The basic idea of inverse optimal control theory for nonlinear systems is to find a feedback control law based on a priori knowledge of a Control-Lyapunov function (CLF), that leads to Lyapunov stability of the system and minimizes a cost functional [1], [4]. The problem of inverse optimal control leads to the Hamilton-Jacobi-Bellman (HJB) equation...

By NICOLAE POP, LUIGE VLĂDĂREANU, ADRIAN I. POP

Modern processing is a combination of individual production cell, designed to complete the business of manufacturing parts of subassemblies and their integration into the final product of the product. The success of such a system depends on stability operations while minimizing the possible errors in the system. The continuous monitoring system is ...

By TIHOMIR SAVO LATINOVIC, MLADEN TODIC, CRISTIAN BARZ, ADINA POP-VADEAN, PAUL PETRICA POP

This paper presents a study of the fuel cell system performance operating at low pressure. A polymer electrolyte fuel cell (PEMFC) is analyzed in according with the possibility of using in transport applications. So, it begins with the description of a parametric model of the fuel cell which has been developed using a combination between empirical ...

By RADU ADRIAN TIRNOVAN, CONSTANTIN PICA, MARIA CRISTEA, COSMIN DĂRAB

The main goal of this paper was to obtain all acceptable locations for siting of wind turbines in the region of Central South Serbia. One of the possibilities to increase the rentability of the wind farm is to reduce the transport loses, using produced energy as close to the production site as possible. The estimations were obtained using the WAsP ...

By PREDRAG MIODRAG ŽIVKOVIĆ, MLADEN TOMIĆ, DRAGANA DIMITRIJEVIĆ JOVANOVIĆ, JELENA JANEVSKI, MIRKO DOBRNJAC

The general form of the Biot-Savart law is referring to a closed loop, but it can be integrated over a finite length solenoid to calculate the external magnetic field in a specific point, at a rated distance from the center. The law states that the point of measure must be on the longitudinal axis of the solenoid. In real cases the point of measure...

By BOGDAN IUGA, TIRNOVAN RADU-ADRIAN

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

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

The paper presents a viable success alternative for solar energy valorification to generate electricity for city streets lighting system in Baia Sprie town. The electricity provided by solar power plant starting on 2016 and it’s used for city streets lighting system with partially replace for conventional electricity. Within the Romanian Regi...

By VALERIA MIRELA BREZOCZKI, GABRIELA FILIP

The postwar period of the rapid social change has brought not only a specific framework in which social work develops but it has also brought ever increasing complex social problems that require new methods of work and different approaches. Legislative regulations, high demands and expectations of skilled workers, and present lack of interest of th...

By NIKOLA VOJVODIĆ, DRAGANA SAVIĆ PEŠEVIĆ, MLADEN IVIC

The paper presents some theoretical aspects regarding ecological politics. Due to the advanced environmental damage in the past decade, the involvement and the responsibility of international and political actors has increased. The impact of human actions over the environment is one of the main causes of the damage in this field. The role of politi...

By OCTAVIA DOMIDE

The liberalization of the Romanian energy market has led, for some companies in the energy sector, to the necessity of marketing campaigns. If for a long time, individual consumers had the status of consumers and, implicitly, supply companies had their own regional market, the passage of consumers into the category of eligible ones also generated c...

By STET MIHAELA

The use of ceramic materials in thermal pulverization technique has led to a massive enlargement of the range of areas in which they find their use. Due to the large hardness, the dielectric properties, the resistance to high temperatures, ceramic materials find many applications in areas such as the automotive industry, the aviation industry, the ...

By LAURA MARIA BENEA

A new, precise, scalable multi-purpose gripper system for academic research purposes is proposed. The multi-purpose gripper is intended to be easily adapted to different tasks and object sizes. The gripper system is driven by two separate motor-gear-lead spindle units, operated by a small CNC control. Software running on the CNC unit is completely ...

By STEFFEN EPPLE, ROLF JUNG, CRISTIAN BARZ, VASILE NASUI

There has been formulated definition of scientific and educational information space of technical higher educational institutions in the conditions of modern development of information technologies (information environment). The information models of the scientific and educational process, role functions of participants, influences of new standards...

By LESYA SHKITSA, VOLODYMYR KORNUTA, OLENA KORNUTA, IRYNA BEKISH

There has been formulated definition of scientific and educational information space of technical higher educational institutions in the conditions of modern development of information technologies (information environment). The information models of the scientific and educational process, role functions of participants, influences of new standards...

By LESYA SHKITSA, VOLODYMYR KORNUTA, OLENA KORNUTA, IRYNA BEKISH

The present paper is meant to be a short presentation of the actual stage of nanomaterials used in dentistry. It shows some theoretical considerations regarding characteristics of some nanomaterials used in dentistry. In recent years, increasing demands for dental reconstruction have led to the development of new materials that have multiple applic...

By CORINA MONICA POP, ADINA POP VADEAN, IOANA TAȘCU-STAVRE

Some considerations regarding different earthing electrodes types and arrangements are discussed. The computation of the earthing resistance and voltage distribution, the designing, installation and testing procedures are evaluated and compared. Typical mistakes, inadvertences, wrong or incomplete procedures are outlined, e.g. the soil resistivity ...

By LIVIU NEAMT, HORIA BALAN, OLIVIAN CHIVER, ALEXANDRU HOTEA

This article presents a new method for determining the effective capacity of a lead-acid battery by applying the least squares theory. Power supply of an isolated power grid can be achieved with a mix of sources, among which the most affordable are solar energy, wind power and fossil fuels. In these cases, the final price of the electricity obtaine...

By DORIN SABOU, RADU TÎRNOVAN

Science is developing rapidly and it is so fast that society can’t follow. The negative consequences of such a rapid development start to appear. First, developed countries can easily apply scientific achievements to improve the lives of their citizens, while developing countries live harder than 20 or 30 years ago. Second, pseudo-science app...

By GORAN KALINIĆ

When preparing raw materials for the manufacture of ceramic products (clay), a significant amount of metallic impurities falls into it. With further technological operations, such raw materials are a source of danger for equipment that can fail if metal inclusions get into it, or the process line. In this regard, an urgent task is the development o...

By LEONID ZAMIKHOVSKIY, IVAN LEVITSKY

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 DSWIG scheme proposed in this paper uses an inverter with apparent power lower than the corresponding generator power. The expected ratio between the inverter power and the generator power is 50% in the case of DSWIG. This is similar to DFIG applications. The advantage of DSWIG is the lack of brushes. DSWIG can be used in variable speed applica...

By SORIN IOAN DEACONU, FEIFEI BU, MARCEL TOPOR, LUCIAN NICOLAE TUTELEA, NICOLAE MUNTEAN, DAN HULEA

Many years after the war, in the majority of ex Yugoslavian countries, the main topic has been unemployment issue. Countries passed the process of transition from centrally regulated economy into market oriented one. Money, as one of the highly mobile factor of production, came into region throughout financial channels. Opposite to money, contempor...

By MIRJANA STOJANOVIC-TRIVANOVIC, VESNA RODIC

In this paper we shall describe how to help people in commercial property management with answering the question: are hobby and DIY solutions based on inexpensive microcontrollers good enough and are they capable to manage the energy efficiency of commercial buildings. System is based on network of PIR movement sensors, door and window sensors, lig...

By SAŠA SALAPURA

One of the least researched, but important issues in the field of political sciences is the implication of social responsible policies in making and implementing public policies and which are the bases of the social responsibility issue. There are some fundamental questions that are philosophical ones, but which represent part of the base of politi...

By OCTAVIA DOMIDE, GHERASIM SOLOVESTRU DOMIDE

The analysis of modern technologies for the construction of automated control systems (ACS) and ways to expand their functionality based on modern Internet technologies has been carried out. One of the ways to extend the functionality of the ASC is to use a WEB-server integrated into the PLC (Programmable Logic Controller). Especially useful is the...

By MYKOLA NYKOLAJCHUK

The article aims at studying the theoretical basis and developing a methodological approach to assessing the development of urban infrastructure from the point of view of the use of venture capital. The article explores the tendencies of the development of venture capital investments in the world. Particular attention is paid to comparing volumes o...

By ULIANA ANDRUSIV, IRYNA KINASH, ANZHELA CHERHATA, ALLA POLYANSKA, OLEH DZOBA, TETIANA TARASOVA, KIRA SPIRODONOVA

The paper aims to carry out experimental research meant to increase the quality of some mass produced furniture items. In order for that to happen, a great number of size measurements have been done on beech and birch wood parts obtained through milling and drilling with numerically controlled machines. The experiment lasted for a week, with work b...

By LILIANA DRAGAN

The paper describes the method to determine the locations of additional measuring points to determine the impact of the sulphur dioxide emission from the Kostolac B thermal power plant for different weather conditions. Concentrations in ambient air, for defined emissions, at a certain distance from the emitters are predicted. The aim is to determin...

By JELENA MALENOVIĆ NIKOLIĆ, GORAN JANAĆKOVIĆ, PREDRAG MIODRAG ŽIVKOVIĆ, DRAGANA DIMITRIJEVIĆ JOVANOVIĆ, DEJAN VASOVIĆ

Heat exchangers are one of the most used and important devices in modern industry, as well as in residential sector. There is no ideal heat exchanger. As a result, there are many types of heat end mass exchangers. The design differs according to the capacity, temperature, pressure, type of work fluids and other factors. As several different types o...

By PREDRAG MIODRAG ŽIVKOVIĆ, MLADEN TOMIĆ, MIĆA VUKIĆ

This project showcases the effects of the homogenization treatments applied to 2724 cast aluminum alloy semi-products, as well as the results regarding the resistance and plasticity improvement of these semi- products. These results have proven the validity of the initial processing hypothesis, which states that certain modifications of the crystal...

By AURICA POP, GHEORGHE IEPURE

The fact that small enterprises in general and small business in bakery industries in special, are organized and lead by a particular style of management, based on own experience and very often intuition where financial resources to run a strong marketing campaign are limited brought to our attention the concept of social responsibility which offer...

By GABRIEL RUS, ADRIAN D. POP

The development of modern process control systems for mechanized oil production using sucker-rod pumping units (SRPU), in particular during periodic well operation, requires information not only on the parameters of the reservoir, well and operation mode, but also the technical condition of surface and underground equipment. On the basis of the ana...

By LEONID ZAMIKHOVSKIY, ANDRII ROMANYUK

The paper approach some aspects of die design in various shape extrusion is quite complex and it is influenced by a variety of factors, which lead to increased mold performance in the extrusion process of high strength aluminum alloys. The analysis and the Solidworks computer program were used to analyze the extrusion of the shape from high strengt...

By VASILE HOTEA, JOZSEF JUHASZ

Companies are market participants and as such have a justified interest in achieving business reputation or image through their attributes. It is very important that the individuality of companies is differentiated on the market for future business partners as users of their services or in the purchase of products. Therefore, the attributes are of ...

By BRANA KOMLJENOVIC

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

Robotics has slowly entered every domain where progress-imposed activities/ actions that were beyond the natural capabilities of humans. The most relevant example in this sense is the industry with all its branches where the higher and higher level of quality and output capacity have imposed the use of specialized devices that could perform faster ...

By CALIN LIVIU VAIDA

In order to solve the problem of environmental safety improvement and the effectiveness of flushing out of well that are being drilled a modernized scheme of drilling rig pumping-circulatory system has been designed. System approach of modernizing separate elements of pumping-circulatory system has been used. The maximum air-tight pumping-circulato...

By LESYA SHKITSA, TEODOZIYA YATSYSHYN, MIKHAYLO LYAKH, OLGA SYDORENKO

The industrial field, like any other domains, come under several risks. The most common risk in this area is the risk of damage. This sort of risks is best quantified by technical specialists in each field. They come with technical solutions for damage risk, but the risks have an economic component too. Damage and economic losses caused by industri...

By GHERASIM SOLOVESTRU DOMIDE

Implementation of a project-based learning model in the higher education institution allots a task of coordination of the subject-oriented and project-oriented management of the educational process. The purpose of the paper is the development of the aspects of activity management of the institution of higher education to attract students to scienti...

By LESYA SHKITSA, VOLODYMYR KORNUTA

The heating process inside a conductor, produced by the AC current Joule losses is very complex, because of the numerous parameters acting at the same time. For this reason, the experimental verification of calculated results would be welcome and this paper presents an attempt of temperature measurement procedure. First of all, in the laboratories ...

By KAROLINA KASAS LAZETIC, GORANA MIJATOVIC, DEJANA HERCEG, MIROSLAV PRSA

Drying is one of the most important operations in the food and processing industry, primarily because of maintaining the quality of foods intended for storage and use over a longer period of time. Therefore, this process is justifiable to use wherever possible, and most often for drying fruits, vegetables, medicinal herbs, etc. The process of dryin...

By MIRKO DOBRNJAC, PREDRAG ŽIVKOVIĆ, SANJA DOBRNJAC

The galloping evolution of contemporary society, the abundance of information under its many forms, brings the man in the middle of a personal chaos in which he feels more and more lonely. In a lecture on the so called New Age concept, a journalist described the man in a way that reminded me: he one feels one, another does something else and he say...

By CĂLĂUZ ADRIANA FLORENTINA

Measuring the turbidity of water is an important step in testing its quality, since it is one of the methods for determining whether it is safe to use. Today, there are many methods for measuring the turbidity of water, some of them are designed specifically for regular research, others are used to monitor the quality of water associated with the u...

By LEONID ZAMIKHOVSKIY, SVITLANA PETRIV, OLENA ZAMIKHOVSKAYA

The toroidal cutting edge, also called corner cutter, is a combination of the cylindrical-frontal milling cutter and the spherical head milling. The paper follows at generating the optimal trajectory for making the finished product with the toroidal cutting edge without having to use the flat end mill and the ball nose end mill. This trajectory is ...

By ANDREI RAUL OȘAN, MARIUS COSMA, VASILE NĂSUI

In order to solve complex decision-making problems, MCDM has recently known a fast development. One of the main differences between the decision models consists in the way of evaluating the numeric and the non-numeric data that interfere while solving a problem. If the number of the criteria is not high and the evaluation contains both quantitative...

By ADELA BERDIE, ADELINE BERDIE, SORIN JITIAN, MIHAELA OSACI, CRISTIAN BARZ

The paper presents different types of controlling and monitoring an industrial process through web interface, depending on the connection types made by PLC or HMI used in the process. We can control the industrial processes through HMI interface directly on the web or phone if we use a Weintek HMI in connection with a SIEMENS PLC for manipulating T...

By CRISTIAN BARZ, TIHOMIR LATINOVIC, PAUL PETRICA POP, ADINA POP-VADEAN, SINISA DRAGUTINOVIC, FELICIA DRAGAN

During research of emergence and evolution of clusters in the particular case of Romania, it was noted the importance of a innovation systems of processes structure that is superposed from the very beginning on the structure of clusters, comprising also universities and research and design institutes. Considerations are made regarding the overlappi...

By DINU STOICOVICI, MIHAI BĂNICĂ, MIORITA UNGUREANU

Jerk, as the derivative of acceleration, is used more and more in the kinematic study of the systems characterised by short travels and requiring a high precision of positioning, including elevators, CNC machine tools, and industrial robots. The acceleration modeling using jerk variation serve as a basis for generating the functioning tahogrames of...

By IOANA CRACIUN, MIORITA UNGUREANU

As a request of a partner and subject of a research contract, this paper intend to present different stages of studies regarding the behavior of some Aluminum structures under different types of loads. Starting from existing examples, a company from aerospace industry intended to produce similar products but at a larger scale. On a virtual product ...

By HORIA CIOBANU

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

According to Leyman, mobbing has 5 development phases: 1) Conflict - As a potential basis of mobbing, there is an unresolved conflict among associates, which ultimately results in a disorder in interpersonal relations. The original conflict is soon forgotten, and the remaining aggressive tendencies are directed towards the chosen person. 2) Aggre...

By VESNA RODIC, BRANA KOMLJENOVIC, MIHAELA POPA, MIHAELA ANAMARIA LIHET

The paper achieves a study on the reactive power consumption in case of a medium sized factory. The factories as others industrial consumers usually have the power factor lower than the neutral one, which in Romania is 0.92; that is why these types of consumers have to pay for reactive power. The reason for the power factor is small (sometimes much...

By OLIVIAN CHIVER, LIVIU NEAMT, CRISTIAN BARZ, ELEONORA POP, ZOLTAN ERDEI

The nature of impact of human activities over the environment can be various and depending of many implied factors, as the intensity, period and the toxicity of the involved materials. The concept of ecological restoration is relatively new in the dictionary of the environmental protection field of activity and implicitly the regulations regarding ...

By GILBERT TARO, MIRELA COMAN

Usually, the international Projects are of greater importance and with greater founding than national projects, involve multiple partners from different countries and are subject of nationals and international controls. The paper underline responsibilities of the management team both to the Project Contract and to the national laws requirements, re...

By ANAMARIA DĂSCĂLESCU, MIORIȚA UNGUREANU

The paper presents the results of theoretical research of the solar energy resource potential calculated by different methods for administrative areas of the Carpathian region. The advanced methodology of the estimation of the solar power plants influence on the natural environment is proposed, which deals with the determination of the significance...

By OLEG MANDRYK, NATALIYA MOSKALCHUK, LIUDMYLA ARKHYPOVA, MYKOLA PRYKHODKO, OLENA POBIGUN

This research introduces the theoretical and experimental study of the plastic deformation through drawing of the copper wire, the presentation of the microstructures resulting after each drawing, certain possible flaws which occur within this plastic deformation process and the conclusions on the grains` flip- over and elongation. During the drawi...

By ELENA POP

Technical needs a permanent revision of thinking and orientation of a restructuring of how to integrate its components to keep up with the demands of the information society. Systems thinking provides for technical field models that make it more dynamic and oriented for interconnection, information and interchange. Our approaches will bring togethe...

By PAUL PETRICA POP, ADINA POP-VADEAN, CRISTIAN BARZ, TIHOMIR LATINOVIC

The paper presents the theoretical research regarding the variation of the geometrical and functional parameters at the fluidic device which operates based on Coanda effect. The experimentally tested bistable fluidic element is a special device with incompressible fluid as supply jet and compressible fluid as command jet recommended for automatic a...

By ADRIANA COTETIU, RADU COTETIU

This study, using the theory of electric circuits, shows the right definition of scattering parameters (S- parameters) for any two-port electric circuit and the practical way to use these parameters in streamline the processes of information transmission and propagation, and the transfer of the active power from the electric quadrupole input (outpu...

By ERDEI ZOLTAN, MIHAI IORDACHE, DRAGOȘ NICULAE, CRISTIAN BARZ, ALEXANDRU GRIB

When mobbing has already begun, it may be difficult to keep it under control if immediate action is not taken. Trusted advisers and mediators can play a very important role. To intervene early, the supervisor must be able to read the first signs of mobbing process in development. Top management can be to appoint one or more persons in the organizat...

By VESNA RODIC, BRANA KOMLJENOVIC

Copper sulphate is used as an antifungal agent. Long-term applied fungicides allow the accumulation of copper in soil. This metal pollution is a problem when it enters in the food chains. In this study we investigated the effects of CuSO4 x 5H20 at different concentrations (0.05g/L; 0.1g/L; 0.5 g/L; 1 g/L) on seeds germination. The experiments have...

By STELA-GABRIELA JELEA, MARIAN JELEA, OANA-CORINA JELEA, LUCIA MIHALESCU, ZORICA VOŞGAN

The Artificial Intelligence will be to the human brain what the backhoe was by hand. The great intellectual professions will all be impacted, which will free the human brain for more imagination. All the leaders of higher education establishments - engineering or business school, are facing two great challenges of artificial intelligence (AI). It i...

By MARIUS CALIN BENEA

The mining industry in Maramureș area was an important factor of economic and social progress in this zone. The gradual reduction of th mine activity, until its actual shutdown, has caused disturbances in the economic and social field. This type of industry was, and it continue to be, even in inactivity periods, a pollutant factor. Protecting the e...

By OCTAVIA DOMIDE, GHERASIM SOLOVESTRU DOMIDE

The paper presents the results of theoretical research on the resource potential of solar energy calculated by different methods for administrative areas of the Carpathian region; The advanced methodology of the estimation of the influence of solar power plants on the natural environment is proposed, which concerns the determination of the signific...

By OLEG MANDRYK, NATALIYA MOSKALCHUK, LIUDMYLA ARKHYPOVA, MYKOLA PRYKHODKO, OLENA POBIGUN

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

Fish is an important source of protein, iron and zinc - essential nutrients for child growth and development, a source of energy for adults, elderly. Omega-3 fatty acids found in different fish species help develop children’s brains, maintain flexibility in blood vessels and contribute to brain oxygenation by annihilating the destructive effe...

By KATALIN FODOR, TATIANA BARZ, FELICIA DRĂGAN

Within the European context, there are factors that have changed Europe's way of thinking about itself and about the Islam. Such factors include for example the debates about wearing a headscarf in public schools. Such debates have occurred in many European countries. While the existence of the Islam has been long recognized by the constitutions of...

By ADELINE BERDIE

The composting is one of the most effective recycling method of green waste. The presence of some heavy metals as Cr2+, Cu2+, Mg2+ and Zn2+ may influence the compost quality. Thus, by adding some components like manure the micronutrients and heavy metals regime suffer changes which might influence their bioavailability for plant uptake. The bioavai...

By IRINA SMICAL, ADRIANA MUNTEAN

The tapered screw joints are widely used in the formation of the drill string. They consist of two parts - a box and a pin. during the process of screwing box and a pin the contact pressure between thread surfaces arises, the magnitude of which affects the intensity of wear on these surfaces. For the first time, the authors offer in this work to ch...

By OLEH ONYSKO, VOLODYMYR KOPEI, VITALII PANCHUK

Monitoring of the technical condition of gas pumping units (GPU), including the average power of the GPA- Ts-16S type, is important during operation, since damage to its main unit - the blade apparatus can lead to significant economic losses and, in some cases, to an accident. The analysis of the methods of parametric and vibroacoustic control rela...

By LEONID ZAMIKHOVSKYI, NATALIA IVANUYK

This paper deals with a problem of finding the right address in the new city or unknown part of the city, the right door. The psychological pressure on people in this situation can be quite large and unpleasant, especially when the GPS could not provide enough support. The outdoor position systems are based on GPS signal and besides that, they are ...

By ANDJELA ŠPANOVIĆ, DRAGANA PRERADOVIĆ

Ornamental indoor flowering plant species are species that flower for more than one season, as well as those that are grown primarily for the beauty of their flowers. On their thickened stems, cactuses sometimes bear tufts of wool. They do not have foliage and most of them have thorns. Succulents are Xerophytes that survive drought by storing water...

By BORIS DORBIĆ, LEA ZEMUNOVIĆ, EMILIJA FRIGANOVIĆ, ŽELJKO ŠPANJOL, ZVEZDA BOGEVSKA, SANDRA POPOVIĆ

 Textile printing is an increasingly important area of the contemporary graphic industry, and screen printing represents a dominant technique in this field. The quality of the print depends on many parameters, such as the type of substrate material or the type of printing ink. The usual way to evaluate print quality consists of an objective as...

By MILOŠ MESELDŽIJA, NEVENA VUKIĆ, TAMARA ERCEG, NATALIJA BUDINSKI, ZSOLT LAVICZA, ISAAC LERA, DEJAN KOJIĆ