803 research outputs found
Die Dynamik des Zellskeletts. Wie molekulare "Speckles" die Bausteine der Zelle sichtbar machen
Perancangan Data Mart Pada PT Ebdesk Teknologi (Studi kasus : Pihak Chief Technology Officer)
Saat ini informasi berita melalui media sosial pada facebook dan twitter semakin berkembang
maka dari itu diperlukan pengembangan aplikasi Media Management oleh pihak Chief Technology
Officer yang bertujuan untuk memenuhi permintaan client dan meningkatkan kualitas informasi. Data
media sosial facebook dan twitter di Media Management belum dimanfaatkan secara maksimal untuk
keperluan analisis yang dilakukan oleh pihak Chief Technology Officer. Data media sosial tersebut
dirancang untuk menghindari data redundancy serta laporan yang dihasilkan bersifat operasional
sehingga membutuhkan resource dan waktu untuk menganalisis data. Karena itu dibutuhkan
perancangan terhadap data media sosial, agar data tersebut mempunyai bentuk yang menggambarkan
entitas data media sosial dari berbagai sudut pandang yang mudah dianalisis. Solusi yang dapat
mendukung terbentuknya sebuah informasi multidimensi yang terstruktur yaitu dengan menyediakan
sebuah basis data yang dapat dipresentasikan dalam berbagai bentuk yang konsisten dan basis data yang
memiliki hal tersebut adalah data mart.
Data mart merupakan bagian dari data warehouse yang dirancang khusus untuk menganalisis
data berdasarkan subjek-subjek, mendukung kebutuhan query, dan pengambilan keputusan pihak
manajemen. Pembangunan data mart menggunakan metode Ralph Kimball, pembentukan data dengan
proses ETL(Extract Transform Loading) menggunakan SSIS (SQL Server Integrated Service), untuk
proses analisis menggunakan OLAP (On-Line Analytical Processing) dengan tools DevExpress pada
Microsoft Visual Studio 2012 dan data mart dipresentasikan berbasis desktop yang berjalan pada
platform windows.
Dengan dibangunnya data mart dapat mempermudah pihak Chief Technology Officer dalam
mendukung proses analisis dan pengambilan keputusan dalam pengembangan aplikasi Media
Management yang dapat memaksimalkan pelayanan kepada client dalam mendapatkan informasi berita
secara detail
Measurement of the hyperfine structure of the S1/2-D5/2 transition in 43Ca+
The hyperfine structure of the S1/2-D5/2 quadrupole transition at 729 nm in
43Ca+ has been investigated by laser spectroscopy using a single trapped 43Ca+
ion. We determine the hyperfine structure constants of the metastable level as
A=-3.8931(2) MHz and B=-4.241(4) MHz. The isotope shift of the transition with
respect to 40Ca+ was measured to be 4134.713(5) MHz. We demonstrate the
existence of transitions that become independent of the first-order Zeeman
shift at non-zero low magnetic fields. These transitions might be better suited
for building a frequency standard than the well-known 'clock transitions'
between m=0 levels at zero magnetic field.Comment: corrected for sign errors in the hyperfine constants. No corrections
to were made to the data analysi
Ultrastable Optical Clock with Neutral Atoms in an Engineered Light Shift Trap
An ultrastable optical clock based on neutral atoms trapped in an optical
lattice is proposed. Complete control over the light shift is achieved by
employing the transition of
atoms as a "clock transition". Calculations of ac multipole polarizabilities
and dipole hyperpolarizabilities for the clock transition indicate that the
contribution of the higher-order light shifts can be reduced to less than 1
mHz, allowing for a projected accuracy of better than .Comment: 4 pages, 2 figures, accepted for publication in Phys. Rev. Let
Measure of phonon-number moments and motional quadratures through infinitesimal-time probing of trapped ions
A method for gaining information about the phonon-number moments and the
generalized nonlinear and linear quadratures in the motion of trapped ions (in
particular, position and momentum) is proposed, valid inside and outside the
Lamb-Dicke regime. It is based on the measurement of first time derivatives of
electronic populations, evaluated at the motion-probe interaction time t=0. In
contrast to other state-reconstruction proposals, based on measuring Rabi
oscillations or dispersive interactions, the present scheme can be performed
resonantly at infinitesimal short motion-probe interaction times, remaining
thus insensitive to decoherence processes.Comment: 10 pages. Accepted in JPhys
Electron impact ionization loading of a surface electrode ion trap
We demonstrate a method for loading surface electrode ion traps by electron
impact ionization. The method relies on the property of surface electrode
geometries that the trap depth can be increased at the cost of more
micromotion. By introducing a buffer gas, we can counteract the rf heating
assocated with the micromotion and benefit from the larger trap depth. After an
initial loading of the trap, standard compensation techniques can be used to
cancel the stray fields resulting from charged dielectric and allow for the
loading of the trap at ultra-high vacuum.Comment: 4 pages, 5 eps figures. Shift in focus, minor correction
Sub-dekahertz ultraviolet spectroscopy of 199Hg+
Using a laser that is frequency-locked to a Fabry-Perot etalon of high
finesse and stability, we probe the 5d10 6s 2S_1/2 (F=0) - 5d9 6s 2D_5/2 (F=2)
Delta-m_F = 0 electric-quadrupole transition of a single laser-cooled 199Hg+
ion stored in a cryogenic radio-frequency ion trap. We observe
Fourier-transform limited linewidths as narrow as 6.7 Hz at 282 nm (1.06 X
10^15 Hz), yielding a line Q = 1.6 X 10^14. We perform a preliminary
measurement of the 5d9 6s2 2D_5/2 electric-quadrupole shift due to interaction
with the static fields of the trap, and discuss the implications for future
trapped-ion optical frequency standards.Comment: 4 pages, 4 figures, submitted for publicatio
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