Climate-driven Shifts in Quantity and Seasonality of River Discharge over the past 1000 Years from the Hydrographic Apex of North America

Runoff generated from high elevations is the primary source of freshwater for western North America, yet this critical resource is managed on the basis of short instrumental records that capture an insufficient range of climatic conditions. Here we probe the effects of climate change over the past ~1000 years on river discharge in the upper Mackenzie River system based on paleoenvironmental information from the Peace-Athabasca Delta. The delta landscape responds to hydroclimatic changes with marked variability, while Lake Athabasca level appears to directly monitor overall water availability. The latter fluctuated systematically over the past millennium, with the highest levels occurring in concert with maximum glacier extent during the Little Ice Age, and the lowest during the 11th century, prior to medieval glacier expansion. Recent climate-driven hydrological change appears to be on a trajectory to even lower levels as high-elevation snow and glacier meltwater contributions both continue to decline

Report on opportunities and/or techniques for high-caliber experimental research (other) proposals for SSPEX

Brief discriptions of the following 13 experiments are included: ultrahigh vacuum petrology facility; artificial comet free flyer; artificial comet (tethered); cosmic dust detector; cosmic dust collector; dust collection using tethered satellites; artificial magnetosphere; microgravity petrological studies; slitless ultraviolet spectrometer; orbital determination and capture experiment (ODACE); high velocity sputtering of amorphous silicates; particle release experiments; and calibration of gamma and X-ray remote sensingprobes

Vocal tract resonances in singing: variation with laryngeal mechanism for male operatic singers in chest and falsetto registers

International audienceSeven male operatic singers sang the same notes and vowels in their chest and their falsetto registers, covering the overlap frequency range where two main laryngeal mechanisms can be identified by means of electroglottography: M1 in chest register and M2 in falsetto register. Glottal contact quotients determined using electroglottography were typically lower by 0.27 in M2 than in M1. Vocal tract resonance frequencies were measured by using broadband excitation at the lips and found to be typically lower in M2 than in M1 sung at the same pitch and vowel; R1 typically by 65 Hz and R2 by 90 Hz. These shifts in tract resonances were only weakly correlated with the changes in the contact quotient or laryngeal height that were measured simultaneously. There was considerable variability in the resonance tuning strategies used by the singers, and no evidence of a uniform systematic tuning strategy used by all singers. A simple model estimates that the shifts in resonance frequencies are consistent with the effective glottal area in falsetto register (M2) being 60%-70% of its value in chest register (M1)

“They had clothes on their back and they had food in their stomach, but they didn\u27t have me”: The contribution of parental mental health problems, substance use, and domestic violence and abuse on young people and parents

\ua9 2024 The AuthorsBackground: The parental risk factors of mental health problems, substance use, and domestic violence and abuse each individually negatively impacts children\u27s health and developmental outcomes. Few studies have considered the lived experience and support needs of parents and children in the real-world situation where these common risks cluster. Objective: This study explores parents\u27 and young people\u27s lived experiences of the clustering of parental mental health problems, parental substance use, and domestic violence and abuse. Methods: Semi-structured interviews were conducted with 18 mothers, 6 fathers, and 7 young people with experiences of these parental risk factors. Transcribed interviews were analysed using reflexive thematic analysis. Results: Four themes were developed, 1) cumulative adversity, 2) the impact of syndemic risk, 3) families navigating risk, and 4) family support. Parents and young people described family situations of stress wherein they experienced cumulative impact of multiple parental risk factors. Parents sought to navigate stressors and parent in positive ways under challenging conditions, often impeded by their own childhood trauma and diminished confidence. Parents and young people spoke of the need for, and benefits of having, support; both as a family and as individuals, to successfully address this trio of parental risks and the related impact. Conclusions: This study highlights the high level of stress families experience and the efforts they go to mitigate risk. Services and interventions need to reflect the complexity of multiple needs and consider both the whole family and individuals when providing support

Otal barley

Otal was developed from a bulk of >400 F10 single-plant selections from the cross Otra (from Finland) X Weibull 1514-64 (from Sweden). Otal is a six-rowed spring feed barley with medium sized, long, narrow grains; its straw is ~8 cm shorter than that of Bonanza and it matures 7 days earlier, in 82-83 days. Otal contains more protein than Johnston, Bonanza and Galt. Its yield was 85.8% than of Galt in Alberta trials (1979-81

Integrated health services for children: a qualitative study of family perspectives.

This is the final version. Available from BMC via the DOI in this record. BACKGROUND: There is increasing evidence that integrated care improves child related quality of life and reduces health service use. However, there is limited evidence on family perspectives about the quality of integrated care for children's services. This study aimed to understand children, young people, and caregivers' perceptions of a new integrated care service, and to identify essential components of integrated care for children and young people with ongoing conditions. METHODS: A qualitative analysis of in-depth interviews with caregivers and children included families (N = 37) with children with one of four ongoing conditions (asthma, eczema, epilepsy, constipation) who had experienced a new integrated care service delivered in South London, UK. RESULTS: Four key components of integrated services identified were: that the key health-worker understood the health needs of the family in context; that professionals involved children and caregivers in treatment; that holistic care that supported the family unit was provided; and that families experienced coordination across health, social, and education systems. CONCLUSIONS: Children and families identify care navigation and a holistic approach as key components that make high quality integrated care services. Service developments strengthening these aspects will align well with family perspectives on what works and what matters.Guy’s and St Thomas Charit

Lattice dynamics and correlated atomic motion from the atomic pair distribution function

The mean-square relative displacements (MSRD) of atomic pair motions in crystals are studied as a function of pair distance and temperature using the atomic pair distribution function (PDF). The effects of the lattice vibrations on the PDF peak widths are modelled using both a multi-parameter Born von-Karman (BvK) force model and a single-parameter Debye model. These results are compared to experimentally determined PDFs. We find that the near-neighbor atomic motions are strongly correlated, and that the extent of this correlation depends both on the interatomic interactions and crystal structure. These results suggest that proper account of the lattice vibrational effects on the PDF peak width is important in extracting information on static disorder in a disordered system such as an alloy. Good agreement is obtained between the BvK model calculations of PDF peak widths and the experimentally determined peak widths. The Debye model successfully explains the average, though not detailed, natures of the MSRD of atomic pair motion with just one parameter. Also the temperature dependence of the Debye model largely agrees with the BvK model predictions. Therefore, the Debye model provides a simple description of the effects of lattice vibrations on the PDF peak widths.Comment: 9 pages, 11 figure