For example, pulling straight out on a piece of taffy will stretch the taffy due to applied stress. For example, pushing on the middle of a tennis racket string will bend the string due to applied strain.
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One-sentence summary -- Note that material stress is caused by axial stretching force. Understand that material strain is caused by shearing force perpendicular to the axis of the material.

Q: Some patients are advised to take prescribed or over the counter medications or supplements to augment their levels of hemoglobin. Supplements may include:  20-25mg of iron per day. This stimulates the production of hematin. 400mcg of folic acid per day. This is taken to increase the production of red blood cells which transport hemoglobin. 50-100mcg per day of vitamin B6. This functions also to increase red blood cell production. 500-1000mg per day of vitamin B12. It is prescribed to enhance red blood cell count. 1000mg per day of vitamin C. It is administered for red blood cell production as well. Erythropoietin is a hormone manufactured by the kidneys to promote the development of red blood cells by the bone marrow. Once the kidney cells sense that the oxygen level in the blood is too low it produces and releases erythropoietin to stimulate the bone marrow to generate more red blood cells. The increase in red blood cell count can also enhance the capacity of blood to carry oxygen.  In general, erythropoietin functions mainly to encourage the production of red blood cells and instigate the synthesis of hemoglobin (a component of the red blood cells that are in charge in transporting oxygen) . Erythropoietin is administered either through the veins or via subcutaneous (external, fatty portion of the legs and thighs) injection. Blood transfusions are sometimes recommended by health care providers to improve hemoglobin count.  Prior to transfusion, safety precautions are taken to ensure the quality and compatibility of blood. It is tested for signs of contamination which can cause adverse reactions to patients. Donated blood can contain infectious components for HIV/AIDS and hepatitis so proper screening is very important. After a thorough examination, the blood transfusion is given. It is administered through a central venous catheter or intravenous line in the arm over several hours. The patient is then watched carefully for any untoward signs of blood transfusion such as difficulty of breathing, itchiness or rashes and an increase in body temperature.
A: Talk to your doctor about taking supplements to increase your hemoglobin count. Talk to your doctor about getting erythropoietin injections. Consider getting a blood transfusion if your hemoglobin levels are very low.

Article: Combine 1/4-cup of olive, avocado, sunflower, or almond oil and 1 tablespoon of conditioner in a glass container. If you have long hair, double this recipe. Place the glass container in the water for two to five minutes, until hot but not burning.
Question: What is a summary of what this article is about?
Make a homemade hot oil treatment to repair damage from smoke, dust, and other pollutants. Boil a pan of water and remove from heat. Apply to damp hair, especially to damaged ends. Cover with a shower cap and stand in a warm shower for five to 20 minutes. Remove the shower cap and rinse your hair.

Problem: Article: Even if you're careful to take every precaution, your cookware may rust. Cast iron cookware is made to last, so rust can usually be successfully removed. If your cookware is very rusted, doing a vinegar soak can help remove rust and restore the pan.  Mix equal parts white vinegar and water. Make enough to fully submerge your pot and pan. You can soak the pan in a bucket or in your sink. Check the pan about once an hour. As soon as most of the rust is gone, you should remove the pot or pan from the vinegar. If you let cookware soak after the rust is gone, the vinegar will eat into the cast iron surface. Once you remove the pot or pan, rinse and dry before storing again. While soap should rarely be used on a cast iron pan, it can be helpful for scrubbing out any rust left after a vinegar soak. Use a mild detergent and warm water to scrub out any remaining rust. Never put cast iron cookware in your dishwasher. A green scrub pad or steel wool would work well. Once you've scrubbed out any remaining rust, dry the pan completely. A vinegar soak will remove the cookware's seasoning. You should re-season your pan after removing rust. Re-seasoning methods do vary based on the type and size of cookware, so you may want to do some research first. However, many types of cast iron cookware can be re-seasoned with aluminum foil and oil.  Place a piece of aluminum foil in the oven and then preheat to 350 degrees Fahrenheit. Rub vegetable oil over the entire pot or pan. Set the pot or pan upside down over the foil. This will catch any oil that drips down during cooking. Let the cookware bake for an hour, and then cool for 45 minutes.
Summary: Soak the pan in vinegar. Scrub out any lingering rust with soap. Re-season the pan.

INPUT ARTICLE: Article: For heavier letters, grab double sided mounting tape, large Velcro strips, or another thick, durable adhesive. For medium-weight letters, try Command strips or a similar resealable fastener. For small letters, you may be able to use sticky tack or a generic brand of tape.

SUMMARY: Choose an adhesive based on the size and weight of the letters.

Article: For the ultimate in nasty, zombie nails be sure you find the right color of pallid green to use as your base coat.  Other polish considerations include red (for blood), black (for bruising and dirt), white, yellow and even purple. Consider using a uniform color such as green or yellow to achieve the full effect. Unlike the skull nails, zombie nails are messy and dirty, so your nail art should represent this.  Consider painting splashes and splatters of red (blood) on some nails, creepy eyeballs and stitching on others. For example, cover your hand, exposing only one finger and go for the blood splattered look with red polish. Or use a dotting tool and a toothpick to create a bulging eye with blood oozing.  Remember--there are no hard and fast rules on these nails, the grosser the better!
Question: What is a summary of what this article is about?
Gather a multitude of nail polish colors. Paint your base coat and allow it to dry before you add your design. Plan how your zombie nails will appear. Use a variety of tools to achieve your look.