1,772 research outputs found

    The best constant for the centered maximal operator on radial decreasing functions

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    We show that the lowest constant appearing in the weak type (1,1) inequality satisfied by the centered Hardy-Littlewood maximal operator on radial integrable functions is 1.Comment: corrected typo

    Viability study of sailing propulsion combined with a conventional system

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    For many years now, sails have been used as a propulsion system. At present, they are restricted to recreational/sport crafts since the appearance of the first steam vessels in the beginning of the 19 th century. But in the last years, due to the increase of fuel price and the pollution of the environment, it is being studied the possibility to introduce again the sail as a propulsive method combined with other conventional systems. In this paper, it is studied the viability of using a sail as a propellant with other conventional systems of propulsion. After considering the concept of apparent wind, the range of use of this complementary propulsion is presented. The calculation methodology, the numerical simulations and the wind inputs from a specific route are also included

    Lower bounds for the centered Hardy-Littlewood maximal operator on the real line

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    Let 1010 such that for each fLp(R)f\in L^p(\mathbb{R}), the centered Hardy-Littlewood maximal operator MM on R\mathbb{R} satisfies the lower bound MfLp(R)(1+εp)fLp(R)\|Mf\|_{L^p(\mathbb{R})}\ge (1+\varepsilon_p)\|f\|_{L^p(\mathbb{R})}.Comment: accepted manuscrip

    Reduced kinetic mechanisms for modelling LPP combustión in gas turbines

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    Reduced kinetic mechanisms for modelling LPP combustión in gas turbine

    Application of blended learning in accounting. Experience in different degrees in higher education

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    La incorporación de las nuevas tecnologías de la información y la comunicación en la enseñanza está dando lugar al desarrollo de nuevas metodologías docentes, como es el aprendizaje combinado. En este trabajo se muestran los resultados de una experiencia de aprendizaje combinado realizada en la asignatura de Contabilidad General que se imparte en el primer año en cuatro titulaciones de la Universidad de Granada (Doble titulación en Administración de Empresas y Derecho, Licenciatura en Administración de Empresas, Licenciatura en Economía y Diplomatura en Ciencias Empresariales) con 1.431 alumnos matriculados en el curso académico 2009-2010. El trabajo se centra en el análisis de las medidas objetivas y subjetivas de los resultados obtenidos por los alumnos, considerando cada titulación de forma independiente. Como medida objetiva se considera la nota final obtenida por los alumnos que han participado en esta experiencia de aprendizaje combinado. Como medida de carácter subjetivo se utiliza la percepción que tienen los alumnos sobre la utilidad, motivación y satisfacción de la experiencia de aprendizaje combinado llevada a cabo en las distintas titulaciones. Para recopilar los datos de carácter subjetivo se realizó un cuestionario, obteniéndose 985 respuestas válidas. Los resultados del trabajo muestran que el empleo del aprendizaje combinado tiene en todas las titulaciones un efecto positivo en la reducción de la tasa de abandono de la asignatura y en la mejora de la tasa de aprobados. Además, en todas las titulaciones, los estudiantes se encuentran satisfechos con el aprendizaje combinado, lo consideran útil y motivador y las percepciones de los estudiantes están relacionadas entre sí. Hay diferencias, según la titulación, en las variables que inciden en las calificaciones de los alumnos. No obstante, en general, están positivamente relacionadas con la nota de entrada a la universidad y del nivel de asistencia a clase.The incorporation of new technologies of information and communication in education is stimulating new teaching methodologies such as blended learning. This paper shows the results of a blended learning experience in the General Accounting subject offered by the University of Granada, for the first year undergraduate courses (in Business Administration and Management, in Economics, in Business Studies and in the double course, Business Administration/Law) with 1431 students in the academic year 2009-2010. This research uses objective and subjective measures of performance of students. We have considered the final mark as an objective measure. As a subjective measure we use the students' perception of the usefulness, motivation and satisfaction from the experience of blended learning carried out in the different degrees. We designed a questionnaire to collect subjective data and we obtained 985 valid responses. The results showed that the use of blended learning has a positive effect in reducing the dropout rate of the subject and in improving the exam marks. In addition, students are satisfied with blended learning, find it useful and motivating and perceptions of the students are related between them. There are differences, depending on the degree, in the variables that affect students’ final marks in each degree. However, in general, final marks depend on background and class attendance rate
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