As international concern for the survival of deltas grows, the Mekong River delta, the world's third largest delta, densely populated, considered as Southeast Asia's most important food basket, and rich in biodiversity at the world scale, is also increasingly affected by human activities and exposed to subsidence and coastal erosion. Several dams have been constructed upstream of the delta and ...

Enamel white spot lesions are frequent and can impact patients' quality of life. The most conservative treatment in such cases is microabrasion, a technique that presents some drawbacks. The proposed strategy is not based on the elimination of dysplastic enamel, but on masking the lesion by infiltrating the porous subsurface enamel with a hydrophobic resin that has a refraction index closer to ...

Corporate probability of default (PD) prediction is vitally important for risk management and asset pricing. In search accurate PD prediction, we propose a flexible yet easy-to-interpret default-prediction single-index hazard model (DSI). By applying it to comprehensive U.S. corporate bankruptcy database constructed, discover an interesting V-shaped relationship, indicating violation the common...

introduction soil losses and erosion is one of the main causes of fertility decreasing, sedimentation in river cannels and irrigation canals, decreasing of storage capacity in dams, increasing of floods frequency, environmental pollution and it prevents from stable development. more than 70% of iran land is covered with arid and semi-arid areas. soil erosion as one of the main causes of soil de...

Single-index models are becoming increasingly popular in many scientific applications as they offer the advantages of flexibility regression modeling well interpretable covariate effects. In context survival analysis, single-index hazards natural extensions Cox proportional models. this paper, we propose a novel estimation procedure for hazard under monotone constraint index. We apply profile l...

The concept of connectivity and its index have been widely discussed applied to environmental studies such as ecology, hydrology, geomorphology hydrosedimentology. Supposing that this is very useful also in disaster risk management, we define the hazard associated debris flows degree between flow occurrence (trajectory) point interest (location house, person, so on). Based on definition, Hazard...