Historical Outline of Iron Mining and Production in the Area of Present-Day Poland

The article presents the history of iron ore mining and production in present-day Poland and takes into account mining and production techniques and the influence of mining on the development of the surrounding areas. Examples of development are presented for the most important iron ore mining centers established since the period of the so-called Roman influences—Lower Silesia in the region of Tarchalice and the Świętokrzyskie region in the area of Góry Świętokrzyskie (Świętokrzyskie Mountains). The oldest traces of underground iron ore mining in Poland date back to the 7th–5th century B.C., and iron production dates back from the 1st century B.C. in the Częstochowa region where economically significant iron ore exploitation started in the 14th century and lasted until the 20th century. Studies showed that the development of iron ore mining in today’s Poland was associated with significant events in the country’s history, for example, with the expansion of a network of fortified castles in Silesia or with the industrial revolution. In each case, the increase in iron production resulted in the development and growth of the surrounding areas.

Economic Assessment of Options for Prospective Development of Production Subsystem of Export-Oriented Coal Companies

The authors review the challenges and trends of the Russian coal exports and describe fields that are potentially attractive for exports in the new coal mining centers in the East of Russia. A conclusion is made that the only option available for the Russian coal industry in the eastern parts of the country is the export-oriented sustainable development in conditions when the global coal trade is shifting towards the Asia-Pacific region. Scientific and methodological support for the implementation of investment projects of Russian coal companies has been developed for the new economic conditions. The economic and mathematical model is proposed to assess the options of perspective development of production subsystem of an export-oriented coal company, which helps to define the parameters of a rational option to develop the coal sector including the volumes of annual expenses of investors to obtain the highest revenue from coal export.

Increasing the efficiency of Russian uranium mining enterprises in conditions of excessive supply

The article describes the current situation in the global uranium concentrate market, explains the reasons for the formation of an excess amount of finished goods and the subsequent decreasein prices. The authorsevaluated the prospects of using market mechanisms to improve the financial results of Russian uranium mining enterprises. The location of the main mining centers in comparison with the centers of consumption of finished goods, pricing for the products of uranium mining companies, the dynamics of price changes over the past 20 years, the influence of non-market factors on the supply of finished products are analyzed.This study led to the conclusion that the expectation of changes in the market situation is not viable in a long term. The authors outlined the direction to improve the profitability of mining enterprises by introducing technological changes aimed at reducing the cost of the final product.

False Alarms Analysis of Wind Turbine Bearing System

Wind turbines are complex systems that use advanced condition monitoring systems for analyzing their health status. The gearbox is one of the most critical components due to its elevated downtime and failure rate. Supervisory Control and Data Acquisition systems are employed in wind farms for condition monitoring and control in real time. The volume and variety of the data require novel and robust techniques for data analysis. The main novelty of this work is the development of a new modelling of the temperature curve of the gearbox bearing versus wind speed to detect false alarms. An approach based on data partitioning and data mining centers is employed. The wind speed range is divided into intervals to increase the accuracy of the model, where the centers are considered representative samples in the modelling. A method based on the alarm detection is developed and studied together with the alarms report provided by a real case study. The results obtained allow the identification of critical alarm periods outside the confidence interval. It is validated that the study of alarm identification, pre-filtered data, state variable, and output power contribute to the detection of the false alarms.

Kuzbass-2035: the territory as a driver of economic growth

The article considers the necessity to transform the existing economic development model of Kuzbass – the leading coal mining center in Russia – due to the increasing external risks, the problems of the coal sector in Russia as well as the adaptation of the region to a new reality. The author identifies five key factors of influence: decarbonization of the world economy; a fall in coal prices; the COVID-19 pandemic that has triggered the global crisis; long-term reduction of coal consumption in the Russian Federation; the formation of new coal mining centers in eastern Russia. As a result, based on a change in coal production in the region, three scenarios for the development of the coal industry and the economy of the Kemerovo region as a whole have been proposed. According to the author, with the existing regional model, the most likely scenario for Kuzbass in 10-15 years is a shock scenario, i.e. due to the decrease in global demand for hydrocarbons coal production in Kuzbass is expected to drop by 70-100 million tons per year, which could provoke a deep socio-economic crisis in the region. To avoid negative economic and social outcomes, it seems advisable to immediately start renovation of the Kuzbass economy with active participation of the state on the basis of a new reading of the model of territorial production complexes (TPC) which was successfully implemented in the region in the 20th century. The role of the basic industries of modern TPCs of the Kemerovo region can be assumed by clean coal technologies, petroleum chemistry and oil refining. At the same time, the author emphasizes that the restart of the model for the development of regional economy is possible only if the businesses (the owner of production assets), the government and the society reach the agreement and share full responsibility for the renovation processes of the resource territory.

Population and Epidemics North of Zacatecas

The development of demography for northern New Spain in recent years has relied on parochial archives that are the most accurate records for estimating the incidence of epidemics. Included here is a general survey of the studies on demographics of the North of New Spain, specifying the methodology chosen to track disease episodes and determine their routes of propagation. The impact of epidemics was not the same in the different northerly regions. In fact, the chronology of outbreaks shows that the Northwest and the Northeast did not face the same calamities as the North Central area. However, the mobility of the population and the forced transfers of Indians toward mining centers complicate the research because population growth may not be due necessarily to endogenous causes. In addition, the appearance of epidemics may be underreported, especially those outbreaks affecting peoples beyond the Spanish domination.

Retos Historiográficos En La Historia De Los Pueblos De Indios De La Región Minera Pachuca-Real Del Monte

ResumenEn este artí­culo se efectúa un balance historiográfico acerca de los estudios de corte diacrónico que tratan la zona de Pachuca y Real del Monte en el actual estado de Hidalgo. Encontramos que uno de los principales temas analizados por los estudiosos es el de la minerí­a, y la temporalidad que abarcan dichas investigaciones en su mayorí­a se concentra en el siglo XIX; los especialistas han dejado de lado la historia virreinal de la región en temas anexos a la minerí­a, aunque no exclusivamente mineros, como la participación indí­gena en el abasto de los centros mineros y la presencia de población afrodescendiente, por mencionar algunos temas. Se propone la ampliación del alcance de las investigaciones a asuntos no explorados en la región como el comercio y abasto doméstico de los trabajadores ligados a la mina.Palabras clave: Historiografí­a, Pachuca-Real del Monte, Comercio indí­gena. AbstractIn this article a historiographical balance is made on the studies of diachronic cut that treat the area of Pachuca and Real del Monte, in the present state of Hidalgo. We find that one of the main topics analyzed by the scholars is mining, and the temporality that these investigations cover mostly is concentrated in the nineteenth century, but has left aside the viceroyal history of the region in issues attached to the Mining, but not exclusively mining, such as indigenous participation in the supply of mining centers and the presence of Afro-descendant population, to mention some issues. It is proposed to extend the scope of the investigations to issues not explored in the region, such as the trade and domestic supply of workers linked to the mine.Key words: Historiography, Pachuca-Real del Monte, Indigenous trade. [1] Licenciada en Etnohistoria, maestra y doctora en Antropologí­a Social; Profesora Investigadora de la Universidad Autónoma del Estado de Hidalgo.