Characterization of disturbance sources for LISA: torsion pendulum results

A torsion pendulum allows ground-based investigation of the purity of free-fall for the LISA test masses inside their capacitive position sensor. This paper presents recent improvements in our torsion pendulum facility that have both increased the pendulum sensitivity and allowed detailed characterization of several important sources of acceleration noise for the LISA test masses. We discuss here an improved upper limit on random force noise originating in the sensor. Additionally, we present new measurement techniques and preliminary results for characterizing the forces caused by the sensor's residual electrostatic fields, dielectric losses, residual spring-like coupling, and temperature gradients.Comment: 11 pages, 8 figures, accepted for publication Classical and Quantum Gravit

Model-Independent Sum Rule Analysis Based on Limited-Range Spectral Data

Partial sum rules are widely used in physics to separate low- and high-energy degrees of freedom of complex dynamical systems. Their application, though, is challenged in practice by the always finite spectrometer bandwidth and is often performed using risky model-dependent extrapolations. We show that, given spectra of the real and imaginary parts of any causal frequency-dependent response function (for example, optical conductivity, magnetic susceptibility, acoustical impedance etc.) in a limited range, the sum-rule integral from zero to a certain cutoff frequency inside this range can be safely derived using only the Kramers-Kronig dispersion relations without any extra model assumptions. This implies that experimental techniques providing both active and reactive response components independently, such as spectroscopic ellipsometry in optics, allow an extrapolation-independent determination of spectral weight 'hidden' below the lowest accessible frequency.Comment: 5 pages, 3 figure

Hungarian International Development Cooperation: Context, Stakeholders and Performance

This paper explores the domestic and international context of Hungary's emerging international development policy. Specifically, it looks at three factors that may influence how this policy operates: membership in the European Union (EU) and potential ‘Europeanization’, Hungary's wider foreign policy strategy, and the influence of domestic stakeholders. In order to uncover how these factors affect the country's international development policy, semi-structured interviews were carried out with the main stakeholders. The main conclusions are: (1) While accession to the EU did play a crucial role in restarting Hungary's international development policy, the integration has had little effect since then; (2) international development policy seems to serve mainly Hungary's regional strategic foreign policy and economic interests, and not its global development goals; and (3) although all the domestic development stakeholders are rather weak, the Ministry of Foreign Affairs (MFA) still seems to play a dominating role. Convergence with European requirements and best practices is, therefore, clearly hindered by foreign policy interests and also by the weakness of non- governmental stakeholders

Empowering Women in Underserved Communities: Using CBPR Approaches to Improve Health Literacy and Community Capacity

Moderator: Elena Carbone, DrPH RD, LDN, Associate Professor, Department of Nutrition, UMass Amherst Presenters: Jennifer Manganello, MPH, PhD Janine M. Jurkowski, MPH, PhD Elena T. Carbone, DrPH, RD, LDN Session Description Promoting health literacy empowers individuals and communities to better navigate the health care system and health information environment, and allows for informed decision making for choices and actions that affect health. Empowerment Theory and health literacy are inherent in Community-Based Participatory Research (CBPR) with low-income and disadvantaged populations. In order for representatives to be engaged as equal participants in the research process, research and health capacity building need to occur. This breakout session will be presented in three parts. The first presentation will provide an overview and introduce how Empowerment Theory and health literacy can be used to build the capacity of community representatives and patient stakeholders. The other two presentations will highlight CBPR research projects currently underway or planned. What is Health Literacy? Presenter: Jennifer Manganello Health literacy refers to a person’s ability to obtain and understand health information and navigate the health system, as well as the health care environment itself. Definitions of health literacy will be discussed, along with how health literacy is relevant at each of the levels of the socio-ecological model (i.e., individual vs. community). We will provide a brief overview about health literacy research conducted in community and clinical settings. This presentation will also discuss how health literacy is related to empowerment. Communities for Health Living (CHL): A CBPR Childhood Obesity Prevention Intervention Guided by Empowerment Theory Presenter: Janine M. Jurkowski CHL is an intervention research project that uses a parent-centered community-based participatory research (CBPR) in an RCT scale up of a childhood obesity prevention intervention guided by Empowerment Theory. CHL recognizes parents as family experts, engages them as co-researchers and embeds the resulting empowerment-focused intervention into Head Start, a national system of care reaching over one million low-income families. Building on a successful pilot assessment CHL researchers are collaborating with Boston/Somerville/Cambridge Head Start serving over 2000 children to expand the CBPR approach by engaging parents, community representatives and Head Start staff to adapt CHL to a new, more diverse setting. CHL is rigorously testing its efficacy to prevent obesity in children. To ensure the timely translation of this work this study is a practical behavioral trial that maintains a rigorous assessment of program efficacy. Primary innovations of this study are its explicit incorporation of Empowerment Theory into its participatory approach and intervention, which deviates from the traditional model of nutrition education to address broader family realities. Mpower: Empowering Mothers for Health Presenter: Elena T. Carbone This project responds to the WUN Shanghai Declaration and the United Nations General Assembly call to promote health literacy in parents and empower women as a global strategy to reduce non-communicable diseases (NCDs). Because many NCDs originate in early development and from health disparities, the maternal health literacy of women in poverty is especially vital. Maternal health literacy refers to the cognitive and social skills which determine the motivation and ability of mothers to gain access to, understand, and use information in ways that promote and maintain their health and that of their children. Despite its importance, preliminary results of two scoping reviews indicate that few studies have examined maternal health literacy; fewer still have focused on skill development or empowerment of women in poverty. This project is designed to develop a long-term and sustainable research plan to fill these gaps and is part of a five-stage approach to develop a universal research strategy to promote health literacy in parents and empower women globally. Moreover, this project introduces an innovative community-based participatory method to the field of health literacy; and focuses on critical health literacy skills, empowerment, and health literacy for health protection and promotion -- all of which have been largely ignored

Mammal population densities at a global scale are higher in human-modified areas

Global landscapes are changing due to human activities with consequences for both biodiversity and ecosystems. For single species, terrestrial mammal population densities have shown mixed responses to human pressure, with both increasing and decreasing densities reported in the literature. How the impacts of human activities on mammal populations translates into altered global density patterns remains unclear. Here we aim to disentangle the effect of human impacts on large-scale patterns of mammal population densities using a global dataset of 6729 population density estimates for 468 mammal species (representing 59% and 44% of mammalian orders and families). We fitted a mixed effect model to explain the variation in density based on a 1-degree resolution as a function of the human footprint index (HFI), a global proxy of direct and indirect human disturbances, while accounting for body mass, trophic level and primary productivity (normalized vegetation index; NDVI). We found a significant positive relationship between population density and HFI, where population densities were higher in areas with a higher HFI (e.g. agricultural or suburban areas – no populations were located in very high HFI urban areas) compared to areas with a low HFI (e.g. wilderness areas). We also tested the effect of the individual components of the HFI and still found a consistent positive effect. The relationships remained positive even across populations of the same species, although variability among species was high. Our results indicate shifts in mammal population densities in human modified landscapes, which is due to the combined effect of species filtering, increased resources and a possible reduction in competition and predation. Our study provides further evidence that macroecological patterns are being altered by human activities, where some species will benefit from these activities, while others will be negatively impacted or even extirpated

Principles and Implementation of an Ultrafast Transmission Electron Microscope

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 - August 2, 201

Continuous gravity measurementsr evealal ow-density lava lake at Kılauea Volcano, Hawai‘i

On 5 March 2011, the lava lake within the summit eruptive vent at Kīlauea Volcano, Hawai‘i, began to drain as magma withdrew to feed a dike intrusion and fissure eruption on the volcano’s east rift zone. The draining was monitored by a variety of continuous geological and geophysical measurements, including deformation, thermal and visual imagery, and gravity. Over the first ~14 hours of the draining, the ground near the eruptive vent subsided by about 0.15 m, gravity dropped by more than 100 μGal, and the lava lake retreated by over 120 m. We used GPS data to correct the gravity signal for the effects of subsurface mass loss and vertical deformation in order to isolate the change in gravity due to draining of the lava lake alone. Using a model of the eruptive vent geometry based on visual observations and the lava level over time determined from thermal camera data, we calculated the best fit lava density to the observed gravity decrease—to our knowledge, the first geophysical determination of the density of a lava lake anywhere in the world. Our result, 950 ± 300 kg m-3, suggests a lava density less than that of water and indicates that Kīlauea’s lava lake is gas-rich, which can explain why rockfalls that impact the lake trigger small explosions. Knowledge of such a fundamental material property as density is also critical to investigations of lava-lake convection and degassing and can inform calculations of pressure change in the subsurface magma plumbing system

The chromosphere: gateway to the corona, or the purgatory of solar physics?

I argue that one should attempt to understand the solar chromosphere not only for its own sake, but also if one is interested in the physics of: the corona; astrophysical dynamos; space weather; partially ionized plasmas; heliospheric UV radiation; the transition region. I outline curious observations which I personally find puzzling and deserving of attention.Comment: To appear in the proceedings of the 25th NSO Workshop "Chromospheric Structure and Dynamics. From Old Wisdom to New Insights", Memorie della Societa' Astronomica Italiana, Eds. Tritschler et a

Revealing kleptoparasitic and predatory tendencies in an African mammal community using camera traps: a comparison of spatiotemporal approaches

Camera trap data are increasingly being used to characterise relationships between the spatiotemporal activity patterns of sympatric mammal species, often with a view to inferring inter-specific interactions. In this context, we attempted to characterise the kleptoparasitic and predatory tendencies of spotted hyaenas Crocuta crocuta and lions Panthera leo from photographic data collected across 54 camera trap stations and two dry seasons in Tanzania's Ruaha National Park. We applied four different methods of quantifying spatiotemporal associations, including one strictly temporal approach (activity pattern overlap), one strictly spatial approach (co-occupancy modelling), and two spatiotemporal approaches (co-detection modelling and temporal spacing at shared camera trap sites). We expected a kleptoparasitic relationship between spotted hyaenas and lions to result in a positive spatiotemporal association, and further hypothesised that the association between lions and their favourite prey in Ruaha, the giraffe Giraffa camelopardalis and the zebra Equus quagga, would be stronger than those observed with non-preferred prey species (the impala Aepyceros melampus and the dikdik Madoqua kirkii). Only approaches incorporating both the temporal and spatial components of camera trap data resulted in significant associative patterns. The latter were particularly sensitive to the temporal resolution chosen to define species detections (i.e. occasion length), and only revealed a significant positive association between lion on spotted hyaena detections, as well as a tendency for both species to follow each other at camera trap sites, during the dry season of 2013, but not that of 2014. In both seasons, observed spatiotemporal associations between lions and each of the four herbivore species considered provided no convincing or consistent indications of any predatory preferences. Our study suggests that, when making inferences on inter-specific interactions from camera trap data, due regards should be given to the potential behavioural and methodological processes underlying observed spatiotemporal patterns