Six isolates of Trichoderma spp. (belonging to species; Trichoderma harzianum and T. longibrachiatum) were applied as seed or soil treatments to suppress damping-off of seedlings of ten cotton cultivars under greenhouse conditions. In most cases, cultivar x isolate interaction was a highly significant (p < 0.01) source of variation in the tested seedling growth parameters: incidence of disease, seedling height, and seedling dry weight. This interaction implies that a single isolate of Trichoderma can be highly effective in controlling the disease on a cotton cultivar but may have minimal efficiency in controlling the disease on another cultivar. It was also found that, in most cases, cultivar x isolate x application method was a highly significant source of variation (p < 0.01) in the tested growth parameters. Cotton cultivars showed differences in the disease reaction to the biocontrol agents. In the experiments evaluating the Trichoderma antagonists and their effect on seedling disease, a highly significant (p < 0.01) experimental treatment interaction was found. This interaction suggests that the outcome of cultivar x isolate interaction is markedly affected by the application method. Thus, the application method should be chosen to maximize the outcome of this interaction. The degree of the control of seedling disease in cotton differed according to the isolates of antagonists, the application method and cultivars.
This article deals with the problem of the knowledge’s utility. This issue is considered from three perspectives. The dualistic perspective is based on the two-component structure: knowledge–reality; the subject–the object. In this regard, the knowledge’s utility is measured by the measure of the power that can be obtained over the world. From the monistic perspective knowledge is useful if it allows the internal improvement of the bearer of the knowledge. Knowledge in terms of the emergent system arises in the fluid cognitive relationship between components of changing system. Relations between the system (whole) and units (part of ) are variable and undetermined by the specificity of the individual components which are also reciprocal and mutually forming.
This paper is an attempt to explain the concept of emergence of spatial systems. It indicates basic features of this concept, such as: coevolution, selforganization, patterns, sudden changes, hierarchy. The emergence of complex systems is very fruitful approach to the theoretical reconstruction of the processes of space economy. It should be included in the discussion on evolutionary economics and geography. Recently, in both disciplines creative research is carried out on this subject matter.
This paper presents a set of concepts aiming at the reconstruction of mechanisms of economic space development. These concepts are ordered in the way that consecutive concepts add new pieces of knowledge increasing the degree of cognition of the mechanisms of the economic space. This set includes among others: a shift from one steady-state to the next steady-states, self-organization and the development far from equilibrium, multiple equilibrium, punctuated equilibrium, innovation in the phase transition, a pulsative course of the development process, an emergence of complex spatial systems, a development code of the system of regions.
Poland’s economy is closely connected with European markets, particularly within the European Union: almost 90% of Polish commodity export goes to European countries and 80% is absorbed by other EU countries. The common European market is absorptive, safe and stabile, and goods and services sold there are duty free. But the high concentration of exports in this market implies a strong dependence on the modest growth dynamics and local fluctuations of demand, while reducing the gains that could be obtained from the presence in emerging markets which include several large and rapidly growing developing economies. The paper gives a general characteristics of those markets, including the information on their economic and population potential, and their place in the world economy – at present and in the future (according to current statistical data and long-run forecasts). The statistics of Polish foreign trade indicates a very small share of emerging countries in the geographical structure of Poland’s exports. The author describes the chances and threats combined with export expansion to these markets, emphasizing that the net balance of benefits and risks is clearly positive, which should encourage Polish enterprises to take a more active part in trade and cooperation with those countries and regions.
Emerging technologies represent the direction of the new industrial revolution of promoting sustainable economic and social development, and strategic emerging industries have developed rapidly in China. The development of these emerging technology industries requires more mineral resources as raw materials, especially the need for specific minerals, has increased. The unsatisfied growing demand for minerals used in emerging technologies or an unexpected supply disruption in major producing countries could have an impact on economic development. There are only several studies on the supply of mineral resources from the perspective of mineral resources needed by the development of China’s emerging industries. To assess the criticality of the minerals needed by the strategic emerging industries in China, this paper adopts three indicators: import concentration, the volatility of prices and the application requirements by the Chinese 13th five-year plan dedicated to strategic emerging industries in 2016. Furthermore, 34 types of nonfuel minerals and mineral raw materials are separated into three categories. Finally, this paper indicates that the three indexes are all high for 8 minerals with supply risks, application in emerging technologies, and substantial market fluctuations which need the support of special policies. Two indexes of three Level-II indicators are high for 14 minerals which need different policy combination measures, and one index is high for 12 minerals which also needs attention, all of which were analyzed.
The iron ore mine owned by the state concern of Luossavaara – Kiirunavaara AB-LKAB state concern has several mining skip shaft hoists for drawing iron ore. Despite using modern systems to secure the travel of these hoists in line with the Swedish regulations, units intended for the emergency breaking of vessels must be used in the so-called free travel paths in the tower and in the shaft sump. The paper discusses the main requirements that, in accordance with the Swedish regulations as regards the operational use of mining shaft hoists, must be met by devices of this type and a solution was proposed for a structure design of the braking unit for the mining shaft hoist installed in the B-1 shaft in the Kiruna mine. The frictional braking system in the form of moving bumping beams was decided to be used in the said hoist, developed in the Cable Transport Department in the University of Science and Technology in Krakow. The action of moving bumping beams consists in these beams, placed at the beginning of free travel paths, not only braking the rushing hoist vessels but also (with the integrated units for vessel capture) performing the function of grips. They secure the vessels against falling down into the shaft after the finished braking process. The advantage of such a solution is that the structural elements: the guiding shank of the tower, the head of the vessel and the bumping beams, transfer many times lower values of dynamic forces at the time of the strike of the vessel against the moving bumping beams when compared with dynamic forces arising at the time of the hit of the vessel against the fixed bumping beams. In the process of designing moving bumping beams, braking simulation is an important stage conducted with a computer program developed in KTL AGH. This program enables the modelling of load-bearing and balance ropes as flexible elements with elastic and suppressing properties. The results of these simulations, especially in the scope of the achieved braking deceleration of the vessels, the values of braking distances and forces in the load-bearing ropes are crucial in confirming the correctness of the assumed concept of the emergency braking system. The braking units in the form of moving bumping beams have been executed by the Polish company Coal-Bud Sp. z o.o. and are now being integrated in the tower and in the shaft sump of the B-1 shaft of the Kiruna mine in Sweden.
A large amount of solid and liquid wastes produced by mines and mills each year needs to be managed and minimized by alternative disposal methods like paste and dry stack. Increasingly strict environmental legislation and cost competitiveness also dictate the utilization of technically suitable, economically viable, environmentally acceptable, and socially responsible techniques. This paper reviews some of these techniques that could potentially reduce large volumes of mine wastes (with a focus on mine tailings and waste rocks) without causing significant environmental hazards. The new emerging techniques such as environmental desulphurization, covers built with sulphide-free tailings, co-disposal of tailings and waste rocks, geotextile tube dewatering, and use of tailings in the cement production and road construction for both industrial and environmental purposes are discussed in terms of waste minimization. The existing methods and approaches for efficient waste treatment and disposal are also discussed in this review paper.
In this study, the effect of the emergence angle of a source array on acoustic transmission in a typical shallow sea is simulated and analyzed. The formula we derived for the received signal based on the Normal Mode indicates that the signal is determined by the beamform on the modes of all sources and the samplings of all modes at the receiving depth. Two characteristics of the optimal emergence angle (OEA) are obtained and explained utilizing the aforementioned derived formula. The observed distributions of transmission loss (TL) for different sources and receivers are consistent with the obtained characteristics. The results of this study are valuable for the development and design of active sonar detection.
The aim of this paper is to discuss energy certification systems and multi-criteria certification schemes – both the assessment tools focusing on the level of the single building and on the urban level. The role of certification systems and the emerging technologies as a means of reducing energy consumption and achieving the high energy quality of the built environment is investigated.
The offshore Oil & Gas Industry is very important to the European Union economy. Therefore it must be properly monitored and protected, and legal regulations must be in place. Directive 2013/30/EU implemented on July 18, 2018 obliged EU Member States as well as operators and owners of oil and gas related activities in sea areas to implement solutions reducing the risk of major accidents, minor accidents and dangerous situations.
The purpose of the article is to identify all the possible hazards that may occur during oil and gas operations in marine areas and attempt to assess the risk along with providing effective responses in the event of its occurrence by preparing appropriate plans for responding to the situation. For the completion of the main purpose of the work the provisions of Directive 2013/30/EU of the European Parliament and of the Council of 12 June 2013 on safety of offshore oil and gas operations were presented and analyzed using the Hazard Identification method, the analysis of available reports prepared by the European Commission, classification bodies and own experience obtained while working in the offshore industry during searching, drilling and oil and gas production located under the seabed at the Polish Economic Executive Zone. The study presents numerous analyses and comments, which were presented in the form of graphs and tables, based on international reports and own experience gained while working in an offshore company.