A apicultura no desenvolvimento agroecológico da reforma agrária no Rio Grande do Sul.

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SME Performance: A Case for Internal Consistency

We develop the theoretical arguments for a contingent path relationship among variables representing the environment, capabilities, strategic orientation, and firm performance. The premise underpinning our study is that internal consistency or fit among contingent relationships yields higher performance levels. Structural equation modeling allows for the statistical examination of multiple relationships simultaneously to test our hypotheses. We find support for the notion that internally consistent paths lead to higher levels of performance for a sample of 181 mid-western small and medium-sized manufacturing firms. A discussion of the implications for these findings with respect to managerial practice and future research is provided

Critical and tricritical exponents of the Gross-Neveu model in the large-NfN_f limit

The critical and the tricritical exponents of the Gross-Neveu model are calculated in the large-$N_f$ limit. Our results indicate that these exponents are given by the mean-field values.Comment: 8 pages, 8 figure

Magnetism in Closed-shell Quantum Dots: Emergence of Magnetic Bipolarons

Similar to atoms and nuclei, semiconductor quantum dots exhibit formation of shells. Predictions of magnetic behavior of the dots are often based on the shell occupancies. Thus, closed-shell quantum dots are assumed to be inherently nonmagnetic. Here, we propose a possibility of magnetism in such dots doped with magnetic impurities. On the example of the system of two interacting fermions, the simplest embodiment of the closed-shell structure, we demonstrate the emergence of a novel broken-symmetry ground state that is neither spin-singlet nor spin-triplet. We propose experimental tests of our predictions and the magnetic-dot structures to perform them.Comment: 4 pages, 4 figures; http://link.aps.org/doi/10.1103/PhysRevLett.106.177201; minor change

Patient brochure on contact lens options

Patients interested in contact lenses, especially new wearers, find the contact lens industry to be overwhelming and confusing. Many practices are asked, How much are your contact lenses? This leads to a lengthy explanation that often goes misunderstood. This patient brochure was designed to answer the many questions prospective contact lens wearers have in hopes of avoiding patient frustration, and to save optometrists and optometric assistants time in repetitively answering such questions

The interplay of strategic orientations and their influence on SME performance

This paper examines the role that learning orientation plays with respect to entrepreneurial orientation, market orientation, and, ultimately, the performance of small and medium-sized enterprises SMEs. Previous research indicated mixed findings in regards to the relationship of these strategic orientations and firm performance. Instead of just direct influences to performance, we examine if learning orientation is an antecedent to market and entrepreneurial orientation. We suggest that in this way, their influence to SME performance would be more accurately predicted. We argue that learning orientation reflects the overall values of the organization, whereas entrepreneurial and market orientations are more action-oriented firm behaviors. Learning orientation would likely set the stage for the requisite actions implied in market and entrepreneurial orientation. Direct effect and mediated effects hypotheses between these strategic orientations are tested on a sample of SME manufacturing firms and their performance. Findings indicate that learning and entrepreneurial orientation directly influence SME performance. However, when learning orientation and its effects are mediated by market and entrepreneurial orientation, direct effects disappear when testing this model. The study offers insight into relationships between various strategic orientations, as to how and when they might influence SME performance

Technical Note: New methodology for measuring viscosities in small volumes characteristic of environmental chamber particle samples

Herein, a method for the determination of viscosities of small sample volumes is introduced, with important implications for the viscosity determination of particle samples from environmental chambers (used to simulate atmospheric conditions). The amount of sample needed is < 1 μl, and the technique is capable of determining viscosities (η) ranging between 10<sup>−3</sup> and 10<sup>3</sup> Pascal seconds (Pa s) in samples that cover a range of chemical properties and with real-time relative humidity and temperature control; hence, the technique should be well-suited for determining the viscosities, under atmospherically relevant conditions, of particles collected from environmental chambers. In this technique, supermicron particles are first deposited on an inert hydrophobic substrate. Then, insoluble beads (~1 μm in diameter) are embedded in the particles. Next, a flow of gas is introduced over the particles, which generates a shear stress on the particle surfaces. The sample responds to this shear stress by generating internal circulations, which are quantified with an optical microscope by monitoring the movement of the beads. The rate of internal circulation is shown to be a function of particle viscosity but independent of the particle material for a wide range of organic and organic-water samples. A calibration curve is constructed from the experimental data that relates the rate of internal circulation to particle viscosity, and this calibration curve is successfully used to predict viscosities in multicomponent organic mixtures

Comments on Sweeny and Gliozzi dynamics for simulations of Potts models in the Fortuin-Kasteleyn representation

We compare the correlation times of the Sweeny and Gliozzi dynamics for two-dimensional Ising and three-state Potts models, and the three-dimensional Ising model for the simulations in the percolation prepresentation. The results are also compared with Swendsen-Wang and Wolff cluster dynamics. It is found that Sweeny and Gliozzi dynamics have essentially the same dynamical critical behavior. Contrary to Gliozzi's claim (cond-mat/0201285), the Gliozzi dynamics has critical slowing down comparable to that of other cluster methods. For the two-dimensional Ising model, both Sweeny and Gliozzi dynamics give good fits to logarithmic size dependences; for two-dimensional three-state Potts model, their dynamical critical exponent z is 0.49(1); the three-dimensional Ising model has z = 0.37(2).Comment: RevTeX, 4 pages, 5 figure