A study of the correlation between reaction time, depth perception, visual span of apprehension, and a basketball skills test of high school male basketball players.

Thesis (Ed.M.)--Boston Universit

Evidence for facultative protocarnivory in Capsella bursa-pastoris seeds

Many plants derive nutrients by attracting, ensnaring and killing invertebrates, a process that is described as “protocarnivory”. This has been observed in seeds of the weed Capsella bursa-pastoris, but it is unclear as to whether it confers any material benefit in terms of germination, establishment and development. In the present study, seeds were germinated in zero, low, medium and high nutrient soils in both the presence and absence of nematodes (Steinernema feltiae). Nematodes were attracted to the seeds, with many dying within three days. Germination rates and seedling fresh masses were higher at all nutrient levels, and seedling fresh lengths were higher in all but the zero nutrient treatment, in the presence of nematodes. After transplantation, young plant fresh root lengths and dried leaf and root masses were generally higher in plants that had been germinated in the presence of nematodes across all nutrient levels, with the majority of significant differences being observed in the low-nutrient treatment. Our findings suggest that protocarnivory may play a role in the germination, establishment and early development of C. bursa-pastoris, and that this process may be facultative, since differences between nematode and non-nematode treatments were generally more pronounced in soils with low nutrient levels

A Guide to the Teaching of Negro Literature in High School

This paper will be a survey of the major American Negro writers from pre-Civil War days to the present time. Background information concerning each major period will be given, along with information about each author and comments about the selections which are appropriate for classroom discussion. Teachers will also be given suggestions for presenting the material to class, as well as suggested questions and assignments. In conclusion, it will be shown how the literature presented can be fused into the eleventh grade course of study for the Fort Worth Public Schools

Challenges with Sampling and Understanding Lead Corrosion Issues in Puerto Rico After Hurricane Maria

In January of 2018, an NSF RAPID project was launched to analyze the water quality in Puerto Rico after Hurricane Maria. More than 40 local drinking water taps were sampled over three sampling campaigns. This reconnaissance systematically included a collection of samples from publicly owned treatment systems (PRASA), privately owned systems operated by communities (non-PRASA), and unmonitored surface spring sources. The first sampling campaign was targeted towards gaining a holistic perspective of the water quality (e.g., bulk water quality parameters, nutrients, major ions, pathogens, DNA, disinfection byproducts (DBPs), and metals concentrations). However, elevated water lead levels in those initial results steered the following sampling events towards a more systematic lead sampling protocol, guided by the Environmental Protection Agency (EPA) Lead and Copper Rule (LCR) compliance procedure and alternative forensic lead sampling strategies. The results from the 2nd and 3rd sampling campaigns showed conflicting potable WLLs. Therefore, these data exemplify the challenges of rapid reconnaissance sampling when trying to implement a universal sampling approach for many different parameters. Furthermore, the variability of lead concentrations and the factors that affect corrosion contribute to this difficulty. This study compares aggressive water quality corrosion characteristics to the observed water quality in Puerto Rico distribution systems and presents the forensic fingerprints that may allow for the identification of lead sources. Overall, the results of this study illustrate the difficulty in characterizing the magnitude of corrosion issues in distribution systems. Many of systems sampled show that the water quality in Puerto Rico has aggressive water characteristics that can potentially produce elevated lead concentrations in potable water distribution systems, but sampling methods have a large impact on results and interpretation

Self-neglect: a case study and implications for clinical practice

Self-neglect is a worldwide and serious public health issue that can have serious adverse outcomes and is more common in older people. Cases can vary in presentation but typically present as poor self-care, poor care of the environment and service refusal. Community nurses frequently encounter self-neglect cases and health and social care professionals play a key role in the identification, management and prevention of self-neglect. Self-neglect cases can give rise to ethical, personal and professional challenges. The aim of this article is to create a greater understanding of the concept of self-neglect among community nurses

Visual Representations of Gender and Computing in Consumer and Professional Magazines

Studies in the nineteen-eighties showed that advertising images of computers were gendered, with women relatively less represented, and shown with less empowered roles, problems or presented as sexual objects. This paper uses a mix of content and interpretative analysis to analyse current imagery in consumerist and professional society publications. It reveals the present variation and complexity of the iconography of computers and people across different domains of representation, with the continuation of gender bias in subtle forms

Book Reviews

Securities Legislation By Louis Loss Boston: Little, Brown & Com-pany, 1951. Pp. xxvii, 1283. $17.50 reviewer: Hugh L. Sowards ================================ Private Property, the History of an Idea By Richard Schlatter New Brunswick: Rutgers University Press, 1951. Pp. 284.$2.50 reviewer: Stanley D. Rose ================================== Oil and Gas Law: Collection of articles TEXAS LAW REVIEW Austin: Texas Law Review, Inc., 1951. Pp. xix, 1736. $15.00 reviewer: William D. Warre