Wednesday, August 22, 2007

The Simplest Radio

Radio can be incredibly simple, and around the turn of the century this simplicity made early experimentation possible for just about anyone.
How simple can it get?
Here's an example:
Materials Reqd: A fresh 9-volt battery and a coin.
Procedure:
  • Find an AM radio and tune it to an area of the dial where you hear static.

  • Now hold the battery near the antenna and quickly tap the two terminals of the battery with the coin (so that you connect them together for an instant).

Result : A crackle in the radio, that is caused by the connection and disconnection of the coin, is heard.

By tapping the terminals of a 9-volt battery with a coin, you can create radio waves that an AM radio can receive!

Your battery/coin combination is a radio transmitter! It's not transmitting anything useful (just static), and it will not transmit very far (just a few inches, because it's not optimized for distance). But if you use the static to tap out Morse code, you can actually communicate over several inches with this crude device!

Monday, August 20, 2007

EGO

In psychoanalytic theory, the part of human personality that combines innate
biological impulses (id) or drives with reality to produce appropriate behavior.


Sigmund Freud believed that human personality has three components:

In his scheme, the id urges immediate action on such basic needs as eating, drinking, and eliminating wastes without regard to consequences.

The ego is that portion of the personality that imposes realistic limitations on such behavior. It decides whether id-motivated behavior is appropriate, given the prevailing social and environmental conditions.

While the id operates on the "pleasure principle," the ego uses the "reality principle" to determine whether to satisfy or delay fulfilling the id's demands. The ego considers the consequences of actions to modify the powerful drives of the id. A person's own concept of what is acceptable determines the ego's decisions.

The ego also must "negotiate" with the superego (conscience) in the often bitter battle between the id's drives and a person's own sense of right and wrong. Repression and anxiety may result when the ego consistently overrides the id's extreme demands.

Guilt

An emotional state produced by thoughts that we have not lived up to our ideal
self and could have done otherwise.

Guilt is both a cognitive and an emotional experience that occurs when a person realizes that he or she has violated a moral standard and is responsible for that violation. A guilty conscience results from thoughts that we have not lived up to our ideal self. Guilt feelings may also inhibit us from falling short of our ideal again in the future. Individual guilt is an inner reflection on personal wrongdoing, while collective guilt is a shared state resulting from group—such as corporate, national, or community—wrongdoing.

STAGES OF GUILT DEVELOPMENT

The researcher M. L. Hoffman has proposed the following stages of guilt development:
Infancy—Because infants have no clear sense of separate identity or the effect of their behavior on others, it would be impossible for them to feel true guilt over hurting another.
Early childhood—Young children understand themselves as physically separate from others, but do not yet have a deep understanding of others' inner states; therefore, they feel guilt over hurting another person physically, but not over doing emotional damage.

Middle childhood—With the increased understanding of others' inner states, children develop a sense of guilt over inflicting emotional pain on others or failing to act on another's behalf.
Adolescence to adulthood—Cognitive development now allows the young adult to perceive abstract, universal concepts of identity and suffering and, therefore, to feel a sense of guilt over more general harm, such as world hunger, poverty, oppression, etc.

Guilt serves as both an indicator and inhibitor of wrongdoing. Healthy guilt is an appropriate response to harming another and is resolved through atonement, such as making amends, apologizing, or accepting punishment. Unhealthy guilt, sometimes called neurotic or debilitating guilt, is a pervasive sense of responsibility for others' pain that is not resolved, despite efforts to atone. Healthy guilt inspires a person to behave in the best interests of him-or herself and others and make amends when any wrong is done. Unhealthy guilt stifles a person's natural expression of self and prohibits intimacy with others.

Unhealthy guilt can be instilled when a child is continually barraged with shaming statements that criticize the child's self, rather than focusing on the specific harmful behavior. A statement such as, "It is wrong to take someone else's things without permission—please return my book," creates an appropriate awareness in the child of healthy guilt for doing wrong. Saying, "Give me my book back! I can't trust you with anything!" shames the child, declaring that he or she is by nature untrustworthy and will never be better than a thief, regardless of future behavior.
Consequently, the child sees his or her identity as defective, and may feel powerless to atone for any wrongdoings. This identity can be carried into adulthood, creating a sense of debilitating guilt.

An important difference between shame and guilt is that in the former, a person does not feel he could have avoided the action; in guilt, he feels responsible. Guilt can be used to manipulate someone into behaving in a certain way. This is known as a "guilt trip." Provoking another's sense of guilt in order to obtain something that he or she might not otherwise have offered is a manipulation of internal motivations. If a woman tells her husband that she is going out for the evening with her girl-friends, and her husband responds, "Go ahead and go to the movie, dear … don't worry about me … I'll be fine here all by myself in this big old house all evening with nothing to do …, " the wife will be made to feel guilty for her husband's loneliness. If the guilt trip is heavy, the wife may decide to stay home with the husband, even though she really wants to go to the movie.

It is appropriate to let people know when they have unnecessarily or intentionally hurt others, or have ignored their responsibilities to others. This will instill fair guilt that will help a person be less hurtful in the future.

Although conclusive studies have yet to be conducted, it is likely that the sense of guilt changes along with a person's cognitive and social development. These stages have yet to be thoroughly documented and are still open to critique.

Guilt can be deactivated, the conscience "turned off." Some people never seem to develop a healthy sense of guilt in the first place, through a failure to develop empathy or a lack of appropriate limits, while others choose to turn theirs off. Guilt can be deactivated in two different ways:
1) The person convinces him-or herself that the act was not a violation of what is right.
2) The person reasons that he or she has no control over the events of life and is therefore not responsible for the outcome. With no sense of personal responsibility, there can be no sense of guilt.
When guilt is reduced, internal limits on behavior disappear and people can act without remorse.

Wednesday, August 8, 2007

10 Symptoms Not to Ignore


Take these not-so-obvious symptoms to your doctor.

From MayoClinic.com

Here's a list of warning symptoms worth reading. You may find some of the symptoms surprising. But, be aware of the significance of these symptoms and when it's important to seek timely medical care. It could make a difference in your quality of life and may even save your life.Trust that your body informs you of its needs. While some messages are more urgent than others, milder but persistent symptoms may also signal trouble.


1. Unexplained weight loss.

If you find you're losing excessive weight without intending to do so, see your doctor. Unintentional excessive weight loss is considered to be a loss of more than:
* 5 percent of your weight within one month
*10 percent of your weight within six to 12 months
An unexplained drop in weight could be caused by a number of conditions, such as an overactive thyroid (hyperthyroidism), depression, liver disease, cancer or other noncancerous disorders, or disorders that interfere with how well your body absorbs nutrients (malabsorption disorders).

2. Persistent fever

If you have a normal immune system and you're not undergoing treatment, such as chemotherapy for cancer, a persistent low-grade fever — over 100.4 F — should be checked if it lasts for a week or more. If you have a fever with shaking chills, or a high fever — greater than 103 F — or if you're otherwise severely ill, see your doctor as soon as possible.

If you have an immune system problem or take immune-suppressing drugs, fever may not be a reliable warning sign and your primary doctor or oncologist can tell you what would signal a need for an evaluation.

Persistent fever can signal hidden infections, which could be anything from a urinary tract infection to tuberculosis. At other times, malignant conditions — such as lymphomas — cause prolonged or persistent fevers, as can some medications and conditions, and reactions to certain drugs.

Fever is common with treatable infections, such as urinary tract infections. But if a low-grade fever persists for more than two weeks, check with your doctor. Some underlying cancers can cause prolonged, persistent fever, as can tuberculosis and other disorders.

3. Shortness of breath

Feeling short of breath — beyond the typical stuffy nose or shortness of breath from exercise — could signal an underlying health problem. If you ever find that you're unable to get your breath or that you're gasping for air or wheezing, seek emergency medical care. Feeling breathless with or without exertion or when reclining also is a symptom that needs to be medically evaluated without delay.

Causes for breathlessness may include chronic obstructive pulmonary disease, chronic bronchitis, asthma, heart problems, anxiety, panic attacks, pneumonia, a blood clot in the lung (pulmonary embolism), pulmonary fibrosis and pulmonary hypertension.

4. Unexplained changes in bowel habits

See your doctor if you have any of the following:
Severe diarrhea lasting more than two days
Mild diarrhea lasting a week
Constipation that lasts for more than two weeks
Unexplained urges to have a bowel movement
Bloody diarrhea
Black or tarry-colored stools
Changes in bowel habits may signal a bacterial infection — such as campylobacter or salmonella — or a viral or parasitic infection. Among other possible causes are inflammatory bowel disease and colon cancer.

5. Mental status changes

Immediate medical evaluation is warranted if any of the following occur:
>Sudden or gradual confused thinking
>Disorientation
>Sudden aggressive behavior
> Hallucinations in someone who has never had them
>Changes in behavior or thinking may be due to infection, head injury, stroke, low blood sugar or even medications, especially ones you've recently started taking.

6. New or more severe headaches (especially if you're over age 50)

Seek prompt medical attention if you experience:
*A sudden and severe headache, often called a thunderclap headache, because it comes on suddenly like a clap of thunder.
*A headache accompanied by a fever, stiff neck, rash, mental confusion, seizures, vision changes, weakness, numbness, speaking difficulties, scalp tenderness or pain with chewing.
*A headache that begins or worsens after a head injury.

These headache symptoms may be caused by stroke, blood vessel inflammation (arteritis), meningitis, brain tumor, aneurysm or bleeding on the brain after head trauma.

7. Short-term loss of vision, speaking or movement control

If you have these signs and symptoms, minutes count. These are signs and symptoms of a possible stroke or transient ischemic attack (TIA). Seek immediate emergency medical care if you have any of the following:
>Sudden weakness or numbness of the face, arm or leg on one side of your body
> Sudden dimness, blurring or loss of vision
>Loss of speech, or trouble talking or understanding speech
>A thunderclap headache
>Sudden dizziness, unsteadiness or a fall

8. Flashes of light

The sudden sensation of flashing lights may signal the beginning of retinal detachment. Immediate medical care may be needed to save vision in the affected eye.

9. Feeling full after eating very little
Feeling full sooner than normal after eating and having persistent nausea and vomiting that last more than a week are warning signs that should be checked by your doctor. There are many possible causes, including pancreatic cancer, stomach cancer and ovarian cancer.

10. Hot, red or swollen joint

These warning signs may occur with a joint infection, which requires emergency care to save the joint and keep bacteria from spreading elsewhere. Other causes may include gout or certain types of arthritis such as rheumatoid arthritis

Wednesday, May 2, 2007

Mashup

hehe.. a funny mashup of vettaiyadu vilayadu and james bond..
the guy who did this apparently vented out his frustation thus.
honestly, i liked the movie n i dont know wat the guy had to complain about ..

Saturday, April 21, 2007

aww..

love the colours !!
macaw feathers.. beauty eh ?

Friday, April 6, 2007

Purpose :

This blog has been created solely for the purpose of particularly nothing... :P its just a dump of colours and other nice stuff .. It may/may not contain copywrighted content. If in case some of your material is here, I assure you that i have in mind no commercial intentions.