An increasing number of studies have confirmed that written corrective feedback (hereafter WCF) is vital for improving learners’ L2 writing. However, many scholars could not agree whether this improvement was due to direct, indirect, or both forms WCF. Thus, study first investigated the role WCF students’ writing achievement; it then if there a statistically significant difference in achievemen...

Prof. Pedro Planas of Spain initially developed PDTs,1 and Simoes11 adapted them for early prevention of anterior or posterior crossbite. PDTs should be used in the deciduous dentition only, as they cover the occlusal surfaces of the molars, resulting in a flat posterior occlusion until the molars are exfoliated. PDTs can be built in the laboratory using an indirect technique. A wax bite regist...

MANY ingenious closed or blind technics have been devised and enthusiastically advocated in the recent past for the surgical correction of mitral regurgitation. Invariably, success was transitory and such operations were short lived, to be replaced sinmilarly by others. During the past 3 years we have operated upon 82 patients with varying degrees of mitral insufficieney by the open-heart tech-...

We present a model for developing rule-based process servers with extensible syntax and semantics. New process enactment directives can be added to the syntax of the process modeling language, in which the process designer may specify specialized behavior for particular tasks or task segments. The process engine is peppered with callbacks to instance-specific code in order to implement any new ...