2,735 research outputs found
Selected Epistles of George Fox
Get PDF15 p. Text was provided by Ellis Hein. The text is in the public domain
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
MOSFIRE SPECTROSCOPY of QUIESCENT GALAXIES at 1.5 < z < 2.5. I. EVOLUTION of STRUCTURAL and DYNAMICAL PROPERTIES
No full textWe present deep near-infrared spectra for a sample of 24 quiescent galaxies in the redshift range 1.5 < z < 2.5 obtained with the MOSFIRE spectrograph at the W. M. Keck Observatory. In conjunction with a similar data set we obtained in the range 1 < z < 1.5 with the LRIS spectrograph, we analyze the kinematic and structural properties for 80 quiescent galaxies, the largest homogeneously selected sample to date spanning 3 Gyr of early cosmic history. Analysis of our Keck spectra together with measurements derived from associated Hubble Space Telescope images reveals increasingly larger stellar velocity dispersions and smaller sizes to redshifts beyond z ∼ 2. By classifying our sample according to Sérsic indices, we find that among disk-like systems the flatter ones show a higher dynamical to stellar mass ratio compared to their rounder counterparts, which we interpret as evidence for a significant contribution of rotational motion. For this subset of disk-like systems, we estimate that V s, the ratio of the circular velocity to the intrinsic velocity dispersion, is a factor of two larger than for presentday disky quiescent galaxies. We use the velocity dispersion measurements also to explore the redshift evolution of the dynamical to stellar mass ratio, and to measure for the first time the physical size growth rate of individual systems over two distinct redshift ranges, finding a faster evolution at earlier times. We discuss the physical origin of this time-dependent growth in size in the context of the associated reduction of the systematic rotation
MOSFIRE Spectroscopy of Quiescent Galaxies at 1.5 < z < 2.5. II. Star Formation Histories and Galaxy Quenching
Get PDFWe investigate the stellar populations for a sample of 24 quiescent galaxies at 1.5 < z < 2.5 using deep rest-frame optical spectra obtained with Keck MOSFIRE. By fitting templates simultaneously to the spectroscopic and photometric data and exploring a variety of star formation histories, we obtain robust measurements of median stellar ages and residual levels of star formation. After subtracting the stellar templates, the stacked spectrum reveals the Hα and [N ii] emission lines, providing an upper limit on the ongoing star formation rate of 0.9 ± 0.1 yr -1 . By combining the MOSFIRE data with our sample of Keck LRIS spectra at lower redshift, we analyze the quiescent population at 1 < z < 2.5 in a consistent manner. We find a tight relation (with a scatter of 0.13 dex) between the stellar age and the rest-frame U - V and V - J colors, which can be used to estimate the age of quiescent galaxies, given their colors. Applying this age-color relation to large photometric samples, we are able to model the number density evolution for quiescent galaxies of various ages. We find evidence for two distinct quenching paths: a fast quenching that produces compact post-starburst systems and a slow quenching of larger galaxies. Fast quenching accounts for about a fifth of the growth of the red sequence at z ∼ 1.4 and half at z ∼ 2.2. We conclude that fast quenching is triggered by dramatic events, such as gas-rich mergers, while slow quenching is likely caused by a different physical mechanism
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
Get PDFJoanna 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
Czwarty wymiar. Poezja R.S. Thomasa wobec pytania o (nie)obecność
Get PDFThe 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.
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