The main purpose of the present study was to investigate the differential effects of Computer Algebra Systems (CAS) and metacognitive training on mathematical reasoning. Participants were 83 students (boys and girls) who studied algebra in four eighth-grade classrooms randomly selected to four instructional methods: CAS embedded within metacognitive training (CAS + META), metacognitive training...

DESCRIPTION Update of the 1996 U.S. Preventive Services Task Force statement about screening for asymptomatic carotid artery stenosis (CAS) in the general population. METHODS The U.S. Preventive Services Task Force examined the evidence on the natural history of CAS; systematic reviews of the accuracy of screening tests; observational studies of the harms of screening and treatment of asympto...

UNLABELLED Forty-two children (29 boys and 13 girls), ages 3-10 years, were referred from the caseloads of clinical speech-language pathologists for suspected childhood apraxia of speech (CAS). According to results from tests of speech and oral motor skills, 22 children met criteria for CAS, including a severely limited consonant and vowel repertoire, difficulty sequencing syllables, and incons...

Résumé La synovite villonodulaire pigmentée (SVNP) est une prolifération bénigne rare de la synoviale des articulations, des bourses séreuses et des gaines tendineuses, d'étiopathogénie inconnue. Notre travail porte sur 20 cas de SVN du genou colligés à l'hôpital militaire Avicenne de Marrakech sur une période de 9 ans allant de janvier 2000 au décembre 2009 Il vise à identifier les spécificité...

BACKGROUND Effectiveness of carotid artery stenting (CAS) relative to carotid endarterectomy (CEA) among Medicare patients has not been established. We compared effectiveness of CAS versus CEA among Medicare beneficiaries. METHODS AND RESULTS We linked Medicare data (2000-2009) to the Society for Vascular Surgery's Vascular Registry (2005-2008) and the National Cardiovascular Data Registry's ...

BACKGROUND AND PURPOSE The chronological development and natural history of cerebral aneurysms (CAs) remain incompletely understood. We used (14)C birth dating of a main constituent of CAs, that is, collagen type I, as an indicator for biosynthesis and turnover of collagen in CAs in relation to human cerebral arteries to investigate this further. METHODS Forty-six ruptured and unruptured CA s...

Plants produce cyanide (CN2) during ethylene biosynthesis in the mitochondria and require b-cyanoalanine synthase (CAS) for CN2 detoxification. Recent studies show that CAS is a member of the b-substituted alanine synthase (BSAS) family, which also includes the Cys biosynthesis enzyme O-acetylserine sulfhydrylase (OASS), but how the BSAS evolved distinct metabolic functions is not understood. H...

POU transcription factors participate in cell-identity decisions during nervous system development, yet little is known about the regulatory networks controlling their expression. We report all known Drosophila POU genes require castor (cas) for correct CNS expression. drifter and I-POU depend on cas for full expression, whereas pdm-1 and pdm-2 are negatively regulated. cas encodes a zinc finge...

Cellular changes associated with oncogenic transformation are generally caused by deregulation of signal transduction pathways. We show that, in cells transformed by the v-crk oncogene, the adapter protein Cas forms a stable complex with the p85 regulatory subunit of phosphatidylinositol 3'-kinase (PI3K) coincident with the appearance of Cas-associated PI3K activity. The interaction between Cas...

Cancer-associated stroma (CAS) plays a key role in cancer initiation and progression. Spontaneously occurring canine mammary carcinomas are viewed as excellent models of human breast carcinomas. Considering the importance of CAS for human cancer, it likely plays a central role in canine tumours as well. So far, however, canine CAS lacks characterisation, and it remains unclear whether the biolo...