The development of a network ground-based telescopes requires detailed astroclimatic studies. This paper presents the spatial distributions precipitable water vapor (PWV), total cloud cover (TCC) and base height (CBH). With aim representative description vapor, method for correcting this characteristic which takes into account underlying surface is proposed. uses exponential decrease in content...

Previous research has shown that local scour at bridge piers is severely increased by the accumulation of woody debris around piers. However, due to unavailability accurate information regarding characteristics formed jams, shape and dimensions accumulations tested in previous laboratory experiments have had be assumed. This article provides an assessment debris-induced based on recently availa...

This qualitative study followed the development of 94 pre-service teachers’ assessment perceptions in an introductory course on student assessment. Analysis students’ retrospective and end identified five dimensions. Considerable shifts were detected each dimension: from summative to formative assessment, negative positive perceptions, perceiving as a simple concept complex multifaceted one, hi...

Abstract This study presents the results of 32 laboratory experiments on local scour at a single pile and 1 × 4 group for both uniform non-uniform sediments under clear water conditions. The present aims to evaluate effects different sediment beds made up mixtures sand gravel (four-bed configurations) in d 50 (1–3.5 mm) gradation (1.4–3) ranges depth flow discharges depths. Further, findings ar...