1,375 research outputs found
Predicting the Future: Parental Progeny Investment in Response to Environmental Stress Cues
Environmental stressors can severely limit the ability of an organism to reproduce as lifespan is decreased and resources are shifted away from reproduction to survival. Although this is often detrimental to the organism’s reproductive fitness, certain other reproductive stress responses may mitigate this effect by increasing the likelihood of progeny survival in the F1 and subsequent generations. Here we review three means by which these progeny may be conferred a competitive edge as a result of stress encountered in the parental generation: heritable epigenetic modifications to nucleotides and histones, simple maternal investments of cytosolic components, and the partially overlapping phenomenon of terminal investment, which can entail extreme parental investment strategies in either cytosolic components or gamete production. We examine instances of these categories and their ability to subsequently impact offspring fitness and reproduction. Ultimately, without impacting nucleotide sequence, these more labile alterations may shape development, evolution, ecology and even human health, necessitating further understanding and research into the specific mechanisms by which environmental stressors are sensed and elicit a corresponding response in the parental germline
Openness, Growth, and Development: Evidence from a Panel of Developing Countries
This paper examines the interaction between openness, growth, and development using a panel of forty-seven developing countries and five-year averages for the period, 1965-1990. Its primary objective is to determine whether there is a direct link between the level of development and openness, while controlling for the indirect effect of openness through its impact on economic growth. Using a two-equation simultaneous-equations model of development and growth and three alternative measures of openness, our findings suggest that openness has a positive influence on both economic growth and human development. We also find that while economic growth makes a positive contribution to development, the converse is not true in that the more developed a nation the slower its growth rate
Long-term Recovery from Acute Cold Shock in Caenorhabditis Elegans
Background
Animals are exposed to a wide range of environmental stresses that can cause potentially fatal cellular damage. The ability to survive the period of stress as well as to repair any damage incurred is essential for fitness. Exposure to 2 °C for 24 h or longer is rapidly fatal to the nematode Caenorhabditis elegans, but the process of recovery from a shorter, initially non-lethal, cold shock is poorly understood.
Results We report that cold shock of less than 12-hour duration does not initially kill C. elegans, but these worms experience a progression of devastating phenotypes over the next 96 h that correlate with their eventual fate: successful recovery from the cold shock and survival, or failure to recover and death. Cold-shocked worms experience a marked loss of pigmentation, decrease in the size of their intestine and gonads, and disruption to the vulva. Those worms who will successfully recover from the cold shock regain their pigmentation and much of the integrity of their intestine and gonads. Those who will die do so with a distinct phenotype from worms dying during or immediately following cold shock, suggesting independent mechanisms. Worms lacking the G-protein coupled receptor FSHR-1 are resistant to acute death from longer cold shocks, and are more successful in their recovery from shorter sub-lethal cold shocks.
Conclusions We have defined two distinct phases of death associated with cold shock and described a progression of phenotypes that accompanies the course of recovery from that cold shock. The G-protein coupled receptor FSHR-1 antagonizes these novel processes of damage and recovery
Resilience and Coping for the Healthcare Community: A Post-disaster Group Work Intervention for Healthcare and Social Service Providers
Healthcare and social service providers play a critical role in supporting children, families and communities immediately after a disaster and throughout the recovery process. These providers, who may have also experienced the disaster and related losses, are among the least likely to receive mental health or psychological support which can result in burnout, secondary traumatic stress, depression and anxiety. Accessible psychosocial interventions designed for healthcare and social service providers in the aftermath of a disaster are therefore critical to recovery and to ensure providers are available to support families after future disasters. The purpose of this article is to describe Resilience and Coping for the Healthcare Community (RCHC), a manualized group work intervention for social service and health care providers who have provided care to children, families, and communities after a natural disaster. RCHC is currently being delivered in response to Hurricanes Harvey and Maria, storms that struck the gulf coast of the United States and the island of Puerto Rico in 2017. RCHC has also been used in the areas affected by Hurricane Sandy (New York and New Jersey), in Shreveport, Louisiana following severe flooding and in Saipan after a Typhoon devastated the island. Healthcare and social service providers who have received RCHC include the staff of Federally Qualified Health Centers and other community clinics, Disaster Case Managers, Child Care Providers, Mental Health Providers and First Responders. The health and wellbeing of these providers directly impacts their ability to provide quality care to families in their communities.
This article presents the theoretical foundations of the RCHC intervention, describes the intervention in detail, provides a description of early and ongoing evaluation studies, and discusses the conditions for both implementation of RCHC and training of RCHC providers. The RCHC psychoeducational intervention provides education on, and strategies for, acute, chronic and post-traumatic stress, coping, and resilience, tailored for the needs of the helping professions. Through the use of individual and collective processing, healthcare and social service providers participating in RCHC develop both individual and collective coping plans. Considering the short and long-term impacts of disasters on communities’ essential healthcare and social service workforce, interventions like RCHC stand to provide essential benefits, including retention and wellbeing of providers of family services
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The characteristics and motivations of online health information seekers : cross-sectional survey and qualitative interview study
Background: Most households in the United Kingdom have Internet access, and health-related Internet use is increasing. The National Health Service (NHS) Direct website is the major UK provider of online health information.
Objective: Our objective was to identify the characteristics and motivations of online health information seekers accessing the NHS Direct website, and to examine the benefits and challenges of the health Internet.
Methods: We undertook an online questionnaire survey, offered to users of the NHS Direct website. A subsample of survey respondents participated in in-depth, semistructured, qualitative interviews by telephone or instant messaging/email. Questionnaire results were analyzed using chi-square statistics. Thematic coding with constant comparison was used for interview transcript
analysis.
Results: In total 792 respondents completed some or all of the survey: 71.2% (534/750 with data available) were aged under 45 years, 67.4% (511/758) were female, and 37.7% (286/759) had university-level qualifications. They sought information for themselves (545/781, 69.8%), someone else (172/781, 22.0%), or both (64/781, 8.2%). Women were more likely than men to seek help for someone else or both themselves and someone else (168/509 vs 61/242, χ2 2 = 6.35, P = .04). Prior consultation with a health professional was reported by 44.9% (346/770), although this was less common in younger age groups (<36 years) (χ2 1
= 24.22, P < .001). Participants aged 16 to 75 years (n = 26, 20 female, 6 male) were recruited for interview by telephone (n = 23) and instant messaging/email (n = 3). Four major interview themes were identified: motivations for seeking help online; benefits of seeking help in this way and some of the challenges faced; strategies employed in navigating online health information
provision and determining what information to use and to trust; and specific comments regarding the NHS Direct website service.
Within the motivation category, four concepts emerged: the desire for reassurance; the desire for a second opinion to challenge other information; the desire for greater understanding to supplement other information; and perceived external barriers to accessing
information through traditional sources. The benefits clustered around three theme areas: convenience, coverage, and anonymity.
Various challenges were discussed but no prominent theme emerged. Navigating online health information and determining what to trust was regarded as a “common sense” activity, and brand recognition was important. Specific comments about NHS Direct included the perception that the online service was integrated with traditional service provision.
Conclusions: This study supports a model of evolutionary rather than revolutionary change in online health information use.
Given increasing resource constraints, the health care community needs to seek ways of promoting efficient and appropriate health service use, and should aim to harness the potential benefits of the Internet, informed by an understanding of how and why people go online for health
The Conserved G-Protein Coupled Receptor FSHR-1 Regulates Protective Host Responses to Infection and Oxidative Stress
The innate immune system’s ability to sense an infection is critical so that it can rapidly respond if pathogenic microorganisms threaten the host, but otherwise maintain a quiescent baseline state to avoid causing damage to the host or to commensal microorganisms. One important mechanism for discriminating between pathogenic and non-pathogenic bacteria is the recognition of cellular damage caused by a pathogen during the course of infection. InCaenorhabditis elegans, the conserved G-protein coupled receptor FSHR-1 is an important constituent of the innate immune response. FSHR-1 activates the expression of antimicrobial infection response genes in infected worms and delays accumulation of the ingested pathogenPseudomonas aeruginosa. FSHR-1 is central not only to the worm’s survival of infection by multiple pathogens, but also to the worm’s survival of xenobiotic cadmium and oxidative stresses. Infected worms produce reactive oxygen species to fight off the pathogens; FSHR-1 is required at the site of infection for the expression of detoxifying genes that protect the host from collateral damage caused by this defense response. Finally, the FSHR-1 pathway is important for the ability of worms to discriminate pathogenic from benign bacteria and subsequently initiate an aversive learning program that promotes selective pathogen avoidance
Searching for Sisterhood: Black Women, Race and the Georgia ERA
This Thesis is a local study employing new definitions of political activism and using oral histories, personal records and organizational archived material to debunk the myth that the feminist struggle surrounding the Equal Rights Amendment was separate from issues of race. Black women were involved in the fight for the ERA although not necessarily in the ways that White men and women might expect. Additionally, even when not obviously present, proponents and opponents of the ERA argued over the idea of Black women and race. Concern about Black women, overt racism and coded race language were all a part of the struggle by Georgia ERA Inc. advocates as well as Stop-ERA members. Race is intimately tied to the struggle for the ERA in Georgia
Guided Reading in the Elementary Classroom: Assessing Student Progress to Inform and Individualize Guided Reading Instruction
The purpose of this study is to determine what reading assessments teachers are using to inform their guided reading instruction. The ways that teachers use the data from the assessments in terms of guided reading instruction and grouping was also addressed. Finally, the frequency of the administration of assessments will also be a critical piece of this study
Uncovering past experiences that influence the pedagogical practices of early childhood teachers: an interpretive inquiry into play
While early childhood teachers and play scholars endorse the benefits of play to the learning and development of young children, the provision of play in early childhood education continues to be challenged. However, an investigation into the challenge does not surround finding who might not support the use and implementation of play or the solutions to the obstacles for play opportunities in early childhood education. Rather, an inquiry is necessary in order to answer the whys and hows of human opinion, behaviour and experience. The question is: Who are we and where do we come from as early childhood teachers?
Through interpretive inquiry into play, the intention of this study was to provide researchers and early childhood teachers with a possible example of how to engage in reflections, inquiring into the rich and diverse interplay of factors that impact the approaches to play as well as play practices in early childhood education. Visualised through spiral loops, each phase of the data collection and interpretation were informed by the proceeding stage as new questions emerged, new connections were made and developments in deepening understandings impacted the direction of research. The methodology incorporated interpretive and participative inquiry, with the researcher as a participant insider using an autoethnographic technique.
The inquiry into play reveals the previous experiences with play and its influences on the use of play as well as its impact on the current orientations and developed theories on play. Situated in an international school in Sri Lanka, the participants include three female veteran early childhood teachers who are Sri Lankan in nationality. The research emphasises play as a culturally embedded and institutionally defined concept, repositioning play from a previously Western point of view to a social construct. The inquiry into play further provokes thinking and conversations about play, illustrating its complexity and robustness
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