History of Wireless Technologies

The development of Wireless technology owes it all to Michael Faraday – for discovering the principle of electromagnetic induction, to James Maxwell – for the Maxwell’s equations and to Guglielmo Marconi – for transmitting a wireless signal over one and a half miles. The sole purpose of Wi-Fi technology is wireless communication, through which information can be transferred between two or more points that are not connected by electrical conductors.

Wireless technologies were in use since the advent of radios, which use electromagnetic transmissions. Eventually, consumer electronics manufacturers started thinking about the possibilities of automating domestic microcontroller based devices. Timely and reliable relay of sensor data and controller commands were soon achieved, which led to the discovery of Wireless communications that we see everywhere now.


With the radios being used for wireless communications in the World war era, scientists and inventors started focusing on means to developing wireless phones. The radio soon became available for consumers and by mid 1980s, wireless phones or mobile phones started to appear. In the late 1990s, mobile phones gained huge prominence with over 50 million users worldwide. Then the concept of wireless internet and its possibilities were taken into account. Eventually, the wireless internet technology came into existence. This gave a boost to the growth of wireless technology, which comes in many forms at present.

Applications of Wireless Technology

The rapid progress of wireless technology led to the invention of mobile phones which uses radio waves to enable communication from different locations around the world. The application of wireless tech now ranges from wireless data communications in various fields including medicine, military etc to wireless energy transfers and wireless interface of computer peripherals. Point to point, point to multipoint, broadcasting etc are all possible and easy now with the use of wireless.

The most widely used Wi-Fi tech is the Bluetooth, which uses short wavelength radio transmissions to connect and communicate with other compatible electronic devices. This technology has grown to a phase where wireless keyboards, mouse and other peripherals can be connected to a computer. Wireless technologies are used:

· While traveling

· In Hotels

· In Business

· In Mobile and voice communication

· In Home networking

· In Navigation systems

· In Video game consoles

· In quality control systems

The greatest benefit of Wireless like Wi-Fi is the portability. For distances between devices where cabling isn’t an option, technologies like Wi-Fi can be used. Wi-fi communications can also provide as a backup communications link in case of network failures. One can even use wireless technologies to use data services even if he’s stuck in the middle of the ocean. However, Wireless still have slower response times compared to wired communications and interfaces. But this gap is getting narrower with each passing year.

Progress of Wireless technology

Wireless data communications now come in technologies namely Wi-Fi (a wireless local area network), cellular data services such as GPRS, EDGE and 3G, and mobile satellite communications. Point-to-point communication was a big deal decades ago. But now, point-to-multipoint and wireless data streaming to multiple wirelessly connected devices are possible. Personal network of computers can now be created using Wi-Fi, which also allows data services to be shared by multiple systems connected to the network.

Wireless technologies with faster speeds at 5 ghz and transmission capabilities were quite expensive when they were invented. But now, almost all mobile handsets and mini computers come with technologies like Wi-Fi and Bluetooth, although with variable data transfer speeds. Wireless have grown to such a level, where even mobile handsets can act as Wi-Fi hotspots, enabling other handsets or computers connected to a particular Wi-Fi hotspot enabled handset, can share cellular data services and other information. Streaming audio and video data wirelessly from the cell phone to a TV or computer is a walk in the park now.

Wireless Technology today, are robust, easy to use, and are portable as there are no cables involved. Apart from local area networks, even Metropolitan Area networks have started using Wi-fi tech (WMAN) and Customer Premises Equipment ( CPE ). Aviation, Transportation and the Military use wireless technologies in the form of Satellite communications. Without using interconnecting wires, wireless technologies are also used in transferring energy from a power source to a load, given that the load doesn’t have a built-in power source.

However, the fact that ‘nothing comes without a drawback’ or ‘nothing is perfect’ also applies to Wi-fi technology. Wireless technologies still have limitations, but scientists are currently working on it to remove the drawbacks and add to the benefits. The main limitation is that Wireless technologies such as Bluetooth and Wi-Fi can only be used in a limited area. The wireless signals can be broadcasted only to a particular distance. Devices outside of this range won’t be able to use Wi-Fi or Bluetooth. But the distance limitation is becoming reduced every year. There are also a few security limitations which hackers can exploit to cause harm in a wireless network. But Wireless technologies with better security features have started to come out. So this is not going to be a problem for long.

Speaking of progress, Wi-Fi technology is not limited to powerful computers and mobile handsets. The technology has progressed enough that Wi-Fi enabled TVs and microwaves have started appearing in the markets. The latest and the most talked-about wireless technology is the NFC or Near Field Communication, which lets users exchange data by tapping their devices together. Using wireless technologies are not as expensive as it used to be in the last decade. With each passing year, newer and better wireless technologies arrive with greater benefits.

The Value of Technology in Educating Young Children

Are young children well suited to the use of technology? Modern technologies are very powerful because they rely on one of the most powerful genetic biases we do have – the preference for visually presented information. The human brain has a tremendous bias for visually presented information. Television, movies, videos, and most computer programs are very visually oriented and therefore attract and maintain the attention of young children. When young children sit in front of television for hours, they fail to develop other perceptions. But the technologies that benefit young children the greatest are those that are interactive and allow the child to develop their curiosity, problem solving and independent thinking skills.

Technology plays a key role in all aspects of American life which will only increase in the future. As technology has become more easy to use, the usage of it by children has simultaneously increased. Early childhood educators have a responsibility to critically examine the impact of technology on children and be prepared to use technology to benefit children. Children educators must be more responsible in bringing a change in the lives of children and their families.

There are several issues related to the use of technology by young children:

• the essential role of teacher in evaluating in evaluating appropriate use of technology.
• the amalgamation of technology in early childhood programs
• stereotyping and violence in software
• equitable access to technology
• implication of technology for professional development
• role of teachers and parents as advocates

A teacher’s role is critical in making good decisions regarding the use of technology in order to achieve potential benefits. Choosing the correct software is quite similar to choosing the perfect set of books for a classroom. Teachers should take the advantage of computers to introduce new teaching and development strategies. Computers are intrinsically compelling for young children. The sound and graphics attract a child’s attention. An appropriate software engages children in creative play, mastery learning, problem solving, and conversation. Children control the pacing and the action. They can repeat a process or activity as often as they like and experiment with variations. They can collaborate in making decisions and share their discoveries and creations. Well-designed early childhood software grows in dimension with the child, enabling her to find new challenges as she becomes more proficient. Appropriate visual and verbal prompts designed in the software expand play themes and opportunities while leaving the child in control. Vast collections of images, sounds, and information of all kinds are placed at the child’s disposal. Software can be made age appropriate even for children as young as three or four. This shows that technology can enhance a child’s cognitive and social abilities. It provides a window to a child’s thinking.

Every classroom has its own guiding philosophies, values, themes and activities. Early childhood educators should promote equitable access to technology for all children and their families. Modern technologies are very powerful as they rely on one of the most powerful biases we have. The problem with this is that many of the modern technologies are very passive. Because of this they do not provide children with the quality and quantity of crucial emotional, social, cognitive, or physical experiences they require when they are young.

Unfortunately, technology is often used to replace social situations but it should be used to enhance human interactions. During the current decade, research has moved beyond simple questions about technology. Very young children are showing comfort and confidence in handling computers. They can turn them on, follow pictorial directions, and use situational and visual cues to understand and reason about their activity. Typing on the keyboard does not seem to cause them any trouble; in fact, it seems to be a source of pride. Thanks to recent technological developments, even children with physical and emotional disabilities can use the computer with ease. Besides enhancing their mobility and sense of control, computers can help improve self-esteem.

Thus the exclusive value of technology is no more in question. Research shows that what is solid for children is not merely what is physical but what is meaningful. Computer representations are often more manageable, flexible, and extensible. To add more there are a number of specialized programs that allow children with certain information-processing problems to get a multimedia presentation of content so that they can better understand and process the material. Even now there are a number of good software programs with a primary educational focus on mathematics or reading. These programs, which are very engaging, motivate children to read better and learn how to solve math problems. When information is presented in a fun and way, it is a lot easier than looking at a single page that has a bunch of columns of numbers you’re supposed to add up.

We are always in search for the magic wand that vanish and solve all our programs. And today the magic wand in our life is technology. It not only increases academic skill, reduce dropout rates but also diminishes the racial divide in academic performance. The danger, however, is that computers will be used only to reinforce the national trend toward earlier and more academic skill acquisition, and that other important developmental needs will be ignored. Moreover the fear will remain that developmental needs not met through technology will be ignored or radically compromised: physical play, outdoor exploration of the community and of nature; art, music and dance; learning specific social skills and moral values, and experiencing diversity in a myriad of ways.

In most of the early childhood programs and schools, technology will be part of the learning landscape of the future. To make sure this new technology is used effectively, we must assure that teachers are fully trained and supported, and that the programs and internet sites used are developmentally appropriate, non racist, non-biased against people with disabilities, and respect religious differences.

March of the Green Technology

Technology has been defined in several ways. The simplest is the knowledge of using tools and techniques to improve the working condition, organizational management and artistic perspective in order to improve the efficiency of product, machine or human efforts. The primitive man is known for intelligent use of stone to convert it into weapon and shelter houses. The use of animal skin and bark of trees for covering body was a step towards fabric technology. The knowledge of technology to control the fire radically changed the status of man learning to add new items in his food menu and getting warmth in a cold climate. The wheel has brought us to the present state of global conveyance Flinging of leg bones into the space after a good and hefty meal inspired space odyssey. Information technology spear headed by internet has its origin in smoke signals and more recently to printing presses. Now we have industrial, educational, information, medical, visual, micro, nano, and domestic technology to name a few.

Technology is not singularly applied by human kind to give impetus to his objectives. The animals and birds have also excelled in carving out technological wonders comparable and sometimes better than us. The nest of the weaving birds, signals from dolphins, breaking of coconut shells by monkeys, domestic technology of ants, technology of descent from an acute slope by elephants, migration of birds to places akin to their need and requirements, waiting for air to become hot before taking to a flight by kites and other heavy size birds and dropping of stone pallets to raise the water level in a narrow necked pitcher by crows are some to refresh the memory. Look towards the sky in the evening. You shall find ducks flying in inverted V formation, giving others the advantage of vacuum and stream line motion.

There is a difference in how the primates of yester years behaved, how animals and birds around us make use of the technology and how we are using it. The difference is great. Their efforts were and are always in improving their living condition compatible to the environment. Our efforts are diversified in many ways. Some are good, some are bad and some are ugly. Lately, with the onset of industrial revolution, we have mostly added to pollution load of the environment or developed weapons of mass destruction. Technology which used to improve machine efficiency has focused its attention to human efficiency. We call it productivity. We pretend to exploit it as outsourcing. Green technology had no option but to introduce it and take charge of the entire state of affairs created by the human kind.

Green technology targets for an appropriate, equitable and sustainable environment by interlacing all known technologies and human involvement with environmental science to conserve and upgrade the environment and bringing it back to the quality available some 300 years back. Green technology could be termed as a refinement in the available technology in as much as, it helps in managing pollution of all kinds in such a way that these turn out to be ecological and economically friendly.

Technologies that are green are rated by their carbon footprints. A competitive and successful green technology has a low set of greenhouse gas emissions from persons, product, process, event or organization. There are two ways to achieve the objective. The first which may be termed as green acts, is to recycle the waste, reuse through reconditioning and other alternatives, reduce resource consumption and to conserve available natural resources. The second which is creating a green conditions, is to evolve technologies that reduce greenhouse gas emissions thus reducing carbon footprint. These measures have proven effect on global warming reduction.

The first category of green technology is to encourage and redefine the conventional ways of keeping carbon footprints at a low level. These are recycling and its extension to water and air purification, solid waste treatment including sewage treatment.

Recycling defines environment by conservation at its best. Used materials generally thrown as waste is recycled into new products. Composting is an age old concept of recycling green waste into manure. Recycling plastic waste into new plastic products is most prevalent now. Recycling reduces fresh raw material consumption by utilizing middling and scraps. It reduces wastage of energy that is required to convert fresh raw material into end products It reduces air pollution as waste is now recycled instead of incineration. It reduces water pollution as there is less land filling thus reducing leachate reaching water bodies.

Waste water is purified by chemical, mechanical and biological processes to convert it into drinking and other usage. Air is purified both in industries as well as places of human habitation in closed spaces. Industrial air pollutant such as Sulfur oxides gives back Sulfuric acid, particulates such as fire ash is converted into cement and bricks. Solid waste generation from human habitat is segregated into bio-degradable and non-bio-degradable waste. Bio-degradable waste is composted into manure and bio-fuel. Non-bio-degradable waste is further separated into metal, glass, plastic etc. The first three are used as intermediate raw material and recycled into the production pipeline to get useful products. Hazardous waste materials are suitably treated to non-hazardous entity and then most of these are also recycled. Sewage treatment has acquired a state of the art technology. It is treated to make it free from parasites, bacteria, fungi, algae and viruses. Treated solid waste is used as manure and the treated waste water is either used for irrigation or further treated to make it fit for domestic use.

Green technology that creates and sustains green condition has focused its attention primarily on renewable energy resources. Renewable energy such as solar, wind, tidal, nuclear and geothermal have been identified as having minimum greenhouse gas emission and has tremendous potential to replace the conventional energy providers such as fossil fuel and petroleum. The latter are non renewable energy resources that are major pollutants and major reasons for greenhouse gas emissions.

Green products are a category in itself as it has both the properties of reducing greenhouse gases and replacing highly polluting non-renewable energy resources. Fuel cells are one example. It eliminates air pollution from automobiles and it replaces hydrocarbon fuel. Plastic cement manufactured from waste plastic bottles is another example. This product takes less energy for its preparation than the conventional cement manufactured from iron slag, lime and sand. Moreover, this plastic cement has more permeability and hence can breathe better. Rain water can filter through surfaces prepared from it and hence enrich the water table beneath.

These days, market is getting flooded with toxic plastic toys which are highly injurious to the delicate and tender toddlers. These are being replaced by toys made from recycled plastic bottles. The latest innovation in this segment is fabric made from used plastic bottles material. Dress material for Cricket India members are made from this fabric.

Green technology is catching fast the computer software segment too. Now there is software which shall alarm you from wastage of electricity while you are in your home or at the other side of the globe.

There has been a lame excuse floating around that shifting to green technology requires too much research and development and the cost of implementation is very high. It may be appropriate for some such endeavors such as technology for geothermal energy usage. It is also argued that it takes lot of time to break even. Here, people fail to compare such logic with technologies that are in use and later revised to green technology. An instance in case is the steam engine which saw transition to diesel engine and now almost replaced by electric engines and in near future with electromagnetic induction forces and magnetic forces. A time cycle would show that invention and commissioning of coal driven steam engine took a far longer maturing time than electric engine or the future versions. All such transformations are far too profit friendly. Break-even time has also been quite low.

You may expect wonders in the future with the advent of nano technology. Imagine a chip grafted in your brain to replace computers which are one of the major consumers of electric energy and are generating huge electronic waste. You should start dreaming of recharging your space vehicle with universally available solar energy replacing high cost, highly pollutant and heavy weight, cryogenic fuel. You may have the pleasure of travelling in identified flying objects to several light year distant part of the universe.