Integrity is an attribute of the quality of performance of a positioning technology that is getting crucial for many Intelligent Transportation Systems dealing with safety. Managing the confidence in estimated locations is difficult when operating in complex outdoors environments, particularly for Global Navigation Satellite Systems (GNSS). A common integrity process consists in removing outlie...

JPALS (Joint Precision Approach and Landing System) is a precision landing system that provides LAAS (Local Area Augmentation System) like capabilities in a military operating environment. This paper discusses the landbased JPALS application and the enhancement of a selection algorithm called EXM (Executive Monitor). The EXM examines the pass/fail outputs of other monitors to define a common se...

Changes in surface land use may threaten groundwater quality and ecosystem integrity, particularly in shallow aquifers where links between groundwater and surface activities are most intimate. In this study we examine the response of groundwater ecosystem to agricultural land uses in the shallow alluvial aquifer of the Gwydir River valley, New South Wales, Australia. We compared groundwater qua...

human activities induced changes in land cover/use have extensive impacts on the landscape. in recent years, these changes had an increasingly growth due to irrational use of the natural resources in iran. hence, considering the negative effects of the inappropriate use of land and land-use change, understanding of the landscape changes over time is necessary to planning and implementation of s...

The relative importance of agricultural land retirement on water quality and aquatic-community health was investigated in the Minnesota River Basin. Eighty-two sites, with drainage areas ranging from 4.3 to 2200 km, were examined for nutrient concentrations, measures of aquatic-community health (e.g., fish index of biotic integrity [IBI] scores), and environmental factors (e.g., drainage area a...

Sustainable management of coastal mangrove systems requires up-to-date data on land use and land cover information. The objective of this study was to use Landsat Thematic Mapper (TM) and the Enhanced Thematic Mapper Plus (ETM+) remote sensing information to provide such management data and corresponding analysis. This study showed that the degradation of Ghana’s mangroves was due primarily to ...

Urbanization compromises the biotic integrity and health of streams, and indicators of integrity loss are needed to improve assessment programs and identify mechanisms of urban effects. We investigated linkages between landscapes and assemblages in 31 wadeable Piedmont streams in the Etowah River basin in northern Georgia (USA). Our objectives were to identify the indicators of macroinvertebrat...