Heat treatment and hydration of calcium sulfate

Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1937.MIT copy bound with: Catalytic polymerization of ethylene with boron tri-chloride / by Karekin G. Arabian [1937] -- Chemical treatment of paper stock to promote water drainage / by Louis D. Bloom [1937] -- The rectification of boron trichloride solutions / by R.J. Brauer, D. Fulton [1937] -- Heat transfer coefficients in trombone coolers / by Raymond Dreselly and Rolf E. Schneider /[1937] -- A study of the corrosion of zinc / by James Marvin Ewell [1937]Includes bibliographical references (leaves 53-54).by Mortimer D. Abbott and Winthrop D. Comley.B.S

Aquatic macroinvertebrate responses to native and non-native predators

Non-native species can profoundly affect native ecosystems through trophic interactions with native species. Native prey may respond differently to non-native versus native predators since they lack prior experience. Here we investigate antipredator responses of two common freshwater macroinvertebrates, Gammarus pulex and Potamopyrgus jenkinsi, to olfactory cues from three predators; sympatric native fish (Gasterosteus aculeatus), sympatric native crayfish (Austropotamobius pallipes), and novel invasive crayfish (Pacifastacus leniusculus). G. pulex responded differently to fish and crayfish; showing enhanced locomotion in response to fish, but a preference for the dark over the light in response to the crayfish. P. jenkinsi showed increased vertical migration in response to all three predator cues relative to controls. These different responses to fish and crayfish are hypothesised to reflect the predators’ differing predation types; benthic for crayfish and pelagic for fish. However, we found no difference in response to native versus invasive crayfish, indicating that prey naiveté is unlikely to drive the impacts of invasive crayfish. The Predator Recognition Continuum Hypothesis proposes that benefits of generalisable predator recognition outweigh costs when predators are diverse. Generalised responses of prey as observed here will be adaptive in the presence of an invader, and may reduce novel predators’ potential impacts

Priorities for School Safety: The Alignment between Federal and State School Safety Legislation and Safety Needs as Perceived by Education Stakeholders in Florida Private Schools for Exceptional Students

This study investigates the apparent threat assessment priorities of potential risks to safety in the school environment in the United States and whether stakeholders in Florida private schools that serve exceptional students agree with the priority given to specific identified potential threats. Faculty and staff, high school students, and the students’ parents and guardians at four Florida private schools for exceptional students rated their perceptions of the severity and likelihood of occurrence of nine potential threats identified in a review of federal and Florida state school safety laws and national and state government surveys of incident occurrences. Results showed that although violent potential threats such as an armed intruder, students bringing weapons to school, and physical assaults received priority attention in federal and state school safety laws, stakeholders in Florida private schools for exceptional students indicated that threats of a more personal nature—such as bullying, sexual harassment, and cyberbullying—were the most significant risks to the safety of their school environment. All three respondent subgroups, however, reported high ratings of their overall feelings of safety at their schools

Comparison of manikin-based simulators and patient monitor simulators within paramedic education : the student perspective

Objective Investigate the impact to paramedic students of patient monitor simulators, when compared with manikin-based simulators within an educational programme. Design An exploratory study using an online questionnaire to gain qualitative and quantitative data. Setting One London university delivering a paramedic science programme. Participants A total of 136 paramedic students sponsored by a UK ambulance service were approached for this study. Data were received from 43 respondents (32%). Main outcome measures Comparison of simulators and their effect on student development through the identification of the student’s own perceived ability following use, perception of other’s ability (fellow students studying same course) following use and perception of the two pieces of simulation equipment available. Results The majority of respondents identified that simulation both increased their confidence and ability to demonstrate new knowledge and skills during simulation (97%) and further increased their ability to manage real patients (95%). Respondents agreed that there were advantages and disadvantages of using simulation, but these were not in line with those identified in previous studies. Instead of the human factors and non-technical skills outlined, students were much more practically focused on how the equipment performed. Conclusions This study suggests that there is a clear link between simulation and increased student confidence, but any issues encountered with the simulator equipment can reduce this benefit, causing the student’s learning environment to falter. Transitioning to monitor-based simulators is seen as a positive move, although the integration of manikins with this equipment is identified as being necessary. https://stel.bmj.com/content/4/2/65. This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/ DOI http://dx.doi.org/10.1136/bmjstel-2017-00025

Draft one, process

foreword of the Issue 1 of the DRAFT Magazin

The effects of river flooding on dioxin and PCBs in beef

In 2008-2010, samples of meat from 40 beef cattle, along with grass, soil and commercial feed, taken from ten matched pairs of flood-prone and control farms, were analysed for PCDD/Fs and PCBs. Concentrations were higher in soil and grass from flood-prone farms. The beef samples from flood-prone farms had total TEQ levels about 20% higher than on control farms. A majority of flood-prone farms (7/10) had higher median levels in beef than on the corresponding control farm. This first controlled investigation into PCDD/F and PCB contamination in beef produced on flood-prone land, presents robust evidence that flooding is a contaminant transfer mechanism to cattle raised on river catchments with a history of urbanisation and industrialisation. PCDD/F and PCB sources in these river systems are likely to be a result of the legacy of contamination from previous industrialisation, as well as more recent combustion activity or pollution events. Crow

The Hollybank Challenges: AT for People with Profound Disabilities

The use of Assistive Technology with people with profound and multiple disabilities is a specialised subfield. Drawing on its authors' experiences and observations at a UK charitable foundation that offers specialised educational, residential and therapeutic facilities, this paper describes the distinct challenges that present themselves when applying AT to address the needs of this often-overlooked sector of the community. It is hoped that this will help raise awareness and contribute to improving the overall quality of AT provision in this area

Seven exercises planned to stimulate the flow of ideas in creative composition

Thesis (Ed.M.)--Boston Universit