Saturday, 25 August 2012

Fables

Androcles
An Aesop's Fable 

A slave named Androcles once escaped from his master and fled to the forest. As he was wandering about there he came upon a Lion lying down moaning and groaning. At first he turned to flee, but finding that the Lion did not pursue him, he turned back and went up to him. As he came near, the Lion put out his paw, which was all swollen and bleeding, and Androcles found that a huge thorn had got into it, and was causing all the pain. He pulled out the thorn and bound up the paw of the Lion, who was soon able to rise and lick the hand of Androcles like a dog. Then the Lion took Androcles to his cave, and every day used to bring him meat from which to live. But shortly afterwards both Androcles and the Lion were captured, and the slave was sentenced to be thrown to the Lion, after the latter had been kept without food for several days. The Emperor and all his Court came to see the spectacle, and Androcles was led out into the middle of the arena. Soon the Lion was let loose from his den, and rushed bounding and roaring towards his victim. But as soon as he came near to Androcles he recognised his friend, and fawned upon him, and licked his hands like a friendly dog. The Emperor, surprised at this, summoned Androcles to him, who told him the whole story. Whereupon the slave was pardoned and freed, and the Lion let loose to his native forest.                                                                                                                                                      

Moral: Gratitude is the sign of noble souls

Avaricious and Envious

Two neighbours came before Jupiter and prayed him to grant their hearts' desire. Now the one was full of avarice, and the other eaten up with envy. So to punish them both, Jupiter granted that each might have whatever he wished for himself, but only on condition that his neighbour had twice as much. The Avaricious man prayed to have a room full of gold. No sooner said than done; but all his joy was turned to grief when he found that his neighbour had two rooms full of the precious metal. Then came the turn of the Envious man, who could not bear to think that his neighbour had any joy at all. So he prayed that he might have one of his own eyes put out, by which means his companion would become totally blind.


Moral: Vices are their own punishment


Monday, 20 August 2012

Owl City & Carly Rae Jepsen - Good Time

 

Woah-oh-oh-oh
It's always a good time
Woah-oh-oh-oh
It's always a good time


Woke up on the right side of the bed
What's up with this Prince song inside my head?
Hands up if you're down to get down tonight
Cuz it's always a good time.

Slept in all my clothes like I didn't care
Hopped into a cab, take me anywhere
I'm in if you're down to get down tonight
Cuz it's always a good time

Good morning and good night
I wake up at twilight
It's gonna be alright
We don't even have to try
It's always a good time

Woah-oh-oh-oh Woah-oh-oh-oh
It's always a good time
Woah-oh-oh-oh Woah-oh-oh-oh
We don't even have to try, it's always a good time.

Freaked out, dropped my phone in the pool again
Checked out of my room hit the ATM
Let's hang out if you're down to get down tonight
Cuz it's always a good time

Good morning and good night
I wake up at twilight
It's gonna be alright we don't even have to try
It's always a good time.

Woah-oh-oh-oh Woah-oh-oh-oh
It's always a good time
Woah-oh-oh-oh Woah-oh-oh-oh
We don't even have to try, it's always a good time.

Woah-oh-oh-oh Woah-oh-oh-oh
It's always a good time
Woah-oh-oh-oh Woah-oh-oh-oh
We don't even have to try, it's always a good time.

Doesn't matter when
It's always a good time then
Doesn't matter where
It's always a good time there

Doesn't matter when,
It's always a good time then

It's always a good time
Woah-oh-oh-oh Woah-oh-oh-oh
It's always a good time
Woah-oh-oh-oh Woah-oh-oh-oh
We don't even have to try, it's always a good time

Woah-oh-oh-oh Woah-oh-oh-oh
It's always a good time
Woah-oh-oh-oh Woah-oh-oh-oh
We don't even have to try, it's always a good time.

Monday, 6 August 2012

Parables

The Ripple Effect
The Master was walking through the fields one day when a young man, a troubled look upon his face, approached him. "On such a beautiful day, it must be difficult to stay so serious," the Master said. "Is it? I hadn't noticed," the young man said, turning to look around and notice his surroundings. His eyes scanned the landscape, but nothing seemed to register; his mind elsewhere. Watching intently, the Master continued to walk. "Join me if you like." The Master walked to the edge of a still pond, framed by sycamore trees, their leaves golden orange and about to fall. "Please sit down," the Master invited, patting the ground next to him. Looking carefully before sitting, the young man brushed the ground to clear a space for himself. "Now, find a small stone, please," the Master instructed. "What?" "A stone. Please find a small stone and throw it in the pond." Searching around him, the young man grabbed a pebble and threw it as far as he could. "Tell me what you see," the Master instructed. Straining his eyes to not miss a single detail, the man looked at the water's surface. "I see ripples." "Where did the ripples come from?" "From the pebble I threw in the pond, Master." "Please reach your hand into the water and stop the ripples," the Master asked. Not understanding, the young man stuck his hand in the water as a ripple neared, only to cause more ripples. The young man was now completely baffled. Where was this going? Had he made a mistake in seeking out the Master? After all he was not a student, perhaps he could not be helped? Puzzled, the young man waited. "Were you able to stop the ripples with your hands?" the Master asked. "No, of course not." "Could you have stopped the ripples, then?" "No, Master. I told you I only caused more ripples." "What if you had stopped the pebble from entering the water to begin with?" The Master smiled such a beautiful smile; the young man could not be upset. "Next time you are unhappy with your life, catch the stone before it hits the water. Do not spend time trying to undo what you have done. Rather, change what you are going to do before you do it." The Master looked kindly upon the young man. "But Master, how will I know what I am going to do before I do it?" "Take the responsibility for living your own life. If you're working with a doctor to treat an illness, then ask the doctor to help you understand what caused the illness. Do not just treat the ripples. Keep asking questions." The young man stopped, his mind reeling. "But I came to you to ask you for answers. Are you saying that I know the answers?" "You may not know the answers right now, but if you ask the right questions, then you shall discover the answers." "But what are the right questions, Master?" "There are no wrong questions, only unasked ones. We must ask, for without asking, we cannot receive answers. But it is your responsibility to ask. No one else can do that for you."


The Brick
A young and successful executive was traveling down a neighborhood street, going a bit too fast in his new Jaguar. He was watching for kids darting out from between parked cars and slowed down when he thought he saw something. As his car passed, no children appeared. Instead, a brick smashed into the Jag's side door! He slammed on the brakes and backed the Jag back to the spot where the brick had been thrown. The angry driver then jumped out of the car, grabbed the nearest kid and pushed him up against a parked car shouting, "What was that all about and who are you? Just what the heck are you doing? That's a new car and that brick you threw is going to cost a lot of money. Why did you do it?" The young boy was apologetic. "Please, mister...please! I'm sorry but I didn't know what else to do," he pleaded. "I threw the brick because no one else would stop!" With tears dripping down his face and off his chin, the youth pointed to a spot just around a parked car. "It's my brother," he said. "He rolled off the curb and fell out of his wheelchair and I can't lift him up." Now sobbing, the boy asked the stunned executive, "Would you please help me get him back into his wheelchair? He's hurt and he's too heavy for me." Moved beyond words, the driver tried to swallow the rapidly swelling lump in his throat. He hurriedly lifted the handicapped boy back into the wheelchair, then took out a linen handkerchief and dabbed at the fresh scrapes and cuts. A quick look told him everything was going to be okay. "Thank you and may God bless you," the grateful child told the stranger. Too shook up for words, the man simply watched the boy push his wheelchair-bound brother down the sidewalk toward their home. It was a long, slow walk back to the Jaguar. The damage was very noticeable, but the driver never bothered to repair the dented side door. He kept the dent there to remind him of this message "Don't go through life so fast that someone has to throw a brick at you to get your attention!"


Time Management
One day, an expert in time management was speaking to a group of business students and, to drive home a point, used an illustration those students will never forget. As he stood in front of the group of high-powered over-achievers he said, "Okay, time for a quiz" and he pulled out a one-gallon, wide-mouth mason jar and set it on the table in front of him. He also produced about a dozen fist-sized rocks and carefully placed them, one at a time, into the jar. When the jar was filled to the top and no more rocks would fit inside, he asked, "Is this jar full?" Everyone in the class yelled, "Yes." The time management expert replied, "Really?" He reached under the table and pulled out a bucket of gravel. He dumped some gravel in and shook the jar causing pieces of gravel to work themselves down into the spaces between the big rocks. He then asked the group once more, "Is the jar full?" By this time the class was on to him. "Probably not," one of them answered. "Good!" he replied. He reached under the table and brought out a bucket of sand. He started dumping the sand in the jar and it went into all of the spaces left between the rocks and the gravel. Once more he asked the question, "Is this jar full?" "No!" the class shouted. Once again he said, "Good." Then he grabbed a pitcher of water and began to pour it in until the jar was filled to the brim. Then he looked at the class and asked, "What is the point of this illustration?" One eager beaver raised his hand and said, "The point is, no matter how full your schedule is, if you try really hard you can always fit some more things in it!" "No," the speaker replied, "that's not the point. The truth this illustration teaches us is, "If you don't put the big rocks in first, you'll never get them in at all. What are the 'big rocks' in your life, time with loved ones, your faith, your education, your dreams, a worthy cause, teaching or mentoring others? Remember to put these BIG ROCKS in first or you'll never get them in at all. So, tonight, or in the morning, when you are reflecting on this short story, ask yourself this question, "What are the 'big rocks' in my life?" Then, put those in your jar first.


Creative Thinking 
Some time ago I received a call from a colleague. He was about to give a student a zero for his answer to a physics question, while the student claimed a perfect score. The instructor and the student agreed to an impartial arbiter, and I was selected.I read the examination question: "SHOW HOW IT IS POSSIBLE TO DETERMINE THE HEIGHT OF A TALL BUILDING WITH THE AID OF A BAROMETER." The student had answered, "Take the barometer to the top of the building, attach a long rope to it, lower it to the street, and then bring it up, measuring the length of the rope. The length of the rope is the height of the building." The student really had a strong case for full credit since he had really answered the question completely and correctly! On the other hand, if full credit were given, it could well contribute to a high grade in his physics course and to certify competence in physics, but the answer did not confirm this. I suggested that the student have another try. I gave the student six minutes to answer the question with the warning that the answer should show some knowledge of physics. At the end of five minutes, he had not written anything. I asked if he wished to give up, but he said he had many answers to this problem; he was just thinking of the best one. I excused myself for interrupting him and asked him to please go on. In the next minute, he dashed off his answer which read: "Take the barometer to the top of the building and lean over the edge of the roof. Drop the barometer, timing its fall with a stopwatch. Then, using the formula x=0.5*a*t^^2, calculate the height of the building." At this point, I asked my colleague if he would give up. He conceded, and gave the student almost full credit. While leaving my colleague's office, I recalled that the student had said that he had other answers to the problem, so I asked him what they were. "Well," said the student, "there are many ways of getting the height of a tall building with the aid of a barometer. For example, you could take the barometer out on a sunny day and measure the height of the barometer, the length of its shadow, and the length of the shadow of the building, and by the use of simple proportion, determine the height of the building. "Fine," I said, "and others?" "Yes," said the student, "there is a very basic measurement method you will like. In this method, you take the barometer and begin to walk up the stairs. As you climb the stairs, you mark off the length of the barometer along the wall. You then count the number of marks, and this will give you the height of the building in barometer units." "A very direct method." "Of course. If you want a more sophisticated method, you can tie the barometer to the end of a string, swing it as a pendulum, and determine the value of g at the street level and at the top of the building. From the difference between the two values of g, the height of the building, in principle, can be calculated." "On this same tact, you could take the barometer to the top of the building, attach a long rope to it, lower it to just above the street, and then swing it as a pendulum. You could then calculate the height of the building by the period of the precession". "Finally," he concluded, "there are many other ways of solving the problem. Probably the best," he said, "is to take the barometer to the basement and knock on the superintendent's door. When the superintendent answers, you speak to him as follows: 'Mr. Superintendent, here is a fine barometer. If you will tell me the height of the building, I will give you this barometer." At this point, I asked the student if he really did not know the conventional answer to this question. He admitted that he did, but said that he was fed up with high school and college instructors trying to teach him how to think.


To Fool a Wiseman 
There once was a man who was digging for gold. And he discovered a large streak of gold, deep under his town. But he said to himself, "if word gets out about this, everyone else will grab it". So he tried to devised a plan. "It's easy to fool a fool", he said, "I've done that many times, but there are many wise people in this town, how will I keep them from finding this gold?" After a while, he thought of an ingenious plan. He went across the state and purchased a large load of Iron Pyrite (fools gold). Then he then planted 1000's of pieces all over his town, in rivers, creeks, gullies, and everywhere one could imagine. Then he took the largest piece and ran down the main street screaming, "I'VE FOUND GOLD, I'VE FOUND GOLD." This caused quite a commotion in his little town, and soon dozens of people were out with picks and shovels. In a few days, 100s of pieces were found, and there was a great euphoria covering the town. But when people started taking their pieces to the town jeweler, he gave them the terrible news. "All FAKES." The people were heart broken, their euphoria turned into gloom. But the wise people of the town, who were cautious and not so quick to rush in, they got a good laugh out of it. Then the man who devised the plan, slowly started to buy up all the fake pieces, all the Picks, shovels and other mining equipment. And every once in a while a real piece of gold would surface, but people would take it to him, instead of the town jeweler. And the wise people of the town would scoff whenever a rumor came up about real gold. So he continued to mine to gold in peace, fooling both the fools and the wise men.

Wednesday, 25 July 2012

20 Laboratory Apparatus and Their Uses

Bunsen burner- is a staple part of the standard laboratory apparatus set. It gives off heat through a vertical flame and so is ideal to be used when wanting to warm up test tubes or beakers full of liquids. 

Gauze mats- are used to stand containers or material on when it is normally placed over a tripod. 


Test tubes- are probably one of the most iconic apparatus of a typical laboratory. They are used to combine liquids and also heat them up. 


 
Tongs- are very useful when conducting any experiments that involves either intense heat or harmful substances. The tongs allow you to grip and move things without having to touch it with your hands.


Tripod - is used frequently in the laboratory and is usually accompanied by a gauze mat that is placed on top of it.

Pipette- is used to transfer small quantities of liquids and to accurately drop them into test tubes or beakers.


Forceps - holds or pick up small objects


Graduated cylinder - measures approximate volume of liquids


Condenser - used in distillation



Funnel - used to transfer solids and liquids without spilling



Test-tube holders - for holding test tubes when tubes should not be touched



Volumetric flasks - to measure precise volumes of liquid or to make precise dilutions.



Ring stand (with rings or clamps) - for holding pieces of glassware in place.



Centrifuge - separates materials of varying density



Beaker - a liquid-measuring container


Crucible - used to heat a small amount of a solid substance at a very high temperature



Wire Gauze used to support a container (such as a beaker or flask) during heating.



Clay triangle - a wire frame with porcelain used to support a crucible


Mortar & Pestle - The mortar is the dish and the pestle is the grinder. They are used to crush or grind up chemicals.



FLINT LIGHTER  - Is used to ignite the flame of a BUNSEN BURNER. The gas collects inside the small cup, and the spark created ignites the gas.

Saturday, 21 July 2012

One Direction - More Than This (Up All Night: The Live Tour)

 


[Liam]
I’m broken, do you hear me?
I’m blinded, ‘cause you are everything I see,
I’m dancin’ alone, I’m praying,
That your heart will just turn around,

And as I walk up to your door,
My head turns to face the floor,
‘Cause I can’t look you in the eyes and say,

[Harry]
When he opens his arms and holds you close tonight,
It just won’t feel right,
‘Cause I can love you more than this, yeah,
When he lays you down,
I might just die inside,
It just don’t feel right,
‘Cause I can love you more than this,
Can love you more than this

[Niall]
If I’m louder, would you see me?
Would you lay down
In my arms and rescue me?
‘Cause we are the same
You save me,
When you leave it’s gone again,

[Louis]
And when I see you on the street,
In his arms, I get weak,
My body fails, I’m on my knees,
Prayin’,

[Everyone]
When he opens his arms and holds you close tonight,
It just won’t feel right,
‘Cause I can love you more than this, yeah,
When he lays you down,
I might just die inside,
It just don’t feel right,
‘Cause I can love you more than this, yeah,

[Zayn]
I’ve never had the words to say,
But now I’m askin’ you to stay
For a little while inside my arms,
And as you close your eyes tonight,
I pray that you will see the light,
That’s shining from the stars above,

(And I say)

[Liam]
When he opens his arms and holds you close tonight,
It just won’t feel right,
‘Cause I can love you more than this,

[Zayn]
‘Cause I can love you more than this, yeah

[Everyone]
When he lays you down,
I might just die inside,
It just don’t feel right,
‘Cause I can love you more than this, yeah,

When he opens his arms and holds you close tonight,
It just won’t feel right,
‘Cause I can love you more than this,

When he lays you down,
I might just die inside,
It just don’t feel right,
‘Cause I can love you more than this,
Can love you more than this

Saturday, 14 July 2012

Parts of a Computer and it's Functions

If you use a desktop computer, you might already know that there isn't any single part called the "computer." A computer is really a system of many parts working together. The physical parts, which you can see and touch, are collectively called hardware. (Software, on the other hand, refers to the instructions, or programs, that tell the hardware what to do.)
The illustration below shows the most common hardware in a desktop computer system. Your system may look a little different, but it probably has most of these parts. A laptop computer has similar parts but combines them into a single notebook-sized package.
Picture of a desktop computer system

System unit

The system unit is the core of a computer system. Usually it's a rectangular box placed on or underneath your desk. Inside this box are many electronic components that process information. The most important of these components is the central processing unit (CPU), or microprocessor, which acts as the "brain" of your computer. Another component israndom access memory (RAM), which temporarily stores information that the CPU uses while the computer is on. The information stored in RAM is erased when the computer is turned off.
Almost every other part of your computer connects to the system unit using cables. The cables plug into specific ports (openings), typically on the back of the system unit. Hardware that is not part of the system unit is sometimes called a peripheral device ordevice.
Picture of a system unit

Storage

Your computer has one or more disk drive—devices that store information on a metal or plastic disk. The disk preserves the information even when your computer is turned off.

Hard disk drive

Your computer's hard disk drive stores information on a hard disk, a rigid platter or stack of platters with a magnetic surface. Because hard disks can hold massive amounts of information, they usually serve as your computer's primary means of storage, holding almost all of your programs and files. The hard disk drive is normally located inside the system unit.
Picture of a hard disk driveHard disk drive

CD and DVD drives

Nearly all computers today come equipped with a CD or DVD drive, usually located on the front of the system unit. CD drives use lasers to read (retrieve) data from a CD, and many CD drives can also write (record) data onto CDs. If you have a recordable disk drive, you can store copies of your files on blank CDs. You can also use a CD drive to play music CDs on your computer.
Picture of a CDCD
DVD drives can do everything that CD drives can, plus read DVDs. If you have a DVD drive, you can watch movies on your computer. Many DVD drives can record data onto blank DVDs.
Tip

Tip

If you have a recordable CD or DVD drive, periodically back up (copy) your important files to CDs or DVDs. That way, if your hard disk ever fails, you won't lose your data.

Floppy disk drive

Floppy disk drives store information on floppy disks, also called floppies or diskettes. Compared to CDs and DVDs, floppy disks can store only a small amount of data. They also retrieve information more slowly and are more prone to damage. For these reasons, floppy disk drives are less popular than they used to be, although some computers still include them.
Picture of a floppy diskFloppy disk
Why are floppy disks "floppy"? Even though the outside is made of hard plastic, that's just the sleeve. The disk inside is made of a thin, flexible vinyl material.

Mouse

A mouse is a small device used to point to and select items on your computer screen. Although mice come in many shapes, the typical mouse does look a bit like an actual mouse. It's small, oblong, and connected to the system unit by a long wire that resembles a tail. Some newer mice are wireless.
Picture of a computer mouseMouse
A mouse usually has two buttons: a primary button (usually the left button) and a secondary button. Many mice also have a wheel between the two buttons, which allows you to scroll smoothly through screens of information.
Picture of mouse pointers
When you move the mouse with your hand, a pointer on your screen moves in the same direction. (The pointer's appearance might change depending on where it's positioned on your screen.) When you want to select an item, you point to the item and then click (press and release) the primary button. Pointing and clicking with your mouse is the main way to interact with your computer. For more information, see Using your mouse.

Keyboard

A keyboard is used mainly for typing text into your computer. Like the keyboard on a typewriter, it has keys for letters and numbers, but it also has special keys:
  • The function keys, found on the top row, perform different functions depending on where they are used.
  • The numeric keypad, located on the right side of most keyboards, allows you to enter numbers quickly.
  • The navigation keys, such as the arrow keys, allow you to move your position within a document or webpage.
Picture of a keyboardKeyboard
You can also use your keyboard to perform many of the same tasks you can perform with a mouse. For more information, see Using your keyboard.

Monitor

A monitor displays information in visual form, using text and graphics. The portion of the monitor that displays the information is called the screen. Like a television screen, a computer screen can show still or moving pictures.
There are two basic types of monitors: CRT (cathode ray tube) monitors and LCD (liquid crystal display) monitors. Both types produce sharp images, but LCD monitors have the advantage of being much thinner and lighter. CRT monitors, however, are generally more affordable.
Picture of an LCD monitor and a CRT monitorLCD monitor (left); CRT monitor (right)

Printer

A printer transfers data from a computer onto paper. You don't need a printer to use your computer, but having one allows you to print e‑mail, cards, invitations, announcements, and other materials. Many people also like being able to print their own photos at home.
The two main types of printers are inkjet printers and laser printers. Inkjet printers are the most popular printers for the home. They can print in black and white or in full color and can produce high-quality photographs when used with special paper. Laser printers are faster and generally better able to handle heavy use.
Picture of an inkjet printer and a laser printerInkjet printer (left); laser printer (right)

Speakers

Speakers are used to play sound. They may be built into the system unit or connected with cables. Speakers allow you to listen to music and hear sound effects from your computer.
Picture of computer speakersComputer speakers

Modem

To connect your computer to the Internet, you need a modem. A modem is a device that sends and receives computer information over a telephone line or high-speed cable. Modems are sometimes built into the system unit, but higher-speed modems are usually separate components.
Picture of a cable modemCable modem