Military Academy

About: Military Academy is a based out in . It is known for research contribution in the topics: Population & Fuzzy logic. The organization has 2478 authors who have published 3003 publications receiving 33188 citations.

A patient with clinicopathologic features of small plaque parapsoriasis presenting later with plaque-stage mycosis fungoides: Report of a case and comparative retrospective study of 27 cases of “nonprogressive” small plaque parapsoriasis

Abstract: Background It is unsettled whether small plaque parapsoriasis (SPP) represents an inflammatory dermatosis or has a potential to transform into mycosis fungoides (MF) or is, in fact, MF. The literature contains no fully documented example of progression of SPP into MF. Objective The purpose of our study was to present a patient with clinical features of SPP who later developed plaque-stage MF, as seen both clinically and pathologically and to compare the clinicopathologic features of this unique case with 27 "nonprogressive" SPP cases. Methods This study is a prospective and retrospective evaluation of 28 patients, using light microscopy, immunohistochemistry, and molecular biology. Results A 56-year-old man with a 3-year history of persistent SPP with typical small ( Limitations Oligoclonal and monoclonal patterns were overrepresented in the SPP group, which may be due to the low amount and, probably, suboptimal quality of DNA used in the TCR-gamma rearrangement studies. Conclusions Occasionally patients with the clinical and pathologic presentation of SPP may develop typical features for MF. This event seems to be extremely rare; at present there appears to be no means to predict such a course. The vast majority of SPP patients will never have disease progression to MF.

Morphology of the surface layer of polymers modified by gaseous fluorine

Abstract: A change in the surface structure of low-density polyethylene films upon chemical modification by gaseous fluorine has been studied by scanning electron microcopy and X-ray spectral analysis. It has been demonstrated that this treatment leads to formation of the wavy surface; its characteristics depend on the method of polymer synthesis and the initial structure of the test sample. A possible mechanism for structural changes in the surface layer of the polymer during fluorination is considered. It is suggested that the molar volume and the configuration of polymer macromolecules change in the course of replacement of hydrogen atoms with fluorine atoms. Mathematical modeling has been performed for the formation of the fluorinated layer with due regard for chemical transformations of macromolecules and structural heterogeneity of the polymers. The isosurfaces of the polymer with various degrees of fluorination calculated within the framework of the above model indicate that the fluorinated layer being formed is characterized by unequal thickness due to different rates of fluorine diffusion in amorphous and crystalline regions. It has been shown that the degree of fluorination of the polymer is dependent on the duration of treatment. This relationship is in satisfactory agreement with the previous experimental data.

Switching Channel Development Dynamics in Planar Structures on the Basis of Vanadium Dioxide

Abstract: The results of the experimental studies and numerical simulation of the switching channel development dynamics in planar structures on the basis of vanadium dioxide are reported. The obtained data on the variation of the temperature in the channel with time and of the current arisen after the pulsed load, and on the times of transition from the high-resistance to the low-resistance state and back are analyzed in order to determine the switching mechanism and to predict the functional characteristics of the switchable vanadium- oxide structures as promising materials for the creation of relaxation generators that can serve as prototypes of neural oscillators. It is shown that the switching behavior is associated with the metal–semiconductor phase transition in vanadium dioxide, which is stimulated by the emission of Joule heat.