Perhaps the greatest theoretical achievement of physics in the 19th century was the discovery of electromagnetic waves. The first hint was an unexpected connection between electric phenomena and the velocity of light.
Electric forces in nature come in two kinds. First, there is the electric attraction or repulsion between (+) and (-) electric charges. It is possible to use this to define a unit of electric charge, as the charge which repels a similar charge at a distance of, say, 1 meter, with a force of unit strength (actual formulas make this precise).
But second, there is
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Posted by Jay Roberts at 06:39 AM | Permalink
People not familiar with magnetism often view it as a somewhat mysterious property of specially treated iron or steel.
A magnetized bar has its power concentrated at two ends, its poles; they are known as its north (N) and south (S) poles, because if the bar is hung by its middle from a string, its N end tends to point northwards and its S end southwards. The N end will repel the N end of another magnet, S will repel S, but N and S attract each other. The region where this is observed is loosely called a magnetic field; a more specific look at the concept of "field" is provided in a later section.
Either pole can also attract iron objects such as pins and paper clips. That is because under the influence of a nearby magnet, each pin or paper clip becomes itself a temporary magnet, with its poles arranged in a way appropriate to magnetic attraction.
But this property of iron is a very special type
of magnetism, almost an accident of nature!
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Posted by Jay Roberts at 06:30 AM | Permalink
They say you are supposed to live and breath what you do - But is this too much ??? You tell us.....
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Posted by Jay Roberts at 05:56 AM | Permalink
35C His & Hers "Lean" magnetic bracelet at only 1/16 inch wide efficiently crafted from 316L stainless steel "works" for him or her. We have carefully and precisely embedded powerful 3300 gauss laser point neodymium magnets in each and every link for one narrow and powerfully capable magnetic bracelet.
Sure we "guarantee” two strokes off your golf game when wearing an Acemagnetics.com magnetic bracelet but we also feel very confident that the compliments you'll get on or off the course will help you win points in other ways too! Read full story
Posted by Jay Roberts at 04:26 AM | Permalink
34C "Double Happiness" is 1/2 inch wide and one "Manly" piece of stainless steel magnetic jewelry. We have embedded two 3000 gauss neodymium laser point permanent magnets in each link creating one very powerful bracelet. Sure we "guarantee” two strokes off your golf game when wearing an Acemagnetics.com magnetic bracelet but we also feel very confident that the compliments you'll get on or off the course will help you score in other ways too!
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Posted by Jay Roberts at 04:15 AM | Permalink
Tim Harlow, general practitioner1, Colin Greaves, research fellow2, Adrian White, senior research fellow3, Liz Brown, research assistant4, Anna Hart, statistician5, Edzard Ernst, professor of complementary medicine4
1 College Surgery, Cullompton, Devon EX15 1TG, 2 Peninsula Medical School (Primary Care), Exeter EX2 5DW, 3 Peninsula Medical School, Tamar Science Park, Plymouth PL6 8BX, 4 Peninsula Medical School (Complementary Medicine), Exeter EX2 4NT, 5 Lancashire School of Health and Postgraduate Medicine, University of Central Lancashire, Preston PR1 2HE
Correspondence to: T Harlow, Hospiscare, Dryden Road, Exeter EX2 5JJ email@example.com
Objective To determine the effectiveness of commercially available magnetic bracelets for pain control in osteoarthritis of the hip and knee.
Design Randomised, placebo controlled trial with three parallel groups.
Setting Five rural general practices.
Participants 194 men and women aged 45-80 years with osteoarthritis of the hip or knee.
Intervention Wearing a standard strength static bipolar magnetic bracelet, a weak magnetic bracelet, or a non-magnetic (dummy) bracelet for 12 weeks.
Main outcome measures Change in the Western Ontario and McMaster Universities osteoarthritis lower limb pain scale (WOMAC A) after 12 weeks, with the primary comparison between the standard and dummy groups. Secondary outcomes included changes in WOMAC B and C scales and a visual analogue scale for pain.
Results Mean pain scores were reduced more in the standard magnet group than in the dummy group (mean difference 1.3 points, 95% confidence interval 0.05 to 2.55). Self reported blinding status did not affect the results. The scores for secondary outcome measures were consistent with the WOMAC A scores.
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Posted by Jay Roberts at 01:15 AM | Permalink
Alternative Methods for Pain Reduction
Alternative medicine and complementary therapy are no longer terms used solely by the granola-eating crowd. The search for alternatives to conventional medicine, especially within the realm of pain relief, has been gaining momentum. Whatever the reason—from the health-threatening side effects of popular pain medicines like Vioxx®, to a desire to use only natural remedies—the chase is on for new therapies to alleviate the pain of chronic illness.
Magnet therapy can be traced back to the third century A.D. when Greek physicians prescribed magnetized rings to treat arthritis. Theories about how magnets work range far and wide, yet research has not conclusively proven their efficacy. Still, the popularity of magnet therapy persists—in the form of magnetic bracelets, shoe insoles, belts, and bandages, with one survey ranking it second in CAM therapies used by arthritis and fibromyalgia patients.
Scientific research has produced some promising, if not conclusive results. In a study led by Candace S. Brown, PharmD, 32 patients with chronic pelvic pain were given either active or placebo magnets attached to their abdomens. Changes in pain relief and disability were calculated using three pain measurement tools. The patients who received active magnets for four weeks experienced less pain. The researchers point out, however, that the active group was more likely to identify their treatment, affecting the blinding efficacy of the study.
In a study out of Harvard Medical School, researchers enrolled 29 patients with osteoarthritis of the knee to see if magnet therapy could relieve their pain. Subjects received a sleeve equipped with either an active or a placebo magnet initially to be worn for four hours in a hospital setting. Patients were also instructed to wear their sleeves for six hours a day for the next six weeks. In this study, the researchers found improvement in pain among the magnet-wearers at four hours, but the relief was not sustained at weeks one or six.
According to the American Pain Foundation, complementary and alternative medicine (CAM) is growing at a rate of 15% each year, with more than $24 billion spent on therapies outside conventional medicine. In large part because of this growth, the government established the National Center for Complementary and Alternative Medicine in 1991, an organization whose charge is to investigate promising unconventional medical practices.
It’s important to note that while complementary medicine and alternative medicine can often refer to the same types of treatment, they are employed differently. Complementary medicine refers to treatments that are combined with conventional medicine, while alternative medicine replaces conventional medicine.
Chronic pain—pain lasting longer than six months—can be brought on by many conditions, but the major contributors are arthritis, cancer, back pain, migraines, and neurogenic pain (nerve pain). Various CAM therapies have been used to alleviate pain, including acupuncture, magnet therapy, chiropractic therapy, local electrical stimulation, brain stimulation, relaxation therapy, certain herbs, hypnosis, and biofeedback.
Despite the fact that acupuncture is thousands of years old, only recently has its effectiveness in relieving pain been studied. Acupuncture works on the premise that the body is made up of twelve main meridians, or energy pathways, and that disease develops when there is an internal imbalance of the body’s energy. In acupuncture, hair-thin needles are inserted into the skin at specific areas to increase the flow of energy throughout the body.
In a recent study, researchers led by Jorge Vas from the Pain Treatment Unit in Dos Hermanas, Spain, analyzed the efficacy of acupuncture in treating osteoarthritis. Ninety-seven patients with osteoarthritis of the knee were randomly split into two groups. Half received acupuncture and diclofenac (a prescription NSAID), while the rest received diclofenac and placebo acupuncture. Placebo acupuncture was given by using retractable needles that didn’t puncture the skin. The researchers found that acupuncture, as a complementary therapy, was more effective than just pharmacological treatment in reducing pain and rigidity, as well as improving physical functioning, in osteoarthritis sufferers.
In another, smaller study, Kenneth D. Phillips, PhD and colleagues studied the effect of acupuncture in relieving peripheral neuropathy pain in 21 HIV-infected individuals. Acupuncture was performed on the subjects a total of ten times over five weeks. The needles were inserted according to individual symptoms. The results showed significant reduction in pain, and reduced symptoms of peripheral neuropathy. The researchers concluded that acupuncture can successfully treat the symptoms of pain and neuropathy in HIV-infected individuals, and that further research is warranted.
Chiropractic therapy is a hands-on therapy that uses manipulations to the spine to help the body function better. Neck and back pain are the most common reasons for chiropractor visits. While adjustments or manipulations are the major therapies used by chiropractors, other mediums such as heat and ice, ultrasound, electrical stimulation, magnetic therapy, and exercise may be used to supplement the treatment plan.
As for pain relief, back pain has been the most studied in terms of chiropractic therapy. In a randomized clinical trial conducted by Hurwitz et al, 652 patients with low-back pain received either conventional medical care or chiropractic care. At the end of six months, the researchers found that conventional medical care and chiropractic regimens were comparably effective in reducing pain intensity and disability.
Medicine, whether conventional, alternative, or complementary, is not an exact science. As our understanding of CAM therapies grows, so does our ability to employ additional alternatives to treating chronic pain. Perhaps a combination approach based on the individual patient will prove to be the most effective medicine. For now, talk to your physician and decide together what’s best for you.
Brown CS, Ling FW, Wan JY, Pilla AA. Efficacy of static magnetic field therapy in chronic pelvic pain: A double-blind pilot study. American Journal of Obstetrics and Gynecology. 2002;187:1581-1587.
Complementary and alternative medicine are on the rise in America. American Pain Foundation website. Available at: http://www.painfoundation.org/page.asp?file+documents/doc_050.htm. Accessed: February 9, 2005.
Get the facts: acupuncture. National Center For Complementary And Alternative Medicine website. Available at: http://www.nccam.nih.gov/health/acupuncture. Accessed: February 9, 2005.
Hurwitz EL, Morgenstern H, Harber P, et al. A randomized trial of medical care with and without physical therapy and chiropractic care with and without physical modalities for patients with low back pain: 6-month follow-up outcomes from the UCLA low back pain study. Spine. 2002; 27:2193-2204.
Phillips KD, Skelton WD, Hand GA. Effect of acupuncture administered in a group setting on pain and subjective peripheral neuropathy in persons with human immunodeficiency virus disease. The Journal of Alternative and Complementary Medicine. 2004;10:449-455.
Research report: about chiropractic and its use in treating low-back pain. National Center For Complementary And Alternative Medicine website. Available at: http://www.nccam.nih.gov/health/chiropractic/index.htm. Accessed: February 11, 2005.
Research report: questions and answers about using magnets to treat pain. National Center For Complementary And Alternative Medicine website. Available at: http://www.nccam.nih.gov/health/magnet/magnet.htm. Accessed: February 11, 2005.
Vas J, Mendez C, Perea-Milla E, et al. Acupuncture as a complementary therapy to the pharmacological treatment of osteoarthritis of the knee: randomized controlled trial. BMJ. 2004;329:1216-1219.
Wolsko PM, Eisenberg DM, Simon LS, et al. Double-blind placebo-controlled trial of static magnets for the treatment of osteoarthritis of the knee: results of a pilot study. Alternative Therapies in Health and Medicine. 2004;10:36-43.
Last reviewed February 2005 by Rosalyn Carson-DeWitt, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
Posted by Jay Roberts at 07:05 AM | Permalink
When this big ole ball we call the earth turns out to be one BIG magnet it is no wonder people study it in AWE. Who knew magnets and those who love to study and experiment with them have been given the Nobel Prize ..... More than once!!
Take a look....
http://education.magnet.fsu.edu/curriculum/maglab_alpha/maglabalpha/html/library/nobel.html Read full story
Posted by Jay Roberts at 04:02 AM | Permalink
What are magnets?
Magnets can be made by placing a magnetic material such as iron or steel, in a strong magnetic field. Permanent, temporary and electromagnets can be made in this manner.
Background information for MagnetsCan we help you? Below you will find some commonly asked questions about magnets and magnetism. You may also want to explore the other topics relating to «An Invisible Attraction»
What are some uses of magnets?
The atoms forming materials that can be easily magnetized such as iron, steel, nickel, and cobalt are arranged in small units, called domains. Each domain, although microscopic in size, contains millions of billions of atoms and each domain acts like a small magnet. If a magnetic material is placed in a strong magnetic field, the individual domains, which normally point in all directions, gradually swing around into the direction of the field. They also take over neighboring domains. When most of the domains are aligned in the field, the material becomes a magnet.
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Posted by Jay Roberts at 03:06 AM | Permalink
On July 10, 2005, the Suzaku (formerly Astro-E2) spacecraft successfully launched from the Uchinoura Space Center in Japan. Suzaku is a collaborative project between the Japan Aerospace Exploration Agency (ISAS/JAXA), and NASA Goddard Space Flight Center.
Suzaku is an astronomy spacecraft used to monitor X-rays emitted by stars, galaxies, and black holes. To complete its mission, Suzaku uses several X-ray detectors, including one called the XRS
In order for the XRS to operate correctly, its microcalorimeter must be kept at temperature of 60 millikelvin. An adiabatic demagnetization refrigerator (ADR
) with a Cryomagnetics' superconducting magnet installed is used to achieve the ultralow temperature required by XRS. This is believed to be the first superconducting magnet application in space. Click here to read more....
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Posted by Jay Roberts at 02:48 AM | Permalink
So? What's new in the wonderful world of magnets and that big world around us these days? It's funny how all of a sudden when you start to look at a subject like magnets how amazing they really are. For example take a look at the following link talking about "Magnets" and the possible use by this major air carrier ... Read full story
Posted by Jay Roberts at 10:17 PM | Permalink