In Haigh Westergaard stress space linear combination of twin shear stress and Tresca yield functions is called the mean yield （MY） criterion. The mathematical relationship of the criterion and its plastic work rate ...In Haigh Westergaard stress space linear combination of twin shear stress and Tresca yield functions is called the mean yield （MY） criterion. The mathematical relationship of the criterion and its plastic work rate done per unit volume were derived. A generalized worked example of slab forging was analyzed by the criterion and its corresponding plastic work rate done per unit volume. Then, the precision of the solution was compared with those by Mises and Twin shear stress yield criterions, respectively. It turned out that the calculated results by MY criterion were in good agreement with those by Mises criterion.展开更多
<strong>Background:</strong> The Work-As-Imagined (WAI) is a plan that is expected to be performed before surgery, and the Work-As-Done (WAD) is the result of work actually done. In order to perform safe a...<strong>Background:</strong> The Work-As-Imagined (WAI) is a plan that is expected to be performed before surgery, and the Work-As-Done (WAD) is the result of work actually done. In order to perform safe and high-quality surgery for the individual surgeon, the surgical team, and hospital organization as a system, we have to reconcile the WAI and the WAD in resilience engineering for the real world of surgical healthcare. <strong>Objective:</strong> Based on the resilient healthcare theory, we would like to clarify the actual way of reconciling the WAI and WAD in surgery. <strong>Material and Methods:</strong> As a typical model of thoracic surgery, we use a lobectomy case for lung cancer. We describe a surgeon’s WAI and WAD, and we explain the anticipating, monitoring, responding, and learning based on the resilient healthcare theory. We reveal the gaps between the WAI and WAD during an operation, we consider the surgeon’s thinking and actual performance, and we describe the actual way of reconciling the WAI and WAD for the surgeon and surgical team. <strong>Outcomes:</strong> We described three scenes in the operating room, which are 1) by individual surgeon: adjustment for intrathoracic adhesion;2) by surgical team: adjustment for pulmonary artery bleeding;and 3) by surgical team with multi-professionals in the operating room: adjustment for life threatening pulmonary artery critical bleeding. <strong>Conclusion:</strong> In order to implement a resilient healthcare theory in everyday surgical work, it is important that 1) learning of incidents and the experience of doing well for unexpected events as lessons, and 2) constructing a circulation mechanism of anticipating, monitoring, responding, and learning.展开更多
基金This research was supported by the National Natural Sci—ence Foundation of China(Grant No.50474015)
文摘In Haigh Westergaard stress space linear combination of twin shear stress and Tresca yield functions is called the mean yield （MY） criterion. The mathematical relationship of the criterion and its plastic work rate done per unit volume were derived. A generalized worked example of slab forging was analyzed by the criterion and its corresponding plastic work rate done per unit volume. Then, the precision of the solution was compared with those by Mises and Twin shear stress yield criterions, respectively. It turned out that the calculated results by MY criterion were in good agreement with those by Mises criterion.
文摘<strong>Background:</strong> The Work-As-Imagined (WAI) is a plan that is expected to be performed before surgery, and the Work-As-Done (WAD) is the result of work actually done. In order to perform safe and high-quality surgery for the individual surgeon, the surgical team, and hospital organization as a system, we have to reconcile the WAI and the WAD in resilience engineering for the real world of surgical healthcare. <strong>Objective:</strong> Based on the resilient healthcare theory, we would like to clarify the actual way of reconciling the WAI and WAD in surgery. <strong>Material and Methods:</strong> As a typical model of thoracic surgery, we use a lobectomy case for lung cancer. We describe a surgeon’s WAI and WAD, and we explain the anticipating, monitoring, responding, and learning based on the resilient healthcare theory. We reveal the gaps between the WAI and WAD during an operation, we consider the surgeon’s thinking and actual performance, and we describe the actual way of reconciling the WAI and WAD for the surgeon and surgical team. <strong>Outcomes:</strong> We described three scenes in the operating room, which are 1) by individual surgeon: adjustment for intrathoracic adhesion;2) by surgical team: adjustment for pulmonary artery bleeding;and 3) by surgical team with multi-professionals in the operating room: adjustment for life threatening pulmonary artery critical bleeding. <strong>Conclusion:</strong> In order to implement a resilient healthcare theory in everyday surgical work, it is important that 1) learning of incidents and the experience of doing well for unexpected events as lessons, and 2) constructing a circulation mechanism of anticipating, monitoring, responding, and learning.
