Radiation effects control: Eyes, skin

Adverse effects on the lens of the eye and the skin due to exposure to proton radiation during manned space flight were evaluated. Actual proton irradiation which might be encountered in space was simulated. Irradiation regimes included single acute exposures, daily fractionated exposures, and weekly fractionated exposures. Animals were exposed and then maintained and examined periodically until data sufficient to meet the objective were obtained. No significant skin effects were noted and no serious sight impairment was exhibited

Study of behavioral modifications resulting from exposure to high let radiation

Animal irradiations, behavioral studies, neurological studies, and nuclear medicine studies are discussed

Exploring the Role of Gender and Race in Salary Negotiations

Research findings from the negotiation literature have revealed significant differences in the negotiation behaviors of men and women, specifically that women do not negotiate as often or as successfully as men do. This difference has been cited as one of many factors contributing to the persistence of the gender wage gap. A possible explanation for the differences is that men and women are treated differently when they negotiate. Thus, there is evidence that women negotiators tend to receive multiple forms of social and economic punishment (i.e., backlash) for engaging in behavior that is inconsistent with stereotype-based expectations of women in the context of salary negotiations, including lower offers, decreased likeability and shareability, and declined requests for pay increases. These findings may partially explain the persistence of the gender and racial wage gaps today while also being indicative of unfair treatment that women receive in the workplace. While previous research has separately explored issues of gender and race in negotiation, few studies have examined the joint influence of these factors on negotiation outcomes. For this study, intersectionality and expectancy violation theory (EVT) served as the basis for the hypothesis that the backlash for initiating salary negotiations is greater for women of color than for white women. The results, however, did not support the hypothesis that gender and race interact in such a way that women of color experience disproportionate backlash. Nevertheless, the research presented here provides a paradigm for the future study of negotiation from the perspective of the joint effects of gender and race in the context of efforts to bridge the gender wage gap, improve negotiation outcomes for women and persons of color, and promote workplace equity

inTrack: High Precision Tracking of Mobile Sensor Nodes

Radio-interferometric ranging is a novel technique that allows for fine-grained node localization in networks of inexpensive COTS nodes. In this paper, we show that the approach can also be applied to precision tracking of mobile sensor nodes. We introduce inTrack, a cooperative tracking system based on radio-interferometry that features high accuracy, long range and low-power operation. The system utilizes a set of nodes placed at known locations to track a mobile sensor. We analyze how target speed and measurement errors affect the accuracy of the computed locations. To demonstrate the feasibility of our approach, we describe our prototype implementation using Berkeley motes. We evaluate the system using data from both simulations and field tests

IS AGRICULTURAL RESEARCH STILL A PUBLIC GOOD?

The nature of public agricultural research changed in 1980 when the Bayh-Dole Act allowed universities to retain title to inventions that were created with Federal funds, and the court case Diamond v. Chakrabarty allowed patenting of living tissue and eventually other bio-engineered products. In 1997, over 2,300 new licenses and options were executed on academic life-sciences property. This raises the questions agricultural research still be a public good? This paper is a critical first step in understanding how increasingly private ownership of intellectual property affects the agribusiness environment and the evolving role of public agricultural research institutions. The innovative step in this paper is the development of a formal economic model which represents the role of applied biotech research in the agricultural life sciences. The model is built around neo-Schumpeterian ideas of endogenous innovation and growth. The most salient implications for the role of the public sector are(1)The private sector underinvests in applied R&D activity. (2) Concentration in the large-firm, life-science R&D industry increases over time. (3) The life-science revolution is reducing the number of markets, in the short run. This reduction in the number of niche markets diminishes the role of the public sector. (4) There is a role for the public sector in conducting R&D in niche markets. (5) In the long run, the life-science revolution may also create new niche markets. (6) There is a role for the public sector in the provision of basic research which increases the productivity of applied R&D.Research and Development/Tech Change/Emerging Technologies,

How hummingbirds hum: acoustic holography of hummingbirds during maneuvering flight

Hummingbirds make a characteristic humming sound when they flaptheir wings. The physics and the biological significance of hummingbird aeroacoustics is still poorly understood. We used acoustic holography and high-speed cameras to determine the acoustic field of six hummingbirds while they either hovered stationary in front of a flower or maneuvered to track flower motion. We used a robotic flower that oscillated either laterally or longitudinally with a linear combination of 20 different frequencies between 0.2 and 20 Hz, a range that encompasses natural flower vibration frequencies in wind. We used high-speed marker tracking to dissect the transfer function between the moving flower, the head, and body of the bird. We also positioned four acoustic arrays equipped with 2176 microphones total above, below, and in front of the hummingbird. Acoustic data from the microphones were back-propagated to planes adjacent to the hummingbird to create the first real-time holograms of the pressure field a hummingbird generates in vivo. Integration of all this data offers insight into how hummingbirds modulate the acoustic field during hovering and maneuvering flight

funcX: A Federated Function Serving Fabric for Science

Exploding data volumes and velocities, new computational methods and platforms, and ubiquitous connectivity demand new approaches to computation in the sciences. These new approaches must enable computation to be mobile, so that, for example, it can occur near data, be triggered by events (e.g., arrival of new data), be offloaded to specialized accelerators, or run remotely where resources are available. They also require new design approaches in which monolithic applications can be decomposed into smaller components, that may in turn be executed separately and on the most suitable resources. To address these needs we present funcX---a distributed function as a service (FaaS) platform that enables flexible, scalable, and high performance remote function execution. funcX's endpoint software can transform existing clouds, clusters, and supercomputers into function serving systems, while funcX's cloud-hosted service provides transparent, secure, and reliable function execution across a federated ecosystem of endpoints. We motivate the need for funcX with several scientific case studies, present our prototype design and implementation, show optimizations that deliver throughput in excess of 1 million functions per second, and demonstrate, via experiments on two supercomputers, that funcX can scale to more than more than 130000 concurrent workers.Comment: Accepted to ACM Symposium on High-Performance Parallel and Distributed Computing (HPDC 2020). arXiv admin note: substantial text overlap with arXiv:1908.0490

Gender-Based Differences in Consumer E-Commerce Adoption

Among the many characteristics that impact the use of e-commerce, one that has received relatively little attention is gender. Extant evidence suggests that men and women differ in their beliefs regarding the use of information technology-related innovations, including e-commerce. However, less is known about how gender moderates the impact of various beliefs on behavioral intentions. In this study, we use a model derived from diffusion of innovations theory to examine gender differences in the degree to which various beliefs regarding e-commerce impact intentions to make purchases online. Results indicate that gender does moderate the influence of beliefs on use intentions in the context of consumer e-commerce. Specifically, our study finds that relative advantage is relatively more important for men and that compatibility is relatively more important for women. We explain why this may be true, discuss the implications of these findings and suggest several areas for future research