Tuesday, July 21, 2009

II Ramayana II


Ramayana, the greatest epic of all times, was written by Maharishi Valmiki over 2000 years ago.

Ramayana tells us the Story of Lord Rama, who came on the Earth as an incarnation of Vishnu. He was born as the son of king Dashratha and Queen Kaushalya. He was the eldest among his brothers- Bharat, Lashman and Shatrughan. He married the daughter of king Janak- Sita and was living happily in Ayodhyaya. It was then when his stepmother, Queen Kaikayi asked Dashrath to make Bharat the king and banish Rama in the forest for 14 years. Rama, being an obedient son, agreed.


His loving wife , Sita and loyal brother , Lakshman followed hin in the jungle. They lived there peacefully untill one day Suparnakha, sister of the demon king Ravana spotted them. She instantly liked the handsome Rama, and approached him. Rama rejected her. Furious, she charged towards Sita, where in Lakshman cut off her nose.


Agitated, Suparnakha went to her brother Ravana, and told him of Sita's extraordinary beauty and the brother's atrocities on her. Ravana kidnapped Sita and brought her to Lanka.


Rama and Lakshman enlisted the help of the monkey king, Sugriva and his general, Hanuman to trace Sita. Hanuman was able to locate Sita in Lanka. Soon, Rama and his monkey army invaded Lanka.


A fierce battle raged. Ravana was helped by his able son, Indrajit and mostrous brother , Kumbhkaran. His another brother Vibhishana , was good at heart, and so he changed sides to be with Rama. In the end , Rama won the battle and rescued Sita.


Rama and Sita were noble rulers of their land and ruled wisely.


We celebrate Dasahara on the day of Rama's victory over Ravana and Diwali on the day Rama returned back to Ayodhyaya.


Tuesday, July 14, 2009

Marvels of Medicine

All of us fall sick sometimes. Medicines cure us and get us back on our feet quickly. But there are many different systems of medicines prevelant in the world today:
Allopathy : also known as the Modern medicine.
Ayurveda : The classic Indian approach to the art of healing.
Homeopathy : propagated by a German Dr. Samuel Hahnemann

Modern Medicine:
Hippocrates is known as the father of medicine. He was the first to suggest that diseases are not divine interventions but natural problems, curable by nature itself.

Steps of a treatment:
When we fall sick, a doctor can cure us. First he needs to ascertain the disease. This is called Diagnosis. He may take help of some tests to accurately diagnose the disease.
Then he will prescribe some medicines in a Prescription.
We must always follow the doctors’ advice.
At times, doctors need to operate on a patient. This is called Surgery

What makes us sick?.
Diseases can be caused due to many reasons. Microorganisms like bacteria and Virus are the main culprits. Some diseases like malaria spread through mosquitoes. Some, like Typhoid are spread by eating dirty food and water. Infectious diseases are diseases that spread from one person to another.
The best way to stay healthy is to eat a balanced diet, personal hygiene and regular exercise. Remember, Prevention is better than cure.

Important types of medicines.
Vaccine: is given to improve the body’s immunity to a particular disease.
Antiseptic: is a substance that is applied to a living tissue or skin to reduce the possibility of infection.
Antibiotic: are substances that kill or inhibit the growth of bacteria. Antibiotics are given to a patient if he has bacterial infection. One must always complete the full course of an antibiotic medicine.

First Aid:
The immediate care given to someone in emergency is called First Aid.
Always keep a first aid box ready in home. A typical First Aid box will contain
1. Bandaid 2. AntiSeptic 3. Cotton wool and bandage 4.Ointment 5. Scissors 6. Common medicines.



Ayurveda, which means "science of life" in Sanskrit, is based on the premise that everything in the universe, including the human body, is comprised of five basic elements: earth, wind, fire, water and space
Ayurveda prescribes natural remedies to cure the diseases. Yoga plays a big part in ancient Indian system of healthcare.
Charaka was a prominent Rishi and the first important physician of India. His book, Charak Samhita, is an important source of Ayurvedic remedies.
Sushruta was an important surgeon of ancient India and his book Sushruta Samhita is an important document on early surgery .


Homeopathy: Homeopathy is a form of alternative medicine , first expounded by german Dr. Samuel Hahnemann. He put forth the idea of “like destroys like” , and created this branch of medicine. Homeopathy is characterised by highly diluted doses of medicine given typically in sugar balls.

Other alternate forms as acupuncture, Siddha medicine etc. also exist throughout the world.

Tuesday, July 7, 2009

Hibernation


Energy is needed all the time.
We all need energy – all the time. Every living animal on Earth is burning energy all the time. Physical activities like walking and breathing burn energy. Pumping blood and digesting food burns energy. Even thinking burns energy. For warm-blooded animals, a lot of energy is burned just keeping our body temperature where we need it. Even when we're sleeping, we're burning energy.

What happens in Winters?
That's the whole reason animals eat -- to gain enough energy to fuel all those processes. The system works fine when there's plenty of fruit on the trees or rabbits to catch and eat . But what happens when winter comes and it becomes very difficult to find food? How do animals survive with few energy sources available?
Winters can be very harsh in many places. Human beings find warmth in heaters, woollen clothes etc., but what do animals do? Where do they get their food from when all the land is covered in snow ?
Animals have different, wonderful strategies to cope with winters. Some migrate, Some Adapt, and yet some hibernate. Smaller animals tend to be more likely to hibernate, because migration would require an enormous amount of energy relative to their body size. Larger animals are less apt to hibernate because of the additional energy required to warm up a large body.

What is Hibernation?
Some animals "hibernate" for part or all of the winter. This is a special, very deep sleep. The animal's body temperature drops, and its heartbeat and breathing slow down. It uses very little energy. In the fall, these animals get ready for winter by eating extra food and storing it as body fat. They use this fat for energy while hibernating. Some also store food like nuts or acorns to eat later in the winter. Bears, skunks, chipmunks, and some bats hibernate. Cold-blooded animals like fish, frogs, snakes and turtles have no way to keep warm during the winter. Snakes and many other reptiles find shelter in holes or burrows, and spend the winter inactive, or dormant. This is similar to hibernation.
Water makes a good shelter for many animals. When the weather gets cold, they move to the bottom of lakes and ponds. There, frogs, turtles and many fish hide under rocks, logs or fallen leaves. They may even bury themselves in the mud. They become dormant. Cold water holds more oxygen than warm water, and the frogs and turtles can breath by absorbing it through their skin.
When an animal enters a hibernationlike state during the summer, it's known as estivation. It's much less common than hibernation. Estivation is like hibernation in hot weather. Animals that live in deserts or tropical climates practice estivation. It may not occur solely because of food supply issues, as with hibernation, but because the conditions become too hot and dry for the animal to survive. The process typically involves burrowing into the ground, where the temperature stays cool, and reducing metabolic activity in a similar manner to hibernation.

How does hibernation work ?
Hibernating animals have a special substance in the blood called hibernationinducement trigger, or HIT. This substance becomes active in the fall, when the days becomecooler and shorter. When HIT becomes active, the animals start preparing for winter. Someanimals store food so that they can eat when they wake up, and some animals eat a lot in latesummer and fall to add excess fat to their bodies. This fat keeps them warmer and acts as asource of energy while they are sleeping. Some animals also make changes to the placeswhere they will sleep (dens). They add leaves and grasses to keep them warm.

Preparing for Hibernation
Preparation is required to hibernate successfully. Some animals prepare a den (also known as a hibernacula) and line it with insulating material, just as leaves or mud. Ground squirrels and lemurs do this. Polar bears dig tunnels in the snow. Other bears might spend the winter in a hollow beside a tree or a shallow cave, leaving them partly exposed to the weather. Bats are well-known for wintering in caves or attics.
Next comes food storage. Food can be kept in the den if it's nonperishable, but this requires the animal to wake up briefly during the winter to eat. Another option is to eat a large amount of food starting in late summer, building up a reserve of internal fat.
Several other things occur when an animal is hibernating:Heart rate drops to as little as 2.5 percent of its usual level. A chipmunk's heart rate slows to five beats per minute from the usual 200.Breathing rate drops by 50 percent to 100 percent. Yes, 100 percent. Some animals stop breathing entirely. A few reptiles go their entire hibernation period without breathing, and even mammals have shown the ability to survive with drastically reduced oxygen supplies. Consciousness is greatly diminished. This varies by species, but many hibernating animals are completely oblivious to their surroundings and are nearly impossible to wake up.
If you were to wake up a hibernating animal midwinter, you would be effectively killing it. It would use up so much energy warming itself up in order to awaken that it would have no chance of making it to spring even if it could re-enter hibernation.

Tuesday, April 14, 2009

Cartoons!!!

The word cartoon has various meanings, based on several very different forms of visual art and illustration. The word is French and describes the cardboard 'carton', on which draughtspersons used to draw.

The term, Cartoon, has evolved over time. The original meaning was in fine art, and there cartoon meant a preparatory drawing for a piece of art such as a painting or tapestry.
The somewhat more modern meaning was that of humorous illustrations in magazines and newspapers. Even more recently there are now several contemporary meanings, including creative visual work for print media, for electronic media, and even animated films and animated digital media.

We can divide Cartoons broadly into three categories:

Caricatures: The comic strips based on day to day life, and politics, to elicit laughter and thought, is often full of subtle satire. The common man by R.K.Laxman is an exemplary example of Caricatures.

Comics: Comics are a sequence of caricatures designed to tell a story using character of its’ own. Comics can be short – strips like Dennis the Menace or long comic books, like Tintin.

Animation pictures: The new cartoons of today, the Animation movies we see on our television screens take a long route from the imaginations of its’ creators to the seemingly realistic movements on your screen.
The original animation was a kid toy, a book whose leaves could be scrolled rapidly. On each page there were figures slightly different from the previous ones, and through the rapid scrolling they merged one with the other. It was an optic illusion. Modern technology is much more evolved, but it works on the same principle: static images presented rapidly and successively.
Mickey Mouse opened the Golden Age of the cartoons that lasted until the middle of the '50s. Disney was followed by the Fleisher Brothers with Popeye the Sailor, the spinach eating sailor with steel muscles, and after them, an invasion of the characters preferred by today's children: Tom and Jerry, Road Runner, Bugs Bunny, Duffy Duck, Sylvester, Tweety and others. Later, the Simpsons with their odd heads boosted again the popularity of the cartoons.
The first feature cartoon, in 1937, was "Snow White and the Seven Dwarfs", which had a huge success. Other feature cartoons followed and, in 1994, for example, Lion King, made at Walt Disney studios, had one of the grossest revenues of the year.

How is an Animation movie made:
The first thing that is done is that the story itself is developed as what is called a "storyboard". This is literally a giant sized comic strip. As the story is developed the artist adds new drawings to this storyboard. Sometimes the entire story is known beforehand and other times it is developed as they go along. These drawings are pinned into a cork board so it is very easy to make changes as they go along.
After the storyboard is laid out, backgrounds are made for the cartoon. These are painted on cardboard with either tempera, acrylic or sometimes even oil paints. These backgrounds are where the characters of the cartoon will be performing their movements and are extremely large to allow for all the motion that may be required. The camera will then move across the background as the characters move across it.
Before the drawing of the characters even begins, the voices of the characters are recorded on tape and then transferred to magnetic film. The film is fed through a sound reader and every syllable is recorded on an exposure sheet. This is required in order to perform the synchronization between the sound and the picture. Each frame of film must be synchronized separately. This is extremely time consuming.
Finally after all this, the hard work begins. Yes, it gets harder. Every second of film consists of 24 frames with as many as 24 different drawings. That means that an hour animated film can contain as many as 86,400 drawings. Taking these frames, they are fed through a projector to make sure that the movement of each character for each second is smooth. If there are any problems, certain drawings may have to be redone. Note that these drawings are all in black and white.
If the movements of the frames passes the quality control test, it is at that time that color is added to all these drawings, all done by hand.They are then superimposed onto the backgrounds.
The actual filming is done on what is called an animation stand. Many times the picture will be divided into several levels which are separated by about 12 inches. Each part of the background is on a different level so that a 3 dimensional effect can be achieved.
Finally, the film is fed back through a projector which is showing each filmed board at a very fast rate. This gives the cartoon the feeling of motion.

Next time you watch a cartoon, see if you can pick any of this out. If the cartoon is well done, you won't be able to.

Tuesday, April 7, 2009

Energy and its Sources

ENERGY

What is Energy? It is the ability to do work. Energy can be harnessed from a variety of sources. A few of the important ones are:

Renewable Energy

  • Solar: Sun provide us with free unlimited energy. Disadvantages: This energy is not constant, but variable, and a large area is required to collect any decent amount of energy.
  • Wind: Winds are caused by uneven heating of earth by Sun. Their energy can be harnessed by wind mills.
  • Hydro: Harnessing energy hidden in fast moving water like in rapids or waterfalls is possible. The energy generated depends on the flow/fall of the water.

Non- Renewable Energy

  • Crude Oil : is made from remains of plants and animals. Reservoirs are drilled, and Refineries make many products from oil viz. petrol, diesel, jetfuel, pet. Jelly, ink, crayons, deodorants, tires etc.
  • Natural Gas: Colorless, Odourless, Tasteless. Mercaptan is added to the gas to provide a rotten smell. If compressed, this gas becomes liquid and can be stored in cylinders. It is also cleaner than other fossil fuels.
  • Coal: Creaated by remains of ancient plants and animals in swampy places. Is mined either on surface or through deep mining.
  • Nuclear: Energy can be created through rare and special elements like Uranium.

Electricity :
Electricity is a secondary source of energy i.e. we get it from conversion of other energy sources.
B enjamin Franklin discovered the phenomenon and Thoman Edison changed lives by inventing the light bulb. Electricity travels in circuits.

Since Energy plays such a crucial part in our lives, we must make sure not to waste it. We must use Electricity judiciously and use CFLs (Compact Flouroscent Light) where possible. Petrol and other fossil fuels should be consumed as less as possible since they can't be replenished.



Wednesday, April 1, 2009

Extremes of Life

Oldest Living Tree: Bristle ConePines in California USA. The oldest specimen, Methuselah is almost 5000 years old!!!

Animal with longest life span:Turtles, around 200 years old

Fastest Animal: Cheetal, 70 mph for short distances

Fastest Bird: Peregrine Falcon, clocked at 124 mph flying and 168 mph while swooping.

Fastest Fish: Sail Fish

Fastest Growing Plant: Bamboo can grow upto 3 ft in a single day!

Largest Animal: Blue Whale

Largest Land animal: African Elephant

Tallest animal: Girraffe , 19 mts. tall average.

Biggest Bird: Ostrich

Smallest Bird: HummingBird

Longest Hibernation: Marmot, for 9 months.

Fastest Train: MagLev, Shanghai.

Fastest Car: Bugatti Veyron.

Tallest Building: Al Burj, Dubai. 2950 ft.