A review of online platforms in training and surgical education

Introduction: The use of technology in surgical education has rapidly evolved. Blended learning refers to provision of online instruction platforms by international technology companies, prompting a combination of face-to-face teaching with computer-mediated tuition. This nonsystematic literature review focuses on online teaching platforms with applications for potential use in future surgical education.Methods: A literature search was performed using PubMed, Embase, OVID, and Google Scholar. To identify studies on online platforms in surgical education, the following search terms were used: “online platform,” “online learning,” “surgical education and online learning,” and “surgical education and blended learning.” The search was limited to citations in English from 1998 to 2018. The first author performed the detailed literature search. The final list of the articles was included by consensus between authors. Search items were studied from the nature of the articles, country of origin, date of publication, and aims and findings in relation to use of online platforms surgical education.Results: Altogether 279 relevant citations were reviewed, of which 22 articles met the inclusion criteria: 19 papers (ten original research, two review items, seven Internet articles) and three books were found to be relevant for this study. Their analysis comprised models of platforms along with their applications in surgical education. Data on the advantages and disadvantages of online platforms as well as authors’ personal experience of this instruction manner in surgical education were extracted. Problems with determining, analyzing, and integrating reading matters in a nonsystematic literature review comprising different teaching methods combined with the use of online platforms in surgical education were discussed and resolved.Conclusion: Online platforms were introduced by international technology companies to encourage paperless blended learning in schools. We envisaged the use of online classrooms in surgical education because of its simple format, easy access, low costs, and interaction-inspiring nature between teachers and students in professional surgical education.</p

Effects of composition and phase relations on mechanical properties and crystallisation of silicate glasses

Crystallization, mechanical properties and workability are all important for commercialization and optimization of silicate glass compositions. However, the inter-relations of these properties as a function of glass composition have received little investigation. Soda-lime-silica glasses with Na2O-MgO-CaO-Al2O3-SiO2 compositions relevant to commercial glass manufacture were experimentally studied and multiple liquidus temperature and viscosity models were used to complement the experimental results. Liquidus temperatures of the fabricated glasses were measured by the temperature gradient technique, and Rietveld refinements were applied to X-Ray powder diffraction (XRD) data for devitrified glasses, enabling quantitative determination of the crystalline and amorphous fractions and the nature of the crystals. Structural properties were investigated by Raman spectroscopy. Acoustic echography, micro-Vicker’s indentation and single-edge notched bend testing methods were used to measure Young’s moduli, hardness and fracture toughness, respectively. It is shown that it is possible to design lower-melting soda-lime-silica glass compositions without compromising their mechanical and crystallization properties. Unlike Young’s modulus, brittleness is highly responsive to the composition in soda-lime-silica glasses, and notably low brittleness values can be obtained in glasses with compositions in the wollastonite primary phase field: an effect that is more pronounced in the silica primary phase field. The measured bulk crystal fractions of the glasses subjected to devitrification at the lowest possible industrial conditioning temperatures, indicate that soda-lime-silica glass melts can be conditioned close to their liquidus temperatures within the compositional ranges of the primary phase fields of cristobalite, wollastonite or their combinations