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https://www.readbyqxmd.com/read/28531135/aekf-slam-a-new-algorithm-for-robotic-underwater-navigation
#1
Xin Yuan, José-Fernán Martínez-Ortega, José Antonio Sánchez Fernández, Martina Eckert
In this work, we focus on key topics related to underwater Simultaneous Localization and Mapping (SLAM) applications. Moreover, a detailed review of major studies in the literature and our proposed solutions for addressing the problem are presented. The main goal of this paper is the enhancement of the accuracy and robustness of the SLAM-based navigation problem for underwater robotics with low computational costs. Therefore, we present a new method called AEKF-SLAM that employs an Augmented Extended Kalman Filter (AEKF)-based SLAM algorithm...
May 21, 2017: Sensors
https://www.readbyqxmd.com/read/28527025/pose-aware-c-arm-for-automatic-re-initialization-of-interventional-2d-3d-image-registration
#2
Javad Fotouhi, Bernhard Fuerst, Alex Johnson, Sing Chun Lee, Russell Taylor, Greg Osgood, Nassir Navab, Mehran Armand
PURPOSE: In minimally invasive interventions assisted by C-arm imaging, there is a demand to fuse the intra-interventional 2D C-arm image with pre-interventional 3D patient data to enable surgical guidance. The commonly used intensity-based 2D/3D registration has a limited capture range and is sensitive to initialization. We propose to utilize an opto/X-ray C-arm system which allows to maintain the registration during intervention by automating the re-initialization for the 2D/3D image registration...
May 19, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28525793/-almost-a-slam-dunk-assessing-the-experiences-and-opinions-of-participants-in-a-national-basketball-association-nba-funded-dropout-prevention-program
#3
Tray J Geiger, Audrey Amrein-Beardsley
Researchers conducted an evaluation of participants' perceptions of a dropout prevention program - the NBA High School program - involving a National Basketball Association (NBA) team, a high school located in downtown [City], and the College of Education (COE) at the local State University (SU). The program targeted "at-risk" high school students while utilizing student-teachers as tutors and mentors. Researchers utilized mixed methods to assess student, student-teacher, and high school teacher participants' experiences with and opinions of the program...
May 10, 2017: Evaluation and Program Planning
https://www.readbyqxmd.com/read/28521384/analysis-of-tenodesis-techiques-for-treatment-of-scapholunate-instability-using-the-finite-element-method
#4
Teresa Alonso Rasgado, Qinghang Zhang, David Jimenez Cruz, Colin Bailey, Elizabeth Pinder, Avanthi Mandaleson, Sumedh Talwalkar
Chronic Scapholunate ligament (SL) injuries are difficult to treat and can lead to wrist dysfunction. Whilst several tendon reconstruction techniques have been employed in the management of SL instability, SL gap reappearance after surgery has been reported. Using finite element model and cadaveric study data we investigated the performance of the Corella, schapolunate axis (SLAM) and modified Brunelli tenodesis (MBT) techniques. Virtual tenodesis surgery was undertaken in 3D finite element (FE) models to obtain the scapholunate (SL) gap and angle resulting from the three reconstruction techniques...
May 18, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28508345/deep-monocular-3d-reconstruction-for-assisted-navigation-in-bronchoscopy
#5
Marco Visentini-Scarzanella, Takamasa Sugiura, Toshimitsu Kaneko, Shinichiro Koto
PURPOSE: In bronchoschopy, computer vision systems for navigation assistance are an attractive low-cost solution to guide the endoscopist to target peripheral lesions for biopsy and histological analysis. We propose a decoupled deep learning architecture that projects input frames onto the domain of CT renderings, thus allowing offline training from patient-specific CT data. METHODS: A fully convolutional network architecture is implemented on GPU and tested on a phantom dataset involving 32 video sequences and [Formula: see text]60k frames with aligned ground truth and renderings, which is made available as the first public dataset for bronchoscopy navigation...
May 15, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28460404/annals-story-slam-sit-up-straight
#6
Karole Collier
No abstract text is available yet for this article.
May 2, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28460403/annals-story-slam-the-problematic-prayer
#7
Stephen Ludwig
No abstract text is available yet for this article.
May 2, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28460402/annals-story-slam-the-uncomfortable-role
#8
Hayley Goldbach
No abstract text is available yet for this article.
May 2, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28460401/annals-story-slam-fallible
#9
Vidya B Viswanathan
No abstract text is available yet for this article.
May 2, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28460400/annals-story-slam-summertime-and-the-living-is-easy
#10
Jerry Johnson
No abstract text is available yet for this article.
May 2, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28460399/annals-story-slam-why-us-why-not-us
#11
Rebecca Hoffman
No abstract text is available yet for this article.
May 2, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28460398/annals-story-slam-timeline
#12
Rachel Kelz
No abstract text is available yet for this article.
May 2, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28460397/annals-story-slam-perspective-from-abroad
#13
Stephen J Gluckman
No abstract text is available yet for this article.
May 2, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28460138/the-relative-impact-of-sleep-and-circadian-drive-on-motor-skill-acquisition-and-memory-consolidation
#14
Matthew A Tucker, Christopher J Morris, Alexandra Morgan, Jessica Yang, Samantha Myers, Joanna Garcia Pierce, Robert Stickgold, Frank A J L Scheer
Study Objectives: Sleep during the biological night facilitates memory consolidation. Here we determined the impact of sleep and wake on motor skill learning (acquisition) and subsequent off-line skill improvement (memory consolidation), independent of circadian phase, and compared this to the impact of the endogenous circadian system, independent of whether sleep occurred during the biological night or day. Methods: Participants completed two 8-day sleep laboratory visits, adhering on one visit to a circadian aligned ("normal") sleep schedule for the full duration of the protocol, and on the other to a circadian misaligned (12-hour inverted) schedule, with alignment during the first 3 days, a 12-hour 'slam shift' on Day 4, followed by circadian misalignment during the last 4 days of the protocol...
April 1, 2017: Sleep
https://www.readbyqxmd.com/read/28456200/microscopic-insight-into-thermodynamics-of-conformational-changes-of-sap-slam-complex-in-signal-transduction-cascade
#15
Sudipta Samanta, Sanchita Mukherjee
The signalling lymphocytic activation molecule (SLAM) family of receptors, expressed by an array of immune cells, associate with SLAM-associated protein (SAP)-related molecules, composed of single SH2 domain architecture. SAP activates Src-family kinase Fyn after SLAM ligation, resulting in a SLAM-SAP-Fyn complex, where, SAP binds the Fyn SH3 domain that does not involve canonical SH3 or SH2 interactions. This demands insight into this SAP mediated signalling cascade. Thermodynamics of the conformational changes are extracted from the histograms of dihedral angles obtained from the all-atom molecular dynamics simulations of this structurally well characterized SAP-SLAM complex...
April 28, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28425946/robot-beacon-distributed-range-only-slam-for-resource-constrained-operation
#16
Arturo Torres-González, Jose Ramiro Martínez-de Dios, Anibal Ollero
This work deals with robot-sensor network cooperation where sensor nodes (beacons) are used as landmarks for Range-Only (RO) Simultaneous Localization and Mapping (SLAM). Most existing RO-SLAM techniques consider beacons as passive devices disregarding the sensing, computational and communication capabilities with which they are actually endowed. SLAM is a resource-demanding task. Besides the technological constraints of the robot and beacons, many applications impose further resource consumption limitations...
April 20, 2017: Sensors
https://www.readbyqxmd.com/read/28424516/slamf7-is-critical-for-phagocytosis-of-haematopoietic-tumour-cells-via-mac-1-integrin
#17
Jun Chen, Ming-Chao Zhong, Huaijian Guo, Dominique Davidson, Sabrin Mishel, Yan Lu, Inmoo Rhee, Luis-Alberto Pérez-Quintero, Shaohua Zhang, Mario-Ernesto Cruz-Munoz, Ning Wu, Donald C Vinh, Meenal Sinha, Virginie Calderon, Clifford A Lowell, Jayne S Danska, André Veillette
Cancer cells elude anti-tumour immunity through multiple mechanisms, including upregulated expression of ligands for inhibitory immune checkpoint receptors. Phagocytosis by macrophages plays a critical role in cancer control. Therapeutic blockade of signal regulatory protein (SIRP)-α, an inhibitory receptor on macrophages, or of its ligand CD47 expressed on tumour cells, improves tumour cell elimination in vitro and in vivo, suggesting that blockade of the SIRPα-CD47 checkpoint could be useful in treating human cancer...
April 27, 2017: Nature
https://www.readbyqxmd.com/read/28419512/predicting-receptor-functionality-of-signaling-lymphocyte-activation-molecule-for-measles-virus-hemagglutinin-from-docking-simulation
#18
Yoshiyuki Suzuki
Predicting susceptibility to a virus in various species is desirable for risk assessment of interspecies transmission. For screening of susceptibility, it may be useful to evaluate the receptor functionality. Here the docking simulation was conducted for measles virus hemagglutinin (MV-H) and immunoglobulin-like variable domain of signaling lymphocyte activation molecule (SLAM-V). It wasobserved that the docking score of MV-H and SLAM-V was correlated with the activity of SLAM as MV receptor. These results suggest that the receptor functionality may be predicted from the docking score of virion surface proteins and cellular receptor molecules...
April 17, 2017: Microbiology and Immunology
https://www.readbyqxmd.com/read/28401643/ultrafast-compartmentalized-relaxation-time-mapping-with-linear-algebraic-modeling
#19
Yi Zhang, Xiaoyang Liu, Jinyuan Zhou, Paul A Bottomley
PURPOSE: To dramatically accelerate compartmental-average longitudinal (T1 ) and transverse (T2 ) relaxation measurements using the minimal-acquisition linear algebraic modeling (SLAM) method, and to validate it in phantoms and humans. METHODS: Relaxation times were imaged at 3 Tesla in phantoms, in the abdomens of six volunteers, and in six brain tumor patients using standard inversion recovery and multi-spin-echo sequences. k-space was fully sampled to provide reference T1 and T2 measurements, and SLAM was performed using a limited set of phase encodes from central k-space...
April 11, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28397758/a-multi-sensorial-simultaneous-localization-and-mapping-slam-system-for-low-cost-micro-aerial-vehicles-in-gps-denied-environments
#20
Elena López, Sergio García, Rafael Barea, Luis M Bergasa, Eduardo J Molinos, Roberto Arroyo, Eduardo Romera, Samuel Pardo
One of the main challenges of aerial robots navigation in indoor or GPS-denied environments is position estimation using only the available onboard sensors. This paper presents a Simultaneous Localization and Mapping (SLAM) system that remotely calculates the pose and environment map of different low-cost commercial aerial platforms, whose onboard computing capacity is usually limited. The proposed system adapts to the sensory configuration of the aerial robot, by integrating different state-of-the art SLAM methods based on vision, laser and/or inertial measurements using an Extended Kalman Filter (EKF)...
April 8, 2017: Sensors
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