Tag: encyclopaedia

Posted in History & Literature

Charon’s Obol

Posted on by Jinavie

According to ancient Greek mythology, a person’s soul must cross five rivers to enter Hades’ underworld after death. Charon ferries souls across the first river, Acheron, also known as the river of pain. To use Charon’s services, one had to pay a silver coin (obolus). If one could not pay the fee, one could not cross the river and would circle the Earth for eternity. Thus, the ancient Greeks had a custom of putting a coin in the deceased’s mouth for their journey.

Even for something as unavoidable as death, Charon asks for money. This not only shows that the ancient Greeks had a good understanding of market economies, but also teaches us something important about capitalism.
Just as the reaper takes a fee, nothing in the world is free. A market is the most effective economy system that man has devised and no other system (especially communism) has overcome it. But we have a tendency to denounce corporations for only taking advantage of poor, helpless citizens. Although there is corruption in reality, corporations are still subject to the invisible hand and bound by the basic principle of capitalism, supply and demand.

We only see the negative sides of capitalism and decry Charon’s greed. “How could you ask a helpless soul for money? Is that not robbery?”, we cry. But such words can only be said by someone who has devised a better system than the market, or found a way to keep Charon well-fed. Instead of criticising the economy or policies, it is far more efficient to think of a way to improve the market system. Blindly criticising and trying to destroy capitalism like Karl Marx did will only result in splitting the world in two and cause everyone to starve to death.
The reason being, money is an invention as important as fire to mankind.

Posted in Psychology & Medicine

Couvade Syndrome

Posted on by Jinavie

A patient comes to a doctor complaining of the following symptoms: “I can’t sleep because my teeth have been aching for the past few weeks. My head is killing me and whenever I wake up in the morning my stomach hurts and I feel nauseous and want to vomit. Sometimes I have no appetite and sometimes I crave a certain food. My breasts have gotten bigger and my stomach is bulging quite a bit.”
The patient has been married for three years and in a few months will have a beautiful daughter.
What is the diagnosis?

Most people would immediately say “Pregnancy!”. But there is one small detail that was left out: the patient is a man.
It is common sense that men cannot be pregnant. So what is this man suffering from?

Couvade syndrome is also known as sympathetic pregnancy. In other words, the husband subconsciously copies his wife’s pregnancy and suffer the same symptoms. This syndrome can be severe enough to cause labour pains, nosebleeds and even post-partum depression.
The cause has not been established, but it is likely to be psychosomatic, where psychological symptoms are expressed through physical symptoms, or due to changes in hormone levels.

Posted in Science & Nature

Titanic

Posted on by Jinavie

Titanic is a film telling the story of the sinking of the eponymous ship, the RMS Titanic, directed by James Cameron in 1997. Most people are entranced by Leonardo DiCaprio and Kate Winslet’s excellent acting, the cutting-edge special effects and the waves of emotions that it projects to the audience, but there is another component that is just as amazing.
Most films and television shows tend to sacrifice science in the name of drama. Thus, science fiction movies are ironically quite inaccurate in even the most basic scientific facts. However, Titanic is strangely true to science despite being a drama film.

To start with, we can take the scene where Rose, embraced by Jack from behind, spreads her arms wide open like wings while on top of the stern of the Titanic. Here, Rose is seen standing so high that she is above the rails from the thighs up. In this position, even a slight push would cause her to lose balance and make her fall, causing the movie to end prematurely. But on closer inspection, it can be seen how Jack has his arms wrapping under the cables. To be so attentive to detail even in the moment of heated passion – Jack is surely a calm, cool-headed man.
In the scene where the Titanic is sailing, it takes 25 seconds for the ship to completely pass a point. Considering that the ship was 269m in length, this comes to a cruising speed of 38km per hour. This is 21 knots when converted – almost identical to the actual cruising speed of the Titanic which was 22 knots.

The movie is accurate in even finer details. Let us study the climactic scene of the sinking. When the ship is tilting at its highest point, a person took 4.3 seconds to fall and hit the water. This equates to a height of 91m, which can be achieved by a 269m ship tilting at about 40 degrees.
When Jack is bound by handcuffs, Rose bravely cuts the chain with an axe. But can a fair 18-year old girl summon such strength? If the chain is the thickness of two 5mm diameter metal rings, then the blade requires 49 Joules of energy to cut the chain. To achieve this, a 3kg axe must be swung at the speed of 20km/h, which is the same as dropping the axe from a height of 1.6m. Ergo, Rose can create enough energy simply by adding a little more strength to the axe as she swings it down from above her head.
Lastly, in the tragic scene where Jack sinks away, he disappears in 6.4 seconds. If by a rough estimate he sank about 2m, then it suggests that he descended at about 1/100 strength of free falling. This means Jack’s body density is about 1% greater than sea water. As the density of sea water is 1.04g per 1cm3, this is perfectly reasonable assuming that Jack is big-boned.

A film focussing on such fine scientific detail can certainly be called a masterpiece of the century. If only Rose’s voice did not echo in the final scene…

Posted in Psychology & Medicine

Insulin

Posted on by Jinavie

Diabetes is a common and serious disease that is caused by the body being unable to control the blood sugar (glucose) level, leading to severe organ damage. For example, blood vessel damage can lead to blindness, renal failure, heart attacks or strokes. Diabetes is divided into Type 1, caused by the destruction of pancreatic β-cells (that produces insulin) leading to insulin deficiency, and Type 2 diabetes, where insulin resistance renders the hormone useless. Thus, diabetes is a disease related to insulin. So what is insulin?

Insulin is a hormone that lowers blood glucose. It has the important function of controlling blood glucose levels after a meal. Therefore, a diabetes patient has high blood glucose, which has a toxic effect.
As type 1 diabetics cannot produce insulin, they require daily insulin injections. Some type 2 patients also need insulin. But this hormone that saves the lives of diabetics also has a deadly dark side.

Too much insulin leads to hypoglycaemia due to its blood glucose lowering properties. This is the opposite of what happens in diabetes, but is even more dangerous. Although there are in-built autonomic defence mechanisms to prevent this from happening, a high level of insulin can overcome this to cause blood glucose to plummet. 
A hypoglycaemic patient initially suffers cognitive dysfunction, then sweating and tremors. As blood glucose falls further, the patient begins to convulse, until they fall into a coma and eventually die. This is because the brain heavily relies on glucose for its functions, and a disruption of glucose supply causes it to shut down.
Because blood glucose fluctuates much like blood pressure, it is hard to control. This leads to many diabetics accidentally falling into hypoglycaemia, or even losing their lives. Furthermore, insulin is sometimes used by people to cause hypoglycaemia as a means of suicide.

If you see a person convulsing, check around for any hypodermic needles or bottles of insulin. A diabetic patient would have a medic alert bracelet, and if it is a suicide attempt they would have recently injected themselves with insulin. If you think it is hypoglycaemia, you must immediately treat the patient as severe complications can occur in a very short time. The emergency treatment is quite simple – raise the blood glucose. For example, dissolving a spoon of white sugar in the patient’s mouth or making them drink a sugary drink such as apple juice can cause a spike in blood glucose, causing the symptoms to disappear. If their consciousness does not return, you may need to repeat the process until their blood glucose is high enough.

Knowing even a little about insulin and hypoglycaemia may lead to you saving a person’s life someday.

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Posted in History & Literature

Failure

Posted on by Jinavie

When inventing the light bulb, Thomas Edison succeeded after more than 2000 experiments. A young reporter asked how he felt every time he failed, over and over.
Edison replied: “Fail? I have never failed. I have merely taken two thousand steps to invent the light bulb.”

You have never failed. You are just taking the steps to success.

Posted in Psychology & Medicine

Toxoplasmosis

Posted on by Jinavie

There is a protozoan parasite called Toxoplasma gondii. This parasite infects many animals through an interesting route. 
The first victim is a mouse. An infected mouse loses its fear of cats, leading it to play fearlessly in front of one until it gets caught and eaten (was Jerry a mouse with toxoplasmosis?). It is unclear how it controls a more advanced animal’s brain, but thanks to this effect, Toxoplasma gondii can infect its intermediate host – a cat.
An infected cat starts excreting parasite eggs with its faeces. If a person forgets to wash their hands or eats food contaminated with cat faeces, they can be infected and become the final host for the parasite.

Usually, Toxoplasma gondii cannot overcome the healthy immune system, but it can infect those with a weaker immune system such as the elderly or pregnant women. Furthermore, it is part of the TORCH complex (toxoplasmosis, rubella, cytomegalovirus, herpes) – a group of infections that commonly cross over from the mother to the fetus in utero. Symptoms are normally flu-like, but if more severe it can cause dysfunction of the eyes, brain and other vital organs. Sometimes it lies dormant until the person’s immune system is weakened, whence it becomes active. Toxoplasmosis is also a possible cause of a miscarriage or infertility.

One fascinating symptom of toxoplasmosis is psychiatric disorders. Because Toxoplasma gondii can infiltrate the brain, it is known to cause depression or even schizophrenia. As cats are the most common intermediate host, cat owners are more susceptible to toxoplasmosis. Because of this, there is a theory that “crazy old cat ladies” are in fact toxoplasmosis patients.

Posted in History & Literature

Flower Language

Posted on by Jinavie

Roses are the most common flowers used in modern society to profess one’s love. However, many people do not know the true meaning behind each flower. For example, every colour has a different meaning for roses.

  • Red rose: true love, passion
  • White rose: eternal love, innocence
  • Black rose: death, farewell
  • Yellow rose: friendship, jealousy, betrayal
  • Pink rose: grace, gratitude, youth
  • Mix of red and white roses: unity

As seen from above, a rose can mean love, friendship or even separation. It is also important to note that roses are traditionally given as a bouquet of one, six, dozen or any multiple of six. 
The following is a list of common flowers and what they symbolise:

  • Acacia: secret love
  • Bellflower: thinking of you
  • Cherry blossoms: beautiful mind, purity
  • Chrysanthemum: peace, love, mourning (used in funerals)
  • Cosmos: forever, devotion
  • Daffodil: Chivalry, respect, unrequited love
  • Daisies: innocence, modesty, beauty
  • Edelweiss: memories of an important person
  • Hibiscus: rare beauty
  • Lavender: silence, devotion
  • Lilac: memories of youth, first love
  • Lily: innocence, chastity, purity
  • Magnolia: unrequited love
  • Pansies: memories of love
  • Sunflower: happiness
  • Tulip: declaration of love (red), hopeless love (yellow), broken heart (white)
  • Violet: faithfulness

Posted in Life & Happiness

Progressive Muscle Relaxation

Posted on by Jinavie

Everyone goes through a tough time at least once in their lives. As modern life is ideal for stress to build, it is easy to get weighed down by fatigue and negativity. Pent-up stress is the cause of all ill health and one cannot lead a healthy life without overcoming their stress.
Although everyone has a unique method of overcoming stress, there are some very effective generic methods of stress relief. Some examples include hobbies, laughter yoga and meditation, but the method that will be introduced here is progressive muscle relaxation, or PMR.
PMR is very simple and doesn’t take up much time, making it a useful way of relieving stress for busy people.

  1. Sit back comfortably, close your eyes and rid yourself of all thoughts.
  2. Breathe in slowly and deeply and then breathe out. Concentrate on your breathing.
  3. Relax all the muscles in your body into a jelly-like state.
  4. Squeeze both hands into a fist as hard as possible for 5 seconds, then release.
  5. Rest 5 seconds and then repeat twice more.
  6. After three cycles of contraction and relaxation, repeat with your arm muscles.
  7. Apply the same three cycles on your feet, legs, abdomen, chest, neck and head.

The key principle of PMR is achieving complete relaxation by concentrating all your energy into one spot then releasing it. Furthermore, concentrating on your slow breathing has a meditation effect, resting both your mind and body. Once you are relaxed from head to toe, you will feel all the fatigue in your body disappear.
There is no greater enemy than stress. Therefore, it is best to have your own defence mechanism against it, but it also very useful to know a few general methods.

Now, try the progressive muscle relaxation on yourself to resolve all the stress that accumulated over the day.

Posted in Philosophy

Least Common Multiple

Posted on by Jinavie

The most common experience every people on Earth have with animals is with an ant. There are plenty of people around the world who have never seen a cat, dog, bee or snake. However, it is hard to meet someone who has never played with some ants once or twice. Interacting with ants is an experience that is common to all of us.

When observing an ant walking across our palm, we can find these basic facts:
Firstly, an ant moves its antenna to find out what is happening.
Secondly, an ant goes any where it can go.
Thirdly, if you block the path of an ant, the ant crawls on top of that hand.
Lastly, if you draw a line in front of ant with a wet finger, you can stop it in its tracks. The ant hesitates as if there is an invisible wall and eventually goes around it.

There is no one that does not know these facts. But this basic, childish knowledge that is shared between us and our ancestors is never used in our lives. Schools do not teach it as it has no practical use in finding a job. What we learn in school about ants is simply boring. Who would honestly find memorising the various parts of an ant’s anatomy fascinating?

(from The Encyclopaedia of Relative and Absolute Knowledge by Bernard Werber) 

Posted in History & Literature

Darkness

Posted on by Jinavie

When you close your eyes, what do you see? When you look into the night sky, what do you see? Most people describe darkness as pitch black, but this is not quite true.
The colour that we see in perfect darkness is not black, but more of a dark grey colour. This colour has a special term called eigengrau, which is German for “intrinsic grey”. Similarly, when you look into the night sky the actual colour is a deep navy.

The reason for this is that the brain uses relative contrast to determine true black rather than the absolute brightness. So when you see darkness, the optic nerve still fires off some signals that the brain interprets as eigengrau. When you see a black object, the brain compares it to the surrounding to cancel this effect out to see true black.

The night sky is lit with stars and the moon, giving it a darker colour than eigengrau due to contrast, while retaining the blue hue produced by the dust diffracting light in a particular manner. Because of this, ninjas actually wore dark navy clothes instead of the black that we associate with them in the present.

An interesting point regarding darkness is that people often see it as a symbol of the negative side (e.g. The Dark Side). However, darkness is technically the opposite of light. It is in fact defined by the absence of light, which in other words suggests it is the default state.

The default state of the universe is nothing.