This study examined the construct validity of the e-rater automated essay scoring engine as an alternative to human scoring in the context of TOEFL essay writing. Analyses were based on a sample of students who repeated the TOEFL within a short time period. Two e-rater scores were investigated in this study, the first based on optimally predicting the human essay score and the second based on e...

the purpose of this study was to investigate two different techniques for testing reading comprehension questions. differences are measured by two different types of questions including inferential and referential questions. to answer the referential questions, the reader is required to move beyond the level of sentence comprehension and understand the relationship among the sentences. while, i...

The interaction between isatin-β-thiosemicarbazone (IBT) and calf thymus DNA (CT-DNA) was investigated in physiological buffer (pH 7.4) using Neutral Red (NR) dye as a spectral probe by UV-Vis absorption and fluorescence spectroscopy, as well as viscosity measurements. The IBT is stabilized by intercalation in the DNA (K [IBT -DNA] = 1.03×10(5) M(-1)), and displaces the NR dye from the NR-DNA co...

Vaccinia virus antigens, in HeLa cells treated with the antipox virus drug isatin beta-thiosemicarbazone (IBT), were analyzed by immunoprecipitation, followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The total radioactivity in the immunoprecipitate was decreased to almost 50% in the presence of the drug as compared to its absence. An inhibition also occurred with an IBT-dep...

AIMS To describe our institutional experience with high dose rate (HDR) interstitial brachytherapy (IBT) compared with previously reported results on the low dose rate (LDR) practice for head and neck cancer. MATERIALS AND METHODS Eighty-four patients with oral cavity (n=70) or oropharyngeal cancer (n=14) were treated with 192Ir HDR-IBT. Seventy-eight patients had stage I or II tumour. The pa...