Distortions are often seen in the angular distribution of echo-power from VHF wind-profiling radars, suggesting that thin stable layers, within the air flow, are distorted and tilted from horizontal. In vertical shear of the horizontal wind, the distribution of the layer tilt angles becomes skewed. A case study using six days of VHF radar data and synoptic charts above western Europe indicates ...

The increasing technological sophistication of ship navigation systems may significantly alter the skills, knowledge, and strategies involved in navigating large ships. Many examples in other domains illustrate the dangers of technology-driven innovations. These examples show that without a systematic method to detect design flaws and training requirements, technology-driven designs may degrade...

This paper explores automatic segmentation of synthetic aperture radar (SAR) satellite images of sea ice. The investigation is based on a comparison of an automatically segmented SAR image and manual classifications by ice service analysts. The automatic algorithm uses statistical properties of the backscattered radar signals to segment the SAR image into a given number of classes. The numberof...

The estimation of convective precipitation and its contribution to total precipitation is an important issue both in hydrometeorology and radio links. The greatest part of this kind of precipitation is related with high intensity values that can produce floods and/or damage and disturb radio propagation. This contribution proposes two approaches for the estimation of convective precipitation, u...

Abstract To improve the consistency between evaluation results and actual situation of comprehensive energy system in low-carbon park, improved entropy weight algorithm is introduced to carry out design research method. Based on principles quantifiability, scientificity systematicness combined with operation development needs parks, index parks constructed. According process primary evaluation,...

The first eight papers accepted for the Special Issue on “Emerging Trends in Education” were published previously [1]. Here, we introduces the remaining eight papers, which cover quite a varied set of topics, encompassing online education, adaptive learning, student modeling and analytics, as well as gamification. For example, in “FORGE toolkit: leveraging distributed systems in eLearning platf...

When all of the one-sided specification indices each quality characteristic reach requirements process level, they can ensure that capability product meets level. This study constructs a fuzzy membership function based on upper confidence limit index, derives critical value, and then labels value axis visualized radar chart as well connects adjacent points to shape regular polygonal region. Nex...