From the seventeenth-century rift between 'Poussinistes' and Rubénistes', to the genesis of Romanticist aesthetic theories in early nineteenth-century France, ...

Colour information not only helps sustain the survival of animal species by guiding sexual selection and foraging behaviour but also is an important factor in the cultural and technological development of our own species. This is illustrated by examples from the visual arts and from state-of-the-art imaging technology, where the strategic use of colour has become a powerful tool for guiding the planning and execution of interventional procedures. The functional role of colour information in terms of its (...) potential benefits to behavioural success across the species is addressed in the introduction here to clarify why colour perception may have evolved to generate behavioural success. It is argued that evolutionary and environmental pressures influence not only colour trait production in the different species but also their ability to process and exploit colour information for goal-specific purposes. We then leap straight to the human primate with insight from current research on the facilitating role of colour cues on performance training with precision technology for image-guided surgical planning and intervention. It is shown that local colour cues in two-dimensional images generated by a surgical fisheye camera help individuals become more precise rapidly across a limited number of trial sets in simulator training for specific manual gestures with a tool. This facilitating effect of a local colour cue on performance evolution in a video-controlled simulator (pick-and-place) task can be explained in terms of colour-based figure-ground segregation facilitating attention to local image parts when more than two layers of subjective surface depth are present, as in all natural and surgical images. (shrink)

If the so-called 'science wars' are futile shouting-matches between extremists, some of the more bewildering skirmishes have been contested in the realm of colour science and culture. Ethnographers, postmodernists, and Wittgensteinians stress the specificity of local colour naming strategies, or the peculiarity of objects and emotions with which colours are associated, and may confess lingering attraction to Whorf's idea that cultures carve up an intrinsically unstructured colour space into quite arbitrary linguistic categories. Self-proclaimedly hard-headed biological and (...) evolutionary psychologists, in contrast, argue that the pan-human physiology of colour perception determines our colour categorization, and constrains whatever minimal linguistic variability there is. Don Dedrick's wonderful study in the philosophy of cognitive science offers not only a careful survey of the relevant evidence in this stand-off, but also a persuasive set of tools for thinking the issues through quite differently, and for avoiding the dichotomous terms in which the debates have previously been couched. The book should be essential reading for colour scientists, and for philosophers interested in links between cognition and culture; and it offers useful advanced introductions to detailed technical literatures in psychophysics, colour linguistics, and cognitive anthropol. (shrink)

Most objectivist and dispositionalist theories of color have tried to resolve the challenge raised by color variations by drawing a distinction between real and apparent colors. This paper considers such a strategy to be fundamentally erroneous. The high degree of variability of colors constitutes a crucial feature of colors and color perception; it cannot be avoided without leaving aside the real nature of color. The objectivist theory of color defended in this paper holds that objects have locally many different objective (...) colors. Most color variations are then real and result from the extreme richness of color properties. (shrink)

Grapheme-colour synaesthesia is a perceptual experience where graphemes, letters or words evoke a specific colour, which are experienced either as spatially coincident with the grapheme inducer (projector sub-type) or elsewhere, perhaps without a definite spatial location (associator sub-type). Here, we address the question of whether synaesthesia can be rapidly produced using a hypnotic colour suggestion to examine the possibility of ‘hypnotic synaesthesia’, i.e. subjectively experienced colour hallucinations similar to those experienced by projector synaesthetes. We assess the (...) efficacy of this intervention using an “embedded figures” test, in which participants are required to detect a shape (e.g., a square) composed of local graphemic elements. For grapheme-colour synaesthetes, better performance on the task has been linked to a higher proportion of graphemes perceived as coloured. We found no performance benefits on this test when using a hypnotic suggestion, as compared to a no-suggestion control condition. The same result was found when participants were separated according to the degree to which they were susceptible to the suggestion (number of coloured trials perceived). However, we found a relationship between accuracy and subjective reports of colour in those participants who reported a large proportion of coloured trials: trials in which the embedded figure was accurately recognised (relative to trials in which it was not) were associated with reports of more intense colours occupying a greater spatial extent. Collectively, this implies that hypnotic colour was only perceived after shape detection rather than aiding in shape detection via colour-based perceptual grouping. The results suggest that hypnotically induced colours are not directly comparable to synaesthetic ones. (shrink)

Victor Vasarely's (1906–1997) important legacy to the study of human perception is brought to the forefront and discussed. A large part of his impressive work conveys the appearance of striking three-dimensional shapes and structures in a large-scale pictorial plane. Current perception science explains such effects by invoking brain mechanisms for the processing of monocular (2D) depth cues. Here in this study, we illustrate and explain local effects of 2D color and contrast cues on the perceptual organization in terms of (...) figure-ground assignments, i.e. which local surfaces are likely to be seen as “nearer” or “bigger” in the image plane. Paired configurations are embedded in a larger, structurally ambivalent pictorial context inspired by some of Vasarely's creations. The figure-ground effects these configurations produce reveal a significant correlation between perceptual solutions for “nearer” and “bigger” when other geometric depth cues are missing. In consistency with previous findings on similar, albeit simpler visual displays, a specific color may compete with luminance contrast to resolve the planar ambiguity of a complex pattern context at a critical point in the hierarchical resolution of figure-ground uncertainty. The potential role of color temperature in this process is brought forward here. Vasarely intuitively understood and successfully exploited the subtle context effects accounted for in this paper, well before empirical investigation had set out to study and explain them in terms of information processing by the visual brain. (shrink)

Memory research distinguishes two components of episodes—the event or item and the spatial–temporal setting or context in which it occurred. The wordcontextis used either globally to denote the physical, social, or emotional environment at study and test or it is used locally to refer to another word or picture that was paired with a particular target. In this article, we report four experiments that investigated the influence of two different nonverbal local contexts on explicit word recognition and implicit word (...) identification test performance. In each experiment, university students studied words that were displayed against various extra-item local contexts, and the contexts were either the same or different at study and test. What differed across experiments was the nature of the contexts: for Experiments 1 and 2, it was a band of color that stretched across the computer screen, and for Experiments 3 and 4, the context was a colored line drawing. The combined findings from all experiments provide no evidence of memory context effects on priming. By contrast, recognition test performance showed reliable MCEs but only when the local context was a concrete drawing or when it was a color that was target-related or appropriate. The discussion compared these findings with those from previous studies that concerned the cueing effectiveness of verbal and nonverbal extra-item contexts. (shrink)

We propose a new theory to explain the nature and function of subjective experience, as a mechanism that guides the organism towards beneficial outcomes. In simple animals, that guidance takes the form of an affect producing a fitness-enhancing response. In human consciousness, there is not a single response, but a range of potential developments allowing a free choice. That range can be modelled as a local prospect: a field of possibilities centred on the present situation and coloured by valence. (...) Building on neural models of global workspace and adaptive resonance, we suggest how such a prospect could be implemented in the brain: as a halo of activation diffusing from, and feeding back into, a core of circulating activation. Using the thought experiment of qualia inversion, we argue that local prospect theory solves the ‘hard problem of consciousness’. We show how our theory explains key characteristics of consciousness: subjectivity, feeling, free will, agency, transience, continuity, integration, selectivity, intentionality, and ‘what it is like’. (shrink)

Russell and others have argued that the real nature of colour is transparentto us in colour vision. It's nature is fully revealed to us and no further knowledgeis theoretically possible. This is the doctrine of revelation. Two-dimensionalFourier analyses of coloured checkerboards have shown that apparently simple,monadic, colours can be based on quite different physical mechanisms. Experimentswith the McCollough effect on different types of checkerboards have shown thatidentical colours can have energy at the quite different orientations of Fourierharmonic components (...) but no energy at the edges of the checkerboards, thusrefuting revelation. It is concluded that this effect is not explained by a superveniencedispositional account of colour as proposed by McGinn . It was argued that theMcCollough effect in checkerboards was an example of a local mind/body reduction, by which the different characteristics of identical colours falsifies revelation. This reduction being based on both physical and neurological mechanisms led to a clear explanation of the perceive phenomenal effects and thus laid a small bridge over the explanatory gap. (shrink)

My aim in this paper is to defend the view that the processes underlying early vision are informationally encapsulated. Following Marr (1982) and Pylyshyn (1999) I take early vision to be a cognitive process that takes sensory information as its input and produces the so-called primal sketches or shallow visual outputs: informational states that represent visual objects in terms of their shape, location, size, colour and luminosity. Recently, some researchers (Schirillo 1999, Macpherson 2012) have attempted to undermine the idea (...) of the informational encapsulation of early vision by referring to experiments that seem to show that colour recognition is affected by the subject's beliefs about the typical colour of objects. In my view, however, one can reconcile the results of these experiments with the position that early vision is informationally encapsulated. Namely, I put fort a hypothesis according to which the early vision system has access to a local database that I call the mental palette and define as a network of associative links whose nodes stands for shapes and colours. The function of the palette is to facilitate colour recognition without employing central processes. I also describe two experiments by which the mental palette hypothesis can be tested. (shrink)

The quantization error in a fixed-size Self-Organizing Map (SOM) with unsupervised winner-take-all learning has previously been used successfully to detect, in minimal computation time, highly meaningful changes across images in medical time series and in time series of satellite images. Here, the functional properties of the quantization error in SOM are explored further to show that the metric is capable of reliably discriminating between the finest differences in local contrast intensities and contrast signs. While this capability of the QE (...) is akin to functional characteristics of a specific class of retinal ganglion cells (the so-called Y-cells) in the visual systems of the primate and the cat, the sensitivity of the QE surpasses the capacity limits of human visual detection. Here, the quantization error in the SOM is found to reliably signal changes in contrast or colour when contrast information is removed from or added to the image, but not when the amount and relative weight of contrast information is constant and only the local spatial position of contrast elements in the pattern changes. While the RGB Mean reflects coarser changes in colour or contrast well enough, the SOM-QE is shown to outperform the RGB Mean in the detection of single-pixel changes in images with up to five million pixels. This could have important implications in the context of unsupervised image learning and computational building block approaches to large sets of image data (big data). (shrink)

Early psychophysical methods as codified by Fechner motivate the development of quantitative theories of subjective experience. The basic insight is that just noticeable differences between experiences can serve as units for measuring a sensory domain. However, the methods described by Fechner tacitly assume that the experiences being investigated can be linearly ordered. This assumption is not true for all sensory domains; for example, there is no trivial linear order over all possible color sensations. This paper discusses key developments in the (...) history of psychophysical methods for measuring color experience. In particular, a clear distinction between topological and metrical structure allowed Helmholtz to use opponent colors as a standard for measuring the gross structure of color space. Once this gross structure had been determined, lines through color space could be defined and Fechner-style methods employed for determining local structure. Extensions of these methods due to Wright, MacAdam, and others provide detailed evidence for the degree of agreement in the qualities of color experience across individuals. This allows a precise statement of the evidential support for the claim that your experience of color and mine are the same. (shrink)

In sensory neuroscience, the neural and perceptual levels of investigation are commonly related through a reductive research strategy based in psycho-neural isomorphisms. Davida Teller’s “linking propositions” are a particularly vivid illustration of this epistemology in the context of vision science. For Teller, linking propositions guide the core epistemological practices of vision science by expressing the criteria for acceptable explanations of perceptual phenomena by neural processes and by articulating heuristics for discovering neural properties on grounds of perceptual ones, and vice versa. (...) Furthermore, linking propositions create a uniform discourse in which ontological identity statements can be formulated on the basis of structural terms applicable to both the neurophysiological and perceptual domains.I argue that the epistemic practices of current color vision science are better understood through Machamer-style mechanisms than isomorphism-based linking propositions. For Machamer, activity types of mechanisms are central for both explanation and the discovery of entities and their properties. The activity type of color cancellation is fundamental to the opponent process paradigm of color vision precisely in this manner. The descriptive inadequacy of linking propositions for clarifying vision scientific research is particularly damaging because activity types have a unifying role for the structural facts of color perception. As a form of local reductionism, Teller’s proffered epistemology aims to create a uniform domain for neuroscience and perceptual psychology but on the basis of a non-unified, disparate set of structural identity statements. By bringing attention to the unifying role of activity types, Machamer mechanisms allow also for critical epistemological explorations of ontological reductions on grounds of the fit between activity types of higher-level and lower-level sciences. They offer a Machamer-ontological-critical or MOCing framework, for short, against local reductionism. (shrink)

This article explores chemical skin bleaching practices in urban Ghana to demonstrate the ways that particular racialized understandings of meaning are deployed in a contemporary postcolonial African society. I argue that the processes of racialization indexed by skin bleaching in Ghana must be contextualized within global racial formations; specifically, they can only be understood by examining the interlinked local and global ideologies and practices of race. In elaborating this argument, the essay also engages with contemporary African diaspora theorization that (...) tends to foreground diasporic identity and experience at the expense of contemporary continental processes. By bringing a postcolonial African society into a dialogue about race, processes of racialization, and the interlinked transnational construction of black identities, this essay offers one way out of the ambivalent relationship that I believe diaspora theorization has with Africa. (shrink)

This article explores how structural failures in major federal environmental regulations —which set a foundation for environmental protections nationwide— have helped create many of the environmental injustices that people of color and low-income communities experience. It continues by examining how local governments have reinforced and compounded the failures in the federal environmental regulatory framework, particularly through local land use decisions. Although states play an important role in environmental policymaking, we propose that local governments are uniquely positioned to (...) utilize a health justice approach to address environmental health inequities. This approach centers partnerships between frontline communities and local governments to develop just solutions that fill gaps within the federal environmental regulatory system and anticipate and mitigate the compounding effects of environmental health inequities. (shrink)

Local differences in chromatin organisation may profoundly affect the activity of eukaryotic genomes. Regulation at the level of DNA packaging requires the targeting of structural proteins and histone‐modifying enzymes to specific sites and their stable or dynamic interaction with the nucleosomal fiber. The “chromodomain”, a domain shared by many regulators of chromatin structure, has long been suspected to serve as a module mediating chromatin interactions in a variety of different protein contexts. However, recent functional analyses of a number of (...) different chromodomains revealed an unexpected diversity of interaction targets, including histones, DNA and even RNA. The chromodomains of today seem to have evolved from a common ancestral fold to fulfill various functions in different molecular contexts. Combining information gained from recent functional and structural studies of chromodomains with a bioinformatic classification of their structure could lead to the definition of sequence motifs with predictive quality for chromodomain function. BioEssays 26:133–140, 2004. © 2004 Wiley Periodicals, Inc. (shrink)

The relationship of peasants and villagers with their animals in the premodern era is a missing chapter in the history of human-animal relations. Works on peasant culture ignore animals, and works on animals neglect their place in rural lives. This article, based on the depiction of premodern peasant and village life in hundreds of local-color novels and stories of the early nineteenth century, begins to fill in this gap in animal studies scholarship. It reveals that many of the defining (...) boundaries between humans and animals introduced in the ideologies of modernity are fuzzy, fluid, or indeed nonexistent in premodernity, where animals are seen as subjects, companions, and, often, parts of the family. (shrink)

Standard sorites paradoxes can always be put into a simple canonical form, employing the sole inference modus ponens. For example, consider the following paradox. Take a continuum of colours going from red to blue, and let a1,..., am be a sequence of segments of this continuum such that each segment is phenomenologically indistinguishable in colour from its immediate neighbours. Let Fx be the predicate ‘x is red’. Then the untrue conclusion Fam can be inferred from the premises Fa0 and (...) Fan → Fan + 1. (shrink)

In psychophysical experiments, the use of a psychophysical procedure of brightness/darkness cancellation shed light on interactions between spatial arrangement and figure–ground contrast in the perceptual filling in of achromatic and colored surfaces.Achromatic and chromatic Kanizsa squares with varying contrast, contrast polarity, and inducer spacingwere used to test how these factors interact in the perceptual filling in of surface brightness or darkness. The results suggest that the neuronal processing of surfaces with apparent contrast, leading to figure–ground segregation (i.e., perceptual organization), is (...) governed by mechanisms that integrate both luminance contrast and spatial information carried by the inducing stimuli, while discarding information on contrast polarity or color. The findings are discussed in relation to earlier observations on brightness assimilation and contrast. They support theories of nonantagonistic neural mechanisms suppressing local contrast or color signs in brightnessbased figure–ground percepts. Such mechanismsmight be necessary to cancel potentially conflicting polarities in geometricallycomplex visual stimuli so that perceptual filling in resulting in the most plausible representation of figure and ground can be achieved. (shrink)

The aim of this study was to test red - green dichromats' ability to discriminate between illuminant and surface-reflectance changes in natural scenes. Stimuli were simulations of natural scenes presented on a colour monitor with 10-bit resolution per gun. The natural scenes were obtained with a fast hyperspectral imaging system. Six different scenes (including rocks, foliage, and buildings) were tested. In each trial, two images were presented in sequence, each for 1 s, with no interval. The images differed in (...) the phase of daylight on the scene: first with correlated colour temperature 25 000 K, then 6 700 K. The spectral reflectance of a region in the second image was changed randomly, consistent with a local change in daylight. The observer's task was to decide whether a particular surface in the successive images was the same (pure illuminant change) or different (illuminant change with a surface-reflectance change). The performance of four deuteranopes and five protanopes varied considerably across the scenes tested, with mean colour constancy indices (± 1 SEM) of 0.48 (± 0.13) and 0.19 (± 0.10), respectively (1.0 representing ideal performance). Deuteranopes seemed less disadvantaged than protanopes, performing close to normal with some scenes. (shrink)

Increasing interest in farmers’ local soil knowledge and soil management practice as a way to promote sustainable agriculture and soil conservation needs a reliable means to connect to it. This study sought to examine if Visual Soil Assessment and farmer workshops were suitable means to engage, communicate and preserve farmers’ LSK in two mountainous communes of Central Vietnam. Twenty-four farmers with reasonable or comprehensive LSK from previously studied communes were selected for the efficacy of VSA and farmer workshops for (...) integrating LSK into a well-accepted soil assessment tool. In field sites chosen by the farmers, VSA was independently executed by both farmers and scientists at the same time. Close congruence of VSA scores between the two groups highlighted that farmers could competently undertake VSA. Farmers’ VSA score was compared with their perception of field’s soil quality. For the majority of farmers’ perception of soil quality was consistent to their VSA score, while the remainder perceived their soil quality was lower than their VSA score. For most farmers their assessment of soil quality using VSA valued their LSK, and the two measures were well aligned. Soil colour and presence or vulnerability to erosion were common soil characteristics mentioned by farmers and affected the final VSA score. Farmers’ participation in VSA and workshops strengthen farmers’ confidence in their LSK and provided guidance on the impact of their soil management on soil improvement and conservation. (shrink)

PurposeThis study investigated the impact of age and myopia on visual form perception among Chinese school-age children.MethodsThis cross-sectional study included 1,074 students with a mean age of 12.1 ± 4.7 years. The mean spherical equivalence refraction of the participants was −1.45 ± 2.07 D. All participants underwent distance visual acuity, refraction measurement and local and global visual form perception test including orientation, parallelism, collinearity, holes and color discrimination tasks.ResultsThe reaction times of emmetropes were slower than those of myopic and (...) high myopic groups on both local and global discrimination tasks. A reduction in reaction times was found with increasing age on both local and global discrimination tasks. Age was significantly associated with both local and global visual perception performance after adjusting for gender, visual acuity and SER.ConclusionsThis study revealed that both local and global visual perception improve with age among Chinese children and that myopes seem to have better visual perception than emmetropes. (shrink)

It has been argued that attention and awareness might oppose each other given that attending to an adapting stimulus weakens its afterimage. We argue instead that the type of attention guided by the spread of attention and the level of processing is critical and might result in differences in awareness using afterimages. Participants performed a central task with small, large, local or global letters and a blue square as an adapting stimulus in two experiments and indicated the onset and (...) offset of the afterimage. We found that increases in the spatial spread of attention resulted in the decrease of afterimage duration. In terms of levels of processing, global processing produced larger afterimage durations with stimuli controlled for spatial extent. The results suggest that focused or distributed attention produce different effects on awareness, possibly through their differential interactions with polarity dependent and independent processes involved in the formation of color afterimages. (shrink)

Historical dynamics around feminism, race, and rape discouraged extensive early Black involvement in anti-rape work in the United States. In Los Angeles, concern among women of color in the movement and a state initiative to fund poorly served areas converged to produce two new Black rape crisis centers in the mid-1980s. Ironically, state funding, an otherwise conservative influence on the anti-rape movement, has facilitated the progressive goal of expanding racial and ethnic diversity in the Los Angeles anti-rape movement. Racially homogeneous (...) organizations contributed more to diversifying the movement than integration within organizations. Despite differences in political perspective, women from older feminist groups and the new community-oriented centers now successfully work in coalition. (shrink)

Symmetry in biological and physical systems is a product of self-organization driven by evolutionary processes, or mechanical systems under constraints. Symmetry-based feature extraction or representation by neural networks may unravel the most informative contents in large image databases. Despite significant achievements of artificial intelligence in recognition and classification of regular patterns, the problem of uncertainty remains a major challenge in ambiguous data. In this study, we present an artificial neural network that detects symmetry uncertainty states in human observers. To this (...) end, we exploit a neural network metric in the output of a biologically inspired Self- Organizing Map Quantization Error (SOM-QE). Shape pairs with perfect geometry mirror symmetry but a non-homogenous appearance, caused by local variations in hue, saturation, or lightness within and/or across the shapes in a given pair produce, as shown here, a longer choice response time (RT) for “yes” responses relative to symmetry. These data are consistently mirrored by the variations in the SOM-QE from unsupervised neural network analysis of the same stimulus images. The neural network metric is thus capable of detecting and scaling human symmetry uncertainty in response to patterns. Such capacity is tightly linked to the metric’s proven selectivity to local contrast and color variations in large and highly complex image data. (shrink)

In this essay, I briefly review ten of the best bio flicks of artists. After laying out my criteria for assessing biographical films about artists, I review my ten choices. These films are: The Agony and the Ecstasy; Frida; Local Color; The Moon and Sixpence; Girl with the Pearl Earring; Pollock; Rembrandt; Moulin Rouge; Modigliani; and Lust for Life. For each film, I try to explain the ways in which the directors were able to show the artist’s creative processes (...) and personal challenges. (shrink)

It often appears that leading politicians in Belgium consider the results of the municipal elections in the light of national polities. They stick to the thesis that the municipal poll-results, at least in the bigger towns, are more and more influenced by the constellation of the nation's politics.Is it really so that the municipal elections indicate the hearings of the national political situation? Can one draw conclusions from the results of these elections as if they were national ones? And can (...) one,any how, compare municipal to parliamentary elections? By comparison of the results of municipal elections 1964 and of parliamentary elections 1965 it was checked which shifts in party-choice havehappened during this short period of eight months. If no oscillations, or only a few, were detected between both elections, one could conclude that the municipal elections 1964 indicated indeed the hearings of the parliamentary elections 1965.Successively, the national and provincial results of these elections were compared and the party-shifts on national and provincial level were calculated.To make a relevant comparison between the election-results on a lower level, a comparable basic unity had to be found. As there were no municipal data available at parliamentary elections on one side, andonly municipal results at the municipal elections on the other side, the least possible unity for which parliamentary election-results are known, the electoral canton namely, was chosen as a comparison-basis. For that purpose however the results per party had to be additioned in all municipalities belonging to one canton.Part of the electoral cantons was unfit for use as comparison-material for two reasons : the highly varied and often strongly local-coloured political party-structure on one hand, the big number of municipalitieswithout elections on the other hand. So we were bound to make a choice out of 212 electoral cantons. Finally the cantons with a maximum of 4 municipalities were chosen, which limited the number of cantons to 28. These cantons were classified by degree of urbanisation according to the typology of W. Van Waelvelde and H. Van der Haegen.In that classification the percentages of votes in favour of the political parties, at the occasion of these elections, were tabulated and compared.The participating parties and lists were grouped as much as possible around the traditional parties to which they were most related. So we distinguish in Flanders : CVP, BSP, PVV, VU, CPB and other parties ;in the Walloon region: PSC, PSB, PLP PCB, French-speaking lists and other parties.For this analysis we also thought it was relevant to control separately the shifts of the electoral corps in the Flemish, the Walloon and the Brussels cantons. These shifts were then specified according to thedegree of urbanisation.To measure the size of the party-shifts for these elections, the external election-shift standard was calculated for the chosen Flemish, Walloon and Brussels cantons, with a special attention for the degree of urbanisation. Finally we examined which attitude was assumed by the government, the governmental and the opposition parties, in relation to the results of the municipal 1964 elections.It appeared that some notable party-shifts had been realized during the short period between the municipal elections of 1964 and the legislative elections of 1965. In general, a certain polarization has taken place due to a centrifugal vote-shift to the left and still more to the right. The direction of vote-shifts, which had shown at the municipal elections of 1964, was affirmed at the legislative elections of 1965 and for some parties, CVP and PVV namely, it was even accentuated. The parallelism between both elections in relation to the direction of the vote-shifts did not mean however that the size of these shifts was the same everywhere. The image of the shifts was different according to linguistic region and degree of urbanisation.The analysis of the urbanisation-degree showed that the level of oscillations grew higher as the urbanisation-degree grew lower. Seen per linguistic region, the largest shifts had taken place in the Walloon cantons. According to the calculations of the electoral shift standards during the period 1964-1965, the lowest oscillations were noted in the Flemish and Brussels cantons, i.e. the voting-behaviour of the big agglomerations during the municipal elections of 1964 were the closest to the national electoral pattern. Seen that way they were, up to a certain degree, a value-measure for the general policy.Finally the remark should be made that the limitation to the two above-mentioned elections does not allow any generalization of the obtained conclusions. The short period between those elections was itself an exceptional situation which may have been of influence on the results of the comparisons. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:“It’s not true, but I believe it”: Discussions on jettatura in Naples between the End of the Eighteenth and Beginning of the Nineteenth CenturiesFrancesco Paolo de CegliaIntroduction: What is Jettatura?Non èvero...ma ci credo (“It’s not true... but I believe it”) is the title of a comedy by the Italian actor and playwright, Peppino De Filippo, younger brother of the more famous Eduardo, which was staged for the first time (...) in 1942. The narrated events take place in the twentieth century and concern Gervasio Savastano, a Neapolitan businessman who is tormented by the fear of jettatura. The character, victim of grotesque events, first sacks a worker, believing him to be a jettatore, and then hires another, who is a hunchback and so should bring him good luck. In the end, however, it is discovered that the presumed jettatore has never harmed anyone and that the hunchback is not what he seems: he has stuffed his jacket in order to enter into the good graces of the gullible businessman and marry his daughter, with whom he has planned a con trick. The “lucky” events ascribed to his presence can therefore be considered casual. The epilogue? In keeping with the logic of compromise, typical of the brothers De Filippo’s theater, even though the character is rationally convinced of the unfounded nature of his beliefs, he remains adamant: “It’s not true, but I believe it” in other words.1 [End Page 75]“Where I come from, jettatura rules,” wrote the journalist and scriptwriter Giuseppe Marotta in 1947. Indeed, it is still a part of popular Neapolitan culture today.2 Often confused with similar beliefs, such as fascination (fascino) and the evil eye (malocchio), jettatura assumed its present form between the end of the eighteenth and beginning of the nineteenth century, at a time when a polite debate on its nature was taking shape in the city. In this period, the epistemological pluralism animating the discussions was translated into a variety of interpretative hypotheses and literary genres, in which grotesque atmospheres and spirited quips also found room, all perfectly in line with what could be considered the Weltanschauung of Savastano. It is the purpose of this article to examine these discussions, which even spread the term abroad and, with it, the “local color” of the concept.Nineteenth-century European writers on jettatura knew the Neapolitan authors well, and either quoted them explicitly or associated them with characters whose names were a deformation of real people’s: for example, Volitta for Valletta (Stendhal), don Jo (Stendhal) or Ojori (Dumas) for De Jorio. They explained that jettatura corresponded to the more familiar evil eye, but they left the term in Italian, as if to underline the fact that it was untranslatable.Is jettatura a mere anthropological issue, linked to a “primitive” culture, in the face of which official science would remain refractory? A belief that could not be exported or shared by those educated in more “highly developed” contexts? Well, in part, yes. Nevertheless, in the 1840s there was a visitor to Naples who expressed himself in the following terms: “When a foreigner arrives in Naples, at first he laughs at jettatura, then, little by little, he becomes troubled by it, and finally, after a stay of three months, you will see him covered in horns and with his right hand forever clenched [to ward off evil].”3 [End Page 76]So wrote the novelist Alexandre Dumas, père, one of the many travellers who, after having completed the Grand Tour of southern Italy, decided to describe its picturesque scenes and backward customs.4 Creating a veritable topos of travel literature, in the same period the philologist Karl August Mayer commented, “often foreigners let themselves be influenced” by local “superstitions.”5 Indeed many of them were captivated by these Neapolitan beliefs, despite their desire to remain objective and detached; and so they were “converted,” and driven to seek scientific explanations, often after meeting “a Real Jettatore,” whose image had nothing in common with the exotic fantasies of “a French Novelist’s Idea of Jettatore.”6Actually, Dumas and Mayer probably exaggerated somewhat in order to make their descriptions more... (shrink)

Every perceptual experience has an objective and a subjective side. We see object size, independent of distance, but we also see that distant objects project smaller images. Early modern conceptions focused on local stimulation and thus on the subjective aspect. Helmholtz and Hering emphasized the objective aspect. Helmholtz split visual experience into two stages, with sensation representing the subjective side and perception, through cognitive processes, the objective side. Gestalt theory denied this dualism, rejecting both sensory and cognitive stages. Despite (...) contrary evidence, the sensation/perception dualism persists, in brightness models and past experience theories. That we can detect visual angle and luminance does not mean that these are raw sensations out of which perception of size and lightness is built. Size and color constancy are truly visual, not cognitive. Instructions to subjects in vision experiments must avoid the proximal mode on the one hand and cognitive judgments on the other. (shrink)

In this paper, I defend a representationalist account of the phenomenal character of color experiences. Representationalism, the thesis that phenomenal character supervenes on a certain kind of representational content, so-called phenomenal content, has been developed primarily in two different ways, as Russellian and Fregean representationalism. While the proponents of Russellian and Fregean representationalism differ with respect to what they take the contents of color experiences to be, they typically agree that colors are exhaustively characterized by the three dimensions of the (...) color solid: hue, saturation, and lightness. I argue that a viable version of representationalism needs to renounce this restriction to three dimensions and consider illumination to be a genuine phenomenal dimension of color. My argument for this thesis falls into two parts. I first consider the phenomenon of color constancy in order to show that neither Russellian nor Fregean representationalism can do justice to the phenomenal significance of local illumination. I subsequently formulate a version of representationalism that accounts for illumination by taking it as a phenomenal dimension of color. (shrink)

A compact, full-color companion guide to photographing San Francisco! Whether using a full-featured compact camera or a high-end dSLR, this companion guide provides you with detailed information for taking stunning shots of beautiful San Francisco. Whether you aim to capture breathtaking photos of the majestic Golden Gate Bridge, crooked Lombard Street, infamous Alcatraz, or unique Victorian homes, this portable resource goes where you go and walks you through valuable tips and techniques for taking the best shot possible. You'll discover suggested (...) locations for taking photos, recommended equipment, what camera settings to use, best times of day to photograph specific attractions, how to handle weather challenges, and more. In addition, lovely images of San Francisco's most breathtaking attractions and recognizable landmarks serve to both inspire and assist you as you embark on an amazing photographic adventure! Elevates your photography skills to a new level with photography secrets from professional photographer Bruce Sawle Presents clear, understandable tips and techniques that span all skill levels, using all types of digital cameras, from compacts to high end DSLRs Features San Fransisco's main attractions in alphabetical order as well as thumb tabs on the pages so you can quickly and easily access the information you are looking for Shares detailed information and insight on critical topics, such as ideal locations to photograph from, the best time of day to shoot, camera equipment to have handy, weather conditions, and optimal camera settings to consider Whether you're a local familiar with the territory or a visitor seeing San Francisco for the first time, this handy guide will help you capture fantastic photos! (shrink)

A full-color guide to taking stunning wedding photos from "America's Most Popular Photo Expert" —Rick Sammon Wedding photography has grown into a major industry with droves of digital photographers in the field, all looking for a competitive edge. Whether you're new to the field or you're looking for some fresh new ideas, this full-color guide is packed with more than 200 tips, tricks, and secrets for taking stunning and memorable digital wedding photos. Top photographer and Canon Explorer of Light Rick (...) Sammon explores the wedding photography market from the angles of both novice and experienced digital photographers and offers guidance for choosing and using digital camera equipment, accessories, software, and printing options. "America's Most Popular Photo Expert" Rick Sammon shows you how to set up the scene for an incredible wedding shot—both posed and candid Shows how to prepare for a variety of conditions in all types of settings, including exotic locales Demonstrates best practices for post-shoot digital darkroom workflow Explains how to manipulate photos to include impressive effects Brimming with lavish inspirational color photos, this is the must-have book if you're looking to bring a unique style to your wedding photography skills. (shrink)

Action is a means of acquiring perceptual information about the environment. Turning around, for example, alters your spatial relations to surrounding objects and, hence, which of their properties you visually perceive. Moving your hand over an object’s surface enables you to feel its shape, temperature, and texture. Sniffing and walking around a room enables you to track down the source of an unpleasant smell. Active or passive movements of the body can also generate useful sources of perceptual information (Gibson 1966, (...) 1979). The pattern of optic flow in the retinal image produced by forward locomotion, for example, contains information about the direction in which you are heading, while motion parallax is a “cue” used by the visual system to estimate the relative distances of objects in your field of view. In these uncontroversial ways and others, perception is instrumentally dependent on action. According to an explanatory framework that Susan Hurley (1998) dubs the “Input-Output Picture”, the dependence of perception on action is purely instrumental: "Movement can alter sensory inputs and so result in different perceptions… changes in output are merely a means to changes in input, on which perception depends directly" (1998: 342). -/- The action-based theories of perception, reviewed in this entry, challenge the Input-Output Picture. They maintain that perception can also depend in a noninstrumental or constitutive way on action (or, more generally, on capacities for object-directed motor control). This position has taken many different forms in the history of philosophy and psychology. Most action-based theories of perception in the last 300 years, however, have looked to action in order to explain how vision, in particular, acquires either all or some of its spatial representational content. Accordingly, these are the theories on which we shall focus here. -/- We begin in Section 1 by discussing George Berkeley’s Towards a New Theory of Vision (1709), the historical locus classicus of action-based theories of perception, and one of the most influential texts on vision ever written. Berkeley argues that the basic or “proper” deliverance of vision is not an arrangement of voluminous objects in three-dimensional space, but rather a two-dimensional manifold of light and color. We then turn to a discussion of Lotze, Helmholtz, and the local sign doctrine. The “local signs” were felt cues for the mind to know what sort of spatial content to imbue visual experience with. For Lotze, these cues were “inflowing” kinaesthetic feelings that result from actually moving the eyes, while, for Helmholtz, they were “outflowing” motor commands sent to move the eyes. -/- In Section 2, we discuss sensorimotor contingency theories, which became prominent in the 20thcentury. These views maintain that an ability to predict the sensory consequences of self-initiated actions is necessary for perception. Among the motivations for this family of theories is the problem of visual direction constancy—why do objects appear to be stationary even though the locations on the retina to which they reflect light change with every eye movement?—as well as experiments on adaptation to optical rearrangement devices (ORDs) and sensory substitution. -/- Section 3 examines two other important 20th century theories. According to what we shall call the motor component theory, efference copies generated in the oculomotor system and/or proprioceptive feedback from eye-movements are used together with incoming sensory inputs to determine the spatial attributes of perceived objects. Efferent readiness theories, by contrast, look to the particular ways in which perceptual states prepare the observer to move and act in relation to the environment. The modest readiness theory, as we shall call it, claims that the way an object’s spatial attributes are represented in visual experience can be modulated by one or another form of covert action planning. The bold readiness theory argues for the stronger claim that perception just is covert readiness for action. -/- In Section 4, we move to the disposition theory, most influentially articulated by Gareth Evans (1982, 1985), but more recently defended by Rick Grush (2000, 2007). Evans’ theory is, at its core, very similar to the bold efferent readiness theory. There are some notable differences, though. Evans’ account is more finely articulated in some philosophical respects. It also does not posit a reduction of perception to behavioral dispositions, but rather posits that certain complicated relations between perceptual input and behavioral provide spatial content. Grush proposes a very specific theory that is like Evans’ in that it does not posit a reduction, but unlike Evans’ view, does not put behavioral dispositions and sensory input on an undifferentiated footing. (shrink)

Computational neuroscience attributes coloured areas and other perceptual qualia to calculations that are realizable in multiple cellular forms. This faces serious issues in explaining how the various qualia arise and how they bind to form overall perceptions. Qualia may instead be neuroelectrical. Growing evidence indicates that perceptions correlate with neuroelectrical activity spotted by locally activated EEGs, the different qualia correlate with the different electrochemistries of unique detector cells, a unified neural-electromagnetic field binds this activity to form overall perceptions, and this (...) field interacts with sensory circuits to help attentively guide perception. The coloured areas in images may thus be seated in the electrochemistry of unique cells, while constancy mechanisms and other multiply realizable computations just help refine these images behind the scenes. This theory is ultimately testable. (shrink)

Pelagia Goulimari interviews Talia Bettcher on core issues and concepts in Women Writing Across Culture, both in relation to Bettcher’s work and in the context of wider debates in feminist, queer and transgender theory. How to theorize “woman,” “trans woman,” “trans woman of colour,” “trans feminism”? How to put together experience, local knowledge, and communication across worlds? How to amplify experiments crossing the boundaries between theory, literature and life-writing? How to pursue an intersectional ethics of intimacy and “interpersonal (...) spatiality”? (shrink)

A striking visual essay captures the institutional landmarks of Chicago in a collection of full-color photographs of local schools, jails, and other landmarks of public life, including works by such renowned architects as Rem Koolhaas, Helmut Jahn, and Mies van der Rohe.

In 1853, two decades after Goethe’s death, Hermann von Helmholtz, who had just become professor of anatomy at Königsberg, delivered an evaluation of the poet=s contributions to science.1 The young Helmholtz lamented Goethe=s stubborn rejection of Newton =s prism experiments. Goethe=s theory of light and color simply broke on the rocks of his poetic genius. The tragedy, though, was not repeated in biological science. In Helmholtz=s estimation, Goethe had advanced in this area two singular and “uncommonly fruitful” ideas.2 The poet (...) recognized, first, that the anatomical structures of various kinds of animals revealed a unity type underlying the superficial differences arising from variability of food, habit, and locality. His second lasting achievement was the related theory of the metamorphosis of organisms: the thesis that the various articulations within an organism developed out of a more basic kind of structure—that, for instance, the different parts of plants were metamorphosed leaves or that the various bones of the animal skull were but transformed vertebrae. These two general morphological conceptions, according to Helmholtz, grounded the biology flourishing at 1 mid-century. Goethe came to these ideas, Helmholtz shrewdly maintained, as the result of a poetically intuitive conception.3 He described, for instance, Goethe=s immediate recognition, while playfully tossing around a sheep=s skull on the Lido in Venice, that the fused bones of the battered cranium consisted of transmuted vertebrae. This experience resulted in the poet=s vertebral theory of the skull, which became a standard conception in later morphology.4 Poetic intuition thus liberated an idea initially embedded in matter and made it available to the analytic understanding of the scientist. Forty years later, in 1892, at the meeting of the Goethe Society in Weimar, Helmholtz returned to reexamine the poet=s scientific accomplishments, and, it would seem, implicitly his own; for by the end of his career, Helmholtz himself had achieved a position in German culture only a few steps below that of Goethe.5 His evaluation of Goethe=s achievements in physical science was now more complex than his earlier assessment had been. (shrink)

It is worthwhile to search for forms of coding, processing, and learning common to various cortical regions and cognitive functions. Local cortical processors may coordinate their activity by maximizing the transmission of information coherently related to the context in which it occurs, thus forming synchronized population codes. This coordination involves contextual field (CF) connections that link processors within and between cortical regions. The effects of CF connections are distinguished from those mediating receptive field (RF) input; it is shown how (...) CFs can guide both learning and processing without becoming confused with the transmission of RF information. Simulations explore the capabilities of networks built from local processors with both RF and CF connections. Physiological evidence for synchronization, CFs, and plasticity of the RF and CF connections is described. Coordination via CFs is related to perceptual grouping, the effects of context on contrast sensitivity, amblyopia, implicit influences of color in achromotopsia, object and word perception, and the discovery of distal environmental variables and their interactions through self-organization. Cortical computation could thus involve the flexible evaluation of relations between input signals by locally specialized but adaptive processors whose activity is dynamically associated and coordinated within and between regions through specialized contextual connections. Key Words: cell assemblies; cerebral cortex; context; coordination; dynamic binding; epistemology; functional specialization; learning; neural coding; neural computation; neuropsychology; object recognition; perception; reading; self-organization; synaptic plasticity; synchronization. (shrink)

Capture unforgettable moments of that special day Professional wedding photographer Glen Johnson knows there's a huge difference between being able to take good pictures and being a good wedding photographer. In this exquisite, full-color book, Glen dispenses sage advice and solutions for taking impressive digital wedding images -- posed or candid, in any weather, in any setting, at any locale. You will also learn the secrets of creating a successful digital wedding photography business, and much more. Whether you're an aspiring (...) professional or an amateur who wants to improve your skills at digital wedding photography, this book will help you succeed. Discover what makes wedding photography a unique specialty * Find out how to make people feel relaxed and comfortable while you're shooting * Explore ways to capture the emotion as well as the moment * Understand different photographic styles and adapt to your client's wishes * Prepare for all types of lighting situations * Learn appropriate etiquette for shooting in dressing rooms and during the ceremony * Know what to take when traveling abroad * Set up the perfect digital studio to process your images * Find out how to price your work realistically * See why your business skills may be more important than your photographic talent Beautifully illustrated with full-color photographs, each showingthe camera settings and other details used to create the image. (shrink)

Although the concept of food sovereignty is rooted in International Peasant Movements across the global south, activists have recently called for the adoption of this framework among low-income communities of color in the urban United States. This paper investigates on-the-ground processes through which food sovereignty articulates with the work of food justice and community food security activists in Oakland, California, and Seattle, Washington. In Oakland, we analyze a farmers market that seeks to connect black farmers to low-income consumers. In Seattle, (...) we attend to the experiences of displaced immigrant farmers from Latin America and their efforts to address their food needs following migration. In both cases, we find that US based projects were constrained by broader forces of neoliberalism that remained unrecognized by local activists. In Oakland, despite a desire to create a local food system led by marginalized African Americans, emphasis on providing green jobs in agriculture led activists to take a market-based approach that kept local food out of the economic grasp of food-insecure neighborhood residents. In Seattle, the marginalization of the immense agroecological knowledge of Latino/an immigrant farmers rendered local food projects less inclusive and capable of transformative change. Taken together, these very different cases suggest that a shift towards food sovereignty necessitates a broad acknowledgement of and resistance to neoliberalism. (shrink)

Humans are poorer at identifying smells and communicating about them, compared to other sensory domains. They also cannot easily organize odor sensations in a general conceptual space, where geometric distance could represent how similar or different all odors are. These two generalities are more or less accepted by psychologists, and they are often seen as connected: If there is no conceptual space for odors, then olfactory identification should indeed be poor. We propose here an important revision to this conclusion: We (...) believe that the claim that there is no odor space is true only if by odor space, one means a conceptual space representing all possible odor sensations, in the paradigmatic sense used for instance for color. However, in a less paradigmatic sense, local conceptual spaces representing a given subset of odors do exist. Thus the absence of a global odor space does not warrant the conclusion that there is no olfactory conceptual map at all. Here we show how a localist account provides a new interpretation of experts and cross‐cultural categorization studies: Rather than being exceptions to the poor olfactory identification and communication usually seen elsewhere, experts and cross‐cultural categorization are here taken to corroborate the existence of local conceptual spaces. (shrink)

In this article we present a new experimental paradigm: comparative visual search. Each half of a display contains simple geometrical objects of three different colors and forms. The two display halves are identical except for one object mismatched in either color or form. The subject's task is to find this mismatch. We illustrate the potential of this paradigm for investigating the underlying complex processes of perception and cognition by means of an eye‐tracking study. Three possible search strategies are outlined, discussed, (...) and reexamined on the basis of experimental results. Each strategy is characterized by the way it partitions the field of objects into “chunks.” These strategies are: (i) Stimulus‐wise scanning with minimization of total scan path length (a “traveling salesman” strategy), (ii) scanning of the objects in fixed‐size areas (a “searchlight” strategy), and (iii) scanning of object sets based on variably sized clusters defined by object density and heterogeneity (a “clustering” strategy). To elucidate the processes underlying comparative visual search, we introduce besides object density a new entropy‐based measure for object heterogeneity. The effects of local density and entropy on several basic and derived eye‐movement variables clearly rule out the traveling salesman strategy, but are most compatible with the clustering strategy. (shrink)

Reid maintained that the perceptions that we obtain from the senses of smell, taste, hearing, and touch are ‘suggested’ by corresponding sensations. However, he made an exception for the sense of vision. According to Reid, our perceptions of the real figure, position, and magnitude of bodies are suggested by their visible appearances, which are not sensations but objects of perception in their own right. These visible appearances have figure, position, and magnitude, as well as ‘colour,’ and the standard view (...) among Reid scholars has been that Reid maintained that our perceptions of visible figure, position, and magnitude are also not suggested by any sensation. They are instead suggested by the material impression on the retina. Gideon Yaffe challenges the standard interpretation. According to Yaffe, Reid believed that our perceptions of visible figure are suggested by corresponding sensations, by sensations of colour. We defend the standard interpretation of Reid. According to Reid, there is no “local sign” in our sensations of colour. The same colour sensation can be associated with different positions on the visual field, and different colour sensations can be associated to the same position on the visual field. According to Reid, we only have evidence for a correlation between the image on the retina and the perception of visible figure. (shrink)

It is a familiar experience to perceive a material object as maintaining a stable shape even though it projects differently shaped images on our retina as we move with respect to it, or as maintaining a stable color throughout changes in the way the object is illuminated. We also perceive sounds as maintaining constant timbre and loudness when the context and the spatial relations between us and the sound source change over time. But where does this perceptual invariance ‘come from’? (...) What is it about our perceptual systems that makes them able to ‘transform’ incoming unstable and fluctuating sensory inputs into generally stable and coherent conscious experiences? And what exactly do we experience as invariant in cases like those described above? There are two main approaches to the Problem of Perceptual Invariance: the Local-Inferential approach and the Global-Structural approach. Although both approaches include an account of the sub-personal perceptual mechanisms ‘stabilizing’ variant and invariant components in incoming sensory stimulation and a proposal regarding the phenomenology of perceptual invariance, in this paper I argue that the latter provides a better solution to the problem overall. (shrink)

Artificial Intelligence (AI) is increasingly being used in disaster risk management applications to predict the effect of upcoming disasters, plan for mitigation strategies, and determine who needs how much aid after a disaster strikes. The media is filled with unintended ethical concerns of AI algorithms, such as image recognition algorithms not recognizing persons of color or racist algorithmic predictions of whether offenders will recidivate. We know such unintended ethical consequences must play a role in DRM as well, yet there is (...) surprisingly little research on exactly what the unintended consequences are and what we can do to mitigate them. The aim of this perspective is to call researchers working on fairness, accountability, and transparency to work with DRM and local experts—so we can ensure that disaster mitigation and relief is accountable, considers local values, and is not unintentionally biased. (shrink)