loop-open-loop-control-system/
    https://en.wikibooks.org/wiki/Control_Systems/Introduction
    https://www.facstaff.bucknell.edu/mastascu/eControlHTML/Intro/Intro1.html

     
  • Christine Felizardo 12:41 pm on February 11, 2017 Permalink | Reply
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    Lorentz Symmetry 

    Lorentz symmetry states that the outcome of an experiment does not depend on certain aspects of its surroundings, namely the velocity and the direction of its moving reference frame—properties that become relevant when studying astronomical objects and launching satellites, for instance, as well as for unifying quantum mechanics and general relativity.

    Source: https://phys.org/news/2016-12-violation-lorentz-symmetry-strongest.html#jCp

     
  • Christine Felizardo 10:34 am on January 27, 2017 Permalink | Reply
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    Wayfinding 101 

    Vectors are used in sailing. They are represented by sideways and forward components, as explained below. Looks like Moana needs that science after all.

    The physics behind sailing is very interesting in that sailboats do not need the wind to push from behind in order to move. The wind can be blowing from the side and the sailboat can still move forward. How is this possible?

    The answer lies in the well-known principle of aerodynamic lift. Imagine you are a passenger in a car as it’s moving along, and you place your right hand out the window. If you tilt your hand in the clockwise sense your hand will be pushed backwards and up. This is due to the force of the air which has a sideways component and upwards component (therefore your hand is pushed backwards and up).

    In a similar fashion, when the wind blows against the sails from the side, this creates a force which has a sideways component and a forward component.

    However, we do not want the sailboat to move sideways. We only want it to move forward (as much as possible). This is accomplished with a keel, located underneath the sailboat. The keel provides the counter-force necessary to resist sideways motion of the sailboat, as much as possible.

    So in general, there are two main components of a sailboat which enable it to move forward effectively. They are the sail and the keel, as shown below.

    Thus, the physics of sailing involves the interaction of the wind and sails, and the interaction of the water and keel.

    Source: http://www.real-world-physics-problems.com/physics-of-sailing.html

     
  • Christine Felizardo 11:13 am on January 18, 2017 Permalink | Reply
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    It me 

    Week 1: Introduce yourself

    What’s your name?
    Wassup, I’m Christine Felizardo, but you can call me Christine.

    What were your thoughts when you enrolled in this course?
    Honestly, I was in a very “WOO YES PUMASA NA AKO NG 55 PWEDE NA AKO MAG-130” mood. Although, I didn’t think too much about what I’ll expect from this subject. I do know there’s a lot of math yet again, but that’s pretty much it.

    How comfortable are you with math?
    Story time! I loved my Math 5x series. I never got a grade above 2.25 and below 2.5, but that doesn’t match up the fun I’ve had reviewing for exams (YES, I really did enjoy my studying for each LE). My most favourite of all is 55, which I actually took twice; I dropped it the first time, because I disliked my prof (a combo-breaker for my series of wonderful, kind Math profs) and I didn’t feel like I was appreciating what I was learning. Was 55 supposed to be that tedious? Why am I upset? (The real reason, however, is that I was anticipating removals and we were going abroad the week after the semester ended. I didn’t want to miss that so I just nipped it in the bud.)
    The second time was the real game-changer. I didn’t think too much about what I felt about math when I took 53 and 54, but by the time I was taking 55 I was like wow, I actually love math. I feel like it was largely because my prof now was once again part of the wonderful & kind ones I mentioned earlier, which I am super grateful for since it changed my attitude on 55. There’s just something fun about double/triple integrals, or drawing an elliptic paraboloid, or even solving for whether this equation was convergent or divergent. Sure it would frustrate me to an extent when something wasn’t right, but I mostly channel that frustration to checking what I’m missing, then trying again. Math was a constant cycle of learning. I eventually got to appreciate the complexity of it all.
    To sum it up, I’m comfortable with Math.

    What’s your dominant feeling right now?
    I’m hopeful about the coming semester, and even the coming months of 2017. I’m expecting a lot of crying occurring in the near future, but that’s what adds spice to life, honestly.

     
    • Paul Rossener 11:22 am on January 22, 2017 Permalink | Reply

      That’s a great attitude Christine! I hope this course will add another cycle to your learning. 🙂

      Like

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