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1.
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: |
2.
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: |
3.
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: |
4.
Identifying China’s leading world city: a network approach 总被引：3，自引：0，他引：3
This paper reports our research on China’s world cities. Formal network analysis of air passenger linkages for recent years
among China’s most populous cities and among many of the world’s largest cities allows us to identify the country’s leading
world city from among the leading Mainland candidates, Beijing, Shanghai and Guangzhou. We theorize our findings about China’s
world cities in relation to both global forces (and China’s increasing entanglement with them) and the policies and actions
of the national state. We examine the national and global urban network through a longitudinal, two-level analysis of airline
passenger travel for four time points between about 1990 and 2005. We show that Beijing was China’s leading world city at
the beginning of the time period, a status it lost nationally in as early as 1995, and then globally 10 years later. On the
other hand Shanghai became China’s leading world city, and it acquired this status first nationally in 2000, and then globally
in 2005. The changing status of the Chinese capital corresponds to the country’s increasing involvement with the capitalist
world economy. Shanghai’s ascendance as the leading world city in China may indicate that global forces have come to play
an increasingly important role relative to that of the developmental state.
相似文献
| Michael F. TimberlakeEmail: |
5.
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 |
6.
Post-Bam earthquake: recovery and reconstruction 总被引：3，自引：1，他引：2
This paper gives a brief explanation of the earthquake in Bam. It also reports on the rescue and relief operations, including
the construction of emergency shelters and temporary housing, and on the country’s plan for the reconstruction of the city,
which includes debris removal, the rebuilding of rural and urban residential and commercial units, the reconstruction of state
and public buildings and public facilities such as schools, rural and urban water aqueducts and grids, the construction of
a sewage system, power network and telecommunication system, the provision of water to orchards and farmlands, the renovation
of industries and the revival of the cultural heritage, particularly the historical Bam citadel, among others. We also report
briefly on the effect of the Bam earthquake on the Iran Earthquake Risk Reduction Strategy and actions.
相似文献
| Mohsen Ghafory-AshtianyEmail: |
7.
Some observations on the prediction of the dynamic parameters of debris flows in pyroclastic deposits in the Campania region of Italy 总被引：1，自引：0，他引：1
Over the last 20 years, many tools have been developed for the prediction of the post-failure behaviour of rapid landslides.
However, as pointed out by several researchers, knowledge may be improved by the performance of back-analyses using different
models and the evaluation of their reliability. This paper reports the back-analysis, conducted using numerical models, of
57 rapid landslides that have occurred in the Campania region. The back-analysis has been performed using the 2-D DAN_W code
(version 2003) with two different rheological models: the Voellmy and the frictional models. The latter has been immediately
discarded because it did not match the observed data. Instead, using the Voellmy model, the best-fit values of the parameters
(friction μ and turbulence ξ) for different types of flow (channelled, un-channelled and mixed flows) have been researched.
With these values a parametric study has been carried out on four representative slope profiles of the Campania region, enabling
the prediction of runout, velocity and depth of flow (dynamic parameters) of potential debris flows.
相似文献
| Anna Scotto di SantoloEmail: |
8.
9.
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: |
10.
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: |
11.
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: |
12.
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: |
13.
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: |
14.
David Havlick 《GeoJournal》2007,69(3):151-164
Since 1988, more than 20 US military bases have been redesignated as national wildlife refuges. In order to understand the
processes of these military-to-wildlife (M2W) conversions and their implications, I examine three logics that help to produce
these particular changes: Biodiversity, Brownfields, and Serendipity. These logics contribute to a broader discourse of ecological
militarization that frames military practices as compatible with and contributing to environmental protection. I focus on
the case of the Rocky Mountain Arsenal, Colorado, USA, to examine how these logics of conversion are mobilized into practice,
and what such changes mean as they bring militarism and environmental conservation together in reconfigured spaces.
相似文献
| David HavlickEmail: |
15.
José I. Barredo 《Natural Hazards》2007,42(1):125-148
There is a need for comprehensive, standardised and georeferenced information on floods for political and economic decision-making.
Relevant, accurate and up-to-date data is an important aspect for resource distribution, mitigation programmes, disaster monitoring
and assessment. Despite this, there is a lack of spatial and thematic accurate global data for floods. In Europe, historic
data on flood losses and casualties are neither comprehensive nor standardised, thus making long-term analyses at continental
level difficult. In this article, we present a map and catalogue of the major flood events of the last 56 years in the European
Union (EU), Bulgaria and Romania. This study is an effort to alleviate the lack of homogeneous and georeferenced information
on flood disasters for large periods in Europe. The objectives of this paper are to identify and classify the major flood
disasters of the last 56 years in the EU; to map the major flood disasters at pan-European scale with the support of a potential
flood hazard map and ancillary GIS datasets; and to give a picture of the current situation for major floods in the EU on
the basis of past events and current trends.
The Emergency Events Database (EM-DAT) of the Centre of Research on Epidemiology of Disasters in Brussels (CRED) and United
States Office for Foreign Disaster Assistance (OFDA) and NATHAN of Munich Re are two of the main public global databases for
natural disasters. Information from EM-DAT and NATHAN on flood disasters producing more than 70 casualties and/or more than
0.005% of EU GDP in damage has been assessed for the production of the map and catalogue of major flood disasters in Europe.
相似文献
| José I. BarredoEmail: |
16.
Mediterranean flash flood transfer through karstic area 总被引：1，自引：0，他引：1
Vincent Bailly-Comte Hervé Jourde Axel Roesch Séverin Pistre 《Environmental Geology》2008,54(3):605-614
Karstic aquifers influence flash floods propagation in Mediterranean countries. Near Montpellier, Southern France, discharge
data are recorded on the Coulazou River upstream and downstream of the Aumelas Causse. Two gauging stations are used to describe
the hydrodynamics of this binary karstic system. The first station characterizes the non-karstic catchment area. The second
one is representative of the karstic part of the watershed. Records since April 2004 are used to understand how the river
interacts with a karstic aquifer. Hydrograph analysis of three flash flood events is described. Corresponding discharge time
series recorded at the two gauging stations are used to describe the modification of the hydrographs by auto- and crosscorrelations
analyses. Finally, linear system analyses are used to provide the transfer functions of this binary karstic system according
to the three flood events characteristics (initial conditions, volume, spatial distribution of rainfall, etc.). Theses functions
summarize the hydrodynamic behaviour of the system: their shapes are indicative of the dynamics of the storage, the release
and the contribution to surface waters.
相似文献
| Vincent Bailly-ComteEmail: |
17.
Catherine Hesse-Swain 《GeoJournal》2006,66(3):257-272
People living in the northeast of Thailand interchangeably label themselves and are labelled by others as Isan, Thai Isan,
Lao Isan, Thai or Lao, depending on the ethnic, political, social or familial nuances of any given situation. I use the term
Lao Isan to refer specifically to Isan people of Lao origin or ethnicity. Lao Isan are subject to complex and often competing notions
of Isan-ness, Lao-ness and Thai-ness by insiders and outsiders. Using data derived from an ethnographic study of popular Thai television and Lao Isan youth (aged
17–25) living in the city of Khon Kaen and the town of Mahasarakham in northeast Thailand in 2002, this paper explores contemporary
and co-existing interpretations of Isan identity or Khwampenisan among Lao Isan youth in relation to self-image and connections with national understandings of physical beauty as they are
perpetuated in Thai-produced television programs.
相似文献
| Catherine Hesse-SwainEmail: |
18.
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: |
19.
The aim of this paper is to use an economic framework to derive decision making rules for river basin management with a focus on groundwater resources. Using an example from northern Nigeria, the paper provides an example of how decision making for sustainable water resources management may be facilitated by comparing net benefits and costs across a river basin. It is argued that economic tools can be used to assess the value of water resources in different uses, identify and analyze management scenarios, and provide decision rules for the sustainable use and management of surface and ground water resources in the region.
相似文献
| Gayatri AcharyaEmail: |
20.
This paper presents an examination of the timescale of phase transition behaviour of a series of salts known to cause damage
to wall paintings and other cultural property. The rate of deliquescence and crystallisation of single salts (nitromagnesite
and halite) under different RH regimes, and the extent to which this was affected when mixed with other salts (niter, nitratite
and gypsum), was investigated. The study was conducted using simple conventional techniques (mass measurements over time)
and also using an innovative new method: timelapse video imaging with online data annotation. The results demonstrate the
synergy gained from combining video imaging with environmental data in reference to time in the study of salt phase changes:
where it revealed new information concerning the kinetics of deliquescence and crystallisation. The implications of these
results for the implementation of environmental control measures within historic buildings are discussed.
相似文献
| Alison SawdyEmail: |