6,321 research outputs found
The Evolution of the Retail Trade sector in Iberian Cities from the Nineteenth Century to the Second World War.
This is an Accepted Manuscript version of an article published by Taylor & Francis on 16 May 2017, available online at: http://dx.doi.org/10.1080/2373518X.2017.1329195.The evolution of retail trade in European cities during the first decades of the twentieth century can be a powerful indicator about their urban and social dynamics. The growth in the number of shops, the spatial rearrangement of their distribution, and the increased social and political relevance of shopkeepers are features commonly highlighted by the historiography. But this picture is better known for Central and Northern European cities. As for the Iberian Peninsula although some efforts can be mentioned, there are still progress to be made. The papers discussed in this introductory essay address those questions through a double perspective: first, an analysis of the urban space and its impact on the development of the retail trade's spatial distribution and evolution; second, a historical and comparative analysis of four Iberian cities trying to build a better picture about the spatial, social and economic relevance of their retail trade. These perspectives will be explored for the cities of La Coruña, Barcelona, Bilbao and Lisbon studying the retail trade spatial distribution and the introduction of new forms of commercial concentration and consumption, roughly between 1840 and 1940Peer reviewe
Beyond Paris: 11 innovations in aid effectiveness
The current framework for improving aid effectiveness, the 'Paris' agenda of harmonisation and alignment, has been found lacking. Alternatives are needed. This paper highlights some examples of recent innovations in the management and delivery of development aid. Drawing upon Barder (2009) and Howes (2011), the paper structures 11 innovations into three categories: improving the quality of the aid donor; improving the quality of the aid recipient; and improving how donors interact and the way aid is given. By examining these 11 innovations, the paper shows that aid agencies have the potential to adapt and evolve. The challenge for donors is to start selecting good ideas for implementation now and to never stop searching for new innovations to improve aid effectiveness.aid
Chocolate, Coffee and Commodity
This comment considers the history of chocolate in parallel to that of coffee, in order to identify not only patterns of similarity and distinction, but also to highlight potential strategies for explanation and their implications for the writing of commodity history.Peer reviewedFinal Accepted Versio
Improving construction design : The lean thinking paradigm
A study has been conducted into improving construction design through the
application of the lean thinking paradigm. Its objective was to identify the issues
relating to design efficiency and how a lean thinking approach might address
these issues. The investigation consisted of examining work already
undertaken in the field by other researchers"to identify the state of the art. The
change order request system was examined to gain first insights into waste in
construction design, and to gauge the size of the opportunity for the application
of lean thinking. An Electronic Data Gathering Tool (EDGT) was then
developed to allow further exploration of the design decision making process at
the system / sub-system level. The EDGT was used on three live construction
projects. From the data recorded a design planning tool, Design Decision
Planner (DDP), was created to help improve control of the design process and
lead to a more standardised approach to construction design. Standardising
the approach to product development is an important component of lean
thinking.
The main recommendations for making construction design lean are:
Use DDP to plan and improve control of the design decision making
process, assign design responsibility and to make the process more
transparent.
2. Measuring progress against planned design is a useful process metric.
3. Improve the designer's cost and programme visibility when choosing
between design options.
4. Redefine the role of the quantity surveyor from cost controller to value for
money assessor. The role needs to be better integrated into the design
process to reach its full potential.
5. Need to develop more rigorous methods of assessing the buildability of
design options. This problem could be eased in the short-term by
incorporating construction professionals into the early design phases.
6. Designers need to use more process reason drivers when choosing
between design options, not just functional criteria.
7. The change order request system could be redesigned to identify the root
causes of contract issue design changes and, hence, improve the design
decision making process
Dynamic Pion Studies in Nuclear Matter
A framework is developed which allows the extension of current realistic Nucleon-Nucleon interactions to include pionic degrees of freedom. A prescription for transforming any static pion model to one containing explicit energy dependence is provided. We show that adding energy dependence to the pionic component of the Nucleon-Nucleon interaction reduces the component of D-state wave function in the deuteron while adding a non-negligible chance of finding the deuteron in an NNπ state. Retrofitting the static pion Reid soft-core potential with dynamic pions entailed a necessary refit of the parameters in the central and tensor parts of the potential to phase shifts and deuteron data. Dynamic pions offer a natural and physical way to handle inelasticities in phase shifts above pion-production threshold. Other observables, such as the: p,2p) analyzing power Ay, which indicate explicit energy dependence, have resisted many attempts at modeling using static pion models, but dynamic pion models show some promise at explaining these data. Finally, the effects of dynamic pions in nuclear matter are explored, and it is shown that even below pion-production threshold, allowing pions to propagate leads to a decrease in saturation density without significant change to the overall binding energy per nucleon
Physics Department : message to students
This is a document sent to all majors within the physics department to give them a sense of what we were aiming for during remote learning. We hope it gives them purpose, hope, and understanding of all of our roles. The people mentioned by name are Dennis Tierney (building manager of Lindner Hall) and Marca Kasselmann (administrative assistant for physics and chemistry) both of whom our majors know well.https://www.exhibit.xavier.edu/covid19xu_documents/1003/thumbnail.jp
A Keystone Ant Species Provides Robust Biological Control of the Coffee Berry Borer Under Varying Pest Densities
Species’ functional traits are an important part of the ecological complexity that
determines the provisioning of ecosystem services. In biological pest control, predator response
to pest density variation is a dynamic trait that impacts the provision of this service in
agroecosystems. When pest populations fluctuate, farmers relying on biocontrol services need to
know how natural enemies respond to these changes. Here we test the effect of variation in
coffee berry borer (CBB) density on the biocontrol efficiency of a keystone ant species (Azteca
sericeasur) in a coffee agroecosystem. We performed exclosure experiments to measure the
infestation rate of CBB released on coffee branches in the presence and absence of ants at four different CBB density levels. We measured infestation rate as the number of CBB bored into
fruits after 24 hours, quantified biocontrol efficiency (BCE) as the proportion of infesting CBB
removed by ants, and estimated functional response from ant attack rates, measured as the
difference in CBB infestation between branches.
Infestation rates of CBB on branches with ants were significantly lower (71%-82%) than
on those without ants across all density levels. Additionally, biocontrol efficiency was generally
high and did not significantly vary across pest density treatments. Furthermore, ant attack rates increased linearly with increasing CBB density, suggesting a Type I functional response. These
results demonstrate that ants can provide robust biological control of CBB, despite variation in
pest density, and that the response of predators to pest density variation is an important factor in
the provision of biocontrol services. Considering how natural enemies respond to changes in pest densities will allow for more accurate biocontrol predictions and better-informed management of
this ecosystem service in agroecosystems.Master of ScienceNatural Resources and EnvironmentUniversity of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/117665/1/Morris Thesis 2016.pd
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