57 research outputs found
Online collaboration and cooperation : the recurring importance of evidence, rationale and viability
This paper investigates collaboration in teaching and learning and draws out implications for the promotion of collaboration within online environments. It is divided into four sections. First the case for collaboration, including specifically cooperative approaches, is explored. This case revolves around the impact of collaboration on the quality of learning and on learning outcomes. Collaboration is seen as constrained by context but, if structured and rewarded, it will bring important motivational and cognitive benefits. Next, the case for online collaboration is examined. This is based on longstanding arguments about the benefits of working together albeit in an environment which offers greater reach; a mix of media; and archives of interaction. The third section of the paper compares perspectives on online collaboration with a longer tradition of research into collaboration in general; it critiques the idea that online mediation offers a paradigm change in teaching and learning. The fourth section of the paper considers future directions for promoting online collaboration
Molecular mechanisms of severe acute respiratory syndrome (SARS)
Severe acute respiratory syndrome (SARS) is a new infectious disease caused by a novel coronavirus that leads to deleterious pulmonary pathological features. Due to its high morbidity and mortality and widespread occurrence, SARS has evolved as an important respiratory disease which may be encountered everywhere in the world. The virus was identified as the causative agent of SARS due to the efforts of a WHO-led laboratory network. The potential mutability of the SARS-CoV genome may lead to new SARS outbreaks and several regions of the viral genomes open reading frames have been identified which may contribute to the severe virulence of the virus. With regard to the pathogenesis of SARS, several mechanisms involving both direct effects on target cells and indirect effects via the immune system may exist. Vaccination would offer the most attractive approach to prevent new epidemics of SARS, but the development of vaccines is difficult due to missing data on the role of immune system-virus interactions and the potential mutability of the virus. Even in a situation of no new infections, SARS remains a major health hazard, as new epidemics may arise. Therefore, further experimental and clinical research is required to control the disease
An evaporation-free solid-phase extraction method for rapid and accurate analysis of sumatriptan in human plasma by LC–MS/MS
Differential effect of griseofulvin on interferon-γ-induced HLA-DR and intercellular adhesion molecule-1 expression of human keratinocytes
Selenite inhibition of Coxsackie virus B5 replication: implications on the etiology of Keshan disease
As funções dos Restos Epiteliais de Malassez, o EGF e o movimento ortodôntico ou Por que o movimento ortodôntico não promove a anquilose alveolodentária? ERM functions, EGF and orthodontic movement or Why doesn't orthodontic movement cause alveolodental ankylosis?
In Vitro Antimicrobial Activity and the Mode of Action of Indole-3-Carbinol against Human Pathogenic Microorganisms
- …