Improvement Strategy of Distributed Delay Task Based on Timing Wheel Algorithms

In this article, the high angle of attack (AOA) maneuver control problem is studied under multiple disturbances and uncertainties. For the first time, the switched distributed delay is constructed to characterize the unsteady aerodynamics. Based on neural networks (NNs) and hyperbolic tangent function, the disturbance observer technique is extended to the nonstrict-feedback system control. To handle the switching problem, time-delay problem, and nonstrict-feedback problem caused by switched distributed delay terms, the Lyapunov–Krasovskii (LK) functional method and a variable separation method are cleverly combined. The proposed LK function can relax the constraints on time-varying delay. Finally, a disturbance observer–based neural finite-time prescribed performance flight control law is developed to improve the flight performance at high AOA, and its effectiveness has been verified through rigorous theoretical analysis and simulation experiments.

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Explicit Stability for a Porous Thermoelastic System with Second Sound and Distributed Delay Term

International Journal of Applied and Computational Mathematics ◽

10.1007/s40819-021-00997-5 ◽

2021 ◽

Vol 7 (2) ◽

Author(s):

Abdelhak Djebabla ◽

Abdelbaki Choucha ◽

Djamel Ouchenane ◽

Khaled Zennir

Keyword(s):

Distributed Delay ◽

Second Sound ◽

Delay Term

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Stationary distribution and periodic solution of a stochastic Nicholson's blowflies model with distributed delay

Mathematical Methods in the Applied Sciences ◽

10.1002/mma.7656 ◽

2021 ◽

Author(s):

Xiaojie Mu ◽

Daqing Jiang ◽

Tasawar Hayat ◽

Ahmed Alsaedi ◽

Bashir Ahmad

Keyword(s):

Periodic Solution ◽

Stationary Distribution ◽

Distributed Delay ◽

Nicholson’S Blowflies Model

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A qualitative study of organisational response to national quality standards for 7-day services in English hospitals

BMC Health Services Research ◽

10.1186/s12913-021-06213-w ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Elizabeth Sutton ◽

Julian Bion ◽

Russell Mannion ◽

Janet Willars ◽

Elizabeth Shaw ◽

...

Keyword(s):

Organisational Culture ◽

National Standards ◽

Local Context ◽

Structured Interviews ◽

Improvement Strategy ◽

Senior Staff ◽

National Quality ◽

History Of ◽

Day Services ◽

The Impact

Abstract Background National standards are commonly used as an improvement strategy in healthcare, but organisations may respond in diverse and sometimes negative ways to external quality demands. This paper describes how a sample of NHS hospital trusts in England responded to the introduction of national standards for 7-day services (7DS), from an organisational behaviour perspective. Methods We conducted 43 semi-structured interviews with executive/director level and clinical staff, in eight NHS trusts that varied in size, location, and levels of specialist staffing at weekends. We explored approaches to implementing standards locally, and the impact of organisational culture and local context on organisational response. Results Senior staff in the majority of trusts described a focus on hitting targets and achieving compliance with the standards. Compliance-based responses were associated with a hierarchical organisational culture and focus on external performance. In a minority of trusts senior staff described mobilising commitment-based strategies. In these trusts senior staff reframed the external standards in terms of organisational values, and used co-operative strategies for achieving change. Trusts that took a commitment-based approach tended to be described as having a developmental organisational culture and a history of higher performance across the board. Audit data on 7DS showed improvement against standards for most trusts, but commitment-focused trusts were less likely to demonstrate improvements on the 7DS audit. The ability of trusts to respond to external standards was limited when they were under pressure due to a history of overall poor performance or resource limitations. Conclusions National standards and audit for service-level improvement generate different types of response in different local settings. Approaches to driving improvement nationally need to be accompanied by resources and tailored support for improvement, taking into account local context and organisational culture.

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Implementation of the Comprehensive Unit-Based Safety Program to Improve Hand Hygiene in Four NICUs in Pune, India

Infection Control and Hospital Epidemiology ◽

10.1017/ice.2020.480 ◽

2020 ◽

Vol 41 (S1) ◽

pp. s8-s10

Author(s):

Julia Johnson ◽

Asad Latif ◽

Bharat Randive ◽

Abhay Kadam ◽

Uday Rajput ◽

...

Keyword(s):

Patient Safety ◽

Hand Hygiene ◽

Safety Culture ◽

Assessment Tool ◽

Tertiary Care ◽

Infection Prevention And Control ◽

Improvement Strategy ◽

Implementation Phase ◽

Healthcare Facilities ◽

Safety Program

Background: In low- and middle-income country (LMIC) healthcare facilities, gaps in infection prevention and control (IPC) practices increase risk of healthcare-associated infections (HAIs) and mortality among hospitalized neonates. Method: In this quasi-experimental study, we implemented the Comprehensive Unit-based Safety Program (CUSP) to improve adherence to evidence-based IPC practices in neonatal intensive care units (NICUs) in 4 tertiary-care facilities in Pune, India. CUSP is a validated strategy to empower staff to improve unit-level patient safety. Baseline safety culture was measured using the Hospital Survey on Patient Safety Culture (HSOPS). Baseline IPC assessments using the Infection Control Assessment Tool (ICAT) were completed to describe existing IPC practices to identify focus areas, the first of which was hand hygiene (HH). Sites received training in CUSP methodology and formed multidisciplinary CUSP teams, which met monthly and were supported by monthly coaching calls. Staff safety assessments (SSAs) guided selection of multimodal interventions. HH compliance was measured by direct observation using trained external observers. The primary outcome was HH compliance, evaluated monthly during the implementation and maintenance phases. Secondary outcomes included CUSP meeting frequency and HH compliance by healthcare worker (HCW) role. Result: In March 2018, 144 HCWs and administrators participated in CUSP training. Site meetings occurred monthly. During the implementation phase (June 2018–January 2019), HH monitoring commenced, sites formed their teams, completed the SSA, and selected interventions to improve HH based on the WHO’s IPC multimodal improvement strategy: (1) system change; (2) training and education; (3) monitoring and feedback; (4) reminders and communication; and (5) a culture of safety (Fig. 1). During the maintenance phase (February–September 2019), HH was monitored monthly and sites adapted interventions as needed. HH compliance improved from 58% to 70% at participant sites from implementation to maintenance phases (Fig. 2), with an odds ratio (OR) of 1.66 (95% CI, 1.50–1.84; P < .001). HH compliance improved across all HCW roles: (1) physician compliance improved from 55% to 67% (OR, 1.69; 95% CI, 1.42–2.01; P < .001); (2) nurse compliance from 61% to 73% (OR, 1.68; 95% CI, 1.46–1.93; P < .001); and (3) other HCW compliance from 52% to 62% (OR, 1.48; 95% CI, 1.10–1.99; P = .010). Conclusion: CUSP was successfully adapted by 4 diverse tertiary-care NICUs in Pune, India, and it resulted in increased HH compliance at all sites. This multimodal strategy is a promising framework for LMIC healthcare facilities to sustainably address IPC gaps and reduce HAI and mortality in neonates.Funding: NoneDisclosures: Aaron Milstone, Johns Hopkins University, BD (consulting)

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