Color Vision and Frithiof Holmgren's Discordant Retinal Microstimulation Findings

Frithiof Holmgren was a nineteenth-century Swedish professor of physiology who, after a sabbatical year at Helmholtz's laboratory in Heidelberg, devoted himself to studies of color vision and color blindness. Following Blix's successful demonstration of cutaneous receptor specificity by means of point stimulation, he decided to apply an analogous technique for psychophysical examination of the human retina. His findings appeared to support the Young-Helmholtz hypothesis of three primary colors and invalidated Hering's alternative four color opponent hypothesis. However, contemporaries (Hering, Isaachsen) could not reproduce Holmgren's results, and his findings fell into disrepute. They have now been confirmed, but their previous theoretical significance was not supported.     

Wissenschaftliche Photographie als visuelle Kultur. Die Erforschung und Dokumentation von Spektren

This paper discusses facets of 19th‐century scientific photography as a visual culture. The example of spectral research and documentation is particularly well suited, because prismatically diffracted light from the sun or from luminous gases was one of the most frequently examined phenomena of that century. The results were significant not only for physics but also for analytical chemistry and astrophysics. The spectrum also served as an ideal test object for checking the effectiveness of a wide array of photochemically sensitizable surfaces to the various color regions. Scientific photography became the most important experimental technique in the infrared and ultraviolet. H. A. Rowland's spectrum charts are discussed as an example of the transition from comprehensiveness in documentation to fetishism. The discussion of the Lippmann process, one of the first methods of color photography, addresses the associated training of the eye. Issues of authenticity and the much averred ?mechanical objectivity”? are raised with regard to retouching. The overriding theme of visual science cultures leads furthermore to unanticipated interdependencies with other scientific fields, such as geography, and draws the importance of practitioners into the foreground.     

Color Me Heated? A Comparison of Potential Methods to Quantify Color Change in Thermally-Altered Rocks

This study investigates and compares methods to quantify color changes in quartzite rocks after repeated heating episodes. We collected quartzite samples from the southern Cape coast, South Africa, and heated them three times in experimental fires. We recorded the colors of the samples before and after heating using visual observation, Munsell color notations, Munsell color notations converted to RGB values, and digital image analysis. The methods are also tested on potentially heated and potentially unheated archaeological samples from Klasies River main site, South Africa. It was possible to distinguish between unheated and repeatedly experimentally heated quartzite using visual observation and Munsell color notation, but a large proportion of repeatedly heated samples appeared unaffected by the heat. The digitally-captured color values best discriminated color changes after heating. Color values of repeatedly heated experimental samples overlap with color values of potentially heated archaeological samples.     

Pioneers of Affective Neuroscience and Early Concepts of the Emotional Brain

Views on the representation of emotion in the brain, as formulated about a century ago, are described, with a focus on the Vienna physiologist and psychologist Sigmund Exner, the psychoanalyst Sigmund Freud, and the French physician Israel Waynbaum. All three can be characterized as forerunners in the field of “affective neuroscience”. By the turn of the century, they had developed a neural network theory of emotion which included a stage of pre-cortical processing. In spite of their otherwise very diverse theoretical backgrounds, their concepts of parallel processing routes were highly similar. It is interesting to note that their ideas were on line with present-day views on the neural substrates and physiological characteristics of emotional processing, although none of the three scientists could rely on the refined anatomical knowledge available nowadays.     

The disparate histories of binocular vision and binaural hearing

Vision and hearing are dependent on disparities of spatial patterns received by two eyes and on time and intensity differences to two ears. However, the experiences of a single world have masked attention to these disparities. While eyes and ears are paired, there has not been parity in the attention directed to their functioning. Phenomena involving binocular vision were commented upon since antiquity whereas those about binaural hearing are much more recent. This history is compared with respect to the experimental manipulations of dichoptic and dichotic stimuli and the instruments used to stimulate the paired organs. Binocular color mixing led to studies of binaural hearing and direction and distance in visual localization were analyzed before those for auditory localization. Experimental investigations began in the nineteenth century with the invention of instruments like the stereoscope and pseudoscope, soon to be followed by their binaural equivalents, the stethophone and pseudophone.     

The singular vision of William Charles Wells (1757-1817)

William Charles Wells retained an interest in vision throughout his life. His first book was on single vision with two eyes; he integrated vision and eye movements to determine principles of visual direction. On the basis of experiments and observations he formulated three principles of visual direction, which can readily be demonstrated. In the course of these studies, he also examined visual acuity, accommodation and convergence, visual persistence, and visual vertigo. Insights into visual processing were mainly derived from observations of afterimages that were used to provide an index of how the eyes moved. His experiments enabled him to distinguish between the consequences of active and passive eye movements (later called outflow and inflow) as well as describing nystagmus following body rotation. After providing a brief account of Wells's life, his neglected research on vision is described and assessed.     

基于融合光谱分析的墓葬壁画颜料色彩虚拟修复方法研究北大核心

墓葬壁画是一种重要的彩绘文物,对其进行揭取搬迁并加固修复是目前主要的保护方式。而在揭取搬迁时,对壁画绘画内容和颜料进行数字化记录及特性分析,是后续壁画表层合理修复的重要依据。光谱成像技术作为一种属性与视觉同步感知的信息探测手段,可以用于壁画表面颜料层的高维信息记录与材质属性分析;同时,利用高光谱伪彩色显示技术可以实现颜料色彩的虚拟复原。基于此,提出一种基于融合光谱分析与带通能量积分的壁画颜料色彩虚拟修复方法,并利用采集的颜料光谱数据、壁画高光谱成像数据与模拟真实场景下的混合颜料光谱数据进行壁画颜料识别与色彩虚拟复原实验。实验结果表明,对于选取的唐墓壁画上的红、黄、蓝、绿四种颜料,其融合光谱识别结果是:武惠妃墓的红色颜料为朱砂/银珠、韩休墓的黄色颜料为石黄/雌黄、武惠妃墓的蓝色颜料为石青/青金石、韩休墓的绿色颜料为石绿的匹配度最大;同时,基于上述识别结果,得到了纯色复原和壁画基底绘制复原的壁画颜料色彩虚拟复原结果,可以为壁画实体修复提供颜料层视觉修复的参考依据。上述研究成果在壁画保护及活化利用领域具有重要的创新示范意义。     

Railway development as Symbolising ideas of social construction: (With Special Reference to Railway Development in Australia)

The townscape of “old” Lerwick reflects its traditional focus on the sea for its economic base. The major elements in this cohesive visual character are the closely clustered houses in the steep hillside district of the Lanes, the narrow, winding principal commercial street, and the lodberries projecting out into the harbour. The latter were constructed to meet the needs of the prosperous expanding trade period of the latter half of the 18th century and first half of the 19th century. Harbour improvements in the final quarter‐century of the 1800s ended their commercial usefulness. After a century of declining use and of neglect they are being restored as part of the renewal of “old town” Lerwick.     

The Little Revolution in New South Wales, 1808

In this article, ‘Development’ and developmentist ideas, two increasingly fashionable areas of historical inquiry, are explored in the context of relations between the United States and Brazil through the middle decades of the twentieth century, with three arguments made along the way. First, and in contrast to much academic and extra-academic received wisdom (as well as the official pronouncements of US diplomats), the United States government offered no singular or consistent approach to ‘development’ in its dealings with Brazil. Second, an unofficial vision of development (here termed ‘market developmentalism’) that has so far eluded the attention of historians of developmentalist ideas emerged earlier than the official developmentalisms that have been the main object of historiographic interest to date. Third, this unofficial, largely private, consumption-oriented developmentalism is shown to have enjoyed an outsized influence in Brazil, dwarfing the influence enjoyed by those inconsistent varieties of developmentalism espoused by US diplomats between the 1940s and the 1960s.     

Working-Class Women and Republicanism in the French Revolution of 1848

Abstract

Following the February Revolution in 1848, working-class women as well as men attempted to hold the government to its promise of the right to work, through street demonstrations, individual and collective demands for work, and participation in the national workshops that had been established in an attempt to address the problem of unemployment in the capital. In the process, these activists articulated what scholars have labelled as a democratic socialist vision of republicanism. In June of 1848, women participated in the insurrection that sought to defend the vision of a social republic. While the republicanism of working-class men and bourgeois women such as George Sand has been examined, studies of working-class women in the first half of the nineteenth century have to this point focused on the romantic socialist influences that shaped their activities, in particular the Saint-Simonian movement. Drawing primarily on individual letters, police interrogations and newspaper reports, a vision of republicanism emerges that includes the ability for women to sustain their families through waged as well as household labour. This concept of republican virtue based itself not in suffrage but in women's capacity to act as both producers and consumers under just and equitable conditions.     

基于丰度反演及光谱变换的书画霉斑虚拟修复

古书画在保存过程中容易滋生霉斑病害，霉斑不仅影响书画的外观，还会对纸质文物造成不可逆转的永久性破坏。为了给霉斑清洗提供直观参考，提出基于丰度反演及光谱变换的书画霉斑提取与虚拟修复方法。选取与霉斑区域光谱曲线存在明显差异的450～600 nm之间244个波段作为特征波段，通过连续最大角凸锥端元提取与灰度分割，提取霉斑区域。再对高光谱影像进行主成分变换，选取包含信息量最大的前三主成分合成影像，利用Criminisi算法对霉斑区域进行修复，再将修复后的影像进行主成分逆变换，完成高光谱影像的虚拟修复。以中国近现代画家倪田的《捕鱼图》为例进行了研究，发现修复后的霉斑区域与画体融入性较好，边界自然平滑，均方根误差值普遍变小。研究结果可为书画霉斑清洗提供直观的修复依据，具有较强的实用性。     

Regionalism and Nationalism in the Railway Cartography of Mid-Nineteenth Century Germany

This article concerns German railway cartography in the mid-nineteenth century and its effects on spatio-political perceptions. The evolution of a railway system in Germany, from isolated single routes into national and ultimately international networks, has been customarily linked to the political issue of unification in 1871. The infrastructural changes triggered the introduction of new maps and map signs, which overshadowed other national and political signs and should not be seen as a simple means to a nationalist end. By examining the developing iconography of railways and railway networks, I argue that railways were a cause of deterritorialization for regions and states and for the vision of a unified Germany.     

Assessment of the Lines of Torres Vedras defensive system with visibility analysis

A method to assess the coherence of defensive systems based on the individual and combined visual coverage of fortifications is presented. The case study is the complex fortification system of Lines of Torres Vedras, around Lisbon, Portugal, activated in the first decade of the 19th century to halt the French armies of Napoleon in the Peninsular War. As messages between fortifications are known to have been exchanged visually by semaphore, GIS-based viewshed calculations enabled the assessment of the system's coherence and the exploration of how the undocumented communication with the defensive forces' headquarters in Lisbon might have been achieved. Results show that the defensive system with its two lines was highly effective per se with respect to the visual coverage of the terrain and the exchange of messages between fortifications, but it could have been improved with minor changes to the location of communication devices. It is also found that communication with the headquarters in Lisbon was not adequate, suggesting that additional devices were needed.     

Australia's embrace of investor state dispute settlement: a challenge to the social contract ideal?

This paper explores the origins of investor-state dispute settlement (ISDS) treaties and their implications for the Australian social contract. This analysis includes how and why ISDS emerged in NAFTA, was rebuffed with the failure of the Multilateral Agreement on Investment (MAI), and became incorporated into most subsequent bilateral US trade and investment agreements. The paper considers Australia's exposure to ISDS—first through using it in bilateral investment agreements in nations with inadequate governance mechanisms to support the rule of law, then turning against it when a multinational tobacco company tried to use the mechanism to overturn scientifically endorsed, democratically approved and constitutionally validated tobacco plain packaging measures. The paper concludes by exploring the hypothesis that an alternative governance vision can be achieved in which the system of investment arbitration and trade law is made coherent with presumptively more democratically legitimate normative systems such as constitutional and international law.     

Vision and visualization

The art of visual communication is not restricted to the fine arts. Scientists also apply art in communicating their ideas graphically. Diagrams of anatomical structures, like the eye and visual pathways, and figures displaying specific visual phenomena have assisted in the communication of visual ideas for centuries. It is often the case that the development of a discipline can be traced through graphical representations and this is explored here in the context of concepts of visual science. As with any science, vision can be subdivided in a variety of ways. The classification adopted is in terms of optics, anatomy, and visual phenomena; each of these can in turn be further subdivided. Optics can be considered in terms of the nature of light and its transmission through the eye. Understanding of the gross anatomy of the eye and visual pathways was initially dependent upon the skills of the anatomist whereas microanatomy relied to a large extent on the instruments that could resolve cellular detail, allied to the observational skills of the microscopist. Visual phenomena could often be displayed on the printed page, although novel instruments expanded the scope of seeing, particularly in the nineteenth century.     

THINKING HISTORICALLY ABOUT THINKING HISTORICALLY: IS HISTORICAL THEORY A HISTORICAL OR A METAHISTORICAL PRACTICE?

This intimidating and massive collection of twenty‐nine extended, diverse essays by distinguished scholars, organized around the general theme of the current state and future direction of historical theory, raises some fundamental questions about historical theory as practiced over the past half century as well as about the distinctive nature of historical theory within the broader context of the production of historical knowledge. The editors of the volume suggest that the postmodern linguistic turn in historical theory, especially as articulated by Hayden White and Michel Foucault, marked a decisive, epochal turning‐point in human historical self‐consciousness, the attainment of a mature stage of autonomous metahistorical reflection on the essential nature of what it means to be historical, on historicity per se. What came before is imagined as a series of preliminary stages, what came after as a working out of implications and consequences. I suggest that a close reading of the implicit and explicit arguments of the individual essays reveals a rather different kind of historical moment, one in which postmodern historical theory has increasingly been demystified of its alleged metahistorical status, and has emerged as a situated object of historical reflection and thus has itself become increasingly defined as historical, recognized in its particularity as a temporally and culturally framed form of historical knowledge.     

Emergence of the American manufacturing belt: an interpretation

This study proposes that the American manufacturing belt emerged during the antebellum years as a replicated set of regional industrial systems. A broad-based set of demands spurred the growth of regional manufactures, including the pivotal producer durables sector. Eastern regions industrialized first, and they were followed by frontier regions in the Midwest. The relative importance of regional market manufactures declined over time and multiregional/national market manufactures increased. Regional industrial systems became increasingly specialized; the result was higher levels of interregional trade in industrial specialties. The decline of regional market manufactures eroded the bases for the emergence of regional industrial systems by the 1860s. The westward spread of the manufacturing belt ended, and internal differentiation and structural change within the belt were characteristics of late nineteenth century industrialization. The South failed to join the manufacturing belt during the antebellum years because regional demands for manufactures were insufficient to support important regional industrial systems. It lacked the bases to participate significantly in late nineteenth century industrialization.     

Quantification of dental caries by osteologists and odontologists—a validity and reliability study

As in modern populations, dental caries in early populations is linked to diet and general health. In order to record not only advanced disease states with frank cavitation of teeth but also early lesions, indicating the presence of the disease in a population, it is important that the archaeologist can correctly detect and classify lesions of varying severity. The present study compares and contrasts quantification of dental caries by osteologists and odontologists. Four osteologists and four odontologists undertook visual and radiographic inspection of 61 teeth from three different sources: medieval, 19th century and modern. Separate sets of criteria were applied to disclose observer confidence in detecting a lesion and in estimating lesion extent. For validation of visual assessments, the teeth were sectioned. Radiographic assessments were validated by a specialist in dental radiography. The results disclosed that the odontologists in general showed greater sensitivity than the osteologists, correctly identifying carious lesions, but the osteologists had higher specificity, correctly identifying healthy teeth. Thus, the osteologists tend to overlook carious lesions (under‐diagnosis), while the odontologists tend to incorrectly record lesions in healthy teeth (over‐diagnosis). For both osteologists and odontologists, correct assessment was poorer for radiographs than for visual inspection. Copyright © 2009 John Wiley & Sons, Ltd.     

Landscapes of deliquescence in Michelangelo Antonioni's Red Desert

The cinematic landscape provides a rich opportunity to explore cultural representations of place, space and nature. This essay focuses on the depiction of landscape in Michelangelo Antonioni's Red Desert (1964 ). Previous approaches to the critical interpretation of landscape in the cinema of Antonioni have been characterized by three principal weaknesses: a narrow emphasis on formalist and auterist lines of influence between different branches of the visual arts; an attachment to exceptionalist characterizations of the Italian cinematic landscape; and a transhistorical interpretation of existential themes such as alienation. In this essay we shall consider two neglected themes: the significance of the technological sublime for the aesthetic experience of industrial landscapes; and the impact of abstract expressionism on Antonioni's cinematic vision. We will counter simplistic categorizations of Antonioni's work by considering the complexity of the relationship between the cinematic landscape and wider developments in twentieth-century modernism. The essay concludes by locating Red Desert at a unique juncture in the development of modernist conceptions of nature and landscape.     

丸山真男学术立论中的事实与想象--"原型论"与"日本主义"情结

丸山真男的学术研究,在揭示出“日本早期近代化的基础奠定于江户时代”这一重要事实的同时,也超事实超学理地扩张了他的想象,这种想象,集中体现在他所提出的“原型论”当中,由于该理论与“日本主义”之间存有内在,本质和必然的联系,而这种联系又直接与少数人根深蒂固的“中国文化蔑视论”互为表里,因此,提出并正确认识这一问题,相信将有助于加强21世纪中日两国深层次的学术交流。