Tuesday, 7 April 2015

How To Learn New Words Quickly and Efficiently

How To Learn New Words Quickly and Efficiently



Neuroscientists uncover the secret of how our brains learn new words.
The brain is able to learn words so quickly because it remembers how the whole word ‘looks’, a new study finds.
The researchers found that a small part of our brain is holistically tuned to recognising words as a whole, rather than as parts or through individual letters.
“We are not recognizing words by quickly spelling them out or identifying parts of words, as some researchers have suggested.
Instead, neurons in a small brain area remember how the whole word looks — using what could be called a visual dictionary,”
A part of the brain called the ‘visual word form area’ is vital to how we learn new words.
Close by in the visual cortex is the fusiform gyrus, an area which helps us recognise faces.
“One area is selective for a whole face, allowing us to quickly recognize people, and the other is selective for a whole word, which helps us read quickly.”
Learn new words
For the study, 25 participants were asked to learn new words that were actually nonsense.
Their brains were scanned before and after the training to look at how it had changed.
The results showed that after learning the visual word form area began to respond to the nonsense words as though they were real words.
“This study is the first of its kind to show how neurons change their tuning with learning words, demonstrating the brain’s plasticity.”
People with reading disabilities may find it easier to learn words as a whole, anecdotal evidence suggests, rather than breaking them down.
“For people who cannot learn words by phonetically spelling them out — which is the usual method for teaching reading — learning the whole word as a visual object may be a good strategy.
The visual word form area does not care how the word sounds, just how the letters of the word look together.
The fact that this kind of learning only happens in one very small part of the brain is a nice example of selective plasticity in the brain.”

Monday, 23 March 2015

Beware! Junk Food can Decrease your Concentration Span

Beware! Junk Food can Decrease your Concentration Span



Junk food is tempting and tasty, so, much so, that while you are reading this article, your brain is already thinking about junk food. Right? But the harmful effects are many. One of them is that it decreases our concentration span.

Being a student, you cannot afford to lose your focus from study. So, if you thought that junk food is a great treat to your taste buds, then you must do a reality check.

Overconsumption of junk food can affect your ability to concentrate better, but that’s not all; our memory and behavior are also affected. According to experts, addiction to junk food can invite aggression in students which is not a positive sign.

What is more surprising is that even parents are encouraging the consumption of junk food. Healthy Tiffin boxes have been smoothly replaced by junk food packets which are easily accessible. Thus, the nutritional value has gone down, and health is at stake. If there is a lack of nutrition, how can we expect children to concentrate better on their studies?

Obesity is another major concern among parents. Don’t you think junk food is one of the potential reasons which contribute towards this problem? Obviously, it does! If this is not enough, junk food can also lead to dental problems.


School is the best place to learn things; hence, schools should ban or limit junk foods. As a parent, encourage your children to eat healthy. As a child, you must be aware of the nutritional value and choose between foods which are right for you. Here’s hoping you eat healthy.

Monday, 16 March 2015

How to Deal With Exam Stress



Exams are just to assess your preparation. So just relax, it is not the end of the world if you do not fare well in them. First and most important is your preparation before exam is to make sure you have prepared well and know the important topics well. On the day of the exam, completely avoid last minute mugging and stressing. You should have a good sleep of minimum 8 hours the previous night. The steps important for having a relaxed mind during exam are

1
Organize. Make sure you have all the things necessary for the exam: your stationery, your identity ticket, your watch etc. Last-minute searching for things can stress your mind further and create panic during the exam which can be disastrous.



2
Diet. Before you go to the exam, eat foods that are energy producing and at the same time not too heavy on your stomach that make you sleepy in the examination hall. Never go in on an empty stomach as you can end up concentrating more on your hunger than your exam paper. Fruits and proteins are good source of energy. Avoid intake of heavy carbohydrates like rice and potatoes which will make you sleepy. If possible carry a water bottle to the exam hall to rehydrate.



3
Relax. One hour before the exam, relax!! Don't stress yourself feeding more information to your already worked-up brain. Whatever you have learned, be confident of it and try to picture a calm stream, or take some deep breaths. You have done your preparation and now you should prepare yourself to give your best. A tired mind will do no good, so it is necessary to go into the hall with a refreshed mind. You have worked hard for it and nobody can take away your hard work. What you give always comes back to you. Remember this nature's law. If you not prepared well, let your mind accept the fact. It is not possible to go unprepared and expect no stress and good results. Instead of trying to revise that very last point you forgot to learn, try and briefly go over the different topics in your head so that way you keep an organised and open mind without putting pressure on yourself to learn that other point. The chances are you'll only remember what you learned just before the exam and panic with the other parts.



4
Plan. Once you get the question paper in your hand, read all the questions and make a quick rough plan how you are going to invest your time for doing your best. Mark the questions which you know the best and attempt them first. In this manner, you will increase your confidence further. Appreciate yourself for remembering the solutions and answers; your brain will work better. Never curse yourself if you forgot or didn't study something which you thought about studying. Remember it is too late now, and that your focus should be on the present moment.



5
Cross-check. It is very, very important to check your answers again in the end. The last 15 minutes should be to review your paper. Recheck every answer with patience and you will be surprised by how many careless faults you come across. Make the necessary corrections.



6
Forget. Most of the time after the exam is over, we worry about the results or waste time discussing what our friends have written. Realize that the time to do something about the results passed when you handed the answer sheet to the examiner. Knowing how your friend did on the paper will only add more worry. Chances are that even the friend who told you he did not do well would have lied to you. Accept that everybody tries their best in the exams. Regardless, you are losing your time and peace of mind trying to know what others did or spending energy on worrying which is already past. Concentrate on how you will face your next exam or how you are going to spend your time efficiently.


Thursday, 8 January 2015

Polygon Properties

What is a Polygon?
A closed plane figure made up of several line segments that are joined together. The sides do not cross each other. Exactly two sides meet at every vertex.

Types of Polygons
Regular - all angles are equal and all sides are the same length. Regular polygons are both equiangular and equilateral.
Equiangular - all angles are equal.
Equilateral - all sides are the same length.
Convex - a straight line drawn through a convex polygoncrosses at most two sides. Every interior angle is less than 180°.
Concave - you can draw at least one straight line through a concave polygon that crosses more than two sides. At least one interior angle is more than 180°.
Polygon Formulas
(N = # of sides and S = length from center to a corner)
Area of a regular polygon = (1/2) N sin(360°/N) S2
Sum of the interior angles of a polygon = (N - 2) x 180°
The number of diagonals in a polygon = 1/2 N(N-3)
The number of triangles (when you draw all the diagonals from one vertex) in a polygon = (N - 2)
Polygon Parts
Side - one of the line segments that make up the polygon.
Vertex - point where two sides meet. Two or more of these points are called vertices.
Diagonal - a line connecting two vertices that isn't a side.
Interior Angle - Angle formed by two adjacent sides inside the polygon.
Exterior Angle - Angle formed by two adjacent sides outside the polygon.
Special PolygonsSpecial Quadrilaterals - square, rhombus, parallelogram, rectangle, and the trapezoid.
Special Triangles - right, equilateral, isosceles, scalene, acute, obtuse.
Polygon Names
Generally accepted names
Sides
Name
n
N-gon
3
Triangle
4
Quadrilateral
5
Pentagon
6
Hexagon
7
Heptagon
8
Octagon
10
Decagon
12
Dodecagon
Names for other polygons have been proposed.
Sides
Name
9
Nonagon, Enneagon
11
Undecagon, Hendecagon
13
Tridecagon, Triskaidecagon
14
Tetradecagon, Tetrakaidecagon
15
Pentadecagon, Pentakaidecagon
16
Hexadecagon, Hexakaidecagon
17
Heptadecagon, Heptakaidecagon
18
Octadecagon, Octakaidecagon
19
Enneadecagon, Enneakaidecagon
20
Icosagon
30
Triacontagon
40
Tetracontagon
50
Pentacontagon
60
Hexacontagon
70
Heptacontagon
80
Octacontagon
90
Enneacontagon
100
Hectogon, Hecatontagon
1,000
Chiliagon
10,000
Myriagon
To construct a name, combine the prefix+suffix
Sides
Prefix
20
Icosikai...
30
Triacontakai...
40
Tetracontakai...
50
Pentacontakai...
60
Hexacontakai...
70
Heptacontakai...
80
Octacontakai...
90
Enneacontakai...
+
Sides
Suffix
+1
...henagon
+2
...digon
+3
...trigon
+4
...tetragon
+5
...pentagon
+6
...hexagon
+7
...heptagon
+8
...octagon
+9
...enneagon
Examples:
46 sided polygon - Tetracontakaihexagon
28 sided polygon - Icosikaioctagon

However, many people use the form n-gon, as in 46-gon, or 28-gon instead of these names.