Numerical modelling of compound channel flow

Fundação para a Ciência e a Tecnologia (FCT) - SFRH/BD/64337/2009 ; projects PTDC/ECM/70652/2006, PTDC/ECM/117660/2010 and RECI/ECM-HID/0371/2012

A method to correct the flow distortion of offshore wind data using CFD simulation and experimental wind tunnel tests

The assessment of wind energy resource for the development of deep offshore wind plants requires the use of every possible source of data and, in many cases, includes data gathered at meteorological stations installed at islands, islets or even oil platforms—all structures that interfere with, and change, the flow characteristics. This work aims to contribute to the evaluation of such changes in the flow by developing a correction methodology and applying it to the case of Berlenga island, Portugal. The study is performed using computational fluid dynamic simulations (CFD) validated by wind tunnel tests. In order to simulate the incoming offshore flow with CFD models a wind profile, unknown a priori, was established using observations from two coastal wind stations and a power law wind profile was fitted to the existing data (a=0.165). The results show that the resulting horizontal wind speed at 80 m above sea level is 16% lower than the wind speed at 80 m above the island for the dominant wind direction sector.

Severity of atopic dermatitis and Ascaris lumbricoides infection: an evaluation of CCR4+ and CXCR3+ helper T cell frequency

INTRODUCTION: Ascaris lumbricoides-infected patients present lower prevalence of severe atopic dermatitis. METHODS: Peripheral blood of infected children with atopic dermatitis was assessed by flow cytometry of the frequency of Th1 and Th2 cells through the expression of CXCR3 and CCR4 chemokine receptors, respectively. RESULTS: Helminth-free patients with atopic dermatitis presented a high frequency of CCR4+Th2 cells. Parasitized patients with atopic dermatitis showed a lower frequency of CXCR3+Th1 cells compared to infected individuals only. CONCLUSIONS: Ascariasis modifies the blood traffic of Th2 cells in atopic dermatitis patients, while the allergic disease down-regulates the traffic of Th1 cells in parasitized patients.

Almirante: Evaluating the board game: Board game, startup, discounted cash flow, venture capital method, real options

This thesis evaluates a start-up company (Jogos Almirante Lda) whose single asset is a board game named Almirante. It aims to conclude whether it makes sense to create a company or just earn copyrights. The thesis analyzes the board game’s market, as part of the general toy’s market, from which some data exists: European countries as well as the USA. In this work it is analyzed the several ways to finance a start-up company and then present an overview of the valuation of the Jogos Almirante based on three different methods: Discounted Cash Flow, Venture Capital Method and Real Options.

How can Impresa increase the traffic of expresso website?

This report aims at describing the project developed in the Customer Relationship Management Field Lab, under a partnership established between Nova SBE and the group IMPRESA. The major goal was to elaborate on possible initiatives to increase the traffic on the website of Expresso, which were supported by evidences found through structured interviews and the company’s internal data. As the main findings are the increasing role of mobile devices and social media on the news’ consumption habits. These encourage an integrated improvement of the overall digital offer of Expresso, in a perspective of brand and audience development that should be a goal for the whole company.

Does direct cash flow presentation help in predicting future operating cash flow?

Research literature and regulators are unconditional in pointing the disclosure of operating cash flow through direct method a section of unique information. Besides the intuitive facet, it is also consistent in forecasting future operating cash flows and a cohesive piece to financial statement puzzle. Bearing this in mind, I produce an analysis on the usefulness and predictive ability on the disclosure of gross cash receipts and payments over the disclosure of reconciliation between net income and accruals for two markets with special features, Portugal and Spain. Results validate the usefulness of direct method format in predicting future operating cash flow. Key

The flow-performance relationship around the world

We use a new dataset to study how mutual fund flows depend on past performance across 28 countries. We show that there are marked differences in the flow-performance relationship across countries, suggesting that US findings concerning its shape do not apply universally. We find that mutual fund investors sell losers more and buy winners less in more developed countries. This is because investors in more developed countries are more sophisticated and face lower costs of participating in the mutual fund industry. Higher country-level convexity is positively associated with higher levels of risk taking by fund managers.

The effect of energy and traffic light labeling on parents purchasing decisions of cereals for their children

Objective: Nutritional labeling systems are considered a tool to fight obesity since they aim to contribute for more informed food choices as well as assist consumers to make healthier nutrition options and in this manner, contribute to a decrease in the obesity rate. This study intends to analyze the effect of different types of labeling systems on parents’ purchasing decisions for their children on a specific product: breakfast cereals. More precisely, how labels affect parents’ perception of healthiness regarding cereals and if the nutritional information has an effect on intended purchases for their children. Participants and methods: We conducted a study with 135 Portuguese parents of children aged 4 to12 years. Parents answered a questionnaire with one of three hypothetical cereals menus. Menus only differed in their nutritional labeling technique: no labels (control group), reference intake labels or traffic light labels. In addition, we conducted 20 face-to-face interviews to a different group of parents in order to perform a recall task. Findings: This paper provides no evidence to suggest that energy labeling or traffic light labeling systems alone were successful in helping parents making healthy purchases of cereals for their children. Therefore, there is the need to promote supplementary policies to encourage the consumption of healthier food and help fight obesity.

Work ethic and the legacies of political regimes

This article studies the cross-country differences in work ethic and claims that different political regimes transmitted different work ethics that still persist today. Using the World Values Survey and starting our political regime analysis in 1900, we find that Democratic regimes promote more effectively work relevance and competitiveness than Autocratic and Anocratic regimes, and that the political regime history of the country is more important than the present level of democracy. Moreover, we prove that this differences were transmitted through generations by parents, who optimally choose what work ethic to transmit taking into account their own values.

Desenvolvimento morfológico de folhas de Hevea brasiliensis Muell. Arg. e H. pauciflora Muell. Arg. submetidas a dois regimes hídricos

As características morfológicas relacionadas com a ontogenia foliar das espécies de seringueira foram influenciadas pela deficiência hídrica. O déficit hídrico provocou redução significativa no número de folhas, no comprimento do folíolo central, na matéria seca foliar, na matéria fresca foliar, na classe do ângulo folíolo-pecíolo e no tamanho da brotação em H. brasiliensis e H. pauciflora. A espessura dos tecidos anatômicos das folhas foi pouco modificada cm ambos os tratamentos, provavelmente devido ao pequeno efeito do curto período de aplicação do estresse hídrico e das condições do ambiente sobre a formação desses tecidos. No entanto, H. pauciflora tende a apresentor maior resistência à perda de água, quando comparada com H. brasiliensis (IAN 873), visto apresentar folhas com características mais xeromórficas. A classe do ângulo folíolo-pecíolo e o índice plastocrono não foram adequados para representar a idade fisiológica das folhas da seringueira. No entanto, foi possível determinar o valor de referência (R = 50,0 mm) para a seringueira. Verificou-se que as plantas com déficit hídrico apresentaram menor taxa de emergência de folhas durante o desenvolvimento do lançamento. A classe do ângulo folíolo-pecíolo foi significativamente influenciada pelas condições do ambiente.

Identificação e concentração das antocianinas durante a ontogenia foliar de Hevea brasiliensis Muell. Arg. (IAN 873) e H. pauciflora Muell. Arg. submetidas a dois regimes hídricos .

Através de cromatografia descendente em papel, com a utilização de três sistemas de solventes, indentificaram-se os pigmentos presentes nas folhas de seringueira. Por meio das análises dos cromatogramas e dos RF encontrados, verificou-se a presença de duas antocianinas, a pelargonidina e a cianidina. Foi observada a presença de uma mancha amarela, com RF acima de 0,90, provavelmente o quempferol. O teor de antocianina foi influenciado pelo déficit hídrico em plântulas de serigueira, com drástica redução nos primeiros dez dias de antogenia foliar. Após o vigésimo dia de idade, não houve diferença significativa entre os tratamentos. A progênie do clone IAN 873 de Hevea brasiliensis foi mais influenciada pela deficiência hídrica que a de H. pauciflora.

A type system for value-dependent information flow analysis

Information systems are widespread and used by anyone with computing devices as well as corporations and governments. It is often the case that security leaks are introduced during the development of an application. Reasons for these security bugs are multiple but among them one can easily identify that it is very hard to define and enforce relevant security policies in modern software. This is because modern applications often rely on container sharing and multi-tenancy where, for instance, data can be stored in the same physical space but is logically mapped into different security compartments or data structures. In turn, these security compartments, to which data is classified into in security policies, can also be dynamic and depend on runtime data. In this thesis we introduce and develop the novel notion of dependent information flow types, and focus on the problem of ensuring data confidentiality in data-centric software. Dependent information flow types fit within the standard framework of dependent type theory, but, unlike usual dependent types, crucially allow the security level of a type, rather than just the structural data type itself, to depend on runtime values. Our dependent function and dependent sum information flow types provide a direct, natural and elegant way to express and enforce fine grained security policies on programs. Namely programs that manipulate structured data types in which the security level of a structure field may depend on values dynamically stored in other fields The main contribution of this work is an efficient analysis that allows programmers to verify, during the development phase, whether programs have information leaks, that is, it verifies whether programs protect the confidentiality of the information they manipulate. As such, we also implemented a prototype typechecker that can be found at http://ctp.di.fct.unl.pt/DIFTprototype/.

Reporting cash flow evidence from campanies listed in the Euronext Lisbon

Based on the 2013 and 2014 consolidated statements of cash flows of companies listed in Euronext Lisbon, this Work Project analyses the cash flow disclosures, namely if they are in accordance with International Accounting Standards 7, specifically the format, the choice of classification interests, dividends paid and received and the composition of cash and cash equivalents. Additionally, quality of income ratio is analyzed due to its importance for users of financial statements. The results show evidence of uniformity and consistency in the use of the direct method for reporting operational activities in both years, but there are some differences regarding the disclosure of interests and dividends, paid and received, respectively.

Avaliação do desempenho de fundos de investimento de ouro nos EUA: influência dos diferentes regimes de mercado na seletividade e market-timing

Dissertação de mestrado em Finanças