The paper presents thoughts on Sustainable Data Infrastructure (SDI) development, and its user requirements bases. It brings Maslow's motivational theory to the fore, and proposes it as a rationalization mechanism for entities (mostly governmental) that aim at realizing SDI. Maslow's theory, though well-known, is somewhat new in geospatial circles; this is where the novelty of the paper resides...

To stimulate the Spatial Data Infrastructures (SDI) development effectively and efficiently, it is key to assess the progress and benefits of the SDI. Currently, several SDI assessment methods exist. However, these are still in an infant stage and none of these appear to meet the requirements of practitioners. As a result, SDI decision makers are still without any guidance on the performance of...

The enhancement of the ecological functions forests through stand structure optimization is a key issue for high-quality forestry and its sustainable development on Loess Plateau. In this study, fifty standard plots Pinus tabuliformis Carr. forest were established in Plateau western Shanxi, China. Eleven factors structure, three topographical factors, four functional indices function, including...

The past decades have witnessed the rapid growth of heterogeneous geospatial information systems. An important way to share these valuable assets is a spatial data infrastructure (SDI). Recent developments in Web Services and distributed geospatial information services provide a practical approach, Web Portals, to building a SDI. This article describes research, development, and challenges rela...

density, viscosity and refractive index of pure, binary and ternary mixtures of diethanolamine (dea) and methyl diethanolamine (mdea) with water have been measured at different temperatures from 288.15 k to 323.15 k at atmospheric pressure. also, this study presents the effects of mixture composition and temperature upon these thermo- physical properties. to measure the density and refractive i...

In the southeastern U.S. Coastal Plains, supplemental irrigation is required to reduce the impact of short‐term droughts and yield‐reducing plant water stress that can occur at least biennially. Sprinkler irrigation is commonly used to water agronomic crops in the region. Microirrigation is typically used for high value fruit and vegetable crops. In recent years and at some locations, microirri...

It is widely recognized that the long-term growth of forests benefits biomass carbon (C) sequestration, but it is not known whether the long-term growth of forests would also benefit soil C sequestration. We selected 79 representative soil profiles and investigated the influence of the forest stand age on the soil C dynamics of three soil layers (0-10, 10-20 and 20-30 cm) in temperate broadleav...

AIM To assess the prevalence of prolonged remission in Caucasian patients affected with systemic lupus erythematosus (SLE) and its relationship with damage accrual. METHODS Caucasian patients diagnosed with SLE between 1990 and 2009 and quarterly seen from 2009 to 2013 were included in the study. We defined remission as prolonged when lasting ≥5 consecutive years. Three levels of remission we...