109 research outputs found
SHELL (BIVALVIA, PTERIOMORPHIA)
No full textBiominerals are organo-minerals structures produced by living systems. Since the Cambrian, they contribute to the adaptation of living organisms to different environments by fulfilling a variety of functions that go along with adapted morphologies. One of the aims of biomineralization is to understand how organisms "sculpt" these complex morphologies at nano and molecular scales: we know that occluded organic matrix (OM) proteins influence the lattice parameters of biominerals [1] and that many of them strongly interact with the mineral phase in in vitro assays, but their exact roles are still to be known. The aim of my PhD is to understand the complex relationships between the organic and mineral phases. In the present study, I discuss the case of the Mediterranean fan mussel Pinna nobilis.
Like most molluscs, Pinna nobilis, the fan mussel, envelops its soft body with a highly ordered shell composed of two mineralized layers: the internal one is nacreous made of aragonite, while the outer one is made of long calcitic prisms that grow perpendicularly to the surface of the shell. This latter shell layer comprises an assemblage of insoluble periprismatic matrix (proteins + saccharides) and very acidic "intracrystalline" proteins and sugars, together with pigments. This shell layer was submitted to:
Morphological and spectral characterization: To unveil the complex and hierarchical structures of biomineral models, we have acquired high-resolution 2D and 3D images by using different microscopic and spectro-microscopic techniques at Synchrotron SOLEIL. Under UV light, we have recently evidenced a striking luminescent pattern - never observed before - in relation to pigments.
Biochemical analysis of organic matrix: we have analyzed the intra and inter-prismatic OM by gel electrophoresis, ELISA test and western blot. Moreover, a transcriptome constructed from the mantle tissues has helped us to identify by proteomics a large set of proteins associated to the formation of prisms.
The significance of our results is discussed here. Our data tend to show that the formation of "simple prisms" is an extremely regulated process, which requires several molecular actors
Implementation and evaluation of thermal avoidance strategies in arid, cost-constrained climates aimed at improving indoor thermal comfort : a case study in Bhuj, India
No full textThesis: S.M. in Building Technology, Massachusetts Institute of Technology, Department of Architecture, 2018.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 150-155).The use of air conditioning in the buildings sector has been rapidly increasing. The International Energy Agency projects that rising income and greater access to air conditioning equipment in many developing countries will increase CO₂-equivalent emissions, energy consumption, and urban heat island effects. India is a prime example of a region where new building trends, hot climatic conditions, increasing social aspirations, and rapid population growth is likely to spread the adoption of air conditioning. To reduce the need for air conditioning, the research team has worked to develop, implement, and evaluate methods to reduce temperatures within the built environment using largely passive means. Building on the past work of Nelson and Gradillas, the thesis presents the results of long-term temperature monitoring within four homes in Bhuj, India. Results from the collective work have helped to inform future designs for the region, and resulted in an innovative roof concept. Using scale models, thermal simulations, and full-scale housing, results from the thesis explore new methods of implementing solutions for reduced solar heat gain, reduced heat absorption, and increased heat rejection. The research concludes by presenting early work on additional techniques and implications of using indigenous products to better thermal comfort conditions. Applicable outside of India, the techniques can be utilized in other regions and climates, as well as concurrently with active cooling systems to reduce energy consumption or extend existing capacity. Further work will seek to improve the design and adaptability of the system to different regions.by Johnathan J. Kongoletos.S.M. in Building Technolog
Students' perception of the relevance of graduate education in business: dimensionality and assessment of MBA programs among selected Nigerian universities, 1984
No full textManagement education in Nigeria is being subjected to increasing criticism on a number of grounds. One criticism is that curriculum in organizational behavior courses has focused on conceptual and analytical training based on foreign texts. There is also a growing concern that tomorrow's private and public management executives need a broader education along a number of dimensions. The expectation that differences exist between a Humanist and Bureaucrat in leadership roles receives implicit support in the theory of human relations. Literature reviews on Nigerian management thoughts and practices provide no empirical evidence on the impact on the Master of Business Administration (MBA) programs in Nigeria
Paradigms (Optimal and Otherwise): A case for scepticism
No full textThis paper aims to contribute to the debate on the status of inflectional paradigms in grammatical theory, with special reference to the theory of Optimal Paradigms (OP, McCarthy 2005), a particular version of Paradigm Uniformity. OP proposes that certain systematic phonological differences between nouns and verbs should be analyzed as arising from contingent facts about the individual affixes making up the nominal and verbal inflectional paradigms. I argue here that the Arabic data presented in OP does not support the OP model (as against, for example, cyclic alternatives) and that consideration of similar phenomena in Itelmen, a language with richer inflectional paradigms, suggests that it is morpho-syntactic category and not paradigm properties, that determine phonological behaviour.This is a revised version of the paper presented at the MIT Paradigms Workshop 2004.The definitive version of this paper is published in Infectional Identity and is available at http://ukcatalogue.oup.com/product/9780199219643.do#.Ug5j7xlgNeIBobaljik, J.D. (2008). Paradigms (Optimal and Otherwise): A case for scepticism. In A. Bachrach & A.I. Nevins (Eds.), Inflectional Identity. Oxford, UK: Oxford University Press.Portions of the research reported in this paper have been supported by grants from FCAR (2002-NC-75019) and SSHRC (410-2002-0581).ISBN: 9780199219643 (Published book)Peer reviewe
Whitehorse climate change adaptation plan
No full text"The main role of the Whitehorse Community Climate Change Adaptation Project Local Advisory Committee (WLAC) has been to provide a local perspective to the project and to guide the allocation of money for pilot adaptation projects.The WLAC members were chosen to balance the broad and overlapping interests/jurisdictions that co-exist in Whitehorse while striving for solutions which will be effective and widely supported--from Forward
A Transcription of Rebecca Clarke’s Sonata for Viola and Piano for Clarinet and Piano by Johnathan Christian Robinson
No full textabstract: Throughout centuries of great classical music, many clarinet compositions have been adapted from a wealth of literature for string instruments and instruments of similar ranges. Viola, violin, and cello literature can often be adapted into challenging literature for the clarinet. While the works of English composer and violist, Rebecca Clarke (1886-1979), have gained popularity in the early 2000s, many of her compositions have yet to be discovered by musicians performing on wind instruments of similar ranges.
While legendary western composers such as Mozart, Weber, and Brahms, will continue to be enduring icons in classic clarinet literature, performers and educators alike should always consider the integration of transcribed works for the expansion and diversity of the repertoire. Although a sizeable amount of literature for clarinet is contained in orchestral and chamber works of the late-Romantic era, the availability of solo clarinet literature in this style is lacking. The purpose of the project is the addition of Rebecca Clarke’s 1919 Viola Sonata for B-flat soprano clarinet and piano to the solo clarinet repertoire. The transcription preserves the integrity of the original music while exploring the virtuosic nature of the clarinet and its interaction with the piano. Comments on the historical background of Clarke’s Viola Sonata and the transcription procedures are provided as well.Dissertation/ThesisDoctoral Dissertation Music 201
Who is Little Enis
No full text25 x 22 cm.Folded broadside of the poem 'Who Is Little Enis?' by Johnathan Williams, with photo by Make-Hay Studios, designed by Captain Vague & the Edgarologist, signed by author 'for David', ca. 1974. 25 x 22 cm
Geographies of Conflict: Towards Liberation, Self-determination and Spatial justice in Sri Lanka's North-East
No full textThis research project aims to understand the spatial and procedural implications of planning and spatial justice in conditions of oppressive power and conflict. Ambitions towards spatial justice amongst marginalized ethnic minority populations are at further risk if liberal notions of government and planning continue to operate under the ethnocratic state regime. This demands an alternative approach and perspectives that are context-specific to which can engage with the realities of marginalized populations towards the quest for justice. The research framework is steered by an exploratory research approach that suggests an organic process to contextualize the preconditions of spatial justice as the research begins to unveil the marginalized areas of North-Eastern, Sri Lanka. The project aims to understand how spatial planning (planning and design) can unlock conditions to support the quest for spatial justice, self-determination, and liberation of Eelam Tamils in Sri Lanka's North-East.Architecture, Urbanism and Building Sciences | Complex Citie
Chicago Summer Institute 2013 - Bias, Balance, Fairness and You
No full textMainstream Media's Pose of Fairness is the Real Poison in American Journalism -- Johnathan TobinThis article, written by Johnathan Tobin presents a counterpoint to the editorial written by Bill Keller, executive editor of the New York Times, who claims that conservative Fox news is biased. The author claims that Bill Keller and his "hyper-liberal biased reporting," "unbalanced opinion pages" and "liberal prejudices" were never a secret when he was the paper's editor. This is used as supplemental reading to the Balance, Fairness, and Bias lecture.Mainstream Media's Pose of Fairness is the Real Poison in American Journalism -- MainstreamMedia.pdfThe work(s) contained within this record have been analyzed and cataloged by members of the University Libraries' Resource Management Division.Center for News Literacy
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