Design data for brazed Rene 41 honeycomb sandwich

Strength data, creep data and residual strength data after cyclic thermal exposure were obtained at temperatures from 78 K to 1144 K (-320 F to 1600 F). The influences of face thickness, core depth, core gage, cell size and thermal/stress exposure conditions on the mechanical design properties were investigated. A braze alloy and process was developed that is adequate to fully develop the strength of the honeycomb core while simultaneously solution treating and aging the Rene 41 fact sheets. New test procedures and test specimen configurations were developed to avoid excessive thermal stresses during cyclic thermal exposure

Video Analysis in Educator Preparation and Its Impact on Teacher Performance Assessment

The researcher analyzed data from two online cohorts of preservice teachers at a small, liberal arts university in Washington State. The researcher conducted a correlational analysis to determine if standardized writing scores and the quantity of video analysis conducted during the educator preparation program (EPP) predicted performance on the national Educative Teacher Performance Assessment (edTPA). Contrary to the researcher’s hypothesis, academic writing ability did not have a predictive positive relationship with edTPA performance, r = -.004, p = .98. The total quantity of video analysis, both of self and of other, resulted in a statistically significant positive correlation with total edTPA scores, r = .34, p = .02. Disaggregated data showed significant positive correlations with the quantity of others’ videos interns commented on, particularly with edTPA Task 3: Assessment

Multi-objectives model predictive control of multivariable systems

In this thesis, MOO [Multi-Objective Optimization] design for Model Predictive Control (MPC) and Proportional Integral (PI) control are investigated for a multivariable process

Approaches to the investigation of intrasite spatial patterning in three dimensions

Until very recently virtually all spatial analyses in archaeology have been restricted to sites or levels that are amenable to the consideration of spatial patterning in the two horizontal dimensions. This was accomplished either through pre-screening of sites, or investigating vertical variation and defining limits to what would be considered appropriate for two dimensional research. The utility of the K-means technique and the necessary modifications to it for the study of three dimensional spatial structures is examined here through analysis of simulated archaeological levels. Results from these experiments were abstracted and applied to the analysis of two different sites from the Southwestern French Paleolithic: the Magdalenian site of Le Flageolet II and the Grotte XVI, a multicomponent site. Results of these analyses contribute to our understanding of the range of variation inherent in spatial patterning with archaeological sites, indicate that the techniques are useful, and suggest that similar sites not usually deemed amenable to the more limited two dimensional methods can no longer be ignored

Refugia Gardening: A Good Anthropocene Begins at Home

Our present age is often called the Anthropocene, an era dominated by human activities that erode biodiversity and ecological functions, altering natural systems and cycles. As a result, we are causing climate and mass extinction crises and undermining the ecosystem services that enable human flourishing. Thus, humans have moral and existential obligations to reverse this trend by realigning our relationships with nature. We are advocating for refugia gardening to build places of renewal in our own yards and in our communities. Refugia are pockets of life where species can survive and adapt during ecological crises. Refugia become “seeds” for repopulating the landscape with ecological communities that are adapted to new environmental conditions. We propose that refugia gardening can lay the foundations for a “good Anthropocene” defined by relational care7 between humans and the biosphere in a way that safeguards ecological functions and biodiversity. This will ensure that humans and other species can fittingly adapt to new realities with sufficient resiliency

The follow-up and results of laparoscopic antireflux surgery

Gastro-oesophageal reflux disease is a common disease in the Western world. In addition to lifestyle advice, treatment consists of the use of antacids. Some of the patients do not benefit from antacids, do not want to swallow lifelong antacids or suffer from a diaphragmatic hernia. For this group, antireflux surgery is indicated. Laparoscopic antireflux surgery (so by means of a keyhole surgery) consists of a fundoplication. This means that the fundus of the stomach is placed around the gastro-oesophageal junction, where it forms a cuff. The classic fundoplication describes a 360-degree coverage of the fundus, but a partial fundoplication provides equal reflux control with less side effects. In this thesis, the two "best" partial fundoplicaties (180º wide and 270 behind) were compared. Both of these prove to be equally effective in the short term. For correction of a diaphragmatic hernia a mesh prosthesis was introduced. However, this might lead to serious complications. In our cohort of patients, the use of a mesh does not result in less symptoms, recurrence or reoperations, when compared to correction without mesh. We therefore recommend not to use it routinely. Correction of a diaphragmatic hernia in elderly patients is safe. Patients suffering from chronic cough induced by gastro-oesophageal reflux may benefit from laparoscopic partial fundoplication. In the past this was not considered as an effective treament, but we were able to select a cohort of patients that benefited from laparoscopic antireflux surgery. Patient Reported Outcome Measures should be used for follow-up of laparoscopic antireflux surgery, preferably due to online follow-up, using health-related quality of life questionnaires and symptom scores. After all, it is the patient that should determine whether the operation was successful

An Exploration of Leadership in the Implementation of Collaborative Co-Teaching

This qualitative study explored the role of leadership in implementing co-teaching for English language development in K-12 settings, specifically, the role of leadership of administrators and teacher-leaders. Research has confirmed that school leaders substantially impact student outcomes and teacher effectiveness (Cheung et al., 2018; Leithwood et al., 2004; Liebowitz & Porter, 2019; Theoharis & O’Toole, 2011). Research also confirms that improving students’ learning is too large an issue for a single leader to do alone (Taylor et al., 2004). There is a growing body of research on teacher leadership and the integral role they play in implementing school reform and improvement of teacher practice (Cheung et al., 2018; Harris & Muijs, 2002; Hopkins et al., 2019; Taylor et al., 2004). The research in this dissertation explores the role that administrators and teacher-leaders play in the implementation of co-teaching as a model for English language instruction. Using grounded theory, I include the perspective and experiences of 22 K-12 educators from three school districts in Oregon. Findings from this dissertation offer insight into the rationale leaders use to implement co-teaching, the transformative and social justice leadership traits they embody to aid in the implementation of co-teaching, and the impact on co-teaching in the time of the COVID-19 pandemic. Throughout the manuscript, I discuss overarching themes that emerged and provide implications and future research and direction for administrators and teachers who may be considering implementing co-teaching in their respective schools and districts