The Late Cenomanian Anoxic Event; implications for foraminiferal evolution

Merged with duplicate record 10026.1/739 on 27.02.2017 by CS (TIS)This study investigates the effect of the late Cenomanian Oceanic Anoxic Event (OAE) on the planktonic and benthonic foraminifera. On the former, the OAE was the cause of major extinctions within the population, the return to pre-OAE oxygen levels permitting recolonization of the vacated niches. On the latter, the OAE caused extinctions but resulted in a low oxygen tolerant fauna which slowly evolved into the vacated niches on the post-OAE recovery of oxygen levels. The changes in the foraminiferal populations have been integrated with changes in other marine organisms through the late Cenomanian

Student Wellness Needs in Rural Appalachia

The study reported here determined the youth risk behaviors of students in a rural high school. A 44-item questionnaire adapted from the Youth Risk Survey developed at the National Center for Chronic Disease Prevention was administered. Findings indicate that some issues of national concern were not confirmed in this West Virginia sample. Tobacco and steroid use were not significant issues in this study. The areas of suicide ideation and food choices, however, highlighted areas of concern. Implications for practice are proposed

Generating Readable RTL Using a Language Model

This disclosure describes the use of a language model to improve the readability of generated Register-Transfer Level (RTL) code. The language model is provided with a prompt that includes generated RTL and (optionally), the original hardware description. The model produces as output a readable version of the RTL. Prompts can be iterated upon automatically, e.g. if the code fails to pass a test (e.g., a lint test) or does not compile, or manually if the user prefers the output to be in a particular style. The readable RTL output by the language model can be subjected to a logic equivalence check (LEC) to confirm that the output readable RTL is equivalent to the input RTL to ensure that the behavior of the design is identical. Unlike a traditional code formatter, a language model can perform complex transformations and interpret the ideas in a block of code. A language model can also generate meaningful comments as part of the output

Denoising time-resolved microscopy image sequences with singular value thresholding.

Time-resolved imaging in microscopy is important for the direct observation of a range of dynamic processes in both the physical and life sciences. However, the image sequences are often corrupted by noise, either as a result of high frame rates or a need to limit the radiation dose received by the sample. Here we exploit both spatial and temporal correlations using low-rank matrix recovery methods to denoise microscopy image sequences. We also make use of an unbiased risk estimator to address the issue of how much thresholding to apply in a robust and automated manner. The performance of the technique is demonstrated using simulated image sequences, as well as experimental scanning transmission electron microscopy data, where surface adatom motion and nanoparticle structural dynamics are recovered at rates of up to 32 frames per second.Junior Research Fellowship from Clare CollegeThis is the final version of the article. It first appeared from Elsevier via http://dx.doi.org/10.1016/j.ultramic.2016.05.00

The difficulties associated with integrating computation into undergraduate physics

From a department being resistant to change to students not buying into the new computational activities, the challenges that are faced with integrating computation into the physics undergraduate curriculum are varied. The Partnership for Integration of Computation into Undergraduate Physics (PICUP) aims to expand the role of computation in the undergraduate physics curriculum. The research presented in this paper is part of a larger project examining the role of the PICUP workshop in facilitating both the integration of computation into classrooms and developing a supportive community to support this integration. An important part of providing the necessary supports for integration is understanding and categorizing the problems members of this community of integrators face when integrating computation in their courses. Through individual and group interviews, we discuss the barriers to integration that new and experienced community members of PICUP have experienced in the past or perceive could exist in the future.Comment: 4 page

Off-axis reflective optical apparatus

Embodiments of the present invention are directed to a simple apparatus and a convenient and accurate method of mounting the components to form an off-axis reflective optical apparatus such as a collimator. In one embodiment, an off-axis reflective optical apparatus comprises a mounting block having a ferrule holder support surface and an off-axis reflector support surface which is generally perpendicular to the ferrule holder support surface. An optical reflector is mounted on the off-axis reflector support surface and has a reflected beam centerline. The optical reflector has a conic reflective surface and a conic center. A ferrule holder is mounted on the ferrule holder support surface. The ferrule holder provides a ferrule for coupling to an optical fiber and orienting a fiber tip of the optical fiber along a fiber axis toward the optical reflector. The fiber axis is nonparallel to the reflected beam centerline. Prior to mounting the optical reflector to the off-axis reflector support surface and prior to mounting the ferrule holder to the ferrule holder support surface, the optical reflector is movable on the off-axis reflector surface and the ferrule holder is movable on the ferrule holder support surface to align the conic center of the optical reflector with respect to the fiber tip of the optical fiber, and the apparatus has at least one of the following features: (1) the optical reflector is movable on the off-axis reflector support surface to adjust a focus of the fiber tip with respect to the optical reflector, and (2) the ferrule holder is movable on the ferrule holder support surface to adjust the focus of the fiber tip with respect to the optical reflector

Core Losses in Co-Rich Inductors with Tunable Permeability

High frequency, low loss power systems enable electrified aircraft propulsion. Filter inductors that reduce noise in high current systems can account for 50% of the motor drive mass. Efficient inductor cores with tunable permeability reduce system mass by producing less heat, that removes heat sink mass. Requirements for filter inductors vary based on the chosen topology, but all inductor cores must operate below saturation levels. As the saturation flux density is limited (less than ~2 T), high differential current applications require cores with low relative permeabilities. The large induced anisotropies possible in Co-rich metal amorphous nanocomposite materials enables gapless inductors with relative permeabilities down to ~20. These materials have fine grain size ~8nm with a faulted, close packed structure. The impact of different processing methods on core losses are presented along with comparison to other low permeability soft magnetic materials

Values as Guiding Principles of Motivation: A Two Factor Model

Although people use stereotypes and prejudices to arrive at preferred conclusions, individual differences determine the extent and direction to which these intergroup attitudes color judgments. Research demonstrates that numerous personality variables act as predictors of the use of stereotypes and prejudice. Some attempts have been made to organize these measures into underlying values systems. I tested the hypotheses that values influence perceptions of ingroups and outgroups. In Study 1, participants completed individual difference measures. Factor analysis revealed two independent factors: Egalitarianism, which predicted positive judgments of outgroups, and Conservatism, which predicted positive judgments of ingroups. In Study 2, participants read a story describing either a gay or heterosexual man. I predicted that participants would vary their interpretation of the target based on their value orientations. Although Egalitarianism and Conservatism did not predict ratings of the target individual, they did predict free responses of the target, homophobia, and behaviors