Different module placements in a modular façade system for natural ventilation

Nowadays natural ventilation has gained prominence because its correct use can reduce energy consumption for cooling systems and improve thermal comfort among users. In this paper, we report on the modelling initiative, based on the wind tunnel tests that were carried out for the determination of the influence of natural ventilation in buildings. Indeed, the renewal of air in a closed environment without using an air conditioning system with mechanical elements can lead to energy savings and, in addition, provide air quality.The wind tunnel tests were carried out by varying the positioning of six ventilation modules in the façade system configuration. The modules were positioned below the window-sill (ventilated window-sill) as well as separately above and below the façade. The wind speed measurements were taken inside and outside the model for the different façades configurations to evaluate the best performance in relation to natural ventilation. The results supported the positioning of the six ventilation modules below the window-sill, forming a â ventilated window-sillâ as the most effective natural ventilation solution.

O processo de legitimação e a gestão de impressões na comunicação organizacional: O caso da EDP – Energias de Portugal, S.A.

Tese de Doutoramento Ciências Empresariais

How does banking industry influence economic growth in Latin American countries?

Mestrado em Finanças

Molt cycle of the natural population of Palaemonetes argentinus (Crustacea, Palaemonidae) from Los Padres Lagoon (Buenos Aires, Argentina)

The molt cycle of the natural population of Palaemonetes argentinus Nobili, 1901 from Los Padres Lagoon, Buenos Aires, Argentina, was studied in relation to age, sex, and environmental factors. A total of 1645 individuals (740 females, 539 males, and 366 juveniles) were collected and analyzed between December 1995 and December 1996. The results indicate that the sex ratio (males:females) remains around 1:1.4 throughout most of the year. The reproductive period extends from September until February (spring and summer), with maximum sexual activity in October and November. Two cohorts originated in the spring and in the summer were differentiated. Ovigerous females arrest their molt cycle during the intermolt period to restart it after oviposition. The duration of the intermolt period does not differ between adults and juveniles. Since the percentage of premolt individuals represents 60% of the total cycle, it was classified as a diecdysic cycle. Within the studied range of water temperatures, the observed variations in the span of the different stages, indicate that this factor does not alter the molt frequency. Like in the rest of decapods, the intermolt duration of P. argentinus is modified by ovarian maturation.

Rosca participation in Benin: a commitment issue

In the light of first-hand data from a Beninese urban household survey in Cotonou, we investigate several motives aiming to explain participation in Rotating Savings and Credit Associations. We provide anecdotal pieces of evidence, descriptive statistics, FIML regressions and matching estimates which tend to indicate that most individuals use their participation in a rosca as a device to commit themselves to save money and to deal with self-control problems.

Optimal feedback control rules sensitive to controlled endogenous risk-aversion

The objective of this paper is to correct and improve the results obtained by Van der Ploeg (1984a, 1984b) and utilized in the theoretical literature related to feedback stochastic optimal control sensitive to constant exogenous risk-aversion (see, Jacobson, 1973, Karp, 1987 and Whittle, 1981, 1989, 1990, among others) or to the classic context of risk-neutral decision-makers (see, Chow, 1973, 1976a, 1976b, 1977, 1978, 1981, 1993). More realistic and attractive, this new approach is placed in the context of a time-varying endogenous risk-aversion which is under the control of the decision-maker. It has strong qualitative implications on the agent's optimal policy during the entire planning horizon.

A balance of questions: what can we ask of climate change economics?

The standard approach to the economics of climate change, which has its best known implementation in Nordhaus's DICE and RICE models (well described in Nordhaus's 2008 book, A Question of Balance) is not well equipped to deal with the possibility of catastrophe, since we are unable to evaluate a risk averse representative agent's expected utility when there is any signi cant probability of zero consumption. Whilst other authors attempt to develop new tools with which to address these problems, the simple solution proposed in this paper is to ask a question that the currently available tools of climate change economics are capable of answering. Rather than having agents optimally choosing a path (that differs from the recommendations of climate scientists) within models which cannot capture the essential features of the problem, I argue that economic models should be used to determine the savings and investment paths which implement climate targets that have been suggested in the physical science literature.

Prediction of the economic cost of individual long-term care in the Spanish population

Pensions together with savings and investments during active life are key elements of retirement planning. Motivation for personal choices about the standard of living, bequest and the replacement ratio of pension with respect to last salary income must be considered. This research contributes to the financial planning by helping to quantify long-term care economic needs. We estimate life expectancy from retirement age onwards. The economic cost of care per unit of service is linked to the expected time of needed care and the intensity of required services. The expected individual cost of long-term care from an onset of dependence is estimated separately for men and women. Assumptions on the mortality of the dependent people compared to the general population are introduced. Parameters defining eligibility for various forms of coverage by the universal public social care of the welfare system are addressed. The impact of the intensity of social services on individual predictions is assessed, and a partial coverage by standard private insurance products is also explored. Data were collected by the Spanish Institute of Statistics in two surveys conducted on the general Spanish population in 1999 and in 2008. Official mortality records and life table trends were used to create realistic scenarios for longevity. We find empirical evidence that the public long-term care system in Spain effectively mitigates the risk of incurring huge lifetime costs. We also find that the most vulnerable categories are citizens with moderate disabilities that do not qualify to obtain public social care support. In the Spanish case, the trends between 1999 and 2008 need to be further explored.

Pla d'acció d'energia sostenible al monestir tibetà Sakya Tashi Ling

El Monestir Budista del Garraf presenta un Pla Executiu per a l’ampliació del monestir. Amb la finalitat de millorar l’eficiència energètica en el futur monestir, s’estima el consum en compliment amb alguns criteris del Decret d’Ecoeficiència. Posteriorment, es realitza una comparació del consum actual del sistema amb l’estimat, analitzant les dades de manera global i per subsistemes. Mitjançant la realització d’un inventari del consum actual, l’estimació del consum futur, l’eficiència energètica i els potencials de captació d’energies renovables, es realitza un estudi per la implantació d’energies renovables al monestir. Es realitzen i s’avaluen les propostes per tal d’augmentar l’estalvi energètic del monestir i disminuir l’impacte ambiental. Es realitza l’estudi de dos escenaris energètics: el cobriment del 20% de la demanda energètica amb energies renovables (Pacte d’Alcaldes) i l’abastiment complet del consum amb energies renovables. Valorant diferents criteris ambientals, socials i econòmics es recomanen propostes per la seva aplicació.

El desplegament d'un servei de préstec i consulta de llibres electrònics: l'experiència de la Biblioteca Virtual de la Universitat Oberta de Catalunya (BUOC)

La Biblioteca de la UOC (BUOC) ha ofert durant tres mesos (octubre-desembre 09), en fase de prova pilot, un servei de consulta i préstec de lectors de llibres electrònics (e-readers). Aquest nou desplegament s'ha desenvolupat en consonància amb l'aposta general de la Universitat en innovació en tecnologies aplicades a l'educació, i la voluntat de potenciar les col·leccions de llibres electrònics i l'ús dels dispositius de lectura de llibres electrònics com una extensió més de la tecnologia del Campus 5.0, en el suport a l'aprenentatge dels seus estudiants durant la seva formació a la Universitat. Aquest treball presenta en detall les especificacions de la prova pilot a més de contenir un anàlisi i avaluació dels resultats obtinguts: punts forts i punts febles, relació dels aspectes a millorar i modificar, de cara a la consolidació final del servei.

El despliegue de un servicio de préstamo y consulta de libros electrónicos : la experiencia de la Biblioteca Virtual de la Universitat Oberta de Catalunya (BUOC)

La Biblioteca de la UOC (BUOC) ha ofert durant tres mesos (octubre-desembre09), en fase de prova pilot, un servei de consulta i préstec de lectors dellibres electrònics (e-readers). Aquest nou desplegament s'ha desenvolupat d'acordamb l'aposta general de la Universitat per la innovació en tecnologies aplicades al'ensenyament, i la voluntat de potenciar les col·leccions de llibres electrònics i l'úsdels dispositius de lectura de llibres electrònics com una extensió més de latecnologia del Campus 5.0, en el suport a l'aprenentatge dels estudiants durant laseva formació a la Universitat. Aquest treball presenta en detall les especificacionsde la prova pilot, a més de contenir una anàlisi i una avaluació dels resultatsobtinguts: punts forts i punts febles, i relació dels aspectes que cal millorar i modificaramb vista a la consolidació final del servei.

About IPERS, July 2008

It’s never too early to start thinking about retirement. Regardless of your retirement plans or anticipated retirement age, you want a financially secure retirement. IPERS provides the security you need through guaranteed benefits. With IPERS, unlike other retirement plans, benefits aren’t tied to the performance of the stock market and you don’t need to be an experienced investor to make your retirement dreams a reality. Remember, your IPERS benefits are only one part of your overall retirement savings. Your total retirement income will come from a combination of your IPERS benefits, social security, personal savings, and any other retirement plan benefits.

For Vested Members, July 2008

IPERS provides the security you need through guaranteed benefits. With IPERS, unlike other retirement plans, benefits aren’t tied to the performance of the stock market and you don’t need to be an experienced investor to make your retirement dreams a reality. Your IPERS benefits are only one part of your overall retirement savings. Your total retirement income will come from a combination of your IPERS benefits, social security, personal savings, and any other retirement plan benefits.

Nearing Retirement, July 2008

IPERS provides the security you need through guaranteed benefits. With IPERS, unlike other retirement plans, benefits aren’t tied to the performance of the stock market and you don’t need to be an experienced investor to make your retirement dreams a reality. Your IPERS benefits are only one part of your overall retirement savings. Your total retirement income will come from a combination of your IPERS benefits, social security, personal savings, and any other retirement plan benefits.