MODULE 5: Emerging Technology

Wireless WiFi Network Power

The emerging technology that i going to elaborate on this module is wireless power (WIFI Network). As we can know, society is deeply reliant on electrically powered devices. Yet, a significant limitation in their continued development and utility is the need to be attached to the electricity grid by wire, either permanently or through frequent battery recharging. Emerging approaches to wireless power transmission will free electrical devices from having to be physically plugged in, and are poised to have as significant an impact on personal electronics as WIFI had on internet use.

Why wireless ?

Here we will discuss about several advantages and disadvantages of the wireless power.

• Convenience- The wireless nature of such network allows users to access network resources from nearly any convenient location within their primary networking environment such as the home or office. With the increasing saturation of laptop style computers, this is particularly relevant.
• Mobility- With the emergence of public wireless network, users can access the internet even outside their normal work environment. Most chain coffee shops, for example, offer their customers a wireless connection to the internet at little or no cost.
• Productivity - Users connected to a wireless network can maintain a nearly constant affiliation with their desired network as they move from place to place. For a business, this implies that an employee can potentially be more productive as his or her work can be accomplished from any convenient location.
• Development - Initial setup of an infrastructure based wireless network requires little more than a single access point. Wired networks, on the other hand, have the additional cost and complexity of actual physical cables being run to numerous locations (Which can even be impossible for hard to reach locations within a building).
• Expandability- Wireless networks can serve a suddenly increased number of clients with the existing equipment. In a wired network, additional clients would require additional wiring.
• Cost- Wireless networking hardware is at worst a modest increase from wired counterparts. This potentially increased cost is almost always more than outweighed by the savings in cost and labor associated to running physical cables.  

Disadvantages

• Security- To combat this consideration, wireless networks may choose to utilize some of the various encryption technologies available. Some of the more commonly utilized encryption methods, however, are known to have weakness that a dedicated adversary can compromise.
• Range- WiFi network have limited range. A typical WiFi home router might have a range of 45m which is 150ft indoors and 90m which is 300ft outdoors.The typical range of a common 802.11g network with standard equipment is on the order of tens of meters. While sufficient for a typical home, it will be insufficient in a larger structure. 
• Reliability - Like any radio frequency transmission, wireless networking signals are subject to a wide variety of interference, as well as complex propagation effects that are beyond the control of the network administrator.
• Speed- The speed on most wireless network (typically 1.54Mbps) is far slower than even the slowest common wired networks (100Mbps up to several Gbps). However, in specialized environments, the throughput of a wired network might be necessary.

Internet Reference of wireless power

Future impacts for wireless power
positive impact:
Wireless power can actually use to transfer electricity and provide a long term electricity to others electronic device such as wireless phone, wireless internet, wireless charging, wireless speaker, wireless remotes, wireless controllers and etc. A system called wireless power transmission technology has indicated the benefit of wireless power in the future. According to WiTricity, their wireless power transmission technology holds numerous benefits in future:

• It has been shown to be up to 95% efficient for many applications, depending upon the distance.
• Electricity can be transferred through common building materials, humans, and even around metals that might block the magnetic fields.
• It is completely safe to animals and humans
• It can be scalable from milliwatts to kilowatts 
• It eliminates the need for all those darned power cords.
• The power sources only transfer electricity when a device or appliance calls for it. No wasted energy.
• The power sources can be placed in almost any OEM application.

Reference of wireless power
We can actually think about it. In the future, there might be only one power source embedded in a structure, no outlets and no cords. You could place electrical devices wherever you want. Your computer workstation and your entertainment center would no longer be a certifiable fire hazard. Your cellphone would never die or annoy you with cries of low battery like chirping bird squawking for more worms.

From the video we able to know that how does the wireless power been produced, and how does the wireless power can be transferred to others electrical device such as cellphone, computer, vehicles,etc.

This video has shows the description of Wi Tricity company product the wireless power device and the advantages. In this video, it has also mention about the wireless power use to charging the fully electrical car. This would be another main point that provide as a positive impacts to the human and future industry.

From my opinion, in recent year electrical car has been promoted and increasing the amount of it, however electrical car having a major problem which is the lack of power source. Through study, i know that certain of electric vehicles only can provided shorten running distance. Therefore, the improvement of the wireless power technology could be able to solve out this problem in the future.