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Starting to elaborate complex activities as projects or recurrent work requires taking into consideration the relationship between effort and benefits which may gain different forms depending on the field of intervention. The most widely used and measurable context is referring to the effort, qualified as costs, and the benefits, viewed as added value gained by stakeholders regardless of the form: tangible and/or intangible elements. The analysis of efforts and benefits calls for a holistic approach for evaluating...

After assessment of supply of ecological (EKO) and Premium quality products (PQP) of bee-keeping in Lithuania in 2012-2014 it can be seen that the number of ecological bee-keeping farms sequentially decreased by 2 farms from 2012 to 2014. Amounts of honey (34.66 t), (32.14 t), (33.56 t) collected during the research period were similar; quantities of all bee-keeping products decreased, except for pollen: in 2014 their quantity increased by 1.8 times, comparing with the quantity at the beginning of the research per...

A complex ecological analysis of the building sector includes different aspects. When building constructions are scrutinized from the point of view of nature protection, it is advisable to consider the entire life cycle of a building structure. Among the most essential elements of an assessment is the possible recyclability of materials recovered after the demolition of a building. Striving towards a global reduction of the volume of waste, we are forced to implement such construction and technological solutions t...

This study focuses on petrophysical characteristics of flysch sandstones in the S-8 well section, located in the western part of the Polish Outer Carpathians (southern Poland). A number of laboratory tests were performed with application of the mercury injection capillary pressure, low field nuclear magnetic resonance, X-ray diffraction and pulse decay permeability measurements. Laboratory tests results were compared with the well logging interpretation. The laboratory analyses were conducted on core samples from ...

In many practical cases a composite column can be made-up as completely encased section or a concrete- filled section. In case of the composite steel-concrete members, the mechanism by which shear stresses can be transferred over the interface between the structural steel component and the encased concrete are adhesion, interface interlocking and friction, which are referred to as the natural bond. If the natural bond is not enough to achieve the required shear resistance there is the possibility of using mechanic...

Foundation construction issues have emerged from ancient times, since antiquity, along with the constructions of dams, canals, ports and buildings with different destinations. On the occasion of these constructions, practice has shown that are obtained a low strain and a high stability if are included in their composition a distinct part that is lowered below the natural ground. The construction of foundations by ordinary methods becomes even more difficult if is made under the underground water level. Also when t...

The aim of this paper is to highlight the significance threshold between the kinematic and dynamic characteristics of sports technique key elements used in dismounts and the performances achieved by junior gymnasts in uneven bars events. This scientific approach is part of the formative pedagogical experiment associated to the postdoctoral thesis, at the midway point, in the end of the competitive year 2014. The following research methods have been used for this purpose: bibliographic study of specialized literatu...

The aim of this paper was to obtain some fluid extracts from Romanian wild fruits such us, Cerasus avium L. Moench. (syn. Prunus avium L.), Morus nigra L. and Cornus mas L., with a rich content in polyphenols, carotenoids, vitamins, minerals and an increased antioxidant and antimicrobial activity, which bring important benefits to our health in preventing many diseases arose from free radicals of oxidative stress action. Vegetal fluid extracts obtained from wild fruits, at concentrations 50% v/v ethanol were obtai...

Dry eye disease became an important problem of public health, because of its increasing incidence, caused by pollution, global warming and expanding work on video terminals. Under the actual circumstances in which the ocular tissue lubricant, commonly referred as artificial tears, market includes every day new comers, the authors were interested to find out how the various active pharmacological agents impact on the eye surface. This different impact on the eye might be able to help practitioners to better individ...

In the modern literature, various methods of qualitative and quantitative assessment of maxillofacial anomalies are described. They are reduced to determining the location of violations, describing the causes of their occurrence, considering the functional state of the dentoalveolar system, as well as quantitative expression of the degree of violations of face aesthetics, occlusion, morphology and function in various dentofacial and facial abnormalities. The method developed by us makes it possible to objectively ...

In a market where footwear quality involves both health improvement and a better environmental protection, пїЅenvironmentally-friendly footwearпїЅ that minimizes environmental and health impact, guaranteeing a certain level of quality, may fulfill the requirements of today's consumer. Throughout their life cycle, from leather processing to the finished footwear, resulting waste and chemicals contained in some of the products may be harmful for health and the environment. In accordance to European law, waste from t...

Holmium (III) removal from nitrate solutions in a form of dodecyl sulfates using ion flotation and extraction methods was studied. Distribution and removal ratios as a function of equilibrium aqueous phase ?? value were received. Comparison of experimental results was conducted and conclusions on the effectiveness of each method depending on the assigned task were drawn. Comparative analysis of extraction and flotation methods for holmium (III) cations removal from individual water-salt solutions and in the compre...

The calculation program EnergoCost V.1 [8] was developed in order to choose a heating system that would generate minimal costs both in terms of initial investment and energy consumption over time. Thus, it is possible to determine the evolution in time of the energy costs for heating the building, using different energy sources and thermal devices. The results are displayed numerically but also graphically, being very intuitive, and any user of this program can easily interpret these results, choosing the final op...

The paper deals with processing the waste generated in paper recycling: initial waste of paper mill and sludge after wastewater treatment. The authors have analyzed characteristics of the waste of paper recycling generated in paper recycling plant near Kyiv (Ukraine): calorific value, moisture and ash content. The heating value of waste of paper recycling range from 6.5 to 24 kJ/kg and significantly depends on moisture content. Potential environmental impact depends largely on the physical and chemical characteris...

Natural resource management in the North of Russia has a centuries-long history which reflects the peculiarities of northern territory development. The specific character of natural resource management in the Arctic zone as well as in the North depends on cer-tain natural and social-economic conditions, limiting factors and environmental protec-tion measures. The Fennoscandia Green Belt is an international cross-border project. The primary goal of the ecological corridor is to provide sustainable use of natural re...

Carbonic materials are considered to be one of the most promising materials for hydrogen adsorption and storage; they have different applications and fuel cells technology may be considered the most important of them. By using metals for doping them, the adsorption capacity increases, thus approaching пїЅthe targetпїЅ of 6.5% weight ratio of H2 adsorbed in a substrate. A comparative research related to hydrogen adsorption capacity of poly-aniline (PANI) doped with Platinum (Pt), Ruthenium (Ru) and Iridium (Ir) was...

Although hydropower is one of the oldest energy sources used by man, it is still the leading green, nonpolluting and renewable source for electricity generation worldwide. Hydroelectric power generation is also the most efficient method of large scale electric power generation. Estimates show that there is a huge worldwide capacity of unutilized hydropower potential. Therefore, there are many opportunities for new hydroelectric power plants throughout the world, which makes the study and design of new and improved...

The purpose of the study was to present a case study on the parameters of photovoltaic systems installed on different types of roof. These research studies were conducted in the Laboratory of Renewable Energy at the University of Pite?ti.The case study analyzed the production of electricity for different photovoltaic systems, in terms of construction and placement.Mainly, the parameters of these systems were checked in the same weather conditions, such as: temperature, humidity, solar radiation and the unit of are...

In this paper consumer preferences for organic and traditional products are analyzed, regarding the level of consumer responsibility towards consumption which supports sustainable development. This study was conducted by a market research in Arad city, Romania, in 2016 on a representative sample, estimating the consumer preferences for organic products and traditional products. Arad county area is an important agricultural basin, with a rich tradition in traditional food products. These product categories are amon...

The connection of the building, which requires the use of traffic engineering infrastructure, is known as connection. Building connections in build - up areas for coordination purposes is very difficult. Technical infrastructure is in place under the public roads and any intervention requires traffic restrictions. The additional connection of buildings to technical infrastructure is therefore a very costly and expensive and requires adequate preparation focused mainly on the length of the building realization. The...

The modeling of eddy currents in ferromagnetic materials is impossible without information about magnetic field induction dependence of it intensity (magnetization curve). Experimental definition of magnetization curves related to technical difficulties. As a rule, reference information of that curves contains a small amount of knowledge and not applicable for direct application. In this regard the transition from original magnetization curve to its approximation is relevant. The purpose of a research is in the ch...

Reservoir description is rapidly increasing with the help of advancing computing possibilities. Although machines become more efficient, it is necessary to have accurate input data and plenty of data points to achieve reliable results. However, in the case of both old Romanian hydrocarbon reservoirs and some of the new ones, not too many data points are available. In this situation, no matter the computing power of the machine or the computing algorithm, detailed reservoir description is limited. This paper extend...

In the automotive industry, but also in other sectors, since the 80s one of the most used methods of reconditioning is welding. In this way, various technologies have been developed for each batch taking into consideration their characteristics and use. To observe and determine the correctness and economic impact of these technologies, the samples must be checked by different types of destructive and non-destructive standard tests.The most demanding destructive testing on samples is the fatigue test with alternati...

The objective of this paper is to present time and space analysis of drought occurrence in the agricultural regions in Slovakia. It considers the most important natural environment factors influencing the occurrence, duration and intensity of this phenomenon. The analysis of the occurrence of meteorological and agronomic drought was performed for the period 1961 пїЅ 2014. The results detect the importance of dealing with the problem of drought in Slovakia. Drought occurred every year during investigated period exc...

Quality of trend-surface approximation of four sites on East European plain was estimated. The sites were selected under condition of location in the landform's regions with different genesis of Earth's surface according to Geomorphological map of USSR 1:2500000. This regions includes are initial plain (Caspian lowland), areas of moraine (Smolensk-Moscow upland) and erosional (Central Russian upland) relief, structural and erosional UralпїЅs foothills. Two types of approximation methods were used: 2D algebraic pol...

Numerical algorithms for constrained nonlinear optimization can be broadly categorized into gradient-based methods and direct search methods. Gradient search methods use first derivatives (gradients) or second derivatives (Hessians) information. Examples are the sequential quadratic programming (SQP) method, the augmented Lagrangian method, and the (nonlinear) interior point method. Direct search methods do not use derivative information. Examples are Nelder|Mead, genetic algorithm and differential evolution, and ...

The parameters of extraction from aqueous solutions into the organic phase of iron, aluminum, manganese and titanium are determined from the pH and concentration of the extractant when they are extracted with oleic and naphthenic acids, as well as olive and sunflower oils. The values of the thermodynamic functions of extraction equilibria with the participation of carboxylic acids and natural oils are taken as the basis for constructing the extractability series, which makes it possible to determine the thermodyna...

When coal preparation, particularly suitable for coking created considerable amounts of sludge. Most of the technological operations is taking place in water environment. Raw sludge at a time when technology was not yet at such a high level as today and emergency overflows were deposited in tailing ponds. This is practiced on coal districts in the Czech Republic and Poland. The purpose of this section was to analyze the possibility of another flotability of coal sludge deposited in settling ponds of company EKO CA...

Passive houses primarily belong to the category of buildings with very low energy consumption for object heating. Their overall energy performance is affected by a number of indicators, including in particular: solution of building structures and details on boundary of building heated space, characteristics of used materials and the choice of opening fillings. In the initial design phase of the building it is necessary to ensure maximum utilization of solar gains and internal gains from people and appliances. Howe...

A conveyor belt in regular operation is negatively influenced by a number of factors. This negative influence is the result of coming in direct contact with the transported material, which frequently causes serious damage and reduces belt lifetime. The scale and type of this damage depends on many factors, such as a beltпїЅs physical and mechanical properties and its design. The properties of the transported material and the design of the feed point are also of considerable importance [4]. When the damage is cause...

In microgravimetric survey it is sometimes necessary to take into account the terrain correction, which eliminates the influence of terrain relief from the measured values. The accuracy of its calculation depends on the quality of mapping terrain relief in the form of a digital terrain model. For mapping is usually used geodetic data from additional measurements carried out using a total station or GPS, and more recently Terrestrial Laser Scanning (TLS). Additional measurements increase the cost of survey, especia...

This work discusses the creation of a river flow generator, which uses as an inputs temperature and precipitation data. These input data could be an artificial series of mentioned climatic variables (especially in context of climate change studies), but when assessing the present-day state, measured data may be used too. For this purpose hydrological model and machine learning model is used. In order to increase the accuracy of the flow generation, the authors have designed and tested various variants of data driv...

Halogen derivatives of hydrocarbons - trihalomethanes (THMs), are formed in disinfected swimming pool waterпїЅ mostly when chlorine compounds are used for the process. THMs have a negative impact on human health because they are carcinogenic and mutagenic. In Poland, the contents of THMs in swimming pool water and air are standardized, the norm for swimming pool water is 100 g/dm3. Several factors can influence the THMs formation in water, but most important are processes and chemicals used for water treatment. Th...

This paper aims comparisons of data obtained by different methods of data acquisition. Will present aspects of quality data obtained with Leica total station ultra 802, with GPS equipment from Leica 1200 Series and comparison of these data with altimetry data obtained using LIDAR technology. Measurements were made in ?ag - Par?a area, of Timi? county, on a length of approximately 4 km and over a width of 50 meters left and right from the center. Using LIDAR technology we can realize 3D models, can be detected and ...

In this work, the filamentous fungus Aspergillus niger was tested for its compatibility with different media compositions, other plant growth promoting microorganisms, and plant growth stimulators. As a first step, a medium selection was carried out employing as a criterion the P-solubilizing activity of A. niger. The highest soluble P concentration of 136,92 mg/L and 394,93 mg/L was registered on Potato-Dextrose and Czapek-Dox medium in conditions of submerged and solid-state fermentation processes, respectively....

In Latvia, aquaculture is evaluated as highly productive, competitive and environment-friendly sector, having an internal self-development potential, which should be used in full. Economic breakthrough in the fisheries in the EU and in Latvia is related to aquaculture sector; consequently, facilitation of its competitiveness plays a significant role. The aim of the research is to evaluate the competitiveness of Aquaculture Sector in Latvia. Based on the author developed Model of the Factors influencing Competitive...

Present study determines conditions for titanium magnetite concentrate processing with fairly complete titanium conversion to the slag and iron and vanadium separation in the hot metal. It is quite difficult to process titanium magnetite concentrate in the blast furnaces due to low fusibility of charge and direct electrical melting causes process instability. Present work is devoted to development of concentrate double stage smelting process with little soda additions, including solid-phase recovery at the first s...

The goal of the contribution is to present a comprehensive and complex possibility of modelling the runoff processes for a given part of Bratislava city. The complex approach consisted of mutual integration of results of partial mathematical models пїЅ rainfall-runoff model, sewage system model, 1-D hydrodynamic modelling of open channel flow together with partially covered flows, 2-D hydrodynamic modelling of flooding the town residential area. All modelling works have been done in DTM coming from aerial photogra...

Fast increase of Earth population during the last decades raised a serious problem when it came to providing fresh and good quality food (mainly vegetables) in big quantity over a short period of time. Due to relatively long lifecycles of plants when growing in gardens or fields, the best solution consisted in using greenhouses. Greenhouses proved to be a very important solution since they are capable of operating regardless of local environments if minimum requirements (heating and water) are provided. By offerin...

In Bratislava, Capital of Slovakia, there is a huge development boom on the edge of the Old City, where is risen up a new complex down town of the city. The territory specified on the edge of the first ring called Chalupkova Centre will have around 20 high-rises with different function and there will be more than 20,000 parking spaces. At present, the operation of the territory is at the border of the saturation flows. There will be a new bus station and begins to reflect on the new tram routes. The extensive trav...

The article presents data management results of repair works performed in the wells with different values of bottom-hole pressure. Repairs performed during the last ten years in the wells drilled in the Tournaisian, Tula, Bashkirian, and Verey deposits have been involved into a special statistical analysis. The authors provide an assessment of possible risks for control and operation of wells with low bottom-hole pressure on the basis of their study experience. The main purpose of the analysis was to determine the...

Emissions of industrial plants contain a considerable quantity of different chemical components. These include ash, soot, smoke, sulfates, nitrates, oxides of metals and other solid components. The size of dust particles emitted by enterprises are defined by the process environment and the composition of raw materials used. Particle fractions less than 10 microns (PM10) and less than 2.5 microns (PM2.5) can penetrate to the upper and lower respiratory tract. Both short and long-term exposures of fine dust particle...

Isotopic composition of noble gases and other volatiles (CO2, N2) from minerals of corundum-bearing rocks with isotopically ultralight oxygen from Khitoostrov deposit have been investigated. The studies were conducted on Finesse mass-spectrometry system [1] using step heating in temperature range from 200пїЅ? to 1400пїЅ?. The following minerals were investigated: corundum, amphibole, garnet, staurolite. For the same samples, differential scanning calorimetry and thermogravimetry curves have been obtained. The firs...

Nowadays, we can notice a phenomenon of extreme diversification of the categories of complex and colorful wrapped food products that attract more consumers on local or world market. The current trend in the modern consumer orientation is for new food products that satisfy both nutritional and sensorial requirements and cause the appearing of new products on the food market. However, we must say that food has a complex composition, sometimes indiscernible to consumers and associated with an improper diet, poor in n...

The research claims that carbonate reservoirs are different from terrigenous one with the ability significantly to improve the filtration and capacitive properties under the influence of hydrochloric acid solutions. Acidic compositions, containing not only the hydrochloric acid, but also various kinds of additives, such as demulsifiers, dispersants, stabilizers (converters) of iron and many others. They are usually selected by experience in practice. Its main function is to simplify the extraction of the oil emuls...

The ever-increasing demand for heating in different sectors, along with more preventative regulations of greenhouse emissions, has forced different countries to seek new alternatives to heat buildings such as district heating system (DHS). DHS is best suited to areas with a high building and population density in relatively cold climates. District heating, considered as the most efficient method for building space heating, has been dramatically developed over the past decades. This paper approaches the description...

The methodology of computer simulation of nonstationary fields of temperatures, concentration and pressure is considered. The computer model of non-stationary heat exchanging process is researched. Decentralization interaction of the active parallel agents is the base for computer implementation. Agents are defined as abstraction of elements of physical system where the modeled processes proceed. Process characteristics are calculated on the base of information on non-stationary fields of temperatures of a wall of...

The article reviews and analyzes the existing computer systems and platforms for the dynamic monitoring of bee hives, through which various states of bee colonies can be detected and analyzed. Contemporary solutions are based on the Internet of Things (IoT) concept and consist of a number of different sensors that collect several types of data about the internal condition of the hive. The article proposes a new model of IoT-based monitoring system, which consists of sensors being located inside and outside of bee ...

Active mining operations in range of gaining raw material have very negative impact on the natural environment. Long-term observations proved that mining exploitation causes very significant changes in natural environment, in the region in which it is conducted. Particularly, this is applies to underground exploitation of hard coal. Underground exploitation and associated coal production cause that a lot of post-mining wastes are formed. These wastes for several years of exploitation in Poland were deposited in po...

Energy efficiency, in building industry, is one of the most important criteria for the selection of the material, the type of construction or the technology of construction. Not only is the amount of energy consumed by the building during its use is taken into account. The amount of energy needed to extract, process all materials used in it, the consumption during construction process and after it, energy expenditure on demolition or the reuse of preserved components are also important. Prefabrication is a process...