Comments on the Quantum Potential Approach to a Class of Quantum Cosmological Models

In this comment we bring attention to the fact that when we apply the ontological interpretation of quantum mechanics, we must be sure to use it in the coordinate representation. This is particularly important when canonical tranformations that mix momenta and coordinates are present. This implies that some of the results obtained by A. B\l aut and J. Kowalski-Glikman are incorrect.Comment: 7 pages, LaTe

Desenvolvimento inicial e trocas gasosas do meloeiro sob temperatura elevada.

O objetivo desse trabalho foi avaliar o crescimento inicial e as trocas gasosas de meloeiros crescidos sob dois diferentes regimes de temperatura

Gaussian superpositions in scalar-tensor quantum cosmological models

A free scalar field minimally coupled to gravity model is quantized and the Wheeler-DeWitt equation in minisuperspace is solved analytically, exhibiting positive and negative frequency modes. The analysis is performed for positive, negative and zero values of the curvature of the spatial section. Gaussian superpositions of the modes are constructed, and the quantum bohmian trajectories are determined in the framework of the Bohm-de Broglie interpretation of quantum cosmology. Oscillating universes appear in all cases, but with a characteristic scale of the order of the Planck scale. Bouncing regular solutions emerge for the flat curvature case. They contract classically from infinity until a minimum size, where quantum effects become important acting as repulsive forces avoiding the singularity and creating an inflationary phase, expanding afterwards to an infinite size, approaching the classical expansion as long as the scale factor increases. These are non-singular solutions which are viable models to describe the early Universe.Comment: 14 pages, LaTeX, 3 Postscript figures, uses graficx.st

Formula to evaluate efficacy of vaccines and systemic substances against three-host ticks.

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Comments on "There is no axiomatic system for the quantum theory"

In a recent paper, Nagata [1] claims to derive inconsistencies from quantum mechanics. In this paper, we show that the inconsistencies do not come from quantum mechanics, but from extra assumptions about the reality of observables

The GREATS Hβ\beta+[OIII] Luminosity Function and Galaxy Properties at z∼8\mathbf{z\sim8}: Walking the Way of JWST

The James Webb Space Telescope will allow to spectroscopically study an unprecedented number of galaxies deep into the reionization era, notably by detecting [OIII] and H$\beta$ nebular emission lines. To efficiently prepare such observations, we photometrically select a large sample of galaxies at $z\sim8$ and study their rest-frame optical emission lines. Combining data from the GOODS Re-ionization Era wide-Area Treasury from Spitzer (GREATS) survey and from HST, we perform spectral energy distribution (SED) fitting, using synthetic SEDs from a large grid of photoionization models. The deep Spitzer/IRAC data combined with our models exploring a large parameter space enables to constrain the [OIII]+H$\beta$ fluxes and equivalent widths for our sample, as well as the average physical properties of $z\sim8$ galaxies, such as the ionizing photon production efficiency with $\log(\xi_\mathrm{ion}/\mathrm{erg}^{-1}\hspace{1mm}\mathrm{Hz})\geq25.77$. We find a relatively tight correlation between the [OIII]+H$\beta$ and UV luminosity, which we use to derive for the first time the [OIII]+H$\beta$ luminosity function (LF) at $z\sim8$. The $z\sim8$ [OIII]+H$\beta$ LF is higher at all luminosities compared to lower redshift, as opposed to the UV LF, due to an increase of the [OIII]+H$\beta$ luminosity at a given UV luminosity from $z\sim3$ to $z\sim8$. Finally, using the [OIII]+H$\beta$ LF, we make predictions for JWST/NIRSpec number counts of $z\sim8$ galaxies. We find that the current wide-area extragalactic legacy fields are too shallow to use JWST at maximal efficiency for $z\sim8$ spectroscopy even at 1hr depth and JWST pre-imaging to $\gtrsim30$ mag will be required.Comment: 13 pages, 9 figures, accepted for publication in MNRA

Ocorrência de pragas e inimigos naturais em arroz irrigado em Igreja Nova - Alagoas.

Considerando a importância do cultivo de arroz irrigado na região e a necessidade de conhecer os artrópodes associados a essa cultura em Alagoas, objetivou-se com esse trabalho identificar as pragas e inimigos naturais inerentes a essa cultura no município de Igreja Nova, AL

Efeito do ferro Dextran sobre parâmetros sanguineos, níveis de ferro séricos e hepáticos e desempenho de cabritos de aptidão leiteira.

Resumo: Experimento realizado com os objetivos de avaliar os efeitos do ferro dextran (FD) sobre os parâmetros sanguineos, niveis de ferro serico e hepático, e desempenho de cabritos de aptidao leiteira. O delineamento utilizado foi o inteiramente casualizado, com quatro tratamentos: T1 - sem aplicação de FD; T2 - aplicacao de FD aos 2 dias de idade; T3 - aplicações de Fd aos 2 e 16 dias e T4 - aplicacoes de FD aos 2, 14 e 30 dias. Nao houve diferencas estatisticas entre tratamentos. Os teores de ferro sericos e hepaticos, ao final do experimento, foram: T1 - 172,09 mg/100ml e 146,25 ppm; T2 - 198,06 mg/100ml e 147,83 ppm; T3 - 186,46 mg/100ml e 253,00 ppm e T4 - 173,12 mg/100ml e 295,75 ppm. Para o desenvolvimento ponderal, os resultados firnais foram: T1 - 9,15 kg;T2 - 9,60 kg; T3 - 9,74 kg e T4 - 10,13 kg. [Effect of iron-dextran on the blood values, level in the liver and performance of the kids milk aptitude]. Abatract: Research was developed to evaluate the effect of iron-dextran (ID) on the blood values (hematocrit and hemoglobin), level serum iron and iron in the liver, and performance of the kids milk aptitude. The experiment was complety randomized with four treatments: Tl - no applications ofthe ID; T2 - applications of the ill at 2 days; T3 - applications of the ID at 2 and 16 days and T4 - applications of the ill at 2, 16 and 30 days. No significant difference was found among for all variables studied. The values for iron serum and livers, at the end of the experiment, were: Tl - 172,09 mg/lOOml e 146,25 ppm; T2 - 198,06 mg/lOOml e 147,83 ppm; T3 - 186,46 mg/lOOml e 253,00 ppm e T4 - 173,12 mg/lOOml e 295,75 ppm. Body weight gain the results final, were: Tl - 9,15 kg; T2 - 9,60 kg; T3 - 9,74 kg e T4 - 10,13 kg