Conceptual Construction of Fields Through Tactile Interface     

Miriam Reiner 《Interactive Learning Environments》2013,21(1):31-55

This paper examines the role of tactile perception in conceptual construction of forces and fields. The learning environment includes a simulation of a force field. The force applied by the field on an object is transferred to the learner's hand through a tactile interface designed as a trackball. The learner experiences varying resistance from the trackball when moving an object on the screen. The forces are actually “felt”, exerted on the screen-object as if the learner's hand is immersed in the “field.” We hypothesize that a tactile interface acts as an agent aimed at recruiting the body non-propositional knowledge, for construction of formal physics knowledge on fields of forces. Twelve subjects were asked to explore the structure of several invisible fields through tactile interface, then to design a series of situations that generate current and that energetically trap a particle in a particular area. The results of the study show that s tudents with no background in physics constructed a graphical representation of a field force of a single and double center of forces similar to the formal physics representation, though they had no conceptual background (i.e., vectors, field lines). Based on the tactile information, they constructed a representation of force as a vector, of force lines, equal-force lines (potential lines for particular cases), potential well (“trap”) and motion of a charged particle in a field of forces. We show that computer tactile interface acts as a trigger for access to non-propositional knowledge employed in everyday bodily activity, but not in formal learning. The computer environment turns into a virtual environment, carrying the features of perception within “reality”, providing opportunities for conceptual construction.  相似文献   

Embracing New Policies,Technologies, and Community Partnerships: A Case Study of the City of Houston's Bureau of Air Quality Control     

Miriam F. Williams PhD  Daisy D. James MS 《Technical Communication Quarterly》2013,22(1):82-98

As the City of Houston's Bureau of Air Quality Control embraced new policies, technologies, and rhetorical strategies, they simultaneously moved through Lukensmeyer and Torres's “four levels of public involvement,” which include the information, consultation, engagement, and collaboration levels (Lukensmeyer & Torres, 2006 Lukensmeyer, C. J., & Torres, L. H. (2006). Public deliberation: A manager's guide to citizen engagement. IBM Center for the Business of Government Collaboration Series. Retrieved November 2007 from http://www.businessofgovernment.org/pdfs/LukensmeyerReport.pdf  [Google Scholar]). Because of the technical and scientific nature of air quality inspections, increasing public involvement, especially the involvement of those in a predominantly African American and a predominantly Hispanic neighborhood, has been a challenge. This article describes the Bureau's journey through the information level, where the Bureau opens public access and participation in the investigation and reporting process; the consultation level, where Bureau staff go door-to-door in poor and minority neighborhoods collecting citizen feedback regarding perceived environmental hazards; the engagement level, where the Bureau conducts monthly environmental meetings with neighborhood residents; and the collaboration level, where citizens are taught to collect evidence of environmental violations.  相似文献   

Interlibrary Loan—Reference Collaboration: Filling Hard-to-Find Faculty Requests     

Margaret H. Bean  Miriam Rigby 《Journal of Interlibrary Loan, Document Delivery & Electronic Reserve》2013,23(1-2):1-7

We have implemented a successful in-house outsourcing program between University of Oregon Library departments. Collaboration between interlibrary loan staff and subject specialists appropriates ILLiad e-mail routing capabilities to enable subject specialists to join the workflow in processing difficult ILL requests. The goals of the program are to fill more requests, fill requests more quickly, give subject specialists the opportunity to learn more about their faculty members’ research needs, and to create a stepping stone to a purchase-on-demand program.  相似文献   

SCIENCE AND TECHNOLOGY RESOURCES. Bobick,James E., and Berard,G. Lynn.     

Miriam M. Carruthers 《Medical reference services quarterly》2013,32(3):348-350

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A study of emotional labor in librarianship     

Miriam L. Matteson  Shelly S. Miller 《Library & information science research》2013

Librarianship, like many occupations, requires emotional labor, which is an awareness of job requirements for emotional expression and the strategies used to express those emotions. Research on emotional labor suggests that performing emotional labor results in both positive and negative effects on individual outcomes, such as job satisfaction and job burnout. Since affective events are prevalent in library work and evidence suggests positive outcomes from emotional labor can be fostered, the ways emotional labor is performed in libraries should be studied. This research explores the key components of emotional labor: perceptions of display rules and the emotion regulation strategies of surface and deep acting. Data were collected from a sample of American librarians in 46 states from public, academic, special, and K–12 libraries who completed a survey. Bi-variate and multi-variate correlations, as well as ANOVAs, were used to test relationships among emotional labor constructs, job satisfaction, and job burnout. Results show evidence of significant associations with emotional labor among library employees in both the perception of display rules, as well as in surface and deep acting. Perception of display rules showed mixed results with job burnout and job satisfaction. Surface acting was found to be associated consistently with job burnout and decreased job satisfaction, while deep acting strategies were less strongly associated with negative outcomes. Findings suggest that library managers should clearly communicate display rule expectations to employees and work to build staff support to help meet those expectations. Library employees should be aware of occasions when they use surface acting and work to develop stronger deep acting techniques. The study contributes to an understanding of the influence of emotion management in the library workplace.  相似文献   

Deleterious effects of obesity on physical fitness in pre-pubertal children     

Arianna Ceschia  Stefano Giacomini  Simone Santarossa  Miriam Rugo  Desy Salvadego  Alessandro Da Ponte 《European Journal of Sport Science》2016,16(2):271-278

The prevalence of obesity in children has increased dramatically during the past decades in Europe and understanding physical fitness and its components in children is critical to design and implement effective interventions. The objective of the present study was to analyse the association between physical fitness (aerobic, speed, agility, power, flexibility and balance) and body mass index (BMI) in pre-pubertal children. A total of 2411 healthy schoolchildren (7–11 years) participated in this study. Anthropometric characteristics and body composition were assessed by skinfold thickness. Physical fitness was measured by nine physical fitness tests: endurance running, 20 m running speed, agility, handgrip strength, standing long jump and squat jump, sit and reach, medicine ball forward throw and static balance. No relevant differences were observed between boys and girls regarding anthropometric characteristics, body composition and physical fitness. However, overweight and obese children showed significantly lower physical fitness levels in endurance running, speed and agility (mean: +18.8, +5.5 and +14.5% of time to complete tasks, respectively), lower limb power normalised to body mass (?23.3%) and balance tests (number of falls: +165.5%) than their normal weight counterparts. On the other hand, obesity did not affect handgrip, throwing and flexibility. In conclusion, increased BMI was associated with lower performance capabilities limiting proper motor skill development, which directly affects the ability of children to take on sports skills. Actions undertaken to promote children's wellness and fitness should be prioritised and introduced early in life with the aim of enhancing physical fitness as well as preventing overweight and obesity.  相似文献   

Equity and the AVC pilots in Queensland: A study in policy refraction     

Miriam Henry  Sandra Taylor 《The Australian Educational Researcher》1995,22(1):85-106

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Preschool Teachers’ Implementation of Vocabulary Strategies During Shared Reading: a Comparative Study     

Miriam Lipsky  Andrea Adelman 《Early education and development》2016,27(7):957-975

Research Findings: Shared reading is reported to be the single best instructional practice for emergent literacy skills. Vocabulary instruction practices implemented during shared reading by both Head Start (HS) teachers and teachers from more affluent private school settings were compared to determine whether there were differences between the 2 groups of teachers in their implementation of research-based practices. HS teachers implemented vocabulary instruction practices during shared reading more often, and chose different words to instruct, than private school teachers. Whereas 78% of HS teachers provided some vocabulary instruction during shared reading, only 59% of private school teachers did so. Among those teachers who provided vocabulary instruction during shared reading, HS teachers used significantly more contextualization strategies for word instruction than private school teachers. These findings suggest that preschool teachers who work with children from high-needs backgrounds use vocabulary instruction during shared reading as a way to bolster children’s vocabularies more frequently than teachers working in private preschools that serve children from more privileged backgrounds. Extratextual language was also compared, and private school teachers had a higher mean length of utterance and type–token ratio than the HS teachers. Practice or Policy: Professional development is recommended for preschool teachers to increase the implementation of best practices for vocabulary instruction during shared reading.  相似文献   

How is the body’s systemic nature manifested amongst high school biology students?     

Jaklin Tripto  Orit Ben Zvi Assaraf  Zohar Snapir  Miriam Amit 《Instructional Science》2017,45(1):73-98

This study follows two groups of students (67 in all) through the 3 years of their high school biology education and examines the development of their systems thinking - specifically their models of the human body as a system. Both groups were composed of biology majors, but the students in one group also participated in a PBLbased extension program called “Medical Systems”. Data was gathered by means of concept maps, which the students completed at four strategic stages of the learning process: beginning of 10th grade, end of 10th grade, end of 11th grade and end of 12th grade. At the end of the 3 year learning process, the students’ showed more complex system models. They included a wider range of concepts in their maps, spanning hierarchy levels ranging from the molecular and cellular to the system level. We also found an increase in references to dynamic interactions, but this did not encourage the students to use cellular level processes when explaining phenomena that occur at the systems level. The impact of the PBL teaching method was strongly evident in the complexity of the Medical Systems program students’ concept maps, which heavily emphasized “hierarchy” and “diseases” as system characteristics.  相似文献   

A Balancing Act: Developing a Discourse Community in a Mathematics Classroom   总被引：2，自引：0，他引：2  

Miriam Gamoran Sherin 《Journal of Mathematics Teacher Education》2002,5(3):205-233

This article examines the pedagogical tensions involved in trying to usestudents' ideas as the basis for class discussion while also ensuring thatdiscussion is productive mathematically. The data for this study of theteaching of one middle-school teacher come from observations andvideotapes of instruction across a school year as well as interviews with theparticipating teacher. Specifically, the article describes the teacher'sattempts to support a student-centered process of mathematicaldiscourse and, at the same time, facilitate discussions of significantmathematical content. This tension in teaching was not easily resolved;throughout the school year the teacher shifted his emphasis betweenmaintaining the process and the content of the classroom discourse.Nevertheless, at times, the teacher balanced these competing goals by usinga ``filtering approach' to classroom discourse. First multiple ideas aresolicited from students to facilitate the process of student-centeredmathematical discourse. Students are encouraged to elaborate theirthinking, and to compare and evaluate their ideas with those that havealready been suggested. Then, to bring the content to the fore, the teacherfilters the ideas, focusing students' attention on a subset of themathematical ideas that have been raised. Finally, the teacher encouragesstudent-centered discourse about these ideas, thus maintaining a balancebetween process and content.  相似文献