Secondary Technical School of Industry and Secondary Vocational school of Machinery ... více

Computers and Computer Networks The computer is a tool which caused a revolution among scientific, technological and commercial fields all over the world in the second half of the 20th century.  The computer age started in the early 50’swith calculators, which in the beginning were very big and only executed a few arithmetic operations. Nowadays you have personal computers of a small size, which make long and complex operations in only few seconds, Types of computers Computers can be devided into five main types. These are: mainfraimes, desktop PCs, notebooks, tablet PCs and personal digital assistants (PDA). ... více

Electric circuits and components An electrical device that provides a path for electrical current to flow is called an electric circuit. Atoms A basic unit of matter consisting of a dense, central nucleus surrounded by a cloud of negatively charged electrons is the atom. The atomic nucleus contains a mix of positively charged protons and electrically neutral neutrons. The electrons of an atom are bound to the nucleus by the electromagnetic force. Likewise, a group of atoms can remain bound to each other, forming a molecule. An atom containing an equal number of protons and electrons is electrically neutral, otherwise it has a positive or negative charge and is an ion. Anion is an atom with extra electrons or with a deficiency of electrons, resulting in its being electrically charged. An ion with extra electrons is negatively charged and is called an anion, an ion deficient electrons is positively charged and is called a cation. ... více

Christmas in UK, USA, CR Christmas = international holiday. The name Christmas comes from the words Christ and mass (Kristus a mše) Christians celebrate Christmas Day as the anniversary of the birth of Jesus of Nazareth The history of Christmas dates back over 4000 years. Many of our Christmas traditions were celebrated centuries before the Christ child was born. It can be dated back to the early Mesopotamians The exact day of the Christ child′s birth has never been pinpointed In 350 AD Bishop of Rome, Julius I, choose December 25th as the observance of Christmas. By 1100  Christmas had become the most important religious festival in Europe ... více

1.    Materials and Semi-finished Products Used in Engineering (slovní zásoba v sekci slovíčka) When something needs to be created, there are many different materials to choose from. The materials can be divided into two main groups: Metallic and Non-metallic materials. ... více

2. Machining (slovní zásoba v sekci Slovíčka) Machining is the process of removing material from a workpiece to achieve desired shape and size. The material is cut by sharp cutting tools (lathes, milling machines, drill press) into the form of chips (also called swarf) Machining is a precise procedure compared to forming, molding and casting. It is necessary where high degree tolerances on dimensions and high-quality finished products are required. ... více