231,969 research outputs found
Automorphisms and coverings of Klein surfaces
No full textIn this thesis the theory of automorphisms and coverings of compact Klein surfaces is discussed by considering a Klein surface as the orbit space of a non-Euclidean crystallographic group. In chapter 1 we set out some of the well-established theory concerning these ideas. In chapter 2 maximal automorphism groups of compact Klein surfaces without boundary are considered. We solve the problem of which groups PSL (2,q) act as maximal automorphism groups of non-orientable Klein surface without boundary. In chapter 3 we discuss cyclic groups acting as automorphism groups of compact Klein surfaces without boundary. It is shown that the maximum order for a cyclic group to be an automorphism group of a compact non-orientable Klein surface without boundary of genus g ?3 is 2g, if g is odd and 2 (g – 1) if g is even. Chapter 4 is the largest section of the thesis. It is concerned with coverings (possibly folded and ramified) of compact Klein surfaces, mainly Klein surfaces with boundary. All possible two-sheeted connected unramified covering surfaces of a Klein surface are classified and the orientability of a normal n-sheeted cover, for odd n, is determine
Electrochromic structures and methods, U.S. Patent 5,404,244
No full textThe invention provides for the simplified production of chromogenic devices, including relatively large scale devices in panel form. One or more of the layers of the invention are formed from heated, hydrolyzed gel reaction product of one or more dissolved organo-inorganics, such as alkoxides, which may be metallic. The invention includes an ion-conducting layer which comprises a lithium based ceramic material containing residual organic impurities
Sol-gel fabrication of thin-film electrolyte in an oxygen generator, U.S. Patent 7,790,221
No full textAn electrochemical cell that receives an inlet stream of air and produces an outlet stream of a high oxygen concentration of gas. The cell is made up of a plurality of layers and preferably a porous electrolyte comprised of yttria stabilized zirconia (YSZ) that allows only oxygen ions to pass therethrough and which is covered on its sides with electrodes comprised of lanthanum strontium manganate (LSM) which in turn are coated with a layer of platinum to aid in the even distribution of the electrical current. An electrical current is passed through the electrodes to produce a voltage difference therebetween. The layers of YSZ and LSM are formed by a sol-gel process
Interview with Gertrude Klein
No full textAn interview with Gertrude Louise Saxton Klein regarding her experiences in a one-room school house.https://scholars.fhsu.edu/ors/1210/thumbnail.jp
Nanostructured re-doped SiO<sub>2</sub>-base fluorescent materials and methods for production of same, U.S. Patent 7,407,604
No full textA new class of nanostructured RE-doped SiO2-base materials that display superior fluorescence properties is provided. In particular, high gain combined with a broad and flat spectral band width is observed in material composed of a high fraction of a nano-dispersed metastable silicate phase in a glassy SiO2 matrix, produced by partial devitrification (crystallization) of several glassy Al2O3/Er2O3- and Y2O3/Er2O3-doped SiO2 compositions. Also, a highly deconvoluted spectral emission, with several prominent peaks, is observed in completely devitrified material, consisting of a uniform nano-dispersion of an equilibrium silicate phase in a crystobalite SiO2 matrix. Such enhanced fluorescence properties were observed in heat treated nanopowders prepared by vapor-phase, solgel, rapid solidification, and spray-pyrolysis method
Caulobacter crescentus adapts to phosphate starvation by synthesizing anionic glycoglycerolipids and a novel glycosphingolipid
No full textCaulobacter crescentus adapts to phosphate starvation by elongating its cell body and a polar stalk structure. The stalk is an extension of the Gram-negative envelope containing inner and outer membranes as well as a peptidoglycan cell wall. Cellular elongation requires a 6- to 7-fold increase in membrane synthesis, yet phosphate limitation would preclude the incorporation of additional phospholipids. In the place of phospholipids, C. crescentus can synthesize several glycolipid species, including a novel glycosphingolipid (GSL-2). While glycosphingolipids are ubiquitous in eukaryotes, the presence of GSL-2 in C. crescentus is surprising since GSLs had previously been found only in Sphingomonas species, in which they play a role in outer membrane integrity. In this paper, we identify three proteins required for GSL-2 synthesis: CcbF catalyzes the first step in ceramide synthesis, while Sgt1 and Sgt2 sequentially glycosylate ceramides to produce GSL-2. Unlike in Sphingomonas, GSLs are nonessential in C. crescentus; however, the presence of ceramides does contribute to phage resistance and susceptibility to the cationic antimicrobial peptide polymyxin B. The identification of a novel lipid species specifically produced upon phosphate starvation suggests that bacteria may be able to synthesize a wider variety of lipids in response to stresses than previously observed. Uncovering these lipids and their functional relevance will provide greater insight into microbial physiology and environmental adaptation.Peer reviewe
The role of imagination in Bergman, Klein and Sartre
No full textThis thesis was submitted for the degree of Doctor of Philosophy and was awarded by Brunel UniversityThis thesis provides an inter-disciplinary study of selected works by Ingmar Bergman. I explore how key concepts from Melanie Klein and Jean-Paul Sartre apply to the focus on characters in a state of heightened imagination; and the value placed on imagination in the construction of these films. This involves recognition of the way an active response from the viewer is encouraged.
Klein, Sartre and Bergman also attend to contextual factors that challenge any notion of subjectivity as sovereign and the power of imagination is frequently placed in a social context. All three figures develop their ideas within specialised fields drawing on the influence of others. Chapter 2 shows how Klein’s ideas relate to the influence of Freud before exploring how her work can be applied to Bergman’s films through the example of Wild Strawberries. Chapter 3 concentrates on Sartre’s early work, The Imaginary and considers how this is significant in relation to some of Sartre’s better-known philosophical ideas developed during and after the Second World War. These ideas will lead to an exploration of The Seventh Seal.
Chapters 4, 5, and 6 focus on three films from distinct parts of Bergman’s career: Summer with Monika, The Virgin Spring and Hour of the Wolf. In Chapter 4 this will be preceded by a brief over-view of three more films from the early part of Bergman’s career. These chapters explore how Kleinian and Sartrean ideas can be incorporated in close analysis, and alongside selected critical responses to the films. The analysis integrates key points from Klein and Sartre in a methodology specific to film studies. This will include analysis of cinematic elements such as camera work and lighting, and recognition of narrative structure and character developmen
Letter, 1938 Jan. 28, to Miss Julia D. Klein, Los Angeles, Calif.
No full textLetter from [Edward Elliott] to Julia Klein recommending she forward her poem on to Amelia Earhart's husband, George Putnam, January 28, 193
T.E.D. Klein: "Certain Things Associated With Night"
No full textThis record consists of a transcript of an interview with T.E.D. Klein
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