Toronto Metropolitan University Open Journals
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Self-management practices among diabetic patients during the COVID 19 pandemic: Systematic review
No full textIntroduction: Self-management is crucial in diabetes care and assessing its impact during the COVID-19 pandemic is vital. This systematic review examines the pandemic\u27s influence on self-management practices among diabetic patients. Methods: We conducted searches in PubMed, Cochrane Library, and Science Direct from December 2019 to June 2021. Included studies evaluated the effect of COVID-19 on self-management practices in diabetic patients. After removing duplicates, two independent reviewers conducted title and abstract reviews, followed by full-text screening, in accordance with PRISMA guidelines. Results: Of 1083 records, nine studies were included, comprising 5279 patients with sample sizes ranging from 52 to 1510. During the pandemic, most self-management practices remained relatively stable. Improvements were observed in dietary control (1% to 82.6%), self-blood glucose monitoring (11.3% to 47.1%), medication adherence (8.1% to 18.4%), weight management (19% to 40.9%), and physical activity (1% to 25.7%). Notably, physical activity showed a decrease (19% to 69.1%) during the pandemic. Conclusion: Compared to the pre-pandemic period, dietary control exhibited the most significant improvement, while physical activity demonstrated the least increase. Medication adherence and self-blood glucose monitoring were relatively better than other self-management practices. It is imperative to enhance self-management practices in diabetic patients during similar pandemics
Analysis of the Quantity of Harmful Particles Released to the Environment as a Results of the Wearing of Vehicle Tires
No full textIn this article, all the life cycle stages of car tires are presented in the context of environmental impact assessment. The consumption of materials used in the production of car tires is widely covered. The vehicle speed, tire type, road surface type, and driving conditions were considered influencing parameters for tire wear. The analysis of metal elements used in the production of tires has been widely performed. Tire wear particles are created by friction between the tread and the road surface. In this case, particles are formed mechanically. The formation of very fine particles is described as a thermo mechanical process in which hot spots in the tire tread reach high temperatures and cause the vaporization of volatile substances. The analysis of chemical elements of the particles formed as a result of tire wear is presente
Second Law Analysis of a Partially Filled Porous Channel, Considering Viscous Dissipation Effects
No full textThe first and second laws of thermodynamics were investigated analytically for a two dimensional partially filled porous channel. The porous layer is attached to the channel walls in first test case and the second one is a fully filled porous channel. The flow is laminar and steady with constant wall temperature. New analytical solution for temperature, velocity, Bejan and entropy generation number profiles were obtained considering viscous dissipation effects. The results of our new analytical solutions were validated against the numerical results of the lattice Boltzmann method (LBM) which show very good agreement. Using these analytical solutions, detailed analysis of the effects of Brinkman number, Darcy number and the porous layer thickness on Nusselt, entropy generation and Bejan numbers were carried out for mentioned test cases
Estimation of Thermo-physical Properties of Metallic Alloys
No full textIn the pursuit of advancing the development of lightweight automobiles, a significant global focus has been ondeveloping new lightweight materials that can be used with the high-pressure die casting (HPDC) process. HPDC offers adistinct advantage by enabling the production of near-net-shape components. An intrinsic characteristic of HPDC is its rapidsolidification capability. Therefore, understanding the effect of high cooling rates associated with HPDC on thethermophysical properties of the new alloys is essential because it plays a critical role in controlling and developing aptfilling and solidification models to enable the adaptation of these alloys into commercial production using HPDC. Anexperimental methodology utilizing an inverse heat transfer technique has been developed to study the variation ofthermophysical properties of metallic alloys under rapid solidification conditions associated with HPDC. The developedmethodology facilitates the estimation of temperature-dependent thermal diffusivity and thermal conductivity of the liquidand solid phases
Heat transfer Coefficients in a Metal Sorbent System for Heat Generation Stage initiated by a Pressure Jump
No full textAdsorption heat storage is a promising energy-saving technology that gives a possibility to make heat from alternative energy sources available to the consumer, as well as to use waste heat from industry and transport. To increase the efficiency of the adsorption heat accumulator, it is necessary to improve heat transfer in the sorbent-heat exchanger system. In this paper we consider a methodology for measuring the heat transfer coefficient of the metal-sorbent under real working conditions at the stage of the heat release initiated by a sharp change in pressure over the sorbent. The value of the heat transfer coefficient obtained for the flat layer of the granules placed on a metal plate was verified by measuring the power generated in a real heat exchanger under the same conditions
Advancements in Carbon Capture: Investigating Modified UiO-66 MOFs through Synthesis, Characterization, and Sorption Studies
No full textThe pressing demand for effective carbon capture and storage (CCS) methods in the battle against climate change has boosted considerable research into advanced porous materials. Metal-Organic Frameworks (MOFs) stand out as a promising avenue owing to their remarkable porosity, tunability, and high surface areas1. This study deals with the synthesis, characterization, and gas sorption properties of UiO-66, alongside its amine-functionalized counterpart UiO-66-NH2, and their pyrazine derivatives. Emphasizing their potential in CO2 capture, the study delves into the strategic integration of functional groups like amines and pyrazine derivatives to bolster CO2 adsorption via enhanced interaction energies and selectivities. Through a comprehensive set of characterization techniques, including SEM, TEM, PXRD, TGA, EDX-elemental mapping, and BET analysis, the morphology, crystallinity, thermal stability, and surface properties of these MOFs are elucidated. Gas sorption investigations show the enhanced CO2 uptake capacities of these tailored MOFs, attributed to their large surface areas and the presence of specific functional groups that interact preferentially with CO2 molecules. These findings highlight the promise of UiO-66 and its derivatives in carbon capture technologies, offering valuable insights into the design and optimization of MOFs for environmental applications
Energy-Efficient Artificial Loading Schemes when Testing an Asynchronous Motor
No full textThe article discusses the reasons for failure, repair and testing methods after repair of asynchronous electric motors that are in production. The issues of testing an asynchronous electric motor after repair have been studied. Testing is a special process after repairing an electric motor and many parameters of the nominal data of the electric motor depend on it. It was determined that the optimal option for artificial loading with a decrease in voltage frequency. A frequency divider is provided for testing, allowing for significant simplification of the system. since it will avoid the use of multifunctional industrial frequency converters
Influence of Method and Technological Modes for Producing Carbide Plates on their Wear Resistance
No full textThe article examines the influence of the technology for producing carbide inserts on their wear resistance. Carbide plates are produced in vacuum and hydrogen atmosphere. The resulting carbide cutting tools were tested when processing parts made from steels 110G13L, 35KHML, 40KHN2МА, 34KHN1М, St 3 and technological recommendations were developed for each case
Generation of Electricity with the Help of Wind and Solar on the Route of Tashkent Overground Metro Trains
No full textWind and solar energy occupy a fairly important place in the balance of global “green” generation. Wind and solar energy can be collected directly on city streets or intercity highways. The article proposes to install wind generators in the elevated metro between metro stations on both sides of the train and install solar panels above each metro station along the Thirty Anniversary of Independence of Uzbekistan line in Tashkent. The resulting electricity can be used in various ways, for example, for indoor and outdoor lighting of metro stations