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In the present study, a quasi-experimental pre-post test design was used to assess the effects of an argumentative writing strategy (POW+TREE) on the performance of grade five and six students of Greek origin who were learning English as a foreign language (EFL) in a Greek setting. The Self-Regulated Strategy Development (SRSD) cognitive apprenticeship model was utilized to improve the text composition skills of the students. In the experimental group (N=77), participants received instruction on general and genre-specific strategy use for planning and writing argumentative essays, on procedures to apply self-regulation (goal setting, self-monitoring, self- reinforcement, and self-instructions), and on establishing additional skills (vocabulary, grammar-drill instruction, good word choice, interesting openings etc.). The control group (N=100) was supported through a traditional curriculum in writing (focusing on spelling and grammar). Findings of the study showed that strategy instructed students wrote argumentative essays that were schematically stronger, qualitatively better, and longer than those produced by their counterparts in the control group.

This work presents the latest calibration results for the Copernicus Sentinel-3A and -3B and the Jason-3 radar altimeters as determined by the Permanent Facility for Altimetry Calibration (PFAC) in west Crete, Greece. Radar altimeters are used to provide operational measurements for sea surface height, significant wave height and wind speed over oceans. To maintain Fiducial Reference Measurement (FRM) status, the stability and quality of altimetry products need to be continuously monitored throughout the operational phase of each altimeter. External and independent calibration and validation facilities provide an objective assessment of the altimeter's performance by comparing satellite observations with ground-truth and in-situ measurements and infrastructures. Three independent methods are employed in the PFAC: Range calibration using a transponder, sea-surface calibration relying upon sea-surface Cal/Val sites, and crossover analysis. Procedures to determine FRM uncertainties for Cal/Val results have been demonstrated for each calibration. Biases for Sentinel-3A Passes No. 14, 278 and 335, Sentinel-3B Passes No. 14, 71 and 335, as well as for Jason-3 Passes No. 18 and No. 109 are given. Diverse calibration results by various techniques, infrastructure and settings are presented. Finally, upgrades to the PFAC in support of the Copernicus Sentinel-6 'Michael Freilich', due to launch in November 2020, are summarized. [ABSTRACT FROM AUTHOR]