It is widely thought that there are limits to how things can perceptually appear to us. For instance, nothing can appear both square and circular, or both pure red and pure blue. Adam Pautz has dubbed such constraints “laws of appearance.” But if the laws of appearance obtain, then what explains them? Here I examine the prospects for an empirical explanation of the laws of appearance. First, I challenge extant empirical explanations that appeal purely to the format of perceptual (...) representation. I then develop a hybrid approach, on which the laws are explained not merely by format, but by two further factors: ecological constraints imposed by our environments, and computational constraints embodied by our perceptual systems. While the hybrid approach implies that the laws of appearance are contingent, I argue that this implication is empirically defensible, since even some of the most intuitively compelling laws have real-world counterexamples. (shrink)

This chapter contains sections titled: Playing the Blues Defining the Blues Wittgenstein to the Rescue Good Blues, Bad Blues, Walking Dead Blues Notes.

Today, in any mature information society, we live neither online nor offline but on life, that is, we increasingly live in that special space that is both analogue and digital, both online and offline. Imagine someone asking whether the water is fresh or salty in the estuary where the river meets the sea. That someone has not understood the special nature of the place. Our information society is that place. And our technologies are perfectly evolved to take advantage of it, (...) like mangroves growing in brackish water. In the mangrove society, machine-readable data, new forms of agency and interactions are constantly evolving. The consequences of such a radical transformation are many, but one is particularly significant and rich in consequences: how should we design the mangrove society, when it comes to the relationship between the natural and the digital? In this text, I argue that the digital blue is a great ally of the environmental green. The two work best in tandem. And if the world will enjoy a sustainable development for the environment that is also socially preferable for humanity, it will be because the green and the blue will have created a virtuous circle of nature and technology. It can be done. There is just no time to waste. (shrink)

Recent research on consumer social responsibility highlights the need to examine psychological drivers of environmentally‐friendly consumption choices in a global context. This article investigates consumers’ willingness to pay (WTP) more for environmentally‐friendly products across 28 European Union (EU) countries, using a sample of 21,514 consumers. A multigroup structural equation modeling analysis reveals significantly different patterns and relationships, in how (a) subjective knowledge about the product's environmental impact, (b) environmental product attitudes, and (c) the perceived importance of the products’ environmental impact (...) influence consumers’ WTP more for environmentally‐friendly products across countries. The hypothesized model predicts WTP for 20 out of 28 countries and the findings show that a “one‐size‐fits‐all” approach is inadequate in capturing the heterogeneity of EU consumers. Hosfstede's cultural dimensions of uncertainty tolerance and individualism explain differences in WTP for environmentally‐friendly products across EU countries. Business, marketing communications, and policy making implications are discussed. (shrink)

Wie kann Europa politisch und gesellschaftlich durch die Möglichkeiten der Digitalisierung profitieren und seine Krisen überwinden, von denen es in der letzten Zeit so geplagt wurde? Wie kann es ein „Humanprojekt“ und die Einheit von „grüner“ Ökologie und „blauer“ Informationstechnik realisieren? In diesem Band präsentiert Luciano Floridi eine Zusammenfassung seiner Thesen, wie sich die Digitalisierung ganz konkret auf politische und soziale Phänomene auswirkt, und wie nun weniger die Dinge als ihre Relationen an Bedeutung gewinnen.Mit kritischen Beiträgen von Manfred Broy, Markus (...) Gabriel, Armin Grunwald, Ruth Hagengruber, Alexander Kriebitz, Christoph Lütge, Raphael Max, Catrin Misselhorn und Malte Rehbein. (shrink)

Heterocyst spacing in blue -green bacteria is widely assumed to be due to a diffusible inhibitor. The inhibitor, a nitrogen-rich compound, probably glutamine, is produced via the N2-fixing enzymes of the heterocyst and in turn serves to suppress the induction of these enzymes and of the differentiation of vegetative cells to heterocysts. This simple morphogenetic mechanism operating in growing cellular filaments ofAnabaena species is investigated on the basis of a continuous and a discrete cellular model, as well as (...) by cell-by-cell simulation of the inhibitor transport. The resulting distances between heterocysts and kinetics of their production are compared with observations, and the values of physical parameters are estimated from the models. (shrink)

Painters are the experts in colour phenomenology. Their business is to use colour to affect our feelings. Psychophysicists are expert in making experimental inferences from behavioural responses to the functional mechanisms of perception. The varying aims of these two groups of people mean that much that is of interest to the one is of little concern to the other. However, in recent times several prominent psychophysicists, such as Floyd Ratliff , Jack Werner and Dorothea Jameson , have thrown much light (...) on painterly practice. Following their lead, I would like to sketch some of the mechanisms that are responsible for many of the features of colour appearance important to the work of visual artists. I will begin with some phenomena that can be accounted for by mechanisms that are reasonably well understood, and then move to phenomena whose underlying basis is less well established. I will conclude with a suggestive experiment and, true to my calling as a philosopher, a piece of downright speculation. (shrink)

It commonly occurs that one person sees a particular colour chip B as saturated blue with no admixture of red or green (i.e., as “uniquely blue”), while another sees it as a somewhat greenish blue. Such a difference is often accompanied by agreement with respect to colour matching – the two persons may mostly agree when asked whether two chips are of the same colour, and this may be so across the whole range of colours. Asked (...) whether B is the same or different from other chips, they mostly agree – though they continue to disagree about whether B is uniquely blue. I shall argue that in such cases neither individual misperceives what colour B is. They differ, rather, in how they perceive the colour of B. (shrink)

Reflectance and spectral power functions are poor predictors of color experiences. Only in completely relativized conditions (single observer, non-metameric set of stimuli, and single set of viewing conditions) is the relationship close. Variation in reflectance of Munsell chips experienced by color-normal observers as having a unique green hue encompasses approximately sixty percent of the complete range of hues falling under the category “green”; and in recent determinations of unique hues, ranges of yellow and green as well as (...) green and blue unique hues overlap. (shrink)

We discuss two modal claims about the phenomenal structure of color experiences: (i) violet experiences are necessarily experiences of a color that is for the subject on that occasion phenomenally composed of red and blue (the modal claim about violet) and (ii) no subject can possibly have an experience of a color that is for it then phenomenally composed of red and green (the modal claim about reddish green). The modal claim about reddish green is undermined (...) by empirical results. We discuss whether these empirical results cast doubt on the other modal claims as well. We argue that this not the case. Our argument is based on the thesis that the best argument for the modal claim about violet is quite different from the best argument for the modal claim about reddish green. To argue for this disanalogy we propose a reconstruction of the best available justification for both claims. (shrink)

The European policies acknowledge greenways and “Green Infrastructure” as strategically planned and delivered networks comprising the broadest range of green spaces and other environmental features. The Aniene River, linking the eastern suburbs of Rome to the City of Tivoli, has been envisaged in a multi-level approach as a Green-Blue Infrastructure able to hinder land use fragmentation and provide new continuity to remainders of open space. In turn, landscape is taken into account as a biodiversity reservoir, the (...) scenery of outstanding cultural heritage and the relevant backdrop of ordinary life. (shrink)

That past patterns may continue in many different ways has long been identified as a problem for accounts of induction. The novelty of Goodman’s ”new riddle of induction” lies in a meta-argument that purports to show that no account of induction can discriminate between incompatible continuations. That meta-argument depends on the perfect symmetry of the definitions of grue/bleen and green/blue, so that any evidence that favors the ordinary continuation must equally favor the grue-ified continuation. I argue that this (...) very dependence on the perfect symmetry defeats the novelty of the new riddle. The symmetry can be obtained in contrived circumstances, such as when we grue-ify our total science. However, in all such cases, we cannot preclude the possibility that the original and grue-ified descriptions are merely notationally variant descriptions of the same physical facts; or if there are facts that separate them, these facts are ineffable, so that no account of induction should be expected to pick between them. In ordinary circumstances, there are facts that distinguish the regular and grue-ified descriptions. Since accounts of induction can and do call upon these facts, Goodman’s meta-argument cannot provide principled grounds for the failure of all accounts of induction. It assures us only of the failure of accounts of induction, such as unaugmented enumerative induction, that cannot exploit these symmetry breaking facts. (shrink)

The hidden strength of Goodman's ingenious "new riddle of induction" lies in the perfect symmetry of grue/bleen and green/blue. The very same sentence forms used to define grue/bleen in terms of green/blue can be used to define green/blue in terms of grue/bleen by permutation of terms. Therein lies its undoing. In the artificially restricted case in which there are no additional facts that can break the symmetry, grue/bleen and green/blue are merely notational (...) variants of the same facts; or, if they represent different facts, the differences are ineffable, and no account of induction should be expected to pick between them. This still obtains in the more interesting case in which we embed grue/bleen in a grue-ified total science; the grue-ified and regular total sciences are merely equivalent descriptions of the same facts. In the most realistic case, we allow additional facts that break the symmetry and then we can also evade Goodman's new riddle by employing an account of induction rich enough to exploit these facts. Unaugmented enumerative induction is not such an account and it is the primary casualty of Goodman's new riddle. (shrink)

Most men and nearly all women have non-defective colour vision, as measured by standard colour tests such as those of Ishihara and Farns- worth. But people vary, according to gender, race and age in their per- formance in matching experiments. For example, when subjects are shown a screen, one half of which is lit by a mixture of red and green lights and the other by yellow or orange light, and they are asked to ad- just the mixture of (...) lights so as to make the two halves of the screen match in colour, they disagree about the location of the match. Where one male subject sees the two sides of the screen as being the same in colour, an- other female subject may see one side as a little redder or greener. And there are corresponding differences with age and race. (shrink)

The last decade has seen a surge of interest and investment in green social prescribing, however, both healthcare and social enterprise has been impacted by the COVID-19 crisis, along with restricted access to public green spaces. This study examines the challenges and opportunities of delivering green social prescribing during and in the aftermath of COVID-19, in the light of goals of green social prescribing to improve mental health outcomes and reduce health inequalities. Thirty-five one-to-one interviews were (...) conducted between March 2020 and January 2022. Interviewees included Link Workers and other social prescribers, general practitioners, managers, researchers, and volunteers working in urban and rural Scotland and North East England. Interview transcripts were analyzed in stages, with an inductive approach to coding supported by NVivo. Findings revealed a complex social prescribing landscape, with schemes funded, structured, and delivered diversely. Stakeholders were in general agreement about the benefits of nature-based interventions, and GPs and volunteers pointed out numerous benefits to participating in schemes such as parkrun. Link Workers were more circumspect about suggesting outdoor activities, pointing out both psychological and practical obstacles, including health anxieties, mobility issues, and transport deficits. Exacerbated by the pandemic, there was a way to go before older and/multi-morbidity clients would feel comfortable and safe to socialize in open air spaces. Our findings support the premise that time spent in open green spaces can alleviate some of the negative mental health effects compounded by the pandemic. However, the creation of healthy environments is complex with population health intrinsically related to socioeconomic conditions. Social disadvantage, chronic ill health and health crises all limit easy access to green and blue spaces, while those in the most socially economically deprived areas receive the lowest quality of healthcare. Such health inequities need to be borne in mind in the planning of schemes and claims around the potential of future nature-based interventions to reduce health inequalities. (shrink)

I have been reading and teaching Maxine Greene’s work for many years. I began teaching philosophy and education classes forty years ago as a doctoral student and have used a Maxine Greene text in every one. I’ve used The Public School and the Private Vision, Teacher as Stranger, Landscapes of Learning, Dialectic of Freedom, Releasing the Imagination, Variations on a Blue Guitar, and many other chapters, articles, and essays.1 I’ve had several opportunities to write about her work, her standing (...) within the philosophy of education community, and her influence on me as a teacher, colleague, and friend. In every instance, I drew a connection between Maxine Greene and John Dewey.... (shrink)

It can happen that a single surface S, viewed in normal conditions, looks pure blue (“true blue”) to observer John but looks blue tinged with green to a second observer, Jane, even though both are normal in the sense that they pass the standard psychophysical tests for color vision. Tye (2006a) finds this situation prima facie puzzling, and then offers two different “solutions” to the puzzle.1 The first is that at least one observer misrepresents S’s color (...) because, though normal in the sense explained, she is not a Normal color observer: her color detection system is not operating in the current condition in the way that Mother Nature intended it to operate. His second solution involves the idea that Mother Nature designed our color detection systems to be reliable with respect to the detection of coarse-grained colors (e.g., blue, green, yellow, orange), but our capacity to represent the fine-grained colors (e.g., true blue, blue tinged with green) is an undesigned spandrel. On this second solution, it is consistent with the variation between John and Jane that both represent the color of S in a way that complies with Mother Nature’s intentions: both represent S as exemplifying the coarse-grained color blue, and since (we may assume) S is in fact blue, both represent it veridically. Of course, they also represent fine-grained colors of S, and, according to Tye, at most one of these representations is veridical (Tye says that only God knows which). But at the level of representation for which Mother Nature designed our color detection systems, both John and Jane (qua Normal observers) are reliable detectors. (shrink)

The Green Revolution in India which was heralded in the 1960‘s was a mixed blessing. Ambitious use of agro-chemicals boosted food production but also destroyed the agricultural ecosystem. Of late Indian farmers and agricultural scientists have realized this and are anxious to find alternatives – perhaps a non-chemical agriculture – and have even revived their age-old traditional techniques of natural farming. Scientists are working to find economically cheaper and ecologically safer alternatives to agro-chemicals. Blue-Green Algae Biofertilizers, Earthworm (...) Vermicomposts, biological control of pests and herbal biopesticides are showing promise. Saline agriculture and sewage farming are also being promoted in India to augment food production in the face of water scarcity. There is a move to search for alternative foods, which are more nutritious, cheaper and have shorter harvest cycles. Farm and food policy in India has to change its outlook before there can be a second green revolution. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy of Music Education Review 11.2 (2003) 157-169 [Access article in PDF] Praxis and the PossibleThoughts on the Writings of Maxine Greene and Paulo Freire Randall Everett Allsup Columbia University Authors in a recent edition of the Philosophy of Music Education Review have assayed various understandings of praxis within the domain of music learning and teaching. 1 Leadened (perhaps) by history, this six-letter word sustains a multiplicity of meanings. (...) Philosophers as disparate as Aristotle, Marx and Engels, Sartre, Marshall Sahlins, Pierre Bourdieu, and David Elliott have represented praxis as a form of cultural-doing—but in many instances, this is where the similarities end. 2 By stirring up the pot, editor Estelle Jorgensen has sought to lighten history's burden, lest the word praxis suffer ossification, territorial over-use, or (worse) over-simplification.My first encounters with the word praxis were not particularly weighty or didactic. In graduate work with Maxine Greene, I would often hear praxis associated with the arts, with possibilities, openings, or alternatives. Greene does not construct a philosophical stance around the word; rather the conditions for praxis exist within the imagination, within "the capacity to look at things as if they could be otherwise." 3 Recalling Emily Dickinson, Greene writes that "imagination lights the possible's slow fuse." 4 Praxis, I think, is not simply the capacity to imagine alternative scenarios, but is instead the slow burning fuse of possibility and action. [End Page 157] This definition connects nicely with Paulo Freire, the revolutionary pedagogue who is of late often paired with Greene. 5 "Human activity," writes Freire, "consists of action and reflection: it is praxis." 6 The result is action upon our world.I must admit that as a long time fan of Freire (and as a student and friend of Greene), I have often wondered what exactly it means to act upon one's world, to name's one's world—especially as a music educator. Can such action lead to the creation of a love song? Can we say that certain art forms like the blues, be-bop, and jam band are more praxial than others? Might an encounter with Brahms lead to potentially transformative action upon my world?Freirian praxis, for sure, is non-neutral; it occurs when we disavow the traditional separation between abstracted learning and real life. After September 11, for example, my freshman music education majors created a requiem for the missing and the dead. This was the most difficult teaching I have ever facilitated. Before beginning our composition, we listened to several movements from the Faure Requiem, particularly the "In Paradisum": "May the choir of angels receive thee, and with Lazarus, once a beggar, mayst thou have eternal rest." We tried to attain Faure's sense of peace and hope; we admired his assurance that those who were gone were at rest, at peace. And we shared stories, and talked about our feelings and our pain. 7During this time, even the ordinary became infused with meaning. Banal pop music, like Enrique Inglesia's Hero, became a tribute song for many, including myself. Suddenly full of significance and relevance, I attended more closely to the simplicity of his chords and the sotto voce color of his voice: Would you die for the one you love? Hold me in your arms tonight. I wanna be your hero... The fact that this was an ordinary love song written some time before the terrorist attacks does not negate my feelings for it. Like Faure's requiem, it brought me a degree of comfort. In addition, I found solace in the music of Aaron Copland, particularly Quiet City. The open intervals seemed to speak of piece, quietude, and space. The opening trumpet recitative was defiant, but introspective—the English horn felt dark and mournful. I wanted to be back in an earlier New York, like the one that Copland knew and loved.Of course, acting upon our world requires inaction: thinking, perceiving, reflecting, reconceptualizing, connecting. For Freire and Greene, transformational or liberatory practice cannot... (shrink)

The paper examines the notion, widespread in the contemporary color science, that there are certain hues, specifically focal red, yellow, green and blue, that are unique or privileged in human prelinguistic color perception, all other chromatic hues being perceptually composed of these. I successively consider and reject all motivations that have been provided for this opinion; namely the linguistic, “phenomenological”, and some minor or historical motivations. I conclude that, contrary to the standard opinion, there is no solid reason (...) to claim that the RYGB hues are unique among colors in a sense that would allow for direct neurophysiological explanation. The notion also has no relevance for the construction of perceptual color spaces and is not defensible as an explanatory principle with respect to the existing crosslinguistic patterns of color categorization. (shrink)

Saunders & van Brakel argue, inter alia, that there is for the claim that there are four unique hues (red, green, blue, and yellow), and that there are two corresponding opponent processes. We argue that this is quite mistaken.

In this target article the following hypotheses are discussed: (1) Colour is autonomous: a perceptuolinguistic and behavioural universal. (2) It is completely described by three independent attributes: hue, brightness, and saturation: (3) Phenomenologically and psychophysically there are four unique hues: red, green, blue, and yellow; (4) The unique hues are underpinned by two opponent psychophysical and/or neuronal channels: red/green, blue/yellow. The relevant literature is reviewed. We conclude: (i) Psychophysics and neurophysiology fail to set nontrivial constraints on (...) colour categorization. (ii) Linguistic evidence provides no grounds for the universality of basic colour categories. (iii) Neither the opponent hues red/green, blue/yellow nor hue, brightness, and saturation are intrinsic to a universal concept of colour. (iv) Colour is not autonomous. (shrink)

According to color realism, object colors are mind-independent properties that cover surfaces or permeate volumes of objects. In recent years, some color scientists and a growing number of philosophers have opposed this view on the grounds that realism about color cannot accommodate the apparent unitary/binary structure of the hues. For example, Larry Hardin asserts, the unitary-binary structure of the colors as we experience them corresponds to no known physical structure lying outside nervous systems that is causally involved in the perception (...) of color. This makes it very difficult to subscribe to a color realism that is supposed to be about red, green, blue, black, and white—that is, the colors with which we are perceptually acquainted.1 Similarly, Evan Thompson says. (shrink)

The degree to which physiology and culture have affected the formation of primitive color categories continues to be a matter of discussion. In this paper the degree of agreement between the ranges of individual color term foci for the four hue-based color categories yellow, green, blue, and red and individual choices of Munsell samples representing for the observers Hering's four unique hues is investigated. The color term focus range data are extracted from the survey results of the 110 (...) unwritten languages of the World Color Survey, also in terms of the Munsell color order system. Agreement of approximately 90% between the two has been found, indicating the likelihood of a strong color vision system related physiological component in the formation of these four primitive hue categories. (shrink)

This study examines the cross‐cultural generality of Hering's (1878/1964) color‐opponent theory of color appearance. English‐speaking and Somali‐speaking observers performed variants of two paradigms classically used to study color‐opponency. First, both groups identified similar red, green, blue, and yellow unique hues. Second, 25 English‐speaking and 34 Somali‐speaking observers decomposed the colors present in 135 Munsell color samples into their component Hering elemental sensations—red,green,blue, yellow, white, and black—or else responded “no term.” Both groups responded no term for many (...) samples, notably purples. Somali terms for yellow were often used to name colors all around the color circle, including colors that are bluish according to Hering's theory. Four Somali Grue speakers named both green and blue elicitation samples by their term for green. However, that term did not name the union of all samples called blue or green by English speakers. A similar pattern was found among three Somali Achromatic speakers, who called the blue elicitation sample black or white. Thus, color decomposition by these Somali‐speaking observers suggests a lexically influenced re‐dimensionalization of color appearance space, rather than a simple reduction of the one proposed by Hering. Even some Somali Green‐Blue speakers, whose data were otherwise similar to English, showed similar trends in yellow and blue usage. World Color Survey data mirror these results. These within‐ and cross‐cultural violations of Hering's theory do not challenge the long‐standing view that universal sensory processes mediate color appearance. However, they do demonstrate an important contribution of language in the human understanding of color. (shrink)

This paper presents an autonomous vision-based obstacle avoidance system. The system consists of three independent vision modules for obstacle detection, each of which is computationally simple and uses a di erent criterion for detection purposes. These criteria are based on brightness gradients, RGB Red, Green, Blue color, and HSV Hue, Saturation, Value color, respectively. Selection of which modules are used to command the robot proceeds exclusively from the outputs of the modules themselves. The system is implemented on a (...) small monocular mobile robot and uses very low resolution images. It has been tested for over 200 hours in diverse environments. Keywords: Vision-based navigation, space exploration, modular design, reactive control, unstructured terrain. (shrink)

Men Brayut is one of the interesting stories of Balinese people since ancient times until present that acts as a source of inspiration in art. This study aimed creating and describing the ceramic sculptures inspired by the Men Brayut story. This research uses qualitative descriptive approach in which the researcher becomes the main instrument. Data collection by observation and documentation. This statue was made using SP Gustami's creation method namely exploration, improvisation and embodiment. The results show that the creation process (...) of ceramic sculpture featuring Brayut image can be separated into two, they are the process of making the main character of Men Brayut and the process of making Brayut‟s children as an ornamental media that can show the image of Brayut on the sculpture. The creation this sculpture was started from the bottom using the combined technique of slab, pinching, and coil. Based on its function, the creation of this statue is functioned as the ornamentation and the practice as well as the ornamentation. This work implemented the green, blue and brown glazes with the combustion tempera-ture was 1200°C. Some of the created works were titled to Joy, Fatigue, Affection, and Affection 2. (shrink)

This paper argues that the distinctiveness of the Hering primary hues – red, green, blue, and yellow – is already evident at the retina. Basic features of spectral sensitivity provide a foundation for the development of unique hue perceptions and the hue categories of which they are focal examples. Of particular importance are locations in color space at which points of minimal and maximal spectral sensitivity and extreme ratios of chromatic to achromatic response occur. This account builds on (...) Jameson & D’Andrade’s (1997) insight about the relationship between the Hering primaries and chromatic/achromatic ratios, Romney & Chiao’s (2009) color appearance model, and Thornton’s (1971; 1999) research on artificial lighting. (shrink)