A deep narrowband survey for planetary nebulae at the outskirts of M33

Context: Planetary nebulae (PNe) are excellent tracers of stellar populations with low surface brightness, and therefore provide a powerful method to detect and explore the rich system of substructures discovered around the main spiral galaxies of the Local Group. Aims: We searched the outskirts of the Local Group spiral galaxy M33 (the Triangulum) for PNe to gain new insights into the extended stellar substructure on the northern side of the disc and to study the existence of a faint classical halo. Methods: The search is based on wide field imaging covering a 4.5 square degree area out to a maximum projected distance of about 40 kpc from the centre of the galaxy. The PN candidates are detected by the combination of images obtained in narrowband filters selecting the [OIII]$\lambda5007\AA$ and H$\alpha$ + [NII] nebular lines and in the continuum g' and r' broadband filters. Results:Inside the bright optical disc of M33, eight new PN candidates were identified, three of which were spectroscopically confirmed. No PN candidates were found outside the limits of the disc. Fourteen additional sources showing [OIII] excess were also discovered. Conclusions:The absence of bright PN candidates in the area outside the galaxy disc covered by this survey sets an upper limit to the luminosity of the underlying population of $\mathrm{\sim1.6\cdot10^{7}L_{\odot}}$, suggesting the lack of a massive classical halo, which is in agreement with the results obtained using the RGB population.Comment: 13 pages, 18 figure

European exchange trading funds trading with locally weighted support vector regression

In this paper, two different Locally Weighted Support Vector Regression (wSVR) algorithms are generated and applied to the task of forecasting and trading five European Exchange Traded Funds. The trading application covers the recent European Monetary Union debt crisis. The performance of the proposed models is benchmarked against traditional Support Vector Regression (SVR) models. The Radial Basis Function, the Wavelet and the Mahalanobis kernel are explored and tested as SVR kernels. Finally, a novel statistical SVR input selection procedure is introduced based on a principal component analysis and the Hansen, Lunde, and Nason (2011) model confidence test. The results demonstrate the superiority of the wSVR models over the traditional SVRs and of the v-SVR over the ε-SVR algorithms. We note that the performance of all models varies and considerably deteriorates in the peak of the debt crisis. In terms of the kernels, our results do not confirm the belief that the Radial Basis Function is the optimum choice for financial series

Implementation of the AES algorithm using a microcontroller with 3 cores

Cryptography has an important paper nowadays. In terms of privacy, each time a user logs in its Facebook profile, sends a WhatsApp message or revise its bank account online, the data used to have a secure communication is encrypted. The cryptography as we know ciphers the messages using the “End-to-end” principle. It means that the message is encrypted when the issuer sends it and it is decrypted before the receiver gets it, securing the confidentiality of the transmitted information. In this project, it will be studied the AES (Advanced Encryption Standard), an important standard used by the US government to encrypt confidential information in the late 90s. This standard was developed by two Belgian researchers and it was named the Rijndael in honour to its creators, Joan Daemen and Vincent Rijmen. The implementation of this algorithm materialised in the last months of 2000. Nowadays, this standard is obsolete according to the importance it has for the US government. Anyway, it has been shared with the world with purpose that anyone has access to it and learn about the job they did. And it has been the case of the project the reader will enjoy in the next pages. This project will not just talk about the AES. The main objective is to implement it in a multicore board called Shieldbuddy TC275. It contains one powerful microcontroller with three cores and the purpose of this thesis is to make them work simultaneously to reduce the time it takes to encrypt a message. After a brief introduction, the reader will find the body of this report, where initially the mathematical background is explained to make the algorithm understandable. Then, the AES is explained thoroughly from the encryption to the decryption. After that, it is extensively explained how the implementation has been reached among the three cores. Finally, the results will be exposed and the conclusions will be obtained. I personally wish a profitable and entertaining reading to anyone who dedicate its time to this thesis. I hope you enjoy as much as I did when I composed it

The throughput calibration of the VERITAS telescopes

Imaging atmospheric Cherenkov telescopes are continuously exposed to varying weather conditions that have short and long-term effects on their response to Cherenkov light from extensive air showers. This work presents the implementation of a throughput calibration method for the VERITAS telescopes taking into account changes in the optical response and detector performance over time. Different methods to measure the total throughput of the instrument, which depend on mirror reflectivites and PMT camera gain and efficiency, are discussed as well as the effect of its evolution on energy thresholds, effective collection areas, and energy reconstruction. The application of this calibration in the VERITAS data analysis chain is discussed, including the validation using Monte Carlo simulations and observations of the Crab Nebula.Comment: 7 pages, 4 figures, ICRC2021 Conference (Berlin, online

CENTRAL BANKS AS REGULATORS AND SUPERVISORS OF THE FINANCIAL SYSTEM; PARALLEL BETWEEN THE AMERICAN FEDERAL RESERVE SYSTEM AND THE COLOMBIAN BANK OF THE REPUBLIC

The first part of this thesis will focus on the origin and legal nature of the American Federal Reserve System established by the Federal Reserve Act of 1913 and Colombia\u27s Bank of the Republic. Next, I will offer a deep study of the structure of the Federal Reserve System, concentrating on institutions like the Board of Governors, the Federal Reserve Bank, the Federal Open Market Committee, and member banks. The author also describes and analyzes Colombia\u27s Bank of the Republic, placing emphasis on the reforms introduced by the new Constitution. In Chapter IV the main faculties, functions, and operations undertaken by each of these Central Banks will be briefly explained and described. The following chapter will focus on the role of central banks as supervisors and regulators of the financial system, particularly in the United States and Colombia. In this segment, this thesis will focus on other regulators and supervisors of the system and the areas in which the Central Bank of each country is empowered to regulate or supervise. Finally, this study will concentrate on all the arguments in favor of and against regulations and supervision of the financial system by the central banks and the similarities and differences of the American and Colombian systems in these areas

On numerical solution of Fredholm and Hammerstein integral equations via Nyström method and Gaussian quadrature rules for splines

The first author acknowledges partial financial support by the IMAG-Maria de Maeztu grant CEX2020-001105-M/AEI/10.13039/501100011033. The second author has been partially supported by Spanish State Research Agency (Spanish Min-istry of Science, Innovation and Universities) : BCAM Severo Ochoa excellence accreditation SEV-2017-0718 and by Ramon y Cajal with reference RYC-2017-22649. The fourth author is member of GNCS-INdAM.Nyström method is a standard numerical technique to solve Fredholm integral equations of the second kind where the integration of the kernel is approximated using a quadrature formula. Traditionally, the quadrature rule used is the classical polynomial Gauss quadrature. Motivated by the observation that a given function can be better approximated by a spline function of a lower degree than a single polynomial piece of a higher degree, in this work, we investigate the use of Gaussian rules for splines in the Nyström method. We show that, for continuous kernels, the approximate solution of linear Fredholm integral equations computed using spline Gaussian quadrature rules converges to the exact solution for m →∞, m being the number of quadrature points. Our numerical results also show that, when fixing the same number of quadrature points, the approximation is more accurate using spline Gaussian rules than using the classical polynomial Gauss rules. We also investigate the non-linear case, considering Hammerstein integral equations, and present some numerical tests.IMAG-Maria de Maeztu grant CEX2020-001105-M/AEI/10.13039/501100011033Spanish State Research Agency (Spanish Min-istry of Science, Innovation and Universities) SEV-2017-0718Spanish Government RYC-2017-2264

Effect of Industry 4.0 on Education Systems: An Outlook

Congreso Universitario de Innovación Educativa En las Enseñanzas Técnicas, CUIEET (26º. 2018. Gijón