Jan
31
The word “algebra” derives from the Arabic al-jabr meaning “the reunion of broken parts.” Algebraic concepts were used as early as 1650 B.C. in Egypt and Ancient Babylon, and were brought into Europe by the Arabs. And now, thousands of years later, judging by the mail in my inbox, it is a subject that many students need help with. Learn more at the following sites. Read more
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Jan
30
online graphing calculators – Latest online graphing calculators news – Assistant Professor of Mathematics – HigherEdJobs.com
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Hey Readers! I’ve been comin across some crazy stuff the past few days from a few different blogs around the web which I just had to share with you. Check em out below…
Assistant Professor of Mathematics – HigherEdJobs.com
College teaching experience is preferred as well as a familiarity with the use of technology (graphing calculators, online learning management systems, Read more
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Jan
29
online calculator with negatives – YouTube – MATHMAN: Two Negatives Equal One Positive
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I hope you’ve been enjoying my posts lately. I thought I might do something different today and rustle up a few bits of info from around the WWW. These are some of the news items and blog posts that have been popular over the last few weeks. Leave me your thoughts.
Used Ti 83 Calculator, Ti 183 Graphing Calculator, Ti 83 …
Yassir_Lester: #youwerecool and then you bought a TI-83 calculator. about 7 hours ago from TinyTwitter · Reply · View Tweet. Pic_normal. rachelannelewis: Anyone have an old TI calculator that can handle scientific notation they can lend …
Casio FX300ES 2-Line Scientific Calculator
Unfortunately, there's a bug in the firmware which turned up in a calculator exercise. If you key in 75025 and ask for it to be represented to 4 significant digits in scientific notation, the calculator gives the correct result, …
Ti 84 Usb Cable, Ti 84 Staples, Ti 84 Plus Silver Edition Graphing …
rachelannelewis: Anyone have an old TI calculator that can handle scientific notation they can lend to my dear friend @gracehenry for a little while? 23 minutes ago from TwitterGadget · Reply · View Tweet. Mathgo_normal …
Hope you enjoy the read as much as I did and please if you have something to say, use the comments form below to let everyone know your thoughts.
Have a great day!
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Jan
28
free online calculator graphing – Latest free online calculator graphing news – New cash for your old technology
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Ok so you might find the next few links interesting. These are from around the web, just random snippets that I’ve picked up in my reading, but I found some very cool information in them. You might too. Here goes…
New cash for your old technology
Georgetown student Leslie Hotchkiss recently got $21 for her old graphing calculator, a gadget she had to buy for about $90 Read more
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Jan
27
easy online calculator – Latest easy online calculator news – Labor Department Encourages New Yorkers to Use Online Calculator to Determine …
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I hope you’ve been enjoying my posts lately. I thought I might do something different today and rustle up a few bits of info from around the WWW. These are some of the news items and blog posts that have been popular over the last few weeks. Leave me your thoughts.
Labor Department Encourages New Yorkers to Use Online Calculator to Determine …
“This new on-line tool Read more
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Jan
26
online calculator with square roots – YouTube – Square roots on the Odhner.
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Using known risk factors for breast cancer, mathematical models can be developed to help answer important questions. These mathematical models are useful tools for researchers and for patients as follows:
1. Research on risk factors – The Claus risk assessment model was used to discover the subpopulation of people who had an autosomal dominant genetic allele that increased their risk from 10% to 92%. This led to the discovery of the BRCA genes associated with breast, ovarian, and prostate cancer.
2. Clinical trial eligibility – The Gail risk assessment model was developed to help researchers determine who to enroll in the NSAPB Breast Cancer Prevention Trials where chemoprevention was shown to reduce breast cancer risk.
3. Guidelines for doing BRCA testing – BRCA testing is very expensive and practically worthless if done on everyone (because it is so rare to be homozygous for BRCA1 or BRCA2). Mathematical models such as the BRCAPRO, BOADICEA, and Tyrer-Cuzick models can help determine what patients should undergo BRCA testing. The decision for testing is usually made when one of these models predicts a 10% or greater chance that there is a mutation of the BRCA1, BRCA2, or both genes.
4. Guidelines for doing MRI screening for breast cancer – MRI screening for breast cancer is not a cost effective screening test for the general population, but in specific groups, there are clear cut reasons to do so. In general, screening MRI is recommended for women with 20-25% or greater lifetime risk of breast cancer. The BRCAPRO and Tyrer-Cuzick models have been used to help make clinical decisions about ordering MRIs for breast cancer screening.
5. Guidelines for breast cancer therapy – The Gail model is used clinically to help determine who should be put on tamoxifen or raloxifene for chemoprevention. Other models have been used to help make decisions about breast cancer risk reduction with prophylactic mastectomy.
For these reasons, it is important to understand these models. These models are collectively refered to as “risk assessment tools”. The following paragraphs summarize the most popular and most widely used risk assessment tools. Keep in mind that none of these risk assessment tools apply to breast cancer survivors. No mathematical model has been widely accepted to determine cancer risk in cancer survivors.
General Risk Assessment Tools
Gail Model: The Gail model is a validated risk-assessment model that focuses primarily on nonhereditary risk factors, with limited information on family history. It was developed by scientists at the National Cancer Institute and the National Surgical Adjuvant Breast and Bowel Project (NSABP) to assist health care providers in discussing breast cancer risk to determine their eligibility for the Breast Cancer Prevention Trial. The tool allows one to project a woman’s individual estimate of breast cancer risk over a five-year period of time and over her lifetime. It also compares the woman’s risk calculation with the average risk for a woman of the same age. The Gail Model is an on-line quiz that has 13 questions and is interactive. This calculator is based on published risk statistics and methods gathered from peer-reviewed journals, and has been extensively tested for its validity.
The major limitation of the Gail model is the inclusion of only first-degree relatives, which results in underestimating risk in the 50% of families with cancer in the paternal lineage and also takes no account of the age of onset of breast cancer. It may underestimate risk in certain groups, such as obese patients.
National Cancer Institute Model: The NCI risk assessment tool is essentially a simplified Gail Model that also factors in race. Race is a factor in determining breast cancer risk but is excluded when determining eligibility for clinical trials. This tool is probably the most popular risk assessment tool available to the public as an on-line, interactive risk calculator. The on-line quiz is a shorter, nine-point questionnaire that includes multiple factors, giving a woman her future five-year risk of breast cancer and her lifetime risk of breast cancer.
The NCI tool does not account for a lot of risk factors that can be modified. For this reason, it is difficult to use this test as a motivation tool to show people how lifestyle can alter their risk of breast cancer. It also cannot be used in breast cancer survivors, in patients with DCIS, LCIS, or people who carry one of the BRCA genes.
BRCAPRO model: This is a statistical model available as a computer program that uses two different algorithms to evaluate family history and helps a doctor determine the likelihood of finding either a BRCA1 mutation or a BRCA2 mutation in a family. The results of this can be used to determine if BRCA testing is indicated. This is very useful in light of the high cost of BRCA testing ($3,000). None of the nonhereditary risk factors can yet be incorporated into the model, however. In a comparison of four different methods for estimating breast cancer risk in patients with a family history of breast cancer, the BRCAPRO model was the least accurate. It predicted only 49% of the breast cancers that actually occurred in the screened group of patients with a family history of breast cancer.
Harvard Center for Cancer Prevention Risk Assessment Tool: This is another breast cancer risk assessment tool that includes more lifestyle factors than the NCI or Gail Model tools. It has not been studied as extensively as the Gail Model or the simplified NCI model, but it is promising in that it includes many lifestyle factors that people can do to modify their risk of developing cancer. It is also an on-line questionnaire that can be used by both women and men to estimate their breast cancer risk.
About The Author
Dr. Mai Brooks is a surgical oncologist/general surgeon, with expertise in early detection and prevention of cancer. More at www.drbrooksmd.com, thecancerexperience.wordpress.com and progressreportoncancer.wordpress.com
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Jan
25
online calculator tool – YouTube – Holdem Genius Poker Calculator
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Many students find themselves stressing out about the higher-level math subjects, such as algebra, geometry, and calculus. But as they’re scratching their heads at the abstract formulas they’re facing in high school, there are some elementary students doing the same thing.
Often times, we forget that because elementary math has been simple for us for many years that young students struggle with it. When we see them struggling, we often feel comfortable diving in and trying to help. However, just because you know the subject doesn’t mean you’re good at reinforcing it. Sometimes, this is the role of a tutor. Why, you ask? Here are a few reasons …
Elementary Math is the Foundation
One major reason that it’s a good idea to seek the assistance of a qualified tutor, either in the traditional face-to-face sense, in a tutoring center, or via reputable online resources, is because of the importance inherent in creating a strong foundation in math. We all know how important math is to our everyday lives. Not to mention that it builds on itself at a rapid pace requiring the student keep up in order to have any success in the future. Think about it, how much success can your child have in middle school pre-algebra if he is not comfortable with basic fractions? The stronger your child’s foundation is in the earlier years, the greater probability there will be of success in the future.
You’re Not a Certified Tutor … Are You?
As mentioned previously, just because you understand certain aspects of elementary math doesn’t mean that you’re qualified to teach it. You may feel comfortable solving simple math problems, but when it comes to explaining the process to someone else – especially a child – it may be more difficult than you think. If you’ve been helping your child with math homework, but scores are not improving, then you may want to consider an elementary math tutor who is not only skilled in teaching the subject, but also working with young children.
You May Not Remember Everything
While you may feel comfortable teaching some aspects of math on your own, as your child reaches higher levels of elementary math, you may not remember everything that you need to remember to be a good homework helper. For instance, you may be good at the basics: addition, subtraction, multiplication and division. But what about ratio and proportion, measurement and graphing, or area, perimeter and circumference?
Do you remember how to use a protractor? How about a graphing calculator? Trying to remember the foundation of elementary math, along with any technological provisions that may not have been around in your day could make for a difficult homework session if you’re not prepared. When considering outside assistance, keep in mind that your tutor will already be up to speed in these areas.
Understand elementary math is a vital to your child’s success in future math subjects and should not be taken for granted. So if you see your child is struggling in this subject, it’s good to bring a tutor in to strengthen that foundation as soon as possible.
About The Author
TutorsAnywhere.com is a complete online resource that compares tutoring services and products offered by top online companies. If your child is in need of math tutoring, find the best solution for your family at http://tutorsanywhere.com/math-tutors/.
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Jan
24
online scientific calculators – Using a Scientific Calculator In Mathematics Exams
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With exams approaching this is a short article with reminders and advice for anyone about to take a mathematics exam and who will need to use a scientific calculator.The most common calculator problems are:
- setting up the calculator in the right mode
- not being able to find the calculator manual!
- remembering to change calculator modes
- rounding and inaccurate Read more
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Jan
23
online calculator with trig – Intermediate GCSE Maths Revision – Mistakes to Avoid in the Intermediate GCSE Maths Exam
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Intermediate GCSE Maths Revision – Mistakes to Avoid in the Intermediate GCSE Maths Exam
by: Nicholas Pinhey
Get More Marks (Without Knowing Any More!)
Intermediate GCSE Mathematics examines grades E, D, C and B. Each grade is worth 25% of the marks on the exam paper. Each Intermediate Maths GCSE exam paper starts off with the easier grade E questions and finishes Read more
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Jan
22
online graphics calculator – Graphing Calculators on the Market
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The graphing calculator simply said is a graphing program. The program graphs functions, relations, implicit and explicit, parametric and “straight,” in two and three dimensions. A good graphing calculator knows a wide array of mathematical functions already, including all the trig functions. You communicate to the calculator symbolically in equations and formulas. Read more
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