Created on Thu Jul 28, 2011 6:03 am with 15 blog posts
My blog is just a rundown of what I have learnt recently in IT related things. Or it could include other things from time to time.
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Life isn’t about finding yourself. Life is about creating yourself – George Bernard Shaw.
Twenty years from now you will be more disappointed by the things that you didn’t do than by the ones you did do. So throw off the bowlines. Catch the trade winds in your sails. Explore. Dream. Discover – Mark Twain.
I have found that if you love life, life will love you back - Arthur Rubinstein.
Don’t ask what the world needs. Ask what makes you come alive and go do it. Because what the world needs is more people who have come alive – Howard Thurman.
There are two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle - Albert Einstein.
Never be bullied into silence. Never allow yourself to be made a victim. Accept no one’s definition of your life; define yourself - Harvey Fierstein.
Dance like the photo’s not being tagged. Love like you’ve never been unfriended. Sing like nobody’s following. Share like you care. And do it all like it won’t end up on youtube!
”It’s impossible” said pride. “It’s risky” said experience. “It’s pointless” said reason. “Give it a try” whispered the heart - Anonymous (via Tad).
Happiness is a choice. Choose happy.
No matter how far wrong you've gone, you can always turn around.
Even if you’re on the right track, you’ll get run over if you just sit there – Will Rogers.
You are who you are and what you are because of what has gone into your mind. You can change who you are and what you are by changing what goes into your mind - Zig Ziglar
Whether you believe you can do a thing or not, you are right - Henry Ford.
http://www.yourlifeyourway.net/2011/09/06/75-best-kickass-inspirational-quotes-on-life-love-happiness-change-growth/ |
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The future depends on what we do in the present. - Mahatma Gandhi
Go confidently in the direction of your dreams. Live the life you have imagined.
Henry David Thoreau
Every great dream begins with a dreamer. Always remember, you have within you the strength, the patience, and the passion to reach for the stars to change the world.
Harriet Tubman
Reach high, for stars lie hidden in your soul. Dream deep, for every dream precedes the goal.
Pamela Vaull Starr
So often times it happens that we live our lives in chains
And we never even know we have the key.
Lyrics from Already Gone, peformed by the Eagles for their 1974 On the Border album
Commitment leads to action. Action brings your dream closer.
Marcia Wieder
The best way to make your dreams come true is to wake up.
Paul Valery
The virtue lies in the struggle, not in the prize.
Richard Monckton Milnes
The sure way to miss success is to miss the opportunity.
Victor Chasles
Opportunity, sooner or later, comes to all who work and wish.
Lord Stanley
Opportunities do not come with their values stamped upon them. Everyone must be challenged. A day dawns, quite like other days; in it a single hour comes, quite like other hours; but in that day and in that hour the chance of a lifetime faces us.
Maltbie Davenport Babcock
A man in earnest finds means or, if he cannot find, creates them.
William Ellery Channing
We must look for the opportunity in every difficulty instead of being paralyzed at the thought of the difficulty in every opportunity.
Walter E. Cole
You will never "find" time for anything. If you want time, you must make it.
Charles Buxton
Do not wait for ideal circumstances, nor for the best opportunities; they will never come.
Janet Erskine Stuart
Happy are those who dream dreams and are ready to pay the price to make them come true.
Leon J. Suenes
You miss 100% of the shots you don't take.
Wayne Gretzky
The journey of a thousand miles begins with a single step.
Lao Tzu
Self-trust is the first secret of success.
Ralph Waldo Emerson
They can because they think they can.
Virgil
The fact is that in order to do any thing in this world worth doing, we must not stand shivering on the bank thinking of the cold and the danger, but jump in and scramble through as well as we can.
Sydney Smith
Live each day as if your life had just begun.
Johann Wolfgang Von Goethe
Who is the happiest of men? He who values the merits of others, and in their pleasure takes joy, even as though 'twere his own.
Johann Wolfgang von Goethe
Happiness depends more on the inward disposition of mind than on outward circumstances.
Benjamin Franklin
Action may not always bring happiness;
but there is no happiness without action.
Benjamin Disraeli
http://www.inspirational-quotes.info/happiness.html
Our doubts are traitors, and make us lose the good we oft might win, by fearing to attempt.
William Shakespeare
One who fears failure limits his activities.
Failure is only the opportunity to more
intelligently begin again.
Henry Ford
The greatest mistake you can make in life is to continually be afraid you will make one.
Elbert Hubbard |
Well I haven't forgotten my resolve to re-learn my maths skills.
I have been working on linear equations for a bit. i haven't been able to put anything up on it because it is somewhat more difficult than the arithmetic I revised. And more important in many ways.
Turning worded problems into equations has been challenging and is probably one of the most important maths improvements I can do right now to improving my programming ability. After I get through this chapter, I will continue to practise this particular aspect of maths. I am however enjoying it immensely and feel I am progressing infinatley, albeit slowly.
My programming learning is slower again, but have been looking into try/except/raise but need to go and use them in programs to feel confident.
Over the past bit of time, my maths has overtaken my programming, next week I need to get a bit further in the programming side.
"The statement of equality of two ratios is called a proportion."
Find an unknown ratio with a proportion
Eg. If x:4 = 7:12
Make them fractions
make them simple as possible
solve for x
(if x on left, multiply both sides by denominator under x. if x on right, multiply both sides by denominator on opposite and x)
Eg. x:4 = 7:12
x/4 = 7/12
4 * x/4 = 4 * 7/12
x = 28/12
x = 2 and 4/12
x = 2 and 1/3
Eg. If 4: x = 16:20
4/x = 16/20
4/x = 4/5
5x * 4/x = 5x * 4/5
20 = 4x
5 = x
Mean Proportion
"If a: x = x:b, then x is called a mean proportion of a and b."
Make them fractions.
Solve for x
Eg. find a mean proportion of 1 and 2.
1: x = x:2
1/x = x/2
2x * 1/x = 2x * x/2
2 = x^2
plus or minus sqrt.2 = x
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Real Life Application
Gears and belts
tD/tF = rF/rD
That means:
number of teeth on the driver wheel divided by number of teeth on the follower wheel
is equal to
the number of revolutions on the follower wheel divided by the number of revs on the driver wheel.
Note: that they are inverse...
On a belt it is measured, not by teeth, but by the diametre of the wheels. Essentially though, it is the same formula.
dD/dF = rF/rD
Therefore, if you know how many teeth there are, you can figure out how many revolutions by using mean proportion.
"A ratio is a comparison between two like quantities in the same units."
Simplest form ratios
A ratio, such as a:b can be reduced similarly like fractions, using a lowest common denominator approach.
Eg.
2:4 is the same as
1:2
The example ratios 2:4 and 1:2 are also known as equivalent ratios because they really are the same. See also Proportion.
Finding a ratio between quantities
change into same units, then
put lower one on the left
find the simplest
Eg.
300mls and 1.5litres goes to
300mls and 1500 litres
300:1500
3:15
1:5
Dividing a quantity into ratios
If you are given a ratio and a total, you can work out the ratio amounts thus:
Add the parts
Divide the total by the parts to find 1 part
Times the ratio amount by 1 part.
Eg.
20m total, 2:3
2+3=5
20/5=4
4*2 is 8:4*3 is 12
8 metres, 12 metres.
If you are given a ratio and one part:
Divide value by the ratio amount, gives you multiplying factor
Times factor by other ratio amount, now you know value of both sides
add them together for total.
Eg.
5:7, 5 parts is 20
20/5 is 4
7 times 4 is 28
28 + 20 is 48 total
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