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This work focused on study fractal structures on Venus is performed on the basis of observations taken by the ?Magellan? spacecraft (NASA). The equipment of this artificial satellite allowed scanning almost the entire surface of Venus using a radar with synthesized aperture of S-band (12 cm) and a microwave radiometer as well as investigating topography by the special radar ? altimeter. The uncertainties in some data produced by ?Magellan? were filled by the information that had been collected before ? in ?Venera ...

Effective operation within the company and swift decision-making are not possible without an organizational structure in line with an appropriate strategy, or without an approved division of power and job descriptions, i.e. without a professional formal regulatory system. However, in addition to officially accepted standards, there is always a kind of a set of rules for normative behavior in the organization, which arises as an alternative to the formality - informal relationships. In circumstances when the employ...

In the 21st century, the competitive advantage of many successful companies is great employees who work remotely. However, so far this has not been a common practice in companies in Latvia. Today, remote collaboration is a reality and often an economic asset provided by the World Wide Web. However, business leaders often are indecisive between remote and onsite teams to performing a given task. The events that started in the beginning of 2020 showed an extraordinary transition from onsite work to working remotely,...

One of the greatest challenges in restoring the urban landscapes consists in getting data as accurate as possible on the historically evolving landscape. This case study of the historical ensemble of Ciacova, Timi? County in Romania, presents the methods for interpreting data from particular historical and archaeological research that contributed to establishing the principles for the restoration of the ensemble. On the one hand, the research provides the necessary data for the restoration process, on the other ha...

The use of renewable energy sources as an alternative to fossil fuels is increasingly present worldwide. In this context, Romania has committed to increasing the share of solar energy at the national level. This is in line with the European Union's concerns about energy efficiency. The lowland and low hills of the southern and south-eastern parts of the country are the most suitable for such an approach. So is the south part of Prahova county, mainly in the plain unit, which occupies the southern third. Prahova Co...

The identification of the landslide preparation and development mechanisms is the key to the sustainable development of landslide and landslide-prone urban and mining areas. The understanding of the landslide preparation mechanism is necessary for landslide hazard and risk assessments and designing proper protection measures and monitoring. A new equation for calculation of a slip surface depth (of a landslide basis) was obtained, using slope morphological and soil strength parameters. A new elaborated approach fo...

The precise point positioning (PPP) method is a relatively young method of GNSS observations processing but it is already quite widespread in many cases. However, the processing of observations with this method using specialized software requires some experience and competencies. The advent of web services for processing the results of observations using the PPP method significantly simplified this task. This circumstance is especially important for workers in the cadastral sphere, and makes it possible to simplif...

Both surface but especially underground rescue activities in industrial environments presenting risk of explosive / flammable or toxic gases, are difficult because of major risk of fires or explosions in a very short time. Dense smoke can make rescue work even more difficult and time becomes an extremely important factor, especially when workers are caught in the affected area and it is assumed that they could be alive. The technological development of last years has allowed the miniaturization of equipment and oc...

This work focuses on the use of projective geometry methods to determine star positions produced on the basis of positional observations. As is known, projective geometry studies invariant projective transformations. The main feature of projective geometry is the principle of duality, which adds elegant symmetry to many designs. While the properties of the figures that Euclidean geometry deals with are metric, but there are figures that can be converted into one another by movement while maintaining the metric pro...

The structure of the Romanian Western Black Sea shelf has been studied before 1970 and described in publications that serve today as an important point of reference in the structural geology and geotectonic studies. After the year 2005, a new set of gravimetric data has been acquired by the Romanian National Institute of Marine Geology and Geoecology, that has been obtained by compiling over 13.400 km of profile measurements on the Romanian and Bulgarian offshore. By combining this newer data with an analysis on t...

Thermal dehydration of a natural hydrous ferric sulfate Fe(SO4)(OH)?2H2O was studied using x-ray-phase and thermal analyses. This mineral was found in the hypergenesis zone of the Khangalas gold deposit, Eastern Yakutia, Russia. A comparative analysis of the sample with known hypergenic hydrous ferric sulfates with a similar Fe2O3:SO3 ratio close to 1:1 was performed. The dissimilarities between the founded mineral and its possible polymorphs ? butlerite and parabutlerite are identified. The mineral is less stable...

In the current global context where we talk about the depletion of conventional fuel resources and their impact on the environment, we find that it is necessary to integrate renewable energy sources/resources in new constructions, but also adapt existing constructions in order to reduce energy consumption. This article presents a system with solar thermal collectors combined with PCM phase change materials. During operation, some of that thermal energy may be diverted to a storage system where it is maintained for...

The greatest destruction of the soil cover and natural landscapes occurs during the development of the field by open pit mining. As a result of the development of the field, a complete change in the relief occurs, disruption of water and air balances, which leads to disruption of the ecosystem as a whole. To stabilize the state of the environment, it is necessary to implement a set of environmental, economic and social measures to restore environmental components. In this case, it is necessary to take into account...

During a mine exploitation, the activity of the mine shafts must be carried out under outstanding safety conditions, given that through them we carry out the transport of personnel and materials necessary for the production process and we extract mineral substances. For these reasons, the operating parameters must be within the limits provided by specific regulations, both in the case of supporting and guiding elements of the shaft, as well as those of the extraction plant. The labor protection regulations provide...

The article analyses the current state of flood protection of the urban area in the foothill region. Problems of the area were characterized through selected critical points that support the local flood origination. Of course, the flood is a random phenomenon and its behaviour depends on many other factors, such as soil saturation, vegetation cover, river bed channel current state, as well as drainage cuts, soil management, etc. For efficient design of the flood protection measures, it is necessary to have input d...

The UNESCO Convention on the Protection of the Underwater Cultural Heritage, adopted on 2 November 2001 is an international treaty aims to saving the underwater cultural heritage. Romania have joined the UNESCO Convention on the protection of the underwater cultural heritage in July 2007. The Western Black Sea shelf has been defined entirely as an archaeological site. Based on complex geological, sedimentological, stratigraphic studies and determinations of absolute age [2, 6] it was argued the existence of a cycl...

The aim of the study is to give the evidence that the formation of students' cognitive initiative as a part of integrative personality development by means of a foreign language becomes a defining factor in training a competitive specialist. A sufficiently high level of mental development, a strong memory, having the logic for reasoning, broadening one's horizons, working capacity, perseverance, etc. ? all these contribute to student?s success. However, even with all of these qualities, it is necessary to constant...

The article considers the issues of evaluating the quality and effectiveness of an information resource with Internet access dedicated to memorable places associated with the residency of famous Russian personalities. The authors noted that one of the problems is choosing the indicators and evaluation criteria that characterize the effectiveness and efficiency of museum activities, as well as the impact of museums on society. The following main functions of museums are highlighted: collection, preservation and doc...

The article examines the issues of virtual reconstruction of memorable places associated with residency and activities of V.F. Voyno-Yasenetsky (Saint Luke the Surgeon) in the city of Tambov (Russia). Valentin Felixovich Voyno-Yasenetsky (1877-1961) ? a religious figure, archbishop, famous Russian and Soviet doctor, doctor of medical sciences and theology, winner of the Stalin prize of the first degree. In order to visualize individual objects of memorable places in Tambov, their three-dimensional virtual reconstr...

Most of the time, in assessing a situation where a leakage of combustible gas is involved, the volume of the room where the release occurs and the volume of the released gas is taken into account, thus resulting in an average concentration of the fuel gas applied to the entire volume of the room. In some cases, when the source of combustible gas is close enough to the source of initiation, or when air currents converge at the location of the source of initiation carrying amounts of combustible gas, the explosive m...

Objects of geological heritage of international level are located in the Nizhny Novgorod region. This is the Puchezh-Katunki impact crater of an early Jurassic age, the Bathonian-Callovian deposits of the Jurassic system near the settlement of Prosek on the banks of the Volga and karst lakes and caves in the basin of Pyana and Tyosha rivers. A water induced risk assessment was carried out to include it in application for aspiring UNESCO Geoparks network. The assessment includes the risk of landslides, abrasion of ...

Due to the changes in global climate patterns, wildfires have recently become a significantly greater threat to both human settlements and the corresponding activities. The same degree of threats is applicable for numerous species of fauna and vegetation, all across the world, especially in arid climate areas. Scientists that have conducted research on the subject revealed that climate significantly influences the probability of certain areas towards being affected by wildfires, especially taking into consideratio...