The OLES survey was administered during 20 and the data from three case study classes using e-learning in Hong Kong and Australia are presented. instrument very easy to use and the results can be viewed immediately providing educators using e-learning with a mechanism to adjust their teaching and enhance the learning environment. The Online Learning Environment Survey (OLES) instrument was developed using online technologies, including a web-based survey format and an SQL database where the data is instantly captured, analysed and viewed via the data screen or the charting screen. This paper reports on the findings from research that uses a tool to help educators assess their e-learning environment. Instituto Politécnico de Viana do Castelo PROJETOS DE I&DT EMPRESAS EM COPROMOÇÃO :: COVID-19 The device can be placed in nursing homes, above the beds where patients rest, allowing the continuous acquisition of data and its processing without any type of contact and invasiveness. This project aims to design a low-cost contactless IoT edge device for real-time vital signs monitoring (cardio-pulmonary rates and body temperature) using a multimodal approach based on state-of-the-art Doppler radar techniques and IR thermal imaging. On the other hand, contactless vital signs monitoring using radar-based techniques, or IR-thermal imaging, do not require the attachment of physical electrodes and is of great value for the elderly population in the specific context of nursing houses, because it removes the need of using wires, being more comfortable and less invasive for the patients. require the use of contact sensors that need to be precisely attached by a health professional, are less convenient for repeatable measurements, and not practical for long-duration monitoring. Continuous monitoring of vital signs, such as body temperature and cardio-pulmonary rates, can be crucial in early detection and prediction of the COVID-19 disease, that rapidly progress and particularly affect this population group.Ĭonventional clinical methods used for monitoring vital signs are contact-based, i.e. Synthesis: In the context of a pandemic situation such as the one we are currently experiencing with COVID-19, the need for continuous, accurate, and real-time monitoring of the health conditions of groups at risk, such as the elderly, is crucial, due to the fast spread of the disease and the need to act quickly to contain its evolution. Reinforce research, technological development and innovation The responses to the survey reaffirmed the belief that solutions to problems involving concepts that can be challenging to grasp are learned more effectively when the steps of the solution are associated with processing modules comprising clearly defined input-output relationships. The students taking the course completed an on-line survey to rate the effectiveness of the Matlab tool in solving the two-stub transmission line problem. Furthermore, the computations are more accurate and the results can be displayed and interpreted in a more effective manner. This modular approach using Matlab enhances the studentspsila understanding of the Smith chart technique as a solution process with the specific objectives of each module clearly identified. These steps can be implemented as modules written in Matlab scripts. The paper restates the solving techniques of a two-stub Smith chart problem in terms of a process consisting of steps. Matlab provides a powerful computation and display platform by means of which fundamental and advanced concepts relating to transmission lines can be understood and implemented. This paper specifically presents a Matlab-based teaching approach to the two-stub Smith chart problem that is typically covered in an undergraduate course on electromagnetic fields. The Smith chart illustrated in figure 4 has also other auxiliary scales useful for the determination of some parameters like for example, the VSWR, the amplitudes of the reflection and transmission coefficients, the return loss in dB etc. It can also be used to determine distances, toward the load or toward the generator, expressed in degrees bearing in mind that a distance of /2 corresponds to 360°. The innermost scale is a protractor (in degrees) and is primarily used to determine the phase of the reflection coefficient and the phase of the transmission coefficient. The outermost scale is used to determine distances in wavelengths toward the generator and the next scale is used to determine distances in wavelengths toward the load. The main difference between this chart and the basic Smith chart shown in figure 2 is the existence of three scales around the periphery. Nowadays, the Smith chart appears in several different types. Some important features of a Smith chart.
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