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Benoot, Nicolas. "Self-assembly of hybrid microgels for interferential and responsive photonic applications." Electronic Thesis or Diss., Pau, 2020. http://www.theses.fr/2020PAUU3047.
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Dans le milieu des produits cosmétiques et de soins pour la peau, il existe un réel besoin d’innovation pour trouver de nouveaux matériaux sans impact sur le consommateur et l’environnement. Dans une démarche bio-inspirée, les couleurs dites « physiques » offrent une nouvelle voie de création de couleurs sans pigments inorganiques. En effet, aujourd’hui les pigments minéraux sont la principale source de coloration pour les applications cosmétiques et leur remplacement représente un enjeu critique pour limiter une éventuelle exposition à de potentielles nanoparticules.Sensible à cet enjeu, LVMH Recherche s’est investi avec l’IPREM pour concevoir une solution issue de l’auto-assemblage de micro-hydrogels, dits microgels, aux multiples propriétés stimulables, pour produire de la couleur sans pigments.Ces microgels, dispersés dans l’eau, ont la capacité de s’organiser spontanément lors de l’évaporation du solvant pour produire des assemblages très réguliers. Ces assemblages périodiques, assimilés à des « cristaux colloïdaux » interfère avec la lumière visible et peuvent conduire à des phénomènes de diffraction. La diffraction de la lumière visible par les cristaux colloïdaux entraine une coloration dite « physique ».Les travaux de ce projet de thèse s’intéressent à la conception de microgels hybrides pour exalter ses propriétés photoniques et aboutir à la formation de films après séchage dont les couleurs puissent être modifiées par un stimulus. Le manuscrit présente d’abord le contexte scientifique dans lequel s’inscrivent ces travaux avant d’aborder la démarche de synthèse entreprise. Dans un second temps, les propriétés photoniques et stimulables sont discutées en lien avec les organisations 3D des microgels au sein du film. Pour finir, les efforts pour transposer cette technologie dans une formulation cosmétique sont présentésIn the world of cosmetics and skin care products, there is a real need for innovation to find new materials with no impact on the consumer and the environment. In a bio-inspired approach, so-called "physical" colors offer a new way of creating colors without inorganic pigments. Indeed, today mineral pigments are the main source of coloring for cosmetic applications and their replacement represents a critical issue to limit possible exposure to potential nanoparticles.Sensitive to this challenge, LVMH Research worked with IPREM to design a solution resulting from the self-assembly of micro-hydrogels, known as microgels, with multiple stimulable properties, to produce color without pigments.These microgels, dispersed in water, have the capacity to spontaneously organize themselves during the evaporation of the solvent to produce very regular assemblies. These periodic assemblages, assimilated to "colloidal crystals", interfere with visible light and can lead to diffraction phenomena. The diffraction of visible light by the colloidal crystals leads to a so-called "physical" coloration.The work of this thesis project focuses on the design of hybrid microgels to enhance its photonic properties and lead to the formation of films after drying whose colors can be modified by a stimulus. The manuscript first presents the scientific context in which this work is carried out before discussing the synthesis process undertaken. In a second step, the photonic and stimulable properties are discussed in relation to the 3D organization of microgels within the film. Finally, efforts to transpose this technology into a cosmetic formulation are presented
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Waters, Hayley A. "Influence of color attributes, context, and individual differences on affective responses to wall colors." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/29576.
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Francis, Christine M. "The Impact of a "Response to Intervention" Initiative on Teachers' Efficacy with Students of Color in a Voluntary Desegregation Program." Thesis, Boston College, 2009. http://hdl.handle.net/2345/715.
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Thesis advisor: Elizabeth A. TwomeyThesis advisor: James Marini
This qualitative case study focused on a Response to Intervention (RTI) literacy initiative in a suburban elementary school near an urban area in New England. The initiative incorporated professional development about RTI and implementation of components of an RTI model. The participant-researcher analyzed teachers' feedback regarding the professional development and the RTI model, as the initiative developed, with a specific focus on the teachers' perceptions about the impact of the initiative on the school's capacity to effectively instruct urban students of color who are participants in a voluntary desegregation program. The professional development about RTI incorporated three features which are recommended for professional learning communities: content which is research-based, process which includes reflection and dialogue, and context which is job-embedded. The RTI model utilized the "problem-solving" approach, and incorporated progress-monitoring and interventions. The findings from the study indicated that the combination of three elements (sustained professional development about RTI, implementation of RTI in the school setting, and conversations and questions about addressing the needs of urban students of color) resulted in increased teacher confidence in their ability to provide effective instruction to this population of students. Further, the interaction of these three elements resulted in identification of next steps which the teachers believe will specifically address these students' needs. However, several teachers questioned whether RTI was adequate to address the complex issues of students of color in a voluntary desegregation program. They recognized that they needed more information about effective instructional strategies to match the learning profiles of this population of students. Combining the results of this case study with the recommendations of the professional literature about culturally responsive teaching, it appears that Response to Intervention has the potential to address the learning needs of urban students of color, but only if practitioners incorporate some basic principles of culturally responsive teaching. Integrating the results of this study with the professional literature about Response to Intervention, culturally responsive teaching, and effective professional development, the participant-researcher recommends that policymakers and educators should consider incorporating culturally responsive teaching into their RTI models in order to truly make RTI effective for addressing the achievement gap. Further, the researcher recommends that schools should provide sustained professional development (with content based upon research, process which includes reflection and dialogue, and context which is job-embedded) to increase teachers' understanding about Response to Intervention and about culturally responsive teaching
Thesis (EdD) — Boston College, 2009
Submitted to: Boston College. Lynch School of Education
Discipline: Educational Administration
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Crenshaw, Erik Daniel. "Stimuli Responsive Colorimetric Elastomers via Thiol-yne Chemistry." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1555580690422118.
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Hikade, Stribling Emily Elizabeth. "Light, Color and Texture: How the Physical Environment Can Aid the Treatment of Cancer." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1242835088.
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Hemphill, Brian D. "Light Emitting Diodes and a Monochrome Camera to Measure Chemical Optode Response." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1354890395.
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Busck, Gundersen Eline. "Making sense of response-dependence." Thesis, St Andrews, 2007. http://hdl.handle.net/10023/211.
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Didion, Jeremy E. "Color Perception and Object Recognition in a Lake Malawian Cichlid Melanochromis Auratus." Bowling Green State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1344885435.
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Sundlöf, Sebastian. "Light and Paint:perceptual and emotional effects on space and humans." Thesis, KTH, Ljusdesign, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280082.
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In 21st century Scandinavia, the use of colored paint in the built environment has decreasedconsiderably. Instead, color changing LEDs can be found in many homes. In this thesis, an experimentwas set up to investigate how these two coloring methods differ and coincide with regards toemotional response and perception of materiality. Four cubicles, two painted and two colored bylight, were evaluated by ten participants. The painted cubicles were perceived as more material intheir appearance with regards to texture and color than their counterparts. A greater feeling ofnervousness, stress, and disorientation was felt in the light-colored cubicles as opposed to aheightened feeling of inspiration, excitement and calmness in the painted cubicles. Though it isimportant to remember the difference was not significant. In addition, preconceived connotations tothe color tone could be an influencing factor and so further studies on additional tones should beconducted. Lastly, benefits and drawbacks with the coloring methods were discussed.
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Benitez, Adiel Alexis. "Prised out of paradise : reconsidering cooperatives, in response to climate gentrification in Miami's communities of color." Thesis, Massachusetts Institute of Technology, 2021. https://hdl.handle.net/1721.1/132761.
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Thesis: M. Arch., Massachusetts Institute of Technology, Department of Architecture, February, 2021Cataloged from the official pdf thesis.
Includes bibliographical references (pages 310-319).
Our current global health crisis has clearly rendered how a lack of stable housing, access to care, and the effects of climate change, disproportionately affect our communities of color. Contemporary development patterns demonstrate the inadequacies of unchecked neoliberalism, and its adverse effect on the development of equitable housing. Within this context, Miami presents itself as a vulnerable coastal city exemplar. A growing city, Miami struggles with an endemic affordability crisis, and the long lasting scars of segregation, redlining, and urban renewal in its most vulnerable communities. Today, the city's muddled past has been compounded with its uncertain future. Despite palpable climate change, construction continues along the Miami waterfront, fueled by foreign investors who park capital in luxury real estate. For local residents, both low and mid income, the cost of living continues to rise along with sea levels. Miami, outwardly marketed as a tropical oasis, is now regarded as one of the country's most inequitable cities. This thesis takes issue with the commodification of housing, and its adverse effects on the vulnerable communities of greater Miami. While Miami's surplus of luxury real estate swells, climate change and speculative development have combined to threaten the stability of the city's multi-ethnic core. Instead, it re-considers the cooperative, and the collective ownership of housing, as a mechanism by which communities can reclaim agency within hostile markets, and open up access to stabilize housing in response to climate gentrification, as well as opening up access to other forms of social and financial capital. It works to re-contextualize the cooperative ownership of housing within the Miami context, considering its deployment as an architectural response who's programming and spatial organizations respond to both collective use and collective need.
by Adiel Alexis Benitez.
M. Arch.
M.Arch. Massachusetts Institute of Technology, Department of Architecture
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Holland, Annabelle Jane Milne. "Visual corporate identity and internal customer perceptions : employee response to corporate colours and symbols in an education environment." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5684.
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This thesis examines the importance of employee perceptions of their organisation's visual corporate identity (VCI) particularly the symbolic 'corporate logo'. Employees' views of the logo reveal their perceptions of the organisation itself (Henderson and Cote 1998:15, Olins 1995:73) so are an important indicator of their positive or negative feelings towards their establishment. Previous research recognises the significance of employees' opinions, but has overlooked their perceptions of the VCI. In education, external marketing (including VCI) is of growing interest but there has been little concern with internal marketing. Methodology A mixed methods, sequential, explanatory case study into a UK independent school was undertaken. Quantitative data was obtained from questionnaires, distributed to the schools' employees and qualitative data from interviews; analysis reveals convergent and divergent findings.Findings The majority of the schools' employees consider the corporate colours and logo important, associate positive meanings with the logo and were proud to be linked to the school by wearing branded items. Employees felt affiliation for the logo and considered the VCI to be strong although responses differed depending upon gender, full or part-time employment, department, seniority and length-of-service. A new model has been developed, the IMP Test, that reveals the perceptions; the importance, meanings, and pride that employees attach to their VCI. Implications These findings reinforce and add to previous research of employee perceptions of their VCI (particularly in education) and it follows, towards their organisation. Utilising this approach, managers can gain a deeper understanding of employee perceptions which has implications for morale and motivation.
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Holland, Annabelle J. M. "Visual corporate identity and internal customer perceptions : Employee response to corporate colours and symbols in an education environment." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5684.
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This thesis examines the importance of employee perceptions of their
organisation¿s visual corporate identity (VCI) particularly the symbolic ¿corporate
logo¿. Employees¿ views of the logo reveal their perceptions of the organisation
itself (Henderson and Cote 1998:15, Olins 1995:73) so are an important
indicator of their positive or negative feelings towards their establishment.
Previous research recognises the significance of employees¿ opinions, but has
overlooked their perceptions of the VCI. In education, external marketing
(including VCI) is of growing interest but there has been little concern with
internal marketing. Methodology
A mixed methods, sequential, explanatory case study into a UK independent
school was undertaken. Quantitative data was obtained from questionnaires,
distributed to the schools¿ employees and qualitative data from interviews;
analysis reveals convergent and divergent findings.Findings
The majority of the schools¿ employees consider the corporate colours and logo
important, associate positive meanings with the logo and were proud to be
linked to the school by wearing branded items. Employees felt affiliation for the
logo and considered the VCI to be strong although responses differed
depending upon gender, full or part-time employment, department, seniority and
length-of-service. A new model has been developed, the IMP Test, that reveals
the perceptions; the importance, meanings, and pride that employees attach to
their VCI. Implications
These findings reinforce and add to previous research of employee perceptions
of their VCI (particularly in education) and it follows, towards their organisation.
Utilising this approach, managers can gain a deeper understanding of employee
perceptions which has implications for morale and motivation.
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Clay, Gary Robert. "Integrated scenic modeling of environmentally induced color changes in a coniferous forest canopy." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187420.
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The relationship between the changes in color values of scenic landscapes, and the corresponding shifts in viewers' preferences to those changed environments, was the focus of the presented research. Color modifications, either natural or based on some human intervention, provide visual clues that an environment has undergone some transformation. These color changes can occur at both the micro and macro scale, can having temporal dimensions, and can be a result of combinations of both physical landscape change, and shifts in an observer's perspective with respect to that landscape. The research reviewed two existing models and related them in an integrated program of scenic change analysis. The first, a bio-physical remote sensing model, identified the relationships between the existing bio-physical environmental conditions and measured color signatures of selected landscape features. The second, a psychophysical perception model, established relationships between the landscape's bio-physical attributes and measured perceptual responses to those environments. By merging aspects of each model, the research related the changing scenic color patterns with observers' responses to those changed environments. The research methodology presented a program of scenic change analysis incorporating several technologies including (1) ground-based biological inventories, (2) remote sensing, (3) geographic information systems (GIS), and (4) computer visualization. A series of investigations focused on landscape scenes selected from a high elevation coniferous forest in southern Utah. Three initial scenic investigations compared (1) the impact of changing view angles on scenic color values, (2) color shifts due to changing sun-illumination angles within a day, and (3) color shifts due to changing biological conditions over a 12-month period. A fourth investigation measured the color changes caused by a spruce bark beetle outbreak, and developed a series of color signatures to simulate the color shifts indicative of an outbreak at different stages of development. These signatures were applied to digitized site photographs to produce a series of visualizations displaying different levels of beetle damage. The visualizations were then applied in a series of perceptual experiments to test the precision and reliability of the visual simulations.
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Lattanzio, Matthew S. "Ecological and Phenotypic Divergence among Ornate Tree Lizard (Urosaurus ornatus) Color Morphs in Response to Environmental Variation." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1391520436.
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Butler, Erick. "ELECTROCHEMICAL/ELECTROFLOTATION PROCESS FOR DYE WASTEWATER TREATMENT." Cleveland State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=csu1375458697.
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Glenn, Tristan L. "Making a Difference in the Lives of Students: Successful Teachers of Students of Color with Disabilities or who are At-Risk of Identification of Disabilities at a High-Performing High-Poverty School." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4491.
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Urban settings are described in scholarly literature as areas beset with high concentrations of poverty, high incidences of crime and violence, and are typically occupied by high percentages of people of color (McKinney, Flenner, Frazier, & Abrams, 2006; Mitcham, Portman, & Dean, 2009; Vera, 2011). For many children who live in low-income urban school districts, our educational system is failing them (McKinney, Flenner, Frazier, & Abrams, 2006). Swanson-Gehrke (2005) reported that at least two-thirds of these children fail to reach basic levels of achievement in reading. Such dismal achievement results may be attributed to a myriad of issues faced by students living in high poverty that may impede the learning process.
Improving the school achievement of these students requires comprehensive knowledge, unshakable convictions, and high-level pedagogical skills (Gay, 2010). The identification of effective instructional practices used to address the academic and social needs of these students has appeared to be an elusive task. The current study focused on this reality by investigating a school that has been able to create systems that result in improved academic and social outcomes of their students. Specifically, the study examined the instructional practices and beliefs of teachers of students of color with disabilities or at-risk of identification of disability at a high-performing high-poverty school.
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Alvey, Richard Melvin. "The coordination of apo-protein and bilin biosynthetic enzyme expression in response to light color and sulfur availability in Fremyella diplosiphon." [Bloomington, Ind.] : Indiana University, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3229574.
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Thesis (Ph.D.)--Indiana University, Dept. of Biology, 2006."Title from dissertation home page (viewed July 10, 2007)." Source: Dissertation Abstracts International, Volume: 67-08, Section: B, page: 4232. Adviser: David Kehoe.
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Diamond, Gabrielle F. "Bats and Mines: Evaluating Townsend's Big-eared Bat Maternity Colony Response to Reclamation." DigitalCommons@USU, 2007. https://digitalcommons.usu.edu/etd/6606.
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With the loss or modification of natural roosting habitat afforded by caves, abandoned mines have assumed increased importance as surrogate roosting sites for Townsend's big-eared bats (Corynorhinus townsendii) and other chiropteran species. However, increasing concerns for human safety have led to accelerated programs for mine closure. In efforts to protect roosting sites in mines showing significant bat activity, "bat compatible" gates are installed, thus allowing continued access to mine workings. Aside from ensuring public safety, these structures afford protection from disturbance to roosting bats. To date few posting-gating studies have been conducted to obtain information on the effects of these structures on bat behavior and roost suitability. I evaluated the effects of gating on bat flight patterns at maternity colonies in two previously gated (reference) and two ungated mines, the latter (treatment) being gated with roundbar Manganal steel gates in the second year of the study. I also monitored four gated and three treatment mines to determine the potential effects of reclamation on internal microclimate. Overall circling activity increased > 6-fold at the portals of treatment mines following gating. Indices of crowding and frequency of bat-gate collisions were significantly higher in previously gated and increased substantially in treatment mines following reclamation. Gates appeared especially hazardous to subadults during initial-volancy periods. Increased activity of bats and collisions with gates at mine portals may amplify vulnerability to potential predators. Changes in internal mine microclimates, specifically increased ranges between minima and maxima in temperature and vapor pressure deficits following reclamation varied among treatment mines as a function of the number of mine openings. Generally, gated mines with multiple openings experienced greater changes in these parameters than those with single openings. Additional studies of bat-compatible gates are needed to elucidate possible long-term effects of these structures on Townsend's big-eared bats.
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Soares, Anaïs. "Exploration de l'adaptation de Pseudomonas aeruginosa en biofilm : rôle dans l'échec des traitements antibiotiques." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMR045/document.
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Les infections en biofilm, notamment de dispositifs médicaux, mettent fréquemment en échec les traitements antibiotiques, imposant le retrait du matériel. Pseudomonas aeruginosa s’est imposé comme le pathogène-type des infections en biofilm. Pour explorer les déterminants de l’échec du traitement antibiotique en biofilm, un modèle de biofilm in vitro à P. aeruginosa exposé à des doses supra-inhibitrices d’antibiotiques a été développé. En culture planctonique, une bithérapie deciprofloxacine et d’amikacine permettait de prévenir la sélection de mutants résistants pour des souches de P. aeruginosa de sensibilité diminuée à la ciprofloxacine ou à l’amikacine par surexpression d’efflux. En biofilm, l’association de la ciprofloxacine et de l’amikacine, administrées simultanément ou séquentiellement, n’était pas supérieure aux monothérapies, permettant une réduction bactérienne, mais pas d’éradication complète du biofilm. Quelles que soient les souches (sauvages ou exprimant un efflux) et l’antibiotique, l’échec microbiologique en biofilm était lié à la sélection de cellules persistantes, tolérantes aux antibiotiques. La ciprofloxacine induisait des modifications importantes de la structure du biofilm avec une réduction considérable des exopolysaccharides, composants majeurs de la matrice. L’étude transcriptomique de gènes potentiellement impliqués dans la persistance suggérait que l’activation précoce de la réponse stringente pourrait être une des voies principales de la tolérance en biofilm sous ciprofloxacine. Enfin, la présence de « small colony variants » au sein du biofilm, dotés d’une capacité accrue de formation de biofilm, témoignait de la diversité des populations en biofilm. Ces travaux participent ainsi à une meilleure compréhension des mécanismes d’échappement aux antibiotiques de P. aeruginosa en biofilmBiofilm device-related infections can lead to antibiotic failure requiring frequent removal of medical device. Pseudomonas aeruginosa has emerged as the typical pathogen for biofilm infections. To explore the determinants of antibiotic failure in biofilm, an in vitro P. aeruginosa biofilm model exposed to suprainhibitory antibiotic concentrations was developed. In planktonic culture, the ciprofloxacin and amikacin combination prevented the selection of resistant mutants in ciprofloxacin and amikacinlow-level resistant P. aeruginosa strains overexpressing efflux. In biofilm, the ciprofloxacin and amikacin combination, used simultaneously or sequentially, didn’t show superior effects compared to monotherapies. Despite an initial bacterial reduction, biofilm eradication was not obtained. Regardless of wild-type or efflux strains and antibiotic regimen used, antibiotic failure was related to the selection of antibiotic-tolerant cells named “persisters”. Ciprofloxacin induced significant alterations in the biofilm structure, notably a considerable reduction in the exopolysaccharides of the matrix. The transcriptomic analysis of genes, potentially involved in persistence, suggested that early activation of the stringent response might be one of the main pathways for ciprofloxacin tolerance in biofilm. Finally, the emergence of "small colony variants" within the biofilm, characterized by enhanced ability to form biofilm, attested to biofilm heterogeneity. This work therefore contributes to a better understanding of how P. aeruginosa biofilms escape antibiotic
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Diliwi, Avesta, and Josefin Bäcker. "Are You Creating Socially Responsible Visual Communication? : An Exploratory Study of Fashion Companies’ External Social Responsibility on Instagram: A Marketer’s Perspective." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-21905.
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Background: Following the development of digitalization and the emergence of social media a lot of attention has been drawn upon how these platforms are influencing the fashion industry and fashion marketing. As society is becoming more ethics and health conscious, fashion companies’ visual representations in social media are drawing more attention - who is represented and how are these representations portrayed. Previous research has shown that white and thin models are a recurrent over-representation in media, consumers through these see the ‘ideal’ or stereotypical body types or norms, and not an actual or full representation of society. The issue is, however, not that white or thin people are represented in media. The problem is how companies portray these representations and how the portrayals lead to the exclusion and misrepresentation of other groups in society. Purpose: The purpose of this study is to investigate the CSR practice of fashion companies regarding the body image representations in social media marketing communications, with specific focus on the marketer’s perspective. Methodology: For this study an exploratory cross-sectional case-study research design approach was applied. Four corporate cases of fashion companies were analyzed using data triangulation methods on the basis of content analysis and semi-structured interviews. First, case analysis of social media contents and interviews were conducted, followed by cross- sectional analysis to find out if fashion companies’ practiced social responsibility is aligned with the verbally expressed social responsibility. Findings: The findings of this study demonstrate that fashion companies consider external social responsibility as an important issue, however, a gap between the companies practiced social responsibility and verbally expressed social responsibility remains. The study shows that two of the companies’ practiced social responsibility on their Instagram channel is in alignment with their verbally expressed social responsibility, when it comes to representing diversity in terms of body size, ethnicity and skin color. However, when it comes to the representational conventions it was noted that all the companies are lacking in external responsibility due to the continuous signs of idealization and body-ism on all the companies’ Instagram channels. Conclusion: This study contributes to the research field regarding companies’ external social responsibility on Instagram. The findings provide companies and researchers with awareness of which representational conventions/key social aspects are currently lacking in corporate marketing activities and should become the focus for further improvement. Based on obtained results, a modified framework for image analysis and criteria for image/content creation are suggested. The framework and criteria can assist future researchers, help content creators and other practitioners to understand the complexity of external social responsibility and how to implement it in practice.
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Raut, Vivek P. "METHODS TO QUANTITATIVELY ASSESS THE PERFORMANCE OF CONNECTIVE TISSUE PROGENITOR CELLS IN RESPONSE TO SURFACE MODIFIED BIOMATERIALS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1372334668.
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Shepherd, David J. "Elucidating the Effects of Thiamethoxam Neonicotinoid on Honey Bee Learning Using the Proboscis Extension Response." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/honors/376.
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In this study, the effects of the neonicotinoid pesticide, thiamethoxam, are examined through the Proboscis Extension Response (PER) in honey bees (Apis mellifera). PER is a form of classical conditioning applied to honey bees through scent and reward association which quantifies learning rates. Results between groups treated with thiamethoxam did not differ significantly from untreated control groups. Potential reasons for these results are discussed. The method and experimental apparatus for testing the PER assay are also discussed.
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N'Diaye, Yawa Noelle. "That which cannot be shaken shall remain an assessment of environmental response and strategic and issue orientations among civil rights organizations (1980-2005) /." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5357.
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Thesis (Ph. D.)--West Virginia University, 2007.Title from document title page. Document formatted into pages; contains viii, 205 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 173-179).
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Björk, Carl Johan. "PID tuning with Ant Colony Optimization (ACO) : A framework for a step response based tuning algorithm." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-33903.
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The building automation industry lacks an affordable, simple, solution for autonomous PID controller tuning when overhead variables fluctuate. In this project, requested by Jitea AB, a solution was developed, utilising step response process modelling, numerical integration of first order differential equations, and Ant Colony Optimization (ACO). The solution was applied to two control schemes; simulated outlet flow from a virtual water tank, and the physical air pressure in the ventilation system of a preschool in Sweden. An open-loop step response provided the transfer function in each case, which, after some manipulation, could be employed to predict the performance of any given set of PID parameters, based on a weighted cost function. This prediction model was used in ACO to find optimal settings. The program was constructed in both Structured Control Language and Structured Text and documented in an approachable way. The results showed that the program was, in both cases, able to eliminate overshoot and retain the settling time (with a slightly raised rise time) achieved with settings tuned per the current methods of Jitea AB. Noise and oscillations present in the physical system did not appear to have any major negative influence on the tuning process. The program performed above Jitea AB’s expectation, and will be tested in more scenarios, as it showed promise. Autonomous implementation could be of societal benefit through increased efficiency and sustainability in a range of processes. In future studies, focus should be on improving the prediction model, and further optimising the ACO variables.Byggnadsautomationsbranschen saknar en kostnadseffektiv lösning för att autonomt trimma in PID-regulatorer när överordnade variabler fluktuerar. I detta (av Jitea AB beställda) arbete, utvecklades en lösning baserad på stegsvarsmodellering, numerisk integration av första gradens ordinära differentialekvationer och myrkolonisoptimering (ACO). Lösningen applicerades i två regleringsfall; en simulerad utloppsventil från en virtuell vattentank, och det fysiska lufttrycket i ventilationssystemet på en förskola i Sverige. Ett stegsvar med öppen slinga gav en överföringsfunktion i respektive fall, som efter viss manipulering kunde nyttjas för att förutspå prestandan för en uppsättning PID-parametrar baserat på en samlad, viktad kostnadsfunktion. Predikteringsmodellen implementerades i ACO för att finna optimala parametrar. Programmet konstruerades i Structured Control Language och Structured Text, och dokumenterades på ett pedagogiskt sätt. Resultaten visade att programmet (i båda fallen) klarade att eliminera översläng med bibehållen stabiliseringstid (och något förskjuten stigningstid) jämfört med Jitea AB:s existerande trimningsmetod. Signalbrus och oscillationer i det fysiska systemet verkade inte ha någon avsevärd negativ inverkan på trimningsprocessen. Programmet presterade över Jitea AB:s förväntan, och kommer (med tanke på de lovande resultaten) fortsatt att testas i fler scenarion. Implementation av en autonom version skulle kunna innebära flera samhälleliga förmåner i form av ökad verkningsgrad och hållbarhet i en rad processer. I framtida studier bör fokus läggas på att ytterligare förbättra prediktionsmodellen, samt att vidare utforska de optimala myrkolonisvariablerna.
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ávila, Suelen. "ANTOCIANINAS DE AMORA BRAZO: EXTRAÇÃO, ESTABILIDADE E COPIGMENTAÇ." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2015. http://tede2.uepg.br/jspui/handle/prefix/644.
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Anthocyanins are natural colorants that provide attractive and bright colors to most plants, coloring them the bright red to violet. Due to its instability facing the food processing steps and their difficulty of extraction are still little used in the food industry. Flavonoids not anthocyanins, amino acids, nucleosides, organic acids and anthocyanins themselves may act as copigments enabling the anthocyanins as natural colorants. The objective was to evaluate the approximate composition, phenolic compounds, antioxidant activity of blackberries Brazo (Morus nigra L.) and the stability of anthocyanins. The effect of the addition of organic acids and polyphenolic extract of Camellia sinensis raw extract of blackberries anthocyanins as copigments. The copigmentation reaction buffer at pH 3.0, was confirmed by UV-Visible absorption and by high high-performance liquid chromatography analysis. The calculated half-life and the color retention percentage. The response surface methodology was effective to estimate the effect of three independent variables on anthocyanins extraction, the optimal values suggested for the extraction with citric acid were time of 60 min., ratio of 1 g / 30 mL and a temperature of 60 ºC and the extraction with hydrochloric acid have been suggested the same conditions of time and ratio, but at 20 ° C. The increase in relation copigmento / anthocyanins was evidenced by the bathochromic and hyperchromic effects. The interaction of anthocyanins was significantly affected by temperature (5 ± 3 ° C and 25 ± 3 ° C) and the environment (light and dark). The stability of anthocyanins with added copigmento increased half-life and the color retention percentage of sample. Maximum stability was achieved in samples with the addition of caffeic acid at a temperature of 5 ° C ± 3 ° C in the dark. Anthocyanins added caffeic acid and malic showed half-life of 242.40 ± 25.40 and 200.48 ± 12.15 days, respectively, bringing prospects for application of this natural dye.
Antocianinas são corantes naturais que proporcionam cores atrativas e brilhantes à maioria das plantas, colorindo-as do vermelho vivo ao violeta. Devido à sua instabilidade frente às etapas de processamento de alimentos e a sua dificuldade de extração ainda são pouco utilizados na indústria alimentícia. Flavonóides não antociânicos, aminoácidos, nucleosídios, ácidos orgânicos e as próprias antocianinas podem agir como copigmentos viabilizando as antocianinas como corantes naturais. O objetivo do trabalho foi avaliar a composição aproximada, os compostos fenólicos totais, a atividade antioxidante de amoras Brazo (Morus nigra L.) e a estabilidade das suas antocianinas. Foi avaliado o efeito da adição dos ácidos orgânicos e extrato polifenólico de Camellia sinensis ao extrato bruto de antocianinas de amora como copigmentos. A reação de copigmentação em solução tampão pH 3,0, foi confirmada por espectrofotometria de absorção UV-Visível e por análise cromatográfica líquida de alta eficiência. Calculou-se o tempo de meia vida e a percentagem de retenção de cor. A metodologia de superfície de resposta foi eficaz para estimar o efeito de três variáveis independentes sobre a extração de antocianinas, os ótimos valores sugeridos para a extração com ácido cítrico foram tempo de 60 min., razão de 1g / 30 mL e uma temperatura de 60°C e para a extração com ácido clorídrico foram sugeridas as mesmas condições de tempo e razão, porém a uma temperatura de 20°C. O aumento na relação copigmento/antocianinas foi evidenciado pelos efeitos batocrômico e hipercrômico. A interação das antocianinas foi significativamente afetada pela temperatura (5±3ºC e 25±3ºC) e o ambiente (luz e escuro). A estabilidade das antocianinas com adição de copigmento aumentou o tempo de meia vida e a porcentagem de retenção de cor das amostras. A estabilidade máxima foi alcançada nas amostras com adição de ácido cafeico em temperatura de 5ºC±3°C e no escuro. As antocianinas adicionadas de ácido cafeico e málico apresentaram tempo de meia vida de 242,40 ± 25,40 e 200,48 ± 12,15 dias, respectivamente, trazendo perspectivas para aplicação deste corante natural.
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Wendisch, Maria. "Nachweis der adaptiven Antwort nach Bestrahlung von Schilddrüsenzellen mit offenen Radionukliden." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-62681.
Full textAbstract:
Biologische Systeme sind in der Lage sich an eine Niedrig-Dosis-Bestrahlung anzupassen und eine geringere Sensitivität gegenüber einer nachfolgenden Hoch-Dosis-Bestrahlung zu entwickeln. Dieses Phänomen wird als adaptive Antwort bezeichnet und wurde nach der Bestrahlung mit externen Strahlungsquellen wiederholt in vivo und in vitro untersucht. Im Gegensatz dazu gibt es für die Bestrahlung mit offenen Radionukliden keine systematischen und vergleichenden Untersuchungen.
Im Mittelpunkt dieser Arbeit standen der Nachweis sowie die Analyse der adaptiven Antwort an PC Cl3-Zellen nach Bestrahlung mit den offenen Radionukliden Re-188 und Tc-99m. Die Zellschädigung wurde mit dem alkalischen Komet-Assay, zur Bestimmung des initialen DNA-Schadens und dem Koloniebildungstest, zur Ermittlung des klonogenen Überlebens, untersucht. Zur Aufklärung von möglichen Regulationsmechanismen der adaptiven Antwort wurde die Induktion und Reparatur von DSB mit dem gamma-H2AX-Immunfluoreszenz-Assay und die intrazelluläre Radionuklidaufnahme betrachtet.
In dieser Arbeit erfolgte erstmals eine systematische Untersuchung der adaptiven Antwort nach Bestrahlung mit offenen Radionukliden in vitro. Insgesamt zeigen diese Ergebnisse, dass nach Bestrahlung mit offenen Radionukliden eine adaptive Antwort ausgebildet wird. Diese ist von der Strahlenqualität während Vor- und Folgebestrahlung sowie der Art der DNA-Schädigung und den initiierten Reparaturprozessen abhängig. Weiter Einflussfaktoren sind die Erholungszeit, die Vorbestrahlung (Dosis, Strahlenqualität) und die Art des Schadensnachweises. Neben den bekannten Regulationsmechanismen wurde erstmals die Reduktion der intrazellulären Radionuklidaufnahme als weitere mögliche adaptive Antwort beschrieben.
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Iborra, Bernad María del Consuelo. "Comparison of vacuum treatments and traditional cooking in vegetables using instrumental and sensory analysis." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/32953.
Full textAbstract:
Los objetivos de la presente tesis fueron comparar el efecto de tres técnicas de cocción en
varios vegetales y su selección para cada producto estudiado. Para ello, los trabajos realizados
han considerado los cambios en las propiedades físico-químicas, nutricionales, sensoriales y la
microestructura. Asimismo, como respuesta al reto de aplicar tratamientos equivalentes en
firmeza con diferentes técnicas de cocción se ha propuesto una metodología que combina los
diseños experimentales de superficie respuesta (RSM) con análisis instrumentales y
sensoriales.
Los tratamientos térmicos estudiados fueron la cocción tradicional (TC¿ agua hirviendo a 100
°C) junto con dos tratamientos que utilizan el vacío en el procesado: el cook-vide (CV¿ cocción
a vacío continuo donde los alimentos están en contacto con agua hirviendo a baja presión) y el
sous-vide (SV¿ cocción de alimentos previamente embolsados a vacío donde el alimento está
separado del agua de cocción). Los vegetales objeto de estudio fueron la patata morada
(Solanum tuberosum L. var. Vitelotte), la judía verde (Phaseolus vulgaris L. cv. Estefania), la
zanahoria (Daucus carota L. cv. Nantesa) y la col lombarda (o repollo colorado) (Brassica
oleracea convar. capitata var. capitata f. rubra).
Considerando muestras con firmeza instrumental similar y las propiedades nutricionales y
sensoriales (especialmente aroma y sabor), incluyendo la aceptación del consumidor, se
recomienda la cocción SV para los vegetales estudiados, excepto para la zanahoria. En el caso
de este vegetal el cocinado tradicional (100 °C) mantiene la aceptabilidad del consumidor y
aumenta la extracción de los ß-carotenos por lo que se considera más recomendable que el
SV.Iborra Bernad, MDC. (2013). Comparison of vacuum treatments and traditional cooking in vegetables using instrumental and sensory analysis [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/32953
TESIS
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Gonzalez, Angelica Maria Patiño. "Avaliação da administração intravenosa de solução salina hipertônica 7,5% como estratégia para melhorar a perfusão do tumor e a entrega de moléculas em modelos tumorais em camundongos." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/5/5155/tde-03032017-094509/.
Full textAbstract:
A administração intravenosa de solução salina hipertônica (HSS) induz alterações sistêmicas circulatórias como o aumento da pressão arterial e do volume circulante efetivo, além de ter efeitos locais sobre a microcirculação. No presente estudo foram analisados os efeitos produzidos pela administração de solução salina hipertônica 7,5% sobre a hemodinâmica do tumor através de estudos de imagem funcional e posteriormente, foi avaliado o seu potencial de otimizar a entrega de moléculas no tumor. A velocidade do sangue nos vasos tumorais estimada por Ultrassom Color Doppler foi aumentada após a injeção da HSS em comparação ao controle PBS em tumores de melanoma (B16F10 (p=0,019), SK-MEL-147 (p =0,028)) e de mama (4T1 (p=0,015)). Este mesmo efeito não foi observado nas artérias segmentarias do rim (p=0,476). Ultrassonografia com contraste por microbolhas (CEUS) foi realizada em xenoenxertos de tumor de melanoma (B16F10), carcinoma de cólon (HCT-116) e mama (MDA-MB-231), e como controle foi realizada imagem no rim e no músculo nos animais portadores destes tipos tumorais (n=3 por grupo). Após a injeção da HSS, o volume relativo de sangue foi aumentado nos tumores B16F10 (p=0,022) e HCT-116 (P = 0,039), mas o mesmo não foi observado com o tumor MDA-MB-231 (p=0,186). Além disso, não houve alterações nos tecidos normais (rim p = 0,957; músculo p = 0,104). Todos os testes estatísticos foram bicaudais. Quando a HSS foi utilizada como veículo para entrega de moléculas de baixo peso molecular como cisplatina e doxorrubicina no tratamento de tumores B16F10 e 4T1 respectivamente, não houve aumento da eficácia terapêutica, avaliada através do crescimento tumoral e peso dos tumores. O efeito da HSS sobre a retenção de macromoléculas nos tumores SK-Mel- 147 e 4T1, avaliado através de imagem por epifluorescência do contraste ótico IR-783, não foi suficientemente notório para rejeitar a hipótese nula. Assim, a HSS induz um aumento transitório na velocidade do sangue e do volume sanguíneo, de maneira relativamente seletiva para os tumores avaliados, com exceção do MDA-MB-231. Portanto, esta pode ser uma estratégia útil para aumentar a entrega de moléculas e otimizar tanto o efeito terapêutico, quanto o diagnóstico por imagemIntravenous administration of Hypertonic saline solution (HSS) induces systemic circulatory changes including blood pressure rising, effective circulating volume increase as well as local effects on microvasculature. We analyzed the effects produced by Hypertonic Saline 7,5% administration on tumor hemodynamics through functional imaging studies as well as whether it enhances molecular delivery in tumor tissue when used as a vehicle. Blood velocity assessed by Color Doppler Ultrasound was increased after HSS injection compared to PBS in the following tumors: B16F10 (p=0,019), SKMEL- 147 (p=0,028) and 4T1 (p=0,015). No statistical difference was observed on the segmental kidney arteries (p=0,476). Dynamic Contrast enhanced ultrasound (CEUS) was done in B16F10, HCT-116 and MDA-MB-231 tumor xenografts, kidney and muscle tissues (n=3 per group). After HSS injection, relative blood volume was increased in B16F10 (p=0,022) and HCT-116 (p=0,039) but not on MDA-MB-231 (p=0,186). Changes on normal tissues were not statistically different (kidney p=0,957; muscle p=0,104). All statistical tests were two-sided. Administration of HSS as a vehicle for low molecular weight molecules cisplatin and doxorubicin in the treatment of B16F10 and 4T1 tumors respectively had no significant improvement of therapeutic efficacy, estimated by tumor growth and tumor weight measurements. Effect of HSS over retention of macromolecules in tumors SK-Mel-147 and 4T1, evaluated by epifluorescence imaging of the optical contrast IR- 783 was not large enough to reject the null hypothesis. HSS induces a transient increase in velocity of the blood as well as the blood volume that is relatively selective for the evaluated tumors with exception of MDA-MB-231. Data suggest that HSS administration might be a useful strategy to increase the delivery of molecules and optimize both therapy and diagnostic imaging
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Das, Choton Kanti. "Smart management strategies of utility-scale energy storage systems in power networks." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2019. https://ro.ecu.edu.au/theses/2209.
Full textAbstract:
Power systems are presently experiencing a period of rapid change driven by various interrelated issues, e.g., integration of renewables, demand management, power congestion, power quality requirements, and frequency regulation. Although the deployment of Energy Storage Systems (ESSs) has been shown to provide effective solutions to many of these issues, misplacement or non-optimal sizing of these systems can adversely affect network performance. This present research has revealed some novel working strategies for optimal allocation and sizing of utility-scale ESSs to address some important issues of power networks at both distribution and transmission levels. The optimization strategies employed for ESS placement and sizing successfully improved the following aspects of power systems: performance and power quality of the distribution networks investigated, the frequency response of the transmission networks studied, and facilitation of the integration of renewable generation (wind and solar). This present research provides effective solutions to some real power industry problems including minimizationof voltage deviation, power losses, peak demand, flickering, and frequency deviation as well as rate of change of frequency (ROCOF).
Detailed simulation results suggest that ESS allocation using both uniform and non-uniform ESS sizing approaches is useful for improving distribution network performance as well as power quality. Regarding performance parameters, voltage profile improvement, real and reactive power losses, and line loading are considered, while voltage deviation and flickers are taken into account as power quality parameters. Further, the study shows that the PQ injection-based ESS placement strategy performs better than the P injection-based approach (in relation to performance improvement), providing more reactive power compensations. The simulation results also demonstrate that obtaining the power size of a battery ESS (MVA) is a sensible approach for frequency support. Hence, an appropriate sizing of grid-scale ESSs including tuning of parameters Kp and Tip (active part of the PQ controller) assist in improving the frequency response by providing necessary active power. Overall, the proposed ESS allocation and sizing approaches can underpin a transition plan from the current power grid to a future one.
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Hodzic, Amir. "Exploration du coeur d'athlète à l'aide d'outils échocardiographiques d'analyse de la déformation myocardique, des volumes ventriculaires et des flux intra cavitaires Accuracy of speckle tracking in the context of stress echocardiography in short axis view: an in vitro validation study Analysis of inter-system variability of systolic and diastolic intraventricular pressure gradients derived from color Doppler M-mode echocardiography Echocardiographic evidence of left ventricular untwisting-filling interplay Cardiovascular adaptations in American-style football players in response to the inter- season training Right ventricular global and regional remodeling in American-style-football athletes: a longitudinal 3D echocardiographic study." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMC428.
Full textAbstract:
L’athlète entrainé est un modèle physiologique d’adaptation cardiaque extrême où il est parfois difficile de faire la distinction entre le remodelage cardiaque adaptatif induit par l’exercice physique et certaines cardiomyopathies débutantes. L’échocardiographie est l’examen d’imagerie de premier choix pour l’étude du cœur d’athlète au repos et à l’effort. Les développements semi-récents du speckle tracking et de l’imagerie tridimensionnelle (3D) ont montré un intérêt clinique dans la description de la réponse cardiaque à l’exercice. Toutefois certains aspects techniques nécessitent d’être investigués. De plus, les outils de post-traitement actuels ne permettent qu’une évaluation incomplète de l’hémodynamique cardiaque et de l’analyse morphofonctionnelle régionale. Dans un premier temps, à l’aide d’un modèle expérimental mimant l’échocardiographie de stress, nous avons démontré la validité du speckle tracking pour l’étude de la déformation régionale dans une large gamme de fréquences de déformation en comparaison à la technique de référence par sonomicrométrie. Secondairement, nous avons étudié chez des sujets volontaires sans cardiopathie avérée (athlètes et non athlètes) une méthode de quantification non invasive des gradients de pressions intraventriculaires (GPIVs) pour l’évaluation de la fonction systolique et diastolique ventriculaire gauche (VG), qui est basée sur le post-traitement des données de vitesses de flux intra cavitaires acquises en mode TM Doppler couleur. Nous avons montré que cet indice hémodynamique était facilement accessible, et bien corrélé au mécanisme de succion VG. L’analyse des mesures de GPIVs a mis en évidence une variabilité inter-constructeur qui était principalement liée aux différences de résolution de l’image Doppler couleur. Enfin, en utilisant une approche échocardiographique multiparamétrique (speckle tracking, GPIV, et volumes 3D), nous nous sommes intéressés à caractériser la relation physiologique entre le type d’entrainement physique et le remodelage cardiaque gauche et droit au sein d’une équipe de footballeurs canadiens suivie de manière longitudinale. L’analyse régionale des modifications morphologiques et fonctionnelles du ventricule droit (VD) induites par l’exercice chronique a été réalisée à l’aide d’un nouvel algorithme de post- traitement des acquisitions 3D permettant une segmentation tripartite (apex, chambre d’admission, chambre d’éjection) des volumes VD en échocardiographie. En conclusion, les outils de post-traitement échocardiographique étudiés dans ce travail pour l’analyse globale et régionale de la fonction et de la morphologie cardiaques semblent applicables au cœur d’athlète et pourraient avoir un intérêt dans la caractérisation du remodelage cardiaque physiologique à l’exerciceThe trained athlete is a physiological model of extreme cardiac adaptation for whom the distinction between adaptive cardiac remodeling induced by chronic exercise and certain early cardiomyopathies can be difficult to assess. Echocardiography is the first-choice imaging modality to evaluate the athlete’s heart at rest and during exercise. Semi-recent developments in speckle tracking and 3D ultrasound imaging have shown clinical interest in the echocardiographic description of the athlete’s heart. However, some technical aspects require further investigation. Moreover, current post-treatment tools provide only a partial analysis of cardiac hemodynamics and regional myocardial function. Using an experimental model mimicking stress echocardiography, we first demonstrated the validity of speckle tracking in comparison to sonomicrometry to measure regional deformation in a large range of deformation rates. Secondly, we studied in volunteers without heart disease (athletes and non- athletes) the reliability of a method to assess non-invasively the left ventricular (LV) systolic and diastolic intraventricular pressure gradients (IVPGs) based on post-processing of intracardiac flow velocity data acquired using color Doppler M-mode. This hemodynamic index was highly feasible and well correlated with LV suction. Analysis of IVPG measurements revealed inter-vendor variability which was mainly related to differences in color Doppler image resolution. Finally, using a multiparametric echocardiographic approach (speckle tracking, IVPGs, and 3D volumes), we studied the physiological relationship between the type of exercise training and the left and right cardiac remodeling among a Canadian football team followed longitudinally. The regional analysis of right ventricular (RV) morphological and functional changes induced by chronic exercise was performed using a new computational method based on 3D echocardiography that volumetrically parcellated the RV into three segments (apex, outlet, and inlet). In conclusion, our workhas shown that the echocardiographic post-processing tools studied for the global and regional analysis of cardiac function and morphology apply to the athlete’s heart and could be useful in the characterization of the exercise-induced cardiac remodeling
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"Chromatic Imaginaries: Color Constructs the Human Experience." Tulane University, 2018.
Find full textAbstract:
Color is powerful. As a physical element in our world that is created in our minds, it is uniquely visceral yet intangible. Color has objective rules, finite categories, subjective interpretations, and embedded meanings. Color can calm, activate, soothe, shock, welcome, stimulate, and rejuvenate. Yet color is often relegated to the realm of ornament, and its powerful performative properties are underutilized in the realm of architecture. If its unique potential was instead realized, color could be used to communicate emotionally and spatially, subjectively and universally. The properties of color have been analyzed through scientific investigation and artistic exploration for their spatial, psychological, and emotional effects. In the realm of painting, color is a fundamental way to imply space on a canvas and stimulate response from viewers. Scientifically, color has been the subject of countless studies for its effects on human behavior as well as its physical properties and universal significance. Theories merging from these fields can be utilized to create a richer, more intentional relationship between color and architecture. Much more than a coat of paint, color can be used to construct the architectural experience. It can be equated with other fundamental elements, such as form, light, and context, as a tool in the creation of space. Through its interaction with these elements, color can amplify spatial intentions, shape perception, and augment the interaction between humans and the built environment. Emphasizing architectureÕs ability to shape the human experience, this thesis constructs a future of architecture where color is fundamental.Yes
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Huang, Wei Ming, and 黃威銘. "Receptive Field Structures of Color-Responsive Neurons in Macaque Monkey V1." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/x7qkxe.
Full textAbstract:
碩士國立臺灣大學
心理學研究所
106
Spatial receptive fields have been studied to understand the properties of color- and luminance-responsive neurons in primary visual cortex (V1). In macaque V1, many color-responsive neurons are highly selective for orientation and spatial frequency. One might predict that these highly selective neurons should have receptive fields with multiple and elongated sub-regions (like simple cells). However, previous studies showed that this was not the case — many sharply tuned neurons had blub-like and less elongated receptive fields. Here we measured spatial receptive fields of V1 color-responsive neurons with two different stimulus ensembles: Hartley gratings and binary sparse noise. Both stimulus ensembles consisted of equiluminance red/green colors. Receptive fields were calculated by reverse correlation and fitted with the 2-D Gabor function. Color-responsive neurons were separated into double- and single-opponent cells based on their spatial frequency tunings. We found that double-opponent cells had significantly higher aspect ratios and spatial frequencies than single-opponent cells. The agreements between receptive field properties and orientation tunings were established only in Hartley grating condition but not in sparse noise condition. Double-opponent cells were also found to have lower modulation ratios. Furthermore, most color-responsive cells had red-preferring receptive fields. In summary, double- and single-opponent cells differed in their receptive field properties. For those neurons that were well tuned for orientation and spatial frequency, the tuning properties could be well predicted by Hartley maps but not sparse-noise maps. Our results supported the idea that double-opponent cells might serve as detectors of color edge in the equiluminance scene.
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Tseng, Chung-Long, and 曾慶龍. "Spectral response and stability study of color sensor." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/79919515933658241691.
Full textAbstract:
碩士國立交通大學
電信研究所
85
The color correction of color gamut can be accomplished directly by matrix operations. Linear matrix transforms may be regarded as recom- binations of the spectral responses of the scanners. Common scanners usually process color signals via three filters corresponding to the three tristimulus values. Thereby, a 3 by 3 matrix representing the color correction function is needed for the scanners. If higher order polynomials are used, a 3 by P matrix is needed, where P designates the number of the terms of the polynomials. When we use the higher or- der polynomials, we would find that recombinations of the spectral re- sponses of the filters of the scanners are highly correlated with the samples. In other words, the samples affect not only the proportions of the recombinations of the spectral responses of the filters, but also how these spectral responses combine. This thesis compares linear combination with higher order polynomials.
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Chung-Yi, Tsai, and 蔡鐘毅. "Color Response analysis by EEG and Visual Evoked Potential." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/51180691131319959968.
Full textAbstract:
碩士亞洲大學
數位媒體設計學系碩士班
99
The color, shape and size are main factors to people to define an object in daily life.The color of an object depends on both the physics of the object in its environment and the characteristics of the perceiving eye and brain. The colors result from neural responses in human’s visual neural systems, whose process and activities can be understood through human electroencephalogram (EEG). In terms of patterns, human perception of colors is influenced by patterns and sizes; patterns, colors and sizes bear close relations and interact with each other. Therefore, this study explored the reaction of EEG to visual stimuli aroused when people perceive combinations of different colors,patterns and sizes. The study results indicated that: (1) Different colors (R, G, B), different patterns (checkerboard, horizontal stripes, and concentric circles) and different size has significant effects on four peaks of EEG (N1、N2 latency and P1、P2 amplitude).(2) There has significant differences in EEG with higher P2 amplitude response of checkerboard and horizontal stripes by red color than the other two colors (checkerboard: red > blue > green; horizontal stripes: red > green > blue); for concentric circles, there was higher P2 amplitude response by blue color than green, the lowest was red color (blue > green> red).
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Yang, Cheng-Chien, and 楊政謙. "Novel Algorithm for LCD Color and Gray Level Response Time Adjustment." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/11138813712162268104.
Full textAbstract:
碩士國立臺灣科技大學
電子工程系
95
Recently, LCDs have become the most popular display devices because of their low power consumption and compact size. LCD applications are widely used in many aspects, such as LCD TVs, PC monitors, and mobile phones. But to replace traditional CRT displays, there are still some questions should be solved. In this paper, we purposed novel algorithms for the adjustment of LCD color characteristic and gray level response time. By connecting the hardware, the colorimeter and photo sensor, the color characteristics and response time can be measured quickly. Measurement data is used for the analysis in the algorithm, and after the analysis, the new LUTs are derived. Users can set related parameters on the user interface developed by visual basic in the windows environment. According to these settings, the LCD panel used for this experiment can be automatically adjusted. The experimental result would be the best method to determine whether the algorithm is correct or not. After our adjustment, the correlated color temperature can be roughly equal to the target color temperature and the average gray level response time is also under the target response time.
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Ly, Bao Chau. "The Effects of Visual Color Stimuli on Zebra Finch Behavior and Stress Response." 2014. http://scholarworks.gsu.edu/biology_hontheses/8.
Full textAbstract:
The Australian Zebra Finch, Taeniopygia guttata, is a common vertebrate model for understanding behavioral, neurological, and physiological changes across the life span. The goal of this study was to determine if color in the environment can act as a stimulus and activate the zebra finch stress response. Zebra finches are diurnal and have color vision. Their plumage coloration is sexually dimorphic and they show behavioral changes to color; females prefer males with redder beaks, and both sexes show individual color preferences for materials in nest building. This experiment was conducted to test whether or not a novel color in the environment can elicit a stress response. A colored poster board was introduced to the adult zebra finches’ habitat, and behavioral changes were measured immediately and then again after twenty four hours. In addition, plasma corticosterone (CORT), the main avian stress hormone, concentrations were measured twenty four hours after introduction of the color stimulus. The introduction of the color stimuli resulted in immediate behavioral changes in the birds and increased activity was observed with the addition of green, blue, and red stimuli and decreased activity with the addition of yellow. However, after twenty four hours there were no changes in behavior or plasma CORT levels for any of the colors. These findings suggest that zebra finches show varied behavioral responses to novel stimuli based on color differences and that these changes are temporary.
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Bui, Long Minh Giao. "Staphylococcus aureus: stress response and its roles in pathogenesis." Thesis, 2015. http://hdl.handle.net/2440/99094.
Full textAbstract:
Staphylococcus aureus has an incredible ability to survive, either by adapting to environmental conditions or defending against exogenous stresses. In part this ability is provided by the breadth of lifestyles or modes of growth S. aureus can adopt. Key to an understanding of chronic, persistent and relapsing S. aureus infections is determining the basis for their switch to quasi-dormant lifestyles. Across different bacterial species these alternative lifestyles form a population known as persister cells. It has been proposed that while within their host, a sub-population of S. aureus survives in host-generated and therapeutic antimicrobial stress by inducing biofilm growth on host tissue or by growing as Small Colony Variants (SCVs). These stresses include limited nutrition, reactive oxygen species, reactive nitrogen species, other toxic metabolites, cationic peptides, fluctuating pH and osmolarity, several antibiotics, and others that are generated from various host tissues and niches during an infection. In a multicellular biofilm, the metabolically quiescent bacterial community produces a highly protective extracellular polymeric substance (EPS). The EPS is variously composed of polysaccharides, extracellular DNA (eDNA), and protein, and its protection results in persistent bacterial infections. S. aureus forms biofilms in different human tissues, and to some degree the associated EPS has been studied. Alternatively, there exists a diversity of phenotypes and cell-types that translate to a particular bacterial lifestyle. In clinical settings, SCV of S. aureus have been observed for many years and when cultured, these cells are non-pigmented colonies ca. 10 times smaller than their counterparts on agar plates. Mutations in hemin and menadione biosynthesis (hemB and menA) have produced laboratory-generated SCVs and these and other mutations have been studied extensively. The presence of gentamicin has also been shown to impede S. aureus metabolism and results in SCVs. Both methods result in stable forms of SCV but are artificially generated. Various genotypic factors (single nucleotide polymorphisms, mutations, gene deletions) have been identified to attempt to characterize S. aureus SCVs as well as environmental stresses are also considered to be important inducers. Our project was aimed to investigate the lifestyle switching of S. aureus clinical isolates as a stress response to environmental stresses that help these organisms to survive. The results showed that S. aureus clinical isolates had relatively similar growth rates but were different in their response to chemical stresses. There were specific strains that responded to stresses by changing their lifestyles to form a biofilm and/or SCVs in harsh conditions (but still sub-lethal levels of stress) but not in lower levels of stress. These results implied that phenotype switching depends on bacterial and host factors and suggests some specific strains may possess a unique pathway involved in surviving when stressed. In addition, studying native characteristics of SCV has been problematic due to their reversion to the parental, rapid growing lifestyle. Using specific host-representative, steady-state growth conditions with low nutrients and growth rates over a prolonged time with methylglyoxal - a naturally resident chemical that is found in the host-pathogen environment, we uniquely induced a S. aureus clinical isolate (WCH-SK2) into a stable SCV cell-type. The stable SCV phenotype did not revert after numerous cycles of subculturing and analysis revealed it possessed a metabolic and surface profile different from either previously described SCV or biofilm cells. The existence of the stable SCVs was verified and its features were analyzed by genomic, transcriptomic and surface protein profile studies. Stable SCVs produced an extracellular matrix of protein and extracellular DNA; but not polysaccharide. Compared to its parental cell-type, the stable SCV cells increased expression of certain surface proteins (such as Ebh; host extracellular matrix binding protein homologue) and lantibiotic synthesis while down-regulating factors that stimulate the host immune response (leukocidins, capsule, carotenoids). This cell-type is consistent with a lifestyle protected by a matrix and hidden from immune responses. Genome sequencing revealed a set of genetic changes from the parental to stable SCV cell-type, including the transcription factors RsbB and MrgA, as well as a change in the methylome. Collectively, our data shows that there is heterogeneity within a S. aureus population as shown by a diverse scope of cell-types; by growing the cells in conditions that resemble long-term survival in the host, colonization or persistence, we have identified a previously unnoticed S. aureus lifestyle. These stable SCV are molecularly distinct in nature to SCV or biofilm cells and this cell-type provides a new understanding of S. aureus persistence in the host.Thesis (Ph.D.) (Research by Publication) -- University of Adelaide, School of Biological Sciences, 2015.
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Yang, Tao, and 楊濤. "Highly response multi color quantum well and superlattice infrared photodetector with grating structure optimization." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/36jve4.
Full textAbstract:
碩士國立臺灣大學
生醫電子與資訊學研究所
105
Quantum wells Infrared photodetector have been widely used in many fields, such as astronomy, medical, construction, military, security systems and etc. In our study, superlattice structure is added in order to enhance light absorption efficiency. Grating structure can also improve responsivity. The effect of grating system not only can concentrate light energy and then improve the photocurrent, but also can greatly increase its absorption in the active layer. Superlattice structure can help electrons easily excited by photons, which make our device can be operated at low bias voltage. Due to the small resistance, the dark current can be effectively reduced and then reduce the noise generation. Another study is to enhance responsivity of the photo detector by changing grating depth. We find that as the period of grating structure is fixed at 2μm, the relationship between the grating depth and the responsivity is not an increasing function. According to the results, the optimal value of the responsivity is detected when the grating depth is 1.3 μm. Compared with the devices without the grating structure, our best device had 2.5 times of the gain. The maximum operation temperature of our best device is measured at 83K.
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林慈惠. "An Application of Response Surface Methodology to Improve TFT-LCD Color Filter Process Capability." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/04927242049721965942.
Full textAbstract:
碩士國立交通大學
管理學院碩士在職專班工業工程與管理組
95
There is a tendency towards colorized Thin Film Transistor Liquid Crystal Display (TFT-LCD) undoubtedly. The color filter, which contains three fundamental colors of red, green, and blue, is an important and essential raw material for TFT-LCD. One panel of TFT-LCD is assembled by a pair of the same size of TFT Array and color filter, therefore, color filter with good quality is very important, it is significant influence to the performance of TFT-LCD. In the process of TFT-LCD assembly, the supports between thin film transistor and color filter substrate depend on the uniform distribution of spacer, it also keeps the gap between thin film transistor and color filter for injection liquid crystal. The content of photo spacer is photosensitive resin, photo spacer size and photo spacer precision can be controlled since it is manufactured by the mature photolithography process on the black matrix of color filter, one of the advantages of photo spacer is to prevent moving of bead type spacer to keep the good uniformity of cell gap, it also prevents light leakage around the spacer to get higher contrast. This research focuses on the problem of photo spacer process of color filter and builds two steps Design of Experiment method model. The first step is considering the all factors that will inference photo spacer process, apply the factional factorial experiment method to find out the critical factors. The second step applies Response Surface Methodology with Central Composite Design, the purpose is to find the optimum parameters setting and suitable process operation range to ensure process index capability.
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Boon, Mei Ying Optometry & Vision Science Faculty of Science UNSW. "Maturation of the transient chromatic (L-M) visual evoked potential: insights from linear and nonlinear analysis." 2007. http://handle.unsw.edu.au/1959.4/40653.
Full textAbstract:
Introduction: Psychophysical and electrophysiological techniques have shown that chromatic contrast sensitivity improves between infancy and adolescence. In adults, electrophysiological and psychophysical methods usually agree. However, in infants electrophysiological techniques may underestimate ability to see chromatic contrast (Suttle et al., 2002). It is not known if the discrepancy between electrophysiological and psychophysical methods continues during childhood nor whether the chromatic VEP can be used as an indicator of colour perception in children. Purpose: To investigate the transient L-M chromatic visual evoked potential and its ability to indicate perception (psychophysical thresholds) of chromatic stimuli in children and adults. In particular, to determine whether a discrepancy between VEP and psychophysical L-M thresholds exists during childhood and if so, to gain some understanding about the nature of the discrepancy. Methods: Transient chromatic VEPs were recorded in children (aged 4.5-13 years) and adults (aged 20-40 years). VEP thresholds were compared with psychophysical thresholds (within-subjects comparison). Because the VEPs of the children were less intra-individually repeatable in morphology than those of the adults, post-hoc objective analysis of the VEPs, linear (Fourier) and nonlinear dynamical (Grassberger and Procaccia's (1983) correlation dimension) analyses, was conducted. Results: VEP and psychophysical estimates of chromatic contrast thresholds agreed using a variety of methods in the adults. In the children, however, the objective methods of assessment (extrapolation from Fourier-derived amplitudes and the correlation dimension) were more accurate than the methods that employed subjective evaluations of VEP morphology. Conclusion: The L-M transient chromatic VEPs of both children (aged 4.5-13 years) and adults appear to contain chromatic information, even in the absence of repeatable VEP morphology and should therefore be able to indicate chromatic perception (psychophysical thresholds). However, the chromatic information may be present as a nonlinear dynamical signal, which may require objective methods (Fourier analysis, the correlation dimension) to reveal the chromatic signal. The greater intra-individual variability of VEP morphology in children compared to adults may reflect poorer precision when switching between cortical states in children's brains. Alternatively, interactions between the immature visual system of the children and their general EEG may occur. Children's VEPs should therefore be interpreted differently to adult VEPs.
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Dooley, Robert H. A. "The response of rainbow trout Salmo gairdneri to lures with special references to color preference." Thesis, 1989. http://hdl.handle.net/2429/18699.
Full textAbstract:
The response of rainbow trout (Salmo gairdneri) to lures was investigated in trolling experiments at Loon Lake, British Columbia. The "action" of a lure was found to be an important parameter in determining its efficiency: of four actions tested, the flatfish caught the greatest number of fish. Although the color of lure was not significant, red lures were more efficient than yellow, green, and blue, and more efficient than various color patterns of red and white. The presence of a dodger with lures did not affect their efficiency, but larger fish were caught. No size selection occurred with either colors or actions of lures. In laboratory feeding experiments using dyed trout eggs as food, red was selected first or second more often than yellow, green, or blue. The color of background against which the fish were fed, and individual differences among fish caused significant changes in the preference shown for various colors of food. Combining two colors also affected the selection intensity, depending upon the contrast between the two colors. Preferences for different colors of food were not influenced by the hunger level of the fish, measured in terms of the quantity of food in the fish's gut. In the course of the experiments it was incidentally observed: (1) that rainbow trout possess a striking ability to match the hue of their skin (mainly in the dorsal region) to that of the background in which they are kept; (Z) the color of background affects the activity level of rainbow trout: yellow produces the highest level of activity and green the lowest.Science, Faculty of
Zoology, Department of
Graduate
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李郁德. "The effects of color combination on subjective preference glance legibility and EEG response of symbols." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/28897151509543620628.
Full textAbstract:
碩士國立臺灣科技大學
工業管理系
92
Two experiments were conducted to investigate the effects of color combination on subjective preference, glance legibility and EEG response of symbols. The first experiment evaluated subjective preference of target/background color combinations of the symbols. The result showed that white was rated greaten than other colors. The more preferable color combinations were black/white, white/blue and red/white. while red/purple and white/yellow was less preferable. A significantly positive correlations (r = 0.57). was found between subjective preference and color difference of color combinations. The second experiment investigated the effects of color combinations on glance legibility and EEG response. The results showed: 1.The color combinations of greaten subjective preference had better glance legibility . 2.The latency of P100 for color combinations of greaten subjective preference was faster than those of less subjective preference. 3.The mean amplitude of P300 was larger when the duration of stimulant presentation was shorter. The result of this study showed that color combinations had significant effects on glance legibility, subjective preference and EEG.
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Wang, Nai-Wei, and 王乃瑋. "The Emotional Response to Illumination and Color Temperature of Lighting Installation on the Urban Park." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/71579307771881877429.
Full textAbstract:
碩士國立臺灣大學
園藝學研究所
85
The purpose of this study was to explore the influence of color temperature and illumination toward the user''s emotional responses of lighting facilities on urban park. The Ta-An Park and the Youth Park were chosen as the research sites about different color temperature, while two similar spots in these two parks were selected to compare the effect of different illumination under the control of color temperature. Data was collected by field-interview. Not only the respondents'' emotional responses were examined with the adjective pair, but also examined the relationship between factors of lighting and users. Statistic methods were factor analysis and one-way ANOVA. The main results are summarized as follow: 1.The results of factor analysis and one-way ANOVA toward color temperature under the emotional responses structure of "boredom-dull", "gloomy-cold", "surprised-active", "ugly-disordered" indicated significant difference. 2.Under two environments of color temperature, the results of one-way ANOVA toward four types of emotional responses respectively were: to the "boredom-dull" response, the average evaluation of Ta-An Park was negative while Youth Park was positive, to the "gloomy-cold" response, the average evaluation of Ta-An Park was negative while Youth Park was positive; to the "surprised-active" response, the average evaluation of Ta-An Park was positive while Youth Park was negative; to the "ugly-disordered" response, the average evaluation of Ta-An Park was positive while Youth Park was negative. 3.The results of factor analysis and one-way ANOVA toward different illumination under the emotional responses structure of "boredom-dull", "gloomy-cold", "surprised-active", "ugly-disordered" indicated significant difference. 4.The relationship between high and low illumination under four types of emotional responses above-mentioned in Ta-An Park was that different illumination leads to significantly different emotional responses within "surprised-active" and "ugly-disordered", it means different illumination will influence the emotional responses of "surprised-active" and "ugly-disordered" under warm color temperature. And in Youth Park, the significant different between high and low illumination happened within the emotional responses of "ugly-disordered" and "boredom-dull", it means different illumination will influence the emotional responses of "ugly-disordered" and "boredom-dull" under cold color temperature. 5.The analysis about the attitudes of users with different social-economic backgrounds toward the factors of lighting environment showed no significant difference under the conditions of sex, age, and occupation. But the users with different educational level possessed significantly difference attitudes toward the brightness, styles of lantern, light color, and background settings of lighting environment.
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Hamlin, Dawn W. Ruhl Kathy L. Lee David L. "Effects of response card color and accuracy rates on speed and accuracy of teacher instructional decisions." 2008. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-2817/index.html.
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Chiang, Meng-yuan, and 江孟芫. "The impact on answering time, response rate and user experience of using color on web survey." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/b8nfnp.
Full textAbstract:
碩士國立中山大學
資訊管理學系研究所
106
Web survey has been widely used for academic research, market survey, etc. Therefore, how to improve the efficiency and performance on questionnaires becomes an important issue. This research is to find out how it impacts the answering time, response rate, and user experience when we add colors on the survey page. To examine the effect of color, two experiments of online survey had been conducted, the first experiment added the color on the option of the questions, and the second one added color on the keyword and the options of the questions. These surveys had recorded the answering time and response rate of the subject, and the user experience by user experience questionnaire(UEQ) was also measured. The results show that the use of color on survey page has no significant differences with answering time and response rate. However, there are some scales of user experience have significant differences with the use of color on survey page.
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Chen, Bo-Yu, and 陳伯瑜. "Fabricating novel multifunctional fluorescent responsive polymers-based ES nanofibers that possess dual color fluorescence emissions for Fe3+ Ions and pH sensing." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/596j77.
Full textAbstract:
碩士國立臺北科技大學
有機高分子研究所
103
In the study, we fabricated a fluorescence resonance energy transfer (FRET)–based electrospun (ES) nanofibers that possess dual color ratiometric fluorescence emissions for Fe3+ ions and pH sensing from the responsive fluorescent random copolymers blends, poly(HEMA-co-NMA-co-NBD)/SRhBOH, and investigated the efficiency of different probe content on the probing sensitivity of Fe3+ ions and pH. A Rhodamine derivative of Fe3+-recognizing fluorescent probe (SRhBOH) (acceptor) and green fluorescence emission monomer (NBDOMA) (donor) were synthesized at first. The fluorescence emission of SRhBOH is highly based on both of pH-dependent and Fe3+-detected solutions, i.e, non-fluorescence emission in neutral media or without Fe3+ ions (spirolactam form), but highly fluorescence emission in acidic or the presence of Fe3+ ions (ring-opened acyclic form). The ES nanofibers were prepared from the responsive fluorescent copolymer blends, poly(HEMA-co-NMA-co-NBD) blending rhodamine B derivative (SRhBOH). The copolymers were synthesized via free radical polymerization of initiator 2,2′-azobis(2-methylpropionitrile) (AIBN), hydrophilic 2-hydroxyethyl methacrylate (HEMA), cross-linked N-methylolacrylamide (NMA) and green fluorescence emission monomer (NBDOMA) (donor). Thus the on/off switching of FRET process can be modulated by solution pH and Fe3+ ions. The results indicate that multifunctional ES nanofibers with a high sensitivity toward pH and metal-ion for environmental sensory devices.
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Baqui, A. A. M. Abdullahel. "Characterization of the response of GM-CSF supplemented THP-1 human monocytes to LPS of oral microorganisms." 1996. http://catalog.hathitrust.org/api/volumes/oclc/47363636.html.
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Blom, Nathan. "Multimodal Hermeneutics: Aesthetic Response to Literature in the English Language Arts Classroom." Thesis, 2020. https://doi.org/10.7916/d8-zy81-8d80.
Full textAbstract:
This narrative inquiry explores the implementation of multimodal, aesthetic responses to literature in my 12th grade English Language Arts classroom during the spring of 2018. Specifically, the study examines a unit of study for the novel The Color Purple, in which student received arts-based instruction from three different guest teaching artists and were asked to create multimodal final projects that expressed their understanding of the novel.
Informed by social semiotic multimodality, the aesthetic theories of Dewey and Rosenblatt, and Bakhtin’s dialogism, this dissertation investigates the ways in which multimodal response to literature serves as a mechanism for making meaning and relevance for students. In light of the dominance of verbocentric modalities of constructing and expressing meaning within institutional schooling, this study explores the possibilities of non-verbocentric modalities and their potential role within the ELA classroom.
Examining my data – field notes, audio recordings, video recordings, student surveys and student artifacts – through the lenses of the creation-reflection semiotic cycle (Dewey), and of modal affordances and modal fixing (Kress), I conclude that multimodal response can provide students with important mechanisms for understanding and engaging with literature. Specifically, I lay forth guiding principles for anchoring multimodal response to literary meaning, and for using multimodal response to invite students into the discourse community of the classroom.
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Brettingham-Moore, K. "Defining the molecular events required for GM-CSF gene activation in T cells." Thesis, 2007. https://eprints.utas.edu.au/19238/1/whole_Brettingham-MooreKate2007_thesis.pdf.
Full textAbstract:
Granulocyte macrophage colony stimulating factor (GM-CSF) is a potent regulator of
haemopoiesis and is vital for immune function. GM-CSF is rapidly, but transiently activated
in response to T cell activating signals. It is now well established that activation of the GM-CSF
gene in T cells is accompanied by distinct changes in chromatin structure across the
promoter region. The aim of this thesis was to investigate these chromatin remodelling events
and their association with gene transcription.
Analysis of GM-CSF promoter accessibility and transcription in response to various
pharmacological stimulations demonstrated that the processes of transcription and promoter
chromatin remodelling were distinct, with each requiring different factors and signals. While
chromatin remodelling was found to be dependent on factors activated downstream of PKC
signalling, transcription required both PKC and calcium signalling pathways. Nuclear
activation of the NF-ĸB transcription factor, c-Rel was strongly correlated with chromatin
remodelling events. In contrast NFAT transcription factors were demonstrated to be required
for GM-CSF transcription but not chromatin remodelling. In addition, remodelling of the
GM-CSF promoter was found to be relatively stable in contrast to the more transient profile
observed for transcription.
The ATPase component of the SWI/SNF chromatin remodelling complex has
previously been shown to associate with the GM-CSF promoter in vitro. To determine
whether Brg1 was involved in activation of the GM-CSF gene in vivo, T cells were
transfected with an ATPase defective Brg1 mutant construct. Analysis of these cells
demonstrated that efficient activation of the GM-CSF gene is dependent on Brg1.
Surprisingly, chromatin immunoprecipitation experiments revealed that Brg1 is bound to the
GM-CSF promoter in resting T cells and is depleted concomitant with chromatin
remodelling. These data lead to the hypothesis that Brg1 is involved in forming a basal
chromatin state that is transcriptionally competent. In support of this, Brg1 is not bound to
the GM-CSF promoter in B cells, which do not express GM-CSF. However a competent
chromatin environment can be created in these cells by increasing histone acetylation levels.
Data presented here are consistent with a model in which the basal state of the GM-CSF
promoter is maintained in a transcriptionally competent state in resting T cells via histone
acetylation and Brg1 recruitment. Such a chromatin environment may ensure that GM-CSF
can be activated rapidly in response to T cell activation signals. Microarray analysis was
subsequently used to identify genes which may be similarly poised to respond to T cell
activation signals by the constitutive recruitment of Brg1. A number of cytokine genes were
identified as Brg1 targets. One of these, Interferon gamma (IFNy) was found to share a
similar activation profile to GM-CSF and data presented here suggests it may be regulated by
a common mechanism. As observed for GM-CSF, Brg1 is constitutively poised at the IFNy
promoter in resting EL-4 T cells and lost from the promoter concomitant with gene
activation.
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Long, Robert. "School-Wide Positive Behavior Support Implementation as it Relates to Referral Reduction among Students of Color in an In-school Suspension Program: Perceptions of Key Stakeholders." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10972.
Full textAbstract:
The purpose of this qualitative study was to examine a problem of practice present in an actual school district. The study examined School-Wide Positive Behavior Support Implementation as it relates to the recidivism rates of students of color in the in-school suspension setting. Over the course of one school year, the perceptions of seven middle school teachers, three parents, and two administrators were explored in a suburban middle school in Southeast Texas.
Although In-school suspension programs exist in every American public school to some degree, little research has been done in regards to the academic outcomes associated with those who are frequently placed in this campus based disciplinary alternative educational placement. In many of these "placement" many of the students assigned are not afforded access to instructional materials, supplies, or a certified teacher. Since the enactment of the federal No Child Left Behind Act (2001), the achievement gap has been discussed and studied. However, few studies have been done to understand how the current practices in in-school suspension contribute to the achievement gap specifically among students of color.
This study examined key stakeholder's perceptions of School-Wide Positive Behavior Supports, and In-school suspension as a vehicle for referral reduction and removal of middle school students from their academic setting. The participants were "key-stakeholder" parents, teachers, and administrators who educate students at Caden Middle School. Findings from this problem of practice indicated that not only was the campus not imploring consistent practices and interventions related to and promoted by the SWPBS system in the in-school suspension setting, many of the staff members teachers and administrators alike did not adhere to the philosophical tenants of the SWPBS within the general classroom setting. The research presented in the record of study, identified gaps in both perceptions and understanding among key stakeholders in regards both in-school suspension and the school-wide positive behavior support systems at Caden Middle School. Results of this from this problem of practice found a severe disconnect in understanding the purpose and rationale of SWPBS among the administrators, teachers, and parents that participated in this study. Furthermore, the variance in the "self-sense making" done by each of the stakeholder groups after campus leadership failed to communicate, support, and sustain district expectations for program implementation with fidelity. Initiatives implemented through the investigation of the questions related to this problem of practice assisted in providing relevant professional development to re-solicit teacher and staff buy-in, prioritization of organization goals, and engaging teacher leadership to re-implement SWPBS to countermand system practices that were contrary to the district's original expectations.