Submitted by Liliane Ferreira (ljuvencia30@gmail.com) on 2018-06-04T12:50:56Z No. of bitstreams: 2 Dissertação - Giuliana Thaíse Araújo da Silva - 2018.pdf: 1677560 bytes, checksum: fe8891f1722a8a10846220a3a8f2a5e9 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-06-04T13:54:50Z (GMT) No. of bitstreams: 2 Dissertação - Giuliana Thaíse Araújo da Silva - 2018.pdf: 1677560 bytes, checksum: fe8891f1722a8a10846220a3a8f2a5e9 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2018-06-04T13:54:50Z (GMT). No. of bitstreams: 2 Dissertação - Giuliana Thaíse Araújo da Silva - 2018.pdf: 1677560 bytes, checksum: fe8891f1722a8a10846220a3a8f2a5e9 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-05-03 / The Light Emitting Diode (LED) is a semiconductor device that emits light source and can be used as a tissue modeler by means of the transformation of received photons. Photobiomodulation therapy (PBMT) is a specific term for the therapeutic application of light and acts as therapy, analgesia and anti-inflammatory. The objective of this work was to verify the effectiveness of LED at fixed time in the stimulation of fibroblasts. For this purpose, the L929 cell line submitted to LED irradiation (630 nm) was used, in triplicate, at the potency of 50, 75 and 100 mW, for five seconds and compared with non-irradiated control group. Next, cell viability, proliferation, nitric oxide production and collagen synthesis were observed. The results revealed that there was no cytotoxicity after 24, 48 and 72 hours of irradiation; there was an increase in the production of nitrite between the group of 72 hours and the other experimental groups and increase in the synthesis of collagen, directly proportional to the potencies used. Thus the irradiation allowed the fibroblastic stimulation with increased activity in the healing process. / O Diodo Emissor de Luz (Light Emissor Diode - LED) é um dispositivo semicondutor que emite fonte de luz e pode ser usado como modelador tecidual por meio da transformação de fótons recebidos. A fotobiomodulação (Photobiomodulation therapy - PBMT) é um termo específico para aplicação terapêutica da luz e atua como analgesia e anti-inflamatório. O objetivo deste trabalho foi de verificar a efetividade do LED em tempo fixo na estimulação de fibroblastos. Para tanto, utilizou-se a linhagem celular L929 submetida à irradiação LED (630 nm), em triplicata, nas potências de 50, 75 e 100 mW, por cinco segundos e comparou-se com grupo controle não irradiado. Em seguida, observou-se a viabilidade celular, proliferação, produção de óxido nítrico e síntese de colágeno. Os resultados revelaram que não houve citotoxicidade após 24, 48 e 72 horas de irradiação; houve aumento na produção de nitrito entre o grupo de 72 horas e os outros grupos experimentais e aumento na síntese de colágeno, diretamente proporcionais às potências utilizadas. Assim a irradiação possibilitou a estimulação fibroblástica com aumento de sua atividade no processo de cicatrização.

The unique contribution to knowledge of this research is the study of the development of judgement capacity in apprentice and undergraduate engineering learners in Activity Led Learning (ALL) environments. Four case studies of engineering students investigated the learners' experiences of making judgements in various engineering undergraduate and apprenticeship programmes. A phenomenological research methodology was used to infer the learner's judgements from the learners' dialogues and actions that were observed during the learning activity. The findings of the study indicate that the experience and incidence of the learners' exertion of judgement is dependent upon the construct of the ALL environment to provide a problem space with potential for disjuncture, and the intentionality of the learners. The learners did not solve problems by a linear progression but repeatedly re-activated experiences and knowledge, exercising judgements until the states of disjuncture were satisfied leading to the conclusion of the problem. Heuristic judgements that may result in decision making errors tended to dominate the problem spaces though their incidence did not appear to be influenced by the technical or socio-technical demands of the project problem spaces. This thesis concludes that in ALL environments, projects of sufficient length and complexity similar to realistic professional practice, may enable students to acquire the practice of better judgement through disjuncture and by re-activating learning experiences and importing analogies into new problem spaces. However, to acquire skills and knowledge to improve judgement capacity, requires specific and purposeful interventions within ALL that enable the learner to know when heuristic judgements are reliable or otherwise unreliable, and acquiring reasoning strategies to compensate for the effects. It is proposed that in such interventions the learner learns to record their own judgements as they are exerted and to reflect critically on those judgements and their consequences. It also requires that any ALL project that aims to promote judgement capacity has in place assessment instruments that specifically consider the learner effort in the self-development of judgement.

Class of 2013 Abstract / Specific Aims: To assess the effect of a pharmacist-led education group on psychiatric patient-reported attitudes, knowledge, and confidence in self-managing medications. The reliability and validity of the questionnaire given to patients who attended a pharmacist-led medication education group was also evaluated. Methods: A retrospective pre-post questionnaire was distributed patients and collected variables collected including patient self-reported medication knowledge and attitudes, demographics, previous psychiatric hospitalizations, length of group attended, and outpatient pharmacist relationships. Knowledge and attitude items were measured on a 4-point Likert-type scale with response options ranging from “agree” to “disagree.” Rasch analysis was conducted to ensure all items measured the same construct and the probability of the person responding to an item was not dependent on other assessment items. Rasch measurement includes several diagnostic indices that allow item-specific and person-specific examinations of data reliability and measurement fit. In addition, the Rasch technique makes it possible to evaluate the contribution of each person’s measures on each item. A z-test was used to evaluate for instrument content gaps and a dependent t-test was performed to measure for statistical differences before and after the intervention. Main Results: Sixty patients responded to the Medication Attitude and Knowledge Questionnaire over a 16-week period. Gaps identified were not statistically significant (p=0.1064 and 0.5305) indicating that content validity is comprehensive. On a group level, no significant differences were identified in patient answers before and after the intervention (p=0.2162, p=0.8292). When each patient was analyzed separately, only one patient out of 60 showed a significant difference in answers after the intervention. Results also demonstrated that after attending a group, 100% of patients indicated they intended to adhere to their medication regimen post-discharge. Conclusion: This evaluation was unique because patient attitudes were explored before and after medication education group attendance. Medication Attitude and Knowledge items were valid and reliable.

Magister Artium (Development Studies) - MA(DVS) / In line with neoclassical economic growth propositions that outward-orientation fosters economic growth, since independence from Britain in 1964 the Government of Malawi has placed international trade at the centre of its economic development agenda. In spite of this theoretical affirmation of the trade-growth relationship, some empirical studies that have been done both in the country and abroad show contrary results. This prompted this study to be undertaken with the aim of assessing the impact of exports and imports on economic growth in Malawi from 1970 to 2010.This study has used a neoclassic economic growth model containing gross domestic product, exports, imports, capital and labour force as variables of analysis. After collecting annual time series data on the variables for the period 1970 to 2010 from the World Bank online statistical data base, Ordinary Least Squares regression and several econometric tests were run on the model to ensure robust and accurate results. Statistical accuracy of the findings was further cemented by use of the 5 percent level of significance. Exports were found to have a positive and statistically significant effect on the country’s economic growth, while imports had a negative and insignificant influence. Similarly, capital and labour force showed a positive effect on economic growth even though the capital’s effect was statistically insignificant. Nevertheless, the study also strongly confirmed the presence of a long-run equilibrium among the variables. The above results strongly suggest that Malawi should continue with its export-led economic growth strategies such as the Economic Recovery Plan (ERP) and the Malawi Growth and Development Strategy (MDGS). However, if the two economic development plans are to bear fruit this study strongly urges Malawi to consider diversifying its economy away from primary export production and instead embark on value-addition. Furthermore, the country should not only reduce the importation of consumer goods in favour of capital goods, but also improve the quality of the labour force and capital formation, if Malawi is to realise its economic development and poverty alleviation aspirations.

Reducing the consumption of electricity is one of the principal areas of current research into energy saving technologies. Within this area is the effort to reduce the demand for electricity for lighting purposes. To consider just the domestic requirements, during 2011 domestic electricity consumption in the UK was 30% of a total electricity demand of 374TWh. Of this figure of 112TWh some 13TWh were used for lighting alone. This thesis describes research made in this area, in particular the manufacture of lighting luminaires making use of High Brightness Light Emitting Diodes (HBLEDs). The thesis outlines and demonstrates a methodology for the design, testing and subsequent manufacture of complete luminaires which make suitable, low energy consumption alternatives to conventional lighting using filament lamps and fluorescent fittings. Work has been done in the areas of:Thermal management, Power supply design, Luminaire design, Performance simulation in software, 'Remote phosphor’ luminaires in which LEDs with blue light outputs are used to provide blue light which is converted to usable white light by phosphor laden acrylic plates employed in luminaires for both wavelength conversion and light diffusion, Luminaire performance measurementIt is shown that substantial savings in energy (over 50%) can be made by using HBLEDs in lighting luminaires whilst producing satisfactory lighting for a variety of purposes.

Industrial heritage and urban regeneration: New perspectives for the district of Atlampa in Mexico City Abstract in English The relationship between cities and industry has been the subject of research ever since the process of industrialization began in the 18th century. The interest around it has only grown once industry started leaving urban centers in the mid 20th century, forcing cities to evolve to fulfill new functions. This posed a challenge to urban planners and heritage professionals, who had to find solutions together to preserve important industrial sites without restraining the city from evolving. The present thesis explores the different approaches commonly used to address this challenge and analyzes their feasibility for the case of Atlampa, a historical industrial district in Mexico City that has stagnated for decades despite showing great urban potential and heritage value. The core of the thesis is a comparative study of former industrial districts with similar circumstances, which were identified through a diagnosis of Atlampa. The comparison analyzes the urban planning and heritage conservation approaches in each case and determines what could be a feasible and desirable strategy for the urban regeneration of Atlampa. Key words industrial heritage - urban regeneration - urban heritage -...

The thesis focuses on the design of hardware and software prototype of adaptive automotive rear-lighting. Hardware includes a control module and LED module with 150 high brightneess light emitting diodes. These diodes are serve as an adaptive backlight for color LCD display. The device Raspberry Pi 3 was selected as the control element. This device insludes the support of all communications buses which are used in this thesis.

This thesis deals with the front LED headlamps in the automotive industry. This paper describes the supply options and how to control these headlamps. The theoretical part describes the parameters and communication interfaces of the NCV78343 device. The practical part is divided into three chapters. The first chapter focuses on the design of the evaluation platform, the functional blocks and the configuration options. The second chapter deals with the implementation of the control software and the last part shows the measurements that were made on the evaluation board. At the end, obtained results are summarized.

This thesis is focused on the use of light and LEDs for communication between the light and the user. In the introduction, the principles of VLC, which Li-Fi is part of, are described. The work also contains issues on the topics of Li-Fi, such as methods of modulation of carrier signals for data transmission, comparisons between other wireless communications, individual elements of optical frontends, current versions of Li-Fi and other possible uses of this technology. The work also contains the designing of a system working on the principle of Li-Fi.

The aim of my master’s thesis is the design of the LED lighting system for breeding and growing purposes as replacement for the classical high-pressure sodium lamps and other sources of light used today. The whole system can be controlled locally by buttons or remotely by web server using Ethernet interface. LEDs are powered by five-channel step-down converter with current feedback. Converters are controlled by pulse width modulation generated by microcontroller.