White cement has currently received increasing attention due to potential for use in sustainable concrete structures. Based on the U.S. Green Building Council certification practice, the LEED Green Building Rating System for New Construction and Major Renovation (LEED-NC) considers that the reflective quality of white surfaces may help to improve lighting efficiency and reduce temperature fluctuations, resulting in lower heating and cooling with reduction of related energy costs. In addition to the environmental impact, white concrete represents a valuable tool for the aesthetic acceptability of a structure, and can also offer important practical benefits in terms of safety (i.e., light reflection in the dark). In this thesis white concrete was combined with off-white rice husk ash and with a glass fibers reinforced polymer to obtain an innovative composite system able to: a) reduce the energy used for the production of the primary materials, b) decrease the temperature fluctuation in the building resulting in less energy needed for heating and cooling, and c) increase the life of the structure and thereby reduce energy usage for material disposal. It is evident that in applications where aesthetics is the driver, a great deal of attention needs to be devoted to the concrete mixture, but also to durability properties. To further improve the durability of white concrete, novel methodologies were introduced to study the corrosion mechanism of steel embedded in concrete and its effect on the color degradation of white surface. This study demonstrates the validity of the sustainable system made by white cement, OWRHA, and GFRP, and of the methodology introduce to evaluate corrosion and color degradation of reinforced concrete.

In order to investigate the temporal characteristics of cognitive processing, we apply multivariate phase synchronization analysis to event-related potentials. The experimental design combines a semantic incongruity in a sentence context with a physical mismatch (color change). In the ERP average, these result in an N400 component and a P300-like positivity, respectively. The synchronization analysis shows an effect of global desynchronization in the theta band around 288ms after stimulus presentation for the semantic incongruity, while the physical mismatch elicits an increase of global synchronization in the alpha band around 204ms. Both of these effects clearly precede those in the ERP average. Moreover, the delay between synchronization effect and ERP component correlates with the complexity of the cognitive processes.

<p><font face="TimesNewRomanPSMT"> <p align="left">The aim of this study was to investigate the color stability of two provisional restorative materials used in crown and bridge cases upon exposure to different tea staining solutions and to evaluate the effectiveness of a polishing technique in removing the tea stains from the stained provisional restorative materials.</p> </font></p>

It is widely accepted that color is perceived categorically. Categorical perception of color can be defined as the tendency to discriminate colors that are from different categories easier, quicker and more accurately than colors that are from the same category. The present study investigated whether brain activity patterns verifies the concept of categorical color perception, an instantiation of top-down influences on low-level perception. Participants performed a color discrimination task on color pairs. Three categories of color pairs are defined in the green-blue region as follows. One of the pairs was specified as cross-category pair by choosing one color from green side of the green-blue boundary and the other color from blue side. The other two pairs were featured as within-category pairs by choosing two shades of green for within-green pair and two shades of blue for within-blue pair. Crucially, the pairs varied only in hue dimension and the physical distance between each of three pairs was set to 10 degrees in CIE LCh space. Pairs on the screen are displayed adjacently or with gaps in between, to further investigate the effect of space in color discrimination. Correct responses, reaction times and fMRI BOLD signals are recorded. Behavioral findings yielded a decrementing pattern from green to blue region challenging the prediction of categorical perception argument that performance is better at green-blue boundary than both within green and blue regions. Behavioral findings also indicated that adjacent display of colors facilitated color discrimination when compared to display of colors with spatial gaps. Brain activity patterns indicated that separate neural processes might underlie these distinct behavioral differences. Although standardized with respect to the color metric, the three categories of our experiment might have involved differences with respect to difficulty levels and memory requirements. Brain activity differences reported in the within-green condition versus cross-category condition are focused on Frontal Eye Fields and Fusiform Gyrus, which is seem to be modulated by Frontal Eye Field activity / increased activation in these regions is related to enhanced visual performance and higher scores, which is consistent with significantly better performance in within-green discrimination than cross-category discrimination. For the same contrast, Parahippocampal Gyrus and Precuneus activations suggest better visual recall and behavioral improvement due to more efficient maintenance in spatial working memory for within-green discrimination than cross-category discrimination. Brain activity differences reported in the within-blue condition versus cross-category condition is focused on Superior Temporal Gyrus, which is involved in color discrimination having the role of color memory. When within-green and within-blue conditions are compared, there was differential activation in the Fusiform Gyrus, and this is the only brain activity which might be attributed to a categorical effect. This comparison also yielded activity in Medial Frontal and Superior Frontal regions concerning more confident perceptual decisions and improved performance on within-green discrimination than within-blue discrimination. In addition, spatial separation of stimuli entailed more cognitive resources to color discrimination than adjacent stimuli as suggested by Cuneus and Lingual Gyrus activations. Overall, to the best of our knowledge our study is the first to investigate the neural framework for color perception, which revealed that color perception might involve several complex sub-processes that activate memory and attention.

This thesis proposes a novel driving circuit of the RGB light emitting diodes (LEDs) for the back-light source of the liquid crystal display. In stead of employing three dc-to-dc converters, a fly-back converter with three secondary windings is used to drive RGB-LED light bars. By adjusting the duty-ratio, the fly-back converter provides compromised voltages to RGB-LEDs in accordance with the operating modes of dimming control, so as to retain current magnitudes within the acceptable values. LEDs of three colors are dimmed by regulating the duty-ratios of three active power switches individually. By changing the ratio of the average currents of the three primary color LEDs, the color temperature range of driving can reach the requests of dimming control. As compared with a consumer product using the conventional driving circuit, the proposed circuit is obviously much simpler with less components and a higher efficiency.

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.

To reproduce color images in print, the continuous tone image is first transformed into a binary halftone image, producing various colors by discrete dots with varying area coverage. In halftone prints on paper, physical and optical dot gains generally occur, making the print look darker than expected, and making the modeling of halftone color reproduction a challenge. Most available models are based on macroscopic color measurements, averaging the reflectance over an area that is large in relation to the halftone dots. The aim of this study is to go beyond the macroscopic approach, and study halftone color reproduction on a micro-scale level, using high resolution images of halftone prints. An experimental imaging system, combining the accuracy of color measurement instruments with a high spatial resolution, opens up new possibilities to study and analyze halftone color prints. The experimental image acquisition offers a great flexibility in the image acquisition setup. Besides trichromatic RGB filters, the system is also equipped with a set of 7 narrowband filters, for multi-channel images. A thorough calibration and characterization of all the components in the imaging system is described. The spectral sensitivity of the CCD camera, which can not be derived by direct measurements, is estimated using least squares regression. To reconstruct spectral reflectance and colorimetric values from the device response, two conceptually different approaches are used. In the model-based characterization, the physical model describing the image acquisition process is inverted, to reconstruct spectral reflectance from the recorded device response. In the empirical characterization, the characteristics of the individual components are ignored, and the functions are derived by relating the device response for a set of test colors to the corresponding colorimetric and spectral measurements, using linear and polynomial least squares regression techniques. Micro-scale images, referring to images whose resolution is high in relation to the resolution of the halftone, allow for measurements of the individual halftone dots, as well as the paper between them. To capture the characteristics of large populations of halftone dots, reflectance histograms are computed as well as 3D histograms in CIEXYZ color space. The micro-scale measurements reveal that the reflectance for the halftone dots, as well as the paper between the dots, is not constant, but varies with the dot area coverage. By incorporating the varying micro-reflectance in an expanded Murray-Davies model, the nonlinearity caused by optical dot gain can be accounted for without applying the nonphysical exponentiation of the reflectance values, as in the commonly used Yule-Nielsen model. Due to their different intrinsic nature, physical and optical dot gains need to be treated separately when modeling the outcome of halftone prints. However, in measurements of reflection colors, physical and optical dot gains always co-exist, making the separation a difficult task. Different methods to separate the physical and optical dot gain are evaluated, using spectral reflectance measurements, transmission scans and micro-scale images. Further, the relation between the physical dot gain and the halftone dot size is investigated, demonstrated with FM halftones of various print resolutions. The physical dot gain exhibits a clear correlation with the dot size and the dot gain increase is proportional to the increase in print resolution. The experimental observations are followed by discussions and a theoretical explanation.

Uppsala Universitet Sophie Dicksen Medie- och kommunikationsvetenskap C-uppsats Abstract Title: Communication of gender through design -A study of shapes and colors of perfumebottles and of the fonts on their labels. (Genuskommunikation genom design -En studie av form, färg och typsnitt på parfymflaskor) Number of pages: 39 (82 including enclosures) Author: Sophie Dicksen Tutor: Mats Lind Course: Media- and Communication Studies C Period: Autumn 2006 University: Division of Media and Communication, Department of information Science,Uppsala University Purpose/Aim: To study whether gender is communicated through design, and if so is the case, the aim is also to see by which aspects gender is communicated. Material/Method: 40 perfumebottles, 20 for women and 20 for men has been studied, and attributes such as their shapes, colors as well as the fonts on their labels has been analyzed in search of gender differences. An art director has also been interwiewed to receive information about genderdesign from a practical wiew. Main results: There is no difference out of a gender perspective between the colors on the bottles in aspect of lightness but colors on ladieperfumes are generally more saturated and they are also more often located among yellow, orange and red shades on the color chart while perfumesbottles for men tend to consist of yellow, green and blue colors in more unsaturated versions. The results of the study of shapes showes that there are more cubes among the male perfumes than there are in the group of womensperfumes. Concidering the study of fonts does results prove that fonts on labels of male perfumes mostly belong to the most common group of fontfamilies. This compared to perfumes for ladies where the the fonts varied between the two current fontgroups of the study, and therefore are bort rare and common. The interwiew with the art director gave that he sees differences between products for women and products for men out of a gender perspective. He claims that most perfumes for women generally have soft shapes, warm colors and scriptlike fonts with the opposite of attributes for men and he argues that those products not fitting in these genderframes are products for women looking more masculine. According to the art director,products for men are more limited when it comes to design as they would rarely approach areas that would be considered as feminine. Keywords: perfume, design, shape, color, font, gender, communication, interview

We introduce normal coordinates in Riemannspaces as a tool to construct color-weak compensation methods.We use them to compute color stimuli for a color weakobservers that result in the same color perception as theoriginal image presented to a color normal observer in the sensethat perceived color-differences are identical for both. Thecompensation is obtained through a color-difference-preservingmap, i.e. an isometry between the 3D color spaces of a colornormaland any given color-weak observer. This approach usesdiscrimination threshold data and is free from approximationerrors due to local linearization. The performance is evaluatedwith the help of semantic differential (SD) tests. / Swedish Foundation for Strategic Research through grant IIS11-0081. / European Community’s Seventh Framework Programme FP7/2007-2013 - Challenge 2 Cognitive Systems, Interaction, Robotics - under grant agreement No 247947 - GARNICS.

At the nexus of the seemingly disparate art-theoretical topics of color and the female nude is a critical consideration of phenomenology in both one of its most basic senses—as the first-person experience of perceived phenomena—and as a larger philosophical position which, through its abstraction of perception to subject-object relationships, implicates the painted figure. Specifically, this paper conflates the phenomenology of color with the transcendental phenomenology of Edmund Husserl and Maurice Merleau-Ponty in investigating empathy. Structured as a dialectic, it establishes the most prominent views of both color and the female nude—the nude as a symbolic figure, color as perceptual experience—before delving into their various points of theoretical and art-historical intersection within these categories. This analysis ultimately forms the argument that color can be a powerful tool in reclaiming the female nude figure, stimulating emotive bodies that inspire empathetic viewers and intersubjective rather than objectifying, or abjectifying, dialogues.