School site and the potential to walk to school: The impact of street connectivity and traffic exposure in school neighborhoods

2011 ◽  
Vol 17 (2) ◽  
pp. 545-550 ◽  
Author(s):  
Billie Giles-Corti ◽  
Gina Wood ◽  
Terri Pikora ◽  
Vincent Learnihan ◽  
Max Bulsara ◽  
...  
2009 ◽  
Vol 4 (2) ◽  
pp. 97 ◽  
Author(s):  
Joyce Yukawa ◽  
Violet H. Harada

Objective – This study analyzed the effects of a practice-based model of professional development on the teaching and collaborative practices of 9 teams of librarians and teachers, who created and implemented units of inquiry-focused study with K-12 students during a yearlong course. The authors describe how the collection and analysis of evidence guided the development team in the formative and summative evaluations of the outcomes of the professional development, as well as the long-term results of participation in this initiative. Methods – The authors used an interpretive, participative approach. The first author was the external reviewer for the project; the second author headed the development team and served as a participant-observer. Triangulated data were collected from participants in the form of learning logs, discussion board postings, interviews, questionnaires, and learning portfolios consisting of unit and lesson plans and student work samples with critiques. Data were also collected from the professional development designers in the form of meeting notes, responses to participants, interviews, and course documents. For two years following the end of the formal course, the authors also conducted follow-up email correspondence with all teams and site visits with six teams to determine sustained or expanded implementation of inquiry-focused, collaborative curriculum development. Results – The practice-based approach to professional development required continual modification of the course design and timely, individualized mentoring and feedback, based on analysis and co-reflection by the developers on the evidence gathered through participant logs, reports, and school site visits. Modeling the inquiry process in their own course development work and making this process transparent to the participating community were essential to improvement. Course participants reported beneficial results in both immediate and long-term changes in practice. The summative evaluation identified significant changes in practice in three areas: (1) the design of inquiry-focused learning, (2) the roles of the teacher and librarian in collaborative development of instruction, and (3) the impact on student performance. Two years after the yearlong professional development course, most participants indicated that they continued to incorporate inquiry-based approaches, and over half of the participants were involving other colleagues at their schools in inquiry-focused practices. Six of the librarians assumed major curricular roles in their respective schools. Conclusion – The practice-based model of professional development appears to be effective and sustainable. It has been tested and modified by other development teams in the last two years. More extensive use of the model in other contexts with further testing and refinement by other developers is needed to ensure that the model is robust and widely applicable.


2006 ◽  
Vol 3 (1) ◽  
pp. 37-47 ◽  
Author(s):  
Richard R. Suminski ◽  
Rick L. Petosa ◽  
Walker C.S. Poston ◽  
Emily Stevens ◽  
Laura Katzenmoyer

Background:Methods are needed to assess the impact of walk-to-school programs on behavior. This study developed an observation method for counting the number of children and adults walking/biking to school.Methods:Two elementary schools located in different urban, US census tracts were chosen for this study. Six walking/biking routes to each school were observed for 30 min before and after school. Strict guidelines were followed for determining whether a child/adult was counted.Results:Levels of agreement between observers were over 97% for children and adults. Reliability coefficients (R) for two days of observations exceeded 0.90 for children and adults walking. No differences were seen between days of the week or before and after school observation periods (P > 0.05). The number seen walking did depend on the route observed (P < 0.01).Conclusion:This study presents a reliable observation method for determining the number of children and adults walking and biking to/from school.


2015 ◽  
Vol 85 (3) ◽  
pp. 383-412 ◽  
Author(s):  
Dafney Blanca Dabach

In this article, Dafney Blanca Dabach investigates how teachers and their students of different citizenship statuses navigate tensions in formal state-sponsored citizenship education. In traditional US high school civics courses, undocumented immigrant youths' liminal status is often invisible and overlooked as undocumented youth are educated alongside their peers who have full citizenship rights. Disjunctures between idealized rights and structural exclusions become barriers to meaningful civic education. Through this qualitative case study, Dabach examines the possibilities of a teacher's brokering role across different forms of knowledge and experience in a classroom that included undocumented immigrants, naturalized immigrants, and US-born students whose parental origins spanned twelve countries across five continents. She asks: How do civics teachers who are aware of their students' varied citizenship statuses discuss political participation in mixed-status classrooms during nationally focused events, such as elections? And, how do students of differing citizenship statuses respond during such times? Dabach demonstrates how the teacher apprenticed youth into practices of political participation while recounting narratives about the impact of immigration deportation policies at the local school site. In doing so, the teacher breached norms of silence, interrupting norms that contribute to maintaining status quo exclusions. This case study documents how the teacher simultaneously socialized youth of different citizenship statuses in ways that they found meaningful—across citizenship types. This work contributes to conceptualizing how civic education may be more inclusive in the face of systematic exclusions.


2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Zhi-jian Wu ◽  
Yanliqing Song ◽  
Hou-lei Wang ◽  
Fan Zhang ◽  
Fang-hui Li ◽  
...  

Abstract Background Urbanization and aging are global phenomena that offer unique challenges in different countries. A supportive environment plays an important role in addressing the issues of health behavioral change and health promotion (e.g., prevent chronic illnesses, promote mental health) among older adults. With the development of the socio-ecological theoretical model, studies on the impact of supportive environments on physical activity have become popular in the public health field in the EU and US. Meanwhile, very few Chinese studies have examined the relationship between built environment features and older adults’ physical activity at the ecological level. The purpose of the study is to investigate how the factors part of the built environment of Nanjing’s communities also influence leisure time physical activity among the elderly. Methods Using a socio-ecological model as a theoretical framework, we conducted a cross-sectional study of 399 elderly people from 19 communities in Nanjing, China, using a one-on-one questionnaire to collect data, including participants’ perceived built environment and self-reported physical activity. A multivariate linear regression method was used to analyze the factors influencing their recreational physical activity. Results This study found that compared to older people with low average monthly income, the recreational physical activity of the elderly with average monthly incomes between 1001 and 2000 ¥ (β = 23.31, p < 0.001) and 2001 ¥ or more (β = 21.15, p < 0.001) are significantly higher. After controlling for individual covariates, street connectivity (β = 7.34, p = 0.030) and street pavement slope (β = − 7.72, p = 0.020), we found that two out of ten built environment factors indicators influence their physical activity. The importance of each influencing factor ranked from highest to lowest are monthly average income, street pavement slope, and street connectivity. Other factors were not significantly related to recreational physical activity by the elderly. Conclusions Older adults with a high income were more likely to participate in recreational physical activity than those with a low income. In order to positively impact physical activity in older adults and ultimately improve health, policymakers and urban planners need to ensure that street connectivity and street pavement slope are factored into the design and development of the urban environment.


2002 ◽  
Vol 10 ◽  
pp. 32 ◽  
Author(s):  
James E. Bruno

School reform efforts aimed at promoting equity and excellence at urban school settings are heavily dependent upon the quality of teaching personnel that are used to deliver the instructional program. Social Justice and other public policy issues related to equity and excellence at urban schools have begun to examine the impact that teacher absenteeism, and by extension the reliance on substitute teachers to deliver instructional might have on educational attainment. This study combines school district data gathering mechanisms on teacher absence rates at school sites with Geographical Information Systems (G.I.S.) to map the association between a school's geographical environmental space and the propensity for teacher absence. The disparity between teaching resources as delivered by the school district vs. teacher resources as actually received by students in the classroom via teacher absenteeism is examined in the context of schools located in positive (high income) and negative (low income) geographical space. The study concludes that there is a strong association between the geographical quality of the school site setting, teacher absenteeism, and the reliance on substitute teachers to deliver instructional programs. Disparity in teacher absenteeism rates across large urban geographical areas threatens the promotion of equity and excellence in the schools by attenuating or lessening the effect of school resources to support instruction and amplifying the risk factors of students in the classroom.


2017 ◽  
Vol 44 (12) ◽  
pp. 1036-1044 ◽  
Author(s):  
Ahmed Osama ◽  
Tarek Sayed

With the increasing demand for sustainability, walking is being encouraged as a main active mode of transportation. However, pedestrians are vulnerable to severe injuries when involved in crashes, which can discourage road users from walking. Therefore, studying the factors that affect the safety of pedestrians is important. This paper investigates the relationship between pedestrian-vehicle crashes and various zone characteristics in the city of Vancouver. The goal is to assess the impact of socio-economics, land use, built environment, and road facility on pedestrian safety using macro-level collision prediction models. The models were developed using generalized linear regression and full Bayesian techniques. Both walking trips and vehicle kilometres travelled were used as the main traffic exposure variables in the models. The safety models showed that pedestrian-motorist crashes were non-linearly positively associated with the increase in traffic exposure. The crashes were also found positively associated with the socio-economic variables (i.e., employment and household densities), some built environment variables (transit stop, traffic signal, and light pole densities), commercial area density, and arterial-collector roads proportion. On the other hand, the models revealed a decline in the pedestrian-motorist crashes associated with the increase in the proportions of pedestrian-actuated signals and local roads, as well as the increase in the recreational and residential areas’ densities. The spatial effects were accounted for in the full Bayes models and were found significant, which imply the importance of considering spatial correlation when developing macro-level pedestrian safety models.


1962 ◽  
Vol 14 ◽  
pp. 415-418
Author(s):  
K. P. Stanyukovich ◽  
V. A. Bronshten

The phenomena accompanying the impact of large meteorites on the surface of the Moon or of the Earth can be examined on the basis of the theory of explosive phenomena if we assume that, instead of an exploding meteorite moving inside the rock, we have an explosive charge (equivalent in energy), situated at a certain distance under the surface.


1962 ◽  
Vol 14 ◽  
pp. 169-257 ◽  
Author(s):  
J. Green

The term geo-sciences has been used here to include the disciplines geology, geophysics and geochemistry. However, in order to apply geophysics and geochemistry effectively one must begin with a geological model. Therefore, the science of geology should be used as the basis for lunar exploration. From an astronomical point of view, a lunar terrain heavily impacted with meteors appears the more reasonable; although from a geological standpoint, volcanism seems the more probable mechanism. A surface liberally marked with volcanic features has been advocated by such geologists as Bülow, Dana, Suess, von Wolff, Shaler, Spurr, and Kuno. In this paper, both the impact and volcanic hypotheses are considered in the application of the geo-sciences to manned lunar exploration. However, more emphasis is placed on the volcanic, or more correctly the defluidization, hypothesis to account for lunar surface features.


1997 ◽  
Vol 161 ◽  
pp. 197-201 ◽  
Author(s):  
Duncan Steel

AbstractWhilst lithopanspermia depends upon massive impacts occurring at a speed above some limit, the intact delivery of organic chemicals or other volatiles to a planet requires the impact speed to be below some other limit such that a significant fraction of that material escapes destruction. Thus the two opposite ends of the impact speed distributions are the regions of interest in the bioastronomical context, whereas much modelling work on impacts delivers, or makes use of, only the mean speed. Here the probability distributions of impact speeds upon Mars are calculated for (i) the orbital distribution of known asteroids; and (ii) the expected distribution of near-parabolic cometary orbits. It is found that cometary impacts are far more likely to eject rocks from Mars (over 99 percent of the cometary impacts are at speeds above 20 km/sec, but at most 5 percent of the asteroidal impacts); paradoxically, the objects impacting at speeds low enough to make organic/volatile survival possible (the asteroids) are those which are depleted in such species.


1997 ◽  
Vol 161 ◽  
pp. 189-195
Author(s):  
Cesare Guaita ◽  
Roberto Crippa ◽  
Federico Manzini

AbstractA large amount of CO has been detected above many SL9/Jupiter impacts. This gas was never detected before the collision. So, in our opinion, CO was released from a parent compound during the collision. We identify this compound as POM (polyoxymethylene), a formaldehyde (HCHO) polymer that, when suddenly heated, reformes monomeric HCHO. At temperatures higher than 1200°K HCHO cannot exist in molecular form and the most probable result of its decomposition is the formation of CO. At lower temperatures, HCHO can react with NH3 and/or HCN to form high UV-absorbing polymeric material. In our opinion, this kind of material has also to be taken in to account to explain the complex evolution of some SL9 impacts that we observed in CCD images taken with a blue filter.


Sign in / Sign up

Export Citation Format

Share Document