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Search Results: 1 - 10 of 47 matches for " Gamaliel Percino "
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Instrumentational complexity of music genres and why simplicity sells
Gamaliel Percino,Peter Klimek,Stefan Thurner
Computer Science , 2014, DOI: 10.1371/journal.pone.0115255
Abstract: Listening habits are strongly influenced by two opposing aspects, the desire for variety and the demand for uniformity in music. In this work we quantify these two notions in terms of musical instrumentation and production technologies that are typically involved in crafting popular music. We assign a "complexity value" to each music style. A style is complex if it shows the property of having both high variety and low uniformity in instrumentation. We find a strong inverse relation between variety and uniformity of music styles that is remarkably stable over the last half century. Individual styles, however, show dramatic changes in their "complexity" during that period. Styles like "new wave" or "disco" quickly climbed towards higher complexity in the 70s and fell back to low complexity levels shortly afterwards, whereas styles like "folk rock" remained at constant high complexity levels. We show that changes in the complexity of a style are related to its number of sales and to the number of artists contributing to that style. As a style attracts a growing number of artists, its instrumentational variety usually increases. At the same time the instrumentational uniformity of a style decreases, i.e. a unique stylistic and increasingly complex expression pattern emerges. In contrast, album sales of a given style typically increase with decreasing complexity. This can be interpreted as music becoming increasingly formulaic once commercial or mainstream success sets in.
On $k$-Fibonacci sums by matrix methods
Gamaliel Cerda
Mathematics , 2014,
Abstract: In this paper, some $k$-Fibonacci and $k$-Lucas with arithmetic indexes sums are derived by using the matrices $R_{a}=\left[ \begin{array}{lr} L_{k,a} & -(-1)^{a} \\ 1 & 0 \end{array}\right]$ and $S_{a}=\frac{1}{2}\left[ \begin{array}{lr} L_{k,a} & \Delta_{a} \\ 1 & L_{k,a} \end{array}\right]$, where $\Delta_{a}=L_{k,a}^{2}-4(-1)^{a}$. The most notable side of this paper is our proof method, since all the identities used in the proofs of main theorems are proved previously by using the matrices $R_{a}$ and $S_{a}$, with $a$ an natural number. Although the identities we proved are known, our proofs are not encountered in the $k$-Fibonacci and $k$-Lucas numbers literature.
Foreign Direct Investment and Industrial Sector Performance: Assessing the Long-Run Implication on Economic Growth in Nigeria  [PDF]
Emmanuel S. Akpan, Gamaliel O. Eweke
Journal of Mathematical Finance (JMF) , 2017, DOI: 10.4236/jmf.2017.72021
Abstract: This paper aimed at examining the impact of Foreign Direct Investment (FDI) and Industrial Sector Performance on economic growth in Nigeria. This study utilized annual time series data for the period 1981-2015 using elaborate econometric analysis which tests the sensitivity of GDP to shocks in FDI and Industrial Sector Output, using the Impulse Response Functions (IRFs) and Variance Decomposition (VDC) techniques within a Vector Autoregressive (VAR) framework. The Johansen Cointegration test result reveals the absence of a long-run relationship between FDI, Industrial Sector Output and GDP. The result also shows the existence of a bidirectional relationship between FDI and Industrial Sector Output, GDP and Industrial Sector Output, with a unidirectional causality running from FDI to GDP. The VAR estimate shows that FDI had a slight significant positive impact on GDP, while Industrial Sector Output had a small significant positive impact on GDP at present, with a negative relationship observed at previous periods. The impulse response functions clearly reveal that GDP exhibited negative response to shocks in FDI up to the 3rd period, while the effect was positive from the 4th period henceforth, while GDP also exhibited a negative response to shocks in Industrial Sector Output throughout the period observed. The variance decomposition analysis further revealed that GDP was mainly driven by shocks in FDI, with industrial sector output contributing very little. The study concludes that Nigeria is yet to fully reap the benefit of FDI since its contribution to GDP is still very low at the moment, whilst the contribution of the industrial sectorin the country has not be vibrant enough to spur economic growth. The study therefore recommends among other things that social and economic infrastructure be improved as this will help lessen the burden of industrialist and eventually lower the cost of doing business and in turn attract FDI inflow into Nigeria.
Matrix representation of the q-Jacobsthal numbers
Gamaliel Cerda-Morales
Proyecciones (Antofagasta) , 2012,
Abstract: In this paper, we consider a q-Jacobsthal sequence {Jq n},with initial conditions Jq0 = 0 and Jq! = l.Then give a generating matrix for the terms of sequence {Jq fe n| for a positive integer k.With the aid of this matrix, we derive some new identities for the sequence
Rese a de "Extended Statehood in the Caribbean: Paradoxes of Quasi Colonialism, Local Autonomy and Extended Statehood in the USA, French, Dutch and British Caribbean" de Lammert de Jong y Dirk Kruijt (eds.)
Aarón Gamaliel Ramos
Centro Journal , 2008,
Rese a de "Three Ancient Colonies: Caribbean Themes and Variations" de Sidney W. Mintz
Aarón Gamaliel Ramos
Centro Journal , 2010,
Causality between Non-Oil Export, Financial Sector Development and Economic Growth: Evidence from Nigeria  [PDF]
Emmanuel S. Akpan, Eleazar C. Nwosu, Gamaliel O. Eweke
Journal of Mathematical Finance (JMF) , 2017, DOI: 10.4236/jmf.2017.71002
Abstract: This study examined the causality between non-oil export, financial sector development and economic growth in Nigeria. The study employed credit to private sector, total bank deposit, prime lending rate, market capitalization, money market instruments as proxy to measure financial sector development, while GDP was used to capture economic growth, using annual data from 1985 to 2015. All the variables were stationary at first difference using the Augmented Dickey Fuller (ADF) and Phillip Perron (PP) tests. The Johansen Cointegration test result showed that a long-run relationship between non-oil export, financial sector development and economic growth existed. The Granger causality test indicates that a bi-directional causality runs from total bank deposit, credit to the private sector and market capitalization to economic growth. Also, a unidirectional causality existed between prime lending rate and economic growth. The study shows that out of the five proxy for financial sector development, three showed significant causality with economic growth. These findings therefore imply that a bi-directional relationship exists between financial sector development and economic growth, indicating that a growth in the financial sector will cause same in the economy and vice versa. Finally, the study recommends that the government formulate policies that will enhance credit to the private sector, such as not operating the Treasury Single Account (TSA) Policy in a holistic manner, so that banks will have fund to propel their credit delivery function effectively; considering the fact that the public sector drives the Nigerian economy as it stands now. However for capital market development, investors protection policies should be enhanced in order to strengthen and improve public confidence in the capital market, such as reducing charges for the purchase and sale of securities and reduction of listing requirements for new companies on the exchange.
Las posesiones europeas del Caribe post colonial: viejos problemas, nuevas disyuntivas
Aarón Gamaliel Ramos Bonilla
Revista Umbral , 2010,
Abstract: Resumen Al finalizar la Segunda Guerra Mundial, Francia, Holanda y Gran Breta a culminaron el largo periodo de dominación colonial en la región e instalaron nuevas estructuras en sus territorios. Este ensayo explora los problemas y desafíos que enfrentan las posesiones europeas del Caribe contemporáneo. El texto describe las diferentes rutas seguidas por las metrópolis coloniales, los antagonismos actuales entre las metrópolis y sus territorios, y los desafíos que enfrentan en el escenario regional actual. Palabras clave: Colonialismo, Recolonización, Representación, Vulnerabilidad, Unión Europea Abstract At the end of World War II, France, Holland and Britain ended the long period of colonial domination in the region and set up new structures in their territories. This essay explores the problems and challenges facing contemporary European possessions in the Caribbean. The text describes the different routes taken by the colonial metropolis, the existing antagonisms between the metropolitan powers and its territories, and the challenges they face in the current regionalscenario. Keywords: Colonialism, Recolonization, Representation, Vulnerability, European Union
Preparation and Characterization of Rosmarinecine Derivatives
Teresa Mancilla Percino,David Aarón Nieto
Revista de la Sociedad Química de México , 2006,
Abstract: Este trabajo describe la síntesis de 8-tert-butildimetilsililoxi- (3), 2,8-bis(tert-butildimetilsililoxi)- (4) 2-mesiloxi-8-tert-butildimetilsililoxi- (5) y 2-tosiloxirosmarinecina (6) a partir de la protección selectiva de los diferentes grupos hidroxilo de la rosmarinecina 2, la cual se obtiene por hidrólisis de la rosmarinina 1. La rosmarinina 1 que se encuentra naturalmente se aisló en buen rendimiento (0.66%) de Senecio callosus. La quimioselectividad de la sililación de los grupos hidroxilo en la posiciones C-2 y C-8 de 2 fue controlada por el tiempo de reacción, el cual mostró mayor reactividad del grupo hidroxilo primario que el secundario, así como la estereoquímica del grupo en la posición 1, el cual se encuentra trans y cis a los grupos hidroxilos en las posiciones 2 y 7, respectivamente, donde el efecto estérico del grupo hidroxilo en la posición 7 es evidenciado y posible efecto del disolvente. Los compuestos fueron caracterizados por espectroscopia de RMN de 1H, 13C, 1H-1H COSY, HETCOR, infrarrojo y espectrometría de masas
Busseman functions for the N-body problem
Boris Percino,Héctor Sánchez Morgado
Mathematics , 2013, DOI: 10.1007/s00205-014-0748-7
Abstract: We prove that the Busemann function of the parabolic homotetic motion for a minimal central coniguration of the N-body problem is a viscosity solution of the Hamilton-Jacobi equation and that its calibrating curves are asymptotic to the homotetic motion.
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