The Relationship of High School Size, Gender and First-Year Retention Rates at South Dakota State University

This study examines selected demographic characteristics of six South Dakota State University 2008 – 2013 cohorts of first-time, full-time freshmen who graduated from South Dakota public high schools. The purpose of our study is to explore the relationship between high school size, gender and student retention at South Dakota State University. Information that was both gathered and analyzed about these students includes their high school size and gender. Our examination of this data uses descriptive statistics to identify characteristics of students who were retained after their first year at SDSU. This study identifies two findings of interest: first, students graduating from high schools with populations of 200-399 students were retained at the highest level; second, gender matters for retention as females were more likely to return than males

Aristotle's Peculiarly Human Psychology

For Aristotle, human cognition has a lot in common both with non-human animal cognition and with divine cognition. With non-human animals, humans share a non-rational part of the soul and non-rational cognitive faculties (DA 427b6–14, NE 1102b29 and EE 1219b24–6). With gods, humans share a rational part of the soul and rational cognitive faculties (NE 1177b17– 1178a8). The rational part and the non-rational part of the soul, however, coexist and cooperate only in human souls (NE 1102b26–9, EE 1219b28–31). In this chapter, I show that a study of this cooperation helps to uncover some distinctive aspects of human cognition and desire

Hypothermic Preservation of Porcine Hearts by Cardioplegic Perfusion Studied with 31P NMR

NRC publication: Ye

Linking carbon and water cycles in forests: from the cell to the ecosystem level

Dendrochronology combined with stable carbon (C) isotopes has given us the opportunity to travel back in time, from decades to centuries and even millennia and reconstruct tree growth and water-use efficiency in response to major changes that forests have been facing. A crucial aspect, which has been poorly investigated so far, is to understand how well the forest canopy phenology and physiology, namely C uptake and water lost through transpiration, are \u201csynchronized\u201d with the secondary C investment in tree stem during tree ring formation. In this respect, xylogenesis allows us to take a closer look at the annual ring, zoom into a single cell and explore the dynamics of tree growth and C allocation at fine time scale. We will present results from a unique study linking the canopy phenology and C uptake to the development of xylem cells during tree-ring formation. The study was conducted on a mixed forest in New Hampshire (U.S.A.), dominated by Quercus rubra L.; Acer rubrum L. and Pinus strobus L. The site is equipped with an eddy-covariance tower and a phenocam to continuously monitor meteorological parameters together with C and water fluxes (i.e.; Gross Primary Productivity and evapotranspiration) and canopy phenology. Microcores were sampled weekly from March until November 2015 from 5 trees per species. Differences among species in term of dynamic of tree growth will be discussed in relation to the plant functional type and wood anatomical (i.e.; diffuse vs. ring porous wood) and hydraulic (i.e.; isohydric vs. anisohydric) features. Furthermore, we will explore how the different phenological stages of cambial activity are affected by climate and coupled with changes in canopy phenology and physiology

A 31P magnetic resonance study of antegrade and retrograde cerebral perfusion during aortic arch surgery in pigs

NRC publication: Ye

31P spectroscopic imaging of pig brains during circulatory arrest

NRC publication: Ye

Magic-angle spinning 31

AbstractWe report the results of a solid-state 31P nuclear magnetic resonance (NMR) spectroscopic investigation of the acidocalcisome organelles from Trypanosoma brucei (bloodstream form), Trypanosoma cruzi and Leishmania major (insect forms). The spectra are characterized by a broad envelope of spinning sidebands having isotropic chemical shifts at ∼0, −7 and −21 ppm. These resonances are assigned to orthophosphate, terminal (α) phosphates of polyphosphates and bridging (β) phosphates of polyphosphates, respectively. The average polyphosphate chain length is ∼3.3 phosphates. Similar results were obtained with whole L. major promastigotes. 31P NMR spectra of living L. major promastigotes recorded under conventional solution NMR conditions had spectral intensities reduced with respect to solution-state NMR spectra of acid extracts, consistent with the invisibility of the solid-state phosphates. These results show that all three parasites contain large stores of condensed phosphates which can be visualized by using magic-angle spinning NMR techniques