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Use of Chaos in a Lyapunov Dynamic Game
J. Skowronski,W.J.Grantham,B.Lee 대한기계학회 2003 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.17 No.11
Feedback strategies of a qualitative competitive game between two players can be designed such as to influence parameters of a mechanical system to induce chaotic behavior. The purpose is to reduce the options and effects of the opponent's strategy. We show it on a case with dynamics specified by a nonautonomous Duffing equation with the players represented by damping and external forcing, respectively. It seems however that the conclusions can be made valid generally.
Fiber-to-Fiber Bonding of Clay Loaded Newsprint
( Jong-myoung Won ),( Jerzy Skowronski ) 한국공업화학회 1992 한국공업화학회 연구논문 초록집 Vol.1992 No.0
The ability of fibers to fora fiber-to-fiber bonds in laboratory handsheets Bade of SGW, CIMP, and unbeaten and beaten bleached kraft pulp separately, or of the mixture(15% BKP, 30% CTMP and 55% SGW) without and with the addition of coating clay and amphoteric starch has been studied. The performance of fiber-to-fiber bonds was evaluated based on the measurement of bonding strength(determined by the delamination technique) and the relationship between bond strength and light scattering coefficient. It was found that the ability of fibers to form fiber-to-fiber bonds varies from pulp to pulp and may not be predictable for their mixture, especially a mixture of mechanical and chemical pulps. Filler affects bond strength in two ways : (a) by reducing fiber-to-fiber bonded area and (b) by reducing the bonding effectiveness of regaining bonded area. The effectiveness of amphoteric starch addition in improving fiber-to-fiber bond strength depends on the level of its addition.
Oklinski, Michal K.,Skowronski, Mariusz T.,Skowronska, Agnieszka,Rü,tzler, Michael,Nørgaard, Kirsten,Nieland, John D.,Kwon, Tae-Hwan,Nielsen, Søren MDPI 2016 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.17 No.12
<P>Aquaporins (AQPs) are water channel proteins robustly expressed in the central nervous system (CNS). A number of previous studies described the cellular expression sites and investigated their major roles and function in the brain and spinal cord. Among thirteen different mammalian AQPs, AQP1 and AQP4 have been mainly studied in the CNS and evidence has been presented that they play important roles in the pathogenesis of CNS injury, edema and multiple diseases such as multiple sclerosis, neuromyelitis optica spectrum disorders, amyotrophic lateral sclerosis, glioblastoma multiforme, Alzheimer’s disease and Parkinson’s disease. The objective of this review is to highlight the current knowledge about AQPs in the spinal cord and their proposed roles in pathophysiology and pathogenesis related to spinal cord lesions and injury.</P>
Immunolocalization of Water Channel Proteins AQP1 and AQP4 in Rat Spinal Cord
Oklinski, Michal K.,Lim, Jung-Suk,Choi, Hyo-Jung,Oklinska, Paulina,Skowronski, Mariusz T.,Kwon, Tae-Hwan SAGE Publications 2014 The Journal of histochemistry and cytochemistry Vol.62 No.8
<P>Aquaporin (AQP) is a water-selective channel protein. In the brain, AQPs play critical roles in the production of cerebrospinal fluid and in edema formation. In contrast, the expression and role of AQPs in spinal cord are unclear. We aimed to investigate the localization of AQP1 and AQP4 in normal rat spinal cord compared with the expression of marker proteins for astrocytes, neurons, and endothelial cells. Immunohistochemistry demonstrated that AQP1 and AQP4 are expressed along all levels of the spinal cord from the cervical to lumbar levels. AQP1 immunolabeling was observed in the dorsal horns in the gray matter, whereas the labeling was weak and mainly seen close to glia limitans in the white matter. AQP1 was co-labeled with marker proteins for unmyelinated neuronal fibers (peripherin) and endothelial cells (RECA-1) of blood vessels that had penetrated through the glia limitans. In contrast, AQP1 did not colocalize with GFAP, an astrocyte marker, at any level of the spinal cord. AQP4 was exclusively localized at the astrocytes, but AQP4 expression in spinal cord exhibited a less polarized and more spatial distribution than that of brain astrocytes. The observed characteristic localization and expression patterns of AQP1 and AQP4 could provide insights toward gaining an understanding of the role of AQPs in the spinal cord.</P>
Aleksandra Wieloszynska,Krzysztof Pyrchla,Paweł Jakóbczyk,Dawid Lentka,Mirosław Sawczak,Łukasz Skowronski,Robert Bogdanowicz 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-
2D black phosphorus (BP) has attracted extensive attention as an anisotropic platform for novel optoelectronicand polarizing optics applications. Insight into the factors that tune the optical and polarizingproperties of 2D BP reveals their essential influence on BP-based photonic and optoelectronic devices. In this work, studies of the optical constants of few-layer black phosphorus coatings are studied and discussed,with particular emphasis on the complex dielectric function. Herein, the complex optical constantsof multi-flake composite films in the energy range of 1.38–6.2 eV by spectroscopic ellipsometrywith the use of the classical optical model have been determined. Classical optical simulations were suppliedby dielectric function estimations delivered by density functional theory. Additionally, few-layerblack phosphorus coatings were imaged by polarizing microscopy and investigated by Raman spectroscopy,revealing a size-tunable flake composition. The pattern analysis of the polarization imagesreveals a shift in polarization anisotropy originated mainly from the central region of the flake. Thesemi-isotropic optical properties suggest that the extinction coefficient of BP flakes defines the applicationsof BP in photonics, waveguides, and directional optoelectronic devices.