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Shifted Appell sequences in Clifford analysis
Dixan Pea Pea
Mathematics , 2011,
Abstract: This paper is a continuation of [D. Pe\~{n}a Pe\~{n}a, On a sequence of monogenic polynomials satisfying the Appell condition whose first term is a non-constant function, arXiv:1102.1833], in which we prove that for every monogenic polynomial $\mathbf{P}_k(x)$ of degree $k$ in $\mathbb R^{m+1}$ there exists a sequence of monogenic polynomials $\{M_n(x)\}_{n\ge0}$ satisfying the Appell condition such that $M_0(x)=\mathbf{P}_k(x)$.
On a sequence of monogenic polynomials satisfying the Appell condition whose first term is a non-constant function
Dixan Pea Pea
Mathematics , 2011,
Abstract: In this paper we aim at constructing a sequence $\{\mathsf{M}_n^k(x)\}_{n\ge0}$ of $\mathbb R_{0,m}$-valued polynomials which are monogenic in $\mathbb R^{m+1}$ satisfying the Appell condition (i.e. the hypercomplex derivative of each polynomial in the sequence equals, up to a multiplicative constant, its preceding term) but whose first term $\mathsf{M}_0^k(x)=\mathbf{P}_k(\underline x)$ is a $\mathbb R_{0,m}$-valued homogeneous monogenic polynomial in $\mathbb R^m$ of degree $k$ and not a constant like in the classical case. The connection of this sequence with the so-called Fueter's theorem will also be discussed.
Neurovascular Evaluation in Eugonadal Men with Type 2 Diabetes Mellitus and Erectile Disfunction: A Comparative Study between Responders and Not Responders to Phosphodiesterase 5 Inhibitors  [PDF]
Marcelo Rodriguez Pea, Elizabeth Ovando
Advances in Sexual Medicine (ASM) , 2015, DOI: 10.4236/asm.2015.54010
Abstract: The aim of our study was to evaluate functional alterations of the corpus cavernusum and its correlation with the lack of response to treatment with PDE5i in eugonadal patients with Type 2 Diabetes Mellitus and Erectile Dysfunction. In this prospective randomized study we included 157 patients. All were treated with 5 mg tadalafil daily and 100 mg sildenafil on demand and the response to treatment was assessed in 6 month by dividing them into 2 groups: G1: Good response. Significative improvement of erectile function according to IIEF-5, and G2: There was not an improvement with the treatment. At the end of the treatment we performed neurological and vascular studies to both groups. Also we performed CC-EMG in order to evaluate penile autonomic neuropathy. 82 patients were included in G1 and 75 in G2. The time evolution of the ED was 1.5 years for G1 and 5 years for G2. Average fasting glucose and glycosilated hemoglobin values were significantly higher in G2 than in G1. Also we observed significant differences in penile vascular parameters between both groups. Peripheral neuropathy parameters did not show differences between both groups. Cavernous smooth muscle electromyography showed asynchronous and asymetric potentials in G1 (minimal autonomic neuropathy) and denervation potentials in G2 characteristic of severe CC damage. It is concluded that vascular and autonomic alterations are causes of severe CC damage and lack of response to treatment with PDE5i in this population. Peripheral neuropathy is not part of this process.
OBTENCIóN DE MODELOS PARA LA DETERMINACIóN DE LA EVAPOTRANSPIRACIóN DE REFERENCIA EN CONDICIONES DE CLIMA SUBHúMEDO SECO EN LAS TUNAS, CUBA
Santana Pea,Leyder; Pea Pea,Esteban;
Idesia (Arica) , 2010, DOI: 10.4067/S0718-34292010000100008
Abstract: to estimate the reference evaporation-perspiration (eto) in the north area of las tunas in cuba , it was carried out a study about its dynamics and was compared with the potential evaporation-perspiration (etp) measure in lysimeter. there were used the methods of penman-monteith (pm), turc (t), hargreaves samani (hs), thorntwaite (th), blaney criddle (bc) and blaney morin (bm). the equations that better reflected the real behavior of the reference evaporation-perspiration in the north of the tunas were those of hargreaves samani, penman monteith, turc and blaney morin. a high direct correlation was obtained among the evaporation-perspiration of calculated reference and the variables of the climate: half temperature, heatstroke and evaporation. eight regression equations were obtained for the calculation of the reference evaporation-perspiration, feasible of being able to be used in the calculation of the hydrics necessities of the crops under the conditions of the north of las tunas.
OBTENCIóN DE MODELOS PARA LA DETERMINACIóN DE LA EVAPOTRANSPIRACIóN DE REFERENCIA EN CONDICIONES DE CLIMA SUBHúMEDO SECO EN LAS TUNAS, CUBA GETTING MODELS TO DETERMINE THE REFERENCE EVAPORATION-PERSPIRATION UNDER SUBHUMID-DRY WEATHER CONDITIONS IN LAS TUNAS, CUBA
Leyder Santana Pea,Esteban Pea Pea
IDESIA , 2010,
Abstract: Para estimar la evapotranspiración de referencia (ETo) en la zona norte de Las Tunas en Cuba, se realizó un estudio en el que se comparó su dinámica en la zona y se comparó con la evapotranspiración potencial (ETp) medida en lisímetro. Se emplearon los métodos de Penman Monteith (PM), Turc (T), Hargreaves Samani (HS), Thorntwaite (Th), Blaney Criddle (BC) y Blaney Morin (BM). Las fórmulas que mejor reflejaron el comportamiento real de la evapotranspiración de referencia en el norte de Las Tunas fueron la de Hargreaves Samani, Penman Monteith, Turc y Blaney Morin. Se obtuvo una alta correlación directa entre la evapotranspiración de referencia calculada y las variables del clima: temperatura media, insolación y evaporación. Se obtuvieron ocho ecuaciones de regresión para el cálculo de la evapotranspiración de referencia, factibles de poder utilizarse en el cálculo de las necesidades hídricas de los cultivos en las condiciones del norte de Las Tunas. To estimate the reference evaporation-perspiration (ETo) in the north area of Las Tunas in Cuba , it was carried out a study about its dynamics and was compared with the potential evaporation-perspiration (ETP) measure in lysimeter. There were used the methods of Penman-Monteith (PM), Turc (T), Hargreaves Samani (HS), Thorntwaite (Th), Blaney Criddle (BC) and Blaney Morin (BM). The equations that better reflected the real behavior of the reference evaporation-perspiration in the north of The Tunas were those of Hargreaves Samani, Penman Monteith, Turc and Blaney Morin. A high direct correlation was obtained among the evaporation-perspiration of calculated reference and the variables of the climate: half temperature, heatstroke and evaporation. Eight regression equations were obtained for the calculation of the reference evaporation-perspiration, feasible of being able to be used in the calculation of the hydrics necessities of the crops under the conditions of the north of Las Tunas.
Rese a de "Propiedades del primer sistema de teledetección hiperespectral chileno"
Marco A. Pea
Revista de Geografía, Norte Grande , 2010,
Abstract:
Flora intestinal, probióticos, prebióticos, simbióticos y alimentos novedosos Intestinal flora, probiotics, prebiotics, synbiotics and novel foods
A. S. Pea
Revista Espa?ola de Enfermedades Digestivas , 2007,
Abstract:
El significado de las mutaciones de CARD15 en la enfermedad de Crohn: La contribución espa ola The significance of CARD15 mutation in Crohn′disease: The Spanish contribution
A. S. Pea
Revista Espa?ola de Enfermedades Digestivas , 2007,
Abstract:
Personalized medicine: inevitable Medicina personalizada: inevitable
A. S. Pea
Revista Espa?ola de Enfermedades Digestivas , 2010,
Abstract:
Cultural Differences and the Construction of Meaning
Robert A. Pea
Education Policy Analysis Archives , 1997,
Abstract: The relationships between student achievement, student culture and practitioners' attitudes and expectations were investigated. Student achievement was defined as academic performance but also included perceptions, rationales and explanations for student behaviors and conduct. Student culture described student's Mexican American origins, customs and beliefs. Practitioners' attitudes described how middle school personnel perceived Mexican American high and underachieving students generally, and practitioners' expectations described how personnel interacted and behaved toward Mexican American students. Results indicated that Mexican American students perceived themselves and school personnel perceived these students as different from Anglo students. Mexican American cultural traditions were also perceived as inferior and disadvantageous by high achieving Mexican American students and by personnel. Underachieving Mexican American students generally valued their cultural traditions more positively than high achieving students becoming resistant to learning when these traditions were marginalized in school. Student achievement was also related to student compliance, student appearance, styles in written and verbal communication and practitioners' perceptions about the willingness of Mexican American students to practice and support Anglo norms. These findings are congruent with theories that discuss relationships between student achievement, student culture and practitioners' attitudes and expectations. Theories about school failure occurring less frequently in minority groups that are positively oriented toward their own and the dominant culture were contradicted and not supported in this research.
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