86,715 research outputs found
Разработка системы измерения производительности реализаций blockchain
No full textДолголев Филипп Петрович Разработка системы измерения производительности реализаций blockchain Старший преподаватель кафедры системного программирования Кириленко Яков Александрович При разработке приложений на основе технологии blockchain, из-за наличия множества различных реализаций, разработчики сталкиваются с проблемой выбора. Один из важных критериев при выборе - производительность. В процессе поиска системы, позволяющей измерить производительность различных реализаций blockchain, не обнаружены ни проприетарные системы, ни с открытым исходным кодом. В рамках этой работы рассматривается разработка модульной системы, решающей эту проблему. Использованных источников: 18 Долголев, Ф. П. Разработка системы измерения производительности реализаций blockchain: выпускная квалификационная работа: защищена 01.06.2017 / Долголев Филипп Петрович. – СПб., 2017. – 21 с. – Библиография: с. 20–21.Filipp Dolgolev Blockchain Implementations Benchmarking Tool senior lecturer, dept. of software engineering Iakov Kirilenko Mathematics & mechanics, software engineering department Since there are many different types of blockchain technologies, developers are faced with a dilemma of which technology to choose when developing applications for a particular use case. One of the most important criteria effecting the selection is performance. During our research, we were unable to source either proprietary, or open source solutions allowing to benchmark various blockchain technologies performances. In this context, we are considering the development of such a solution. Sources cited: 18 Dolgolev, F. Blockchain Implementations Benchmarking Tool: Graduation thesis: Defended 01.06.2017 / Filipp Dolgolev. – St. Petersburg., 2017. – 21 pp. – Bibliography: pp. 20–21
Filipp Maliavin in Emigration: Artistic Strategy and the Afterlife of Secessionism
No full text© Association for Art History 2019. This essay addresses artistic strategy in interwar Europe through the career of Russian émigré artist Filipp Maliavin. Maliavin's eclectic style, which adopted modern techniques but still strove for legibility, was characteristic of the international juste milieu artists participating in the secessionist system of the late nineteenth and early twentieth centuries. Scholars have emphasized this system's demise in 1914, yet Maliavin's success demonstrates how secessionist exhibitions and transnational networks continued to benefit artists. Exploring Maliavin's dominance of the Parisian salons, and his ability to market his work across Europe amid worldwide economic crisis in the 1930s, dispels previous assumptions about how artists operated during this period. In addition, this account illuminates the rich possibilities that unfold when investigating artists residing in the middle ground between tradition and avant-garde, challenging narratives that dismiss continuity in artists' careers as regressive
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
[Newspaper Clipping: Author Claims Evidence of Second JFK Assassin #1]
No full textNewspaper article titled "Author Claims Evidence of Second JFK Assassin." The article states that author Richard J. Whalen concluded "that there is circumstantial evidence to support the theory of a second assassin in the shooting of President John F. Kennedy.
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Expanding the Electronic Structure Toolkit for f-Element Chemistry: Advances, Best Practices, and Examples
No full textIn recent years, collaborative studies that leverage experimental synthesis, spectroscopic characterization, and electronic structure analysis have enabled significant advances in f-element chemistry through the discovery of newly accessible metal oxidation states and novel electronic configurations for lanthanide (Ln) and actinide (An)-containing species. With the purpose of extending the utility of computational approaches to maintain this positive trajectory, the present thesis discusses recent developments and applications of computational chemistry methods, with a focus on density functional theory (DFT), towards the accurate prediction and characterization of new f-element complexes. A DFT methodology based on (meta)-generalized gradient approximation (mGGA) density functionals, triple-ζ quality basis sets for metal atoms, and effective core potentials (ECPs) is shown to provide the electronic structure insights necessary to understand the unexpected stability of fully linear Dy and Tb-based metallocene species, Dy(CpiPr5)2 and Tb(CpiPr5)2. Calculations reveal that such unorthodox molecular geometry, which is rarely observed for lanthanides, is facilitated by a 4fn 5d1 electronic configuration of the metal center, which gives rise to a σ−bonding interaction between the 5d/6s HOMO and cyclopentadienyl ligand system. Further calculations using this DFT methodology predict the existence of stable, linear An-based metallocenes, and the results of this study are used to guide synthetic efforts towards the experimental isolation of U(CpiPr5)2, the first An-based “ferrocene” analog. A similar computational methodology which replaces the ECP with an all-electron approach is applied towards the characterization of Ln-based spin molecular qubits, [Lu(OAr*)3]−, [La(OAr*)3]−, and [Lu(NR2)3]−, revealing the importance of 6s orbital contributions to the spin density to facilitate large Fermi-contact and thus hyperfine interactions. This thesis concludes by describing the prediction of accurate EPR parameters, such as the hyperfine coupling constant, electronic g-tensor, and quadrupole coupling constant in relativistic DFT for the broader study of candidate molecular qubits. An implementation of these quantities is presented within the relativistic exact two-component theory (X2C) method, and benchmark calculations on transition metal and f-element complexes are provided to evaluate choice of the relativistic Hamiltonian, basis set, and density functional approximation (DFA). A recommended set of parameters based on the results of these benchmarks is presented, and subsequently used to calculate the EPR parameters for the previous series of Lu and La molecular qubit systems. These predictions are found to reduce errors by roughly one order of magnitude when compared with the unrefined methodology, and are highly accurate when compared to experimental data - representing an advance for in-silico characterization of EPR spectra. Present challenges and future directions for the development of electronic structure methods for the study of the f-elements are assessed
Also By The Same Author: AKTiveAuthor, a Citation Graph Approach to Name Disambiguation
No full textThe desire for definitive data and the semantic web drive for inference over heterogeneous data sources requires co-reference resolution to be performed on those data. In particular, name disambiguation is required to allow accurate publication lists, citation counts and impact measures to be determined. This paper describes a graph-based approach to author disambiguation on large-scale citation networks. Using self-citation, co-authorship and document source analyses, AKTiveAuthor clusters papers, achieving precision of 0.997 and recall of 0.818 over a test group of eight surname clusters
John F. Kennedy telegram to Roosevelt
No full textJersey Homesteads (later the Borough of Roosevelt) was established in the 1930s as an agro-industrial cooperative community. It was established specifically for urban Jewish garment workers, many of whom had emigrated from Europe. President John F. Kennedy sent a telegram to the citizens of Roosevelt, New Jersey, apologizing for not being able to attend the memorial dedication in honor of former President Franklin Delano Roosevelt. (Jersey Homesteads became Roosevelt in 1945 in honor of the president.) President Kennedy expressed his gratitude to the people of Roosevelt for constructing the memorial, and commented that it will serve as a constant reminder of Roosevelt's good works
Logarithmic variance profiles and the corresponding f-1 spectra of temperature fluctuations in turbulent Rayleigh-Bénard convection
No full textWe report experimental results for the temperature variance 2(z) and the corresponding frequency spectra P(f) in turbulent Rayleigh-Bénard convection (RBC) in a cylindrical sample of aspect ratioT= D/L = 1:00 (D = 1:12 m is the diameter and L = 1:12 m the height). The measurements were conducted in the Rayleigh-number range 1011 < Ra < 1:35 1014 and Pr ' 0:8. For Ra = 1:35x1014, 2(z) could be described well by a logarithmic dependence on the vertical position z in a range of z 1 < z < z 2 with z 1 ' 70 and z 2 = 0:1L. Here L=(2Nu) is the thickness of a thin thermal sublayer adjacent to the horizontal plate where the heat flux (denoted by the Nusselt number Nu) is carried mostly by thermal diffusion. In the log layer, we found that the temperature spectra had a significant frequency range over which P(f) f with close to 1. As Ra decreased, increased so that the log layer became thinner. At Ra = 2:05 1011, z 2 < z 1 and therefore there was no range for a log layer. Correspondingly, the temperature spectrum near the horizontal plate did not have the f1 scaling form either
Maine author Franklin F. Gould recalls his first glimpse of the outside world
No full textMaine author Franklin F. Gould recalls his first glimpse of the outside world as he relates how, as a young farm boy in the late 1800\u27s, he drove his father\u27s horses on an errand to an icebound river
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