УЧЕТ ЭЛЕКТРОДИНАМИЧЕСКОГО ДЕЙСТВИЯ ТОКОВ КОРОТКОГО ЗАМЫКАНИЯ ПРИ ПРОЕКТИРОВАНИИ ГИБКИХ ТОКОПРОВОДОВ 6−10 кВ СИСТЕМ ЭЛЕКТРОСНАБЖЕНИЯ

The paper shows a vital importance of electrodynamic affect account in respect of relatively small short-circuit-currents on flexible current-conducting wires of electric supply systems at long short-circuit duration. Insufficient electrodynamic stability of flexible current-conducting wires of type design has been revealed. While using simplified and numerical methods for calculation of wire dynamics optimum parameters of flexible current-conducting wires have been determined.Показана актуальность учета электродинамического действия сравнительно небольших токов короткого замыкания на гибкие токопроводы систем электроснабжения при больших продолжительностях КЗ. Выявлена недостаточная электродинамическая стойкость типовых конструкций гибких токопроводов. С использованием упрощенных и численных методов расчета динамики проводов определены оптимальные параметры гибких токопроводов

ACCOUNT OF ELECTRODYNAMIC AFFECT OF SHORT-CIRCUIT CURRENTS WHILE DESIGNING FLEXIBLE CURRENT-CONDUCTING WIRES 6 – 10 KV OF ELECTRIC SUPPLY SYSTEMS

The paper shows a vital importance of electrodynamic affect account in respect of relatively small short-circuit-currents on flexible current-conducting wires of electric supply systems at long short-circuit duration. Insufficient electrodynamic stability of flexible current-conducting wires of type design has been revealed. While using simplified and numerical methods for calculation of wire dynamics optimum parameters of flexible current-conducting wires have been determined

CORE TEMPERATURE THRESHOLDS FOR EXERCISE VENTILATION WITH AN INGESTIBLE TEMPERATURE PILL SENSOR

PURPOSE: The purpose of this study was to assess if core temperature thresholds for exercise ventilation differ between sites of core temperature measurement during an incremental exercise test from rest to the point of exhaustion. It was hypothesized that the core temperature threshold for the ventilatory equivalent for oxygen (VE/VO2),measured with ingestible pill temperature, would not be different from the oesophageal temperature and tympanic membrane temperature thresholds for VE/VO2. METHODS: Four females volunteered for this study that was approved by the SFU Office of Research Ethics. Two of the female volunteers were amenorrheic and the other two were in follicular phase of their menstrual cycles. The results were then compared to four males VE/VO2 oesophageal (TOES) and tympanic membrane (TTY) temperature thresholds from a published study. Each volunteer after a 24 h reflection period, signed a medical history form, a PAR-Q, as well as gave their signed informed consent. Core temperature thresholds for exercise ventilation were assessed with an ingestible pill temperature (TPILL) sensor, with a TOES probe and with TTY probe. Minute ventilation (VE) and volume of consumed oxygen (VO2) were quantified by indirect calorimetry. Vieth threshold software was employed to determine the core temperature thresholds for VE/VO2. An unpaired, two-tailed t-test was used to compare the core temperature thresholds for exercise ventilation. The P value was set at 0.05. RESULTS: The TPILL threshold for VE/VO2 of 37.1±0.4°C(mean±SD) showed a trend (p=0.06) to be lower than the TES threshold for VE/VO2 of 37.5±0.2°C. No difference was evident between TPILL threshold and TTY threshold of 37.03±0.2°C for VE/VO2. In conclusion, these preliminary results show a trend towards a lower core temperature threshold for exercise ventilationwhen measured in the gastrointestinal tract as compared to an esophageal temperature threshold for exercise ventilation. Supported by lululemon athletica ™, Mitacs Accelerate, NSERC Engage and CF

Numerical study of lean-direct injection combustor with discrete-jet swirlers using Reynolds stress model

The flowfield in a lean-direct injection (LDI) combustor with discrete-jet swirlers is described and analyzed using a computational fluid dynamics (CFD) code with a Reynolds stress turbulence model (RSTM). The results from the RSTM are compared to timeaveraged laser-Doppler velocimetry (LDV) data, as well as results from the National Combustion Code (NCC) that has a cubic nonlinear κ-ε turbulence model, and from the KIVA code using the standard κ-ε model. The comparisons of results indicate that the RSTM accurately describes the flow details and resolves recirculation zones and high velocity gradients while the κ-ε models are unable to capture most flow structures. This confirms that, within the Reynolds averaging approach, the higher-order RSTM is preferred for simulating complex flowfields where separations, strong anisotropy, and high swirl are present

Frailty Syndrome: Nursing Interventions

Background Frailty syndrome is now becoming a challenge for multidisciplinary teams. Frailty assessment in elderly patients is recommended due to the associated cascade of irreversible alterations that ultimately result in disability. Aims The purpose of this article is to identify interventions, which can be implemented and performed by nurses as part of a multidisciplinary plan. Nursing strategies related to nutrition, polypharmacy, adherence to treatment, falls, exercise, and mood and cognitive intervention are described. Design Discussion paper. Data sources Relevant and up-to-date literature from PubMed, MEDLINE, and Scopus databases regarding the selected issues, such as nutritional status, polypharmacy, falls, physical activity, and cognitive functions. Conclusion Frailty is considered preventable or even reversible with the appropriate interventions, which can help maintain or even restore physical abilities, cognitive function, or nutritional status in frail elderly patients. Hence, the nursing interventions are significant in clinical practice and should be implemented for frail patients. Implications for nursing Health-care providers, especially nurses, in their clinical practice should recognize not only elderly patients but also elderly patients with concurrent frailty, requiring intensified therapeutic interventions tailored to their individual needs. Frailty syndrome is undoubtedly a challenge for multidisciplinary teams providing health care for geriatric patients

Use of a Smartphone to Gather Parkinson’s Disease Neurological Vital Signs during the COVID-19 Pandemic

Introduction. To overcome travel restrictions during the COVID-19 pandemic, consumer-based technology was rapidly deployed to the smartphones of individuals with Parkinson’s disease (PD) participating in a 12-month exercise trial. The aim of the project was to determine the feasibility of utilizing a combined synchronous and asynchronous self-administered smartphone application to characterize PD symptoms. Methods. A synchronous video virtual visit was completed for the administration of virtual Movement Disorder Society-Unified Parkinson’s Disease Rating Scale III (vMDS-UPDRS III). Participants asynchronously completed a mobile application consisting of a measure of upper extremity bradykinesia (Finger Tapping Test) and information processing. Results. Twenty-three individuals completed the assessments. The mean vMDS-UPDRS III was 23.65 ± 8.56 points. On average, the number of taps was significantly greater for the less affected limb, 97.96 ± 17.77 taps, compared to the more affected, 89.33 ± 18.66 taps (p = 0.025) with a significantly greater number of freezing episodes for the more affected limb (p<0.05). Correlation analyses indicated the number of errors and the number of freezing episodes were significantly related to clinical ratings of vMDS-UPDRS III bradykinesia (Rho = 0.44, p<0.01; R = 0.43, p<0.01, resp.) and finger tapping performance (Rho = 0.31, p=0.03; Rho = 0.32, p=0.03, resp.). Discussion. The objective characterization of bradykinesia, akinesia, and nonmotor function and their relationship with clinical disease metrics indicate smartphone technology provides a remote method of characterizing important aspects of PD performance. While theoretical and position papers have been published on the potential of telemedicine to aid in the management of PD, this report translates the theory into a viable reality