Autonomous Systems

The ubiquity of digital media provides an unprecedented possibility to redefine the process and methods of design. Through experience from a series of creative projects, I investigate how certain aspects of the web allow for design to attain a degree of autonomy, thus producing results that go beyond anticipation and expertise of the author. Utilizing an unlimited capacity to store the content and retrieve immediate feedback, the designer’s role can be shifted to that of an initiator defining rules and boundaries, from which the process can evolve independently based on the input of users and data. The design output in such conditions is the development of schemes in which the author remains, but is marginalized as a producer – consciously restraining his level of control. Rather then struggling to add something singular to the bottomless pit of information, the designer is relegated in the role of medium: collecting and recombining the bits of fragmented data into the structures conveying meaning

Control of processer with time delays

The main goal of research -to simulate and investigate the processes of automatic management systems with significant automatic delays. In master’s final work, is investigation of managing systems with significant time delays. Investigation was done by simulation carried out in the environment of Matlab/Simulak.To model the processes, transmission functions in which time delay duration is much greater, than in comparison with the resultant steady of time were used. Work consists of investigation of operation in-one management systems. Standard PI, PID, regulators and time delay-compensating system, were used. Final work consists of quality evaluation of statistical indexes of transitional processes. Research presents management system response curves, transitional processes quality indexes and their statistical evaluation. Research findings are summarized in the evaluation

Nanoparticle-doped electrospun fiber random lasers with spatially extended light modes

Complex assemblies of light-emitting polymer nanofibers with molecular materials exhibiting optical gain can lead to important advance to amorphous photonics and to random laser science and devices. In disordered mats of nanofibers, multiple scattering and waveguiding might interplay to determine localization or spreading of optical modes as well as correlation effects. Here we study electrospun fibers embedding a lasing fluorene-carbazole-fluorene molecule and doped with titania nanoparticles, which exhibit random lasing with sub-nm spectral width and threshold of about 9 mJ cm^-2 for the absorbed excitation fluence. We focus on the spatial and spectral behavior of optical modes in the disordered and non-woven networks, finding evidence for the presence of modes with very large spatial extent, up to the 100 micrometer-scale. These findings suggest emission coupling into integrated nanofiber transmission channels as effective mechanism for enhancing spectral selectivity in random lasers and correlations of light modes in the complex and disordered material.Comment: 22 pages, 6 figure

Age does not count: resilience of quantity processing in healthy ageing

Quantity skills have been extensively studied in terms of their development and pathological decline. Recently, numerosity discrimination (i.e., how many items are in a set) has been shown to be resilient to healthy ageing despite relying on inhibitory skills, but whether processing continuous quantities such as time and space is equally well-maintained in ageing participants is not known. Life-long exposure to quantity-related problems may progressively refine proficiency in quantity tasks, or alternatively quantity skills may decline with age. In addition, is not known whether the tight relationship between quantity dimensions typically shown in their interactions is preserved in ageing. To address these questions, two experimental paradigms were used in 38 younger and 32 older healthy adults who showed typical age-related decline in attention, executive function and memory tasks. In both groups we first assessed time and space discrimination independently using a two-choice task (i.e., “Which of two horizontal lines is longer in duration or extension?”), and found that time and space processing were equally accurate in younger and older participants. In a second paradigm, we assessed the relation between different quantity dimensions which were presented as a dynamic pattern of dots independently changing in duration, spatial extension and numerosity. Younger and older participants again showed a similar profile of interaction between number, cumulative area and duration, although older adults showed a greater sensitivity to task-irrelevant information than younger adults in the cumulative area task but lower sensitivity in the duration task. Continuous quantity processing seems therefore resilient to ageing similar to numerosity and to other non-quantity skills like vocabulary or implicit memory; however, ageing might differentially affect different quantity dimensions

Хирургические аспекты язвенного гастродуоденального кровотечения

ГЕМОРРАГИИ /хирГЕМОСТАЗ ЭНДОСКОПИЧЕСКИЙПЕПТИЧЕСКАЯ ЯЗВА /хи