Results 51 to 60 of about 536,235 (301)

4D Scanning Ultrafast Electron Microscopy: Visualization of Materials Surface Dynamics [PDF]

open access: yes, 2011
The continuous electron beam of conventional scanning electron microscopes (SEM) limits the temporal resolution required for the study of ultrafast dynamics of materials surfaces. Here, we report the development of scanning ultrafast electron microscopy (
Mohammed, Omar F.   +3 more
core   +1 more source

dUTPase is essential in zebrafish development and possesses several single‐nucleotide variants with pronounced structural and functional consequences

open access: yesFEBS Open Bio, EarlyView.
dUTPases are involved in balancing the appropriate nucleotide pools. We showed that dUTPase is essential for normal development in zebrafish. The different zebrafish genomes contain several single‐nucleotide variations (SNPs) of the dut gene. One of the dUTPase variants displayed drastically lower protein stability and catalytic efficiency as compared ...
Viktória Perey‐Simon   +6 more
wiley   +1 more source

Position determination systems [PDF]

open access: yes, 1976
A system for an orbital antenna, operated at a synchronous altitude, to scan an area of a celestial body is disclosed. The antenna means comprises modules which are operated by a steering signal in a repetitive function for providing a scanning beam over
Shores, P. W.
core   +1 more source

Imaging through turbid layers by scanning the phase conjugated second harmonic radiation from a nanoparticle [PDF]

open access: yes, 2010
We demonstrate imaging through a turbid layer by using digital phase conjugation of the second harmonic field radiated from a beacon nanoparticle. We show that the phase-conjugated focus can be displaced from its initial position by illuminating the same
Grange, Rachel   +4 more
core   +2 more sources

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

open access: yesFEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Method and Means for an Improved Electron Beam Scanning System-Patent [PDF]

open access: yes, 1970
Electron beam scanning system for improved image definition and reduced power requirements for video signal ...
Hilborn, E. H.
core   +1 more source

Development of a beam propagation method to simulate the point spread function degradation in scattering media [PDF]

open access: yes, 2019
Scattering is one of the main issues that limit the imaging depth in deep tissue optical imaging. To characterize the role of scattering, we have developed a forward model based on the beam propagation method and established the link between the ...
Boas, David A.   +6 more
core   +1 more source

Thermoreflectance Detection of Point Defects Resulting from Focused Ion Beam Milling

open access: yesAdvanced Engineering Materials, EarlyView.
Focused ion beam (FIB) milling is a common tool for nanoscale material processing, however irradiation damage, redeposition, and contamination can occur. We use several characterization tools to show FIB‐induced effects beyond 1 mm from the milled area.
Thomas W. Pfeifer   +3 more
wiley   +1 more source

A Ka-band one-dimensional beam scanning leaky-wave antenna based on liquid crystal

open access: yesScientific Reports
Fixed frequency beam-scanning leaky-wave antennas have been a focus of attention for many scholars in recent years, and numerous related results have been obtained. However, these antennas suffer from several issues such as small beam-scanning range, low
Shunhu Hou   +6 more
doaj   +1 more source

A Review of Reconfigurable Leaky-Wave Antennas

open access: yesIEEE Access, 2021
A comprehensive survey of the reconfigurable leaky-wave antennas (LWAs) is made in this paper. Beam-steering and unique radiating features of LWA are highlighted particularly.
Nima Javanbakht   +3 more
doaj   +1 more source

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