Search for tag: "spatial frequency"

59:21 Valence EELS, High Energy Resolution Valence EELS, High Energy Resolution	Valence EELS, High Energy Resolution 2017 PARADIM SUMMER SCHOOL Low loss EELS David Muller optical spectroscopy formal sciences concepts in physics silicon rich silicon dioxide chemical elements band gap scattering electron density lowest energy feature reducing agents valence electrons quick rule pyrotechnic fuels electron microscope waveguide mode nuclear physics percent radius electron real trouble dielectric boundary conditions nice big factorial and binomial topics tightly bound electric field spatial resolution single scattering optics sample thickness interface plasma nano particles optical gap direct bandgap phosphates particle physics fluid dynamics high energy electron atomic physics dielectric responses biology and pharmacology of chemical elements liquid cell multiple scattering electron beam energy resolution tiny signal single particle transition cherenkov radiation electron gas free electron gas optical transition energy loss energy lost characteristic angle free electronic energy filter low energy charge oscillations valence region surface plasma toxicology free path silicon oxide optical spectra bulk material exit haitian call auspex fourier analysis quantum mechanics big background image charge electrostatics lastic scattering nice thing interesting standing wave bessel function boundary conditions ion image single particle standing wave modes funny feature electron states scattering event direct gap good free electron physical quantities energy loss function vector calculus dietary minerals absorption and radiative transfer (optics)electrical engineering thick sample field lines length scale electronics terminology electrodynamics phoria transform radiation sensitive caption complete hof plasma frequency log scale experimental particle physics hof epsilon semiconductor materials higher energy high frequency atomic resolution interface mode good news harmonic oscillator special relativity dielectric function diverges logarithmically shine light couple 100 volt t.m.incredibly complicated bad news electromagnetism energy range cherenkov modes 100 volt spherical modes linear operators in calculus chemistry bulk plasma From James Overhiser on February 15th, 2019 18 plays
01:23:44 Electron Tomography - Theory Electron Tomography - Theory	Electron Tomography - Theory 2017 PARADIM SUMMER SCHOOL Tomography Theory Ercius cartesian space dimensional space dimensional thing scale tomography dimensional reconstruction projection requirement solutions extremely high resolution original image physical science maximum tilting tilt series long time electron microscopy electron tomography compressed sensing inverse nanometers scientific techniques dimensional structure materials science equal angle signal processing concepts in physics photography low dose 1st thing point defect higher frequency single projection diffraction pattern pretty good microscopy needle sample big difference free transform original object spatial frequency vision carbon atom real space adam counting reciprocal space emerging technologies cat f.f.t.dimensional image perfect projections original projection atomic physics projected density experimental projections nano particles stem medical imaging high resolution carbon good reconstruction original projection direction unique object aberration corrected atomic scale beam electrons experimental data tilt axis original intensity nanometer depth pseudo polar microscopes reconstruction technique projection operation low frequency radio spectrum equally slope tomography quantum mechanics kinematics concentric squares cat scan higher dimensional quantum dot analytic geometry iterative loop entire image equal distance iterative algorithm classical mechanics digital photography called equally slope linear algebra grand challenge single particle simpler interpellation dimensional object geometry limitation high tilts nano scale phoria transform english alternative rock groups resolution tomography reconstruction packages building block caption complete digital geometry computer graphics free space reconstruction algorithm improve reconstructions high frequency atomic resolution projection image shell particle cohen resolution dimensional picture sine wave crystallographic defects t.m.advanced algorithms iterative process missing wedge information theory continuous function material science tomography experiment broadcasting mass sample things elementary mathematics chemistry electron microscope nanomaterials From James Overhiser on February 15th, 2019 11 plays
01:01:34 Linear Imaging Theory Linear Imaging Theory	Linear Imaging Theory 2017 PARADIM Linear Imaging Theory Robert Hovden d.n.a.dark field aperture size object function total intensity collaboration increases concepts in physics convergence angle area spherical aberration wide range covering today geometric shapes d.n.a. structure central minimum electron microscopy focal point intensity increases linear imaging model wave vectors control theory optical devices collection angle larger aperture electron microscope high angle architectural elements signal processing photography high pass filter transfer function uncorrected system phase shift darkfield regime functional form scattered electrons higher frequency bright field stem egyptian artefact types diffraction pattern science of photography point spread function high intensity probe elementary geometry integrals spatial frequency optics objective lens bright field regime bright spots real space low frequency reciprocal space blurring contribution sphere collaboration uncorrected instrument characteristic dimension incoherent imaging condition surfaces aperture function wave front atomic physics imaging mode contract transfer function white noise scanning transmission electron cohere imaging previous lecture distant plane elementary shapes stem higher angles high resolution incoherent linear image mil rating detector geometries field cone geometry types of functions aberration corrected constant phase length lower frequencies chromatic aberration conic sections amplitude squared aberration free scientific techniques microscopes measuring instruments intensity squared optic axis intensity decreases contrast transfer diffraction limit stem image individual atom radio spectrum incoherent imaging quantum mechanics aberration free probe multivariable calculus people meters focal plane bright field low angle amateur radio systems theory image plane coherent imaging condition collecting electrons blurring function transmission electron microscopy physical quantities digital photography angular spread double integral coherent imaging largest range face shift higher order aberrations raleigh criterion pio fairly interpretable transmission electron microscope square pulse geometrical optics digital signal processing 1st order caption complete probe tails nyquist limit blue curve subroutines broadcasting filter frequency response maximum frequency high frequency caustic curve hand side low pass filter spatial coordinates atoms closer coherent image sparrow criterion structural system pico meter dark background frequency space optimal aperture t.m.complex conjugate contrast transfer function wave function measure ultimately imaging condition annular darkfield incoherent imaging mode atomic number field stem atomic column inelastic interactions nobel prize angle medium chemistry focal imaging probe size From James Overhiser on February 15th, 2019 17 plays
$Thumbnail for entry Diffraction (Part 2)$ 01:07:41 Diffraction (Part 2) Diffraction (Part 2)	Diffraction (Part 2) 2017 PARADIM Diffraction part 2 David Muller central beam noise source aperture size n.c.concepts in physics ideal d.q.2nd thing readout noise high dynamic range mental plane thermal noise long time channel gain variations quantum electrodynamics digital imaging count rate optical devices fraction pattern pico amps long range biological imaging range electric fields huge amount signal processing geology d.p.photography thin pixel magnetic field hole pez c.c.d. camera electronics poisson distribution diffraction pattern electron hope point spread function 200 kilovolts $16.00 pico amps neighboring pixel square root mass signal standard deviation detective quantum efficiency spatial frequency optics real space research methods energy distribution magnetic ripples d.q.single electron sensitivity particle physics narrow pixel space measurement slowly varying abled sphere atomic physics imaging mode electric field energy deposited minus sigma pretty good emerging technologies electron beam noise dynamic range point $16.00 pico magnetism dock noise soft moon k.v.pulse counting detector lastic imaging modes e.q.low energy pretty darn good electrons arrive micron pixel fire electron random noise microscopes perfectly linear discrete distributions electron produces mass image percent variation technical details electron hole pay q.e.statistics electrostatics electronics terminology quantum mechanics field image single actor ideal detector multiple pixels grain contrast systems theory electron hole 1st time high count rates charge carriers huge number diffraction spot physical quantities digital photography full diffraction pattern noise time pulse counting beam energy high voltages output noise milli 2nd dynamical systems output signal low count rate dimensional data digital signal processing momentum transfer caption complete $150.00 micron information pixel array detector c.c.d.1000 electrons laboratory equipment cybernetics atomic resolution scientific method finite size fundamental limit noise ratio fraction spot quantum chemistry t.m.data evaluation methods electromagnetism momentum operator incident electron diffraction probability current flow rough rule beam current wave function diffraction work From James Overhiser on February 15th, 2019 15 plays
$Thumbnail for entry Diffraction (Part 1)$ 01:18:03 Diffraction (Part 1) Diffraction (Part 1)	Diffraction (Part 1) 2017 PARADIM Diffraction part 1 David Muller d.n.a.solid pole concepts in physics outgoing spherical wave positive nuclei ray diffraction experiment atomic physics diffracted beam nicely lined higher order silicon atom electron microscopy focal point image intensity zone axis symmetry zone axes optical devices fia fraction pattern teaching shape factor electron microscope audio engineering high angle nuclear physics fit scattering beautiful thing good approximation thin sample imaging method chip chip chip reciprocal lattice phase shift elastic scattering digital audio english indie rock groups diffraction pattern diffraction space geometric optics chemical elements big angles spatial resolution small angle scattering elementary special functions badly tilted spatial frequency adam layer real space lattice spacing delta function small angle measurement crystallography particle physics musical quintets time frequencies quantum chemistry scattering happened 1st column scattering oral communication plane wave atom column biology and pharmacology of chemical elements titanium column multi slice transmission function electron beam finite object surface normal big spacing periodic crystal soft moon forward direction synchrotron-related techniques wave number constant phase infinite series change shape travel parallel infinitely large crystal scientific techniques main thing sol microscopes mathematical physics contrast imaging optic axis shape fact transition metals initial wave forward scattering stem image reciprocal space spherical wave electronics terminology quantum mechanics field image neighboring column 1st approximation reducing agents fourier analysis analytic geometry furcal wave focal plane time varying bright field angle scattering order spot multi slice simulation image plane didactics scattering event physical aperture diffraction spot momentum space physical quantities phoria transform times worse 2nd ring single atom objective aperture dietary minerals absorption and radiative transfer (optics)trigonometry strong phase approximation unit cell field imaging carbon nitrogen stem mode metals diffraction peak inverse angstroms english alternative rock groups dog field geometrical optics parallel beam 1st order momentum transfer atomic resolution image year transform crystallography definition periodic table fiber optic waveguide pyrotechnic fuels central spot semiconductor materials mathematical notation caption complete finite size lattice image d.c.large angle fall field sine wave fraction spot functional analysis random orientation t.m.bad news initial wave function educational psychology acoustics information theory diffraction atomic number long rod wave function From James Overhiser on February 15th, 2019 30 plays