Mathametics,trigonometry website

1 Webmath.com

www.webmath.org

Help is available in various categories, including the usual suspects—trigonometry, calculus, algebra, and so on. There are two ways to use the site—one is by browsing the tabs, and the other is by “Quick Jumping” to a topic of your choice.


2 Algebra Review in Ten Lessons

http://math.uakron.edu/%7Edpstory/mpt_home.html

If you can’t follow what’s going on in class, or if you need assistance with a particular type of problem, browse through the chapters and you’re sure to find a lucid explanation. Story takes pains to explain each and every step of what’s going on, which cannot be said about many textbooks (or professors). Highly recommended if you want a serious understanding of basic, and
even not-so-basic algebra.


3 Dave’s Short Trig Course

www.clarku.edu/~djoyce/trig/

After calculus, trigonometry is one of the toughest areas of highschool maths to master. “These notes are more of an introduction and guide than a full course,” as it says on the site. Use it to supplement your existing textbook.


4 The Math Forum @ Drexel

www.mathforum.org/dr.math/

the Math Forum discovered a dormant project called “Ask Prof. Maths,” where K-12 students could send in math questions and get personal answers



5 Homepage of e-Calculus

www.math.uakron.edu/%7Edpstory/e-calculus.html

As in one other site maintained by Prof D P Story that we’ve mentioned here, this one, too, is nothing site-wise: it’s a collection of PDFs.You’ll want to download them: they teach the subject well! Here’s an extract from somewhere near the beginning of the course



6 Euclid’s Elements

http://aleph0.clarku.edu/%7Edjoyce/java/elements/toc.html

Euclid’s Elements is the most successful textbook ever written. It was one of the very first works to beprinted after the printing press was invented, and is second only to the Bible in number of editions published.


7 EqWorld

http://eqworld.ipmnet.ru/en/solutions/ode.htm

Equations, more equations, then some more equations thrown in for good measure—that’s what you’ll find at this site. Not for the faint of heart or head, and, indeed, probably useful only as a quick reference for solutions to various advanced (and some not-so-advanced) equations.

8 Algorithms And Complexity

www.cis.upenn.edu/%7Ewilf/AlgComp3.html

A book for you to download—no more fumbling over what’s NP-Hard This is not a site; it’s just the download page for Algorithms and Complexity, by Herbert S Wilf. The “algorithms” part of the book is pretty standard, but we’re recommending the “complexity” part of the book. Still puzzled over what NP-completeness is? Still wondering what “NP-hard” means? Download this book!



9 Wolfram MathWorld

http://mathworld.wolfram.com/

12,646 entries. The big daddy of all the maths sites there are on the Web,Wolfram MathWorld is your single stop for everything maths—with a caveat: you’ll sometimes need to wade through incomprehensible stuff to get to something simple enough for you to Ah, Eric Weisstein again!
understand!


10 Online Mathematics Textbooks

www.math.gatech.edu/~cain/textbooks/onlinebooks.html

Hurry! “This site is far from comprehensive and I have considered abandoning it. Many people, however, still seem to find it useful

How To Dress for a Job Interview

The following list should give you a good idea of how to dress for a job interview :

Suit: A conservative, two-piece dark Grey or a dark blue business suit would be the ideal suit to wear on the day of your job interview.

Shirt: A white, long-sleeved dress shirt that is neatly pressed and has a good fit is recommendable.

Tie: Go for a plain colored, non-distracting, conservative dark blue or dark red necktie made of 100% pure silk.

Tie accessories: A classic silver tie bar ensures that your tie is held in place during the interview. Without one, you often end up adjusting your tie several times during the interview, which will make you look nervous.

Shoes: Clean and polished conservative dress shoes, black lace-ups if possible, would be your best choice.

Socks: Dark socks, black if possible, would be ideally suited.

Belt: The belt should match the color of your shoes, so go with a black one if possible

Hair: Make sure that you get a well-groomed hairstyle before the interview. Be aware that short always fares best in interviews.

Beard: A beard needs to be shaved off.

Mustache: Mustaches are a possible negative, but if you must, then at least make sure it is neat and trimmed.

Fingernails: Ensure that they are clean and trimmed.

Rings: Wedding or college rings are generally acceptable but other rings are not.

Earrings & piercings: Both earrings and visible body piercings should be taken out on the day of the interview.

Body odor & fresh breath: Make sure that you do not smell badly and chew some gum before the interview, yet never during the interview.

Perfume & cologne: Keep perfume and cologne to a minimum.

Briefcase: Take along a briefcase with a notepad and a pen for any notes you may have to take during or after the interview.

Realizing that this list is quite exhaustive, I still think that you should try to make effort to ensure your job interview attire resembles the one above. Remember, it is almost always better to be higher than the standard than lower. In the end, you are interviewing for your future so every additional effort that sets you apart from your competitors will benefit you eventually.

MAINFRAME COMPUTER

Tt refers to a class of ultra-reliable medium and large-scale servers designed for enterprise-class and carrier-class operations.

The first mainframe vendors were Burroughs, Control Data, GE, Honeywell, IBM, NCR, RCA and Univac, otherwise known as "IBM and the Seven Dwarfs." After GE and RCA's computer divisions were absorbed by Honeywell and Univac respectively, the mainframers were known as "IBM and the BUNCH."

The Vendors

For decades, IBM has been the dominant vendor in the mainframe business. Although many tried to compete by offering IBM-compatible mainframes, only Amdahl (Fujitsu) has remained as a competitor in this arena (see IBM-compatible mainframe). Unisys, Sun and others also make mainframe-class machines that typically run under a version of Unix or Linux.

There Is a Difference

One might wonder why mainframes cost a million dollars or more when the raw gigahertz (GHz) rating of their CPUs is not any higher than a PC costing 1,000 times less. Quite often in fact, the ratings are lower. Here are the reasons.

Lots of Processors, Memory and Channels

Mainframes support symmetric multiprocessing (SMP) with several dozen central processors in one system. They are highly scalable. CPUs can be added to a system, and systems can be added in clusters. Built with multiple ports into high-speed caches and main memory, a mainframe can address thousands of gigabytes of RAM. They connect to high-speed disk subsystems that can hold terabytes of data.

Enormous Throughput

A mainframe provides exceptional throughput by offloading its input/output processing to a peripheral channel, which is a computer itself. Mainframes can support hundreds of channels, and additional processors may act as I/O traffic cops that handle exceptions (channel busy, channel failure, etc.).

All these subsystems handle the transaction overhead, freeing the CPU to do real "data processing" such as computing balances in customer records and subtracting amounts from inventories, the purpose of the computer in the first place.

Super Reliable

Mainframe operating systems are generally rock solid because a lot of circuitry is designed to detect and correct errors. Every subsystem may be conPublish Posttinuously monitored for potential failure, in some cases even triggering a list of parts to be replaced at the next scheduled maintenance. As a result, mainframes are incredibly reliable with mean time between failure (MTBF) up to 20 years!