Posts Tagged ‘NASA’

What Is A Memory Foam Mattress?

Sunday, November 20th, 2011

Have you ever heard of a memory foam mattress? Memory foam has actually been around since 1966 when it was developed by a team of NASA scientists, who were looking for ways to make aircraft cushions safer. Therefore a memory foam mattress is a mattress made from this space age foam, although modern memory foam has been hugely improved since those early days. The problem with the early foam was that it was too brittle, so it crumbled within a few years.

Nowadays, memory foam will conform to a body’s shape by reacting to a blend of body weight and body heat depending on the density of the foam. One of the earliest uses of memory foam was in hospitals where it was found that memory foam could ease pressure on the parts of the body coming into contact with the foam, which reduced the occurrence of bed sores and gangrene in long-term bed-ridden patients.

The first memory foam mattresses were very costly and only institutions such as hospitals could afford them. However, over the last twenty years, the price of memory foam has fallen dramatically and so these super mattresses are now within the grasp of almost everyone who needs or wants them. There are options to the traditional memory foam mattress as well, there are memory foam pads and cushions and pillows as well.

The use of this special foam has flooded into other regions of our lives as the price of it has dropped. Memory foam is now used in car seats, wheelchair seats, kids’ high chairs, earplugs, gloves and office furniture. In fact, this new foam is now used to produce many items that have to be worn or used for long periods of time - golf gloves as well for example.

Although the price of these memory foam mattresses has dropped significantly they may still be too expensive for everyone in large families to have one each. In this case you could go for mattress toppers which are otherwise called mattress pads. These are meant to be laid on top of the mattress but under the bottom sheet. They are cheaper because they are normally between two and four inches thick.

However, be careful with cheap toppers because any foam memory foam topper that is thinner than two inches thick is prone to be ineffective. Likewise, bigger is not always better, because some individuals find memory mattresses that are over six inches thick are too stiff to sleep on.

Check the warranty as well. Some high-density mattress pads of two inches thickness will crumble within a couple of years, so a two year guarantee means that you will get at least this length of time out of your memory foam mattress or mattress pad.

Owen Jones, the author of this article, writes on many subjects, but is at present concerned with the college for massage therapy. If you have an interest in massage, please go over to our website now at Classes For Massage Therapy

Memory Foam Mattress Toppers: Some Facts

Thursday, April 21st, 2011

Memory foam may seem like a brand new product to most people, but in fact it has been obtainable commercially for over forty years. From the early days until fairly recently it was mainly obtainable in the form of mattresses, pillows, cushions and the type of padding that you get on doctors’ couches and wheel chairs. It was very expensive, so it was not thought to be commercially viable for the mass market.

That has all altered over recent years as production costs tumbled. These days, almost anyone can afford a mattress, mattress topper or cushion manufactured out of memory foam. Memory foam mattresses and mattress toppers help many people to settle comfortably and sleep well because memory foam moulds itself to the shape of the body, thus supporting the body on a greater surface region than a regular mattress or cushion would.

Memory foam mattress toppers are a means of converting your present ordinary mattress into a memory foam mattress and they are cheaper than the full job too. They can assist people with bad backs or sore joints, sufferers of arthritis and gout and people who perspire a lot. These toppers can assist those who perspire a lot because memory foam ‘breathes’ unlike traditional foam.

A real memory foam mattress is designed to provide maximum comfort in the manner described above and is the correct thickness for that job, but a mattress topper is like a conversion kit, so can it honestly convert a regular mattress into a memory foam mattress? This is a tricky question, because the answer, as it so often is, is that it depends.

It depends on two items: the sort of mattress that you are setting the topper on and the quality of that topper.

Firstly, in order to be effective the topper has to be on a fairly stiff surface or it will merely sink into the existing mattress and most of the benefits it can provide will be lost or absorbed into the mattress beneath.

Secondly, the topper has to be thick enough so that you can sink into it without hitting the bottom so to speak. If it is not thick enough, it would be like trying to float in a bath tub. If you need to, you could place a sheet of plywood on your mattress first to stiffen it up.

Secondly, the topper has to be deep enough so that you can sink into it without hitting the bottom so to speak. If it is not thick enough, it would be like trying to float in a bath tub. If you need to, you could lay a sheet of plywood on your mattress first to stiffen it up.

Most memory foam mattress toppers on the market are two inches thick and this is certainly the minimum you need for it to be effectual. Less than that is really a waste of money, unless it is planned for a baby. By the same token, three or four inches is a lot better, particularly if the user is on the heavy side.

The foam also has differing density. The low density foams, 2.5-3.5 lb foam, reacts more to body warmth and so is usually better for lightweight people, whereas the high density foam, 5 lbs and above react to heat and pressure (or weight) so are more effective for heavier people.

One last thing, if you use an existing mattress topper made from something else, you will not be able to put it on top of your memory foam mattress topper.

Owen Jones, the writer of this article, writes on a variety of subjects, but is now involved with the Visco Elastic Mattress. If you would like to know more, please visit our website at Egg Crate Mattress Pad For Sale.

Memory Foam Pillows

Wednesday, April 20th, 2011

Nearly all people expend a third of their lives in bed. Everybody knows that. Eight hours at work, eight hours ‘at play’ and eight hours asleep. We even say: ‘I have to get my eight hours beauty sleep’. I know that some can do with less and that children, especially teenagers, it seems, require more. So, it makes sense to pass those eight hours a day, or night, as comfortably as possible, does it not?

After all, you would not like to work at a desk that was too low or too high and you would not like to walk around in shoes that pinched. It is the same. You have to have the tools that allow you to do the job as easily as you can and the tool for sleeping is a bed and its bedding.

In fact, the bed and the bedding should be chosen somewhat carefully if you are going to get the best night’s sleep possible, which means that no-one can purchase a bed for you and be sure of making the correct choices. There is more chance of getting it right with some materials than others and one of those materials is memory foam.

This is because memory foam moulds itself to the shape of a body by reacting to its heat and weight. It provides more support over a greater area than conventional materials, This is most important in the mattress and the pillow. Some people have to have or prefer a stiff or a soft mattress, that is personal preference, but the pillow is more universal.

All our heads and necks are pretty much the same. However, once again memory foam pillows are that little bit more adaptable to each individual’s characteristics. However, you would be wrong to suppose that all pillows are the same size like the customary cotton sack filled with feathers or whatever. Foam, conventional or memory, can be cut to any shape and some people find wedge shaped pillows more comfortable.

Then some people prefer small pads for cushions and others prefer four foot bolsters. There are even sectional pillows made up of up to a dozen pieces that you can assemble into practically any design.

Memory foam pillows return to their original contours when you get off them. It might take an hour but that is why they are called memory foam pillows. This means that they do not need fluffing up every now and again. Being inorganic, they are hypoallergenic, impervious to mildew and dust mite resistant, which will help a lot of allergy sufferers.

Memory foam pillows are comfortable for sleeping on your back or side. They are not the cheapest pillows on the market, but the cost is coming down all the time and they will last quite a few years if you get a good one. See if one of your local retailers can show you a sample or even permit you a thirty day satisfaction guarantee then you have no risk.

Owen Jones, the writer of this piece, writes on a number of topics, but is now concerned with Marriott bedding. If you want to know more, please visit our website at Modern Throw Pillows For Sale.

Astronomy: Wallpaper

Wednesday, January 6th, 2010

Astronomy is the study of the galaxies. Some astrologers practice it as a serious science while for others it is an interesting hobby. For this reason, whenever an astronomy picture of the day is offered to the general public, people usually jump at the chance of looking at it. There are thousands of astronomical pictures to choose from, and plenty of interesting celestial objects to keep people enthralled.

NASA of course is a primary source for an astronomy picture of the day. This site NASA.gov shows a new image each and every day. There’s also another section that shows video footage. This could be used to create your own image site. Saturn’s moon Enceladus was featured on November 5, 2008.

That picture was taken by a passing spacecraft. It can reproduce details the size of a bus. The ice on this moon reflects as glare, nearly 100% of all the sun light that hits it. So you would need to wear sunglasses! This moon is so unusual that Cassini will continue to fly by for more photos later in its mission.

NASA maintains an archive of all the astronomy image of the day dating all the way back to June 16 of 1995. It was a ‘what if’ footage of the Earth posing as a neutron star. The footage is a computer generation. The most interesting feature is that the constellation Orion is visible twice. Even light from behind a neutron star is visible because the dense star bends the light all the way around it. This causes some double vision.

The entry for September 8th, 1995 was an amazing photo of the central part of the ‘Milky Way’ galaxy taken by NASA’s COBE satellite. This area is usually invisible because of the dust masking it. But COBE scans in infrared, so produced that amazing image of our very symmetrical galaxy.

The astronomy picture of the day was the same on January 1st, 2000 and January 1st, 2001. The explanation why both dates displayed this picture is that most people thought of the year 2000 as the first year of the third millennium.

However, the third millennium actually commenced on January 1st, 2001. NASA reasoned it was just easier to just go with the flow and do it on both dates. apod.nasa.gov/apod/ap010101.html shows mankind’s view of the solar system as it progressed from mere objects circling the Earth, all the way to the ‘Big Bang’ creating the universe as we see it today.

NASA has many more days with their very own unique astronomy picture of the day. Visit their web site, NASA.gov to view them.

Astronomy: pictures of the day are fascinating to vast numbers of people. If you are fascinated by astronomy, go along to our website at: http://astronomy.the-real-way.com

Astronomy: Some Facts

Tuesday, December 15th, 2009

How much is there to be known or learned about all the objects and phenomenon in the entire universe? Remember that there are about 1 x 10 ^22 stars in the universe, that’s 10,000,000,000,000,000,000,000 stars; then that many of those stars have planets spinning around them. Then think about all the moons that orbit those planets and the comets and asteroids, the galaxies these stars form, the nebulae and black holes and everything else that’s out there. The amount of information and data is really quite staggering. This article certainly won’t contain every fact about astronomy. But they are very interesting facts nevertheless.

Let’s take a look at a small subset of astronomy: “the brightest stars as seen from Earth”. That’s discounting the Sun which is about 250,000 times closer than the next nearest star. It’s so bright that when the sky is viewed from the Earth, it washes out all the other stars in the sky during a phenomenon called daylight.

Remember that according to the scale for the magnitudes given, lower numbers are brighter. Our Sun would be about -26.73, while the full moon is -12.6. So, with that in mind, here are the top 5:

#5 is Vega, which is in Lyra, and which means ‘falling eagle’ in Arabic. It’s about 25 light years away from the Earth, with a magnitude of 0.04.

When you are thinking about these astronomical facts, please bear in mind that the ‘brightest from the Earth’ doesn’t mean ‘largest’ or ‘brightest’. The Sun is not the largest or brightest star in the universe or even the galaxy, yet it seems so bright to us because it is near compared to the other stars.

#4 Rigel Centaurus - a very bright, bluish-white supergiant star in the constellation Orion. It is a binary star, with an average apparent magnitude of 0.12. It’s scientific name is Beta Orionis. ‘Rigel Centaurus’ is Arabic for ‘the foot of the centaur’. It’s about four light years from Earth.

#3 is Arcturus. The name is Latin/Greek and means ‘guardian of the bear’. This star is roughly 37 light years away. It is in the constellation of Bootes, behind The Great Bear. It has a magnitude of 0.00

#2 Canopus. Of the top five, Canopus, the Greek name for the pilot of the ship Argo in the stories about Jason and the Argonauts, is the brightest, but because it is 313 light years from Earth, it’s only second on this list of the five brightest stars seen from Earth. It has a magnitude of -.62.

#1 is Sirius, which translate from the Greek as ’scorching’. It’s also sometimes called the ‘Dog Star’ because it is the brightest star in the constellation of Canis Major, which means ‘The Big Dog’ in Latin. It is situated only 9 light years from Earth, which makes it easily the second closest of these top five. It has a magnitude of -1.44, which makes it very easily the brightest star that can be observed in the night sky.

These few data don’t even scratch the surface of subject of astronomy but it’s something for you to think about the next time you gaze up into the night sky.

Are you interested in Astronomy for Beginners? If you are then, please visait our website at http://astronomy.the-real-way.com

Astronomy: Wallpaper

Friday, May 22nd, 2009

Astronomy is the study of the cosmos. Some astrologers practice it as a serious science while for others it is an educational pastime. For this reason, whenever an astronomy picture of the day is offered to the general public, people usually jump at the chance of looking at it. There are many of astronomical pictures to choose from, and plenty of interesting stars to keep people enthralled.

Of course ,NASA is one of the primary sources for an astronomy picture of the day. This site, NASA.gov, shows a new photo each and every day. There is also a section that shows films. These could be used to create your own photo site. Saturn’s moon Enceladus was the ’star’ feature on November 5, 2008.

This footage was taken by a passing spacecraft. It can reproduce details the size of a bus. The ice on this moon reflects as glare, nearly 100% of all the sun light that hits it. So you would need to wear sunglasses! This moon is so fascinating that Cassini will continue to fly by for more images later on in its mission.

NASA maintains an archive of all the astronomy picture of the day dating all the way back to June 16 of 1995. It was a ‘what if’ footage of the Earth posing as a neutron star. The picture is a computer generation. The most interesting feature is that the constellation Orion is visible twice. Even light from behind a neutron star is visible because the dense star bends the light all the way around it. This causes some double vision.

The entry for the 8th of September, 1995 was an amazing image of the internal section of the ‘Milky Way’ galaxy taken by NASA’s COBE satellite. This area is usually invisible because of the dust obscuring it. But COBE scans in infrared, so produced that fantastic photo of our very symmetrical galaxy.

The astronomy picture of the day was identical on January 1st, 2000 and January 1st, 2001, the reason being that both dates shared this photo is that most people thought of the year 2000 as the first year of the third millennium.

However, the third millennium actually started on January 1st, 2001. NASA decided it was just better to just go with the flow and do it on both dates. apod.nasa.gov/apod/ap010101.html depicts mankind’s view of the universe as it developed from mere objects circling the Earth, all the way to the ‘Big Bang’ creating the universe as we see it today.

NASA has a lot more days with their very own unique astronomy picture of the day. Visit their web site, NASA.gov to view them.

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