2,502 research outputs found
My Heart\u27s \u27Way Out In California: With My Girl Of The Golden West
https://digitalcommons.library.umaine.edu/mmb-vp/4422/thumbnail.jp
Stranded Assets: A Climate Risk Challenge, Executive Summary
Over the last few years, the topic of "stranded assets" resulting from environment-related risk factors has loomed larger. These factors include the effects of physical climate change as well as societal and regulatory responses to climate change. Despite the increasing prominence of these stranded assets as a topic of significant interest to academics, governments, financial institutions, and corporations, there has been little work specifically looking at this issue in Latin America and the Caribbean (LAC). This is a significant omission, given the region's exposure to environment-related risk factors, the presence of extensive fossil fuel resources that may become "unburnable" given carbon budget constraints, and the particular challenges and opportunities facing lower-income and emerging economies in LAC. This report includes an extensive literature review, reviews of case studies, in-depth interviews, extensive informal consultation, and a survey instrument to identify gaps in the stranded asset literature. The report builds on work undertaken in 2015 by the Inter-American Development Bank (IDB) on the issue of stranded assets. It aims to provide a deeper understanding of the issue and the existing literature about it, as well as highlight opportunities for future work, especially in LAC
Give Me The Right To Love You All The While
https://digitalcommons.library.umaine.edu/mmb-vp/3118/thumbnail.jp
Traditional and contemporary approaches to mathematical fitness-fatigue models in exercise science: a practical guide with resources. Part II.
The standard fitness-fatigue model (FFM) is known to include several limitations described by the linearity assumption, the independence assumption and the deterministic assumption. These limitations ensure that the modelled response to chronic training does not match the complexity observed in practice. The purpose of part II of this review series was to describe previous extensions to the standard FFM to address these limitations, providing key mathematical insights and resources, to both explain technical elements and enable researchers and practitioners to fit these extended models to their own data. To address the linearity assumption of the standard FFM and the associated limitation that doubling the training load predicts twice the performance improvement, two distinct extensions are reviewed including the addition of a non-linear transform to training inputs and inclusion of non-linear terms within the system of differential equations. To address the independence assumption where the response to a training session is unaffected by previous sessions, a popular extension where fatigue is updated as an exponentially weighted moving average of previous training loads is reviewed. Finally, the review introduces the concept of state-space models where uncertainty in the estimates of fitness, fatigue and performance measurement can be directly modelled eliminating the unsuited deterministic assumption of the standard FFM. The review also highlights how state-space models can be further expanded to include features such as the Kalman filter where parameter estimates can be updated with incoming performance measurements to better predict and manipulate training to optimise performance. Collectively, the range of topics covered in this review series and the resources provided should enable researchers and practitioners to better investigate the extensive area of FFMs and determine in what contexts models can assist with training monitoring and prescription
Observation of large many-body Coulomb interaction effects in a doped quantum wire
We demonstrate strong one dimensional (1-D) many-body interaction effects in
photoluminescence (PL) in a GaAs single quantum wire of unprecedented optical
quality, where 1-D electron plasma densities are controlled via electrical
gating. We observed PL of 1-D charged excitons with large binding energy of 2.3
meV relative to the neutral excitons, and its evolution to a Fermi-edge
singularity at high electron density. Furthermore, we find a strong band-gap
renormalization in the 1-D wire, or a large red-shift of PL with increased
electron plasma density. Such a large PL red-shift is not observed when we
create a high density neutral electron-hole plasma in the same wire, due
probably to cancellation of the Coulomb interaction energy in the neutral
plasma.Comment: 5 pages, 4 figures, RevTeX, to be published in Solid State
Communication
Graduate students navigating social-ecological research: insights from the Long-Term Ecological Research Network
Interdisciplinary, collaborative research capable of capturing the feedbacks between biophysical and social systems can improve the capacity for sustainable environmental decision making. Networks of researchers provide unique opportunities to foster social-ecological inquiry. Although insights into interdisciplinary research have been discussed elsewhere, they rarely address the role of networks and often come from the perspectives of more senior scientists. We have provided graduate student perspectives on interdisciplinary degree paths from within the Long-Term Ecological Research (LTER) Network. Focusing on data from a survey of graduate students in the LTER Network and four self-identified successful graduate student research experiences, we examined the importance of funding, pedagogy, research design and development, communication, networking, and culture and attitude to students pursuing social-ecological research. Through sharing insights from successful graduate student approaches to social-ecological research within the LTER Network, we hope to facilitate dialogue between students, faculty, and networks to improve training for interdisciplinary scientists
Graduate students navigating social-ecological research: insights from the Long-Term Ecological Research Network
Interdisciplinary, collaborative research capable of capturing the feedbacks between biophysical and social systems can improve the capacity for sustainable environmental decision making. Networks of researchers provide unique opportunities to foster social-ecological inquiry. Although insights into interdisciplinary research have been discussed elsewhere, they rarely address the role of networks and often come from the perspectives of more senior scientists. We have provided graduate student perspectives on interdisciplinary degree paths from within the Long-Term Ecological Research (LTER) Network. Focusing on data from a survey of graduate students in the LTER Network and four self-identified successful graduate student research experiences, we examined the importance of funding, pedagogy, research design and development, communication, networking, and culture and attitude to students pursuing social-ecological research. Through sharing insights from successful graduate student approaches to social-ecological research within the LTER Network, we hope to facilitate dialogue between students, faculty, and networks to improve training for interdisciplinary scientists
Development and validation of the caregiver-report version of the international depression questionnaire (IDQ-CG) and international anxiety questionnaire (IAQ-CG)
The International Depression Questionnaire (IDQ) and International Anxiety Questionnaire (IAQ) are self-report measures of ICD-11 single episode depressive disorder (DD) and generalised anxiety disorder (GAD). The present study sought to describe the development and psychometric evaluation of the caregiver-report versions of the IDQ and IAQ for children, referred to as the IDQ-CG and IAQ-CG, respectively. Participants were 639 parents living in Ukraine who provided data on themselves and one child in their household as part of "The Mental Health of Parents and Children in Ukraine Study: 2023 Follow-up" study. The latent structure of the IDQ-CG and IAQ-CG were tested using confirmatory factor analysis (CFA), composite reliability (CR) estimates were estimated, and convergent validity was assessed. Prevalence rates of probable ICD-11 DD and GAD were also estimated. CFA results indicated that the IDQ-CG and IAQ-CG were unidimensional, while the internal reliability of both scales was excellent. Convergent validity was established via associations with external measures of internalizing, externalizing, and attention problems as well as trauma exposure. Factors associated with increased IDQ-CG and IAQ-CG scores included pharmacological support for emotional or behavioural problems, delayed milestone development, being forced to move to another part of Ukraine, serious life disruption due to the war, and having experienced a bereavement. Of the total sample, 1.6% met diagnostic requirements for ICD-11 DD and 5.8% met diagnostic requirements for ICD-11 GAD. This study supports the psychometric properties of the IDQ-CG and IAQ-CG. These measures can be effectively used to identify young people in need of mental health support. [Abstract copyright: © 2024. The Author(s).
Gain in a quantum wire laser of high uniformity
A multi-quantum wire laser operating in the 1-D ground state has been
achieved in a very high uniformity structure that shows free exciton emission
with unprecedented narrow width and low lasing threshold. Under optical pumping
the spontaneous emission evolves from a sharp free exciton peak to a
red-shifted broad band. The lasing photon energy occurs about 5 meV below the
free exciton. The observed shift excludes free excitons in lasing and our
results show that Coulomb interactions in the 1-D electron-hole system shift
the spontaneous emission and play significant roles in laser gain.Comment: 4 pages, 4 figures, prepared by RevTe
Manifestation of Resonance-Related Chaos in Coupled Josephson Junctions
Chaotic features of systems of coupled Josephson junctions are studied.
Manifestation of chaos in the temporal dependence of the electric charge,
related to a parametric resonance, is demonstrated through the calculation of
the maximal Lyapunov exponent, phase-charge and charge-charge Lissajous
diagrams and correlation functions. The number of junctions in the stack
strongly influences the fine structure in the current voltage characteristics
and a strong proximity effect results from the nonperiodic boundary conditions.
The observed resonance-related chaos exhibits intermittency over a range of
conditions and parameters. General features of the system are analyzed by means
of a linearized equation and the criteria for a breakpoint region with no chaos
are obtained. Such criteria could clarify recent experimental observations of
variations in the power output from intrinsic Josephson junctions in high
temperature superconductors.Comment: 13 pages, 16 figure
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