1,698 research outputs found
Proper Ferroelectricity in the Dion?Jacobson Material CsBi2Ti2NbO10: Experiment and Theory
No full textA diverse range of materials and properties are exhibited by layered perovskites. We report on the synthesis, characterization, and computational investigation of a new ferroelectric?CsBi2Ti2NbO10, an n = 3 member of the Dion?Jacobson (DJ) family. Structural studies using variable temperature neutron powder diffraction indicate that a combination of octahedral rotations and polar displacements result in the polar structure. Density functional theory calculations reveal that the wider perovskite blocks in CsBi2Ti2NbO0 stabilize proper ferroelectricity, in contrast to the hybrid-improper ferroelectricity reported for all other DJ phases. Our results raise the possibility of a new class of proper ferroelectric materials analogous to the well-known Aurivillius phases
Facing the Future: the Changing Shape of Academic Skills Support at Bournemouth University
No full textThis paper explores the potential impact of changes to higher education in England on student expectations, engagement, lifestyles and diversity, and outlines implications for the development of digital literacy within academic skills support at Bournemouth University (BU). We will investigate how tackling resource constraints with organisational change can also enable efficient, centralised provision of support materials that utilise networks to overcome the risk of fragmented support for digital literacy. We will also look at how changing delivery modes for support can accommodate changing student lifestyles whilst tackling a weakness of centralised support for digital literacy: that it can become detached from the student’s subject-focused academic practice. Finally we will explore how involving students in developing support can help us to face changes to student expectations and engagement whilst ensuring that materials are authentic and speak to learners in their own voice
Research on couples and couple therapy: What do we know? Where are we going
No full textThis article discusses the outcome and process research on couple therapy and integrates the articles special section "Couples and Couple Therapy " into the discussion. All tested couple treatments show statistically significant effects relative to control groups, but there are no reliable differences between different theoretical models. Moreover, all tested approaches leave substantial numbers of couples unimproved or at least still somewhat distressed. A discussion of the strengths and weaknesses of various designs concludes that within-model comparisons have been more productive in producing knowledge than between-model comparisons. Recommendations for future research include developing a technology that would make possible matching studies focusing on Aptitude × Treatment interactions. Also, there needs to be greater emphasis on basic research and prevention. Prepartion of this article was supported by Grants 5 K02 MH00868-02, 5 R01 MH43101-03, and 5 R37 MH44063-03 from the National Institute of Mental Health, awarded to Neil S. Jacobson. We thank Joan Giacomini for her help in the preparation of this article
Maximizing Research Impact Through Institutional and National Open-Access Self-Archiving Mandates
No full textNo research institution can afford all the journals its researchers may need, so all articles are losing research impact (usage and citations). Articles made “Open Access,” (OA) by self-archiving them on the web are cited twice as much, but only 15% of articles are being spontaneously self-archived. The only institutions approaching 100% self-archiving are those that mandate it. Surveys show that 95% of authors will comply with a self-archiving mandate; the actual expe-rience of institutions with mandates has confirmed this. What institutions and funders need to mandate is that (1) immediately upon acceptance for publication, (2) the author’s final draft must be (3) deposited into the Institutional Repository. Only the depositing needs to be mandated; set-ting access privileges to the full-text as either OA or Restricted Access (RA) can be left up to the author. For articles published in the 93% of journals that have already endorsed self-archiving, access can be set as OA immediately; for the remaining 7%, authors can email the eprint in re-sponse to individual email requests automatically forwarded by the Repository
The effect of color on decision-making in a legal setting
No full textTwo hundred and fifty undergraduate students were presented a legal case\ud
perspective regarding a class action lawsuit describing the defendant positively or\ud
negatively and were accompanied by one of five stacked-bar graphs, or no graphic at all.\ud
The graphics were designed to manipulate visual features of the graph, including salience\ud
and hue. We presented learners with either an achromatic graphic, chromatic red graphic\ud
or chromatic green graphic representing the success or failure of the company. We\ud
measured learner evaluations of the company???s positive and negative characteristics, and\ud
doubt about the company???s guilt. Results indicated that there was no difference on\ud
evaluations and judgments when an achromatic graph was presented, but that both\ud
salience and hue influenced evaluations???specifically, that red lead to negative\ud
evaluations, except for when it is accompanied by a positive case perspective.CSU, Chic
Smoke and Mirrors - Illustrations by Neil Gaiman´s Book
No full textThe intention of this thesis is to create a collection of illustrations to fantasy stories Smoke and Mirrors: Short Fictions and Illusions by Neil Gaiman. File also includes book cover and flyleaf. The theoretical part focuses on the current trends in book design. First chapter explains concept, importance and historical context of illustration; the next chapter describes present illustration´s technologies. Next part focuses on Neil Gaiman, the author of the book, and his leading illustrator Dave McKean. Last chapter of the theoretical part compares covers and illustrations of foreign copies of book Smoke and Mirrors. The practical part includes detailed notes about working procedure and technologies used. Finally an interpretation to the individual illustrations is given
Dissimilarity is used as evidence of category membership in multidimensional perceptual categorization: a test of the similarity-dissimilarity generalized context model
No full textIn exemplar models of categorization, the similarity between an exemplar and category members constitutes evidence that the exemplar belongs to the category. We test the possibility that the dissimilarity to members of competing categories also contributes to this evidence. Data were collected from two 2-dimensional perceptual categorization experiments, one with lines varying in orientation and length and the other with coloured patches varying in saturation and brightness. Model fits of the similarity-dissimilarity generalized context model were used to compare a model where only similarity was used with a model where both similarity and dissimilarity were used. For the majority of participants the similarity-dissimilarity model provided both a significantly better fit and better generalization, suggesting that people do also use dissimilarity as evidence
A production and production book of Neil Simon's God's Favorite.
No full textThis thesis is the author's approach to directing and designing Neil Simon's God's Favorite for production on the stage of the Jones Theatre at Baylor University. It contains a biography of the playwright, including parallel elements in his works from life, and several critical reviews. This thesis analyzes the structural elements of the play: idea, dramatic action, character, dialogue, mood, tempo, and given circumstances. It also includes a discussion of the detailed design approach. All elements of the play's design are explored: setting, properties, lighting, costumes, sound, and make-up. In addition, the thesis discusses the casting, rehearsals, and performances. Illustrations and charts included are: a ground plan, properties list, light plot, lighting instrument schedule, costume plot, sound cue schedule, make-up chart, scenery, lighting and costume photographs. The final chapter is the prompt book. Found in the appendix is the pre-production publicity and a copy of the program
The Total Synthesis of Dragmacidins D and F
No full textThe dragmacidins are an emerging class of bis(indole) natural products isolated from deep-water marine organisms. Although there has been a substantial effort to prepare the simple piperazine dragmacidins, little synthetic work has been done in the area of the pyrazinone-containing family members, dragmacidins D, E, and F. These compounds are particularly interesting due to their complex structures and broad range of biological activity.
A highly convergent strategy to access dragmacidin D has been developed. In this approach, sequential halogen-selective Suzuki couplings were used to assemble the carbon scaffold of the natural product. After executing a highly optimized sequence of final events, the first completed total synthesis of dragmacidin D was achieved.
An enantiodivergent strategy for the total chemical synthesis of both (+)- and (-)-dragmacidin F from a single enantiomer of quinic acid has been developed and successfully implemented. Although unique, the synthetic routes to these antipodes share a number of key features, including novel reductive isomerization reactions, Pd(II)-mediated oxidative carbocyclization reactions, halogen-selective Suzuki couplings, and high-yielding late-stage Neber rearrangements.
The formal total syntheses of dragmacidin B, trans-dragmacidin C, and dihydrohamacanthin A are described. In addition, preliminary studies involving a novel approach for the preparation of dragmacidin E are reported.</p
Processing of polyphenolic composites with supercritical fluid anti-solvent technology
No full text© 2017 Author(s). Polyphenols have been developed, primarily exploiting their robust antioxidant properties, for medical and food applications. In spite of their advantages, polyphenolic compounds have drawbacks from their natural characteristics of being poorly soluble in aqueous solutions, thermo-labile and low oral bioavailaibility. In this article, strategy of processing with supercritical fluid (SCF) anti-solvent to improve the shortcomings is overviewed. Information obtained from the existing studies commonly confirms SCF technology applicability to produce composites of polyphenols with various morphology, size distributions and crystallinity. The application of SCF technology also enables to develop polyphenolic composites for alternative drug delivery such as in the pulmonary administrations
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