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Objectives: Perfectionism is linked to nonsuicidal self-injury (NSSI). Individuals with elevated perfectionism tend to avoid undesirable emotions and experience lower self-esteem, which are associated with NSSI. However, it is unclear if these mechanisms explain the link between clinical perfectionism and NSSI, and if locus of control is involved. We aimed to explore whether experiential avoidance and self-esteem would mediate the relationship between clinical perfectionism and NSSI, and if locus of control would moderate links between clinical perfectionism and both experiential avoidance and self-esteem. Method: As part of a larger study, 514 Australian university students (Mage = 21.15 years, SD = 2.40; 73.5% female) completed an online survey of NSSI, clinical perfectionism, experiential avoidance, self-esteem, and locus of control. Results: Clinical perfectionism was associated with NSSI history, but not with recent NSSI or past year NSSI frequency. Lower self-esteem, but not experiential avoidance, mediated links between clinical perfectionism and NSSI history, recent NSSI, and NSSI frequency. More external locus of control was associated with NSSI, experiential avoidance, and lower self-esteem, but locus of control did not moderate pathways between clinical perfectionism and experiential avoidance or self-esteem. Conclusion: University students reporting elevated clinical perfectionism may have a tendency to experience lower self-esteem which is associated with NSSI history, recency, and severity.

Background: Contemporary models of non-suicidal self-injury (NSSI) suggest that emotional vulnerabilities, negative self-schemas, and beliefs about NSSI work together to differentiate students who self-injure from those who do not. However, it is unclear how these mechanisms are differentially related among students with and without a history of NSSI. Considering this, we used a network analysis approach to explore how students with and without a history of NSSI vary in processing their emotional experiences in relation to their self-concepts and beliefs about NSSI. Method: A sample of 480 university students (Mage = 21.18, SD = 2.43; 73.5 % female) completed self-report measures about their perceived emotional experiences (e.g., emotional reactivity, emotion regulation difficulties), self-concepts (e.g., self-esteem, self-efficacy), and NSSI. Results: A network comparison test revealed that students with a history of NSSI perceived themselves to have difficulties regulating particularly intense, unwanted negative emotions. In light of this, students with a history of NSSI expected some benefits of NSSI (e.g., emotion regulation) regardless of potential barriers (e.g., pain). Conversely, for students without a history of NSSI, expecting NSSI to have aversive outcomes was tied to expecting NSSI to have few benefits. Limitations: The cross-sectional design limits inferences to be made about the network structures. Conclusions: Students with and without a history of NSSI appear to differ in their cognitive processing of negative emotions and strategies used to deal with these emotions.

Artifacts with varying use-lives have different discard rates and hence are represented unequally among archaeological assemblages. As such, the ability to gauge the use-lives of artifacts is important for understanding the formation of archaeological assemblage variability. In lithic artifacts, use-life can be expressed as the extraction of utility, or work potential, from existing stone volume. Using experimental data and generalized linear modeling, this study develops models of artifact use-life on cores in the form of reduction intensity. We then apply these models to two archaeological case studies to (a) reconstruct the reduction intensities of archaeological cores and (b) investigate the survivorship curves of these archaeological cores across the reduction continuum using the Weibull function. Results indicate variation in core reduction and maintenance with respect to raw material properties and place use history and implicate evolutionary differences between Early Stone Age hominins and Holocene modern humans.

The fossil record provides tangible, historical evidence for the mode and operation of evolution across deep time. Striking patterns of convergence are some of the strongest examples of these operations, whereby, over time, similar environmental and/or behavioral pressures precipitate similarity in form and function between disparately related taxa. Here we present fossil evidence for an unexpected convergence between gregarious plant-eating mammals and dinosaurs. Recent excavations of Late Pleistocene deposits on Rusinga Island, Kenya, have uncovered a catastrophic assemblage of the wildebeest-like bovid Rusingoryx atopocranion. Previously known from fragmentary material, these new specimens reveal large, hollow, osseous nasal crests: a craniofacial novelty for mammals that is remarkably comparable to the nasal crests of lambeosaurine hadrosaur dinosaurs. Using adult and juvenile material from this assemblage, as well as computed tomographic imaging, we investigate this convergence from morphological, developmental, functional, and paleoenvironmental perspectives. Our detailed analyses reveal broad parallels between R. atopocranion and basal Lambeosaurinae, suggesting that osseous nasal crests may require a highly specific combination of ontogeny, evolution, and environmental pressures in order to develop.

The results of phase and amplitude measurements of individual dipoles in a 9-element (3 x 3 configuration) array are presented. The 3 x 3 array, designed for 450 to 800 MHz operation, consists of 9 open-sleeve dipoles. Using sweep frequency measurement techniques, the phase and amplitude characteristics of each individual dipoles. Using sweep frequency measurement techniques, the phase and amplitude characteristics of each individual dipole are compared to the center element for both vertical and horizontal polarizations. Keywords: Antenna Transfer Functions; Phase and Amplitude Measurements.

Imp. tomado del colofon, Front. con grab. calc.: Maria- Engraved on steel by J. Shury, Sign.: B-Q(12), R(2)