Análisisis filogenético en la música

En este artículo preconiza el uso de ciertas herramientas matemáticas e informáticas como parte del análisis musical. Presentamos dos ejemplos de análisis musical con árboles filogenéticos: el flamenco y sus métricas ternarias, y la pieza Clapping Music, de Steve Reich, arquetipo de obra minimalista. Somos conscientes de que entre ciertos analistas de la música y musicólogos no gozan estos métodos de gran popularidad. No abogamos por la sustitución de los métodos tradicionales de análisis, sino por la incorporación de estas nuevas herramientas

Analytical Modeling of Interference Aware Power Control for the Uplink of Heterogeneous Cellular Networks

Inter-cell interference is one of the main limiting factors in current Heterogeneous Cellular Networks (HCNs). Uplink Fractional Power Control (FPC) is a well known method that aims to cope with such limiting factor as well as to save battery live. In order to do that, the path losses associated with Mobile Terminal (MT) transmissions are partially compensated so that a lower interference is leaked towards neighboring cells. Classical FPC techniques only consider a set of parameters that depends on the own MT transmission, like desired received power at the Base Station (BS) or the path loss between the MT and its serving BS, among others. Contrary to classical FPC, in this paper we use stochastic geometry to analyze a power control mechanism that keeps the interference generated by each MT under a given threshold. We also consider a maximum transmitted power and a partial compensation of the path loss. Interestingly, our analysis reveals that such Interference Aware (IA) method can reduce the average power consumption and increase the average spectral efficiency. Additionally, the variance of the interference is reduced, thus improving the performance of Adaptive Modulation and Coding (AMC) since the interference can be better estimated at the MT.Comment: 13 pages, 1 table and 7 figures. This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessibl

Implantación de metodologías de planificación estratégica en la universidad, identificación de indicadores y medición de activos intangibles

Después del largo camino recorrido esta última década en la implantación de los programas de calidad en el sistema universitario español, se mantiene cierta incertidumbre sobre el grado de influencia de dichos programas en la toma de decisiones. En ese contexto se ha diseñado un estudio prospectivo, mediante la aplicación de la técnica de investigación social Delphi, con objeto de evaluar el grado de implantación de la metodología del Cuadro de Mando Integral (Balanced Scorecard) en las universidades de la Comunidad de Madrid, así como averiguar la opinión del grupo de expertos sobre la posibilidad de condensación de los indicadores y sobre la medición de activos intangibles. En la comunicación propuesta se incluirá un análisis de las conclusiones obtenidas

The Distance Geometry of Music

We demonstrate relationships between the classic Euclidean algorithm and many other fields of study, particularly in the context of music and distance geometry. Specifically, we show how the structure of the Euclidean algorithm defines a family of rhythms which encompass over forty timelines (\emph{ostinatos}) from traditional world music. We prove that these \emph{Euclidean rhythms} have the mathematical property that their onset patterns are distributed as evenly as possible: they maximize the sum of the Euclidean distances between all pairs of onsets, viewing onsets as points on a circle. Indeed, Euclidean rhythms are the unique rhythms that maximize this notion of \emph{evenness}. We also show that essentially all Euclidean rhythms are \emph{deep}: each distinct distance between onsets occurs with a unique multiplicity, and these multiplicies form an interval $1,2,...,k-1$. Finally, we characterize all deep rhythms, showing that they form a subclass of generated rhythms, which in turn proves a useful property called shelling. All of our results for musical rhythms apply equally well to musical scales. In addition, many of the problems we explore are interesting in their own right as distance geometry problems on the circle; some of the same problems were explored by Erd\H{o}s in the plane.Comment: This is the full version of the paper: "The distance geometry of deep rhythms and scales." 17th Canadian Conference on Computational Geometry (CCCG '05), University of Windsor, Canada, 200

Characterization and Melodic Similarity of A Cappella Flamenco Cantes

This paper intends to research on the link between musical similarity and style and sub-style (variant) classification in the context of flamenco a cappella singing styles. Given the limitation of standard computational models for melodic characterization and similarity computation in this particular context, we have proposed a specific set of melodic features adapted to flamenco singing styles. In order to evaluate them, we have gathered a collection of music recordings from the most representative singers and have manually extracted those proposed features. Based on those features, we have defined a similarity measure between two performances and have validated their usefulness in differentiating several styles and variants. The main conclusion of this work is the need to incorporate specific musical features to the design of similarity measures for flamenco music so that flamencoadapted MIR systems can be develope

The logarithmic spiral, autoisoptic curve

In the Line of Investigation that in the department of “Technical Drawing” in the School of Agriculture Engineering of Madrid, we carry out on the study of The Technical Curves and his singularities, we demonstrate an interesting property of the Logarithmic Spiral. The demonstrated property consists of which the logarithmic spiral is a autoisoptic curve, that is to say that if from a point P anyone of the spiral tangent straight lines draw up to the previous arc, these form a constant angle α. This demonstration is novel and in addition we get to contribute a method to calculate the angle α given the equation of the spiral

Perception of Rhythmic Similarity in Flamenco Music: Comparing Musicians and Non-Musicians.

Background in Music Psychology. Previous research on rhythmic perception has highlighted differences between novice listeners and musicians in their ability to label perceived differences as well as strategies for representing musical structures. Novice listeners tend to focus on “surface” features while musicians tend to focus on the underlying rhythmic structure and develop a specific vocabulary. Furthermore, there is evidence that changes in tempo affect novices’ perception of rhythm

EVA: EVAluating at-home rehabilitation exercises using augmented reality and low-cost sensors

Over one billion people in the world live with some form of disability. This is incessantly increasing due to aging population and chronic diseases. Among the emerging social needs, rehabilitation services are the most required. However, they are scarce and expensive what considerably limits access to them. In this paper, we propose EVA, an augmented reality platform to engage and supervise rehabilitation sessions at home using low-cost sensors. It also stores the user’s statistics and allows therapists to tailor the exercise programs according to their performance. This system has been evaluated in both qualitative and quantitative ways obtaining very promising results.This work has been supported by the Spanish Government TIN2016-76515R Grant, supported with Feder funds. Edmanuel Cruz is funded by a Panamenian grant for Ph.D. studies IFARHU and SENACYT 270-2016-207. This work has also been supported by a Spanish grant for PhD studies ACIF/2017/243 and FPU16/00887. Thanks also to Nvidia for the generous donation of a Titan Xp and a Quadro P6000

Comparative Melodic Analysis of A Cappella Flamenco Cantes.

Background in ethnomusicology and music analysis. A cappella singing styles (called cantes in the flamenco jargon) are among the most fundamental song styles within the flamenco repertoire. Until very recently, flamenco singers have been only using oral transmission to learn them. Because of this form of diffusion, melody has become one of the main musical facets to be listened to, remembered, elaborated and spread in flamenco singing styles. Moreover, melody has helped flamenco enthusiasts to remember and identify variants of a particular style or genre. A frequent discussion and unanswered question among flamenco scholars is how to quantify the similarity between two melodies, and how to use this similarity measure to differentiate different styles and variants among performers, and to study the roots and evolution of flamenco styles