Letteratura scientifica selezionata sul tema "PARM (Physically Aware Reference Model)"

Peer-to-Peer (P2P) technologies developed rapidly in different directions with various applications and routing mechanisms. Each of them deals with a particular task, and/or provides a specific service. They were developed separately without a unified architecture taking into account all the performance factors of a P2P system. This makes the P2P systems incomplete and their performances far from optimal. This trend also restricts the interoperability amongst the systems because of the lack of standardization in functional architectures of the P2P systems. As a result, tangible benefits for Internet users are limited because the edge-Internet resources are not sharable amongst the systems. Inspired by TCP/IP model, this paper introduces PARM: a Physically-Aware Reference Model for Overlay Internetworking, which is an open reference structure for designing better performance P2P systems. PARM divides major functional P2P system tasks into layers so that they can be tackled individually and efficiently. A Peer Name Service was developed to evaluate the model. The service interprets peer names into their current locations. Simulation results indicate that PARM helps to produce excellent performance overlays. The overlays can achieve desirable features such as decentralization, self-organization, scalability, low overhead and minimal delay penalty.

In previous works, the perceived safety and comfort are currently not the principal objectives of all industries, especially robotics system. It might lead not to take psychological safety into consideration of adjusting robot behavior, hence, the human-robot interaction lacks of ease and naturalness. In this paper, a novel framework of human’s zones to ensure safety for social interactions in human-machine system is proposed. In the context of service robot in hospital, machine should not produce any actions that may induce worry, surprise or bother. To maintain the comfortable interaction, an algorithm to update human’s state into personal space is developed. Then, a motion model of robot is demonstrated with assumption of the reference path under segmentation. Dynamic Window Approach is employed for motion planning while Optimize Cost function searches the shortest path in a graph. To validate our approach, three test cases (without human-aware framework, with basic model of human’s zone and with extended personal space) are carried out in the same context. Moreover, three interactive indicators, for instance collision index (CI), interaction index (CII) and relative velocity of robot (Vr), are analyzed in different situations. Lack of human-aware framework, robot might break all thresholds and meet the potential collisions. While robot with basic model of human’s zone in its perception maintains the physically safe thresholds but not socially, it respects whole criterions in both physical constraints and social relations. As a result, our findings are useful for robot’s navigation in presence of human while the socially comfortable interaction is guaranteed.

The article opens a series of thematic publications, which should outline the current state of preservation and destruction of historically important objects of cultural heritage - fortifications. Based on field studies of fortresses and available digital materials, the author derives a cause-and-effect algorithm for the destruction of 11 selected research objects. The description of the state of preservation includes a general description of the territory and objects of fortification, the identified losses. The article opens a cycle of thematic publications, which should outline the current state of preservation and destruction of historically important objects of cultural heritage - fortifications. On the basis of field studies of fortresses and available digital materials, the author derived a cause-and-effect algorithm for the destruction of 11 selected research objects. The description of the state of preservation includes a general description of the territory and objects of fortification, discovered losses. Annual monitoring of the state of preservation of fortifications is not a component of the reports of local and regional departments for the protection of monuments of immovable cultural heritage of Ukraine, the territory and objects of which are subordinate to the state. Brief information is found in the annual reports of archaeological expeditions, which describe the available remains of material substrates and found items of cultural layers (Collection, 1947-2022). In tourist and excursion reviews, which appear as author's articles and video tours (Butrov, 2021), we are often told which objects we can visit, brief popular information and historical figures. The authors do not deepen their publicly available reviews to the level of cause-and-effect relationships of the destruction, being guided by the general impression of visiting the sites of monuments of fortification art. Since the middle of the 20th century, interest in the fortresses of southern Ukraine (modern Odesa, Mykolaiv, and Kherson regions) has been traced in the publications of individual researchers of the Odessa Society of History and Antiquities ((Ivanyuk, 2011). Their works aim to specify, clarify historical events, deepen knowledge in fortification order the territory, introduce new historiographical sources into scientific circulation (Bertier-Delagarde, 1900) (Bertier-Delagarde, 1888) (Stamati, 1850). Only a limited number of researchers record the current state of fortresses, in particular, when creating security documentation or historical-architectural reference plans. The most relevant today are the descriptions of the terrain of the fortresses by historians and archaeologists Viktor Sapozhnikov, Andrii Krasnozhon, Iryna Stankevich (Karashevych), Oleksandr Stepanchenko, architect Viktor Vecherskyi. Currently, there are almost no detailed descriptions and studies of the material component of the architectural details of the buildings and the territory of the monuments, which mostly limits the introduction and use of modern materials during restoration and restoration. The method of work consists in a field survey, carried out under the condition of the possibility of architectural measurements and a mathematical calculation of the volume of losses of objects over the last hundred years. The starting model of the calculation is a three-dimensional model of the researched fortress created on the basis of archival drawings and images, which in general spatial parameters corresponds to the architectural dimensions. Part of the fortresses, in particular Ochakiv, Kinbourn and Kiliya, are currently completely lost objects, it is impossible to carry out architectural measurements of the remains, therefore three-dimensional models of fortress reconstructions are used in relative volumes, not actual ones. Two main groups of destruction factors were identified: anthropogenic and natural. Anthropogenic include: 1.1. Violation of the boundaries of the monument. which are defined in the IAOP, unauthorized or system land development; 1.2. Extraction of land, sand and arrangement of landfills for household waste. Mechanical destruction of earth lines of fortifications; 1.3. Use of landmark stones as building material by local residents; 1.4. Unregistered archaeological searches - black archaeologists; 1.5. General vandalism; 1.6. Fortification measures were carried out in an unprofessional manner; 1.7. Military operations. Currently, there is an important issue of entering the territories of fortification objects - fortresses, castles, fort posts - objects of fortification art of the south of Ukraine into the list of historical monuments of local importance, because in this way it is possible to achieve their rightful protection and conservation. Entering areas into protected zones, assigning a protected number and recognizing historical value becomes the reason for bringing the local population to criminal responsibility in case of conscious and unconscious destruction, littering, conducting illegal economic activities. The minimization of anthropogenic impact on the territory and the surviving material remains of objects of fortification art should become the basis for the implementation of monument protection measures. Natural factors include: 2.1. Weathering of earth and stone, falling of bricks or collapse of wall fragments; 2.2. Irrigation and wetting of the grounds of the attraction; 2.3. Brick wetting and biodamage The influence of climatic factors is almost impossible to stop, because they do not depend on the activities of the local population, and to minimize them - yes. Each project of monument protection measures or conservation project must include measures for amortization of climatic changes, take into account forecasts and calculation of possible risks of using materials and technical equipment on the territory of monuments of fortification art. Modern materials and mixtures of polymeric substances can protect limestone surfaces from intense insolation and erosion. Monitoring of the state of preservation should go from visual and quantitative (use of photo reports and measurements, installation of dynamic beacons) to digital - use soundings and calendar checks of the molecular composition of stone and plaster to check and clarify the factors of destruction, develop a program for mitigating climate impacts. Carrying out drainage works, draining or watering the necessary areas to ensure the equalization of microclimatic indicators, to prevent landslides or wind erosion. The study of microdendrology and stone biodamage of fortresses in southern Ukraine is rather limited or inaccessible to specialists in architecture and monument preservation. Currently, it is not known which algae, mosses and plants deteriorate the structure of the stone or contribute to its preservation. Exudation on the surface and inside the stone or brick manifests itself differently in different regions. Only the next molecular studies of the materials from which the monuments were built will provide a greater range of possibilities in the use of ancient fortification technologies or the introduction and invention of new restoration materials. The most dangerous are the illegal economic activities of the local population, the absence of warning signs, lack of information about fines and criminal liability, and monitoring of violations should be on the eve of significant restoration works. The community that will use the monument must be aware of the challenges and risks caused by careless treatment of the object of protection, in this case a monument of fortification art. Conducting joint seminars and training camps for children and teenagers with scientists will expand their awareness of the value of fortresses and adjacent territories, and will avoid vandalism and systematic littering of the territory based on the principle of "common open use". In the future, the wishes and demands of the community can be taken into account in the project of restoration and adaptation of monuments to the modern needs and functions of the community itself, thus we will get rid of the physical and cultural isolation of the monument and the user. In general, the fortification areas are filled unevenly, there is fragmentary preservation of individual structures or territories of the defensive field. The complete preservation of the fortification environment, in which all the constituent parts were present, was not found. The Akkerman fortress (47.5%) is classified as an incomplete integral state of preservation, and the Kherson, Izmail, and Perekop fortresses are classified as average (40%). These fortresses include the outer lines of defense lines, walls, gates and planning parcelling, fragments of the defensive field, and fortification inspection fronts. These fortresses are well located within the city center and are a popular place for recreation and public events. They require regulation of visiting regimes, discovery and emphasis of architectural and spatial qualities, improvement of the quality of exposition of the historical landscape. The Perekop Fortress requires separate preservation and exhibition measures, the development of which is currently problematic. The fragmentarily preserved fortresses (Kinburn and Kiliya) do not have significant spatial elements of fortification, are lost and built over, but their historical and cultural significance for modern Ukraine is important, the reproduction or exhibition of these objects is of state importance. Unfortunately, the lost fortresses (Tatar-Bunar, Yeni-Duniya, Ochakiv, Kuchuk Hasan Pasha, Khadzhibey) do not have resources for architectural or landscape reproduction, their territory is completely built-up and degraded, they are in the state of an archaeological monument. Risks of further loss of historical-architectural and spatial qualities were identified for all the examined fortresses. The integrity of the historical landscapes of fortresses directly depends on the economic activity of local residents. Due to agriculture, the Ajider fortress may lose part of the defensive moat and be built up by private sector economic structures. Active clogging of fortress grounds leads to loss of interest in visiting, general aesthetic properties of panoramas. The littering and remoteness of the earthen lines of Izmail's fortifications, bordering with the fences of industrial territories creates a depressing impression, a sense of danger. Also, active earthworks can destroy the geometry of the profile of the earthen bastions of the fortress. The lost fortresses (Tatar-Bunar, Yeni-Duniya, Ochakiv, Kuchuk Hasan Pasha, Hadjibey, Kiliya, Kinburn) were subjected to a complex of destructive factors for a long time. The Yeni-Duniya fortress, which was dismantled for the purpose of building a new fort post and setting up a gun bridgehead, was completely destroyed in one moment. The Hadjibey fortress was destroyed in order to arrange a park and a recreation and festival area. The territory of the Kuchuk Hasan Pasha fort was rebuilt recently, so it is impossible to determine the extent and factors of the structure's destruction, stating only that it was a deliberate reconstruction. Tatar-bunar fortress, one of the examples of gradual natural and anthropogenic destruction, part of its bricks were used for construction of surrounding buildings, the rest – has undergone natural erosion. It is known that some of the large white brick blocks of Fort Kinbourn were used by the locals as building material, and then the estuary and the wind completely buried any remains of the mighty fortress in the sand.

Low-order thermoacoustic models are qualitatively correct, but typically, they are quantitatively inaccurate. We propose a time-domain bias-aware method to make qualitatively low-order models quantitatively (more) accurate. First, we develop a Bayesian ensemble data assimilation method for a low-order model to self-adapt and self-correct any time that reference data become available. Second, we apply the methodology to infer the thermoacoustic states and heat-release parameters on the fly without storing data (real time). We perform twin experiments using synthetic acoustic pressure measurements to analyse the performance of data assimilation in all nonlinear thermoacoustic regimes, from limit cycles to chaos, and interpret the results physically. Third, we propose practical rules for thermoacoustic data assimilation. An increase, reject, inflate strategy is proposed to deal with the rich nonlinear behaviour; and physical time scales for assimilation are proposed in non-chaotic regimes (with the Nyquist–Shannon criterion) and in chaotic regimes (with the Lyapunov time). Fourth, we perform data assimilation using data from a higher-fidelity model. We introduce an echo state network to estimate in real time the forecast bias, which is the model error of the low-fidelity model. We show that: (i) the correct acoustic pressure, parameters, and model bias can be inferred accurately; (ii) the learning is robust as it can tackle large uncertainties in the observations (up to 50 % of the mean values); (iii) the uncertainty of the prediction and parameters is naturally part of the output; and (iv) both the time-accurate solution and statistics can be inferred successfully. Data assimilation opens up new possibility for real-time prediction of thermoacoustics by combining physical knowledge and experimental data synergistically.

Machines that fit the human environment instead of forcing humans to enter theirs will make using a computer as refreshing as taking a walk in the woods. Mark Weiser on ubiquitous computing (21st Century Computer 104) In 2007, a forum entitled HCI 2020: Human Values in a Digital Age sought to address the questions: What will our world be like in 2020? Digital technologies will continue to proliferate, enabling ever more ways of changing how we live. But will such developments improve the quality of life, empower us, and make us feel safer, happier and more connected? Or will living with technology make it more tiresome, frustrating, angst-ridden, and security-driven? What will it mean to be human when everything we do is supported or augmented by technology? (Harper et al. 10) The forum came as a response to, what many call, post-PC technological developments; developments that seek to engulf our lives in digital technologies which in their various forms are meant to support and augment our everyday lives. One of these developments has been the project of ubiquitous computing along with its kin project, tangible computing. Ubiquitous computing (ubicomp) made its appearance in the late 1980s in the labs of Xerox’s Palo Alto Research Center (PARC) as the “third wave” in computing, following those of the mainframe and personal computing (Weiser, Open House 2). Mark Weiser, who coined the term, along with his collaborators at Xerox PARC, envisioned a “new technological paradigm” which would leave behind the traditional one-to-one relationship between human and computer, and spread computation “ubiquitously, but invisibly, throughout the environment” (Weiser, Gold and Brown 693). Since then, the field has grown and now counts several peer-reviewed journals, conferences, and academic and industrial research centres around the world, which have set out to study the new “post-PC computing” under names such as Pervasive Computing, Ambient Intelligence, Tangible Computing, The Internet of Things, etc. Instead of providing a comprehensive account of all the different ubicomp incarnations, this paper seeks to focus on the early projects and writings of some of ubicomp’s most prominent figures and tease out, as a way of critique, the origins of some of its romantic promises. From the outset, ubiquitous computing was heavily informed by a human-centred approach that sought to shift the focus from the personal computer back to its users. On the grounds that the PC has dominated the technological landscape at the expense of its human counterparts, ubiquitous computing promised a different human-machine interaction, with “machines that fit the human environment instead of forcing humans to enter theirs” (104, my italics) placing the two in opposite and antagonistic terrains. The problem comes about in the form of interaction between people and machines … So when the two have to meet, which side should dominate? In the past, it has been the machine that dominates. In the future, it should be the human. (Norman 140) Within these early ubicomp discourses, the computer came to embody a technological menace, the machine that threatened the liberal humanist value of being free and in control. For example, in 1999 in a book that was characterized as “the bible of ‘post-PC’ thinking” by Business Week, Donald Norman exclaimed: we have let ourselves to be trapped. … I don’t want to be controlled by a technology. I just want to get on with my life, … So down with PC’s; down with computers. All they do is complicate our lives. (72) And we read on the website of MIT’s first ubicomp project Oxygen: For over forty years, computation has centered about machines, not people. We have catered to expensive computers, pampering them in air-conditioned rooms or carrying them around with us. Purporting to serve us, they have actually forced us to serve them. Ubiquitous computing then, in its early incarnations, was presented as the solution; the human-centred, somewhat natural approach, which would shift the emphasis away from the machine and bring control back to its legitimate owner, the liberal autonomous human subject, becoming the facilitator of our apparently threatened humanness. Its promise? An early promise of regressive augmentation, I would say, since it promised to augment our lives, not by changing them, but by returning us to a past, better world that the alienating PC has supposedly displaced, enabling us to “have more time to be more fully human” (Weiser and Brown). And it sought to achieve this through the key characteristic of invisibility, which was based on the paradox that while more and more computers will permeate our lives, they will effectively disappear. Ubicomp’s Early Romantic Promises The question of how we can make computers disappear has been addressed in computer research in various ways. One of the earliest and most prominent of these is the approach, which focuses on the physicality of the world seeking to build tangible interfaces. One of the main advocates of this approach is MIT’s Tangible Media Group, led by Professor Hiroshi Ishii. The group has been working on their vision, which they call “Tangible Bits,” for almost two decades now, and in 2009 they were awarded the “Lasting Impact Award” at the ACM Symposium on User Interface Software and Technology (UIST) for their metaDesk platform, presented in 1997 (fig.1), which explores the coupling of everyday physical objects with digital information (Ullmer and Ishii). Also, in 2004 in a special paper titled “Bottles: A Transparent Interface as a Tribute to Mark Weiser”, Ishii presented once again an early project he and his group developed in 1999, and for which they were personally commented by Weiser himself. According to Ishii, bottles (fig. 2)—a system which comprises three glass bottles “filled with music” each representing a different musical instrument, placed on a Plexiglas “stage” and controlled by their physical manipulation (moving, opening or closing them)—no less, “illustrates Mark Weiser’s vision of the transparent (or invisible) interface that weaves itself into the fabric of everyday life” (1299). Figure 1: metaDesk platform (MIT Tangible Media Group) Figure 2: musicBottles (MIT Tangible Media Group) Tangible computing was based on the premise that we inhabit two worlds: the physical world and cyberspace, or as Ishii and Ullmer put it, the world of atoms and the world of bits claiming that there is gap between these two worlds that left us “torn between these parallel but disjoint spaces” (1). This agreed with Weiser’s argument that cyberspace, and specifically the computer, has taken centre stage leaving the real world—the real people, the real interactions—in the background and neglected. Tangible computing then sought to address this problem by "bridging the gaps between both cyberspace and the physical environment" (1). As Ishii and Ullmer wrote in 1997: The aim of our research is to show concrete ways to move beyond the current dominant model of GUI [Graphic User Interface] bound to computers with a flat rectangular display, windows, a mouse, and a keyboard. To make computing truly ubiquitous and invisible, we seek to establish a new type of HCI that we call "Tangible User Interfaces" (TUIs). TUIs will augment the real physical world by coupling digital information to everyday physical objects and environments. (2) “Our intention is to take advantage of natural physical affordances to achieve a heightened legibility and seamlessness of interaction between people and information” (2). In his earlier work computer scientist Paul Dourish turned to phenomenology and the concept of embodiment in order to develop an understanding of interaction as embodied. This was prior to his recent work with cultural anthropologist Bell where they examined the motivating mythology of ubiquitous computing along with the messiness of its lived experience (Dourish and Bell). Dourish, in this earlier work observed that one of the common critical features early tangible and ubiquitous computing shared is that “they both attempt to exploit our natural familiarity with the everyday environment and our highly developed spatial and physical skills to specialize and control how computation can be used in concert with naturalistic activities” (Context-Aware Computing 232). They then sought to exploit this familiarity in order to build natural computational interfaces that fit seamlessly within our everyday, real world (Where the Action Is 17). This idea of an existing set of natural tactile skills appears to come hand-in-hand with a nostalgic, romantic view of an innocent, simple, and long gone world that the early projects of tangible and ubiquitous computing sought to revive; a world where the personal computer not only did not fit, an innocent world in fact displaced by the personal computer. In 1997, Ishii and Ullmer wrote about their decision to start their investigations about the “future of HCI” in the museum of the Collection of Historic Scientific Instruments at Harvard University in their efforts to get inspired by “the aesthetics and rich affordances of these historical scientific instruments” concerned that, “alas, much of this richness has been lost to the rapid flood of digital technologies” (1). Elsewhere Ishii explained that the origin of his idea to design a bottle interface began with the concept of a “weather forecast bottle;” an idea he intended to develop as a present for his mother. “Upon opening the weather bottle, she would be greeted by the sound of singing birds if the next day’s weather was forecasted to be clear” (1300). Here, we are introduced to a nice elderly lady who has opened thousands of bottles while cooking for her family in her kitchen. This senior lady; who is made to embody the symbolic alignment between woman, the domestic and nature (see Soper, Rose, Plumwood); “has never clicked a mouse, typed a URL, nor booted a computer in her life” (Ishii 1300). Instead, “my mother simply wanted to know the following day’s weather forecast. Why should this be so complicated?” (1300, my italics). Weiser also mobilised nostalgic sentiments in order to paint a picture of what it would be to live with ubiquitous computing. So, for example, when seeking a metaphor for ubiquitous computing, he proposed “childhood – playful, a building of foundations, constant learning, a bit mysterious and quickly forgotten by adults” (Not a Desktop 8). He viewed the ubicomp home as the ideal retreat to a state of childhood; playfully reaching out to the unknown, while being securely protected and safely “at home” (Open House). These early ideas of a direct experience of the world through our bodily senses along with the romantic view of a past, simple, and better world that the computer threatened and that future technological developments promised, could point towards what Leo Marx has described as America’s “pastoral ideal”, a force that, according to Marx, is ingrained in the American view of life. Balancing between primitivism and civilisation, nature and culture, the pastoral ideal “is an embodiment of what Lovejoy calls ‘semi-primitivism’; it is located in a middle ground somewhere ‘between’, yet in a transcendent relation to, the opposing forces of civilisation and nature” (Marx 23). It appears that the early advocates of tangible and ubiquitous computing sought to strike a similar balance to the American pastoral ideal; a precarious position that managed to reconcile the disfavour and fear of Europe’s “satanic mills” with an admiration for the technological power of the Industrial Revolution, the admiration for technological development with the bucolic ideal of an unspoiled and pure nature. But how was such a balance to be achieved? How could the ideal middle state be achieved balancing the opposing forces of technological development and the dream of the return to a serene pastoral existence? According to Leo Marx, for the European colonisers, the New World was to provide the answer to this exact question (101). The American landscape was to become the terrain where old and new, nature and technology harmonically meet to form a libertarian utopia. Technology was seen as “‘naturally arising’ from the landscape as another natural ‘means of happiness’ decreed by the Creator in his design of the continent. So, far from conceding that there might be anything alien or ‘artificial’ about mechanization, technology was seen as inherent in ‘nature’; both geographic and human” (160). Since then, according to Marx, the idea of the “return” to a new Golden Age has been engrained in the American culture and it appears that it informs ubiquitous computing’s own early visions. The idea of a “naturally arising” technology which would facilitate our return to the once lost garden of security and nostalgia appears to have become a common theme within ubiquitous computing discourses making appearances across time and borders. So, for example, while in 1991 Weiser envisioned that ubiquitous technologies will make “using a computer as refreshing as taking a walk in the woods” (21st Century Computer 11), twelve years later Marzano writing about Philip’s vision of Ambient Intelligence promised that “the living space of the future could look more like that of the past than that of today” (9). While the pastoral defined nature in terms of the geographical landscape, early ubiquitous computing appeared to define nature in terms of the objects, tools and technologies that surround us and our interactions with them. While pastoral America defined itself in contradistinction to the European industrial sites and the dirty, smoky and alienating cityscapes, within those early ubiquitous computing discourses the role of the alienating force was assigned to the personal computer. And whereas the personal computer with its “grey box” was early on rejected as the modern embodiment of the European satanic mills, computation was welcomed as a “naturally arising” technological solution which would infuse the objects which, “through the ages, … are most relevant to human life—chairs, tables and beds, for instance, … the objects we can’t do without” (Marzano 9). Or else, it would infuse the—newly constructed—natural landscape fulfilling the promise that when the “world of bits” and the “world of atoms” are finally bridged, the balance will be restored. But how did these two worlds come into existence? How did bits and atoms come to occupy different and separate ontological spheres? Far from being obvious or commonsensical, the idea of the separation between bits and atoms has a history that grounds it to specific times and places, and consequently makes those early ubiquitous and tangible computing discourses part of a bigger story that, as documented (Hayles) and argued (Agre), started some time ago. The view that we inhabit the two worlds of atoms and bits (Ishii and Ullmer) was endorsed by both early ubiquitous and tangible computing, it was based on the idea of the separation of computation from its material instantiation, presenting the former as a free floating entity able to infuse our world. As we saw earlier, tangible computing took the idea of this separation as an unquestionable fact, which then served as the basis for its research goals. As we read in the home page of the Tangible Media Group’s website: Where the sea of bits meets the land of atoms, we are now facing the challenge of reconciling our dual citizenship in the physical and digital worlds. "Tangible Bits" is our vision of Human Computer Interaction (HCI): we seek a seamless coupling of bits and atoms by giving physical form to digital information and computation (my italics). The idea that digital information does not have to have a physical form, but is given one in order to achieve a coupling of the two worlds, not only reinforces the view of digital information as an immaterial entity, but also places it in a privileged position against the material world. Under this light, those early ideas of augmentation or of “awakening” the physical world (Ishii and Ullmer 3) appear to be based on the idea of a passive material world that can be brought to life and become worthy and meaningful through computation, making ubiquitous computing part of a bigger and more familiar story. Restaging the dominant Cartesian dualism between the “ensouled” subject and the “soulless” material object, the latter is rendered passive, manipulable, and void of agency and, just like Ishii’s old bottles, it is performed as a mute, docile “empty vessel” ready to carry out any of its creator’s wishes; hold perfumes and beverages, play music, or tell the weather. At the same time, computation was presented as the force that could breathe life to a mundane and passive world; a free floating, somewhat natural, immaterial entity, like oxygen (hence the name of MIT’s first ubicomp project), like the air we breathe that could travel unobstructed through any medium, our everyday objects and our environment. But it is interesting to see that in those early ubicomp discourses computation’s power did not extend too far. While computation appeared to be foregrounded as a powerful, almost magic, entity able to give life and soul to a soulless material world, at the same time it was presented as controlled and muted. The computational power that would fill our lives, according to Weiser’s ubiquitous computing, would be invisible, it wouldn’t “intrude on our consciousness” (Weiser Not a Desktop 7), it would leave no traces and bring no radical changes. If anything, it would enable us to re-establish our humanness and return us to our past, natural state promising not to change us, or our lives, by introducing something new and unfamiliar, but to enable us to “remain serene and in control” (Weiser and Brown). In other words, ubiquitous computing, as this early story goes, would not be alienating, complex, obtrusive, or even noticeable, for that matter, and so, at the end of this paper, we come full circle to ubicomp’s early goals of invisibility with its underpinnings of the precarious pastoral ideal. This short paper focused on some of ubicomp’s early stories and projects and specifically on its promise to return us to a past and implicitly better world that the PC has arguably displaced. By reading these early promises of, what I call, regressive augmentation through Marx’s work on the “pastoral ideal,” this paper sought to tease out, in order to unsettle, the origins of some of ubicomp’s romantic promises. References Agre, P. E. 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Feminism and Geography. Cambridge: Polity, 1993. Soper, K. “Naturalised Woman and Feminized Nature.” In L. Coupe (ed.), The Green Studies Reader: From Romanticism to Ecocriticism. London: Routledge, 2000. Ullmer, B., and H. Ishii. “The metaDESK: Models and Prototypes for Tangible User Interfaces.” In UIST '97, Proceedings of the 10th Annual ACM Symposium on User Interface Software and Technology. New York: ACM, 1997. 223-232. Weiser, M. “The Computer for the 21st Century." Scientific American 265.3 (1991): 94-104. ———. “The Open House.” ITP Review 2.0, 1996. 1 Dec. 2013 ‹http://makingfurnitureinteractive.files.wordpress.com/2007/09/wholehouse.pdf›. ———. “The World Is Not a Desktop." Interactions 1.1 (1994): 7-8. Weiser, M., and J.S. Brown. “The Coming Age of Calm Technology.” 1996. 1 Dec. 2013 ‹http://www.johnseelybrown.com/calmtech.pdf›. Weiser, M., R. Gold, and J.S. Brown. “The Origins of Ubiquitous Computing at PARC in the Late 80s.” Pervasive Computing 38 (1999): 693-696.

Should ethical standards be enforced on performers or their critics? Asking such a question may stimulate memories of personal or professional censorship and fearful imaginings of oppressive, fascist regimes. Indeed, many of us might immediately respond by arguing that personal expression should never be inhibited since a person's right to free expression is an essential tenet of a democratic society. Yet this question raises issues that are not easily dismissed and it may remind us that it is equally important to remember that a number of responsibilities and repercussions can accompany the public expression of personal experiences and opinions. A short time ago, I was told that this journal had to grapple with similar considerations when a performer decided to pursue legal action after reading a critical account of his/her performance in M/C Reviews. When I was first asked to comment on this situation, I initially found myself considering familiar arguments that defend the right to free speech. However, upon reflection, I think there is more to be said about the long term causes and effects of such an action and I wish to explore how this incident illustrates the friction that can be generated when traditional and emergent value systems are adopted indiscriminately. To me, the dispute between the performer and M/C illustrates what seems to be a growing confusion surrounding interpretations of what is right (what is legal or permissible?), what is true (whose opinion?), and what is good (the performance or an audience's response?). Although definitions of what is right, true, and good have always had to negotiate shifting boundaries, the increasingly blurry usages of these terms are reflecting a waxing disregard for how these distinctions impact upon our judgements. Jon McKenzie has offered some explanation of this new social attitude in his recently published text Perform or Else. Throughout this text, he argues that 'performance' is now widely recognised in commercial industries as a conceptual tool for assessing human and technological standards and that this concept is fast becoming the dominant social model of evaluation. According to McKenzie, traditional philosophical distinctions are becoming less influential, while performance 'effectiveness' and 'efficiency' are increasingly being viewed as the new measurements of what is right, true, and good (178-79). McKenzie's assessment of the social demand to perform echoes the comments of other twentieth-century theorists who have warned us of the growing objectification and alienation of human labour. However, his message is timely and provocative and it offers some explanation of the confusion surrounding critical appraisals of performances and performer's experiences. There is certainly evidence of a growing demand for efficient and effective appraisal of all human performance as individuals, companies, and governments produce reports, conduct market research, and continue to try and predict what results will be produced before any investment of personal or financial energy is committed. Yet as our society continues to develop a dependency on critical opinion, it unfortunately seems to be distancing audiences and performers, devaluing personal interpretations, and encouraging fewer exchanges between groups with varying values. Such distinctive separations can, in turn, isolate social groups and identities and invite exclusivity and intolerance for other evaluations. This kind of alienation seems to have governed the dispute between the performer and the critic from M/C. Although these trends may have made it socially 'permissible' to pursue legal action against critics, performers, or anyone else who expresses negative or unpalatable opinions, I think it is essential that we continue to ask whether is it right, or good to do so. Is it right or good to penalise someone for expressing a personal opinion? Is it right or good to object to an evaluation when someone offers a performance for appraisal? These are, of course, ethical questions that can only be hinted at here. However, I believe it is important to remember that live performing art forms can physically bring together varying social demographics and that they are therefore in a unique position to provide conceptual bridges between social groups with differing opinions. I wish to emphasise this fact and to ask readers to consider whether they wish opinions to become more and more polarised, or whether they wish to finds ways to enable us to appreciate and evaluate the diverse interpretations of performances more harmoniously. It is true that the 'objective' certainties associated with the basic principles of aesthetic appreciation are sagging under the weight of arguments from critical theory and postmodernism. It may also be true that the only certainty that will soon enjoy popular appeal may be one that suggests that pragmatic considerations should govern what we view as right, true, and good. All of these developments introduce challenges that need to be addressed. However, I do not believe they exclude the possibility that a shared theoretical perspective can be developed that can allow us to build bridges of understanding between varying opinions and social demands. Philosophers and social theorists such as Michael Stocker, Alessandro Ferrara, and Linda Zagzebski all agree that the development of such a perspective is possible. They have also suggested that finding this shared view may require us to embrace a more malleable and less certain way of knowing what is good about our opinions. Instead, they encourage individuals to reinvestigate ancient views of 'wisdom' and 'understanding' and to review personal emotional responses to what we believe is true and good. I believe such advice is valuable and that arguments like these offer theoretical tools for those involved in the criticism and practice of the performing arts still wanting to find bridges between disparate views. While 'critical' reviews can often alienate performers from those who are evaluating their performance, if we are to initiate understanding and tolerance, and celebrate and value difference, the beliefs and emotional responses that accompany and drive each of our opinions do require further reflection, articulation, and discussion. Some theatre critics already appear to recognise how important emotional responses are to the expression and reworking of personal and traditional beliefs. For example, some have suggested that a theatre performance can "make you stop breathing" (Christofis) or be "breathtaking" (McCallum) or "poignant and powerful" (Lambert). Other critics have suggested that performances contain "images of emotional power" (Kelly) with which an "audience can empathise, [and] sympathise" because the subject is close to their hearts" (Hinde). As these kinds of responses clearly embellish and entwine the experiences of performers and critics, perhaps we can eventually discover how powerful, passionate, and, sometimes, visceral experiences contribute benefits that can be objectively defined and defended. Alternatively, perhaps the inclusion of negative emotional responses in performances and critical reviews can provide some impetus for personal and professional development. Many might dismiss emotional responses as theoretical tools because individuals' emotional experiences reveal different qualities and/or intensities and seem to contain no shared causal indicator that can be objectively defined and graded. Yet if these kinds of experiences are really so subjective, so capricious and diverse, why do some theatre reviewers continue to describe and record them? If such reactions are peculiar to each individual and there is no guarantee that they can be replicated in other individuals, personal views of emotional and physical responses would only be viewed as useless, superfluous information. However, it seems that critics sharing their experiences are suggesting that something in the performance is powerful enough to evoke similar emotions in others. Furthermore, they seem to be indicating that these experiences are important and worth pursuing. So, instead of viewing powerful emotional responses as completely subjective, perhaps it is more accurate and fruitful to recognise how they signal the presence of beliefs and values that are formed inter-subjectively. A purely subjective appraisal of a performance would require a subject that is capable of receiving, processing and evaluating impressions in social isolation. A number of influential theorists like Bourdieu, Foucault, and Eagleton have argued that such a view is misleading since 'individuals' are developed from class and power relations and subjects cannot extricate themselves from social discourses of some kind. As a result of adopting perspectives like these, it is plausible to suggest that audiences may value or dismiss the ideas and experiences of the person recommending the performance as well as ideas about the performance itself. Furthermore, a person's experiences or ideas may seem to relate to our own, or be regarded as more valuable or significant than our own, and this may affect the way we assess any descriptions provided by others. Since emotional responses experienced by others can sometimes influence our own affective states, it seems theatres, critics, and performers that establish public social identities do need to become aware of how these experiences are stimulated. Some theatre scholars have suggested that analyses of the emotive element of audience reception must record and defend emotional responses according to an objective set of logical criteria that can be judged relevant by experts (Martin and Sauter 34; de Toro 120). However, the logical criteria that many performance scholars suggest should determine such evaluations are often purely empirical and I would suggest that the study of emotions and feelings must also incorporate the often forgotten epistemic values of personal understanding and wisdom. If these approaches are explored and integrated, I believe critics and performers may be reconciled through the recognition that personal opinions can change and that our responses should be discussed and defended rather than feared, attacked, or penalised. References Bourdieu, Pierre. Distinction: A Social Critique of the Judgement of Taste. Trans. Richard Nice. London: Routledge and Kegan Paul, 1986. Christofis, Lee. "Colour Amid Darkest Drama." Rev. of The Funniest Man in the World, by Daniel Keene. Keene/Taylor Theatre Project, Grant Street Theatre, Melbourne. The Australian. May 2000: F18 de Toro, Fernando. Theatre Semiotics: Text and Staging in Modern Theatre. Trans. John Lewis. Ed. Carole Hubbard. Toronto: U of Toronto P, 1995. Eagleton, Terry. The Ideology of the Aesthetic. Oxford: Blackwell, 1990. Ferrara, Alessandro. Reflective Authenticity: Rethinking the Project of Modernity. London: Routledge, 1998. Foucault, Michel. "What is an Author?" Aesthetics: The Big Questions. Ed. Carolyn Korsmeyer. Oxford: Blackwell, 1998. 270-87. Hinde, Suellen. "Play Oh So True." Rev. of Choking in the Comfort Zone, by Stephen Carleton. Darwin Theatre Company, Brown's Mart, Darwin. Northern Territory News 15 Sep. 2000: W26. Kelly, Veronica. "Pretty, But as Deep as a Shallow Puddle." Rev. of The Skin of Our Teeth, by Thornton Wilder. Queensland Theatre Company, Optus Playhouse, Brisbane. The Australian 21 Feb. 2000: F18. Lambert, Catherine. "Revival of a Classic." Rev. of Death of a Salesman, by Arthur Miller, Melbourne Theatre Company, Fairfax Theatre, Melbourne. Sunday Herald Sun, 23 July 2000: LH87. Martin, Jacqueline, and Willmar Sauter. Understanding Theatre. Stockholm: Almqvist and Wiksell International, 1995. McCallum, John. "Don't Keep it Quiet." Rev. of Hollow Ground, by Nick Parsons. The NIDA Company, Belvoir Street Theatre, Sydney. The Australian 27 Mar. 2000: F15. McKenzie, Jon. Perform or Else: From Discipline to Performance. London: Routledge, 2001. Stocker, Michael. Valuing Emotions. Cambridge: Cambridge UP, 1996. Zagzebski, Linda Trinkaus. Virtues of the Mind: An Inquiry into the Nature of Virtue and Ethical Foundations of Knowledge. Cambridge: Cambridge UP, 1996. Citation reference for this article MLA Style Kehoul, Gillian. "Performing Feeling Without Fear" M/C: A Journal of Media and Culture 5.1 (2002). [your date of access] < http://www.media-culture.org.au/0203/perform.php>. Chicago Style Kehoul, Gillian, "Performing Feeling Without Fear" M/C: A Journal of Media and Culture 5, no. 1 (2002), < http://www.media-culture.org.au/0203/perform.php> ([your date of access]). APA Style Kehoul, Gillian. (2002) Performing Feeling Without Fear. M/C: A Journal of Media and Culture 5(1). < http://www.media-culture.org.au/0203/perform.php> ([your date of access]).

The labyrinth is probably the most universal trope of complexity. Deriving from pre-Greek labyrinthos, a word denoting “maze, large building with intricate underground passages”, and possibly related to Lydian labrys, which signifies “double-edged axe,” symbol of royal power, the notion of the labyrinth primarily evokes the Minoan Palace in Crete and the myth of the Minotaur. According to this myth, the Minotaur, a monster with the body of a man and the head of a bull, was born to Pesiphae, king Minos’s wife, who mated with a bull when the king of Crete was besieging Athens. Upon his return, Minos commanded the artist Daedalus to construct a monumental building of inter-connected rooms and passages, at the center of which the King sought to imprison the monstrous sign of his disgrace. The Minotaur required human sacrifice every couple of years, until it was defeated by the Athenian prince Theuseus, who managed to extricate himself from the maze by means of a clue of thread, given to him by Minos’s enamored daughter, Ariadne (Parandowski 238-43). If the Cretan myth establishes the labyrinth as a trope of complexity, this very complexity associates labyrinthine design not only with disorientation but also with superb artistry. As pointed out by Penelope Reed Doob, the labyrinth is an inherently ambiguous construct (39-63). It presumes a double perspective: those imprisoned inside, whose vision ahead and behind is severely constricted, are disoriented and terrified; whereas those who view it from outside or from above – as a diagram – admire its structural sophistication. Labyrinths thus simultaneously embody order and chaos, clarity and confusion, unity (a single structure) and multiplicity (many paths). Whereas the modern, reductive view equates the maze with confusion and disorientation, the labyrinth is actually a signifier with two contradictory signifieds. Not only are all labyrinths intrinsically double, they also fall into two distinct, though related, types. The paradigm represented by the Cretan maze is mainly derived from literature and myth. It is a multicursal model, consisting of a series of forking paths, each bifurcation requiring new choice. The second type is the unicursal maze. Found mainly in the visual arts, such as rock carvings or coin ornamentation, its structural basis is a single path, twisting and turning, but entailing no bifurcations. Although not equally bewildering, both paradigms are equally threatening: in the multicursal construct the maze-walker may be entrapped in a repetitious pattern of wrong choices, whereas in the unicursal model the traveler may die of exhaustion before reaching the desired end, the heart of the labyrinth. In spite of their differences, the basic similarities between the two paradigms may explain why they were both included in the same linguistic category. The labyrinth represents a road-model, and as such it is essentially teleological. Most labyrinths of antiquity and of the Middle Ages were designed with the thought of reaching the center. But the fact that each labyrinth has a center does not necessarily mean that the maze-walker is aware of its existence. Moreover, reaching the center is not always to be desired (in case it conceals a lurking Minotaur), and once the center is reached, the maze-walker may never find the way back. Besides signifying complexity and ambiguity, labyrinths thus also symbolically evoke the danger of eternal imprisonment, of inextricability. This sinister aspect is intensified by the recursive aspect of labyrinthine design, by the mirroring effect of the paths. In reflecting on the etymology of the word ‘maze’ (rather than the Greek/Latin labyrinthos/labyrinthus), Irwin observes that it derives from the Swedish masa, signifying “to dream, to muse,” and suggests that the inherent recursion of labyrinthine design offers an apt metaphor for the uniquely human faculty of self-reflexitivity, of thought turning upon itself (95). Because of its intriguing aspect and wealth of potential implications, the labyrinth has become a category that is not only formal, but also conceptual and symbolic. The ambiguity of the maze, its conflation of overt complexity with underlying order and simplicity, was explored in ideological systems rooted in a dualistic world-view. In the early Christian era, the labyrinth was traditionally presented as a metaphor for the universe: divine creation based on a perfect design, perceived as chaotic due to the shortcomings of human comprehension. In the Middle-Ages, the labyrinthine attributes of imprisonment and limited perception were reflected in the view of life as a journey inside a moral maze, in which man’s vision was constricted because of his fallen nature (Cazenave 348-350). The maze was equally conceptualized in dynamic terms and used as a metaphor for mental processes. More specifically, the labyrinth has come to signify intellectual confusion, and has therefore become most pertinent in literary contexts that valorize rational thought. And the rationalistic genre par excellence is detective fiction. The labyrinth may serve as an apt metaphor for the world of detective fiction because it accurately conveys the tacit assumptions of the genre – the belief in the existence of order, causality and reason underneath the chaos of perceived phenomena. Such optimistic belief is ardently espoused by the putative detective in Paul Auster’s metafictional novella City of Glass: He had always imagined that the key to good detective work was a close observation of details. The more accurate the scrutiny, the more successful the results. The implication was that human behavior could be understood, that beneath the infinite façade of gestures, tics and silences there was finally a coherence, an order, a source of motivation. (67) In this brief but eloquent passage Auster conveys, through the mind of his sleuth, the central tenets of classical detective fiction. These tenets are both ontological and epistemological. The ontological aspect is subsumed in man’s hopeful reliance on “a coherence, an order, a source of motivation” underlying the messiness and blood of the violent deed. The epistemological aspect is aptly formulated by Michael Holquist, who argues that the fictional world of detective stories is rooted in the Scholastic principle of adequatio rei et intellectus, the adequation of mind to things (157). And if both human reality and phenomenal reality are governed by reason, the mind, given enough time, can understand everything. The mind’s representative is the detective. He is the embodiment of inquisitive intellect, and his superior powers of observation and deduction transform an apparent mystery into an incontestable solution. The detective sifts through the evidence, assesses the relevance of data and the reliability of witnesses. But, first of foremost, he follows clues – and the clue, the most salient element of the detective story, links the genre with the myth of the Cretan labyrinth. For in its now obsolete spelling, the word ‘clew’ denotes a ball of thread, and thus foregrounds the similarity between the mental process of unraveling a crime mystery and the traveler’s progress inside the maze (Irwin 179). The chief attributes of the maze – circuitousness, enclosure, and inextricability – associate it with another convention of detective fiction, the trope of the locked room. This convention, introduced in Poe’s “The Murders in the Rue Morgue,” a text traditionally regarded as the first analytic detective story, establishes the locked room as the ultimate affront to reason: a hermetically sealed space which no one could have penetrated or exited and in which a brutal crime has nevertheless been committed. But the affront to reason is only apparent. In Poe’s ur-text of the genre, the violent deed is committed by an orangutan, a brutal and abused beast that enters and escapes from the seemingly locked room through a half-closed window. As accurately observed by Holquist, in the world of detective fiction “there are no mysteries, there is only incorrect reasoning” (157). And the correct reasoning, dubbed by Poe “ratiocination”, is the process of logical deduction. Deduction is an enchainment of syllogisms, in which a conclusion inevitably follows from two valid premises; as Dupin elegantly puts it, “the deductions are the sole proper ones and … the suspicion arises inevitably from them as a single result” (Poe 89). Applying this rigorous mental process, the detective re-arranges the pieces of the puzzle into a coherent and meaningful sequence of events. In other words – he creates a narrative. This brings us back to Irwin’s observation about the recursive aspect of the maze. Like the labyrinth, detective fiction is self-reflexive. It is a narrative form which foregrounds narrativity, for the construction of a meaningful narrative is the protagonist’s and the reader’s principal task. Logical deduction, the main activity of the fictional sleuth, does not allow for ambiguity. In classical detective fiction, the labyrinth is associated with the messiness and violence of crime and contrasted with the clarity of the solution (the inverse is true of postmodernist detective mysteries). The heart of the labyrinth is the solution, the vision of truth. This is perhaps the most important aspect of the detective genre: the premise that truth exists and that it can be known. In “The Murders in the Rue Morgue,” the initially insoluble puzzle is eventually transformed into a coherent narrative, in which a frantic orangutan runs into the street escaping the abuse of its master, climbs a rod and seeks refuge in a room inhabited by two women, brutally slashes them in confusion, and then flees the room in the same way he penetrated it. The sequence of events reconstructed by Dupin is linear, unequivocal, and logically satisfying. This is not the case with the ‘hard boiled’, American variant of the detective genre, which influenced the inception of film noir. Although the novels of Hammett, Chandler or Cain are structured around crime mysteries, these works problematize most of the tacit premises of analytic detective fiction and re-define its narrative form. For one, ‘hard boiled’ fiction obliterates the dualism between overt chaos and underlying order, between the perceived messiness of crime and its underlying logic. Chaos becomes all-encompassing, engulfing the sleuth as well as the reader. No longer the epitome of a superior, detached intellect, the detective becomes implicated in the mystery he investigates, enmeshed in a labyrinthine sequence of events whose unraveling does not necessarily produce meaning. As accurately observed by Telotte, “whether [the] characters are trying to manipulate others, or simply hoping to figure out how their plans went wrong, they invariably find that things do not make sense” (7). Both ‘hard-boiled’ fiction and its cinematic progeny implicitly portray the dissolution of social order. In film noir, this thematic pursuit finds a formal equivalent in the disruption of traditional narrative paradigm. As noted by Bordwell and Telotte, among others, the paradigm underpinning classical Hollywood cinema in the years 1917-1960 is characterized by a seemingly objective point of view, adherence to cause-effect logic, use of goal-oriented characters and a progression toward narrative closure (Bordwell 157, Telotte 3). In noir films, on the other hand, the devices of flashback and voice-over implicitly challenge conventionally linear narratives, while the use of the subjective camera shatters the illusion of objective truth (Telotte 3, 20). To revert to the central concern of the present paper, in noir cinema the form coincides with the content. The fictional worlds projected by the ‘hard boiled’ genre and its noir cinematic descendent offer no hidden realm of meaning underneath the chaos of perceived phenomena, and the trope of the labyrinth is stripped of its transcendental, comforting dimension. The labyrinth is the controlling visual metaphor of the Coen Brothers’ neo-noir film The Man Who Wasn’t There (2001). The film’s title refers to its main protagonist: a poker-faced, taciturn barber, by the name of Ed Crane. The entire film is narrated by Ed, incarcerated in a prison cell. He is writing his life story, at the commission of a men’s magazine whose editor wants to probe the feelings of a convict facing death. Ed says he is not unhappy to die. Exonerated of a crime he committed and convicted of a crime he did not, Ed feels his life is a labyrinth. He does not understand it, but he hopes that death will provide the answer. Ed’s final vision of life as a bewildering maze, and his hope of seeing the master-plan after death, ostensibly refer to the inherent dualism of the labyrinth, the notion of underlying order manifest through overt chaos. They offer the flicker of an optimistic closure, which subscribes to the traditional Christian view of the universe as a perfect design, perceived as chaos due to the shortcomings of human comprehension. But this interpretation is belied by the film’s final scene. Shot in blindingly white light, suggesting the protagonist’s revelation, the screen is perfectly empty, except for the electric chair in the center. And when Ed slowly walks towards the site of his execution, he has a sudden fantasy of the overhead lights as the round saucers of UFOs. The film’s visual metaphors ironically subvert Ed’s metaphysical optimism. They cast a view of human life as a maze of emptiness, to borrow the title of one of Borges’s best-known stories. The only center of this maze is death, the electric chair; the only transcendence, faith in God and in after life, makes as much sense as the belief in flying saucers. The Coen Brothers thus simultaneously construct and deconstruct the traditional symbolism of the labyrinth, evoking (through Ed’s innocent hope) its promise of underlying order, and subverting this promise through the images that dominate the screen. The transcendental dimension of the trope of the labyrinth, its promise of a hidden realm of meaning and value, is consistently subverted throughout the film. On the level of plot, the film presents a crisscrossed pattern of misguided intentions and tragi-comic misinterpretations. The film’s protagonist, Ed Crane, is estranged from his own life; neither content nor unhappy, he is passive, taking things as they come. Thus he condones Doris’s, his wife’s, affair with her employer, Big Dave, reacting only when he perceives an opportunity to profit from their liason. This opportunity presents itself in the form of Creighton Tolliver, a garrulous client, who shares with Ed his fail-proof scheme of making big money from the new invention of dry cleaning. All he needs to carry out his plan, confesses Creighton, is an investment of ten thousand dollars. The barber decides to take advantage of this accidental encounter in order to change his life. He writes an anonymous extortion letter to Big Dave, threatening to expose his romance with Doris and wreck his marriage and his financial position (Dave’s wife, a rich heiress, owns the store that Dave runs). Dave confides in Ed about the letter; he suspects the blackmailer is a con man that tried to engage him in a dry-cleaning scheme. Although reluctant to part with the money, which he has been saving to open a new store to be managed by Doris, Big Dave eventually gives in. Obviously, although unbeknownst to Big Dave, it is Ed who collects the money and passes it to Creighton, so as to become a silent partner in the dry cleaning enterprise. But things do not work out as planned. Big Dave, who believes Creighton to be his blackmailer, follows him to his apartment in an effort to retrieve the ten thousand dollars. A fight ensues, in which Creighton gets killed, not before revealing to Dave Ed’s implication in his dry-cleaning scheme. Furious, Dave summons Ed, confronts him with Creighton’s story and physically attacks him. Ed grabs a knife that is lying about and accidentally kills Big Dave. The following day, two policemen arrive at the barbershop. Ed is certain they came to arrest him, but they have come to arrest Doris. The police have discovered that she has been embezzling from Dave’s store (Doris is an accountant), and they suspect her of Dave’s murder. Ed hires Freddy Riedenschneider, the best and most expensive criminal attorney, to defend his wife. The attorney is not interested in truth; he is looking for a version that will introduce a reasonable doubt in the minds of the jury. At some point, Ed confesses that it is he who killed Dave, but Riedenschneider dismisses his confession as an inadequate attempt to save Doris’s neck. He concocts a version of his own, but does not get the chance to win the trial; the case is dismissed, as Doris is found hanged in her cell. After his wife’s death, Ed gets lonely. He takes interest in Birdy, the young daughter of the town lawyer (whom he initially approached for Doris’s defense). Birdy plays the piano; Ed believes she is a prodigy, and wants to become her agent. He takes her for an audition to a French master pianist, who decides that the girl is nothing special. Disenchanted, they drive back home. Birdy tells Ed, not for the first time, that she doesn’t really want to be a pianist. She hasn’t been thinking of a career; if at all, she would like to be a vet. But she is very grateful. As a token of her gratitude, she tries to perform oral sex on Ed. The car veers; they have an accident. When he comes to, Ed faces two policemen, who tell him he is arrested for the murder of Creighton Tolliver. The philosophical purport of the labyrinth metaphor is suggested in a scene preceding Doris’s trial, in which her cocky attorney justifies his defense strategy. To support his argument, he has recourse to the theory of some German scientist, called either Fritz or Werner, who claimed that truth changes with the eye of the beholder. Science has determined that there is no objective truth, says Riedenschneider; consequently, the question of what really happened is irrelevant. All a good attorney can do, he concludes, is present a plausible narrative to the jury. Freddy Riedenschneider’s seemingly nonchalant exposition is a tongue-in-cheek reference to Heisenberg’s uncertainty principle. Succinctly put, the principle postulates that the more precisely the position of a subatomic particle is determined, the less precisely its momentum is known in this instant, and vice versa. What follows is that concepts such as orbits of electrons do not exist in nature unless and until we measure them; or, in Heisenberg’s words, “the ‘path’ comes into existence only when we observe it” (qtd. in Cassidy). Heisenberg’s discovery had momentous scientific and philosophical implications. For one, it challenged the notion of causality in nature. The law of causality assumes that if we know the present exactly, we can calculate the future; in this formulation, suggests Heisenberg, “it is not the conclusion that is wrong, but the premises” (qtd. in Cassidy). In other words, we can never know the present exactly, and on the basis of this exact knowledge, predict the future. More importantly, the uncertainty principle seems to collapse the distinction between subjective and objective reality, between consciousness and the world of phenomena, suggesting that the act of perception changes the reality perceived (Hofstadter 239). In spite of its light tone, the attorney’s confused allusion to quantum theory conveys the film’s central theme: the precarious nature of truth. In terms of plot, this theme is suggested by the characters’ constant misinterpretation: Big Dave believes he is blackmailed by Creighton Tolliver; Ed thinks Birdy is a genius, Birdy thinks that Ed expects sex from her, and Ann, Dave’s wife, puts her faith in UFOs. When the characters do not misjudge their reality, they lie about it: Big Dave bluffs about his war exploits, Doris cheats on Ed and Big Dave cheats on his wife and embezzles from her. And when the characters are honest and tell the truth, they are neither believed nor rewarded: Ed confesses his crime, but his confession is impatiently dismissed, Doris keeps her accounts straight but is framed for fraud and murder; Ed’s brother in law and partner loyally supports him, and as a result, goes bankrupt. If truth cannot be known, or does not exist, neither does justice. Throughout the film, the wires of innocence and guilt are constantly crossed; the innocent are punished (Doris, Creighton Tolliver), the guilty are exonerated of crimes they committed (Ed of killing Dave) and convicted of crimes they did not (Ed of killing Tolliver). In this world devoid of a metaphysical dimension, the mindless processes of nature constitute the only reality. They are represented by the incessant, pointless growth of hair. Ed is a barber; he deals with hair and is fascinated by hair. He wonders how hair is a part of us and we throw it to dust; he is amazed by the fact that hair continues to grow even after death. At the beginning of the film we see him docilely shave his wife’s legs. In a mirroring scene towards the end, the camera zooms in on Ed’s own legs, shaved before his electrocution. The leitmotif of hair, the image of the electric chair, the recurring motif of UFOs – all these metaphoric elements convey the Coen Brothers’ view of the human condition and build up to Ed’s final vision of life as a labyrinth. Life is a labyrinth because there is no necessary connection between cause and effect; because crime is dissociated from accountability and punishment; because what happened can never be ascertained and human knowledge consists only of a maze of conflicting, or overlapping, versions. The center of the existential labyrinth is death, and the exit, the belief in an after-life, is no more real than the belief in aliens. The labyrinth is an inherently ambiguous construct. Its structural attributes of doubling, recursion and inextricability yield a wealth of ontological and epistemological implications. Traditionally used as an emblem of overt complexity concealing underlying order and symmetry, the maze may aptly illustrate the tacit premises of the analytic detective genre. But this purport of the maze symbolism is ironically inverted in noir and neo-noir films. As suggested by its title, the Coen Brothers’ movie is marked by absence, and the absence of the man who wasn’t there evokes a more disturbing void. That void is the center of the existential labyrinth. References Auster, Paul. City of Glass. The New York Trilogy. London and Boston: Faber and Faber, 1990. 1-132. Bordwell, David. Narration in the Fiction Film. Madison: Wisconsin UP, 1985. Cassidy, David. “Quantum Mechanics, 1925-1927.” Werner Heisenberg (1901-1978). American Institute of Physics, 1998. 5 June 2007 http://www.aip.org/history/heisenberg/p08c.htm>. Cazenave, Michel, ed. Encyclopédie des Symboles. Paris: Le Livre de Poche, 1996. Coen, Joel, and Ethan Coen, dirs. The Man Who Wasn’t There. 2001. Doob, Penelope Reed. The Idea of the Labyrinth. Ithaca: Cornell UP, 1992. Hofstadter, Douglas. I Am a Strange Loop. New York: Basic Books, 2007. Holquist, Michael. “Whodunit and Other Questions: Metaphysical Detective Stories in Post-War Fiction.” The Poetics of Murder. Eds. Glenn W. Most and William W. Stowe. New York: Harcourt Brace Jovanovich, 1983. 149-174. Irwin, John T. The Mystery to a Solution: Poe, Borges and the Analytic Detective Story. Baltimore and London: Johns Hopkins UP, 1994. Parandowski, Jan. Mitologia. Warszawa: Czytelnik, 1960. Poe, Edgar Allan. “The Murders in the Rue Morgue.” Edgar Allan Poe: The Complete Illustrated Stories and Poems. London: Chancellor Press, 1994. 103-114. Telotte, J.P. Voices in the Dark: The Narrative Patterns of Film Noir. Urbana: Illinois UP, 1989. Citation reference for this article MLA Style Shiloh, Ilana. "A Vision of Complex Symmetry: The Labyrinth in The Man Who Wasn’t There." M/C Journal 10.3 (2007). echo date('d M. Y'); ?> <http://journal.media-culture.org.au/0706/09-shiloh.php>. APA Style Shiloh, I. (Jun. 2007) "A Vision of Complex Symmetry: The Labyrinth in The Man Who Wasn’t There," M/C Journal, 10(3). Retrieved echo date('d M. Y'); ?> from <http://journal.media-culture.org.au/0706/09-shiloh.php>.

In January of 1908 H. Addington Bruce, a writer for the North American Review, observed that "On every street, at every corner, we meet the neurasthenics" (qtd. in Lears, 50). "Discovered" by the neurologist George M. Beard in 1880, neurasthenia was a nervous disorder characterized by a "lack of nerve force" and comprised of a host of neuroses clustered around an overall paralysis of the will. Historian Barbara Will notes that there were "thousands of men and women at the turn of the century who claimed to be ‘neurasthenics,’" among them Theodore Roosevelt, Edith Wharton, William and Henry James, and Beard himself. These neurasthenics had free roam over the American psychiatric landscape from the date of Beard’s diagnosis until the 1920s, when more accurate diagnostic tools began to subdivide the nearly uninterpretably wide variety of symptoms falling under the rubric of "neurasthenic." By then, however, nearly every educated American had suffered from (or known someone who had) the debilitating "disease"--including Willa Cather, who in The Professor’s House would challenge her readers to acknowledge and engage with the cultural phenomenon of neurasthenia. Cultural historian T.J. Jackson Lears, long a student of neurasthenia, defines it as an "immobilizing, self-punishing depression" stemming from "endless self-analysis" and "morbid introspection" (47, 49). What is especially interesting about the disease, for Lears and other scholars, is that it is a culture-bound syndrome, predicated not upon individual experience, but upon the cultural and economic forces at play during the late nineteenth century. Barbara Will writes that neurasthenia was "double-edged": "a debilitating disease and [...] the very condition of the modern American subject" (88). Interestingly, George Beard attributed neurasthenia to the changes wracking his culture: Neurasthenia is the direct result of the five great changes of modernity: steam power, the periodical press, the telegraph, the sciences, and the mental activity of women. (qtd. in Will, 94) For Beard, neurasthenia was a peculiarly modern disease, the result of industrialization and of the ever-quickening pace of commercial and intellectual life. Jackson Lears takes Beard’s attribution a step further, explaining that "as larger frameworks of meaning weakened, introspection focused on the self alone and became ‘morbid’" (49). These frameworks of meaning--religious, political, psychosexual--were under steady assault in Beard’s time from commodifying and secularizing movements in America. Self-scrutiny, formerly yoked to Protestant salvation (and guilt), became more insular and isolating, resulting in the ultimate modern malady, neurasthenia. While Willa Cather may have inherited Beard’s and her culture’s assumptions of illness, it ultimately appears that Cather’s depiction of neurasthenia is a highly vexed one, both sympathetic and troubled, reflecting a deep knowledge of the condition and an ongoing struggle with the rationalization of scientific psychology. As an intellectual, she was uniquely positioned to both suffer from the forces shaping the new disease and to study them with a critical eye. Godfrey St. Peter, the anxious protagonist of The Professor’s House, becomes then a character that readers of Cather’s day would recognize as a neurasthenic: a "brain-worker," hard-charging and introspective, and lacking in what Beard would call "nerve force," the psychological stoutness needed to withstand modernity’s assault on the self. Moreover, St. Peter is not a lone sufferer, but is instead emblematic of a culture-wide affliction--part of a larger polity constantly driven to newer heights of production, consumption, and subsequent affliction. Jackson Lears theorizes that "neurasthenia was a product of overcivilization" (51), of consumer culture and endemic commodification. Beard himself characterized neurasthenia as an "American disease," a malady integral to the rationalizing, industrializing American economy (31). Cather reinforces the neurasthenic’s exhaustion and inadequacy as St. Peter comes across his wife flirting with Louis Marsellus, prompting the professor to wonder, "Beaux-fils, apparently, were meant by Providence to take the husband’s place when husbands had ceased to be lovers" (160). Not only does this point to the sexual inadequacy and listlessness characteristic of neurasthenia, but the diction here reinforces the modus operandi of the commodity culture--when an old model is used up, it is simply replaced by a newer, better model. Interestingly, Cather’s language itself often mirrors Beard’s. St. Peter at one point exclaims to Lillian, in a beatific reverie: "I was thinking [...] about Euripides; how, when he was an old man, he went and lived in a cave by the sea, and it was thought queer, at the time. It seems that houses had become insupportable to him" (156). The Professor’s "symptom of hopelessness," Beard might explain, "appears to be similar to that of morbid fear--an instinctive consciousness of inadequacy for the task before us. We are hopeless because our nerve force is so reduced that the mere holding on to life seems to be a burden too heavy for us" (49). Both Beard and Cather, then, zero in on the crushing weight of modern life for the neurasthenic. The Professor here aches for rest and isolation--he, in Beard’s language, "fears society," prompting Lillian to fear that he is "’becoming lonely and inhuman’" (162). This neurasthenic craving for isolation becomes much more profound in Book III of the novel, when St. Peter is almost completely estranged from his family. Although he feels he loves them, he "could not live with his family again" upon their return from Europe (274). "Falling out, for him, seemed to mean falling out of all domestic and social relations, out of his place in the human family, indeed" (275). St. Peter’s estrangement is not only with his family (an estrangement perhaps rationalized by the grasping or otherwise distasteful St. Peter clan), but with the human family. It is a solipsistic retreat from contact and effort, the neurasthenic’s revulsion for work of any kind. Neurasthenia, if left untreated, can become deadly. Beard explains: "A certain amount of nerve strength is necessary to supply the courage requisite for simple existence. Abstaining from dying demands a degree of force" (49). Compare this to the scene near the end of the narrative in which St. Peter, sleeping on the couch, nearly dies: When St. Peter at last awoke, the room was pitch-black and full of gas. He was cold and numb, felt sick and rather dazed. The long-anticipated coincidence had happened, he realized. The storm had blown the stove out and the window shut. The thing to do was to get up and open the window. But suppose he did not get up--? How far was a man required to exert himself against accident? [...] He hadn’t lifted his hand against himself--was he required to lift it for himself? (276) This classic scene, variously read as a suicide attempt or as an accident, can be understood as the neurasthenic’s complete collapse. The Professor’s decision is made solely in terms of effort; this is not a moral or philosophical decision, but one of physiological capacity. He is unwilling to "exert" the energy necessary to save himself, unwilling to "lift his hand" either for or against himself. Here is the prototypical neurasthenic fatigue--almost suicidal, but ultimately too passive and weak to even take that course of action. Accidental gassing is a supremely logical death for the neurasthenic. This appropriateness is reinforced by the Professor at the end of the narrative, when he remembers his near death: Yet when he was confronted by accidental extinction, he had felt no will to resist, but had let chance take its way, as it had done with him so often. He did not remember springing up from the couch, though he did remember a crisis, a moment of acute, agonized strangulation. (282) Again, the Professor is a passive figure, couch-ridden, subject to the whims of chance and his own lack of nerve. He is saved by Augusta, though, and does somehow manage to carry on with his life, if in a diminished way. We cannot accredit his survival to clinical treatment of neurasthenia, but perhaps his vicarious experience on the mesa with Tom Outland can account for his fortitude. Treatment of neurasthenia, according to Tom Lutz, "aimed at a reconstitution of the subject in terms of gender roles" (32). S. Weir Mitchell, a leading psychiatrist of the day, treated many notable neurasthenics. Female patients, in line with turn-of-the-century models of female decorum, were prescribed bed rest for up to several months, and were prohibited from all activity and visitors. (Charlotte Perkins Gilman’s "The Yellow Wallpaper" has long been considered a critique of Mitchell’s "rest cure" for women. Interestingly, St. Peter’s old study has yellow wall paper.) Treatments for men, again consistent with contemporary gender roles, emphasized vigorous exercise, often in natural settings: Theodore Roosevelt, Thomas Eakins, Frederic Remington, and Owen Wister were all sent to the Dakotas for rough-riding exercise cures [...] Henry James was sent to hike in the Alps, and William James continued to prescribe vigorous mountain hikes for himself[.] (32) Depleted of "nerve force," male neurasthenics were admonished to replenish their reserves in rugged, survivalist outdoor settings. Beard documents the treatment of one "Mr. O," whom, worn out by "labor necessitated by scholarly pursuits," is afflicted by a settled melancholia, associated with a morbid and utterly baseless fear of financial ruin...he was as easily exhausted physically as mentally. He possessed no reserve force, and gave out utterly whenever he attempted to overstep the bounds of the most ordinary effort. [As part of his treatment] He journeyed to the West, visited the Yellowstone region, and at San Francisco took steamer for China [...] and returned a well man, nor has he since relapsed into his former condition. (139-41) Beard’s characterization of "Mr. O" is fascinating in several ways. First, he is the prototypical neurasthenic--worn out, depressed, full of "baseless" fears. More interestingly, for the purposes of this study, part of the patient’s cure is effected in the "Yellowstone region," which would ultimately be made a national park by neurasthenic outdoors man Theodore Roosevelt. This natural space, hewn from the wilds of the American frontier, is a prototypical refuge for nervous "brain-workers" in need of rejuvenation. This approach to treatment is especially intriguing given the setting of Book II of The Professor's House: an isolated Mesa in the Southwest. While St. Peter himself doesn’t undertake an exercise cure, "Tom Outland’s Story" does mimic the form and rhetoric of treatment for male neurasthenics, possibly accounting for the odd narrative structure of the novel. Cather, then, not only acknowledges the cultural phenomenon of neurasthenia, but incorporates it in the structure of the text. Outland’s experience on the mesa (mediated, we must remember, by the neurasthenic St. Peter, who relates the tale) is consistent with what Jackson Lears has termed the "cult of strenuousity" prevalent in the late nineteenth and early twentieth century. According to Lears neurasthenics often sought refuge in "a vitalistic cult of energy and process; and a parallel recovery of the primal, irrational sources in the human psyche, forces which had been obscured by the evasive banality of modern culture" (57). Outland, discovering the mesa valley for the first time, explains that the air there "made my mouth and nostrils smart like charged water, seemed to go to my head a little and produce a kind of exaltation" (200). Like Roosevelt and other devotees of the exercise cure, Outland (and St. Peter, via the mediation) is re-"charged" by the primal essence of the mesa. The Professor later laments, "his great drawback was [...] the fact that he had not spent his youth in the great dazzling South-west country which was the scene of his explorers’ adventures" (258). Interestingly, Outland’s rejuvenation on the mesa is cast by Cather in hyperbolically masculine terms. The notoriously phallic central tower of the cliff city, for instance, may serve as a metaphor for recovered sexual potency: It was beautifully proportioned, that tower, swelling out to a larger girth a little above the base, then growing slender again. There was something symmetrical and powerful about the swell of the masonry. The tower was the fine thing that held all the jumble of houses together and made them mean something. It was red in color, even on that grey day. (201) Neurasthenics embraced "premodern symbols as alternatives to the vagueness of liberal Protestantism or the sterility of nineteenth-century positivism" (Lears xiii). The tower stands in striking contrast to St. Peter’s sexless marriage with Lillian, potentially reviving the Professor’s sagging neurasthenic libido. The tower also serves, in Outland’s mind, to forge meaning out of the seemingly random cluster of houses: "The notion struck me like a rifle ball that this mesa had once been like a bee-hive; it was full of little cluff-hung villages, it had been the home of a powerful tribe" (202). Outland’s discovery, cast in martial terms ("rifle ball"), reinscribes the imperialistic tendencies of the exercise cure and of Tom’s archeological endeavor itself. Tom Lutz notes that the exercise cure, steeped in Rooseveltian rhetoric, exemplified "a polemic for cultural change, a retraining, presented as a ‘return’ to heroic, natural, and manly values...The paternalism of Roosevelt’s appeal made sense against the same understanding of role which informed the cures for neurasthenia" (36). Outland seems to unconsciously concur, reflecting that "Wherever humanity has made that hardest of all starts and lifted itself out of mere brutality, is a sacred spot" (220-1). While Outland does have genuine admiration for the tribe, his language is almost always couched in terms of martial struggle, of striving against implacable odds. On a related note, George Kennan, writing in a 1908 McClure’s Magazine edited by Cather, proposed that rising suicide rates among the educated by cured by a "cultivation of what may be called the heroic spirit" (228). Cather was surely aware of this masculinizing, imperializing response to neurasthenic ennui--her poem, "Prairie Dawn," appears at the end of Kennan’s article! Outland’s excavation of Cliff City and its remains subsequently becomes an imperializing gesture, in spite of his respect for the culture. What does this mean, though, for a neurasthenic reading of The Professor’s House? In part, it acknowledges Cather’s response to and incorporation of a cultural phenomenon into the text in question. Additionally, it serves to clarify Cather’s critique of masculinist American culture and of the gendered treatment of neurasthenia. This critique is exemplified by Cather’s depiction of "Mother Eve": "Her mouth was open as if she were screaming, and her face, through all those years, had kept a look of terrible agony" (214-15). Not only does this harrowing image undermine Outland’s romantic depiction of the tribe, but it points to the moral bankruptcy of the cult of strenuousity. It is easy, Cather seems to argue, for Roosevelt and his ilk to "rough it" in the wilderness to regain their vigor, but the "real-life" wilderness experience is a far harsher and more dangerous prospect. Cather ultimately does not romanticize the mesa--she problematizes it as a site for neurasthenic recovery. More importantly, this vexed reading of the treatment suggests a vexed reading of neurasthenia and of "American Nervousness" itself. Ultimately, in spite of his best efforts to recover the intense experience of his past and of Tom Outland’s, St. Peter fails. As Mathias Schubnell explains, Cather’s "central character is trapped between a modern urban civilization to which he belongs against his will, and a pastoral, earth-bound world he yearns for but cannot regain" (97). This paradox is exemplified by the Professor’s early lament to Lillian, "’it’s been a mistake, our having a family and writing histories and getting middle-aged. We should have been picturesquely shipwrecked together when we were young’" (94). The reader, of course, recognizes the absurdity of this image--an absurdity strongly reinforced by the image of the deceased "Mother Eve" figure. These overcivilized men, Cather suggests, have no conception of what intense experience might be. That experience has been replaced, the Professor explains, by rationalizing, industrializing forces in American culture: Science hasn’t given us any new amazements, except of the superficial kind we get from witnessing dexterity and sleight-of-hand. It hasn’t given us any richer pleasures...nor any new sins--not one! Indeed, it has taken our old ones away. It’s the laboratory, not the Lamb of God, that taketh away the sins of the world. You’ll agree there is not much thrill about a physiological sin...I don’t think you help people by making their conduct of no importance--you impoverish them. (68) St. Peter, the neurasthenic humanist, gets here at the heart of his (and America’s) sickness--it has replaced the numinous and the sacred with the banal and the profane. The disorder he suffers from, once termed a sin, has become "physiological," as has his soul. It is worthwhile to contrast the Professor’s lament with Beard’s supremely rational boast: "It would seem, indeed, that diseases which are here described represent a certain amount of force in the body which, if our knowledge of physiological chemistry were more precise, might be measured in units" (115). The banal, utterly practical measuring of depression, of melancholia, of humanity’s every whim and caprice, Cather suggests, has dulled the luster of human existence. The Professor’s tub, then, becomes an emblem of the relentless stripping away of all that is meaningful and real in Cather’s culture: "Many a night, after blowing out his study lamp, he had leaped into that tub, clad in his pyjamas, to give it another coat of some one of the many paints that were advertised to behave like porcelain, but didn’t" (12). Porcelain here becomes the religion or art which once sustained the race, replaced by the false claims of science. The Professor, though, seems too world-weary, too embittered to actually turn to religious faith. Perhaps God is dead in his world, eliminated by the Faustian quest for scientific knowledge. "His career, his wife, his family, were not his life at all, but a chain of events which had happened to him" (264). Godfrey St. Peter, like the rest of the neurasthenics, is doomed to an incurable sickness, victim of a spiritual epidemic which, Cather suggests, will not soon run its course. References Beard, George M. A Practical Treatise on Nervous Exhaustion (Neurasthenia). A. D. Rockwell, ed. New York: E.B. Treat & Company, 1905. Cather, Willa. The Professor’s House. London: Virago, 1981. Fisher-Wirth, Ann. "Dispossession and Redemption in the Novels of Willa Cather." Cather Studies 1 (1990): 36-54. Harvey, Sally Peltier. Predefining the American Dream: The Novels of Willa Cather. Toronto: Associated UP, 1995. Hilgart, John. "Death Comes for the Aesthete: Commodity Culture and the Artifact in Cather’s The Professor’s House." Studies in the Novel 30:3 (Fall 1998): 377-404. Kennan, George. McClure’s Magazine 30:2 (June 1908): 218-228. Lears, T.J. Jackson. No Place of Grace: Antimodernism and the Transformation American Culture. New York: Pantheon Books, 1981. Lutz, Tom. American Nervousness, 1903: An Anecdotal History. Ithaca: Cornell UP, 1991. Schubnell, Matthias. "The Decline of America: Willa Cather’s Spenglerian Vision in The Professor’s House." Cather Studies 2 (1993): 92-117. Stouck, David. "Willa Cather and The Professor’s House: ‘Letting Go with the Heart." Western American Literature 7 (1972): 13-24. Will, Barbara. "Nervous Systems, 1880-1915." American Bodies: Cultural Histories of the Physique. Tim Armstrong, ed. New York: NYUP, 1996. 86-100. Links The Willa Cather Electronic Archive The Mower's Tree (Cather Colloquium Newsletter) George Beard information

University of Technology, Sydney. Faculty of Information Technology.
Over the last few years Peer-to-Peer (P2P) systems have emerged as highly attractive systems supporting many useful large-scale applications and services. They allow the exploitation of enormous untapped resources (such as idle processing cycles, storage, and bandwidth) available at Internet-connected devices, which were previously considered incapable of providing services to others. Participating nodes (peers) form an overlay network and communicate with each other without being controlled by a central authority. The structures and routing decisions of the most current P2P networks often do not correlate with the Internet infrastructure. In doing so, the tasks of overlay construction and routing become less complicated however, this results in high end-to-end delay for the P2P applications. As a consequence, the P2P networks may not be able to provide stringent Quality of Service (QoS) requirements for a new generation of P2P applications, and thus limit their benefits for the end users. Moreover, the infrastructure ignorance means P2P systems waste Internet resources by adding more than they should to the Internet traffic. This leads to the increase in Internet access costs substantially, and in turn the P2P systems do not scale well. The thesis presents a novel architecture for developing efficient P2P systems, and new schemes for constructing infrastructure-aware overlay networks. The main objective is first, to overcome the disparity between the overlay and Internet structures in order to maximize the use of network resources and reduce the overlay delay to the P2P applications; second, to provide efficient communication for P2P systems enabling deployment of any P2P applications while preserving decentralized, self-organizing and self-maintaining characteristics for the systems. To achieve these goals, we firstly developed Geographically Longest Prefix Matching (Geo-LPM) and Geographical Partitioning (Geo-Partitioning) schemes to cluster nodes that are close to each other in terms of network latency and network membership, and to determine links between neighboring clusters respectively. The developed schemes are efficient, generate low overhead, and help to produce excellent physically/infrastructure-aware overlay networks. Their distinctive features are self-organization, self-maintenance, and decentralization, which make them suitable to work in a P2P environment. Secondly we propose a novel architecture, called a physically-aware reference model (PARM) that captures desirable features for P2P systems by resolving major functional P2P system problems efficiently in a layered structure. For example, the application routing layer of PARM deals with routing inefficiency, meanwhile the infrastructure unawareness is resolved at the overlay network layer. We develop a useful P2P application, called a Peer Name Service (PNS) that interprets node names into their current IP addresses for any Internet-connected devices. Using the overlay networks, the PNS can support devices, which could be unreachable via the Domain Name Server (DNS), and mobile devices on-the-move without prior setup requirement in a distributed and timely fashion. Finally, to validate the whole concept of PARM, we simulate the PNS and a file transfer to a mobile node at the top layer of PARM, the P2P application layer. Since the PNS is sensitive to delay, it would be useful to evaluate the impacts of overlay delay factor and PARM on the performance of P2P applications. The simulation results show that the performance of the PARM-based applications is significantly improved while achieving decentralized and self-organizing features. The results also indicate that PARM can be a recommended reference model for developing scalable and efficient P2P systems.

University of Technology, Sydney. Faculty of Information Technology.
Over the last few years Peer-to-Peer (P2P) systems have emerged as highly attractive systems supporting many useful large-scale applications and services. They allow the exploitation of enormous untapped resources (such as idle processing cycles, storage, and bandwidth) available at Internet-connected devices, which were previously considered incapable of providing services to others. Participating nodes (peers) form an overlay network and communicate with each other without being controlled by a central authority. The structures and routing decisions of the most current P2P networks often do not correlate with the Internet infrastructure. In doing so, the tasks of overlay construction and routing become less complicated however, this results in high end-to-end delay for the P2P applications. As a consequence, the P2P networks may not be able to provide stringent Quality of Service (QoS) requirements for a new generation of P2P applications, and thus limit their benefits for the end users. Moreover, the infrastructure ignorance means P2P systems waste Internet resources by adding more than they should to the Internet traffic. This leads to the increase in Internet access costs substantially, and in turn the P2P systems do not scale well. The thesis presents a novel architecture for developing efficient P2P systems, and new schemes for constructing infrastructure-aware overlay networks. The main objective is first, to overcome the disparity between the overlay and Internet structures in order to maximize the use of network resources and reduce the overlay delay to the P2P applications; second, to provide efficient communication for P2P systems enabling deployment of any P2P applications while preserving decentralized, self-organizing and self-maintaining characteristics for the systems. To achieve these goals, we firstly developed Geographically Longest Prefix Matching (Geo-LPM) and Geographical Partitioning (Geo-Partitioning) schemes to cluster nodes that are close to each other in terms of network latency and network membership, and to determine links between neighboring clusters respectively. The developed schemes are efficient, generate low overhead, and help to produce excellent physically/infrastructure-aware overlay networks. Their distinctive features are self-organization, self-maintenance, and decentralization, which make them suitable to work in a P2P environment. Secondly we propose a novel architecture, called a physically-aware reference model (PARM) that captures desirable features for P2P systems by resolving major functional P2P system problems efficiently in a layered structure. For example, the application routing layer of PARM deals with routing inefficiency, meanwhile the infrastructure unawareness is resolved at the overlay network layer. We develop a useful P2P application, called a Peer Name Service (PNS) that interprets node names into their current IP addresses for any Internet-connected devices. Using the overlay networks, the PNS can support devices, which could be unreachable via the Domain Name Server (DNS), and mobile devices on-the-move without prior setup requirement in a distributed and timely fashion. Finally, to validate the whole concept of PARM, we simulate the PNS and a file transfer to a mobile node at the top layer of PARM, the P2P application layer. Since the PNS is sensitive to delay, it would be useful to evaluate the impacts of overlay delay factor and PARM on the performance of P2P applications. The simulation results show that the performance of the PARM-based applications is significantly improved while achieving decentralized and self-organizing features. The results also indicate that PARM can be a recommended reference model for developing scalable and efficient P2P systems.