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Carbamate-directed benzylic lithiation for the diastereo- and enantioselective synthesis of diaryl ether atropisomers
Abigail Page,Jonathan Clayden
Beilstein Journal of Organic Chemistry , 2011, DOI: 10.3762/bjoc.7.156
Abstract: Diaryl ethers carrying carbamoyloxymethyl groups may be desymmetrised enantio- and diastereoselectively by the use of the sec-BuLi–( )-sparteine complex in diethyl ether. Enantioselective deprotonation of one of the two benzylic positions leads to atropisomeric products with ca. 80:20 e.r.; an electrophilic quench typically provides functionalised atropisomeric diastereoisomers in up to 97:3 d.r.
Online Courses and Online Teaching Strategies in Higher Education  [PDF]
Abigail Mitchell
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.523225
Abstract: Online faculty need to engage the student. Online course work is now an integral element of mainstream higher education. Online courses often lack face-to-face interaction, peer interaction, faculty feedback and the lack of community. Engagement of the learner is essential for learning and promoting student satisfaction. There are online teaching strategies that could enhance a student’s perception of engagement. This manuscript was completed by a literature review process.
Effect of Honey a Natural Sweetener with Several Medicinal Properties on the Attributes of a Frozen Dessert Containing the Probiotic Lactobacillus acidophilus  [PDF]
Abigail Greenbaum, Kayanush J. Aryana
Open Journal of Medical Microbiology (OJMM) , 2013, DOI: 10.4236/ojmm.2013.32015
Abstract: Lactobacillus acidophilus has several health advantages. Honey has several medicinal properties and is also a natural sweetener which could be used in frozen desserts. There are various types of honey based on color namely, light, amber and dark. Influence of honey on attributes of a probiotic frozen dessert is not known. The objective was to study the effect of light, amber colored and dark honey on the Lactobacillus acidophilus counts and quality attributes of probiotic ice cream. Ice creams were manufactured with use of Lactobacillus acidophilus at 50 g of frozen culture concentrate per 7.75 liters of ice cream mix and with the use of light or amber or dark honey individually. Control had no honey and was sweetened with sugar. Use of honey increased Lactobacillus acidophilus counts and viscosity, while decreased pH and melt down volume. Light honey ice cream had flavor and appearance scores comparable to the control vanilla ice cream. Light honey can be recommended for the manufacturing Lactobacillus acidophilus probiotic ice creams thus having a frozen dessert with the health advantageous medicinal properties of honey.
Memory and Memories: an exploratory mixed method case series study with brain injured adults and their families, using PhotoFrame Therapy and wireless digital photo frame technology
Abigail Harding
International Journal of Integrated Care , 2012,
"Wenn ich nicht nerv s bin, mach ich mir Sorgen – macht das Sinn?" Der Gebrauch von Emotionsbegriffen in Leistungsbeschreibungen von Athleten "If I'm Not Nervous, I'm Worried, Does That Make Sense?": The Use of Emotion Concepts by Athletes in Accounts of Performance "Si no estoy nervioso, estoy preocupado, tiene eso sentido?": el uso de los conceptos de emoción que hacen los atletas al relatar el rendimiento
Abigail Locke
Forum : Qualitative Social Research , 2003,
Abstract: Traditionell hat sich die Erforschung von Emotionen im Sport auf den Einfluss spezifischer Emotionen, im Besonderen der Angst, auf die Leistung konzentriert. Dieser Artikel behandelt Emotionen aus der Perspektive der Diskursiven Psychologie und nutzt hierbei die Methoden der Diskursanalyse und der Konversationsanalyse. Auf der Basis von Interviewdaten von Hochleistungssportlern untersucht dieser Artikel den Gebrauch von Emotionsbegriffen bei Beschreibungen athletischer Leistungen. Was diese Analyse zeigt, ist, dass obwohl Athleten behaupten, spezifische Emotionen wie Nervosit t seien bei sportlichen Leistungen normal, das Empfinden solcher Emotionen in der Vorbereitung zu einem Wettbewerb von ihnen nicht erw hnt wird, wenn sie ihre Beschreibungen von Versagen konstruieren. Im Unterschied zur traditionellen sportspsychologischen Forschung, die Emotionen, z.B. Angst, als quantifizierbar betrachtet, demonstriert dieser Artikel, dass Emotionsbegriffe eine vielf ltige Interaktionsbasis darstellen, die in unsere Diskurspraktiken eingebettet ist. URN: urn:nbn:de:0114-fqs0301105 Traditionally research into emotions in sport has focused on the impact of specific emotions upon performance, most notably anxiety. This paper approaches emotion from the perspective of discursive psychology, drawing on the methods of discourse analysis and conversation analysis. Using interview data from high level athletes, this paper examines the uses of emotion concepts in accounts of athletic performance. What becomes apparent through the analysis is that athletes claim that specific emotions such as nervousness are normal in sporting performance. In contrast, when accounting for failure, the athletes construct their build-up to the competition as containing no experience of these emotions. Rather than in traditional sports psychological research whereby emotions are seen to be quantifiable, this paper demonstrates how emotion terms form a rich interactional currency that are embedded within our accounting practices. URN: urn:nbn:de:0114-fqs0301105 Tradicionalmente la investigación sobre las emociones en el deporte se ha centrado en el impacto de las emociones específicas sobre la acción, principalmente en el caso de la ansiedad. Este artículo se aproxima a la emoción desde la perspectiva de la psicología discursiva, a través de los métodos de análisis de discurso y análisis de la conversación. Utilizando los datos de entrevistas a atletas de alto nivel, el artículo examina el uso de los conceptos de emoción en relatos del rendimiento atlético. Lo que parece evidente a través del
"The Man of these Infinite Possibilities": Max Ernst’s Cinematic Collages
Abigail Susik
Contemporaneity : Historical Presence in Visual Culture , 2011, DOI: 10.5195/contemp.2011.27
Abstract: On more than one occasion in his critical writings of the 1920’s, surrealist leader André Breton compared Max Ernst’s collages to cinema. In his first essay on the artist in 1921, Breton aligned Ernst’s collages with cinematic special effects such as slow and accelerated motion, and spoke of the illusionistic ‘transformation from within’ that characterized Ernst’s constructed scenes. For Breton, Ernst’s collages employing found commercial, scientific and journalistic images approximated the naturalistic movement of film, and thereby contributed to the radical obsolescence of traditional two-dimensional media such as painting and drawing, which remained frozen in stillness. Thus, Ernst’s images were provocative witnesses to the way in which modern technology fundamentally altered the perspectivally-ordered picture plane. But at the same time that Ernst’s collages rendered painting obsolete, they likewise depended upon fragments of outmoded popular culture themselves. For Breton, Ernst was a magician, “the man of these infinite possibilities,” comparable to cinematic prestidigators like turn-of-the-century filmmaker Georges Méliès. By drawing on the influence of recently outmoded popular culture such as early trick films, Ernst provides a crucial early example of the post-war fixation on counter-temporalities and anti-production. At once technologically advanced and culturally archeological, Ernst’s collages cannily defy strict categorization as “Modernist.”
Invariants of curves in RP^2 and R^2
Abigail Thompson
Mathematics , 2006, DOI: 10.2140/agt.2006.6.2175
Abstract: There is an elegant relation found by Fabricius-Bjerre [Math. Scand 40 (1977) 20--24] among the double tangent lines, crossings, inflections points, and cusps of a singular curve in the plane. We give a new generalization to singular curves in RP^2. We note that the quantities in the formula are naturally dual to each other in RP^2, and we give a new dual formula.
Finding geodesics in a triangulated 2-sphere
Abigail Thompson
Mathematics , 2014,
Abstract: Let S be a triangulated 2-sphere with fixed triangulation T. We apply the methods of thin position from knot theory to obtain a simple version of the three geodesics theorem for the 2-sphere [5]. In general these three geodesics may be unstable, corresponding, for example, to the three equators of an ellipsoid. Using a piece-wise linear approach, we show that we can usually find at least three stable geodesics.
Stakes and Motivation in Tournaments: Playing When There is Nothing to Play for but Pride
Lionel Page,Katie Page
Economic Analysis and Policy , 2009,
Abstract: Tournaments are an effective means of incentivising participants to ensure an optimal level of effort. However, situations can occur in tournaments where the final outcome of a given competitor does not depend on his/her future performance. Specifically, we study these specific situations in a data set of the group stages of European football club competitions from 1992 to 2009. We identify situations where teams are already sure to finish either first or last at the penultimate stage in the group. We show that such situations affect team performance in the last match, typically decreasing the performance of a team sure to finish first and increasing the performance of a team sure to finish last. The first finding is in line with the economic predictions yet provides interesting implications, namely that the schedule of the match order plays a significant role in the overall performance of the team. The second, counter-intuitive, finding is not well accommodated into the existing economics framework and thus we discuss two alternative explanations, one based on social pressure and the other on pride.
Inexpensive Geophysical Instruments Supporting Groundwater Exploration in Developing Nations  [PDF]
James A. Clark, Richard Page
Journal of Water Resource and Protection (JWARP) , 2011, DOI: 10.4236/jwarp.2011.310087
Abstract: Geophysical methods are often used to aid in exploration for safe and abundant groundwater. In particular resistivity and seismic refraction methods are helpful in determining depth to bedrock and zones of saturation in the subsurface. However the expense of these instruments ($5000 to $20,000) has resulted in their limited use in developing countries. This paper describes how to construct these devices for less than $250 each. The instruments are small, light and robust and are as useful for groundwater exploration as the commercial models for shallow aquifers (less than 35 m deep) where wells can be hand dug, augured or drilled with small portable drill rigs. Data interpretation can be accomplished quickly in the field with free software implemented on a laptop computer. A suite of geophysical instruments and software can therefore be assembled for less than $850. This paper gives the design for these instruments and essential information needed to use them. It is hoped that these inexpensive geophysical instruments can be widely distributed among drillers and aid workers in developing countries, improving the success rate of water wells.
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