3,472 research outputs found
Pilot study of the potential contributions of LANDSAT data in the construction of area sampling frames
There are no author-identified significant results in this report
Exploring spatial variability in the relationship between long term limiting illness and area level deprivation at the city level using geographically weighted regression
This is the final version of the article. Available from the publisher via the DOI in this record.Ecological influences on health outcomes are associated with the spatial stratification of
health. However, the majority of studies that seek to understand these ecological influences utilise
aspatial methods. Geographically weighted regression (GWR) is a spatial statistics tool that expands
standard regression by allowing for spatial variance in parameters. This study contributes to the
urban health literature, by employing GWR to uncover geographic variation in Limiting Long Term
Illness (LLTI) and area level effects at the small area level in a relatively small, urban environment.
Using GWR it was found that each of the three contextual covariates, area level deprivation scores,
the percentage of the population aged 75 years plus and the percentage of residences of white
ethnicity for each LSOA exhibited a non-stationary relationship with LLTI across space.
Multicollinearity among the predictor variables was found not to be a problem. Within an
international policy context, this research indicates that even at the city level, a “one-size fits all”
policy strategy is not the most appropriate approach to address health outcomes. City “wide” health
polices need to be spatially adaptive, based on the contextual characteristics of each area
An evaluation of thematic mapper simulator data for the geobotanical discrimination of rock types in Southwest Oregon
Rock type identification may be assisted by the use of remote sensing of associated vegetation, particularly in areas of dense vegetative cover where surface materials are not imaged directly by the sensor. The geobotanical discrimination of ultramafic parent materials was investigated and analytical techniques for lithologic mapping and mineral exploration were developed. The utility of remotely sensed data to discriminate vegetation types associated with ultramafic parent materials in a study area in southwest Oregon were evaluated. A number of specific objectives were identified, which include: (1) establishment of the association between vegetation and rock types; (2) examination of the spectral separability of vegetation types associated with rock types; (3) determination of the contribution of each TMS band for discriminating vegetation associated with rock types and (4) comparison of analytical techniques for spectrally classifying vegetation
Tapered optical fibers as tools for probing magneto-optical trap characteristics
We present a novel technique for measuring the characteristics of a
magneto-optical trap for cold atoms by monitoring the spontaneous emission from
trapped atoms coupled into the guided mode of a tapered optical nanofiber. We
show that the nanofiber is highly sensitive to very small numbers of atoms
close to its surface. The size and shape of the MOT, determined by translating
the cold atom cloud across the tapered fiber, is in excellent agreement with
measurements obtained using the conventional method of fluorescence imaging
using a CCD camera. The coupling of atomic fluorescence into the tapered fiber
also allows us to monitor the loading and lifetime of the trap. The results are
compared to those achieved by focusing the MOT fluorescence onto a photodiode
and it was seen that the tapered fiber gives slightly longer loading and
lifetime measurements due to the sensitivity of the fiber, even when very few
atoms are present.Comment: 21 pages, 5 figure
The varying economic impacts of Marine Spatial Planning across different geographical scales: a Q methodology study
This is the author accepted manuscript. The final version is available from Routledge via the DOI in this record
Participative critical enquiry in graduate field-based learning
This paper outlines a critical pedagogic approach to field-based learning (FBL) at graduate level. Drawing on student experience stemming from a FBL module and as part of an MA programme in Environment, Society and Development, the paper addresses the complexities associated with student-led, participative critical enquiry during fieldwork in Sarajevo, Bosnia-Herzegovina. The paper examines emerging student discourses through a group assessment and a series of individual reflective journals. Both are contextualised in relation to FBL module learning outcomes. Finally, aspects of fieldwork influencing the feasibility and effectiveness of participative critical enquiry as a field-based pedagogic endeavour are considered
An ultra-bright atom laser
We present a novel, ultra-bright atom-laser and ultra-cold thermal atom beam.
Using rf-radiation we strongly couple the magnetic hyperfine levels of 87Rb
atoms in a magnetically trapped Bose-Einstein condensate. At low rf-frequencies
gravity opens a small hole in the trapping potenital and a well collimated,
extremely bright atom laser emerges from just below the condensate. As opposed
to traditional atom lasers based on weak coupling, this technique allows us to
outcouple atoms at an arbitrarily large rate. We demonstrate an increase in
flux per atom in the BEC by a factor of sixteen compared to the brightest
quasi-continuous atom laser. Furthermore, we produce by two orders of magnitude
the coldest thermal atom beam to date (200 nK).Comment: 20 pages, 9 figures, supplementary material online at
http://www.bec.g
IMPACT: The Journal of the Center for Interdisciplinary Teaching and Learning. Volume 8, Issue 1, Winter 2019
IMPACT: The Journal of the Center for Interdisciplinary Teaching & Learning is a peer-reviewed, biannual online journal that publishes scholarly and creative non-fiction essays about the theory, practice and assessment of interdisciplinary education. Impact is produced by the Center for Interdisciplinary Teaching & Learning at the College of General Studies, Boston University (www.bu.edu/cgs/citl).In this issue of Impact you will find a humanities scholar deeply engaged with the arcing out of a new territory: the interdisciplinary study of the Grateful Dead. Impact’s own Christopher Coffman’s review essay should be required reading for scholars of popular music, performance studies and history. His review also serves as an important reference for those who aspire to teach a course on the Grateful Dead, as well as for those who wish to write review essays. In this issue we also hear from those who are engaged in teaching people who are incarcerated. Importantly, Stephanie Cage’s essay looks to incarcerated people themselves to find out what they think about prison education. Peter Wakefield encourages us to see The Great Gatsby anew, in particular in the context of American racism and White supremacy. Wakefield’s essay is important too because it had its genesis in Writing, the State, and the Rise of Neo-Nationalism: Historical Contexts and Contemporary Concerns, a conference sponsored by the Center for Interdisciplinary Teaching & Learning
Genome-scale models as a vehicle for knowledge transfer from microbial to mammalian cell systems
With the plethora of omics data becoming available for mammalian cell and, increasingly, human cell systems, Genome-scale metabolic models (GEMs) have emerged as a useful tool for their organisation and analysis. The systems biology community has developed an array of tools for the solution, interrogation and customisation of GEMs as well as algorithms that enable the design of cells with desired phenotypes based on the multi-omics information contained in these models. However, these tools have largely found application in microbial cells systems, which benefit from smaller model size and ease of experimentation. Herein, we discuss the major outstanding challenges in the use of GEMs as a vehicle for accurately analysing data for mammalian cell systems and transferring methodologies that would enable their use to design strains and processes. We provide insights on the opportunities and limitations of applying GEMs to human cell systems for advancing our understanding of health and disease. We further propose their integration with data-driven tools and their enrichment with cellular functions beyond metabolism, which would, in theory, more accurately describe how resources are allocated intracellularly
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