Ética, moral e civismo: difícil consenso

As discussões que envolvem o conceito de ética, moral e civismo estiveram e ainda estão presentes no campo educacional, seja através de disciplinas como Educação, Moral e Cívica; Organização Social e Política Brasileira, Estudo dos Problemas Brasileiros; pela via do Ensino Religioso, ou, mais recentemente por meio dos temas transversais. Entre os anos de 1997 e 2006, 13 proposições foram apresentadas por congressistas, procurando reintroduzir nas escolas o estudo da educação moral e civismo, ou introduzir disciplina que contemple a ética e cidadania, em busca do resgate de valores supostamente perdidos pela sociedade. Realizamos uma pesquisa sobre essas proposições, seus autores e suas justificativas. Buscamos problematizar a ambigüidade no discurso e na prática política dos parlamentares e refletir sobre as dificuldades de consenso em torno dos valores pretendidos pelos projetos parlamentares.

Universo moral de jovens internos da Febem

Neste estudo, apresentamos elementos do universo moral de jovens internos da Fundação do Bem-Estar do Menor do Estado de São Paulo. Entrevistamos 14 sujeitos sobre o tema do 'Seguro', uma forma de organização criada pelos próprios jovens internos, que está baseada em regras precisas cuja desobediência implica a exclusão do transgressor. Procuramos verificar as formas de legitimação da referida organização, e os valores morais que a sustentam. As categorias de análise dos dados foram: autonomia/heteronomia, virtudes e personalidade moral. Os dados apontam para o predomínio de formas heteronômicas de legitimação das regras, para a valorização de certos traços de caráter (virtudes) como a 'firmeza', a 'virilidade', a 'coragem' e para a franca desvalorização de seus contrários (fraqueza, homossexualidade, medo). Os dados também apontam para a construção de uma identidade que inclui valores do chamado 'mundo do crime' e que se opõe claramente ao 'mundão', que inclui as pessoas que não são os 'malandros'.

Performance of a new gadolinium-based intravascular contrast agent in free-breathing inversion-recovery 3D coronary MRA.

In three-dimensional (3D) coronary magnetic resonance angiography (MRA), the in-flow contrast between the coronary blood and the surrounding myocardium is attenuated as compared to thin-slab two-dimensional (2D) techniques. The application of a gadolinium (Gd)-based intravascular contrast agent may provide an additional source of signal and contrast by reducing T(1blood) and supporting the visualization of more distal or branching segments of the coronary arterial tree. In six healthy adults, the left coronary artery (LCA) system was imaged pre- and postcontrast with a 0.075-mmol/kg bodyweight dose of the intravascular contrast agent B-22956. For imaging, an optimized free-breathing, navigator-gated and -corrected 3D inversion recovery (IR) sequence was used. For comparison, state-of-the-art baseline 3D coronary MRA with T(2) preparation for non-exogenous contrast enhancement was acquired. The combination of IR 3D coronary MRA, sophisticated navigator technology, and B-22956 allowed for an extensive visualization of the LCA system. Postcontrast, a significant increase in both the signal-to-noise ratio (SNR; 46%, P < 0.05) and contrast-to-noise ratio (CNR; 160%, P < 0.01) was observed, while vessel sharpness of the left anterior descending (LAD) artery and the left coronary circumflex (LCX) were improved by 20% (P < 0.05) and 18% (P < 0.05), respectively.

Elecciones escolares: moral y distinción en la relación familia-escuela

En el contexto de la fragmentación educativa que caracteriza a la Argentina, este trabajo se propone analizar los modos en que se configura la relación familia-escuela en un grupo social de clase media-alta y alta. Las relaciones se analizan en función de las elecciones escolares que realizan familias de dos tradicionales localidades del Gran Buenos Aires sobre una escuela católica. Ese análisis está estructurado sobre el corpus analítico constituido por entrevistas a directivos, docentes, padres y jóvenes exalumnos y por registros de observación participante y documentación institucional.

Constraints on the permeability structure of alluvial aquifers from the poro-elastic inversion of multi-frequency P-wave velocity logs

We have explored the possibility of obtaining first-order permeability estimates for saturated alluvial sediments based on the poro-elastic interpretation of the P-wave velocity dispersion inferred from sonic logs. Modern sonic logging tools designed for environmental and engineering applications allow one for P-wave velocity measurements at multiple emitter frequencies over a bandwidth covering 5 to 10 octaves. Methodological considerations indicate that, for saturated unconsolidated sediments in the silt to sand range and typical emitter frequencies ranging from approximately 1 to 30 kHz, the observable velocity dispersion should be sufficiently pronounced to allow one for reliable first-order estimations of the permeability structure. The corresponding predictions have been tested on and verified for a borehole penetrating a typical surficial alluvial aquifer. In addition to multifrequency sonic logs, a comprehensive suite of nuclear and electrical logs, an S-wave log, a litholog, and a limited number laboratory measurements of the permeability from retrieved core material were also available. This complementary information was found to be essential for parameterizing the poro-elastic inversion procedure and for assessing the uncertainty and internal consistency of corresponding permeability estimates. Our results indicate that the thus obtained permeability estimates are largely consistent with those expected based on the corresponding granulometric characteristics, as well as with the available evidence form laboratory measurements. These findings are also consistent with evidence from ocean acoustics, which indicate that, over a frequency range of several orders-of-magnitude, the classical theory of poro-elasticity is generally capable of explaining the observed P-wave velocity dispersion in medium- to fine-grained seabed sediments

Cultura de género y diversidad en el razonamiento moral

Este texto enfoca las representaciones personales de la moral en la acción centrada en el compromiso de ayudar a una persona amiga que ha quebrantado una norma social. El artículo es un resumen del trabajo de investigación sobre el análisis de las representaciones de una serie de sujetos de ambos sexos sobre la resolución de un dilema moral. Desde una perspectiva genético-constructiva y desde la teoría de los modelos mentales, los autores formulan la teoría de los modelos organizadores para explicar que la actuación de un sujeto en un momento determinado está, en parte, condicionada por la especificidad del problema y, en parte, por el nivel de desarrollo estructural obtenido mediante el ejercicio de sus competencias cognitivas en contenidos de diferente naturaleza. Dentro de este marco teórico, los autores han estudiado las diferencias de los razonamientos según la edad y el sexo de la muestra de sujetos.

Razonamiento moral y educación

El texto se basa en el análisis del razonamiento moral a partir del marco de los modelos organizadores. A partir de la determinación de las diferentes representaciones que una serie de sujetos realizaron sobre un dilema basado en un conflicto moral entre iguales de edad, y que incluyó tres núcleos (justicia, felicidad y cuidado) se detectó que existen cuatro grandes modelos organizadores que se presentan en diferentes líneas evolutivas. La tesis que se defiende es que la inclusión de los sentimientos puede guiar el razonamiento a niveles más elevados y puede integrar las perspectivas de justicia y solidaridad a la hora de resolver conflictos interpersonales. En el artículo se afirma que todo esto son retos en los cuales es necesario trabajar para conseguir un modelo educativo integrador dentro de las escuelas.

Source-wavelet estimation during full-waveform inversion of ground-penetrating radar data

A major issue in the application of waveform inversion methods to crosshole ground-penetrating radar (GPR) data is the accurate estimation of the source wavelet. Here, we explore the viability and robustness of incorporating this step into a recently published time-domain inversion procedure through an iterative deconvolution approach. Our results indicate that, at least in non-dispersive electrical environments, such an approach provides remarkably accurate and robust estimates of the source wavelet even in the presence of strong heterogeneity of both the dielectric permittivity and electrical conductivity. Our results also indicate that the proposed source wavelet estimation approach is relatively insensitive to ambient noise and to the phase characteristics of the starting wavelet. Finally, there appears to be little to no trade-off between the wavelet estimation and the tomographic imaging procedures.

Buenos libros, malas lectoras: la enfermedad moral de las mujeres del siglo XIX

El seu article parteix de l'afirmació que el destí de les dones al segle XIX està marcat, en la ficció, pel "bovarysme", malaltia que proposa que les dones s'emmalalteixen i moren perquè llegeixen malament. El treball analitza aquest problema de la "mala lectura" traçant un recorregut que va des de Fernán Caballero fins a Freud i es comenten alguns episodis de lectura que apareixen en la "Autobiografía" de Gertrudis Gómez de Avellaneda, Clemencia, Amalia, Madame Bovary, María, La regenta i El caso Dora. Her article departs from the statement that the destiny of women in the 19th century is determined, in fiction, by "bovarysm", an illness which proposes that women get sick and die because they read incorrectly. The work analyzes this problem of "bad reading" tracing a journey from Fernán Caballero to Freud, and comments on several episodes about the act of reading, from Gertrudis Gómez de Avellaneda's "Autobiography", Clemencia, Amalia, Madame Bovary, María, La Regenta and Dora's Case.

Free-breathing renal MR angiography with steady-state free-precession (SSFP) and slab-selective spin inversion: initial results.

BACKGROUND: The aim of our study was the investigation of a novel navigator-gated three-dimensional (3D) steady-state free-precession (SSFP) sequence for free-breathing renal magnetic resonance angiography (MRA) without contrast medium, and to examine the advantage of an additional inversion prepulse for improved contrast. METHODS: Eight healthy volunteers (mean age 29 years) and eight patients (mean age 53 years) were investigated on a 1.5 Tesla MR system (ACS-NT, Philips, Best, The Netherlands). Renal MRA was performed using three navigator-gated free-breathing cardiac-triggered 3D SSFP sequences [repetition time (TR) = 4.4 ms, echo time (TE) = 2.2 ms, flip angle 85 degrees, spatial resolution 1.25 x 1.25 x 4.0 mm(3), scanning time approximately 1 minute 30 seconds]. The same sequence was performed without magnetization preparation, with a non-slab selective and a slab-selective inversion prepulse. Signal-to-noise ratio (SNR), contrast-to-noise (CNR) vessel length, and subjective image quality were compared. RESULTS: Three-dimensional SSFP imaging combined with a slab-selective inversion prepulse enabled selective and high contrast visualization of the renal arteries, including the more distal branches. Standard SSFP imaging without magnetization preparation demonstrated overlay by veins and renal parenchyma. A non-slab-selective prepulse abolished vessel visualization. CNR in SSFP with slab-selective inversion was 43.6 versus 10.6 (SSFP without magnetization preparation) and 0.4 (SSFP with non-slab-selective inversion), P < 0.008. CONCLUSION: Navigator-gated free-breathing cardiac-triggered 3D SSFP imaging combined with a slab-selective inversion prepulse is a novel, fast renal MRA technique without the need for contrast media.

Phase-sensitive dual-inversion recovery for accelerated carotid vessel wall imaging.

OBJECTIVES: Dual-inversion recovery (DIR) is widely used for magnetic resonance vessel wall imaging. However, optimal contrast may be difficult to obtain and is subject to RR variability. Furthermore, DIR imaging is time-inefficient and multislice acquisitions may lead to prolonged scanning times. Therefore, an extension of phase-sensitive (PS) DIR is proposed for carotid vessel wall imaging. METHODS: The statistical distribution of the phase signal after DIR is probed to segment carotid lumens and suppress their residual blood signal. The proposed PS-DIR technique was characterized over a broad range of inversion times. Multislice imaging was then implemented by interleaving the acquisition of 3 slices after DIR. Quantitative evaluation was then performed in healthy adult subjects and compared with conventional DIR imaging. RESULTS: Single-slice PS-DIR provided effective blood-signal suppression over a wide range of inversion times, enhancing wall-lumen contrast and vessel wall conspicuity for carotid arteries. Multislice PS-DIR imaging with effective blood-signal suppression is enabled. CONCLUSIONS: A variant of the PS-DIR method has successfully been implemented and tested for carotid vessel wall imaging. This technique removes timing constraints related to inversion recovery, enhances wall-lumen contrast, and enables a 3-fold increase in volumetric coverage at no extra cost in scanning time.