272 research outputs found
1) False Creek Flats: What About the Others? 2) South Flatz: Community That Renovictz
No full textThe ECUAD DONOR MAP series is a zine and two posters connecting some of the biggest donors for our new campus to local gentrification and other Place-based violence. The series is by Mickey Vescera and Mickey Morgan for FALL 2020 SOCS-302 Ethics of Representation. Some questions we contemplated in the construction of these maps, and throughout our scholarship at Emily Carr University of Art + Design: How did we get here in this shiny new campus “owning” the Land? Who are our donors that paid for this? Where do we find them in our school and in our neighbourhoods? How much of the “property” in East Van do they own? What other capital investments do they hold? Who does our being here serve? And ultimately, how can we disrupt this built-in power imbalance to be better neighbours?
Sources and Resources: https://docs.google.com/document/d/e/2PACX-1vQvQDAIqTsATIoPqf257eXmXffUv9YuKilDGC0R_kTsgPkE2qWMHnTqInKrzJ_GUIxLl-j3wtzdXE2Z/pub?fbclid=IwAR2gyEUjI6fh4Yvceebo5GbSx5jh0lpnUR9r6BQaGDpEC3tQD4lV4QDXCZ
Fluor-elbaite, lepidolite and Ta--Nb oxides from a pegmatite of the 3000 Ma Sinceni Pluton, Swaziland: evidence for lithium--cesium--tantalum (LCT) pegmatites in the Mesoarchean
No full textMineral evolution is concerned with the timing of mineral occurrences, such as the earliest reported occurrences in the geologic record. Minerals containing essential Li have not been reported from rocks older than ca. 3000 Ma, thus the lithian tourmaline (fluor-elbaite) and mica (lepidolite) assemblage from a pegmatite near Zishineni associated with the ca. 3000 Ma Sinceni Pluton presents unusual interest. Fluor-elbaite (0.75–0.98 F per formula unit) forms green crystals up to 50 mm long. Spindle stage measurements give ω = 1.652(1), ε = 1.627(1) (589.3 nm). Optical absorption spectroscopy shows Fe and Mn are divalent; infra-red spectroscopy demonstrates the presence of Li and indicates the presence of (OH) at both the (OH) sites. Electron microprobe analysis of 330 points on several prisms, the largest of which is zoned in Fe and Ca, gives the following average and standard deviations in wt%: SiO2 37.29 (0.26), TiO2 0.05 (0.05), Al2O3 38.14 (0.35), Cr2O3 0 (0.02), MgO 0.02 (0.01), MnO 3.57 (0.25), FeO 2.48 (0.60), Na2O 2.48 (0.09), K2O 0.03 (0.12), CaO 0.77 (0.21), F 1.80 (0.11) wt%; Cl 0 (0.01). Nuclear reaction analyses gave Li2O 0.91 (0.04) and B2O3 10.55 (0.45). The empirical formula of fluor-elbaite was determined by integrating crystal-chemical data from electron microprobe analysis, nuclear reaction analysis, crystal structure refinement using X-ray diffraction, infra-red and optical absorption spectroscopy: X(□0.09Na0.77K0.01Ca0.13)Σ1.00Y(□0.35Li0.59Mn 2+ 0.49 Fe 2+ 0.33 Mn0.492+Fe0.332+Al1.23Ti0.01)Σ3.00Al6(Si6O18)(BO3)3O3(OH)3O1[F0.92(OH)0.08]Σ1.00. The crystal structure of fluor-elbaite was refined to statistical indices R1 for 1454 reflections ∼2% using MoKα X-ray intensity data. Structural data confirm the presence of significant vacancies at the Y site. Micas include lepidolite in flakes several millimeters across that are veined and overgrown by fine-grained muscovite. Silica and (FeO + MnO) increase, and Al decreases with F, all giving tight linear fits for both micas taken together, suggesting both micas can be regarded as interstratified muscovite and lithium mica consisting of 35.2 wt% masutomilite containing nearly equal amounts of Mn and Fe, 52.8 wt% polylithionite and 11.9 wt% trilithionite. Muscovite and lepidolite contain Ta, hübnerite(?) and a possible Pb-bearing microlite (Ta > Nb). The oxides, together with the muscovite, are interpreted to be related to later hydrothermal reworking of the primary lepidolite–fluor-elbaite assemblage. Given the 2990 ± 43 Ma Rb–Sr isochron and 3074 ± 4 Ma evaporation Pb–Pb ages reported for the Sinceni Pluton and Rb/Sr mineral ages ranging from 2906 ± 31 Ma to 3072 ± 33 Ma reported for the pegmatites, the fluor-elbaite–cesian lepidolite–fluorcalciomicrolite-bearing pegmatite is the first reported occurrence of a lithian tourmaline and lepidolite in the geologic record, as well as one of the two earliest known examples of the lithium–cesium–tantalum (LCT) family of pegmatites. The Sinceni magma is most plausibly derived from a metasedimentary source by intrusion of hot mantle melts into the crust from below, thereby indicating that a “mature” continental crust existed in the Kaapvaal craton at ca. 3000 Ma
Mineralogy and geochemistry in the lung /by Anne Elizabeth Taunton.
No full textGeology is important in human health. Specifically, identifying and quantifying both biogenic and abiotic (i.e., those minerals that are inhaled or ingested) minerals and the reactions of those minerals in the body are two areas where mineralogists and geochemists can contribute to understanding the dynamics between solids and fluids in the body. This dissertation describes research on the theoretical and experimental geochemistry of the lung environment, the mineralogy of pleural plaques in human and baboon lungs, and the incorporation of health-related information into an undergraduate geology project. Theoretical reaction-path modeling for rock-forming minerals in simulated lung fluid shows residence times as: calcite <chrysotile <anorthite <K-feldspar <talc <muscovite = kaolinite = albite = quartz. For each mineral reaction, hydroxylapatite was predicted to precipitate. Several other secondary minerals were also predicted to form (e.g., mesolite precipitates in dissolution reactions of minerals containing Al{esc}p3{esc}s). Batch experiments using lung fluid stimulant and a brucite/chrysotile mineral mixture confirm hydroxylapatite precipitation during reactions in simulated lung fluid. Scanning electron microscopy (SEM) of human lung tissue also confirms the formation of calcium phosphates in the tissue. SEM and x-ray diffraction (XRD) analysis of particles in the lungs of baboons exposed to amosite, chrysotile, crocidolite, and glass fibers identified apatite, calcite, and a number of other minerals in the lung tissue, including aluminosilicates. Finally, an undergraduate classroom project was designed to demonstrate how students can use geology together with epidemiological data they collect to evaluate risk versus perception of risk.Thesis (Ph. D., Geology)--University of Idaho, December 2007
The Crystal Structure of Olivine and the Effect of Crystal Orientation on X-ray Absorption Spectroscopy
No full textX-ray absorption near edge structure (XANES) spectra have been shown to be dependent on crystal orientation. This study characterizes the variation in spectra along the a, b, and c crystallographic axes for olivine group minerals of varying compositions with the formula MgxFe1-xSiO4. Single crystal X-ray diffraction was used to collect the unit cell parameters, atomic coordinates, and bond lengths. The same single crystals were then oriented optically using a spindle stage for X-ray absorption spectroscopy, and for some crystals, the composition was determined by electron probe microanalysis (EPMA) afterward. The compositions from refinement were compared to EPMA results from analysis of the bulk mineral samples, or the same single crystal when possible, and are nearly identical. The partitioning of Mg and Fe into the M1 and M2 crystallographic sites was found to be correlated to the total %Mg in each sample. A small site preference was observed at high levels of total iron, where there is a higher percentage of the total magnesium in the M2 site than there is in the M1 site. The pattern is not as strong for iron in the M1 site at high levels of total magnesium. Neither site seems to be influenced by the concentration of Fe3+. The three crystallographic axes are distinct in the XANES spectra, however samples with lower iron are more easily distinguishable, possibly due to self-absorption. There is a correlation at the pre- edge between peak intensity and total iron, particularly along the b axis.Thesis (Ph.D., Geology) -- University of Idaho, 201
Optical, Compositional, and Structural Identification and Characterization of Fibrous Zeolites
No full textZeolites are a group of aluminosilicate minerals containing various channel and cage structures that allow for the exchange of cations and H2O. Many of fibrous and/or acicular zeolite samples share similar hand sample characteristics making identification by more detailed means essential. Most of the zeolite minerals can be distinguished based on differences in composition, structure and optics. The two zeolite minerals erionite and offretite contain many overlapping properties that make differentiation problematic at times. Erionite is listed as a Group I carcinogen meaning that it is known to cause cancer in humans and animals alike, although the mechanisms by which erionite induces cancer are still unclear. Conversely, offretite does not possess these carcinogenetic properties. Being able to accurately distinguish erionite from other zeolite species will allow for analytical testing laboratories to develop more accurate means of recognizing erionite in an unknown sample. The zeolites in this study were analyzed using Electron Probe Microanalysis (EPMA) for composition, Selected Area Electron Diffraction on the Transmission Electron Microscope (SAED, TEM) and Single Crystal X-Ray Diffraction (SCXRD) for structure, and the Spindle Stage for optics. Erionite and offretite both are hexagonal minerals with differing unit cell sizes and space groups. The unique space group symmetry of erionite, P63/mmc, causes diffraction constraints (i.e. systematic absences) when using SAED on the TEM, while the diffraction pattern of offretite does not show diffraction constraints. Compositionally erionite is more Ca-rich than offretite, which is more Mg-rich, and optically, erionite and offretite have overlapping refractive indices. Zeolite minerals are prone to dehydration due to the abundant H2O in their structure. Dehydration greatly affects the migration of extraframework cations into and out of certain cage and channel structures. Cation migration and the reorientation of H2O molecules can have large influences on the compositional, structural, and optical changes observed in these minerals. Prominent intergrowths, overgrowths, and stacking offsets in erionite and offretite, along with other zeolite minerals, will also directly reflect changes in mineral properties. This study aims to use multiple means of identification to differentiate the fibrous and acicular zeolite species, especially that of erionite and offretite.Thesis (Ph.D., Geology) -- University of Idaho, 201
Mickey Spillane’s Necropolis
No full textThis chapter links the biography and ideology of best-selling pulp author Mickey Spillane with the emergent image of the dying city after World War II. Spillane crafted an image of New York City as physically decaying, demographically in flux, and overrun by violent criminals. These problems required an authoritarian response, illustrated by the character of Mike Hammer, a private investigator turned vigilante who skirts due process to restore order. Spillane’s work offered a template for various critics of New York in the postwar era, as demonstrated in the chapters that follow.</p
Writing about bugs: Teacher modelling peer response and feedback
No full textThis is one teacher’s story about teaching writing. It describes and explains how Mickey (the second author) encouraged her young writers (6–7-year-olds) to collaborate with their peers ‘to make their writing even better’. The article describes how the teacher, Mickey, redesigned her writing lessons to further scaffold beginner writers. Mickey fostered peer response that involved the young writers working with partners—first by becoming active listeners, taking on the role of audience, and then by providing specific feedback on each other’s texts. This resulted in Mickey’s students developing the social skills of collaboration and capacity to engage in dialogic conversations. Furthermore, the students’ developing understanding of evaluation and critique enhanced their ability to change and improve their own written texts
Sociodrama: an interpretive theory for the practice of public relations
No full textIn this unique book, Thomas Mickey looks at public relations from a humanistic definition that is focused on understanding publics rather than controlling them or predicting their behavior. Most public relations books assume several theories, which are more positivist in their approach, because they view public relations as a science. Sociodrama moves beyond that assumption to take public relations as a form of interaction. In this application of the theory of Sociodrama to public relations, Mickey describes Sociodrama\u27s focus on language as the way to constitute the organization rather than as a tool to get something done. The author explains how the theory of Sociodrama proposes elements and levels of a drama present in our language. His study makes use of 2 qualitative research methodologies: focus groups and Q sorting, with a whole chapter of the book devoted to case studies. Mickey\u27s study allows students to obtain a different view of public relations and makes the reader aware of the drama in the language of the organizations and the language of the public. The practitioner can use the knowledge gained from this book to interact in a way which builds a relationship with the publics, talking with them, and not to them.https://vc.bridgew.edu/fac_books/1105/thumbnail.jp
Manifesto on Neighbourliness
No full textThe manifesto and toolkit offers a starting place for ethical creative inquiry when making work with other people or community from an institutional position, such as student, artist-in-resident, or faculty. It is in response to the author’s experience as a community practice artist who spent their undergraduate degree at Emily Carr University frustrated with the overwhelming pressure to create fast-paced, ethically questionable projects using community as subject. Manifesto on Neighbourliness: Ethics Toolkit for Creative Community Inspiration collates knowledge shared via conversation, reading assignments, making mistakes, and other forms of interdependent inquiry. Mickey L.D. Morgan explores ethics through themes such as care, mitigating violence, responsibility, while at the same time an attempt at practicing these through situating themself within the text
Orientation-Dependent Analysis in Mineralogy: Methods and Practice
No full textThe central theme of this dissertation is the importance of orientation when analyzing an anisotropic mineral. Whether this is for identifying the mineral or for characterizing composition or structure, information about the orientation of a particular characteristic can provide unique information about the mineral. For example, in visible light optics of anisotropic minerals, a crystal will have differing refractive indices based on the incoming wavelength and orientation in which light is vibrating through the crystal. These properties are dictated by the chemical composition and structure of the mineral, and when combined with other information about the crystal, such as the locations of crystallographic planes, absorption characteristics, and relative refractive indices, an unknown mineral can be narrowed down often to a particular species using optical mineralogy alone. If a crystal contains proper rotational symmetry, these axes will also correspond with the rotational symmetry of the optical indicatrix, which can be used in crystal structure determination. In absorption spectroscopy, there is evidence that polarization effects from anisotropic crystals influence relative absorption magnitudes outside of the visible light spectrum, even at X-ray wavelengths. In high resolution transmission electron microscopy, image resolution is markedly improved by imaging sections viewing down zone axes, where atomic columns are largely in line. Additionally, electron diffraction patterns viewing down zone axes provide more information about symmetry and structural periodicities. By knowing the orientation of a crystal in thin section, TEM mounts can target specific zone axis orientations of a crystal to obtain meaningful structural information. With knowledge of orientation, precession electron diffraction tomography is expedited when collecting intensity maxima near zone axes, which supplements ab initio structural determination of difficult structures, such as strongly disordered and/or modulated crystal structures. The contents of this dissertation proceed with calculations and methods for orienting crystals by their crystallographic and optical orientations. Using these methods, the remainder of this dissertation outline applications of these methods applied to optical characterization and identification of minerals, an orientation and ferric content model for iron K X-ray absorption in pyroxenes, and a study on structural variation and defects in serpentine minerals and amphiboles from Western Idaho, and their relation to geology and asbestiform mineral occurrences.doctoral, Ph.D., Geology -- University of Idaho - College of Graduate Studies, 2020-0
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