Selective N-monomethylation of aniline over Zn1-xNixFe2O4 (x=0, 0.2, 0.5, 0.8 and 1) type systems

The reaction of aniline with methanol was carried out over Zn1-xNixFe2O4 (x= 0, 0.2, 0.5, 0.8 and 1) type systems in a fixed-bed down-flow reactor. It was observed that systems possessing low ``x'' values are highly selective and active for mono N-alkylation of aniline leading to N-methyl aniline. Selectivity for N-methyl aniline over ZnFe2O4 was more than 99% under the optimized reaction conditions. Even at methanol to aniline molar ratio of 2, the yield of N-methyl aniline was nearly 55.5%, whereas its yield exceeded 67% at the molar ratio of 7. The Lewis acid sites of the catalysts are mainly responsible for the good catalytic performance. Cation distribution in the spinel lattice influences their acido-basic properties, and hence, these factors have been considered as helpful to evaluate the activity and stability of the systems.

The quantum effects in quadratically damped systems

A dynamical system with a damping that is quadratic in velocity is converted into the Hamiltonian format using a nonlinear transformation. Its quantum mechanical behaviour is then analysed by invoking the Gaussian effective potential technique. The method is worked out explicitly for the Duffing oscillator potential.

Microstructural evolution of primary crystallization in diffusion-controlled grain growth

A model has been developed for evaluating grain size distributions in primary crystallizations where the grain growth is diffusion controlled. The body of the model is grounded in a recently presented mean-field integration of the nucleation and growth kinetic equations, modified conveniently in order to take into account a radius-dependent growth rate, as occurs in diffusion-controlled growth. The classical diffusion theory is considered, and a modification of this is proposed to take into account interference of the diffusion profiles between neighbor grains. The potentiality of the mean-field model to give detailed information on the grain size distribution and transformed volume fraction for transformations driven by nucleation and either interface- or diffusion-controlled growth processes is demonstrated. The model is evaluated for the primary crystallization of an amorphous alloy, giving an excellent agreement with experimental data. Grain size distributions are computed, and their properties are discussed.

Service quality and reliability assessment of mobile communication infrastructure

The service quality of any sector has two major aspects namely technical and functional. Technical quality can be attained by maintaining technical specification as decided by the organization. Functional quality refers to the manner which service is delivered to customer which can be assessed by the customer feed backs. A field survey was conducted based on the management tool SERVQUAL, by designing 28 constructs under 7 dimensions of service quality. Stratified sampling techniques were used to get 336 valid responses and the gap scores of expectations and perceptions are analyzed using statistical techniques to identify the weakest dimension. To assess the technical aspects of availability six months live outage data of base transceiver were collected. The statistical and exploratory techniques were used to model the network performance. The failure patterns have been modeled in competing risk models and probability distribution of service outage and restorations were parameterized. Since the availability of network is a function of the reliability and maintainability of the network elements, any service provider who wishes to keep up their service level agreements on availability should be aware of the variability of these elements and its effects on interactions. The availability variations were studied by designing a discrete time event simulation model with probabilistic input parameters. The probabilistic distribution parameters arrived from live data analysis was used to design experiments to define the availability domain of the network under consideration. The availability domain can be used as a reference for planning and implementing maintenance activities. A new metric is proposed which incorporates a consistency index along with key service parameters that can be used to compare the performance of different service providers. The developed tool can be used for reliability analysis of mobile communication systems and assumes greater significance in the wake of mobile portability facility. It is also possible to have a relative measure of the effectiveness of different service providers.

A Comparative Study Of The Organisation And Management Of Notihed Markets In Bangladesh With The Organisation And Management Of Regulated Markets In West Bengal India

For improving agricultural marketing, which has been discussed in the previous chapter, the Government has intervened in different ways. The direct regulatory role through the regulation of markets and market practices is one of the ways in which governmental intervention can improve agricultural marketing. This study is an enquiry of the direct regulatory role of the government through regulation of markets and market practices. By restructuring the operational methods and redesigning the existing physical markets, this system gives direct benefit to the cultivating class and protects them from the market manipulations of organised and powerful private traders. If traders do not continue their trade for the time being they will not be affected financially, because they are resourceful or financially solvent. On the other hand, Cultivators must sell their produce immediately after harvesting for the lack of additional facilities or to satisfy other needs for which finance is required. Another important reason is that Cultivators/farmers are not organised and because of lack of their organisation, they sell their produces individually. In this situation, a farmer is helpless when astute traders indulge in manipulations at the time of purchase of the produces. So it is the government's obligation to protect the interest of the farmers. Protection of the farmer/cultivator is necessary not only from the point of social justice but also from that of economic growth. If the farmers are assured of a remunerative or incentive price for their produce, they will get the inspiration to produce more and through more production, economy will be developed and the nation as a whole will be benefitted. This study will examine the management system of the markets through the direct regulatory role played by the governments to control markets and market practices in West Bengal and Bangladesh.

Community Participation in Ecotourism: An Inclusive Development Option for Kerala

The inferences obtained from the study are presented in coherent area-specific levels so as to understand the ecotourism and its sub-sector areas for the researchers and policy makers about the issues, importances and potentialities of the sector. An analysis of the tourism sector in Kerala has shown tremendous growth both in terms of tourist arrivals and in terms of revenue generation from direct and indirect sources. The foreign tourist visitors in Kerala in 2014 was 9,23,336 which shows 7.60 percent increase from the last year and the domestic tourist visitors were 1,16,95,411 which again shows 7.71 percent increase, is a clear evidence of its potential. In 2014 the industry contributed revenue of 24885.44 crores from direct and indirect sources giving rise to an increase of 12.11 percent from the last year. A dichotomy of tourists and ecotourists shows that tourists in the ecotourism destinations come to 42.6 percent of the total, shows the scope, significance and its potential. Correlation of zone-wise tourist arrivals based on the ecotourism destinations highlights the fact that with only 19 of the 64 destinations that come in the central zone are the most preferred centres (around 54 percent) for the domestic as well as foreign tourists. The north zone encompassing 6 districts with rich biodiversity shows that the tourists‟ arrival patterns exhibit less promising results. Though the north zone has 31 ecotourism destinations of the state receives only 6.19 percent of the foreign visitors. The ecotourism activities in the state are primarily managed by the Eco-Development Committees (EDCs) and the Vana Samrakshana Samithies (VSS) under the Forest Development Agency of Kerala. Social class-wise categorization of membership shows that 13142 families have membership in 190 EDCs with SC (28 percent), ST (33 percent) and other marginalised communities (39 percent). But this in the VSS shows that 400 VSS have 59085 members actively engaged in ecotourism activities and social category of the VSS makes clear that majority are from the other marginalized fringe households with 62 percent where as the participation of SC is 12 percent and ST is 26 percent. An evaluation of the socio-economic and demographic matrix of the community members involved in ecotourism activities brings out region specific differences. About 75.70 percent of the respondents are males and the rest are females. Majority of the respondents (about 60 percent) are in the age group of 20 to 40 years, followed by the age group of 40-50 (20 percent). The average age of respondents in the three zones is between 35 and 37 years. The majority of the respondents are married, a few are unmarried. Average family size is 4-5 members and differences are identified among zones. Average number of adults per household is 3 and child per household is 2. Majority have an education of 10th class and below i.e. about 60 percent of the sample have only basic school education like primary, secondary and high school (i.e. up to SSLC but not passed) level. About 18 percent are SSLC passed, 10 percent are undergraduates whereas 6 percent constitute respondents having qualification of graduation and above. Majority of the „graduates and above‟ are from south and central zone. Inter-zone differences in educational profile are also identified with lesser number of „graduates and above‟ are identified in the north zone compared to the other two zones. Investigating into the income and livelihood options of the respondents gives insight about the prominence of ecotourism as an employment and livelihood option for the community members, as more than 90 percent of the respondents have cited tourism sector as their main employment option. Most (49.30 percent) of respondents get 100 percent income from tourism related activities, followed by 37.30 percent of community members have income between 75-99 percent from tourism whereas the rest (13 percent) have less than 74 percent of their income from tourism and there exists difference between zones and percentage of income. Financial habit shows that about 49.7 percent hold active bank accounts, 61 percent have savings behaviour and 73.8 percent have indebtedness. Analysis about the ownership of house brings to light that 37 percent of respondents live in their own house followed by 25.7 percent in government funded/provided house and 21 percent in their parent‟s house and 3.5 percent in rented house. About 12 percent of the respondents have other kinds of accommodation facilities such as staff quarters, etc. But in the case of north zone majority i.e. 52 percent primarily depend on the government funded house indicating the effectiveness of government housing programme. Standard of living measured in SLI frameworks shows that majority of the respondents have medium SLI values (42.3 percent); the remaining 47.7 percent have low SLI and 10 percent have high SLI. The community members have been benefitted immensely from forest and its resources. Since the ecotourism destinations are located amidst the wildlife settings, majority of them depend on forest for their livelihood. The information on the tourist‟s demographic characteristics like age, sex, educational qualification and annual income show that the age category of domestic and foreign tourists falls below the age group of less than 35 years (about 65 percent), whereas only 16 percent of tourists are aged above 46 years. The age group below 25 years consists of more international tourists (31.3 percent) compared to the proportion of domestic tourists (12.5 percent). Male-female ratio shows that the males constitute 56 percent of the sample and females with 44 percent. The factors determining the impact of ecotourism programmes in the community was evaluated with the aid of a factor analysis with 12 selected statements. The worries and concerns of the community members about the impact of ecotourism on the environment are well understood from this analysis. It can be drawn that environment protection and the role of ecotourism in improving the income and livelihood options of the local communities is the most important factor concerning the community members.

Prediction of the azimuth angle dependence of the quasimolecular anisotropy in heavy ion collisions

Within the quasimolecular (MO) kinematic dipole model we predict a strong dependence of the anisotropy of the MO radiation on the orientation of the heavy ion scattering plane relative to the direction of the photon detection plane.

Evaluaci??n y acci??n tutorial en educaci??n primaria

Se presenta experiencia educativa que propone elaborar el proyecto curricular del centro para adaptarlo a las necesidades reales del contexto. Se realiza en el CEIP Cristo de la Salud en N??var, Granada. Los objetivos son: desarrollar los apartados del proyecto curricular del centro; elaborar los elementos del proyecto curricular de centro; evaluaci??n del proyecto curricular.

Agresividad y deporte

Estudiar la posible relación que existe entre la práctica de una actividad deportiva, como es el kárate infantil, no competitivo, con la agresividad que el niño muestra, no sólo en ese ámbito deportivo específico, sino también en un campo social más amplio. 45 alumnos practicantes de la actividad deportiva extraescolar de kárate de entre 7 y 11 años, y otro grupo de 43 alumnos de las mismas características pero que no realizan actividades deportivas extraescolares. Tras una primera parte, en la que se abordan los planteamientos teóricos sobre la agresividad, el hecho agresivo, las diferencias sexuales, desarrollo evolutivo y psicopatológico de la conducta agresiva, y sobre el deporte, la estructura del grupo deportivo y la relación del deporte con la agresividad, se pasa a la exposición del trabajo de campo. Test escritos como el EPQ-J, un cuestionario de agresividad confeccionado por el autor, y el test proyectivo de las fábulas de Düss (1980). En la mayoría de los casos no coincidían las respuestas que daban los alumnos, ni su comportamiento observable, con aquellas que daban las familias. Además se demostró una ambivalencia con respecto a la mayoría de las respuestas y por falta de tiempo, no se ha podido dar resultados cuantificados. No obstante el autor aporta una impresión general, que afirma que no hay diferencias significativas en los niveles de agresividad del grupo de kárate con respecto al otro grupo. Esta falta de diferencias puede deberse a que la práctica del kárate se realiza tres horas a la semana, constituyendo una influencia mínima. Además deben realizarse pruebas con grupos orientados hacia la competición, no sólo hacia el aprendizaje, para poder encontrar diferencias más significativas.

Colegio Beata Imelda : Dominicas de la Anunciata : 75 aniversario, 1929-2004

Publicado con motivo de la celebraci??n del 75 aniversario del Colegio Beata Imelda de la Felguera este libro recoge la andadura de este centro educativo desde su momento fundacional en enero de 1929 por las Hermanas Dominicas de la Anunciata. La publicaci??n est?? estructurada en tres cap??tulos: 1) Algo de historia: donde la profesora de la Universidad de Oviedo, Carmen Diego P??rez, dibuja el perfil hist??rico de la instituci??n; 2) Testimonios y recuerdos: donde antiguos profesores y alumnos exponen sus vivencias y experencias en el colegio; y 3) Cr??nica de las bodas de diamante: donde se recogen los textos y fotograf??as de los actos conmemorativos.

Las dimensiones factoriales de la comprensión verbal y su influencia en el rendimiento escolar.

Abordar con seriedad el problema de las diferencias de éxito o fracaso escolares para poder llegar a determinar y comprender mejor sus causas, en orden a poderlas controlar, de cara a un pleno rendimiento académico, analizando que relación existe entre el rendimiento escolar de los alumnos y su comprensión verbal. Niños de sexto de EGB, del Colegio Compañía de María, Colegio San Agustín, Colegio San Isidro, todos ellos de Granada. Para establecer las dimensiones fundamentales de la comprensión verbal se aplica a los sujetos una serie de tests verbales específicos, así como la corrección de las pruebas verbales de cada uno de los sujetos de estudio. Para estudiar la influencia de la comprensión verbal en el rendimiento escolar, se aplican a los sujetos experimentales varias pruebas, así como la pasación de distintos cuestionarios a los padres de los alumnos y entrevistas personales con ellos. Test de diferencia de medias de la T de Student, método de factorización de máxima verosimilitud, método de rotación de Varimax, test de matrices progresivas de Raven, inventario de hábitos de estudio de F.Pozar. Análisis factorial, desviaciones típicas, coeficiente de fiabilidad por el método de Kuder-Richardson, coeficiente de correlación de Pearson, coeficiente de fiabilidad por el método Spearman-Brown. Los coeficientes de fiabilidad obtenidos a través de la fórmula de Kuder-Richarson son más bajos que los obtenidos por la fórmula de Spearman-Brown. El criterio del nivel social de las familias puede ser válido para predecir la inteligencia verbal de los sujetos. Utilización del análisis factorial, para explorar las dimensiones principales de la comprensión verbal. La relación entre los factores verbales que integran la comprensión verbal y el rendimiento en Lengua, Matemáticas y el rendimiento total, se ha estudiado a través de un análisis de regresión múltiple según el modelo lineal. Respecto a la comprensión verbal: enorme complejidad del campo verbal, existencia de tres dimensiones de la comprensión verbal: dimensión lingüística, dimensión semántica y dimensión ideativa. Respecto al rendimiento escolar: el factor de comprensión verbal favorece positivamente el rendimiento general académico de los alumnos; las variables controladas en el estudio realizado determinan el rendimiento académico; a la hora de dirigir la orientación escolar de un centro educativo, es de interes tener presente, que una buena metodología de estudio y un buen sistema de trabajo en los alumnos favorece positivamente el éxito de los estudios.

Análisis y medición de la influencia de la participación de padres en el proceso de maduración del niño, en el periodo de Educación Infantil.

Madurez pedagógica de padres y rendimiento académico de los niños a través de la participación de los padres en el colegio, en el programa Andalucía. Centros escolares de Córdoba, Sevilla y Granada en su mayoría. Muestra escogida del programa Andalucía y del programa Educación Preescolar Comunitaria escogida de sujetos al azar. Cada uno de los cuestionarios está compuesto por varias dimensiones y numerosas variables. Se pasan al principio y al final del curso académico. Ocho cuestionarios de paraprofesionales, de padres y de niños. Análisis factorial, coeficiente alfa y matriz multivariable. Alta consistencia interna de: a) cuestionarios de autoevaluación de paraprofesionales, respecto a su labor educativo docente y a su formación integral, b) cuestionarios de padres que registran los valores educativo-formativo de éstos en la formación de sus hijos y su participación en centros escolares. En alumnos los resultados de la factorización se distancian de la estructura original de los cuestionarios y en otros la avalan. Necesidad de actuación conjunta de padres y profesionales en el centro educativo; Creación de un ambiente parecido al hogar requiriendo la apertura a otros profesionales, no solo enseñantes que forman un equipo estable en los centros; Sentido no propedéutico de la Educación Infantil, ni restringido al ámbito cognoscitivo. Debe centrarse en: desarrollo físico y sensorial,intelectual y de la personalidad; Necesidad de estudiar la autonomía personal en etapas posteriores, de niños que han tenido un currículum abierto.