Feb 1, 2014 Home Improvement
We are urged to rebuild what damage we have done to the environment before it’s too late. We only have one planet we call Mother Earth anyway, so it’s not like the human race can evacuate and head out to Mars when Earth’s deterioration has become a hopeless case for humans and other living things to live in. That notion about the possibility of living existence in Mars is still a possibility. No conclusive findings yet. Until scientists have proven that it is indeed true, let’s not expect a bunch of us purchasing a property to build new homes in that side of the universe.
Caring for the environment as much as we can is a responsible act, one that carries much gravity considering the current state of our environment. Therefore, in our own ways, we must do our share to lighten the burden of the environment and eventually prevent further damage. Even beautiful things like home decors are hazardous to the environment and to our health too, such as paints and carpets. In opting for eco-friendly materials, we are all doing ourselves a favor.
If you’re planning to go vegetarian, do you suddenly eliminate meat from your life all in one day? Of course not, that’s heading straight to rebound. You do it slowly, excluding meat from your diet one small step at a time, allowing your body and mind to get used to the idea. It’s a new lifestyle, one that you are not used to. Same is true with going green. You just don’t do a complete overhaul and buy every eco-friendly item out there. You need information and the right mindset to stay disciplined. The easiest way to start is to use recycled and re-used products. Even if you don’t purchase, you can recycle and re-use your own stuff.
Use reuse or recycled products as much as possible and you are doing a simple yet effective way of protecting the environmentand your savings. These products are as eye candies as the conventional ones, sturdy and long lasting. Natural made products are the same. Not because an area rug is made of bamboo that it looks primitive or a rug made of wool looks like a sheep. A wide selection of natural products have aesthetic quality that will make your home look much better.
Carpets and rugs should be made from natural fibers, and it is now possible to find recycled fiber floor coverings too. Rugs are available in a particularly wide range of natural fibers, including wool, cotton, jute, hemp, bamboo, seagrass and silk. All of these now come in a wide range of styles and colors, so that you should be able to find rugs to suit the size and decor of any room in your home, and especially to suit your earth friendly theme. Remember that the backing material of your rugs or carpets should also be made of natural fibers.
Decorative items such as lamps, vases, throw pillows and other accents that are considered eco-friendly are also accessible.
Smaller items like home accessories are widely available in an eco-friendly variety. Many of them are made with natural materials. Another way is to go to thrift and yard sales and purchase used items. You’ll definitely find a good bargain. This is way better than going to a department store and buying a brand new lamp and vases for instance, which will lead then to the production of more to restock your purchase, resulting to more waste, chemicals and synthetic materials added to the already mountainous pile of mostly non-biodegradable waste.
Small things count and they make a big difference. A single purchase of a recycled area rug is a weight shifted towards the environment and not against it. The more people support eco-friendly products, the higher the demand thus, more production. It’s nice to think that sometime in the future before it’s too late for us, we will all be using environment-friendly products and living an environment-conscious lifestyle.
Jan 28, 2014 Ventilation
The roof of good quality is a vital function in the whole house. Protects not only the house but if it is built well and put up good then it will protect everything inside the home. When considered the elements that most buildings should address them shouldn’t is hard to understand why you have to make sure you have the best roof you can. The ventilation of the roof is also an important part of the house too. Not only ensure the safety and long life and roof of the house but also ensure the safety of residents.
The benefits of roof ventilation
When the roof jump down or become substantially damaged many people put this down to the materials difficult or enforcement difficult, and while one or the other could be true is most often the case that there was inadequate ventilation of the roof so far. Not have the proper ventilation of the roof or the right level of ventilation of the roof often leads to a reduction in the roof ‘s life of St An average household produces four – five pounds of water vapor per day and if the house has roof ventilation difficult, this means that the steam has nowhere to go.
Instead form condensation on the edges of the wooden roof that causes them to arch, twisted and contorted. In turn, the difficult ventilation leads to a greater likelihood of damage and wind events increased the slats of unexplained fall or tile. There are two sides to effective ventilation of the roof. It is essential that the ventilation of the roof of good quality consisting of a discharge as an outlet.
The difference in temperature between the inside of the roof and the outer edge of the roof can be voluminous, and only through using an outlet and an outlet these temperatures may be at a constant level. Has only one type of ventilation of the roof is the equivalent of not having any ventilation of the roof and may actually cause some more damage to have only one that does not have neither.
Different types of ventilation of the roof
There are many different methods of providing adequate ventilation of the roof and more is definitely better. Each type of ventilation of the roof it was’ positive if it ‘s the negations in order to consult with your company for construction of roofs and decide among yourselves which is likely to be the best decision for your home in terms of both effective and aesthetic. Have adequate ventilation of the roof can be the difference between a roof and having to replace durable every ten years or so.
Two kinds of effective ventilation of the roof
The Dormer vents are one of the worst forms CONUN used for ventilation of the roof because they are relatively easy to adapt and can be fitted to the rear of the house in which it is easy to keep hidden. Give the perfect combination of adequate ventilation of the roof without being an eye up. Possibly the most effective method is to use the turbine fans, however, that may seem ugly when placed on your roof and become very difficult to handle once they ‘the VE installed for any length.
Jan 19, 2014 Commercial Controls
Why use snap-fits? This chapter will give you a thumbnail sketch of the benefits of snap-fits and the materials used to make them. Snap-fits are the simplest, quickest and most costeffective method of assembling two parts. When designed properly, parts with snap-fits can be assembled and disassembled numerous times without any adverse effect on the assembly.
Snap-fits are also the most environmentally friendly form of assembly because of their ease of disassembly, making components of different materials easy to recycle. Although snap-fits can be designed with many materials, the ideal material is thermoplastic because of its high flexibility and its ability to be easily and inexpensively molded into complex geometries. Other advantages include its relatively high elongation, low coefficient of friction, and sufficient strength and rigidity to meet the requirements of most applications.
The designer should be aware that the assembly may have some “play”due to tolerance stack-up of the two mating parts. Some snap-fits can also increase the cost of an injection molding tool due to the need for slides in the mold. An experienced designer can often eliminate the need for slides by adding a slot in the wall directly below the undercut or by placing the snaps on the edge of the part, so they face outward.
Dec 31, 2013 Energy Talks
A new magnetic effect was discovered by accident when a UC Berkeley postdoctoral researcher and several students grew graphene on the surface of a platinum crystal. Graphene is a one atom-thick sheet of carbon atoms arranged in a hexagonal pattern, that looks like chicken wire. Examination showed when grown on platinum, the carbon atoms do not perfectly line up with the metal surface’s triangular crystal structure, which creates a strain pattern in the graphene as if it were being pulled from three different directions.
Michael Crommie, professor of physics at UC Berkeley and a faculty researcher at Lawrence Berkeley National Laboratory runs the lab where the discovery was made. Charles Kane and Eugene Mele of the University of Pennsylvania first predicted the appearance of a “pseudomagnetic” field in response to strain in graphene for carbon nanotubes in 1997. Nanotubes are a rolled up form of graphene.
Crommie explains the strain produces small, raised triangular graphene bubbles 4 to 10 nanometers across in which the electrons occupy discrete energy levels rather than the broad, continuous range of energies allowed by the band structure of unstrained graphene. This new electronic behavior was detected spectroscopically by scanning tunneling microscopy. These so-called Landau levels are reminiscent of the quantized energy levels of electrons in the simple Bohr model of the atom.
Crommie said, “This gives us a new handle on how to control how electrons move in graphene, and thus to control graphene’s electronic properties, through strain. By controlling where the electrons bunch up and at what energy, you could cause them to move more easily or less easily through graphene, in effect, controlling their conductivity, optical or microwave properties. Control of electron movement is the most essential part of any electronic device.”
Inventive engineers take note – this opens a new field.
What happens is the electrons within each nanobubble segregate into quantized energy levels instead of occupying energy bands, as in unstrained graphene. The energy levels are identical to those that an electron would occupy if it were moving in circles in a very strong magnetic field, as high as 300 tesla, which is stronger than any laboratory can produce except in brief explosions, said Crommie. For comparison, a magnetic resonance imager uses magnets running at less than 10 tesla, while the Earth’s magnetic field at ground level is only 31 microtesla. The scale, while atom sized on one dimension – is incredible.
Meanwhile over the last year Francisco Guinea of the Instituto de Ciencia de Materiales de Madrid in Spain, Mikhael Katsnelson of Radboud University of Nijmegen, the Netherlands, and A. K. Geim of the University of Manchester, England predicted what they termed a pseudo quantum Hall effect in strained graphene. This is the very quantization that Crommie’s research group has experimentally observed. Boston University physicist Antonio Castro Neto, who was visiting Crommie’s laboratory at the time of the discovery, immediately recognized the implications of the data, and subsequent experiments confirmed that it reflected the pseudo quantum Hall effect predicted earlier.
This is pretty cheerful stuff. Crommie observes, “Theorists often latch onto an idea and explore it theoretically even before the experiments are done, and sometimes they come up with predictions that seem a little crazy at first. What is so exciting now is that we have data that shows these ideas are not so crazy. The observation of these giant pseudomagnetic fields opens the door to room-temperature ‘straintronics,’ the idea of using mechanical deformations in graphene to engineer its behavior for different electronic device applications.”
The catch in all the excitement is the nanobubble experiments performed in Crommie’s laboratory were performed at very low temperature. Crommie notes that the pseudomagnetic fields inside the nanobubbles are so high that the energy levels are separated by hundreds of millivolts, much higher than room temperature. Thus, thermal noise would not interfere with this effect in graphene even at room temperature.
Normally, electrons moving in a magnetic field circle around the field lines. Within the strained nanobubbles, the electrons move in circles in the plane of the graphene sheet, as if a strong magnetic field has been applied perpendicular to the sheet even when there is no actual magnetic field. Apparently, Crommie said, the pseudomagnetic field only affects moving electrons and not other properties of the electron, such as spin, that are affected by real magnetic fields.
There’s a lot of pseudo so far in the press release and the paper’s abstract at Science. But the research effort is measuring the Tesla force. That point focuses attention is a major way. Getting to 10 Tesla requires lots of power and a source without such a power input thirty times as strong is prey worthy of the best minds in science. Should the effect make it beyond microelectronics in scale to say motors, the impact would be huge.
The long term potential isn’t known in precise terms. There is a great deal of further exploration and experimentation to come. Yet the early theory ideas have borne fruit – by accident.
The serendipitous post doc remains un named, but add to paper’s author list Castro Neto and Francisco Guinea, Sarah Burke, now a professor at the University of British Columbia; Niv Levy, now a postdoctoral researcher at the National Institute of Technology and Standards; and graduate student Kacey L. Meaker, undergraduate Melissa Panlasigui and physics professor Alex Zettl of UC Berkeley. It’s a paper that might be worth the reading fee for the inventive engineer.
Here is the original: New Energy and Fuel