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Communication is going wireless with the upsurge of smart mobile devices such as laptops, cellular phones, PDA, tablets etc. In order escape traps of wires and to stream data wirelessly among these devices, a number of protocols have been formulated such Bluetooth, Wi-Fi, NFC etc. Using these technologies users can exchange almost all sorts of files at high speeds. The speed of data transfer is not a major concern and there is no limit on data size exchanged. Though used for a lot of similar applications, these data exchange protocols have significantly different rule stacks and vary a lot in terms of range, device application etc. This article will detail with some of the common and uncommon differences between two such data exchange protocols: Wi-Fi and Bluetooth.

1. Bluetooth vs. WiFi - Formulation: Bluetooth Technology’s invention has been credited to Ericsson which in the year 1994 launched it as a wireless communication alternative to RS232. Wi-Fi, though had researches since the mid 80s, was officially launched in the year 1997. A committee for development of Wi-Fi was set in the year 1990 which was head by, Victor Hayes who is also known as father of Wi-Fi.

2. Bluetooth vs. WiFi - IEEE Standards: Bluetooth was initially defined under IEEE 802.15.1 standard but is now taken care by a Special Interest Group (SIG). Wi-Fi, on the other hand, is defined under 802.11.x (x=a, b, c, and so on) series of protocols and is currently maintained under the same. A Wi-Fi alliance founded by various companies tests and authorizes gadgets to be Wi-Fi compatible.

3. Bluetooth vs. WiFi - Versions: Since its inception, Bluetooth has seen several versions of it such as Bluetooth 2.0, Bluetooth 2.1, Bluetooth 3.0 and the latest, Bluetooth 4.0. Added technologies such as Enhanced Data Rate (EDR), Alternate MAC/PHY, low energy protocols etc have been implemented in these updates.

Various versions and upgrades are there in Wi-Fi too which are quite different than those in Bluetooth. Since, it is an IEEE 802.11 standard, Wi-Fi versions are termed as 802.11.a, 802.11b and so on. These versions vary in terms of security protocols, radio frequency used for data exchange, maximum speed for data exchange, bandwidth occupied etc.

4. Bluetooth vs. WiFi - .Frequency: Bluetooth works at 2.4GHz frequency while Wi-Fi based networks work at 2.4, 3.6 and 5 GHz .

5. Bluetooth vs. WiFi - Data Transfer Rates: The latest additions to Bluetooth (Bluetooth 4.0) promises data transfer rates to be upto 25mbps while latest Wi-Fi version of Wi-Fi direct can reach upto 250mbps of data transferring rate. Earlier versions of Bluetooth were able to deliver data at 800 hops per second while Wi-Fi clocked up at speeds like 54mbps.

6. Bluetooth vs. WiFi - Range: Maximum range for Bluetooth based wireless connections is 30m while for Wi-Fi, it can extend well upto 100m. In Wi-Fi, range depends on the version of Wi-Fi protocol applied and addition of antennas in the communication system while no such concerns of range or extra antenna are much known in Bluetooth.

. Bluetooth vs. WiFi - Devices Connected: In Bluetooth, upto 7 devices can be connected to each other (piconet) while in Wi-Fi, the maximum connections depend on Wi-Fi router which can accommodate 1 to several communicating devices at a time.

8. Bluetooth vs. WiFi - Connection Complexity: Connecting two devices over Bluetooth is fairly simple as there is just a simple key matching process. On the other hand, connections concerning Wi-Fi need an expertise in configuration and security pass code matching process. This makes Wi-Fi connection process more complex than the Bluetooth ones.

9. Bluetooth vs. WiFi - Security: Earlier versions of Bluetooth were encryption and even now Bluetooth security is limited to key matching. Whereas in Wi-Fi, the security standards have been raised with inclusion of new versions. Wireless Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA) are two most used security accesses used in Wi-Fi with the former being less secure than the latter.

10. Bluetooth vs. WiFi - Power Consumption: Able to works at longer distances and loaded with high quality security protocols makes Wi-Fi a more power consuming protocol than Bluetooth.

11. Bluetooth vs. WiFi - Applicative Scenario: Wi-Fi technology is more used in connecting computers to routers or internet gateways. Moreover, a number of electronic gadgets such as camera, gaming consoles, PDA’s etc. also make use of Wi-Fi to connect to each other or internet.

Bluetooth, on the other hand, is used to connect peripherals to the computer. Computer

keyboards, mouse, headsets etc. can be connected to the CPU using Bluetooth protocol.

There are internet based applications regarding Bluetooth but are less efficient than the Wi-Fi counterpart.

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Green tea is not oxidized (fermented) during its processing, and so its buds and leaves retain much of the naturally occurring chemicals present in the leaves when they grow, which gives green tea its famed health benefits.

Anti-aging Health Benefits

Many of the affects of aging, particularly on the skin, are caused by a build up of free radicals in the body, which can damage and aging of your body's cells. Free radicals do occur naturally, but their concentrations are increased due to exposure to pollution, too much sunlight and some types of chemicals. SOD (superoxide Dismutase) is one of the bodies chemicals that mops up free radicals to help prevent them damaging the bodies cells. Chemicals called catechins that are present in green tea significantly improve the activity of SOD, and so provide a large boost to the bodies ability to fight the affect of free radicals.

Effects on bacterial and fungal infections (anti-bacterial)

A cup of green tea contains anywhere up to 200mg of catechins, that are known to give it's anti oxidant benefits.
However other scientific studies from Brigham and Womens Hospital in Boston, Okayama University in Japan and the National Institute of Chemistry in Slovenia, have backed up what was known in traditional Chinese medicine – that catechins, and so green tea, have a big benefit in helping fend off attacks on the body from bacteria.
It was found that the catechins in green tea inhibit the production of a key enzyme needed by bacteria, called gyrase, which interestingly is also the target of many clinically developed antibiotics. This therefore inhibits the growth of the bacteria, and so reduces the change of getting an infection, and also helps alleviate existing bacterial infections.
The study done in Japan was particularly telling. They found that patients who had been infected with drug resistant Staphlylococcus (staph) responded positively when treated with the catechins extracted from green tea.

Cholesterol Fighting

Several studies have shown that the catechins in teas can act as so-called “hypolipidemics” - that is they lower the amount of “bad” cholesterol in the body (called LDL), while increasing the amount of “good” cholesterol (called HDL). Additionally other studies have suggested that other chemicals in green tea, called flavonols, help reduce hardening of the arteries, by naturally helping to keep the blood thin.
The upshot of this suggests that it helps reduce the chance of cardiovascular diseases, in particular heart attacks and strokes.

Green tea Benefits for Weight loose and reduce Cholesterol

“Drinking green tea everyday makes you thin” is a quote from an ancient Chinese medical text called Bencao Shiyi. 1,300 years and modern science is beginning to understand why.

For a detailed look into the weight loss benefits of green tea, we'd recommend you read Swen Wolfram's review called “Anti-obesity effects of green tea”. We'll just give you a quick rundown of the latest scientific thoughts on how this occurs below.

It appears that there are three compounds in green tea that collectively act together to help reduce weight – the catechins, caffeine and an amino acid called theanine. Researchers did a study with animals, monitoring weight, food intake, fat levels and other health indicators and concluded that these compounds appears to act synergistically to reduce weight gain. You can read there study here for more info.

Another study by Lin and Lin-Shaiu suggested that this action partly occurs because the chemicals help suppress the bodies production of fatty acids, by regulating the bodies gene that is responsible for their production.

Of course weight loss and cholesterol are strongly intertwined. These studies point to the fact that lowering cholesterol helps to reduce your weight, and also the reverse, that lowering your weight will help cut down cholesterol. So whether its the chicken or the egg first, drinking green tea, in combination with a good diet and exercise, definitely supports the ancient chinese observation, that it does indeed act as a good way to reduce your weight.

For more information about Green Tea weigh loss Benefits please check our article on Do Green Tea Weight Loss Diets Really Work

Prevention of tooth decay and bad breath

Fluoride is frequently added world-wide to drinking water and tooth paste as the number one way to help prevent tooth decay. Green tea is a big natural source of fluoride, so this in combination with its anti-bacterial effects provides a great natural way to help strengthen your teeth, prevent cavities and help reduce bad breath.

Cancer prevention

Studies have also suggested that green tea possibly helps prevent the onset of several types of cancers, including lung, prostrate and breast cancers. The possible reason, according to a study at Kyushu University in Japan, is an anti-oxidant in the tea called epigallocatechin gallate (the short form – EGCG – is of course a lot easier to say!).
Another study on bladder cancer suggested that it has potential as a cancer fighting agent, while is proving that the chemicals in the tea are able to target the cancer cells while leaving the healthy cells untouched and alone.

Green Tea Benefit for skin

In traditional Chinese medicine green tea and its extracts are commonly used to prevent and treat a number of skin diseases, including skin cancer. The high content of a different anti-oxidants, called polyphenols, seems to be responsible for this by removing free radicals from the skin before they have a chance to attack the DNA in you skins cells, which otherwise can lead to cancer.
Topical applications of green tea extracts also help protect against UV exposure from the sun, and are used to reduce the impact the sun has on the health of your skin.

It contains a high concentration of polyphenols, chemicals with potent antioxidant properties. In modern Chinese medicine and culture, green tea and its extracts are extensively used in the prevention and treatment of various skin diseases, including skin cancer. The rich polyphenol content in it scavenges free radicals, cell damaging compounds in the body that alter DNA molecules in the chromosomes, inducing harmful mutations that lead to the initiation of skin cancer.

Topical applications of green tea extracts (EGCG) have protective effects on UVA- and UVB-induced skin damage (photoaging and carcinogenesis).

A study done in 2003 at the Georgia Medical College seemed to back this up, by concluding that green tea helps rejuvenate skin cells and protect against ultraviolet damage to the cells.

These results and beliefs all suggest that it might have several significant benefits to your health. But, like all things, it is not any sort of magic bullet that will by itself provide you with benefits, nor do these benefits appear immediately. Many of the benefits found for green tea, only occur after drinking it for an extended time, months or years. This is also backed up by Chinese traditional medicine, where it is recommended as an integral long term part of a healthy diet, not as some immediate fix that will instantly cure diseases.