Volume 15 – Issue 3

In this note, we have obtained some novel results on trilateral generating functions for the biorthogonal polynomials suggested by the classical Jacobi polynomials, Jn(α,β,k;x) with Tchebycheff polynomials by group theoretic method. As special cases, we have obtained the corresponding results on Jacobi polynomials

In this paper we give an alternative proof of a two sided estimate of e^x -(1+x⁄t)^ t , stated in [1, Theorem 1]. With this proof, the conditions of this theorem are improved, as demonstrated by a different way in [3].

Various families of generating functions have been established by a number of authors in many different ways. In this paper, we aim at establishing (presumably new) a generating function for the extended second Appellhypergeometric function F_2 (a,b,b’;c,c’;x,y,p,µ) . Relevant connections of certain special cases of the main result presented here with some known result are also pointed out.

Due to continuous changing environment, individuals and organizations increasingly want to develop and build resources in order to achieve competitive advantage. To cope with these changes, the organization is trying to achieve new skills, competencies, and individuals and organizational knowledge, which can influence performance achievement. In this article we show that continuous development helps employees and organizations to reach their goals and achieve performance. Also, we demonstrate that applying a model of simulation organization could perceive a not too distant future, could compute performance, perceive risks and may determine the role of human capital in obtaining competitive advantage. Using simulation (a regression function) and a computer program (MATLAB) organizations can improve its processes, not necessarily by increasing the number of employees, but through their development (seen not as an expense but as an investment on long term).

The results of a comparative study of chromium (initial concentration 9.4 mg/L) removal from wastewater by activated carbon AG-5 and Spirulina platensis biomass are reported. The process of chromium adsorption was studied at a carbon dosage of 0.2 g over a 24 hr period. The results obtained by NAA and AAS showed that only 4% of chromium was adsorbed from wastewater. The NAA data pointed to an increase of Fe, Ni and Cu content in activated carbon after wastewater treatment, which is indicative of competitive adsorption. For Spirulina platensis (time of experiment 1 hr), a rapid rate of chromium adsorption within the first 15 min of the reaction was observed. ASS data showed that during an hour, approximately 90% of chromium was removed from wastewater. Furthermore, a high amount of iron, nickel and copper were removed from the chromium containing industrial effluents by the spirulina biomass. Fourier transform infrared spectroscopy was used to identify functional groups responsible for metal binding. Surface morphology of activated carbon and cyanobacterial biomass was analyzed by scanning electron microscopy.

The impact of accelerated particles as well as of UV photons generated in low temperature plasma discharge on pathogen bacterial germs was studied. An experimental setup of a dielectric barrier discharge in atmospheric air was used to treat agarized cultures of Gram-negative and Gram-positive bacteria for two distances between the high voltage electrode and the grounded one. The diameters of the growth inhibition areas were higher for the shortest distance between the electrodes – 2.5 cm for all tested germs which can be attributed to the synergistic action of accelerated electrons, ions, and reactive oxygen species, as well as UV photons. For higher distance between the electrodes – 3.5 cm, only the Gramnegative bacteria were still killed, fact that can be related to the higher UV-generated ozone level. The more efficient action of ozone on the proteins present in the cellular wall of Gramnegative bacteria is supposed to explain this behavioral trend different from Gram-positive bacteria response.

Structural hardening of PbSbAl alloys is characterized by two stages: the first is characterized by a hardening continuous reaction and a softening discontinuous transformation. The second is characterized by a softening discontinuous precipitation. The influence of minor additions of aluminum results in increasing of hardness. Two structural states were considered: as-cast and rehomogenized alloys. The contents of Aluminium (Al) are 0.16%, 0.8% and 1.4% (in weight percent). Those of antimony (Sb) are 1.5% and 2%. The explored temperatures are essentially 20°C and 80°C. This last is chosen because it corresponds to the temperature of ripening of battery plates as well as the extreme temperature of its operation.

The study of the influence of heat treatment on changes of mechanical and structural properties of Hastelloy G-35 is a highly interdisciplinary topic at the interface of the physical chemistry of metallic materials, which also helps in environmental and economic protection. The structural and microstructural studies for the different transformation temperature led to identify formed phases, the morphology and the kinetics of transformation. The diversity of microstructures provides a wide field of investigation in the study of relationships between microstructure and mechanical properties. This work has been carried out using different techniques: hardness, optical microscope and X-ray diffraction. The study shows an improvement in hardness of different pieces treated at different temperatures as well as various structural changes that characterize the aging and overaging of these alloys. After the heat treatment, the crystal structure of the alloy G35 changes from a facecentered cubic structure to the orthorhombic

A very important part in the analytical chain of data content is the one of vocal sound signal recording and processing, both from phonetic and enviromental acoustic transmission points of view. Regarding the speaking act, no matter is the form of the discourse, speaking or conversation deed, all these shapes of communication are revealed in coherent sequences which are composed by lexical units that generate semantic structures exclusively through a proper phonetical support. This study aims to underline the way in which some parametric vocal clusters repartition, that reveal an obvious association level, is mirrored in informational weighted entropy distribution.

In this article we have tried to perform a comprehensive review of construction of time operator. We know time enters the Schrodinger equation as an external parameter and not a dynamical variable. It is not a standard quantum mechanical observable. This survey explores various attempts made in order to treat time as a dynamical variable (observable) and hence measre it