Sunday, August 1, 2010

Explore item 19:Library things

1) Harry potter
Harry Potter cannot escape his fate. He and the Dark Lord Voldemort are destined to face each other in a duel – a duel that only one of them will survive. To even stand a chance, Harry must seek out and destroy Voldemort’s four remaining Horcruxes: the fragments of his soul that bind him to the mortal world. Professor Dumbledore, however, is gone, and in his place lies a myriad of rumours and unanswered questions. Unable to rely on anyone but Ron and Hermione, Harry embarks upon a journey that will push his courage, trust and magic skills to their limits.

2)Marley and me
John and Jenny were just beginning their life together. They were young and in love, with a perfect little house and not a care in the world. Then they brought home Marley, a wiggly yellow fur ball of a puppy. Life would never be the same. Marley quickly grew into a barrelling, ninety-seven-pound steamroller of a Labrador retriever, a dog like no other. He crashed through screen doors, gouged through drywall, flung drool on guests, stole womenâTMs undergarments, and ate nearly everything he could get his mouth around, including couches and fine jewellery.
3)Inkheart
Meggie’s father, Mo, has an wonderful and sometimes terrible ability. When he reads aloud from books, he brings the characters to life--literally. Mo discovered his power when Maggie was just a baby. He read so lyrically from the the book Inkheart, that several of the book’s wicked characters ended up blinking and cursing on his cottage floor. Then Mo discovered something even worse--when he read Capricorn and his henchmen out of Inkheart, he accidentally read Meggie’s mother in.
Meggie, now a young lady, knows nothing of her father's bizarre and powerful talent, only that Mo still refuses to read to her. Capricorn, a being so evil he would "feed a bird to a cat on purpose, just to watch it being torn apart," has searched for Meggie's father for years, wanting to twist Mo's powerful talent to his own dark means. Finally, Capricorn realizes that the best way to lure Mo to his remote mountain hideaway is to use his beloved, oblivious daughter Meggie as bait!
4) A man called Dave

A Child Called 'It' is Dave Pelzer’s story is of a child beaten and starved by his emotionally unstable, alcoholic mother: a mother who played tortuous, unpredictable games that left one of her three sons nearly dead. No longer considered a son, or a boy, but an ‘it’, Dave had to learn how to play these games in order to survive. His bed was an old army cot in the basement and when he was allowed food it was scraps from the dogs’ bowl. Throughout, Dave kept alive the dream of finding a family who would love and care for him. This is an inspirational look at the horrors of child abuse and the steadfast determination of one child to survive despite the odds.

5)Twilight
When Bella Swan moves to the gloomy town of Forks and meets Edward Cullen, her life takes a thrilling and terrifying turn. With his porcelain skin, golden eyes, mesmerizing voice, and supernatural gifts, Edward is both irresitible and impenetrable. Up until now, he has managed to keep his true identity hidden, but Bella is determined to uncover his dark secret. What Bella doesn't realize is the closer she gets to him, the more she is putting herself and those around her at risk. And, it might be too late to turn back. . . Deeply seductive and extraordinarily suspenseful, Twilight will have readers riveted right until the very last page is turned.
Advanced ceramics

During the past five years, ceramics has undergone a revolution almost as dramatic as the more familiar one in electronics. Novel approaches to preparing and processing ceramic solids have been developed, ingenious ways of circumventing the age-old problem of brittleness have been introduced, and new markets have begun to open up in such areas as sensors, orthopaedics, photonics, and heat engines.


We are now entering the initial growth phase of the advanced ceramics industry, in which scientific understanding and developments are exploited in diverse areas, completely new applications are appearing, and companies are beginning to compete for market share. Field of ceramics has influenced, or been influenced by, other technical fields, especially chemistry, physics, metallurgy, medicine, and mechanical engineering.
Here are some pictures of ceramics:



CERAMICS AND CHEMISTRY: CERAMIC SYNTHESIS

Traditionally, ceramics have been used in chemistry as catalysts. Today, ceramics are beginning to be used as chemical-specific sensors for the detection of oxygen, hydrogen, carbon monoxide, and more complex organic species such as propane or isobutane.10 They also are being used as durable containers for active chemical and nuclear wastes, the new lead-iron phosphate glasses being a thousand times more resistant to leaching than standard borosilicate glasses.





From figure above.Improved resistance of lead-iron phosphate glass to aqueous corrosion (90°C for 30 days) over conventional borosilicate glass.

Conventional chemical approaches for making fine particulate solids involve colloidal suspension followed by removal of the solvent. But if the suspension is simply dried by heating or evaporation, coarse crystals or agglomerates usually result. An alternative route is through sol-gel chemistry, first used in 1864 by Thomas Graham to make silica gel. It involves three steps: (1) producing a concentrated solution of a metallic salt in a dilute acid (the sol); (2) adjusting the pH, adding a gelling agent, and evaporating the liquid to produce a gel; and (3) calcining the gel under carefully controlled atmospheric conditions to produce fine particles of the requisite ceramic. This approach is especially useful for oxide-based ceramics such as Al2O3, ZrO2, and TiO2. Sol-gel processes have been used to produce a variety of glass and ceramic fibres. Another route particularly appropriate for the production of such ceramic fibers as SiC and Si3N4 involves the thermal degradation of polymers.Other routes for producing ceramic particles involve vapor-phase reactions.

THE FUTURE

This chapter has reviewed the progress made in ceramics over the past 25 years. What of the next 25 years? Predictions are always difficult and usually err on the conservative side because they underestimate scientific ingenuity, capitalist entrepreneurism, and the breakthroughs in understanding or processing capability that open up completely unexpected paths of development. By 2010, photonics will have become a dominant technology based on integrated ceramic devices. Coated-fiber sensors will translate electrical, magnetic, and pressure variations into optical signals for real-time processing.

Ceramics material

Properties: High hardness, strength and wear resistance. Very good insulator. Hard and brittle. Good resistance to corrosion. Good refractoriness.

Examples: Porcelain, Glass, Silicon nitride, pottery, tiles, bricks, abrasive cutting tools, high temperature jet engines components.
Explore item 22: Explore eBooks & Audio eBooks

From http://www.justfreebooks.info , I saw a wide range of books for science. They are all about science and it is good for students who are learning science as it has all the information needed and it is very detailed. There are also pictures and tables given to help students like us to understand more.

I feel that having ebooks is very convenient as we do not need to go to the library and slowly searched the books till we are contented with the content which is very time consuming. In addition,most people have Internet access at home thus reaching for ebooks are even more easy.It's just a click away.You can browse ebooks anywhere,anytime and whenever you want.

Slowly,people tend to visit the library lesser and lesser due to the convenience of ebooks.

Friday, July 30, 2010