40 resultados para Point of no return
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A Work Project, presented as part of the requirements for the Award of a Masters Degree in Management from the NOVA – School of Business and Economics
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RESUMO: Nos últimos anos assistiu-se a um reposicionamento das pessoas portadoras de doença mental na sociedade, no sentido de viverem em pleno os seus direitos, sem restrições. Esta tendência acompanhou as transformações que se têm vivido na forma como os utentes dos serviços de saúde interagem com os mesmos e com os profissionais de saúde, de forma a permitir uma maior autonomização e responsabilização no que concerne ao tratamento da sua doença, a relação que estabelecem com o seu médico, e a participação na avaliação e monitorização da qualidade dos serviços. Mais recentemente, também no mundo científico, esta afirmação se fez sentir, com o surgimento de investigação liderada por utentes, no sentido de estudar de forma adequada questões que partem do seu ponto de vista, e que possibilitem a produção de conhecimento significativa no contexto das suas experiências. Com o presente trabalho pretende-se contribuir para a validação da versão portuguesa do VOICE (Service Users’ Perceptions of Inpatient Care, Views on Inpatient Care) (Evans et al., 2012), instrumento para a avaliação dos serviços de internamento de agudos em psiquiatria, construído a partir de um investigação liderado por utentes e partindo das suas perspectiva. O VOICE é constituído por 19 questões, agrupadas em sete domínios: admissão; cuidados e tratamento; medicação; equipa de técnicos do internamento; terapia e atividades; ambiente e diferenças. O presente estudo envolveu uma amostra de 85 utentes de um serviço de internamento de agudos de uma instituição psiquiátrica do Norte de Portugal. A versão portuguesa do VOICE apresentou boa aceitação por parte dos utentes e boas características psicométricas - a consistência interna foi alta (α = 0,87) e todos, exceto um item (item 6), apresentam elevadas correlações item-total (variando de 0,18 - item 6 a 0,71 - item 11; M = 0,54, DP = 0,15), sugerindo ser um instrumento útil na avaliação dos serviços de internamento de agudos. No futuro torna-se necessário alargar o estudo a outros contextos de internamento e envolvendo amostras mais alargadas.-------------- ABSTRACT: In recent years there has been a gradual process to help people with the experience of mental illness regaining their full rights. Following the advances in the understanding of mental health problems, and the use of medication to help patients overcome symptoms, service-users have become more autonomous and responsible in the way they deal with health professionals, and are now called to participate in assessing and monitoring mental health services and policies. In the context of these transformations we have assisted to the emergence of research led by service-users (in this case of psychiatric and mental health services) in order to emphasize their point of view, and to enable the production of significant knowledge resulting from their experiences, and perceptions. The present study aims to contribute to the dissemination of service-user led research, based on the adaptation and validation of the Portuguese version of the VOICE - Service Users' Perceptions Questionnaire, Views on Inpatient Care. (Evans et al., 2012). The VOICE is composed of 19 questions, grouped in seven domains: admissions, care and treatment, medication, team of technicians during hospitalization, therapy and activities, environment and diversity. The present study involved a sample of 85 inpatient of a psychiatric institution in Northern Portugal. The Portuguese version of the VOICE showed good psychometric properties and was well accepted by patients [high internal consistency (α = 0,87); and high correlation of each item, except item 6, with the total score (ranging from 0.18 on item 6 to 0.71 on item 11; average=0,54; SD=0,15), suggesting it to be a useful tool for assessing inpatient services. In the future there is a need to extend the study to other contexts and include larger samples.
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Mesoamerican cultures had a strong tradition of written and pictorial manuscripts, called the codices. In studies already performed it was found the use of Maya Blue, made from a mixture of indigo and a clay called palygorskite, forming an incredibly stable material where the dye is trapped inside the nanotubes of the clay, after heating. However, a bigger challenge lies in the study of the yellows used, for these civilizations might have used this clay-dye mixture to produce their yellow colorants. As a first step, it was possible to provide identification, by non-invasive methods, of two colorants (a flavonoid and a carotenoid). While the flavonoid absorbed between 368-379 nm, the carotenoid would absorb around 455 nm. A temperature study also conducted allowed to set 140ºC as the desirable temperature to heat the samples without degrading them. FT-IR, conventional Raman and SERS allowed us to understand the existence of a reaction between the dyes and the clays (palygorskite and kaolinite), however it is difficult to understand it in a molecular point of view. As a second step, five species of Mexican dyes were selected on the basis of historical sources. The Maya yellow samples were produced adapting the recipe proposed by Reyes-Valerio, supporting the yellow dyes extracted from the dried plants on the clays, with addition of water, and then heated at 140ºC. It was found that the addition of water in palygorskite would increase the pH, hence deprotonating the molecules having a clear negative effect in the color. A second recipe was developed, without the addition of water; however, it was found that the use of water based binders would still alter the color of the samples with palygorskite. In this case, kaolinite without heating yield better results as a Maya yellow hybrid. It was found that the Maya chemistry might not have been the same for all the colors. The Mesoamericans might have found that different dyes could work better to their desires if matched with different clays. It was noticeable that for a clear distinction between flavonoids and carotenoids the reflectance and emission studies suffice, but when clay is added, Raman techniques will perform better. For this reason, conventional Raman and SERS were employed in order to create a database for the Mesoamerican dyestuffs for a future identification.
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Due to the importance and wide applications of the DNA analysis, there is a need to make genetic analysis more available and more affordable. As such, the aim of this PhD thesis is to optimize a colorimetric DNA biosensor based on gold nanoprobes developed in CEMOP by reducing its price and the needed volume of solution without compromising the device sensitivity and reliability, towards the point of care use. Firstly, the price of the biosensor was decreased by replacing the silicon photodetector by a low cost, solution processed TiO2 photodetector. To further reduce the photodetector price, a novel fabrication method was developed: a cost-effective inkjet printing technology that enabled to increase TiO2 surface area. Secondly, the DNA biosensor was optimized by means of microfluidics that offer advantages of miniaturization, much lower sample/reagents consumption, enhanced system performance and functionality by integrating different components. In the developed microfluidic platform, the optical path length was extended by detecting along the channel and the light was transmitted by optical fibres enabling to guide the light very close to the analysed solution. Microfluidic chip of high aspect ratio (~13), smooth and nearly vertical sidewalls was fabricated in PDMS using a SU-8 mould for patterning. The platform coupled to the gold nanoprobe assay enabled detection of Mycobacterium tuberculosis using 3 8l on DNA solution, i.e. 20 times less than in the previous state-of-the-art. Subsequently, the bio-microfluidic platform was optimized in terms of cost, electrical signal processing and sensitivity to colour variation, yielding 160% improvement of colorimetric AuNPs analysis. Planar microlenses were incorporated to converge light into the sample and then to the output fibre core increasing 6 times the signal-to-losses ratio. The optimized platform enabled detection of single nucleotide polymorphism related with obesity risk (FTO) using target DNA concentration below the limit of detection of the conventionally used microplate reader (i.e. 15 ng/μl) with 10 times lower solution volume (3 μl). The combination of the unique optical properties of gold nanoprobes with microfluidic platform resulted in sensitive and accurate sensor for single nucleotide polymorphism detection operating using small volumes of solutions and without the need for substrate functionalization or sophisticated instrumentation. Simultaneously, to enable on chip reagents mixing, a PDMS micromixer was developed and optimized for the highest efficiency, low pressure drop and short mixing length. The optimized device shows 80% of mixing efficiency at Re = 0.1 in 2.5 mm long mixer with the pressure drop of 6 Pa, satisfying requirements for the application in the microfluidic platform for DNA analysis.
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Dissertation to obtain the degree of Master in Chemical and Biochemical Engineering
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Transport is an essential sector in modern societies. It connects economic sectors and industries. Next to its contribution to economic development and social interconnection, it also causes adverse impacts on the environment and results in health hazards. Transport is a major source of ground air pollution, especially in urban areas, and therefore contributing to the health problems, such as cardiovascular and respiratory diseases, cancer, and physical injuries. This thesis presents the results of a health risk assessment that quantifies the mortality and the diseases associated with particulate matter pollution resulting from urban road transport in Hai Phong City, Vietnam. The focus is on the integration of modelling and GIS approaches in the exposure analysis to increase the accuracy of the assessment and to produce timely and consistent assessment results. The modelling was done to estimate traffic conditions and concentrations of particulate matters based on geo-references data. A simplified health risk assessment was also done for Ha Noi based on monitoring data that allows a comparison of the results between the two cases. The results of the case studies show that health risk assessment based on modelling data can provide a much more detail results and allows assessing health impacts of different mobility development options at micro level. The use of modeling and GIS as a common platform for the integration of different assessments (environmental, health, socio-economic, etc.) provides various strengths, especially in capitalising on the available data stored in different units and forms and allows handling large amount of data. The use of models and GIS in a health risk assessment, from a decision making point of view, can reduce the processing/waiting time while providing a view at different scales: from micro scale (sections of a city) to a macro scale. It also helps visualising the links between air quality and health outcomes which is useful discussing different development options. However, a number of improvements can be made to further advance the integration. An improved integration programme of the data will facilitate the application of integrated models in policy-making. Data on mobility survey, environmental monitoring and measuring must be standardised and legalised. Various traffic models, together with emission and dispersion models, should be tested and more attention should be given to their uncertainty and sensitivity
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Land plant evolution required the generation of a new body plan that could resist the harsher and fluctuating environmental conditions found outside of aquatic environments. Unraveling the genetic basis of plant developmental innovations is not only revealing in terms of an evolutionary point of view, but it is also important for understanding the emergence of agronomically important traits. Comparative genetic studies between basal and modern land plants, both at the genome and trancriptome levels, can help in the generation of hypotheses related to the genetic basis of plant evolutionary development.(...)
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This research has as a goal to give an overview of what Project Management is in Portugal. The purpose is not to focus on a small picture, but to understand the broad concept and perception of Project Management in Portugal in two very important sectors: Profit- and Non-Profit Sector. Both Profit- and Non-Profit project managers have been interviewed, giving an insight of how different projects are in both sectors and why. This paper will be especially helpful comparing the Project Management maturity of Portugal to other countries regarding these two different point of views.
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Prostate cancer (PCa) is the most common form of cancer in men, in Europe (World Health Organization data). The most recent statistics, in Portuguese territory, confirm this scenario, which states that about 50% of Portuguese men may suffer from prostate cancer and 15% of these will die from this condition. Its early detection is therefore fundamental. This is currently being done by Prostate Specific Antigen (PSA) screening in urine but false positive and negative results are quite often obtained and many patients are sent to unnecessary biopsy procedures. This early detection protocol may be improved, by the development of point-of-care cancer detection devices, not only to PSA but also to other biomarkers recently identified. Thus, the present work aims to screen several biomarkers in cultured human prostate cell lines, serum and urine samples, developing low cost sensors based on new synthetic biomaterials. Biomarkers considered in this study are the following: prostate specific antigen (PSA), annexin A3 (ANXA3), microseminoprotein-beta (MSMB) and sarcosine (SAR). The biomarker recognition may occurs by means of molecularly imprinted polymers (MIP), which are a kind of plastic antibodies, and enzymatic approaches. The growth of a rigid polymer, chemically stable, using the biomarker as a template allows the synthesis of the plastic antibody. MIPs show high sensitivity/selectivity and present much longer stability and much lower price than natural antibodies. This nanostructured material was prepared on a carbon solid. The interaction between the biomarker and the sensing-material produces electrical signals generating quantitative or semi-quantitative data. These devices allow inexpensive and portable detection in point-of-care testing.
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Consumer behavior: Sport Zone. The analysis of "The impact of in-store activations (communication) in the consumer's emotions" Several studies have been conducted on the consumer behavior. This study aims to analyze and understand which factors are important to consumers’ emotions when the purchase decision occurs, the brand awareness, brand loyalty and the campaigns/activations’ impact in the above factors. Two research surveys were conducted to realize this study, the first online and the other was an interview to the Agency Up Partner who conceived and put into practice this Fitness campaign. First of all, was the consumer’s survey, a survey with 100 answers, to understand which factors are taken into account when a campaign in-store is held, in which the atmosphere is mainly used to arouse consumer’s desire to purchase, and also emotions. Second, the interview with the agency was realized to find out on what they were based on when they delineate it, and if the raise of emotions was taken into account in the origin of it. Concluding, emotions have a significant impact on formation of consumer in-store behavior, satisfaction and loyalty. As we could assay through of how this Fitness campaign was carried out as well as the optimal feedback received by consumers, improved attention over in-store marketing activity strongly influences consumer behavior at the point of purchase. “Sport Zone: A new store concept where the love for sports is combined with functionality”