Дослідження залежності якості тіста від основних параметрів процесу замісу на тістомісильній машині періодичної дії

Проведено дослідження залежності якості тіста від основних показників процесу замісу: температури, тривалості замісу, частоти оборотів місильного органа. Отримані результати дозволяють визначити динаміку витрат енергії й оптимальних параметрів роботи тихохідної тістомісильної машини.Are carried out researches of dependence of quality of the paste from the basic indexes of process of a batter. The basic indexes of quality of the paste - time of achievement of the maximal height of consistogram and the size of a maximum. The dependences are received, allowing to define dynamics of energy consumptions and optimal parameters of work low speed of kneader machines

Организация процесса ремонтных работ в системе магистральных нефтепроводов

В результате исследования был произведен сравнительный анализ ремонтных конструкций в системе магистральных нефтепроводов. На основании полученных результатов было выявлено, что применение волокнисто композитных материалов для ремонта магистральных нефтепроводов имеет ряд преимуществ, одним из которых является увеличение срока эксплуатации трубопровода.As a result of the study, a comparative analysis of repair structures in the system of oil trunk pipelines was made. Based on the results obtained, it was found that the use of fiber composite materials for the repair of oil trunk pipelines has a number of advantages, one of which is to increase the life of the pipeline

Asymmetries of visuospatial attention in peri- and extrapersonal virtual space

This thesis examined the influence of spatial depth on the distribution of visuospatial attention in three-dimensional virtual space, as well as the functional interaction of the networks of alertness and visuospatial attention in the healthy brain. Although visuospatial attention in healthy people seems to be equally distributed across the left and right visual hemifield, the dominance of the right cerebral hemisphere in attentional functions leads to small, albeit statistically significant “overattention” towards the left visual hemispace. This phenomenon is called “pseudoneglect” (Bowers & Heilman, 1980; Nicholls et al., 1999). Contrary to that, right hemisphere lesions result in a pathological “neglect” of the left visual hemispace (Heilman, et al., 1979; Vallar et al., 2003), which is much more pronounced than pseudoneglect. Although neglect and pseudoneglect usually occur along the horizontal axis, both were also observed in vertical orienting. Both, the phenomenon of neglect and the phenomenon of pseudoneglect might differ depending on the spatial depth attended to: Near space, also called “peripersonal” space or far space, called “extrapersonal” space. Processing of both areas of space is supposed to rely on two different cortical visual processing streams (Ungerleider & Mishkin, 1982; Goodale & Milner, 1992) and normal as well as pathological asymmetries of visuo-spatial attention might differ depending on the distance of stimulus presentation (Committeri et al., 2007; Halligan & Marshall, 1991; McCourt and Garlinghouse, 2000; Shelton, Bowers & Heilman, 1990; Varnava et al., 2002). Clinical, experimental, and functional imaging studies suggest overlapping neuronal networks as well as functional interactions of alertness and visuospatial attention within the right hemisphere of the brain (Bartolomeo, 2000; De Renzi, et al., 1989; Fernandez-Duque & Posner, 1997; Gitelman et al., 2002; Karnath, et al., 1998; Robertson, et al., 1998; Vallar, 2001). In Study 1, healthy participants underwent 24 hours of total sleep deprivation and were tested at four points during the night (9 p.m., 1 a.m., 5 a.m., and 9 a.m.) for their ability to covertly orient and reorient attention in virtual peri-and extrapersonal space. At the 9 a.m. experimental session, a highly significant slowing of reorientation towards the left visual hemifield was observed in extrapersonal space. Thus, the maximally reduced level of arousal led to a neglect-like visuo-spatial reorienting behavior in the participants and this provides further evidence for the proposed anatomical and functional overlap of the two attentional systems. Study 2 investigated the influence of depth on pseudoneglect in healthy young participants by presenting a variation of the greyscales task and a landmark task in different depth locations (peripersonal, extrapersonal) and different orientations (horizontal, vertical) within three-dimensional virtual space. A horizontal leftward bias (pseudoneglect) for both tasks was found, which was stronger in peripersonal than in extrapersonal space. For the vertical condition, an upward bias was observed in the greyscales task, but not in the landmark task. These results support the hypotheses of right hemispheric dominance for visual spatial attention. Furthermore, the differences in attentional asymmetries with respect to depth suggest dissociable neural mechanisms for visual attentional processing in near and far space and the lack of significant correlations implies independence of horizontal and vertical stimulus processing