Assessment of feasibility of projects for creating information and management systems of the electric power complex under conditions of uncertainty

Evaluating the feasibility of implementing proposed projects for creating information management systems (IMS) for industrial facilities is a complex procedure due to the uncertainty surrounding the accurate data about the prepared project during its implementation. Therefore, the application of decision support methods, based on soft computing and methodology, is deemed appropriate to address the difficulties arising from non-factors (uncertainty, non-determinism) in the evaluation of the implementation of proposed projects for IMS creation. Consequently, the use of non-deterministic interval methods has been proposed for the evaluation of the suitability of project proposals for creating information management systems under conditions of interval non-determinism, highlighting its advantages

Predictive age-groups modeling in a long-term perspective

© 2016 Taylor & Francis Group, London.In the current period, the demographic development of the Republic of Tatarstan is a very topical problem in calculating the rate of population growth, forecasting its size, and composition. Currently, the number of people planning specific age groups in the preparation of the federal and regional budgets is based on data analysis of state statistical reports on the number and mortality. However, the method of advancing age in our opinion is more accurate, allowing arguments to plan and predict future demographic situation. In this paper, this method is used to predict the number of pensioners in the Republic of Tatarstan

Thermally Responsive Amphiphilic Conetworks and Gels Based on Poly(N‑isopropylacrylamide) and Polyisobutylene

Novel amphiphilic conetworks (APCN) consisting of thermoresponsive poly(N-isoproplyacrylamide) (PNiPAAm) cross-linked by hydrophobic methacrylate-telechelic polyisobutylene (MA-PIB-MA) were successfully synthesized in a broad composition range. The resulting PNiPAAm-l-PIB conetworks (“l” stands for “linked by”) were obtained by radical copolymerization of NiPAAm with MA-PIB-MA in tetrahydrofuran, a cosolvent for all the components. Low amounts of extractables substantiated efficient network formation. The composition dependent two glass transition temperatures (Tg) by DSC analysis indicate microphase separation of the cross-linked components without mixed phases. It was found that the PNiPAAm-l-PIB conetworks are uniformly swellable in both water and n-hexane; i.e., these new materials behave either as hydrogels or as hydrophobic gels in aqueous or nonpolar media, respectively. The uniform swelling in both polar and nonpolar solutes indicates cocontinuous (bicontinuous) phase morphology. The equilibrium swelling degrees (R) depend on composition, that is, the higher the PIB content, the lower the R in water and the higher in n-hexane. The PNiPAAm phase keeps its thermoresponsive behavior in the conetworks as shown by significant decrease of the swelling degree in water between 20 and 35 °C. The lower critical solubility temperature (LCST) values determined by DSC are found to decrease from 34.1 °C (for the pure PNiPAAm homopolymer) to the range of 25–28 °C in the conetworks, and the extent of the LCST decrease is proportional with the PIB content. Deswelling-swelling, i.e., heating–cooling, cycle indicates insignificant hysteresis in these new thermoresponsive materials. This indicates that PNiPAAm-l-PIB conetworks with predetermined and thermoresponsive swelling behavior can be designed and utilized in several advanced applications on the basis of results obtained in the course of this study

Moyamoya disease

© 2016, Media Sphera. All rights reserved.Moya-moya is a rare cerebrovascular disease characterized by the progressive occlusion of cerebral vessels with partial switching off the circle of Willis and arteries that feed it. The article provides a review of literature, modern diagnostic criteria and a description of a single clinical case. The onset of the disease in this patient was characterized by headache and speech disorders. An analysis of speech disorders showed that they were systemic. They were registered at all language levels (phonetic, lexical, morphological, syntactic). A long diagnostic search may be explained by clinical manifestations that are atypical for other cerebrovascular diseases and by the rarity of the disease

Moyamoya disease

© 2016, Media Sphera. All rights reserved.Moya-moya is a rare cerebrovascular disease characterized by the progressive occlusion of cerebral vessels with partial switching off the circle of Willis and arteries that feed it. The article provides a review of literature, modern diagnostic criteria and a description of a single clinical case. The onset of the disease in this patient was characterized by headache and speech disorders. An analysis of speech disorders showed that they were systemic. They were registered at all language levels (phonetic, lexical, morphological, syntactic). A long diagnostic search may be explained by clinical manifestations that are atypical for other cerebrovascular diseases and by the rarity of the disease

Predictive age-groups modeling in a long-term perspective

© 2016 Taylor & Francis Group, London.In the current period, the demographic development of the Republic of Tatarstan is a very topical problem in calculating the rate of population growth, forecasting its size, and composition. Currently, the number of people planning specific age groups in the preparation of the federal and regional budgets is based on data analysis of state statistical reports on the number and mortality. However, the method of advancing age in our opinion is more accurate, allowing arguments to plan and predict future demographic situation. In this paper, this method is used to predict the number of pensioners in the Republic of Tatarstan

Moyamoya disease

© 2016, Media Sphera. All rights reserved.Moya-moya is a rare cerebrovascular disease characterized by the progressive occlusion of cerebral vessels with partial switching off the circle of Willis and arteries that feed it. The article provides a review of literature, modern diagnostic criteria and a description of a single clinical case. The onset of the disease in this patient was characterized by headache and speech disorders. An analysis of speech disorders showed that they were systemic. They were registered at all language levels (phonetic, lexical, morphological, syntactic). A long diagnostic search may be explained by clinical manifestations that are atypical for other cerebrovascular diseases and by the rarity of the disease

Predictive age-groups modeling in a long-term perspective

© 2016 Taylor & Francis Group, London.In the current period, the demographic development of the Republic of Tatarstan is a very topical problem in calculating the rate of population growth, forecasting its size, and composition. Currently, the number of people planning specific age groups in the preparation of the federal and regional budgets is based on data analysis of state statistical reports on the number and mortality. However, the method of advancing age in our opinion is more accurate, allowing arguments to plan and predict future demographic situation. In this paper, this method is used to predict the number of pensioners in the Republic of Tatarstan

New class of cocogem surfactants based on hexamethylenediamine, propylene oxide, and long chain carboxylic acids: Theory and application

Six cocogem surfactants were synthesized from N,N,Nʹ,Nʹ-tetra-(propane-2-olyl)-1,6-hexanediamine and higher monocarboxylic acids: capric, lauric, myristic, palmitic, stearic and oleic. N,N,Nʹ,Nʹ-tetra-(propane-2-olyl)-1,6-hexanediamine was synthesized from hexamethylenediamine and propylene oxide at room temperature, without utilizing any catalyst or solvent. Surface tension, conductivity, foaming ability, foam stability, emulsion stability, viscosity and density measurements were performed on aqueous solutions of all cocogem surfactants. Their surface activity and colloidal-chemical parameters such as critical micelle concentration (CMC), surface pressure at CMC (πCMC), surface tension at CMC (γCMC), surface excess (Γmax), concentration required for 20 mN/m reduction of surface tension (C20), Gibbs energies of adsorption and micellization (ΔGad and ΔGmic) were recorded and variation of these parameters based on hydrophobic chain length and structure was investigated experimentally and computationally. Synthesized surfactants with myristic, palmitic, and stearic tail continued to decrease surface tension even above CMC. The possible reason of this unusual behavior was determined based on computational studies. Surface activity parameters of cocogem surfactant with oleic tail disobeyed the general tendency established by other cocogems with saturated tail group. Palmitic and stearic acid based cocogem surfactants had good foam stability and the reason of this high foam stability was rationalized with high viscosity of their solutions. © 2020 The Korean Society of Industrial and Engineering Chemistr