共查询到20条相似文献，搜索用时 383 毫秒
1.
Peter V. Hall 《GeoJournal》2009,74(1):67-83
Over the past 50 years, containerization has both enabled and reflected the articulation of increasingly concentrated and
complex global trade flows. Once close infrastructural, economic and institutional ties between seaports and port cities have
been loosened, since major ports now serve producers and consumers in widely dispersed hinterlands. This process has been
especially intense in North America, where west coast ports serve markets across the continent. At the same time, many of
the external costs of increased port activity are incurred in port cities. Hence, questions about the changing nature of employment
in port and related goods-handling sectors have become increasingly important for understanding the share of economic benefits
received by port cities. This paper focuses on the effects of containerization, and related changes in transportation regulation,
on port-logistics worker earnings in major United States port cities since 1975. A difference-in-differences framework is
used to examine the relative annual earnings of dock, trucking and warehouse workers in major container port cities. The analysis
shows that, with notable exceptions, port-logistics worker earnings in major container ports are not necessarily higher than
those of comparable workers. The findings provide further insights into the strained relationship between seaports and port
cities in the era of containerization and economic globalization.
相似文献
| Peter V. HallEmail: |
2.
Recent academic debates about port competition have centered on the strategic responses of port authorities, operators, managers
and owners to the emergence of global supply chains. The competitive performance of a port authority or operator, given the
rise of the integrated logistics sector, depends increasingly on its strategic relationship to these supply chains and rather
less on traditional port competition factors such as hinterland size and physical infrastructure. However, there are few empirical
studies investigating the degree to which particular port actors are capable of inserting themselves into global supply chains.
In this article we ask what factors condition the supply chain strategies of port actors. We hypothesize that the strategic
supply chain choices of a port authority or operator are conditioned by the territorialized institutional framework in which
the dominant actors in a port operate. We apply these insights through a case study of the transformation of Dubai Port Authority,
and the rise of Dubai Ports World (DPW).
相似文献
| Peter V. HallEmail: |
3.
Melt inclusion formation mechanisms and compositional effects in high-An feldspar and high-Fo olivine in anhydrous mafic silicate liquids 总被引：1，自引：1，他引：0
Important aspects of melt inclusion formation and potential compositions effects have been addressed through a series of experiments using anorthite/fosterite saturated anhydrous mafic liquids. Experimental charges were cooled from 1,300 to 1,230 and 1,210°C at rates of 1–10°/min followed by 0–24 h isothermal periods. Hopper and skeletal crystal morphologies with variable degrees of completeness developed during the cooling period. Planar overgrowth of these textures during isothermal periods led to the formation of inclusions, the majority of which formed after 6 h of isothermal run time. We suggest that the change in morphologies is related to a decrease in growth rates and changes in dominant growth mechanisms. In general, inclusion compositions were uniform and similar to the host glass, indicating that with the isothermal times required for most inclusions to form, a boundary layer was not entrapped that could be detected within the limits of our analyses.
相似文献
| Edward KohutEmail: Phone: +1-541-7373023Fax: +1-541-7371200 |
| Roger L. NielsenEmail: Phone: +1-541-7371235 |
4.
The advent of the Virtual Observatory has begun an evolution in the space physics data environment. A number of nascent and
discipline specific Virtual Observatories have started to emerge with an emphasis on data search and retrieval. As this new
data environment takes shape an emphasis will be placed on interdisciplinary communication in attempts to address large scale
and global problems. To this end we formulate the development of a query language to facilitate Virtual Observatory to Virtual
Observatory communication. Furthermore, we outline the goals of such a language, how it would work and how existing community
efforts can be leveraged to speed the development of this query language.
相似文献
| T.W. NarockEmail: |
5.
This paper describes an application of the geographic information system (GIS) technology to a ground stability assessment
in the karst area of Dzerzhinsk, Russia. In the stability analysis, the groundwater level changes in the karst aquifer could
cause suffosion sinkholes when the gravitational force was greater than the soil strength. The GIS technology was used to
combine various data and to delineate the zones of potential gravitational collapse and suffosion collapse in the area.
相似文献
| V. V. TolmachevEmail: |
6.
This study seeks to gauge how far China’s container-related dynamics between 1990 and 2005 fit into the wider perspective
about transport and development within developing countries. In particular, attention is focussed on the role of specific
modes to determine the extent of the penetration of containers within China. Before addressing these key issues extant models
relating to an understanding of port and transport evolution in less-developed countries are recalled, synthesized and used
as a base upon which an appropriate review of China’s case can be conducted. Applying them to China’s northern, central and
southern port ranges not only helps assess the efficacy of these models but also highlights the contribution of individual
modes.
相似文献
| Claude ComtoisEmail: |
7.
Transportation infrastructure has always played an important role in the economic fate of regions. In particular, airline
networks have dramatically decreased the geographic and temporal constraints of moving people, goods and information; all
of which are increasingly crucial inputs for the information economy. As a result, regions have become more concerned with
both the quantity and quality of airline connections. The purpose of this paper is to examine the emerging global hierarchy
of airline network connectivity. Using a proprietary database of nearly 900 airline carrier schedules from 2006, we examine
regional connectivity between 4,650 worldwide origins and destinations. Through the use of network analysis and graph theoretical
techniques, results indicate an increasingly complex web of nodal hierarchies in North America, Europe and Asia.
相似文献
| Tony H. GrubesicEmail: |
8.
Explaining foreign diplomatic presence in the U.S. with spatial models: a liberal spatial perspective 总被引：1，自引：0，他引：1
This paper examines the effect of economic interdependence, intergovernmental organizations, political freedom, and spatial relationship on foreign diplomatic presence in the U.S. from 1980 to 2000. Spatial perspective is largely missing in the mainstream international theories. Spatial relationship has three measures: spatial proximity measured as distance, spatial dependency measured as neighborhood effect, and spatial heterogeneity measured as regional effect. We found that the effect of economic interdependence is directional. The U.S. sensitivity to foreign trade rather than foreign sensitivity to trade with the U.S. explains much of the variation in the foreign diplomatic presence in the U.S. Spatial effect is mainly manifested as spatial dependency; the effects of geographic proximity and geographic regions on foreign diplomatic presence are, however, mild. Spatial dependency in the variation of foreign diplomatic presence in the U.S. could not be well explained by the liberal perspective without using the spatial model.
相似文献
| Lin Liu ([Summer Visiting Professor])Email: |
9.
Summary The question of alternative technologies for high-speed Internet access lies at the heart of rural development problems. In
this paper, we focus on one of those technologies, the system combining satellite technologies and Wi-Fi. Based on an empirical
study carried out in three rural areas, we analyze the dynamics of the use and appropriation of that technology by the companies
and organizations participating in the experiment. Considered both from a technical and social standpoint, the technology
‘in use’ appears here in its structuring dimensions.
相似文献
| Valérie FautreroEmail: |
10.
Over the past several decades, consumers in the global North have increasingly looked to fair or alternative trading systems
as a means to promote ecologically and socially sustainable agricultural production. While fair trade has historically been
limited to international commodity networks, US-based agro-food activists have recently turned their attentions towards building
a domestic movement, to bring fair trade principles and standards ‘home.’ Through an exploration of this growing movement,
we consider the potential for third party certification and labeling to incorporate social justice into US-based agricultural
production, with a particular focus on the implications for farm workers. We view current efforts to bring the principles
of fair trade to the domestic arena as a reflection of several interrelated developments: a growing need on the part of small
and mid-sized farmers to garner price premiums due to the erosion of the organic price premium; a recognition of the failure
of organic certification to advance a holistic vision of sustainability; and the strategic embrace of voluntary regulatory
mechanisms as an alternative to public regulation and collective bargaining. Initial research suggests that this has led to
particular framings of the domestic fair trade concept, which may undermine the movement’s ability to address the social relations
of agro-food production. Specifically, prioritization of the ‘family-scale’ farm and an undercurrent of food localism may
obscure farm workers’ role in valorizing the US agricultural landscape.
相似文献
| Christy GetzEmail: |
11.
Dmitry L. Lakshtanov Stanislav V. Sinogeikin Jay D. Bass 《Physics and Chemistry of Minerals》2007,34(1):11-22
The single-crystal acoustic velocities of α- and β-quartz were measured by Brillouin spectroscopy to a maximum temperature
>1,500°C at room pressure. From these velocities, the single-crystal elastic moduli were calculated up to 1,050°C, exceeding
the temperature range of previous measurements by 350°C for the elastic moduli and by 710°C for acoustic velocities. The ordinary
refractive index (n
o) of α- and β-quartz was measured from room temperature to 800°C. In the temperature interval from ∼950 to 1,000°C a subtle
change in the temperature derivative of the longitudinal acoustic velocity was observed in platelet geometry for all measured
directions. The high-temperature acoustic velocity data may indicate the presence of a second phase, presumably β-cristobalite,
that nucleates below 1,000°C.
相似文献
| Dmitry L. LakshtanovEmail: |
12.
Anthony John Christopher 《GeoJournal》2006,67(2):123-136
The pattern of Church of England dioceses has evolved over a period of 1,400 years. It reflects the practical response of
the Church to the changing political and demographic patterns of the country. No ideal size and form of diocese was ever devised
and few systematic attempts were made to achieve a degree of equity between them. The constitutional link between state and
church has inhibited change for the last 80 years, although society has changed significantly. Nevertheless, rapid constitutional
reforms, especially in the House of Lords, may be reflected in ecclesiastical reorganisation of the dioceses.
相似文献
| Anthony John ChristopherEmail: |
13.
Predicting environmental conditions to minimise salt damage at the Tower of London: a comparison of two approaches 总被引：1，自引：0，他引：1
Clifford A. Price 《Environmental Geology》2007,52(2):369-374
The paper compares the results of two studies of salt damage at the Wakefield Tower, Tower of London. The first, in 1993,
was based on semi-quantitative salt analysis and hygroscopicity measurements. The second was based on quantitative analysis
and a thermodynamic model, ECOS. Both studies aimed to predict environmental conditions that would minimise salt damage to
the interior stonework. Their predictions are markedly different, and this paper examines the reasons for the differences.
It is shown that hygroscopicity alone is not a reliable indicator of crystallisation from mixed salt solutions.
相似文献
| Clifford A. PriceEmail: |
14.
Dorian Speakman 《Natural Hazards》2008,44(1):111-127
A vulnerability index for the Fire Service in the UK has been designed to identify vulnerable locations during episodes of
severe floods. Taking recent case studies with the UK Fire Service, the patterns of vulnerability, in terms of demand on time
and resources, can be explained by investigating the environmental causes and their interaction with the adaptive capacity
of the response agencies.
相似文献
| Dorian SpeakmanEmail: |
15.
Spatial and temporal knowledge representation 总被引：1，自引：1，他引：0
Antony Galton 《Earth Science Informatics》2009,2(3):169-187
Knowledge Representation (KR) originated as a discipline within Artificial Intelligence, and is concerned with the representation
of knowledge in symbolic form so that it can be stored and manipulated on a computer. This article surveys that part of KR
that is concerned with the representation of space and time, with particular reference to the use of such representations
in geographical information science.
相似文献
| Antony GaltonEmail: |
16.
Today, various types of fair trade systems propose new forms of relationships between producers and consumers. If several
studies have provided accurate understandings of consumers’ motivations to buy fair trade products, the specific kinds of
consumer involvement that are emphasized in those systems remain partly unknown. In France, controversies about the regulation
and organization of fair trade with producers from Southern countries has led to broader debates about how consumers can best
express their solidarity with producers. In these debates local food networks are often portrayed as good examples of fair
trade and as having potential to redefine the role of the consumer in the marketplace (or in commercial relations). Based
on examination of the type of mechanisms used to enrol consumers in local and fair trade networks, we have distinguished two
main kinds of consumers’ involvement. The first one may be called “delegation” and is based on market mechanisms. The second
one is called “empowerment” and is based on contractual mechanisms between consumers and producers and on the construction
of collective choices. This latter kind of consumer involvement points out the capacity of alternative food networks to empower
consumers in a more broadly political sense.
相似文献
| Claire LamineEmail: |
17.
Space Physics Interactive Data Resource—SPIDR 总被引：1，自引：0，他引：1
Mikhail Zhizhin Eric Kihn Rob Redmon Dmitry Medvedev Dmitry Mishin 《Earth Science Informatics》2008,1(2):79-91
SPIDR (Space Physics Interactive Data Resource) is a standard data source for solar-terrestrial physics, functioning within
the framework of the ICSU World Data Centers. It is a distributed database and application server network, built to select,
visualize and model historical space weather data distributed across the Internet. SPIDR can work as a fully-functional web-application
(portal) or as a grid of web-services, providing functions for other applications to access its data holdings.
相似文献
| Mikhail ZhizhinEmail: |
18.
Sarah F. Ives 《GeoJournal》2009,74(3):245-255
Using a discussion of South African soap operas, I will place the idea of visuality in a discourse analysis that incorporates
a feminist epistemological lens, or an epistemology that integrates reflexivity and an acknowledgment of the dialogic nature
of visual media. Through this discussion, I will examine the possibilities that dialogism provides for unpacking and exploring
the politics of imperfect translation between the visual and the textual. These methodological interventions, I argue, will
help enrich discussions of the visual’s role in the contested realm of geographic imaginations and move beyond the distanced
position of the masculine gaze.
相似文献
| Sarah F. IvesEmail: |
19.
Tornado shelters and the manufactured home parks market 总被引：2，自引：2，他引：0
Manufactured or mobile homes represent a fast growing portion of the housing market but are particularly vulnerable to tornadoes.
In the US over 40% of tornado fatalities occur in mobile homes even though they comprise about 8% of US housing units. We
examine the market for tornado shelters in manufactured home parks in Oklahoma. Almost 60% of parks in the state have shelters,
with 90% of the shelters underground. Parks with shelters are not concentrated in urban areas but spread across the state,
with parks with shelters in 32 counties. We find that rents for lots in parks with shelters are 5–8% higher, which generates
sufficient revenue to approximately pay for shelters, but the point estimate is statistically significant in only one specification.
相似文献
| Daniel Sutter (Corresponding author)Email: |
20.
P. Mogilevsky 《Physics and Chemistry of Minerals》2007,34(3):201-214
The regular solid solution model has been applied to solid solubility in the monazite–xenotime systems and is verified against
the available experimental data for LaPO4–YPO4 and CePO4–YPO4 systems. The model is then used to predict the miscibility gaps in a number of other monazite–xenotime systems. The implications
for prospective two-phase monazite–xenotime fiber coatings for applications in ceramic matrix composites (CMCs) are discussed.
相似文献
| P. MogilevskyEmail: |