What is Bulimia ? Described and classified by British psychiatrist Gerald Russell in 1979, Bulimia comes from a Greek word meaning voracious hunger. Bulimia is a severe, life-threatening psychological eating disorder, described by the ingestion of an abnormally large amount of food in a short period of time, followed by an attempt to avoid gaining weight … Leer más
What is Biography ? The word biography comes from the Greek words bios, which means «life» and graphia, which means «writing». A biography is a description of a real person’s life, which includes details of events as well as stories from the person’s life. Biographies generally include information about the subject’s personality and motivations, and other types … Leer más
What Does ENGINEERING Mean ? If we want to know the etymological origin of the word engineering that now occupies us, what we have to do is to leave, metaphorically speaking, until the Latin, because we will discover that this term comes from the Latin word ingenium. A term that can be translated as «to … Leer más
Origin and History of the Sweet Potato The sweet potato has a rich history and an interesting origin. It is one of the oldest vegetables known to mankind. Scientists believe that the sweet potato was domesticated thousands of years ago in Central America. After his first trip to the Americas in 1492, Christopher Columbus brought the … Leer más
What is the Bourgeoisie ? The bourgeoisie is defined as the middle class of society: the social class of skilled workers, entrepreneurs and professionals, and government officials. The bourgeoisie is the oppressive class, which Karl Marx argued would be destroyed in the workers’ revolution. Specifically, the bourgeoisie was the class that controlled the means of production, … Leer más
Definition of Bulling The definition of Bulling is when an individual or a group of people with more power repeatedly and intentionally cause harm or injury to another person or group of people who feel powerless to respond. Bulling can continue over time, is often hidden from adults, and will likely continue if no action … Leer más
Definition of Phase in Electricity In electrical phase it is the expression of relative displacement between waves that have the same frequency. There are two different ways of looking at phases. First, it is when the voltages are out of phase with each other, as with three-phase power, and second, when the voltage is out of … Leer más
What is Anthropology ? The word anthropology dates back to the end of the 16th century, but it was not until the 19th century that it was applied to the academic discipline that now bears its name. In the United States, this field of study is generally divided into four distinct branches: physical (or biological) anthropology, … Leer más
Definition of Static Electricity Static electricity can be a nuisance or even a danger. Hair-raising energy can also damage electronic devices and cause explosions. However, properly controlled and handled, it can also be a great blessing to modern life. «Electric charge is a fundamental property of matter». Almost all electric charge in the universe is carried … Leer más
The Cell Phone: Its Definition Cell phone or mobile phone, is a portable device to connect to a telecommunications network in order to transmit and receive voice, video or other data. Mobile phones generally connect to the public switched telephone network (PSTN) through one of two categories: cellular phone systems or global satellite phones. A … Leer más