897 resultados para R12 - Size and Spatial Distributions of Regional Economic Activity
Resumo:
Resolution 676(XXXV) ECLAC calendar of conferences for the period 2015-2016 .-- Resolution 677(XXXV) Regional Conference on Women in Latin America and the Caribbean .-- Resolution 678(XXXV) Statistical Conference of the Americas of the Economic Commission for Latin America and the Caribbean .-- Resolution 679(XXXV) Support for the work of the Latin American and Caribbean Institute for Economic and Social Planning .-- Resolution 680(XXXV) Caribbean Development and Cooperation Committee .-- Resolution 681(XXXV) Regional Conference on Population and Development in Latin America and the Caribbean .-- Resolution 682(XXXV) Establishment of the Regional Conference on Social Development in Latin America and the Caribbean .-- Resolution 683(XXXV) Admission of Sint Maarten as an associate member of the Economic Commission for Latin America and the Caribbean .-- Resolution 684(XXXV) Programme of work and priorities of the Economic Commission for Latin America and the Caribbean for the 2016-2017 biennium .-- Resolution 685(XXXV) Activities of the Economic Commission for Latin America and the Caribbean in relation to follow-up to the Millennium Development Goals and implementation of the outcomes of the major United Nations conferences and summits in the economic, social and related fields .-- Resolution 686(XXXV) Application of Principle 10 of the Rio Declaration on Environment and Development in Latin America and the Caribbean .-- Resolution 687(XXXV) The regional dimension of the post-2015 development agenda .-- Resolution 688(XXXV) South-South cooperation .-- resolution 689(XXXV) Place of the next session .-- Resolution 690(XXXV) Lima resolution .-- Resolution 691(XXXV) Ministerial Conference on the Information Society in Latin America and the Caribbean.
Resumo:
This, the sixty-eighth edition of the Economic Survey of Latin America and the Caribbean, which corresponds to the year 2016, consists of three parts. Part I outlines the region’s economic performance in 2015 and analyses trends in the first half of 2016, as well as the outlook for the rest of the year. It examines the external and internal factors influencing the region’s economic performance and highlights some of the macroeconomic policy challenges that have arisen in an external context of weak growth and high levels of uncertainty. Part II analyses the challenges that the countries of Latin America and the Caribbean face at the domestic and international levels in mobilizing financing for development. On the domestic front, slower growth and tighter fiscal restrictions pose significant challenges for the mobilization of resources. Externally, the classification of many of the region’s countries in the middle-income category limits their access to concessional external financing or international support. Part III of this publication may be accessed on the web page of the Economic Commission for Latin America and the Caribbean (www.eclac.org). It contains the notes relating to the economic performance of the countries of Latin America and the Caribbean in 2015 and the first half of 2016, together with their respective statistical annexes. The cut-off date for updating the statistical information in this publication was 30 June 2016.
Resumo:
This study is aimed at determining the spatial distribution, physical properties, and groundwater conditions of the Vashon advance outwash (Qva) in the Mountlake Terrace, WA area. The Qva is correlative with the Esperance Sand, as defined at its type section; however, local variations in the Qva are not well-characterized (Mullineaux, 1965). While the Qva is a dense glacial unit with low compressibility and high frictional shear strength (Gurtowski and Boirum, 1989), the strength of this unit can be reduced when it becomes saturated (Tubbs, 1974). This can lead to caving or flowing in excavations, and on a larger scale, can lead to slope failures and mass-wasting when intersected by steep slopes. By studying the Qva, we can better predict how it will behave under certain conditions, which will be beneficial to geologists, hydrogeologists, engineers, and environmental scientists during site assessments and early phases of project planning. In this study, I use data from 27 geotechnical borings from previous field investigations and C-Tech Corporation’s EnterVol software to create three-dimensional models of the subsurface geology in the study area. These models made it possible to visualize the spatial distribution of the Qva in relation to other geologic units. I also conducted a comparative study between data from the borings and generalized published data on the spatial distribution, relative density, soil classification, grain-size distribution, moisture content, groundwater conditions, and aquifer properties of the Qva. I found that the elevation of the top of the Qva ranges from 247 to 477 ft. I found that the Qva is thickest where the modern topography is high, and is thinnest where the topography is low. The thickness of the Qva ranges from absent to 242 ft. Along the northern, east-west trending transect, the Qva thins to the east as it rises above a ridge composed of Pre- Vashon glacial deposits. Along the southern, east-west trending transect, the Qva pinches out against a ridge composed of pre-Vashon interglacial deposits. Two plausible explanations for this ridge are paleotopography and active faulting associated with the Southern Whidbey Fault Zone. Further investigations should be done using geophysical methods and the modeling methods described in this study to determine the nature of this ridge. The relative density of the Qva in the study area ranges from loose to very dense, with the loose end of the spectrum probably relating to heave in saturated sands. I found subtle correlations between density and depth. Volumetric analysis of the soil groups listed in the boring logs indicate that the Qva in the study area is composed of approximately 9.5% gravel, 89.3% sand, and 1.2% silt and clay. The natural moisture content ranges from 3.0 to 35.4% in select samples from the Qva. The moisture content appears to increase with depth and fines content. The water table in the study area ranges in elevation from 231.9 to 458 ft, based on observations and measurements recorded in the boring logs. The results from rising-head and falling-head slug tests done at a single well in the study area indicate that the geometric mean of hydraulic conductivity is 15.93 ft/d (5.62 x 10-03 cm/s), the storativity is 3.28x10-03, and the estimated transmissivity is 738.58 ft2/d in the vicinity of this observation well. At this location, there was 1.73 ft of seasonal variation in groundwater elevation between August 2014 and March 2015.
Resumo:
It has become increasingly commonplace to describe the United States as hegemonic. And yet, despite America's dominant position at a number of levels strategic, political-economic and ideational, there are plainly limits to US hegemony. These limits and the enduring strengths of American hegemony are revealed quite clearly in East Asia. This paper critically assesses a number of theories of hegemony, and argues that the concept continues to provide a useful way of conceptualising America's evolving relationship with East Asia. Theories of hegemony can, with appropriate caveats, also help us to understand the limits to Chinese and Japanese power in the region; two countries that are routinely cited as potential hegemonic rivals
Resumo:
Literature on the relationship between leadership and entrepreneurship as it applies to endogenous growth in a regional context is reviewed and used to explore a research agenda for work on this topic. A leadership/entrepreneurship analytical approach is developed and applied on a pilot basis to the Greater Washington D.C. region and its sub-parts. The results are assessed and used to further refine the model and to identify some of the more provocative policy implications of this work. The implications for regional planning process are also considered.
Resumo:
The spatial patterns of beta-amyloid (Abeta) deposits and neurofibrillary tangles (NFT) were studied in areas of the cerebral cortex in 16 patients with the late-onset, sporadic form of Alzheimer’s disease (AD). Diffuse, primitive, and classic Abeta deposits and NFT were aggregated into clusters; the clusters being regularly distributed parallel to the pia mater in many areas. In a significant proportion of regions, the sizes of the regularly distributed clusters approximated to those of the cells of origin of the cortico-cortical projections. The diffuse and primitive Abeta deposits exhibited a similar range of spatial patterns but the classic Abeta deposits occurred less frequently in large clusters >6400microm. In addition, the NFT often occurred in larger regularly distributed clusters than the Abeta deposits. The location, size, and distribution of the clusters of Abeta deposits and NFT supports the hypothesis that AD is a 'disconnection syndrome' in which degeneration of specific cortico-cortical and cortico-hippocampal pathways results in synaptic disconnection and the formation of clusters of NFT and Abeta deposits.
Resumo:
The objective was to test the hypothesis that the size frequency distributions of the prion protein (PrP) plaques in cases of variant Creutzfeldt-Jakob disease (vCJD) follow a power-law function. The design was a retrospective neuropathological study. The patients were 11 cases of clinically and neuropathologically verified vCJD. Size distributions of the diffuse and florid-type plaques were measured in several areas of the cerebral cortex and hippocampus from each case and a power-law function fitted to each distribution. The size distributions of the florid and diffuse plaques were fitted successfully by a powerlaw function in 100% and 42% of brain areas investigated respectively. Processes of aggregation/disaggregation may be more important than surface diffusion in the pathogenesis of the florid plaques. By contrast, surface diffusion may be a more significant factor in the development of the diffuse plaques. © Springer-Verlag Italia 2006.
Resumo:
The spatial patterns of the diffuse, primitive, and classic β-amyloid (Aβ) deposits were compared in cortical regions in early-onset familial Alzheimer's disease (EO-FAD) linked to mutations of the amyloid precursor protein APP) or presenilin 1 (PSEN1) genes, late-onset familial AD (LO-FAD), and sporadic AD (SAD). The objective was to determine whether genetic factors influenced the spatial patterns of the Aβ deposits. Aβ deposits were distributed either in clusters which were regularly distributed parallel to the pia mater or in larger, non-regularly distributed clusters. There were no significant differences in spatial pattern of the diffuse deposits between patient groups but mean cluster size of the diffuse deposits was larger in FAD compared with SAD. Primitive Aβ deposits were more frequently distributed in regular clusters and less frequently distributed in large clusters in FAD compared with SAD. Classic Aβ deposits were more frequently distributed in regularly spaced clusters and less frequently distributed in large clusters in LO-FAD compared with EO-FAD. There were no significant differences in the spatial patterns or cluster sizes of Aβ deposits in cases classified according to apolipoprotein E (APOE) genotype. These results suggest (1) greater deposition of Aβ in the form of clusters of diffuse deposits in FAD, (2) a greater proportion of diffuse deposits may be converted to primitive deposits in SAD, (3) classic deposits are more widely distributed in EO-FAD, and (4) the presence of APOE allele ε4 has little effect on the spatial patterns of Aβ deposits.
Resumo:
In Alzheimer's disease (AD) brain, beta-amyloid (Abeta) deposits and neurofibrillary tangles (NFT) are not randomly distributed but exhibit a spatial pattern, i.e., a departure from randomness towards regularity or clustering. Studies of the spatial pattern of a lesion may contribute to an understanding of its pathogenesis and therefore, of AD itself. This article describes the statistical methods most commonly used to detect the spatial patterns of brain lesions and the types of spatial patterns exhibited by ß-amyloid deposits and NFT in the cerebral cortex in AD. These studies suggest that within the cerebral cortex, Abeta deposits and NFT exhibit a similar spatial pattern, i.e., an aggregation of individual lesions into clusters which are regularly distributed parallel to the pia mater. The location, size and distribution of these clusters supports the hypothesis that AD is a 'disconnection syndrome' in which degeneration of specific cortical pathways results in the formation of clusters of NFT and Abeta deposits. In addition, a model to explain the development of the pathology within the cerebral cortex is proposed.