Acceptance and Use of E-Learning Based on Cloud Computing: The Role of Consumer Innovativeness

Cloud computing and E-learning are the inevitable trend of computational science in general, and information systems and technologies in specific.However, there are not many studies on the adoption of cloud-based E-learning systems. Moreover, while there are many papers on information system adoption as well as customer innovativeness, the innovativeness and adoption in the same model seems to be rare in the literature. The study combines the extended Unified Theory of Acceptance and Use of Technology (UTAUT2) and consumer innovativeness on the adoption of E-learning systems based on cloud computing. A survey was conducted among 282 cloud-based E-learning participants and analyzed by structural equation modeling (SEM). The findings indicate that the adoption of cloud-based E-learning is influenced by performance expectancy, social influence, hedonic motivation, and habit. Interestingly, although innovativeness is not significant to use intention, it has a positive effect on E-learning usage which is relatively new in Vietnam

Efeito da hidrocortisona sobre a lesão de reperfusão e reparação da mucosa após isquemia venosa experimental no jejuno de eqüinos Effect of hydrocortisone on reperfusion injury and on mucosal repair after experimental venous ischemia in the equine jejunum

Os efeitos do succinato sódico de hidrocortisona (SSH) nas lesões de isquemia e reperfusão no jejuno foram estudados em 12 eqüinos submetidos a isquemia total arteriovenosa e venosa no jejuno. Após uma hora de isquemia, seis eqüinos receberam 4,0mg/kg/IV de SSH (grupo T) e os demais receberam placebo (grupo NT). Foram colhidas amostras para avaliação histomorfológica após uma e duas horas de isquemia e uma, duas e 12 horas de reperfusão, sendo as alterações quantificadas por meio de escores. Os escores para infiltração de neutrófilos, edema e hemorragia foram equivalentes entre os grupos T e NT. No segmento submetido a isquemia venosa o agravamento da lesão na mucosa durante a reperfusão foi significativo (P<0,05) apenas no grupo NT, indicando que o SSH atenuou a lesão de reperfusão no jejuno. Após 12 horas de reperfusão os escores para lesão na mucosa na isquemia arteriovenosa foram equivalentes entre os grupos T e NT. Na isquemia venosa os escores foram significativamente menores no grupo T (P<0,01), indicando que o tratamento com SSH acelerou a reparação das lesões. Estes resultados indicam que o SSH pode ser utilizado como tratamento adjuvante de afecções isquêmicas e de reperfusão no eqüino.<br>In order to evaluate the effect of hydrocortisone sodium succinate (HSS) for treatment of intestinal ischemia-reperfusion, 12 halothane-anesthetized horses were subjected to both venous and arteriovenous ischemia of the jejunum. After one hour of ischemia, HSS (4.0 mg/kg/IV) was administered to six animals (T group). The other six horses received saline (NT group). Biopsy specimens were obtained after one and two hours of ischemia, and one, two and 12 hours after reperfusion. These samples were evaluated to assess the degree of mucosal damage and infiltration of neutrophils, hemorrhage, and edema. The scores for neutrophil infiltration, edema and hemorrhage did not differ between T and NT groups in both models of ischemia. However, in the jejunum subjected to venous ischemia, the scores for mucosal lesion increased significantly (P<0.05) after two hours of reperfusion only in the NT group, indicating that HSS prevented reperfusion injury. The scores for mucosal damage were equivalent after 12 hours of reperfusion following arteriovenous ischemia in T and NT groups. In contrast, mucosal lesion due to venous ischemia were more severe in the NT group (P<0.01), indicating that intestinal repair was stimulated by HSS. These results indicate that HSS may be used as an adjuvant for treatment of intestinal isquemia and reperfusion lesions in the horse

A critical review of cloud computing: researching desires and realities

Cloud computing has become central to current discussions about corporate information technology. To assess the impact that cloud may have on enterprises, it is important to evaluate the claims made in the existing literature and critically review these claims against empirical evidence from the field. To this end, this paper provides a framework within which to locate existing and future research on cloud computing. This framework is structured around a series of technological and service desires, that is, characteristics of cloud that are important for cloud users. The existing literature on cloud computing is located within this framework and is supplemented with empirical evidence from interviews with cloud providers and cloud users that were undertaken between 2010 and 2012. The paper identifies a range of research questions that arise from the analysis