2,822 research outputs found
FDI another day: Russian reliance on European investment. Bruegel Policy Contribution Issue n˚3 | February 2020
Most foreign direct investment into Russia originates in the European Union: European
investors own between 55 percent and 75 percent of Russian FDI stock. This points to a
Russian dependence on European investment, making the EU paramount for Russian
medium-term growth. Even if we consider ‘phantom’ FDI that transits through Europe, the
EU remains the primary investor in Russia. Most phantom FDI into Russia is believed to
originate from Russia itself and thus is by construction not foreign
THE STATE OF CHINA-EUROPEAN UNION ECONOMIC RELATIONS. Bruegel Working Paper Issue 09 20 November 2019
China and the European Union have an extensive and growing economic
relationship. The relationship is problematic because of the distortions
caused by China’s state capitalist system and the diversity of interests within
the EU’s incomplete federation. More can be done to capture the untapped
trade and investment opportunities that exist between the parties. China’s
size and dynamism, and its recent shift from an export-led to a domesticdemand-
led growth model, mean that these opportunities are likely to grow
with time. As the Chinese economy matures, provided appropriate policy
steps are taken, it is likely to become a less disruptive force in world markets
than during its extraordinary breakout period
Deep Neural Networks for the Recognition and Classification of Heart Murmurs Using Neuromorphic Auditory Sensors
Auscultation is one of the most used techniques for
detecting cardiovascular diseases, which is one of the main causes
of death in the world. Heart murmurs are the most common abnormal
finding when a patient visits the physician for auscultation.
These heart sounds can either be innocent, which are harmless, or
abnormal, which may be a sign of a more serious heart condition.
However, the accuracy rate of primary care physicians and expert
cardiologists when auscultating is not good enough to avoid most
of both type-I (healthy patients are sent for echocardiogram) and
type-II (pathological patients are sent home without medication or
treatment) errors made. In this paper, the authors present a novel
convolutional neural network based tool for classifying between
healthy people and pathological patients using a neuromorphic
auditory sensor for FPGA that is able to decompose the audio into
frequency bands in real time. For this purpose, different networks
have been trained with the heart murmur information contained in
heart sound recordings obtained from nine different heart sound
databases sourced from multiple research groups. These samples
are segmented and preprocessed using the neuromorphic auditory
sensor to decompose their audio information into frequency
bands and, after that, sonogram images with the same size are
generated. These images have been used to train and test different
convolutional neural network architectures. The best results
have been obtained with a modified version of the AlexNet model,
achieving 97% accuracy (specificity: 95.12%, sensitivity: 93.20%,
PhysioNet/CinC Challenge 2016 score: 0.9416). This tool could aid
cardiologists and primary care physicians in the auscultation process,
improving the decision making task and reducing type-I and
type-II errors.Ministerio de Economía y Competitividad TEC2016-77785-
NAVIS: Neuromorphic Auditory VISualizer Tool
This software presents diverse utilities to perform the first post-processing layer taking the neuromorphic auditory sensors (NAS) information. The used NAS implements in FPGA a cascade filters architecture, imitating the behavior of the basilar membrane and inner hair cells and working with the sound information decomposed into its frequency components as spike streams. The well-known neuromorphic hardware interface Address-Event-Representation (AER) is used to propagate auditory information out of the NAS, emulating the auditory vestibular nerve. Using the information packetized into aedat files, which are generated through the jAER software plus an AER to USB computer interface, NAVIS implements a set of graphs that allows to represent the auditory information as cochleograms, histograms, sonograms, etc. It can also split the auditory information into different sets depending on the activity level of the spike streams. The main contribution of this software tool is that it allows complex audio post-processing treatments and representations, which is a novelty for spike-based systems in the neuromorphic community and it will help neuromorphic engineers to build sets for training spiking neural networks (SNN).Ministerio de Economía y Competitividad TEC2012-37868-C04-0
Stereo Matching in Address-Event-Representation (AER) Bio-Inspired Binocular Systems in a Field-Programmable Gate Array (FPGA)
In stereo-vision processing, the image-matching step is essential for results, although it
involves a very high computational cost. Moreover, the more information is processed, the more time
is spent by the matching algorithm, and the more ine cient it is. Spike-based processing is a relatively
new approach that implements processing methods by manipulating spikes one by one at the time
they are transmitted, like a human brain. The mammal nervous system can solve much more complex
problems, such as visual recognition by manipulating neuron spikes. The spike-based philosophy
for visual information processing based on the neuro-inspired address-event-representation (AER)
is currently achieving very high performance. The aim of this work was to study the viability of a
matching mechanism in stereo-vision systems, using AER codification and its implementation in
a field-programmable gate array (FPGA). Some studies have been done before in an AER system
with monitored data using a computer; however, this kind of mechanism has not been implemented
directly on hardware. To this end, an epipolar geometry basis applied to AER systems was studied
and implemented, with other restrictions, in order to achieve good results in a real-time scenario.
The results and conclusions are shown, and the viability of its implementation is proven.Ministerio de Economía y Competitividad TEC2016-77785-
From climate change to cyber-attacks: incipient financial-stability risks for the euro area. Bruegel Policy Contribution Issue n˚2 | February 2020
The European Central Bank’s November 2019 Financial Stability Review highlighted the
risks to growth in an environment of global uncertainty. It also discusses sovereign-debt
concerns in case interest rates increase, and risks arising from household and corporate
debt. It assesses the risks from a possible overvaluation of asset prices, and evaluates
risks within the banking and non-banking system, and climate risks. On the whole, the
ECB report is comprehensive and covers the main risks to euro-area financial stability.
However, some issues deserve more attention.
• First, the assessment of risks in the housing market should be more nuanced. Current
housing markets relative to those pre-crisis seem to be far less driven by mortgage credit,
and the size of the construction sector has not increased. This is possibly good news for
financial stability because a house price correction would transmit less into mortgage
defaults and corrections to economic activity.
• Second, there should be greater emphasis on changes in market expectations of interest
rates, which can have substantial effects on asset prices. This could be particularly relevant
if interest rate changes are not driven by real-economy developments.
• Third, the financial system relies on a safe asset as a reference. We show that the supply
of safe sovereign assets in the euro area has fallen dramatically, driven by deteriorating
sovereign credit ratings and reduced supplies of bonds from the safest countries. More
safe assets would support financial stability.
• Fourth, though climate risks to financial stability must be taken seriously, risk weights on
green assets should not be reduced since they still contain normal financial stability risks.
Instead, risk weights for brown assets should be increased.
• Fifth, the ECB does not consider cybersecurity and hybrid threats in its assessment. These
threats are significant risks for financial institutions and at the more systemic level.
• Policies to address financial-stability concerns include macroprudential measures. In this
respect, we discover discrepancies between EU countries: countries with the same levels
of house-price overvaluation have adopted very different macroprudential measures.
Some countries might thus have done too much, while others have done too little.
• When it comes to preventing the next recession or reducing its impact, we argue that EU
policymakers need to be better prepared to use discretionary fiscal policy earlier and
more forcefully, in particular because the ability of monetary authorities to react to the
next cyclical downturn is very limited
Cultura y televisión, una relación necesaria
La relación entre cultura y televisión suele presentarse como conflictiva e incluso imposible. En este artículo se hace un repaso histórico a la presencia de contenidos culturales en la televisión pública española, TVE, tanto a nivel nacional como regional, para defender la necesidad de la presencia de espacios culturales en televisión
Los animales extraños
Los animales extraños reflexiona acerca de los límites entre realidad y ficción mediante el relato visual de carácter fantástico.
En nuestras experiencias se mezclan habitualmente la vida ordinaria con las imágenes que nos proporcionan el mundo de la cultura y con la recreación de nuestra imaginación. Este proyecto pone en valor la fantasía como vehículo de escape del mundo real, cuya saturación de catastróficas noticias provocan el anhelo y la búsqueda de alternativas liberadas de la presión de los medios. El propósito de Los animales extraños es reflexionar en torno a la continua mutación de la apariencia del exterior a través de escenas detenidas en el tiempo y de la búsqueda de un espacio de meditación, de un tiempo muerto.Universidad de Sevilla. Grado en Bellas Arte
Multilayer Spiking Neural Network for Audio Samples Classification Using SpiNNaker
Audio classification has always been an interesting subject of research
inside the neuromorphic engineering field. Tools like Nengo or Brian, and hardware
platforms like the SpiNNaker board are rapidly increasing in popularity in
the neuromorphic community due to the ease of modelling spiking neural
networks with them. In this manuscript a multilayer spiking neural network for
audio samples classification using SpiNNaker is presented. The network consists
of different leaky integrate-and-fire neuron layers. The connections between them
are trained using novel firing rate based algorithms and tested using sets of pure
tones with frequencies that range from 130.813 to 1396.91 Hz. The hit rate
percentage values are obtained after adding a random noise signal to the original
pure tone signal. The results show very good classification results (above 85 %
hit rate) for each class when the Signal-to-noise ratio is above 3 decibels, validating
the robustness of the network configuration and the training step.Ministerio de Economía y Competitividad TEC2012-37868-C04-02Junta de Andalucía P12-TIC-130
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