Pre-race blood lactate levels and performance in middle distance runners

This study examined the effects of pre-race blood lactate levels on the performance of middle distance runners. [This is an excerpt from the abstract. For the complete abstract, please see the document.

Activation of myocardial cAMP-dependent protein kinase by lysoplasmenylcholine

AbstractPlasmalogen-specific, calcium-independent phospholipase A2 (iPLA2) is activated during myocardial ischemia. Accordingly, we have assessed the activation of myocardial protein kinases by the iPLA2 product, lysoplasmenylcholine. Lysoplasmenylcholine-activated protein kinase activity from heart cytosol fractionated on a DE-52 column was identified as cAMP-dependent protein kinase (PKA) based on the following: (1) protein kinase activity stimulated by cAMP and lysoplasmenylcholine co-eluted on sequential chromatographic steps; (2) lysoplasmenylcholine-activated protein kinase activity was inhibited by the PKA inhibitor, PKI; and (3) the unprimed PKA form generated from the primed form of PKA was activated by cAMP and lysoplasmenylcholine. These results demonstrate a novel mechanism for PKA activation by lysoplasmenylcholine

Deference, Denial, and Exclusion: Men Talk about Contraception and Unintended Pregnancy

Individual in-depth interviews were conducted with 20 men, ages 21-48, who have fathered at least one unintended pregnancy. The goal of the interviews was to explore the experiences of these men with unintended pregnancy, their communication with partners and others, contraceptive beliefs and practices, their relationships with their partners, and the outcomes and consequences of the unintended pregnancies. This essay describes results derived from their comments regarding their contraceptive practices and the pregnancy-outcome decisions, with thematic analysis used to identify prominent themes from participant comments. Two strong themes, deference and denial, and one lesser theme, exclusion, emerged from participant responses. Discussion of the role of communication, the power of denial, and opportunities for further involvement of men in decision making relating to unintended pregnancy are presented

Mapping Low-Density Intergalactic Gas: a Third Helium Lyman-alpha Forest

We present a new HST/STIS spectrum of the z=3.18 quasar PKS 1935-692 and summarize the spectral features shortwards of 304A in the rest frame likely to be caused by foreground HeII Lyman-alpha absorption. In accord with previous results on two other quasars at similar redshifts, we demonstrate a correlation with the HI Lyman-alpha forest absorption, and show that much of the helium absorption is caused by a comparable quantity of more diffuse gas with Omega~0.01, that is not detected in HI. The helium ionization zone around the quasar is detected as well as a void seen in both HI and HeII. The properties of the absorption are in broad agreement with those of the other quasars and with models of the protogalactic gas distribution and ionization at this redshift.Comment: 17 pages including 5 figures. As accepted for publication in The Astronomical Journal (minor revisions

Watershed Prioritization

The overall objective of this two-year study was to evaluate the water quality in the thirty-seven sub-basin watersheds in the Illinois River in Arkansas and to arrive at a watershed prioritization list to use in targeting non-point source activities. A water quality monitoring program was conducted with sampling in all thirty-seven sub-basins during both storm and base flow events and more intensive sampling in eight representative sub-basins during stOffil events. Each sub-basin was sampled seasonally during low flow (base-flow) conditions and during high flow storm (storm flow) conditions. In addition to the regular sampling, the intensive sub-basins were sampled approximately 20 additional times during high flow

Mapping the sensitivity of split ring resonators using a localized analyte

Split ring resonator (SRR) based metamaterials have frequently been demonstrated for use as optical sensors of organic materials. This is made possible by matching the wavelength of the SRR plasmonic resonance with a molecular resonance of a specific analyte, which is usually placed on top of the metal structure. However, systematic studies of SRRs that identify the regions that exhibit a high electric field strength are commonly performed using simulations. In this paper we demonstrate that areas of high electric field strength, termed “hot-spots,” can be found by localizing a small quantity of organic analyte at various positions on or near the structure. Furthermore, the sensitivity of the SRR to the localized analyte can be quantified to determine, experimentally, suitable regions for optical sensing

TASER International, Inc. - Grappling with growth: Working paper series--05-01

TASER International, Inc. is one of the world's leading less-lethal weapons manufacturers and distributors. The case begins with a dramatic moment, as the brothers who run the company become aware of a highly critical article in Barron's which questions the legitimacy of their high stock price and casts doubt on their continued ability to grow. The case presents the company's counterarguments to the critical Barron's article. (Note that both the Barron's article in its entirety and the response document from the company's website are included with the case as appendices.) Students are shown TASER's powerful and effective marketing strategy to police and military, and then asked to consider whether and how to approach the potentially huge, lucrative consumer market. The case resulted from lengthy in-person, email, and phone interviews with TASER's President, Tom Smith. In addition, the company and its products have been well publicized in the national business press and in the local newspapers. Further, product details and other information on TASERs and other less-lethal weapons have been published in numerous police and military sources. Finally, TASER International's website has been a rich source of supplemental information to support the writing of the case

Overview of Stirling Technology Research at NASA Glenn Research Center

Stirling Radioisotope Power Systems (RPS) are under development to provide power on future space science missions where robotic spacecraft will orbit, flyby, land or rove using less than a quarter of the plutonium the currently available RPS uses to produce about the same power. Glenn Research Center's (GRC's) newly formulated Stirling Cycle Technology Development Project (SCTDP) continues development of Stirling-based systems and subsystems, which include a flight-like generator and related housing assembly, controller, and convertors. The project also develops less mature technologies under Stirling Technology Research, with a focus on demonstration in representative environments to increase the technology readiness level (TRL). Matured technologies are evaluated for selection in future generator designs. Stirling Technology Research tasks focus on a wide variety of objectives, including increasing temperature capability to enable new environments, reducing generator mass and/or size, improving reliability or system fault tolerance, and developing alternative designs. The task objectives and status are summarized

Involving young people in the care and support of people living with HIV/AIDS in Zambia

The Population Council, in collaboration with CARE International and Family Health Trust, conducted a study in Zambia to determine which care and support needs of people living with HIV and AIDS and their families could be met by trained youth, and to establish whether youth engaged in formalized care and support activities would increase their adoption of protective behaviors or reduce the stigma faced by members of AIDS-affected households. Discussions with caregivers and clients demonstrated that trained youth are able to meet a range of the needs of clients and orphans and vulnerable children, and that their efforts may be laying the foundation for decreased isolation and stigmatization of AIDS-affected families. This study also demonstrated that NGOs and youth clubs working in relatively isolated rural and semi-urban areas can meet with positive and enthusiastic responses and high levels of participation. A particular focus of the continuing study is to further strengthen local partnerships and expand network linkages in order to promote community ownership and sustainability