Type D Personality and Injury Relationship in Collegiate Track Athletes

The purpose of this study was to examine Type D personality as an internal factor for injury risk in collegiate track athletes. A survey was administered to 275 track athletes across each of the three NCAA divisions. The survey included general questions about injury history, which included demographic type questions. A Type D Personality Inventory assessment was administered which measured negative affectivity and social inhibition (Blum, 2009). Additionally, the survey included a version of the Perceived Stress Scale (PSS), measuring an athlete’s evaluation of situations that invokes a stress response (Cohen et al, 1983). Lastly, the survey included the Athletic Coping Skills Inventory (ACSI) ((Smith et al, 1994), which measures an athlete’s psychological skills. Skills measured in this section included; coping under adversity, coach ability, concentration, confidence, goal setting, peaking under pressure, and freedom from worry. Logistic Regression results revealed that Type D personality is a significant factor for predicting athletic injury in collegiate track athletes. However, a discriminate analysis with the two factors of Type D personality, negative affectivity and social inhibition, revealed that only negative affectivity significantly predicted injury. Coping skills and perceived stress both had significant impacts on negative affectivity. Due to social inhibitions insignificant effect on predicting injury, it was not further looked into. Findings from this study provide essential information to athletic programs, coaches and athletes aiming to reduce injury risk among collegiate track athletes

Nonlinear Wavepacket Dynamics in Proximity to a Stationary Inflection Point

A stationary inflection point (SIP) in the Bloch dispersion relation of a periodic waveguide is an exceptional point degeneracy where three Bloch eigenmodes coalesce forming the so-called frozen mode with a divergent amplitude and vanishing group velocity of its propagating component. We have developed a theoretical framework to study the time evolution of wavepackets centered at an SIP. Analysis of the evolution of statistical moments distribution of linear pulses shows a strong deviation from the conventional ballistic wavepacket dynamics in dispersive media. The presence of nonlinear interactions dramatically changes the situation, resulting in a mostly ballistic propagation of nonlinear wavepackets with the speed and even the direction of propagation essentially dependent on the wavepacket amplitude. Such a behavior is unique to nonlinear wavepackets centered at an SIP.Comment: 9 pages, 5 figure

Changing organisms in rapidly changing anthropogenic landscapes: the significance of the ‘Umwelt’-concept and functional habitat for animal conservation

There is a growing recognition for the significance of evolutionary thinking in ecology and conservation biology. However, ecology and conservation studies often work with species-specific, fixed traits that ignore intraspecific variation. The way the habitat of a species is considered is an example of typological thinking biased by human perception. Structural habitat units (e.g., land cover types) as perceived by humans may not represent functional habitat units for other organisms. Human activity may also interfere with the environmental information used by organisms. Therefore, the Umwelt-concept from ethology needs to be integrated in the way we think about habitat and habitat selection. It states that different organisms live in different perceptual worlds dealing with specific subsamples of the environment as a result of their evolutionary and developmental history. The resource-based habitat concept is a functional habitat model based on resource distributions (consumables and conditions) and individual movements. This behavioural approach takes into account aspects that relate to the perceptual world of organisms. This approach may offer new opportunities for conservation and may help avoid failures with habitat restoration. Perceptual ability may be subject to adaptive change, but it may also constrain organisms from showing adaptive behaviours in rapidly changing environments

Ballerina

https://scholarsmine.mst.edu/libcom_stuart_fall2016/1024/thumbnail.jp

Laboratory services series: a programmed maintenance system

The diverse facilities, operations and equipment at a major national research and development laboratory require a systematic, analytical approach to operating equipment maintenance. A computer-scheduled preventive maintenance program is described including program development, equipment identification, maintenance and inspection instructions, scheduling, personnel, and equipment history

Scaling theory of absorption in the frozen mode regime

A stationary inflection point (SIP) of the Bloch dispersion relation of a periodic system is a prominent example of an exceptional point degeneracy (EPD) where three Bloch eigenmodes coalesce. The scattering problem for a bounded photonic structure supporting a SIP features the frozen mode regime (FMR), where the incident wave is converted into the "frozen mode"with vanishing group velocity and diverging amplitude. We analyze the effect of losses and disorder on theFMRand develop a scaling formalism for the absorbance in the FMR that takes into consideration losses, disorder, and system size. The signatures of the EPD appear as an abrupt growth of absorbance for system sizes greater than a characteristic length that follows a parallel resistance law involving the absorption length and the Anderson localization length.Fil: Tuxbury, W.. Ohio Wesleyan University.; Estados UnidosFil: Fernández, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Modelado e Innovación Tecnológica. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Instituto de Modelado e Innovación Tecnológica; ArgentinaFil: Vitebskiy, I.. No especifíca;Fil: Kottos, Tsampikos. Ohio Wesleyan University.; Estados Unido