Search

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012., Cataloged from PDF version of thesis., Includes bibliographical references (p. 301-312)., Modeling visual scenes is one of the fundamental tasks of computer vision. Whereas tremendous efforts have been devoted to video analysis in past decades, most prior work focuses on specific tasks, leading to dedicated methods to solve them. This PhD thesis instead aims to derive a probabilistic generative model that coherently integrates different aspects, notably appearance, motion, and the interaction between them. Specifically, this model considers each video as a composite of dynamic layers, each associated with a covering domain, an appearance template, and a flow describing its motion. These layers change dynamically following the associated flows, and are combined into video frames according to a Z-order that specifies their relative depth-order. To describe these layers and their dynamic changes, three major components are incorporated: (1) An appearance model describes the generative process of the pixel values of a video layer. This model, via the combination of a probabilistic patch manifold and a conditional Markov random field, is able to express rich local details while maintaining global coherence. (2) A motion model captures the motion pattern of a layer through a new concept called geometric flow that originates from differential geometric analysis. A geometric flow unifies the trajectory-based representation and the notion of geometric transformation to represent the collective dynamic behaviors persisting over time. (3) A partial Z-order specifies the relative depth order between layers. Here, through the unique correspondence between equivalent classes of partial orders and consistent choice functions, a distribution over the spaces of partial orders is established, and inference can thus be performed thereon. The development of these models leads to significant challenges in probabilistic modeling and inference that need new techniques to address. We studied two important problems: (1) Both the appearance model and the motion model rely on mixt, by Dahua Lin., Ph.D.

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012., Cataloged from PDF version of thesis., Includes bibliographical references (p. 301-312)., Modeling visual scenes is one of the fundamental tasks of computer vision. Whereas tremendous efforts have been devoted to video analysis in past decades, most prior work focuses on specific tasks, leading to dedicated methods to solve them. This PhD thesis instead aims to derive a probabilistic generative model that coherently integrates different aspects, notably appearance, motion, and the interaction between them. Specifically, this model considers each video as a composite of dynamic layers, each associated with a covering domain, an appearance template, and a flow describing its motion. These layers change dynamically following the associated flows, and are combined into video frames according to a Z-order that specifies their relative depth-order. To describe these layers and their dynamic changes, three major components are incorporated: (1) An appearance model describes the generative process of the pixel values of a video layer. This model, via the combination of a probabilistic patch manifold and a conditional Markov random field, is able to express rich local details while maintaining global coherence. (2) A motion model captures the motion pattern of a layer through a new concept called geometric flow that originates from differential geometric analysis. A geometric flow unifies the trajectory-based representation and the notion of geometric transformation to represent the collective dynamic behaviors persisting over time. (3) A partial Z-order specifies the relative depth order between layers. Here, through the unique correspondence between equivalent classes of partial orders and consistent choice functions, a distribution over the spaces of partial orders is established, and inference can thus be performed thereon. The development of these models leads to significant challenges in probabilistic modeling and inference that need new techniques to address. We studied two important problems: (1) Both the appearance model and the motion model rely on mixt, by Dahua Lin., Ph.D.

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012., Cataloged from PDF version of thesis., Includes bibliographical references (p. 301-312)., Modeling visual scenes is one of the fundamental tasks of computer vision. Whereas tremendous efforts have been devoted to video analysis in past decades, most prior work focuses on specific tasks, leading to dedicated methods to solve them. This PhD thesis instead aims to derive a probabilistic generative model that coherently integrates different aspects, notably appearance, motion, and the interaction between them. Specifically, this model considers each video as a composite of dynamic layers, each associated with a covering domain, an appearance template, and a flow describing its motion. These layers change dynamically following the associated flows, and are combined into video frames according to a Z-order that specifies their relative depth-order. To describe these layers and their dynamic changes, three major components are incorporated: (1) An appearance model describes the generative process of the pixel values of a video layer. This model, via the combination of a probabilistic patch manifold and a conditional Markov random field, is able to express rich local details while maintaining global coherence. (2) A motion model captures the motion pattern of a layer through a new concept called geometric flow that originates from differential geometric analysis. A geometric flow unifies the trajectory-based representation and the notion of geometric transformation to represent the collective dynamic behaviors persisting over time. (3) A partial Z-order specifies the relative depth order between layers. Here, through the unique correspondence between equivalent classes of partial orders and consistent choice functions, a distribution over the spaces of partial orders is established, and inference can thus be performed thereon. The development of these models leads to significant challenges in probabilistic modeling and inference that need new techniques to address. We studied two important problems: (1) Both the appearance model and the motion model rely on mixt, by Dahua Lin., Ph.D.

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010., This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections., Cataloged from student-submitted PDF version of thesis., Includes bibliographical references (p. 125-127)., In order to utilize mobile sensor nodes in a sensing and estimation problem, one must carefully consider the optimal placement of those sensor nodes and simultaneously account for the cost incurred in moving the sensor nodes. We present an approximate dynamic programming approach to a tracking problem with mobile sensor nodes. We utilize mutual information as the objective for optimal sensor placement. We show how a constrained dynamic programming approach allows us to balance estimation quality against mobility costs. However this constrained optimization problem is NP-hard. We present a set of approximations that allow this dynamic program to be solved with polynomial complexity in the number of sensors. We present a greedy multiple time step planning algorithm that greedily selects the most informative paths over a fixed planning horizon. These approximation algorithms are verified via simulation to give a comparative analysis of estimate quality and mobility costs., by John A. Russ., S.M.

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010., This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections., Cataloged from student-submitted PDF version of thesis., Includes bibliographical references (p. 125-127)., In order to utilize mobile sensor nodes in a sensing and estimation problem, one must carefully consider the optimal placement of those sensor nodes and simultaneously account for the cost incurred in moving the sensor nodes. We present an approximate dynamic programming approach to a tracking problem with mobile sensor nodes. We utilize mutual information as the objective for optimal sensor placement. We show how a constrained dynamic programming approach allows us to balance estimation quality against mobility costs. However this constrained optimization problem is NP-hard. We present a set of approximations that allow this dynamic program to be solved with polynomial complexity in the number of sensors. We present a greedy multiple time step planning algorithm that greedily selects the most informative paths over a fixed planning horizon. These approximation algorithms are verified via simulation to give a comparative analysis of estimate quality and mobility costs., by John A. Russ., S.M.

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010., This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections., Cataloged from student-submitted PDF version of thesis., Includes bibliographical references (p. 125-127)., In order to utilize mobile sensor nodes in a sensing and estimation problem, one must carefully consider the optimal placement of those sensor nodes and simultaneously account for the cost incurred in moving the sensor nodes. We present an approximate dynamic programming approach to a tracking problem with mobile sensor nodes. We utilize mutual information as the objective for optimal sensor placement. We show how a constrained dynamic programming approach allows us to balance estimation quality against mobility costs. However this constrained optimization problem is NP-hard. We present a set of approximations that allow this dynamic program to be solved with polynomial complexity in the number of sensors. We present a greedy multiple time step planning algorithm that greedily selects the most informative paths over a fixed planning horizon. These approximation algorithms are verified via simulation to give a comparative analysis of estimate quality and mobility costs., by John A. Russ., S.M.

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2006., Includes bibliographical references (p. 156-166)., An important goal in genomic research is the reconstruction of the complete picture of temporal interactions among all genes, but this inference problem is not tractable because of the large number of genes, the small number of experimental observations for each gene, and the complexity of biological networks. We focus instead on the B cell receptor (BCR) signaling pathway, which narrows the inference problem and provides a clinical application, as B cell chronic lymphocytic leukemia (B-CLL) is believed to be related to BCR response. In this work, we infer population-dependent gene networks of temporal interaction within the BCR signaling pathway. We develop simple statistical models that capture the temporal behavior of differentially expressed genes and then estimate the parameters in an Expectation-Maximization framework, resulting in clusters with a biological interpretation for each subject population. Using the cluster labels to define a small number of modes of interaction and imposing sparsity constraints to effectively limit the number of genes influencing each target gene makes the ill-posed problem of network inference tractable., (cont.) For both the clustering and the inference of the predictive models, we have statistical results that show that we successfully capture the temporal structure of and the interactions between the genes relevant to the BCR. signaling pathway. We have confirmatory results from a biological standpoint, in which genes that we have identified as playing key roles in the networks have already been shown in previous work to be relevant to BCR. stimulation, but we also have results that guide future experiments in the study of other related genes, in order to further the long term goal of a full understanding of how and why B-CLL cells behave abnormally., by Corey Ann Kemper., Ph.D.

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2006., Includes bibliographical references (p. 156-166)., An important goal in genomic research is the reconstruction of the complete picture of temporal interactions among all genes, but this inference problem is not tractable because of the large number of genes, the small number of experimental observations for each gene, and the complexity of biological networks. We focus instead on the B cell receptor (BCR) signaling pathway, which narrows the inference problem and provides a clinical application, as B cell chronic lymphocytic leukemia (B-CLL) is believed to be related to BCR response. In this work, we infer population-dependent gene networks of temporal interaction within the BCR signaling pathway. We develop simple statistical models that capture the temporal behavior of differentially expressed genes and then estimate the parameters in an Expectation-Maximization framework, resulting in clusters with a biological interpretation for each subject population. Using the cluster labels to define a small number of modes of interaction and imposing sparsity constraints to effectively limit the number of genes influencing each target gene makes the ill-posed problem of network inference tractable., (cont.) For both the clustering and the inference of the predictive models, we have statistical results that show that we successfully capture the temporal structure of and the interactions between the genes relevant to the BCR. signaling pathway. We have confirmatory results from a biological standpoint, in which genes that we have identified as playing key roles in the networks have already been shown in previous work to be relevant to BCR. stimulation, but we also have results that guide future experiments in the study of other related genes, in order to further the long term goal of a full understanding of how and why B-CLL cells behave abnormally., by Corey Ann Kemper., Ph.D.

NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. A theoretical and laboratory investigation was made of antidunes and associated stationary waves. The objectives were to determine the factors involved in the formation of antidunes, the characteristics of the stationary waves, and the effects of antidunes and waves on the friction factor and sediment transport capacity of streams. In the potential flow solution for flow over a wavy bed it was hypothesized that the flow shapes the erodible sand bed by scour and deposition to conform to a streamline of the flow configuration for which the energy is a minimum. Under this hypothesis, flow over antidunes is the same as the segment of flow above an intermediate streamline of the fluid motion associated with stationary gravity waves (waves with celerity equal and opposite to the flow velocity) in a fluid of infinite depth. For a velocity V the wave length, [lambda] is given by [lambda] and waves break when their height reaches 0.142[lambda]. Laboratory and field data for two-dimensional antidunes confirmed these relations. Forty-three experimental runs in laboratory flumes were made for different depths and velocities and bed sands of two different sizes (0.55 mm and 0.23 mm). No general criterion for the formation of antidunes or the occurrence of breaking waves could be formulated because of inadequate knowledge of the complex sediment transport phenomenon. Qualitatively, it was found that for a given sand, the critical Froude number for the occurrence of breaking waves decreased as the depth was increased. Over a certain range of depth and velocity it was found that the flow formed waves and antidunes or was uniform depending on whether or not the flow was disturbed to form an initial wave. Waves that did not break had no measurable effect on the transport capacity or friction factor, but breaking waves increased both of these quantities.

NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. A theoretical and laboratory investigation was made of antidunes and associated stationary waves. The objectives were to determine the factors involved in the formation of antidunes, the characteristics of the stationary waves, and the effects of antidunes and waves on the friction factor and sediment transport capacity of streams. In the potential flow solution for flow over a wavy bed it was hypothesized that the flow shapes the erodible sand bed by scour and deposition to conform to a streamline of the flow configuration for which the energy is a minimum. Under this hypothesis, flow over antidunes is the same as the segment of flow above an intermediate streamline of the fluid motion associated with stationary gravity waves (waves with celerity equal and opposite to the flow velocity) in a fluid of infinite depth. For a velocity V the wave length, [lambda] is given by [lambda] and waves break when their height reaches 0.142[lambda]. Laboratory and field data for two-dimensional antidunes confirmed these relations. Forty-three experimental runs in laboratory flumes were made for different depths and velocities and bed sands of two different sizes (0.55 mm and 0.23 mm). No general criterion for the formation of antidunes or the occurrence of breaking waves could be formulated because of inadequate knowledge of the complex sediment transport phenomenon. Qualitatively, it was found that for a given sand, the critical Froude number for the occurrence of breaking waves decreased as the depth was increased. Over a certain range of depth and velocity it was found that the flow formed waves and antidunes or was uniform depending on whether or not the flow was disturbed to form an initial wave. Waves that did not break had no measurable effect on the transport capacity or friction factor, but breaking waves increased both of these quantities.

BED ARMORING PROCEDURES IN IALLUVIAL AND APPLICATION TO THE MISSOURI RIVER by M. F. Karim, F. M. Holly, and J. F. Kennedy Sponsored by U.S. Army Corps of Engineers Omaha District, Nebraska Contract No. DACW45-79-C-0020 TC 24 .164 no.269 1983 IIHR Report No. 269 Iowa Institute of Hydraulic Research The University of Iowa Iowa City, Iowa 52242 December 1983 UBRARf* FEB 12’86 gweau of Reclamate Stenver, Colorado i BED ARMORING PROCEDURES IN IALLUVIAL AND APPLICATION TO THE MISSOURI RIVER by M. F. Karim, F. M. Holly, and J. F. Kennedy Sponsored by U.S. Army Corps of Engineers Omaha District, Nebraska Contract No. DACW45-79-C-0020 IIHR Report No. 269 Iowa Institute of Hydraulic Research The University of Iowa Iowa City, Iowa 52242 December 1983 92010139 EXECUTIVE SUMMARY The ¡ALLUVIAL computer program for prediction of long-term bed evolution in alluvial rivers was designed to take into account the effects of bed armoring on sediment transport and flow resistance. Recent studies of Missouri River bed evolution using ¡ALLUVIAL have demonstrated the sensitivity of ultimate bed degradation to armoring. The purpose of this study was to reassess critically the conceptual model of armoring used in ¡ALLUVIAL, propose alternative methodologies having clearer physical bases, and test these alternatives on the Missouri River between Gavins Point Dam and Omaha. The results of this study suggest that the fundamental armoring approach initially adopted should be retained; this approach involves use of a so-called armoring factor, defined as the fraction of bed surface covered by immobile particles, as a correction factor for reducing theoretical sediment transport capacity, reducing theoretical dune heights, and allocating energy losses between bed form resistance and surface roughness resistance. However the computation of the armoring factor itself has been considerably modified to take into account persistence in time, moving dune effects, and the stochastic nature of incipient pa

Vol. 19, No. 25; Weekly edition. Items scanned from microfilm of varying quality--some editions are difficult to read, mostly from 1972-1974.

Student Brass Quintet: Don Fisher, trumpet, Barbara Bell, trumpet, Toni Nunemaker, horn, Rick Mizell, trombone, Phil Black, tuba.; John Andreko is assisted by Marcia Miller, piano.; The Brass Quintet is under the musical supervision of J. Lesley Varner., Series XXIX, Number 46., This archival material has been provided for educational purposes. Ball State University Libraries recognizes that some historic items may include offensive content. Our statement regarding objectionable content is available at: https://dmr.bsu.edu/digital/about

A laboratory study was made to determine the variation with depth and velocity of the hydraulic and sediment transport characteristics of a constant-discharge flow. Eight experimental runs were performed in a 60-foot long, 33.5-inch wide recirculating laboratory flume. The unit discharge for all runs was 0.50 cfs per ft. and the velocity was varied from 0.91 to 2.21 fps, corresponding to a change in depth from 0.550 to 0.228 ft. The bed sand used for these experiments had a geometric mean sieve diameter of 0.142 mm and a geometric standard deviation of 1.38. As the velocity was increased, the bed form changed from a dune-covered configuration to a flat bed, with sand waves occurring at intermediate velocities. It was found that for the unit discharge and bed sand used in this investigation, two different velocities and sediment transport rates are possible for a given slope, or a given bed shear velocity; however, this multiplicity is possible only in the range of slope and shear velocity where major changes in the bed configuration occur since it is a result of large variations in the bed roughness. Therefore the slope or shear velocity cannot logically be used as an independent variable since neither of these quantities uniquely determines the velocity or transport rate. However, if the velocity is used as the independent variable for a constant-discharge flow, the slope, shear velocity, and friction factor are all uniquely determined. The sediment transport rate was found to be a single-valued, uniformly increasing function of velocity, and it can therefore be used in place of the velocity as the independent variable. A comparison of data from this investigation with data from previous investigations which used the same sand showed that even a small decrease in the amount of fine material in the bed sand can have a significant effect on the transport rate. However, even relatively large changes in the standard deviation of the bed material have a small effect on

These notes have been prepared for a series of lectures on sediment transportation and channel stability given by the authors to a group of engineers and geologists of the U. S. Department of Agriculture assembled at Caltech on September 12-16,1960. The material herein is not intended to serve as a complete textbook, because it covers only subjects of the one-week sequence of lectures Due to limitation of space and time, coverage of many subjects is brief and others are omitted altogether. At the end of each chapter the reader will find a selected list of references for more detailed study.

A theoretical and laboratory investigation was made of antidunes and associated stationary waves. The objectives were to determine the factors involved in the formation of antidunes, the characteristics of the stationary waves, and the effects of antidunes and waves on the friction factor and sediment transport capacity of streams. In the potential flow solution for flow over a wavy bed it was hypothesized that the flow shapes the erodible sand bed by scour and deposition to conform to a streamline of the flow configuration for which the energy is a minimum. Under this hypothesis, flow over antidunes is the same as the segment of flow above an intermediate streamline of the fluid motion associated with stationary gravity waves (waves with celerity equal and opposite to the flow velocity) in a fluid of infinite depth. For a velocity V the wave length, L, is given by L = (2*pi*V^2)/g and waves break when their height reaches 0.142 L. Laboratory and field data for two-dimensional stationary waves and antidunes confirmed these relations. For the same velocity, short-crested, three-dimensional waves (rooster tails) have shorter wave lengths than two-dimensional waves. Forty-three experimental runs in laboratory flumes were made for different depths and velocities and bed sands of two different sizes (0.549 mm and 0.233 mm). No general criterion for the formation of antidunes or the occurrence of breaking waves could be formulated because of inadequate knowledge of the complex sediment transport phenomenon. Qualitatively, it was found that for a given sand, the critical Froude number for the occurrence of breaking waves decreased as the depth was increased. Over a certain range of depth and velocity it was found that the flow formed waves and antidunes or was uniform depending on whether or not the flow was disturbed to form an initial wave. Waves that did not break had no measurable effect on the transport capacity or friction factor, but breaking waves increased both of

Student Brass Quintet: Don Fisher, trumpet, Barbara Bell, trumpet, Toni Nunemaker, horn, Rick Mizell, trombone, Phil Black, tuba.; John Andreko is assisted by Marcia Miller, piano.; The Brass Quintet is under the musical supervision of J. Lesley Varner., Series XXIX, Number 46., This archival material has been provided for educational purposes. Ball State University Libraries recognizes that some historic items may include offensive content. Our statement regarding objectionable content is available at: https://dmr.bsu.edu/digital/about

Vol. 9, No. 12; Madison edition; Frequency varies

Issue of Esprit: The University of Scranton Review of Arts and Letters, a publication of the University of Scranton English Department.

Comprend : Assertio omnium articulorum per Bullam Leonis, X. novissimam damnatorum, Avec mode texte

Avec mode texte

Avec mode texte

Avec mode texte

Avec mode texte

Avec mode texte

Collection : French books 1601-1700 ; 60.6, Contient une table des matières

End of text.; Written in formal humanistic script by Peter Meghen, the protégé of Erasmus., Please note that if this image is under copyright, you may need to contact one or more copyright owners for any use that is not permitted under the ARTstor Terms and Conditions of Use or not otherwise permitted by law. While ARTstor tries to update contact information, it cannot guarantee that such information is always accurate. Determining whether those permissions are necessary, and obtaining such permissions, is your sole responsibility.

Text pages.; Written in formal humanistic script by Peter Meghen, the protégé of Erasmus., Please note that if this image is under copyright, you may need to contact one or more copyright owners for any use that is not permitted under the ARTstor Terms and Conditions of Use or not otherwise permitted by law. While ARTstor tries to update contact information, it cannot guarantee that such information is always accurate. Determining whether those permissions are necessary, and obtaining such permissions, is your sole responsibility.

Text pages.; Written in formal humanistic script by Peter Meghen, the protégé of Erasmus., Please note that if this image is under copyright, you may need to contact one or more copyright owners for any use that is not permitted under the ARTstor Terms and Conditions of Use or not otherwise permitted by law. While ARTstor tries to update contact information, it cannot guarantee that such information is always accurate. Determining whether those permissions are necessary, and obtaining such permissions, is your sole responsibility.

Text pages.; Written in formal humanistic script by Peter Meghen, the protégé of Erasmus., Please note that if this image is under copyright, you may need to contact one or more copyright owners for any use that is not permitted under the ARTstor Terms and Conditions of Use or not otherwise permitted by law. While ARTstor tries to update contact information, it cannot guarantee that such information is always accurate. Determining whether those permissions are necessary, and obtaining such permissions, is your sole responsibility.

Text pages.; Written in formal humanistic script by Peter Meghen, the protégé of Erasmus., Please note that if this image is under copyright, you may need to contact one or more copyright owners for any use that is not permitted under the ARTstor Terms and Conditions of Use or not otherwise permitted by law. While ARTstor tries to update contact information, it cannot guarantee that such information is always accurate. Determining whether those permissions are necessary, and obtaining such permissions, is your sole responsibility.

Start of text.; Written in formal humanistic script by Peter Meghen, the protégé of Erasmus., Please note that if this image is under copyright, you may need to contact one or more copyright owners for any use that is not permitted under the ARTstor Terms and Conditions of Use or not otherwise permitted by law. While ARTstor tries to update contact information, it cannot guarantee that such information is always accurate. Determining whether those permissions are necessary, and obtaining such permissions, is your sole responsibility.

Text pages.; Written in formal humanistic script by Peter Meghen, the protégé of Erasmus., Please note that if this image is under copyright, you may need to contact one or more copyright owners for any use that is not permitted under the ARTstor Terms and Conditions of Use or not otherwise permitted by law. While ARTstor tries to update contact information, it cannot guarantee that such information is always accurate. Determining whether those permissions are necessary, and obtaining such permissions, is your sole responsibility.

Text pages.; Written in formal humanistic script by Peter Meghen, the protégé of Erasmus., Please note that if this image is under copyright, you may need to contact one or more copyright owners for any use that is not permitted under the ARTstor Terms and Conditions of Use or not otherwise permitted by law. While ARTstor tries to update contact information, it cannot guarantee that such information is always accurate. Determining whether those permissions are necessary, and obtaining such permissions, is your sole responsibility.

Collection : French books 1601-1700 ; 60.6, Collection : French books 1601-1700 ; 60.6, Contient une table des matières

This archival material has been provided for educational purposes. Ball State University Libraries recognizes that some historic items may include offensive content. Our statement regarding objectionable content is available at: https://dmr.bsu.edu/digital/about