Colour, seeing, and seeing colour in medieval literature

This thesis re-approaches medieval literature in terms of its investment in visuality in general and chromatic perception in particular. The introduction raises the philosophical problem off-colour: its status as an object for science, role in perception, and relationship to language and meaning as expressed within inter-subjective evaluation. Two modes of discourse for colour studies of medieval literature are proposed: the phenomenological (from the philosophical tradition of such as Maurice Merleau-Ponty) seeking localised networks and patterns of inter-subjective, embodied, perceptual meanings and values; and linguistic (informed by the philosophical psychology and language philosophy of Ludwig Wittgenstein), focusing on the lexicalisation of colour experience and creation of semantic distinctions corresponding with changing colour concepts, which in turn shape individual perceptions (both first-hand experience and that of reading). Part One introduces key medieval ideas and theories pertaining to visual perception in general, and chromatic perception in particular. The authority for, and influence on medieval writers of Plato's Timaeus, Aristotle's De Anima and Parva Naturalia, and relevant biblical material is considered. Subsequent chapters explore Patristic and Neo-Platonist developments in extramissive thought, locating within this tradition the roots of a synthesis of natural philosophy with Christian theology that is found in later medieval thought and its dealings with perception and colour. A key movement in the theology of light in relation to colour is connected to the wider philosophical movement from largely "extramissive" to largely "intromissive" models of perception. This shift in theory and its significance for colour perception is explained in terms of the impact of Aristotle's material colour theory as found in De anima and the De sensti et sensato section of his Parva Naturalia from the late twelfth century onwards. The part concludes with a detailed study of the nineteenth chapter of Bartholomaeus Anglicus's thirteenth-century encyclopedia, De Proprietatibus Rerum, which provides access to an important range of ideas and sources relevant for accessing the medieval mind in its intellectualized perception of colour. Lastly, such philosophical and theological sources and ideas as are found in Part One are compared with relevant examples from literary texts, ranging from the Middle English poem, The Parliament of the Three Ages, to Christine de Pisan's Le Livre de la Cite des Dames. Part Two treats colour perception in relation to a particular medieval phenomenon: the rise of medieval heraldry and the armorial function of the herald. It considers the spiritual and secular ideologies of chivalry and their relationship to armorial displays as found portrayed and construed in various genres of chivalric literature. Texts under discussion include books of chivalry and arms from the early thirteenth to fourteenth centuries, such as those principally indebted to New Testament armorial allegory and motif (from writers such as Ramon Llull to Geoffrey de Charny), to later fourteenth-century treatises employing Aristotle’s De sensu et sensato to establish a secular hierarchy of chivalric colours. The study culminates with Part Three, offering responses to and discussions of particular medieval fictions in terms of their phenomenological, linguistic and intertextual treatment of colour perception. Medieval texts addressed include, amongst others, Le Roman de la Rose by Guillaume de Lorris and Jean de Meun, and four Middle English metrical romances: Sir Gowther, Sir Amadace, Sir Launfal and Sir Gawain and the Green Knight

An overview of historical and contemporary concrete shells, their construction and factors in their general disappearance

Only through understanding why concrete shells’ loss in popularity over the course of modern history can designers be equipped with the skills to create and apply this type of construction. Through modifications to design processes, construction stages, material understanding and relevant formwork improvements will architects and designers be able to meet the demands of the 21st century and beyond. To understand why concrete shells are no longer commonly built is to understand its construction process. An amorphous material, the fundamental relationship between formwork and the resultant concrete shell needs to be raised, appreciated, understood and analyzed for a holistic understanding of concrete shells. Through understanding this, issues and factors affecting concrete shells can be tackled and designed out in reviving this type of structures because they can be efficient in structural performance, economical in cost and provide high aesthetic value. This paper discusses concrete shells as an architectural solution by asking the question to what constituted their popularity and factors that led to their demise in the modern age of technological advancement, construction process and environmental concerns. This paper presents a cultural perspective and an overview of seminal, historical and contemporary concrete shells so as to bring about a renaissance of such structures in our built environment once again because of all the benefits it can offer.</p

Enhancing surface heat transfer by carbon nanofins: towards an alternative to nanofluids?

Background: Nanofluids are suspensions of nanoparticles and fibers which have recently attracted much attention because of their superior thermal properties. Nevertheless, it was proven that, due to modest dispersion of nanoparticles, such high expectations often remain unmet. In this article, by introducing the notion of nanofin, a possible solution is envisioned, where nanostructures with high aspect-ratio are sparsely attached to a solid surface (to avoid a significant disturbance on the fluid dynamic structures), and act as efficient thermal bridges within the boundary layer. As a result, particles are only needed in a small region of the fluid, while dispersion can be controlled in advance through design and manufacturing processes. Results: Toward the end of implementing the above idea, we focus on single carbon nanotubes to enhance heat transfer between a surface and a fluid in contact with it. First, we investigate the thermal conductivity of the latter nanostructures by means of classical non-equilibrium molecular dynamics simulations. Next, thermal conductance at the interface between a single wall carbon nanotube (nanofin) and water molecules is assessed by means of both steady-state and transient numerical experiments. Conclusions: Numerical evidences suggest a pretty favorable thermal boundary conductance (order of 107 W·m-2·K-1) which makes carbon nanotubes potential candidates for constructing nanofinned surface

The Interaction of Hypotaurine and Other Sulfinates with Reactive Oxygen and Nitrogen Species:A Survey of Reaction Mechanisms

Considerable strides have been made in understanding the oxidative mechanisms involved in the final steps of the cysteine pathway leading to taurine. The oxidation of sulfinates, hypotaurine and cysteine sulfinic acid, to the respective sulfonates, taurine and cysteic acid, has never been associated with any specific enzyme. Conversely, there is strong evidence that in vivo formation of taurine and cysteic acid is the result of sulfinate interaction with a variety of biologically relevant oxidants. In the last decade, many experiments have been performed to understand whether peroxynitrite, nitrogen dioxide and carbonate radical anion could be included in the biologically relevant reactive species capable of oxidizing sulfinates. Thanks to this work, it has been possible to highlight two possible reaction mechanisms (direct and indirect reaction) of sulfinates with reactive oxygen and nitrogen species.The sulfinates oxidation, mediated by peroxynitrite, is an example of both reaction mechanisms: through a two-electron-direct-reaction with peroxynitrite or through a one-electron-indirect-transfer reaction. In the indirect mechanism, the peroxynitrite homolysis releases hydroxyl and nitrogen dioxide radical and in addition the degradation of short-lived adduct formed by peroxynitrite and CO2 can generate carbonate radical anion. The reaction of hypotaurine and cysteine sulfinic acid with peroxynitrite-derived radicals is accompanied by extensive oxygen uptake with the generation of transient intermediates, which can begin a reaction by an oxygen-dependent mechanism with the sulfonates, taurine, and cysteic acid as final products. Due to pulse radiolysis studies, it has been shown that transient sulfonyl radicals (RSO2(•)) have been produced during the oxidation of both sulfinates by one-electron transfer reaction.The purpose is to analyze all the aspects of the reactive mechanism in the sulfinic group oxidation of hypotaurine and cysteine sulfinic acid through the results obtained from our laboratory in recent years

Core Outcomes for Colorectal Cancer Surgery: A Consensus Study

Background: Colorectal cancer (CRC) is a major cause of worldwide morbidity and mortality. Surgical treatment is common, and there is a great need to improve the delivery of such care. The gold standard for evaluating surgery is within well-designed randomized controlled trials (RCTs); however, the impact of RCTs is diminished by a lack of coordinated outcome measurement and reporting. A solution to these issues is to develop an agreed standard “core” set of outcomes to be measured in all trials to facilitate cross-study comparisons, meta-analysis, and minimize outcome reporting bias. This study defines a core outcome set for CRC surgery. Methods and Findings: The scope of this COS includes clinical effectiveness trials of surgical interventions for colorectal cancer. Excluded were nonsurgical oncological interventions. Potential outcomes of importance to patients and professionals were identified through systematic literature reviews and patient interviews. All outcomes were transcribed verbatim and categorized into domains by two independent researchers. This informed a questionnaire survey that asked stakeholders (patients and professionals) from United Kingdom CRC centers to rate the importance of each domain. Respondents were resurveyed following group feedback (Delphi methods). Outcomes rated as less important were discarded after each survey round according to predefined criteria, and remaining outcomes were considered at three consensus meetings; two involving international professionals and a separate one with patients. A modified nominal group technique was used to gain the final consensus. Data sources identified 1,216 outcomes of CRC surgery that informed a 91 domain questionnaire. First round questionnaires were returned from 63 out of 81 (78%) centers, including 90 professionals, and 97 out of 267 (35%) patients. Second round response rates were high for all stakeholders (>80%). Analysis of responses lead to 45 and 23 outcome domains being retained after the first and second surveys, respectively. Consensus meetings generated agreement on a 12 domain COS. This constituted five perioperative outcome domains (including anastomotic leak), four quality of life outcome domains (including fecal urgency and incontinence), and three oncological outcome domains (including long-term survival). Conclusion: This study used robust consensus methodology to develop a core outcome set for use in colorectal cancer surgical trials. It is now necessary to validate the use of this set in research practice

Deciding Together?:Best Interests and Shared Decision-Making in Paediatric Intensive Care

In the western healthcare, shared decision making has become the orthodox approach to making healthcare choices as a way of promoting patient autonomy. Despite the fact that the autonomy paradigm is poorly suited to paediatric decision making, such an approach is enshrined in English common law. When reaching moral decisions, for instance when it is unclear whether treatment or non-treatment will serve a child’s best interests, shared decision making is particularly questionable because agreement does not ensure moral validity. With reference to current common law and focusing on intensive care practice, this paper investigates what claims shared decision making may have to legitimacy in a paediatric intensive care setting. Drawing on key texts, I suggest these identify advantages to parents and clinicians but not to the child who is the subject of the decision. Without evidence that shared decision making increases the quality of the decision that is being made, it appears that a focus on the shared nature of a decision does not cohere with the principle that the best interests of the child should remain paramount. In the face of significant pressures toward the displacement of the child’s interests in a shared decision, advantages of a shared decision to decisional quality require elucidation. Although a number of arguments of this nature may have potential, should no such advantages be demonstrable we have cause to revise our commitment to either shared decision making or the paramountcy of the child in these circumstances

“A question of trust” and “a leap of faith”-study participants' perspectives on consent, privacy, and trust in smart home research:Qualitative study

BACKGROUND: Ubiquitous, smart technology has the potential to assist humans in numerous ways, including with health and social care. COVID-19 has notably hastened the move to remotely delivering many health services. A variety of stakeholders are involved in the process of developing technology. Where stakeholders are research participants, this poses practical and ethical challenges, particularly if the research is conducted in people’s homes. Researchers must observe prima facie ethical obligations linked to participants’ interests in having their autonomy and privacy respected. OBJECTIVE: This study aims to explore the ethical considerations around consent, privacy, anonymization, and data sharing with participants involved in SPHERE (Sensor Platform for Healthcare in a Residential Environment), a project for developing smart technology for monitoring health behaviors at home. Participants’ unique insights from being part of this unusual experiment offer valuable perspectives on how to properly approach informed consent for similar smart home research in the future. METHODS: Semistructured qualitative interviews were conducted with 7 households (16 individual participants) recruited from SPHERE. Purposive sampling was used to invite participants from a range of household types and ages. Interviews were conducted in participants’ homes or on-site at the University of Bristol. Interviews were digitally recorded, transcribed verbatim, and analyzed using an inductive thematic approach. RESULTS: Four themes were identified—motivation for participating; transparency, understanding, and consent; privacy, anonymity, and data use; and trust in research. Motivations to participate in SPHERE stemmed from an altruistic desire to support research directed toward the public good. Participants were satisfied with the consent process despite reporting some difficulties—recalling and understanding the information received, the timing and amount of information provision, and sometimes finding the information to be abstract. Participants were satisfied that privacy was assured and judged that the goals of the research compensated for threats to privacy. Participants trusted SPHERE. The factors that were relevant to developing and maintaining this trust were the trustworthiness of the research team, the provision of necessary information, participants’ control over their participation, and positive prior experiences of research involvement. CONCLUSIONS: This study offers valuable insights into the perspectives of participants in smart home research on important ethical considerations around consent and privacy. The findings may have practical implications for future research regarding the types of information researchers should convey, the extent to which anonymity can be assured, and the long-term duty of care owed to the participants who place trust in researchers not only on the basis of this information but also because of their institutional affiliation. This study highlights important ethical implications. Although autonomy matters, trust appears to matter the most. Therefore, researchers should be alert to the need to foster and maintain trust, particularly as failing to do so might have deleterious effects on future research

Principles for pandemics:COVID-19 and professional ethical guidance in England and Wales

Abstract Background During the arrival of the COVID-19 pandemic, various professional ethical guidance was issued to (and for) health and social care professionals in England and Wales. Guidance can help to inform and support such professionals and their patients, clients and service users, but a plethora of guidance risked information overload, confusion, and inconsistency. Methods During the early months of the pandemic, we undertook a rapid review, asking: what are the principles adopted by professional ethical guidance in England and Wales for dealing with COVID-19? We undertook thematic content analysis of the 29 documents that met our inclusion criteria. Results The 29 documents captured 13 overlapping principles: respect, fairness, minimising harm, reciprocity, proportionality, flexibility, working together, inclusiveness, communication, transparency, reasonableness, responsibility, and accountability. Conclusions We intend this attempt to collate and outline the prominent principles to be helpful, particularly, for healthcare practice during the COVID-19 pandemic and, hopefully, for future pandemic planning. We also offer some reflections on the guidance and the principles therein. After describing the principles, we reflect on some of the similarities and differences in the guidance, and the challenges associated not only with the specific guidance reviewed, but also with the nature and import of “professional ethical guidance”