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This Element reviews the current state of what is known about the visual and vestibular contributions to our perception of self-motion and orientation with an emphasis on the central role that gravity plays in these perceptions. The Element then reviews the effects of impoverished challenging environments that do not provide full information that would normally contribute to these perceptions (such as driving a car or piloting an aircraft) and inconsistent challenging environments where expected information is absent, such as the microgravity experienced on the International Space Station.
The conclusion summarises the main argument of the book: that the mirror-image, as an object and as a metaphor, was critical to the mimetic definition of painting that we recognise as the key pictorial development of Renaissance art. If perspective was painting’s means, the mirror was its exemplum. Tracing the conceptual elaboration of the reflective image, it concludes that the prolific representation of the inset-mirror motif within early modern painting was both the rebus and matrix of its own pictorial representation.
What is the threshold that intervenes between one mind and another, across which the act of looking takes place?
This essay addresses this question, in relation to the work of Samuel Beckett, W. G. Sebald and J. M. Coetzee. All three writers are centrally concerned with what I here call the ‘threshold of vision’ – and for all three writers, to think this threshold requires an act of ethical imagination. This is the case for the exchange of any look between one consciousness and another; but for all three writers this exchange becomes particularly charged when it is shared between human and animal. The essay reads the act of looking through this relation between human and nonhuman, to produce a critical account of the politics of shared life, as this exceeds our given taxonomies for imagining consciousness.
It was a privilege to attend the symposium Defining Health Law for the Future, and join with so many of Georgia State University College of Law Professor Emerita Charity Scott’s colleagues and friends, supporters, former students, mentees, and presenters. It was a symposium that fittingly served as a tribute to Charity and the remarkable impact she had on the many communities she touched. To the Harrell/Scott family — thank you so much for helping us celebrate Charity and her work.
The integration of ‘AI’ technologies into weapon systems introduces a complex dimension to international relations and security, championing technological solutions for enduring warfare challenges, notably enhancing ‘situational awareness’ through advances such as automated ‘vision’. However, the discourse, particularly in Western militaries like that of the United States, often overlooks inherent limitations and issues in AI-based warfare. This paper explores ‘AI’s’ implications for military vision by inter alia scrutinising the US military’s Joint All-Domain Command and Control (JADC2) process. It argues that the US military actively transforms the observation, decision, and action apparatus, progressively substituting human vision and decision-making, leading to a multidimensional de-visualisation. This denotes fundamental changes in human perception, reshaping knowledge, control, and agency dynamics. In conclusion, the paper suggests an imminent era of de-visualisation in the military – a deliberate relinquishment of human control for perceived military efficiency and effectiveness. This marks a transformative shift, urging nuanced consideration of the profound impact of ‘AI’ technologies on warfare dynamics.
Early modern printmakers trained observers to scan the heavens above as well as faces in their midst. Peter Apian printed the Cosmographicus Liber (1524) to teach lay astronomers their place in the cosmos, while also printing practical manuals that translated principles of spherical astronomy into useful data for weather watchers, farmers, and astrologers. Physiognomy, a genre related to cosmography, taught observers how to scrutinize profiles in order to sum up peoples' characters. Neither Albrecht Dürer nor Leonardo escaped the tenacious grasp of such widely circulating manuals called practica. Few have heard of these genres today, but the kinship of their pictorial programs suggests that printers shaped these texts for readers who privileged knowledge retrieval. Cultivated by images to become visual learners, these readers were then taught to hone their skills as observers. This book unpacks these and other visual strategies that aimed to develop both the literate eye of the reader and the sovereignty of images in the early modern world.
Felix wrote his life of St. Guthlac also during the zenith of Latin writings in Anglo-Saxon England, namely in the early eighth century. In vivid, distinctive Latin Felix tells of the experiences of this solitary who went off into the fens of East Anglia to devote himself to God at Crowland, including his dramatic encounters with the demons of hell and various unusual miracles, including the retrieval of a parchment folio carried off by a thieving magpie.
Optic nerve hypoplasia (ONH) and septo-optic-pituitary dysplasia (SOD) are neurodevelopmental disorders associated with congenital visual impairment. Our aim was to investigate associations between several ophthalmic and neuroimaging features in patients with ONH/SOD.
Methods:
A retrospective chart and neuroimaging review was performed in patients with ONH/SOD. Ophthalmic signs (e.g., monocular best-corrected visual acuity [BCVA], nystagmus, and strabismus) and neuroimaging data were extracted and their associations were investigated.
Results:
There were 128 patients (70 males) with ONH/SOD who had neuroimaging. Their mean age at the end of the study was 13.2 (SD: 7.5) years. Ophthalmic data were available on 102 patients (58 males). BCVA varied from normal to no light perception. There were statistically significant associations between: (A) Reduced optic nerve or chiasm size on neuroimaging and more severely impaired BCVA and (B) laterality of the reduced optic nerve or chiasm size on neuroimaging and laterality of: (1) The eye with reduced BCVA, (2) small optic disc size, and (3) RAPD, if present (p ≤ 0.0002 each). The presence of symmetrically small optic nerves on MRI was significantly more common in patients with nystagmus than when nystagmus was absent (N = 96, 75% vs. 38.6%, p < 0.0001). The presence of neuronal migration disorders, their type and laterality were not associated with BCVA and laterality of the reduced BCVA.
Conclusion:
The functional and structural associations in ONH are consistent with the impaired visual function that results from the hypoplastic anterior visual pathways. However, these associations were not perfectly concordant making prediction of adult BCVA challenging in these patients.
Since the mid-1700s, poets and scholars have been deeply entangled in the project of reinventing prophecy. Moving between literary and biblical studies, this book reveals how Romantic poetry is linked to modern biblical scholarship's development. On the one hand, scholars, intellectuals, and artists discovered models of strong prophecy in biblical texts, shoring up aesthetic and nationalist ideals, while on the other, poets drew upon a counter-tradition of destabilizing, indeterminate, weak prophetic power. Yosefa Raz considers British and German Romanticism alongside their margins, incorporating Hebrew literature written at the turn of the twentieth century in the Russia Empire. Ultimately she explains the weakness of modern poet-prophets not only as a crisis of secularism but also, strikingly, as part of the instability of the biblical text itself. This title is part of the Flip it Open Programme and may also be available Open Access. Check our website Cambridge Core for details.
This article proposes that Horace's Epodes and Ovid's Metamorphoses open with significant acrostics that comprise the first two letters, in some cases forming syllables, of successive lines: IB-AM/IAMB (Epod. 1.1–2) and IN-CO-(H)AS (Met. 1.1–3). Each acrostic, it will be argued, tees up programmatic concerns vital to the work it opens: generic identity and the interrelation of form and content (Epodes), etymology and monumentality (Metamorphoses). Moreover, as befits their placement at the head of collections, both acrostics negotiate the challenge of literary commencement. The introduction reviews recent developments in acrostic studies and discusses important predecessors and parallels for Horace's and Ovid's ‘two-letter’ and syllabic acrostics. Two subsequent sections examine the acrostics singly, and a conclusion compares the dialogues that these acrostics open between author and reader, underscoring the welcome challenge which Ovid's acrostic offers to the prevailing scholarly view that this form of wordplay is a strictly visual affair.
Of all the Merovingian kings who came after Clovis, none has received more accolades than Dagobert I, considered to have been the last effective Merovingian, succeeded by increasingly less capable kings until the dynasty’s demise. Dagobert as a literary convention nevertheless had to be constructed, a process that began in the Chronicle of Fredegar. Fredegar’s portrayal is favorable up to a point, beyond which the chronicler singled out the king for reproof. The idealization of Dagobert reached new heights with the ninth-century Gesta Dagoberti I regis Francorum, which accentuated the king’s monastic patronage, particularly regarding Saint-Denis, where the composition was penned. In the early tenth century, Regino of Prüm used the Gesta Dagoberti to narrate the life ofDagobert in his Chronicle. The character Regino extracted from the Gesta Dagoberti was remolded to serve different aims. This chapter follows the story as it was related in Fredegar and the transformations it underwent in the Gesta Dagoberti. It then turns to the adaptation of the hagiographically inflected Dagobert narrative back into historiography in the tenth-century Chronicle of Regino of Prüm.
While Ambrose of Milan was a major actor on the ecclesiastical and political stage of late antiquity, he was also a devoted catechist and theologian. This chapter focuses on how Ambrose trained the spiritual senses of catechumens throughout Lenten and Eastern catechesis. In Lenten sermons on the patriarchs, Ambrose focused on baptism as a death to physical ways of seeing. In Holy Week sermons (On the Hexameron and Explanatio symboli), he sought to restructure catechetical knowledge by offering pro-Nicene accounts of God and creation. In mystagogical sermons (De mysteriis and De sacramentis), he gave neophytes instruction on how to perceive the spiritual meaning of the Christian rites.
This introductory essay to the volume sets out the volume’s form and purpose, and then provides advance introduction of each of its component essays in turn. Since the volume comes together as a tightly organised and cumulative introduction to David Tracy, this essay forms its own concerted introduction to Tracy parallel to the performance of the book as a whole.
David Tracy is arguably the most influential Roman Catholic theologian writing in English of the past fifty years, both internationally and beyond confessional borders. His generous and ever-expanding conversations (says contributor Willemien Otten) 'make the future of theology now'. Tracy himself says that they lead him, like Dante, to 'the love that moves the sun and the other stars'. Tracy's most famous book, The Analogical Imagination, is now over four decades old. Yet, in two volumes of his essays published in 2020, Tracy emphasises the ground-breaking new work that he did in the 2010s. His mature theological and cultural vision is in need of fresh assessment, which this book provides. An international cohort of experts introduces the core themes of Tracy's thought, critically exploring their relevance for theology today. Tracy offers a short response of his own, as well as the edited text of a previously unpublished and recent lecture.
The chapter explores translation between images and language through the practice of audio description for blind and partially sighted theatre audiences. This practice exceeds analytical models such as ekphrasis or intersemiotic translation because of the particular circumstances in which the texts are received: they are performed live alongside their sources (set, costume, lighting, gestures), and in dialogue with other performance modalities (such as live and recorded sound). The embodied nature of the practice affects how the describer constructs a spectatorial ‘gaze’, particularly in relation to performers’ bodies. Examples are drawn from two performances that foreground bodies and the gaze: Beauty and the Beast (Julie Atlas Muz and Mat Fraser, 2013), and a short cabaret act, Scarf Dance by Amelia Cavallo. The latter performance suggests ways in which attention to the gaze in burlesque might help to develop a ‘critical audio description’.
Vision science combines ideas from physics, biology, and psychology. The language and ideas of mathematics help scientists communicate and provide an initial framing for understanding the visual system. Mathematics combined with computational modeling adds important realism to the formulations. Together, mathematics and computational tools provide a realistic estimate of the initial signals the brain analyzes to render visual judgments (e.g., motion, depth, and color). This chapter first traces calculations from the representation of the light signal, to how that signal is transformed by the lens to the retinal image, and then how the image is converted into cone photoreceptor excitations. The central steps in the initial encoding rely heavily on linear systems theory and the mathematics of signal-dependent noise. We then describe computational methods that add more realism to the description of how light is encoded by cone excitations. Finally, we describe the mathematical formulation of the ideal observer using all the encoded information to perform a visual discrimination task, and Bayesian methods that combine prior information and sensory data to estimate the light input. These tools help us reason about the information present in the neural representation, what information is lost, and types of neural circuits for extracting information.
Focusing on the Middle English poem, Pearl (with evidence from other literary works), this essay considers how the initial situation of the Dreamer explores a half-dozen principles for literary invention that are distinctively medieval, including personal displacement and feelings of anxiety, bewilderment and marvelling. These qualities define the initial state of mind which enables the Dreamer’s visions to occur and develop. Aristotle wrote in his Metaphysics (I. 2) that philosophising begins with wondering and questioning, a principle revered throughout the Middle Ages. Though all these elements of what we now call ‘creativity’ have their roots in practices of invention and argumentation described in ancient philosophy and rhetoric, the particular shapes that these classical principles assume by the late Middle Ages derive from long-established traditions of monastic meditation and contemplative envisioning more than from academic rhetoric and logic. Bonaventure’s opening to his Itinerarium mentis ad Deum recounts the marvel of Francis of Assisi’s seraphic vision, adapting it as a general method for meditation; Chaucer’s Squire’s Tale turns the marvels of the flying horse and visionary mirror into problems in optics and engineering. Pearl turns the dreamer’s initial wondering within a brilliant fantasy to the means for understanding his own human condition.
As my second 5-year term as its editor-in-chief begins, it is important to review what BJPsych Open has accomplished, its areas of growth and what should be our future vision for the Journal. The keyword throughout this editorial is growth, with emphasis on growth in quality, for meaningful growth can only exist with increased quality. The original remit remains the correct long-term direction for the Journal, with the important modifier ‘relevance’ added to ensure quality – a general psychiatric journal with high-quality, methodologically rigorous and relevant publications, with relevance to the advancement of clinical care, patient outcomes, the scientific literature, research and policy. During this second term, I desire to expand the editorial board to fill expertise and diversity gaps; increase editorials and commentaries highlighting specific articles and timely events with psychiatric themes; focus on thematic series driven by the editorial board; and address under-represented topics.
The visual system of domestic poultry evolved in natural light environments, which differ in many respects from the artificial light provided in poultry houses. Current lighting systems are designed mainly around human vision and poultry production, ignoring the requirements of poultry vision and the functional development of visual abilities during rearing. A poor correlation between the light provided and that required for effective vision may influence visually mediated behaviours such as feeding and social interaction, leading to distress and poor welfare. To understand fully the impact of the light environment on the behaviour and welfare of domestic poultry we need (i) to measure the physical properties of the light environment in a standard and relevant manner; (ii) to identify the limits of visual abilities in various light environments; (iii) to determine how light environments during rearing may disrupt the functional development of vision; and (iv) to resolve how visual abilities and lighting interact to affect visually mediated behaviour. Some conclusions can be drawn about the impact of current lighting regimes on bird welfare but there remains a pressing need to resolve various issues in this interaction. We propose, first, that dark periods should have a minimum duration of six hours; second, that bright light should be used in cases where pecking damage and cannibalism do not pose a problem; and third, that it is unlikely that the 100 Hz flicker associated with fluorescent light can be perceived by poultry. With less certainty, we can suggest that ultraviolet-supplemented lighting may have some welfare benefits, and that very dim lighting may adversely affect ocular development. We can only speculate on other issues, such as preferences and motivations for different coloured lighting or the ways in which lighting affects recognition of conspecifics. Several organisations and authorities have issued guidelines for poultry house lighting that strive to safeguard welfare and that are consistent with our current, but limited, understanding. One omission is a standard system for measuring light levels in poultry houses. Illumination with natural daylight would be an ideal solution to many lighting problems. Although some systems require artificial lighting for production purposes, we argue that it may be possible to rear birds humanely in artificial environments that contain some features of natural light. These features should be those for which poultry show some motivation, or whose exclusion would damage visual development.
This chapter argues that thinking about Roberto Bolaño in the context of journalism and mass culture means recognizing how mainstays of globalized twentieth-century journalistic communication – photographic realism, reportage with a pretension of objectivity, investigative journalism – as well as discourses about literature, have circulated differently in Latin America, Europe, and the United States. Explores in particular the convergences and divergences between Latin American and Spanish crónicas and North American New Journalism in Bolaño’s fiction and in his own newspaper writing, the essay argues that Bolaño’s portrayal of the daily cultural and political contexts one confronts in the newspaper reflects his suggestion that readers are always exiles, and that they produce a commentary on seeing as both a journalistic practice and a metaphor for social understanding. Bolaño draws on, but also rewrites, the history of literary journalism in a wider Atlantic world, even as he comments on the superficiality of mass media and culture. Discussing Bolaño’s engagement with cronistas such as Rubén Darío, Enrique Gómez Carrillo, Carlos Monsiváis, and Pedro Lemebel, the chapter includes discussions of 2666, Los detectives salvajes, Bolaño’s short stories, and articles he wrote for newspapers and magazines in Spain and Chile.