Archive for the ‘science and technology’ Category

Having Fun With Green Lasers

Friday, August 22nd, 2008
by Richard West

Every good geek has played around with a laser pointer that has a red beam. You might have used one for work, to highlight and gesture when giving a PowerPoint talk. And to tease your cat or dog, make fun of your friends by planting a red dot in their forehead, and lots more fun things.

But, let’s face it! What’s the point of owning a red laser pointer when everyone not only can have one, but they actually do? Even your grandmother has one, and she doesn’t even “do” PowerPoint. So how do you rise to be top geek and impress your friends, furry or otherwise?

Now, take a look at the new green laser pointers. And I’m not talking about that other kind of “green” where everyone is recycling their old newspapers. I’m talking about a cool new laser pointer that uses the far more powerful 532 nm wavelength; which, as any geek worth “his or her salt” knows, is tons better than the old 650 nm wavelength used by the red laser point. And, best of all, all that extra wavelength means it’s really truly green.

Green goes further and shines brighter than red, meaning that it can highlight objects from a greater distance. Instead of just pointing the beam on your friend across the room or the PowerPoint slide behind you, you can now direct the green beam on clouds and constellations in the sky. It’s so powerful and bright that it’s even visible outside in the sunlight.

This equipment is so strong that it could actually get you arrested! Yes, arrested. Pointing a green laser beam at an aircraft could have the FBI on your case, wondering if you’re planning possible terrorist operations from your backyard. Pretty neat, huh? Your old dinky red pointer can’t do that.

And the green laser pointer doesn’t produce just a wee little spot. You can see the whole beam as it travels to the stars. Think Luke and his light saber. See the possibilities?

A green laser pointer is at a whole separate plane from the old-style red laser pointer. For a true green, a pointer needs a green direct injection laser diode. These diodes could be potentially dangerous if handled by the public at large, so they’re not even available wholesale. So this complicated process follows to keep hazardous material out of peoples’ hands. (And only the geeks in the room will understand a word of it.)

The green laser pointers, available on the market today, all use Diode Pumped Solid State Frequency Doubled technology, aka DPSSFD, which is good news for everyone. Basically, this means that an infrared laser diode pumps out 808 nm, which is then altered to 1,064 nm, which is then shot into a crystal that doubles the frequency to produce the green beam at 532 nm. (It should go without saying, because only card-carrying geeks are reading this, which with frequency smaller numbers mean stronger.)

For all these reasons, green laser pointers are the cool new technological gadget that all your techie friends will love. They were actually created in 2000, but outside highly technical fields they’re still virtually unknown. Be prepared to pay a heftier price, though. Red pointers cost less than $10, but a new green laser pointer can be as much as $50. But it will be worth every penny. How could you resist such a powerful new device? We know you want one.

About the Author:

Choosing the Best Broadband for your Internet Connection

Friday, August 22nd, 2008
by Joplin DeMazzier

So you?re in the market for getting a broadband connection and are a bit confused on which to choose. Whether you?re upgrading from a slow dial-up connection or are new the Internet as a whole, going with broadband is definitely the way to go.

The main choices the typical consumer has are DSL, cable, and fiber optic broadband service. The three have different speeds and prices, and their level of access to you can depend on location. But, they all do offer a great boost over the connection speeds one would see with dial up service.

DSL is basic broadband available to most households, as it is provided by your telephone company. If you’re not close to the telephone company service station, you might not be able to get it. The price is low, usually from $15 to $30 per month, and is perfect for the consumer looking to have cheap access to broadband.

Cable, which is run by your local cable provider, is the middle tier of broadband connectivity. Prices range from $25 - $500 per month (higher prices for commercial/business services) but allow for increased bandwidth compared to DSL.

Cable broadband does have wider availability, however, as you can get it if you can also get cable in your home. This service is perfect for those with multiple internet users in their home, or those looking to play games or music online.

For the technologically advanced user, and the user seeking the best in connectivity, fiber optic technology is the best way to go. Many areas of the country do not have fiber optic connections, but for those who do, services like Verizon’s FiOS can provide you with the best connection available.

Bandwidth is by the far the greatest of the three, and there is more potential for network growth. Prices range from $30 - $200 depending on the package you choose. For those people with 3+ computers and are highly ?connected?, run websites, or upload/download a lot of content, this is your best choice.

Before you choose a broadband provider, establish what you want to spend and your needs for service, and then shop around with your local carriers. Also, be aware of some carriers who can save you money on multiple services if you bundle the broadband with telephone and television service.

About the Author:

Cheaply Build Your Own Windmill Power Generator for your Home

Thursday, August 21st, 2008
by Matthew Loop

We live in an exciting time and a technologically advanced society. Alternative power / energy options for homeowners are on the up-and-up, similar to the price of traditional energy. Did you know that you can easily build your own home-made windmill? These are sometimes referred to as a wind generators and they enable you to create your own energy absolutely free.

The market price for the wind generator may range between a few thousand bucks, which is indeed rather expensive. Instead, you can build a windmill on your own and this just at the expense of less than $99 and can generate power up to 1000 watts. In such expensive times, everyone wants to have an alternative that may save few bucks spent on energy.

The most popular windmills are the Do-it-yourself windmills made by Earth 4 Energy. These windmills are also popular in areas, which have a velocity of wind less than 5-7mph. Throughout the year, enjoy free electricity from these windmills. Create your own electricity to enjoy it. In addition, the profit is, you can power computers, nighttime lighting, electronic equipments, and emergency lights too.

The fact is that the wind has a tremendous amount of energy and the amazing part of the scheme is that power is directly proportional to the cube of speed. This implies that if the speed of wind is multiplied by 2, you are increasing the power generation 4 times more. You may find more than enough Earth 4 Energy guidebooks and instructions for constructing a wind generator but the following points listed below should be considered prior to that:

a) The wind device should produce over 1000 watts of electrical power.

2. The blueprint of the homemade windmill is easy to read and follow.

The windmill should be strong and steady to withstand natural calamities

d) Beware of copycats of other wind generation devices.

The windmills should be easy to create and assemble

The price should not exceed $99

If you keep in mind all these criteria, the Earth 4 Energy windmill power will be created very easily and conveniently. Your project should be successfully created and save a lot of money. A number of people should envy your windmill. What more could you want?

Considering aforementioned guidelines, you would be able to complete the construction of your Earth 4 Energy wind generator in a rather short time conveniently and create your own electricity. Besides your neighbors will eye you from the corners as you will be saving a huge sum of dollars with this easy to build windmill.

About the Author:

General Information About Air Horns and Air Horn Kits

Tuesday, August 19th, 2008
by Chris Channing

In the past century train horns have evolved from being a simple horn, to elaborate horns with many nozzles. They serve as extremely loud devices to warn oncoming traffic and animals of the trains presence. Train horns can also serve as a signal transmitter, when conductors and employees need to pass signals between each other. A train horn consists of several pieces, but the main components are the nozzle and the diaphragm.

Train horns function by using compressed air, on a scale from 125-140 pounds per square inch. Oscillation is the flow of air throughout the horn, and helps to produce the sound that we hear. Air application to the horn results in a vibration and waves of air flow outwards creating a loud whistling noise. The shape, and size determine the frequency and pitch of the horns noise. When train horns were first invented they were operated by using a pull cord or lever. Currently train horns are used by simple pressing a button. Train horns are not used solely for trains, in recent times they have become popular for use on trucks, SUVs, and other large vehicles. Many people use them on water craft for warning signals as well. Some people even collect them for their sentimental value, and their beauty. Suburban areas have banned uses of train horns in certain areas. They tend to disrupt quiet areas and anger the local citizens.

Train Horn kits are popular amongst train horn enthusiasts, and can be purchased on the internet, or in specialty shops. While they look like a kids toy, these “big kid” toys do not come cheap. Many are priced in the $300 range, while a great portion of them exceed $400, and even $500.

Setting up a train horn is a complicated process, and also requires a bit of precision. Importance is placed upon choosing the correct air compressor to generate the sound, and the right placement. A mistake in any of these categories can be lethal, and is highly dangerous. It is advisable to have an air compressor of 20 gallons or higher. This allows for a surplus, and keeps you from running back and forth to a gas station to fill it up.

Personal train horns, and horns used on trains are bound to have functionality conflicts. Since the two main pieces are hollow, they make great homes for small creatures and insects. This interference will greatly impact the sound that is produced from your horn. While regular maintenance is necessary, it is also advisable to get your train horn repaired at a professional place if necessary. Collectible horns and everyday use horns have different repair and maintenance requirements, so make sure you know what you are doing before attempting anything on your own. For a fee you can see an antique dealer, or a professional train horn tuner to get your horn in perfect shape again.

Closing Comments

All in all, train horns are a unique collectible item, and a quite functional one at that. In over 50 years they still have not gone out of style, and train conductors will probably continue to use them for some time.

About the Author:

Earth 4 Energy - Cheap DIY Solar and Windmill Power

Tuesday, August 19th, 2008
by Matthew Loop

In today’s society, saving money anywhere you can is important to middle-class America. Many are sick and tired of forking out high costs for their electricity, power, and gas each month. Herds of people are now turning to the Earth 4 Energy system and it has struck a curious nerve with others.

For many, the process of generating power through windmills and solar panels sounded very interesting. Even for me the process was quiet interesting and cool. I even bought a conversion kit to implement the same in my own residence. The result was that I created my own windmill and then produced electricity out of it.

For a very nonprofessional, the most evident question would be what is the benefit of using solar panels and windmill power? The best answer to this question is that your cost of utilities would decrease to a huge amount. The Earth 4 Energy kit is of great help and saves thousands of dollars per month.

The best part of these generators is that they are environment friendly and pollution free. They do not emit harmful pollutants in the air. In the near future almost all the people will use this concept in order to save money and generate power in an effective way.

An added benefit that a bunch of users like myself experience is that the in-town utility company purchases the excess electricity generated from our homes. This applies if we use less electricity that what has been created. This situation is not a rarity. Believe it or not, it can occur frequently if you live in an area where the windmill or solar panel can generate massive amounts of electricity in excess.

Now that you have understood the benefits of the Earth 4 Energy protocol, you know that wind / solar energy is one of the cheapest resources of energy available in the electricity front.

You know something else, it has also helped other people who live in rural areas with no power lines. They power their homes with electricity generated from the wind turbines.

Therefore, the fact of the whole story is that you are getting electricity efficiently and in the most inexpensive way. This and some more innovative technological ideas are required to fight back the conditions of gas and oil prices. No more being a victim to the hike in prices, use innovative ideas and construct easy means for you.

About the Author:

A Digital Camera - How To Make The Right Buying Choice!

Monday, August 18th, 2008
by Vincent Manga

If you want to purchase a digital camera, you really must have at least some idea of what you need to look out for and avoid. You don’t have to be an expert, but you must at least know some basics to make sure you don’t end up with an inadequate camera for your digital photography. The following is a series of things you need to understand and look out for, there there is less plus several things you must avoid.

1. megapixels:

With the exception of the high-end professional digital cameras of 12 plus megapixels, the number of megapixels a digital camera is capable of generally speaking is the most important quality factor when it comes to how good your digital photos will come out. In the case of the high-end digital cameras the lenses themselves will also play a very important part.

When comparing digital cameras by the number of megapixels they are capable of, you will need to look closely at the small print on the digital camera or in the digital cameras manual. You may find that the camera is in reality capable of less megapixels then it leads you to believe.

What many digital camera manufacturers do is to print on the camera or in their manuals say six megapixels in big writing, but underneath there’s writing where they will put something like five megapixels enhanced to six using software. If the camera states something along these lines the camera is not truly six megapixels at all. If the camera has to use software to enhance its number of megapixels it will not be as good as a true six megapixel camera.

How much zoom do you need?

You’re going to have to decide just how much zoom your camera will need, for this think about the type of photography you want to take with the camera, if a lot of long-distance photos are going to be taken, obviously more zoom will be very useful.

There are two kinds of zoom, optical and digital. Optical zoom zooms in using lenses within the camera, so there will be no quality lost. Where as digital zoom on the other hand will simply make your pictures bigger and so will lose you are lot of picture quality.

Many digital cameras here too can be misleading since they will often state the maximum digital zoom in big letters on the camera without actually stating that it is in fact digital zoom, they will of course tell you that it is digital zoom so as to cover themselves legally but again only with very small print nearby.

In my opinion digital zoom is about as useful as mud, I’d much rather not use digital zoom and instead digitally enlarged the picture at home on my PC. This way I would be able to see exactly how much picture quality I would be losing and I would still have the original picture at full quality.

3. Powersupply

Many people don’t stop to think about the powersupply of the digital camera they are thinking about buying, but I’m sure you can agree that the last thing you want to happen while you’re out and about taking your pictures is that you suddenly ran out of power and can no longer take any more.

With the lower end cheaper more commercial digital cameras AA and AAA rechargeable batteries are quite common. In recent years these batteries have come down considerably in price so this isn’t such a bad thing. You just have to remember to keep several sets charged and ready to go at all times.

Specially made lithium battery packs are normally used in the higher end digital cameras. Because of the fact these battery packs are specifically made for the cameras in question they are also normally considerably more expensive.

Since these batteries are normally somewhat more expensive you will also want to take this into account when comparing price on each different camera model. You do normally get the added advantage of a longer period of usage of the digital camera when using these battery packs.

Some digital cameras can take both normal batteries and their own specific battery pack. This could, as I’m sure you can imagine, be a pretty cool feature since it will give you full control.

If you take into account everything mentioned above when you compare digital cameras, you should have no problem in choosing a good camera for your usage. Also remember to check out on-line reviews as they will help you compare each camera.

This is especially important if you are buying a high-end digital camera, since as I have mentioned there are other factors such as the digital cameras lenses that will affect the quality of the pictures the digital camera takes.

About the Author:

Learning How To Use GPS Tracking Device

Monday, August 18th, 2008
by Andre Peter

A GPS tracking device or Global Positioning System tracking device has a multitude of uses from those benefitting the public to those for personal use. Discovering the various uses of the GPS tracking system and GPS tracking device can help you find the means to enable you to carry out errands so much more efficiently.

Most GPS tracking systems have software that can be downloaded from the Internet. Make the best use of free trials offered to find the software interface you like best. Different software designs have different specific functions so it is important for you to find one that suits your needs in order for you to enjoy benefitting from the use of GPS tracking system and GPS tracking device.

GPS devices are commonly used for vehicle navigation. With this piece of technology fitted to your car, you won’t have to worry about getting lost or caught in traffic again. Benefitting from the use of GPS tracking system and GPS tracking device is advantageous if you understand that these units can easily be fitted not just into vehicles but cell phones, watches, computers and more.

Businesses have discovered some of the best uses of the GPS tracking system and GPS tracking device. Companies that use delivery vehicles, taxi companies and other similar businesses benefit from GPS because they not only provide real-time monitoring of their fleet of vehicles but also because they enable companies to dispatch their vehicles in a more efficient and timely manner.

With a GPS tracking system, companies are able to protect their vehicles from theft by knowing their exact locations at all times. Vehicles are less likely to get lost, cutting down on time wastage and if stolen, can easily be tracked within minutes.

For concerned parents, finding the best uses of the GPS tracking system and GPS tracking device could include fitting a cell phone, wristwatch or backpack worn by your child with a system. This will enable you to monitor the whereabouts of your children and give you peace of mind when they are out without you.

A GPS tracking device can also be used on teenagers who drive. By installing a GPS tracking system to the car they drive and downloading the GPS software into your child’s mobile phone, you can track your teenagers while giving them their freedom and independence at the same time.

Other uses of the GPS tracking system have found their way into the police departments where they have used this device to track criminals and solve crimes. Emergency 911 operators have also found the GPS tracking device very useful as it has helped locate where callers in distress are.

The benefits and uses of the GPS tracking system and GPS tracking device are many and varied. With the advent of modern technology, the accuracy of information provided by these units is impeccable. Efficiency and peace of mind are just some of the things you could enjoy from GPS tracking.

About the Author:

Home Office Design: Secrets to Exceptional Home Office Design

Monday, August 18th, 2008
by KC Kudra

Setting up a home office is one of the most important tasks you will face when you make the decision to work from your own home. Your home office can be a corner of your kitchen or living room or, if space permits, a former spare bedroom.

Size is less important that functionality. When deciding on where to set up the nerve center of your business, there are some factors you need to consider.

Is the area well lit?

Having the correct lighting is very important when setting up a home office. Eyestrain and eye problems can result if you spend long periods of time in a dimly lit room staring at papers or a computer screen. In order to avoid eventual vision problems, you will want to have a well-lit home office.

Are there plenty of electrical outlets?

Take into consideration what appliances you will have in your workspace. Your computer system will require an outlet for your CPU, monitor, scanner, printer, speakers (sometimes), and other ancillary equipment you may have.

Is There Enough Ventilation?

Computer equipment needs to “breath”. Having proper ventilation will allow your computer to run longer and last longer. It must be cool in the summer and warm in the winter. Likewise, you will operate more efficiently and effectively if you are comfortable, so looking at the ventilation is a must. Also, check out the amount of dust in the area. Computers and people work less well when the dust levels are high.

Telephone Access Is another Consideration

Depending on your Internet access, you will need either one or two telephone lines in your home office. If you are on dial-up, you will need two phone lines - one for the computer and one for you to talk on. It is also much easier to track your telephone usage if you separate your personal phone line from your business telephone line.

Having separate telephone lines in your home office is important because you don’t want to be online if a client is trying to reach you. Make sure that this separate line is set up to receive phone calls while you are online. If you have broadband, one phone line will suffice. These things need to be considered prior to opening your door for business.

What Type Of Internet Access Do You Have?

Now a days the modern home office must not only have a telephone it is imperative it also has access to a high speed Internet connection. Depending on your service provider this may already be covered by telephone if you have DSL Internet.

If you already have a broadband connection, make sure you have access to the cable connection where you are located. If you choose to go with a wireless connection to your broadband access, be sure and secure and encrypt it with WPA encryption and not WEP. WEP encryption was hacked about 10 years ago, and if you are doing secure transactions online, spring for a wireless modem/router with the latest encryption available. Better still, you might want to stick with straight cabling for faster speed and safety.

If you take advantage of a nearby WiFi hotspot where you can go wireless, be sure and avoid making purchases or conducting unencrypted transactions while wireless on a public wireless connection. If you go wireless at home, make sure you have encrypted your connection and you should be just fine. With all of these decisions made, you will have the basics for starting the setup of your home office organization.

About the Author:

Accurate and Incredibly fast acting

Sunday, August 17th, 2008
by Donald K Aniston

A Sony Handycam HDR - FX1 can make the life of a professional videographer easier, thanks to the leader in electronics.

By purchasing a Handycam HDR - FX1, a professional videographer can have all of the great aspects of one of the very expensive camcorders, yet at half the cost.

All of the auto functions on this camcorder are very accurate and incredibly fast acting.

The Sony Handycam HDR - FX1 is one digital camcorder that will make any professional filmmaker excited about their job.

This is not just for the professional person who is looking to purchase a new camcorder. Because it is so easy to use and so up-to-date, a person can operate the advanced controls very simply.

It is not for everyone since it is very expensive. It is aimed towards those who are serious about making great films. This device is great for editing and it also helps to keep a person on the cutting edge of technology because of its ability to switch to high definition.

This is as good as it gets when it comes to automation. The average cost of this camcorder is around five thousand dollars. A person needs to be totally into the art of recording and editing film before they purchase this device. This camera is not for everyone, but those who do see the need for it can greatly benefit from all of the great functions.

About the Author:

Reasons Home Owners Are Flocking To Lakeside Homes

Sunday, August 17th, 2008
by Chris Channing

It is established by most that a lakeside home is too expensive to be afforded by most middle class families. This is just a myth, however, as lakeside homes have come down in price as the real estate market continues to be a buyer’s market. Nevertheless, lakeside homes will still not be the most affordable properties, yet they hold many benefits.

Most homes that reside by the lake are going to be more expensive simply because the lake is often a man-made lake. Lakes intentially created by real estate companies are expensive to create and maintain- and the expense is passed onto the buyers. In addition, the surrounding area is often renovated for a more appealing environment.

It is said that living by a scenic view will lower stress due to overall satisfaction of one’s environment. This is yet another reason why real estate surrounding lakes is so expensive- they often have much landscape work done to them to make the scene as jaw-dropping as possible. This is just another way real estate agents can mark up their profits on sold property.

Entertainment is never a problem when one lives by the lake- yet another benefit of choosing a lakeside home over less appealing town houses. Lake homes allow the home owners to swim, enjoy water sports, ice skate during colder seasons in some locations, and overall provide the perfect setting for picnics and family reunions. The entertainment value is almost worth the extended price tag alone.

While it isn’t always the most politically correct way to add up the benefits of a lakeside community, most will agree that the fact that there are more wealthy neighbors brings the fact that there is less crime on average. This has been proven in areas where inner-city life has more crime, which correlates to the data that a lesser per capita income promotes crime of certain nature.

Lake properties aren’t always a good decision for those with a poor credit score or a low income. If a lakeside home is still desired, there are ways to get the same benefits but at lesser costs. Finding lakeside homes that are situated in rural areas where there is less demand for them is one of the best routes to forego. If nothing else, taking out a loan with the help of a spouse can be a viable way to afford the extra expenses.

Final Thoughts

The Internet can be consulted from here on out for a complete listing of lakeside homes in your area. Most real estate brokers will have online listings of their clients, although it never hurts to pick up a newspaper or classifieds paper for more results to review.

About the Author: