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This model is year old now and is an upgradation to its preceding model the A550. This model boasts enhanced features than that of its previous model launched sometime before it. It offers a 7.1 mega pixel image resolution to its 2.5-inch color LCD screen.

The main handy feature that stands out is the face-detection autofocus which allows the user to get the focus on the face of the image. This canon digital camera does so by surrounding brackets around the faces it has a focus on and allows the user to adjust the exposure and the lighting. This USP of the model was highlighted in their Ad campaign and it is also the best feature of the camera that works better than its other rival models.

The camera adopts a 4x zoom and captures detailed images thanks to its 7.1 mega pixel resolution. The receptiveness of the zoom is fast and at a click of a button. The start up of this digital camera is fast and it takes about a 1.6 sec delay between the shots. The continuous mode is a bit lethargic and manages about 1.3 frames per second. The other special features include Still frame sound caption recording, Creative Effects menu, Auto White balance including five preset white balance modes and custom white balance setting capability, DPOF (Digital Print Order Format) compatibility.

This canon digital camera weighs around 165 grams without the battery and is not very sleek but it does fit in bags and pockets. It is not for the people who look out for very sleek and slim models. It is a subcompact camera and is high on features. It can run on a pair of AA battery supply or rechargeable AA size Ni-MH or through its AC adapter kit. The batteries seem a better option for avoiding the carriage of the adapter and can also be used as a back-up power source.

This canon digital camera is available with a 16MB Multimedia Card but can also be upgraded with SD Memory Card, SDHC Memory Card. The LCD display takes the rear of the camera and provides better viewing of the images and videos. Priced reasonably it is a good bet for portable, user friendly, feature oriented users.
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Since man's advent on the planet, we have always been fascinated by the outdoors. Although the world infrastructure has since changed and there are more buildings and the world looks more like a concrete jungle, the allure of the outdoors has not left man. Weather permitting many individuals and families still find themselves walking jogging, going for picnics, camping and other exciting recreational activities. Because of the time spent outdoors, people now carry their electronic gadgets with them when venturing outdoors. In the last 20 years we have seen the musical devices such as the walkman and Discman become popular and now the IPod has hit the consumer market. With the Discman, one could easily carry their favorite music with them anywhere they went. The IPod comes with a set of quality earphones. As MP3 devices and IPods have evolved, outdoor wireless speakers have also evolved with them. The classic IPod now comes with a capability of adding external speakers meaning that one need not necessarily listen to their music alone.

Wireless speakers have been a welcome addition to the world of outdoor electronics especially IPods. This is because for the IPod, bulky CDs were eliminated and music is transferred digitally from its source, in this case ITunes, directly to the IPod. And with the colossal storage capacity of the IPod, people could now travel outdoors with thousands of tunes in their IPod device. With outdoor speakers, a group of outdoor enthusiasts could enjoy an endless stream of musical playlists in CD-quality fashion wherever they are.

Due to the fact that many people now use computers are multimedia gadgets to watch movies, stream sound and video, attend conference calls, use voice recognition software to dictate writing and the like, computer speakers have not only become an absolute necessity but have become more and more sophisticated.

The major outdoors computer manufacturers are Dell, Compaq, HP, Acer, AIWA, JVC, Creative Labs, Harman Kardon, Bose and Samsung, all of who are also household names when it comes to consumer entertainment electronics. Bose speakers are especially in high demand although because of their high quality, can be a little pricy. Other companies such as Apple also create outdoor wireless speakers for their portable musical gadgets.

For a price of around $200-400, one can get some quality wireless outdoor speakers which promise a rich sound regardless of where one is located. Outdoors speakers have become popular owing to their convenience. They can be easily carried and then deployed out of site where they do not hinder any social activities and all this without compromising the sound quality.

One downside with outdoor speakers is the fact that they are battery powered. This has its own limitations in that in the event that the batteries strength begins to diminish then the quality of sound will also begin to suffer. The length of the musical experience is therefore limited to how long the batteries last. If the outdoor event continues for an extended period then the cost of batteries can be high.

One of the great impediments to a great outdoors experience whether it be at the pool or at a camp site was the fact that most music gadgets that people carried were old fashioned; not only requiring batteries but also if it was a sound system the speakers were attached to the actual musical device. This meant that the quality of music was somewhat compromised due to the wiring involved between the speakers and the actual unit. But technology has since advanced and this scenario need not be the case all the time especially for those in love with the great outdoors. Wireless outdoors speakers are here and those that want to carry their IPods to the pool or a picnic or an outdoors camping expedition can now do so with quality acoustic mini speakers to enrich their musical experience. But first of all, let us see the concept behind wireless outdoor speakers.

Wireless speakers are powered by the same technological concept that works in radios. When music is being played, a device inside the speakers picks up the wireless signal and converts them to digital signals and then transmits them to the speakers. A digital amplifier inside the speakers decodes the signal and this comes out as sound. This essentially means that the signal is sent as analog but is transmitted as digital by the digital decoder inside the speaker system. This translates to very quality sound.

The range of wireless speakers can be said to be the same range that one would receive with a good cordless phone. This can be about 900MHz. One plus about wireless speakers is that the signal can transmit through walls making it convenient for users. No cables are needed to connect between the speakers and the tuner/receiver. The speakers also come with a tuner knob which can be used to tune the signal to the best frequency.

Wireless speakers are very convenient. They can be placed in any direction to the discretion of the listener and can transmit sound in any direction. This can be ideal for a group setting and the speakers can be placed out of the way where they will not hinder social activity.

Wireless speakers have become especially popular with outdoor recreational activities. This is because rather than each person coming with their own musical device, the whole group can listen to the same speakers which can be conveniently placed out of sight.

One downside to wireless speakers is that even though the name suggests they are wireless, they do require an electrical cord that runs from the speakers to the wall outlet. Another downside is that the speakers, although elegant, cannot guarantee quality sound past a certain distance from the tuner. This is because the signal gets weaker with distance. The signal being decoded can also experience interference especially if there are other wireless devices in the vicinity such as cell phones and other Bluetooth devices.

With many consumer electronics music market becoming more and more dynamic and mobile, many , manufacturers have shifted into wireless gadgets which cater to an increasingly mobile market. From cell phones to IPods, people feel the need to break free from their mundane everyday toys which tie them to one place. They now want to go wireless. Traditionally, music speakers have been more or less stationery and attached to the main musical tuner via a spaghetti mesh of cables.

As we are all aware, this arrangement has its inherent dangers. Children playing with these wires can unplug them and interrupt the sound. This is not to mention the danger of tripping and falling on the wires. Convectional speakers with the crisscrossing wires are also unsightly and do not contribute to good interior decor of the room.

There has also been instances where the wiring and cables from electronic gadgets such as speakers has contributing to fires. The answer to all this is wireless speakers.

Wireless speakers are gaining in popularity. They are small, attractive and because of their lack of wiring running from the musical unit to the speakers. Electronic manufacturers that make wireless speakers cater to the exotic market that is interested in diminutive size without sacrificing the quality of the sound and this is perfectly the case with wireless speakers.

Wireless speakers as we mentioned have gained their popularity from the fact they are very convenience. Coming in smaller size than conventional speakers, wireless speakers can be placed inconspicuously under the couch and other places where they are not so obvious and where their appearance does not influence the interior decor of a room. This results to less clatter. They can also be positioned strategically where the sound will be best. Because of their smaller size wireless speakers can also be easily transported.

Wireless speakers use the same technology that is used to transmit radio waves only this time it is analog sound waves that are transmitted. Then a device located in the speakers decodes the signal from analog to digital and converts it into sound. All this is done instantaneously. A great advantage with wireless speakers is that the sound can actually be transmitted even through walls. This means that the speakers do not have to be physically located where the musical device is located. This reduces the chances of damaging the tuner or musical receiver. A good example would be placing small surround sound speakers in the bathroom or washroom while the actual digital player is far away in another room where there no risk of water-damage.Wireless speakers can also be placed strategically in different places in the room for maximum sound effect.

Since the 1980s the way we travel with our music has come a long way. Many no doubt remember the portable Walkman that used cassettes and which was made by Sony. The Walkman made it possible for joggers, travelers and just about anyone who wanted to carry their music and other taped sound with them wherever they went. Then the Discman towered over the Walkman and quickly became popular due to the CD-quality sound that it afforded. Two companies, Phillips and Sony were major players in this transition from cassette to CD. As quickly as CDs took the world by storm, musical gadget inventors quickly zeroed in on limitations. For instance, a CD, just like the 50s, 60s or 70s vinyl record, could be scratched and damaged. CDs also had a maximum of 10,000 plays before it became history and could be damaged by extremes of temperatures, for example leaving them in a hot car. CDs were also cumbersome to carry, especially if you had many. The answer? Apple's iPod.

The iPod is a musical gadget like no other. It boasts a high-capacity and can therefore store hundreds of CDs in a tiny space! This was welcomed by music enthusiasts because it meant no longer traveling with large CD carriers and cases and one could not easily download music directly from legal music sites such as iTunes onto the iPod and store thousands of songs in perfect digital format.

The advent of the iPod has also meant the rise of a sub-market for devices related to the iPod. One of them is the market for wireless outdoor speakers which can be used with the iPod. It is understandable that some people want to listen to their iPods using their private headsets. But there are occasions where one is in a group setting and it would therefore be rude for them to be using their headsets. In such a case, outdoor speakers suffice.

There are many outdoor speaker brands that are in the market right now. One of the industry leaders in this department is Logitech. Logitech has been making computer speakers and accessories for a while now and for an around $100-$200 you can get some quality IPod speakers.

Another respected firm is Altec Lansing which made a name for itself with studio speakers and car stereo equipment. A pair of good iPod Altec Lansing speakers will cost you somewhere around $150.00. These are the standard type. If you want to upgrade then you might want to consider purchasing the InMotion i600 and the Pure-Fi Dream which can run you close to $200.00.

If you have more change to spare for your iPod outdoors speakers, then the Chestnut Hill Sound George is what you're looking for. With their exceptional sound quality, these speakers can be costly, running around $500.00 or more. It can be said that you get what you pay for. If you are serious about the quality of your sound, then you want to invest somewhere above $200.00 or even better, get the Chestnut Hill Sound iPod speakers.

CO2 from the atmosphere and water from the earth are combined in the photosynthetic process to produce carbohydrates that form the building blocks of biomass. The solar energy that drives photosynthesis is stored in the chemical bonds of the structural components of biomass. If we burn biomass efficiently oxygen from the atmosphere combines with the carbon in plants to produce CO2 and water. The process is cyclic because the carbon dioxide is then available to produce new biomass. Typical biomass resources include ? The forest ? Waste from wood processing industry ? Agricultural waste ? Urban wood waste ? Wastewater & landfill ? Other natural resources (straw, peat, bagasse, etc.) Unlike any other energy resource, using biomass to produce energy is often a way to dispose of biomass waste materials that otherwise would create environmental risks. Today, there are ranges of biomass utilization technologies that produce useful energy from biomass. Direct Combustion Gasification Anaerobic Digestion Methanol & Ethanol Production There are a number of challenges that inhibit the development of biomass energy. In this regard, formulation of sustainable energy policy and strategies in addressing these challenges is indeed a pre-requisite for the development and promotion of biomass energy. Rapid rate at which fossil and residual fuels are releasing CO2 into the atmosphere has raised international concern and has spurred intensive efforts to develop alternative, renewable, sources of primary energy. Biomass as the solar energy stored in chemical form in plant and animal materials is among the most precious and most promising alternative fuels not only for power generation but also for other industrial and domestic applications on earth. It provides not only food but also energy, building materials, paper, fabrics, medicines and chemicals. Biomass has been used for energy purposes ever since man discovered fire. It is important to say, that biomass absorbs the same amount of CO2 in growing that it releases when burned as a fuel in any form. This means that biomass contribution to global warming is zero. In addition, biomass fuels contain negligible amount of sulphur, so their contribution to acid rain is minimal. Over millions of years, natural processes in the earth transformed organic matter into today's fossil fuels: oil, natural gas and coal. In contrast, biomass fuels come from organic matter in trees, agricultural crops and other living plant material. CO2 from the atmosphere and water from the earth are combined in the photosynthetic process to produce carbohydrates that form the building blocks of biomass. The solar energy that drives photosynthesis is stored in the chemical bonds of the structural components of biomass. If we burn biomass efficiently, oxygen from the atmosphere combines with the carbon in plants no produces CO2 and water. The process is cyclic because the carbon dioxide is then available to produce new biomass. Typical biomass resources include: The forest residues from logging operations and other forest wooden waste Waste from wood processing industry sawdust, cut-offs, bark, etc. Agricultural waste palm oil residues, rice husks, sugarcane, coconut shells, coffee & cocoa husks, cotton & maize residues, etc. Organic waste animal manure, food processing wastes. Urban wood waste wooden pallets, packing material, etc. Wastewater & landfill Municipal sewage, landfill gas, etc. Other natural resources Straw, peat, bagasse Fossil fuels are not renewable. The oil, natural gas and coal we use today are gone forever. However, biomass fuels are renewable because the growth of new plants and trees replenishes the supply. Unlike any other energy resource, using biomass to produce energy is often a way to dispose of biomass waste materials that otherwise would create environmental risks. In this paper the following biomass utilization technologies that produce useful energy from biomass are compared: Direct Combustion Gasification Anaerobic Digestion Methanol & Ethanol Production For better illustration the following diagram (Figure 1) shows biomass energy consumption in selected Asian countries. Figure 1 Biomass consumption in selected Asian countries. There are a number of challenges that inhibit the development of biomass energy. In this regard, formulation of sustainable energy policy and strategies in addressing these challenges is indeed a pre-requisite for the development and promotion of biomass energy.

Ten-point action plan for reducing barriers to distributed generation A. Reduce technical barriers (1) Adopt uniform technical standards for interconnecting distributed power to the grid. (2) Adopt testing and certification procedures for interconnection equipment. (3) Accelerate development of distributed power control technology and systems. B. Reduce business practice barriers (4) Adopt standard commercial practices for any required utility review of interconnection. (5) Establish standard business terms for interconnection agreements. (6) Develop tools for utilities to assess the value and impact of distributed power at any point on the grid. C. Reduce regulatory barriers (7) Develop new regulatory principles compatible with distributed power choices in both competitive and utility markets. (8) Adopt regulatory tariffs and utility incentives to fit the new distributed power model. (9) Establish expedited dispute resolution processes for distributed generation project proposals. (10) Define the conditions necessary for a right to interconnect. The production of electrical energy from a customer s site has significant economic effects on the transmission and distribution systems of the electric utility provider. Small drop-and-run power plants such as micro turbines, fuel cells, solar, wind, reciprocating engines, and gas turbines can provide substantial additional power to meet the provider s peak loads. The hurdles to DG continue to be the resolution of important policy issues including interconnection interfaces, standby charges, and stranded costs, sitting and permitting for the DG. The main technical interconnection question today is how to interface DG energy resources with existing electric power systems in a reliable, safe, and cost-effective manner. Figure 1 illustrates the complexity and the interaction between DG and the interconnected electric power system. The four areas are as follows: 1. Isolated, no grid source 2. Isolated with automatic transfer 3. Grid interconnection, no power export 4. Grid interconnection, bi-directional power flow Figure 1. Complexity and interaction between DG and interconnected electric power system Figure 2 .is a typical single line diagram of an interconnection. The interconnection concerns from the electric utility point of view, as illustrated by recent surveys, include the reliability of the existing grid, the safety of electric power system personnel, and quality control. The key to achieving a working implementation of DG will be the introduction of universal technical standards that permit standardized grid interconnection while maintaining power system stability and worker safety. In the winter of 1999, the Institute of Electrical and Electronic Engineers (IEEE) began devising a universal interconnection standard, currently called IEEE P1547. Its purpose is to set forth a uniform standard for interconnection of distributed resources 10 Mva or smaller with electric power systems. The requirements relevant to performance, operation, testing, safety, and maintenance of the interconnection are also included in the emerging standard. PURPOSE A typical interconnection standard for DG establishes the criteria and requirements for the interconnection of distributed resources with distribution systems. It may conform to the emerging IEEE P1547 interconnection Standard, now a work in progress and close to completion. Specifically this document describes the design and testing requirements of generator interconnection to the electric utility distribution system. The requirements established in this document cover a broad spectrum of interests. The addition of a distributed resource to the distribution system may change the system and its response. Attaining a technically sound and robust interconnection among distributed resources and the distribution system mandates diligence on the part of everyone involved in the inter-connection, including designers, manufacturers, users, owners, and operators of both electric power systems as part of the interconnection requirements. This requirement needs to be understood cooperatively among the aforementioned groups and met. LIMITATIONS The criteria and requirements are applicable to all distributed resource technologies and to the primary and secondary voltages of the electric Power systems. Installation of DGs on the radial primary and secondary electric power systems is the main emphasis of the IEEE. The requirements may be met at the Point of Common Coupling (PCC), although the location of protective devices may not be at the PCC. GENERAL INTERCONNECTION REQUIREMENTS When a customer desires to establish a parallel interconnection with the utility, there are formal procedures to follow that will ensure a sound technical basis for the proposed interconnection these technical and application procedures are summarized in the following table. 1. Planning for the interconnection asset 2. Designing the interconnection asset 3. Constructing the interconnection asset according to the planning and design drawings agreed to during the application phase of the project. 4. Verification testing and commissioning testing of the completed construction phase. 5. Initial operation of the parallel interconnection, operations training, and recording the performance of the interconnection system. 6. Operation and maintenance of the interconnection asset for the life of the asset. Any customer may operate 60 Hertz, three phase or single phase generating equipment in parallel with an electric utility system in accordance with the utility s interconnection and operating agreement, provided the equipment of the customer meets or exceeds the requirements of the utility.

electronicsjunction

Thursday, February 5, 2009

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