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Sunday, May 31, 2009

SKIN EFFECT, PROXIMITY EFFECT, AND LITZ WIRE


Skin effect is the tendency for high-frequency currents to flow on the surface of a conductor. Proximity effect is the tendency for current to flow in other undesirable patterns---loops or concentrated distributions---due to the presence of magnetic fields generated by nearby conductors. In transformers and inductors, proximity-effect losses typically dominate over skin-effect losses. In litz-wire windings, proximity effect may be further divided into internal proximity effect (the effect of other currents within the bundle) and external proximity effect (the effect of current in other bundles) [14], [15]. However, the distinction is useful only as a form of bookkeeping. The actual losses in one strand of a litz bundle are simply a result of the total external field, due to the currents in all the other strands present. Another approach to calculating the loss in a litz winding is to look at it as a single winding, made up of nN turns of the strand wire, each with current i/n flowing in it, where n is the number of strands, N is the number of turns of litz wire, and i is current flowing in the overall litz bundle. The loss in the litz winding will be the same as in the equivalent single-strand winding as long as the currents flowing in all the strands are equa

Lemon Juice and How to Get Rid Scars Naturally

Lemon juice is a tried and true remedy to fade scars. Add lemon juice to your current moisturizer or dab it directly onto the scar with a cotton ball. Apply the lemon juice twice a day, making sure to use a natural sun block to ensure that the sun does not darken the scar.

Cocoa Butter


Cocoa butter is also worth a trying to learn how to get rid of scars naturally. Like lemon juice, cocoa butter must be applied daily for its healing benefits. For years, pregnant women have used cocoa butter to eliminate stretch marks, and it works for scars as well.

Lotions for Skin Care


A number of breakthrough lotions formulas are being released in the market. There are different variants of bath lotion for dry skin, oily skin, and normal skin. There is also what's is called milk bath skin lotion That every one can use to maximize that nourishing effect. Choosing the lotion for your skin is essential to ensure that perfect glow. Just know your skin type and match it with the lotion you are to buy. You can never go wrong with that Bath lotions are the ones that are supposed to use right after you took a shower. This is the type of lotion you need to apply if you stayed in the tub too long that wrinkles are showing in your fingers and toes. These lotions replace the essential oils that are normally washed off every time you take a bath. Plus, it also helps in maintaining the skin's moisture. This is exactly how a bath lotion for dry skin works.

FIVE SIGNS OF SKIN CANCER

The five signs of skin cancer are very important to keep in mind. With the growing number of people being diagnosed with skin cancer, it is important to know as much as possible about this serious skin care problem. The statistic on skin cancer page provides some skin cancer statistics. Like other types of cancer, early detection is extremely important for successful treatment and the five skin cancer signs are keys in being able to detect skin cancer. Of course, these skin cancer signs are only the preliminary stage of a diagnosis. A proper diagnosis of a skin cancer problem can only be made by a physician and with proper testing being performed. Nevertheless, the five signs of skin cancer are an effective way to initially diagnose a possible skin cancer problem.
The five skin cancer signs involve examining the Asymmetry, Border, Color, Diameter, and Elevation of moles or skin growths. The signs can easily be remembered by using the first part of the alphabet – ABCDE.
Asymmetry means irregular shape. Dividing the mole in half with an imaginary line, the top half should look very close to the bottom half or the right side the same as the left side if the mole is normal or benign. Therefore, benign or non-cancerous and non-malignant moles are usually symmetrical or look the same on both sides of the dividing line. If the mole is irregular in shape and both sides do not compare well then this is an indication of a possible skin cancer problem.
Border refers to the outside edge of the mole or spot. A normal or benign mole or growth has smooth and even outer borders. A problematic growth has borders that are described using many different terms such as notched, jagged, scalloped, poorly defined, uneven, or even blurred. In summary, these terms are simply describing an irregularity or lack of smoothness in the borders of the mole or growth.
Color is also one of the five signs of skin cancer. In this case, look for whether the mole has an even color or hue. If the mole has more than one hue, then this could be a cause for concern. Benign growths are generally one color, hue, or shade. Brown is often the normal color, but not always. Cancerous moles can have shades of black mixed into shades of brown or tan. Dashes of red, white, and blue may also appear as the cancer progresses.
Diameter or the size of the mole or growth is one of the five skin cancer signs to be aware of. If the growth is larger than 6 mm or a quarter of an inch, then medical attention should be pursued. In relative terms, the eraser on the end of a pencil is about 6 mm in size. Of course, it is less likely, but possible that growths smaller than this size can be cancerous. Any mole growing in size is a concern and should be examined by a medical professional.
Completing the five signs of skin cancer is the property of elevation. This last of the five skin cancer signs refers to how smooth the growth is and that it is raised above the normal skin’s surface. Benign moles are generally flat and do not change in size over time. Cancerous moles change in height at a fairly rapid rate. A mole that is elevated and is not smooth (scaliness, erosion or oozing, crusting, ulceration or bleeding may be present) should be classified as suspicious. This final skin cancer sign is sometimes also referred to as evolution – the mole is evolving into something else and possesses some or all of the properties described above.
If there is any doubt about whether your mole is experiencing changes as described in the five signs of skin cancer, it is a good idea to visit a dermatologist as soon as possible to ensure there is no skin problem. As mentioned previously, early detection is essential for successful treatment. prenenting skin in this first place is the best treatment of all.

The Obagi Nu-Derm Skin Treatment Program


emphasizes correction and stimulation of the skin, which leads to regulating and strengthening skin functions to produce collagen, elastin, and healthier skin cells. This leads to smooth, firm skin with even color tone for a younger healthier looking skin.It has been extremely effective in treating both men and women of all ages and skin types and skin colors, including Asian, Hispanic and African American skin tones.