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The work has social functions that involve emotional, cognitive, behavioral and affective aspects of the person, which affect the development and maintenance of interpersonal relationships, are replicated in the fidelity of the employee who stays in the company, does not go to the competition and develop a sense of belonging, enhancing economic income. The market influences the organizations to change the worker-company relationships, emerging as a source of solution the functioning of Psychological Contracts. For the company, its main capital is the human team, which transforms the means of production into goods and services with economic content. Its evolution implies meeting business expectations and reciprocal exchange obligations. The psychological contract helps the psychological well-being of the worker, gives identity and order. Their results are evidenced in the behavior of organizational citizenship, they exchange effort and loyalty for economic rewards, security, respectful treatment, and rewarding interpersonal relationships to achieve their individual expectations. It is an unwritten contract between the employee and the employer, there are four types, the first a transactional contract, the balanced contract, the transitory contract and the relational contract. [ABSTRACT FROM AUTHOR]

This contribution presents estimates of nutrient fluxes and net metabolism in a pristine coastal lagoon of the Gulf of California. During spring, water variables were sampled in the lagoon and the adjacent sea. The biogeochemical model proposed by the LOICZ program (Land-Ocean Interactions in the Coastal Zone) estimated the nutrient fluxes and the net metabolism of the ecosystem. The water renewal rate was 3 days. The El Soldado lagoon functioned as a source of nitrogen (+61 mol day-1) and as a phosphorus basin (-42 mol day-1). The net metabolism was autotrophic (73 mmol C m² month-1) and dominated nitrogen fixation. These observations in the El Soldado lagoon, help to understand the biogeochemical processes and show the importance of their monitoring throughout the annual cycle, as well as in long term periods. [ABSTRACT FROM AUTHOR]

This paper presents a review of the discrete wave number method (DWN), and its application in layered media subjected to a lineal source in the case of Sh waves. The method allows for the numerical calculation of the Green function; it decomposes the displacement field as a superposition of plane waves. The solution is expressed as an integral equation over the horizontal wavenumber domain. The evaluation of the integral equation implies infinite sources distributed along the horizontal x-axis at equal intervals. The method is used to calculate the green function in a layered media; the enforcement of boundary conditions at the interface of each layer allows us to find the appropriate coefficients for the plane wave expansion. Finally, seismographs are calculated for a linear array of surface receivers. [ABSTRACT FROM AUTHOR]

We study the electronic transport through the (001) Al surface coupled to a quantum dot (QD). The local density of states of (001) Al surface was obtained by plane wave self-consistent field method (PWscf) using a five layers slab geometric. The QD and surface interaction is taking in to account by the local Green function (GF), considering quantum hybridization between them. The electronic interaction is modeled by the Anderson impurity (AIM) within the X-boson treatment, describing the localized state in this model as linked with the QD, and considering a huge electronic repulsion inside the QD. We compute the linear conductance in the Kondo, intermediate valence and empty QD regimes, obtaining evidence of a Fano anti-resonance. Our results are similar to the obtained for a quantum wire with a side coupled QD, and theoretical reports for another metallic surfaces with Kondo adsorbates states. [ABSTRACT FROM AUTHOR]

Luttinger liquids are paramagnetic one-dimensional metals. The elementary excitations are collective charge and spin modes. The bosonization technique shows that all physical properties depend on three parameters: the renormalized coupling constant K and the charge and spin velocities. The theoretical correlation functions have behavior power law, the exponents depend on the interaction. We calculated Green's function and obtained the local density of states and momentum distribution. [ABSTRACT FROM AUTHOR]

Using the SGFM (Surface Green's Function Matching) method and the tight-binding approximation we have studied the electronic states of(112) metallic surface of CuInSe2. In this work, we include tetragonal and anion distortions. Because the parameters of the bi-dimensional unitary cell and the distance between atomic planes change when we include these distortions, in consequence, the surface electronic states change too. We study the influence of the distortion on both the dispersion diagrams and Local Density of States (LDOS). Surface states were found in both cases and the effect of the distortions is strong. Such states are localized into the energy gap of the material. We have not considered reconstructions or relaxation of the surface. The inclusion of distortion in the study of the electronic states in the surface is made for the first time, as we know at present. [ABSTRACT FROM AUTHOR]