Optical and electronic properties of low-density InAs/InP quantum dot-like structures devoted to single-photon emitters at telecom wavelengths

Due to their band-structure and optical properties, InAs/InP quantum dots (QDs) constitute a promising system for single-photon generation at third telecom window of silica fibers and for applications in quantum communication networks. However, obtaining the necessary low in-plane density of emitters remains a challenge. Such structures are also still less explored than their InAs/GaAs counterparts regarding optical properties of confined carriers. Here, we report on the growth via metal-organic vapor phase epitaxy and investigation of low-density InAs/InP QD-like structures, emitting in the range of 1.2-1.7 ${\mu}$m, which includes the S, C, and L bands of the third optical window. We observe multiple photoluminescence (PL) peaks originating from flat QDs with height of small integer numbers of material monolayers. Temperature-dependent PL reveals redistribution of carriers between families of QDs. Via time-resolved PL, we obtain radiative lifetimes nearly independent of emission energy in contrast to previous reports on InAs/InP QDs, which we attribute to strongly height-dependent electron-hole correlations. Additionally, we observe neutral and charged exciton emission from spatially isolated emitters. Using the 8-band k${\cdot}$p model and configuration-interaction method, we successfully reproduce energies of emission lines, the dispersion of exciton lifetimes, carrier activation energies, as well as the biexciton binding energy, which allows for a detailed and comprehensive analysis of the underlying physics.Comment: 13 pages, 9 figure

Open Science principles for accelerating trait-based science across the Tree of Life

Synthesizing trait observations and knowledge across the Tree of Life remains a grand challenge for biodiversity science. Species traits are widely used in ecological and evolutionary science, and new data and methods have proliferated rapidly. Yet accessing and integrating disparate data sources remains a considerable challenge, slowing progress toward a global synthesis to integrate trait data across organisms. Trait science needs a vision for achieving global integration across all organisms. Here, we outline how the adoption of key Open Science principles-open data, open source and open methods-is transforming trait science, increasing transparency, democratizing access and accelerating global synthesis. To enhance widespread adoption of these principles, we introduce the Open Traits Network (OTN), a global, decentralized community welcoming all researchers and institutions pursuing the collaborative goal of standardizing and integrating trait data across organisms. We demonstrate how adherence to Open Science principles is key to the OTN community and outline five activities that can accelerate the synthesis of trait data across the Tree of Life, thereby facilitating rapid advances to address scientific inquiries and environmental issues. Lessons learned along the path to a global synthesis of trait data will provide a framework for addressing similarly complex data science and informatics challenges

Does bereavement support save lives?

This report aims to provide Cittimani Hospice Service with an overview of the findings and language texts derived from the study that provides feedback from the participants on the services provided by the Hospice and commentary on a range of service delivery issues.Associated Grant:Cittimani Hospice Service

Psycho-Social Update: A quarterly newsletter of IPP-SHR, Central Queensland University, Australia

‘Psycho-Social Update’ is a newsletter from the InternationalProgram of Psycho-Social Health Research IPP-SHR, Central Queensland University, circulated four times a year to an international audience of service providers, policy makers and academics with an interest in the human experience of serious illness.The aim of the newsletter is to translate the wealth of research findings available in the academic psycho-socialhealth literature into lay summaries that can be useful for service delivery and health policy. The newsletter also showcases the diversity of excellent psycho-social programinitiatives designed by practitioners and organisations to assist people to deal with the many challenges associated with serious physical and/ or mental illness. The newsletter celebrates the fact that psycho-social research is now a well established discipline that is ‘making a difference’ in the real world of health care. </div

Eight seasons : our family's journey with childhood leukaemia

"Tahlia is four when she is diagnosed with acute lymphoblastic leukaemia, a rapidly progressing form of childhood cancer. Her life is irrevocabley changed, and her family are confronted with the many difficult challenges associated with childhood leukaemia. This is a powerful and honest story, told through the eyes of a mother, about a little girl's strength and courage. This journey not only leaves the family with a new perspective of what life is about, but is an inspiration to all who come across it."--cove

Psychological and psychiatric sequelae of steroid use in hematology treatments : a review of the literature

There is considerable evidence that corticosteroid treatments are frequently associated with severe emotional and even psychiatric disturbances. Since their introduction as therapeutic agents, corticosteroids have been associated with symptoms ranging from mood disturbances to (florid) psychosis. In consideration of the centrality of steroid use in hematology, the expectation is that there should be extensive literature on the psychological and psychiatric interface with steroids in the treatment of these diagnostic groups. To date, however, although the emotional impact of corticosteroid use is reported in a wide range of diagnostic disorders there has been scant attention to this phenomenon in relation to treatment for hematological malignancies. The lack of research insights into this area has left a vacuum for clinical care and psychosocial support. More research needs to be done to address this imbalance, to achieve the optimum outcome for hematology patients and their families. This review provides a starting point by outlining the present literature on the psychological and psychiatric impact of steroid use

Surviving the crisis of relocation for specialist treatment in haematology : insights from New Zealand

Patients diagnosed with haematological malignancies require specialist treatments provided by major metropolitan hospitals. Those living outside the cities where the specialist care is located have to relocate for this specialist treatment. The findings presented in this article are from a program of research that documents the psychosocial impact of relocation on patients and their families. Prior Australian-based research conducted as part of the program indicates that the process of relocation exacerbates the stress of treatment and creates significant practical, emotional, social, and financial disruption to the families involved. The Australian findings provided the basis for a recent comparative study conducted by the program that explores the experience of relocation for haematology from the perspective of patients and their carers in New Zealand. The findings from the comparative study indicate that whilst there is evidence of similar psycho-social distress associatedwith relocation, there are a number of factors specific to living in New Zealand that ameliorate the impact, including smaller distances, strong community connections, and the participants’ personal determination to retain the focus on living