1,721,074 research outputs found
The Value of Darkness: A Moral Framework for Urban Nighttime Lighting
No full textThe adverse effects of artificial nighttime lighting, known as light pollution, are emerging as an important environmental issue. To address these effects, current scientific research focuses mainly on identifying what is bad or undesirable about certain types and uses of lighting at night. This paper adopts a value-sensitive approach, focusing instead on what is good about darkness at night. In doing so, it offers a first comprehensive analysis of the environmental value of darkness at night from within applied ethics. A design for values orientation is utilized to conceptualize, define, and categorize the ways in which value is derived from darkness. Nine values are identified and categorized via their type of good, temporal outlook, and spatial characteristics. Furthermore, these nine values are translated into prima facie moral obligations that should be incorporated into future design choices, policy-making, and innovations to nighttime lighting. Thus, the value of darkness is analyzed with the practical goal of informing future decision-making about urban nighttime lighting
Designing for Darkness: Urban Nighttime Lighting and Environmental Values
No full textArtificial illumination has had profound and far-reaching impacts on the development, use, and perceptions of urban nights, and has brought with it many benefits. However, in recent years its adverse costs and effects – commonly referred to as light pollution – have emerged as a topic of concern. Nighttime lighting uses enormous amounts of energy, costs billions of dollars annually, can be detrimental to the health of humans and ecosystems, and cuts off access to a starry night sky. Addressing these impacts, and more fundamentally understanding the underlying values shaping contemporary discourse, is a complex and pressing challenge with moral, aesthetic, political, and technical dimensions. This dissertation takes up this challenge by offering a critical examination of the historical roots and normative presuppositions shaping the concept of light pollution. This critique leads to the proposal of an alternative normative framework: instead of focusing on reducing lighting, it argues for fostering darkness in urban nightscapes. A designing for darkness approach is developed on two interrelated levels. The first is conceptual, exploring the relationship between darkness, illumination, and environmental values. The second is practical, proposing first steps towards realizing darker nights via the responsible design of new and emerging technologies, namely LEDs and autonomous vehicles. Taken together, the chapters of this dissertation weave together a critical investigation and constructive contribution to a pressing urban challenge for the 21st century.Design AestheticsEthics & Philosophy of Technolog
Design for values and the city
No full textThis paper undertakes a critical and constructive investigation into the applicability of value sensitive design (VSD) and design for values (DfV) methodologies for urban technologies, as a means to envision and enact responsible urban innovations. In particular, this paper focuses on the identification and analysis of values in urban technologies. First, an important methodological critique is highlighted, namely the vague articulation of ‘values' in VSD and DfV discourse. Next, cities are characterized as open, dynamic, and evolving systems, with ‘urban technologies’ as co-shapers of this process. This highlights the unique conditions requiring attention in order to arrive at a robust understanding of the relationship between values and urban technologies. Finally, these insights are combined to propose and sketch six heuristic principles aimed at surfacing and analysing values in urban technologies, offering a refinement of value-sensitive methodologies for the context of urban technological innovation.Ethics & Philosophy of Technolog
Effects of ethylenediamine – a putative GABA-releasing agent – on rat hippocampal slices and neocortical activity in vivo
Get PDFThe simple diamine diaminoethane (ethylenediamine, EDA) has been shown to activate GABA receptors in the central and peripheral nervous systems, partly by a direct action and partly by releasing endogenous GABA. These effects have been shown to be produced by the complexation of EDA with bicarbonate to form a carbamate. The present work has compared EDA, GABA and [beta]-alanine responses in rat CA1 neurons using extracellular and intracellular recordings, as well as neocortical evoked potentials in vivo. Superfusion of GABA onto hippocampal slices produced depolarisation and a decrease of field epsps, both effects fading rapidly, but showing sensitivity to blockade by bicuculline. EDA produced an initial hyperpolarisation and increase of extracellular field epsp size with no fade and only partial sensitivity to bicuculline, with subsequent depolarisation, while [beta]-alanine produces a much larger underlying hyperpolarisation and increase in fepsps, followed by depolarisation and inhibition of fepsps. The responses to [beta]-alanine, but not GABA or EDA, were blocked by strychnine. In vivo experiments, recording somatosensory evoked potentials, confirmed that EDA produced an initial increase followed by depression, and that this effect was not fully blocked by bicuculline. Overall the results indicate that EDA has actions in addition to the activation of GABA receptors. These actions are not attributable to activation of [beta]-alanine-sensitive glycine receptors, but may involve the activation of sites sensitive to adipic acid, which is structurally equivalent to the dicarbamate of EDA. The results emphasise the complex pharmacology of simple amines in bicarbonate-containing solution
Light pollution: A case study in framing an environmental problem
No full textLight pollution is a topic gaining importance and acceptance in environmental discourse. This concept provides a framework for categorizing the adverse effects of nighttime lighting, which advocacy groups and regulatory efforts are increasingly utilizing. However, the ethical significance of the concept has, thus far, received little critical reflection. In this paper, I analyze the moral implications of framing issues in nighttime lighting via the concept of light pollution. First, the moral and political importance of problem framing is discussed. Next, the origins and contemporary understandings of light pollution are presented. Finally, the normative limitations and practical ambiguities of light pollution are discussed, with the aim of strengthening the framework through which decisions about urban nighttime lighting strategies are increasingly approached.Ethics & Philosophy of Technolog
Re-envisioning the Nocturnal Sublime: On the Ethics and Aesthetics of Nighttime Lighting
No full textGrounded in the practical problem of light pollution, this paper examines the aesthetic dimensions of urban and natural darkness, and its impact on how we perceive and evaluate nighttime lighting. It is argued that competing notions of the sublime, manifested through artificial illumination and the natural night sky respectively, reinforce a geographical dualism between cities and wilderness. To challenge this spatial differentiation, recent work in urban-focused environmental ethics, as well as environmental aesthetics, are utilized to envision the moral and aesthetic possibilities of a new urban nocturnal sublime. Through articulating the aspirations and constraints of a new urban nocturnal experience, this paper elucidates the axiological dimensions of light pollution, draws attention to nightscapes as a site of importance for urban-focused (environmental) philosophy, and examines the enduring relevance of the sublime for both the design of nighttime illumination and the appreciation of the night sky.Ethics & Philosophy of Technolog
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The Medium of Modernity: Review of Electric Light: An Architectural History by Sandy Isenstadt
No full textEthics & Philosophy of Technolog
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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