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So Near, Yet So Far: Migration, the Mediterranean, and a Murderous Modernity

Iain Chambers
2021
This postcolonial return operates a cut in the existing epistemological fabric. Understandings of space and time are radically reconfigured. Refused archives emerge.  ...  What until recently was maintained at a physical and metaphysical distance colonialism, racial hierarchies and historical amnesia, has suddenly acquired a dramatic presence with an alarming proximity.  ...  For "scholars are caught in the circularity of the archive and continue not only to operate within it but to operate it.  ... 
doi:10.6092/issn.2724-2463/12252 fatcat:www735b365dshe7uucquicvtya

Learning Proximal Operators to Discover Multiple Optima [article]

Lingxiao Li, Noam Aigerman, Vladimir G. Kim, Jiajin Li, Kristjan Greenewald, Mikhail Yurochkin, Justin Solomon
2022 arXiv   pre-print
, training of the proximal operator converges globally in the over-parameterized setting.  ...  We present an end-to-end method to learn the proximal operator across a family of non-convex problems, which can then be used to recover multiple solutions for unseen problems at test time.  ...  Intuitively, the proximal operator runs a single step of the proximal-point algorithm on an input point, making local improvement without moving too far from the input.  ... 
arXiv:2201.11945v1 fatcat:fzet2z2ye5d6za5yimbrtjr5cy

Local Kernels That Approximate Bayesian Regularization and Proximal Operators

Frank Ong, Peyman Milanfar, Pascal Getreuer
2019 IEEE Transactions on Image Processing  
least squares, and the related concept of proximal operators.  ...  The latter set of variational/Bayesian/proximal formulations often result in optimization problems that do not have closed-form solutions, and therefore typically require global iterative solutions.  ...  MAP Denoising and Proximal Operators Bayesian denoising invokes the use of a prior P (u) on the class of "clean" images u.  ... 
doi:10.1109/tip.2019.2893071 fatcat:xei3tipscfaa7oacs4sbrhqiti

Nonlinear Control of Motion Synchronization for Satellite Proximity Operations

Kamesh Subbarao, Sam James Welsh
2008 Journal of Guidance Control and Dynamics  
Conditions 3 and 4 ensure that near M and far away from the origin, the rate of change of a second bounded auxiliary function is of constant sign and bounded away from zero.  ...  well as details on sites that are expected to be operational in the near future.  ... 
doi:10.2514/1.34248 fatcat:vrvf3zyl2vgt5m4ygepkudgqxi

Proximity Operator of the Matrix Perspective Function and its Applications

Joong-Ho Won
2020 Neural Information Processing Systems  
We show that the matrix perspective function, which is jointly convex in the Cartesian product of a standard Euclidean vector space and a conformal space of symmetric matrices, has a proximity operator  ...  Using this routine as a building block, we demonstrate the usefulness of the studied proximity operator in constrained maximum likelihood estimation of Gaussian mean and covariance, peudolikelihoodbased  ...  Acknowledgments and Disclosure of Funding This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1A2C1007126).  ... 
dblp:conf/nips/Won20 fatcat:mn7evsqb6rg6njunyjp7wofp5y

TFIIH Operates through an Expanded Proximal Promoter To Fine-Tune c-myc Expression

A. Weber, J. Liu, I. Collins, D. Levens
2004 Molecular and Cellular Biology  
The general transcription factor IIH (TFIIH) is held at promoters prior to promoter escape and so is well situated to channel the input of activators and repressors to modulate c-myc expression.  ...  Here, we show structural, compositional, and functional differences in transcription complexes between XPB and XPB/wt-89 cells at the native c-myc promoter.  ...  (AW2397/1-1 and AW2397/2-1).  ... 
doi:10.1128/mcb.25.1.147-161.2005 pmid:15601838 pmcid:PMC538784 fatcat:fo3vh7rw6naotnn2f6xu5gmesa

Residential proximity to high-density poultry operations associated with campylobacteriosis and infectious diarrhea

Melissa N. Poulsen, Jonathan Pollak, Deborah L. Sills, Joan A. Casey, Sara G. Rasmussen, Keeve E. Nachman, Sara E. Cosgrove, Dalton Stewart, Brian S. Schwartz
2018 International Journal of Hygiene and Environmental Health  
To evaluate associations between residential proximity to high-density poultry operations and individual-level diarrheal illnesses, we conducted a nested case-control study among 514,488 patients in Pennsylvania  ...  Patients in the second and fourth (versus first) quartiles of the poultry operation activity metric had  ...  Environmental transmission of these pathogens from poultry operations to humans presents an additional, though far less-studied risk.  ... 
doi:10.1016/j.ijheh.2017.12.005 pmid:29268955 pmcid:PMC5880295 fatcat:yksop6xzqbfbxljmchs4emi3jm

Efficacy of Direct Restorative Materials in Proximal Box Elevation on the Margin Quality and Fracture Resistance of Molars Restored With CAD/CAM Onlays

TD Grubbs, M Vargas, J Kolker, EC Teixeira
2019 Operative dentistry  
The purpose of this study was to investigate the effect of four direct restorative materials that can be used in the proximal box elevation (PBE) technique.  ...  at 65N and 37°C).  ...  relocation for as it is less costly and requires far less time.  ... 
doi:10.2341/18-098-l pmid:31084532 fatcat:shr7gkemcnbk7oemk5kpzsut5i

Close Proximity Operations for Implementing Mitigation Strategies

Daniel Scheeres
2004 2004 Planetary Defense Conference: Protecting Earth from Asteroids   unpublished
the problem of operating on and in close proximity to the surface of these small bodies.  ...  To succesfully carry out close proximity operations about these bodies requires an understanding of the orbital dynamics close to them, a knowledge of the physical properties of the body and the spacecraft  ...  The NEAR spacecraft design is appropriate for larger bodies such as Eros and was operated in that environment with a relatively small operations team.  ... 
doi:10.2514/6.2004-1445 fatcat:pu243zbuhfgijhoxdxdmhkrd2a

Sewing Proximals on the Ascending Aorta during CABG Operations

Curt Tribble, Nick Teman
2022
This article will address the common issues to be considered in creating proximal vein graft anastomoses in a standard coronary artery bypass operation. Let's get started .....  ...  the proximal anastomoses for coronary artery bypass grafts.  ...  note, you might also consider placing the ventricular pacing wires after placing the posterior tube and while the left ventricle is not yet full and beating vigorously, since doing so won't increase the  ... 
doi:10.1532/hsf.4789 pmid:35486040 fatcat:j3m2qkghd5giloxmahmckhb4ra

SISPO: Space Imaging Simulator for Proximity Operations

Mihkel Pajusalu, Iaroslav Iakubivskyi, Gabriel Jörg Schwarzkopf, Olli Knuuttila, Timo Väisänen, Maximilian Bührer, Mario F Palos, Hans Teras, Guillaume Le Bonhomme, Jaan Praks, Andris Slavinskis
2022
The simulator concentrates on realistic surface rendering and has supplementary models to produce realistic dust- and gas-environment optical models for comets and active asteroids.  ...  The framework also includes tools to simulate the most common image aberrations, such as tangential and sagittal astigmatism, internal and external comatic aberration, and simple geometric distortions.  ...  Thanks to the University of Dundee and Martin Dunstan for developing and providing PANGU software and helping to set it up.  ... 
doi:10.1371/journal.pone.0263882 pmid:35245306 pmcid:PMC8896705 fatcat:zkcl43eklndkxei42bj5enoavm

Six dimensional trajectory solver for autonomous proximity operations

RONALD SIMMONS, EDWARD BERGMANN, BRUCE PERSSON, WALTER HOLLISTER
1990 Guidance, Navigation and Control Conference   unpublished
To accomplish these missions and to improve the reliability of proximity operations for rescue missions, an autonomous system for proximity operations must be developed.  ...  Future proximity operations are expected to be considerably more complex in both planning and execution.  ...  These include the obstacle positions and velocities as well as the step sizes used in the algorithm execution.  ... 
doi:10.2514/6.1990-3459 fatcat:7iehzceq2feivoty4hem7tz454

Optimizing Optimization: Scalable Convex Programming with Proximal Operators

Matt Wytock
2018
This representation serves two purposes: 1) many problems can be expressed in terms of functions with simple proximal operators, and 2) the proximal operator form serves as a general interface to any specialized  ...  However, unlike linear and quadratic programming, general convex solvers have not yet reached sufficient maturity to fully decouple the convex programming model from the numerical algorithms required for  ...  This represents a valid proximal operator so no further transformations are necessary and the argument −x is returned as-is. • Epigraph transformation.  ... 
doi:10.1184/r1/6720977.v1 fatcat:ukt3fhiulbcorct3itkjmdq37a

Orion Rendezvous, Proximity Operations and Docking Design and Analysis

Chris D' Souza, Chad Hannak, Pete Spehar, Fred Clark, Mark Jackson
2007 AIAA Guidance, Navigation and Control Conference and Exhibit   unpublished
The Orion vehicle will be required to perform rendezvous, proximity operations, and docking with the International Space Station (ISS) and the Earth Departure Stage (EDS)/Lunar Landing Vehicle (LLV) stack  ...  The RPOD system, which consists of sensors, actuators, and software is being designed to be flexible and robust enough to perform RPOD with different vehicles in different environments.  ...  Acknowledgments The authors would like to thank Scott Cryan for providing the sensor concept of operations figure.  ... 
doi:10.2514/6.2007-6683 fatcat:nov7pqwotrfzfckvp2k7alcmmm

Close proximity operations at small bodies: orbiting, hovering, and hopping [chapter]

Daniel J. Scheeres, Michael J. S. Belton, Thomas H. Morgan, Nalin H. Samarasinha, Donald K. Yeomans
Mitigation of Hazardous Comets and Asteroids  
Spacecraft designs and mission operation concepts can be driven in very different directions as a function of the close proximity dynamical environment.  ...  to the problem of operating in close proximity to these small bodies. same orbits, due to solar radiation pressure effects, can be very unstable and lead to impact with the asteroid within a few orbits  ...  Space Administration, and by the Planetary Geology and Geophysics Program by a grant from the National Aeronautics and Space Administration.  ... 
doi:10.1017/cbo9780511525049.016 fatcat:qvhg73wozrho7ehifnw5364qmi
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