نتایج جستجو برای: femto
تعداد نتایج: 700 فیلتر نتایج به سال:
Axel Ruehl,1,* Michael J. Martin,2 Kevin C. Cossel,2 Lisheng Chen,2 Hugh McKay,1 Brian Thomas,1 Craig Benko,2 Liang Dong,1,† John M. Dudley,3 Martin E. Fermann,1 Ingmar Hartl,1 and Jun Ye2 1IMRA America Inc., 1044 Woodridge Avenue, Ann Arbor, Michigan 48105, USA 2JILA, National Institute of Standards and Technology and University of Colorado, Department of Physics, 440 UCB, Boulder, Colorado 80...
This is a survey paper on the recently developed and rapidly evolving field of femtocells. Quite often, it is noticed that cell-phone signals are strongly attenuated, when indoors, leading to call dropping or poor call quality. Femtocells are mini base stations that are deployed in users’ homes so that the user can directly connect to the cellular network through the femtocell instead of the ou...
In hierarchical network where a macro cell includes multiple small scale cells such as micro, femto cells and Wi-Fi hot-spots, preventing unnecessary handover is one of the most important matters due to so many inter-tier handovers. From the observation that there are many temporary visitors who stay in a small scale cell with short residence time, some recent handover schemes propose to delay ...
Michel Planat, Peter Levay and Metod Saniga 1 Institut FEMTO-ST, CNRS, 32 Avenue de l’Observatoire, F-25044 Besançon, France. 2 Departement of Theoretical Physics, Institute of Physics, Budapest University of Technology and Economics, H-1521 Budapest, Hungary 3 Astronomical Institute, Slovak Academy of Sciences, SK-05960 Tatranskà Lomnica, Slovak Republic. 4 Center for Interdisciplinary Researc...
We report a two-photon fluorescent probe (AHg1) that can be excited by 780 nm femto-second pulses, shows high photostability and negligible toxicity, and can visualize the site of Hg(2+) accumulation, but can also estimate trace amounts of mercury ions in fresh fish organs by two-photon microscopy.
Jury Yong CHEN, Directeur de Recherches, ENS Paris Rapporteur Christophe GORECKI , Directeur de Recherches, FEMTO-ST Besançon Rapporteur Yamin LEPRINCE, Professeur, UPEMLV, Marne-la-Vallée Examinateur Bassam SAADANY, Chef du département MEMS, Si-Ware-Systems Examinateur Tarik BOUROUINA, Professeur, ESIEE Paris Examinateur Ai-Qun LIU, Professeur, Nanyang Technological University, Singapour Exami...
Sub-picosecond optical pulses have been successfully generated using a novel monolithic passive colliding pulse mode-locked (CPM)l semiconductor multiple quantum-well (MQW) laser. Transform-limited pulse width of 830 femto-seconds is achieved at a wavelength of 1.5pm and a repetition rate of 80 GHz. The measured timebandwidth product is 0.31. A record high repetition rate of 350 GHz is also dem...
We report the first results of the LISA Pathfinder in-flight experiment. The results demonstrate that two free-falling reference test masses, such as those needed for a space-based gravitational wave observatory like LISA, can be put in free fall with a relative acceleration noise with a square root of the power spectral density of 5.2±0.1 fm s^{-2}/sqrt[Hz], or (0.54±0.01)×10^{-15} g/sqrt[Hz...
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