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Search Results: 1 - 10 of 724758 matches for " Juan A. López-Nú?ez "
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Accomplishments in Learning Self-Regulation in Personal Environments  [PDF]
Eduardo Chaves-Barboza, Juan M. Trujillo-Torres, Juan A. López-Nú?ez
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.611109
Abstract: This article aims to analyze the accomplishments in learning self-regulation from a student popu-lation in personal learning environments. A Likert scale-like questionnaire is applied to a random cluster sample of students from the Pedagogy, Social Education and Psychopedagogy degrees from the University of Granada, Spain. Descriptive or inferential analyses are carried out along the research in order to characterize the population. Additionally, Kendall’s correlation coefficients are calculated and interpreted to define the relations among students’ accomplishments. Finally, Kruskal-Wallis H tests are performed to ascertain through analysis of variance if the variable degree influences such accomplishments. The results show that the students from these three degrees set goals, perform tasks in an organized manner, accomplish extra work on time, meet the deadlines to hand in the class-work, and reflect on their learning. Pedagogy presents the highest relation between achieving an appropriate period of time to perform the tasks and carrying out their extra work on time. Social Education shows a smaller number of students and less intensity when meeting the deadlines to hand in the classwork. The students from Psychopedagogy have the highest accomplishments in reading the whole material suggested by the teacher. The research concludes that, although there are some variations among these three degrees, they are homo-geneous in the majority of the variables studied here. The students succeeded in learning self-regulation; however, it is necessary to reinforce the time planning, the reading of the material suggested by the teacher, enhancement of knowledge, and complementary research. One student subgroup is distinguished for its accomplishments in task organization and performance, while other groups excel for deepening their understanding of the units and metacognition.
Efecto de dos nematodos entomopatógenos sobre Cosmopolites sordidus (Coleoptera: Dryophthoridae)
SEPúLVEDA-CANO,PAULA A; LóPEZ-Nú?EZ,JUAN C; SOTO-GIRALDO,ALBERTO;
Revista Colombiana de Entomología , 2008,
Abstract: abstract : the black plantain weevil cosmopolites sordidus is one of the pests that most severely damages this crop. entomopathogenic nematodes (en) of the genera steinernema and heterorhabditis are biological control agents of the insect with the possibility of being incorporated into ipm programs. the objective of this study was to evaluate the virulence of steinernema carpocapsae all strain and heterorhabditis bacteriophora on adults and last instar larvae of the weevil. the bioassay used was individual infection in multiple well plates with paper filter in concentrations of 10, 100, and 1.000 infective juveniles (ij)/25 ml. every 12 h the number of dead individuals per plate was recorded up to a maximum of 120 h for larvae and 228 h for adults. the cadavers were put in a drying chamber (development of the nematode inside the insect) and later in a “white chamber” (emergence of ij). the variables studied were mortality of the stages, ij multiplication and emergence duration. under the conditions evaluated, both adults and larvae were susceptible to the attack of both nematodes, responding differentially to the increase of dose. typical symptoms of infection and multiplication in larvae were observed for the nematode species evaluated. conditions such as the limited niche of the insect and high humidity in plantain corms that are favorable for nematode survival, as well as the high mortality registered with low ij concentrations and the capacity to develop especially in the larvae, make these agents promising tools for the control of the pest in the field.
Efecto de dos nematodos entomopatógenos sobre Cosmopolites sordidus (Coleoptera: Dryophthoridae) Effect of two enthomopathogenic nematodes on Cosmopolites sordidus (Coleoptera: Dryophthoridae)
PAULA A SEPúLVEDA-CANO,JUAN C LóPEZ-Nú?EZ,ALBERTO SOTO-GIRALDO
Revista Colombiana de Entomología , 2008,
Abstract: Resumen: El picudo negro del plátano Cosmopolites sordidus es una de las plagas que mayores da os causa al cultivo. Especies de nematodos entomopatógenos de los géneros Steinernema y Heterorhabditis son agentes biológicos de control del insecto, con posibilidad de incorporarse a programas MIP. El objetivo del trabajo fue evaluar la virulencia de Steinernema carpocapsae, y Heterorhabditis bacteriophora, sobre adultos y larvas de último instar de picudo. El bioensayo utilizado fue el de infección individual en platos multipozo con papel filtro, en concentraciones de 10, 100 y 1.000 juveniles infectivos (JI)/25 ml. Con frecuencia de 12 h se registró el número de individuos muertos por plato hasta un tiempo máximo de 120 h para larvas y 228 h para adultos. Los cadáveres se pasaron a cámara seca (desarrollo del nematodo dentro del insecto) y posteriormente a cámara “white” (emergencia de JI). Las variables evaluadas fueron mortalidad de estados, multiplicación de JI y duración de emergencia. Bajo las condiciones evaluadas, tanto adultos como larvas fueron susceptibles al ataque ambos nematodos, respondiendo diferencialmente al aumento de la dosis. Se evidenció sintomatología de infección y multiplicación en larvas, de las especies de nematodos evaluadas. Condiciones como nicho limitado del insecto y alta humedad en los cormos de plátano favorables para la sobrevivencia del nematodo, unidos a la mortalidad registrada con bajas concentraciones de JI y a la capacidad de desarrollarse especialmente en larvas, convierten a estos agentes en herramienta promisoria para el control de la plaga en campo. Abstract : The black plantain weevil Cosmopolites sordidus is one of the pests that most severely damages this crop. Entomopathogenic nematodes (EN) of the genera Steinernema and Heterorhabditis are biological control agents of the insect with the possibility of being incorporated into IPM programs. The objective of this study was to evaluate the virulence of Steinernema carpocapsae All Strain and Heterorhabditis bacteriophora on adults and last instar larvae of the weevil. The bioassay used was individual infection in multiple well plates with paper filter in concentrations of 10, 100, and 1.000 infective juveniles (IJ)/25 ml. Every 12 h the number of dead individuals per plate was recorded up to a maximum of 120 h for larvae and 228 h for adults. The cadavers were put in a drying chamber (development of the nematode inside the insect) and later in a “white chamber” (emergence of IJ). The variables studied were mortality of the stages, IJ multiplication and emergence
Universidades populares en Espa?a y su relación con la universidad suramericana
López-Nú?ez,Juan Antonio; Lorenzo-Martín,Manuel Enrique;
Educación y Educadores , 2009,
Abstract: this study outlines the aspects that are crucial to understanding the popular university project begun in spain in 1901. after a brief historical analysis, its present situation is explained against the backdrop of adult education as an in-depth philosophy, and the project is shown to be valid even today, in our society. the primary feature of the project is its organization in the form of a network, not only nationwide, but in terms of its relationship with other popular universities, particularly those in south america, which constitute its main source of work. although it was established more than one hundred years ago in europe and south america, the project continues to be an institution for adult education that offers an unusual form of training adapted entirely to the needs of its students.
Universidades populares en Espa a y su relación con la universidad suramericana Universidades populares em Espanha e sua rela o com a universidade sul-americana Popular Universities in Spain and their Relationship with South American Universities
Juan Antonio López-Nú?ez,Manuel Enrique Lorenzo-Martín
Educación y Educadores , 2009,
Abstract: El trabajo presenta las claves para entender el Proyecto Universidad Popular, iniciado en Espa a en 1901. Tras analizar brevemente su pasado, se explica su presente a través de la educación de adultos como filosofía de fondo, y se hace ver que en la actualidad no deja de estar vigente en nuestra sociedad. La principal nota característica de este proyecto es su organización en red, no solo a nivel nacional, sino que sus relaciones con otras universidades populares, sobre todo de Suramérica, constituyen su principal fuente de trabajo. A pesar de sus más de cien a os de existencia en Europa y Suramérica, en la actualidad el proyecto es toda una institución de educación de adultos, por su peculiar oferta formativa, totalmente adaptada a las necesidades de sus alumnos. Este trabalho apresenta a clave para compreender o Projeto Universidade Popular, que come ou em Espanha em 1901. Depois analisar seu passado, explica-se seu presente através da educa o de adultos como filosofia de fundo, e descobre-se que na atualidade é em vigor na nossa sociedade. A característica principal deste projeto é sua organiza o em rede nacional. Suas rela es com outras universidades populares, especialmente da América do Sul, s o sua fonte de trabalho fundamental. No entanto sua antigüidade de mais de cem anos em Europa e América do Sul, na atualidade o projeto é uma institui o de educa o de adultos por sua particular forma de oferta de forma o, adaptada as necessidades dos alunos. This study outlines the aspects that are crucial to understanding the Popular University Project begun in Spain in 1901. After a brief historical analysis, its present situation is explained against the backdrop of adult education as an in-depth philosophy, and the project is shown to be valid even today, in our society. The primary feature of the project is its organization in the form of a network, not only nationwide, but in terms of its relationship with other popular universities, particularly those in South America, which constitute its main source of work. Although it was established more than one hundred years ago in Europe and South America, the project continues to be an institution for adult education that offers an unusual form of training adapted entirely to the needs of its students.
Eficacia de entomonematodos para controlar estados de Aeneolamia varia (Hemiptera: Cercopidae) bajo condiciones de invernadero Efficiency of entomonematodes for controlling Aeneolamia varia (Hemiptera: Cercopidae) stages under controlled conditions
MIRIAM ROSERO-GUERRERO,ALEX ENRIQUE BUSTILLO-PARDEY,JUAN CARLOS LóPEZ-Nú?EZ,ULISES CASTRO-VALDERRAMA
Revista Colombiana de Entomología , 2012,
Abstract: Aeneolamia varia se registró en cultivos de ca a en el Valle del Cauca entre 2007 y 2008 y sus infestaciones se extendieron a 25.000 ha, amenazando así la industria azucarera y panelera. Debido a esta situación, se inició una investigación con nematodos entomopatógenos, para evaluarlos en el control de esta plaga. Se evaluaron las especies Steinernema colombiense, Steinernema websteri, Steinernema sp.1, Steinernema sp.2, Heterorhabditis bacteriophora yuna especie de Steinernema codificada como O1R1, en dosis de 100 y 1.500 juveniles infectivos (JI)/cm2 de área asperjada, sobre estadios ninfales de A. varia en plántulas de ca a de azúcar en invernadero. El estado adulto se evaluó bajo condiciones de laboratorio empleando 100 JI/cm2 y los sistemas de bioensayo en cajas Petri y cilindros. El tercer estadio ninfal fue el menos susceptible y el cuarto fue el más susceptible a H. bacteriophora, presentando mortalidad de 89,1% con 100 JI/cm2. El estado adulto tuvo una mortalidad de 100% con todas las especies de nematodos evaluadas en el bioensayo en cajas Petri, mientras que en los cilindros la mortalidad varió entre 40 y 54%. El experimento para evaluar la habilidad de las especies de nematodos, para buscar el hospedero A. varia, reveló que todas son capaces de encontrar sus ninfas, pero H. bacteriophora y Steinernema sp.1 fueron las más eficaces causando mortalidades del 46% y 30%, respectivamente. Aeneolamia varia was reported in sugar cane crops in the Cauca Valley between 2007 and 2008 and its infestations extended to 25,000 ha, thereby threatening the sugar and "panela" industries. Given this situation, research was initiated on entomopathogenic nematodes in order to evaluate them for control of this pest. We evaluated the species Steinernema colombiense, Steinernema websteri, Steinernema sp.1, Steinernema sp.2, Heterorhabditis bacteriophora and a species of Steinernema coded as O1R1 in doses of 100 and 1,500 infective juveniles (IJ)/cm2 of spray area on the nymphal instars of A. varia in sugar cane seedlings under greenhouse conditions. The adult stage was evaluated under laboratory conditions using 100 IJ/cm2 and bioassay systems in Petri dishes and cylinders. The third nymphal instar was the least susceptible and the fourth instar was the most susceptible to H. bacteriophora, presenting a mortality of 89.1% with 100 IJ/cm2. The adult stage had 100% mortality with all nematode species tested under bioassay conditions with Petri dishes, while in cylinders the mortality varied between 40 and 54%. The experiment to demonstrate the ability of the nematode
Goal orientations in sport: a causal model Orientaciones de Meta en el deporte: un modelo causal
Francisco P. Holgado,Leandro Navas,Manuela López-Nú?ez
European Journal of Education and Psychology , 2010,
Abstract: The study is based on research work relating goal orientation in sport with contextual variables and personal variables. The sample was 511 professional athletes. A “causal” model is proposed in which task and goal ego orientations are the dependent variables. A hypothetical model is obtained using structural equations modelling, supporting that: a) athletes who find satisfaction experimenting mastery, who perceive a motivational climate that rewards hard work and who believe that success depends on their effort, develop task goal orientation; and b) athletes who get satisfaction demonstrating greater capacity than the rest, who live a motivational climate that leads them to be better than the others and that only rewards the best players, and whose main motive for practising sport is to achieve certain social status and popularity, will have an ego goal orientation. Este trabajo parte de las investigaciones que relacionan las orientaciones de meta en el deporte con variables contextuales, como el clima motivacional percibido, y con variables personales, tales como la satisfacción con los resultados deportivos, las creencias relacionadas con los factores implicados en la obtención del éxito y los motivos por lo que se practica deporte. La muestra está compuesta por 511 deportistas profesionales. Se llevan a cabo análisis de regresión múltiple y se propone un modelo causal en el que las variables a predecir son las orientaciones de meta, a la tarea y al ego. Con ecuaciones estructurales se contrasta un modelo hipotético, que presenta un ajuste adecuado, y que defiende que: a) el deportista que encuentra la satisfacción experimentando maestría, que percibe un clima motivacional que premia el trabajo duro y que cree que el éxito depende de su esfuerzo, desarrolla una orientación de meta a la tarea: y b) que el deportista que obtiene satisfacción demostrando mayor capacidad que los demás, que vive un clima motivacional que le conduce a superar a los otros y que recompensa sólo a los mejores jugadores, y que el principal motivo para practicar deporte es alcanzar un determinado estatus social y popularidad, tendrá una orientación de meta al ego.
Analysis of Quality Models Applied in Non-Formal Education: Non-Governmental Organizations and Nonprofit Organizations  [PDF]
Alfonso Conde Lacárcel, Juan Antonio López Nú?ez, María Angustias Hinojo Lucena
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.36015
Abstract: The article is part of the research project entitled “The Implementation of Educational Quality Standards for Non-Formal Education: Non-governmental organizations (NGOs), Partnerships dedicated to working with socially excluded groups”. The project was supported by the Research Plan of the University of Granada. It’s an initial study on the degree of implantation of quality models in Non-governmental organizations and Non Profit Organizations (NGOs and NPOs), and methodology of work developed in non-formal educational activities in the city of Granada (Andalusia, Spain). We have pursued a mixed methodology quasi-experimental descriptive for a random sample of 9 class organizations of the third sector of social action, using two questionnaires specifically created from already validated and a set of semi-structured interviews to complete the information. The obtained results offer us a poor implementation of the EFQM model of European Foundation for Quality Management in this kind of micro organizations and the need for optimization of internal work process face of accountability, improvement of services and the achievement of its objectives.
Hypertension Unusual Cause  [PDF]
Ana Belén Hernández Cascales, Alicia Hernández Torres, María ángeles Ibá?ez Gil, Pedro Pujante Alarcón, Alfonso López Ruiz, María Dolores Hellín Gil, Juan Mayor Barrancos
Pharmacology & Pharmacy (PP) , 2014, DOI: 10.4236/pp.2014.51001
Abstract:


We expose a case of a woman with hypertension and hypokalemia. The differential diagnosis should include primary hyperaldosteronism, diuretics or lazantes intake, secondary hyperaldosteronism. In this patient, additional tests performed show no cause of hormonal disruption and the whole picture is due to a high intake of licorice. Glycyrrhetinic acid, the active component of licorice, inhibits renal IIbeta-hydroxisteroid dehydrogenase. This allows cortisol to stimulate mineralocorticoid receptors. Licorice ingestion should be considered in the differential diagnosis of hypertension with hypokalemia.


Boldina disminuye la apoptosis miocárdica post isquemia reperfusión en la rata
López,René; Arismendi,Marlene; Sáez,Juan Carlos; Godoy,Iván; Ocaranza,María Paz;
Revista chilena de cardiología , 2011, DOI: 10.4067/S0718-85602011000200008
Abstract: background: ischemia / reperfusion (ir) is relevant in the myocardial loss of cardiomyocytes through apoptosis. during ir, hemi channels (hc) allow the entry of proapoptotic substances to the cell. boldine, a compound extracted from peumus boldus, has proven to be antioxidant and to block hc. objective: to determine the effect of boldine on cardiomyocyte apoptosis in rats subjected to ir. methods: male rats, body weight (bw) 200 g, were subjected to reversible ligation of the left coronary artery for 30 minutes (i) and subsequent reperfusion (r) for 24 hours. a subset of these animals (ir+b) received an intraventricular dose of boldine (40mg/kg) and then two doses via gavage (75 mg/kg) at 30 and 60 minutes post-r. sham operated rats (s) receiving the same treatment were used as controls. we determined body weight (bw), relative heart mass (rhm) and systolic blood pressure (sbp). percentage of apoptotic cardiomyocytes (cmap), other apoptotic cells (ocap) and total apoptotic cells (tcap) were determined by tunel. activation of metalloproteinases (mmps) 2 and 9 was determined by zymography and mcp-1 mrna levels by rt-pcr. results: compared to ir alone, ir+boldine did not change bw or rcm, but significantly decreased pas, tcap (71 ± 2.4 vs 57 ± 1.5, p=0.016) and cmap (69 ± 1.5 vs 44 ± 0.4, p=0.016). no difference was observed in the ocap, mmps activity and mcp-1 mrna levels. conclusions: boldine decreased sbp and post-ir cardiomyocyte apoptosis without effect on other cells. this effect was not mediated by mmps activity or mcp-1 gene expression.
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