Archive for Science Tips
01.27.10
Posted in Science Tips at 9:08 pm by admin
DIY option then you could start to produce your own electricity for under $200, possibly even for less that $140 if you are good at recycling materials. Yes the savings really can be that high, on top of the savings that you will be making on your power bills going forward. Wind turbines perform better and create much less noise as compared to what they were able to deliver 5 years ago. With wind energy, if you are able to create energy surplus than your requirements, you could benefit from a local net-metering. More and more people are becoming aware of the environmental needs today and they are looking into the various methods of doing their part. We can do so much to help both the environment and our wallets and if we only take the time to research the proper ways we will be able to see what is needed to be done. A vertical wind turbine will do this and you will not have to worry about it being an eye-sore in the neighborhood. More and more individual homes and farms produce free electricity and soon personal windmills may be the only way that people are heating their water in their homes. Turbines (VAWTs) that are quiet, eco friendly, and ideal for home use in urban areas. In the world of vertical Wind Turbines, there is one called the Savonius rotor. If you take a 55 gallon drum and cut it in half, place them on a shaft that turns, you a Savonius. If is not high tech and does not produce high efficiency, but some have redesigned it to have presentable efficiency. The market also has the Darrieus. It might look like an egg beater.
Source: Wind Power
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12.03.09
Posted in Science Tips at 10:19 pm by admin
Inside the alternator/generator it is the effect of magnets moving around a piece of electrical wire that forces electrons to move through the wire — and there we have it, electricity. In most cases the electricity is then stored in a bank of batteries, ready for use by whatever systems are connected into it.
Personal wind power used to be a more a rarity to build because these systems cost thousands of dollars to buy a fairly expensive price-tag to build (not to mention the difficulty). Things are different now. You can build your own personal wind power system for a very modest price tag, high power output, and a few days in the shop. This article will display that there really isn’t much to it anymore and the why behind it all.
Even gentle breezes will produce power which is stored in batteries till needed. If you live far from electric power lines you either get by with no electric power or generate your own. Gasoline powered generators will do the job but they are expensive to run and heavy polluters. You may be fortunate enough to have a stream which can generate power for you using a water power system but these are usually difficult to build and expensive. In most situations a wind turbine is the best answer. You can in fact build your own wind turbine for much less than the price of a commercial model. You could have plenty of power for all needs if you install two or three of them. During the lifetime of a wind turbine, the wind turbine can prevent 1.2 metric ton in air pollutants. This alone will help preserve the planet for future generations, especially our children. The cleaner the air, the better we breathe, the healthier we will all be. Many residential customers think that converting to residential wind power will be hard or they will need to replace all the wiring in their home.
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10.18.09
Posted in Education Portal, Mathematics Resources, Science Tips at 3:40 pm by admin
Mathematics has many subdivisions and algebra is one of the most stressed branches which studies structure, relation and quantity. Algebra works with numbers, symbols, elements and variables. Students are introduced base concepts and methodologies of resolving equations in elementary algebra like solving quadratic systems of equations, understanding polynomials along with factoring binomials, trinomials and polynomials as well as the determination of their roots.
Many beginners in algebra prefer linear equations as they are the simplest to solve. Simultaneous equations with two or three variables is an extension of linear equations. As we progress further in the sequence to quadratic, bi-quadratic and cubic equations, they become more and more complicated to resolve.
The Origin of Algebra
Elementary algebra establishes the intermediate or college algebra. Apart from addressing mathematical expressions, it also consists of all forms of equations like linear, quadratic and cubic. All geometric figures such as circle, hyperbola, and parabola can be represented as equations.
The equations can be resolved to get a graph. Lines are the product of graphing simple linear equations. It is quite simple to solve systems of equations when represented graphically. A system of equations is two or more equations with the same number of variables. They can be both linear and non-linear. Systems of equations with inequalities (example; x>y) when graphed gives an area on the graph which matches the inequality condition.
Matrices are one of the most main areas of linear algebra which assists solving complicated problems like the ones existing in electrical networks. A matrix is a rectangular array of numbers arranged in rows and columns. The numbers in a matrix are known as entries. Several functions like addition, multiplication and decomposition can be performed on matrices thereby offering theoretically and practically usable mathematical solutions.
Help for Algebra
Due to the solid theoretical and practical background, algebra behaves as the backbone for some other scientific disciplines. The invention of computers has made algebra easier than what it was and therefore it has taken an all different crucial position. Algebra is not as complicated as it may sound. There is a plenty of help and tutorials available to help you through the algebra lessons.
Net resources like algebra solver are interactive, present algebra lesson and assistance you resolve many matters connected to algebra from Algebra-1 to College Algebra. If you have not understood something in the algebra course of study or feel that you have missed an principal mathematical concept, online tutors, Internet resources, and online algebra courses can provide you that additional help. Algebra calculators take you through your homework with a step-by-step calculations and explanations. You can improve your knowledge with the help of the interactive tools. By taking an online test, you can self appraise your knowledge of algebra.
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08.12.09
Posted in Education Portal, Mathematics Resources, Science Tips at 10:09 pm by admin
It is safe to say that algebra is the center of mathematics. An in depth knowledge of algebra and its basics is required before you could work on other mathematical problems. Deriving the result for the product of 223 and 112 is quite easy if you use a calculator. However, in a case where you need to work around the exponential of 223 and logarithm of 112, you will certainly need an algebraic software application. Graphing a circle will be easy for this given formula X2 + Y2 = 4 but when it comes for an inequality like (X-2)2 + (Y-4)2 > 20 then it will be quite harder to plot the graph. In this situation algebra software package can help you a great deal since you only need to enter the inequality and graph will be plotted within a fraction of second. These kinds of software systems can very easily resolve any kind of algebraic, arithmetical and radical expressions of any level of difficulty.
Finding Domain and Range of a Function
Now it is very easy to work out the domain and range of functions like Y = X2, you can just tell that X and Y can take any real number from the X-Y plane but have you ever thought of defining the domain and range of log(tan 2x + sin 3x) = cosine(-4)(2x). But now you can solve such critical and complex problems with an algebra calculator without breaking sweat and you will also be getting all the steps as well
Coordinate Geometry
Now you can easily find the focus and directrix and whether parabola opens up or down by just feeding the equation into algebra software program. Addition, subtraction and multiplication of binomials are quite tedious, since they involve lots of terms to manipulate. However, by leaving the job up to algebra calculators, you will be able to get results within a shorter period with 100% accuracy. Similarly, algebra calculators can save the trouble for you in calculating matrices of 33 or 44 order or its inverse matrices .
So now you don’t need to start worrying when you see indices, rational numbers or exponential equations. Parabolas, hyperbolas or ellipses can all be easily graphed within computer algebra systems.
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07.21.09
Posted in Online Health, Science Tips at 7:48 am by admin
Oncologists decide what course of treatment to prescribe to a patient. There are numerous options. There exists no one size fits all treatment regimen for peritoneal mesothelioma sufferers. This is because of the relative rareness of the disease, the high mortality rate and low treatment success rate, and the few scientific studies to provide meaningful statistics.
While prospects for patients with mesothelioma have been bleak, doctors have been making progress. Customary treatments for cancer are surgery (removing the tumor and the tissue that surrounds it), radiation (killing the cancerous cells with radiation), and chemotherapy (poisoning the cancerous cells.) There are problems with all three. Patients with mesothelioma have not responded well to traditional radiation therapy. Researchers are looking for ways of aiming radiation directly at the tumor in hopes that this will result in less damage to healthy tissue.
The mesothelial tissue around the tumor is removed by surgery. This surgery is extensive and it is not clear how much the patient benefits. The usual chemotherapy cocktails effective on other cancers are not effective on mesothelioma, and different combinations of chemotherapy drugs have been tried without a lot of success. Similar to radiation, focus in research is focusing on treating the physical location of the tumor with emphasis on the pleural cavity.
The high-mortality rate for mesothelioma patients means cutting-edge techniques for cancer are tried out. These include biologic therapy such as the agent interleukin 2 and anti-angiogenesis drugs such as thalidomide. Pemetrexed (Alimta) is a new drug that has shown results in extending life.
Considered by oncologists is where the tumor is located, what stage the mesothelioma is in, and the age and health of the patient. Two exotic ways of attacking mesothelioma are gene therapy and photodynamic therapy. Patients afflicted with mesothelioma are benefitting in these clinical trials.
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06.15.09
Posted in Education Portal, Mathematics Resources, Science Tips at 6:31 pm by admin
What is Algebra?
It is an area of mathematics that use letter of the alphabets in replacement of numbers to derive results for a given situation. It is this generalization that often frightens many and thrills some. topics of algebra extend from working with fractions to factoring binomials all the way to finding the inverse of a matrix. In nearly all cases, just as in any other mathematics associated class, students start off by adding, subtracting and simplifying algebraic expressions . They then move on to understanding equivalent fractions, finding Least Common Multiples (LCM) and converting fractions to decimals.
Oh no! It’s Exponents, Radicals and Graphing
There are numerous higher level themes. To start off with there are exponents. A power is the tiny number placed as superscript to a number or algebraic expression. In this example (x + y)3 where the 3 is the power and denotes the power to which that number is exponentiated. The above algebraic expression is read as, x plus y to the third power. While working with exponents you will oftentimes come across exercises that require you to add, subtract, multiply and divide. You can work with rational and negative exponents. If that isn’t enough to make your head spin, then you can move on to radicals. A radical, in simple terms, is the reversing of an power. The V beside 4 denote a radical expression which means, the square root of 4, which equals 2. The contrasting exponential equation is 2^2 which is read, 2 to the 2nd power, and equals 4. As with exponents, radical expressions can be added, subtracted, multiplied and divided. Radicals can be switched into powers and powers back into radicals. If you find that powers and roots don’t really stimulate your interest, you could move on to graphing. Start with graphing straight lines and deciding if the line is horizontal or vertical or neither. Another question to ask is whether the line has an x-intercept or a y-intercept Furthermore, try and see if you can find the slope of a line. Once you master graphing lines, a whole world of circles, parabolas and hyperbolas awaits you!
Help is Available
While you are learning algebra if the terms and concepts seem too much to handle, relax and take a break. There are many resources out there that can help you master quadratic systems of inequalities, quadratic formulas and polynomials. Look for math tutors or software applications that will walk you through gradual process on how to solve any problem. Know that frustration is not your only friend because any of these tools can assist you become an algebra expert in very little time.
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06.10.09
Posted in Online Health, Science Tips at 4:52 am by admin
Mesothelioma has a few primary symptoms. Pleural mesotheliomas main symptom is a lack of breath as a consequence of pleural effusion ” the buildup of fluid in the pleura, or membrane, surrounding the lung. The second most common symptomis chest pain due to the tumor invading the chest wall. Additional symptoms include night sweats, weight loss and exhaustion.
The primary symptomof patients with peritoneal mesothelioma, which originates in the abdomen, is fluid buildup (known as ascites) in the abdomen causing abdominal swelling, pain in the abdomen, and blockage of the bowel.
It is important to note that these symptoms could be caused by a myriad of diseases or conditions. But if you have experienced any of these symptoms and have had asbestos exposure, you should see your doctor.
Peritoneal mesothelioma cancer is hard to identify, because the symptoms are also experienced in less serious health issues. Symptoms typical for mesothelioma:
- Difficulty breathing
- Chest or lower back pain associated with an excess of fluid in the pleura
- Fever
- Upset stomach
- Hoarseness
- Difficulty swallowing
- Spitting up blood
Do not attempt self-diagnosis. People suffering from the above symptoms should remain calm and consult a doctor. The standard way to confirm the condition is with a biopsy. A pathologist removes a piece of tissue from the region that cancer is suspected and performs an examination that will result in a very accurate diagnosis. Usually, biopsies do not hurt.
CT scans (Computed Tomography) are an option to avoid a biopsy. This is an X-ray procedure where a scanner takes many cross-sectional images as it rotates around the body. Once in a while, a dye is ingested by the patient to help define the images. CT scans have an advantage over biopsies by being easier and non-invasive, and they are known to be an effective diagnostic tool. Beliefs vary whether a biopsy or scan is more cost-effective. If there are irregularities, a biopsy may also be ordered to determine if a tumor exists, and if so, if the tumor is benign or malignant. It is also possible to diagnose pleural mesothelioma by taking a sample of fluid from the pleura and testing it for the presence of cancer cells.
These methods can also diagnose and screen patients for mesothelioma. Patients are screened when they suspect they may be at risk but do not have typical symptoms, to make sure they are not in danger or to catch the cancer as early as possible. Patients should be screened for mesothelioma if they have a history of asbestos exposure.
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05.08.09
Posted in Education Portal, Mathematics Resources, Science Tips at 9:47 pm by admin
Algebra is the one which is used for getting our common tasks accomplished. We are a kind that constantly continues counting, measuring, dividing, and multiplying.
The History
Invented in the first millennium BC, algebra was first invented in the middle-east. The ancient geniuses used algebra for solving daily problems while the Asian or rather Chinese counterpart used geometry for the same purpose
The Nature of Algebra
Although you may see algebra as solving formulas, simplifying rational expressions , and converting fractions to decimals, algebra is one of the sciences that has the most applicability when it comes to the real world. Since this aspect has been understood, the education system forces us to learn algebra from the inception of our student life.
Algebra I
The pupils are given an introduction in this study course to numbers, solving linear equations, graphing systems of linear equations, graphing linear inequalities, laws of exponents, solving radical equations , and factoring polynomials. This is the foundation level course for all the other advanced stages of algebra.
If a pupil is keen on learning algebra down to its roots, then this is a subject area course of study that should be tackled well.
Algebra II
Once the pupils are sound with Algebra I concepts, Algebra II can be taken up for widening the spectrum of this wonderful section of mathematics. There are two aspects of Algebra II; emphasizing more on the topics learned in Algebra I and foundation to new concepts. When it comes to the new introductions, adding and subtracting matrices, quadratic functions, resolving exponential equations, probability and statistics are notable.
At this level, the subject fields are more focused on the depth of mathematical concepts rather than the coverage of many topics.
College Algebra
This is one of the most crucial levels of learning Algebra with nearly no new topic brought in. I assume it is rather ironic, but this is what maths is. Mathematics is called the queen of all sciences. Do you know why? That’s because of the unforeseeable nature of maths!
How to get aid on Algebra?
There are many methods and tools accessible for getting assistance for Algebra studies. The first and the foremost primary source is an Algebra tutor from whom you can get help and aid.
In addition to the above methods, one should never underestimate the use of Algebra package that is especially designed to solve algebraic problems with illustrative steps. This software package really contributes insight in to Algebraic operations of solving equations, by providing pupils to simply watch and learn through good examples.
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