Brans-Dicke Wormhole Revisited

A basic constraint to be satisfied by Brans class I solution for being a traversible wormhole is derived. It is argued that the solution could be a wormhole analogue of the Horowitz-Ross naked black hole. It is further demonstrated that the wormhole is traversible only "in principle", but not in practice. Using a recently proposed measure of total gravitational energy inside a static wormhole configuration, it is shown that the wormhole contains repulsive gravity required for the defocussing of orbits at the throat.Comment: 13 pages, 6 figures, accepted for publication in Class. Quant. Gra

New Features of Extended Wormhole Solutions in the Scalar Field Gravity Theories

The present paper reports interesting new features that wormhole solutions in the scalar field gravity theory have. To demonstrate these, we obtain, by using a slightly modified form of the Matos-Nunez algorithm, an extended class of asymptotically flat wormhole solutions belonging to Einstein minimally coupled scalar field theory. Generally, solutions in these theories do not represent traversable wormholes due to the occurrence of curvature singularities. However, the Ellis I solution of the Einstein minimally coupled theory, when Wick rotated, yields Ellis class III solution, the latter representing a singularity-free traversable wormhole. We see that Ellis I and III are not essentially independent solutions. The Wick rotated seed solutions, extended by the algorithm, contain two new parameters a and \delta;. The effect of the parameter a on the geodesic motion of test particles reveals some remarkable features. By arguing for Sagnac effect in the extended Wick rotated solution, we find that the parameter a can indeed be interpreted as a rotation parameter of the wormhole. The analyses reported here have wider applicability in that they can very well be adopted in other theories, including in the string theory.Comment: 19 page

Obtaining alternative fuel from sweet sorghum in the conditions of the Republic of Tatarstan

© Published under licence by IOP Publishing Ltd. In the agro-industrial complex of the Russian Federation the main types of energy resources is the FCM (fuel-lubricating materials), electricity, coal and gas. Priority energy is determined depending on the orientation of the activity of the agricultural enterprise. In the cost of getting products one of the key factors is its energy intensity. Under the energy intensity means the amount of energy expended per unit of finished product. Domestic manufacturers lag behind on this indicator from their foreign colleagues. Greatly influenced by the climatic conditions of production, which affects the amount of energy expended annually becoming more expensive. In the article, the authors address a topical issue of renewable(alternative) fuels from sweet sorghum in the stems of which contains from 14 to 21 % sugar. In the Republic of Tatarstan tested and introduced varieties of sweet sorghum. On the basis of literary data and carried out their own research given a set of equipment and presents non-waste production chain of biodiesel and fuel pellets from stems of sweet sorghum

Innovative technologies of grain sorghum processing

© Published under licence by IOP Publishing Ltd. The article presents materials for the production of grain sorghum food products that allows you to completely eliminate from the diet foods containing gluten, vegetable oil from germ of grain sorghum, nanocellulose, tannin, amylopectinosis sorghum starch and glucose-fructose syrup

Recycling of wastes of agricultural production and rural settlements to produce biogas and organic matter

© Published under licence by IOP Publishing Ltd. In most regions of the Russian Federation today has a highly developed agriculture and processing enterprises, respectively with a high concentration of resources for production of biogas. On the Volga and southern districts account for a total of about 58% of the biogas potential. In the processing of all waste of agriculture and processing enterprises can fully supply gas to rural areas

Justification of the choice of units for mains-noah soil cultivation of sweet sorghum and their effectiveness

The article is devoted to problems of improving the efficiency of tillage crops. Presents an approach that focuses on the application of resource-saving technologies. To investigate the relationship between the financial welfare of the management and selection of units for primary processing of the soil. Conducted economic evaluation and identified the energy efficiency of main processing of the soil under sweet sorghum

The selection of energy-efficient main processing of the soil for sugar sorghum

© Published under licence by IOP Publishing Ltd. The implementation of any culture is the basic processing of soil are given great attention, as it largely affects the water-physical, biological and agricultural properties of the soil that ultimately determines yield

Innovative production technology ethanol from sweet sorghum

The paper considers the technological aspects of production of ethanol from nontraditional for Russian Federation crops - sweet sorghum. Presents the technological scheme of alcohol production and fuel pellets from sweet sorghum. Special attention is paid to assessing the efficiency of alcohol production from sweet sorghum. The described advantage of sugar content in stem juice of sweet sorghum compared with other raw materials. Allegedly, the use of the technology for producing alcohol from sweet sorghum allows to save resources

About one approach to the assessment of technical equipment of agricultural enterprises in conditions of economy modernization

© Published under licence by IOP Publishing Ltd. The problem of conformity of technical equipment and the number of employees in the agricultural enterprises arising in the process of modernization of the agricultural sector. As a means for evaluation of technical equipment are invited to use a special type of production functions, the distinctive feature of which is the simultaneous display of the micro - and macropaedia industry

Comparative evaluation of different machines for seedbed for sorghum

© Published under licence by IOP Publishing Ltd. The purpose of research - selection of the optimal composition of agricultural equipment for seedbed preparation for sweet sorghum. Identified and disclosed to the essential characteristics of technology. Thus, innovation in relation to agribusiness - is a new technology, new equipment, new plant varieties, new fertilizers and plant protection products. A special place is occupied by technical-technological and production innovatsii. In order to optimize the total cost in the cultivation of sorghum it is recommended to review the composition of sowing complexes, in order to optimize the timing of sowing, as well as reducing the complexity of the implementation