Photometric determination of camera exposures for motion picture work

A photometric method for the determination of camera exposures in motion picture work is described. The relation of exposure, object brightness and lens stop number is derived, and the proportionality constant empirically determined for “Pan Astro” lenses of two- and three-inch focal length. A nomographic chart of the exposure relation is given to simplify the determination of the lens stop number to be used for a given object brightness.     

Using computer-based readers to improve reading comprehension of students with dyslexia

Twenty-eight middle school students, diagnosed as dyslexic and attending a school using the Slingerland approach to remediation of dyslexia, used a computer-based reading system for reading literature for about one-half hour a day for a semester. The system proved to be a strong compensatory aid, enabling 70 percent of the students to read with greater comprehension, approximately one grade level or more improvement, as measured by the Gray Oral Reading Test. For 40 percent of the students, the gains were large, from two to as much as five grade levels. However, not all students benefited. Fourteen percent showed lower comprehension scores when using the system, and there is some indication that this degradation is associated with kinesthetic-motor weakness. Some students reported gains in reading speed and exhibited increased span of attention for and endurance in reading when using the system. We did not find evidence that the computer-reader technology provided a positive remediation benefit incremental to that obtained from the school’s intensive Slingerland remediation program. Our results indicate that computer-readers are important compensatory aids that can enable many people with dyslexia to perform more effectively in reading-related tasks associated with school and work.     

Exploring clinician adoption of a novel evidence request feature in an electronic medical record system

Objective: The research evaluated strategies for facilitating physician adoption of an evidence-based medicine literature request feature recently integrated into an existing electronic medical record (EMR) system.Methods: This prospective study explored use of the service by 137 primary care physicians by using service usage statistics and focus group and survey components. The frequency of physicians'' requests for literature via the EMR during a 10-month period was examined to explore the impact of several enhanced communication strategies launched mid-way through the observation period. A focus group and a 25-item survey explored physicians'' experiences with the service.Results: There was no detectable difference in the proportion of physicians utilizing the service after implementation of the customized communication strategies (11% in each time period, P=1.0, McNemar''s test). Forty-eight physicians (35%) responded to the survey. Respondents who had used the service (n=19) indicated that information provided through the service was highly relevant to clinical practice (mean rating 4.6, scale 1 “not relevant”–5 “highly relevant”), and most (n=15) reported sharing the information with colleagues.Conclusion: The enhanced communication strategies, though well received, did not significantly affect use of the service. However, physicians noted the relevance and utility of librarian-summarized evidence from the literature, highlighting the potential benefits of providing expert librarian services in clinical workflow.

Highlights

• The communication strategies implemented during the study did not induce a noticeable increase in questions from physicians through the electronic medical record system.
• Surveyed physicians were generally satisfied with the evidence-based medicine literature request service and noted several resulting changes in clinical practice associated with librarian-provided evidence.
• Survey respondents viewed the monthly “evidence alert” newsletter, one of the communication strategies, as particularly effective, and it has become an integrated facet of the service.

Implications

• Librarians may contribute significantly to effective patient care by providing evidence to support the clinical decision-making process.
• The study''s findings emphasize the complexity of facilitating the adoption of services providing evidence for clinical practice.

     

Evolving data use policy in Trinidad and Tobago: the search for actionable knowledge on educational improvement in a small island developing state

This paper presents a single-country case study of the use of large scale assessment (LSA) data to generate actionable knowledge at school and system levels. Actionable knowledge is data-informed insight into school and system processes that can be used to direct corrective action. The analysis is framed from the perspective of the country’s evolving national policy on data use for educational improvement between 1990 and 2013. Trinidad and Tobago first participated in international large scale assessments (ILSAs) in 1991 but also developed a centralized system of national large scale assessments (NLSAs) in 2004. Analyses of both datasets consistently pointed to low quality and high inequality as the main actionable issues in the education system. NLSA data also hinted at notable variation in performance across schools and education districts. Analyses for and of policy point to the need for multiple school performance measures to better inform site-based, formative action. Over the period, actionable knowledge appears to have had greater impact at school level, with evidence being used by some low-performing schools to improve. However, at the system level, the frequent non-use and misuse of actionable knowledge suggest the need to promote and strengthen structures and processes related to evidence-informed policy-making.