Safety crises and R&D outsourcing alliances: Which governance mode minimizes negative spillovers?

This study examines how R&D alliance governance affects both the probability and magnitude of negative spillovers triggered by a partner’s safety crisis. I show that hierarchical governance leads to a lower probability that a partner will suffer a crisis and thus trigger a negative spillover, yet this governance mode leads to negative spillovers of greater magnitude should they happen. Because expected spillover costs are calculated as the probability of occurrence times the magnitude of such costs, it is not clear which governance mode best minimizes expected spillover costs. I combine transaction costs economics and signaling theory to develop a contingency model that identifies which effect is more likely to dominate, as a way to address the reported dilemma. I found evidence in support of the described dilemma and the contingency model in a sample of 296 R&D outsourcing alliances in the biopharmaceutical industry.     

Leading for Change: School Leader Advocacy for Undocumented Immigrant Students

School leaders can ally with other educational stakeholders to encourage undocumented student persistence in Pk-12 schools. We explore (1) how school leaders create systems of support for undocumented and newly arrived immigrant students, and (2) how school leaders interpret and implement policies or school structures that affect student educational access. Border crossing theory guides our examination of how school leaders traverse and transgress borders that can impede students' education. This embedded case study included interviews with nine administrators working on the US-México border. The study finds that leaders expected to make a difference in students' lives by focusing on relationships and programming, committing to equity, and resisting deficit thinking about students and their families.     

Physiological Correlations With Short,Medium, and Long Cycling Time-Trial Performance

Purpose: Several studies have demonstrated that physiological variables predict cycling endurance performance. However, it is still unclear whether the predictors will change over different performance durations. The aim of this study was to assess the correlations between physiological variables and cycling time trials with different durations. Methods: Twenty trained male cyclists (maximal oxygen uptake [VO₂max] = 60.5 ± 5.6 mL/kg/min) performed 4 separate experimental trials during a 2-week period. Cyclists initially completed an incremental exercise test until volitional exhaustion followed by 3 maximal cycling time trials on separate days. Each time trial consisted of 3 different durations: 5 min, 20 min, and 60 min performed in a randomized order. Results: The main results showed that the physiological measures strongly correlated with long cycling performances rather than short and medium time trials. The time-trial mean power output was moderately high to highly correlated with peak power output and VO_2max (r = .61–.87, r = .72–.89, respectively), and was moderately to highly correlated with the lactate threshold Dmax method and second ventilatory threshold (r = .52–.75, r = .55–.82, respectively). Conclusions: Therefore, trained cyclists should develop maximal aerobic power irrespective of the duration of time trial, as well as enhancements in metabolic thresholds for long-duration time trials.     

Effect of wetted surface area on friction,pressure, wave and total drag of a kayak

Using theoretical principles, the components of drag (friction D _F, pressure D _PR and wave D _W) of a single-seat kayak were analysed. The purpose was to examine the effect of changes in wetted surface area due to changes in kayaker’s weight and the relative contribution of D _F, D _PR and D _W to the total passive drag as function of velocity. The total passive drag values were based on experimental data collected in a single-seat kayak. Three different kayaker simulated weights were tested – 65, 75 and 85 kg. D _F was the drag component that contributed the greatest percentage (between 60 and 68% at 5.56 m/s the top velocity tested) to the total passive drag for all the velocities tested and simulated weights. D _W was the most affected by the increase in kayaker’s simulated weight, mainly when comparing 65/75 to 85 kg. Results support the importance of a kayak design selection that minimises the kayak’s drag for the individual weight of the kayaker. Also, the results suggest that the path for better hydrodynamic kayak performance should seek changes that can reduce D _F, D _PR and D _W with D _F offering the most potential to reduce passive drag.     

Grade retention and school entry age in Spain: a structural problem

Educational Assessment, Evaluation and Accountability - Grade retention has been the focus of the education debate in Spain for decades. On average, more than 30% of students have repeated at least...