Monday, September 15, 2008

KNOW YOUR SANTA CLAUS BETTER...!!!


The American version of the Santa Claus figure received its inspiration and its name from the Dutch legend of Sinter Klaas, brought by settlers to New York in the 17th century.
As early as 1773 the name appeared in the American press as "St. A Claus," but it was the popular author Washington Irving who gave Americans their first detailed information about the Dutch version of Saint Nicholas. In his History of New York, published in 1809 under the pseudonym Diedrich Knickerbocker, Irving described the arrival of the saint on horseback (unaccompanied by Black Peter) each Eve of Saint Nicholas.
This Dutch-American Saint Nick achieved his fully Americanized form in 1823 in the poem A Visit From Saint Nicholas more commonly known as The Night Before Christmas by writer Clement Clarke Moore. Moore included such details as the names of the reindeer; Santa Claus's laughs, winks, and nods; and the method by which Saint Nicholas, referred to as an elf, returns up the chimney. (Moore's phrase "lays his finger aside of his nose" was drawn directly from Irving's 1809 description.)
The American image of Santa Claus was further elaborated by illustrator Thomas Nast, who depicted a rotund Santa for Christmas issues of Harper's magazine from the 1860s to the 1880s. Nast added such details as Santa's workshop at the North Pole and Santa's list of the good and bad children of the world. A human-sized version of Santa Claus, rather than the elf of Moore's poem, was depicted in a series of illustrations for Coca-Cola advertisements introduced in 1931. In modern versions of the Santa Claus legend, only his toy-shop workers are elves. Rudolph, the ninth reindeer, with a red and shiny nose, was invented in 1939 by an advertising writer for the Montgomery Ward Company.
In looking for the historical roots of Santa Claus, one must go very deep in the past. One discovers that Santa Claus as we know him is a combination of many different legends and mythical creatures.
The basis for the Christian-era Santa Claus is Bishop Nicholas of Smyrna (Izmir), in what is now Turkey. Nicholas lived in the 4th century A.D. He was very rich, generous, and loving toward children. Often he gave joy to poor children by throwing gifts in through their windows.
The Orthodox Church later raised St. Nicholas, miracle worker, to a position of great esteem. It was in his honor that Russia's oldest church, for example, was built. For its part, the Roman Catholic Church honored Nicholas as one who helped children and the poor. St. Nicholas became the patron saint of children and seafarers. His name day is December 6th.
In the Protestant areas of central and northern Germany, St. Nicholas later became known as der Weinachtsmann. In England he came to be called Father Christmas. St. Nicholas made his way to the United States with Dutch immigrants, and began to be referred to as Santa Claus.
In North American poetry and illustrations, Santa Claus, in his white beard, red jacket and pompom-topped cap, would sally forth on the night before Christmas in his sleigh, pulled by eight reindeer, and climb down chimneys to leave his gifts in stockings children set out on the fireplace's mantelpiece.
Children naturally wanted to know where Santa Claus actually came from. Where did he live when he wasn't delivering presents? Those questions gave rise to the legend that Santa Claus lived at the North Pole, where his Christmas-gift workshop was also located.
In 1925, since grazing reindeer would not be possible at the North Pole, newspapers revealed that Santa Claus in fact lived in Finnish Lapland. "Uncle Markus", Markus Rautio, who compared the popular "Children's hour" on Finnish public radio, revealed the great secret for the first time in 1927: Santa Claus lives on Lapland's Korvatunturi - "Ear Fell"
The fell, which is situated directly on Finland's eastern frontier, somewhat resembles a hare's ears - which are in fact Santa Claus's ears, with which he listens to hear if the world's children are being nice. Santa has the assistance of a busy group of elves, who have quite their own history in Scandinanvian legend.
Over the centuries, customs from different parts of the Northern Hemisphere thus came together and created the whole world's Santa Claus - the ageless, timeless, deathless white-bearded man who gives out gifts on Christmas and always returns to Korvatunturi in Finnish Lapland.
Since the 1950s, Santa has happily sojourned at Napapiiri, near Rovaniemi, at times other than Christmas, to meet children and the young at heart. By 1985 his visits to Napapiiri had become so regular that he established his own Santa Claus Office there. He comes there every day of the year to hear what children want for Christmas and to talk with children who have arrived from around the world. Santa Claus Village is also the location of Santa's main Post Office, which receives children's letters from the four corners of the world.

why do u dream...???


The Falling Asleep Process
During the day when we are a awake, our body and brain are working tirelessly to operate our body, and as they do so they slowly degrade at a cellular level. A person will get progressively tired from this bodily breakdown, because sleep gives us a chance to build and replace the cells and resolve our end of day homeostatic imbalances.
If you have not slept for a while, the decrease in the efficiency and effectiveness of the body begins to tell, and you will begin to feel sleepy as less energy is available to you. The longer we stay up the more likely we will fall asleep.
If certain conditions prevail, like a state of inactivity or relaxing in a warm dry place, there is a higher chance of us falling asleep due to the preferable conditions for us to do so.
Sleeping
When we fall asleep, our metabolic rate slows down, as does almost every other function across the board, we effectively go into hibernation mode. The amount of adrenaline in our body promoting awareness decreases and somatotrophin, controlling the repair of tissue is more abundant. This is effectively the healing process of sleep that revitalises us.
The synaptic nerve connections containing recollections about the last day are also strengthened, hence when you wake up the more you realised you did yesterday. This localised area of memory is what many of our dreams consist of, our past recollections of the day. You may have dreamt something twice, and on the second time it was only because you thought of that first dream the day before you dreamt the second. When looking at it like this, it confirms the reason why you have the same dream, your conscious thought about it accesses that part of the brain thus 'remembers' it at night.
Dreams Telling the Future?
Some people believe that dreams tell the future. But, when 6 billion people dream every night, there is bound to be a coincidence when there are trillions of dreams every year. Those people who have dreamed of winning the lottery are one of many.
I, personally don't believe they tell the future, though could be a sign of intelligence, the brain interpreting possibilities in the future from the knowledge of past events. This would be perfectly viable, as it would be a case of the brain 'adapting' to its future environment, and preparing you for the possible future.
REM
REM stands for rapid eye movement and is the points in time during sleep where dreams occur. They occur after periods of deep sleep.
As suggested, rapid eye movement occurs in REM, while the body is under a state of paralysis.
In effect, our brain takes us on a virtual reality of our thoughts while it steadily repairs itself for the next day. The most vivid and deepest dreams will occur in the periods between REM while drowsy, almost conscious dreams occur in the REM stages.
Our Environment Outside Sleep
Have you ever had a dream where someone next door is playing music, and the music is conveniently woven into your dream? This is your body trying to lessen the chances of you awakening while it is repairing itself.
However, sleep deprived people go into much deeper sleep, and may not detect such noises. The overriding point here is, that sleep is essential to the body, and that there are compensations made to our usual behaviour (like paralysis) that enables our body to do what is required for itself.
Sleep Troubles
The older we get, the less sleep we require. Teenagers buck the trends in needing the most sleep of us all, due to the growth spurt occurring at puberty that involves a larger turnover of materials and energy.
Newborn babies can sleep up to 60% of the day
Adults require around 7 hours minimum
With aging, the amount required is less due to the gradual degeneration of parts of the body that are not getting repaired.
Certain drugs are available to induce sleeping, but most are addictive and require controlled and responsible use. The next page looks at the works of famous past neurologists like Carl Gustav Jung and Sigmund Freud, who both actively pursued the way in which we dream as a career in neurology.

want to impress girls......???


Everyone can name someone who's nice, pretty, smart, funny, etc. Want to impress that certain girl? Here's what to do and what not to do.
Steps


Be well-groomed. Brush your teeth, floss, shower, wash your hair, and apply acne medicine (if you have a problem with your skin) daily. Don't wear your pants off your butt, it's not that attractive to the majority of girls. This is essential if you are even going to approach an attractive girl. Wear clean, attractive clothes (if in doubt, get an older sister or close female friend to help you in this department).
Have a good attitude. No girl likes to watch a guy put on a show, so be yourself. Don't try to impress everyone - girls like humble guys. At the same time, a sense of humor is always a plus.
Show respect. If you respect everyone and give them their space, they'll all respect you. With girls, it works even better. If they see you respecting everyone, and not getting pushed around while you're at it, they will be reassured that you will treat them right. Be kind to all.
Have good conversations. Don't talk about how you beat the big-bad-boss on level 23 gazillion of a video game...unless you know them well enough that you know they play that game, or are at least semi-interested (otherwise, it's just a big jumble to her). Try to aim for you both to be speaking 50% of the time, but make sure that you are saying something worthwhile; it's not attractive when only one person talks endlessly.
Show interest in her - let her talk. The #1 mistake when talking to a girl is focusing on yourself. Girls are way more comfortable when they talk about common interests. Ask about their interests, hobbies, favorite books, music, etc. but not in that stalker kind of way. If she asks you a question, answer it in a few, short sentences and then redirect the question back at her. This engages her in the conversation. When in doubt, compliment her.
Try flirting! If you both make eye contact, do not be the one to look away, but do not stare for too long. When you both make eye contact, just give a slight smile. She may look away and she might blush a little. Be careful though; you don't want to stare her down. A good move is to look away, and if she likes you she will shoot you glances. Watch for that.
Respect her friends and their ideas and opinions. Always speak highly of her and never talk trash about her. It will damage her reputation and yours and she'll possibly dump you. Of course, her friends are going to tell her that you trash talked her. Hopefully then it will work both ways - she will be tolerant of your friends. Be careful not to compliment her friends too much, however. Example: You may say "Your friends seem cool. We should hang out with them and my friends some time, I think they'd get along". You may not say "Sally is so hot. She has the nicest eyes".
Have your friends be nice to her It's a fantastic thing when your friends don't make a total fool of you. Warn them ahead of time and avoid topics pertaining to embarrassing moments of your past or awkward jokes that make very little sense.
Be polite to her parents. Be kind to everyone, especially them. Don't be too over-the-top charming with the parents, however, or they'll think that you have something to hide.
Don't criticize her. Unless she asks for constructive criticism.
Be romantic, but not over the top. If you've been dating for a while you may attempt a grand romantic gesture (note: "A while"=a month MINIMUM) otherwise, you'll look like a stalker.
Start talking to her casually. If you don't know her, make friendly conversation. Ask for the time, and/or compliment her watch.
Do not play "hard to get". Sure, you'll get their attention for a day or two then after a while, the girl will end up frustrated or think that you hate her for whatever reason, and she'll think you don't find interest in her anymore. Or if she likes a guy who's like that, her friends might not like you because you're acting like a jerk (this happens way too much).
Be careful with what you say. Remember, Hotty McHotterson is not your pal Lenny. Do not discuss bodily functions in her presence, or make jokes of a sexual nature unless she starts doing so.
Hum a few bars of a song she likes around her. She might think of you whenever she hears that song. And she'll probably be impressed by your good taste in music. Some girls have actually dumped guys or stopped liking guys when they insulted the music they like. So, it's OK not to like her music, but don't be insulting her favorite singer/band! Try to agree with her as much as possible but not so over the top that she knows your not being yourself. Make sure the song is not overtly feminine however. For instance, a Killers song is okay, an Ashley Tisdale song, not so much.
Start an inside joke with her! She will feel included and become closer to you. It also gives you an easy-to-come-up-with conversation starter. Try not to overuse it and kill the joke.
End later meetings with a hug, or plans to meet some other time, if you can.
Do not tell her that you "like her". Ask her out. If she rejects you, all is well. Example: You: "Betty, want to go to dinner on Saturday night?" Betty: "Sorry, I just think of you as a friend" You: "Oh, no offense. A bunch of us were talking about going, and I thought you might like to join us."
Try to get her attentions to your plus and away from minus , but be original !!!
Touch her ocassionally, like on the shoulder or hand.(but be sure to do it in a non-threatening way)!
Opposites attract. Be a courageous gentleman, not coy like a lady might be. Stand up for her,

Tips


If you hold a girl around her hips, it will seem like a romantic move for her. Girls LOVE romantic moves. She will feel important, and that someone actually likes her. If she says to stop, stop. Nothing is worse then then a girl seeing you as a harrasser. If she acts a little odd, stop. Don't take it personally because some girls just don't know how to act around guys. Do it another day if this happens.
Show sympathy and affection. If the girl you really enjoy being around is sad or hurt, give her a quick hug. Don't just say that you're sorry and you hope she feels better. Hold your left arm around her waist, right hand at the base of her neck or holding her head.
If you have braces, glasses and acne... don't be disheartened! Wear contacts, use some Proactiv/Accutane, and voila. Girls put a lot of effort into their appearance, perhaps you should do the same. But don't think just because you have braces, glasses, or acne, that the world is over, sometimes it works! Many people believe that braces are a fashion statement!
Have good posture!
Don't act tough or try to be a thug. This doesn't attract girls.
Don't follow her around everywhere. It automatically gives you a reputation as a stalker, and it will freak her out. Even following her just a little can create a stalker rep., depending on how you act. How you act can determine weather she will actually want you to be around her all the time or if even just seeing your face is too much contact. if you know she see's you as a stalker, lay off because trying to do damage control tends to just worsen your situation, instead try to get a friend of your or of hers to help your issue.
If she just doesn't get that you like her (which most likely won't happen because girls are pretty good at detecting this kind of stuff!) drop hints.
Don't play games. Waiting a few days to call her , showing up a little late to things or anything like that is only proving you are unreliable, a fake and a loser. Likewise, don't tolerate it if she does any of these things to you.
Use correct grammar when texting her or talking to her. If you don't then she will think that you aren't very intelligent and that will turn certain girls off.
While it's important to connect to her friends, you must avoid coming off as a player. If a girl's friends do not approve of you, this will influence her opinion of you.
Don't be weird around her.
Don't be a fake.

Warnings


If you have followed all the steps above and it didn't work, don't feel disheartened. Be proud that you made an effort and accept that it wasn't meant to be. If you decide to still be friends, don't be bitter if she moves on to a new guy.
Also, it says above that some girls like to talk about themselves- remember, some girls do. Some also would rather not have you obsessing about her hobbies, sports, etc. Be cool. Relate what she's saying to something about you, and then continue the conversation.
[Remember to talk about yourself and your own hobbies etc. That way you come off as a good conversationalist and as a person with a life.]
Every girl is different! Find out if she likes tattoos before you show her the skull and crossbones tattoo on your chest! (It's probably a bad idea to get a skull and crossbones tattoo on your chest (or elsewhere))
Never rush her or pressure her or show her a bad attitude.
Don't talk about her weight or ask her anything related to this subject. Even the girls with the most attractive bodies have insecurities. Even a comment intended as a joke could seriously hurt her feelings. Leave this subject alone.
At the same time, keep your own weight in check. Eat healthfully and work out. Don't go too crazy with the body building, but being toned never hurts. Watch out for skinny-fat (where you are skinny but flabby).
Girls love confident guys, but don't be cocky. A cocky guy turns girls off.
If you have problems with shyness, think of the most confident person you know and of what they would do in each situation. Don't be fake, just change your mindset.
Girls like that you care enough to buy them something. Don't go overboard and get flowers for her unless the time calls for it or she is very likely to think you did something wrong.
Some girls don't really know what to talk about with a guy so they might tend to talk about things you don't care about or go on and on about who said what. Don't be mean about it even though you're fighting boredom because it could of taken her a lot of courage to talk to you. Just show interest and change the subject to something more interesting, or politely exit the conversation.
Do not chew gum when talking to her. You should throw it away, if there are no trash bins, do not chew with your mouth open, pop, or blow bubbles.

how to impress guys..???


Not really sure how to catch his attention? Here's how to impress him and show him that you're confident and happy


Smile if you get near him or see him once he looks at you.
Twirl your hair or talk to your fellow classmate acting happy. 'Do not look sad or change your tone. A guy could notice that easily.
Make the first move. Most girls don't think they should, but it's normally worth it. A guy would love to know that a girl isn't so shy and is setting a comfortable environment around him.
Ask him a question. Guys love that a girl is actually the one who flirts with him first. Once you get to know him better, don't be afraid to start giving him hugs and such because it will help the guy know you like him.
Compliment him. You could say, "I like your shirt," or, "I love your hair," but make it kind of casual, guys like feeling confident.
Also act as if your flirting, but when you go up to him, just compliment him on something you admire him for. He will feel less pressured to go to you and talk then

TIPS>>>


Be yourself. Don't act like someone you're not. Guys really don't like that.
Don't be afraid to be different either. Most guys prefer girls who are not the exact same as every other girl on the planet. Don't feel like you have to fit all the latest trends or do what the popular kids do.
Try to look your best when doing this. Do not let other girls get in the way of you trying to impress your crush/ex-crush.
Scrunch hair, curl hair, straight and shiny, or do a messy do. It's a hot trend for guys.
Do not wear with tight shirts or short skirts all the time when you want to impress him. All he will be doing is checking you out. Guys don't remember what you wear and really don't care.
Guys always like a cute smile and a flirtatious scent.
Try to look as cute as possible without getting all of the other guys to look at you.
Make sure that you aren't impressing the wrong guy.
If you have tried to get the same guy once before and failed, try looking cute every day and ignore him. He will pick up that you really care for him.
Do not try too hard. This is a major turn off, and it makes it look like you're obsessed. Even if you are obsessed, you don't want to show it.
Don't act exactly like him, he's going to think your trying too hard, and boys, they don't play that, they want a unique individual just try to stay yourself just like you would with your guy friends, just a bit more flirtacious.
WARNING

Don't act too flirty with him, just enough for him to take the bait.
Don't flirt with his best friend/friends ever.
Don't physically hurt him if he flirted with you. This isn't grade school. Be nice, be gentle, make him smile, not cry.
IMPORTANT**Don't forget that us guys (mostly) fend for ourselves, and (most) girls wait for guys to ask. So some guys might be a little shy around you, but guarentee that he'll lose it in the first month or so, just give it time.
Don't feel weird when you smile. Us guys think it's one of the cutest things in the world when you smile.
If your trying to impress your ex then do something that will make him remember when yall were going out. That will let the guy know that you really like him and might get his attention
When you're walking together down the halls, stay close to his side. Don't make a big deal of it, act natural. This will show him you aren't afraid to be close to him.
Act nice to his friends. He will see that you are a nice person but dont flirt with his friends or he'll get the wrong message.

want to lose weight...???


Want a flat tummy? Read this article. We will explain everything that you need to know to accomplish your aim! This article explains all the concepts of weight loss and how you can “actually” and “practically” loose weight.If you have tried to loose weight in the past and did not get results, it is probably because you were doing something wrong. There is a LOT of weight loss advice out there! Most of this advice is just a scam! There are a lot of misconceptions about weight loss too. In this article, we will explain weight loss in a scientific and practical way. You will be able to decide what you need to do to accomplish your weight loss aims and you will be able to do it!Okay, lets begin….

Why do you gain weight?

Kilogram is a unit of weight. What do we mean by this? By this we mean that, wherever you go and tell someone that you want 5Kg of something, he will know much you are asking for. Kilogram is a standard that everyone accepts. Everyone knows that when you say “kilogram” there is pre-decided value you are asking for. That is what we mean by a unit. A unit is an accepted or decided value of something.So, when we say that a calorie is a unit of energy, we mean that a particular amount of energy is called a calorie. So, if you eat a sandwich and some amount to energy is obtained from the sandwich, we can say that the sandwich is worth 50 calories or the sandwich is worth 20 calories depending on how much energy is obtained from the sandwich.Why is all this important? All this is important because “counting the calories you consume” is big part of the loosing weight process. You see, as we said earlier, everyday you need a certain amount of energy i.e. everyday you need a certain amount of calories. Now, you generally get these calories from the food you eat. But, if you require 2,500 calories per day and you eat food worth 3000 calories, then you have 500 excess calories per day.
As we said, the body saves all this excess energy in the form of fat. This, is basically why you gain weight! You eat more than your body needs! So if you have to eat just the right amount, you need to know…

The body is a very very “efficient” machine. It is very sophisticated and evolved. One of the main things your body is made for is “survival”. You know, that you need energy to live and do the things that you do. This energy comes from food. The food you eat is converted into energy. When you “feel hungry”, that is the body telling you that you need to take in some food because the body needs some energy. As you probably know, energy is NOT ONLY required for actually doing things. You need energy to walk, talk, push, pull etc. But, besides that, the body still needs energy even if you are doing nothing! Even if you are just lying down on your bed, the body still needs energy. Why? The body needs this energy to keep the heart pumping, keep all the different organs functioning etc. All these internal processes take up some energy. So whether you do something or do nothing you still need a certain amount of energy each day to stay alive. Now, as we said earlier, the body is very sophisticated and made for survival! It prepares for a “rainy day” or a situation where you will have nothing to eat. The average adult can survive for a few weeks without any food before he/she has any serious medical problems. This is possible because the body saves any excess energy that is taken in!Here is the part we are interested in: The excess energy that you take in, is stored in the body in the form of “fat”!To understand all this properly, you need to understand the concept of “calories”..

What are calories? - Why are they so important?

Calories are NOT fat! Calories are energy! Or more correctly speaking, calories are a unit of energy. Just incase you are not sure what a “unit of energy means”, let us try to understand the concept of a “unit”.

How much energy does your body need?

Depending on your age, weight, the activities you do, etc. you will need a certain amount of calories. If you go for a run every morning, you will require more energy and more calories per day. If you are an athlete you will require more calories per day. If you sit, and work on a computer all day, you will require fewer calories per day. How many calories do you require, can be roughly calculated by using a calculator like this one. So, now what? Now that you know how many calories per day you need, then what? Now you got to figure out, how many calories per day you consume. How do you do this? As your day progresses, make a note of everything that you eat. Each and everything, no matter how small it is. Then, after that, use this calculator. Put in all the things that you ate into the calculator. For each thing you put, you will get a “Calorie” value. Note that value. (You will also get a “Fats” value. Forget about that!) After you have noted all the values, add them all up. This will be your total calorie intake for that day.

Origin Of GOD and Vacuum



If God created us, who created God? This is the question often raised by atheists. Most theists will answer this question by saying that God has no cause (discussion). Similarly, if you ask a physicist: what is the origin of the physical laws? He may answer that the physical laws have no cause.
We know our universe has something, but something cannot arise from nothing. We must assume certain things that are self existent (the aseity). In theology, God is the aseity while in science physical laws are the aseity. Since we are trying to understand the Kingdom of God from a scientific point of view, we shall accept physical laws as the aseity.
The "Physical God"
Most people will agree that "God" can be defined as the creator of the three-dimensional world that we live in. According to the string theory, our three dimensional world is a braneworld embedded in a higher dimensional space (possibly 10 dimensions). As shown in previous articles, our braneworld could be created by the highly intelligent life living in the bulk space (the space outside of any branes). The highly intelligent life in the bulk space is the "God" we are referring to.
By this definition, God should also be made up of matter. The elementary particles that constitute His matter are entirely different from us (see What is the Kingdom of God Made of?). However, they should still be governed by the physical laws that apply to all kinds of particles. These general physical laws include the conservation of energy, the second law of thermodynamics, the Heisenberg's Uncertainty Principle, and the Einstein's equation that relates energy to the mass of a particle: E = mc2.
We do not know the initial condition of the bulk universe. The most natural assumption is that it started with an empty space. That is, before any matter was created, the bulk universe contained only vacuum. As shown below, physical laws allow highly intelligent life (God) to evolve from the vacuum.
How could matter be created from vacuum?
According to Einstein's equation, the particles that constitute matter contain energy. On the other hand, the energy conservation law states that the total energy of a closed system must be a constant. It is impossible to create or reduce the total energy. Then, how could matter be created from vacuum? Would it violate the energy conservation law?
The key point that matter can be created from vacuum is that the gravitational potential energy is negative, which may cancel the positive mass energy of the matter. This possibility even surprised Albert Einstein, as told by George Gamow in his book My World Line. In the 1940s, a colleague of George Gamow had an idea that a star could be created out of nothing if its negative gravitational energy precisely cancels out its positive mass energy. One day, Gamow mentioned this idea to Einstein while they were walking in Princeton. Einstein immediately stopped in his tracks and fell into deep thought. Since they were crossing a street, several cars had to stop to avoid running them down.
In reality, a star is unlikely to be created out of nothing because its gravitational energy is too small to cancel out its huge mass energy. However, there is a mechanism that can facilitate the creation of small particles from vacuum: quantum fluctuation.
Quantum fluctuation
According to Heisenberg's Uncertainty Principle, we cannot determine energy and time precisely. Therefore, it is possible for a group of particles with non-zero total energy to appear naturally and then disappear within a short time. The more the total energy is created, the shorter the lifetime. This process is known as the quantum fluctuation. Because of quantum fluctuation, the vacuum cannot be absolutely nothing. It should still have some energy (the vacuum energy).
In the past several decades, quantum fluctuation has been widely used by cosmologists to explain the origin of the Big Bang that started our braneworld. However, the Big Bang involves the creation of a huge amount of energy that is unlikely to arise from quantum fluctuation. A more likely scenario is that the Big Bang was created by God in the bulk space and the Kingdom of God was created by quantum fluctuation.
Although the lifetime of the particles created by quantum fluctuation is short, they may decay into other types of particles or interact with each other to form stable particles during their lifetime. As time proceeded, some structures equivalent to our atoms could be formed. Eventually, a habitable environment and life could be developed. Since the bulk universe is eternal, there was plenty of time for an intelligent life to evolve from tiny particles.
Restriction in our braneworldNearly all elementary particles that constitute ordinary matter in our braneworld contain electric charges. These matter particles are restricted by the charge conservation law. Thus, the creation of a particle usually requires the creation of its antiparticle (with identical mass, but opposite charge). However, a particle can annihilate its antiparticle, making self-creation of matter particles by quantum fluctuation virtually impossible in our braneworld. In the labs, physicists can only observe the self-creation of the lightest particles, the electron-positron pair (positron is the antiparticle of the electron), which exists only for a very short time.
The elementary particles in the Kingdom of God are entirely different from ordinary particles in our braneworld. Most of them may not have electric charges. Without the charge-conservation restriction, the self-creation of particles may be quite common in the bulk space.

Sunday, September 14, 2008

History of Tattoo


The word Tattoo has been derived from the Polynesian word 'tatao', which means tapping or marking something. This term was first coined by Captain James Cook in the year 1769, when he met the Tahitians during his voyage, who had decorated their bodies with tattoos. At that time, tattooing was a very painful procedure. The technique of tattooing has now undergone a major modification. Read on to know more about the origin & history of tattoo.
Initially this body art involved piercing into the body, which was done by dropping a sharp-pointed comb into lampblack and then inserting it into the skin. Despite the trouble involved, many people got their bodies tattooed, especially arms. The tradition of tattooing, which was originally practiced in Tahiti and other Polynesian islands spread its influence in Europe too. In those days, it was mainly worn by the sailors, drunkards and criminals.The archeological excavations have revealed that this tradition of tattooing has been an integral part of many ancient cultures. In the year 1992, in the Alp region that lies between the border of Austria and Italy, a properly preserved body of a man was found. According to the estimations of the archeological department, it is expected that this man died near about 5000 years ago. He had 58 tattoos all over his body. Most of the ancient Egyptian mummies had tattoos. The Greeks and Romans of the bygone times used tattoo for identifying the slaves and criminals.

nanomaterials


Nanomaterials are materials with morphological features smaller than a one tenth of a micrometre in at least one dimension. Despite the fact that there is no consensus upon the minimum or maximum size of nanomaterials, some authors restricting their size from 1 to ~30 nm, a logical definition would situate the nanoscale between microscale (0.1 micrometre) and atomic/molecular scale (about 0.2 nanometers).

Fundamental concepts

A unique aspect of nanotechnology is the vastly increased ratio of surface area to volume present in many nanoscale materials which opens new quantum mechanical effects, for example the “quantum size effect” where the electronic properties of solids are altered with great reductions in particle size. This effect does not come into play by going from macro to micro dimensions. However, it becomes dominant when the nanometer size range is reached. Additionally, a number of physical properties change when compared to macroscopic systems. Novel mechanical properties of nanomaterials is the subject of nanomechanics research. Their catalytic activity reveals novel properties in the interaction with biomaterials.
Nanotechnology can be thought of as extensions of traditional disciplines towards the explicit consideration of these properties. Additionally, traditional disciplines can be re-interpreted as specific applications of nanotechnology. This dynamic reciprocation of ideas and concepts contributes to the modern understanding of the field. Broadly speaking, nanotechnology is the synthesis and application of ideas from science and engineering towards the understanding and production of novel materials and devices. These products generally make copious use of physical properties associated with small scales.
Materials reduced to the nanoscale can suddenly show very different properties compared to what they exhibit on a macroscale, enabling unique applications. For instance, opaque substances become transparent (copper); inert materials become catalysts (platinum); stable materials turn combustible (aluminum); solids turn into liquids at room temperature (gold); insulators become conductors (silicon). Materials such as gold, which is chemically inert at normal scales, can serve as a potent chemical catalyst at nanoscales. Much of the fascination with nanotechnology stems from these unique quantum and surface phenomena that matter exhibits at the nanoscale.
Nanosize powder particles (a few nanometres in diameter, also called nanoparticles) are potentially important in ceramics, powder metallurgy, the achievement of uniform nanoporosity and similar applications. The strong tendency of small particles to form clumps ("agglomerates") is a serious technological problem that impedes such applications. However, a few dispersants such as ammonium citrate (aqueous) and imidazoline or oleyl alcohol (nonaqueous) are promising additives for deagglomeration.

Size concerns

Another concern is that the volume of an object decreases as the third power of its linear dimensions, but the surface area only decreases as its second power. This somewhat subtle and unavoidable principle has huge ramifications. For example the power of a drill (or any other machine) is proportional to the volume, while the friction of the drill's bearings and gears is proportional to their surface area. For a normal-sized drill, the power of the device is enough to handily overcome any friction. However, scaling its length down by a factor of 1000, for example, decreases its power by 10003 (a factor of a billion) while reducing the friction by only 10002 (a factor of "only" a million). Proportionally it has 1000 times less power per unit friction than the original drill. If the original friction-to-power ratio was, say, 1%, that implies the smaller drill will have 10 times as much friction as power. The drill is useless.
This is why, while super-miniature electronic integrated circuits can be made to function, the same technology cannot be used to make functional mechanical devices in miniature: the friction overtakes the available power at such small scales. So while you may see microphotographs of delicately etched silicon gears, such devices are curiosities with limited real world applications, for example in moving mirrors and shutters. Surface tension increases in the same way, causing very small objects to tend to stick together. This could possibly make any kind of "micro factory" impractical: even if robotic arms and hands could be scaled down, anything they pick up will tend to be impossible to put down. The above being said, molecular evolution has resulted in working cilia, flagella, muscle fibers, and rotary motors in aqueous environments, all on the nanoscale. These machines, however, exploit the increase of the frictional forces found at the micro or nanoscale. Unlike an oar, paddle or propeller the mechanics of which are dominated by normal frictional forces (the frictional forces perpendicular to the surface) for propulsion, cilia, etc., develop motion resulting from the exaggerated drag or laminar forces (frictional forces parallel to the surface) present at micro and nano dimensions. To develop meaningful "machines" at the nanoscale, the relevant forces need to be considered. We are faced with the development and design of relevant machines rather than the simple reproductions of macroscopic ones.
All these scaling issues have to be kept in mind while evaluating any kind of nanotechnology

Materials used in nanotechnology

Materials referred to as "nanomaterials" generally fall into two categories: fullerenes, and inorganic nanoparticles. See also Nanomaterials in List of nanotechnology topics

Fullerenes

The fullerenes are a class of allotropes of carbon which conceptually are graphene sheets rolled into tubes or spheres. These include the carbon nanotubes which are of interest due to both their mechanical strength and their electrical properties.
For the past decade, the chemical and physical properties of fullerenes have been a hot topic in the field of research and development, and are likely to continue to be for a long time. In April 2003, fullerenes were under study for potential medicinal use: binding specific antibiotics to the structure to target resistant bacteria and even target certain cancer cells such as melanoma. The October 2005 issue of Chemistry and Biology contains an article describing the use of fullerenes as light-activated antimicrobial agents. In the field of nanotechnology, heat resistance and superconductivity are some of the more heavily studied properties.
A common method used to produce fullerenes is to send a large current between two nearby graphite electrodes in an inert atmosphere. The resulting carbon plasma arc between the electrodes cools into sooty residue from which many fullerenes can be isolated.
There are many calculations that have been done using ab-initio Quantum Methods applied to fullerenes. By DFT and TDDFT methods one can obtain IR, Raman and UV spectra. Results of such calculations can be compared with experimental results.

Nanoparticles

Nanoparticles or nanocrystals made of metals, semiconductors, or oxides are of interest for their mechanical, electrical, magnetic, optical, chemical and other properties. Nanoparticles have been used as quantum dots and as chemical catalysts.
Nanoparticles are of great scientific interest as they are effectively a bridge between bulk materials and atomic or molecular structures. A bulk material should have constant physical properties regardless of its size, but at the nano-scale this is often not the case. Size-dependent properties are observed such as quantum confinement in semiconductor particles, surface plasmon resonance in some metal particles and superparamagnetism in magnetic materials.
Nanoparticles exhibit a number of special properties relative to bulk material. For example, the bending of bulk copper (wire, ribbon, etc.) occurs with movement of copper atoms/clusters at about the 50 nm scale. Copper nanoparticles smaller than 50 nm are considered super hard materials that do not exhibit the same malleability and ductility as bulk copper. The change in properties is not always desirable. Ferroelectric materials smaller than 10 nm can switch their magnetisation direction using room temperature thermal energy, thus making them useless for memory storage. Suspensions of nanoparticles are possible because the interaction of the particle surface with the solvent is strong enough to overcome differences in density, which usually result in a material either sinking or floating in a liquid. Nanoparticles often have unexpected visible properties because they are small enough to confine their electrons and produce quantum effects. For example gold nanoparticles appear deep red to black in solution.
Nanoparticles have a very high surface area to volume ratio. This provides a tremendous driving force for diffusion, especially at elevated temperatures. Sintering can take place at lower temperatures, over shorter time scales than for larger particles. This theoretically does not affect the density of the final product, though flow difficulties and the tendency of nanoparticles to agglomerate complicates matters. The surface effects of nanoparticles also reduces the incipient melting temperature.

Safety of Manufactured Nanomaterials

Nanomaterials behave differently than other similarly-sized particles. It is therefore necessary to develop specialized approaches to testing and monitoring their effects on human health and on the environment. The OECD Chemicals Committee has established the Working Party on Manufactured Nanomaterials to address this issue and to study the practices of OECD member countries in regards to nanomaterial safety

While nanomaterials and nanotechnologies are expected to yield numerous health and health care advances, such as more targeted methods of delivering drugs, new cancer therapies, and methods of early detection of diseases, they also may have unwanted effects.

Increased rate of absorption is the main concern associated with manufactured nanoparticles.
When materials are made into nanoparticles, their surface area to volume ratio increases. The greater specific surface area (surface area per unit weight) may lead to increased rate of absorption through the skin, lungs, or digestive tract and may cause unwanted effects to the lungs as well as other organs. However, the particles must be absorbed in sufficient quantities in order to pose health risks

NIKOLA TESLA'S WIRELESS TRANSMISSION


We are now only days away from our manuscript-delivery-deadline for the Damn Interesting book. Once that's behind us, we can return to our regularly scheduled writing. In the meantime, here's a re-run from 10 July 2007.
Wardenclyffe TowerIn 1905, a team of construction workers in the small village of Shoreham, New York labored to erect a truly extraordinary structure. Over a period of several years the men had managed to assemble the framework and wiring for the 187-foot-tall Wardenclyffe Tower, in spite of severe budget shortfalls and a few engineering snags. The project was overseen by its designer, the eccentric-yet-ingenious inventor Nikola Tesla (10 July 1856 - 7 January 1943). Atop his tower was perched a fifty-five ton dome of conductive metals, and beneath it stretched an iron root system that penetrated more than 300 feet into the Earth's crust. "In this system that I have invented, it is necessary for the machine to get a grip of the earth," he explained, "otherwise it cannot shake the earth. It has to have a grip… so that the whole of this globe can quiver."
Though it was far from completion, it was rumored to have been tested on several occasions, with spectacular, crowd-pleasing results. The ultimate purpose of this unique structure was to change the world forever.
Tesla's inventions had already changed the world on several occasions, most notably when he developed modern alternating current technology. He had also won fame for his victory over Thomas Edison in the well-publicized "battle of currents," where he proved that his alternating current was far more practical and safe than Edison-brand direct current. Soon his technology dominated the world's developing electrical infrastructure, and by 1900 he was widely regarded as America's greatest electrical engineer. This reputation was reinforced by his other major innovations, including the Tesla coil, the radio transmitter, and fluorescent lamps.
In 1891, Nikola Tesla gave a lecture for the members of the American Institute of Electrical Engineers in New York City, where he made a striking demonstration. In each hand he held a gas discharge tube, an early version of the modern fluorescent bulb. The tubes were not connected to any wires, but nonetheless they glowed brightly during his demonstration. Tesla explained to the awestruck attendees that the electricity was being transmitted through the air by the pair of metal sheets which sandwiched the stage. He went on to speculate how one might increase the scale of this effect to transmit wireless power and information over a broad area, perhaps even the entire Earth. As was often the case, Tesla's audience was engrossed but bewildered.
Back at his makeshift laboratory at Pike's Peak in Colorado Springs, the eccentric scientist continued to wring the secrets out of electromagnetism to further explore this possibility. He rigged his equipment with the intent to produce the first lightning-scale electrical discharges ever accomplished by mankind, a feat which would allow him to test many of his theories about the conductivity of the Earth and the sky. For this purpose he erected a 142-foot mast on his laboratory roof, with a copper sphere on the tip. The tower's substantial wiring was then routed through an exceptionally large high-voltage Tesla coil in the laboratory below. On the night of his experiment, following a one-second test charge which momentarily set the night alight with an eerie blue hum, Tesla ordered his assistant to fully electrify the tower.
Though his notes do not specifically say so, one can only surmise that Tesla stood at Pike's Peak and cackled diabolically as the night sky over Colorado was cracked by the man-made lightning machine. Colossal bolts of electricity arced hundreds of feet from the tower's top to lick the landscape. A curious blue corona soon enveloped the crackling equipment. Millions of volts charged the atmosphere for several moments, but the awesome display ended abruptly when the power suddenly failed. All of the windows throughout Colorado Springs went dark as the local power station's industrial-sized generator collapsed under the strain. But amidst such dramatic discharges, Tesla confirmed that the Earth itself could be used as an electrical conductor, and verified some of his suspicions regarding the conductivity of the ionosphere. In later tests, he recorded success in an attempt to illuminate light bulbs from afar, though the exact conditions of these experiments have been lost to obscurity. In any case, Tesla became convinced that his dream of world-wide wireless electricity was feasible.
In 1900, famed financier J.P. Morgan learned of Tesla's convictions after reading an article in Century Magazine, wherein the scientist described a global network of high-voltage towers which could one day control the weather, relay text and images wirelessly, and provide ubiquitous electricity via the atmosphere. Morgan, hoping to capitalize on the future of wireless telegraphy, immediately invested $150,000 to relocate Tesla's lab to Long Island to construct a pilot plant for this "World Wireless System." Construction of Wardenclyffe Tower and its dedicated power generating facility began the following year.
Tesla's lab at pike's peakIn December 1901, a scant few months after construction began, a competing scientist named Guglielmo Marconi executed the world's first trans-Atlantic wireless telegraph signal. Tesla's investors were deeply troubled by the development despite the fact that Marconi borrowed from seventeen Tesla patents to accomplish his feat. Though Marconi's plans were considerably less ambitious in scale, his apparatus was also considerably less expensive. Work at Wardenclyffe continued, but Tesla realized that this his competitor's success with simple wireless telegraphy had greatly diminished the likelihood of further investments in his own, much grander project.
In 1908, Tesla described his sensational aspirations in an article for Wireless Telegraphy and Telephony magazine:
"As soon as completed, it will be possible for a business man in New York to dictate instructions, and have them instantly appear in type at his office in London or elsewhere. He will be able to call up, from his desk, and talk to any telephone subscriber on the globe, without any change whatever in the existing equipment. An inexpensive instrument, not bigger than a watch, will enable its bearer to hear anywhere, on sea or land, music or song, the speech of a political leader, the address of an eminent man of science, or the sermon of an eloquent clergyman, delivered in some other place, however distant. In the same manner any picture, character, drawing, or print can be transferred from one to another place. Millions of such instruments can be operated from but one plant of this kind. More important than all of this, however, will be the transmission of power, without wires, which will be shown on a scale large enough to carry conviction."
In essence, Tesla's global power grid was designed to "pump" the planet with electricity which would intermingle with the natural telluric currents that move throughout the Earth's crust and oceans. At the same time, towers like the one at Wardenclyffe would fling columns of raw energy skyward into the electricity-friendly ionosphere fifty miles up. To tap into this energy conduit, customers' homes would be equipped with a buried ground connection and a relatively small spherical antenna on the roof, thereby creating a low-resistance path to close the giant Earth-ionosphere circuit. Oceangoing ships could use a similar antenna to draw power from the network while at sea. In addition to electricity, these currents could carry information over great distances by bundling radio-frequency energy along with the power, much like the modern technology to send high-speed Internet data over power lines.
Nikola TeslaGiven his supporting experimental data and previous engineering accomplishments, there was little reason to doubt the veracity of Tesla's claims. But building the power station, the huge wooden tower, and the fifty-five ton conductive dome depleted the original investment money relatively quickly, leading to chronic funding shortages. The complications were further compounded by a stock market crash in 1901 which doubled the cost of building materials and sent investors scurrying for financial cover.
The Wardenclyffe team tested their tower a handful of times during construction, and the results were very encouraging; but the project soon devoured Tesla's personal savings, and it became increasingly clear that no new investments were forthcoming. In 1905, having exhausted all practical financial options, the construction efforts were abandoned. Regarding the project's demise, Tesla stated:
"It is not a dream, it is a simple feat of scientific electrical engineering, only expensive — blind, faint-hearted, doubting world! […] Humanity is not yet sufficiently advanced to be willingly led by the discoverer's keen searching sense. But who knows? Perhaps it is better in this present world of ours that a revolutionary idea or invention instead of being helped and patted, be hampered and ill-treated in its adolescence — by want of means, by selfish interest, pedantry, stupidity and ignorance; that it be attacked and stifled; that it pass through bitter trials and tribulations, through the strife of commercial existence. So do we get our light. So all that was great in the past was ridiculed, condemned, combatted, suppressed — only to emerge all the more powerfully, all the more triumphantly from the struggle."
If Tesla's plans had come to fruition, the pilot plant would have been merely the first of many. Such "magnifying transmitter" towers would have peppered the globe, saturating the planet with free electricity and wireless communication as early as the 1920s. Instead, the futuristic facility's potential went untapped for over a decade, until the tower was finally demolished for salvage in 1917.
The fall of Wardenclyffe thrust the brilliant inventor into a deep depression and financial distress, and in the years that followed his colleagues began to seriously doubt his mental well-being. His eccentricities became increasingly exaggerated, underscored by his tendency to bring home and care for the injured pigeons he encountered during his daily visits to the park. He also developed an unnatural fear of germs, washing his hands compulsively and refusing to eat any food which had not been disinfected through boiling. But his mind remained pregnant with groundbreaking ideas, as he demonstrated when he described radar technology in 1917, almost twenty years before it became a reality. Tesla in front of the spiral coil of his high-frequency transformer.In 1928, aged seventy-two years, he filed one of his last patents; it described an ingenious lightweight flying machine that was an early precursor to today's tilt-rotor Vertical Short Takeoff and Landing (VSTOL) planes such as the V-22 Osprey.
Nikola Tesla shuffled off this mortal coil in 1943, suffering a heart attack alone in his hotel room. Though he kept copious diaries of his experiments and ideas throughout his life, they were notoriously vague and lacking in technical details. He preferred to rely on his photographic memory for such nuances, therefore much of his knowledge went with him to the grave. Some modern investigations and calculations, however, do support Tesla's contention that wireless electricity is not only feasible, but it may have even been a superior alternative to the extensive and costly grid of power lines which crisscross our globe today.
Had Wardenclyffe been completed without interruption, Tesla may have once again managed to alter the course of history. Instant access to power, information, pirated phonograph cylinders, and lewd photos of bare-ankled floozies on the TeslaNet may have ushered in the Information Age almost a century ahead of schedule, making today's world a very different place indeed. Perhaps one day we will enjoy the future that Tesla envisioned, albeit a bit behind schedule.
Happy 151st birthday, Nikola.

Are the mobile phone Towers SAFE..???


Huge, bulky telecommunication towers on top of tall buildings is not an uncommon site in the major cities these days. But there is a possibility that these towers may not be safe for humans living near it in ways more than one..

THERE IS a widespread apprehension among people that some mobile operators have constructed the towers on top of structurally weak buildings in the city and any physical damage caused to the buildings by these towers may put the lives of the people living in and around such installations at grave risk.
There is also a serious concern that since we are living in Seismic Zone-V, these towers could cause devastating damage, in case an earthquake, if not designed properly. Therefore, it is necessary to monitor and appropriately regulate the erection of mobile phone towers on top of buildings.
Structural safety of the buildings has to be accorded top priority before giving permission for the construction of mobile towers. The agencies empowered to give building permissions should not allow erection of mobile towers on buildings, which have been constructed without valid permission. These measures will also put an end to the alleged unregulated erection of hoardings and other outdoor displays on top of the buildings in the city.
Mobile phone towers should also be subject to the enforcement of building laws along with the unauthorised buildings. A structural engineer should inspect and sign the site plan and drawings of the mobile phone towers, certifying that necessary safety measures have been taken and that the structure is safe and earthquake resistant.
There are, so far, no restrictions on the locations of towers. A city like Srinagar requires numerous towers, as telephone operators need large number of towers for better coverage and transmission. At the same time, number of towers needs to be kept at minimum in the interest of proper urban planning, public health and safety.
Base stations are usually tall structures servicing large areas (cells). In recent times, there has been a trend towards smaller antennas servicing smaller cells. The aerials are normally erected on tall buildings to cover the widest area possible. Operators need to replace old model towers with single pole towers. There are four telecom operators in the city: BSNL, Airtel, Aircel and Reliance. Three or more firms should share each tower, and no individual firm should be allowed to set up a separate tower for itself.
It is difficult to confine the construction of mobile towers to non-residential areas, as the distance between two towers is determined by factors such as transmission frequency, density of consumers and the desired sound quality, among others. However, telecommunication towers atop buildings in residential areas may need to be relocated, where they are considered to be a hazard. There are fears that the people living in and around such installations are susceptible to health hazards.
Electromagnetic radiations emitted from the towers are debated all over the world. However, there is no conclusive study stating that radiation emitted by mobile phones affects health adversely. Medical research material is available on health-related effects of electromagnetic radiation emitted from antennae on telecommunication towers, yet no conclusive evidence of hazards to human health has been established for possible exposure levels from the cellular towers.
Modified currents and voltage generate oscillation of the electrical and magnetic field, which propagates in space. The electric and magnetic components oscillate at right angels to each other, these waves are termed as Electro Magnetic Radiations (EMRs). Mobile phone towers emit electro magnetic rays with a frequency of 1900 MHz. With this high frequency, they can easily pass through our bodies and concrete walls. Our immune system can be harmfully affected when these EMR rays pass through our body. Mobile phone towers’ radioactivity can thus affect every living thing in one square kilometer range.
Density ranges of this radioactivity are 17,100 - 72,000 micro watt per square metre. Mobile towers, installed on top of buildings can penetrate radio activity among those who live in the same buildings. Electromagnetic field of these towers attract Radon gas from atmosphere. EMR can cause memory loss, headache, allergy and skin diseases mostly affecting those who live nearby. Sperm-count in men is known to reduce with daily use of cell phone.
The mobile phone operators however, argue that Radio Frequency (RF) emissions from antennas used for wireless transmissions such as cellular and Personal Communication Systems (PCS) signals are within safe limits. Therefore, there is no reason to believe that such towers could constitute a potential health hazard to nearby residents. They claim that the roof of the building absorbs large amounts of the RF energy.
Cell phones communicate with nearby base stations even when these are not being used for a call. This is necessary to tell the system where the user is, in case a call should come in. Thus, even while they are inactive, the phones are a source of RF energy exposure to the user. Hands-free kits reduce exposure to a user by removing the phone from the vicinity of the head. There is no identifiable health benefit in using the kits, but there is no detriment either and using them may increase a user’s peace of mind.
There is not much that you can do if there is already a phone tower on the roof of your own or a nearby building, except getting the building assessed by a structural engineer, for its safety and in case it is found that the building is not capable of taking the load and stresses of the telecommunication towers, these should be relocated immediately, to safe guard the lives of people. Before the installation of a mobile tower aerial on your roof top, make sure that the required safety measures have been taken.
Ensure that the building has had a proper structural survey done by a qualified structural engineer, to see if it is capable of taking the weight of the aerial. The calculations should include effect of earthquake and wind resistance on the aerial to make sure that it will be able to stand up to severe winds.
There remains a lack of consensus among the experts about whether and at what levels electric magnetic fields and electromagnetic radiation can affect humans. The reality is also that there is a high level of concern regarding possible effects. The best approach to adopt, therefore, is a precautionary one. Should health be put at potential risk by waiting for proof of harm beyond all reasonable doubts before preventative action is taken; or should the action be taken as a precaution before any conclusive evidence is found to prevent any potential harm?
It is possible that EMFs and EMR at the current levels are harmless, but it may not be the case.
The question is whether we wait for overwhelmingly convincing proof, by which time many people may have been harmed or whether we take precautionary preventative steps now. At the rate that demand for mobile phones is increasing, there will soon be more mobile phone towers standing than trees.
Without waiting for a single day, the municipal authorities need to immediately assess the safety of all buildings where mobile towers have been erected and ensure that in future no permission is given unless the building is certified to be structurally safe and is capable of taking the load of the tower and bear all effects of earthquake and severe winds. On our part, we should prefer landline phones over cell phones and wherever we use cell phones, we should use a proper head-set.

photoelectric cell


An electronic device having an electrical output that varies in response to incident radiation, especially to visible light. Also called electric eye.

A device incorporated in an electric circuit; in response to light that falls on the cell, the electrical output or the resistance varies; used in measuring devices and in control devices that depend on illumination level or the interruption of a light beam.

photoelectric cell
or photocell, device whose electrical characteristics (e.g., current, voltage, or resistance) vary when light is incident upon it. The most common type consists of two electrodes separated by a light-sensitive semiconductor material. A battery or other voltage source connected to the electrodes sets up a current even in the absence of light; when light strikes the semiconductor section of the photocell, the current in the circuit increases by an amount proportional to the intensity of the light. In the phototube, an older type of photocell, two electrodes are enclosed in a glass tube—an anode and a light-sensitive cathode, i.e., a metal that emits electrons in accordance with the photoelectric effect. Although the phototube itself is now obsolete, the principle survives in the photomultiplier tube, which can be used to detect and amplify faint amounts of light. In this tube, electrons ejected from a photosensitive cathode by light are attracted toward and strike a positive electrode, liberating showers of secondary electrons; these are drawn to a more positive electrode, producing yet more secondary electrons—and so on, through several stages, until a large pulse of current is produced. Besides its use in measuring light intensity, a photomultiplier can be built into a television camera tube, making it sensitive enough to pick up the visual image of a star too faint to be seen by the human eye. The photovoltaic type of photoelectric cell, when exposed to light, can generate and support an electric current without being attached to any external voltage source. Such a cell usually consists of a semiconductor crystal with two zones composed of dissimilar materials. When light shines on the crystal, a voltage is set up across the junction between the two zones. A phototransistor, which is a type of photovoltaic cell, can generate a small current that acts like the input current in a conventional transistor and controls a larger current in the output circuit. Photovoltaic cells are also used to make solar batteries (see solar cell). Since the current from a photocell can easily be used to operate switches or relays, it is often used in light-actuated counters, automatic door openers, and intrusion alarms. Photocells in such devices are popularly known as electric eyes.


other languages:

Dansk (Danish)n. - fotocelle
Nederlands (Dutch)foto-elektrische cel
Français (French) n. - cellule photo-électrique
Deutsch (German) n. - Photozelle
Ελληνική (Greek) n. - (τεχνολ.) φωτοηλεκτρικό κύτταρο
Italiano (Italian) cellula fotoelettrica
Português (Portuguese) n. - fotocélula (f)
Русский (Russian) фотоэлемент, электронный "глаз"
Español (Spanish) n. - célula fotoeléctrica
Svenska (Swedish) n. - fotocell
中文(简体) (Chinese (Simplified)) 光电池
中文(繁體) (Chinese (Traditional)) n. - 光電池
한국어 (Korean) n. - 광전지
日本語 (Japanese) n. - 光電セル, 光電池
العربيه (Arabic) ‏(الاسم) خليه ضوئيه أو كهروضوئيه‏
עברית (Hebrew) n. - ‮תא פוטואלקטרי, תא חשמל-אורי‬

How to increase your adsense revenue


In this lesson you will learn to boost your Adsense revenue. You must have heard about peoples achieving high payments per click with AdSense. For high total earnings, your website requires a lot of page views and a high click-through rate. So to boost your Adsense revenue you need high traffic on your web site along with high click-through rates. By using this tutorial you will learn how to increase web traffic and click-through rates. In short you can increase your Adsense income by increasing Impressions, Click-through and Effective CPM. Improving your web statistics in any, or preferably, all of these three key areas will increase your Adsense revenue.
Increasing Impressions (Increasing web traffic)

Basically the impressions are the number of times your web pages with Adsense ads have been viewed. So it is directly proportional to the number or visitors to your web site. So, you can increase Impressions by increasing traffic to your web site.

In short here are some of the best ways to increase targeted traffic to your web pages:
More web pages means more traffic. So, create more web pages, with relevant, laser focused content.
Increase the link popularity for your web site
List your website/s under relevant categories in more directories
Set up a directory of relevant sites on your website and accept relevant reciprocal links
Write articles relevant to your web site and submit in the article directories
Increasing Adsense click-throughEven if your web site is receiving a lot of traffic, you will be earn only if your visitors clicks on the Adsense Ads and visits the advertiser web site. Clickthroughs are nothing but it is percentage of viewers who click on your Adsense ads. You can increase click-through by increasing the relevance of Adsense ads on your site, and by tweaking the format and placement of your ads. You can try different placements and colors of the ads, but be careful that the ads mixes with the content of your web site style.Try to make the different pages with different kinds of content. And make sure that these content pages are very clearly focused. Then Google will be able to serve highly relevant AdWords to your visitors. And in this way your visitors will be more interested in the ads, which results in higher click through rates -- and more money for you! Increasing Adsense CPMYou can also increase your Adsense income by increasing Adsense CPM. The effective CPM is a measure of your average earnings, per thousand clicks. The CPM can be increased by selecting topics (keywords) that attract high bids from Adsense advertisers in your web pages. You can use overture bid tool http://uv.bidtool.overture.com/d/USm/search/tools/bidtool/ to find the bid amount for your key words. On the internet there are a number of keyword research tools available, both free and paid, that you can use to find the high paid key words.In short here is steps that you should follow to Increase your total Adsense revenue:
Develop your web site using high paying key words
Design layout of your web site and put the ads focusing on the maximum click-through
Promote your web site in search engines and get more traffic on your web site
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I also recomend you to use adbrite, you can make some bucks in here....!!!

The Life and Death of Stars


Where are Stars Born?

Astronomers believe that molecular clouds, dense clouds of gas located primarily in the spiral arms of galaxies are the birthplace of stars. Dense regions in the clouds collapse and form "protostars". Initially, the gravitational energy of the collapsing star is the source of its energy. Once the star contracts enough that its central core can burn hydrogen to helium, it becomes a "main sequence" star.


Main Sequence Stars

Main sequence stars are stars, like our Sun, that fuse hydrogen atoms together to make helium atoms in their cores. For a given chemical composition and stellar age, a stars' luminosity, the total energy radiated by the star per unit time, depends only on its mass. Stars that are ten times more massive than the Sun are over a thousand times more luminous than the Sun. However, we should not be too embarrassed by the Sun's low luminosity: it is ten times brighter than a star half its mass. The more massive a main sequence star, the brighter and bluer it is. For example, Sirius, the dog star, located to the lower left of the constellation Orion, is more massive than the Sun, and is noticeably bluer. On the other hand, Proxima Centauri, our nearest neighbor, is less massive than the Sun, and is thus redder and less luminous.
Since stars have a limited supply of hydrogen in their cores, they have a limited lifetime as main sequence stars. This lifetime is proportional to f M / L, where f is the fraction of the total mass of the star, M, available for nuclear burning in the core and L is the average luminosity of the star during its main sequence lifetime. Because of the strong dependence of luminosity on mass, stellar lifetimes depend sensitively on mass. Thus, it is fortunate that our Sun is not more massive than it is since high mass stars rapidly exhaust their core hydrogen supply. Once a star exhausts its core hydrogen supply, the star becomes redder, larger, and more luminous: it becomes a red giant star. This relationship between mass and lifetime enables astronomers to put a lower limit on the age of the universe.


Death of an "Ordinary" Star

After a low mass star like the Sun exhausts the supply of hydrogen in its core, there is no longer any source of heat to support the core against gravity. Hydrogen burning continues in a shell around the core and the star evolves into a red giant. When the Sun becomes a red giant, its atmosphere will envelope the Earth and our planet will be consumed in a fiery death.
Meanwhile, the core of the star collapses under gravity's pull until it reaches a high enough density to start burning helium to carbon. The helium burning phase will last about 100 million years, until the helium is exhausted in the core and the star becomes a red supergiant. At this stage, the Sun will have an outer envelope extending out towards Jupiter. During this brief phase of its existence, which lasts only a few tens of thousands of years, the Sun will lose mass in a powerful wind. Eventually, the Sun will lose all of the mass in its envelope and leave behind a hot core of carbon embedded in a nebula of expelled gas. Radiation from this hot core will ionize the nebula, producing a striking "planetary nebula", much like the nebulae seen around the remnants of other stars. The carbon core will eventually cool and become a white dwarf, the dense dim remnant of a once bright star.


Death of a Massive Star

Massive stars burn brighter and perish more dramatically than most. When a star ten times more massive than Sun exhaust the helium in the core, the nuclear burning cycle continues. The carbon core contracts further and reaches high enough temperature to burn carbon to oxygen, neon, silicon, sulfur and finally to iron. Iron is the most stable form of nuclear matter and there is no energy to be gained by burning it to any heavier element. Without any source of heat to balance the gravity, the iron core collapses until it reaches nuclear densities. This high density core resists further collapse causing the infalling matter to "bounce" off the core. This sudden core bounce (which includes the release of energetic neutrinos from the core) produces a supernova explosion. For one brilliant month, a single star burns brighter than a whole galaxy of a billion stars. Supernova explosions inject carbon, oxygen, silicon and other heavy elements up to iron into interstellar space. They are also the site where most of the elements heavier than iron are produced. This heavy element enriched gas will be incorporated into future generations of stars and planets. Without supernova, the fiery death of massive stars, there would be no carbon, oxygen or other elements that make life possible.

The fate of the hot neutron core depends upon the mass of the progenitor star. If the progenitor mass is around ten times the mass of the Sun, the neutron star core will cool to form a neutron star. Neutron stars are potentially detectable as "pulsars", powerful beacons of radio emission. If the progenitor mass is larger, then the resultant core is so heavy that not even nuclear forces can resist the pull of gravity and the core collapses to form a black hole.
Learn more about the late stages of stellar evolution from the Chandra mission's web pages:
White Dwarfs
Neutron Stars
Black Holes
Supernovae


Do You Know About Chimpanzee Communication


Human speech is commonly recognized as the dividing line between ourselves and the rest of the animal world. The reason why the ability to speak is such a sharply defined boundary goes deeper than the mere existence of a method of communication, it is what we have done with language that counts. Language paved the way for all the special human abilities that we so value- self-awareness, higher emotion and personal memories (McCrone 48). As we search into the origin, variety and composition of human language, it is important to examine our language at its root. As human beings, we share 99% of our genetic make-up with our closest relative, the chimpanzee. Therefore, by studying the communication abilities and development of language in chimps and other great apes, we can learn more about ourselves and our own language capabilities.
To begin to examine the communication of the chimpanzee, one must first gain a general understanding of primate communication in general. For the most part, the great apes are fairly quiet, while monkeys are noisy creatures, chattering and shrieking to one another using different alarm cries to signal different types of danger (McCrone 144). Apes do not depend as much on calls and cries to keep their group acting in harmony. The orangutan lives a fairly solitary life, not requiring such calls, while the slow-paced life of gorillas does not perhaps need cries to coordinate the action of the band. The chimp is the noisiest ape, yet still only uses about a dozen different noises, such as grunts, hoots, screeches and whimpers compared to the hundreds of sounds the human vocal organs can produce.
The simple, instinctive alarm call of monkeys can be seen in sharp contrast to the expressive or emotional cry which is commonly used by the great apes. In this type of communication, an animal is able to vent its inner feelings, not just the need for food or warn about a source of danger. A chimp, for example, might hoot with anger or screech with fear. These responses are genetically programmed like a call, since a chimp does not have to learn to screech or hoot and has quite standard responses to its feelings. The difference is that an emotional cry does not trigger a guaranteed response in the listener who needs a certain intelligence to interpret the reason for the unhappy noises and to react appropriately(McCrone 146). Calls and cries are effective but they are not what we should describe as true forms of communication, where an animal deliberately sends a message to another member of its group rather than just giving voice to an emotion. In true communication, signaling comes under the control of the conscious cortex rather than the subconscious emotional system.
Chimpanzees can indeed communicate in this deliberate fashion (McCrone 146). Chimps employ a rich variety of gestures and facial expressions to keep in touch with each other, and more importantly, there is intelligence behind the exchanges that makes for a level of understanding unseen elsewhere in the animal world. This sort of communication ability is what makes chimps appear far more socially advanced than any other animal. They may have a simple repertoire of noises and body language, but the intelligence with which these signals are used and interpreted makes a big difference.
Only recently has it been realized how well chimpanzees can communicate. Most of the observations have come from a troop of wild chimps at the Gombe Stream Reserve on the shores of Lake Tanganyika and from a captive group in Holland's Arnhem Zoo (McCrone 147). Chimps make use of simple gestures, waving their hand in the direction they want another chimp to look or holding out a begging hand for support then relying on the intelligence of the other animal to sum up the situation and react (McCrone 149). Some chimps even develop their own special signals. These observations indicate that chimps are the most intelligent communicators in the animal world, even compared to other highly social species such as lions, wolves and monkeys. This level of communication comes from chimps' deep understanding of the social world around them, which means that each chimp must be able mentally to model the impact of its own actions on the group as well as being able to guess the intentions of others (McCrone 150).
Highly social animals also need to be able to mentally model the social world of their group, remembering such things as who is dominant, who is bad-tempered, and what actions are likely to follow a particular grunt or screech. Because these sorts of things are less predictable and obvious than the events of the natural world, social animals like chimps and humans need bigger brains to cope with the complexity of their social lives (McCrone 150). A chimpanzee may have a deep understanding of the world and the brain power to model both physical and social relationships, but that knowledge stays locked away in the gray background of the memory banks until roused by events actually happening in the chimp's presence. Either another chimp draws its attention to the event, like the nervous mother nudging mama to tell her about the squabbling kids, or a chimp gives vent to its emotions and the others correctly guess the reason for its display, like the dominant chimp hooting at the young male for getting too friendly with the female (McCrone 156).
Perhaps chimps also invent their own personal noises, maybe using particular grunts to mean certain things. But such personal noises are not as obvious as gestures to human observers. The point is that it is quite possible for chimps- or early man- to make symbolic use of noises, even if these "protowords" have a fixed meaning only for the individuals uttering them. This use of personal noises would at least be the first step toward language. The next would be for the symbolic noise to be picked up and used by all the members of a troop. Learned behaviors can spread through a troop, but they tend to spread most easily from mother to child. youngsters are attentive and playful enough to imitate their mother's actions, whereas other adults rarely take the necessary interest to learn from each other (McCrone 157).
The modern chimp may be making the first steps toward language. Countless generations of chimpanzees have probably made similar first steps toward speech without their leading to anything, for young chimps do not repeat the close relationship they have with their mothers when they grow up and mix with other adult chimps. They do not pair off with a partner and thus have a chance to develop a more mature two-way form of conversation. Any private language that emerged would almost inevitably be lost with each generation, getting trampled underfoot in the rough-and-tumble world of the adult (McCrone 158).
Evidence of this progression toward more fluid communication skills is demonstrated in recent primate research. In the 1960's and 1970's, the discovery that apes could use hand gestures and symbols to communicate resulted in many primate language research facilities. For example, Koko, a gorilla, was trained to use American Sign Language to express her feelings and desires. Since that time, many great apes have been taught to sign or use symbol communication such as using colored plastic shapes or computer keyboard lexigrams to represent lexical concepts.
Also in the early 1970's, a chimpanzee named Washoe was taught to communicate in American Sign Language (ASL) by Beatrix and Allen Gardner at the University of Nevada in Reno. She was immersed in an environment where she learned to use ASL in daily interactions with her human companions. Washoe learned 132 different words in her time with the Gardners. In time since, four other chimps have also been taught to sign and they, along with Washoe, are the subject of study by Roger and Deborah Fouts. These five chimps, who consider themselves a family, now use many more signs than they were ever expected to learn (Washoe herself can use up to 240 reliable signs) ,and sign not only to the humans, but also to each other to communicate. Washoe even taught her own adopted son to sign without human intervention (Fouts).
Many linguists still believe that apes have no real grasp of human language, but are merely imitating their human companions. They insist that while apes may understand individual symbols or words, they do not understand the concepts of syntax, or how words are put together to form a complete idea. However, evidence is continually proving that the nonhuman primate mind is capable of advanced thought (Rayl 89).
Chimpanzees have shown the ability to communicate using ASL to human observers and other chimpanzees about the normal course of surrounding events. They use signs to create natural language categories; for example, they will sign "dog" when shown many different species of dogs and "shoe" whether it be a slipper or a cowboy boot. They can invent new signs and combine signs to metaphorically express something different, for example: calling a radish "cry hurt food" or referring to a watermelon as a "drink fruit" (Fouts). They can comprehend and produce novel prepositional phrases, understand vocal English, translate words into ASL and even transmit their signing skills to the next generation without human intervention.
Studying how chimps acquire and use sign and other symbolic language gives us a better understanding of how humans acquire language skills and provides another model with which we can study the role of language in communication. It also helps us to better understand the roots of our human language. In addition, chimp language research has been used to help non-communicating children to sign, and has aided autistic, cerebal palsied, and developmentally disabled children (Fouts).
If we view the chimpanzee not as if he were our contemporary, but as if he were some ancestor of ours, the value of studying chimpanzee communication and use of language may be more fully seen. As has been demonstrated, chimps have a rich social life and good communication skills. Many researchers feel that chimpanzees show through their communication that they are developing toward the threshold of speech. The desire and potential for communication of specific ideas is there The conclusion may be drawn that early man about two million years ago must have been at least as socially advanced as the modern chimp, and has since evolved to the language-speaking species we are today.
In the words of Dr. Roger S. Fouts, "While our human awareness and compassion is rapidly expanding to include a greater concern for our biosphere and its inhabitants, our ignorance still remains a critical problem. Fundamental to removing ignorance and replacing it with understanding is communication. We feel that communication is the one behavior most critical for future survival. Washoe has helped replace some of our ignorance about communication with an understanding of ourselves, as well as other beings. This is one reason why we have committed our lives to a research project that focuses on the understanding of communication and chimpanzees."