The devices that convert heat into usable electricity and use the three established thermoelectric effects known as the Peltier, Seebeck and Thomson effects are thermoelectric generators (TEG). These devices can generate power how long as there is a heat source. TEGs are made from thermoelectric modules and the cost of this modules is high, but the...

By Adina Pop-Vadean, Paul Petrica Pop, Tihomir Latinovic, Cristian Barz

This paper presents the current situation of gas meters in Romania, analyzing types of gas meters and also proposing new methods of optimization for that equipment, as finally to be able to achieve and optimize readings of gas meters with an increased safety against gas theft....

By Costel Ieremie Breban, Nicolae Ungureanu

This paper wants to present the current status of the reading process and data processing on gas consumption and to present some methods that involves optimization for the mentioned processes....

By Costel Ieremie Breban, Raul Florentin Drenta

In this paper we present a technological problem encountered in the machining accuracy of the parts for aerospace, made of aluminum alloy extruded profile with 7 meters length. Those parts have very tight tolerances and on milling process appears deviation due to thermal expansion effect, which influences the repeatability of machining processes. T...

By Stefan Adrian Moldovan, Vasile Nasui, Marius Cosma

Gas pumping units (GPU) GTK - 25i produced at Nuovo-Pignon company (Italy) have been in operation for more than 40 years and most of them have fulfilled the established service life or are close to it, and therefore their further operation can lead to emergency situations. Considering that on the Urengoy- Pomary-Uzhgorod gas pipeline today more tha...

By Leonid Zamikhovskiy, Volodymyr Pavlyk

Electronic properties of pulsed laser deposited, nanoscale CeNi5 alloy layers, on a dielectric substrate are described using the complex dielectric function. This spectral behavior is studied separately for the real part ε1 (the dielectric constant or dielectric permittivity) and imaginary part ε2 (the dielectric loss function) of t...

By Daniela Todoran, Radu Todoran, Zsolt Szakacs

The importance of digital technologies is continuously increasing for the customers and thereby also for the companies. Examples for the digital transformation are the usage of smartphones and other gadgets as well as social media channels as Twitter and Facebook. The changing behavior of the customers has also impact of the relationship between a ...

By Sarah Hahn, Ovidiu Cosma, Cristian Barz, Claudius Klaus Jalba

The combined effects of climate change and rapid urbanization inflict a higher risk of flooding in urban areas. Urban storm water runoff results from rain, snow, sleet and other precipitation that lands on surfaces, such as roofs, parking lots, streets, sidewalks, and green infrastructure. Impervious surfaces are recognized as a major problem in ma...

By Dragana Dimitrijević Jovanović, Predrag Živković, Jelena Janevski, Petar Cajić, Dejan Jovanović

The efficiency of operation of gas pumping units (HPA) is characterized both by their technological parameters and the technical state of HPA as a whole. If a number of methods and technical means for their implementation have been developed to control the technical condition of the main units of HPA (power bearing elements, blades, piping, etc.), ...

By Leonid Zamikhovskiy, Oleksandra Mirzoieva, Sergii Zikratii

In Serbia it has been shown that the ecological awareness of the population has been growing in recent times. Especially in the last ten years, when various transformations in the area of governance and competencies in the republic began to acquire conditions for the implementation of projects in the field of waste management. First of all, it refe...

By Ana Momčilović, Dragana Dimitrijević Jovanović, Predrag Miodrag Živković, Nevena Tomić