Change: A Leader’s Perspective

Change: A Leader\u27s Perspective represents the culmination of the Change Leadership course taught at Winona State University in the fall term of 2017. Leadership is a broad category with many facets. This book explores the subject and offers students of leadership and aspiring leaders current perspectives on leadership theories, the omnipresence of change, and personal reflections on the course material. Additional thoughts which resonate throughout this text are that leaders influence outcomes and that leadership manifests itself in change, whether by cause or effect.https://openriver.winona.edu/leadershipeducationbooks/1000/thumbnail.jp

Adapting relationships with place: Investigating the evolving place attachment and ‘sense of place’ of UK higher education students during a period of intense transition

In recent years interest has emerged regarding the geographies of higher education students, particularly in patterns of mobility and dispersion. While anecdotal rhetoric suggests a ‘typical student’ exists within UK institutions. What resonates is the notion that students are inherently heterogeneous, experiencing University in differing ways and times according to their circumstances and year of study. This paper uses ‘walking interviews’ conducted with University of Portsmouth students as a method to unpack how ‘non-local’ students might go about interpreting their sense of place within their term-time location. This methodology was designed specifically to ensure discussions of ‘sense of place’ remain directly in the context of the city and recognises the adaptive relationships students have with their term-time locations. This is important as there is a tendency within the literature to focus solely on the transition into University, ignoring that students often experience pressures throughout their degree pathway. These pressures can be linked to various social and spatial changes, such as insecurities regarding fitting in amongst unfamiliar peer groups or a lack of confidence concerning engagement with academic and non-academic practices, and draws attention to the non-linearity of students’ associations with their term-time location

Sensitivity Analysis of Optical Metrics for Spectral Splitting Photovoltaic Systems: A Case Study

Spectral splitting of sunlight to increase photovoltaic (PV) efficiency beyond the Shockley-Queisser limit has gained interest in recent years. Sensitivity analysis can be a useful tool for system designers to determine how much deviation from ideal conditions can be tolerated for different optical parameters. Understanding the origin of these sensitivities can offer insight into materials and device design. We employ 2-D TCAD simulations to analyze the sensitivity of system performance to two optical parameters: spectral fidelity (the fraction of photons directed to the intended material) and the spatial uniformity of illumination intensity. We analyze a system using crystalline silicon (Si) and cuprous oxide (Cu[subscript 2]O) as absorbers. We find that the spectral fidelity of the light directed to the Si cell has to be greater than 90% for the system to outperform a high-efficiency single-junction Si device. Varying the fidelity of the light directed to the Cu[subscript 2]O cell from 55% to 90% changes system efficiency by less than 10% relative. In some cases, increasing the fidelity of this light reduces system efficiency. We find no significant impact of spatial variation on length scales from 600 μm to 4.8 mm in devices with emitter sheet resistance less than 500 Ω/□.United States. Department of Defense. Assistant Secretary of Defense for Research & Engineering (Contract FA8721-05-C-0002)National Science Foundation (U.S.) (Contract ECCS-1102050)National Science Foundation (U.S.) (Singapore-MIT Alliance for Research and Technology (SMART))American Society for Engineering Education. National Defense Science and Engineering Graduate FellowshipNational Science Foundation (U.S.). Graduate Research Fellowship Progra

Extracting Mobility-Lifetime Product in Solar Cell Absorbers Using Quantum Efficiency Analysis

© 2015 Material Reserch Society. The long-wavelength quantum efficiency (QE) response of photovoltaic absorbers is determined by the length scales for minority carrier collection. However, extracting quantitative measurements of minority carrier mobility-lifetime product (jut) is complicated by uncertainty in other factors such as the depletion width, electric field, and the absorption coefficient. We apply previously developed methods to obtain estimates for ja in a tin(Il) sulfide (SnS) solar cell. We compare three analytic models for the minority carrier collection probability as a function of absorber depth to determine which model most accurately captures the behavior in our devices. For models in which multiple parameters are unconstrained, a random numerical search is used to optimize the fit to experimental QE for SnS. To identify sources of error, we perform a sensitivity analysis by fitting with SCAPS-1D. Our analysis shows that changes in absorption most strongly affect estimates for /.a, highlighting the need to obtain accurate, device-specific absorption data. Further modeling and experimental constraints are required to obtain self- consistent values for jit that correspond to actual device performance.United States. Department of Energy (Grant DE-EE0005329

Systemic and mucosal levels of lactoferrin in very low birth weight infants supplemented with bovine lactoferrin

Lactoferrin supplementation may help prevent infections in preterm infants, but the efficacy has varied with different doses and products. We assessed the absorption and excretion of bovine lactoferrin (bLF) in 31 infants receiving 100, 200, or 300 mg·kg–1·day–1 of enteral bLF for 30 days. bLF and human lactoferrin (hLF) in infant saliva, blood, urine, and stool, as well as expressed (EBM) or donor breast milk (DBM) that were collected (i) before the treatment was initiated, (ii) at study day 22, and (iii) one week after treatment cessation, were measured using ELISA. During treatment, bLF was absorbed from the gastrointestinal tract and detected in plasma, saliva, and urine, as well as excreted in stool. Levels of bLF in the saliva and stool began to decline within 12 h after dosing, and bLF was undetectable in all samples one week after treatment. The concentrations of hLF exceeded those of bLF across sample types and time-points. Infants receiving EBM demonstrated higher levels of hLF in the saliva and stool than those receiving DBM. Neither bLF nor hLF levels varied by patient characteristics, bLF dosage, or infection status. This is the first study demonstrating bLF absorption into the bloodstream and distribution to saliva and urine in preterm infants. Future studies should further explore LF pharmacokinetics because higher and more frequent dosing may improve the clinical benefit of LF supplementation.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author

Effect of growth temperature on carrier collection in SnS-based solar cells

Chemistry and Chemical Biolog