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Defect Reduction in MBE-Grown AlN by Multicycle Rapid Thermal Annealing
Jordan D. Greenlee,Brendan Gunning,Boris N. Feigelson,Travis J. Anderson,Andrew D. Koehler,Karl D. Hobart,Francis J. Kub,W. Alan Doolittle 대한금속·재료학회 2016 ELECTRONIC MATERIALS LETTERS Vol.12 No.1
Multicycle rapid thermal annealing (MRTA) is shown to reduce thedefect density of molecular beam epitaxially grown AlN films. Nodamage to the AlN surface occurred after performing the MRTA processat 1520°C. However, the individual grain structure was altered, with theemergence of step edges. This change in grain structure and diffusion ofAlN resulted in an improvement in the crystalline structure. The RamanE2 linewidth decreased, confirming an improvement in crystal quality. The optical band edge of the AlN maintained the expected value of6.2 eV throughout MRTA annealing, and the band edge sharpened afterMRTA annealing at increased temperatures, providing further evidence ofcrystalline improvement. X-ray diffraction shows a substantial improvementin the (002) and (102) rocking curve FWHM for both the 1400 and1520°C MRTA annealing conditions compared to the as-grown films,indicating that the screw and edge type dislocation densities decreased. Overall, the MRTA post-growth annealing of AlN lowers defect density,and thus will be a key step to improving optoelectronic and powerelectronic devices.
Poisson spectra in polynomial algebras
Jordan, D.A.,Oh, S.Q. Academic Press 2014 Journal of algebra Vol.400 No.-
A significant class of Poisson brackets on the polynomial algebra C[x<SUB>1</SUB>,...,x<SUB>n</SUB>] is studied and, for this class of Poisson brackets, the Poisson prime ideals, Poisson primitive ideals and symplectic cores are determined. Moreover it is established that these Poisson algebras satisfy the Poisson Dixmier-Moeglin equivalence.
Digital Museum of Retinal Ganglion Cells with Dense Anatomy and Physiology
Bae, J. Alexander,Mu, Shang,Kim, Jinseop S.,Turner, Nicholas L.,Tartavull, Ignacio,Kemnitz, Nico,Jordan, Chris S.,Norton, Alex D.,Silversmith, William M.,Prentki, Rachel,Sorek, Marissa,David, Celia,Jo Elsevier 2018 Cell Vol.173 No.5
<P><B>Summary</B></P> <P>When 3D electron microscopy and calcium imaging are used to investigate the structure and function of neural circuits, the resulting datasets pose new challenges of visualization and interpretation. Here, we present a new kind of digital resource that encompasses almost 400 ganglion cells from a single patch of mouse retina. An online “museum” provides a 3D interactive view of each cell’s anatomy, as well as graphs of its visual responses. The resource reveals two aspects of the retina’s inner plexiform layer: an arbor segregation principle governing structure along the light axis and a density conservation principle governing structure in the tangential plane. Structure is related to visual function; ganglion cells with arbors near the layer of ganglion cell somas are more sustained in their visual responses on average. Our methods are potentially applicable to dense maps of neuronal anatomy and physiology in other parts of the nervous system.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A digital “museum” provides dense anatomy and physiology of retinal ganglion cells </LI> <LI> The inner plexiform layer divides into four sublaminae defined by anatomical criteria </LI> <LI> The aggregate neurite density of a ganglion cell type is approximately uniform </LI> <LI> Inner marginal ganglion cells exhibit significantly more sustained visual responses </LI> </UL> </P> <P><B>Graphical Abstract</B></P> <P>[DISPLAY OMISSION]</P>
Sedgwick, Adam C.,Gardiner, Jordan E.,Kim, Gyoungmi,Yevglevskis, Maksims,Lloyd, Matthew D.,Jenkins, A. Toby A.,Bull, Steven D.,Yoon, Juyoung,James, Tony D. Royal Society of Chemistry 2018 Chemical communications Vol.54 No.38
<▼1><P>Two ‘turn on’ TCF-based fluorescence probes were developed for the detection of biological thiols (<B>TCF-GSH</B> and <B>TCFCl-GSH</B>).</P></▼1><▼2><P>Two ‘turn on’ TCF-based fluorescence probes were developed for the detection of biological thiols (<B>TCF-GSH</B> and <B>TCFCl-GSH</B>). <B>TCF-GSH</B> was shown to have a high sensitivity towards glutathione (GSH) with a 0.28 μM limit of detection. Unfortunately, at higher GSH concentrations the fluorescence intensity of <B>TCF-GSH</B> decreased and toxicity was observed for <B>TCF-GSH</B> in live cells. However, <B>TCFCl-GSH</B> was shown to be able to detect GSH at biologically relevant concentrations with a 0.45 μM limit of detection. No toxicity was found for <B>TCFCl-GSH</B> and a clear ‘turn on’ with good photostability was observed for the exogenous addition of GSH, Cys and HCys. Furthermore, <B>TCFCl-GSH</B> was used to evaluate the effects of drug treatment on the levels of GSH in live cells.</P></▼2>
Brent D. Oja,Jordan R. Bass,Brian S. Gordon 글로벌지식마케팅경영학회 2020 Journal of Global Sport Management Vol.5 No.3
Social identity theory (SIT) has proven to be a popular topic ofdiscourse in academia. Scholars in the field of sport managementhave predominantly focused on team identification and howsport fans align with their favorite teams. However, recent developments have explored how sport employees identify with theirsport organizations. To date, the maturation of theory involvingsport employee identification (SEI) has only reached the conceptual stage. This study is intended to fill the void in the literatureby creating a psychometric instrument to specifically measure SEI. The results indicate that SEI is a composite of two distinct butrelated factors, named sport affinity and collective enhancement. The instrument was subjected to and passed various reliabilityand validity tests. The appropriateness of using team identification variables to measure sport employees’ social identities is alsodiscussed. Lastly, theoretical and practical implications for the useof the instrument are provided.