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The current administration has disproportionately targeted transgender, nonbinary, and gender nonconforming people, despite accounting for less than 1% of the population (Jones, 2024). Though there has been a flurry of executive orders issued restricting the rights of this population, Executive Order 14168 (i.e., Defending Women from Gender Ideology Extremism and Restoring Biological Truth to the Federal Government) and Executive Order 14151 (Ending Radical and Wasteful Government DEI Programs and Preferencing) are likely to be particularly impactful for workplaces. This is because Executive Order 14168 challenges the existing federal protections of the Civil Rights Act of 1964 extended through Bostock v. Clayton County (2020), by declaring sex as binary and biological and denying the existence of transgender people. In addition, EO14151 eliminates federal diversity, equity, and inclusion programs and practices, which limits organizational practices and policies that might otherwise create inclusive and equitable environments for transgender employees. Therefore, this policy brief aims to discuss these executive orders, the existing protections they aim to alter, and the potential implications for transgender employees, organizations, and industrial-organizational professionals.
We consider the Perron–Frobenius operator defined on the space of functions of bounded variation for the beta-map $\tau _\beta (x)=\beta x$ (mod $1$) for $\beta \in (1,\infty )$, and investigate its isolated eigenvalues except $1$, called non-leading eigenvalues in this paper. We show that the set of $\beta $ such that the corresponding Perron–Frobenius operator has at least one non-leading eigenvalue is open and dense in $(1,\infty )$. Furthermore, we establish the Hölder continuity of each non-leading eigenvalue as a function of $\beta $ and show in particular that it is continuous but non-differentiable, whose analogue was conjectured by Flatto, Lagarias and Poonen in [The zeta function of the beta transformation. Ergod. Th. & Dynam. Sys.14 (1994), 237–266]. In addition, for an eigenfunctional of the Perron–Frobenius operator corresponding to an isolated eigenvalue, we give an explicit formula for the value of the functional applied to the indicator function of every interval. As its application, we provide three results related to non-leading eigenvalues, one of which states that an eigenfunctional corresponding to a non-leading eigenvalue cannot be expressed by any complex measure on the interval, which is in contrast to the case of the leading eigenvalue $1$.
Increasing senior leadership diversity and decentralizing decision-making have become imperatives for many organizations, supported by a growing normative literature. However, mixed empirical evidence suggests that these may hinder the decision-making processes required to deliver value to firms and their stakeholders. We argue that diversity and decentralization should instead be viewed as means of organizing towards these ends, and theorize the conditions under which they may harm performance – specifically, the nature of the knowledge problems faced by leaders. Analyzing a 19-year panel of 922 U.S. firms, we find that diversity and decentralization are associated with stronger financial and market performance in uncertain environments but become liabilities under ambiguity, where speed and strategic clarity are critical and homogeneous, centralized leadership is more effective. Stakeholder outcomes are similarly affected, particularly employee wellbeing and ethical political activity. These findings challenge normative claims, with implications for theory, proscriptions, and practice.
We strengthen known results on Diophantine approximation with restricted denominators by presenting a new quantitative Schmidt-type theorem that applies to denominators growing much more slowly than in previous works. In particular, we can handle sequences of denominators with polynomial growth and Rajchmann measures exhibiting arbitrary slow decay, allowing several applications. For instance, our results yield non-trivial lower bounds on the Hausdorff dimensions of intersections of two sets of inhomogeneously well-approximable numbers (each with restricted denominators) and enable the construction of Salem subsets of well-approximable numbers of arbitrary Hausdorff dimension.
Implantable haemodynamic monitors allow remote monitoring of Fontan circulation. We report unique opportunities and challenges related to device use in rural, high-altitude regions.
Objectives:
Assess the performance of implantable haemodynamic monitor in Fontan circulation and identify potential sources of measurement discrepancy defined as non-physiological, negative, or significantly lower reading than baseline.
Methods:
We performed a retrospective review of patients who underwent implantable haemodynamic monitor implantation from September 2021 to April 2024 (n = 17) at our centre (∼1,000 feet above sea level; ASL) and identified those with sensor discrepancies.
Results:
During a mean follow-up duration of 26 months (range 13–44 months), there were no procedure-related complications, thromboembolism, or device displacement. Ten patients lived in rural, higher-altitude regions (average altitude 5100 feet above sea level, average distance from centre ∼160 miles, range = 100–400 miles). Challenges in remote monitoring included unreliable home-internet connection, non-compliance, and difficulty performing device recalibration at patient’s home altitude. Sensor discrepancies were noted in 7 patients (41%), of whom 6 (86%) lived remotely. Manual review of the waveforms identified sources of discrepancy, including misinterpretation of the non-pulsatile pressure waveform (n = 3), offset due to change in hospital-interrogation unit (n = 4), and sensor drift (n = 1). Altitude change did not directly affect sensor performance. We were able to apply corrective interventions in 4/7 sensors, including Fontan-specific settings (overriding pulsatility), and back-end recalibration, which were effective in improving device accuracy.
Conclusions:
Implantable haemodynamic monitors are a promising tool for monitoring Fontan circulation but may require modified settings and careful attention to potential interpretation errors. Home monitoring remains challenging for rural, high-altitude residents with limited resources.
Biologically inspired aero/hydrodynamics attracts considerable interest because of promising efficiency and manoeuvring capabilities. Yet, the influence that external perturbations, typical of realistic environments, can have over the flow physics and aerodynamic performance remains a scarcely investigated issue. In this work, we focus on the impact of free stream turbulence (FST) on the aerodynamics of a flapping wing with a prescribed (heaving and pitching) motion at a chord-based Reynolds number of 1000. The problem is tackled by means of direct numerical simulations using an immersed boundary method and a synthetic turbulence generator. The effect of two key parameters, i.e. the turbulence intensity and integral length scale of FST, is described by characterising the phase- and spanwise-averaged flows and aerodynamic coefficients. In particular, we show how FST effectively enhances the dissipation of the vortices generated by the flapping wing once they are sufficiently downstream of the leading edge. The net (i.e. time-averaged) thrust is found to be marginally sensitive to the presence of FST, whereas the characteristic aerodynamic fluctuations appear to scale linearly with the turbulence intensity and sublinearly with the integral length scale. Moreover, we reveal a simple mechanism where FST triggers the leading-edge vortex breakup, which in turns provides the main source of aerodynamic disturbances experienced by the wing. Finally, we show how the frequency spectra of the aerodynamic fluctuations are governed by the characteristic time scales involved in the problem.
A set of 710 accessions of global durum wheat panel was obtained from the International Centre for Agricultural Research in Dryland Areas (ICARDA) and evaluated for variability in 32 agro-morphological traits at the ICAR-Indian Institute of Wheat and Barley Research, Karnal, India, during 2021–22 and 2022–23. The accessions were grouped based on the type of breeding material and geographical origin, and the Shannon–Wiener diversity index (H′) was calculated for each trait as well as each group. The H′ values ranged from 0.02 (grain crease) to 1.27 (wax of ear) with an overall mean of 0.63, when considering the entire set as a single group. Landraces exhibited higher variability (H′ = 0.64) as compared to released cultivars and evolutionary pre-breeding population lines (H′ = 0.55). Furthermore, accessions originating from West Asia exhibited the highest variability (H′ = 0.63). Traits such as coleoptile colour, plant growth habit, auricle colour and pubescence, flag leaf attitude, ear shape, presence or absence of awns, awns colour and attitude, glumes shape and pubescence, beak length, peduncle attitude, grain phenol colour, grain germ width and brush hair length were found suitable for distinguishing the present durum accessions due to their higher frequency distribution and Shannon–Wiener diversity index values. A core set of 13 accessions was developed using the programme Power Core. These accessions represent the overall variability of the entire set and can therefore serve as a potential source of new genes/alleles for the genetic enhancement of durum wheat. This durum panel may also serve as a valuable reference collection for global researchers in the characterization of durum wheat accessions.
Interactions between shock waves and gas bubbles in a liquid can lead to bubble collapse and high-speed liquid jet formation, relevant to biomedical applications such as shock wave lithotripsy and targeted drug delivery. This study reveals a complex interplay between acceleration-induced instabilities that drive jet formation and radial accelerations causing overall bubble collapse under shock wave pressure. Using high-speed synchrotron X-ray phase contrast imaging, the dynamics of micrometre-sized air bubbles interacting with laser-induced underwater shock waves are visualised. These images offer full optical access to phase discontinuities along the X-ray path, including jet formation, its propagation inside the bubble, and penetration through the distal side. Jet formation from laser-induced shock waves is suggested to be an acceleration-driven process. A model predicting jet speed based on the perturbation growth rate of a single-mode Richtmyer–Meshkov instability shows good agreement with experimental data, despite uncertainties in the jet-driving mechanisms. The jet initially follows a linear growth phase, transitioning into a nonlinear regime as it evolves. To capture this transition, a heuristic model bridging the linear and nonlinear growth phases is introduced, also approximating jet shape as a single-mode instability, again matching experimental observations. Upon piercing the distal bubble surface, jets can entrain gas and form a toroidal secondary bubble. Linear scaling laws are identified for the pinch-off time and volume of the ejected bubble relative to the jet’s Weber number, characterising the balance of inertia and surface tension. At low speeds, jets destabilise due to capillary effects, resulting in ligament pinch-off.
Genebanks worldwide play a crucial role in the long-term conservation and accessibility of wide diversity of plant genetic resources (PGR). These resources are essential for addressing current and future challenges related to climate change and biodiversity loss, thereby contributing to agricultural production and sustainability. Enhancing the efficiency of genebanks requires implementing a quality management system that ensures data transparency, as well as the documentation and standardization of processes. This study proposes a set of 10 mandatory and 38 optional genebank metrics specifically designed for collections of orthodox seeds. These metrics define a set of basic parameters that are easy to calculate and collectively serve as a valuable tool for improving genebank management, enhancing performance, fostering transparency and promoting collaborations among institutions. Fourteen institutions engaged in the long-term conservation of PGR were consulted in the development of the proposed metrics. This work lays the foundation for the establishment of a widely accepted set of genebank metrics within the global genebank community. Further research and iterative development are necessary to formulate comprehensive metrics applicable to other ex situ conservation methods (such as cryopreservation, in vitro and field conservation) as well as in situ conservation strategies (including genetic reserves and on-farm conservation).
While conducting archaeological survey to document the large prehistoric canal systems in the central portion of the Tehuacán Valley, investigators recorded a mound and plaza complex that includes what appears to be an effigy mound in the shape of a scorpion. Large quantities of ceramics, including surface-decorated and polychromes, indicate a Late Classic and Postclassic occupation. The site is interpreted as being part of an intensive agricultural system as it appears centrally located in the context of highly developed agricultural and irrigation infrastructure. For the reasons described, we interpret this ca. 60 meter scorpion effigy mound as an intentional feature with possible astronomical alignments. It is hypothesized as being part of a local civic/ceremonial complex with the possible use/function of observing the summer and winter solstices. If so, it provides an insight into the integration of calendrical ritual with the surrounding complex system of fields and irrigation canals. Admittedly, these observations and explanations are relatively subjective. However, we consider them to be persuasive when the evidence is considered in its entirety.
Catches of yellowjackets (Hymenoptera: Vespidae) in traps baited with proteinaceous baits or a heptyl butyrate–based synthetic chemical lure in British Columbia, Canada, and Rio Negro, Argentina, differed among species. In British Columbia, western yellowjackets, Vespula pensylvanica (Saussure), responded preferentially to traps baited with rotisserie chicken (Galliformes: Phasianidae) over canned chicken or canned sardines (Clupeiformes, Clupeoidei), but the synthetic chemical lure was more attractive than rotisserie chicken. Counterintuitively, when rotisserie chicken and the synthetic chemical lure were combined, catches were reduced. In British Columbia, more German yellowjackets, V. germanica Fabricius, were caught in traps baited with rotisserie chicken than with canned chicken, and in Argentina, both German and common, V. vulgaris Linnaeus, yellowjackets preferred sardine-flavoured cat (Carnivora: Felidae) food over the synthetic chemical lure. In British Columbia, northern yellowjackets, V. alascensis (Packard), showed no preference among three types of chicken or between rotisserie chicken and canned sardines. When rotisserie chicken and the synthetic chemical lure were combined, catches of both northern and German yellowjackets were no higher than when traps were baited with rotisserie chicken alone. Resolution of the differential roles of red meat-, poultry-, and fish-based baits, as well as improvement of synthetic chemical lures, would be facilitated by identification of bioactive semiochemicals.
Environmental outcomes can be shaped by underlying politics. This study investigates whether pre-determined election timings affect these outcomes by combining electoral data with remote sensing data on crop burning, forest fires, slash-and-burn activity, and tree cover for 28 major states (covering approximately 3800 assembly constituencies) in India from 2008 to 2019. Analysing 71 elections during this period reveals evidence of the presence of electoral cycles in environmental outcomes, with non-election years experiencing higher levels of environmentally harmful activities compared to election years. These cycles are more pronounced when the incumbent’s party wins without a supermajority in state elections. The study further shows that specific factors, such as high-yield crop varieties, poverty levels, and Scheduled Tribe population proportions, also shape these environmental outcomes across the electoral cycle.
The Indo-Gangetic plains of India have been experiencing erratic weather and unpredictable rainfall patterns for the past 5 years, the average annual rainfall being 1200–1500 mm in the cropping season. Millets are generally grown in this region during the rainy season but environmental fluctuations result in heavy yield penalties in proso millet. Proso millet is one of the preferred crops of this region; however, it is very prone to yield loss due to flooding. Stability studies were conducted to investigate growing proso millet as a catch crop during summer (February–May) as it is a short-duration crop and can fit well in the existing cropping system. This study aims to determine the effect of genotype, environment and their interaction on grain yield and to identify more stable proso millet genotypes suitable for cultivation in the summer season. In total, 63 genotypes were evaluated for various agro-morphological traits for two summer and one kharif seasons. Stability analysis using a GGE biplot revealed that the proso millet performed better in the summer season than in the kharif season. This study has identified summer season as the most ideal environment for multilocation testing of wining genotypes RAU PM- 17, RAU PM-22, RAU PM-35, RAU PM-54, BR-7, TNAU-202 and TNAU-164 which has high stability for the summer season and can be used in breeding programmes as donor parents for traits like grain yield, 1000 grain weight, panicle length and number of productive tillers.