Effect of carburizing and hardening temperature on the endurance of forming dies from steel R6M5

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 19 - 23, March, 2013

КРАУДФАНДИНГОВІ ТЕХНОЛОГІЇ У РОЗВИТКУ НАЦІОНАЛЬНОЇ ТУРИСТИЧНОЇ СИСТЕМИ

The article substantiates the sense of crowdfunding and determines a list of participants of crowdfunding projects. The author has proposed a scheme for implementation of a crowdfunding tourism project, indicating the main stakeholders. The author has substantiated directions of implementation of projects, using crowdfunding in the national tourism system. The author has suggested a “house” of crowdfunding for projects of the national tourism system. The article determines advantages and disadvantages of crowdfunding for the main stakeholders and the society.    В статье обоснована сущность краудфандинга и краудфандинговых технологий, определен круг их участников. Предложено процесс реализации краудфандинга туристического проекта с указанием основных стейкхолдеров. Обоснованы направления реализации проектов с помощью краудфандинга в туристической системе. Предложено «архитектонику» краудфандинга проектов национальной туристической системы. Определены преимущества и недостатки краудфандинга для основных стейкхолдеров и общества.У статті обґрунтовано сутність краудфандингу та краудфандингових технологій, визначено коло їх учасників. Запропоновано процес реалізації краудфандингу туристичного проекту із зазначенням основних стейкхолдерів. Обгрунтовані напрямами реалізації проектів за допомогою краудфандингу в туристичній системі. Запропоновано «архітектоніку» краудфандингу проектів національної туристичної системи. Визначено переваги та недоліки краудфандингу для основних стейкхолдерів та суспільства

Spin susceptibility in superconductors without inversion symmetry

In materials without spatial inversion symmetry the spin degeneracy of the conduction electrons can be lifted by an antisymmetric spin-orbit coupling. We discuss the influence of this spin-orbit coupling on the spin susceptibility of such superconductors, with a particular emphasis on the recently discovered heavy Fermion superconductor CePt3Si. We find that, for this compound (with tetragonal crystal symmetry,) irrespective of the pairing symmetry, the stable superconducting phases would give a very weak change of the spin susceptibility for fields along the c-axis and an intermediate reduction for fields in the basal plane. We also comment on the consequences for the paramagnetic limiting in this material.Comment: 10 pages, 3 figure

Optimal design of turbines taking into consideration the mode of operation

The technique of turbines parameters optimization taking into consideration a variable mode of their operation has been developed. Block-hierarchical representation of design process is used. The hierarchy of local optimization problems is organized by a functional sign and realized in a common information space. The structure of optimization technique is shown, and also the analysis of the data streams uniting these problems in unified process of optimal design is resulted. By means of the developed technique optimal design of the 4-stage turbine expander with rated power 4 MW has been performed. Results of the design are presented and analyzed

Multiple sclerosis-related fatigue and possibilities of its correction

Multiple sclerosis (MS)-related fatigue is encountered in 75–92% of patients and it is one of the key symptoms that affect quality of life. Physicians and patients' relatives frequently underestimate MS-related fatigue; the latter may occur at any disease stage, its degree is inadequate to physical exercise and reduces after a short-term daytime rest. Fatigue due to MS is not directly related to the degree of paresis; however, it is more common in patients with pyramidal insufficiency. Overfatigue may be the first symptom of an MS exacerbation. The genesis of fatigue in MS is not known with certainty. The development of this symptom is associated with impairments in neuroimmune responses and biochemical processes and with the administration of some drugs. Special tests and scales are used to objectify the degree of fatigue. The most commonly used questionnaires are the Fatigue Severity Scores to rate physical and mental fatigue, as well as the Modified Fatigue Impact Scale in patients having MS. When a patient with MS complains about fatigue, it is necessary to rule out its other possible causes and to specify its relation to MS and the necessity of fatigue correction. Аmantadine is one of the drugs used for the symptomatic therapy of MS. This paper presents the data of randomized clinical trials evaluating the efficacy and safety of this drug for the symptomatic treatment of MS. Correction of MS-related fatigue requires a multidisciplinary approach that involves a combination of drug therapy, therapeutic exercises, active lifestyle, and relatives' understanding

Sol-gel synthesis of Fe-containing silica glasses

Fe-doped glasses and composites were prepared by hybrid sol-gel process, modified in the part of doping technique. The UV-VIS spectra and XRD-investigation show both the presence of oxide and fluoridecomplexes in the glass matrices

On the appearance of space temperature electric structures in hyperconductors under high magnetic fields

As part of the study of low temperature galvanomagnetic properties of high purity A1 in the Corbino geometry the voltage-current characteristics (IV) under external transverse magnetic field in the regime of given current revealed the effects of voltage stabilization. Here we attempt to ascribe these phenomena to appearance in the sample of bulk temperature structures characteristic of highly nonequilibrium systems. Joule’s heat of flowing electric current gives rise to disk warming. We also discuss the problems of the influence of warming in disks on the phenomena of electric transport with allowance for own magnetic fields being generated in disk