نتایج جستجو برای: or greater than
تعداد نتایج: 4655709 فیلتر نتایج به سال:
Heavy sea states and severe weather conditions have caused the loss of more than 200 super carriers within the last 20 years. In many cases single 'rogue waves' of abnormal height as well as groups of extreme waves have been reported by crew members of such vessels. The European Project MAXWAVE deals with both theoretical aspects of extreme waves as well as new techniques to observe these waves...
Absolute phase control of intense few-cycle pulses and steering the atomic-scale motion of electrons
In the past few years, ultrafast laser technology has developed to such a degree that the phase of a pulse under its envelope is now a meaningful measurable quantity. Many experiments now require the use of pulses with a fixed phase. The reliable production of such pulses, over extended periods of time, is of key importance to many areas of science. The central theme of this thesis is the gener...
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters.
Gold nanoparticles (AuNPs) have been deposited on n-type Ge photodetectors to improve the responsivity. Two different coverage ratios, including 10.5 and 30.3% of AuNPs have been prepared, and the fabricated photodetectors are compared with the control sample. The 1,310-nm responsivities at -2 V of the control, 10.5% AuNPs, and 30.3% AuNPs samples are 465, 556, and 623 mA/W, respectively. The A...
Electron momentum spectroscopy (an (e, 2e) experiment in the high-energy and large momentum transfer limit) is a scattering approach to the study of the electronic structure. The intensity observed in these experiment is, for an infinitely thin film, simply proportional to the spectral momentum density. For experiments using free-standing films of a more realistic thickness (100 Å or so), elast...
More than one third of the world’s irrigated areas suffer occasional or more frequent waterlogging (Donmann and Houston, 1967). Waterlogging has been shown to limit wheat yields in many regions of the world; an area estimated at 10 million ha is waterlogged each year in developing countries (Sayre et al., 1994). Waterlogging occurs when rainfall or irrigation water collects on the soil surface ...
Local strain and Ge content distribution in self-assembled, in-plane Ge/Si nanowires grown by combining molecular beam epitaxy and the metal-catalyst assisted-growth method were investigated by tip-enhanced Raman scattering. We show that this technique is essential to study variations of physical properties of single wires at the nanoscale, a task which cannot be achieved with conventional micr...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید