536 research outputs found
Mechanisms of proton-proton inelastic cross-section growth in multi-peripheral model within the framework of perturbation theory. Part 2
We demonstrate a new technique for calculating proton-proton inelastic
cross-section, which allows one by application of the Laplace' method replace
the integrand in the integral for the scattering amplitude in the vicinity of
the maximum point by expression of Gaussian type. This in turn, allows one to
overcome the computational difficulties for the calculation of the integrals
expressing the cross section to sufficiently large numbers of particles. We
have managed to overcome these problems in calculating the proton-proton
inelastic cross-section for production (n \le 8) number of secondary particles
in within the framework of \phi^3 model. As the result the obtained dependence
of inelastic cross-section and total scattering cross-section on the energy
\sqrt{s} are qualitative agrees with the experimental data. Such description of
total cross-section behavior differs considerably from existing now
description, where reggeons exchange with the intercept greater than unity is
considered.Comment: 11 pages, 10 figures (v3: some inaccuracies corrected
Economic tools for realization of methane production project on Kuzbass coal deposits
Environmental issues and, above all, issues related to the release of greenhouse gases into the atmosphere, such as coal bed methane, actualize the challenge of searching a variety of options for its disposal. The difference in the macroeconomic, industrial, geological and infrastructural features determine the need to choose the most cost-effective option for using of methane emitted from the coal deposits. Various economic ways to improve the profitability of production are viewed on the basis of the analysis of methane production project from Kuzbass coal deposits, Kemerovo region, Russia
Simulation of the short-range order in disordered cubic titanium monoxide TiO1.0
A model of the atomic structure with the short-range order in the vacancy distribution for the disordered cubic phase of titanium monoxide TiO1.0 has been proposed. The effect of the short-range order on the electronic structure and the stability of the compound has been studied by the supercell method within the DFT-GGA approximation with the use of pseudopotentials. It has been established that the appearance of the short-range order considerably decreases the total energy. The decrease in the energy is comparable with the energy gain during the ordering of the vacancies according to the type of monoclinic superstructure Ti5O5 to the long-range order parameter η = 0.7. It has been shown that the discrepancies between the theoretical and experimental electronic spectra of titanium monoxide can be explained by allowance for the short range order. © 2013 Pleiades Publishing, Ltd
Psychological and pedagogical support for families with disabled children in medical center
Introduction. This paper exemines the quality of psychological and pedagogical support provided in special institutions for the families with disabled children. The aim is to share experience of such work in one of these institutions, medical center Bonum, located in Ekaterinburg. Based on this experience, the essence of the work is demonstrated and development perspectives are identified. Methods. A survey was conducted among parents of the children going through rehabilitation in the medical center. In total 108 parents have participated. 10 parents with children having severe health disorders gone through an in-depth interview. There were also interviewed 7 staff members, both doctors and non-medical stuff (social workers, speech therapists), participating in rehabilitation process. Results. Was indicated that the psychological and pedagogical support was not a core activity of the medical center. The employees were not ready for this kind of work. The research revealed problems occurring when adult family members learn how to help the disabled children adapt in the modern society and acquire social competences necessary to effectively communicate in common situations, i.e. at school or other public places. Conclusion. Among the parents of disabled children treated at the medical center there is a demand not only for medical services, but also for psychological care both for the children and for their parents, as well as pedagogical support. The authors came to a conclusion, that special schools are needed, where psychologists and pedagogues on a regular basis would teach parents the methods of socializing their disabled children, starting at the early age and up until the children become socially mature. © 2019 LLC Ecological Help. All rights reserved
Financial Aspects of Technological Concept for Energy Efficiency Enhancement during Stripper Wells Development in Tomsk Region
The issue of operating costs cutting in terms of falling oil prices on the world market actualizes the challenge to find technological solutions to reduce electricity consumption during well operation. This is especially important for stripped-wells of small deposits in Tomsk region. The correlation analysis between the cost of oil production, electricity, heat and fuel consumption during the extraction of one ton of oil allowed the authors to focus on the financial aspect of such technological solutions like periodic well operation in the Shinginskoye field as well as to recommend the application of this method at the other fields in Tomsk region
‘Paying Attention’ in a Digital Economy: Reflections on the Role of Analysis and Judgement Within Contemporary Discourses of Mindfulness and Comparisons with Classical Buddhist Accounts of Sati
This chapter examines the question of the role of intellectual analysis and ethical judgement in ancient Indian Buddhist accounts of sati and contemporary discourses about ‘mindfulness’. Attention is paid to the role of paññ? (Sanskrit: prajñ?: ‘wisdom’ or ‘analytical insight’) and ethical reflection in the cultivation of sati in mainstream Abhidharma and early Mah?y?na philosophical discussions in India, noting the existence of a subordinate strand of Buddhist thought which focuses upon the non-conceptuality of final awakening (bodhi) and the quiescence of mind. Modern discourses of mindfulness are examined in relation to detraditionalization, the global spread of capitalism and widespread adoption of new information technologies. It is argued that analysis of the exponential growth in popularity of ‘mindfulness’ techniques must be linked to an exploration of the modern history of attention, more specifically, the possibility that the use of fast-paced, digital, multimedia technologies is facilitating a demand for fragmented or dispersed attention. It is argued that the fault line between divergent contemporary accounts of mindfulness can be seen most clearly over the issue of the role of ethical judgements and mental ratiocination within mindfulness practice. The two most extreme versions on this spectrum see mindfulness on the one hand as a secular mental technology for calming the mind and reducing stress and discomfort, and on the other as a deeply ethical and experiential realization of the geopolitics of human experience. These, it is suggested, constitute an emerging discursive split in accounts of mindfulness reflective of divergent responses to the social, economic, political and technological changes occurring in relation to the global spread of neoliberal forms of capitalism
A Study of Quantum Error Correction by Geometric Algebra and Liquid-State NMR Spectroscopy
Quantum error correcting codes enable the information contained in a quantum
state to be protected from decoherence due to external perturbations. Applied
to NMR, quantum coding does not alter normal relaxation, but rather converts
the state of a ``data'' spin into multiple quantum coherences involving
additional ancilla spins. These multiple quantum coherences relax at differing
rates, thus permitting the original state of the data to be approximately
reconstructed by mixing them together in an appropriate fashion. This paper
describes the operation of a simple, three-bit quantum code in the product
operator formalism, and uses geometric algebra methods to obtain the
error-corrected decay curve in the presence of arbitrary correlations in the
external random fields. These predictions are confirmed in both the totally
correlated and uncorrelated cases by liquid-state NMR experiments on
13C-labeled alanine, using gradient-diffusion methods to implement these
idealized decoherence models. Quantum error correction in weakly polarized
systems requires that the ancilla spins be prepared in a pseudo-pure state
relative to the data spin, which entails a loss of signal that exceeds any
potential gain through error correction. Nevertheless, this study shows that
quantum coding can be used to validate theoretical decoherence mechanisms, and
to provide detailed information on correlations in the underlying NMR
relaxation dynamics.Comment: 33 pages plus 6 figures, LaTeX article class with amsmath & graphicx
package
Raman spectra of epitaxial graphene on SiC and of epitaxial graphene transferred to SiO2
Raman spectra were measured for mono-, bi- and trilayer graphene grown on SiC
by solid state graphitization, whereby the number of layers was pre-assigned by
angle-resolved ultraviolet photoemission spectroscopy. It was found that the
only unambiguous fingerprint in Raman spectroscopy to identify the number of
layers for graphene on SiC(0001) is the linewidth of the 2D (or D*) peak. The
Raman spectra of epitaxial graphene show significant differences as compared to
micromechanically cleaved graphene obtained from highly oriented pyrolytic
graphite crystals. The G peak is found to be blue-shifted. The 2D peak does not
exhibit any obvious shoulder structures but it is much broader and almost
resembles a single-peak even for multilayers. Flakes of epitaxial graphene were
transferred from SiC onto SiO2 for further Raman studies. A comparison of the
Raman data obtained for graphene on SiC with data for epitaxial graphene
transferred to SiO2 reveals that the G peak blue-shift is clearly due to the
SiC substrate. The broadened 2D peak however stems from the graphene structure
itself and not from the substrate.Comment: 27 pages, 8 figure
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