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The early 21st century is a time when unmanned surface vessels (USV) are used in various measurement applications. Modern autonomous and unmanned vessels are increasingly often used in bathymetric measurements whose aim is to measure the seafloor with the sufficient positioning accuracy. Therefore, the use of USVs in hydrography can be seen as the beginning of a new era in this regard. This paper presents bathymetric measurements with the use of an unmanned surface vessel in waterbodies of the Republic of Poland w...

The water quality assessment on chemical and biological indicators of the Kuibyshev reservoir (Middle Volga, Russia) and the rivers ? tributaries of 1 and 2 orders was carried out. Based on the results of hydrobiological research, modal intervals of the total number of zoobenthos were calculated, as well as the proportion of oligochaetes in the community and the Woodiwiss index. The Woodiwiss index was used as the indicator of water quality on the base of characteristics of benthos community. The method of redunda...

The investigation of cellulose-based aerogel production and its application to oil product clean up from the water surface was performed in this research work. Three kinds of aerogel with 2.5, 5.0 and 7.5 wt. % of cellulose have been produced. The analysis of aerogel's maximum sorption capacity as well as its regeneration for sorption of crude oil, marine diesel oil (MDO) and biodiesel sorption from water surface were performed during this study. It was found that the best sorption properties have 7.5 wt. % cellul...

This paperwork makes an analysis of the influence that the noises and the vibrations have on a biomechanical model on the human body at different frequencies. Besides the harmful influence on the hearing acuity, the noises have also a harmful effect on the organism through the appearance of some changes on the physiological balance. Driving the car generates noises and them being received by the driver is done consciously, with pathological implications long-term. The harmful effects of the noises are amplified by...

The main aim of the work is to determine the distribution of waste mass in the process of mechanical transport on sliding, reciprocating and cylindrical grates. The mass distribution in a layer on the grate is caused by the loss of the waste material during combustion. The work uses the formulas from the literature describing the mass transport of waste on the grate. The scope of the work did not include experimental investigations of waste incineration in a layer on a grate, on a laboratory scale. The results of ...

The article devotes to development of mathematical model of sawdust briquetting process, establishing relationship between the briquettes density, the moulding speed and pressing effort. The study uses elastic-viscous-plastic Bingham body stress-strain equation as a rheological model of the sawdust being briquetted, the model parameters are non-linear functions of the sawdust density; classical Runge-Kutta method was used for solving the nonlinear differential stress-strain equation. The calculations results show ...

In this paper, a mixture PVC/PHB was filled with a natural filler, such as wood flour (WF), was investigated. These polymeric composites were obtained by rolling. Thermal, thermomechanical and mechanical properties of polymer composites based on PVC containing various amounts of wood flour are studied. It has been determined by differential scanning calorimetry method that the glass transition temperature of PVC decreases with a decrease in the percentage of PVC in the mixture. For these composite materials, the T...

The topic addressed in this paper is related to two waste management (poultry manure) objectives: reducing environmental impact through combustion, and energy generation. Poultry industry waste is produced in large amounts and cannot be always used as a fertilizer. Its storage needs large sites, but if they are improperly designed could affect the phreatic groundwater. The paper is organized as it follows. The first part presents the energy characteristics the waste samples analyzed (they come from a poultry farm,...

Pressure cylinders are commonly used in industry and in health services as well as in laboratories, ordinary households, and accommodation facilities. Their usage, however, is collocated with considerable risk during filling, transporting, and usage, as well as storing. The risk is predominantly influenced by the type of gas inside the pressure cylinder. Gases inside the pressure cylinder can be liquefied, compressed or dissolved. If the cylinder containing gas is exposed to a higher temperature or fire, destructi...

The study of soils in the vicinity of medieval settlement that has only one stage of anthropogenic impact at 5-8th centuries AD was established. For comparison, fertilized soils within the modern rural household were investigated. In order to study the microbiological properties of the soils in either case, series of soil pits were made at different distances from the settlement: in the area of regular manuring, in the area of episodic fertilization and in undisturbed areas. The determination of the number of ther...

Thin-layer chromatography is a useful and environmentally friendly analytical tool still with potential for the future. As a planar chromatographic technique has a wide spectrum of applications and it can be complimentary to other chromatographic techniques like, for instance, high performance liquid chromatography. Separation on thin-layer was performed for the very first time by Izmailov and Shraiber in 1937-1938. They called the new technique spot or drop chromatography and used it for separation of selected pl...

The dynamics of the development of modern society dictates new requirements for the creation of a sustainable workspace or eco-friendly office. The functional state of the human body is an indicator of environmental friendliness of the working space. Therefore, a Green office is not only the creation of a comfortable, ecological space, ergonomic workplace, but also taking into account the whole complex of factors that can negatively affect the functional state of the organism. In modern society, a person has to li...

The changes of the welfare of the Russian citizens are explored in the paper. The time diapason taken into account is: 2000 ? 2018. The monthly wage index based on the Dynamic series of macroeconomic statistics of the Russian Federation data (2000-2018) has been explored. The mathematical models of the wage index of this time period have been presented. They are based on the ARIMA (p, d, q) models with p, q less than or equal to 5 (Autoregressive integrated moving average). Forecasts of these models are compared t...

Wind power, via wind turbine, transforms mechanical energy to electrical energy. It is an alternative to burning fossil fuels, it is plentiful, renewable, widely distributed, clean, produces no greenhouse gas emissions during operation, consumes no water, and uses little surface of land. The net effects on the environment are far less problematic than those of fossil fuel sources. This paper proposes a forecasting model based on time series technique for wind power energy generation. The increasing use of renewabl...

The concept of bioeconomy began to actively take shape in the world in the mid-2000s, when the Organization for Economic Cooperation and Development (OECD) and the European Commission (EC) began to develop programs to promote the bioeconomy in different countries. Documentation in the field of bioeconomy is a challenge for research, as official statistics report data on traditional sectors without distinguishing between synthetic and biological production. Therefore, indicators for the bioeconomic field are curren...

The most pronounced observed climate change is the rising surface temperature of the Earth. In view of extreme weather events, existing risks and possible consequences, adaptation to the adverse effects of climate change has become a global challenge in recent decades. The interaction between climate change and its possible consequences is a complex and very dynamic system that needs a great deal of information to be properly managed. These facts were also reflected in the Council of the European Union, which appr...

The present paper comprises a complex topographic survey for the identification and registration of a farm type immobile consisting of company headquarters, stables, silos and concrete slabs for registration in the land book. The farm where the topographic works were executed is a farm specializing in the breeding and fattening of buffaloes, the production of milk and its processing. It was set up in 2007, and the initial constructions were built between 2007 and 2015. The farm is located at the entrance to Pecica...

Nowadays, according to the current century, the one of speed and information, the way of calculating the volumes of aggregates is desired to be much faster and more accurate in every aspect. The volume designates the property of a body to have three-dimensionality, that is development along three perpendicular axes on which the length, width and height are measured. All three those dimensions are actually length values that define the place which that object occupies in space. The theme of the project is to calcul...

This article describes the key features of the automatic speech recognition systems training process that can be used in a work of chat bot or voice assistant. Importance of research in this area is grazed. Difference between chat bot, voice helper and voice assistance are explained. Basic requirements for correct chat bot usage are formulated. Some common automatic speech recognition systems are reviewed. Kaldi and CMU Sphinx has been used as an open source systems? example. The whole installation and training pr...

At the Moscow University of Geodesy and Cartography (MIIGAiK) a new approach to learning C++ programming for students specializing in cartography and geodesy was developed. The training programs in C++ for students were written. Programs with geodetic content prepare students, future surveyors and cartographers to solve their specific tasks more purposefully than common standard programs and tasks. One of those programs calculates the plane rectangular coordinates of an additional searched point according to Gauss...

Krasnoyarsk Territory is a region of Russia, where the diversified economy of the country is represented. There are mining, metallurgical, petrochemical, timber, woodworking and other industries. Such a developed infrastructure of the economy provides stable needs for qualified specialists-engineers, technologists, power engineering specialists. It is clear that the system of higher and secondary vocational education is aimed at training personnel who are ready to participate in the regional development effectivel...

The problems of geodynamic safety assurance in mining are common for many countries with developed mining industries. Considerable results have been achieved in Russia in solving rockburst problem, yet in the last decades this problem is transforming into man-triggered seismicity problem. Induced earthquakes in areas where mines had been flooded, seismic activity in previously safe regions, re-activation of tectonic faults, violent man-triggered earthquakes in open pit operations have been registered. As a matter ...

The calculation of wave height, - length and - period changes which result from trans-formation by currents and bottom are needed when solving engineering problems of sea and river hydraulics. It is possible to carry to number of such problems also a problem of construction and operation of sea channels which has big economic value. Modern sea channels can have width several hundreds of meters and difference of depths on the way to the channel and on an axis of the channel twice and more. Therefore, in calcula-tio...

In technical literature many specialized scientific materials are available which treat the elimination of solids and oil from water injection, the newest approaches being oriented towards the process with low power consumption as with most modern facilities in order to improve the available technologies. For groundwater, the analyzes that are carried out are to determine the degree of pollution with liquid or gaseous petroleum products. The natural state of the underground water is influenced by the characteristi...

Excessive iron causes hygienic and technical defects in the supply of drinking and service water. Even small iron concentrations can cause excessive bacterial proliferation, which, from a hygienic point of view, adversely affects the properties of water, such as turbidity, color, taste. In the case of small water sources, it is not appropriate to use demanding technological assemblies. Adsorption to a suitable adsorption material is most commonly used for water treatment. Compared to synthetic zeolites, the afford...

Forests and the land where the forests grow are some of the key natural resources in Latvia. Forests occupy half of the total area of Latvia. Unlike other countries where deforestation is a problem, the forest area increases in Latvia owing to natural and artificial afforestation activities. The paper analysed changes in the reforested and afforested areas in Latvia in the period 2007-2017 and found that the most essential factors contributing to the reforestation and afforestation were national and European Union...

The objective of this paper is to analyze the performances (capacity factor, rated capacity, operating capacity, annul electricity production) of some of the most used wind turbines in nearshore and offshore operations. The target area of this study is the Black Sea. More precisely, twelve points were chosen for this analysis. The wind fields (zonal and meridional velocity at 10-meter height) from four datasets were used to assess the wind turbines performances. The first one is ERA-Interim. This dataset is a glob...

Volatile organic compounds (VOCs) play an important role in the IAQ evaluation process. Chemical contaminants emitted by dry building material and indoor equipment influence long-term indoor air quality. VOCs adversely affect both occupant comfort, productivity and health. Most of the health hazards related to VOCs emissions occur during the first months of occupation or after refurbishing the building. At present, most people generally spend up to 90% of their daily time in the indoor environment. Humans spend al...

This paper depicts the early phase of development for an integrated system tailored for emergency response actions and remote sensing. This paper focuses on the support system envisioned as an integrated Unmanned Aerial System (UAS) system that consists of one or more ultralight multifunctional aerial units with a configuration that can be adapted to the nature of the intervention: monitoring, mapping, observation and logistics etc. Starting from wing airfoil and material selection and ending with the experimental...

Modernization of the real estate cadastre is a set of technical, organizational and administrative activities aimed at gradual improvement of the quality of data collected there. In the real estate cadastre's database, the key importance to the quality is whether the accuracy of the location of objects corresponds to the assumed formal and legal purposes and the expectations of users. The accuracy of determination of coordinates of border points has a direct impact on the uncertainty of area estimation, which is a...

The purpose of this research is the treatment of Domanik shale oil (DSO) by supercritical water conditions. The experiments were carried out at 400 oC and with different residence times at 140, 300 and 480 min. The DSO is powdered and mixed with distilled water then loaded in the batch reactor and they were heated until reach the desired conditions at 400 °C and of 265.9 bars. The results reveal a great dependence of the product yield and quality at the residence time. Similarly, the obtained products were analyze...

At present, heavy oil and natural bitumen in supplying the world?s demand for fuels and petrochemical feedstock is increasing, because of the reduction of light traditional oil reserves. Heavy oil is characterized by its high viscosity, which creates difficulties in it?s productions as well as transportations to refineries. Currently there are several ways to reduce viscosity of heavy oil to facilitate the extraction process. One of the most important methods is steam injection, but with the passage of time, this ...

As a big agricultural country, China is experiencing rapid urbanization, and urban agriculture plays a very important role. In this paper, we collected the basic agricultural economic data of the Changsha-Zhuzhou- Xiangtan City Circle, one of the nine urban clusters in the Yangtze River Economic Belt in south-central China with a vital role in grain production, and constructed-16 indicators to evaluate the production-economic function, cultural leisure function and ecological function using geography model and 1KM...

The last century is characterized by rapid development of cities, agglomerations and urban areas. Urban space needs to serve a variety of human needs: housing, working, social interaction, leisure, and mobility of persons and goods. Human beings also need nature within their living areas; green spots for recreation and relaxation. Trees, parks and other greenery helps provide healthy living conditions by cleaning the air of pollutants, absorbing noise, and regulating humidity. Beyond this direct anthropocentric (h...

Very large trees are considered as key green structures in an urban green infrastructure. Due to the general focus on old and very large trees (with high aesthetic values in green urban areas), there is a significant knowledge gap related to the role of young trees in cities. This study is based on results of field mapping of cultural important trees in the urban area of the famous European historical city of Prague. We have investigated both very large and young trees ? just only trees with function of living sym...

A dangerous problem that many countries have to face is the existence of buried explosive devices, responsible for high numbers of civilian fatalities. Their detection and removal are therefore mandatory, which has led in recent years to the development of different techniques that can ensure safer and more efficient demining operations. Geophysical techniques have been employed, since allow ground search in a non-invasive, rapid and cost-effective way, with special interest being given to ground penetrating radar...

The article discusses an urgent problem of designing systems for ship ballast water (BW) treatment ensuring high efficiency at low power consumption and small mass and size. Transportation of invasive organisms with ballast water presents a serious danger for the world ocean. According to the International Marine Organization (IMO), the BW global turnover reaches 12 billion tons annually. A number of species of aquatic organisms transferred daily with ballast water exceeds 7,000. Many of them not only survive in b...

In this paper, the artificial neural network (ANN) technique is used to predict the wear resistance e under dry sliding conditions of some iron-based powder metallurgy materials subjected to a thermochemical treatment. The analyzed specimens were obtained using the conventional powder metallurgy route: mixing the raw powders with 1% zinc stearate, cold compacting at a pressure of 400 MPa and sintering at a temperature of 1150°C for 60 minutes. Following the sintering step, the specimens were subjected to carburizi...

Microorganisms are ubiquitous in nature and possess unique biochemical possibilities to assimilate a vast array of available substrates and produce unique se metabolit and biotransformation pathways. Long-term exposure to elevated arsenic and antimony concentrations has led to the selection of specifically resistant autochthonous microorganisms. In the cultivable component of isolated bacterial microorganisms, Bacillus was identified as the dominant genus, which has been represented by nine species. Interesting ph...

A passive method is proposed in this research for minimization of the temperature drift of a strapdown inertial navigation system with fiber optic gyroscopes and accelerometers by means of reduction of the temperature differences between the structural components of individual gyroscopes as well as between gyroscopes and accelerometers. For this purpose, theoretically possible use of nanostructured composite materials based on carbon nanotubes and characterized by increased thermal conductivity in individual struc...

This paper aims to find the influence of the climate on the travel behavior in various geographical areas of the Czech Republic. The travel behavior is to be represented by the modal split of two main groups of travelers ? work commuters and school commuters. The basic geographic areas to be used for the analysis will be the territories of various municipalities. The climate is defined by average annual temperature and average annual precipitation, both from the period 1991 to 2010. Both climatic conditions are av...

Nowadays, when the whole world is increasingly engaged in environmental protection, it is necessary to come up with a fuel alternative for transport, which means generally abandoning the use of non-renewable resources (fossil fuels), as they are one of the many factors influencing the emergence of greenhouse gases and its associated global warming. In today's Europe, pressure is being put mainly on automotive companies, to search for sources other than conventional fuels. At present, there is a big boom in the are...

When teaching in schools, especially in vocational subjects, it is very important to attract and motivate students to work independently, not only to remember important facts, but also to develop their ability to seek new solutions independently. One of the active assistants in achieving this goal can be the active use of information technology that is close to the current young person. In addition, it is essential not only to learn new knowledge in education, but also to educate them towards an active approach to...

The article deals with the impact of global climate change and temperature warming up on emission production during en-route flight. Consequently, analyses the effects of carbon dioxide gases production on the environment and ecology. The main aim of this article is to do research the amount of emission (CO2) production during flight in different meteorological condition and make an evaluation of how it can affect the global climate change, ecology and greenhouse effect. The theoretical part of the article focused...

This research deals with the aspects of use of the heat balance method for calculation of three-dimensional non-uniform non-steady temperature fields of complex optoelectronic systems through the example of a measuring unit based on fiber optic gyroscopes and microelectromechanical accelerometers. The main principles of and approaches to development of a mathematical model of the temperature field of the unit under consideration on the basis of the heat balance method have been set forth. The adequacy of the devel...

Relevance of results. Mining is one of the priority directions of development of the Russian industry. In this regard in structure of waste in Russia waste of production and quantity them prevail grows. Therefore the problem of definition and economic assessment of the directions of use of waste of production is relevant now and is an important component of the organization of circular economy and rational use of resources. Research objective. To analyse a problem of intensive formation of waste of production and ...

The increasing computing power of modern hardware systems opens new possibilities for simulating complex solidification phenomena as well as the overall simulation of the casting process. Although the simulation of filling and solidification can be considered to be state of the art, the simulation of residual stresses and distortion is still the object of intensive research. Distortion is one of often found problems of castings, especially large castings with thin sections such as frame shape or those with curved ...

Nowadays, natural risks associated to geomorphological processes represent a widely studied topic by geoscientists due to their impact on society. In this category, landslides take an important place, representing major risks to human activities, which often lead to economic losses and numerous fatalities all over the world, especially in equatorial, tropical and sub-tropical areas. In Romania, landslides are a common and frequently encountered geomorphic phenomena in plateau regions, that need to be identified an...

Aim of this paper is the usage of metadata satellite images to accomplish an atmospheric and topographical correction of these images. The atmospheric correction is since there are particles in the atmosphere that scatter solar radiation, so that the receiver records together with the reflected radiation from the target and the result from the scattering in the atmosphere, with the result that the target in the image is brighter than it is. There are several ways to estimate the atmospheric correction, the most im...

Digital elevation models play a crucial role in the analysis of complex spatial challenges. Given the international dimension of many environmental applications, elevation data have been integrated in the European INSPIRE directive (Annex II, Elevation theme). As a result, many types of data are offered in various formats by mapping agencies and governmental organizations within the European Union. Notwithstanding the national effort to publish these data under open and public licenses, and in compliance with inte...