Titanium Step

How to do matrices on a TI-89 Titanium?

Can anyone please tell me how to:
1. Add /Subtract matrices
2. Multiply matrices
3. Solve augmented matrices (using rref)
using a TI-89 Titanium calculator

Please include a STEP BY STEP procedure! I got frustrated from reading the manual (which was no help) and trying to figure it out on my own. BTW I already know how to do these by hand, but our teacher wants us to know how to do them on the calculator and she doesn't know how to work a 89.

Also, please simplify because I'm noy good at following complicated procedures. Ten points to the one who does it best. THANK YOU!

I'm not sure about solving augmented matrices, but I know how to +/ -/ multiply.
When you go to the main menue and select matrices, select option three to make a new matirix. Create whatever matrices you want, and make sure you know their letter. Then go back to the main menue and go 'home'.
When you are allowed to do general calculations, type in a+b or a-b or a*b. It will solve whatever calculation you need (as long as you remeber to put in the right matrix letter!)
They really are awesome calculators!

Five Steps for Beautiful Skin From the Inside Out

You’ve heard the old adage that beauty is only skin deep.  The real beauty of glowing good health, however, goes much deeper than the surface of your skin and far beyond the colors or lotions you apply to your face or injections or surgery to battle the signs of aging.

The products you put on your skin are important to how your skin will look.  More important, however, are lifestyle factors that can affect your skin in the form of wrinkles, worry lines, discoloration, or a sallow complexion.  Sun, Smoking, Stress, Sleep, and Sustenance, or diet—the five S’s—are the easiest way to remember the most important components of health skin.

Protect Yourself from the Sun.   Excessive exposure to the sun is the single most damaging thing you can do to your skin.  Repeated tanning or sunburns damage the skin, and are the primary cause of wrinkles, discoloration and dark spots, and thick leathery skin.

The most important thing you can do to protect your skin from the sun is to wear a sunscreen every day with an SPF of at least 15 (higher is better), and that protects against both UVA and UVB rays.  Look for the ingredients Titanium Dioxide, Zinc Oxide, or Avobenzone (Parsol 1789).

You only need about 15 minutes of direct sunlight each day for your body to get adequate amounts of Vitamin D.  After those 15 minutes, any sun exposure you get only serves to age your skin prematurely.  The sun’s rays are strongest between the hours of 10 a.m. and 3 p.m., so avoid exposure during those hours, if possible.  Wear a hat and protective clothing if you’re going to be in the sun for any length of time, and don’t forget that the sun’s rays can reflect off the water, snow, or even concrete.

Quit Smoking.  Smoking is also extremely damaging to your skin for a variety of reasons.  First, smoking decreases circulation.  This means that the flow of blood, nutrients, and oxygen are decreased overall, but show up most dramatically on your face.  Decreased circulation is one of the causes of aging throughout your body.  Second, as a smoker, the continual motion of sucking on a cigarette creates deep creases around your lip area that are impossible to smooth with moisturizer or any other non-invasive techniques.

If you are a smoker, now is the time to quit.  If you are a non-smoker, it’s important for you to know that second-hand smoke is every bit as damaging to your health and skin as the act of smoking itself!

Deal With or Eliminate Stress.  Chronic stress shows up on your skin and face in a number of ways.  Stress and worry cause us to wrinkle our face in ways we would not under normal conditions.  This long-term worry can be imprinted on our faces.  For proof, just look at the face of any of our US presidents before they took office and the day they left office—they have aged dramatically. Some experts say that our presidents age about eight years for every four they serve in office.

Stress also causes the release of certain hormones into your bloodstream, which can cause inflammation, increase our cholesterol and clog your arteries.  What this means ultimately, is that stress can decrease circulation and impair your health, which will show up on your face.

The point here is if your life is chronically stressful, you need to find ways to deal with and eliminate the stress for the sake of your skin.  Some great ways to start are meditation, visualization, breathing exercises, or gentle exercise like Yoga, Tai Qi, or Qi Gong.

Get Enough Sleep.  Another S, Sleep is an important component to looking your best.  While everyone has different sleep needs, the average is about 7-8 hours a night for optimal health.  Your body heals itself and regenerates while you sleep.  Inadequate sleep will ultimately show up on your face as dark circles or puffiness under your eyes.

Sustenance—Eat the Right Foods to Look Your Best.  One of the most frequently overlooked components of skin care is diet.  What you eat affects the health of your body and skin, and without adequate nutrients, your skin can’t look its best. As important as your diet is how well you digest your food.  You can eat the healthiest foods in the world, but if you can’t digest them well, you will not absorb the nutrients that impact your health and make your face glow.

If you struggle with digestive problems, try to avoid very cold or raw foods, and instead choose soups, stews, and stir fried dishes.  Sit down and enjoy your meal, and take the time to really chew your food.  Eating fast foods on the run only serve to upset your digestion further.

Foods that benefit your skin include those that are rich in antioxidants, such as colorful fruits and vegetables and dark leafy greens.  Vitamin supplements for your skin should include a good multivitamin daily and supplementation with antioxidants, including Vitamins A, C, E, CoQ10, and B complex.

About the Author

Lynn Jaffee is a licensed acupuncturist practicing in Minneapolis, MN. One of her specialties is cosmetic acupuncture. Lynn is also the author of the book Simple Steps: The Chinese Way to Better Health. For more information and articles, visit her website at http://www.acupunctureinthepark.com or her blog at http://www.acupuncturetwincities.com

Titanium Step

Craftsman Battery

Craftsman 19.2 Volt Battery 1323501 for Cordless Tools

Craftsman Battery article

Bit Size

A thumb rule to select a drill bit for a specific internal thread size?

wat is common rule to select a drill bit size to drill a hole for a specific internal thread size............. for example i want to make M12 internal threads in a stainless steel rod which drill bit should i use to drill the hole and why to use it..........

As previous answerer says, best to use tables - e.g this one:

http://www.efunda.com/designstandards/screws/screwm_coarse.cfm

e.g. for M12, the tap drill size (i.e. hole needed for internal thread tapping) is 10.2mm.

This assumes you're using standard coarse metric taps (you probably are). An alternative set of threads - the metric fine series - also exists. There are, of course, all sorts of old imperial standards as well!

Frozen Synapse: Teaser Trailer #1

Bit Size

Titanium Step Drill

Chrissy Steltz moves one step closer to a face with implant surgery
Shooting victim Chrissy Steltz gets facial implants in three-hour operation. Surgeons installed eight titanium screws for securing a facial prosthesis.

Drill Bits

Drill Bits

Drill bits, the most important part of any drill machine is used to bore cylindrical holes in different materials like metal, wood, plastics, etc. As per your requirement you can make the choice of drill bits If you are looking for a few quick useful tools a set of steel twisted bits and a few masonry bits would be enough but if you are working on the floor then you would require bits which are larger and or designed for a specific purpose/material.

We come across many types of drill bits designed for a specific purpose. One such drill bits is the steel twist bits. The twist bits can be used for wood, plastic and similar material and are also useful while drilling metal sheets. The twist steel bits are mostly made up of either High Speed Steel or Carbon Steel. Both the drill bits serve a different purpose like the carbon steel drill bit is used for drilling wood and not metal. The steel twisted bits coated with Titanium Nitride (TiN) are also available. These drill bits exhibits a typical gold like color. This coating provides the drill bit more hardness and also a self-lubricating property. This bit should only be used for drilling metal and not any other material. As these bits are thin and brittle Special care should be taken when using the smallest. Always hold the drill square to the work and apply only light pressure when drilling.

You can use a drill sharpener, a grindstone jig or an oilstone to do this for sharpening the blades. Sharpening the blades or drilling areas regularly keeps the bits in shape and hence is cost effective. But while sharpening the twist drill bits Special care should be taken as titanium nitride coating can be destroyed. By forming a correct angle at the tip while drilling you can extend the life of the of your drill bit.

There are a variety of drill bits for different purposes. Some of them we can enlist here to give you a broad idea. The types of drill bits are:

Metal Drills

Ejector Drill

Core drill

Left-hand bit

Countersink bit

Indexable drill

Spade Drill

Trepan

Twist drill

Gun drill

Center drill

Wood Drills

Lip and spur drill

Spade bit

Brace drill bit

Auger bit

Gimlet bit

Step bit

Forstner bit

Hinge sinker bit

Adjustable Wood Bit

Other Materials

Diamond core bit

Masonry drill

Hole saw

PCB through-hole drill

Installer bit

About the Author

Looking for more information on Drill Bits check out www.drill-bits.biz your guide to Drill Bits.

Titanium Step Drill

Battery Ryobi
Charging cordless drill batteries?

Charging cordless drill batteries

I have a new Craftsman 12.0 volt drill with no charger and a Ryobi 12.0 volt drill with a charger look alot like the same drill but not perfectly i thought that maybe the Craftsman was maybe made for Sears by Roioibe but they don't fit the same in the charger .. what would happen if I made a set of jumpers to hook the Craftsman 12.0 volt drill to the Ryobi 12.0 volt charger will it work or will it go BOOM ??

Make sure the charger is the same output, some batteries take longer than others to charge, make sure the time requirement is the same.

Bring a Revolution to Your Home by Having Cordless Drills Around

With the arrival of some extremely light weight, potent and rechargeable batteries, a radical change has been brought to the way we usually perform our repairing works at home. Even many utility tool-makers have availed the maximum by this surge of batteries and launched the utility tools like cordless drills. Cordless drills bring a sense of convenience along as they lack cords, thus eliminate the tensions of a restricted reach. 

 

Home owners now have their choices with the companies like Ryobi, Skil, Craftsmen, Black & Decker to get what the exact needs call for. Professionals even boast of plenty with the firms like Bosch, DeWalt, and Hitachi to precisely serve their repairing and other common needs. 

 

Out of the available choices in cordless drills, DeWalt cordless drill is way ahead in terms of popularity. DeWalt has a reputation for presenting almost every sort of utility tool, and is dishing out the DeWalt cordless drills for more than a decade. 

 

The type of DeWalt cordless drill to be chosen differs with the nature of the project underhand, as there are many variations available. Cordless drills in general vary with their utility, functions, size, weight, power and so on. With the cordless drills, it's feasible to expect and get different speeds. Lower speeds will be better when working with the harder materials. Even you don't need to bother, as cordless drills have an adjustable clutch to support ever type of drill. 

 

Picking a drill with higher voltages might be a good bet, as you need change with times as the materials used change. So have the power to command any job with an impeccable ease and ability, while using cordless drills.

 

Thinking about the battery to be used in your cordless drills is a fine move, as the life of battery tends to differ with every drill. So giving a try to the cordless drills with two batteries has its own merits. This way, you can have one battery spare to be used later on while working with the first one to save you valuable time. 

 

With cordless drills gaining prominence in roughly all current woodwork, metalwork and construction works, possessing an electric drill turns out to be quite indispensable for all homes everywhere. The electric drills are even more in style than a manual drill and prove their utility by furnishing simplicity and expediency. 

 

With plethora of options in cordless electric drills to pick from, it's always suggested to get along with the brands rather famous. Moreover, identifying the usage ahead of buying cordless drills has many gains to be reaped while drilling.

About the Author

Smit Mathur is an expert for writting Articles and is currently working for Sydney Tools. For more information related to DeWalt cordless drill, Cordless drills, Drill, Electric drills, Electric power tools Please visit http://www.sydneytools.com.au/

Battery Ryobi