Image Restoration

This book represents a sample of recent contributions of researchers all around the world in the field of image restoration. The book consists of 15 chapters organized in three main sections (Theory, Applications, Interdisciplinarity). Topics cover some different aspects of the theory of image restoration, but this book is also an occasion to highlight some new topics of research related to the emergence of some original imaging devices. From this arise some real challenging problems related to image reconstruction/restoration that open the way to some new fundamental scientific questions closely related with the world we interact with

Spatio-temporal Principles of Infra-slow Brain Activity

In the study of systems where basic laws have eluded us, as is largely the case in neuroscience, the simplest approach to progress might be to ask: what are the biggest, most noticeable things the system does when left alone? Without any perturbations or fine dissections, can regularities be found in the basic operations of the system as a whole? In the case of the brain, it turns out that there is an amazing amount of activity even in the absence of explicit environmental inputs or outputs. We call this spontaneous, or resting state, brain activity. Prior work has shown that spontaneous brain activity is dominated by very low frequencies: the biggest changes in brain activity happen relatively slowly, over 10’s-100’s of seconds. Moreover, this very slow activity of the brain is quite metabolically expensive. The brain accounts for 2% of body mass in an adult, but requires 20% of basal metabolic expenditure. Remarkably, the energy required to sustain brain function is nearly constant whether one is engaged in a demanding mental task or simply out to lunch. Furthermore, work over the past three decades has established that the spontaneous activities of the brain are not random, but instead organized into specific patterns, most often characterized by correlations within large brain systems. Yet, how do these correlations arise, and does spontaneous activity support slow signaling within and between neural systems? In this thesis, we approach these questions by providing a comprehensive analysis of the temporal structure of very low frequency spontaneous activity. Specifically, we focus on the direction of travel in low frequency activity, measured using resting state fMRI in humans, but also using electrophysiological techniques in humans and mice, and optical calcium imaging in mice. Our temporal analyses reveal heretofore unknown regularities in the way slow signals move through the brain. We further find that very low frequency activity behaves differently than faster frequencies, that it travels through distinct layers of the cortex, and that its travel patterns give rise to correlations within networks. We also demonstrate that the travel patterns of very low frequency activity are highly dependent on the state of the brain, especially the difference between wake and sleep states. Taken together, the findings in this thesis offer a glimpse into the principles that govern brain activity

From insights to innovations : data mining, visualization, and user interfaces

This thesis is about data mining (DM) and visualization methods for gaining insight into multidimensional data. Novel, exploratory data analysis tools and adaptive user interfaces are developed by tailoring and combining existing DM and visualization methods in order to advance in different applications. The thesis presents new visual data mining (VDM) methods that are also implemented in software toolboxes and applied to industrial and biomedical signals: First, we propose a method that has been applied to investigating industrial process data. The self-organizing map (SOM) is combined with scatterplots using the traditional color linking or interactive brushing. The original contribution is to apply color linked or brushed scatterplots and the SOM to visually survey local dependencies between a pair of attributes in different parts of the SOM. Clusters can be visualized on a SOM with different colors, and we also present how a color coding can be automatically obtained by using a proximity preserving projection of the SOM model vectors. Second, we present a new method for an (interactive) visualization of cluster structures in a SOM. By using a contraction model, the regular grid of a SOM visualization is smoothly changed toward a presentation that shows better the proximities in the data space. Third, we propose a novel VDM method for investigating the reliability of estimates resulting from a stochastic independent component analysis (ICA) algorithm. The method can be extended also to other problems of similar kind. As a benchmarking task, we rank independent components estimated on a biomedical data set recorded from the brain and gain a reasonable result. We also utilize DM and visualization for mobile-awareness and personalization. We explore how to infer information about the usage context from features that are derived from sensory signals. The signals originate from a mobile phone with on-board sensors for ambient physical conditions. In previous studies, the signals are transformed into descriptive (fuzzy or binary) context features. In this thesis, we present how the features can be transformed into higher-level patterns, contexts, by rather simple statistical methods: we propose and test using minimum-variance cost time series segmentation, ICA, and principal component analysis (PCA) for this purpose. Both time-series segmentation and PCA revealed meaningful contexts from the features in a visual data exploration. We also present a novel type of adaptive soft keyboard where the aim is to obtain an ergonomically better, more comfortable keyboard. The method starts from some conventional keypad layout, but it gradually shifts the keys into new positions according to the user's grasp and typing pattern. Related to the applications, we present two algorithms that can be used in a general context: First, we describe a binary mixing model for independent binary sources. The model resembles the ordinary ICA model, but the summation is replaced by the Boolean operator OR and the multiplication by AND. We propose a new, heuristic method for estimating the binary mixing matrix and analyze its performance experimentally. The method works for signals that are sparse enough. We also discuss differences on the results when using different objective functions in the FastICA estimation algorithm. Second, we propose "global iterative replacement" (GIR), a novel, greedy variant of a merge-split segmentation method. Its performance compares favorably to that of the traditional top-down binary split segmentation algorithm.reviewe

Phenomenologies of Mars: Exploring Methods for Reading the Scientific Planetext Of Kim Stanley Robinson’s Mars Trilogy

In 2013, The New Yorker Magazine called Kim Stanley Robinson ‘one of the greatest living science-fiction writers’. And in 2008, Time Magazine named him a ‘hero of the environment.’[1] Yet, no lengthy study has yet been attempted on any of his fiction. This thesis aims to redress this absence with a long-form reading of one of the high peaks of his achievement: the Mars Trilogy. It considers that what I am calling the ‘planetext’ (or planet-text) is a vital narrative space. It assumes the perspectival form in which the Trilogy is told is crucial to understanding how its planetexts are read. The several viewpoints in the Trilogy comprise the several attempts of this thesis toward understanding not only how the planet is used in the novels, but also how it arranges and functions according to textual principles of readability. My several readings adopt the scientific bases of each of these viewpoints, and develops a sense of the way different characters experience the planet around them as either enabled by science, or confounded by it. ‘Planetext’ is therefore a useful neologism for interpreting how such a vast and multidimensional site as Mars is, or is not, encountered through these sciences. Understanding the planetext of Mars is therefore a phenomenological task, with the requirement of reading how each character is able, or unable, to experience and comprehend their experiences. A sense of the phenomenologies of Mars means this thesis must take the approach of seeing how different sciences yield different phenomenologies, and different experiences of the planet. By calling Mars a planetext, this thesis investigates the ways in which language, writing, and textuality participate in building the planet of the Trilogy, treating writing as a coefficient of terraforming. Understood as a kind of planetography, or planetary writing, the planetext (or host of planetexts) foregrounds the written-ness of the Martian space in Robinson’s Trilogy. The planetextual space of the novels shapes a variety of readerly paths through the narrative, which are in turn adopted. As a long study, this thesis understands the planet as a sizeable arena, which challenges the view any one reading can give of it. Acknowledging this as a limitation, its four chapters focus only on four characters, aiming to supplement an overview style of reading the Trilogy with a series of close readings. Understanding the textual status of the planet means paying specific attention to how characters either find meaningful access to the planet, or fail to find any. For Ann Clayborne, a geologist who wants to keep Mars uncontaminated and un-colonized, the planetext forms itself as a zone of différance, in which the task of interpreting the non-living planet must coincide with her resistance to the terraforming project. With Michel Duval, the Martian psychiatrist, readability is itself questioned as he attempts to overcome his depression and homesickness. For Saxifrage Russell, one of the chief terraformers, a discussion over scientific method takes the path of this thesis away from the troubling and compromised planetexts of Ann and Michel, toward how textual meaning is enabled and opened. With Hiroko Ai, a final theorization of what I call viridical force is proposed as a planetextual function, based around the Trilogy’s mention of viriditas and Jacques Derrida’s idea of force, to come to terms with how the planet makes itself available to the reader as expansive, rich in possible meaning, and always arranging itself around the reader. Between the opening of the planetext and its equivocations, this thesis charts its course. [1] Tim Kreider, ‘Our Greatest Living Novelist?’ December 12, 2013. The New Yorker Magazine. http://www.newyorker.com/books/page-turner/our-greatest-political-novelist; Oliver Morton, ‘Kim Stanley Robinson: Heroes of the Environment 2008,’ Wednesday September 24, 2008. Time Magazine. http://content.time.com/ time/specials/packages/article/0,28804,1841778_1841779_1841803,00.htm

The reconstruction of virtual cuneiform fragments in an online environment

Reducing the time spent by experts on the process of cuneiform fragment reconstruction means that more time can be spent on the translation and interpretation of the information that the cuneiform fragments contain. Modern computers and ancillary technologies such as 3D printing have the power to simplify the process of cuneiform reconstruction, and open up the field of reconstruction to non-experts through the use of virtual fragments and new reconstruction methods. In order for computers to be effective in this context, it is important to understand the current state of available technology, and to understand the behaviours and strategies of individuals attempting to reconstruct cuneiform fragments. This thesis presents the results of experiments to determine the behaviours and actions of participants reconstructing cuneiform tablets in the real and virtual world, and then assesses tools developed specifically to facilitate the virtual reconstruction process. The thesis also explores the contemporary and historical state of relevant technologies. The results of experiments show several interesting behaviours and strategies that participants use when reconstructing cuneiform fragments. The experiments include an analysis of the ratio between rotation and movement that show a significant difference between the actions of successful and unsuccessful participants, and an unexpected behaviour that the majority of participants adopted to work with the largest fragments first. It was also observed that the areas of the virtual workspace used by successful participants was different from the areas used by unsuccessful participants. The work further contributes to the field of reconstruction through the development of appropriate tools that have been experimentally proved to dramatically increase the number of potential joins that an individual is able to make over period of time

Emergent properties of microbial activity in heterogeneous soil microenvironments:Different research approaches are slowly converging, yet major challenges remain

Over the last 60 years, soil microbiologists have accumulated a wealth of experimental data showing that the usual bulk, macroscopic parameters used to characterize soils (e.g., granulometry, pH, soil organic matter and biomass contents) provide insufficient information to describe quantitatively the activity of soil microorganisms and some of its outcomes, like the emission of greenhouse gases. Clearly, new, more appropriate macroscopic parameters are needed, which reflect better the spatial heterogeneity of soils at the microscale (i.e., the pore scale). For a long time, spectroscopic and microscopic tools were lacking to quantify processes at that scale, but major technological advances over the last 15 years have made suitable equipment available to researchers. In this context, the objective of the present article is to review progress achieved to date in the significant research program that has ensued. This program can be rationalized as a sequence of steps, namely the quantification and modeling of the physical-, (bio)chemical-, and microbiological properties of soils, the integration of these different perspectives into a unified theory, its upscaling to the macroscopic scale, and, eventually, the development of new approaches to measure macroscopic soil characteristics. At this stage, significant progress has been achieved on the physical front, and to a lesser extent on the (bio)chemical one as well, both in terms of experiments and modeling. In terms of microbial aspects, whereas a lot of work has been devoted to the modeling of bacterial and fungal activity in soils at the pore scale, the appropriateness of model assumptions cannot be readily assessed because relevant experimental data are extremely scarce. For the overall research to move forward, it will be crucial to make sure that research on the microbial components of soil systems does not keep lagging behind the work on the physical and (bio)chemical characteristics. Concerning the subsequent steps in the program, very little integration of the various disciplinary perspectives has occurred so far, and, as a result, researchers have not yet been able to tackle the scaling up to the macroscopic level. Many challenges, some of them daunting, remain on the path ahead

Place, Imaginary, Identity: Place Ethnography in Truth or Consequences, New Mexico

Place for me is the locus of desire, writes Lucy Lippard in the opening to Lure of the Local (1997). This research project is about place. Two distinct sets of scholarship on place emerged in the 1970s and the 1990s. A third wave of place scholarship is evident today. Coming initially from geography and anthropology, the study of place is now ubiquitous across fields in history, cultural studies, architecture, planning, health sciences, art and other disciplines. Despite the sustained interest in the study of place, one of the hallmarks of place is the ranging and contested contours of what place means. Place is defined, for the purposes of this study, as a describable location characterized by a shifting confluence of historical, material, political, cultural, economic, built, sensed and imagined qualities. There are three distinct goals in this research project. First, this research project seeks to explore how place has been theorized, imagined, and understood. Second, this research project is an inquiry into how place can be studied. To these ends, I name, define, and refine a method I call place ethnography. Place ethnography is a methodological framework that blends ethnographic and historic research with a range of disciplinary techniques in order to study place. I develop several concepts in this project. These include the idea of a place imaginary, defined as a dominant place perception, the concept of an historical vacancy, the perception of an emptiness in the historical fabric and settlement of a place or region, a particular kind of place imaginary and topofabulas, a concept that describes a historically untenable place narratives that are accepted as historical truth and are place defining. The third goal of this research project is to apply place ethnographic methods to a specific place. To these ends, this research project recounts a place ethnographic study of a small town named Truth or Consequences, New Mexico undertaken from July 2012- August 2014

Democracy and the Media: The Year in C-SPAN Archives Research, Volume 7

Volume 7 of The Year in C-SPAN Archives Research series focuses on the relationship between democracy and the media. Using the extensive collection of the C-SPAN Video Library, chapters cover Trump political rallies, congressional references of late-night comedy, responses of African American congresswomen to COVID-19 bills, and congressional attacks on the media through floor speeches in the House of Representatives and Senate. The C-SPAN Video Library is unique because there is no other research collection that is based on video research of contemporary politics. Methodologically distinctive, much of the research uses new techniques to analyze video, text, and spoken words of political leaders. No other book examines such a wide range of topics―from immigration to climate change to race relations―using video as the basis for research

Colour and Colorimetry Multidisciplinary Contributions Vol. XIb

It is well known that the subject of colour has an impact on a range of disciplines. Colour has been studied in depth for many centuries, and as well as contributing to theoretical and scientific knowledge, there have been significant developments in applied colour research, which has many implications for the wider socio-economic community. At the 7th Convention of Colorimetry in Parma, on the 1st October 2004, as an evolution of the previous SIOF Group of Colorimetry and Reflectoscopy founded in 1995, the "Gruppo del Colore" was established. The objective was to encourage multi and interdisciplinary collaboration and networking between people in Italy that addresses problems and issues on colour and illumination from a professional, cultural and scientific point of view. On the 16th of September 2011 in Rome, in occasion of the VII Color Conference, the members assembly decided to vote for the autonomy of the group. The autonomy of the Association has been achieved in early 2012. These are the proceedings of the English sessions of the XI Conferenza del Colore