A Two Species Syn-Ecological Model with a Prey and a Predator Model with a Cover for Prey and an Alternative Food for the Predator

The present paper is devoted to an analytical study of two species syn-ecological model with a prey and a predator. Predator is provided with an alternative food and a partial cover is provided to prey to protect it from the attacks of the predator. All possible equilibrium points are identified and their local and global stability is carried out. Trajectories of both the populations are also carried out by using analytical techniques

Concentration Phenomena of a Semilinear Elliptic Equation with Large Advection in an Ecological Model

We consider a reaction-diffusion-advection equation arising from a biological model of migrating species. The qualitative properties of the globally attracting solution are studied and in some cases the limiting profile is determined. In particular, a conjecture of Cantrell, Cosner and Lou on concentration phenomena is resolved under mild conditions. Applications to a related parabolic competition system is also discussed

"You Know You Are Sick, Why Do You Carry A Pregnancy Again?" Applying the Socio-Ecological Model to Understand Barriers to PMTCT Service Utilization in Western Kenya.

ObjectiveThroughout most of sub-Saharan Africa (SSA), prevention of mother-to-child transmission (PMTCT) services are readily available. However, PMTCT programs in SSA have had suboptimal performance compared to other regions of the world. The main objective of this study is to explore the socio-ecological and individual factors influencing the utilization of PMTCT services among HIV-positive pregnant women in western Kenya using a social ecological model as our analytical lens.MethodsData were collected using in-depth interviews with 33 HIV-infected women attending government health facilities in rural western Kenya. Women with HIV-infected infants aged between 6 weeks to 6 months with a definitive diagnosis of HIV in the infant, as well as those with an HIV-negative test result in the infant were interviewed between November 2012 and June 2013. Coding and analysis of the transcripts followed grounded theory tenets. Coding reports were discussed in a series of meetings held among the authors. We then employed constant comparative analysis to discover dominant individual, family, society and structural determinants of PMTCT use.ResultsBarriers to women's utilization of PMTCT services fell within the broad constructs of the socio-ecological model of individual, family, society and structural determinants. Several themes cut across the different steps of PMTCT cascade and relate to different constructs of the socio-ecological model. These themes include: self-motivation, confidence and resilience, family support, absence or reduced stigma, right provider attitude and quality of health services provided. We also found out that these factors ensured enhanced maternal health and HIV negative children.ConclusionThe findings of this study suggest that a woman's social environment is an important determinant of MTCT. PMTCT Interventions must comprehensively address multiple factors across the different ecological levels. More research is however required for the development of multi-component interventions that combine strategies at different ecological levels

The importance of parents and teachers as stakeholders in school-based healthy eating programs

Schools have a crucial role for promoting and establishing healthy behaviors early in the life-course. In recent years, a substantial effort and resources have been invested in attempts to change the 'food culture' in schools in westernized societies. Large school-based programs which promote healthy eating often utilize an ecological model for instigating behavior change amongst school children. An ecological model is a set of comprehensive intervention strategies that target a multitude of factors which influence the eating practices of children in the school setting. The cultural issues that necessitate these healthy eating programs mean that interventions are not without challenges to their application and effectiveness particularly as they rely on collaboration between stakeholders: teachers, parents, public health practitioners, policy makers and more. The stakeholder input and relations are key parts of planning, implementing and evaluating complex health promotion and education programs in schools. This commentary will outline the importance of considering both teachers and parents as influencing agents or 'enablers' in the process of creating change in this context. Parental perceptions and teachers’ insights are critical for underpinning intervention feasibility, acceptability and performance. Their perceptions and understandings can provide ground-level and highly applicable expertise and importantly motivate children in the school environment. The philosophical principles behind parent and teacher integration into formal program evaluation are discussed, providing a theoretical basis for program evaluation. Recommendations are made for policy makers, researchers and professional evaluation experts’ to consider and integrate these stakeholders in future programs