929 research outputs found
A CPTED bibliography: Publications related to urban space, planning, architecture, and crime prevention through environmental design, 1975-2010
This compendium is the result of two different bibliographies. The first was completed by Sean Michael, Professor and Department Head of the Department of Landscape Architecture and Environmental Planing at Utah State University. The second was completed by Gregory Saville, urban planner and Principal of AlterNation Consulting, started during graduate work at the Faculty of Environmental Studies at York University. Consolidation and expansion of the two works was overseen by Joel Warren, during his Masters of Landscape Architecture at Utah State University.
Our thanks go to the many students, colleagues, and friends who contributed to this work over the years. They include: Anna Brassard, Paul Cozens, Misty Fitch, Chuck Genre, and Diane Zahm. Earlier versions have appeared in different venues through the years such as the 2003 ICA CPTED Bibliography available on CD through the International CPTED Association and the Latin America CPTED Region Corporation. In addition, Emerald Press has published a detailed literature review of basic 1st Generation CPTED studies (P. Cozens, G. Saville and D. Hillier, âCrime prevention through environmental design: A review and modern bibliographyâ, Property Management. 23(5), 2005). Finally, an early version was available via The CPTED Page (www.thecptedpage.wsu.edu). Today, the resource is jointly hosted through the web site of Safe Cascadia (www.safecascadia.org
Assembly of Colloidal Aggregates by Electrohydrodynamic Flow: Kinetic Experiments and Scaling Analysis
Electric fields generate transverse flows near electrodes that sweep colloidal particles into densely packed assemblies. We interpret this behavior in terms of electrohydrodynamic motion stemming from distortions of the field by the particles that alter the body force distribution in the electrode charge polarization layer. A scaling analysis shows how the action of the applied electric field generates fluid motion that carries particles toward one another. The resulting fluid velocity is proportional to the square of the applied field and decreases inversely with frequency. Experimental measurements of the particle aggregation rate accord with the electrohydrodynamic theory over a wide range of voltages and frequencies
New times, new politics: history and memory during the final years of the CPGB
This article examines the relationship between collective memory, historical interpretation and political identity. It focuses on the dissolution of the Communist Party of Great Britain (CPGB) as constructed through collective narrative memory, and on Marxist interpretations of history. The divisions within the party and the wider Marxist community, stretching from 1956 until 1991, were often framed around questions of historical interpretation. The events of 1989â1991 created an historical and mnemonic crisis for CPGB members who struggled to reconcile their past identities with their present situation. Unlike the outward-facing revisionism of other political parties, this was an intensely personal affair. The solution for many was to emphasise the need to find new ways to progress socialist aims, without relying on a discredited grand narrative. In contrast, other Communist parties, such as the Communist Party of Britain, which had been established (or âre-establishedâ) in 1988, fared rather better. By adhering to the international party line of renewal and continued struggle, the party was able to hold its narrative together, condemning the excesses of totalitarian regimes, while reaffirming the need for international class struggle
Effects of caffeine on reaction time are mediated by attentional rather than motor processes
Background
Caffeine has a well-established effect on reaction times (RTs) but the neurocognitive mechanisms underlying this
are unclear.
Methods
In the present study, 15 female participants performed an oddball task after ingesting caffeine or a placebo, and
electroencephalographic data were obtained. Single-trial P3b latencies locked to the stimulus and to the response were extracted
and mediation models were fitted to the data to test whether caffeineâs effect on RTs was mediated by its effect on either type of
P3b latencies.
Results
Stimulus-locked latencies showed clear evidence of mediation, with approximately a third of the effect of caffeine on RTs
running through the processes measured by stimulus-locked latencies. Caffeine did not affect response-locked latencies, so could
not mediate the effect.
Discussion
These findings are consistent with caffeineâs effect on RTs being a result of its effect on perceptual-attentional
processes, rather than motor processes. The study is the first to apply mediation analysis to single-trial P3b data and this technique
holds promise for mental chronometric studies into the effects of psychopharmacological agents. The R code for performing the
single trial analysis and mediation analysis are included as supplementary materials
Engagement of patients with scleroderma to revise an internet self-management program
Systemic sclerosis (SSc) or scleroderma is a rare connective tissue disease. Many people do not have access to education programs. A self-management program was developed several years ago based on the literature and input from people with SSc. However, new therapies and treatment options have been developed since the program was developed. The purpose of this qualitative study was to identify and remedy gaps in an internet SSc self-management program to improve the quality of critical information relevant to effective management of the disease. Six focus groups with 30 participants with SSc were conducted: 2 telephone groups and 4 face-to-face groups. Prior to the focus group meetings, participants reviewed the existing website. A semi-structured interview guide elicited participantsâ responses. Gaps were expressed in affect and positive affirmation; disease and symptom management; self-advocacy; information for caregivers, families, coworkers and strangers; tracking systems; information about local support groups; pictures and information on underrepresented groups; and general format. Discussants were positive regarding the audio voice over, exercise module, current content, health logs and checklists. People with SSc identified additional content to improve the internet self-management program. Many of the suggestions were incorporated into the existing program as modifications and additions to existing modules, patient testimonials, worksheets, resources sheets, and/or links to additional websites. People with rare, chronic conditions such as SSc need education and reliable sources of information and self-management skills.
Experience Framework
This article is associated with the Innovation & Technology lens of The Beryl Institute Experience Framework. (http://bit.ly/ExperienceFramework) Access other PXJ articles related to this lens. Access other resources related to this len
Independent Ion Migration in Suspensions of Strongly Interacting Charged Colloidal Spheres
We report on sytematic measurements of the low frequency conductivity in
aequous supensions of highly charged colloidal spheres. System preparation in a
closed tubing system results in precisely controlled number densities between
1E16/m3 and 1E19/m^3 (packing fractions between 1E-7 and 1E-2) and electrolyte
concentrations between 1E-7 and 1E-3 mol/l. Due to long ranged Coulomb
repulsion some of the systems show a pronounced fluid or crystalline order.
Under deionized conditions we find s to depend linearily on the packing
fraction with no detectable influence of the phase transitions. Further at
constant packing fraction s increases sublinearily with increasing number of
dissociable surface groups N. As a function of c the conductivity shows
pronounced differences depending on the kind of electrolyte used. We propose a
simple yet powerful model based on independent migration of all species present
and additivity of the respective conductivity contributions. It takes account
of small ion macro-ion interactions in terms of an effectivly transported
charge. The model successfully describes our qualitatively complex experimental
observations. It further facilitates quantitative estimates of conductivity
over a wide range of particle and experimental parameters.Comment: 32 pages, 17 figures, 2 tables, Accepted by Physical Review
Mass spectrometry-directed structure elucidation and total synthesis of ultra-long chain (O-acyl)-Ï-hydroxy fatty acids
The (O-acyl)-Ï-hydroxy FAs (OAHFAs) comprise an unusual lipid subclass present in the skin, vernix caseosa, and meibomian gland secretions. Although they are structurally related to the general class of FA esters of hydroxy FAs (FAHFAs), the ultra-long chain (30-34 carbons) and the putative -substitution of the backbone hydroxy FA suggest that OAHFAs have unique biochemistry. Complete structural elucidation of OAHFAs has been challenging because of their low abundance within complex lipid matrices. Furthermore, because these compounds occur as a mixture of closely related isomers, insufficient spectroscopic data have been obtained to guide structure confirmation by total synthesis. Here, we describe the full molecular structure of ultra-long chain OAHFAs extracted from human meibum by exploiting the gas-phase purification of lipids through multistage MS and novel multidimensional ion activation methods. The analysis elucidated sites of unsaturation, the stereochemical configuration of carbon-carbon double bonds, and ester linkage regiochemistry. Such isomer-resolved MS guided the first total synthesis of an ultra-long chain OAHFA, which, in turn, confirmed the structure of the most abundant OAHFA found in human meibum, OAHFA 50:2. The availability of a synthetic OAHFA opens new territory for future investigations into the unique biophysical and biochemical properties of these lipids
Death and Display in the North Atlantic: The Bronze and Iron Age Human Remains from Cnip, Lewis, Outer Hebrides
YesThis paper revisits the series of disarticulated human remains discovered during the 1980s excavations of the Cnip wheelhouse complex in Lewis. Four fragments of human bone, including two worked cranial fragments, were originally dated to the 1st centuries BC/AD based on stratigraphic association. Osteoarchaeological reanalysis and AMS dating now provide a broader cultural context for these remains and indicate that at least one adult cranium was brought to the site more than a thousand years after the death of the individual to whom it had belonged
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