Home – Home – Jornals – Advanced Search

Using Hammett indicators, X-ray fluorescence spectroscopy and atomic force microscopy, the authors analyze influence of high-voltage nanosecond impulses on structure and chemistry of surface and on process properties of calcium-bearing minerals. As a result of impulse energy inputs for t ≤ 30 s, the change in the structure and functions of mineral surface includes: enhancement of electron-donor capacity and formation of structural defects on the surface of fluorite, and enhancement of acceptor capacity of the surface of calcite and scheelite. Pre-treatment of mono-mineral samples by electrical impulses increases flotation ability of calcium-bearing minerals: increment in froth recovery makes 10–12% for scheelite, 5–6% for fluorite and 7–8% for calcite.

The article presents data of experimental studies into magnetic properties of iron-bearing sulfide and nonsulfide minerals under radiation and heating. It is found that bulk magnetic susceptibility has increased more than 100 times in pyrite and by 6 times in bauxite ore. Usefulness of radiation-and-heating magnetization in modification and processing of bauxite and tin-bearing minerals is demonstrated.

The article presents data on separation of minerals of eudialyte ore with low magnetic susceptibility using a high-intensity wet magnetic separator and pulp pulsation. The optimal separator variables of the magnetic field inductance, pulp pulsation and matrix filler diameter to ensure maximum efficiency of processing are determined.

The discussed challenge and its prospects in mining geoinformation science are connected with Big Data concept-flows of large sets of various data on mining. The authors describe Big Data technology and its general implementation on mini-clusters using Hadoop and MapReduce with case studies presented.

The presented system is intended for multistage hydraulic fracturing in long open holes of any orientation to create transversal fractures with a radius to 5 m in soft and medium-hard rocks. The downhole system has an inbuilt transport unit. This fracking equipment uses chemically active fluids generated in the fractured interval by mixture of two components injected in individual high-pressure hoses.

The method is based on transcapillary penetration of fluorescent fluid (EpoDye colorant) in the finest cavities and flaws on the surface of polished sections. Luminophor-filed voids become visible under UV light and optical microscope. The voids are estimated with respect to their kinds, sizes and area. The estimates and the statistical property of void distribution are described.

The paper shows that engaging philosophy in solving interdisciplinary problems not only sets new tasks but also opens new opportunities for the development of philosophical knowledge. The author provides justification for using the methods and techniques of philosophical analysis in the solution of interdisciplinary problems. Philosophy in this case can play an integrating role by uniting the approaches of various disciplines and forming a common conceptual basis that would allow the representatives of different sciences to find a common language.

The phenomenon of the rhetorical turn is considered as the third link in the line of the other two theoretical turning points of the development of scientific knowledge in XX century - the linguistic and interpretative turns. The paper discusses the nature of rhetorical turn in relation to the other two, and analyzes its specific features. Among them are a focus on non-disciplinary and meta-disciplinary, more unified arguments, contextuality of methodology, giving greater weight to the principles of Human Sciences and the rejection of the principles of objectivism which are inherent in Cartesian rationality. The paper makes a conclusion about the transition, linked with the rhetorical turn, to a new, communicative type of rationality.

Different theories of de re ascriptions are being discussed in the light of how they do notion specification, if they do. It is shown, that the approach which is not notionally specifying gives such theory of de re ascriptions that it has some implausible consequences, and notionally specifying approach shifts the very understanding of de re ascription.

In the course of the search for the Grand Unification Theory, there happens a change of epistemological standards of experimentation. Which of the two factors primarily influence this change - a social organization of researchers’ teams and relations within them or the nature of the subject of inquiry? We briefly consider how the cognitive status of an experiment, described in terms of such knowledge properties as the objectivity, reliability and validity, changes. We conclude that the transformation of epistemological standards is caused primarily by properties of the subject of inquiry and its epistemological nature.