Publications
Permanent URI for this collection
Browse
Search Collection
1 - 5 of 62053
-
ArticleCourting the Sharks: The Influence of CEO Narcissistic Admiration and Rivalry on New Venture Funding(INFORMS, 2025-05-12)We draw from the social psychology literature to introduce an alternative conceptualization of executive narcissism—narcissistic admiration and rivalry. In the context of chief executive officers (CEOs) pitching to investors, we theorize how narcissistic CEOs may use distinct behavioral strategies to pursue status, thereby shaping investor sentiment and ultimately affecting investors’ funding decisions. Using Shark Tank data, we find evidence that narcissistic admiration and rivalry are associated with opposing patterns in new venture funding, as shaped by investor sentiment. Specifically, CEO narcissistic admiration is positively associated with new venture funding by increasing investor sentiment, whereas CEO narcissistic rivalry is negatively associated with new venture funding by decreasing investor sentiment. These results highlight the need to separate narcissistic admiration and rivalry in executive narcissism research and illustrate the underlying mechanisms through which executive narcissism shapes organizational outcomes. Overall, this study provides new insights into two pathways of executive narcissism and offers evidence consistent with the idea that executive narcissism matters in entrepreneurial contexts.
-
ArticleTurning Enzyme Models into Model Enzymes in a Substrate-Tailored, Desolvated Active Site(American Chemical Society, 2025-05-12)Once taken out of the active sites, the same functional groups used by enzymes for catalysis tend to lose their “magical” catalytic power in small-molecule enzyme models. We report a small-molecule enzyme model that activates a benzylic alcohol by a nearby amine for the nucleophilic attack of an activated ester. Only when the two groups are placed inside a substrate-tailored hydrophobic pocket can they display catalytic turnovers and even become reactive enough to hydrolyze amides catalytically near physiological conditions, a long-standing goal for synthetic protease mimics. These results suggest that the large gap between the innumerable catalytically incompetent small-molecule enzyme models made by chemists and true enzyme-like catalysts could be bridged by environmental engineering, which in this work enables a simple combination of a tertiary amine and an alcohol to replicate the catalytic properties of serine protease in hydrolyzing aryl amides with substrate specificity.
-
ArticleRelative Pose Estimation of an Uncooperative Target with Camera Marker Detection(Multidisciplinary Digital Publishing Institute (MDPI), 2025-05-10)Accurate and robust relative pose estimation is the first step in ensuring the success of an active debris removal mission. This paper introduces a novel method to detect structural markers on the European Space Agency’s Environmental Satellite (ENVISAT) for safe de-orbiting using image processing and Convolutional Neural Networks (CNNs). Advanced image preprocessing techniques, including noise addition and blurring, are employed to improve marker detection accuracy and robustness from a chaser spacecraft. Additionally, we address the challenges posed by eclipse periods, during which the satellite’s corners are not visible, preventing measurement updates in the Unscented Kalman Filter (UKF). To maintain estimation quality in these periods of data loss, we propose a covariance-inflating approach in which the process noise covariance matrix is adjusted, reflecting the increased uncertainty in state predictions during the eclipse. This adaptation ensures more accurate state estimation and system stability in the absence of measurements. The initial results show promising potential for autonomous removal of space debris, supporting proactive strategies for space sustainability. The effectiveness of our approach suggests that our estimation method, combined with robust noise adaptation, could significantly enhance the safety and efficiency of debris removal operations by implementing more resilient and autonomous systems in actual space missions.
-
ArticleInterplay between auxin and abiotic stresses in maize(Oxford University Press on behalf of the Society for Experimental Biology, 2025-05-10)Plants display a continuum of responses to abiotic stresses, including sensitivity and tolerance. Classical phytohormones have been implicated in these processes due to the observed changes in growth phenotypes following stress cues. This interplay is often described as the growth–stress trade-off. Recent studies have examined abiotic stress responses in maize and implicated auxin biosynthesis, transport, and signaling. However, very few auxin pathway genes have been functionally characterized for their role in stress responses in maize, leaving a large knowledge gap in the field. In this review we will describe our current understanding of relationships between auxin and a myriad of stresses, including temperature, drought, salinity, light, and heavy metals. Resilience to environmental stresses is critical for informing agricultural strategies to improve maize yield and quality. We conclude with a discussion of possible future directions and approaches that may increase our understanding of how auxin mediates growth–stress trade-offs in maize.
-
ArticleHigh-velocity nasal insufflation in dogs with left-sided congestive heart failure unresponsive to traditional oxygen therapy: a retrospective case series(Frontiers, 2025-05-09)Objective: To describe high–velocity nasal insufflation (HVNI) for managing dogs with left–sided congestive heart failure (L–CHF) failing traditional oxygen therapy (TOT). To secondarily evaluate complications based on retrospective evaluation of the record of HVNI and survival to discharge. Design: Retrospective case series from a university teaching hospital between August 2019 and October 2021. Animals: Twelve dogs diagnosed with L-CHF and managed with HVNI. Measurements and main results: Medical records were retrospectively reviewed for signalment, point-of-care diagnostics, and HVNI information. Nine dogs were diagnosed with myxomatous mitral valve disease, and three dogs were diagnosed with dilated cardiomyopathy. All dogs in this study required HVNI after failing TOT. Dogs were treated with HVNI for a median of 14 h (range 2–22 h). HVNI was successfully discontinued in 10 dogs (83%), all of which survived to discharge. Two dogs on HVNI were humanely euthanized, both of which were diagnosed with Stage D refractory CHF. No major complications of HVNI were noted in any dogs. Conclusion: HVNI is a potential method of escalating oxygen support for dogs in L-CHF who fail TOT. In this case series, all dogs in which HVNI was successfully discontinued survived to discharge.