REF Codes: Intermediate Performance Oriented Fountain Codes With Feedback

2020 ◽  
Vol 69 (11) ◽  
pp. 13148-13164
Author(s):  
Jin Shang ◽  
Wenjun Xu ◽  
Chia-Han Lee ◽  
Xin Yuan ◽  
Ping Zhang ◽  
...  
2020 ◽  
Vol 68 (9) ◽  
pp. 5313-5325
Author(s):  
Jingxuan Huang ◽  
Zesong Fei ◽  
Congzhe Cao ◽  
Ming Xiao

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Nerea Fernández Ros ◽  
Felipe Lucena ◽  
Mercedes Iñarrairaegui ◽  
Manuel F. Landecho ◽  
Patricia Sunsundegui ◽  
...  

Abstract Background Active learning strategies such as formative assessment through clinical cases may help to get a deeper learning. We have studied the effect of this kind of online formative assessment in pathophysiology teaching. Methods Seven brief clinical cases were used to give formative assessment in the first semester of a pathophysiology course. To evaluate its effect on learning, we analyzed the proportion of students that passed the end of semester exam with a score above 60 over 100. We also analyzed the effect of the intervention according to the students’ previous academic performance. Results Ninety-six students participated in the study and sat the exam. Sixty-five of them passed it. Students that passed the exam had a higher previous academic performance and had done a higher number of exercises of formative assessment, both in univariate and multivariate analysis. The participants were divided in three groups, according to their previous academic performance. In the intermediate group, the number of cases done by the students who passed the exam was significantly higher than in those who did not pass it (median: 4 versus 0; P = 0.009). Conclusion Formative assessment through web-based clinical cases was followed by an improvement of the academic results in pathophysiology, mainly in students with intermediate performance.


Author(s):  
F. E. H. Spicer

The Institute of Petroleum has recently published a test method (IP 220/67) for assessing the rust-prevention characteristics of greases. Specially selected and preserved double-row, self-aligning ball bearings are used as test specimens. The test, which lasts for 164 1/2 h, is dynamic, the grease film being produced and part of the test being performed with the bearings rotating partially submerged in distilled water. The performance of the grease is assessed by estimating the area of rust on the outer races of the test bearings. The precision of the test method was established by an extensive international correlation programme involving 30 laboratories from five European countries. This showed a precision which varied according to the performance level of the test greases. The results of tests with greases affording very good protection and with greases affording very poor protection against rusting gave better precision than results from greases with intermediate performance levels.


2012 ◽  
Vol 68 (1) ◽  
pp. 59-77 ◽  
Author(s):  
Paweł Korus ◽  
Jarosław Białas ◽  
Andrzej Dziech

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