Electric Scooters For The Mobility Impaired

A serious illness or injury which limits a person’s power of mobility can have serious detrimental effects upon both the individual whose mobility has suffered and the family of the individual. Thanks to advancements in the technologies of mobility, however, these injuries no longer mean an individual is destined to spend most of their days indoors.

One major development in mobility technology is the advancement of the electric scooter.

Scooters are ideal for elderly people, who still have reasonable mobility around the house or on very short walks but who find shopping trips or walks over more than a block unmanageable.

There are three major types of electric scooter: the travel scooter, the mid-size scooter, and the outdoor scooter.

The travel scooter sounds like it would be the most advance of the three, but in fact it is intended for lighter use. The travel scooter comes in three- or four-wheel designs, and is meant for indoor use or outside on hard, smooth surfaces. The small wheels on the travel scooter are ideal for maneuverability in enclosed spaces, around furniture and other items around the house. They are usually designed to be collapsible for easy vehicular transportation, and generally have a low battery capacity as they are not meant for longer excursions.

The mid-size scooter and the outdoor scooter are considered to be “daily use” scooters. They are for individuals who enjoy doing their own shopping and longer excursions.

The mid-size scooter is available in three- or four-wheel models, and has a large wheel size that is suitable for use outside. The maneuverability is not as fine as with the travel scooter, but still allows for good use in coffee shops, stores, restaurants, and malls. Mid-size scooters are not made to be dismantled, so a van or truck is needed in order to move the scooter from one location to another. Mid-size scooters can come with a large variety of options, including power seats, headlights, turn signals, and suspension.

The outdoors scooter is the SUV of the scooter family. These scooters are for individuals who are highly committed to large amounts of time outdoors over al kinds of terrain and will not be held back by their limited mobility. They outdoor models usually come with four wheels, in order to gain maximum stability on rough terrain, but three-wheel models are available. A larger battery allows the scooter to be used for longer distances and time periods, and the outdoor model scooter can also come with suspension and light packages. The outdoor scooter is not very maneuverable indoors, and it also requires a large vehicle equipped with a lift to transport.

Features and Benefits of DLP TVs

Even today, Texas Instruments remains the primary manufacturer of this technology. Many different manufacturers license the technology from Texas Instruments, and build their products around the TI chipset. In addition to its use in televisions and projectors, DLP technology is used in a number of specialized applications such as lithography and imaging.

DLP technology differs from other video technology in that it utilizes a small digital micromirror device (DMD) to tilt more than 1.3 million of these tiny mirrors, each of them smaller than the width of a human hair either toward or away from the light source contained within the DLP device. This process creates the dark and light pixels which appear on the projection screen.

The light is then filtered through a color wheel rotating at 120 times per second, to produce a technology that is capable of producing some 1024 different shades of gray. It is this gradation of color that really makes DLP technology stand out, and these gradations of color are achieved using color filters which are backlit using just the right intensity of pure white light.

There are four major components to the DLP system:

The DMD chip, which controls the mirrors
The color wheel
The light source and
The optics
In order to produce the picture, the light from the lamp passes through the color wheel filter and into the DMD chip, which then switches its mirrors on or off according to the color which is reflecting off of them.

This digital light processing, or DLP, technology is rapidly becoming a major player in the world of the rear projection TV, and more than two million of these TVs have been sold. More than 50 manufacturers sell at least one model of DLP based television, and as of 2004 the DLP TV had achieved a 10% market share. In addition, small standalone units, known in the business as front projectors, have become popular items both in the world of business presentations and in the world of home theater.

Advantages of DLP Technology

There are a number of important advantages to television sets that use DLP technology to produce their displays. Some of these advantages include:

Images that are smooth and free of jitter
No possibility of screen burn in
Good contrast
Good depth of color
In addition, DLP rear projection televisions are generally smaller, thinner and lighter in weight than traditional CRT televisions of similar size. Another potential advantage of the new DLP technology is that the light source is replaceable, which may be able to provide a longer lifespan than either traditional CRT or new plasma screen displays. The light source of the DLP unit is much easier to replace than that in an LCD model, and many models of DLP television feature light sources that are easily changed by the end user. Of course no one wants to replace the light source before its time, and the newest LED light sources on the market, introduced in April of 2006, have been shown to last 20,000 hours before needing to be replaced.

Disadvantages of DLP Technology

Of course there are some disadvantages to DLP television technology as well, and it is important for those in the market for a new TV to be aware of these potential pitfalls. For instance, in some single chip DLP designs, viewers may be bothered by the so called “rainbow effect”, which affects how colors are displayed on the TV and perceived by the viewer.

In addition to this rainbow effect, some possible disadvantages of DLP technology include:

Not as thin or as sleek as LCD or plasma displays, even though the weight is comparable
Some models have noisy fans
The replacement bulbs can be quite expensive, ranging from $200 to as much as $500
Competing Technologies

The main competitor to DLP in the market for rear projection televisions is known as LCoS (liquid crystal on silicon). This technology creates its images by using a stationary mirror which is mounted on the surface of a chip, and then uses a liquid crystal matrix to control how much light is reflected to create the image. These competing standards are still being worked out, so it is important to shop carefully and to read lots of reviews before making a final purchase.

When shopping for a DLP television, it is important of course to learn as much as you can about the new technology, and it is just as important to shop around for the best possible price. When shopping for a new DLP TV, it is important to look carefully at the kind of tuner the unit uses. Many modern television sets are designed to be multisystem devices, meaning that not only are they capable of reading the NTSC signal used in North America and Japan, but they will also be able to deal with competing standards such as PAL and SECAM. This can be an important consideration, so it is important to make sure you understand these various formats and how they affect you as an end user.

It is important as well to look at the type of components that can be connected to the new DLP television. Most modern TVs are built to accept signals not only from cable TV and satellite TV boxes but from DVD players, VCRs, and even computers. The presence of a VGA or DVI connection will allow the unit to function as a computer monitor as well as a television, but it is important to use caution when using any kind of rear projection TV for this purpose. While plasma TVs can often make excellent computer monitors, technologies like DLP may struggle to provide the depth and resolution that computer users are used to.

Even though the prices of televisions in general, and DLP televisions in particular, have become a lot more affordable in recent years, these TVs are still major purchases, and it makes sense to give that purchase the consideration it deserves. As with any purchase, shopping around carefully will help you get not only the lowest price but the best overall value as well.

The Basic Starting Point In Selecting A New Comforter Set

There are literally thousands of options available in comforter set designs. However, there are several critical issues that one must consider in order to make the best choice possible when picking out a comforter set. Many comforter sets, quite frankly, can be a bit of an investment for your home. That is why it so important to do your homework and make your selections based upon multiple factors, not just one or two.

It is after numerous hours of dedicated research and careful consideration, that the average consumer will understand their options well enough to make a solid product purchase decision. Hopefully, as you conclude reading this article, you will have a much better idea as to which direction you would like to go in selecting a new comforter set for your bedroom.

A comforter set can mean many things to different people. There are some sets, which come only with the comforter, while others will include the complete “bed in a bag.” If you know up front what accessories you wish to get with your comforter set and the budget you have to spend on your bedding, it will help you reach the end of the process in a more satisfactory purchase decision.

Bed comforter sets can run the gamut of styles and pricing, ranging anywhere from a hundred dollars to thousands. This is why it is so important to understand how much you are willing to spend before you engage the shopping process. Once you understand your spending limits, then you are better prepared to determine whether you might just want a comforter, a bed in a bag package, or the full meal deal with pillow shams, canopy covers, dust ruffles, additional sheet sets, etc. If your budget is not a major concern, you may even opt to have a comforter set custom made just for you.

Once you have determined how much you are willing to spend on a comforter set, now it is time to get down to the nitty-gritty of picking one out.

One of the primary questions to answer, after you have set your budget, is how many bedding accessories do you want to purchase with your comforter? Many bedding manufacturers will offer items such as a matching dust ruffle, coordinating pillow sham, sheet sets, even window treatments. Depending upon the name brand of the product, many bed comforter sets can also be found with additional elements that the average consumer may not have even considered, such as wallpaper, borders, and coordinating bathroom decorations. Many of the comforter sets available today provide so many more options, which are designed as companion products to be sold with the comforter set.

Once a shopper understands how many and what accessories they want to get with their comforter set, they need to determine what types of materials they want to pursue in their bedding products. Polyester, cotton, and silk are the primary fabrics used to enclose the comforter package. On the inside of the comforter, polyester fibers, cotton, wool and down are often used as a stuffing material. Each kind of material, at each level of the comforter’s design, has its positives and negatives to consider.

It is important to understand in advance what fabrics you would like your comforter and bedding to be made from, because, depending on the individual, there are some fabrics that the consumer will want to avoid at all costs. For example if you want to stay within a reasonable price frame, then choose fabrics such as cotton or polyester synthetic blends. There are multiple comforter sets available in these fabrics, which tend to be reasonably priced with various design options. If money is no issue you may want to go the route of a silk comforter set. Lightweight yet warm, this may be a great choice for you if you have no fears of breaking the bank.

Wool filled comforters can be a wise choice in a comforter set if you are allergy-prone and desire a natural product. These, however, can get very warm so you should know your internal thermometer well, before choosing this kind of comforter. Additionally, a down-filled comforter can make for a great comforter set that offers plenty of warmth on those cold, winter nights, but down-filled products can create havoc for those who are prone to allergies. Many people like the down-filled option, since it typically offers product choices that range from lightweight to heavy, and the new baffle box stitching keeps the down product from shifting like it did in the comforters of old.

You should also consider your individual style when it comes to making a comforter set selection. After all, the design and styling of a comforter set speak to the personality and taste of its owners. There are numerous choices that one now has when choosing styles, colors, and patterns. Determine which color palette works best with your individual tastes and start there. Decide if you would like to see this palette in solids or if patterns are a better fit with your taste. Also know which patterns and styles work with your fabric choices and this will further help in the decision making process.

Choosing the right comforter set for you can be a challenge, but it can be made just a bit easier when you follow the above guidelines. If you do that, you will be able to turn your humdrum bedroom into one of luxury and bliss with your new comforter set, suitably tailored to meet your own unique individuality.

Electric Linear Actuators – The Rotary Motion Producer

Mechanical energy is an area of science that is making strides every day. The study of how actuators produce mechanical motion by converting various forms of energy into mechanical energy is a source of great exploration. Science finds new ways to make use of actuators every day including for medical purposes. Many scientists believe that the more they study these seemingly simple machines, the more they will discover ways of helping mankind.

The way in which a linear actuator works is that there is a motor that rotates a drive screw using a synchronous timing belt drive. Some linear actuators can also use a worm gear drive or direct drive. Which ever the choice, the turning of the screw pushes a drive nut along the screw, which in turn pushes the rod out and the rotating the screw in the opposite direction will retract the rod. According to the Association of Sciences, the drive screw is either an ACME or ball thread or is belt-driven which is what gives the machine its motion. A cover tube protects the screw nut from environmental elements and contamination thus allowing for the machines use continually without the chance of it getting gummed up. Radial thrust bearings permit the screw to rotate freely under loaded conditions and gives the linear actuator its strength.

Linear actuators usually serve as part of motion control systems. These days most are run by computers. Control systems, a device that you find linear actuators in, move or control objects. This is made possible by the actuators.

There are various forms of energy that run actuators. These forms of energy include, hydraulic, pneumatic, mechanical and electrical. Linear actuators are used a lot in robotics and factory automation.

Linear motion is when an object moves in a straight line. This is the basic concept that drives the linear actuator. One has to stop and consider when choosing a linear actuator which type they need to fit the purpose of their project. Some things to keep in mind are the speed, stroke length and load rating of the actuator. Programmability of the actuator is also a factor especially when the application will be one that requires specialized detail. A linear actuator can be used in just about any forum. Ask yourself some questions when attempting to choose the right one for your project such as are there particular safety mechanisms required, environmental concerns to be addressed or space issues?

The First Wrist Watches

As with many fashion trends in times gone by, the wrist watch was first made fashionable by royalty — specifically Queen Elizabeth I who was given one in the late 1500s. It was an adaptation of the pocket watch made more feminine and worn as an adornment accessory.

The very first widely worn wristwatches were designed exclusively for women and called wristlets. Men of the late 19th century and early 20th century still kept track of time using a pocket watch. They considered the wristlet a fashion trend that would, like all others, come and go; and the wristwatch would at that time never be considered by men as anything but a feminine bobble for women.

The wristwatch as a useful way to conveniently keep time for men actually started out as a wartime necessity. The British army in their fight against South Africa in the Boar War in the early 1900s strapped pocket watches to their wrist so that they could hold their weapons and still synchronize maneuvers with other troops. The first wristwatches for men were promoted to the military for men going into active service. Many of these influential men found the convenience of not fishing in a pocket for their watch indispensable even after returning from the field.

Changes in watchbands also added to the popularity of the wristwatch for both men and women. The flexible band pieces that attached to the open-faced watch made it easy to fasten a leather strap, which kept the watch securely, attached to the wrist. Now wristwatches were standard military issue for the allied troops of World War I.

In 1915, The Rolex Watch Company, formerly known as Wilsdorf & Davis, was founded. Hans Wilsdorf liked the idea of a wristwatch for both men and women and worked to improve the accuracy. Rolex was recognized as a leader in this research and received the first wristwatch Chronometer award given out by the School of Horology in Bienne.

In the mid-1920s, following the war, men started to associate wristwatches with the brave heroes who fought and no longer viewed them as only for women. Rolex seized upon this new image and continued through the 1950s to market watches specifically to men. Professional, masculine-style watches were developed to be worn by men in various fields of work.

The development of new technology capable of tracking time and performing the other functions of a cell phone or planner may lead to a time when the watch will be less of an important way to keep time and more of fashion accessory or status symbol. But, let’s face it, if anyone ever asks you if you know the time, your first instinct is to raise your wrist, whether or not you remembered to put on your watch!