Eavesdropping: The Origin

The origin of eavesdropping can be traced to the English word eavesdrop. Eavesdropping refers to the act of listening to someone's conversation. This can be used to collect information about someone's private life. It's easier to spy on IP-based calls than TDM-based.

Eavesdropping is for passive recipients

Eavesdropping is the act of listening to conversations to gain information. The person listening may not know that they are being listened and they may not even be aware. The person eavesdropping might be a stranger or may have a purpose for listening in on conversations.

Eavesdropping is a technique of social network hacking which intercepts legitimate wireless communications occurring in open air. For example, an attacker might place an embedded Eve in an electronic device nearby. Because the operating frequency of the Eve is the same as that of Alice and Bob, the attacker would know how to intercept Alice's conversations.

It's simpler to make IP-based telephone calls than TDM based calls

The main difference between IP-based calls and TDM-based calls is their transmission technology. IP-based calls use IP networks to transmit voice data, while TDM uses traditional phone service. TDM-based call are more difficult to intercept than IP-based calls. Although IP-based calls are less secure, they are still cheaper. VoIP offers many benefits, including lower operating costs, better call quality and lower access fees.

IP telephony uses new logical network elements and protocols to carry voice calls. These elements can be used to manage, route, store, and transmit call information. They are also able to enable new business scenarios. Three basic business scenarios are possible with IP telephony

FAQ

These are five interesting facts about livers

The liver is responsible of breaking down toxins and storing nutrients. It also helps regulate blood pressure and keeps our body temperature stable.

We hear it all the time: "I feel sluggish today" or "my head feels heavy". These symptoms could indicate liver problems.

Common signs include yellowing skin, dark urine, fatigue, nausea and vomiting, weight loss, stomach cramps (yellow coloration), itching, and jaundice (yellow colouration). But these aren't the only warning signs. You should immediately consult your doctor if you have any of these symptoms.

The liver is a vital organ. It is vital for detoxification, metabolism, immunity, reproduction, and digestion.

1. The average adult liver weights about 1,400g.
2. At birth, the liver of a baby can be half as big as an adult's. It becomes about four times more large by the age of three than an infant's liver.
3. The liver can be found on the left side of your abdomen, just below the lower rib cage.
4. There are 16 major lobes of the liver. But there are also many smaller ones.
5. Red blood cells make up approximately 10 million of the liver's total.

What is the most fascinating fact about the human body

Two eyes, two ears, 2 nostrils, 4 limbs, 1 nose, 1 penis and one mouth are all there. We have over 50 parts of our bodies. However, one thing is missing. A heart.

A heart is a pump, which circulates blood throughout our bodies. The blood flows through the veins and arteries to carry oxygen and nutrients to the cells.

The heart pumps out approximately 5 liters of blood per minute. This is equivalent of an adult drinking 2 to 3 cups of coffee each day.

Blood flows through the heart 24 hours a day, 365 days a year. Your heart beats nearly 100 times a minute while sleeping.

Because of the color and texture of their skin, you can tell if someone is healthy or sick. Capillaries are tiny blood vessels visible on the skin's surface. These small vessels carry blood from the large blood vessel in the skin back towards the heart. The skin turns blue or violet when blood flow becomes blocked.

People with sickle cell disease lack red blood cells. They become very sick when their blood becomes hardened and sticky.

If you cut yourself, a bandage is applied to stop the bleeding. For wounds to heal properly, blood must flow. To do this, doctors will insert a needle through your skin into the vein adjacent to the injury. This allows blood drainage from the injury area.

Doctors also insert tubes (catheters) into the artery near the site where the blood clot forms. This keeps patients alive until the clot has broken up naturally.

How does your brain control your body's functions?

The brain relays messages to other parts of the body to ensure their functionality. Everything that happens within your body is controlled by the brain. It tells both your stomach and lungs what to do; it also controls your legs and arms.

Your brain is made up billions of nerve cell networks connected in groups known as neurons. Action potentials, which are electrical signals sent by neurons to each other via axons, allow them to communicate with one another. Each neuron has its own cell membrane around its nucleus. The membrane contains channels that allow ions like sodium and potassium to enter the cell and leave it. The electric charge that causes the neuron's fire is created by ion movement.

Neurotransmitters, which are chemicals that release neurotransmitters when a neuron fires up, can be found in the space between the neurons and the next one. Neurotransmitters attach to the receptors of the second neuron and open ions channels for ions to pass in and out. The second neuron also fires.

When a presynaptic nerve receives an impulse, neurotransmitter release takes place. The impulse travels along the synaptic pathway that connects both neurons. The transmitter binds to the receptors on the postsynaptic neural cell, which triggers the firing of that neuron.

The nervous system relies on neurotransmitters for communication. They coordinate activity between the different parts of your brain.

What is the most mysterious area on earth?

Antarctica is home to the most mysterious and remote place on Earth.

This is why we find it so captivating. Because it is unlike any place on Earth.

It is isolated, remote, and very hard to visit. It is not what you see.

You will also find some of the oddest wildlife species in this natural wonder.

Let's find out how this mysterious destination became so famous.

Antarctica: The South Pole

It is not known why Antarctica was called Antarctica. Some believe it means "land of ice." Others believe it comes out of Greek mythology.

Antarktis is the name Antarktis was given to an island in ancient Greece by Zeus' twin brothers. According to legend, one of the twins was born in winter. Hence, the word antarctic.

Others believe that the name is a combination of the Greek words anti and tropos which mean against and turn. This would translate to land that is turned away from the sun.

Whatever the reason Antarctica has held a special fascination for people, it is undeniable.

It is the highest, coldest, windiest, dryest, and most populated continent. Because it is too frigid, there are no trees, animals, or plants.

Yet, this frozen wasteland is alive.

It houses approximately 90% of all Earth's living organisms. There are about 50% of the world's animal, plant and plant species.

What is Antarctica? Here, water freezes in ice rather that vaporizing into the atmosphere.

This results in large masses of ice floating above the ground.

These glaciers cover more than 80% of the continent. They are growing in size every year.

Since 1960, the Antarctic ice sheets has grown 60ft.

The sea level will rise up to 200 feet if melting continues. It could result in massive flooding all over the world.

This does not mean that everyone is wrong. Some scientists suggest that global warming could actually be good for us. They claim that the melting of ice sheets could accelerate as temperatures rise. This would lead to flooding that removes tons of toxic chemicals and soil from our bodies.

Others cautioned that this theory sounds too science fiction.

Statistics

• The average human adult male heart rate is between 70 and 72 beats per minute, while the average for adult women is between 78 and 82 beats, which is significantly faster, according to 2014 published in the Journal of Clinical and Diagnostic Research. (romper.com)
• In fact, according to the American Academy of Ophthalmology, you make 15 to 30 gallons of tears each year, which is insane when you think about it. (romper.com)
• It might not sound like something that's truly plausible — and it is quite rare — but according to a 2015 study published in the Asian Cardiovascular & Thoracic Annals, it's possible to hurt yourself and even break a rib just by sneezing. (romper.com)
• In one 2014 study published in the Archives of Medical Science that sought to study the prevalence of these mites, research showed that 41% of the people had them hanging out in their eyelashes. (romper.com)
• Your mouth makes a lot of saliva every day It might seem like way too much, but your salivary glands typically produce anywhere from 0.5 and 1.5 liters a day, according to a 2009 study published in the Journal of Medicine and Life. (romper.com)

External Links

washingtonpost.com

• Here's how and why coyotes are growing so quickly.
• A short history of the White House's much-maligned electric horse

theguardian.com

• Humans shine in the darkness
• Japanese firms encourage their dozy workers to sleep on the job

youtube.com

• YouTube

nytimes.com

• The Claim: Some People only Dream in Black and White. The New York Times
• The Letters Warren G. Harding’s Family Wouldn't Allow You to See - The New York Times

How To

Hollywood Actors and Actresses with PhDs

The list of people who had PhDs includes many well-known names such as Stephen Hawking, Albert Einstein, Bill Gates, Steve Jobs, Oprah Winfrey, Michael Jordan, Barack Obama, and many others. Nikola Tesla and Marie Curie are among the many famous scientists.

Some stars have Ph.D. degrees including actor Tom Hanks and singer Barbra Streisand.

These stars all received their doctorate degrees at different universities around world. Many of these celebrities became successful business leaders and entrepreneurs after earning their PhDs.

Some of the other well-known actors and actresses who have PhDs include:

1. Actor David Schwimmer received an MBA at Columbia University Business School. He was also an alumni of NYU's Tisch Schools of the Arts.
2. Actress Jennifer Aniston graduated from Dartmouth College with her Bachelor of Science degree. Harvard University gave her her Master's Degree, in Organizational Behavior and Human Resources Management.
3. Julia Roberts, an actress, studied Biology at Yale University and then received her Masters of Public Administration degree from Georgetown University.
4. Actor Edward Norton graduated from Brown University with his Bachelors of Fine Arts. He then earned his Doctorate in Molecular Biophysics and Biochemistry from Stanford University.
5. Actress Maggie Gyllenhaal graduated from Barnard College with her Bachelor of Arts in English Literature. Columbia University gave her her Master of Social Work.
6. Actress Sarah Jessica Parker was awarded her Bachelor of Arts degree in psychology from Wellesley College. Columbia University awarded her a master's degree in clinical psychology.
7. Sandra Bullock, actress, received her Bachelor of Arts degree at the University of California Berkeley. After graduating from Cal Berkeley, she went on to earn her Masters of Education at UCLA.
8. Reese Witherspoon was an actress. She earned her Bachelor in Arts in Political Science degree from Tulane University. Her Master of International Affairs was then obtained from Tufts University's Fletcher School of Law and Diplomacy.
9. Michelle Williams, actress, graduated Wesleyan University with her Bachelor of Arts degree. After graduating from Wesleyan University, she went on to earn her Master of Arts in Psychology at Boston University.
10. Actress Shailene Woodley graduated from Brigham Young University-Hawaii with her Bachelor of Arts. She then went to graduate school for her Master's in Environmental Studies from San Francisco State University.
11. Will Smith is an actor who graduated from Howard University with his bachelor's degree as a Communications major. He went on to earn his Master of Business Administration at Northwestern University's Kellogg Graduate School of Management.
12. Queen Latifah was an actress who graduated from Michigan State University with her Bachelor of Science degree in Nursing. Her Master of Public Hygiene was then obtained from the University of North Carolina, Chapel Hill.
13. Amy Adams, an actress, graduated from Juilliard School with a Bachelor of Music degree. The Manhattan School of Music awarded her Master of Music degree.
14. Halle Berry, an actress, graduated from American Conservatory Theater with a Bachelor of Fine Arts degree. Carnegie Mellon University awarded her a Master of Fine Arts in Acting.
15. Actress Brittany Murphy graduated from Santa Monica High School with her Bachelor of Arts Degree in Theatre Arts. Then, she graduated from Santa Monica High School with a Bachelor of Arts degree in Theatre Arts. She received her Masters of Fine Arts (Acting) at New York Film Academy.