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Monthly Archives: July 2015

GCSE Mathematics – Hints and Tips to Help You Succeed

If you do nothing else, read this document carefully. Especially important is advice given at the bottom of the page on the exam itself.

Be prepared!

Have pens and sharpened pencils at the ready. Don’t use pens that leak or ones with broad tips. By the same measure, don’t use untried new pens. They may let you down. Use a pen that you know is reliable.

Write clearly!

You might be the next Einstein or Dirac but unless you write clearly we will never know! Anything the examiner cannot read he/she cannot mark. If you are a poor writer, please take the time to write neatly.

Read the question !

This is not wasted time. Read the whole question once to get a rough idea what it is about. Then read it again from the beginning – slowly. It is a good idea to tick off each line, including information in diagrams. Do not start until you are sure you thoroughly understand what is asked.

Be Accurate!

Again, read the question! If it asks for 2 decimal places or 3 significant figures, then that is what it wants. Before going on to the next question, check you answer with the original question.

Simultaneous Equations

The answers to these types of exam questions tend to be nice rounded numbers. If they have a decimal, it usually ends in .5, but these are rare. Answers with a line of decimals are probably wrong, so check for errors.

Inverse % questions

These are ‘backward looking’ problems. With current values given in the question, you have to calculate some original value before the decrease/increase occurred. Again, the answers tend to be rounded numbers. If you get a train of decimals, check back in your working.

Probability

Simply check that your answer is between 1 and 0; and of course, there are no negative values.

The Mean

Common sense here! Check that the number is not silly – too high/too low, and that it is between the highest and lowest values, and not outside them.

Rounding

Don’t round up calculator display numbers unnecessarily. If you do this, and the calculation has a number of stages, you final answer will be incorrect.

Quadratic Equations

A question asking for significant figures or decimal places indicates you should use the quadratic formula.

Pythagoras

Look at your answer. You should never get a length longer than the hypotenuse.

Trigonometry

Common sense here. Look out for silly answers. Again, lengths should not be longer than the hypotenuse.

Use of Bold Print

This means that the question is not straight forward. Bold print is a cue to read the question again carefully, so you understand exactly what is asked.

Materials

Tracing paper is useful for rotating shapes. Remember if you have forgotten something, don’t worry. Put your hand up and wait. The invigilator will come and supply you with the item.

Your answers

-write small
-show all working
-use words to describe your calculations/equation changes
-where space is at a premium, draw a vertical line and work either side of it, rather than sprawl work across a page

The Exam

Do not work late the night before, but do get up early to go through your final revision notes.

Revise right up to the point when you are told to come into the exam room, but please do not bring any revision materials into the exam room itself. Leave them in your bag outside.

Go through the paper quickly reading or scanning it to get an idea of what is asked.

Work your way through the paper. If you find any question particularly formidable, do not carry on with it. Come back to it later. You will lose valuable time being bogged down with one question. Get some easy marks in the bag first.

When you have finished do not sit arms folded looking up at the ceiling! You will not have scored 100%! There are some marks still to be had. Spend every last minute going through the paper carefully looking for errors. Trust me. There will be some!

There only remains for me to say good luck. But exams have little to do with luck. If you have done the work and revised thoroughly, you will undoubtedly do well. The fact that you are reading this shows your intent. So don’t look at exams as impossible hurdles to jump. Look at them as opportunities for you to shine and show everyone just what you can do!

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Related Mathematics Articles

Six Useful Ways To Help Kids Learn Mathematics Well

Before learning mathematics, little kids would have too many opportunities to know some simple mathematical concepts, which is not only lay the foundation for their future learning, but also enhance their life skills during the process of learning.

Several tips about how to learn mathematics well by kids are introduced below.

Firstly, rich and vivid language
In daily life, when taking with kids, parents should use such words for too many times such as full, empty, big, small, light, heavy, long, short, more, less and so on. At the same time, it is better to use simple sentences such as one book, two pieces of peanut and three doors.

Remember numbers mechanically
At the beginning, parents can ask kids to remember some words and numbers mechanically. In other words, they just need to remember them and it is not necessary to understand their meaning. Singing number songs, playing finger games and count things around them, all of which is beneficial to remember numbers and their orders mechanically.

Counting on purpose
For example, give kids two apples and teach them that there are two apples so that kids would understand that number two means two items. At beginning, it is wise to understand simple number such as one, two, three and so on. Finally, increase the number of items and ask children to know more numbers.

Understand the meaning of the numbers
Put three small size bowls in front of kids, when counting one, kids would touch their first bowl, when counting two, kids would touch their second bowl, when counting three, kids would touch their third bowl. From such learning process, kids would know the specific meaning of these numbers.

Do simple addition and subtraction
If you are smart parents, you should ask kids the questions after you tell them one interesting stories. For example, you tell them that the rabbit babies and rabbit mother are eating radishes, there are ten radishes in all and rabbit babies eat three radishes, how many radishes are there still? Parents can ask questions with the same form.

Give example to classify items
Put some red small bowl and some green small bowl in kids’ front, and then ask them to put the red ones together. As is known to all, classification ability is important to kids’ intelligence development, therefore it is necessary to pay more attention on such aspect. If parents want their kids to be good at classifying, you can ask them to classify candles, silver coins and so on.

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Magnets In Alternative Medicine

Magnets have been used for purposes beyond science experiments and picking up metal for hundreds of years. In fact, the Eastern cultures use magnets as key parts in some of their ‘alternative’ medicine. They provide an amazing alternative to the pharmacological zoo most Americans live in, and all of its possible side effects. Not all magnets are created equal, though, and it is thought that only the best will help. For the best magnets rare earth are the ones practitioners and manufacturers of magnetic jewelry go to. 

 
Rare earth magnets are the most powerful magnets made today. They generate a magnetic field far above those of other kinds like ferrite or ceramic. Developed in the nineteen-seventies and eighties to further the automotive industry, they were quickly adopted by other areas and are currently used in a great many products, including consumer electronics. Despite their power, though, they are very brittle and are often plated with other materials in order to protect them from chipping, breaking and even corrosion. 
 
Magnets rare earth magnets in particular, are said to increase blood flow, decrease pain, and provide all manner of positive effects for the mind and body. It is thought that the magnets will have enough effect on the iron, and other trace metals, in the blood to alter its course. Along with that is the knowledge that the body creates its own form of magnetic field, and the belief is that the imbalances of this field is what causes a great many medical issues. To this mind, powerful magnets may correct the problem. 
 
In alternative medicine, magnets are applied in a number of ways, depending upon the problem they are supposed to be fixing. There is a form of massage that utilizes magnets for those who want a relaxation exercise with their health care. There are blankets with magnets woven into them, magnetic creams, shoe insoles, and even magnetic mattresses. The most popular incarnation, though, is magnetic jewelry. Rings, bracelets, anklets, necklaces and watches, just to name a few, have been bonded with magnets in order to take advantage of the magnetic health principal. 
 
It should be noted that there has been no scientific proof of the positive effects of magnets on the body. The scientific community has decided that the positive effects that are seen are simply the result of the placebo effect, in which the patient believes he should feel better, so he does. 
 
Magnets rare earth and otherwise, are an important part to some health regimes. Though positive effects on the body may not have been proven, there are also no negative effects on the body; making them perfect for anyone who wants to try a new treatment or pain management technique. Magnetic jewelry even makes a great gift for the hypochondriac, sine it can be said to treat a great many illnesses, and cannot be over-used.
 

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Artificial Intelligence 'Arms Race' warning

Artificial Intelligence 'Arms Race' warning
Artificial Intelligence 'Arms Race' warning. Some of the biggest names in science are warning about the use of artificial intelligence weapons, in what's being called an "AI arms race." Mashable's Editor-At-Large, Lance Ulanoff joins Tamron Hall on …
Read more on MSNBC

EDITORIAL: Artificial intelligence challenges distinction between man, machine
Robo-ethics, the morality of how robots are designed and tasked, is challenging scientists and engineers to ponder the possibility — some say the inevitability — of artificial intelligence advancing far beyond simple self-awareness, to outsmart the …
Read more on Washington Times

Artificial intelligence : myths and realties

There has been a lot of myths, and also criticisms about the relatively new field of computer science called Artificial intelligence(AI). Some even believed that AI was the way to a rule by machines. Some say AI is nothing but nonsense cladded in technical terms. In this article I try to demystify this fascinating field to the common man

AI can be thought of as the quest of methods to make computers that have intelligence. Since computers are currently nonliving things, we may better think of it as the search for methods to extract intelligent responses from machines.


Believe it or not Ai widely uses one of the methods which unsystematic people like me daily uses in life: Search! Many problems are solved by using searches. Kasparov was defeated by a machine only because the machine could search faster and more efficiently, the sequence of positions that could result from moves of it and the opponent. Search in AI comes in many flavors like simple unorganized search to organized idea based heuristic search. AI people use lot of jargon to mystify their search methods like hill climbing, simulated annealing etc,.


Generally search is made on a network like structure joining the results of various operations. This structure is called a state space or even state space graph. differeant search methods crawl through this structure in different ways for a solution.


Modern Ai programs also use a lot of memorizing. They call it a knowledge base . But it is basically a set of facts or even rules stored in some sort of database. Computers do knot have the common sense to know simple facts like a man born in BC 1100 will not be alive now, or a mango cannot have 300 ton weight. This is one of the bottlenecks in AI. No commonsense!!


Also computers cannot do some things we do without intelligence. For example it will be difficult for a machine to identify a cat in a bush from the picture ,which even a four year child can do. AI have great difficulties for routine tasks. What a contradiction!! a computer can beat a grand master in chess, but cannot recognize a plastic mouse from a real one.


Despite all its limitations AI is helping us a lot in various fields like medicine, war, security and a lot others. About those things i will write later

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Overall Findings From The Literature Review

From their review of 38 studies that involved empirical analysis, Sireci et al. concluded that, in general, all student groups (students with disabilities, English language learners, and general education students) had score gains under accommodated conditions. While the literature review did not provide unequivocal support for interpreting accommodated scores as both valid and equivalent to unaccommodated scores, it did find that many accommodations had “positive, construct-valid effects for certain groups of students”.

Me reviewed studies focused on the issue of whether accommodations led to score increases, and whether the increases were greater for the targeted groups than for other test-takers. Evaluation of this interaction hypothesis has been central to much research on testing accommodations. Sireci et al., however, suggest a less stringent form of the hypothesis that stipulates that scores for targeted groups should improve more than scores of other test-takers. Although the results of investigating the interaction hypothesis (in either of its forms) are clearly useful in assessing the effectiveness of an accommodation, they cannot confirm that it yields valid score interpretations because they do not permit any determination of whether the accommodated and standard versions of the test are tapping the same constructs and whether they are equal in difficulty. Evidence that satisfies the interaction hypothesis criterion therefore does not constitute a sufficient justification for the use of an accommodation.

As an illustration of the fact that the detection of an interaction is not evidence that the accommodated score is a more valid measure of the construct in question, consider the following example. Suppose that all students in a class take a spelling test in which they must write down words after hearing them read aloud. A week later, they take a second spelling test of equivalent difficulty. This time, test-takers are told that they can request a dictionary’ to use during the test. Suppose that this accommodation is found to improve the scores of English language learners but not those of students who are native English speakers. For this part, learning a foreign language needs a leaning tools, many children choose Rosetta Stone Polish and Rosetta Stone Portuguese to learn Polish and Portuguese.Proponents of the interaction hypothesis would say that this finding justifies the use of the accommodation. In reality, however, nothing in these results supports the claim that the accommodated scores are more valid measures of spelling ability. In fact, logic suggests in this case that the accommodated version of the test measures a skill that is quite different from the intended one.

The fact that the accommodation affects English language learners and native English speakers differently may have any number of explanations. Native English speakers may have felt more reluctant to request a dictionary or been less likely to take the trouble to use one. Alternatively, they may have been close to their maximum performance on the first test and were not able to demonstrate substantial gains on the second test. Without some external evidence (such as an independent measure of spelling ability or, at least, of some type of verbal skill), no conclusion can be drawn about the validity of inferences from the accommodated scores relative to inferences from the scores obtained under standard administration.

After reading the article above, maybe you have learned something on language acquisition. But if you have the intention to learn more, use Rosetta Stone Swedish and Rosetta Stone Polish, both of which will never make you dissatisfied.

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Commonly Used Chemistry Lab Equipment and Its Uses

The professionals who work in chemistry labs and other facilities require efficient chemistry lab equipment to perform their jobs. While some labs require specialized equipment to address specific research and diagnostic applications, there is a variety of lab equipment and essentials that are used generally. This article discusses commonly used chemistry lab equipment and its uses.

Chemistry Lab Equipment to Serve a Variety of Purposes

Chemistry lab equipment is used for variety of purposes such as for chemical analysis, for assessing a wide range of conditions and the functions of organs, for holding samples, for heating and measuring solutions, for mixing different types of liquids, to analyze samples, and more. To carry out all these purposes, different types of devices are needed. Most lab apparatus comes equipped with advanced features and incorporates highly advanced technology, which ensures functionality, reliable service, and accurate analytical results.

Commonly Used Equipment in Chemistry Labs

Glassware: Commonly used laboratory equipment includes glassware. Glassware comprises a variety of equipment ranging from beakers, Erlenmeyer Flasks, test tubes, and more. Beakers are multipurpose lab containers used to hold and heat liquids. Erlenmeyer Flasks are essential to heat and store liquids. The advantage of the Erlenmeyer Flask is that the bottom has a wide area, so that a greater surface area is exposed to the heat. Other essential products that belong under this category include pipettes, pipette tips, shakers, filters, stirrers, mixers, rotators and disruptors.

Analyzers: Laboratory analyzers are indispensable in chemistry labs. Chemistry analyzers are used for carrying out a range of diagnostic functions, such as routine analysis of albumin, creatinine, glucose, bilirubin, and more. You can find fully automated chemistry analyzers, which are used to perform research functions at a faster rate and provide results within a minimum span of time.

Measuring Instruments – Balances and scales are used to measure the weight of a sample and determining its mass. There are several different types of balances and scales used in laboratory. These include:

Mechanical
Portable
Precision
Analytical

Microscopes: Microscopes are used extensively in chemistry labs for variety of purposes. These are beneficial for sample preparation, bulk sample analysis, and more.

Consumables and supplies – Apart from the specific lab equipment, reagents, controls, consumables are essential items that a lab requires for routine applications.

Other Types of Chemistry Laboratory Apparatus

Apart from the above mentioned essentials, other chemistry lab equipment that are commonly used in laboratories include centrifuges, refrigerators and freezers, water baths, dry baths, hot plates, and so forth.

To run your practice more efficiently, make sure that you equip your lab with such commonly used chemistry lab equipment. Technologically advanced devices enter the market every day. So ensure that you purchase equipment with technologically advanced features and also learn all its uses before you start. It is best to rely on any leading laboratory equipment supplier to purchase laboratory equipment. There are many providers offering a wide inventory of new and recertified models of important medical laboratory equipment. Apart from product sales, a reputable dealer can deliver excellent sales advice, installation services and post-sales support.

Block Scientific is a leading chemistry lab equipment supplier in New York, offering a wide range of laboratory products, from the industry’s most respected manufacturers. Established in 1980 and with over thirty years experience, Block Scientific can meet all your medical laboratory equipment needs, affordably and efficiently.
Website: http://www.blockscientific.com

Technology Services Atlanta

Technology
by kainet

A trustworthy web firm will be catered with a team of experts who are well versified in the latest courses. They’ll help you in moving ahead of your competitors by incorporating merchandising strategies with the latest techniques in website innovation. If you have tried your hand in the information technology services before then you could be well aware of the fact that IT is a fast poignant line of work and if you don’t keep yourself updated with the latest technologies then it could become quite confusing and bewildered therefore Technology Services Atlanta come up with the new technologies in the field of IT, network support Atlanta, Server Support Atlanta and IT maintenance Atlanta. Computers are civilizing almost every day and things are getting more and more perplexed in the IT region. If you have deliberated Information Technology earlier than now and you want to get back into it after a little quiet period then you might firstly require attending the IT boot camp in your area just to make acquainted y

ourself with the whereabouts of the business since you have been moved out.

Entrepreneurs or companies or Individuals running companies will rather sooner or later on feel the need to procure various kinds of software to make their business reasoning more relevant and professional by modern touchstone and more in synchronicity with the modern business surroundings. People could be in need for hiring or buying Technology Services, Enterprise Application Services and Infrastructure Management Services or may be Total Outsourcing and managed services Atlanta provides the best and complete outsourcing to the market. We provide Security Solutions, Email Solutions, PC desktop and Software Support Services to the people.

Whether it is any industry, IT Services plays a huge role in the overall performance of the entire business. Right from wide-ranging business solutions to basic sphere of influence, IT support Atlanta Services include each and every thing. Select your provider as per the suppleness and excellence it recommends to make your whole business proficient and worth your value of money.

Vedic Math Tricks And Number Computation Shortcuts For Easier Mathematics

It was about 1911-1918 when Sri Bharati Krsna Tirthaji rediscovered an ancient mathematical system from the Vedas.  This math system was termed Vedic Mathematics. This system involves sixteen word formula or Sutras where all mathematics are based on.  The formulas describe how the mind works and how it may be used to direct a student in finding solutions to math problems.  
Coherence is the most notable feature of Vedic math.  Unlike other systems that teach unrelated techniques, the whole Vedic system entails techniques that are unified and interrelated.  For example, the method for general multiplication can be reversed easily to produce one-line division.  The method for simple squaring can also be reversed to create one line for finding square roots.  In essence, Vedic math composes of easily understood methods that make dealing with numbers more enjoyable and innovative.  Difficult problems may be easily solved by Vedic math; which allows you to conveniently make mental computations.  
• Percentage equivalents.  In this method, fractions have specific equivalents that you can easily use in computations.  You may find useful tables containing these percentage-fraction-decimal equivalents.  For example, 1/3 may be written in fraction form as 0.33 and in percentage form as 33%. If in a certain problem, you are asked for the answer in 120 x 33%; you may simply substitute 1/3 to 33%. The result would be 120 x 1/3 = 120/3 or simply 40. If you can memorize the entries in the percentage table, then you will find computing number problems easier.  
• Sped conversions. In this method, you need to memorize the basic formula for converting km/h into m/s: 1000 m/3600 s or 5/18. If in a problem, you are asked to convert 50 km/h into m/s, the solution would be 50 x 5/18 = 250/18 = 14.
• Time addition.  If you are asked to add two hours and 23 minutes to three hours and 46 minutes. What you can simply do is add 223 to 346 to get 569. Regardless of what hours and minutes you are adding, you need to always add to the sum you have gotten. In the example, 569 + 40 =   609 so your final answer will be six hours and 9 minutes.  
• Squares of numbers.  You need a number near to the number whose squares you are looking for. As an example, find the square of 41. Your solution would be 40 + 41 + 1600 = 1681.
• Easier multiplication.  If you need to multiply a nymber by 5, you can just add zero at the end of that number and then divide by two. Example is 126 x 5. Add 0 to 126 so you have 1260; divide 1260 by two and you will have the answer. If multiplying by 25, simply add two zeros and then divide by four. Using 126 x 25 as example: 12600/ 4 to get 3150. If multiplying by 75 multiply by 300 and then divide the answer by four.  Again, with the example 126 x 75: 126 x 300 = 37800/4; the final answer will be 9450.

Discover techniques based on Vedic math that will help you in making mental computations with Fun With Figures.  Another recommended product on solving number problems using Vedic techniques is Vedic Mathematics Secrets.

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Levaquin Linked To Tendon Ruptures

Levaquin and Tendon Ruptures:

 

Levaquin (fluroquinolone) is used to kill common bacteria that cause lung infections, skin infections, and urinary tract infections.  Recently, it has been linked to an increasing occurrance of tendon ruptures and damage. Tendon ruptures have occurred in the rotator cuffs, biceps, hands, and thumbs. The most common tendon rupture is the Achilles tendon rupture. This kind of tendon rupture consists of a total tear of the muscle connecting the calf muscle and the heel of the foot. An Achilles tendon rupture impairs one’s ability to walk and may require rehabilitation. Symptoms often include sudden and severe pain, swelling, bruising, and difficulty walking. Patients who experience any of these symptoms should contact their doctor immediately to discontinue Levaquin treatment.

 

The FDA and Levaquin:

 

Hundreds of complaints linking tendon ruptures to Levaquin use have been filed with the FDA.

 

As a result, in August 2006, Public Citizen, a consumer advocacy group, petitioned the FDA to add a black box warning to Levaquin’s label meant to caution patients about the possibility of tendon rupture.  On July 8, 2008 the FDA finally decided to place the black box warning on Levaquin to warn patients of the risk of serious tendon rupture or damage. 

 

 

Tendon Rupture Litigation:

 

The manufacturer of Levaquin, Johnson & Johnson and its subsidiary Ortho McNiel Pharmaceuticals Inc., are being sued by victims of Levaquin side effects.

A number of Levaquin lawsuits have been filed against Johnson & Johnson and their subsidiaries alleging that they failed to provide adequate warnings about the potential risk of tendon damage. The lawsuits claim that if users had been warned about the potential tendon side effects, they could have contacted their doctors at the first sign of problems and avoided a rupture or permanent damage.

In a status conference for Levaquin tendon rupture lawsuits, U.S. District Judge John R. Tunheim, who is overseeing the Levaquin consolidation in Minnesota, indicated that the first multi district litigation cases are to be “trial ready” early in 2010.

If you have experienced a tendon rupture or  tendon damage  from taking Levaquin you may be entitled to compensation and should contact a lawyer for more information about the Levaquin lawsuits.

 

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