Oxygen Saturation Levels

Oxygen Saturation Levels: Their Implications
Oxygen is a vital need for every living entity. But how do you go about measuring how much oxygen is contained in your blood, or in the water you drink or in the air you breathe? The answer lies in the term 'oxygen saturation'. Relative measurement of oxygen content that is carried or dissolved in a given medium is termed as oxygen saturation. In a human body, oxygen saturation is a measure of oxygen that is dissolved in blood.
 A normal human body needs a constant oxygen supply for healthy functioning. Low oxygen saturation levels identified in blood can lead to serious and life threatening medical conditions.Normal oxygen levels in body range between 95-100% at sea level. If the percentage goes below the oxygen saturation normal range or drops even less than 80%, it indicates that the blood contains very low level of oxygen. Some facts to remember on this:

• If the oxygen saturation falls below normal oxygen saturation levels (i.e. less than 92%), there is a strong probability of body succumbing to respiratory ailments such as hypoxemia. Hypoxemia is a respiratory ailment diagnosed by symptoms of body ache,fatigue, shortness of breath and confusion.
• As the blood oxygen levels are low, the oxygen is unable to penetrate the walls of red blood cells. In cases of low oxygen levels in the body, people are afflicted with weakening eye sight,memory loss, weakening heart muscles, tingling fingers, chronic cough and water retention at feet and ankles.
• Low oxygen saturation in blood is most possible in cases of already existing respiratory illnesses, retention of excess fluid in body, sleep apnea and inhaling extremely polluted aiR.

Energy Crisis

82% of the energy source used in the world is non-renewable. Fossil fuel alone covers 79% of the world energy demand. The trend of using fossil fuel is further increasing. So it is estimated that fossil fuel reserves will be exhausted in near future.

According to the survey conducted in 1984, it is estimated that the oil reserves can meet the world demand for about 25-30 years. But later on undiscovered deposits are estimated to be found mostly in middle east with capacity more than three times the present reserves. If all estimated oil reserves are discovered and developed it would be depleted by 2076 to 1984 AD usage rate. Along with the development of nations, the demand of fossil fuel is increasing. If oil usage increases at the rate of 2% every year it will be exhausted by 2037 AD. If the source is not conserved and alternative sources are not developed the world will have to face a big crisis of oil in near future.

Formation of COAL

Coal was formed several times at different geological periods in the long history of earth. Most of the coals were formed in Penn sylvaanian period. That was the period from 250 million years ago to 3.5millions years ago.

Coal is the remains of plants and trees mostly giant ferns of swamps or marshy land. These plants got buried into swamp water and protected from rotting. Due to the action of bacteria some parts of plant body (wood) changed into gas and escaped leaving carbon. This process had repeated for many years and the carbon layer became thick and buried under the rock layers during the geological change. Most of the water squeezed out leaving carbon due to the pressure of rock layers formed above and it then hardened to form coal in the long run.

Fastest USB Flash Drive 2010

USB technology based devices have been widely computing in the world.
In this age of technology what grabs attention is speed! With USB 2.0 standard released, the speed was enhanced substantially, yet the flash memory devices have failed till now to utilize the maximum data transfer capacity. The recently launched USB flash drives are trying to break the speed barrier and go beyond. I am sure nobody needs to be explained how to use a USB flash drive, as it is widely used by everybody
Fastest USB Flash Drive
In the USB flash drive sector, there is immense competition as many manufacturing companies are competing with their products. Besides high storage capacity and reasonable cost, one wants high data transfer rate, that can enable rapid copying and transfer of data files and reasonable price of course! Now you can even convert any jump drive into a bootable USB flash drive using appropriate software. Here are the main products in the race to be the fastest USB flash drive (2010). After researching, I narrowed down to three.

Corsair Flash Voyager GTR
The Corsair Flash Voyager GTR has 'Winner' written all over it as it scores high on all counts. The looks, the speed, the capacity, this one has it all. The unique quad channel technology developed by Corsair enables this flash memory device to attain speeds of 34 MB per second, while writing files and a reading speed of 28 MB per second, when reading data. They come in 32 GB, 64 GB and 128 GB capacities. With a tough exterior rubber casing and a 10 year warranty, it is simply one of the best products available today. The 32 GB one comes with a price tag of $95, while the 128 GB Corsair USB Flash Voyager GTR, costs $275.

SanDisk Extreme Cruzer Contour
With a predicted writing speed of 18 MB per second and a reading speed up to 25 MB per second, the SanDisk Extreme Cruzer Contour is a strong contender for the title of fastest USB flash drive. It comes with 4GB, 8 GB, 16 GB and 32 GB storage capacities. The 32 GB drive can be purchased at a price of $116 after discounts.

Kingston DataTraveler 200
With a writing speed of 10 MB per second and a reading speed of 20 MB per second, the Kingston Data Traveller 200 is one of the fastest of the lot available in the market, after the above two. It comes in 32 GB, 64 GB and 128 GB models and comes with a 5 year warranty. The 128 GB Kingston Data Traveler 200 will cost you about $300.