Flash Talks

Experimental set-up regarding complex optoelectronic properties thin film solar cells

Jacob Antonio Andrade Arvizu

Graded bandgap concepts have been shown to be a disruptive issue in order to achieve high efficiency devices in thin film chalcogenide photovoltaics. In the case of kesterite (Cu2ZnSn(SxSe(1-x))4) based solar cells, two main strategies are being explored in order to achieve bandgap grading: cationic substitution (Cu by Ag, Zn by Cd, Sn by Ge and Si) and anionic (S-Se) …

Feminisms by hashtags: reflections on the controversies aroused by the recent Brazilian cyberfeminist practices

Josemira Reis

In 2015 several feminist claims came up in the Brazilian digital spaces of sociability, when millions of hashtags drew attention to issues such as feminicide, sexual harassment, abortion criminalization, among others social dilemmas that affect women in the country. According to Google Trends, campaigns such as #primeiroassedio, #meumigosecreto and #mulherescontracunha computed over eleven million seeks. And terms such as “feminism” …

Adding expressive capabilities to speech synthesis

Marc Freixes

With the spread of smart devices and personal assistants synthetic voices are increasingly present in our lives. They are very intelligible and their naturalness has improved dramatically in the last few years. However, their expressiveness is in some cases limited. The main focus of my thesis is to explore ways to add new expressive capabilities to synthetic voices. Currently, the …

The effects of early musical training in 5-years-old children on the expression of overt but not latent absolute pitch.

Magdalena Flexas Morey

Theories of absolute pitch development suggest that training onset during a sensitive period before the age of 7 years plays a critical role for the expression of overt absolute pitch (OAP), a rare ability to identify the pitch height of a musical tone without external reference. Latent absolute pitch (LAP), on the other hand, is widely distributed across the general …

Adding expressive capabilities to speech synthesis.

Marc Freixes

With the spread of smart devices and personal assistants synthetic voices are increasingly present in our lives. They are very intelligible and their naturalness has incredibly increased in the last few years, however their expressiveness is in some cases limited. The main focus of my thesis is to explore ways to add new expressive capabilities to synthetic voices. Currently, the …

Synthetic natural gas production through CO2 methanation process

Andreina Alexandra Alarcón Avellán

The chemical energy storage as the power-to-gas (PtG) technology is called to play an important role in the future energy system, especially in countries where there is already a significant investment in renewable energy. This technology proves to be efficient because besides taking advantage of electricity excess, it also incorporates CO2 as a source of carbon for the production of …

Do short-term rental platforms affect housing markets? Evidence from Airbnb in Barcelona

Rodrigo Martinez

Peer-to-peer platforms such as Airbnb have recently entered the market thanks to the development of new technologies. Their influence on traditional housing markets remains understudied. At the same time, the multiplicity of local regulations adopted by big touristic cities in developed countries shows a lack of  consensus both on the consequences and on the role of regulation. However, the evidence …

Information transmission in a neuronal network

Maria Masoliver Vila

Despite intensive research, the mechanisms by which neurons encode information in spike trains remain poorly understood. Recent work has focused on how a single neuron (modeled using the FitzHugh-Nagumo model) encodes a weak (subthreshold) sinusoidal signal, in a noisy environment [1], and on the impact of a second neuron, which does not perceive the signal [2]. By applying a symbolic …

Mapping infraslow cortical brain activity with graphene transistor arrays

Eduard Masvidal Codina

Recording infraslow brain signals (<0.1 Hz) with microelectrodes is severely hampered by current microelectrode materials, primarily due to limitations resulting from voltage drift and high electrode impedance. Hence, most recording systems include high-pass filters that solve saturation issues but come hand in hand with loss of physiological and pathological information. Flexible epicortical and intracortical arrays of graphene solution-gated field-effect transistors (gSGFETs) …

A machine learning approach to develop building energy retrofit strategies

Benedetto Grillone

It is estimated that about 40 % of worldwide energy use occurs in buildings. Increasing energy efficiency in the building sector has become a priority worldwide and especially in the European Union, although it is clear that energy efficiency potential that lies in buildings is not being properly harnessed. Given the relatively low turn-over rate of the building stock, energy …