Things you don't know about Colors

Do you know that : Women and men have different seen for the red color :

Researchers from Arizona State University found that there is a specific gene responsible for the view and interpretation of the red color , this gene is located on the X chromosome , that's why women see the red color different from men.Do you know that Pink is a palliative color :That's why they splash the walls of the prisons and mental health care with pink.Do you know that yellow color makes you hungry:
It is not recommended to use yellow or orange colors in kitchen since they are considered as a appetite simulators.Do you know that blue color is the most common favorite color all over the world:forty percent of people around the world choose the blue color as their favorite color. While the 60 percent others choose the rest of the colors.
Do you know that green is called the color of the brain !!!

The Black Hole

Black holes are regions that have a very strong gravitational pull. Black holes cannot be detected through a telescope; they can be detected through their gravitational effects on other bodies.

Black holes are of three types: intermediate black holes, stellar black holes, and super massive black holes.
Intermediate black holes are black holes of mid sizes. Super massive black holes have small sizes; they are billions of times as massive as the sun. Stellar black holes have large sizes.
Black holes pull energy as well as matter. There exist a huge super massive black hole in the middle of the Milky Way galaxy. It is ok to observe the effects of black holes from a far distance , they are dangerous only if you get close to them .They are spherical and there is no tunnel at their centers , also not all of them are black , where some of them emit radiation .
As time passes, black holes lose their mass by radiating photon particles a so they vanish and evaporate.

Facts About Our Brain

The most important part of our bodies is the brain . So let's see some facts about our brains.

• If the oxygen was stopped in the brain from five to ten minutes , a  permanent brain damage will occur. 

• Human brain develops until the age of 40.

• 20% of the total blood and oxygen of all the body is used by the brain.

• 60% of the brain is fat .

• The brain waves is increased by the smell of chocolate .

• Alcohol doesn't lead to forget facts , but it makes the brain unable to create memories temporarily.And it takes only 6 minutes for its cells to react with alcohol.

• There is no left brain / right brain divide. It is a myth .They work together.

• Scientists found that our brains treats rejection like a physical pain.

• If half of the brain was removed by a surgery , no apparent effects on memory or personality appear.

• Babies need so much sleep , since they can use up to 50% of the total glucose supplied.

Water jet

A water jet , is an instrument used for cutting metals through water . Water is released from the water jet in a very high pressure , it is directed toward the metal through an extremely narrow nozzle keeping the spray coherent. A water jet can cut a metal , a stone , plastic, wood, ceramic, glass , stainless steel , granite and marbles.A water jet machine is composed of a catcher tank , high pressure pump , abrasive water jet nozzle , abrasive  hopper , articulated cutting head , X-Y traverse system , and a PC based controller.

The abrasive water jet nozzle is used for dissipating energy resulting from the abrasive jet . The X-Y traverse system is used for moving the nozzle to cut the material .

A water jet can cut a thick piece of soft materials. It is used for cutting materials that are sensitive  to high temperature resulting from cutting mechanism in other machines .It can be used in every industry . Water jet is the fastest and the most  accurate cutting machine in the world.

Chocolate Addiction

Does chocolate addiction exist?

 

We crave chocolate sometimes due to emotional states rather than hunger. People who eat a lot of chocolate describe them selves as Chocoholics . Serotonin is released when the person eats chocolate making him happier . That's a cause for eating chocolate .Dr. John Hoebel did an experiment on rats , he found that rats that were fed with sugar are becoming anxious when they removed sugar . Rats had the same symptoms as people addicted on nicotine or morphine . He also found that eating chocolates releases pleasure chemicals in the brain explaining why people feel happier after eating chocolate.Researchers at the University of Tampere in Finland also showed that chocolate addicted people have higher anxiety and negative moods in the absence of their daily chocolate dose.Researchers also found that people who restrain themselves from eating chocolate are actually increasing their desire for eating it.Therefore, chocolate addiction really exist . So pay attention before being a Chocoholic !!

Avicenna

Avicenna (known as shaikh-al-Raees) was born in the village of Afshana in the vicinity of Bukhara (in what is now Uzbekistan) in 370 AH (980 AD). Avicenna had many researches concerning his educational points of view. His famous works are on philosophy and medicine.

Avicenna sees that the aim of education is to achieve the physical, mental and moral growth of an individual. As a result, his education included physical development (exercise, food, drink, sleep and cleanliness). Besides, Avicenna’s point of view in education was to make the upright citizen (in body and mind) and prepare him for his craft in the society.

In addition, he stressed on group education. He believed that children should learn and train along with their peers since it has more benefits that learning alone. Such benefits include ethical education, mental growth and social education. He said: “it is appropriate for the child to be with the other children of elites with good manner and pleasant habits in a school because a child learns from a child”.

Avicenna believed that forming habits and manners begins since infancy period. In addition, health, hygiene, education and teaching should be taught at the very early stages of the child. He stressed that the teacher should be a role model since the students will be affected by him as well as by the people who are in direct relation with him (nannies, classmates, playmates, etc...).  In two words, the student will not receive information alone but also values, manner and morals from his instructor.

Regarding the teacher’s manner, Avicenna said: “Teacher should keep the child away from bad deeds and make him choose good friends, sometimes encourage and sometimes threaten him and if the threatening did not work then punish him. Be a moderate teacher, means not being so strict that the child does not dare to pose a question or ask for an explanation and not being so mild that the child becomes so bold and ignorant to the teacher’s statements and orders or to degrade them. The teacher must know the child and evaluate his nature and talents and examine his intelligence so he can choose an art and a career which is appropriate for the child’s talent and intelligence, consider the child’s enthusiasm in choosing an art and make him get accustomed to earn a livelihood through an art or a career that he has learnt”

Avicenna divided knowledge into two major categories. The first category is the theoretical knowledge and the second one is called practical knowledge. He believed that theoretical knowledge is implemented by practice. With respect to theoretical knowledge. He said it was composed of three kinds of sciences which include: natural sciences, mathematical sciences and metaphysical sciences. While practical knowledge included ethics, household management, public management, and prophetic science.

Al-Farabi

Al-Farabi was born in Vasige village in Turkmenistan in 870 AD. His views and theories were influenced by two main sources: Religion of Islam and Greek philosophy. He established logic within Islamic culture, that’s why he is known as the “Second Teacher”. “He believed that the first aim of knowledge was knowledge of God and his attributes, a knowledge which has a profound effect on the human being’s moral conduct and helps him to find the way to the ultimate aim of his existence.”

Al-Farabi’s main aim of education was to prepare the individual from an early stage to become a member of the society and to achieve the goal for which he was created. He believed that the main purpose of humanity existence is to achieve happiness, which is the highest perfection. Unlike Avicenna who considered that physical development is crucial for knowledge. Al-Farabi considers that education is founded upon the basis of inherited knowledge (the knowledge that the human possess the moment of birth).

Al-Farabi demonstrated certain methods in learning. One method was the repetitive method which was appropriate in teaching ethics and arts. While the other method was “learning by heart” which includes learning words and expressions that the student memorize, such as learning the Quraan, language or songs. Al-Farabi was asked which method in learning was better, understanding or memorization so he  replied: “ Understanding is better than memorization, because the action of memorization deals mainly with words and expressions, in other words with details, which could go on forever and are hardly useful, neither for individuals nor for classes. But the action of understanding concerns meanings, universals and laws- defined matters, finite, and which are valid for all…”

With respect to the teacher-just like Avicenna- Al-Farabi believed that the teacher must not be too severe, nor excessively gentle. If he is too severe, his students will hate him. At the contrary, if he is too lenient, his students will not take him seriously nor will pay attention to his lessons. Thus, the teacher should be in moderate position, which allows him to manage his students. He should be of a good character, “free from cravings and seek only the truth”.

Concerning the student, he should possess three qualities: he should be able to comprehend concepts and understand their meaning; accept the existence of what he understood; be able to describe what he has comprehended. He calls these three points “the modes of teaching” and he considers that the person who brings together these points is indeed a teacher.

Al-Farabi believes that the student should be always excited to learn and study. In addition, he should not let anything distract him from learning. In case the student wants to learn a book by himself, he should begin by learning the book’s purpose and structure, then its relationship to sciences and its relative position on that branch of science.

With respect to the curriculum, Al-Farabi is considered the first Muslim to classify the sciences and learning. He thinks that the sequence of learning must begin with learning language. This allows the student to express himself properly thus understand others and develop properly. He believes that learning language is the foundation for all other kinds of knowledge. Then comes “logic” which includes verbal expressions and mental processes.

After logic comes mathematics. He believes that mathematics is the basic tool for natural sciences, optics and astronomy. Al-Farabi divided mathematics into seven parts: “numbers (arithmetic), geometry, the science of perspectives, scientific astronomy, music, dynamics and the science of machines”.  Mathematics also includes algebra. After mathematics comes natural science, theology, political science, jurisprudence and academic theology.