Firm ownership and rent sharing

We analyse - theoretically and empirically - how private versus public ownership of firms affects the degree of rent sharing between firms and their workers. Using a particularly rich linked employer-employee dataset from Portugal, covering a large number of corporate ownership changes across a wide spectrum of economic sectors over more than 20 years, we find a positive relationship between private ownership and rent sharing. Based on our theoretical analysis, this result cannot be explained by private firms being more profit oriented than public ones. However, the result is consistent with privatisation leading to less job security, implying stronger efficiency wage effects.rent sharing; private vs public ownership; panel data

Living bacteria rheology: population growth, aggregation patterns and cooperative behaviour under different shear flows

The activity of growing living bacteria was investigated using real-time and in situ rheology -- in stationary and oscillatory shear. Two different strains of the human pathogen Staphylococcus aureus -- strain COL and its isogenic cell wall autolysis mutant -- were considered in this work. For low bacteria density, strain COL forms small clusters, while the mutant, presenting deficient cell separation, forms irregular larger aggregates. In the early stages of growth, when subjected to a stationary shear, the viscosity of both strains increases with the population of cells. As the bacteria reach the exponential phase of growth, the viscosity of the two strains follow different and rich behaviours, with no counterpart in the optical density or in the population's colony forming units measurements. While the viscosity of strain COL keeps increasing during the exponential phase and returns close to its initial value for the late phase of growth, where the population stabilizes, the viscosity of the mutant strain decreases steeply, still in the exponential phase, remains constant for some time and increases again, reaching a constant plateau at a maximum value for the late phase of growth. These complex viscoelastic behaviours, which were observed to be shear stress dependent, are a consequence of two coupled effects: the cell density continuous increase and its changing interacting properties. The viscous and elastic moduli of strain COL, obtained with oscillatory shear, exhibit power-law behaviours whose exponent are dependent on the bacteria growth stage. The viscous and elastic moduli of the mutant have complex behaviours, emerging from the different relaxation times that are associated with the large molecules of the medium and the self-organized structures of bacteria. These behaviours reflect nevertheless the bacteria growth stage.Comment: 9 pages, 10 figure

Golden tilings

A. Pinto and D. Sullivan [3] proved a one-to-one correspondence between: (i) Cl+ conjugacy classes of expanding circle maps; (ii) solenoid functions and (iii) Pinto-Sullivan's dyadic tilings on the real line. Here, we prove a one-to-one correspondence between: (i) golden tilings; (ii) smooth conjugacy classes of golden diffeomorphism of the circle that are fixed points of renormalization; (iii) smooth conjugacy classes of Anosov difeomorphisms, with an invariant measure absolutely continuous with respect to the Lebesgue measure, that are topologically conjugated to the Anosov automorphism G(x, y) = (x + y, x) and (iv) solenoid functions

Evaluation of the Stiffness Effect of Pipe Supports in Relation to Static and Dynamic Loads in a Flexibility Analysis

Piping flexibility analysis is done to ensure structural integrity in all operating conditions that may occur over the life of a system, whether static or dynamic. In industrial designs generally the rigidity of the support is neglected in the analysis of flexibility. The work presents an evaluation of the loads transmitted the structures in function of the rigidity of the pipe support. The evaluation was done through computer simulation using finite element techniques. The computational simulation made possible the evaluation of the forces transmitted to the support structures of an existing project of an orifice station, when considering the rigidity of the support. The work also shows that it is possible to refine projects when taken into consideration the influence of the rigidity of the supports, making a more adequate sizing the structure, portraying more faithfully the behavior of the system. The work also evaluates the influence, advantages and disadvantages in the use of stiffness in the supports with regard to the load transmitted to the support structures (support, base and tube)

Ladrilhamentos dourados da recta real

Apresentaremos a definição de sucessão dourada {r_i}. Estas sucessões possuem a propriedade de serem Fibonacci quasi-periodicas e determinam um ladrilhamento na recta real. Provaremos uma correspondência bijectiva entre: (i) sucessões douradas; (ii) Classes de conjugação diferenciáveis de difeomorfismos de Anosov na classe de conjugação topológica do automorfismo hiperbólico do toro G(x,y) =(x+y,x); (iii) Classes de conjugação diferenciáveis de difeomorfismos da circunferência com número de rotação igual ao inverso do número de ouro e que são pontos fixos do operador renormalização

An alternative strategy for cloning minor permeases in Aspergillus nidulans

The uapC gene was cloned by complementation of the cryosensitive phenotype of uapA mutants following the instant gene bank method. The analysis of the transformants is presented and a strategy to clone other transport related genes is proposed

Consensus against all odds:explaining the persistence of EU sanctions on Russia

In response to Russia’s actions in Ukraine in 2014, the EU introduced sanctions on Moscow. Despite increasing polarisation among member states after imposition, the sanctions package was consistently renewed. How can sanctions persistence be explained? While scholarly accounts highlight German leadership, commitment to norms, and policymakers’ engagement, the EU’s ability to uphold the sanctions in the face of uneven support among member states remains puzzling. With the help of a two-level game framework, according to which actors make decisions based on the interplay between the domestic and international levels, we argue that the interaction between the Council and domestic politics helped sustaining the consensus. To illustrate this dynamic, in an exploration of domestic factions in Spain and Poland, two member states displaying opposite attitudes towards Russia, we identify the presence of at least one actor whose preference deviates from the core, thereby facilitating consensus

Respuesta agron?mica, productiva y calidad nutricional del pasto colosuana (Bothriochloa pertusa) bajo diferentes fuentes de fertilizaci?n

42 p. Recurso Electr?nicoEl pasto Colosuana (Bothriochloa pertusa), es una gram?nea perenne que se da espont?nea y r?pidamente en las praderas de las zonas tropicales. Para aumentar la productividad del pasto, se realiza la fertilizaci?n del suelo que tiene por objeto restituir los nutrientes extra?dos por las plantas, para incrementar y/o mantener los rendimientos de forraje y aumentar la producci?n animal. Este estudio tuvo como objetivo determinar la producci?n de biomasa, calidad nutricional y evaluaci?n agron?mica del pasto Bothriochloa pertusa bajo la influencia de diferentes fuentes nitrogenadas. Se analizaron dos tipos de suelos franco arenoso y franco arcilloso, y en cada uno de ellos se sometieron a tres tratamientos de fertilizaci?n y un control, con tres repeticiones cada uno: T1 (control), T2 (compost), T3 (triple 15) y T4 (urea). Dentro de los resultados sobresalientes se encontraron diferencias significativas con un p < 0,05 entre los fertilizantes qu?micos (urea y triple 15) frente a los tratamientos control y fertilizante org?nico (compost) para las variables productivas, agron?micas y nutricionales, adicionalmente se evidenci? un mejor comportamiento de la gram?nea en el suelo francoarcilloso. Palabras clave: Fertilizaci?n qu?mica, org?nica, indicadores agron?micos y biomasa.The Colosuana grass (Bothriochloa pertusa), is a perennial grass that occurs spontaneously and quickly in the grasslands of the tropics. To increase the productivity of the grass, fertilization of the soil is carried out, which aims to restore the nutrients extracted by the plants, to increase and / or maintain forage yields and increase animal production. The objective of this study was to determine the production of biomass and evaluate agronomically the colossal grass with applications of different nitrogen sources. Two types of sandy loam and clay loam soils were analyzed, and in each of them three fertilization treatments and one control were applied, with three repetitions each: T1 (Urea), T2 (Triple 15), T3 (Compost) and T4 (Control), likewise, agronomic parameters and biomass production were evaluated. Among the outstanding results, significant differences were found with p <0.05 between chemical fertilizers (urea and triple 15) versus control treatments and organic fertilizer (compost). In addition, differences between soil type were found, finding that the grasses present in the loam-clayey soil presented the highest results. Keywords: Chemical, organic fertilization, agronomic indicators and biomass