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https://www.readbyqxmd.com/read/29353330/leveraging-variable-sensor-spatial-acuity-with-a-homogeneous-multi-scale-place-recognition-framework
#1
Adam Jacobson, Zetao Chen, Michael Milford
Most robot navigation systems perform place recognition using a single-sensor modality and one, or at most two heterogeneous map scales. In contrast, mammals perform navigation by combining sensing from a wide variety of modalities including vision, auditory, olfactory and tactile senses with a multi-scale, homogeneous neural map of the environment. In this paper, we develop a multi-scale, multi-sensor system for mapping and place recognition that combines spatial localization hypotheses at different spatial scales from multiple different sensors to calculate an overall place recognition estimate...
January 20, 2018: Biological Cybernetics
https://www.readbyqxmd.com/read/29352689/morbidity-and-safety-of-iliac-crest-reference-array-pins-in-navigated-total-hip-arthroplasty-a-prospective-cohort-study
#2
Anton P Lambers, Xiang G Salim, Robert Jennings, Andrew T Bucknill
BACKGROUND: Navigated total hip arthroplasty (THA) can employ intra-osseous pins through a separate incision to secure reference arrays to the iliac crest. This study is the first to investigate the consequences of pin use in THA in vivo. METHODS: A prospective, consecutive series of 43 patients presenting for navigated THA were included. Two temporary 125 × 4 mm Schanz screws were inserted into the iliac crest for the attachment of a reference array. Telephone follow-up occurred at 6 and 12 weeks post-operatively...
December 28, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29352569/patient-navigation-reduces-time-to-care-for-patients-with-breast-symptoms-and-abnormal-screening-mammograms
#3
Elaine McKevitt, Carol Dingee, Rebecca Warburton, Jin-Si Pao, Carl J Brown, Christine Wilson, Urve Kuusk
INTRODUCTION: Concern has been raised about delays for patients presenting with breast symptoms in Canada. Our objective was to determine if our Rapid Access Breast Clinic (RABC) improved care for patients presenting with breast symptoms compared to the traditional system (TS). METHODS: A retrospective chart review tabulated demographic, surgical, pathology and radiologic information. Wait times to care were determined for patients presenting with symptomatic and screen detected breast problems...
January 5, 2018: American Journal of Surgery
https://www.readbyqxmd.com/read/29352498/autofocusing-based-phase-correction
#4
Alexander Loktyushin, Philipp Ehses, Bernhard Schölkopf, Klaus Scheffler
PURPOSE: Phase artifacts due to B0 inhomogeneity can severely degrade the quality of MR images. The artifacts are particularly prominent in long-TE scans and usually appear as ghosting and blur. We propose a retrospective phase correction method based on autofocusing. The proposed method uses raw data acquired with standard imaging sequences, and does not rely on navigators or external measures of field inhomogeneity. METHODS: We formulate and solve the optimization problem, where we seek the latent phase offsets that are associated with an optimal value of the image quality measure that is evaluated in the spatial domain...
January 19, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29351254/bridge-structure-deformation-prediction-based-on-gnss-data-using-kalman-arima-garch-model
#5
Jingzhou Xin, Jianting Zhou, Simon X Yang, Xiaoqing Li, Yu Wang
Bridges are an essential part of the ground transportation system. Health monitoring is fundamentally important for the safety and service life of bridges. A large amount of structural information is obtained from various sensors using sensing technology, and the data processing has become a challenging issue. To improve the prediction accuracy of bridge structure deformation based on data mining and to accurately evaluate the time-varying characteristics of bridge structure performance evolution, this paper proposes a new method for bridge structure deformation prediction, which integrates the Kalman filter, autoregressive integrated moving average model (ARIMA), and generalized autoregressive conditional heteroskedasticity (GARCH)...
January 19, 2018: Sensors
https://www.readbyqxmd.com/read/29351224/n-dimensional-lll-reduction-algorithm-with-pivoted-reflection
#6
Zhongliang Deng, Di Zhu, Lu Yin
The Lenstra-Lenstra-Lovász (LLL) lattice reduction algorithm and many of its variants have been widely used by cryptography, multiple-input-multiple-output (MIMO) communication systems and carrier phase positioning in global navigation satellite system (GNSS) to solve the integer least squares (ILS) problem. In this paper, we propose an n-dimensional LLL reduction algorithm (n-LLL), expanding the Lovász condition in LLL algorithm to n-dimensional space in order to obtain a further reduced basis. We also introduce pivoted Householder reflection into the algorithm to optimize the reduction time...
January 19, 2018: Sensors
https://www.readbyqxmd.com/read/29349993/-accurate-osteotomy-assisted-by-individualized-navigation-templates-for-the-treatment-of-children-cubitus-varus
#7
Peng-Fei Zheng, Jie Chen, Xu Peng Xux, Bo Jiang, Qing-Qiang Yao, Li-Ming Wang
OBJECTIVE: To investigate the feasibility and accuracy of a new navigation template for osteotomy in cubitus varus based on computer assistant design and 3D printing technology. METHODS: The preoperative CT images of 15 children with cubitus varus from June 2015 to June 2016 were collected. According to the above data, the individual osteotomy navigate template match the distal humerus was designed by the software and printed by the 3D printer. Accurate osteotomy was performed with the assistant of the navigate template in the operation...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349543/saving-robots-improves-laparoscopic-performance-transfer-of-skills-from-a-serious-game-to-a-virtual-reality-simulator
#8
Wouter M IJgosse, Harry van Goor, Jan-Maarten Luursema
BACKGROUND: Residents find it hard to commit to structural laparoscopic skills training. Serious gaming has been proposed as a solution on the premise that it is effective and more motivating than traditional simulation. We establish construct validity for the laparoscopic serious game Underground by comparing laparoscopic simulator performance for a control group and an Underground training group. METHODS: A four-session laparoscopic basic skills course is part of the medical master students surgical internship at the Radboud University Medical Centre...
January 18, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29349350/a-comparison-of-the-effects-of-epinephrine-and-xylometazoline-in-decreasing-nasal-bleeding-during-nasotracheal-intubation
#9
Jaegyok Song
Background: Various techniques have been introduced to decrease complications during nasotracheal intubation. A common practice is to use nasal packing with a cotton stick and 0.01% epinephrine jelly. However, this procedure can be painful to patients and can damage the nasal mucosa. Xylometazoline spray can induce effective vasoconstriction of the nasal mucosa without direct nasal trauma. In this study, we aimed to compare the efficacy of these two methods. Methods: Patients were randomly allocated into two groups (n = 40 each): xylometazoline spray group or epinephrine packing group...
December 2017: Journal of Dental Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29348512/ca1-and-ca3-differentially-support-spontaneous-retrieval-of-episodic-contexts-within-human-hippocampal-subfields
#10
Halle R Dimsdale-Zucker, Maureen Ritchey, Arne D Ekstrom, Andrew P Yonelinas, Charan Ranganath
The hippocampus plays a critical role in spatial and episodic memory. Mechanistic models predict that hippocampal subfields have computational specializations that differentially support memory. However, there is little empirical evidence suggesting differences between the subfields, particularly in humans. To clarify how hippocampal subfields support human spatial and episodic memory, we developed a virtual reality paradigm where participants passively navigated through houses (spatial contexts) across a series of videos (episodic contexts)...
January 18, 2018: Nature Communications
https://www.readbyqxmd.com/read/29348056/achieving-local-and-global-shared-realities-distance-guides-alignment-to-specific-or-general-social-influences
#11
REVIEW
Alison Ledgerwood, Y Andre Wang
Humans routinely navigate a multitude of potential social influences, ranging from specific individual's opinions to general social norms and group values. Whereas specific social influences afford opportunities to achieve shared inner states with particular individuals, general social influences afford opportunities to achieve shared inner states with broader groups. We review recent theory and evidence examining how people tune into different kinds of social influence in the service of shared reality. We argue that the distance of an attitude object (e...
January 8, 2018: Current Opinion in Psychology
https://www.readbyqxmd.com/read/29346830/feasibility-of-navigable-percutaneous-disk-decompressor-l-disq-c-for-cervical-disk-herniation
#12
Youngki Hong, Seunghan Yoo, Nack Hwan Kim, Yushin Kim, Sangho Sohn, Sung-Young Yoon, Sangheon Lee
OBJECTIVE:  To assess the procedural efficacy and safety of a Navigable Percutaneous Disk Decompressor (L'DISQ-C) for cervical disk herniation. METHODS:  We performed intradiskal decompression on cervical spine specimens from five human cadavers using the L'DISQ-C under C-arm fluoroscopic guidance. We evaluated our success for positioning the navigable wand tip into the target region and recorded temperature variation at various distances from the wand tip in the cervical nucleus pulposus...
January 18, 2018: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/29346323/sculling-compensation-algorithm-for-sins-based-on-two-time-scale-perturbation-model-of-inertial-measurements
#13
Lingling Wang, Li Fu, Ming Xin
In order to decrease the velocity sculling error under vibration environments, a new sculling error compensation algorithm for strapdown inertial navigation system (SINS) using angular rate and specific force measurements as inputs is proposed in this paper. First, the sculling error formula in incremental velocity update is analytically derived in terms of the angular rate and specific force. Next, two-time scale perturbation models of the angular rate and specific force are constructed. The new sculling correction term is derived and a gravitational search optimization method is used to determine the parameters in the two-time scale perturbation models...
January 18, 2018: Sensors
https://www.readbyqxmd.com/read/29346321/new-control-paradigms-for-resources-saving-an-approach-for-mobile-robots-navigation
#14
Rafael Socas, Raquel Dormido, Sebastián Dormido
In this work, an event-based control scheme is presented. The proposed system has been developed to solve control problems appearing in the field of Networked Control Systems (NCS). Several models and methodologies have been proposed to measure different resources consumptions. The use of bandwidth, computational load and energy resources have been investigated. This analysis shows how the parameters of the system impacts on the resources efficiency. Moreover, the proposed system has been compared with its equivalent discrete-time solution...
January 18, 2018: Sensors
https://www.readbyqxmd.com/read/29346156/developing-a-mobile-app-for-prevention-and-treatment-of-pressure-injuries
#15
Geraldo Magela Salomé, Lydia Masako Ferreira
OBJECTIVE: This descriptive study describes the planning and development of a mobile application (app) for prevention and treatment of pressure injuries for use by providers in a university research center. The app delineates risk factors for pressure injury development, provides an evaluation of the wound, recommends wound cleansing procedures, performs pressure injury staging, and recommends treatment interventions. METHODS: A mobile app was developed using a contextualized instructional design, which involves a constructivist proposal and planning, developing, and applying specific didactic situations, thus incorporating mechanisms that favor contextualization...
February 2018: Advances in Skin & Wound Care
https://www.readbyqxmd.com/read/29346106/spatial-position-measurement-system-for-surgical-navigation-using-3-d-image-marker-based-tracking-tools-with-compact-volume
#16
Zhencheng Fan, Guowen Chen, Junchen Wang, Hongen Liao
We develop a spatial position measurement system using three-dimensional (3-D) image marker-based tracking tools targeted at surgical navigation in minimally invasive surgery. We generate 3-D image markers with spatial information encoded to 2-D images, design tracking tools with the 3-D image markers, and analyze the tracking tools' theoretical spatial errors, which are primarily limited by the spatial distribution of reconstructed fiducial 3-D markers. A pattern analysis-based positional measurement algorithm is developed to calculate the tool's spatial information using its spatial configuration...
February 2018: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/29346001/strategies-and-challenges-in-preventing-violence-against-canadian-indoor-sex-workers
#17
Vicky Bungay, Adrian Guta
OBJECTIVES: To examine indoor sex workers' strategies in preventing workplace violence and influential socio-structural conditions. METHODS: Data included qualitative interviews with 85 sex workers in British Columbia, Canada, from 2014 through 2016. For analyses, we used interpretive thematic techniques informed by World Health Organization position statements on violence. RESULTS: Robbery, nonpayment, financial exploitation, and privacy violations were frequent types of violence perpetrated by clients, landlords, and neighbors...
January 18, 2018: American Journal of Public Health
https://www.readbyqxmd.com/read/29345992/the-effect-of-patient-navigation-on-the-likelihood-of-engagement-in-clinical-care-for-hiv-infected-individuals-leaving-jail
#18
Janet J Myers, Mi-Suk Kang Dufour, Kimberly A Koester, Mark Morewitz, Rebecca Packard, Kate Monico Klein, Milton Estes, Brie Williams, Alissa Riker, Jacqueline Tulsky
OBJECTIVES: To compare the effectiveness of patient navigation-enhanced case management in supporting engagement in HIV care upon release from jail relative to existing services. METHODS: We randomized 270 HIV-infected individuals to receive navigation-enhanced case management for 12 months or standard case management for 90 days following release from jail between 2010 and 2013. Participants were interviewed at 2, 6, and 12 months after release. We abstracted medical data from jail and city health records...
January 18, 2018: American Journal of Public Health
https://www.readbyqxmd.com/read/29345583/editorial-controversies-in-the-cath-lab-navigating-contemporary-conundrums-before-during-and-after-intervention
#19
EDITORIAL
Diana Gorog, Tobias Geisler
No abstract text is available yet for this article.
January 17, 2018: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/29345356/ethical-and-practical-considerations-in-the-use-of-a-predictive-model-to-trigger-suicide-prevention-interventions-in-healthcare-settings
#20
Raymond P Tucker, Meredith J Tackett, David Glickman, Mark A Reger
Predictive models that utilize data from electronic healthcare records (EHR) have been developed, investigated, and appear to provide an important resource for suicide prevention in medical settings. Actuarial approaches to predicting suicide may be particularly important given the relative inability of clinicians to accurately predict suicide. Although research regarding predictive models that utilize EHR is certainly promising, ethical considerations for the use of these models to trigger suicide prevention interventions warrant careful consideration...
January 18, 2018: Suicide & Life-threatening Behavior
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