Browse

There are an industrial air pollutants as a new, negative factor in agriculture, reflected mainly in second part of the 20. century. There are thousands of hectares of uncultivated agricultural land as a consequence of this form of soil intoxication. There is also reduced soil fertility below the fertility level, on the another thousand hectares of soil, where is needed high energy excess in the form of fertilizers or agro-technical works. Physical and chemical properties of soils have been changed, erosion has be...

Raising the issue of the relevance of culture and peculiar behaviour patterns for taking effective action of individuals and professional groups is an extremely practically useful thread of the analysis of social functioning of a person living in the conditions of modern civilization. The concept of pattern assumes a certain, usually positive, method of its evaluation. Behaviour patterns usually will be transmitted in the area of culture including common environmental views among generations as a tool of a good so...

Historic military complexes form a separate typological genre, with unique hieratic site plans, stately yet austere stylistics and a multiplex functional program. They form a significant portion of historic landscape in garrison towns, as both material and immaterial heritage. It is essential, that as many of the complexes as possible are preserved to serve as historic links for future generations. Luckily, their innate characteristics predispose them to adaptations for diverse purposes once demilitarized. The pap...

Worldwide there is a need to develop new advanced materials based on silicone elastomers with high-performance properties, reinforced with nanoparticles. The curing process as a primary step has a major impact on the properties of the final product, including the determination of the optimal amount of reinforcing agent in the nanometer range and cross-linking agent (peroxides - specific to food, pharmaceutical, medical and consumer goods industries). The aim of the study is to obtain an antibacterial elastomer com...

Construction of green buildings has become a kind of global trend, but its implementation varies greatly by country and region, including the rate of growth in green involvement, triggers and obstacles impacting their growth. Green buildings gives to the forefront of energy efficiency also the impact of buildings on the environment, the environmental burden through production of raw materials and the impact of buildings on the whole region. Green building is therefore designed, built and operated also with regard ...

The aim of this study is certainly not to include and introduce various types of civic amenity buildings in terms of functionality and hierarchy, nor to investigate in detail particular types of civic amenity buildings. The aim of this study is rather to focus on the current trends in building types within the new public facilities, which are based on current problems, namely the lack of services and facilities which are being either supplemented with new ones or are completely replacing the existing, nowadays unu...

The present investigation was done to assess cytomorphologic and cell cycle parameters as indicators of genotoxicity as it is a simpler method and could be suggested for rapid screening of the vast range of agrochemicals used all over the world. The excessive and indiscriminate use of agrochemicals is responsible for increasing the level of pollutants in the soil environment resulting in cellular and molecular damage to the plants. Topas 100EC is a widely employed foliar fungicide for horticultural applications. A...

The article deals with the preparation of the Historical Atlas of the Czech Republic. The atlas will include maps displaying important historical events of the 20th century. The project is a follow-up to the successful Academic Atlas of Czech History, published in 2014, within which numerous classical and innovative maps covering selected events of the Czech history were created. The new Historical Atlas of the Czech Republic aims to extend and further develop selected 20-century topics from the Academic Atlas of ...

This article discusses typical problem of industrial floors, i.e. cracks. Slight cracks are usually effect of volume changes such as shrinkage and creep. There are also other reasons why cracks appear. For example: inappropriate design, heavier load than expected or wrong realization of the concrete slab. Cracks, which are caused by mentioned reasons, are wider and deeper. Wide and deep cracks can cause another defects such as concrete crumbling along the crack. They can be a problem for maintenance and service li...

History of exploitation of gold from Danube river sandy gravels is centuries long. Interesting on it continues to the 1970пїЅs. Extaction of heavy minerals (HM) concentrate was never intend. About 1 milion m3 of sandy gravels is exloited in Slovak part of Danube basin for construction usage. Production of HM concentrate with gold as by-product can improve economy of exploitation. With average content 6,55 kg of HM in m3 of sandy gravels there is possibility to produce about 6500 t of HM concentrate with up to 30 k...

This paper proposes an evaluation of data acquired with various sensors and used in coastal water segmentation applications. Correct monitoring of coastal changes in dynamic coastal environments strongly depends on accurate and frequent detection of shoreline position. Automatic shoreline delineation methods are preferable, especially in terms of time, cost, labor intensiveness and difficulties of in-situ measurements. Two main issues have been encountered within this application field, the quality of data and the...

A very important factor, which has a great influence on the financial situation of mining enterprises extracting coal, is an effective use of machines. To determine the level of the use of the machines, it is necessary to reliably evaluate their work. The credibility of such evaluation mainly depends on the quality and the amount of obtained data about the parameters of the machinesпїЅ work. To synchronize, archive and analytically process the data, it is essential to use appropriate informatics tools. The article...

This article provides a review of recent unfolding geopolitical situation on the world stage. China and Russia have taken huge steps to create alternatives to USD dominated trade and finance. Not too long ago surplus trade countries such as China, Russia and the rest had no choice but to buy U.S. Treasury securities with their surplus USD enabling U.S. currency printing and war waging. China and Russia have accumulated massive amounts of physical gold, amid increased economic sanctions and trade war with U.S. Join...

This paper sheet on пїЅDecoding GPS data for single point positioning computation by using Python programming languageпїЅ shown the program to compute receiver coordinates with use RINEX navigation and data files. In the program it is used single point positioning method to compute coordinates, and the program is coded in Python programming language. Sheet includes a part of the source code and block schemes, which described operation of the program. The comparison of the results of the approximate coordinates sho...

Every year just a small part of the Italian building stock hurts a significant energy regeneration, which occur mainly on occasion of programmed wider restructuring of the building. Therefore, the dynamics of the construction sector are still too slow compared to the пїЅ20-20-20 commitmentsпїЅ (The Directive 2012/27/EU Energy Efficiency entered into force December 4, 2012) and they are not enough focused on new consistent buildings and planned renovations. It should therefore promote and facilitate the process of ...

The majority Hungarian higher educational institutions provide residences for students, but the regulatory framework does not provide guidelines for planning processes nor the design and engineering of university residences, including a quality-perceptual evaluation conducted directly by the future users and focused on the projectпїЅs quality. The assessment of the quality of a university residence project would be a key element to check the results of the project proposal with reference to the needs expressed by ...

Nowadays we often encounter situations which cannot be explained rationally. However, we always try to find the reason of an ensuing situation. On the example of a selected town, the author presents the range of illogical business decisions pertaining to commercial real estate market. A situation in which somebody spends millions of dollars and even though, according to an expert, the business is doomed to failure anyway, requires an in-depth research. Through his meticulous research, the author uncovers that the ...

The purpose of this research is to vertically define the aquifers from the Buzau River alluvial fan. The necessary information was collected from hydrogeological boreholes and it consists of the lithology encountered, the well design, more specifically the location of the screen, and the hydraulic head. In the first part, the studied area was divided by creating several well alignments, which were used to create cross-sections through the alluvial fan. The resulting profiles present the correlation between the lit...

Based on data from long-term observations, dedicated to the study of mercury behavior in water bodies at the estuarine area of the Northern Dvina River, factors, criteria and indicators were identified. The choice of the "reference object" of the Northern Dvina River, due to the fact that based on the literature, and field studies here identified a relatively stable level of mercury in different components of the natural environment, and there are sources of anthropogenic mercury in the ecosystem in the absence of...

The issue of preserving and protecting forests in the face of increasing human activity was presented as very up-to-date. Irrational human activity and fires have led to deforestation of places, once completely covered with forests. The area of tropical forests in Africa has decreased by 70 percent, South America пїЅ by 60 percent, only 8 percent of Chinese territory is covered with forest. The article briefly examines the process of degradation of forest resources in the global economy. This study explores the lo...

Defining the stability of a structure depends on several factors. It is difficult to predict them and take into account in the design phase. Over time, many of them will cause changes in the location of its components. Measurements are required to be taken during the operation of a structure in order to find out about any changes in its geometry. This paper contains an elaboration of the results of measurements of the geometry of a steel drum which is a major component of the historical roller gate dam - Czersko P...

The article deals with the examination of the state of the ball track at the heavy machine ZP6600/Z79. It gives results of material exams which were taken on given samples and it describes the progress and results of the numeric counting for the state of tenseness. The used method works with the ending parts at the bottom of part of the ball track when it touches the ball. The decision about the renovation of the track depended on the determination of the groove size degradation at the ball track. The material tes...

The potential for biodegradation of chemically different dyes of six fungi and bacteria isolated from organic pollutants- and synthetic polymer-contaminated sites was determined. Standard enrichment isolation methods using low-nutrient-concentration media were used to obtain bacterial and fungal organisms from environmental samples. The isolates were taxonomically characterized using molecular analysis and Biolog identification system. The isolates included bacterial strains of Pseudomonas putida, Pseudomonas viri...

This paper studies one of the biggest problems facing older buildings or historic monuments like ascendant humidity that occurs upward because water migrates into the walls from different sources from the soil found in foundation. The experimental researches have been made in the basement of the Faculty of Mechanical Engineering from Craiova, which is a heritage building that was badly affected by the earthquake from 1977. The subsequent rehabilitation was unable to repair the damage of the building's foundation. ...

One of the main factors determining economic and social development of particular countries is availability of cheap energy source. In a case of European countries, this availability has also important influence on the integration process. Amount of produced energy in given country tells about the level of its civilizing development. Also so-called energy independence that most countries are aimed and which guarantees political independence is strictly related to this problem. It can be assumed, that energy is one...

The basic tasks of building and production sphere, housing and communal services are connected with life protection and comfortable conditions creations for people. In this way the automated control systems of distributed energy supply and life support facilities play an important part. The main scientific direction in this area is increasing their energy efficiency. Paper represents results of implementation of automated dispatch control systems of distributed energy supply and life support facilities that includ...

The paper presents the results of the research of horticultural dendroflora of the park located in the city center of Tuzla. By the mutual action of a series of natural-geographic factors in the wider area of Tuzla that belongs to the contact zone of the internal Dinarides and Pannonian lowlands, different types of soil have evolved. The most commonly are automorphic soils, which are up to 75% of the surface. The area of Tuzla City has the highest population density in the Tuzla Canton, that is 555 inh/ km2. The r...

We offer two approaches for construction of block lithosphere models. First is for selection of blocks in mantle only, it is applicable to both two- and three-dimensial models. Second method (3D) helps to select blocks related to known tectonic structures. Usual approach for tectonic maps construction is the gravity field analysis. However, this method is significantly limited because the gravity field includes integral information about density features in lithosphere. This makes impossible to split selected tect...

This article is dedicated to issues of commissioning of a small pumped storage hydropower plant in mine. Pumped storage hydropower plants are one of several ways to solve the problem of non-constant power consumption from the mains. This hydropower plant, we are going to deal with in this article, is located at Jeremenko mine in Ostrava, 580 meters below the surface of the earth. The entire facility is composed of Pelton turbine, Bibi's coupling and a generator of electrical energy. There will be described the iss...

Concrete structures exposed to water pressure, such as underground basements, water retaining structures and tunnels, have to be designed as watertight in order to prevent damage due to moisture or water ingress. The design and execution of watertight concrete structures is regulated by guidelines, nevertheless, after execution they may suffer from various failures. The most frequent failure is leakage of ground water through cracks. Major steps in the design process of watertight concrete structures are summarize...

The subject of thin seams exploitation is complex problem, and in reality it encounters several problems such as technical, ergonomic, and economic barriers. They refer mainly to combined longwalls where human presence is required at the site, and the most important problem is the issue of limited workspace in the longwall roadways. It generates engineering and organizational problems, especially during the launch and removal of the longwall roadways. Having considered the abovementioned, the Department of Mining,...

Development of energy, nuclear, engineering, petrochemical and chemical industry requires very massive and large workpieces. Requirements for machining workpieces of these department is the necessary adapt to the design and construction of machine tools. Analyses were conducted to carry out the overhaul and modernization for heavy cutting machine SKODA W 200 HC with digital subtraction, turntable S 100 C from 0 to 360пїЅ, while the carrying capacity of the turntable 100 t. The complexity of the repairs consisted o...

Currently, worldwide companies engaged in mineral processing are more and more interested in ecological transportation systems that do not effect and pollute the environment during their operation. One important element of such transportation systems is feeding station, which ensures the correct implementation of continuous transportation system. Proper functioning also increases the efficiency and reliability in transporting raw materials. The article deals with own 3D engineering design of the feeding and fillin...

The mining companies are often faced with the requirement for bulky material transfer which is possible to realize using overhead travelling cranes. An overhead travelling crane has rectangular work space, which is characteristic for this type of crane. A part of an overhead travelling crane is also a crane crab. Crane crab movement is carried out after the double-girder crane construction and loads are displacing along the whole length of the crane. The aim of this paper is a proposal of 3D geometric model of the...

The paper presents an automatic sorting process of different color pieces. This paper is the result of a multidisciplinary depth study focused on industrial automation field more specifically on robotics, informatics, or control of the flexible manufacturing systems. The hardware and software system is formed by a robotic arm, a color sensor, sensors, a conveyor, a system of outlet cubes and a storage system, a transporting system for the robotic arm. The goal of this paper is to remove cubes from the deposit use ...

In past decades design of experiments and simulation analysis have been recognised as powerful tools for resource efficiency improvement in various areas of technics and technology, especially for energy-consuming industries such as ceramics production. Silicon carbide ceramics is widely used for structural applications, yet production of such materials invokes high temperatures and sintering aids, thus it becomes an important task to carefully adjust ceramics compositions and methods of manufacturing. Promising s...

During the last decades, problems related to environmental pollution have become even more acute. Therefore there is a need for new sources of a clean energy. Steam reforming of alcohols, which are much morechemically active, proceeds at considerable lower temperatures. It is important also that alcohols produced from biomass (bio alcohols) can be considered as a renewable raw material. The aim of this work were the development of catalysts based on the complex oxides (ZrO2 - Al2O3 - CeO2) support and the study of...

The article deals with the design of new technology for the treatment of thin-walled house for carrier pipe conveyor drive roller. Production on conventional machine tool is unsatisfactory because of the failure of the machine tool and the actual production inaccuracies. Conventional machine tools are being replaced by numerically controlled machines CNC OS which allow reuse through production and higher labor productivity. They were designed and compared the new CNC axes of different structures, appropriate tools...

The introduction of energy dissipating devices as passive dampers in structural systems under earthquake excitation is intended to reduce structural deformation and in certain cases to reduce the risk of damage to equipment attached to the structural system. In seismic design, the input energy of an earthquake is typically dissipated through hysteretic behaviour of structural members, which allows the structure to undergo inelastic deformations without compromising the stability of the structure. The energy dissip...

The authors of this paper developed a concept that can be used for automatically car parking; the concept is based on finding the obstacle free spaces around the vehicle and it uses methods to guiding the car in an available found parking place. The car sensing system includes ultrasonic sensors to measure distances, proximity sensors to detect obstacles and a rotative position sensor to measure the vehicle displacements. A microcontroller based central processing unit (CPU) was used to process sensorsпїЅ informat...

Sewage treatment plants (STPs) have been constructed in most places to reduce the degradation of water quality and ensure a healthy environment. STPs are major investments due to the high capital required to build them as well as their high operating and maintenance costs. Small and isolated villages or settlements with low population densities can be served by decentralized systems, which are simple and have low costs. While functioning within general environment protection activities, wastewater originating from...

Producing energy from renewable sources represents an essential component of energy policies at a national level and it leads to important savings of fossil fuel and primary energy. According to the targets established by the National Reform Programme, Romania intends to obtain a rate of 24% sources of renewable energy from the total consumption in 2020. On this foundation, the challenge of renewable energy goes beyond assessing its future role. This article investigates the development of renewable energy in term...

Self-compacting fibre reinforced concrete summarizes both the advantages of selfcompacting concrete: reducing environmental noise pollution, faster construction time, improved quality of concrete surfaces etc., as well as the fibres benefits: better mechanical performance, ductile failure and so on. Self-compacting fibre reinforced concrete is not currently used in Romania especially due to the lack of normative research respectively the national regulations in this particular field. One of the national research p...

In this study, we present series of GPR experiments to identify and solve problems, which might be encountered while carrying out GPR survey in sandy soils for various purposes. Study was carried out in the Smeceres sils sand-gravel quarry, which is located in the Madona-Trepe ice-marginal ridge in Eastern Latvia. This specific quarry was selected as a study site, because it has a boulder pavement located in its uppermost part. Two similar experiments were carried out in dry (after long period of dry weather condi...

Steganography can be used for illegal activities. It is very important to be prepared. To detect steganography images we have counter-technique known as steganalysis. There are different types of steganalysis, depending on if the original artifact (cover) is known or not. In terms of practical use, most important are methods of пїЅblind steganalysisпїЅ, that can be applied to image files and because we do not have the original cover for comparison. This article deals with the application of neural networks on the ...

Passage form the idea to market is a long journey, which if it is appropriately planned, may bring satisfaction and success. On the other hand, implementation new technology on the market give a risk of grave errors committing at the stage of planning. The procedure of transfer may end with fiasco, even though the concepts were really innovative and interesting. In this paper determinants of geothermal water deironing technology commercialization has been presented. The developed technology has been not breakthrou...

The GNSS satellite technology is most commonly applied in the area of air, sea or land navigation. In case of land navigation, the GNSS satellite technology guarantees a designation of a real position of a vehicle in a kinematic mode. The aim of this paper is to present and describe the possibility of using the GNSS satellite technique for the recovery of the trajectory of a motor vehicle. The research experiment was conducted on the example of a Pathfinder Nissan car. In addition, on the rooftop of the Pathfinder...

The dispersion is one of the most important pollution transport phenomena, which is used in numerical water quality models. The dispersion rate is described by the value of the dispersion coefficient in the advection пїЅ dispersion equation. The most reliable way of determining the value of the dispersion coefficient is the field tracer experiment. The results of the field experiments are affected by various influences, which occur in the real flow conditions - one of them is the occurrence of transient storage zo...

This article identifies the special features of the preliminary designing of RoPax vessels. The hull geometric parameters have been defined as well as the functional parameters of the designed vessel, in consideration of the volume/capacity criterion. The preliminary assumptions have been adopted. T he preliminary calculations algorithm has been proposed, a statistical analysis has been conducted of hull geometrical properties of 20 similar vessels and the relationships reflecting the connections amongst them were...

Article contains results of studying of quality of water of the Shershnevsky reservoir. The relationships between water chemistry parameters and aquatic macrophytes Shershnevsky reservoir (Russia) were investigated. Data on water quality and species diversity of macrophytes obtained from field studies conducted during the last two years. We studied the physico-chemical parameters such as water and air temperature, pH, conductivity, dissolved oxygen and carbon dioxide, nitrates, nitrites, ammonia, phosphates, chlor...