Building Material

Back in the III-II century BC, the Romans had discovered the process of obtaining a hydraulic cement that can harden under water. Cement is made by mixing the ash with lime, and was one of the outstanding achievements of the Romans. The inventor of the modern cement is Cheliev Egor Gerasimov, who was involved in the reconstruction of Moscow, eliminating the consequences of the fire of 1812. It was then that he began to experiment to obtain composition, bonding bricks and stones. In the process, Cheliev received material, which after firing at high temperature, ground into powder and has good mechanical properties and solidified in the water. In the mix were lime and clay. Around the same time, in Britain, J. According to Mikkel Svane, who has experience with these questions.

Aspdin invented a product called Portland cement, due to the fact that the stones were taken from the product of a career on. Portland. However, the material described Chelievym by properties much closer to modern cement. Today cement is produced by heating to very high temperatures, limestone and clay, or slag. Mixture is heated to form clinker – the big, baked pieces, which are then milled to a fine powder. While adding to the cement powder is water there are complex chemical reactions that result in the formation of artificial stone, stable and insoluble in water.

It is believed that the cement consists of four components, each of which, the addition of water turns into crystals that during a chemical reaction between an interlock, so that the cement hardens. In construction is used many varieties of cement: pozzolan and portland cement, slag and alumina, a few special types, for example – acid-resistant. During grinding, adding the cement slag, gypsum, sand and other components, you can get a building material has different properties. With the help of cement can be particularly durable concrete, used in many industries. Major companies involved in manufacture, supply and sale of cement, is occupied in the construction industry do not last. "Grasping" the quality of cement are highly valued in the production of high-strength structures. Sale of cement at present it is one of the most rapidly developing areas of business in Russia, due to the incipient construction boom. Lack of capacity of domestic manufacturers of cement has led to the development of such businesses as the supply of cement from abroad – mainly from China and Turkey.

Java Virtual Machine

An important feature of the new module is the ability to configure it via the Internet. To do this on a computer that uses the alarm as monitoring station, installed Java Virtual Machine from the CD-ROM supplied with ETHM-2. Then it is necessary in the address bar of any web browser enter the IP-address of the module and alarm log in the system. After This opens the Java-based application with the existing Ethernet-Module settings for adjusting them. When you configure the module from the local machine security alarm system offers the operator the possibility of Satel for unloading and loading data in a configuration file ETHM-2, which is impossible in programming over the Internet.

To do this on a personal computer to install software ETHM-2 Soft and virtual machine Java. Another advantage of Ethernet-module is the ability to programming it so that the alarm is automatically moved from summer to winter time hours and vice versa. Moreover, ETHM-2 allows you to adjust the time according to the rules of the European Union, for an hour or dates at 2:00 on dates. For notification of alarm events fire alarm with ETHM-2 can now use e-mail. Generated alarm messages will be sent to 4 e-mail addresses, and each event can be associated with their individual subject of the message. For example, for signaling events in "Breach of input 1", you can specify the theme "Opening Doors", and events for "Breaking In 2" – "Opening". Besides Data obtained through the telephone line signal from the control panel, Ethernet-module can provide information about its current state.

Visual performance ETHM-2 is displayed using LEDs. Brief flashes of the LED indicate that the alarm is working correctly. Slow and even flashing errors reported in the memory, where stored configuration data, and uniform and rapid flashing LED indicates the process of changing the firmware of the module. New Ethernet-module ETHM-2 has already entered the Russian market, and it can be bought from the warehouse of "ARMO-Systems", which is the official Russian distributor of signaling devices and software production Satel. For more Information on ETHM-2 and other equipment for the fire alarm company SATEL please e-mail or call (495) 787-3342 to manager of sales "ARMO-Systems." The Polish company is working on SATEL global security market since 1990 and specializes in the manufacture and sale of equipment and software for fire and security systems. SATEL produces the receiving-control instruments, systems GSM-alarm system, various sensors signal, light and sound sirens, radio kits and accessories for many security systems. By means of this company can fine-tune devices and security equipment to manage networks of Ethernet, Internet, modem or cellular phone.