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This study estimates the association of participation in a nine-week online educational program to prepare students for post-graduate (juris doctorate) education and law school grades. We collected registrar data from 17 U.S. law schools for participants and non-participants from the same year and a prior year. We compared first-semester law school grades between participating and non-participating students weighted by propensity scores. Course participation was associated with improved first-semester grades in a keyed course (Contracts Law) and overall grade point average. According to pre- and post-survey responses, a substantial portion of those who completed the program reported feeling more prepared for law school.

Selective area growth (SAG) of gallium nitride (GaN) on silicon (Si) wafers efficiently relaxes the tensile stress that is generated in the GaN layer, when the structure is cooled down to room temperature after the growth. Hence, SAG enables the growth of thicker layers that are capable of operating at higher voltages than those grown in 2D layers. In this study, two GaN layers are grown by SAG on 200 mm-diameter Si(111) wafers by metal organic vapor phase epitaxy for the fabrication of pseudo-vertical p–n diodes. During the growth, the SiH4 precursor flow for the first sample was double than that for the second one. The uniformity of the doping concentration of the layers is investigated by scanning spreading resistance microscopy and the p- and n-type doped regions are examined by scanning capacitance microscopy. A low net doping concentration of 1.4 × 1016 cm−3 is extracted from capacitance–voltage measurements and a destructive breakdown occurs at 700 V for a 90 μm-diameter pseudo-vertical p–n diode. These results show the high potential of the SAG of GaN on Si wafers for vertical power devices. [ABSTRACT FROM AUTHOR]

This document presents the physics case and ancillary studies for the proposed CODEX-b long-lived particle (LLP) detector, as well as for a smaller proof-of-concept demonstrator detector, CODEX-β, to be operated during Run 3 of the LHC. Our development of the CODEX-b physics case synthesizes ‘top-down’ and ‘bottom-up’ theoretical approaches, providing a detailed survey of both minimal and complete models featuring LLPs. Several of these models have not been studied previously, and for some others we amend studies from previous literature: In particular, for gluon and fermion-coupled axion-like particles. We moreover present updated simulations of expected backgrounds in CODEX-b’s actively shielded environment, including the effects of shielding propagation uncertainties, high-energy tails and variation in the shielding design. Initial results are also included from a background measurement and calibration campaign. A design overview is presented for the CODEX-β demonstrator detector, which will enable background calibration and detector design studies. Finally, we lay out brief studies of various design drivers of the CODEX-b experiment and potential extensions of the baseline design, including the physics case for a calorimeter element, precision timing, event tagging within LHCb, and precision low-momentum tracking.

In this paper, we report the use of three pendeo-epitaxy growth approaches as a way of reducing the threading dislocation density (TDD) of 20 × 20 μm2 GaN platelets to be used for the development of micro light-emitting diodes (μLEDs). The method relies on the coalescence of GaN crystallites grown on top of a network of deformable pillars etched into a silicon-on-insulator substrate. Our approach takes advantage of the creeping properties of SiO2 at the usual GaN epitaxial growth temperature, allowing the GaN crystallites to align and reduce the grain boundary dislocations. Furthermore, this bottom-up approach allows to get rid of the dry plasma etching step for μLEDs fabrication, which highly deteriorates sidewalls, reducing the efficiency of future displays. By optimizing the growth conditions and inducing asymmetric nucleation, a TDD of 2.5 × 108 cm−2 has been achieved on the GaN platelets, while keeping a smooth surface. [ABSTRACT FROM AUTHOR]

Fires are a natural phenomenon in the boreal forest, but their frequency is expected to increase over the coming century. Fires may affect water quality and invertebrates in lakes, but there have been few studies in the northern boreal forest to describe these impacts. We collected data on water quality, macrophytes, and invertebrates from 20 lakes in the Sahtu Settlement Area of the Northwest Territories. Nine lakes were affected by fires in their catchments 4-5 years before data collection, while eleven were not. Our results showed that few water quality variables were associated with fires. However, remote sensing and field observations suggested that macrophyte biomass was higher in lakes affected by burns, and this variable was a significant predictor of invertebrate composition. Burn history was an important predictor of the richness and abundance of invertebrates, but natural variability in lake properties was more important for explaining differences among lakes. Our results suggest that a better understanding of the effects of wildfires might be gained by examining how postfire changes in macrophytes affect other trophic levels. Si le feu est un phenomene naturel dans la foret boreale, sa frequence est appelee a augmenter au cours du siecle a venir. Bien que le feu puisse avoir une incidence sur la qualite de l'eau et les invertebres dans les lacs, peu d'etudes dans la foret boreale septentrionale ont decrit ces effets. Nous avons recueilli des donnees sur la qualite de l'eau, les macrophytes et les invertebres de 20 lacs dans la region designee du Sahtu des Territoires-du-Nord-Ouest. Il y avait eu des feux dans les bassins versants de neuf de ces lacs au cours de 4-5 annees precedant la collecte de donnees, mais non dans ceux des onze autres lacs. Nos resultats demontrent que peu de variables relatives a la qualite de l'eau sont associees aux feux. La teledetection et des observations de terrain donnent toutefois a penser que la biomasse de macrophytes est plus grande dans les lacs touches par le feu, et cette variable constitue un predicteur significatif de la composition des invertebres. L'historique des feux est un important predicteur de la richesse et de l'abondance des invertebres, mais la variabilite naturelle des proprietes des lacs est plus importante pour ce qui est d'expliquer les differences entre lacs. Nos resultats indiqueraient qu'une meilleure comprehension des effets des feux pourrait etre obtenue en examinant l'incidence des changements touchant les macrophytes apres un feu sur d'autres niveaux trophiques. [Traduit par la Redaction], Introduction Climate change is leading to an increase in the frequency of disturbance in northern terrestrial and aquatic ecosystems, including increases in biological pathogens (Weed et al. 2013), changing hydrological [...]

In this work, fully vertical GaN trench MOSFETs were fabricated and characterized to evaluate their electrical performances. Transistors show a normally-OFF behavior with a high ION/IOFF (~109) ratio and a significantly small gate leakage current (10−11 A/mm). Thanks to an improved resistance partitioning method, the resistances of the trench bottom and trench channel were extracted accurately by taking into account different charging conditions. This methodology enabled an estimation of the effective channel and bottom mobility of 11.1 cm2/V·s and 15.1 cm2/V·s, respectively. [ABSTRACT FROM AUTHOR]

This study focuses on the impact of negative fixed charge, achieved through fluorine (F) implantation, on breakdown voltage (BV) enhancement in vertical GaN Schottky diodes. Several device and implant-related parameters are examined using Synopsys Sentaurus TCAD simulations in order to determine the optimum fixed negative charge concentration required to achieve the highest BV. The simulated structure consisted of a Schottky diode with a box consisting of negative fixed charges to achieve the edge termination of the Schottky device. An empirical equation is proposed to determine the optimum fixed charge concentration for the highest BV based on depth. The simulation also considered implantation profiles derived from SIMS data from an actual device implanted with multi-energy and multi-dose F. It is demonstrated that the BV has a similar dependence on the key parameters like in the box profile. In summary, this work provides valuable insights into optimizing edge termination techniques using negative fixed charge for improved BV in vertical GaN power devices. [ABSTRACT FROM AUTHOR]

In this work, a GaN-on-Si quasi-vertical Schottky diode was demonstrated on a locally grown n-GaN drift layer using Selective Area Growth (SAG). The diode achieved a current density of 2.5 kA/cm2, a specific on-resistance R O N , s p of 1.9 mΩ cm2 despite the current crowding effect in quasi-vertical structures, and an on/off current ratio (Ion/Ioff) of 1010. Temperature-dependent current–voltage characteristics were measured in the range of 313–433 K to investigate the mechanisms of leakage conduction in the device. At near-zero bias, thermionic emission (TE) was found to dominate. By increasing up to 10 V, electrons gained enough energy to excite into trap states, leading to the dominance of Frenkel–Poole emission (FPE). For a higher voltage range (−10 V to −40 V), the increased electric field facilitated the hopping of electrons along the continuum threading dislocations in the "bulk" GaN layers, and thus, variable range hopping became the main mechanism for the whole temperature range. This work provides an in-depth insight into the leakage conduction transport on pseudo-vertical GaN-on-Si Schottky barrier diodes (SBDs) grown by localized epitaxy. [ABSTRACT FROM AUTHOR]

Previous research demonstrates that writing about life’s difficult moments benefits the writer cognitively and emotionally. However, it is unclear whether the benefits of writing are specific to the event written about or whether the benefits are global. This study was designed to address this issue. Participants were 120 undergraduate students who had experienced at least two difficult life events. Participants were randomly assigned into experimental and control groups. Experimental participants wrote about one of these difficult events and control participants wrote about an interesting life event of their choosing. Experimental participants reported their positive and negative emotions as well as their cognitive avoidance and intrusion concerning the event written about and another event not written about. Control participants reported their emotions and cognitions concerning two difficult life events. All participants also reported their general distress. These assessments were done immediately after writing and one week later. The results indicated that experimental participants were emotionally stronger, less upset, and less cognitively avoidant about the particular difficult life event they wrote about compared to an event they did not write about. Similar comparisons between ratings of a written-about and a not-written-about event were not significant for passion, fear, and cognitive intrusion. There was evidence for a possible indirect effect of writing on general distress through changes in event-specific cognitions and emotions. Discussion of these results focuses on how writing may specifically help change a writer’s feelings and thoughts about a particular situation.

During middle childhood, Chinese boys are particularly at risk to develop both externalizing (e.g., overt aggression) and internalizing behavioral problems (e.g., social withdrawal). A possible contributor to these problems is that boys cannot regulate their anger very well. Inability to manage anger may cause a particular social challenge for Chinese boys. Open expression of anger may be prohibited by prevailing Chinese cultural norms, because it emphasizes individuality over harmony. But anger is a socially disengaging emotion which works against social harmony. This situation requires Chinese boys to manage and express anger appropriately in social interactions. Based on the hierarchical model of social relationships and the three trends of human interactions, this study examined three pathways—aggression, social withdrawal, and sociability-leadership—that lead from Chinese boys’ anger dysregulation to their lower social status among peers at school. Participants of this study were 267 boys in Grades 3-6 from an elementary school in urban China. A self-report questionnaire of anger dysregulation was used to evaluate how often Chinese boys express their anger in dysregulated ways (e.g., attacking things or people). Peer nominations were used to measure children’s overt aggression (moving against peers), social withdrawal (moving away from peers), and sociability-leadership (moving toward peers). Social status was assessed by a sociometric measure which evaluates the degree to which children were liked by their classmates. Results showed that boys’ anger dysregulation was negatively associated with their social status. Moreover, aggression, social withdrawal, and social skills fully mediated this association. This study enriches our understanding of the mechanisms linking anger dysregulation to lower social status and provides practical implications to help Chinese boys improve social and emotional functioning in middle childhood.

Although, as a result of the introduction of the Teaching Excellence Framework, the principle of teaching excellence is receiving renewed attention in English higher education, the idea has been left largely undefined. The cynic might argue, in agreement with Bill Readings, that this lack of a precise definition is deliberate, since teaching excellence is not designed to observe teaching but to permit an integrated system of accounting. This article, however, develops a different line of criticism. Following Readings's characterization of "excellence" as symptomatic of the "Americanization" of higher education, it traces the principle of teaching excellence in English educational discourse back to the influence of debates, led by Ernest Boyer in the US, concerning the teaching-research nexus. Contextualizing these debates in relation to ideas about the learning society influenced by theories of human capital and investment in national productivity, it takes issue with descriptions of recent policy that overemphasize the corporate structure of the university and its vision of the student as consumer at the expense of recognizing the continuation of the nation-state organization of the student as producer. Reconnecting this broader framework back to the teaching-research nexus, the article examines how this intersects with the dominant agenda of research-led teaching excellence, centred on the idea of the productivity of research, and outlines an alternative notion of teaching-led research, developed out of the work of Boyer and Walter Benjamin, within which teaching might continue, in spite of excellence.

We present two cases of coronavirus disease 2019 (COVID-19)-related laryngotracheitis in good-prognosis, ventilated patients who had failed extubation. As the pandemic continues to unfold across the globe and better management of those with respiratory failure develops, this may be an increasingly common scenario. Close ENT-intensivist liaison, meticulous team preparation, early consideration of rigid endoscopy and prospective data collection and case sharing are recommended.

We present two cases of coronavirus disease 2019 (COVID-19)-related laryngotracheitis in good-prognosis, ventilated patients who had failed extubation. As the pandemic continues to unfold across the globe and better management of those with respiratory failure develops, this may be an increasingly common scenario. Close ENT-intensivist liaison, meticulous team preparation, early consideration of rigid endoscopy and prospective data collection and case sharing are recommended.