Chemical sourcing of prehistoric ceramics from Mesoamerica

Abstract only availableFor over 3000 years the Basin of Mexico has been a cultural core of Mesoamerica—the location of Teotihuacán, the Aztec capital, and modern Mexico City. Despite the region's enduring prominence, little is known about early interactions between its different cultures. This project investigates ceramic exchange in the Basin of Mexico during the Formative Period (1200-500 BC) by chemically sourcing ceramics from four sites in the northeastern corridor, the Teotihuacán Valley. Instrument Neutron Activation Analysis (INAA) was used to determine the elemental compositions of 105 pottery sherds. The concentrations of 33 elements were detected and ceramics were grouped according to elemental compositions. When the differences between groups were greater than differences within groups, the pottery within a group was assumed to have the same provenance. Thus the study determined the proportion of locally made pottery and identified samples that appear to be imports.U.S. Dept. of Energy Innovations in Nuclear Infrastructure and Education Summer MURR Undergraduate Research Scholarshi

The Public’s Case Against DTE Energy: Extracting Profits, inducing health harms, and damaging democracy

Together with our partners, MEJC and LittleSis, We The People Michigan finds that DTE has extracted profit from its customers through hundreds of thousands of shutoffs, the second highest amount of rate hikes in the country, and unnecessary power outages that leave customers without power. They have invested heavily in new fossil fuel power plants that place significant health burdens on customers while blocking renewable energy initiatives. Finally, this report digs into the campaign donations of DTE executives, board members, and PAC to reveal how they utilize dark money to advance their profit-driven agenda

The importance of appropriate diagnostics in prosthetic joint infection:letter to the editor of BMC musculoskeletal disorders

Assessment of a new diagnostic test must be performed against an acceptable and validated standard to allow comparison with other studies. We are concerned that the adoption of lower diagnostic criteria in this paper has contributed to an over-diagnosis of prosthetic joint infection and makes interpretation of the results difficult

GRACE satellite monitoring of large depletion in water storage in response to the 2011 drought in Texas

International audienceTexas experienced the most extreme one-year drought on record in 2011 with precipitation at 40% of long-term mean and agricultural losses of ~$7.6 billion. We assess the value of Gravity Recovery and Climate Experiment (GRACE) satellite-derived total water storage (TWS) change as an alternative remote sensing-based drought indicator, independent of traditional drought indicators based on in situ monitoring. GRACE shows depletion in TWS of 62.3 ± 17.7 km3 during the 2011 drought. Large uncertainties in simulated soil moisture storage depletion (14-83 km3) from six land surface models indicate that GRACE TWS is a more reliable drought indicator than disaggregated soil moisture or groundwater storage. Groundwater use and groundwater level data indicate that depletion is dominated by changes in soil moisture storage, consistent with high correlation between GRACE TWS and the Palmer Drought Severity Index. GRACE provides a valuable tool for monitoring statewide water storage depletion, linking meteorological and hydrological droughts

The feasibility and effects of eye movement training for visual field loss after stroke: a mixed methods study

Acknowledgements The author(s) would like to thank the designers of all included scanning training tools for providing free access during this study. They wish to note that MyHappyNeuron is designed for a general population, and a version specifically for healthcare use (HappyNeuron Pro) is also available. We would also like to thank the low vision centres and rehabilitation officers involved in this study Funding This study was funded by the Stroke Association (UK) by way of a Junior Research and Training Fellowship held by the lead author (TSA JRTF 2011/02). MCB, AP and the NMAHP Research Unit are funded by the Scottish Government Health and Social Care Directorates. The views expressed here are those of the authors and not necessarily those of the funders.Peer reviewedPublisher PD

Finding qualitative research: an evaluation of search strategies

BACKGROUND: Qualitative research makes an important contribution to our understanding of health and healthcare. However, qualitative evidence can be difficult to search for and identify, and the effectiveness of different types of search strategies is unknown. METHODS: Three search strategies for qualitative research in the example area of support for breast-feeding were evaluated using six electronic bibliographic databases. The strategies were based on using thesaurus terms, free-text terms and broad-based terms. These strategies were combined with recognised search terms for support for breast-feeding previously used in a Cochrane review. For each strategy, we evaluated the recall (potentially relevant records found) and precision (actually relevant records found). RESULTS: A total yield of 7420 potentially relevant records was retrieved by the three strategies combined. Of these, 262 were judged relevant. Using one strategy alone would miss relevant records. The broad-based strategy had the highest recall and the thesaurus strategy the highest precision. Precision was generally poor: 96% of records initially identified as potentially relevant were deemed irrelevant. Searching for qualitative research involves trade-offs between recall and precision. CONCLUSIONS: These findings confirm that strategies that attempt to maximise the number of potentially relevant records found are likely to result in a large number of false positives. The findings also suggest that a range of search terms is required to optimise searching for qualitative evidence. This underlines the problems of current methods for indexing qualitative research in bibliographic databases and indicates where improvements need to be made

Baryon acoustic oscillations reconstruction using convolutional neural networks

We propose a new scheme to reconstruct the baryon acoustic oscillations (BAO) signal, which contains key cosmological information, based on deep convolutional neural networks (CNN). Trained with almost no fine tuning, the network can recover large-scale modes accurately in the test set: the correlation coefficient between the true and reconstructed initial conditions reaches 90% at k ≤ 0.2 hMpc−1, which can lead to significant improvements of the BAO signal-to-noise ratio down to k ≃ 0.4 hMpc−1. Since this new scheme is based on the configuration-space density field in sub-boxes, it is local and less affected by survey boundaries than the standard reconstruction method, as our tests confirm. We find that the network trained in one cosmology is able to reconstruct BAO peaks in the others, i.e. recovering information lost to non-linearity independent of cosmology. The accuracy of recovered BAO peak positions is far less than that caused by the difference in the cosmology models for training and testing, suggesting that different models can be distinguished efficiently in our scheme. It is very promising that Our scheme provides a different new way to extract the cosmological information from the ongoing and future large galaxy surveys