The security services of centralized surveillance appeared in our country in the 1970s. In today's article we will return to the area of ​​alarm and security systems using the permanent exhibition of the Police Museum of the Czech Republic.

This article describes the basic principles of Internet of Things and deals in detail with the types of networks for Internet of Things in the Czech Republic and their advantages and disadvantages.

Electrochemical capacitors (supercapacitors, ultracapacitors) are electrotechnic components which are able to accumulate, hold and bring back a lot of electricity (compared to conventional capacitors). For accumulation of electricity they use two principles: electric bilayer and reversible chemical reactions.

On June 16, 2017, the Ministry of Industry and Trade announced a grant call for proposals under the Operational Program Entrepreneurship and Innovation for Competitiveness, the Energy Savings Program, which offers subsidies for photovoltaic systems with / without accumulation to cover their own electricity consumption of business entities.

Do you have a CCTV installed in your apartment building? What will happen to you in 2018, when the new European legal framework for the protection of personal data, which is the General Regulation 2016/679, comes into force.

Indoor environment quality is being more and more discussed topic. Technologies for indoor monitoring are becoming affordable and thus can be installed as autonomous monitoring and indicative systems. It can be used also in connection with ventilation system. In this article there are summarized the most important quantities related to the indoor air quality with its limit values. Particular technologies of sensors are mentioned and new sensor platform for complex monitoring of indoor environment with possible usage for controlling systems affecting indoor environment is introduced.

The paper describes briefly the problems of temperature measurements during fire tests. To verify the standard requirement an experiment was conducted with three K type thermocouples (TC) of different diameters of wires and lengths of connected cables. TCs were inserted gradually into the el. heating furnace heated at the temperature of 800 ° C with records over time until reaching maximal steady state temperature; TCs were subsequently removed from the furnace and again with recording temperatures during cooling to the room temperature. The results are shown in the table and graphs. The experiments have confirmed that the sensitivity /response of TC to fluctuating temperatures of the gaseous medium depends on the diameter of the TC. It is obvious that these findings could have practical use in the field of fire protection.

This paper describes extinguishing experiments to verify the possibility of increasing the efficiency of extinguishing low, medium and high pressure water mist charging by the electric field of high DC voltage. The experimental results confirmed the effects of the electrical voltage, the configuration of electrodes (anode, cathode), the volumetric water flow rate, water pressure and the type of mist nozzle. Higher extinguishing effect electrically charged water mist to extinguish showed a shorter times to extinguishment, a smaller volume of water to extinguish the fire and extinguishing a higher percentage of successful attempts. Benefit: faster and more efficient fire- fighting with less risk of injury and less consequential damages in a protected space.

One of the main trend of the 21^st century in the field of electronic products and information technology is uniquely accessing of devices via the Internet and their remote monitoring and control. Such devices are generally called as smart. In general awareness will begin to receive designation as a smart city, smart street, smart building, smart TV, smart thermostat, smart refrigerator, or even smart light bulb. The flip side of that has not still been publicly spoken is the cyber security of these devices against hacker attacks from the Internet.

The natural radioactivity lives mankind throughout its development. The effects of radiation to some extent they can influence the evolutionary history of life on Earth. It is therefore important to determine what values the natural radioactivity would reach different locations of the world.

Turnstile, a device designed to physically limit passage for just single person at a time. In the past it was often just a mechanical gate while today it is a full-featured electromechanical device with its own control and evaluation logic.

Turnstile, a device designed to physically limit passage for just single person at a time. In the past it was often just a mechanical gate while today it is a full-featured electromechanical device with its own control and evaluation logic.

Turnstile, a device designed to physically limit passage for just single person at a time. In the past it was often just a mechanical gate while today it is a full-featured electromechanical device with its own control and evaluation logic.

This article is the third in a series of Smart Cities - the cities of the future, which is aimed to provide some concrete solutions and applications of smart cities, that are already being applied in the world and tries to describe their contribution to public administration and urban residents. In this article, we focus on two areas of Smart City - Smart Living and Smart Environment.

The article describes selected topics from historical buildings fire protection methodology. Covered topics are fireproof coatings, building division into fire compartments and attic and roof.

This article contains a description of the fire detection and fire alarm system, as a part of the overall fire protection equipment of a buildings facilities and technology amenities; including principles of its design, installation and operation.

Checking the inner shell of tunnels during the construction phase as well as of existing tunnels is importand for their safe operation. Various non-destructive methods have been developed for this, which allow the control check to be carried out with experiences which were obtained using the new device, pased on an ultrasonic pulse echo method.

Emergency lighting is one of the most important species of fire safety equipment which determine the fire safety of buildings or other facilities. Emergency lighting is established for use in the event of failure of normal artificial lighting and is therefore supplied from the second independent source. Properly designed, highly functional and operational installation of emergency lighting is essential to ensure a quick and safe escape of people in case of emergency.