Ambient Air Toxic Releases and Adverse Pregnancy Outcomes in Allegheny County, Pennsylvania

Previous studies have shown that women exposed to certain air pollutants are at an increased risk for preterm delivery and/or delivering a low birth weight newborn. Preterm delivery and low birth weight are associated with an increased risk for morbidity and mortality. In an effort to better understand the impact of local environmental factors on pregnancy health, duration and outcomes, this study investigated the relationship of hazardous air pollutant chemicals released by local industries and the adverse pregnancy outcomes of preterm delivery and term low birth weight in Allegheny County, PA.This study included 2,798 singleton birth records for deliveries that occurred in Allegheny County in January through March of 2004. The Toxic Release Inventory provided data for 2003 fugitive and stack air releases of all facilities in Allegheny County reporting air releases of lead and toluene. This data was used for determining proxy maternal exposure measurements. ArcGIS software was used to calculate the distance from each maternal residence to each TRI facility. The distances and reported total pounds of release from each facility were then used to calculate a total lead and toluene exposure value for every birth record. Binary logistic regression was used to assess maternal characteristics' effects on birth outcomes. Chi square tests were used to assess maternal characteristics and levels of exposure to lead and toluene. Chi square tests and binary logistic regression were then used to assess pregnancy outcomes in relation to quartiles of exposure.This study found that mothers with certain age, race, education, and marital characteristics were significantly associated with lower exposure levels of lead and toluene. However, exposure to higher levels of lead or toluene, as measured in this study, was not significantly associated with an increased risk for preterm delivery or term low birth weight.Adverse pregnancy outcomes negatively impact an individual's immediate and lifelong health. Decreasing the incidence of preterm delivery and low birth weight are of great importance to public health. Research that helps to identify environmental determinants of adverse pregnancy outcomes is of vital public health significance

Intrinsic motivation as a core to educational achievement

Every child has the right to learn, but not every child has the opportunity to learn. It is my belief that the elements suggested in this paper promote intrinsic motivation within the classroom and can give all children an opportunity. By empowering children to enjoy the challenges of academic achievement they will be reaching their highest potential. In this paper I examine five main points: 1. The definition of intrinsic motivation 2. The compatibility of extrinsic rewards and intrinsic reactions in education 3. Teaching methods that induce intrinsic motivation 4. Evaluating core characteristics of those teaching methods 5. Multiculturalism and achievement motivation

Does the Sequence of Instruction Matter During Simulation?

Introduction: Instructional strategies must be balanced when subjecting students to full-immersion simulation so as not to discourage learning and increase cognitive overload. The purpose of this study was to determine if participating in a simulation exercise before lecture yielded better performance outcomes among novice learners. Methods: Twenty-nine participants were divided into 2 groups as follows: group 1 participated in simulation exercises followed by a didactic lecture and group 2 participated in the same learning activities presented in the opposite order. Participants were administered a multiple-choice cognitive assessment upon completion of a workshop. Results: Learners who participated in the simulated exercises followed by the didactic lecture performed better on post assessments as compared with those who participated in the simulation after the lecture. A repeated-measures or nested analysis of variance generated statistically significant results in terms of model fit F (α = 0.05; 4.54) = 176.07 with a P \u3c 0.0001. Despite their higher levels of increased performance, 76% of those who participated in simulation activities first indicated that they would have preferred to participate in a lecture first. Conclusions: The findings of this study suggest that differences occur among learners when the sequencing of instructional components is altered. Learners who participated in simulation before lecture demonstrated increased knowledge compared with learners who participated in simulation after a lecture

SH3PXD2A (SH3 and PX domains 2A)

The TKS5 protein, encoded by the gene SH3PXD2A, is a scaffolding protein essential for the formation of podosomes and invadopodia in untransformed cells and cancer cells, respectively. Podosomes and invadopodia (which collectively are termed invadosomes) are actin-rich cellular protrusions capable of secreting proteolytic enzymes that can degrade the extracellular matrix. These structures are thought to regulate cellular migration and invasion, as well as adhesion and the release of growth factors. In the context of cancer, TKS5-dependent invadopodia activity has been shown to play important roles in tumor growth and metastasis in various cancer types. Multiple isoforms of TKS5 exist due to alternative mRNA splicing and promoter usage

Mangrove system dynamics in Southeast Asia: linking livelihoods and ecosystem services in Vietnam

Across Southeast Asia, human activity has caused rapid mangrove system degradation and loss. In Vietnam, a country undergoing economic transition, mangrove systems are vital to the livelihoods of coastal rural communities. This paper studies three mangrove system-dependent communities on Vietnam’s northern coast. Guided by the sustainable livelihood framework, the paper adopts a mixed methods approach. It presents current uses of mangrove system goods and the factors shaping past livelihood responses to mangrove system change, using livelihood trajectory analysis. Findings demonstrate that communities depend on mangrove systems to different degrees for income, subsistence and to respond to change. However, the rapid development of aquaculture is associated with a significantly reduced and degraded mangrove system commons necessary to support the livelihoods of low-income households. Three distinct livelihood trajectories are identified: consolidator groups able to use their access to a wide range of resources, locked into resilient trajectories; accumulator groups able to use their access to limited resources to move from vulnerable to more resilient trajectories; and marginalised groups facing increasingly reduced access to resources locked into vulnerable trajectories. Vietnam faces challenges in reconciling a more market-orientated economy with the maintenance of mangrove system functions and processes that shape the vulnerability and resilience of livelihood trajectories. Policies and projects promoting the sustainable management of mangrove systems should acknowledge the substantial contribution and multiple uses of mangrove systems in livelihoods, particularly of the poor, and the impact of aquaculture on income equality and livelihood diversity that shapes household resilience and vulnerability

Social Workers in International Relief and Development: A Natural Fit

This study sought to examine the compatibility between social work competencies with humanitarian assistance job skills requirements in the market. A systematic analysis of international job descriptions (N=500) was conducted with a focus on the skills required of potential employees. The main themes identified and operationalized into discrete skills and/or behaviors were: technical expertise, intra- and extra-organizational competencies, personal abilities, sector specialization, education, and language requirements. To aid educators in curriculum building, the identified skills were cross-referenced with the Council on Social Work Education’s Education Policy and Accreditation Standards practice behaviors to determine how they translate into standardized competencies. The study offers important implications for social work education and discusses several venues for social work employment in international relief and development careers. [AUTHOR ABSTRACT

Generation of ultra-short light pulses by a rapidly ionizing thin foil

A thin and dense plasma layer is created when a sufficiently strong laser pulse impinges on a solid target. The nonlinearity introduced by the time-dependent electron density leads to the generation of harmonics. The pulse duration of the harmonic radiation is related to the risetime of the electron density and thus can be affected by the shape of the incident pulse and its peak field strength. Results are presented from numerical particle-in-cell-simulations of an intense laser pulse interacting with a thin foil target. An analytical model which shows how the harmonics are created is introduced. The proposed scheme might be a promising way towards the generation of attosecond pulses. PACS number(s): 52.40.Nk, 52.50.Jm, 52.65.RrComment: Second Revised Version, 13 pages (REVTeX), 3 figures in ps-format, submitted for publication to Physical Review E, WWW: http://www.physik.tu-darmstadt.de/tqe