1,536 research outputs found
One-dimensional sets and planar sets are aspherical
No full textAbstractWe give a relatively short proof of the theorem that planar sets are aspherical. The first proof of this theorem, by third author Andreas Zastrow, was considerably longer
Music of Hugo Weisgall
No full textRecorded during a live performance at Oakland Recital Hall, Western Michigan University, Kalamazoo, Michigan on October 21, 1981, 8:00 p.m., program no. 34 of the School of Music's 1981-1982 season.1st work: Marilyn Rose Nicholson, soprano ; Robert Byrens, piano. 2nd work: Joyce Zastrow, soprano ; Robert Byrens, piano. 3rd work: Elizabeth Patches, mezzo-soprano ; Phyllis Rappeport, piano. 4th work: Gail Smith, stepdaughter ; Corinne O'Heran, mother ; Rick Knapp, son ; Mark Cummings, father ; Rick Krzeczkowski, the director ; Monica Whitaker, the prompter ; Nadine Vorenkamp, the coloratura ; Mary Rempalski, the mezzo ; Matthew Elliott, the basso cantante ; Tom Manguem, the tenore buffo ; Sarah Coley, the wardrobe mistress ; Jennifer Little, the understudy.Reel 1: Introductory remarks by the composer -- Two madrigals. Nuptual song ; No more I will thy love importune -- Translations. Song ; Poem ; The rebelReel 2: Di goldene pave. Di Goldene Pave ; Undzer Rebenyu ; Der Rebe Elimeylekh ; Mayn Harts Veynt in Mir ; Baleboste Zisinke ; Shlof Mayn Kind, Sholf Keyseyder ; Lomir Zikh Bafrayen -- Six characters in search of an author. Act I / libretto by Dennis Johnston, based on the play by Luigi Pirandell
Removal of AMPA receptors (AMPARs) from synapses is preceded by transient endocytosis of extrasynaptic AMPARs
No full text
Seeking critical nodes in digraphs
No full textThe Critical Node Detection Problem (CNDP) consists in finding the set of nodes, defined critical, whose removal maximally degrades the graph. In this work we focus on finding the set of critical nodes whose removal minimizes the pairwise connectivity of a direct graph (digraph). Such problem has been proved to be NP-hard, thus we need efficient heuristics to detect critical nodes in real-world applications. We aim at understanding which is the best heuristic we can apply to identify critical nodes in practice, i.e., taking into account time constrains and real-world networks. We present an in-depth analysis of several heuristics we ran on both real-world and on synthetic graphs. We define and evaluate two different strategies for each heuristic: standard and iterative. Our main findings show that an algorithm recently proposed to solve the CNDP and that can be used as heuristic for the general case provides the best results in real-world graphs, and it is also the fastest. However, there are few exceptions that are thoroughly analyzed and discussed. We show that among the heuristics we analyzed, few of them cannot be applied to very large graphs, when the iterative strategy is used, due to their time complexity. Finally, we suggest possible directions to further improve the heuristic providing the best results
Protein Design: Toward Functional Metalloenzymes
No full textThe scope of this Review is to discuss the construction of metal sites in designed protein scaffolds. We categorize the effort of designing proteins into redesign, which is to rationally engineer desired functionality into an existing protein scaffold,(1-9) and de novo design, which is to build a peptidic or protein system that is not directly related to any sequence found in nature yet folds into a predicted structure and/or carries out desired reactions.(10-12) We will analyze and interpret the significance of designed protein systems from a coordination chemistry and biochemistry perspective, with an emphasis on those containing constructed metal sites as mimics for metalloenzymes
Avaliação das alterações da saturação periférica de oxigênio, da tensão arterial e do pulso em pacientes submetidos à sedação consciente para endoscopia digestiva alta
No full textTrabalho de Conclusão de Curso - Universidade Federal de Santa Catarina. Curso de Medicina. Dapartamento de Clínica Cirúrgica
Solar collector with downward-facing absorber for suppression of convection losses - process heat in the temperature range 100 - 200 degrees C
No full textS.505-509 : Abb.,Lit
Role of oxygen and nitrogen in n-type microcrystalline silicon carbide grown by hot wire chemical vapor deposition
No full textN-type microcrystalline silicon carbide (μc-SiC:H(n)) deposited by hot wire chemical vapor deposition provides advantageous opto-electronic properties for window layer material in silicon-based thin-film solar cells and silicon heterojunction solar cells. So far, it is known that the dark conductivity (σd) increases with the increase in the crystallinity of μc-SiC:H(n)films. However, due to the fact that no active doping source is used, the mechanism of electrical transport in these films is still under debate. It is suggested that unintentional doping by atmospheric oxygen (O) or nitrogen (N) contamination plays an important role in the electrical transport. To investigate the impact of O and N, we incorporated O and N in μc-SiC:H(n) films and compared the influence on the microstructural, electronic, and optical properties. We discovered that, in addition to increasing the crystallinity, it is also possible to increase the σd by several orders of magnitude by increasing the O-concentration or the N-concentration in the films. Combining a high concentration of O and N, along with a high crystallinity in the film, we optimized the σd to a maximum of 5 S/cm
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