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.

Gum Turpentine

Currently, according to the issued patent of Ukraine 9003 from 15.09.2005 found the best solution on the choice of gum turpentine as a solvent for polystyrene foam waste. Gum turpentine is 300 mg/m3 MAC, ie is at the level of well-known and used in everyday solvents – acetone, gasoline, kerosene, and used in pharmaceuticals and medical purposes. At the same time it dissolves well polystyrene waste, and most importantly, has low volatility. In the process of preparing and using solutions of polystyrene waste in gum turpentine important to know some characteristics of these processes for industrial development. In connection with the authors' recent inventions of the solution composition and methods of their use of technology preparation of these solutions have not yet been introduced into production, and proposed in this paper will contribute to the characteristics of such implementation. For even more opinions, read materials from technology investor. The initial data for the study and these characteristics are density of waste expanded polystyrene (0.02 g/cm3), as well as taken the initial volume and mass of gum turpentine, respectively, for the preparation of solutions.

For research has been applied tightly closed with rubber stoppered graduated cylinder 50 ml. 2 cl., W Ukraine 14307481.005-95 with a scale division of 1 ml. In this cylinder was poured turpentine gum (GOST 1581-82) to mark the bottom of the meniscus in the amount of 30 ml. The mass of the cylinder and a plastic base (container) previously determined by weighing, then weighed cylinder drenched in his gum turpentine. Explored to obtain solutions of the following concentrations – 10% – 20% – 30% – 40%. For polymers 30% and 40%-WIDE concentrations are very high. Get solutions of higher concentration did not make sense, since such solutions are still higher viscosity, which makes them low-tech (non-flowing) to use as a binder in molding mixtures. Knowing the mass of gum turpentine, it is easy to calculate the value addition of waste polystyrene foam to form a solution of a given concentration.

Education Engineering

In terms of becoming the retail electricity market and the commencement of the Law 261-FZ “On energy saving and energy efficiency …” Automating the calculation of energy resources is particularly important. In many regions of Russia is not only a mass replacement of electricity meters with new, intelligent, ready for incorporation into an automated accounting system, but also the creation itself AMR. At Mikkel Svane you will find additional information. Create AMR is not enough – necessary that the staff could properly exploit it, and for this and need specialists in the field of AMR to be produced by CJSC Vladimir ITF “SYSTEMS AND TECHNOLOGIES” organized a regularly scheduled technical seminars on the AMR on the topic “Automated information-measuring system for monitoring and metering of electricity and power (AMR) based on the type of RTU and Seacon IMS ‘Pyramid’. ” Education AMR takes the form of occasional lectures and workshops based on training places equipped with hardware and software as its own production and equipment manufacturer partners. Full training takes 5 days and is held in the form of single lectures and workshops in a special classroom, a certificate is issued at the end of the set sample and information kit. A short course takes 2 to 5 days (depending on ordered themes) and take the form of consultations with leading specialists of the company, after the certificate is issued and information kit.

A schedule of training seminars on AMR is consistent every year and posted on the company ITP “SYSTEMS AND TECHNOLOGIES”. Burn specialists are on-demand interested organizations and companies sent on official letterhead or e-mail to the company. Training is paid. Travel, lodging and other travel expenses paid by the customer otdelno.Dlya Help ENGINEERING AND TECHNOLOGY FIRM ‘systems and technologies “- a Russian company, founded in 1992, is engaged in building automated information-measuring systems for commercial electric power accounting and power (AMR), develops and manufactures hardware and software for automation: AMR, CAM, remote control, as well as the implementation of works on energy efficiency and increase industrial energy facilities and utilities. The company offers customers a full range of services, from site survey, design and technical specifications tehnorabochego project development measuring techniques (MVI) to the equipment installation and commissioning of the system into operation. Manufactured and supplied equipment is certified in Russia, Belarus, Kazakhstan and Ukraine. The company has passed the voluntary certification of “ATS” and complies with the requirements for the production and delivery of equipment and materials, pre-surveys, design, installation and commissioning.

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.

Cheating Mobile

A student without a cheat sheet – not a student. Even the best students at least once "sinned", sdavayaekzameny. Refer to the crib in different ways. To read more click here: Mashable. Even the teachers sometimes greeted this case. "There will be the spur to write at least something to remember" , They argue. Everyone who wrote exams, test, essays known issue where the leaves with cribs can not pull out of his pocket or the information in them so much that the size of the spurs at once attract the attention of teacher.

In addition, the rustling, fidgeting on the spot during the search for cribs immediately will "dishonest student," and if the teacher will pretend not to notice you, be sure to follow you all the time for control. In our time, in the age of the mobile industry, more and more teachers, teachers are allowed to contribute with an exam on mobile phones, for example, a student watching the clock or use the phone as a replacement for the calculator (a calculator in your phone, it is common practice in colleges and universities, as students in the school did not carry a calculator, and often the need for complex mathematical calculations expressions, where conventional methods of manual addition, division, etc. can not do, and teachers understand this.) Now mobile phone is present in each student and the student, who in turn use it as a container cribs. Mobile crib gives its owner a lot of advantages over those of the ancient custom paper uses the crib. But as with all types of cribs, the cribs have their mobile Disadvantages: Where to get content for cribs? How to put it in my phone? An old phone model and does not support reading formats such as doc, txt, pdf. On the internet many websites offering free mobile crib, but most of them, or offer to pay for a resource or have very poor and often the same for all similar sites set cribs.