Relationship between patient safety culture and safety performance in nursing

With providing high-quality health care services as the fundamental purpose, medical institutions should regard safeguarding patient safety as the core task. In recent years, the Chinese government has formulated relevant policies to promote patient safety. Medical institutions at all levels have formulated corresponding systems and measures in accordance with the policy requirements and the features of hospitals. However, due to the long-term impact of traditional harsh culture on the medical environment, many of the views and behaviors have not been fundamentally changed, leading to many problems in patient safety performance. As a group who first discover and handle patient safety problems, nurses can identify the causes of safety problems in a relatively accurate way. Therefore, it is necessary to conduct an in-depth study on the relationship between patient safety culture and safety performance in nursing.Tendo como propósito providenciar serviços de saúde de alta qualidade, as instituições médicas devem perspetivar a proteção da segurança do paciente como uma tarefa central. Nos últimos anos, o governo chinês elaborou políticas relevantes para promover a segurança do paciente e as instituições médicas de todos os tipos também têm desenvolvido várias atividades de segurança do paciente. Contudo, dado que o clima médico atual é afetado pela cultura tradicional de culpa-e-acusação, muitas das atitudes e comportamentos não foram mudados na essência, originando vários problemas de desempenho na segurança dos pacientes. Enquanto grupo ocupacional que primeiramente descobriu e lidou com os problemas da segurança dos pacientes, os enfermeiros conseguem identificar as causas dos problemas de segurança de uma forma relativamente precisa. Assim, é necessário realizar um estudo em profundidade sobre a relação entre a cultura de segurança do paciente e o desempenho de segurança na enfermagem

A Two-Degree-Of-Freedom Time-Optimal Solution for Hard Disk Drive Servo Problems

This paper deals with the hard disk drive (HDD) servo problems. A novel discrete time-optimal control solution is proposed in a two-degree-of-freedom (2DOF) structure, employing both the feedback and feedforward controllers. The time-optimal feedback controller, derived from a simple, double integral plant model, shows remarkable robustness and disturbance rejection in the presence of resonant modes, measurement noises and position and torque disturbances. It eliminates the needs for two separate controllers for track-seeking and track-following operations. The proposed feedforward controller in this 2DOF structure proves to be quite beneficial in reducing the seek time. It also allows the feedback controller to be tuned more aggressively, which helps to improve the quality of track following. The proposed control scheme offers a novel basic control structure for HDD servo, upon which numerous further improvements can be made. It is successfully tested in simulation on an industrial 13.0-kTPI HDD

On the local convergence of the semismooth Newton method for composite optimization

Existing superlinear convergence rate of the semismooth Newton method relies on the nonsingularity of the B-Jacobian. This is a strict condition since it implies that the stationary point to seek is isolated. In this paper, we consider a large class of nonlinear equations derived from first-order type methods for solving composite optimization problems. We first present some equivalent characterizations of the invertibility of the associated B-Jacobian, providing easy-to-check criteria for the traditional condition. Secondly, we prove that the strict complementarity and local error bound condition guarantee a local superlinear convergence rate. The analysis consists of two steps: showing local smoothness based on partial smoothness or closedness of the set of nondifferentiable points of the proximal map, and applying the local error bound condition to the locally smooth nonlinear equations. Concrete examples satisfying the required assumptions are presented. The main novelty of the proposed condition is that it also applies to nonisolated stationary points.Comment: 25 page