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These days science is booming. Scientists are developing and honing procedures that were once difficult and risky and highly unreliable. Previously if a man had a vasectomy and then remarried or just changed his mind and wanted to have children he was basically out of luck. No longer is the idea of reversing a vasectomy a pipe dream. A man that wants to turn back the hands of time to before he had his vasectomy can undergo a vasectomy reversal. When the procedure of vasectomy reversal was first developed the procedure was a lot more hit and miss, with a whole lot of misses. Nowadays the vasectomy reversal is a relatively successful procedure for a man to undergo. There are a few factors that contribute to the success rate of a vasectomy reversal so the more of these factors that are in line the higher the rate of success. No matter how high the success rate can climb there is never a 100% success rate and there are no guarantees that the vasectomy reversal will actually lead to the birth of a new child.

One pretty large factor of whether or not a vasectomy reversal will produce a child is the length of time since the man had his vasectomy. The shorter the window between the vasectomy and vasectomy reversal the more likely it is that the procedure will be effective. Though it is a good indicator the length of time is not a definite determining factor since there are men that have successful vasectomy reversals after decades of time has elapsed since their original vasectomy. Some other factors can be the length of vas deferens on the testicle side left over from the vasectomy and a small vas deferens gap are two of the many good indicators.

Consult with your doctor and allow them to run the necessary tests and conduct the necessary exams to determine the odds of your vasectomy reversal joining the ranks of successful child producing vasectomy reversals.

To learn more about vasectomy reversal or to understand what a vasectomy is, stop by http://www.fertilityandreproduction.com

Projector screens are generally divided into two types base on their functionalities: reflection projector screen and transmission projector screen. It can be also divided into soft and hard screen base on the materials they are made from.

Home theater generally uses soft reflection screen. My brother-in-law originally wanted to buy a 1000 (~$150) so-called "import screen", but a friend of his who sells projector screens told him that it is hard nowadays (in China) to distinguish the genuineness of an import screen, it is hard even for himself. Some of them that are labeled with 'import' or 'joint capital' were actually manufactured somewhere in the south of China. He felt that he'd rather to buy a 300 domestically manufactured screen with good feelings than buy this kind of "import screen". What this friend said makes perfect sense. But after doing some research, my brother-in-law found that all screens on the local market are made from high gain Bolivian bead that is used for projecting newspaper clips, they are simply not suitable for video frequency.

Theoretically speaking, a white wall with one smooth side actually is the best "screen". Because its gain is 1, meaning that the light projected can be completely reflected out, which is an ideal state of being "no absorption, no gain". Unfortunately, for the purpose of absorbing and proliferating the sound wave, he already made the wall a background wall with sound-absorbing material and plywood installed. making it impossible to serve as a "projector screen', he had to find another solution.

You might be wondering at this point: why do people still bother purchasing expensive screens if we can all use white walls?

Well, there are always benefits and advantages of using a professional screen: convenient, artistically beautiful and dignified, good screen can also make up the insufficiency of a projector and improve visual effect. Among the expensive screens, one type is "gray screen" (cost about 15,000, roughly $2000). This kind of screen probably was originally designed for liquid crystal projectors. The biggest problem with liquid crystal projector is that the color appears dark and grey, insufficiently calm. This is its "congenital defect" that is caused by its liquid crystal board and path of rays.

Regarding gray screen, we all know that gray is merely a lighter black, and black absorbs all visible light. Gray can only partially absorb visible light, it is like brightness of the picture is reduced. If you have used any picture processing software's "brightness / contrast gradient" option, you should certainly have noticed such phenomenon that reducing brightness is equivalent to increasing contrast gradient? Same concept, since the brightness has been reduced, it in turn increased its contrast gradient. The black effect gets improved due to the bigger contrast. We can also experience the same effect when we look out through the sunshade glass of our car. In fact, there are many ways to just reduce the brightness, you don't have to use gray screen. There are magazines recommending putting the light gray filter of a photographic camera to the projection lens, the principle is the same. You can even use more simpler method, namely you need to adjust the projector's output brightness or increase the contrast gradient. No need to spend a cent, you may achieve the similar effect, but the premise is that showroom must be dark enough.

Back to the bottom line, if a gray projector screen cost you $2000, definitely it is not just because the screen color is changed from white to gray. Speaking from the optical principle, I'm afraid there's a lot more behind. I'm guessing probably certain chemical compositions have been added to the material of the screen that changed the reflection or absorption intensity of different wavelength of light, thus changed the luster and the contrast gradient of the entire image, that, makes up the inborn flaw of liquid crystal board after all. In addition to this, what other tricks do you think they can play? It doesn't seem to be possible with the meager knowledge of physics that I have.

It sounds more like it to throw in a 150,000 screen if your projector cost you 15,000. But adding a 15,000 screen to a 15,000 projector doesn't make much sense at all. If I have to buy a 15,000 screen, then it would simply work better if I put the money together and buy a 30,000 higher level projector to achieve better effect without any extra effort. A 15,000 screen is a crazy price to my brother-in-law (imagine his monthly income is merely 3000). Also if he buys a name brand Japanese gray screen, then he actually spend most of the money to pay for the labor which he personally doesn't feel comfortable.

The ideal screen for the DLP projector that my brother-in-law purchased should be like a white wall, just let the project light reflected completely without any "reservation". He figured that he really didn't need such costly screen. So he finally decided to make one on his own.

Exactly how did he do it? You may not believe how simple and inexpensive it really was! He spent a bit over 10 (about $1.50) in a home decorating store on a self-adhesive pure white matted formica PVC panel with dim grains, cut the right size, pasted to his original background wall, that is it, flat and smooth! With such PVC screen, he doesn't need to worry about the 'curl-up' phenomenon that may occur to a regular projector screen after around 12 years of use, he also doesn't need to worry that it would turn yellow one day due to natural oxidation. But remember it requires some pasting techniques to make it work perfectly for you. The result? Great!

Here are couple of self-made projector screen photos from my brother-in-law as 'evidence':
www.news-blogs.com/_images/entertainment/diy_screen.jpg
www.news-blogs.com/_images/entertainment/diy_screen2.jpg

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The beautiful city of Vancouver is located in the Southwestern corner of British Columbia, Canada; on the coast of the Pacific Ocean. Being overlooked by the Coast Range Mountains and surrounded by water on three sides, the city has a landscape that truly takes your breath away.

The Greater Vancouver Regional District (GVRD) has everything from Beaches, mountains and 192 beautiful parks to a cosmopolitan downtown area, fabulous shopping and entertainment. Due to it's location it has a mild climate, which means not too much snow in the winter and pleasant temperatures in the summer, but it does to tend to have a lot of rain. The average annual rain and snow fall is 1219mm.

As Canada's third largest city, the downtown area has a population of 514,000 (1996 census) and the GVRD has a population of almost two million. It is a city of newcomers, according to the 1996 census 45 percent of residents were immigrants. According to international surveys, Vancouver is one of the best cities in the world for quality of life. It is also ranked, along with four other Canadian cities, as one of the safest cities in North America.

The Greater Vancouver Regional District comprises 21 separate municipalities each is home to several hundred thousand people and many were once cities in their own right before being swallowed up by the urban sprawl.

The actual city of Vancouver itself is made up of 23 different Neighborhoods - each having its own distinct character.There are many wonderful places to visit, shop and eat in. This includes a vast number of galleries, sophisticated shopping and antique shops to choose from. Chinatown is one of the largest in North America and is a thriving commercial and residential district.

Gastown is the historical part of the city with cobblestone streets, heritage buildings, shops, restaurants and galleries. It's located just south of the harbor and is a vibrant place. Located just under the Granville Street Bridge is Granville Island Market which offers a mix of food, arts and crafts, shopping and theatres. Water taxis ferry shoppers to and from the market or you can stroll there.

Stanley Park, located close to downtown, has over 1000 acres of forest and is a firm favorite with both locals and tourists. The park has many kilometers of pathway, an aquarium, a pitch and putt golf course, a miniature railway, tennis, restaurants, beaches and on summer evenings live theatre. Robson Street is in the heart of downtown and offers boutiques, side walk cafes, shops and restaurants.

The city has many tree lined streets and no highway cutting through the city so walking is encouraged. It is illegal to cross the street anywhere but at a marked intersection crossing in the city.

There is an excellent public transport system which consists of buses, Seabus, Skytrain and a commuter rail service called the West Coast Express. This is an integrated system and you can use the same tickets for different modes of transport. There is also an extensive system of bikeways, so cycling is another good way to get around.

The Port of Vancouver rates number one in North America in total foreign exports and is the gateway for Asia-Pacific trade. It has a natural deep water harbor and covers 233 kilometers of coastline. In 2003 its total cargo traffic was 66.7 million tones. The Port is also home to the Vancouver - Alaska cruise, one of the worlds most popular cruises. There are many attractions in and around the city offering a wide variety of activities.

Grouse Mountain - located just 15 minutes from downtown, also known as the Peak of Vancouver. Riding the Gondola to the mountain top is an absolute must, in the winter you can experience the skiing, snowboarding, snow-shoeing, ice skating and sleigh rides and in the summer mountain bike tours, helicopter tours, tandem paragliding or maybe just enjoy the magnificent views at one of the restaurants.

Science World - located on Quebec Street offers hundreds of interactive exhibits, wrap around movies in a giant theatre and year round special events. There are always new exhibits arriving so it never gets boring.

Capilano Suspension bridge and Park - located 10 minutes from downtown is the city's most popular visitor attraction. The swaying footbridge bridge is 230 feet above the Capilano River and spans 450 feet. There is also a colorful Totem park, trails through the West Coast rain forest and much more.

Vancouver Zoo is located in Aldergrove just off the Trans Canada Highway. They are open all year round and offer either daily admission rates or season passes. There is a miniature safari train and a safari bus tour, you can also hire quadra cycles or bring your own bikes, in-line skates or any motor-less transportation to get you around.

The city Aquarium is situated 5 minutes from downtown in Stanley Park. They are a self supporting and not for profit group and are Canada's leading aquatic conservation organization. Open year round they have many different types of marine life to learn about and a daily schedule of shows. The Vancouver Canucks are one of the strongest teams in the NHL (Ice Hockey) and with the BC lions always very competitive, there is a good supply of sports choices.

Vancouver is without doubt the most impressive city I have ever stayed in and is a must to visit if you are in Canada. Undoubtedly one of the most expensive places to buy property in Canada but with the amount the city has to offer I can understand why. For more detailed information including full descriptions of each municipality, visit http://www.onestopimmigration-canada.com/vancouver.html