Archive for the ‘Uncategorized’ Category

Indoor Air Purifiers Bringing Fresh Air Indoors

Wednesday, April 27th, 2011

Indoor air purifiers are becoming more necessary than ever as the number of pollutants in the air we breathe increases steadily. Despite the rising presence of smog and other contaminants in the outside world, the Environmental Protection Agency (EPA) estimate that the air we breathe outdoors is two to five times less polluted than the air we routinely inhale in our homes. Indoor air purifiers can help reduce this ratio and provide a home environment for your family that is safe and comfortable.

The air pollution findings reached by the EPA put a whole new meaning to going outdoors for a breath of fresh air. Our homes are our refuge from the world, and should represent a safe environment for our families. An indoor air purifier can help eliminate the dangerous particles and odors that permeate our homes, and help neutralize the harmful effects of these pollutants.

The type of indoor air purifier you choose will depend on any particular needs you might have, such as allergies or asthma, but choosing an indoor air cleaner that incorporates more than one technology increases the number of harmful substances that can be eliminated. Indoor air purifiers are extremely effective nowadays.

HEPA indoor air purifiers are one of the most reliable around, removing an estimated 99.97% of particles from the air. But even these high quality indoor air cleaners cannot fight against odors or chemical problems, which requires the use of activated carbon. Choosing an indoor air purifier that combines these features ensures that you are creating the best possible environment for your familys continued wellbeing.

Industrial environments, such as clean rooms, require optimal air purification, and choosing a commercial air purifier for your home can ensure that your family inhabit a safe and clean environment. The air in your home is two to five times more polluted than in the smoggy outdoors choosing a commercial air purifier will provide your home with the fresh, clean air you deserve.

Bring real fresh air to your home with an indoor air purifier, and invite the spirit of the great outdoors inside.

Indoor air purifiers are becoming more and more a necessary part of our modern life.

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Some Computer Viruses In History

Wednesday, April 27th, 2011

Computer viruses generally trick hosts or other types of computers into reproducing copies of the invading organism. They spread from computer to computer through electronic bulletin boards, telecommunication systems and shared floppy disks. Viruses are created by human programmers, for fun or malice, but once they begin to spread they take on a life of their own, creating disruption, dismay and paranoia in their wake.

If the virus is found in any of the PC’s that PC should immediately be isolated. The virus can be removed by giving an antidote by studying the virus. The machine should be put into use only after the virus is eliminated.
Viruses and such

A Virus is defined as a program inserted into another program. It gets activated by its host program. It replicates itself and spreads to others through floppy transfer. A virus infects data or program every time the user runs the infected program and the virus takes advantages and replicates itself.

There are two types of computer viruses ‘parasitic’ and ‘boot’ virus.

A Parasitic virus attaches itself to other programs and is activated when the host program is executed. It tries to get attached to more programs so that chances of getting activated is more. It spreads to other computers when the affected programs are copied. ‘Jerusalem’ and ‘Datacrime’ are parasitic viruses.

A Boot virus is designed to enter the boot sector of a floppy disc. It works by replacing the first sector on the disc with part of itself. It hides the rest of itself elsewhere on the disc, with a copy of the first sector. The virus is loaded by the computers built-in start-up program when the machine is switched on. The virus loads, installs itself, hides the rest of itself and then loads the original program. On a hard disc, virus can occupy DOS boot sector or master boot sector.
Some Reported Viruses

C-Brain: Amjad and Basit, two pakistani brothers, developed this software in January 1986 to discourage people from buying illegal software at throwaway prices. This was the most famous virus ever found and has a record of damaging few millions of personal computers. This is designed to stay in the boot sector of the disc or near zero sector. The virus enters the machine memory once the PC is booted with the infected floppy.

Macmag: This virus attacked Apple Macintosh computers only. Not much damage is reported because of this virus. This was not noticed on any IBM compatible PCs. It displayed a message of peace on the monitor and killed itself.

Cascade: This virus attacked IBM PCs and compatibles. The letters on the screen could be seen dropping vertically down to the bottom of screen after the virus picked them off in alphabetical order. This is a sort of parasitic virus. It attaches itself to other programs and gets activated when the host program is executed. It gets copied to other PCs when the programs are copied.

Jerusalem: Found in 1987 at Hebrew University, Jerusalem, this virus was designed to activate only on Friday, January 13 and delete all the files executed on that day. This infects the COM and EXE files. This is similar to Cascade virus in that it is parasitic in nature. This virus attaches itself to COM and EXE files to damage the data.

Daracrime/Columbus or October the 13th virus: This virus is similar to Jerusalem and was programmed to attack on October 13, 1989. Track zero of computer hard disk is destroyed and the contents of discs are rendered unreadable. This virus enters COM and EXE files and damages the hard disk. An antidote called ‘Vchecker’ was developed by the American Computer Society. Fortunately the virus was located in March 1989 itself and the damage reported after October 13 was minimal.

Bomb: This is also know as ‘Logic Bomb’ and ‘Time Bomb’. An event triggered routine in a program that causes a program to crash is defined as a ‘bomb’. Generally, ‘bomb’ is a software inserted in a program by a person working in the company.

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Great Landscape Photography

Wednesday, April 27th, 2011

Be at One with the Land.

Buyers and collectors have accepted photography as art for some time, but only if it’s of significant artistic merit. Great landscape photography sells because the buyer is searching for escapism and the need to dream. As a species we have always been linked to and drawn to the landscape. Do you have a love for the countryside and a understanding of the landscape?

When you’re out in the great outdoors, away from the bustle, what do you see …

… sunlight filtering through trees and dancing on the landscape?

… snow on the mountains and a gushing river in full flow?

… coastal cliffs with the shimmering sea lapping onto the shore?

… a brooding sky casting a spell over the windswept moors?

… the warm glow of the sun setting at the close of day?

… or mists and changing patterns of wind, clouds and magical light?

Do you see the beauty and feel the connection?

To produce a great photo landscape you need to understand the countryside and how light affects it. You need to have a passion for the land and experience an intimate connection with nature. The best way of doing this is to explore an area on foot and become part of the landscape before taking any photos.

On your walk look for:

* Light (shadows and highlights)

* Shapes (round and angular)

* Colour (harmony and discord)

* Texture (rough and smooth)

* Composition (strong and weak)

* Tones (light and dark)

* Patterns (even and odd)

* Mystery ( ? and ? )

So the next time you’re out with your camera looking for that open vista of rolling hills and mountains, also observe the intimate details in the landscape and maybe just photograph a small section of the bigger picture.

Your personality and your vision must come through in every photo you take; it’s up to you to capture the essense of the landscape in front of you. If your photograph works, the person viewing your image will feel they can step into your picture and experience the emotion of being there. A great landscape photograph is a great escape.

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Fighting Allergens On The Home Front

Tuesday, April 26th, 2011

While asthma and allergies are nothing to sneeze at, there could be good news for the families of the 8.9 million American children currently diagnosed with asthma and the millions more who suffer from allergies. They may all be able to breathe easier by fighting dirt and dander at home. Here are hints on how:

• Wash bedding regularly in hot water.

• Avoid feather pillows.

• Put a dust mite cover on your child’s mattress and pillows.

• Keep pets out of the bedroom and wash furry pets often.

• Replace heat and air-conditioning filters monthly.

• Use an exhaust fan when cooking.

• Keep curtains and blinds dust free.

• Defeat dust and dangerous allergens with a total filtration system vacuum cleaner.

Particularly helpful is one vacuum manufacturer that features a certified HEPA filter placed after the motor to capture motor exhaust along with the house dirt. The HEPA-certification means the filter will trap all particles, including pollen and other allergens, even those as tiny as 0.3 microns (the period at the end of this sentence is about 397 microns). The filter also has a charcoal layer to neutralize odors.

What’s more, the machines made by Miele have a special Sealed System, so even minute motes can’t escape back into the room. Even the vacuum cleaner bag is specifically designed and made from microfibers that attract particles much like the filter does, so it captures up to 50 percent more dirt and allergens than conventional paper vacuum cleaner bags. The bag is sealed shut when you remove it, so the dirt can’t get out again. You simply toss the full dustbag in the trash; there are no dust clouds and no dirty containers to wash out.

Company representative Paul McCormack explains: “Many doctors identify vacuuming as an activity that can pollute home indoor air quality. This is why Miele engineered a completely Sealed System-not only the dustbag chamber but the motor compartment as well-to ensure that the dirty air stays within the vacuum cleaner.”

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