scholarly journals Effect of Fixed Array AAC Graphic Symbols on Sentence Construction

2017 ◽  
Vol 22 (2) ◽  
pp. 341-351 ◽  
Author(s):  
Sangeun Shin
Keyword(s):  
Graphic Symbols ◽  
Sentence Construction ◽  
Fixed Array

Negative Evidence in Language Classroom Activities

2003 ◽  
Vol 141-142 ◽  
pp. 301-344 ◽  
Author(s):  
Teresa Pica ◽  
Gay N. Washburn
Keyword(s):  
English Language Learners ◽  
Language Learners ◽  
English Language ◽  
Matter Content ◽  
Negative Evidence ◽  
Academic English ◽  
Classroom Activities ◽  
Sentence Construction ◽  
Language Classroom ◽  
Subject Matter Content

This study sought to identify and describe how negative evidence was made available and accessible in responses to learners during two classroom activities: a teacher-led discussion, which emphasized communication of subject matter content, and a teacher-led sentence construction exercise, which focused on application of grammatical rules. Data came from adult, pre-academic English language learners during six discussions of American film and literature, and six sets of sentence construction exercises. Findings revealed little availability of negative evidence in the discussions, as students' fluent, multi-error contributions drew responses that were primarily back-channels and continuation moves. Greater availability and accessibility of negative evidence were found in the sentence construction exercises, as students were given feedback following their completion of individual sentences. Results from the study suggested several pedagogical implications and applications.

scholarly journals Whirlwinds and Hairpins in the Atmospheric Surface Layer

2016 ◽  
Vol 73 (12) ◽  
pp. 4927-4943 ◽  
Author(s):  
Steven P. Oncley ◽  
Oscar Hartogensis ◽  
Chenning Tong
Keyword(s):  
Surface Layer ◽  
Atmospheric Surface Layer ◽  
Dust Devils ◽  
Hairpin Vortices ◽  
Structure And Dynamics ◽  
Fixed Array ◽  
Visual Observations

Abstract Vortices in the atmospheric surface layer are characterized using observations at unprecedented resolution from a fixed array of 31 turbulence sensors. During the day, these vortices likely are dust devils, though no visual observations are available for confirmation. At night, hairpin vortices appear to have been observed. The structure and dynamics of several types of vortices are described and related to other vortex investigations, including tornadoes and hurricanes.

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