Tuesday, September 29, 2009

What is that screechy sound produced when a cellphone is placed near a radio?

The loud static heard from the computer's speakers everytime the phone would receive a message or a call is due to electromagnetic interference or EMI. This is what happens when radio waves emitted by one device cause undesirable behavior in another. Thus, placing a cell phone near a computer may create network interference and a screechy sound or noise is often heard from the cell phone when it's trying to transmit or receive a signal.


What's the Buzz?Harnessing Static To Improve Wireless Signals.www.sciencecodex.com/whats_the_buzz_harnessing_static_to_improve_wireless_signals

Why does a cell phone produce a screechy sound when placed near a computer or a radio? www.sciam.com/article.cfm?id=experts-cell-phone-screeching

Wednesday, September 23, 2009

Cause of Hearing Loss

Sometimes, we may experience that some of our friends didn't hear us at all while talking to them. Maybe because they are experiencing hearing loss and according to my research, here are some of the causes why this problem occur.

There are a variety of the causes of hearing loss. For instance, some medications cause irreversible damage to the ear. This includes overdose of aspirin and chemotherapy for cancer. These have been found to inhibit prestin's functions. Evidences have shown that many cases of high-frequency hearing loss are caused by defects in the cell's molecular machinery that involves prestin And genetic mutations that have been detected in the prestin found in humans are reported to be associated with deafness.

But what is Prestin?

Prestin can amplify sound in the ear by converting electrical voltage into motion but it can also work in reverse. Prestin can produce electrical charges from tiny vinrations. Each protein is capable of generating nanowatts of electricity but combining many will be enough to power small devices or charge a battery.


Have you wondered how we hear sounds?www.smm.org/sound/nocss/activity/ssl8.htm
Ear Motor Helps Play Sound.www.sciam.com/article.cfm?id=ear-motor-helps-play-soun

Thursday, August 20, 2009

What makes paper-thin bulbs strong?

The glass of an electric light bulb is not much thicker than the paper of this page, yet it can endure a strong grip when you push into the bulb socket. The explanation for this lies mainly in the bulb's shape, which is based on the eggshell principle.

Why don't we get crushed even when a hen sits on the eggs to incubate them. The secrets lies on the egg's shape. That "egg shape" provides strength in the structure, which should withstand the all-round pressure even with a thin shell. If the shell is too thick, the offspring inside would not be able to peck its way out.

This characteristic was imitated when light bulbs were designed. The round and curved profile of the bulb allows the force you apply to be transmitted in all directions away from the point of contact. This makes the force to be distributed over a wide area and no excessive stress being set up at any one point.


Topic: Physics. http://en.allexperts.com/q/Physics-1358/bulb.htm
The Reader's Digest Assoc. Ltd., How Is It Done?. Why paper thin bulbs are so strong? (London:The Reader's Digest Assoc. Ltd.,1990),11.

Tuesday, June 23, 2009

Cholesterol:Is it one of the most dangerous substances in the body?

The body needs cholesterol, and not all forms of cholesterol are dangerous. Cholesterol comes from two sources: our body and our food. Our liver and other cells in our body make about 75 percent of blood cholesterol. The other 25 percent comes from the foods that we eat.

There are two types of cholesterol:good and bad. Too much of one type - or not enough of another can put you at risk for coronary heart disease., heart attack or stroke.

Low-density lipoprotein or LDL is known as bad cholesterol. High-density lipoprotein or HDL is known a the good cholesterol. When too much LDL cholesterol circualates in the blood, it can slowly build up plaque, a thick, hard deposit that can narrow the arteries and make them less flexible. This condition is known a atherosclerosis. On the other hand, high density lipoprotein or HDL cholesterol actually protects us from heart attacks.

Cells throughout the body use cholesterol to make a number of hormones necessary for growth and reproduction. When there is damage to the walls of the arteries or veins, the liver sends cholesterol through the blood to protect the tissue from hemorrhaging. Cholesterol is a component of all cell walls. They are viatal to proper brain and nerve function . LOw levels of cholesterol have been associated with deppression , anxiety and mood disorder. Cholesterol is also an essential ingredient of bile salts produced in the liver, used to emulsify fats and excrete fat-soluble toxins.


Bauman, Ed and Mclaughlin, Marsha. The Truth About Cholesterol.http://www.shareguide.com/cholesterol.html
Lee, Dennis. The Truth About Cholesterol. http://www.medicinenet.com/script/main/art.asp?articlekey=14419
LDL and HDL Cholesterol: What's Good and What's Bad?http://www.americanheart.org/presenter.jhtml?identifier=180
Bato Balani ISSN 0117-7052 Vol.28 N0.5 SY 2008-2009

Thursday, June 11, 2009

Do you think we need only calcium for bone development?

Some of us believe that we only need calcium for our bones. But on the contrary, we also need other vitamins and mineral to develop our bones. Magnesium and zinc can help calcium to make the bones more firm. Protein is necessary in bone development because it acts as the scaffolding of the bone, and aids in the production of the collagen, which makes our bones flexible and less susceptible to breakage. Without protein, calcium makes our bones strong but runs the risk of becoming brittle.

Vitamin C stimulates the enzymes that are responsible for the production of collagen and connective tissues. Vitamin K helps protein lock in essential bone nutrients. Vitamin D is essential in helping the body absorb calcium from our foods.

The key to making our bones essentially strong, is moderation and balanced diet. Different vitamins, minerals, and nutrients all work hand in hand to provide the body with what it needs to remain healthy at its peak.


No Milk? What About My Child's Bones? www.vegfamily.com/health/no-milk.htm
Annemarie Colbin. Beyond Calcium: Why bones need protein to be healthy.www.foodandhealing.com/calcium.htm
Just a Little Bit.www.nichd.nih.gov/publications/pubs/upload
Bato Balani ISSN 0117-7052 Vol.28 N0.3 SY 2008-2009

Saturday, June 6, 2009

Facts about Huffing

Huffing is a form of substance, wherein users intentionally inhale a chemical substance to achieve an altered mental state.

The four types of huffing agents are: volatile solvents, aerosols, gases, nitrites. These inhalants can damage the liver, kidney, brain and heart.

Do you know friends who huff?

Here are some of the characteristics that will tell you if they do:
  • disorientation and slurred speech
  • stains of paint on the face, hands or clothing
  • stash of empty spray paint or solvent containers and chemical soaked rags or clothing
  • strong odor of chemicals in breath or on clothing
  • nausea or lose of appetite
  • red or runny nose
  • sores or rash around the nose or mouth
Once upon a medical time, some huffing agents are first used as medical anesthetics. One good example is nitrous oxide, popularly known as laughing gas. Chloroform and diethyl either also fall under this category.

Because o these substances, psychoactive and hallucinogenic effects at sub-anesthetic levels, they were used recreationally. Sir Humphry Davy, a British chemist and physicist, used to hold nitrous oxide parties for people to enjoy the euphoric properties of the gas. It was then that Davy proposed for the gas to be used in operations, but this was done only half a century later. To date, nitrous oxide is used by dentists to reduce the anxiety of patients during visits..


Huffing: The Abuse of Inhalants.www.usdoj.gov/ndic/pubs07/708/index.htm
What Parents Should Know about Hufing.www.drgreene.com/21_180.htm

Thursday, May 28, 2009

why burp?

Have you ever experienced burping in the middle of a meal or in front of your friends eating and it's too late to cover up your mouth? It is so embarrassing, right?

But why do we burp?

Burps or belches are simply the sound of gas leaving your body.When eating, we are not just swallowing foods or liquids, we also swallow air at the same time. These air contain gases..and sometimes, they need to get out. Extra gases are forced to come out from the stomach to the esophagus and to the mouth as a burp.

Babies are also subject to accumulation of gas in the stomach while feeding, and this can cause considerable agitation and/or discomfort to the child unless it is burped. The act of burping an infant involves placing the child in a position conducive to gas expulsion (for example holding the infant up to the adult's shoulder, with the infant's stomach resting on the adult's chest) and then lightly patting it on the lower back so that he or she burps.


The Ins and outs of burping.http://www.kidzworld.com/article/756-the-ins-and-outs-of-burping
Why do I burped?http://kidshealth.org/kid/talk/yucky/burp.html
Belching. http://en.wikipedia.org/wiki/Burping

Saturday, May 23, 2009

One Lovey Blog Award

I would like to thank Ms. Gi-Ann of The Second Realm for passing this very lovely award to me. Again, I would say that I am very grateful to have many friends in the blogosphere(sorry for the term) that they have spend time reading my blogs and appreciate it. These appreciation gives me the courage to continue what I am doing.

I woud like to pass this on to my fellow bloggers who gave effort to their blogs, not just lovely but informative as well.