4,444 research outputs found

    Metropolitan Contexts for Community Initiatives: Contrasts in a Turbulent Decade

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    Analyzes demographic, social, and poverty data and 2000-10 changes in the economies and housing markets of fourteen metropolitan areas to inform Casey's strategies for reinvesting in initiatives including rehabilitation and minimizing vacancies

    A comparison of the performance and scalability of relational and document-based web-systems for large scale applications in a rehabilitation context

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    Background: The Virtual Rehabilitation Environment (VRE) provides patients of long term neurological conditions with a platform to review their previous physiotherapy sessions, as well as see their goals and any treatments or exercises that their clinician has set for them to practice before their next session. Objective: The initial application implemented 21 of the 27 core features using the Microsoft ASP.NET MVC stack. However, the two core, non-functional requirements were negated from the project due to lack of experience and strict time constraints. This project aimed to investigate whether the application would be more suited to a non-relational solution. Method: The application was re-written using the MEAN stack (MongoDB, ExpressJS, AngularJS, NodeJS), an open source, fully JavaScript stack and then performance tests were carried out to compare the two applications. A scalability review was also conducted to assess the benefits and drawbacks of each technology in this aspect. Results: The investigation proved that the non-relational solution was much more efficient and performed faster. However, the choice of database was only a small part of the increase in efficiency and it was an all-round better design that gave the new application its performance upper hand. Conclusion: A proposal for a new application design is given that follows the microservice architecture used by companies such as Amazon and Netflix. The application is to be split up into four parts; database, client application, server application and content delivery network. These four, independently scalable and manageable services offer the greatest flexibility for future development at the low costs necessary for a start-up.Comment: Unpublished MSc thesi

    The Relationship Between Sibling and Peer Attachment Strength

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    Novel Rubidium Poly-Nitrogen Materials at High Pressure

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    First-principles crystal structure search is performed to predict novel rubidium poly-nitrogen materials at high pressure by varying the stoichiometry, i. e. relative quantities of the constituent rubidium and nitrogen atoms. Three compounds of high nitrogen content, RbN_{5}, RbN_{2}, and Rb_{4}N_{6}, are discovered. Rubidium pentazolate (RbN5) becomes thermodynamically stable at pressures above \unit[30]{GPa}. The charge transfer from Rb to N atoms enables aromaticity in cyclo-N_{^{_{5}}}^{-} while increasing the ionic bonding in the crystal. Rubidium pentazolate can be synthesized by compressing rubidium azide (RbN3) and nitrogen (N2) precursors above \unit[9.42]{GPa}, and its experimental discovery is aided by calculating the Raman spectrum and identifying the features attributed to N_{^{_{5}}}^{-} modes. The two other interesting compounds, RbN2 containing infinitely-long single-bonded nitrogen chains, and Rb_{4}N_{6} consisting of single-bonded N_{6} hexazine rings, become thermodynamically stable at pressures exceeding \unit[60]{GPa}. In addition to the compounds with high nitrogen content, Rb_{3}N_{3}, a new compound with 1:1 RbN stoichiometry containing bent N_{3} azides is found to exist at high pressures

    WATER QUALITY AND WATERBORNE DISEASE ALONG THE NIGER RIVER, MALI: A STUDY OF LOCAL KNOWLEDGE AND RESPONSE

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    This paper presents the findings of a study to assess patterns in local knowledge of and response to water quality and waterborne diseases in relation to seasonal changes in the Niger River Inland Delta. The study draws on field data collected in four villages along the Niger River in the Mopti district of Mali during September 2008. The major findings suggest: (1) water use behaviors and diarrheal disease management are influenced by the tremendous seasonal fluctuations in the riverine environment; (2) local awareness of the relationship between poor water quality, oral-fecal disease transmission, and waterborne disease is low; (3) interventions to mitigate the high incidence of childhood diarrhea and degraded water quality are limited by ongoing socio-economic, cultural, and institutional factors; and (4) women’s level of health knowledge is socially and culturally dependent

    Applying Duchscher\u27s Role Transition Theory to Reduce Novice Nurse Turnover

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    The identified gap in practice was teaching graduate nurses about the phases and barriers outlined in Duchscher’s role transition theory. The practice-focused question that guided the project addressed whether a staff education program applying Duchscher’s role transition theory would provide the needed knowledge in preparing the graduate nurse for transition to novice nurse. The project included identical pre- and post surveys and a staff education program. Twenty participants selected a Likert response to each of the four questions: I feel prepared for the transition from graduate nurse to novice nurse, I feel knowledgeable about the developmental barriers I can expect to navigate during my transition from graduate nurse to novice nurse, I understand the importance of maintaining a healthy self-care routine, and I feel comfortable asking for feedback. For each question, score range, improvement in response scores, score frequency, totals, standard deviation, and z scores were calculated. An overall increase in score total after the program was noted for each question. For the first question, the total increased from 70 to 81. For the second question, the total increased from 73 to 85. For the third question, the total increased from 89 to 95. For the fourth question, the total increased from 85 to 91. These results indicate that the education program was effective in helping graduate nurses feel more comfortable and knowledgeable about their transition to novice nurses
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