Saturday, June 15, 2019

Window Air Conditioners Versus Central Air Conditioners

Window Air Conditioners Versus Central Air Conditioners


window air conditioners versus central Window Air Conditioners Versus Central Air Conditioners

People today are very concerned about rising energy costs, so when it comes to staying cool in the summer, individuals are trying to figure out ways to cut down on their energy consumption. While there are plenty of efficient appliances to purchase that will keep your home cool, the real question is whether an air conditioning unit that you place in your window is more effective than a central air conditioning unit.

The Debate

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Which one will cool your home more efficiently and which one will actually save you money? Continue reading to learn about the pros and cons associated with each of these types of air conditioners so that you can decide which one is right for your particular needs and living situation.

The Pros and Cons of Window Air Conditioners

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Window air conditioners need to be carefully and securely placed in a window and then plugged into an outlet in order to operate. This can be a hassle because you’ll need to find a place to store you air conditioning unit each year if you wish to remove it from your window so that you can enjoy the view the rest of the year. Otherwise, you can keep it in the window, but you risk cold air seeping into your home during the winter as a result, which can cause your energy costs to increase as you turn on the heat to counteract the cold.

Older air conditioning units that go in your window aren’t very efficient. Therefore, replace any old units with modern ones if you wish to save money. To save the most amount of money possible, always purchase Energy Star units that have energy-saving modes that allow you to turn the unit on, set your ideal room temperature, and walk away. The unit will go into a resting mode automatically once it reaches that temperature, just as a central air conditioning unit would do, so this is very convenient and great for those who live in apartments.

The Pros and Cons of Central Air Conditioners

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Central air conditioners are really desirable because they don’t require you to set anything up or take anything down at the beginning and end of the summer season. Instead, the unit is available all year long, so even if the weather decides to get really hot in the spring, before you have had the chance to install your window unit, you can just turn on the air conditioner and get cool.

The central air conditioning unit is quite large, though, so it’s usually placed in the backyard of a home where it can be out of view and out of the way. It sends cool air through the duct system of a home and cools the entire house rather than just one room, making it very convenient, though you may not save a substantial amount of money when compared to an Energy Star window unit. Also, central air is more expensive to install and won’t be an option if you live in an apartment.

There are pros and cons associated with window air conditioners and central air conditioners. Depending upon your budget, your living situation, and your energy consumption, you can determine which one’s right for you.

Marlon Andrew is an installation supervisor at Constant Home Comfort, a company dealing in an array of furnaces in Mississauga. He enjoys travelling and exploring different cultures and cuisines when he gets free.

Photo Credits: image 1 image 2 image 3 image 4

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Spots versus Stripes

Spots versus Stripes


zebras Spots versus Stripes

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For years the fashion industry has been obsessed by spots and stripes. With inspiration for these patterns taken no doubt from nature; fashionable black and white stripes from the zebra for example, and spots from the coat of the leopard.

In fact, there are examples of spots and stripes covering many creatures, some of which retain their spotty or stripy pattern throughout their life; some that impressively change their pattern from stripes to spots as they grow into adulthood, like the impressive zebra shark (also known as the leopard shark); and some who are covered in both, such as the Brazilian tapir.

The development of these patterns in nature is not happening by accident. Alan Turing, famous for cracking the Enigma code that helped to end the Second World War, recently has had substance added to his 1950s theory around pattern formation, going some way to explaining how spots and stripes appear in nature.

His paper provided the foundations for research demonstrating that patterns are formed by the different rates of diffusion between an interacting of a pair of chemicals; one of which activates cell growth and the other of which inhibits the process. It is thought that this start-stop activity created by the inhibitor diffusing faster than the activator is behind the development of all repeated patterns in nature. This extends from the spots on the back of a ladybird to the number of spikes on a hedgehog, the arrangement of the floret on a cauliflower and even the number and spacing of hair follicles.

Computer calculations that took place in the early 70s demonstrated that this system creates two perfect types of pattern – spots and stripes, and any variations of these patterns are created by random defects. So why does a leopard never change its spots, a tiger never change its stripes, whereas a zebra shark’s pattern changes during its life?

This can be explained by genetics. The gene is responsible for the distribution of the different coloured pigments during development and these are affected by the morphogenesis process described above, creating the patterns and colours on the organism’s coat. These dictate whether the pattern appears to be uniform or more random. In instances where the pattern changes from childhood to adulthood, such as in the case of the zebra shark, the pigment pattern develops in the living creature.

The pattern differences can be seen across animals and species. Even within a species there can be wild variations. In cats, for example, coats range from stripes, to solid colours to blotches. Researchers have identified the specific gene responsible for the colourations and have demonstrated how the mutations of this gene can cause the pattern to change from splotches to stripes and vice versa. One mutation of the gene is also responsible for supressing pattern formation, which explains why some cats are just one colour. This explains how the differences have developed through the evolution of the species.

This is all very well, but what would be the purpose of this development of spots versus stripes and vice versa? The obvious answer that explains the variations in some creatures is that they have evolved to look like and therefore blend in to their environment, making them invisible to predators; or that they have evolved a pattern that resembles the poisonous markings of another creature, allowing them to be carefully avoided despite their benign nature. In the case of the domestic cat markings, it is thought that the mutation of the genes responsible for causing the pattern variations has actually happened in order for the cat to develop immunity and that their markings have simply changed as a side effect of this process.

Modern science continues to look into the mystery of spots versus stripes, gradually coming closer to a conclusive answer for why the leopard has its spots. Next time you visit the zebra shark in the aquarium or the animals at London Zoo, don’t take it for granted that their coats look different – marvel at the intricate differences and consider how and why they have formed over many years.

Rita Rova has a keen interest in the study of animals and writes for; the UK voucher code site that lists the current offers for visiting London Zoo, the Sea Life Centre and many more animal attractions at a discount.

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Droplets of Water Versus Insects

Droplets of Water Versus Insects


While the night covers the forest, many things can happen. For insects, like for humans, it is time for sleep. But droplets of water do not know any sleep. They are simply falling down. These pictures were taken by physiotherapist Miroslaw Swietek at around 3 am at night, in a forest near his home.

This 37-year-old amateur photographer makes shots of motionless bugs in the darkness before setting up his camera and flash just millimeters from them.

I don’t think that he can wake them up.

droplets insects Droplets of Water Versus Insects

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Images (c) Miroslaw Swietek

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Antarctica Versus Global Warming

Antarctica Versus Global Warming


Based on last year study, despite some past evidence to the contrary, the continent of Antarctica is warming together with the rest of the planet. The study took into account satellite measurements and found that between 1957 and 2006, temperatures in Antarctica rose an average of 0.18 degrees Fahrenheit. This could be a real problem in the future because the ice sheets hold enough water to raise sea levels by 187 feet if they will melt.

“We now see warming is taking place on all seven of the earth’s continents in accord with what models predict as a response to greenhouse gases,” said Eric J. Steig, a professor of earth and space sciences at the University of Washington in Seattle, who is the lead author of a paper published in the journal Nature in 2009. Because the climate record is still short, more work needs to be done to determine how much of the warming results from natural climate swings and how much from the warming effects of carbon dioxide released by the burning of fossil fuels, Dr. Steig said.

Credit: NASA, The dark red shows the area that has warmed the most.

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