Fractures are common in real porous media and their transmissibilities can greatly effect flow patterns and hydrocarbonrecovery. Estimating these transmissibilities from limited data can be challenging. In this talk, we focus on a measure-theoretic inverse method used to determine the most likely values of transmissibilities based on data measur...
Creator:
Dawson, Clint (The University of Texas at Austin)
Created:
2018-10-22
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Inverse problems arise in all fields of science and technology, where information is obtained about an object from a set of observed measurements. Taking human vision as an example, our brains construct a detailed, 3-D map from measurements of scattered light that reach our retinas. Thus, solving inverse problems can reveal what is hidden. But c...
Creator:
Uhlmann, Gunther A. (University of Washington)
Created:
2017-02-13
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
DigitalGlobe operates a constellation of earth imaging satellites with the highest commercially available spatial resolution in the industry. WorldView-2, launched in 2009, is the first high-resolution 8-band multispectral commercial satellite, which is capable of collecting up to 1 million square kilometers of 8-band imagery per day. It provide...
Creator:
Bader, Brett (DigitalGlobe)
Created:
2013-09-25
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
The aim of this talk is to introduce a direct method allowing to solve numerically inverse type problems for linear hyperbolic equations. We first consider the reconstruction of the full solution of the equation from a partial distributed observation. We employ a least-squares technique and minimize the norm of the distance from the observation ...
Creator:
Cindea, Nicolae (Blaise Pascal University)
Created:
2016-03-24
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Predictive mathematical models normally follow the causal direction, forecasting consequences of known causes. The interpretation of measured data, on the other hand, moves in the opposite direction, looking for unknown causes of observed consequences. In practice, the interpretation of data entails solving an ill-posed inverse problem, The trad...
Creator:
Calvetti, Daniela (Case Western Reserve University)
Created:
2017-09-06
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
The standard problem of optical tomography is to obtain information about the optical properties of an object by making measurements on the boundary. Acousto-optic tomography is a variation of this problem where the object is perturbed by an acoustic field, and optical boundary measurements are taken as the parameters of the acoustic field vary....
Creator:
Chung, Francis (University of Kentucky)
Created:
2017-02-16
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
In this talk, we will review some key inverse problems in medical imaging and vision, in particular, segmentation and registration. The approach will be via energy minimization through the calculus of variations as well Bayesian. We will also show how these techniques made be made interactive through the use of feedback. This will allow us to ma...
Creator:
Tannenbaum, Allen (State University of New York, Stony Brook (SUNY))
Created:
2016-03-15
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
This talk concerns the inverse source scattering problem for acoustic, elastic, and electromagnetic waves. The first part is to discuss the inverse random source problems where the sources are assumed to be random functions driven by the additive white noise. The inverse problems are to determine statistical properties of the random sources from...
Creator:
Li, Peijun (Purdue University)
Created:
2017-03-09
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
This talk concerns the inverse source scattering problems for acoustic, elastic, and electromagnetic waves. The inverse random source problems will be discussed. The sources are assumed to be random functions driven by the additive white noise. The inverse problems are to determine statistical properties of the random sources from the boundary m...
Creator:
Li, Peijun (Purdue University)
Created:
2017-02-17
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Solving the phase retrieval problem, i.e. reconstructing a compact, multidimensional function from the modulus of its Fourier transform, has applications in astronomy, x-ray diffraction, optical wave-front sensing, and other areas of physics and engineering. To solve such problems, one must have constraints on the function in order to have a cha...
Creator:
Fienup, James R. (University of Rochester)
Created:
2005-11-09
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Colloidal suspensions consist of micron sized solid particlessuspended in a solvent. The particles are Brownian so that thesuspension as a whole behaves as a thermal system governed bythe laws of statistical mechanics. The thermodynamic nature ofthese systems allows scientists to use colloidal suspensions asmodels for investigating numerous proc...
Creator:
Cohen, Itai (Cornell University)
Created:
2008-07-22
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Over the last two decades, multiphoton microscopy has created a renaissance in the brain imaging community. It has changed how we visualize neurons by providing high-resolution, non-invasive imaging capability deep within intact brain tissue. Multiphoton imaging will likely play an essential role in understanding how the brain works at the level...
Creator:
Xu, Chris (Cornell University)
Created:
2017-02-15
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Diego and Mario di Bernardo (University of Naples Federico II and University of Bristol)Automatic control of gene expression in living cells is of paramount importance to characterise both endogenous gene regulatory networks and synthetic circuits. In addition, such a technology can be used to maintain the expression of synthetic circuit's compo...
Creator:
di Bernardo, Diego (Università di Napoli 'Federico II'); di Bernardo, Mario (University of Bristol)
Created:
2015-11-18
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
This collection traces the history of seven Dutch sugar plantations in Guiana (the colony of Surinam) through nearly a century of major developments, including the Napoleonic Wars and the transition from a slave to a free labor economy. The records consist of correspondence regarding the administration of the plantations in the Surinam colony, a...
Created:
1768-04-06
Contributed By:
University of Minnesota Libraries, James Ford Bell Library.
This collection traces the history of seven Dutch sugar plantations in Guiana (the colony of Surinam) through nearly a century of major developments, including the Napoleonic Wars and the transition from a slave to a free labor economy. The records consist of correspondence regarding the administration of the plantations in the Surinam colony, a...
Created:
1768-01-29
Contributed By:
University of Minnesota Libraries, James Ford Bell Library.
This collection traces the history of seven Dutch sugar plantations in Guiana (the colony of Surinam) through nearly a century of major developments, including the Napoleonic Wars and the transition from a slave to a free labor economy. The records consist of correspondence regarding the administration of the plantations in the Surinam colony, a...
Created:
1768
Contributed By:
University of Minnesota Libraries, James Ford Bell Library.
This collection traces the history of seven Dutch sugar plantations in Guiana (the colony of Surinam) through nearly a century of major developments, including the Napoleonic Wars and the transition from a slave to a free labor economy. The records consist of correspondence regarding the administration of the plantations in the Surinam colony, a...
Created:
1827
Contributed By:
University of Minnesota Libraries, James Ford Bell Library.
Holiness to the Lord is inscribed above this arch. A keystone with H.T.W.S.S.T.K.S (Hiram of Tyre's widow's son sent to King Solomon) is inscribed upon the keystone.
Contributed By:
University of Minnesota Libraries, Performing Arts Archives.
A balance between excitation and inhibition is necessary to maintain stable brain network dynamics. Traditionally, seizure activity is believed to arise from the breakdown of this delicate balance in favor of excitation with loss of inhibition. Surprisingly, recent experimental evidence suggests that this conventional view may be limited, and th...
Creator:
Bazhenov, Maksim (University of California, San Diego)
Created:
2018-02-15
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
