123,583 research outputs found
Karakteristik Spread F di Atas Sumedang
No full textKarakteristik spread F di atas Sumedang diteliti menggunakan data hasil pengamatan dengan ionosonda IPS-71 dari bulan Maret sampai dengan Agustus 1998. Hasil menunjukkan pada periode tersebut spread F terbanyak terjadi pada bulan Mei - Juni antara pukul 23.30 - 02.00, dengan persentase sebesar 60 %. Adanya pergerakan lapisan F ionosfer ke arah vertikal diamati dengan adanya variasi ,harga h'F pada malam hari. Diperoleh pula periode sekitar 5 jam untuk spread F yang terjadinya mulai sebelum tengah malam, sedangkan spread F yang terjadinya mulai sesudah tengah malam, periodenya adalah sekitar 2 jam Fenomena ini menunjukkan adanya perbedaan penyebab terjadinya spread F pada kedua kejadian di atas. Perbandingan frekuensi maksimum lapisan F (fxF2) pada saat terjadi dan tidak terjadi spread F memberikan hasil adanya penurunan sebesar 10 % - 20 % antara pukul 18:00-22:00 sedangkan setelah pukul 00.00 harga fxF2 penurunannya di bawah 6 %. Besarnya TEC (Total Electron Content) di Bandung pada saat terjadi spread F ruenunjukkan adanya penurunan sebesar 16,72 % pada awal malam hari dan semakin malam penurunarmya semakin berkurang. Penurunan harga TEC disebabkan oleh berkurangnya kerapatan elektron pada lapisan F karena pada saat terjadi spread F terjadi penyebaran lapisan F ke arah vertikal. Hal ini didukung dengan berkurangnya harga FxF2 pada saat terjadi spread F.Hlm.8-1
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.
Primer1: Primer design Web service for Tetra-Primer ARMS-PCR
No full textTetra-primer ARMS-PCR is used extensively as a low cost, single PCR assay requiring no post-PCR manipulation. The design of successful primers depends on a number of variables such as melting temperatures, GC content, complementarity and selection of mismatch bases. The optimal selection of primers can be achieved in an automated way using a program which evaluates candidate primers for a given sequence. The Primer1 software was developed originally for use in the context of restriction fragment length polymorphism analysis using gel electrophoresis. However, recent applications have been more diverse, reviewed here, and we present an overview of the Primer1 software for primer design and web-service. We have updated the Primer1 program, and provide more complete details of the implementation. We also provide test data and output. The program is now available on a new, efficient, LAMP web service for users at: http://primer1.soton.ac.uk/primer1.htm
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
Unsteady separated and reattaching turbulent flow over a two-dimensional square rib
No full textThe spatio-temporal characteristics of the separated and reattaching turbulent flow over a two-dimensional square rib were studied experimentally. Synchronized measurements of wall-pressure fluctuations and velocity fluctuations were made using a microphone array and a split-fiber film, respectively. Profiles of time-averaged streamwise velocity and wall-pressure fluctuations showed that the shear layer separated from the leading edge of the rib sweeps past the rib and directly reattaches on the bottom wall (x/H = 9.75) downstream of the rib. A thin region of reverse flow was formed above the rib. The shedding large-scale vortical structures (fH/U(0) = 0.03) and the flapping separation bubble (fH/U(0) = 0.0075) could be discerned in the wall-pressure spectra. A multi-resolution analysis based on the maximum overlap discrete wavelet transform (MODWT) was performed to extract the intermittent events associated with the shedding large-scale vortical structures and the flapping separation bubble. The convective dynamics of the large-scale vortical structures were analyzed in terms of the autocorrelation of the continuous wavelet-transformed wall pressure, cross-correlation of the wall-pressure fluctuations, and the cross-correlation between the wall pressure at the time-averaged reattachment point and the streamwise velocity field. The convection speeds of the large-scale vortical structures before and after the reattachment point were U(c) = 0.35U(0) and 0.45U(0), respectively. The flapping motion of the separation bubble was analyzed in terms of the conditionally averaged reverse-flow intermittency near the wall region. The instantaneous reattachment point in response to the flapping motion was obtained; these findings established that the reattachment zone was a 1.2H-long region centered at x/H = 9.75. The reverse-flow intermittency in one period of the flapping motion demonstrated that the thin reverse flow above the rib is influenced by the flapping motion of the separation bubble behind the rib. (c) 2007 Elsevier Ltd. All rights reserved
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