1,892 research outputs found
Electrochemical Biosensor-based Devices For Continuous Phenols Monitoring In Environmental Matrices
No full textA flow system method for continuous determination of phenolic compounds in environmental matrices was employed using a dialysis membrane sampler and laccase- and tyrosinase-based biosensors as detector. The biosensors response to different phenolic compounds was investigated. The laccase-based biosensor showed high sensitivity to guaiacol and chloroguaiacol, while the tyrosinase-based biosensor was more sensitive to phenol and chlorophenol. Both of the biosensors presented highly selective measurements of micromolar concentration of these compounds. Detection limits around 1.1 x 10-7 mol L-1 for guaiacol and 1.9 x 10-7 mol L-1 for chloroguaiacol could be estimated for the laccase-based biosensor. Using the tyrosinase-based biosensor detection limits of 1.5 x 10-7 mol L-1 for phenol and 9.0 x 10-8 mol L-1 for chlorophenol were observed. The proposed flow method presented a linear response range between 1.0 μmol L-1 and 100.0 μmol L-1, in the optimized operational conditions (laccase-based biosensor: pH 5.0 and 0 mV vs Ag/AgCl as working potential; tyrosinase-based biosensor: pH 5.5 and 50 mV vs Ag/AgCl as working potential). Real paper mill effluent sample was analyzed by this system and by the reference colorimetric method and the results were discussed.134456462Ortega, F., Domínguez, E., Burestedt, E., Emneus, J., Gorton, L., Marko-Varga, G., (1994) J. Chromatogr., A, 675, p. 65Rogers, K.M., Becker, J.Y., Cembrana, J., Chough, S.H., (2001) Talanta, 54, p. 1059Russell, I.M., Burton, S.G., (1999) Anal. Chim. Acta, 389, p. 161Rossato, S.S., Freire, R.S., Durán, N., Kubota, L.T., (2001) Quim. Nova, 24, p. 77Canofeni, S., DiSario, S., Mela, J., Pilloton, R., (1994) Anal. Lett., 27, p. 1659Nistor, C., Emneus, J., Gorton, L., Ciucu, A., (1999) Anal. Chim. Acta, 387, p. 309Gundersen, J.L., Macintyre, W.G., Hall, R.C., (1997) Environ. Sci. Technol., 31, p. 188Wang, J., (1997) Trends Anal. Chem., 16, p. 84Wang, J., Lu, J., Ly, S.Y., Tian, B., Adeniyi, W.K., Armendariz, R.A., (2000) Anal. Chem., 72, p. 2659Wang, J., Chen, Q., (1995) Anal. Chim. Acta, 312, p. 39Cosnier, S., Fombon, J.J., Labbe, P., Limosin, D., (1999) Sens. Actuators, B, 59, p. 134Yaropolov, A.I., Kharybin, A.N., Emnéus, J., Marko-Varga, G., Gorton, L., (1995) Anal. Chim. Acta, 308, p. 137Freire, R.S., Durán, N., Kubota, L.T., (2001) Talanta, 54, p. 681Freire, R.S., Thongngamdee, S., Durán, N., Wang, J., Kubota, L.T., (2001) Analyst, 127, p. 258(1989) Standard Methods for Examination of Water and Waste-water, 17th ed., , Amer. Publ. Health Ass. N0 5550 New YorkFreire, R.S., Kubota, L.T., Durán, N., (2001) Environ. Technol., 22, p. 897Burestedt, E., Narvaez, A., Ruzgas, T., Gorton, L., Emneus, J., Dominguez, E., Marko-Varga, G., (1996) Anal. Chem., 68, p. 1605Rogers, K.R., Becker, J.Y., Cembrano, J., (2000) Electrochim. Acta, 45, p. 4373Marko-Varga, G., Emneus, J., Gorton, L., Ruzgas, T., (1995) Trends Anal. Chem., 14, p. 319Freire, R.S., Duran, N., Kubota, L.T., (2002) Anal. Chim. Acta, , in pres
R.S. Peters' Comprehensive Theory of Moral Education
No full textThis article presents R.S. Peters’ theory of moral education embedded in his broad conception of morality. The author examines Peters’ views against the background of Kohlberg’s stage theory of moral development; hence, the positions of both thinkers are interwoven throughout the discussion. It addresses some central issues relevant to moral education such as, for example: cognitive and affective aspects of morality, and the acquisition of virtues. In the article the author argues that Peters’ account of moral development and moral education provides supplementation for the somewhat narrow theory developed by Kohlberg, thus establishing a broader framework relevant to moral education.status: Publishe
Combining Fault Analysis Technologies for ISO26262 Functional Safety Verification
No full textThe development of Integrated Circuits for the Automotive sector imposes on complex challenges. ISO26262 Functional Safety requirements entail extensive Fault Injection campaigns and complex analysis for the evaluation of deployed Software Tools. This paper proposes a methodology to improve Fault Analysis Tools Confidence Level (TCL) by detecting errors in the classification of faults. By combining the strengths of Automatic Test Pattern Generators (ATPG), Formal Methods and Fault Injection Simulators we are able to automatically generate a Test Environment that enables the validation of the tools and provides supplementary information about the design behavior. Our results showed fault detection rates above 99% including information to improve ISO26262 metrics calculationAccepted author manuscriptComputer EngineeringQuantum & Computer Engineerin
Participação popular em um conselho gestor de saúde
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Enfermagem, Florianópolis, 2014.Este estudo teve como objetivo analisar as práticas promotoras da Participação Popular em um Conselho Local de Saúde de um município de Santa Catarina. Utilizaram-se como sustentação os princípios teóricos da Promoção da Saúde e participação popular aliados as concepções de Paulo Freire. Método: Trata-se de uma pesquisa com abordagem qualitativa articulada com Itinerário de Pesquisa de Paulo Freire, que consiste de três momentos dialéticos: investigação temática; codificação e descodificação; desvelamento crítico. A trajetória do estudo se desenvolve no interior do Círculo de Cultura a partir do Método Paulo Freire no qual busca compreender através da participação popular as práticas de um Conselho Local de Saúde. A pesquisa foi realizada em um Conselho Local de Saúde de um município de Santa Catarina, entre os meses de junho e setembro de 2013. Constituíram-se cinco Círculos de Cultura com aproximadamente uma hora e trinta minutos de duração, com média de onze participantes. Os participantes foram representantes da população e profissionais da saúde que compõe o referido Conselho Local de Saúde. Esta pesquisa foi aprovada pelo Comitê de Ética em Pesquisa da Universidade Federal de Santa Catarina CEP/UFSC sob o parecer n° 393.516. A investigação temática revelou oito temas. Dentre estes, três foram desvelados em 02 temáticas significativas: Participação popular em um Conselho Local de Saúde e Dificuldades e Facilidades da participação popular em um Conselho Local de Saúde. Os resultados indicaram que a participação popular constitui-se em uma prática de extrema relevância, que carece de maior compreensão por parte dos representantes. A área de abrangência do Conselho Local de Saúde é um espaço ainda incipiente para o desenvolvimento de ações de Promoção da Saúde. Como possibilidades e limitações destacam-se a necessidade de capacitações multiprofissionais através de ações de educação continuada, com o intuito de esclarecer e fortalecer questões conceituais e estratégias de participação popular e promoção da saúde
Transition and wavy walls: an experimental study: An experimental study
No full textA wide body of research exists which explores the effects of surface roughness or patterned wall shapes on instability growth and transition. Building on those works as well as recent experiments demonstrating passive laminar flow control using arrays of discrete roughness [3, 8], a set of spanwise-wavy walls is designed with the goal of suppressing instability growth in two-dimensional boundary layers. In a numerical investigation of Tollmien-Schlichting (TS) wave growth in the presence of streamwise boundary-layer streaks, Cossu and Brandt [1] found that stabilization of TS waves results from spanwise shear in the mean flow, which forms a negative contribution to production in the perturbation kinetic energy equation. Whereas previous efforts have employed streamwise vorticity developing in roughness wakes to provide the requisite mean-flow deformation, in this work stabilization is achieved through modulation of the no-slip surface. Miniature vortex generators (MVGs) have proven an effective means of producing streamwise streaks for transition delay [8], though relatively large streak amplitudes are necessary to counter their eventual decay through viscous dissipation. The notion motivating this work is that spanwise-wavy walls extended in the streamwise direction can produce a similar effect while avoiding bypass transition resulting from large-amplitude streamwise streaks. Toward that end, six wavy walls are used in a modular test model. When TS waves are excited upstream of the wavy walls, substantial delays in the onset of transition are observed for certain spanwise wavelengths compared with the flat-plate reference case
Milczące życie liter. O związku języka i przyrody w poezji R.S. Thomasa
No full textJoanna SoćkoSilent Life of Letters. On Interconnections between Language and Nature in the Poetry of R.S. Thomas.The essay sets out to explore R.S. Thomas’ (1913–2000) vision of the problematic relations between the man, the nature and their Creator. In the context of contemporary critique as well as the 20th century, post-husserlian philosophy, the author analyses Thomas’ cosmological poems and represents, on the one hand, the place that both man and God take in the creation and, on the other, the sacramental relationship between the human and the nature. What is important from this perspective is the material existence of both man and nature, which enables mutual infiltration that leads to discovery of imperceptible dimension of materiality, which, in turn, influences both human consciousness and language. This is why the author asks about the role of science in Thomas’ poetry and about the influence that “the machine” has on language and consciousness.Joanna SoćkoSilent Life of Letters. On Interconnections between Language and Nature in the Poetry of R.S. Thomas.The essay sets out to explore R.S. Thomas’ (1913–2000) vision of the problematic relations between the man, the nature and their Creator. In the context of contemporary critique as well as the 20th century, post-husserlian philosophy, the author analyses Thomas’ cosmological poems and represents, on the one hand, the place that both man and God take in the creation and, on the other, the sacramental relationship between the human and the nature. What is important from this perspective is the material existence of both man and nature, which enables mutual infiltration that leads to discovery of imperceptible dimension of materiality, which, in turn, influences both human consciousness and language. This is why the author asks about the role of science in Thomas’ poetry and about the influence that “the machine” has on language and consciousness
Educação em saúde na perspectiva da promoção da saúde em grupo de adolescentes
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-graduação em Saúde Coletiva, Florianópolis, 2013.This study focused on health education rooted in the ideas of educator Paulo Freire with the teenagers, from the perspective of health promotion. Adolescents as social actors construct certain way of being in the world, with this conception, the realization of an educational practice participatory and dialogic facing criticism and reflection in a collective favors the transformation of their knowledge, fostering opportunities, among other things, to promote their health. The study aimed to analyze the perception of health among adolescents and the educational experiences which foster participation, autonomy and emancipation. This is a qualitative research, exploratory, descriptive, developed with adolescents participants in the action extension "Dramatizing the Children's Literature" having age between 13 and 14 years, the State School of Abigail Santos Correa in Matinhos - Paraná. The approach of the Circle of Culture of Paulo Freire provided that the subjects had difficulty in verbalizing and participation, although the researcher stimulate critical dialogue and reflective. Data analysis by dialectic hermeneutic possible interpretation and understanding, at the same time the possibility of decoupling and critical. Points out the ethical principles in accordance with Resolution 196/96. From the analysis and discussion of the concepts of the disease process by adolescents, it was found that the process was slow and gradual understanding expanded health to meet the social determination, but the autonomy and emancipation were practically null. Considers the importance of the continuity of actions to foster active, emancipated and autonomous subjects
Czwarty wymiar. Poezja R.S. Thomasa wobec pytania o (nie)obecność
No full textThe Fourth Dimension. R.S. Thomas’s Poetry and the Question of God’s AbsenceThe text deals with the poetry of R.S. Thomas (1913−2000) – a British author and an Anglican priest in the Church of Wales – whose works are full of controversial (given his priesthood) statements concerning the absence of God. As a lot of Thomas’s poems convey thoughts intersecting with post-secular reflection on the death of God, rooted in Derrida’s questioning of the “metaphysics of presence,” the article aims at tracing the inspirations behind Thomas’s quasi-religious poetry. The point of departure for this reflection is the poet’s recollection of being left by his parents alone for the first time. The impression of an empty house turns out to be an experience which shaped the poet’s attitude towards the disenchanted space he lives in. Although most critics claim that the apparent absence of God in Thomas’s poetry results directly from the tradition of theological via negativa, the author of the article pays attention to those characteristics which differentiate Thomas’s spirituality from the theological tradition and the most important difference between the poet’s attitude and the traditional model of Christian contemplation turns out to be time, or, more precisely, the temporal discrepancy between the possible accessibility of the transcendent being and the man’s ability to “catch it at work.
Czwarty wymiar. Poezja R.S. Thomasa wobec pytania o (nie)obecność
No full textThe Fourth Dimension. R.S. Thomas’s Poetry and the Question of God’s AbsenceThe text deals with the poetry of R.S. Thomas (1913−2000) – a British author and an Anglican priest in the Church of Wales – whose works are full of controversial (given his priesthood) statements concerning the absence of God. As a lot of Thomas’s poems convey thoughts intersecting with post-secular reflection on the death of God, rooted in Derrida’s questioning of the “metaphysics of presence,” the article aims at tracing the inspirations behind Thomas’s quasi-religious poetry. The point of departure for this reflection is the poet’s recollection of being left by his parents alone for the first time. The impression of an empty house turns out to be an experience which shaped the poet’s attitude towards the disenchanted space he lives in. Although most critics claim that the apparent absence of God in Thomas’s poetry results directly from the tradition of theological via negativa, the author of the article pays attention to those characteristics which differentiate Thomas’s spirituality from the theological tradition and the most important difference between the poet’s attitude and the traditional model of Christian contemplation turns out to be time, or, more precisely, the temporal discrepancy between the possible accessibility of the transcendent being and the man’s ability to “catch it at work.
MANOVA modelling of a chiropractic longitudinal study using multiple imputation
No full textThe purpose of this report is to present the detailed statistical analysis of a randomised, placebo-controlled trial comparing two different treatment modalities to an intervention of no known benefit for people with acute or subacute thoracic spine pain.
The therapy arms consist of Spinal Manipulative Therapy (SMT) and Graston Technique (GT) and the placebo is a non-functional ultrasound. A placebo group was utilised because at present there are no proven treatments for non-specific thoracic pain. This trial is registered with the Australia and New Zealand Clinical Trials Registry. Ethics approval has been granted by Murdoch University Human Research and Ethics Committee, number 2007/274.
The aim of this three arm trial was to test the efficacy of SMT and GT as independent modalities compared to detuned ultrasound for the outcomes of pain and disability. The latter were measured using the Visual Analogue Scale (VAS) and a modified Oswestry Back Pain Disability Index. The study was conducted at the Murdoch University Chiropractic student clinic in Perth, Australia, and the protocol published in Crothers et al (2008).
In this report, Section 2 provides an initial exploratory analysis of the data, Section 3 outlines the statistical models used in the final analysis, Section 4 defines these models in mathematical terms, Section 5 discusses the management of missing values via multiple imputation and Section 6 presents the results of the statistical modelling and hypothesis tests. The clinical study will be published in full elsewhere
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