To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure no-reply@cambridge.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Unfortunately, P value multiplicity continues to be a pervasive threat to statistical validity in medical research. Performing many hypothesis tests, and treating them each as if they were a single hypothesis, leads to a dramatic increase in the risk of false research claims. This editorial describes a simple method for authors to avoid P value multiplicity while improving clarity of the findings for the reader.
This Research Paper investigates the hypothesis that variations in genes related to immune system function may influence the antioxidant potential of cow milk. The present study analysed the association between genotypes at selected osteopontin (OPN), chemokine receptor type 1 (CXCR1) and L-selectin (SELL) gene loci and the total antioxidant capacity of milk from 519 Polish Holstein–Friesian black-and-white cows. Genotyping at the genomic loci employed the polymerase chain reaction-restriction fragment-length polymorphism method, while the Trolox-equivalent antioxidant capacity method was used to measure milk TAC. The statistical method involves analysis of variance with Dunnett's post hoc tests. The results of analyses showed that the chosen genotypes as a TT (CXCR1 – c.291C > T), TT (CXCR1 – c. + 365 T > C) and TT (SELL – c.567C > T) combination was significantly associated with higher mean milk antioxidant capacity (P < 0.039). Therefore, analysing polymorphisms in genes related to the bovine immune system appears to be important in the context of selecting animals that produce milk with enhanced functional properties.
The white mullet, Mugil curema (Mugilidae), is a catadromous euryhaline fish with an omnivorous diet, and is distributed mainly along the Pacific and Atlantic coasts of the Americas. Mullets represent an important economic resource for the artisanal fisheries in Mexico. In this study, 73 individuals of M. curema were analysed; specimens were sampled in 4 coastal lagoons of the Yucatán Peninsula, Mexico, between 2022 and 2024. Parasite identification was accomplished by using DNA sequences. Nineteen parasite taxa were found, including 1 monopisthocotylan, 1 copepod, 1 acanthocephalan, 1 nematode, and 15 trematodes. Specimens were sequenced for a nuclear or mitochondrial molecular marker. Ten taxa are reported for the first time in this host species, including the adult trematodes Saccocoelioides olmecae; Schikhobalotrema sp. 1 and sp. 2, Hemiuridae gen. sp., the larval trematodes Mesostephanus microbursa, M. cubaensis, Cardiocephaloides medioconiger, Saccularina sp., Bucephalus sp., as well as the larval nematode Contracaecum fagerholmi. Of the 21 metazoan parasites recorded, 58% were adults and 42% were larval stages. The checklist of the metazoan parasites of M. curema was updated. Our study contributes to the understanding of the parasite diversity of an economically important fish species with a wide distribution range and corroborates the usefulness of combining morphological and molecular data for species identification and for linking larval forms with adults to complete parasite life cycles. Our results will be useful in further studies of parasites as bioindicators of ecosystem health, and studies of the role of parasites in food webs in coastal lagoons.
We investigate axisymmetric surfaces in Euclidean space that are stationary for the energy $E_\alpha=\int_\Sigma |p|^\alpha\, d\Sigma$. Using a phase plane analysis, we classify these surfaces under the assumption that they intersect the rotation axis orthogonally. We also provide applications of the maximum principle, characterizing closed stationary surfaces and compact stationary surfaces with circular boundary in the case $\alpha=-2$. Finally, we prove that helicoidal stationary surfaces must in fact be rotational surfaces.
Industrial and organizational (I-O) psychology recognizes dozens of different constructs, including several individual differences, environmental variables, job attitudes, and work-related behaviors. It is, of course, necessary to retain a variety of constructs in order to adequately capture the complexities, subtleties, and diversity of work-related phenomena. But do the many constructs recognized by I-O psychologists all serve a useful purpose? Or has our field been too eager to welcome redundant, unnecessary constructs into the fold? And if I-O psychology has embraced too many unnecessary constructs, then what—if anything—should we do about it? In the current focal article, we first discuss when and why construct proliferation occurs. We then advance a nuanced perspective—one that asserts that construct proliferation is occasionally “good,” usually “bad,” largely inevitable, and often incentivized. We conclude by calling for a temporary moratorium on the introduction of new constructs into the field of I-O psychology, and we offer suggestions for how the field can address construct proliferation. We hope that the current article leads to a fruitful discussion of how to most effectively solve the construct proliferation dilemma.
This study aimed to evaluate the effectiveness of the SmartNav in detecting tip fold-over during cochlear implantation and to compare angular insertion depth measurements obtained via SmartNav and transorbital X-ray imaging.
Methods
This retrospective multicentre study included patients with normal cochlear anatomy, comprising 163 individuals and 213 ears who underwent cochlear implantation using Nucleus CI522 and CI622 systems at Gazi University Faculty of Medicine and Gaziantep City Hospital.
Results
Of the 213 cochlear implantations, tip fold-over was detected in 4 implantations (1.88 per cent) intra-operatively with SmartNav. One case (0.47 per cent) of tip fold-over was not detected by SmartNav and identified post-operatively through X-ray imaging. SmartNav showed a sensitivity of 80 per cent, specificity of 100 per cent. A strong correlation was found between SmartNav and X-ray angular insertion depth measurements (p < 0.001).
Conclusion
The SmartNav is a reliable tool for the intra-operative detection of tip fold-overand the assessment of angular insertion depth in patients with normal cochlear anatomy.
We study the combined effects of natural convection and rotation on the dissolution of a solute in a solvent-filled circular cylinder. The density of the fluid increases with increasing concentration of the dissolved solute, and we model this using the Oberbeck–Boussinesq approximation. The underlying moving-boundary problem has been modelled by combining the Navier–Stokes equations with the advection–diffusion equation and a Stefan condition for the evolving solute–fluid interface. We use highly resolved numerical simulations to investigate the flow regimes, dissolution rates and mixing of the dissolved solute for $Sc = 1$, $Ra \in [10^5, 10^8]$ and $\varOmega \in [0, 2.5]$. In the absence of rotation and buoyancy, the distance of the interface from its initial position follows a square root relationship with time ($r_d \propto \sqrt {t}$), which ceases to exist at a later time due to the finite-size effect of the liquid domain. We then explore the rotation parameter, considering a range of rotation frequency – from smaller to larger, relative to the inverse of the buoyancy-induced time scale – and Rayleigh number. We show that the area of the dissolved solute varies nonlinearly with time depending on $Ra$ and $\varOmega$. The symmetry breaking of the interface is best described in terms of $Ra/\varOmega ^2$.
This paper investigates the aerodynamic and flow characteristics of a circular cylinder near the leading-edge separated flow of an elongated rectangular cylinder. The study varies the gap-to-diameter ratio (G/D) of 0 ≤ G/D ≤ 0.4 and distance-to-diameter ratio (L / D) of 0.6 ≤ L / D ≤ 5.8 in the subcritical Reynolds-number region. Here, D, G and L are the diameter of the circular cylinder, the gap between the two isomeric cylinders and the distance between the leading edge of the rectangular cylinder and the centre of the circular cylinder, respectively. Based on smoke-wire flow visualisations, particle image velocimetry test results, lift power spectral densities and pressure distributions, flow around the circular cylinder can be classified into three regimes, i.e. broadened body, body reattachment and co-shedding. In the broadened-body regime, gap flow is negligible, and the circular cylinder behaves as an extension of the rectangular cylinder. In the body-reattachment regime, the free shear layer separated from the rectangular cylinder’s leading edge reattaches to the circular cylinder forebody, significantly modifying its incoming flow. In the co-shedding regime, the free shear layer substantially alters the vortex shedding from the circular cylinder’s lower side, resulting in a distorted alternating vortex shedding from the circular cylinder. Both the drag and lift of the circular cylinder display distinct behaviours in the three flow regimes. Two primary flow modes are recognised through proper orthogonal decomposition analysis: an alternating vortex shedding mode and a one-sided shear flow mode, which result in two Strouhal numbers of 0.205 and 0.255, respectively.
Roll patterns on floating ice shelves have been suggested to arise from viscous buckling under compressive stresses. A model of this process is explored, allowing for a power-law fluid rheology for ice. Linear stability theory of uniformly compressing base flows confirms that buckling modes can be unstable over a range of intermediate wavelengths when gravity does not play a dominant role. The rate of compression of the base flow, however, ensures that linear perturbations have wavelengths that continually shorten with time. As a consequence, linear instability only ever arises over a certain window of time $t$, and its strength can be characterised by finding the net amplification factor a buckling mode acquires for $t\to \infty$, beginning from a given initial wavenumber. Bi-axial compression, in which sideways straining flow is introduced to prevent the thickening of the base flow, is found to be more unstable than purely two-dimensional (or uni-axial) compression. Shear-thinning enhances the degree of instability in both uni-axial and bi-axial flow. The implications of the theoretical results for the glaciological problem are discussed.
TEM analyses of germinal elements in miracidia and 6-day-old mother sporocysts of Echinostoma caproni were performed. Germinal elements in miracidia are represented by undifferentiated cells and germinal cells. They are localised in the posterior half of the body and form the primordium of the germinal mass, which plays the role of the gonad. In mother sporocysts the germinal mass is located caudally and plays the dual role of the gonad and the uterus. In addition to the undifferentiated cells and germinal cells, it contains embryos, which develop there up to the stage of germinal balls and then move into the sporocyst’s schizocoel, which plays the role of the brood chamber. New germinal cells are formed only by division of undifferentiated cells. No differences between undifferentiated and germinal cells in miracidia and those in sporocysts were found.
Panel data often contain stayers and slow movers. The literature proposes an estimator for the average partial effects (APEs) for this setting without a formal theory. The literature is also silent about inference in the presence of stayers and many slow movers. We contribute to this state of the art. First, we develop an asymptotic theory to guarantee that such an estimator is consistent in the presence of stayers and slow movers. Second, we propose its standard error. Third, we relax the existing assumption to allow for “many” slow movers. Fourth, we generalize the existing estimator. Fifth, we establish that this generalized estimator can achieve larger extents of bias reduction and hence faster convergence rates. Simulation studies demonstrate that the conventional 95% confidence interval covers the true value of the APE with 37%–93% frequencies whereas our proposed one achieves 93%–96% coverage frequencies. Using the U.S. Panel Study of Income Dynamics, we find that estimates of the marginal propensity to consume based on our generalized estimator remarkably differ in values from those of the existing estimators. Moreover, the generalized estimator achieves more than three times as small standard errors as those of the existing robust estimator.
UK food system transformation is urgently needed, but to date, minimal research has investigated ‘blue foods’ probably because they are ethically nuanced. There exists a paradox whereby materially deprived communities should be eating more fish to meet nutritional requirements, yet there is a global ‘red flag’ around global overfishing. New collaborative and creative solutions are, therefore, needed to tackle such food system inequities. By working together, all voices can be equally heard when decisions are being made to improve the system. Similarly, innovation and disruption of established supply chains will enable better access to healthy, affordable and tasty food that will support better nutrition, health and wellbeing. This review paper will present a critique of the ‘The Plymouth Fish Finger’ as a collaborative social innovation case study. Part of the FoodSEqual research project, this exploratory pilot project championed ‘co-production’ approaches to achieve multiple (potential) impacts. This review will critically explore how this social innovation case study has exemplified the complex interplay between factors driving distortions in access to and availability of fish within the local food system. Through collaborative multi-stakeholder (transdisciplinary) processes, using participatory creative methods, new strategies and recommendations for research, practice, action and policy are informed, all of which offer great potential for progressive and transformative systemic (blue) food system change.
We find that CEO compensation increases following acquisitions only in those deals in which acquirer stock is used as the method of payment. These compensation increases are driven by increases in equity-based compensation and are concentrated in riskier acquirers, in riskier acquisitions, and in acquirers whose CEOs have low exposure to the stock price. We find little support for traditional agency cost explanations of changes in CEO pay following acquisitions. However, our findings are broadly consistent with compensation changes representing a contracting solution to a two-sided adverse selection problem that is present only in stock acquisitions.
A low-profile dual-circularly polarized (CP) antenna array using spiral sequential rotation (SSR) technique is proposed. The array element consists of two stacked CP patches and a double-layer ceramic substrate with high dielectric constant. Dual CP radiations are accomplished by the slender rectangular structures on the radiators, which can excite two orthogonal characteristic modes. An extremely small size of 0.005λ3 (λ is the wavelength in free space for the low bands) and a wide 3-dB axial ratio beamwidth (ARBW) of 206° are achieved. Furthermore, the SSR technique is employed to achieve low cross-polarization level (XPL) within a large scanning angle. Prototype of a 6 × 6 array was fabricated and measured. Experimental results demonstrate that a wide 3-dB AR scanning angle of ± 55° is realized for LHCP as well as RHCP radiation. Additionally, low XPL less than −18.1 dB with gain fluctuation less than 4 dB are achieved over −55° ∼ + 55°. Meanwhile, the array has successfully passed the mechanical test and the thermal vacuum test (−90° ∼ + 90°). All the merits of dual-CP radiation, extremely low profile of 0.06λ, wide 3-dB AR scanning capability, and low XPL make our proposed dual-CP SSR antenna array be attractive candidate for satellite applications.
Industrial-organizational (I-O) psychology has largely ignored organized labor, both in terms of our research interests and as a potential domain of professional practice. Historically, some I-O psychologists have even engaged in antilabor activities. This article aims to make that history more salient to current members of the profession, help us better understand how and why that schism came about, note the adverse effects on our understanding of organizations and contributing to employee well-being and organizational effectiveness, and highlight associated ethical issues. We offer suggestions on how to address the situation, drawing on examples from the field of industrial relations. We also consider the impact of the current antilabor, antidemocratic US government administration. We conclude by offering some suggested prompts for commentaries to the article.
Let ${\mathbb {F}_q}$ be the finite field with $q = p^f$ elements. We study the restriction of two classes of mod p representations of ${G_q} = \text {GL}_2({{\mathbb {F}_q}})$ to ${G_p} = \text {GL}_2({\mathbb {F}_p})$. We first study the restrictions of principal series which are obtained by induction from a Borel subgroup ${B_q}$. We then analyze the restrictions of inductions from an anisotropic torus ${T_q}$ which are related to cuspidal representations. Complete decompositions are given in both cases according to the parity of f. The proofs depend on writing down explicit orbit decompositions of ${G_p} \backslash {G_q} / H,$ where $H = {B_q}$ or ${T_q}$ using the fact that ${G_q}/H$ is an explicit orbit in a certain projective line, along with Mackey theory.